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correct ft32 reloc range test
[deliverable/binutils-gdb.git] / bfd / elfnn-aarch64.c
1 /* AArch64-specific support for NN-bit ELF.
2 Copyright (C) 2009-2018 Free Software Foundation, Inc.
3 Contributed by ARM Ltd.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
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.
11
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.
16
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/>. */
20
21 /* Notes on implementation:
22
23 Thread Local Store (TLS)
24
25 Overview:
26
27 The implementation currently supports both traditional TLS and TLS
28 descriptors, but only general dynamic (GD).
29
30 For traditional TLS the assembler will present us with code
31 fragments of the form:
32
33 adrp x0, :tlsgd:foo
34 R_AARCH64_TLSGD_ADR_PAGE21(foo)
35 add x0, :tlsgd_lo12:foo
36 R_AARCH64_TLSGD_ADD_LO12_NC(foo)
37 bl __tls_get_addr
38 nop
39
40 For TLS descriptors the assembler will present us with code
41 fragments of the form:
42
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)
46 .tlsdesccall foo
47 blr x1 R_AARCH64_TLSDESC_CALL(foo)
48
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.
52
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.
56
57 The precise instruction sequence is only relevant from the
58 perspective of linker relaxation which is currently not implemented.
59
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.
64
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.
70
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.
75
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.
80
81 Implementation:
82
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.
86
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.
92
93 The flow:
94
95 elfNN_aarch64_check_relocs()
96
97 This function is invoked for each relocation.
98
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.
103
104 The reference count for a symbol is incremented. The GOT type for
105 each symbol is marked as general dynamic.
106
107 elfNN_aarch64_allocate_dynrelocs ()
108
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
113 for this symbol.
114
115 elfNN_aarch64_size_dynamic_sections ()
116
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.
121
122 elfNN_aarch64_relocate_section ()
123
124 Calls elfNN_aarch64_final_link_relocate ()
125
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.
133
134 elfNN_aarch64_final_link_relocate ()
135
136 Fixup the R_AARCH64_TLSGD_{ADR_PREL21, ADD_LO12_NC} relocations. */
137
138 #include "sysdep.h"
139 #include "bfd.h"
140 #include "libiberty.h"
141 #include "libbfd.h"
142 #include "bfd_stdint.h"
143 #include "elf-bfd.h"
144 #include "bfdlink.h"
145 #include "objalloc.h"
146 #include "elf/aarch64.h"
147 #include "elfxx-aarch64.h"
148
149 #define ARCH_SIZE NN
150
151 #if ARCH_SIZE == 64
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
158 #endif
159
160 #if ARCH_SIZE == 32
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
168 #endif
169
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)))
213
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)
237
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)
251
252 #define ELIMINATE_COPY_RELOCS 1
253
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))
257
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)
263
264 /* Encoding of the nop instruction. */
265 #define INSN_NOP 0xd503201f
266
267 #define aarch64_compute_jump_table_size(htab) \
268 (((htab)->root.srelplt == NULL) ? 0 \
269 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
270
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] =
277 {
278 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
279 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
280 #if ARCH_SIZE == 64
281 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
282 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
283 #else
284 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
285 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
286 #endif
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 */
291 };
292
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] =
297 {
298 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
299 #if ARCH_SIZE == 64
300 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
301 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
302 #else
303 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
304 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
305 #endif
306 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
307 };
308
309 static const bfd_byte
310 elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] =
311 {
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 */
315 #if ARCH_SIZE == 64
316 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
317 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
318 #else
319 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
320 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
321 #endif
322 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
323 0x1f, 0x20, 0x03, 0xd5, /* nop */
324 0x1f, 0x20, 0x03, 0xd5, /* nop */
325 };
326
327 #define elf_info_to_howto elfNN_aarch64_info_to_howto
328 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
329
330 #define AARCH64_ELF_ABI_VERSION 0
331
332 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
333 #define ALL_ONES (~ (bfd_vma) 0)
334
335 /* Indexed by the bfd interal reloc enumerators.
336 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
337 in reloc.c. */
338
339 static reloc_howto_type elfNN_aarch64_howto_table[] =
340 {
341 EMPTY_HOWTO (0),
342
343 /* Basic data relocations. */
344
345 /* Deprecated, but retained for backwards compatibility. */
346 HOWTO64 (R_AARCH64_NULL, /* type */
347 0, /* rightshift */
348 3, /* size (0 = byte, 1 = short, 2 = long) */
349 0, /* bitsize */
350 FALSE, /* pc_relative */
351 0, /* bitpos */
352 complain_overflow_dont, /* complain_on_overflow */
353 bfd_elf_generic_reloc, /* special_function */
354 "R_AARCH64_NULL", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0, /* dst_mask */
358 FALSE), /* pcrel_offset */
359 HOWTO (R_AARCH64_NONE, /* type */
360 0, /* rightshift */
361 3, /* size (0 = byte, 1 = short, 2 = long) */
362 0, /* bitsize */
363 FALSE, /* pc_relative */
364 0, /* bitpos */
365 complain_overflow_dont, /* complain_on_overflow */
366 bfd_elf_generic_reloc, /* special_function */
367 "R_AARCH64_NONE", /* name */
368 FALSE, /* partial_inplace */
369 0, /* src_mask */
370 0, /* dst_mask */
371 FALSE), /* pcrel_offset */
372
373 /* .xword: (S+A) */
374 HOWTO64 (AARCH64_R (ABS64), /* type */
375 0, /* rightshift */
376 4, /* size (4 = long long) */
377 64, /* bitsize */
378 FALSE, /* pc_relative */
379 0, /* bitpos */
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 */
387
388 /* .word: (S+A) */
389 HOWTO (AARCH64_R (ABS32), /* type */
390 0, /* rightshift */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
392 32, /* bitsize */
393 FALSE, /* pc_relative */
394 0, /* bitpos */
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 */
402
403 /* .half: (S+A) */
404 HOWTO (AARCH64_R (ABS16), /* type */
405 0, /* rightshift */
406 1, /* size (0 = byte, 1 = short, 2 = long) */
407 16, /* bitsize */
408 FALSE, /* pc_relative */
409 0, /* bitpos */
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 */
417
418 /* .xword: (S+A-P) */
419 HOWTO64 (AARCH64_R (PREL64), /* type */
420 0, /* rightshift */
421 4, /* size (4 = long long) */
422 64, /* bitsize */
423 TRUE, /* pc_relative */
424 0, /* bitpos */
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 */
432
433 /* .word: (S+A-P) */
434 HOWTO (AARCH64_R (PREL32), /* type */
435 0, /* rightshift */
436 2, /* size (0 = byte, 1 = short, 2 = long) */
437 32, /* bitsize */
438 TRUE, /* pc_relative */
439 0, /* bitpos */
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 */
447
448 /* .half: (S+A-P) */
449 HOWTO (AARCH64_R (PREL16), /* type */
450 0, /* rightshift */
451 1, /* size (0 = byte, 1 = short, 2 = long) */
452 16, /* bitsize */
453 TRUE, /* pc_relative */
454 0, /* bitpos */
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 */
462
463 /* Group relocations to create a 16, 32, 48 or 64 bit
464 unsigned data or abs address inline. */
465
466 /* MOVZ: ((S+A) >> 0) & 0xffff */
467 HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */
468 0, /* rightshift */
469 2, /* size (0 = byte, 1 = short, 2 = long) */
470 16, /* bitsize */
471 FALSE, /* pc_relative */
472 0, /* bitpos */
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 */
480
481 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
482 HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 16, /* bitsize */
486 FALSE, /* pc_relative */
487 0, /* bitpos */
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 */
495
496 /* MOVZ: ((S+A) >> 16) & 0xffff */
497 HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */
498 16, /* rightshift */
499 2, /* size (0 = byte, 1 = short, 2 = long) */
500 16, /* bitsize */
501 FALSE, /* pc_relative */
502 0, /* bitpos */
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 */
510
511 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
512 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */
513 16, /* rightshift */
514 2, /* size (0 = byte, 1 = short, 2 = long) */
515 16, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
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 */
525
526 /* MOVZ: ((S+A) >> 32) & 0xffff */
527 HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */
528 32, /* rightshift */
529 2, /* size (0 = byte, 1 = short, 2 = long) */
530 16, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
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 */
540
541 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
542 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */
543 32, /* rightshift */
544 2, /* size (0 = byte, 1 = short, 2 = long) */
545 16, /* bitsize */
546 FALSE, /* pc_relative */
547 0, /* bitpos */
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 */
555
556 /* MOVZ: ((S+A) >> 48) & 0xffff */
557 HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */
558 48, /* rightshift */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
560 16, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
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 */
570
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. */
574
575 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
576 HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */
577 0, /* rightshift */
578 2, /* size (0 = byte, 1 = short, 2 = long) */
579 17, /* bitsize */
580 FALSE, /* pc_relative */
581 0, /* bitpos */
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 */
589
590 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
591 HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */
592 16, /* rightshift */
593 2, /* size (0 = byte, 1 = short, 2 = long) */
594 17, /* bitsize */
595 FALSE, /* pc_relative */
596 0, /* bitpos */
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 */
604
605 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
606 HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */
607 32, /* rightshift */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
609 17, /* bitsize */
610 FALSE, /* pc_relative */
611 0, /* bitpos */
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 */
619
620 /* Group relocations to create a 16, 32, 48 or 64 bit
621 PC relative address inline. */
622
623 /* MOV[NZ]: ((S+A-P) >> 0) & 0xffff */
624 HOWTO64 (AARCH64_R (MOVW_PREL_G0), /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 17, /* bitsize */
628 TRUE, /* pc_relative */
629 0, /* bitpos */
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 */
637
638 /* MOVK: ((S+A-P) >> 0) & 0xffff [no overflow check] */
639 HOWTO64 (AARCH64_R (MOVW_PREL_G0_NC), /* type */
640 0, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 16, /* bitsize */
643 TRUE, /* pc_relative */
644 0, /* bitpos */
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 */
652
653 /* MOV[NZ]: ((S+A-P) >> 16) & 0xffff */
654 HOWTO64 (AARCH64_R (MOVW_PREL_G1), /* type */
655 16, /* rightshift */
656 2, /* size (0 = byte, 1 = short, 2 = long) */
657 17, /* bitsize */
658 TRUE, /* pc_relative */
659 0, /* bitpos */
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 */
667
668 /* MOVK: ((S+A-P) >> 16) & 0xffff [no overflow check] */
669 HOWTO64 (AARCH64_R (MOVW_PREL_G1_NC), /* type */
670 16, /* rightshift */
671 2, /* size (0 = byte, 1 = short, 2 = long) */
672 16, /* bitsize */
673 TRUE, /* pc_relative */
674 0, /* bitpos */
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 */
682
683 /* MOV[NZ]: ((S+A-P) >> 32) & 0xffff */
684 HOWTO64 (AARCH64_R (MOVW_PREL_G2), /* type */
685 32, /* rightshift */
686 2, /* size (0 = byte, 1 = short, 2 = long) */
687 17, /* bitsize */
688 TRUE, /* pc_relative */
689 0, /* bitpos */
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 */
697
698 /* MOVK: ((S+A-P) >> 32) & 0xffff [no overflow check] */
699 HOWTO64 (AARCH64_R (MOVW_PREL_G2_NC), /* type */
700 32, /* rightshift */
701 2, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 TRUE, /* pc_relative */
704 0, /* bitpos */
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 */
712
713 /* MOV[NZ]: ((S+A-P) >> 48) & 0xffff */
714 HOWTO64 (AARCH64_R (MOVW_PREL_G3), /* type */
715 48, /* rightshift */
716 2, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 TRUE, /* pc_relative */
719 0, /* bitpos */
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 */
727
728 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
729 addresses: PG(x) is (x & ~0xfff). */
730
731 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
732 HOWTO (AARCH64_R (LD_PREL_LO19), /* type */
733 2, /* rightshift */
734 2, /* size (0 = byte, 1 = short, 2 = long) */
735 19, /* bitsize */
736 TRUE, /* pc_relative */
737 0, /* bitpos */
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 */
745
746 /* ADR: (S+A-P) & 0x1fffff */
747 HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */
748 0, /* rightshift */
749 2, /* size (0 = byte, 1 = short, 2 = long) */
750 21, /* bitsize */
751 TRUE, /* pc_relative */
752 0, /* bitpos */
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 */
760
761 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
762 HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */
763 12, /* rightshift */
764 2, /* size (0 = byte, 1 = short, 2 = long) */
765 21, /* bitsize */
766 TRUE, /* pc_relative */
767 0, /* bitpos */
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 */
775
776 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
777 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */
778 12, /* rightshift */
779 2, /* size (0 = byte, 1 = short, 2 = long) */
780 21, /* bitsize */
781 TRUE, /* pc_relative */
782 0, /* bitpos */
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 */
790
791 /* ADD: (S+A) & 0xfff [no overflow check] */
792 HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */
793 0, /* rightshift */
794 2, /* size (0 = byte, 1 = short, 2 = long) */
795 12, /* bitsize */
796 FALSE, /* pc_relative */
797 10, /* bitpos */
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 */
805
806 /* LD/ST8: (S+A) & 0xfff */
807 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */
808 0, /* rightshift */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
810 12, /* bitsize */
811 FALSE, /* pc_relative */
812 0, /* bitpos */
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 */
820
821 /* Relocations for control-flow instructions. */
822
823 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
824 HOWTO (AARCH64_R (TSTBR14), /* type */
825 2, /* rightshift */
826 2, /* size (0 = byte, 1 = short, 2 = long) */
827 14, /* bitsize */
828 TRUE, /* pc_relative */
829 0, /* bitpos */
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 */
837
838 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
839 HOWTO (AARCH64_R (CONDBR19), /* type */
840 2, /* rightshift */
841 2, /* size (0 = byte, 1 = short, 2 = long) */
842 19, /* bitsize */
843 TRUE, /* pc_relative */
844 0, /* bitpos */
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 */
852
853 /* B: ((S+A-P) >> 2) & 0x3ffffff */
854 HOWTO (AARCH64_R (JUMP26), /* type */
855 2, /* rightshift */
856 2, /* size (0 = byte, 1 = short, 2 = long) */
857 26, /* bitsize */
858 TRUE, /* pc_relative */
859 0, /* bitpos */
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 */
867
868 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
869 HOWTO (AARCH64_R (CALL26), /* type */
870 2, /* rightshift */
871 2, /* size (0 = byte, 1 = short, 2 = long) */
872 26, /* bitsize */
873 TRUE, /* pc_relative */
874 0, /* bitpos */
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 */
882
883 /* LD/ST16: (S+A) & 0xffe */
884 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */
885 1, /* rightshift */
886 2, /* size (0 = byte, 1 = short, 2 = long) */
887 12, /* bitsize */
888 FALSE, /* pc_relative */
889 0, /* bitpos */
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 */
897
898 /* LD/ST32: (S+A) & 0xffc */
899 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */
900 2, /* rightshift */
901 2, /* size (0 = byte, 1 = short, 2 = long) */
902 12, /* bitsize */
903 FALSE, /* pc_relative */
904 0, /* bitpos */
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 */
912
913 /* LD/ST64: (S+A) & 0xff8 */
914 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */
915 3, /* rightshift */
916 2, /* size (0 = byte, 1 = short, 2 = long) */
917 12, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
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 */
927
928 /* LD/ST128: (S+A) & 0xff0 */
929 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */
930 4, /* rightshift */
931 2, /* size (0 = byte, 1 = short, 2 = long) */
932 12, /* bitsize */
933 FALSE, /* pc_relative */
934 0, /* bitpos */
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 */
942
943 /* Set a load-literal immediate field to bits
944 0x1FFFFC of G(S)-P */
945 HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */
946 2, /* rightshift */
947 2, /* size (0 = byte,1 = short,2 = long) */
948 19, /* bitsize */
949 TRUE, /* pc_relative */
950 0, /* bitpos */
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 */
958
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 */
962 12, /* rightshift */
963 2, /* size (0 = byte, 1 = short, 2 = long) */
964 21, /* bitsize */
965 TRUE, /* pc_relative */
966 0, /* bitpos */
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 */
974
975 /* LD64: GOT offset G(S) & 0xff8 */
976 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */
977 3, /* rightshift */
978 2, /* size (0 = byte, 1 = short, 2 = long) */
979 12, /* bitsize */
980 FALSE, /* pc_relative */
981 0, /* bitpos */
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 */
989
990 /* LD32: GOT offset G(S) & 0xffc */
991 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */
992 2, /* rightshift */
993 2, /* size (0 = byte, 1 = short, 2 = long) */
994 12, /* bitsize */
995 FALSE, /* pc_relative */
996 0, /* bitpos */
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 */
1004
1005 /* Lower 16 bits of GOT offset for the symbol. */
1006 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G0_NC), /* type */
1007 0, /* rightshift */
1008 2, /* size (0 = byte, 1 = short, 2 = long) */
1009 16, /* bitsize */
1010 FALSE, /* pc_relative */
1011 0, /* bitpos */
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 */
1019
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) */
1024 16, /* bitsize */
1025 FALSE, /* pc_relative */
1026 0, /* bitpos */
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 */
1034
1035 /* LD64: GOT offset for the symbol. */
1036 HOWTO64 (AARCH64_R (LD64_GOTOFF_LO15), /* type */
1037 3, /* rightshift */
1038 2, /* size (0 = byte, 1 = short, 2 = long) */
1039 12, /* bitsize */
1040 FALSE, /* pc_relative */
1041 0, /* bitpos */
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 */
1049
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 */
1053 2, /* rightshift */
1054 2, /* size (0 = byte, 1 = short, 2 = long) */
1055 12, /* bitsize */
1056 FALSE, /* pc_relative */
1057 0, /* bitpos */
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 */
1065
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 */
1069 3, /* rightshift */
1070 2, /* size (0 = byte, 1 = short, 2 = long) */
1071 12, /* bitsize */
1072 FALSE, /* pc_relative */
1073 0, /* bitpos */
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 */
1081
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) */
1087 21, /* bitsize */
1088 TRUE, /* pc_relative */
1089 0, /* bitpos */
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 */
1097
1098 HOWTO (AARCH64_R (TLSGD_ADR_PREL21), /* type */
1099 0, /* rightshift */
1100 2, /* size (0 = byte, 1 = short, 2 = long) */
1101 21, /* bitsize */
1102 TRUE, /* pc_relative */
1103 0, /* bitpos */
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 */
1111
1112 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1113 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */
1114 0, /* rightshift */
1115 2, /* size (0 = byte, 1 = short, 2 = long) */
1116 12, /* bitsize */
1117 FALSE, /* pc_relative */
1118 0, /* bitpos */
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 */
1126
1127 /* Lower 16 bits of GOT offset to tls_index. */
1128 HOWTO64 (AARCH64_R (TLSGD_MOVW_G0_NC), /* type */
1129 0, /* rightshift */
1130 2, /* size (0 = byte, 1 = short, 2 = long) */
1131 16, /* bitsize */
1132 FALSE, /* pc_relative */
1133 0, /* bitpos */
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 */
1141
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) */
1146 16, /* bitsize */
1147 FALSE, /* pc_relative */
1148 0, /* bitpos */
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 */
1156
1157 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */
1158 12, /* rightshift */
1159 2, /* size (0 = byte, 1 = short, 2 = long) */
1160 21, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
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 */
1170
1171 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */
1172 3, /* rightshift */
1173 2, /* size (0 = byte, 1 = short, 2 = long) */
1174 12, /* bitsize */
1175 FALSE, /* pc_relative */
1176 0, /* bitpos */
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 */
1184
1185 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */
1186 2, /* rightshift */
1187 2, /* size (0 = byte, 1 = short, 2 = long) */
1188 12, /* bitsize */
1189 FALSE, /* pc_relative */
1190 0, /* bitpos */
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 */
1198
1199 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */
1200 2, /* rightshift */
1201 2, /* size (0 = byte, 1 = short, 2 = long) */
1202 19, /* bitsize */
1203 FALSE, /* pc_relative */
1204 0, /* bitpos */
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 */
1212
1213 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */
1214 0, /* rightshift */
1215 2, /* size (0 = byte, 1 = short, 2 = long) */
1216 16, /* bitsize */
1217 FALSE, /* pc_relative */
1218 0, /* bitpos */
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 */
1226
1227 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */
1228 16, /* rightshift */
1229 2, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
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 */
1240
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) */
1245 12, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
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 */
1255
1256 /* Unsigned 12 bit byte offset to module TLS base address. */
1257 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12), /* type */
1258 0, /* rightshift */
1259 2, /* size (0 = byte, 1 = short, 2 = long) */
1260 12, /* bitsize */
1261 FALSE, /* pc_relative */
1262 0, /* bitpos */
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 */
1270
1271 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12. */
1272 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12_NC), /* type */
1273 0, /* rightshift */
1274 2, /* size (0 = byte, 1 = short, 2 = long) */
1275 12, /* bitsize */
1276 FALSE, /* pc_relative */
1277 0, /* bitpos */
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 */
1285
1286 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1287 HOWTO (AARCH64_R (TLSLD_ADD_LO12_NC), /* type */
1288 0, /* rightshift */
1289 2, /* size (0 = byte, 1 = short, 2 = long) */
1290 12, /* bitsize */
1291 FALSE, /* pc_relative */
1292 0, /* bitpos */
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 */
1300
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) */
1306 21, /* bitsize */
1307 TRUE, /* pc_relative */
1308 0, /* bitpos */
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 */
1316
1317 HOWTO (AARCH64_R (TLSLD_ADR_PREL21), /* type */
1318 0, /* rightshift */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1320 21, /* bitsize */
1321 TRUE, /* pc_relative */
1322 0, /* bitpos */
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 */
1330
1331 /* LD/ST16: bit[11:1] of byte offset to module TLS base address. */
1332 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12), /* type */
1333 1, /* rightshift */
1334 2, /* size (0 = byte, 1 = short, 2 = long) */
1335 11, /* bitsize */
1336 FALSE, /* pc_relative */
1337 10, /* bitpos */
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 */
1345
1346 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12, but no overflow check. */
1347 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12_NC), /* type */
1348 1, /* rightshift */
1349 2, /* size (0 = byte, 1 = short, 2 = long) */
1350 11, /* bitsize */
1351 FALSE, /* pc_relative */
1352 10, /* bitpos */
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 */
1360
1361 /* LD/ST32: bit[11:2] of byte offset to module TLS base address. */
1362 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12), /* type */
1363 2, /* rightshift */
1364 2, /* size (0 = byte, 1 = short, 2 = long) */
1365 10, /* bitsize */
1366 FALSE, /* pc_relative */
1367 10, /* bitpos */
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 */
1375
1376 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12, but no overflow check. */
1377 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12_NC), /* type */
1378 2, /* rightshift */
1379 2, /* size (0 = byte, 1 = short, 2 = long) */
1380 10, /* bitsize */
1381 FALSE, /* pc_relative */
1382 10, /* bitpos */
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 */
1390
1391 /* LD/ST64: bit[11:3] of byte offset to module TLS base address. */
1392 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12), /* type */
1393 3, /* rightshift */
1394 2, /* size (0 = byte, 1 = short, 2 = long) */
1395 9, /* bitsize */
1396 FALSE, /* pc_relative */
1397 10, /* bitpos */
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 */
1405
1406 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12, but no overflow check. */
1407 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12_NC), /* type */
1408 3, /* rightshift */
1409 2, /* size (0 = byte, 1 = short, 2 = long) */
1410 9, /* bitsize */
1411 FALSE, /* pc_relative */
1412 10, /* bitpos */
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 */
1420
1421 /* LD/ST8: bit[11:0] of byte offset to module TLS base address. */
1422 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12), /* type */
1423 0, /* rightshift */
1424 2, /* size (0 = byte, 1 = short, 2 = long) */
1425 12, /* bitsize */
1426 FALSE, /* pc_relative */
1427 10, /* bitpos */
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 */
1435
1436 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12, but no overflow check. */
1437 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12_NC), /* type */
1438 0, /* rightshift */
1439 2, /* size (0 = byte, 1 = short, 2 = long) */
1440 12, /* bitsize */
1441 FALSE, /* pc_relative */
1442 10, /* bitpos */
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 */
1450
1451 /* MOVZ: bit[15:0] of byte offset to module TLS base address. */
1452 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0), /* type */
1453 0, /* rightshift */
1454 2, /* size (0 = byte, 1 = short, 2 = long) */
1455 16, /* bitsize */
1456 FALSE, /* pc_relative */
1457 0, /* bitpos */
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 */
1465
1466 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0. */
1467 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0_NC), /* type */
1468 0, /* rightshift */
1469 2, /* size (0 = byte, 1 = short, 2 = long) */
1470 16, /* bitsize */
1471 FALSE, /* pc_relative */
1472 0, /* bitpos */
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 */
1480
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) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
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 */
1495
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) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
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 */
1510
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) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
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 */
1525
1526 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */
1527 32, /* rightshift */
1528 2, /* size (0 = byte, 1 = short, 2 = long) */
1529 16, /* bitsize */
1530 FALSE, /* pc_relative */
1531 0, /* bitpos */
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 */
1539
1540 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */
1541 16, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
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 */
1553
1554 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */
1555 16, /* rightshift */
1556 2, /* size (0 = byte, 1 = short, 2 = long) */
1557 16, /* bitsize */
1558 FALSE, /* pc_relative */
1559 0, /* bitpos */
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 */
1567
1568 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */
1569 0, /* rightshift */
1570 2, /* size (0 = byte, 1 = short, 2 = long) */
1571 16, /* bitsize */
1572 FALSE, /* pc_relative */
1573 0, /* bitpos */
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 */
1581
1582 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */
1583 0, /* rightshift */
1584 2, /* size (0 = byte, 1 = short, 2 = long) */
1585 16, /* bitsize */
1586 FALSE, /* pc_relative */
1587 0, /* bitpos */
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 */
1595
1596 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */
1597 12, /* rightshift */
1598 2, /* size (0 = byte, 1 = short, 2 = long) */
1599 12, /* bitsize */
1600 FALSE, /* pc_relative */
1601 0, /* bitpos */
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 */
1609
1610 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */
1611 0, /* rightshift */
1612 2, /* size (0 = byte, 1 = short, 2 = long) */
1613 12, /* bitsize */
1614 FALSE, /* pc_relative */
1615 0, /* bitpos */
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 */
1623
1624 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */
1625 0, /* rightshift */
1626 2, /* size (0 = byte, 1 = short, 2 = long) */
1627 12, /* bitsize */
1628 FALSE, /* pc_relative */
1629 0, /* bitpos */
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 */
1637
1638 HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */
1639 2, /* rightshift */
1640 2, /* size (0 = byte, 1 = short, 2 = long) */
1641 19, /* bitsize */
1642 TRUE, /* pc_relative */
1643 0, /* bitpos */
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 */
1651
1652 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */
1653 0, /* rightshift */
1654 2, /* size (0 = byte, 1 = short, 2 = long) */
1655 21, /* bitsize */
1656 TRUE, /* pc_relative */
1657 0, /* bitpos */
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 */
1665
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) */
1671 21, /* bitsize */
1672 TRUE, /* pc_relative */
1673 0, /* bitpos */
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 */
1681
1682 /* LD64: GOT offset G(S) & 0xff8. */
1683 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12), /* type */
1684 3, /* rightshift */
1685 2, /* size (0 = byte, 1 = short, 2 = long) */
1686 12, /* bitsize */
1687 FALSE, /* pc_relative */
1688 0, /* bitpos */
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 */
1696
1697 /* LD32: GOT offset G(S) & 0xffc. */
1698 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */
1699 2, /* rightshift */
1700 2, /* size (0 = byte, 1 = short, 2 = long) */
1701 12, /* bitsize */
1702 FALSE, /* pc_relative */
1703 0, /* bitpos */
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 */
1711
1712 /* ADD: GOT offset G(S) & 0xfff. */
1713 HOWTO (AARCH64_R (TLSDESC_ADD_LO12), /* type */
1714 0, /* rightshift */
1715 2, /* size (0 = byte, 1 = short, 2 = long) */
1716 12, /* bitsize */
1717 FALSE, /* pc_relative */
1718 0, /* bitpos */
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 */
1726
1727 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */
1728 16, /* rightshift */
1729 2, /* size (0 = byte, 1 = short, 2 = long) */
1730 12, /* bitsize */
1731 FALSE, /* pc_relative */
1732 0, /* bitpos */
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 */
1740
1741 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */
1742 0, /* rightshift */
1743 2, /* size (0 = byte, 1 = short, 2 = long) */
1744 12, /* bitsize */
1745 FALSE, /* pc_relative */
1746 0, /* bitpos */
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 */
1754
1755 HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */
1756 0, /* rightshift */
1757 2, /* size (0 = byte, 1 = short, 2 = long) */
1758 12, /* bitsize */
1759 FALSE, /* pc_relative */
1760 0, /* bitpos */
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 */
1765 0x0, /* src_mask */
1766 0x0, /* dst_mask */
1767 FALSE), /* pcrel_offset */
1768
1769 HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */
1770 0, /* rightshift */
1771 2, /* size (0 = byte, 1 = short, 2 = long) */
1772 12, /* bitsize */
1773 FALSE, /* pc_relative */
1774 0, /* bitpos */
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 */
1779 0x0, /* src_mask */
1780 0x0, /* dst_mask */
1781 FALSE), /* pcrel_offset */
1782
1783 HOWTO (AARCH64_R (TLSDESC_CALL), /* type */
1784 0, /* rightshift */
1785 2, /* size (0 = byte, 1 = short, 2 = long) */
1786 0, /* bitsize */
1787 FALSE, /* pc_relative */
1788 0, /* bitpos */
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 */
1793 0x0, /* src_mask */
1794 0x0, /* dst_mask */
1795 FALSE), /* pcrel_offset */
1796
1797 HOWTO (AARCH64_R (COPY), /* type */
1798 0, /* rightshift */
1799 2, /* size (0 = byte, 1 = short, 2 = long) */
1800 64, /* bitsize */
1801 FALSE, /* pc_relative */
1802 0, /* bitpos */
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 */
1810
1811 HOWTO (AARCH64_R (GLOB_DAT), /* type */
1812 0, /* rightshift */
1813 2, /* size (0 = byte, 1 = short, 2 = long) */
1814 64, /* bitsize */
1815 FALSE, /* pc_relative */
1816 0, /* bitpos */
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 */
1824
1825 HOWTO (AARCH64_R (JUMP_SLOT), /* type */
1826 0, /* rightshift */
1827 2, /* size (0 = byte, 1 = short, 2 = long) */
1828 64, /* bitsize */
1829 FALSE, /* pc_relative */
1830 0, /* bitpos */
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 */
1838
1839 HOWTO (AARCH64_R (RELATIVE), /* type */
1840 0, /* rightshift */
1841 2, /* size (0 = byte, 1 = short, 2 = long) */
1842 64, /* bitsize */
1843 FALSE, /* pc_relative */
1844 0, /* bitpos */
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 */
1852
1853 HOWTO (AARCH64_R (TLS_DTPMOD), /* type */
1854 0, /* rightshift */
1855 2, /* size (0 = byte, 1 = short, 2 = long) */
1856 64, /* bitsize */
1857 FALSE, /* pc_relative */
1858 0, /* bitpos */
1859 complain_overflow_dont, /* complain_on_overflow */
1860 bfd_elf_generic_reloc, /* special_function */
1861 #if ARCH_SIZE == 64
1862 AARCH64_R_STR (TLS_DTPMOD64), /* name */
1863 #else
1864 AARCH64_R_STR (TLS_DTPMOD), /* name */
1865 #endif
1866 FALSE, /* partial_inplace */
1867 0, /* src_mask */
1868 ALL_ONES, /* dst_mask */
1869 FALSE), /* pc_reloffset */
1870
1871 HOWTO (AARCH64_R (TLS_DTPREL), /* type */
1872 0, /* rightshift */
1873 2, /* size (0 = byte, 1 = short, 2 = long) */
1874 64, /* bitsize */
1875 FALSE, /* pc_relative */
1876 0, /* bitpos */
1877 complain_overflow_dont, /* complain_on_overflow */
1878 bfd_elf_generic_reloc, /* special_function */
1879 #if ARCH_SIZE == 64
1880 AARCH64_R_STR (TLS_DTPREL64), /* name */
1881 #else
1882 AARCH64_R_STR (TLS_DTPREL), /* name */
1883 #endif
1884 FALSE, /* partial_inplace */
1885 0, /* src_mask */
1886 ALL_ONES, /* dst_mask */
1887 FALSE), /* pcrel_offset */
1888
1889 HOWTO (AARCH64_R (TLS_TPREL), /* type */
1890 0, /* rightshift */
1891 2, /* size (0 = byte, 1 = short, 2 = long) */
1892 64, /* bitsize */
1893 FALSE, /* pc_relative */
1894 0, /* bitpos */
1895 complain_overflow_dont, /* complain_on_overflow */
1896 bfd_elf_generic_reloc, /* special_function */
1897 #if ARCH_SIZE == 64
1898 AARCH64_R_STR (TLS_TPREL64), /* name */
1899 #else
1900 AARCH64_R_STR (TLS_TPREL), /* name */
1901 #endif
1902 FALSE, /* partial_inplace */
1903 0, /* src_mask */
1904 ALL_ONES, /* dst_mask */
1905 FALSE), /* pcrel_offset */
1906
1907 HOWTO (AARCH64_R (TLSDESC), /* type */
1908 0, /* rightshift */
1909 2, /* size (0 = byte, 1 = short, 2 = long) */
1910 64, /* bitsize */
1911 FALSE, /* pc_relative */
1912 0, /* bitpos */
1913 complain_overflow_dont, /* complain_on_overflow */
1914 bfd_elf_generic_reloc, /* special_function */
1915 AARCH64_R_STR (TLSDESC), /* name */
1916 FALSE, /* partial_inplace */
1917 0, /* src_mask */
1918 ALL_ONES, /* dst_mask */
1919 FALSE), /* pcrel_offset */
1920
1921 HOWTO (AARCH64_R (IRELATIVE), /* type */
1922 0, /* rightshift */
1923 2, /* size (0 = byte, 1 = short, 2 = long) */
1924 64, /* bitsize */
1925 FALSE, /* pc_relative */
1926 0, /* bitpos */
1927 complain_overflow_bitfield, /* complain_on_overflow */
1928 bfd_elf_generic_reloc, /* special_function */
1929 AARCH64_R_STR (IRELATIVE), /* name */
1930 FALSE, /* partial_inplace */
1931 0, /* src_mask */
1932 ALL_ONES, /* dst_mask */
1933 FALSE), /* pcrel_offset */
1934
1935 EMPTY_HOWTO (0),
1936 };
1937
1938 static reloc_howto_type elfNN_aarch64_howto_none =
1939 HOWTO (R_AARCH64_NONE, /* type */
1940 0, /* rightshift */
1941 3, /* size (0 = byte, 1 = short, 2 = long) */
1942 0, /* bitsize */
1943 FALSE, /* pc_relative */
1944 0, /* bitpos */
1945 complain_overflow_dont,/* complain_on_overflow */
1946 bfd_elf_generic_reloc, /* special_function */
1947 "R_AARCH64_NONE", /* name */
1948 FALSE, /* partial_inplace */
1949 0, /* src_mask */
1950 0, /* dst_mask */
1951 FALSE); /* pcrel_offset */
1952
1953 /* Given HOWTO, return the bfd internal relocation enumerator. */
1954
1955 static bfd_reloc_code_real_type
1956 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto)
1957 {
1958 const int size
1959 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table);
1960 const ptrdiff_t offset
1961 = howto - elfNN_aarch64_howto_table;
1962
1963 if (offset > 0 && offset < size - 1)
1964 return BFD_RELOC_AARCH64_RELOC_START + offset;
1965
1966 if (howto == &elfNN_aarch64_howto_none)
1967 return BFD_RELOC_AARCH64_NONE;
1968
1969 return BFD_RELOC_AARCH64_RELOC_START;
1970 }
1971
1972 /* Given R_TYPE, return the bfd internal relocation enumerator. */
1973
1974 static bfd_reloc_code_real_type
1975 elfNN_aarch64_bfd_reloc_from_type (bfd *abfd, unsigned int r_type)
1976 {
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];
1980
1981 if (!initialized_p)
1982 {
1983 unsigned int i;
1984
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;
1988
1989 initialized_p = TRUE;
1990 }
1991
1992 if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL)
1993 return BFD_RELOC_AARCH64_NONE;
1994
1995 /* PR 17512: file: b371e70a. */
1996 if (r_type >= R_AARCH64_end)
1997 {
1998 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
1999 abfd, r_type);
2000 bfd_set_error (bfd_error_bad_value);
2001 return BFD_RELOC_AARCH64_NONE;
2002 }
2003
2004 return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type];
2005 }
2006
2007 struct elf_aarch64_reloc_map
2008 {
2009 bfd_reloc_code_real_type from;
2010 bfd_reloc_code_real_type to;
2011 };
2012
2013 /* Map bfd generic reloc to AArch64-specific reloc. */
2014 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] =
2015 {
2016 {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE},
2017
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},
2026 };
2027
2028 /* Given the bfd internal relocation enumerator in CODE, return the
2029 corresponding howto entry. */
2030
2031 static reloc_howto_type *
2032 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code)
2033 {
2034 unsigned int i;
2035
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)
2041 {
2042 code = elf_aarch64_reloc_map[i].to;
2043 break;
2044 }
2045
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];
2050
2051 if (code == BFD_RELOC_AARCH64_NONE)
2052 return &elfNN_aarch64_howto_none;
2053
2054 return NULL;
2055 }
2056
2057 static reloc_howto_type *
2058 elfNN_aarch64_howto_from_type (bfd *abfd, unsigned int r_type)
2059 {
2060 bfd_reloc_code_real_type val;
2061 reloc_howto_type *howto;
2062
2063 #if ARCH_SIZE == 32
2064 if (r_type > 256)
2065 {
2066 bfd_set_error (bfd_error_bad_value);
2067 return NULL;
2068 }
2069 #endif
2070
2071 if (r_type == R_AARCH64_NONE)
2072 return &elfNN_aarch64_howto_none;
2073
2074 val = elfNN_aarch64_bfd_reloc_from_type (abfd, r_type);
2075 howto = elfNN_aarch64_howto_from_bfd_reloc (val);
2076
2077 if (howto != NULL)
2078 return howto;
2079
2080 bfd_set_error (bfd_error_bad_value);
2081 return NULL;
2082 }
2083
2084 static bfd_boolean
2085 elfNN_aarch64_info_to_howto (bfd *abfd, arelent *bfd_reloc,
2086 Elf_Internal_Rela *elf_reloc)
2087 {
2088 unsigned int r_type;
2089
2090 r_type = ELFNN_R_TYPE (elf_reloc->r_info);
2091 bfd_reloc->howto = elfNN_aarch64_howto_from_type (abfd, r_type);
2092
2093 if (bfd_reloc->howto == NULL)
2094 {
2095 /* xgettext:c-format */
2096 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, r_type);
2097 return FALSE;
2098 }
2099 return TRUE;
2100 }
2101
2102 static reloc_howto_type *
2103 elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2104 bfd_reloc_code_real_type code)
2105 {
2106 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code);
2107
2108 if (howto != NULL)
2109 return howto;
2110
2111 bfd_set_error (bfd_error_bad_value);
2112 return NULL;
2113 }
2114
2115 static reloc_howto_type *
2116 elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2117 const char *r_name)
2118 {
2119 unsigned int i;
2120
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];
2125
2126 return NULL;
2127 }
2128
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"
2133
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"
2139
2140 /* The name of the dynamic interpreter. This is put in the .interp
2141 section. */
2142 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
2143
2144 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
2145 (((1 << 25) - 1) << 2)
2146 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
2147 (-((1 << 25) << 2))
2148
2149 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
2150 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
2151
2152 static int
2153 aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place)
2154 {
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;
2157 }
2158
2159 static int
2160 aarch64_valid_branch_p (bfd_vma value, bfd_vma place)
2161 {
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);
2165 }
2166
2167 static const uint32_t aarch64_adrp_branch_stub [] =
2168 {
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 */
2174 };
2175
2176 static const uint32_t aarch64_long_branch_stub[] =
2177 {
2178 #if ARCH_SIZE == 64
2179 0x58000090, /* ldr ip0, 1f */
2180 #else
2181 0x18000090, /* ldr wip0, 1f */
2182 #endif
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
2188 */
2189 0x00000000,
2190 };
2191
2192 static const uint32_t aarch64_erratum_835769_stub[] =
2193 {
2194 0x00000000, /* Placeholder for multiply accumulate. */
2195 0x14000000, /* b <label> */
2196 };
2197
2198 static const uint32_t aarch64_erratum_843419_stub[] =
2199 {
2200 0x00000000, /* Placeholder for LDR instruction. */
2201 0x14000000, /* b <label> */
2202 };
2203
2204 /* Section name for stubs is the associated section name plus this
2205 string. */
2206 #define STUB_SUFFIX ".stub"
2207
2208 enum elf_aarch64_stub_type
2209 {
2210 aarch64_stub_none,
2211 aarch64_stub_adrp_branch,
2212 aarch64_stub_long_branch,
2213 aarch64_stub_erratum_835769_veneer,
2214 aarch64_stub_erratum_843419_veneer,
2215 };
2216
2217 struct elf_aarch64_stub_hash_entry
2218 {
2219 /* Base hash table entry structure. */
2220 struct bfd_hash_entry root;
2221
2222 /* The stub section. */
2223 asection *stub_sec;
2224
2225 /* Offset within stub_sec of the beginning of this stub. */
2226 bfd_vma stub_offset;
2227
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;
2232
2233 enum elf_aarch64_stub_type stub_type;
2234
2235 /* The symbol table entry, if any, that this was derived from. */
2236 struct elf_aarch64_link_hash_entry *h;
2237
2238 /* Destination symbol type */
2239 unsigned char st_type;
2240
2241 /* Where this stub is being called from, or, in the case of combined
2242 stub sections, the first input section in the group. */
2243 asection *id_sec;
2244
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. */
2248 char *output_name;
2249
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;
2253
2254 /* In an erratum 843419 workaround stub, the ADRP instruction offset. */
2255 bfd_vma adrp_offset;
2256 };
2257
2258 /* Used to build a map of a section. This is required for mixed-endian
2259 code/data. */
2260
2261 typedef struct elf_elf_section_map
2262 {
2263 bfd_vma vma;
2264 char type;
2265 }
2266 elf_aarch64_section_map;
2267
2268
2269 typedef struct _aarch64_elf_section_data
2270 {
2271 struct bfd_elf_section_data elf;
2272 unsigned int mapcount;
2273 unsigned int mapsize;
2274 elf_aarch64_section_map *map;
2275 }
2276 _aarch64_elf_section_data;
2277
2278 #define elf_aarch64_section_data(sec) \
2279 ((_aarch64_elf_section_data *) elf_section_data (sec))
2280
2281 /* The size of the thread control block which is defined to be two pointers. */
2282 #define TCB_SIZE (ARCH_SIZE/8)*2
2283
2284 struct elf_aarch64_local_symbol
2285 {
2286 unsigned int got_type;
2287 bfd_signed_vma got_refcount;
2288 bfd_vma got_offset;
2289
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
2292 within the PLTGOT.
2293
2294 The magic value (bfd_vma) -1 indicates that an offset has not be
2295 allocated. */
2296 bfd_vma tlsdesc_got_jump_table_offset;
2297 };
2298
2299 struct elf_aarch64_obj_tdata
2300 {
2301 struct elf_obj_tdata root;
2302
2303 /* local symbol descriptors */
2304 struct elf_aarch64_local_symbol *locals;
2305
2306 /* Zero to warn when linking objects with incompatible enum sizes. */
2307 int no_enum_size_warning;
2308
2309 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2310 int no_wchar_size_warning;
2311 };
2312
2313 #define elf_aarch64_tdata(bfd) \
2314 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
2315
2316 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
2317
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)
2322
2323 static bfd_boolean
2324 elfNN_aarch64_mkobject (bfd *abfd)
2325 {
2326 return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata),
2327 AARCH64_ELF_DATA);
2328 }
2329
2330 #define elf_aarch64_hash_entry(ent) \
2331 ((struct elf_aarch64_link_hash_entry *)(ent))
2332
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
2338
2339 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
2340
2341 /* AArch64 ELF linker hash entry. */
2342 struct elf_aarch64_link_hash_entry
2343 {
2344 struct elf_link_hash_entry root;
2345
2346 /* Track dynamic relocs copied for this symbol. */
2347 struct elf_dyn_relocs *dyn_relocs;
2348
2349 /* Since PLT entries have variable size, we need to record the
2350 index into .got.plt instead of recomputing it from the PLT
2351 offset. */
2352 bfd_signed_vma plt_got_offset;
2353
2354 /* Bit mask representing the type of GOT entry(s) if any required by
2355 this symbol. */
2356 unsigned int got_type;
2357
2358 /* A pointer to the most recently used stub hash entry against this
2359 symbol. */
2360 struct elf_aarch64_stub_hash_entry *stub_cache;
2361
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.
2364
2365 The magic value (bfd_vma) -1 indicates that an offset has not
2366 be allocated. */
2367 bfd_vma tlsdesc_got_jump_table_offset;
2368 };
2369
2370 static unsigned int
2371 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h,
2372 bfd *abfd,
2373 unsigned long r_symndx)
2374 {
2375 if (h)
2376 return elf_aarch64_hash_entry (h)->got_type;
2377
2378 if (! elf_aarch64_locals (abfd))
2379 return GOT_UNKNOWN;
2380
2381 return elf_aarch64_locals (abfd)[r_symndx].got_type;
2382 }
2383
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))
2387
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)))
2391
2392 /* AArch64 ELF linker hash table. */
2393 struct elf_aarch64_link_hash_table
2394 {
2395 /* The main hash table. */
2396 struct elf_link_hash_table root;
2397
2398 /* Nonzero to force PIC branch veneers. */
2399 int pic_veneer;
2400
2401 /* Fix erratum 835769. */
2402 int fix_erratum_835769;
2403
2404 /* Fix erratum 843419. */
2405 int fix_erratum_843419;
2406
2407 /* Enable ADRP->ADR rewrite for erratum 843419 workaround. */
2408 int fix_erratum_843419_adr;
2409
2410 /* Don't apply link-time values for dynamic relocations. */
2411 int no_apply_dynamic_relocs;
2412
2413 /* The number of bytes in the initial entry in the PLT. */
2414 bfd_size_type plt_header_size;
2415
2416 /* The number of bytes in the subsequent PLT etries. */
2417 bfd_size_type plt_entry_size;
2418
2419 /* Small local sym cache. */
2420 struct sym_cache sym_cache;
2421
2422 /* For convenience in allocate_dynrelocs. */
2423 bfd *obfd;
2424
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;
2428
2429 /* The stub hash table. */
2430 struct bfd_hash_table stub_hash_table;
2431
2432 /* Linker stub bfd. */
2433 bfd *stub_bfd;
2434
2435 /* Linker call-backs. */
2436 asection *(*add_stub_section) (const char *, asection *);
2437 void (*layout_sections_again) (void);
2438
2439 /* Array to keep track of which stub sections have been created, and
2440 information on stub grouping. */
2441 struct map_stub
2442 {
2443 /* This is the section to which stubs in the group will be
2444 attached. */
2445 asection *link_sec;
2446 /* The stub section. */
2447 asection *stub_sec;
2448 } *stub_group;
2449
2450 /* Assorted information used by elfNN_aarch64_size_stubs. */
2451 unsigned int bfd_count;
2452 unsigned int top_index;
2453 asection **input_list;
2454
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
2458 yet. */
2459 bfd_vma tlsdesc_plt;
2460
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;
2465
2466 /* Used by local STT_GNU_IFUNC symbols. */
2467 htab_t loc_hash_table;
2468 void * loc_hash_memory;
2469 };
2470
2471 /* Create an entry in an AArch64 ELF linker hash table. */
2472
2473 static struct bfd_hash_entry *
2474 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry,
2475 struct bfd_hash_table *table,
2476 const char *string)
2477 {
2478 struct elf_aarch64_link_hash_entry *ret =
2479 (struct elf_aarch64_link_hash_entry *) entry;
2480
2481 /* Allocate the structure if it has not already been allocated by a
2482 subclass. */
2483 if (ret == NULL)
2484 ret = bfd_hash_allocate (table,
2485 sizeof (struct elf_aarch64_link_hash_entry));
2486 if (ret == NULL)
2487 return (struct bfd_hash_entry *) ret;
2488
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,
2492 table, string));
2493 if (ret != NULL)
2494 {
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;
2500 }
2501
2502 return (struct bfd_hash_entry *) ret;
2503 }
2504
2505 /* Initialize an entry in the stub hash table. */
2506
2507 static struct bfd_hash_entry *
2508 stub_hash_newfunc (struct bfd_hash_entry *entry,
2509 struct bfd_hash_table *table, const char *string)
2510 {
2511 /* Allocate the structure if it has not already been allocated by a
2512 subclass. */
2513 if (entry == NULL)
2514 {
2515 entry = bfd_hash_allocate (table,
2516 sizeof (struct
2517 elf_aarch64_stub_hash_entry));
2518 if (entry == NULL)
2519 return entry;
2520 }
2521
2522 /* Call the allocation method of the superclass. */
2523 entry = bfd_hash_newfunc (entry, table, string);
2524 if (entry != NULL)
2525 {
2526 struct elf_aarch64_stub_hash_entry *eh;
2527
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;
2536 eh->h = NULL;
2537 eh->id_sec = NULL;
2538 }
2539
2540 return entry;
2541 }
2542
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. */
2547
2548 static hashval_t
2549 elfNN_aarch64_local_htab_hash (const void *ptr)
2550 {
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);
2554 }
2555
2556 /* Compare local hash entries. */
2557
2558 static int
2559 elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2)
2560 {
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;
2565
2566 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
2567 }
2568
2569 /* Find and/or create a hash entry for local symbol. */
2570
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,
2574 bfd_boolean create)
2575 {
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));
2580 void **slot;
2581
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);
2586
2587 if (!slot)
2588 return NULL;
2589
2590 if (*slot)
2591 {
2592 ret = (struct elf_aarch64_link_hash_entry *) *slot;
2593 return &ret->root;
2594 }
2595
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));
2599 if (ret)
2600 {
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;
2605 *slot = ret;
2606 }
2607 return &ret->root;
2608 }
2609
2610 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2611
2612 static void
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)
2616 {
2617 struct elf_aarch64_link_hash_entry *edir, *eind;
2618
2619 edir = (struct elf_aarch64_link_hash_entry *) dir;
2620 eind = (struct elf_aarch64_link_hash_entry *) ind;
2621
2622 if (eind->dyn_relocs != NULL)
2623 {
2624 if (edir->dyn_relocs != NULL)
2625 {
2626 struct elf_dyn_relocs **pp;
2627 struct elf_dyn_relocs *p;
2628
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;)
2632 {
2633 struct elf_dyn_relocs *q;
2634
2635 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2636 if (q->sec == p->sec)
2637 {
2638 q->pc_count += p->pc_count;
2639 q->count += p->count;
2640 *pp = p->next;
2641 break;
2642 }
2643 if (q == NULL)
2644 pp = &p->next;
2645 }
2646 *pp = edir->dyn_relocs;
2647 }
2648
2649 edir->dyn_relocs = eind->dyn_relocs;
2650 eind->dyn_relocs = NULL;
2651 }
2652
2653 if (ind->root.type == bfd_link_hash_indirect)
2654 {
2655 /* Copy over PLT info. */
2656 if (dir->got.refcount <= 0)
2657 {
2658 edir->got_type = eind->got_type;
2659 eind->got_type = GOT_UNKNOWN;
2660 }
2661 }
2662
2663 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2664 }
2665
2666 /* Destroy an AArch64 elf linker hash table. */
2667
2668 static void
2669 elfNN_aarch64_link_hash_table_free (bfd *obfd)
2670 {
2671 struct elf_aarch64_link_hash_table *ret
2672 = (struct elf_aarch64_link_hash_table *) obfd->link.hash;
2673
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);
2678
2679 bfd_hash_table_free (&ret->stub_hash_table);
2680 _bfd_elf_link_hash_table_free (obfd);
2681 }
2682
2683 /* Create an AArch64 elf linker hash table. */
2684
2685 static struct bfd_link_hash_table *
2686 elfNN_aarch64_link_hash_table_create (bfd *abfd)
2687 {
2688 struct elf_aarch64_link_hash_table *ret;
2689 bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table);
2690
2691 ret = bfd_zmalloc (amt);
2692 if (ret == NULL)
2693 return NULL;
2694
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))
2698 {
2699 free (ret);
2700 return NULL;
2701 }
2702
2703 ret->plt_header_size = PLT_ENTRY_SIZE;
2704 ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE;
2705 ret->obfd = abfd;
2706 ret->dt_tlsdesc_got = (bfd_vma) - 1;
2707
2708 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2709 sizeof (struct elf_aarch64_stub_hash_entry)))
2710 {
2711 _bfd_elf_link_hash_table_free (abfd);
2712 return NULL;
2713 }
2714
2715 ret->loc_hash_table = htab_try_create (1024,
2716 elfNN_aarch64_local_htab_hash,
2717 elfNN_aarch64_local_htab_eq,
2718 NULL);
2719 ret->loc_hash_memory = objalloc_create ();
2720 if (!ret->loc_hash_table || !ret->loc_hash_memory)
2721 {
2722 elfNN_aarch64_link_hash_table_free (abfd);
2723 return NULL;
2724 }
2725 ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free;
2726
2727 return &ret->root.root;
2728 }
2729
2730 /* Perform relocation R_TYPE. Returns TRUE upon success, FALSE otherwise. */
2731
2732 static bfd_boolean
2733 aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section,
2734 bfd_vma offset, bfd_vma value)
2735 {
2736 reloc_howto_type *howto;
2737 bfd_vma place;
2738
2739 howto = elfNN_aarch64_howto_from_type (input_bfd, r_type);
2740 place = (input_section->output_section->vma + input_section->output_offset
2741 + offset);
2742
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;
2748 }
2749
2750 static enum elf_aarch64_stub_type
2751 aarch64_select_branch_stub (bfd_vma value, bfd_vma place)
2752 {
2753 if (aarch64_valid_for_adrp_p (value, place))
2754 return aarch64_stub_adrp_branch;
2755 return aarch64_stub_long_branch;
2756 }
2757
2758 /* Determine the type of stub needed, if any, for a call. */
2759
2760 static enum elf_aarch64_stub_type
2761 aarch64_type_of_stub (asection *input_sec,
2762 const Elf_Internal_Rela *rel,
2763 asection *sym_sec,
2764 unsigned char st_type,
2765 bfd_vma destination)
2766 {
2767 bfd_vma location;
2768 bfd_signed_vma branch_offset;
2769 unsigned int r_type;
2770 enum elf_aarch64_stub_type stub_type = aarch64_stub_none;
2771
2772 if (st_type != STT_FUNC
2773 && (sym_sec == input_sec))
2774 return stub_type;
2775
2776 /* Determine where the call point is. */
2777 location = (input_sec->output_offset
2778 + input_sec->output_section->vma + rel->r_offset);
2779
2780 branch_offset = (bfd_signed_vma) (destination - location);
2781
2782 r_type = ELFNN_R_TYPE (rel->r_info);
2783
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))
2790 {
2791 stub_type = aarch64_stub_long_branch;
2792 }
2793
2794 return stub_type;
2795 }
2796
2797 /* Build a name for an entry in the stub hash table. */
2798
2799 static char *
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)
2804 {
2805 char *stub_name;
2806 bfd_size_type len;
2807
2808 if (hash)
2809 {
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,
2816 rel->r_addend);
2817 }
2818 else
2819 {
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),
2827 rel->r_addend);
2828 }
2829
2830 return stub_name;
2831 }
2832
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. */
2836
2837 static bfd_boolean
2838 elf_aarch64_hash_symbol (struct elf_link_hash_entry *h)
2839 {
2840 if (h->plt.offset != (bfd_vma) -1
2841 && !h->def_regular
2842 && !h->pointer_equality_needed)
2843 return FALSE;
2844
2845 return _bfd_elf_hash_symbol (h);
2846 }
2847
2848
2849 /* Look up an entry in the stub hash. Stub entries are cached because
2850 creating the stub name takes a bit of time. */
2851
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)
2858 {
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;
2863
2864 if ((input_section->flags & SEC_CODE) == 0)
2865 return NULL;
2866
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;
2873
2874 if (h != NULL && h->stub_cache != NULL
2875 && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec)
2876 {
2877 stub_entry = h->stub_cache;
2878 }
2879 else
2880 {
2881 char *stub_name;
2882
2883 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel);
2884 if (stub_name == NULL)
2885 return NULL;
2886
2887 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
2888 stub_name, FALSE, FALSE);
2889 if (h != NULL)
2890 h->stub_cache = stub_entry;
2891
2892 free (stub_name);
2893 }
2894
2895 return stub_entry;
2896 }
2897
2898
2899 /* Create a stub section. */
2900
2901 static asection *
2902 _bfd_aarch64_create_stub_section (asection *section,
2903 struct elf_aarch64_link_hash_table *htab)
2904 {
2905 size_t namelen;
2906 bfd_size_type len;
2907 char *s_name;
2908
2909 namelen = strlen (section->name);
2910 len = namelen + sizeof (STUB_SUFFIX);
2911 s_name = bfd_alloc (htab->stub_bfd, len);
2912 if (s_name == NULL)
2913 return NULL;
2914
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);
2918 }
2919
2920
2921 /* Find or create a stub section for a link section.
2922
2923 Fix or create the stub section used to collect stubs attached to
2924 the specified link section. */
2925
2926 static asection *
2927 _bfd_aarch64_get_stub_for_link_section (asection *link_section,
2928 struct elf_aarch64_link_hash_table *htab)
2929 {
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;
2934 }
2935
2936
2937 /* Find or create a stub section in the stub group for an input
2938 section. */
2939
2940 static asection *
2941 _bfd_aarch64_create_or_find_stub_sec (asection *section,
2942 struct elf_aarch64_link_hash_table *htab)
2943 {
2944 asection *link_sec = htab->stub_group[section->id].link_sec;
2945 return _bfd_aarch64_get_stub_for_link_section (link_sec, htab);
2946 }
2947
2948
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
2951 initialised. */
2952
2953 static struct elf_aarch64_stub_hash_entry *
2954 _bfd_aarch64_add_stub_entry_in_group (const char *stub_name,
2955 asection *section,
2956 struct elf_aarch64_link_hash_table *htab)
2957 {
2958 asection *link_sec;
2959 asection *stub_sec;
2960 struct elf_aarch64_stub_hash_entry *stub_entry;
2961
2962 link_sec = htab->stub_group[section->id].link_sec;
2963 stub_sec = _bfd_aarch64_create_or_find_stub_sec (section, htab);
2964
2965 /* Enter this entry into the linker stub hash table. */
2966 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2967 TRUE, FALSE);
2968 if (stub_entry == NULL)
2969 {
2970 /* xgettext:c-format */
2971 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
2972 section->owner, stub_name);
2973 return NULL;
2974 }
2975
2976 stub_entry->stub_sec = stub_sec;
2977 stub_entry->stub_offset = 0;
2978 stub_entry->id_sec = link_sec;
2979
2980 return stub_entry;
2981 }
2982
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. */
2985
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)
2990 {
2991 asection *stub_sec;
2992 struct elf_aarch64_stub_hash_entry *stub_entry;
2993
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,
2996 TRUE, FALSE);
2997 if (stub_entry == NULL)
2998 {
2999 _bfd_error_handler (_("cannot create stub entry %s"), stub_name);
3000 return NULL;
3001 }
3002
3003 stub_entry->stub_sec = stub_sec;
3004 stub_entry->stub_offset = 0;
3005 stub_entry->id_sec = link_section;
3006
3007 return stub_entry;
3008 }
3009
3010
3011 static bfd_boolean
3012 aarch64_build_one_stub (struct bfd_hash_entry *gen_entry,
3013 void *in_arg ATTRIBUTE_UNUSED)
3014 {
3015 struct elf_aarch64_stub_hash_entry *stub_entry;
3016 asection *stub_sec;
3017 bfd *stub_bfd;
3018 bfd_byte *loc;
3019 bfd_vma sym_value;
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;
3025 unsigned int i;
3026
3027 /* Massage our args to the form they really have. */
3028 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
3029
3030 stub_sec = stub_entry->stub_sec;
3031
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;
3035
3036 stub_bfd = stub_sec->owner;
3037
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);
3042
3043 if (stub_entry->stub_type == aarch64_stub_long_branch)
3044 {
3045 bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma
3046 + stub_sec->output_offset);
3047
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);
3051 }
3052
3053 switch (stub_entry->stub_type)
3054 {
3055 case aarch64_stub_adrp_branch:
3056 template = aarch64_adrp_branch_stub;
3057 template_size = sizeof (aarch64_adrp_branch_stub);
3058 break;
3059 case aarch64_stub_long_branch:
3060 template = aarch64_long_branch_stub;
3061 template_size = sizeof (aarch64_long_branch_stub);
3062 break;
3063 case aarch64_stub_erratum_835769_veneer:
3064 template = aarch64_erratum_835769_stub;
3065 template_size = sizeof (aarch64_erratum_835769_stub);
3066 break;
3067 case aarch64_stub_erratum_843419_veneer:
3068 template = aarch64_erratum_843419_stub;
3069 template_size = sizeof (aarch64_erratum_843419_stub);
3070 break;
3071 default:
3072 abort ();
3073 }
3074
3075 for (i = 0; i < (template_size / sizeof template[0]); i++)
3076 {
3077 bfd_putl32 (template[i], loc);
3078 loc += 4;
3079 }
3080
3081 template_size = (template_size + 7) & ~7;
3082 stub_sec->size += template_size;
3083
3084 switch (stub_entry->stub_type)
3085 {
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
3090 of range. */
3091 BFD_FAIL ();
3092
3093 if (!aarch64_relocate (AARCH64_R (ADD_ABS_LO12_NC), stub_bfd, stub_sec,
3094 stub_entry->stub_offset + 4, sym_value))
3095 BFD_FAIL ();
3096 break;
3097
3098 case aarch64_stub_long_branch:
3099 /* We want the value relative to the address 12 bytes back from the
3100 value itself. */
3101 if (!aarch64_relocate (AARCH64_R (PRELNN), stub_bfd, stub_sec,
3102 stub_entry->stub_offset + 16, sym_value + 12))
3103 BFD_FAIL ();
3104 break;
3105
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);
3120 break;
3121
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))
3125 BFD_FAIL ();
3126 break;
3127
3128 default:
3129 abort ();
3130 }
3131
3132 return TRUE;
3133 }
3134
3135 /* As above, but don't actually build the stub. Just bump offset so
3136 we know stub section sizes. */
3137
3138 static bfd_boolean
3139 aarch64_size_one_stub (struct bfd_hash_entry *gen_entry,
3140 void *in_arg ATTRIBUTE_UNUSED)
3141 {
3142 struct elf_aarch64_stub_hash_entry *stub_entry;
3143 int size;
3144
3145 /* Massage our args to the form they really have. */
3146 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
3147
3148 switch (stub_entry->stub_type)
3149 {
3150 case aarch64_stub_adrp_branch:
3151 size = sizeof (aarch64_adrp_branch_stub);
3152 break;
3153 case aarch64_stub_long_branch:
3154 size = sizeof (aarch64_long_branch_stub);
3155 break;
3156 case aarch64_stub_erratum_835769_veneer:
3157 size = sizeof (aarch64_erratum_835769_stub);
3158 break;
3159 case aarch64_stub_erratum_843419_veneer:
3160 size = sizeof (aarch64_erratum_843419_stub);
3161 break;
3162 default:
3163 abort ();
3164 }
3165
3166 size = (size + 7) & ~7;
3167 stub_entry->stub_sec->size += size;
3168 return TRUE;
3169 }
3170
3171 /* External entry points for sizing and building linker stubs. */
3172
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. */
3176
3177 int
3178 elfNN_aarch64_setup_section_lists (bfd *output_bfd,
3179 struct bfd_link_info *info)
3180 {
3181 bfd *input_bfd;
3182 unsigned int bfd_count;
3183 unsigned int top_id, top_index;
3184 asection *section;
3185 asection **input_list, **list;
3186 bfd_size_type amt;
3187 struct elf_aarch64_link_hash_table *htab =
3188 elf_aarch64_hash_table (info);
3189
3190 if (!is_elf_hash_table (htab))
3191 return 0;
3192
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)
3196 {
3197 bfd_count += 1;
3198 for (section = input_bfd->sections;
3199 section != NULL; section = section->next)
3200 {
3201 if (top_id < section->id)
3202 top_id = section->id;
3203 }
3204 }
3205 htab->bfd_count = bfd_count;
3206
3207 amt = sizeof (struct map_stub) * (top_id + 1);
3208 htab->stub_group = bfd_zmalloc (amt);
3209 if (htab->stub_group == NULL)
3210 return -1;
3211
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)
3217 {
3218 if (top_index < section->index)
3219 top_index = section->index;
3220 }
3221
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)
3227 return -1;
3228
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;
3232 do
3233 *list = bfd_abs_section_ptr;
3234 while (list-- != input_list);
3235
3236 for (section = output_bfd->sections;
3237 section != NULL; section = section->next)
3238 {
3239 if ((section->flags & SEC_CODE) != 0)
3240 input_list[section->index] = NULL;
3241 }
3242
3243 return 1;
3244 }
3245
3246 /* Used by elfNN_aarch64_next_input_section and group_sections. */
3247 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3248
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. */
3253
3254 void
3255 elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec)
3256 {
3257 struct elf_aarch64_link_hash_table *htab =
3258 elf_aarch64_hash_table (info);
3259
3260 if (isec->output_section->index <= htab->top_index)
3261 {
3262 asection **list = htab->input_list + isec->output_section->index;
3263
3264 if (*list != bfd_abs_section_ptr)
3265 {
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;
3270 *list = isec;
3271 }
3272 }
3273 }
3274
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. */
3281
3282 static void
3283 group_sections (struct elf_aarch64_link_hash_table *htab,
3284 bfd_size_type stub_group_size,
3285 bfd_boolean stubs_always_before_branch)
3286 {
3287 asection **list = htab->input_list + htab->top_index;
3288
3289 do
3290 {
3291 asection *tail = *list;
3292
3293 if (tail == bfd_abs_section_ptr)
3294 continue;
3295
3296 while (tail != NULL)
3297 {
3298 asection *curr;
3299 asection *prev;
3300 bfd_size_type total;
3301
3302 curr = tail;
3303 total = tail->size;
3304 while ((prev = PREV_SEC (curr)) != NULL
3305 && ((total += curr->output_offset - prev->output_offset)
3306 < stub_group_size))
3307 curr = prev;
3308
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
3315 section size. */
3316 do
3317 {
3318 prev = PREV_SEC (tail);
3319 /* Set up this stub group. */
3320 htab->stub_group[tail->id].link_sec = curr;
3321 }
3322 while (tail != curr && (tail = prev) != NULL);
3323
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)
3327 {
3328 total = 0;
3329 while (prev != NULL
3330 && ((total += tail->output_offset - prev->output_offset)
3331 < stub_group_size))
3332 {
3333 tail = prev;
3334 prev = PREV_SEC (tail);
3335 htab->stub_group[tail->id].link_sec = curr;
3336 }
3337 }
3338 tail = prev;
3339 }
3340 }
3341 while (list-- != htab->input_list);
3342
3343 free (htab->input_list);
3344 }
3345
3346 #undef PREV_SEC
3347
3348 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
3349
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)
3356
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
3361
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. */
3364
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)
3383
3384 /* Classify an INSN if it is indeed a load/store.
3385
3386 Return TRUE if INSN is a LD/ST instruction otherwise return FALSE.
3387
3388 For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2
3389 is set equal to RT.
3390
3391 For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned. */
3392
3393 static bfd_boolean
3394 aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rt2,
3395 bfd_boolean *pair, bfd_boolean *load)
3396 {
3397 uint32_t opcode;
3398 unsigned int r;
3399 uint32_t opc = 0;
3400 uint32_t v = 0;
3401 uint32_t opc_v = 0;
3402
3403 /* Bail out quickly if INSN doesn't fall into the load-store
3404 encoding space. */
3405 if (!AARCH64_LDST (insn))
3406 return FALSE;
3407
3408 *pair = FALSE;
3409 *load = FALSE;
3410 if (AARCH64_LDST_EX (insn))
3411 {
3412 *rt = AARCH64_RT (insn);
3413 *rt2 = *rt;
3414 if (AARCH64_BIT (insn, 21) == 1)
3415 {
3416 *pair = TRUE;
3417 *rt2 = AARCH64_RT2 (insn);
3418 }
3419 *load = AARCH64_LD (insn);
3420 return TRUE;
3421 }
3422 else if (AARCH64_LDST_NAP (insn)
3423 || AARCH64_LDSTP_PI (insn)
3424 || AARCH64_LDSTP_O (insn)
3425 || AARCH64_LDSTP_PRE (insn))
3426 {
3427 *pair = TRUE;
3428 *rt = AARCH64_RT (insn);
3429 *rt2 = AARCH64_RT2 (insn);
3430 *load = AARCH64_LD (insn);
3431 return TRUE;
3432 }
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))
3440 {
3441 *rt = AARCH64_RT (insn);
3442 *rt2 = *rt;
3443 if (AARCH64_LDST_PCREL (insn))
3444 *load = TRUE;
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);
3450 return TRUE;
3451 }
3452 else if (AARCH64_LDST_SIMD_M (insn)
3453 || AARCH64_LDST_SIMD_M_PI (insn))
3454 {
3455 *rt = AARCH64_RT (insn);
3456 *load = AARCH64_BIT (insn, 22);
3457 opcode = (insn >> 12) & 0xf;
3458 switch (opcode)
3459 {
3460 case 0:
3461 case 2:
3462 *rt2 = *rt + 3;
3463 break;
3464
3465 case 4:
3466 case 6:
3467 *rt2 = *rt + 2;
3468 break;
3469
3470 case 7:
3471 *rt2 = *rt;
3472 break;
3473
3474 case 8:
3475 case 10:
3476 *rt2 = *rt + 1;
3477 break;
3478
3479 default:
3480 return FALSE;
3481 }
3482 return TRUE;
3483 }
3484 else if (AARCH64_LDST_SIMD_S (insn)
3485 || AARCH64_LDST_SIMD_S_PI (insn))
3486 {
3487 *rt = AARCH64_RT (insn);
3488 r = (insn >> 21) & 1;
3489 *load = AARCH64_BIT (insn, 22);
3490 opcode = (insn >> 13) & 0x7;
3491 switch (opcode)
3492 {
3493 case 0:
3494 case 2:
3495 case 4:
3496 *rt2 = *rt + r;
3497 break;
3498
3499 case 1:
3500 case 3:
3501 case 5:
3502 *rt2 = *rt + (r == 0 ? 2 : 3);
3503 break;
3504
3505 case 6:
3506 *rt2 = *rt + r;
3507 break;
3508
3509 case 7:
3510 *rt2 = *rt + (r == 0 ? 2 : 3);
3511 break;
3512
3513 default:
3514 return FALSE;
3515 }
3516 return TRUE;
3517 }
3518
3519 return FALSE;
3520 }
3521
3522 /* Return TRUE if INSN is multiply-accumulate. */
3523
3524 static bfd_boolean
3525 aarch64_mlxl_p (uint32_t insn)
3526 {
3527 uint32_t op31 = AARCH64_OP31 (insn);
3528
3529 if (AARCH64_MAC (insn)
3530 && (op31 == 0 || op31 == 1 || op31 == 5)
3531 /* Exclude MUL instructions which are encoded as a multiple accumulate
3532 with RA = XZR. */
3533 && AARCH64_RA (insn) != AARCH64_ZR)
3534 return TRUE;
3535
3536 return FALSE;
3537 }
3538
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. */
3551
3552 static bfd_boolean
3553 aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2)
3554 {
3555 uint32_t rt;
3556 uint32_t rt2;
3557 uint32_t rn;
3558 uint32_t rm;
3559 uint32_t ra;
3560 bfd_boolean pair;
3561 bfd_boolean load;
3562
3563 if (aarch64_mlxl_p (insn_2)
3564 && aarch64_mem_op_p (insn_1, &rt, &rt2, &pair, &load))
3565 {
3566 /* Any SIMD memory op is independent of the subsequent MLA
3567 by definition of the erratum. */
3568 if (AARCH64_BIT (insn_1, 26))
3569 return TRUE;
3570
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);
3575
3576 /* If this is a load and there's a true(RAW) dependency, we are safe
3577 and this is not an erratum sequence. */
3578 if (load &&
3579 (rt == rn || rt == rm || rt == ra
3580 || (pair && (rt2 == rn || rt2 == rm || rt2 == ra))))
3581 return FALSE;
3582
3583 /* We conservatively put out stubs for all other cases (including
3584 writebacks). */
3585 return TRUE;
3586 }
3587
3588 return FALSE;
3589 }
3590
3591 /* Used to order a list of mapping symbols by address. */
3592
3593 static int
3594 elf_aarch64_compare_mapping (const void *a, const void *b)
3595 {
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;
3598
3599 if (amap->vma > bmap->vma)
3600 return 1;
3601 else if (amap->vma < bmap->vma)
3602 return -1;
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
3606 after vma. */
3607 return 1;
3608 else if (amap->type < bmap->type)
3609 return -1;
3610 else
3611 return 0;
3612 }
3613
3614
3615 static char *
3616 _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes)
3617 {
3618 char *stub_name = (char *) bfd_malloc
3619 (strlen ("__erratum_835769_veneer_") + 16);
3620 sprintf (stub_name,"__erratum_835769_veneer_%d", num_fixes);
3621 return stub_name;
3622 }
3623
3624 /* Scan for Cortex-A53 erratum 835769 sequence.
3625
3626 Return TRUE else FALSE on abnormal termination. */
3627
3628 static bfd_boolean
3629 _bfd_aarch64_erratum_835769_scan (bfd *input_bfd,
3630 struct bfd_link_info *info,
3631 unsigned int *num_fixes_p)
3632 {
3633 asection *section;
3634 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3635 unsigned int num_fixes = *num_fixes_p;
3636
3637 if (htab == NULL)
3638 return TRUE;
3639
3640 for (section = input_bfd->sections;
3641 section != NULL;
3642 section = section->next)
3643 {
3644 bfd_byte *contents = NULL;
3645 struct _aarch64_elf_section_data *sec_data;
3646 unsigned int span;
3647
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))
3653 continue;
3654
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))
3658 return FALSE;
3659
3660 sec_data = elf_aarch64_section_data (section);
3661
3662 qsort (sec_data->map, sec_data->mapcount,
3663 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
3664
3665 for (span = 0; span < sec_data->mapcount; span++)
3666 {
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);
3671 unsigned int i;
3672 char span_type = sec_data->map[span].type;
3673
3674 if (span_type == 'd')
3675 continue;
3676
3677 for (i = span_start; i + 4 < span_end; i += 4)
3678 {
3679 uint32_t insn_1 = bfd_getl32 (contents + i);
3680 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
3681
3682 if (aarch64_erratum_sequence (insn_1, insn_2))
3683 {
3684 struct elf_aarch64_stub_hash_entry *stub_entry;
3685 char *stub_name = _bfd_aarch64_erratum_835769_stub_name (num_fixes);
3686 if (! stub_name)
3687 return FALSE;
3688
3689 stub_entry = _bfd_aarch64_add_stub_entry_in_group (stub_name,
3690 section,
3691 htab);
3692 if (! stub_entry)
3693 return FALSE;
3694
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;
3700 num_fixes++;
3701 }
3702 }
3703 }
3704 if (elf_section_data (section)->this_hdr.contents == NULL)
3705 free (contents);
3706 }
3707
3708 *num_fixes_p = num_fixes;
3709
3710 return TRUE;
3711 }
3712
3713
3714 /* Test if instruction INSN is ADRP. */
3715
3716 static bfd_boolean
3717 _bfd_aarch64_adrp_p (uint32_t insn)
3718 {
3719 return ((insn & 0x9f000000) == 0x90000000);
3720 }
3721
3722
3723 /* Helper predicate to look for cortex-a53 erratum 843419 sequence 1. */
3724
3725 static bfd_boolean
3726 _bfd_aarch64_erratum_843419_sequence_p (uint32_t insn_1, uint32_t insn_2,
3727 uint32_t insn_3)
3728 {
3729 uint32_t rt;
3730 uint32_t rt2;
3731 bfd_boolean pair;
3732 bfd_boolean load;
3733
3734 return (aarch64_mem_op_p (insn_2, &rt, &rt2, &pair, &load)
3735 && (!pair
3736 || (pair && !load))
3737 && AARCH64_LDST_UIMM (insn_3)
3738 && AARCH64_RN (insn_3) == AARCH64_RD (insn_1));
3739 }
3740
3741
3742 /* Test for the presence of Cortex-A53 erratum 843419 instruction sequence.
3743
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.
3748 */
3749
3750 static bfd_boolean
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)
3754 {
3755 uint32_t insn_1 = bfd_getl32 (contents + i);
3756
3757 if (!_bfd_aarch64_adrp_p (insn_1))
3758 return FALSE;
3759
3760 if (span_end < i + 12)
3761 return FALSE;
3762
3763 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
3764 uint32_t insn_3 = bfd_getl32 (contents + i + 8);
3765
3766 if ((vma & 0xfff) != 0xff8 && (vma & 0xfff) != 0xffc)
3767 return FALSE;
3768
3769 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_3))
3770 {
3771 *p_veneer_i = i + 8;
3772 return TRUE;
3773 }
3774
3775 if (span_end < i + 16)
3776 return FALSE;
3777
3778 uint32_t insn_4 = bfd_getl32 (contents + i + 12);
3779
3780 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_4))
3781 {
3782 *p_veneer_i = i + 12;
3783 return TRUE;
3784 }
3785
3786 return FALSE;
3787 }
3788
3789
3790 /* Resize all stub sections. */
3791
3792 static void
3793 _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table *htab)
3794 {
3795 asection *section;
3796
3797 /* OK, we've added some stubs. Find out the new size of the
3798 stub sections. */
3799 for (section = htab->stub_bfd->sections;
3800 section != NULL; section = section->next)
3801 {
3802 /* Ignore non-stub sections. */
3803 if (!strstr (section->name, STUB_SUFFIX))
3804 continue;
3805 section->size = 0;
3806 }
3807
3808 bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab);
3809
3810 for (section = htab->stub_bfd->sections;
3811 section != NULL; section = section->next)
3812 {
3813 if (!strstr (section->name, STUB_SUFFIX))
3814 continue;
3815
3816 if (section->size)
3817 section->size += 4;
3818
3819 /* Ensure all stub sections have a size which is a multiple of
3820 4096. This is important in order to ensure that the insertion
3821 of stub sections does not in itself move existing code around
3822 in such a way that new errata sequences are created. */
3823 if (htab->fix_erratum_843419)
3824 if (section->size)
3825 section->size = BFD_ALIGN (section->size, 0x1000);
3826 }
3827 }
3828
3829
3830 /* Construct an erratum 843419 workaround stub name.
3831 */
3832
3833 static char *
3834 _bfd_aarch64_erratum_843419_stub_name (asection *input_section,
3835 bfd_vma offset)
3836 {
3837 const bfd_size_type len = 8 + 4 + 1 + 8 + 1 + 16 + 1;
3838 char *stub_name = bfd_malloc (len);
3839
3840 if (stub_name != NULL)
3841 snprintf (stub_name, len, "e843419@%04x_%08x_%" BFD_VMA_FMT "x",
3842 input_section->owner->id,
3843 input_section->id,
3844 offset);
3845 return stub_name;
3846 }
3847
3848 /* Build a stub_entry structure describing an 843419 fixup.
3849
3850 The stub_entry constructed is populated with the bit pattern INSN
3851 of the instruction located at OFFSET within input SECTION.
3852
3853 Returns TRUE on success. */
3854
3855 static bfd_boolean
3856 _bfd_aarch64_erratum_843419_fixup (uint32_t insn,
3857 bfd_vma adrp_offset,
3858 bfd_vma ldst_offset,
3859 asection *section,
3860 struct bfd_link_info *info)
3861 {
3862 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3863 char *stub_name;
3864 struct elf_aarch64_stub_hash_entry *stub_entry;
3865
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,
3868 FALSE, FALSE);
3869 if (stub_entry)
3870 {
3871 free (stub_name);
3872 return TRUE;
3873 }
3874
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
3884 section.
3885 */
3886
3887 stub_entry = _bfd_aarch64_add_stub_entry_after (stub_name, section, htab);
3888 if (stub_entry == NULL)
3889 {
3890 free (stub_name);
3891 return FALSE;
3892 }
3893
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;
3900
3901 return TRUE;
3902 }
3903
3904
3905 /* Scan an input section looking for the signature of erratum 843419.
3906
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.
3910
3911 Return TRUE on successful scan, FALSE on failure to scan.
3912 */
3913
3914 static bfd_boolean
3915 _bfd_aarch64_erratum_843419_scan (bfd *input_bfd, asection *section,
3916 struct bfd_link_info *info)
3917 {
3918 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3919
3920 if (htab == NULL)
3921 return TRUE;
3922
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))
3928 return TRUE;
3929
3930 do
3931 {
3932 bfd_byte *contents = NULL;
3933 struct _aarch64_elf_section_data *sec_data;
3934 unsigned int span;
3935
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))
3939 return FALSE;
3940
3941 sec_data = elf_aarch64_section_data (section);
3942
3943 qsort (sec_data->map, sec_data->mapcount,
3944 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
3945
3946 for (span = 0; span < sec_data->mapcount; span++)
3947 {
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);
3952 unsigned int i;
3953 char span_type = sec_data->map[span].type;
3954
3955 if (span_type == 'd')
3956 continue;
3957
3958 for (i = span_start; i + 8 < span_end; i += 4)
3959 {
3960 bfd_vma vma = (section->output_section->vma
3961 + section->output_offset
3962 + i);
3963 bfd_vma veneer_i;
3964
3965 if (_bfd_aarch64_erratum_843419_p
3966 (contents, vma, i, span_end, &veneer_i))
3967 {
3968 uint32_t insn = bfd_getl32 (contents + veneer_i);
3969
3970 if (!_bfd_aarch64_erratum_843419_fixup (insn, i, veneer_i,
3971 section, info))
3972 return FALSE;
3973 }
3974 }
3975 }
3976
3977 if (elf_section_data (section)->this_hdr.contents == NULL)
3978 free (contents);
3979 }
3980 while (0);
3981
3982 return TRUE;
3983 }
3984
3985
3986 /* Determine and set the size of the stub section for a final link.
3987
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"
3990 instruction. */
3991
3992 bfd_boolean
3993 elfNN_aarch64_size_stubs (bfd *output_bfd,
3994 bfd *stub_bfd,
3995 struct bfd_link_info *info,
3996 bfd_signed_vma group_size,
3997 asection * (*add_stub_section) (const char *,
3998 asection *),
3999 void (*layout_sections_again) (void))
4000 {
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;
4006
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));
4011
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;
4017 if (group_size < 0)
4018 stub_group_size = -group_size;
4019 else
4020 stub_group_size = group_size;
4021
4022 if (stub_group_size == 1)
4023 {
4024 /* Default values. */
4025 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
4026 stub_group_size = 127 * 1024 * 1024;
4027 }
4028
4029 group_sections (htab, stub_group_size, stubs_always_before_branch);
4030
4031 (*htab->layout_sections_again) ();
4032
4033 if (htab->fix_erratum_835769)
4034 {
4035 bfd *input_bfd;
4036
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))
4041 return FALSE;
4042
4043 _bfd_aarch64_resize_stubs (htab);
4044 (*htab->layout_sections_again) ();
4045 }
4046
4047 if (htab->fix_erratum_843419)
4048 {
4049 bfd *input_bfd;
4050
4051 for (input_bfd = info->input_bfds;
4052 input_bfd != NULL;
4053 input_bfd = input_bfd->link.next)
4054 {
4055 asection *section;
4056
4057 for (section = input_bfd->sections;
4058 section != NULL;
4059 section = section->next)
4060 if (!_bfd_aarch64_erratum_843419_scan (input_bfd, section, info))
4061 return FALSE;
4062 }
4063
4064 _bfd_aarch64_resize_stubs (htab);
4065 (*htab->layout_sections_again) ();
4066 }
4067
4068 while (1)
4069 {
4070 bfd *input_bfd;
4071
4072 for (input_bfd = info->input_bfds;
4073 input_bfd != NULL; input_bfd = input_bfd->link.next)
4074 {
4075 Elf_Internal_Shdr *symtab_hdr;
4076 asection *section;
4077 Elf_Internal_Sym *local_syms = NULL;
4078
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)
4082 continue;
4083
4084 /* Walk over each section attached to the input bfd. */
4085 for (section = input_bfd->sections;
4086 section != NULL; section = section->next)
4087 {
4088 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4089
4090 /* If there aren't any relocs, then there's nothing more
4091 to do. */
4092 if ((section->flags & SEC_RELOC) == 0
4093 || section->reloc_count == 0
4094 || (section->flags & SEC_CODE) == 0)
4095 continue;
4096
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)
4101 continue;
4102
4103 /* Get the relocs. */
4104 internal_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;
4109
4110 /* Now examine each relocation. */
4111 irela = internal_relocs;
4112 irelaend = irela + section->reloc_count;
4113 for (; irela < irelaend; irela++)
4114 {
4115 unsigned int r_type, r_indx;
4116 enum elf_aarch64_stub_type stub_type;
4117 struct elf_aarch64_stub_hash_entry *stub_entry;
4118 asection *sym_sec;
4119 bfd_vma sym_value;
4120 bfd_vma destination;
4121 struct elf_aarch64_link_hash_entry *hash;
4122 const char *sym_name;
4123 char *stub_name;
4124 const asection *id_sec;
4125 unsigned char st_type;
4126 bfd_size_type len;
4127
4128 r_type = ELFNN_R_TYPE (irela->r_info);
4129 r_indx = ELFNN_R_SYM (irela->r_info);
4130
4131 if (r_type >= (unsigned int) R_AARCH64_end)
4132 {
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;
4138 }
4139
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))
4144 continue;
4145
4146 /* Now determine the call target, its name, value,
4147 section. */
4148 sym_sec = NULL;
4149 sym_value = 0;
4150 destination = 0;
4151 hash = NULL;
4152 sym_name = NULL;
4153 if (r_indx < symtab_hdr->sh_info)
4154 {
4155 /* It's a local symbol. */
4156 Elf_Internal_Sym *sym;
4157 Elf_Internal_Shdr *hdr;
4158
4159 if (local_syms == NULL)
4160 {
4161 local_syms
4162 = (Elf_Internal_Sym *) symtab_hdr->contents;
4163 if (local_syms == NULL)
4164 local_syms
4165 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
4166 symtab_hdr->sh_info, 0,
4167 NULL, NULL, NULL);
4168 if (local_syms == NULL)
4169 goto error_ret_free_internal;
4170 }
4171
4172 sym = local_syms + r_indx;
4173 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
4174 sym_sec = hdr->bfd_section;
4175 if (!sym_sec)
4176 /* This is an undefined symbol. It can never
4177 be resolved. */
4178 continue;
4179
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);
4186 sym_name
4187 = bfd_elf_string_from_elf_section (input_bfd,
4188 symtab_hdr->sh_link,
4189 sym->st_name);
4190 }
4191 else
4192 {
4193 int e_indx;
4194
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]);
4198
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);
4203
4204 if (hash->root.root.type == bfd_link_hash_defined
4205 || hash->root.root.type == bfd_link_hash_defweak)
4206 {
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
4214 needed. */
4215 if (globals->root.splt != NULL && hash != NULL
4216 && hash->root.plt.offset != (bfd_vma) - 1)
4217 {
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
4223 +
4224 sym_sec->output_section->vma);
4225 }
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);
4230 }
4231 else if (hash->root.root.type == bfd_link_hash_undefined
4232 || (hash->root.root.type
4233 == bfd_link_hash_undefweak))
4234 {
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);
4241
4242 if (globals->root.splt != NULL && hash != NULL
4243 && hash->root.plt.offset != (bfd_vma) - 1)
4244 {
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
4250 +
4251 sym_sec->output_section->vma);
4252 }
4253 else
4254 continue;
4255 }
4256 else
4257 {
4258 bfd_set_error (bfd_error_bad_value);
4259 goto error_ret_free_internal;
4260 }
4261 st_type = ELF_ST_TYPE (hash->root.type);
4262 sym_name = hash->root.root.root.string;
4263 }
4264
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)
4269 continue;
4270
4271 /* Support for grouping stub sections. */
4272 id_sec = htab->stub_group[section->id].link_sec;
4273
4274 /* Get the name of this stub. */
4275 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash,
4276 irela);
4277 if (!stub_name)
4278 goto error_ret_free_internal;
4279
4280 stub_entry =
4281 aarch64_stub_hash_lookup (&htab->stub_hash_table,
4282 stub_name, FALSE, FALSE);
4283 if (stub_entry != NULL)
4284 {
4285 /* The proper stub has already been created. */
4286 free (stub_name);
4287 continue;
4288 }
4289
4290 stub_entry = _bfd_aarch64_add_stub_entry_in_group
4291 (stub_name, section, htab);
4292 if (stub_entry == NULL)
4293 {
4294 free (stub_name);
4295 goto error_ret_free_internal;
4296 }
4297
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;
4303
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)
4309 {
4310 free (stub_name);
4311 goto error_ret_free_internal;
4312 }
4313
4314 snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME,
4315 sym_name);
4316
4317 stub_changed = TRUE;
4318 }
4319
4320 /* We're done with the internal relocs, free them. */
4321 if (elf_section_data (section)->relocs == NULL)
4322 free (internal_relocs);
4323 }
4324 }
4325
4326 if (!stub_changed)
4327 break;
4328
4329 _bfd_aarch64_resize_stubs (htab);
4330
4331 /* Ask the linker to do its stuff. */
4332 (*htab->layout_sections_again) ();
4333 stub_changed = FALSE;
4334 }
4335
4336 return TRUE;
4337
4338 error_ret_free_local:
4339 return FALSE;
4340 }
4341
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
4346 linker. */
4347
4348 bfd_boolean
4349 elfNN_aarch64_build_stubs (struct bfd_link_info *info)
4350 {
4351 asection *stub_sec;
4352 struct bfd_hash_table *table;
4353 struct elf_aarch64_link_hash_table *htab;
4354
4355 htab = elf_aarch64_hash_table (info);
4356
4357 for (stub_sec = htab->stub_bfd->sections;
4358 stub_sec != NULL; stub_sec = stub_sec->next)
4359 {
4360 bfd_size_type size;
4361
4362 /* Ignore non-stub sections. */
4363 if (!strstr (stub_sec->name, STUB_SUFFIX))
4364 continue;
4365
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)
4370 return FALSE;
4371 stub_sec->size = 0;
4372
4373 bfd_putl32 (0x14000000 | (size >> 2), stub_sec->contents);
4374 stub_sec->size += 4;
4375 }
4376
4377 /* Build the stubs as directed by the stub hash table. */
4378 table = &htab->stub_hash_table;
4379 bfd_hash_traverse (table, aarch64_build_one_stub, info);
4380
4381 return TRUE;
4382 }
4383
4384
4385 /* Add an entry to the code/data map for section SEC. */
4386
4387 static void
4388 elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma)
4389 {
4390 struct _aarch64_elf_section_data *sec_data =
4391 elf_aarch64_section_data (sec);
4392 unsigned int newidx;
4393
4394 if (sec_data->map == NULL)
4395 {
4396 sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map));
4397 sec_data->mapcount = 0;
4398 sec_data->mapsize = 1;
4399 }
4400
4401 newidx = sec_data->mapcount++;
4402
4403 if (sec_data->mapcount > sec_data->mapsize)
4404 {
4405 sec_data->mapsize *= 2;
4406 sec_data->map = bfd_realloc_or_free
4407 (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map));
4408 }
4409
4410 if (sec_data->map)
4411 {
4412 sec_data->map[newidx].vma = vma;
4413 sec_data->map[newidx].type = type;
4414 }
4415 }
4416
4417
4418 /* Initialise maps of insn/data for input BFDs. */
4419 void
4420 bfd_elfNN_aarch64_init_maps (bfd *abfd)
4421 {
4422 Elf_Internal_Sym *isymbuf;
4423 Elf_Internal_Shdr *hdr;
4424 unsigned int i, localsyms;
4425
4426 /* Make sure that we are dealing with an AArch64 elf binary. */
4427 if (!is_aarch64_elf (abfd))
4428 return;
4429
4430 if ((abfd->flags & DYNAMIC) != 0)
4431 return;
4432
4433 hdr = &elf_symtab_hdr (abfd);
4434 localsyms = hdr->sh_info;
4435
4436 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
4437 should contain the number of local symbols, which should come before any
4438 global symbols. Mapping symbols are always local. */
4439 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL);
4440
4441 /* No internal symbols read? Skip this BFD. */
4442 if (isymbuf == NULL)
4443 return;
4444
4445 for (i = 0; i < localsyms; i++)
4446 {
4447 Elf_Internal_Sym *isym = &isymbuf[i];
4448 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4449 const char *name;
4450
4451 if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
4452 {
4453 name = bfd_elf_string_from_elf_section (abfd,
4454 hdr->sh_link,
4455 isym->st_name);
4456
4457 if (bfd_is_aarch64_special_symbol_name
4458 (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP))
4459 elfNN_aarch64_section_map_add (sec, name[1], isym->st_value);
4460 }
4461 }
4462 }
4463
4464 /* Set option values needed during linking. */
4465 void
4466 bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
4467 struct bfd_link_info *link_info,
4468 int no_enum_warn,
4469 int no_wchar_warn, int pic_veneer,
4470 int fix_erratum_835769,
4471 int fix_erratum_843419,
4472 int no_apply_dynamic_relocs)
4473 {
4474 struct elf_aarch64_link_hash_table *globals;
4475
4476 globals = elf_aarch64_hash_table (link_info);
4477 globals->pic_veneer = pic_veneer;
4478 globals->fix_erratum_835769 = fix_erratum_835769;
4479 globals->fix_erratum_843419 = fix_erratum_843419;
4480 globals->fix_erratum_843419_adr = TRUE;
4481 globals->no_apply_dynamic_relocs = no_apply_dynamic_relocs;
4482
4483 BFD_ASSERT (is_aarch64_elf (output_bfd));
4484 elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
4485 elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
4486 }
4487
4488 static bfd_vma
4489 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h,
4490 struct elf_aarch64_link_hash_table
4491 *globals, struct bfd_link_info *info,
4492 bfd_vma value, bfd *output_bfd,
4493 bfd_boolean *unresolved_reloc_p)
4494 {
4495 bfd_vma off = (bfd_vma) - 1;
4496 asection *basegot = globals->root.sgot;
4497 bfd_boolean dyn = globals->root.dynamic_sections_created;
4498
4499 if (h != NULL)
4500 {
4501 BFD_ASSERT (basegot != NULL);
4502 off = h->got.offset;
4503 BFD_ASSERT (off != (bfd_vma) - 1);
4504 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
4505 || (bfd_link_pic (info)
4506 && SYMBOL_REFERENCES_LOCAL (info, h))
4507 || (ELF_ST_VISIBILITY (h->other)
4508 && h->root.type == bfd_link_hash_undefweak))
4509 {
4510 /* This is actually a static link, or it is a -Bsymbolic link
4511 and the symbol is defined locally. We must initialize this
4512 entry in the global offset table. Since the offset must
4513 always be a multiple of 8 (4 in the case of ILP32), we use
4514 the least significant bit to record whether we have
4515 initialized it already.
4516 When doing a dynamic link, we create a .rel(a).got relocation
4517 entry to initialize the value. This is done in the
4518 finish_dynamic_symbol routine. */
4519 if ((off & 1) != 0)
4520 off &= ~1;
4521 else
4522 {
4523 bfd_put_NN (output_bfd, value, basegot->contents + off);
4524 h->got.offset |= 1;
4525 }
4526 }
4527 else
4528 *unresolved_reloc_p = FALSE;
4529
4530 off = off + basegot->output_section->vma + basegot->output_offset;
4531 }
4532
4533 return off;
4534 }
4535
4536 /* Change R_TYPE to a more efficient access model where possible,
4537 return the new reloc type. */
4538
4539 static bfd_reloc_code_real_type
4540 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type,
4541 struct elf_link_hash_entry *h)
4542 {
4543 bfd_boolean is_local = h == NULL;
4544
4545 switch (r_type)
4546 {
4547 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4548 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4549 return (is_local
4550 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4551 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21);
4552
4553 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4554 return (is_local
4555 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4556 : r_type);
4557
4558 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4559 return (is_local
4560 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4561 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
4562
4563 case BFD_RELOC_AARCH64_TLSDESC_LDR:
4564 return (is_local
4565 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4566 : BFD_RELOC_AARCH64_NONE);
4567
4568 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
4569 return (is_local
4570 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
4571 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC);
4572
4573 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
4574 return (is_local
4575 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
4576 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1);
4577
4578 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
4579 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4580 return (is_local
4581 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4582 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC);
4583
4584 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4585 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type;
4586
4587 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4588 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type;
4589
4590 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4591 return r_type;
4592
4593 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4594 return (is_local
4595 ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
4596 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
4597
4598 case BFD_RELOC_AARCH64_TLSDESC_ADD:
4599 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12:
4600 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4601 /* Instructions with these relocations will become NOPs. */
4602 return BFD_RELOC_AARCH64_NONE;
4603
4604 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
4605 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
4606 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
4607 return is_local ? BFD_RELOC_AARCH64_NONE : r_type;
4608
4609 #if ARCH_SIZE == 64
4610 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
4611 return is_local
4612 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
4613 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC;
4614
4615 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
4616 return is_local
4617 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
4618 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1;
4619 #endif
4620
4621 default:
4622 break;
4623 }
4624
4625 return r_type;
4626 }
4627
4628 static unsigned int
4629 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type)
4630 {
4631 switch (r_type)
4632 {
4633 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4634 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4635 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
4636 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4637 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
4638 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
4639 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4640 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC:
4641 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
4642 return GOT_NORMAL;
4643
4644 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4645 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4646 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4647 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
4648 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
4649 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
4650 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
4651 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
4652 return GOT_TLS_GD;
4653
4654 case BFD_RELOC_AARCH64_TLSDESC_ADD:
4655 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12:
4656 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4657 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4658 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4659 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
4660 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12:
4661 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4662 case BFD_RELOC_AARCH64_TLSDESC_LDR:
4663 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
4664 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
4665 return GOT_TLSDESC_GD;
4666
4667 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4668 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
4669 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
4670 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4671 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC:
4672 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1:
4673 return GOT_TLS_IE;
4674
4675 default:
4676 break;
4677 }
4678 return GOT_UNKNOWN;
4679 }
4680
4681 static bfd_boolean
4682 aarch64_can_relax_tls (bfd *input_bfd,
4683 struct bfd_link_info *info,
4684 bfd_reloc_code_real_type r_type,
4685 struct elf_link_hash_entry *h,
4686 unsigned long r_symndx)
4687 {
4688 unsigned int symbol_got_type;
4689 unsigned int reloc_got_type;
4690
4691 if (! IS_AARCH64_TLS_RELAX_RELOC (r_type))
4692 return FALSE;
4693
4694 symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx);
4695 reloc_got_type = aarch64_reloc_got_type (r_type);
4696
4697 if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type))
4698 return TRUE;
4699
4700 if (!bfd_link_executable (info))
4701 return FALSE;
4702
4703 if (h && h->root.type == bfd_link_hash_undefweak)
4704 return FALSE;
4705
4706 return TRUE;
4707 }
4708
4709 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
4710 enumerator. */
4711
4712 static bfd_reloc_code_real_type
4713 aarch64_tls_transition (bfd *input_bfd,
4714 struct bfd_link_info *info,
4715 unsigned int r_type,
4716 struct elf_link_hash_entry *h,
4717 unsigned long r_symndx)
4718 {
4719 bfd_reloc_code_real_type bfd_r_type
4720 = elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type);
4721
4722 if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx))
4723 return bfd_r_type;
4724
4725 return aarch64_tls_transition_without_check (bfd_r_type, h);
4726 }
4727
4728 /* Return the base VMA address which should be subtracted from real addresses
4729 when resolving R_AARCH64_TLS_DTPREL relocation. */
4730
4731 static bfd_vma
4732 dtpoff_base (struct bfd_link_info *info)
4733 {
4734 /* If tls_sec is NULL, we should have signalled an error already. */
4735 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4736 return elf_hash_table (info)->tls_sec->vma;
4737 }
4738
4739 /* Return the base VMA address which should be subtracted from real addresses
4740 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
4741
4742 static bfd_vma
4743 tpoff_base (struct bfd_link_info *info)
4744 {
4745 struct elf_link_hash_table *htab = elf_hash_table (info);
4746
4747 /* If tls_sec is NULL, we should have signalled an error already. */
4748 BFD_ASSERT (htab->tls_sec != NULL);
4749
4750 bfd_vma base = align_power ((bfd_vma) TCB_SIZE,
4751 htab->tls_sec->alignment_power);
4752 return htab->tls_sec->vma - base;
4753 }
4754
4755 static bfd_vma *
4756 symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
4757 unsigned long r_symndx)
4758 {
4759 /* Calculate the address of the GOT entry for symbol
4760 referred to in h. */
4761 if (h != NULL)
4762 return &h->got.offset;
4763 else
4764 {
4765 /* local symbol */
4766 struct elf_aarch64_local_symbol *l;
4767
4768 l = elf_aarch64_locals (input_bfd);
4769 return &l[r_symndx].got_offset;
4770 }
4771 }
4772
4773 static void
4774 symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
4775 unsigned long r_symndx)
4776 {
4777 bfd_vma *p;
4778 p = symbol_got_offset_ref (input_bfd, h, r_symndx);
4779 *p |= 1;
4780 }
4781
4782 static int
4783 symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h,
4784 unsigned long r_symndx)
4785 {
4786 bfd_vma value;
4787 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
4788 return value & 1;
4789 }
4790
4791 static bfd_vma
4792 symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
4793 unsigned long r_symndx)
4794 {
4795 bfd_vma value;
4796 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
4797 value &= ~1;
4798 return value;
4799 }
4800
4801 static bfd_vma *
4802 symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
4803 unsigned long r_symndx)
4804 {
4805 /* Calculate the address of the GOT entry for symbol
4806 referred to in h. */
4807 if (h != NULL)
4808 {
4809 struct elf_aarch64_link_hash_entry *eh;
4810 eh = (struct elf_aarch64_link_hash_entry *) h;
4811 return &eh->tlsdesc_got_jump_table_offset;
4812 }
4813 else
4814 {
4815 /* local symbol */
4816 struct elf_aarch64_local_symbol *l;
4817
4818 l = elf_aarch64_locals (input_bfd);
4819 return &l[r_symndx].tlsdesc_got_jump_table_offset;
4820 }
4821 }
4822
4823 static void
4824 symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
4825 unsigned long r_symndx)
4826 {
4827 bfd_vma *p;
4828 p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4829 *p |= 1;
4830 }
4831
4832 static int
4833 symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd,
4834 struct elf_link_hash_entry *h,
4835 unsigned long r_symndx)
4836 {
4837 bfd_vma value;
4838 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4839 return value & 1;
4840 }
4841
4842 static bfd_vma
4843 symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
4844 unsigned long r_symndx)
4845 {
4846 bfd_vma value;
4847 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4848 value &= ~1;
4849 return value;
4850 }
4851
4852 /* Data for make_branch_to_erratum_835769_stub(). */
4853
4854 struct erratum_835769_branch_to_stub_data
4855 {
4856 struct bfd_link_info *info;
4857 asection *output_section;
4858 bfd_byte *contents;
4859 };
4860
4861 /* Helper to insert branches to erratum 835769 stubs in the right
4862 places for a particular section. */
4863
4864 static bfd_boolean
4865 make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry,
4866 void *in_arg)
4867 {
4868 struct elf_aarch64_stub_hash_entry *stub_entry;
4869 struct erratum_835769_branch_to_stub_data *data;
4870 bfd_byte *contents;
4871 unsigned long branch_insn = 0;
4872 bfd_vma veneered_insn_loc, veneer_entry_loc;
4873 bfd_signed_vma branch_offset;
4874 unsigned int target;
4875 bfd *abfd;
4876
4877 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
4878 data = (struct erratum_835769_branch_to_stub_data *) in_arg;
4879
4880 if (stub_entry->target_section != data->output_section
4881 || stub_entry->stub_type != aarch64_stub_erratum_835769_veneer)
4882 return TRUE;
4883
4884 contents = data->contents;
4885 veneered_insn_loc = stub_entry->target_section->output_section->vma
4886 + stub_entry->target_section->output_offset
4887 + stub_entry->target_value;
4888 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
4889 + stub_entry->stub_sec->output_offset
4890 + stub_entry->stub_offset;
4891 branch_offset = veneer_entry_loc - veneered_insn_loc;
4892
4893 abfd = stub_entry->target_section->owner;
4894 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
4895 _bfd_error_handler
4896 (_("%pB: error: erratum 835769 stub out "
4897 "of range (input file too large)"), abfd);
4898
4899 target = stub_entry->target_value;
4900 branch_insn = 0x14000000;
4901 branch_offset >>= 2;
4902 branch_offset &= 0x3ffffff;
4903 branch_insn |= branch_offset;
4904 bfd_putl32 (branch_insn, &contents[target]);
4905
4906 return TRUE;
4907 }
4908
4909
4910 static bfd_boolean
4911 _bfd_aarch64_erratum_843419_branch_to_stub (struct bfd_hash_entry *gen_entry,
4912 void *in_arg)
4913 {
4914 struct elf_aarch64_stub_hash_entry *stub_entry
4915 = (struct elf_aarch64_stub_hash_entry *) gen_entry;
4916 struct erratum_835769_branch_to_stub_data *data
4917 = (struct erratum_835769_branch_to_stub_data *) in_arg;
4918 struct bfd_link_info *info;
4919 struct elf_aarch64_link_hash_table *htab;
4920 bfd_byte *contents;
4921 asection *section;
4922 bfd *abfd;
4923 bfd_vma place;
4924 uint32_t insn;
4925
4926 info = data->info;
4927 contents = data->contents;
4928 section = data->output_section;
4929
4930 htab = elf_aarch64_hash_table (info);
4931
4932 if (stub_entry->target_section != section
4933 || stub_entry->stub_type != aarch64_stub_erratum_843419_veneer)
4934 return TRUE;
4935
4936 insn = bfd_getl32 (contents + stub_entry->target_value);
4937 bfd_putl32 (insn,
4938 stub_entry->stub_sec->contents + stub_entry->stub_offset);
4939
4940 place = (section->output_section->vma + section->output_offset
4941 + stub_entry->adrp_offset);
4942 insn = bfd_getl32 (contents + stub_entry->adrp_offset);
4943
4944 if ((insn & AARCH64_ADRP_OP_MASK) != AARCH64_ADRP_OP)
4945 abort ();
4946
4947 bfd_signed_vma imm =
4948 (_bfd_aarch64_sign_extend
4949 ((bfd_vma) _bfd_aarch64_decode_adrp_imm (insn) << 12, 33)
4950 - (place & 0xfff));
4951
4952 if (htab->fix_erratum_843419_adr
4953 && (imm >= AARCH64_MIN_ADRP_IMM && imm <= AARCH64_MAX_ADRP_IMM))
4954 {
4955 insn = (_bfd_aarch64_reencode_adr_imm (AARCH64_ADR_OP, imm)
4956 | AARCH64_RT (insn));
4957 bfd_putl32 (insn, contents + stub_entry->adrp_offset);
4958 }
4959 else
4960 {
4961 bfd_vma veneered_insn_loc;
4962 bfd_vma veneer_entry_loc;
4963 bfd_signed_vma branch_offset;
4964 uint32_t branch_insn;
4965
4966 veneered_insn_loc = stub_entry->target_section->output_section->vma
4967 + stub_entry->target_section->output_offset
4968 + stub_entry->target_value;
4969 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
4970 + stub_entry->stub_sec->output_offset
4971 + stub_entry->stub_offset;
4972 branch_offset = veneer_entry_loc - veneered_insn_loc;
4973
4974 abfd = stub_entry->target_section->owner;
4975 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
4976 _bfd_error_handler
4977 (_("%pB: error: erratum 843419 stub out "
4978 "of range (input file too large)"), abfd);
4979
4980 branch_insn = 0x14000000;
4981 branch_offset >>= 2;
4982 branch_offset &= 0x3ffffff;
4983 branch_insn |= branch_offset;
4984 bfd_putl32 (branch_insn, contents + stub_entry->target_value);
4985 }
4986 return TRUE;
4987 }
4988
4989
4990 static bfd_boolean
4991 elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED,
4992 struct bfd_link_info *link_info,
4993 asection *sec,
4994 bfd_byte *contents)
4995
4996 {
4997 struct elf_aarch64_link_hash_table *globals =
4998 elf_aarch64_hash_table (link_info);
4999
5000 if (globals == NULL)
5001 return FALSE;
5002
5003 /* Fix code to point to erratum 835769 stubs. */
5004 if (globals->fix_erratum_835769)
5005 {
5006 struct erratum_835769_branch_to_stub_data data;
5007
5008 data.info = link_info;
5009 data.output_section = sec;
5010 data.contents = contents;
5011 bfd_hash_traverse (&globals->stub_hash_table,
5012 make_branch_to_erratum_835769_stub, &data);
5013 }
5014
5015 if (globals->fix_erratum_843419)
5016 {
5017 struct erratum_835769_branch_to_stub_data data;
5018
5019 data.info = link_info;
5020 data.output_section = sec;
5021 data.contents = contents;
5022 bfd_hash_traverse (&globals->stub_hash_table,
5023 _bfd_aarch64_erratum_843419_branch_to_stub, &data);
5024 }
5025
5026 return FALSE;
5027 }
5028
5029 /* Return TRUE if RELOC is a relocation against the base of GOT table. */
5030
5031 static bfd_boolean
5032 aarch64_relocation_aginst_gp_p (bfd_reloc_code_real_type reloc)
5033 {
5034 return (reloc == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
5035 || reloc == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
5036 || reloc == BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
5037 || reloc == BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
5038 || reloc == BFD_RELOC_AARCH64_MOVW_GOTOFF_G1);
5039 }
5040
5041 /* Perform a relocation as part of a final link. The input relocation type
5042 should be TLS relaxed. */
5043
5044 static bfd_reloc_status_type
5045 elfNN_aarch64_final_link_relocate (reloc_howto_type *howto,
5046 bfd *input_bfd,
5047 bfd *output_bfd,
5048 asection *input_section,
5049 bfd_byte *contents,
5050 Elf_Internal_Rela *rel,
5051 bfd_vma value,
5052 struct bfd_link_info *info,
5053 asection *sym_sec,
5054 struct elf_link_hash_entry *h,
5055 bfd_boolean *unresolved_reloc_p,
5056 bfd_boolean save_addend,
5057 bfd_vma *saved_addend,
5058 Elf_Internal_Sym *sym)
5059 {
5060 Elf_Internal_Shdr *symtab_hdr;
5061 unsigned int r_type = howto->type;
5062 bfd_reloc_code_real_type bfd_r_type
5063 = elfNN_aarch64_bfd_reloc_from_howto (howto);
5064 unsigned long r_symndx;
5065 bfd_byte *hit_data = contents + rel->r_offset;
5066 bfd_vma place, off, got_entry_addr = 0;
5067 bfd_signed_vma signed_addend;
5068 struct elf_aarch64_link_hash_table *globals;
5069 bfd_boolean weak_undef_p;
5070 bfd_boolean relative_reloc;
5071 asection *base_got;
5072 bfd_vma orig_value = value;
5073 bfd_boolean resolved_to_zero;
5074
5075 globals = elf_aarch64_hash_table (info);
5076
5077 symtab_hdr = &elf_symtab_hdr (input_bfd);
5078
5079 BFD_ASSERT (is_aarch64_elf (input_bfd));
5080
5081 r_symndx = ELFNN_R_SYM (rel->r_info);
5082
5083 place = input_section->output_section->vma
5084 + input_section->output_offset + rel->r_offset;
5085
5086 /* Get addend, accumulating the addend for consecutive relocs
5087 which refer to the same offset. */
5088 signed_addend = saved_addend ? *saved_addend : 0;
5089 signed_addend += rel->r_addend;
5090
5091 weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak
5092 : bfd_is_und_section (sym_sec));
5093
5094 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
5095 it here if it is defined in a non-shared object. */
5096 if (h != NULL
5097 && h->type == STT_GNU_IFUNC
5098 && h->def_regular)
5099 {
5100 asection *plt;
5101 const char *name;
5102 bfd_vma addend = 0;
5103
5104 if ((input_section->flags & SEC_ALLOC) == 0)
5105 {
5106 /* Dynamic relocs are not propagated for SEC_DEBUGGING
5107 sections because such sections are not SEC_ALLOC and
5108 thus ld.so will not process them. */
5109 if ((input_section->flags & SEC_DEBUGGING) != 0)
5110 return bfd_reloc_ok;
5111
5112 if (h->root.root.string)
5113 name = h->root.root.string;
5114 else
5115 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, NULL);
5116 _bfd_error_handler
5117 /* xgettext:c-format */
5118 (_("%pB(%pA+%#" PRIx64 "): "
5119 "unresolvable %s relocation against symbol `%s'"),
5120 input_bfd, input_section, (uint64_t) rel->r_offset,
5121 howto->name, name);
5122 bfd_set_error (bfd_error_bad_value);
5123 return bfd_reloc_notsupported;
5124 }
5125 else if (h->plt.offset == (bfd_vma) -1)
5126 goto bad_ifunc_reloc;
5127
5128 /* STT_GNU_IFUNC symbol must go through PLT. */
5129 plt = globals->root.splt ? globals->root.splt : globals->root.iplt;
5130 value = (plt->output_section->vma + plt->output_offset + h->plt.offset);
5131
5132 switch (bfd_r_type)
5133 {
5134 default:
5135 bad_ifunc_reloc:
5136 if (h->root.root.string)
5137 name = h->root.root.string;
5138 else
5139 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
5140 NULL);
5141 _bfd_error_handler
5142 /* xgettext:c-format */
5143 (_("%pB: relocation %s against STT_GNU_IFUNC "
5144 "symbol `%s' isn't handled by %s"), input_bfd,
5145 howto->name, name, __FUNCTION__);
5146 bfd_set_error (bfd_error_bad_value);
5147 return bfd_reloc_notsupported;
5148
5149 case BFD_RELOC_AARCH64_NN:
5150 if (rel->r_addend != 0)
5151 {
5152 if (h->root.root.string)
5153 name = h->root.root.string;
5154 else
5155 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
5156 sym, NULL);
5157 _bfd_error_handler
5158 /* xgettext:c-format */
5159 (_("%pB: relocation %s against STT_GNU_IFUNC "
5160 "symbol `%s' has non-zero addend: %" PRId64),
5161 input_bfd, howto->name, name, (int64_t) rel->r_addend);
5162 bfd_set_error (bfd_error_bad_value);
5163 return bfd_reloc_notsupported;
5164 }
5165
5166 /* Generate dynamic relocation only when there is a
5167 non-GOT reference in a shared object. */
5168 if (bfd_link_pic (info) && h->non_got_ref)
5169 {
5170 Elf_Internal_Rela outrel;
5171 asection *sreloc;
5172
5173 /* Need a dynamic relocation to get the real function
5174 address. */
5175 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
5176 info,
5177 input_section,
5178 rel->r_offset);
5179 if (outrel.r_offset == (bfd_vma) -1
5180 || outrel.r_offset == (bfd_vma) -2)
5181 abort ();
5182
5183 outrel.r_offset += (input_section->output_section->vma
5184 + input_section->output_offset);
5185
5186 if (h->dynindx == -1
5187 || h->forced_local
5188 || bfd_link_executable (info))
5189 {
5190 /* This symbol is resolved locally. */
5191 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
5192 outrel.r_addend = (h->root.u.def.value
5193 + h->root.u.def.section->output_section->vma
5194 + h->root.u.def.section->output_offset);
5195 }
5196 else
5197 {
5198 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
5199 outrel.r_addend = 0;
5200 }
5201
5202 sreloc = globals->root.irelifunc;
5203 elf_append_rela (output_bfd, sreloc, &outrel);
5204
5205 /* If this reloc is against an external symbol, we
5206 do not want to fiddle with the addend. Otherwise,
5207 we need to include the symbol value so that it
5208 becomes an addend for the dynamic reloc. For an
5209 internal symbol, we have updated addend. */
5210 return bfd_reloc_ok;
5211 }
5212 /* FALLTHROUGH */
5213 case BFD_RELOC_AARCH64_CALL26:
5214 case BFD_RELOC_AARCH64_JUMP26:
5215 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5216 signed_addend,
5217 weak_undef_p);
5218 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
5219 howto, value);
5220 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5221 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5222 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
5223 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5224 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
5225 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC:
5226 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
5227 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
5228 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5229 base_got = globals->root.sgot;
5230 off = h->got.offset;
5231
5232 if (base_got == NULL)
5233 abort ();
5234
5235 if (off == (bfd_vma) -1)
5236 {
5237 bfd_vma plt_index;
5238
5239 /* We can't use h->got.offset here to save state, or
5240 even just remember the offset, as finish_dynamic_symbol
5241 would use that as offset into .got. */
5242
5243 if (globals->root.splt != NULL)
5244 {
5245 plt_index = ((h->plt.offset - globals->plt_header_size) /
5246 globals->plt_entry_size);
5247 off = (plt_index + 3) * GOT_ENTRY_SIZE;
5248 base_got = globals->root.sgotplt;
5249 }
5250 else
5251 {
5252 plt_index = h->plt.offset / globals->plt_entry_size;
5253 off = plt_index * GOT_ENTRY_SIZE;
5254 base_got = globals->root.igotplt;
5255 }
5256
5257 if (h->dynindx == -1
5258 || h->forced_local
5259 || info->symbolic)
5260 {
5261 /* This references the local definition. We must
5262 initialize this entry in the global offset table.
5263 Since the offset must always be a multiple of 8,
5264 we use the least significant bit to record
5265 whether we have initialized it already.
5266
5267 When doing a dynamic link, we create a .rela.got
5268 relocation entry to initialize the value. This
5269 is done in the finish_dynamic_symbol routine. */
5270 if ((off & 1) != 0)
5271 off &= ~1;
5272 else
5273 {
5274 bfd_put_NN (output_bfd, value,
5275 base_got->contents + off);
5276 /* Note that this is harmless as -1 | 1 still is -1. */
5277 h->got.offset |= 1;
5278 }
5279 }
5280 value = (base_got->output_section->vma
5281 + base_got->output_offset + off);
5282 }
5283 else
5284 value = aarch64_calculate_got_entry_vma (h, globals, info,
5285 value, output_bfd,
5286 unresolved_reloc_p);
5287
5288 if (aarch64_relocation_aginst_gp_p (bfd_r_type))
5289 addend = (globals->root.sgot->output_section->vma
5290 + globals->root.sgot->output_offset);
5291
5292 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5293 addend, weak_undef_p);
5294 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value);
5295 case BFD_RELOC_AARCH64_ADD_LO12:
5296 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5297 break;
5298 }
5299 }
5300
5301 resolved_to_zero = (h != NULL
5302 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
5303
5304 switch (bfd_r_type)
5305 {
5306 case BFD_RELOC_AARCH64_NONE:
5307 case BFD_RELOC_AARCH64_TLSDESC_ADD:
5308 case BFD_RELOC_AARCH64_TLSDESC_CALL:
5309 case BFD_RELOC_AARCH64_TLSDESC_LDR:
5310 *unresolved_reloc_p = FALSE;
5311 return bfd_reloc_ok;
5312
5313 case BFD_RELOC_AARCH64_NN:
5314
5315 /* When generating a shared object or relocatable executable, these
5316 relocations are copied into the output file to be resolved at
5317 run time. */
5318 if (((bfd_link_pic (info)
5319 || globals->root.is_relocatable_executable)
5320 && (input_section->flags & SEC_ALLOC)
5321 && (h == NULL
5322 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5323 && !resolved_to_zero)
5324 || h->root.type != bfd_link_hash_undefweak))
5325 /* Or we are creating an executable, we may need to keep relocations
5326 for symbols satisfied by a dynamic library if we manage to avoid
5327 copy relocs for the symbol. */
5328 || (ELIMINATE_COPY_RELOCS
5329 && !bfd_link_pic (info)
5330 && h != NULL
5331 && (input_section->flags & SEC_ALLOC)
5332 && h->dynindx != -1
5333 && !h->non_got_ref
5334 && ((h->def_dynamic
5335 && !h->def_regular)
5336 || h->root.type == bfd_link_hash_undefweak
5337 || h->root.type == bfd_link_hash_undefined)))
5338 {
5339 Elf_Internal_Rela outrel;
5340 bfd_byte *loc;
5341 bfd_boolean skip, relocate;
5342 asection *sreloc;
5343
5344 *unresolved_reloc_p = FALSE;
5345
5346 skip = FALSE;
5347 relocate = FALSE;
5348
5349 outrel.r_addend = signed_addend;
5350 outrel.r_offset =
5351 _bfd_elf_section_offset (output_bfd, info, input_section,
5352 rel->r_offset);
5353 if (outrel.r_offset == (bfd_vma) - 1)
5354 skip = TRUE;
5355 else if (outrel.r_offset == (bfd_vma) - 2)
5356 {
5357 skip = TRUE;
5358 relocate = TRUE;
5359 }
5360
5361 outrel.r_offset += (input_section->output_section->vma
5362 + input_section->output_offset);
5363
5364 if (skip)
5365 memset (&outrel, 0, sizeof outrel);
5366 else if (h != NULL
5367 && h->dynindx != -1
5368 && (!bfd_link_pic (info)
5369 || !(bfd_link_pie (info)
5370 || SYMBOLIC_BIND (info, h))
5371 || !h->def_regular))
5372 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
5373 else
5374 {
5375 int symbol;
5376
5377 /* On SVR4-ish systems, the dynamic loader cannot
5378 relocate the text and data segments independently,
5379 so the symbol does not matter. */
5380 symbol = 0;
5381 relocate = globals->no_apply_dynamic_relocs ? FALSE : TRUE;
5382 outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE));
5383 outrel.r_addend += value;
5384 }
5385
5386 sreloc = elf_section_data (input_section)->sreloc;
5387 if (sreloc == NULL || sreloc->contents == NULL)
5388 return bfd_reloc_notsupported;
5389
5390 loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals);
5391 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
5392
5393 if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size)
5394 {
5395 /* Sanity to check that we have previously allocated
5396 sufficient space in the relocation section for the
5397 number of relocations we actually want to emit. */
5398 abort ();
5399 }
5400
5401 /* If this reloc is against an external symbol, we do not want to
5402 fiddle with the addend. Otherwise, we need to include the symbol
5403 value so that it becomes an addend for the dynamic reloc. */
5404 if (!relocate)
5405 return bfd_reloc_ok;
5406
5407 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5408 contents, rel->r_offset, value,
5409 signed_addend);
5410 }
5411 else
5412 value += signed_addend;
5413 break;
5414
5415 case BFD_RELOC_AARCH64_CALL26:
5416 case BFD_RELOC_AARCH64_JUMP26:
5417 {
5418 asection *splt = globals->root.splt;
5419 bfd_boolean via_plt_p =
5420 splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1;
5421
5422 /* A call to an undefined weak symbol is converted to a jump to
5423 the next instruction unless a PLT entry will be created.
5424 The jump to the next instruction is optimized as a NOP.
5425 Do the same for local undefined symbols. */
5426 if (weak_undef_p && ! via_plt_p)
5427 {
5428 bfd_putl32 (INSN_NOP, hit_data);
5429 return bfd_reloc_ok;
5430 }
5431
5432 /* If the call goes through a PLT entry, make sure to
5433 check distance to the right destination address. */
5434 if (via_plt_p)
5435 value = (splt->output_section->vma
5436 + splt->output_offset + h->plt.offset);
5437
5438 /* Check if a stub has to be inserted because the destination
5439 is too far away. */
5440 struct elf_aarch64_stub_hash_entry *stub_entry = NULL;
5441
5442 /* If the branch destination is directed to plt stub, "value" will be
5443 the final destination, otherwise we should plus signed_addend, it may
5444 contain non-zero value, for example call to local function symbol
5445 which are turned into "sec_sym + sec_off", and sec_off is kept in
5446 signed_addend. */
5447 if (! aarch64_valid_branch_p (via_plt_p ? value : value + signed_addend,
5448 place))
5449 /* The target is out of reach, so redirect the branch to
5450 the local stub for this function. */
5451 stub_entry = elfNN_aarch64_get_stub_entry (input_section, sym_sec, h,
5452 rel, globals);
5453 if (stub_entry != NULL)
5454 {
5455 value = (stub_entry->stub_offset
5456 + stub_entry->stub_sec->output_offset
5457 + stub_entry->stub_sec->output_section->vma);
5458
5459 /* We have redirected the destination to stub entry address,
5460 so ignore any addend record in the original rela entry. */
5461 signed_addend = 0;
5462 }
5463 }
5464 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5465 signed_addend, weak_undef_p);
5466 *unresolved_reloc_p = FALSE;
5467 break;
5468
5469 case BFD_RELOC_AARCH64_16_PCREL:
5470 case BFD_RELOC_AARCH64_32_PCREL:
5471 case BFD_RELOC_AARCH64_64_PCREL:
5472 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
5473 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5474 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
5475 case BFD_RELOC_AARCH64_LD_LO19_PCREL:
5476 case BFD_RELOC_AARCH64_MOVW_PREL_G0:
5477 case BFD_RELOC_AARCH64_MOVW_PREL_G0_NC:
5478 case BFD_RELOC_AARCH64_MOVW_PREL_G1:
5479 case BFD_RELOC_AARCH64_MOVW_PREL_G1_NC:
5480 case BFD_RELOC_AARCH64_MOVW_PREL_G2:
5481 case BFD_RELOC_AARCH64_MOVW_PREL_G2_NC:
5482 case BFD_RELOC_AARCH64_MOVW_PREL_G3:
5483 if (bfd_link_pic (info)
5484 && (input_section->flags & SEC_ALLOC) != 0
5485 && (input_section->flags & SEC_READONLY) != 0
5486 && !SYMBOL_REFERENCES_LOCAL (info, h))
5487 {
5488 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
5489
5490 _bfd_error_handler
5491 /* xgettext:c-format */
5492 (_("%pB: relocation %s against symbol `%s' which may bind "
5493 "externally can not be used when making a shared object; "
5494 "recompile with -fPIC"),
5495 input_bfd, elfNN_aarch64_howto_table[howto_index].name,
5496 h->root.root.string);
5497 bfd_set_error (bfd_error_bad_value);
5498 return bfd_reloc_notsupported;
5499 }
5500 /* Fall through. */
5501
5502 case BFD_RELOC_AARCH64_16:
5503 #if ARCH_SIZE == 64
5504 case BFD_RELOC_AARCH64_32:
5505 #endif
5506 case BFD_RELOC_AARCH64_ADD_LO12:
5507 case BFD_RELOC_AARCH64_BRANCH19:
5508 case BFD_RELOC_AARCH64_LDST128_LO12:
5509 case BFD_RELOC_AARCH64_LDST16_LO12:
5510 case BFD_RELOC_AARCH64_LDST32_LO12:
5511 case BFD_RELOC_AARCH64_LDST64_LO12:
5512 case BFD_RELOC_AARCH64_LDST8_LO12:
5513 case BFD_RELOC_AARCH64_MOVW_G0:
5514 case BFD_RELOC_AARCH64_MOVW_G0_NC:
5515 case BFD_RELOC_AARCH64_MOVW_G0_S:
5516 case BFD_RELOC_AARCH64_MOVW_G1:
5517 case BFD_RELOC_AARCH64_MOVW_G1_NC:
5518 case BFD_RELOC_AARCH64_MOVW_G1_S:
5519 case BFD_RELOC_AARCH64_MOVW_G2:
5520 case BFD_RELOC_AARCH64_MOVW_G2_NC:
5521 case BFD_RELOC_AARCH64_MOVW_G2_S:
5522 case BFD_RELOC_AARCH64_MOVW_G3:
5523 case BFD_RELOC_AARCH64_TSTBR14:
5524 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5525 signed_addend, weak_undef_p);
5526 break;
5527
5528 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5529 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5530 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
5531 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5532 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
5533 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5534 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
5535 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC:
5536 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
5537 if (globals->root.sgot == NULL)
5538 BFD_ASSERT (h != NULL);
5539
5540 relative_reloc = FALSE;
5541 if (h != NULL)
5542 {
5543 bfd_vma addend = 0;
5544
5545 /* If a symbol is not dynamic and is not undefined weak, bind it
5546 locally and generate a RELATIVE relocation under PIC mode.
5547
5548 NOTE: one symbol may be referenced by several relocations, we
5549 should only generate one RELATIVE relocation for that symbol.
5550 Therefore, check GOT offset mark first. */
5551 if (h->dynindx == -1
5552 && !h->forced_local
5553 && h->root.type != bfd_link_hash_undefweak
5554 && bfd_link_pic (info)
5555 && !symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5556 relative_reloc = TRUE;
5557
5558 value = aarch64_calculate_got_entry_vma (h, globals, info, value,
5559 output_bfd,
5560 unresolved_reloc_p);
5561 /* Record the GOT entry address which will be used when generating
5562 RELATIVE relocation. */
5563 if (relative_reloc)
5564 got_entry_addr = value;
5565
5566 if (aarch64_relocation_aginst_gp_p (bfd_r_type))
5567 addend = (globals->root.sgot->output_section->vma
5568 + globals->root.sgot->output_offset);
5569 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5570 addend, weak_undef_p);
5571 }
5572 else
5573 {
5574 bfd_vma addend = 0;
5575 struct elf_aarch64_local_symbol *locals
5576 = elf_aarch64_locals (input_bfd);
5577
5578 if (locals == NULL)
5579 {
5580 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
5581 _bfd_error_handler
5582 /* xgettext:c-format */
5583 (_("%pB: local symbol descriptor table be NULL when applying "
5584 "relocation %s against local symbol"),
5585 input_bfd, elfNN_aarch64_howto_table[howto_index].name);
5586 abort ();
5587 }
5588
5589 off = symbol_got_offset (input_bfd, h, r_symndx);
5590 base_got = globals->root.sgot;
5591 got_entry_addr = (base_got->output_section->vma
5592 + base_got->output_offset + off);
5593
5594 if (!symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5595 {
5596 bfd_put_64 (output_bfd, value, base_got->contents + off);
5597
5598 /* For local symbol, we have done absolute relocation in static
5599 linking stage. While for shared library, we need to update the
5600 content of GOT entry according to the shared object's runtime
5601 base address. So, we need to generate a R_AARCH64_RELATIVE reloc
5602 for dynamic linker. */
5603 if (bfd_link_pic (info))
5604 relative_reloc = TRUE;
5605
5606 symbol_got_offset_mark (input_bfd, h, r_symndx);
5607 }
5608
5609 /* Update the relocation value to GOT entry addr as we have transformed
5610 the direct data access into indirect data access through GOT. */
5611 value = got_entry_addr;
5612
5613 if (aarch64_relocation_aginst_gp_p (bfd_r_type))
5614 addend = base_got->output_section->vma + base_got->output_offset;
5615
5616 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5617 addend, weak_undef_p);
5618 }
5619
5620 if (relative_reloc)
5621 {
5622 asection *s;
5623 Elf_Internal_Rela outrel;
5624
5625 s = globals->root.srelgot;
5626 if (s == NULL)
5627 abort ();
5628
5629 outrel.r_offset = got_entry_addr;
5630 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
5631 outrel.r_addend = orig_value;
5632 elf_append_rela (output_bfd, s, &outrel);
5633 }
5634 break;
5635
5636 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5637 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5638 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5639 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5640 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
5641 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
5642 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5643 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
5644 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
5645 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
5646 if (globals->root.sgot == NULL)
5647 return bfd_reloc_notsupported;
5648
5649 value = (symbol_got_offset (input_bfd, h, r_symndx)
5650 + globals->root.sgot->output_section->vma
5651 + globals->root.sgot->output_offset);
5652
5653 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5654 0, weak_undef_p);
5655 *unresolved_reloc_p = FALSE;
5656 break;
5657
5658 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
5659 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
5660 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC:
5661 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1:
5662 if (globals->root.sgot == NULL)
5663 return bfd_reloc_notsupported;
5664
5665 value = symbol_got_offset (input_bfd, h, r_symndx);
5666 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5667 0, weak_undef_p);
5668 *unresolved_reloc_p = FALSE;
5669 break;
5670
5671 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12:
5672 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12:
5673 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC:
5674 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12:
5675 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC:
5676 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12:
5677 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC:
5678 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12:
5679 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC:
5680 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12:
5681 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC:
5682 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0:
5683 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC:
5684 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1:
5685 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC:
5686 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2:
5687 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5688 signed_addend - dtpoff_base (info),
5689 weak_undef_p);
5690 break;
5691
5692 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5693 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5694 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5695 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5696 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5697 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5698 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5699 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5700 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5701 signed_addend - tpoff_base (info),
5702 weak_undef_p);
5703 *unresolved_reloc_p = FALSE;
5704 break;
5705
5706 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12:
5707 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5708 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5709 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
5710 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12:
5711 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5712 if (globals->root.sgot == NULL)
5713 return bfd_reloc_notsupported;
5714 value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
5715 + globals->root.sgotplt->output_section->vma
5716 + globals->root.sgotplt->output_offset
5717 + globals->sgotplt_jump_table_size);
5718
5719 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5720 0, weak_undef_p);
5721 *unresolved_reloc_p = FALSE;
5722 break;
5723
5724 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
5725 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
5726 if (globals->root.sgot == NULL)
5727 return bfd_reloc_notsupported;
5728
5729 value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
5730 + globals->root.sgotplt->output_section->vma
5731 + globals->root.sgotplt->output_offset
5732 + globals->sgotplt_jump_table_size);
5733
5734 value -= (globals->root.sgot->output_section->vma
5735 + globals->root.sgot->output_offset);
5736
5737 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5738 0, weak_undef_p);
5739 *unresolved_reloc_p = FALSE;
5740 break;
5741
5742 default:
5743 return bfd_reloc_notsupported;
5744 }
5745
5746 if (saved_addend)
5747 *saved_addend = value;
5748
5749 /* Only apply the final relocation in a sequence. */
5750 if (save_addend)
5751 return bfd_reloc_continue;
5752
5753 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
5754 howto, value);
5755 }
5756
5757 /* LP64 and ILP32 operates on x- and w-registers respectively.
5758 Next definitions take into account the difference between
5759 corresponding machine codes. R means x-register if the target
5760 arch is LP64, and w-register if the target is ILP32. */
5761
5762 #if ARCH_SIZE == 64
5763 # define add_R0_R0 (0x91000000)
5764 # define add_R0_R0_R1 (0x8b000020)
5765 # define add_R0_R1 (0x91400020)
5766 # define ldr_R0 (0x58000000)
5767 # define ldr_R0_mask(i) (i & 0xffffffe0)
5768 # define ldr_R0_x0 (0xf9400000)
5769 # define ldr_hw_R0 (0xf2a00000)
5770 # define movk_R0 (0xf2800000)
5771 # define movz_R0 (0xd2a00000)
5772 # define movz_hw_R0 (0xd2c00000)
5773 #else /*ARCH_SIZE == 32 */
5774 # define add_R0_R0 (0x11000000)
5775 # define add_R0_R0_R1 (0x0b000020)
5776 # define add_R0_R1 (0x11400020)
5777 # define ldr_R0 (0x18000000)
5778 # define ldr_R0_mask(i) (i & 0xbfffffe0)
5779 # define ldr_R0_x0 (0xb9400000)
5780 # define ldr_hw_R0 (0x72a00000)
5781 # define movk_R0 (0x72800000)
5782 # define movz_R0 (0x52a00000)
5783 # define movz_hw_R0 (0x52c00000)
5784 #endif
5785
5786 /* Handle TLS relaxations. Relaxing is possible for symbols that use
5787 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
5788 link.
5789
5790 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
5791 is to then call final_link_relocate. Return other values in the
5792 case of error. */
5793
5794 static bfd_reloc_status_type
5795 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals,
5796 bfd *input_bfd, bfd_byte *contents,
5797 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h)
5798 {
5799 bfd_boolean is_local = h == NULL;
5800 unsigned int r_type = ELFNN_R_TYPE (rel->r_info);
5801 unsigned long insn;
5802
5803 BFD_ASSERT (globals && input_bfd && contents && rel);
5804
5805 switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type))
5806 {
5807 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5808 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5809 if (is_local)
5810 {
5811 /* GD->LE relaxation:
5812 adrp x0, :tlsgd:var => movz R0, :tprel_g1:var
5813 or
5814 adrp x0, :tlsdesc:var => movz R0, :tprel_g1:var
5815
5816 Where R is x for LP64, and w for ILP32. */
5817 bfd_putl32 (movz_R0, contents + rel->r_offset);
5818 return bfd_reloc_continue;
5819 }
5820 else
5821 {
5822 /* GD->IE relaxation:
5823 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
5824 or
5825 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
5826 */
5827 return bfd_reloc_continue;
5828 }
5829
5830 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5831 BFD_ASSERT (0);
5832 break;
5833
5834 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5835 if (is_local)
5836 {
5837 /* Tiny TLSDESC->LE relaxation:
5838 ldr x1, :tlsdesc:var => movz R0, #:tprel_g1:var
5839 adr x0, :tlsdesc:var => movk R0, #:tprel_g0_nc:var
5840 .tlsdesccall var
5841 blr x1 => nop
5842
5843 Where R is x for LP64, and w for ILP32. */
5844 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
5845 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
5846
5847 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5848 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC));
5849 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5850
5851 bfd_putl32 (movz_R0, contents + rel->r_offset);
5852 bfd_putl32 (movk_R0, contents + rel->r_offset + 4);
5853 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
5854 return bfd_reloc_continue;
5855 }
5856 else
5857 {
5858 /* Tiny TLSDESC->IE relaxation:
5859 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
5860 adr x0, :tlsdesc:var => nop
5861 .tlsdesccall var
5862 blr x1 => nop
5863 */
5864 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
5865 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
5866
5867 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5868 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5869
5870 bfd_putl32 (ldr_R0, contents + rel->r_offset);
5871 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4);
5872 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
5873 return bfd_reloc_continue;
5874 }
5875
5876 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5877 if (is_local)
5878 {
5879 /* Tiny GD->LE relaxation:
5880 adr x0, :tlsgd:var => mrs x1, tpidr_el0
5881 bl __tls_get_addr => add R0, R1, #:tprel_hi12:x, lsl #12
5882 nop => add R0, R0, #:tprel_lo12_nc:x
5883
5884 Where R is x for LP64, and x for Ilp32. */
5885
5886 /* First kill the tls_get_addr reloc on the bl instruction. */
5887 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5888
5889 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 0);
5890 bfd_putl32 (add_R0_R1, contents + rel->r_offset + 4);
5891 bfd_putl32 (add_R0_R0, contents + rel->r_offset + 8);
5892
5893 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5894 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC));
5895 rel[1].r_offset = rel->r_offset + 8;
5896
5897 /* Move the current relocation to the second instruction in
5898 the sequence. */
5899 rel->r_offset += 4;
5900 rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5901 AARCH64_R (TLSLE_ADD_TPREL_HI12));
5902 return bfd_reloc_continue;
5903 }
5904 else
5905 {
5906 /* Tiny GD->IE relaxation:
5907 adr x0, :tlsgd:var => ldr R0, :gottprel:var
5908 bl __tls_get_addr => mrs x1, tpidr_el0
5909 nop => add R0, R0, R1
5910
5911 Where R is x for LP64, and w for Ilp32. */
5912
5913 /* First kill the tls_get_addr reloc on the bl instruction. */
5914 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5915 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5916
5917 bfd_putl32 (ldr_R0, contents + rel->r_offset);
5918 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
5919 bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 8);
5920 return bfd_reloc_continue;
5921 }
5922
5923 #if ARCH_SIZE == 64
5924 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
5925 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSGD_MOVW_G0_NC));
5926 BFD_ASSERT (rel->r_offset + 12 == rel[2].r_offset);
5927 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (CALL26));
5928
5929 if (is_local)
5930 {
5931 /* Large GD->LE relaxation:
5932 movz x0, #:tlsgd_g1:var => movz x0, #:tprel_g2:var, lsl #32
5933 movk x0, #:tlsgd_g0_nc:var => movk x0, #:tprel_g1_nc:var, lsl #16
5934 add x0, gp, x0 => movk x0, #:tprel_g0_nc:var
5935 bl __tls_get_addr => mrs x1, tpidr_el0
5936 nop => add x0, x0, x1
5937 */
5938 rel[2].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5939 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC));
5940 rel[2].r_offset = rel->r_offset + 8;
5941
5942 bfd_putl32 (movz_hw_R0, contents + rel->r_offset + 0);
5943 bfd_putl32 (ldr_hw_R0, contents + rel->r_offset + 4);
5944 bfd_putl32 (movk_R0, contents + rel->r_offset + 8);
5945 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 12);
5946 bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 16);
5947 }
5948 else
5949 {
5950 /* Large GD->IE relaxation:
5951 movz x0, #:tlsgd_g1:var => movz x0, #:gottprel_g1:var, lsl #16
5952 movk x0, #:tlsgd_g0_nc:var => movk x0, #:gottprel_g0_nc:var
5953 add x0, gp, x0 => ldr x0, [gp, x0]
5954 bl __tls_get_addr => mrs x1, tpidr_el0
5955 nop => add x0, x0, x1
5956 */
5957 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5958 bfd_putl32 (0xd2a80000, contents + rel->r_offset + 0);
5959 bfd_putl32 (ldr_R0, contents + rel->r_offset + 8);
5960 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 12);
5961 bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 16);
5962 }
5963 return bfd_reloc_continue;
5964
5965 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
5966 return bfd_reloc_continue;
5967 #endif
5968
5969 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5970 return bfd_reloc_continue;
5971
5972 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
5973 if (is_local)
5974 {
5975 /* GD->LE relaxation:
5976 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
5977
5978 Where R is x for lp64 mode, and w for ILP32 mode. */
5979 bfd_putl32 (movk_R0, contents + rel->r_offset);
5980 return bfd_reloc_continue;
5981 }
5982 else
5983 {
5984 /* GD->IE relaxation:
5985 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr R0, [x0, #:gottprel_lo12:var]
5986
5987 Where R is x for lp64 mode, and w for ILP32 mode. */
5988 insn = bfd_getl32 (contents + rel->r_offset);
5989 bfd_putl32 (ldr_R0_mask (insn), contents + rel->r_offset);
5990 return bfd_reloc_continue;
5991 }
5992
5993 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5994 if (is_local)
5995 {
5996 /* GD->LE relaxation
5997 add x0, #:tlsgd_lo12:var => movk R0, :tprel_g0_nc:var
5998 bl __tls_get_addr => mrs x1, tpidr_el0
5999 nop => add R0, R1, R0
6000
6001 Where R is x for lp64 mode, and w for ILP32 mode. */
6002
6003 /* First kill the tls_get_addr reloc on the bl instruction. */
6004 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
6005 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6006
6007 bfd_putl32 (movk_R0, contents + rel->r_offset);
6008 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
6009 bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 8);
6010 return bfd_reloc_continue;
6011 }
6012 else
6013 {
6014 /* GD->IE relaxation
6015 ADD x0, #:tlsgd_lo12:var => ldr R0, [x0, #:gottprel_lo12:var]
6016 BL __tls_get_addr => mrs x1, tpidr_el0
6017 R_AARCH64_CALL26
6018 NOP => add R0, R1, R0
6019
6020 Where R is x for lp64 mode, and w for ilp32 mode. */
6021
6022 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
6023
6024 /* Remove the relocation on the BL instruction. */
6025 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6026
6027 /* We choose to fixup the BL and NOP instructions using the
6028 offset from the second relocation to allow flexibility in
6029 scheduling instructions between the ADD and BL. */
6030 bfd_putl32 (ldr_R0_x0, contents + rel->r_offset);
6031 bfd_putl32 (0xd53bd041, contents + rel[1].r_offset);
6032 bfd_putl32 (add_R0_R0_R1, contents + rel[1].r_offset + 4);
6033 return bfd_reloc_continue;
6034 }
6035
6036 case BFD_RELOC_AARCH64_TLSDESC_ADD:
6037 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12:
6038 case BFD_RELOC_AARCH64_TLSDESC_CALL:
6039 /* GD->IE/LE relaxation:
6040 add x0, x0, #:tlsdesc_lo12:var => nop
6041 blr xd => nop
6042 */
6043 bfd_putl32 (INSN_NOP, contents + rel->r_offset);
6044 return bfd_reloc_ok;
6045
6046 case BFD_RELOC_AARCH64_TLSDESC_LDR:
6047 if (is_local)
6048 {
6049 /* GD->LE relaxation:
6050 ldr xd, [gp, xn] => movk R0, #:tprel_g0_nc:var
6051
6052 Where R is x for lp64 mode, and w for ILP32 mode. */
6053 bfd_putl32 (movk_R0, contents + rel->r_offset);
6054 return bfd_reloc_continue;
6055 }
6056 else
6057 {
6058 /* GD->IE relaxation:
6059 ldr xd, [gp, xn] => ldr R0, [gp, xn]
6060
6061 Where R is x for lp64 mode, and w for ILP32 mode. */
6062 insn = bfd_getl32 (contents + rel->r_offset);
6063 bfd_putl32 (ldr_R0_mask (insn), contents + rel->r_offset);
6064 return bfd_reloc_ok;
6065 }
6066
6067 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
6068 /* GD->LE relaxation:
6069 movk xd, #:tlsdesc_off_g0_nc:var => movk R0, #:tprel_g1_nc:var, lsl #16
6070 GD->IE relaxation:
6071 movk xd, #:tlsdesc_off_g0_nc:var => movk Rd, #:gottprel_g0_nc:var
6072
6073 Where R is x for lp64 mode, and w for ILP32 mode. */
6074 if (is_local)
6075 bfd_putl32 (ldr_hw_R0, contents + rel->r_offset);
6076 return bfd_reloc_continue;
6077
6078 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
6079 if (is_local)
6080 {
6081 /* GD->LE relaxation:
6082 movz xd, #:tlsdesc_off_g1:var => movz R0, #:tprel_g2:var, lsl #32
6083
6084 Where R is x for lp64 mode, and w for ILP32 mode. */
6085 bfd_putl32 (movz_hw_R0, contents + rel->r_offset);
6086 return bfd_reloc_continue;
6087 }
6088 else
6089 {
6090 /* GD->IE relaxation:
6091 movz xd, #:tlsdesc_off_g1:var => movz Rd, #:gottprel_g1:var, lsl #16
6092
6093 Where R is x for lp64 mode, and w for ILP32 mode. */
6094 insn = bfd_getl32 (contents + rel->r_offset);
6095 bfd_putl32 (movz_R0 | (insn & 0x1f), contents + rel->r_offset);
6096 return bfd_reloc_continue;
6097 }
6098
6099 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
6100 /* IE->LE relaxation:
6101 adrp xd, :gottprel:var => movz Rd, :tprel_g1:var
6102
6103 Where R is x for lp64 mode, and w for ILP32 mode. */
6104 if (is_local)
6105 {
6106 insn = bfd_getl32 (contents + rel->r_offset);
6107 bfd_putl32 (movz_R0 | (insn & 0x1f), contents + rel->r_offset);
6108 }
6109 return bfd_reloc_continue;
6110
6111 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
6112 /* IE->LE relaxation:
6113 ldr xd, [xm, #:gottprel_lo12:var] => movk Rd, :tprel_g0_nc:var
6114
6115 Where R is x for lp64 mode, and w for ILP32 mode. */
6116 if (is_local)
6117 {
6118 insn = bfd_getl32 (contents + rel->r_offset);
6119 bfd_putl32 (movk_R0 | (insn & 0x1f), contents + rel->r_offset);
6120 }
6121 return bfd_reloc_continue;
6122
6123 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
6124 /* LD->LE relaxation (tiny):
6125 adr x0, :tlsldm:x => mrs x0, tpidr_el0
6126 bl __tls_get_addr => add R0, R0, TCB_SIZE
6127
6128 Where R is x for lp64 mode, and w for ilp32 mode. */
6129 if (is_local)
6130 {
6131 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
6132 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
6133 /* No need of CALL26 relocation for tls_get_addr. */
6134 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6135 bfd_putl32 (0xd53bd040, contents + rel->r_offset + 0);
6136 bfd_putl32 (add_R0_R0 | (TCB_SIZE << 10),
6137 contents + rel->r_offset + 4);
6138 return bfd_reloc_ok;
6139 }
6140 return bfd_reloc_continue;
6141
6142 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
6143 /* LD->LE relaxation (small):
6144 adrp x0, :tlsldm:x => mrs x0, tpidr_el0
6145 */
6146 if (is_local)
6147 {
6148 bfd_putl32 (0xd53bd040, contents + rel->r_offset);
6149 return bfd_reloc_ok;
6150 }
6151 return bfd_reloc_continue;
6152
6153 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
6154 /* LD->LE relaxation (small):
6155 add x0, #:tlsldm_lo12:x => add R0, R0, TCB_SIZE
6156 bl __tls_get_addr => nop
6157
6158 Where R is x for lp64 mode, and w for ilp32 mode. */
6159 if (is_local)
6160 {
6161 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
6162 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
6163 /* No need of CALL26 relocation for tls_get_addr. */
6164 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6165 bfd_putl32 (add_R0_R0 | (TCB_SIZE << 10),
6166 contents + rel->r_offset + 0);
6167 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4);
6168 return bfd_reloc_ok;
6169 }
6170 return bfd_reloc_continue;
6171
6172 default:
6173 return bfd_reloc_continue;
6174 }
6175
6176 return bfd_reloc_ok;
6177 }
6178
6179 /* Relocate an AArch64 ELF section. */
6180
6181 static bfd_boolean
6182 elfNN_aarch64_relocate_section (bfd *output_bfd,
6183 struct bfd_link_info *info,
6184 bfd *input_bfd,
6185 asection *input_section,
6186 bfd_byte *contents,
6187 Elf_Internal_Rela *relocs,
6188 Elf_Internal_Sym *local_syms,
6189 asection **local_sections)
6190 {
6191 Elf_Internal_Shdr *symtab_hdr;
6192 struct elf_link_hash_entry **sym_hashes;
6193 Elf_Internal_Rela *rel;
6194 Elf_Internal_Rela *relend;
6195 const char *name;
6196 struct elf_aarch64_link_hash_table *globals;
6197 bfd_boolean save_addend = FALSE;
6198 bfd_vma addend = 0;
6199
6200 globals = elf_aarch64_hash_table (info);
6201
6202 symtab_hdr = &elf_symtab_hdr (input_bfd);
6203 sym_hashes = elf_sym_hashes (input_bfd);
6204
6205 rel = relocs;
6206 relend = relocs + input_section->reloc_count;
6207 for (; rel < relend; rel++)
6208 {
6209 unsigned int r_type;
6210 bfd_reloc_code_real_type bfd_r_type;
6211 bfd_reloc_code_real_type relaxed_bfd_r_type;
6212 reloc_howto_type *howto;
6213 unsigned long r_symndx;
6214 Elf_Internal_Sym *sym;
6215 asection *sec;
6216 struct elf_link_hash_entry *h;
6217 bfd_vma relocation;
6218 bfd_reloc_status_type r;
6219 arelent bfd_reloc;
6220 char sym_type;
6221 bfd_boolean unresolved_reloc = FALSE;
6222 char *error_message = NULL;
6223
6224 r_symndx = ELFNN_R_SYM (rel->r_info);
6225 r_type = ELFNN_R_TYPE (rel->r_info);
6226
6227 bfd_reloc.howto = elfNN_aarch64_howto_from_type (input_bfd, r_type);
6228 howto = bfd_reloc.howto;
6229
6230 if (howto == NULL)
6231 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
6232
6233 bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto);
6234
6235 h = NULL;
6236 sym = NULL;
6237 sec = NULL;
6238
6239 if (r_symndx < symtab_hdr->sh_info)
6240 {
6241 sym = local_syms + r_symndx;
6242 sym_type = ELFNN_ST_TYPE (sym->st_info);
6243 sec = local_sections[r_symndx];
6244
6245 /* An object file might have a reference to a local
6246 undefined symbol. This is a daft object file, but we
6247 should at least do something about it. */
6248 if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL
6249 && bfd_is_und_section (sec)
6250 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
6251 (*info->callbacks->undefined_symbol)
6252 (info, bfd_elf_string_from_elf_section
6253 (input_bfd, symtab_hdr->sh_link, sym->st_name),
6254 input_bfd, input_section, rel->r_offset, TRUE);
6255
6256 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6257
6258 /* Relocate against local STT_GNU_IFUNC symbol. */
6259 if (!bfd_link_relocatable (info)
6260 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
6261 {
6262 h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd,
6263 rel, FALSE);
6264 if (h == NULL)
6265 abort ();
6266
6267 /* Set STT_GNU_IFUNC symbol value. */
6268 h->root.u.def.value = sym->st_value;
6269 h->root.u.def.section = sec;
6270 }
6271 }
6272 else
6273 {
6274 bfd_boolean warned, ignored;
6275
6276 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6277 r_symndx, symtab_hdr, sym_hashes,
6278 h, sec, relocation,
6279 unresolved_reloc, warned, ignored);
6280
6281 sym_type = h->type;
6282 }
6283
6284 if (sec != NULL && discarded_section (sec))
6285 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
6286 rel, 1, relend, howto, 0, contents);
6287
6288 if (bfd_link_relocatable (info))
6289 continue;
6290
6291 if (h != NULL)
6292 name = h->root.root.string;
6293 else
6294 {
6295 name = (bfd_elf_string_from_elf_section
6296 (input_bfd, symtab_hdr->sh_link, sym->st_name));
6297 if (name == NULL || *name == '\0')
6298 name = bfd_section_name (input_bfd, sec);
6299 }
6300
6301 if (r_symndx != 0
6302 && r_type != R_AARCH64_NONE
6303 && r_type != R_AARCH64_NULL
6304 && (h == NULL
6305 || h->root.type == bfd_link_hash_defined
6306 || h->root.type == bfd_link_hash_defweak)
6307 && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS))
6308 {
6309 _bfd_error_handler
6310 ((sym_type == STT_TLS
6311 /* xgettext:c-format */
6312 ? _("%pB(%pA+%#" PRIx64 "): %s used with TLS symbol %s")
6313 /* xgettext:c-format */
6314 : _("%pB(%pA+%#" PRIx64 "): %s used with non-TLS symbol %s")),
6315 input_bfd,
6316 input_section, (uint64_t) rel->r_offset, howto->name, name);
6317 }
6318
6319 /* We relax only if we can see that there can be a valid transition
6320 from a reloc type to another.
6321 We call elfNN_aarch64_final_link_relocate unless we're completely
6322 done, i.e., the relaxation produced the final output we want. */
6323
6324 relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type,
6325 h, r_symndx);
6326 if (relaxed_bfd_r_type != bfd_r_type)
6327 {
6328 bfd_r_type = relaxed_bfd_r_type;
6329 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
6330 BFD_ASSERT (howto != NULL);
6331 r_type = howto->type;
6332 r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h);
6333 unresolved_reloc = 0;
6334 }
6335 else
6336 r = bfd_reloc_continue;
6337
6338 /* There may be multiple consecutive relocations for the
6339 same offset. In that case we are supposed to treat the
6340 output of each relocation as the addend for the next. */
6341 if (rel + 1 < relend
6342 && rel->r_offset == rel[1].r_offset
6343 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE
6344 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL)
6345 save_addend = TRUE;
6346 else
6347 save_addend = FALSE;
6348
6349 if (r == bfd_reloc_continue)
6350 r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd,
6351 input_section, contents, rel,
6352 relocation, info, sec,
6353 h, &unresolved_reloc,
6354 save_addend, &addend, sym);
6355
6356 switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type))
6357 {
6358 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
6359 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
6360 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
6361 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
6362 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
6363 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
6364 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
6365 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
6366 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
6367 {
6368 bfd_boolean need_relocs = FALSE;
6369 bfd_byte *loc;
6370 int indx;
6371 bfd_vma off;
6372
6373 off = symbol_got_offset (input_bfd, h, r_symndx);
6374 indx = h && h->dynindx != -1 ? h->dynindx : 0;
6375
6376 need_relocs =
6377 (!bfd_link_executable (info) || indx != 0) &&
6378 (h == NULL
6379 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6380 || h->root.type != bfd_link_hash_undefweak);
6381
6382 BFD_ASSERT (globals->root.srelgot != NULL);
6383
6384 if (need_relocs)
6385 {
6386 Elf_Internal_Rela rela;
6387 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD));
6388 rela.r_addend = 0;
6389 rela.r_offset = globals->root.sgot->output_section->vma +
6390 globals->root.sgot->output_offset + off;
6391
6392
6393 loc = globals->root.srelgot->contents;
6394 loc += globals->root.srelgot->reloc_count++
6395 * RELOC_SIZE (htab);
6396 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6397
6398 bfd_reloc_code_real_type real_type =
6399 elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type);
6400
6401 if (real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
6402 || real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
6403 || real_type == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC)
6404 {
6405 /* For local dynamic, don't generate DTPREL in any case.
6406 Initialize the DTPREL slot into zero, so we get module
6407 base address when invoke runtime TLS resolver. */
6408 bfd_put_NN (output_bfd, 0,
6409 globals->root.sgot->contents + off
6410 + GOT_ENTRY_SIZE);
6411 }
6412 else if (indx == 0)
6413 {
6414 bfd_put_NN (output_bfd,
6415 relocation - dtpoff_base (info),
6416 globals->root.sgot->contents + off
6417 + GOT_ENTRY_SIZE);
6418 }
6419 else
6420 {
6421 /* This TLS symbol is global. We emit a
6422 relocation to fixup the tls offset at load
6423 time. */
6424 rela.r_info =
6425 ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL));
6426 rela.r_addend = 0;
6427 rela.r_offset =
6428 (globals->root.sgot->output_section->vma
6429 + globals->root.sgot->output_offset + off
6430 + GOT_ENTRY_SIZE);
6431
6432 loc = globals->root.srelgot->contents;
6433 loc += globals->root.srelgot->reloc_count++
6434 * RELOC_SIZE (globals);
6435 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6436 bfd_put_NN (output_bfd, (bfd_vma) 0,
6437 globals->root.sgot->contents + off
6438 + GOT_ENTRY_SIZE);
6439 }
6440 }
6441 else
6442 {
6443 bfd_put_NN (output_bfd, (bfd_vma) 1,
6444 globals->root.sgot->contents + off);
6445 bfd_put_NN (output_bfd,
6446 relocation - dtpoff_base (info),
6447 globals->root.sgot->contents + off
6448 + GOT_ENTRY_SIZE);
6449 }
6450
6451 symbol_got_offset_mark (input_bfd, h, r_symndx);
6452 }
6453 break;
6454
6455 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
6456 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
6457 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
6458 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC:
6459 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1:
6460 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
6461 {
6462 bfd_boolean need_relocs = FALSE;
6463 bfd_byte *loc;
6464 int indx;
6465 bfd_vma off;
6466
6467 off = symbol_got_offset (input_bfd, h, r_symndx);
6468
6469 indx = h && h->dynindx != -1 ? h->dynindx : 0;
6470
6471 need_relocs =
6472 (!bfd_link_executable (info) || indx != 0) &&
6473 (h == NULL
6474 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6475 || h->root.type != bfd_link_hash_undefweak);
6476
6477 BFD_ASSERT (globals->root.srelgot != NULL);
6478
6479 if (need_relocs)
6480 {
6481 Elf_Internal_Rela rela;
6482
6483 if (indx == 0)
6484 rela.r_addend = relocation - dtpoff_base (info);
6485 else
6486 rela.r_addend = 0;
6487
6488 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL));
6489 rela.r_offset = globals->root.sgot->output_section->vma +
6490 globals->root.sgot->output_offset + off;
6491
6492 loc = globals->root.srelgot->contents;
6493 loc += globals->root.srelgot->reloc_count++
6494 * RELOC_SIZE (htab);
6495
6496 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6497
6498 bfd_put_NN (output_bfd, rela.r_addend,
6499 globals->root.sgot->contents + off);
6500 }
6501 else
6502 bfd_put_NN (output_bfd, relocation - tpoff_base (info),
6503 globals->root.sgot->contents + off);
6504
6505 symbol_got_offset_mark (input_bfd, h, r_symndx);
6506 }
6507 break;
6508
6509 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12:
6510 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
6511 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
6512 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
6513 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
6514 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
6515 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
6516 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx))
6517 {
6518 bfd_boolean need_relocs = FALSE;
6519 int indx = h && h->dynindx != -1 ? h->dynindx : 0;
6520 bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx);
6521
6522 need_relocs = (h == NULL
6523 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6524 || h->root.type != bfd_link_hash_undefweak);
6525
6526 BFD_ASSERT (globals->root.srelgot != NULL);
6527 BFD_ASSERT (globals->root.sgot != NULL);
6528
6529 if (need_relocs)
6530 {
6531 bfd_byte *loc;
6532 Elf_Internal_Rela rela;
6533 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC));
6534
6535 rela.r_addend = 0;
6536 rela.r_offset = (globals->root.sgotplt->output_section->vma
6537 + globals->root.sgotplt->output_offset
6538 + off + globals->sgotplt_jump_table_size);
6539
6540 if (indx == 0)
6541 rela.r_addend = relocation - dtpoff_base (info);
6542
6543 /* Allocate the next available slot in the PLT reloc
6544 section to hold our R_AARCH64_TLSDESC, the next
6545 available slot is determined from reloc_count,
6546 which we step. But note, reloc_count was
6547 artifically moved down while allocating slots for
6548 real PLT relocs such that all of the PLT relocs
6549 will fit above the initial reloc_count and the
6550 extra stuff will fit below. */
6551 loc = globals->root.srelplt->contents;
6552 loc += globals->root.srelplt->reloc_count++
6553 * RELOC_SIZE (globals);
6554
6555 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6556
6557 bfd_put_NN (output_bfd, (bfd_vma) 0,
6558 globals->root.sgotplt->contents + off +
6559 globals->sgotplt_jump_table_size);
6560 bfd_put_NN (output_bfd, (bfd_vma) 0,
6561 globals->root.sgotplt->contents + off +
6562 globals->sgotplt_jump_table_size +
6563 GOT_ENTRY_SIZE);
6564 }
6565
6566 symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx);
6567 }
6568 break;
6569 default:
6570 break;
6571 }
6572
6573 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
6574 because such sections are not SEC_ALLOC and thus ld.so will
6575 not process them. */
6576 if (unresolved_reloc
6577 && !((input_section->flags & SEC_DEBUGGING) != 0
6578 && h->def_dynamic)
6579 && _bfd_elf_section_offset (output_bfd, info, input_section,
6580 +rel->r_offset) != (bfd_vma) - 1)
6581 {
6582 _bfd_error_handler
6583 /* xgettext:c-format */
6584 (_("%pB(%pA+%#" PRIx64 "): "
6585 "unresolvable %s relocation against symbol `%s'"),
6586 input_bfd, input_section, (uint64_t) rel->r_offset, howto->name,
6587 h->root.root.string);
6588 return FALSE;
6589 }
6590
6591 if (r != bfd_reloc_ok && r != bfd_reloc_continue)
6592 {
6593 bfd_reloc_code_real_type real_r_type
6594 = elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type);
6595
6596 switch (r)
6597 {
6598 case bfd_reloc_overflow:
6599 (*info->callbacks->reloc_overflow)
6600 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
6601 input_bfd, input_section, rel->r_offset);
6602 if (real_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
6603 || real_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14)
6604 {
6605 (*info->callbacks->warning)
6606 (info,
6607 _("too many GOT entries for -fpic, "
6608 "please recompile with -fPIC"),
6609 name, input_bfd, input_section, rel->r_offset);
6610 return FALSE;
6611 }
6612 /* Overflow can occur when a variable is referenced with a type
6613 that has a larger alignment than the type with which it was
6614 declared. eg:
6615 file1.c: extern int foo; int a (void) { return foo; }
6616 file2.c: char bar, foo, baz;
6617 If the variable is placed into a data section at an offset
6618 that is incompatible with the larger alignment requirement
6619 overflow will occur. (Strictly speaking this is not overflow
6620 but rather an alignment problem, but the bfd_reloc_ error
6621 enum does not have a value to cover that situation).
6622
6623 Try to catch this situation here and provide a more helpful
6624 error message to the user. */
6625 if (addend & ((1 << howto->rightshift) - 1)
6626 /* FIXME: Are we testing all of the appropriate reloc
6627 types here ? */
6628 && (real_r_type == BFD_RELOC_AARCH64_LD_LO19_PCREL
6629 || real_r_type == BFD_RELOC_AARCH64_LDST16_LO12
6630 || real_r_type == BFD_RELOC_AARCH64_LDST32_LO12
6631 || real_r_type == BFD_RELOC_AARCH64_LDST64_LO12
6632 || real_r_type == BFD_RELOC_AARCH64_LDST128_LO12))
6633 {
6634 info->callbacks->warning
6635 (info, _("one possible cause of this error is that the \
6636 symbol is being referenced in the indicated code as if it had a larger \
6637 alignment than was declared where it was defined"),
6638 name, input_bfd, input_section, rel->r_offset);
6639 }
6640 break;
6641
6642 case bfd_reloc_undefined:
6643 (*info->callbacks->undefined_symbol)
6644 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
6645 break;
6646
6647 case bfd_reloc_outofrange:
6648 error_message = _("out of range");
6649 goto common_error;
6650
6651 case bfd_reloc_notsupported:
6652 error_message = _("unsupported relocation");
6653 goto common_error;
6654
6655 case bfd_reloc_dangerous:
6656 /* error_message should already be set. */
6657 goto common_error;
6658
6659 default:
6660 error_message = _("unknown error");
6661 /* Fall through. */
6662
6663 common_error:
6664 BFD_ASSERT (error_message != NULL);
6665 (*info->callbacks->reloc_dangerous)
6666 (info, error_message, input_bfd, input_section, rel->r_offset);
6667 break;
6668 }
6669 }
6670
6671 if (!save_addend)
6672 addend = 0;
6673 }
6674
6675 return TRUE;
6676 }
6677
6678 /* Set the right machine number. */
6679
6680 static bfd_boolean
6681 elfNN_aarch64_object_p (bfd *abfd)
6682 {
6683 #if ARCH_SIZE == 32
6684 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32);
6685 #else
6686 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64);
6687 #endif
6688 return TRUE;
6689 }
6690
6691 /* Function to keep AArch64 specific flags in the ELF header. */
6692
6693 static bfd_boolean
6694 elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags)
6695 {
6696 if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags)
6697 {
6698 }
6699 else
6700 {
6701 elf_elfheader (abfd)->e_flags = flags;
6702 elf_flags_init (abfd) = TRUE;
6703 }
6704
6705 return TRUE;
6706 }
6707
6708 /* Merge backend specific data from an object file to the output
6709 object file when linking. */
6710
6711 static bfd_boolean
6712 elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
6713 {
6714 bfd *obfd = info->output_bfd;
6715 flagword out_flags;
6716 flagword in_flags;
6717 bfd_boolean flags_compatible = TRUE;
6718 asection *sec;
6719
6720 /* Check if we have the same endianess. */
6721 if (!_bfd_generic_verify_endian_match (ibfd, info))
6722 return FALSE;
6723
6724 if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd))
6725 return TRUE;
6726
6727 /* The input BFD must have had its flags initialised. */
6728 /* The following seems bogus to me -- The flags are initialized in
6729 the assembler but I don't think an elf_flags_init field is
6730 written into the object. */
6731 /* BFD_ASSERT (elf_flags_init (ibfd)); */
6732
6733 in_flags = elf_elfheader (ibfd)->e_flags;
6734 out_flags = elf_elfheader (obfd)->e_flags;
6735
6736 if (!elf_flags_init (obfd))
6737 {
6738 /* If the input is the default architecture and had the default
6739 flags then do not bother setting the flags for the output
6740 architecture, instead allow future merges to do this. If no
6741 future merges ever set these flags then they will retain their
6742 uninitialised values, which surprise surprise, correspond
6743 to the default values. */
6744 if (bfd_get_arch_info (ibfd)->the_default
6745 && elf_elfheader (ibfd)->e_flags == 0)
6746 return TRUE;
6747
6748 elf_flags_init (obfd) = TRUE;
6749 elf_elfheader (obfd)->e_flags = in_flags;
6750
6751 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
6752 && bfd_get_arch_info (obfd)->the_default)
6753 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
6754 bfd_get_mach (ibfd));
6755
6756 return TRUE;
6757 }
6758
6759 /* Identical flags must be compatible. */
6760 if (in_flags == out_flags)
6761 return TRUE;
6762
6763 /* Check to see if the input BFD actually contains any sections. If
6764 not, its flags may not have been initialised either, but it
6765 cannot actually cause any incompatiblity. Do not short-circuit
6766 dynamic objects; their section list may be emptied by
6767 elf_link_add_object_symbols.
6768
6769 Also check to see if there are no code sections in the input.
6770 In this case there is no need to check for code specific flags.
6771 XXX - do we need to worry about floating-point format compatability
6772 in data sections ? */
6773 if (!(ibfd->flags & DYNAMIC))
6774 {
6775 bfd_boolean null_input_bfd = TRUE;
6776 bfd_boolean only_data_sections = TRUE;
6777
6778 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6779 {
6780 if ((bfd_get_section_flags (ibfd, sec)
6781 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
6782 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
6783 only_data_sections = FALSE;
6784
6785 null_input_bfd = FALSE;
6786 break;
6787 }
6788
6789 if (null_input_bfd || only_data_sections)
6790 return TRUE;
6791 }
6792
6793 return flags_compatible;
6794 }
6795
6796 /* Display the flags field. */
6797
6798 static bfd_boolean
6799 elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr)
6800 {
6801 FILE *file = (FILE *) ptr;
6802 unsigned long flags;
6803
6804 BFD_ASSERT (abfd != NULL && ptr != NULL);
6805
6806 /* Print normal ELF private data. */
6807 _bfd_elf_print_private_bfd_data (abfd, ptr);
6808
6809 flags = elf_elfheader (abfd)->e_flags;
6810 /* Ignore init flag - it may not be set, despite the flags field
6811 containing valid data. */
6812
6813 /* xgettext:c-format */
6814 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
6815
6816 if (flags)
6817 fprintf (file, _("<Unrecognised flag bits set>"));
6818
6819 fputc ('\n', file);
6820
6821 return TRUE;
6822 }
6823
6824 /* Find dynamic relocs for H that apply to read-only sections. */
6825
6826 static asection *
6827 readonly_dynrelocs (struct elf_link_hash_entry *h)
6828 {
6829 struct elf_dyn_relocs *p;
6830
6831 for (p = elf_aarch64_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
6832 {
6833 asection *s = p->sec->output_section;
6834
6835 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6836 return p->sec;
6837 }
6838 return NULL;
6839 }
6840
6841 /* Return true if we need copy relocation against EH. */
6842
6843 static bfd_boolean
6844 need_copy_relocation_p (struct elf_aarch64_link_hash_entry *eh)
6845 {
6846 struct elf_dyn_relocs *p;
6847 asection *s;
6848
6849 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6850 {
6851 /* If there is any pc-relative reference, we need to keep copy relocation
6852 to avoid propagating the relocation into runtime that current glibc
6853 does not support. */
6854 if (p->pc_count)
6855 return TRUE;
6856
6857 s = p->sec->output_section;
6858 /* Need copy relocation if it's against read-only section. */
6859 if (s != NULL && (s->flags & SEC_READONLY) != 0)
6860 return TRUE;
6861 }
6862
6863 return FALSE;
6864 }
6865
6866 /* Adjust a symbol defined by a dynamic object and referenced by a
6867 regular object. The current definition is in some section of the
6868 dynamic object, but we're not including those sections. We have to
6869 change the definition to something the rest of the link can
6870 understand. */
6871
6872 static bfd_boolean
6873 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info,
6874 struct elf_link_hash_entry *h)
6875 {
6876 struct elf_aarch64_link_hash_table *htab;
6877 asection *s, *srel;
6878
6879 /* If this is a function, put it in the procedure linkage table. We
6880 will fill in the contents of the procedure linkage table later,
6881 when we know the address of the .got section. */
6882 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
6883 {
6884 if (h->plt.refcount <= 0
6885 || (h->type != STT_GNU_IFUNC
6886 && (SYMBOL_CALLS_LOCAL (info, h)
6887 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6888 && h->root.type == bfd_link_hash_undefweak))))
6889 {
6890 /* This case can occur if we saw a CALL26 reloc in
6891 an input file, but the symbol wasn't referred to
6892 by a dynamic object or all references were
6893 garbage collected. In which case we can end up
6894 resolving. */
6895 h->plt.offset = (bfd_vma) - 1;
6896 h->needs_plt = 0;
6897 }
6898
6899 return TRUE;
6900 }
6901 else
6902 /* Otherwise, reset to -1. */
6903 h->plt.offset = (bfd_vma) - 1;
6904
6905
6906 /* If this is a weak symbol, and there is a real definition, the
6907 processor independent code will have arranged for us to see the
6908 real definition first, and we can just use the same value. */
6909 if (h->is_weakalias)
6910 {
6911 struct elf_link_hash_entry *def = weakdef (h);
6912 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
6913 h->root.u.def.section = def->root.u.def.section;
6914 h->root.u.def.value = def->root.u.def.value;
6915 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
6916 h->non_got_ref = def->non_got_ref;
6917 return TRUE;
6918 }
6919
6920 /* If we are creating a shared library, we must presume that the
6921 only references to the symbol are via the global offset table.
6922 For such cases we need not do anything here; the relocations will
6923 be handled correctly by relocate_section. */
6924 if (bfd_link_pic (info))
6925 return TRUE;
6926
6927 /* If there are no references to this symbol that do not use the
6928 GOT, we don't need to generate a copy reloc. */
6929 if (!h->non_got_ref)
6930 return TRUE;
6931
6932 /* If -z nocopyreloc was given, we won't generate them either. */
6933 if (info->nocopyreloc)
6934 {
6935 h->non_got_ref = 0;
6936 return TRUE;
6937 }
6938
6939 if (ELIMINATE_COPY_RELOCS)
6940 {
6941 struct elf_aarch64_link_hash_entry *eh;
6942 /* If we don't find any dynamic relocs in read-only sections, then
6943 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6944 eh = (struct elf_aarch64_link_hash_entry *) h;
6945 if (!need_copy_relocation_p (eh))
6946 {
6947 h->non_got_ref = 0;
6948 return TRUE;
6949 }
6950 }
6951
6952 /* We must allocate the symbol in our .dynbss section, which will
6953 become part of the .bss section of the executable. There will be
6954 an entry for this symbol in the .dynsym section. The dynamic
6955 object will contain position independent code, so all references
6956 from the dynamic object to this symbol will go through the global
6957 offset table. The dynamic linker will use the .dynsym entry to
6958 determine the address it must put in the global offset table, so
6959 both the dynamic object and the regular object will refer to the
6960 same memory location for the variable. */
6961
6962 htab = elf_aarch64_hash_table (info);
6963
6964 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
6965 to copy the initial value out of the dynamic object and into the
6966 runtime process image. */
6967 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
6968 {
6969 s = htab->root.sdynrelro;
6970 srel = htab->root.sreldynrelro;
6971 }
6972 else
6973 {
6974 s = htab->root.sdynbss;
6975 srel = htab->root.srelbss;
6976 }
6977 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6978 {
6979 srel->size += RELOC_SIZE (htab);
6980 h->needs_copy = 1;
6981 }
6982
6983 return _bfd_elf_adjust_dynamic_copy (info, h, s);
6984
6985 }
6986
6987 static bfd_boolean
6988 elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number)
6989 {
6990 struct elf_aarch64_local_symbol *locals;
6991 locals = elf_aarch64_locals (abfd);
6992 if (locals == NULL)
6993 {
6994 locals = (struct elf_aarch64_local_symbol *)
6995 bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol));
6996 if (locals == NULL)
6997 return FALSE;
6998 elf_aarch64_locals (abfd) = locals;
6999 }
7000 return TRUE;
7001 }
7002
7003 /* Create the .got section to hold the global offset table. */
7004
7005 static bfd_boolean
7006 aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
7007 {
7008 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7009 flagword flags;
7010 asection *s;
7011 struct elf_link_hash_entry *h;
7012 struct elf_link_hash_table *htab = elf_hash_table (info);
7013
7014 /* This function may be called more than once. */
7015 if (htab->sgot != NULL)
7016 return TRUE;
7017
7018 flags = bed->dynamic_sec_flags;
7019
7020 s = bfd_make_section_anyway_with_flags (abfd,
7021 (bed->rela_plts_and_copies_p
7022 ? ".rela.got" : ".rel.got"),
7023 (bed->dynamic_sec_flags
7024 | SEC_READONLY));
7025 if (s == NULL
7026 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
7027 return FALSE;
7028 htab->srelgot = s;
7029
7030 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
7031 if (s == NULL
7032 || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
7033 return FALSE;
7034 htab->sgot = s;
7035 htab->sgot->size += GOT_ENTRY_SIZE;
7036
7037 if (bed->want_got_sym)
7038 {
7039 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
7040 (or .got.plt) section. We don't do this in the linker script
7041 because we don't want to define the symbol if we are not creating
7042 a global offset table. */
7043 h = _bfd_elf_define_linkage_sym (abfd, info, s,
7044 "_GLOBAL_OFFSET_TABLE_");
7045 elf_hash_table (info)->hgot = h;
7046 if (h == NULL)
7047 return FALSE;
7048 }
7049
7050 if (bed->want_got_plt)
7051 {
7052 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
7053 if (s == NULL
7054 || !bfd_set_section_alignment (abfd, s,
7055 bed->s->log_file_align))
7056 return FALSE;
7057 htab->sgotplt = s;
7058 }
7059
7060 /* The first bit of the global offset table is the header. */
7061 s->size += bed->got_header_size;
7062
7063 return TRUE;
7064 }
7065
7066 /* Look through the relocs for a section during the first phase. */
7067
7068 static bfd_boolean
7069 elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
7070 asection *sec, const Elf_Internal_Rela *relocs)
7071 {
7072 Elf_Internal_Shdr *symtab_hdr;
7073 struct elf_link_hash_entry **sym_hashes;
7074 const Elf_Internal_Rela *rel;
7075 const Elf_Internal_Rela *rel_end;
7076 asection *sreloc;
7077
7078 struct elf_aarch64_link_hash_table *htab;
7079
7080 if (bfd_link_relocatable (info))
7081 return TRUE;
7082
7083 BFD_ASSERT (is_aarch64_elf (abfd));
7084
7085 htab = elf_aarch64_hash_table (info);
7086 sreloc = NULL;
7087
7088 symtab_hdr = &elf_symtab_hdr (abfd);
7089 sym_hashes = elf_sym_hashes (abfd);
7090
7091 rel_end = relocs + sec->reloc_count;
7092 for (rel = relocs; rel < rel_end; rel++)
7093 {
7094 struct elf_link_hash_entry *h;
7095 unsigned int r_symndx;
7096 unsigned int r_type;
7097 bfd_reloc_code_real_type bfd_r_type;
7098 Elf_Internal_Sym *isym;
7099
7100 r_symndx = ELFNN_R_SYM (rel->r_info);
7101 r_type = ELFNN_R_TYPE (rel->r_info);
7102
7103 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
7104 {
7105 /* xgettext:c-format */
7106 _bfd_error_handler (_("%pB: bad symbol index: %d"), abfd, r_symndx);
7107 return FALSE;
7108 }
7109
7110 if (r_symndx < symtab_hdr->sh_info)
7111 {
7112 /* A local symbol. */
7113 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
7114 abfd, r_symndx);
7115 if (isym == NULL)
7116 return FALSE;
7117
7118 /* Check relocation against local STT_GNU_IFUNC symbol. */
7119 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
7120 {
7121 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel,
7122 TRUE);
7123 if (h == NULL)
7124 return FALSE;
7125
7126 /* Fake a STT_GNU_IFUNC symbol. */
7127 h->type = STT_GNU_IFUNC;
7128 h->def_regular = 1;
7129 h->ref_regular = 1;
7130 h->forced_local = 1;
7131 h->root.type = bfd_link_hash_defined;
7132 }
7133 else
7134 h = NULL;
7135 }
7136 else
7137 {
7138 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7139 while (h->root.type == bfd_link_hash_indirect
7140 || h->root.type == bfd_link_hash_warning)
7141 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7142 }
7143
7144 /* Could be done earlier, if h were already available. */
7145 bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx);
7146
7147 if (h != NULL)
7148 {
7149 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
7150 This shows up in particular in an R_AARCH64_PREL64 in large model
7151 when calculating the pc-relative address to .got section which is
7152 used to initialize the gp register. */
7153 if (h->root.root.string
7154 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
7155 {
7156 if (htab->root.dynobj == NULL)
7157 htab->root.dynobj = abfd;
7158
7159 if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
7160 return FALSE;
7161
7162 BFD_ASSERT (h == htab->root.hgot);
7163 }
7164
7165 /* Create the ifunc sections for static executables. If we
7166 never see an indirect function symbol nor we are building
7167 a static executable, those sections will be empty and
7168 won't appear in output. */
7169 switch (bfd_r_type)
7170 {
7171 default:
7172 break;
7173
7174 case BFD_RELOC_AARCH64_ADD_LO12:
7175 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
7176 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
7177 case BFD_RELOC_AARCH64_CALL26:
7178 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
7179 case BFD_RELOC_AARCH64_JUMP26:
7180 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
7181 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
7182 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
7183 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
7184 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
7185 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC:
7186 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
7187 case BFD_RELOC_AARCH64_NN:
7188 if (htab->root.dynobj == NULL)
7189 htab->root.dynobj = abfd;
7190 if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info))
7191 return FALSE;
7192 break;
7193 }
7194
7195 /* It is referenced by a non-shared object. */
7196 h->ref_regular = 1;
7197 }
7198
7199 switch (bfd_r_type)
7200 {
7201 case BFD_RELOC_AARCH64_16:
7202 #if ARCH_SIZE == 64
7203 case BFD_RELOC_AARCH64_32:
7204 #endif
7205 if (bfd_link_pic (info) && (sec->flags & SEC_ALLOC) != 0)
7206 {
7207 if (h != NULL
7208 /* This is an absolute symbol. It represents a value instead
7209 of an address. */
7210 && ((h->root.type == bfd_link_hash_defined
7211 && bfd_is_abs_section (h->root.u.def.section))
7212 /* This is an undefined symbol. */
7213 || h->root.type == bfd_link_hash_undefined))
7214 break;
7215
7216 /* For local symbols, defined global symbols in a non-ABS section,
7217 it is assumed that the value is an address. */
7218 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
7219 _bfd_error_handler
7220 /* xgettext:c-format */
7221 (_("%pB: relocation %s against `%s' can not be used when making "
7222 "a shared object"),
7223 abfd, elfNN_aarch64_howto_table[howto_index].name,
7224 (h) ? h->root.root.string : "a local symbol");
7225 bfd_set_error (bfd_error_bad_value);
7226 return FALSE;
7227 }
7228 else
7229 break;
7230
7231 case BFD_RELOC_AARCH64_MOVW_G0_NC:
7232 case BFD_RELOC_AARCH64_MOVW_G1_NC:
7233 case BFD_RELOC_AARCH64_MOVW_G2_NC:
7234 case BFD_RELOC_AARCH64_MOVW_G3:
7235 if (bfd_link_pic (info))
7236 {
7237 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
7238 _bfd_error_handler
7239 /* xgettext:c-format */
7240 (_("%pB: relocation %s against `%s' can not be used when making "
7241 "a shared object; recompile with -fPIC"),
7242 abfd, elfNN_aarch64_howto_table[howto_index].name,
7243 (h) ? h->root.root.string : "a local symbol");
7244 bfd_set_error (bfd_error_bad_value);
7245 return FALSE;
7246 }
7247 /* Fall through. */
7248
7249 case BFD_RELOC_AARCH64_16_PCREL:
7250 case BFD_RELOC_AARCH64_32_PCREL:
7251 case BFD_RELOC_AARCH64_64_PCREL:
7252 case BFD_RELOC_AARCH64_ADD_LO12:
7253 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
7254 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
7255 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
7256 case BFD_RELOC_AARCH64_LDST128_LO12:
7257 case BFD_RELOC_AARCH64_LDST16_LO12:
7258 case BFD_RELOC_AARCH64_LDST32_LO12:
7259 case BFD_RELOC_AARCH64_LDST64_LO12:
7260 case BFD_RELOC_AARCH64_LDST8_LO12:
7261 case BFD_RELOC_AARCH64_LD_LO19_PCREL:
7262 if (h == NULL || bfd_link_pic (info))
7263 break;
7264 /* Fall through. */
7265
7266 case BFD_RELOC_AARCH64_NN:
7267
7268 /* We don't need to handle relocs into sections not going into
7269 the "real" output. */
7270 if ((sec->flags & SEC_ALLOC) == 0)
7271 break;
7272
7273 if (h != NULL)
7274 {
7275 if (!bfd_link_pic (info))
7276 h->non_got_ref = 1;
7277
7278 h->plt.refcount += 1;
7279 h->pointer_equality_needed = 1;
7280 }
7281
7282 /* No need to do anything if we're not creating a shared
7283 object. */
7284 if (!(bfd_link_pic (info)
7285 /* If on the other hand, we are creating an executable, we
7286 may need to keep relocations for symbols satisfied by a
7287 dynamic library if we manage to avoid copy relocs for the
7288 symbol.
7289
7290 NOTE: Currently, there is no support of copy relocs
7291 elimination on pc-relative relocation types, because there is
7292 no dynamic relocation support for them in glibc. We still
7293 record the dynamic symbol reference for them. This is
7294 because one symbol may be referenced by both absolute
7295 relocation (for example, BFD_RELOC_AARCH64_NN) and
7296 pc-relative relocation. We need full symbol reference
7297 information to make correct decision later in
7298 elfNN_aarch64_adjust_dynamic_symbol. */
7299 || (ELIMINATE_COPY_RELOCS
7300 && !bfd_link_pic (info)
7301 && h != NULL
7302 && (h->root.type == bfd_link_hash_defweak
7303 || !h->def_regular))))
7304 break;
7305
7306 {
7307 struct elf_dyn_relocs *p;
7308 struct elf_dyn_relocs **head;
7309 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
7310
7311 /* We must copy these reloc types into the output file.
7312 Create a reloc section in dynobj and make room for
7313 this reloc. */
7314 if (sreloc == NULL)
7315 {
7316 if (htab->root.dynobj == NULL)
7317 htab->root.dynobj = abfd;
7318
7319 sreloc = _bfd_elf_make_dynamic_reloc_section
7320 (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE);
7321
7322 if (sreloc == NULL)
7323 return FALSE;
7324 }
7325
7326 /* If this is a global symbol, we count the number of
7327 relocations we need for this symbol. */
7328 if (h != NULL)
7329 {
7330 struct elf_aarch64_link_hash_entry *eh;
7331 eh = (struct elf_aarch64_link_hash_entry *) h;
7332 head = &eh->dyn_relocs;
7333 }
7334 else
7335 {
7336 /* Track dynamic relocs needed for local syms too.
7337 We really need local syms available to do this
7338 easily. Oh well. */
7339
7340 asection *s;
7341 void **vpp;
7342
7343 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
7344 abfd, r_symndx);
7345 if (isym == NULL)
7346 return FALSE;
7347
7348 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
7349 if (s == NULL)
7350 s = sec;
7351
7352 /* Beware of type punned pointers vs strict aliasing
7353 rules. */
7354 vpp = &(elf_section_data (s)->local_dynrel);
7355 head = (struct elf_dyn_relocs **) vpp;
7356 }
7357
7358 p = *head;
7359 if (p == NULL || p->sec != sec)
7360 {
7361 bfd_size_type amt = sizeof *p;
7362 p = ((struct elf_dyn_relocs *)
7363 bfd_zalloc (htab->root.dynobj, amt));
7364 if (p == NULL)
7365 return FALSE;
7366 p->next = *head;
7367 *head = p;
7368 p->sec = sec;
7369 }
7370
7371 p->count += 1;
7372
7373 if (elfNN_aarch64_howto_table[howto_index].pc_relative)
7374 p->pc_count += 1;
7375 }
7376 break;
7377
7378 /* RR: We probably want to keep a consistency check that
7379 there are no dangling GOT_PAGE relocs. */
7380 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
7381 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
7382 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
7383 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
7384 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
7385 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
7386 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
7387 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC:
7388 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
7389 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12:
7390 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
7391 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
7392 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
7393 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12:
7394 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
7395 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
7396 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
7397 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
7398 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
7399 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
7400 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
7401 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
7402 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
7403 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
7404 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
7405 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
7406 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC:
7407 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1:
7408 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
7409 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
7410 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
7411 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
7412 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
7413 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
7414 {
7415 unsigned got_type;
7416 unsigned old_got_type;
7417
7418 got_type = aarch64_reloc_got_type (bfd_r_type);
7419
7420 if (h)
7421 {
7422 h->got.refcount += 1;
7423 old_got_type = elf_aarch64_hash_entry (h)->got_type;
7424 }
7425 else
7426 {
7427 struct elf_aarch64_local_symbol *locals;
7428
7429 if (!elfNN_aarch64_allocate_local_symbols
7430 (abfd, symtab_hdr->sh_info))
7431 return FALSE;
7432
7433 locals = elf_aarch64_locals (abfd);
7434 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
7435 locals[r_symndx].got_refcount += 1;
7436 old_got_type = locals[r_symndx].got_type;
7437 }
7438
7439 /* If a variable is accessed with both general dynamic TLS
7440 methods, two slots may be created. */
7441 if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type))
7442 got_type |= old_got_type;
7443
7444 /* We will already have issued an error message if there
7445 is a TLS/non-TLS mismatch, based on the symbol type.
7446 So just combine any TLS types needed. */
7447 if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL
7448 && got_type != GOT_NORMAL)
7449 got_type |= old_got_type;
7450
7451 /* If the symbol is accessed by both IE and GD methods, we
7452 are able to relax. Turn off the GD flag, without
7453 messing up with any other kind of TLS types that may be
7454 involved. */
7455 if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type))
7456 got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD);
7457
7458 if (old_got_type != got_type)
7459 {
7460 if (h != NULL)
7461 elf_aarch64_hash_entry (h)->got_type = got_type;
7462 else
7463 {
7464 struct elf_aarch64_local_symbol *locals;
7465 locals = elf_aarch64_locals (abfd);
7466 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
7467 locals[r_symndx].got_type = got_type;
7468 }
7469 }
7470
7471 if (htab->root.dynobj == NULL)
7472 htab->root.dynobj = abfd;
7473 if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
7474 return FALSE;
7475 break;
7476 }
7477
7478 case BFD_RELOC_AARCH64_CALL26:
7479 case BFD_RELOC_AARCH64_JUMP26:
7480 /* If this is a local symbol then we resolve it
7481 directly without creating a PLT entry. */
7482 if (h == NULL)
7483 continue;
7484
7485 h->needs_plt = 1;
7486 if (h->plt.refcount <= 0)
7487 h->plt.refcount = 1;
7488 else
7489 h->plt.refcount += 1;
7490 break;
7491
7492 default:
7493 break;
7494 }
7495 }
7496
7497 return TRUE;
7498 }
7499
7500 /* Treat mapping symbols as special target symbols. */
7501
7502 static bfd_boolean
7503 elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED,
7504 asymbol *sym)
7505 {
7506 return bfd_is_aarch64_special_symbol_name (sym->name,
7507 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY);
7508 }
7509
7510 /* This is a copy of elf_find_function () from elf.c except that
7511 AArch64 mapping symbols are ignored when looking for function names. */
7512
7513 static bfd_boolean
7514 aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
7515 asymbol **symbols,
7516 asection *section,
7517 bfd_vma offset,
7518 const char **filename_ptr,
7519 const char **functionname_ptr)
7520 {
7521 const char *filename = NULL;
7522 asymbol *func = NULL;
7523 bfd_vma low_func = 0;
7524 asymbol **p;
7525
7526 for (p = symbols; *p != NULL; p++)
7527 {
7528 elf_symbol_type *q;
7529
7530 q = (elf_symbol_type *) * p;
7531
7532 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
7533 {
7534 default:
7535 break;
7536 case STT_FILE:
7537 filename = bfd_asymbol_name (&q->symbol);
7538 break;
7539 case STT_FUNC:
7540 case STT_NOTYPE:
7541 /* Skip mapping symbols. */
7542 if ((q->symbol.flags & BSF_LOCAL)
7543 && (bfd_is_aarch64_special_symbol_name
7544 (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY)))
7545 continue;
7546 /* Fall through. */
7547 if (bfd_get_section (&q->symbol) == section
7548 && q->symbol.value >= low_func && q->symbol.value <= offset)
7549 {
7550 func = (asymbol *) q;
7551 low_func = q->symbol.value;
7552 }
7553 break;
7554 }
7555 }
7556
7557 if (func == NULL)
7558 return FALSE;
7559
7560 if (filename_ptr)
7561 *filename_ptr = filename;
7562 if (functionname_ptr)
7563 *functionname_ptr = bfd_asymbol_name (func);
7564
7565 return TRUE;
7566 }
7567
7568
7569 /* Find the nearest line to a particular section and offset, for error
7570 reporting. This code is a duplicate of the code in elf.c, except
7571 that it uses aarch64_elf_find_function. */
7572
7573 static bfd_boolean
7574 elfNN_aarch64_find_nearest_line (bfd *abfd,
7575 asymbol **symbols,
7576 asection *section,
7577 bfd_vma offset,
7578 const char **filename_ptr,
7579 const char **functionname_ptr,
7580 unsigned int *line_ptr,
7581 unsigned int *discriminator_ptr)
7582 {
7583 bfd_boolean found = FALSE;
7584
7585 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
7586 filename_ptr, functionname_ptr,
7587 line_ptr, discriminator_ptr,
7588 dwarf_debug_sections, 0,
7589 &elf_tdata (abfd)->dwarf2_find_line_info))
7590 {
7591 if (!*functionname_ptr)
7592 aarch64_elf_find_function (abfd, symbols, section, offset,
7593 *filename_ptr ? NULL : filename_ptr,
7594 functionname_ptr);
7595
7596 return TRUE;
7597 }
7598
7599 /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64
7600 toolchain uses DWARF1. */
7601
7602 if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7603 &found, filename_ptr,
7604 functionname_ptr, line_ptr,
7605 &elf_tdata (abfd)->line_info))
7606 return FALSE;
7607
7608 if (found && (*functionname_ptr || *line_ptr))
7609 return TRUE;
7610
7611 if (symbols == NULL)
7612 return FALSE;
7613
7614 if (!aarch64_elf_find_function (abfd, symbols, section, offset,
7615 filename_ptr, functionname_ptr))
7616 return FALSE;
7617
7618 *line_ptr = 0;
7619 return TRUE;
7620 }
7621
7622 static bfd_boolean
7623 elfNN_aarch64_find_inliner_info (bfd *abfd,
7624 const char **filename_ptr,
7625 const char **functionname_ptr,
7626 unsigned int *line_ptr)
7627 {
7628 bfd_boolean found;
7629 found = _bfd_dwarf2_find_inliner_info
7630 (abfd, filename_ptr,
7631 functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info);
7632 return found;
7633 }
7634
7635
7636 static void
7637 elfNN_aarch64_post_process_headers (bfd *abfd,
7638 struct bfd_link_info *link_info)
7639 {
7640 Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
7641
7642 i_ehdrp = elf_elfheader (abfd);
7643 i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION;
7644
7645 _bfd_elf_post_process_headers (abfd, link_info);
7646 }
7647
7648 static enum elf_reloc_type_class
7649 elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
7650 const asection *rel_sec ATTRIBUTE_UNUSED,
7651 const Elf_Internal_Rela *rela)
7652 {
7653 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
7654
7655 if (htab->root.dynsym != NULL
7656 && htab->root.dynsym->contents != NULL)
7657 {
7658 /* Check relocation against STT_GNU_IFUNC symbol if there are
7659 dynamic symbols. */
7660 bfd *abfd = info->output_bfd;
7661 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7662 unsigned long r_symndx = ELFNN_R_SYM (rela->r_info);
7663 if (r_symndx != STN_UNDEF)
7664 {
7665 Elf_Internal_Sym sym;
7666 if (!bed->s->swap_symbol_in (abfd,
7667 (htab->root.dynsym->contents
7668 + r_symndx * bed->s->sizeof_sym),
7669 0, &sym))
7670 {
7671 /* xgettext:c-format */
7672 _bfd_error_handler (_("%pB symbol number %lu references"
7673 " nonexistent SHT_SYMTAB_SHNDX section"),
7674 abfd, r_symndx);
7675 /* Ideally an error class should be returned here. */
7676 }
7677 else if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
7678 return reloc_class_ifunc;
7679 }
7680 }
7681
7682 switch ((int) ELFNN_R_TYPE (rela->r_info))
7683 {
7684 case AARCH64_R (IRELATIVE):
7685 return reloc_class_ifunc;
7686 case AARCH64_R (RELATIVE):
7687 return reloc_class_relative;
7688 case AARCH64_R (JUMP_SLOT):
7689 return reloc_class_plt;
7690 case AARCH64_R (COPY):
7691 return reloc_class_copy;
7692 default:
7693 return reloc_class_normal;
7694 }
7695 }
7696
7697 /* Handle an AArch64 specific section when reading an object file. This is
7698 called when bfd_section_from_shdr finds a section with an unknown
7699 type. */
7700
7701 static bfd_boolean
7702 elfNN_aarch64_section_from_shdr (bfd *abfd,
7703 Elf_Internal_Shdr *hdr,
7704 const char *name, int shindex)
7705 {
7706 /* There ought to be a place to keep ELF backend specific flags, but
7707 at the moment there isn't one. We just keep track of the
7708 sections by their name, instead. Fortunately, the ABI gives
7709 names for all the AArch64 specific sections, so we will probably get
7710 away with this. */
7711 switch (hdr->sh_type)
7712 {
7713 case SHT_AARCH64_ATTRIBUTES:
7714 break;
7715
7716 default:
7717 return FALSE;
7718 }
7719
7720 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
7721 return FALSE;
7722
7723 return TRUE;
7724 }
7725
7726 /* A structure used to record a list of sections, independently
7727 of the next and prev fields in the asection structure. */
7728 typedef struct section_list
7729 {
7730 asection *sec;
7731 struct section_list *next;
7732 struct section_list *prev;
7733 }
7734 section_list;
7735
7736 /* Unfortunately we need to keep a list of sections for which
7737 an _aarch64_elf_section_data structure has been allocated. This
7738 is because it is possible for functions like elfNN_aarch64_write_section
7739 to be called on a section which has had an elf_data_structure
7740 allocated for it (and so the used_by_bfd field is valid) but
7741 for which the AArch64 extended version of this structure - the
7742 _aarch64_elf_section_data structure - has not been allocated. */
7743 static section_list *sections_with_aarch64_elf_section_data = NULL;
7744
7745 static void
7746 record_section_with_aarch64_elf_section_data (asection *sec)
7747 {
7748 struct section_list *entry;
7749
7750 entry = bfd_malloc (sizeof (*entry));
7751 if (entry == NULL)
7752 return;
7753 entry->sec = sec;
7754 entry->next = sections_with_aarch64_elf_section_data;
7755 entry->prev = NULL;
7756 if (entry->next != NULL)
7757 entry->next->prev = entry;
7758 sections_with_aarch64_elf_section_data = entry;
7759 }
7760
7761 static struct section_list *
7762 find_aarch64_elf_section_entry (asection *sec)
7763 {
7764 struct section_list *entry;
7765 static struct section_list *last_entry = NULL;
7766
7767 /* This is a short cut for the typical case where the sections are added
7768 to the sections_with_aarch64_elf_section_data list in forward order and
7769 then looked up here in backwards order. This makes a real difference
7770 to the ld-srec/sec64k.exp linker test. */
7771 entry = sections_with_aarch64_elf_section_data;
7772 if (last_entry != NULL)
7773 {
7774 if (last_entry->sec == sec)
7775 entry = last_entry;
7776 else if (last_entry->next != NULL && last_entry->next->sec == sec)
7777 entry = last_entry->next;
7778 }
7779
7780 for (; entry; entry = entry->next)
7781 if (entry->sec == sec)
7782 break;
7783
7784 if (entry)
7785 /* Record the entry prior to this one - it is the entry we are
7786 most likely to want to locate next time. Also this way if we
7787 have been called from
7788 unrecord_section_with_aarch64_elf_section_data () we will not
7789 be caching a pointer that is about to be freed. */
7790 last_entry = entry->prev;
7791
7792 return entry;
7793 }
7794
7795 static void
7796 unrecord_section_with_aarch64_elf_section_data (asection *sec)
7797 {
7798 struct section_list *entry;
7799
7800 entry = find_aarch64_elf_section_entry (sec);
7801
7802 if (entry)
7803 {
7804 if (entry->prev != NULL)
7805 entry->prev->next = entry->next;
7806 if (entry->next != NULL)
7807 entry->next->prev = entry->prev;
7808 if (entry == sections_with_aarch64_elf_section_data)
7809 sections_with_aarch64_elf_section_data = entry->next;
7810 free (entry);
7811 }
7812 }
7813
7814
7815 typedef struct
7816 {
7817 void *finfo;
7818 struct bfd_link_info *info;
7819 asection *sec;
7820 int sec_shndx;
7821 int (*func) (void *, const char *, Elf_Internal_Sym *,
7822 asection *, struct elf_link_hash_entry *);
7823 } output_arch_syminfo;
7824
7825 enum map_symbol_type
7826 {
7827 AARCH64_MAP_INSN,
7828 AARCH64_MAP_DATA
7829 };
7830
7831
7832 /* Output a single mapping symbol. */
7833
7834 static bfd_boolean
7835 elfNN_aarch64_output_map_sym (output_arch_syminfo *osi,
7836 enum map_symbol_type type, bfd_vma offset)
7837 {
7838 static const char *names[2] = { "$x", "$d" };
7839 Elf_Internal_Sym sym;
7840
7841 sym.st_value = (osi->sec->output_section->vma
7842 + osi->sec->output_offset + offset);
7843 sym.st_size = 0;
7844 sym.st_other = 0;
7845 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
7846 sym.st_shndx = osi->sec_shndx;
7847 return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1;
7848 }
7849
7850 /* Output a single local symbol for a generated stub. */
7851
7852 static bfd_boolean
7853 elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name,
7854 bfd_vma offset, bfd_vma size)
7855 {
7856 Elf_Internal_Sym sym;
7857
7858 sym.st_value = (osi->sec->output_section->vma
7859 + osi->sec->output_offset + offset);
7860 sym.st_size = size;
7861 sym.st_other = 0;
7862 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7863 sym.st_shndx = osi->sec_shndx;
7864 return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1;
7865 }
7866
7867 static bfd_boolean
7868 aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7869 {
7870 struct elf_aarch64_stub_hash_entry *stub_entry;
7871 asection *stub_sec;
7872 bfd_vma addr;
7873 char *stub_name;
7874 output_arch_syminfo *osi;
7875
7876 /* Massage our args to the form they really have. */
7877 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
7878 osi = (output_arch_syminfo *) in_arg;
7879
7880 stub_sec = stub_entry->stub_sec;
7881
7882 /* Ensure this stub is attached to the current section being
7883 processed. */
7884 if (stub_sec != osi->sec)
7885 return TRUE;
7886
7887 addr = (bfd_vma) stub_entry->stub_offset;
7888
7889 stub_name = stub_entry->output_name;
7890
7891 switch (stub_entry->stub_type)
7892 {
7893 case aarch64_stub_adrp_branch:
7894 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
7895 sizeof (aarch64_adrp_branch_stub)))
7896 return FALSE;
7897 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7898 return FALSE;
7899 break;
7900 case aarch64_stub_long_branch:
7901 if (!elfNN_aarch64_output_stub_sym
7902 (osi, stub_name, addr, sizeof (aarch64_long_branch_stub)))
7903 return FALSE;
7904 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7905 return FALSE;
7906 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16))
7907 return FALSE;
7908 break;
7909 case aarch64_stub_erratum_835769_veneer:
7910 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
7911 sizeof (aarch64_erratum_835769_stub)))
7912 return FALSE;
7913 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7914 return FALSE;
7915 break;
7916 case aarch64_stub_erratum_843419_veneer:
7917 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
7918 sizeof (aarch64_erratum_843419_stub)))
7919 return FALSE;
7920 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7921 return FALSE;
7922 break;
7923
7924 default:
7925 abort ();
7926 }
7927
7928 return TRUE;
7929 }
7930
7931 /* Output mapping symbols for linker generated sections. */
7932
7933 static bfd_boolean
7934 elfNN_aarch64_output_arch_local_syms (bfd *output_bfd,
7935 struct bfd_link_info *info,
7936 void *finfo,
7937 int (*func) (void *, const char *,
7938 Elf_Internal_Sym *,
7939 asection *,
7940 struct elf_link_hash_entry
7941 *))
7942 {
7943 output_arch_syminfo osi;
7944 struct elf_aarch64_link_hash_table *htab;
7945
7946 htab = elf_aarch64_hash_table (info);
7947
7948 osi.finfo = finfo;
7949 osi.info = info;
7950 osi.func = func;
7951
7952 /* Long calls stubs. */
7953 if (htab->stub_bfd && htab->stub_bfd->sections)
7954 {
7955 asection *stub_sec;
7956
7957 for (stub_sec = htab->stub_bfd->sections;
7958 stub_sec != NULL; stub_sec = stub_sec->next)
7959 {
7960 /* Ignore non-stub sections. */
7961 if (!strstr (stub_sec->name, STUB_SUFFIX))
7962 continue;
7963
7964 osi.sec = stub_sec;
7965
7966 osi.sec_shndx = _bfd_elf_section_from_bfd_section
7967 (output_bfd, osi.sec->output_section);
7968
7969 /* The first instruction in a stub is always a branch. */
7970 if (!elfNN_aarch64_output_map_sym (&osi, AARCH64_MAP_INSN, 0))
7971 return FALSE;
7972
7973 bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub,
7974 &osi);
7975 }
7976 }
7977
7978 /* Finally, output mapping symbols for the PLT. */
7979 if (!htab->root.splt || htab->root.splt->size == 0)
7980 return TRUE;
7981
7982 osi.sec_shndx = _bfd_elf_section_from_bfd_section
7983 (output_bfd, htab->root.splt->output_section);
7984 osi.sec = htab->root.splt;
7985
7986 elfNN_aarch64_output_map_sym (&osi, AARCH64_MAP_INSN, 0);
7987
7988 return TRUE;
7989
7990 }
7991
7992 /* Allocate target specific section data. */
7993
7994 static bfd_boolean
7995 elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec)
7996 {
7997 if (!sec->used_by_bfd)
7998 {
7999 _aarch64_elf_section_data *sdata;
8000 bfd_size_type amt = sizeof (*sdata);
8001
8002 sdata = bfd_zalloc (abfd, amt);
8003 if (sdata == NULL)
8004 return FALSE;
8005 sec->used_by_bfd = sdata;
8006 }
8007
8008 record_section_with_aarch64_elf_section_data (sec);
8009
8010 return _bfd_elf_new_section_hook (abfd, sec);
8011 }
8012
8013
8014 static void
8015 unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED,
8016 asection *sec,
8017 void *ignore ATTRIBUTE_UNUSED)
8018 {
8019 unrecord_section_with_aarch64_elf_section_data (sec);
8020 }
8021
8022 static bfd_boolean
8023 elfNN_aarch64_close_and_cleanup (bfd *abfd)
8024 {
8025 if (abfd->sections)
8026 bfd_map_over_sections (abfd,
8027 unrecord_section_via_map_over_sections, NULL);
8028
8029 return _bfd_elf_close_and_cleanup (abfd);
8030 }
8031
8032 static bfd_boolean
8033 elfNN_aarch64_bfd_free_cached_info (bfd *abfd)
8034 {
8035 if (abfd->sections)
8036 bfd_map_over_sections (abfd,
8037 unrecord_section_via_map_over_sections, NULL);
8038
8039 return _bfd_free_cached_info (abfd);
8040 }
8041
8042 /* Create dynamic sections. This is different from the ARM backend in that
8043 the got, plt, gotplt and their relocation sections are all created in the
8044 standard part of the bfd elf backend. */
8045
8046 static bfd_boolean
8047 elfNN_aarch64_create_dynamic_sections (bfd *dynobj,
8048 struct bfd_link_info *info)
8049 {
8050 /* We need to create .got section. */
8051 if (!aarch64_elf_create_got_section (dynobj, info))
8052 return FALSE;
8053
8054 return _bfd_elf_create_dynamic_sections (dynobj, info);
8055 }
8056
8057
8058 /* Allocate space in .plt, .got and associated reloc sections for
8059 dynamic relocs. */
8060
8061 static bfd_boolean
8062 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8063 {
8064 struct bfd_link_info *info;
8065 struct elf_aarch64_link_hash_table *htab;
8066 struct elf_aarch64_link_hash_entry *eh;
8067 struct elf_dyn_relocs *p;
8068
8069 /* An example of a bfd_link_hash_indirect symbol is versioned
8070 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8071 -> __gxx_personality_v0(bfd_link_hash_defined)
8072
8073 There is no need to process bfd_link_hash_indirect symbols here
8074 because we will also be presented with the concrete instance of
8075 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8076 called to copy all relevant data from the generic to the concrete
8077 symbol instance. */
8078 if (h->root.type == bfd_link_hash_indirect)
8079 return TRUE;
8080
8081 if (h->root.type == bfd_link_hash_warning)
8082 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8083
8084 info = (struct bfd_link_info *) inf;
8085 htab = elf_aarch64_hash_table (info);
8086
8087 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8088 here if it is defined and referenced in a non-shared object. */
8089 if (h->type == STT_GNU_IFUNC
8090 && h->def_regular)
8091 return TRUE;
8092 else if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
8093 {
8094 /* Make sure this symbol is output as a dynamic symbol.
8095 Undefined weak syms won't yet be marked as dynamic. */
8096 if (h->dynindx == -1 && !h->forced_local
8097 && h->root.type == bfd_link_hash_undefweak)
8098 {
8099 if (!bfd_elf_link_record_dynamic_symbol (info, h))
8100 return FALSE;
8101 }
8102
8103 if (bfd_link_pic (info) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
8104 {
8105 asection *s = htab->root.splt;
8106
8107 /* If this is the first .plt entry, make room for the special
8108 first entry. */
8109 if (s->size == 0)
8110 s->size += htab->plt_header_size;
8111
8112 h->plt.offset = s->size;
8113
8114 /* If this symbol is not defined in a regular file, and we are
8115 not generating a shared library, then set the symbol to this
8116 location in the .plt. This is required to make function
8117 pointers compare as equal between the normal executable and
8118 the shared library. */
8119 if (!bfd_link_pic (info) && !h->def_regular)
8120 {
8121 h->root.u.def.section = s;
8122 h->root.u.def.value = h->plt.offset;
8123 }
8124
8125 /* Make room for this entry. For now we only create the
8126 small model PLT entries. We later need to find a way
8127 of relaxing into these from the large model PLT entries. */
8128 s->size += PLT_SMALL_ENTRY_SIZE;
8129
8130 /* We also need to make an entry in the .got.plt section, which
8131 will be placed in the .got section by the linker script. */
8132 htab->root.sgotplt->size += GOT_ENTRY_SIZE;
8133
8134 /* We also need to make an entry in the .rela.plt section. */
8135 htab->root.srelplt->size += RELOC_SIZE (htab);
8136
8137 /* We need to ensure that all GOT entries that serve the PLT
8138 are consecutive with the special GOT slots [0] [1] and
8139 [2]. Any addtional relocations, such as
8140 R_AARCH64_TLSDESC, must be placed after the PLT related
8141 entries. We abuse the reloc_count such that during
8142 sizing we adjust reloc_count to indicate the number of
8143 PLT related reserved entries. In subsequent phases when
8144 filling in the contents of the reloc entries, PLT related
8145 entries are placed by computing their PLT index (0
8146 .. reloc_count). While other none PLT relocs are placed
8147 at the slot indicated by reloc_count and reloc_count is
8148 updated. */
8149
8150 htab->root.srelplt->reloc_count++;
8151 }
8152 else
8153 {
8154 h->plt.offset = (bfd_vma) - 1;
8155 h->needs_plt = 0;
8156 }
8157 }
8158 else
8159 {
8160 h->plt.offset = (bfd_vma) - 1;
8161 h->needs_plt = 0;
8162 }
8163
8164 eh = (struct elf_aarch64_link_hash_entry *) h;
8165 eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
8166
8167 if (h->got.refcount > 0)
8168 {
8169 bfd_boolean dyn;
8170 unsigned got_type = elf_aarch64_hash_entry (h)->got_type;
8171
8172 h->got.offset = (bfd_vma) - 1;
8173
8174 dyn = htab->root.dynamic_sections_created;
8175
8176 /* Make sure this symbol is output as a dynamic symbol.
8177 Undefined weak syms won't yet be marked as dynamic. */
8178 if (dyn && h->dynindx == -1 && !h->forced_local
8179 && h->root.type == bfd_link_hash_undefweak)
8180 {
8181 if (!bfd_elf_link_record_dynamic_symbol (info, h))
8182 return FALSE;
8183 }
8184
8185 if (got_type == GOT_UNKNOWN)
8186 {
8187 }
8188 else if (got_type == GOT_NORMAL)
8189 {
8190 h->got.offset = htab->root.sgot->size;
8191 htab->root.sgot->size += GOT_ENTRY_SIZE;
8192 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8193 || h->root.type != bfd_link_hash_undefweak)
8194 && (bfd_link_pic (info)
8195 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8196 /* Undefined weak symbol in static PIE resolves to 0 without
8197 any dynamic relocations. */
8198 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8199 {
8200 htab->root.srelgot->size += RELOC_SIZE (htab);
8201 }
8202 }
8203 else
8204 {
8205 int indx;
8206 if (got_type & GOT_TLSDESC_GD)
8207 {
8208 eh->tlsdesc_got_jump_table_offset =
8209 (htab->root.sgotplt->size
8210 - aarch64_compute_jump_table_size (htab));
8211 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
8212 h->got.offset = (bfd_vma) - 2;
8213 }
8214
8215 if (got_type & GOT_TLS_GD)
8216 {
8217 h->got.offset = htab->root.sgot->size;
8218 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
8219 }
8220
8221 if (got_type & GOT_TLS_IE)
8222 {
8223 h->got.offset = htab->root.sgot->size;
8224 htab->root.sgot->size += GOT_ENTRY_SIZE;
8225 }
8226
8227 indx = h && h->dynindx != -1 ? h->dynindx : 0;
8228 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8229 || h->root.type != bfd_link_hash_undefweak)
8230 && (!bfd_link_executable (info)
8231 || indx != 0
8232 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
8233 {
8234 if (got_type & GOT_TLSDESC_GD)
8235 {
8236 htab->root.srelplt->size += RELOC_SIZE (htab);
8237 /* Note reloc_count not incremented here! We have
8238 already adjusted reloc_count for this relocation
8239 type. */
8240
8241 /* TLSDESC PLT is now needed, but not yet determined. */
8242 htab->tlsdesc_plt = (bfd_vma) - 1;
8243 }
8244
8245 if (got_type & GOT_TLS_GD)
8246 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
8247
8248 if (got_type & GOT_TLS_IE)
8249 htab->root.srelgot->size += RELOC_SIZE (htab);
8250 }
8251 }
8252 }
8253 else
8254 {
8255 h->got.offset = (bfd_vma) - 1;
8256 }
8257
8258 if (eh->dyn_relocs == NULL)
8259 return TRUE;
8260
8261 /* In the shared -Bsymbolic case, discard space allocated for
8262 dynamic pc-relative relocs against symbols which turn out to be
8263 defined in regular objects. For the normal shared case, discard
8264 space for pc-relative relocs that have become local due to symbol
8265 visibility changes. */
8266
8267 if (bfd_link_pic (info))
8268 {
8269 /* Relocs that use pc_count are those that appear on a call
8270 insn, or certain REL relocs that can generated via assembly.
8271 We want calls to protected symbols to resolve directly to the
8272 function rather than going via the plt. If people want
8273 function pointer comparisons to work as expected then they
8274 should avoid writing weird assembly. */
8275 if (SYMBOL_CALLS_LOCAL (info, h))
8276 {
8277 struct elf_dyn_relocs **pp;
8278
8279 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
8280 {
8281 p->count -= p->pc_count;
8282 p->pc_count = 0;
8283 if (p->count == 0)
8284 *pp = p->next;
8285 else
8286 pp = &p->next;
8287 }
8288 }
8289
8290 /* Also discard relocs on undefined weak syms with non-default
8291 visibility. */
8292 if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak)
8293 {
8294 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
8295 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8296 eh->dyn_relocs = NULL;
8297
8298 /* Make sure undefined weak symbols are output as a dynamic
8299 symbol in PIEs. */
8300 else if (h->dynindx == -1
8301 && !h->forced_local
8302 && h->root.type == bfd_link_hash_undefweak
8303 && !bfd_elf_link_record_dynamic_symbol (info, h))
8304 return FALSE;
8305 }
8306
8307 }
8308 else if (ELIMINATE_COPY_RELOCS)
8309 {
8310 /* For the non-shared case, discard space for relocs against
8311 symbols which turn out to need copy relocs or are not
8312 dynamic. */
8313
8314 if (!h->non_got_ref
8315 && ((h->def_dynamic
8316 && !h->def_regular)
8317 || (htab->root.dynamic_sections_created
8318 && (h->root.type == bfd_link_hash_undefweak
8319 || h->root.type == bfd_link_hash_undefined))))
8320 {
8321 /* Make sure this symbol is output as a dynamic symbol.
8322 Undefined weak syms won't yet be marked as dynamic. */
8323 if (h->dynindx == -1
8324 && !h->forced_local
8325 && h->root.type == bfd_link_hash_undefweak
8326 && !bfd_elf_link_record_dynamic_symbol (info, h))
8327 return FALSE;
8328
8329 /* If that succeeded, we know we'll be keeping all the
8330 relocs. */
8331 if (h->dynindx != -1)
8332 goto keep;
8333 }
8334
8335 eh->dyn_relocs = NULL;
8336
8337 keep:;
8338 }
8339
8340 /* Finally, allocate space. */
8341 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8342 {
8343 asection *sreloc;
8344
8345 sreloc = elf_section_data (p->sec)->sreloc;
8346
8347 BFD_ASSERT (sreloc != NULL);
8348
8349 sreloc->size += p->count * RELOC_SIZE (htab);
8350 }
8351
8352 return TRUE;
8353 }
8354
8355 /* Allocate space in .plt, .got and associated reloc sections for
8356 ifunc dynamic relocs. */
8357
8358 static bfd_boolean
8359 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h,
8360 void *inf)
8361 {
8362 struct bfd_link_info *info;
8363 struct elf_aarch64_link_hash_table *htab;
8364 struct elf_aarch64_link_hash_entry *eh;
8365
8366 /* An example of a bfd_link_hash_indirect symbol is versioned
8367 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8368 -> __gxx_personality_v0(bfd_link_hash_defined)
8369
8370 There is no need to process bfd_link_hash_indirect symbols here
8371 because we will also be presented with the concrete instance of
8372 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8373 called to copy all relevant data from the generic to the concrete
8374 symbol instance. */
8375 if (h->root.type == bfd_link_hash_indirect)
8376 return TRUE;
8377
8378 if (h->root.type == bfd_link_hash_warning)
8379 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8380
8381 info = (struct bfd_link_info *) inf;
8382 htab = elf_aarch64_hash_table (info);
8383
8384 eh = (struct elf_aarch64_link_hash_entry *) h;
8385
8386 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8387 here if it is defined and referenced in a non-shared object. */
8388 if (h->type == STT_GNU_IFUNC
8389 && h->def_regular)
8390 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
8391 &eh->dyn_relocs,
8392 NULL,
8393 htab->plt_entry_size,
8394 htab->plt_header_size,
8395 GOT_ENTRY_SIZE,
8396 FALSE);
8397 return TRUE;
8398 }
8399
8400 /* Allocate space in .plt, .got and associated reloc sections for
8401 local dynamic relocs. */
8402
8403 static bfd_boolean
8404 elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf)
8405 {
8406 struct elf_link_hash_entry *h
8407 = (struct elf_link_hash_entry *) *slot;
8408
8409 if (h->type != STT_GNU_IFUNC
8410 || !h->def_regular
8411 || !h->ref_regular
8412 || !h->forced_local
8413 || h->root.type != bfd_link_hash_defined)
8414 abort ();
8415
8416 return elfNN_aarch64_allocate_dynrelocs (h, inf);
8417 }
8418
8419 /* Allocate space in .plt, .got and associated reloc sections for
8420 local ifunc dynamic relocs. */
8421
8422 static bfd_boolean
8423 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf)
8424 {
8425 struct elf_link_hash_entry *h
8426 = (struct elf_link_hash_entry *) *slot;
8427
8428 if (h->type != STT_GNU_IFUNC
8429 || !h->def_regular
8430 || !h->ref_regular
8431 || !h->forced_local
8432 || h->root.type != bfd_link_hash_defined)
8433 abort ();
8434
8435 return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf);
8436 }
8437
8438 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
8439 read-only sections. */
8440
8441 static bfd_boolean
8442 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
8443 {
8444 asection *sec;
8445
8446 if (h->root.type == bfd_link_hash_indirect)
8447 return TRUE;
8448
8449 sec = readonly_dynrelocs (h);
8450 if (sec != NULL)
8451 {
8452 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
8453
8454 info->flags |= DF_TEXTREL;
8455 info->callbacks->minfo
8456 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
8457 sec->owner, h->root.root.string, sec);
8458
8459 /* Not an error, just cut short the traversal. */
8460 return FALSE;
8461 }
8462 return TRUE;
8463 }
8464
8465 /* This is the most important function of all . Innocuosly named
8466 though ! */
8467
8468 static bfd_boolean
8469 elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8470 struct bfd_link_info *info)
8471 {
8472 struct elf_aarch64_link_hash_table *htab;
8473 bfd *dynobj;
8474 asection *s;
8475 bfd_boolean relocs;
8476 bfd *ibfd;
8477
8478 htab = elf_aarch64_hash_table ((info));
8479 dynobj = htab->root.dynobj;
8480
8481 BFD_ASSERT (dynobj != NULL);
8482
8483 if (htab->root.dynamic_sections_created)
8484 {
8485 if (bfd_link_executable (info) && !info->nointerp)
8486 {
8487 s = bfd_get_linker_section (dynobj, ".interp");
8488 if (s == NULL)
8489 abort ();
8490 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8491 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8492 }
8493 }
8494
8495 /* Set up .got offsets for local syms, and space for local dynamic
8496 relocs. */
8497 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8498 {
8499 struct elf_aarch64_local_symbol *locals = NULL;
8500 Elf_Internal_Shdr *symtab_hdr;
8501 asection *srel;
8502 unsigned int i;
8503
8504 if (!is_aarch64_elf (ibfd))
8505 continue;
8506
8507 for (s = ibfd->sections; s != NULL; s = s->next)
8508 {
8509 struct elf_dyn_relocs *p;
8510
8511 for (p = (struct elf_dyn_relocs *)
8512 (elf_section_data (s)->local_dynrel); p != NULL; p = p->next)
8513 {
8514 if (!bfd_is_abs_section (p->sec)
8515 && bfd_is_abs_section (p->sec->output_section))
8516 {
8517 /* Input section has been discarded, either because
8518 it is a copy of a linkonce section or due to
8519 linker script /DISCARD/, so we'll be discarding
8520 the relocs too. */
8521 }
8522 else if (p->count != 0)
8523 {
8524 srel = elf_section_data (p->sec)->sreloc;
8525 srel->size += p->count * RELOC_SIZE (htab);
8526 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8527 info->flags |= DF_TEXTREL;
8528 }
8529 }
8530 }
8531
8532 locals = elf_aarch64_locals (ibfd);
8533 if (!locals)
8534 continue;
8535
8536 symtab_hdr = &elf_symtab_hdr (ibfd);
8537 srel = htab->root.srelgot;
8538 for (i = 0; i < symtab_hdr->sh_info; i++)
8539 {
8540 locals[i].got_offset = (bfd_vma) - 1;
8541 locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
8542 if (locals[i].got_refcount > 0)
8543 {
8544 unsigned got_type = locals[i].got_type;
8545 if (got_type & GOT_TLSDESC_GD)
8546 {
8547 locals[i].tlsdesc_got_jump_table_offset =
8548 (htab->root.sgotplt->size
8549 - aarch64_compute_jump_table_size (htab));
8550 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
8551 locals[i].got_offset = (bfd_vma) - 2;
8552 }
8553
8554 if (got_type & GOT_TLS_GD)
8555 {
8556 locals[i].got_offset = htab->root.sgot->size;
8557 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
8558 }
8559
8560 if (got_type & GOT_TLS_IE
8561 || got_type & GOT_NORMAL)
8562 {
8563 locals[i].got_offset = htab->root.sgot->size;
8564 htab->root.sgot->size += GOT_ENTRY_SIZE;
8565 }
8566
8567 if (got_type == GOT_UNKNOWN)
8568 {
8569 }
8570
8571 if (bfd_link_pic (info))
8572 {
8573 if (got_type & GOT_TLSDESC_GD)
8574 {
8575 htab->root.srelplt->size += RELOC_SIZE (htab);
8576 /* Note RELOC_COUNT not incremented here! */
8577 htab->tlsdesc_plt = (bfd_vma) - 1;
8578 }
8579
8580 if (got_type & GOT_TLS_GD)
8581 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
8582
8583 if (got_type & GOT_TLS_IE
8584 || got_type & GOT_NORMAL)
8585 htab->root.srelgot->size += RELOC_SIZE (htab);
8586 }
8587 }
8588 else
8589 {
8590 locals[i].got_refcount = (bfd_vma) - 1;
8591 }
8592 }
8593 }
8594
8595
8596 /* Allocate global sym .plt and .got entries, and space for global
8597 sym dynamic relocs. */
8598 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs,
8599 info);
8600
8601 /* Allocate global ifunc sym .plt and .got entries, and space for global
8602 ifunc sym dynamic relocs. */
8603 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs,
8604 info);
8605
8606 /* Allocate .plt and .got entries, and space for local symbols. */
8607 htab_traverse (htab->loc_hash_table,
8608 elfNN_aarch64_allocate_local_dynrelocs,
8609 info);
8610
8611 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
8612 htab_traverse (htab->loc_hash_table,
8613 elfNN_aarch64_allocate_local_ifunc_dynrelocs,
8614 info);
8615
8616 /* For every jump slot reserved in the sgotplt, reloc_count is
8617 incremented. However, when we reserve space for TLS descriptors,
8618 it's not incremented, so in order to compute the space reserved
8619 for them, it suffices to multiply the reloc count by the jump
8620 slot size. */
8621
8622 if (htab->root.srelplt)
8623 htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
8624
8625 if (htab->tlsdesc_plt)
8626 {
8627 if (htab->root.splt->size == 0)
8628 htab->root.splt->size += PLT_ENTRY_SIZE;
8629
8630 htab->tlsdesc_plt = htab->root.splt->size;
8631 htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE;
8632
8633 /* If we're not using lazy TLS relocations, don't generate the
8634 GOT entry required. */
8635 if (!(info->flags & DF_BIND_NOW))
8636 {
8637 htab->dt_tlsdesc_got = htab->root.sgot->size;
8638 htab->root.sgot->size += GOT_ENTRY_SIZE;
8639 }
8640 }
8641
8642 /* Init mapping symbols information to use later to distingush between
8643 code and data while scanning for errata. */
8644 if (htab->fix_erratum_835769 || htab->fix_erratum_843419)
8645 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8646 {
8647 if (!is_aarch64_elf (ibfd))
8648 continue;
8649 bfd_elfNN_aarch64_init_maps (ibfd);
8650 }
8651
8652 /* We now have determined the sizes of the various dynamic sections.
8653 Allocate memory for them. */
8654 relocs = FALSE;
8655 for (s = dynobj->sections; s != NULL; s = s->next)
8656 {
8657 if ((s->flags & SEC_LINKER_CREATED) == 0)
8658 continue;
8659
8660 if (s == htab->root.splt
8661 || s == htab->root.sgot
8662 || s == htab->root.sgotplt
8663 || s == htab->root.iplt
8664 || s == htab->root.igotplt
8665 || s == htab->root.sdynbss
8666 || s == htab->root.sdynrelro)
8667 {
8668 /* Strip this section if we don't need it; see the
8669 comment below. */
8670 }
8671 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8672 {
8673 if (s->size != 0 && s != htab->root.srelplt)
8674 relocs = TRUE;
8675
8676 /* We use the reloc_count field as a counter if we need
8677 to copy relocs into the output file. */
8678 if (s != htab->root.srelplt)
8679 s->reloc_count = 0;
8680 }
8681 else
8682 {
8683 /* It's not one of our sections, so don't allocate space. */
8684 continue;
8685 }
8686
8687 if (s->size == 0)
8688 {
8689 /* If we don't need this section, strip it from the
8690 output file. This is mostly to handle .rela.bss and
8691 .rela.plt. We must create both sections in
8692 create_dynamic_sections, because they must be created
8693 before the linker maps input sections to output
8694 sections. The linker does that before
8695 adjust_dynamic_symbol is called, and it is that
8696 function which decides whether anything needs to go
8697 into these sections. */
8698 s->flags |= SEC_EXCLUDE;
8699 continue;
8700 }
8701
8702 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8703 continue;
8704
8705 /* Allocate memory for the section contents. We use bfd_zalloc
8706 here in case unused entries are not reclaimed before the
8707 section's contents are written out. This should not happen,
8708 but this way if it does, we get a R_AARCH64_NONE reloc instead
8709 of garbage. */
8710 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
8711 if (s->contents == NULL)
8712 return FALSE;
8713 }
8714
8715 if (htab->root.dynamic_sections_created)
8716 {
8717 /* Add some entries to the .dynamic section. We fill in the
8718 values later, in elfNN_aarch64_finish_dynamic_sections, but we
8719 must add the entries now so that we get the correct size for
8720 the .dynamic section. The DT_DEBUG entry is filled in by the
8721 dynamic linker and used by the debugger. */
8722 #define add_dynamic_entry(TAG, VAL) \
8723 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8724
8725 if (bfd_link_executable (info))
8726 {
8727 if (!add_dynamic_entry (DT_DEBUG, 0))
8728 return FALSE;
8729 }
8730
8731 if (htab->root.splt->size != 0)
8732 {
8733 if (!add_dynamic_entry (DT_PLTGOT, 0)
8734 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8735 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8736 || !add_dynamic_entry (DT_JMPREL, 0))
8737 return FALSE;
8738
8739 if (htab->tlsdesc_plt
8740 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
8741 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
8742 return FALSE;
8743 }
8744
8745 if (relocs)
8746 {
8747 if (!add_dynamic_entry (DT_RELA, 0)
8748 || !add_dynamic_entry (DT_RELASZ, 0)
8749 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
8750 return FALSE;
8751
8752 /* If any dynamic relocs apply to a read-only section,
8753 then we need a DT_TEXTREL entry. */
8754 if ((info->flags & DF_TEXTREL) == 0)
8755 elf_link_hash_traverse (&htab->root, maybe_set_textrel, info);
8756
8757 if ((info->flags & DF_TEXTREL) != 0)
8758 {
8759 if (!add_dynamic_entry (DT_TEXTREL, 0))
8760 return FALSE;
8761 }
8762 }
8763 }
8764 #undef add_dynamic_entry
8765
8766 return TRUE;
8767 }
8768
8769 static inline void
8770 elf_aarch64_update_plt_entry (bfd *output_bfd,
8771 bfd_reloc_code_real_type r_type,
8772 bfd_byte *plt_entry, bfd_vma value)
8773 {
8774 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type);
8775
8776 /* FIXME: We should check the return value from this function call. */
8777 (void) _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value);
8778 }
8779
8780 static void
8781 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
8782 struct elf_aarch64_link_hash_table
8783 *htab, bfd *output_bfd,
8784 struct bfd_link_info *info)
8785 {
8786 bfd_byte *plt_entry;
8787 bfd_vma plt_index;
8788 bfd_vma got_offset;
8789 bfd_vma gotplt_entry_address;
8790 bfd_vma plt_entry_address;
8791 Elf_Internal_Rela rela;
8792 bfd_byte *loc;
8793 asection *plt, *gotplt, *relplt;
8794
8795 /* When building a static executable, use .iplt, .igot.plt and
8796 .rela.iplt sections for STT_GNU_IFUNC symbols. */
8797 if (htab->root.splt != NULL)
8798 {
8799 plt = htab->root.splt;
8800 gotplt = htab->root.sgotplt;
8801 relplt = htab->root.srelplt;
8802 }
8803 else
8804 {
8805 plt = htab->root.iplt;
8806 gotplt = htab->root.igotplt;
8807 relplt = htab->root.irelplt;
8808 }
8809
8810 /* Get the index in the procedure linkage table which
8811 corresponds to this symbol. This is the index of this symbol
8812 in all the symbols for which we are making plt entries. The
8813 first entry in the procedure linkage table is reserved.
8814
8815 Get the offset into the .got table of the entry that
8816 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
8817 bytes. The first three are reserved for the dynamic linker.
8818
8819 For static executables, we don't reserve anything. */
8820
8821 if (plt == htab->root.splt)
8822 {
8823 plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
8824 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
8825 }
8826 else
8827 {
8828 plt_index = h->plt.offset / htab->plt_entry_size;
8829 got_offset = plt_index * GOT_ENTRY_SIZE;
8830 }
8831
8832 plt_entry = plt->contents + h->plt.offset;
8833 plt_entry_address = plt->output_section->vma
8834 + plt->output_offset + h->plt.offset;
8835 gotplt_entry_address = gotplt->output_section->vma +
8836 gotplt->output_offset + got_offset;
8837
8838 /* Copy in the boiler-plate for the PLTn entry. */
8839 memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE);
8840
8841 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
8842 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
8843 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8844 plt_entry,
8845 PG (gotplt_entry_address) -
8846 PG (plt_entry_address));
8847
8848 /* Fill in the lo12 bits for the load from the pltgot. */
8849 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
8850 plt_entry + 4,
8851 PG_OFFSET (gotplt_entry_address));
8852
8853 /* Fill in the lo12 bits for the add from the pltgot entry. */
8854 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
8855 plt_entry + 8,
8856 PG_OFFSET (gotplt_entry_address));
8857
8858 /* All the GOTPLT Entries are essentially initialized to PLT0. */
8859 bfd_put_NN (output_bfd,
8860 plt->output_section->vma + plt->output_offset,
8861 gotplt->contents + got_offset);
8862
8863 rela.r_offset = gotplt_entry_address;
8864
8865 if (h->dynindx == -1
8866 || ((bfd_link_executable (info)
8867 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8868 && h->def_regular
8869 && h->type == STT_GNU_IFUNC))
8870 {
8871 /* If an STT_GNU_IFUNC symbol is locally defined, generate
8872 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
8873 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
8874 rela.r_addend = (h->root.u.def.value
8875 + h->root.u.def.section->output_section->vma
8876 + h->root.u.def.section->output_offset);
8877 }
8878 else
8879 {
8880 /* Fill in the entry in the .rela.plt section. */
8881 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT));
8882 rela.r_addend = 0;
8883 }
8884
8885 /* Compute the relocation entry to used based on PLT index and do
8886 not adjust reloc_count. The reloc_count has already been adjusted
8887 to account for this entry. */
8888 loc = relplt->contents + plt_index * RELOC_SIZE (htab);
8889 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
8890 }
8891
8892 /* Size sections even though they're not dynamic. We use it to setup
8893 _TLS_MODULE_BASE_, if needed. */
8894
8895 static bfd_boolean
8896 elfNN_aarch64_always_size_sections (bfd *output_bfd,
8897 struct bfd_link_info *info)
8898 {
8899 asection *tls_sec;
8900
8901 if (bfd_link_relocatable (info))
8902 return TRUE;
8903
8904 tls_sec = elf_hash_table (info)->tls_sec;
8905
8906 if (tls_sec)
8907 {
8908 struct elf_link_hash_entry *tlsbase;
8909
8910 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
8911 "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
8912
8913 if (tlsbase)
8914 {
8915 struct bfd_link_hash_entry *h = NULL;
8916 const struct elf_backend_data *bed =
8917 get_elf_backend_data (output_bfd);
8918
8919 if (!(_bfd_generic_link_add_one_symbol
8920 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
8921 tls_sec, 0, NULL, FALSE, bed->collect, &h)))
8922 return FALSE;
8923
8924 tlsbase->type = STT_TLS;
8925 tlsbase = (struct elf_link_hash_entry *) h;
8926 tlsbase->def_regular = 1;
8927 tlsbase->other = STV_HIDDEN;
8928 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
8929 }
8930 }
8931
8932 return TRUE;
8933 }
8934
8935 /* Finish up dynamic symbol handling. We set the contents of various
8936 dynamic sections here. */
8937
8938 static bfd_boolean
8939 elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd,
8940 struct bfd_link_info *info,
8941 struct elf_link_hash_entry *h,
8942 Elf_Internal_Sym *sym)
8943 {
8944 struct elf_aarch64_link_hash_table *htab;
8945 htab = elf_aarch64_hash_table (info);
8946
8947 if (h->plt.offset != (bfd_vma) - 1)
8948 {
8949 asection *plt, *gotplt, *relplt;
8950
8951 /* This symbol has an entry in the procedure linkage table. Set
8952 it up. */
8953
8954 /* When building a static executable, use .iplt, .igot.plt and
8955 .rela.iplt sections for STT_GNU_IFUNC symbols. */
8956 if (htab->root.splt != NULL)
8957 {
8958 plt = htab->root.splt;
8959 gotplt = htab->root.sgotplt;
8960 relplt = htab->root.srelplt;
8961 }
8962 else
8963 {
8964 plt = htab->root.iplt;
8965 gotplt = htab->root.igotplt;
8966 relplt = htab->root.irelplt;
8967 }
8968
8969 /* This symbol has an entry in the procedure linkage table. Set
8970 it up. */
8971 if ((h->dynindx == -1
8972 && !((h->forced_local || bfd_link_executable (info))
8973 && h->def_regular
8974 && h->type == STT_GNU_IFUNC))
8975 || plt == NULL
8976 || gotplt == NULL
8977 || relplt == NULL)
8978 return FALSE;
8979
8980 elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info);
8981 if (!h->def_regular)
8982 {
8983 /* Mark the symbol as undefined, rather than as defined in
8984 the .plt section. */
8985 sym->st_shndx = SHN_UNDEF;
8986 /* If the symbol is weak we need to clear the value.
8987 Otherwise, the PLT entry would provide a definition for
8988 the symbol even if the symbol wasn't defined anywhere,
8989 and so the symbol would never be NULL. Leave the value if
8990 there were any relocations where pointer equality matters
8991 (this is a clue for the dynamic linker, to make function
8992 pointer comparisons work between an application and shared
8993 library). */
8994 if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
8995 sym->st_value = 0;
8996 }
8997 }
8998
8999 if (h->got.offset != (bfd_vma) - 1
9000 && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL
9001 /* Undefined weak symbol in static PIE resolves to 0 without
9002 any dynamic relocations. */
9003 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9004 {
9005 Elf_Internal_Rela rela;
9006 bfd_byte *loc;
9007
9008 /* This symbol has an entry in the global offset table. Set it
9009 up. */
9010 if (htab->root.sgot == NULL || htab->root.srelgot == NULL)
9011 abort ();
9012
9013 rela.r_offset = (htab->root.sgot->output_section->vma
9014 + htab->root.sgot->output_offset
9015 + (h->got.offset & ~(bfd_vma) 1));
9016
9017 if (h->def_regular
9018 && h->type == STT_GNU_IFUNC)
9019 {
9020 if (bfd_link_pic (info))
9021 {
9022 /* Generate R_AARCH64_GLOB_DAT. */
9023 goto do_glob_dat;
9024 }
9025 else
9026 {
9027 asection *plt;
9028
9029 if (!h->pointer_equality_needed)
9030 abort ();
9031
9032 /* For non-shared object, we can't use .got.plt, which
9033 contains the real function address if we need pointer
9034 equality. We load the GOT entry with the PLT entry. */
9035 plt = htab->root.splt ? htab->root.splt : htab->root.iplt;
9036 bfd_put_NN (output_bfd, (plt->output_section->vma
9037 + plt->output_offset
9038 + h->plt.offset),
9039 htab->root.sgot->contents
9040 + (h->got.offset & ~(bfd_vma) 1));
9041 return TRUE;
9042 }
9043 }
9044 else if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h))
9045 {
9046 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
9047 return FALSE;
9048
9049 BFD_ASSERT ((h->got.offset & 1) != 0);
9050 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
9051 rela.r_addend = (h->root.u.def.value
9052 + h->root.u.def.section->output_section->vma
9053 + h->root.u.def.section->output_offset);
9054 }
9055 else
9056 {
9057 do_glob_dat:
9058 BFD_ASSERT ((h->got.offset & 1) == 0);
9059 bfd_put_NN (output_bfd, (bfd_vma) 0,
9060 htab->root.sgot->contents + h->got.offset);
9061 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT));
9062 rela.r_addend = 0;
9063 }
9064
9065 loc = htab->root.srelgot->contents;
9066 loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab);
9067 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
9068 }
9069
9070 if (h->needs_copy)
9071 {
9072 Elf_Internal_Rela rela;
9073 asection *s;
9074 bfd_byte *loc;
9075
9076 /* This symbol needs a copy reloc. Set it up. */
9077 if (h->dynindx == -1
9078 || (h->root.type != bfd_link_hash_defined
9079 && h->root.type != bfd_link_hash_defweak)
9080 || htab->root.srelbss == NULL)
9081 abort ();
9082
9083 rela.r_offset = (h->root.u.def.value
9084 + h->root.u.def.section->output_section->vma
9085 + h->root.u.def.section->output_offset);
9086 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY));
9087 rela.r_addend = 0;
9088 if (h->root.u.def.section == htab->root.sdynrelro)
9089 s = htab->root.sreldynrelro;
9090 else
9091 s = htab->root.srelbss;
9092 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
9093 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
9094 }
9095
9096 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
9097 be NULL for local symbols. */
9098 if (sym != NULL
9099 && (h == elf_hash_table (info)->hdynamic
9100 || h == elf_hash_table (info)->hgot))
9101 sym->st_shndx = SHN_ABS;
9102
9103 return TRUE;
9104 }
9105
9106 /* Finish up local dynamic symbol handling. We set the contents of
9107 various dynamic sections here. */
9108
9109 static bfd_boolean
9110 elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf)
9111 {
9112 struct elf_link_hash_entry *h
9113 = (struct elf_link_hash_entry *) *slot;
9114 struct bfd_link_info *info
9115 = (struct bfd_link_info *) inf;
9116
9117 return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd,
9118 info, h, NULL);
9119 }
9120
9121 static void
9122 elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED,
9123 struct elf_aarch64_link_hash_table
9124 *htab)
9125 {
9126 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
9127 small and large plts and at the minute just generates
9128 the small PLT. */
9129
9130 /* PLT0 of the small PLT looks like this in ELF64 -
9131 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
9132 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
9133 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
9134 // symbol resolver
9135 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
9136 // GOTPLT entry for this.
9137 br x17
9138 PLT0 will be slightly different in ELF32 due to different got entry
9139 size. */
9140 bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */
9141 bfd_vma plt_base;
9142
9143
9144 memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry,
9145 PLT_ENTRY_SIZE);
9146 elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize =
9147 PLT_ENTRY_SIZE;
9148
9149 plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma
9150 + htab->root.sgotplt->output_offset
9151 + GOT_ENTRY_SIZE * 2);
9152
9153 plt_base = htab->root.splt->output_section->vma +
9154 htab->root.splt->output_offset;
9155
9156 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
9157 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
9158 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
9159 htab->root.splt->contents + 4,
9160 PG (plt_got_2nd_ent) - PG (plt_base + 4));
9161
9162 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
9163 htab->root.splt->contents + 8,
9164 PG_OFFSET (plt_got_2nd_ent));
9165
9166 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
9167 htab->root.splt->contents + 12,
9168 PG_OFFSET (plt_got_2nd_ent));
9169 }
9170
9171 static bfd_boolean
9172 elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd,
9173 struct bfd_link_info *info)
9174 {
9175 struct elf_aarch64_link_hash_table *htab;
9176 bfd *dynobj;
9177 asection *sdyn;
9178
9179 htab = elf_aarch64_hash_table (info);
9180 dynobj = htab->root.dynobj;
9181 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9182
9183 if (htab->root.dynamic_sections_created)
9184 {
9185 ElfNN_External_Dyn *dyncon, *dynconend;
9186
9187 if (sdyn == NULL || htab->root.sgot == NULL)
9188 abort ();
9189
9190 dyncon = (ElfNN_External_Dyn *) sdyn->contents;
9191 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
9192 for (; dyncon < dynconend; dyncon++)
9193 {
9194 Elf_Internal_Dyn dyn;
9195 asection *s;
9196
9197 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
9198
9199 switch (dyn.d_tag)
9200 {
9201 default:
9202 continue;
9203
9204 case DT_PLTGOT:
9205 s = htab->root.sgotplt;
9206 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9207 break;
9208
9209 case DT_JMPREL:
9210 s = htab->root.srelplt;
9211 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9212 break;
9213
9214 case DT_PLTRELSZ:
9215 s = htab->root.srelplt;
9216 dyn.d_un.d_val = s->size;
9217 break;
9218
9219 case DT_TLSDESC_PLT:
9220 s = htab->root.splt;
9221 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
9222 + htab->tlsdesc_plt;
9223 break;
9224
9225 case DT_TLSDESC_GOT:
9226 s = htab->root.sgot;
9227 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
9228 + htab->dt_tlsdesc_got;
9229 break;
9230 }
9231
9232 bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon);
9233 }
9234
9235 }
9236
9237 /* Fill in the special first entry in the procedure linkage table. */
9238 if (htab->root.splt && htab->root.splt->size > 0)
9239 {
9240 elfNN_aarch64_init_small_plt0_entry (output_bfd, htab);
9241
9242 elf_section_data (htab->root.splt->output_section)->
9243 this_hdr.sh_entsize = htab->plt_entry_size;
9244
9245
9246 if (htab->tlsdesc_plt)
9247 {
9248 bfd_put_NN (output_bfd, (bfd_vma) 0,
9249 htab->root.sgot->contents + htab->dt_tlsdesc_got);
9250
9251 memcpy (htab->root.splt->contents + htab->tlsdesc_plt,
9252 elfNN_aarch64_tlsdesc_small_plt_entry,
9253 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry));
9254
9255 {
9256 bfd_vma adrp1_addr =
9257 htab->root.splt->output_section->vma
9258 + htab->root.splt->output_offset + htab->tlsdesc_plt + 4;
9259
9260 bfd_vma adrp2_addr = adrp1_addr + 4;
9261
9262 bfd_vma got_addr =
9263 htab->root.sgot->output_section->vma
9264 + htab->root.sgot->output_offset;
9265
9266 bfd_vma pltgot_addr =
9267 htab->root.sgotplt->output_section->vma
9268 + htab->root.sgotplt->output_offset;
9269
9270 bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got;
9271
9272 bfd_byte *plt_entry =
9273 htab->root.splt->contents + htab->tlsdesc_plt;
9274
9275 /* adrp x2, DT_TLSDESC_GOT */
9276 elf_aarch64_update_plt_entry (output_bfd,
9277 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
9278 plt_entry + 4,
9279 (PG (dt_tlsdesc_got)
9280 - PG (adrp1_addr)));
9281
9282 /* adrp x3, 0 */
9283 elf_aarch64_update_plt_entry (output_bfd,
9284 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
9285 plt_entry + 8,
9286 (PG (pltgot_addr)
9287 - PG (adrp2_addr)));
9288
9289 /* ldr x2, [x2, #0] */
9290 elf_aarch64_update_plt_entry (output_bfd,
9291 BFD_RELOC_AARCH64_LDSTNN_LO12,
9292 plt_entry + 12,
9293 PG_OFFSET (dt_tlsdesc_got));
9294
9295 /* add x3, x3, 0 */
9296 elf_aarch64_update_plt_entry (output_bfd,
9297 BFD_RELOC_AARCH64_ADD_LO12,
9298 plt_entry + 16,
9299 PG_OFFSET (pltgot_addr));
9300 }
9301 }
9302 }
9303
9304 if (htab->root.sgotplt)
9305 {
9306 if (bfd_is_abs_section (htab->root.sgotplt->output_section))
9307 {
9308 _bfd_error_handler
9309 (_("discarded output section: `%pA'"), htab->root.sgotplt);
9310 return FALSE;
9311 }
9312
9313 /* Fill in the first three entries in the global offset table. */
9314 if (htab->root.sgotplt->size > 0)
9315 {
9316 bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents);
9317
9318 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
9319 bfd_put_NN (output_bfd,
9320 (bfd_vma) 0,
9321 htab->root.sgotplt->contents + GOT_ENTRY_SIZE);
9322 bfd_put_NN (output_bfd,
9323 (bfd_vma) 0,
9324 htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2);
9325 }
9326
9327 if (htab->root.sgot)
9328 {
9329 if (htab->root.sgot->size > 0)
9330 {
9331 bfd_vma addr =
9332 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0;
9333 bfd_put_NN (output_bfd, addr, htab->root.sgot->contents);
9334 }
9335 }
9336
9337 elf_section_data (htab->root.sgotplt->output_section)->
9338 this_hdr.sh_entsize = GOT_ENTRY_SIZE;
9339 }
9340
9341 if (htab->root.sgot && htab->root.sgot->size > 0)
9342 elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize
9343 = GOT_ENTRY_SIZE;
9344
9345 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
9346 htab_traverse (htab->loc_hash_table,
9347 elfNN_aarch64_finish_local_dynamic_symbol,
9348 info);
9349
9350 return TRUE;
9351 }
9352
9353 /* Return address for Ith PLT stub in section PLT, for relocation REL
9354 or (bfd_vma) -1 if it should not be included. */
9355
9356 static bfd_vma
9357 elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt,
9358 const arelent *rel ATTRIBUTE_UNUSED)
9359 {
9360 return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE;
9361 }
9362
9363 /* Returns TRUE if NAME is an AArch64 mapping symbol.
9364 The ARM ELF standard defines $x (for A64 code) and $d (for data).
9365 It also allows a period initiated suffix to be added to the symbol, ie:
9366 "$[adtx]\.[:sym_char]+". */
9367
9368 static bfd_boolean
9369 is_aarch64_mapping_symbol (const char * name)
9370 {
9371 return name != NULL /* Paranoia. */
9372 && name[0] == '$' /* Note: if objcopy --prefix-symbols has been used then
9373 the mapping symbols could have acquired a prefix.
9374 We do not support this here, since such symbols no
9375 longer conform to the ARM ELF ABI. */
9376 && (name[1] == 'd' || name[1] == 'x')
9377 && (name[2] == 0 || name[2] == '.');
9378 /* FIXME: Strictly speaking the symbol is only a valid mapping symbol if
9379 any characters that follow the period are legal characters for the body
9380 of a symbol's name. For now we just assume that this is the case. */
9381 }
9382
9383 /* Make sure that mapping symbols in object files are not removed via the
9384 "strip --strip-unneeded" tool. These symbols might needed in order to
9385 correctly generate linked files. Once an object file has been linked,
9386 it should be safe to remove them. */
9387
9388 static void
9389 elfNN_aarch64_backend_symbol_processing (bfd *abfd, asymbol *sym)
9390 {
9391 if (((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
9392 && sym->section != bfd_abs_section_ptr
9393 && is_aarch64_mapping_symbol (sym->name))
9394 sym->flags |= BSF_KEEP;
9395 }
9396
9397
9398 /* We use this so we can override certain functions
9399 (though currently we don't). */
9400
9401 const struct elf_size_info elfNN_aarch64_size_info =
9402 {
9403 sizeof (ElfNN_External_Ehdr),
9404 sizeof (ElfNN_External_Phdr),
9405 sizeof (ElfNN_External_Shdr),
9406 sizeof (ElfNN_External_Rel),
9407 sizeof (ElfNN_External_Rela),
9408 sizeof (ElfNN_External_Sym),
9409 sizeof (ElfNN_External_Dyn),
9410 sizeof (Elf_External_Note),
9411 4, /* Hash table entry size. */
9412 1, /* Internal relocs per external relocs. */
9413 ARCH_SIZE, /* Arch size. */
9414 LOG_FILE_ALIGN, /* Log_file_align. */
9415 ELFCLASSNN, EV_CURRENT,
9416 bfd_elfNN_write_out_phdrs,
9417 bfd_elfNN_write_shdrs_and_ehdr,
9418 bfd_elfNN_checksum_contents,
9419 bfd_elfNN_write_relocs,
9420 bfd_elfNN_swap_symbol_in,
9421 bfd_elfNN_swap_symbol_out,
9422 bfd_elfNN_slurp_reloc_table,
9423 bfd_elfNN_slurp_symbol_table,
9424 bfd_elfNN_swap_dyn_in,
9425 bfd_elfNN_swap_dyn_out,
9426 bfd_elfNN_swap_reloc_in,
9427 bfd_elfNN_swap_reloc_out,
9428 bfd_elfNN_swap_reloca_in,
9429 bfd_elfNN_swap_reloca_out
9430 };
9431
9432 #define ELF_ARCH bfd_arch_aarch64
9433 #define ELF_MACHINE_CODE EM_AARCH64
9434 #define ELF_MAXPAGESIZE 0x10000
9435 #define ELF_MINPAGESIZE 0x1000
9436 #define ELF_COMMONPAGESIZE 0x1000
9437
9438 #define bfd_elfNN_close_and_cleanup \
9439 elfNN_aarch64_close_and_cleanup
9440
9441 #define bfd_elfNN_bfd_free_cached_info \
9442 elfNN_aarch64_bfd_free_cached_info
9443
9444 #define bfd_elfNN_bfd_is_target_special_symbol \
9445 elfNN_aarch64_is_target_special_symbol
9446
9447 #define bfd_elfNN_bfd_link_hash_table_create \
9448 elfNN_aarch64_link_hash_table_create
9449
9450 #define bfd_elfNN_bfd_merge_private_bfd_data \
9451 elfNN_aarch64_merge_private_bfd_data
9452
9453 #define bfd_elfNN_bfd_print_private_bfd_data \
9454 elfNN_aarch64_print_private_bfd_data
9455
9456 #define bfd_elfNN_bfd_reloc_type_lookup \
9457 elfNN_aarch64_reloc_type_lookup
9458
9459 #define bfd_elfNN_bfd_reloc_name_lookup \
9460 elfNN_aarch64_reloc_name_lookup
9461
9462 #define bfd_elfNN_bfd_set_private_flags \
9463 elfNN_aarch64_set_private_flags
9464
9465 #define bfd_elfNN_find_inliner_info \
9466 elfNN_aarch64_find_inliner_info
9467
9468 #define bfd_elfNN_find_nearest_line \
9469 elfNN_aarch64_find_nearest_line
9470
9471 #define bfd_elfNN_mkobject \
9472 elfNN_aarch64_mkobject
9473
9474 #define bfd_elfNN_new_section_hook \
9475 elfNN_aarch64_new_section_hook
9476
9477 #define elf_backend_adjust_dynamic_symbol \
9478 elfNN_aarch64_adjust_dynamic_symbol
9479
9480 #define elf_backend_always_size_sections \
9481 elfNN_aarch64_always_size_sections
9482
9483 #define elf_backend_check_relocs \
9484 elfNN_aarch64_check_relocs
9485
9486 #define elf_backend_copy_indirect_symbol \
9487 elfNN_aarch64_copy_indirect_symbol
9488
9489 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
9490 to them in our hash. */
9491 #define elf_backend_create_dynamic_sections \
9492 elfNN_aarch64_create_dynamic_sections
9493
9494 #define elf_backend_init_index_section \
9495 _bfd_elf_init_2_index_sections
9496
9497 #define elf_backend_finish_dynamic_sections \
9498 elfNN_aarch64_finish_dynamic_sections
9499
9500 #define elf_backend_finish_dynamic_symbol \
9501 elfNN_aarch64_finish_dynamic_symbol
9502
9503 #define elf_backend_object_p \
9504 elfNN_aarch64_object_p
9505
9506 #define elf_backend_output_arch_local_syms \
9507 elfNN_aarch64_output_arch_local_syms
9508
9509 #define elf_backend_plt_sym_val \
9510 elfNN_aarch64_plt_sym_val
9511
9512 #define elf_backend_post_process_headers \
9513 elfNN_aarch64_post_process_headers
9514
9515 #define elf_backend_relocate_section \
9516 elfNN_aarch64_relocate_section
9517
9518 #define elf_backend_reloc_type_class \
9519 elfNN_aarch64_reloc_type_class
9520
9521 #define elf_backend_section_from_shdr \
9522 elfNN_aarch64_section_from_shdr
9523
9524 #define elf_backend_size_dynamic_sections \
9525 elfNN_aarch64_size_dynamic_sections
9526
9527 #define elf_backend_size_info \
9528 elfNN_aarch64_size_info
9529
9530 #define elf_backend_write_section \
9531 elfNN_aarch64_write_section
9532
9533 #define elf_backend_symbol_processing \
9534 elfNN_aarch64_backend_symbol_processing
9535
9536 #define elf_backend_can_refcount 1
9537 #define elf_backend_can_gc_sections 1
9538 #define elf_backend_plt_readonly 1
9539 #define elf_backend_want_got_plt 1
9540 #define elf_backend_want_plt_sym 0
9541 #define elf_backend_want_dynrelro 1
9542 #define elf_backend_may_use_rel_p 0
9543 #define elf_backend_may_use_rela_p 1
9544 #define elf_backend_default_use_rela_p 1
9545 #define elf_backend_rela_normal 1
9546 #define elf_backend_dtrel_excludes_plt 1
9547 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
9548 #define elf_backend_default_execstack 0
9549 #define elf_backend_extern_protected_data 1
9550 #define elf_backend_hash_symbol elf_aarch64_hash_symbol
9551
9552 #undef elf_backend_obj_attrs_section
9553 #define elf_backend_obj_attrs_section ".ARM.attributes"
9554
9555 #include "elfNN-target.h"
9556
9557 /* CloudABI support. */
9558
9559 #undef TARGET_LITTLE_SYM
9560 #define TARGET_LITTLE_SYM aarch64_elfNN_le_cloudabi_vec
9561 #undef TARGET_LITTLE_NAME
9562 #define TARGET_LITTLE_NAME "elfNN-littleaarch64-cloudabi"
9563 #undef TARGET_BIG_SYM
9564 #define TARGET_BIG_SYM aarch64_elfNN_be_cloudabi_vec
9565 #undef TARGET_BIG_NAME
9566 #define TARGET_BIG_NAME "elfNN-bigaarch64-cloudabi"
9567
9568 #undef ELF_OSABI
9569 #define ELF_OSABI ELFOSABI_CLOUDABI
9570
9571 #undef elfNN_bed
9572 #define elfNN_bed elfNN_aarch64_cloudabi_bed
9573
9574 #include "elfNN-target.h"
GDB Binutils - Deliverables
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