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a06ea964 NC |
1 | /* ELF support for AArch64. |
2 | Copyright 2009, 2010, 2011, 2012 Free Software Foundation, Inc. | |
3 | Contributed by ARM Ltd. | |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; see the file COPYING3. If not, | |
19 | see <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | /* Notes on implementation: | |
22 | ||
23 | Thread Local Store (TLS) | |
24 | ||
25 | Overview: | |
26 | ||
27 | The implementation currently supports both traditional TLS and TLS | |
28 | descriptors, but only general dynamic (GD). | |
29 | ||
30 | For traditional TLS the assembler will present us with code | |
31 | fragments of the form: | |
32 | ||
33 | adrp x0, :tlsgd:foo | |
34 | R_AARCH64_TLSGD_ADR_PAGE21(foo) | |
35 | add x0, :tlsgd_lo12:foo | |
36 | R_AARCH64_TLSGD_ADD_LO12_NC(foo) | |
37 | bl __tls_get_addr | |
38 | nop | |
39 | ||
40 | For TLS descriptors the assembler will present us with code | |
41 | fragments of the form: | |
42 | ||
43 | adrp x0, :tlsdesc:foo R_AARCH64_TLSDESC_ADR_PAGE(foo) | |
44 | ldr x1, [x0, #:tlsdesc_lo12:foo] R_AARCH64_TLSDESC_LD64_LO12(foo) | |
45 | add x0, x0, #:tlsdesc_lo12:foo R_AARCH64_TLSDESC_ADD_LO12(foo) | |
46 | .tlsdesccall foo | |
47 | blr x1 R_AARCH64_TLSDESC_CALL(foo) | |
48 | ||
49 | The relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} against foo | |
50 | indicate that foo is thread local and should be accessed via the | |
51 | traditional TLS mechanims. | |
52 | ||
53 | The relocations R_AARCH64_TLSDESC_{ADR_PAGE,LD64_LO12_NC,ADD_LO12_NC} | |
54 | against foo indicate that 'foo' is thread local and should be accessed | |
55 | via a TLS descriptor mechanism. | |
56 | ||
57 | The precise instruction sequence is only relevant from the | |
58 | perspective of linker relaxation which is currently not implemented. | |
59 | ||
60 | The static linker must detect that 'foo' is a TLS object and | |
61 | allocate a double GOT entry. The GOT entry must be created for both | |
62 | global and local TLS symbols. Note that this is different to none | |
63 | TLS local objects which do not need a GOT entry. | |
64 | ||
65 | In the traditional TLS mechanism, the double GOT entry is used to | |
66 | provide the tls_index structure, containing module and offset | |
67 | entries. The static linker places the relocation R_AARCH64_TLS_DTPMOD64 | |
68 | on the module entry. The loader will subsequently fixup this | |
69 | relocation with the module identity. | |
70 | ||
71 | For global traditional TLS symbols the static linker places an | |
72 | R_AARCH64_TLS_DTPREL64 relocation on the offset entry. The loader | |
73 | will subsequently fixup the offset. For local TLS symbols the static | |
74 | linker fixes up offset. | |
75 | ||
76 | In the TLS descriptor mechanism the double GOT entry is used to | |
77 | provide the descriptor. The static linker places the relocation | |
78 | R_AARCH64_TLSDESC on the first GOT slot. The loader will | |
79 | subsequently fix this up. | |
80 | ||
81 | Implementation: | |
82 | ||
83 | The handling of TLS symbols is implemented across a number of | |
84 | different backend functions. The following is a top level view of | |
85 | what processing is performed where. | |
86 | ||
87 | The TLS implementation maintains state information for each TLS | |
88 | symbol. The state information for local and global symbols is kept | |
89 | in different places. Global symbols use generic BFD structures while | |
90 | local symbols use backend specific structures that are allocated and | |
91 | maintained entirely by the backend. | |
92 | ||
93 | The flow: | |
94 | ||
95 | aarch64_check_relocs() | |
96 | ||
97 | This function is invoked for each relocation. | |
98 | ||
99 | The TLS relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} and | |
100 | R_AARCH64_TLSDESC_{ADR_PAGE,LD64_LO12_NC,ADD_LO12_NC} are | |
101 | spotted. One time creation of local symbol data structures are | |
102 | created when the first local symbol is seen. | |
103 | ||
104 | The reference count for a symbol is incremented. The GOT type for | |
105 | each symbol is marked as general dynamic. | |
106 | ||
107 | elf64_aarch64_allocate_dynrelocs () | |
108 | ||
109 | For each global with positive reference count we allocate a double | |
110 | GOT slot. For a traditional TLS symbol we allocate space for two | |
111 | relocation entries on the GOT, for a TLS descriptor symbol we | |
112 | allocate space for one relocation on the slot. Record the GOT offset | |
113 | for this symbol. | |
114 | ||
115 | elf64_aarch64_size_dynamic_sections () | |
116 | ||
117 | Iterate all input BFDS, look for in the local symbol data structure | |
118 | constructed earlier for local TLS symbols and allocate them double | |
119 | GOT slots along with space for a single GOT relocation. Update the | |
120 | local symbol structure to record the GOT offset allocated. | |
121 | ||
122 | elf64_aarch64_relocate_section () | |
123 | ||
124 | Calls elf64_aarch64_final_link_relocate () | |
125 | ||
126 | Emit the relevant TLS relocations against the GOT for each TLS | |
127 | symbol. For local TLS symbols emit the GOT offset directly. The GOT | |
128 | relocations are emitted once the first time a TLS symbol is | |
129 | encountered. The implementation uses the LSB of the GOT offset to | |
130 | flag that the relevant GOT relocations for a symbol have been | |
131 | emitted. All of the TLS code that uses the GOT offset needs to take | |
132 | care to mask out this flag bit before using the offset. | |
133 | ||
134 | elf64_aarch64_final_link_relocate () | |
135 | ||
136 | Fixup the R_AARCH64_TLSGD_{ADR_PREL21, ADD_LO12_NC} relocations. */ | |
137 | ||
138 | #include "sysdep.h" | |
139 | #include "bfd.h" | |
140 | #include "libiberty.h" | |
141 | #include "libbfd.h" | |
142 | #include "bfd_stdint.h" | |
143 | #include "elf-bfd.h" | |
144 | #include "bfdlink.h" | |
145 | #include "elf/aarch64.h" | |
146 | ||
147 | static bfd_reloc_status_type | |
148 | bfd_elf_aarch64_put_addend (bfd *abfd, | |
149 | bfd_byte *address, | |
150 | reloc_howto_type *howto, bfd_signed_vma addend); | |
151 | ||
152 | #define IS_AARCH64_TLS_RELOC(R_TYPE) \ | |
153 | ((R_TYPE) == R_AARCH64_TLSGD_ADR_PAGE21 \ | |
154 | || (R_TYPE) == R_AARCH64_TLSGD_ADD_LO12_NC \ | |
155 | || (R_TYPE) == R_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \ | |
156 | || (R_TYPE) == R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \ | |
157 | || (R_TYPE) == R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \ | |
158 | || (R_TYPE) == R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \ | |
159 | || (R_TYPE) == R_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \ | |
160 | || (R_TYPE) == R_AARCH64_TLSLE_ADD_TPREL_LO12 \ | |
161 | || (R_TYPE) == R_AARCH64_TLSLE_ADD_TPREL_HI12 \ | |
162 | || (R_TYPE) == R_AARCH64_TLSLE_ADD_TPREL_LO12_NC \ | |
163 | || (R_TYPE) == R_AARCH64_TLSLE_MOVW_TPREL_G2 \ | |
164 | || (R_TYPE) == R_AARCH64_TLSLE_MOVW_TPREL_G1 \ | |
165 | || (R_TYPE) == R_AARCH64_TLSLE_MOVW_TPREL_G1_NC \ | |
166 | || (R_TYPE) == R_AARCH64_TLSLE_MOVW_TPREL_G0 \ | |
167 | || (R_TYPE) == R_AARCH64_TLSLE_MOVW_TPREL_G0_NC \ | |
168 | || (R_TYPE) == R_AARCH64_TLS_DTPMOD64 \ | |
169 | || (R_TYPE) == R_AARCH64_TLS_DTPREL64 \ | |
170 | || (R_TYPE) == R_AARCH64_TLS_TPREL64 \ | |
171 | || IS_AARCH64_TLSDESC_RELOC ((R_TYPE))) | |
172 | ||
173 | #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \ | |
174 | ((R_TYPE) == R_AARCH64_TLSDESC_LD64_PREL19 \ | |
175 | || (R_TYPE) == R_AARCH64_TLSDESC_ADR_PREL21 \ | |
176 | || (R_TYPE) == R_AARCH64_TLSDESC_ADR_PAGE \ | |
177 | || (R_TYPE) == R_AARCH64_TLSDESC_ADD_LO12_NC \ | |
178 | || (R_TYPE) == R_AARCH64_TLSDESC_LD64_LO12_NC \ | |
179 | || (R_TYPE) == R_AARCH64_TLSDESC_OFF_G1 \ | |
180 | || (R_TYPE) == R_AARCH64_TLSDESC_OFF_G0_NC \ | |
181 | || (R_TYPE) == R_AARCH64_TLSDESC_LDR \ | |
182 | || (R_TYPE) == R_AARCH64_TLSDESC_ADD \ | |
183 | || (R_TYPE) == R_AARCH64_TLSDESC_CALL \ | |
184 | || (R_TYPE) == R_AARCH64_TLSDESC) | |
185 | ||
186 | #define ELIMINATE_COPY_RELOCS 0 | |
187 | ||
188 | /* Return the relocation section associated with NAME. HTAB is the | |
189 | bfd's elf64_aarch64_link_hash_entry. */ | |
190 | #define RELOC_SECTION(HTAB, NAME) \ | |
191 | ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME) | |
192 | ||
193 | /* Return size of a relocation entry. HTAB is the bfd's | |
194 | elf64_aarch64_link_hash_entry. */ | |
195 | #define RELOC_SIZE(HTAB) (sizeof (Elf64_External_Rela)) | |
196 | ||
197 | /* Return function to swap relocations in. HTAB is the bfd's | |
198 | elf64_aarch64_link_hash_entry. */ | |
199 | #define SWAP_RELOC_IN(HTAB) (bfd_elf64_swap_reloca_in) | |
200 | ||
201 | /* Return function to swap relocations out. HTAB is the bfd's | |
202 | elf64_aarch64_link_hash_entry. */ | |
203 | #define SWAP_RELOC_OUT(HTAB) (bfd_elf64_swap_reloca_out) | |
204 | ||
205 | /* GOT Entry size - 8 bytes. */ | |
206 | #define GOT_ENTRY_SIZE (8) | |
207 | #define PLT_ENTRY_SIZE (32) | |
208 | #define PLT_SMALL_ENTRY_SIZE (16) | |
209 | #define PLT_TLSDESC_ENTRY_SIZE (32) | |
210 | ||
211 | /* Take the PAGE component of an address or offset. */ | |
212 | #define PG(x) ((x) & ~ 0xfff) | |
213 | #define PG_OFFSET(x) ((x) & 0xfff) | |
214 | ||
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 | |
226 | [x16,#-8]. */ | |
227 | static const bfd_byte elf64_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] = | |
228 | { | |
229 | 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */ | |
230 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */ | |
231 | 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */ | |
232 | 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */ | |
233 | 0x20, 0x02, 0x1f, 0xd6, /* br x17 */ | |
234 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
235 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
236 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
237 | }; | |
238 | ||
239 | /* Per function entry in a procedure linkage table looks like this | |
240 | if the distance between the PLTGOT and the PLT is < 4GB use | |
241 | these PLT entries. */ | |
242 | static const bfd_byte elf64_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] = | |
243 | { | |
244 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */ | |
245 | 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */ | |
246 | 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */ | |
247 | 0x20, 0x02, 0x1f, 0xd6, /* br x17. */ | |
248 | }; | |
249 | ||
250 | static const bfd_byte | |
251 | elf64_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] = | |
252 | { | |
253 | 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */ | |
254 | 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */ | |
255 | 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */ | |
256 | 0x42, 0x08, 0x40, 0xF9, /* ldr x2, [x2, #0] */ | |
257 | 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */ | |
258 | 0x40, 0x00, 0x1F, 0xD6, /* br x2 */ | |
259 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
260 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ | |
261 | }; | |
262 | ||
263 | #define elf_info_to_howto elf64_aarch64_info_to_howto | |
264 | #define elf_info_to_howto_rel elf64_aarch64_info_to_howto | |
265 | ||
266 | #define AARCH64_ELF_ABI_VERSION 0 | |
267 | #define AARCH64_ELF_OS_ABI_VERSION 0 | |
268 | ||
269 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ | |
270 | #define ALL_ONES (~ (bfd_vma) 0) | |
271 | ||
272 | static reloc_howto_type elf64_aarch64_howto_none = | |
273 | HOWTO (R_AARCH64_NONE, /* type */ | |
274 | 0, /* rightshift */ | |
275 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
276 | 0, /* bitsize */ | |
277 | FALSE, /* pc_relative */ | |
278 | 0, /* bitpos */ | |
279 | complain_overflow_dont,/* complain_on_overflow */ | |
280 | bfd_elf_generic_reloc, /* special_function */ | |
281 | "R_AARCH64_NONE", /* name */ | |
282 | FALSE, /* partial_inplace */ | |
283 | 0, /* src_mask */ | |
284 | 0, /* dst_mask */ | |
285 | FALSE); /* pcrel_offset */ | |
286 | ||
287 | static reloc_howto_type elf64_aarch64_howto_dynrelocs[] = | |
288 | { | |
289 | HOWTO (R_AARCH64_COPY, /* type */ | |
290 | 0, /* rightshift */ | |
291 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
292 | 64, /* bitsize */ | |
293 | FALSE, /* pc_relative */ | |
294 | 0, /* bitpos */ | |
295 | complain_overflow_bitfield, /* complain_on_overflow */ | |
296 | bfd_elf_generic_reloc, /* special_function */ | |
297 | "R_AARCH64_COPY", /* name */ | |
298 | TRUE, /* partial_inplace */ | |
299 | 0xffffffff, /* src_mask */ | |
300 | 0xffffffff, /* dst_mask */ | |
301 | FALSE), /* pcrel_offset */ | |
302 | ||
303 | HOWTO (R_AARCH64_GLOB_DAT, /* type */ | |
304 | 0, /* rightshift */ | |
305 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
306 | 64, /* bitsize */ | |
307 | FALSE, /* pc_relative */ | |
308 | 0, /* bitpos */ | |
309 | complain_overflow_bitfield, /* complain_on_overflow */ | |
310 | bfd_elf_generic_reloc, /* special_function */ | |
311 | "R_AARCH64_GLOB_DAT", /* name */ | |
312 | TRUE, /* partial_inplace */ | |
313 | 0xffffffff, /* src_mask */ | |
314 | 0xffffffff, /* dst_mask */ | |
315 | FALSE), /* pcrel_offset */ | |
316 | ||
317 | HOWTO (R_AARCH64_JUMP_SLOT, /* type */ | |
318 | 0, /* rightshift */ | |
319 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
320 | 64, /* bitsize */ | |
321 | FALSE, /* pc_relative */ | |
322 | 0, /* bitpos */ | |
323 | complain_overflow_bitfield, /* complain_on_overflow */ | |
324 | bfd_elf_generic_reloc, /* special_function */ | |
325 | "R_AARCH64_JUMP_SLOT", /* name */ | |
326 | TRUE, /* partial_inplace */ | |
327 | 0xffffffff, /* src_mask */ | |
328 | 0xffffffff, /* dst_mask */ | |
329 | FALSE), /* pcrel_offset */ | |
330 | ||
331 | HOWTO (R_AARCH64_RELATIVE, /* type */ | |
332 | 0, /* rightshift */ | |
333 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
334 | 64, /* bitsize */ | |
335 | FALSE, /* pc_relative */ | |
336 | 0, /* bitpos */ | |
337 | complain_overflow_bitfield, /* complain_on_overflow */ | |
338 | bfd_elf_generic_reloc, /* special_function */ | |
339 | "R_AARCH64_RELATIVE", /* name */ | |
340 | TRUE, /* partial_inplace */ | |
341 | ALL_ONES, /* src_mask */ | |
342 | ALL_ONES, /* dst_mask */ | |
343 | FALSE), /* pcrel_offset */ | |
344 | ||
345 | HOWTO (R_AARCH64_TLS_DTPMOD64, /* type */ | |
346 | 0, /* rightshift */ | |
347 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
348 | 64, /* bitsize */ | |
349 | FALSE, /* pc_relative */ | |
350 | 0, /* bitpos */ | |
351 | complain_overflow_dont, /* complain_on_overflow */ | |
352 | bfd_elf_generic_reloc, /* special_function */ | |
353 | "R_AARCH64_TLS_DTPMOD64", /* name */ | |
354 | FALSE, /* partial_inplace */ | |
355 | 0, /* src_mask */ | |
356 | ALL_ONES, /* dst_mask */ | |
357 | FALSE), /* pc_reloffset */ | |
358 | ||
359 | HOWTO (R_AARCH64_TLS_DTPREL64, /* type */ | |
360 | 0, /* rightshift */ | |
361 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
362 | 64, /* bitsize */ | |
363 | FALSE, /* pc_relative */ | |
364 | 0, /* bitpos */ | |
365 | complain_overflow_dont, /* complain_on_overflow */ | |
366 | bfd_elf_generic_reloc, /* special_function */ | |
367 | "R_AARCH64_TLS_DTPREL64", /* name */ | |
368 | FALSE, /* partial_inplace */ | |
369 | 0, /* src_mask */ | |
370 | ALL_ONES, /* dst_mask */ | |
371 | FALSE), /* pcrel_offset */ | |
372 | ||
373 | HOWTO (R_AARCH64_TLS_TPREL64, /* type */ | |
374 | 0, /* rightshift */ | |
375 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
376 | 64, /* bitsize */ | |
377 | FALSE, /* pc_relative */ | |
378 | 0, /* bitpos */ | |
379 | complain_overflow_dont, /* complain_on_overflow */ | |
380 | bfd_elf_generic_reloc, /* special_function */ | |
381 | "R_AARCH64_TLS_TPREL64", /* name */ | |
382 | FALSE, /* partial_inplace */ | |
383 | 0, /* src_mask */ | |
384 | ALL_ONES, /* dst_mask */ | |
385 | FALSE), /* pcrel_offset */ | |
386 | ||
387 | HOWTO (R_AARCH64_TLSDESC, /* type */ | |
388 | 0, /* rightshift */ | |
389 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
390 | 64, /* bitsize */ | |
391 | FALSE, /* pc_relative */ | |
392 | 0, /* bitpos */ | |
393 | complain_overflow_dont, /* complain_on_overflow */ | |
394 | bfd_elf_generic_reloc, /* special_function */ | |
395 | "R_AARCH64_TLSDESC", /* name */ | |
396 | FALSE, /* partial_inplace */ | |
397 | 0, /* src_mask */ | |
398 | ALL_ONES, /* dst_mask */ | |
399 | FALSE), /* pcrel_offset */ | |
400 | ||
401 | }; | |
402 | ||
403 | /* Note: code such as elf64_aarch64_reloc_type_lookup expect to use e.g. | |
404 | R_AARCH64_PREL64 as an index into this, and find the R_AARCH64_PREL64 HOWTO | |
405 | in that slot. */ | |
406 | ||
407 | static reloc_howto_type elf64_aarch64_howto_table[] = | |
408 | { | |
409 | /* Basic data relocations. */ | |
410 | ||
411 | HOWTO (R_AARCH64_NULL, /* type */ | |
412 | 0, /* rightshift */ | |
413 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
414 | 0, /* bitsize */ | |
415 | FALSE, /* pc_relative */ | |
416 | 0, /* bitpos */ | |
417 | complain_overflow_dont, /* complain_on_overflow */ | |
418 | bfd_elf_generic_reloc, /* special_function */ | |
419 | "R_AARCH64_NULL", /* name */ | |
420 | FALSE, /* partial_inplace */ | |
421 | 0, /* src_mask */ | |
422 | 0, /* dst_mask */ | |
423 | FALSE), /* pcrel_offset */ | |
424 | ||
425 | /* .xword: (S+A) */ | |
426 | HOWTO (R_AARCH64_ABS64, /* type */ | |
427 | 0, /* rightshift */ | |
428 | 4, /* size (4 = long long) */ | |
429 | 64, /* bitsize */ | |
430 | FALSE, /* pc_relative */ | |
431 | 0, /* bitpos */ | |
432 | complain_overflow_unsigned, /* complain_on_overflow */ | |
433 | bfd_elf_generic_reloc, /* special_function */ | |
434 | "R_AARCH64_ABS64", /* name */ | |
435 | FALSE, /* partial_inplace */ | |
436 | ALL_ONES, /* src_mask */ | |
437 | ALL_ONES, /* dst_mask */ | |
438 | FALSE), /* pcrel_offset */ | |
439 | ||
440 | /* .word: (S+A) */ | |
441 | HOWTO (R_AARCH64_ABS32, /* type */ | |
442 | 0, /* rightshift */ | |
443 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
444 | 32, /* bitsize */ | |
445 | FALSE, /* pc_relative */ | |
446 | 0, /* bitpos */ | |
447 | complain_overflow_unsigned, /* complain_on_overflow */ | |
448 | bfd_elf_generic_reloc, /* special_function */ | |
449 | "R_AARCH64_ABS32", /* name */ | |
450 | FALSE, /* partial_inplace */ | |
451 | 0xffffffff, /* src_mask */ | |
452 | 0xffffffff, /* dst_mask */ | |
453 | FALSE), /* pcrel_offset */ | |
454 | ||
455 | /* .half: (S+A) */ | |
456 | HOWTO (R_AARCH64_ABS16, /* type */ | |
457 | 0, /* rightshift */ | |
458 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
459 | 16, /* bitsize */ | |
460 | FALSE, /* pc_relative */ | |
461 | 0, /* bitpos */ | |
462 | complain_overflow_unsigned, /* complain_on_overflow */ | |
463 | bfd_elf_generic_reloc, /* special_function */ | |
464 | "R_AARCH64_ABS16", /* name */ | |
465 | FALSE, /* partial_inplace */ | |
466 | 0xffff, /* src_mask */ | |
467 | 0xffff, /* dst_mask */ | |
468 | FALSE), /* pcrel_offset */ | |
469 | ||
470 | /* .xword: (S+A-P) */ | |
471 | HOWTO (R_AARCH64_PREL64, /* type */ | |
472 | 0, /* rightshift */ | |
473 | 4, /* size (4 = long long) */ | |
474 | 64, /* bitsize */ | |
475 | TRUE, /* pc_relative */ | |
476 | 0, /* bitpos */ | |
477 | complain_overflow_signed, /* complain_on_overflow */ | |
478 | bfd_elf_generic_reloc, /* special_function */ | |
479 | "R_AARCH64_PREL64", /* name */ | |
480 | FALSE, /* partial_inplace */ | |
481 | ALL_ONES, /* src_mask */ | |
482 | ALL_ONES, /* dst_mask */ | |
483 | TRUE), /* pcrel_offset */ | |
484 | ||
485 | /* .word: (S+A-P) */ | |
486 | HOWTO (R_AARCH64_PREL32, /* type */ | |
487 | 0, /* rightshift */ | |
488 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
489 | 32, /* bitsize */ | |
490 | TRUE, /* pc_relative */ | |
491 | 0, /* bitpos */ | |
492 | complain_overflow_signed, /* complain_on_overflow */ | |
493 | bfd_elf_generic_reloc, /* special_function */ | |
494 | "R_AARCH64_PREL32", /* name */ | |
495 | FALSE, /* partial_inplace */ | |
496 | 0xffffffff, /* src_mask */ | |
497 | 0xffffffff, /* dst_mask */ | |
498 | TRUE), /* pcrel_offset */ | |
499 | ||
500 | /* .half: (S+A-P) */ | |
501 | HOWTO (R_AARCH64_PREL16, /* type */ | |
502 | 0, /* rightshift */ | |
503 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
504 | 16, /* bitsize */ | |
505 | TRUE, /* pc_relative */ | |
506 | 0, /* bitpos */ | |
507 | complain_overflow_signed, /* complain_on_overflow */ | |
508 | bfd_elf_generic_reloc, /* special_function */ | |
509 | "R_AARCH64_PREL16", /* name */ | |
510 | FALSE, /* partial_inplace */ | |
511 | 0xffff, /* src_mask */ | |
512 | 0xffff, /* dst_mask */ | |
513 | TRUE), /* pcrel_offset */ | |
514 | ||
515 | /* Group relocations to create a 16, 32, 48 or 64 bit | |
516 | unsigned data or abs address inline. */ | |
517 | ||
518 | /* MOVZ: ((S+A) >> 0) & 0xffff */ | |
519 | HOWTO (R_AARCH64_MOVW_UABS_G0, /* type */ | |
520 | 0, /* rightshift */ | |
521 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
522 | 16, /* bitsize */ | |
523 | FALSE, /* pc_relative */ | |
524 | 0, /* bitpos */ | |
525 | complain_overflow_unsigned, /* complain_on_overflow */ | |
526 | bfd_elf_generic_reloc, /* special_function */ | |
527 | "R_AARCH64_MOVW_UABS_G0", /* name */ | |
528 | FALSE, /* partial_inplace */ | |
529 | 0xffff, /* src_mask */ | |
530 | 0xffff, /* dst_mask */ | |
531 | FALSE), /* pcrel_offset */ | |
532 | ||
533 | /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */ | |
534 | HOWTO (R_AARCH64_MOVW_UABS_G0_NC, /* type */ | |
535 | 0, /* rightshift */ | |
536 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
537 | 16, /* bitsize */ | |
538 | FALSE, /* pc_relative */ | |
539 | 0, /* bitpos */ | |
540 | complain_overflow_dont, /* complain_on_overflow */ | |
541 | bfd_elf_generic_reloc, /* special_function */ | |
542 | "R_AARCH64_MOVW_UABS_G0_NC", /* name */ | |
543 | FALSE, /* partial_inplace */ | |
544 | 0xffff, /* src_mask */ | |
545 | 0xffff, /* dst_mask */ | |
546 | FALSE), /* pcrel_offset */ | |
547 | ||
548 | /* MOVZ: ((S+A) >> 16) & 0xffff */ | |
549 | HOWTO (R_AARCH64_MOVW_UABS_G1, /* type */ | |
550 | 16, /* rightshift */ | |
551 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
552 | 16, /* bitsize */ | |
553 | FALSE, /* pc_relative */ | |
554 | 0, /* bitpos */ | |
555 | complain_overflow_unsigned, /* complain_on_overflow */ | |
556 | bfd_elf_generic_reloc, /* special_function */ | |
557 | "R_AARCH64_MOVW_UABS_G1", /* name */ | |
558 | FALSE, /* partial_inplace */ | |
559 | 0xffff, /* src_mask */ | |
560 | 0xffff, /* dst_mask */ | |
561 | FALSE), /* pcrel_offset */ | |
562 | ||
563 | /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */ | |
564 | HOWTO (R_AARCH64_MOVW_UABS_G1_NC, /* type */ | |
565 | 16, /* rightshift */ | |
566 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
567 | 16, /* bitsize */ | |
568 | FALSE, /* pc_relative */ | |
569 | 0, /* bitpos */ | |
570 | complain_overflow_dont, /* complain_on_overflow */ | |
571 | bfd_elf_generic_reloc, /* special_function */ | |
572 | "R_AARCH64_MOVW_UABS_G1_NC", /* name */ | |
573 | FALSE, /* partial_inplace */ | |
574 | 0xffff, /* src_mask */ | |
575 | 0xffff, /* dst_mask */ | |
576 | FALSE), /* pcrel_offset */ | |
577 | ||
578 | /* MOVZ: ((S+A) >> 32) & 0xffff */ | |
579 | HOWTO (R_AARCH64_MOVW_UABS_G2, /* type */ | |
580 | 32, /* rightshift */ | |
581 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
582 | 16, /* bitsize */ | |
583 | FALSE, /* pc_relative */ | |
584 | 0, /* bitpos */ | |
585 | complain_overflow_unsigned, /* complain_on_overflow */ | |
586 | bfd_elf_generic_reloc, /* special_function */ | |
587 | "R_AARCH64_MOVW_UABS_G2", /* name */ | |
588 | FALSE, /* partial_inplace */ | |
589 | 0xffff, /* src_mask */ | |
590 | 0xffff, /* dst_mask */ | |
591 | FALSE), /* pcrel_offset */ | |
592 | ||
593 | /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */ | |
594 | HOWTO (R_AARCH64_MOVW_UABS_G2_NC, /* type */ | |
595 | 32, /* rightshift */ | |
596 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
597 | 16, /* bitsize */ | |
598 | FALSE, /* pc_relative */ | |
599 | 0, /* bitpos */ | |
600 | complain_overflow_dont, /* complain_on_overflow */ | |
601 | bfd_elf_generic_reloc, /* special_function */ | |
602 | "R_AARCH64_MOVW_UABS_G2_NC", /* name */ | |
603 | FALSE, /* partial_inplace */ | |
604 | 0xffff, /* src_mask */ | |
605 | 0xffff, /* dst_mask */ | |
606 | FALSE), /* pcrel_offset */ | |
607 | ||
608 | /* MOVZ: ((S+A) >> 48) & 0xffff */ | |
609 | HOWTO (R_AARCH64_MOVW_UABS_G3, /* type */ | |
610 | 48, /* rightshift */ | |
611 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
612 | 16, /* bitsize */ | |
613 | FALSE, /* pc_relative */ | |
614 | 0, /* bitpos */ | |
615 | complain_overflow_unsigned, /* complain_on_overflow */ | |
616 | bfd_elf_generic_reloc, /* special_function */ | |
617 | "R_AARCH64_MOVW_UABS_G3", /* name */ | |
618 | FALSE, /* partial_inplace */ | |
619 | 0xffff, /* src_mask */ | |
620 | 0xffff, /* dst_mask */ | |
621 | FALSE), /* pcrel_offset */ | |
622 | ||
623 | /* Group relocations to create high part of a 16, 32, 48 or 64 bit | |
624 | signed data or abs address inline. Will change instruction | |
625 | to MOVN or MOVZ depending on sign of calculated value. */ | |
626 | ||
627 | /* MOV[ZN]: ((S+A) >> 0) & 0xffff */ | |
628 | HOWTO (R_AARCH64_MOVW_SABS_G0, /* type */ | |
629 | 0, /* rightshift */ | |
630 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
631 | 16, /* bitsize */ | |
632 | FALSE, /* pc_relative */ | |
633 | 0, /* bitpos */ | |
634 | complain_overflow_signed, /* complain_on_overflow */ | |
635 | bfd_elf_generic_reloc, /* special_function */ | |
636 | "R_AARCH64_MOVW_SABS_G0", /* name */ | |
637 | FALSE, /* partial_inplace */ | |
638 | 0xffff, /* src_mask */ | |
639 | 0xffff, /* dst_mask */ | |
640 | FALSE), /* pcrel_offset */ | |
641 | ||
642 | /* MOV[ZN]: ((S+A) >> 16) & 0xffff */ | |
643 | HOWTO (R_AARCH64_MOVW_SABS_G1, /* type */ | |
644 | 16, /* rightshift */ | |
645 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
646 | 16, /* bitsize */ | |
647 | FALSE, /* pc_relative */ | |
648 | 0, /* bitpos */ | |
649 | complain_overflow_signed, /* complain_on_overflow */ | |
650 | bfd_elf_generic_reloc, /* special_function */ | |
651 | "R_AARCH64_MOVW_SABS_G1", /* name */ | |
652 | FALSE, /* partial_inplace */ | |
653 | 0xffff, /* src_mask */ | |
654 | 0xffff, /* dst_mask */ | |
655 | FALSE), /* pcrel_offset */ | |
656 | ||
657 | /* MOV[ZN]: ((S+A) >> 32) & 0xffff */ | |
658 | HOWTO (R_AARCH64_MOVW_SABS_G2, /* type */ | |
659 | 32, /* rightshift */ | |
660 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
661 | 16, /* bitsize */ | |
662 | FALSE, /* pc_relative */ | |
663 | 0, /* bitpos */ | |
664 | complain_overflow_signed, /* complain_on_overflow */ | |
665 | bfd_elf_generic_reloc, /* special_function */ | |
666 | "R_AARCH64_MOVW_SABS_G2", /* name */ | |
667 | FALSE, /* partial_inplace */ | |
668 | 0xffff, /* src_mask */ | |
669 | 0xffff, /* dst_mask */ | |
670 | FALSE), /* pcrel_offset */ | |
671 | ||
672 | /* Relocations to generate 19, 21 and 33 bit PC-relative load/store | |
673 | addresses: PG(x) is (x & ~0xfff). */ | |
674 | ||
675 | /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */ | |
676 | HOWTO (R_AARCH64_LD_PREL_LO19, /* type */ | |
677 | 2, /* rightshift */ | |
678 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
679 | 19, /* bitsize */ | |
680 | TRUE, /* pc_relative */ | |
681 | 0, /* bitpos */ | |
682 | complain_overflow_signed, /* complain_on_overflow */ | |
683 | bfd_elf_generic_reloc, /* special_function */ | |
684 | "R_AARCH64_LD_PREL_LO19", /* name */ | |
685 | FALSE, /* partial_inplace */ | |
686 | 0x7ffff, /* src_mask */ | |
687 | 0x7ffff, /* dst_mask */ | |
688 | TRUE), /* pcrel_offset */ | |
689 | ||
690 | /* ADR: (S+A-P) & 0x1fffff */ | |
691 | HOWTO (R_AARCH64_ADR_PREL_LO21, /* type */ | |
692 | 0, /* rightshift */ | |
693 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
694 | 21, /* bitsize */ | |
695 | TRUE, /* pc_relative */ | |
696 | 0, /* bitpos */ | |
697 | complain_overflow_signed, /* complain_on_overflow */ | |
698 | bfd_elf_generic_reloc, /* special_function */ | |
699 | "R_AARCH64_ADR_PREL_LO21", /* name */ | |
700 | FALSE, /* partial_inplace */ | |
701 | 0x1fffff, /* src_mask */ | |
702 | 0x1fffff, /* dst_mask */ | |
703 | TRUE), /* pcrel_offset */ | |
704 | ||
705 | /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ | |
706 | HOWTO (R_AARCH64_ADR_PREL_PG_HI21, /* type */ | |
707 | 12, /* rightshift */ | |
708 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
709 | 21, /* bitsize */ | |
710 | TRUE, /* pc_relative */ | |
711 | 0, /* bitpos */ | |
712 | complain_overflow_signed, /* complain_on_overflow */ | |
713 | bfd_elf_generic_reloc, /* special_function */ | |
714 | "R_AARCH64_ADR_PREL_PG_HI21", /* name */ | |
715 | FALSE, /* partial_inplace */ | |
716 | 0x1fffff, /* src_mask */ | |
717 | 0x1fffff, /* dst_mask */ | |
718 | TRUE), /* pcrel_offset */ | |
719 | ||
720 | /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */ | |
721 | HOWTO (R_AARCH64_ADR_PREL_PG_HI21_NC, /* type */ | |
722 | 12, /* rightshift */ | |
723 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
724 | 21, /* bitsize */ | |
725 | TRUE, /* pc_relative */ | |
726 | 0, /* bitpos */ | |
727 | complain_overflow_dont, /* complain_on_overflow */ | |
728 | bfd_elf_generic_reloc, /* special_function */ | |
729 | "R_AARCH64_ADR_PREL_PG_HI21_NC", /* name */ | |
730 | FALSE, /* partial_inplace */ | |
731 | 0x1fffff, /* src_mask */ | |
732 | 0x1fffff, /* dst_mask */ | |
733 | TRUE), /* pcrel_offset */ | |
734 | ||
735 | /* ADD: (S+A) & 0xfff [no overflow check] */ | |
736 | HOWTO (R_AARCH64_ADD_ABS_LO12_NC, /* type */ | |
737 | 0, /* rightshift */ | |
738 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
739 | 12, /* bitsize */ | |
740 | FALSE, /* pc_relative */ | |
741 | 10, /* bitpos */ | |
742 | complain_overflow_dont, /* complain_on_overflow */ | |
743 | bfd_elf_generic_reloc, /* special_function */ | |
744 | "R_AARCH64_ADD_ABS_LO12_NC", /* name */ | |
745 | FALSE, /* partial_inplace */ | |
746 | 0x3ffc00, /* src_mask */ | |
747 | 0x3ffc00, /* dst_mask */ | |
748 | FALSE), /* pcrel_offset */ | |
749 | ||
750 | /* LD/ST8: (S+A) & 0xfff */ | |
751 | HOWTO (R_AARCH64_LDST8_ABS_LO12_NC, /* type */ | |
752 | 0, /* rightshift */ | |
753 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
754 | 12, /* bitsize */ | |
755 | FALSE, /* pc_relative */ | |
756 | 0, /* bitpos */ | |
757 | complain_overflow_dont, /* complain_on_overflow */ | |
758 | bfd_elf_generic_reloc, /* special_function */ | |
759 | "R_AARCH64_LDST8_ABS_LO12_NC", /* name */ | |
760 | FALSE, /* partial_inplace */ | |
761 | 0xfff, /* src_mask */ | |
762 | 0xfff, /* dst_mask */ | |
763 | FALSE), /* pcrel_offset */ | |
764 | ||
765 | /* Relocations for control-flow instructions. */ | |
766 | ||
767 | /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */ | |
768 | HOWTO (R_AARCH64_TSTBR14, /* type */ | |
769 | 2, /* rightshift */ | |
770 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
771 | 14, /* bitsize */ | |
772 | TRUE, /* pc_relative */ | |
773 | 0, /* bitpos */ | |
774 | complain_overflow_signed, /* complain_on_overflow */ | |
775 | bfd_elf_generic_reloc, /* special_function */ | |
776 | "R_AARCH64_TSTBR14", /* name */ | |
777 | FALSE, /* partial_inplace */ | |
778 | 0x3fff, /* src_mask */ | |
779 | 0x3fff, /* dst_mask */ | |
780 | TRUE), /* pcrel_offset */ | |
781 | ||
782 | /* B.cond: ((S+A-P) >> 2) & 0x7ffff */ | |
783 | HOWTO (R_AARCH64_CONDBR19, /* type */ | |
784 | 2, /* rightshift */ | |
785 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
786 | 19, /* bitsize */ | |
787 | TRUE, /* pc_relative */ | |
788 | 0, /* bitpos */ | |
789 | complain_overflow_signed, /* complain_on_overflow */ | |
790 | bfd_elf_generic_reloc, /* special_function */ | |
791 | "R_AARCH64_CONDBR19", /* name */ | |
792 | FALSE, /* partial_inplace */ | |
793 | 0x7ffff, /* src_mask */ | |
794 | 0x7ffff, /* dst_mask */ | |
795 | TRUE), /* pcrel_offset */ | |
796 | ||
797 | EMPTY_HOWTO (281), | |
798 | ||
799 | /* B: ((S+A-P) >> 2) & 0x3ffffff */ | |
800 | HOWTO (R_AARCH64_JUMP26, /* type */ | |
801 | 2, /* rightshift */ | |
802 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
803 | 26, /* bitsize */ | |
804 | TRUE, /* pc_relative */ | |
805 | 0, /* bitpos */ | |
806 | complain_overflow_signed, /* complain_on_overflow */ | |
807 | bfd_elf_generic_reloc, /* special_function */ | |
808 | "R_AARCH64_JUMP26", /* name */ | |
809 | FALSE, /* partial_inplace */ | |
810 | 0x3ffffff, /* src_mask */ | |
811 | 0x3ffffff, /* dst_mask */ | |
812 | TRUE), /* pcrel_offset */ | |
813 | ||
814 | /* BL: ((S+A-P) >> 2) & 0x3ffffff */ | |
815 | HOWTO (R_AARCH64_CALL26, /* type */ | |
816 | 2, /* rightshift */ | |
817 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
818 | 26, /* bitsize */ | |
819 | TRUE, /* pc_relative */ | |
820 | 0, /* bitpos */ | |
821 | complain_overflow_signed, /* complain_on_overflow */ | |
822 | bfd_elf_generic_reloc, /* special_function */ | |
823 | "R_AARCH64_CALL26", /* name */ | |
824 | FALSE, /* partial_inplace */ | |
825 | 0x3ffffff, /* src_mask */ | |
826 | 0x3ffffff, /* dst_mask */ | |
827 | TRUE), /* pcrel_offset */ | |
828 | ||
829 | /* LD/ST16: (S+A) & 0xffe */ | |
830 | HOWTO (R_AARCH64_LDST16_ABS_LO12_NC, /* type */ | |
831 | 1, /* rightshift */ | |
832 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
833 | 12, /* bitsize */ | |
834 | FALSE, /* pc_relative */ | |
835 | 0, /* bitpos */ | |
836 | complain_overflow_dont, /* complain_on_overflow */ | |
837 | bfd_elf_generic_reloc, /* special_function */ | |
838 | "R_AARCH64_LDST16_ABS_LO12_NC", /* name */ | |
839 | FALSE, /* partial_inplace */ | |
840 | 0xffe, /* src_mask */ | |
841 | 0xffe, /* dst_mask */ | |
842 | FALSE), /* pcrel_offset */ | |
843 | ||
844 | /* LD/ST32: (S+A) & 0xffc */ | |
845 | HOWTO (R_AARCH64_LDST32_ABS_LO12_NC, /* type */ | |
846 | 2, /* rightshift */ | |
847 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
848 | 12, /* bitsize */ | |
849 | FALSE, /* pc_relative */ | |
850 | 0, /* bitpos */ | |
851 | complain_overflow_dont, /* complain_on_overflow */ | |
852 | bfd_elf_generic_reloc, /* special_function */ | |
853 | "R_AARCH64_LDST32_ABS_LO12_NC", /* name */ | |
854 | FALSE, /* partial_inplace */ | |
855 | 0xffc, /* src_mask */ | |
856 | 0xffc, /* dst_mask */ | |
857 | FALSE), /* pcrel_offset */ | |
858 | ||
859 | /* LD/ST64: (S+A) & 0xff8 */ | |
860 | HOWTO (R_AARCH64_LDST64_ABS_LO12_NC, /* type */ | |
861 | 3, /* rightshift */ | |
862 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
863 | 12, /* bitsize */ | |
864 | FALSE, /* pc_relative */ | |
865 | 0, /* bitpos */ | |
866 | complain_overflow_dont, /* complain_on_overflow */ | |
867 | bfd_elf_generic_reloc, /* special_function */ | |
868 | "R_AARCH64_LDST64_ABS_LO12_NC", /* name */ | |
869 | FALSE, /* partial_inplace */ | |
870 | 0xff8, /* src_mask */ | |
871 | 0xff8, /* dst_mask */ | |
872 | FALSE), /* pcrel_offset */ | |
873 | ||
874 | EMPTY_HOWTO (287), | |
875 | EMPTY_HOWTO (288), | |
876 | EMPTY_HOWTO (289), | |
877 | EMPTY_HOWTO (290), | |
878 | EMPTY_HOWTO (291), | |
879 | EMPTY_HOWTO (292), | |
880 | EMPTY_HOWTO (293), | |
881 | EMPTY_HOWTO (294), | |
882 | EMPTY_HOWTO (295), | |
883 | EMPTY_HOWTO (296), | |
884 | EMPTY_HOWTO (297), | |
885 | EMPTY_HOWTO (298), | |
886 | ||
887 | /* LD/ST128: (S+A) & 0xff0 */ | |
888 | HOWTO (R_AARCH64_LDST128_ABS_LO12_NC, /* type */ | |
889 | 4, /* rightshift */ | |
890 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
891 | 12, /* bitsize */ | |
892 | FALSE, /* pc_relative */ | |
893 | 0, /* bitpos */ | |
894 | complain_overflow_dont, /* complain_on_overflow */ | |
895 | bfd_elf_generic_reloc, /* special_function */ | |
896 | "R_AARCH64_LDST128_ABS_LO12_NC", /* name */ | |
897 | FALSE, /* partial_inplace */ | |
898 | 0xff0, /* src_mask */ | |
899 | 0xff0, /* dst_mask */ | |
900 | FALSE), /* pcrel_offset */ | |
901 | ||
902 | EMPTY_HOWTO (300), | |
903 | EMPTY_HOWTO (301), | |
904 | EMPTY_HOWTO (302), | |
905 | EMPTY_HOWTO (303), | |
906 | EMPTY_HOWTO (304), | |
907 | EMPTY_HOWTO (305), | |
908 | EMPTY_HOWTO (306), | |
909 | EMPTY_HOWTO (307), | |
910 | EMPTY_HOWTO (308), | |
f41aef5f RE |
911 | |
912 | /* Set a load-literal immediate field to bits | |
913 | 0x1FFFFC of G(S)-P */ | |
914 | HOWTO (R_AARCH64_GOT_LD_PREL19, /* type */ | |
915 | 2, /* rightshift */ | |
916 | 2, /* size (0 = byte,1 = short,2 = long) */ | |
917 | 19, /* bitsize */ | |
918 | TRUE, /* pc_relative */ | |
919 | 0, /* bitpos */ | |
920 | complain_overflow_signed, /* complain_on_overflow */ | |
921 | bfd_elf_generic_reloc, /* special_function */ | |
922 | "R_AARCH64_GOT_LD_PREL19", /* name */ | |
923 | FALSE, /* partial_inplace */ | |
924 | 0xffffe0, /* src_mask */ | |
925 | 0xffffe0, /* dst_mask */ | |
926 | TRUE), /* pcrel_offset */ | |
927 | ||
a06ea964 NC |
928 | EMPTY_HOWTO (310), |
929 | ||
930 | /* Get to the page for the GOT entry for the symbol | |
931 | (G(S) - P) using an ADRP instruction. */ | |
932 | HOWTO (R_AARCH64_ADR_GOT_PAGE, /* type */ | |
933 | 12, /* rightshift */ | |
934 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
935 | 21, /* bitsize */ | |
936 | TRUE, /* pc_relative */ | |
937 | 0, /* bitpos */ | |
938 | complain_overflow_dont, /* complain_on_overflow */ | |
939 | bfd_elf_generic_reloc, /* special_function */ | |
940 | "R_AARCH64_ADR_GOT_PAGE", /* name */ | |
941 | FALSE, /* partial_inplace */ | |
942 | 0x1fffff, /* src_mask */ | |
943 | 0x1fffff, /* dst_mask */ | |
944 | TRUE), /* pcrel_offset */ | |
945 | ||
946 | /* LD64: GOT offset G(S) & 0xff8 */ | |
947 | HOWTO (R_AARCH64_LD64_GOT_LO12_NC, /* type */ | |
948 | 3, /* rightshift */ | |
949 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
950 | 12, /* bitsize */ | |
951 | FALSE, /* pc_relative */ | |
952 | 0, /* bitpos */ | |
953 | complain_overflow_dont, /* complain_on_overflow */ | |
954 | bfd_elf_generic_reloc, /* special_function */ | |
955 | "R_AARCH64_LD64_GOT_LO12_NC", /* name */ | |
956 | FALSE, /* partial_inplace */ | |
957 | 0xff8, /* src_mask */ | |
958 | 0xff8, /* dst_mask */ | |
959 | FALSE) /* pcrel_offset */ | |
960 | }; | |
961 | ||
962 | static reloc_howto_type elf64_aarch64_tls_howto_table[] = | |
963 | { | |
964 | EMPTY_HOWTO (512), | |
965 | ||
966 | /* Get to the page for the GOT entry for the symbol | |
967 | (G(S) - P) using an ADRP instruction. */ | |
968 | HOWTO (R_AARCH64_TLSGD_ADR_PAGE21, /* type */ | |
969 | 12, /* rightshift */ | |
970 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
971 | 21, /* bitsize */ | |
972 | TRUE, /* pc_relative */ | |
973 | 0, /* bitpos */ | |
974 | complain_overflow_dont, /* complain_on_overflow */ | |
975 | bfd_elf_generic_reloc, /* special_function */ | |
976 | "R_AARCH64_TLSGD_ADR_PAGE21", /* name */ | |
977 | FALSE, /* partial_inplace */ | |
978 | 0x1fffff, /* src_mask */ | |
979 | 0x1fffff, /* dst_mask */ | |
980 | TRUE), /* pcrel_offset */ | |
981 | ||
982 | /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */ | |
983 | HOWTO (R_AARCH64_TLSGD_ADD_LO12_NC, /* type */ | |
984 | 0, /* rightshift */ | |
985 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
986 | 12, /* bitsize */ | |
987 | FALSE, /* pc_relative */ | |
988 | 0, /* bitpos */ | |
989 | complain_overflow_dont, /* complain_on_overflow */ | |
990 | bfd_elf_generic_reloc, /* special_function */ | |
991 | "R_AARCH64_TLSGD_ADD_LO12_NC", /* name */ | |
992 | FALSE, /* partial_inplace */ | |
993 | 0xfff, /* src_mask */ | |
994 | 0xfff, /* dst_mask */ | |
995 | FALSE), /* pcrel_offset */ | |
996 | ||
997 | EMPTY_HOWTO (515), | |
998 | EMPTY_HOWTO (516), | |
999 | EMPTY_HOWTO (517), | |
1000 | EMPTY_HOWTO (518), | |
1001 | EMPTY_HOWTO (519), | |
1002 | EMPTY_HOWTO (520), | |
1003 | EMPTY_HOWTO (521), | |
1004 | EMPTY_HOWTO (522), | |
1005 | EMPTY_HOWTO (523), | |
1006 | EMPTY_HOWTO (524), | |
1007 | EMPTY_HOWTO (525), | |
1008 | EMPTY_HOWTO (526), | |
1009 | EMPTY_HOWTO (527), | |
1010 | EMPTY_HOWTO (528), | |
1011 | EMPTY_HOWTO (529), | |
1012 | EMPTY_HOWTO (530), | |
1013 | EMPTY_HOWTO (531), | |
1014 | EMPTY_HOWTO (532), | |
1015 | EMPTY_HOWTO (533), | |
1016 | EMPTY_HOWTO (534), | |
1017 | EMPTY_HOWTO (535), | |
1018 | EMPTY_HOWTO (536), | |
1019 | EMPTY_HOWTO (537), | |
1020 | EMPTY_HOWTO (538), | |
1021 | ||
1022 | HOWTO (R_AARCH64_TLSIE_MOVW_GOTTPREL_G1, /* type */ | |
1023 | 16, /* rightshift */ | |
1024 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1025 | 16, /* bitsize */ | |
1026 | FALSE, /* pc_relative */ | |
1027 | 0, /* bitpos */ | |
1028 | complain_overflow_dont, /* complain_on_overflow */ | |
1029 | bfd_elf_generic_reloc, /* special_function */ | |
1030 | "R_AARCH64_TLSIE_MOVW_GOTTPREL_G1", /* name */ | |
1031 | FALSE, /* partial_inplace */ | |
1032 | 0xffff, /* src_mask */ | |
1033 | 0xffff, /* dst_mask */ | |
1034 | FALSE), /* pcrel_offset */ | |
1035 | ||
1036 | HOWTO (R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC, /* type */ | |
1037 | 0, /* rightshift */ | |
1038 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1039 | 32, /* bitsize */ | |
1040 | FALSE, /* pc_relative */ | |
1041 | 0, /* bitpos */ | |
1042 | complain_overflow_dont, /* complain_on_overflow */ | |
1043 | bfd_elf_generic_reloc, /* special_function */ | |
1044 | "R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC", /* name */ | |
1045 | FALSE, /* partial_inplace */ | |
1046 | 0xffff, /* src_mask */ | |
1047 | 0xffff, /* dst_mask */ | |
1048 | FALSE), /* pcrel_offset */ | |
1049 | ||
1050 | HOWTO (R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21, /* type */ | |
1051 | 12, /* rightshift */ | |
1052 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1053 | 21, /* bitsize */ | |
1054 | FALSE, /* pc_relative */ | |
1055 | 0, /* bitpos */ | |
1056 | complain_overflow_dont, /* complain_on_overflow */ | |
1057 | bfd_elf_generic_reloc, /* special_function */ | |
1058 | "R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21", /* name */ | |
1059 | FALSE, /* partial_inplace */ | |
1060 | 0x1fffff, /* src_mask */ | |
1061 | 0x1fffff, /* dst_mask */ | |
1062 | FALSE), /* pcrel_offset */ | |
1063 | ||
1064 | HOWTO (R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC, /* type */ | |
1065 | 3, /* rightshift */ | |
1066 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1067 | 12, /* bitsize */ | |
1068 | FALSE, /* pc_relative */ | |
1069 | 0, /* bitpos */ | |
1070 | complain_overflow_dont, /* complain_on_overflow */ | |
1071 | bfd_elf_generic_reloc, /* special_function */ | |
1072 | "R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC", /* name */ | |
1073 | FALSE, /* partial_inplace */ | |
1074 | 0xff8, /* src_mask */ | |
1075 | 0xff8, /* dst_mask */ | |
1076 | FALSE), /* pcrel_offset */ | |
1077 | ||
1078 | HOWTO (R_AARCH64_TLSIE_LD_GOTTPREL_PREL19, /* type */ | |
bb3f9ed8 | 1079 | 2, /* rightshift */ |
a06ea964 NC |
1080 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
1081 | 21, /* bitsize */ | |
1082 | FALSE, /* pc_relative */ | |
1083 | 0, /* bitpos */ | |
1084 | complain_overflow_dont, /* complain_on_overflow */ | |
1085 | bfd_elf_generic_reloc, /* special_function */ | |
1086 | "R_AARCH64_TLSIE_LD_GOTTPREL_PREL19", /* name */ | |
1087 | FALSE, /* partial_inplace */ | |
1088 | 0x1ffffc, /* src_mask */ | |
1089 | 0x1ffffc, /* dst_mask */ | |
1090 | FALSE), /* pcrel_offset */ | |
1091 | ||
1092 | HOWTO (R_AARCH64_TLSLE_MOVW_TPREL_G2, /* type */ | |
bb3f9ed8 | 1093 | 32, /* rightshift */ |
a06ea964 NC |
1094 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
1095 | 12, /* bitsize */ | |
1096 | FALSE, /* pc_relative */ | |
1097 | 0, /* bitpos */ | |
1098 | complain_overflow_dont, /* complain_on_overflow */ | |
1099 | bfd_elf_generic_reloc, /* special_function */ | |
1100 | "R_AARCH64_TLSLE_MOVW_TPREL_G2", /* name */ | |
1101 | FALSE, /* partial_inplace */ | |
1102 | 0xffff, /* src_mask */ | |
1103 | 0xffff, /* dst_mask */ | |
1104 | FALSE), /* pcrel_offset */ | |
1105 | ||
1106 | HOWTO (R_AARCH64_TLSLE_MOVW_TPREL_G1, /* type */ | |
bb3f9ed8 | 1107 | 16, /* rightshift */ |
a06ea964 NC |
1108 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
1109 | 12, /* bitsize */ | |
1110 | FALSE, /* pc_relative */ | |
1111 | 0, /* bitpos */ | |
1112 | complain_overflow_dont, /* complain_on_overflow */ | |
1113 | bfd_elf_generic_reloc, /* special_function */ | |
1114 | "R_AARCH64_TLSLE_MOVW_TPREL_G1", /* name */ | |
1115 | FALSE, /* partial_inplace */ | |
1116 | 0xffff, /* src_mask */ | |
1117 | 0xffff, /* dst_mask */ | |
1118 | FALSE), /* pcrel_offset */ | |
1119 | ||
1120 | HOWTO (R_AARCH64_TLSLE_MOVW_TPREL_G1_NC, /* type */ | |
bb3f9ed8 | 1121 | 16, /* rightshift */ |
a06ea964 NC |
1122 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
1123 | 12, /* bitsize */ | |
1124 | FALSE, /* pc_relative */ | |
1125 | 0, /* bitpos */ | |
1126 | complain_overflow_dont, /* complain_on_overflow */ | |
1127 | bfd_elf_generic_reloc, /* special_function */ | |
1128 | "R_AARCH64_TLSLE_MOVW_TPREL_G1_NC", /* name */ | |
1129 | FALSE, /* partial_inplace */ | |
1130 | 0xffff, /* src_mask */ | |
1131 | 0xffff, /* dst_mask */ | |
1132 | FALSE), /* pcrel_offset */ | |
1133 | ||
1134 | HOWTO (R_AARCH64_TLSLE_MOVW_TPREL_G0, /* type */ | |
1135 | 0, /* rightshift */ | |
1136 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1137 | 12, /* bitsize */ | |
1138 | FALSE, /* pc_relative */ | |
1139 | 0, /* bitpos */ | |
1140 | complain_overflow_dont, /* complain_on_overflow */ | |
1141 | bfd_elf_generic_reloc, /* special_function */ | |
1142 | "R_AARCH64_TLSLE_MOVW_TPREL_G0", /* name */ | |
1143 | FALSE, /* partial_inplace */ | |
1144 | 0xffff, /* src_mask */ | |
1145 | 0xffff, /* dst_mask */ | |
1146 | FALSE), /* pcrel_offset */ | |
1147 | ||
1148 | HOWTO (R_AARCH64_TLSLE_MOVW_TPREL_G0_NC, /* type */ | |
1149 | 0, /* rightshift */ | |
1150 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1151 | 12, /* bitsize */ | |
1152 | FALSE, /* pc_relative */ | |
1153 | 0, /* bitpos */ | |
1154 | complain_overflow_dont, /* complain_on_overflow */ | |
1155 | bfd_elf_generic_reloc, /* special_function */ | |
1156 | "R_AARCH64_TLSLE_MOVW_TPREL_G0_NC", /* name */ | |
1157 | FALSE, /* partial_inplace */ | |
1158 | 0xffff, /* src_mask */ | |
1159 | 0xffff, /* dst_mask */ | |
1160 | FALSE), /* pcrel_offset */ | |
1161 | ||
1162 | HOWTO (R_AARCH64_TLSLE_ADD_TPREL_HI12, /* type */ | |
bb3f9ed8 | 1163 | 12, /* rightshift */ |
a06ea964 NC |
1164 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
1165 | 12, /* bitsize */ | |
1166 | FALSE, /* pc_relative */ | |
1167 | 0, /* bitpos */ | |
1168 | complain_overflow_dont, /* complain_on_overflow */ | |
1169 | bfd_elf_generic_reloc, /* special_function */ | |
1170 | "R_AARCH64_TLSLE_ADD_TPREL_HI12", /* name */ | |
1171 | FALSE, /* partial_inplace */ | |
1172 | 0xfff, /* src_mask */ | |
1173 | 0xfff, /* dst_mask */ | |
1174 | FALSE), /* pcrel_offset */ | |
1175 | ||
1176 | HOWTO (R_AARCH64_TLSLE_ADD_TPREL_LO12, /* type */ | |
1177 | 0, /* rightshift */ | |
1178 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1179 | 12, /* bitsize */ | |
1180 | FALSE, /* pc_relative */ | |
1181 | 0, /* bitpos */ | |
1182 | complain_overflow_dont, /* complain_on_overflow */ | |
1183 | bfd_elf_generic_reloc, /* special_function */ | |
1184 | "R_AARCH64_TLSLE_ADD_TPREL_LO12", /* name */ | |
1185 | FALSE, /* partial_inplace */ | |
1186 | 0xfff, /* src_mask */ | |
1187 | 0xfff, /* dst_mask */ | |
1188 | FALSE), /* pcrel_offset */ | |
1189 | ||
1190 | HOWTO (R_AARCH64_TLSLE_ADD_TPREL_LO12_NC, /* type */ | |
1191 | 0, /* rightshift */ | |
1192 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1193 | 12, /* bitsize */ | |
1194 | FALSE, /* pc_relative */ | |
1195 | 0, /* bitpos */ | |
1196 | complain_overflow_dont, /* complain_on_overflow */ | |
1197 | bfd_elf_generic_reloc, /* special_function */ | |
1198 | "R_AARCH64_TLSLE_ADD_TPREL_LO12_NC", /* name */ | |
1199 | FALSE, /* partial_inplace */ | |
1200 | 0xfff, /* src_mask */ | |
1201 | 0xfff, /* dst_mask */ | |
1202 | FALSE), /* pcrel_offset */ | |
1203 | }; | |
1204 | ||
1205 | static reloc_howto_type elf64_aarch64_tlsdesc_howto_table[] = | |
1206 | { | |
1207 | HOWTO (R_AARCH64_TLSDESC_LD64_PREL19, /* type */ | |
bb3f9ed8 | 1208 | 2, /* rightshift */ |
a06ea964 NC |
1209 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
1210 | 21, /* bitsize */ | |
1211 | TRUE, /* pc_relative */ | |
1212 | 0, /* bitpos */ | |
1213 | complain_overflow_dont, /* complain_on_overflow */ | |
1214 | bfd_elf_generic_reloc, /* special_function */ | |
1215 | "R_AARCH64_TLSDESC_LD64_PREL19", /* name */ | |
1216 | FALSE, /* partial_inplace */ | |
1217 | 0x1ffffc, /* src_mask */ | |
1218 | 0x1ffffc, /* dst_mask */ | |
1219 | TRUE), /* pcrel_offset */ | |
1220 | ||
1221 | HOWTO (R_AARCH64_TLSDESC_ADR_PREL21, /* type */ | |
1222 | 0, /* rightshift */ | |
1223 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1224 | 21, /* bitsize */ | |
1225 | TRUE, /* pc_relative */ | |
1226 | 0, /* bitpos */ | |
1227 | complain_overflow_dont, /* complain_on_overflow */ | |
1228 | bfd_elf_generic_reloc, /* special_function */ | |
1229 | "R_AARCH64_TLSDESC_ADR_PREL21", /* name */ | |
1230 | FALSE, /* partial_inplace */ | |
1231 | 0x1fffff, /* src_mask */ | |
1232 | 0x1fffff, /* dst_mask */ | |
1233 | TRUE), /* pcrel_offset */ | |
1234 | ||
1235 | /* Get to the page for the GOT entry for the symbol | |
1236 | (G(S) - P) using an ADRP instruction. */ | |
1237 | HOWTO (R_AARCH64_TLSDESC_ADR_PAGE, /* type */ | |
1238 | 12, /* rightshift */ | |
1239 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1240 | 21, /* bitsize */ | |
1241 | TRUE, /* pc_relative */ | |
1242 | 0, /* bitpos */ | |
1243 | complain_overflow_dont, /* complain_on_overflow */ | |
1244 | bfd_elf_generic_reloc, /* special_function */ | |
1245 | "R_AARCH64_TLSDESC_ADR_PAGE", /* name */ | |
1246 | FALSE, /* partial_inplace */ | |
1247 | 0x1fffff, /* src_mask */ | |
1248 | 0x1fffff, /* dst_mask */ | |
1249 | TRUE), /* pcrel_offset */ | |
1250 | ||
1251 | /* LD64: GOT offset G(S) & 0xfff. */ | |
1252 | HOWTO (R_AARCH64_TLSDESC_LD64_LO12_NC, /* type */ | |
1253 | 3, /* rightshift */ | |
1254 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1255 | 12, /* bitsize */ | |
1256 | FALSE, /* pc_relative */ | |
1257 | 0, /* bitpos */ | |
1258 | complain_overflow_dont, /* complain_on_overflow */ | |
1259 | bfd_elf_generic_reloc, /* special_function */ | |
1260 | "R_AARCH64_TLSDESC_LD64_LO12_NC", /* name */ | |
1261 | FALSE, /* partial_inplace */ | |
1262 | 0xfff, /* src_mask */ | |
1263 | 0xfff, /* dst_mask */ | |
1264 | FALSE), /* pcrel_offset */ | |
1265 | ||
1266 | /* ADD: GOT offset G(S) & 0xfff. */ | |
1267 | HOWTO (R_AARCH64_TLSDESC_ADD_LO12_NC, /* type */ | |
1268 | 0, /* rightshift */ | |
1269 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1270 | 12, /* bitsize */ | |
1271 | FALSE, /* pc_relative */ | |
1272 | 0, /* bitpos */ | |
1273 | complain_overflow_dont, /* complain_on_overflow */ | |
1274 | bfd_elf_generic_reloc, /* special_function */ | |
1275 | "R_AARCH64_TLSDESC_ADD_LO12_NC", /* name */ | |
1276 | FALSE, /* partial_inplace */ | |
1277 | 0xfff, /* src_mask */ | |
1278 | 0xfff, /* dst_mask */ | |
1279 | FALSE), /* pcrel_offset */ | |
1280 | ||
1281 | HOWTO (R_AARCH64_TLSDESC_OFF_G1, /* type */ | |
bb3f9ed8 | 1282 | 16, /* rightshift */ |
a06ea964 NC |
1283 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
1284 | 12, /* bitsize */ | |
1285 | FALSE, /* pc_relative */ | |
1286 | 0, /* bitpos */ | |
1287 | complain_overflow_dont, /* complain_on_overflow */ | |
1288 | bfd_elf_generic_reloc, /* special_function */ | |
1289 | "R_AARCH64_TLSDESC_OFF_G1", /* name */ | |
1290 | FALSE, /* partial_inplace */ | |
1291 | 0xffff, /* src_mask */ | |
1292 | 0xffff, /* dst_mask */ | |
1293 | FALSE), /* pcrel_offset */ | |
1294 | ||
1295 | HOWTO (R_AARCH64_TLSDESC_OFF_G0_NC, /* type */ | |
1296 | 0, /* rightshift */ | |
1297 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1298 | 12, /* bitsize */ | |
1299 | FALSE, /* pc_relative */ | |
1300 | 0, /* bitpos */ | |
1301 | complain_overflow_dont, /* complain_on_overflow */ | |
1302 | bfd_elf_generic_reloc, /* special_function */ | |
1303 | "R_AARCH64_TLSDESC_OFF_G0_NC", /* name */ | |
1304 | FALSE, /* partial_inplace */ | |
1305 | 0xffff, /* src_mask */ | |
1306 | 0xffff, /* dst_mask */ | |
1307 | FALSE), /* pcrel_offset */ | |
1308 | ||
1309 | HOWTO (R_AARCH64_TLSDESC_LDR, /* type */ | |
1310 | 0, /* rightshift */ | |
1311 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1312 | 12, /* bitsize */ | |
1313 | FALSE, /* pc_relative */ | |
1314 | 0, /* bitpos */ | |
1315 | complain_overflow_dont, /* complain_on_overflow */ | |
1316 | bfd_elf_generic_reloc, /* special_function */ | |
1317 | "R_AARCH64_TLSDESC_LDR", /* name */ | |
1318 | FALSE, /* partial_inplace */ | |
1319 | 0x0, /* src_mask */ | |
1320 | 0x0, /* dst_mask */ | |
1321 | FALSE), /* pcrel_offset */ | |
1322 | ||
1323 | HOWTO (R_AARCH64_TLSDESC_ADD, /* type */ | |
1324 | 0, /* rightshift */ | |
1325 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1326 | 12, /* bitsize */ | |
1327 | FALSE, /* pc_relative */ | |
1328 | 0, /* bitpos */ | |
1329 | complain_overflow_dont, /* complain_on_overflow */ | |
1330 | bfd_elf_generic_reloc, /* special_function */ | |
1331 | "R_AARCH64_TLSDESC_ADD", /* name */ | |
1332 | FALSE, /* partial_inplace */ | |
1333 | 0x0, /* src_mask */ | |
1334 | 0x0, /* dst_mask */ | |
1335 | FALSE), /* pcrel_offset */ | |
1336 | ||
1337 | HOWTO (R_AARCH64_TLSDESC_CALL, /* type */ | |
1338 | 0, /* rightshift */ | |
1339 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1340 | 12, /* bitsize */ | |
1341 | FALSE, /* pc_relative */ | |
1342 | 0, /* bitpos */ | |
1343 | complain_overflow_dont, /* complain_on_overflow */ | |
1344 | bfd_elf_generic_reloc, /* special_function */ | |
1345 | "R_AARCH64_TLSDESC_CALL", /* name */ | |
1346 | FALSE, /* partial_inplace */ | |
1347 | 0x0, /* src_mask */ | |
1348 | 0x0, /* dst_mask */ | |
1349 | FALSE), /* pcrel_offset */ | |
1350 | }; | |
1351 | ||
1352 | static reloc_howto_type * | |
1353 | elf64_aarch64_howto_from_type (unsigned int r_type) | |
1354 | { | |
1355 | if (r_type >= R_AARCH64_static_min && r_type < R_AARCH64_static_max) | |
1356 | return &elf64_aarch64_howto_table[r_type - R_AARCH64_static_min]; | |
1357 | ||
1358 | if (r_type >= R_AARCH64_tls_min && r_type < R_AARCH64_tls_max) | |
1359 | return &elf64_aarch64_tls_howto_table[r_type - R_AARCH64_tls_min]; | |
1360 | ||
1361 | if (r_type >= R_AARCH64_tlsdesc_min && r_type < R_AARCH64_tlsdesc_max) | |
1362 | return &elf64_aarch64_tlsdesc_howto_table[r_type - R_AARCH64_tlsdesc_min]; | |
1363 | ||
1364 | if (r_type >= R_AARCH64_dyn_min && r_type < R_AARCH64_dyn_max) | |
1365 | return &elf64_aarch64_howto_dynrelocs[r_type - R_AARCH64_dyn_min]; | |
1366 | ||
1367 | switch (r_type) | |
1368 | { | |
1369 | case R_AARCH64_NONE: | |
1370 | return &elf64_aarch64_howto_none; | |
1371 | ||
1372 | } | |
1373 | bfd_set_error (bfd_error_bad_value); | |
1374 | return NULL; | |
1375 | } | |
1376 | ||
1377 | static void | |
1378 | elf64_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, | |
1379 | Elf_Internal_Rela *elf_reloc) | |
1380 | { | |
1381 | unsigned int r_type; | |
1382 | ||
1383 | r_type = ELF64_R_TYPE (elf_reloc->r_info); | |
1384 | bfd_reloc->howto = elf64_aarch64_howto_from_type (r_type); | |
1385 | } | |
1386 | ||
1387 | struct elf64_aarch64_reloc_map | |
1388 | { | |
1389 | bfd_reloc_code_real_type bfd_reloc_val; | |
1390 | unsigned int elf_reloc_val; | |
1391 | }; | |
1392 | ||
1393 | /* All entries in this list must also be present in | |
1394 | elf64_aarch64_howto_table. */ | |
1395 | static const struct elf64_aarch64_reloc_map elf64_aarch64_reloc_map[] = | |
1396 | { | |
1397 | {BFD_RELOC_NONE, R_AARCH64_NONE}, | |
1398 | ||
1399 | /* Basic data relocations. */ | |
1400 | {BFD_RELOC_CTOR, R_AARCH64_ABS64}, | |
1401 | {BFD_RELOC_64, R_AARCH64_ABS64}, | |
1402 | {BFD_RELOC_32, R_AARCH64_ABS32}, | |
1403 | {BFD_RELOC_16, R_AARCH64_ABS16}, | |
1404 | {BFD_RELOC_64_PCREL, R_AARCH64_PREL64}, | |
1405 | {BFD_RELOC_32_PCREL, R_AARCH64_PREL32}, | |
1406 | {BFD_RELOC_16_PCREL, R_AARCH64_PREL16}, | |
1407 | ||
1408 | /* Group relocations to low order bits of a 16, 32, 48 or 64 bit | |
1409 | value inline. */ | |
1410 | {BFD_RELOC_AARCH64_MOVW_G0_NC, R_AARCH64_MOVW_UABS_G0_NC}, | |
1411 | {BFD_RELOC_AARCH64_MOVW_G1_NC, R_AARCH64_MOVW_UABS_G1_NC}, | |
1412 | {BFD_RELOC_AARCH64_MOVW_G2_NC, R_AARCH64_MOVW_UABS_G2_NC}, | |
1413 | ||
1414 | /* Group relocations to create high bits of a 16, 32, 48 or 64 bit | |
1415 | signed value inline. */ | |
1416 | {BFD_RELOC_AARCH64_MOVW_G0_S, R_AARCH64_MOVW_SABS_G0}, | |
1417 | {BFD_RELOC_AARCH64_MOVW_G1_S, R_AARCH64_MOVW_SABS_G1}, | |
1418 | {BFD_RELOC_AARCH64_MOVW_G2_S, R_AARCH64_MOVW_SABS_G2}, | |
1419 | ||
1420 | /* Group relocations to create high bits of a 16, 32, 48 or 64 bit | |
1421 | unsigned value inline. */ | |
1422 | {BFD_RELOC_AARCH64_MOVW_G0, R_AARCH64_MOVW_UABS_G0}, | |
1423 | {BFD_RELOC_AARCH64_MOVW_G1, R_AARCH64_MOVW_UABS_G1}, | |
1424 | {BFD_RELOC_AARCH64_MOVW_G2, R_AARCH64_MOVW_UABS_G2}, | |
1425 | {BFD_RELOC_AARCH64_MOVW_G3, R_AARCH64_MOVW_UABS_G3}, | |
1426 | ||
1427 | /* Relocations to generate 19, 21 and 33 bit PC-relative load/store. */ | |
1428 | {BFD_RELOC_AARCH64_LD_LO19_PCREL, R_AARCH64_LD_PREL_LO19}, | |
1429 | {BFD_RELOC_AARCH64_ADR_LO21_PCREL, R_AARCH64_ADR_PREL_LO21}, | |
1430 | {BFD_RELOC_AARCH64_ADR_HI21_PCREL, R_AARCH64_ADR_PREL_PG_HI21}, | |
1431 | {BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL, R_AARCH64_ADR_PREL_PG_HI21_NC}, | |
1432 | {BFD_RELOC_AARCH64_ADD_LO12, R_AARCH64_ADD_ABS_LO12_NC}, | |
1433 | {BFD_RELOC_AARCH64_LDST8_LO12, R_AARCH64_LDST8_ABS_LO12_NC}, | |
1434 | {BFD_RELOC_AARCH64_LDST16_LO12, R_AARCH64_LDST16_ABS_LO12_NC}, | |
1435 | {BFD_RELOC_AARCH64_LDST32_LO12, R_AARCH64_LDST32_ABS_LO12_NC}, | |
1436 | {BFD_RELOC_AARCH64_LDST64_LO12, R_AARCH64_LDST64_ABS_LO12_NC}, | |
1437 | {BFD_RELOC_AARCH64_LDST128_LO12, R_AARCH64_LDST128_ABS_LO12_NC}, | |
1438 | ||
1439 | /* Relocations for control-flow instructions. */ | |
1440 | {BFD_RELOC_AARCH64_TSTBR14, R_AARCH64_TSTBR14}, | |
1441 | {BFD_RELOC_AARCH64_BRANCH19, R_AARCH64_CONDBR19}, | |
1442 | {BFD_RELOC_AARCH64_JUMP26, R_AARCH64_JUMP26}, | |
1443 | {BFD_RELOC_AARCH64_CALL26, R_AARCH64_CALL26}, | |
1444 | ||
1445 | /* Relocations for PIC. */ | |
f41aef5f | 1446 | {BFD_RELOC_AARCH64_GOT_LD_PREL19, R_AARCH64_GOT_LD_PREL19}, |
a06ea964 NC |
1447 | {BFD_RELOC_AARCH64_ADR_GOT_PAGE, R_AARCH64_ADR_GOT_PAGE}, |
1448 | {BFD_RELOC_AARCH64_LD64_GOT_LO12_NC, R_AARCH64_LD64_GOT_LO12_NC}, | |
1449 | ||
1450 | /* Relocations for TLS. */ | |
1451 | {BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21, R_AARCH64_TLSGD_ADR_PAGE21}, | |
1452 | {BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC, R_AARCH64_TLSGD_ADD_LO12_NC}, | |
1453 | {BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1, | |
1454 | R_AARCH64_TLSIE_MOVW_GOTTPREL_G1}, | |
1455 | {BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC, | |
1456 | R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC}, | |
1457 | {BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21, | |
1458 | R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21}, | |
1459 | {BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC, | |
1460 | R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC}, | |
1461 | {BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19, | |
1462 | R_AARCH64_TLSIE_LD_GOTTPREL_PREL19}, | |
1463 | {BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2, R_AARCH64_TLSLE_MOVW_TPREL_G2}, | |
1464 | {BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1, R_AARCH64_TLSLE_MOVW_TPREL_G1}, | |
1465 | {BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC, | |
1466 | R_AARCH64_TLSLE_MOVW_TPREL_G1_NC}, | |
1467 | {BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0, R_AARCH64_TLSLE_MOVW_TPREL_G0}, | |
1468 | {BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC, | |
1469 | R_AARCH64_TLSLE_MOVW_TPREL_G0_NC}, | |
1470 | {BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12, R_AARCH64_TLSLE_ADD_TPREL_LO12}, | |
1471 | {BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12, R_AARCH64_TLSLE_ADD_TPREL_HI12}, | |
1472 | {BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC, | |
1473 | R_AARCH64_TLSLE_ADD_TPREL_LO12_NC}, | |
1474 | {BFD_RELOC_AARCH64_TLSDESC_LD64_PREL19, R_AARCH64_TLSDESC_LD64_PREL19}, | |
1475 | {BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21, R_AARCH64_TLSDESC_ADR_PREL21}, | |
1476 | {BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE, R_AARCH64_TLSDESC_ADR_PAGE}, | |
1477 | {BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC, R_AARCH64_TLSDESC_ADD_LO12_NC}, | |
1478 | {BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC, R_AARCH64_TLSDESC_LD64_LO12_NC}, | |
1479 | {BFD_RELOC_AARCH64_TLSDESC_OFF_G1, R_AARCH64_TLSDESC_OFF_G1}, | |
1480 | {BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC, R_AARCH64_TLSDESC_OFF_G0_NC}, | |
1481 | {BFD_RELOC_AARCH64_TLSDESC_LDR, R_AARCH64_TLSDESC_LDR}, | |
1482 | {BFD_RELOC_AARCH64_TLSDESC_ADD, R_AARCH64_TLSDESC_ADD}, | |
1483 | {BFD_RELOC_AARCH64_TLSDESC_CALL, R_AARCH64_TLSDESC_CALL}, | |
1484 | {BFD_RELOC_AARCH64_TLS_DTPMOD64, R_AARCH64_TLS_DTPMOD64}, | |
1485 | {BFD_RELOC_AARCH64_TLS_DTPREL64, R_AARCH64_TLS_DTPREL64}, | |
1486 | {BFD_RELOC_AARCH64_TLS_TPREL64, R_AARCH64_TLS_TPREL64}, | |
1487 | {BFD_RELOC_AARCH64_TLSDESC, R_AARCH64_TLSDESC}, | |
1488 | }; | |
1489 | ||
1490 | static reloc_howto_type * | |
1491 | elf64_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
1492 | bfd_reloc_code_real_type code) | |
1493 | { | |
1494 | unsigned int i; | |
1495 | ||
1496 | for (i = 0; i < ARRAY_SIZE (elf64_aarch64_reloc_map); i++) | |
1497 | if (elf64_aarch64_reloc_map[i].bfd_reloc_val == code) | |
1498 | return elf64_aarch64_howto_from_type | |
1499 | (elf64_aarch64_reloc_map[i].elf_reloc_val); | |
1500 | ||
1501 | bfd_set_error (bfd_error_bad_value); | |
1502 | return NULL; | |
1503 | } | |
1504 | ||
1505 | static reloc_howto_type * | |
1506 | elf64_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
1507 | const char *r_name) | |
1508 | { | |
1509 | unsigned int i; | |
1510 | ||
1511 | for (i = 0; i < ARRAY_SIZE (elf64_aarch64_howto_table); i++) | |
1512 | if (elf64_aarch64_howto_table[i].name != NULL | |
1513 | && strcasecmp (elf64_aarch64_howto_table[i].name, r_name) == 0) | |
1514 | return &elf64_aarch64_howto_table[i]; | |
1515 | ||
1516 | return NULL; | |
1517 | } | |
1518 | ||
cd6fa7fd YZ |
1519 | /* Support for core dump NOTE sections. */ |
1520 | ||
1521 | static bfd_boolean | |
1522 | elf64_aarch64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) | |
1523 | { | |
1524 | int offset; | |
1525 | size_t size; | |
1526 | ||
1527 | switch (note->descsz) | |
1528 | { | |
1529 | default: | |
1530 | return FALSE; | |
1531 | ||
1532 | case 408: /* sizeof(struct elf_prstatus) on Linux/arm64. */ | |
1533 | /* pr_cursig */ | |
1534 | elf_tdata (abfd)->core_signal | |
1535 | = bfd_get_16 (abfd, note->descdata + 12); | |
1536 | ||
1537 | /* pr_pid */ | |
1538 | elf_tdata (abfd)->core_lwpid | |
1539 | = bfd_get_32 (abfd, note->descdata + 32); | |
1540 | ||
1541 | /* pr_reg */ | |
1542 | offset = 112; | |
1543 | size = 288; | |
1544 | ||
1545 | break; | |
1546 | } | |
1547 | ||
1548 | /* Make a ".reg/999" section. */ | |
1549 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
1550 | size, note->descpos + offset); | |
1551 | } | |
1552 | ||
a06ea964 NC |
1553 | #define TARGET_LITTLE_SYM bfd_elf64_littleaarch64_vec |
1554 | #define TARGET_LITTLE_NAME "elf64-littleaarch64" | |
1555 | #define TARGET_BIG_SYM bfd_elf64_bigaarch64_vec | |
1556 | #define TARGET_BIG_NAME "elf64-bigaarch64" | |
1557 | ||
cd6fa7fd YZ |
1558 | #define elf_backend_grok_prstatus elf64_aarch64_grok_prstatus |
1559 | ||
a06ea964 NC |
1560 | typedef unsigned long int insn32; |
1561 | ||
1562 | /* The linker script knows the section names for placement. | |
1563 | The entry_names are used to do simple name mangling on the stubs. | |
1564 | Given a function name, and its type, the stub can be found. The | |
1565 | name can be changed. The only requirement is the %s be present. */ | |
1566 | #define STUB_ENTRY_NAME "__%s_veneer" | |
1567 | ||
1568 | /* The name of the dynamic interpreter. This is put in the .interp | |
1569 | section. */ | |
1570 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" | |
1571 | ||
1572 | #define AARCH64_MAX_FWD_BRANCH_OFFSET \ | |
1573 | (((1 << 25) - 1) << 2) | |
1574 | #define AARCH64_MAX_BWD_BRANCH_OFFSET \ | |
1575 | (-((1 << 25) << 2)) | |
1576 | ||
1577 | #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1) | |
1578 | #define AARCH64_MIN_ADRP_IMM (-(1 << 20)) | |
1579 | ||
1580 | static int | |
1581 | aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place) | |
1582 | { | |
1583 | bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12; | |
1584 | return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM; | |
1585 | } | |
1586 | ||
1587 | static int | |
1588 | aarch64_valid_branch_p (bfd_vma value, bfd_vma place) | |
1589 | { | |
1590 | bfd_signed_vma offset = (bfd_signed_vma) (value - place); | |
1591 | return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET | |
1592 | && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET); | |
1593 | } | |
1594 | ||
1595 | static const uint32_t aarch64_adrp_branch_stub [] = | |
1596 | { | |
1597 | 0x90000010, /* adrp ip0, X */ | |
1598 | /* R_AARCH64_ADR_HI21_PCREL(X) */ | |
1599 | 0x91000210, /* add ip0, ip0, :lo12:X */ | |
1600 | /* R_AARCH64_ADD_ABS_LO12_NC(X) */ | |
1601 | 0xd61f0200, /* br ip0 */ | |
1602 | }; | |
1603 | ||
1604 | static const uint32_t aarch64_long_branch_stub[] = | |
1605 | { | |
1606 | 0x58000090, /* ldr ip0, 1f */ | |
1607 | 0x10000011, /* adr ip1, #0 */ | |
1608 | 0x8b110210, /* add ip0, ip0, ip1 */ | |
1609 | 0xd61f0200, /* br ip0 */ | |
1610 | 0x00000000, /* 1: .xword | |
1611 | R_AARCH64_PREL64(X) + 12 | |
1612 | */ | |
1613 | 0x00000000, | |
1614 | }; | |
1615 | ||
1616 | /* Section name for stubs is the associated section name plus this | |
1617 | string. */ | |
1618 | #define STUB_SUFFIX ".stub" | |
1619 | ||
1620 | enum elf64_aarch64_stub_type | |
1621 | { | |
1622 | aarch64_stub_none, | |
1623 | aarch64_stub_adrp_branch, | |
1624 | aarch64_stub_long_branch, | |
1625 | }; | |
1626 | ||
1627 | struct elf64_aarch64_stub_hash_entry | |
1628 | { | |
1629 | /* Base hash table entry structure. */ | |
1630 | struct bfd_hash_entry root; | |
1631 | ||
1632 | /* The stub section. */ | |
1633 | asection *stub_sec; | |
1634 | ||
1635 | /* Offset within stub_sec of the beginning of this stub. */ | |
1636 | bfd_vma stub_offset; | |
1637 | ||
1638 | /* Given the symbol's value and its section we can determine its final | |
1639 | value when building the stubs (so the stub knows where to jump). */ | |
1640 | bfd_vma target_value; | |
1641 | asection *target_section; | |
1642 | ||
1643 | enum elf64_aarch64_stub_type stub_type; | |
1644 | ||
1645 | /* The symbol table entry, if any, that this was derived from. */ | |
1646 | struct elf64_aarch64_link_hash_entry *h; | |
1647 | ||
1648 | /* Destination symbol type */ | |
1649 | unsigned char st_type; | |
1650 | ||
1651 | /* Where this stub is being called from, or, in the case of combined | |
1652 | stub sections, the first input section in the group. */ | |
1653 | asection *id_sec; | |
1654 | ||
1655 | /* The name for the local symbol at the start of this stub. The | |
1656 | stub name in the hash table has to be unique; this does not, so | |
1657 | it can be friendlier. */ | |
1658 | char *output_name; | |
1659 | }; | |
1660 | ||
1661 | /* Used to build a map of a section. This is required for mixed-endian | |
1662 | code/data. */ | |
1663 | ||
1664 | typedef struct elf64_elf_section_map | |
1665 | { | |
1666 | bfd_vma vma; | |
1667 | char type; | |
1668 | } | |
1669 | elf64_aarch64_section_map; | |
1670 | ||
1671 | ||
1672 | typedef struct _aarch64_elf_section_data | |
1673 | { | |
1674 | struct bfd_elf_section_data elf; | |
1675 | unsigned int mapcount; | |
1676 | unsigned int mapsize; | |
1677 | elf64_aarch64_section_map *map; | |
1678 | } | |
1679 | _aarch64_elf_section_data; | |
1680 | ||
1681 | #define elf64_aarch64_section_data(sec) \ | |
1682 | ((_aarch64_elf_section_data *) elf_section_data (sec)) | |
1683 | ||
1684 | /* The size of the thread control block. */ | |
1685 | #define TCB_SIZE 16 | |
1686 | ||
1687 | struct elf_aarch64_local_symbol | |
1688 | { | |
1689 | unsigned int got_type; | |
1690 | bfd_signed_vma got_refcount; | |
1691 | bfd_vma got_offset; | |
1692 | ||
1693 | /* Offset of the GOTPLT entry reserved for the TLS descriptor. The | |
1694 | offset is from the end of the jump table and reserved entries | |
1695 | within the PLTGOT. | |
1696 | ||
1697 | The magic value (bfd_vma) -1 indicates that an offset has not be | |
1698 | allocated. */ | |
1699 | bfd_vma tlsdesc_got_jump_table_offset; | |
1700 | }; | |
1701 | ||
1702 | struct elf_aarch64_obj_tdata | |
1703 | { | |
1704 | struct elf_obj_tdata root; | |
1705 | ||
1706 | /* local symbol descriptors */ | |
1707 | struct elf_aarch64_local_symbol *locals; | |
1708 | ||
1709 | /* Zero to warn when linking objects with incompatible enum sizes. */ | |
1710 | int no_enum_size_warning; | |
1711 | ||
1712 | /* Zero to warn when linking objects with incompatible wchar_t sizes. */ | |
1713 | int no_wchar_size_warning; | |
1714 | }; | |
1715 | ||
1716 | #define elf_aarch64_tdata(bfd) \ | |
1717 | ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any) | |
1718 | ||
1719 | #define elf64_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals) | |
1720 | ||
1721 | #define is_aarch64_elf(bfd) \ | |
1722 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
1723 | && elf_tdata (bfd) != NULL \ | |
1724 | && elf_object_id (bfd) == AARCH64_ELF_DATA) | |
1725 | ||
1726 | static bfd_boolean | |
1727 | elf64_aarch64_mkobject (bfd *abfd) | |
1728 | { | |
1729 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata), | |
1730 | AARCH64_ELF_DATA); | |
1731 | } | |
1732 | ||
1733 | /* The AArch64 linker needs to keep track of the number of relocs that it | |
1734 | decides to copy in check_relocs for each symbol. This is so that | |
1735 | it can discard PC relative relocs if it doesn't need them when | |
1736 | linking with -Bsymbolic. We store the information in a field | |
1737 | extending the regular ELF linker hash table. */ | |
1738 | ||
1739 | /* This structure keeps track of the number of relocs we have copied | |
1740 | for a given symbol. */ | |
1741 | struct elf64_aarch64_relocs_copied | |
1742 | { | |
1743 | /* Next section. */ | |
1744 | struct elf64_aarch64_relocs_copied *next; | |
1745 | /* A section in dynobj. */ | |
1746 | asection *section; | |
1747 | /* Number of relocs copied in this section. */ | |
1748 | bfd_size_type count; | |
1749 | /* Number of PC-relative relocs copied in this section. */ | |
1750 | bfd_size_type pc_count; | |
1751 | }; | |
1752 | ||
1753 | #define elf64_aarch64_hash_entry(ent) \ | |
1754 | ((struct elf64_aarch64_link_hash_entry *)(ent)) | |
1755 | ||
1756 | #define GOT_UNKNOWN 0 | |
1757 | #define GOT_NORMAL 1 | |
1758 | #define GOT_TLS_GD 2 | |
1759 | #define GOT_TLS_IE 4 | |
1760 | #define GOT_TLSDESC_GD 8 | |
1761 | ||
1762 | #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD)) | |
1763 | ||
1764 | /* AArch64 ELF linker hash entry. */ | |
1765 | struct elf64_aarch64_link_hash_entry | |
1766 | { | |
1767 | struct elf_link_hash_entry root; | |
1768 | ||
1769 | /* Track dynamic relocs copied for this symbol. */ | |
1770 | struct elf_dyn_relocs *dyn_relocs; | |
1771 | ||
1772 | /* Number of PC relative relocs copied for this symbol. */ | |
1773 | struct elf64_aarch64_relocs_copied *relocs_copied; | |
1774 | ||
1775 | /* Since PLT entries have variable size, we need to record the | |
1776 | index into .got.plt instead of recomputing it from the PLT | |
1777 | offset. */ | |
1778 | bfd_signed_vma plt_got_offset; | |
1779 | ||
1780 | /* Bit mask representing the type of GOT entry(s) if any required by | |
1781 | this symbol. */ | |
1782 | unsigned int got_type; | |
1783 | ||
1784 | /* A pointer to the most recently used stub hash entry against this | |
1785 | symbol. */ | |
1786 | struct elf64_aarch64_stub_hash_entry *stub_cache; | |
1787 | ||
1788 | /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset | |
1789 | is from the end of the jump table and reserved entries within the PLTGOT. | |
1790 | ||
1791 | The magic value (bfd_vma) -1 indicates that an offset has not | |
1792 | be allocated. */ | |
1793 | bfd_vma tlsdesc_got_jump_table_offset; | |
1794 | }; | |
1795 | ||
1796 | static unsigned int | |
1797 | elf64_aarch64_symbol_got_type (struct elf_link_hash_entry *h, | |
1798 | bfd *abfd, | |
1799 | unsigned long r_symndx) | |
1800 | { | |
1801 | if (h) | |
1802 | return elf64_aarch64_hash_entry (h)->got_type; | |
1803 | ||
1804 | if (! elf64_aarch64_locals (abfd)) | |
1805 | return GOT_UNKNOWN; | |
1806 | ||
1807 | return elf64_aarch64_locals (abfd)[r_symndx].got_type; | |
1808 | } | |
1809 | ||
1810 | /* Traverse an AArch64 ELF linker hash table. */ | |
1811 | #define elf64_aarch64_link_hash_traverse(table, func, info) \ | |
1812 | (elf_link_hash_traverse \ | |
1813 | (&(table)->root, \ | |
1814 | (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ | |
1815 | (info))) | |
1816 | ||
1817 | /* Get the AArch64 elf linker hash table from a link_info structure. */ | |
1818 | #define elf64_aarch64_hash_table(info) \ | |
1819 | ((struct elf64_aarch64_link_hash_table *) ((info)->hash)) | |
1820 | ||
1821 | #define aarch64_stub_hash_lookup(table, string, create, copy) \ | |
1822 | ((struct elf64_aarch64_stub_hash_entry *) \ | |
1823 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
1824 | ||
1825 | /* AArch64 ELF linker hash table. */ | |
1826 | struct elf64_aarch64_link_hash_table | |
1827 | { | |
1828 | /* The main hash table. */ | |
1829 | struct elf_link_hash_table root; | |
1830 | ||
1831 | /* Nonzero to force PIC branch veneers. */ | |
1832 | int pic_veneer; | |
1833 | ||
1834 | /* The number of bytes in the initial entry in the PLT. */ | |
1835 | bfd_size_type plt_header_size; | |
1836 | ||
1837 | /* The number of bytes in the subsequent PLT etries. */ | |
1838 | bfd_size_type plt_entry_size; | |
1839 | ||
1840 | /* Short-cuts to get to dynamic linker sections. */ | |
1841 | asection *sdynbss; | |
1842 | asection *srelbss; | |
1843 | ||
1844 | /* Small local sym cache. */ | |
1845 | struct sym_cache sym_cache; | |
1846 | ||
1847 | /* For convenience in allocate_dynrelocs. */ | |
1848 | bfd *obfd; | |
1849 | ||
1850 | /* The amount of space used by the reserved portion of the sgotplt | |
1851 | section, plus whatever space is used by the jump slots. */ | |
1852 | bfd_vma sgotplt_jump_table_size; | |
1853 | ||
1854 | /* The stub hash table. */ | |
1855 | struct bfd_hash_table stub_hash_table; | |
1856 | ||
1857 | /* Linker stub bfd. */ | |
1858 | bfd *stub_bfd; | |
1859 | ||
1860 | /* Linker call-backs. */ | |
1861 | asection *(*add_stub_section) (const char *, asection *); | |
1862 | void (*layout_sections_again) (void); | |
1863 | ||
1864 | /* Array to keep track of which stub sections have been created, and | |
1865 | information on stub grouping. */ | |
1866 | struct map_stub | |
1867 | { | |
1868 | /* This is the section to which stubs in the group will be | |
1869 | attached. */ | |
1870 | asection *link_sec; | |
1871 | /* The stub section. */ | |
1872 | asection *stub_sec; | |
1873 | } *stub_group; | |
1874 | ||
1875 | /* Assorted information used by elf64_aarch64_size_stubs. */ | |
1876 | unsigned int bfd_count; | |
1877 | int top_index; | |
1878 | asection **input_list; | |
1879 | ||
1880 | /* The offset into splt of the PLT entry for the TLS descriptor | |
1881 | resolver. Special values are 0, if not necessary (or not found | |
1882 | to be necessary yet), and -1 if needed but not determined | |
1883 | yet. */ | |
1884 | bfd_vma tlsdesc_plt; | |
1885 | ||
1886 | /* The GOT offset for the lazy trampoline. Communicated to the | |
1887 | loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1 | |
1888 | indicates an offset is not allocated. */ | |
1889 | bfd_vma dt_tlsdesc_got; | |
1890 | }; | |
1891 | ||
1892 | ||
1893 | /* Return non-zero if the indicated VALUE has overflowed the maximum | |
1894 | range expressible by a unsigned number with the indicated number of | |
1895 | BITS. */ | |
1896 | ||
1897 | static bfd_reloc_status_type | |
1898 | aarch64_unsigned_overflow (bfd_vma value, unsigned int bits) | |
1899 | { | |
1900 | bfd_vma lim; | |
1901 | if (bits >= sizeof (bfd_vma) * 8) | |
1902 | return bfd_reloc_ok; | |
1903 | lim = (bfd_vma) 1 << bits; | |
1904 | if (value >= lim) | |
1905 | return bfd_reloc_overflow; | |
1906 | return bfd_reloc_ok; | |
1907 | } | |
1908 | ||
1909 | ||
1910 | /* Return non-zero if the indicated VALUE has overflowed the maximum | |
1911 | range expressible by an signed number with the indicated number of | |
1912 | BITS. */ | |
1913 | ||
1914 | static bfd_reloc_status_type | |
1915 | aarch64_signed_overflow (bfd_vma value, unsigned int bits) | |
1916 | { | |
1917 | bfd_signed_vma svalue = (bfd_signed_vma) value; | |
1918 | bfd_signed_vma lim; | |
1919 | ||
1920 | if (bits >= sizeof (bfd_vma) * 8) | |
1921 | return bfd_reloc_ok; | |
1922 | lim = (bfd_signed_vma) 1 << (bits - 1); | |
1923 | if (svalue < -lim || svalue >= lim) | |
1924 | return bfd_reloc_overflow; | |
1925 | return bfd_reloc_ok; | |
1926 | } | |
1927 | ||
1928 | /* Create an entry in an AArch64 ELF linker hash table. */ | |
1929 | ||
1930 | static struct bfd_hash_entry * | |
1931 | elf64_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry, | |
1932 | struct bfd_hash_table *table, | |
1933 | const char *string) | |
1934 | { | |
1935 | struct elf64_aarch64_link_hash_entry *ret = | |
1936 | (struct elf64_aarch64_link_hash_entry *) entry; | |
1937 | ||
1938 | /* Allocate the structure if it has not already been allocated by a | |
1939 | subclass. */ | |
1940 | if (ret == NULL) | |
1941 | ret = bfd_hash_allocate (table, | |
1942 | sizeof (struct elf64_aarch64_link_hash_entry)); | |
1943 | if (ret == NULL) | |
1944 | return (struct bfd_hash_entry *) ret; | |
1945 | ||
1946 | /* Call the allocation method of the superclass. */ | |
1947 | ret = ((struct elf64_aarch64_link_hash_entry *) | |
1948 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
1949 | table, string)); | |
1950 | if (ret != NULL) | |
1951 | { | |
1952 | ret->dyn_relocs = NULL; | |
1953 | ret->relocs_copied = NULL; | |
1954 | ret->got_type = GOT_UNKNOWN; | |
1955 | ret->plt_got_offset = (bfd_vma) - 1; | |
1956 | ret->stub_cache = NULL; | |
1957 | ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; | |
1958 | } | |
1959 | ||
1960 | return (struct bfd_hash_entry *) ret; | |
1961 | } | |
1962 | ||
1963 | /* Initialize an entry in the stub hash table. */ | |
1964 | ||
1965 | static struct bfd_hash_entry * | |
1966 | stub_hash_newfunc (struct bfd_hash_entry *entry, | |
1967 | struct bfd_hash_table *table, const char *string) | |
1968 | { | |
1969 | /* Allocate the structure if it has not already been allocated by a | |
1970 | subclass. */ | |
1971 | if (entry == NULL) | |
1972 | { | |
1973 | entry = bfd_hash_allocate (table, | |
1974 | sizeof (struct | |
1975 | elf64_aarch64_stub_hash_entry)); | |
1976 | if (entry == NULL) | |
1977 | return entry; | |
1978 | } | |
1979 | ||
1980 | /* Call the allocation method of the superclass. */ | |
1981 | entry = bfd_hash_newfunc (entry, table, string); | |
1982 | if (entry != NULL) | |
1983 | { | |
1984 | struct elf64_aarch64_stub_hash_entry *eh; | |
1985 | ||
1986 | /* Initialize the local fields. */ | |
1987 | eh = (struct elf64_aarch64_stub_hash_entry *) entry; | |
1988 | eh->stub_sec = NULL; | |
1989 | eh->stub_offset = 0; | |
1990 | eh->target_value = 0; | |
1991 | eh->target_section = NULL; | |
1992 | eh->stub_type = aarch64_stub_none; | |
1993 | eh->h = NULL; | |
1994 | eh->id_sec = NULL; | |
1995 | } | |
1996 | ||
1997 | return entry; | |
1998 | } | |
1999 | ||
2000 | ||
2001 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
2002 | ||
2003 | static void | |
2004 | elf64_aarch64_copy_indirect_symbol (struct bfd_link_info *info, | |
2005 | struct elf_link_hash_entry *dir, | |
2006 | struct elf_link_hash_entry *ind) | |
2007 | { | |
2008 | struct elf64_aarch64_link_hash_entry *edir, *eind; | |
2009 | ||
2010 | edir = (struct elf64_aarch64_link_hash_entry *) dir; | |
2011 | eind = (struct elf64_aarch64_link_hash_entry *) ind; | |
2012 | ||
2013 | if (eind->dyn_relocs != NULL) | |
2014 | { | |
2015 | if (edir->dyn_relocs != NULL) | |
2016 | { | |
2017 | struct elf_dyn_relocs **pp; | |
2018 | struct elf_dyn_relocs *p; | |
2019 | ||
2020 | /* Add reloc counts against the indirect sym to the direct sym | |
2021 | list. Merge any entries against the same section. */ | |
2022 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) | |
2023 | { | |
2024 | struct elf_dyn_relocs *q; | |
2025 | ||
2026 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
2027 | if (q->sec == p->sec) | |
2028 | { | |
2029 | q->pc_count += p->pc_count; | |
2030 | q->count += p->count; | |
2031 | *pp = p->next; | |
2032 | break; | |
2033 | } | |
2034 | if (q == NULL) | |
2035 | pp = &p->next; | |
2036 | } | |
2037 | *pp = edir->dyn_relocs; | |
2038 | } | |
2039 | ||
2040 | edir->dyn_relocs = eind->dyn_relocs; | |
2041 | eind->dyn_relocs = NULL; | |
2042 | } | |
2043 | ||
2044 | if (eind->relocs_copied != NULL) | |
2045 | { | |
2046 | if (edir->relocs_copied != NULL) | |
2047 | { | |
2048 | struct elf64_aarch64_relocs_copied **pp; | |
2049 | struct elf64_aarch64_relocs_copied *p; | |
2050 | ||
2051 | /* Add reloc counts against the indirect sym to the direct sym | |
2052 | list. Merge any entries against the same section. */ | |
2053 | for (pp = &eind->relocs_copied; (p = *pp) != NULL;) | |
2054 | { | |
2055 | struct elf64_aarch64_relocs_copied *q; | |
2056 | ||
2057 | for (q = edir->relocs_copied; q != NULL; q = q->next) | |
2058 | if (q->section == p->section) | |
2059 | { | |
2060 | q->pc_count += p->pc_count; | |
2061 | q->count += p->count; | |
2062 | *pp = p->next; | |
2063 | break; | |
2064 | } | |
2065 | if (q == NULL) | |
2066 | pp = &p->next; | |
2067 | } | |
2068 | *pp = edir->relocs_copied; | |
2069 | } | |
2070 | ||
2071 | edir->relocs_copied = eind->relocs_copied; | |
2072 | eind->relocs_copied = NULL; | |
2073 | } | |
2074 | ||
2075 | if (ind->root.type == bfd_link_hash_indirect) | |
2076 | { | |
2077 | /* Copy over PLT info. */ | |
2078 | if (dir->got.refcount <= 0) | |
2079 | { | |
2080 | edir->got_type = eind->got_type; | |
2081 | eind->got_type = GOT_UNKNOWN; | |
2082 | } | |
2083 | } | |
2084 | ||
2085 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
2086 | } | |
2087 | ||
2088 | /* Create an AArch64 elf linker hash table. */ | |
2089 | ||
2090 | static struct bfd_link_hash_table * | |
2091 | elf64_aarch64_link_hash_table_create (bfd *abfd) | |
2092 | { | |
2093 | struct elf64_aarch64_link_hash_table *ret; | |
2094 | bfd_size_type amt = sizeof (struct elf64_aarch64_link_hash_table); | |
2095 | ||
2096 | ret = bfd_malloc (amt); | |
2097 | if (ret == NULL) | |
2098 | return NULL; | |
2099 | ||
2100 | if (!_bfd_elf_link_hash_table_init | |
2101 | (&ret->root, abfd, elf64_aarch64_link_hash_newfunc, | |
2102 | sizeof (struct elf64_aarch64_link_hash_entry), AARCH64_ELF_DATA)) | |
2103 | { | |
2104 | free (ret); | |
2105 | return NULL; | |
2106 | } | |
2107 | ||
2108 | ret->sdynbss = NULL; | |
2109 | ret->srelbss = NULL; | |
2110 | ||
2111 | ret->plt_header_size = PLT_ENTRY_SIZE; | |
2112 | ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE; | |
2113 | ||
2114 | ret->sym_cache.abfd = NULL; | |
2115 | ret->obfd = abfd; | |
2116 | ||
2117 | ret->stub_bfd = NULL; | |
2118 | ret->add_stub_section = NULL; | |
2119 | ret->layout_sections_again = NULL; | |
2120 | ret->stub_group = NULL; | |
2121 | ret->bfd_count = 0; | |
2122 | ret->top_index = 0; | |
2123 | ret->input_list = NULL; | |
2124 | ret->tlsdesc_plt = 0; | |
2125 | ret->dt_tlsdesc_got = (bfd_vma) - 1; | |
2126 | ||
2127 | if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc, | |
2128 | sizeof (struct elf64_aarch64_stub_hash_entry))) | |
2129 | { | |
2130 | free (ret); | |
2131 | return NULL; | |
2132 | } | |
2133 | ||
2134 | return &ret->root.root; | |
2135 | } | |
2136 | ||
2137 | /* Free the derived linker hash table. */ | |
2138 | ||
2139 | static void | |
2140 | elf64_aarch64_hash_table_free (struct bfd_link_hash_table *hash) | |
2141 | { | |
2142 | struct elf64_aarch64_link_hash_table *ret | |
2143 | = (struct elf64_aarch64_link_hash_table *) hash; | |
2144 | ||
2145 | bfd_hash_table_free (&ret->stub_hash_table); | |
2146 | _bfd_generic_link_hash_table_free (hash); | |
2147 | } | |
2148 | ||
2149 | static bfd_vma | |
2150 | aarch64_resolve_relocation (unsigned int r_type, bfd_vma place, bfd_vma value, | |
2151 | bfd_vma addend, bfd_boolean weak_undef_p) | |
2152 | { | |
2153 | switch (r_type) | |
2154 | { | |
2155 | case R_AARCH64_TLSDESC_CALL: | |
2156 | case R_AARCH64_NONE: | |
2157 | case R_AARCH64_NULL: | |
2158 | break; | |
2159 | ||
2160 | case R_AARCH64_ADR_PREL_LO21: | |
2161 | case R_AARCH64_CONDBR19: | |
2162 | case R_AARCH64_LD_PREL_LO19: | |
2163 | case R_AARCH64_PREL16: | |
2164 | case R_AARCH64_PREL32: | |
2165 | case R_AARCH64_PREL64: | |
2166 | case R_AARCH64_TSTBR14: | |
2167 | if (weak_undef_p) | |
2168 | value = place; | |
2169 | value = value + addend - place; | |
2170 | break; | |
2171 | ||
2172 | case R_AARCH64_CALL26: | |
2173 | case R_AARCH64_JUMP26: | |
2174 | value = value + addend - place; | |
2175 | break; | |
2176 | ||
2177 | case R_AARCH64_ABS16: | |
2178 | case R_AARCH64_ABS32: | |
2179 | case R_AARCH64_MOVW_SABS_G0: | |
2180 | case R_AARCH64_MOVW_SABS_G1: | |
2181 | case R_AARCH64_MOVW_SABS_G2: | |
2182 | case R_AARCH64_MOVW_UABS_G0: | |
2183 | case R_AARCH64_MOVW_UABS_G0_NC: | |
2184 | case R_AARCH64_MOVW_UABS_G1: | |
2185 | case R_AARCH64_MOVW_UABS_G1_NC: | |
2186 | case R_AARCH64_MOVW_UABS_G2: | |
2187 | case R_AARCH64_MOVW_UABS_G2_NC: | |
2188 | case R_AARCH64_MOVW_UABS_G3: | |
2189 | value = value + addend; | |
2190 | break; | |
2191 | ||
2192 | case R_AARCH64_ADR_PREL_PG_HI21: | |
2193 | case R_AARCH64_ADR_PREL_PG_HI21_NC: | |
2194 | if (weak_undef_p) | |
2195 | value = PG (place); | |
2196 | value = PG (value + addend) - PG (place); | |
2197 | break; | |
2198 | ||
f41aef5f RE |
2199 | case R_AARCH64_GOT_LD_PREL19: |
2200 | value = value + addend - place; | |
2201 | break; | |
2202 | ||
a06ea964 NC |
2203 | case R_AARCH64_ADR_GOT_PAGE: |
2204 | case R_AARCH64_TLSDESC_ADR_PAGE: | |
2205 | case R_AARCH64_TLSGD_ADR_PAGE21: | |
2206 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
2207 | value = PG (value + addend) - PG (place); | |
2208 | break; | |
2209 | ||
2210 | case R_AARCH64_ADD_ABS_LO12_NC: | |
2211 | case R_AARCH64_LD64_GOT_LO12_NC: | |
2212 | case R_AARCH64_LDST8_ABS_LO12_NC: | |
2213 | case R_AARCH64_LDST16_ABS_LO12_NC: | |
2214 | case R_AARCH64_LDST32_ABS_LO12_NC: | |
2215 | case R_AARCH64_LDST64_ABS_LO12_NC: | |
2216 | case R_AARCH64_LDST128_ABS_LO12_NC: | |
2217 | case R_AARCH64_TLSDESC_ADD_LO12_NC: | |
2218 | case R_AARCH64_TLSDESC_ADD: | |
2219 | case R_AARCH64_TLSDESC_LD64_LO12_NC: | |
2220 | case R_AARCH64_TLSDESC_LDR: | |
2221 | case R_AARCH64_TLSGD_ADD_LO12_NC: | |
2222 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
2223 | case R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
2224 | case R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
2225 | value = PG_OFFSET (value + addend); | |
2226 | break; | |
2227 | ||
2228 | case R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
2229 | case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
2230 | value = (value + addend) & (bfd_vma) 0xffff0000; | |
2231 | break; | |
2232 | case R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
2233 | value = (value + addend) & (bfd_vma) 0xfff000; | |
2234 | break; | |
2235 | ||
2236 | case R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
2237 | case R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
2238 | value = (value + addend) & (bfd_vma) 0xffff; | |
2239 | break; | |
2240 | ||
2241 | case R_AARCH64_TLSLE_MOVW_TPREL_G2: | |
2242 | value = (value + addend) & ~(bfd_vma) 0xffffffff; | |
2243 | value -= place & ~(bfd_vma) 0xffffffff; | |
2244 | break; | |
2245 | } | |
2246 | return value; | |
2247 | } | |
2248 | ||
2249 | static bfd_boolean | |
2250 | aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section, | |
2251 | bfd_vma offset, bfd_vma value) | |
2252 | { | |
2253 | reloc_howto_type *howto; | |
2254 | bfd_vma place; | |
2255 | ||
2256 | howto = elf64_aarch64_howto_from_type (r_type); | |
2257 | place = (input_section->output_section->vma + input_section->output_offset | |
2258 | + offset); | |
2259 | value = aarch64_resolve_relocation (r_type, place, value, 0, FALSE); | |
2260 | return bfd_elf_aarch64_put_addend (input_bfd, | |
2261 | input_section->contents + offset, | |
2262 | howto, value); | |
2263 | } | |
2264 | ||
2265 | static enum elf64_aarch64_stub_type | |
2266 | aarch64_select_branch_stub (bfd_vma value, bfd_vma place) | |
2267 | { | |
2268 | if (aarch64_valid_for_adrp_p (value, place)) | |
2269 | return aarch64_stub_adrp_branch; | |
2270 | return aarch64_stub_long_branch; | |
2271 | } | |
2272 | ||
2273 | /* Determine the type of stub needed, if any, for a call. */ | |
2274 | ||
2275 | static enum elf64_aarch64_stub_type | |
2276 | aarch64_type_of_stub (struct bfd_link_info *info, | |
2277 | asection *input_sec, | |
2278 | const Elf_Internal_Rela *rel, | |
2279 | unsigned char st_type, | |
2280 | struct elf64_aarch64_link_hash_entry *hash, | |
2281 | bfd_vma destination) | |
2282 | { | |
2283 | bfd_vma location; | |
2284 | bfd_signed_vma branch_offset; | |
2285 | unsigned int r_type; | |
2286 | struct elf64_aarch64_link_hash_table *globals; | |
2287 | enum elf64_aarch64_stub_type stub_type = aarch64_stub_none; | |
2288 | bfd_boolean via_plt_p; | |
2289 | ||
2290 | if (st_type != STT_FUNC) | |
2291 | return stub_type; | |
2292 | ||
2293 | globals = elf64_aarch64_hash_table (info); | |
2294 | via_plt_p = (globals->root.splt != NULL && hash != NULL | |
2295 | && hash->root.plt.offset != (bfd_vma) - 1); | |
2296 | ||
2297 | if (via_plt_p) | |
2298 | return stub_type; | |
2299 | ||
2300 | /* Determine where the call point is. */ | |
2301 | location = (input_sec->output_offset | |
2302 | + input_sec->output_section->vma + rel->r_offset); | |
2303 | ||
2304 | branch_offset = (bfd_signed_vma) (destination - location); | |
2305 | ||
2306 | r_type = ELF64_R_TYPE (rel->r_info); | |
2307 | ||
2308 | /* We don't want to redirect any old unconditional jump in this way, | |
2309 | only one which is being used for a sibcall, where it is | |
2310 | acceptable for the IP0 and IP1 registers to be clobbered. */ | |
2311 | if ((r_type == R_AARCH64_CALL26 || r_type == R_AARCH64_JUMP26) | |
2312 | && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET | |
2313 | || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET)) | |
2314 | { | |
2315 | stub_type = aarch64_stub_long_branch; | |
2316 | } | |
2317 | ||
2318 | return stub_type; | |
2319 | } | |
2320 | ||
2321 | /* Build a name for an entry in the stub hash table. */ | |
2322 | ||
2323 | static char * | |
2324 | elf64_aarch64_stub_name (const asection *input_section, | |
2325 | const asection *sym_sec, | |
2326 | const struct elf64_aarch64_link_hash_entry *hash, | |
2327 | const Elf_Internal_Rela *rel) | |
2328 | { | |
2329 | char *stub_name; | |
2330 | bfd_size_type len; | |
2331 | ||
2332 | if (hash) | |
2333 | { | |
2334 | len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1; | |
2335 | stub_name = bfd_malloc (len); | |
2336 | if (stub_name != NULL) | |
2337 | snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x", | |
2338 | (unsigned int) input_section->id, | |
2339 | hash->root.root.root.string, | |
2340 | rel->r_addend); | |
2341 | } | |
2342 | else | |
2343 | { | |
2344 | len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1; | |
2345 | stub_name = bfd_malloc (len); | |
2346 | if (stub_name != NULL) | |
2347 | snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x", | |
2348 | (unsigned int) input_section->id, | |
2349 | (unsigned int) sym_sec->id, | |
2350 | (unsigned int) ELF64_R_SYM (rel->r_info), | |
2351 | rel->r_addend); | |
2352 | } | |
2353 | ||
2354 | return stub_name; | |
2355 | } | |
2356 | ||
2357 | /* Look up an entry in the stub hash. Stub entries are cached because | |
2358 | creating the stub name takes a bit of time. */ | |
2359 | ||
2360 | static struct elf64_aarch64_stub_hash_entry * | |
2361 | elf64_aarch64_get_stub_entry (const asection *input_section, | |
2362 | const asection *sym_sec, | |
2363 | struct elf_link_hash_entry *hash, | |
2364 | const Elf_Internal_Rela *rel, | |
2365 | struct elf64_aarch64_link_hash_table *htab) | |
2366 | { | |
2367 | struct elf64_aarch64_stub_hash_entry *stub_entry; | |
2368 | struct elf64_aarch64_link_hash_entry *h = | |
2369 | (struct elf64_aarch64_link_hash_entry *) hash; | |
2370 | const asection *id_sec; | |
2371 | ||
2372 | if ((input_section->flags & SEC_CODE) == 0) | |
2373 | return NULL; | |
2374 | ||
2375 | /* If this input section is part of a group of sections sharing one | |
2376 | stub section, then use the id of the first section in the group. | |
2377 | Stub names need to include a section id, as there may well be | |
2378 | more than one stub used to reach say, printf, and we need to | |
2379 | distinguish between them. */ | |
2380 | id_sec = htab->stub_group[input_section->id].link_sec; | |
2381 | ||
2382 | if (h != NULL && h->stub_cache != NULL | |
2383 | && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec) | |
2384 | { | |
2385 | stub_entry = h->stub_cache; | |
2386 | } | |
2387 | else | |
2388 | { | |
2389 | char *stub_name; | |
2390 | ||
2391 | stub_name = elf64_aarch64_stub_name (id_sec, sym_sec, h, rel); | |
2392 | if (stub_name == NULL) | |
2393 | return NULL; | |
2394 | ||
2395 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, | |
2396 | stub_name, FALSE, FALSE); | |
2397 | if (h != NULL) | |
2398 | h->stub_cache = stub_entry; | |
2399 | ||
2400 | free (stub_name); | |
2401 | } | |
2402 | ||
2403 | return stub_entry; | |
2404 | } | |
2405 | ||
2406 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
2407 | stub entry are initialised. */ | |
2408 | ||
2409 | static struct elf64_aarch64_stub_hash_entry * | |
2410 | elf64_aarch64_add_stub (const char *stub_name, | |
2411 | asection *section, | |
2412 | struct elf64_aarch64_link_hash_table *htab) | |
2413 | { | |
2414 | asection *link_sec; | |
2415 | asection *stub_sec; | |
2416 | struct elf64_aarch64_stub_hash_entry *stub_entry; | |
2417 | ||
2418 | link_sec = htab->stub_group[section->id].link_sec; | |
2419 | stub_sec = htab->stub_group[section->id].stub_sec; | |
2420 | if (stub_sec == NULL) | |
2421 | { | |
2422 | stub_sec = htab->stub_group[link_sec->id].stub_sec; | |
2423 | if (stub_sec == NULL) | |
2424 | { | |
2425 | size_t namelen; | |
2426 | bfd_size_type len; | |
2427 | char *s_name; | |
2428 | ||
2429 | namelen = strlen (link_sec->name); | |
2430 | len = namelen + sizeof (STUB_SUFFIX); | |
2431 | s_name = bfd_alloc (htab->stub_bfd, len); | |
2432 | if (s_name == NULL) | |
2433 | return NULL; | |
2434 | ||
2435 | memcpy (s_name, link_sec->name, namelen); | |
2436 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); | |
2437 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); | |
2438 | if (stub_sec == NULL) | |
2439 | return NULL; | |
2440 | htab->stub_group[link_sec->id].stub_sec = stub_sec; | |
2441 | } | |
2442 | htab->stub_group[section->id].stub_sec = stub_sec; | |
2443 | } | |
2444 | ||
2445 | /* Enter this entry into the linker stub hash table. */ | |
2446 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, | |
2447 | TRUE, FALSE); | |
2448 | if (stub_entry == NULL) | |
2449 | { | |
2450 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), | |
2451 | section->owner, stub_name); | |
2452 | return NULL; | |
2453 | } | |
2454 | ||
2455 | stub_entry->stub_sec = stub_sec; | |
2456 | stub_entry->stub_offset = 0; | |
2457 | stub_entry->id_sec = link_sec; | |
2458 | ||
2459 | return stub_entry; | |
2460 | } | |
2461 | ||
2462 | static bfd_boolean | |
2463 | aarch64_build_one_stub (struct bfd_hash_entry *gen_entry, | |
2464 | void *in_arg ATTRIBUTE_UNUSED) | |
2465 | { | |
2466 | struct elf64_aarch64_stub_hash_entry *stub_entry; | |
2467 | asection *stub_sec; | |
2468 | bfd *stub_bfd; | |
2469 | bfd_byte *loc; | |
2470 | bfd_vma sym_value; | |
2471 | unsigned int template_size; | |
2472 | const uint32_t *template; | |
2473 | unsigned int i; | |
2474 | ||
2475 | /* Massage our args to the form they really have. */ | |
2476 | stub_entry = (struct elf64_aarch64_stub_hash_entry *) gen_entry; | |
2477 | ||
2478 | stub_sec = stub_entry->stub_sec; | |
2479 | ||
2480 | /* Make a note of the offset within the stubs for this entry. */ | |
2481 | stub_entry->stub_offset = stub_sec->size; | |
2482 | loc = stub_sec->contents + stub_entry->stub_offset; | |
2483 | ||
2484 | stub_bfd = stub_sec->owner; | |
2485 | ||
2486 | /* This is the address of the stub destination. */ | |
2487 | sym_value = (stub_entry->target_value | |
2488 | + stub_entry->target_section->output_offset | |
2489 | + stub_entry->target_section->output_section->vma); | |
2490 | ||
2491 | if (stub_entry->stub_type == aarch64_stub_long_branch) | |
2492 | { | |
2493 | bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma | |
2494 | + stub_sec->output_offset); | |
2495 | ||
2496 | /* See if we can relax the stub. */ | |
2497 | if (aarch64_valid_for_adrp_p (sym_value, place)) | |
2498 | stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place); | |
2499 | } | |
2500 | ||
2501 | switch (stub_entry->stub_type) | |
2502 | { | |
2503 | case aarch64_stub_adrp_branch: | |
2504 | template = aarch64_adrp_branch_stub; | |
2505 | template_size = sizeof (aarch64_adrp_branch_stub); | |
2506 | break; | |
2507 | case aarch64_stub_long_branch: | |
2508 | template = aarch64_long_branch_stub; | |
2509 | template_size = sizeof (aarch64_long_branch_stub); | |
2510 | break; | |
2511 | default: | |
2512 | BFD_FAIL (); | |
2513 | return FALSE; | |
2514 | } | |
2515 | ||
2516 | for (i = 0; i < (template_size / sizeof template[0]); i++) | |
2517 | { | |
2518 | bfd_putl32 (template[i], loc); | |
2519 | loc += 4; | |
2520 | } | |
2521 | ||
2522 | template_size = (template_size + 7) & ~7; | |
2523 | stub_sec->size += template_size; | |
2524 | ||
2525 | switch (stub_entry->stub_type) | |
2526 | { | |
2527 | case aarch64_stub_adrp_branch: | |
2528 | if (aarch64_relocate (R_AARCH64_ADR_PREL_PG_HI21, stub_bfd, stub_sec, | |
2529 | stub_entry->stub_offset, sym_value)) | |
2530 | /* The stub would not have been relaxed if the offset was out | |
2531 | of range. */ | |
2532 | BFD_FAIL (); | |
2533 | ||
2534 | _bfd_final_link_relocate | |
2535 | (elf64_aarch64_howto_from_type (R_AARCH64_ADD_ABS_LO12_NC), | |
2536 | stub_bfd, | |
2537 | stub_sec, | |
2538 | stub_sec->contents, | |
2539 | stub_entry->stub_offset + 4, | |
2540 | sym_value, | |
2541 | 0); | |
2542 | break; | |
2543 | ||
2544 | case aarch64_stub_long_branch: | |
2545 | /* We want the value relative to the address 12 bytes back from the | |
2546 | value itself. */ | |
2547 | _bfd_final_link_relocate (elf64_aarch64_howto_from_type | |
2548 | (R_AARCH64_PREL64), stub_bfd, stub_sec, | |
2549 | stub_sec->contents, | |
2550 | stub_entry->stub_offset + 16, | |
2551 | sym_value + 12, 0); | |
2552 | break; | |
2553 | default: | |
2554 | break; | |
2555 | } | |
2556 | ||
2557 | return TRUE; | |
2558 | } | |
2559 | ||
2560 | /* As above, but don't actually build the stub. Just bump offset so | |
2561 | we know stub section sizes. */ | |
2562 | ||
2563 | static bfd_boolean | |
2564 | aarch64_size_one_stub (struct bfd_hash_entry *gen_entry, | |
2565 | void *in_arg ATTRIBUTE_UNUSED) | |
2566 | { | |
2567 | struct elf64_aarch64_stub_hash_entry *stub_entry; | |
2568 | int size; | |
2569 | ||
2570 | /* Massage our args to the form they really have. */ | |
2571 | stub_entry = (struct elf64_aarch64_stub_hash_entry *) gen_entry; | |
2572 | ||
2573 | switch (stub_entry->stub_type) | |
2574 | { | |
2575 | case aarch64_stub_adrp_branch: | |
2576 | size = sizeof (aarch64_adrp_branch_stub); | |
2577 | break; | |
2578 | case aarch64_stub_long_branch: | |
2579 | size = sizeof (aarch64_long_branch_stub); | |
2580 | break; | |
2581 | default: | |
2582 | BFD_FAIL (); | |
2583 | return FALSE; | |
2584 | break; | |
2585 | } | |
2586 | ||
2587 | size = (size + 7) & ~7; | |
2588 | stub_entry->stub_sec->size += size; | |
2589 | return TRUE; | |
2590 | } | |
2591 | ||
2592 | /* External entry points for sizing and building linker stubs. */ | |
2593 | ||
2594 | /* Set up various things so that we can make a list of input sections | |
2595 | for each output section included in the link. Returns -1 on error, | |
2596 | 0 when no stubs will be needed, and 1 on success. */ | |
2597 | ||
2598 | int | |
2599 | elf64_aarch64_setup_section_lists (bfd *output_bfd, | |
2600 | struct bfd_link_info *info) | |
2601 | { | |
2602 | bfd *input_bfd; | |
2603 | unsigned int bfd_count; | |
2604 | int top_id, top_index; | |
2605 | asection *section; | |
2606 | asection **input_list, **list; | |
2607 | bfd_size_type amt; | |
2608 | struct elf64_aarch64_link_hash_table *htab = | |
2609 | elf64_aarch64_hash_table (info); | |
2610 | ||
2611 | if (!is_elf_hash_table (htab)) | |
2612 | return 0; | |
2613 | ||
2614 | /* Count the number of input BFDs and find the top input section id. */ | |
2615 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
2616 | input_bfd != NULL; input_bfd = input_bfd->link_next) | |
2617 | { | |
2618 | bfd_count += 1; | |
2619 | for (section = input_bfd->sections; | |
2620 | section != NULL; section = section->next) | |
2621 | { | |
2622 | if (top_id < section->id) | |
2623 | top_id = section->id; | |
2624 | } | |
2625 | } | |
2626 | htab->bfd_count = bfd_count; | |
2627 | ||
2628 | amt = sizeof (struct map_stub) * (top_id + 1); | |
2629 | htab->stub_group = bfd_zmalloc (amt); | |
2630 | if (htab->stub_group == NULL) | |
2631 | return -1; | |
2632 | ||
2633 | /* We can't use output_bfd->section_count here to find the top output | |
2634 | section index as some sections may have been removed, and | |
2635 | _bfd_strip_section_from_output doesn't renumber the indices. */ | |
2636 | for (section = output_bfd->sections, top_index = 0; | |
2637 | section != NULL; section = section->next) | |
2638 | { | |
2639 | if (top_index < section->index) | |
2640 | top_index = section->index; | |
2641 | } | |
2642 | ||
2643 | htab->top_index = top_index; | |
2644 | amt = sizeof (asection *) * (top_index + 1); | |
2645 | input_list = bfd_malloc (amt); | |
2646 | htab->input_list = input_list; | |
2647 | if (input_list == NULL) | |
2648 | return -1; | |
2649 | ||
2650 | /* For sections we aren't interested in, mark their entries with a | |
2651 | value we can check later. */ | |
2652 | list = input_list + top_index; | |
2653 | do | |
2654 | *list = bfd_abs_section_ptr; | |
2655 | while (list-- != input_list); | |
2656 | ||
2657 | for (section = output_bfd->sections; | |
2658 | section != NULL; section = section->next) | |
2659 | { | |
2660 | if ((section->flags & SEC_CODE) != 0) | |
2661 | input_list[section->index] = NULL; | |
2662 | } | |
2663 | ||
2664 | return 1; | |
2665 | } | |
2666 | ||
2667 | /* Used by elf64_aarch64_next_input_section and group_sections. */ | |
2668 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) | |
2669 | ||
2670 | /* The linker repeatedly calls this function for each input section, | |
2671 | in the order that input sections are linked into output sections. | |
2672 | Build lists of input sections to determine groupings between which | |
2673 | we may insert linker stubs. */ | |
2674 | ||
2675 | void | |
2676 | elf64_aarch64_next_input_section (struct bfd_link_info *info, asection *isec) | |
2677 | { | |
2678 | struct elf64_aarch64_link_hash_table *htab = | |
2679 | elf64_aarch64_hash_table (info); | |
2680 | ||
2681 | if (isec->output_section->index <= htab->top_index) | |
2682 | { | |
2683 | asection **list = htab->input_list + isec->output_section->index; | |
2684 | ||
2685 | if (*list != bfd_abs_section_ptr) | |
2686 | { | |
2687 | /* Steal the link_sec pointer for our list. */ | |
2688 | /* This happens to make the list in reverse order, | |
2689 | which is what we want. */ | |
2690 | PREV_SEC (isec) = *list; | |
2691 | *list = isec; | |
2692 | } | |
2693 | } | |
2694 | } | |
2695 | ||
2696 | /* See whether we can group stub sections together. Grouping stub | |
2697 | sections may result in fewer stubs. More importantly, we need to | |
2698 | put all .init* and .fini* stubs at the beginning of the .init or | |
2699 | .fini output sections respectively, because glibc splits the | |
2700 | _init and _fini functions into multiple parts. Putting a stub in | |
2701 | the middle of a function is not a good idea. */ | |
2702 | ||
2703 | static void | |
2704 | group_sections (struct elf64_aarch64_link_hash_table *htab, | |
2705 | bfd_size_type stub_group_size, | |
2706 | bfd_boolean stubs_always_before_branch) | |
2707 | { | |
2708 | asection **list = htab->input_list + htab->top_index; | |
2709 | ||
2710 | do | |
2711 | { | |
2712 | asection *tail = *list; | |
2713 | ||
2714 | if (tail == bfd_abs_section_ptr) | |
2715 | continue; | |
2716 | ||
2717 | while (tail != NULL) | |
2718 | { | |
2719 | asection *curr; | |
2720 | asection *prev; | |
2721 | bfd_size_type total; | |
2722 | ||
2723 | curr = tail; | |
2724 | total = tail->size; | |
2725 | while ((prev = PREV_SEC (curr)) != NULL | |
2726 | && ((total += curr->output_offset - prev->output_offset) | |
2727 | < stub_group_size)) | |
2728 | curr = prev; | |
2729 | ||
2730 | /* OK, the size from the start of CURR to the end is less | |
2731 | than stub_group_size and thus can be handled by one stub | |
2732 | section. (Or the tail section is itself larger than | |
2733 | stub_group_size, in which case we may be toast.) | |
2734 | We should really be keeping track of the total size of | |
2735 | stubs added here, as stubs contribute to the final output | |
2736 | section size. */ | |
2737 | do | |
2738 | { | |
2739 | prev = PREV_SEC (tail); | |
2740 | /* Set up this stub group. */ | |
2741 | htab->stub_group[tail->id].link_sec = curr; | |
2742 | } | |
2743 | while (tail != curr && (tail = prev) != NULL); | |
2744 | ||
2745 | /* But wait, there's more! Input sections up to stub_group_size | |
2746 | bytes before the stub section can be handled by it too. */ | |
2747 | if (!stubs_always_before_branch) | |
2748 | { | |
2749 | total = 0; | |
2750 | while (prev != NULL | |
2751 | && ((total += tail->output_offset - prev->output_offset) | |
2752 | < stub_group_size)) | |
2753 | { | |
2754 | tail = prev; | |
2755 | prev = PREV_SEC (tail); | |
2756 | htab->stub_group[tail->id].link_sec = curr; | |
2757 | } | |
2758 | } | |
2759 | tail = prev; | |
2760 | } | |
2761 | } | |
2762 | while (list-- != htab->input_list); | |
2763 | ||
2764 | free (htab->input_list); | |
2765 | } | |
2766 | ||
2767 | #undef PREV_SEC | |
2768 | ||
2769 | /* Determine and set the size of the stub section for a final link. | |
2770 | ||
2771 | The basic idea here is to examine all the relocations looking for | |
2772 | PC-relative calls to a target that is unreachable with a "bl" | |
2773 | instruction. */ | |
2774 | ||
2775 | bfd_boolean | |
2776 | elf64_aarch64_size_stubs (bfd *output_bfd, | |
2777 | bfd *stub_bfd, | |
2778 | struct bfd_link_info *info, | |
2779 | bfd_signed_vma group_size, | |
2780 | asection * (*add_stub_section) (const char *, | |
2781 | asection *), | |
2782 | void (*layout_sections_again) (void)) | |
2783 | { | |
2784 | bfd_size_type stub_group_size; | |
2785 | bfd_boolean stubs_always_before_branch; | |
2786 | bfd_boolean stub_changed = 0; | |
2787 | struct elf64_aarch64_link_hash_table *htab = elf64_aarch64_hash_table (info); | |
2788 | ||
2789 | /* Propagate mach to stub bfd, because it may not have been | |
2790 | finalized when we created stub_bfd. */ | |
2791 | bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd), | |
2792 | bfd_get_mach (output_bfd)); | |
2793 | ||
2794 | /* Stash our params away. */ | |
2795 | htab->stub_bfd = stub_bfd; | |
2796 | htab->add_stub_section = add_stub_section; | |
2797 | htab->layout_sections_again = layout_sections_again; | |
2798 | stubs_always_before_branch = group_size < 0; | |
2799 | if (group_size < 0) | |
2800 | stub_group_size = -group_size; | |
2801 | else | |
2802 | stub_group_size = group_size; | |
2803 | ||
2804 | if (stub_group_size == 1) | |
2805 | { | |
2806 | /* Default values. */ | |
2807 | /* Aarch64 branch range is +-128MB. The value used is 1MB less. */ | |
2808 | stub_group_size = 127 * 1024 * 1024; | |
2809 | } | |
2810 | ||
2811 | group_sections (htab, stub_group_size, stubs_always_before_branch); | |
2812 | ||
2813 | while (1) | |
2814 | { | |
2815 | bfd *input_bfd; | |
2816 | unsigned int bfd_indx; | |
2817 | asection *stub_sec; | |
2818 | ||
2819 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
2820 | input_bfd != NULL; input_bfd = input_bfd->link_next, bfd_indx++) | |
2821 | { | |
2822 | Elf_Internal_Shdr *symtab_hdr; | |
2823 | asection *section; | |
2824 | Elf_Internal_Sym *local_syms = NULL; | |
2825 | ||
2826 | /* We'll need the symbol table in a second. */ | |
2827 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2828 | if (symtab_hdr->sh_info == 0) | |
2829 | continue; | |
2830 | ||
2831 | /* Walk over each section attached to the input bfd. */ | |
2832 | for (section = input_bfd->sections; | |
2833 | section != NULL; section = section->next) | |
2834 | { | |
2835 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
2836 | ||
2837 | /* If there aren't any relocs, then there's nothing more | |
2838 | to do. */ | |
2839 | if ((section->flags & SEC_RELOC) == 0 | |
2840 | || section->reloc_count == 0 | |
2841 | || (section->flags & SEC_CODE) == 0) | |
2842 | continue; | |
2843 | ||
2844 | /* If this section is a link-once section that will be | |
2845 | discarded, then don't create any stubs. */ | |
2846 | if (section->output_section == NULL | |
2847 | || section->output_section->owner != output_bfd) | |
2848 | continue; | |
2849 | ||
2850 | /* Get the relocs. */ | |
2851 | internal_relocs | |
2852 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, | |
2853 | NULL, info->keep_memory); | |
2854 | if (internal_relocs == NULL) | |
2855 | goto error_ret_free_local; | |
2856 | ||
2857 | /* Now examine each relocation. */ | |
2858 | irela = internal_relocs; | |
2859 | irelaend = irela + section->reloc_count; | |
2860 | for (; irela < irelaend; irela++) | |
2861 | { | |
2862 | unsigned int r_type, r_indx; | |
2863 | enum elf64_aarch64_stub_type stub_type; | |
2864 | struct elf64_aarch64_stub_hash_entry *stub_entry; | |
2865 | asection *sym_sec; | |
2866 | bfd_vma sym_value; | |
2867 | bfd_vma destination; | |
2868 | struct elf64_aarch64_link_hash_entry *hash; | |
2869 | const char *sym_name; | |
2870 | char *stub_name; | |
2871 | const asection *id_sec; | |
2872 | unsigned char st_type; | |
2873 | bfd_size_type len; | |
2874 | ||
2875 | r_type = ELF64_R_TYPE (irela->r_info); | |
2876 | r_indx = ELF64_R_SYM (irela->r_info); | |
2877 | ||
2878 | if (r_type >= (unsigned int) R_AARCH64_end) | |
2879 | { | |
2880 | bfd_set_error (bfd_error_bad_value); | |
2881 | error_ret_free_internal: | |
2882 | if (elf_section_data (section)->relocs == NULL) | |
2883 | free (internal_relocs); | |
2884 | goto error_ret_free_local; | |
2885 | } | |
2886 | ||
2887 | /* Only look for stubs on unconditional branch and | |
2888 | branch and link instructions. */ | |
2889 | if (r_type != (unsigned int) R_AARCH64_CALL26 | |
2890 | && r_type != (unsigned int) R_AARCH64_JUMP26) | |
2891 | continue; | |
2892 | ||
2893 | /* Now determine the call target, its name, value, | |
2894 | section. */ | |
2895 | sym_sec = NULL; | |
2896 | sym_value = 0; | |
2897 | destination = 0; | |
2898 | hash = NULL; | |
2899 | sym_name = NULL; | |
2900 | if (r_indx < symtab_hdr->sh_info) | |
2901 | { | |
2902 | /* It's a local symbol. */ | |
2903 | Elf_Internal_Sym *sym; | |
2904 | Elf_Internal_Shdr *hdr; | |
2905 | ||
2906 | if (local_syms == NULL) | |
2907 | { | |
2908 | local_syms | |
2909 | = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2910 | if (local_syms == NULL) | |
2911 | local_syms | |
2912 | = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2913 | symtab_hdr->sh_info, 0, | |
2914 | NULL, NULL, NULL); | |
2915 | if (local_syms == NULL) | |
2916 | goto error_ret_free_internal; | |
2917 | } | |
2918 | ||
2919 | sym = local_syms + r_indx; | |
2920 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; | |
2921 | sym_sec = hdr->bfd_section; | |
2922 | if (!sym_sec) | |
2923 | /* This is an undefined symbol. It can never | |
2924 | be resolved. */ | |
2925 | continue; | |
2926 | ||
2927 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
2928 | sym_value = sym->st_value; | |
2929 | destination = (sym_value + irela->r_addend | |
2930 | + sym_sec->output_offset | |
2931 | + sym_sec->output_section->vma); | |
2932 | st_type = ELF_ST_TYPE (sym->st_info); | |
2933 | sym_name | |
2934 | = bfd_elf_string_from_elf_section (input_bfd, | |
2935 | symtab_hdr->sh_link, | |
2936 | sym->st_name); | |
2937 | } | |
2938 | else | |
2939 | { | |
2940 | int e_indx; | |
2941 | ||
2942 | e_indx = r_indx - symtab_hdr->sh_info; | |
2943 | hash = ((struct elf64_aarch64_link_hash_entry *) | |
2944 | elf_sym_hashes (input_bfd)[e_indx]); | |
2945 | ||
2946 | while (hash->root.root.type == bfd_link_hash_indirect | |
2947 | || hash->root.root.type == bfd_link_hash_warning) | |
2948 | hash = ((struct elf64_aarch64_link_hash_entry *) | |
2949 | hash->root.root.u.i.link); | |
2950 | ||
2951 | if (hash->root.root.type == bfd_link_hash_defined | |
2952 | || hash->root.root.type == bfd_link_hash_defweak) | |
2953 | { | |
2954 | struct elf64_aarch64_link_hash_table *globals = | |
2955 | elf64_aarch64_hash_table (info); | |
2956 | sym_sec = hash->root.root.u.def.section; | |
2957 | sym_value = hash->root.root.u.def.value; | |
2958 | /* For a destination in a shared library, | |
2959 | use the PLT stub as target address to | |
2960 | decide whether a branch stub is | |
2961 | needed. */ | |
2962 | if (globals->root.splt != NULL && hash != NULL | |
2963 | && hash->root.plt.offset != (bfd_vma) - 1) | |
2964 | { | |
2965 | sym_sec = globals->root.splt; | |
2966 | sym_value = hash->root.plt.offset; | |
2967 | if (sym_sec->output_section != NULL) | |
2968 | destination = (sym_value | |
2969 | + sym_sec->output_offset | |
2970 | + | |
2971 | sym_sec->output_section->vma); | |
2972 | } | |
2973 | else if (sym_sec->output_section != NULL) | |
2974 | destination = (sym_value + irela->r_addend | |
2975 | + sym_sec->output_offset | |
2976 | + sym_sec->output_section->vma); | |
2977 | } | |
2978 | else if (hash->root.root.type == bfd_link_hash_undefined | |
2979 | || (hash->root.root.type | |
2980 | == bfd_link_hash_undefweak)) | |
2981 | { | |
2982 | /* For a shared library, use the PLT stub as | |
2983 | target address to decide whether a long | |
2984 | branch stub is needed. | |
2985 | For absolute code, they cannot be handled. */ | |
2986 | struct elf64_aarch64_link_hash_table *globals = | |
2987 | elf64_aarch64_hash_table (info); | |
2988 | ||
2989 | if (globals->root.splt != NULL && hash != NULL | |
2990 | && hash->root.plt.offset != (bfd_vma) - 1) | |
2991 | { | |
2992 | sym_sec = globals->root.splt; | |
2993 | sym_value = hash->root.plt.offset; | |
2994 | if (sym_sec->output_section != NULL) | |
2995 | destination = (sym_value | |
2996 | + sym_sec->output_offset | |
2997 | + | |
2998 | sym_sec->output_section->vma); | |
2999 | } | |
3000 | else | |
3001 | continue; | |
3002 | } | |
3003 | else | |
3004 | { | |
3005 | bfd_set_error (bfd_error_bad_value); | |
3006 | goto error_ret_free_internal; | |
3007 | } | |
3008 | st_type = ELF_ST_TYPE (hash->root.type); | |
3009 | sym_name = hash->root.root.root.string; | |
3010 | } | |
3011 | ||
3012 | /* Determine what (if any) linker stub is needed. */ | |
3013 | stub_type = aarch64_type_of_stub | |
3014 | (info, section, irela, st_type, hash, destination); | |
3015 | if (stub_type == aarch64_stub_none) | |
3016 | continue; | |
3017 | ||
3018 | /* Support for grouping stub sections. */ | |
3019 | id_sec = htab->stub_group[section->id].link_sec; | |
3020 | ||
3021 | /* Get the name of this stub. */ | |
3022 | stub_name = elf64_aarch64_stub_name (id_sec, sym_sec, hash, | |
3023 | irela); | |
3024 | if (!stub_name) | |
3025 | goto error_ret_free_internal; | |
3026 | ||
3027 | stub_entry = | |
3028 | aarch64_stub_hash_lookup (&htab->stub_hash_table, | |
3029 | stub_name, FALSE, FALSE); | |
3030 | if (stub_entry != NULL) | |
3031 | { | |
3032 | /* The proper stub has already been created. */ | |
3033 | free (stub_name); | |
3034 | continue; | |
3035 | } | |
3036 | ||
3037 | stub_entry = elf64_aarch64_add_stub (stub_name, section, | |
3038 | htab); | |
3039 | if (stub_entry == NULL) | |
3040 | { | |
3041 | free (stub_name); | |
3042 | goto error_ret_free_internal; | |
3043 | } | |
3044 | ||
3045 | stub_entry->target_value = sym_value; | |
3046 | stub_entry->target_section = sym_sec; | |
3047 | stub_entry->stub_type = stub_type; | |
3048 | stub_entry->h = hash; | |
3049 | stub_entry->st_type = st_type; | |
3050 | ||
3051 | if (sym_name == NULL) | |
3052 | sym_name = "unnamed"; | |
3053 | len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name); | |
3054 | stub_entry->output_name = bfd_alloc (htab->stub_bfd, len); | |
3055 | if (stub_entry->output_name == NULL) | |
3056 | { | |
3057 | free (stub_name); | |
3058 | goto error_ret_free_internal; | |
3059 | } | |
3060 | ||
3061 | snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME, | |
3062 | sym_name); | |
3063 | ||
3064 | stub_changed = TRUE; | |
3065 | } | |
3066 | ||
3067 | /* We're done with the internal relocs, free them. */ | |
3068 | if (elf_section_data (section)->relocs == NULL) | |
3069 | free (internal_relocs); | |
3070 | } | |
3071 | } | |
3072 | ||
3073 | if (!stub_changed) | |
3074 | break; | |
3075 | ||
3076 | /* OK, we've added some stubs. Find out the new size of the | |
3077 | stub sections. */ | |
3078 | for (stub_sec = htab->stub_bfd->sections; | |
3079 | stub_sec != NULL; stub_sec = stub_sec->next) | |
3080 | stub_sec->size = 0; | |
3081 | ||
3082 | bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab); | |
3083 | ||
3084 | /* Ask the linker to do its stuff. */ | |
3085 | (*htab->layout_sections_again) (); | |
3086 | stub_changed = FALSE; | |
3087 | } | |
3088 | ||
3089 | return TRUE; | |
3090 | ||
3091 | error_ret_free_local: | |
3092 | return FALSE; | |
3093 | } | |
3094 | ||
3095 | /* Build all the stubs associated with the current output file. The | |
3096 | stubs are kept in a hash table attached to the main linker hash | |
3097 | table. We also set up the .plt entries for statically linked PIC | |
3098 | functions here. This function is called via aarch64_elf_finish in the | |
3099 | linker. */ | |
3100 | ||
3101 | bfd_boolean | |
3102 | elf64_aarch64_build_stubs (struct bfd_link_info *info) | |
3103 | { | |
3104 | asection *stub_sec; | |
3105 | struct bfd_hash_table *table; | |
3106 | struct elf64_aarch64_link_hash_table *htab; | |
3107 | ||
3108 | htab = elf64_aarch64_hash_table (info); | |
3109 | ||
3110 | for (stub_sec = htab->stub_bfd->sections; | |
3111 | stub_sec != NULL; stub_sec = stub_sec->next) | |
3112 | { | |
3113 | bfd_size_type size; | |
3114 | ||
3115 | /* Ignore non-stub sections. */ | |
3116 | if (!strstr (stub_sec->name, STUB_SUFFIX)) | |
3117 | continue; | |
3118 | ||
3119 | /* Allocate memory to hold the linker stubs. */ | |
3120 | size = stub_sec->size; | |
3121 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); | |
3122 | if (stub_sec->contents == NULL && size != 0) | |
3123 | return FALSE; | |
3124 | stub_sec->size = 0; | |
3125 | } | |
3126 | ||
3127 | /* Build the stubs as directed by the stub hash table. */ | |
3128 | table = &htab->stub_hash_table; | |
3129 | bfd_hash_traverse (table, aarch64_build_one_stub, info); | |
3130 | ||
3131 | return TRUE; | |
3132 | } | |
3133 | ||
3134 | ||
3135 | /* Add an entry to the code/data map for section SEC. */ | |
3136 | ||
3137 | static void | |
3138 | elf64_aarch64_section_map_add (asection *sec, char type, bfd_vma vma) | |
3139 | { | |
3140 | struct _aarch64_elf_section_data *sec_data = | |
3141 | elf64_aarch64_section_data (sec); | |
3142 | unsigned int newidx; | |
3143 | ||
3144 | if (sec_data->map == NULL) | |
3145 | { | |
3146 | sec_data->map = bfd_malloc (sizeof (elf64_aarch64_section_map)); | |
3147 | sec_data->mapcount = 0; | |
3148 | sec_data->mapsize = 1; | |
3149 | } | |
3150 | ||
3151 | newidx = sec_data->mapcount++; | |
3152 | ||
3153 | if (sec_data->mapcount > sec_data->mapsize) | |
3154 | { | |
3155 | sec_data->mapsize *= 2; | |
3156 | sec_data->map = bfd_realloc_or_free | |
3157 | (sec_data->map, sec_data->mapsize * sizeof (elf64_aarch64_section_map)); | |
3158 | } | |
3159 | ||
3160 | if (sec_data->map) | |
3161 | { | |
3162 | sec_data->map[newidx].vma = vma; | |
3163 | sec_data->map[newidx].type = type; | |
3164 | } | |
3165 | } | |
3166 | ||
3167 | ||
3168 | /* Initialise maps of insn/data for input BFDs. */ | |
3169 | void | |
3170 | bfd_elf64_aarch64_init_maps (bfd *abfd) | |
3171 | { | |
3172 | Elf_Internal_Sym *isymbuf; | |
3173 | Elf_Internal_Shdr *hdr; | |
3174 | unsigned int i, localsyms; | |
3175 | ||
3176 | /* Make sure that we are dealing with an AArch64 elf binary. */ | |
3177 | if (!is_aarch64_elf (abfd)) | |
3178 | return; | |
3179 | ||
3180 | if ((abfd->flags & DYNAMIC) != 0) | |
3181 | return; | |
3182 | ||
3183 | hdr = &elf_symtab_hdr (abfd); | |
3184 | localsyms = hdr->sh_info; | |
3185 | ||
3186 | /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field | |
3187 | should contain the number of local symbols, which should come before any | |
3188 | global symbols. Mapping symbols are always local. */ | |
3189 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL); | |
3190 | ||
3191 | /* No internal symbols read? Skip this BFD. */ | |
3192 | if (isymbuf == NULL) | |
3193 | return; | |
3194 | ||
3195 | for (i = 0; i < localsyms; i++) | |
3196 | { | |
3197 | Elf_Internal_Sym *isym = &isymbuf[i]; | |
3198 | asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
3199 | const char *name; | |
3200 | ||
3201 | if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL) | |
3202 | { | |
3203 | name = bfd_elf_string_from_elf_section (abfd, | |
3204 | hdr->sh_link, | |
3205 | isym->st_name); | |
3206 | ||
3207 | if (bfd_is_aarch64_special_symbol_name | |
3208 | (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP)) | |
3209 | elf64_aarch64_section_map_add (sec, name[1], isym->st_value); | |
3210 | } | |
3211 | } | |
3212 | } | |
3213 | ||
3214 | /* Set option values needed during linking. */ | |
3215 | void | |
3216 | bfd_elf64_aarch64_set_options (struct bfd *output_bfd, | |
3217 | struct bfd_link_info *link_info, | |
3218 | int no_enum_warn, | |
3219 | int no_wchar_warn, int pic_veneer) | |
3220 | { | |
3221 | struct elf64_aarch64_link_hash_table *globals; | |
3222 | ||
3223 | globals = elf64_aarch64_hash_table (link_info); | |
3224 | globals->pic_veneer = pic_veneer; | |
3225 | ||
3226 | BFD_ASSERT (is_aarch64_elf (output_bfd)); | |
3227 | elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn; | |
3228 | elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn; | |
3229 | } | |
3230 | ||
3231 | #define MASK(n) ((1u << (n)) - 1) | |
3232 | ||
3233 | /* Decode the 26-bit offset of unconditional branch. */ | |
3234 | static inline uint32_t | |
3235 | decode_branch_ofs_26 (uint32_t insn) | |
3236 | { | |
3237 | return insn & MASK (26); | |
3238 | } | |
3239 | ||
3240 | /* Decode the 19-bit offset of conditional branch and compare & branch. */ | |
3241 | static inline uint32_t | |
3242 | decode_cond_branch_ofs_19 (uint32_t insn) | |
3243 | { | |
3244 | return (insn >> 5) & MASK (19); | |
3245 | } | |
3246 | ||
3247 | /* Decode the 19-bit offset of load literal. */ | |
3248 | static inline uint32_t | |
3249 | decode_ld_lit_ofs_19 (uint32_t insn) | |
3250 | { | |
3251 | return (insn >> 5) & MASK (19); | |
3252 | } | |
3253 | ||
3254 | /* Decode the 14-bit offset of test & branch. */ | |
3255 | static inline uint32_t | |
3256 | decode_tst_branch_ofs_14 (uint32_t insn) | |
3257 | { | |
3258 | return (insn >> 5) & MASK (14); | |
3259 | } | |
3260 | ||
3261 | /* Decode the 16-bit imm of move wide. */ | |
3262 | static inline uint32_t | |
3263 | decode_movw_imm (uint32_t insn) | |
3264 | { | |
3265 | return (insn >> 5) & MASK (16); | |
3266 | } | |
3267 | ||
3268 | /* Decode the 21-bit imm of adr. */ | |
3269 | static inline uint32_t | |
3270 | decode_adr_imm (uint32_t insn) | |
3271 | { | |
3272 | return ((insn >> 29) & MASK (2)) | ((insn >> 3) & (MASK (19) << 2)); | |
3273 | } | |
3274 | ||
3275 | /* Decode the 12-bit imm of add immediate. */ | |
3276 | static inline uint32_t | |
3277 | decode_add_imm (uint32_t insn) | |
3278 | { | |
3279 | return (insn >> 10) & MASK (12); | |
3280 | } | |
3281 | ||
3282 | ||
3283 | /* Encode the 26-bit offset of unconditional branch. */ | |
3284 | static inline uint32_t | |
3285 | reencode_branch_ofs_26 (uint32_t insn, uint32_t ofs) | |
3286 | { | |
3287 | return (insn & ~MASK (26)) | (ofs & MASK (26)); | |
3288 | } | |
3289 | ||
3290 | /* Encode the 19-bit offset of conditional branch and compare & branch. */ | |
3291 | static inline uint32_t | |
3292 | reencode_cond_branch_ofs_19 (uint32_t insn, uint32_t ofs) | |
3293 | { | |
3294 | return (insn & ~(MASK (19) << 5)) | ((ofs & MASK (19)) << 5); | |
3295 | } | |
3296 | ||
3297 | /* Decode the 19-bit offset of load literal. */ | |
3298 | static inline uint32_t | |
3299 | reencode_ld_lit_ofs_19 (uint32_t insn, uint32_t ofs) | |
3300 | { | |
3301 | return (insn & ~(MASK (19) << 5)) | ((ofs & MASK (19)) << 5); | |
3302 | } | |
3303 | ||
3304 | /* Encode the 14-bit offset of test & branch. */ | |
3305 | static inline uint32_t | |
3306 | reencode_tst_branch_ofs_14 (uint32_t insn, uint32_t ofs) | |
3307 | { | |
3308 | return (insn & ~(MASK (14) << 5)) | ((ofs & MASK (14)) << 5); | |
3309 | } | |
3310 | ||
3311 | /* Reencode the imm field of move wide. */ | |
3312 | static inline uint32_t | |
3313 | reencode_movw_imm (uint32_t insn, uint32_t imm) | |
3314 | { | |
3315 | return (insn & ~(MASK (16) << 5)) | ((imm & MASK (16)) << 5); | |
3316 | } | |
3317 | ||
3318 | /* Reencode the imm field of adr. */ | |
3319 | static inline uint32_t | |
3320 | reencode_adr_imm (uint32_t insn, uint32_t imm) | |
3321 | { | |
3322 | return (insn & ~((MASK (2) << 29) | (MASK (19) << 5))) | |
3323 | | ((imm & MASK (2)) << 29) | ((imm & (MASK (19) << 2)) << 3); | |
3324 | } | |
3325 | ||
3326 | /* Reencode the imm field of ld/st pos immediate. */ | |
3327 | static inline uint32_t | |
3328 | reencode_ldst_pos_imm (uint32_t insn, uint32_t imm) | |
3329 | { | |
3330 | return (insn & ~(MASK (12) << 10)) | ((imm & MASK (12)) << 10); | |
3331 | } | |
3332 | ||
3333 | /* Reencode the imm field of add immediate. */ | |
3334 | static inline uint32_t | |
3335 | reencode_add_imm (uint32_t insn, uint32_t imm) | |
3336 | { | |
3337 | return (insn & ~(MASK (12) << 10)) | ((imm & MASK (12)) << 10); | |
3338 | } | |
3339 | ||
3340 | /* Reencode mov[zn] to movz. */ | |
3341 | static inline uint32_t | |
3342 | reencode_movzn_to_movz (uint32_t opcode) | |
3343 | { | |
3344 | return opcode | (1 << 30); | |
3345 | } | |
3346 | ||
3347 | /* Reencode mov[zn] to movn. */ | |
3348 | static inline uint32_t | |
3349 | reencode_movzn_to_movn (uint32_t opcode) | |
3350 | { | |
3351 | return opcode & ~(1 << 30); | |
3352 | } | |
3353 | ||
3354 | /* Insert the addend/value into the instruction or data object being | |
3355 | relocated. */ | |
3356 | static bfd_reloc_status_type | |
3357 | bfd_elf_aarch64_put_addend (bfd *abfd, | |
3358 | bfd_byte *address, | |
3359 | reloc_howto_type *howto, bfd_signed_vma addend) | |
3360 | { | |
3361 | bfd_reloc_status_type status = bfd_reloc_ok; | |
3362 | bfd_signed_vma old_addend = addend; | |
3363 | bfd_vma contents; | |
3364 | int size; | |
3365 | ||
3366 | size = bfd_get_reloc_size (howto); | |
3367 | switch (size) | |
3368 | { | |
3369 | case 2: | |
3370 | contents = bfd_get_16 (abfd, address); | |
3371 | break; | |
3372 | case 4: | |
3373 | if (howto->src_mask != 0xffffffff) | |
3374 | /* Must be 32-bit instruction, always little-endian. */ | |
3375 | contents = bfd_getl32 (address); | |
3376 | else | |
3377 | /* Must be 32-bit data (endianness dependent). */ | |
3378 | contents = bfd_get_32 (abfd, address); | |
3379 | break; | |
3380 | case 8: | |
3381 | contents = bfd_get_64 (abfd, address); | |
3382 | break; | |
3383 | default: | |
3384 | abort (); | |
3385 | } | |
3386 | ||
3387 | switch (howto->complain_on_overflow) | |
3388 | { | |
3389 | case complain_overflow_dont: | |
3390 | break; | |
3391 | case complain_overflow_signed: | |
3392 | status = aarch64_signed_overflow (addend, | |
3393 | howto->bitsize + howto->rightshift); | |
3394 | break; | |
3395 | case complain_overflow_unsigned: | |
3396 | status = aarch64_unsigned_overflow (addend, | |
3397 | howto->bitsize + howto->rightshift); | |
3398 | break; | |
3399 | case complain_overflow_bitfield: | |
3400 | default: | |
3401 | abort (); | |
3402 | } | |
3403 | ||
3404 | addend >>= howto->rightshift; | |
3405 | ||
3406 | switch (howto->type) | |
3407 | { | |
3408 | case R_AARCH64_JUMP26: | |
3409 | case R_AARCH64_CALL26: | |
3410 | contents = reencode_branch_ofs_26 (contents, addend); | |
3411 | break; | |
3412 | ||
3413 | case R_AARCH64_CONDBR19: | |
3414 | contents = reencode_cond_branch_ofs_19 (contents, addend); | |
3415 | break; | |
3416 | ||
3417 | case R_AARCH64_TSTBR14: | |
3418 | contents = reencode_tst_branch_ofs_14 (contents, addend); | |
3419 | break; | |
3420 | ||
3421 | case R_AARCH64_LD_PREL_LO19: | |
f41aef5f | 3422 | case R_AARCH64_GOT_LD_PREL19: |
a06ea964 NC |
3423 | if (old_addend & ((1 << howto->rightshift) - 1)) |
3424 | return bfd_reloc_overflow; | |
3425 | contents = reencode_ld_lit_ofs_19 (contents, addend); | |
3426 | break; | |
3427 | ||
3428 | case R_AARCH64_TLSDESC_CALL: | |
3429 | break; | |
3430 | ||
3431 | case R_AARCH64_TLSGD_ADR_PAGE21: | |
3432 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
3433 | case R_AARCH64_TLSDESC_ADR_PAGE: | |
3434 | case R_AARCH64_ADR_GOT_PAGE: | |
3435 | case R_AARCH64_ADR_PREL_LO21: | |
3436 | case R_AARCH64_ADR_PREL_PG_HI21: | |
3437 | case R_AARCH64_ADR_PREL_PG_HI21_NC: | |
3438 | contents = reencode_adr_imm (contents, addend); | |
3439 | break; | |
3440 | ||
3441 | case R_AARCH64_TLSGD_ADD_LO12_NC: | |
3442 | case R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
3443 | case R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
3444 | case R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
3445 | case R_AARCH64_TLSDESC_ADD_LO12_NC: | |
3446 | case R_AARCH64_ADD_ABS_LO12_NC: | |
3447 | /* Corresponds to: add rd, rn, #uimm12 to provide the low order | |
3448 | 12 bits of the page offset following | |
3449 | R_AARCH64_ADR_PREL_PG_HI21 which computes the | |
3450 | (pc-relative) page base. */ | |
3451 | contents = reencode_add_imm (contents, addend); | |
3452 | break; | |
3453 | ||
3454 | case R_AARCH64_LDST8_ABS_LO12_NC: | |
3455 | case R_AARCH64_LDST16_ABS_LO12_NC: | |
3456 | case R_AARCH64_LDST32_ABS_LO12_NC: | |
3457 | case R_AARCH64_LDST64_ABS_LO12_NC: | |
3458 | case R_AARCH64_LDST128_ABS_LO12_NC: | |
3459 | case R_AARCH64_TLSDESC_LD64_LO12_NC: | |
3460 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
3461 | case R_AARCH64_LD64_GOT_LO12_NC: | |
3462 | if (old_addend & ((1 << howto->rightshift) - 1)) | |
3463 | return bfd_reloc_overflow; | |
3464 | /* Used for ldr*|str* rt, [rn, #uimm12] to provide the low order | |
3465 | 12 bits of the page offset following R_AARCH64_ADR_PREL_PG_HI21 | |
3466 | which computes the (pc-relative) page base. */ | |
3467 | contents = reencode_ldst_pos_imm (contents, addend); | |
3468 | break; | |
3469 | ||
3470 | /* Group relocations to create high bits of a 16, 32, 48 or 64 | |
3471 | bit signed data or abs address inline. Will change | |
3472 | instruction to MOVN or MOVZ depending on sign of calculated | |
3473 | value. */ | |
3474 | ||
3475 | case R_AARCH64_TLSLE_MOVW_TPREL_G2: | |
3476 | case R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
3477 | case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
3478 | case R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
3479 | case R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
3480 | case R_AARCH64_MOVW_SABS_G0: | |
3481 | case R_AARCH64_MOVW_SABS_G1: | |
3482 | case R_AARCH64_MOVW_SABS_G2: | |
3483 | /* NOTE: We can only come here with movz or movn. */ | |
3484 | if (addend < 0) | |
3485 | { | |
3486 | /* Force use of MOVN. */ | |
3487 | addend = ~addend; | |
3488 | contents = reencode_movzn_to_movn (contents); | |
3489 | } | |
3490 | else | |
3491 | { | |
3492 | /* Force use of MOVZ. */ | |
3493 | contents = reencode_movzn_to_movz (contents); | |
3494 | } | |
3495 | /* fall through */ | |
3496 | ||
3497 | /* Group relocations to create a 16, 32, 48 or 64 bit unsigned | |
3498 | data or abs address inline. */ | |
3499 | ||
3500 | case R_AARCH64_MOVW_UABS_G0: | |
3501 | case R_AARCH64_MOVW_UABS_G0_NC: | |
3502 | case R_AARCH64_MOVW_UABS_G1: | |
3503 | case R_AARCH64_MOVW_UABS_G1_NC: | |
3504 | case R_AARCH64_MOVW_UABS_G2: | |
3505 | case R_AARCH64_MOVW_UABS_G2_NC: | |
3506 | case R_AARCH64_MOVW_UABS_G3: | |
3507 | contents = reencode_movw_imm (contents, addend); | |
3508 | break; | |
3509 | ||
3510 | default: | |
3511 | /* Repack simple data */ | |
3512 | if (howto->dst_mask & (howto->dst_mask + 1)) | |
3513 | return bfd_reloc_notsupported; | |
3514 | ||
3515 | contents = ((contents & ~howto->dst_mask) | (addend & howto->dst_mask)); | |
3516 | break; | |
3517 | } | |
3518 | ||
3519 | switch (size) | |
3520 | { | |
3521 | case 2: | |
3522 | bfd_put_16 (abfd, contents, address); | |
3523 | break; | |
3524 | case 4: | |
3525 | if (howto->dst_mask != 0xffffffff) | |
3526 | /* must be 32-bit instruction, always little-endian */ | |
3527 | bfd_putl32 (contents, address); | |
3528 | else | |
3529 | /* must be 32-bit data (endianness dependent) */ | |
3530 | bfd_put_32 (abfd, contents, address); | |
3531 | break; | |
3532 | case 8: | |
3533 | bfd_put_64 (abfd, contents, address); | |
3534 | break; | |
3535 | default: | |
3536 | abort (); | |
3537 | } | |
3538 | ||
3539 | return status; | |
3540 | } | |
3541 | ||
3542 | static bfd_vma | |
3543 | aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h, | |
3544 | struct elf64_aarch64_link_hash_table | |
3545 | *globals, struct bfd_link_info *info, | |
3546 | bfd_vma value, bfd *output_bfd, | |
3547 | bfd_boolean *unresolved_reloc_p) | |
3548 | { | |
3549 | bfd_vma off = (bfd_vma) - 1; | |
3550 | asection *basegot = globals->root.sgot; | |
3551 | bfd_boolean dyn = globals->root.dynamic_sections_created; | |
3552 | ||
3553 | if (h != NULL) | |
3554 | { | |
3555 | off = h->got.offset; | |
3556 | BFD_ASSERT (off != (bfd_vma) - 1); | |
3557 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) | |
3558 | || (info->shared | |
3559 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
3560 | || (ELF_ST_VISIBILITY (h->other) | |
3561 | && h->root.type == bfd_link_hash_undefweak)) | |
3562 | { | |
3563 | /* This is actually a static link, or it is a -Bsymbolic link | |
3564 | and the symbol is defined locally. We must initialize this | |
3565 | entry in the global offset table. Since the offset must | |
3566 | always be a multiple of 8, we use the least significant bit | |
3567 | to record whether we have initialized it already. | |
3568 | When doing a dynamic link, we create a .rel(a).got relocation | |
3569 | entry to initialize the value. This is done in the | |
3570 | finish_dynamic_symbol routine. */ | |
3571 | if ((off & 1) != 0) | |
3572 | off &= ~1; | |
3573 | else | |
3574 | { | |
3575 | bfd_put_64 (output_bfd, value, basegot->contents + off); | |
3576 | h->got.offset |= 1; | |
3577 | } | |
3578 | } | |
3579 | else | |
3580 | *unresolved_reloc_p = FALSE; | |
3581 | ||
3582 | off = off + basegot->output_section->vma + basegot->output_offset; | |
3583 | } | |
3584 | ||
3585 | return off; | |
3586 | } | |
3587 | ||
3588 | /* Change R_TYPE to a more efficient access model where possible, | |
3589 | return the new reloc type. */ | |
3590 | ||
3591 | static unsigned int | |
3592 | aarch64_tls_transition_without_check (unsigned int r_type, | |
3593 | struct elf_link_hash_entry *h) | |
3594 | { | |
3595 | bfd_boolean is_local = h == NULL; | |
3596 | switch (r_type) | |
3597 | { | |
3598 | case R_AARCH64_TLSGD_ADR_PAGE21: | |
3599 | case R_AARCH64_TLSDESC_ADR_PAGE: | |
3600 | return is_local | |
3601 | ? R_AARCH64_TLSLE_MOVW_TPREL_G1 : R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21; | |
3602 | ||
3603 | case R_AARCH64_TLSGD_ADD_LO12_NC: | |
3604 | case R_AARCH64_TLSDESC_LD64_LO12_NC: | |
3605 | return is_local | |
3606 | ? R_AARCH64_TLSLE_MOVW_TPREL_G0_NC | |
3607 | : R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC; | |
3608 | ||
3609 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
3610 | return is_local ? R_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type; | |
3611 | ||
3612 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
3613 | return is_local ? R_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type; | |
3614 | ||
3615 | case R_AARCH64_TLSDESC_ADD_LO12_NC: | |
3616 | case R_AARCH64_TLSDESC_CALL: | |
3617 | /* Instructions with these relocations will become NOPs. */ | |
3618 | return R_AARCH64_NONE; | |
3619 | } | |
3620 | ||
3621 | return r_type; | |
3622 | } | |
3623 | ||
3624 | static unsigned int | |
3625 | aarch64_reloc_got_type (unsigned int r_type) | |
3626 | { | |
3627 | switch (r_type) | |
3628 | { | |
3629 | case R_AARCH64_LD64_GOT_LO12_NC: | |
3630 | case R_AARCH64_ADR_GOT_PAGE: | |
f41aef5f | 3631 | case R_AARCH64_GOT_LD_PREL19: |
a06ea964 NC |
3632 | return GOT_NORMAL; |
3633 | ||
3634 | case R_AARCH64_TLSGD_ADR_PAGE21: | |
3635 | case R_AARCH64_TLSGD_ADD_LO12_NC: | |
3636 | return GOT_TLS_GD; | |
3637 | ||
3638 | case R_AARCH64_TLSDESC_ADD_LO12_NC: | |
3639 | case R_AARCH64_TLSDESC_ADR_PAGE: | |
3640 | case R_AARCH64_TLSDESC_CALL: | |
3641 | case R_AARCH64_TLSDESC_LD64_LO12_NC: | |
3642 | return GOT_TLSDESC_GD; | |
3643 | ||
3644 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
3645 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
3646 | return GOT_TLS_IE; | |
3647 | ||
3648 | case R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
3649 | case R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
3650 | case R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
3651 | case R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
3652 | case R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
3653 | case R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
3654 | case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
3655 | case R_AARCH64_TLSLE_MOVW_TPREL_G2: | |
3656 | return GOT_UNKNOWN; | |
3657 | } | |
3658 | return GOT_UNKNOWN; | |
3659 | } | |
3660 | ||
3661 | static bfd_boolean | |
3662 | aarch64_can_relax_tls (bfd *input_bfd, | |
3663 | struct bfd_link_info *info, | |
3664 | unsigned int r_type, | |
3665 | struct elf_link_hash_entry *h, | |
3666 | unsigned long r_symndx) | |
3667 | { | |
3668 | unsigned int symbol_got_type; | |
3669 | unsigned int reloc_got_type; | |
3670 | ||
3671 | if (! IS_AARCH64_TLS_RELOC (r_type)) | |
3672 | return FALSE; | |
3673 | ||
3674 | symbol_got_type = elf64_aarch64_symbol_got_type (h, input_bfd, r_symndx); | |
3675 | reloc_got_type = aarch64_reloc_got_type (r_type); | |
3676 | ||
3677 | if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type)) | |
3678 | return TRUE; | |
3679 | ||
3680 | if (info->shared) | |
3681 | return FALSE; | |
3682 | ||
3683 | if (h && h->root.type == bfd_link_hash_undefweak) | |
3684 | return FALSE; | |
3685 | ||
3686 | return TRUE; | |
3687 | } | |
3688 | ||
3689 | static unsigned int | |
3690 | aarch64_tls_transition (bfd *input_bfd, | |
3691 | struct bfd_link_info *info, | |
3692 | unsigned int r_type, | |
3693 | struct elf_link_hash_entry *h, | |
3694 | unsigned long r_symndx) | |
3695 | { | |
3696 | if (! aarch64_can_relax_tls (input_bfd, info, r_type, h, r_symndx)) | |
3697 | return r_type; | |
3698 | ||
3699 | return aarch64_tls_transition_without_check (r_type, h); | |
3700 | } | |
3701 | ||
3702 | /* Return the base VMA address which should be subtracted from real addresses | |
3703 | when resolving R_AARCH64_TLS_DTPREL64 relocation. */ | |
3704 | ||
3705 | static bfd_vma | |
3706 | dtpoff_base (struct bfd_link_info *info) | |
3707 | { | |
3708 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
3709 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); | |
3710 | return elf_hash_table (info)->tls_sec->vma; | |
3711 | } | |
3712 | ||
3713 | ||
3714 | /* Return the base VMA address which should be subtracted from real addresses | |
3715 | when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */ | |
3716 | ||
3717 | static bfd_vma | |
3718 | tpoff_base (struct bfd_link_info *info) | |
3719 | { | |
3720 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
3721 | ||
3722 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
3723 | if (htab->tls_sec == NULL) | |
3724 | return 0; | |
3725 | ||
3726 | bfd_vma base = align_power ((bfd_vma) TCB_SIZE, | |
3727 | htab->tls_sec->alignment_power); | |
3728 | return htab->tls_sec->vma - base; | |
3729 | } | |
3730 | ||
3731 | static bfd_vma * | |
3732 | symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3733 | unsigned long r_symndx) | |
3734 | { | |
3735 | /* Calculate the address of the GOT entry for symbol | |
3736 | referred to in h. */ | |
3737 | if (h != NULL) | |
3738 | return &h->got.offset; | |
3739 | else | |
3740 | { | |
3741 | /* local symbol */ | |
3742 | struct elf_aarch64_local_symbol *l; | |
3743 | ||
3744 | l = elf64_aarch64_locals (input_bfd); | |
3745 | return &l[r_symndx].got_offset; | |
3746 | } | |
3747 | } | |
3748 | ||
3749 | static void | |
3750 | symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3751 | unsigned long r_symndx) | |
3752 | { | |
3753 | bfd_vma *p; | |
3754 | p = symbol_got_offset_ref (input_bfd, h, r_symndx); | |
3755 | *p |= 1; | |
3756 | } | |
3757 | ||
3758 | static int | |
3759 | symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3760 | unsigned long r_symndx) | |
3761 | { | |
3762 | bfd_vma value; | |
3763 | value = * symbol_got_offset_ref (input_bfd, h, r_symndx); | |
3764 | return value & 1; | |
3765 | } | |
3766 | ||
3767 | static bfd_vma | |
3768 | symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3769 | unsigned long r_symndx) | |
3770 | { | |
3771 | bfd_vma value; | |
3772 | value = * symbol_got_offset_ref (input_bfd, h, r_symndx); | |
3773 | value &= ~1; | |
3774 | return value; | |
3775 | } | |
3776 | ||
3777 | static bfd_vma * | |
3778 | symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3779 | unsigned long r_symndx) | |
3780 | { | |
3781 | /* Calculate the address of the GOT entry for symbol | |
3782 | referred to in h. */ | |
3783 | if (h != NULL) | |
3784 | { | |
3785 | struct elf64_aarch64_link_hash_entry *eh; | |
3786 | eh = (struct elf64_aarch64_link_hash_entry *) h; | |
3787 | return &eh->tlsdesc_got_jump_table_offset; | |
3788 | } | |
3789 | else | |
3790 | { | |
3791 | /* local symbol */ | |
3792 | struct elf_aarch64_local_symbol *l; | |
3793 | ||
3794 | l = elf64_aarch64_locals (input_bfd); | |
3795 | return &l[r_symndx].tlsdesc_got_jump_table_offset; | |
3796 | } | |
3797 | } | |
3798 | ||
3799 | static void | |
3800 | symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3801 | unsigned long r_symndx) | |
3802 | { | |
3803 | bfd_vma *p; | |
3804 | p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); | |
3805 | *p |= 1; | |
3806 | } | |
3807 | ||
3808 | static int | |
3809 | symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd, | |
3810 | struct elf_link_hash_entry *h, | |
3811 | unsigned long r_symndx) | |
3812 | { | |
3813 | bfd_vma value; | |
3814 | value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); | |
3815 | return value & 1; | |
3816 | } | |
3817 | ||
3818 | static bfd_vma | |
3819 | symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, | |
3820 | unsigned long r_symndx) | |
3821 | { | |
3822 | bfd_vma value; | |
3823 | value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); | |
3824 | value &= ~1; | |
3825 | return value; | |
3826 | } | |
3827 | ||
3828 | /* Perform a relocation as part of a final link. */ | |
3829 | static bfd_reloc_status_type | |
3830 | elf64_aarch64_final_link_relocate (reloc_howto_type *howto, | |
3831 | bfd *input_bfd, | |
3832 | bfd *output_bfd, | |
3833 | asection *input_section, | |
3834 | bfd_byte *contents, | |
3835 | Elf_Internal_Rela *rel, | |
3836 | bfd_vma value, | |
3837 | struct bfd_link_info *info, | |
3838 | asection *sym_sec, | |
3839 | struct elf_link_hash_entry *h, | |
3840 | bfd_boolean *unresolved_reloc_p, | |
3841 | bfd_boolean save_addend, | |
3842 | bfd_vma *saved_addend) | |
3843 | { | |
3844 | unsigned int r_type = howto->type; | |
3845 | unsigned long r_symndx; | |
3846 | bfd_byte *hit_data = contents + rel->r_offset; | |
3847 | bfd_vma place; | |
3848 | bfd_signed_vma signed_addend; | |
3849 | struct elf64_aarch64_link_hash_table *globals; | |
3850 | bfd_boolean weak_undef_p; | |
3851 | ||
3852 | globals = elf64_aarch64_hash_table (info); | |
3853 | ||
3854 | BFD_ASSERT (is_aarch64_elf (input_bfd)); | |
3855 | ||
3856 | r_symndx = ELF64_R_SYM (rel->r_info); | |
3857 | ||
3858 | /* It is possible to have linker relaxations on some TLS access | |
3859 | models. Update our information here. */ | |
3860 | r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx); | |
3861 | ||
3862 | if (r_type != howto->type) | |
3863 | howto = elf64_aarch64_howto_from_type (r_type); | |
3864 | ||
3865 | place = input_section->output_section->vma | |
3866 | + input_section->output_offset + rel->r_offset; | |
3867 | ||
3868 | /* Get addend, accumulating the addend for consecutive relocs | |
3869 | which refer to the same offset. */ | |
3870 | signed_addend = saved_addend ? *saved_addend : 0; | |
3871 | signed_addend += rel->r_addend; | |
3872 | ||
3873 | weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak | |
3874 | : bfd_is_und_section (sym_sec)); | |
3875 | switch (r_type) | |
3876 | { | |
3877 | case R_AARCH64_NONE: | |
3878 | case R_AARCH64_NULL: | |
3879 | case R_AARCH64_TLSDESC_CALL: | |
3880 | *unresolved_reloc_p = FALSE; | |
3881 | return bfd_reloc_ok; | |
3882 | ||
3883 | case R_AARCH64_ABS64: | |
3884 | ||
3885 | /* When generating a shared object or relocatable executable, these | |
3886 | relocations are copied into the output file to be resolved at | |
3887 | run time. */ | |
3888 | if (((info->shared == TRUE) || globals->root.is_relocatable_executable) | |
3889 | && (input_section->flags & SEC_ALLOC) | |
3890 | && (h == NULL | |
3891 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3892 | || h->root.type != bfd_link_hash_undefweak)) | |
3893 | { | |
3894 | Elf_Internal_Rela outrel; | |
3895 | bfd_byte *loc; | |
3896 | bfd_boolean skip, relocate; | |
3897 | asection *sreloc; | |
3898 | ||
3899 | *unresolved_reloc_p = FALSE; | |
3900 | ||
3901 | sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd, | |
3902 | input_section, 1); | |
3903 | if (sreloc == NULL) | |
3904 | return bfd_reloc_notsupported; | |
3905 | ||
3906 | skip = FALSE; | |
3907 | relocate = FALSE; | |
3908 | ||
3909 | outrel.r_addend = signed_addend; | |
3910 | outrel.r_offset = | |
3911 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
3912 | rel->r_offset); | |
3913 | if (outrel.r_offset == (bfd_vma) - 1) | |
3914 | skip = TRUE; | |
3915 | else if (outrel.r_offset == (bfd_vma) - 2) | |
3916 | { | |
3917 | skip = TRUE; | |
3918 | relocate = TRUE; | |
3919 | } | |
3920 | ||
3921 | outrel.r_offset += (input_section->output_section->vma | |
3922 | + input_section->output_offset); | |
3923 | ||
3924 | if (skip) | |
3925 | memset (&outrel, 0, sizeof outrel); | |
3926 | else if (h != NULL | |
3927 | && h->dynindx != -1 | |
3928 | && (!info->shared || !info->symbolic || !h->def_regular)) | |
3929 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); | |
3930 | else | |
3931 | { | |
3932 | int symbol; | |
3933 | ||
3934 | /* On SVR4-ish systems, the dynamic loader cannot | |
3935 | relocate the text and data segments independently, | |
3936 | so the symbol does not matter. */ | |
3937 | symbol = 0; | |
3938 | outrel.r_info = ELF64_R_INFO (symbol, R_AARCH64_RELATIVE); | |
3939 | outrel.r_addend += value; | |
3940 | } | |
3941 | ||
3942 | loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (htab); | |
3943 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
3944 | ||
3945 | if (sreloc->reloc_count * RELOC_SIZE (htab) > sreloc->size) | |
3946 | { | |
3947 | /* Sanity to check that we have previously allocated | |
3948 | sufficient space in the relocation section for the | |
3949 | number of relocations we actually want to emit. */ | |
3950 | abort (); | |
3951 | } | |
3952 | ||
3953 | /* If this reloc is against an external symbol, we do not want to | |
3954 | fiddle with the addend. Otherwise, we need to include the symbol | |
3955 | value so that it becomes an addend for the dynamic reloc. */ | |
3956 | if (!relocate) | |
3957 | return bfd_reloc_ok; | |
3958 | ||
3959 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3960 | contents, rel->r_offset, value, | |
3961 | signed_addend); | |
3962 | } | |
3963 | else | |
3964 | value += signed_addend; | |
3965 | break; | |
3966 | ||
3967 | case R_AARCH64_JUMP26: | |
3968 | case R_AARCH64_CALL26: | |
3969 | { | |
3970 | asection *splt = globals->root.splt; | |
3971 | bfd_boolean via_plt_p = | |
3972 | splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1; | |
3973 | ||
3974 | /* A call to an undefined weak symbol is converted to a jump to | |
3975 | the next instruction unless a PLT entry will be created. | |
3976 | The jump to the next instruction is optimized as a NOP. | |
3977 | Do the same for local undefined symbols. */ | |
3978 | if (weak_undef_p && ! via_plt_p) | |
3979 | { | |
3980 | bfd_putl32 (INSN_NOP, hit_data); | |
3981 | return bfd_reloc_ok; | |
3982 | } | |
3983 | ||
3984 | /* If the call goes through a PLT entry, make sure to | |
3985 | check distance to the right destination address. */ | |
3986 | if (via_plt_p) | |
3987 | { | |
3988 | value = (splt->output_section->vma | |
3989 | + splt->output_offset + h->plt.offset); | |
3990 | *unresolved_reloc_p = FALSE; | |
3991 | } | |
3992 | ||
3993 | /* If the target symbol is global and marked as a function the | |
3994 | relocation applies a function call or a tail call. In this | |
3995 | situation we can veneer out of range branches. The veneers | |
3996 | use IP0 and IP1 hence cannot be used arbitrary out of range | |
3997 | branches that occur within the body of a function. */ | |
3998 | if (h && h->type == STT_FUNC) | |
3999 | { | |
4000 | /* Check if a stub has to be inserted because the destination | |
4001 | is too far away. */ | |
4002 | if (! aarch64_valid_branch_p (value, place)) | |
4003 | { | |
4004 | /* The target is out of reach, so redirect the branch to | |
4005 | the local stub for this function. */ | |
4006 | struct elf64_aarch64_stub_hash_entry *stub_entry; | |
4007 | stub_entry = elf64_aarch64_get_stub_entry (input_section, | |
4008 | sym_sec, h, | |
4009 | rel, globals); | |
4010 | if (stub_entry != NULL) | |
4011 | value = (stub_entry->stub_offset | |
4012 | + stub_entry->stub_sec->output_offset | |
4013 | + stub_entry->stub_sec->output_section->vma); | |
4014 | } | |
4015 | } | |
4016 | } | |
4017 | value = aarch64_resolve_relocation (r_type, place, value, | |
4018 | signed_addend, weak_undef_p); | |
4019 | break; | |
4020 | ||
4021 | case R_AARCH64_ABS16: | |
4022 | case R_AARCH64_ABS32: | |
4023 | case R_AARCH64_ADD_ABS_LO12_NC: | |
4024 | case R_AARCH64_ADR_PREL_LO21: | |
4025 | case R_AARCH64_ADR_PREL_PG_HI21: | |
4026 | case R_AARCH64_ADR_PREL_PG_HI21_NC: | |
4027 | case R_AARCH64_CONDBR19: | |
4028 | case R_AARCH64_LD_PREL_LO19: | |
4029 | case R_AARCH64_LDST8_ABS_LO12_NC: | |
4030 | case R_AARCH64_LDST16_ABS_LO12_NC: | |
4031 | case R_AARCH64_LDST32_ABS_LO12_NC: | |
4032 | case R_AARCH64_LDST64_ABS_LO12_NC: | |
4033 | case R_AARCH64_LDST128_ABS_LO12_NC: | |
4034 | case R_AARCH64_MOVW_SABS_G0: | |
4035 | case R_AARCH64_MOVW_SABS_G1: | |
4036 | case R_AARCH64_MOVW_SABS_G2: | |
4037 | case R_AARCH64_MOVW_UABS_G0: | |
4038 | case R_AARCH64_MOVW_UABS_G0_NC: | |
4039 | case R_AARCH64_MOVW_UABS_G1: | |
4040 | case R_AARCH64_MOVW_UABS_G1_NC: | |
4041 | case R_AARCH64_MOVW_UABS_G2: | |
4042 | case R_AARCH64_MOVW_UABS_G2_NC: | |
4043 | case R_AARCH64_MOVW_UABS_G3: | |
4044 | case R_AARCH64_PREL16: | |
4045 | case R_AARCH64_PREL32: | |
4046 | case R_AARCH64_PREL64: | |
4047 | case R_AARCH64_TSTBR14: | |
4048 | value = aarch64_resolve_relocation (r_type, place, value, | |
4049 | signed_addend, weak_undef_p); | |
4050 | break; | |
4051 | ||
4052 | case R_AARCH64_LD64_GOT_LO12_NC: | |
4053 | case R_AARCH64_ADR_GOT_PAGE: | |
f41aef5f | 4054 | case R_AARCH64_GOT_LD_PREL19: |
a06ea964 NC |
4055 | if (globals->root.sgot == NULL) |
4056 | BFD_ASSERT (h != NULL); | |
4057 | ||
4058 | if (h != NULL) | |
4059 | { | |
4060 | value = aarch64_calculate_got_entry_vma (h, globals, info, value, | |
4061 | output_bfd, | |
4062 | unresolved_reloc_p); | |
4063 | value = aarch64_resolve_relocation (r_type, place, value, | |
4064 | 0, weak_undef_p); | |
4065 | } | |
4066 | break; | |
4067 | ||
4068 | case R_AARCH64_TLSGD_ADR_PAGE21: | |
4069 | case R_AARCH64_TLSGD_ADD_LO12_NC: | |
4070 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
4071 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
4072 | if (globals->root.sgot == NULL) | |
4073 | return bfd_reloc_notsupported; | |
4074 | ||
4075 | value = (symbol_got_offset (input_bfd, h, r_symndx) | |
4076 | + globals->root.sgot->output_section->vma | |
4077 | + globals->root.sgot->output_section->output_offset); | |
4078 | ||
4079 | value = aarch64_resolve_relocation (r_type, place, value, | |
4080 | 0, weak_undef_p); | |
4081 | *unresolved_reloc_p = FALSE; | |
4082 | break; | |
4083 | ||
4084 | case R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
4085 | case R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
4086 | case R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
4087 | case R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
4088 | case R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
4089 | case R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
4090 | case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
4091 | case R_AARCH64_TLSLE_MOVW_TPREL_G2: | |
4092 | value = aarch64_resolve_relocation (r_type, place, value, | |
bb3f9ed8 | 4093 | signed_addend - tpoff_base (info), weak_undef_p); |
a06ea964 NC |
4094 | *unresolved_reloc_p = FALSE; |
4095 | break; | |
4096 | ||
4097 | case R_AARCH64_TLSDESC_ADR_PAGE: | |
4098 | case R_AARCH64_TLSDESC_LD64_LO12_NC: | |
4099 | case R_AARCH64_TLSDESC_ADD_LO12_NC: | |
4100 | case R_AARCH64_TLSDESC_ADD: | |
4101 | case R_AARCH64_TLSDESC_LDR: | |
4102 | if (globals->root.sgot == NULL) | |
4103 | return bfd_reloc_notsupported; | |
4104 | ||
4105 | value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx) | |
4106 | + globals->root.sgotplt->output_section->vma | |
4107 | + globals->root.sgotplt->output_section->output_offset | |
4108 | + globals->sgotplt_jump_table_size); | |
4109 | ||
4110 | value = aarch64_resolve_relocation (r_type, place, value, | |
4111 | 0, weak_undef_p); | |
4112 | *unresolved_reloc_p = FALSE; | |
4113 | break; | |
4114 | ||
4115 | default: | |
4116 | return bfd_reloc_notsupported; | |
4117 | } | |
4118 | ||
4119 | if (saved_addend) | |
4120 | *saved_addend = value; | |
4121 | ||
4122 | /* Only apply the final relocation in a sequence. */ | |
4123 | if (save_addend) | |
4124 | return bfd_reloc_continue; | |
4125 | ||
4126 | return bfd_elf_aarch64_put_addend (input_bfd, hit_data, howto, value); | |
4127 | } | |
4128 | ||
4129 | /* Handle TLS relaxations. Relaxing is possible for symbols that use | |
4130 | R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static | |
4131 | link. | |
4132 | ||
4133 | Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller | |
4134 | is to then call final_link_relocate. Return other values in the | |
4135 | case of error. */ | |
4136 | ||
4137 | static bfd_reloc_status_type | |
4138 | elf64_aarch64_tls_relax (struct elf64_aarch64_link_hash_table *globals, | |
4139 | bfd *input_bfd, bfd_byte *contents, | |
4140 | Elf_Internal_Rela *rel, struct elf_link_hash_entry *h) | |
4141 | { | |
4142 | bfd_boolean is_local = h == NULL; | |
4143 | unsigned int r_type = ELF64_R_TYPE (rel->r_info); | |
4144 | unsigned long insn; | |
4145 | ||
4146 | BFD_ASSERT (globals && input_bfd && contents && rel); | |
4147 | ||
4148 | switch (r_type) | |
4149 | { | |
4150 | case R_AARCH64_TLSGD_ADR_PAGE21: | |
4151 | case R_AARCH64_TLSDESC_ADR_PAGE: | |
4152 | if (is_local) | |
4153 | { | |
4154 | /* GD->LE relaxation: | |
4155 | adrp x0, :tlsgd:var => movz x0, :tprel_g1:var | |
4156 | or | |
4157 | adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var | |
4158 | */ | |
4159 | bfd_putl32 (0xd2a00000, contents + rel->r_offset); | |
4160 | return bfd_reloc_continue; | |
4161 | } | |
4162 | else | |
4163 | { | |
4164 | /* GD->IE relaxation: | |
4165 | adrp x0, :tlsgd:var => adrp x0, :gottprel:var | |
4166 | or | |
4167 | adrp x0, :tlsdesc:var => adrp x0, :gottprel:var | |
4168 | */ | |
4169 | insn = bfd_getl32 (contents + rel->r_offset); | |
4170 | return bfd_reloc_continue; | |
4171 | } | |
4172 | ||
4173 | case R_AARCH64_TLSDESC_LD64_LO12_NC: | |
4174 | if (is_local) | |
4175 | { | |
4176 | /* GD->LE relaxation: | |
4177 | ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var | |
4178 | */ | |
4179 | bfd_putl32 (0xf2800000, contents + rel->r_offset); | |
4180 | return bfd_reloc_continue; | |
4181 | } | |
4182 | else | |
4183 | { | |
4184 | /* GD->IE relaxation: | |
4185 | ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var] | |
4186 | */ | |
4187 | insn = bfd_getl32 (contents + rel->r_offset); | |
4188 | insn &= 0xfffffff0; | |
4189 | bfd_putl32 (insn, contents + rel->r_offset); | |
4190 | return bfd_reloc_continue; | |
4191 | } | |
4192 | ||
4193 | case R_AARCH64_TLSGD_ADD_LO12_NC: | |
4194 | if (is_local) | |
4195 | { | |
4196 | /* GD->LE relaxation | |
4197 | add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var | |
4198 | bl __tls_get_addr => mrs x1, tpidr_el0 | |
4199 | nop => add x0, x1, x0 | |
4200 | */ | |
4201 | ||
4202 | /* First kill the tls_get_addr reloc on the bl instruction. */ | |
4203 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); | |
4204 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_AARCH64_NONE); | |
4205 | ||
4206 | bfd_putl32 (0xf2800000, contents + rel->r_offset); | |
4207 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4); | |
4208 | bfd_putl32 (0x8b000020, contents + rel->r_offset + 8); | |
4209 | return bfd_reloc_continue; | |
4210 | } | |
4211 | else | |
4212 | { | |
4213 | /* GD->IE relaxation | |
4214 | ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var] | |
4215 | BL __tls_get_addr => mrs x1, tpidr_el0 | |
4216 | R_AARCH64_CALL26 | |
4217 | NOP => add x0, x1, x0 | |
4218 | */ | |
4219 | ||
4220 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_AARCH64_CALL26); | |
4221 | ||
4222 | /* Remove the relocation on the BL instruction. */ | |
4223 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_AARCH64_NONE); | |
4224 | ||
4225 | bfd_putl32 (0xf9400000, contents + rel->r_offset); | |
4226 | ||
4227 | /* We choose to fixup the BL and NOP instructions using the | |
4228 | offset from the second relocation to allow flexibility in | |
4229 | scheduling instructions between the ADD and BL. */ | |
4230 | bfd_putl32 (0xd53bd041, contents + rel[1].r_offset); | |
4231 | bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4); | |
4232 | return bfd_reloc_continue; | |
4233 | } | |
4234 | ||
4235 | case R_AARCH64_TLSDESC_ADD_LO12_NC: | |
4236 | case R_AARCH64_TLSDESC_CALL: | |
4237 | /* GD->IE/LE relaxation: | |
4238 | add x0, x0, #:tlsdesc_lo12:var => nop | |
4239 | blr xd => nop | |
4240 | */ | |
4241 | bfd_putl32 (INSN_NOP, contents + rel->r_offset); | |
4242 | return bfd_reloc_ok; | |
4243 | ||
4244 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
4245 | /* IE->LE relaxation: | |
4246 | adrp xd, :gottprel:var => movz xd, :tprel_g1:var | |
4247 | */ | |
4248 | if (is_local) | |
4249 | { | |
4250 | insn = bfd_getl32 (contents + rel->r_offset); | |
4251 | bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset); | |
4252 | } | |
4253 | return bfd_reloc_continue; | |
4254 | ||
4255 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
4256 | /* IE->LE relaxation: | |
4257 | ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var | |
4258 | */ | |
4259 | if (is_local) | |
4260 | { | |
4261 | insn = bfd_getl32 (contents + rel->r_offset); | |
4262 | bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset); | |
4263 | } | |
4264 | return bfd_reloc_continue; | |
4265 | ||
4266 | default: | |
4267 | return bfd_reloc_continue; | |
4268 | } | |
4269 | ||
4270 | return bfd_reloc_ok; | |
4271 | } | |
4272 | ||
4273 | /* Relocate an AArch64 ELF section. */ | |
4274 | ||
4275 | static bfd_boolean | |
4276 | elf64_aarch64_relocate_section (bfd *output_bfd, | |
4277 | struct bfd_link_info *info, | |
4278 | bfd *input_bfd, | |
4279 | asection *input_section, | |
4280 | bfd_byte *contents, | |
4281 | Elf_Internal_Rela *relocs, | |
4282 | Elf_Internal_Sym *local_syms, | |
4283 | asection **local_sections) | |
4284 | { | |
4285 | Elf_Internal_Shdr *symtab_hdr; | |
4286 | struct elf_link_hash_entry **sym_hashes; | |
4287 | Elf_Internal_Rela *rel; | |
4288 | Elf_Internal_Rela *relend; | |
4289 | const char *name; | |
4290 | struct elf64_aarch64_link_hash_table *globals; | |
4291 | bfd_boolean save_addend = FALSE; | |
4292 | bfd_vma addend = 0; | |
4293 | ||
4294 | globals = elf64_aarch64_hash_table (info); | |
4295 | ||
4296 | symtab_hdr = &elf_symtab_hdr (input_bfd); | |
4297 | sym_hashes = elf_sym_hashes (input_bfd); | |
4298 | ||
4299 | rel = relocs; | |
4300 | relend = relocs + input_section->reloc_count; | |
4301 | for (; rel < relend; rel++) | |
4302 | { | |
4303 | unsigned int r_type; | |
4304 | unsigned int relaxed_r_type; | |
4305 | reloc_howto_type *howto; | |
4306 | unsigned long r_symndx; | |
4307 | Elf_Internal_Sym *sym; | |
4308 | asection *sec; | |
4309 | struct elf_link_hash_entry *h; | |
4310 | bfd_vma relocation; | |
4311 | bfd_reloc_status_type r; | |
4312 | arelent bfd_reloc; | |
4313 | char sym_type; | |
4314 | bfd_boolean unresolved_reloc = FALSE; | |
4315 | char *error_message = NULL; | |
4316 | ||
4317 | r_symndx = ELF64_R_SYM (rel->r_info); | |
4318 | r_type = ELF64_R_TYPE (rel->r_info); | |
4319 | ||
4320 | bfd_reloc.howto = elf64_aarch64_howto_from_type (r_type); | |
4321 | howto = bfd_reloc.howto; | |
4322 | ||
4323 | h = NULL; | |
4324 | sym = NULL; | |
4325 | sec = NULL; | |
4326 | ||
4327 | if (r_symndx < symtab_hdr->sh_info) | |
4328 | { | |
4329 | sym = local_syms + r_symndx; | |
4330 | sym_type = ELF64_ST_TYPE (sym->st_info); | |
4331 | sec = local_sections[r_symndx]; | |
4332 | ||
4333 | /* An object file might have a reference to a local | |
4334 | undefined symbol. This is a daft object file, but we | |
4335 | should at least do something about it. */ | |
4336 | if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL | |
4337 | && bfd_is_und_section (sec) | |
4338 | && ELF_ST_BIND (sym->st_info) != STB_WEAK) | |
4339 | { | |
4340 | if (!info->callbacks->undefined_symbol | |
4341 | (info, bfd_elf_string_from_elf_section | |
4342 | (input_bfd, symtab_hdr->sh_link, sym->st_name), | |
4343 | input_bfd, input_section, rel->r_offset, TRUE)) | |
4344 | return FALSE; | |
4345 | } | |
4346 | ||
4347 | if (r_type >= R_AARCH64_dyn_max) | |
4348 | { | |
4349 | bfd_set_error (bfd_error_bad_value); | |
4350 | return FALSE; | |
4351 | } | |
4352 | ||
4353 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
4354 | } | |
4355 | else | |
4356 | { | |
4357 | bfd_boolean warned; | |
4358 | ||
4359 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
4360 | r_symndx, symtab_hdr, sym_hashes, | |
4361 | h, sec, relocation, | |
4362 | unresolved_reloc, warned); | |
4363 | ||
4364 | sym_type = h->type; | |
4365 | } | |
4366 | ||
4367 | if (sec != NULL && discarded_section (sec)) | |
4368 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
4369 | rel, 1, relend, howto, 0, contents); | |
4370 | ||
4371 | if (info->relocatable) | |
4372 | { | |
4373 | /* This is a relocatable link. We don't have to change | |
4374 | anything, unless the reloc is against a section symbol, | |
4375 | in which case we have to adjust according to where the | |
4376 | section symbol winds up in the output section. */ | |
4377 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
4378 | rel->r_addend += sec->output_offset; | |
4379 | continue; | |
4380 | } | |
4381 | ||
4382 | if (h != NULL) | |
4383 | name = h->root.root.string; | |
4384 | else | |
4385 | { | |
4386 | name = (bfd_elf_string_from_elf_section | |
4387 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
4388 | if (name == NULL || *name == '\0') | |
4389 | name = bfd_section_name (input_bfd, sec); | |
4390 | } | |
4391 | ||
4392 | if (r_symndx != 0 | |
4393 | && r_type != R_AARCH64_NONE | |
4394 | && r_type != R_AARCH64_NULL | |
4395 | && (h == NULL | |
4396 | || h->root.type == bfd_link_hash_defined | |
4397 | || h->root.type == bfd_link_hash_defweak) | |
4398 | && IS_AARCH64_TLS_RELOC (r_type) != (sym_type == STT_TLS)) | |
4399 | { | |
4400 | (*_bfd_error_handler) | |
4401 | ((sym_type == STT_TLS | |
4402 | ? _("%B(%A+0x%lx): %s used with TLS symbol %s") | |
4403 | : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), | |
4404 | input_bfd, | |
4405 | input_section, (long) rel->r_offset, howto->name, name); | |
4406 | } | |
4407 | ||
4408 | ||
4409 | /* We relax only if we can see that there can be a valid transition | |
4410 | from a reloc type to another. | |
4411 | We call elf64_aarch64_final_link_relocate unless we're completely | |
4412 | done, i.e., the relaxation produced the final output we want. */ | |
4413 | ||
4414 | relaxed_r_type = aarch64_tls_transition (input_bfd, info, r_type, | |
4415 | h, r_symndx); | |
4416 | if (relaxed_r_type != r_type) | |
4417 | { | |
4418 | r_type = relaxed_r_type; | |
4419 | howto = elf64_aarch64_howto_from_type (r_type); | |
4420 | ||
4421 | r = elf64_aarch64_tls_relax (globals, input_bfd, contents, rel, h); | |
4422 | unresolved_reloc = 0; | |
4423 | } | |
4424 | else | |
4425 | r = bfd_reloc_continue; | |
4426 | ||
4427 | /* There may be multiple consecutive relocations for the | |
4428 | same offset. In that case we are supposed to treat the | |
4429 | output of each relocation as the addend for the next. */ | |
4430 | if (rel + 1 < relend | |
4431 | && rel->r_offset == rel[1].r_offset | |
4432 | && ELF64_R_TYPE (rel[1].r_info) != R_AARCH64_NONE | |
4433 | && ELF64_R_TYPE (rel[1].r_info) != R_AARCH64_NULL) | |
4434 | save_addend = TRUE; | |
4435 | else | |
4436 | save_addend = FALSE; | |
4437 | ||
4438 | if (r == bfd_reloc_continue) | |
4439 | r = elf64_aarch64_final_link_relocate (howto, input_bfd, output_bfd, | |
4440 | input_section, contents, rel, | |
4441 | relocation, info, sec, | |
4442 | h, &unresolved_reloc, | |
4443 | save_addend, &addend); | |
4444 | ||
4445 | switch (r_type) | |
4446 | { | |
4447 | case R_AARCH64_TLSGD_ADR_PAGE21: | |
4448 | case R_AARCH64_TLSGD_ADD_LO12_NC: | |
4449 | if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) | |
4450 | { | |
4451 | bfd_boolean need_relocs = FALSE; | |
4452 | bfd_byte *loc; | |
4453 | int indx; | |
4454 | bfd_vma off; | |
4455 | ||
4456 | off = symbol_got_offset (input_bfd, h, r_symndx); | |
4457 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
4458 | ||
4459 | need_relocs = | |
4460 | (info->shared || indx != 0) && | |
4461 | (h == NULL | |
4462 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
4463 | || h->root.type != bfd_link_hash_undefweak); | |
4464 | ||
4465 | BFD_ASSERT (globals->root.srelgot != NULL); | |
4466 | ||
4467 | if (need_relocs) | |
4468 | { | |
4469 | Elf_Internal_Rela rela; | |
4470 | rela.r_info = ELF64_R_INFO (indx, R_AARCH64_TLS_DTPMOD64); | |
4471 | rela.r_addend = 0; | |
4472 | rela.r_offset = globals->root.sgot->output_section->vma + | |
4473 | globals->root.sgot->output_offset + off; | |
4474 | ||
4475 | ||
4476 | loc = globals->root.srelgot->contents; | |
4477 | loc += globals->root.srelgot->reloc_count++ | |
4478 | * RELOC_SIZE (htab); | |
4479 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); | |
4480 | ||
4481 | if (indx == 0) | |
4482 | { | |
4483 | bfd_put_64 (output_bfd, | |
4484 | relocation - dtpoff_base (info), | |
4485 | globals->root.sgot->contents + off | |
4486 | + GOT_ENTRY_SIZE); | |
4487 | } | |
4488 | else | |
4489 | { | |
4490 | /* This TLS symbol is global. We emit a | |
4491 | relocation to fixup the tls offset at load | |
4492 | time. */ | |
4493 | rela.r_info = | |
4494 | ELF64_R_INFO (indx, R_AARCH64_TLS_DTPREL64); | |
4495 | rela.r_addend = 0; | |
4496 | rela.r_offset = | |
4497 | (globals->root.sgot->output_section->vma | |
4498 | + globals->root.sgot->output_offset + off | |
4499 | + GOT_ENTRY_SIZE); | |
4500 | ||
4501 | loc = globals->root.srelgot->contents; | |
4502 | loc += globals->root.srelgot->reloc_count++ | |
4503 | * RELOC_SIZE (globals); | |
4504 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); | |
4505 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
4506 | globals->root.sgot->contents + off | |
4507 | + GOT_ENTRY_SIZE); | |
4508 | } | |
4509 | } | |
4510 | else | |
4511 | { | |
4512 | bfd_put_64 (output_bfd, (bfd_vma) 1, | |
4513 | globals->root.sgot->contents + off); | |
4514 | bfd_put_64 (output_bfd, | |
4515 | relocation - dtpoff_base (info), | |
4516 | globals->root.sgot->contents + off | |
4517 | + GOT_ENTRY_SIZE); | |
4518 | } | |
4519 | ||
4520 | symbol_got_offset_mark (input_bfd, h, r_symndx); | |
4521 | } | |
4522 | break; | |
4523 | ||
4524 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
4525 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
4526 | if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) | |
4527 | { | |
4528 | bfd_boolean need_relocs = FALSE; | |
4529 | bfd_byte *loc; | |
4530 | int indx; | |
4531 | bfd_vma off; | |
4532 | ||
4533 | off = symbol_got_offset (input_bfd, h, r_symndx); | |
4534 | ||
4535 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
4536 | ||
4537 | need_relocs = | |
4538 | (info->shared || indx != 0) && | |
4539 | (h == NULL | |
4540 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
4541 | || h->root.type != bfd_link_hash_undefweak); | |
4542 | ||
4543 | BFD_ASSERT (globals->root.srelgot != NULL); | |
4544 | ||
4545 | if (need_relocs) | |
4546 | { | |
4547 | Elf_Internal_Rela rela; | |
4548 | ||
4549 | if (indx == 0) | |
4550 | rela.r_addend = relocation - dtpoff_base (info); | |
4551 | else | |
4552 | rela.r_addend = 0; | |
4553 | ||
4554 | rela.r_info = ELF64_R_INFO (indx, R_AARCH64_TLS_TPREL64); | |
4555 | rela.r_offset = globals->root.sgot->output_section->vma + | |
4556 | globals->root.sgot->output_offset + off; | |
4557 | ||
4558 | loc = globals->root.srelgot->contents; | |
4559 | loc += globals->root.srelgot->reloc_count++ | |
4560 | * RELOC_SIZE (htab); | |
4561 | ||
4562 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); | |
4563 | ||
4564 | bfd_put_64 (output_bfd, rela.r_addend, | |
4565 | globals->root.sgot->contents + off); | |
4566 | } | |
4567 | else | |
4568 | bfd_put_64 (output_bfd, relocation - tpoff_base (info), | |
4569 | globals->root.sgot->contents + off); | |
4570 | ||
4571 | symbol_got_offset_mark (input_bfd, h, r_symndx); | |
4572 | } | |
4573 | break; | |
4574 | ||
4575 | case R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
4576 | case R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
4577 | case R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
4578 | case R_AARCH64_TLSLE_MOVW_TPREL_G2: | |
4579 | case R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
4580 | case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
4581 | case R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
4582 | case R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
4583 | break; | |
4584 | ||
4585 | case R_AARCH64_TLSDESC_ADR_PAGE: | |
4586 | case R_AARCH64_TLSDESC_LD64_LO12_NC: | |
4587 | case R_AARCH64_TLSDESC_ADD_LO12_NC: | |
4588 | if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx)) | |
4589 | { | |
4590 | bfd_boolean need_relocs = FALSE; | |
4591 | int indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
4592 | bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx); | |
4593 | ||
4594 | need_relocs = (h == NULL | |
4595 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
4596 | || h->root.type != bfd_link_hash_undefweak); | |
4597 | ||
4598 | BFD_ASSERT (globals->root.srelgot != NULL); | |
4599 | BFD_ASSERT (globals->root.sgot != NULL); | |
4600 | ||
4601 | if (need_relocs) | |
4602 | { | |
4603 | bfd_byte *loc; | |
4604 | Elf_Internal_Rela rela; | |
4605 | rela.r_info = ELF64_R_INFO (indx, R_AARCH64_TLSDESC); | |
4606 | rela.r_addend = 0; | |
4607 | rela.r_offset = (globals->root.sgotplt->output_section->vma | |
4608 | + globals->root.sgotplt->output_offset | |
4609 | + off + globals->sgotplt_jump_table_size); | |
4610 | ||
4611 | if (indx == 0) | |
4612 | rela.r_addend = relocation - dtpoff_base (info); | |
4613 | ||
4614 | /* Allocate the next available slot in the PLT reloc | |
4615 | section to hold our R_AARCH64_TLSDESC, the next | |
4616 | available slot is determined from reloc_count, | |
4617 | which we step. But note, reloc_count was | |
4618 | artifically moved down while allocating slots for | |
4619 | real PLT relocs such that all of the PLT relocs | |
4620 | will fit above the initial reloc_count and the | |
4621 | extra stuff will fit below. */ | |
4622 | loc = globals->root.srelplt->contents; | |
4623 | loc += globals->root.srelplt->reloc_count++ | |
4624 | * RELOC_SIZE (globals); | |
4625 | ||
4626 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); | |
4627 | ||
4628 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
4629 | globals->root.sgotplt->contents + off + | |
4630 | globals->sgotplt_jump_table_size); | |
4631 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
4632 | globals->root.sgotplt->contents + off + | |
4633 | globals->sgotplt_jump_table_size + | |
4634 | GOT_ENTRY_SIZE); | |
4635 | } | |
4636 | ||
4637 | symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx); | |
4638 | } | |
4639 | break; | |
4640 | } | |
4641 | ||
4642 | if (!save_addend) | |
4643 | addend = 0; | |
4644 | ||
4645 | ||
4646 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections | |
4647 | because such sections are not SEC_ALLOC and thus ld.so will | |
4648 | not process them. */ | |
4649 | if (unresolved_reloc | |
4650 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
4651 | && h->def_dynamic) | |
4652 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4653 | +rel->r_offset) != (bfd_vma) - 1) | |
4654 | { | |
4655 | (*_bfd_error_handler) | |
4656 | (_ | |
4657 | ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
4658 | input_bfd, input_section, (long) rel->r_offset, howto->name, | |
4659 | h->root.root.string); | |
4660 | return FALSE; | |
4661 | } | |
4662 | ||
4663 | if (r != bfd_reloc_ok && r != bfd_reloc_continue) | |
4664 | { | |
4665 | switch (r) | |
4666 | { | |
4667 | case bfd_reloc_overflow: | |
4668 | /* If the overflowing reloc was to an undefined symbol, | |
4669 | we have already printed one error message and there | |
4670 | is no point complaining again. */ | |
4671 | if ((!h || | |
4672 | h->root.type != bfd_link_hash_undefined) | |
4673 | && (!((*info->callbacks->reloc_overflow) | |
4674 | (info, (h ? &h->root : NULL), name, howto->name, | |
4675 | (bfd_vma) 0, input_bfd, input_section, | |
4676 | rel->r_offset)))) | |
4677 | return FALSE; | |
4678 | break; | |
4679 | ||
4680 | case bfd_reloc_undefined: | |
4681 | if (!((*info->callbacks->undefined_symbol) | |
4682 | (info, name, input_bfd, input_section, | |
4683 | rel->r_offset, TRUE))) | |
4684 | return FALSE; | |
4685 | break; | |
4686 | ||
4687 | case bfd_reloc_outofrange: | |
4688 | error_message = _("out of range"); | |
4689 | goto common_error; | |
4690 | ||
4691 | case bfd_reloc_notsupported: | |
4692 | error_message = _("unsupported relocation"); | |
4693 | goto common_error; | |
4694 | ||
4695 | case bfd_reloc_dangerous: | |
4696 | /* error_message should already be set. */ | |
4697 | goto common_error; | |
4698 | ||
4699 | default: | |
4700 | error_message = _("unknown error"); | |
4701 | /* Fall through. */ | |
4702 | ||
4703 | common_error: | |
4704 | BFD_ASSERT (error_message != NULL); | |
4705 | if (!((*info->callbacks->reloc_dangerous) | |
4706 | (info, error_message, input_bfd, input_section, | |
4707 | rel->r_offset))) | |
4708 | return FALSE; | |
4709 | break; | |
4710 | } | |
4711 | } | |
4712 | } | |
4713 | ||
4714 | return TRUE; | |
4715 | } | |
4716 | ||
4717 | /* Set the right machine number. */ | |
4718 | ||
4719 | static bfd_boolean | |
4720 | elf64_aarch64_object_p (bfd *abfd) | |
4721 | { | |
4722 | bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64); | |
4723 | return TRUE; | |
4724 | } | |
4725 | ||
4726 | /* Function to keep AArch64 specific flags in the ELF header. */ | |
4727 | ||
4728 | static bfd_boolean | |
4729 | elf64_aarch64_set_private_flags (bfd *abfd, flagword flags) | |
4730 | { | |
4731 | if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags) | |
4732 | { | |
4733 | } | |
4734 | else | |
4735 | { | |
4736 | elf_elfheader (abfd)->e_flags = flags; | |
4737 | elf_flags_init (abfd) = TRUE; | |
4738 | } | |
4739 | ||
4740 | return TRUE; | |
4741 | } | |
4742 | ||
4743 | /* Copy backend specific data from one object module to another. */ | |
4744 | ||
4745 | static bfd_boolean | |
4746 | elf64_aarch64_copy_private_bfd_data (bfd *ibfd, bfd *obfd) | |
4747 | { | |
4748 | flagword in_flags; | |
4749 | ||
4750 | if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd)) | |
4751 | return TRUE; | |
4752 | ||
4753 | in_flags = elf_elfheader (ibfd)->e_flags; | |
4754 | ||
4755 | elf_elfheader (obfd)->e_flags = in_flags; | |
4756 | elf_flags_init (obfd) = TRUE; | |
4757 | ||
4758 | /* Also copy the EI_OSABI field. */ | |
4759 | elf_elfheader (obfd)->e_ident[EI_OSABI] = | |
4760 | elf_elfheader (ibfd)->e_ident[EI_OSABI]; | |
4761 | ||
4762 | /* Copy object attributes. */ | |
4763 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
4764 | ||
4765 | return TRUE; | |
4766 | } | |
4767 | ||
4768 | /* Merge backend specific data from an object file to the output | |
4769 | object file when linking. */ | |
4770 | ||
4771 | static bfd_boolean | |
4772 | elf64_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd) | |
4773 | { | |
4774 | flagword out_flags; | |
4775 | flagword in_flags; | |
4776 | bfd_boolean flags_compatible = TRUE; | |
4777 | asection *sec; | |
4778 | ||
4779 | /* Check if we have the same endianess. */ | |
4780 | if (!_bfd_generic_verify_endian_match (ibfd, obfd)) | |
4781 | return FALSE; | |
4782 | ||
4783 | if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd)) | |
4784 | return TRUE; | |
4785 | ||
4786 | /* The input BFD must have had its flags initialised. */ | |
4787 | /* The following seems bogus to me -- The flags are initialized in | |
4788 | the assembler but I don't think an elf_flags_init field is | |
4789 | written into the object. */ | |
4790 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ | |
4791 | ||
4792 | in_flags = elf_elfheader (ibfd)->e_flags; | |
4793 | out_flags = elf_elfheader (obfd)->e_flags; | |
4794 | ||
4795 | if (!elf_flags_init (obfd)) | |
4796 | { | |
4797 | /* If the input is the default architecture and had the default | |
4798 | flags then do not bother setting the flags for the output | |
4799 | architecture, instead allow future merges to do this. If no | |
4800 | future merges ever set these flags then they will retain their | |
4801 | uninitialised values, which surprise surprise, correspond | |
4802 | to the default values. */ | |
4803 | if (bfd_get_arch_info (ibfd)->the_default | |
4804 | && elf_elfheader (ibfd)->e_flags == 0) | |
4805 | return TRUE; | |
4806 | ||
4807 | elf_flags_init (obfd) = TRUE; | |
4808 | elf_elfheader (obfd)->e_flags = in_flags; | |
4809 | ||
4810 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
4811 | && bfd_get_arch_info (obfd)->the_default) | |
4812 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
4813 | bfd_get_mach (ibfd)); | |
4814 | ||
4815 | return TRUE; | |
4816 | } | |
4817 | ||
4818 | /* Identical flags must be compatible. */ | |
4819 | if (in_flags == out_flags) | |
4820 | return TRUE; | |
4821 | ||
4822 | /* Check to see if the input BFD actually contains any sections. If | |
4823 | not, its flags may not have been initialised either, but it | |
4824 | cannot actually cause any incompatiblity. Do not short-circuit | |
4825 | dynamic objects; their section list may be emptied by | |
4826 | elf_link_add_object_symbols. | |
4827 | ||
4828 | Also check to see if there are no code sections in the input. | |
4829 | In this case there is no need to check for code specific flags. | |
4830 | XXX - do we need to worry about floating-point format compatability | |
4831 | in data sections ? */ | |
4832 | if (!(ibfd->flags & DYNAMIC)) | |
4833 | { | |
4834 | bfd_boolean null_input_bfd = TRUE; | |
4835 | bfd_boolean only_data_sections = TRUE; | |
4836 | ||
4837 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
4838 | { | |
4839 | if ((bfd_get_section_flags (ibfd, sec) | |
4840 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
4841 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
4842 | only_data_sections = FALSE; | |
4843 | ||
4844 | null_input_bfd = FALSE; | |
4845 | break; | |
4846 | } | |
4847 | ||
4848 | if (null_input_bfd || only_data_sections) | |
4849 | return TRUE; | |
4850 | } | |
4851 | ||
4852 | return flags_compatible; | |
4853 | } | |
4854 | ||
4855 | /* Display the flags field. */ | |
4856 | ||
4857 | static bfd_boolean | |
4858 | elf64_aarch64_print_private_bfd_data (bfd *abfd, void *ptr) | |
4859 | { | |
4860 | FILE *file = (FILE *) ptr; | |
4861 | unsigned long flags; | |
4862 | ||
4863 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
4864 | ||
4865 | /* Print normal ELF private data. */ | |
4866 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
4867 | ||
4868 | flags = elf_elfheader (abfd)->e_flags; | |
4869 | /* Ignore init flag - it may not be set, despite the flags field | |
4870 | containing valid data. */ | |
4871 | ||
4872 | /* xgettext:c-format */ | |
4873 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
4874 | ||
4875 | if (flags) | |
4876 | fprintf (file, _("<Unrecognised flag bits set>")); | |
4877 | ||
4878 | fputc ('\n', file); | |
4879 | ||
4880 | return TRUE; | |
4881 | } | |
4882 | ||
4883 | /* Update the got entry reference counts for the section being removed. */ | |
4884 | ||
4885 | static bfd_boolean | |
4886 | elf64_aarch64_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, | |
4887 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
4888 | asection *sec ATTRIBUTE_UNUSED, | |
4889 | const Elf_Internal_Rela * | |
4890 | relocs ATTRIBUTE_UNUSED) | |
4891 | { | |
4892 | return TRUE; | |
4893 | } | |
4894 | ||
4895 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
4896 | regular object. The current definition is in some section of the | |
4897 | dynamic object, but we're not including those sections. We have to | |
4898 | change the definition to something the rest of the link can | |
4899 | understand. */ | |
4900 | ||
4901 | static bfd_boolean | |
4902 | elf64_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info, | |
4903 | struct elf_link_hash_entry *h) | |
4904 | { | |
4905 | struct elf64_aarch64_link_hash_table *htab; | |
4906 | asection *s; | |
4907 | ||
4908 | /* If this is a function, put it in the procedure linkage table. We | |
4909 | will fill in the contents of the procedure linkage table later, | |
4910 | when we know the address of the .got section. */ | |
4911 | if (h->type == STT_FUNC || h->needs_plt) | |
4912 | { | |
4913 | if (h->plt.refcount <= 0 | |
4914 | || SYMBOL_CALLS_LOCAL (info, h) | |
4915 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
4916 | && h->root.type == bfd_link_hash_undefweak)) | |
4917 | { | |
4918 | /* This case can occur if we saw a CALL26 reloc in | |
4919 | an input file, but the symbol wasn't referred to | |
4920 | by a dynamic object or all references were | |
4921 | garbage collected. In which case we can end up | |
4922 | resolving. */ | |
4923 | h->plt.offset = (bfd_vma) - 1; | |
4924 | h->needs_plt = 0; | |
4925 | } | |
4926 | ||
4927 | return TRUE; | |
4928 | } | |
4929 | else | |
4930 | /* It's possible that we incorrectly decided a .plt reloc was | |
4931 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
4932 | check_relocs. We can't decide accurately between function and | |
4933 | non-function syms in check-relocs; Objects loaded later in | |
4934 | the link may change h->type. So fix it now. */ | |
4935 | h->plt.offset = (bfd_vma) - 1; | |
4936 | ||
4937 | ||
4938 | /* If this is a weak symbol, and there is a real definition, the | |
4939 | processor independent code will have arranged for us to see the | |
4940 | real definition first, and we can just use the same value. */ | |
4941 | if (h->u.weakdef != NULL) | |
4942 | { | |
4943 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined | |
4944 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
4945 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
4946 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
4947 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) | |
4948 | h->non_got_ref = h->u.weakdef->non_got_ref; | |
4949 | return TRUE; | |
4950 | } | |
4951 | ||
4952 | /* If we are creating a shared library, we must presume that the | |
4953 | only references to the symbol are via the global offset table. | |
4954 | For such cases we need not do anything here; the relocations will | |
4955 | be handled correctly by relocate_section. */ | |
4956 | if (info->shared) | |
4957 | return TRUE; | |
4958 | ||
4959 | /* If there are no references to this symbol that do not use the | |
4960 | GOT, we don't need to generate a copy reloc. */ | |
4961 | if (!h->non_got_ref) | |
4962 | return TRUE; | |
4963 | ||
4964 | /* If -z nocopyreloc was given, we won't generate them either. */ | |
4965 | if (info->nocopyreloc) | |
4966 | { | |
4967 | h->non_got_ref = 0; | |
4968 | return TRUE; | |
4969 | } | |
4970 | ||
4971 | /* We must allocate the symbol in our .dynbss section, which will | |
4972 | become part of the .bss section of the executable. There will be | |
4973 | an entry for this symbol in the .dynsym section. The dynamic | |
4974 | object will contain position independent code, so all references | |
4975 | from the dynamic object to this symbol will go through the global | |
4976 | offset table. The dynamic linker will use the .dynsym entry to | |
4977 | determine the address it must put in the global offset table, so | |
4978 | both the dynamic object and the regular object will refer to the | |
4979 | same memory location for the variable. */ | |
4980 | ||
4981 | htab = elf64_aarch64_hash_table (info); | |
4982 | ||
4983 | /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker | |
4984 | to copy the initial value out of the dynamic object and into the | |
4985 | runtime process image. */ | |
4986 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) | |
4987 | { | |
4988 | htab->srelbss->size += RELOC_SIZE (htab); | |
4989 | h->needs_copy = 1; | |
4990 | } | |
4991 | ||
4992 | s = htab->sdynbss; | |
4993 | ||
4994 | return _bfd_elf_adjust_dynamic_copy (h, s); | |
4995 | ||
4996 | } | |
4997 | ||
4998 | static bfd_boolean | |
4999 | elf64_aarch64_allocate_local_symbols (bfd *abfd, unsigned number) | |
5000 | { | |
5001 | struct elf_aarch64_local_symbol *locals; | |
5002 | locals = elf64_aarch64_locals (abfd); | |
5003 | if (locals == NULL) | |
5004 | { | |
5005 | locals = (struct elf_aarch64_local_symbol *) | |
5006 | bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol)); | |
5007 | if (locals == NULL) | |
5008 | return FALSE; | |
5009 | elf64_aarch64_locals (abfd) = locals; | |
5010 | } | |
5011 | return TRUE; | |
5012 | } | |
5013 | ||
5014 | /* Look through the relocs for a section during the first phase. */ | |
5015 | ||
5016 | static bfd_boolean | |
5017 | elf64_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info, | |
5018 | asection *sec, const Elf_Internal_Rela *relocs) | |
5019 | { | |
5020 | Elf_Internal_Shdr *symtab_hdr; | |
5021 | struct elf_link_hash_entry **sym_hashes; | |
5022 | const Elf_Internal_Rela *rel; | |
5023 | const Elf_Internal_Rela *rel_end; | |
5024 | asection *sreloc; | |
5025 | ||
5026 | struct elf64_aarch64_link_hash_table *htab; | |
5027 | ||
5028 | unsigned long nsyms; | |
5029 | ||
5030 | if (info->relocatable) | |
5031 | return TRUE; | |
5032 | ||
5033 | BFD_ASSERT (is_aarch64_elf (abfd)); | |
5034 | ||
5035 | htab = elf64_aarch64_hash_table (info); | |
5036 | sreloc = NULL; | |
5037 | ||
5038 | symtab_hdr = &elf_symtab_hdr (abfd); | |
5039 | sym_hashes = elf_sym_hashes (abfd); | |
5040 | nsyms = NUM_SHDR_ENTRIES (symtab_hdr); | |
5041 | ||
5042 | rel_end = relocs + sec->reloc_count; | |
5043 | for (rel = relocs; rel < rel_end; rel++) | |
5044 | { | |
5045 | struct elf_link_hash_entry *h; | |
5046 | unsigned long r_symndx; | |
5047 | unsigned int r_type; | |
5048 | ||
5049 | r_symndx = ELF64_R_SYM (rel->r_info); | |
5050 | r_type = ELF64_R_TYPE (rel->r_info); | |
5051 | ||
5052 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
5053 | { | |
5054 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd, | |
5055 | r_symndx); | |
5056 | return FALSE; | |
5057 | } | |
5058 | ||
5059 | if (r_symndx >= nsyms | |
5060 | /* PR 9934: It is possible to have relocations that do not | |
5061 | refer to symbols, thus it is also possible to have an | |
5062 | object file containing relocations but no symbol table. */ | |
5063 | && (r_symndx > 0 || nsyms > 0)) | |
5064 | { | |
5065 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd, | |
5066 | r_symndx); | |
5067 | return FALSE; | |
5068 | } | |
5069 | ||
5070 | if (nsyms == 0 || r_symndx < symtab_hdr->sh_info) | |
5071 | h = NULL; | |
5072 | else | |
5073 | { | |
5074 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
5075 | while (h->root.type == bfd_link_hash_indirect | |
5076 | || h->root.type == bfd_link_hash_warning) | |
5077 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5078 | } | |
5079 | ||
5080 | /* Could be done earlier, if h were already available. */ | |
5081 | r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx); | |
5082 | ||
5083 | switch (r_type) | |
5084 | { | |
5085 | case R_AARCH64_ABS64: | |
5086 | ||
5087 | /* We don't need to handle relocs into sections not going into | |
5088 | the "real" output. */ | |
5089 | if ((sec->flags & SEC_ALLOC) == 0) | |
5090 | break; | |
5091 | ||
5092 | if (h != NULL) | |
5093 | { | |
5094 | if (!info->shared) | |
5095 | h->non_got_ref = 1; | |
5096 | ||
5097 | h->plt.refcount += 1; | |
5098 | h->pointer_equality_needed = 1; | |
5099 | } | |
5100 | ||
5101 | /* No need to do anything if we're not creating a shared | |
5102 | object. */ | |
5103 | if (! info->shared) | |
5104 | break; | |
5105 | ||
5106 | { | |
5107 | struct elf_dyn_relocs *p; | |
5108 | struct elf_dyn_relocs **head; | |
5109 | ||
5110 | /* We must copy these reloc types into the output file. | |
5111 | Create a reloc section in dynobj and make room for | |
5112 | this reloc. */ | |
5113 | if (sreloc == NULL) | |
5114 | { | |
5115 | if (htab->root.dynobj == NULL) | |
5116 | htab->root.dynobj = abfd; | |
5117 | ||
5118 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
5119 | (sec, htab->root.dynobj, 3, abfd, /*rela? */ TRUE); | |
5120 | ||
5121 | if (sreloc == NULL) | |
5122 | return FALSE; | |
5123 | } | |
5124 | ||
5125 | /* If this is a global symbol, we count the number of | |
5126 | relocations we need for this symbol. */ | |
5127 | if (h != NULL) | |
5128 | { | |
5129 | struct elf64_aarch64_link_hash_entry *eh; | |
5130 | eh = (struct elf64_aarch64_link_hash_entry *) h; | |
5131 | head = &eh->dyn_relocs; | |
5132 | } | |
5133 | else | |
5134 | { | |
5135 | /* Track dynamic relocs needed for local syms too. | |
5136 | We really need local syms available to do this | |
5137 | easily. Oh well. */ | |
5138 | ||
5139 | asection *s; | |
5140 | void **vpp; | |
5141 | Elf_Internal_Sym *isym; | |
5142 | ||
5143 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
5144 | abfd, r_symndx); | |
5145 | if (isym == NULL) | |
5146 | return FALSE; | |
5147 | ||
5148 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
5149 | if (s == NULL) | |
5150 | s = sec; | |
5151 | ||
5152 | /* Beware of type punned pointers vs strict aliasing | |
5153 | rules. */ | |
5154 | vpp = &(elf_section_data (s)->local_dynrel); | |
5155 | head = (struct elf_dyn_relocs **) vpp; | |
5156 | } | |
5157 | ||
5158 | p = *head; | |
5159 | if (p == NULL || p->sec != sec) | |
5160 | { | |
5161 | bfd_size_type amt = sizeof *p; | |
5162 | p = ((struct elf_dyn_relocs *) | |
5163 | bfd_zalloc (htab->root.dynobj, amt)); | |
5164 | if (p == NULL) | |
5165 | return FALSE; | |
5166 | p->next = *head; | |
5167 | *head = p; | |
5168 | p->sec = sec; | |
5169 | } | |
5170 | ||
5171 | p->count += 1; | |
5172 | ||
5173 | } | |
5174 | break; | |
5175 | ||
5176 | /* RR: We probably want to keep a consistency check that | |
5177 | there are no dangling GOT_PAGE relocs. */ | |
5178 | case R_AARCH64_LD64_GOT_LO12_NC: | |
f41aef5f | 5179 | case R_AARCH64_GOT_LD_PREL19: |
a06ea964 NC |
5180 | case R_AARCH64_ADR_GOT_PAGE: |
5181 | case R_AARCH64_TLSGD_ADR_PAGE21: | |
5182 | case R_AARCH64_TLSGD_ADD_LO12_NC: | |
5183 | case R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
5184 | case R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
5185 | case R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
5186 | case R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
5187 | case R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
5188 | case R_AARCH64_TLSLE_MOVW_TPREL_G2: | |
5189 | case R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
5190 | case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
5191 | case R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
5192 | case R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
5193 | case R_AARCH64_TLSDESC_ADR_PAGE: | |
5194 | case R_AARCH64_TLSDESC_ADD_LO12_NC: | |
5195 | case R_AARCH64_TLSDESC_LD64_LO12_NC: | |
5196 | { | |
5197 | unsigned got_type; | |
5198 | unsigned old_got_type; | |
5199 | ||
5200 | got_type = aarch64_reloc_got_type (r_type); | |
5201 | ||
5202 | if (h) | |
5203 | { | |
5204 | h->got.refcount += 1; | |
5205 | old_got_type = elf64_aarch64_hash_entry (h)->got_type; | |
5206 | } | |
5207 | else | |
5208 | { | |
5209 | struct elf_aarch64_local_symbol *locals; | |
5210 | ||
5211 | if (!elf64_aarch64_allocate_local_symbols | |
5212 | (abfd, symtab_hdr->sh_info)) | |
5213 | return FALSE; | |
5214 | ||
5215 | locals = elf64_aarch64_locals (abfd); | |
5216 | BFD_ASSERT (r_symndx < symtab_hdr->sh_info); | |
5217 | locals[r_symndx].got_refcount += 1; | |
5218 | old_got_type = locals[r_symndx].got_type; | |
5219 | } | |
5220 | ||
5221 | /* If a variable is accessed with both general dynamic TLS | |
5222 | methods, two slots may be created. */ | |
5223 | if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type)) | |
5224 | got_type |= old_got_type; | |
5225 | ||
5226 | /* We will already have issued an error message if there | |
5227 | is a TLS/non-TLS mismatch, based on the symbol type. | |
5228 | So just combine any TLS types needed. */ | |
5229 | if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL | |
5230 | && got_type != GOT_NORMAL) | |
5231 | got_type |= old_got_type; | |
5232 | ||
5233 | /* If the symbol is accessed by both IE and GD methods, we | |
5234 | are able to relax. Turn off the GD flag, without | |
5235 | messing up with any other kind of TLS types that may be | |
5236 | involved. */ | |
5237 | if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type)) | |
5238 | got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD); | |
5239 | ||
5240 | if (old_got_type != got_type) | |
5241 | { | |
5242 | if (h != NULL) | |
5243 | elf64_aarch64_hash_entry (h)->got_type = got_type; | |
5244 | else | |
5245 | { | |
5246 | struct elf_aarch64_local_symbol *locals; | |
5247 | locals = elf64_aarch64_locals (abfd); | |
5248 | BFD_ASSERT (r_symndx < symtab_hdr->sh_info); | |
5249 | locals[r_symndx].got_type = got_type; | |
5250 | } | |
5251 | } | |
5252 | ||
5253 | if (htab->root.sgot == NULL) | |
5254 | { | |
5255 | if (htab->root.dynobj == NULL) | |
5256 | htab->root.dynobj = abfd; | |
5257 | if (!_bfd_elf_create_got_section (htab->root.dynobj, info)) | |
5258 | return FALSE; | |
5259 | } | |
5260 | break; | |
5261 | } | |
5262 | ||
5263 | case R_AARCH64_ADR_PREL_PG_HI21_NC: | |
5264 | case R_AARCH64_ADR_PREL_PG_HI21: | |
f41aef5f | 5265 | case R_AARCH64_ADR_PREL_LO21: |
a06ea964 NC |
5266 | if (h != NULL && info->executable) |
5267 | { | |
5268 | /* If this reloc is in a read-only section, we might | |
5269 | need a copy reloc. We can't check reliably at this | |
5270 | stage whether the section is read-only, as input | |
5271 | sections have not yet been mapped to output sections. | |
5272 | Tentatively set the flag for now, and correct in | |
5273 | adjust_dynamic_symbol. */ | |
5274 | h->non_got_ref = 1; | |
5275 | h->plt.refcount += 1; | |
5276 | h->pointer_equality_needed = 1; | |
5277 | } | |
5278 | /* FIXME:: RR need to handle these in shared libraries | |
5279 | and essentially bomb out as these being non-PIC | |
5280 | relocations in shared libraries. */ | |
5281 | break; | |
5282 | ||
5283 | case R_AARCH64_CALL26: | |
5284 | case R_AARCH64_JUMP26: | |
5285 | /* If this is a local symbol then we resolve it | |
5286 | directly without creating a PLT entry. */ | |
5287 | if (h == NULL) | |
5288 | continue; | |
5289 | ||
5290 | h->needs_plt = 1; | |
5291 | h->plt.refcount += 1; | |
5292 | break; | |
5293 | } | |
5294 | } | |
5295 | return TRUE; | |
5296 | } | |
5297 | ||
5298 | /* Treat mapping symbols as special target symbols. */ | |
5299 | ||
5300 | static bfd_boolean | |
5301 | elf64_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED, | |
5302 | asymbol *sym) | |
5303 | { | |
5304 | return bfd_is_aarch64_special_symbol_name (sym->name, | |
5305 | BFD_AARCH64_SPECIAL_SYM_TYPE_ANY); | |
5306 | } | |
5307 | ||
5308 | /* This is a copy of elf_find_function () from elf.c except that | |
5309 | AArch64 mapping symbols are ignored when looking for function names. */ | |
5310 | ||
5311 | static bfd_boolean | |
5312 | aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED, | |
5313 | asection *section, | |
5314 | asymbol **symbols, | |
5315 | bfd_vma offset, | |
5316 | const char **filename_ptr, | |
5317 | const char **functionname_ptr) | |
5318 | { | |
5319 | const char *filename = NULL; | |
5320 | asymbol *func = NULL; | |
5321 | bfd_vma low_func = 0; | |
5322 | asymbol **p; | |
5323 | ||
5324 | for (p = symbols; *p != NULL; p++) | |
5325 | { | |
5326 | elf_symbol_type *q; | |
5327 | ||
5328 | q = (elf_symbol_type *) * p; | |
5329 | ||
5330 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) | |
5331 | { | |
5332 | default: | |
5333 | break; | |
5334 | case STT_FILE: | |
5335 | filename = bfd_asymbol_name (&q->symbol); | |
5336 | break; | |
5337 | case STT_FUNC: | |
5338 | case STT_NOTYPE: | |
5339 | /* Skip mapping symbols. */ | |
5340 | if ((q->symbol.flags & BSF_LOCAL) | |
5341 | && (bfd_is_aarch64_special_symbol_name | |
5342 | (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY))) | |
5343 | continue; | |
5344 | /* Fall through. */ | |
5345 | if (bfd_get_section (&q->symbol) == section | |
5346 | && q->symbol.value >= low_func && q->symbol.value <= offset) | |
5347 | { | |
5348 | func = (asymbol *) q; | |
5349 | low_func = q->symbol.value; | |
5350 | } | |
5351 | break; | |
5352 | } | |
5353 | } | |
5354 | ||
5355 | if (func == NULL) | |
5356 | return FALSE; | |
5357 | ||
5358 | if (filename_ptr) | |
5359 | *filename_ptr = filename; | |
5360 | if (functionname_ptr) | |
5361 | *functionname_ptr = bfd_asymbol_name (func); | |
5362 | ||
5363 | return TRUE; | |
5364 | } | |
5365 | ||
5366 | ||
5367 | /* Find the nearest line to a particular section and offset, for error | |
5368 | reporting. This code is a duplicate of the code in elf.c, except | |
5369 | that it uses aarch64_elf_find_function. */ | |
5370 | ||
5371 | static bfd_boolean | |
5372 | elf64_aarch64_find_nearest_line (bfd *abfd, | |
5373 | asection *section, | |
5374 | asymbol **symbols, | |
5375 | bfd_vma offset, | |
5376 | const char **filename_ptr, | |
5377 | const char **functionname_ptr, | |
5378 | unsigned int *line_ptr) | |
5379 | { | |
5380 | bfd_boolean found = FALSE; | |
5381 | ||
5382 | /* We skip _bfd_dwarf1_find_nearest_line since no known AArch64 | |
5383 | toolchain uses it. */ | |
5384 | ||
5385 | if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections, | |
5386 | section, symbols, offset, | |
5387 | filename_ptr, functionname_ptr, | |
5388 | line_ptr, NULL, 0, | |
5389 | &elf_tdata (abfd)->dwarf2_find_line_info)) | |
5390 | { | |
5391 | if (!*functionname_ptr) | |
5392 | aarch64_elf_find_function (abfd, section, symbols, offset, | |
5393 | *filename_ptr ? NULL : filename_ptr, | |
5394 | functionname_ptr); | |
5395 | ||
5396 | return TRUE; | |
5397 | } | |
5398 | ||
5399 | if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, | |
5400 | &found, filename_ptr, | |
5401 | functionname_ptr, line_ptr, | |
5402 | &elf_tdata (abfd)->line_info)) | |
5403 | return FALSE; | |
5404 | ||
5405 | if (found && (*functionname_ptr || *line_ptr)) | |
5406 | return TRUE; | |
5407 | ||
5408 | if (symbols == NULL) | |
5409 | return FALSE; | |
5410 | ||
5411 | if (!aarch64_elf_find_function (abfd, section, symbols, offset, | |
5412 | filename_ptr, functionname_ptr)) | |
5413 | return FALSE; | |
5414 | ||
5415 | *line_ptr = 0; | |
5416 | return TRUE; | |
5417 | } | |
5418 | ||
5419 | static bfd_boolean | |
5420 | elf64_aarch64_find_inliner_info (bfd *abfd, | |
5421 | const char **filename_ptr, | |
5422 | const char **functionname_ptr, | |
5423 | unsigned int *line_ptr) | |
5424 | { | |
5425 | bfd_boolean found; | |
5426 | found = _bfd_dwarf2_find_inliner_info | |
5427 | (abfd, filename_ptr, | |
5428 | functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info); | |
5429 | return found; | |
5430 | } | |
5431 | ||
5432 | ||
5433 | static void | |
5434 | elf64_aarch64_post_process_headers (bfd *abfd, | |
5435 | struct bfd_link_info *link_info | |
5436 | ATTRIBUTE_UNUSED) | |
5437 | { | |
5438 | Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */ | |
5439 | ||
5440 | i_ehdrp = elf_elfheader (abfd); | |
5441 | i_ehdrp->e_ident[EI_OSABI] = 0; | |
5442 | i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION; | |
5443 | } | |
5444 | ||
5445 | static enum elf_reloc_type_class | |
5446 | elf64_aarch64_reloc_type_class (const Elf_Internal_Rela *rela) | |
5447 | { | |
5448 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
5449 | { | |
5450 | case R_AARCH64_RELATIVE: | |
5451 | return reloc_class_relative; | |
5452 | case R_AARCH64_JUMP_SLOT: | |
5453 | return reloc_class_plt; | |
5454 | case R_AARCH64_COPY: | |
5455 | return reloc_class_copy; | |
5456 | default: | |
5457 | return reloc_class_normal; | |
5458 | } | |
5459 | } | |
5460 | ||
5461 | /* Set the right machine number for an AArch64 ELF file. */ | |
5462 | ||
5463 | static bfd_boolean | |
5464 | elf64_aarch64_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) | |
5465 | { | |
5466 | if (hdr->sh_type == SHT_NOTE) | |
5467 | *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS; | |
5468 | ||
5469 | return TRUE; | |
5470 | } | |
5471 | ||
5472 | /* Handle an AArch64 specific section when reading an object file. This is | |
5473 | called when bfd_section_from_shdr finds a section with an unknown | |
5474 | type. */ | |
5475 | ||
5476 | static bfd_boolean | |
5477 | elf64_aarch64_section_from_shdr (bfd *abfd, | |
5478 | Elf_Internal_Shdr *hdr, | |
5479 | const char *name, int shindex) | |
5480 | { | |
5481 | /* There ought to be a place to keep ELF backend specific flags, but | |
5482 | at the moment there isn't one. We just keep track of the | |
5483 | sections by their name, instead. Fortunately, the ABI gives | |
5484 | names for all the AArch64 specific sections, so we will probably get | |
5485 | away with this. */ | |
5486 | switch (hdr->sh_type) | |
5487 | { | |
5488 | case SHT_AARCH64_ATTRIBUTES: | |
5489 | break; | |
5490 | ||
5491 | default: | |
5492 | return FALSE; | |
5493 | } | |
5494 | ||
5495 | if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) | |
5496 | return FALSE; | |
5497 | ||
5498 | return TRUE; | |
5499 | } | |
5500 | ||
5501 | /* A structure used to record a list of sections, independently | |
5502 | of the next and prev fields in the asection structure. */ | |
5503 | typedef struct section_list | |
5504 | { | |
5505 | asection *sec; | |
5506 | struct section_list *next; | |
5507 | struct section_list *prev; | |
5508 | } | |
5509 | section_list; | |
5510 | ||
5511 | /* Unfortunately we need to keep a list of sections for which | |
5512 | an _aarch64_elf_section_data structure has been allocated. This | |
5513 | is because it is possible for functions like elf64_aarch64_write_section | |
5514 | to be called on a section which has had an elf_data_structure | |
5515 | allocated for it (and so the used_by_bfd field is valid) but | |
5516 | for which the AArch64 extended version of this structure - the | |
5517 | _aarch64_elf_section_data structure - has not been allocated. */ | |
5518 | static section_list *sections_with_aarch64_elf_section_data = NULL; | |
5519 | ||
5520 | static void | |
5521 | record_section_with_aarch64_elf_section_data (asection *sec) | |
5522 | { | |
5523 | struct section_list *entry; | |
5524 | ||
5525 | entry = bfd_malloc (sizeof (*entry)); | |
5526 | if (entry == NULL) | |
5527 | return; | |
5528 | entry->sec = sec; | |
5529 | entry->next = sections_with_aarch64_elf_section_data; | |
5530 | entry->prev = NULL; | |
5531 | if (entry->next != NULL) | |
5532 | entry->next->prev = entry; | |
5533 | sections_with_aarch64_elf_section_data = entry; | |
5534 | } | |
5535 | ||
5536 | static struct section_list * | |
5537 | find_aarch64_elf_section_entry (asection *sec) | |
5538 | { | |
5539 | struct section_list *entry; | |
5540 | static struct section_list *last_entry = NULL; | |
5541 | ||
5542 | /* This is a short cut for the typical case where the sections are added | |
5543 | to the sections_with_aarch64_elf_section_data list in forward order and | |
5544 | then looked up here in backwards order. This makes a real difference | |
5545 | to the ld-srec/sec64k.exp linker test. */ | |
5546 | entry = sections_with_aarch64_elf_section_data; | |
5547 | if (last_entry != NULL) | |
5548 | { | |
5549 | if (last_entry->sec == sec) | |
5550 | entry = last_entry; | |
5551 | else if (last_entry->next != NULL && last_entry->next->sec == sec) | |
5552 | entry = last_entry->next; | |
5553 | } | |
5554 | ||
5555 | for (; entry; entry = entry->next) | |
5556 | if (entry->sec == sec) | |
5557 | break; | |
5558 | ||
5559 | if (entry) | |
5560 | /* Record the entry prior to this one - it is the entry we are | |
5561 | most likely to want to locate next time. Also this way if we | |
5562 | have been called from | |
5563 | unrecord_section_with_aarch64_elf_section_data () we will not | |
5564 | be caching a pointer that is about to be freed. */ | |
5565 | last_entry = entry->prev; | |
5566 | ||
5567 | return entry; | |
5568 | } | |
5569 | ||
5570 | static void | |
5571 | unrecord_section_with_aarch64_elf_section_data (asection *sec) | |
5572 | { | |
5573 | struct section_list *entry; | |
5574 | ||
5575 | entry = find_aarch64_elf_section_entry (sec); | |
5576 | ||
5577 | if (entry) | |
5578 | { | |
5579 | if (entry->prev != NULL) | |
5580 | entry->prev->next = entry->next; | |
5581 | if (entry->next != NULL) | |
5582 | entry->next->prev = entry->prev; | |
5583 | if (entry == sections_with_aarch64_elf_section_data) | |
5584 | sections_with_aarch64_elf_section_data = entry->next; | |
5585 | free (entry); | |
5586 | } | |
5587 | } | |
5588 | ||
5589 | ||
5590 | typedef struct | |
5591 | { | |
5592 | void *finfo; | |
5593 | struct bfd_link_info *info; | |
5594 | asection *sec; | |
5595 | int sec_shndx; | |
5596 | int (*func) (void *, const char *, Elf_Internal_Sym *, | |
5597 | asection *, struct elf_link_hash_entry *); | |
5598 | } output_arch_syminfo; | |
5599 | ||
5600 | enum map_symbol_type | |
5601 | { | |
5602 | AARCH64_MAP_INSN, | |
5603 | AARCH64_MAP_DATA | |
5604 | }; | |
5605 | ||
5606 | ||
5607 | /* Output a single mapping symbol. */ | |
5608 | ||
5609 | static bfd_boolean | |
5610 | elf64_aarch64_output_map_sym (output_arch_syminfo *osi, | |
5611 | enum map_symbol_type type, bfd_vma offset) | |
5612 | { | |
5613 | static const char *names[2] = { "$x", "$d" }; | |
5614 | Elf_Internal_Sym sym; | |
5615 | ||
5616 | sym.st_value = (osi->sec->output_section->vma | |
5617 | + osi->sec->output_offset + offset); | |
5618 | sym.st_size = 0; | |
5619 | sym.st_other = 0; | |
5620 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE); | |
5621 | sym.st_shndx = osi->sec_shndx; | |
5622 | return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1; | |
5623 | } | |
5624 | ||
5625 | ||
5626 | ||
5627 | /* Output mapping symbols for PLT entries associated with H. */ | |
5628 | ||
5629 | static bfd_boolean | |
5630 | elf64_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf) | |
5631 | { | |
5632 | output_arch_syminfo *osi = (output_arch_syminfo *) inf; | |
5633 | bfd_vma addr; | |
5634 | ||
5635 | if (h->root.type == bfd_link_hash_indirect) | |
5636 | return TRUE; | |
5637 | ||
5638 | if (h->root.type == bfd_link_hash_warning) | |
5639 | /* When warning symbols are created, they **replace** the "real" | |
5640 | entry in the hash table, thus we never get to see the real | |
5641 | symbol in a hash traversal. So look at it now. */ | |
5642 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5643 | ||
5644 | if (h->plt.offset == (bfd_vma) - 1) | |
5645 | return TRUE; | |
5646 | ||
5647 | addr = h->plt.offset; | |
5648 | if (addr == 32) | |
5649 | { | |
5650 | if (!elf64_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) | |
5651 | return FALSE; | |
5652 | } | |
5653 | return TRUE; | |
5654 | } | |
5655 | ||
5656 | ||
5657 | /* Output a single local symbol for a generated stub. */ | |
5658 | ||
5659 | static bfd_boolean | |
5660 | elf64_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name, | |
5661 | bfd_vma offset, bfd_vma size) | |
5662 | { | |
5663 | Elf_Internal_Sym sym; | |
5664 | ||
5665 | sym.st_value = (osi->sec->output_section->vma | |
5666 | + osi->sec->output_offset + offset); | |
5667 | sym.st_size = size; | |
5668 | sym.st_other = 0; | |
5669 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC); | |
5670 | sym.st_shndx = osi->sec_shndx; | |
5671 | return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1; | |
5672 | } | |
5673 | ||
5674 | static bfd_boolean | |
5675 | aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) | |
5676 | { | |
5677 | struct elf64_aarch64_stub_hash_entry *stub_entry; | |
5678 | asection *stub_sec; | |
5679 | bfd_vma addr; | |
5680 | char *stub_name; | |
5681 | output_arch_syminfo *osi; | |
5682 | ||
5683 | /* Massage our args to the form they really have. */ | |
5684 | stub_entry = (struct elf64_aarch64_stub_hash_entry *) gen_entry; | |
5685 | osi = (output_arch_syminfo *) in_arg; | |
5686 | ||
5687 | stub_sec = stub_entry->stub_sec; | |
5688 | ||
5689 | /* Ensure this stub is attached to the current section being | |
5690 | processed. */ | |
5691 | if (stub_sec != osi->sec) | |
5692 | return TRUE; | |
5693 | ||
5694 | addr = (bfd_vma) stub_entry->stub_offset; | |
5695 | ||
5696 | stub_name = stub_entry->output_name; | |
5697 | ||
5698 | switch (stub_entry->stub_type) | |
5699 | { | |
5700 | case aarch64_stub_adrp_branch: | |
5701 | if (!elf64_aarch64_output_stub_sym (osi, stub_name, addr, | |
5702 | sizeof (aarch64_adrp_branch_stub))) | |
5703 | return FALSE; | |
5704 | if (!elf64_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) | |
5705 | return FALSE; | |
5706 | break; | |
5707 | case aarch64_stub_long_branch: | |
5708 | if (!elf64_aarch64_output_stub_sym | |
5709 | (osi, stub_name, addr, sizeof (aarch64_long_branch_stub))) | |
5710 | return FALSE; | |
5711 | if (!elf64_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) | |
5712 | return FALSE; | |
5713 | if (!elf64_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16)) | |
5714 | return FALSE; | |
5715 | break; | |
5716 | default: | |
5717 | BFD_FAIL (); | |
5718 | } | |
5719 | ||
5720 | return TRUE; | |
5721 | } | |
5722 | ||
5723 | /* Output mapping symbols for linker generated sections. */ | |
5724 | ||
5725 | static bfd_boolean | |
5726 | elf64_aarch64_output_arch_local_syms (bfd *output_bfd, | |
5727 | struct bfd_link_info *info, | |
5728 | void *finfo, | |
5729 | int (*func) (void *, const char *, | |
5730 | Elf_Internal_Sym *, | |
5731 | asection *, | |
5732 | struct elf_link_hash_entry | |
5733 | *)) | |
5734 | { | |
5735 | output_arch_syminfo osi; | |
5736 | struct elf64_aarch64_link_hash_table *htab; | |
5737 | ||
5738 | htab = elf64_aarch64_hash_table (info); | |
5739 | ||
5740 | osi.finfo = finfo; | |
5741 | osi.info = info; | |
5742 | osi.func = func; | |
5743 | ||
5744 | /* Long calls stubs. */ | |
5745 | if (htab->stub_bfd && htab->stub_bfd->sections) | |
5746 | { | |
5747 | asection *stub_sec; | |
5748 | ||
5749 | for (stub_sec = htab->stub_bfd->sections; | |
5750 | stub_sec != NULL; stub_sec = stub_sec->next) | |
5751 | { | |
5752 | /* Ignore non-stub sections. */ | |
5753 | if (!strstr (stub_sec->name, STUB_SUFFIX)) | |
5754 | continue; | |
5755 | ||
5756 | osi.sec = stub_sec; | |
5757 | ||
5758 | osi.sec_shndx = _bfd_elf_section_from_bfd_section | |
5759 | (output_bfd, osi.sec->output_section); | |
5760 | ||
5761 | bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub, | |
5762 | &osi); | |
5763 | } | |
5764 | } | |
5765 | ||
5766 | /* Finally, output mapping symbols for the PLT. */ | |
5767 | if (!htab->root.splt || htab->root.splt->size == 0) | |
5768 | return TRUE; | |
5769 | ||
5770 | /* For now live without mapping symbols for the plt. */ | |
5771 | osi.sec_shndx = _bfd_elf_section_from_bfd_section | |
5772 | (output_bfd, htab->root.splt->output_section); | |
5773 | osi.sec = htab->root.splt; | |
5774 | ||
5775 | elf_link_hash_traverse (&htab->root, elf64_aarch64_output_plt_map, | |
5776 | (void *) &osi); | |
5777 | ||
5778 | return TRUE; | |
5779 | ||
5780 | } | |
5781 | ||
5782 | /* Allocate target specific section data. */ | |
5783 | ||
5784 | static bfd_boolean | |
5785 | elf64_aarch64_new_section_hook (bfd *abfd, asection *sec) | |
5786 | { | |
5787 | if (!sec->used_by_bfd) | |
5788 | { | |
5789 | _aarch64_elf_section_data *sdata; | |
5790 | bfd_size_type amt = sizeof (*sdata); | |
5791 | ||
5792 | sdata = bfd_zalloc (abfd, amt); | |
5793 | if (sdata == NULL) | |
5794 | return FALSE; | |
5795 | sec->used_by_bfd = sdata; | |
5796 | } | |
5797 | ||
5798 | record_section_with_aarch64_elf_section_data (sec); | |
5799 | ||
5800 | return _bfd_elf_new_section_hook (abfd, sec); | |
5801 | } | |
5802 | ||
5803 | ||
5804 | static void | |
5805 | unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED, | |
5806 | asection *sec, | |
5807 | void *ignore ATTRIBUTE_UNUSED) | |
5808 | { | |
5809 | unrecord_section_with_aarch64_elf_section_data (sec); | |
5810 | } | |
5811 | ||
5812 | static bfd_boolean | |
5813 | elf64_aarch64_close_and_cleanup (bfd *abfd) | |
5814 | { | |
5815 | if (abfd->sections) | |
5816 | bfd_map_over_sections (abfd, | |
5817 | unrecord_section_via_map_over_sections, NULL); | |
5818 | ||
5819 | return _bfd_elf_close_and_cleanup (abfd); | |
5820 | } | |
5821 | ||
5822 | static bfd_boolean | |
5823 | elf64_aarch64_bfd_free_cached_info (bfd *abfd) | |
5824 | { | |
5825 | if (abfd->sections) | |
5826 | bfd_map_over_sections (abfd, | |
5827 | unrecord_section_via_map_over_sections, NULL); | |
5828 | ||
5829 | return _bfd_free_cached_info (abfd); | |
5830 | } | |
5831 | ||
5832 | static bfd_boolean | |
5833 | elf64_aarch64_is_function_type (unsigned int type) | |
5834 | { | |
5835 | return type == STT_FUNC; | |
5836 | } | |
5837 | ||
5838 | /* Create dynamic sections. This is different from the ARM backend in that | |
5839 | the got, plt, gotplt and their relocation sections are all created in the | |
5840 | standard part of the bfd elf backend. */ | |
5841 | ||
5842 | static bfd_boolean | |
5843 | elf64_aarch64_create_dynamic_sections (bfd *dynobj, | |
5844 | struct bfd_link_info *info) | |
5845 | { | |
5846 | struct elf64_aarch64_link_hash_table *htab; | |
5847 | struct elf_link_hash_entry *h; | |
5848 | ||
5849 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
5850 | return FALSE; | |
5851 | ||
5852 | htab = elf64_aarch64_hash_table (info); | |
5853 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); | |
5854 | if (!info->shared) | |
5855 | htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); | |
5856 | ||
5857 | if (!htab->sdynbss || (!info->shared && !htab->srelbss)) | |
5858 | abort (); | |
5859 | ||
5860 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the | |
5861 | dynobj's .got section. We don't do this in the linker script | |
5862 | because we don't want to define the symbol if we are not creating | |
5863 | a global offset table. */ | |
5864 | h = _bfd_elf_define_linkage_sym (dynobj, info, | |
5865 | htab->root.sgot, "_GLOBAL_OFFSET_TABLE_"); | |
5866 | elf_hash_table (info)->hgot = h; | |
5867 | if (h == NULL) | |
5868 | return FALSE; | |
5869 | ||
5870 | return TRUE; | |
5871 | } | |
5872 | ||
5873 | ||
5874 | /* Allocate space in .plt, .got and associated reloc sections for | |
5875 | dynamic relocs. */ | |
5876 | ||
5877 | static bfd_boolean | |
5878 | elf64_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) | |
5879 | { | |
5880 | struct bfd_link_info *info; | |
5881 | struct elf64_aarch64_link_hash_table *htab; | |
5882 | struct elf64_aarch64_link_hash_entry *eh; | |
5883 | struct elf_dyn_relocs *p; | |
5884 | ||
5885 | /* An example of a bfd_link_hash_indirect symbol is versioned | |
5886 | symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) | |
5887 | -> __gxx_personality_v0(bfd_link_hash_defined) | |
5888 | ||
5889 | There is no need to process bfd_link_hash_indirect symbols here | |
5890 | because we will also be presented with the concrete instance of | |
5891 | the symbol and elf64_aarch64_copy_indirect_symbol () will have been | |
5892 | called to copy all relevant data from the generic to the concrete | |
5893 | symbol instance. | |
5894 | */ | |
5895 | if (h->root.type == bfd_link_hash_indirect) | |
5896 | return TRUE; | |
5897 | ||
5898 | if (h->root.type == bfd_link_hash_warning) | |
5899 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5900 | ||
5901 | info = (struct bfd_link_info *) inf; | |
5902 | htab = elf64_aarch64_hash_table (info); | |
5903 | ||
5904 | if (htab->root.dynamic_sections_created && h->plt.refcount > 0) | |
5905 | { | |
5906 | /* Make sure this symbol is output as a dynamic symbol. | |
5907 | Undefined weak syms won't yet be marked as dynamic. */ | |
5908 | if (h->dynindx == -1 && !h->forced_local) | |
5909 | { | |
5910 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) | |
5911 | return FALSE; | |
5912 | } | |
5913 | ||
5914 | if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
5915 | { | |
5916 | asection *s = htab->root.splt; | |
5917 | ||
5918 | /* If this is the first .plt entry, make room for the special | |
5919 | first entry. */ | |
5920 | if (s->size == 0) | |
5921 | s->size += htab->plt_header_size; | |
5922 | ||
5923 | h->plt.offset = s->size; | |
5924 | ||
5925 | /* If this symbol is not defined in a regular file, and we are | |
5926 | not generating a shared library, then set the symbol to this | |
5927 | location in the .plt. This is required to make function | |
5928 | pointers compare as equal between the normal executable and | |
5929 | the shared library. */ | |
5930 | if (!info->shared && !h->def_regular) | |
5931 | { | |
5932 | h->root.u.def.section = s; | |
5933 | h->root.u.def.value = h->plt.offset; | |
5934 | } | |
5935 | ||
5936 | /* Make room for this entry. For now we only create the | |
5937 | small model PLT entries. We later need to find a way | |
5938 | of relaxing into these from the large model PLT entries. */ | |
5939 | s->size += PLT_SMALL_ENTRY_SIZE; | |
5940 | ||
5941 | /* We also need to make an entry in the .got.plt section, which | |
5942 | will be placed in the .got section by the linker script. */ | |
5943 | htab->root.sgotplt->size += GOT_ENTRY_SIZE; | |
5944 | ||
5945 | /* We also need to make an entry in the .rela.plt section. */ | |
5946 | htab->root.srelplt->size += RELOC_SIZE (htab); | |
5947 | ||
5948 | /* We need to ensure that all GOT entries that serve the PLT | |
5949 | are consecutive with the special GOT slots [0] [1] and | |
5950 | [2]. Any addtional relocations, such as | |
5951 | R_AARCH64_TLSDESC, must be placed after the PLT related | |
5952 | entries. We abuse the reloc_count such that during | |
5953 | sizing we adjust reloc_count to indicate the number of | |
5954 | PLT related reserved entries. In subsequent phases when | |
5955 | filling in the contents of the reloc entries, PLT related | |
5956 | entries are placed by computing their PLT index (0 | |
5957 | .. reloc_count). While other none PLT relocs are placed | |
5958 | at the slot indicated by reloc_count and reloc_count is | |
5959 | updated. */ | |
5960 | ||
5961 | htab->root.srelplt->reloc_count++; | |
5962 | } | |
5963 | else | |
5964 | { | |
5965 | h->plt.offset = (bfd_vma) - 1; | |
5966 | h->needs_plt = 0; | |
5967 | } | |
5968 | } | |
5969 | else | |
5970 | { | |
5971 | h->plt.offset = (bfd_vma) - 1; | |
5972 | h->needs_plt = 0; | |
5973 | } | |
5974 | ||
5975 | eh = (struct elf64_aarch64_link_hash_entry *) h; | |
5976 | eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; | |
5977 | ||
5978 | if (h->got.refcount > 0) | |
5979 | { | |
5980 | bfd_boolean dyn; | |
5981 | unsigned got_type = elf64_aarch64_hash_entry (h)->got_type; | |
5982 | ||
5983 | h->got.offset = (bfd_vma) - 1; | |
5984 | ||
5985 | dyn = htab->root.dynamic_sections_created; | |
5986 | ||
5987 | /* Make sure this symbol is output as a dynamic symbol. | |
5988 | Undefined weak syms won't yet be marked as dynamic. */ | |
5989 | if (dyn && h->dynindx == -1 && !h->forced_local) | |
5990 | { | |
5991 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) | |
5992 | return FALSE; | |
5993 | } | |
5994 | ||
5995 | if (got_type == GOT_UNKNOWN) | |
5996 | { | |
5997 | } | |
5998 | else if (got_type == GOT_NORMAL) | |
5999 | { | |
6000 | h->got.offset = htab->root.sgot->size; | |
6001 | htab->root.sgot->size += GOT_ENTRY_SIZE; | |
6002 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
6003 | || h->root.type != bfd_link_hash_undefweak) | |
6004 | && (info->shared | |
6005 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
6006 | { | |
6007 | htab->root.srelgot->size += RELOC_SIZE (htab); | |
6008 | } | |
6009 | } | |
6010 | else | |
6011 | { | |
6012 | int indx; | |
6013 | if (got_type & GOT_TLSDESC_GD) | |
6014 | { | |
6015 | eh->tlsdesc_got_jump_table_offset = | |
6016 | (htab->root.sgotplt->size | |
6017 | - aarch64_compute_jump_table_size (htab)); | |
6018 | htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2; | |
6019 | h->got.offset = (bfd_vma) - 2; | |
6020 | } | |
6021 | ||
6022 | if (got_type & GOT_TLS_GD) | |
6023 | { | |
6024 | h->got.offset = htab->root.sgot->size; | |
6025 | htab->root.sgot->size += GOT_ENTRY_SIZE * 2; | |
6026 | } | |
6027 | ||
6028 | if (got_type & GOT_TLS_IE) | |
6029 | { | |
6030 | h->got.offset = htab->root.sgot->size; | |
6031 | htab->root.sgot->size += GOT_ENTRY_SIZE; | |
6032 | } | |
6033 | ||
6034 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
6035 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
6036 | || h->root.type != bfd_link_hash_undefweak) | |
6037 | && (info->shared | |
6038 | || indx != 0 | |
6039 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
6040 | { | |
6041 | if (got_type & GOT_TLSDESC_GD) | |
6042 | { | |
6043 | htab->root.srelplt->size += RELOC_SIZE (htab); | |
6044 | /* Note reloc_count not incremented here! We have | |
6045 | already adjusted reloc_count for this relocation | |
6046 | type. */ | |
6047 | ||
6048 | /* TLSDESC PLT is now needed, but not yet determined. */ | |
6049 | htab->tlsdesc_plt = (bfd_vma) - 1; | |
6050 | } | |
6051 | ||
6052 | if (got_type & GOT_TLS_GD) | |
6053 | htab->root.srelgot->size += RELOC_SIZE (htab) * 2; | |
6054 | ||
6055 | if (got_type & GOT_TLS_IE) | |
6056 | htab->root.srelgot->size += RELOC_SIZE (htab); | |
6057 | } | |
6058 | } | |
6059 | } | |
6060 | else | |
6061 | { | |
6062 | h->got.offset = (bfd_vma) - 1; | |
6063 | } | |
6064 | ||
6065 | if (eh->dyn_relocs == NULL) | |
6066 | return TRUE; | |
6067 | ||
6068 | /* In the shared -Bsymbolic case, discard space allocated for | |
6069 | dynamic pc-relative relocs against symbols which turn out to be | |
6070 | defined in regular objects. For the normal shared case, discard | |
6071 | space for pc-relative relocs that have become local due to symbol | |
6072 | visibility changes. */ | |
6073 | ||
6074 | if (info->shared) | |
6075 | { | |
6076 | /* Relocs that use pc_count are those that appear on a call | |
6077 | insn, or certain REL relocs that can generated via assembly. | |
6078 | We want calls to protected symbols to resolve directly to the | |
6079 | function rather than going via the plt. If people want | |
6080 | function pointer comparisons to work as expected then they | |
6081 | should avoid writing weird assembly. */ | |
6082 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
6083 | { | |
6084 | struct elf_dyn_relocs **pp; | |
6085 | ||
6086 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) | |
6087 | { | |
6088 | p->count -= p->pc_count; | |
6089 | p->pc_count = 0; | |
6090 | if (p->count == 0) | |
6091 | *pp = p->next; | |
6092 | else | |
6093 | pp = &p->next; | |
6094 | } | |
6095 | } | |
6096 | ||
6097 | /* Also discard relocs on undefined weak syms with non-default | |
6098 | visibility. */ | |
6099 | if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak) | |
6100 | { | |
6101 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
6102 | eh->dyn_relocs = NULL; | |
6103 | ||
6104 | /* Make sure undefined weak symbols are output as a dynamic | |
6105 | symbol in PIEs. */ | |
6106 | else if (h->dynindx == -1 | |
6107 | && !h->forced_local | |
6108 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
6109 | return FALSE; | |
6110 | } | |
6111 | ||
6112 | } | |
6113 | else if (ELIMINATE_COPY_RELOCS) | |
6114 | { | |
6115 | /* For the non-shared case, discard space for relocs against | |
6116 | symbols which turn out to need copy relocs or are not | |
6117 | dynamic. */ | |
6118 | ||
6119 | if (!h->non_got_ref | |
6120 | && ((h->def_dynamic | |
6121 | && !h->def_regular) | |
6122 | || (htab->root.dynamic_sections_created | |
6123 | && (h->root.type == bfd_link_hash_undefweak | |
6124 | || h->root.type == bfd_link_hash_undefined)))) | |
6125 | { | |
6126 | /* Make sure this symbol is output as a dynamic symbol. | |
6127 | Undefined weak syms won't yet be marked as dynamic. */ | |
6128 | if (h->dynindx == -1 | |
6129 | && !h->forced_local | |
6130 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
6131 | return FALSE; | |
6132 | ||
6133 | /* If that succeeded, we know we'll be keeping all the | |
6134 | relocs. */ | |
6135 | if (h->dynindx != -1) | |
6136 | goto keep; | |
6137 | } | |
6138 | ||
6139 | eh->dyn_relocs = NULL; | |
6140 | ||
6141 | keep:; | |
6142 | } | |
6143 | ||
6144 | /* Finally, allocate space. */ | |
6145 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
6146 | { | |
6147 | asection *sreloc; | |
6148 | ||
6149 | sreloc = elf_section_data (p->sec)->sreloc; | |
6150 | ||
6151 | BFD_ASSERT (sreloc != NULL); | |
6152 | ||
6153 | sreloc->size += p->count * RELOC_SIZE (htab); | |
6154 | } | |
6155 | ||
6156 | return TRUE; | |
6157 | } | |
6158 | ||
6159 | ||
6160 | ||
6161 | ||
6162 | /* This is the most important function of all . Innocuosly named | |
6163 | though ! */ | |
6164 | static bfd_boolean | |
6165 | elf64_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, | |
6166 | struct bfd_link_info *info) | |
6167 | { | |
6168 | struct elf64_aarch64_link_hash_table *htab; | |
6169 | bfd *dynobj; | |
6170 | asection *s; | |
6171 | bfd_boolean relocs; | |
6172 | bfd *ibfd; | |
6173 | ||
6174 | htab = elf64_aarch64_hash_table ((info)); | |
6175 | dynobj = htab->root.dynobj; | |
6176 | ||
6177 | BFD_ASSERT (dynobj != NULL); | |
6178 | ||
6179 | if (htab->root.dynamic_sections_created) | |
6180 | { | |
6181 | if (info->executable) | |
6182 | { | |
6183 | s = bfd_get_linker_section (dynobj, ".interp"); | |
6184 | if (s == NULL) | |
6185 | abort (); | |
6186 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
6187 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
6188 | } | |
6189 | } | |
6190 | ||
6191 | /* Set up .got offsets for local syms, and space for local dynamic | |
6192 | relocs. */ | |
6193 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
6194 | { | |
6195 | struct elf_aarch64_local_symbol *locals = NULL; | |
6196 | Elf_Internal_Shdr *symtab_hdr; | |
6197 | asection *srel; | |
6198 | unsigned int i; | |
6199 | ||
6200 | if (!is_aarch64_elf (ibfd)) | |
6201 | continue; | |
6202 | ||
6203 | for (s = ibfd->sections; s != NULL; s = s->next) | |
6204 | { | |
6205 | struct elf_dyn_relocs *p; | |
6206 | ||
6207 | for (p = (struct elf_dyn_relocs *) | |
6208 | (elf_section_data (s)->local_dynrel); p != NULL; p = p->next) | |
6209 | { | |
6210 | if (!bfd_is_abs_section (p->sec) | |
6211 | && bfd_is_abs_section (p->sec->output_section)) | |
6212 | { | |
6213 | /* Input section has been discarded, either because | |
6214 | it is a copy of a linkonce section or due to | |
6215 | linker script /DISCARD/, so we'll be discarding | |
6216 | the relocs too. */ | |
6217 | } | |
6218 | else if (p->count != 0) | |
6219 | { | |
6220 | srel = elf_section_data (p->sec)->sreloc; | |
6221 | srel->size += p->count * RELOC_SIZE (htab); | |
6222 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) | |
6223 | info->flags |= DF_TEXTREL; | |
6224 | } | |
6225 | } | |
6226 | } | |
6227 | ||
6228 | locals = elf64_aarch64_locals (ibfd); | |
6229 | if (!locals) | |
6230 | continue; | |
6231 | ||
6232 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
6233 | srel = htab->root.srelgot; | |
6234 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
6235 | { | |
6236 | locals[i].got_offset = (bfd_vma) - 1; | |
6237 | locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1; | |
6238 | if (locals[i].got_refcount > 0) | |
6239 | { | |
6240 | unsigned got_type = locals[i].got_type; | |
6241 | if (got_type & GOT_TLSDESC_GD) | |
6242 | { | |
6243 | locals[i].tlsdesc_got_jump_table_offset = | |
6244 | (htab->root.sgotplt->size | |
6245 | - aarch64_compute_jump_table_size (htab)); | |
6246 | htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2; | |
6247 | locals[i].got_offset = (bfd_vma) - 2; | |
6248 | } | |
6249 | ||
6250 | if (got_type & GOT_TLS_GD) | |
6251 | { | |
6252 | locals[i].got_offset = htab->root.sgot->size; | |
6253 | htab->root.sgot->size += GOT_ENTRY_SIZE * 2; | |
6254 | } | |
6255 | ||
6256 | if (got_type & GOT_TLS_IE) | |
6257 | { | |
6258 | locals[i].got_offset = htab->root.sgot->size; | |
6259 | htab->root.sgot->size += GOT_ENTRY_SIZE; | |
6260 | } | |
6261 | ||
6262 | if (got_type == GOT_UNKNOWN) | |
6263 | { | |
6264 | } | |
6265 | ||
6266 | if (got_type == GOT_NORMAL) | |
6267 | { | |
6268 | } | |
6269 | ||
6270 | if (info->shared) | |
6271 | { | |
6272 | if (got_type & GOT_TLSDESC_GD) | |
6273 | { | |
6274 | htab->root.srelplt->size += RELOC_SIZE (htab); | |
6275 | /* Note RELOC_COUNT not incremented here! */ | |
6276 | htab->tlsdesc_plt = (bfd_vma) - 1; | |
6277 | } | |
6278 | ||
6279 | if (got_type & GOT_TLS_GD) | |
6280 | htab->root.srelgot->size += RELOC_SIZE (htab) * 2; | |
6281 | ||
6282 | if (got_type & GOT_TLS_IE) | |
6283 | htab->root.srelgot->size += RELOC_SIZE (htab); | |
6284 | } | |
6285 | } | |
6286 | else | |
6287 | { | |
6288 | locals[i].got_refcount = (bfd_vma) - 1; | |
6289 | } | |
6290 | } | |
6291 | } | |
6292 | ||
6293 | ||
6294 | /* Allocate global sym .plt and .got entries, and space for global | |
6295 | sym dynamic relocs. */ | |
6296 | elf_link_hash_traverse (&htab->root, elf64_aarch64_allocate_dynrelocs, | |
6297 | info); | |
6298 | ||
6299 | ||
6300 | /* For every jump slot reserved in the sgotplt, reloc_count is | |
6301 | incremented. However, when we reserve space for TLS descriptors, | |
6302 | it's not incremented, so in order to compute the space reserved | |
6303 | for them, it suffices to multiply the reloc count by the jump | |
6304 | slot size. */ | |
6305 | ||
6306 | if (htab->root.srelplt) | |
6307 | htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab); | |
6308 | ||
6309 | if (htab->tlsdesc_plt) | |
6310 | { | |
6311 | if (htab->root.splt->size == 0) | |
6312 | htab->root.splt->size += PLT_ENTRY_SIZE; | |
6313 | ||
6314 | htab->tlsdesc_plt = htab->root.splt->size; | |
6315 | htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE; | |
6316 | ||
6317 | /* If we're not using lazy TLS relocations, don't generate the | |
6318 | GOT entry required. */ | |
6319 | if (!(info->flags & DF_BIND_NOW)) | |
6320 | { | |
6321 | htab->dt_tlsdesc_got = htab->root.sgot->size; | |
6322 | htab->root.sgot->size += GOT_ENTRY_SIZE; | |
6323 | } | |
6324 | } | |
6325 | ||
6326 | /* We now have determined the sizes of the various dynamic sections. | |
6327 | Allocate memory for them. */ | |
6328 | relocs = FALSE; | |
6329 | for (s = dynobj->sections; s != NULL; s = s->next) | |
6330 | { | |
6331 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
6332 | continue; | |
6333 | ||
6334 | if (s == htab->root.splt | |
6335 | || s == htab->root.sgot | |
6336 | || s == htab->root.sgotplt | |
6337 | || s == htab->root.iplt | |
6338 | || s == htab->root.igotplt || s == htab->sdynbss) | |
6339 | { | |
6340 | /* Strip this section if we don't need it; see the | |
6341 | comment below. */ | |
6342 | } | |
6343 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) | |
6344 | { | |
6345 | if (s->size != 0 && s != htab->root.srelplt) | |
6346 | relocs = TRUE; | |
6347 | ||
6348 | /* We use the reloc_count field as a counter if we need | |
6349 | to copy relocs into the output file. */ | |
6350 | if (s != htab->root.srelplt) | |
6351 | s->reloc_count = 0; | |
6352 | } | |
6353 | else | |
6354 | { | |
6355 | /* It's not one of our sections, so don't allocate space. */ | |
6356 | continue; | |
6357 | } | |
6358 | ||
6359 | if (s->size == 0) | |
6360 | { | |
6361 | /* If we don't need this section, strip it from the | |
6362 | output file. This is mostly to handle .rela.bss and | |
6363 | .rela.plt. We must create both sections in | |
6364 | create_dynamic_sections, because they must be created | |
6365 | before the linker maps input sections to output | |
6366 | sections. The linker does that before | |
6367 | adjust_dynamic_symbol is called, and it is that | |
6368 | function which decides whether anything needs to go | |
6369 | into these sections. */ | |
6370 | ||
6371 | s->flags |= SEC_EXCLUDE; | |
6372 | continue; | |
6373 | } | |
6374 | ||
6375 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
6376 | continue; | |
6377 | ||
6378 | /* Allocate memory for the section contents. We use bfd_zalloc | |
6379 | here in case unused entries are not reclaimed before the | |
6380 | section's contents are written out. This should not happen, | |
6381 | but this way if it does, we get a R_AARCH64_NONE reloc instead | |
6382 | of garbage. */ | |
6383 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
6384 | if (s->contents == NULL) | |
6385 | return FALSE; | |
6386 | } | |
6387 | ||
6388 | if (htab->root.dynamic_sections_created) | |
6389 | { | |
6390 | /* Add some entries to the .dynamic section. We fill in the | |
6391 | values later, in elf64_aarch64_finish_dynamic_sections, but we | |
6392 | must add the entries now so that we get the correct size for | |
6393 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
6394 | dynamic linker and used by the debugger. */ | |
6395 | #define add_dynamic_entry(TAG, VAL) \ | |
6396 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
6397 | ||
6398 | if (info->executable) | |
6399 | { | |
6400 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
6401 | return FALSE; | |
6402 | } | |
6403 | ||
6404 | if (htab->root.splt->size != 0) | |
6405 | { | |
6406 | if (!add_dynamic_entry (DT_PLTGOT, 0) | |
6407 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
6408 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
6409 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
6410 | return FALSE; | |
6411 | ||
6412 | if (htab->tlsdesc_plt | |
6413 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
6414 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
6415 | return FALSE; | |
6416 | } | |
6417 | ||
6418 | if (relocs) | |
6419 | { | |
6420 | if (!add_dynamic_entry (DT_RELA, 0) | |
6421 | || !add_dynamic_entry (DT_RELASZ, 0) | |
6422 | || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab))) | |
6423 | return FALSE; | |
6424 | ||
6425 | /* If any dynamic relocs apply to a read-only section, | |
6426 | then we need a DT_TEXTREL entry. */ | |
6427 | if ((info->flags & DF_TEXTREL) != 0) | |
6428 | { | |
6429 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
6430 | return FALSE; | |
6431 | } | |
6432 | } | |
6433 | } | |
6434 | #undef add_dynamic_entry | |
6435 | ||
6436 | return TRUE; | |
6437 | ||
6438 | ||
6439 | } | |
6440 | ||
6441 | static inline void | |
6442 | elf64_aarch64_update_plt_entry (bfd *output_bfd, | |
6443 | unsigned int r_type, | |
6444 | bfd_byte *plt_entry, bfd_vma value) | |
6445 | { | |
6446 | reloc_howto_type *howto; | |
6447 | howto = elf64_aarch64_howto_from_type (r_type); | |
6448 | bfd_elf_aarch64_put_addend (output_bfd, plt_entry, howto, value); | |
6449 | } | |
6450 | ||
6451 | static void | |
6452 | elf64_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h, | |
6453 | struct elf64_aarch64_link_hash_table | |
6454 | *htab, bfd *output_bfd) | |
6455 | { | |
6456 | bfd_byte *plt_entry; | |
6457 | bfd_vma plt_index; | |
6458 | bfd_vma got_offset; | |
6459 | bfd_vma gotplt_entry_address; | |
6460 | bfd_vma plt_entry_address; | |
6461 | Elf_Internal_Rela rela; | |
6462 | bfd_byte *loc; | |
6463 | ||
6464 | plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size; | |
6465 | ||
6466 | /* Offset in the GOT is PLT index plus got GOT headers(3) | |
6467 | times 8. */ | |
6468 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; | |
6469 | plt_entry = htab->root.splt->contents + h->plt.offset; | |
6470 | plt_entry_address = htab->root.splt->output_section->vma | |
6471 | + htab->root.splt->output_section->output_offset + h->plt.offset; | |
6472 | gotplt_entry_address = htab->root.sgotplt->output_section->vma + | |
6473 | htab->root.sgotplt->output_offset + got_offset; | |
6474 | ||
6475 | /* Copy in the boiler-plate for the PLTn entry. */ | |
6476 | memcpy (plt_entry, elf64_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE); | |
6477 | ||
6478 | /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. | |
6479 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ | |
6480 | elf64_aarch64_update_plt_entry (output_bfd, R_AARCH64_ADR_PREL_PG_HI21, | |
6481 | plt_entry, | |
6482 | PG (gotplt_entry_address) - | |
6483 | PG (plt_entry_address)); | |
6484 | ||
6485 | /* Fill in the lo12 bits for the load from the pltgot. */ | |
6486 | elf64_aarch64_update_plt_entry (output_bfd, R_AARCH64_LDST64_ABS_LO12_NC, | |
6487 | plt_entry + 4, | |
6488 | PG_OFFSET (gotplt_entry_address)); | |
6489 | ||
6490 | /* Fill in the the lo12 bits for the add from the pltgot entry. */ | |
6491 | elf64_aarch64_update_plt_entry (output_bfd, R_AARCH64_ADD_ABS_LO12_NC, | |
6492 | plt_entry + 8, | |
6493 | PG_OFFSET (gotplt_entry_address)); | |
6494 | ||
6495 | /* All the GOTPLT Entries are essentially initialized to PLT0. */ | |
6496 | bfd_put_64 (output_bfd, | |
6497 | (htab->root.splt->output_section->vma | |
6498 | + htab->root.splt->output_offset), | |
6499 | htab->root.sgotplt->contents + got_offset); | |
6500 | ||
6501 | /* Fill in the entry in the .rela.plt section. */ | |
6502 | rela.r_offset = gotplt_entry_address; | |
6503 | rela.r_info = ELF64_R_INFO (h->dynindx, R_AARCH64_JUMP_SLOT); | |
6504 | rela.r_addend = 0; | |
6505 | ||
6506 | /* Compute the relocation entry to used based on PLT index and do | |
6507 | not adjust reloc_count. The reloc_count has already been adjusted | |
6508 | to account for this entry. */ | |
6509 | loc = htab->root.srelplt->contents + plt_index * RELOC_SIZE (htab); | |
6510 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); | |
6511 | } | |
6512 | ||
6513 | /* Size sections even though they're not dynamic. We use it to setup | |
6514 | _TLS_MODULE_BASE_, if needed. */ | |
6515 | ||
6516 | static bfd_boolean | |
6517 | elf64_aarch64_always_size_sections (bfd *output_bfd, | |
6518 | struct bfd_link_info *info) | |
6519 | { | |
6520 | asection *tls_sec; | |
6521 | ||
6522 | if (info->relocatable) | |
6523 | return TRUE; | |
6524 | ||
6525 | tls_sec = elf_hash_table (info)->tls_sec; | |
6526 | ||
6527 | if (tls_sec) | |
6528 | { | |
6529 | struct elf_link_hash_entry *tlsbase; | |
6530 | ||
6531 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
6532 | "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE); | |
6533 | ||
6534 | if (tlsbase) | |
6535 | { | |
6536 | struct bfd_link_hash_entry *h = NULL; | |
6537 | const struct elf_backend_data *bed = | |
6538 | get_elf_backend_data (output_bfd); | |
6539 | ||
6540 | if (!(_bfd_generic_link_add_one_symbol | |
6541 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
6542 | tls_sec, 0, NULL, FALSE, bed->collect, &h))) | |
6543 | return FALSE; | |
6544 | ||
6545 | tlsbase->type = STT_TLS; | |
6546 | tlsbase = (struct elf_link_hash_entry *) h; | |
6547 | tlsbase->def_regular = 1; | |
6548 | tlsbase->other = STV_HIDDEN; | |
6549 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
6550 | } | |
6551 | } | |
6552 | ||
6553 | return TRUE; | |
6554 | } | |
6555 | ||
6556 | /* Finish up dynamic symbol handling. We set the contents of various | |
6557 | dynamic sections here. */ | |
6558 | static bfd_boolean | |
6559 | elf64_aarch64_finish_dynamic_symbol (bfd *output_bfd, | |
6560 | struct bfd_link_info *info, | |
6561 | struct elf_link_hash_entry *h, | |
6562 | Elf_Internal_Sym *sym) | |
6563 | { | |
6564 | struct elf64_aarch64_link_hash_table *htab; | |
6565 | htab = elf64_aarch64_hash_table (info); | |
6566 | ||
6567 | if (h->plt.offset != (bfd_vma) - 1) | |
6568 | { | |
6569 | /* This symbol has an entry in the procedure linkage table. Set | |
6570 | it up. */ | |
6571 | ||
6572 | if (h->dynindx == -1 | |
6573 | || htab->root.splt == NULL | |
6574 | || htab->root.sgotplt == NULL || htab->root.srelplt == NULL) | |
6575 | abort (); | |
6576 | ||
6577 | elf64_aarch64_create_small_pltn_entry (h, htab, output_bfd); | |
6578 | if (!h->def_regular) | |
6579 | { | |
6580 | /* Mark the symbol as undefined, rather than as defined in | |
6581 | the .plt section. Leave the value alone. This is a clue | |
6582 | for the dynamic linker, to make function pointer | |
6583 | comparisons work between an application and shared | |
6584 | library. */ | |
6585 | sym->st_shndx = SHN_UNDEF; | |
6586 | } | |
6587 | } | |
6588 | ||
6589 | if (h->got.offset != (bfd_vma) - 1 | |
6590 | && elf64_aarch64_hash_entry (h)->got_type == GOT_NORMAL) | |
6591 | { | |
6592 | Elf_Internal_Rela rela; | |
6593 | bfd_byte *loc; | |
6594 | ||
6595 | /* This symbol has an entry in the global offset table. Set it | |
6596 | up. */ | |
6597 | if (htab->root.sgot == NULL || htab->root.srelgot == NULL) | |
6598 | abort (); | |
6599 | ||
6600 | rela.r_offset = (htab->root.sgot->output_section->vma | |
6601 | + htab->root.sgot->output_offset | |
6602 | + (h->got.offset & ~(bfd_vma) 1)); | |
6603 | ||
6604 | if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h)) | |
6605 | { | |
6606 | if (!h->def_regular) | |
6607 | return FALSE; | |
6608 | ||
6609 | BFD_ASSERT ((h->got.offset & 1) != 0); | |
6610 | rela.r_info = ELF64_R_INFO (0, R_AARCH64_RELATIVE); | |
6611 | rela.r_addend = (h->root.u.def.value | |
6612 | + h->root.u.def.section->output_section->vma | |
6613 | + h->root.u.def.section->output_offset); | |
6614 | } | |
6615 | else | |
6616 | { | |
6617 | BFD_ASSERT ((h->got.offset & 1) == 0); | |
6618 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6619 | htab->root.sgot->contents + h->got.offset); | |
6620 | rela.r_info = ELF64_R_INFO (h->dynindx, R_AARCH64_GLOB_DAT); | |
6621 | rela.r_addend = 0; | |
6622 | } | |
6623 | ||
6624 | loc = htab->root.srelgot->contents; | |
6625 | loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab); | |
6626 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); | |
6627 | } | |
6628 | ||
6629 | if (h->needs_copy) | |
6630 | { | |
6631 | Elf_Internal_Rela rela; | |
6632 | bfd_byte *loc; | |
6633 | ||
6634 | /* This symbol needs a copy reloc. Set it up. */ | |
6635 | ||
6636 | if (h->dynindx == -1 | |
6637 | || (h->root.type != bfd_link_hash_defined | |
6638 | && h->root.type != bfd_link_hash_defweak) | |
6639 | || htab->srelbss == NULL) | |
6640 | abort (); | |
6641 | ||
6642 | rela.r_offset = (h->root.u.def.value | |
6643 | + h->root.u.def.section->output_section->vma | |
6644 | + h->root.u.def.section->output_offset); | |
6645 | rela.r_info = ELF64_R_INFO (h->dynindx, R_AARCH64_COPY); | |
6646 | rela.r_addend = 0; | |
6647 | loc = htab->srelbss->contents; | |
6648 | loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab); | |
6649 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); | |
6650 | } | |
6651 | ||
6652 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may | |
6653 | be NULL for local symbols. */ | |
6654 | if (sym != NULL | |
9637f6ef | 6655 | && (h == elf_hash_table (info)->hdynamic |
a06ea964 NC |
6656 | || h == elf_hash_table (info)->hgot)) |
6657 | sym->st_shndx = SHN_ABS; | |
6658 | ||
6659 | return TRUE; | |
6660 | } | |
6661 | ||
6662 | static void | |
6663 | elf64_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED, | |
6664 | struct elf64_aarch64_link_hash_table | |
6665 | *htab) | |
6666 | { | |
6667 | /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between | |
6668 | small and large plts and at the minute just generates | |
6669 | the small PLT. */ | |
6670 | ||
6671 | /* PLT0 of the small PLT looks like this - | |
6672 | stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack. | |
6673 | adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT | |
6674 | ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the | |
6675 | // symbol resolver | |
6676 | add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the | |
6677 | // GOTPLT entry for this. | |
6678 | br x17 | |
6679 | */ | |
6680 | bfd_vma plt_got_base; | |
6681 | bfd_vma plt_base; | |
6682 | ||
6683 | ||
6684 | memcpy (htab->root.splt->contents, elf64_aarch64_small_plt0_entry, | |
6685 | PLT_ENTRY_SIZE); | |
6686 | elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize = | |
6687 | PLT_ENTRY_SIZE; | |
6688 | ||
6689 | plt_got_base = (htab->root.sgotplt->output_section->vma | |
6690 | + htab->root.sgotplt->output_offset); | |
6691 | ||
6692 | plt_base = htab->root.splt->output_section->vma + | |
6693 | htab->root.splt->output_section->output_offset; | |
6694 | ||
6695 | /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. | |
6696 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ | |
6697 | elf64_aarch64_update_plt_entry (output_bfd, R_AARCH64_ADR_PREL_PG_HI21, | |
6698 | htab->root.splt->contents + 4, | |
6699 | PG (plt_got_base + 16) - PG (plt_base + 4)); | |
6700 | ||
6701 | elf64_aarch64_update_plt_entry (output_bfd, R_AARCH64_LDST64_ABS_LO12_NC, | |
6702 | htab->root.splt->contents + 8, | |
6703 | PG_OFFSET (plt_got_base + 16)); | |
6704 | ||
6705 | elf64_aarch64_update_plt_entry (output_bfd, R_AARCH64_ADD_ABS_LO12_NC, | |
6706 | htab->root.splt->contents + 12, | |
6707 | PG_OFFSET (plt_got_base + 16)); | |
6708 | } | |
6709 | ||
6710 | static bfd_boolean | |
6711 | elf64_aarch64_finish_dynamic_sections (bfd *output_bfd, | |
6712 | struct bfd_link_info *info) | |
6713 | { | |
6714 | struct elf64_aarch64_link_hash_table *htab; | |
6715 | bfd *dynobj; | |
6716 | asection *sdyn; | |
6717 | ||
6718 | htab = elf64_aarch64_hash_table (info); | |
6719 | dynobj = htab->root.dynobj; | |
6720 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); | |
6721 | ||
6722 | if (htab->root.dynamic_sections_created) | |
6723 | { | |
6724 | Elf64_External_Dyn *dyncon, *dynconend; | |
6725 | ||
6726 | if (sdyn == NULL || htab->root.sgot == NULL) | |
6727 | abort (); | |
6728 | ||
6729 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
6730 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); | |
6731 | for (; dyncon < dynconend; dyncon++) | |
6732 | { | |
6733 | Elf_Internal_Dyn dyn; | |
6734 | asection *s; | |
6735 | ||
6736 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
6737 | ||
6738 | switch (dyn.d_tag) | |
6739 | { | |
6740 | default: | |
6741 | continue; | |
6742 | ||
6743 | case DT_PLTGOT: | |
6744 | s = htab->root.sgotplt; | |
6745 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
6746 | break; | |
6747 | ||
6748 | case DT_JMPREL: | |
6749 | dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma; | |
6750 | break; | |
6751 | ||
6752 | case DT_PLTRELSZ: | |
6753 | s = htab->root.srelplt->output_section; | |
6754 | dyn.d_un.d_val = s->size; | |
6755 | break; | |
6756 | ||
6757 | case DT_RELASZ: | |
6758 | /* The procedure linkage table relocs (DT_JMPREL) should | |
6759 | not be included in the overall relocs (DT_RELA). | |
6760 | Therefore, we override the DT_RELASZ entry here to | |
6761 | make it not include the JMPREL relocs. Since the | |
6762 | linker script arranges for .rela.plt to follow all | |
6763 | other relocation sections, we don't have to worry | |
6764 | about changing the DT_RELA entry. */ | |
6765 | if (htab->root.srelplt != NULL) | |
6766 | { | |
6767 | s = htab->root.srelplt->output_section; | |
6768 | dyn.d_un.d_val -= s->size; | |
6769 | } | |
6770 | break; | |
6771 | ||
6772 | case DT_TLSDESC_PLT: | |
6773 | s = htab->root.splt; | |
6774 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
6775 | + htab->tlsdesc_plt; | |
6776 | break; | |
6777 | ||
6778 | case DT_TLSDESC_GOT: | |
6779 | s = htab->root.sgot; | |
6780 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
6781 | + htab->dt_tlsdesc_got; | |
6782 | break; | |
6783 | } | |
6784 | ||
6785 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); | |
6786 | } | |
6787 | ||
6788 | } | |
6789 | ||
6790 | /* Fill in the special first entry in the procedure linkage table. */ | |
6791 | if (htab->root.splt && htab->root.splt->size > 0) | |
6792 | { | |
6793 | elf64_aarch64_init_small_plt0_entry (output_bfd, htab); | |
6794 | ||
6795 | elf_section_data (htab->root.splt->output_section)-> | |
6796 | this_hdr.sh_entsize = htab->plt_entry_size; | |
6797 | ||
6798 | ||
6799 | if (htab->tlsdesc_plt) | |
6800 | { | |
6801 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6802 | htab->root.sgot->contents + htab->dt_tlsdesc_got); | |
6803 | ||
6804 | memcpy (htab->root.splt->contents + htab->tlsdesc_plt, | |
6805 | elf64_aarch64_tlsdesc_small_plt_entry, | |
6806 | sizeof (elf64_aarch64_tlsdesc_small_plt_entry)); | |
6807 | ||
6808 | { | |
6809 | bfd_vma adrp1_addr = | |
6810 | htab->root.splt->output_section->vma | |
6811 | + htab->root.splt->output_offset + htab->tlsdesc_plt + 4; | |
6812 | ||
6813 | bfd_vma adrp2_addr = | |
6814 | htab->root.splt->output_section->vma | |
6815 | + htab->root.splt->output_offset + htab->tlsdesc_plt + 8; | |
6816 | ||
6817 | bfd_vma got_addr = | |
6818 | htab->root.sgot->output_section->vma | |
6819 | + htab->root.sgot->output_offset; | |
6820 | ||
6821 | bfd_vma pltgot_addr = | |
6822 | htab->root.sgotplt->output_section->vma | |
6823 | + htab->root.sgotplt->output_offset; | |
6824 | ||
6825 | bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got; | |
6826 | bfd_vma opcode; | |
6827 | ||
6828 | /* adrp x2, DT_TLSDESC_GOT */ | |
6829 | opcode = bfd_get_32 (output_bfd, | |
6830 | htab->root.splt->contents | |
6831 | + htab->tlsdesc_plt + 4); | |
6832 | opcode = reencode_adr_imm | |
6833 | (opcode, (PG (dt_tlsdesc_got) - PG (adrp1_addr)) >> 12); | |
6834 | bfd_put_32 (output_bfd, opcode, | |
6835 | htab->root.splt->contents + htab->tlsdesc_plt + 4); | |
6836 | ||
6837 | /* adrp x3, 0 */ | |
6838 | opcode = bfd_get_32 (output_bfd, | |
6839 | htab->root.splt->contents | |
6840 | + htab->tlsdesc_plt + 8); | |
6841 | opcode = reencode_adr_imm | |
6842 | (opcode, (PG (pltgot_addr) - PG (adrp2_addr)) >> 12); | |
6843 | bfd_put_32 (output_bfd, opcode, | |
6844 | htab->root.splt->contents + htab->tlsdesc_plt + 8); | |
6845 | ||
6846 | /* ldr x2, [x2, #0] */ | |
6847 | opcode = bfd_get_32 (output_bfd, | |
6848 | htab->root.splt->contents | |
6849 | + htab->tlsdesc_plt + 12); | |
6850 | opcode = reencode_ldst_pos_imm (opcode, | |
6851 | PG_OFFSET (dt_tlsdesc_got) >> 3); | |
6852 | bfd_put_32 (output_bfd, opcode, | |
6853 | htab->root.splt->contents + htab->tlsdesc_plt + 12); | |
6854 | ||
6855 | /* add x3, x3, 0 */ | |
6856 | opcode = bfd_get_32 (output_bfd, | |
6857 | htab->root.splt->contents | |
6858 | + htab->tlsdesc_plt + 16); | |
6859 | opcode = reencode_add_imm (opcode, PG_OFFSET (pltgot_addr)); | |
6860 | bfd_put_32 (output_bfd, opcode, | |
6861 | htab->root.splt->contents + htab->tlsdesc_plt + 16); | |
6862 | } | |
6863 | } | |
6864 | } | |
6865 | ||
6866 | if (htab->root.sgotplt) | |
6867 | { | |
6868 | if (bfd_is_abs_section (htab->root.sgotplt->output_section)) | |
6869 | { | |
6870 | (*_bfd_error_handler) | |
6871 | (_("discarded output section: `%A'"), htab->root.sgotplt); | |
6872 | return FALSE; | |
6873 | } | |
6874 | ||
6875 | /* Fill in the first three entries in the global offset table. */ | |
6876 | if (htab->root.sgotplt->size > 0) | |
6877 | { | |
6878 | /* Set the first entry in the global offset table to the address of | |
6879 | the dynamic section. */ | |
6880 | if (sdyn == NULL) | |
6881 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6882 | htab->root.sgotplt->contents); | |
6883 | else | |
6884 | bfd_put_64 (output_bfd, | |
6885 | sdyn->output_section->vma + sdyn->output_offset, | |
6886 | htab->root.sgotplt->contents); | |
6887 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
6888 | bfd_put_64 (output_bfd, | |
6889 | (bfd_vma) 0, | |
6890 | htab->root.sgotplt->contents + GOT_ENTRY_SIZE); | |
6891 | bfd_put_64 (output_bfd, | |
6892 | (bfd_vma) 0, | |
6893 | htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2); | |
6894 | } | |
6895 | ||
6896 | elf_section_data (htab->root.sgotplt->output_section)-> | |
6897 | this_hdr.sh_entsize = GOT_ENTRY_SIZE; | |
6898 | } | |
6899 | ||
6900 | if (htab->root.sgot && htab->root.sgot->size > 0) | |
6901 | elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize | |
6902 | = GOT_ENTRY_SIZE; | |
6903 | ||
6904 | return TRUE; | |
6905 | } | |
6906 | ||
6907 | /* Return address for Ith PLT stub in section PLT, for relocation REL | |
6908 | or (bfd_vma) -1 if it should not be included. */ | |
6909 | ||
6910 | static bfd_vma | |
6911 | elf64_aarch64_plt_sym_val (bfd_vma i, const asection *plt, | |
6912 | const arelent *rel ATTRIBUTE_UNUSED) | |
6913 | { | |
6914 | return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE; | |
6915 | } | |
6916 | ||
6917 | ||
6918 | /* We use this so we can override certain functions | |
6919 | (though currently we don't). */ | |
6920 | ||
6921 | const struct elf_size_info elf64_aarch64_size_info = | |
6922 | { | |
6923 | sizeof (Elf64_External_Ehdr), | |
6924 | sizeof (Elf64_External_Phdr), | |
6925 | sizeof (Elf64_External_Shdr), | |
6926 | sizeof (Elf64_External_Rel), | |
6927 | sizeof (Elf64_External_Rela), | |
6928 | sizeof (Elf64_External_Sym), | |
6929 | sizeof (Elf64_External_Dyn), | |
6930 | sizeof (Elf_External_Note), | |
6931 | 4, /* Hash table entry size. */ | |
6932 | 1, /* Internal relocs per external relocs. */ | |
6933 | 64, /* Arch size. */ | |
6934 | 3, /* Log_file_align. */ | |
6935 | ELFCLASS64, EV_CURRENT, | |
6936 | bfd_elf64_write_out_phdrs, | |
6937 | bfd_elf64_write_shdrs_and_ehdr, | |
6938 | bfd_elf64_checksum_contents, | |
6939 | bfd_elf64_write_relocs, | |
6940 | bfd_elf64_swap_symbol_in, | |
6941 | bfd_elf64_swap_symbol_out, | |
6942 | bfd_elf64_slurp_reloc_table, | |
6943 | bfd_elf64_slurp_symbol_table, | |
6944 | bfd_elf64_swap_dyn_in, | |
6945 | bfd_elf64_swap_dyn_out, | |
6946 | bfd_elf64_swap_reloc_in, | |
6947 | bfd_elf64_swap_reloc_out, | |
6948 | bfd_elf64_swap_reloca_in, | |
6949 | bfd_elf64_swap_reloca_out | |
6950 | }; | |
6951 | ||
6952 | #define ELF_ARCH bfd_arch_aarch64 | |
6953 | #define ELF_MACHINE_CODE EM_AARCH64 | |
6954 | #define ELF_MAXPAGESIZE 0x10000 | |
6955 | #define ELF_MINPAGESIZE 0x1000 | |
6956 | #define ELF_COMMONPAGESIZE 0x1000 | |
6957 | ||
6958 | #define bfd_elf64_close_and_cleanup \ | |
6959 | elf64_aarch64_close_and_cleanup | |
6960 | ||
6961 | #define bfd_elf64_bfd_copy_private_bfd_data \ | |
6962 | elf64_aarch64_copy_private_bfd_data | |
6963 | ||
6964 | #define bfd_elf64_bfd_free_cached_info \ | |
6965 | elf64_aarch64_bfd_free_cached_info | |
6966 | ||
6967 | #define bfd_elf64_bfd_is_target_special_symbol \ | |
6968 | elf64_aarch64_is_target_special_symbol | |
6969 | ||
6970 | #define bfd_elf64_bfd_link_hash_table_create \ | |
6971 | elf64_aarch64_link_hash_table_create | |
6972 | ||
6973 | #define bfd_elf64_bfd_link_hash_table_free \ | |
6974 | elf64_aarch64_hash_table_free | |
6975 | ||
6976 | #define bfd_elf64_bfd_merge_private_bfd_data \ | |
6977 | elf64_aarch64_merge_private_bfd_data | |
6978 | ||
6979 | #define bfd_elf64_bfd_print_private_bfd_data \ | |
6980 | elf64_aarch64_print_private_bfd_data | |
6981 | ||
6982 | #define bfd_elf64_bfd_reloc_type_lookup \ | |
6983 | elf64_aarch64_reloc_type_lookup | |
6984 | ||
6985 | #define bfd_elf64_bfd_reloc_name_lookup \ | |
6986 | elf64_aarch64_reloc_name_lookup | |
6987 | ||
6988 | #define bfd_elf64_bfd_set_private_flags \ | |
6989 | elf64_aarch64_set_private_flags | |
6990 | ||
6991 | #define bfd_elf64_find_inliner_info \ | |
6992 | elf64_aarch64_find_inliner_info | |
6993 | ||
6994 | #define bfd_elf64_find_nearest_line \ | |
6995 | elf64_aarch64_find_nearest_line | |
6996 | ||
6997 | #define bfd_elf64_mkobject \ | |
6998 | elf64_aarch64_mkobject | |
6999 | ||
7000 | #define bfd_elf64_new_section_hook \ | |
7001 | elf64_aarch64_new_section_hook | |
7002 | ||
7003 | #define elf_backend_adjust_dynamic_symbol \ | |
7004 | elf64_aarch64_adjust_dynamic_symbol | |
7005 | ||
7006 | #define elf_backend_always_size_sections \ | |
7007 | elf64_aarch64_always_size_sections | |
7008 | ||
7009 | #define elf_backend_check_relocs \ | |
7010 | elf64_aarch64_check_relocs | |
7011 | ||
7012 | #define elf_backend_copy_indirect_symbol \ | |
7013 | elf64_aarch64_copy_indirect_symbol | |
7014 | ||
7015 | /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts | |
7016 | to them in our hash. */ | |
7017 | #define elf_backend_create_dynamic_sections \ | |
7018 | elf64_aarch64_create_dynamic_sections | |
7019 | ||
7020 | #define elf_backend_init_index_section \ | |
7021 | _bfd_elf_init_2_index_sections | |
7022 | ||
7023 | #define elf_backend_is_function_type \ | |
7024 | elf64_aarch64_is_function_type | |
7025 | ||
7026 | #define elf_backend_finish_dynamic_sections \ | |
7027 | elf64_aarch64_finish_dynamic_sections | |
7028 | ||
7029 | #define elf_backend_finish_dynamic_symbol \ | |
7030 | elf64_aarch64_finish_dynamic_symbol | |
7031 | ||
7032 | #define elf_backend_gc_sweep_hook \ | |
7033 | elf64_aarch64_gc_sweep_hook | |
7034 | ||
7035 | #define elf_backend_object_p \ | |
7036 | elf64_aarch64_object_p | |
7037 | ||
7038 | #define elf_backend_output_arch_local_syms \ | |
7039 | elf64_aarch64_output_arch_local_syms | |
7040 | ||
7041 | #define elf_backend_plt_sym_val \ | |
7042 | elf64_aarch64_plt_sym_val | |
7043 | ||
7044 | #define elf_backend_post_process_headers \ | |
7045 | elf64_aarch64_post_process_headers | |
7046 | ||
7047 | #define elf_backend_relocate_section \ | |
7048 | elf64_aarch64_relocate_section | |
7049 | ||
7050 | #define elf_backend_reloc_type_class \ | |
7051 | elf64_aarch64_reloc_type_class | |
7052 | ||
7053 | #define elf_backend_section_flags \ | |
7054 | elf64_aarch64_section_flags | |
7055 | ||
7056 | #define elf_backend_section_from_shdr \ | |
7057 | elf64_aarch64_section_from_shdr | |
7058 | ||
7059 | #define elf_backend_size_dynamic_sections \ | |
7060 | elf64_aarch64_size_dynamic_sections | |
7061 | ||
7062 | #define elf_backend_size_info \ | |
7063 | elf64_aarch64_size_info | |
7064 | ||
7065 | #define elf_backend_can_refcount 1 | |
7066 | #define elf_backend_can_gc_sections 0 | |
7067 | #define elf_backend_plt_readonly 1 | |
7068 | #define elf_backend_want_got_plt 1 | |
7069 | #define elf_backend_want_plt_sym 0 | |
7070 | #define elf_backend_may_use_rel_p 0 | |
7071 | #define elf_backend_may_use_rela_p 1 | |
7072 | #define elf_backend_default_use_rela_p 1 | |
7073 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3) | |
7074 | ||
7075 | #undef elf_backend_obj_attrs_section | |
7076 | #define elf_backend_obj_attrs_section ".ARM.attributes" | |
7077 | ||
7078 | #include "elf64-target.h" |