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cec5225b YZ |
1 | /* AArch64-specific support for NN-bit ELF. |
2 | Copyright 2009-2013 Free Software Foundation, Inc. | |
a06ea964 NC |
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 | ||
418009c2 | 43 | adrp x0, :tlsdesc:foo R_AARCH64_TLSDESC_ADR_PAGE21(foo) |
a06ea964 NC |
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 | ||
a6bb11b2 | 53 | The relocations R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC} |
a06ea964 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 | |
a6bb11b2 | 67 | entries. The static linker places the relocation R_AARCH64_TLS_DTPMOD |
a06ea964 NC |
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 | |
a6bb11b2 | 72 | R_AARCH64_TLS_DTPREL relocation on the offset entry. The loader |
a06ea964 NC |
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 | ||
cec5225b | 95 | elfNN_aarch64_check_relocs() |
a06ea964 NC |
96 | |
97 | This function is invoked for each relocation. | |
98 | ||
99 | The TLS relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} and | |
a6bb11b2 | 100 | R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC} are |
a06ea964 NC |
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 | ||
cec5225b | 107 | elfNN_aarch64_allocate_dynrelocs () |
a06ea964 NC |
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 | ||
cec5225b | 115 | elfNN_aarch64_size_dynamic_sections () |
a06ea964 NC |
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 | ||
cec5225b | 122 | elfNN_aarch64_relocate_section () |
a06ea964 | 123 | |
cec5225b | 124 | Calls elfNN_aarch64_final_link_relocate () |
a06ea964 NC |
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 | ||
cec5225b | 134 | elfNN_aarch64_final_link_relocate () |
a06ea964 NC |
135 | |
136 | Fixup the R_AARCH64_TLSGD_{ADR_PREL21, ADD_LO12_NC} relocations. */ | |
137 | ||
138 | #include "sysdep.h" | |
139 | #include "bfd.h" | |
140 | #include "libiberty.h" | |
141 | #include "libbfd.h" | |
142 | #include "bfd_stdint.h" | |
143 | #include "elf-bfd.h" | |
144 | #include "bfdlink.h" | |
1419bbe5 | 145 | #include "objalloc.h" |
a06ea964 | 146 | #include "elf/aarch64.h" |
caed7120 | 147 | #include "elfxx-aarch64.h" |
a06ea964 | 148 | |
cec5225b YZ |
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 | |
a6bb11b2 YZ |
154 | #define HOWTO64(...) HOWTO (__VA_ARGS__) |
155 | #define HOWTO32(...) EMPTY_HOWTO (0) | |
cec5225b YZ |
156 | #define LOG_FILE_ALIGN 3 |
157 | #endif | |
158 | ||
159 | #if ARCH_SIZE == 32 | |
160 | #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME | |
161 | #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME | |
a6bb11b2 YZ |
162 | #define HOWTO64(...) EMPTY_HOWTO (0) |
163 | #define HOWTO32(...) HOWTO (__VA_ARGS__) | |
cec5225b YZ |
164 | #define LOG_FILE_ALIGN 2 |
165 | #endif | |
166 | ||
a6bb11b2 YZ |
167 | #define IS_AARCH64_TLS_RELOC(R_TYPE) \ |
168 | ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \ | |
169 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \ | |
170 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \ | |
171 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \ | |
172 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \ | |
173 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \ | |
174 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \ | |
175 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \ | |
176 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \ | |
177 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \ | |
178 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \ | |
179 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \ | |
180 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \ | |
181 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \ | |
182 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \ | |
183 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \ | |
184 | || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \ | |
185 | || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \ | |
186 | || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \ | |
a06ea964 NC |
187 | || IS_AARCH64_TLSDESC_RELOC ((R_TYPE))) |
188 | ||
a6bb11b2 YZ |
189 | #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \ |
190 | ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \ | |
191 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \ | |
192 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \ | |
193 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \ | |
194 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC \ | |
195 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \ | |
196 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \ | |
197 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \ | |
198 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \ | |
199 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \ | |
200 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \ | |
201 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC) | |
a06ea964 NC |
202 | |
203 | #define ELIMINATE_COPY_RELOCS 0 | |
204 | ||
a06ea964 | 205 | /* Return size of a relocation entry. HTAB is the bfd's |
cec5225b YZ |
206 | elf_aarch64_link_hash_entry. */ |
207 | #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela)) | |
a06ea964 | 208 | |
cec5225b YZ |
209 | /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */ |
210 | #define GOT_ENTRY_SIZE (ARCH_SIZE / 8) | |
a06ea964 NC |
211 | #define PLT_ENTRY_SIZE (32) |
212 | #define PLT_SMALL_ENTRY_SIZE (16) | |
213 | #define PLT_TLSDESC_ENTRY_SIZE (32) | |
214 | ||
a06ea964 NC |
215 | /* Encoding of the nop instruction */ |
216 | #define INSN_NOP 0xd503201f | |
217 | ||
218 | #define aarch64_compute_jump_table_size(htab) \ | |
219 | (((htab)->root.srelplt == NULL) ? 0 \ | |
220 | : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE) | |
221 | ||
222 | /* The first entry in a procedure linkage table looks like this | |
223 | if the distance between the PLTGOT and the PLT is < 4GB use | |
224 | these PLT entries. Note that the dynamic linker gets &PLTGOT[2] | |
225 | in x16 and needs to work out PLTGOT[1] by using an address of | |
cec5225b YZ |
226 | [x16,#-GOT_ENTRY_SIZE]. */ |
227 | static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] = | |
a06ea964 NC |
228 | { |
229 | 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */ | |
230 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */ | |
caed7120 | 231 | #if ARCH_SIZE == 64 |
a06ea964 NC |
232 | 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */ |
233 | 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */ | |
caed7120 YZ |
234 | #else |
235 | 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */ | |
236 | 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */ | |
237 | #endif | |
a06ea964 NC |
238 | 0x20, 0x02, 0x1f, 0xd6, /* br x17 */ |
239 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
240 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
241 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
242 | }; | |
243 | ||
244 | /* Per function entry in a procedure linkage table looks like this | |
245 | if the distance between the PLTGOT and the PLT is < 4GB use | |
246 | these PLT entries. */ | |
cec5225b | 247 | static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] = |
a06ea964 NC |
248 | { |
249 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */ | |
caed7120 | 250 | #if ARCH_SIZE == 64 |
a06ea964 NC |
251 | 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */ |
252 | 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */ | |
caed7120 YZ |
253 | #else |
254 | 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */ | |
255 | 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */ | |
256 | #endif | |
a06ea964 NC |
257 | 0x20, 0x02, 0x1f, 0xd6, /* br x17. */ |
258 | }; | |
259 | ||
260 | static const bfd_byte | |
cec5225b | 261 | elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] = |
a06ea964 NC |
262 | { |
263 | 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */ | |
264 | 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */ | |
265 | 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */ | |
caed7120 YZ |
266 | #if ARCH_SIZE == 64 |
267 | 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */ | |
a06ea964 | 268 | 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */ |
caed7120 YZ |
269 | #else |
270 | 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */ | |
271 | 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */ | |
272 | #endif | |
273 | 0x40, 0x00, 0x1f, 0xd6, /* br x2 */ | |
a06ea964 NC |
274 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
275 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
276 | }; | |
277 | ||
cec5225b YZ |
278 | #define elf_info_to_howto elfNN_aarch64_info_to_howto |
279 | #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto | |
a06ea964 NC |
280 | |
281 | #define AARCH64_ELF_ABI_VERSION 0 | |
a06ea964 NC |
282 | |
283 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ | |
284 | #define ALL_ONES (~ (bfd_vma) 0) | |
285 | ||
a6bb11b2 YZ |
286 | /* Indexed by the bfd interal reloc enumerators. |
287 | Therefore, the table needs to be synced with BFD_RELOC_AARCH64_* | |
288 | in reloc.c. */ | |
a06ea964 | 289 | |
a6bb11b2 | 290 | static reloc_howto_type elfNN_aarch64_howto_table[] = |
a06ea964 | 291 | { |
a6bb11b2 | 292 | EMPTY_HOWTO (0), |
a06ea964 | 293 | |
a6bb11b2 | 294 | /* Basic data relocations. */ |
a06ea964 | 295 | |
a6bb11b2 YZ |
296 | #if ARCH_SIZE == 64 |
297 | HOWTO (R_AARCH64_NULL, /* type */ | |
a06ea964 | 298 | 0, /* rightshift */ |
a6bb11b2 YZ |
299 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
300 | 0, /* bitsize */ | |
a06ea964 NC |
301 | FALSE, /* pc_relative */ |
302 | 0, /* bitpos */ | |
303 | complain_overflow_dont, /* complain_on_overflow */ | |
304 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 305 | "R_AARCH64_NULL", /* name */ |
a06ea964 NC |
306 | FALSE, /* partial_inplace */ |
307 | 0, /* src_mask */ | |
a6bb11b2 | 308 | 0, /* dst_mask */ |
a06ea964 | 309 | FALSE), /* pcrel_offset */ |
a6bb11b2 YZ |
310 | #else |
311 | HOWTO (R_AARCH64_NONE, /* type */ | |
a06ea964 NC |
312 | 0, /* rightshift */ |
313 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
314 | 0, /* bitsize */ | |
315 | FALSE, /* pc_relative */ | |
316 | 0, /* bitpos */ | |
317 | complain_overflow_dont, /* complain_on_overflow */ | |
318 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 319 | "R_AARCH64_NONE", /* name */ |
a06ea964 NC |
320 | FALSE, /* partial_inplace */ |
321 | 0, /* src_mask */ | |
322 | 0, /* dst_mask */ | |
323 | FALSE), /* pcrel_offset */ | |
a6bb11b2 | 324 | #endif |
a06ea964 NC |
325 | |
326 | /* .xword: (S+A) */ | |
a6bb11b2 | 327 | HOWTO64 (AARCH64_R (ABS64), /* type */ |
a06ea964 NC |
328 | 0, /* rightshift */ |
329 | 4, /* size (4 = long long) */ | |
330 | 64, /* bitsize */ | |
331 | FALSE, /* pc_relative */ | |
332 | 0, /* bitpos */ | |
333 | complain_overflow_unsigned, /* complain_on_overflow */ | |
334 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 335 | AARCH64_R_STR (ABS64), /* name */ |
a06ea964 NC |
336 | FALSE, /* partial_inplace */ |
337 | ALL_ONES, /* src_mask */ | |
338 | ALL_ONES, /* dst_mask */ | |
339 | FALSE), /* pcrel_offset */ | |
340 | ||
341 | /* .word: (S+A) */ | |
a6bb11b2 | 342 | HOWTO (AARCH64_R (ABS32), /* type */ |
a06ea964 NC |
343 | 0, /* rightshift */ |
344 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
345 | 32, /* bitsize */ | |
346 | FALSE, /* pc_relative */ | |
347 | 0, /* bitpos */ | |
348 | complain_overflow_unsigned, /* complain_on_overflow */ | |
349 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 350 | AARCH64_R_STR (ABS32), /* name */ |
a06ea964 NC |
351 | FALSE, /* partial_inplace */ |
352 | 0xffffffff, /* src_mask */ | |
353 | 0xffffffff, /* dst_mask */ | |
354 | FALSE), /* pcrel_offset */ | |
355 | ||
356 | /* .half: (S+A) */ | |
a6bb11b2 | 357 | HOWTO (AARCH64_R (ABS16), /* type */ |
a06ea964 NC |
358 | 0, /* rightshift */ |
359 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
360 | 16, /* bitsize */ | |
361 | FALSE, /* pc_relative */ | |
362 | 0, /* bitpos */ | |
363 | complain_overflow_unsigned, /* complain_on_overflow */ | |
364 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 365 | AARCH64_R_STR (ABS16), /* name */ |
a06ea964 NC |
366 | FALSE, /* partial_inplace */ |
367 | 0xffff, /* src_mask */ | |
368 | 0xffff, /* dst_mask */ | |
369 | FALSE), /* pcrel_offset */ | |
370 | ||
371 | /* .xword: (S+A-P) */ | |
a6bb11b2 | 372 | HOWTO64 (AARCH64_R (PREL64), /* type */ |
a06ea964 NC |
373 | 0, /* rightshift */ |
374 | 4, /* size (4 = long long) */ | |
375 | 64, /* bitsize */ | |
376 | TRUE, /* pc_relative */ | |
377 | 0, /* bitpos */ | |
378 | complain_overflow_signed, /* complain_on_overflow */ | |
379 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 380 | AARCH64_R_STR (PREL64), /* name */ |
a06ea964 NC |
381 | FALSE, /* partial_inplace */ |
382 | ALL_ONES, /* src_mask */ | |
383 | ALL_ONES, /* dst_mask */ | |
384 | TRUE), /* pcrel_offset */ | |
385 | ||
386 | /* .word: (S+A-P) */ | |
a6bb11b2 | 387 | HOWTO (AARCH64_R (PREL32), /* type */ |
a06ea964 NC |
388 | 0, /* rightshift */ |
389 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
390 | 32, /* bitsize */ | |
391 | TRUE, /* pc_relative */ | |
392 | 0, /* bitpos */ | |
393 | complain_overflow_signed, /* complain_on_overflow */ | |
394 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 395 | AARCH64_R_STR (PREL32), /* name */ |
a06ea964 NC |
396 | FALSE, /* partial_inplace */ |
397 | 0xffffffff, /* src_mask */ | |
398 | 0xffffffff, /* dst_mask */ | |
399 | TRUE), /* pcrel_offset */ | |
400 | ||
401 | /* .half: (S+A-P) */ | |
a6bb11b2 | 402 | HOWTO (AARCH64_R (PREL16), /* type */ |
a06ea964 NC |
403 | 0, /* rightshift */ |
404 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
405 | 16, /* bitsize */ | |
406 | TRUE, /* pc_relative */ | |
407 | 0, /* bitpos */ | |
408 | complain_overflow_signed, /* complain_on_overflow */ | |
409 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 410 | AARCH64_R_STR (PREL16), /* name */ |
a06ea964 NC |
411 | FALSE, /* partial_inplace */ |
412 | 0xffff, /* src_mask */ | |
413 | 0xffff, /* dst_mask */ | |
414 | TRUE), /* pcrel_offset */ | |
415 | ||
416 | /* Group relocations to create a 16, 32, 48 or 64 bit | |
417 | unsigned data or abs address inline. */ | |
418 | ||
419 | /* MOVZ: ((S+A) >> 0) & 0xffff */ | |
a6bb11b2 | 420 | HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */ |
a06ea964 NC |
421 | 0, /* rightshift */ |
422 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
423 | 16, /* bitsize */ | |
424 | FALSE, /* pc_relative */ | |
425 | 0, /* bitpos */ | |
426 | complain_overflow_unsigned, /* complain_on_overflow */ | |
427 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 428 | AARCH64_R_STR (MOVW_UABS_G0), /* name */ |
a06ea964 NC |
429 | FALSE, /* partial_inplace */ |
430 | 0xffff, /* src_mask */ | |
431 | 0xffff, /* dst_mask */ | |
432 | FALSE), /* pcrel_offset */ | |
433 | ||
434 | /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */ | |
a6bb11b2 | 435 | HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */ |
a06ea964 NC |
436 | 0, /* rightshift */ |
437 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
438 | 16, /* bitsize */ | |
439 | FALSE, /* pc_relative */ | |
440 | 0, /* bitpos */ | |
441 | complain_overflow_dont, /* complain_on_overflow */ | |
442 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 443 | AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */ |
a06ea964 NC |
444 | FALSE, /* partial_inplace */ |
445 | 0xffff, /* src_mask */ | |
446 | 0xffff, /* dst_mask */ | |
447 | FALSE), /* pcrel_offset */ | |
448 | ||
449 | /* MOVZ: ((S+A) >> 16) & 0xffff */ | |
a6bb11b2 | 450 | HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */ |
a06ea964 NC |
451 | 16, /* rightshift */ |
452 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
453 | 16, /* bitsize */ | |
454 | FALSE, /* pc_relative */ | |
455 | 0, /* bitpos */ | |
456 | complain_overflow_unsigned, /* complain_on_overflow */ | |
457 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 458 | AARCH64_R_STR (MOVW_UABS_G1), /* name */ |
a06ea964 NC |
459 | FALSE, /* partial_inplace */ |
460 | 0xffff, /* src_mask */ | |
461 | 0xffff, /* dst_mask */ | |
462 | FALSE), /* pcrel_offset */ | |
463 | ||
464 | /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */ | |
a6bb11b2 | 465 | HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */ |
a06ea964 NC |
466 | 16, /* rightshift */ |
467 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
468 | 16, /* bitsize */ | |
469 | FALSE, /* pc_relative */ | |
470 | 0, /* bitpos */ | |
471 | complain_overflow_dont, /* complain_on_overflow */ | |
472 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 473 | AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */ |
a06ea964 NC |
474 | FALSE, /* partial_inplace */ |
475 | 0xffff, /* src_mask */ | |
476 | 0xffff, /* dst_mask */ | |
477 | FALSE), /* pcrel_offset */ | |
478 | ||
479 | /* MOVZ: ((S+A) >> 32) & 0xffff */ | |
a6bb11b2 | 480 | HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */ |
a06ea964 NC |
481 | 32, /* rightshift */ |
482 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
483 | 16, /* bitsize */ | |
484 | FALSE, /* pc_relative */ | |
485 | 0, /* bitpos */ | |
486 | complain_overflow_unsigned, /* complain_on_overflow */ | |
487 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 488 | AARCH64_R_STR (MOVW_UABS_G2), /* name */ |
a06ea964 NC |
489 | FALSE, /* partial_inplace */ |
490 | 0xffff, /* src_mask */ | |
491 | 0xffff, /* dst_mask */ | |
492 | FALSE), /* pcrel_offset */ | |
493 | ||
494 | /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */ | |
a6bb11b2 | 495 | HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */ |
a06ea964 NC |
496 | 32, /* rightshift */ |
497 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
498 | 16, /* bitsize */ | |
499 | FALSE, /* pc_relative */ | |
500 | 0, /* bitpos */ | |
501 | complain_overflow_dont, /* complain_on_overflow */ | |
502 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 503 | AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */ |
a06ea964 NC |
504 | FALSE, /* partial_inplace */ |
505 | 0xffff, /* src_mask */ | |
506 | 0xffff, /* dst_mask */ | |
507 | FALSE), /* pcrel_offset */ | |
508 | ||
509 | /* MOVZ: ((S+A) >> 48) & 0xffff */ | |
a6bb11b2 | 510 | HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */ |
a06ea964 NC |
511 | 48, /* rightshift */ |
512 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
513 | 16, /* bitsize */ | |
514 | FALSE, /* pc_relative */ | |
515 | 0, /* bitpos */ | |
516 | complain_overflow_unsigned, /* complain_on_overflow */ | |
517 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 518 | AARCH64_R_STR (MOVW_UABS_G3), /* name */ |
a06ea964 NC |
519 | FALSE, /* partial_inplace */ |
520 | 0xffff, /* src_mask */ | |
521 | 0xffff, /* dst_mask */ | |
522 | FALSE), /* pcrel_offset */ | |
523 | ||
524 | /* Group relocations to create high part of a 16, 32, 48 or 64 bit | |
525 | signed data or abs address inline. Will change instruction | |
526 | to MOVN or MOVZ depending on sign of calculated value. */ | |
527 | ||
528 | /* MOV[ZN]: ((S+A) >> 0) & 0xffff */ | |
a6bb11b2 | 529 | HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */ |
a06ea964 NC |
530 | 0, /* rightshift */ |
531 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
532 | 16, /* bitsize */ | |
533 | FALSE, /* pc_relative */ | |
534 | 0, /* bitpos */ | |
535 | complain_overflow_signed, /* complain_on_overflow */ | |
536 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 537 | AARCH64_R_STR (MOVW_SABS_G0), /* name */ |
a06ea964 NC |
538 | FALSE, /* partial_inplace */ |
539 | 0xffff, /* src_mask */ | |
540 | 0xffff, /* dst_mask */ | |
541 | FALSE), /* pcrel_offset */ | |
542 | ||
543 | /* MOV[ZN]: ((S+A) >> 16) & 0xffff */ | |
a6bb11b2 | 544 | HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */ |
a06ea964 NC |
545 | 16, /* rightshift */ |
546 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
547 | 16, /* bitsize */ | |
548 | FALSE, /* pc_relative */ | |
549 | 0, /* bitpos */ | |
550 | complain_overflow_signed, /* complain_on_overflow */ | |
551 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 552 | AARCH64_R_STR (MOVW_SABS_G1), /* name */ |
a06ea964 NC |
553 | FALSE, /* partial_inplace */ |
554 | 0xffff, /* src_mask */ | |
555 | 0xffff, /* dst_mask */ | |
556 | FALSE), /* pcrel_offset */ | |
557 | ||
558 | /* MOV[ZN]: ((S+A) >> 32) & 0xffff */ | |
a6bb11b2 | 559 | HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */ |
a06ea964 NC |
560 | 32, /* rightshift */ |
561 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
562 | 16, /* bitsize */ | |
563 | FALSE, /* pc_relative */ | |
564 | 0, /* bitpos */ | |
565 | complain_overflow_signed, /* complain_on_overflow */ | |
566 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 567 | AARCH64_R_STR (MOVW_SABS_G2), /* name */ |
a06ea964 NC |
568 | FALSE, /* partial_inplace */ |
569 | 0xffff, /* src_mask */ | |
570 | 0xffff, /* dst_mask */ | |
571 | FALSE), /* pcrel_offset */ | |
572 | ||
573 | /* Relocations to generate 19, 21 and 33 bit PC-relative load/store | |
574 | addresses: PG(x) is (x & ~0xfff). */ | |
575 | ||
576 | /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */ | |
a6bb11b2 | 577 | HOWTO (AARCH64_R (LD_PREL_LO19), /* type */ |
a06ea964 NC |
578 | 2, /* rightshift */ |
579 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
580 | 19, /* bitsize */ | |
581 | TRUE, /* pc_relative */ | |
582 | 0, /* bitpos */ | |
583 | complain_overflow_signed, /* complain_on_overflow */ | |
584 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 585 | AARCH64_R_STR (LD_PREL_LO19), /* name */ |
a06ea964 NC |
586 | FALSE, /* partial_inplace */ |
587 | 0x7ffff, /* src_mask */ | |
588 | 0x7ffff, /* dst_mask */ | |
589 | TRUE), /* pcrel_offset */ | |
590 | ||
591 | /* ADR: (S+A-P) & 0x1fffff */ | |
a6bb11b2 | 592 | HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */ |
a06ea964 NC |
593 | 0, /* rightshift */ |
594 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
595 | 21, /* bitsize */ | |
596 | TRUE, /* pc_relative */ | |
597 | 0, /* bitpos */ | |
598 | complain_overflow_signed, /* complain_on_overflow */ | |
599 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 600 | AARCH64_R_STR (ADR_PREL_LO21), /* name */ |
a06ea964 NC |
601 | FALSE, /* partial_inplace */ |
602 | 0x1fffff, /* src_mask */ | |
603 | 0x1fffff, /* dst_mask */ | |
604 | TRUE), /* pcrel_offset */ | |
605 | ||
606 | /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ | |
a6bb11b2 | 607 | HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */ |
a06ea964 NC |
608 | 12, /* rightshift */ |
609 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
610 | 21, /* bitsize */ | |
611 | TRUE, /* pc_relative */ | |
612 | 0, /* bitpos */ | |
613 | complain_overflow_signed, /* complain_on_overflow */ | |
614 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 615 | AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */ |
a06ea964 NC |
616 | FALSE, /* partial_inplace */ |
617 | 0x1fffff, /* src_mask */ | |
618 | 0x1fffff, /* dst_mask */ | |
619 | TRUE), /* pcrel_offset */ | |
620 | ||
621 | /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */ | |
a6bb11b2 | 622 | HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */ |
a06ea964 NC |
623 | 12, /* rightshift */ |
624 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
625 | 21, /* bitsize */ | |
626 | TRUE, /* pc_relative */ | |
627 | 0, /* bitpos */ | |
628 | complain_overflow_dont, /* complain_on_overflow */ | |
629 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 630 | AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */ |
a06ea964 NC |
631 | FALSE, /* partial_inplace */ |
632 | 0x1fffff, /* src_mask */ | |
633 | 0x1fffff, /* dst_mask */ | |
634 | TRUE), /* pcrel_offset */ | |
635 | ||
636 | /* ADD: (S+A) & 0xfff [no overflow check] */ | |
a6bb11b2 | 637 | HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */ |
a06ea964 NC |
638 | 0, /* rightshift */ |
639 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
640 | 12, /* bitsize */ | |
641 | FALSE, /* pc_relative */ | |
642 | 10, /* bitpos */ | |
643 | complain_overflow_dont, /* complain_on_overflow */ | |
644 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 645 | AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */ |
a06ea964 NC |
646 | FALSE, /* partial_inplace */ |
647 | 0x3ffc00, /* src_mask */ | |
648 | 0x3ffc00, /* dst_mask */ | |
649 | FALSE), /* pcrel_offset */ | |
650 | ||
651 | /* LD/ST8: (S+A) & 0xfff */ | |
a6bb11b2 | 652 | HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */ |
a06ea964 NC |
653 | 0, /* rightshift */ |
654 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
655 | 12, /* bitsize */ | |
656 | FALSE, /* pc_relative */ | |
657 | 0, /* bitpos */ | |
658 | complain_overflow_dont, /* complain_on_overflow */ | |
659 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 660 | AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */ |
a06ea964 NC |
661 | FALSE, /* partial_inplace */ |
662 | 0xfff, /* src_mask */ | |
663 | 0xfff, /* dst_mask */ | |
664 | FALSE), /* pcrel_offset */ | |
665 | ||
666 | /* Relocations for control-flow instructions. */ | |
667 | ||
668 | /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */ | |
a6bb11b2 | 669 | HOWTO (AARCH64_R (TSTBR14), /* type */ |
a06ea964 NC |
670 | 2, /* rightshift */ |
671 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
672 | 14, /* bitsize */ | |
673 | TRUE, /* pc_relative */ | |
674 | 0, /* bitpos */ | |
675 | complain_overflow_signed, /* complain_on_overflow */ | |
676 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 677 | AARCH64_R_STR (TSTBR14), /* name */ |
a06ea964 NC |
678 | FALSE, /* partial_inplace */ |
679 | 0x3fff, /* src_mask */ | |
680 | 0x3fff, /* dst_mask */ | |
681 | TRUE), /* pcrel_offset */ | |
682 | ||
683 | /* B.cond: ((S+A-P) >> 2) & 0x7ffff */ | |
a6bb11b2 | 684 | HOWTO (AARCH64_R (CONDBR19), /* type */ |
a06ea964 NC |
685 | 2, /* rightshift */ |
686 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
687 | 19, /* bitsize */ | |
688 | TRUE, /* pc_relative */ | |
689 | 0, /* bitpos */ | |
690 | complain_overflow_signed, /* complain_on_overflow */ | |
691 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 692 | AARCH64_R_STR (CONDBR19), /* name */ |
a06ea964 NC |
693 | FALSE, /* partial_inplace */ |
694 | 0x7ffff, /* src_mask */ | |
695 | 0x7ffff, /* dst_mask */ | |
696 | TRUE), /* pcrel_offset */ | |
697 | ||
a06ea964 | 698 | /* B: ((S+A-P) >> 2) & 0x3ffffff */ |
a6bb11b2 | 699 | HOWTO (AARCH64_R (JUMP26), /* type */ |
a06ea964 NC |
700 | 2, /* rightshift */ |
701 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
702 | 26, /* bitsize */ | |
703 | TRUE, /* pc_relative */ | |
704 | 0, /* bitpos */ | |
705 | complain_overflow_signed, /* complain_on_overflow */ | |
706 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 707 | AARCH64_R_STR (JUMP26), /* name */ |
a06ea964 NC |
708 | FALSE, /* partial_inplace */ |
709 | 0x3ffffff, /* src_mask */ | |
710 | 0x3ffffff, /* dst_mask */ | |
711 | TRUE), /* pcrel_offset */ | |
712 | ||
713 | /* BL: ((S+A-P) >> 2) & 0x3ffffff */ | |
a6bb11b2 | 714 | HOWTO (AARCH64_R (CALL26), /* type */ |
a06ea964 NC |
715 | 2, /* rightshift */ |
716 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
717 | 26, /* bitsize */ | |
718 | TRUE, /* pc_relative */ | |
719 | 0, /* bitpos */ | |
720 | complain_overflow_signed, /* complain_on_overflow */ | |
721 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 722 | AARCH64_R_STR (CALL26), /* name */ |
a06ea964 NC |
723 | FALSE, /* partial_inplace */ |
724 | 0x3ffffff, /* src_mask */ | |
725 | 0x3ffffff, /* dst_mask */ | |
726 | TRUE), /* pcrel_offset */ | |
727 | ||
728 | /* LD/ST16: (S+A) & 0xffe */ | |
a6bb11b2 | 729 | HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */ |
a06ea964 NC |
730 | 1, /* rightshift */ |
731 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
732 | 12, /* bitsize */ | |
733 | FALSE, /* pc_relative */ | |
734 | 0, /* bitpos */ | |
735 | complain_overflow_dont, /* complain_on_overflow */ | |
736 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 737 | AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */ |
a06ea964 NC |
738 | FALSE, /* partial_inplace */ |
739 | 0xffe, /* src_mask */ | |
740 | 0xffe, /* dst_mask */ | |
741 | FALSE), /* pcrel_offset */ | |
742 | ||
743 | /* LD/ST32: (S+A) & 0xffc */ | |
a6bb11b2 | 744 | HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */ |
a06ea964 NC |
745 | 2, /* rightshift */ |
746 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
747 | 12, /* bitsize */ | |
748 | FALSE, /* pc_relative */ | |
749 | 0, /* bitpos */ | |
750 | complain_overflow_dont, /* complain_on_overflow */ | |
751 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 752 | AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */ |
a06ea964 NC |
753 | FALSE, /* partial_inplace */ |
754 | 0xffc, /* src_mask */ | |
755 | 0xffc, /* dst_mask */ | |
756 | FALSE), /* pcrel_offset */ | |
757 | ||
758 | /* LD/ST64: (S+A) & 0xff8 */ | |
a6bb11b2 | 759 | HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */ |
a06ea964 NC |
760 | 3, /* rightshift */ |
761 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
762 | 12, /* bitsize */ | |
763 | FALSE, /* pc_relative */ | |
764 | 0, /* bitpos */ | |
765 | complain_overflow_dont, /* complain_on_overflow */ | |
766 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 767 | AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */ |
a06ea964 NC |
768 | FALSE, /* partial_inplace */ |
769 | 0xff8, /* src_mask */ | |
770 | 0xff8, /* dst_mask */ | |
771 | FALSE), /* pcrel_offset */ | |
772 | ||
a06ea964 | 773 | /* LD/ST128: (S+A) & 0xff0 */ |
a6bb11b2 | 774 | HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */ |
a06ea964 NC |
775 | 4, /* rightshift */ |
776 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
777 | 12, /* bitsize */ | |
778 | FALSE, /* pc_relative */ | |
779 | 0, /* bitpos */ | |
780 | complain_overflow_dont, /* complain_on_overflow */ | |
781 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 782 | AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */ |
a06ea964 NC |
783 | FALSE, /* partial_inplace */ |
784 | 0xff0, /* src_mask */ | |
785 | 0xff0, /* dst_mask */ | |
786 | FALSE), /* pcrel_offset */ | |
787 | ||
f41aef5f RE |
788 | /* Set a load-literal immediate field to bits |
789 | 0x1FFFFC of G(S)-P */ | |
a6bb11b2 | 790 | HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */ |
f41aef5f RE |
791 | 2, /* rightshift */ |
792 | 2, /* size (0 = byte,1 = short,2 = long) */ | |
793 | 19, /* bitsize */ | |
794 | TRUE, /* pc_relative */ | |
795 | 0, /* bitpos */ | |
796 | complain_overflow_signed, /* complain_on_overflow */ | |
797 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 798 | AARCH64_R_STR (GOT_LD_PREL19), /* name */ |
f41aef5f RE |
799 | FALSE, /* partial_inplace */ |
800 | 0xffffe0, /* src_mask */ | |
801 | 0xffffe0, /* dst_mask */ | |
802 | TRUE), /* pcrel_offset */ | |
803 | ||
a06ea964 NC |
804 | /* Get to the page for the GOT entry for the symbol |
805 | (G(S) - P) using an ADRP instruction. */ | |
a6bb11b2 | 806 | HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */ |
a06ea964 NC |
807 | 12, /* rightshift */ |
808 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
809 | 21, /* bitsize */ | |
810 | TRUE, /* pc_relative */ | |
811 | 0, /* bitpos */ | |
812 | complain_overflow_dont, /* complain_on_overflow */ | |
813 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 814 | AARCH64_R_STR (ADR_GOT_PAGE), /* name */ |
a06ea964 NC |
815 | FALSE, /* partial_inplace */ |
816 | 0x1fffff, /* src_mask */ | |
817 | 0x1fffff, /* dst_mask */ | |
818 | TRUE), /* pcrel_offset */ | |
819 | ||
a6bb11b2 YZ |
820 | /* LD64: GOT offset G(S) & 0xff8 */ |
821 | HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */ | |
a06ea964 NC |
822 | 3, /* rightshift */ |
823 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
824 | 12, /* bitsize */ | |
825 | FALSE, /* pc_relative */ | |
826 | 0, /* bitpos */ | |
827 | complain_overflow_dont, /* complain_on_overflow */ | |
828 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 829 | AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */ |
a06ea964 NC |
830 | FALSE, /* partial_inplace */ |
831 | 0xff8, /* src_mask */ | |
832 | 0xff8, /* dst_mask */ | |
a6bb11b2 | 833 | FALSE), /* pcrel_offset */ |
a06ea964 | 834 | |
a6bb11b2 YZ |
835 | /* LD32: GOT offset G(S) & 0xffc */ |
836 | HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */ | |
837 | 2, /* rightshift */ | |
838 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
839 | 12, /* bitsize */ | |
840 | FALSE, /* pc_relative */ | |
841 | 0, /* bitpos */ | |
842 | complain_overflow_dont, /* complain_on_overflow */ | |
843 | bfd_elf_generic_reloc, /* special_function */ | |
844 | AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */ | |
845 | FALSE, /* partial_inplace */ | |
846 | 0xffc, /* src_mask */ | |
847 | 0xffc, /* dst_mask */ | |
848 | FALSE), /* pcrel_offset */ | |
a06ea964 NC |
849 | |
850 | /* Get to the page for the GOT entry for the symbol | |
851 | (G(S) - P) using an ADRP instruction. */ | |
a6bb11b2 | 852 | HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */ |
a06ea964 NC |
853 | 12, /* rightshift */ |
854 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
855 | 21, /* bitsize */ | |
856 | TRUE, /* pc_relative */ | |
857 | 0, /* bitpos */ | |
858 | complain_overflow_dont, /* complain_on_overflow */ | |
859 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 860 | AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */ |
a06ea964 NC |
861 | FALSE, /* partial_inplace */ |
862 | 0x1fffff, /* src_mask */ | |
863 | 0x1fffff, /* dst_mask */ | |
864 | TRUE), /* pcrel_offset */ | |
865 | ||
866 | /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */ | |
a6bb11b2 | 867 | HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */ |
a06ea964 NC |
868 | 0, /* rightshift */ |
869 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
870 | 12, /* bitsize */ | |
871 | FALSE, /* pc_relative */ | |
872 | 0, /* bitpos */ | |
873 | complain_overflow_dont, /* complain_on_overflow */ | |
874 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 875 | AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */ |
a06ea964 NC |
876 | FALSE, /* partial_inplace */ |
877 | 0xfff, /* src_mask */ | |
878 | 0xfff, /* dst_mask */ | |
879 | FALSE), /* pcrel_offset */ | |
880 | ||
a6bb11b2 | 881 | HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */ |
a06ea964 NC |
882 | 16, /* rightshift */ |
883 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
884 | 16, /* bitsize */ | |
885 | FALSE, /* pc_relative */ | |
886 | 0, /* bitpos */ | |
887 | complain_overflow_dont, /* complain_on_overflow */ | |
888 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 889 | AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */ |
a06ea964 NC |
890 | FALSE, /* partial_inplace */ |
891 | 0xffff, /* src_mask */ | |
892 | 0xffff, /* dst_mask */ | |
893 | FALSE), /* pcrel_offset */ | |
894 | ||
a6bb11b2 | 895 | HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */ |
a06ea964 NC |
896 | 0, /* rightshift */ |
897 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
898 | 32, /* bitsize */ | |
899 | FALSE, /* pc_relative */ | |
900 | 0, /* bitpos */ | |
901 | complain_overflow_dont, /* complain_on_overflow */ | |
902 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 903 | AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */ |
a06ea964 NC |
904 | FALSE, /* partial_inplace */ |
905 | 0xffff, /* src_mask */ | |
906 | 0xffff, /* dst_mask */ | |
907 | FALSE), /* pcrel_offset */ | |
908 | ||
a6bb11b2 | 909 | HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */ |
a06ea964 NC |
910 | 12, /* rightshift */ |
911 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
912 | 21, /* bitsize */ | |
913 | FALSE, /* pc_relative */ | |
914 | 0, /* bitpos */ | |
915 | complain_overflow_dont, /* complain_on_overflow */ | |
916 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 917 | AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */ |
a06ea964 NC |
918 | FALSE, /* partial_inplace */ |
919 | 0x1fffff, /* src_mask */ | |
920 | 0x1fffff, /* dst_mask */ | |
921 | FALSE), /* pcrel_offset */ | |
922 | ||
a6bb11b2 | 923 | HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */ |
a06ea964 NC |
924 | 3, /* rightshift */ |
925 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
926 | 12, /* bitsize */ | |
927 | FALSE, /* pc_relative */ | |
928 | 0, /* bitpos */ | |
929 | complain_overflow_dont, /* complain_on_overflow */ | |
930 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 931 | AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */ |
a06ea964 NC |
932 | FALSE, /* partial_inplace */ |
933 | 0xff8, /* src_mask */ | |
934 | 0xff8, /* dst_mask */ | |
935 | FALSE), /* pcrel_offset */ | |
936 | ||
a6bb11b2 YZ |
937 | HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */ |
938 | 2, /* rightshift */ | |
939 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
940 | 12, /* bitsize */ | |
941 | FALSE, /* pc_relative */ | |
942 | 0, /* bitpos */ | |
943 | complain_overflow_dont, /* complain_on_overflow */ | |
944 | bfd_elf_generic_reloc, /* special_function */ | |
945 | AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */ | |
946 | FALSE, /* partial_inplace */ | |
947 | 0xffc, /* src_mask */ | |
948 | 0xffc, /* dst_mask */ | |
949 | FALSE), /* pcrel_offset */ | |
950 | ||
951 | HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */ | |
bb3f9ed8 | 952 | 2, /* rightshift */ |
a06ea964 NC |
953 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
954 | 21, /* bitsize */ | |
955 | FALSE, /* pc_relative */ | |
956 | 0, /* bitpos */ | |
957 | complain_overflow_dont, /* complain_on_overflow */ | |
958 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 959 | AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */ |
a06ea964 NC |
960 | FALSE, /* partial_inplace */ |
961 | 0x1ffffc, /* src_mask */ | |
962 | 0x1ffffc, /* dst_mask */ | |
963 | FALSE), /* pcrel_offset */ | |
964 | ||
a6bb11b2 | 965 | HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */ |
bb3f9ed8 | 966 | 32, /* rightshift */ |
a06ea964 NC |
967 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
968 | 12, /* bitsize */ | |
969 | FALSE, /* pc_relative */ | |
970 | 0, /* bitpos */ | |
971 | complain_overflow_dont, /* complain_on_overflow */ | |
972 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 973 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */ |
a06ea964 NC |
974 | FALSE, /* partial_inplace */ |
975 | 0xffff, /* src_mask */ | |
976 | 0xffff, /* dst_mask */ | |
977 | FALSE), /* pcrel_offset */ | |
978 | ||
a6bb11b2 | 979 | HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */ |
bb3f9ed8 | 980 | 16, /* rightshift */ |
a06ea964 NC |
981 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
982 | 12, /* bitsize */ | |
983 | FALSE, /* pc_relative */ | |
984 | 0, /* bitpos */ | |
985 | complain_overflow_dont, /* complain_on_overflow */ | |
986 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 987 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */ |
a06ea964 NC |
988 | FALSE, /* partial_inplace */ |
989 | 0xffff, /* src_mask */ | |
990 | 0xffff, /* dst_mask */ | |
991 | FALSE), /* pcrel_offset */ | |
992 | ||
a6bb11b2 | 993 | HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */ |
bb3f9ed8 | 994 | 16, /* rightshift */ |
a06ea964 NC |
995 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
996 | 12, /* bitsize */ | |
997 | FALSE, /* pc_relative */ | |
998 | 0, /* bitpos */ | |
999 | complain_overflow_dont, /* complain_on_overflow */ | |
1000 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1001 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */ |
a06ea964 NC |
1002 | FALSE, /* partial_inplace */ |
1003 | 0xffff, /* src_mask */ | |
1004 | 0xffff, /* dst_mask */ | |
1005 | FALSE), /* pcrel_offset */ | |
1006 | ||
a6bb11b2 | 1007 | HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */ |
a06ea964 NC |
1008 | 0, /* rightshift */ |
1009 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1010 | 12, /* bitsize */ | |
1011 | FALSE, /* pc_relative */ | |
1012 | 0, /* bitpos */ | |
1013 | complain_overflow_dont, /* complain_on_overflow */ | |
1014 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1015 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */ |
a06ea964 NC |
1016 | FALSE, /* partial_inplace */ |
1017 | 0xffff, /* src_mask */ | |
1018 | 0xffff, /* dst_mask */ | |
1019 | FALSE), /* pcrel_offset */ | |
1020 | ||
a6bb11b2 | 1021 | HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */ |
a06ea964 NC |
1022 | 0, /* rightshift */ |
1023 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1024 | 12, /* bitsize */ | |
1025 | FALSE, /* pc_relative */ | |
1026 | 0, /* bitpos */ | |
1027 | complain_overflow_dont, /* complain_on_overflow */ | |
1028 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1029 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */ |
a06ea964 NC |
1030 | FALSE, /* partial_inplace */ |
1031 | 0xffff, /* src_mask */ | |
1032 | 0xffff, /* dst_mask */ | |
1033 | FALSE), /* pcrel_offset */ | |
1034 | ||
a6bb11b2 | 1035 | HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */ |
bb3f9ed8 | 1036 | 12, /* rightshift */ |
a06ea964 NC |
1037 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
1038 | 12, /* bitsize */ | |
1039 | FALSE, /* pc_relative */ | |
1040 | 0, /* bitpos */ | |
1041 | complain_overflow_dont, /* complain_on_overflow */ | |
1042 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1043 | AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */ |
a06ea964 NC |
1044 | FALSE, /* partial_inplace */ |
1045 | 0xfff, /* src_mask */ | |
1046 | 0xfff, /* dst_mask */ | |
1047 | FALSE), /* pcrel_offset */ | |
1048 | ||
a6bb11b2 | 1049 | HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */ |
a06ea964 NC |
1050 | 0, /* rightshift */ |
1051 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1052 | 12, /* bitsize */ | |
1053 | FALSE, /* pc_relative */ | |
1054 | 0, /* bitpos */ | |
1055 | complain_overflow_dont, /* complain_on_overflow */ | |
1056 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1057 | AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */ |
a06ea964 NC |
1058 | FALSE, /* partial_inplace */ |
1059 | 0xfff, /* src_mask */ | |
1060 | 0xfff, /* dst_mask */ | |
1061 | FALSE), /* pcrel_offset */ | |
1062 | ||
a6bb11b2 | 1063 | HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */ |
a06ea964 NC |
1064 | 0, /* rightshift */ |
1065 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1066 | 12, /* bitsize */ | |
1067 | FALSE, /* pc_relative */ | |
1068 | 0, /* bitpos */ | |
1069 | complain_overflow_dont, /* complain_on_overflow */ | |
1070 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1071 | AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */ |
a06ea964 NC |
1072 | FALSE, /* partial_inplace */ |
1073 | 0xfff, /* src_mask */ | |
1074 | 0xfff, /* dst_mask */ | |
1075 | FALSE), /* pcrel_offset */ | |
a06ea964 | 1076 | |
a6bb11b2 | 1077 | HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */ |
bb3f9ed8 | 1078 | 2, /* rightshift */ |
a06ea964 NC |
1079 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
1080 | 21, /* bitsize */ | |
1081 | TRUE, /* pc_relative */ | |
1082 | 0, /* bitpos */ | |
1083 | complain_overflow_dont, /* complain_on_overflow */ | |
1084 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1085 | AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */ |
a06ea964 NC |
1086 | FALSE, /* partial_inplace */ |
1087 | 0x1ffffc, /* src_mask */ | |
1088 | 0x1ffffc, /* dst_mask */ | |
1089 | TRUE), /* pcrel_offset */ | |
1090 | ||
a6bb11b2 | 1091 | HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */ |
a06ea964 NC |
1092 | 0, /* rightshift */ |
1093 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1094 | 21, /* bitsize */ | |
1095 | TRUE, /* pc_relative */ | |
1096 | 0, /* bitpos */ | |
1097 | complain_overflow_dont, /* complain_on_overflow */ | |
1098 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1099 | AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */ |
a06ea964 NC |
1100 | FALSE, /* partial_inplace */ |
1101 | 0x1fffff, /* src_mask */ | |
1102 | 0x1fffff, /* dst_mask */ | |
1103 | TRUE), /* pcrel_offset */ | |
1104 | ||
1105 | /* Get to the page for the GOT entry for the symbol | |
1106 | (G(S) - P) using an ADRP instruction. */ | |
a6bb11b2 | 1107 | HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */ |
a06ea964 NC |
1108 | 12, /* rightshift */ |
1109 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1110 | 21, /* bitsize */ | |
1111 | TRUE, /* pc_relative */ | |
1112 | 0, /* bitpos */ | |
1113 | complain_overflow_dont, /* complain_on_overflow */ | |
1114 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1115 | AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */ |
a06ea964 NC |
1116 | FALSE, /* partial_inplace */ |
1117 | 0x1fffff, /* src_mask */ | |
1118 | 0x1fffff, /* dst_mask */ | |
1119 | TRUE), /* pcrel_offset */ | |
1120 | ||
a6bb11b2 YZ |
1121 | /* LD64: GOT offset G(S) & 0xff8. */ |
1122 | HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12_NC), /* type */ | |
a06ea964 NC |
1123 | 3, /* rightshift */ |
1124 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1125 | 12, /* bitsize */ | |
1126 | FALSE, /* pc_relative */ | |
1127 | 0, /* bitpos */ | |
1128 | complain_overflow_dont, /* complain_on_overflow */ | |
1129 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1130 | AARCH64_R_STR (TLSDESC_LD64_LO12_NC), /* name */ |
a06ea964 | 1131 | FALSE, /* partial_inplace */ |
a6bb11b2 YZ |
1132 | 0xff8, /* src_mask */ |
1133 | 0xff8, /* dst_mask */ | |
1134 | FALSE), /* pcrel_offset */ | |
1135 | ||
1136 | /* LD32: GOT offset G(S) & 0xffc. */ | |
1137 | HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */ | |
1138 | 2, /* rightshift */ | |
1139 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1140 | 12, /* bitsize */ | |
1141 | FALSE, /* pc_relative */ | |
1142 | 0, /* bitpos */ | |
1143 | complain_overflow_dont, /* complain_on_overflow */ | |
1144 | bfd_elf_generic_reloc, /* special_function */ | |
1145 | AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */ | |
1146 | FALSE, /* partial_inplace */ | |
1147 | 0xffc, /* src_mask */ | |
1148 | 0xffc, /* dst_mask */ | |
a06ea964 NC |
1149 | FALSE), /* pcrel_offset */ |
1150 | ||
1151 | /* ADD: GOT offset G(S) & 0xfff. */ | |
a6bb11b2 | 1152 | HOWTO (AARCH64_R (TLSDESC_ADD_LO12_NC), /* type */ |
a06ea964 NC |
1153 | 0, /* rightshift */ |
1154 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1155 | 12, /* bitsize */ | |
1156 | FALSE, /* pc_relative */ | |
1157 | 0, /* bitpos */ | |
1158 | complain_overflow_dont, /* complain_on_overflow */ | |
1159 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1160 | AARCH64_R_STR (TLSDESC_ADD_LO12_NC), /* name */ |
a06ea964 NC |
1161 | FALSE, /* partial_inplace */ |
1162 | 0xfff, /* src_mask */ | |
1163 | 0xfff, /* dst_mask */ | |
1164 | FALSE), /* pcrel_offset */ | |
1165 | ||
a6bb11b2 | 1166 | HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */ |
bb3f9ed8 | 1167 | 16, /* rightshift */ |
a06ea964 NC |
1168 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
1169 | 12, /* bitsize */ | |
1170 | FALSE, /* pc_relative */ | |
1171 | 0, /* bitpos */ | |
1172 | complain_overflow_dont, /* complain_on_overflow */ | |
1173 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1174 | AARCH64_R_STR (TLSDESC_OFF_G1), /* name */ |
a06ea964 NC |
1175 | FALSE, /* partial_inplace */ |
1176 | 0xffff, /* src_mask */ | |
1177 | 0xffff, /* dst_mask */ | |
1178 | FALSE), /* pcrel_offset */ | |
1179 | ||
a6bb11b2 | 1180 | HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */ |
a06ea964 NC |
1181 | 0, /* rightshift */ |
1182 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1183 | 12, /* bitsize */ | |
1184 | FALSE, /* pc_relative */ | |
1185 | 0, /* bitpos */ | |
1186 | complain_overflow_dont, /* complain_on_overflow */ | |
1187 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1188 | AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */ |
a06ea964 NC |
1189 | FALSE, /* partial_inplace */ |
1190 | 0xffff, /* src_mask */ | |
1191 | 0xffff, /* dst_mask */ | |
1192 | FALSE), /* pcrel_offset */ | |
1193 | ||
a6bb11b2 | 1194 | HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */ |
a06ea964 NC |
1195 | 0, /* rightshift */ |
1196 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1197 | 12, /* bitsize */ | |
1198 | FALSE, /* pc_relative */ | |
1199 | 0, /* bitpos */ | |
1200 | complain_overflow_dont, /* complain_on_overflow */ | |
1201 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1202 | AARCH64_R_STR (TLSDESC_LDR), /* name */ |
a06ea964 NC |
1203 | FALSE, /* partial_inplace */ |
1204 | 0x0, /* src_mask */ | |
1205 | 0x0, /* dst_mask */ | |
1206 | FALSE), /* pcrel_offset */ | |
1207 | ||
a6bb11b2 | 1208 | HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */ |
a06ea964 NC |
1209 | 0, /* rightshift */ |
1210 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1211 | 12, /* bitsize */ | |
1212 | FALSE, /* pc_relative */ | |
1213 | 0, /* bitpos */ | |
1214 | complain_overflow_dont, /* complain_on_overflow */ | |
1215 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1216 | AARCH64_R_STR (TLSDESC_ADD), /* name */ |
a06ea964 NC |
1217 | FALSE, /* partial_inplace */ |
1218 | 0x0, /* src_mask */ | |
1219 | 0x0, /* dst_mask */ | |
1220 | FALSE), /* pcrel_offset */ | |
1221 | ||
a6bb11b2 | 1222 | HOWTO (AARCH64_R (TLSDESC_CALL), /* type */ |
a06ea964 NC |
1223 | 0, /* rightshift */ |
1224 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1225 | 12, /* bitsize */ | |
1226 | FALSE, /* pc_relative */ | |
1227 | 0, /* bitpos */ | |
1228 | complain_overflow_dont, /* complain_on_overflow */ | |
1229 | bfd_elf_generic_reloc, /* special_function */ | |
a6bb11b2 | 1230 | AARCH64_R_STR (TLSDESC_CALL), /* name */ |
a06ea964 NC |
1231 | FALSE, /* partial_inplace */ |
1232 | 0x0, /* src_mask */ | |
1233 | 0x0, /* dst_mask */ | |
1234 | FALSE), /* pcrel_offset */ | |
a6bb11b2 YZ |
1235 | |
1236 | HOWTO (AARCH64_R (COPY), /* type */ | |
1237 | 0, /* rightshift */ | |
1238 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1239 | 64, /* bitsize */ | |
1240 | FALSE, /* pc_relative */ | |
1241 | 0, /* bitpos */ | |
1242 | complain_overflow_bitfield, /* complain_on_overflow */ | |
1243 | bfd_elf_generic_reloc, /* special_function */ | |
1244 | AARCH64_R_STR (COPY), /* name */ | |
1245 | TRUE, /* partial_inplace */ | |
1246 | 0xffffffff, /* src_mask */ | |
1247 | 0xffffffff, /* dst_mask */ | |
1248 | FALSE), /* pcrel_offset */ | |
1249 | ||
1250 | HOWTO (AARCH64_R (GLOB_DAT), /* type */ | |
1251 | 0, /* rightshift */ | |
1252 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1253 | 64, /* bitsize */ | |
1254 | FALSE, /* pc_relative */ | |
1255 | 0, /* bitpos */ | |
1256 | complain_overflow_bitfield, /* complain_on_overflow */ | |
1257 | bfd_elf_generic_reloc, /* special_function */ | |
1258 | AARCH64_R_STR (GLOB_DAT), /* name */ | |
1259 | TRUE, /* partial_inplace */ | |
1260 | 0xffffffff, /* src_mask */ | |
1261 | 0xffffffff, /* dst_mask */ | |
1262 | FALSE), /* pcrel_offset */ | |
1263 | ||
1264 | HOWTO (AARCH64_R (JUMP_SLOT), /* type */ | |
1265 | 0, /* rightshift */ | |
1266 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1267 | 64, /* bitsize */ | |
1268 | FALSE, /* pc_relative */ | |
1269 | 0, /* bitpos */ | |
1270 | complain_overflow_bitfield, /* complain_on_overflow */ | |
1271 | bfd_elf_generic_reloc, /* special_function */ | |
1272 | AARCH64_R_STR (JUMP_SLOT), /* name */ | |
1273 | TRUE, /* partial_inplace */ | |
1274 | 0xffffffff, /* src_mask */ | |
1275 | 0xffffffff, /* dst_mask */ | |
1276 | FALSE), /* pcrel_offset */ | |
1277 | ||
1278 | HOWTO (AARCH64_R (RELATIVE), /* type */ | |
1279 | 0, /* rightshift */ | |
1280 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1281 | 64, /* bitsize */ | |
1282 | FALSE, /* pc_relative */ | |
1283 | 0, /* bitpos */ | |
1284 | complain_overflow_bitfield, /* complain_on_overflow */ | |
1285 | bfd_elf_generic_reloc, /* special_function */ | |
1286 | AARCH64_R_STR (RELATIVE), /* name */ | |
1287 | TRUE, /* partial_inplace */ | |
1288 | ALL_ONES, /* src_mask */ | |
1289 | ALL_ONES, /* dst_mask */ | |
1290 | FALSE), /* pcrel_offset */ | |
1291 | ||
1292 | HOWTO (AARCH64_R (TLS_DTPMOD), /* type */ | |
1293 | 0, /* rightshift */ | |
1294 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1295 | 64, /* bitsize */ | |
1296 | FALSE, /* pc_relative */ | |
1297 | 0, /* bitpos */ | |
1298 | complain_overflow_dont, /* complain_on_overflow */ | |
1299 | bfd_elf_generic_reloc, /* special_function */ | |
da0781dc YZ |
1300 | #if ARCH_SIZE == 64 |
1301 | AARCH64_R_STR (TLS_DTPMOD64), /* name */ | |
1302 | #else | |
a6bb11b2 | 1303 | AARCH64_R_STR (TLS_DTPMOD), /* name */ |
da0781dc | 1304 | #endif |
a6bb11b2 YZ |
1305 | FALSE, /* partial_inplace */ |
1306 | 0, /* src_mask */ | |
1307 | ALL_ONES, /* dst_mask */ | |
1308 | FALSE), /* pc_reloffset */ | |
1309 | ||
1310 | HOWTO (AARCH64_R (TLS_DTPREL), /* type */ | |
1311 | 0, /* rightshift */ | |
1312 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1313 | 64, /* bitsize */ | |
1314 | FALSE, /* pc_relative */ | |
1315 | 0, /* bitpos */ | |
1316 | complain_overflow_dont, /* complain_on_overflow */ | |
1317 | bfd_elf_generic_reloc, /* special_function */ | |
da0781dc YZ |
1318 | #if ARCH_SIZE == 64 |
1319 | AARCH64_R_STR (TLS_DTPREL64), /* name */ | |
1320 | #else | |
a6bb11b2 | 1321 | AARCH64_R_STR (TLS_DTPREL), /* name */ |
da0781dc | 1322 | #endif |
a6bb11b2 YZ |
1323 | FALSE, /* partial_inplace */ |
1324 | 0, /* src_mask */ | |
1325 | ALL_ONES, /* dst_mask */ | |
1326 | FALSE), /* pcrel_offset */ | |
1327 | ||
1328 | HOWTO (AARCH64_R (TLS_TPREL), /* type */ | |
1329 | 0, /* rightshift */ | |
1330 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1331 | 64, /* bitsize */ | |
1332 | FALSE, /* pc_relative */ | |
1333 | 0, /* bitpos */ | |
1334 | complain_overflow_dont, /* complain_on_overflow */ | |
1335 | bfd_elf_generic_reloc, /* special_function */ | |
da0781dc YZ |
1336 | #if ARCH_SIZE == 64 |
1337 | AARCH64_R_STR (TLS_TPREL64), /* name */ | |
1338 | #else | |
a6bb11b2 | 1339 | AARCH64_R_STR (TLS_TPREL), /* name */ |
da0781dc | 1340 | #endif |
a6bb11b2 YZ |
1341 | FALSE, /* partial_inplace */ |
1342 | 0, /* src_mask */ | |
1343 | ALL_ONES, /* dst_mask */ | |
1344 | FALSE), /* pcrel_offset */ | |
1345 | ||
1346 | HOWTO (AARCH64_R (TLSDESC), /* type */ | |
1347 | 0, /* rightshift */ | |
1348 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1349 | 64, /* bitsize */ | |
1350 | FALSE, /* pc_relative */ | |
1351 | 0, /* bitpos */ | |
1352 | complain_overflow_dont, /* complain_on_overflow */ | |
1353 | bfd_elf_generic_reloc, /* special_function */ | |
1354 | AARCH64_R_STR (TLSDESC), /* name */ | |
1355 | FALSE, /* partial_inplace */ | |
1356 | 0, /* src_mask */ | |
1357 | ALL_ONES, /* dst_mask */ | |
1358 | FALSE), /* pcrel_offset */ | |
1359 | ||
1360 | HOWTO (AARCH64_R (IRELATIVE), /* type */ | |
1361 | 0, /* rightshift */ | |
1362 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1363 | 64, /* bitsize */ | |
1364 | FALSE, /* pc_relative */ | |
1365 | 0, /* bitpos */ | |
1366 | complain_overflow_bitfield, /* complain_on_overflow */ | |
1367 | bfd_elf_generic_reloc, /* special_function */ | |
1368 | AARCH64_R_STR (IRELATIVE), /* name */ | |
1369 | FALSE, /* partial_inplace */ | |
1370 | 0, /* src_mask */ | |
1371 | ALL_ONES, /* dst_mask */ | |
1372 | FALSE), /* pcrel_offset */ | |
1373 | ||
1374 | EMPTY_HOWTO (0), | |
a06ea964 NC |
1375 | }; |
1376 | ||
a6bb11b2 YZ |
1377 | static reloc_howto_type elfNN_aarch64_howto_none = |
1378 | HOWTO (R_AARCH64_NONE, /* type */ | |
1379 | 0, /* rightshift */ | |
1380 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
1381 | 0, /* bitsize */ | |
1382 | FALSE, /* pc_relative */ | |
1383 | 0, /* bitpos */ | |
1384 | complain_overflow_dont,/* complain_on_overflow */ | |
1385 | bfd_elf_generic_reloc, /* special_function */ | |
1386 | "R_AARCH64_NONE", /* name */ | |
1387 | FALSE, /* partial_inplace */ | |
1388 | 0, /* src_mask */ | |
1389 | 0, /* dst_mask */ | |
1390 | FALSE); /* pcrel_offset */ | |
1391 | ||
1392 | /* Given HOWTO, return the bfd internal relocation enumerator. */ | |
1393 | ||
1394 | static bfd_reloc_code_real_type | |
1395 | elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto) | |
1396 | { | |
1397 | const int size | |
1398 | = (int) ARRAY_SIZE (elfNN_aarch64_howto_table); | |
1399 | const ptrdiff_t offset | |
1400 | = howto - elfNN_aarch64_howto_table; | |
1401 | ||
1402 | if (offset > 0 && offset < size - 1) | |
1403 | return BFD_RELOC_AARCH64_RELOC_START + offset; | |
1404 | ||
1405 | if (howto == &elfNN_aarch64_howto_none) | |
1406 | return BFD_RELOC_AARCH64_NONE; | |
1407 | ||
1408 | return BFD_RELOC_AARCH64_RELOC_START; | |
1409 | } | |
1410 | ||
1411 | /* Given R_TYPE, return the bfd internal relocation enumerator. */ | |
1412 | ||
1413 | static bfd_reloc_code_real_type | |
1414 | elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type) | |
1415 | { | |
1416 | static bfd_boolean initialized_p = FALSE; | |
1417 | /* Indexed by R_TYPE, values are offsets in the howto_table. */ | |
1418 | static unsigned int offsets[R_AARCH64_end]; | |
1419 | ||
1420 | if (initialized_p == FALSE) | |
1421 | { | |
1422 | unsigned int i; | |
1423 | ||
1424 | for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i) | |
1425 | if (elfNN_aarch64_howto_table[i].type != 0) | |
1426 | offsets[elfNN_aarch64_howto_table[i].type] = i; | |
1427 | ||
1428 | initialized_p = TRUE; | |
1429 | } | |
1430 | ||
1431 | if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL) | |
1432 | return BFD_RELOC_AARCH64_NONE; | |
1433 | ||
1434 | return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type]; | |
1435 | } | |
1436 | ||
1437 | struct elf_aarch64_reloc_map | |
1438 | { | |
1439 | bfd_reloc_code_real_type from; | |
1440 | bfd_reloc_code_real_type to; | |
1441 | }; | |
1442 | ||
1443 | /* Map bfd generic reloc to AArch64-specific reloc. */ | |
1444 | static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] = | |
1445 | { | |
1446 | {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE}, | |
1447 | ||
1448 | /* Basic data relocations. */ | |
1449 | {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN}, | |
1450 | {BFD_RELOC_64, BFD_RELOC_AARCH64_64}, | |
1451 | {BFD_RELOC_32, BFD_RELOC_AARCH64_32}, | |
1452 | {BFD_RELOC_16, BFD_RELOC_AARCH64_16}, | |
1453 | {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL}, | |
1454 | {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL}, | |
1455 | {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL}, | |
1456 | }; | |
1457 | ||
1458 | /* Given the bfd internal relocation enumerator in CODE, return the | |
1459 | corresponding howto entry. */ | |
1460 | ||
1461 | static reloc_howto_type * | |
1462 | elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code) | |
1463 | { | |
1464 | unsigned int i; | |
1465 | ||
1466 | /* Convert bfd generic reloc to AArch64-specific reloc. */ | |
1467 | if (code < BFD_RELOC_AARCH64_RELOC_START | |
1468 | || code > BFD_RELOC_AARCH64_RELOC_END) | |
1469 | for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++) | |
1470 | if (elf_aarch64_reloc_map[i].from == code) | |
1471 | { | |
1472 | code = elf_aarch64_reloc_map[i].to; | |
1473 | break; | |
1474 | } | |
1475 | ||
1476 | if (code > BFD_RELOC_AARCH64_RELOC_START | |
1477 | && code < BFD_RELOC_AARCH64_RELOC_END) | |
1478 | if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type) | |
1479 | return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START]; | |
1480 | ||
54757ed1 AP |
1481 | if (code == BFD_RELOC_AARCH64_NONE) |
1482 | return &elfNN_aarch64_howto_none; | |
1483 | ||
a6bb11b2 YZ |
1484 | return NULL; |
1485 | } | |
1486 | ||
a06ea964 | 1487 | static reloc_howto_type * |
cec5225b | 1488 | elfNN_aarch64_howto_from_type (unsigned int r_type) |
a06ea964 | 1489 | { |
a6bb11b2 YZ |
1490 | bfd_reloc_code_real_type val; |
1491 | reloc_howto_type *howto; | |
1492 | ||
cec5225b YZ |
1493 | #if ARCH_SIZE == 32 |
1494 | if (r_type > 256) | |
1495 | { | |
1496 | bfd_set_error (bfd_error_bad_value); | |
1497 | return NULL; | |
1498 | } | |
1499 | #endif | |
1500 | ||
a6bb11b2 YZ |
1501 | if (r_type == R_AARCH64_NONE) |
1502 | return &elfNN_aarch64_howto_none; | |
a06ea964 | 1503 | |
a6bb11b2 YZ |
1504 | val = elfNN_aarch64_bfd_reloc_from_type (r_type); |
1505 | howto = elfNN_aarch64_howto_from_bfd_reloc (val); | |
a06ea964 | 1506 | |
a6bb11b2 YZ |
1507 | if (howto != NULL) |
1508 | return howto; | |
a06ea964 | 1509 | |
a06ea964 NC |
1510 | bfd_set_error (bfd_error_bad_value); |
1511 | return NULL; | |
1512 | } | |
1513 | ||
1514 | static void | |
cec5225b | 1515 | elfNN_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, |
a06ea964 NC |
1516 | Elf_Internal_Rela *elf_reloc) |
1517 | { | |
1518 | unsigned int r_type; | |
1519 | ||
cec5225b YZ |
1520 | r_type = ELFNN_R_TYPE (elf_reloc->r_info); |
1521 | bfd_reloc->howto = elfNN_aarch64_howto_from_type (r_type); | |
a06ea964 NC |
1522 | } |
1523 | ||
a06ea964 | 1524 | static reloc_howto_type * |
cec5225b | 1525 | elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
a06ea964 NC |
1526 | bfd_reloc_code_real_type code) |
1527 | { | |
a6bb11b2 | 1528 | reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code); |
a06ea964 | 1529 | |
a6bb11b2 YZ |
1530 | if (howto != NULL) |
1531 | return howto; | |
a06ea964 NC |
1532 | |
1533 | bfd_set_error (bfd_error_bad_value); | |
1534 | return NULL; | |
1535 | } | |
1536 | ||
1537 | static reloc_howto_type * | |
cec5225b | 1538 | elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
a06ea964 NC |
1539 | const char *r_name) |
1540 | { | |
1541 | unsigned int i; | |
1542 | ||
a6bb11b2 YZ |
1543 | for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i) |
1544 | if (elfNN_aarch64_howto_table[i].name != NULL | |
1545 | && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0) | |
1546 | return &elfNN_aarch64_howto_table[i]; | |
a06ea964 NC |
1547 | |
1548 | return NULL; | |
1549 | } | |
1550 | ||
cec5225b YZ |
1551 | #define TARGET_LITTLE_SYM bfd_elfNN_littleaarch64_vec |
1552 | #define TARGET_LITTLE_NAME "elfNN-littleaarch64" | |
1553 | #define TARGET_BIG_SYM bfd_elfNN_bigaarch64_vec | |
1554 | #define TARGET_BIG_NAME "elfNN-bigaarch64" | |
a06ea964 | 1555 | |
a06ea964 NC |
1556 | /* The linker script knows the section names for placement. |
1557 | The entry_names are used to do simple name mangling on the stubs. | |
1558 | Given a function name, and its type, the stub can be found. The | |
1559 | name can be changed. The only requirement is the %s be present. */ | |
1560 | #define STUB_ENTRY_NAME "__%s_veneer" | |
1561 | ||
1562 | /* The name of the dynamic interpreter. This is put in the .interp | |
1563 | section. */ | |
1564 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" | |
1565 | ||
1566 | #define AARCH64_MAX_FWD_BRANCH_OFFSET \ | |
1567 | (((1 << 25) - 1) << 2) | |
1568 | #define AARCH64_MAX_BWD_BRANCH_OFFSET \ | |
1569 | (-((1 << 25) << 2)) | |
1570 | ||
1571 | #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1) | |
1572 | #define AARCH64_MIN_ADRP_IMM (-(1 << 20)) | |
1573 | ||
1574 | static int | |
1575 | aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place) | |
1576 | { | |
1577 | bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12; | |
1578 | return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM; | |
1579 | } | |
1580 | ||
1581 | static int | |
1582 | aarch64_valid_branch_p (bfd_vma value, bfd_vma place) | |
1583 | { | |
1584 | bfd_signed_vma offset = (bfd_signed_vma) (value - place); | |
1585 | return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET | |
1586 | && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET); | |
1587 | } | |
1588 | ||
1589 | static const uint32_t aarch64_adrp_branch_stub [] = | |
1590 | { | |
1591 | 0x90000010, /* adrp ip0, X */ | |
1592 | /* R_AARCH64_ADR_HI21_PCREL(X) */ | |
1593 | 0x91000210, /* add ip0, ip0, :lo12:X */ | |
1594 | /* R_AARCH64_ADD_ABS_LO12_NC(X) */ | |
1595 | 0xd61f0200, /* br ip0 */ | |
1596 | }; | |
1597 | ||
1598 | static const uint32_t aarch64_long_branch_stub[] = | |
1599 | { | |
cec5225b | 1600 | #if ARCH_SIZE == 64 |
a06ea964 | 1601 | 0x58000090, /* ldr ip0, 1f */ |
cec5225b YZ |
1602 | #else |
1603 | 0x18000090, /* ldr wip0, 1f */ | |
1604 | #endif | |
a06ea964 NC |
1605 | 0x10000011, /* adr ip1, #0 */ |
1606 | 0x8b110210, /* add ip0, ip0, ip1 */ | |
1607 | 0xd61f0200, /* br ip0 */ | |
cec5225b YZ |
1608 | 0x00000000, /* 1: .xword or .word |
1609 | R_AARCH64_PRELNN(X) + 12 | |
a06ea964 NC |
1610 | */ |
1611 | 0x00000000, | |
1612 | }; | |
1613 | ||
1614 | /* Section name for stubs is the associated section name plus this | |
1615 | string. */ | |
1616 | #define STUB_SUFFIX ".stub" | |
1617 | ||
cec5225b | 1618 | enum elf_aarch64_stub_type |
a06ea964 NC |
1619 | { |
1620 | aarch64_stub_none, | |
1621 | aarch64_stub_adrp_branch, | |
1622 | aarch64_stub_long_branch, | |
1623 | }; | |
1624 | ||
cec5225b | 1625 | struct elf_aarch64_stub_hash_entry |
a06ea964 NC |
1626 | { |
1627 | /* Base hash table entry structure. */ | |
1628 | struct bfd_hash_entry root; | |
1629 | ||
1630 | /* The stub section. */ | |
1631 | asection *stub_sec; | |
1632 | ||
1633 | /* Offset within stub_sec of the beginning of this stub. */ | |
1634 | bfd_vma stub_offset; | |
1635 | ||
1636 | /* Given the symbol's value and its section we can determine its final | |
1637 | value when building the stubs (so the stub knows where to jump). */ | |
1638 | bfd_vma target_value; | |
1639 | asection *target_section; | |
1640 | ||
cec5225b | 1641 | enum elf_aarch64_stub_type stub_type; |
a06ea964 NC |
1642 | |
1643 | /* The symbol table entry, if any, that this was derived from. */ | |
cec5225b | 1644 | struct elf_aarch64_link_hash_entry *h; |
a06ea964 NC |
1645 | |
1646 | /* Destination symbol type */ | |
1647 | unsigned char st_type; | |
1648 | ||
1649 | /* Where this stub is being called from, or, in the case of combined | |
1650 | stub sections, the first input section in the group. */ | |
1651 | asection *id_sec; | |
1652 | ||
1653 | /* The name for the local symbol at the start of this stub. The | |
1654 | stub name in the hash table has to be unique; this does not, so | |
1655 | it can be friendlier. */ | |
1656 | char *output_name; | |
1657 | }; | |
1658 | ||
1659 | /* Used to build a map of a section. This is required for mixed-endian | |
1660 | code/data. */ | |
1661 | ||
cec5225b | 1662 | typedef struct elf_elf_section_map |
a06ea964 NC |
1663 | { |
1664 | bfd_vma vma; | |
1665 | char type; | |
1666 | } | |
cec5225b | 1667 | elf_aarch64_section_map; |
a06ea964 NC |
1668 | |
1669 | ||
1670 | typedef struct _aarch64_elf_section_data | |
1671 | { | |
1672 | struct bfd_elf_section_data elf; | |
1673 | unsigned int mapcount; | |
1674 | unsigned int mapsize; | |
cec5225b | 1675 | elf_aarch64_section_map *map; |
a06ea964 NC |
1676 | } |
1677 | _aarch64_elf_section_data; | |
1678 | ||
cec5225b | 1679 | #define elf_aarch64_section_data(sec) \ |
a06ea964 NC |
1680 | ((_aarch64_elf_section_data *) elf_section_data (sec)) |
1681 | ||
4e8516b2 AP |
1682 | /* The size of the thread control block which is defined to be two pointers. */ |
1683 | #define TCB_SIZE (ARCH_SIZE/8)*2 | |
a06ea964 NC |
1684 | |
1685 | struct elf_aarch64_local_symbol | |
1686 | { | |
1687 | unsigned int got_type; | |
1688 | bfd_signed_vma got_refcount; | |
1689 | bfd_vma got_offset; | |
1690 | ||
1691 | /* Offset of the GOTPLT entry reserved for the TLS descriptor. The | |
1692 | offset is from the end of the jump table and reserved entries | |
1693 | within the PLTGOT. | |
1694 | ||
1695 | The magic value (bfd_vma) -1 indicates that an offset has not be | |
1696 | allocated. */ | |
1697 | bfd_vma tlsdesc_got_jump_table_offset; | |
1698 | }; | |
1699 | ||
1700 | struct elf_aarch64_obj_tdata | |
1701 | { | |
1702 | struct elf_obj_tdata root; | |
1703 | ||
1704 | /* local symbol descriptors */ | |
1705 | struct elf_aarch64_local_symbol *locals; | |
1706 | ||
1707 | /* Zero to warn when linking objects with incompatible enum sizes. */ | |
1708 | int no_enum_size_warning; | |
1709 | ||
1710 | /* Zero to warn when linking objects with incompatible wchar_t sizes. */ | |
1711 | int no_wchar_size_warning; | |
1712 | }; | |
1713 | ||
1714 | #define elf_aarch64_tdata(bfd) \ | |
1715 | ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any) | |
1716 | ||
cec5225b | 1717 | #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals) |
a06ea964 NC |
1718 | |
1719 | #define is_aarch64_elf(bfd) \ | |
1720 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
1721 | && elf_tdata (bfd) != NULL \ | |
1722 | && elf_object_id (bfd) == AARCH64_ELF_DATA) | |
1723 | ||
1724 | static bfd_boolean | |
cec5225b | 1725 | elfNN_aarch64_mkobject (bfd *abfd) |
a06ea964 NC |
1726 | { |
1727 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata), | |
1728 | AARCH64_ELF_DATA); | |
1729 | } | |
1730 | ||
cec5225b YZ |
1731 | #define elf_aarch64_hash_entry(ent) \ |
1732 | ((struct elf_aarch64_link_hash_entry *)(ent)) | |
a06ea964 NC |
1733 | |
1734 | #define GOT_UNKNOWN 0 | |
1735 | #define GOT_NORMAL 1 | |
1736 | #define GOT_TLS_GD 2 | |
1737 | #define GOT_TLS_IE 4 | |
1738 | #define GOT_TLSDESC_GD 8 | |
1739 | ||
1740 | #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD)) | |
1741 | ||
1742 | /* AArch64 ELF linker hash entry. */ | |
cec5225b | 1743 | struct elf_aarch64_link_hash_entry |
a06ea964 NC |
1744 | { |
1745 | struct elf_link_hash_entry root; | |
1746 | ||
1747 | /* Track dynamic relocs copied for this symbol. */ | |
1748 | struct elf_dyn_relocs *dyn_relocs; | |
1749 | ||
a06ea964 NC |
1750 | /* Since PLT entries have variable size, we need to record the |
1751 | index into .got.plt instead of recomputing it from the PLT | |
1752 | offset. */ | |
1753 | bfd_signed_vma plt_got_offset; | |
1754 | ||
1755 | /* Bit mask representing the type of GOT entry(s) if any required by | |
1756 | this symbol. */ | |
1757 | unsigned int got_type; | |
1758 | ||
1759 | /* A pointer to the most recently used stub hash entry against this | |
1760 | symbol. */ | |
cec5225b | 1761 | struct elf_aarch64_stub_hash_entry *stub_cache; |
a06ea964 NC |
1762 | |
1763 | /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset | |
1764 | is from the end of the jump table and reserved entries within the PLTGOT. | |
1765 | ||
1766 | The magic value (bfd_vma) -1 indicates that an offset has not | |
1767 | be allocated. */ | |
1768 | bfd_vma tlsdesc_got_jump_table_offset; | |
1769 | }; | |
1770 | ||
1771 | static unsigned int | |
cec5225b | 1772 | elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h, |
a06ea964 NC |
1773 | bfd *abfd, |
1774 | unsigned long r_symndx) | |
1775 | { | |
1776 | if (h) | |
cec5225b | 1777 | return elf_aarch64_hash_entry (h)->got_type; |
a06ea964 | 1778 | |
cec5225b | 1779 | if (! elf_aarch64_locals (abfd)) |
a06ea964 NC |
1780 | return GOT_UNKNOWN; |
1781 | ||
cec5225b | 1782 | return elf_aarch64_locals (abfd)[r_symndx].got_type; |
a06ea964 NC |
1783 | } |
1784 | ||
a06ea964 | 1785 | /* Get the AArch64 elf linker hash table from a link_info structure. */ |
cec5225b YZ |
1786 | #define elf_aarch64_hash_table(info) \ |
1787 | ((struct elf_aarch64_link_hash_table *) ((info)->hash)) | |
a06ea964 NC |
1788 | |
1789 | #define aarch64_stub_hash_lookup(table, string, create, copy) \ | |
cec5225b | 1790 | ((struct elf_aarch64_stub_hash_entry *) \ |
a06ea964 NC |
1791 | bfd_hash_lookup ((table), (string), (create), (copy))) |
1792 | ||
1793 | /* AArch64 ELF linker hash table. */ | |
cec5225b | 1794 | struct elf_aarch64_link_hash_table |
a06ea964 NC |
1795 | { |
1796 | /* The main hash table. */ | |
1797 | struct elf_link_hash_table root; | |
1798 | ||
1799 | /* Nonzero to force PIC branch veneers. */ | |
1800 | int pic_veneer; | |
1801 | ||
1802 | /* The number of bytes in the initial entry in the PLT. */ | |
1803 | bfd_size_type plt_header_size; | |
1804 | ||
1805 | /* The number of bytes in the subsequent PLT etries. */ | |
1806 | bfd_size_type plt_entry_size; | |
1807 | ||
1808 | /* Short-cuts to get to dynamic linker sections. */ | |
1809 | asection *sdynbss; | |
1810 | asection *srelbss; | |
1811 | ||
1812 | /* Small local sym cache. */ | |
1813 | struct sym_cache sym_cache; | |
1814 | ||
1815 | /* For convenience in allocate_dynrelocs. */ | |
1816 | bfd *obfd; | |
1817 | ||
1818 | /* The amount of space used by the reserved portion of the sgotplt | |
1819 | section, plus whatever space is used by the jump slots. */ | |
1820 | bfd_vma sgotplt_jump_table_size; | |
1821 | ||
1822 | /* The stub hash table. */ | |
1823 | struct bfd_hash_table stub_hash_table; | |
1824 | ||
1825 | /* Linker stub bfd. */ | |
1826 | bfd *stub_bfd; | |
1827 | ||
1828 | /* Linker call-backs. */ | |
1829 | asection *(*add_stub_section) (const char *, asection *); | |
1830 | void (*layout_sections_again) (void); | |
1831 | ||
1832 | /* Array to keep track of which stub sections have been created, and | |
1833 | information on stub grouping. */ | |
1834 | struct map_stub | |
1835 | { | |
1836 | /* This is the section to which stubs in the group will be | |
1837 | attached. */ | |
1838 | asection *link_sec; | |
1839 | /* The stub section. */ | |
1840 | asection *stub_sec; | |
1841 | } *stub_group; | |
1842 | ||
cec5225b | 1843 | /* Assorted information used by elfNN_aarch64_size_stubs. */ |
a06ea964 NC |
1844 | unsigned int bfd_count; |
1845 | int top_index; | |
1846 | asection **input_list; | |
1847 | ||
1848 | /* The offset into splt of the PLT entry for the TLS descriptor | |
1849 | resolver. Special values are 0, if not necessary (or not found | |
1850 | to be necessary yet), and -1 if needed but not determined | |
1851 | yet. */ | |
1852 | bfd_vma tlsdesc_plt; | |
1853 | ||
1854 | /* The GOT offset for the lazy trampoline. Communicated to the | |
1855 | loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1 | |
1856 | indicates an offset is not allocated. */ | |
1857 | bfd_vma dt_tlsdesc_got; | |
1419bbe5 WN |
1858 | |
1859 | /* Used by local STT_GNU_IFUNC symbols. */ | |
1860 | htab_t loc_hash_table; | |
1861 | void * loc_hash_memory; | |
a06ea964 NC |
1862 | }; |
1863 | ||
a06ea964 NC |
1864 | /* Create an entry in an AArch64 ELF linker hash table. */ |
1865 | ||
1866 | static struct bfd_hash_entry * | |
cec5225b | 1867 | elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry, |
a06ea964 NC |
1868 | struct bfd_hash_table *table, |
1869 | const char *string) | |
1870 | { | |
cec5225b YZ |
1871 | struct elf_aarch64_link_hash_entry *ret = |
1872 | (struct elf_aarch64_link_hash_entry *) entry; | |
a06ea964 NC |
1873 | |
1874 | /* Allocate the structure if it has not already been allocated by a | |
1875 | subclass. */ | |
1876 | if (ret == NULL) | |
1877 | ret = bfd_hash_allocate (table, | |
cec5225b | 1878 | sizeof (struct elf_aarch64_link_hash_entry)); |
a06ea964 NC |
1879 | if (ret == NULL) |
1880 | return (struct bfd_hash_entry *) ret; | |
1881 | ||
1882 | /* Call the allocation method of the superclass. */ | |
cec5225b | 1883 | ret = ((struct elf_aarch64_link_hash_entry *) |
a06ea964 NC |
1884 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
1885 | table, string)); | |
1886 | if (ret != NULL) | |
1887 | { | |
1888 | ret->dyn_relocs = NULL; | |
a06ea964 NC |
1889 | ret->got_type = GOT_UNKNOWN; |
1890 | ret->plt_got_offset = (bfd_vma) - 1; | |
1891 | ret->stub_cache = NULL; | |
1892 | ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; | |
1893 | } | |
1894 | ||
1895 | return (struct bfd_hash_entry *) ret; | |
1896 | } | |
1897 | ||
1898 | /* Initialize an entry in the stub hash table. */ | |
1899 | ||
1900 | static struct bfd_hash_entry * | |
1901 | stub_hash_newfunc (struct bfd_hash_entry *entry, | |
1902 | struct bfd_hash_table *table, const char *string) | |
1903 | { | |
1904 | /* Allocate the structure if it has not already been allocated by a | |
1905 | subclass. */ | |
1906 | if (entry == NULL) | |
1907 | { | |
1908 | entry = bfd_hash_allocate (table, | |
1909 | sizeof (struct | |
cec5225b | 1910 | elf_aarch64_stub_hash_entry)); |
a06ea964 NC |
1911 | if (entry == NULL) |
1912 | return entry; | |
1913 | } | |
1914 | ||
1915 | /* Call the allocation method of the superclass. */ | |
1916 | entry = bfd_hash_newfunc (entry, table, string); | |
1917 | if (entry != NULL) | |
1918 | { | |
cec5225b | 1919 | struct elf_aarch64_stub_hash_entry *eh; |
a06ea964 NC |
1920 | |
1921 | /* Initialize the local fields. */ | |
cec5225b | 1922 | eh = (struct elf_aarch64_stub_hash_entry *) entry; |
a06ea964 NC |
1923 | eh->stub_sec = NULL; |
1924 | eh->stub_offset = 0; | |
1925 | eh->target_value = 0; | |
1926 | eh->target_section = NULL; | |
1927 | eh->stub_type = aarch64_stub_none; | |
1928 | eh->h = NULL; | |
1929 | eh->id_sec = NULL; | |
1930 | } | |
1931 | ||
1932 | return entry; | |
1933 | } | |
1934 | ||
1419bbe5 WN |
1935 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
1936 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
1937 | as global symbol. We reuse indx and dynstr_index for local symbol | |
1938 | hash since they aren't used by global symbols in this backend. */ | |
1939 | ||
1940 | static hashval_t | |
1941 | elfNN_aarch64_local_htab_hash (const void *ptr) | |
1942 | { | |
1943 | struct elf_link_hash_entry *h | |
1944 | = (struct elf_link_hash_entry *) ptr; | |
1945 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); | |
1946 | } | |
1947 | ||
1948 | /* Compare local hash entries. */ | |
1949 | ||
1950 | static int | |
1951 | elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2) | |
1952 | { | |
1953 | struct elf_link_hash_entry *h1 | |
1954 | = (struct elf_link_hash_entry *) ptr1; | |
1955 | struct elf_link_hash_entry *h2 | |
1956 | = (struct elf_link_hash_entry *) ptr2; | |
1957 | ||
1958 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
1959 | } | |
1960 | ||
1961 | /* Find and/or create a hash entry for local symbol. */ | |
1962 | ||
1963 | static struct elf_link_hash_entry * | |
1964 | elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab, | |
1965 | bfd *abfd, const Elf_Internal_Rela *rel, | |
1966 | bfd_boolean create) | |
1967 | { | |
1968 | struct elf_aarch64_link_hash_entry e, *ret; | |
1969 | asection *sec = abfd->sections; | |
1970 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, | |
1971 | ELFNN_R_SYM (rel->r_info)); | |
1972 | void **slot; | |
1973 | ||
1974 | e.root.indx = sec->id; | |
1975 | e.root.dynstr_index = ELFNN_R_SYM (rel->r_info); | |
1976 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
1977 | create ? INSERT : NO_INSERT); | |
1978 | ||
1979 | if (!slot) | |
1980 | return NULL; | |
1981 | ||
1982 | if (*slot) | |
1983 | { | |
1984 | ret = (struct elf_aarch64_link_hash_entry *) *slot; | |
1985 | return &ret->root; | |
1986 | } | |
1987 | ||
1988 | ret = (struct elf_aarch64_link_hash_entry *) | |
1989 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
1990 | sizeof (struct elf_aarch64_link_hash_entry)); | |
1991 | if (ret) | |
1992 | { | |
1993 | memset (ret, 0, sizeof (*ret)); | |
1994 | ret->root.indx = sec->id; | |
1995 | ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info); | |
1996 | ret->root.dynindx = -1; | |
1997 | *slot = ret; | |
1998 | } | |
1999 | return &ret->root; | |
2000 | } | |
a06ea964 NC |
2001 | |
2002 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
2003 | ||
2004 | static void | |
cec5225b | 2005 | elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info, |
a06ea964 NC |
2006 | struct elf_link_hash_entry *dir, |
2007 | struct elf_link_hash_entry *ind) | |
2008 | { | |
cec5225b | 2009 | struct elf_aarch64_link_hash_entry *edir, *eind; |
a06ea964 | 2010 | |
cec5225b YZ |
2011 | edir = (struct elf_aarch64_link_hash_entry *) dir; |
2012 | eind = (struct elf_aarch64_link_hash_entry *) ind; | |
a06ea964 NC |
2013 | |
2014 | if (eind->dyn_relocs != NULL) | |
2015 | { | |
2016 | if (edir->dyn_relocs != NULL) | |
2017 | { | |
2018 | struct elf_dyn_relocs **pp; | |
2019 | struct elf_dyn_relocs *p; | |
2020 | ||
2021 | /* Add reloc counts against the indirect sym to the direct sym | |
2022 | list. Merge any entries against the same section. */ | |
2023 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) | |
2024 | { | |
2025 | struct elf_dyn_relocs *q; | |
2026 | ||
2027 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
2028 | if (q->sec == p->sec) | |
2029 | { | |
2030 | q->pc_count += p->pc_count; | |
2031 | q->count += p->count; | |
2032 | *pp = p->next; | |
2033 | break; | |
2034 | } | |
2035 | if (q == NULL) | |
2036 | pp = &p->next; | |
2037 | } | |
2038 | *pp = edir->dyn_relocs; | |
2039 | } | |
2040 | ||
2041 | edir->dyn_relocs = eind->dyn_relocs; | |
2042 | eind->dyn_relocs = NULL; | |
2043 | } | |
2044 | ||
a06ea964 NC |
2045 | if (ind->root.type == bfd_link_hash_indirect) |
2046 | { | |
2047 | /* Copy over PLT info. */ | |
2048 | if (dir->got.refcount <= 0) | |
2049 | { | |
2050 | edir->got_type = eind->got_type; | |
2051 | eind->got_type = GOT_UNKNOWN; | |
2052 | } | |
2053 | } | |
2054 | ||
2055 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
2056 | } | |
2057 | ||
2058 | /* Create an AArch64 elf linker hash table. */ | |
2059 | ||
2060 | static struct bfd_link_hash_table * | |
cec5225b | 2061 | elfNN_aarch64_link_hash_table_create (bfd *abfd) |
a06ea964 | 2062 | { |
cec5225b YZ |
2063 | struct elf_aarch64_link_hash_table *ret; |
2064 | bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table); | |
a06ea964 | 2065 | |
7bf52ea2 | 2066 | ret = bfd_zmalloc (amt); |
a06ea964 NC |
2067 | if (ret == NULL) |
2068 | return NULL; | |
2069 | ||
2070 | if (!_bfd_elf_link_hash_table_init | |
cec5225b YZ |
2071 | (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc, |
2072 | sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA)) | |
a06ea964 NC |
2073 | { |
2074 | free (ret); | |
2075 | return NULL; | |
2076 | } | |
2077 | ||
a06ea964 NC |
2078 | ret->plt_header_size = PLT_ENTRY_SIZE; |
2079 | ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE; | |
a06ea964 | 2080 | ret->obfd = abfd; |
a06ea964 NC |
2081 | ret->dt_tlsdesc_got = (bfd_vma) - 1; |
2082 | ||
2083 | if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc, | |
cec5225b | 2084 | sizeof (struct elf_aarch64_stub_hash_entry))) |
a06ea964 NC |
2085 | { |
2086 | free (ret); | |
2087 | return NULL; | |
2088 | } | |
2089 | ||
1419bbe5 WN |
2090 | ret->loc_hash_table = htab_try_create (1024, |
2091 | elfNN_aarch64_local_htab_hash, | |
2092 | elfNN_aarch64_local_htab_eq, | |
2093 | NULL); | |
2094 | ret->loc_hash_memory = objalloc_create (); | |
2095 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
2096 | { | |
2097 | free (ret); | |
2098 | return NULL; | |
2099 | } | |
2100 | ||
a06ea964 NC |
2101 | return &ret->root.root; |
2102 | } | |
2103 | ||
2104 | /* Free the derived linker hash table. */ | |
2105 | ||
2106 | static void | |
cec5225b | 2107 | elfNN_aarch64_hash_table_free (struct bfd_link_hash_table *hash) |
a06ea964 | 2108 | { |
cec5225b YZ |
2109 | struct elf_aarch64_link_hash_table *ret |
2110 | = (struct elf_aarch64_link_hash_table *) hash; | |
a06ea964 | 2111 | |
1419bbe5 WN |
2112 | if (ret->loc_hash_table) |
2113 | htab_delete (ret->loc_hash_table); | |
2114 | if (ret->loc_hash_memory) | |
2115 | objalloc_free ((struct objalloc *) ret->loc_hash_memory); | |
2116 | ||
a06ea964 | 2117 | bfd_hash_table_free (&ret->stub_hash_table); |
9f7c3e5e | 2118 | _bfd_elf_link_hash_table_free (hash); |
a06ea964 NC |
2119 | } |
2120 | ||
a06ea964 NC |
2121 | static bfd_boolean |
2122 | aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section, | |
2123 | bfd_vma offset, bfd_vma value) | |
2124 | { | |
2125 | reloc_howto_type *howto; | |
2126 | bfd_vma place; | |
2127 | ||
cec5225b | 2128 | howto = elfNN_aarch64_howto_from_type (r_type); |
a06ea964 NC |
2129 | place = (input_section->output_section->vma + input_section->output_offset |
2130 | + offset); | |
caed7120 YZ |
2131 | |
2132 | r_type = elfNN_aarch64_bfd_reloc_from_type (r_type); | |
2133 | value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE); | |
2134 | return _bfd_aarch64_elf_put_addend (input_bfd, | |
2135 | input_section->contents + offset, r_type, | |
2136 | howto, value); | |
a06ea964 NC |
2137 | } |
2138 | ||
cec5225b | 2139 | static enum elf_aarch64_stub_type |
a06ea964 NC |
2140 | aarch64_select_branch_stub (bfd_vma value, bfd_vma place) |
2141 | { | |
2142 | if (aarch64_valid_for_adrp_p (value, place)) | |
2143 | return aarch64_stub_adrp_branch; | |
2144 | return aarch64_stub_long_branch; | |
2145 | } | |
2146 | ||
2147 | /* Determine the type of stub needed, if any, for a call. */ | |
2148 | ||
cec5225b | 2149 | static enum elf_aarch64_stub_type |
a06ea964 NC |
2150 | aarch64_type_of_stub (struct bfd_link_info *info, |
2151 | asection *input_sec, | |
2152 | const Elf_Internal_Rela *rel, | |
2153 | unsigned char st_type, | |
cec5225b | 2154 | struct elf_aarch64_link_hash_entry *hash, |
a06ea964 NC |
2155 | bfd_vma destination) |
2156 | { | |
2157 | bfd_vma location; | |
2158 | bfd_signed_vma branch_offset; | |
2159 | unsigned int r_type; | |
cec5225b YZ |
2160 | struct elf_aarch64_link_hash_table *globals; |
2161 | enum elf_aarch64_stub_type stub_type = aarch64_stub_none; | |
a06ea964 NC |
2162 | bfd_boolean via_plt_p; |
2163 | ||
2164 | if (st_type != STT_FUNC) | |
2165 | return stub_type; | |
2166 | ||
cec5225b | 2167 | globals = elf_aarch64_hash_table (info); |
a06ea964 NC |
2168 | via_plt_p = (globals->root.splt != NULL && hash != NULL |
2169 | && hash->root.plt.offset != (bfd_vma) - 1); | |
2170 | ||
2171 | if (via_plt_p) | |
2172 | return stub_type; | |
2173 | ||
2174 | /* Determine where the call point is. */ | |
2175 | location = (input_sec->output_offset | |
2176 | + input_sec->output_section->vma + rel->r_offset); | |
2177 | ||
2178 | branch_offset = (bfd_signed_vma) (destination - location); | |
2179 | ||
cec5225b | 2180 | r_type = ELFNN_R_TYPE (rel->r_info); |
a06ea964 NC |
2181 | |
2182 | /* We don't want to redirect any old unconditional jump in this way, | |
2183 | only one which is being used for a sibcall, where it is | |
2184 | acceptable for the IP0 and IP1 registers to be clobbered. */ | |
a6bb11b2 | 2185 | if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26)) |
a06ea964 NC |
2186 | && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET |
2187 | || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET)) | |
2188 | { | |
2189 | stub_type = aarch64_stub_long_branch; | |
2190 | } | |
2191 | ||
2192 | return stub_type; | |
2193 | } | |
2194 | ||
2195 | /* Build a name for an entry in the stub hash table. */ | |
2196 | ||
2197 | static char * | |
cec5225b | 2198 | elfNN_aarch64_stub_name (const asection *input_section, |
a06ea964 | 2199 | const asection *sym_sec, |
cec5225b | 2200 | const struct elf_aarch64_link_hash_entry *hash, |
a06ea964 NC |
2201 | const Elf_Internal_Rela *rel) |
2202 | { | |
2203 | char *stub_name; | |
2204 | bfd_size_type len; | |
2205 | ||
2206 | if (hash) | |
2207 | { | |
2208 | len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1; | |
2209 | stub_name = bfd_malloc (len); | |
2210 | if (stub_name != NULL) | |
2211 | snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x", | |
2212 | (unsigned int) input_section->id, | |
2213 | hash->root.root.root.string, | |
2214 | rel->r_addend); | |
2215 | } | |
2216 | else | |
2217 | { | |
2218 | len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1; | |
2219 | stub_name = bfd_malloc (len); | |
2220 | if (stub_name != NULL) | |
2221 | snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x", | |
2222 | (unsigned int) input_section->id, | |
2223 | (unsigned int) sym_sec->id, | |
cec5225b | 2224 | (unsigned int) ELFNN_R_SYM (rel->r_info), |
a06ea964 NC |
2225 | rel->r_addend); |
2226 | } | |
2227 | ||
2228 | return stub_name; | |
2229 | } | |
2230 | ||
2231 | /* Look up an entry in the stub hash. Stub entries are cached because | |
2232 | creating the stub name takes a bit of time. */ | |
2233 | ||
cec5225b YZ |
2234 | static struct elf_aarch64_stub_hash_entry * |
2235 | elfNN_aarch64_get_stub_entry (const asection *input_section, | |
a06ea964 NC |
2236 | const asection *sym_sec, |
2237 | struct elf_link_hash_entry *hash, | |
2238 | const Elf_Internal_Rela *rel, | |
cec5225b | 2239 | struct elf_aarch64_link_hash_table *htab) |
a06ea964 | 2240 | { |
cec5225b YZ |
2241 | struct elf_aarch64_stub_hash_entry *stub_entry; |
2242 | struct elf_aarch64_link_hash_entry *h = | |
2243 | (struct elf_aarch64_link_hash_entry *) hash; | |
a06ea964 NC |
2244 | const asection *id_sec; |
2245 | ||
2246 | if ((input_section->flags & SEC_CODE) == 0) | |
2247 | return NULL; | |
2248 | ||
2249 | /* If this input section is part of a group of sections sharing one | |
2250 | stub section, then use the id of the first section in the group. | |
2251 | Stub names need to include a section id, as there may well be | |
2252 | more than one stub used to reach say, printf, and we need to | |
2253 | distinguish between them. */ | |
2254 | id_sec = htab->stub_group[input_section->id].link_sec; | |
2255 | ||
2256 | if (h != NULL && h->stub_cache != NULL | |
2257 | && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec) | |
2258 | { | |
2259 | stub_entry = h->stub_cache; | |
2260 | } | |
2261 | else | |
2262 | { | |
2263 | char *stub_name; | |
2264 | ||
cec5225b | 2265 | stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel); |
a06ea964 NC |
2266 | if (stub_name == NULL) |
2267 | return NULL; | |
2268 | ||
2269 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, | |
2270 | stub_name, FALSE, FALSE); | |
2271 | if (h != NULL) | |
2272 | h->stub_cache = stub_entry; | |
2273 | ||
2274 | free (stub_name); | |
2275 | } | |
2276 | ||
2277 | return stub_entry; | |
2278 | } | |
2279 | ||
2280 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
2281 | stub entry are initialised. */ | |
2282 | ||
cec5225b YZ |
2283 | static struct elf_aarch64_stub_hash_entry * |
2284 | elfNN_aarch64_add_stub (const char *stub_name, | |
a06ea964 | 2285 | asection *section, |
cec5225b | 2286 | struct elf_aarch64_link_hash_table *htab) |
a06ea964 NC |
2287 | { |
2288 | asection *link_sec; | |
2289 | asection *stub_sec; | |
cec5225b | 2290 | struct elf_aarch64_stub_hash_entry *stub_entry; |
a06ea964 NC |
2291 | |
2292 | link_sec = htab->stub_group[section->id].link_sec; | |
2293 | stub_sec = htab->stub_group[section->id].stub_sec; | |
2294 | if (stub_sec == NULL) | |
2295 | { | |
2296 | stub_sec = htab->stub_group[link_sec->id].stub_sec; | |
2297 | if (stub_sec == NULL) | |
2298 | { | |
2299 | size_t namelen; | |
2300 | bfd_size_type len; | |
2301 | char *s_name; | |
2302 | ||
2303 | namelen = strlen (link_sec->name); | |
2304 | len = namelen + sizeof (STUB_SUFFIX); | |
2305 | s_name = bfd_alloc (htab->stub_bfd, len); | |
2306 | if (s_name == NULL) | |
2307 | return NULL; | |
2308 | ||
2309 | memcpy (s_name, link_sec->name, namelen); | |
2310 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); | |
2311 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); | |
2312 | if (stub_sec == NULL) | |
2313 | return NULL; | |
2314 | htab->stub_group[link_sec->id].stub_sec = stub_sec; | |
2315 | } | |
2316 | htab->stub_group[section->id].stub_sec = stub_sec; | |
2317 | } | |
2318 | ||
2319 | /* Enter this entry into the linker stub hash table. */ | |
2320 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, | |
2321 | TRUE, FALSE); | |
2322 | if (stub_entry == NULL) | |
2323 | { | |
2324 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), | |
2325 | section->owner, stub_name); | |
2326 | return NULL; | |
2327 | } | |
2328 | ||
2329 | stub_entry->stub_sec = stub_sec; | |
2330 | stub_entry->stub_offset = 0; | |
2331 | stub_entry->id_sec = link_sec; | |
2332 | ||
2333 | return stub_entry; | |
2334 | } | |
2335 | ||
2336 | static bfd_boolean | |
2337 | aarch64_build_one_stub (struct bfd_hash_entry *gen_entry, | |
2338 | void *in_arg ATTRIBUTE_UNUSED) | |
2339 | { | |
cec5225b | 2340 | struct elf_aarch64_stub_hash_entry *stub_entry; |
a06ea964 NC |
2341 | asection *stub_sec; |
2342 | bfd *stub_bfd; | |
2343 | bfd_byte *loc; | |
2344 | bfd_vma sym_value; | |
2345 | unsigned int template_size; | |
2346 | const uint32_t *template; | |
2347 | unsigned int i; | |
2348 | ||
2349 | /* Massage our args to the form they really have. */ | |
cec5225b | 2350 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
a06ea964 NC |
2351 | |
2352 | stub_sec = stub_entry->stub_sec; | |
2353 | ||
2354 | /* Make a note of the offset within the stubs for this entry. */ | |
2355 | stub_entry->stub_offset = stub_sec->size; | |
2356 | loc = stub_sec->contents + stub_entry->stub_offset; | |
2357 | ||
2358 | stub_bfd = stub_sec->owner; | |
2359 | ||
2360 | /* This is the address of the stub destination. */ | |
2361 | sym_value = (stub_entry->target_value | |
2362 | + stub_entry->target_section->output_offset | |
2363 | + stub_entry->target_section->output_section->vma); | |
2364 | ||
2365 | if (stub_entry->stub_type == aarch64_stub_long_branch) | |
2366 | { | |
2367 | bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma | |
2368 | + stub_sec->output_offset); | |
2369 | ||
2370 | /* See if we can relax the stub. */ | |
2371 | if (aarch64_valid_for_adrp_p (sym_value, place)) | |
2372 | stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place); | |
2373 | } | |
2374 | ||
2375 | switch (stub_entry->stub_type) | |
2376 | { | |
2377 | case aarch64_stub_adrp_branch: | |
2378 | template = aarch64_adrp_branch_stub; | |
2379 | template_size = sizeof (aarch64_adrp_branch_stub); | |
2380 | break; | |
2381 | case aarch64_stub_long_branch: | |
2382 | template = aarch64_long_branch_stub; | |
2383 | template_size = sizeof (aarch64_long_branch_stub); | |
2384 | break; | |
2385 | default: | |
2386 | BFD_FAIL (); | |
2387 | return FALSE; | |
2388 | } | |
2389 | ||
2390 | for (i = 0; i < (template_size / sizeof template[0]); i++) | |
2391 | { | |
2392 | bfd_putl32 (template[i], loc); | |
2393 | loc += 4; | |
2394 | } | |
2395 | ||
2396 | template_size = (template_size + 7) & ~7; | |
2397 | stub_sec->size += template_size; | |
2398 | ||
2399 | switch (stub_entry->stub_type) | |
2400 | { | |
2401 | case aarch64_stub_adrp_branch: | |
a6bb11b2 | 2402 | if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec, |
a06ea964 NC |
2403 | stub_entry->stub_offset, sym_value)) |
2404 | /* The stub would not have been relaxed if the offset was out | |
2405 | of range. */ | |
2406 | BFD_FAIL (); | |
2407 | ||
2408 | _bfd_final_link_relocate | |
a6bb11b2 | 2409 | (elfNN_aarch64_howto_from_type (AARCH64_R (ADD_ABS_LO12_NC)), |
a06ea964 NC |
2410 | stub_bfd, |
2411 | stub_sec, | |
2412 | stub_sec->contents, | |
2413 | stub_entry->stub_offset + 4, | |
2414 | sym_value, | |
2415 | 0); | |
2416 | break; | |
2417 | ||
2418 | case aarch64_stub_long_branch: | |
2419 | /* We want the value relative to the address 12 bytes back from the | |
2420 | value itself. */ | |
cec5225b | 2421 | _bfd_final_link_relocate (elfNN_aarch64_howto_from_type |
a6bb11b2 | 2422 | (AARCH64_R (PRELNN)), stub_bfd, stub_sec, |
a06ea964 NC |
2423 | stub_sec->contents, |
2424 | stub_entry->stub_offset + 16, | |
2425 | sym_value + 12, 0); | |
2426 | break; | |
2427 | default: | |
2428 | break; | |
2429 | } | |
2430 | ||
2431 | return TRUE; | |
2432 | } | |
2433 | ||
2434 | /* As above, but don't actually build the stub. Just bump offset so | |
2435 | we know stub section sizes. */ | |
2436 | ||
2437 | static bfd_boolean | |
2438 | aarch64_size_one_stub (struct bfd_hash_entry *gen_entry, | |
2439 | void *in_arg ATTRIBUTE_UNUSED) | |
2440 | { | |
cec5225b | 2441 | struct elf_aarch64_stub_hash_entry *stub_entry; |
a06ea964 NC |
2442 | int size; |
2443 | ||
2444 | /* Massage our args to the form they really have. */ | |
cec5225b | 2445 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
a06ea964 NC |
2446 | |
2447 | switch (stub_entry->stub_type) | |
2448 | { | |
2449 | case aarch64_stub_adrp_branch: | |
2450 | size = sizeof (aarch64_adrp_branch_stub); | |
2451 | break; | |
2452 | case aarch64_stub_long_branch: | |
2453 | size = sizeof (aarch64_long_branch_stub); | |
2454 | break; | |
2455 | default: | |
2456 | BFD_FAIL (); | |
2457 | return FALSE; | |
2458 | break; | |
2459 | } | |
2460 | ||
2461 | size = (size + 7) & ~7; | |
2462 | stub_entry->stub_sec->size += size; | |
2463 | return TRUE; | |
2464 | } | |
2465 | ||
2466 | /* External entry points for sizing and building linker stubs. */ | |
2467 | ||
2468 | /* Set up various things so that we can make a list of input sections | |
2469 | for each output section included in the link. Returns -1 on error, | |
2470 | 0 when no stubs will be needed, and 1 on success. */ | |
2471 | ||
2472 | int | |
cec5225b | 2473 | elfNN_aarch64_setup_section_lists (bfd *output_bfd, |
a06ea964 NC |
2474 | struct bfd_link_info *info) |
2475 | { | |
2476 | bfd *input_bfd; | |
2477 | unsigned int bfd_count; | |
2478 | int top_id, top_index; | |
2479 | asection *section; | |
2480 | asection **input_list, **list; | |
2481 | bfd_size_type amt; | |
cec5225b YZ |
2482 | struct elf_aarch64_link_hash_table *htab = |
2483 | elf_aarch64_hash_table (info); | |
a06ea964 NC |
2484 | |
2485 | if (!is_elf_hash_table (htab)) | |
2486 | return 0; | |
2487 | ||
2488 | /* Count the number of input BFDs and find the top input section id. */ | |
2489 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
2490 | input_bfd != NULL; input_bfd = input_bfd->link_next) | |
2491 | { | |
2492 | bfd_count += 1; | |
2493 | for (section = input_bfd->sections; | |
2494 | section != NULL; section = section->next) | |
2495 | { | |
2496 | if (top_id < section->id) | |
2497 | top_id = section->id; | |
2498 | } | |
2499 | } | |
2500 | htab->bfd_count = bfd_count; | |
2501 | ||
2502 | amt = sizeof (struct map_stub) * (top_id + 1); | |
2503 | htab->stub_group = bfd_zmalloc (amt); | |
2504 | if (htab->stub_group == NULL) | |
2505 | return -1; | |
2506 | ||
2507 | /* We can't use output_bfd->section_count here to find the top output | |
2508 | section index as some sections may have been removed, and | |
2509 | _bfd_strip_section_from_output doesn't renumber the indices. */ | |
2510 | for (section = output_bfd->sections, top_index = 0; | |
2511 | section != NULL; section = section->next) | |
2512 | { | |
2513 | if (top_index < section->index) | |
2514 | top_index = section->index; | |
2515 | } | |
2516 | ||
2517 | htab->top_index = top_index; | |
2518 | amt = sizeof (asection *) * (top_index + 1); | |
2519 | input_list = bfd_malloc (amt); | |
2520 | htab->input_list = input_list; | |
2521 | if (input_list == NULL) | |
2522 | return -1; | |
2523 | ||
2524 | /* For sections we aren't interested in, mark their entries with a | |
2525 | value we can check later. */ | |
2526 | list = input_list + top_index; | |
2527 | do | |
2528 | *list = bfd_abs_section_ptr; | |
2529 | while (list-- != input_list); | |
2530 | ||
2531 | for (section = output_bfd->sections; | |
2532 | section != NULL; section = section->next) | |
2533 | { | |
2534 | if ((section->flags & SEC_CODE) != 0) | |
2535 | input_list[section->index] = NULL; | |
2536 | } | |
2537 | ||
2538 | return 1; | |
2539 | } | |
2540 | ||
cec5225b | 2541 | /* Used by elfNN_aarch64_next_input_section and group_sections. */ |
a06ea964 NC |
2542 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) |
2543 | ||
2544 | /* The linker repeatedly calls this function for each input section, | |
2545 | in the order that input sections are linked into output sections. | |
2546 | Build lists of input sections to determine groupings between which | |
2547 | we may insert linker stubs. */ | |
2548 | ||
2549 | void | |
cec5225b | 2550 | elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec) |
a06ea964 | 2551 | { |
cec5225b YZ |
2552 | struct elf_aarch64_link_hash_table *htab = |
2553 | elf_aarch64_hash_table (info); | |
a06ea964 NC |
2554 | |
2555 | if (isec->output_section->index <= htab->top_index) | |
2556 | { | |
2557 | asection **list = htab->input_list + isec->output_section->index; | |
2558 | ||
2559 | if (*list != bfd_abs_section_ptr) | |
2560 | { | |
2561 | /* Steal the link_sec pointer for our list. */ | |
2562 | /* This happens to make the list in reverse order, | |
2563 | which is what we want. */ | |
2564 | PREV_SEC (isec) = *list; | |
2565 | *list = isec; | |
2566 | } | |
2567 | } | |
2568 | } | |
2569 | ||
2570 | /* See whether we can group stub sections together. Grouping stub | |
2571 | sections may result in fewer stubs. More importantly, we need to | |
2572 | put all .init* and .fini* stubs at the beginning of the .init or | |
2573 | .fini output sections respectively, because glibc splits the | |
2574 | _init and _fini functions into multiple parts. Putting a stub in | |
2575 | the middle of a function is not a good idea. */ | |
2576 | ||
2577 | static void | |
cec5225b | 2578 | group_sections (struct elf_aarch64_link_hash_table *htab, |
a06ea964 NC |
2579 | bfd_size_type stub_group_size, |
2580 | bfd_boolean stubs_always_before_branch) | |
2581 | { | |
2582 | asection **list = htab->input_list + htab->top_index; | |
2583 | ||
2584 | do | |
2585 | { | |
2586 | asection *tail = *list; | |
2587 | ||
2588 | if (tail == bfd_abs_section_ptr) | |
2589 | continue; | |
2590 | ||
2591 | while (tail != NULL) | |
2592 | { | |
2593 | asection *curr; | |
2594 | asection *prev; | |
2595 | bfd_size_type total; | |
2596 | ||
2597 | curr = tail; | |
2598 | total = tail->size; | |
2599 | while ((prev = PREV_SEC (curr)) != NULL | |
2600 | && ((total += curr->output_offset - prev->output_offset) | |
2601 | < stub_group_size)) | |
2602 | curr = prev; | |
2603 | ||
2604 | /* OK, the size from the start of CURR to the end is less | |
2605 | than stub_group_size and thus can be handled by one stub | |
2606 | section. (Or the tail section is itself larger than | |
2607 | stub_group_size, in which case we may be toast.) | |
2608 | We should really be keeping track of the total size of | |
2609 | stubs added here, as stubs contribute to the final output | |
2610 | section size. */ | |
2611 | do | |
2612 | { | |
2613 | prev = PREV_SEC (tail); | |
2614 | /* Set up this stub group. */ | |
2615 | htab->stub_group[tail->id].link_sec = curr; | |
2616 | } | |
2617 | while (tail != curr && (tail = prev) != NULL); | |
2618 | ||
2619 | /* But wait, there's more! Input sections up to stub_group_size | |
2620 | bytes before the stub section can be handled by it too. */ | |
2621 | if (!stubs_always_before_branch) | |
2622 | { | |
2623 | total = 0; | |
2624 | while (prev != NULL | |
2625 | && ((total += tail->output_offset - prev->output_offset) | |
2626 | < stub_group_size)) | |
2627 | { | |
2628 | tail = prev; | |
2629 | prev = PREV_SEC (tail); | |
2630 | htab->stub_group[tail->id].link_sec = curr; | |
2631 | } | |
2632 | } | |
2633 | tail = prev; | |
2634 | } | |
2635 | } | |
2636 | while (list-- != htab->input_list); | |
2637 | ||
2638 | free (htab->input_list); | |
2639 | } | |
2640 | ||
2641 | #undef PREV_SEC | |
2642 | ||
2643 | /* Determine and set the size of the stub section for a final link. | |
2644 | ||
2645 | The basic idea here is to examine all the relocations looking for | |
2646 | PC-relative calls to a target that is unreachable with a "bl" | |
2647 | instruction. */ | |
2648 | ||
2649 | bfd_boolean | |
cec5225b | 2650 | elfNN_aarch64_size_stubs (bfd *output_bfd, |
a06ea964 NC |
2651 | bfd *stub_bfd, |
2652 | struct bfd_link_info *info, | |
2653 | bfd_signed_vma group_size, | |
2654 | asection * (*add_stub_section) (const char *, | |
2655 | asection *), | |
2656 | void (*layout_sections_again) (void)) | |
2657 | { | |
2658 | bfd_size_type stub_group_size; | |
2659 | bfd_boolean stubs_always_before_branch; | |
2660 | bfd_boolean stub_changed = 0; | |
cec5225b | 2661 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); |
a06ea964 NC |
2662 | |
2663 | /* Propagate mach to stub bfd, because it may not have been | |
2664 | finalized when we created stub_bfd. */ | |
2665 | bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd), | |
2666 | bfd_get_mach (output_bfd)); | |
2667 | ||
2668 | /* Stash our params away. */ | |
2669 | htab->stub_bfd = stub_bfd; | |
2670 | htab->add_stub_section = add_stub_section; | |
2671 | htab->layout_sections_again = layout_sections_again; | |
2672 | stubs_always_before_branch = group_size < 0; | |
2673 | if (group_size < 0) | |
2674 | stub_group_size = -group_size; | |
2675 | else | |
2676 | stub_group_size = group_size; | |
2677 | ||
2678 | if (stub_group_size == 1) | |
2679 | { | |
2680 | /* Default values. */ | |
b9eead84 | 2681 | /* AArch64 branch range is +-128MB. The value used is 1MB less. */ |
a06ea964 NC |
2682 | stub_group_size = 127 * 1024 * 1024; |
2683 | } | |
2684 | ||
2685 | group_sections (htab, stub_group_size, stubs_always_before_branch); | |
2686 | ||
2687 | while (1) | |
2688 | { | |
2689 | bfd *input_bfd; | |
2690 | unsigned int bfd_indx; | |
2691 | asection *stub_sec; | |
2692 | ||
2693 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
2694 | input_bfd != NULL; input_bfd = input_bfd->link_next, bfd_indx++) | |
2695 | { | |
2696 | Elf_Internal_Shdr *symtab_hdr; | |
2697 | asection *section; | |
2698 | Elf_Internal_Sym *local_syms = NULL; | |
2699 | ||
2700 | /* We'll need the symbol table in a second. */ | |
2701 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2702 | if (symtab_hdr->sh_info == 0) | |
2703 | continue; | |
2704 | ||
2705 | /* Walk over each section attached to the input bfd. */ | |
2706 | for (section = input_bfd->sections; | |
2707 | section != NULL; section = section->next) | |
2708 | { | |
2709 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
2710 | ||
2711 | /* If there aren't any relocs, then there's nothing more | |
2712 | to do. */ | |
2713 | if ((section->flags & SEC_RELOC) == 0 | |
2714 | || section->reloc_count == 0 | |
2715 | || (section->flags & SEC_CODE) == 0) | |
2716 | continue; | |
2717 | ||
2718 | /* If this section is a link-once section that will be | |
2719 | discarded, then don't create any stubs. */ | |
2720 | if (section->output_section == NULL | |
2721 | || section->output_section->owner != output_bfd) | |
2722 | continue; | |
2723 | ||
2724 | /* Get the relocs. */ | |
2725 | internal_relocs | |
2726 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, | |
2727 | NULL, info->keep_memory); | |
2728 | if (internal_relocs == NULL) | |
2729 | goto error_ret_free_local; | |
2730 | ||
2731 | /* Now examine each relocation. */ | |
2732 | irela = internal_relocs; | |
2733 | irelaend = irela + section->reloc_count; | |
2734 | for (; irela < irelaend; irela++) | |
2735 | { | |
2736 | unsigned int r_type, r_indx; | |
cec5225b YZ |
2737 | enum elf_aarch64_stub_type stub_type; |
2738 | struct elf_aarch64_stub_hash_entry *stub_entry; | |
a06ea964 NC |
2739 | asection *sym_sec; |
2740 | bfd_vma sym_value; | |
2741 | bfd_vma destination; | |
cec5225b | 2742 | struct elf_aarch64_link_hash_entry *hash; |
a06ea964 NC |
2743 | const char *sym_name; |
2744 | char *stub_name; | |
2745 | const asection *id_sec; | |
2746 | unsigned char st_type; | |
2747 | bfd_size_type len; | |
2748 | ||
cec5225b YZ |
2749 | r_type = ELFNN_R_TYPE (irela->r_info); |
2750 | r_indx = ELFNN_R_SYM (irela->r_info); | |
a06ea964 NC |
2751 | |
2752 | if (r_type >= (unsigned int) R_AARCH64_end) | |
2753 | { | |
2754 | bfd_set_error (bfd_error_bad_value); | |
2755 | error_ret_free_internal: | |
2756 | if (elf_section_data (section)->relocs == NULL) | |
2757 | free (internal_relocs); | |
2758 | goto error_ret_free_local; | |
2759 | } | |
2760 | ||
2761 | /* Only look for stubs on unconditional branch and | |
2762 | branch and link instructions. */ | |
a6bb11b2 YZ |
2763 | if (r_type != (unsigned int) AARCH64_R (CALL26) |
2764 | && r_type != (unsigned int) AARCH64_R (JUMP26)) | |
a06ea964 NC |
2765 | continue; |
2766 | ||
2767 | /* Now determine the call target, its name, value, | |
2768 | section. */ | |
2769 | sym_sec = NULL; | |
2770 | sym_value = 0; | |
2771 | destination = 0; | |
2772 | hash = NULL; | |
2773 | sym_name = NULL; | |
2774 | if (r_indx < symtab_hdr->sh_info) | |
2775 | { | |
2776 | /* It's a local symbol. */ | |
2777 | Elf_Internal_Sym *sym; | |
2778 | Elf_Internal_Shdr *hdr; | |
2779 | ||
2780 | if (local_syms == NULL) | |
2781 | { | |
2782 | local_syms | |
2783 | = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2784 | if (local_syms == NULL) | |
2785 | local_syms | |
2786 | = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2787 | symtab_hdr->sh_info, 0, | |
2788 | NULL, NULL, NULL); | |
2789 | if (local_syms == NULL) | |
2790 | goto error_ret_free_internal; | |
2791 | } | |
2792 | ||
2793 | sym = local_syms + r_indx; | |
2794 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; | |
2795 | sym_sec = hdr->bfd_section; | |
2796 | if (!sym_sec) | |
2797 | /* This is an undefined symbol. It can never | |
2798 | be resolved. */ | |
2799 | continue; | |
2800 | ||
2801 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
2802 | sym_value = sym->st_value; | |
2803 | destination = (sym_value + irela->r_addend | |
2804 | + sym_sec->output_offset | |
2805 | + sym_sec->output_section->vma); | |
2806 | st_type = ELF_ST_TYPE (sym->st_info); | |
2807 | sym_name | |
2808 | = bfd_elf_string_from_elf_section (input_bfd, | |
2809 | symtab_hdr->sh_link, | |
2810 | sym->st_name); | |
2811 | } | |
2812 | else | |
2813 | { | |
2814 | int e_indx; | |
2815 | ||
2816 | e_indx = r_indx - symtab_hdr->sh_info; | |
cec5225b | 2817 | hash = ((struct elf_aarch64_link_hash_entry *) |
a06ea964 NC |
2818 | elf_sym_hashes (input_bfd)[e_indx]); |
2819 | ||
2820 | while (hash->root.root.type == bfd_link_hash_indirect | |
2821 | || hash->root.root.type == bfd_link_hash_warning) | |
cec5225b | 2822 | hash = ((struct elf_aarch64_link_hash_entry *) |
a06ea964 NC |
2823 | hash->root.root.u.i.link); |
2824 | ||
2825 | if (hash->root.root.type == bfd_link_hash_defined | |
2826 | || hash->root.root.type == bfd_link_hash_defweak) | |
2827 | { | |
cec5225b YZ |
2828 | struct elf_aarch64_link_hash_table *globals = |
2829 | elf_aarch64_hash_table (info); | |
a06ea964 NC |
2830 | sym_sec = hash->root.root.u.def.section; |
2831 | sym_value = hash->root.root.u.def.value; | |
2832 | /* For a destination in a shared library, | |
2833 | use the PLT stub as target address to | |
2834 | decide whether a branch stub is | |
2835 | needed. */ | |
2836 | if (globals->root.splt != NULL && hash != NULL | |
2837 | && hash->root.plt.offset != (bfd_vma) - 1) | |
2838 | { | |
2839 | sym_sec = globals->root.splt; | |
2840 | sym_value = hash->root.plt.offset; | |
2841 | if (sym_sec->output_section != NULL) | |
2842 | destination = (sym_value | |
2843 | + sym_sec->output_offset | |
2844 | + | |
2845 | sym_sec->output_section->vma); | |
2846 | } | |
2847 | else if (sym_sec->output_section != NULL) | |
2848 | destination = (sym_value + irela->r_addend | |
2849 | + sym_sec->output_offset | |
2850 | + sym_sec->output_section->vma); | |
2851 | } | |
2852 | else if (hash->root.root.type == bfd_link_hash_undefined | |
2853 | || (hash->root.root.type | |
2854 | == bfd_link_hash_undefweak)) | |
2855 | { | |
2856 | /* For a shared library, use the PLT stub as | |
2857 | target address to decide whether a long | |
2858 | branch stub is needed. | |
2859 | For absolute code, they cannot be handled. */ | |
cec5225b YZ |
2860 | struct elf_aarch64_link_hash_table *globals = |
2861 | elf_aarch64_hash_table (info); | |
a06ea964 NC |
2862 | |
2863 | if (globals->root.splt != NULL && hash != NULL | |
2864 | && hash->root.plt.offset != (bfd_vma) - 1) | |
2865 | { | |
2866 | sym_sec = globals->root.splt; | |
2867 | sym_value = hash->root.plt.offset; | |
2868 | if (sym_sec->output_section != NULL) | |
2869 | destination = (sym_value | |
2870 | + sym_sec->output_offset | |
2871 | + | |
2872 | sym_sec->output_section->vma); | |
2873 | } | |
2874 | else | |
2875 | continue; | |
2876 | } | |
2877 | else | |
2878 | { | |
2879 | bfd_set_error (bfd_error_bad_value); | |
2880 | goto error_ret_free_internal; | |
2881 | } | |
2882 | st_type = ELF_ST_TYPE (hash->root.type); | |
2883 | sym_name = hash->root.root.root.string; | |
2884 | } | |
2885 | ||
2886 | /* Determine what (if any) linker stub is needed. */ | |
2887 | stub_type = aarch64_type_of_stub | |
2888 | (info, section, irela, st_type, hash, destination); | |
2889 | if (stub_type == aarch64_stub_none) | |
2890 | continue; | |
2891 | ||
2892 | /* Support for grouping stub sections. */ | |
2893 | id_sec = htab->stub_group[section->id].link_sec; | |
2894 | ||
2895 | /* Get the name of this stub. */ | |
cec5225b | 2896 | stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash, |
a06ea964 NC |
2897 | irela); |
2898 | if (!stub_name) | |
2899 | goto error_ret_free_internal; | |
2900 | ||
2901 | stub_entry = | |
2902 | aarch64_stub_hash_lookup (&htab->stub_hash_table, | |
2903 | stub_name, FALSE, FALSE); | |
2904 | if (stub_entry != NULL) | |
2905 | { | |
2906 | /* The proper stub has already been created. */ | |
2907 | free (stub_name); | |
2908 | continue; | |
2909 | } | |
2910 | ||
cec5225b | 2911 | stub_entry = elfNN_aarch64_add_stub (stub_name, section, |
a06ea964 NC |
2912 | htab); |
2913 | if (stub_entry == NULL) | |
2914 | { | |
2915 | free (stub_name); | |
2916 | goto error_ret_free_internal; | |
2917 | } | |
2918 | ||
2919 | stub_entry->target_value = sym_value; | |
2920 | stub_entry->target_section = sym_sec; | |
2921 | stub_entry->stub_type = stub_type; | |
2922 | stub_entry->h = hash; | |
2923 | stub_entry->st_type = st_type; | |
2924 | ||
2925 | if (sym_name == NULL) | |
2926 | sym_name = "unnamed"; | |
2927 | len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name); | |
2928 | stub_entry->output_name = bfd_alloc (htab->stub_bfd, len); | |
2929 | if (stub_entry->output_name == NULL) | |
2930 | { | |
2931 | free (stub_name); | |
2932 | goto error_ret_free_internal; | |
2933 | } | |
2934 | ||
2935 | snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME, | |
2936 | sym_name); | |
2937 | ||
2938 | stub_changed = TRUE; | |
2939 | } | |
2940 | ||
2941 | /* We're done with the internal relocs, free them. */ | |
2942 | if (elf_section_data (section)->relocs == NULL) | |
2943 | free (internal_relocs); | |
2944 | } | |
2945 | } | |
2946 | ||
2947 | if (!stub_changed) | |
2948 | break; | |
2949 | ||
2950 | /* OK, we've added some stubs. Find out the new size of the | |
2951 | stub sections. */ | |
2952 | for (stub_sec = htab->stub_bfd->sections; | |
2953 | stub_sec != NULL; stub_sec = stub_sec->next) | |
2954 | stub_sec->size = 0; | |
2955 | ||
2956 | bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab); | |
2957 | ||
2958 | /* Ask the linker to do its stuff. */ | |
2959 | (*htab->layout_sections_again) (); | |
2960 | stub_changed = FALSE; | |
2961 | } | |
2962 | ||
2963 | return TRUE; | |
2964 | ||
2965 | error_ret_free_local: | |
2966 | return FALSE; | |
2967 | } | |
2968 | ||
2969 | /* Build all the stubs associated with the current output file. The | |
2970 | stubs are kept in a hash table attached to the main linker hash | |
2971 | table. We also set up the .plt entries for statically linked PIC | |
2972 | functions here. This function is called via aarch64_elf_finish in the | |
2973 | linker. */ | |
2974 | ||
2975 | bfd_boolean | |
cec5225b | 2976 | elfNN_aarch64_build_stubs (struct bfd_link_info *info) |
a06ea964 NC |
2977 | { |
2978 | asection *stub_sec; | |
2979 | struct bfd_hash_table *table; | |
cec5225b | 2980 | struct elf_aarch64_link_hash_table *htab; |
a06ea964 | 2981 | |
cec5225b | 2982 | htab = elf_aarch64_hash_table (info); |
a06ea964 NC |
2983 | |
2984 | for (stub_sec = htab->stub_bfd->sections; | |
2985 | stub_sec != NULL; stub_sec = stub_sec->next) | |
2986 | { | |
2987 | bfd_size_type size; | |
2988 | ||
2989 | /* Ignore non-stub sections. */ | |
2990 | if (!strstr (stub_sec->name, STUB_SUFFIX)) | |
2991 | continue; | |
2992 | ||
2993 | /* Allocate memory to hold the linker stubs. */ | |
2994 | size = stub_sec->size; | |
2995 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); | |
2996 | if (stub_sec->contents == NULL && size != 0) | |
2997 | return FALSE; | |
2998 | stub_sec->size = 0; | |
2999 | } | |
3000 | ||
3001 | /* Build the stubs as directed by the stub hash table. */ | |
3002 | table = &htab->stub_hash_table; | |
3003 | bfd_hash_traverse (table, aarch64_build_one_stub, info); | |
3004 | ||
3005 | return TRUE; | |
3006 | } | |
3007 | ||
3008 | ||
3009 | /* Add an entry to the code/data map for section SEC. */ | |
3010 | ||
3011 | static void | |
cec5225b | 3012 | elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma) |
a06ea964 NC |
3013 | { |
3014 | struct _aarch64_elf_section_data *sec_data = | |
cec5225b | 3015 | elf_aarch64_section_data (sec); |
a06ea964 NC |
3016 | unsigned int newidx; |
3017 | ||
3018 | if (sec_data->map == NULL) | |
3019 | { | |
cec5225b | 3020 | sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map)); |
a06ea964 NC |
3021 | sec_data->mapcount = 0; |
3022 | sec_data->mapsize = 1; | |
3023 | } | |
3024 | ||
3025 | newidx = sec_data->mapcount++; | |
3026 | ||
3027 | if (sec_data->mapcount > sec_data->mapsize) | |
3028 | { | |
3029 | sec_data->mapsize *= 2; | |
3030 | sec_data->map = bfd_realloc_or_free | |
cec5225b | 3031 | (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map)); |
a06ea964 NC |
3032 | } |
3033 | ||
3034 | if (sec_data->map) | |
3035 | { | |
3036 | sec_data->map[newidx].vma = vma; | |
3037 | sec_data->map[newidx].type = type; | |
3038 | } | |
3039 | } | |
3040 | ||
3041 | ||
3042 | /* Initialise maps of insn/data for input BFDs. */ | |
3043 | void | |
cec5225b | 3044 | bfd_elfNN_aarch64_init_maps (bfd *abfd) |
a06ea964 NC |
3045 | { |
3046 | Elf_Internal_Sym *isymbuf; | |
3047 | Elf_Internal_Shdr *hdr; | |
3048 | unsigned int i, localsyms; | |
3049 | ||
3050 | /* Make sure that we are dealing with an AArch64 elf binary. */ | |
3051 | if (!is_aarch64_elf (abfd)) | |
3052 | return; | |
3053 | ||
3054 | if ((abfd->flags & DYNAMIC) != 0) | |
3055 | return; | |
3056 | ||
3057 | hdr = &elf_symtab_hdr (abfd); | |
3058 | localsyms = hdr->sh_info; | |
3059 | ||
3060 | /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field | |
3061 | should contain the number of local symbols, which should come before any | |
3062 | global symbols. Mapping symbols are always local. */ | |
3063 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL); | |
3064 | ||
3065 | /* No internal symbols read? Skip this BFD. */ | |
3066 | if (isymbuf == NULL) | |
3067 | return; | |
3068 | ||
3069 | for (i = 0; i < localsyms; i++) | |
3070 | { | |
3071 | Elf_Internal_Sym *isym = &isymbuf[i]; | |
3072 | asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
3073 | const char *name; | |
3074 | ||
3075 | if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL) | |
3076 | { | |
3077 | name = bfd_elf_string_from_elf_section (abfd, | |
3078 | hdr->sh_link, | |
3079 | isym->st_name); | |
3080 | ||
3081 | if (bfd_is_aarch64_special_symbol_name | |
3082 | (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP)) | |
cec5225b | 3083 | elfNN_aarch64_section_map_add (sec, name[1], isym->st_value); |
a06ea964 NC |
3084 | } |
3085 | } | |
3086 | } | |
3087 | ||
3088 | /* Set option values needed during linking. */ | |
3089 | void | |
cec5225b | 3090 | bfd_elfNN_aarch64_set_options (struct bfd *output_bfd, |
a06ea964 NC |
3091 | struct bfd_link_info *link_info, |
3092 | int no_enum_warn, | |
3093 | int no_wchar_warn, int pic_veneer) | |
3094 | { | |
cec5225b | 3095 | struct elf_aarch64_link_hash_table *globals; |
a06ea964 | 3096 | |
cec5225b | 3097 | globals = elf_aarch64_hash_table (link_info); |
a06ea964 NC |
3098 | globals->pic_veneer = pic_veneer; |
3099 | ||
3100 | BFD_ASSERT (is_aarch64_elf (output_bfd)); | |
3101 | elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn; | |
3102 | elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn; | |
3103 | } | |
3104 | ||
a06ea964 NC |
3105 | static bfd_vma |
3106 | aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h, | |
cec5225b | 3107 | struct elf_aarch64_link_hash_table |
a06ea964 NC |
3108 | *globals, struct bfd_link_info *info, |
3109 | bfd_vma value, bfd *output_bfd, | |
3110 | bfd_boolean *unresolved_reloc_p) | |
3111 | { | |
3112 | bfd_vma off = (bfd_vma) - 1; | |
3113 | asection *basegot = globals->root.sgot; | |
3114 | bfd_boolean dyn = globals->root.dynamic_sections_created; | |
3115 | ||
3116 | if (h != NULL) | |
3117 | { | |
a6bb11b2 | 3118 | BFD_ASSERT (basegot != NULL); |
a06ea964 NC |
3119 | off = h->got.offset; |
3120 | BFD_ASSERT (off != (bfd_vma) - 1); | |
3121 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) | |
3122 | || (info->shared | |
3123 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
3124 | || (ELF_ST_VISIBILITY (h->other) | |
3125 | && h->root.type == bfd_link_hash_undefweak)) | |
3126 | { | |
3127 | /* This is actually a static link, or it is a -Bsymbolic link | |
3128 | and the symbol is defined locally. We must initialize this | |
3129 | entry in the global offset table. Since the offset must | |
a6bb11b2 YZ |
3130 | always be a multiple of 8 (4 in the case of ILP32), we use |
3131 | the least significant bit to record whether we have | |
3132 | initialized it already. | |
a06ea964 NC |
3133 | When doing a dynamic link, we create a .rel(a).got relocation |
3134 | entry to initialize the value. This is done in the | |
3135 | finish_dynamic_symbol routine. */ | |
3136 | if ((off & 1) != 0) | |
3137 | off &= ~1; | |
3138 | else | |
3139 | { | |
cec5225b | 3140 | bfd_put_NN (output_bfd, value, basegot->contents + off); |
a06ea964 NC |
3141 | h->got.offset |= 1; |
3142 | } | |
3143 | } | |
3144 | else | |
3145 | *unresolved_reloc_p = FALSE; | |
3146 | ||
3147 | off = off + basegot->output_section->vma + basegot->output_offset; | |
3148 | } | |
3149 | ||
3150 | return off; | |
3151 | } | |
3152 | ||
3153 | /* Change R_TYPE to a more efficient access model where possible, | |
3154 | return the new reloc type. */ | |
3155 | ||
a6bb11b2 YZ |
3156 | static bfd_reloc_code_real_type |
3157 | aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type, | |
a06ea964 NC |
3158 | struct elf_link_hash_entry *h) |
3159 | { | |
3160 | bfd_boolean is_local = h == NULL; | |
a6bb11b2 | 3161 | |
a06ea964 NC |
3162 | switch (r_type) |
3163 | { | |
a6bb11b2 YZ |
3164 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
3165 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
3166 | return (is_local | |
3167 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 | |
3168 | : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21); | |
3169 | ||
3170 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: | |
3171 | case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: | |
3172 | return (is_local | |
3173 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC | |
3174 | : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC); | |
3175 | ||
3176 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
3177 | return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type; | |
3178 | ||
3179 | case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: | |
3180 | return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type; | |
3181 | ||
3182 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: | |
3183 | case BFD_RELOC_AARCH64_TLSDESC_CALL: | |
a06ea964 | 3184 | /* Instructions with these relocations will become NOPs. */ |
a6bb11b2 YZ |
3185 | return BFD_RELOC_AARCH64_NONE; |
3186 | ||
3187 | default: | |
3188 | break; | |
a06ea964 NC |
3189 | } |
3190 | ||
3191 | return r_type; | |
3192 | } | |
3193 | ||
3194 | static unsigned int | |
a6bb11b2 | 3195 | aarch64_reloc_got_type (bfd_reloc_code_real_type r_type) |
a06ea964 NC |
3196 | { |
3197 | switch (r_type) | |
3198 | { | |
a6bb11b2 YZ |
3199 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
3200 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: | |
3201 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: | |
3202 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: | |
a06ea964 NC |
3203 | return GOT_NORMAL; |
3204 | ||
a6bb11b2 YZ |
3205 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
3206 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: | |
a06ea964 NC |
3207 | return GOT_TLS_GD; |
3208 | ||
a6bb11b2 YZ |
3209 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
3210 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
3211 | case BFD_RELOC_AARCH64_TLSDESC_CALL: | |
3212 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: | |
3213 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: | |
a06ea964 NC |
3214 | return GOT_TLSDESC_GD; |
3215 | ||
a6bb11b2 YZ |
3216 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
3217 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
3218 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: | |
a06ea964 NC |
3219 | return GOT_TLS_IE; |
3220 | ||
a6bb11b2 YZ |
3221 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
3222 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: | |
3223 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
3224 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: | |
3225 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
3226 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: | |
3227 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
3228 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
a06ea964 | 3229 | return GOT_UNKNOWN; |
a6bb11b2 YZ |
3230 | |
3231 | default: | |
3232 | break; | |
a06ea964 NC |
3233 | } |
3234 | return GOT_UNKNOWN; | |
3235 | } | |
3236 | ||
3237 | static bfd_boolean | |
3238 | aarch64_can_relax_tls (bfd *input_bfd, | |
3239 | struct bfd_link_info *info, | |
a6bb11b2 | 3240 | bfd_reloc_code_real_type r_type, |
a06ea964 NC |
3241 | struct elf_link_hash_entry *h, |
3242 | unsigned long r_symndx) | |
3243 | { | |
3244 | unsigned int symbol_got_type; | |
3245 | unsigned int reloc_got_type; | |
3246 | ||
3247 | if (! IS_AARCH64_TLS_RELOC (r_type)) | |
3248 | return FALSE; | |
3249 | ||
cec5225b | 3250 | symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx); |
a06ea964 NC |
3251 | reloc_got_type = aarch64_reloc_got_type (r_type); |
3252 | ||
3253 | if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type)) | |
3254 | return TRUE; | |
3255 | ||
3256 | if (info->shared) | |
3257 | return FALSE; | |
3258 | ||
3259 | if (h && h->root.type == bfd_link_hash_undefweak) | |
3260 | return FALSE; | |
3261 | ||
3262 | return TRUE; | |
3263 | } | |
3264 | ||
a6bb11b2 YZ |
3265 | /* Given the relocation code R_TYPE, return the relaxed bfd reloc |
3266 | enumerator. */ | |
3267 | ||
3268 | static bfd_reloc_code_real_type | |
a06ea964 NC |
3269 | aarch64_tls_transition (bfd *input_bfd, |
3270 | struct bfd_link_info *info, | |
3271 | unsigned int r_type, | |
3272 | struct elf_link_hash_entry *h, | |
3273 | unsigned long r_symndx) | |
3274 | { | |
a6bb11b2 YZ |
3275 | bfd_reloc_code_real_type bfd_r_type |
3276 | = elfNN_aarch64_bfd_reloc_from_type (r_type); | |
a06ea964 | 3277 | |
a6bb11b2 YZ |
3278 | if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx)) |
3279 | return bfd_r_type; | |
3280 | ||
3281 | return aarch64_tls_transition_without_check (bfd_r_type, h); | |
a06ea964 NC |
3282 | } |
3283 | ||
3284 | /* Return the base VMA address which should be subtracted from real addresses | |
a6bb11b2 | 3285 | when resolving R_AARCH64_TLS_DTPREL relocation. */ |
a06ea964 NC |
3286 | |
3287 | static bfd_vma | |
3288 | dtpoff_base (struct bfd_link_info *info) | |
3289 | { | |
3290 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
3291 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); | |
3292 | return elf_hash_table (info)->tls_sec->vma; | |
3293 | } | |
3294 | ||
a06ea964 NC |
3295 | /* Return the base VMA address which should be subtracted from real addresses |
3296 | when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */ | |
3297 | ||
3298 | static bfd_vma | |
3299 | tpoff_base (struct bfd_link_info *info) | |
3300 | { | |
3301 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
3302 | ||
3303 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
3304 | if (htab->tls_sec == NULL) | |
3305 | return 0; | |
3306 | ||
3307 | bfd_vma base = align_power ((bfd_vma) TCB_SIZE, | |
3308 | htab->tls_sec->alignment_power); | |
3309 | return htab->tls_sec->vma - base; | |
3310 | } | |
3311 | ||
3312 | static bfd_vma * | |
3313 | symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3314 | unsigned long r_symndx) | |
3315 | { | |
3316 | /* Calculate the address of the GOT entry for symbol | |
3317 | referred to in h. */ | |
3318 | if (h != NULL) | |
3319 | return &h->got.offset; | |
3320 | else | |
3321 | { | |
3322 | /* local symbol */ | |
3323 | struct elf_aarch64_local_symbol *l; | |
3324 | ||
cec5225b | 3325 | l = elf_aarch64_locals (input_bfd); |
a06ea964 NC |
3326 | return &l[r_symndx].got_offset; |
3327 | } | |
3328 | } | |
3329 | ||
3330 | static void | |
3331 | symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3332 | unsigned long r_symndx) | |
3333 | { | |
3334 | bfd_vma *p; | |
3335 | p = symbol_got_offset_ref (input_bfd, h, r_symndx); | |
3336 | *p |= 1; | |
3337 | } | |
3338 | ||
3339 | static int | |
3340 | symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3341 | unsigned long r_symndx) | |
3342 | { | |
3343 | bfd_vma value; | |
3344 | value = * symbol_got_offset_ref (input_bfd, h, r_symndx); | |
3345 | return value & 1; | |
3346 | } | |
3347 | ||
3348 | static bfd_vma | |
3349 | symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3350 | unsigned long r_symndx) | |
3351 | { | |
3352 | bfd_vma value; | |
3353 | value = * symbol_got_offset_ref (input_bfd, h, r_symndx); | |
3354 | value &= ~1; | |
3355 | return value; | |
3356 | } | |
3357 | ||
3358 | static bfd_vma * | |
3359 | symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3360 | unsigned long r_symndx) | |
3361 | { | |
3362 | /* Calculate the address of the GOT entry for symbol | |
3363 | referred to in h. */ | |
3364 | if (h != NULL) | |
3365 | { | |
cec5225b YZ |
3366 | struct elf_aarch64_link_hash_entry *eh; |
3367 | eh = (struct elf_aarch64_link_hash_entry *) h; | |
a06ea964 NC |
3368 | return &eh->tlsdesc_got_jump_table_offset; |
3369 | } | |
3370 | else | |
3371 | { | |
3372 | /* local symbol */ | |
3373 | struct elf_aarch64_local_symbol *l; | |
3374 | ||
cec5225b | 3375 | l = elf_aarch64_locals (input_bfd); |
a06ea964 NC |
3376 | return &l[r_symndx].tlsdesc_got_jump_table_offset; |
3377 | } | |
3378 | } | |
3379 | ||
3380 | static void | |
3381 | symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3382 | unsigned long r_symndx) | |
3383 | { | |
3384 | bfd_vma *p; | |
3385 | p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); | |
3386 | *p |= 1; | |
3387 | } | |
3388 | ||
3389 | static int | |
3390 | symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd, | |
3391 | struct elf_link_hash_entry *h, | |
3392 | unsigned long r_symndx) | |
3393 | { | |
3394 | bfd_vma value; | |
3395 | value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); | |
3396 | return value & 1; | |
3397 | } | |
3398 | ||
3399 | static bfd_vma | |
3400 | symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3401 | unsigned long r_symndx) | |
3402 | { | |
3403 | bfd_vma value; | |
3404 | value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); | |
3405 | value &= ~1; | |
3406 | return value; | |
3407 | } | |
3408 | ||
3409 | /* Perform a relocation as part of a final link. */ | |
3410 | static bfd_reloc_status_type | |
cec5225b | 3411 | elfNN_aarch64_final_link_relocate (reloc_howto_type *howto, |
a06ea964 NC |
3412 | bfd *input_bfd, |
3413 | bfd *output_bfd, | |
3414 | asection *input_section, | |
3415 | bfd_byte *contents, | |
3416 | Elf_Internal_Rela *rel, | |
3417 | bfd_vma value, | |
3418 | struct bfd_link_info *info, | |
3419 | asection *sym_sec, | |
3420 | struct elf_link_hash_entry *h, | |
3421 | bfd_boolean *unresolved_reloc_p, | |
3422 | bfd_boolean save_addend, | |
1419bbe5 WN |
3423 | bfd_vma *saved_addend, |
3424 | Elf_Internal_Sym *sym) | |
a06ea964 | 3425 | { |
1419bbe5 | 3426 | Elf_Internal_Shdr *symtab_hdr; |
a06ea964 | 3427 | unsigned int r_type = howto->type; |
a6bb11b2 YZ |
3428 | bfd_reloc_code_real_type bfd_r_type |
3429 | = elfNN_aarch64_bfd_reloc_from_howto (howto); | |
3430 | bfd_reloc_code_real_type new_bfd_r_type; | |
a06ea964 NC |
3431 | unsigned long r_symndx; |
3432 | bfd_byte *hit_data = contents + rel->r_offset; | |
3433 | bfd_vma place; | |
3434 | bfd_signed_vma signed_addend; | |
cec5225b | 3435 | struct elf_aarch64_link_hash_table *globals; |
a06ea964 NC |
3436 | bfd_boolean weak_undef_p; |
3437 | ||
cec5225b | 3438 | globals = elf_aarch64_hash_table (info); |
a06ea964 | 3439 | |
1419bbe5 WN |
3440 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
3441 | ||
a06ea964 NC |
3442 | BFD_ASSERT (is_aarch64_elf (input_bfd)); |
3443 | ||
cec5225b | 3444 | r_symndx = ELFNN_R_SYM (rel->r_info); |
a06ea964 NC |
3445 | |
3446 | /* It is possible to have linker relaxations on some TLS access | |
3447 | models. Update our information here. */ | |
a6bb11b2 YZ |
3448 | new_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx); |
3449 | if (new_bfd_r_type != bfd_r_type) | |
3450 | { | |
3451 | bfd_r_type = new_bfd_r_type; | |
3452 | howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type); | |
3453 | BFD_ASSERT (howto != NULL); | |
3454 | r_type = howto->type; | |
3455 | } | |
a06ea964 NC |
3456 | |
3457 | place = input_section->output_section->vma | |
3458 | + input_section->output_offset + rel->r_offset; | |
3459 | ||
3460 | /* Get addend, accumulating the addend for consecutive relocs | |
3461 | which refer to the same offset. */ | |
3462 | signed_addend = saved_addend ? *saved_addend : 0; | |
3463 | signed_addend += rel->r_addend; | |
3464 | ||
3465 | weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak | |
3466 | : bfd_is_und_section (sym_sec)); | |
a6bb11b2 | 3467 | |
1419bbe5 WN |
3468 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3469 | it here if it is defined in a non-shared object. */ | |
3470 | if (h != NULL | |
3471 | && h->type == STT_GNU_IFUNC | |
3472 | && h->def_regular) | |
3473 | { | |
3474 | asection *plt; | |
3475 | const char *name; | |
3476 | asection *base_got; | |
3477 | bfd_vma off; | |
3478 | ||
3479 | if ((input_section->flags & SEC_ALLOC) == 0 | |
3480 | || h->plt.offset == (bfd_vma) -1) | |
3481 | abort (); | |
3482 | ||
3483 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
3484 | plt = globals->root.splt ? globals->root.splt : globals->root.iplt; | |
3485 | value = (plt->output_section->vma + plt->output_offset + h->plt.offset); | |
3486 | ||
3487 | switch (bfd_r_type) | |
3488 | { | |
3489 | default: | |
3490 | if (h->root.root.string) | |
3491 | name = h->root.root.string; | |
3492 | else | |
3493 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3494 | NULL); | |
3495 | (*_bfd_error_handler) | |
3496 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3497 | "symbol `%s' isn't handled by %s"), input_bfd, | |
3498 | howto->name, name, __FUNCTION__); | |
3499 | bfd_set_error (bfd_error_bad_value); | |
3500 | return FALSE; | |
3501 | ||
3502 | case BFD_RELOC_AARCH64_NN: | |
3503 | if (rel->r_addend != 0) | |
3504 | { | |
3505 | if (h->root.root.string) | |
3506 | name = h->root.root.string; | |
3507 | else | |
3508 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
3509 | sym, NULL); | |
3510 | (*_bfd_error_handler) | |
3511 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3512 | "symbol `%s' has non-zero addend: %d"), | |
3513 | input_bfd, howto->name, name, rel->r_addend); | |
3514 | bfd_set_error (bfd_error_bad_value); | |
3515 | return FALSE; | |
3516 | } | |
3517 | ||
3518 | /* Generate dynamic relocation only when there is a | |
3519 | non-GOT reference in a shared object. */ | |
3520 | if (info->shared && h->non_got_ref) | |
3521 | { | |
3522 | Elf_Internal_Rela outrel; | |
3523 | asection *sreloc; | |
3524 | ||
3525 | /* Need a dynamic relocation to get the real function | |
3526 | address. */ | |
3527 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, | |
3528 | info, | |
3529 | input_section, | |
3530 | rel->r_offset); | |
3531 | if (outrel.r_offset == (bfd_vma) -1 | |
3532 | || outrel.r_offset == (bfd_vma) -2) | |
3533 | abort (); | |
3534 | ||
3535 | outrel.r_offset += (input_section->output_section->vma | |
3536 | + input_section->output_offset); | |
3537 | ||
3538 | if (h->dynindx == -1 | |
3539 | || h->forced_local | |
3540 | || info->executable) | |
3541 | { | |
3542 | /* This symbol is resolved locally. */ | |
3543 | outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE)); | |
3544 | outrel.r_addend = (h->root.u.def.value | |
3545 | + h->root.u.def.section->output_section->vma | |
3546 | + h->root.u.def.section->output_offset); | |
3547 | } | |
3548 | else | |
3549 | { | |
3550 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); | |
3551 | outrel.r_addend = 0; | |
3552 | } | |
3553 | ||
3554 | sreloc = globals->root.irelifunc; | |
3555 | elf_append_rela (output_bfd, sreloc, &outrel); | |
3556 | ||
3557 | /* If this reloc is against an external symbol, we | |
3558 | do not want to fiddle with the addend. Otherwise, | |
3559 | we need to include the symbol value so that it | |
3560 | becomes an addend for the dynamic reloc. For an | |
3561 | internal symbol, we have updated addend. */ | |
3562 | return bfd_reloc_ok; | |
3563 | } | |
3564 | /* FALLTHROUGH */ | |
3565 | case BFD_RELOC_AARCH64_JUMP26: | |
3566 | case BFD_RELOC_AARCH64_CALL26: | |
3567 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, | |
3568 | signed_addend, | |
3569 | weak_undef_p); | |
3570 | return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, | |
3571 | howto, value); | |
3572 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
3573 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: | |
3574 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: | |
3575 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: | |
3576 | base_got = globals->root.sgot; | |
3577 | off = h->got.offset; | |
3578 | ||
3579 | if (base_got == NULL) | |
3580 | abort (); | |
3581 | ||
3582 | if (off == (bfd_vma) -1) | |
3583 | { | |
3584 | bfd_vma plt_index; | |
3585 | ||
3586 | /* We can't use h->got.offset here to save state, or | |
3587 | even just remember the offset, as finish_dynamic_symbol | |
3588 | would use that as offset into .got. */ | |
3589 | ||
3590 | if (globals->root.splt != NULL) | |
3591 | { | |
b1ee0cc4 WN |
3592 | plt_index = ((h->plt.offset - globals->plt_header_size) / |
3593 | globals->plt_entry_size); | |
1419bbe5 WN |
3594 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
3595 | base_got = globals->root.sgotplt; | |
3596 | } | |
3597 | else | |
3598 | { | |
3599 | plt_index = h->plt.offset / globals->plt_entry_size; | |
3600 | off = plt_index * GOT_ENTRY_SIZE; | |
3601 | base_got = globals->root.igotplt; | |
3602 | } | |
3603 | ||
3604 | if (h->dynindx == -1 | |
3605 | || h->forced_local | |
3606 | || info->symbolic) | |
3607 | { | |
3608 | /* This references the local definition. We must | |
3609 | initialize this entry in the global offset table. | |
3610 | Since the offset must always be a multiple of 8, | |
3611 | we use the least significant bit to record | |
3612 | whether we have initialized it already. | |
3613 | ||
3614 | When doing a dynamic link, we create a .rela.got | |
3615 | relocation entry to initialize the value. This | |
3616 | is done in the finish_dynamic_symbol routine. */ | |
3617 | if ((off & 1) != 0) | |
3618 | off &= ~1; | |
3619 | else | |
3620 | { | |
3621 | bfd_put_NN (output_bfd, value, | |
3622 | base_got->contents + off); | |
3623 | /* Note that this is harmless as -1 | 1 still is -1. */ | |
3624 | h->got.offset |= 1; | |
3625 | } | |
3626 | } | |
3627 | value = (base_got->output_section->vma | |
3628 | + base_got->output_offset + off); | |
3629 | } | |
3630 | else | |
3631 | value = aarch64_calculate_got_entry_vma (h, globals, info, | |
3632 | value, output_bfd, | |
3633 | unresolved_reloc_p); | |
3634 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, | |
3635 | 0, weak_undef_p); | |
3636 | return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value); | |
3637 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: | |
3638 | case BFD_RELOC_AARCH64_ADD_LO12: | |
3639 | break; | |
3640 | } | |
3641 | } | |
3642 | ||
a6bb11b2 | 3643 | switch (bfd_r_type) |
a06ea964 | 3644 | { |
a6bb11b2 YZ |
3645 | case BFD_RELOC_AARCH64_NONE: |
3646 | case BFD_RELOC_AARCH64_TLSDESC_CALL: | |
a06ea964 NC |
3647 | *unresolved_reloc_p = FALSE; |
3648 | return bfd_reloc_ok; | |
3649 | ||
a6bb11b2 | 3650 | case BFD_RELOC_AARCH64_NN: |
a06ea964 NC |
3651 | |
3652 | /* When generating a shared object or relocatable executable, these | |
3653 | relocations are copied into the output file to be resolved at | |
3654 | run time. */ | |
3655 | if (((info->shared == TRUE) || globals->root.is_relocatable_executable) | |
3656 | && (input_section->flags & SEC_ALLOC) | |
3657 | && (h == NULL | |
3658 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3659 | || h->root.type != bfd_link_hash_undefweak)) | |
3660 | { | |
3661 | Elf_Internal_Rela outrel; | |
3662 | bfd_byte *loc; | |
3663 | bfd_boolean skip, relocate; | |
3664 | asection *sreloc; | |
3665 | ||
3666 | *unresolved_reloc_p = FALSE; | |
3667 | ||
a06ea964 NC |
3668 | skip = FALSE; |
3669 | relocate = FALSE; | |
3670 | ||
3671 | outrel.r_addend = signed_addend; | |
3672 | outrel.r_offset = | |
3673 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
3674 | rel->r_offset); | |
3675 | if (outrel.r_offset == (bfd_vma) - 1) | |
3676 | skip = TRUE; | |
3677 | else if (outrel.r_offset == (bfd_vma) - 2) | |
3678 | { | |
3679 | skip = TRUE; | |
3680 | relocate = TRUE; | |
3681 | } | |
3682 | ||
3683 | outrel.r_offset += (input_section->output_section->vma | |
3684 | + input_section->output_offset); | |
3685 | ||
3686 | if (skip) | |
3687 | memset (&outrel, 0, sizeof outrel); | |
3688 | else if (h != NULL | |
3689 | && h->dynindx != -1 | |
3690 | && (!info->shared || !info->symbolic || !h->def_regular)) | |
cec5225b | 3691 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); |
a06ea964 NC |
3692 | else |
3693 | { | |
3694 | int symbol; | |
3695 | ||
3696 | /* On SVR4-ish systems, the dynamic loader cannot | |
3697 | relocate the text and data segments independently, | |
3698 | so the symbol does not matter. */ | |
3699 | symbol = 0; | |
a6bb11b2 | 3700 | outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE)); |
a06ea964 NC |
3701 | outrel.r_addend += value; |
3702 | } | |
3703 | ||
1419bbe5 WN |
3704 | sreloc = elf_section_data (input_section)->sreloc; |
3705 | if (sreloc == NULL || sreloc->contents == NULL) | |
3706 | return bfd_reloc_notsupported; | |
3707 | ||
3708 | loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals); | |
cec5225b | 3709 | bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc); |
a06ea964 | 3710 | |
1419bbe5 | 3711 | if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size) |
a06ea964 NC |
3712 | { |
3713 | /* Sanity to check that we have previously allocated | |
3714 | sufficient space in the relocation section for the | |
3715 | number of relocations we actually want to emit. */ | |
3716 | abort (); | |
3717 | } | |
3718 | ||
3719 | /* If this reloc is against an external symbol, we do not want to | |
3720 | fiddle with the addend. Otherwise, we need to include the symbol | |
3721 | value so that it becomes an addend for the dynamic reloc. */ | |
3722 | if (!relocate) | |
3723 | return bfd_reloc_ok; | |
3724 | ||
3725 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3726 | contents, rel->r_offset, value, | |
3727 | signed_addend); | |
3728 | } | |
3729 | else | |
3730 | value += signed_addend; | |
3731 | break; | |
3732 | ||
a6bb11b2 YZ |
3733 | case BFD_RELOC_AARCH64_JUMP26: |
3734 | case BFD_RELOC_AARCH64_CALL26: | |
a06ea964 NC |
3735 | { |
3736 | asection *splt = globals->root.splt; | |
3737 | bfd_boolean via_plt_p = | |
3738 | splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1; | |
3739 | ||
3740 | /* A call to an undefined weak symbol is converted to a jump to | |
3741 | the next instruction unless a PLT entry will be created. | |
3742 | The jump to the next instruction is optimized as a NOP. | |
3743 | Do the same for local undefined symbols. */ | |
3744 | if (weak_undef_p && ! via_plt_p) | |
3745 | { | |
3746 | bfd_putl32 (INSN_NOP, hit_data); | |
3747 | return bfd_reloc_ok; | |
3748 | } | |
3749 | ||
3750 | /* If the call goes through a PLT entry, make sure to | |
3751 | check distance to the right destination address. */ | |
3752 | if (via_plt_p) | |
3753 | { | |
3754 | value = (splt->output_section->vma | |
3755 | + splt->output_offset + h->plt.offset); | |
3756 | *unresolved_reloc_p = FALSE; | |
3757 | } | |
3758 | ||
3759 | /* If the target symbol is global and marked as a function the | |
3760 | relocation applies a function call or a tail call. In this | |
3761 | situation we can veneer out of range branches. The veneers | |
3762 | use IP0 and IP1 hence cannot be used arbitrary out of range | |
3763 | branches that occur within the body of a function. */ | |
3764 | if (h && h->type == STT_FUNC) | |
3765 | { | |
3766 | /* Check if a stub has to be inserted because the destination | |
3767 | is too far away. */ | |
3768 | if (! aarch64_valid_branch_p (value, place)) | |
3769 | { | |
3770 | /* The target is out of reach, so redirect the branch to | |
3771 | the local stub for this function. */ | |
cec5225b YZ |
3772 | struct elf_aarch64_stub_hash_entry *stub_entry; |
3773 | stub_entry = elfNN_aarch64_get_stub_entry (input_section, | |
a06ea964 NC |
3774 | sym_sec, h, |
3775 | rel, globals); | |
3776 | if (stub_entry != NULL) | |
3777 | value = (stub_entry->stub_offset | |
3778 | + stub_entry->stub_sec->output_offset | |
3779 | + stub_entry->stub_sec->output_section->vma); | |
3780 | } | |
3781 | } | |
3782 | } | |
caed7120 YZ |
3783 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
3784 | signed_addend, weak_undef_p); | |
a06ea964 NC |
3785 | break; |
3786 | ||
a6bb11b2 YZ |
3787 | case BFD_RELOC_AARCH64_16: |
3788 | #if ARCH_SIZE == 64 | |
3789 | case BFD_RELOC_AARCH64_32: | |
3790 | #endif | |
3791 | case BFD_RELOC_AARCH64_ADD_LO12: | |
3792 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: | |
3793 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: | |
3794 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: | |
3795 | case BFD_RELOC_AARCH64_BRANCH19: | |
3796 | case BFD_RELOC_AARCH64_LD_LO19_PCREL: | |
3797 | case BFD_RELOC_AARCH64_LDST8_LO12: | |
3798 | case BFD_RELOC_AARCH64_LDST16_LO12: | |
3799 | case BFD_RELOC_AARCH64_LDST32_LO12: | |
3800 | case BFD_RELOC_AARCH64_LDST64_LO12: | |
3801 | case BFD_RELOC_AARCH64_LDST128_LO12: | |
3802 | case BFD_RELOC_AARCH64_MOVW_G0_S: | |
3803 | case BFD_RELOC_AARCH64_MOVW_G1_S: | |
3804 | case BFD_RELOC_AARCH64_MOVW_G2_S: | |
3805 | case BFD_RELOC_AARCH64_MOVW_G0: | |
3806 | case BFD_RELOC_AARCH64_MOVW_G0_NC: | |
3807 | case BFD_RELOC_AARCH64_MOVW_G1: | |
3808 | case BFD_RELOC_AARCH64_MOVW_G1_NC: | |
3809 | case BFD_RELOC_AARCH64_MOVW_G2: | |
3810 | case BFD_RELOC_AARCH64_MOVW_G2_NC: | |
3811 | case BFD_RELOC_AARCH64_MOVW_G3: | |
3812 | case BFD_RELOC_AARCH64_16_PCREL: | |
3813 | case BFD_RELOC_AARCH64_32_PCREL: | |
3814 | case BFD_RELOC_AARCH64_64_PCREL: | |
3815 | case BFD_RELOC_AARCH64_TSTBR14: | |
caed7120 YZ |
3816 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
3817 | signed_addend, weak_undef_p); | |
a06ea964 NC |
3818 | break; |
3819 | ||
a6bb11b2 YZ |
3820 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
3821 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: | |
3822 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: | |
3823 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: | |
a06ea964 NC |
3824 | if (globals->root.sgot == NULL) |
3825 | BFD_ASSERT (h != NULL); | |
3826 | ||
3827 | if (h != NULL) | |
3828 | { | |
3829 | value = aarch64_calculate_got_entry_vma (h, globals, info, value, | |
3830 | output_bfd, | |
3831 | unresolved_reloc_p); | |
caed7120 YZ |
3832 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
3833 | 0, weak_undef_p); | |
a06ea964 NC |
3834 | } |
3835 | break; | |
3836 | ||
a6bb11b2 YZ |
3837 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
3838 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: | |
3839 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
3840 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
3841 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: | |
a06ea964 NC |
3842 | if (globals->root.sgot == NULL) |
3843 | return bfd_reloc_notsupported; | |
3844 | ||
3845 | value = (symbol_got_offset (input_bfd, h, r_symndx) | |
3846 | + globals->root.sgot->output_section->vma | |
3847 | + globals->root.sgot->output_section->output_offset); | |
3848 | ||
caed7120 YZ |
3849 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
3850 | 0, weak_undef_p); | |
a06ea964 NC |
3851 | *unresolved_reloc_p = FALSE; |
3852 | break; | |
3853 | ||
a6bb11b2 YZ |
3854 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
3855 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: | |
3856 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
3857 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: | |
3858 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
3859 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: | |
3860 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
3861 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
caed7120 YZ |
3862 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
3863 | signed_addend - tpoff_base (info), | |
3864 | weak_undef_p); | |
a06ea964 NC |
3865 | *unresolved_reloc_p = FALSE; |
3866 | break; | |
3867 | ||
7bcccb57 MS |
3868 | case BFD_RELOC_AARCH64_TLSDESC_ADD: |
3869 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: | |
a6bb11b2 | 3870 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
a6bb11b2 | 3871 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
7bcccb57 | 3872 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: |
a6bb11b2 | 3873 | case BFD_RELOC_AARCH64_TLSDESC_LDR: |
a06ea964 NC |
3874 | if (globals->root.sgot == NULL) |
3875 | return bfd_reloc_notsupported; | |
3876 | ||
3877 | value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx) | |
3878 | + globals->root.sgotplt->output_section->vma | |
3879 | + globals->root.sgotplt->output_section->output_offset | |
3880 | + globals->sgotplt_jump_table_size); | |
3881 | ||
caed7120 YZ |
3882 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
3883 | 0, weak_undef_p); | |
a06ea964 NC |
3884 | *unresolved_reloc_p = FALSE; |
3885 | break; | |
3886 | ||
3887 | default: | |
3888 | return bfd_reloc_notsupported; | |
3889 | } | |
3890 | ||
3891 | if (saved_addend) | |
3892 | *saved_addend = value; | |
3893 | ||
3894 | /* Only apply the final relocation in a sequence. */ | |
3895 | if (save_addend) | |
3896 | return bfd_reloc_continue; | |
3897 | ||
caed7120 YZ |
3898 | return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, |
3899 | howto, value); | |
a06ea964 NC |
3900 | } |
3901 | ||
3902 | /* Handle TLS relaxations. Relaxing is possible for symbols that use | |
3903 | R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static | |
3904 | link. | |
3905 | ||
3906 | Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller | |
3907 | is to then call final_link_relocate. Return other values in the | |
3908 | case of error. */ | |
3909 | ||
3910 | static bfd_reloc_status_type | |
cec5225b | 3911 | elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, |
a06ea964 NC |
3912 | bfd *input_bfd, bfd_byte *contents, |
3913 | Elf_Internal_Rela *rel, struct elf_link_hash_entry *h) | |
3914 | { | |
3915 | bfd_boolean is_local = h == NULL; | |
cec5225b | 3916 | unsigned int r_type = ELFNN_R_TYPE (rel->r_info); |
a06ea964 NC |
3917 | unsigned long insn; |
3918 | ||
3919 | BFD_ASSERT (globals && input_bfd && contents && rel); | |
3920 | ||
a6bb11b2 | 3921 | switch (elfNN_aarch64_bfd_reloc_from_type (r_type)) |
a06ea964 | 3922 | { |
a6bb11b2 YZ |
3923 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
3924 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
a06ea964 NC |
3925 | if (is_local) |
3926 | { | |
3927 | /* GD->LE relaxation: | |
3928 | adrp x0, :tlsgd:var => movz x0, :tprel_g1:var | |
3929 | or | |
3930 | adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var | |
3931 | */ | |
3932 | bfd_putl32 (0xd2a00000, contents + rel->r_offset); | |
3933 | return bfd_reloc_continue; | |
3934 | } | |
3935 | else | |
3936 | { | |
3937 | /* GD->IE relaxation: | |
3938 | adrp x0, :tlsgd:var => adrp x0, :gottprel:var | |
3939 | or | |
3940 | adrp x0, :tlsdesc:var => adrp x0, :gottprel:var | |
3941 | */ | |
3942 | insn = bfd_getl32 (contents + rel->r_offset); | |
3943 | return bfd_reloc_continue; | |
3944 | } | |
3945 | ||
a6bb11b2 | 3946 | case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: |
a06ea964 NC |
3947 | if (is_local) |
3948 | { | |
3949 | /* GD->LE relaxation: | |
3950 | ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var | |
3951 | */ | |
3952 | bfd_putl32 (0xf2800000, contents + rel->r_offset); | |
3953 | return bfd_reloc_continue; | |
3954 | } | |
3955 | else | |
3956 | { | |
3957 | /* GD->IE relaxation: | |
3958 | ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var] | |
3959 | */ | |
3960 | insn = bfd_getl32 (contents + rel->r_offset); | |
3961 | insn &= 0xfffffff0; | |
3962 | bfd_putl32 (insn, contents + rel->r_offset); | |
3963 | return bfd_reloc_continue; | |
3964 | } | |
3965 | ||
a6bb11b2 | 3966 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
a06ea964 NC |
3967 | if (is_local) |
3968 | { | |
3969 | /* GD->LE relaxation | |
3970 | add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var | |
3971 | bl __tls_get_addr => mrs x1, tpidr_el0 | |
3972 | nop => add x0, x1, x0 | |
3973 | */ | |
3974 | ||
3975 | /* First kill the tls_get_addr reloc on the bl instruction. */ | |
3976 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); | |
cec5225b | 3977 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
a06ea964 NC |
3978 | |
3979 | bfd_putl32 (0xf2800000, contents + rel->r_offset); | |
3980 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4); | |
3981 | bfd_putl32 (0x8b000020, contents + rel->r_offset + 8); | |
3982 | return bfd_reloc_continue; | |
3983 | } | |
3984 | else | |
3985 | { | |
3986 | /* GD->IE relaxation | |
3987 | ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var] | |
3988 | BL __tls_get_addr => mrs x1, tpidr_el0 | |
3989 | R_AARCH64_CALL26 | |
3990 | NOP => add x0, x1, x0 | |
3991 | */ | |
3992 | ||
a6bb11b2 | 3993 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26)); |
a06ea964 NC |
3994 | |
3995 | /* Remove the relocation on the BL instruction. */ | |
cec5225b | 3996 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
a06ea964 NC |
3997 | |
3998 | bfd_putl32 (0xf9400000, contents + rel->r_offset); | |
3999 | ||
4000 | /* We choose to fixup the BL and NOP instructions using the | |
4001 | offset from the second relocation to allow flexibility in | |
4002 | scheduling instructions between the ADD and BL. */ | |
4003 | bfd_putl32 (0xd53bd041, contents + rel[1].r_offset); | |
4004 | bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4); | |
4005 | return bfd_reloc_continue; | |
4006 | } | |
4007 | ||
a6bb11b2 YZ |
4008 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
4009 | case BFD_RELOC_AARCH64_TLSDESC_CALL: | |
a06ea964 NC |
4010 | /* GD->IE/LE relaxation: |
4011 | add x0, x0, #:tlsdesc_lo12:var => nop | |
4012 | blr xd => nop | |
4013 | */ | |
4014 | bfd_putl32 (INSN_NOP, contents + rel->r_offset); | |
4015 | return bfd_reloc_ok; | |
4016 | ||
a6bb11b2 | 4017 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
a06ea964 NC |
4018 | /* IE->LE relaxation: |
4019 | adrp xd, :gottprel:var => movz xd, :tprel_g1:var | |
4020 | */ | |
4021 | if (is_local) | |
4022 | { | |
4023 | insn = bfd_getl32 (contents + rel->r_offset); | |
4024 | bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset); | |
4025 | } | |
4026 | return bfd_reloc_continue; | |
4027 | ||
a6bb11b2 | 4028 | case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: |
a06ea964 NC |
4029 | /* IE->LE relaxation: |
4030 | ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var | |
4031 | */ | |
4032 | if (is_local) | |
4033 | { | |
4034 | insn = bfd_getl32 (contents + rel->r_offset); | |
4035 | bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset); | |
4036 | } | |
4037 | return bfd_reloc_continue; | |
4038 | ||
4039 | default: | |
4040 | return bfd_reloc_continue; | |
4041 | } | |
4042 | ||
4043 | return bfd_reloc_ok; | |
4044 | } | |
4045 | ||
4046 | /* Relocate an AArch64 ELF section. */ | |
4047 | ||
4048 | static bfd_boolean | |
cec5225b | 4049 | elfNN_aarch64_relocate_section (bfd *output_bfd, |
a06ea964 NC |
4050 | struct bfd_link_info *info, |
4051 | bfd *input_bfd, | |
4052 | asection *input_section, | |
4053 | bfd_byte *contents, | |
4054 | Elf_Internal_Rela *relocs, | |
4055 | Elf_Internal_Sym *local_syms, | |
4056 | asection **local_sections) | |
4057 | { | |
4058 | Elf_Internal_Shdr *symtab_hdr; | |
4059 | struct elf_link_hash_entry **sym_hashes; | |
4060 | Elf_Internal_Rela *rel; | |
4061 | Elf_Internal_Rela *relend; | |
4062 | const char *name; | |
cec5225b | 4063 | struct elf_aarch64_link_hash_table *globals; |
a06ea964 NC |
4064 | bfd_boolean save_addend = FALSE; |
4065 | bfd_vma addend = 0; | |
4066 | ||
cec5225b | 4067 | globals = elf_aarch64_hash_table (info); |
a06ea964 NC |
4068 | |
4069 | symtab_hdr = &elf_symtab_hdr (input_bfd); | |
4070 | sym_hashes = elf_sym_hashes (input_bfd); | |
4071 | ||
4072 | rel = relocs; | |
4073 | relend = relocs + input_section->reloc_count; | |
4074 | for (; rel < relend; rel++) | |
4075 | { | |
4076 | unsigned int r_type; | |
a6bb11b2 YZ |
4077 | bfd_reloc_code_real_type bfd_r_type; |
4078 | bfd_reloc_code_real_type relaxed_bfd_r_type; | |
a06ea964 NC |
4079 | reloc_howto_type *howto; |
4080 | unsigned long r_symndx; | |
4081 | Elf_Internal_Sym *sym; | |
4082 | asection *sec; | |
4083 | struct elf_link_hash_entry *h; | |
4084 | bfd_vma relocation; | |
4085 | bfd_reloc_status_type r; | |
4086 | arelent bfd_reloc; | |
4087 | char sym_type; | |
4088 | bfd_boolean unresolved_reloc = FALSE; | |
4089 | char *error_message = NULL; | |
4090 | ||
cec5225b YZ |
4091 | r_symndx = ELFNN_R_SYM (rel->r_info); |
4092 | r_type = ELFNN_R_TYPE (rel->r_info); | |
a06ea964 | 4093 | |
cec5225b | 4094 | bfd_reloc.howto = elfNN_aarch64_howto_from_type (r_type); |
a06ea964 NC |
4095 | howto = bfd_reloc.howto; |
4096 | ||
7fcfd62d NC |
4097 | if (howto == NULL) |
4098 | { | |
4099 | (*_bfd_error_handler) | |
4100 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), | |
4101 | input_bfd, input_section, r_type); | |
4102 | return FALSE; | |
4103 | } | |
a6bb11b2 | 4104 | bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto); |
7fcfd62d | 4105 | |
a06ea964 NC |
4106 | h = NULL; |
4107 | sym = NULL; | |
4108 | sec = NULL; | |
4109 | ||
4110 | if (r_symndx < symtab_hdr->sh_info) | |
4111 | { | |
4112 | sym = local_syms + r_symndx; | |
cec5225b | 4113 | sym_type = ELFNN_ST_TYPE (sym->st_info); |
a06ea964 NC |
4114 | sec = local_sections[r_symndx]; |
4115 | ||
4116 | /* An object file might have a reference to a local | |
4117 | undefined symbol. This is a daft object file, but we | |
4118 | should at least do something about it. */ | |
4119 | if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL | |
4120 | && bfd_is_und_section (sec) | |
4121 | && ELF_ST_BIND (sym->st_info) != STB_WEAK) | |
4122 | { | |
4123 | if (!info->callbacks->undefined_symbol | |
4124 | (info, bfd_elf_string_from_elf_section | |
4125 | (input_bfd, symtab_hdr->sh_link, sym->st_name), | |
4126 | input_bfd, input_section, rel->r_offset, TRUE)) | |
4127 | return FALSE; | |
4128 | } | |
4129 | ||
a06ea964 | 4130 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
1419bbe5 WN |
4131 | |
4132 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
4133 | if (!info->relocatable | |
4134 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
4135 | { | |
4136 | h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd, | |
4137 | rel, FALSE); | |
4138 | if (h == NULL) | |
4139 | abort (); | |
4140 | ||
4141 | /* Set STT_GNU_IFUNC symbol value. */ | |
4142 | h->root.u.def.value = sym->st_value; | |
4143 | h->root.u.def.section = sec; | |
4144 | } | |
a06ea964 NC |
4145 | } |
4146 | else | |
4147 | { | |
62d887d4 | 4148 | bfd_boolean warned, ignored; |
a06ea964 NC |
4149 | |
4150 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
4151 | r_symndx, symtab_hdr, sym_hashes, | |
4152 | h, sec, relocation, | |
62d887d4 | 4153 | unresolved_reloc, warned, ignored); |
a06ea964 NC |
4154 | |
4155 | sym_type = h->type; | |
4156 | } | |
4157 | ||
4158 | if (sec != NULL && discarded_section (sec)) | |
4159 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
4160 | rel, 1, relend, howto, 0, contents); | |
4161 | ||
4162 | if (info->relocatable) | |
4163 | { | |
4164 | /* This is a relocatable link. We don't have to change | |
4165 | anything, unless the reloc is against a section symbol, | |
4166 | in which case we have to adjust according to where the | |
4167 | section symbol winds up in the output section. */ | |
4168 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
4169 | rel->r_addend += sec->output_offset; | |
4170 | continue; | |
4171 | } | |
4172 | ||
4173 | if (h != NULL) | |
4174 | name = h->root.root.string; | |
4175 | else | |
4176 | { | |
4177 | name = (bfd_elf_string_from_elf_section | |
4178 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
4179 | if (name == NULL || *name == '\0') | |
4180 | name = bfd_section_name (input_bfd, sec); | |
4181 | } | |
4182 | ||
4183 | if (r_symndx != 0 | |
4184 | && r_type != R_AARCH64_NONE | |
4185 | && r_type != R_AARCH64_NULL | |
4186 | && (h == NULL | |
4187 | || h->root.type == bfd_link_hash_defined | |
4188 | || h->root.type == bfd_link_hash_defweak) | |
a6bb11b2 | 4189 | && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS)) |
a06ea964 NC |
4190 | { |
4191 | (*_bfd_error_handler) | |
4192 | ((sym_type == STT_TLS | |
4193 | ? _("%B(%A+0x%lx): %s used with TLS symbol %s") | |
4194 | : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), | |
4195 | input_bfd, | |
4196 | input_section, (long) rel->r_offset, howto->name, name); | |
4197 | } | |
4198 | ||
a06ea964 NC |
4199 | /* We relax only if we can see that there can be a valid transition |
4200 | from a reloc type to another. | |
cec5225b | 4201 | We call elfNN_aarch64_final_link_relocate unless we're completely |
a06ea964 NC |
4202 | done, i.e., the relaxation produced the final output we want. */ |
4203 | ||
a6bb11b2 YZ |
4204 | relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, |
4205 | h, r_symndx); | |
4206 | if (relaxed_bfd_r_type != bfd_r_type) | |
a06ea964 | 4207 | { |
a6bb11b2 YZ |
4208 | bfd_r_type = relaxed_bfd_r_type; |
4209 | howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type); | |
4210 | BFD_ASSERT (howto != NULL); | |
4211 | r_type = howto->type; | |
cec5225b | 4212 | r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h); |
a06ea964 NC |
4213 | unresolved_reloc = 0; |
4214 | } | |
4215 | else | |
4216 | r = bfd_reloc_continue; | |
4217 | ||
4218 | /* There may be multiple consecutive relocations for the | |
4219 | same offset. In that case we are supposed to treat the | |
4220 | output of each relocation as the addend for the next. */ | |
4221 | if (rel + 1 < relend | |
4222 | && rel->r_offset == rel[1].r_offset | |
cec5225b YZ |
4223 | && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE |
4224 | && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL) | |
a06ea964 NC |
4225 | save_addend = TRUE; |
4226 | else | |
4227 | save_addend = FALSE; | |
4228 | ||
4229 | if (r == bfd_reloc_continue) | |
cec5225b | 4230 | r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd, |
a06ea964 NC |
4231 | input_section, contents, rel, |
4232 | relocation, info, sec, | |
4233 | h, &unresolved_reloc, | |
1419bbe5 | 4234 | save_addend, &addend, sym); |
a06ea964 | 4235 | |
a6bb11b2 | 4236 | switch (elfNN_aarch64_bfd_reloc_from_type (r_type)) |
a06ea964 | 4237 | { |
a6bb11b2 YZ |
4238 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
4239 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: | |
a06ea964 NC |
4240 | if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) |
4241 | { | |
4242 | bfd_boolean need_relocs = FALSE; | |
4243 | bfd_byte *loc; | |
4244 | int indx; | |
4245 | bfd_vma off; | |
4246 | ||
4247 | off = symbol_got_offset (input_bfd, h, r_symndx); | |
4248 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
4249 | ||
4250 | need_relocs = | |
4251 | (info->shared || indx != 0) && | |
4252 | (h == NULL | |
4253 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
4254 | || h->root.type != bfd_link_hash_undefweak); | |
4255 | ||
4256 | BFD_ASSERT (globals->root.srelgot != NULL); | |
4257 | ||
4258 | if (need_relocs) | |
4259 | { | |
4260 | Elf_Internal_Rela rela; | |
a6bb11b2 | 4261 | rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD)); |
a06ea964 NC |
4262 | rela.r_addend = 0; |
4263 | rela.r_offset = globals->root.sgot->output_section->vma + | |
4264 | globals->root.sgot->output_offset + off; | |
4265 | ||
4266 | ||
4267 | loc = globals->root.srelgot->contents; | |
4268 | loc += globals->root.srelgot->reloc_count++ | |
4269 | * RELOC_SIZE (htab); | |
cec5225b | 4270 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
a06ea964 NC |
4271 | |
4272 | if (indx == 0) | |
4273 | { | |
cec5225b | 4274 | bfd_put_NN (output_bfd, |
a06ea964 NC |
4275 | relocation - dtpoff_base (info), |
4276 | globals->root.sgot->contents + off | |
4277 | + GOT_ENTRY_SIZE); | |
4278 | } | |
4279 | else | |
4280 | { | |
4281 | /* This TLS symbol is global. We emit a | |
4282 | relocation to fixup the tls offset at load | |
4283 | time. */ | |
4284 | rela.r_info = | |
a6bb11b2 | 4285 | ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL)); |
a06ea964 NC |
4286 | rela.r_addend = 0; |
4287 | rela.r_offset = | |
4288 | (globals->root.sgot->output_section->vma | |
4289 | + globals->root.sgot->output_offset + off | |
4290 | + GOT_ENTRY_SIZE); | |
4291 | ||
4292 | loc = globals->root.srelgot->contents; | |
4293 | loc += globals->root.srelgot->reloc_count++ | |
4294 | * RELOC_SIZE (globals); | |
cec5225b YZ |
4295 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
4296 | bfd_put_NN (output_bfd, (bfd_vma) 0, | |
a06ea964 NC |
4297 | globals->root.sgot->contents + off |
4298 | + GOT_ENTRY_SIZE); | |
4299 | } | |
4300 | } | |
4301 | else | |
4302 | { | |
cec5225b | 4303 | bfd_put_NN (output_bfd, (bfd_vma) 1, |
a06ea964 | 4304 | globals->root.sgot->contents + off); |
cec5225b | 4305 | bfd_put_NN (output_bfd, |
a06ea964 NC |
4306 | relocation - dtpoff_base (info), |
4307 | globals->root.sgot->contents + off | |
4308 | + GOT_ENTRY_SIZE); | |
4309 | } | |
4310 | ||
4311 | symbol_got_offset_mark (input_bfd, h, r_symndx); | |
4312 | } | |
4313 | break; | |
4314 | ||
a6bb11b2 YZ |
4315 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
4316 | case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: | |
a06ea964 NC |
4317 | if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) |
4318 | { | |
4319 | bfd_boolean need_relocs = FALSE; | |
4320 | bfd_byte *loc; | |
4321 | int indx; | |
4322 | bfd_vma off; | |
4323 | ||
4324 | off = symbol_got_offset (input_bfd, h, r_symndx); | |
4325 | ||
4326 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
4327 | ||
4328 | need_relocs = | |
4329 | (info->shared || indx != 0) && | |
4330 | (h == NULL | |
4331 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
4332 | || h->root.type != bfd_link_hash_undefweak); | |
4333 | ||
4334 | BFD_ASSERT (globals->root.srelgot != NULL); | |
4335 | ||
4336 | if (need_relocs) | |
4337 | { | |
4338 | Elf_Internal_Rela rela; | |
4339 | ||
4340 | if (indx == 0) | |
4341 | rela.r_addend = relocation - dtpoff_base (info); | |
4342 | else | |
4343 | rela.r_addend = 0; | |
4344 | ||
a6bb11b2 | 4345 | rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL)); |
a06ea964 NC |
4346 | rela.r_offset = globals->root.sgot->output_section->vma + |
4347 | globals->root.sgot->output_offset + off; | |
4348 | ||
4349 | loc = globals->root.srelgot->contents; | |
4350 | loc += globals->root.srelgot->reloc_count++ | |
4351 | * RELOC_SIZE (htab); | |
4352 | ||
cec5225b | 4353 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
a06ea964 | 4354 | |
cec5225b | 4355 | bfd_put_NN (output_bfd, rela.r_addend, |
a06ea964 NC |
4356 | globals->root.sgot->contents + off); |
4357 | } | |
4358 | else | |
cec5225b | 4359 | bfd_put_NN (output_bfd, relocation - tpoff_base (info), |
a06ea964 NC |
4360 | globals->root.sgot->contents + off); |
4361 | ||
4362 | symbol_got_offset_mark (input_bfd, h, r_symndx); | |
4363 | } | |
4364 | break; | |
4365 | ||
a6bb11b2 YZ |
4366 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
4367 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: | |
4368 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
4369 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
4370 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: | |
4371 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
4372 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: | |
4373 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
a06ea964 NC |
4374 | break; |
4375 | ||
7bcccb57 | 4376 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
a6bb11b2 YZ |
4377 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
4378 | case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: | |
a06ea964 NC |
4379 | if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx)) |
4380 | { | |
4381 | bfd_boolean need_relocs = FALSE; | |
4382 | int indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
4383 | bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx); | |
4384 | ||
4385 | need_relocs = (h == NULL | |
4386 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
4387 | || h->root.type != bfd_link_hash_undefweak); | |
4388 | ||
4389 | BFD_ASSERT (globals->root.srelgot != NULL); | |
4390 | BFD_ASSERT (globals->root.sgot != NULL); | |
4391 | ||
4392 | if (need_relocs) | |
4393 | { | |
4394 | bfd_byte *loc; | |
4395 | Elf_Internal_Rela rela; | |
a6bb11b2 YZ |
4396 | rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC)); |
4397 | ||
a06ea964 NC |
4398 | rela.r_addend = 0; |
4399 | rela.r_offset = (globals->root.sgotplt->output_section->vma | |
4400 | + globals->root.sgotplt->output_offset | |
4401 | + off + globals->sgotplt_jump_table_size); | |
4402 | ||
4403 | if (indx == 0) | |
4404 | rela.r_addend = relocation - dtpoff_base (info); | |
4405 | ||
4406 | /* Allocate the next available slot in the PLT reloc | |
4407 | section to hold our R_AARCH64_TLSDESC, the next | |
4408 | available slot is determined from reloc_count, | |
4409 | which we step. But note, reloc_count was | |
4410 | artifically moved down while allocating slots for | |
4411 | real PLT relocs such that all of the PLT relocs | |
4412 | will fit above the initial reloc_count and the | |
4413 | extra stuff will fit below. */ | |
4414 | loc = globals->root.srelplt->contents; | |
4415 | loc += globals->root.srelplt->reloc_count++ | |
4416 | * RELOC_SIZE (globals); | |
4417 | ||
cec5225b | 4418 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
a06ea964 | 4419 | |
cec5225b | 4420 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
a06ea964 NC |
4421 | globals->root.sgotplt->contents + off + |
4422 | globals->sgotplt_jump_table_size); | |
cec5225b | 4423 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
a06ea964 NC |
4424 | globals->root.sgotplt->contents + off + |
4425 | globals->sgotplt_jump_table_size + | |
4426 | GOT_ENTRY_SIZE); | |
4427 | } | |
4428 | ||
4429 | symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx); | |
4430 | } | |
4431 | break; | |
a6bb11b2 YZ |
4432 | default: |
4433 | break; | |
a06ea964 NC |
4434 | } |
4435 | ||
4436 | if (!save_addend) | |
4437 | addend = 0; | |
4438 | ||
4439 | ||
4440 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections | |
4441 | because such sections are not SEC_ALLOC and thus ld.so will | |
4442 | not process them. */ | |
4443 | if (unresolved_reloc | |
4444 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
4445 | && h->def_dynamic) | |
4446 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4447 | +rel->r_offset) != (bfd_vma) - 1) | |
4448 | { | |
4449 | (*_bfd_error_handler) | |
4450 | (_ | |
4451 | ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
4452 | input_bfd, input_section, (long) rel->r_offset, howto->name, | |
4453 | h->root.root.string); | |
4454 | return FALSE; | |
4455 | } | |
4456 | ||
4457 | if (r != bfd_reloc_ok && r != bfd_reloc_continue) | |
4458 | { | |
4459 | switch (r) | |
4460 | { | |
4461 | case bfd_reloc_overflow: | |
4462 | /* If the overflowing reloc was to an undefined symbol, | |
4463 | we have already printed one error message and there | |
4464 | is no point complaining again. */ | |
4465 | if ((!h || | |
4466 | h->root.type != bfd_link_hash_undefined) | |
4467 | && (!((*info->callbacks->reloc_overflow) | |
4468 | (info, (h ? &h->root : NULL), name, howto->name, | |
4469 | (bfd_vma) 0, input_bfd, input_section, | |
4470 | rel->r_offset)))) | |
4471 | return FALSE; | |
4472 | break; | |
4473 | ||
4474 | case bfd_reloc_undefined: | |
4475 | if (!((*info->callbacks->undefined_symbol) | |
4476 | (info, name, input_bfd, input_section, | |
4477 | rel->r_offset, TRUE))) | |
4478 | return FALSE; | |
4479 | break; | |
4480 | ||
4481 | case bfd_reloc_outofrange: | |
4482 | error_message = _("out of range"); | |
4483 | goto common_error; | |
4484 | ||
4485 | case bfd_reloc_notsupported: | |
4486 | error_message = _("unsupported relocation"); | |
4487 | goto common_error; | |
4488 | ||
4489 | case bfd_reloc_dangerous: | |
4490 | /* error_message should already be set. */ | |
4491 | goto common_error; | |
4492 | ||
4493 | default: | |
4494 | error_message = _("unknown error"); | |
4495 | /* Fall through. */ | |
4496 | ||
4497 | common_error: | |
4498 | BFD_ASSERT (error_message != NULL); | |
4499 | if (!((*info->callbacks->reloc_dangerous) | |
4500 | (info, error_message, input_bfd, input_section, | |
4501 | rel->r_offset))) | |
4502 | return FALSE; | |
4503 | break; | |
4504 | } | |
4505 | } | |
4506 | } | |
4507 | ||
4508 | return TRUE; | |
4509 | } | |
4510 | ||
4511 | /* Set the right machine number. */ | |
4512 | ||
4513 | static bfd_boolean | |
cec5225b | 4514 | elfNN_aarch64_object_p (bfd *abfd) |
a06ea964 | 4515 | { |
cec5225b YZ |
4516 | #if ARCH_SIZE == 32 |
4517 | bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32); | |
4518 | #else | |
a06ea964 | 4519 | bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64); |
cec5225b | 4520 | #endif |
a06ea964 NC |
4521 | return TRUE; |
4522 | } | |
4523 | ||
4524 | /* Function to keep AArch64 specific flags in the ELF header. */ | |
4525 | ||
4526 | static bfd_boolean | |
cec5225b | 4527 | elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags) |
a06ea964 NC |
4528 | { |
4529 | if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags) | |
4530 | { | |
4531 | } | |
4532 | else | |
4533 | { | |
4534 | elf_elfheader (abfd)->e_flags = flags; | |
4535 | elf_flags_init (abfd) = TRUE; | |
4536 | } | |
4537 | ||
4538 | return TRUE; | |
4539 | } | |
4540 | ||
4541 | /* Copy backend specific data from one object module to another. */ | |
4542 | ||
4543 | static bfd_boolean | |
cec5225b | 4544 | elfNN_aarch64_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
a06ea964 NC |
4545 | { |
4546 | flagword in_flags; | |
4547 | ||
4548 | if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd)) | |
4549 | return TRUE; | |
4550 | ||
4551 | in_flags = elf_elfheader (ibfd)->e_flags; | |
4552 | ||
4553 | elf_elfheader (obfd)->e_flags = in_flags; | |
4554 | elf_flags_init (obfd) = TRUE; | |
4555 | ||
4556 | /* Also copy the EI_OSABI field. */ | |
4557 | elf_elfheader (obfd)->e_ident[EI_OSABI] = | |
4558 | elf_elfheader (ibfd)->e_ident[EI_OSABI]; | |
4559 | ||
4560 | /* Copy object attributes. */ | |
4561 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
4562 | ||
4563 | return TRUE; | |
4564 | } | |
4565 | ||
4566 | /* Merge backend specific data from an object file to the output | |
4567 | object file when linking. */ | |
4568 | ||
4569 | static bfd_boolean | |
cec5225b | 4570 | elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
a06ea964 NC |
4571 | { |
4572 | flagword out_flags; | |
4573 | flagword in_flags; | |
4574 | bfd_boolean flags_compatible = TRUE; | |
4575 | asection *sec; | |
4576 | ||
4577 | /* Check if we have the same endianess. */ | |
4578 | if (!_bfd_generic_verify_endian_match (ibfd, obfd)) | |
4579 | return FALSE; | |
4580 | ||
4581 | if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd)) | |
4582 | return TRUE; | |
4583 | ||
4584 | /* The input BFD must have had its flags initialised. */ | |
4585 | /* The following seems bogus to me -- The flags are initialized in | |
4586 | the assembler but I don't think an elf_flags_init field is | |
4587 | written into the object. */ | |
4588 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ | |
4589 | ||
4590 | in_flags = elf_elfheader (ibfd)->e_flags; | |
4591 | out_flags = elf_elfheader (obfd)->e_flags; | |
4592 | ||
4593 | if (!elf_flags_init (obfd)) | |
4594 | { | |
4595 | /* If the input is the default architecture and had the default | |
4596 | flags then do not bother setting the flags for the output | |
4597 | architecture, instead allow future merges to do this. If no | |
4598 | future merges ever set these flags then they will retain their | |
4599 | uninitialised values, which surprise surprise, correspond | |
4600 | to the default values. */ | |
4601 | if (bfd_get_arch_info (ibfd)->the_default | |
4602 | && elf_elfheader (ibfd)->e_flags == 0) | |
4603 | return TRUE; | |
4604 | ||
4605 | elf_flags_init (obfd) = TRUE; | |
4606 | elf_elfheader (obfd)->e_flags = in_flags; | |
4607 | ||
4608 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
4609 | && bfd_get_arch_info (obfd)->the_default) | |
4610 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
4611 | bfd_get_mach (ibfd)); | |
4612 | ||
4613 | return TRUE; | |
4614 | } | |
4615 | ||
4616 | /* Identical flags must be compatible. */ | |
4617 | if (in_flags == out_flags) | |
4618 | return TRUE; | |
4619 | ||
4620 | /* Check to see if the input BFD actually contains any sections. If | |
4621 | not, its flags may not have been initialised either, but it | |
4622 | cannot actually cause any incompatiblity. Do not short-circuit | |
4623 | dynamic objects; their section list may be emptied by | |
4624 | elf_link_add_object_symbols. | |
4625 | ||
4626 | Also check to see if there are no code sections in the input. | |
4627 | In this case there is no need to check for code specific flags. | |
4628 | XXX - do we need to worry about floating-point format compatability | |
4629 | in data sections ? */ | |
4630 | if (!(ibfd->flags & DYNAMIC)) | |
4631 | { | |
4632 | bfd_boolean null_input_bfd = TRUE; | |
4633 | bfd_boolean only_data_sections = TRUE; | |
4634 | ||
4635 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
4636 | { | |
4637 | if ((bfd_get_section_flags (ibfd, sec) | |
4638 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
4639 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
4640 | only_data_sections = FALSE; | |
4641 | ||
4642 | null_input_bfd = FALSE; | |
4643 | break; | |
4644 | } | |
4645 | ||
4646 | if (null_input_bfd || only_data_sections) | |
4647 | return TRUE; | |
4648 | } | |
4649 | ||
4650 | return flags_compatible; | |
4651 | } | |
4652 | ||
4653 | /* Display the flags field. */ | |
4654 | ||
4655 | static bfd_boolean | |
cec5225b | 4656 | elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr) |
a06ea964 NC |
4657 | { |
4658 | FILE *file = (FILE *) ptr; | |
4659 | unsigned long flags; | |
4660 | ||
4661 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
4662 | ||
4663 | /* Print normal ELF private data. */ | |
4664 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
4665 | ||
4666 | flags = elf_elfheader (abfd)->e_flags; | |
4667 | /* Ignore init flag - it may not be set, despite the flags field | |
4668 | containing valid data. */ | |
4669 | ||
4670 | /* xgettext:c-format */ | |
4671 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
4672 | ||
4673 | if (flags) | |
4674 | fprintf (file, _("<Unrecognised flag bits set>")); | |
4675 | ||
4676 | fputc ('\n', file); | |
4677 | ||
4678 | return TRUE; | |
4679 | } | |
4680 | ||
4681 | /* Update the got entry reference counts for the section being removed. */ | |
4682 | ||
4683 | static bfd_boolean | |
cec5225b | 4684 | elfNN_aarch64_gc_sweep_hook (bfd *abfd, |
cb8af559 NC |
4685 | struct bfd_link_info *info, |
4686 | asection *sec, | |
4687 | const Elf_Internal_Rela * relocs) | |
a06ea964 | 4688 | { |
cec5225b | 4689 | struct elf_aarch64_link_hash_table *htab; |
59c108f7 NC |
4690 | Elf_Internal_Shdr *symtab_hdr; |
4691 | struct elf_link_hash_entry **sym_hashes; | |
cb8af559 | 4692 | struct elf_aarch64_local_symbol *locals; |
59c108f7 NC |
4693 | const Elf_Internal_Rela *rel, *relend; |
4694 | ||
4695 | if (info->relocatable) | |
4696 | return TRUE; | |
4697 | ||
cec5225b | 4698 | htab = elf_aarch64_hash_table (info); |
59c108f7 NC |
4699 | |
4700 | if (htab == NULL) | |
4701 | return FALSE; | |
4702 | ||
4703 | elf_section_data (sec)->local_dynrel = NULL; | |
4704 | ||
4705 | symtab_hdr = &elf_symtab_hdr (abfd); | |
4706 | sym_hashes = elf_sym_hashes (abfd); | |
4707 | ||
cec5225b | 4708 | locals = elf_aarch64_locals (abfd); |
59c108f7 NC |
4709 | |
4710 | relend = relocs + sec->reloc_count; | |
4711 | for (rel = relocs; rel < relend; rel++) | |
4712 | { | |
4713 | unsigned long r_symndx; | |
4714 | unsigned int r_type; | |
4715 | struct elf_link_hash_entry *h = NULL; | |
4716 | ||
cec5225b | 4717 | r_symndx = ELFNN_R_SYM (rel->r_info); |
8847944f | 4718 | |
59c108f7 NC |
4719 | if (r_symndx >= symtab_hdr->sh_info) |
4720 | { | |
8847944f | 4721 | |
59c108f7 NC |
4722 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
4723 | while (h->root.type == bfd_link_hash_indirect | |
4724 | || h->root.type == bfd_link_hash_warning) | |
4725 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
59c108f7 NC |
4726 | } |
4727 | else | |
4728 | { | |
4729 | Elf_Internal_Sym *isym; | |
4730 | ||
8847944f | 4731 | /* A local symbol. */ |
59c108f7 NC |
4732 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
4733 | abfd, r_symndx); | |
1419bbe5 WN |
4734 | |
4735 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
4736 | if (isym != NULL | |
4737 | && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
4738 | { | |
4739 | h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, FALSE); | |
4740 | if (h == NULL) | |
4741 | abort (); | |
4742 | } | |
4743 | } | |
4744 | ||
4745 | if (h) | |
4746 | { | |
4747 | struct elf_aarch64_link_hash_entry *eh; | |
4748 | struct elf_dyn_relocs **pp; | |
4749 | struct elf_dyn_relocs *p; | |
4750 | ||
4751 | eh = (struct elf_aarch64_link_hash_entry *) h; | |
4752 | ||
4753 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
4754 | if (p->sec == sec) | |
4755 | { | |
4756 | /* Everything must go for SEC. */ | |
4757 | *pp = p->next; | |
4758 | break; | |
4759 | } | |
59c108f7 NC |
4760 | } |
4761 | ||
cec5225b | 4762 | r_type = ELFNN_R_TYPE (rel->r_info); |
a6bb11b2 | 4763 | switch (aarch64_tls_transition (abfd,info, r_type, h ,r_symndx)) |
59c108f7 | 4764 | { |
a6bb11b2 | 4765 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
7bcccb57 MS |
4766 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
4767 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: | |
4768 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
4769 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: | |
4770 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
4771 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: | |
4772 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: | |
a6bb11b2 | 4773 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
7bcccb57 | 4774 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
a6bb11b2 | 4775 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
a6bb11b2 | 4776 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
7bcccb57 | 4777 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
a6bb11b2 | 4778 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
7bcccb57 | 4779 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
a6bb11b2 | 4780 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
a6bb11b2 YZ |
4781 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
4782 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
7bcccb57 MS |
4783 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
4784 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
4785 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
a6bb11b2 | 4786 | if (h != NULL) |
59c108f7 NC |
4787 | { |
4788 | if (h->got.refcount > 0) | |
4789 | h->got.refcount -= 1; | |
1419bbe5 WN |
4790 | |
4791 | if (h->type == STT_GNU_IFUNC) | |
4792 | { | |
4793 | if (h->plt.refcount > 0) | |
4794 | h->plt.refcount -= 1; | |
4795 | } | |
59c108f7 | 4796 | } |
cb8af559 | 4797 | else if (locals != NULL) |
59c108f7 | 4798 | { |
cb8af559 NC |
4799 | if (locals[r_symndx].got_refcount > 0) |
4800 | locals[r_symndx].got_refcount -= 1; | |
59c108f7 NC |
4801 | } |
4802 | break; | |
4803 | ||
a6bb11b2 YZ |
4804 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: |
4805 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: | |
4806 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: | |
59c108f7 NC |
4807 | if (h != NULL && info->executable) |
4808 | { | |
4809 | if (h->plt.refcount > 0) | |
4810 | h->plt.refcount -= 1; | |
4811 | } | |
4812 | break; | |
4813 | ||
a6bb11b2 YZ |
4814 | case BFD_RELOC_AARCH64_CALL26: |
4815 | case BFD_RELOC_AARCH64_JUMP26: | |
4816 | /* If this is a local symbol then we resolve it | |
4817 | directly without creating a PLT entry. */ | |
59c108f7 NC |
4818 | if (h == NULL) |
4819 | continue; | |
4820 | ||
4821 | if (h->plt.refcount > 0) | |
4822 | h->plt.refcount -= 1; | |
4823 | break; | |
4824 | ||
a6bb11b2 | 4825 | case BFD_RELOC_AARCH64_NN: |
8847944f | 4826 | if (h != NULL && info->executable) |
59c108f7 NC |
4827 | { |
4828 | if (h->plt.refcount > 0) | |
4829 | h->plt.refcount -= 1; | |
4830 | } | |
4831 | break; | |
cec5225b | 4832 | |
59c108f7 NC |
4833 | default: |
4834 | break; | |
4835 | } | |
4836 | } | |
4837 | ||
a06ea964 NC |
4838 | return TRUE; |
4839 | } | |
4840 | ||
4841 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
4842 | regular object. The current definition is in some section of the | |
4843 | dynamic object, but we're not including those sections. We have to | |
4844 | change the definition to something the rest of the link can | |
4845 | understand. */ | |
4846 | ||
4847 | static bfd_boolean | |
cec5225b | 4848 | elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info, |
a06ea964 NC |
4849 | struct elf_link_hash_entry *h) |
4850 | { | |
cec5225b | 4851 | struct elf_aarch64_link_hash_table *htab; |
a06ea964 NC |
4852 | asection *s; |
4853 | ||
4854 | /* If this is a function, put it in the procedure linkage table. We | |
4855 | will fill in the contents of the procedure linkage table later, | |
4856 | when we know the address of the .got section. */ | |
1419bbe5 | 4857 | if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt) |
a06ea964 NC |
4858 | { |
4859 | if (h->plt.refcount <= 0 | |
1419bbe5 WN |
4860 | || (h->type != STT_GNU_IFUNC |
4861 | && (SYMBOL_CALLS_LOCAL (info, h) | |
4862 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
4863 | && h->root.type == bfd_link_hash_undefweak)))) | |
a06ea964 NC |
4864 | { |
4865 | /* This case can occur if we saw a CALL26 reloc in | |
4866 | an input file, but the symbol wasn't referred to | |
4867 | by a dynamic object or all references were | |
4868 | garbage collected. In which case we can end up | |
4869 | resolving. */ | |
4870 | h->plt.offset = (bfd_vma) - 1; | |
4871 | h->needs_plt = 0; | |
4872 | } | |
4873 | ||
4874 | return TRUE; | |
4875 | } | |
4876 | else | |
4877 | /* It's possible that we incorrectly decided a .plt reloc was | |
4878 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
4879 | check_relocs. We can't decide accurately between function and | |
4880 | non-function syms in check-relocs; Objects loaded later in | |
4881 | the link may change h->type. So fix it now. */ | |
4882 | h->plt.offset = (bfd_vma) - 1; | |
4883 | ||
4884 | ||
4885 | /* If this is a weak symbol, and there is a real definition, the | |
4886 | processor independent code will have arranged for us to see the | |
4887 | real definition first, and we can just use the same value. */ | |
4888 | if (h->u.weakdef != NULL) | |
4889 | { | |
4890 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined | |
4891 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
4892 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
4893 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
4894 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) | |
4895 | h->non_got_ref = h->u.weakdef->non_got_ref; | |
4896 | return TRUE; | |
4897 | } | |
4898 | ||
4899 | /* If we are creating a shared library, we must presume that the | |
4900 | only references to the symbol are via the global offset table. | |
4901 | For such cases we need not do anything here; the relocations will | |
4902 | be handled correctly by relocate_section. */ | |
4903 | if (info->shared) | |
4904 | return TRUE; | |
4905 | ||
4906 | /* If there are no references to this symbol that do not use the | |
4907 | GOT, we don't need to generate a copy reloc. */ | |
4908 | if (!h->non_got_ref) | |
4909 | return TRUE; | |
4910 | ||
4911 | /* If -z nocopyreloc was given, we won't generate them either. */ | |
4912 | if (info->nocopyreloc) | |
4913 | { | |
4914 | h->non_got_ref = 0; | |
4915 | return TRUE; | |
4916 | } | |
4917 | ||
4918 | /* We must allocate the symbol in our .dynbss section, which will | |
4919 | become part of the .bss section of the executable. There will be | |
4920 | an entry for this symbol in the .dynsym section. The dynamic | |
4921 | object will contain position independent code, so all references | |
4922 | from the dynamic object to this symbol will go through the global | |
4923 | offset table. The dynamic linker will use the .dynsym entry to | |
4924 | determine the address it must put in the global offset table, so | |
4925 | both the dynamic object and the regular object will refer to the | |
4926 | same memory location for the variable. */ | |
4927 | ||
cec5225b | 4928 | htab = elf_aarch64_hash_table (info); |
a06ea964 NC |
4929 | |
4930 | /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker | |
4931 | to copy the initial value out of the dynamic object and into the | |
4932 | runtime process image. */ | |
4933 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) | |
4934 | { | |
4935 | htab->srelbss->size += RELOC_SIZE (htab); | |
4936 | h->needs_copy = 1; | |
4937 | } | |
4938 | ||
4939 | s = htab->sdynbss; | |
4940 | ||
4941 | return _bfd_elf_adjust_dynamic_copy (h, s); | |
4942 | ||
4943 | } | |
4944 | ||
4945 | static bfd_boolean | |
cec5225b | 4946 | elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number) |
a06ea964 NC |
4947 | { |
4948 | struct elf_aarch64_local_symbol *locals; | |
cec5225b | 4949 | locals = elf_aarch64_locals (abfd); |
a06ea964 NC |
4950 | if (locals == NULL) |
4951 | { | |
4952 | locals = (struct elf_aarch64_local_symbol *) | |
4953 | bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol)); | |
4954 | if (locals == NULL) | |
4955 | return FALSE; | |
cec5225b | 4956 | elf_aarch64_locals (abfd) = locals; |
a06ea964 NC |
4957 | } |
4958 | return TRUE; | |
4959 | } | |
4960 | ||
cc0efaa8 MS |
4961 | /* Create the .got section to hold the global offset table. */ |
4962 | ||
4963 | static bfd_boolean | |
4964 | aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) | |
4965 | { | |
4966 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
4967 | flagword flags; | |
4968 | asection *s; | |
4969 | struct elf_link_hash_entry *h; | |
4970 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
4971 | ||
4972 | /* This function may be called more than once. */ | |
4973 | s = bfd_get_linker_section (abfd, ".got"); | |
4974 | if (s != NULL) | |
4975 | return TRUE; | |
4976 | ||
4977 | flags = bed->dynamic_sec_flags; | |
4978 | ||
4979 | s = bfd_make_section_anyway_with_flags (abfd, | |
4980 | (bed->rela_plts_and_copies_p | |
4981 | ? ".rela.got" : ".rel.got"), | |
4982 | (bed->dynamic_sec_flags | |
4983 | | SEC_READONLY)); | |
4984 | if (s == NULL | |
4985 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
4986 | return FALSE; | |
4987 | htab->srelgot = s; | |
4988 | ||
4989 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); | |
4990 | if (s == NULL | |
4991 | || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
4992 | return FALSE; | |
4993 | htab->sgot = s; | |
4994 | htab->sgot->size += GOT_ENTRY_SIZE; | |
4995 | ||
4996 | if (bed->want_got_sym) | |
4997 | { | |
4998 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
4999 | (or .got.plt) section. We don't do this in the linker script | |
5000 | because we don't want to define the symbol if we are not creating | |
5001 | a global offset table. */ | |
5002 | h = _bfd_elf_define_linkage_sym (abfd, info, s, | |
5003 | "_GLOBAL_OFFSET_TABLE_"); | |
5004 | elf_hash_table (info)->hgot = h; | |
5005 | if (h == NULL) | |
5006 | return FALSE; | |
5007 | } | |
5008 | ||
5009 | if (bed->want_got_plt) | |
5010 | { | |
5011 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); | |
5012 | if (s == NULL | |
5013 | || !bfd_set_section_alignment (abfd, s, | |
5014 | bed->s->log_file_align)) | |
5015 | return FALSE; | |
5016 | htab->sgotplt = s; | |
5017 | } | |
5018 | ||
5019 | /* The first bit of the global offset table is the header. */ | |
5020 | s->size += bed->got_header_size; | |
5021 | ||
5022 | return TRUE; | |
5023 | } | |
5024 | ||
a06ea964 NC |
5025 | /* Look through the relocs for a section during the first phase. */ |
5026 | ||
5027 | static bfd_boolean | |
cec5225b | 5028 | elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
a06ea964 NC |
5029 | asection *sec, const Elf_Internal_Rela *relocs) |
5030 | { | |
5031 | Elf_Internal_Shdr *symtab_hdr; | |
5032 | struct elf_link_hash_entry **sym_hashes; | |
5033 | const Elf_Internal_Rela *rel; | |
5034 | const Elf_Internal_Rela *rel_end; | |
5035 | asection *sreloc; | |
5036 | ||
cec5225b | 5037 | struct elf_aarch64_link_hash_table *htab; |
a06ea964 | 5038 | |
a06ea964 NC |
5039 | if (info->relocatable) |
5040 | return TRUE; | |
5041 | ||
5042 | BFD_ASSERT (is_aarch64_elf (abfd)); | |
5043 | ||
cec5225b | 5044 | htab = elf_aarch64_hash_table (info); |
a06ea964 NC |
5045 | sreloc = NULL; |
5046 | ||
5047 | symtab_hdr = &elf_symtab_hdr (abfd); | |
5048 | sym_hashes = elf_sym_hashes (abfd); | |
a06ea964 NC |
5049 | |
5050 | rel_end = relocs + sec->reloc_count; | |
5051 | for (rel = relocs; rel < rel_end; rel++) | |
5052 | { | |
5053 | struct elf_link_hash_entry *h; | |
5054 | unsigned long r_symndx; | |
5055 | unsigned int r_type; | |
a6bb11b2 | 5056 | bfd_reloc_code_real_type bfd_r_type; |
1419bbe5 | 5057 | Elf_Internal_Sym *isym; |
a06ea964 | 5058 | |
cec5225b YZ |
5059 | r_symndx = ELFNN_R_SYM (rel->r_info); |
5060 | r_type = ELFNN_R_TYPE (rel->r_info); | |
a06ea964 NC |
5061 | |
5062 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
5063 | { | |
5064 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd, | |
5065 | r_symndx); | |
5066 | return FALSE; | |
5067 | } | |
5068 | ||
ed5acf27 | 5069 | if (r_symndx < symtab_hdr->sh_info) |
1419bbe5 WN |
5070 | { |
5071 | /* A local symbol. */ | |
5072 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
5073 | abfd, r_symndx); | |
5074 | if (isym == NULL) | |
5075 | return FALSE; | |
5076 | ||
5077 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
5078 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
5079 | { | |
5080 | h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, | |
5081 | TRUE); | |
5082 | if (h == NULL) | |
5083 | return FALSE; | |
5084 | ||
5085 | /* Fake a STT_GNU_IFUNC symbol. */ | |
5086 | h->type = STT_GNU_IFUNC; | |
5087 | h->def_regular = 1; | |
5088 | h->ref_regular = 1; | |
5089 | h->forced_local = 1; | |
5090 | h->root.type = bfd_link_hash_defined; | |
5091 | } | |
5092 | else | |
5093 | h = NULL; | |
5094 | } | |
a06ea964 NC |
5095 | else |
5096 | { | |
5097 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
5098 | while (h->root.type == bfd_link_hash_indirect | |
5099 | || h->root.type == bfd_link_hash_warning) | |
5100 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
81fbe831 AM |
5101 | |
5102 | /* PR15323, ref flags aren't set for references in the same | |
5103 | object. */ | |
5104 | h->root.non_ir_ref = 1; | |
a06ea964 NC |
5105 | } |
5106 | ||
5107 | /* Could be done earlier, if h were already available. */ | |
a6bb11b2 | 5108 | bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx); |
a06ea964 | 5109 | |
1419bbe5 WN |
5110 | if (h != NULL) |
5111 | { | |
5112 | /* Create the ifunc sections for static executables. If we | |
5113 | never see an indirect function symbol nor we are building | |
5114 | a static executable, those sections will be empty and | |
5115 | won't appear in output. */ | |
5116 | switch (bfd_r_type) | |
5117 | { | |
5118 | default: | |
5119 | break; | |
5120 | ||
5121 | case BFD_RELOC_AARCH64_NN: | |
5122 | case BFD_RELOC_AARCH64_CALL26: | |
5123 | case BFD_RELOC_AARCH64_JUMP26: | |
5124 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: | |
5125 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
5126 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: | |
5127 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: | |
5128 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: | |
5129 | case BFD_RELOC_AARCH64_ADD_LO12: | |
5130 | if (htab->root.dynobj == NULL) | |
5131 | htab->root.dynobj = abfd; | |
5132 | if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info)) | |
5133 | return FALSE; | |
5134 | break; | |
5135 | } | |
5136 | ||
5137 | /* It is referenced by a non-shared object. */ | |
5138 | h->ref_regular = 1; | |
5139 | h->root.non_ir_ref = 1; | |
5140 | } | |
5141 | ||
a6bb11b2 | 5142 | switch (bfd_r_type) |
a06ea964 | 5143 | { |
a6bb11b2 | 5144 | case BFD_RELOC_AARCH64_NN: |
a06ea964 NC |
5145 | |
5146 | /* We don't need to handle relocs into sections not going into | |
5147 | the "real" output. */ | |
5148 | if ((sec->flags & SEC_ALLOC) == 0) | |
5149 | break; | |
5150 | ||
5151 | if (h != NULL) | |
5152 | { | |
5153 | if (!info->shared) | |
5154 | h->non_got_ref = 1; | |
5155 | ||
5156 | h->plt.refcount += 1; | |
5157 | h->pointer_equality_needed = 1; | |
5158 | } | |
5159 | ||
5160 | /* No need to do anything if we're not creating a shared | |
5161 | object. */ | |
5162 | if (! info->shared) | |
5163 | break; | |
5164 | ||
5165 | { | |
5166 | struct elf_dyn_relocs *p; | |
5167 | struct elf_dyn_relocs **head; | |
5168 | ||
5169 | /* We must copy these reloc types into the output file. | |
5170 | Create a reloc section in dynobj and make room for | |
5171 | this reloc. */ | |
5172 | if (sreloc == NULL) | |
5173 | { | |
5174 | if (htab->root.dynobj == NULL) | |
5175 | htab->root.dynobj = abfd; | |
5176 | ||
5177 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
0608afa7 | 5178 | (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE); |
a06ea964 NC |
5179 | |
5180 | if (sreloc == NULL) | |
5181 | return FALSE; | |
5182 | } | |
5183 | ||
5184 | /* If this is a global symbol, we count the number of | |
5185 | relocations we need for this symbol. */ | |
5186 | if (h != NULL) | |
5187 | { | |
cec5225b YZ |
5188 | struct elf_aarch64_link_hash_entry *eh; |
5189 | eh = (struct elf_aarch64_link_hash_entry *) h; | |
a06ea964 NC |
5190 | head = &eh->dyn_relocs; |
5191 | } | |
5192 | else | |
5193 | { | |
5194 | /* Track dynamic relocs needed for local syms too. | |
5195 | We really need local syms available to do this | |
5196 | easily. Oh well. */ | |
5197 | ||
5198 | asection *s; | |
5199 | void **vpp; | |
a06ea964 NC |
5200 | |
5201 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
5202 | abfd, r_symndx); | |
5203 | if (isym == NULL) | |
5204 | return FALSE; | |
5205 | ||
5206 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
5207 | if (s == NULL) | |
5208 | s = sec; | |
5209 | ||
5210 | /* Beware of type punned pointers vs strict aliasing | |
5211 | rules. */ | |
5212 | vpp = &(elf_section_data (s)->local_dynrel); | |
5213 | head = (struct elf_dyn_relocs **) vpp; | |
5214 | } | |
5215 | ||
5216 | p = *head; | |
5217 | if (p == NULL || p->sec != sec) | |
5218 | { | |
5219 | bfd_size_type amt = sizeof *p; | |
5220 | p = ((struct elf_dyn_relocs *) | |
5221 | bfd_zalloc (htab->root.dynobj, amt)); | |
5222 | if (p == NULL) | |
5223 | return FALSE; | |
5224 | p->next = *head; | |
5225 | *head = p; | |
5226 | p->sec = sec; | |
5227 | } | |
5228 | ||
5229 | p->count += 1; | |
5230 | ||
5231 | } | |
5232 | break; | |
5233 | ||
5234 | /* RR: We probably want to keep a consistency check that | |
5235 | there are no dangling GOT_PAGE relocs. */ | |
a6bb11b2 | 5236 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
7bcccb57 MS |
5237 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
5238 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: | |
5239 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
5240 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: | |
5241 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
5242 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: | |
5243 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: | |
a6bb11b2 | 5244 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
7bcccb57 | 5245 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
a6bb11b2 | 5246 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
a6bb11b2 | 5247 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
7bcccb57 | 5248 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
a6bb11b2 | 5249 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
7bcccb57 | 5250 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
a6bb11b2 | 5251 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
a6bb11b2 YZ |
5252 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
5253 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
7bcccb57 MS |
5254 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
5255 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
5256 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
a06ea964 NC |
5257 | { |
5258 | unsigned got_type; | |
5259 | unsigned old_got_type; | |
5260 | ||
a6bb11b2 | 5261 | got_type = aarch64_reloc_got_type (bfd_r_type); |
a06ea964 NC |
5262 | |
5263 | if (h) | |
5264 | { | |
5265 | h->got.refcount += 1; | |
cec5225b | 5266 | old_got_type = elf_aarch64_hash_entry (h)->got_type; |
a06ea964 NC |
5267 | } |
5268 | else | |
5269 | { | |
5270 | struct elf_aarch64_local_symbol *locals; | |
5271 | ||
cec5225b | 5272 | if (!elfNN_aarch64_allocate_local_symbols |
a06ea964 NC |
5273 | (abfd, symtab_hdr->sh_info)) |
5274 | return FALSE; | |
5275 | ||
cec5225b | 5276 | locals = elf_aarch64_locals (abfd); |
a06ea964 NC |
5277 | BFD_ASSERT (r_symndx < symtab_hdr->sh_info); |
5278 | locals[r_symndx].got_refcount += 1; | |
5279 | old_got_type = locals[r_symndx].got_type; | |
5280 | } | |
5281 | ||
5282 | /* If a variable is accessed with both general dynamic TLS | |
5283 | methods, two slots may be created. */ | |
5284 | if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type)) | |
5285 | got_type |= old_got_type; | |
5286 | ||
5287 | /* We will already have issued an error message if there | |
5288 | is a TLS/non-TLS mismatch, based on the symbol type. | |
5289 | So just combine any TLS types needed. */ | |
5290 | if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL | |
5291 | && got_type != GOT_NORMAL) | |
5292 | got_type |= old_got_type; | |
5293 | ||
5294 | /* If the symbol is accessed by both IE and GD methods, we | |
5295 | are able to relax. Turn off the GD flag, without | |
5296 | messing up with any other kind of TLS types that may be | |
5297 | involved. */ | |
5298 | if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type)) | |
5299 | got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD); | |
5300 | ||
5301 | if (old_got_type != got_type) | |
5302 | { | |
5303 | if (h != NULL) | |
cec5225b | 5304 | elf_aarch64_hash_entry (h)->got_type = got_type; |
a06ea964 NC |
5305 | else |
5306 | { | |
5307 | struct elf_aarch64_local_symbol *locals; | |
cec5225b | 5308 | locals = elf_aarch64_locals (abfd); |
a06ea964 NC |
5309 | BFD_ASSERT (r_symndx < symtab_hdr->sh_info); |
5310 | locals[r_symndx].got_type = got_type; | |
5311 | } | |
5312 | } | |
5313 | ||
cc0efaa8 MS |
5314 | if (htab->root.dynobj == NULL) |
5315 | htab->root.dynobj = abfd; | |
5316 | if (! aarch64_elf_create_got_section (htab->root.dynobj, info)) | |
5317 | return FALSE; | |
a06ea964 NC |
5318 | break; |
5319 | } | |
5320 | ||
a6bb11b2 YZ |
5321 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: |
5322 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: | |
5323 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: | |
a06ea964 NC |
5324 | if (h != NULL && info->executable) |
5325 | { | |
5326 | /* If this reloc is in a read-only section, we might | |
5327 | need a copy reloc. We can't check reliably at this | |
5328 | stage whether the section is read-only, as input | |
5329 | sections have not yet been mapped to output sections. | |
5330 | Tentatively set the flag for now, and correct in | |
5331 | adjust_dynamic_symbol. */ | |
5332 | h->non_got_ref = 1; | |
5333 | h->plt.refcount += 1; | |
5334 | h->pointer_equality_needed = 1; | |
5335 | } | |
5336 | /* FIXME:: RR need to handle these in shared libraries | |
5337 | and essentially bomb out as these being non-PIC | |
5338 | relocations in shared libraries. */ | |
5339 | break; | |
5340 | ||
a6bb11b2 YZ |
5341 | case BFD_RELOC_AARCH64_CALL26: |
5342 | case BFD_RELOC_AARCH64_JUMP26: | |
a06ea964 NC |
5343 | /* If this is a local symbol then we resolve it |
5344 | directly without creating a PLT entry. */ | |
5345 | if (h == NULL) | |
5346 | continue; | |
5347 | ||
5348 | h->needs_plt = 1; | |
1419bbe5 WN |
5349 | if (h->plt.refcount <= 0) |
5350 | h->plt.refcount = 1; | |
5351 | else | |
5352 | h->plt.refcount += 1; | |
a06ea964 | 5353 | break; |
a6bb11b2 YZ |
5354 | |
5355 | default: | |
5356 | break; | |
a06ea964 NC |
5357 | } |
5358 | } | |
a6bb11b2 | 5359 | |
a06ea964 NC |
5360 | return TRUE; |
5361 | } | |
5362 | ||
5363 | /* Treat mapping symbols as special target symbols. */ | |
5364 | ||
5365 | static bfd_boolean | |
cec5225b | 5366 | elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED, |
a06ea964 NC |
5367 | asymbol *sym) |
5368 | { | |
5369 | return bfd_is_aarch64_special_symbol_name (sym->name, | |
5370 | BFD_AARCH64_SPECIAL_SYM_TYPE_ANY); | |
5371 | } | |
5372 | ||
5373 | /* This is a copy of elf_find_function () from elf.c except that | |
5374 | AArch64 mapping symbols are ignored when looking for function names. */ | |
5375 | ||
5376 | static bfd_boolean | |
5377 | aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED, | |
5378 | asection *section, | |
5379 | asymbol **symbols, | |
5380 | bfd_vma offset, | |
5381 | const char **filename_ptr, | |
5382 | const char **functionname_ptr) | |
5383 | { | |
5384 | const char *filename = NULL; | |
5385 | asymbol *func = NULL; | |
5386 | bfd_vma low_func = 0; | |
5387 | asymbol **p; | |
5388 | ||
5389 | for (p = symbols; *p != NULL; p++) | |
5390 | { | |
5391 | elf_symbol_type *q; | |
5392 | ||
5393 | q = (elf_symbol_type *) * p; | |
5394 | ||
5395 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) | |
5396 | { | |
5397 | default: | |
5398 | break; | |
5399 | case STT_FILE: | |
5400 | filename = bfd_asymbol_name (&q->symbol); | |
5401 | break; | |
5402 | case STT_FUNC: | |
5403 | case STT_NOTYPE: | |
5404 | /* Skip mapping symbols. */ | |
5405 | if ((q->symbol.flags & BSF_LOCAL) | |
5406 | && (bfd_is_aarch64_special_symbol_name | |
5407 | (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY))) | |
5408 | continue; | |
5409 | /* Fall through. */ | |
5410 | if (bfd_get_section (&q->symbol) == section | |
5411 | && q->symbol.value >= low_func && q->symbol.value <= offset) | |
5412 | { | |
5413 | func = (asymbol *) q; | |
5414 | low_func = q->symbol.value; | |
5415 | } | |
5416 | break; | |
5417 | } | |
5418 | } | |
5419 | ||
5420 | if (func == NULL) | |
5421 | return FALSE; | |
5422 | ||
5423 | if (filename_ptr) | |
5424 | *filename_ptr = filename; | |
5425 | if (functionname_ptr) | |
5426 | *functionname_ptr = bfd_asymbol_name (func); | |
5427 | ||
5428 | return TRUE; | |
5429 | } | |
5430 | ||
5431 | ||
5432 | /* Find the nearest line to a particular section and offset, for error | |
5433 | reporting. This code is a duplicate of the code in elf.c, except | |
5434 | that it uses aarch64_elf_find_function. */ | |
5435 | ||
5436 | static bfd_boolean | |
cec5225b | 5437 | elfNN_aarch64_find_nearest_line (bfd *abfd, |
a06ea964 NC |
5438 | asection *section, |
5439 | asymbol **symbols, | |
5440 | bfd_vma offset, | |
5441 | const char **filename_ptr, | |
5442 | const char **functionname_ptr, | |
5443 | unsigned int *line_ptr) | |
5444 | { | |
5445 | bfd_boolean found = FALSE; | |
5446 | ||
5447 | /* We skip _bfd_dwarf1_find_nearest_line since no known AArch64 | |
5448 | toolchain uses it. */ | |
5449 | ||
5450 | if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections, | |
5451 | section, symbols, offset, | |
5452 | filename_ptr, functionname_ptr, | |
5453 | line_ptr, NULL, 0, | |
5454 | &elf_tdata (abfd)->dwarf2_find_line_info)) | |
5455 | { | |
5456 | if (!*functionname_ptr) | |
5457 | aarch64_elf_find_function (abfd, section, symbols, offset, | |
5458 | *filename_ptr ? NULL : filename_ptr, | |
5459 | functionname_ptr); | |
5460 | ||
5461 | return TRUE; | |
5462 | } | |
5463 | ||
5464 | if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, | |
5465 | &found, filename_ptr, | |
5466 | functionname_ptr, line_ptr, | |
5467 | &elf_tdata (abfd)->line_info)) | |
5468 | return FALSE; | |
5469 | ||
5470 | if (found && (*functionname_ptr || *line_ptr)) | |
5471 | return TRUE; | |
5472 | ||
5473 | if (symbols == NULL) | |
5474 | return FALSE; | |
5475 | ||
5476 | if (!aarch64_elf_find_function (abfd, section, symbols, offset, | |
5477 | filename_ptr, functionname_ptr)) | |
5478 | return FALSE; | |
5479 | ||
5480 | *line_ptr = 0; | |
5481 | return TRUE; | |
5482 | } | |
5483 | ||
5484 | static bfd_boolean | |
cec5225b | 5485 | elfNN_aarch64_find_inliner_info (bfd *abfd, |
a06ea964 NC |
5486 | const char **filename_ptr, |
5487 | const char **functionname_ptr, | |
5488 | unsigned int *line_ptr) | |
5489 | { | |
5490 | bfd_boolean found; | |
5491 | found = _bfd_dwarf2_find_inliner_info | |
5492 | (abfd, filename_ptr, | |
5493 | functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info); | |
5494 | return found; | |
5495 | } | |
5496 | ||
5497 | ||
5498 | static void | |
cec5225b | 5499 | elfNN_aarch64_post_process_headers (bfd *abfd, |
1419bbe5 | 5500 | struct bfd_link_info *link_info) |
a06ea964 NC |
5501 | { |
5502 | Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */ | |
5503 | ||
5504 | i_ehdrp = elf_elfheader (abfd); | |
a06ea964 | 5505 | i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION; |
1419bbe5 WN |
5506 | |
5507 | _bfd_elf_set_osabi (abfd, link_info); | |
a06ea964 NC |
5508 | } |
5509 | ||
5510 | static enum elf_reloc_type_class | |
cec5225b | 5511 | elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
7e612e98 AM |
5512 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5513 | const Elf_Internal_Rela *rela) | |
a06ea964 | 5514 | { |
cec5225b | 5515 | switch ((int) ELFNN_R_TYPE (rela->r_info)) |
a06ea964 | 5516 | { |
a6bb11b2 | 5517 | case AARCH64_R (RELATIVE): |
a06ea964 | 5518 | return reloc_class_relative; |
a6bb11b2 | 5519 | case AARCH64_R (JUMP_SLOT): |
a06ea964 | 5520 | return reloc_class_plt; |
a6bb11b2 | 5521 | case AARCH64_R (COPY): |
a06ea964 NC |
5522 | return reloc_class_copy; |
5523 | default: | |
5524 | return reloc_class_normal; | |
5525 | } | |
5526 | } | |
5527 | ||
5528 | /* Set the right machine number for an AArch64 ELF file. */ | |
5529 | ||
5530 | static bfd_boolean | |
cec5225b | 5531 | elfNN_aarch64_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) |
a06ea964 NC |
5532 | { |
5533 | if (hdr->sh_type == SHT_NOTE) | |
5534 | *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS; | |
5535 | ||
5536 | return TRUE; | |
5537 | } | |
5538 | ||
5539 | /* Handle an AArch64 specific section when reading an object file. This is | |
5540 | called when bfd_section_from_shdr finds a section with an unknown | |
5541 | type. */ | |
5542 | ||
5543 | static bfd_boolean | |
cec5225b | 5544 | elfNN_aarch64_section_from_shdr (bfd *abfd, |
a06ea964 NC |
5545 | Elf_Internal_Shdr *hdr, |
5546 | const char *name, int shindex) | |
5547 | { | |
5548 | /* There ought to be a place to keep ELF backend specific flags, but | |
5549 | at the moment there isn't one. We just keep track of the | |
5550 | sections by their name, instead. Fortunately, the ABI gives | |
5551 | names for all the AArch64 specific sections, so we will probably get | |
5552 | away with this. */ | |
5553 | switch (hdr->sh_type) | |
5554 | { | |
5555 | case SHT_AARCH64_ATTRIBUTES: | |
5556 | break; | |
5557 | ||
5558 | default: | |
5559 | return FALSE; | |
5560 | } | |
5561 | ||
5562 | if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) | |
5563 | return FALSE; | |
5564 | ||
5565 | return TRUE; | |
5566 | } | |
5567 | ||
5568 | /* A structure used to record a list of sections, independently | |
5569 | of the next and prev fields in the asection structure. */ | |
5570 | typedef struct section_list | |
5571 | { | |
5572 | asection *sec; | |
5573 | struct section_list *next; | |
5574 | struct section_list *prev; | |
5575 | } | |
5576 | section_list; | |
5577 | ||
5578 | /* Unfortunately we need to keep a list of sections for which | |
5579 | an _aarch64_elf_section_data structure has been allocated. This | |
cec5225b | 5580 | is because it is possible for functions like elfNN_aarch64_write_section |
a06ea964 NC |
5581 | to be called on a section which has had an elf_data_structure |
5582 | allocated for it (and so the used_by_bfd field is valid) but | |
5583 | for which the AArch64 extended version of this structure - the | |
5584 | _aarch64_elf_section_data structure - has not been allocated. */ | |
5585 | static section_list *sections_with_aarch64_elf_section_data = NULL; | |
5586 | ||
5587 | static void | |
5588 | record_section_with_aarch64_elf_section_data (asection *sec) | |
5589 | { | |
5590 | struct section_list *entry; | |
5591 | ||
5592 | entry = bfd_malloc (sizeof (*entry)); | |
5593 | if (entry == NULL) | |
5594 | return; | |
5595 | entry->sec = sec; | |
5596 | entry->next = sections_with_aarch64_elf_section_data; | |
5597 | entry->prev = NULL; | |
5598 | if (entry->next != NULL) | |
5599 | entry->next->prev = entry; | |
5600 | sections_with_aarch64_elf_section_data = entry; | |
5601 | } | |
5602 | ||
5603 | static struct section_list * | |
5604 | find_aarch64_elf_section_entry (asection *sec) | |
5605 | { | |
5606 | struct section_list *entry; | |
5607 | static struct section_list *last_entry = NULL; | |
5608 | ||
5609 | /* This is a short cut for the typical case where the sections are added | |
5610 | to the sections_with_aarch64_elf_section_data list in forward order and | |
5611 | then looked up here in backwards order. This makes a real difference | |
5612 | to the ld-srec/sec64k.exp linker test. */ | |
5613 | entry = sections_with_aarch64_elf_section_data; | |
5614 | if (last_entry != NULL) | |
5615 | { | |
5616 | if (last_entry->sec == sec) | |
5617 | entry = last_entry; | |
5618 | else if (last_entry->next != NULL && last_entry->next->sec == sec) | |
5619 | entry = last_entry->next; | |
5620 | } | |
5621 | ||
5622 | for (; entry; entry = entry->next) | |
5623 | if (entry->sec == sec) | |
5624 | break; | |
5625 | ||
5626 | if (entry) | |
5627 | /* Record the entry prior to this one - it is the entry we are | |
5628 | most likely to want to locate next time. Also this way if we | |
5629 | have been called from | |
5630 | unrecord_section_with_aarch64_elf_section_data () we will not | |
5631 | be caching a pointer that is about to be freed. */ | |
5632 | last_entry = entry->prev; | |
5633 | ||
5634 | return entry; | |
5635 | } | |
5636 | ||
5637 | static void | |
5638 | unrecord_section_with_aarch64_elf_section_data (asection *sec) | |
5639 | { | |
5640 | struct section_list *entry; | |
5641 | ||
5642 | entry = find_aarch64_elf_section_entry (sec); | |
5643 | ||
5644 | if (entry) | |
5645 | { | |
5646 | if (entry->prev != NULL) | |
5647 | entry->prev->next = entry->next; | |
5648 | if (entry->next != NULL) | |
5649 | entry->next->prev = entry->prev; | |
5650 | if (entry == sections_with_aarch64_elf_section_data) | |
5651 | sections_with_aarch64_elf_section_data = entry->next; | |
5652 | free (entry); | |
5653 | } | |
5654 | } | |
5655 | ||
5656 | ||
5657 | typedef struct | |
5658 | { | |
5659 | void *finfo; | |
5660 | struct bfd_link_info *info; | |
5661 | asection *sec; | |
5662 | int sec_shndx; | |
5663 | int (*func) (void *, const char *, Elf_Internal_Sym *, | |
5664 | asection *, struct elf_link_hash_entry *); | |
5665 | } output_arch_syminfo; | |
5666 | ||
5667 | enum map_symbol_type | |
5668 | { | |
5669 | AARCH64_MAP_INSN, | |
5670 | AARCH64_MAP_DATA | |
5671 | }; | |
5672 | ||
5673 | ||
5674 | /* Output a single mapping symbol. */ | |
5675 | ||
5676 | static bfd_boolean | |
cec5225b | 5677 | elfNN_aarch64_output_map_sym (output_arch_syminfo *osi, |
a06ea964 NC |
5678 | enum map_symbol_type type, bfd_vma offset) |
5679 | { | |
5680 | static const char *names[2] = { "$x", "$d" }; | |
5681 | Elf_Internal_Sym sym; | |
5682 | ||
5683 | sym.st_value = (osi->sec->output_section->vma | |
5684 | + osi->sec->output_offset + offset); | |
5685 | sym.st_size = 0; | |
5686 | sym.st_other = 0; | |
5687 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE); | |
5688 | sym.st_shndx = osi->sec_shndx; | |
5689 | return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1; | |
5690 | } | |
5691 | ||
5692 | ||
5693 | ||
5694 | /* Output mapping symbols for PLT entries associated with H. */ | |
5695 | ||
5696 | static bfd_boolean | |
cec5225b | 5697 | elfNN_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf) |
a06ea964 NC |
5698 | { |
5699 | output_arch_syminfo *osi = (output_arch_syminfo *) inf; | |
5700 | bfd_vma addr; | |
5701 | ||
5702 | if (h->root.type == bfd_link_hash_indirect) | |
5703 | return TRUE; | |
5704 | ||
5705 | if (h->root.type == bfd_link_hash_warning) | |
5706 | /* When warning symbols are created, they **replace** the "real" | |
5707 | entry in the hash table, thus we never get to see the real | |
5708 | symbol in a hash traversal. So look at it now. */ | |
5709 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5710 | ||
5711 | if (h->plt.offset == (bfd_vma) - 1) | |
5712 | return TRUE; | |
5713 | ||
5714 | addr = h->plt.offset; | |
5715 | if (addr == 32) | |
5716 | { | |
cec5225b | 5717 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
a06ea964 NC |
5718 | return FALSE; |
5719 | } | |
5720 | return TRUE; | |
5721 | } | |
5722 | ||
5723 | ||
5724 | /* Output a single local symbol for a generated stub. */ | |
5725 | ||
5726 | static bfd_boolean | |
cec5225b | 5727 | elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name, |
a06ea964 NC |
5728 | bfd_vma offset, bfd_vma size) |
5729 | { | |
5730 | Elf_Internal_Sym sym; | |
5731 | ||
5732 | sym.st_value = (osi->sec->output_section->vma | |
5733 | + osi->sec->output_offset + offset); | |
5734 | sym.st_size = size; | |
5735 | sym.st_other = 0; | |
5736 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC); | |
5737 | sym.st_shndx = osi->sec_shndx; | |
5738 | return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1; | |
5739 | } | |
5740 | ||
5741 | static bfd_boolean | |
5742 | aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) | |
5743 | { | |
cec5225b | 5744 | struct elf_aarch64_stub_hash_entry *stub_entry; |
a06ea964 NC |
5745 | asection *stub_sec; |
5746 | bfd_vma addr; | |
5747 | char *stub_name; | |
5748 | output_arch_syminfo *osi; | |
5749 | ||
5750 | /* Massage our args to the form they really have. */ | |
cec5225b | 5751 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
a06ea964 NC |
5752 | osi = (output_arch_syminfo *) in_arg; |
5753 | ||
5754 | stub_sec = stub_entry->stub_sec; | |
5755 | ||
5756 | /* Ensure this stub is attached to the current section being | |
5757 | processed. */ | |
5758 | if (stub_sec != osi->sec) | |
5759 | return TRUE; | |
5760 | ||
5761 | addr = (bfd_vma) stub_entry->stub_offset; | |
5762 | ||
5763 | stub_name = stub_entry->output_name; | |
5764 | ||
5765 | switch (stub_entry->stub_type) | |
5766 | { | |
5767 | case aarch64_stub_adrp_branch: | |
cec5225b | 5768 | if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, |
a06ea964 NC |
5769 | sizeof (aarch64_adrp_branch_stub))) |
5770 | return FALSE; | |
cec5225b | 5771 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
a06ea964 NC |
5772 | return FALSE; |
5773 | break; | |
5774 | case aarch64_stub_long_branch: | |
cec5225b | 5775 | if (!elfNN_aarch64_output_stub_sym |
a06ea964 NC |
5776 | (osi, stub_name, addr, sizeof (aarch64_long_branch_stub))) |
5777 | return FALSE; | |
cec5225b | 5778 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
a06ea964 | 5779 | return FALSE; |
cec5225b | 5780 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16)) |
a06ea964 NC |
5781 | return FALSE; |
5782 | break; | |
5783 | default: | |
5784 | BFD_FAIL (); | |
5785 | } | |
5786 | ||
5787 | return TRUE; | |
5788 | } | |
5789 | ||
5790 | /* Output mapping symbols for linker generated sections. */ | |
5791 | ||
5792 | static bfd_boolean | |
cec5225b | 5793 | elfNN_aarch64_output_arch_local_syms (bfd *output_bfd, |
a06ea964 NC |
5794 | struct bfd_link_info *info, |
5795 | void *finfo, | |
5796 | int (*func) (void *, const char *, | |
5797 | Elf_Internal_Sym *, | |
5798 | asection *, | |
5799 | struct elf_link_hash_entry | |
5800 | *)) | |
5801 | { | |
5802 | output_arch_syminfo osi; | |
cec5225b | 5803 | struct elf_aarch64_link_hash_table *htab; |
a06ea964 | 5804 | |
cec5225b | 5805 | htab = elf_aarch64_hash_table (info); |
a06ea964 NC |
5806 | |
5807 | osi.finfo = finfo; | |
5808 | osi.info = info; | |
5809 | osi.func = func; | |
5810 | ||
5811 | /* Long calls stubs. */ | |
5812 | if (htab->stub_bfd && htab->stub_bfd->sections) | |
5813 | { | |
5814 | asection *stub_sec; | |
5815 | ||
5816 | for (stub_sec = htab->stub_bfd->sections; | |
5817 | stub_sec != NULL; stub_sec = stub_sec->next) | |
5818 | { | |
5819 | /* Ignore non-stub sections. */ | |
5820 | if (!strstr (stub_sec->name, STUB_SUFFIX)) | |
5821 | continue; | |
5822 | ||
5823 | osi.sec = stub_sec; | |
5824 | ||
5825 | osi.sec_shndx = _bfd_elf_section_from_bfd_section | |
5826 | (output_bfd, osi.sec->output_section); | |
5827 | ||
5828 | bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub, | |
5829 | &osi); | |
5830 | } | |
5831 | } | |
5832 | ||
5833 | /* Finally, output mapping symbols for the PLT. */ | |
5834 | if (!htab->root.splt || htab->root.splt->size == 0) | |
5835 | return TRUE; | |
5836 | ||
5837 | /* For now live without mapping symbols for the plt. */ | |
5838 | osi.sec_shndx = _bfd_elf_section_from_bfd_section | |
5839 | (output_bfd, htab->root.splt->output_section); | |
5840 | osi.sec = htab->root.splt; | |
5841 | ||
cec5225b | 5842 | elf_link_hash_traverse (&htab->root, elfNN_aarch64_output_plt_map, |
a06ea964 NC |
5843 | (void *) &osi); |
5844 | ||
5845 | return TRUE; | |
5846 | ||
5847 | } | |
5848 | ||
5849 | /* Allocate target specific section data. */ | |
5850 | ||
5851 | static bfd_boolean | |
cec5225b | 5852 | elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec) |
a06ea964 NC |
5853 | { |
5854 | if (!sec->used_by_bfd) | |
5855 | { | |
5856 | _aarch64_elf_section_data *sdata; | |
5857 | bfd_size_type amt = sizeof (*sdata); | |
5858 | ||
5859 | sdata = bfd_zalloc (abfd, amt); | |
5860 | if (sdata == NULL) | |
5861 | return FALSE; | |
5862 | sec->used_by_bfd = sdata; | |
5863 | } | |
5864 | ||
5865 | record_section_with_aarch64_elf_section_data (sec); | |
5866 | ||
5867 | return _bfd_elf_new_section_hook (abfd, sec); | |
5868 | } | |
5869 | ||
5870 | ||
5871 | static void | |
5872 | unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED, | |
5873 | asection *sec, | |
5874 | void *ignore ATTRIBUTE_UNUSED) | |
5875 | { | |
5876 | unrecord_section_with_aarch64_elf_section_data (sec); | |
5877 | } | |
5878 | ||
5879 | static bfd_boolean | |
cec5225b | 5880 | elfNN_aarch64_close_and_cleanup (bfd *abfd) |
a06ea964 NC |
5881 | { |
5882 | if (abfd->sections) | |
5883 | bfd_map_over_sections (abfd, | |
5884 | unrecord_section_via_map_over_sections, NULL); | |
5885 | ||
5886 | return _bfd_elf_close_and_cleanup (abfd); | |
5887 | } | |
5888 | ||
5889 | static bfd_boolean | |
cec5225b | 5890 | elfNN_aarch64_bfd_free_cached_info (bfd *abfd) |
a06ea964 NC |
5891 | { |
5892 | if (abfd->sections) | |
5893 | bfd_map_over_sections (abfd, | |
5894 | unrecord_section_via_map_over_sections, NULL); | |
5895 | ||
5896 | return _bfd_free_cached_info (abfd); | |
5897 | } | |
5898 | ||
a06ea964 NC |
5899 | /* Create dynamic sections. This is different from the ARM backend in that |
5900 | the got, plt, gotplt and their relocation sections are all created in the | |
5901 | standard part of the bfd elf backend. */ | |
5902 | ||
5903 | static bfd_boolean | |
cec5225b | 5904 | elfNN_aarch64_create_dynamic_sections (bfd *dynobj, |
a06ea964 NC |
5905 | struct bfd_link_info *info) |
5906 | { | |
cec5225b | 5907 | struct elf_aarch64_link_hash_table *htab; |
cc0efaa8 MS |
5908 | |
5909 | /* We need to create .got section. */ | |
5910 | if (!aarch64_elf_create_got_section (dynobj, info)) | |
5911 | return FALSE; | |
a06ea964 NC |
5912 | |
5913 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
5914 | return FALSE; | |
5915 | ||
cec5225b | 5916 | htab = elf_aarch64_hash_table (info); |
a06ea964 NC |
5917 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
5918 | if (!info->shared) | |
5919 | htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); | |
5920 | ||
5921 | if (!htab->sdynbss || (!info->shared && !htab->srelbss)) | |
5922 | abort (); | |
5923 | ||
a06ea964 NC |
5924 | return TRUE; |
5925 | } | |
5926 | ||
5927 | ||
5928 | /* Allocate space in .plt, .got and associated reloc sections for | |
5929 | dynamic relocs. */ | |
5930 | ||
5931 | static bfd_boolean | |
cec5225b | 5932 | elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
a06ea964 NC |
5933 | { |
5934 | struct bfd_link_info *info; | |
cec5225b YZ |
5935 | struct elf_aarch64_link_hash_table *htab; |
5936 | struct elf_aarch64_link_hash_entry *eh; | |
a06ea964 NC |
5937 | struct elf_dyn_relocs *p; |
5938 | ||
5939 | /* An example of a bfd_link_hash_indirect symbol is versioned | |
5940 | symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) | |
5941 | -> __gxx_personality_v0(bfd_link_hash_defined) | |
5942 | ||
5943 | There is no need to process bfd_link_hash_indirect symbols here | |
5944 | because we will also be presented with the concrete instance of | |
cec5225b | 5945 | the symbol and elfNN_aarch64_copy_indirect_symbol () will have been |
a06ea964 NC |
5946 | called to copy all relevant data from the generic to the concrete |
5947 | symbol instance. | |
5948 | */ | |
5949 | if (h->root.type == bfd_link_hash_indirect) | |
5950 | return TRUE; | |
5951 | ||
5952 | if (h->root.type == bfd_link_hash_warning) | |
5953 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5954 | ||
5955 | info = (struct bfd_link_info *) inf; | |
cec5225b | 5956 | htab = elf_aarch64_hash_table (info); |
a06ea964 | 5957 | |
1419bbe5 WN |
5958 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
5959 | here if it is defined and referenced in a non-shared object. */ | |
5960 | if (h->type == STT_GNU_IFUNC | |
5961 | && h->def_regular) | |
5962 | return TRUE; | |
5963 | else if (htab->root.dynamic_sections_created && h->plt.refcount > 0) | |
a06ea964 NC |
5964 | { |
5965 | /* Make sure this symbol is output as a dynamic symbol. | |
5966 | Undefined weak syms won't yet be marked as dynamic. */ | |
5967 | if (h->dynindx == -1 && !h->forced_local) | |
5968 | { | |
5969 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) | |
5970 | return FALSE; | |
5971 | } | |
5972 | ||
5973 | if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
5974 | { | |
5975 | asection *s = htab->root.splt; | |
5976 | ||
5977 | /* If this is the first .plt entry, make room for the special | |
5978 | first entry. */ | |
5979 | if (s->size == 0) | |
5980 | s->size += htab->plt_header_size; | |
5981 | ||
5982 | h->plt.offset = s->size; | |
5983 | ||
5984 | /* If this symbol is not defined in a regular file, and we are | |
5985 | not generating a shared library, then set the symbol to this | |
5986 | location in the .plt. This is required to make function | |
5987 | pointers compare as equal between the normal executable and | |
5988 | the shared library. */ | |
5989 | if (!info->shared && !h->def_regular) | |
5990 | { | |
5991 | h->root.u.def.section = s; | |
5992 | h->root.u.def.value = h->plt.offset; | |
5993 | } | |
5994 | ||
5995 | /* Make room for this entry. For now we only create the | |
5996 | small model PLT entries. We later need to find a way | |
5997 | of relaxing into these from the large model PLT entries. */ | |
5998 | s->size += PLT_SMALL_ENTRY_SIZE; | |
5999 | ||
6000 | /* We also need to make an entry in the .got.plt section, which | |
6001 | will be placed in the .got section by the linker script. */ | |
6002 | htab->root.sgotplt->size += GOT_ENTRY_SIZE; | |
6003 | ||
6004 | /* We also need to make an entry in the .rela.plt section. */ | |
6005 | htab->root.srelplt->size += RELOC_SIZE (htab); | |
6006 | ||
6007 | /* We need to ensure that all GOT entries that serve the PLT | |
6008 | are consecutive with the special GOT slots [0] [1] and | |
6009 | [2]. Any addtional relocations, such as | |
6010 | R_AARCH64_TLSDESC, must be placed after the PLT related | |
6011 | entries. We abuse the reloc_count such that during | |
6012 | sizing we adjust reloc_count to indicate the number of | |
6013 | PLT related reserved entries. In subsequent phases when | |
6014 | filling in the contents of the reloc entries, PLT related | |
6015 | entries are placed by computing their PLT index (0 | |
6016 | .. reloc_count). While other none PLT relocs are placed | |
6017 | at the slot indicated by reloc_count and reloc_count is | |
6018 | updated. */ | |
6019 | ||
6020 | htab->root.srelplt->reloc_count++; | |
6021 | } | |
6022 | else | |
6023 | { | |
6024 | h->plt.offset = (bfd_vma) - 1; | |
6025 | h->needs_plt = 0; | |
6026 | } | |
6027 | } | |
6028 | else | |
6029 | { | |
6030 | h->plt.offset = (bfd_vma) - 1; | |
6031 | h->needs_plt = 0; | |
6032 | } | |
6033 | ||
cec5225b | 6034 | eh = (struct elf_aarch64_link_hash_entry *) h; |
a06ea964 NC |
6035 | eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
6036 | ||
6037 | if (h->got.refcount > 0) | |
6038 | { | |
6039 | bfd_boolean dyn; | |
cec5225b | 6040 | unsigned got_type = elf_aarch64_hash_entry (h)->got_type; |
a06ea964 NC |
6041 | |
6042 | h->got.offset = (bfd_vma) - 1; | |
6043 | ||
6044 | dyn = htab->root.dynamic_sections_created; | |
6045 | ||
6046 | /* Make sure this symbol is output as a dynamic symbol. | |
6047 | Undefined weak syms won't yet be marked as dynamic. */ | |
6048 | if (dyn && h->dynindx == -1 && !h->forced_local) | |
6049 | { | |
6050 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) | |
6051 | return FALSE; | |
6052 | } | |
6053 | ||
6054 | if (got_type == GOT_UNKNOWN) | |
6055 | { | |
6056 | } | |
6057 | else if (got_type == GOT_NORMAL) | |
6058 | { | |
6059 | h->got.offset = htab->root.sgot->size; | |
6060 | htab->root.sgot->size += GOT_ENTRY_SIZE; | |
6061 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
6062 | || h->root.type != bfd_link_hash_undefweak) | |
6063 | && (info->shared | |
6064 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
6065 | { | |
6066 | htab->root.srelgot->size += RELOC_SIZE (htab); | |
6067 | } | |
6068 | } | |
6069 | else | |
6070 | { | |
6071 | int indx; | |
6072 | if (got_type & GOT_TLSDESC_GD) | |
6073 | { | |
6074 | eh->tlsdesc_got_jump_table_offset = | |
6075 | (htab->root.sgotplt->size | |
6076 | - aarch64_compute_jump_table_size (htab)); | |
6077 | htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2; | |
6078 | h->got.offset = (bfd_vma) - 2; | |
6079 | } | |
6080 | ||
6081 | if (got_type & GOT_TLS_GD) | |
6082 | { | |
6083 | h->got.offset = htab->root.sgot->size; | |
6084 | htab->root.sgot->size += GOT_ENTRY_SIZE * 2; | |
6085 | } | |
6086 | ||
6087 | if (got_type & GOT_TLS_IE) | |
6088 | { | |
6089 | h->got.offset = htab->root.sgot->size; | |
6090 | htab->root.sgot->size += GOT_ENTRY_SIZE; | |
6091 | } | |
6092 | ||
6093 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
6094 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
6095 | || h->root.type != bfd_link_hash_undefweak) | |
6096 | && (info->shared | |
6097 | || indx != 0 | |
6098 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
6099 | { | |
6100 | if (got_type & GOT_TLSDESC_GD) | |
6101 | { | |
6102 | htab->root.srelplt->size += RELOC_SIZE (htab); | |
6103 | /* Note reloc_count not incremented here! We have | |
6104 | already adjusted reloc_count for this relocation | |
6105 | type. */ | |
6106 | ||
6107 | /* TLSDESC PLT is now needed, but not yet determined. */ | |
6108 | htab->tlsdesc_plt = (bfd_vma) - 1; | |
6109 | } | |
6110 | ||
6111 | if (got_type & GOT_TLS_GD) | |
6112 | htab->root.srelgot->size += RELOC_SIZE (htab) * 2; | |
6113 | ||
6114 | if (got_type & GOT_TLS_IE) | |
6115 | htab->root.srelgot->size += RELOC_SIZE (htab); | |
6116 | } | |
6117 | } | |
6118 | } | |
6119 | else | |
6120 | { | |
6121 | h->got.offset = (bfd_vma) - 1; | |
6122 | } | |
6123 | ||
6124 | if (eh->dyn_relocs == NULL) | |
6125 | return TRUE; | |
6126 | ||
6127 | /* In the shared -Bsymbolic case, discard space allocated for | |
6128 | dynamic pc-relative relocs against symbols which turn out to be | |
6129 | defined in regular objects. For the normal shared case, discard | |
6130 | space for pc-relative relocs that have become local due to symbol | |
6131 | visibility changes. */ | |
6132 | ||
6133 | if (info->shared) | |
6134 | { | |
6135 | /* Relocs that use pc_count are those that appear on a call | |
6136 | insn, or certain REL relocs that can generated via assembly. | |
6137 | We want calls to protected symbols to resolve directly to the | |
6138 | function rather than going via the plt. If people want | |
6139 | function pointer comparisons to work as expected then they | |
6140 | should avoid writing weird assembly. */ | |
6141 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
6142 | { | |
6143 | struct elf_dyn_relocs **pp; | |
6144 | ||
6145 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) | |
6146 | { | |
6147 | p->count -= p->pc_count; | |
6148 | p->pc_count = 0; | |
6149 | if (p->count == 0) | |
6150 | *pp = p->next; | |
6151 | else | |
6152 | pp = &p->next; | |
6153 | } | |
6154 | } | |
6155 | ||
6156 | /* Also discard relocs on undefined weak syms with non-default | |
6157 | visibility. */ | |
6158 | if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak) | |
6159 | { | |
6160 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
6161 | eh->dyn_relocs = NULL; | |
6162 | ||
6163 | /* Make sure undefined weak symbols are output as a dynamic | |
6164 | symbol in PIEs. */ | |
6165 | else if (h->dynindx == -1 | |
6166 | && !h->forced_local | |
6167 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
6168 | return FALSE; | |
6169 | } | |
6170 | ||
6171 | } | |
6172 | else if (ELIMINATE_COPY_RELOCS) | |
6173 | { | |
6174 | /* For the non-shared case, discard space for relocs against | |
6175 | symbols which turn out to need copy relocs or are not | |
6176 | dynamic. */ | |
6177 | ||
6178 | if (!h->non_got_ref | |
6179 | && ((h->def_dynamic | |
6180 | && !h->def_regular) | |
6181 | || (htab->root.dynamic_sections_created | |
6182 | && (h->root.type == bfd_link_hash_undefweak | |
6183 | || h->root.type == bfd_link_hash_undefined)))) | |
6184 | { | |
6185 | /* Make sure this symbol is output as a dynamic symbol. | |
6186 | Undefined weak syms won't yet be marked as dynamic. */ | |
6187 | if (h->dynindx == -1 | |
6188 | && !h->forced_local | |
6189 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
6190 | return FALSE; | |
6191 | ||
6192 | /* If that succeeded, we know we'll be keeping all the | |
6193 | relocs. */ | |
6194 | if (h->dynindx != -1) | |
6195 | goto keep; | |
6196 | } | |
6197 | ||
6198 | eh->dyn_relocs = NULL; | |
6199 | ||
6200 | keep:; | |
6201 | } | |
6202 | ||
6203 | /* Finally, allocate space. */ | |
6204 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
6205 | { | |
6206 | asection *sreloc; | |
6207 | ||
6208 | sreloc = elf_section_data (p->sec)->sreloc; | |
6209 | ||
6210 | BFD_ASSERT (sreloc != NULL); | |
6211 | ||
6212 | sreloc->size += p->count * RELOC_SIZE (htab); | |
6213 | } | |
6214 | ||
6215 | return TRUE; | |
6216 | } | |
6217 | ||
1419bbe5 WN |
6218 | /* Allocate space in .plt, .got and associated reloc sections for |
6219 | ifunc dynamic relocs. */ | |
6220 | ||
6221 | static bfd_boolean | |
6222 | elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h, | |
6223 | void *inf) | |
6224 | { | |
6225 | struct bfd_link_info *info; | |
6226 | struct elf_aarch64_link_hash_table *htab; | |
6227 | struct elf_aarch64_link_hash_entry *eh; | |
6228 | ||
6229 | /* An example of a bfd_link_hash_indirect symbol is versioned | |
6230 | symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) | |
6231 | -> __gxx_personality_v0(bfd_link_hash_defined) | |
6232 | ||
6233 | There is no need to process bfd_link_hash_indirect symbols here | |
6234 | because we will also be presented with the concrete instance of | |
6235 | the symbol and elfNN_aarch64_copy_indirect_symbol () will have been | |
6236 | called to copy all relevant data from the generic to the concrete | |
6237 | symbol instance. | |
6238 | */ | |
6239 | if (h->root.type == bfd_link_hash_indirect) | |
6240 | return TRUE; | |
6241 | ||
6242 | if (h->root.type == bfd_link_hash_warning) | |
6243 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
6244 | ||
6245 | info = (struct bfd_link_info *) inf; | |
6246 | htab = elf_aarch64_hash_table (info); | |
6247 | ||
6248 | eh = (struct elf_aarch64_link_hash_entry *) h; | |
6249 | ||
6250 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it | |
6251 | here if it is defined and referenced in a non-shared object. */ | |
6252 | if (h->type == STT_GNU_IFUNC | |
6253 | && h->def_regular) | |
6254 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
6255 | &eh->dyn_relocs, | |
6256 | htab->plt_entry_size, | |
6257 | htab->plt_header_size, | |
6258 | GOT_ENTRY_SIZE); | |
6259 | return TRUE; | |
6260 | } | |
6261 | ||
6262 | /* Allocate space in .plt, .got and associated reloc sections for | |
6263 | local dynamic relocs. */ | |
6264 | ||
6265 | static bfd_boolean | |
6266 | elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf) | |
6267 | { | |
6268 | struct elf_link_hash_entry *h | |
6269 | = (struct elf_link_hash_entry *) *slot; | |
6270 | ||
6271 | if (h->type != STT_GNU_IFUNC | |
6272 | || !h->def_regular | |
6273 | || !h->ref_regular | |
6274 | || !h->forced_local | |
6275 | || h->root.type != bfd_link_hash_defined) | |
6276 | abort (); | |
6277 | ||
6278 | return elfNN_aarch64_allocate_dynrelocs (h, inf); | |
6279 | } | |
6280 | ||
6281 | /* Allocate space in .plt, .got and associated reloc sections for | |
6282 | local ifunc dynamic relocs. */ | |
6283 | ||
6284 | static bfd_boolean | |
6285 | elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf) | |
6286 | { | |
6287 | struct elf_link_hash_entry *h | |
6288 | = (struct elf_link_hash_entry *) *slot; | |
6289 | ||
6290 | if (h->type != STT_GNU_IFUNC | |
6291 | || !h->def_regular | |
6292 | || !h->ref_regular | |
6293 | || !h->forced_local | |
6294 | || h->root.type != bfd_link_hash_defined) | |
6295 | abort (); | |
6296 | ||
6297 | return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf); | |
6298 | } | |
a06ea964 | 6299 | |
a06ea964 NC |
6300 | /* This is the most important function of all . Innocuosly named |
6301 | though ! */ | |
6302 | static bfd_boolean | |
cec5225b | 6303 | elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
a06ea964 NC |
6304 | struct bfd_link_info *info) |
6305 | { | |
cec5225b | 6306 | struct elf_aarch64_link_hash_table *htab; |
a06ea964 NC |
6307 | bfd *dynobj; |
6308 | asection *s; | |
6309 | bfd_boolean relocs; | |
6310 | bfd *ibfd; | |
6311 | ||
cec5225b | 6312 | htab = elf_aarch64_hash_table ((info)); |
a06ea964 NC |
6313 | dynobj = htab->root.dynobj; |
6314 | ||
6315 | BFD_ASSERT (dynobj != NULL); | |
6316 | ||
6317 | if (htab->root.dynamic_sections_created) | |
6318 | { | |
6319 | if (info->executable) | |
6320 | { | |
6321 | s = bfd_get_linker_section (dynobj, ".interp"); | |
6322 | if (s == NULL) | |
6323 | abort (); | |
6324 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
6325 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
6326 | } | |
6327 | } | |
6328 | ||
6329 | /* Set up .got offsets for local syms, and space for local dynamic | |
6330 | relocs. */ | |
6331 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
6332 | { | |
6333 | struct elf_aarch64_local_symbol *locals = NULL; | |
6334 | Elf_Internal_Shdr *symtab_hdr; | |
6335 | asection *srel; | |
6336 | unsigned int i; | |
6337 | ||
6338 | if (!is_aarch64_elf (ibfd)) | |
6339 | continue; | |
6340 | ||
6341 | for (s = ibfd->sections; s != NULL; s = s->next) | |
6342 | { | |
6343 | struct elf_dyn_relocs *p; | |
6344 | ||
6345 | for (p = (struct elf_dyn_relocs *) | |
6346 | (elf_section_data (s)->local_dynrel); p != NULL; p = p->next) | |
6347 | { | |
6348 | if (!bfd_is_abs_section (p->sec) | |
6349 | && bfd_is_abs_section (p->sec->output_section)) | |
6350 | { | |
6351 | /* Input section has been discarded, either because | |
6352 | it is a copy of a linkonce section or due to | |
6353 | linker script /DISCARD/, so we'll be discarding | |
6354 | the relocs too. */ | |
6355 | } | |
6356 | else if (p->count != 0) | |
6357 | { | |
6358 | srel = elf_section_data (p->sec)->sreloc; | |
6359 | srel->size += p->count * RELOC_SIZE (htab); | |
6360 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) | |
6361 | info->flags |= DF_TEXTREL; | |
6362 | } | |
6363 | } | |
6364 | } | |
6365 | ||
cec5225b | 6366 | locals = elf_aarch64_locals (ibfd); |
a06ea964 NC |
6367 | if (!locals) |
6368 | continue; | |
6369 | ||
6370 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
6371 | srel = htab->root.srelgot; | |
6372 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
6373 | { | |
6374 | locals[i].got_offset = (bfd_vma) - 1; | |
6375 | locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1; | |
6376 | if (locals[i].got_refcount > 0) | |
6377 | { | |
6378 | unsigned got_type = locals[i].got_type; | |
6379 | if (got_type & GOT_TLSDESC_GD) | |
6380 | { | |
6381 | locals[i].tlsdesc_got_jump_table_offset = | |
6382 | (htab->root.sgotplt->size | |
6383 | - aarch64_compute_jump_table_size (htab)); | |
6384 | htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2; | |
6385 | locals[i].got_offset = (bfd_vma) - 2; | |
6386 | } | |
6387 | ||
6388 | if (got_type & GOT_TLS_GD) | |
6389 | { | |
6390 | locals[i].got_offset = htab->root.sgot->size; | |
6391 | htab->root.sgot->size += GOT_ENTRY_SIZE * 2; | |
6392 | } | |
6393 | ||
6394 | if (got_type & GOT_TLS_IE) | |
6395 | { | |
6396 | locals[i].got_offset = htab->root.sgot->size; | |
6397 | htab->root.sgot->size += GOT_ENTRY_SIZE; | |
6398 | } | |
6399 | ||
6400 | if (got_type == GOT_UNKNOWN) | |
6401 | { | |
6402 | } | |
6403 | ||
6404 | if (got_type == GOT_NORMAL) | |
6405 | { | |
6406 | } | |
6407 | ||
6408 | if (info->shared) | |
6409 | { | |
6410 | if (got_type & GOT_TLSDESC_GD) | |
6411 | { | |
6412 | htab->root.srelplt->size += RELOC_SIZE (htab); | |
6413 | /* Note RELOC_COUNT not incremented here! */ | |
6414 | htab->tlsdesc_plt = (bfd_vma) - 1; | |
6415 | } | |
6416 | ||
6417 | if (got_type & GOT_TLS_GD) | |
6418 | htab->root.srelgot->size += RELOC_SIZE (htab) * 2; | |
6419 | ||
6420 | if (got_type & GOT_TLS_IE) | |
6421 | htab->root.srelgot->size += RELOC_SIZE (htab); | |
6422 | } | |
6423 | } | |
6424 | else | |
6425 | { | |
6426 | locals[i].got_refcount = (bfd_vma) - 1; | |
6427 | } | |
6428 | } | |
6429 | } | |
6430 | ||
6431 | ||
6432 | /* Allocate global sym .plt and .got entries, and space for global | |
6433 | sym dynamic relocs. */ | |
cec5225b | 6434 | elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs, |
a06ea964 NC |
6435 | info); |
6436 | ||
1419bbe5 WN |
6437 | /* Allocate global ifunc sym .plt and .got entries, and space for global |
6438 | ifunc sym dynamic relocs. */ | |
6439 | elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs, | |
6440 | info); | |
6441 | ||
6442 | /* Allocate .plt and .got entries, and space for local symbols. */ | |
6443 | htab_traverse (htab->loc_hash_table, | |
6444 | elfNN_aarch64_allocate_local_dynrelocs, | |
6445 | info); | |
6446 | ||
6447 | /* Allocate .plt and .got entries, and space for local ifunc symbols. */ | |
6448 | htab_traverse (htab->loc_hash_table, | |
6449 | elfNN_aarch64_allocate_local_ifunc_dynrelocs, | |
6450 | info); | |
a06ea964 NC |
6451 | |
6452 | /* For every jump slot reserved in the sgotplt, reloc_count is | |
6453 | incremented. However, when we reserve space for TLS descriptors, | |
6454 | it's not incremented, so in order to compute the space reserved | |
6455 | for them, it suffices to multiply the reloc count by the jump | |
6456 | slot size. */ | |
6457 | ||
6458 | if (htab->root.srelplt) | |
8847944f | 6459 | htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab); |
a06ea964 NC |
6460 | |
6461 | if (htab->tlsdesc_plt) | |
6462 | { | |
6463 | if (htab->root.splt->size == 0) | |
6464 | htab->root.splt->size += PLT_ENTRY_SIZE; | |
6465 | ||
6466 | htab->tlsdesc_plt = htab->root.splt->size; | |
6467 | htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE; | |
6468 | ||
6469 | /* If we're not using lazy TLS relocations, don't generate the | |
6470 | GOT entry required. */ | |
6471 | if (!(info->flags & DF_BIND_NOW)) | |
6472 | { | |
6473 | htab->dt_tlsdesc_got = htab->root.sgot->size; | |
6474 | htab->root.sgot->size += GOT_ENTRY_SIZE; | |
6475 | } | |
6476 | } | |
6477 | ||
6478 | /* We now have determined the sizes of the various dynamic sections. | |
6479 | Allocate memory for them. */ | |
6480 | relocs = FALSE; | |
6481 | for (s = dynobj->sections; s != NULL; s = s->next) | |
6482 | { | |
6483 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
6484 | continue; | |
6485 | ||
6486 | if (s == htab->root.splt | |
6487 | || s == htab->root.sgot | |
6488 | || s == htab->root.sgotplt | |
6489 | || s == htab->root.iplt | |
6490 | || s == htab->root.igotplt || s == htab->sdynbss) | |
6491 | { | |
6492 | /* Strip this section if we don't need it; see the | |
6493 | comment below. */ | |
6494 | } | |
6495 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) | |
6496 | { | |
6497 | if (s->size != 0 && s != htab->root.srelplt) | |
6498 | relocs = TRUE; | |
6499 | ||
6500 | /* We use the reloc_count field as a counter if we need | |
6501 | to copy relocs into the output file. */ | |
6502 | if (s != htab->root.srelplt) | |
6503 | s->reloc_count = 0; | |
6504 | } | |
6505 | else | |
6506 | { | |
6507 | /* It's not one of our sections, so don't allocate space. */ | |
6508 | continue; | |
6509 | } | |
6510 | ||
6511 | if (s->size == 0) | |
6512 | { | |
6513 | /* If we don't need this section, strip it from the | |
6514 | output file. This is mostly to handle .rela.bss and | |
6515 | .rela.plt. We must create both sections in | |
6516 | create_dynamic_sections, because they must be created | |
6517 | before the linker maps input sections to output | |
6518 | sections. The linker does that before | |
6519 | adjust_dynamic_symbol is called, and it is that | |
6520 | function which decides whether anything needs to go | |
6521 | into these sections. */ | |
6522 | ||
6523 | s->flags |= SEC_EXCLUDE; | |
6524 | continue; | |
6525 | } | |
6526 | ||
6527 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
6528 | continue; | |
6529 | ||
6530 | /* Allocate memory for the section contents. We use bfd_zalloc | |
6531 | here in case unused entries are not reclaimed before the | |
6532 | section's contents are written out. This should not happen, | |
6533 | but this way if it does, we get a R_AARCH64_NONE reloc instead | |
6534 | of garbage. */ | |
6535 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
6536 | if (s->contents == NULL) | |
6537 | return FALSE; | |
6538 | } | |
6539 | ||
6540 | if (htab->root.dynamic_sections_created) | |
6541 | { | |
6542 | /* Add some entries to the .dynamic section. We fill in the | |
cec5225b | 6543 | values later, in elfNN_aarch64_finish_dynamic_sections, but we |
a06ea964 NC |
6544 | must add the entries now so that we get the correct size for |
6545 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
6546 | dynamic linker and used by the debugger. */ | |
6547 | #define add_dynamic_entry(TAG, VAL) \ | |
6548 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
6549 | ||
6550 | if (info->executable) | |
6551 | { | |
6552 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
6553 | return FALSE; | |
6554 | } | |
6555 | ||
6556 | if (htab->root.splt->size != 0) | |
6557 | { | |
6558 | if (!add_dynamic_entry (DT_PLTGOT, 0) | |
6559 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
6560 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
6561 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
6562 | return FALSE; | |
6563 | ||
6564 | if (htab->tlsdesc_plt | |
6565 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
6566 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
6567 | return FALSE; | |
6568 | } | |
6569 | ||
6570 | if (relocs) | |
6571 | { | |
6572 | if (!add_dynamic_entry (DT_RELA, 0) | |
6573 | || !add_dynamic_entry (DT_RELASZ, 0) | |
6574 | || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab))) | |
6575 | return FALSE; | |
6576 | ||
6577 | /* If any dynamic relocs apply to a read-only section, | |
6578 | then we need a DT_TEXTREL entry. */ | |
6579 | if ((info->flags & DF_TEXTREL) != 0) | |
6580 | { | |
6581 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
6582 | return FALSE; | |
6583 | } | |
6584 | } | |
6585 | } | |
6586 | #undef add_dynamic_entry | |
6587 | ||
6588 | return TRUE; | |
a06ea964 NC |
6589 | } |
6590 | ||
6591 | static inline void | |
caed7120 YZ |
6592 | elf_aarch64_update_plt_entry (bfd *output_bfd, |
6593 | bfd_reloc_code_real_type r_type, | |
6594 | bfd_byte *plt_entry, bfd_vma value) | |
a06ea964 | 6595 | { |
caed7120 YZ |
6596 | reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type); |
6597 | ||
6598 | _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value); | |
a06ea964 NC |
6599 | } |
6600 | ||
6601 | static void | |
cec5225b YZ |
6602 | elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h, |
6603 | struct elf_aarch64_link_hash_table | |
1419bbe5 WN |
6604 | *htab, bfd *output_bfd, |
6605 | struct bfd_link_info *info) | |
a06ea964 NC |
6606 | { |
6607 | bfd_byte *plt_entry; | |
6608 | bfd_vma plt_index; | |
6609 | bfd_vma got_offset; | |
6610 | bfd_vma gotplt_entry_address; | |
6611 | bfd_vma plt_entry_address; | |
6612 | Elf_Internal_Rela rela; | |
6613 | bfd_byte *loc; | |
1419bbe5 WN |
6614 | asection *plt, *gotplt, *relplt; |
6615 | ||
6616 | /* When building a static executable, use .iplt, .igot.plt and | |
6617 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6618 | if (htab->root.splt != NULL) | |
6619 | { | |
6620 | plt = htab->root.splt; | |
6621 | gotplt = htab->root.sgotplt; | |
6622 | relplt = htab->root.srelplt; | |
6623 | } | |
6624 | else | |
6625 | { | |
6626 | plt = htab->root.iplt; | |
6627 | gotplt = htab->root.igotplt; | |
6628 | relplt = htab->root.irelplt; | |
6629 | } | |
6630 | ||
6631 | /* Get the index in the procedure linkage table which | |
6632 | corresponds to this symbol. This is the index of this symbol | |
6633 | in all the symbols for which we are making plt entries. The | |
6634 | first entry in the procedure linkage table is reserved. | |
a06ea964 | 6635 | |
1419bbe5 WN |
6636 | Get the offset into the .got table of the entry that |
6637 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE | |
6638 | bytes. The first three are reserved for the dynamic linker. | |
692e2b8b | 6639 | |
1419bbe5 WN |
6640 | For static executables, we don't reserve anything. */ |
6641 | ||
6642 | if (plt == htab->root.splt) | |
6643 | { | |
6644 | plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size; | |
6645 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; | |
6646 | } | |
6647 | else | |
6648 | { | |
6649 | plt_index = h->plt.offset / htab->plt_entry_size; | |
6650 | got_offset = plt_index * GOT_ENTRY_SIZE; | |
6651 | } | |
6652 | ||
6653 | plt_entry = plt->contents + h->plt.offset; | |
6654 | plt_entry_address = plt->output_section->vma | |
6655 | + plt->output_section->output_offset + h->plt.offset; | |
6656 | gotplt_entry_address = gotplt->output_section->vma + | |
6657 | gotplt->output_offset + got_offset; | |
a06ea964 NC |
6658 | |
6659 | /* Copy in the boiler-plate for the PLTn entry. */ | |
cec5225b | 6660 | memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE); |
a06ea964 NC |
6661 | |
6662 | /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. | |
6663 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ | |
caed7120 YZ |
6664 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
6665 | plt_entry, | |
6666 | PG (gotplt_entry_address) - | |
6667 | PG (plt_entry_address)); | |
a06ea964 NC |
6668 | |
6669 | /* Fill in the lo12 bits for the load from the pltgot. */ | |
caed7120 YZ |
6670 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12, |
6671 | plt_entry + 4, | |
6672 | PG_OFFSET (gotplt_entry_address)); | |
a06ea964 | 6673 | |
9aff4b7a | 6674 | /* Fill in the lo12 bits for the add from the pltgot entry. */ |
caed7120 YZ |
6675 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12, |
6676 | plt_entry + 8, | |
6677 | PG_OFFSET (gotplt_entry_address)); | |
a06ea964 NC |
6678 | |
6679 | /* All the GOTPLT Entries are essentially initialized to PLT0. */ | |
cec5225b | 6680 | bfd_put_NN (output_bfd, |
1419bbe5 WN |
6681 | plt->output_section->vma + plt->output_offset, |
6682 | gotplt->contents + got_offset); | |
a06ea964 | 6683 | |
a06ea964 | 6684 | rela.r_offset = gotplt_entry_address; |
1419bbe5 WN |
6685 | |
6686 | if (h->dynindx == -1 | |
6687 | || ((info->executable | |
6688 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
6689 | && h->def_regular | |
6690 | && h->type == STT_GNU_IFUNC)) | |
6691 | { | |
6692 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
6693 | R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */ | |
6694 | rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE)); | |
6695 | rela.r_addend = (h->root.u.def.value | |
6696 | + h->root.u.def.section->output_section->vma | |
6697 | + h->root.u.def.section->output_offset); | |
6698 | } | |
6699 | else | |
6700 | { | |
6701 | /* Fill in the entry in the .rela.plt section. */ | |
6702 | rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT)); | |
6703 | rela.r_addend = 0; | |
6704 | } | |
a06ea964 NC |
6705 | |
6706 | /* Compute the relocation entry to used based on PLT index and do | |
6707 | not adjust reloc_count. The reloc_count has already been adjusted | |
6708 | to account for this entry. */ | |
1419bbe5 | 6709 | loc = relplt->contents + plt_index * RELOC_SIZE (htab); |
cec5225b | 6710 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
a06ea964 NC |
6711 | } |
6712 | ||
6713 | /* Size sections even though they're not dynamic. We use it to setup | |
6714 | _TLS_MODULE_BASE_, if needed. */ | |
6715 | ||
6716 | static bfd_boolean | |
cec5225b | 6717 | elfNN_aarch64_always_size_sections (bfd *output_bfd, |
a06ea964 NC |
6718 | struct bfd_link_info *info) |
6719 | { | |
6720 | asection *tls_sec; | |
6721 | ||
6722 | if (info->relocatable) | |
6723 | return TRUE; | |
6724 | ||
6725 | tls_sec = elf_hash_table (info)->tls_sec; | |
6726 | ||
6727 | if (tls_sec) | |
6728 | { | |
6729 | struct elf_link_hash_entry *tlsbase; | |
6730 | ||
6731 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
6732 | "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE); | |
6733 | ||
6734 | if (tlsbase) | |
6735 | { | |
6736 | struct bfd_link_hash_entry *h = NULL; | |
6737 | const struct elf_backend_data *bed = | |
6738 | get_elf_backend_data (output_bfd); | |
6739 | ||
6740 | if (!(_bfd_generic_link_add_one_symbol | |
6741 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
6742 | tls_sec, 0, NULL, FALSE, bed->collect, &h))) | |
6743 | return FALSE; | |
6744 | ||
6745 | tlsbase->type = STT_TLS; | |
6746 | tlsbase = (struct elf_link_hash_entry *) h; | |
6747 | tlsbase->def_regular = 1; | |
6748 | tlsbase->other = STV_HIDDEN; | |
6749 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
6750 | } | |
6751 | } | |
6752 | ||
6753 | return TRUE; | |
6754 | } | |
6755 | ||
6756 | /* Finish up dynamic symbol handling. We set the contents of various | |
6757 | dynamic sections here. */ | |
6758 | static bfd_boolean | |
cec5225b | 6759 | elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd, |
a06ea964 NC |
6760 | struct bfd_link_info *info, |
6761 | struct elf_link_hash_entry *h, | |
6762 | Elf_Internal_Sym *sym) | |
6763 | { | |
cec5225b YZ |
6764 | struct elf_aarch64_link_hash_table *htab; |
6765 | htab = elf_aarch64_hash_table (info); | |
a06ea964 NC |
6766 | |
6767 | if (h->plt.offset != (bfd_vma) - 1) | |
6768 | { | |
1419bbe5 WN |
6769 | asection *plt, *gotplt, *relplt; |
6770 | ||
a06ea964 NC |
6771 | /* This symbol has an entry in the procedure linkage table. Set |
6772 | it up. */ | |
6773 | ||
1419bbe5 WN |
6774 | /* When building a static executable, use .iplt, .igot.plt and |
6775 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6776 | if (htab->root.splt != NULL) | |
6777 | { | |
6778 | plt = htab->root.splt; | |
6779 | gotplt = htab->root.sgotplt; | |
6780 | relplt = htab->root.srelplt; | |
6781 | } | |
6782 | else | |
6783 | { | |
6784 | plt = htab->root.iplt; | |
6785 | gotplt = htab->root.igotplt; | |
6786 | relplt = htab->root.irelplt; | |
6787 | } | |
6788 | ||
6789 | /* This symbol has an entry in the procedure linkage table. Set | |
6790 | it up. */ | |
6791 | if ((h->dynindx == -1 | |
6792 | && !((h->forced_local || info->executable) | |
6793 | && h->def_regular | |
6794 | && h->type == STT_GNU_IFUNC)) | |
6795 | || plt == NULL | |
6796 | || gotplt == NULL | |
6797 | || relplt == NULL) | |
a06ea964 NC |
6798 | abort (); |
6799 | ||
1419bbe5 | 6800 | elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info); |
a06ea964 NC |
6801 | if (!h->def_regular) |
6802 | { | |
6803 | /* Mark the symbol as undefined, rather than as defined in | |
6804 | the .plt section. Leave the value alone. This is a clue | |
6805 | for the dynamic linker, to make function pointer | |
6806 | comparisons work between an application and shared | |
6807 | library. */ | |
6808 | sym->st_shndx = SHN_UNDEF; | |
6809 | } | |
6810 | } | |
6811 | ||
6812 | if (h->got.offset != (bfd_vma) - 1 | |
cec5225b | 6813 | && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL) |
a06ea964 NC |
6814 | { |
6815 | Elf_Internal_Rela rela; | |
6816 | bfd_byte *loc; | |
6817 | ||
6818 | /* This symbol has an entry in the global offset table. Set it | |
6819 | up. */ | |
6820 | if (htab->root.sgot == NULL || htab->root.srelgot == NULL) | |
6821 | abort (); | |
6822 | ||
6823 | rela.r_offset = (htab->root.sgot->output_section->vma | |
6824 | + htab->root.sgot->output_offset | |
6825 | + (h->got.offset & ~(bfd_vma) 1)); | |
6826 | ||
49206388 WN |
6827 | if (h->def_regular |
6828 | && h->type == STT_GNU_IFUNC) | |
6829 | { | |
6830 | if (info->shared) | |
6831 | { | |
6832 | /* Generate R_AARCH64_GLOB_DAT. */ | |
6833 | goto do_glob_dat; | |
6834 | } | |
6835 | else | |
6836 | { | |
6837 | asection *plt; | |
6838 | ||
6839 | if (!h->pointer_equality_needed) | |
6840 | abort (); | |
6841 | ||
6842 | /* For non-shared object, we can't use .got.plt, which | |
6843 | contains the real function address if we need pointer | |
6844 | equality. We load the GOT entry with the PLT entry. */ | |
6845 | plt = htab->root.splt ? htab->root.splt : htab->root.iplt; | |
6846 | bfd_put_NN (output_bfd, (plt->output_section->vma | |
6847 | + plt->output_offset | |
6848 | + h->plt.offset), | |
6849 | htab->root.sgot->contents | |
6850 | + (h->got.offset & ~(bfd_vma) 1)); | |
6851 | return TRUE; | |
6852 | } | |
6853 | } | |
6854 | else if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h)) | |
a06ea964 NC |
6855 | { |
6856 | if (!h->def_regular) | |
6857 | return FALSE; | |
6858 | ||
6859 | BFD_ASSERT ((h->got.offset & 1) != 0); | |
a6bb11b2 | 6860 | rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE)); |
a06ea964 NC |
6861 | rela.r_addend = (h->root.u.def.value |
6862 | + h->root.u.def.section->output_section->vma | |
6863 | + h->root.u.def.section->output_offset); | |
6864 | } | |
6865 | else | |
6866 | { | |
49206388 | 6867 | do_glob_dat: |
a06ea964 | 6868 | BFD_ASSERT ((h->got.offset & 1) == 0); |
cec5225b | 6869 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
a06ea964 | 6870 | htab->root.sgot->contents + h->got.offset); |
a6bb11b2 | 6871 | rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT)); |
a06ea964 NC |
6872 | rela.r_addend = 0; |
6873 | } | |
6874 | ||
6875 | loc = htab->root.srelgot->contents; | |
6876 | loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab); | |
cec5225b | 6877 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
a06ea964 NC |
6878 | } |
6879 | ||
6880 | if (h->needs_copy) | |
6881 | { | |
6882 | Elf_Internal_Rela rela; | |
6883 | bfd_byte *loc; | |
6884 | ||
6885 | /* This symbol needs a copy reloc. Set it up. */ | |
6886 | ||
6887 | if (h->dynindx == -1 | |
6888 | || (h->root.type != bfd_link_hash_defined | |
6889 | && h->root.type != bfd_link_hash_defweak) | |
6890 | || htab->srelbss == NULL) | |
6891 | abort (); | |
6892 | ||
6893 | rela.r_offset = (h->root.u.def.value | |
6894 | + h->root.u.def.section->output_section->vma | |
6895 | + h->root.u.def.section->output_offset); | |
a6bb11b2 | 6896 | rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY)); |
a06ea964 NC |
6897 | rela.r_addend = 0; |
6898 | loc = htab->srelbss->contents; | |
6899 | loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab); | |
cec5225b | 6900 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
a06ea964 NC |
6901 | } |
6902 | ||
6903 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may | |
6904 | be NULL for local symbols. */ | |
6905 | if (sym != NULL | |
9637f6ef | 6906 | && (h == elf_hash_table (info)->hdynamic |
a06ea964 NC |
6907 | || h == elf_hash_table (info)->hgot)) |
6908 | sym->st_shndx = SHN_ABS; | |
6909 | ||
6910 | return TRUE; | |
6911 | } | |
6912 | ||
1419bbe5 WN |
6913 | /* Finish up local dynamic symbol handling. We set the contents of |
6914 | various dynamic sections here. */ | |
6915 | ||
6916 | static bfd_boolean | |
6917 | elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf) | |
6918 | { | |
6919 | struct elf_link_hash_entry *h | |
6920 | = (struct elf_link_hash_entry *) *slot; | |
6921 | struct bfd_link_info *info | |
6922 | = (struct bfd_link_info *) inf; | |
6923 | ||
6924 | return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd, | |
6925 | info, h, NULL); | |
6926 | } | |
6927 | ||
a06ea964 | 6928 | static void |
cec5225b YZ |
6929 | elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED, |
6930 | struct elf_aarch64_link_hash_table | |
a06ea964 NC |
6931 | *htab) |
6932 | { | |
6933 | /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between | |
6934 | small and large plts and at the minute just generates | |
6935 | the small PLT. */ | |
6936 | ||
cec5225b | 6937 | /* PLT0 of the small PLT looks like this in ELF64 - |
a06ea964 NC |
6938 | stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack. |
6939 | adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT | |
6940 | ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the | |
6941 | // symbol resolver | |
6942 | add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the | |
6943 | // GOTPLT entry for this. | |
6944 | br x17 | |
cec5225b YZ |
6945 | PLT0 will be slightly different in ELF32 due to different got entry |
6946 | size. | |
a06ea964 | 6947 | */ |
caed7120 | 6948 | bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */ |
a06ea964 NC |
6949 | bfd_vma plt_base; |
6950 | ||
6951 | ||
cec5225b | 6952 | memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry, |
a06ea964 NC |
6953 | PLT_ENTRY_SIZE); |
6954 | elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize = | |
6955 | PLT_ENTRY_SIZE; | |
6956 | ||
caed7120 YZ |
6957 | plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma |
6958 | + htab->root.sgotplt->output_offset | |
6959 | + GOT_ENTRY_SIZE * 2); | |
a06ea964 NC |
6960 | |
6961 | plt_base = htab->root.splt->output_section->vma + | |
6962 | htab->root.splt->output_section->output_offset; | |
6963 | ||
6964 | /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. | |
6965 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ | |
caed7120 YZ |
6966 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
6967 | htab->root.splt->contents + 4, | |
6968 | PG (plt_got_2nd_ent) - PG (plt_base + 4)); | |
a06ea964 | 6969 | |
caed7120 YZ |
6970 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12, |
6971 | htab->root.splt->contents + 8, | |
6972 | PG_OFFSET (plt_got_2nd_ent)); | |
a06ea964 | 6973 | |
caed7120 YZ |
6974 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12, |
6975 | htab->root.splt->contents + 12, | |
6976 | PG_OFFSET (plt_got_2nd_ent)); | |
a06ea964 NC |
6977 | } |
6978 | ||
6979 | static bfd_boolean | |
cec5225b | 6980 | elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd, |
a06ea964 NC |
6981 | struct bfd_link_info *info) |
6982 | { | |
cec5225b | 6983 | struct elf_aarch64_link_hash_table *htab; |
a06ea964 NC |
6984 | bfd *dynobj; |
6985 | asection *sdyn; | |
6986 | ||
cec5225b | 6987 | htab = elf_aarch64_hash_table (info); |
a06ea964 NC |
6988 | dynobj = htab->root.dynobj; |
6989 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); | |
6990 | ||
6991 | if (htab->root.dynamic_sections_created) | |
6992 | { | |
cec5225b | 6993 | ElfNN_External_Dyn *dyncon, *dynconend; |
a06ea964 NC |
6994 | |
6995 | if (sdyn == NULL || htab->root.sgot == NULL) | |
6996 | abort (); | |
6997 | ||
cec5225b YZ |
6998 | dyncon = (ElfNN_External_Dyn *) sdyn->contents; |
6999 | dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size); | |
a06ea964 NC |
7000 | for (; dyncon < dynconend; dyncon++) |
7001 | { | |
7002 | Elf_Internal_Dyn dyn; | |
7003 | asection *s; | |
7004 | ||
cec5225b | 7005 | bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn); |
a06ea964 NC |
7006 | |
7007 | switch (dyn.d_tag) | |
7008 | { | |
7009 | default: | |
7010 | continue; | |
7011 | ||
7012 | case DT_PLTGOT: | |
7013 | s = htab->root.sgotplt; | |
7014 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
7015 | break; | |
7016 | ||
7017 | case DT_JMPREL: | |
7018 | dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma; | |
7019 | break; | |
7020 | ||
7021 | case DT_PLTRELSZ: | |
7022 | s = htab->root.srelplt->output_section; | |
7023 | dyn.d_un.d_val = s->size; | |
7024 | break; | |
7025 | ||
7026 | case DT_RELASZ: | |
7027 | /* The procedure linkage table relocs (DT_JMPREL) should | |
7028 | not be included in the overall relocs (DT_RELA). | |
7029 | Therefore, we override the DT_RELASZ entry here to | |
7030 | make it not include the JMPREL relocs. Since the | |
7031 | linker script arranges for .rela.plt to follow all | |
7032 | other relocation sections, we don't have to worry | |
7033 | about changing the DT_RELA entry. */ | |
7034 | if (htab->root.srelplt != NULL) | |
7035 | { | |
7036 | s = htab->root.srelplt->output_section; | |
7037 | dyn.d_un.d_val -= s->size; | |
7038 | } | |
7039 | break; | |
7040 | ||
7041 | case DT_TLSDESC_PLT: | |
7042 | s = htab->root.splt; | |
7043 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
7044 | + htab->tlsdesc_plt; | |
7045 | break; | |
7046 | ||
7047 | case DT_TLSDESC_GOT: | |
7048 | s = htab->root.sgot; | |
7049 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
7050 | + htab->dt_tlsdesc_got; | |
7051 | break; | |
7052 | } | |
7053 | ||
cec5225b | 7054 | bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon); |
a06ea964 NC |
7055 | } |
7056 | ||
7057 | } | |
7058 | ||
7059 | /* Fill in the special first entry in the procedure linkage table. */ | |
7060 | if (htab->root.splt && htab->root.splt->size > 0) | |
7061 | { | |
cec5225b | 7062 | elfNN_aarch64_init_small_plt0_entry (output_bfd, htab); |
a06ea964 NC |
7063 | |
7064 | elf_section_data (htab->root.splt->output_section)-> | |
7065 | this_hdr.sh_entsize = htab->plt_entry_size; | |
7066 | ||
7067 | ||
7068 | if (htab->tlsdesc_plt) | |
7069 | { | |
cec5225b | 7070 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
a06ea964 NC |
7071 | htab->root.sgot->contents + htab->dt_tlsdesc_got); |
7072 | ||
7073 | memcpy (htab->root.splt->contents + htab->tlsdesc_plt, | |
cec5225b YZ |
7074 | elfNN_aarch64_tlsdesc_small_plt_entry, |
7075 | sizeof (elfNN_aarch64_tlsdesc_small_plt_entry)); | |
a06ea964 NC |
7076 | |
7077 | { | |
7078 | bfd_vma adrp1_addr = | |
7079 | htab->root.splt->output_section->vma | |
7080 | + htab->root.splt->output_offset + htab->tlsdesc_plt + 4; | |
7081 | ||
caed7120 | 7082 | bfd_vma adrp2_addr = adrp1_addr + 4; |
a06ea964 NC |
7083 | |
7084 | bfd_vma got_addr = | |
7085 | htab->root.sgot->output_section->vma | |
7086 | + htab->root.sgot->output_offset; | |
7087 | ||
7088 | bfd_vma pltgot_addr = | |
7089 | htab->root.sgotplt->output_section->vma | |
7090 | + htab->root.sgotplt->output_offset; | |
7091 | ||
7092 | bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got; | |
caed7120 YZ |
7093 | |
7094 | bfd_byte *plt_entry = | |
7095 | htab->root.splt->contents + htab->tlsdesc_plt; | |
a06ea964 NC |
7096 | |
7097 | /* adrp x2, DT_TLSDESC_GOT */ | |
caed7120 YZ |
7098 | elf_aarch64_update_plt_entry (output_bfd, |
7099 | BFD_RELOC_AARCH64_ADR_HI21_PCREL, | |
7100 | plt_entry + 4, | |
7101 | (PG (dt_tlsdesc_got) | |
7102 | - PG (adrp1_addr))); | |
a06ea964 NC |
7103 | |
7104 | /* adrp x3, 0 */ | |
caed7120 YZ |
7105 | elf_aarch64_update_plt_entry (output_bfd, |
7106 | BFD_RELOC_AARCH64_ADR_HI21_PCREL, | |
7107 | plt_entry + 8, | |
7108 | (PG (pltgot_addr) | |
7109 | - PG (adrp2_addr))); | |
a06ea964 NC |
7110 | |
7111 | /* ldr x2, [x2, #0] */ | |
caed7120 YZ |
7112 | elf_aarch64_update_plt_entry (output_bfd, |
7113 | BFD_RELOC_AARCH64_LDSTNN_LO12, | |
7114 | plt_entry + 12, | |
7115 | PG_OFFSET (dt_tlsdesc_got)); | |
a06ea964 NC |
7116 | |
7117 | /* add x3, x3, 0 */ | |
caed7120 YZ |
7118 | elf_aarch64_update_plt_entry (output_bfd, |
7119 | BFD_RELOC_AARCH64_ADD_LO12, | |
7120 | plt_entry + 16, | |
7121 | PG_OFFSET (pltgot_addr)); | |
a06ea964 NC |
7122 | } |
7123 | } | |
7124 | } | |
7125 | ||
7126 | if (htab->root.sgotplt) | |
7127 | { | |
7128 | if (bfd_is_abs_section (htab->root.sgotplt->output_section)) | |
7129 | { | |
7130 | (*_bfd_error_handler) | |
7131 | (_("discarded output section: `%A'"), htab->root.sgotplt); | |
7132 | return FALSE; | |
7133 | } | |
7134 | ||
7135 | /* Fill in the first three entries in the global offset table. */ | |
7136 | if (htab->root.sgotplt->size > 0) | |
7137 | { | |
8db339a6 MS |
7138 | bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents); |
7139 | ||
a06ea964 | 7140 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
cec5225b | 7141 | bfd_put_NN (output_bfd, |
a06ea964 NC |
7142 | (bfd_vma) 0, |
7143 | htab->root.sgotplt->contents + GOT_ENTRY_SIZE); | |
cec5225b | 7144 | bfd_put_NN (output_bfd, |
a06ea964 NC |
7145 | (bfd_vma) 0, |
7146 | htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2); | |
7147 | } | |
7148 | ||
8db339a6 MS |
7149 | if (htab->root.sgot) |
7150 | { | |
7151 | if (htab->root.sgot->size > 0) | |
7152 | { | |
7153 | bfd_vma addr = | |
7154 | sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0; | |
7155 | bfd_put_NN (output_bfd, addr, htab->root.sgot->contents); | |
7156 | } | |
7157 | } | |
7158 | ||
a06ea964 NC |
7159 | elf_section_data (htab->root.sgotplt->output_section)-> |
7160 | this_hdr.sh_entsize = GOT_ENTRY_SIZE; | |
7161 | } | |
7162 | ||
7163 | if (htab->root.sgot && htab->root.sgot->size > 0) | |
7164 | elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize | |
7165 | = GOT_ENTRY_SIZE; | |
7166 | ||
1419bbe5 WN |
7167 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
7168 | htab_traverse (htab->loc_hash_table, | |
7169 | elfNN_aarch64_finish_local_dynamic_symbol, | |
7170 | info); | |
7171 | ||
a06ea964 NC |
7172 | return TRUE; |
7173 | } | |
7174 | ||
7175 | /* Return address for Ith PLT stub in section PLT, for relocation REL | |
7176 | or (bfd_vma) -1 if it should not be included. */ | |
7177 | ||
7178 | static bfd_vma | |
cec5225b | 7179 | elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt, |
a06ea964 NC |
7180 | const arelent *rel ATTRIBUTE_UNUSED) |
7181 | { | |
7182 | return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE; | |
7183 | } | |
7184 | ||
7185 | ||
7186 | /* We use this so we can override certain functions | |
7187 | (though currently we don't). */ | |
7188 | ||
cec5225b | 7189 | const struct elf_size_info elfNN_aarch64_size_info = |
a06ea964 | 7190 | { |
cec5225b YZ |
7191 | sizeof (ElfNN_External_Ehdr), |
7192 | sizeof (ElfNN_External_Phdr), | |
7193 | sizeof (ElfNN_External_Shdr), | |
7194 | sizeof (ElfNN_External_Rel), | |
7195 | sizeof (ElfNN_External_Rela), | |
7196 | sizeof (ElfNN_External_Sym), | |
7197 | sizeof (ElfNN_External_Dyn), | |
a06ea964 NC |
7198 | sizeof (Elf_External_Note), |
7199 | 4, /* Hash table entry size. */ | |
7200 | 1, /* Internal relocs per external relocs. */ | |
cec5225b YZ |
7201 | ARCH_SIZE, /* Arch size. */ |
7202 | LOG_FILE_ALIGN, /* Log_file_align. */ | |
7203 | ELFCLASSNN, EV_CURRENT, | |
7204 | bfd_elfNN_write_out_phdrs, | |
7205 | bfd_elfNN_write_shdrs_and_ehdr, | |
7206 | bfd_elfNN_checksum_contents, | |
7207 | bfd_elfNN_write_relocs, | |
7208 | bfd_elfNN_swap_symbol_in, | |
7209 | bfd_elfNN_swap_symbol_out, | |
7210 | bfd_elfNN_slurp_reloc_table, | |
7211 | bfd_elfNN_slurp_symbol_table, | |
7212 | bfd_elfNN_swap_dyn_in, | |
7213 | bfd_elfNN_swap_dyn_out, | |
7214 | bfd_elfNN_swap_reloc_in, | |
7215 | bfd_elfNN_swap_reloc_out, | |
7216 | bfd_elfNN_swap_reloca_in, | |
7217 | bfd_elfNN_swap_reloca_out | |
a06ea964 NC |
7218 | }; |
7219 | ||
7220 | #define ELF_ARCH bfd_arch_aarch64 | |
7221 | #define ELF_MACHINE_CODE EM_AARCH64 | |
7222 | #define ELF_MAXPAGESIZE 0x10000 | |
7223 | #define ELF_MINPAGESIZE 0x1000 | |
7224 | #define ELF_COMMONPAGESIZE 0x1000 | |
7225 | ||
cec5225b YZ |
7226 | #define bfd_elfNN_close_and_cleanup \ |
7227 | elfNN_aarch64_close_and_cleanup | |
a06ea964 | 7228 | |
cec5225b YZ |
7229 | #define bfd_elfNN_bfd_copy_private_bfd_data \ |
7230 | elfNN_aarch64_copy_private_bfd_data | |
a06ea964 | 7231 | |
cec5225b YZ |
7232 | #define bfd_elfNN_bfd_free_cached_info \ |
7233 | elfNN_aarch64_bfd_free_cached_info | |
a06ea964 | 7234 | |
cec5225b YZ |
7235 | #define bfd_elfNN_bfd_is_target_special_symbol \ |
7236 | elfNN_aarch64_is_target_special_symbol | |
a06ea964 | 7237 | |
cec5225b YZ |
7238 | #define bfd_elfNN_bfd_link_hash_table_create \ |
7239 | elfNN_aarch64_link_hash_table_create | |
a06ea964 | 7240 | |
cec5225b YZ |
7241 | #define bfd_elfNN_bfd_link_hash_table_free \ |
7242 | elfNN_aarch64_hash_table_free | |
a06ea964 | 7243 | |
cec5225b YZ |
7244 | #define bfd_elfNN_bfd_merge_private_bfd_data \ |
7245 | elfNN_aarch64_merge_private_bfd_data | |
a06ea964 | 7246 | |
cec5225b YZ |
7247 | #define bfd_elfNN_bfd_print_private_bfd_data \ |
7248 | elfNN_aarch64_print_private_bfd_data | |
a06ea964 | 7249 | |
cec5225b YZ |
7250 | #define bfd_elfNN_bfd_reloc_type_lookup \ |
7251 | elfNN_aarch64_reloc_type_lookup | |
a06ea964 | 7252 | |
cec5225b YZ |
7253 | #define bfd_elfNN_bfd_reloc_name_lookup \ |
7254 | elfNN_aarch64_reloc_name_lookup | |
a06ea964 | 7255 | |
cec5225b YZ |
7256 | #define bfd_elfNN_bfd_set_private_flags \ |
7257 | elfNN_aarch64_set_private_flags | |
a06ea964 | 7258 | |
cec5225b YZ |
7259 | #define bfd_elfNN_find_inliner_info \ |
7260 | elfNN_aarch64_find_inliner_info | |
a06ea964 | 7261 | |
cec5225b YZ |
7262 | #define bfd_elfNN_find_nearest_line \ |
7263 | elfNN_aarch64_find_nearest_line | |
a06ea964 | 7264 | |
cec5225b YZ |
7265 | #define bfd_elfNN_mkobject \ |
7266 | elfNN_aarch64_mkobject | |
a06ea964 | 7267 | |
cec5225b YZ |
7268 | #define bfd_elfNN_new_section_hook \ |
7269 | elfNN_aarch64_new_section_hook | |
a06ea964 NC |
7270 | |
7271 | #define elf_backend_adjust_dynamic_symbol \ | |
cec5225b | 7272 | elfNN_aarch64_adjust_dynamic_symbol |
a06ea964 NC |
7273 | |
7274 | #define elf_backend_always_size_sections \ | |
cec5225b | 7275 | elfNN_aarch64_always_size_sections |
a06ea964 NC |
7276 | |
7277 | #define elf_backend_check_relocs \ | |
cec5225b | 7278 | elfNN_aarch64_check_relocs |
a06ea964 NC |
7279 | |
7280 | #define elf_backend_copy_indirect_symbol \ | |
cec5225b | 7281 | elfNN_aarch64_copy_indirect_symbol |
a06ea964 NC |
7282 | |
7283 | /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts | |
7284 | to them in our hash. */ | |
7285 | #define elf_backend_create_dynamic_sections \ | |
cec5225b | 7286 | elfNN_aarch64_create_dynamic_sections |
a06ea964 NC |
7287 | |
7288 | #define elf_backend_init_index_section \ | |
7289 | _bfd_elf_init_2_index_sections | |
7290 | ||
a06ea964 | 7291 | #define elf_backend_finish_dynamic_sections \ |
cec5225b | 7292 | elfNN_aarch64_finish_dynamic_sections |
a06ea964 NC |
7293 | |
7294 | #define elf_backend_finish_dynamic_symbol \ | |
cec5225b | 7295 | elfNN_aarch64_finish_dynamic_symbol |
a06ea964 NC |
7296 | |
7297 | #define elf_backend_gc_sweep_hook \ | |
cec5225b | 7298 | elfNN_aarch64_gc_sweep_hook |
a06ea964 NC |
7299 | |
7300 | #define elf_backend_object_p \ | |
cec5225b | 7301 | elfNN_aarch64_object_p |
a06ea964 NC |
7302 | |
7303 | #define elf_backend_output_arch_local_syms \ | |
cec5225b | 7304 | elfNN_aarch64_output_arch_local_syms |
a06ea964 NC |
7305 | |
7306 | #define elf_backend_plt_sym_val \ | |
cec5225b | 7307 | elfNN_aarch64_plt_sym_val |
a06ea964 NC |
7308 | |
7309 | #define elf_backend_post_process_headers \ | |
cec5225b | 7310 | elfNN_aarch64_post_process_headers |
a06ea964 NC |
7311 | |
7312 | #define elf_backend_relocate_section \ | |
cec5225b | 7313 | elfNN_aarch64_relocate_section |
a06ea964 NC |
7314 | |
7315 | #define elf_backend_reloc_type_class \ | |
cec5225b | 7316 | elfNN_aarch64_reloc_type_class |
a06ea964 NC |
7317 | |
7318 | #define elf_backend_section_flags \ | |
cec5225b | 7319 | elfNN_aarch64_section_flags |
a06ea964 NC |
7320 | |
7321 | #define elf_backend_section_from_shdr \ | |
cec5225b | 7322 | elfNN_aarch64_section_from_shdr |
a06ea964 NC |
7323 | |
7324 | #define elf_backend_size_dynamic_sections \ | |
cec5225b | 7325 | elfNN_aarch64_size_dynamic_sections |
a06ea964 NC |
7326 | |
7327 | #define elf_backend_size_info \ | |
cec5225b | 7328 | elfNN_aarch64_size_info |
a06ea964 NC |
7329 | |
7330 | #define elf_backend_can_refcount 1 | |
59c108f7 | 7331 | #define elf_backend_can_gc_sections 1 |
a06ea964 NC |
7332 | #define elf_backend_plt_readonly 1 |
7333 | #define elf_backend_want_got_plt 1 | |
7334 | #define elf_backend_want_plt_sym 0 | |
7335 | #define elf_backend_may_use_rel_p 0 | |
7336 | #define elf_backend_may_use_rela_p 1 | |
7337 | #define elf_backend_default_use_rela_p 1 | |
7338 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3) | |
c495064d | 7339 | #define elf_backend_default_execstack 0 |
a06ea964 NC |
7340 | |
7341 | #undef elf_backend_obj_attrs_section | |
7342 | #define elf_backend_obj_attrs_section ".ARM.attributes" | |
7343 | ||
cec5225b | 7344 | #include "elfNN-target.h" |