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gdb/testsuite: fix gdb.trace/signal.exp on x86
[binutils-gdb/blckswan.git] / bfd / elfnn-aarch64.c
blob4926bab9cf2876d7de96edd5af82e73f74fe9040
1 /* AArch64-specific support for NN-bit ELF.
2 Copyright (C) 2009-2022 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 "elf-bfd.h"
143 #include "bfdlink.h"
144 #include "objalloc.h"
145 #include "elf/aarch64.h"
146 #include "elfxx-aarch64.h"
147 #include "cpu-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_LDST16_TPREL_LO12 \
205 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12_NC \
206 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12 \
207 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12_NC \
208 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12 \
209 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12_NC \
210 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12 \
211 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12_NC \
212 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \
213 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \
214 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
215 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \
216 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
217 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \
218 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
219 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
220 || IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
221
222 #define IS_AARCH64_TLS_RELAX_RELOC(R_TYPE) \
223 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
224 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 \
225 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
226 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
227 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
228 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
229 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC \
230 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
231 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
232 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \
233 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
234 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
235 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
236 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
237 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC \
238 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G1 \
239 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
240 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
241 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC \
242 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \
243 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \
244 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21)
245
246 #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
247 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC \
248 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
249 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 \
250 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
251 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
252 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
253 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
254 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12 \
255 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
256 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
257 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
258 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1)
259
260 #define ELIMINATE_COPY_RELOCS 1
261
262 /* Return size of a relocation entry. HTAB is the bfd's
263 elf_aarch64_link_hash_entry. */
264 #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
265
266 /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
267 #define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
268 #define PLT_ENTRY_SIZE (32)
269 #define PLT_SMALL_ENTRY_SIZE (16)
270 #define PLT_TLSDESC_ENTRY_SIZE (32)
271 /* PLT sizes with BTI insn. */
272 #define PLT_BTI_SMALL_ENTRY_SIZE (24)
273 /* PLT sizes with PAC insn. */
274 #define PLT_PAC_SMALL_ENTRY_SIZE (24)
275 /* PLT sizes with BTI and PAC insn. */
276 #define PLT_BTI_PAC_SMALL_ENTRY_SIZE (24)
277
278 /* Encoding of the nop instruction. */
279 #define INSN_NOP 0xd503201f
280
281 #define aarch64_compute_jump_table_size(htab) \
282 (((htab)->root.srelplt == NULL) ? 0 \
283 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
284
285 /* The first entry in a procedure linkage table looks like this
286 if the distance between the PLTGOT and the PLT is < 4GB use
287 these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
288 in x16 and needs to work out PLTGOT[1] by using an address of
289 [x16,#-GOT_ENTRY_SIZE]. */
290 static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] =
291 {
292 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
293 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
294 #if ARCH_SIZE == 64
295 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
296 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
297 #else
298 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
299 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
300 #endif
301 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
302 0x1f, 0x20, 0x03, 0xd5, /* nop */
303 0x1f, 0x20, 0x03, 0xd5, /* nop */
304 0x1f, 0x20, 0x03, 0xd5, /* nop */
305 };
306
307 static const bfd_byte elfNN_aarch64_small_plt0_bti_entry[PLT_ENTRY_SIZE] =
308 {
309 0x5f, 0x24, 0x03, 0xd5, /* bti c. */
310 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
311 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
312 #if ARCH_SIZE == 64
313 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
314 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
315 #else
316 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
317 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
318 #endif
319 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
320 0x1f, 0x20, 0x03, 0xd5, /* nop */
321 0x1f, 0x20, 0x03, 0xd5, /* nop */
322 };
323
324 /* Per function entry in a procedure linkage table looks like this
325 if the distance between the PLTGOT and the PLT is < 4GB use
326 these PLT entries. Use BTI versions of the PLTs when enabled. */
327 static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] =
328 {
329 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
330 #if ARCH_SIZE == 64
331 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
332 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
333 #else
334 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
335 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
336 #endif
337 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
338 };
339
340 static const bfd_byte
341 elfNN_aarch64_small_plt_bti_entry[PLT_BTI_SMALL_ENTRY_SIZE] =
342 {
343 0x5f, 0x24, 0x03, 0xd5, /* bti c. */
344 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
345 #if ARCH_SIZE == 64
346 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
347 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
348 #else
349 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
350 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
351 #endif
352 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
353 0x1f, 0x20, 0x03, 0xd5, /* nop */
354 };
355
356 static const bfd_byte
357 elfNN_aarch64_small_plt_pac_entry[PLT_PAC_SMALL_ENTRY_SIZE] =
358 {
359 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
360 #if ARCH_SIZE == 64
361 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
362 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
363 #else
364 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
365 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
366 #endif
367 0x9f, 0x21, 0x03, 0xd5, /* autia1716 */
368 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
369 0x1f, 0x20, 0x03, 0xd5, /* nop */
370 };
371
372 static const bfd_byte
373 elfNN_aarch64_small_plt_bti_pac_entry[PLT_BTI_PAC_SMALL_ENTRY_SIZE] =
374 {
375 0x5f, 0x24, 0x03, 0xd5, /* bti c. */
376 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
377 #if ARCH_SIZE == 64
378 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
379 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
380 #else
381 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
382 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
383 #endif
384 0x9f, 0x21, 0x03, 0xd5, /* autia1716 */
385 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
386 };
387
388 static const bfd_byte
389 elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] =
390 {
391 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
392 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
393 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
394 #if ARCH_SIZE == 64
395 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
396 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
397 #else
398 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
399 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
400 #endif
401 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
402 0x1f, 0x20, 0x03, 0xd5, /* nop */
403 0x1f, 0x20, 0x03, 0xd5, /* nop */
404 };
405
406 static const bfd_byte
407 elfNN_aarch64_tlsdesc_small_plt_bti_entry[PLT_TLSDESC_ENTRY_SIZE] =
408 {
409 0x5f, 0x24, 0x03, 0xd5, /* bti c. */
410 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
411 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
412 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
413 #if ARCH_SIZE == 64
414 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
415 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
416 #else
417 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
418 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
419 #endif
420 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
421 0x1f, 0x20, 0x03, 0xd5, /* nop */
422 };
423
424 #define elf_info_to_howto elfNN_aarch64_info_to_howto
425 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
426
427 #define AARCH64_ELF_ABI_VERSION 0
428
429 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
430 #define ALL_ONES (~ (bfd_vma) 0)
431
432 /* Indexed by the bfd interal reloc enumerators.
433 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
434 in reloc.c. */
435
436 static reloc_howto_type elfNN_aarch64_howto_table[] =
437 {
438 EMPTY_HOWTO (0),
439
440 /* Basic data relocations. */
441
442 /* Deprecated, but retained for backwards compatibility. */
443 HOWTO64 (R_AARCH64_NULL, /* type */
444 0, /* rightshift */
445 3, /* size (0 = byte, 1 = short, 2 = long) */
446 0, /* bitsize */
447 false, /* pc_relative */
448 0, /* bitpos */
449 complain_overflow_dont, /* complain_on_overflow */
450 bfd_elf_generic_reloc, /* special_function */
451 "R_AARCH64_NULL", /* name */
452 false, /* partial_inplace */
453 0, /* src_mask */
454 0, /* dst_mask */
455 false), /* pcrel_offset */
456 HOWTO (R_AARCH64_NONE, /* type */
457 0, /* rightshift */
458 3, /* size (0 = byte, 1 = short, 2 = long) */
459 0, /* bitsize */
460 false, /* pc_relative */
461 0, /* bitpos */
462 complain_overflow_dont, /* complain_on_overflow */
463 bfd_elf_generic_reloc, /* special_function */
464 "R_AARCH64_NONE", /* name */
465 false, /* partial_inplace */
466 0, /* src_mask */
467 0, /* dst_mask */
468 false), /* pcrel_offset */
469
470 /* .xword: (S+A) */
471 HOWTO64 (AARCH64_R (ABS64), /* type */
472 0, /* rightshift */
473 4, /* size (4 = long long) */
474 64, /* bitsize */
475 false, /* pc_relative */
476 0, /* bitpos */
477 complain_overflow_unsigned, /* complain_on_overflow */
478 bfd_elf_generic_reloc, /* special_function */
479 AARCH64_R_STR (ABS64), /* name */
480 false, /* partial_inplace */
481 ALL_ONES, /* src_mask */
482 ALL_ONES, /* dst_mask */
483 false), /* pcrel_offset */
484
485 /* .word: (S+A) */
486 HOWTO (AARCH64_R (ABS32), /* type */
487 0, /* rightshift */
488 2, /* size (0 = byte, 1 = short, 2 = long) */
489 32, /* bitsize */
490 false, /* pc_relative */
491 0, /* bitpos */
492 complain_overflow_unsigned, /* complain_on_overflow */
493 bfd_elf_generic_reloc, /* special_function */
494 AARCH64_R_STR (ABS32), /* name */
495 false, /* partial_inplace */
496 0xffffffff, /* src_mask */
497 0xffffffff, /* dst_mask */
498 false), /* pcrel_offset */
499
500 /* .half: (S+A) */
501 HOWTO (AARCH64_R (ABS16), /* type */
502 0, /* rightshift */
503 1, /* size (0 = byte, 1 = short, 2 = long) */
504 16, /* bitsize */
505 false, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_unsigned, /* complain_on_overflow */
508 bfd_elf_generic_reloc, /* special_function */
509 AARCH64_R_STR (ABS16), /* name */
510 false, /* partial_inplace */
511 0xffff, /* src_mask */
512 0xffff, /* dst_mask */
513 false), /* pcrel_offset */
514
515 /* .xword: (S+A-P) */
516 HOWTO64 (AARCH64_R (PREL64), /* type */
517 0, /* rightshift */
518 4, /* size (4 = long long) */
519 64, /* bitsize */
520 true, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_signed, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 AARCH64_R_STR (PREL64), /* name */
525 false, /* partial_inplace */
526 ALL_ONES, /* src_mask */
527 ALL_ONES, /* dst_mask */
528 true), /* pcrel_offset */
529
530 /* .word: (S+A-P) */
531 HOWTO (AARCH64_R (PREL32), /* type */
532 0, /* rightshift */
533 2, /* size (0 = byte, 1 = short, 2 = long) */
534 32, /* bitsize */
535 true, /* pc_relative */
536 0, /* bitpos */
537 complain_overflow_signed, /* complain_on_overflow */
538 bfd_elf_generic_reloc, /* special_function */
539 AARCH64_R_STR (PREL32), /* name */
540 false, /* partial_inplace */
541 0xffffffff, /* src_mask */
542 0xffffffff, /* dst_mask */
543 true), /* pcrel_offset */
544
545 /* .half: (S+A-P) */
546 HOWTO (AARCH64_R (PREL16), /* type */
547 0, /* rightshift */
548 1, /* size (0 = byte, 1 = short, 2 = long) */
549 16, /* bitsize */
550 true, /* pc_relative */
551 0, /* bitpos */
552 complain_overflow_signed, /* complain_on_overflow */
553 bfd_elf_generic_reloc, /* special_function */
554 AARCH64_R_STR (PREL16), /* name */
555 false, /* partial_inplace */
556 0xffff, /* src_mask */
557 0xffff, /* dst_mask */
558 true), /* pcrel_offset */
559
560 /* Group relocations to create a 16, 32, 48 or 64 bit
561 unsigned data or abs address inline. */
562
563 /* MOVZ: ((S+A) >> 0) & 0xffff */
564 HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */
565 0, /* rightshift */
566 2, /* size (0 = byte, 1 = short, 2 = long) */
567 16, /* bitsize */
568 false, /* pc_relative */
569 0, /* bitpos */
570 complain_overflow_unsigned, /* complain_on_overflow */
571 bfd_elf_generic_reloc, /* special_function */
572 AARCH64_R_STR (MOVW_UABS_G0), /* name */
573 false, /* partial_inplace */
574 0xffff, /* src_mask */
575 0xffff, /* dst_mask */
576 false), /* pcrel_offset */
577
578 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
579 HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */
580 0, /* rightshift */
581 2, /* size (0 = byte, 1 = short, 2 = long) */
582 16, /* bitsize */
583 false, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_dont, /* complain_on_overflow */
586 bfd_elf_generic_reloc, /* special_function */
587 AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */
588 false, /* partial_inplace */
589 0xffff, /* src_mask */
590 0xffff, /* dst_mask */
591 false), /* pcrel_offset */
592
593 /* MOVZ: ((S+A) >> 16) & 0xffff */
594 HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */
595 16, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 16, /* bitsize */
598 false, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_unsigned, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 AARCH64_R_STR (MOVW_UABS_G1), /* name */
603 false, /* partial_inplace */
604 0xffff, /* src_mask */
605 0xffff, /* dst_mask */
606 false), /* pcrel_offset */
607
608 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
609 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */
610 16, /* rightshift */
611 2, /* size (0 = byte, 1 = short, 2 = long) */
612 16, /* bitsize */
613 false, /* pc_relative */
614 0, /* bitpos */
615 complain_overflow_dont, /* complain_on_overflow */
616 bfd_elf_generic_reloc, /* special_function */
617 AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */
618 false, /* partial_inplace */
619 0xffff, /* src_mask */
620 0xffff, /* dst_mask */
621 false), /* pcrel_offset */
622
623 /* MOVZ: ((S+A) >> 32) & 0xffff */
624 HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */
625 32, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 16, /* bitsize */
628 false, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_unsigned, /* complain_on_overflow */
631 bfd_elf_generic_reloc, /* special_function */
632 AARCH64_R_STR (MOVW_UABS_G2), /* name */
633 false, /* partial_inplace */
634 0xffff, /* src_mask */
635 0xffff, /* dst_mask */
636 false), /* pcrel_offset */
637
638 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
639 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */
640 32, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 16, /* bitsize */
643 false, /* pc_relative */
644 0, /* bitpos */
645 complain_overflow_dont, /* complain_on_overflow */
646 bfd_elf_generic_reloc, /* special_function */
647 AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */
648 false, /* partial_inplace */
649 0xffff, /* src_mask */
650 0xffff, /* dst_mask */
651 false), /* pcrel_offset */
652
653 /* MOVZ: ((S+A) >> 48) & 0xffff */
654 HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */
655 48, /* rightshift */
656 2, /* size (0 = byte, 1 = short, 2 = long) */
657 16, /* bitsize */
658 false, /* pc_relative */
659 0, /* bitpos */
660 complain_overflow_unsigned, /* complain_on_overflow */
661 bfd_elf_generic_reloc, /* special_function */
662 AARCH64_R_STR (MOVW_UABS_G3), /* name */
663 false, /* partial_inplace */
664 0xffff, /* src_mask */
665 0xffff, /* dst_mask */
666 false), /* pcrel_offset */
667
668 /* Group relocations to create high part of a 16, 32, 48 or 64 bit
669 signed data or abs address inline. Will change instruction
670 to MOVN or MOVZ depending on sign of calculated value. */
671
672 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
673 HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */
674 0, /* rightshift */
675 2, /* size (0 = byte, 1 = short, 2 = long) */
676 17, /* bitsize */
677 false, /* pc_relative */
678 0, /* bitpos */
679 complain_overflow_signed, /* complain_on_overflow */
680 bfd_elf_generic_reloc, /* special_function */
681 AARCH64_R_STR (MOVW_SABS_G0), /* name */
682 false, /* partial_inplace */
683 0xffff, /* src_mask */
684 0xffff, /* dst_mask */
685 false), /* pcrel_offset */
686
687 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
688 HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */
689 16, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 17, /* bitsize */
692 false, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_signed, /* complain_on_overflow */
695 bfd_elf_generic_reloc, /* special_function */
696 AARCH64_R_STR (MOVW_SABS_G1), /* name */
697 false, /* partial_inplace */
698 0xffff, /* src_mask */
699 0xffff, /* dst_mask */
700 false), /* pcrel_offset */
701
702 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
703 HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */
704 32, /* rightshift */
705 2, /* size (0 = byte, 1 = short, 2 = long) */
706 17, /* bitsize */
707 false, /* pc_relative */
708 0, /* bitpos */
709 complain_overflow_signed, /* complain_on_overflow */
710 bfd_elf_generic_reloc, /* special_function */
711 AARCH64_R_STR (MOVW_SABS_G2), /* name */
712 false, /* partial_inplace */
713 0xffff, /* src_mask */
714 0xffff, /* dst_mask */
715 false), /* pcrel_offset */
716
717 /* Group relocations to create a 16, 32, 48 or 64 bit
718 PC relative address inline. */
719
720 /* MOV[NZ]: ((S+A-P) >> 0) & 0xffff */
721 HOWTO (AARCH64_R (MOVW_PREL_G0), /* type */
722 0, /* rightshift */
723 2, /* size (0 = byte, 1 = short, 2 = long) */
724 17, /* bitsize */
725 true, /* pc_relative */
726 0, /* bitpos */
727 complain_overflow_signed, /* complain_on_overflow */
728 bfd_elf_generic_reloc, /* special_function */
729 AARCH64_R_STR (MOVW_PREL_G0), /* name */
730 false, /* partial_inplace */
731 0xffff, /* src_mask */
732 0xffff, /* dst_mask */
733 true), /* pcrel_offset */
734
735 /* MOVK: ((S+A-P) >> 0) & 0xffff [no overflow check] */
736 HOWTO (AARCH64_R (MOVW_PREL_G0_NC), /* type */
737 0, /* rightshift */
738 2, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 true, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_dont, /* complain_on_overflow */
743 bfd_elf_generic_reloc, /* special_function */
744 AARCH64_R_STR (MOVW_PREL_G0_NC), /* name */
745 false, /* partial_inplace */
746 0xffff, /* src_mask */
747 0xffff, /* dst_mask */
748 true), /* pcrel_offset */
749
750 /* MOV[NZ]: ((S+A-P) >> 16) & 0xffff */
751 HOWTO (AARCH64_R (MOVW_PREL_G1), /* type */
752 16, /* rightshift */
753 2, /* size (0 = byte, 1 = short, 2 = long) */
754 17, /* bitsize */
755 true, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_signed, /* complain_on_overflow */
758 bfd_elf_generic_reloc, /* special_function */
759 AARCH64_R_STR (MOVW_PREL_G1), /* name */
760 false, /* partial_inplace */
761 0xffff, /* src_mask */
762 0xffff, /* dst_mask */
763 true), /* pcrel_offset */
764
765 /* MOVK: ((S+A-P) >> 16) & 0xffff [no overflow check] */
766 HOWTO64 (AARCH64_R (MOVW_PREL_G1_NC), /* type */
767 16, /* rightshift */
768 2, /* size (0 = byte, 1 = short, 2 = long) */
769 16, /* bitsize */
770 true, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 bfd_elf_generic_reloc, /* special_function */
774 AARCH64_R_STR (MOVW_PREL_G1_NC), /* name */
775 false, /* partial_inplace */
776 0xffff, /* src_mask */
777 0xffff, /* dst_mask */
778 true), /* pcrel_offset */
779
780 /* MOV[NZ]: ((S+A-P) >> 32) & 0xffff */
781 HOWTO64 (AARCH64_R (MOVW_PREL_G2), /* type */
782 32, /* rightshift */
783 2, /* size (0 = byte, 1 = short, 2 = long) */
784 17, /* bitsize */
785 true, /* pc_relative */
786 0, /* bitpos */
787 complain_overflow_signed, /* complain_on_overflow */
788 bfd_elf_generic_reloc, /* special_function */
789 AARCH64_R_STR (MOVW_PREL_G2), /* name */
790 false, /* partial_inplace */
791 0xffff, /* src_mask */
792 0xffff, /* dst_mask */
793 true), /* pcrel_offset */
794
795 /* MOVK: ((S+A-P) >> 32) & 0xffff [no overflow check] */
796 HOWTO64 (AARCH64_R (MOVW_PREL_G2_NC), /* type */
797 32, /* rightshift */
798 2, /* size (0 = byte, 1 = short, 2 = long) */
799 16, /* bitsize */
800 true, /* pc_relative */
801 0, /* bitpos */
802 complain_overflow_dont, /* complain_on_overflow */
803 bfd_elf_generic_reloc, /* special_function */
804 AARCH64_R_STR (MOVW_PREL_G2_NC), /* name */
805 false, /* partial_inplace */
806 0xffff, /* src_mask */
807 0xffff, /* dst_mask */
808 true), /* pcrel_offset */
809
810 /* MOV[NZ]: ((S+A-P) >> 48) & 0xffff */
811 HOWTO64 (AARCH64_R (MOVW_PREL_G3), /* type */
812 48, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 16, /* bitsize */
815 true, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 AARCH64_R_STR (MOVW_PREL_G3), /* name */
820 false, /* partial_inplace */
821 0xffff, /* src_mask */
822 0xffff, /* dst_mask */
823 true), /* pcrel_offset */
824
825 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
826 addresses: PG(x) is (x & ~0xfff). */
827
828 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
829 HOWTO (AARCH64_R (LD_PREL_LO19), /* type */
830 2, /* rightshift */
831 2, /* size (0 = byte, 1 = short, 2 = long) */
832 19, /* bitsize */
833 true, /* pc_relative */
834 0, /* bitpos */
835 complain_overflow_signed, /* complain_on_overflow */
836 bfd_elf_generic_reloc, /* special_function */
837 AARCH64_R_STR (LD_PREL_LO19), /* name */
838 false, /* partial_inplace */
839 0x7ffff, /* src_mask */
840 0x7ffff, /* dst_mask */
841 true), /* pcrel_offset */
842
843 /* ADR: (S+A-P) & 0x1fffff */
844 HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */
845 0, /* rightshift */
846 2, /* size (0 = byte, 1 = short, 2 = long) */
847 21, /* bitsize */
848 true, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_signed, /* complain_on_overflow */
851 bfd_elf_generic_reloc, /* special_function */
852 AARCH64_R_STR (ADR_PREL_LO21), /* name */
853 false, /* partial_inplace */
854 0x1fffff, /* src_mask */
855 0x1fffff, /* dst_mask */
856 true), /* pcrel_offset */
857
858 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
859 HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */
860 12, /* rightshift */
861 2, /* size (0 = byte, 1 = short, 2 = long) */
862 21, /* bitsize */
863 true, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_signed, /* complain_on_overflow */
866 bfd_elf_generic_reloc, /* special_function */
867 AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */
868 false, /* partial_inplace */
869 0x1fffff, /* src_mask */
870 0x1fffff, /* dst_mask */
871 true), /* pcrel_offset */
872
873 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
874 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */
875 12, /* rightshift */
876 2, /* size (0 = byte, 1 = short, 2 = long) */
877 21, /* bitsize */
878 true, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_dont, /* complain_on_overflow */
881 bfd_elf_generic_reloc, /* special_function */
882 AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */
883 false, /* partial_inplace */
884 0x1fffff, /* src_mask */
885 0x1fffff, /* dst_mask */
886 true), /* pcrel_offset */
887
888 /* ADD: (S+A) & 0xfff [no overflow check] */
889 HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */
890 0, /* rightshift */
891 2, /* size (0 = byte, 1 = short, 2 = long) */
892 12, /* bitsize */
893 false, /* pc_relative */
894 10, /* bitpos */
895 complain_overflow_dont, /* complain_on_overflow */
896 bfd_elf_generic_reloc, /* special_function */
897 AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */
898 false, /* partial_inplace */
899 0x3ffc00, /* src_mask */
900 0x3ffc00, /* dst_mask */
901 false), /* pcrel_offset */
902
903 /* LD/ST8: (S+A) & 0xfff */
904 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */
905 0, /* rightshift */
906 2, /* size (0 = byte, 1 = short, 2 = long) */
907 12, /* bitsize */
908 false, /* pc_relative */
909 0, /* bitpos */
910 complain_overflow_dont, /* complain_on_overflow */
911 bfd_elf_generic_reloc, /* special_function */
912 AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */
913 false, /* partial_inplace */
914 0xfff, /* src_mask */
915 0xfff, /* dst_mask */
916 false), /* pcrel_offset */
917
918 /* Relocations for control-flow instructions. */
919
920 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
921 HOWTO (AARCH64_R (TSTBR14), /* type */
922 2, /* rightshift */
923 2, /* size (0 = byte, 1 = short, 2 = long) */
924 14, /* bitsize */
925 true, /* pc_relative */
926 0, /* bitpos */
927 complain_overflow_signed, /* complain_on_overflow */
928 bfd_elf_generic_reloc, /* special_function */
929 AARCH64_R_STR (TSTBR14), /* name */
930 false, /* partial_inplace */
931 0x3fff, /* src_mask */
932 0x3fff, /* dst_mask */
933 true), /* pcrel_offset */
934
935 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
936 HOWTO (AARCH64_R (CONDBR19), /* type */
937 2, /* rightshift */
938 2, /* size (0 = byte, 1 = short, 2 = long) */
939 19, /* bitsize */
940 true, /* pc_relative */
941 0, /* bitpos */
942 complain_overflow_signed, /* complain_on_overflow */
943 bfd_elf_generic_reloc, /* special_function */
944 AARCH64_R_STR (CONDBR19), /* name */
945 false, /* partial_inplace */
946 0x7ffff, /* src_mask */
947 0x7ffff, /* dst_mask */
948 true), /* pcrel_offset */
949
950 /* B: ((S+A-P) >> 2) & 0x3ffffff */
951 HOWTO (AARCH64_R (JUMP26), /* type */
952 2, /* rightshift */
953 2, /* size (0 = byte, 1 = short, 2 = long) */
954 26, /* bitsize */
955 true, /* pc_relative */
956 0, /* bitpos */
957 complain_overflow_signed, /* complain_on_overflow */
958 bfd_elf_generic_reloc, /* special_function */
959 AARCH64_R_STR (JUMP26), /* name */
960 false, /* partial_inplace */
961 0x3ffffff, /* src_mask */
962 0x3ffffff, /* dst_mask */
963 true), /* pcrel_offset */
964
965 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
966 HOWTO (AARCH64_R (CALL26), /* type */
967 2, /* rightshift */
968 2, /* size (0 = byte, 1 = short, 2 = long) */
969 26, /* bitsize */
970 true, /* pc_relative */
971 0, /* bitpos */
972 complain_overflow_signed, /* complain_on_overflow */
973 bfd_elf_generic_reloc, /* special_function */
974 AARCH64_R_STR (CALL26), /* name */
975 false, /* partial_inplace */
976 0x3ffffff, /* src_mask */
977 0x3ffffff, /* dst_mask */
978 true), /* pcrel_offset */
979
980 /* LD/ST16: (S+A) & 0xffe */
981 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */
982 1, /* rightshift */
983 2, /* size (0 = byte, 1 = short, 2 = long) */
984 12, /* bitsize */
985 false, /* pc_relative */
986 0, /* bitpos */
987 complain_overflow_dont, /* complain_on_overflow */
988 bfd_elf_generic_reloc, /* special_function */
989 AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */
990 false, /* partial_inplace */
991 0xffe, /* src_mask */
992 0xffe, /* dst_mask */
993 false), /* pcrel_offset */
994
995 /* LD/ST32: (S+A) & 0xffc */
996 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */
997 2, /* rightshift */
998 2, /* size (0 = byte, 1 = short, 2 = long) */
999 12, /* bitsize */
1000 false, /* pc_relative */
1001 0, /* bitpos */
1002 complain_overflow_dont, /* complain_on_overflow */
1003 bfd_elf_generic_reloc, /* special_function */
1004 AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */
1005 false, /* partial_inplace */
1006 0xffc, /* src_mask */
1007 0xffc, /* dst_mask */
1008 false), /* pcrel_offset */
1009
1010 /* LD/ST64: (S+A) & 0xff8 */
1011 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */
1012 3, /* rightshift */
1013 2, /* size (0 = byte, 1 = short, 2 = long) */
1014 12, /* bitsize */
1015 false, /* pc_relative */
1016 0, /* bitpos */
1017 complain_overflow_dont, /* complain_on_overflow */
1018 bfd_elf_generic_reloc, /* special_function */
1019 AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */
1020 false, /* partial_inplace */
1021 0xff8, /* src_mask */
1022 0xff8, /* dst_mask */
1023 false), /* pcrel_offset */
1024
1025 /* LD/ST128: (S+A) & 0xff0 */
1026 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */
1027 4, /* rightshift */
1028 2, /* size (0 = byte, 1 = short, 2 = long) */
1029 12, /* bitsize */
1030 false, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont, /* complain_on_overflow */
1033 bfd_elf_generic_reloc, /* special_function */
1034 AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */
1035 false, /* partial_inplace */
1036 0xff0, /* src_mask */
1037 0xff0, /* dst_mask */
1038 false), /* pcrel_offset */
1039
1040 /* Set a load-literal immediate field to bits
1041 0x1FFFFC of G(S)-P */
1042 HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */
1043 2, /* rightshift */
1044 2, /* size (0 = byte,1 = short,2 = long) */
1045 19, /* bitsize */
1046 true, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_signed, /* complain_on_overflow */
1049 bfd_elf_generic_reloc, /* special_function */
1050 AARCH64_R_STR (GOT_LD_PREL19), /* name */
1051 false, /* partial_inplace */
1052 0xffffe0, /* src_mask */
1053 0xffffe0, /* dst_mask */
1054 true), /* pcrel_offset */
1055
1056 /* Get to the page for the GOT entry for the symbol
1057 (G(S) - P) using an ADRP instruction. */
1058 HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */
1059 12, /* rightshift */
1060 2, /* size (0 = byte, 1 = short, 2 = long) */
1061 21, /* bitsize */
1062 true, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_dont, /* complain_on_overflow */
1065 bfd_elf_generic_reloc, /* special_function */
1066 AARCH64_R_STR (ADR_GOT_PAGE), /* name */
1067 false, /* partial_inplace */
1068 0x1fffff, /* src_mask */
1069 0x1fffff, /* dst_mask */
1070 true), /* pcrel_offset */
1071
1072 /* LD64: GOT offset G(S) & 0xff8 */
1073 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */
1074 3, /* rightshift */
1075 2, /* size (0 = byte, 1 = short, 2 = long) */
1076 12, /* bitsize */
1077 false, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 bfd_elf_generic_reloc, /* special_function */
1081 AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */
1082 false, /* partial_inplace */
1083 0xff8, /* src_mask */
1084 0xff8, /* dst_mask */
1085 false), /* pcrel_offset */
1086
1087 /* LD32: GOT offset G(S) & 0xffc */
1088 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */
1089 2, /* rightshift */
1090 2, /* size (0 = byte, 1 = short, 2 = long) */
1091 12, /* bitsize */
1092 false, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 bfd_elf_generic_reloc, /* special_function */
1096 AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */
1097 false, /* partial_inplace */
1098 0xffc, /* src_mask */
1099 0xffc, /* dst_mask */
1100 false), /* pcrel_offset */
1101
1102 /* Lower 16 bits of GOT offset for the symbol. */
1103 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G0_NC), /* type */
1104 0, /* rightshift */
1105 2, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 false, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 bfd_elf_generic_reloc, /* special_function */
1111 AARCH64_R_STR (MOVW_GOTOFF_G0_NC), /* name */
1112 false, /* partial_inplace */
1113 0xffff, /* src_mask */
1114 0xffff, /* dst_mask */
1115 false), /* pcrel_offset */
1116
1117 /* Higher 16 bits of GOT offset for the symbol. */
1118 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G1), /* type */
1119 16, /* rightshift */
1120 2, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 false, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_unsigned, /* complain_on_overflow */
1125 bfd_elf_generic_reloc, /* special_function */
1126 AARCH64_R_STR (MOVW_GOTOFF_G1), /* name */
1127 false, /* partial_inplace */
1128 0xffff, /* src_mask */
1129 0xffff, /* dst_mask */
1130 false), /* pcrel_offset */
1131
1132 /* LD64: GOT offset for the symbol. */
1133 HOWTO64 (AARCH64_R (LD64_GOTOFF_LO15), /* type */
1134 3, /* rightshift */
1135 2, /* size (0 = byte, 1 = short, 2 = long) */
1136 12, /* bitsize */
1137 false, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_unsigned, /* complain_on_overflow */
1140 bfd_elf_generic_reloc, /* special_function */
1141 AARCH64_R_STR (LD64_GOTOFF_LO15), /* name */
1142 false, /* partial_inplace */
1143 0x7ff8, /* src_mask */
1144 0x7ff8, /* dst_mask */
1145 false), /* pcrel_offset */
1146
1147 /* LD32: GOT offset to the page address of GOT table.
1148 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x5ffc. */
1149 HOWTO32 (AARCH64_R (LD32_GOTPAGE_LO14), /* type */
1150 2, /* rightshift */
1151 2, /* size (0 = byte, 1 = short, 2 = long) */
1152 12, /* bitsize */
1153 false, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_unsigned, /* complain_on_overflow */
1156 bfd_elf_generic_reloc, /* special_function */
1157 AARCH64_R_STR (LD32_GOTPAGE_LO14), /* name */
1158 false, /* partial_inplace */
1159 0x5ffc, /* src_mask */
1160 0x5ffc, /* dst_mask */
1161 false), /* pcrel_offset */
1162
1163 /* LD64: GOT offset to the page address of GOT table.
1164 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x7ff8. */
1165 HOWTO64 (AARCH64_R (LD64_GOTPAGE_LO15), /* type */
1166 3, /* rightshift */
1167 2, /* size (0 = byte, 1 = short, 2 = long) */
1168 12, /* bitsize */
1169 false, /* pc_relative */
1170 0, /* bitpos */
1171 complain_overflow_unsigned, /* complain_on_overflow */
1172 bfd_elf_generic_reloc, /* special_function */
1173 AARCH64_R_STR (LD64_GOTPAGE_LO15), /* name */
1174 false, /* partial_inplace */
1175 0x7ff8, /* src_mask */
1176 0x7ff8, /* dst_mask */
1177 false), /* pcrel_offset */
1178
1179 /* Get to the page for the GOT entry for the symbol
1180 (G(S) - P) using an ADRP instruction. */
1181 HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */
1182 12, /* rightshift */
1183 2, /* size (0 = byte, 1 = short, 2 = long) */
1184 21, /* bitsize */
1185 true, /* pc_relative */
1186 0, /* bitpos */
1187 complain_overflow_dont, /* complain_on_overflow */
1188 bfd_elf_generic_reloc, /* special_function */
1189 AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */
1190 false, /* partial_inplace */
1191 0x1fffff, /* src_mask */
1192 0x1fffff, /* dst_mask */
1193 true), /* pcrel_offset */
1194
1195 HOWTO (AARCH64_R (TLSGD_ADR_PREL21), /* type */
1196 0, /* rightshift */
1197 2, /* size (0 = byte, 1 = short, 2 = long) */
1198 21, /* bitsize */
1199 true, /* pc_relative */
1200 0, /* bitpos */
1201 complain_overflow_dont, /* complain_on_overflow */
1202 bfd_elf_generic_reloc, /* special_function */
1203 AARCH64_R_STR (TLSGD_ADR_PREL21), /* name */
1204 false, /* partial_inplace */
1205 0x1fffff, /* src_mask */
1206 0x1fffff, /* dst_mask */
1207 true), /* pcrel_offset */
1208
1209 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1210 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */
1211 0, /* rightshift */
1212 2, /* size (0 = byte, 1 = short, 2 = long) */
1213 12, /* bitsize */
1214 false, /* pc_relative */
1215 0, /* bitpos */
1216 complain_overflow_dont, /* complain_on_overflow */
1217 bfd_elf_generic_reloc, /* special_function */
1218 AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */
1219 false, /* partial_inplace */
1220 0xfff, /* src_mask */
1221 0xfff, /* dst_mask */
1222 false), /* pcrel_offset */
1223
1224 /* Lower 16 bits of GOT offset to tls_index. */
1225 HOWTO64 (AARCH64_R (TLSGD_MOVW_G0_NC), /* type */
1226 0, /* rightshift */
1227 2, /* size (0 = byte, 1 = short, 2 = long) */
1228 16, /* bitsize */
1229 false, /* pc_relative */
1230 0, /* bitpos */
1231 complain_overflow_dont, /* complain_on_overflow */
1232 bfd_elf_generic_reloc, /* special_function */
1233 AARCH64_R_STR (TLSGD_MOVW_G0_NC), /* name */
1234 false, /* partial_inplace */
1235 0xffff, /* src_mask */
1236 0xffff, /* dst_mask */
1237 false), /* pcrel_offset */
1238
1239 /* Higher 16 bits of GOT offset to tls_index. */
1240 HOWTO64 (AARCH64_R (TLSGD_MOVW_G1), /* type */
1241 16, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 16, /* bitsize */
1244 false, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_unsigned, /* complain_on_overflow */
1247 bfd_elf_generic_reloc, /* special_function */
1248 AARCH64_R_STR (TLSGD_MOVW_G1), /* name */
1249 false, /* partial_inplace */
1250 0xffff, /* src_mask */
1251 0xffff, /* dst_mask */
1252 false), /* pcrel_offset */
1253
1254 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */
1255 12, /* rightshift */
1256 2, /* size (0 = byte, 1 = short, 2 = long) */
1257 21, /* bitsize */
1258 false, /* pc_relative */
1259 0, /* bitpos */
1260 complain_overflow_dont, /* complain_on_overflow */
1261 bfd_elf_generic_reloc, /* special_function */
1262 AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */
1263 false, /* partial_inplace */
1264 0x1fffff, /* src_mask */
1265 0x1fffff, /* dst_mask */
1266 false), /* pcrel_offset */
1267
1268 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */
1269 3, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 12, /* bitsize */
1272 false, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */
1277 false, /* partial_inplace */
1278 0xff8, /* src_mask */
1279 0xff8, /* dst_mask */
1280 false), /* pcrel_offset */
1281
1282 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */
1283 2, /* rightshift */
1284 2, /* size (0 = byte, 1 = short, 2 = long) */
1285 12, /* bitsize */
1286 false, /* pc_relative */
1287 0, /* bitpos */
1288 complain_overflow_dont, /* complain_on_overflow */
1289 bfd_elf_generic_reloc, /* special_function */
1290 AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */
1291 false, /* partial_inplace */
1292 0xffc, /* src_mask */
1293 0xffc, /* dst_mask */
1294 false), /* pcrel_offset */
1295
1296 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */
1297 2, /* rightshift */
1298 2, /* size (0 = byte, 1 = short, 2 = long) */
1299 19, /* bitsize */
1300 false, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_dont, /* complain_on_overflow */
1303 bfd_elf_generic_reloc, /* special_function */
1304 AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */
1305 false, /* partial_inplace */
1306 0x1ffffc, /* src_mask */
1307 0x1ffffc, /* dst_mask */
1308 false), /* pcrel_offset */
1309
1310 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */
1311 0, /* rightshift */
1312 2, /* size (0 = byte, 1 = short, 2 = long) */
1313 16, /* bitsize */
1314 false, /* pc_relative */
1315 0, /* bitpos */
1316 complain_overflow_dont, /* complain_on_overflow */
1317 bfd_elf_generic_reloc, /* special_function */
1318 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */
1319 false, /* partial_inplace */
1320 0xffff, /* src_mask */
1321 0xffff, /* dst_mask */
1322 false), /* pcrel_offset */
1323
1324 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */
1325 16, /* rightshift */
1326 2, /* size (0 = byte, 1 = short, 2 = long) */
1327 16, /* bitsize */
1328 false, /* pc_relative */
1329 0, /* bitpos */
1330 complain_overflow_unsigned, /* complain_on_overflow */
1331 bfd_elf_generic_reloc, /* special_function */
1332 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */
1333 false, /* partial_inplace */
1334 0xffff, /* src_mask */
1335 0xffff, /* dst_mask */
1336 false), /* pcrel_offset */
1337
1338 /* ADD: bit[23:12] of byte offset to module TLS base address. */
1339 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_HI12), /* type */
1340 12, /* rightshift */
1341 2, /* size (0 = byte, 1 = short, 2 = long) */
1342 12, /* bitsize */
1343 false, /* pc_relative */
1344 0, /* bitpos */
1345 complain_overflow_unsigned, /* complain_on_overflow */
1346 bfd_elf_generic_reloc, /* special_function */
1347 AARCH64_R_STR (TLSLD_ADD_DTPREL_HI12), /* name */
1348 false, /* partial_inplace */
1349 0xfff, /* src_mask */
1350 0xfff, /* dst_mask */
1351 false), /* pcrel_offset */
1352
1353 /* Unsigned 12 bit byte offset to module TLS base address. */
1354 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12), /* type */
1355 0, /* rightshift */
1356 2, /* size (0 = byte, 1 = short, 2 = long) */
1357 12, /* bitsize */
1358 false, /* pc_relative */
1359 0, /* bitpos */
1360 complain_overflow_unsigned, /* complain_on_overflow */
1361 bfd_elf_generic_reloc, /* special_function */
1362 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12), /* name */
1363 false, /* partial_inplace */
1364 0xfff, /* src_mask */
1365 0xfff, /* dst_mask */
1366 false), /* pcrel_offset */
1367
1368 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12. */
1369 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12_NC), /* type */
1370 0, /* rightshift */
1371 2, /* size (0 = byte, 1 = short, 2 = long) */
1372 12, /* bitsize */
1373 false, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_dont, /* complain_on_overflow */
1376 bfd_elf_generic_reloc, /* special_function */
1377 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12_NC), /* name */
1378 false, /* partial_inplace */
1379 0xfff, /* src_mask */
1380 0xfff, /* dst_mask */
1381 false), /* pcrel_offset */
1382
1383 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1384 HOWTO (AARCH64_R (TLSLD_ADD_LO12_NC), /* type */
1385 0, /* rightshift */
1386 2, /* size (0 = byte, 1 = short, 2 = long) */
1387 12, /* bitsize */
1388 false, /* pc_relative */
1389 0, /* bitpos */
1390 complain_overflow_dont, /* complain_on_overflow */
1391 bfd_elf_generic_reloc, /* special_function */
1392 AARCH64_R_STR (TLSLD_ADD_LO12_NC), /* name */
1393 false, /* partial_inplace */
1394 0xfff, /* src_mask */
1395 0xfff, /* dst_mask */
1396 false), /* pcrel_offset */
1397
1398 /* Get to the page for the GOT entry for the symbol
1399 (G(S) - P) using an ADRP instruction. */
1400 HOWTO (AARCH64_R (TLSLD_ADR_PAGE21), /* type */
1401 12, /* rightshift */
1402 2, /* size (0 = byte, 1 = short, 2 = long) */
1403 21, /* bitsize */
1404 true, /* pc_relative */
1405 0, /* bitpos */
1406 complain_overflow_signed, /* complain_on_overflow */
1407 bfd_elf_generic_reloc, /* special_function */
1408 AARCH64_R_STR (TLSLD_ADR_PAGE21), /* name */
1409 false, /* partial_inplace */
1410 0x1fffff, /* src_mask */
1411 0x1fffff, /* dst_mask */
1412 true), /* pcrel_offset */
1413
1414 HOWTO (AARCH64_R (TLSLD_ADR_PREL21), /* type */
1415 0, /* rightshift */
1416 2, /* size (0 = byte, 1 = short, 2 = long) */
1417 21, /* bitsize */
1418 true, /* pc_relative */
1419 0, /* bitpos */
1420 complain_overflow_signed, /* complain_on_overflow */
1421 bfd_elf_generic_reloc, /* special_function */
1422 AARCH64_R_STR (TLSLD_ADR_PREL21), /* name */
1423 false, /* partial_inplace */
1424 0x1fffff, /* src_mask */
1425 0x1fffff, /* dst_mask */
1426 true), /* pcrel_offset */
1427
1428 /* LD/ST16: bit[11:1] of byte offset to module TLS base address. */
1429 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12), /* type */
1430 1, /* rightshift */
1431 2, /* size (0 = byte, 1 = short, 2 = long) */
1432 11, /* bitsize */
1433 false, /* pc_relative */
1434 10, /* bitpos */
1435 complain_overflow_unsigned, /* complain_on_overflow */
1436 bfd_elf_generic_reloc, /* special_function */
1437 AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12), /* name */
1438 false, /* partial_inplace */
1439 0x1ffc00, /* src_mask */
1440 0x1ffc00, /* dst_mask */
1441 false), /* pcrel_offset */
1442
1443 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12, but no overflow check. */
1444 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12_NC), /* type */
1445 1, /* rightshift */
1446 2, /* size (0 = byte, 1 = short, 2 = long) */
1447 11, /* bitsize */
1448 false, /* pc_relative */
1449 10, /* bitpos */
1450 complain_overflow_dont, /* complain_on_overflow */
1451 bfd_elf_generic_reloc, /* special_function */
1452 AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12_NC), /* name */
1453 false, /* partial_inplace */
1454 0x1ffc00, /* src_mask */
1455 0x1ffc00, /* dst_mask */
1456 false), /* pcrel_offset */
1457
1458 /* LD/ST32: bit[11:2] of byte offset to module TLS base address. */
1459 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12), /* type */
1460 2, /* rightshift */
1461 2, /* size (0 = byte, 1 = short, 2 = long) */
1462 10, /* bitsize */
1463 false, /* pc_relative */
1464 10, /* bitpos */
1465 complain_overflow_unsigned, /* complain_on_overflow */
1466 bfd_elf_generic_reloc, /* special_function */
1467 AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12), /* name */
1468 false, /* partial_inplace */
1469 0x3ffc00, /* src_mask */
1470 0x3ffc00, /* dst_mask */
1471 false), /* pcrel_offset */
1472
1473 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12, but no overflow check. */
1474 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12_NC), /* type */
1475 2, /* rightshift */
1476 2, /* size (0 = byte, 1 = short, 2 = long) */
1477 10, /* bitsize */
1478 false, /* pc_relative */
1479 10, /* bitpos */
1480 complain_overflow_dont, /* complain_on_overflow */
1481 bfd_elf_generic_reloc, /* special_function */
1482 AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12_NC), /* name */
1483 false, /* partial_inplace */
1484 0xffc00, /* src_mask */
1485 0xffc00, /* dst_mask */
1486 false), /* pcrel_offset */
1487
1488 /* LD/ST64: bit[11:3] of byte offset to module TLS base address. */
1489 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12), /* type */
1490 3, /* rightshift */
1491 2, /* size (0 = byte, 1 = short, 2 = long) */
1492 9, /* bitsize */
1493 false, /* pc_relative */
1494 10, /* bitpos */
1495 complain_overflow_unsigned, /* complain_on_overflow */
1496 bfd_elf_generic_reloc, /* special_function */
1497 AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12), /* name */
1498 false, /* partial_inplace */
1499 0x3ffc00, /* src_mask */
1500 0x3ffc00, /* dst_mask */
1501 false), /* pcrel_offset */
1502
1503 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12, but no overflow check. */
1504 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12_NC), /* type */
1505 3, /* rightshift */
1506 2, /* size (0 = byte, 1 = short, 2 = long) */
1507 9, /* bitsize */
1508 false, /* pc_relative */
1509 10, /* bitpos */
1510 complain_overflow_dont, /* complain_on_overflow */
1511 bfd_elf_generic_reloc, /* special_function */
1512 AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12_NC), /* name */
1513 false, /* partial_inplace */
1514 0x7fc00, /* src_mask */
1515 0x7fc00, /* dst_mask */
1516 false), /* pcrel_offset */
1517
1518 /* LD/ST8: bit[11:0] of byte offset to module TLS base address. */
1519 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12), /* type */
1520 0, /* rightshift */
1521 2, /* size (0 = byte, 1 = short, 2 = long) */
1522 12, /* bitsize */
1523 false, /* pc_relative */
1524 10, /* bitpos */
1525 complain_overflow_unsigned, /* complain_on_overflow */
1526 bfd_elf_generic_reloc, /* special_function */
1527 AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12), /* name */
1528 false, /* partial_inplace */
1529 0x3ffc00, /* src_mask */
1530 0x3ffc00, /* dst_mask */
1531 false), /* pcrel_offset */
1532
1533 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12, but no overflow check. */
1534 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12_NC), /* type */
1535 0, /* rightshift */
1536 2, /* size (0 = byte, 1 = short, 2 = long) */
1537 12, /* bitsize */
1538 false, /* pc_relative */
1539 10, /* bitpos */
1540 complain_overflow_dont, /* complain_on_overflow */
1541 bfd_elf_generic_reloc, /* special_function */
1542 AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12_NC), /* name */
1543 false, /* partial_inplace */
1544 0x3ffc00, /* src_mask */
1545 0x3ffc00, /* dst_mask */
1546 false), /* pcrel_offset */
1547
1548 /* MOVZ: bit[15:0] of byte offset to module TLS base address. */
1549 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0), /* type */
1550 0, /* rightshift */
1551 2, /* size (0 = byte, 1 = short, 2 = long) */
1552 16, /* bitsize */
1553 false, /* pc_relative */
1554 0, /* bitpos */
1555 complain_overflow_unsigned, /* complain_on_overflow */
1556 bfd_elf_generic_reloc, /* special_function */
1557 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0), /* name */
1558 false, /* partial_inplace */
1559 0xffff, /* src_mask */
1560 0xffff, /* dst_mask */
1561 false), /* pcrel_offset */
1562
1563 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0. */
1564 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0_NC), /* type */
1565 0, /* rightshift */
1566 2, /* size (0 = byte, 1 = short, 2 = long) */
1567 16, /* bitsize */
1568 false, /* pc_relative */
1569 0, /* bitpos */
1570 complain_overflow_dont, /* complain_on_overflow */
1571 bfd_elf_generic_reloc, /* special_function */
1572 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0_NC), /* name */
1573 false, /* partial_inplace */
1574 0xffff, /* src_mask */
1575 0xffff, /* dst_mask */
1576 false), /* pcrel_offset */
1577
1578 /* MOVZ: bit[31:16] of byte offset to module TLS base address. */
1579 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G1), /* type */
1580 16, /* rightshift */
1581 2, /* size (0 = byte, 1 = short, 2 = long) */
1582 16, /* bitsize */
1583 false, /* pc_relative */
1584 0, /* bitpos */
1585 complain_overflow_unsigned, /* complain_on_overflow */
1586 bfd_elf_generic_reloc, /* special_function */
1587 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1), /* name */
1588 false, /* partial_inplace */
1589 0xffff, /* src_mask */
1590 0xffff, /* dst_mask */
1591 false), /* pcrel_offset */
1592
1593 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1. */
1594 HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G1_NC), /* type */
1595 16, /* rightshift */
1596 2, /* size (0 = byte, 1 = short, 2 = long) */
1597 16, /* bitsize */
1598 false, /* pc_relative */
1599 0, /* bitpos */
1600 complain_overflow_dont, /* complain_on_overflow */
1601 bfd_elf_generic_reloc, /* special_function */
1602 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1_NC), /* name */
1603 false, /* partial_inplace */
1604 0xffff, /* src_mask */
1605 0xffff, /* dst_mask */
1606 false), /* pcrel_offset */
1607
1608 /* MOVZ: bit[47:32] of byte offset to module TLS base address. */
1609 HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G2), /* type */
1610 32, /* rightshift */
1611 2, /* size (0 = byte, 1 = short, 2 = long) */
1612 16, /* bitsize */
1613 false, /* pc_relative */
1614 0, /* bitpos */
1615 complain_overflow_unsigned, /* complain_on_overflow */
1616 bfd_elf_generic_reloc, /* special_function */
1617 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G2), /* name */
1618 false, /* partial_inplace */
1619 0xffff, /* src_mask */
1620 0xffff, /* dst_mask */
1621 false), /* pcrel_offset */
1622
1623 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */
1624 32, /* rightshift */
1625 2, /* size (0 = byte, 1 = short, 2 = long) */
1626 16, /* bitsize */
1627 false, /* pc_relative */
1628 0, /* bitpos */
1629 complain_overflow_unsigned, /* complain_on_overflow */
1630 bfd_elf_generic_reloc, /* special_function */
1631 AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */
1632 false, /* partial_inplace */
1633 0xffff, /* src_mask */
1634 0xffff, /* dst_mask */
1635 false), /* pcrel_offset */
1636
1637 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */
1638 16, /* rightshift */
1639 2, /* size (0 = byte, 1 = short, 2 = long) */
1640 16, /* bitsize */
1641 false, /* pc_relative */
1642 0, /* bitpos */
1643 complain_overflow_dont, /* complain_on_overflow */
1644 bfd_elf_generic_reloc, /* special_function */
1645 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */
1646 false, /* partial_inplace */
1647 0xffff, /* src_mask */
1648 0xffff, /* dst_mask */
1649 false), /* pcrel_offset */
1650
1651 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */
1652 16, /* rightshift */
1653 2, /* size (0 = byte, 1 = short, 2 = long) */
1654 16, /* bitsize */
1655 false, /* pc_relative */
1656 0, /* bitpos */
1657 complain_overflow_dont, /* complain_on_overflow */
1658 bfd_elf_generic_reloc, /* special_function */
1659 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */
1660 false, /* partial_inplace */
1661 0xffff, /* src_mask */
1662 0xffff, /* dst_mask */
1663 false), /* pcrel_offset */
1664
1665 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */
1666 0, /* rightshift */
1667 2, /* size (0 = byte, 1 = short, 2 = long) */
1668 16, /* bitsize */
1669 false, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_dont, /* complain_on_overflow */
1672 bfd_elf_generic_reloc, /* special_function */
1673 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */
1674 false, /* partial_inplace */
1675 0xffff, /* src_mask */
1676 0xffff, /* dst_mask */
1677 false), /* pcrel_offset */
1678
1679 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */
1680 0, /* rightshift */
1681 2, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 false, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 bfd_elf_generic_reloc, /* special_function */
1687 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */
1688 false, /* partial_inplace */
1689 0xffff, /* src_mask */
1690 0xffff, /* dst_mask */
1691 false), /* pcrel_offset */
1692
1693 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */
1694 12, /* rightshift */
1695 2, /* size (0 = byte, 1 = short, 2 = long) */
1696 12, /* bitsize */
1697 false, /* pc_relative */
1698 0, /* bitpos */
1699 complain_overflow_unsigned, /* complain_on_overflow */
1700 bfd_elf_generic_reloc, /* special_function */
1701 AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */
1702 false, /* partial_inplace */
1703 0xfff, /* src_mask */
1704 0xfff, /* dst_mask */
1705 false), /* pcrel_offset */
1706
1707 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */
1708 0, /* rightshift */
1709 2, /* size (0 = byte, 1 = short, 2 = long) */
1710 12, /* bitsize */
1711 false, /* pc_relative */
1712 0, /* bitpos */
1713 complain_overflow_unsigned, /* complain_on_overflow */
1714 bfd_elf_generic_reloc, /* special_function */
1715 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */
1716 false, /* partial_inplace */
1717 0xfff, /* src_mask */
1718 0xfff, /* dst_mask */
1719 false), /* pcrel_offset */
1720
1721 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */
1722 0, /* rightshift */
1723 2, /* size (0 = byte, 1 = short, 2 = long) */
1724 12, /* bitsize */
1725 false, /* pc_relative */
1726 0, /* bitpos */
1727 complain_overflow_dont, /* complain_on_overflow */
1728 bfd_elf_generic_reloc, /* special_function */
1729 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */
1730 false, /* partial_inplace */
1731 0xfff, /* src_mask */
1732 0xfff, /* dst_mask */
1733 false), /* pcrel_offset */
1734
1735 /* LD/ST16: bit[11:1] of byte offset to module TLS base address. */
1736 HOWTO (AARCH64_R (TLSLE_LDST16_TPREL_LO12), /* type */
1737 1, /* rightshift */
1738 2, /* size (0 = byte, 1 = short, 2 = long) */
1739 11, /* bitsize */
1740 false, /* pc_relative */
1741 10, /* bitpos */
1742 complain_overflow_unsigned, /* complain_on_overflow */
1743 bfd_elf_generic_reloc, /* special_function */
1744 AARCH64_R_STR (TLSLE_LDST16_TPREL_LO12), /* name */
1745 false, /* partial_inplace */
1746 0x1ffc00, /* src_mask */
1747 0x1ffc00, /* dst_mask */
1748 false), /* pcrel_offset */
1749
1750 /* Same as BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12, but no overflow check. */
1751 HOWTO (AARCH64_R (TLSLE_LDST16_TPREL_LO12_NC), /* type */
1752 1, /* rightshift */
1753 2, /* size (0 = byte, 1 = short, 2 = long) */
1754 11, /* bitsize */
1755 false, /* pc_relative */
1756 10, /* bitpos */
1757 complain_overflow_dont, /* complain_on_overflow */
1758 bfd_elf_generic_reloc, /* special_function */
1759 AARCH64_R_STR (TLSLE_LDST16_TPREL_LO12_NC), /* name */
1760 false, /* partial_inplace */
1761 0x1ffc00, /* src_mask */
1762 0x1ffc00, /* dst_mask */
1763 false), /* pcrel_offset */
1764
1765 /* LD/ST32: bit[11:2] of byte offset to module TLS base address. */
1766 HOWTO (AARCH64_R (TLSLE_LDST32_TPREL_LO12), /* type */
1767 2, /* rightshift */
1768 2, /* size (0 = byte, 1 = short, 2 = long) */
1769 10, /* bitsize */
1770 false, /* pc_relative */
1771 10, /* bitpos */
1772 complain_overflow_unsigned, /* complain_on_overflow */
1773 bfd_elf_generic_reloc, /* special_function */
1774 AARCH64_R_STR (TLSLE_LDST32_TPREL_LO12), /* name */
1775 false, /* partial_inplace */
1776 0xffc00, /* src_mask */
1777 0xffc00, /* dst_mask */
1778 false), /* pcrel_offset */
1779
1780 /* Same as BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12, but no overflow check. */
1781 HOWTO (AARCH64_R (TLSLE_LDST32_TPREL_LO12_NC), /* type */
1782 2, /* rightshift */
1783 2, /* size (0 = byte, 1 = short, 2 = long) */
1784 10, /* bitsize */
1785 false, /* pc_relative */
1786 10, /* bitpos */
1787 complain_overflow_dont, /* complain_on_overflow */
1788 bfd_elf_generic_reloc, /* special_function */
1789 AARCH64_R_STR (TLSLE_LDST32_TPREL_LO12_NC), /* name */
1790 false, /* partial_inplace */
1791 0xffc00, /* src_mask */
1792 0xffc00, /* dst_mask */
1793 false), /* pcrel_offset */
1794
1795 /* LD/ST64: bit[11:3] of byte offset to module TLS base address. */
1796 HOWTO (AARCH64_R (TLSLE_LDST64_TPREL_LO12), /* type */
1797 3, /* rightshift */
1798 2, /* size (0 = byte, 1 = short, 2 = long) */
1799 9, /* bitsize */
1800 false, /* pc_relative */
1801 10, /* bitpos */
1802 complain_overflow_unsigned, /* complain_on_overflow */
1803 bfd_elf_generic_reloc, /* special_function */
1804 AARCH64_R_STR (TLSLE_LDST64_TPREL_LO12), /* name */
1805 false, /* partial_inplace */
1806 0x7fc00, /* src_mask */
1807 0x7fc00, /* dst_mask */
1808 false), /* pcrel_offset */
1809
1810 /* Same as BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12, but no overflow check. */
1811 HOWTO (AARCH64_R (TLSLE_LDST64_TPREL_LO12_NC), /* type */
1812 3, /* rightshift */
1813 2, /* size (0 = byte, 1 = short, 2 = long) */
1814 9, /* bitsize */
1815 false, /* pc_relative */
1816 10, /* bitpos */
1817 complain_overflow_dont, /* complain_on_overflow */
1818 bfd_elf_generic_reloc, /* special_function */
1819 AARCH64_R_STR (TLSLE_LDST64_TPREL_LO12_NC), /* name */
1820 false, /* partial_inplace */
1821 0x7fc00, /* src_mask */
1822 0x7fc00, /* dst_mask */
1823 false), /* pcrel_offset */
1824
1825 /* LD/ST8: bit[11:0] of byte offset to module TLS base address. */
1826 HOWTO (AARCH64_R (TLSLE_LDST8_TPREL_LO12), /* type */
1827 0, /* rightshift */
1828 2, /* size (0 = byte, 1 = short, 2 = long) */
1829 12, /* bitsize */
1830 false, /* pc_relative */
1831 10, /* bitpos */
1832 complain_overflow_unsigned, /* complain_on_overflow */
1833 bfd_elf_generic_reloc, /* special_function */
1834 AARCH64_R_STR (TLSLE_LDST8_TPREL_LO12), /* name */
1835 false, /* partial_inplace */
1836 0x3ffc00, /* src_mask */
1837 0x3ffc00, /* dst_mask */
1838 false), /* pcrel_offset */
1839
1840 /* Same as BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12, but no overflow check. */
1841 HOWTO (AARCH64_R (TLSLE_LDST8_TPREL_LO12_NC), /* type */
1842 0, /* rightshift */
1843 2, /* size (0 = byte, 1 = short, 2 = long) */
1844 12, /* bitsize */
1845 false, /* pc_relative */
1846 10, /* bitpos */
1847 complain_overflow_dont, /* complain_on_overflow */
1848 bfd_elf_generic_reloc, /* special_function */
1849 AARCH64_R_STR (TLSLE_LDST8_TPREL_LO12_NC), /* name */
1850 false, /* partial_inplace */
1851 0x3ffc00, /* src_mask */
1852 0x3ffc00, /* dst_mask */
1853 false), /* pcrel_offset */
1854
1855 HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */
1856 2, /* rightshift */
1857 2, /* size (0 = byte, 1 = short, 2 = long) */
1858 19, /* bitsize */
1859 true, /* pc_relative */
1860 0, /* bitpos */
1861 complain_overflow_dont, /* complain_on_overflow */
1862 bfd_elf_generic_reloc, /* special_function */
1863 AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */
1864 false, /* partial_inplace */
1865 0x0ffffe0, /* src_mask */
1866 0x0ffffe0, /* dst_mask */
1867 true), /* pcrel_offset */
1868
1869 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */
1870 0, /* rightshift */
1871 2, /* size (0 = byte, 1 = short, 2 = long) */
1872 21, /* bitsize */
1873 true, /* pc_relative */
1874 0, /* bitpos */
1875 complain_overflow_dont, /* complain_on_overflow */
1876 bfd_elf_generic_reloc, /* special_function */
1877 AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */
1878 false, /* partial_inplace */
1879 0x1fffff, /* src_mask */
1880 0x1fffff, /* dst_mask */
1881 true), /* pcrel_offset */
1882
1883 /* Get to the page for the GOT entry for the symbol
1884 (G(S) - P) using an ADRP instruction. */
1885 HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */
1886 12, /* rightshift */
1887 2, /* size (0 = byte, 1 = short, 2 = long) */
1888 21, /* bitsize */
1889 true, /* pc_relative */
1890 0, /* bitpos */
1891 complain_overflow_dont, /* complain_on_overflow */
1892 bfd_elf_generic_reloc, /* special_function */
1893 AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */
1894 false, /* partial_inplace */
1895 0x1fffff, /* src_mask */
1896 0x1fffff, /* dst_mask */
1897 true), /* pcrel_offset */
1898
1899 /* LD64: GOT offset G(S) & 0xff8. */
1900 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12), /* type */
1901 3, /* rightshift */
1902 2, /* size (0 = byte, 1 = short, 2 = long) */
1903 12, /* bitsize */
1904 false, /* pc_relative */
1905 0, /* bitpos */
1906 complain_overflow_dont, /* complain_on_overflow */
1907 bfd_elf_generic_reloc, /* special_function */
1908 AARCH64_R_STR (TLSDESC_LD64_LO12), /* name */
1909 false, /* partial_inplace */
1910 0xff8, /* src_mask */
1911 0xff8, /* dst_mask */
1912 false), /* pcrel_offset */
1913
1914 /* LD32: GOT offset G(S) & 0xffc. */
1915 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */
1916 2, /* rightshift */
1917 2, /* size (0 = byte, 1 = short, 2 = long) */
1918 12, /* bitsize */
1919 false, /* pc_relative */
1920 0, /* bitpos */
1921 complain_overflow_dont, /* complain_on_overflow */
1922 bfd_elf_generic_reloc, /* special_function */
1923 AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */
1924 false, /* partial_inplace */
1925 0xffc, /* src_mask */
1926 0xffc, /* dst_mask */
1927 false), /* pcrel_offset */
1928
1929 /* ADD: GOT offset G(S) & 0xfff. */
1930 HOWTO (AARCH64_R (TLSDESC_ADD_LO12), /* type */
1931 0, /* rightshift */
1932 2, /* size (0 = byte, 1 = short, 2 = long) */
1933 12, /* bitsize */
1934 false, /* pc_relative */
1935 0, /* bitpos */
1936 complain_overflow_dont,/* complain_on_overflow */
1937 bfd_elf_generic_reloc, /* special_function */
1938 AARCH64_R_STR (TLSDESC_ADD_LO12), /* name */
1939 false, /* partial_inplace */
1940 0xfff, /* src_mask */
1941 0xfff, /* dst_mask */
1942 false), /* pcrel_offset */
1943
1944 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */
1945 16, /* rightshift */
1946 2, /* size (0 = byte, 1 = short, 2 = long) */
1947 12, /* bitsize */
1948 false, /* pc_relative */
1949 0, /* bitpos */
1950 complain_overflow_unsigned, /* complain_on_overflow */
1951 bfd_elf_generic_reloc, /* special_function */
1952 AARCH64_R_STR (TLSDESC_OFF_G1), /* name */
1953 false, /* partial_inplace */
1954 0xffff, /* src_mask */
1955 0xffff, /* dst_mask */
1956 false), /* pcrel_offset */
1957
1958 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */
1959 0, /* rightshift */
1960 2, /* size (0 = byte, 1 = short, 2 = long) */
1961 12, /* bitsize */
1962 false, /* pc_relative */
1963 0, /* bitpos */
1964 complain_overflow_dont, /* complain_on_overflow */
1965 bfd_elf_generic_reloc, /* special_function */
1966 AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */
1967 false, /* partial_inplace */
1968 0xffff, /* src_mask */
1969 0xffff, /* dst_mask */
1970 false), /* pcrel_offset */
1971
1972 HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */
1973 0, /* rightshift */
1974 2, /* size (0 = byte, 1 = short, 2 = long) */
1975 12, /* bitsize */
1976 false, /* pc_relative */
1977 0, /* bitpos */
1978 complain_overflow_dont, /* complain_on_overflow */
1979 bfd_elf_generic_reloc, /* special_function */
1980 AARCH64_R_STR (TLSDESC_LDR), /* name */
1981 false, /* partial_inplace */
1982 0x0, /* src_mask */
1983 0x0, /* dst_mask */
1984 false), /* pcrel_offset */
1985
1986 HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */
1987 0, /* rightshift */
1988 2, /* size (0 = byte, 1 = short, 2 = long) */
1989 12, /* bitsize */
1990 false, /* pc_relative */
1991 0, /* bitpos */
1992 complain_overflow_dont, /* complain_on_overflow */
1993 bfd_elf_generic_reloc, /* special_function */
1994 AARCH64_R_STR (TLSDESC_ADD), /* name */
1995 false, /* partial_inplace */
1996 0x0, /* src_mask */
1997 0x0, /* dst_mask */
1998 false), /* pcrel_offset */
1999
2000 HOWTO (AARCH64_R (TLSDESC_CALL), /* type */
2001 0, /* rightshift */
2002 2, /* size (0 = byte, 1 = short, 2 = long) */
2003 0, /* bitsize */
2004 false, /* pc_relative */
2005 0, /* bitpos */
2006 complain_overflow_dont, /* complain_on_overflow */
2007 bfd_elf_generic_reloc, /* special_function */
2008 AARCH64_R_STR (TLSDESC_CALL), /* name */
2009 false, /* partial_inplace */
2010 0x0, /* src_mask */
2011 0x0, /* dst_mask */
2012 false), /* pcrel_offset */
2013
2014 HOWTO (AARCH64_R (COPY), /* type */
2015 0, /* rightshift */
2016 2, /* size (0 = byte, 1 = short, 2 = long) */
2017 64, /* bitsize */
2018 false, /* pc_relative */
2019 0, /* bitpos */
2020 complain_overflow_bitfield, /* complain_on_overflow */
2021 bfd_elf_generic_reloc, /* special_function */
2022 AARCH64_R_STR (COPY), /* name */
2023 true, /* partial_inplace */
2024 0xffffffff, /* src_mask */
2025 0xffffffff, /* dst_mask */
2026 false), /* pcrel_offset */
2027
2028 HOWTO (AARCH64_R (GLOB_DAT), /* type */
2029 0, /* rightshift */
2030 2, /* size (0 = byte, 1 = short, 2 = long) */
2031 64, /* bitsize */
2032 false, /* pc_relative */
2033 0, /* bitpos */
2034 complain_overflow_bitfield, /* complain_on_overflow */
2035 bfd_elf_generic_reloc, /* special_function */
2036 AARCH64_R_STR (GLOB_DAT), /* name */
2037 true, /* partial_inplace */
2038 0xffffffff, /* src_mask */
2039 0xffffffff, /* dst_mask */
2040 false), /* pcrel_offset */
2041
2042 HOWTO (AARCH64_R (JUMP_SLOT), /* type */
2043 0, /* rightshift */
2044 2, /* size (0 = byte, 1 = short, 2 = long) */
2045 64, /* bitsize */
2046 false, /* pc_relative */
2047 0, /* bitpos */
2048 complain_overflow_bitfield, /* complain_on_overflow */
2049 bfd_elf_generic_reloc, /* special_function */
2050 AARCH64_R_STR (JUMP_SLOT), /* name */
2051 true, /* partial_inplace */
2052 0xffffffff, /* src_mask */
2053 0xffffffff, /* dst_mask */
2054 false), /* pcrel_offset */
2055
2056 HOWTO (AARCH64_R (RELATIVE), /* type */
2057 0, /* rightshift */
2058 2, /* size (0 = byte, 1 = short, 2 = long) */
2059 64, /* bitsize */
2060 false, /* pc_relative */
2061 0, /* bitpos */
2062 complain_overflow_bitfield, /* complain_on_overflow */
2063 bfd_elf_generic_reloc, /* special_function */
2064 AARCH64_R_STR (RELATIVE), /* name */
2065 true, /* partial_inplace */
2066 ALL_ONES, /* src_mask */
2067 ALL_ONES, /* dst_mask */
2068 false), /* pcrel_offset */
2069
2070 HOWTO (AARCH64_R (TLS_DTPMOD), /* type */
2071 0, /* rightshift */
2072 2, /* size (0 = byte, 1 = short, 2 = long) */
2073 64, /* bitsize */
2074 false, /* pc_relative */
2075 0, /* bitpos */
2076 complain_overflow_dont, /* complain_on_overflow */
2077 bfd_elf_generic_reloc, /* special_function */
2078 #if ARCH_SIZE == 64
2079 AARCH64_R_STR (TLS_DTPMOD64), /* name */
2080 #else
2081 AARCH64_R_STR (TLS_DTPMOD), /* name */
2082 #endif
2083 false, /* partial_inplace */
2084 0, /* src_mask */
2085 ALL_ONES, /* dst_mask */
2086 false), /* pc_reloffset */
2087
2088 HOWTO (AARCH64_R (TLS_DTPREL), /* type */
2089 0, /* rightshift */
2090 2, /* size (0 = byte, 1 = short, 2 = long) */
2091 64, /* bitsize */
2092 false, /* pc_relative */
2093 0, /* bitpos */
2094 complain_overflow_dont, /* complain_on_overflow */
2095 bfd_elf_generic_reloc, /* special_function */
2096 #if ARCH_SIZE == 64
2097 AARCH64_R_STR (TLS_DTPREL64), /* name */
2098 #else
2099 AARCH64_R_STR (TLS_DTPREL), /* name */
2100 #endif
2101 false, /* partial_inplace */
2102 0, /* src_mask */
2103 ALL_ONES, /* dst_mask */
2104 false), /* pcrel_offset */
2105
2106 HOWTO (AARCH64_R (TLS_TPREL), /* type */
2107 0, /* rightshift */
2108 2, /* size (0 = byte, 1 = short, 2 = long) */
2109 64, /* bitsize */
2110 false, /* pc_relative */
2111 0, /* bitpos */
2112 complain_overflow_dont, /* complain_on_overflow */
2113 bfd_elf_generic_reloc, /* special_function */
2114 #if ARCH_SIZE == 64
2115 AARCH64_R_STR (TLS_TPREL64), /* name */
2116 #else
2117 AARCH64_R_STR (TLS_TPREL), /* name */
2118 #endif
2119 false, /* partial_inplace */
2120 0, /* src_mask */
2121 ALL_ONES, /* dst_mask */
2122 false), /* pcrel_offset */
2123
2124 HOWTO (AARCH64_R (TLSDESC), /* type */
2125 0, /* rightshift */
2126 2, /* size (0 = byte, 1 = short, 2 = long) */
2127 64, /* bitsize */
2128 false, /* pc_relative */
2129 0, /* bitpos */
2130 complain_overflow_dont, /* complain_on_overflow */
2131 bfd_elf_generic_reloc, /* special_function */
2132 AARCH64_R_STR (TLSDESC), /* name */
2133 false, /* partial_inplace */
2134 0, /* src_mask */
2135 ALL_ONES, /* dst_mask */
2136 false), /* pcrel_offset */
2137
2138 HOWTO (AARCH64_R (IRELATIVE), /* type */
2139 0, /* rightshift */
2140 2, /* size (0 = byte, 1 = short, 2 = long) */
2141 64, /* bitsize */
2142 false, /* pc_relative */
2143 0, /* bitpos */
2144 complain_overflow_bitfield, /* complain_on_overflow */
2145 bfd_elf_generic_reloc, /* special_function */
2146 AARCH64_R_STR (IRELATIVE), /* name */
2147 false, /* partial_inplace */
2148 0, /* src_mask */
2149 ALL_ONES, /* dst_mask */
2150 false), /* pcrel_offset */
2151
2152 EMPTY_HOWTO (0),
2153 };
2154
2155 static reloc_howto_type elfNN_aarch64_howto_none =
2156 HOWTO (R_AARCH64_NONE, /* type */
2157 0, /* rightshift */
2158 3, /* size (0 = byte, 1 = short, 2 = long) */
2159 0, /* bitsize */
2160 false, /* pc_relative */
2161 0, /* bitpos */
2162 complain_overflow_dont,/* complain_on_overflow */
2163 bfd_elf_generic_reloc, /* special_function */
2164 "R_AARCH64_NONE", /* name */
2165 false, /* partial_inplace */
2166 0, /* src_mask */
2167 0, /* dst_mask */
2168 false); /* pcrel_offset */
2169
2170 /* Given HOWTO, return the bfd internal relocation enumerator. */
2171
2172 static bfd_reloc_code_real_type
2173 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto)
2174 {
2175 const int size
2176 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table);
2177 const ptrdiff_t offset
2178 = howto - elfNN_aarch64_howto_table;
2179
2180 if (offset > 0 && offset < size - 1)
2181 return BFD_RELOC_AARCH64_RELOC_START + offset;
2182
2183 if (howto == &elfNN_aarch64_howto_none)
2184 return BFD_RELOC_AARCH64_NONE;
2185
2186 return BFD_RELOC_AARCH64_RELOC_START;
2187 }
2188
2189 /* Given R_TYPE, return the bfd internal relocation enumerator. */
2190
2191 static bfd_reloc_code_real_type
2192 elfNN_aarch64_bfd_reloc_from_type (bfd *abfd, unsigned int r_type)
2193 {
2194 static bool initialized_p = false;
2195 /* Indexed by R_TYPE, values are offsets in the howto_table. */
2196 static unsigned int offsets[R_AARCH64_end];
2197
2198 if (!initialized_p)
2199 {
2200 unsigned int i;
2201
2202 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
2203 if (elfNN_aarch64_howto_table[i].type != 0)
2204 offsets[elfNN_aarch64_howto_table[i].type] = i;
2205
2206 initialized_p = true;
2207 }
2208
2209 if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL)
2210 return BFD_RELOC_AARCH64_NONE;
2211
2212 /* PR 17512: file: b371e70a. */
2213 if (r_type >= R_AARCH64_end)
2214 {
2215 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2216 abfd, r_type);
2217 bfd_set_error (bfd_error_bad_value);
2218 return BFD_RELOC_AARCH64_NONE;
2219 }
2220
2221 return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type];
2222 }
2223
2224 struct elf_aarch64_reloc_map
2225 {
2226 bfd_reloc_code_real_type from;
2227 bfd_reloc_code_real_type to;
2228 };
2229
2230 /* Map bfd generic reloc to AArch64-specific reloc. */
2231 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] =
2232 {
2233 {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE},
2234
2235 /* Basic data relocations. */
2236 {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN},
2237 {BFD_RELOC_64, BFD_RELOC_AARCH64_64},
2238 {BFD_RELOC_32, BFD_RELOC_AARCH64_32},
2239 {BFD_RELOC_16, BFD_RELOC_AARCH64_16},
2240 {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL},
2241 {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL},
2242 {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL},
2243 };
2244
2245 /* Given the bfd internal relocation enumerator in CODE, return the
2246 corresponding howto entry. */
2247
2248 static reloc_howto_type *
2249 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code)
2250 {
2251 unsigned int i;
2252
2253 /* Convert bfd generic reloc to AArch64-specific reloc. */
2254 if (code < BFD_RELOC_AARCH64_RELOC_START
2255 || code > BFD_RELOC_AARCH64_RELOC_END)
2256 for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++)
2257 if (elf_aarch64_reloc_map[i].from == code)
2258 {
2259 code = elf_aarch64_reloc_map[i].to;
2260 break;
2261 }
2262
2263 if (code > BFD_RELOC_AARCH64_RELOC_START
2264 && code < BFD_RELOC_AARCH64_RELOC_END)
2265 if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type)
2266 return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START];
2267
2268 if (code == BFD_RELOC_AARCH64_NONE)
2269 return &elfNN_aarch64_howto_none;
2270
2271 return NULL;
2272 }
2273
2274 static reloc_howto_type *
2275 elfNN_aarch64_howto_from_type (bfd *abfd, unsigned int r_type)
2276 {
2277 bfd_reloc_code_real_type val;
2278 reloc_howto_type *howto;
2279
2280 #if ARCH_SIZE == 32
2281 if (r_type > 256)
2282 {
2283 bfd_set_error (bfd_error_bad_value);
2284 return NULL;
2285 }
2286 #endif
2287
2288 if (r_type == R_AARCH64_NONE)
2289 return &elfNN_aarch64_howto_none;
2290
2291 val = elfNN_aarch64_bfd_reloc_from_type (abfd, r_type);
2292 howto = elfNN_aarch64_howto_from_bfd_reloc (val);
2293
2294 if (howto != NULL)
2295 return howto;
2296
2297 bfd_set_error (bfd_error_bad_value);
2298 return NULL;
2299 }
2300
2301 static bool
2302 elfNN_aarch64_info_to_howto (bfd *abfd, arelent *bfd_reloc,
2303 Elf_Internal_Rela *elf_reloc)
2304 {
2305 unsigned int r_type;
2306
2307 r_type = ELFNN_R_TYPE (elf_reloc->r_info);
2308 bfd_reloc->howto = elfNN_aarch64_howto_from_type (abfd, r_type);
2309
2310 if (bfd_reloc->howto == NULL)
2311 {
2312 /* xgettext:c-format */
2313 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, r_type);
2314 return false;
2315 }
2316 return true;
2317 }
2318
2319 static reloc_howto_type *
2320 elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2321 bfd_reloc_code_real_type code)
2322 {
2323 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code);
2324
2325 if (howto != NULL)
2326 return howto;
2327
2328 bfd_set_error (bfd_error_bad_value);
2329 return NULL;
2330 }
2331
2332 static reloc_howto_type *
2333 elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2334 const char *r_name)
2335 {
2336 unsigned int i;
2337
2338 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
2339 if (elfNN_aarch64_howto_table[i].name != NULL
2340 && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0)
2341 return &elfNN_aarch64_howto_table[i];
2342
2343 return NULL;
2344 }
2345
2346 #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec
2347 #define TARGET_LITTLE_NAME "elfNN-littleaarch64"
2348 #define TARGET_BIG_SYM aarch64_elfNN_be_vec
2349 #define TARGET_BIG_NAME "elfNN-bigaarch64"
2350
2351 /* The linker script knows the section names for placement.
2352 The entry_names are used to do simple name mangling on the stubs.
2353 Given a function name, and its type, the stub can be found. The
2354 name can be changed. The only requirement is the %s be present. */
2355 #define STUB_ENTRY_NAME "__%s_veneer"
2356
2357 /* The name of the dynamic interpreter. This is put in the .interp
2358 section. */
2359 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
2360
2361 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
2362 (((1 << 25) - 1) << 2)
2363 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
2364 (-((1 << 25) << 2))
2365
2366 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
2367 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
2368
2369 static int
2370 aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place)
2371 {
2372 bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12;
2373 return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM;
2374 }
2375
2376 static int
2377 aarch64_valid_branch_p (bfd_vma value, bfd_vma place)
2378 {
2379 bfd_signed_vma offset = (bfd_signed_vma) (value - place);
2380 return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET
2381 && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET);
2382 }
2383
2384 static const uint32_t aarch64_adrp_branch_stub [] =
2385 {
2386 0x90000010, /* adrp ip0, X */
2387 /* R_AARCH64_ADR_HI21_PCREL(X) */
2388 0x91000210, /* add ip0, ip0, :lo12:X */
2389 /* R_AARCH64_ADD_ABS_LO12_NC(X) */
2390 0xd61f0200, /* br ip0 */
2391 };
2392
2393 static const uint32_t aarch64_long_branch_stub[] =
2394 {
2395 #if ARCH_SIZE == 64
2396 0x58000090, /* ldr ip0, 1f */
2397 #else
2398 0x18000090, /* ldr wip0, 1f */
2399 #endif
2400 0x10000011, /* adr ip1, #0 */
2401 0x8b110210, /* add ip0, ip0, ip1 */
2402 0xd61f0200, /* br ip0 */
2403 0x00000000, /* 1: .xword or .word
2404 R_AARCH64_PRELNN(X) + 12
2405 */
2406 0x00000000,
2407 };
2408
2409 static const uint32_t aarch64_erratum_835769_stub[] =
2410 {
2411 0x00000000, /* Placeholder for multiply accumulate. */
2412 0x14000000, /* b <label> */
2413 };
2414
2415 static const uint32_t aarch64_erratum_843419_stub[] =
2416 {
2417 0x00000000, /* Placeholder for LDR instruction. */
2418 0x14000000, /* b <label> */
2419 };
2420
2421 /* Section name for stubs is the associated section name plus this
2422 string. */
2423 #define STUB_SUFFIX ".stub"
2424
2425 enum elf_aarch64_stub_type
2426 {
2427 aarch64_stub_none,
2428 aarch64_stub_adrp_branch,
2429 aarch64_stub_long_branch,
2430 aarch64_stub_erratum_835769_veneer,
2431 aarch64_stub_erratum_843419_veneer,
2432 };
2433
2434 struct elf_aarch64_stub_hash_entry
2435 {
2436 /* Base hash table entry structure. */
2437 struct bfd_hash_entry root;
2438
2439 /* The stub section. */
2440 asection *stub_sec;
2441
2442 /* Offset within stub_sec of the beginning of this stub. */
2443 bfd_vma stub_offset;
2444
2445 /* Given the symbol's value and its section we can determine its final
2446 value when building the stubs (so the stub knows where to jump). */
2447 bfd_vma target_value;
2448 asection *target_section;
2449
2450 enum elf_aarch64_stub_type stub_type;
2451
2452 /* The symbol table entry, if any, that this was derived from. */
2453 struct elf_aarch64_link_hash_entry *h;
2454
2455 /* Destination symbol type */
2456 unsigned char st_type;
2457
2458 /* Where this stub is being called from, or, in the case of combined
2459 stub sections, the first input section in the group. */
2460 asection *id_sec;
2461
2462 /* The name for the local symbol at the start of this stub. The
2463 stub name in the hash table has to be unique; this does not, so
2464 it can be friendlier. */
2465 char *output_name;
2466
2467 /* The instruction which caused this stub to be generated (only valid for
2468 erratum 835769 workaround stubs at present). */
2469 uint32_t veneered_insn;
2470
2471 /* In an erratum 843419 workaround stub, the ADRP instruction offset. */
2472 bfd_vma adrp_offset;
2473 };
2474
2475 /* Used to build a map of a section. This is required for mixed-endian
2476 code/data. */
2477
2478 typedef struct elf_elf_section_map
2479 {
2480 bfd_vma vma;
2481 char type;
2482 }
2483 elf_aarch64_section_map;
2484
2485
2486 typedef struct _aarch64_elf_section_data
2487 {
2488 struct bfd_elf_section_data elf;
2489 unsigned int mapcount;
2490 unsigned int mapsize;
2491 elf_aarch64_section_map *map;
2492 }
2493 _aarch64_elf_section_data;
2494
2495 #define elf_aarch64_section_data(sec) \
2496 ((_aarch64_elf_section_data *) elf_section_data (sec))
2497
2498 /* The size of the thread control block which is defined to be two pointers. */
2499 #define TCB_SIZE (ARCH_SIZE/8)*2
2500
2501 struct elf_aarch64_local_symbol
2502 {
2503 unsigned int got_type;
2504 bfd_signed_vma got_refcount;
2505 bfd_vma got_offset;
2506
2507 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
2508 offset is from the end of the jump table and reserved entries
2509 within the PLTGOT.
2510
2511 The magic value (bfd_vma) -1 indicates that an offset has not be
2512 allocated. */
2513 bfd_vma tlsdesc_got_jump_table_offset;
2514 };
2515
2516 struct elf_aarch64_obj_tdata
2517 {
2518 struct elf_obj_tdata root;
2519
2520 /* local symbol descriptors */
2521 struct elf_aarch64_local_symbol *locals;
2522
2523 /* Zero to warn when linking objects with incompatible enum sizes. */
2524 int no_enum_size_warning;
2525
2526 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2527 int no_wchar_size_warning;
2528
2529 /* All GNU_PROPERTY_AARCH64_FEATURE_1_AND properties. */
2530 uint32_t gnu_and_prop;
2531
2532 /* Zero to warn when linking objects with incompatible
2533 GNU_PROPERTY_AARCH64_FEATURE_1_BTI. */
2534 int no_bti_warn;
2535
2536 /* PLT type based on security. */
2537 aarch64_plt_type plt_type;
2538 };
2539
2540 #define elf_aarch64_tdata(bfd) \
2541 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
2542
2543 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
2544
2545 #define is_aarch64_elf(bfd) \
2546 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2547 && elf_tdata (bfd) != NULL \
2548 && elf_object_id (bfd) == AARCH64_ELF_DATA)
2549
2550 static bool
2551 elfNN_aarch64_mkobject (bfd *abfd)
2552 {
2553 return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata),
2554 AARCH64_ELF_DATA);
2555 }
2556
2557 #define elf_aarch64_hash_entry(ent) \
2558 ((struct elf_aarch64_link_hash_entry *)(ent))
2559
2560 #define GOT_UNKNOWN 0
2561 #define GOT_NORMAL 1
2562 #define GOT_TLS_GD 2
2563 #define GOT_TLS_IE 4
2564 #define GOT_TLSDESC_GD 8
2565
2566 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
2567
2568 /* AArch64 ELF linker hash entry. */
2569 struct elf_aarch64_link_hash_entry
2570 {
2571 struct elf_link_hash_entry root;
2572
2573 /* Since PLT entries have variable size, we need to record the
2574 index into .got.plt instead of recomputing it from the PLT
2575 offset. */
2576 bfd_signed_vma plt_got_offset;
2577
2578 /* Bit mask representing the type of GOT entry(s) if any required by
2579 this symbol. */
2580 unsigned int got_type;
2581
2582 /* A pointer to the most recently used stub hash entry against this
2583 symbol. */
2584 struct elf_aarch64_stub_hash_entry *stub_cache;
2585
2586 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
2587 is from the end of the jump table and reserved entries within the PLTGOT.
2588
2589 The magic value (bfd_vma) -1 indicates that an offset has not
2590 be allocated. */
2591 bfd_vma tlsdesc_got_jump_table_offset;
2592 };
2593
2594 static unsigned int
2595 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h,
2596 bfd *abfd,
2597 unsigned long r_symndx)
2598 {
2599 if (h)
2600 return elf_aarch64_hash_entry (h)->got_type;
2601
2602 if (! elf_aarch64_locals (abfd))
2603 return GOT_UNKNOWN;
2604
2605 return elf_aarch64_locals (abfd)[r_symndx].got_type;
2606 }
2607
2608 /* Get the AArch64 elf linker hash table from a link_info structure. */
2609 #define elf_aarch64_hash_table(info) \
2610 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
2611
2612 #define aarch64_stub_hash_lookup(table, string, create, copy) \
2613 ((struct elf_aarch64_stub_hash_entry *) \
2614 bfd_hash_lookup ((table), (string), (create), (copy)))
2615
2616 /* AArch64 ELF linker hash table. */
2617 struct elf_aarch64_link_hash_table
2618 {
2619 /* The main hash table. */
2620 struct elf_link_hash_table root;
2621
2622 /* Nonzero to force PIC branch veneers. */
2623 int pic_veneer;
2624
2625 /* Fix erratum 835769. */
2626 int fix_erratum_835769;
2627
2628 /* Fix erratum 843419. */
2629 erratum_84319_opts fix_erratum_843419;
2630
2631 /* Don't apply link-time values for dynamic relocations. */
2632 int no_apply_dynamic_relocs;
2633
2634 /* The number of bytes in the initial entry in the PLT. */
2635 bfd_size_type plt_header_size;
2636
2637 /* The bytes of the initial PLT entry. */
2638 const bfd_byte *plt0_entry;
2639
2640 /* The number of bytes in the subsequent PLT entries. */
2641 bfd_size_type plt_entry_size;
2642
2643 /* The bytes of the subsequent PLT entry. */
2644 const bfd_byte *plt_entry;
2645
2646 /* For convenience in allocate_dynrelocs. */
2647 bfd *obfd;
2648
2649 /* The amount of space used by the reserved portion of the sgotplt
2650 section, plus whatever space is used by the jump slots. */
2651 bfd_vma sgotplt_jump_table_size;
2652
2653 /* The stub hash table. */
2654 struct bfd_hash_table stub_hash_table;
2655
2656 /* Linker stub bfd. */
2657 bfd *stub_bfd;
2658
2659 /* Linker call-backs. */
2660 asection *(*add_stub_section) (const char *, asection *);
2661 void (*layout_sections_again) (void);
2662
2663 /* Array to keep track of which stub sections have been created, and
2664 information on stub grouping. */
2665 struct map_stub
2666 {
2667 /* This is the section to which stubs in the group will be
2668 attached. */
2669 asection *link_sec;
2670 /* The stub section. */
2671 asection *stub_sec;
2672 } *stub_group;
2673
2674 /* Assorted information used by elfNN_aarch64_size_stubs. */
2675 unsigned int bfd_count;
2676 unsigned int top_index;
2677 asection **input_list;
2678
2679 /* JUMP_SLOT relocs for variant PCS symbols may be present. */
2680 int variant_pcs;
2681
2682 /* The number of bytes in the PLT enty for the TLS descriptor. */
2683 bfd_size_type tlsdesc_plt_entry_size;
2684
2685 /* Used by local STT_GNU_IFUNC symbols. */
2686 htab_t loc_hash_table;
2687 void * loc_hash_memory;
2688 };
2689
2690 /* Create an entry in an AArch64 ELF linker hash table. */
2691
2692 static struct bfd_hash_entry *
2693 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry,
2694 struct bfd_hash_table *table,
2695 const char *string)
2696 {
2697 struct elf_aarch64_link_hash_entry *ret =
2698 (struct elf_aarch64_link_hash_entry *) entry;
2699
2700 /* Allocate the structure if it has not already been allocated by a
2701 subclass. */
2702 if (ret == NULL)
2703 ret = bfd_hash_allocate (table,
2704 sizeof (struct elf_aarch64_link_hash_entry));
2705 if (ret == NULL)
2706 return (struct bfd_hash_entry *) ret;
2707
2708 /* Call the allocation method of the superclass. */
2709 ret = ((struct elf_aarch64_link_hash_entry *)
2710 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2711 table, string));
2712 if (ret != NULL)
2713 {
2714 ret->got_type = GOT_UNKNOWN;
2715 ret->plt_got_offset = (bfd_vma) - 1;
2716 ret->stub_cache = NULL;
2717 ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
2718 }
2719
2720 return (struct bfd_hash_entry *) ret;
2721 }
2722
2723 /* Initialize an entry in the stub hash table. */
2724
2725 static struct bfd_hash_entry *
2726 stub_hash_newfunc (struct bfd_hash_entry *entry,
2727 struct bfd_hash_table *table, const char *string)
2728 {
2729 /* Allocate the structure if it has not already been allocated by a
2730 subclass. */
2731 if (entry == NULL)
2732 {
2733 entry = bfd_hash_allocate (table,
2734 sizeof (struct
2735 elf_aarch64_stub_hash_entry));
2736 if (entry == NULL)
2737 return entry;
2738 }
2739
2740 /* Call the allocation method of the superclass. */
2741 entry = bfd_hash_newfunc (entry, table, string);
2742 if (entry != NULL)
2743 {
2744 struct elf_aarch64_stub_hash_entry *eh;
2745
2746 /* Initialize the local fields. */
2747 eh = (struct elf_aarch64_stub_hash_entry *) entry;
2748 eh->adrp_offset = 0;
2749 eh->stub_sec = NULL;
2750 eh->stub_offset = 0;
2751 eh->target_value = 0;
2752 eh->target_section = NULL;
2753 eh->stub_type = aarch64_stub_none;
2754 eh->h = NULL;
2755 eh->id_sec = NULL;
2756 }
2757
2758 return entry;
2759 }
2760
2761 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
2762 for local symbol so that we can handle local STT_GNU_IFUNC symbols
2763 as global symbol. We reuse indx and dynstr_index for local symbol
2764 hash since they aren't used by global symbols in this backend. */
2765
2766 static hashval_t
2767 elfNN_aarch64_local_htab_hash (const void *ptr)
2768 {
2769 struct elf_link_hash_entry *h
2770 = (struct elf_link_hash_entry *) ptr;
2771 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
2772 }
2773
2774 /* Compare local hash entries. */
2775
2776 static int
2777 elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2)
2778 {
2779 struct elf_link_hash_entry *h1
2780 = (struct elf_link_hash_entry *) ptr1;
2781 struct elf_link_hash_entry *h2
2782 = (struct elf_link_hash_entry *) ptr2;
2783
2784 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
2785 }
2786
2787 /* Find and/or create a hash entry for local symbol. */
2788
2789 static struct elf_link_hash_entry *
2790 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab,
2791 bfd *abfd, const Elf_Internal_Rela *rel,
2792 bool create)
2793 {
2794 struct elf_aarch64_link_hash_entry e, *ret;
2795 asection *sec = abfd->sections;
2796 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
2797 ELFNN_R_SYM (rel->r_info));
2798 void **slot;
2799
2800 e.root.indx = sec->id;
2801 e.root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2802 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
2803 create ? INSERT : NO_INSERT);
2804
2805 if (!slot)
2806 return NULL;
2807
2808 if (*slot)
2809 {
2810 ret = (struct elf_aarch64_link_hash_entry *) *slot;
2811 return &ret->root;
2812 }
2813
2814 ret = (struct elf_aarch64_link_hash_entry *)
2815 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
2816 sizeof (struct elf_aarch64_link_hash_entry));
2817 if (ret)
2818 {
2819 memset (ret, 0, sizeof (*ret));
2820 ret->root.indx = sec->id;
2821 ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2822 ret->root.dynindx = -1;
2823 *slot = ret;
2824 }
2825 return &ret->root;
2826 }
2827
2828 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2829
2830 static void
2831 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info,
2832 struct elf_link_hash_entry *dir,
2833 struct elf_link_hash_entry *ind)
2834 {
2835 struct elf_aarch64_link_hash_entry *edir, *eind;
2836
2837 edir = (struct elf_aarch64_link_hash_entry *) dir;
2838 eind = (struct elf_aarch64_link_hash_entry *) ind;
2839
2840 if (ind->root.type == bfd_link_hash_indirect)
2841 {
2842 /* Copy over PLT info. */
2843 if (dir->got.refcount <= 0)
2844 {
2845 edir->got_type = eind->got_type;
2846 eind->got_type = GOT_UNKNOWN;
2847 }
2848 }
2849
2850 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2851 }
2852
2853 /* Merge non-visibility st_other attributes. */
2854
2855 static void
2856 elfNN_aarch64_merge_symbol_attribute (struct elf_link_hash_entry *h,
2857 unsigned int st_other,
2858 bool definition ATTRIBUTE_UNUSED,
2859 bool dynamic ATTRIBUTE_UNUSED)
2860 {
2861 unsigned int isym_sto = st_other & ~ELF_ST_VISIBILITY (-1);
2862 unsigned int h_sto = h->other & ~ELF_ST_VISIBILITY (-1);
2863
2864 if (isym_sto == h_sto)
2865 return;
2866
2867 if (isym_sto & ~STO_AARCH64_VARIANT_PCS)
2868 /* Not fatal, this callback cannot fail. */
2869 _bfd_error_handler (_("unknown attribute for symbol `%s': 0x%02x"),
2870 h->root.root.string, isym_sto);
2871
2872 /* Note: Ideally we would warn about any attribute mismatch, but
2873 this api does not allow that without substantial changes. */
2874 if (isym_sto & STO_AARCH64_VARIANT_PCS)
2875 h->other |= STO_AARCH64_VARIANT_PCS;
2876 }
2877
2878 /* Destroy an AArch64 elf linker hash table. */
2879
2880 static void
2881 elfNN_aarch64_link_hash_table_free (bfd *obfd)
2882 {
2883 struct elf_aarch64_link_hash_table *ret
2884 = (struct elf_aarch64_link_hash_table *) obfd->link.hash;
2885
2886 if (ret->loc_hash_table)
2887 htab_delete (ret->loc_hash_table);
2888 if (ret->loc_hash_memory)
2889 objalloc_free ((struct objalloc *) ret->loc_hash_memory);
2890
2891 bfd_hash_table_free (&ret->stub_hash_table);
2892 _bfd_elf_link_hash_table_free (obfd);
2893 }
2894
2895 /* Create an AArch64 elf linker hash table. */
2896
2897 static struct bfd_link_hash_table *
2898 elfNN_aarch64_link_hash_table_create (bfd *abfd)
2899 {
2900 struct elf_aarch64_link_hash_table *ret;
2901 size_t amt = sizeof (struct elf_aarch64_link_hash_table);
2902
2903 ret = bfd_zmalloc (amt);
2904 if (ret == NULL)
2905 return NULL;
2906
2907 if (!_bfd_elf_link_hash_table_init
2908 (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc,
2909 sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA))
2910 {
2911 free (ret);
2912 return NULL;
2913 }
2914
2915 ret->plt_header_size = PLT_ENTRY_SIZE;
2916 ret->plt0_entry = elfNN_aarch64_small_plt0_entry;
2917 ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE;
2918 ret->plt_entry = elfNN_aarch64_small_plt_entry;
2919 ret->tlsdesc_plt_entry_size = PLT_TLSDESC_ENTRY_SIZE;
2920 ret->obfd = abfd;
2921 ret->root.tlsdesc_got = (bfd_vma) - 1;
2922
2923 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2924 sizeof (struct elf_aarch64_stub_hash_entry)))
2925 {
2926 _bfd_elf_link_hash_table_free (abfd);
2927 return NULL;
2928 }
2929
2930 ret->loc_hash_table = htab_try_create (1024,
2931 elfNN_aarch64_local_htab_hash,
2932 elfNN_aarch64_local_htab_eq,
2933 NULL);
2934 ret->loc_hash_memory = objalloc_create ();
2935 if (!ret->loc_hash_table || !ret->loc_hash_memory)
2936 {
2937 elfNN_aarch64_link_hash_table_free (abfd);
2938 return NULL;
2939 }
2940 ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free;
2941
2942 return &ret->root.root;
2943 }
2944
2945 /* Perform relocation R_TYPE. Returns TRUE upon success, FALSE otherwise. */
2946
2947 static bool
2948 aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section,
2949 bfd_vma offset, bfd_vma value)
2950 {
2951 reloc_howto_type *howto;
2952 bfd_vma place;
2953
2954 howto = elfNN_aarch64_howto_from_type (input_bfd, r_type);
2955 place = (input_section->output_section->vma + input_section->output_offset
2956 + offset);
2957
2958 r_type = elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type);
2959 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, r_type, place,
2960 value, 0, false);
2961 return _bfd_aarch64_elf_put_addend (input_bfd,
2962 input_section->contents + offset, r_type,
2963 howto, value) == bfd_reloc_ok;
2964 }
2965
2966 static enum elf_aarch64_stub_type
2967 aarch64_select_branch_stub (bfd_vma value, bfd_vma place)
2968 {
2969 if (aarch64_valid_for_adrp_p (value, place))
2970 return aarch64_stub_adrp_branch;
2971 return aarch64_stub_long_branch;
2972 }
2973
2974 /* Determine the type of stub needed, if any, for a call. */
2975
2976 static enum elf_aarch64_stub_type
2977 aarch64_type_of_stub (asection *input_sec,
2978 const Elf_Internal_Rela *rel,
2979 asection *sym_sec,
2980 unsigned char st_type,
2981 bfd_vma destination)
2982 {
2983 bfd_vma location;
2984 bfd_signed_vma branch_offset;
2985 unsigned int r_type;
2986 enum elf_aarch64_stub_type stub_type = aarch64_stub_none;
2987
2988 if (st_type != STT_FUNC
2989 && (sym_sec == input_sec))
2990 return stub_type;
2991
2992 /* Determine where the call point is. */
2993 location = (input_sec->output_offset
2994 + input_sec->output_section->vma + rel->r_offset);
2995
2996 branch_offset = (bfd_signed_vma) (destination - location);
2997
2998 r_type = ELFNN_R_TYPE (rel->r_info);
2999
3000 /* We don't want to redirect any old unconditional jump in this way,
3001 only one which is being used for a sibcall, where it is
3002 acceptable for the IP0 and IP1 registers to be clobbered. */
3003 if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26))
3004 && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET
3005 || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET))
3006 {
3007 stub_type = aarch64_stub_long_branch;
3008 }
3009
3010 return stub_type;
3011 }
3012
3013 /* Build a name for an entry in the stub hash table. */
3014
3015 static char *
3016 elfNN_aarch64_stub_name (const asection *input_section,
3017 const asection *sym_sec,
3018 const struct elf_aarch64_link_hash_entry *hash,
3019 const Elf_Internal_Rela *rel)
3020 {
3021 char *stub_name;
3022 bfd_size_type len;
3023
3024 if (hash)
3025 {
3026 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1;
3027 stub_name = bfd_malloc (len);
3028 if (stub_name != NULL)
3029 snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x",
3030 (unsigned int) input_section->id,
3031 hash->root.root.root.string,
3032 rel->r_addend);
3033 }
3034 else
3035 {
3036 len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
3037 stub_name = bfd_malloc (len);
3038 if (stub_name != NULL)
3039 snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x",
3040 (unsigned int) input_section->id,
3041 (unsigned int) sym_sec->id,
3042 (unsigned int) ELFNN_R_SYM (rel->r_info),
3043 rel->r_addend);
3044 }
3045
3046 return stub_name;
3047 }
3048
3049 /* Return TRUE if symbol H should be hashed in the `.gnu.hash' section. For
3050 executable PLT slots where the executable never takes the address of those
3051 functions, the function symbols are not added to the hash table. */
3052
3053 static bool
3054 elf_aarch64_hash_symbol (struct elf_link_hash_entry *h)
3055 {
3056 if (h->plt.offset != (bfd_vma) -1
3057 && !h->def_regular
3058 && !h->pointer_equality_needed)
3059 return false;
3060
3061 return _bfd_elf_hash_symbol (h);
3062 }
3063
3064
3065 /* Look up an entry in the stub hash. Stub entries are cached because
3066 creating the stub name takes a bit of time. */
3067
3068 static struct elf_aarch64_stub_hash_entry *
3069 elfNN_aarch64_get_stub_entry (const asection *input_section,
3070 const asection *sym_sec,
3071 struct elf_link_hash_entry *hash,
3072 const Elf_Internal_Rela *rel,
3073 struct elf_aarch64_link_hash_table *htab)
3074 {
3075 struct elf_aarch64_stub_hash_entry *stub_entry;
3076 struct elf_aarch64_link_hash_entry *h =
3077 (struct elf_aarch64_link_hash_entry *) hash;
3078 const asection *id_sec;
3079
3080 if ((input_section->flags & SEC_CODE) == 0)
3081 return NULL;
3082
3083 /* If this input section is part of a group of sections sharing one
3084 stub section, then use the id of the first section in the group.
3085 Stub names need to include a section id, as there may well be
3086 more than one stub used to reach say, printf, and we need to
3087 distinguish between them. */
3088 id_sec = htab->stub_group[input_section->id].link_sec;
3089
3090 if (h != NULL && h->stub_cache != NULL
3091 && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec)
3092 {
3093 stub_entry = h->stub_cache;
3094 }
3095 else
3096 {
3097 char *stub_name;
3098
3099 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel);
3100 if (stub_name == NULL)
3101 return NULL;
3102
3103 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
3104 stub_name, false, false);
3105 if (h != NULL)
3106 h->stub_cache = stub_entry;
3107
3108 free (stub_name);
3109 }
3110
3111 return stub_entry;
3112 }
3113
3114
3115 /* Create a stub section. */
3116
3117 static asection *
3118 _bfd_aarch64_create_stub_section (asection *section,
3119 struct elf_aarch64_link_hash_table *htab)
3120 {
3121 size_t namelen;
3122 bfd_size_type len;
3123 char *s_name;
3124
3125 namelen = strlen (section->name);
3126 len = namelen + sizeof (STUB_SUFFIX);
3127 s_name = bfd_alloc (htab->stub_bfd, len);
3128 if (s_name == NULL)
3129 return NULL;
3130
3131 memcpy (s_name, section->name, namelen);
3132 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3133 return (*htab->add_stub_section) (s_name, section);
3134 }
3135
3136
3137 /* Find or create a stub section for a link section.
3138
3139 Fix or create the stub section used to collect stubs attached to
3140 the specified link section. */
3141
3142 static asection *
3143 _bfd_aarch64_get_stub_for_link_section (asection *link_section,
3144 struct elf_aarch64_link_hash_table *htab)
3145 {
3146 if (htab->stub_group[link_section->id].stub_sec == NULL)
3147 htab->stub_group[link_section->id].stub_sec
3148 = _bfd_aarch64_create_stub_section (link_section, htab);
3149 return htab->stub_group[link_section->id].stub_sec;
3150 }
3151
3152
3153 /* Find or create a stub section in the stub group for an input
3154 section. */
3155
3156 static asection *
3157 _bfd_aarch64_create_or_find_stub_sec (asection *section,
3158 struct elf_aarch64_link_hash_table *htab)
3159 {
3160 asection *link_sec = htab->stub_group[section->id].link_sec;
3161 return _bfd_aarch64_get_stub_for_link_section (link_sec, htab);
3162 }
3163
3164
3165 /* Add a new stub entry in the stub group associated with an input
3166 section to the stub hash. Not all fields of the new stub entry are
3167 initialised. */
3168
3169 static struct elf_aarch64_stub_hash_entry *
3170 _bfd_aarch64_add_stub_entry_in_group (const char *stub_name,
3171 asection *section,
3172 struct elf_aarch64_link_hash_table *htab)
3173 {
3174 asection *link_sec;
3175 asection *stub_sec;
3176 struct elf_aarch64_stub_hash_entry *stub_entry;
3177
3178 link_sec = htab->stub_group[section->id].link_sec;
3179 stub_sec = _bfd_aarch64_create_or_find_stub_sec (section, htab);
3180
3181 /* Enter this entry into the linker stub hash table. */
3182 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3183 true, false);
3184 if (stub_entry == NULL)
3185 {
3186 /* xgettext:c-format */
3187 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
3188 section->owner, stub_name);
3189 return NULL;
3190 }
3191
3192 stub_entry->stub_sec = stub_sec;
3193 stub_entry->stub_offset = 0;
3194 stub_entry->id_sec = link_sec;
3195
3196 return stub_entry;
3197 }
3198
3199 /* Add a new stub entry in the final stub section to the stub hash.
3200 Not all fields of the new stub entry are initialised. */
3201
3202 static struct elf_aarch64_stub_hash_entry *
3203 _bfd_aarch64_add_stub_entry_after (const char *stub_name,
3204 asection *link_section,
3205 struct elf_aarch64_link_hash_table *htab)
3206 {
3207 asection *stub_sec;
3208 struct elf_aarch64_stub_hash_entry *stub_entry;
3209
3210 stub_sec = NULL;
3211 /* Only create the actual stub if we will end up needing it. */
3212 if (htab->fix_erratum_843419 & ERRAT_ADRP)
3213 stub_sec = _bfd_aarch64_get_stub_for_link_section (link_section, htab);
3214 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3215 true, false);
3216 if (stub_entry == NULL)
3217 {
3218 _bfd_error_handler (_("cannot create stub entry %s"), stub_name);
3219 return NULL;
3220 }
3221
3222 stub_entry->stub_sec = stub_sec;
3223 stub_entry->stub_offset = 0;
3224 stub_entry->id_sec = link_section;
3225
3226 return stub_entry;
3227 }
3228
3229
3230 static bool
3231 aarch64_build_one_stub (struct bfd_hash_entry *gen_entry,
3232 void *in_arg)
3233 {
3234 struct elf_aarch64_stub_hash_entry *stub_entry;
3235 asection *stub_sec;
3236 bfd *stub_bfd;
3237 bfd_byte *loc;
3238 bfd_vma sym_value;
3239 bfd_vma veneered_insn_loc;
3240 bfd_vma veneer_entry_loc;
3241 bfd_signed_vma branch_offset = 0;
3242 unsigned int template_size;
3243 const uint32_t *template;
3244 unsigned int i;
3245 struct bfd_link_info *info;
3246
3247 /* Massage our args to the form they really have. */
3248 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
3249
3250 info = (struct bfd_link_info *) in_arg;
3251
3252 /* Fail if the target section could not be assigned to an output
3253 section. The user should fix his linker script. */
3254 if (stub_entry->target_section->output_section == NULL
3255 && info->non_contiguous_regions)
3256 info->callbacks->einfo (_("%F%P: Could not assign '%pA' to an output section. "
3257 "Retry without "
3258 "--enable-non-contiguous-regions.\n"),
3259 stub_entry->target_section);
3260
3261 stub_sec = stub_entry->stub_sec;
3262
3263 /* Make a note of the offset within the stubs for this entry. */
3264 stub_entry->stub_offset = stub_sec->size;
3265 loc = stub_sec->contents + stub_entry->stub_offset;
3266
3267 stub_bfd = stub_sec->owner;
3268
3269 /* This is the address of the stub destination. */
3270 sym_value = (stub_entry->target_value
3271 + stub_entry->target_section->output_offset
3272 + stub_entry->target_section->output_section->vma);
3273
3274 if (stub_entry->stub_type == aarch64_stub_long_branch)
3275 {
3276 bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma
3277 + stub_sec->output_offset);
3278
3279 /* See if we can relax the stub. */
3280 if (aarch64_valid_for_adrp_p (sym_value, place))
3281 stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place);
3282 }
3283
3284 switch (stub_entry->stub_type)
3285 {
3286 case aarch64_stub_adrp_branch:
3287 template = aarch64_adrp_branch_stub;
3288 template_size = sizeof (aarch64_adrp_branch_stub);
3289 break;
3290 case aarch64_stub_long_branch:
3291 template = aarch64_long_branch_stub;
3292 template_size = sizeof (aarch64_long_branch_stub);
3293 break;
3294 case aarch64_stub_erratum_835769_veneer:
3295 template = aarch64_erratum_835769_stub;
3296 template_size = sizeof (aarch64_erratum_835769_stub);
3297 break;
3298 case aarch64_stub_erratum_843419_veneer:
3299 template = aarch64_erratum_843419_stub;
3300 template_size = sizeof (aarch64_erratum_843419_stub);
3301 break;
3302 default:
3303 abort ();
3304 }
3305
3306 for (i = 0; i < (template_size / sizeof template[0]); i++)
3307 {
3308 bfd_putl32 (template[i], loc);
3309 loc += 4;
3310 }
3311
3312 template_size = (template_size + 7) & ~7;
3313 stub_sec->size += template_size;
3314
3315 switch (stub_entry->stub_type)
3316 {
3317 case aarch64_stub_adrp_branch:
3318 if (!aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec,
3319 stub_entry->stub_offset, sym_value))
3320 /* The stub would not have been relaxed if the offset was out
3321 of range. */
3322 BFD_FAIL ();
3323
3324 if (!aarch64_relocate (AARCH64_R (ADD_ABS_LO12_NC), stub_bfd, stub_sec,
3325 stub_entry->stub_offset + 4, sym_value))
3326 BFD_FAIL ();
3327 break;
3328
3329 case aarch64_stub_long_branch:
3330 /* We want the value relative to the address 12 bytes back from the
3331 value itself. */
3332 if (!aarch64_relocate (AARCH64_R (PRELNN), stub_bfd, stub_sec,
3333 stub_entry->stub_offset + 16, sym_value + 12))
3334 BFD_FAIL ();
3335 break;
3336
3337 case aarch64_stub_erratum_835769_veneer:
3338 veneered_insn_loc = stub_entry->target_section->output_section->vma
3339 + stub_entry->target_section->output_offset
3340 + stub_entry->target_value;
3341 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
3342 + stub_entry->stub_sec->output_offset
3343 + stub_entry->stub_offset;
3344 branch_offset = veneered_insn_loc - veneer_entry_loc;
3345 branch_offset >>= 2;
3346 branch_offset &= 0x3ffffff;
3347 bfd_putl32 (stub_entry->veneered_insn,
3348 stub_sec->contents + stub_entry->stub_offset);
3349 bfd_putl32 (template[1] | branch_offset,
3350 stub_sec->contents + stub_entry->stub_offset + 4);
3351 break;
3352
3353 case aarch64_stub_erratum_843419_veneer:
3354 if (!aarch64_relocate (AARCH64_R (JUMP26), stub_bfd, stub_sec,
3355 stub_entry->stub_offset + 4, sym_value + 4))
3356 BFD_FAIL ();
3357 break;
3358
3359 default:
3360 abort ();
3361 }
3362
3363 return true;
3364 }
3365
3366 /* As above, but don't actually build the stub. Just bump offset so
3367 we know stub section sizes. */
3368
3369 static bool
3370 aarch64_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
3371 {
3372 struct elf_aarch64_stub_hash_entry *stub_entry;
3373 struct elf_aarch64_link_hash_table *htab;
3374 int size;
3375
3376 /* Massage our args to the form they really have. */
3377 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
3378 htab = (struct elf_aarch64_link_hash_table *) in_arg;
3379
3380 switch (stub_entry->stub_type)
3381 {
3382 case aarch64_stub_adrp_branch:
3383 size = sizeof (aarch64_adrp_branch_stub);
3384 break;
3385 case aarch64_stub_long_branch:
3386 size = sizeof (aarch64_long_branch_stub);
3387 break;
3388 case aarch64_stub_erratum_835769_veneer:
3389 size = sizeof (aarch64_erratum_835769_stub);
3390 break;
3391 case aarch64_stub_erratum_843419_veneer:
3392 {
3393 if (htab->fix_erratum_843419 == ERRAT_ADR)
3394 return true;
3395 size = sizeof (aarch64_erratum_843419_stub);
3396 }
3397 break;
3398 default:
3399 abort ();
3400 }
3401
3402 size = (size + 7) & ~7;
3403 stub_entry->stub_sec->size += size;
3404 return true;
3405 }
3406
3407 /* External entry points for sizing and building linker stubs. */
3408
3409 /* Set up various things so that we can make a list of input sections
3410 for each output section included in the link. Returns -1 on error,
3411 0 when no stubs will be needed, and 1 on success. */
3412
3413 int
3414 elfNN_aarch64_setup_section_lists (bfd *output_bfd,
3415 struct bfd_link_info *info)
3416 {
3417 bfd *input_bfd;
3418 unsigned int bfd_count;
3419 unsigned int top_id, top_index;
3420 asection *section;
3421 asection **input_list, **list;
3422 size_t amt;
3423 struct elf_aarch64_link_hash_table *htab =
3424 elf_aarch64_hash_table (info);
3425
3426 if (!is_elf_hash_table (&htab->root.root))
3427 return 0;
3428
3429 /* Count the number of input BFDs and find the top input section id. */
3430 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3431 input_bfd != NULL; input_bfd = input_bfd->link.next)
3432 {
3433 bfd_count += 1;
3434 for (section = input_bfd->sections;
3435 section != NULL; section = section->next)
3436 {
3437 if (top_id < section->id)
3438 top_id = section->id;
3439 }
3440 }
3441 htab->bfd_count = bfd_count;
3442
3443 amt = sizeof (struct map_stub) * (top_id + 1);
3444 htab->stub_group = bfd_zmalloc (amt);
3445 if (htab->stub_group == NULL)
3446 return -1;
3447
3448 /* We can't use output_bfd->section_count here to find the top output
3449 section index as some sections may have been removed, and
3450 _bfd_strip_section_from_output doesn't renumber the indices. */
3451 for (section = output_bfd->sections, top_index = 0;
3452 section != NULL; section = section->next)
3453 {
3454 if (top_index < section->index)
3455 top_index = section->index;
3456 }
3457
3458 htab->top_index = top_index;
3459 amt = sizeof (asection *) * (top_index + 1);
3460 input_list = bfd_malloc (amt);
3461 htab->input_list = input_list;
3462 if (input_list == NULL)
3463 return -1;
3464
3465 /* For sections we aren't interested in, mark their entries with a
3466 value we can check later. */
3467 list = input_list + top_index;
3468 do
3469 *list = bfd_abs_section_ptr;
3470 while (list-- != input_list);
3471
3472 for (section = output_bfd->sections;
3473 section != NULL; section = section->next)
3474 {
3475 if ((section->flags & SEC_CODE) != 0)
3476 input_list[section->index] = NULL;
3477 }
3478
3479 return 1;
3480 }
3481
3482 /* Used by elfNN_aarch64_next_input_section and group_sections. */
3483 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3484
3485 /* The linker repeatedly calls this function for each input section,
3486 in the order that input sections are linked into output sections.
3487 Build lists of input sections to determine groupings between which
3488 we may insert linker stubs. */
3489
3490 void
3491 elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec)
3492 {
3493 struct elf_aarch64_link_hash_table *htab =
3494 elf_aarch64_hash_table (info);
3495
3496 if (isec->output_section->index <= htab->top_index)
3497 {
3498 asection **list = htab->input_list + isec->output_section->index;
3499
3500 if (*list != bfd_abs_section_ptr && (isec->flags & SEC_CODE) != 0)
3501 {
3502 /* Steal the link_sec pointer for our list. */
3503 /* This happens to make the list in reverse order,
3504 which is what we want. */
3505 PREV_SEC (isec) = *list;
3506 *list = isec;
3507 }
3508 }
3509 }
3510
3511 /* See whether we can group stub sections together. Grouping stub
3512 sections may result in fewer stubs. More importantly, we need to
3513 put all .init* and .fini* stubs at the beginning of the .init or
3514 .fini output sections respectively, because glibc splits the
3515 _init and _fini functions into multiple parts. Putting a stub in
3516 the middle of a function is not a good idea. */
3517
3518 static void
3519 group_sections (struct elf_aarch64_link_hash_table *htab,
3520 bfd_size_type stub_group_size,
3521 bool stubs_always_after_branch)
3522 {
3523 asection **list = htab->input_list;
3524
3525 do
3526 {
3527 asection *tail = *list;
3528 asection *head;
3529
3530 if (tail == bfd_abs_section_ptr)
3531 continue;
3532
3533 /* Reverse the list: we must avoid placing stubs at the
3534 beginning of the section because the beginning of the text
3535 section may be required for an interrupt vector in bare metal
3536 code. */
3537 #define NEXT_SEC PREV_SEC
3538 head = NULL;
3539 while (tail != NULL)
3540 {
3541 /* Pop from tail. */
3542 asection *item = tail;
3543 tail = PREV_SEC (item);
3544
3545 /* Push on head. */
3546 NEXT_SEC (item) = head;
3547 head = item;
3548 }
3549
3550 while (head != NULL)
3551 {
3552 asection *curr;
3553 asection *next;
3554 bfd_vma stub_group_start = head->output_offset;
3555 bfd_vma end_of_next;
3556
3557 curr = head;
3558 while (NEXT_SEC (curr) != NULL)
3559 {
3560 next = NEXT_SEC (curr);
3561 end_of_next = next->output_offset + next->size;
3562 if (end_of_next - stub_group_start >= stub_group_size)
3563 /* End of NEXT is too far from start, so stop. */
3564 break;
3565 /* Add NEXT to the group. */
3566 curr = next;
3567 }
3568
3569 /* OK, the size from the start to the start of CURR is less
3570 than stub_group_size and thus can be handled by one stub
3571 section. (Or the head section is itself larger than
3572 stub_group_size, in which case we may be toast.)
3573 We should really be keeping track of the total size of
3574 stubs added here, as stubs contribute to the final output
3575 section size. */
3576 do
3577 {
3578 next = NEXT_SEC (head);
3579 /* Set up this stub group. */
3580 htab->stub_group[head->id].link_sec = curr;
3581 }
3582 while (head != curr && (head = next) != NULL);
3583
3584 /* But wait, there's more! Input sections up to stub_group_size
3585 bytes after the stub section can be handled by it too. */
3586 if (!stubs_always_after_branch)
3587 {
3588 stub_group_start = curr->output_offset + curr->size;
3589
3590 while (next != NULL)
3591 {
3592 end_of_next = next->output_offset + next->size;
3593 if (end_of_next - stub_group_start >= stub_group_size)
3594 /* End of NEXT is too far from stubs, so stop. */
3595 break;
3596 /* Add NEXT to the stub group. */
3597 head = next;
3598 next = NEXT_SEC (head);
3599 htab->stub_group[head->id].link_sec = curr;
3600 }
3601 }
3602 head = next;
3603 }
3604 }
3605 while (list++ != htab->input_list + htab->top_index);
3606
3607 free (htab->input_list);
3608 }
3609
3610 #undef PREV_SEC
3611 #undef PREV_SEC
3612
3613 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
3614
3615 #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
3616 #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
3617 #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
3618 #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
3619 #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
3620 #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
3621
3622 #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
3623 #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
3624 #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
3625 #define AARCH64_ZR 0x1f
3626
3627 /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
3628 LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
3629
3630 #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
3631 #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
3632 #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
3633 #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
3634 #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
3635 #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
3636 #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
3637 #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
3638 #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
3639 #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
3640 #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
3641 #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
3642 #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
3643 #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
3644 #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
3645 #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
3646 #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
3647 #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
3648
3649 /* Classify an INSN if it is indeed a load/store.
3650
3651 Return TRUE if INSN is a LD/ST instruction otherwise return FALSE.
3652
3653 For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2
3654 is set equal to RT.
3655
3656 For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned. */
3657
3658 static bool
3659 aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rt2,
3660 bool *pair, bool *load)
3661 {
3662 uint32_t opcode;
3663 unsigned int r;
3664 uint32_t opc = 0;
3665 uint32_t v = 0;
3666 uint32_t opc_v = 0;
3667
3668 /* Bail out quickly if INSN doesn't fall into the load-store
3669 encoding space. */
3670 if (!AARCH64_LDST (insn))
3671 return false;
3672
3673 *pair = false;
3674 *load = false;
3675 if (AARCH64_LDST_EX (insn))
3676 {
3677 *rt = AARCH64_RT (insn);
3678 *rt2 = *rt;
3679 if (AARCH64_BIT (insn, 21) == 1)
3680 {
3681 *pair = true;
3682 *rt2 = AARCH64_RT2 (insn);
3683 }
3684 *load = AARCH64_LD (insn);
3685 return true;
3686 }
3687 else if (AARCH64_LDST_NAP (insn)
3688 || AARCH64_LDSTP_PI (insn)
3689 || AARCH64_LDSTP_O (insn)
3690 || AARCH64_LDSTP_PRE (insn))
3691 {
3692 *pair = true;
3693 *rt = AARCH64_RT (insn);
3694 *rt2 = AARCH64_RT2 (insn);
3695 *load = AARCH64_LD (insn);
3696 return true;
3697 }
3698 else if (AARCH64_LDST_PCREL (insn)
3699 || AARCH64_LDST_UI (insn)
3700 || AARCH64_LDST_PIIMM (insn)
3701 || AARCH64_LDST_U (insn)
3702 || AARCH64_LDST_PREIMM (insn)
3703 || AARCH64_LDST_RO (insn)
3704 || AARCH64_LDST_UIMM (insn))
3705 {
3706 *rt = AARCH64_RT (insn);
3707 *rt2 = *rt;
3708 if (AARCH64_LDST_PCREL (insn))
3709 *load = true;
3710 opc = AARCH64_BITS (insn, 22, 2);
3711 v = AARCH64_BIT (insn, 26);
3712 opc_v = opc | (v << 2);
3713 *load = (opc_v == 1 || opc_v == 2 || opc_v == 3
3714 || opc_v == 5 || opc_v == 7);
3715 return true;
3716 }
3717 else if (AARCH64_LDST_SIMD_M (insn)
3718 || AARCH64_LDST_SIMD_M_PI (insn))
3719 {
3720 *rt = AARCH64_RT (insn);
3721 *load = AARCH64_BIT (insn, 22);
3722 opcode = (insn >> 12) & 0xf;
3723 switch (opcode)
3724 {
3725 case 0:
3726 case 2:
3727 *rt2 = *rt + 3;
3728 break;
3729
3730 case 4:
3731 case 6:
3732 *rt2 = *rt + 2;
3733 break;
3734
3735 case 7:
3736 *rt2 = *rt;
3737 break;
3738
3739 case 8:
3740 case 10:
3741 *rt2 = *rt + 1;
3742 break;
3743
3744 default:
3745 return false;
3746 }
3747 return true;
3748 }
3749 else if (AARCH64_LDST_SIMD_S (insn)
3750 || AARCH64_LDST_SIMD_S_PI (insn))
3751 {
3752 *rt = AARCH64_RT (insn);
3753 r = (insn >> 21) & 1;
3754 *load = AARCH64_BIT (insn, 22);
3755 opcode = (insn >> 13) & 0x7;
3756 switch (opcode)
3757 {
3758 case 0:
3759 case 2:
3760 case 4:
3761 *rt2 = *rt + r;
3762 break;
3763
3764 case 1:
3765 case 3:
3766 case 5:
3767 *rt2 = *rt + (r == 0 ? 2 : 3);
3768 break;
3769
3770 case 6:
3771 *rt2 = *rt + r;
3772 break;
3773
3774 case 7:
3775 *rt2 = *rt + (r == 0 ? 2 : 3);
3776 break;
3777
3778 default:
3779 return false;
3780 }
3781 return true;
3782 }
3783
3784 return false;
3785 }
3786
3787 /* Return TRUE if INSN is multiply-accumulate. */
3788
3789 static bool
3790 aarch64_mlxl_p (uint32_t insn)
3791 {
3792 uint32_t op31 = AARCH64_OP31 (insn);
3793
3794 if (AARCH64_MAC (insn)
3795 && (op31 == 0 || op31 == 1 || op31 == 5)
3796 /* Exclude MUL instructions which are encoded as a multiple accumulate
3797 with RA = XZR. */
3798 && AARCH64_RA (insn) != AARCH64_ZR)
3799 return true;
3800
3801 return false;
3802 }
3803
3804 /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
3805 it is possible for a 64-bit multiply-accumulate instruction to generate an
3806 incorrect result. The details are quite complex and hard to
3807 determine statically, since branches in the code may exist in some
3808 circumstances, but all cases end with a memory (load, store, or
3809 prefetch) instruction followed immediately by the multiply-accumulate
3810 operation. We employ a linker patching technique, by moving the potentially
3811 affected multiply-accumulate instruction into a patch region and replacing
3812 the original instruction with a branch to the patch. This function checks
3813 if INSN_1 is the memory operation followed by a multiply-accumulate
3814 operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
3815 if INSN_1 and INSN_2 are safe. */
3816
3817 static bool
3818 aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2)
3819 {
3820 uint32_t rt;
3821 uint32_t rt2;
3822 uint32_t rn;
3823 uint32_t rm;
3824 uint32_t ra;
3825 bool pair;
3826 bool load;
3827
3828 if (aarch64_mlxl_p (insn_2)
3829 && aarch64_mem_op_p (insn_1, &rt, &rt2, &pair, &load))
3830 {
3831 /* Any SIMD memory op is independent of the subsequent MLA
3832 by definition of the erratum. */
3833 if (AARCH64_BIT (insn_1, 26))
3834 return true;
3835
3836 /* If not SIMD, check for integer memory ops and MLA relationship. */
3837 rn = AARCH64_RN (insn_2);
3838 ra = AARCH64_RA (insn_2);
3839 rm = AARCH64_RM (insn_2);
3840
3841 /* If this is a load and there's a true(RAW) dependency, we are safe
3842 and this is not an erratum sequence. */
3843 if (load &&
3844 (rt == rn || rt == rm || rt == ra
3845 || (pair && (rt2 == rn || rt2 == rm || rt2 == ra))))
3846 return false;
3847
3848 /* We conservatively put out stubs for all other cases (including
3849 writebacks). */
3850 return true;
3851 }
3852
3853 return false;
3854 }
3855
3856 /* Used to order a list of mapping symbols by address. */
3857
3858 static int
3859 elf_aarch64_compare_mapping (const void *a, const void *b)
3860 {
3861 const elf_aarch64_section_map *amap = (const elf_aarch64_section_map *) a;
3862 const elf_aarch64_section_map *bmap = (const elf_aarch64_section_map *) b;
3863
3864 if (amap->vma > bmap->vma)
3865 return 1;
3866 else if (amap->vma < bmap->vma)
3867 return -1;
3868 else if (amap->type > bmap->type)
3869 /* Ensure results do not depend on the host qsort for objects with
3870 multiple mapping symbols at the same address by sorting on type
3871 after vma. */
3872 return 1;
3873 else if (amap->type < bmap->type)
3874 return -1;
3875 else
3876 return 0;
3877 }
3878
3879
3880 static char *
3881 _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes)
3882 {
3883 char *stub_name = (char *) bfd_malloc
3884 (strlen ("__erratum_835769_veneer_") + 16);
3885 if (stub_name != NULL)
3886 sprintf (stub_name,"__erratum_835769_veneer_%d", num_fixes);
3887 return stub_name;
3888 }
3889
3890 /* Scan for Cortex-A53 erratum 835769 sequence.
3891
3892 Return TRUE else FALSE on abnormal termination. */
3893
3894 static bool
3895 _bfd_aarch64_erratum_835769_scan (bfd *input_bfd,
3896 struct bfd_link_info *info,
3897 unsigned int *num_fixes_p)
3898 {
3899 asection *section;
3900 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3901 unsigned int num_fixes = *num_fixes_p;
3902
3903 if (htab == NULL)
3904 return true;
3905
3906 for (section = input_bfd->sections;
3907 section != NULL;
3908 section = section->next)
3909 {
3910 bfd_byte *contents = NULL;
3911 struct _aarch64_elf_section_data *sec_data;
3912 unsigned int span;
3913
3914 if (elf_section_type (section) != SHT_PROGBITS
3915 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
3916 || (section->flags & SEC_EXCLUDE) != 0
3917 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
3918 || (section->output_section == bfd_abs_section_ptr))
3919 continue;
3920
3921 if (elf_section_data (section)->this_hdr.contents != NULL)
3922 contents = elf_section_data (section)->this_hdr.contents;
3923 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
3924 return false;
3925
3926 sec_data = elf_aarch64_section_data (section);
3927
3928 if (sec_data->mapcount)
3929 qsort (sec_data->map, sec_data->mapcount,
3930 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
3931
3932 for (span = 0; span < sec_data->mapcount; span++)
3933 {
3934 unsigned int span_start = sec_data->map[span].vma;
3935 unsigned int span_end = ((span == sec_data->mapcount - 1)
3936 ? sec_data->map[0].vma + section->size
3937 : sec_data->map[span + 1].vma);
3938 unsigned int i;
3939 char span_type = sec_data->map[span].type;
3940
3941 if (span_type == 'd')
3942 continue;
3943
3944 for (i = span_start; i + 4 < span_end; i += 4)
3945 {
3946 uint32_t insn_1 = bfd_getl32 (contents + i);
3947 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
3948
3949 if (aarch64_erratum_sequence (insn_1, insn_2))
3950 {
3951 struct elf_aarch64_stub_hash_entry *stub_entry;
3952 char *stub_name = _bfd_aarch64_erratum_835769_stub_name (num_fixes);
3953 if (! stub_name)
3954 return false;
3955
3956 stub_entry = _bfd_aarch64_add_stub_entry_in_group (stub_name,
3957 section,
3958 htab);
3959 if (! stub_entry)
3960 return false;
3961
3962 stub_entry->stub_type = aarch64_stub_erratum_835769_veneer;
3963 stub_entry->target_section = section;
3964 stub_entry->target_value = i + 4;
3965 stub_entry->veneered_insn = insn_2;
3966 stub_entry->output_name = stub_name;
3967 num_fixes++;
3968 }
3969 }
3970 }
3971 if (elf_section_data (section)->this_hdr.contents == NULL)
3972 free (contents);
3973 }
3974
3975 *num_fixes_p = num_fixes;
3976
3977 return true;
3978 }
3979
3980
3981 /* Test if instruction INSN is ADRP. */
3982
3983 static bool
3984 _bfd_aarch64_adrp_p (uint32_t insn)
3985 {
3986 return ((insn & AARCH64_ADRP_OP_MASK) == AARCH64_ADRP_OP);
3987 }
3988
3989
3990 /* Helper predicate to look for cortex-a53 erratum 843419 sequence 1. */
3991
3992 static bool
3993 _bfd_aarch64_erratum_843419_sequence_p (uint32_t insn_1, uint32_t insn_2,
3994 uint32_t insn_3)
3995 {
3996 uint32_t rt;
3997 uint32_t rt2;
3998 bool pair;
3999 bool load;
4000
4001 return (aarch64_mem_op_p (insn_2, &rt, &rt2, &pair, &load)
4002 && (!pair
4003 || (pair && !load))
4004 && AARCH64_LDST_UIMM (insn_3)
4005 && AARCH64_RN (insn_3) == AARCH64_RD (insn_1));
4006 }
4007
4008
4009 /* Test for the presence of Cortex-A53 erratum 843419 instruction sequence.
4010
4011 Return TRUE if section CONTENTS at offset I contains one of the
4012 erratum 843419 sequences, otherwise return FALSE. If a sequence is
4013 seen set P_VENEER_I to the offset of the final LOAD/STORE
4014 instruction in the sequence.
4015 */
4016
4017 static bool
4018 _bfd_aarch64_erratum_843419_p (bfd_byte *contents, bfd_vma vma,
4019 bfd_vma i, bfd_vma span_end,
4020 bfd_vma *p_veneer_i)
4021 {
4022 uint32_t insn_1 = bfd_getl32 (contents + i);
4023
4024 if (!_bfd_aarch64_adrp_p (insn_1))
4025 return false;
4026
4027 if (span_end < i + 12)
4028 return false;
4029
4030 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
4031 uint32_t insn_3 = bfd_getl32 (contents + i + 8);
4032
4033 if ((vma & 0xfff) != 0xff8 && (vma & 0xfff) != 0xffc)
4034 return false;
4035
4036 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_3))
4037 {
4038 *p_veneer_i = i + 8;
4039 return true;
4040 }
4041
4042 if (span_end < i + 16)
4043 return false;
4044
4045 uint32_t insn_4 = bfd_getl32 (contents + i + 12);
4046
4047 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_4))
4048 {
4049 *p_veneer_i = i + 12;
4050 return true;
4051 }
4052
4053 return false;
4054 }
4055
4056
4057 /* Resize all stub sections. */
4058
4059 static void
4060 _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table *htab)
4061 {
4062 asection *section;
4063
4064 /* OK, we've added some stubs. Find out the new size of the
4065 stub sections. */
4066 for (section = htab->stub_bfd->sections;
4067 section != NULL; section = section->next)
4068 {
4069 /* Ignore non-stub sections. */
4070 if (!strstr (section->name, STUB_SUFFIX))
4071 continue;
4072 section->size = 0;
4073 }
4074
4075 bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab);
4076
4077 for (section = htab->stub_bfd->sections;
4078 section != NULL; section = section->next)
4079 {
4080 if (!strstr (section->name, STUB_SUFFIX))
4081 continue;
4082
4083 /* Add space for a branch. Add 8 bytes to keep section 8 byte aligned,
4084 as long branch stubs contain a 64-bit address. */
4085 if (section->size)
4086 section->size += 8;
4087
4088 /* Ensure all stub sections have a size which is a multiple of
4089 4096. This is important in order to ensure that the insertion
4090 of stub sections does not in itself move existing code around
4091 in such a way that new errata sequences are created. We only do this
4092 when the ADRP workaround is enabled. If only the ADR workaround is
4093 enabled then the stubs workaround won't ever be used. */
4094 if (htab->fix_erratum_843419 & ERRAT_ADRP)
4095 if (section->size)
4096 section->size = BFD_ALIGN (section->size, 0x1000);
4097 }
4098 }
4099
4100 /* Construct an erratum 843419 workaround stub name. */
4101
4102 static char *
4103 _bfd_aarch64_erratum_843419_stub_name (asection *input_section,
4104 bfd_vma offset)
4105 {
4106 const bfd_size_type len = 8 + 4 + 1 + 8 + 1 + 16 + 1;
4107 char *stub_name = bfd_malloc (len);
4108
4109 if (stub_name != NULL)
4110 snprintf (stub_name, len, "e843419@%04x_%08x_%" BFD_VMA_FMT "x",
4111 input_section->owner->id,
4112 input_section->id,
4113 offset);
4114 return stub_name;
4115 }
4116
4117 /* Build a stub_entry structure describing an 843419 fixup.
4118
4119 The stub_entry constructed is populated with the bit pattern INSN
4120 of the instruction located at OFFSET within input SECTION.
4121
4122 Returns TRUE on success. */
4123
4124 static bool
4125 _bfd_aarch64_erratum_843419_fixup (uint32_t insn,
4126 bfd_vma adrp_offset,
4127 bfd_vma ldst_offset,
4128 asection *section,
4129 struct bfd_link_info *info)
4130 {
4131 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
4132 char *stub_name;
4133 struct elf_aarch64_stub_hash_entry *stub_entry;
4134
4135 stub_name = _bfd_aarch64_erratum_843419_stub_name (section, ldst_offset);
4136 if (stub_name == NULL)
4137 return false;
4138 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
4139 false, false);
4140 if (stub_entry)
4141 {
4142 free (stub_name);
4143 return true;
4144 }
4145
4146 /* We always place an 843419 workaround veneer in the stub section
4147 attached to the input section in which an erratum sequence has
4148 been found. This ensures that later in the link process (in
4149 elfNN_aarch64_write_section) when we copy the veneered
4150 instruction from the input section into the stub section the
4151 copied instruction will have had any relocations applied to it.
4152 If we placed workaround veneers in any other stub section then we
4153 could not assume that all relocations have been processed on the
4154 corresponding input section at the point we output the stub
4155 section. */
4156
4157 stub_entry = _bfd_aarch64_add_stub_entry_after (stub_name, section, htab);
4158 if (stub_entry == NULL)
4159 {
4160 free (stub_name);
4161 return false;
4162 }
4163
4164 stub_entry->adrp_offset = adrp_offset;
4165 stub_entry->target_value = ldst_offset;
4166 stub_entry->target_section = section;
4167 stub_entry->stub_type = aarch64_stub_erratum_843419_veneer;
4168 stub_entry->veneered_insn = insn;
4169 stub_entry->output_name = stub_name;
4170
4171 return true;
4172 }
4173
4174
4175 /* Scan an input section looking for the signature of erratum 843419.
4176
4177 Scans input SECTION in INPUT_BFD looking for erratum 843419
4178 signatures, for each signature found a stub_entry is created
4179 describing the location of the erratum for subsequent fixup.
4180
4181 Return TRUE on successful scan, FALSE on failure to scan.
4182 */
4183
4184 static bool
4185 _bfd_aarch64_erratum_843419_scan (bfd *input_bfd, asection *section,
4186 struct bfd_link_info *info)
4187 {
4188 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
4189
4190 if (htab == NULL)
4191 return true;
4192
4193 if (elf_section_type (section) != SHT_PROGBITS
4194 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
4195 || (section->flags & SEC_EXCLUDE) != 0
4196 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
4197 || (section->output_section == bfd_abs_section_ptr))
4198 return true;
4199
4200 do
4201 {
4202 bfd_byte *contents = NULL;
4203 struct _aarch64_elf_section_data *sec_data;
4204 unsigned int span;
4205
4206 if (elf_section_data (section)->this_hdr.contents != NULL)
4207 contents = elf_section_data (section)->this_hdr.contents;
4208 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
4209 return false;
4210
4211 sec_data = elf_aarch64_section_data (section);
4212
4213 if (sec_data->mapcount)
4214 qsort (sec_data->map, sec_data->mapcount,
4215 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
4216
4217 for (span = 0; span < sec_data->mapcount; span++)
4218 {
4219 unsigned int span_start = sec_data->map[span].vma;
4220 unsigned int span_end = ((span == sec_data->mapcount - 1)
4221 ? sec_data->map[0].vma + section->size
4222 : sec_data->map[span + 1].vma);
4223 unsigned int i;
4224 char span_type = sec_data->map[span].type;
4225
4226 if (span_type == 'd')
4227 continue;
4228
4229 for (i = span_start; i + 8 < span_end; i += 4)
4230 {
4231 bfd_vma vma = (section->output_section->vma
4232 + section->output_offset
4233 + i);
4234 bfd_vma veneer_i;
4235
4236 if (_bfd_aarch64_erratum_843419_p
4237 (contents, vma, i, span_end, &veneer_i))
4238 {
4239 uint32_t insn = bfd_getl32 (contents + veneer_i);
4240
4241 if (!_bfd_aarch64_erratum_843419_fixup (insn, i, veneer_i,
4242 section, info))
4243 return false;
4244 }
4245 }
4246 }
4247
4248 if (elf_section_data (section)->this_hdr.contents == NULL)
4249 free (contents);
4250 }
4251 while (0);
4252
4253 return true;
4254 }
4255
4256
4257 /* Determine and set the size of the stub section for a final link.
4258
4259 The basic idea here is to examine all the relocations looking for
4260 PC-relative calls to a target that is unreachable with a "bl"
4261 instruction. */
4262
4263 bool
4264 elfNN_aarch64_size_stubs (bfd *output_bfd,
4265 bfd *stub_bfd,
4266 struct bfd_link_info *info,
4267 bfd_signed_vma group_size,
4268 asection * (*add_stub_section) (const char *,
4269 asection *),
4270 void (*layout_sections_again) (void))
4271 {
4272 bfd_size_type stub_group_size;
4273 bool stubs_always_before_branch;
4274 bool stub_changed = false;
4275 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
4276 unsigned int num_erratum_835769_fixes = 0;
4277
4278 /* Propagate mach to stub bfd, because it may not have been
4279 finalized when we created stub_bfd. */
4280 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
4281 bfd_get_mach (output_bfd));
4282
4283 /* Stash our params away. */
4284 htab->stub_bfd = stub_bfd;
4285 htab->add_stub_section = add_stub_section;
4286 htab->layout_sections_again = layout_sections_again;
4287 stubs_always_before_branch = group_size < 0;
4288 if (group_size < 0)
4289 stub_group_size = -group_size;
4290 else
4291 stub_group_size = group_size;
4292
4293 if (stub_group_size == 1)
4294 {
4295 /* Default values. */
4296 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
4297 stub_group_size = 127 * 1024 * 1024;
4298 }
4299
4300 group_sections (htab, stub_group_size, stubs_always_before_branch);
4301
4302 (*htab->layout_sections_again) ();
4303
4304 if (htab->fix_erratum_835769)
4305 {
4306 bfd *input_bfd;
4307
4308 for (input_bfd = info->input_bfds;
4309 input_bfd != NULL; input_bfd = input_bfd->link.next)
4310 {
4311 if (!is_aarch64_elf (input_bfd)
4312 || (input_bfd->flags & BFD_LINKER_CREATED) != 0)
4313 continue;
4314
4315 if (!_bfd_aarch64_erratum_835769_scan (input_bfd, info,
4316 &num_erratum_835769_fixes))
4317 return false;
4318 }
4319
4320 _bfd_aarch64_resize_stubs (htab);
4321 (*htab->layout_sections_again) ();
4322 }
4323
4324 if (htab->fix_erratum_843419 != ERRAT_NONE)
4325 {
4326 bfd *input_bfd;
4327
4328 for (input_bfd = info->input_bfds;
4329 input_bfd != NULL;
4330 input_bfd = input_bfd->link.next)
4331 {
4332 asection *section;
4333
4334 if (!is_aarch64_elf (input_bfd)
4335 || (input_bfd->flags & BFD_LINKER_CREATED) != 0)
4336 continue;
4337
4338 for (section = input_bfd->sections;
4339 section != NULL;
4340 section = section->next)
4341 if (!_bfd_aarch64_erratum_843419_scan (input_bfd, section, info))
4342 return false;
4343 }
4344
4345 _bfd_aarch64_resize_stubs (htab);
4346 (*htab->layout_sections_again) ();
4347 }
4348
4349 while (1)
4350 {
4351 bfd *input_bfd;
4352
4353 for (input_bfd = info->input_bfds;
4354 input_bfd != NULL; input_bfd = input_bfd->link.next)
4355 {
4356 Elf_Internal_Shdr *symtab_hdr;
4357 asection *section;
4358 Elf_Internal_Sym *local_syms = NULL;
4359
4360 if (!is_aarch64_elf (input_bfd)
4361 || (input_bfd->flags & BFD_LINKER_CREATED) != 0)
4362 continue;
4363
4364 /* We'll need the symbol table in a second. */
4365 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4366 if (symtab_hdr->sh_info == 0)
4367 continue;
4368
4369 /* Walk over each section attached to the input bfd. */
4370 for (section = input_bfd->sections;
4371 section != NULL; section = section->next)
4372 {
4373 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
4374
4375 /* If there aren't any relocs, then there's nothing more
4376 to do. */
4377 if ((section->flags & SEC_RELOC) == 0
4378 || section->reloc_count == 0
4379 || (section->flags & SEC_CODE) == 0)
4380 continue;
4381
4382 /* If this section is a link-once section that will be
4383 discarded, then don't create any stubs. */
4384 if (section->output_section == NULL
4385 || section->output_section->owner != output_bfd)
4386 continue;
4387
4388 /* Get the relocs. */
4389 internal_relocs
4390 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
4391 NULL, info->keep_memory);
4392 if (internal_relocs == NULL)
4393 goto error_ret_free_local;
4394
4395 /* Now examine each relocation. */
4396 irela = internal_relocs;
4397 irelaend = irela + section->reloc_count;
4398 for (; irela < irelaend; irela++)
4399 {
4400 unsigned int r_type, r_indx;
4401 enum elf_aarch64_stub_type stub_type;
4402 struct elf_aarch64_stub_hash_entry *stub_entry;
4403 asection *sym_sec;
4404 bfd_vma sym_value;
4405 bfd_vma destination;
4406 struct elf_aarch64_link_hash_entry *hash;
4407 const char *sym_name;
4408 char *stub_name;
4409 const asection *id_sec;
4410 unsigned char st_type;
4411 bfd_size_type len;
4412
4413 r_type = ELFNN_R_TYPE (irela->r_info);
4414 r_indx = ELFNN_R_SYM (irela->r_info);
4415
4416 if (r_type >= (unsigned int) R_AARCH64_end)
4417 {
4418 bfd_set_error (bfd_error_bad_value);
4419 error_ret_free_internal:
4420 if (elf_section_data (section)->relocs == NULL)
4421 free (internal_relocs);
4422 goto error_ret_free_local;
4423 }
4424
4425 /* Only look for stubs on unconditional branch and
4426 branch and link instructions. */
4427 if (r_type != (unsigned int) AARCH64_R (CALL26)
4428 && r_type != (unsigned int) AARCH64_R (JUMP26))
4429 continue;
4430
4431 /* Now determine the call target, its name, value,
4432 section. */
4433 sym_sec = NULL;
4434 sym_value = 0;
4435 destination = 0;
4436 hash = NULL;
4437 sym_name = NULL;
4438 if (r_indx < symtab_hdr->sh_info)
4439 {
4440 /* It's a local symbol. */
4441 Elf_Internal_Sym *sym;
4442 Elf_Internal_Shdr *hdr;
4443
4444 if (local_syms == NULL)
4445 {
4446 local_syms
4447 = (Elf_Internal_Sym *) symtab_hdr->contents;
4448 if (local_syms == NULL)
4449 local_syms
4450 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
4451 symtab_hdr->sh_info, 0,
4452 NULL, NULL, NULL);
4453 if (local_syms == NULL)
4454 goto error_ret_free_internal;
4455 }
4456
4457 sym = local_syms + r_indx;
4458 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
4459 sym_sec = hdr->bfd_section;
4460 if (!sym_sec)
4461 /* This is an undefined symbol. It can never
4462 be resolved. */
4463 continue;
4464
4465 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4466 sym_value = sym->st_value;
4467 destination = (sym_value + irela->r_addend
4468 + sym_sec->output_offset
4469 + sym_sec->output_section->vma);
4470 st_type = ELF_ST_TYPE (sym->st_info);
4471 sym_name
4472 = bfd_elf_string_from_elf_section (input_bfd,
4473 symtab_hdr->sh_link,
4474 sym->st_name);
4475 }
4476 else
4477 {
4478 int e_indx;
4479
4480 e_indx = r_indx - symtab_hdr->sh_info;
4481 hash = ((struct elf_aarch64_link_hash_entry *)
4482 elf_sym_hashes (input_bfd)[e_indx]);
4483
4484 while (hash->root.root.type == bfd_link_hash_indirect
4485 || hash->root.root.type == bfd_link_hash_warning)
4486 hash = ((struct elf_aarch64_link_hash_entry *)
4487 hash->root.root.u.i.link);
4488
4489 if (hash->root.root.type == bfd_link_hash_defined
4490 || hash->root.root.type == bfd_link_hash_defweak)
4491 {
4492 struct elf_aarch64_link_hash_table *globals =
4493 elf_aarch64_hash_table (info);
4494 sym_sec = hash->root.root.u.def.section;
4495 sym_value = hash->root.root.u.def.value;
4496 /* For a destination in a shared library,
4497 use the PLT stub as target address to
4498 decide whether a branch stub is
4499 needed. */
4500 if (globals->root.splt != NULL && hash != NULL
4501 && hash->root.plt.offset != (bfd_vma) - 1)
4502 {
4503 sym_sec = globals->root.splt;
4504 sym_value = hash->root.plt.offset;
4505 if (sym_sec->output_section != NULL)
4506 destination = (sym_value
4507 + sym_sec->output_offset
4508 +
4509 sym_sec->output_section->vma);
4510 }
4511 else if (sym_sec->output_section != NULL)
4512 destination = (sym_value + irela->r_addend
4513 + sym_sec->output_offset
4514 + sym_sec->output_section->vma);
4515 }
4516 else if (hash->root.root.type == bfd_link_hash_undefined
4517 || (hash->root.root.type
4518 == bfd_link_hash_undefweak))
4519 {
4520 /* For a shared library, use the PLT stub as
4521 target address to decide whether a long
4522 branch stub is needed.
4523 For absolute code, they cannot be handled. */
4524 struct elf_aarch64_link_hash_table *globals =
4525 elf_aarch64_hash_table (info);
4526
4527 if (globals->root.splt != NULL && hash != NULL
4528 && hash->root.plt.offset != (bfd_vma) - 1)
4529 {
4530 sym_sec = globals->root.splt;
4531 sym_value = hash->root.plt.offset;
4532 if (sym_sec->output_section != NULL)
4533 destination = (sym_value
4534 + sym_sec->output_offset
4535 +
4536 sym_sec->output_section->vma);
4537 }
4538 else
4539 continue;
4540 }
4541 else
4542 {
4543 bfd_set_error (bfd_error_bad_value);
4544 goto error_ret_free_internal;
4545 }
4546 st_type = ELF_ST_TYPE (hash->root.type);
4547 sym_name = hash->root.root.root.string;
4548 }
4549
4550 /* Determine what (if any) linker stub is needed. */
4551 stub_type = aarch64_type_of_stub (section, irela, sym_sec,
4552 st_type, destination);
4553 if (stub_type == aarch64_stub_none)
4554 continue;
4555
4556 /* Support for grouping stub sections. */
4557 id_sec = htab->stub_group[section->id].link_sec;
4558
4559 /* Get the name of this stub. */
4560 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash,
4561 irela);
4562 if (!stub_name)
4563 goto error_ret_free_internal;
4564
4565 stub_entry =
4566 aarch64_stub_hash_lookup (&htab->stub_hash_table,
4567 stub_name, false, false);
4568 if (stub_entry != NULL)
4569 {
4570 /* The proper stub has already been created. */
4571 free (stub_name);
4572 /* Always update this stub's target since it may have
4573 changed after layout. */
4574 stub_entry->target_value = sym_value + irela->r_addend;
4575 continue;
4576 }
4577
4578 stub_entry = _bfd_aarch64_add_stub_entry_in_group
4579 (stub_name, section, htab);
4580 if (stub_entry == NULL)
4581 {
4582 free (stub_name);
4583 goto error_ret_free_internal;
4584 }
4585
4586 stub_entry->target_value = sym_value + irela->r_addend;
4587 stub_entry->target_section = sym_sec;
4588 stub_entry->stub_type = stub_type;
4589 stub_entry->h = hash;
4590 stub_entry->st_type = st_type;
4591
4592 if (sym_name == NULL)
4593 sym_name = "unnamed";
4594 len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name);
4595 stub_entry->output_name = bfd_alloc (htab->stub_bfd, len);
4596 if (stub_entry->output_name == NULL)
4597 {
4598 free (stub_name);
4599 goto error_ret_free_internal;
4600 }
4601
4602 snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME,
4603 sym_name);
4604
4605 stub_changed = true;
4606 }
4607
4608 /* We're done with the internal relocs, free them. */
4609 if (elf_section_data (section)->relocs == NULL)
4610 free (internal_relocs);
4611 }
4612 }
4613
4614 if (!stub_changed)
4615 break;
4616
4617 _bfd_aarch64_resize_stubs (htab);
4618
4619 /* Ask the linker to do its stuff. */
4620 (*htab->layout_sections_again) ();
4621 stub_changed = false;
4622 }
4623
4624 return true;
4625
4626 error_ret_free_local:
4627 return false;
4628 }
4629
4630 /* Build all the stubs associated with the current output file. The
4631 stubs are kept in a hash table attached to the main linker hash
4632 table. We also set up the .plt entries for statically linked PIC
4633 functions here. This function is called via aarch64_elf_finish in the
4634 linker. */
4635
4636 bool
4637 elfNN_aarch64_build_stubs (struct bfd_link_info *info)
4638 {
4639 asection *stub_sec;
4640 struct bfd_hash_table *table;
4641 struct elf_aarch64_link_hash_table *htab;
4642
4643 htab = elf_aarch64_hash_table (info);
4644
4645 for (stub_sec = htab->stub_bfd->sections;
4646 stub_sec != NULL; stub_sec = stub_sec->next)
4647 {
4648 bfd_size_type size;
4649
4650 /* Ignore non-stub sections. */
4651 if (!strstr (stub_sec->name, STUB_SUFFIX))
4652 continue;
4653
4654 /* Allocate memory to hold the linker stubs. */
4655 size = stub_sec->size;
4656 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4657 if (stub_sec->contents == NULL && size != 0)
4658 return false;
4659 stub_sec->size = 0;
4660
4661 /* Add a branch around the stub section, and a nop, to keep it 8 byte
4662 aligned, as long branch stubs contain a 64-bit address. */
4663 bfd_putl32 (0x14000000 | (size >> 2), stub_sec->contents);
4664 bfd_putl32 (INSN_NOP, stub_sec->contents + 4);
4665 stub_sec->size += 8;
4666 }
4667
4668 /* Build the stubs as directed by the stub hash table. */
4669 table = &htab->stub_hash_table;
4670 bfd_hash_traverse (table, aarch64_build_one_stub, info);
4671
4672 return true;
4673 }
4674
4675
4676 /* Add an entry to the code/data map for section SEC. */
4677
4678 static void
4679 elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma)
4680 {
4681 struct _aarch64_elf_section_data *sec_data =
4682 elf_aarch64_section_data (sec);
4683 unsigned int newidx;
4684
4685 if (sec_data->map == NULL)
4686 {
4687 sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map));
4688 sec_data->mapcount = 0;
4689 sec_data->mapsize = 1;
4690 }
4691
4692 newidx = sec_data->mapcount++;
4693
4694 if (sec_data->mapcount > sec_data->mapsize)
4695 {
4696 sec_data->mapsize *= 2;
4697 sec_data->map = bfd_realloc_or_free
4698 (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map));
4699 }
4700
4701 if (sec_data->map)
4702 {
4703 sec_data->map[newidx].vma = vma;
4704 sec_data->map[newidx].type = type;
4705 }
4706 }
4707
4708
4709 /* Initialise maps of insn/data for input BFDs. */
4710 void
4711 bfd_elfNN_aarch64_init_maps (bfd *abfd)
4712 {
4713 Elf_Internal_Sym *isymbuf;
4714 Elf_Internal_Shdr *hdr;
4715 unsigned int i, localsyms;
4716
4717 /* Make sure that we are dealing with an AArch64 elf binary. */
4718 if (!is_aarch64_elf (abfd))
4719 return;
4720
4721 if ((abfd->flags & DYNAMIC) != 0)
4722 return;
4723
4724 hdr = &elf_symtab_hdr (abfd);
4725 localsyms = hdr->sh_info;
4726
4727 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
4728 should contain the number of local symbols, which should come before any
4729 global symbols. Mapping symbols are always local. */
4730 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL);
4731
4732 /* No internal symbols read? Skip this BFD. */
4733 if (isymbuf == NULL)
4734 return;
4735
4736 for (i = 0; i < localsyms; i++)
4737 {
4738 Elf_Internal_Sym *isym = &isymbuf[i];
4739 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4740 const char *name;
4741
4742 if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
4743 {
4744 name = bfd_elf_string_from_elf_section (abfd,
4745 hdr->sh_link,
4746 isym->st_name);
4747
4748 if (bfd_is_aarch64_special_symbol_name
4749 (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP))
4750 elfNN_aarch64_section_map_add (sec, name[1], isym->st_value);
4751 }
4752 }
4753 }
4754
4755 static void
4756 setup_plt_values (struct bfd_link_info *link_info,
4757 aarch64_plt_type plt_type)
4758 {
4759 struct elf_aarch64_link_hash_table *globals;
4760 globals = elf_aarch64_hash_table (link_info);
4761
4762 if (plt_type == PLT_BTI_PAC)
4763 {
4764 globals->plt0_entry = elfNN_aarch64_small_plt0_bti_entry;
4765
4766 /* Only in ET_EXEC we need PLTn with BTI. */
4767 if (bfd_link_pde (link_info))
4768 {
4769 globals->plt_entry_size = PLT_BTI_PAC_SMALL_ENTRY_SIZE;
4770 globals->plt_entry = elfNN_aarch64_small_plt_bti_pac_entry;
4771 }
4772 else
4773 {
4774 globals->plt_entry_size = PLT_PAC_SMALL_ENTRY_SIZE;
4775 globals->plt_entry = elfNN_aarch64_small_plt_pac_entry;
4776 }
4777 }
4778 else if (plt_type == PLT_BTI)
4779 {
4780 globals->plt0_entry = elfNN_aarch64_small_plt0_bti_entry;
4781
4782 /* Only in ET_EXEC we need PLTn with BTI. */
4783 if (bfd_link_pde (link_info))
4784 {
4785 globals->plt_entry_size = PLT_BTI_SMALL_ENTRY_SIZE;
4786 globals->plt_entry = elfNN_aarch64_small_plt_bti_entry;
4787 }
4788 }
4789 else if (plt_type == PLT_PAC)
4790 {
4791 globals->plt_entry_size = PLT_PAC_SMALL_ENTRY_SIZE;
4792 globals->plt_entry = elfNN_aarch64_small_plt_pac_entry;
4793 }
4794 }
4795
4796 /* Set option values needed during linking. */
4797 void
4798 bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
4799 struct bfd_link_info *link_info,
4800 int no_enum_warn,
4801 int no_wchar_warn, int pic_veneer,
4802 int fix_erratum_835769,
4803 erratum_84319_opts fix_erratum_843419,
4804 int no_apply_dynamic_relocs,
4805 aarch64_bti_pac_info bp_info)
4806 {
4807 struct elf_aarch64_link_hash_table *globals;
4808
4809 globals = elf_aarch64_hash_table (link_info);
4810 globals->pic_veneer = pic_veneer;
4811 globals->fix_erratum_835769 = fix_erratum_835769;
4812 /* If the default options are used, then ERRAT_ADR will be set by default
4813 which will enable the ADRP->ADR workaround for the erratum 843419
4814 workaround. */
4815 globals->fix_erratum_843419 = fix_erratum_843419;
4816 globals->no_apply_dynamic_relocs = no_apply_dynamic_relocs;
4817
4818 BFD_ASSERT (is_aarch64_elf (output_bfd));
4819 elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
4820 elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
4821
4822 switch (bp_info.bti_type)
4823 {
4824 case BTI_WARN:
4825 elf_aarch64_tdata (output_bfd)->no_bti_warn = 0;
4826 elf_aarch64_tdata (output_bfd)->gnu_and_prop
4827 |= GNU_PROPERTY_AARCH64_FEATURE_1_BTI;
4828 break;
4829
4830 default:
4831 break;
4832 }
4833 elf_aarch64_tdata (output_bfd)->plt_type = bp_info.plt_type;
4834 setup_plt_values (link_info, bp_info.plt_type);
4835 }
4836
4837 static bfd_vma
4838 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h,
4839 struct elf_aarch64_link_hash_table
4840 *globals, struct bfd_link_info *info,
4841 bfd_vma value, bfd *output_bfd,
4842 bool *unresolved_reloc_p)
4843 {
4844 bfd_vma off = (bfd_vma) - 1;
4845 asection *basegot = globals->root.sgot;
4846 bool dyn = globals->root.dynamic_sections_created;
4847
4848 if (h != NULL)
4849 {
4850 BFD_ASSERT (basegot != NULL);
4851 off = h->got.offset;
4852 BFD_ASSERT (off != (bfd_vma) - 1);
4853 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
4854 || (bfd_link_pic (info)
4855 && SYMBOL_REFERENCES_LOCAL (info, h))
4856 || (ELF_ST_VISIBILITY (h->other)
4857 && h->root.type == bfd_link_hash_undefweak))
4858 {
4859 /* This is actually a static link, or it is a -Bsymbolic link
4860 and the symbol is defined locally. We must initialize this
4861 entry in the global offset table. Since the offset must
4862 always be a multiple of 8 (4 in the case of ILP32), we use
4863 the least significant bit to record whether we have
4864 initialized it already.
4865 When doing a dynamic link, we create a .rel(a).got relocation
4866 entry to initialize the value. This is done in the
4867 finish_dynamic_symbol routine. */
4868 if ((off & 1) != 0)
4869 off &= ~1;
4870 else
4871 {
4872 bfd_put_NN (output_bfd, value, basegot->contents + off);
4873 h->got.offset |= 1;
4874 }
4875 }
4876 else
4877 *unresolved_reloc_p = false;
4878
4879 off = off + basegot->output_section->vma + basegot->output_offset;
4880 }
4881
4882 return off;
4883 }
4884
4885 /* Change R_TYPE to a more efficient access model where possible,
4886 return the new reloc type. */
4887
4888 static bfd_reloc_code_real_type
4889 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type,
4890 struct elf_link_hash_entry *h)
4891 {
4892 bool is_local = h == NULL;
4893
4894 switch (r_type)
4895 {
4896 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4897 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4898 return (is_local
4899 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4900 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21);
4901
4902 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4903 return (is_local
4904 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4905 : r_type);
4906
4907 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4908 return (is_local
4909 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4910 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
4911
4912 case BFD_RELOC_AARCH64_TLSDESC_LDR:
4913 return (is_local
4914 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4915 : BFD_RELOC_AARCH64_NONE);
4916
4917 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
4918 return (is_local
4919 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
4920 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC);
4921
4922 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
4923 return (is_local
4924 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
4925 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1);
4926
4927 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
4928 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4929 return (is_local
4930 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4931 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC);
4932
4933 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4934 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type;
4935
4936 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4937 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type;
4938
4939 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4940 return r_type;
4941
4942 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4943 return (is_local
4944 ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
4945 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
4946
4947 case BFD_RELOC_AARCH64_TLSDESC_ADD:
4948 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12:
4949 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4950 /* Instructions with these relocations will become NOPs. */
4951 return BFD_RELOC_AARCH64_NONE;
4952
4953 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
4954 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
4955 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
4956 return is_local ? BFD_RELOC_AARCH64_NONE : r_type;
4957
4958 #if ARCH_SIZE == 64
4959 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
4960 return is_local
4961 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
4962 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC;
4963
4964 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
4965 return is_local
4966 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
4967 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1;
4968 #endif
4969
4970 default:
4971 break;
4972 }
4973
4974 return r_type;
4975 }
4976
4977 static unsigned int
4978 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type)
4979 {
4980 switch (r_type)
4981 {
4982 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4983 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4984 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
4985 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4986 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
4987 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
4988 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4989 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC:
4990 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
4991 return GOT_NORMAL;
4992
4993 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4994 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4995 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4996 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
4997 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
4998 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
4999 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
5000 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
5001 return GOT_TLS_GD;
5002
5003 case BFD_RELOC_AARCH64_TLSDESC_ADD:
5004 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12:
5005 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5006 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5007 case BFD_RELOC_AARCH64_TLSDESC_CALL:
5008 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
5009 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12:
5010 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5011 case BFD_RELOC_AARCH64_TLSDESC_LDR:
5012 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
5013 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
5014 return GOT_TLSDESC_GD;
5015
5016 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5017 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
5018 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
5019 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5020 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC:
5021 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1:
5022 return GOT_TLS_IE;
5023
5024 default:
5025 break;
5026 }
5027 return GOT_UNKNOWN;
5028 }
5029
5030 static bool
5031 aarch64_can_relax_tls (bfd *input_bfd,
5032 struct bfd_link_info *info,
5033 bfd_reloc_code_real_type r_type,
5034 struct elf_link_hash_entry *h,
5035 unsigned long r_symndx)
5036 {
5037 unsigned int symbol_got_type;
5038 unsigned int reloc_got_type;
5039
5040 if (! IS_AARCH64_TLS_RELAX_RELOC (r_type))
5041 return false;
5042
5043 symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx);
5044 reloc_got_type = aarch64_reloc_got_type (r_type);
5045
5046 if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type))
5047 return true;
5048
5049 if (!bfd_link_executable (info))
5050 return false;
5051
5052 if (h && h->root.type == bfd_link_hash_undefweak)
5053 return false;
5054
5055 return true;
5056 }
5057
5058 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
5059 enumerator. */
5060
5061 static bfd_reloc_code_real_type
5062 aarch64_tls_transition (bfd *input_bfd,
5063 struct bfd_link_info *info,
5064 unsigned int r_type,
5065 struct elf_link_hash_entry *h,
5066 unsigned long r_symndx)
5067 {
5068 bfd_reloc_code_real_type bfd_r_type
5069 = elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type);
5070
5071 if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx))
5072 return bfd_r_type;
5073
5074 return aarch64_tls_transition_without_check (bfd_r_type, h);
5075 }
5076
5077 /* Return the base VMA address which should be subtracted from real addresses
5078 when resolving R_AARCH64_TLS_DTPREL relocation. */
5079
5080 static bfd_vma
5081 dtpoff_base (struct bfd_link_info *info)
5082 {
5083 /* If tls_sec is NULL, we should have signalled an error already. */
5084 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
5085 return elf_hash_table (info)->tls_sec->vma;
5086 }
5087
5088 /* Return the base VMA address which should be subtracted from real addresses
5089 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
5090
5091 static bfd_vma
5092 tpoff_base (struct bfd_link_info *info)
5093 {
5094 struct elf_link_hash_table *htab = elf_hash_table (info);
5095
5096 /* If tls_sec is NULL, we should have signalled an error already. */
5097 BFD_ASSERT (htab->tls_sec != NULL);
5098
5099 bfd_vma base = align_power ((bfd_vma) TCB_SIZE,
5100 htab->tls_sec->alignment_power);
5101 return htab->tls_sec->vma - base;
5102 }
5103
5104 static bfd_vma *
5105 symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
5106 unsigned long r_symndx)
5107 {
5108 /* Calculate the address of the GOT entry for symbol
5109 referred to in h. */
5110 if (h != NULL)
5111 return &h->got.offset;
5112 else
5113 {
5114 /* local symbol */
5115 struct elf_aarch64_local_symbol *l;
5116
5117 l = elf_aarch64_locals (input_bfd);
5118 return &l[r_symndx].got_offset;
5119 }
5120 }
5121
5122 static void
5123 symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
5124 unsigned long r_symndx)
5125 {
5126 bfd_vma *p;
5127 p = symbol_got_offset_ref (input_bfd, h, r_symndx);
5128 *p |= 1;
5129 }
5130
5131 static int
5132 symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h,
5133 unsigned long r_symndx)
5134 {
5135 bfd_vma value;
5136 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
5137 return value & 1;
5138 }
5139
5140 static bfd_vma
5141 symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
5142 unsigned long r_symndx)
5143 {
5144 bfd_vma value;
5145 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
5146 value &= ~1;
5147 return value;
5148 }
5149
5150 static bfd_vma *
5151 symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
5152 unsigned long r_symndx)
5153 {
5154 /* Calculate the address of the GOT entry for symbol
5155 referred to in h. */
5156 if (h != NULL)
5157 {
5158 struct elf_aarch64_link_hash_entry *eh;
5159 eh = (struct elf_aarch64_link_hash_entry *) h;
5160 return &eh->tlsdesc_got_jump_table_offset;
5161 }
5162 else
5163 {
5164 /* local symbol */
5165 struct elf_aarch64_local_symbol *l;
5166
5167 l = elf_aarch64_locals (input_bfd);
5168 return &l[r_symndx].tlsdesc_got_jump_table_offset;
5169 }
5170 }
5171
5172 static void
5173 symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
5174 unsigned long r_symndx)
5175 {
5176 bfd_vma *p;
5177 p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
5178 *p |= 1;
5179 }
5180
5181 static int
5182 symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd,
5183 struct elf_link_hash_entry *h,
5184 unsigned long r_symndx)
5185 {
5186 bfd_vma value;
5187 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
5188 return value & 1;
5189 }
5190
5191 static bfd_vma
5192 symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
5193 unsigned long r_symndx)
5194 {
5195 bfd_vma value;
5196 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
5197 value &= ~1;
5198 return value;
5199 }
5200
5201 /* Data for make_branch_to_erratum_835769_stub(). */
5202
5203 struct erratum_835769_branch_to_stub_data
5204 {
5205 struct bfd_link_info *info;
5206 asection *output_section;
5207 bfd_byte *contents;
5208 };
5209
5210 /* Helper to insert branches to erratum 835769 stubs in the right
5211 places for a particular section. */
5212
5213 static bool
5214 make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry,
5215 void *in_arg)
5216 {
5217 struct elf_aarch64_stub_hash_entry *stub_entry;
5218 struct erratum_835769_branch_to_stub_data *data;
5219 bfd_byte *contents;
5220 unsigned long branch_insn = 0;
5221 bfd_vma veneered_insn_loc, veneer_entry_loc;
5222 bfd_signed_vma branch_offset;
5223 unsigned int target;
5224 bfd *abfd;
5225
5226 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
5227 data = (struct erratum_835769_branch_to_stub_data *) in_arg;
5228
5229 if (stub_entry->target_section != data->output_section
5230 || stub_entry->stub_type != aarch64_stub_erratum_835769_veneer)
5231 return true;
5232
5233 contents = data->contents;
5234 veneered_insn_loc = stub_entry->target_section->output_section->vma
5235 + stub_entry->target_section->output_offset
5236 + stub_entry->target_value;
5237 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
5238 + stub_entry->stub_sec->output_offset
5239 + stub_entry->stub_offset;
5240 branch_offset = veneer_entry_loc - veneered_insn_loc;
5241
5242 abfd = stub_entry->target_section->owner;
5243 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
5244 _bfd_error_handler
5245 (_("%pB: error: erratum 835769 stub out "
5246 "of range (input file too large)"), abfd);
5247
5248 target = stub_entry->target_value;
5249 branch_insn = 0x14000000;
5250 branch_offset >>= 2;
5251 branch_offset &= 0x3ffffff;
5252 branch_insn |= branch_offset;
5253 bfd_putl32 (branch_insn, &contents[target]);
5254
5255 return true;
5256 }
5257
5258
5259 static bool
5260 _bfd_aarch64_erratum_843419_branch_to_stub (struct bfd_hash_entry *gen_entry,
5261 void *in_arg)
5262 {
5263 struct elf_aarch64_stub_hash_entry *stub_entry
5264 = (struct elf_aarch64_stub_hash_entry *) gen_entry;
5265 struct erratum_835769_branch_to_stub_data *data
5266 = (struct erratum_835769_branch_to_stub_data *) in_arg;
5267 struct bfd_link_info *info;
5268 struct elf_aarch64_link_hash_table *htab;
5269 bfd_byte *contents;
5270 asection *section;
5271 bfd *abfd;
5272 bfd_vma place;
5273 uint32_t insn;
5274
5275 info = data->info;
5276 contents = data->contents;
5277 section = data->output_section;
5278
5279 htab = elf_aarch64_hash_table (info);
5280
5281 if (stub_entry->target_section != section
5282 || stub_entry->stub_type != aarch64_stub_erratum_843419_veneer)
5283 return true;
5284
5285 BFD_ASSERT (((htab->fix_erratum_843419 & ERRAT_ADRP) && stub_entry->stub_sec)
5286 || (htab->fix_erratum_843419 & ERRAT_ADR));
5287
5288 /* Only update the stub section if we have one. We should always have one if
5289 we're allowed to use the ADRP errata workaround, otherwise it is not
5290 required. */
5291 if (stub_entry->stub_sec)
5292 {
5293 insn = bfd_getl32 (contents + stub_entry->target_value);
5294 bfd_putl32 (insn,
5295 stub_entry->stub_sec->contents + stub_entry->stub_offset);
5296 }
5297
5298 place = (section->output_section->vma + section->output_offset
5299 + stub_entry->adrp_offset);
5300 insn = bfd_getl32 (contents + stub_entry->adrp_offset);
5301
5302 if (!_bfd_aarch64_adrp_p (insn))
5303 abort ();
5304
5305 bfd_signed_vma imm =
5306 (_bfd_aarch64_sign_extend
5307 ((bfd_vma) _bfd_aarch64_decode_adrp_imm (insn) << 12, 33)
5308 - (place & 0xfff));
5309
5310 if ((htab->fix_erratum_843419 & ERRAT_ADR)
5311 && (imm >= AARCH64_MIN_ADRP_IMM && imm <= AARCH64_MAX_ADRP_IMM))
5312 {
5313 insn = (_bfd_aarch64_reencode_adr_imm (AARCH64_ADR_OP, imm)
5314 | AARCH64_RT (insn));
5315 bfd_putl32 (insn, contents + stub_entry->adrp_offset);
5316 /* Stub is not needed, don't map it out. */
5317 stub_entry->stub_type = aarch64_stub_none;
5318 }
5319 else if (htab->fix_erratum_843419 & ERRAT_ADRP)
5320 {
5321 bfd_vma veneered_insn_loc;
5322 bfd_vma veneer_entry_loc;
5323 bfd_signed_vma branch_offset;
5324 uint32_t branch_insn;
5325
5326 veneered_insn_loc = stub_entry->target_section->output_section->vma
5327 + stub_entry->target_section->output_offset
5328 + stub_entry->target_value;
5329 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
5330 + stub_entry->stub_sec->output_offset
5331 + stub_entry->stub_offset;
5332 branch_offset = veneer_entry_loc - veneered_insn_loc;
5333
5334 abfd = stub_entry->target_section->owner;
5335 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
5336 _bfd_error_handler
5337 (_("%pB: error: erratum 843419 stub out "
5338 "of range (input file too large)"), abfd);
5339
5340 branch_insn = 0x14000000;
5341 branch_offset >>= 2;
5342 branch_offset &= 0x3ffffff;
5343 branch_insn |= branch_offset;
5344 bfd_putl32 (branch_insn, contents + stub_entry->target_value);
5345 }
5346 else
5347 {
5348 char imm_buf[128];
5349
5350 sprintf (imm_buf, "%" BFD_VMA_FMT "x", imm);
5351 abfd = stub_entry->target_section->owner;
5352 _bfd_error_handler
5353 (_("%pB: error: erratum 843419 immediate 0x%s "
5354 "out of range for ADR (input file too large) and "
5355 "--fix-cortex-a53-843419=adr used. Run the linker with "
5356 "--fix-cortex-a53-843419=full instead"), abfd, imm_buf);
5357 bfd_set_error (bfd_error_bad_value);
5358 /* This function is called inside a hashtable traversal and the error
5359 handlers called above turn into non-fatal errors. Which means this
5360 case ld returns an exit code 0 and also produces a broken object file.
5361 To prevent this, issue a hard abort. */
5362 BFD_FAIL ();
5363 }
5364 return true;
5365 }
5366
5367
5368 static bool
5369 elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED,
5370 struct bfd_link_info *link_info,
5371 asection *sec,
5372 bfd_byte *contents)
5373
5374 {
5375 struct elf_aarch64_link_hash_table *globals =
5376 elf_aarch64_hash_table (link_info);
5377
5378 if (globals == NULL)
5379 return false;
5380
5381 /* Fix code to point to erratum 835769 stubs. */
5382 if (globals->fix_erratum_835769)
5383 {
5384 struct erratum_835769_branch_to_stub_data data;
5385
5386 data.info = link_info;
5387 data.output_section = sec;
5388 data.contents = contents;
5389 bfd_hash_traverse (&globals->stub_hash_table,
5390 make_branch_to_erratum_835769_stub, &data);
5391 }
5392
5393 if (globals->fix_erratum_843419)
5394 {
5395 struct erratum_835769_branch_to_stub_data data;
5396
5397 data.info = link_info;
5398 data.output_section = sec;
5399 data.contents = contents;
5400 bfd_hash_traverse (&globals->stub_hash_table,
5401 _bfd_aarch64_erratum_843419_branch_to_stub, &data);
5402 }
5403
5404 return false;
5405 }
5406
5407 /* Return TRUE if RELOC is a relocation against the base of GOT table. */
5408
5409 static bool
5410 aarch64_relocation_aginst_gp_p (bfd_reloc_code_real_type reloc)
5411 {
5412 return (reloc == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
5413 || reloc == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
5414 || reloc == BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
5415 || reloc == BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
5416 || reloc == BFD_RELOC_AARCH64_MOVW_GOTOFF_G1);
5417 }
5418
5419 /* Perform a relocation as part of a final link. The input relocation type
5420 should be TLS relaxed. */
5421
5422 static bfd_reloc_status_type
5423 elfNN_aarch64_final_link_relocate (reloc_howto_type *howto,
5424 bfd *input_bfd,
5425 bfd *output_bfd,
5426 asection *input_section,
5427 bfd_byte *contents,
5428 Elf_Internal_Rela *rel,
5429 bfd_vma value,
5430 struct bfd_link_info *info,
5431 asection *sym_sec,
5432 struct elf_link_hash_entry *h,
5433 bool *unresolved_reloc_p,
5434 bool save_addend,
5435 bfd_vma *saved_addend,
5436 Elf_Internal_Sym *sym)
5437 {
5438 Elf_Internal_Shdr *symtab_hdr;
5439 unsigned int r_type = howto->type;
5440 bfd_reloc_code_real_type bfd_r_type
5441 = elfNN_aarch64_bfd_reloc_from_howto (howto);
5442 unsigned long r_symndx;
5443 bfd_byte *hit_data = contents + rel->r_offset;
5444 bfd_vma place, off, got_entry_addr = 0;
5445 bfd_signed_vma signed_addend;
5446 struct elf_aarch64_link_hash_table *globals;
5447 bool weak_undef_p;
5448 bool relative_reloc;
5449 asection *base_got;
5450 bfd_vma orig_value = value;
5451 bool resolved_to_zero;
5452 bool abs_symbol_p;
5453
5454 globals = elf_aarch64_hash_table (info);
5455
5456 symtab_hdr = &elf_symtab_hdr (input_bfd);
5457
5458 BFD_ASSERT (is_aarch64_elf (input_bfd));
5459
5460 r_symndx = ELFNN_R_SYM (rel->r_info);
5461
5462 place = input_section->output_section->vma
5463 + input_section->output_offset + rel->r_offset;
5464
5465 /* Get addend, accumulating the addend for consecutive relocs
5466 which refer to the same offset. */
5467 signed_addend = saved_addend ? *saved_addend : 0;
5468 signed_addend += rel->r_addend;
5469
5470 weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak
5471 : bfd_is_und_section (sym_sec));
5472 abs_symbol_p = h != NULL && bfd_is_abs_symbol (&h->root);
5473
5474
5475 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
5476 it here if it is defined in a non-shared object. */
5477 if (h != NULL
5478 && h->type == STT_GNU_IFUNC
5479 && h->def_regular)
5480 {
5481 asection *plt;
5482 const char *name;
5483 bfd_vma addend = 0;
5484
5485 if ((input_section->flags & SEC_ALLOC) == 0)
5486 {
5487 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
5488 STT_GNU_IFUNC symbol as STT_FUNC. */
5489 if (elf_section_type (input_section) == SHT_NOTE)
5490 goto skip_ifunc;
5491
5492 /* Dynamic relocs are not propagated for SEC_DEBUGGING
5493 sections because such sections are not SEC_ALLOC and
5494 thus ld.so will not process them. */
5495 if ((input_section->flags & SEC_DEBUGGING) != 0)
5496 return bfd_reloc_ok;
5497
5498 if (h->root.root.string)
5499 name = h->root.root.string;
5500 else
5501 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, NULL);
5502 _bfd_error_handler
5503 /* xgettext:c-format */
5504 (_("%pB(%pA+%#" PRIx64 "): "
5505 "unresolvable %s relocation against symbol `%s'"),
5506 input_bfd, input_section, (uint64_t) rel->r_offset,
5507 howto->name, name);
5508 bfd_set_error (bfd_error_bad_value);
5509 return bfd_reloc_notsupported;
5510 }
5511 else if (h->plt.offset == (bfd_vma) -1)
5512 goto bad_ifunc_reloc;
5513
5514 /* STT_GNU_IFUNC symbol must go through PLT. */
5515 plt = globals->root.splt ? globals->root.splt : globals->root.iplt;
5516 value = (plt->output_section->vma + plt->output_offset + h->plt.offset);
5517
5518 switch (bfd_r_type)
5519 {
5520 default:
5521 bad_ifunc_reloc:
5522 if (h->root.root.string)
5523 name = h->root.root.string;
5524 else
5525 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
5526 NULL);
5527 _bfd_error_handler
5528 /* xgettext:c-format */
5529 (_("%pB: relocation %s against STT_GNU_IFUNC "
5530 "symbol `%s' isn't handled by %s"), input_bfd,
5531 howto->name, name, __FUNCTION__);
5532 bfd_set_error (bfd_error_bad_value);
5533 return bfd_reloc_notsupported;
5534
5535 case BFD_RELOC_AARCH64_NN:
5536 if (rel->r_addend != 0)
5537 {
5538 if (h->root.root.string)
5539 name = h->root.root.string;
5540 else
5541 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
5542 sym, NULL);
5543 _bfd_error_handler
5544 /* xgettext:c-format */
5545 (_("%pB: relocation %s against STT_GNU_IFUNC "
5546 "symbol `%s' has non-zero addend: %" PRId64),
5547 input_bfd, howto->name, name, (int64_t) rel->r_addend);
5548 bfd_set_error (bfd_error_bad_value);
5549 return bfd_reloc_notsupported;
5550 }
5551
5552 /* Generate dynamic relocation only when there is a
5553 non-GOT reference in a shared object. */
5554 if (bfd_link_pic (info) && h->non_got_ref)
5555 {
5556 Elf_Internal_Rela outrel;
5557 asection *sreloc;
5558
5559 /* Need a dynamic relocation to get the real function
5560 address. */
5561 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
5562 info,
5563 input_section,
5564 rel->r_offset);
5565 if (outrel.r_offset == (bfd_vma) -1
5566 || outrel.r_offset == (bfd_vma) -2)
5567 abort ();
5568
5569 outrel.r_offset += (input_section->output_section->vma
5570 + input_section->output_offset);
5571
5572 if (h->dynindx == -1
5573 || h->forced_local
5574 || bfd_link_executable (info))
5575 {
5576 /* This symbol is resolved locally. */
5577 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
5578 outrel.r_addend = (h->root.u.def.value
5579 + h->root.u.def.section->output_section->vma
5580 + h->root.u.def.section->output_offset);
5581 }
5582 else
5583 {
5584 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
5585 outrel.r_addend = 0;
5586 }
5587
5588 sreloc = globals->root.irelifunc;
5589 elf_append_rela (output_bfd, sreloc, &outrel);
5590
5591 /* If this reloc is against an external symbol, we
5592 do not want to fiddle with the addend. Otherwise,
5593 we need to include the symbol value so that it
5594 becomes an addend for the dynamic reloc. For an
5595 internal symbol, we have updated addend. */
5596 return bfd_reloc_ok;
5597 }
5598 /* FALLTHROUGH */
5599 case BFD_RELOC_AARCH64_CALL26:
5600 case BFD_RELOC_AARCH64_JUMP26:
5601 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
5602 place, value,
5603 signed_addend,
5604 weak_undef_p);
5605 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
5606 howto, value);
5607 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5608 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5609 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
5610 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5611 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
5612 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC:
5613 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
5614 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
5615 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5616 base_got = globals->root.sgot;
5617 off = h->got.offset;
5618
5619 if (base_got == NULL)
5620 abort ();
5621
5622 if (off == (bfd_vma) -1)
5623 {
5624 bfd_vma plt_index;
5625
5626 /* We can't use h->got.offset here to save state, or
5627 even just remember the offset, as finish_dynamic_symbol
5628 would use that as offset into .got. */
5629
5630 if (globals->root.splt != NULL)
5631 {
5632 plt_index = ((h->plt.offset - globals->plt_header_size) /
5633 globals->plt_entry_size);
5634 off = (plt_index + 3) * GOT_ENTRY_SIZE;
5635 base_got = globals->root.sgotplt;
5636 }
5637 else
5638 {
5639 plt_index = h->plt.offset / globals->plt_entry_size;
5640 off = plt_index * GOT_ENTRY_SIZE;
5641 base_got = globals->root.igotplt;
5642 }
5643
5644 if (h->dynindx == -1
5645 || h->forced_local
5646 || info->symbolic)
5647 {
5648 /* This references the local definition. We must
5649 initialize this entry in the global offset table.
5650 Since the offset must always be a multiple of 8,
5651 we use the least significant bit to record
5652 whether we have initialized it already.
5653
5654 When doing a dynamic link, we create a .rela.got
5655 relocation entry to initialize the value. This
5656 is done in the finish_dynamic_symbol routine. */
5657 if ((off & 1) != 0)
5658 off &= ~1;
5659 else
5660 {
5661 bfd_put_NN (output_bfd, value,
5662 base_got->contents + off);
5663 /* Note that this is harmless as -1 | 1 still is -1. */
5664 h->got.offset |= 1;
5665 }
5666 }
5667 value = (base_got->output_section->vma
5668 + base_got->output_offset + off);
5669 }
5670 else
5671 value = aarch64_calculate_got_entry_vma (h, globals, info,
5672 value, output_bfd,
5673 unresolved_reloc_p);
5674
5675 if (aarch64_relocation_aginst_gp_p (bfd_r_type))
5676 addend = (globals->root.sgot->output_section->vma
5677 + globals->root.sgot->output_offset);
5678
5679 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
5680 place, value,
5681 addend, weak_undef_p);
5682 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value);
5683 case BFD_RELOC_AARCH64_ADD_LO12:
5684 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5685 break;
5686 }
5687 }
5688
5689 skip_ifunc:
5690 resolved_to_zero = (h != NULL
5691 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
5692
5693 switch (bfd_r_type)
5694 {
5695 case BFD_RELOC_AARCH64_NONE:
5696 case BFD_RELOC_AARCH64_TLSDESC_ADD:
5697 case BFD_RELOC_AARCH64_TLSDESC_CALL:
5698 case BFD_RELOC_AARCH64_TLSDESC_LDR:
5699 *unresolved_reloc_p = false;
5700 return bfd_reloc_ok;
5701
5702 case BFD_RELOC_AARCH64_NN:
5703
5704 /* When generating a shared object or relocatable executable, these
5705 relocations are copied into the output file to be resolved at
5706 run time. */
5707 if (((bfd_link_pic (info)
5708 || globals->root.is_relocatable_executable)
5709 && (input_section->flags & SEC_ALLOC)
5710 && (h == NULL
5711 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5712 && !resolved_to_zero)
5713 || h->root.type != bfd_link_hash_undefweak))
5714 /* Or we are creating an executable, we may need to keep relocations
5715 for symbols satisfied by a dynamic library if we manage to avoid
5716 copy relocs for the symbol. */
5717 || (ELIMINATE_COPY_RELOCS
5718 && !bfd_link_pic (info)
5719 && h != NULL
5720 && (input_section->flags & SEC_ALLOC)
5721 && h->dynindx != -1
5722 && !h->non_got_ref
5723 && ((h->def_dynamic
5724 && !h->def_regular)
5725 || h->root.type == bfd_link_hash_undefweak
5726 || h->root.type == bfd_link_hash_undefined)))
5727 {
5728 Elf_Internal_Rela outrel;
5729 bfd_byte *loc;
5730 bool skip, relocate;
5731 asection *sreloc;
5732
5733 *unresolved_reloc_p = false;
5734
5735 skip = false;
5736 relocate = false;
5737
5738 outrel.r_addend = signed_addend;
5739 outrel.r_offset =
5740 _bfd_elf_section_offset (output_bfd, info, input_section,
5741 rel->r_offset);
5742 if (outrel.r_offset == (bfd_vma) - 1)
5743 skip = true;
5744 else if (outrel.r_offset == (bfd_vma) - 2)
5745 {
5746 skip = true;
5747 relocate = true;
5748 }
5749 else if (abs_symbol_p)
5750 {
5751 /* Local absolute symbol. */
5752 skip = (h->forced_local || (h->dynindx == -1));
5753 relocate = skip;
5754 }
5755
5756 outrel.r_offset += (input_section->output_section->vma
5757 + input_section->output_offset);
5758
5759 if (skip)
5760 memset (&outrel, 0, sizeof outrel);
5761 else if (h != NULL
5762 && h->dynindx != -1
5763 && (!bfd_link_pic (info)
5764 || !(bfd_link_pie (info) || SYMBOLIC_BIND (info, h))
5765 || !h->def_regular))
5766 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
5767 else
5768 {
5769 int symbol;
5770
5771 /* On SVR4-ish systems, the dynamic loader cannot
5772 relocate the text and data segments independently,
5773 so the symbol does not matter. */
5774 symbol = 0;
5775 relocate = !globals->no_apply_dynamic_relocs;
5776 outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE));
5777 outrel.r_addend += value;
5778 }
5779
5780 sreloc = elf_section_data (input_section)->sreloc;
5781 if (sreloc == NULL || sreloc->contents == NULL)
5782 return bfd_reloc_notsupported;
5783
5784 loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals);
5785 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
5786
5787 if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size)
5788 {
5789 /* Sanity to check that we have previously allocated
5790 sufficient space in the relocation section for the
5791 number of relocations we actually want to emit. */
5792 abort ();
5793 }
5794
5795 /* If this reloc is against an external symbol, we do not want to
5796 fiddle with the addend. Otherwise, we need to include the symbol
5797 value so that it becomes an addend for the dynamic reloc. */
5798 if (!relocate)
5799 return bfd_reloc_ok;
5800
5801 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5802 contents, rel->r_offset, value,
5803 signed_addend);
5804 }
5805 else
5806 value += signed_addend;
5807 break;
5808
5809 case BFD_RELOC_AARCH64_CALL26:
5810 case BFD_RELOC_AARCH64_JUMP26:
5811 {
5812 asection *splt = globals->root.splt;
5813 bool via_plt_p =
5814 splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1;
5815
5816 /* A call to an undefined weak symbol is converted to a jump to
5817 the next instruction unless a PLT entry will be created.
5818 The jump to the next instruction is optimized as a NOP.
5819 Do the same for local undefined symbols. */
5820 if (weak_undef_p && ! via_plt_p)
5821 {
5822 bfd_putl32 (INSN_NOP, hit_data);
5823 return bfd_reloc_ok;
5824 }
5825
5826 /* If the call goes through a PLT entry, make sure to
5827 check distance to the right destination address. */
5828 if (via_plt_p)
5829 value = (splt->output_section->vma
5830 + splt->output_offset + h->plt.offset);
5831
5832 /* Check if a stub has to be inserted because the destination
5833 is too far away. */
5834 struct elf_aarch64_stub_hash_entry *stub_entry = NULL;
5835
5836 /* If the branch destination is directed to plt stub, "value" will be
5837 the final destination, otherwise we should plus signed_addend, it may
5838 contain non-zero value, for example call to local function symbol
5839 which are turned into "sec_sym + sec_off", and sec_off is kept in
5840 signed_addend. */
5841 if (! aarch64_valid_branch_p (via_plt_p ? value : value + signed_addend,
5842 place))
5843 /* The target is out of reach, so redirect the branch to
5844 the local stub for this function. */
5845 stub_entry = elfNN_aarch64_get_stub_entry (input_section, sym_sec, h,
5846 rel, globals);
5847 if (stub_entry != NULL)
5848 {
5849 value = (stub_entry->stub_offset
5850 + stub_entry->stub_sec->output_offset
5851 + stub_entry->stub_sec->output_section->vma);
5852
5853 /* We have redirected the destination to stub entry address,
5854 so ignore any addend record in the original rela entry. */
5855 signed_addend = 0;
5856 }
5857 }
5858 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
5859 place, value,
5860 signed_addend, weak_undef_p);
5861 *unresolved_reloc_p = false;
5862 break;
5863
5864 case BFD_RELOC_AARCH64_16_PCREL:
5865 case BFD_RELOC_AARCH64_32_PCREL:
5866 case BFD_RELOC_AARCH64_64_PCREL:
5867 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
5868 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5869 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
5870 case BFD_RELOC_AARCH64_LD_LO19_PCREL:
5871 case BFD_RELOC_AARCH64_MOVW_PREL_G0:
5872 case BFD_RELOC_AARCH64_MOVW_PREL_G0_NC:
5873 case BFD_RELOC_AARCH64_MOVW_PREL_G1:
5874 case BFD_RELOC_AARCH64_MOVW_PREL_G1_NC:
5875 case BFD_RELOC_AARCH64_MOVW_PREL_G2:
5876 case BFD_RELOC_AARCH64_MOVW_PREL_G2_NC:
5877 case BFD_RELOC_AARCH64_MOVW_PREL_G3:
5878 if (bfd_link_pic (info)
5879 && (input_section->flags & SEC_ALLOC) != 0
5880 && (input_section->flags & SEC_READONLY) != 0
5881 && !SYMBOL_REFERENCES_LOCAL (info, h))
5882 {
5883 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
5884
5885 _bfd_error_handler
5886 /* xgettext:c-format */
5887 (_("%pB: relocation %s against symbol `%s' which may bind "
5888 "externally can not be used when making a shared object; "
5889 "recompile with -fPIC"),
5890 input_bfd, elfNN_aarch64_howto_table[howto_index].name,
5891 h->root.root.string);
5892 bfd_set_error (bfd_error_bad_value);
5893 return bfd_reloc_notsupported;
5894 }
5895 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
5896 place, value,
5897 signed_addend,
5898 weak_undef_p);
5899 break;
5900
5901 case BFD_RELOC_AARCH64_BRANCH19:
5902 case BFD_RELOC_AARCH64_TSTBR14:
5903 if (h && h->root.type == bfd_link_hash_undefined)
5904 {
5905 _bfd_error_handler
5906 /* xgettext:c-format */
5907 (_("%pB: conditional branch to undefined symbol `%s' "
5908 "not allowed"), input_bfd, h->root.root.string);
5909 bfd_set_error (bfd_error_bad_value);
5910 return bfd_reloc_notsupported;
5911 }
5912 /* Fall through. */
5913
5914 case BFD_RELOC_AARCH64_16:
5915 #if ARCH_SIZE == 64
5916 case BFD_RELOC_AARCH64_32:
5917 #endif
5918 case BFD_RELOC_AARCH64_ADD_LO12:
5919 case BFD_RELOC_AARCH64_LDST128_LO12:
5920 case BFD_RELOC_AARCH64_LDST16_LO12:
5921 case BFD_RELOC_AARCH64_LDST32_LO12:
5922 case BFD_RELOC_AARCH64_LDST64_LO12:
5923 case BFD_RELOC_AARCH64_LDST8_LO12:
5924 case BFD_RELOC_AARCH64_MOVW_G0:
5925 case BFD_RELOC_AARCH64_MOVW_G0_NC:
5926 case BFD_RELOC_AARCH64_MOVW_G0_S:
5927 case BFD_RELOC_AARCH64_MOVW_G1:
5928 case BFD_RELOC_AARCH64_MOVW_G1_NC:
5929 case BFD_RELOC_AARCH64_MOVW_G1_S:
5930 case BFD_RELOC_AARCH64_MOVW_G2:
5931 case BFD_RELOC_AARCH64_MOVW_G2_NC:
5932 case BFD_RELOC_AARCH64_MOVW_G2_S:
5933 case BFD_RELOC_AARCH64_MOVW_G3:
5934 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
5935 place, value,
5936 signed_addend, weak_undef_p);
5937 break;
5938
5939 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5940 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5941 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
5942 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5943 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
5944 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5945 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
5946 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC:
5947 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
5948 if (globals->root.sgot == NULL)
5949 BFD_ASSERT (h != NULL);
5950
5951 relative_reloc = false;
5952 if (h != NULL)
5953 {
5954 bfd_vma addend = 0;
5955
5956 /* If a symbol is not dynamic and is not undefined weak, bind it
5957 locally and generate a RELATIVE relocation under PIC mode.
5958
5959 NOTE: one symbol may be referenced by several relocations, we
5960 should only generate one RELATIVE relocation for that symbol.
5961 Therefore, check GOT offset mark first. */
5962 if (h->dynindx == -1
5963 && !h->forced_local
5964 && h->root.type != bfd_link_hash_undefweak
5965 && bfd_link_pic (info)
5966 && !symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5967 relative_reloc = true;
5968
5969 value = aarch64_calculate_got_entry_vma (h, globals, info, value,
5970 output_bfd,
5971 unresolved_reloc_p);
5972 /* Record the GOT entry address which will be used when generating
5973 RELATIVE relocation. */
5974 if (relative_reloc)
5975 got_entry_addr = value;
5976
5977 if (aarch64_relocation_aginst_gp_p (bfd_r_type))
5978 addend = (globals->root.sgot->output_section->vma
5979 + globals->root.sgot->output_offset);
5980 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
5981 place, value,
5982 addend, weak_undef_p);
5983 }
5984 else
5985 {
5986 bfd_vma addend = 0;
5987 struct elf_aarch64_local_symbol *locals
5988 = elf_aarch64_locals (input_bfd);
5989
5990 if (locals == NULL)
5991 {
5992 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
5993 _bfd_error_handler
5994 /* xgettext:c-format */
5995 (_("%pB: local symbol descriptor table be NULL when applying "
5996 "relocation %s against local symbol"),
5997 input_bfd, elfNN_aarch64_howto_table[howto_index].name);
5998 abort ();
5999 }
6000
6001 off = symbol_got_offset (input_bfd, h, r_symndx);
6002 base_got = globals->root.sgot;
6003 got_entry_addr = (base_got->output_section->vma
6004 + base_got->output_offset + off);
6005
6006 if (!symbol_got_offset_mark_p (input_bfd, h, r_symndx))
6007 {
6008 bfd_put_64 (output_bfd, value, base_got->contents + off);
6009
6010 /* For local symbol, we have done absolute relocation in static
6011 linking stage. While for shared library, we need to update the
6012 content of GOT entry according to the shared object's runtime
6013 base address. So, we need to generate a R_AARCH64_RELATIVE reloc
6014 for dynamic linker. */
6015 if (bfd_link_pic (info))
6016 relative_reloc = true;
6017
6018 symbol_got_offset_mark (input_bfd, h, r_symndx);
6019 }
6020
6021 /* Update the relocation value to GOT entry addr as we have transformed
6022 the direct data access into indirect data access through GOT. */
6023 value = got_entry_addr;
6024
6025 if (aarch64_relocation_aginst_gp_p (bfd_r_type))
6026 addend = base_got->output_section->vma + base_got->output_offset;
6027
6028 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
6029 place, value,
6030 addend, weak_undef_p);
6031 }
6032
6033 if (relative_reloc)
6034 {
6035 asection *s;
6036 Elf_Internal_Rela outrel;
6037
6038 s = globals->root.srelgot;
6039 if (s == NULL)
6040 abort ();
6041
6042 outrel.r_offset = got_entry_addr;
6043 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
6044 outrel.r_addend = orig_value;
6045 elf_append_rela (output_bfd, s, &outrel);
6046 }
6047 break;
6048
6049 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
6050 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
6051 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
6052 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
6053 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
6054 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
6055 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
6056 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
6057 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
6058 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
6059 if (globals->root.sgot == NULL)
6060 return bfd_reloc_notsupported;
6061
6062 value = (symbol_got_offset (input_bfd, h, r_symndx)
6063 + globals->root.sgot->output_section->vma
6064 + globals->root.sgot->output_offset);
6065
6066 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
6067 place, value,
6068 0, weak_undef_p);
6069 *unresolved_reloc_p = false;
6070 break;
6071
6072 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
6073 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
6074 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC:
6075 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1:
6076 if (globals->root.sgot == NULL)
6077 return bfd_reloc_notsupported;
6078
6079 value = symbol_got_offset (input_bfd, h, r_symndx);
6080 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
6081 place, value,
6082 0, weak_undef_p);
6083 *unresolved_reloc_p = false;
6084 break;
6085
6086 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12:
6087 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12:
6088 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC:
6089 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12:
6090 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC:
6091 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12:
6092 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC:
6093 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12:
6094 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC:
6095 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12:
6096 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC:
6097 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0:
6098 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC:
6099 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1:
6100 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC:
6101 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2:
6102 {
6103 if (!(weak_undef_p || elf_hash_table (info)->tls_sec))
6104 {
6105 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
6106 _bfd_error_handler
6107 /* xgettext:c-format */
6108 (_("%pB: TLS relocation %s against undefined symbol `%s'"),
6109 input_bfd, elfNN_aarch64_howto_table[howto_index].name,
6110 h->root.root.string);
6111 bfd_set_error (bfd_error_bad_value);
6112 return bfd_reloc_notsupported;
6113 }
6114
6115 bfd_vma def_value
6116 = weak_undef_p ? 0 : signed_addend - dtpoff_base (info);
6117 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
6118 place, value,
6119 def_value, weak_undef_p);
6120 break;
6121 }
6122
6123 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
6124 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
6125 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
6126 case BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12:
6127 case BFD_RELOC_AARCH64_TLSLE_LDST16_TPREL_LO12_NC:
6128 case BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12:
6129 case BFD_RELOC_AARCH64_TLSLE_LDST32_TPREL_LO12_NC:
6130 case BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12:
6131 case BFD_RELOC_AARCH64_TLSLE_LDST64_TPREL_LO12_NC:
6132 case BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12:
6133 case BFD_RELOC_AARCH64_TLSLE_LDST8_TPREL_LO12_NC:
6134 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
6135 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
6136 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
6137 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
6138 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
6139 {
6140 if (!(weak_undef_p || elf_hash_table (info)->tls_sec))
6141 {
6142 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
6143 _bfd_error_handler
6144 /* xgettext:c-format */
6145 (_("%pB: TLS relocation %s against undefined symbol `%s'"),
6146 input_bfd, elfNN_aarch64_howto_table[howto_index].name,
6147 h->root.root.string);
6148 bfd_set_error (bfd_error_bad_value);
6149 return bfd_reloc_notsupported;
6150 }
6151
6152 bfd_vma def_value
6153 = weak_undef_p ? 0 : signed_addend - tpoff_base (info);
6154 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
6155 place, value,
6156 def_value, weak_undef_p);
6157 *unresolved_reloc_p = false;
6158 break;
6159 }
6160
6161 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12:
6162 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
6163 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
6164 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
6165 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12:
6166 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
6167 if (globals->root.sgot == NULL)
6168 return bfd_reloc_notsupported;
6169 value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
6170 + globals->root.sgotplt->output_section->vma
6171 + globals->root.sgotplt->output_offset
6172 + globals->sgotplt_jump_table_size);
6173
6174 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
6175 place, value,
6176 0, weak_undef_p);
6177 *unresolved_reloc_p = false;
6178 break;
6179
6180 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
6181 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
6182 if (globals->root.sgot == NULL)
6183 return bfd_reloc_notsupported;
6184
6185 value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
6186 + globals->root.sgotplt->output_section->vma
6187 + globals->root.sgotplt->output_offset
6188 + globals->sgotplt_jump_table_size);
6189
6190 value -= (globals->root.sgot->output_section->vma
6191 + globals->root.sgot->output_offset);
6192
6193 value = _bfd_aarch64_elf_resolve_relocation (input_bfd, bfd_r_type,
6194 place, value,
6195 0, weak_undef_p);
6196 *unresolved_reloc_p = false;
6197 break;
6198
6199 default:
6200 return bfd_reloc_notsupported;
6201 }
6202
6203 if (saved_addend)
6204 *saved_addend = value;
6205
6206 /* Only apply the final relocation in a sequence. */
6207 if (save_addend)
6208 return bfd_reloc_continue;
6209
6210 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
6211 howto, value);
6212 }
6213
6214 /* LP64 and ILP32 operates on x- and w-registers respectively.
6215 Next definitions take into account the difference between
6216 corresponding machine codes. R means x-register if the target
6217 arch is LP64, and w-register if the target is ILP32. */
6218
6219 #if ARCH_SIZE == 64
6220 # define add_R0_R0 (0x91000000)
6221 # define add_R0_R0_R1 (0x8b000020)
6222 # define add_R0_R1 (0x91400020)
6223 # define ldr_R0 (0x58000000)
6224 # define ldr_R0_mask(i) (i & 0xffffffe0)
6225 # define ldr_R0_x0 (0xf9400000)
6226 # define ldr_hw_R0 (0xf2a00000)
6227 # define movk_R0 (0xf2800000)
6228 # define movz_R0 (0xd2a00000)
6229 # define movz_hw_R0 (0xd2c00000)
6230 #else /*ARCH_SIZE == 32 */
6231 # define add_R0_R0 (0x11000000)
6232 # define add_R0_R0_R1 (0x0b000020)
6233 # define add_R0_R1 (0x11400020)
6234 # define ldr_R0 (0x18000000)
6235 # define ldr_R0_mask(i) (i & 0xbfffffe0)
6236 # define ldr_R0_x0 (0xb9400000)
6237 # define ldr_hw_R0 (0x72a00000)
6238 # define movk_R0 (0x72800000)
6239 # define movz_R0 (0x52a00000)
6240 # define movz_hw_R0 (0x52c00000)
6241 #endif
6242
6243 /* Structure to hold payload for _bfd_aarch64_erratum_843419_clear_stub,
6244 it is used to identify the stub information to reset. */
6245
6246 struct erratum_843419_branch_to_stub_clear_data
6247 {
6248 bfd_vma adrp_offset;
6249 asection *output_section;
6250 };
6251
6252 /* Clear the erratum information for GEN_ENTRY if the ADRP_OFFSET and
6253 section inside IN_ARG matches. The clearing is done by setting the
6254 stub_type to none. */
6255
6256 static bool
6257 _bfd_aarch64_erratum_843419_clear_stub (struct bfd_hash_entry *gen_entry,
6258 void *in_arg)
6259 {
6260 struct elf_aarch64_stub_hash_entry *stub_entry
6261 = (struct elf_aarch64_stub_hash_entry *) gen_entry;
6262 struct erratum_843419_branch_to_stub_clear_data *data
6263 = (struct erratum_843419_branch_to_stub_clear_data *) in_arg;
6264
6265 if (stub_entry->target_section != data->output_section
6266 || stub_entry->stub_type != aarch64_stub_erratum_843419_veneer
6267 || stub_entry->adrp_offset != data->adrp_offset)
6268 return true;
6269
6270 /* Change the stub type instead of removing the entry, removing from the hash
6271 table would be slower and we have already reserved the memory for the entry
6272 so there wouldn't be much gain. Changing the stub also keeps around a
6273 record of what was there before. */
6274 stub_entry->stub_type = aarch64_stub_none;
6275
6276 /* We're done and there could have been only one matching stub at that
6277 particular offset, so abort further traversal. */
6278 return false;
6279 }
6280
6281 /* TLS Relaxations may relax an adrp sequence that matches the erratum 843419
6282 sequence. In this case the erratum no longer applies and we need to remove
6283 the entry from the pending stub generation. This clears matching adrp insn
6284 at ADRP_OFFSET in INPUT_SECTION in the stub table defined in GLOBALS. */
6285
6286 static void
6287 clear_erratum_843419_entry (struct elf_aarch64_link_hash_table *globals,
6288 bfd_vma adrp_offset, asection *input_section)
6289 {
6290 if (globals->fix_erratum_843419 & ERRAT_ADRP)
6291 {
6292 struct erratum_843419_branch_to_stub_clear_data data;
6293 data.adrp_offset = adrp_offset;
6294 data.output_section = input_section;
6295
6296 bfd_hash_traverse (&globals->stub_hash_table,
6297 _bfd_aarch64_erratum_843419_clear_stub, &data);
6298 }
6299 }
6300
6301 /* Handle TLS relaxations. Relaxing is possible for symbols that use
6302 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
6303 link.
6304
6305 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
6306 is to then call final_link_relocate. Return other values in the
6307 case of error. */
6308
6309 static bfd_reloc_status_type
6310 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals,
6311 bfd *input_bfd, asection *input_section,
6312 bfd_byte *contents, Elf_Internal_Rela *rel,
6313 struct elf_link_hash_entry *h)
6314 {
6315 bool is_local = h == NULL;
6316 unsigned int r_type = ELFNN_R_TYPE (rel->r_info);
6317 unsigned long insn;
6318
6319 BFD_ASSERT (globals && input_bfd && contents && rel);
6320
6321 switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type))
6322 {
6323 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
6324 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
6325 if (is_local)
6326 {
6327 /* GD->LE relaxation:
6328 adrp x0, :tlsgd:var => movz R0, :tprel_g1:var
6329 or
6330 adrp x0, :tlsdesc:var => movz R0, :tprel_g1:var
6331
6332 Where R is x for LP64, and w for ILP32. */
6333 bfd_putl32 (movz_R0, contents + rel->r_offset);
6334 /* We have relaxed the adrp into a mov, we may have to clear any
6335 pending erratum fixes. */
6336 clear_erratum_843419_entry (globals, rel->r_offset, input_section);
6337 return bfd_reloc_continue;
6338 }
6339 else
6340 {
6341 /* GD->IE relaxation:
6342 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
6343 or
6344 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
6345 */
6346 return bfd_reloc_continue;
6347 }
6348
6349 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
6350 BFD_ASSERT (0);
6351 break;
6352
6353 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
6354 if (is_local)
6355 {
6356 /* Tiny TLSDESC->LE relaxation:
6357 ldr x1, :tlsdesc:var => movz R0, #:tprel_g1:var
6358 adr x0, :tlsdesc:var => movk R0, #:tprel_g0_nc:var
6359 .tlsdesccall var
6360 blr x1 => nop
6361
6362 Where R is x for LP64, and w for ILP32. */
6363 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
6364 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
6365
6366 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
6367 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC));
6368 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6369
6370 bfd_putl32 (movz_R0, contents + rel->r_offset);
6371 bfd_putl32 (movk_R0, contents + rel->r_offset + 4);
6372 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
6373 return bfd_reloc_continue;
6374 }
6375 else
6376 {
6377 /* Tiny TLSDESC->IE relaxation:
6378 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
6379 adr x0, :tlsdesc:var => nop
6380 .tlsdesccall var
6381 blr x1 => nop
6382 */
6383 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
6384 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
6385
6386 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6387 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6388
6389 bfd_putl32 (ldr_R0, contents + rel->r_offset);
6390 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4);
6391 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
6392 return bfd_reloc_continue;
6393 }
6394
6395 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
6396 if (is_local)
6397 {
6398 /* Tiny GD->LE relaxation:
6399 adr x0, :tlsgd:var => mrs x1, tpidr_el0
6400 bl __tls_get_addr => add R0, R1, #:tprel_hi12:x, lsl #12
6401 nop => add R0, R0, #:tprel_lo12_nc:x
6402
6403 Where R is x for LP64, and x for Ilp32. */
6404
6405 /* First kill the tls_get_addr reloc on the bl instruction. */
6406 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
6407
6408 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 0);
6409 bfd_putl32 (add_R0_R1, contents + rel->r_offset + 4);
6410 bfd_putl32 (add_R0_R0, contents + rel->r_offset + 8);
6411
6412 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
6413 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC));
6414 rel[1].r_offset = rel->r_offset + 8;
6415
6416 /* Move the current relocation to the second instruction in
6417 the sequence. */
6418 rel->r_offset += 4;
6419 rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
6420 AARCH64_R (TLSLE_ADD_TPREL_HI12));
6421 return bfd_reloc_continue;
6422 }
6423 else
6424 {
6425 /* Tiny GD->IE relaxation:
6426 adr x0, :tlsgd:var => ldr R0, :gottprel:var
6427 bl __tls_get_addr => mrs x1, tpidr_el0
6428 nop => add R0, R0, R1
6429
6430 Where R is x for LP64, and w for Ilp32. */
6431
6432 /* First kill the tls_get_addr reloc on the bl instruction. */
6433 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
6434 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6435
6436 bfd_putl32 (ldr_R0, contents + rel->r_offset);
6437 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
6438 bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 8);
6439 return bfd_reloc_continue;
6440 }
6441
6442 #if ARCH_SIZE == 64
6443 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
6444 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSGD_MOVW_G0_NC));
6445 BFD_ASSERT (rel->r_offset + 12 == rel[2].r_offset);
6446 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (CALL26));
6447
6448 if (is_local)
6449 {
6450 /* Large GD->LE relaxation:
6451 movz x0, #:tlsgd_g1:var => movz x0, #:tprel_g2:var, lsl #32
6452 movk x0, #:tlsgd_g0_nc:var => movk x0, #:tprel_g1_nc:var, lsl #16
6453 add x0, gp, x0 => movk x0, #:tprel_g0_nc:var
6454 bl __tls_get_addr => mrs x1, tpidr_el0
6455 nop => add x0, x0, x1
6456 */
6457 rel[2].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
6458 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC));
6459 rel[2].r_offset = rel->r_offset + 8;
6460
6461 bfd_putl32 (movz_hw_R0, contents + rel->r_offset + 0);
6462 bfd_putl32 (ldr_hw_R0, contents + rel->r_offset + 4);
6463 bfd_putl32 (movk_R0, contents + rel->r_offset + 8);
6464 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 12);
6465 bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 16);
6466 }
6467 else
6468 {
6469 /* Large GD->IE relaxation:
6470 movz x0, #:tlsgd_g1:var => movz x0, #:gottprel_g1:var, lsl #16
6471 movk x0, #:tlsgd_g0_nc:var => movk x0, #:gottprel_g0_nc:var
6472 add x0, gp, x0 => ldr x0, [gp, x0]
6473 bl __tls_get_addr => mrs x1, tpidr_el0
6474 nop => add x0, x0, x1
6475 */
6476 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6477 bfd_putl32 (0xd2a80000, contents + rel->r_offset + 0);
6478 bfd_putl32 (ldr_R0, contents + rel->r_offset + 8);
6479 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 12);
6480 bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 16);
6481 }
6482 return bfd_reloc_continue;
6483
6484 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
6485 return bfd_reloc_continue;
6486 #endif
6487
6488 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
6489 return bfd_reloc_continue;
6490
6491 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
6492 if (is_local)
6493 {
6494 /* GD->LE relaxation:
6495 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
6496
6497 Where R is x for lp64 mode, and w for ILP32 mode. */
6498 bfd_putl32 (movk_R0, contents + rel->r_offset);
6499 return bfd_reloc_continue;
6500 }
6501 else
6502 {
6503 /* GD->IE relaxation:
6504 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr R0, [x0, #:gottprel_lo12:var]
6505
6506 Where R is x for lp64 mode, and w for ILP32 mode. */
6507 insn = bfd_getl32 (contents + rel->r_offset);
6508 bfd_putl32 (ldr_R0_mask (insn), contents + rel->r_offset);
6509 return bfd_reloc_continue;
6510 }
6511
6512 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
6513 if (is_local)
6514 {
6515 /* GD->LE relaxation
6516 add x0, #:tlsgd_lo12:var => movk R0, :tprel_g0_nc:var
6517 bl __tls_get_addr => mrs x1, tpidr_el0
6518 nop => add R0, R1, R0
6519
6520 Where R is x for lp64 mode, and w for ILP32 mode. */
6521
6522 /* First kill the tls_get_addr reloc on the bl instruction. */
6523 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
6524 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6525
6526 bfd_putl32 (movk_R0, contents + rel->r_offset);
6527 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
6528 bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 8);
6529 return bfd_reloc_continue;
6530 }
6531 else
6532 {
6533 /* GD->IE relaxation
6534 ADD x0, #:tlsgd_lo12:var => ldr R0, [x0, #:gottprel_lo12:var]
6535 BL __tls_get_addr => mrs x1, tpidr_el0
6536 R_AARCH64_CALL26
6537 NOP => add R0, R1, R0
6538
6539 Where R is x for lp64 mode, and w for ilp32 mode. */
6540
6541 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
6542
6543 /* Remove the relocation on the BL instruction. */
6544 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6545
6546 /* We choose to fixup the BL and NOP instructions using the
6547 offset from the second relocation to allow flexibility in
6548 scheduling instructions between the ADD and BL. */
6549 bfd_putl32 (ldr_R0_x0, contents + rel->r_offset);
6550 bfd_putl32 (0xd53bd041, contents + rel[1].r_offset);
6551 bfd_putl32 (add_R0_R0_R1, contents + rel[1].r_offset + 4);
6552 return bfd_reloc_continue;
6553 }
6554
6555 case BFD_RELOC_AARCH64_TLSDESC_ADD:
6556 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12:
6557 case BFD_RELOC_AARCH64_TLSDESC_CALL:
6558 /* GD->IE/LE relaxation:
6559 add x0, x0, #:tlsdesc_lo12:var => nop
6560 blr xd => nop
6561 */
6562 bfd_putl32 (INSN_NOP, contents + rel->r_offset);
6563 return bfd_reloc_ok;
6564
6565 case BFD_RELOC_AARCH64_TLSDESC_LDR:
6566 if (is_local)
6567 {
6568 /* GD->LE relaxation:
6569 ldr xd, [gp, xn] => movk R0, #:tprel_g0_nc:var
6570
6571 Where R is x for lp64 mode, and w for ILP32 mode. */
6572 bfd_putl32 (movk_R0, contents + rel->r_offset);
6573 return bfd_reloc_continue;
6574 }
6575 else
6576 {
6577 /* GD->IE relaxation:
6578 ldr xd, [gp, xn] => ldr R0, [gp, xn]
6579
6580 Where R is x for lp64 mode, and w for ILP32 mode. */
6581 insn = bfd_getl32 (contents + rel->r_offset);
6582 bfd_putl32 (ldr_R0_mask (insn), contents + rel->r_offset);
6583 return bfd_reloc_ok;
6584 }
6585
6586 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
6587 /* GD->LE relaxation:
6588 movk xd, #:tlsdesc_off_g0_nc:var => movk R0, #:tprel_g1_nc:var, lsl #16
6589 GD->IE relaxation:
6590 movk xd, #:tlsdesc_off_g0_nc:var => movk Rd, #:gottprel_g0_nc:var
6591
6592 Where R is x for lp64 mode, and w for ILP32 mode. */
6593 if (is_local)
6594 bfd_putl32 (ldr_hw_R0, contents + rel->r_offset);
6595 return bfd_reloc_continue;
6596
6597 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
6598 if (is_local)
6599 {
6600 /* GD->LE relaxation:
6601 movz xd, #:tlsdesc_off_g1:var => movz R0, #:tprel_g2:var, lsl #32
6602
6603 Where R is x for lp64 mode, and w for ILP32 mode. */
6604 bfd_putl32 (movz_hw_R0, contents + rel->r_offset);
6605 return bfd_reloc_continue;
6606 }
6607 else
6608 {
6609 /* GD->IE relaxation:
6610 movz xd, #:tlsdesc_off_g1:var => movz Rd, #:gottprel_g1:var, lsl #16
6611
6612 Where R is x for lp64 mode, and w for ILP32 mode. */
6613 insn = bfd_getl32 (contents + rel->r_offset);
6614 bfd_putl32 (movz_R0 | (insn & 0x1f), contents + rel->r_offset);
6615 return bfd_reloc_continue;
6616 }
6617
6618 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
6619 /* IE->LE relaxation:
6620 adrp xd, :gottprel:var => movz Rd, :tprel_g1:var
6621
6622 Where R is x for lp64 mode, and w for ILP32 mode. */
6623 if (is_local)
6624 {
6625 insn = bfd_getl32 (contents + rel->r_offset);
6626 bfd_putl32 (movz_R0 | (insn & 0x1f), contents + rel->r_offset);
6627 /* We have relaxed the adrp into a mov, we may have to clear any
6628 pending erratum fixes. */
6629 clear_erratum_843419_entry (globals, rel->r_offset, input_section);
6630 }
6631 return bfd_reloc_continue;
6632
6633 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
6634 /* IE->LE relaxation:
6635 ldr xd, [xm, #:gottprel_lo12:var] => movk Rd, :tprel_g0_nc:var
6636
6637 Where R is x for lp64 mode, and w for ILP32 mode. */
6638 if (is_local)
6639 {
6640 insn = bfd_getl32 (contents + rel->r_offset);
6641 bfd_putl32 (movk_R0 | (insn & 0x1f), contents + rel->r_offset);
6642 }
6643 return bfd_reloc_continue;
6644
6645 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
6646 /* LD->LE relaxation (tiny):
6647 adr x0, :tlsldm:x => mrs x0, tpidr_el0
6648 bl __tls_get_addr => add R0, R0, TCB_SIZE
6649
6650 Where R is x for lp64 mode, and w for ilp32 mode. */
6651 if (is_local)
6652 {
6653 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
6654 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
6655 /* No need of CALL26 relocation for tls_get_addr. */
6656 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6657 bfd_putl32 (0xd53bd040, contents + rel->r_offset + 0);
6658 bfd_putl32 (add_R0_R0 | (TCB_SIZE << 10),
6659 contents + rel->r_offset + 4);
6660 return bfd_reloc_ok;
6661 }
6662 return bfd_reloc_continue;
6663
6664 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
6665 /* LD->LE relaxation (small):
6666 adrp x0, :tlsldm:x => mrs x0, tpidr_el0
6667 */
6668 if (is_local)
6669 {
6670 bfd_putl32 (0xd53bd040, contents + rel->r_offset);
6671 return bfd_reloc_ok;
6672 }
6673 return bfd_reloc_continue;
6674
6675 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
6676 /* LD->LE relaxation (small):
6677 add x0, #:tlsldm_lo12:x => add R0, R0, TCB_SIZE
6678 bl __tls_get_addr => nop
6679
6680 Where R is x for lp64 mode, and w for ilp32 mode. */
6681 if (is_local)
6682 {
6683 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
6684 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
6685 /* No need of CALL26 relocation for tls_get_addr. */
6686 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
6687 bfd_putl32 (add_R0_R0 | (TCB_SIZE << 10),
6688 contents + rel->r_offset + 0);
6689 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4);
6690 return bfd_reloc_ok;
6691 }
6692 return bfd_reloc_continue;
6693
6694 default:
6695 return bfd_reloc_continue;
6696 }
6697
6698 return bfd_reloc_ok;
6699 }
6700
6701 /* Relocate an AArch64 ELF section. */
6702
6703 static int
6704 elfNN_aarch64_relocate_section (bfd *output_bfd,
6705 struct bfd_link_info *info,
6706 bfd *input_bfd,
6707 asection *input_section,
6708 bfd_byte *contents,
6709 Elf_Internal_Rela *relocs,
6710 Elf_Internal_Sym *local_syms,
6711 asection **local_sections)
6712 {
6713 Elf_Internal_Shdr *symtab_hdr;
6714 struct elf_link_hash_entry **sym_hashes;
6715 Elf_Internal_Rela *rel;
6716 Elf_Internal_Rela *relend;
6717 const char *name;
6718 struct elf_aarch64_link_hash_table *globals;
6719 bool save_addend = false;
6720 bfd_vma addend = 0;
6721
6722 globals = elf_aarch64_hash_table (info);
6723
6724 symtab_hdr = &elf_symtab_hdr (input_bfd);
6725 sym_hashes = elf_sym_hashes (input_bfd);
6726
6727 rel = relocs;
6728 relend = relocs + input_section->reloc_count;
6729 for (; rel < relend; rel++)
6730 {
6731 unsigned int r_type;
6732 bfd_reloc_code_real_type bfd_r_type;
6733 bfd_reloc_code_real_type relaxed_bfd_r_type;
6734 reloc_howto_type *howto;
6735 unsigned long r_symndx;
6736 Elf_Internal_Sym *sym;
6737 asection *sec;
6738 struct elf_link_hash_entry *h;
6739 bfd_vma relocation;
6740 bfd_reloc_status_type r;
6741 arelent bfd_reloc;
6742 char sym_type;
6743 bool unresolved_reloc = false;
6744 char *error_message = NULL;
6745
6746 r_symndx = ELFNN_R_SYM (rel->r_info);
6747 r_type = ELFNN_R_TYPE (rel->r_info);
6748
6749 bfd_reloc.howto = elfNN_aarch64_howto_from_type (input_bfd, r_type);
6750 howto = bfd_reloc.howto;
6751
6752 if (howto == NULL)
6753 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
6754
6755 bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto);
6756
6757 h = NULL;
6758 sym = NULL;
6759 sec = NULL;
6760
6761 if (r_symndx < symtab_hdr->sh_info)
6762 {
6763 sym = local_syms + r_symndx;
6764 sym_type = ELFNN_ST_TYPE (sym->st_info);
6765 sec = local_sections[r_symndx];
6766
6767 /* An object file might have a reference to a local
6768 undefined symbol. This is a daft object file, but we
6769 should at least do something about it. */
6770 if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL
6771 && bfd_is_und_section (sec)
6772 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
6773 (*info->callbacks->undefined_symbol)
6774 (info, bfd_elf_string_from_elf_section
6775 (input_bfd, symtab_hdr->sh_link, sym->st_name),
6776 input_bfd, input_section, rel->r_offset, true);
6777
6778 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6779
6780 /* Relocate against local STT_GNU_IFUNC symbol. */
6781 if (!bfd_link_relocatable (info)
6782 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
6783 {
6784 h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd,
6785 rel, false);
6786 if (h == NULL)
6787 abort ();
6788
6789 /* Set STT_GNU_IFUNC symbol value. */
6790 h->root.u.def.value = sym->st_value;
6791 h->root.u.def.section = sec;
6792 }
6793 }
6794 else
6795 {
6796 bool warned, ignored;
6797
6798 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6799 r_symndx, symtab_hdr, sym_hashes,
6800 h, sec, relocation,
6801 unresolved_reloc, warned, ignored);
6802
6803 sym_type = h->type;
6804 }
6805
6806 if (sec != NULL && discarded_section (sec))
6807 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
6808 rel, 1, relend, howto, 0, contents);
6809
6810 if (bfd_link_relocatable (info))
6811 continue;
6812
6813 if (h != NULL)
6814 name = h->root.root.string;
6815 else
6816 {
6817 name = (bfd_elf_string_from_elf_section
6818 (input_bfd, symtab_hdr->sh_link, sym->st_name));
6819 if (name == NULL || *name == '\0')
6820 name = bfd_section_name (sec);
6821 }
6822
6823 if (r_symndx != 0
6824 && r_type != R_AARCH64_NONE
6825 && r_type != R_AARCH64_NULL
6826 && (h == NULL
6827 || h->root.type == bfd_link_hash_defined
6828 || h->root.type == bfd_link_hash_defweak)
6829 && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS))
6830 {
6831 _bfd_error_handler
6832 ((sym_type == STT_TLS
6833 /* xgettext:c-format */
6834 ? _("%pB(%pA+%#" PRIx64 "): %s used with TLS symbol %s")
6835 /* xgettext:c-format */
6836 : _("%pB(%pA+%#" PRIx64 "): %s used with non-TLS symbol %s")),
6837 input_bfd,
6838 input_section, (uint64_t) rel->r_offset, howto->name, name);
6839 }
6840
6841 /* We relax only if we can see that there can be a valid transition
6842 from a reloc type to another.
6843 We call elfNN_aarch64_final_link_relocate unless we're completely
6844 done, i.e., the relaxation produced the final output we want. */
6845
6846 relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type,
6847 h, r_symndx);
6848 if (relaxed_bfd_r_type != bfd_r_type)
6849 {
6850 bfd_r_type = relaxed_bfd_r_type;
6851 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
6852 BFD_ASSERT (howto != NULL);
6853 r_type = howto->type;
6854 r = elfNN_aarch64_tls_relax (globals, input_bfd, input_section,
6855 contents, rel, h);
6856 unresolved_reloc = 0;
6857 }
6858 else
6859 r = bfd_reloc_continue;
6860
6861 /* There may be multiple consecutive relocations for the
6862 same offset. In that case we are supposed to treat the
6863 output of each relocation as the addend for the next. */
6864 if (rel + 1 < relend
6865 && rel->r_offset == rel[1].r_offset
6866 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE
6867 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL)
6868 save_addend = true;
6869 else
6870 save_addend = false;
6871
6872 if (r == bfd_reloc_continue)
6873 r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd,
6874 input_section, contents, rel,
6875 relocation, info, sec,
6876 h, &unresolved_reloc,
6877 save_addend, &addend, sym);
6878
6879 switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type))
6880 {
6881 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
6882 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
6883 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
6884 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
6885 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
6886 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
6887 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
6888 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
6889 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
6890 {
6891 bool need_relocs = false;
6892 bfd_byte *loc;
6893 int indx;
6894 bfd_vma off;
6895
6896 off = symbol_got_offset (input_bfd, h, r_symndx);
6897 indx = h && h->dynindx != -1 ? h->dynindx : 0;
6898
6899 need_relocs =
6900 (!bfd_link_executable (info) || indx != 0) &&
6901 (h == NULL
6902 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6903 || h->root.type != bfd_link_hash_undefweak);
6904
6905 BFD_ASSERT (globals->root.srelgot != NULL);
6906
6907 if (need_relocs)
6908 {
6909 Elf_Internal_Rela rela;
6910 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD));
6911 rela.r_addend = 0;
6912 rela.r_offset = globals->root.sgot->output_section->vma +
6913 globals->root.sgot->output_offset + off;
6914
6915
6916 loc = globals->root.srelgot->contents;
6917 loc += globals->root.srelgot->reloc_count++
6918 * RELOC_SIZE (htab);
6919 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6920
6921 bfd_reloc_code_real_type real_type =
6922 elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type);
6923
6924 if (real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
6925 || real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
6926 || real_type == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC)
6927 {
6928 /* For local dynamic, don't generate DTPREL in any case.
6929 Initialize the DTPREL slot into zero, so we get module
6930 base address when invoke runtime TLS resolver. */
6931 bfd_put_NN (output_bfd, 0,
6932 globals->root.sgot->contents + off
6933 + GOT_ENTRY_SIZE);
6934 }
6935 else if (indx == 0)
6936 {
6937 bfd_put_NN (output_bfd,
6938 relocation - dtpoff_base (info),
6939 globals->root.sgot->contents + off
6940 + GOT_ENTRY_SIZE);
6941 }
6942 else
6943 {
6944 /* This TLS symbol is global. We emit a
6945 relocation to fixup the tls offset at load
6946 time. */
6947 rela.r_info =
6948 ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL));
6949 rela.r_addend = 0;
6950 rela.r_offset =
6951 (globals->root.sgot->output_section->vma
6952 + globals->root.sgot->output_offset + off
6953 + GOT_ENTRY_SIZE);
6954
6955 loc = globals->root.srelgot->contents;
6956 loc += globals->root.srelgot->reloc_count++
6957 * RELOC_SIZE (globals);
6958 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6959 bfd_put_NN (output_bfd, (bfd_vma) 0,
6960 globals->root.sgot->contents + off
6961 + GOT_ENTRY_SIZE);
6962 }
6963 }
6964 else
6965 {
6966 bfd_put_NN (output_bfd, (bfd_vma) 1,
6967 globals->root.sgot->contents + off);
6968 bfd_put_NN (output_bfd,
6969 relocation - dtpoff_base (info),
6970 globals->root.sgot->contents + off
6971 + GOT_ENTRY_SIZE);
6972 }
6973
6974 symbol_got_offset_mark (input_bfd, h, r_symndx);
6975 }
6976 break;
6977
6978 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
6979 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
6980 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
6981 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC:
6982 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1:
6983 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
6984 {
6985 bool need_relocs = false;
6986 bfd_byte *loc;
6987 int indx;
6988 bfd_vma off;
6989
6990 off = symbol_got_offset (input_bfd, h, r_symndx);
6991
6992 indx = h && h->dynindx != -1 ? h->dynindx : 0;
6993
6994 need_relocs =
6995 (!bfd_link_executable (info) || indx != 0) &&
6996 (h == NULL
6997 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6998 || h->root.type != bfd_link_hash_undefweak);
6999
7000 BFD_ASSERT (globals->root.srelgot != NULL);
7001
7002 if (need_relocs)
7003 {
7004 Elf_Internal_Rela rela;
7005
7006 if (indx == 0)
7007 rela.r_addend = relocation - dtpoff_base (info);
7008 else
7009 rela.r_addend = 0;
7010
7011 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL));
7012 rela.r_offset = globals->root.sgot->output_section->vma +
7013 globals->root.sgot->output_offset + off;
7014
7015 loc = globals->root.srelgot->contents;
7016 loc += globals->root.srelgot->reloc_count++
7017 * RELOC_SIZE (htab);
7018
7019 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
7020
7021 bfd_put_NN (output_bfd, rela.r_addend,
7022 globals->root.sgot->contents + off);
7023 }
7024 else
7025 bfd_put_NN (output_bfd, relocation - tpoff_base (info),
7026 globals->root.sgot->contents + off);
7027
7028 symbol_got_offset_mark (input_bfd, h, r_symndx);
7029 }
7030 break;
7031
7032 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12:
7033 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
7034 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
7035 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
7036 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
7037 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
7038 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
7039 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx))
7040 {
7041 bool need_relocs = false;
7042 int indx = h && h->dynindx != -1 ? h->dynindx : 0;
7043 bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx);
7044
7045 need_relocs = (h == NULL
7046 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7047 || h->root.type != bfd_link_hash_undefweak);
7048
7049 BFD_ASSERT (globals->root.srelgot != NULL);
7050 BFD_ASSERT (globals->root.sgot != NULL);
7051
7052 if (need_relocs)
7053 {
7054 bfd_byte *loc;
7055 Elf_Internal_Rela rela;
7056 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC));
7057
7058 rela.r_addend = 0;
7059 rela.r_offset = (globals->root.sgotplt->output_section->vma
7060 + globals->root.sgotplt->output_offset
7061 + off + globals->sgotplt_jump_table_size);
7062
7063 if (indx == 0)
7064 rela.r_addend = relocation - dtpoff_base (info);
7065
7066 /* Allocate the next available slot in the PLT reloc
7067 section to hold our R_AARCH64_TLSDESC, the next
7068 available slot is determined from reloc_count,
7069 which we step. But note, reloc_count was
7070 artifically moved down while allocating slots for
7071 real PLT relocs such that all of the PLT relocs
7072 will fit above the initial reloc_count and the
7073 extra stuff will fit below. */
7074 loc = globals->root.srelplt->contents;
7075 loc += globals->root.srelplt->reloc_count++
7076 * RELOC_SIZE (globals);
7077
7078 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
7079
7080 bfd_put_NN (output_bfd, (bfd_vma) 0,
7081 globals->root.sgotplt->contents + off +
7082 globals->sgotplt_jump_table_size);
7083 bfd_put_NN (output_bfd, (bfd_vma) 0,
7084 globals->root.sgotplt->contents + off +
7085 globals->sgotplt_jump_table_size +
7086 GOT_ENTRY_SIZE);
7087 }
7088
7089 symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx);
7090 }
7091 break;
7092 default:
7093 break;
7094 }
7095
7096 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
7097 because such sections are not SEC_ALLOC and thus ld.so will
7098 not process them. */
7099 if (unresolved_reloc
7100 && !((input_section->flags & SEC_DEBUGGING) != 0
7101 && h->def_dynamic)
7102 && _bfd_elf_section_offset (output_bfd, info, input_section,
7103 +rel->r_offset) != (bfd_vma) - 1)
7104 {
7105 _bfd_error_handler
7106 /* xgettext:c-format */
7107 (_("%pB(%pA+%#" PRIx64 "): "
7108 "unresolvable %s relocation against symbol `%s'"),
7109 input_bfd, input_section, (uint64_t) rel->r_offset, howto->name,
7110 h->root.root.string);
7111 return false;
7112 }
7113
7114 if (r != bfd_reloc_ok && r != bfd_reloc_continue)
7115 {
7116 bfd_reloc_code_real_type real_r_type
7117 = elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type);
7118
7119 switch (r)
7120 {
7121 case bfd_reloc_overflow:
7122 (*info->callbacks->reloc_overflow)
7123 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
7124 input_bfd, input_section, rel->r_offset);
7125 if (real_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
7126 || real_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14)
7127 {
7128 (*info->callbacks->warning)
7129 (info,
7130 _("too many GOT entries for -fpic, "
7131 "please recompile with -fPIC"),
7132 name, input_bfd, input_section, rel->r_offset);
7133 return false;
7134 }
7135 /* Overflow can occur when a variable is referenced with a type
7136 that has a larger alignment than the type with which it was
7137 declared. eg:
7138 file1.c: extern int foo; int a (void) { return foo; }
7139 file2.c: char bar, foo, baz;
7140 If the variable is placed into a data section at an offset
7141 that is incompatible with the larger alignment requirement
7142 overflow will occur. (Strictly speaking this is not overflow
7143 but rather an alignment problem, but the bfd_reloc_ error
7144 enum does not have a value to cover that situation).
7145
7146 Try to catch this situation here and provide a more helpful
7147 error message to the user. */
7148 if (addend & (((bfd_vma) 1 << howto->rightshift) - 1)
7149 /* FIXME: Are we testing all of the appropriate reloc
7150 types here ? */
7151 && (real_r_type == BFD_RELOC_AARCH64_LD_LO19_PCREL
7152 || real_r_type == BFD_RELOC_AARCH64_LDST16_LO12
7153 || real_r_type == BFD_RELOC_AARCH64_LDST32_LO12
7154 || real_r_type == BFD_RELOC_AARCH64_LDST64_LO12
7155 || real_r_type == BFD_RELOC_AARCH64_LDST128_LO12))
7156 {
7157 info->callbacks->warning
7158 (info, _("one possible cause of this error is that the \
7159 symbol is being referenced in the indicated code as if it had a larger \
7160 alignment than was declared where it was defined"),
7161 name, input_bfd, input_section, rel->r_offset);
7162 }
7163 break;
7164
7165 case bfd_reloc_undefined:
7166 (*info->callbacks->undefined_symbol)
7167 (info, name, input_bfd, input_section, rel->r_offset, true);
7168 break;
7169
7170 case bfd_reloc_outofrange:
7171 error_message = _("out of range");
7172 goto common_error;
7173
7174 case bfd_reloc_notsupported:
7175 error_message = _("unsupported relocation");
7176 goto common_error;
7177
7178 case bfd_reloc_dangerous:
7179 /* error_message should already be set. */
7180 goto common_error;
7181
7182 default:
7183 error_message = _("unknown error");
7184 /* Fall through. */
7185
7186 common_error:
7187 BFD_ASSERT (error_message != NULL);
7188 (*info->callbacks->reloc_dangerous)
7189 (info, error_message, input_bfd, input_section, rel->r_offset);
7190 break;
7191 }
7192 }
7193
7194 if (!save_addend)
7195 addend = 0;
7196 }
7197
7198 return true;
7199 }
7200
7201 /* Set the right machine number. */
7202
7203 static bool
7204 elfNN_aarch64_object_p (bfd *abfd)
7205 {
7206 #if ARCH_SIZE == 32
7207 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32);
7208 #else
7209 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64);
7210 #endif
7211 return true;
7212 }
7213
7214 /* Function to keep AArch64 specific flags in the ELF header. */
7215
7216 static bool
7217 elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags)
7218 {
7219 if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags)
7220 {
7221 }
7222 else
7223 {
7224 elf_elfheader (abfd)->e_flags = flags;
7225 elf_flags_init (abfd) = true;
7226 }
7227
7228 return true;
7229 }
7230
7231 /* Merge backend specific data from an object file to the output
7232 object file when linking. */
7233
7234 static bool
7235 elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
7236 {
7237 bfd *obfd = info->output_bfd;
7238 flagword out_flags;
7239 flagword in_flags;
7240 bool flags_compatible = true;
7241 asection *sec;
7242
7243 /* Check if we have the same endianess. */
7244 if (!_bfd_generic_verify_endian_match (ibfd, info))
7245 return false;
7246
7247 if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd))
7248 return true;
7249
7250 /* The input BFD must have had its flags initialised. */
7251 /* The following seems bogus to me -- The flags are initialized in
7252 the assembler but I don't think an elf_flags_init field is
7253 written into the object. */
7254 /* BFD_ASSERT (elf_flags_init (ibfd)); */
7255
7256 in_flags = elf_elfheader (ibfd)->e_flags;
7257 out_flags = elf_elfheader (obfd)->e_flags;
7258
7259 if (!elf_flags_init (obfd))
7260 {
7261 /* If the input is the default architecture and had the default
7262 flags then do not bother setting the flags for the output
7263 architecture, instead allow future merges to do this. If no
7264 future merges ever set these flags then they will retain their
7265 uninitialised values, which surprise surprise, correspond
7266 to the default values. */
7267 if (bfd_get_arch_info (ibfd)->the_default
7268 && elf_elfheader (ibfd)->e_flags == 0)
7269 return true;
7270
7271 elf_flags_init (obfd) = true;
7272 elf_elfheader (obfd)->e_flags = in_flags;
7273
7274 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
7275 && bfd_get_arch_info (obfd)->the_default)
7276 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
7277 bfd_get_mach (ibfd));
7278
7279 return true;
7280 }
7281
7282 /* Identical flags must be compatible. */
7283 if (in_flags == out_flags)
7284 return true;
7285
7286 /* Check to see if the input BFD actually contains any sections. If
7287 not, its flags may not have been initialised either, but it
7288 cannot actually cause any incompatiblity. Do not short-circuit
7289 dynamic objects; their section list may be emptied by
7290 elf_link_add_object_symbols.
7291
7292 Also check to see if there are no code sections in the input.
7293 In this case there is no need to check for code specific flags.
7294 XXX - do we need to worry about floating-point format compatability
7295 in data sections ? */
7296 if (!(ibfd->flags & DYNAMIC))
7297 {
7298 bool null_input_bfd = true;
7299 bool only_data_sections = true;
7300
7301 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
7302 {
7303 if ((bfd_section_flags (sec)
7304 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
7305 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
7306 only_data_sections = false;
7307
7308 null_input_bfd = false;
7309 break;
7310 }
7311
7312 if (null_input_bfd || only_data_sections)
7313 return true;
7314 }
7315
7316 return flags_compatible;
7317 }
7318
7319 /* Display the flags field. */
7320
7321 static bool
7322 elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr)
7323 {
7324 FILE *file = (FILE *) ptr;
7325 unsigned long flags;
7326
7327 BFD_ASSERT (abfd != NULL && ptr != NULL);
7328
7329 /* Print normal ELF private data. */
7330 _bfd_elf_print_private_bfd_data (abfd, ptr);
7331
7332 flags = elf_elfheader (abfd)->e_flags;
7333 /* Ignore init flag - it may not be set, despite the flags field
7334 containing valid data. */
7335
7336 /* xgettext:c-format */
7337 fprintf (file, _("private flags = 0x%lx:"), elf_elfheader (abfd)->e_flags);
7338
7339 if (flags)
7340 fprintf (file, _(" <Unrecognised flag bits set>"));
7341
7342 fputc ('\n', file);
7343
7344 return true;
7345 }
7346
7347 /* Return true if we need copy relocation against EH. */
7348
7349 static bool
7350 need_copy_relocation_p (struct elf_aarch64_link_hash_entry *eh)
7351 {
7352 struct elf_dyn_relocs *p;
7353 asection *s;
7354
7355 for (p = eh->root.dyn_relocs; p != NULL; p = p->next)
7356 {
7357 /* If there is any pc-relative reference, we need to keep copy relocation
7358 to avoid propagating the relocation into runtime that current glibc
7359 does not support. */
7360 if (p->pc_count)
7361 return true;
7362
7363 s = p->sec->output_section;
7364 /* Need copy relocation if it's against read-only section. */
7365 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7366 return true;
7367 }
7368
7369 return false;
7370 }
7371
7372 /* Adjust a symbol defined by a dynamic object and referenced by a
7373 regular object. The current definition is in some section of the
7374 dynamic object, but we're not including those sections. We have to
7375 change the definition to something the rest of the link can
7376 understand. */
7377
7378 static bool
7379 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info,
7380 struct elf_link_hash_entry *h)
7381 {
7382 struct elf_aarch64_link_hash_table *htab;
7383 asection *s, *srel;
7384
7385 /* If this is a function, put it in the procedure linkage table. We
7386 will fill in the contents of the procedure linkage table later,
7387 when we know the address of the .got section. */
7388 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
7389 {
7390 if (h->plt.refcount <= 0
7391 || (h->type != STT_GNU_IFUNC
7392 && (SYMBOL_CALLS_LOCAL (info, h)
7393 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
7394 && h->root.type == bfd_link_hash_undefweak))))
7395 {
7396 /* This case can occur if we saw a CALL26 reloc in
7397 an input file, but the symbol wasn't referred to
7398 by a dynamic object or all references were
7399 garbage collected. In which case we can end up
7400 resolving. */
7401 h->plt.offset = (bfd_vma) - 1;
7402 h->needs_plt = 0;
7403 }
7404
7405 return true;
7406 }
7407 else
7408 /* Otherwise, reset to -1. */
7409 h->plt.offset = (bfd_vma) - 1;
7410
7411
7412 /* If this is a weak symbol, and there is a real definition, the
7413 processor independent code will have arranged for us to see the
7414 real definition first, and we can just use the same value. */
7415 if (h->is_weakalias)
7416 {
7417 struct elf_link_hash_entry *def = weakdef (h);
7418 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
7419 h->root.u.def.section = def->root.u.def.section;
7420 h->root.u.def.value = def->root.u.def.value;
7421 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
7422 h->non_got_ref = def->non_got_ref;
7423 return true;
7424 }
7425
7426 /* If we are creating a shared library, we must presume that the
7427 only references to the symbol are via the global offset table.
7428 For such cases we need not do anything here; the relocations will
7429 be handled correctly by relocate_section. */
7430 if (bfd_link_pic (info))
7431 return true;
7432
7433 /* If there are no references to this symbol that do not use the
7434 GOT, we don't need to generate a copy reloc. */
7435 if (!h->non_got_ref)
7436 return true;
7437
7438 /* If -z nocopyreloc was given, we won't generate them either. */
7439 if (info->nocopyreloc)
7440 {
7441 h->non_got_ref = 0;
7442 return true;
7443 }
7444
7445 if (ELIMINATE_COPY_RELOCS)
7446 {
7447 struct elf_aarch64_link_hash_entry *eh;
7448 /* If we don't find any dynamic relocs in read-only sections, then
7449 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
7450 eh = (struct elf_aarch64_link_hash_entry *) h;
7451 if (!need_copy_relocation_p (eh))
7452 {
7453 h->non_got_ref = 0;
7454 return true;
7455 }
7456 }
7457
7458 /* We must allocate the symbol in our .dynbss section, which will
7459 become part of the .bss section of the executable. There will be
7460 an entry for this symbol in the .dynsym section. The dynamic
7461 object will contain position independent code, so all references
7462 from the dynamic object to this symbol will go through the global
7463 offset table. The dynamic linker will use the .dynsym entry to
7464 determine the address it must put in the global offset table, so
7465 both the dynamic object and the regular object will refer to the
7466 same memory location for the variable. */
7467
7468 htab = elf_aarch64_hash_table (info);
7469
7470 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
7471 to copy the initial value out of the dynamic object and into the
7472 runtime process image. */
7473 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
7474 {
7475 s = htab->root.sdynrelro;
7476 srel = htab->root.sreldynrelro;
7477 }
7478 else
7479 {
7480 s = htab->root.sdynbss;
7481 srel = htab->root.srelbss;
7482 }
7483 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
7484 {
7485 srel->size += RELOC_SIZE (htab);
7486 h->needs_copy = 1;
7487 }
7488
7489 return _bfd_elf_adjust_dynamic_copy (info, h, s);
7490
7491 }
7492
7493 static bool
7494 elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number)
7495 {
7496 struct elf_aarch64_local_symbol *locals;
7497 locals = elf_aarch64_locals (abfd);
7498 if (locals == NULL)
7499 {
7500 locals = (struct elf_aarch64_local_symbol *)
7501 bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol));
7502 if (locals == NULL)
7503 return false;
7504 elf_aarch64_locals (abfd) = locals;
7505 }
7506 return true;
7507 }
7508
7509 /* Create the .got section to hold the global offset table. */
7510
7511 static bool
7512 aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
7513 {
7514 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
7515 flagword flags;
7516 asection *s;
7517 struct elf_link_hash_entry *h;
7518 struct elf_link_hash_table *htab = elf_hash_table (info);
7519
7520 /* This function may be called more than once. */
7521 if (htab->sgot != NULL)
7522 return true;
7523
7524 flags = bed->dynamic_sec_flags;
7525
7526 s = bfd_make_section_anyway_with_flags (abfd,
7527 (bed->rela_plts_and_copies_p
7528 ? ".rela.got" : ".rel.got"),
7529 (bed->dynamic_sec_flags
7530 | SEC_READONLY));
7531 if (s == NULL
7532 || !bfd_set_section_alignment (s, bed->s->log_file_align))
7533 return false;
7534 htab->srelgot = s;
7535
7536 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
7537 if (s == NULL
7538 || !bfd_set_section_alignment (s, bed->s->log_file_align))
7539 return false;
7540 htab->sgot = s;
7541 htab->sgot->size += GOT_ENTRY_SIZE;
7542
7543 if (bed->want_got_sym)
7544 {
7545 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
7546 (or .got.plt) section. We don't do this in the linker script
7547 because we don't want to define the symbol if we are not creating
7548 a global offset table. */
7549 h = _bfd_elf_define_linkage_sym (abfd, info, s,
7550 "_GLOBAL_OFFSET_TABLE_");
7551 elf_hash_table (info)->hgot = h;
7552 if (h == NULL)
7553 return false;
7554 }
7555
7556 if (bed->want_got_plt)
7557 {
7558 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
7559 if (s == NULL
7560 || !bfd_set_section_alignment (s, bed->s->log_file_align))
7561 return false;
7562 htab->sgotplt = s;
7563 }
7564
7565 /* The first bit of the global offset table is the header. */
7566 s->size += bed->got_header_size;
7567
7568 return true;
7569 }
7570
7571 /* Look through the relocs for a section during the first phase. */
7572
7573 static bool
7574 elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
7575 asection *sec, const Elf_Internal_Rela *relocs)
7576 {
7577 Elf_Internal_Shdr *symtab_hdr;
7578 struct elf_link_hash_entry **sym_hashes;
7579 const Elf_Internal_Rela *rel;
7580 const Elf_Internal_Rela *rel_end;
7581 asection *sreloc;
7582
7583 struct elf_aarch64_link_hash_table *htab;
7584
7585 if (bfd_link_relocatable (info))
7586 return true;
7587
7588 BFD_ASSERT (is_aarch64_elf (abfd));
7589
7590 htab = elf_aarch64_hash_table (info);
7591 sreloc = NULL;
7592
7593 symtab_hdr = &elf_symtab_hdr (abfd);
7594 sym_hashes = elf_sym_hashes (abfd);
7595
7596 rel_end = relocs + sec->reloc_count;
7597 for (rel = relocs; rel < rel_end; rel++)
7598 {
7599 struct elf_link_hash_entry *h;
7600 unsigned int r_symndx;
7601 unsigned int r_type;
7602 bfd_reloc_code_real_type bfd_r_type;
7603 Elf_Internal_Sym *isym;
7604
7605 r_symndx = ELFNN_R_SYM (rel->r_info);
7606 r_type = ELFNN_R_TYPE (rel->r_info);
7607
7608 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
7609 {
7610 /* xgettext:c-format */
7611 _bfd_error_handler (_("%pB: bad symbol index: %d"), abfd, r_symndx);
7612 return false;
7613 }
7614
7615 if (r_symndx < symtab_hdr->sh_info)
7616 {
7617 /* A local symbol. */
7618 isym = bfd_sym_from_r_symndx (&htab->root.sym_cache,
7619 abfd, r_symndx);
7620 if (isym == NULL)
7621 return false;
7622
7623 /* Check relocation against local STT_GNU_IFUNC symbol. */
7624 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
7625 {
7626 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel,
7627 true);
7628 if (h == NULL)
7629 return false;
7630
7631 /* Fake a STT_GNU_IFUNC symbol. */
7632 h->type = STT_GNU_IFUNC;
7633 h->def_regular = 1;
7634 h->ref_regular = 1;
7635 h->forced_local = 1;
7636 h->root.type = bfd_link_hash_defined;
7637 }
7638 else
7639 h = NULL;
7640 }
7641 else
7642 {
7643 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
7644 while (h->root.type == bfd_link_hash_indirect
7645 || h->root.type == bfd_link_hash_warning)
7646 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7647 }
7648
7649 /* Could be done earlier, if h were already available. */
7650 bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx);
7651
7652 if (h != NULL)
7653 {
7654 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
7655 This shows up in particular in an R_AARCH64_PREL64 in large model
7656 when calculating the pc-relative address to .got section which is
7657 used to initialize the gp register. */
7658 if (h->root.root.string
7659 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
7660 {
7661 if (htab->root.dynobj == NULL)
7662 htab->root.dynobj = abfd;
7663
7664 if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
7665 return false;
7666
7667 BFD_ASSERT (h == htab->root.hgot);
7668 }
7669
7670 /* Create the ifunc sections for static executables. If we
7671 never see an indirect function symbol nor we are building
7672 a static executable, those sections will be empty and
7673 won't appear in output. */
7674 switch (bfd_r_type)
7675 {
7676 default:
7677 break;
7678
7679 case BFD_RELOC_AARCH64_ADD_LO12:
7680 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
7681 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
7682 case BFD_RELOC_AARCH64_CALL26:
7683 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
7684 case BFD_RELOC_AARCH64_JUMP26:
7685 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
7686 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
7687 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
7688 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
7689 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
7690 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC:
7691 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
7692 case BFD_RELOC_AARCH64_NN:
7693 if (htab->root.dynobj == NULL)
7694 htab->root.dynobj = abfd;
7695 if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info))
7696 return false;
7697 break;
7698 }
7699
7700 /* It is referenced by a non-shared object. */
7701 h->ref_regular = 1;
7702 }
7703
7704 switch (bfd_r_type)
7705 {
7706 case BFD_RELOC_AARCH64_16:
7707 #if ARCH_SIZE == 64
7708 case BFD_RELOC_AARCH64_32:
7709 #endif
7710 if (bfd_link_pic (info) && (sec->flags & SEC_ALLOC) != 0)
7711 {
7712 if (h != NULL
7713 /* This is an absolute symbol. It represents a value instead
7714 of an address. */
7715 && (bfd_is_abs_symbol (&h->root)
7716 /* This is an undefined symbol. */
7717 || h->root.type == bfd_link_hash_undefined))
7718 break;
7719
7720 /* For local symbols, defined global symbols in a non-ABS section,
7721 it is assumed that the value is an address. */
7722 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
7723 _bfd_error_handler
7724 /* xgettext:c-format */
7725 (_("%pB: relocation %s against `%s' can not be used when making "
7726 "a shared object"),
7727 abfd, elfNN_aarch64_howto_table[howto_index].name,
7728 (h) ? h->root.root.string : "a local symbol");
7729 bfd_set_error (bfd_error_bad_value);
7730 return false;
7731 }
7732 else
7733 break;
7734
7735 case BFD_RELOC_AARCH64_MOVW_G0_NC:
7736 case BFD_RELOC_AARCH64_MOVW_G1_NC:
7737 case BFD_RELOC_AARCH64_MOVW_G2_NC:
7738 case BFD_RELOC_AARCH64_MOVW_G3:
7739 if (bfd_link_pic (info))
7740 {
7741 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
7742 _bfd_error_handler
7743 /* xgettext:c-format */
7744 (_("%pB: relocation %s against `%s' can not be used when making "
7745 "a shared object; recompile with -fPIC"),
7746 abfd, elfNN_aarch64_howto_table[howto_index].name,
7747 (h) ? h->root.root.string : "a local symbol");
7748 bfd_set_error (bfd_error_bad_value);
7749 return false;
7750 }
7751 /* Fall through. */
7752
7753 case BFD_RELOC_AARCH64_16_PCREL:
7754 case BFD_RELOC_AARCH64_32_PCREL:
7755 case BFD_RELOC_AARCH64_64_PCREL:
7756 case BFD_RELOC_AARCH64_ADD_LO12:
7757 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
7758 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
7759 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
7760 case BFD_RELOC_AARCH64_LDST128_LO12:
7761 case BFD_RELOC_AARCH64_LDST16_LO12:
7762 case BFD_RELOC_AARCH64_LDST32_LO12:
7763 case BFD_RELOC_AARCH64_LDST64_LO12:
7764 case BFD_RELOC_AARCH64_LDST8_LO12:
7765 case BFD_RELOC_AARCH64_LD_LO19_PCREL:
7766 if (h == NULL || bfd_link_pic (info))
7767 break;
7768 /* Fall through. */
7769
7770 case BFD_RELOC_AARCH64_NN:
7771
7772 /* We don't need to handle relocs into sections not going into
7773 the "real" output. */
7774 if ((sec->flags & SEC_ALLOC) == 0)
7775 break;
7776
7777 if (h != NULL)
7778 {
7779 if (!bfd_link_pic (info))
7780 h->non_got_ref = 1;
7781
7782 h->plt.refcount += 1;
7783 h->pointer_equality_needed = 1;
7784 }
7785
7786 /* No need to do anything if we're not creating a shared
7787 object. */
7788 if (!(bfd_link_pic (info)
7789 /* If on the other hand, we are creating an executable, we
7790 may need to keep relocations for symbols satisfied by a
7791 dynamic library if we manage to avoid copy relocs for the
7792 symbol.
7793
7794 NOTE: Currently, there is no support of copy relocs
7795 elimination on pc-relative relocation types, because there is
7796 no dynamic relocation support for them in glibc. We still
7797 record the dynamic symbol reference for them. This is
7798 because one symbol may be referenced by both absolute
7799 relocation (for example, BFD_RELOC_AARCH64_NN) and
7800 pc-relative relocation. We need full symbol reference
7801 information to make correct decision later in
7802 elfNN_aarch64_adjust_dynamic_symbol. */
7803 || (ELIMINATE_COPY_RELOCS
7804 && !bfd_link_pic (info)
7805 && h != NULL
7806 && (h->root.type == bfd_link_hash_defweak
7807 || !h->def_regular))))
7808 break;
7809
7810 {
7811 struct elf_dyn_relocs *p;
7812 struct elf_dyn_relocs **head;
7813 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
7814
7815 /* We must copy these reloc types into the output file.
7816 Create a reloc section in dynobj and make room for
7817 this reloc. */
7818 if (sreloc == NULL)
7819 {
7820 if (htab->root.dynobj == NULL)
7821 htab->root.dynobj = abfd;
7822
7823 sreloc = _bfd_elf_make_dynamic_reloc_section
7824 (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ true);
7825
7826 if (sreloc == NULL)
7827 return false;
7828 }
7829
7830 /* If this is a global symbol, we count the number of
7831 relocations we need for this symbol. */
7832 if (h != NULL)
7833 {
7834 head = &h->dyn_relocs;
7835 }
7836 else
7837 {
7838 /* Track dynamic relocs needed for local syms too.
7839 We really need local syms available to do this
7840 easily. Oh well. */
7841
7842 asection *s;
7843 void **vpp;
7844
7845 isym = bfd_sym_from_r_symndx (&htab->root.sym_cache,
7846 abfd, r_symndx);
7847 if (isym == NULL)
7848 return false;
7849
7850 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
7851 if (s == NULL)
7852 s = sec;
7853
7854 /* Beware of type punned pointers vs strict aliasing
7855 rules. */
7856 vpp = &(elf_section_data (s)->local_dynrel);
7857 head = (struct elf_dyn_relocs **) vpp;
7858 }
7859
7860 p = *head;
7861 if (p == NULL || p->sec != sec)
7862 {
7863 size_t amt = sizeof *p;
7864 p = ((struct elf_dyn_relocs *)
7865 bfd_zalloc (htab->root.dynobj, amt));
7866 if (p == NULL)
7867 return false;
7868 p->next = *head;
7869 *head = p;
7870 p->sec = sec;
7871 }
7872
7873 p->count += 1;
7874
7875 if (elfNN_aarch64_howto_table[howto_index].pc_relative)
7876 p->pc_count += 1;
7877 }
7878 break;
7879
7880 /* RR: We probably want to keep a consistency check that
7881 there are no dangling GOT_PAGE relocs. */
7882 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
7883 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
7884 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
7885 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
7886 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
7887 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
7888 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
7889 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC:
7890 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
7891 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12:
7892 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
7893 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
7894 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
7895 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12:
7896 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
7897 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
7898 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
7899 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
7900 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
7901 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
7902 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
7903 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1:
7904 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
7905 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
7906 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
7907 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
7908 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC:
7909 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1:
7910 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
7911 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
7912 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
7913 {
7914 unsigned got_type;
7915 unsigned old_got_type;
7916
7917 got_type = aarch64_reloc_got_type (bfd_r_type);
7918
7919 if (h)
7920 {
7921 h->got.refcount += 1;
7922 old_got_type = elf_aarch64_hash_entry (h)->got_type;
7923 }
7924 else
7925 {
7926 struct elf_aarch64_local_symbol *locals;
7927
7928 if (!elfNN_aarch64_allocate_local_symbols
7929 (abfd, symtab_hdr->sh_info))
7930 return false;
7931
7932 locals = elf_aarch64_locals (abfd);
7933 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
7934 locals[r_symndx].got_refcount += 1;
7935 old_got_type = locals[r_symndx].got_type;
7936 }
7937
7938 /* If a variable is accessed with both general dynamic TLS
7939 methods, two slots may be created. */
7940 if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type))
7941 got_type |= old_got_type;
7942
7943 /* We will already have issued an error message if there
7944 is a TLS/non-TLS mismatch, based on the symbol type.
7945 So just combine any TLS types needed. */
7946 if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL
7947 && got_type != GOT_NORMAL)
7948 got_type |= old_got_type;
7949
7950 /* If the symbol is accessed by both IE and GD methods, we
7951 are able to relax. Turn off the GD flag, without
7952 messing up with any other kind of TLS types that may be
7953 involved. */
7954 if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type))
7955 got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD);
7956
7957 if (old_got_type != got_type)
7958 {
7959 if (h != NULL)
7960 elf_aarch64_hash_entry (h)->got_type = got_type;
7961 else
7962 {
7963 struct elf_aarch64_local_symbol *locals;
7964 locals = elf_aarch64_locals (abfd);
7965 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
7966 locals[r_symndx].got_type = got_type;
7967 }
7968 }
7969
7970 if (htab->root.dynobj == NULL)
7971 htab->root.dynobj = abfd;
7972 if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
7973 return false;
7974 break;
7975 }
7976
7977 case BFD_RELOC_AARCH64_CALL26:
7978 case BFD_RELOC_AARCH64_JUMP26:
7979 /* If this is a local symbol then we resolve it
7980 directly without creating a PLT entry. */
7981 if (h == NULL)
7982 continue;
7983
7984 h->needs_plt = 1;
7985 if (h->plt.refcount <= 0)
7986 h->plt.refcount = 1;
7987 else
7988 h->plt.refcount += 1;
7989 break;
7990
7991 default:
7992 break;
7993 }
7994 }
7995
7996 return true;
7997 }
7998
7999 /* Treat mapping symbols as special target symbols. */
8000
8001 static bool
8002 elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED,
8003 asymbol *sym)
8004 {
8005 return bfd_is_aarch64_special_symbol_name (sym->name,
8006 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY);
8007 }
8008
8009 /* If the ELF symbol SYM might be a function in SEC, return the
8010 function size and set *CODE_OFF to the function's entry point,
8011 otherwise return zero. */
8012
8013 static bfd_size_type
8014 elfNN_aarch64_maybe_function_sym (const asymbol *sym, asection *sec,
8015 bfd_vma *code_off)
8016 {
8017 bfd_size_type size;
8018 elf_symbol_type * elf_sym = (elf_symbol_type *) sym;
8019
8020 if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT
8021 | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0
8022 || sym->section != sec)
8023 return 0;
8024
8025 size = (sym->flags & BSF_SYNTHETIC) ? 0 : elf_sym->internal_elf_sym.st_size;
8026
8027 if (!(sym->flags & BSF_SYNTHETIC))
8028 switch (ELF_ST_TYPE (elf_sym->internal_elf_sym.st_info))
8029 {
8030 case STT_NOTYPE:
8031 /* Ignore symbols created by the annobin plugin for gcc and clang.
8032 These symbols are hidden, local, notype and have a size of 0. */
8033 if (size == 0
8034 && sym->flags & BSF_LOCAL
8035 && ELF_ST_VISIBILITY (elf_sym->internal_elf_sym.st_other) == STV_HIDDEN)
8036 return 0;
8037 /* Fall through. */
8038 case STT_FUNC:
8039 /* FIXME: Allow STT_GNU_IFUNC as well ? */
8040 break;
8041 default:
8042 return 0;
8043 }
8044
8045 if ((sym->flags & BSF_LOCAL)
8046 && bfd_is_aarch64_special_symbol_name (sym->name,
8047 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY))
8048 return 0;
8049
8050 *code_off = sym->value;
8051
8052 /* Do not return 0 for the function's size. */
8053 return size ? size : 1;
8054 }
8055
8056 static bool
8057 elfNN_aarch64_find_inliner_info (bfd *abfd,
8058 const char **filename_ptr,
8059 const char **functionname_ptr,
8060 unsigned int *line_ptr)
8061 {
8062 bool found;
8063 found = _bfd_dwarf2_find_inliner_info
8064 (abfd, filename_ptr,
8065 functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info);
8066 return found;
8067 }
8068
8069
8070 static bool
8071 elfNN_aarch64_init_file_header (bfd *abfd, struct bfd_link_info *link_info)
8072 {
8073 Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
8074
8075 if (!_bfd_elf_init_file_header (abfd, link_info))
8076 return false;
8077
8078 i_ehdrp = elf_elfheader (abfd);
8079 i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION;
8080 return true;
8081 }
8082
8083 static enum elf_reloc_type_class
8084 elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
8085 const asection *rel_sec ATTRIBUTE_UNUSED,
8086 const Elf_Internal_Rela *rela)
8087 {
8088 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
8089
8090 if (htab->root.dynsym != NULL
8091 && htab->root.dynsym->contents != NULL)
8092 {
8093 /* Check relocation against STT_GNU_IFUNC symbol if there are
8094 dynamic symbols. */
8095 bfd *abfd = info->output_bfd;
8096 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
8097 unsigned long r_symndx = ELFNN_R_SYM (rela->r_info);
8098 if (r_symndx != STN_UNDEF)
8099 {
8100 Elf_Internal_Sym sym;
8101 if (!bed->s->swap_symbol_in (abfd,
8102 (htab->root.dynsym->contents
8103 + r_symndx * bed->s->sizeof_sym),
8104 0, &sym))
8105 {
8106 /* xgettext:c-format */
8107 _bfd_error_handler (_("%pB symbol number %lu references"
8108 " nonexistent SHT_SYMTAB_SHNDX section"),
8109 abfd, r_symndx);
8110 /* Ideally an error class should be returned here. */
8111 }
8112 else if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
8113 return reloc_class_ifunc;
8114 }
8115 }
8116
8117 switch ((int) ELFNN_R_TYPE (rela->r_info))
8118 {
8119 case AARCH64_R (IRELATIVE):
8120 return reloc_class_ifunc;
8121 case AARCH64_R (RELATIVE):
8122 return reloc_class_relative;
8123 case AARCH64_R (JUMP_SLOT):
8124 return reloc_class_plt;
8125 case AARCH64_R (COPY):
8126 return reloc_class_copy;
8127 default:
8128 return reloc_class_normal;
8129 }
8130 }
8131
8132 /* Handle an AArch64 specific section when reading an object file. This is
8133 called when bfd_section_from_shdr finds a section with an unknown
8134 type. */
8135
8136 static bool
8137 elfNN_aarch64_section_from_shdr (bfd *abfd,
8138 Elf_Internal_Shdr *hdr,
8139 const char *name, int shindex)
8140 {
8141 /* There ought to be a place to keep ELF backend specific flags, but
8142 at the moment there isn't one. We just keep track of the
8143 sections by their name, instead. Fortunately, the ABI gives
8144 names for all the AArch64 specific sections, so we will probably get
8145 away with this. */
8146 switch (hdr->sh_type)
8147 {
8148 case SHT_AARCH64_ATTRIBUTES:
8149 break;
8150
8151 default:
8152 return false;
8153 }
8154
8155 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
8156 return false;
8157
8158 return true;
8159 }
8160
8161 /* A structure used to record a list of sections, independently
8162 of the next and prev fields in the asection structure. */
8163 typedef struct section_list
8164 {
8165 asection *sec;
8166 struct section_list *next;
8167 struct section_list *prev;
8168 }
8169 section_list;
8170
8171 /* Unfortunately we need to keep a list of sections for which
8172 an _aarch64_elf_section_data structure has been allocated. This
8173 is because it is possible for functions like elfNN_aarch64_write_section
8174 to be called on a section which has had an elf_data_structure
8175 allocated for it (and so the used_by_bfd field is valid) but
8176 for which the AArch64 extended version of this structure - the
8177 _aarch64_elf_section_data structure - has not been allocated. */
8178 static section_list *sections_with_aarch64_elf_section_data = NULL;
8179
8180 static void
8181 record_section_with_aarch64_elf_section_data (asection *sec)
8182 {
8183 struct section_list *entry;
8184
8185 entry = bfd_malloc (sizeof (*entry));
8186 if (entry == NULL)
8187 return;
8188 entry->sec = sec;
8189 entry->next = sections_with_aarch64_elf_section_data;
8190 entry->prev = NULL;
8191 if (entry->next != NULL)
8192 entry->next->prev = entry;
8193 sections_with_aarch64_elf_section_data = entry;
8194 }
8195
8196 static struct section_list *
8197 find_aarch64_elf_section_entry (asection *sec)
8198 {
8199 struct section_list *entry;
8200 static struct section_list *last_entry = NULL;
8201
8202 /* This is a short cut for the typical case where the sections are added
8203 to the sections_with_aarch64_elf_section_data list in forward order and
8204 then looked up here in backwards order. This makes a real difference
8205 to the ld-srec/sec64k.exp linker test. */
8206 entry = sections_with_aarch64_elf_section_data;
8207 if (last_entry != NULL)
8208 {
8209 if (last_entry->sec == sec)
8210 entry = last_entry;
8211 else if (last_entry->next != NULL && last_entry->next->sec == sec)
8212 entry = last_entry->next;
8213 }
8214
8215 for (; entry; entry = entry->next)
8216 if (entry->sec == sec)
8217 break;
8218
8219 if (entry)
8220 /* Record the entry prior to this one - it is the entry we are
8221 most likely to want to locate next time. Also this way if we
8222 have been called from
8223 unrecord_section_with_aarch64_elf_section_data () we will not
8224 be caching a pointer that is about to be freed. */
8225 last_entry = entry->prev;
8226
8227 return entry;
8228 }
8229
8230 static void
8231 unrecord_section_with_aarch64_elf_section_data (asection *sec)
8232 {
8233 struct section_list *entry;
8234
8235 entry = find_aarch64_elf_section_entry (sec);
8236
8237 if (entry)
8238 {
8239 if (entry->prev != NULL)
8240 entry->prev->next = entry->next;
8241 if (entry->next != NULL)
8242 entry->next->prev = entry->prev;
8243 if (entry == sections_with_aarch64_elf_section_data)
8244 sections_with_aarch64_elf_section_data = entry->next;
8245 free (entry);
8246 }
8247 }
8248
8249
8250 typedef struct
8251 {
8252 void *finfo;
8253 struct bfd_link_info *info;
8254 asection *sec;
8255 int sec_shndx;
8256 int (*func) (void *, const char *, Elf_Internal_Sym *,
8257 asection *, struct elf_link_hash_entry *);
8258 } output_arch_syminfo;
8259
8260 enum map_symbol_type
8261 {
8262 AARCH64_MAP_INSN,
8263 AARCH64_MAP_DATA
8264 };
8265
8266
8267 /* Output a single mapping symbol. */
8268
8269 static bool
8270 elfNN_aarch64_output_map_sym (output_arch_syminfo *osi,
8271 enum map_symbol_type type, bfd_vma offset)
8272 {
8273 static const char *names[2] = { "$x", "$d" };
8274 Elf_Internal_Sym sym;
8275
8276 sym.st_value = (osi->sec->output_section->vma
8277 + osi->sec->output_offset + offset);
8278 sym.st_size = 0;
8279 sym.st_other = 0;
8280 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
8281 sym.st_shndx = osi->sec_shndx;
8282 return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1;
8283 }
8284
8285 /* Output a single local symbol for a generated stub. */
8286
8287 static bool
8288 elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name,
8289 bfd_vma offset, bfd_vma size)
8290 {
8291 Elf_Internal_Sym sym;
8292
8293 sym.st_value = (osi->sec->output_section->vma
8294 + osi->sec->output_offset + offset);
8295 sym.st_size = size;
8296 sym.st_other = 0;
8297 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
8298 sym.st_shndx = osi->sec_shndx;
8299 return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1;
8300 }
8301
8302 static bool
8303 aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
8304 {
8305 struct elf_aarch64_stub_hash_entry *stub_entry;
8306 asection *stub_sec;
8307 bfd_vma addr;
8308 char *stub_name;
8309 output_arch_syminfo *osi;
8310
8311 /* Massage our args to the form they really have. */
8312 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
8313 osi = (output_arch_syminfo *) in_arg;
8314
8315 stub_sec = stub_entry->stub_sec;
8316
8317 /* Ensure this stub is attached to the current section being
8318 processed. */
8319 if (stub_sec != osi->sec)
8320 return true;
8321
8322 addr = (bfd_vma) stub_entry->stub_offset;
8323
8324 stub_name = stub_entry->output_name;
8325
8326 switch (stub_entry->stub_type)
8327 {
8328 case aarch64_stub_adrp_branch:
8329 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
8330 sizeof (aarch64_adrp_branch_stub)))
8331 return false;
8332 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
8333 return false;
8334 break;
8335 case aarch64_stub_long_branch:
8336 if (!elfNN_aarch64_output_stub_sym
8337 (osi, stub_name, addr, sizeof (aarch64_long_branch_stub)))
8338 return false;
8339 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
8340 return false;
8341 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16))
8342 return false;
8343 break;
8344 case aarch64_stub_erratum_835769_veneer:
8345 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
8346 sizeof (aarch64_erratum_835769_stub)))
8347 return false;
8348 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
8349 return false;
8350 break;
8351 case aarch64_stub_erratum_843419_veneer:
8352 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
8353 sizeof (aarch64_erratum_843419_stub)))
8354 return false;
8355 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
8356 return false;
8357 break;
8358 case aarch64_stub_none:
8359 break;
8360
8361 default:
8362 abort ();
8363 }
8364
8365 return true;
8366 }
8367
8368 /* Output mapping symbols for linker generated sections. */
8369
8370 static bool
8371 elfNN_aarch64_output_arch_local_syms (bfd *output_bfd,
8372 struct bfd_link_info *info,
8373 void *finfo,
8374 int (*func) (void *, const char *,
8375 Elf_Internal_Sym *,
8376 asection *,
8377 struct elf_link_hash_entry
8378 *))
8379 {
8380 output_arch_syminfo osi;
8381 struct elf_aarch64_link_hash_table *htab;
8382
8383 htab = elf_aarch64_hash_table (info);
8384
8385 osi.finfo = finfo;
8386 osi.info = info;
8387 osi.func = func;
8388
8389 /* Long calls stubs. */
8390 if (htab->stub_bfd && htab->stub_bfd->sections)
8391 {
8392 asection *stub_sec;
8393
8394 for (stub_sec = htab->stub_bfd->sections;
8395 stub_sec != NULL; stub_sec = stub_sec->next)
8396 {
8397 /* Ignore non-stub sections. */
8398 if (!strstr (stub_sec->name, STUB_SUFFIX))
8399 continue;
8400
8401 osi.sec = stub_sec;
8402
8403 osi.sec_shndx = _bfd_elf_section_from_bfd_section
8404 (output_bfd, osi.sec->output_section);
8405
8406 /* The first instruction in a stub is always a branch. */
8407 if (!elfNN_aarch64_output_map_sym (&osi, AARCH64_MAP_INSN, 0))
8408 return false;
8409
8410 bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub,
8411 &osi);
8412 }
8413 }
8414
8415 /* Finally, output mapping symbols for the PLT. */
8416 if (!htab->root.splt || htab->root.splt->size == 0)
8417 return true;
8418
8419 osi.sec_shndx = _bfd_elf_section_from_bfd_section
8420 (output_bfd, htab->root.splt->output_section);
8421 osi.sec = htab->root.splt;
8422
8423 elfNN_aarch64_output_map_sym (&osi, AARCH64_MAP_INSN, 0);
8424
8425 return true;
8426
8427 }
8428
8429 /* Allocate target specific section data. */
8430
8431 static bool
8432 elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec)
8433 {
8434 if (!sec->used_by_bfd)
8435 {
8436 _aarch64_elf_section_data *sdata;
8437 size_t amt = sizeof (*sdata);
8438
8439 sdata = bfd_zalloc (abfd, amt);
8440 if (sdata == NULL)
8441 return false;
8442 sec->used_by_bfd = sdata;
8443 }
8444
8445 record_section_with_aarch64_elf_section_data (sec);
8446
8447 return _bfd_elf_new_section_hook (abfd, sec);
8448 }
8449
8450
8451 static void
8452 unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED,
8453 asection *sec,
8454 void *ignore ATTRIBUTE_UNUSED)
8455 {
8456 unrecord_section_with_aarch64_elf_section_data (sec);
8457 }
8458
8459 static bool
8460 elfNN_aarch64_close_and_cleanup (bfd *abfd)
8461 {
8462 if (abfd->sections)
8463 bfd_map_over_sections (abfd,
8464 unrecord_section_via_map_over_sections, NULL);
8465
8466 return _bfd_elf_close_and_cleanup (abfd);
8467 }
8468
8469 static bool
8470 elfNN_aarch64_bfd_free_cached_info (bfd *abfd)
8471 {
8472 if (abfd->sections)
8473 bfd_map_over_sections (abfd,
8474 unrecord_section_via_map_over_sections, NULL);
8475
8476 return _bfd_free_cached_info (abfd);
8477 }
8478
8479 /* Create dynamic sections. This is different from the ARM backend in that
8480 the got, plt, gotplt and their relocation sections are all created in the
8481 standard part of the bfd elf backend. */
8482
8483 static bool
8484 elfNN_aarch64_create_dynamic_sections (bfd *dynobj,
8485 struct bfd_link_info *info)
8486 {
8487 /* We need to create .got section. */
8488 if (!aarch64_elf_create_got_section (dynobj, info))
8489 return false;
8490
8491 return _bfd_elf_create_dynamic_sections (dynobj, info);
8492 }
8493
8494
8495 /* Allocate space in .plt, .got and associated reloc sections for
8496 dynamic relocs. */
8497
8498 static bool
8499 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
8500 {
8501 struct bfd_link_info *info;
8502 struct elf_aarch64_link_hash_table *htab;
8503 struct elf_aarch64_link_hash_entry *eh;
8504 struct elf_dyn_relocs *p;
8505
8506 /* An example of a bfd_link_hash_indirect symbol is versioned
8507 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8508 -> __gxx_personality_v0(bfd_link_hash_defined)
8509
8510 There is no need to process bfd_link_hash_indirect symbols here
8511 because we will also be presented with the concrete instance of
8512 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8513 called to copy all relevant data from the generic to the concrete
8514 symbol instance. */
8515 if (h->root.type == bfd_link_hash_indirect)
8516 return true;
8517
8518 if (h->root.type == bfd_link_hash_warning)
8519 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8520
8521 info = (struct bfd_link_info *) inf;
8522 htab = elf_aarch64_hash_table (info);
8523
8524 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8525 here if it is defined and referenced in a non-shared object. */
8526 if (h->type == STT_GNU_IFUNC
8527 && h->def_regular)
8528 return true;
8529 else if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
8530 {
8531 /* Make sure this symbol is output as a dynamic symbol.
8532 Undefined weak syms won't yet be marked as dynamic. */
8533 if (h->dynindx == -1 && !h->forced_local
8534 && h->root.type == bfd_link_hash_undefweak)
8535 {
8536 if (!bfd_elf_link_record_dynamic_symbol (info, h))
8537 return false;
8538 }
8539
8540 if (bfd_link_pic (info) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
8541 {
8542 asection *s = htab->root.splt;
8543
8544 /* If this is the first .plt entry, make room for the special
8545 first entry. */
8546 if (s->size == 0)
8547 s->size += htab->plt_header_size;
8548
8549 h->plt.offset = s->size;
8550
8551 /* If this symbol is not defined in a regular file, and we are
8552 not generating a shared library, then set the symbol to this
8553 location in the .plt. This is required to make function
8554 pointers compare as equal between the normal executable and
8555 the shared library. */
8556 if (!bfd_link_pic (info) && !h->def_regular)
8557 {
8558 h->root.u.def.section = s;
8559 h->root.u.def.value = h->plt.offset;
8560 }
8561
8562 /* Make room for this entry. For now we only create the
8563 small model PLT entries. We later need to find a way
8564 of relaxing into these from the large model PLT entries. */
8565 s->size += htab->plt_entry_size;
8566
8567 /* We also need to make an entry in the .got.plt section, which
8568 will be placed in the .got section by the linker script. */
8569 htab->root.sgotplt->size += GOT_ENTRY_SIZE;
8570
8571 /* We also need to make an entry in the .rela.plt section. */
8572 htab->root.srelplt->size += RELOC_SIZE (htab);
8573
8574 /* We need to ensure that all GOT entries that serve the PLT
8575 are consecutive with the special GOT slots [0] [1] and
8576 [2]. Any addtional relocations, such as
8577 R_AARCH64_TLSDESC, must be placed after the PLT related
8578 entries. We abuse the reloc_count such that during
8579 sizing we adjust reloc_count to indicate the number of
8580 PLT related reserved entries. In subsequent phases when
8581 filling in the contents of the reloc entries, PLT related
8582 entries are placed by computing their PLT index (0
8583 .. reloc_count). While other none PLT relocs are placed
8584 at the slot indicated by reloc_count and reloc_count is
8585 updated. */
8586
8587 htab->root.srelplt->reloc_count++;
8588
8589 /* Mark the DSO in case R_<CLS>_JUMP_SLOT relocs against
8590 variant PCS symbols are present. */
8591 if (h->other & STO_AARCH64_VARIANT_PCS)
8592 htab->variant_pcs = 1;
8593
8594 }
8595 else
8596 {
8597 h->plt.offset = (bfd_vma) - 1;
8598 h->needs_plt = 0;
8599 }
8600 }
8601 else
8602 {
8603 h->plt.offset = (bfd_vma) - 1;
8604 h->needs_plt = 0;
8605 }
8606
8607 eh = (struct elf_aarch64_link_hash_entry *) h;
8608 eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
8609
8610 if (h->got.refcount > 0)
8611 {
8612 bool dyn;
8613 unsigned got_type = elf_aarch64_hash_entry (h)->got_type;
8614
8615 h->got.offset = (bfd_vma) - 1;
8616
8617 dyn = htab->root.dynamic_sections_created;
8618
8619 /* Make sure this symbol is output as a dynamic symbol.
8620 Undefined weak syms won't yet be marked as dynamic. */
8621 if (dyn && h->dynindx == -1 && !h->forced_local
8622 && h->root.type == bfd_link_hash_undefweak)
8623 {
8624 if (!bfd_elf_link_record_dynamic_symbol (info, h))
8625 return false;
8626 }
8627
8628 if (got_type == GOT_UNKNOWN)
8629 {
8630 }
8631 else if (got_type == GOT_NORMAL)
8632 {
8633 h->got.offset = htab->root.sgot->size;
8634 htab->root.sgot->size += GOT_ENTRY_SIZE;
8635 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8636 || h->root.type != bfd_link_hash_undefweak)
8637 && (bfd_link_pic (info)
8638 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
8639 /* Undefined weak symbol in static PIE resolves to 0 without
8640 any dynamic relocations. */
8641 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8642 {
8643 htab->root.srelgot->size += RELOC_SIZE (htab);
8644 }
8645 }
8646 else
8647 {
8648 int indx;
8649 if (got_type & GOT_TLSDESC_GD)
8650 {
8651 eh->tlsdesc_got_jump_table_offset =
8652 (htab->root.sgotplt->size
8653 - aarch64_compute_jump_table_size (htab));
8654 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
8655 h->got.offset = (bfd_vma) - 2;
8656 }
8657
8658 if (got_type & GOT_TLS_GD)
8659 {
8660 h->got.offset = htab->root.sgot->size;
8661 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
8662 }
8663
8664 if (got_type & GOT_TLS_IE)
8665 {
8666 h->got.offset = htab->root.sgot->size;
8667 htab->root.sgot->size += GOT_ENTRY_SIZE;
8668 }
8669
8670 indx = h && h->dynindx != -1 ? h->dynindx : 0;
8671 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8672 || h->root.type != bfd_link_hash_undefweak)
8673 && (!bfd_link_executable (info)
8674 || indx != 0
8675 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
8676 {
8677 if (got_type & GOT_TLSDESC_GD)
8678 {
8679 htab->root.srelplt->size += RELOC_SIZE (htab);
8680 /* Note reloc_count not incremented here! We have
8681 already adjusted reloc_count for this relocation
8682 type. */
8683
8684 /* TLSDESC PLT is now needed, but not yet determined. */
8685 htab->root.tlsdesc_plt = (bfd_vma) - 1;
8686 }
8687
8688 if (got_type & GOT_TLS_GD)
8689 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
8690
8691 if (got_type & GOT_TLS_IE)
8692 htab->root.srelgot->size += RELOC_SIZE (htab);
8693 }
8694 }
8695 }
8696 else
8697 {
8698 h->got.offset = (bfd_vma) - 1;
8699 }
8700
8701 if (h->dyn_relocs == NULL)
8702 return true;
8703
8704 /* In the shared -Bsymbolic case, discard space allocated for
8705 dynamic pc-relative relocs against symbols which turn out to be
8706 defined in regular objects. For the normal shared case, discard
8707 space for pc-relative relocs that have become local due to symbol
8708 visibility changes. */
8709
8710 if (bfd_link_pic (info))
8711 {
8712 /* Relocs that use pc_count are those that appear on a call
8713 insn, or certain REL relocs that can generated via assembly.
8714 We want calls to protected symbols to resolve directly to the
8715 function rather than going via the plt. If people want
8716 function pointer comparisons to work as expected then they
8717 should avoid writing weird assembly. */
8718 if (SYMBOL_CALLS_LOCAL (info, h))
8719 {
8720 struct elf_dyn_relocs **pp;
8721
8722 for (pp = &h->dyn_relocs; (p = *pp) != NULL;)
8723 {
8724 p->count -= p->pc_count;
8725 p->pc_count = 0;
8726 if (p->count == 0)
8727 *pp = p->next;
8728 else
8729 pp = &p->next;
8730 }
8731 }
8732
8733 /* Also discard relocs on undefined weak syms with non-default
8734 visibility. */
8735 if (h->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak)
8736 {
8737 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
8738 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8739 h->dyn_relocs = NULL;
8740
8741 /* Make sure undefined weak symbols are output as a dynamic
8742 symbol in PIEs. */
8743 else if (h->dynindx == -1
8744 && !h->forced_local
8745 && h->root.type == bfd_link_hash_undefweak
8746 && !bfd_elf_link_record_dynamic_symbol (info, h))
8747 return false;
8748 }
8749
8750 }
8751 else if (ELIMINATE_COPY_RELOCS)
8752 {
8753 /* For the non-shared case, discard space for relocs against
8754 symbols which turn out to need copy relocs or are not
8755 dynamic. */
8756
8757 if (!h->non_got_ref
8758 && ((h->def_dynamic
8759 && !h->def_regular)
8760 || (htab->root.dynamic_sections_created
8761 && (h->root.type == bfd_link_hash_undefweak
8762 || h->root.type == bfd_link_hash_undefined))))
8763 {
8764 /* Make sure this symbol is output as a dynamic symbol.
8765 Undefined weak syms won't yet be marked as dynamic. */
8766 if (h->dynindx == -1
8767 && !h->forced_local
8768 && h->root.type == bfd_link_hash_undefweak
8769 && !bfd_elf_link_record_dynamic_symbol (info, h))
8770 return false;
8771
8772 /* If that succeeded, we know we'll be keeping all the
8773 relocs. */
8774 if (h->dynindx != -1)
8775 goto keep;
8776 }
8777
8778 h->dyn_relocs = NULL;
8779
8780 keep:;
8781 }
8782
8783 /* Finally, allocate space. */
8784 for (p = h->dyn_relocs; p != NULL; p = p->next)
8785 {
8786 asection *sreloc;
8787
8788 sreloc = elf_section_data (p->sec)->sreloc;
8789
8790 BFD_ASSERT (sreloc != NULL);
8791
8792 sreloc->size += p->count * RELOC_SIZE (htab);
8793 }
8794
8795 return true;
8796 }
8797
8798 /* Allocate space in .plt, .got and associated reloc sections for
8799 ifunc dynamic relocs. */
8800
8801 static bool
8802 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h,
8803 void *inf)
8804 {
8805 struct bfd_link_info *info;
8806 struct elf_aarch64_link_hash_table *htab;
8807
8808 /* An example of a bfd_link_hash_indirect symbol is versioned
8809 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8810 -> __gxx_personality_v0(bfd_link_hash_defined)
8811
8812 There is no need to process bfd_link_hash_indirect symbols here
8813 because we will also be presented with the concrete instance of
8814 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8815 called to copy all relevant data from the generic to the concrete
8816 symbol instance. */
8817 if (h->root.type == bfd_link_hash_indirect)
8818 return true;
8819
8820 if (h->root.type == bfd_link_hash_warning)
8821 h = (struct elf_link_hash_entry *) h->root.u.i.link;
8822
8823 info = (struct bfd_link_info *) inf;
8824 htab = elf_aarch64_hash_table (info);
8825
8826 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8827 here if it is defined and referenced in a non-shared object. */
8828 if (h->type == STT_GNU_IFUNC
8829 && h->def_regular)
8830 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
8831 &h->dyn_relocs,
8832 htab->plt_entry_size,
8833 htab->plt_header_size,
8834 GOT_ENTRY_SIZE,
8835 false);
8836 return true;
8837 }
8838
8839 /* Allocate space in .plt, .got and associated reloc sections for
8840 local ifunc dynamic relocs. */
8841
8842 static int
8843 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf)
8844 {
8845 struct elf_link_hash_entry *h
8846 = (struct elf_link_hash_entry *) *slot;
8847
8848 if (h->type != STT_GNU_IFUNC
8849 || !h->def_regular
8850 || !h->ref_regular
8851 || !h->forced_local
8852 || h->root.type != bfd_link_hash_defined)
8853 abort ();
8854
8855 return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf);
8856 }
8857
8858 /* This is the most important function of all . Innocuosly named
8859 though ! */
8860
8861 static bool
8862 elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8863 struct bfd_link_info *info)
8864 {
8865 struct elf_aarch64_link_hash_table *htab;
8866 bfd *dynobj;
8867 asection *s;
8868 bool relocs;
8869 bfd *ibfd;
8870
8871 htab = elf_aarch64_hash_table ((info));
8872 dynobj = htab->root.dynobj;
8873
8874 BFD_ASSERT (dynobj != NULL);
8875
8876 if (htab->root.dynamic_sections_created)
8877 {
8878 if (bfd_link_executable (info) && !info->nointerp)
8879 {
8880 s = bfd_get_linker_section (dynobj, ".interp");
8881 if (s == NULL)
8882 abort ();
8883 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8884 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8885 }
8886 }
8887
8888 /* Set up .got offsets for local syms, and space for local dynamic
8889 relocs. */
8890 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8891 {
8892 struct elf_aarch64_local_symbol *locals = NULL;
8893 Elf_Internal_Shdr *symtab_hdr;
8894 asection *srel;
8895 unsigned int i;
8896
8897 if (!is_aarch64_elf (ibfd))
8898 continue;
8899
8900 for (s = ibfd->sections; s != NULL; s = s->next)
8901 {
8902 struct elf_dyn_relocs *p;
8903
8904 for (p = (struct elf_dyn_relocs *)
8905 (elf_section_data (s)->local_dynrel); p != NULL; p = p->next)
8906 {
8907 if (!bfd_is_abs_section (p->sec)
8908 && bfd_is_abs_section (p->sec->output_section))
8909 {
8910 /* Input section has been discarded, either because
8911 it is a copy of a linkonce section or due to
8912 linker script /DISCARD/, so we'll be discarding
8913 the relocs too. */
8914 }
8915 else if (p->count != 0)
8916 {
8917 srel = elf_section_data (p->sec)->sreloc;
8918 srel->size += p->count * RELOC_SIZE (htab);
8919 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8920 info->flags |= DF_TEXTREL;
8921 }
8922 }
8923 }
8924
8925 locals = elf_aarch64_locals (ibfd);
8926 if (!locals)
8927 continue;
8928
8929 symtab_hdr = &elf_symtab_hdr (ibfd);
8930 srel = htab->root.srelgot;
8931 for (i = 0; i < symtab_hdr->sh_info; i++)
8932 {
8933 locals[i].got_offset = (bfd_vma) - 1;
8934 locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
8935 if (locals[i].got_refcount > 0)
8936 {
8937 unsigned got_type = locals[i].got_type;
8938 if (got_type & GOT_TLSDESC_GD)
8939 {
8940 locals[i].tlsdesc_got_jump_table_offset =
8941 (htab->root.sgotplt->size
8942 - aarch64_compute_jump_table_size (htab));
8943 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
8944 locals[i].got_offset = (bfd_vma) - 2;
8945 }
8946
8947 if (got_type & GOT_TLS_GD)
8948 {
8949 locals[i].got_offset = htab->root.sgot->size;
8950 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
8951 }
8952
8953 if (got_type & GOT_TLS_IE
8954 || got_type & GOT_NORMAL)
8955 {
8956 locals[i].got_offset = htab->root.sgot->size;
8957 htab->root.sgot->size += GOT_ENTRY_SIZE;
8958 }
8959
8960 if (got_type == GOT_UNKNOWN)
8961 {
8962 }
8963
8964 if (bfd_link_pic (info))
8965 {
8966 if (got_type & GOT_TLSDESC_GD)
8967 {
8968 htab->root.srelplt->size += RELOC_SIZE (htab);
8969 /* Note RELOC_COUNT not incremented here! */
8970 htab->root.tlsdesc_plt = (bfd_vma) - 1;
8971 }
8972
8973 if (got_type & GOT_TLS_GD)
8974 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
8975
8976 if (got_type & GOT_TLS_IE
8977 || got_type & GOT_NORMAL)
8978 htab->root.srelgot->size += RELOC_SIZE (htab);
8979 }
8980 }
8981 else
8982 {
8983 locals[i].got_refcount = (bfd_vma) - 1;
8984 }
8985 }
8986 }
8987
8988
8989 /* Allocate global sym .plt and .got entries, and space for global
8990 sym dynamic relocs. */
8991 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs,
8992 info);
8993
8994 /* Allocate global ifunc sym .plt and .got entries, and space for global
8995 ifunc sym dynamic relocs. */
8996 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs,
8997 info);
8998
8999 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
9000 htab_traverse (htab->loc_hash_table,
9001 elfNN_aarch64_allocate_local_ifunc_dynrelocs,
9002 info);
9003
9004 /* For every jump slot reserved in the sgotplt, reloc_count is
9005 incremented. However, when we reserve space for TLS descriptors,
9006 it's not incremented, so in order to compute the space reserved
9007 for them, it suffices to multiply the reloc count by the jump
9008 slot size. */
9009
9010 if (htab->root.srelplt)
9011 htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
9012
9013 if (htab->root.tlsdesc_plt)
9014 {
9015 if (htab->root.splt->size == 0)
9016 htab->root.splt->size += htab->plt_header_size;
9017
9018 /* If we're not using lazy TLS relocations, don't generate the
9019 GOT and PLT entry required. */
9020 if ((info->flags & DF_BIND_NOW))
9021 htab->root.tlsdesc_plt = 0;
9022 else
9023 {
9024 htab->root.tlsdesc_plt = htab->root.splt->size;
9025 htab->root.splt->size += htab->tlsdesc_plt_entry_size;
9026
9027 htab->root.tlsdesc_got = htab->root.sgot->size;
9028 htab->root.sgot->size += GOT_ENTRY_SIZE;
9029 }
9030 }
9031
9032 /* Init mapping symbols information to use later to distingush between
9033 code and data while scanning for errata. */
9034 if (htab->fix_erratum_835769 || htab->fix_erratum_843419)
9035 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
9036 {
9037 if (!is_aarch64_elf (ibfd))
9038 continue;
9039 bfd_elfNN_aarch64_init_maps (ibfd);
9040 }
9041
9042 /* We now have determined the sizes of the various dynamic sections.
9043 Allocate memory for them. */
9044 relocs = false;
9045 for (s = dynobj->sections; s != NULL; s = s->next)
9046 {
9047 if ((s->flags & SEC_LINKER_CREATED) == 0)
9048 continue;
9049
9050 if (s == htab->root.splt
9051 || s == htab->root.sgot
9052 || s == htab->root.sgotplt
9053 || s == htab->root.iplt
9054 || s == htab->root.igotplt
9055 || s == htab->root.sdynbss
9056 || s == htab->root.sdynrelro)
9057 {
9058 /* Strip this section if we don't need it; see the
9059 comment below. */
9060 }
9061 else if (startswith (bfd_section_name (s), ".rela"))
9062 {
9063 if (s->size != 0 && s != htab->root.srelplt)
9064 relocs = true;
9065
9066 /* We use the reloc_count field as a counter if we need
9067 to copy relocs into the output file. */
9068 if (s != htab->root.srelplt)
9069 s->reloc_count = 0;
9070 }
9071 else
9072 {
9073 /* It's not one of our sections, so don't allocate space. */
9074 continue;
9075 }
9076
9077 if (s->size == 0)
9078 {
9079 /* If we don't need this section, strip it from the
9080 output file. This is mostly to handle .rela.bss and
9081 .rela.plt. We must create both sections in
9082 create_dynamic_sections, because they must be created
9083 before the linker maps input sections to output
9084 sections. The linker does that before
9085 adjust_dynamic_symbol is called, and it is that
9086 function which decides whether anything needs to go
9087 into these sections. */
9088 s->flags |= SEC_EXCLUDE;
9089 continue;
9090 }
9091
9092 if ((s->flags & SEC_HAS_CONTENTS) == 0)
9093 continue;
9094
9095 /* Allocate memory for the section contents. We use bfd_zalloc
9096 here in case unused entries are not reclaimed before the
9097 section's contents are written out. This should not happen,
9098 but this way if it does, we get a R_AARCH64_NONE reloc instead
9099 of garbage. */
9100 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
9101 if (s->contents == NULL)
9102 return false;
9103 }
9104
9105 if (htab->root.dynamic_sections_created)
9106 {
9107 /* Add some entries to the .dynamic section. We fill in the
9108 values later, in elfNN_aarch64_finish_dynamic_sections, but we
9109 must add the entries now so that we get the correct size for
9110 the .dynamic section. The DT_DEBUG entry is filled in by the
9111 dynamic linker and used by the debugger. */
9112 #define add_dynamic_entry(TAG, VAL) \
9113 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
9114
9115 if (!_bfd_elf_add_dynamic_tags (output_bfd, info, relocs))
9116 return false;
9117
9118 if (htab->root.splt->size != 0)
9119 {
9120 if (htab->variant_pcs
9121 && !add_dynamic_entry (DT_AARCH64_VARIANT_PCS, 0))
9122 return false;
9123
9124 if ((elf_aarch64_tdata (output_bfd)->plt_type == PLT_BTI_PAC)
9125 && (!add_dynamic_entry (DT_AARCH64_BTI_PLT, 0)
9126 || !add_dynamic_entry (DT_AARCH64_PAC_PLT, 0)))
9127 return false;
9128
9129 else if ((elf_aarch64_tdata (output_bfd)->plt_type == PLT_BTI)
9130 && !add_dynamic_entry (DT_AARCH64_BTI_PLT, 0))
9131 return false;
9132
9133 else if ((elf_aarch64_tdata (output_bfd)->plt_type == PLT_PAC)
9134 && !add_dynamic_entry (DT_AARCH64_PAC_PLT, 0))
9135 return false;
9136 }
9137 }
9138 #undef add_dynamic_entry
9139
9140 return true;
9141 }
9142
9143 static inline void
9144 elf_aarch64_update_plt_entry (bfd *output_bfd,
9145 bfd_reloc_code_real_type r_type,
9146 bfd_byte *plt_entry, bfd_vma value)
9147 {
9148 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type);
9149
9150 /* FIXME: We should check the return value from this function call. */
9151 (void) _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value);
9152 }
9153
9154 static void
9155 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
9156 struct elf_aarch64_link_hash_table
9157 *htab, bfd *output_bfd,
9158 struct bfd_link_info *info)
9159 {
9160 bfd_byte *plt_entry;
9161 bfd_vma plt_index;
9162 bfd_vma got_offset;
9163 bfd_vma gotplt_entry_address;
9164 bfd_vma plt_entry_address;
9165 Elf_Internal_Rela rela;
9166 bfd_byte *loc;
9167 asection *plt, *gotplt, *relplt;
9168
9169 /* When building a static executable, use .iplt, .igot.plt and
9170 .rela.iplt sections for STT_GNU_IFUNC symbols. */
9171 if (htab->root.splt != NULL)
9172 {
9173 plt = htab->root.splt;
9174 gotplt = htab->root.sgotplt;
9175 relplt = htab->root.srelplt;
9176 }
9177 else
9178 {
9179 plt = htab->root.iplt;
9180 gotplt = htab->root.igotplt;
9181 relplt = htab->root.irelplt;
9182 }
9183
9184 /* Get the index in the procedure linkage table which
9185 corresponds to this symbol. This is the index of this symbol
9186 in all the symbols for which we are making plt entries. The
9187 first entry in the procedure linkage table is reserved.
9188
9189 Get the offset into the .got table of the entry that
9190 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
9191 bytes. The first three are reserved for the dynamic linker.
9192
9193 For static executables, we don't reserve anything. */
9194
9195 if (plt == htab->root.splt)
9196 {
9197 plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
9198 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
9199 }
9200 else
9201 {
9202 plt_index = h->plt.offset / htab->plt_entry_size;
9203 got_offset = plt_index * GOT_ENTRY_SIZE;
9204 }
9205
9206 plt_entry = plt->contents + h->plt.offset;
9207 plt_entry_address = plt->output_section->vma
9208 + plt->output_offset + h->plt.offset;
9209 gotplt_entry_address = gotplt->output_section->vma +
9210 gotplt->output_offset + got_offset;
9211
9212 /* Copy in the boiler-plate for the PLTn entry. */
9213 memcpy (plt_entry, htab->plt_entry, htab->plt_entry_size);
9214
9215 /* First instruction in BTI enabled PLT stub is a BTI
9216 instruction so skip it. */
9217 if (elf_aarch64_tdata (output_bfd)->plt_type & PLT_BTI
9218 && elf_elfheader (output_bfd)->e_type == ET_EXEC)
9219 plt_entry = plt_entry + 4;
9220
9221 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
9222 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
9223 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
9224 plt_entry,
9225 PG (gotplt_entry_address) -
9226 PG (plt_entry_address));
9227
9228 /* Fill in the lo12 bits for the load from the pltgot. */
9229 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
9230 plt_entry + 4,
9231 PG_OFFSET (gotplt_entry_address));
9232
9233 /* Fill in the lo12 bits for the add from the pltgot entry. */
9234 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
9235 plt_entry + 8,
9236 PG_OFFSET (gotplt_entry_address));
9237
9238 /* All the GOTPLT Entries are essentially initialized to PLT0. */
9239 bfd_put_NN (output_bfd,
9240 plt->output_section->vma + plt->output_offset,
9241 gotplt->contents + got_offset);
9242
9243 rela.r_offset = gotplt_entry_address;
9244
9245 if (h->dynindx == -1
9246 || ((bfd_link_executable (info)
9247 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
9248 && h->def_regular
9249 && h->type == STT_GNU_IFUNC))
9250 {
9251 /* If an STT_GNU_IFUNC symbol is locally defined, generate
9252 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
9253 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
9254 rela.r_addend = (h->root.u.def.value
9255 + h->root.u.def.section->output_section->vma
9256 + h->root.u.def.section->output_offset);
9257 }
9258 else
9259 {
9260 /* Fill in the entry in the .rela.plt section. */
9261 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT));
9262 rela.r_addend = 0;
9263 }
9264
9265 /* Compute the relocation entry to used based on PLT index and do
9266 not adjust reloc_count. The reloc_count has already been adjusted
9267 to account for this entry. */
9268 loc = relplt->contents + plt_index * RELOC_SIZE (htab);
9269 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
9270 }
9271
9272 /* Size sections even though they're not dynamic. We use it to setup
9273 _TLS_MODULE_BASE_, if needed. */
9274
9275 static bool
9276 elfNN_aarch64_always_size_sections (bfd *output_bfd,
9277 struct bfd_link_info *info)
9278 {
9279 asection *tls_sec;
9280
9281 if (bfd_link_relocatable (info))
9282 return true;
9283
9284 tls_sec = elf_hash_table (info)->tls_sec;
9285
9286 if (tls_sec)
9287 {
9288 struct elf_link_hash_entry *tlsbase;
9289
9290 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
9291 "_TLS_MODULE_BASE_", true, true, false);
9292
9293 if (tlsbase)
9294 {
9295 struct bfd_link_hash_entry *h = NULL;
9296 const struct elf_backend_data *bed =
9297 get_elf_backend_data (output_bfd);
9298
9299 if (!(_bfd_generic_link_add_one_symbol
9300 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
9301 tls_sec, 0, NULL, false, bed->collect, &h)))
9302 return false;
9303
9304 tlsbase->type = STT_TLS;
9305 tlsbase = (struct elf_link_hash_entry *) h;
9306 tlsbase->def_regular = 1;
9307 tlsbase->other = STV_HIDDEN;
9308 (*bed->elf_backend_hide_symbol) (info, tlsbase, true);
9309 }
9310 }
9311
9312 return true;
9313 }
9314
9315 /* Finish up dynamic symbol handling. We set the contents of various
9316 dynamic sections here. */
9317
9318 static bool
9319 elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd,
9320 struct bfd_link_info *info,
9321 struct elf_link_hash_entry *h,
9322 Elf_Internal_Sym *sym)
9323 {
9324 struct elf_aarch64_link_hash_table *htab;
9325 htab = elf_aarch64_hash_table (info);
9326
9327 if (h->plt.offset != (bfd_vma) - 1)
9328 {
9329 asection *plt, *gotplt, *relplt;
9330
9331 /* This symbol has an entry in the procedure linkage table. Set
9332 it up. */
9333
9334 /* When building a static executable, use .iplt, .igot.plt and
9335 .rela.iplt sections for STT_GNU_IFUNC symbols. */
9336 if (htab->root.splt != NULL)
9337 {
9338 plt = htab->root.splt;
9339 gotplt = htab->root.sgotplt;
9340 relplt = htab->root.srelplt;
9341 }
9342 else
9343 {
9344 plt = htab->root.iplt;
9345 gotplt = htab->root.igotplt;
9346 relplt = htab->root.irelplt;
9347 }
9348
9349 /* This symbol has an entry in the procedure linkage table. Set
9350 it up. */
9351 if ((h->dynindx == -1
9352 && !((h->forced_local || bfd_link_executable (info))
9353 && h->def_regular
9354 && h->type == STT_GNU_IFUNC))
9355 || plt == NULL
9356 || gotplt == NULL
9357 || relplt == NULL)
9358 return false;
9359
9360 elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info);
9361 if (!h->def_regular)
9362 {
9363 /* Mark the symbol as undefined, rather than as defined in
9364 the .plt section. */
9365 sym->st_shndx = SHN_UNDEF;
9366 /* If the symbol is weak we need to clear the value.
9367 Otherwise, the PLT entry would provide a definition for
9368 the symbol even if the symbol wasn't defined anywhere,
9369 and so the symbol would never be NULL. Leave the value if
9370 there were any relocations where pointer equality matters
9371 (this is a clue for the dynamic linker, to make function
9372 pointer comparisons work between an application and shared
9373 library). */
9374 if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
9375 sym->st_value = 0;
9376 }
9377 }
9378
9379 if (h->got.offset != (bfd_vma) - 1
9380 && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL
9381 /* Undefined weak symbol in static PIE resolves to 0 without
9382 any dynamic relocations. */
9383 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
9384 {
9385 Elf_Internal_Rela rela;
9386 bfd_byte *loc;
9387
9388 /* This symbol has an entry in the global offset table. Set it
9389 up. */
9390 if (htab->root.sgot == NULL || htab->root.srelgot == NULL)
9391 abort ();
9392
9393 rela.r_offset = (htab->root.sgot->output_section->vma
9394 + htab->root.sgot->output_offset
9395 + (h->got.offset & ~(bfd_vma) 1));
9396
9397 if (h->def_regular
9398 && h->type == STT_GNU_IFUNC)
9399 {
9400 if (bfd_link_pic (info))
9401 {
9402 /* Generate R_AARCH64_GLOB_DAT. */
9403 goto do_glob_dat;
9404 }
9405 else
9406 {
9407 asection *plt;
9408
9409 if (!h->pointer_equality_needed)
9410 abort ();
9411
9412 /* For non-shared object, we can't use .got.plt, which
9413 contains the real function address if we need pointer
9414 equality. We load the GOT entry with the PLT entry. */
9415 plt = htab->root.splt ? htab->root.splt : htab->root.iplt;
9416 bfd_put_NN (output_bfd, (plt->output_section->vma
9417 + plt->output_offset
9418 + h->plt.offset),
9419 htab->root.sgot->contents
9420 + (h->got.offset & ~(bfd_vma) 1));
9421 return true;
9422 }
9423 }
9424 else if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h))
9425 {
9426 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
9427 return false;
9428
9429 BFD_ASSERT ((h->got.offset & 1) != 0);
9430 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
9431 rela.r_addend = (h->root.u.def.value
9432 + h->root.u.def.section->output_section->vma
9433 + h->root.u.def.section->output_offset);
9434 }
9435 else
9436 {
9437 do_glob_dat:
9438 BFD_ASSERT ((h->got.offset & 1) == 0);
9439 bfd_put_NN (output_bfd, (bfd_vma) 0,
9440 htab->root.sgot->contents + h->got.offset);
9441 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT));
9442 rela.r_addend = 0;
9443 }
9444
9445 loc = htab->root.srelgot->contents;
9446 loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab);
9447 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
9448 }
9449
9450 if (h->needs_copy)
9451 {
9452 Elf_Internal_Rela rela;
9453 asection *s;
9454 bfd_byte *loc;
9455
9456 /* This symbol needs a copy reloc. Set it up. */
9457 if (h->dynindx == -1
9458 || (h->root.type != bfd_link_hash_defined
9459 && h->root.type != bfd_link_hash_defweak)
9460 || htab->root.srelbss == NULL)
9461 abort ();
9462
9463 rela.r_offset = (h->root.u.def.value
9464 + h->root.u.def.section->output_section->vma
9465 + h->root.u.def.section->output_offset);
9466 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY));
9467 rela.r_addend = 0;
9468 if (h->root.u.def.section == htab->root.sdynrelro)
9469 s = htab->root.sreldynrelro;
9470 else
9471 s = htab->root.srelbss;
9472 loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab);
9473 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
9474 }
9475
9476 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
9477 be NULL for local symbols. */
9478 if (sym != NULL
9479 && (h == elf_hash_table (info)->hdynamic
9480 || h == elf_hash_table (info)->hgot))
9481 sym->st_shndx = SHN_ABS;
9482
9483 return true;
9484 }
9485
9486 /* Finish up local dynamic symbol handling. We set the contents of
9487 various dynamic sections here. */
9488
9489 static int
9490 elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf)
9491 {
9492 struct elf_link_hash_entry *h
9493 = (struct elf_link_hash_entry *) *slot;
9494 struct bfd_link_info *info
9495 = (struct bfd_link_info *) inf;
9496
9497 return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd,
9498 info, h, NULL);
9499 }
9500
9501 static void
9502 elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED,
9503 struct elf_aarch64_link_hash_table
9504 *htab)
9505 {
9506 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
9507 small and large plts and at the minute just generates
9508 the small PLT. */
9509
9510 /* PLT0 of the small PLT looks like this in ELF64 -
9511 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
9512 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
9513 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
9514 // symbol resolver
9515 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
9516 // GOTPLT entry for this.
9517 br x17
9518 PLT0 will be slightly different in ELF32 due to different got entry
9519 size. */
9520 bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */
9521 bfd_vma plt_base;
9522
9523
9524 memcpy (htab->root.splt->contents, htab->plt0_entry,
9525 htab->plt_header_size);
9526
9527 /* PR 26312: Explicitly set the sh_entsize to 0 so that
9528 consumers do not think that the section contains fixed
9529 sized objects. */
9530 elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize = 0;
9531
9532 plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma
9533 + htab->root.sgotplt->output_offset
9534 + GOT_ENTRY_SIZE * 2);
9535
9536 plt_base = htab->root.splt->output_section->vma +
9537 htab->root.splt->output_offset;
9538
9539 /* First instruction in BTI enabled PLT stub is a BTI
9540 instruction so skip it. */
9541 bfd_byte *plt0_entry = htab->root.splt->contents;
9542 if (elf_aarch64_tdata (output_bfd)->plt_type & PLT_BTI)
9543 plt0_entry = plt0_entry + 4;
9544
9545 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
9546 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
9547 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
9548 plt0_entry + 4,
9549 PG (plt_got_2nd_ent) - PG (plt_base + 4));
9550
9551 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
9552 plt0_entry + 8,
9553 PG_OFFSET (plt_got_2nd_ent));
9554
9555 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
9556 plt0_entry + 12,
9557 PG_OFFSET (plt_got_2nd_ent));
9558 }
9559
9560 static bool
9561 elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd,
9562 struct bfd_link_info *info)
9563 {
9564 struct elf_aarch64_link_hash_table *htab;
9565 bfd *dynobj;
9566 asection *sdyn;
9567
9568 htab = elf_aarch64_hash_table (info);
9569 dynobj = htab->root.dynobj;
9570 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9571
9572 if (htab->root.dynamic_sections_created)
9573 {
9574 ElfNN_External_Dyn *dyncon, *dynconend;
9575
9576 if (sdyn == NULL || htab->root.sgot == NULL)
9577 abort ();
9578
9579 dyncon = (ElfNN_External_Dyn *) sdyn->contents;
9580 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
9581 for (; dyncon < dynconend; dyncon++)
9582 {
9583 Elf_Internal_Dyn dyn;
9584 asection *s;
9585
9586 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
9587
9588 switch (dyn.d_tag)
9589 {
9590 default:
9591 continue;
9592
9593 case DT_PLTGOT:
9594 s = htab->root.sgotplt;
9595 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9596 break;
9597
9598 case DT_JMPREL:
9599 s = htab->root.srelplt;
9600 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9601 break;
9602
9603 case DT_PLTRELSZ:
9604 s = htab->root.srelplt;
9605 dyn.d_un.d_val = s->size;
9606 break;
9607
9608 case DT_TLSDESC_PLT:
9609 s = htab->root.splt;
9610 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
9611 + htab->root.tlsdesc_plt;
9612 break;
9613
9614 case DT_TLSDESC_GOT:
9615 s = htab->root.sgot;
9616 BFD_ASSERT (htab->root.tlsdesc_got != (bfd_vma)-1);
9617 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
9618 + htab->root.tlsdesc_got;
9619 break;
9620 }
9621
9622 bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon);
9623 }
9624
9625 }
9626
9627 /* Fill in the special first entry in the procedure linkage table. */
9628 if (htab->root.splt && htab->root.splt->size > 0)
9629 {
9630 elfNN_aarch64_init_small_plt0_entry (output_bfd, htab);
9631
9632 if (htab->root.tlsdesc_plt && !(info->flags & DF_BIND_NOW))
9633 {
9634 BFD_ASSERT (htab->root.tlsdesc_got != (bfd_vma)-1);
9635 bfd_put_NN (output_bfd, (bfd_vma) 0,
9636 htab->root.sgot->contents + htab->root.tlsdesc_got);
9637
9638 const bfd_byte *entry = elfNN_aarch64_tlsdesc_small_plt_entry;
9639 htab->tlsdesc_plt_entry_size = PLT_TLSDESC_ENTRY_SIZE;
9640
9641 aarch64_plt_type type = elf_aarch64_tdata (output_bfd)->plt_type;
9642 if (type == PLT_BTI || type == PLT_BTI_PAC)
9643 {
9644 entry = elfNN_aarch64_tlsdesc_small_plt_bti_entry;
9645 }
9646
9647 memcpy (htab->root.splt->contents + htab->root.tlsdesc_plt,
9648 entry, htab->tlsdesc_plt_entry_size);
9649
9650 {
9651 bfd_vma adrp1_addr =
9652 htab->root.splt->output_section->vma
9653 + htab->root.splt->output_offset
9654 + htab->root.tlsdesc_plt + 4;
9655
9656 bfd_vma adrp2_addr = adrp1_addr + 4;
9657
9658 bfd_vma got_addr =
9659 htab->root.sgot->output_section->vma
9660 + htab->root.sgot->output_offset;
9661
9662 bfd_vma pltgot_addr =
9663 htab->root.sgotplt->output_section->vma
9664 + htab->root.sgotplt->output_offset;
9665
9666 bfd_vma dt_tlsdesc_got = got_addr + htab->root.tlsdesc_got;
9667
9668 bfd_byte *plt_entry =
9669 htab->root.splt->contents + htab->root.tlsdesc_plt;
9670
9671 /* First instruction in BTI enabled PLT stub is a BTI
9672 instruction so skip it. */
9673 if (type & PLT_BTI)
9674 {
9675 plt_entry = plt_entry + 4;
9676 adrp1_addr = adrp1_addr + 4;
9677 adrp2_addr = adrp2_addr + 4;
9678 }
9679
9680 /* adrp x2, DT_TLSDESC_GOT */
9681 elf_aarch64_update_plt_entry (output_bfd,
9682 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
9683 plt_entry + 4,
9684 (PG (dt_tlsdesc_got)
9685 - PG (adrp1_addr)));
9686
9687 /* adrp x3, 0 */
9688 elf_aarch64_update_plt_entry (output_bfd,
9689 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
9690 plt_entry + 8,
9691 (PG (pltgot_addr)
9692 - PG (adrp2_addr)));
9693
9694 /* ldr x2, [x2, #0] */
9695 elf_aarch64_update_plt_entry (output_bfd,
9696 BFD_RELOC_AARCH64_LDSTNN_LO12,
9697 plt_entry + 12,
9698 PG_OFFSET (dt_tlsdesc_got));
9699
9700 /* add x3, x3, 0 */
9701 elf_aarch64_update_plt_entry (output_bfd,
9702 BFD_RELOC_AARCH64_ADD_LO12,
9703 plt_entry + 16,
9704 PG_OFFSET (pltgot_addr));
9705 }
9706 }
9707 }
9708
9709 if (htab->root.sgotplt)
9710 {
9711 if (bfd_is_abs_section (htab->root.sgotplt->output_section))
9712 {
9713 _bfd_error_handler
9714 (_("discarded output section: `%pA'"), htab->root.sgotplt);
9715 return false;
9716 }
9717
9718 /* Fill in the first three entries in the global offset table. */
9719 if (htab->root.sgotplt->size > 0)
9720 {
9721 bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents);
9722
9723 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
9724 bfd_put_NN (output_bfd,
9725 (bfd_vma) 0,
9726 htab->root.sgotplt->contents + GOT_ENTRY_SIZE);
9727 bfd_put_NN (output_bfd,
9728 (bfd_vma) 0,
9729 htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2);
9730 }
9731
9732 if (htab->root.sgot)
9733 {
9734 if (htab->root.sgot->size > 0)
9735 {
9736 bfd_vma addr =
9737 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0;
9738 bfd_put_NN (output_bfd, addr, htab->root.sgot->contents);
9739 }
9740 }
9741
9742 elf_section_data (htab->root.sgotplt->output_section)->
9743 this_hdr.sh_entsize = GOT_ENTRY_SIZE;
9744 }
9745
9746 if (htab->root.sgot && htab->root.sgot->size > 0)
9747 elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize
9748 = GOT_ENTRY_SIZE;
9749
9750 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
9751 htab_traverse (htab->loc_hash_table,
9752 elfNN_aarch64_finish_local_dynamic_symbol,
9753 info);
9754
9755 return true;
9756 }
9757
9758 /* Check if BTI enabled PLTs are needed. Returns the type needed. */
9759 static aarch64_plt_type
9760 get_plt_type (bfd *abfd)
9761 {
9762 aarch64_plt_type ret = PLT_NORMAL;
9763 bfd_byte *contents, *extdyn, *extdynend;
9764 asection *sec = bfd_get_section_by_name (abfd, ".dynamic");
9765 if (!sec
9766 || sec->size < sizeof (ElfNN_External_Dyn)
9767 || !bfd_malloc_and_get_section (abfd, sec, &contents))
9768 return ret;
9769 extdyn = contents;
9770 extdynend = contents + sec->size - sizeof (ElfNN_External_Dyn);
9771 for (; extdyn <= extdynend; extdyn += sizeof (ElfNN_External_Dyn))
9772 {
9773 Elf_Internal_Dyn dyn;
9774 bfd_elfNN_swap_dyn_in (abfd, extdyn, &dyn);
9775
9776 /* Let's check the processor specific dynamic array tags. */
9777 bfd_vma tag = dyn.d_tag;
9778 if (tag < DT_LOPROC || tag > DT_HIPROC)
9779 continue;
9780
9781 switch (tag)
9782 {
9783 case DT_AARCH64_BTI_PLT:
9784 ret |= PLT_BTI;
9785 break;
9786
9787 case DT_AARCH64_PAC_PLT:
9788 ret |= PLT_PAC;
9789 break;
9790
9791 default: break;
9792 }
9793 }
9794 free (contents);
9795 return ret;
9796 }
9797
9798 static long
9799 elfNN_aarch64_get_synthetic_symtab (bfd *abfd,
9800 long symcount,
9801 asymbol **syms,
9802 long dynsymcount,
9803 asymbol **dynsyms,
9804 asymbol **ret)
9805 {
9806 elf_aarch64_tdata (abfd)->plt_type = get_plt_type (abfd);
9807 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
9808 dynsymcount, dynsyms, ret);
9809 }
9810
9811 /* Return address for Ith PLT stub in section PLT, for relocation REL
9812 or (bfd_vma) -1 if it should not be included. */
9813
9814 static bfd_vma
9815 elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt,
9816 const arelent *rel ATTRIBUTE_UNUSED)
9817 {
9818 size_t plt0_size = PLT_ENTRY_SIZE;
9819 size_t pltn_size = PLT_SMALL_ENTRY_SIZE;
9820
9821 if (elf_aarch64_tdata (plt->owner)->plt_type == PLT_BTI_PAC)
9822 {
9823 if (elf_elfheader (plt->owner)->e_type == ET_EXEC)
9824 pltn_size = PLT_BTI_PAC_SMALL_ENTRY_SIZE;
9825 else
9826 pltn_size = PLT_PAC_SMALL_ENTRY_SIZE;
9827 }
9828 else if (elf_aarch64_tdata (plt->owner)->plt_type == PLT_BTI)
9829 {
9830 if (elf_elfheader (plt->owner)->e_type == ET_EXEC)
9831 pltn_size = PLT_BTI_SMALL_ENTRY_SIZE;
9832 }
9833 else if (elf_aarch64_tdata (plt->owner)->plt_type == PLT_PAC)
9834 {
9835 pltn_size = PLT_PAC_SMALL_ENTRY_SIZE;
9836 }
9837
9838 return plt->vma + plt0_size + i * pltn_size;
9839 }
9840
9841 /* Returns TRUE if NAME is an AArch64 mapping symbol.
9842 The ARM ELF standard defines $x (for A64 code) and $d (for data).
9843 It also allows a period initiated suffix to be added to the symbol, ie:
9844 "$[adtx]\.[:sym_char]+". */
9845
9846 static bool
9847 is_aarch64_mapping_symbol (const char * name)
9848 {
9849 return name != NULL /* Paranoia. */
9850 && name[0] == '$' /* Note: if objcopy --prefix-symbols has been used then
9851 the mapping symbols could have acquired a prefix.
9852 We do not support this here, since such symbols no
9853 longer conform to the ARM ELF ABI. */
9854 && (name[1] == 'd' || name[1] == 'x')
9855 && (name[2] == 0 || name[2] == '.');
9856 /* FIXME: Strictly speaking the symbol is only a valid mapping symbol if
9857 any characters that follow the period are legal characters for the body
9858 of a symbol's name. For now we just assume that this is the case. */
9859 }
9860
9861 /* Make sure that mapping symbols in object files are not removed via the
9862 "strip --strip-unneeded" tool. These symbols might needed in order to
9863 correctly generate linked files. Once an object file has been linked,
9864 it should be safe to remove them. */
9865
9866 static void
9867 elfNN_aarch64_backend_symbol_processing (bfd *abfd, asymbol *sym)
9868 {
9869 if (((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
9870 && sym->section != bfd_abs_section_ptr
9871 && is_aarch64_mapping_symbol (sym->name))
9872 sym->flags |= BSF_KEEP;
9873 }
9874
9875 /* Implement elf_backend_setup_gnu_properties for AArch64. It serves as a
9876 wrapper function for _bfd_aarch64_elf_link_setup_gnu_properties to account
9877 for the effect of GNU properties of the output_bfd. */
9878 static bfd *
9879 elfNN_aarch64_link_setup_gnu_properties (struct bfd_link_info *info)
9880 {
9881 uint32_t prop = elf_aarch64_tdata (info->output_bfd)->gnu_and_prop;
9882 bfd *pbfd = _bfd_aarch64_elf_link_setup_gnu_properties (info, &prop);
9883 elf_aarch64_tdata (info->output_bfd)->gnu_and_prop = prop;
9884 elf_aarch64_tdata (info->output_bfd)->plt_type
9885 |= (prop & GNU_PROPERTY_AARCH64_FEATURE_1_BTI) ? PLT_BTI : 0;
9886 setup_plt_values (info, elf_aarch64_tdata (info->output_bfd)->plt_type);
9887 return pbfd;
9888 }
9889
9890 /* Implement elf_backend_merge_gnu_properties for AArch64. It serves as a
9891 wrapper function for _bfd_aarch64_elf_merge_gnu_properties to account
9892 for the effect of GNU properties of the output_bfd. */
9893 static bool
9894 elfNN_aarch64_merge_gnu_properties (struct bfd_link_info *info,
9895 bfd *abfd, bfd *bbfd,
9896 elf_property *aprop,
9897 elf_property *bprop)
9898 {
9899 uint32_t prop
9900 = elf_aarch64_tdata (info->output_bfd)->gnu_and_prop;
9901
9902 /* If output has been marked with BTI using command line argument, give out
9903 warning if necessary. */
9904 /* Properties are merged per type, hence only check for warnings when merging
9905 GNU_PROPERTY_AARCH64_FEATURE_1_AND. */
9906 if (((aprop && aprop->pr_type == GNU_PROPERTY_AARCH64_FEATURE_1_AND)
9907 || (bprop && bprop->pr_type == GNU_PROPERTY_AARCH64_FEATURE_1_AND))
9908 && (prop & GNU_PROPERTY_AARCH64_FEATURE_1_BTI)
9909 && (!elf_aarch64_tdata (info->output_bfd)->no_bti_warn))
9910 {
9911 if ((aprop && !(aprop->u.number & GNU_PROPERTY_AARCH64_FEATURE_1_BTI))
9912 || !aprop)
9913 {
9914 _bfd_error_handler (_("%pB: warning: BTI turned on by -z force-bti when "
9915 "all inputs do not have BTI in NOTE section."),
9916 abfd);
9917 }
9918 if ((bprop && !(bprop->u.number & GNU_PROPERTY_AARCH64_FEATURE_1_BTI))
9919 || !bprop)
9920 {
9921 _bfd_error_handler (_("%pB: warning: BTI turned on by -z force-bti when "
9922 "all inputs do not have BTI in NOTE section."),
9923 bbfd);
9924 }
9925 }
9926
9927 return _bfd_aarch64_elf_merge_gnu_properties (info, abfd, aprop,
9928 bprop, prop);
9929 }
9930
9931 /* We use this so we can override certain functions
9932 (though currently we don't). */
9933
9934 const struct elf_size_info elfNN_aarch64_size_info =
9935 {
9936 sizeof (ElfNN_External_Ehdr),
9937 sizeof (ElfNN_External_Phdr),
9938 sizeof (ElfNN_External_Shdr),
9939 sizeof (ElfNN_External_Rel),
9940 sizeof (ElfNN_External_Rela),
9941 sizeof (ElfNN_External_Sym),
9942 sizeof (ElfNN_External_Dyn),
9943 sizeof (Elf_External_Note),
9944 4, /* Hash table entry size. */
9945 1, /* Internal relocs per external relocs. */
9946 ARCH_SIZE, /* Arch size. */
9947 LOG_FILE_ALIGN, /* Log_file_align. */
9948 ELFCLASSNN, EV_CURRENT,
9949 bfd_elfNN_write_out_phdrs,
9950 bfd_elfNN_write_shdrs_and_ehdr,
9951 bfd_elfNN_checksum_contents,
9952 bfd_elfNN_write_relocs,
9953 bfd_elfNN_swap_symbol_in,
9954 bfd_elfNN_swap_symbol_out,
9955 bfd_elfNN_slurp_reloc_table,
9956 bfd_elfNN_slurp_symbol_table,
9957 bfd_elfNN_swap_dyn_in,
9958 bfd_elfNN_swap_dyn_out,
9959 bfd_elfNN_swap_reloc_in,
9960 bfd_elfNN_swap_reloc_out,
9961 bfd_elfNN_swap_reloca_in,
9962 bfd_elfNN_swap_reloca_out
9963 };
9964
9965 #define ELF_ARCH bfd_arch_aarch64
9966 #define ELF_MACHINE_CODE EM_AARCH64
9967 #define ELF_MAXPAGESIZE 0x10000
9968 #define ELF_COMMONPAGESIZE 0x1000
9969
9970 #define bfd_elfNN_close_and_cleanup \
9971 elfNN_aarch64_close_and_cleanup
9972
9973 #define bfd_elfNN_bfd_free_cached_info \
9974 elfNN_aarch64_bfd_free_cached_info
9975
9976 #define bfd_elfNN_bfd_is_target_special_symbol \
9977 elfNN_aarch64_is_target_special_symbol
9978
9979 #define bfd_elfNN_bfd_link_hash_table_create \
9980 elfNN_aarch64_link_hash_table_create
9981
9982 #define bfd_elfNN_bfd_merge_private_bfd_data \
9983 elfNN_aarch64_merge_private_bfd_data
9984
9985 #define bfd_elfNN_bfd_print_private_bfd_data \
9986 elfNN_aarch64_print_private_bfd_data
9987
9988 #define bfd_elfNN_bfd_reloc_type_lookup \
9989 elfNN_aarch64_reloc_type_lookup
9990
9991 #define bfd_elfNN_bfd_reloc_name_lookup \
9992 elfNN_aarch64_reloc_name_lookup
9993
9994 #define bfd_elfNN_bfd_set_private_flags \
9995 elfNN_aarch64_set_private_flags
9996
9997 #define bfd_elfNN_find_inliner_info \
9998 elfNN_aarch64_find_inliner_info
9999
10000 #define bfd_elfNN_get_synthetic_symtab \
10001 elfNN_aarch64_get_synthetic_symtab
10002
10003 #define bfd_elfNN_mkobject \
10004 elfNN_aarch64_mkobject
10005
10006 #define bfd_elfNN_new_section_hook \
10007 elfNN_aarch64_new_section_hook
10008
10009 #define elf_backend_adjust_dynamic_symbol \
10010 elfNN_aarch64_adjust_dynamic_symbol
10011
10012 #define elf_backend_always_size_sections \
10013 elfNN_aarch64_always_size_sections
10014
10015 #define elf_backend_check_relocs \
10016 elfNN_aarch64_check_relocs
10017
10018 #define elf_backend_copy_indirect_symbol \
10019 elfNN_aarch64_copy_indirect_symbol
10020
10021 #define elf_backend_merge_symbol_attribute \
10022 elfNN_aarch64_merge_symbol_attribute
10023
10024 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
10025 to them in our hash. */
10026 #define elf_backend_create_dynamic_sections \
10027 elfNN_aarch64_create_dynamic_sections
10028
10029 #define elf_backend_init_index_section \
10030 _bfd_elf_init_2_index_sections
10031
10032 #define elf_backend_finish_dynamic_sections \
10033 elfNN_aarch64_finish_dynamic_sections
10034
10035 #define elf_backend_finish_dynamic_symbol \
10036 elfNN_aarch64_finish_dynamic_symbol
10037
10038 #define elf_backend_object_p \
10039 elfNN_aarch64_object_p
10040
10041 #define elf_backend_output_arch_local_syms \
10042 elfNN_aarch64_output_arch_local_syms
10043
10044 #define elf_backend_maybe_function_sym \
10045 elfNN_aarch64_maybe_function_sym
10046
10047 #define elf_backend_plt_sym_val \
10048 elfNN_aarch64_plt_sym_val
10049
10050 #define elf_backend_init_file_header \
10051 elfNN_aarch64_init_file_header
10052
10053 #define elf_backend_relocate_section \
10054 elfNN_aarch64_relocate_section
10055
10056 #define elf_backend_reloc_type_class \
10057 elfNN_aarch64_reloc_type_class
10058
10059 #define elf_backend_section_from_shdr \
10060 elfNN_aarch64_section_from_shdr
10061
10062 #define elf_backend_size_dynamic_sections \
10063 elfNN_aarch64_size_dynamic_sections
10064
10065 #define elf_backend_size_info \
10066 elfNN_aarch64_size_info
10067
10068 #define elf_backend_write_section \
10069 elfNN_aarch64_write_section
10070
10071 #define elf_backend_symbol_processing \
10072 elfNN_aarch64_backend_symbol_processing
10073
10074 #define elf_backend_setup_gnu_properties \
10075 elfNN_aarch64_link_setup_gnu_properties
10076
10077 #define elf_backend_merge_gnu_properties \
10078 elfNN_aarch64_merge_gnu_properties
10079
10080 #define elf_backend_can_refcount 1
10081 #define elf_backend_can_gc_sections 1
10082 #define elf_backend_plt_readonly 1
10083 #define elf_backend_want_got_plt 1
10084 #define elf_backend_want_plt_sym 0
10085 #define elf_backend_want_dynrelro 1
10086 #define elf_backend_may_use_rel_p 0
10087 #define elf_backend_may_use_rela_p 1
10088 #define elf_backend_default_use_rela_p 1
10089 #define elf_backend_rela_normal 1
10090 #define elf_backend_dtrel_excludes_plt 1
10091 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
10092 #define elf_backend_default_execstack 0
10093 #define elf_backend_extern_protected_data 1
10094 #define elf_backend_hash_symbol elf_aarch64_hash_symbol
10095
10096 #undef elf_backend_obj_attrs_section
10097 #define elf_backend_obj_attrs_section ".ARM.attributes"
10098
10099 #include "elfNN-target.h"
10100
10101 /* CloudABI support. */
10102
10103 #undef TARGET_LITTLE_SYM
10104 #define TARGET_LITTLE_SYM aarch64_elfNN_le_cloudabi_vec
10105 #undef TARGET_LITTLE_NAME
10106 #define TARGET_LITTLE_NAME "elfNN-littleaarch64-cloudabi"
10107 #undef TARGET_BIG_SYM
10108 #define TARGET_BIG_SYM aarch64_elfNN_be_cloudabi_vec
10109 #undef TARGET_BIG_NAME
10110 #define TARGET_BIG_NAME "elfNN-bigaarch64-cloudabi"
10111
10112 #undef ELF_OSABI
10113 #define ELF_OSABI ELFOSABI_CLOUDABI
10114
10115 #undef elfNN_bed
10116 #define elfNN_bed elfNN_aarch64_cloudabi_bed
10117
10118 #include "elfNN-target.h"
blckswans binutils fork