1 /* TILE-Gx-specific support for ELF.
2 Copyright (C) 2011-2016 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/tilegx.h"
26 #include "opcode/tilegx.h"
27 #include "libiberty.h"
28 #include "elfxx-tilegx.h"
29
30 #define ABI_64_P(abfd) \
31 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
32
33 #define TILEGX_ELF_WORD_BYTES(htab) \
34 ((htab)->bytes_per_word)
35
36 /* The size of an external RELA relocation. */
37 #define TILEGX_ELF_RELA_BYTES(htab) \
38 ((htab)->bytes_per_rela)
39
40 /* Both 32-bit and 64-bit tilegx encode this in an identical manner,
41 so just take advantage of that. */
42 #define TILEGX_ELF_R_TYPE(r_info) \
43 ((r_info) & 0xFF)
44
45 #define TILEGX_ELF_R_INFO(htab, in_rel, index, type) \
46 ((htab)->r_info (in_rel, index, type))
47
48 #define TILEGX_ELF_R_SYMNDX(htab, r_info) \
49 ((htab)->r_symndx(r_info))
50
51 #define TILEGX_ELF_DTPOFF_RELOC(htab) \
52 ((htab)->dtpoff_reloc)
53
54 #define TILEGX_ELF_DTPMOD_RELOC(htab) \
55 ((htab)->dtpmod_reloc)
56
57 #define TILEGX_ELF_TPOFF_RELOC(htab) \
58 ((htab)->tpoff_reloc)
59
60 #define TILEGX_ELF_PUT_WORD(htab, bfd, val, ptr) \
61 ((htab)->put_word (bfd, val, ptr))
62
63 /* The name of the dynamic interpreter. This is put in the .interp
64 section. */
65
66 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld.so.1"
67 #define ELF32_DYNAMIC_INTERPRETER "/lib32/ld.so.1"
68
69
70 static reloc_howto_type tilegx_elf_howto_table [] =
71 {
72 /* This reloc does nothing. */
73 HOWTO (R_TILEGX_NONE, /* type */
74 0, /* rightshift */
75 3, /* size (0 = byte, 1 = short, 2 = long) */
76 0, /* bitsize */
77 FALSE, /* pc_relative */
78 0, /* bitpos */
79 complain_overflow_dont, /* complain_on_overflow */
80 bfd_elf_generic_reloc, /* special_function */
81 "R_TILEGX_NONE", /* name */
82 FALSE, /* partial_inplace */
83 0, /* src_mask */
84 0, /* dst_mask */
85 FALSE), /* pcrel_offset */
86 #ifdef BFD64
87 /* A 64 bit absolute relocation. */
88 HOWTO (R_TILEGX_64, /* type */
89 0, /* rightshift */
90 4, /* size (0 = byte, 1 = short, 2 = long) */
91 64, /* bitsize */
92 FALSE, /* pc_relative */
93 0, /* bitpos */
94 complain_overflow_dont, /* complain_on_overflow */
95 bfd_elf_generic_reloc, /* special_function */
96 "R_TILEGX_64", /* name */
97 FALSE, /* partial_inplace */
98 0, /* src_mask */
99 0xffffffffffffffffULL, /* dst_mask */
100 FALSE), /* pcrel_offset */
101 #endif
102 /* A 32 bit absolute relocation. */
103 HOWTO (R_TILEGX_32, /* type */
104 0, /* rightshift */
105 2, /* size (0 = byte, 1 = short, 2 = long) */
106 32, /* bitsize */
107 FALSE, /* pc_relative */
108 0, /* bitpos */
109 complain_overflow_dont, /* complain_on_overflow */
110 bfd_elf_generic_reloc, /* special_function */
111 "R_TILEGX_32", /* name */
112 FALSE, /* partial_inplace */
113 0, /* src_mask */
114 0xffffffff, /* dst_mask */
115 FALSE), /* pcrel_offset */
116
117 /* A 16 bit absolute relocation. */
118 HOWTO (R_TILEGX_16, /* type */
119 0, /* rightshift */
120 1, /* size (0 = byte, 1 = short, 2 = long) */
121 16, /* bitsize */
122 FALSE, /* pc_relative */
123 0, /* bitpos */
124 complain_overflow_bitfield, /* complain_on_overflow */
125 bfd_elf_generic_reloc, /* special_function */
126 "R_TILEGX_16", /* name */
127 FALSE, /* partial_inplace */
128 0, /* src_mask */
129 0xffff, /* dst_mask */
130 FALSE), /* pcrel_offset */
131
132 /* An 8 bit absolute relocation. */
133 HOWTO (R_TILEGX_8, /* type */
134 0, /* rightshift */
135 0, /* size (0 = byte, 1 = short, 2 = long) */
136 8, /* bitsize */
137 FALSE, /* pc_relative */
138 0, /* bitpos */
139 complain_overflow_unsigned, /* complain_on_overflow */
140 bfd_elf_generic_reloc, /* special_function */
141 "R_TILEGX_8", /* name */
142 FALSE, /* partial_inplace */
143 0, /* src_mask */
144 0xff, /* dst_mask */
145 FALSE), /* pcrel_offset */
146 #ifdef BFD64
147 /* A 64 bit pc-relative relocation. */
148 HOWTO (R_TILEGX_64_PCREL,/* type */
149 0, /* rightshift */
150 4, /* size (0 = byte, 1 = short, 2 = long) */
151 64, /* bitsize */
152 TRUE, /* pc_relative */
153 0, /* bitpos */
154 complain_overflow_dont, /* complain_on_overflow */
155 bfd_elf_generic_reloc, /* special_function */
156 "R_TILEGX_32_PCREL", /* name */
157 FALSE, /* partial_inplace */
158 0, /* src_mask */
159 0xffffffffffffffffULL, /* dst_mask */
160 TRUE), /* pcrel_offset */
161 #endif
162 /* A 32 bit pc-relative relocation. */
163 HOWTO (R_TILEGX_32_PCREL,/* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 32, /* bitsize */
167 TRUE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_dont, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_TILEGX_32_PCREL", /* name */
172 FALSE, /* partial_inplace */
173 0, /* src_mask */
174 0xffffffff, /* dst_mask */
175 TRUE), /* pcrel_offset */
176
177 /* A 16 bit pc-relative relocation. */
178 HOWTO (R_TILEGX_16_PCREL,/* type */
179 0, /* rightshift */
180 1, /* size (0 = byte, 1 = short, 2 = long) */
181 16, /* bitsize */
182 TRUE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_signed, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_TILEGX_16_PCREL", /* name */
187 FALSE, /* partial_inplace */
188 0, /* src_mask */
189 0xffff, /* dst_mask */
190 TRUE), /* pcrel_offset */
191
192 /* An 8 bit pc-relative relocation. */
193 HOWTO (R_TILEGX_8_PCREL, /* type */
194 0, /* rightshift */
195 0, /* size (0 = byte, 1 = short, 2 = long) */
196 8, /* bitsize */
197 TRUE, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_signed, /* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_TILEGX_8_PCREL",/* name */
202 FALSE, /* partial_inplace */
203 0, /* src_mask */
204 0xff, /* dst_mask */
205 TRUE), /* pcrel_offset */
206
207 /* A 16 bit relocation without overflow. */
208 HOWTO (R_TILEGX_HW0, /* type */
209 0, /* rightshift */
210 1, /* size (0 = byte, 1 = short, 2 = long) */
211 16, /* bitsize */
212 FALSE, /* pc_relative */
213 0, /* bitpos */
214 complain_overflow_dont,/* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_TILEGX_HW0", /* name */
217 FALSE, /* partial_inplace */
218 0, /* src_mask */
219 0xffff, /* dst_mask */
220 FALSE), /* pcrel_offset */
221
222 /* A 16 bit relocation without overflow. */
223 HOWTO (R_TILEGX_HW1, /* type */
224 16, /* rightshift */
225 1, /* size (0 = byte, 1 = short, 2 = long) */
226 16, /* bitsize */
227 FALSE, /* pc_relative */
228 0, /* bitpos */
229 complain_overflow_dont,/* complain_on_overflow */
230 bfd_elf_generic_reloc, /* special_function */
231 "R_TILEGX_HW1", /* name */
232 FALSE, /* partial_inplace */
233 0, /* src_mask */
234 0xffff, /* dst_mask */
235 FALSE), /* pcrel_offset */
236
237 /* A 16 bit relocation without overflow. */
238 HOWTO (R_TILEGX_HW2, /* type */
239 32, /* rightshift */
240 1, /* size (0 = byte, 1 = short, 2 = long) */
241 16, /* bitsize */
242 FALSE, /* pc_relative */
243 0, /* bitpos */
244 complain_overflow_dont,/* complain_on_overflow */
245 bfd_elf_generic_reloc, /* special_function */
246 "R_TILEGX_HW2", /* name */
247 FALSE, /* partial_inplace */
248 0, /* src_mask */
249 0xffff, /* dst_mask */
250 FALSE), /* pcrel_offset */
251
252 /* A 16 bit relocation without overflow. */
253 HOWTO (R_TILEGX_HW3, /* type */
254 48, /* rightshift */
255 1, /* size (0 = byte, 1 = short, 2 = long) */
256 16, /* bitsize */
257 FALSE, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_dont,/* complain_on_overflow */
260 bfd_elf_generic_reloc, /* special_function */
261 "R_TILEGX_HW3", /* name */
262 FALSE, /* partial_inplace */
263 0, /* src_mask */
264 0xffff, /* dst_mask */
265 FALSE), /* pcrel_offset */
266
267 /* A 16 bit relocation with overflow. */
268 HOWTO (R_TILEGX_HW0_LAST, /* type */
269 0, /* rightshift */
270 1, /* size (0 = byte, 1 = short, 2 = long) */
271 16, /* bitsize */
272 FALSE, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_signed,/* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_TILEGX_HW0_LAST", /* name */
277 FALSE, /* partial_inplace */
278 0, /* src_mask */
279 0xffff, /* dst_mask */
280 FALSE), /* pcrel_offset */
281
282 /* A 16 bit relocation with overflow. */
283 HOWTO (R_TILEGX_HW1_LAST, /* type */
284 16, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_signed,/* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_TILEGX_HW1_LAST", /* name */
292 FALSE, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* A 16 bit relocation with overflow. */
298 HOWTO (R_TILEGX_HW2_LAST, /* type */
299 32, /* rightshift */
300 1, /* size (0 = byte, 1 = short, 2 = long) */
301 16, /* bitsize */
302 FALSE, /* pc_relative */
303 0, /* bitpos */
304 complain_overflow_signed,/* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_TILEGX_HW2_LAST", /* name */
307 FALSE, /* partial_inplace */
308 0, /* src_mask */
309 0xffff, /* dst_mask */
310 FALSE), /* pcrel_offset */
311
312 HOWTO (R_TILEGX_COPY, /* type */
313 0, /* rightshift */
314 0, /* size (0 = byte, 1 = short, 2 = long) */
315 0, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_dont, /* complain_on_overflow */
319 bfd_elf_generic_reloc, /* special_function */
320 "R_TILEGX_COPY", /* name */
321 FALSE, /* partial_inplace */
322 0, /* src_mask */
323 0, /* dst_mask */
324 TRUE), /* pcrel_offset */
325
326 HOWTO (R_TILEGX_GLOB_DAT, /* type */
327 0, /* rightshift */
328 0, /* size (0 = byte, 1 = short, 2 = long) */
329 0, /* bitsize */
330 FALSE, /* pc_relative */
331 0, /* bitpos */
332 complain_overflow_dont, /* complain_on_overflow */
333 bfd_elf_generic_reloc, /* special_function */
334 "R_TILEGX_GLOB_DAT", /* name */
335 FALSE, /* partial_inplace */
336 0, /* src_mask */
337 0, /* dst_mask */
338 TRUE), /* pcrel_offset */
339
340 HOWTO (R_TILEGX_JMP_SLOT, /* type */
341 0, /* rightshift */
342 0, /* size (0 = byte, 1 = short, 2 = long) */
343 0, /* bitsize */
344 FALSE, /* pc_relative */
345 0, /* bitpos */
346 complain_overflow_dont, /* complain_on_overflow */
347 bfd_elf_generic_reloc, /* special_function */
348 "R_TILEGX_JMP_SLOT", /* name */
349 FALSE, /* partial_inplace */
350 0, /* src_mask */
351 0, /* dst_mask */
352 TRUE), /* pcrel_offset */
353
354 HOWTO (R_TILEGX_RELATIVE, /* type */
355 0, /* rightshift */
356 0, /* size (0 = byte, 1 = short, 2 = long) */
357 0, /* bitsize */
358 FALSE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_dont, /* complain_on_overflow */
361 bfd_elf_generic_reloc, /* special_function */
362 "R_TILEGX_RELATIVE", /* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0, /* dst_mask */
366 TRUE), /* pcrel_offset */
367
368 HOWTO (R_TILEGX_BROFF_X1, /* type */
369 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */
370 2, /* size (0 = byte, 1 = short, 2 = long) */
371 17, /* bitsize */
372 TRUE, /* pc_relative */
373 0, /* bitpos */
374 complain_overflow_signed, /* complain_on_overflow */
375 bfd_elf_generic_reloc, /* special_function */
376 "R_TILEGX_BROFF_X1", /* name */
377 FALSE, /* partial_inplace */
378 0, /* src_mask */
379 -1, /* dst_mask */
380 TRUE), /* pcrel_offset */
381
382 HOWTO (R_TILEGX_JUMPOFF_X1, /* type */
383 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 27, /* bitsize */
386 TRUE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed,/* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_TILEGX_JUMPOFF_X1", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 -1, /* dst_mask */
394 TRUE), /* pcrel_offset */
395
396 HOWTO (R_TILEGX_JUMPOFF_X1_PLT, /* type */
397 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */
398 2, /* size (0 = byte, 1 = short, 2 = long) */
399 27, /* bitsize */
400 TRUE, /* pc_relative */
401 0, /* bitpos */
402 complain_overflow_signed,/* complain_on_overflow */
403 bfd_elf_generic_reloc, /* special_function */
404 "R_TILEGX_JUMPOFF_X1_PLT", /* name */
405 FALSE, /* partial_inplace */
406 0, /* src_mask */
407 -1, /* dst_mask */
408 TRUE), /* pcrel_offset */
409
410 #define TILEGX_IMM_HOWTO(name, size, bitsize) \
411 HOWTO (name, 0, size, bitsize, FALSE, 0, \
412 complain_overflow_signed, bfd_elf_generic_reloc, \
413 #name, FALSE, 0, -1, FALSE)
414
415 #define TILEGX_UIMM_HOWTO(name, size, bitsize) \
416 HOWTO (name, 0, size, bitsize, FALSE, 0, \
417 complain_overflow_unsigned, bfd_elf_generic_reloc, \
418 #name, FALSE, 0, -1, FALSE)
419
420 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X0, 0, 8),
421 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y0, 0, 8),
422 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X1, 0, 8),
423 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y1, 0, 8),
424 TILEGX_IMM_HOWTO(R_TILEGX_DEST_IMM8_X1, 0, 8),
425
426 TILEGX_UIMM_HOWTO(R_TILEGX_MT_IMM14_X1, 1, 14),
427 TILEGX_UIMM_HOWTO(R_TILEGX_MF_IMM14_X1, 1, 14),
428
429 TILEGX_UIMM_HOWTO(R_TILEGX_MMSTART_X0, 0, 6),
430 TILEGX_UIMM_HOWTO(R_TILEGX_MMEND_X0, 0, 6),
431
432 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_X0, 0, 6),
433 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_X1, 0, 6),
434 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_Y0, 0, 6),
435 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_Y1, 0, 6),
436
437 #define TILEGX_IMM16_HOWTO(name, rshift) \
438 HOWTO (name, rshift, 1, 16, FALSE, 0, \
439 complain_overflow_dont, bfd_elf_generic_reloc, \
440 #name, FALSE, 0, 0xffff, FALSE)
441
442 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0, 0),
443 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0, 0),
444 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW1, 16),
445 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW1, 16),
446 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW2, 32),
447 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW2, 32),
448 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW3, 48),
449 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW3, 48),
450
451 #define TILEGX_IMM16_HOWTO_LAST(name, rshift) \
452 HOWTO (name, rshift, 1, 16, FALSE, 0, \
453 complain_overflow_signed, bfd_elf_generic_reloc, \
454 #name, FALSE, 0, 0xffff, FALSE)
455
456 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST, 0),
457 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST, 0),
458 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST, 16),
459 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST, 16),
460 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW2_LAST, 32),
461 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW2_LAST, 32),
462
463 /* PC-relative offsets. */
464
465 #define TILEGX_IMM16_HOWTO_PCREL(name, rshift) \
466 HOWTO (name, rshift, 1, 16, TRUE, 0, \
467 complain_overflow_dont, bfd_elf_generic_reloc, \
468 #name, FALSE, 0, 0xffff, TRUE)
469
470 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW0_PCREL, 0),
471 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW0_PCREL, 0),
472 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW1_PCREL, 16),
473 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW1_PCREL, 16),
474 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW2_PCREL, 32),
475 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW2_PCREL, 32),
476 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW3_PCREL, 48),
477 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW3_PCREL, 48),
478
479 #define TILEGX_IMM16_HOWTO_LAST_PCREL(name, rshift) \
480 HOWTO (name, rshift, 1, 16, TRUE, 0, \
481 complain_overflow_signed, bfd_elf_generic_reloc, \
482 #name, FALSE, 0, 0xffff, TRUE)
483
484 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW0_LAST_PCREL, 0),
485 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW0_LAST_PCREL, 0),
486 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW1_LAST_PCREL, 16),
487 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW1_LAST_PCREL, 16),
488 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW2_LAST_PCREL, 32),
489 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW2_LAST_PCREL, 32),
490
491 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0_GOT, 0),
492 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0_GOT, 0),
493
494 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW0_PLT_PCREL, 0),
495 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW0_PLT_PCREL, 0),
496 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW1_PLT_PCREL, 16),
497 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW1_PLT_PCREL, 16),
498 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW2_PLT_PCREL, 32),
499 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW2_PLT_PCREL, 32),
500
501 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST_GOT, 0),
502 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST_GOT, 0),
503 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST_GOT, 16),
504 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST_GOT, 16),
505
506 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW3_PLT_PCREL, 48),
507 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW3_PLT_PCREL, 48),
508
509 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0_TLS_GD, 0),
510 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0_TLS_GD, 0),
511
512 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0_TLS_LE, 0),
513 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0_TLS_LE, 0),
514 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE, 0),
515 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE, 0),
516 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE, 16),
517 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE, 16),
518
519 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD, 0),
520 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD, 0),
521 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD, 16),
522 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD, 16),
523 EMPTY_HOWTO (90),
524 EMPTY_HOWTO (91),
525
526 #define TILEGX_IMM16_HOWTO_TLS_IE(name, rshift) \
527 HOWTO (name, rshift, 1, 16, FALSE, 0, \
528 complain_overflow_dont, bfd_elf_generic_reloc, \
529 #name, FALSE, 0, 0xffff, TRUE)
530
531 TILEGX_IMM16_HOWTO_TLS_IE (R_TILEGX_IMM16_X0_HW0_TLS_IE, 0),
532 TILEGX_IMM16_HOWTO_TLS_IE (R_TILEGX_IMM16_X1_HW0_TLS_IE, 0),
533
534 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL, 0),
535 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL, 0),
536 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL, 16),
537 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL, 16),
538 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL, 32),
539 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL, 32),
540
541 #define TILEGX_IMM16_HOWTO_LAST_TLS_IE(name, rshift) \
542 HOWTO (name, rshift, 1, 16, FALSE, 0, \
543 complain_overflow_signed, bfd_elf_generic_reloc, \
544 #name, FALSE, 0, 0xffff, TRUE)
545
546 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE, 0),
547 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE, 0),
548 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE, 16),
549 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE, 16),
550 EMPTY_HOWTO (104),
551 EMPTY_HOWTO (105),
552
553 HOWTO(R_TILEGX_TLS_DTPMOD64, 0, 0, 0, FALSE, 0, complain_overflow_dont,
554 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPMOD64",
555 FALSE, 0, 0, TRUE),
556 HOWTO(R_TILEGX_TLS_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
557 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPOFF64",
558 FALSE, 0, -1, TRUE),
559 HOWTO(R_TILEGX_TLS_TPOFF64, 0, 0, 0, FALSE, 0, complain_overflow_dont,
560 bfd_elf_generic_reloc, "R_TILEGX_TLS_TPOFF64",
561 FALSE, 0, 0, TRUE),
562
563 HOWTO(R_TILEGX_TLS_DTPMOD32, 0, 0, 0, FALSE, 0, complain_overflow_dont,
564 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPMOD32",
565 FALSE, 0, 0, TRUE),
566 HOWTO(R_TILEGX_TLS_DTPOFF32, 0, 4, 32, FALSE, 0, complain_overflow_bitfield,
567 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPOFF32",
568 FALSE, 0, -1, TRUE),
569 HOWTO(R_TILEGX_TLS_TPOFF32, 0, 0, 0, FALSE, 0, complain_overflow_dont,
570 bfd_elf_generic_reloc, "R_TILEGX_TLS_TPOFF32",
571 FALSE, 0, 0, TRUE),
572
573 HOWTO (R_TILEGX_TLS_GD_CALL, /* type */
574 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 27, /* bitsize */
577 TRUE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_signed,/* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_TILEGX_TLS_GD_CALL", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 -1, /* dst_mask */
585 TRUE), /* pcrel_offset */
586
587 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X0_TLS_GD_ADD, 0, 8),
588 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X1_TLS_GD_ADD, 0, 8),
589 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y0_TLS_GD_ADD, 0, 8),
590 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y1_TLS_GD_ADD, 0, 8),
591 TILEGX_IMM_HOWTO(R_TILEGX_TLS_IE_LOAD, 0, 8),
592 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X0_TLS_ADD, 0, 8),
593 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X1_TLS_ADD, 0, 8),
594 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y0_TLS_ADD, 0, 8),
595 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y1_TLS_ADD, 0, 8),
596 };
597
598 static reloc_howto_type tilegx_elf_howto_table2 [] =
599 {
600 /* GNU extension to record C++ vtable hierarchy */
601 HOWTO (R_TILEGX_GNU_VTINHERIT, /* type */
602 0, /* rightshift */
603 4, /* size (0 = byte, 1 = short, 2 = long) */
604 0, /* bitsize */
605 FALSE, /* pc_relative */
606 0, /* bitpos */
607 complain_overflow_dont, /* complain_on_overflow */
608 NULL, /* special_function */
609 "R_TILEGX_GNU_VTINHERIT", /* name */
610 FALSE, /* partial_inplace */
611 0, /* src_mask */
612 0, /* dst_mask */
613 FALSE), /* pcrel_offset */
614
615 /* GNU extension to record C++ vtable member usage */
616 HOWTO (R_TILEGX_GNU_VTENTRY, /* type */
617 0, /* rightshift */
618 4, /* size (0 = byte, 1 = short, 2 = long) */
619 0, /* bitsize */
620 FALSE, /* pc_relative */
621 0, /* bitpos */
622 complain_overflow_dont, /* complain_on_overflow */
623 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
624 "R_TILEGX_GNU_VTENTRY", /* name */
625 FALSE, /* partial_inplace */
626 0, /* src_mask */
627 0, /* dst_mask */
628 FALSE), /* pcrel_offset */
629
630 };
631
632 /* Map BFD reloc types to TILEGX ELF reloc types. */
633
634 typedef struct tilegx_reloc_map
635 {
636 bfd_reloc_code_real_type bfd_reloc_val;
637 unsigned int tilegx_reloc_val;
638 reloc_howto_type * table;
639 } reloc_map;
640
641 static const reloc_map tilegx_reloc_map [] =
642 {
643 #define TH_REMAP(bfd, tilegx) \
644 { bfd, tilegx, tilegx_elf_howto_table },
645
646 /* Standard relocations. */
647 TH_REMAP (BFD_RELOC_NONE, R_TILEGX_NONE)
648 TH_REMAP (BFD_RELOC_64, R_TILEGX_64)
649 TH_REMAP (BFD_RELOC_32, R_TILEGX_32)
650 TH_REMAP (BFD_RELOC_16, R_TILEGX_16)
651 TH_REMAP (BFD_RELOC_8, R_TILEGX_8)
652 TH_REMAP (BFD_RELOC_64_PCREL, R_TILEGX_64_PCREL)
653 TH_REMAP (BFD_RELOC_32_PCREL, R_TILEGX_32_PCREL)
654 TH_REMAP (BFD_RELOC_16_PCREL, R_TILEGX_16_PCREL)
655 TH_REMAP (BFD_RELOC_8_PCREL, R_TILEGX_8_PCREL)
656
657 #define SIMPLE_REMAP(t) TH_REMAP (BFD_RELOC_##t, R_##t)
658
659 /* Custom relocations. */
660 SIMPLE_REMAP (TILEGX_HW0)
661 SIMPLE_REMAP (TILEGX_HW1)
662 SIMPLE_REMAP (TILEGX_HW2)
663 SIMPLE_REMAP (TILEGX_HW3)
664 SIMPLE_REMAP (TILEGX_HW0_LAST)
665 SIMPLE_REMAP (TILEGX_HW1_LAST)
666 SIMPLE_REMAP (TILEGX_HW2_LAST)
667 SIMPLE_REMAP (TILEGX_COPY)
668 SIMPLE_REMAP (TILEGX_GLOB_DAT)
669 SIMPLE_REMAP (TILEGX_JMP_SLOT)
670 SIMPLE_REMAP (TILEGX_RELATIVE)
671 SIMPLE_REMAP (TILEGX_BROFF_X1)
672 SIMPLE_REMAP (TILEGX_JUMPOFF_X1)
673 SIMPLE_REMAP (TILEGX_JUMPOFF_X1_PLT)
674 SIMPLE_REMAP (TILEGX_IMM8_X0)
675 SIMPLE_REMAP (TILEGX_IMM8_Y0)
676 SIMPLE_REMAP (TILEGX_IMM8_X1)
677 SIMPLE_REMAP (TILEGX_IMM8_Y1)
678 SIMPLE_REMAP (TILEGX_DEST_IMM8_X1)
679 SIMPLE_REMAP (TILEGX_MT_IMM14_X1)
680 SIMPLE_REMAP (TILEGX_MF_IMM14_X1)
681 SIMPLE_REMAP (TILEGX_MMSTART_X0)
682 SIMPLE_REMAP (TILEGX_MMEND_X0)
683 SIMPLE_REMAP (TILEGX_SHAMT_X0)
684 SIMPLE_REMAP (TILEGX_SHAMT_X1)
685 SIMPLE_REMAP (TILEGX_SHAMT_Y0)
686 SIMPLE_REMAP (TILEGX_SHAMT_Y1)
687 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0)
688 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0)
689 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1)
690 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1)
691 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2)
692 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2)
693 SIMPLE_REMAP (TILEGX_IMM16_X0_HW3)
694 SIMPLE_REMAP (TILEGX_IMM16_X1_HW3)
695 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST)
696 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST)
697 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST)
698 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST)
699 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_LAST)
700 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST)
701 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_PCREL)
702 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_PCREL)
703 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_PCREL)
704 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_PCREL)
705 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_PCREL)
706 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_PCREL)
707 SIMPLE_REMAP (TILEGX_IMM16_X0_HW3_PCREL)
708 SIMPLE_REMAP (TILEGX_IMM16_X1_HW3_PCREL)
709 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_PCREL)
710 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_PCREL)
711 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_PCREL)
712 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_PCREL)
713 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_LAST_PCREL)
714 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST_PCREL)
715 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_GOT)
716 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_GOT)
717 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_PLT_PCREL)
718 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_PLT_PCREL)
719 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_PLT_PCREL)
720 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_PLT_PCREL)
721 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_PLT_PCREL)
722 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_PLT_PCREL)
723 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_GOT)
724 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_GOT)
725 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_GOT)
726 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_GOT)
727 SIMPLE_REMAP (TILEGX_IMM16_X0_HW3_PLT_PCREL)
728 SIMPLE_REMAP (TILEGX_IMM16_X1_HW3_PLT_PCREL)
729 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_GD)
730 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_GD)
731 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_LE)
732 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_LE)
733 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_LE)
734 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_LE)
735 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_LE)
736 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_LE)
737 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_GD)
738 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_GD)
739 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_GD)
740 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_GD)
741 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_IE)
742 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_IE)
743 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL)
744 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL)
745 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL)
746 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL)
747 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL)
748 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL)
749 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_IE)
750 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_IE)
751 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_IE)
752 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_IE)
753
754 SIMPLE_REMAP (TILEGX_TLS_DTPMOD64)
755 SIMPLE_REMAP (TILEGX_TLS_DTPOFF64)
756 SIMPLE_REMAP (TILEGX_TLS_TPOFF64)
757
758 SIMPLE_REMAP (TILEGX_TLS_DTPMOD32)
759 SIMPLE_REMAP (TILEGX_TLS_DTPOFF32)
760 SIMPLE_REMAP (TILEGX_TLS_TPOFF32)
761
762 SIMPLE_REMAP (TILEGX_TLS_GD_CALL)
763 SIMPLE_REMAP (TILEGX_IMM8_X0_TLS_GD_ADD)
764 SIMPLE_REMAP (TILEGX_IMM8_X1_TLS_GD_ADD)
765 SIMPLE_REMAP (TILEGX_IMM8_Y0_TLS_GD_ADD)
766 SIMPLE_REMAP (TILEGX_IMM8_Y1_TLS_GD_ADD)
767 SIMPLE_REMAP (TILEGX_TLS_IE_LOAD)
768 SIMPLE_REMAP (TILEGX_IMM8_X0_TLS_ADD)
769 SIMPLE_REMAP (TILEGX_IMM8_X1_TLS_ADD)
770 SIMPLE_REMAP (TILEGX_IMM8_Y0_TLS_ADD)
771 SIMPLE_REMAP (TILEGX_IMM8_Y1_TLS_ADD)
772
773 #undef SIMPLE_REMAP
774 #undef TH_REMAP
775
776 { BFD_RELOC_VTABLE_INHERIT, R_TILEGX_GNU_VTINHERIT, tilegx_elf_howto_table2 },
777 { BFD_RELOC_VTABLE_ENTRY, R_TILEGX_GNU_VTENTRY, tilegx_elf_howto_table2 },
778 };
779
780
781
782 /* The TILE-Gx linker needs to keep track of the number of relocs that it
783 decides to copy as dynamic relocs in check_relocs for each symbol.
784 This is so that it can later discard them if they are found to be
785 unnecessary. We store the information in a field extending the
786 regular ELF linker hash table. */
787
788 struct tilegx_elf_dyn_relocs
789 {
790 struct tilegx_elf_dyn_relocs *next;
791
792 /* The input section of the reloc. */
793 asection *sec;
794
795 /* Total number of relocs copied for the input section. */
796 bfd_size_type count;
797
798 /* Number of pc-relative relocs copied for the input section. */
799 bfd_size_type pc_count;
800 };
801
802 /* TILEGX ELF linker hash entry. */
803
804 struct tilegx_elf_link_hash_entry
805 {
806 struct elf_link_hash_entry elf;
807
808 /* Track dynamic relocs copied for this symbol. */
809 struct tilegx_elf_dyn_relocs *dyn_relocs;
810
811 #define GOT_UNKNOWN 0
812 #define GOT_NORMAL 1
813 #define GOT_TLS_GD 2
814 #define GOT_TLS_IE 4
815 unsigned char tls_type;
816 };
817
818 #define tilegx_elf_hash_entry(ent) \
819 ((struct tilegx_elf_link_hash_entry *)(ent))
820
821 struct _bfd_tilegx_elf_obj_tdata
822 {
823 struct elf_obj_tdata root;
824
825 /* tls_type for each local got entry. */
826 char *local_got_tls_type;
827 };
828
829 #define _bfd_tilegx_elf_tdata(abfd) \
830 ((struct _bfd_tilegx_elf_obj_tdata *) (abfd)->tdata.any)
831
832 #define _bfd_tilegx_elf_local_got_tls_type(abfd) \
833 (_bfd_tilegx_elf_tdata (abfd)->local_got_tls_type)
834
835 #define is_tilegx_elf(bfd) \
836 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
837 && elf_tdata (bfd) != NULL \
838 && elf_object_id (bfd) == TILEGX_ELF_DATA)
839
840 #include "elf/common.h"
841 #include "elf/internal.h"
842
843 struct tilegx_elf_link_hash_table
844 {
845 struct elf_link_hash_table elf;
846
847 int bytes_per_word;
848 int word_align_power;
849 int bytes_per_rela;
850 int dtpmod_reloc;
851 int dtpoff_reloc;
852 int tpoff_reloc;
853 bfd_vma (*r_info) (Elf_Internal_Rela *, bfd_vma, bfd_vma);
854 bfd_vma (*r_symndx) (bfd_vma);
855 void (*put_word) (bfd *, bfd_vma, void *);
856 const char *dynamic_interpreter;
857
858 /* Short-cuts to get to dynamic linker sections. */
859 asection *sdynbss;
860 asection *srelbss;
861
862 /* Whether LE transition has been disabled for some of the
863 sections. */
864 bfd_boolean disable_le_transition;
865
866 /* Small local sym to section mapping cache. */
867 struct sym_cache sym_cache;
868 };
869
870
871 /* Get the Tile ELF linker hash table from a link_info structure. */
872 #define tilegx_elf_hash_table(p) \
873 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
874 == TILEGX_ELF_DATA ? ((struct tilegx_elf_link_hash_table *) ((p)->hash)) : NULL)
875
876 #ifdef BFD64
877 static bfd_vma
tilegx_elf_r_info_64(Elf_Internal_Rela * in_rel ATTRIBUTE_UNUSED,bfd_vma rel_index,bfd_vma type)878 tilegx_elf_r_info_64 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED,
879 bfd_vma rel_index,
880 bfd_vma type)
881 {
882 return ELF64_R_INFO (rel_index, type);
883 }
884
885 static bfd_vma
tilegx_elf_r_symndx_64(bfd_vma r_info)886 tilegx_elf_r_symndx_64 (bfd_vma r_info)
887 {
888 return ELF64_R_SYM (r_info);
889 }
890
891 static void
tilegx_put_word_64(bfd * abfd,bfd_vma val,void * ptr)892 tilegx_put_word_64 (bfd *abfd, bfd_vma val, void *ptr)
893 {
894 bfd_put_64 (abfd, val, ptr);
895 }
896 #endif /* BFD64 */
897
898 static bfd_vma
tilegx_elf_r_info_32(Elf_Internal_Rela * in_rel ATTRIBUTE_UNUSED,bfd_vma rel_index,bfd_vma type)899 tilegx_elf_r_info_32 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED,
900 bfd_vma rel_index,
901 bfd_vma type)
902 {
903 return ELF32_R_INFO (rel_index, type);
904 }
905
906 static bfd_vma
tilegx_elf_r_symndx_32(bfd_vma r_info)907 tilegx_elf_r_symndx_32 (bfd_vma r_info)
908 {
909 return ELF32_R_SYM (r_info);
910 }
911
912 static void
tilegx_put_word_32(bfd * abfd,bfd_vma val,void * ptr)913 tilegx_put_word_32 (bfd *abfd, bfd_vma val, void *ptr)
914 {
915 bfd_put_32 (abfd, val, ptr);
916 }
917
918 reloc_howto_type *
tilegx_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)919 tilegx_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
920 bfd_reloc_code_real_type code)
921 {
922 unsigned int i;
923
924 for (i = ARRAY_SIZE (tilegx_reloc_map); i--;)
925 {
926 const reloc_map * entry;
927
928 entry = tilegx_reloc_map + i;
929
930 if (entry->bfd_reloc_val == code)
931 return entry->table + (entry->tilegx_reloc_val
932 - entry->table[0].type);
933 }
934
935 return NULL;
936 }
937
938 reloc_howto_type *
tilegx_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)939 tilegx_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
940 const char *r_name)
941 {
942 unsigned int i;
943
944 for (i = 0;
945 i < (sizeof (tilegx_elf_howto_table)
946 / sizeof (tilegx_elf_howto_table[0]));
947 i++)
948 if (tilegx_elf_howto_table[i].name != NULL
949 && strcasecmp (tilegx_elf_howto_table[i].name, r_name) == 0)
950 return &tilegx_elf_howto_table[i];
951
952 return NULL;
953 }
954
955 void
tilegx_info_to_howto_rela(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)956 tilegx_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
957 arelent *cache_ptr,
958 Elf_Internal_Rela *dst)
959 {
960 unsigned int r_type = TILEGX_ELF_R_TYPE (dst->r_info);
961
962 if (r_type <= (unsigned int) R_TILEGX_IMM8_Y1_TLS_ADD)
963 cache_ptr->howto = &tilegx_elf_howto_table [r_type];
964 else if (r_type - R_TILEGX_GNU_VTINHERIT
965 <= (unsigned int) R_TILEGX_GNU_VTENTRY)
966 cache_ptr->howto
967 = &tilegx_elf_howto_table2 [r_type - R_TILEGX_GNU_VTINHERIT];
968 else
969 abort ();
970 }
971
972 typedef tilegx_bundle_bits (*tilegx_create_func)(int);
973
974 static const tilegx_create_func reloc_to_create_func[] =
975 {
976 /* The first twenty relocation types don't correspond to operands */
977 NULL,
978 NULL,
979 NULL,
980 NULL,
981 NULL,
982 NULL,
983 NULL,
984 NULL,
985 NULL,
986 NULL,
987 NULL,
988 NULL,
989 NULL,
990 NULL,
991 NULL,
992 NULL,
993 NULL,
994 NULL,
995 NULL,
996 NULL,
997
998 /* The remaining relocations are used for immediate operands */
999 create_BrOff_X1,
1000 create_JumpOff_X1,
1001 create_JumpOff_X1,
1002 create_Imm8_X0,
1003 create_Imm8_Y0,
1004 create_Imm8_X1,
1005 create_Imm8_Y1,
1006 create_Dest_Imm8_X1,
1007 create_MT_Imm14_X1,
1008 create_MF_Imm14_X1,
1009 create_BFStart_X0,
1010 create_BFEnd_X0,
1011 create_ShAmt_X0,
1012 create_ShAmt_X1,
1013 create_ShAmt_Y0,
1014 create_ShAmt_Y1,
1015 create_Imm16_X0,
1016 create_Imm16_X1,
1017 create_Imm16_X0,
1018 create_Imm16_X1,
1019 create_Imm16_X0,
1020 create_Imm16_X1,
1021 create_Imm16_X0,
1022 create_Imm16_X1,
1023 create_Imm16_X0,
1024 create_Imm16_X1,
1025 create_Imm16_X0,
1026 create_Imm16_X1,
1027 create_Imm16_X0,
1028 create_Imm16_X1,
1029 create_Imm16_X0,
1030 create_Imm16_X1,
1031 create_Imm16_X0,
1032 create_Imm16_X1,
1033 create_Imm16_X0,
1034 create_Imm16_X1,
1035 create_Imm16_X0,
1036 create_Imm16_X1,
1037 create_Imm16_X0,
1038 create_Imm16_X1,
1039 create_Imm16_X0,
1040 create_Imm16_X1,
1041 create_Imm16_X0,
1042 create_Imm16_X1,
1043 create_Imm16_X0,
1044 create_Imm16_X1,
1045 create_Imm16_X0,
1046 create_Imm16_X1,
1047 create_Imm16_X0,
1048 create_Imm16_X1,
1049 create_Imm16_X0,
1050 create_Imm16_X1,
1051 create_Imm16_X0,
1052 create_Imm16_X1,
1053 create_Imm16_X0,
1054 create_Imm16_X1,
1055 create_Imm16_X0,
1056 create_Imm16_X1,
1057 create_Imm16_X0,
1058 create_Imm16_X1,
1059 create_Imm16_X0,
1060 create_Imm16_X1,
1061 create_Imm16_X0,
1062 create_Imm16_X1,
1063 create_Imm16_X0,
1064 create_Imm16_X1,
1065 create_Imm16_X0,
1066 create_Imm16_X1,
1067 create_Imm16_X0,
1068 create_Imm16_X1,
1069 NULL,
1070 NULL,
1071 create_Imm16_X0,
1072 create_Imm16_X1,
1073 create_Imm16_X0,
1074 create_Imm16_X1,
1075 create_Imm16_X0,
1076 create_Imm16_X1,
1077 create_Imm16_X0,
1078 create_Imm16_X1,
1079 create_Imm16_X0,
1080 create_Imm16_X1,
1081 create_Imm16_X0,
1082 create_Imm16_X1,
1083 };
1084
1085 static void
tilegx_elf_append_rela(bfd * abfd,asection * s,Elf_Internal_Rela * rel)1086 tilegx_elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel)
1087 {
1088 const struct elf_backend_data *bed;
1089 bfd_byte *loc;
1090
1091 bed = get_elf_backend_data (abfd);
1092 loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela);
1093 bed->s->swap_reloca_out (abfd, rel, loc);
1094 }
1095
1096 /* PLT/GOT stuff */
1097
1098 /* The procedure linkage table starts with the following header:
1099
1100 ld_add r28, r27, 8
1101 ld r27, r27
1102 {
1103 jr r27
1104 info 10 ## SP not offset, return PC in LR
1105 }
1106
1107 Subsequent entries are the following, jumping to the header at the end:
1108
1109 {
1110 moveli r28, <_GLOBAL_OFFSET_TABLE_ - 1f + MY_GOT_OFFSET>
1111 lnk r26
1112 }
1113 1:
1114 {
1115 moveli r27, <_GLOBAL_OFFSET_TABLE_ - 1b>
1116 shl16insli r28, r28, <_GLOBAL_OFFSET_TABLE_ - 1b + MY_GOT_OFFSET>
1117 }
1118 {
1119 add r28, r26, r28
1120 shl16insli r27, r27, <_GLOBAL_OFFSET_TABLE_ - 1b>
1121 }
1122 {
1123 add r27, r26, r27
1124 ld r28, r28
1125 info 10 ## SP not offset, return PC in LR
1126 }
1127 {
1128 shl16insli r29, zero, MY_PLT_INDEX
1129 jr r28
1130 }
1131
1132 This code sequence lets the code at at the start of the PLT determine
1133 which PLT entry was executed by examining 'r29'.
1134
1135 Note that MY_PLT_INDEX skips over the header entries, so the first
1136 actual jump table entry has index zero.
1137
1138 If the offset fits in 16 bits,
1139
1140 lnk r26
1141 1:
1142 {
1143 addli r28, r26, <_GLOBAL_OFFSET_TABLE_ - 1b + MY_GOT_OFFSET>
1144 moveli r27, <_GLOBAL_OFFSET_TABLE_ - 1b>
1145 }
1146 {
1147 shl16insli r29, zero, MY_PLT_INDEX
1148 ld r28, r28
1149 }
1150 {
1151 add r27, r26, r27
1152 jr r28
1153 }
1154 info 10 ## SP not offset, return PC in LR
1155
1156 For the purpose of backtracing, the procedure linkage table ends with the
1157 following tail entry:
1158
1159 info 10 ## SP not offset, return PC in LR
1160
1161 The 32-bit versions are similar, with ld4s replacing ld, and offsets into
1162 the GOT being multiples of 4 instead of 8.
1163
1164 */
1165
1166 #define PLT_HEADER_SIZE_IN_BUNDLES 3
1167 #define PLT_ENTRY_SIZE_IN_BUNDLES 5
1168 #define PLT_TAIL_SIZE_IN_BUNDLES 1
1169
1170 #define PLT_HEADER_SIZE \
1171 (PLT_HEADER_SIZE_IN_BUNDLES * TILEGX_BUNDLE_SIZE_IN_BYTES)
1172 #define PLT_ENTRY_SIZE \
1173 (PLT_ENTRY_SIZE_IN_BUNDLES * TILEGX_BUNDLE_SIZE_IN_BYTES)
1174 #define PLT_TAIL_SIZE \
1175 (PLT_TAIL_SIZE_IN_BUNDLES * TILEGX_BUNDLE_SIZE_IN_BYTES)
1176
1177 #define GOT_ENTRY_SIZE(htab) TILEGX_ELF_WORD_BYTES (htab)
1178
1179 #define GOTPLT_HEADER_SIZE(htab) (2 * GOT_ENTRY_SIZE (htab))
1180
1181 static const bfd_byte
1182 tilegx64_plt0_entry[PLT_HEADER_SIZE] =
1183 {
1184 0x00, 0x30, 0x48, 0x51,
1185 0x6e, 0x43, 0xa0, 0x18, /* { ld_add r28, r27, 8 } */
1186 0x00, 0x30, 0xbc, 0x35,
1187 0x00, 0x40, 0xde, 0x9e, /* { ld r27, r27 } */
1188 0xff, 0xaf, 0x30, 0x40,
1189 0x60, 0x73, 0x6a, 0x28, /* { info 10 ; jr r27 } */
1190 };
1191
1192 static const bfd_byte
1193 tilegx64_long_plt_entry[PLT_ENTRY_SIZE] =
1194 {
1195 0xdc, 0x0f, 0x00, 0x10,
1196 0x0d, 0xf0, 0x6a, 0x28, /* { moveli r28, 0 ; lnk r26 } */
1197 0xdb, 0x0f, 0x00, 0x10,
1198 0x8e, 0x03, 0x00, 0x38, /* { moveli r27, 0 ; shl16insli r28, r28, 0 } */
1199 0x9c, 0xc6, 0x0d, 0xd0,
1200 0x6d, 0x03, 0x00, 0x38, /* { add r28, r26, r28 ; shl16insli r27, r27, 0 } */
1201 0x9b, 0xb6, 0xc5, 0xad,
1202 0xff, 0x57, 0xe0, 0x8e, /* { add r27, r26, r27 ; info 10 ; ld r28, r28 } */
1203 0xdd, 0x0f, 0x00, 0x70,
1204 0x80, 0x73, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; jr r28 } */
1205 };
1206
1207 static const bfd_byte
1208 tilegx64_short_plt_entry[PLT_ENTRY_SIZE] =
1209 {
1210 0x00, 0x30, 0x48, 0x51,
1211 0x0d, 0xf0, 0x6a, 0x28, /* { lnk r26 } */
1212 0x9c, 0x06, 0x00, 0x90,
1213 0xed, 0x07, 0x00, 0x00, /* { addli r28, r26, 0 ; moveli r27, 0 } */
1214 0xdd, 0x0f, 0x00, 0x70,
1215 0x8e, 0xeb, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; ld r28, r28 } */
1216 0x9b, 0xb6, 0x0d, 0x50,
1217 0x80, 0x73, 0x6a, 0x28, /* { add r27, r26, r27 ; jr r28 } */
1218 0x00, 0x30, 0x48, 0xd1,
1219 0xff, 0x57, 0x18, 0x18, /* { info 10 } */
1220 };
1221
1222 /* Reuse an existing info 10 bundle. */
1223 static const bfd_byte *const tilegx64_plt_tail_entry =
1224 &tilegx64_short_plt_entry[4 * TILEGX_BUNDLE_SIZE_IN_BYTES];
1225
1226 static const bfd_byte
1227 tilegx32_plt0_entry[PLT_HEADER_SIZE] =
1228 {
1229 0x00, 0x30, 0x48, 0x51,
1230 0x6e, 0x23, 0x58, 0x18, /* { ld4s_add r28, r27, 4 } */
1231 0x00, 0x30, 0xbc, 0x35,
1232 0x00, 0x40, 0xde, 0x9c, /* { ld4s r27, r27 } */
1233 0xff, 0xaf, 0x30, 0x40,
1234 0x60, 0x73, 0x6a, 0x28, /* { info 10 ; jr r27 } */
1235 };
1236
1237 static const bfd_byte
1238 tilegx32_long_plt_entry[PLT_ENTRY_SIZE] =
1239 {
1240 0xdc, 0x0f, 0x00, 0x10,
1241 0x0d, 0xf0, 0x6a, 0x28, /* { moveli r28, 0 ; lnk r26 } */
1242 0xdb, 0x0f, 0x00, 0x10,
1243 0x8e, 0x03, 0x00, 0x38, /* { moveli r27, 0 ; shl16insli r28, r28, 0 } */
1244 0x9c, 0xc6, 0x0d, 0xd0,
1245 0x6d, 0x03, 0x00, 0x38, /* { add r28, r26, r28 ; shl16insli r27, r27, 0 } */
1246 0x9b, 0xb6, 0xc5, 0xad,
1247 0xff, 0x57, 0xe0, 0x8c, /* { add r27, r26, r27 ; info 10 ; ld4s r28, r28 } */
1248 0xdd, 0x0f, 0x00, 0x70,
1249 0x80, 0x73, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; jr r28 } */
1250 };
1251
1252 static const bfd_byte
1253 tilegx32_short_plt_entry[PLT_ENTRY_SIZE] =
1254 {
1255 0x00, 0x30, 0x48, 0x51,
1256 0x0d, 0xf0, 0x6a, 0x28, /* { lnk r26 } */
1257 0x9c, 0x06, 0x00, 0x90,
1258 0xed, 0x07, 0x00, 0x00, /* { addli r28, r26, 0 ; moveli r27, 0 } */
1259 0xdd, 0x0f, 0x00, 0x70,
1260 0x8e, 0x9b, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; ld4s r28, r28 } */
1261 0x9b, 0xb6, 0x0d, 0x50,
1262 0x80, 0x73, 0x6a, 0x28, /* { add r27, r26, r27 ; jr r28 } */
1263 0x00, 0x30, 0x48, 0xd1,
1264 0xff, 0x57, 0x18, 0x18, /* { info 10 } */
1265 };
1266
1267 /* Reuse an existing info 10 bundle. */
1268 static const bfd_byte *const tilegx32_plt_tail_entry =
1269 &tilegx64_short_plt_entry[4 * TILEGX_BUNDLE_SIZE_IN_BYTES];
1270
1271 static int
tilegx_plt_entry_build(bfd * output_bfd,struct tilegx_elf_link_hash_table * htab,asection * splt,asection * sgotplt,bfd_vma offset,bfd_vma * r_offset)1272 tilegx_plt_entry_build (bfd *output_bfd,
1273 struct tilegx_elf_link_hash_table *htab,
1274 asection *splt, asection *sgotplt,
1275 bfd_vma offset, bfd_vma *r_offset)
1276 {
1277 int plt_index = (offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
1278 int got_offset = (plt_index * GOT_ENTRY_SIZE (htab)
1279 + GOTPLT_HEADER_SIZE (htab));
1280 tilegx_bundle_bits *pc;
1281
1282 /* Compute the distance from the got entry to the lnk. */
1283 bfd_signed_vma dist_got_entry = sgotplt->output_section->vma
1284 + sgotplt->output_offset
1285 + got_offset
1286 - splt->output_section->vma
1287 - splt->output_offset
1288 - offset
1289 - TILEGX_BUNDLE_SIZE_IN_BYTES;
1290
1291 /* Compute the distance to GOTPLT[0]. */
1292 bfd_signed_vma dist_got0 = dist_got_entry - got_offset;
1293
1294 /* Check whether we can use the short plt entry with 16-bit offset. */
1295 bfd_boolean short_plt_entry =
1296 (dist_got_entry <= 0x7fff && dist_got0 >= -0x8000);
1297
1298 const tilegx_bundle_bits *plt_entry = (tilegx_bundle_bits *)
1299 (ABI_64_P (output_bfd) ?
1300 (short_plt_entry ? tilegx64_short_plt_entry : tilegx64_long_plt_entry) :
1301 (short_plt_entry ? tilegx32_short_plt_entry : tilegx32_long_plt_entry));
1302
1303 /* Copy the plt entry template. */
1304 memcpy (splt->contents + offset, plt_entry, PLT_ENTRY_SIZE);
1305
1306 /* Write the immediate offsets. */
1307 pc = (tilegx_bundle_bits *)(splt->contents + offset);
1308
1309 if (short_plt_entry)
1310 {
1311 /* { lnk r28 } */
1312 pc++;
1313
1314 /* { addli r28, r28, &GOTPLT[MY_GOT_INDEX] ; moveli r27, &GOTPLT[0] } */
1315 *pc++ |= create_Imm16_X0 (dist_got_entry)
1316 | create_Imm16_X1 (dist_got0);
1317
1318 /* { shl16insli r29, zero, MY_PLT_INDEX ; ld r28, r28 } */
1319 *pc++ |= create_Imm16_X0 (plt_index);
1320 }
1321 else
1322 {
1323 /* { moveli r28, &GOTPLT[MY_GOT_INDEX] ; lnk r26 } */
1324 *pc++ |= create_Imm16_X0 (dist_got_entry >> 16);
1325
1326 /* { moveli r27, &GOTPLT[0] ;
1327 shl16insli r28, r28, &GOTPLT[MY_GOT_INDEX] } */
1328 *pc++ |= create_Imm16_X0 (dist_got0 >> 16)
1329 | create_Imm16_X1 (dist_got_entry);
1330
1331 /* { add r28, r26, r28 ; shl16insli r27, r27, &GOTPLT[0] } */
1332 *pc++ |= create_Imm16_X1 (dist_got0);
1333
1334 /* { add r27, r26, r27 ; info 10 ; ld r28, r28 } */
1335 pc++;
1336
1337 /* { shl16insli r29, zero, MY_GOT_INDEX ; jr r28 } */
1338 *pc++ |= create_Imm16_X0 (plt_index);
1339 }
1340
1341 /* Set the relocation offset. */
1342 *r_offset = got_offset;
1343
1344 return plt_index;
1345 }
1346
1347 /* Create an entry in an TILEGX ELF linker hash table. */
1348
1349 static struct bfd_hash_entry *
link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)1350 link_hash_newfunc (struct bfd_hash_entry *entry,
1351 struct bfd_hash_table *table, const char *string)
1352 {
1353 /* Allocate the structure if it has not already been allocated by a
1354 subclass. */
1355 if (entry == NULL)
1356 {
1357 entry =
1358 bfd_hash_allocate (table,
1359 sizeof (struct tilegx_elf_link_hash_entry));
1360 if (entry == NULL)
1361 return entry;
1362 }
1363
1364 /* Call the allocation method of the superclass. */
1365 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1366 if (entry != NULL)
1367 {
1368 struct tilegx_elf_link_hash_entry *eh;
1369
1370 eh = (struct tilegx_elf_link_hash_entry *) entry;
1371 eh->dyn_relocs = NULL;
1372 eh->tls_type = GOT_UNKNOWN;
1373 }
1374
1375 return entry;
1376 }
1377
1378 /* Create a TILEGX ELF linker hash table. */
1379
1380 struct bfd_link_hash_table *
tilegx_elf_link_hash_table_create(bfd * abfd)1381 tilegx_elf_link_hash_table_create (bfd *abfd)
1382 {
1383 struct tilegx_elf_link_hash_table *ret;
1384 bfd_size_type amt = sizeof (struct tilegx_elf_link_hash_table);
1385
1386 ret = (struct tilegx_elf_link_hash_table *) bfd_zmalloc (amt);
1387 if (ret == NULL)
1388 return NULL;
1389
1390 #ifdef BFD64
1391 if (ABI_64_P (abfd))
1392 {
1393 ret->bytes_per_word = 8;
1394 ret->word_align_power = 3;
1395 ret->bytes_per_rela = sizeof (Elf64_External_Rela);
1396 ret->dtpoff_reloc = R_TILEGX_TLS_DTPOFF64;
1397 ret->dtpmod_reloc = R_TILEGX_TLS_DTPMOD64;
1398 ret->tpoff_reloc = R_TILEGX_TLS_TPOFF64;
1399 ret->r_info = tilegx_elf_r_info_64;
1400 ret->r_symndx = tilegx_elf_r_symndx_64;
1401 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
1402 ret->put_word = tilegx_put_word_64;
1403 }
1404 else
1405 #endif
1406 {
1407 ret->bytes_per_word = 4;
1408 ret->word_align_power = 2;
1409 ret->bytes_per_rela = sizeof (Elf32_External_Rela);
1410 ret->dtpoff_reloc = R_TILEGX_TLS_DTPOFF32;
1411 ret->dtpmod_reloc = R_TILEGX_TLS_DTPMOD32;
1412 ret->tpoff_reloc = R_TILEGX_TLS_TPOFF32;
1413 ret->r_info = tilegx_elf_r_info_32;
1414 ret->r_symndx = tilegx_elf_r_symndx_32;
1415 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
1416 ret->put_word = tilegx_put_word_32;
1417 }
1418
1419 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
1420 sizeof (struct tilegx_elf_link_hash_entry),
1421 TILEGX_ELF_DATA))
1422 {
1423 free (ret);
1424 return NULL;
1425 }
1426
1427 return &ret->elf.root;
1428 }
1429
1430 /* Create the .got section. */
1431
1432 static bfd_boolean
tilegx_elf_create_got_section(bfd * abfd,struct bfd_link_info * info)1433 tilegx_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
1434 {
1435 flagword flags;
1436 asection *s, *s_got;
1437 struct elf_link_hash_entry *h;
1438 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1439 struct elf_link_hash_table *htab = elf_hash_table (info);
1440
1441 /* This function may be called more than once. */
1442 s = bfd_get_linker_section (abfd, ".got");
1443 if (s != NULL)
1444 return TRUE;
1445
1446 flags = bed->dynamic_sec_flags;
1447
1448 s = bfd_make_section_anyway_with_flags (abfd,
1449 (bed->rela_plts_and_copies_p
1450 ? ".rela.got" : ".rel.got"),
1451 (bed->dynamic_sec_flags
1452 | SEC_READONLY));
1453 if (s == NULL
1454 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
1455 return FALSE;
1456 htab->srelgot = s;
1457
1458 s = s_got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
1459 if (s == NULL
1460 || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
1461 return FALSE;
1462 htab->sgot = s;
1463
1464 /* The first bit of the global offset table is the header. */
1465 s->size += bed->got_header_size;
1466
1467 if (bed->want_got_plt)
1468 {
1469 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
1470 if (s == NULL
1471 || !bfd_set_section_alignment (abfd, s,
1472 bed->s->log_file_align))
1473 return FALSE;
1474 htab->sgotplt = s;
1475
1476 /* Reserve room for the header. */
1477 s->size += GOTPLT_HEADER_SIZE (tilegx_elf_hash_table (info));
1478 }
1479
1480 if (bed->want_got_sym)
1481 {
1482 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
1483 section. We don't do this in the linker script because we don't want
1484 to define the symbol if we are not creating a global offset
1485 table. */
1486 h = _bfd_elf_define_linkage_sym (abfd, info, s_got,
1487 "_GLOBAL_OFFSET_TABLE_");
1488 elf_hash_table (info)->hgot = h;
1489 if (h == NULL)
1490 return FALSE;
1491 }
1492
1493 return TRUE;
1494 }
1495
1496 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1497 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1498 hash table. */
1499
1500 bfd_boolean
tilegx_elf_create_dynamic_sections(bfd * dynobj,struct bfd_link_info * info)1501 tilegx_elf_create_dynamic_sections (bfd *dynobj,
1502 struct bfd_link_info *info)
1503 {
1504 struct tilegx_elf_link_hash_table *htab;
1505
1506 htab = tilegx_elf_hash_table (info);
1507 BFD_ASSERT (htab != NULL);
1508
1509 if (!tilegx_elf_create_got_section (dynobj, info))
1510 return FALSE;
1511
1512 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1513 return FALSE;
1514
1515 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1516 if (!bfd_link_pic (info))
1517 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
1518
1519 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
1520 || (!bfd_link_pic (info) && !htab->srelbss))
1521 abort ();
1522
1523 return TRUE;
1524 }
1525
1526 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1527
1528 void
tilegx_elf_copy_indirect_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)1529 tilegx_elf_copy_indirect_symbol (struct bfd_link_info *info,
1530 struct elf_link_hash_entry *dir,
1531 struct elf_link_hash_entry *ind)
1532 {
1533 struct tilegx_elf_link_hash_entry *edir, *eind;
1534
1535 edir = (struct tilegx_elf_link_hash_entry *) dir;
1536 eind = (struct tilegx_elf_link_hash_entry *) ind;
1537
1538 if (eind->dyn_relocs != NULL)
1539 {
1540 if (edir->dyn_relocs != NULL)
1541 {
1542 struct tilegx_elf_dyn_relocs **pp;
1543 struct tilegx_elf_dyn_relocs *p;
1544
1545 /* Add reloc counts against the indirect sym to the direct sym
1546 list. Merge any entries against the same section. */
1547 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1548 {
1549 struct tilegx_elf_dyn_relocs *q;
1550
1551 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1552 if (q->sec == p->sec)
1553 {
1554 q->pc_count += p->pc_count;
1555 q->count += p->count;
1556 *pp = p->next;
1557 break;
1558 }
1559 if (q == NULL)
1560 pp = &p->next;
1561 }
1562 *pp = edir->dyn_relocs;
1563 }
1564
1565 edir->dyn_relocs = eind->dyn_relocs;
1566 eind->dyn_relocs = NULL;
1567 }
1568
1569 if (ind->root.type == bfd_link_hash_indirect
1570 && dir->got.refcount <= 0)
1571 {
1572 edir->tls_type = eind->tls_type;
1573 eind->tls_type = GOT_UNKNOWN;
1574 }
1575 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1576 }
1577
1578 static int
tilegx_tls_translate_to_le(int r_type)1579 tilegx_tls_translate_to_le (int r_type)
1580 {
1581 switch (r_type)
1582 {
1583 case R_TILEGX_IMM16_X0_HW0_TLS_GD:
1584 case R_TILEGX_IMM16_X0_HW0_TLS_IE:
1585 return R_TILEGX_IMM16_X0_HW0_TLS_LE;
1586
1587 case R_TILEGX_IMM16_X1_HW0_TLS_GD:
1588 case R_TILEGX_IMM16_X1_HW0_TLS_IE:
1589 return R_TILEGX_IMM16_X1_HW0_TLS_LE;
1590
1591 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD:
1592 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE:
1593 return R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE;
1594
1595 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD:
1596 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE:
1597 return R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE;
1598
1599 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD:
1600 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE:
1601 return R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE;
1602
1603 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD:
1604 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE:
1605 return R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE;
1606 }
1607 return r_type;
1608 }
1609
1610 static int
tilegx_tls_translate_to_ie(int r_type)1611 tilegx_tls_translate_to_ie (int r_type)
1612 {
1613 switch (r_type)
1614 {
1615 case R_TILEGX_IMM16_X0_HW0_TLS_GD:
1616 case R_TILEGX_IMM16_X0_HW0_TLS_IE:
1617 return R_TILEGX_IMM16_X0_HW0_TLS_IE;
1618
1619 case R_TILEGX_IMM16_X1_HW0_TLS_GD:
1620 case R_TILEGX_IMM16_X1_HW0_TLS_IE:
1621 return R_TILEGX_IMM16_X1_HW0_TLS_IE;
1622
1623 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD:
1624 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE:
1625 return R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE;
1626
1627 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD:
1628 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE:
1629 return R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE;
1630
1631 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD:
1632 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE:
1633 return R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE;
1634
1635 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD:
1636 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE:
1637 return R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE;
1638 }
1639 return r_type;
1640 }
1641
1642 static int
tilegx_elf_tls_transition(struct bfd_link_info * info,int r_type,int is_local,bfd_boolean disable_le_transition)1643 tilegx_elf_tls_transition (struct bfd_link_info *info, int r_type,
1644 int is_local, bfd_boolean disable_le_transition)
1645 {
1646 if (bfd_link_pic (info))
1647 return r_type;
1648
1649 if (is_local && !disable_le_transition)
1650 return tilegx_tls_translate_to_le (r_type);
1651 else
1652 return tilegx_tls_translate_to_ie (r_type);
1653 }
1654
1655 /* Look through the relocs for a section during the first phase, and
1656 allocate space in the global offset table or procedure linkage
1657 table. */
1658
1659 bfd_boolean
tilegx_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)1660 tilegx_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
1661 asection *sec, const Elf_Internal_Rela *relocs)
1662 {
1663 struct tilegx_elf_link_hash_table *htab;
1664 Elf_Internal_Shdr *symtab_hdr;
1665 struct elf_link_hash_entry **sym_hashes;
1666 const Elf_Internal_Rela *rel;
1667 const Elf_Internal_Rela *rel_end;
1668 asection *sreloc;
1669 int num_relocs;
1670 bfd_boolean has_tls_gd_or_ie = FALSE, has_tls_add = FALSE;
1671
1672 if (bfd_link_relocatable (info))
1673 return TRUE;
1674
1675 htab = tilegx_elf_hash_table (info);
1676 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1677 sym_hashes = elf_sym_hashes (abfd);
1678
1679 sreloc = NULL;
1680
1681 num_relocs = sec->reloc_count;
1682
1683 BFD_ASSERT (is_tilegx_elf (abfd) || num_relocs == 0);
1684
1685 if (htab->elf.dynobj == NULL)
1686 htab->elf.dynobj = abfd;
1687
1688 rel_end = relocs + num_relocs;
1689
1690 /* Check whether to do optimization to transform TLS GD/IE
1691 referehces to TLS LE. We disable it if we're linking with old
1692 TLS code sequences that do not support such optimization. Old
1693 TLS code sequences have tls_gd_call/tls_ie_load relocations but
1694 no tls_add relocations. */
1695 for (rel = relocs; rel < rel_end && !has_tls_add; rel++)
1696 {
1697 int r_type = TILEGX_ELF_R_TYPE (rel->r_info);
1698 switch (r_type)
1699 {
1700 case R_TILEGX_TLS_GD_CALL:
1701 case R_TILEGX_TLS_IE_LOAD:
1702 has_tls_gd_or_ie = TRUE;
1703 break;
1704 case R_TILEGX_IMM8_X0_TLS_ADD:
1705 case R_TILEGX_IMM8_Y0_TLS_ADD:
1706 case R_TILEGX_IMM8_X1_TLS_ADD:
1707 case R_TILEGX_IMM8_Y1_TLS_ADD:
1708 has_tls_add = TRUE;
1709 break;
1710 }
1711 }
1712
1713 sec->sec_flg0 = (has_tls_gd_or_ie && !has_tls_add);
1714 htab->disable_le_transition |= sec->sec_flg0;
1715
1716 for (rel = relocs; rel < rel_end; rel++)
1717 {
1718 unsigned int r_type;
1719 unsigned long r_symndx;
1720 struct elf_link_hash_entry *h;
1721 int tls_type;
1722
1723 r_symndx = TILEGX_ELF_R_SYMNDX (htab, rel->r_info);
1724 r_type = TILEGX_ELF_R_TYPE (rel->r_info);
1725
1726 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1727 {
1728 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1729 abfd, r_symndx);
1730 return FALSE;
1731 }
1732
1733 if (r_symndx < symtab_hdr->sh_info)
1734 h = NULL;
1735 else
1736 {
1737 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1738 while (h->root.type == bfd_link_hash_indirect
1739 || h->root.type == bfd_link_hash_warning)
1740 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1741
1742 /* PR15323, ref flags aren't set for references in the same
1743 object. */
1744 h->root.non_ir_ref = 1;
1745 }
1746
1747 r_type = tilegx_elf_tls_transition (info, r_type, h == NULL,
1748 sec->sec_flg0);
1749 switch (r_type)
1750 {
1751 case R_TILEGX_IMM16_X0_HW0_TLS_LE:
1752 case R_TILEGX_IMM16_X1_HW0_TLS_LE:
1753 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE:
1754 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE:
1755 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE:
1756 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE:
1757 if (bfd_link_pic (info))
1758 goto r_tilegx_plt32;
1759 break;
1760
1761 case R_TILEGX_IMM16_X0_HW0_TLS_GD:
1762 case R_TILEGX_IMM16_X1_HW0_TLS_GD:
1763 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD:
1764 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD:
1765 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD:
1766 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD:
1767 BFD_ASSERT (bfd_link_pic (info));
1768 tls_type = GOT_TLS_GD;
1769 goto have_got_reference;
1770
1771 case R_TILEGX_IMM16_X0_HW0_TLS_IE:
1772 case R_TILEGX_IMM16_X1_HW0_TLS_IE:
1773 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE:
1774 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE:
1775 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE:
1776 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE:
1777 tls_type = GOT_TLS_IE;
1778 if (bfd_link_pic (info))
1779 info->flags |= DF_STATIC_TLS;
1780 goto have_got_reference;
1781
1782 case R_TILEGX_IMM16_X0_HW0_GOT:
1783 case R_TILEGX_IMM16_X1_HW0_GOT:
1784 case R_TILEGX_IMM16_X0_HW0_LAST_GOT:
1785 case R_TILEGX_IMM16_X1_HW0_LAST_GOT:
1786 case R_TILEGX_IMM16_X0_HW1_LAST_GOT:
1787 case R_TILEGX_IMM16_X1_HW1_LAST_GOT:
1788 tls_type = GOT_NORMAL;
1789 /* Fall Through */
1790
1791 have_got_reference:
1792 /* This symbol requires a global offset table entry. */
1793 {
1794 int old_tls_type;
1795
1796 if (h != NULL)
1797 {
1798 h->got.refcount += 1;
1799 old_tls_type = tilegx_elf_hash_entry(h)->tls_type;
1800 }
1801 else
1802 {
1803 bfd_signed_vma *local_got_refcounts;
1804
1805 /* This is a global offset table entry for a local symbol. */
1806 local_got_refcounts = elf_local_got_refcounts (abfd);
1807 if (local_got_refcounts == NULL)
1808 {
1809 bfd_size_type size;
1810
1811 size = symtab_hdr->sh_info;
1812 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1813 local_got_refcounts = ((bfd_signed_vma *)
1814 bfd_zalloc (abfd, size));
1815 if (local_got_refcounts == NULL)
1816 return FALSE;
1817 elf_local_got_refcounts (abfd) = local_got_refcounts;
1818 _bfd_tilegx_elf_local_got_tls_type (abfd)
1819 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1820 }
1821 local_got_refcounts[r_symndx] += 1;
1822 old_tls_type = _bfd_tilegx_elf_local_got_tls_type (abfd) [r_symndx];
1823 }
1824
1825 /* If a TLS symbol is accessed using IE at least once,
1826 there is no point to use dynamic model for it. */
1827 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1828 && (old_tls_type != GOT_TLS_GD
1829 || tls_type != GOT_TLS_IE))
1830 {
1831 if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD)
1832 tls_type = old_tls_type;
1833 else
1834 {
1835 (*_bfd_error_handler)
1836 (_("%B: `%s' accessed both as normal and thread local symbol"),
1837 abfd, h ? h->root.root.string : "<local>");
1838 return FALSE;
1839 }
1840 }
1841
1842 if (old_tls_type != tls_type)
1843 {
1844 if (h != NULL)
1845 tilegx_elf_hash_entry (h)->tls_type = tls_type;
1846 else
1847 _bfd_tilegx_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
1848 }
1849 }
1850
1851 if (htab->elf.sgot == NULL)
1852 {
1853 if (!tilegx_elf_create_got_section (htab->elf.dynobj, info))
1854 return FALSE;
1855 }
1856 break;
1857
1858 case R_TILEGX_TLS_GD_CALL:
1859 if (bfd_link_pic (info))
1860 {
1861 /* These are basically R_TILEGX_JUMPOFF_X1_PLT relocs
1862 against __tls_get_addr. */
1863 struct bfd_link_hash_entry *bh = NULL;
1864 if (! _bfd_generic_link_add_one_symbol (info, abfd,
1865 "__tls_get_addr", 0,
1866 bfd_und_section_ptr, 0,
1867 NULL, FALSE, FALSE,
1868 &bh))
1869 return FALSE;
1870 h = (struct elf_link_hash_entry *) bh;
1871 }
1872 else
1873 break;
1874 /* Fall through */
1875
1876 case R_TILEGX_JUMPOFF_X1_PLT:
1877 case R_TILEGX_IMM16_X0_HW0_PLT_PCREL:
1878 case R_TILEGX_IMM16_X1_HW0_PLT_PCREL:
1879 case R_TILEGX_IMM16_X0_HW1_PLT_PCREL:
1880 case R_TILEGX_IMM16_X1_HW1_PLT_PCREL:
1881 case R_TILEGX_IMM16_X0_HW2_PLT_PCREL:
1882 case R_TILEGX_IMM16_X1_HW2_PLT_PCREL:
1883 case R_TILEGX_IMM16_X0_HW3_PLT_PCREL:
1884 case R_TILEGX_IMM16_X1_HW3_PLT_PCREL:
1885 case R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL:
1886 case R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL:
1887 case R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL:
1888 case R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL:
1889 case R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL:
1890 case R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL:
1891 /* This symbol requires a procedure linkage table entry. We
1892 actually build the entry in adjust_dynamic_symbol,
1893 because this might be a case of linking PIC code without
1894 linking in any dynamic objects, in which case we don't
1895 need to generate a procedure linkage table after all. */
1896
1897 if (h != NULL)
1898 {
1899 h->needs_plt = 1;
1900 h->plt.refcount += 1;
1901 }
1902 break;
1903
1904 case R_TILEGX_64_PCREL:
1905 case R_TILEGX_32_PCREL:
1906 case R_TILEGX_16_PCREL:
1907 case R_TILEGX_8_PCREL:
1908 case R_TILEGX_IMM16_X0_HW0_PCREL:
1909 case R_TILEGX_IMM16_X1_HW0_PCREL:
1910 case R_TILEGX_IMM16_X0_HW1_PCREL:
1911 case R_TILEGX_IMM16_X1_HW1_PCREL:
1912 case R_TILEGX_IMM16_X0_HW2_PCREL:
1913 case R_TILEGX_IMM16_X1_HW2_PCREL:
1914 case R_TILEGX_IMM16_X0_HW3_PCREL:
1915 case R_TILEGX_IMM16_X1_HW3_PCREL:
1916 case R_TILEGX_IMM16_X0_HW0_LAST_PCREL:
1917 case R_TILEGX_IMM16_X1_HW0_LAST_PCREL:
1918 case R_TILEGX_IMM16_X0_HW1_LAST_PCREL:
1919 case R_TILEGX_IMM16_X1_HW1_LAST_PCREL:
1920 case R_TILEGX_IMM16_X0_HW2_LAST_PCREL:
1921 case R_TILEGX_IMM16_X1_HW2_LAST_PCREL:
1922 if (h != NULL)
1923 h->non_got_ref = 1;
1924
1925 if (h != NULL
1926 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1927 break;
1928 /* Fall through. */
1929
1930 case R_TILEGX_64:
1931 case R_TILEGX_32:
1932 case R_TILEGX_16:
1933 case R_TILEGX_8:
1934 case R_TILEGX_HW0:
1935 case R_TILEGX_HW1:
1936 case R_TILEGX_HW2:
1937 case R_TILEGX_HW3:
1938 case R_TILEGX_HW0_LAST:
1939 case R_TILEGX_HW1_LAST:
1940 case R_TILEGX_HW2_LAST:
1941 case R_TILEGX_COPY:
1942 case R_TILEGX_GLOB_DAT:
1943 case R_TILEGX_JMP_SLOT:
1944 case R_TILEGX_RELATIVE:
1945 case R_TILEGX_BROFF_X1:
1946 case R_TILEGX_JUMPOFF_X1:
1947 case R_TILEGX_IMM8_X0:
1948 case R_TILEGX_IMM8_Y0:
1949 case R_TILEGX_IMM8_X1:
1950 case R_TILEGX_IMM8_Y1:
1951 case R_TILEGX_DEST_IMM8_X1:
1952 case R_TILEGX_MT_IMM14_X1:
1953 case R_TILEGX_MF_IMM14_X1:
1954 case R_TILEGX_MMSTART_X0:
1955 case R_TILEGX_MMEND_X0:
1956 case R_TILEGX_SHAMT_X0:
1957 case R_TILEGX_SHAMT_X1:
1958 case R_TILEGX_SHAMT_Y0:
1959 case R_TILEGX_SHAMT_Y1:
1960 case R_TILEGX_IMM16_X0_HW0:
1961 case R_TILEGX_IMM16_X1_HW0:
1962 case R_TILEGX_IMM16_X0_HW1:
1963 case R_TILEGX_IMM16_X1_HW1:
1964 case R_TILEGX_IMM16_X0_HW2:
1965 case R_TILEGX_IMM16_X1_HW2:
1966 case R_TILEGX_IMM16_X0_HW3:
1967 case R_TILEGX_IMM16_X1_HW3:
1968 case R_TILEGX_IMM16_X0_HW0_LAST:
1969 case R_TILEGX_IMM16_X1_HW0_LAST:
1970 case R_TILEGX_IMM16_X0_HW1_LAST:
1971 case R_TILEGX_IMM16_X1_HW1_LAST:
1972 case R_TILEGX_IMM16_X0_HW2_LAST:
1973 case R_TILEGX_IMM16_X1_HW2_LAST:
1974 if (h != NULL)
1975 h->non_got_ref = 1;
1976
1977 r_tilegx_plt32:
1978 if (h != NULL && !bfd_link_pic (info))
1979 {
1980 /* We may need a .plt entry if the function this reloc
1981 refers to is in a shared lib. */
1982 h->plt.refcount += 1;
1983 }
1984
1985 /* If we are creating a shared library, and this is a reloc
1986 against a global symbol, or a non PC relative reloc
1987 against a local symbol, then we need to copy the reloc
1988 into the shared library. However, if we are linking with
1989 -Bsymbolic, we do not need to copy a reloc against a
1990 global symbol which is defined in an object we are
1991 including in the link (i.e., DEF_REGULAR is set). At
1992 this point we have not seen all the input files, so it is
1993 possible that DEF_REGULAR is not set now but will be set
1994 later (it is never cleared). In case of a weak definition,
1995 DEF_REGULAR may be cleared later by a strong definition in
1996 a shared library. We account for that possibility below by
1997 storing information in the relocs_copied field of the hash
1998 table entry. A similar situation occurs when creating
1999 shared libraries and symbol visibility changes render the
2000 symbol local.
2001
2002 If on the other hand, we are creating an executable, we
2003 may need to keep relocations for symbols satisfied by a
2004 dynamic library if we manage to avoid copy relocs for the
2005 symbol. */
2006 if ((bfd_link_pic (info)
2007 && (sec->flags & SEC_ALLOC) != 0
2008 && (! tilegx_elf_howto_table[r_type].pc_relative
2009 || (h != NULL
2010 && (! info->symbolic
2011 || h->root.type == bfd_link_hash_defweak
2012 || !h->def_regular))))
2013 || (!bfd_link_pic (info)
2014 && (sec->flags & SEC_ALLOC) != 0
2015 && h != NULL
2016 && (h->root.type == bfd_link_hash_defweak
2017 || !h->def_regular)))
2018 {
2019 struct tilegx_elf_dyn_relocs *p;
2020 struct tilegx_elf_dyn_relocs **head;
2021
2022 /* When creating a shared object, we must copy these
2023 relocs into the output file. We create a reloc
2024 section in dynobj and make room for the reloc. */
2025 if (sreloc == NULL)
2026 {
2027 sreloc = _bfd_elf_make_dynamic_reloc_section
2028 (sec, htab->elf.dynobj, htab->word_align_power, abfd,
2029 /*rela?*/ TRUE);
2030
2031 if (sreloc == NULL)
2032 return FALSE;
2033 }
2034
2035 /* If this is a global symbol, we count the number of
2036 relocations we need for this symbol. */
2037 if (h != NULL)
2038 head =
2039 &((struct tilegx_elf_link_hash_entry *) h)->dyn_relocs;
2040 else
2041 {
2042 /* Track dynamic relocs needed for local syms too.
2043 We really need local syms available to do this
2044 easily. Oh well. */
2045
2046 asection *s;
2047 void *vpp;
2048 Elf_Internal_Sym *isym;
2049
2050 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2051 abfd, r_symndx);
2052 if (isym == NULL)
2053 return FALSE;
2054
2055 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2056 if (s == NULL)
2057 s = sec;
2058
2059 vpp = &elf_section_data (s)->local_dynrel;
2060 head = (struct tilegx_elf_dyn_relocs **) vpp;
2061 }
2062
2063 p = *head;
2064 if (p == NULL || p->sec != sec)
2065 {
2066 bfd_size_type amt = sizeof *p;
2067 p = ((struct tilegx_elf_dyn_relocs *)
2068 bfd_alloc (htab->elf.dynobj, amt));
2069 if (p == NULL)
2070 return FALSE;
2071 p->next = *head;
2072 *head = p;
2073 p->sec = sec;
2074 p->count = 0;
2075 p->pc_count = 0;
2076 }
2077
2078 p->count += 1;
2079 if (tilegx_elf_howto_table[r_type].pc_relative)
2080 p->pc_count += 1;
2081 }
2082
2083 break;
2084
2085 case R_TILEGX_GNU_VTINHERIT:
2086 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2087 return FALSE;
2088 break;
2089
2090 case R_TILEGX_GNU_VTENTRY:
2091 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2092 return FALSE;
2093 break;
2094
2095 default:
2096 break;
2097 }
2098 }
2099
2100 return TRUE;
2101 }
2102
2103
2104 asection *
tilegx_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)2105 tilegx_elf_gc_mark_hook (asection *sec,
2106 struct bfd_link_info *info,
2107 Elf_Internal_Rela *rel,
2108 struct elf_link_hash_entry *h,
2109 Elf_Internal_Sym *sym)
2110 {
2111 if (h != NULL)
2112 {
2113 switch (TILEGX_ELF_R_TYPE (rel->r_info))
2114 {
2115 case R_TILEGX_GNU_VTINHERIT:
2116 case R_TILEGX_GNU_VTENTRY:
2117 return NULL;
2118 }
2119 }
2120
2121 /* FIXME: The test here, in check_relocs and in relocate_section
2122 dealing with TLS optimization, ought to be !bfd_link_executable (info). */
2123 if (bfd_link_pic (info))
2124 {
2125 switch (TILEGX_ELF_R_TYPE (rel->r_info))
2126 {
2127 case R_TILEGX_TLS_GD_CALL:
2128 /* This reloc implicitly references __tls_get_addr. We know
2129 another reloc will reference the same symbol as the one
2130 on this reloc, so the real symbol and section will be
2131 gc marked when processing the other reloc. That lets
2132 us handle __tls_get_addr here. */
2133 h = elf_link_hash_lookup (elf_hash_table (info), "__tls_get_addr",
2134 FALSE, FALSE, TRUE);
2135 BFD_ASSERT (h != NULL);
2136 h->mark = 1;
2137 if (h->u.weakdef != NULL)
2138 h->u.weakdef->mark = 1;
2139 sym = NULL;
2140 }
2141 }
2142
2143 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2144 }
2145
2146 /* Update the got entry reference counts for the section being removed. */
2147 bfd_boolean
tilegx_elf_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)2148 tilegx_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
2149 asection *sec, const Elf_Internal_Rela *relocs)
2150 {
2151 struct tilegx_elf_link_hash_table *htab;
2152 Elf_Internal_Shdr *symtab_hdr;
2153 struct elf_link_hash_entry **sym_hashes;
2154 bfd_signed_vma *local_got_refcounts;
2155 const Elf_Internal_Rela *rel, *relend;
2156
2157 if (bfd_link_relocatable (info))
2158 return TRUE;
2159
2160 BFD_ASSERT (is_tilegx_elf (abfd) || sec->reloc_count == 0);
2161
2162 elf_section_data (sec)->local_dynrel = NULL;
2163
2164 htab = tilegx_elf_hash_table (info);
2165 BFD_ASSERT (htab != NULL);
2166 symtab_hdr = &elf_symtab_hdr (abfd);
2167 sym_hashes = elf_sym_hashes (abfd);
2168 local_got_refcounts = elf_local_got_refcounts (abfd);
2169
2170 relend = relocs + sec->reloc_count;
2171 for (rel = relocs; rel < relend; rel++)
2172 {
2173 unsigned long r_symndx;
2174 unsigned int r_type;
2175 struct elf_link_hash_entry *h = NULL;
2176
2177 r_symndx = TILEGX_ELF_R_SYMNDX (htab, rel->r_info);
2178 if (r_symndx >= symtab_hdr->sh_info)
2179 {
2180 struct tilegx_elf_link_hash_entry *eh;
2181 struct tilegx_elf_dyn_relocs **pp;
2182 struct tilegx_elf_dyn_relocs *p;
2183
2184 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2185 while (h->root.type == bfd_link_hash_indirect
2186 || h->root.type == bfd_link_hash_warning)
2187 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2188 eh = (struct tilegx_elf_link_hash_entry *) h;
2189 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2190 if (p->sec == sec)
2191 {
2192 /* Everything must go for SEC. */
2193 *pp = p->next;
2194 break;
2195 }
2196 }
2197
2198 r_type = TILEGX_ELF_R_TYPE (rel->r_info);
2199 r_type = tilegx_elf_tls_transition (info, r_type, h != NULL,
2200 sec->sec_flg0);
2201 switch (r_type)
2202 {
2203 case R_TILEGX_IMM16_X0_HW0_GOT:
2204 case R_TILEGX_IMM16_X1_HW0_GOT:
2205 case R_TILEGX_IMM16_X0_HW0_LAST_GOT:
2206 case R_TILEGX_IMM16_X1_HW0_LAST_GOT:
2207 case R_TILEGX_IMM16_X0_HW1_LAST_GOT:
2208 case R_TILEGX_IMM16_X1_HW1_LAST_GOT:
2209 case R_TILEGX_IMM16_X0_HW0_TLS_GD:
2210 case R_TILEGX_IMM16_X1_HW0_TLS_GD:
2211 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD:
2212 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD:
2213 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD:
2214 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD:
2215 case R_TILEGX_IMM16_X0_HW0_TLS_IE:
2216 case R_TILEGX_IMM16_X1_HW0_TLS_IE:
2217 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE:
2218 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE:
2219 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE:
2220 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE:
2221 if (h != NULL)
2222 {
2223 if (h->got.refcount > 0)
2224 h->got.refcount--;
2225 }
2226 else
2227 {
2228 if (local_got_refcounts &&
2229 local_got_refcounts[r_symndx] > 0)
2230 local_got_refcounts[r_symndx]--;
2231 }
2232 break;
2233
2234 case R_TILEGX_64_PCREL:
2235 case R_TILEGX_32_PCREL:
2236 case R_TILEGX_16_PCREL:
2237 case R_TILEGX_8_PCREL:
2238 case R_TILEGX_IMM16_X0_HW0_PCREL:
2239 case R_TILEGX_IMM16_X1_HW0_PCREL:
2240 case R_TILEGX_IMM16_X0_HW1_PCREL:
2241 case R_TILEGX_IMM16_X1_HW1_PCREL:
2242 case R_TILEGX_IMM16_X0_HW2_PCREL:
2243 case R_TILEGX_IMM16_X1_HW2_PCREL:
2244 case R_TILEGX_IMM16_X0_HW3_PCREL:
2245 case R_TILEGX_IMM16_X1_HW3_PCREL:
2246 case R_TILEGX_IMM16_X0_HW0_LAST_PCREL:
2247 case R_TILEGX_IMM16_X1_HW0_LAST_PCREL:
2248 case R_TILEGX_IMM16_X0_HW1_LAST_PCREL:
2249 case R_TILEGX_IMM16_X1_HW1_LAST_PCREL:
2250 case R_TILEGX_IMM16_X0_HW2_LAST_PCREL:
2251 case R_TILEGX_IMM16_X1_HW2_LAST_PCREL:
2252 if (h != NULL
2253 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2254 break;
2255 /* Fall through. */
2256
2257 case R_TILEGX_64:
2258 case R_TILEGX_32:
2259 case R_TILEGX_16:
2260 case R_TILEGX_8:
2261 case R_TILEGX_HW0:
2262 case R_TILEGX_HW1:
2263 case R_TILEGX_HW2:
2264 case R_TILEGX_HW3:
2265 case R_TILEGX_HW0_LAST:
2266 case R_TILEGX_HW1_LAST:
2267 case R_TILEGX_HW2_LAST:
2268 case R_TILEGX_COPY:
2269 case R_TILEGX_GLOB_DAT:
2270 case R_TILEGX_JMP_SLOT:
2271 case R_TILEGX_RELATIVE:
2272 case R_TILEGX_BROFF_X1:
2273 case R_TILEGX_JUMPOFF_X1:
2274 case R_TILEGX_IMM8_X0:
2275 case R_TILEGX_IMM8_Y0:
2276 case R_TILEGX_IMM8_X1:
2277 case R_TILEGX_IMM8_Y1:
2278 case R_TILEGX_DEST_IMM8_X1:
2279 case R_TILEGX_MT_IMM14_X1:
2280 case R_TILEGX_MF_IMM14_X1:
2281 case R_TILEGX_MMSTART_X0:
2282 case R_TILEGX_MMEND_X0:
2283 case R_TILEGX_SHAMT_X0:
2284 case R_TILEGX_SHAMT_X1:
2285 case R_TILEGX_SHAMT_Y0:
2286 case R_TILEGX_SHAMT_Y1:
2287 case R_TILEGX_IMM16_X0_HW0:
2288 case R_TILEGX_IMM16_X1_HW0:
2289 case R_TILEGX_IMM16_X0_HW1:
2290 case R_TILEGX_IMM16_X1_HW1:
2291 case R_TILEGX_IMM16_X0_HW2:
2292 case R_TILEGX_IMM16_X1_HW2:
2293 case R_TILEGX_IMM16_X0_HW3:
2294 case R_TILEGX_IMM16_X1_HW3:
2295 case R_TILEGX_IMM16_X0_HW0_LAST:
2296 case R_TILEGX_IMM16_X1_HW0_LAST:
2297 case R_TILEGX_IMM16_X0_HW1_LAST:
2298 case R_TILEGX_IMM16_X1_HW1_LAST:
2299 case R_TILEGX_IMM16_X0_HW2_LAST:
2300 case R_TILEGX_IMM16_X1_HW2_LAST:
2301 if (bfd_link_pic (info))
2302 break;
2303 /* Fall through. */
2304
2305 case R_TILEGX_JUMPOFF_X1_PLT:
2306 case R_TILEGX_IMM16_X0_HW0_PLT_PCREL:
2307 case R_TILEGX_IMM16_X1_HW0_PLT_PCREL:
2308 case R_TILEGX_IMM16_X0_HW1_PLT_PCREL:
2309 case R_TILEGX_IMM16_X1_HW1_PLT_PCREL:
2310 case R_TILEGX_IMM16_X0_HW2_PLT_PCREL:
2311 case R_TILEGX_IMM16_X1_HW2_PLT_PCREL:
2312 case R_TILEGX_IMM16_X0_HW3_PLT_PCREL:
2313 case R_TILEGX_IMM16_X1_HW3_PLT_PCREL:
2314 case R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL:
2315 case R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL:
2316 case R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL:
2317 case R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL:
2318 case R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL:
2319 case R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL:
2320 if (h != NULL)
2321 {
2322 if (h->plt.refcount > 0)
2323 h->plt.refcount--;
2324 }
2325 break;
2326
2327 default:
2328 break;
2329 }
2330 }
2331
2332 return TRUE;
2333 }
2334
2335 /* Adjust a symbol defined by a dynamic object and referenced by a
2336 regular object. The current definition is in some section of the
2337 dynamic object, but we're not including those sections. We have to
2338 change the definition to something the rest of the link can
2339 understand. */
2340
2341 bfd_boolean
tilegx_elf_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)2342 tilegx_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2343 struct elf_link_hash_entry *h)
2344 {
2345 struct tilegx_elf_link_hash_table *htab;
2346 struct tilegx_elf_link_hash_entry * eh;
2347 struct tilegx_elf_dyn_relocs *p;
2348 bfd *dynobj;
2349 asection *s;
2350
2351 htab = tilegx_elf_hash_table (info);
2352 BFD_ASSERT (htab != NULL);
2353
2354 dynobj = htab->elf.dynobj;
2355
2356 /* Make sure we know what is going on here. */
2357 BFD_ASSERT (dynobj != NULL
2358 && (h->needs_plt
2359 || h->u.weakdef != NULL
2360 || (h->def_dynamic
2361 && h->ref_regular
2362 && !h->def_regular)));
2363
2364 /* If this is a function, put it in the procedure linkage table. We
2365 will fill in the contents of the procedure linkage table later
2366 (although we could actually do it here). */
2367 if (h->type == STT_FUNC || h->needs_plt)
2368 {
2369 if (h->plt.refcount <= 0
2370 || SYMBOL_CALLS_LOCAL (info, h)
2371 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2372 && h->root.type == bfd_link_hash_undefweak))
2373 {
2374 /* This case can occur if we saw a R_TILEGX_JUMPOFF_X1_PLT
2375 reloc in an input file, but the symbol was never referred
2376 to by a dynamic object, or if all references were garbage
2377 collected. In such a case, we don't actually need to build
2378 a procedure linkage table, and we can just do a
2379 R_TILEGX_JUMPOFF_X1 relocation instead. */
2380 h->plt.offset = (bfd_vma) -1;
2381 h->needs_plt = 0;
2382 }
2383
2384 return TRUE;
2385 }
2386 else
2387 h->plt.offset = (bfd_vma) -1;
2388
2389 /* If this is a weak symbol, and there is a real definition, the
2390 processor independent code will have arranged for us to see the
2391 real definition first, and we can just use the same value. */
2392 if (h->u.weakdef != NULL)
2393 {
2394 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2395 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2396 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2397 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2398 return TRUE;
2399 }
2400
2401 /* This is a reference to a symbol defined by a dynamic object which
2402 is not a function. */
2403
2404 /* If we are creating a shared library, we must presume that the
2405 only references to the symbol are via the global offset table.
2406 For such cases we need not do anything here; the relocations will
2407 be handled correctly by relocate_section. */
2408 if (bfd_link_pic (info))
2409 return TRUE;
2410
2411 /* If there are no references to this symbol that do not use the
2412 GOT, we don't need to generate a copy reloc. */
2413 if (!h->non_got_ref)
2414 return TRUE;
2415
2416 /* If -z nocopyreloc was given, we won't generate them either. */
2417 if (info->nocopyreloc)
2418 {
2419 h->non_got_ref = 0;
2420 return TRUE;
2421 }
2422
2423 eh = (struct tilegx_elf_link_hash_entry *) h;
2424 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2425 {
2426 s = p->sec->output_section;
2427 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2428 break;
2429 }
2430
2431 /* If we didn't find any dynamic relocs in read-only sections, then
2432 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2433 if (p == NULL)
2434 {
2435 h->non_got_ref = 0;
2436 return TRUE;
2437 }
2438
2439 /* We must allocate the symbol in our .dynbss section, which will
2440 become part of the .bss section of the executable. There will be
2441 an entry for this symbol in the .dynsym section. The dynamic
2442 object will contain position independent code, so all references
2443 from the dynamic object to this symbol will go through the global
2444 offset table. The dynamic linker will use the .dynsym entry to
2445 determine the address it must put in the global offset table, so
2446 both the dynamic object and the regular object will refer to the
2447 same memory location for the variable. */
2448
2449 /* We must generate a R_TILEGX_COPY reloc to tell the dynamic linker
2450 to copy the initial value out of the dynamic object and into the
2451 runtime process image. We need to remember the offset into the
2452 .rel.bss section we are going to use. */
2453 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2454 {
2455 htab->srelbss->size += TILEGX_ELF_RELA_BYTES (htab);
2456 h->needs_copy = 1;
2457 }
2458
2459 return _bfd_elf_adjust_dynamic_copy (info, h, htab->sdynbss);
2460 }
2461
2462 /* Allocate space in .plt, .got and associated reloc sections for
2463 dynamic relocs. */
2464
2465 static bfd_boolean
allocate_dynrelocs(struct elf_link_hash_entry * h,void * inf)2466 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2467 {
2468 struct bfd_link_info *info;
2469 struct tilegx_elf_link_hash_table *htab;
2470 struct tilegx_elf_link_hash_entry *eh;
2471 struct tilegx_elf_dyn_relocs *p;
2472
2473 if (h->root.type == bfd_link_hash_indirect)
2474 return TRUE;
2475
2476 info = (struct bfd_link_info *) inf;
2477 htab = tilegx_elf_hash_table (info);
2478 BFD_ASSERT (htab != NULL);
2479
2480 if (htab->elf.dynamic_sections_created
2481 && h->plt.refcount > 0)
2482 {
2483 /* Make sure this symbol is output as a dynamic symbol.
2484 Undefined weak syms won't yet be marked as dynamic. */
2485 if (h->dynindx == -1
2486 && !h->forced_local)
2487 {
2488 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2489 return FALSE;
2490 }
2491
2492 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
2493 {
2494 asection *s = htab->elf.splt;
2495
2496 /* Allocate room for the header and tail. */
2497 if (s->size == 0)
2498 {
2499 s->size = PLT_ENTRY_SIZE;
2500 }
2501
2502 h->plt.offset = s->size - PLT_ENTRY_SIZE + PLT_HEADER_SIZE;
2503
2504 /* If this symbol is not defined in a regular file, and we are
2505 not generating a shared library, then set the symbol to this
2506 location in the .plt. This is required to make function
2507 pointers compare as equal between the normal executable and
2508 the shared library. */
2509 if (! bfd_link_pic (info)
2510 && !h->def_regular)
2511 {
2512 h->root.u.def.section = s;
2513 h->root.u.def.value = h->plt.offset;
2514 }
2515
2516 /* Make room for this entry. */
2517 s->size += PLT_ENTRY_SIZE;
2518
2519 /* We also need to make an entry in the .got.plt section. */
2520 htab->elf.sgotplt->size += GOT_ENTRY_SIZE (htab);
2521
2522 /* We also need to make an entry in the .rela.plt section. */
2523 htab->elf.srelplt->size += TILEGX_ELF_RELA_BYTES (htab);
2524 }
2525 else
2526 {
2527 h->plt.offset = (bfd_vma) -1;
2528 h->needs_plt = 0;
2529 }
2530 }
2531 else
2532 {
2533 h->plt.offset = (bfd_vma) -1;
2534 h->needs_plt = 0;
2535 }
2536
2537 /* If a TLS_IE symbol is now local to the binary, make it a TLS_LE
2538 requiring no TLS entry. */
2539 if (h->got.refcount > 0
2540 && !htab->disable_le_transition
2541 && !bfd_link_pic (info)
2542 && h->dynindx == -1
2543 && tilegx_elf_hash_entry(h)->tls_type == GOT_TLS_IE)
2544 h->got.offset = (bfd_vma) -1;
2545 else if (h->got.refcount > 0)
2546 {
2547 asection *s;
2548 bfd_boolean dyn;
2549 int tls_type = tilegx_elf_hash_entry(h)->tls_type;
2550
2551 /* Make sure this symbol is output as a dynamic symbol.
2552 Undefined weak syms won't yet be marked as dynamic. */
2553 if (h->dynindx == -1
2554 && !h->forced_local)
2555 {
2556 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2557 return FALSE;
2558 }
2559
2560 s = htab->elf.sgot;
2561 h->got.offset = s->size;
2562 s->size += TILEGX_ELF_WORD_BYTES (htab);
2563 /* TLS_GD entries need 2 consecutive GOT slots. */
2564 if (tls_type == GOT_TLS_GD)
2565 s->size += TILEGX_ELF_WORD_BYTES (htab);
2566 dyn = htab->elf.dynamic_sections_created;
2567 /* TLS_IE needs one dynamic relocation,
2568 TLS_GD needs two if local symbol and two if global. */
2569 if (tls_type == GOT_TLS_GD || tls_type == GOT_TLS_IE)
2570 htab->elf.srelgot->size += 2 * TILEGX_ELF_RELA_BYTES (htab);
2571 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2572 bfd_link_pic (info),
2573 h))
2574 htab->elf.srelgot->size += TILEGX_ELF_RELA_BYTES (htab);
2575 }
2576 else
2577 h->got.offset = (bfd_vma) -1;
2578
2579 eh = (struct tilegx_elf_link_hash_entry *) h;
2580 if (eh->dyn_relocs == NULL)
2581 return TRUE;
2582
2583 /* In the shared -Bsymbolic case, discard space allocated for
2584 dynamic pc-relative relocs against symbols which turn out to be
2585 defined in regular objects. For the normal shared case, discard
2586 space for pc-relative relocs that have become local due to symbol
2587 visibility changes. */
2588
2589 if (bfd_link_pic (info))
2590 {
2591 if (SYMBOL_CALLS_LOCAL (info, h))
2592 {
2593 struct tilegx_elf_dyn_relocs **pp;
2594
2595 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2596 {
2597 p->count -= p->pc_count;
2598 p->pc_count = 0;
2599 if (p->count == 0)
2600 *pp = p->next;
2601 else
2602 pp = &p->next;
2603 }
2604 }
2605
2606 /* Also discard relocs on undefined weak syms with non-default
2607 visibility. */
2608 if (eh->dyn_relocs != NULL
2609 && h->root.type == bfd_link_hash_undefweak)
2610 {
2611 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2612 eh->dyn_relocs = NULL;
2613
2614 /* Make sure undefined weak symbols are output as a dynamic
2615 symbol in PIEs. */
2616 else if (h->dynindx == -1
2617 && !h->forced_local)
2618 {
2619 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2620 return FALSE;
2621 }
2622 }
2623 }
2624 else
2625 {
2626 /* For the non-shared case, discard space for relocs against
2627 symbols which turn out to need copy relocs or are not
2628 dynamic. */
2629
2630 if (!h->non_got_ref
2631 && ((h->def_dynamic
2632 && !h->def_regular)
2633 || (htab->elf.dynamic_sections_created
2634 && (h->root.type == bfd_link_hash_undefweak
2635 || h->root.type == bfd_link_hash_undefined))))
2636 {
2637 /* Make sure this symbol is output as a dynamic symbol.
2638 Undefined weak syms won't yet be marked as dynamic. */
2639 if (h->dynindx == -1
2640 && !h->forced_local)
2641 {
2642 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2643 return FALSE;
2644 }
2645
2646 /* If that succeeded, we know we'll be keeping all the
2647 relocs. */
2648 if (h->dynindx != -1)
2649 goto keep;
2650 }
2651
2652 eh->dyn_relocs = NULL;
2653
2654 keep: ;
2655 }
2656
2657 /* Finally, allocate space. */
2658 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2659 {
2660 asection *sreloc = elf_section_data (p->sec)->sreloc;
2661 sreloc->size += p->count * TILEGX_ELF_RELA_BYTES (htab);
2662 }
2663
2664 return TRUE;
2665 }
2666
2667 /* Find any dynamic relocs that apply to read-only sections. */
2668
2669 static bfd_boolean
readonly_dynrelocs(struct elf_link_hash_entry * h,void * inf)2670 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2671 {
2672 struct tilegx_elf_link_hash_entry *eh;
2673 struct tilegx_elf_dyn_relocs *p;
2674
2675 eh = (struct tilegx_elf_link_hash_entry *) h;
2676 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2677 {
2678 asection *s = p->sec->output_section;
2679
2680 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2681 {
2682 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2683
2684 info->flags |= DF_TEXTREL;
2685
2686 /* Not an error, just cut short the traversal. */
2687 return FALSE;
2688 }
2689 }
2690 return TRUE;
2691 }
2692
2693 /* Return true if the dynamic symbol for a given section should be
2694 omitted when creating a shared library. */
2695
2696 bfd_boolean
tilegx_elf_omit_section_dynsym(bfd * output_bfd,struct bfd_link_info * info,asection * p)2697 tilegx_elf_omit_section_dynsym (bfd *output_bfd,
2698 struct bfd_link_info *info,
2699 asection *p)
2700 {
2701 /* We keep the .got section symbol so that explicit relocations
2702 against the _GLOBAL_OFFSET_TABLE_ symbol emitted in PIC mode
2703 can be turned into relocations against the .got symbol. */
2704 if (strcmp (p->name, ".got") == 0)
2705 return FALSE;
2706
2707 return _bfd_elf_link_omit_section_dynsym (output_bfd, info, p);
2708 }
2709
2710 bfd_boolean
tilegx_elf_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)2711 tilegx_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2712 struct bfd_link_info *info)
2713 {
2714 struct tilegx_elf_link_hash_table *htab;
2715 bfd *dynobj;
2716 asection *s;
2717 bfd *ibfd;
2718
2719 htab = tilegx_elf_hash_table (info);
2720 BFD_ASSERT (htab != NULL);
2721 dynobj = htab->elf.dynobj;
2722 BFD_ASSERT (dynobj != NULL);
2723
2724 if (elf_hash_table (info)->dynamic_sections_created)
2725 {
2726 /* Set the contents of the .interp section to the interpreter. */
2727 if (bfd_link_executable (info) && !info->nointerp)
2728 {
2729 s = bfd_get_linker_section (dynobj, ".interp");
2730 BFD_ASSERT (s != NULL);
2731 s->size = strlen (htab->dynamic_interpreter) + 1;
2732 s->contents = (unsigned char *) htab->dynamic_interpreter;
2733 }
2734 }
2735
2736 /* Set up .got offsets for local syms, and space for local dynamic
2737 relocs. */
2738 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2739 {
2740 bfd_signed_vma *local_got;
2741 bfd_signed_vma *end_local_got;
2742 char *local_tls_type;
2743 bfd_size_type locsymcount;
2744 Elf_Internal_Shdr *symtab_hdr;
2745 asection *srel;
2746
2747 if (! is_tilegx_elf (ibfd))
2748 continue;
2749
2750 for (s = ibfd->sections; s != NULL; s = s->next)
2751 {
2752 struct tilegx_elf_dyn_relocs *p;
2753
2754 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2755 {
2756 if (!bfd_is_abs_section (p->sec)
2757 && bfd_is_abs_section (p->sec->output_section))
2758 {
2759 /* Input section has been discarded, either because
2760 it is a copy of a linkonce section or due to
2761 linker script /DISCARD/, so we'll be discarding
2762 the relocs too. */
2763 }
2764 else if (p->count != 0)
2765 {
2766 srel = elf_section_data (p->sec)->sreloc;
2767 srel->size += p->count * TILEGX_ELF_RELA_BYTES (htab);
2768 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2769 info->flags |= DF_TEXTREL;
2770 }
2771 }
2772 }
2773
2774 local_got = elf_local_got_refcounts (ibfd);
2775 if (!local_got)
2776 continue;
2777
2778 symtab_hdr = &elf_symtab_hdr (ibfd);
2779 locsymcount = symtab_hdr->sh_info;
2780 end_local_got = local_got + locsymcount;
2781 local_tls_type = _bfd_tilegx_elf_local_got_tls_type (ibfd);
2782 s = htab->elf.sgot;
2783 srel = htab->elf.srelgot;
2784 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2785 {
2786 if (*local_got > 0)
2787 {
2788 *local_got = s->size;
2789 s->size += TILEGX_ELF_WORD_BYTES (htab);
2790 if (*local_tls_type == GOT_TLS_GD)
2791 s->size += TILEGX_ELF_WORD_BYTES (htab);
2792 if (bfd_link_pic (info)
2793 || *local_tls_type == GOT_TLS_GD
2794 || *local_tls_type == GOT_TLS_IE)
2795 srel->size += TILEGX_ELF_RELA_BYTES (htab);
2796 }
2797 else
2798 *local_got = (bfd_vma) -1;
2799 }
2800 }
2801
2802 /* Allocate global sym .plt and .got entries, and space for global
2803 sym dynamic relocs. */
2804 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2805
2806 if (elf_hash_table (info)->dynamic_sections_created)
2807 {
2808 /* If the .got section is more than 0x8000 bytes, we add
2809 0x8000 to the value of _GLOBAL_OFFSET_TABLE_, so that 16
2810 bit relocations have a greater chance of working. */
2811 if (htab->elf.sgot->size >= 0x8000
2812 && elf_hash_table (info)->hgot->root.u.def.value == 0)
2813 elf_hash_table (info)->hgot->root.u.def.value = 0x8000;
2814 }
2815
2816 if (htab->elf.sgotplt)
2817 {
2818 struct elf_link_hash_entry *got;
2819 got = elf_link_hash_lookup (elf_hash_table (info),
2820 "_GLOBAL_OFFSET_TABLE_",
2821 FALSE, FALSE, FALSE);
2822
2823 /* Don't allocate .got.plt section if there are no GOT nor PLT
2824 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2825 if ((got == NULL
2826 || !got->ref_regular_nonweak)
2827 && (htab->elf.sgotplt->size
2828 == (unsigned)GOTPLT_HEADER_SIZE (htab))
2829 && (htab->elf.splt == NULL
2830 || htab->elf.splt->size == 0)
2831 && (htab->elf.sgot == NULL
2832 || (htab->elf.sgot->size
2833 == get_elf_backend_data (output_bfd)->got_header_size)))
2834 htab->elf.sgotplt->size = 0;
2835 }
2836
2837 /* The check_relocs and adjust_dynamic_symbol entry points have
2838 determined the sizes of the various dynamic sections. Allocate
2839 memory for them. */
2840 for (s = dynobj->sections; s != NULL; s = s->next)
2841 {
2842 if ((s->flags & SEC_LINKER_CREATED) == 0)
2843 continue;
2844
2845 if (s == htab->elf.splt
2846 || s == htab->elf.sgot
2847 || s == htab->elf.sgotplt
2848 || s == htab->sdynbss)
2849 {
2850 /* Strip this section if we don't need it; see the
2851 comment below. */
2852 }
2853 else if (strncmp (s->name, ".rela", 5) == 0)
2854 {
2855 if (s->size != 0)
2856 {
2857 /* We use the reloc_count field as a counter if we need
2858 to copy relocs into the output file. */
2859 s->reloc_count = 0;
2860 }
2861 }
2862 else
2863 {
2864 /* It's not one of our sections. */
2865 continue;
2866 }
2867
2868 if (s->size == 0)
2869 {
2870 /* If we don't need this section, strip it from the
2871 output file. This is mostly to handle .rela.bss and
2872 .rela.plt. We must create both sections in
2873 create_dynamic_sections, because they must be created
2874 before the linker maps input sections to output
2875 sections. The linker does that before
2876 adjust_dynamic_symbol is called, and it is that
2877 function which decides whether anything needs to go
2878 into these sections. */
2879 s->flags |= SEC_EXCLUDE;
2880 continue;
2881 }
2882
2883 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2884 continue;
2885
2886 /* Allocate memory for the section contents. Zero the memory
2887 for the benefit of .rela.plt, which has 4 unused entries
2888 at the beginning, and we don't want garbage. */
2889 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2890 if (s->contents == NULL)
2891 return FALSE;
2892 }
2893
2894 if (elf_hash_table (info)->dynamic_sections_created)
2895 {
2896 /* Add some entries to the .dynamic section. We fill in the
2897 values later, in tilegx_elf_finish_dynamic_sections, but we
2898 must add the entries now so that we get the correct size for
2899 the .dynamic section. The DT_DEBUG entry is filled in by the
2900 dynamic linker and used by the debugger. */
2901 #define add_dynamic_entry(TAG, VAL) \
2902 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2903
2904 if (bfd_link_executable (info))
2905 {
2906 if (!add_dynamic_entry (DT_DEBUG, 0))
2907 return FALSE;
2908 }
2909
2910 if (htab->elf.srelplt->size != 0)
2911 {
2912 if (!add_dynamic_entry (DT_PLTGOT, 0)
2913 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2914 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2915 || !add_dynamic_entry (DT_JMPREL, 0))
2916 return FALSE;
2917 }
2918
2919 if (!add_dynamic_entry (DT_RELA, 0)
2920 || !add_dynamic_entry (DT_RELASZ, 0)
2921 || !add_dynamic_entry (DT_RELAENT, TILEGX_ELF_RELA_BYTES (htab)))
2922 return FALSE;
2923
2924 /* If any dynamic relocs apply to a read-only section,
2925 then we need a DT_TEXTREL entry. */
2926 if ((info->flags & DF_TEXTREL) == 0)
2927 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2928
2929 if (info->flags & DF_TEXTREL)
2930 {
2931 if (!add_dynamic_entry (DT_TEXTREL, 0))
2932 return FALSE;
2933 }
2934 }
2935 #undef add_dynamic_entry
2936
2937 return TRUE;
2938 }
2939
2940 /* Return the base VMA address which should be subtracted from real addresses
2941 when resolving @dtpoff relocation.
2942 This is PT_TLS segment p_vaddr. */
2943
2944 static bfd_vma
dtpoff_base(struct bfd_link_info * info)2945 dtpoff_base (struct bfd_link_info *info)
2946 {
2947 /* If tls_sec is NULL, we should have signalled an error already. */
2948 if (elf_hash_table (info)->tls_sec == NULL)
2949 return 0;
2950 return elf_hash_table (info)->tls_sec->vma;
2951 }
2952
2953 /* Return the relocation value for @tpoff relocation. */
2954
2955 static bfd_vma
tpoff(struct bfd_link_info * info,bfd_vma address)2956 tpoff (struct bfd_link_info *info, bfd_vma address)
2957 {
2958 struct elf_link_hash_table *htab = elf_hash_table (info);
2959
2960 /* If tls_sec is NULL, we should have signalled an error already. */
2961 if (htab->tls_sec == NULL)
2962 return 0;
2963
2964 return (address - htab->tls_sec->vma);
2965 }
2966
2967 /* Copy SIZE bits from FROM to TO at address ADDR. */
2968
2969 static void
tilegx_copy_bits(bfd_byte * addr,int from,int to,int size)2970 tilegx_copy_bits (bfd_byte *addr, int from, int to, int size)
2971 {
2972 int i;
2973 for (i = 0; i < size; i++)
2974 {
2975 int from_byte = (from + i) / 8;
2976 int from_bit = (from + i) % 8;
2977 int to_byte = (to + i) / 8;
2978 int to_bit = (to + i) % 8;
2979 bfd_byte to_mask = 1 << to_bit;
2980 addr[to_byte] = (addr[to_byte] & ~to_mask)
2981 | ((addr[from_byte] >> from_bit << to_bit) & to_mask);
2982 }
2983 }
2984
2985 /* Replace the MASK bits in ADDR with those in INSN, for the next
2986 TILEGX_BUNDLE_SIZE_IN_BYTES bytes. */
2987
2988 static void
tilegx_replace_insn(bfd_byte * addr,const bfd_byte * mask,const bfd_byte * insn)2989 tilegx_replace_insn (bfd_byte *addr, const bfd_byte *mask,
2990 const bfd_byte *insn)
2991 {
2992 int i;
2993 for (i = 0; i < TILEGX_BUNDLE_SIZE_IN_BYTES; i++)
2994 {
2995 addr[i] = (addr[i] & ~mask[i]) | (insn[i] & mask[i]);
2996 }
2997 }
2998
2999 /* Mask to extract the bits corresponding to an instruction in a
3000 specific pipe of a bundle. */
3001 static const bfd_byte insn_mask_X1[] = {
3002 0x00, 0x00, 0x00, 0x80, 0xff, 0xff, 0xff, 0x3f
3003 };
3004
3005 /* Mask to extract the bits corresponding to an instruction in a
3006 specific pipe of a bundle, minus the destination operand and the
3007 first source operand. */
3008 static const bfd_byte insn_mask_X0_no_dest_no_srca[] = {
3009 0x00, 0xf0, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00
3010 };
3011
3012 static const bfd_byte insn_mask_X1_no_dest_no_srca[] = {
3013 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0xff, 0x3f
3014 };
3015
3016 static const bfd_byte insn_mask_Y0_no_dest_no_srca[] = {
3017 0x00, 0xf0, 0x0f, 0x78, 0x00, 0x00, 0x00, 0x00
3018 };
3019 static const bfd_byte insn_mask_Y1_no_dest_no_srca[] = {
3020 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x07, 0x3c
3021 };
3022
3023 /* Mask to extract the bits corresponding to an instruction in a
3024 specific pipe of a bundle, minus the register operands. */
3025 static const bfd_byte insn_mask_X0_no_operand[] = {
3026 0x00, 0x00, 0xfc, 0x7f, 0x00, 0x00, 0x00, 0x00
3027 };
3028
3029 static const bfd_byte insn_mask_X1_no_operand[] = {
3030 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x3f
3031 };
3032
3033 static const bfd_byte insn_mask_Y0_no_operand[] = {
3034 0x00, 0x00, 0x0c, 0x78, 0x00, 0x00, 0x00, 0x00
3035 };
3036
3037 static const bfd_byte insn_mask_Y1_no_operand[] = {
3038 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x3c
3039 };
3040
3041 /* Various instructions synthesized to support tls references. */
3042
3043 /* ld r0, r0 in the X1 pipe, used for tls ie. */
3044 static const bfd_byte insn_tls_ie_ld_X1[] = {
3045 0x00, 0x00, 0x00, 0x00, 0x00, 0xe8, 0x6a, 0x28
3046 };
3047
3048 /* ld4s r0, r0 in the X1 pipe, used for tls ie. */
3049 static const bfd_byte insn_tls_ie_ld4s_X1[] = {
3050 0x00, 0x00, 0x00, 0x00, 0x00, 0x98, 0x6a, 0x28
3051 };
3052
3053 /* add r0, r0, tp in various pipes, used for tls ie. */
3054 static const bfd_byte insn_tls_ie_add_X0X1[] = {
3055 0x00, 0x50, 0x0f, 0x50, 0x00, 0xa8, 0x07, 0x28
3056 };
3057 static const bfd_byte insn_tls_ie_add_Y0Y1[] = {
3058 0x00, 0x50, 0x27, 0x2c, 0x00, 0xa8, 0x13, 0x9a
3059 };
3060
3061 /* addx r0, r0, tp in various pipes, used for tls ie. */
3062 static const bfd_byte insn_tls_ie_addx_X0X1[] = {
3063 0x00, 0x50, 0x0b, 0x50, 0x00, 0xa8, 0x05, 0x28
3064 };
3065 static const bfd_byte insn_tls_ie_addx_Y0Y1[] = {
3066 0x00, 0x50, 0x03, 0x2c, 0x00, 0xa8, 0x01, 0x9a
3067 };
3068
3069 /* move r0, r0 in various pipes, used for tls gd. */
3070 static const bfd_byte insn_tls_gd_add_X0X1[] = {
3071 0x00, 0xf0, 0x07, 0x51, 0x00, 0xf8, 0x3b, 0x28
3072 };
3073 static const bfd_byte insn_tls_gd_add_Y0Y1[] = {
3074 0x00, 0xf0, 0x0b, 0x54, 0x00, 0xf8, 0x05, 0xae
3075 };
3076
3077 static const bfd_byte *insn_move_X0X1 = insn_tls_gd_add_X0X1;
3078 static const bfd_byte *insn_move_Y0Y1 = insn_tls_gd_add_Y0Y1;
3079
3080 static const bfd_byte *insn_add_X0X1 = insn_tls_ie_add_X0X1;
3081 static const bfd_byte *insn_add_Y0Y1 = insn_tls_ie_add_Y0Y1;
3082
3083 static const bfd_byte *insn_addx_X0X1 = insn_tls_ie_addx_X0X1;
3084 static const bfd_byte *insn_addx_Y0Y1 = insn_tls_ie_addx_Y0Y1;
3085
3086 /* Relocate an TILEGX ELF section.
3087
3088 The RELOCATE_SECTION function is called by the new ELF backend linker
3089 to handle the relocations for a section.
3090
3091 The relocs are always passed as Rela structures.
3092
3093 This function is responsible for adjusting the section contents as
3094 necessary, and (if generating a relocatable output file) adjusting
3095 the reloc addend as necessary.
3096
3097 This function does not have to worry about setting the reloc
3098 address or the reloc symbol index.
3099
3100 LOCAL_SYMS is a pointer to the swapped in local symbols.
3101
3102 LOCAL_SECTIONS is an array giving the section in the input file
3103 corresponding to the st_shndx field of each local symbol.
3104
3105 The global hash table entry for the global symbols can be found
3106 via elf_sym_hashes (input_bfd).
3107
3108 When generating relocatable output, this function must handle
3109 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
3110 going to be the section symbol corresponding to the output
3111 section, which means that the addend must be adjusted
3112 accordingly. */
3113
3114 bfd_boolean
tilegx_elf_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)3115 tilegx_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
3116 bfd *input_bfd, asection *input_section,
3117 bfd_byte *contents, Elf_Internal_Rela *relocs,
3118 Elf_Internal_Sym *local_syms,
3119 asection **local_sections)
3120 {
3121 struct tilegx_elf_link_hash_table *htab;
3122 Elf_Internal_Shdr *symtab_hdr;
3123 struct elf_link_hash_entry **sym_hashes;
3124 bfd_vma *local_got_offsets;
3125 bfd_vma got_base;
3126 asection *sreloc;
3127 Elf_Internal_Rela *rel;
3128 Elf_Internal_Rela *relend;
3129 int num_relocs;
3130
3131 htab = tilegx_elf_hash_table (info);
3132 BFD_ASSERT (htab != NULL);
3133 symtab_hdr = &elf_symtab_hdr (input_bfd);
3134 sym_hashes = elf_sym_hashes (input_bfd);
3135 local_got_offsets = elf_local_got_offsets (input_bfd);
3136
3137 if (elf_hash_table (info)->hgot == NULL)
3138 got_base = 0;
3139 else
3140 got_base = elf_hash_table (info)->hgot->root.u.def.value;
3141
3142 sreloc = elf_section_data (input_section)->sreloc;
3143
3144 rel = relocs;
3145 num_relocs = input_section->reloc_count;
3146 relend = relocs + num_relocs;
3147 for (; rel < relend; rel++)
3148 {
3149 int r_type, tls_type;
3150 bfd_boolean is_tls_iele, is_tls_le;
3151 reloc_howto_type *howto;
3152 unsigned long r_symndx;
3153 struct elf_link_hash_entry *h;
3154 Elf_Internal_Sym *sym;
3155 tilegx_create_func create_func;
3156 asection *sec;
3157 bfd_vma relocation;
3158 bfd_reloc_status_type r;
3159 const char *name;
3160 bfd_vma off;
3161 bfd_boolean is_plt = FALSE;
3162
3163 bfd_boolean unresolved_reloc;
3164
3165 r_type = TILEGX_ELF_R_TYPE (rel->r_info);
3166 if (r_type == R_TILEGX_GNU_VTINHERIT
3167 || r_type == R_TILEGX_GNU_VTENTRY)
3168 continue;
3169
3170 if ((unsigned int)r_type >= ARRAY_SIZE (tilegx_elf_howto_table))
3171 {
3172 /* Not clear if we need to check here, but just be paranoid. */
3173 (*_bfd_error_handler)
3174 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3175 input_bfd, r_type, input_section);
3176 bfd_set_error (bfd_error_bad_value);
3177 return FALSE;
3178 }
3179
3180 howto = tilegx_elf_howto_table + r_type;
3181
3182 /* This is a final link. */
3183 r_symndx = TILEGX_ELF_R_SYMNDX (htab, rel->r_info);
3184 h = NULL;
3185 sym = NULL;
3186 sec = NULL;
3187 unresolved_reloc = FALSE;
3188 if (r_symndx < symtab_hdr->sh_info)
3189 {
3190 sym = local_syms + r_symndx;
3191 sec = local_sections[r_symndx];
3192 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3193 }
3194 else
3195 {
3196 bfd_boolean warned ATTRIBUTE_UNUSED;
3197 bfd_boolean ignored ATTRIBUTE_UNUSED;
3198
3199 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3200 r_symndx, symtab_hdr, sym_hashes,
3201 h, sec, relocation,
3202 unresolved_reloc, warned, ignored);
3203 if (warned)
3204 {
3205 /* To avoid generating warning messages about truncated
3206 relocations, set the relocation's address to be the same as
3207 the start of this section. */
3208 if (input_section->output_section != NULL)
3209 relocation = input_section->output_section->vma;
3210 else
3211 relocation = 0;
3212 }
3213 }
3214
3215 if (sec != NULL && discarded_section (sec))
3216 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3217 rel, 1, relend, howto, 0, contents);
3218
3219 if (bfd_link_relocatable (info))
3220 continue;
3221
3222 if (h != NULL)
3223 name = h->root.root.string;
3224 else
3225 {
3226 name = (bfd_elf_string_from_elf_section
3227 (input_bfd, symtab_hdr->sh_link, sym->st_name));
3228 if (name == NULL || *name == '\0')
3229 name = bfd_section_name (input_bfd, sec);
3230 }
3231
3232 switch (r_type)
3233 {
3234 case R_TILEGX_TLS_GD_CALL:
3235 case R_TILEGX_IMM8_X0_TLS_GD_ADD:
3236 case R_TILEGX_IMM8_Y0_TLS_GD_ADD:
3237 case R_TILEGX_IMM8_X1_TLS_GD_ADD:
3238 case R_TILEGX_IMM8_Y1_TLS_GD_ADD:
3239 case R_TILEGX_IMM8_X0_TLS_ADD:
3240 case R_TILEGX_IMM8_Y0_TLS_ADD:
3241 case R_TILEGX_IMM8_X1_TLS_ADD:
3242 case R_TILEGX_IMM8_Y1_TLS_ADD:
3243 tls_type = GOT_UNKNOWN;
3244 if (h == NULL && local_got_offsets)
3245 tls_type =
3246 _bfd_tilegx_elf_local_got_tls_type (input_bfd) [r_symndx];
3247 else if (h != NULL)
3248 tls_type = tilegx_elf_hash_entry(h)->tls_type;
3249
3250 is_tls_iele = (! bfd_link_pic (info) || tls_type == GOT_TLS_IE);
3251 is_tls_le = is_tls_iele && (!input_section->sec_flg0
3252 && !bfd_link_pic (info)
3253 && (h == NULL || h->dynindx == -1));
3254
3255 if (r_type == R_TILEGX_TLS_GD_CALL)
3256 {
3257 if (is_tls_le)
3258 {
3259 /* GD -> LE */
3260 tilegx_replace_insn (contents + rel->r_offset,
3261 insn_mask_X1, insn_move_X0X1);
3262 continue;
3263 }
3264 else if (is_tls_iele)
3265 {
3266 /* GD -> IE */
3267 if (ABI_64_P (output_bfd))
3268 tilegx_replace_insn (contents + rel->r_offset,
3269 insn_mask_X1, insn_tls_ie_ld_X1);
3270 else
3271 tilegx_replace_insn (contents + rel->r_offset,
3272 insn_mask_X1, insn_tls_ie_ld4s_X1);
3273 continue;
3274 }
3275
3276 /* GD -> GD */
3277 h = (struct elf_link_hash_entry *)
3278 bfd_link_hash_lookup (info->hash, "__tls_get_addr", FALSE,
3279 FALSE, TRUE);
3280 BFD_ASSERT (h != NULL);
3281 r_type = R_TILEGX_JUMPOFF_X1_PLT;
3282 howto = tilegx_elf_howto_table + r_type;
3283 }
3284 else if (r_type == R_TILEGX_IMM8_X0_TLS_ADD
3285 || r_type == R_TILEGX_IMM8_X1_TLS_ADD
3286 || r_type == R_TILEGX_IMM8_Y0_TLS_ADD
3287 || r_type == R_TILEGX_IMM8_Y1_TLS_ADD)
3288 {
3289 bfd_boolean is_pipe0 =
3290 (r_type == R_TILEGX_IMM8_X0_TLS_ADD
3291 || r_type == R_TILEGX_IMM8_Y0_TLS_ADD);
3292 bfd_boolean is_X0X1 =
3293 (r_type == R_TILEGX_IMM8_X0_TLS_ADD
3294 || r_type == R_TILEGX_IMM8_X1_TLS_ADD);
3295 int dest_begin = is_pipe0 ? 0 : 31;
3296 int src_begin;
3297 const bfd_byte *insn;
3298 const bfd_byte *mask = NULL;
3299
3300 if (is_tls_le)
3301 {
3302 /* 1. copy dest operand into the first source operand.
3303 2. change the opcode to "move". */
3304 src_begin = is_pipe0 ? 6 : 37;
3305 insn = is_X0X1 ? insn_move_X0X1 : insn_move_Y0Y1;
3306
3307 switch (r_type)
3308 {
3309 case R_TILEGX_IMM8_X0_TLS_ADD:
3310 mask = insn_mask_X0_no_dest_no_srca;
3311 break;
3312 case R_TILEGX_IMM8_X1_TLS_ADD:
3313 mask = insn_mask_X1_no_dest_no_srca;
3314 break;
3315 case R_TILEGX_IMM8_Y0_TLS_ADD:
3316 mask = insn_mask_Y0_no_dest_no_srca;
3317 break;
3318 case R_TILEGX_IMM8_Y1_TLS_ADD:
3319 mask = insn_mask_Y1_no_dest_no_srca;
3320 break;
3321 }
3322 }
3323 else
3324 {
3325 /* 1. copy dest operand into the second source operand.
3326 2. change the opcode to "add". */
3327 src_begin = is_pipe0 ? 12 : 43;
3328 if (ABI_64_P (output_bfd))
3329 insn = is_X0X1 ? insn_add_X0X1 : insn_add_Y0Y1;
3330 else
3331 insn = is_X0X1 ? insn_addx_X0X1 : insn_addx_Y0Y1;
3332
3333 switch (r_type)
3334 {
3335 case R_TILEGX_IMM8_X0_TLS_ADD:
3336 mask = insn_mask_X0_no_operand;
3337 break;
3338 case R_TILEGX_IMM8_X1_TLS_ADD:
3339 mask = insn_mask_X1_no_operand;
3340 break;
3341 case R_TILEGX_IMM8_Y0_TLS_ADD:
3342 mask = insn_mask_Y0_no_operand;
3343 break;
3344 case R_TILEGX_IMM8_Y1_TLS_ADD:
3345 mask = insn_mask_Y1_no_operand;
3346 break;
3347 }
3348 }
3349
3350 tilegx_copy_bits (contents + rel->r_offset, dest_begin,
3351 src_begin, 6);
3352 tilegx_replace_insn (contents + rel->r_offset, mask, insn);
3353
3354 continue;
3355 }
3356 else
3357 {
3358 const bfd_byte *mask = NULL;
3359 const bfd_byte *add_insn = NULL;
3360 bfd_boolean is_64bit = ABI_64_P (output_bfd);
3361
3362 switch (r_type)
3363 {
3364 case R_TILEGX_IMM8_X0_TLS_GD_ADD:
3365 add_insn = is_tls_iele
3366 ? (is_64bit ? insn_tls_ie_add_X0X1 : insn_tls_ie_addx_X0X1)
3367 : insn_tls_gd_add_X0X1;
3368 mask = insn_mask_X0_no_dest_no_srca;
3369 break;
3370 case R_TILEGX_IMM8_X1_TLS_GD_ADD:
3371 add_insn = is_tls_iele
3372 ? (is_64bit ? insn_tls_ie_add_X0X1 : insn_tls_ie_addx_X0X1)
3373 : insn_tls_gd_add_X0X1;
3374 mask = insn_mask_X1_no_dest_no_srca;
3375 break;
3376 case R_TILEGX_IMM8_Y0_TLS_GD_ADD:
3377 add_insn = is_tls_iele
3378 ? (is_64bit ? insn_tls_ie_add_Y0Y1 : insn_tls_ie_addx_Y0Y1)
3379 : insn_tls_gd_add_Y0Y1;
3380 mask = insn_mask_Y0_no_dest_no_srca;
3381 break;
3382 case R_TILEGX_IMM8_Y1_TLS_GD_ADD:
3383 add_insn = is_tls_iele
3384 ? (is_64bit ? insn_tls_ie_add_Y0Y1 : insn_tls_ie_addx_Y0Y1)
3385 : insn_tls_gd_add_Y0Y1;
3386 mask = insn_mask_Y1_no_dest_no_srca;
3387 break;
3388 }
3389
3390 tilegx_replace_insn (contents + rel->r_offset, mask, add_insn);
3391
3392 continue;
3393 }
3394 break;
3395 case R_TILEGX_TLS_IE_LOAD:
3396 if (!input_section->sec_flg0
3397 && !bfd_link_pic (info)
3398 && (h == NULL || h->dynindx == -1))
3399 {
3400 /* IE -> LE */
3401 tilegx_replace_insn (contents + rel->r_offset,
3402 insn_mask_X1_no_dest_no_srca,
3403 insn_move_X0X1);
3404 }
3405 else
3406 {
3407 /* IE -> IE */
3408 if (ABI_64_P (output_bfd))
3409 tilegx_replace_insn (contents + rel->r_offset,
3410 insn_mask_X1_no_dest_no_srca,
3411 insn_tls_ie_ld_X1);
3412 else
3413 tilegx_replace_insn (contents + rel->r_offset,
3414 insn_mask_X1_no_dest_no_srca,
3415 insn_tls_ie_ld4s_X1);
3416 }
3417 continue;
3418 break;
3419 default:
3420 break;
3421 }
3422
3423 switch (r_type)
3424 {
3425 case R_TILEGX_IMM16_X0_HW0_GOT:
3426 case R_TILEGX_IMM16_X1_HW0_GOT:
3427 case R_TILEGX_IMM16_X0_HW0_LAST_GOT:
3428 case R_TILEGX_IMM16_X1_HW0_LAST_GOT:
3429 case R_TILEGX_IMM16_X0_HW1_LAST_GOT:
3430 case R_TILEGX_IMM16_X1_HW1_LAST_GOT:
3431 /* Relocation is to the entry for this symbol in the global
3432 offset table. */
3433 if (htab->elf.sgot == NULL)
3434 abort ();
3435
3436 if (h != NULL)
3437 {
3438 bfd_boolean dyn;
3439
3440 off = h->got.offset;
3441 BFD_ASSERT (off != (bfd_vma) -1);
3442 dyn = elf_hash_table (info)->dynamic_sections_created;
3443
3444 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3445 bfd_link_pic (info),
3446 h)
3447 || (bfd_link_pic (info)
3448 && SYMBOL_REFERENCES_LOCAL (info, h)))
3449 {
3450 /* This is actually a static link, or it is a
3451 -Bsymbolic link and the symbol is defined
3452 locally, or the symbol was forced to be local
3453 because of a version file. We must initialize
3454 this entry in the global offset table. Since the
3455 offset must always be a multiple
3456 of 8 for 64-bit, we use the least significant bit
3457 to record whether we have initialized it already.
3458
3459 When doing a dynamic link, we create a .rela.got
3460 relocation entry to initialize the value. This
3461 is done in the finish_dynamic_symbol routine. */
3462 if ((off & 1) != 0)
3463 off &= ~1;
3464 else
3465 {
3466 TILEGX_ELF_PUT_WORD (htab, output_bfd, relocation,
3467 htab->elf.sgot->contents + off);
3468 h->got.offset |= 1;
3469 }
3470 }
3471 else
3472 unresolved_reloc = FALSE;
3473 }
3474 else
3475 {
3476 BFD_ASSERT (local_got_offsets != NULL
3477 && local_got_offsets[r_symndx] != (bfd_vma) -1);
3478
3479 off = local_got_offsets[r_symndx];
3480
3481 /* The offset must always be a multiple of 8 on 64-bit.
3482 We use the least significant bit to record
3483 whether we have already processed this entry. */
3484 if ((off & 1) != 0)
3485 off &= ~1;
3486 else
3487 {
3488 if (bfd_link_pic (info))
3489 {
3490 asection *s;
3491 Elf_Internal_Rela outrel;
3492
3493 /* We need to generate a R_TILEGX_RELATIVE reloc
3494 for the dynamic linker. */
3495 s = htab->elf.srelgot;
3496 BFD_ASSERT (s != NULL);
3497
3498 outrel.r_offset = (htab->elf.sgot->output_section->vma
3499 + htab->elf.sgot->output_offset
3500 + off);
3501 outrel.r_info =
3502 TILEGX_ELF_R_INFO (htab, NULL, 0, R_TILEGX_RELATIVE);
3503 outrel.r_addend = relocation;
3504 relocation = 0;
3505 tilegx_elf_append_rela (output_bfd, s, &outrel);
3506 }
3507
3508 TILEGX_ELF_PUT_WORD (htab, output_bfd, relocation,
3509 htab->elf.sgot->contents + off);
3510 local_got_offsets[r_symndx] |= 1;
3511 }
3512 }
3513 relocation = off - got_base;
3514 break;
3515
3516 case R_TILEGX_JUMPOFF_X1_PLT:
3517 case R_TILEGX_IMM16_X0_HW0_PLT_PCREL:
3518 case R_TILEGX_IMM16_X1_HW0_PLT_PCREL:
3519 case R_TILEGX_IMM16_X0_HW1_PLT_PCREL:
3520 case R_TILEGX_IMM16_X1_HW1_PLT_PCREL:
3521 case R_TILEGX_IMM16_X0_HW2_PLT_PCREL:
3522 case R_TILEGX_IMM16_X1_HW2_PLT_PCREL:
3523 case R_TILEGX_IMM16_X0_HW3_PLT_PCREL:
3524 case R_TILEGX_IMM16_X1_HW3_PLT_PCREL:
3525 case R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL:
3526 case R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL:
3527 case R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL:
3528 case R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL:
3529 case R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL:
3530 case R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL:
3531 /* Relocation is to the entry for this symbol in the
3532 procedure linkage table. */
3533 BFD_ASSERT (h != NULL);
3534
3535 if (h->plt.offset == (bfd_vma) -1 || htab->elf.splt == NULL)
3536 {
3537 /* We didn't make a PLT entry for this symbol. This
3538 happens when statically linking PIC code, or when
3539 using -Bsymbolic. */
3540 break;
3541 }
3542
3543 relocation = (htab->elf.splt->output_section->vma
3544 + htab->elf.splt->output_offset
3545 + h->plt.offset);
3546 unresolved_reloc = FALSE;
3547 break;
3548
3549 case R_TILEGX_64_PCREL:
3550 case R_TILEGX_32_PCREL:
3551 case R_TILEGX_16_PCREL:
3552 case R_TILEGX_8_PCREL:
3553 case R_TILEGX_IMM16_X0_HW0_PCREL:
3554 case R_TILEGX_IMM16_X1_HW0_PCREL:
3555 case R_TILEGX_IMM16_X0_HW1_PCREL:
3556 case R_TILEGX_IMM16_X1_HW1_PCREL:
3557 case R_TILEGX_IMM16_X0_HW2_PCREL:
3558 case R_TILEGX_IMM16_X1_HW2_PCREL:
3559 case R_TILEGX_IMM16_X0_HW3_PCREL:
3560 case R_TILEGX_IMM16_X1_HW3_PCREL:
3561 case R_TILEGX_IMM16_X0_HW0_LAST_PCREL:
3562 case R_TILEGX_IMM16_X1_HW0_LAST_PCREL:
3563 case R_TILEGX_IMM16_X0_HW1_LAST_PCREL:
3564 case R_TILEGX_IMM16_X1_HW1_LAST_PCREL:
3565 case R_TILEGX_IMM16_X0_HW2_LAST_PCREL:
3566 case R_TILEGX_IMM16_X1_HW2_LAST_PCREL:
3567 if (h != NULL
3568 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3569 break;
3570 /* Fall through. */
3571 case R_TILEGX_64:
3572 case R_TILEGX_32:
3573 case R_TILEGX_16:
3574 case R_TILEGX_8:
3575 case R_TILEGX_HW0:
3576 case R_TILEGX_HW1:
3577 case R_TILEGX_HW2:
3578 case R_TILEGX_HW3:
3579 case R_TILEGX_HW0_LAST:
3580 case R_TILEGX_HW1_LAST:
3581 case R_TILEGX_HW2_LAST:
3582 case R_TILEGX_COPY:
3583 case R_TILEGX_GLOB_DAT:
3584 case R_TILEGX_JMP_SLOT:
3585 case R_TILEGX_RELATIVE:
3586 case R_TILEGX_BROFF_X1:
3587 case R_TILEGX_JUMPOFF_X1:
3588 case R_TILEGX_IMM8_X0:
3589 case R_TILEGX_IMM8_Y0:
3590 case R_TILEGX_IMM8_X1:
3591 case R_TILEGX_IMM8_Y1:
3592 case R_TILEGX_DEST_IMM8_X1:
3593 case R_TILEGX_MT_IMM14_X1:
3594 case R_TILEGX_MF_IMM14_X1:
3595 case R_TILEGX_MMSTART_X0:
3596 case R_TILEGX_MMEND_X0:
3597 case R_TILEGX_SHAMT_X0:
3598 case R_TILEGX_SHAMT_X1:
3599 case R_TILEGX_SHAMT_Y0:
3600 case R_TILEGX_SHAMT_Y1:
3601 case R_TILEGX_IMM16_X0_HW0:
3602 case R_TILEGX_IMM16_X1_HW0:
3603 case R_TILEGX_IMM16_X0_HW1:
3604 case R_TILEGX_IMM16_X1_HW1:
3605 case R_TILEGX_IMM16_X0_HW2:
3606 case R_TILEGX_IMM16_X1_HW2:
3607 case R_TILEGX_IMM16_X0_HW3:
3608 case R_TILEGX_IMM16_X1_HW3:
3609 case R_TILEGX_IMM16_X0_HW0_LAST:
3610 case R_TILEGX_IMM16_X1_HW0_LAST:
3611 case R_TILEGX_IMM16_X0_HW1_LAST:
3612 case R_TILEGX_IMM16_X1_HW1_LAST:
3613 case R_TILEGX_IMM16_X0_HW2_LAST:
3614 case R_TILEGX_IMM16_X1_HW2_LAST:
3615 if ((input_section->flags & SEC_ALLOC) == 0)
3616 break;
3617
3618 if ((bfd_link_pic (info)
3619 && (h == NULL
3620 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3621 || h->root.type != bfd_link_hash_undefweak)
3622 && (! howto->pc_relative
3623 || !SYMBOL_CALLS_LOCAL (info, h)))
3624 || (!bfd_link_pic (info)
3625 && h != NULL
3626 && h->dynindx != -1
3627 && !h->non_got_ref
3628 && ((h->def_dynamic
3629 && !h->def_regular)
3630 || h->root.type == bfd_link_hash_undefweak
3631 || h->root.type == bfd_link_hash_undefined)))
3632 {
3633 Elf_Internal_Rela outrel;
3634 bfd_boolean skip, relocate = FALSE;
3635
3636 /* When generating a shared object, these relocations
3637 are copied into the output file to be resolved at run
3638 time. */
3639
3640 BFD_ASSERT (sreloc != NULL);
3641
3642 skip = FALSE;
3643
3644 outrel.r_offset =
3645 _bfd_elf_section_offset (output_bfd, info, input_section,
3646 rel->r_offset);
3647 if (outrel.r_offset == (bfd_vma) -1)
3648 skip = TRUE;
3649 else if (outrel.r_offset == (bfd_vma) -2)
3650 skip = TRUE, relocate = TRUE;
3651 outrel.r_offset += (input_section->output_section->vma
3652 + input_section->output_offset);
3653
3654 switch (r_type)
3655 {
3656 case R_TILEGX_64_PCREL:
3657 case R_TILEGX_32_PCREL:
3658 case R_TILEGX_16_PCREL:
3659 case R_TILEGX_8_PCREL:
3660 /* If the symbol is not dynamic, we should not keep
3661 a dynamic relocation. But an .rela.* slot has been
3662 allocated for it, output R_TILEGX_NONE.
3663 FIXME: Add code tracking needed dynamic relocs as
3664 e.g. i386 has. */
3665 if (h->dynindx == -1)
3666 skip = TRUE, relocate = TRUE;
3667 break;
3668 }
3669
3670 if (skip)
3671 memset (&outrel, 0, sizeof outrel);
3672 /* h->dynindx may be -1 if the symbol was marked to
3673 become local. */
3674 else if (h != NULL &&
3675 h->dynindx != -1
3676 && (! is_plt
3677 || !bfd_link_pic (info)
3678 || !SYMBOLIC_BIND (info, h)
3679 || !h->def_regular))
3680 {
3681 BFD_ASSERT (h->dynindx != -1);
3682 outrel.r_info = TILEGX_ELF_R_INFO (htab, rel, h->dynindx, r_type);
3683 outrel.r_addend = rel->r_addend;
3684 }
3685 else
3686 {
3687 if (r_type == R_TILEGX_32 || r_type == R_TILEGX_64)
3688 {
3689 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, 0,
3690 R_TILEGX_RELATIVE);
3691 outrel.r_addend = relocation + rel->r_addend;
3692 }
3693 else
3694 {
3695 long indx;
3696
3697 outrel.r_addend = relocation + rel->r_addend;
3698
3699 if (is_plt)
3700 sec = htab->elf.splt;
3701
3702 if (bfd_is_abs_section (sec))
3703 indx = 0;
3704 else if (sec == NULL || sec->owner == NULL)
3705 {
3706 bfd_set_error (bfd_error_bad_value);
3707 return FALSE;
3708 }
3709 else
3710 {
3711 asection *osec;
3712
3713 /* We are turning this relocation into one
3714 against a section symbol. It would be
3715 proper to subtract the symbol's value,
3716 osec->vma, from the emitted reloc addend,
3717 but ld.so expects buggy relocs. */
3718 osec = sec->output_section;
3719 indx = elf_section_data (osec)->dynindx;
3720
3721 if (indx == 0)
3722 {
3723 osec = htab->elf.text_index_section;
3724 indx = elf_section_data (osec)->dynindx;
3725 }
3726
3727 /* FIXME: we really should be able to link non-pic
3728 shared libraries. */
3729 if (indx == 0)
3730 {
3731 BFD_FAIL ();
3732 (*_bfd_error_handler)
3733 (_("%B: probably compiled without -fPIC?"),
3734 input_bfd);
3735 bfd_set_error (bfd_error_bad_value);
3736 return FALSE;
3737 }
3738 }
3739
3740 outrel.r_info = TILEGX_ELF_R_INFO (htab, rel, indx,
3741 r_type);
3742 }
3743 }
3744
3745 tilegx_elf_append_rela (output_bfd, sreloc, &outrel);
3746
3747 /* This reloc will be computed at runtime, so there's no
3748 need to do anything now. */
3749 if (! relocate)
3750 continue;
3751 }
3752 break;
3753
3754 case R_TILEGX_IMM16_X0_HW0_TLS_LE:
3755 case R_TILEGX_IMM16_X1_HW0_TLS_LE:
3756 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE:
3757 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE:
3758 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE:
3759 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE:
3760 if (bfd_link_pic (info))
3761 {
3762 Elf_Internal_Rela outrel;
3763 bfd_boolean skip;
3764
3765 BFD_ASSERT (sreloc != NULL);
3766 skip = FALSE;
3767 outrel.r_offset =
3768 _bfd_elf_section_offset (output_bfd, info, input_section,
3769 rel->r_offset);
3770 if (outrel.r_offset == (bfd_vma) -1)
3771 skip = TRUE;
3772 else if (outrel.r_offset == (bfd_vma) -2)
3773 skip = TRUE;
3774 outrel.r_offset += (input_section->output_section->vma
3775 + input_section->output_offset);
3776 if (skip)
3777 memset (&outrel, 0, sizeof outrel);
3778 else
3779 {
3780 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, 0, r_type);
3781 outrel.r_addend = relocation - dtpoff_base (info)
3782 + rel->r_addend;
3783 }
3784
3785 tilegx_elf_append_rela (output_bfd, sreloc, &outrel);
3786 continue;
3787 }
3788 relocation = tpoff (info, relocation);
3789 break;
3790
3791 case R_TILEGX_IMM16_X0_HW0_TLS_GD:
3792 case R_TILEGX_IMM16_X1_HW0_TLS_GD:
3793 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD:
3794 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD:
3795 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD:
3796 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD:
3797 case R_TILEGX_IMM16_X0_HW0_TLS_IE:
3798 case R_TILEGX_IMM16_X1_HW0_TLS_IE:
3799 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE:
3800 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE:
3801 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE:
3802 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE:
3803 r_type = tilegx_elf_tls_transition (info, r_type, h == NULL,
3804 input_section->sec_flg0);
3805 tls_type = GOT_UNKNOWN;
3806 if (h == NULL && local_got_offsets)
3807 tls_type =
3808 _bfd_tilegx_elf_local_got_tls_type (input_bfd) [r_symndx];
3809 else if (h != NULL)
3810 {
3811 tls_type = tilegx_elf_hash_entry(h)->tls_type;
3812 if (!bfd_link_pic (info)
3813 && h->dynindx == -1
3814 && tls_type == GOT_TLS_IE)
3815 r_type = (!input_section->sec_flg0
3816 ? tilegx_tls_translate_to_le (r_type)
3817 : tilegx_tls_translate_to_ie (r_type));
3818 }
3819
3820 if (tls_type == GOT_TLS_IE)
3821 r_type = tilegx_tls_translate_to_ie (r_type);
3822
3823 if (r_type == R_TILEGX_IMM16_X0_HW0_TLS_LE
3824 || r_type == R_TILEGX_IMM16_X1_HW0_TLS_LE
3825 || r_type == R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE
3826 || r_type == R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE
3827 || r_type == R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE
3828 || r_type == R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE)
3829 {
3830 relocation = tpoff (info, relocation);
3831 break;
3832 }
3833
3834 if (h != NULL)
3835 {
3836 off = h->got.offset;
3837 h->got.offset |= 1;
3838 }
3839 else
3840 {
3841 BFD_ASSERT (local_got_offsets != NULL);
3842 off = local_got_offsets[r_symndx];
3843 local_got_offsets[r_symndx] |= 1;
3844 }
3845
3846 if (htab->elf.sgot == NULL)
3847 abort ();
3848
3849 if ((off & 1) != 0)
3850 off &= ~1;
3851 else
3852 {
3853 Elf_Internal_Rela outrel;
3854 int indx = 0;
3855 bfd_boolean need_relocs = FALSE;
3856
3857 if (htab->elf.srelgot == NULL)
3858 abort ();
3859
3860 if (h != NULL)
3861 {
3862 bfd_boolean dyn;
3863 dyn = htab->elf.dynamic_sections_created;
3864
3865 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3866 bfd_link_pic (info),
3867 h)
3868 && (!bfd_link_pic (info)
3869 || !SYMBOL_REFERENCES_LOCAL (info, h)))
3870 {
3871 indx = h->dynindx;
3872 }
3873 }
3874
3875 /* The GOT entries have not been initialized yet. Do it
3876 now, and emit any relocations. */
3877 if ((bfd_link_pic (info) || indx != 0)
3878 && (h == NULL
3879 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3880 || h->root.type != bfd_link_hash_undefweak))
3881 need_relocs = TRUE;
3882
3883 switch (r_type)
3884 {
3885 case R_TILEGX_IMM16_X0_HW0_TLS_IE:
3886 case R_TILEGX_IMM16_X1_HW0_TLS_IE:
3887 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE:
3888 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE:
3889 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE:
3890 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE:
3891 if (need_relocs) {
3892 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0,
3893 htab->elf.sgot->contents + off);
3894 outrel.r_offset = (htab->elf.sgot->output_section->vma
3895 + htab->elf.sgot->output_offset + off);
3896 outrel.r_addend = 0;
3897 if (indx == 0)
3898 outrel.r_addend = relocation - dtpoff_base (info);
3899 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, indx,
3900 TILEGX_ELF_TPOFF_RELOC (htab));
3901 tilegx_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel);
3902 } else {
3903 TILEGX_ELF_PUT_WORD (htab, output_bfd,
3904 tpoff (info, relocation),
3905 htab->elf.sgot->contents + off);
3906 }
3907 break;
3908
3909 case R_TILEGX_IMM16_X0_HW0_TLS_GD:
3910 case R_TILEGX_IMM16_X1_HW0_TLS_GD:
3911 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD:
3912 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD:
3913 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD:
3914 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD:
3915 if (need_relocs) {
3916 outrel.r_offset = (htab->elf.sgot->output_section->vma
3917 + htab->elf.sgot->output_offset + off);
3918 outrel.r_addend = 0;
3919 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, indx,
3920 TILEGX_ELF_DTPMOD_RELOC (htab));
3921 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0,
3922 htab->elf.sgot->contents + off);
3923 tilegx_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel);
3924 if (indx == 0)
3925 {
3926 BFD_ASSERT (! unresolved_reloc);
3927 TILEGX_ELF_PUT_WORD (htab, output_bfd,
3928 relocation - dtpoff_base (info),
3929 (htab->elf.sgot->contents + off +
3930 TILEGX_ELF_WORD_BYTES (htab)));
3931 }
3932 else
3933 {
3934 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0,
3935 (htab->elf.sgot->contents + off +
3936 TILEGX_ELF_WORD_BYTES (htab)));
3937 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, indx,
3938 TILEGX_ELF_DTPOFF_RELOC (htab));
3939 outrel.r_offset += TILEGX_ELF_WORD_BYTES (htab);
3940 tilegx_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel);
3941 }
3942 }
3943
3944 else {
3945 /* If we are not emitting relocations for a
3946 general dynamic reference, then we must be in a
3947 static link or an executable link with the
3948 symbol binding locally. Mark it as belonging
3949 to module 1, the executable. */
3950 TILEGX_ELF_PUT_WORD (htab, output_bfd, 1,
3951 htab->elf.sgot->contents + off );
3952 TILEGX_ELF_PUT_WORD (htab, output_bfd,
3953 relocation - dtpoff_base (info),
3954 htab->elf.sgot->contents + off +
3955 TILEGX_ELF_WORD_BYTES (htab));
3956 }
3957 break;
3958 }
3959 }
3960
3961 if (off >= (bfd_vma) -2)
3962 abort ();
3963
3964 relocation = off - got_base;
3965 unresolved_reloc = FALSE;
3966 howto = tilegx_elf_howto_table + r_type;
3967 break;
3968
3969 default:
3970 break;
3971 }
3972
3973 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3974 because such sections are not SEC_ALLOC and thus ld.so will
3975 not process them. */
3976 if (unresolved_reloc
3977 && !((input_section->flags & SEC_DEBUGGING) != 0
3978 && h->def_dynamic)
3979 && _bfd_elf_section_offset (output_bfd, info, input_section,
3980 rel->r_offset) != (bfd_vma) -1)
3981 (*_bfd_error_handler)
3982 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3983 input_bfd,
3984 input_section,
3985 (long) rel->r_offset,
3986 howto->name,
3987 h->root.root.string);
3988
3989 r = bfd_reloc_continue;
3990
3991 /* Get the operand creation function, if any. */
3992 create_func = reloc_to_create_func[r_type];
3993 if (create_func == NULL)
3994 {
3995 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3996 contents, rel->r_offset,
3997 relocation, rel->r_addend);
3998 }
3999 else
4000 {
4001 if (howto->pc_relative)
4002 {
4003 relocation -=
4004 input_section->output_section->vma + input_section->output_offset;
4005 if (howto->pcrel_offset)
4006 relocation -= rel->r_offset;
4007 }
4008
4009 bfd_byte *data;
4010
4011 /* Add the relocation addend if any to the final target value */
4012 relocation += rel->r_addend;
4013
4014 /* Do basic range checking */
4015 r = bfd_check_overflow (howto->complain_on_overflow,
4016 howto->bitsize,
4017 howto->rightshift,
4018 TILEGX_ELF_WORD_BYTES (htab) * 8,
4019 relocation);
4020
4021 /*
4022 * Write the relocated value out into the raw section data.
4023 * Don't put a relocation out in the .rela section.
4024 */
4025 tilegx_bundle_bits mask = create_func(-1);
4026 tilegx_bundle_bits value = create_func(relocation >> howto->rightshift);
4027
4028 /* Only touch bytes while the mask is not 0, so we
4029 don't write to out of bounds memory if this is actually
4030 a 16-bit switch instruction. */
4031 for (data = contents + rel->r_offset; mask != 0; data++)
4032 {
4033 bfd_byte byte_mask = (bfd_byte)mask;
4034 *data = (*data & ~byte_mask) | ((bfd_byte)value & byte_mask);
4035 mask >>= 8;
4036 value >>= 8;
4037 }
4038 }
4039
4040 if (r != bfd_reloc_ok)
4041 {
4042 const char *msg = NULL;
4043
4044 switch (r)
4045 {
4046 case bfd_reloc_overflow:
4047 (*info->callbacks->reloc_overflow)
4048 (info, (h ? &h->root : NULL), name, howto->name,
4049 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
4050 break;
4051
4052 case bfd_reloc_undefined:
4053 (*info->callbacks->undefined_symbol)
4054 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
4055 break;
4056
4057 case bfd_reloc_outofrange:
4058 msg = _("internal error: out of range error");
4059 break;
4060
4061 case bfd_reloc_notsupported:
4062 msg = _("internal error: unsupported relocation error");
4063 break;
4064
4065 case bfd_reloc_dangerous:
4066 msg = _("internal error: dangerous relocation");
4067 break;
4068
4069 default:
4070 msg = _("internal error: unknown error");
4071 break;
4072 }
4073
4074 if (msg)
4075 (*info->callbacks->warning) (info, msg, name, input_bfd,
4076 input_section, rel->r_offset);
4077 }
4078 }
4079
4080 return TRUE;
4081 }
4082
4083 /* Finish up dynamic symbol handling. We set the contents of various
4084 dynamic sections here. */
4085
4086 bfd_boolean
tilegx_elf_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)4087 tilegx_elf_finish_dynamic_symbol (bfd *output_bfd,
4088 struct bfd_link_info *info,
4089 struct elf_link_hash_entry *h,
4090 Elf_Internal_Sym *sym)
4091 {
4092 struct tilegx_elf_link_hash_table *htab;
4093
4094 htab = tilegx_elf_hash_table (info);
4095 BFD_ASSERT (htab != NULL);
4096
4097 if (h->plt.offset != (bfd_vma) -1)
4098 {
4099 asection *splt;
4100 asection *srela;
4101 asection *sgotplt;
4102 Elf_Internal_Rela rela;
4103 bfd_byte *loc;
4104 bfd_vma r_offset;
4105 const struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
4106
4107
4108 int rela_index;
4109
4110 /* This symbol has an entry in the PLT. Set it up. */
4111
4112 BFD_ASSERT (h->dynindx != -1);
4113
4114 splt = htab->elf.splt;
4115 srela = htab->elf.srelplt;
4116 sgotplt = htab->elf.sgotplt;
4117
4118 if (splt == NULL || srela == NULL)
4119 abort ();
4120
4121 /* Fill in the entry in the procedure linkage table. */
4122 rela_index = tilegx_plt_entry_build (output_bfd, htab, splt, sgotplt,
4123 h->plt.offset, &r_offset);
4124
4125 /* Fill in the entry in the global offset table, which initially points
4126 to the beginning of the plt. */
4127 TILEGX_ELF_PUT_WORD (htab, output_bfd,
4128 splt->output_section->vma + splt->output_offset,
4129 sgotplt->contents + r_offset);
4130
4131 /* Fill in the entry in the .rela.plt section. */
4132 rela.r_offset = (sgotplt->output_section->vma
4133 + sgotplt->output_offset
4134 + r_offset);
4135 rela.r_addend = 0;
4136 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, h->dynindx, R_TILEGX_JMP_SLOT);
4137
4138 loc = srela->contents + rela_index * TILEGX_ELF_RELA_BYTES (htab);
4139 bed->s->swap_reloca_out (output_bfd, &rela, loc);
4140
4141 if (!h->def_regular)
4142 {
4143 /* Mark the symbol as undefined, rather than as defined in
4144 the .plt section. Leave the value alone. */
4145 sym->st_shndx = SHN_UNDEF;
4146 /* If the symbol is weak, we do need to clear the value.
4147 Otherwise, the PLT entry would provide a definition for
4148 the symbol even if the symbol wasn't defined anywhere,
4149 and so the symbol would never be NULL. */
4150 if (!h->ref_regular_nonweak)
4151 sym->st_value = 0;
4152 }
4153 }
4154
4155 if (h->got.offset != (bfd_vma) -1
4156 && tilegx_elf_hash_entry(h)->tls_type != GOT_TLS_GD
4157 && tilegx_elf_hash_entry(h)->tls_type != GOT_TLS_IE)
4158 {
4159 asection *sgot;
4160 asection *srela;
4161 Elf_Internal_Rela rela;
4162
4163 /* This symbol has an entry in the GOT. Set it up. */
4164
4165 sgot = htab->elf.sgot;
4166 srela = htab->elf.srelgot;
4167 BFD_ASSERT (sgot != NULL && srela != NULL);
4168
4169 rela.r_offset = (sgot->output_section->vma
4170 + sgot->output_offset
4171 + (h->got.offset &~ (bfd_vma) 1));
4172
4173 /* If this is a -Bsymbolic link, and the symbol is defined
4174 locally, we just want to emit a RELATIVE reloc. Likewise if
4175 the symbol was forced to be local because of a version file.
4176 The entry in the global offset table will already have been
4177 initialized in the relocate_section function. */
4178 if (bfd_link_pic (info)
4179 && (info->symbolic || h->dynindx == -1)
4180 && h->def_regular)
4181 {
4182 asection *sec = h->root.u.def.section;
4183 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, 0, R_TILEGX_RELATIVE);
4184 rela.r_addend = (h->root.u.def.value
4185 + sec->output_section->vma
4186 + sec->output_offset);
4187 }
4188 else
4189 {
4190 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, h->dynindx, R_TILEGX_GLOB_DAT);
4191 rela.r_addend = 0;
4192 }
4193
4194 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0,
4195 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
4196 tilegx_elf_append_rela (output_bfd, srela, &rela);
4197 }
4198
4199 if (h->needs_copy)
4200 {
4201 asection *s;
4202 Elf_Internal_Rela rela;
4203
4204 /* This symbols needs a copy reloc. Set it up. */
4205 BFD_ASSERT (h->dynindx != -1);
4206
4207 s = htab->srelbss;
4208 BFD_ASSERT (s != NULL);
4209
4210 rela.r_offset = (h->root.u.def.value
4211 + h->root.u.def.section->output_section->vma
4212 + h->root.u.def.section->output_offset);
4213 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, h->dynindx, R_TILEGX_COPY);
4214 rela.r_addend = 0;
4215 tilegx_elf_append_rela (output_bfd, s, &rela);
4216 }
4217
4218 /* Mark some specially defined symbols as absolute. */
4219 if (h == htab->elf.hdynamic
4220 || (h == htab->elf.hgot || h == htab->elf.hplt))
4221 sym->st_shndx = SHN_ABS;
4222
4223 return TRUE;
4224 }
4225
4226 /* Finish up the dynamic sections. */
4227
4228 static bfd_boolean
tilegx_finish_dyn(bfd * output_bfd,struct bfd_link_info * info,bfd * dynobj,asection * sdyn,asection * splt ATTRIBUTE_UNUSED)4229 tilegx_finish_dyn (bfd *output_bfd, struct bfd_link_info *info,
4230 bfd *dynobj, asection *sdyn,
4231 asection *splt ATTRIBUTE_UNUSED)
4232 {
4233 struct tilegx_elf_link_hash_table *htab;
4234 const struct elf_backend_data *bed;
4235 bfd_byte *dyncon, *dynconend;
4236 size_t dynsize;
4237
4238 htab = tilegx_elf_hash_table (info);
4239 BFD_ASSERT (htab != NULL);
4240 bed = get_elf_backend_data (output_bfd);
4241 dynsize = bed->s->sizeof_dyn;
4242 dynconend = sdyn->contents + sdyn->size;
4243
4244 for (dyncon = sdyn->contents; dyncon < dynconend; dyncon += dynsize)
4245 {
4246 Elf_Internal_Dyn dyn;
4247 asection *s;
4248
4249 bed->s->swap_dyn_in (dynobj, dyncon, &dyn);
4250
4251 switch (dyn.d_tag)
4252 {
4253 case DT_PLTGOT:
4254 s = htab->elf.sgotplt;
4255 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4256 break;
4257 case DT_JMPREL:
4258 s = htab->elf.srelplt;
4259 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4260 break;
4261 case DT_PLTRELSZ:
4262 s = htab->elf.srelplt;
4263 dyn.d_un.d_val = s->size;
4264 break;
4265 default:
4266 continue;
4267 }
4268
4269 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon);
4270 }
4271 return TRUE;
4272 }
4273
4274 bfd_boolean
tilegx_elf_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)4275 tilegx_elf_finish_dynamic_sections (bfd *output_bfd,
4276 struct bfd_link_info *info)
4277 {
4278 bfd *dynobj;
4279 asection *sdyn;
4280 struct tilegx_elf_link_hash_table *htab;
4281 size_t pad_size;
4282
4283 htab = tilegx_elf_hash_table (info);
4284 BFD_ASSERT (htab != NULL);
4285 dynobj = htab->elf.dynobj;
4286
4287 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4288
4289 if (elf_hash_table (info)->dynamic_sections_created)
4290 {
4291 asection *splt;
4292 bfd_boolean ret;
4293
4294 splt = htab->elf.splt;
4295 BFD_ASSERT (splt != NULL && sdyn != NULL);
4296
4297 ret = tilegx_finish_dyn (output_bfd, info, dynobj, sdyn, splt);
4298
4299 if (ret != TRUE)
4300 return ret;
4301
4302 /* Fill in the head and tail entries in the procedure linkage table. */
4303 if (splt->size > 0)
4304 {
4305 memcpy (splt->contents,
4306 ABI_64_P (output_bfd) ?
4307 tilegx64_plt0_entry : tilegx32_plt0_entry,
4308 PLT_HEADER_SIZE);
4309
4310 memcpy (splt->contents + splt->size
4311 - PLT_ENTRY_SIZE + PLT_HEADER_SIZE,
4312 ABI_64_P (output_bfd) ?
4313 tilegx64_plt_tail_entry : tilegx32_plt_tail_entry,
4314 PLT_TAIL_SIZE);
4315 /* Add padding so that the plt section is a multiple of its
4316 entry size. */
4317 pad_size = PLT_ENTRY_SIZE - PLT_HEADER_SIZE - PLT_TAIL_SIZE;
4318 memset (splt->contents + splt->size - pad_size, 0, pad_size);
4319 }
4320
4321 elf_section_data (splt->output_section)->this_hdr.sh_entsize
4322 = PLT_ENTRY_SIZE;
4323 }
4324
4325 if (htab->elf.sgotplt)
4326 {
4327 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4328 {
4329 (*_bfd_error_handler)
4330 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4331 return FALSE;
4332 }
4333
4334 if (htab->elf.sgotplt->size > 0)
4335 {
4336 /* Write the first two entries in .got.plt, needed for the dynamic
4337 linker. */
4338 TILEGX_ELF_PUT_WORD (htab, output_bfd, (bfd_vma) -1,
4339 htab->elf.sgotplt->contents);
4340 TILEGX_ELF_PUT_WORD (htab, output_bfd, (bfd_vma) 0,
4341 htab->elf.sgotplt->contents
4342 + GOT_ENTRY_SIZE (htab));
4343 }
4344
4345 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
4346 GOT_ENTRY_SIZE (htab);
4347 }
4348
4349 if (htab->elf.sgot)
4350 {
4351 if (htab->elf.sgot->size > 0)
4352 {
4353 /* Set the first entry in the global offset table to the address of
4354 the dynamic section. */
4355 bfd_vma val = (sdyn ?
4356 sdyn->output_section->vma + sdyn->output_offset :
4357 0);
4358 TILEGX_ELF_PUT_WORD (htab, output_bfd, val,
4359 htab->elf.sgot->contents);
4360 }
4361
4362 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize =
4363 GOT_ENTRY_SIZE (htab);
4364 }
4365
4366 return TRUE;
4367 }
4368
4369
4370
4371 /* Return address for Ith PLT stub in section PLT, for relocation REL
4372 or (bfd_vma) -1 if it should not be included. */
4373
4374 bfd_vma
tilegx_elf_plt_sym_val(bfd_vma i,const asection * plt,const arelent * rel ATTRIBUTE_UNUSED)4375 tilegx_elf_plt_sym_val (bfd_vma i, const asection *plt,
4376 const arelent *rel ATTRIBUTE_UNUSED)
4377 {
4378 return plt->vma + PLT_HEADER_SIZE + i * PLT_ENTRY_SIZE;
4379 }
4380
4381 enum elf_reloc_type_class
tilegx_reloc_type_class(const struct bfd_link_info * info ATTRIBUTE_UNUSED,const asection * rel_sec ATTRIBUTE_UNUSED,const Elf_Internal_Rela * rela)4382 tilegx_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4383 const asection *rel_sec ATTRIBUTE_UNUSED,
4384 const Elf_Internal_Rela *rela)
4385 {
4386 switch ((int) TILEGX_ELF_R_TYPE (rela->r_info))
4387 {
4388 case R_TILEGX_RELATIVE:
4389 return reloc_class_relative;
4390 case R_TILEGX_JMP_SLOT:
4391 return reloc_class_plt;
4392 case R_TILEGX_COPY:
4393 return reloc_class_copy;
4394 default:
4395 return reloc_class_normal;
4396 }
4397 }
4398
4399 int
tilegx_additional_program_headers(bfd * abfd,struct bfd_link_info * info ATTRIBUTE_UNUSED)4400 tilegx_additional_program_headers (bfd *abfd,
4401 struct bfd_link_info *info ATTRIBUTE_UNUSED)
4402 {
4403 /* Each .intrpt section specified by the user adds another PT_LOAD
4404 header since the sections are discontiguous. */
4405 static const char intrpt_sections[4][9] =
4406 {
4407 ".intrpt0", ".intrpt1", ".intrpt2", ".intrpt3"
4408 };
4409 int count = 0;
4410 int i;
4411
4412 for (i = 0; i < 4; i++)
4413 {
4414 asection *sec = bfd_get_section_by_name (abfd, intrpt_sections[i]);
4415 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
4416 ++count;
4417 }
4418
4419 /* Add four "padding" headers in to leave room in case a custom linker
4420 script does something fancy. Otherwise ld complains that it ran
4421 out of program headers and refuses to link. */
4422 count += 4;
4423
4424 return count;
4425 }
4426
4427
4428 bfd_boolean
_bfd_tilegx_elf_merge_private_bfd_data(bfd * ibfd,bfd * obfd)4429 _bfd_tilegx_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4430 {
4431 const char *targ1 = bfd_get_target (ibfd);
4432 const char *targ2 = bfd_get_target (obfd);
4433
4434 if (strcmp (targ1, targ2) != 0)
4435 {
4436 (*_bfd_error_handler)
4437 (_("%B: Cannot link together %s and %s objects."),
4438 ibfd, targ1, targ2);
4439 bfd_set_error (bfd_error_bad_value);
4440 return FALSE;
4441 }
4442
4443 return TRUE;
4444 }
4445