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[thirdparty/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2018 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE(htab, h) \
72 ((4*4 \
73 + (h != NULL \
74 && h == htab->tls_get_addr \
75 && !htab->params->no_tls_get_addr_opt ? 8*4 : 0) \
76 + (1u << htab->params->plt_stub_align) - 1) \
77 & -(1u << htab->params->plt_stub_align))
78
79 /* VxWorks uses its own plt layout, filled in by the static linker. */
80
81 /* The standard VxWorks PLT entry. */
82 #define VXWORKS_PLT_ENTRY_SIZE 32
83 static const bfd_vma ppc_elf_vxworks_plt_entry
84 [VXWORKS_PLT_ENTRY_SIZE / 4] =
85 {
86 0x3d800000, /* lis r12,0 */
87 0x818c0000, /* lwz r12,0(r12) */
88 0x7d8903a6, /* mtctr r12 */
89 0x4e800420, /* bctr */
90 0x39600000, /* li r11,0 */
91 0x48000000, /* b 14 <.PLT0resolve+0x4> */
92 0x60000000, /* nop */
93 0x60000000, /* nop */
94 };
95 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
96 [VXWORKS_PLT_ENTRY_SIZE / 4] =
97 {
98 0x3d9e0000, /* addis r12,r30,0 */
99 0x818c0000, /* lwz r12,0(r12) */
100 0x7d8903a6, /* mtctr r12 */
101 0x4e800420, /* bctr */
102 0x39600000, /* li r11,0 */
103 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
104 0x60000000, /* nop */
105 0x60000000, /* nop */
106 };
107
108 /* The initial VxWorks PLT entry. */
109 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
110 static const bfd_vma ppc_elf_vxworks_plt0_entry
111 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
112 {
113 0x3d800000, /* lis r12,0 */
114 0x398c0000, /* addi r12,r12,0 */
115 0x800c0008, /* lwz r0,8(r12) */
116 0x7c0903a6, /* mtctr r0 */
117 0x818c0004, /* lwz r12,4(r12) */
118 0x4e800420, /* bctr */
119 0x60000000, /* nop */
120 0x60000000, /* nop */
121 };
122 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
123 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
124 {
125 0x819e0008, /* lwz r12,8(r30) */
126 0x7d8903a6, /* mtctr r12 */
127 0x819e0004, /* lwz r12,4(r30) */
128 0x4e800420, /* bctr */
129 0x60000000, /* nop */
130 0x60000000, /* nop */
131 0x60000000, /* nop */
132 0x60000000, /* nop */
133 };
134
135 /* For executables, we have some additional relocations in
136 .rela.plt.unloaded, for the kernel loader. */
137
138 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
139 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
140 /* The number of relocations in the PLTResolve slot. */
141 #define VXWORKS_PLTRESOLVE_RELOCS 2
142 /* The number of relocations in the PLTResolve slot when creating
143 a shared library. */
144 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
145
146 /* Some instructions. */
147 #define ADDIS_11_11 0x3d6b0000
148 #define ADDIS_11_30 0x3d7e0000
149 #define ADDIS_12_12 0x3d8c0000
150 #define ADDI_11_11 0x396b0000
151 #define ADD_0_11_11 0x7c0b5a14
152 #define ADD_3_12_2 0x7c6c1214
153 #define ADD_11_0_11 0x7d605a14
154 #define B 0x48000000
155 #define BA 0x48000002
156 #define BCL_20_31 0x429f0005
157 #define BCTR 0x4e800420
158 #define BEQLR 0x4d820020
159 #define CMPWI_11_0 0x2c0b0000
160 #define LIS_11 0x3d600000
161 #define LIS_12 0x3d800000
162 #define LWZU_0_12 0x840c0000
163 #define LWZ_0_12 0x800c0000
164 #define LWZ_11_3 0x81630000
165 #define LWZ_11_11 0x816b0000
166 #define LWZ_11_30 0x817e0000
167 #define LWZ_12_3 0x81830000
168 #define LWZ_12_12 0x818c0000
169 #define MR_0_3 0x7c601b78
170 #define MR_3_0 0x7c030378
171 #define MFLR_0 0x7c0802a6
172 #define MFLR_12 0x7d8802a6
173 #define MTCTR_0 0x7c0903a6
174 #define MTCTR_11 0x7d6903a6
175 #define MTLR_0 0x7c0803a6
176 #define NOP 0x60000000
177 #define SUB_11_11_12 0x7d6c5850
178
179 /* Offset of tp and dtp pointers from start of TLS block. */
180 #define TP_OFFSET 0x7000
181 #define DTP_OFFSET 0x8000
182
183 /* The value of a defined global symbol. */
184 #define SYM_VAL(SYM) \
185 ((SYM)->root.u.def.section->output_section->vma \
186 + (SYM)->root.u.def.section->output_offset \
187 + (SYM)->root.u.def.value)
188 \f
189 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
190
191 static reloc_howto_type ppc_elf_howto_raw[] = {
192 /* This reloc does nothing. */
193 HOWTO (R_PPC_NONE, /* type */
194 0, /* rightshift */
195 3, /* size (0 = byte, 1 = short, 2 = long) */
196 0, /* bitsize */
197 FALSE, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_dont, /* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_PPC_NONE", /* name */
202 FALSE, /* partial_inplace */
203 0, /* src_mask */
204 0, /* dst_mask */
205 FALSE), /* pcrel_offset */
206
207 /* A standard 32 bit relocation. */
208 HOWTO (R_PPC_ADDR32, /* type */
209 0, /* rightshift */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
211 32, /* bitsize */
212 FALSE, /* pc_relative */
213 0, /* bitpos */
214 complain_overflow_dont, /* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_PPC_ADDR32", /* name */
217 FALSE, /* partial_inplace */
218 0, /* src_mask */
219 0xffffffff, /* dst_mask */
220 FALSE), /* pcrel_offset */
221
222 /* An absolute 26 bit branch; the lower two bits must be zero.
223 FIXME: we don't check that, we just clear them. */
224 HOWTO (R_PPC_ADDR24, /* type */
225 0, /* rightshift */
226 2, /* size (0 = byte, 1 = short, 2 = long) */
227 26, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_signed, /* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR24", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0x3fffffc, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* A standard 16 bit relocation. */
239 HOWTO (R_PPC_ADDR16, /* type */
240 0, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_bitfield, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* A 16 bit relocation without overflow. */
254 HOWTO (R_PPC_ADDR16_LO, /* type */
255 0, /* rightshift */
256 1, /* size (0 = byte, 1 = short, 2 = long) */
257 16, /* bitsize */
258 FALSE, /* pc_relative */
259 0, /* bitpos */
260 complain_overflow_dont,/* complain_on_overflow */
261 bfd_elf_generic_reloc, /* special_function */
262 "R_PPC_ADDR16_LO", /* name */
263 FALSE, /* partial_inplace */
264 0, /* src_mask */
265 0xffff, /* dst_mask */
266 FALSE), /* pcrel_offset */
267
268 /* The high order 16 bits of an address. */
269 HOWTO (R_PPC_ADDR16_HI, /* type */
270 16, /* rightshift */
271 1, /* size (0 = byte, 1 = short, 2 = long) */
272 16, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC_ADDR16_HI", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0xffff, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* The high order 16 bits of an address, plus 1 if the contents of
284 the low 16 bits, treated as a signed number, is negative. */
285 HOWTO (R_PPC_ADDR16_HA, /* type */
286 16, /* rightshift */
287 1, /* size (0 = byte, 1 = short, 2 = long) */
288 16, /* bitsize */
289 FALSE, /* pc_relative */
290 0, /* bitpos */
291 complain_overflow_dont, /* complain_on_overflow */
292 ppc_elf_addr16_ha_reloc, /* special_function */
293 "R_PPC_ADDR16_HA", /* name */
294 FALSE, /* partial_inplace */
295 0, /* src_mask */
296 0xffff, /* dst_mask */
297 FALSE), /* pcrel_offset */
298
299 /* An absolute 16 bit branch; the lower two bits must be zero.
300 FIXME: we don't check that, we just clear them. */
301 HOWTO (R_PPC_ADDR14, /* type */
302 0, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 0, /* bitpos */
307 complain_overflow_signed, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_PPC_ADDR14", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0xfffc, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* An absolute 16 bit branch, for which bit 10 should be set to
316 indicate that the branch is expected to be taken. The lower two
317 bits must be zero. */
318 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
319 0, /* rightshift */
320 2, /* size (0 = byte, 1 = short, 2 = long) */
321 16, /* bitsize */
322 FALSE, /* pc_relative */
323 0, /* bitpos */
324 complain_overflow_signed, /* complain_on_overflow */
325 bfd_elf_generic_reloc, /* special_function */
326 "R_PPC_ADDR14_BRTAKEN",/* name */
327 FALSE, /* partial_inplace */
328 0, /* src_mask */
329 0xfffc, /* dst_mask */
330 FALSE), /* pcrel_offset */
331
332 /* An absolute 16 bit branch, for which bit 10 should be set to
333 indicate that the branch is not expected to be taken. The lower
334 two bits must be zero. */
335 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_ADDR14_BRNTAKEN",/* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* A relative 26 bit branch; the lower two bits must be zero. */
350 HOWTO (R_PPC_REL24, /* type */
351 0, /* rightshift */
352 2, /* size (0 = byte, 1 = short, 2 = long) */
353 26, /* bitsize */
354 TRUE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC_REL24", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0x3fffffc, /* dst_mask */
362 TRUE), /* pcrel_offset */
363
364 /* A relative 16 bit branch; the lower two bits must be zero. */
365 HOWTO (R_PPC_REL14, /* type */
366 0, /* rightshift */
367 2, /* size (0 = byte, 1 = short, 2 = long) */
368 16, /* bitsize */
369 TRUE, /* pc_relative */
370 0, /* bitpos */
371 complain_overflow_signed, /* complain_on_overflow */
372 bfd_elf_generic_reloc, /* special_function */
373 "R_PPC_REL14", /* name */
374 FALSE, /* partial_inplace */
375 0, /* src_mask */
376 0xfffc, /* dst_mask */
377 TRUE), /* pcrel_offset */
378
379 /* A relative 16 bit branch. Bit 10 should be set to indicate that
380 the branch is expected to be taken. The lower two bits must be
381 zero. */
382 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 TRUE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_PPC_REL14_BRTAKEN", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0xfffc, /* dst_mask */
394 TRUE), /* pcrel_offset */
395
396 /* A relative 16 bit branch. Bit 10 should be set to indicate that
397 the branch is not expected to be taken. The lower two bits must
398 be zero. */
399 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 TRUE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 bfd_elf_generic_reloc, /* special_function */
407 "R_PPC_REL14_BRNTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0xfffc, /* dst_mask */
411 TRUE), /* pcrel_offset */
412
413 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
414 symbol. */
415 HOWTO (R_PPC_GOT16, /* type */
416 0, /* rightshift */
417 1, /* size (0 = byte, 1 = short, 2 = long) */
418 16, /* bitsize */
419 FALSE, /* pc_relative */
420 0, /* bitpos */
421 complain_overflow_signed, /* complain_on_overflow */
422 ppc_elf_unhandled_reloc, /* special_function */
423 "R_PPC_GOT16", /* name */
424 FALSE, /* partial_inplace */
425 0, /* src_mask */
426 0xffff, /* dst_mask */
427 FALSE), /* pcrel_offset */
428
429 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
430 the symbol. */
431 HOWTO (R_PPC_GOT16_LO, /* type */
432 0, /* rightshift */
433 1, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 FALSE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_dont, /* complain_on_overflow */
438 ppc_elf_unhandled_reloc, /* special_function */
439 "R_PPC_GOT16_LO", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0xffff, /* dst_mask */
443 FALSE), /* pcrel_offset */
444
445 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
446 the symbol. */
447 HOWTO (R_PPC_GOT16_HI, /* type */
448 16, /* rightshift */
449 1, /* size (0 = byte, 1 = short, 2 = long) */
450 16, /* bitsize */
451 FALSE, /* pc_relative */
452 0, /* bitpos */
453 complain_overflow_dont, /* complain_on_overflow */
454 ppc_elf_unhandled_reloc, /* special_function */
455 "R_PPC_GOT16_HI", /* name */
456 FALSE, /* partial_inplace */
457 0, /* src_mask */
458 0xffff, /* dst_mask */
459 FALSE), /* pcrel_offset */
460
461 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
462 the symbol. */
463 HOWTO (R_PPC_GOT16_HA, /* type */
464 16, /* rightshift */
465 1, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 FALSE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_dont, /* complain_on_overflow */
470 ppc_elf_unhandled_reloc, /* special_function */
471 "R_PPC_GOT16_HA", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0xffff, /* dst_mask */
475 FALSE), /* pcrel_offset */
476
477 /* Like R_PPC_REL24, but referring to the procedure linkage table
478 entry for the symbol. */
479 HOWTO (R_PPC_PLTREL24, /* type */
480 0, /* rightshift */
481 2, /* size (0 = byte, 1 = short, 2 = long) */
482 26, /* bitsize */
483 TRUE, /* pc_relative */
484 0, /* bitpos */
485 complain_overflow_signed, /* complain_on_overflow */
486 ppc_elf_unhandled_reloc, /* special_function */
487 "R_PPC_PLTREL24", /* name */
488 FALSE, /* partial_inplace */
489 0, /* src_mask */
490 0x3fffffc, /* dst_mask */
491 TRUE), /* pcrel_offset */
492
493 /* This is used only by the dynamic linker. The symbol should exist
494 both in the object being run and in some shared library. The
495 dynamic linker copies the data addressed by the symbol from the
496 shared library into the object, because the object being
497 run has to have the data at some particular address. */
498 HOWTO (R_PPC_COPY, /* type */
499 0, /* rightshift */
500 2, /* size (0 = byte, 1 = short, 2 = long) */
501 32, /* bitsize */
502 FALSE, /* pc_relative */
503 0, /* bitpos */
504 complain_overflow_dont, /* complain_on_overflow */
505 ppc_elf_unhandled_reloc, /* special_function */
506 "R_PPC_COPY", /* name */
507 FALSE, /* partial_inplace */
508 0, /* src_mask */
509 0, /* dst_mask */
510 FALSE), /* pcrel_offset */
511
512 /* Like R_PPC_ADDR32, but used when setting global offset table
513 entries. */
514 HOWTO (R_PPC_GLOB_DAT, /* type */
515 0, /* rightshift */
516 2, /* size (0 = byte, 1 = short, 2 = long) */
517 32, /* bitsize */
518 FALSE, /* pc_relative */
519 0, /* bitpos */
520 complain_overflow_dont, /* complain_on_overflow */
521 ppc_elf_unhandled_reloc, /* special_function */
522 "R_PPC_GLOB_DAT", /* name */
523 FALSE, /* partial_inplace */
524 0, /* src_mask */
525 0xffffffff, /* dst_mask */
526 FALSE), /* pcrel_offset */
527
528 /* Marks a procedure linkage table entry for a symbol. */
529 HOWTO (R_PPC_JMP_SLOT, /* type */
530 0, /* rightshift */
531 2, /* size (0 = byte, 1 = short, 2 = long) */
532 32, /* bitsize */
533 FALSE, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_dont, /* complain_on_overflow */
536 ppc_elf_unhandled_reloc, /* special_function */
537 "R_PPC_JMP_SLOT", /* name */
538 FALSE, /* partial_inplace */
539 0, /* src_mask */
540 0, /* dst_mask */
541 FALSE), /* pcrel_offset */
542
543 /* Used only by the dynamic linker. When the object is run, this
544 longword is set to the load address of the object, plus the
545 addend. */
546 HOWTO (R_PPC_RELATIVE, /* type */
547 0, /* rightshift */
548 2, /* size (0 = byte, 1 = short, 2 = long) */
549 32, /* bitsize */
550 FALSE, /* pc_relative */
551 0, /* bitpos */
552 complain_overflow_dont, /* complain_on_overflow */
553 bfd_elf_generic_reloc, /* special_function */
554 "R_PPC_RELATIVE", /* name */
555 FALSE, /* partial_inplace */
556 0, /* src_mask */
557 0xffffffff, /* dst_mask */
558 FALSE), /* pcrel_offset */
559
560 /* Like R_PPC_REL24, but uses the value of the symbol within the
561 object rather than the final value. Normally used for
562 _GLOBAL_OFFSET_TABLE_. */
563 HOWTO (R_PPC_LOCAL24PC, /* type */
564 0, /* rightshift */
565 2, /* size (0 = byte, 1 = short, 2 = long) */
566 26, /* bitsize */
567 TRUE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_signed, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_LOCAL24PC", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0x3fffffc, /* dst_mask */
575 TRUE), /* pcrel_offset */
576
577 /* Like R_PPC_ADDR32, but may be unaligned. */
578 HOWTO (R_PPC_UADDR32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 FALSE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_dont, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_UADDR32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 FALSE), /* pcrel_offset */
591
592 /* Like R_PPC_ADDR16, but may be unaligned. */
593 HOWTO (R_PPC_UADDR16, /* type */
594 0, /* rightshift */
595 1, /* size (0 = byte, 1 = short, 2 = long) */
596 16, /* bitsize */
597 FALSE, /* pc_relative */
598 0, /* bitpos */
599 complain_overflow_bitfield, /* complain_on_overflow */
600 bfd_elf_generic_reloc, /* special_function */
601 "R_PPC_UADDR16", /* name */
602 FALSE, /* partial_inplace */
603 0, /* src_mask */
604 0xffff, /* dst_mask */
605 FALSE), /* pcrel_offset */
606
607 /* 32-bit PC relative */
608 HOWTO (R_PPC_REL32, /* type */
609 0, /* rightshift */
610 2, /* size (0 = byte, 1 = short, 2 = long) */
611 32, /* bitsize */
612 TRUE, /* pc_relative */
613 0, /* bitpos */
614 complain_overflow_dont, /* complain_on_overflow */
615 bfd_elf_generic_reloc, /* special_function */
616 "R_PPC_REL32", /* name */
617 FALSE, /* partial_inplace */
618 0, /* src_mask */
619 0xffffffff, /* dst_mask */
620 TRUE), /* pcrel_offset */
621
622 /* 32-bit relocation to the symbol's procedure linkage table.
623 FIXME: not supported. */
624 HOWTO (R_PPC_PLT32, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_dont, /* complain_on_overflow */
631 ppc_elf_unhandled_reloc, /* special_function */
632 "R_PPC_PLT32", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
639 FIXME: not supported. */
640 HOWTO (R_PPC_PLTREL32, /* type */
641 0, /* rightshift */
642 2, /* size (0 = byte, 1 = short, 2 = long) */
643 32, /* bitsize */
644 TRUE, /* pc_relative */
645 0, /* bitpos */
646 complain_overflow_dont, /* complain_on_overflow */
647 ppc_elf_unhandled_reloc, /* special_function */
648 "R_PPC_PLTREL32", /* name */
649 FALSE, /* partial_inplace */
650 0, /* src_mask */
651 0, /* dst_mask */
652 TRUE), /* pcrel_offset */
653
654 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
655 the symbol. */
656 HOWTO (R_PPC_PLT16_LO, /* type */
657 0, /* rightshift */
658 1, /* size (0 = byte, 1 = short, 2 = long) */
659 16, /* bitsize */
660 FALSE, /* pc_relative */
661 0, /* bitpos */
662 complain_overflow_dont, /* complain_on_overflow */
663 ppc_elf_unhandled_reloc, /* special_function */
664 "R_PPC_PLT16_LO", /* name */
665 FALSE, /* partial_inplace */
666 0, /* src_mask */
667 0xffff, /* dst_mask */
668 FALSE), /* pcrel_offset */
669
670 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
671 the symbol. */
672 HOWTO (R_PPC_PLT16_HI, /* type */
673 16, /* rightshift */
674 1, /* size (0 = byte, 1 = short, 2 = long) */
675 16, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_dont, /* complain_on_overflow */
679 ppc_elf_unhandled_reloc, /* special_function */
680 "R_PPC_PLT16_HI", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
687 the symbol. */
688 HOWTO (R_PPC_PLT16_HA, /* type */
689 16, /* rightshift */
690 1, /* size (0 = byte, 1 = short, 2 = long) */
691 16, /* bitsize */
692 FALSE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_dont, /* complain_on_overflow */
695 ppc_elf_unhandled_reloc, /* special_function */
696 "R_PPC_PLT16_HA", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffff, /* dst_mask */
700 FALSE), /* pcrel_offset */
701
702 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
703 small data items. */
704 HOWTO (R_PPC_SDAREL16, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_signed, /* complain_on_overflow */
711 ppc_elf_unhandled_reloc, /* special_function */
712 "R_PPC_SDAREL16", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit section relative relocation. */
719 HOWTO (R_PPC_SECTOFF, /* type */
720 0, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_signed, /* complain_on_overflow */
726 ppc_elf_unhandled_reloc, /* special_function */
727 "R_PPC_SECTOFF", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit lower half section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_LO, /* type */
735 0, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_dont, /* complain_on_overflow */
741 ppc_elf_unhandled_reloc, /* special_function */
742 "R_PPC_SECTOFF_LO", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* 16-bit upper half section relative relocation. */
749 HOWTO (R_PPC_SECTOFF_HI, /* type */
750 16, /* rightshift */
751 1, /* size (0 = byte, 1 = short, 2 = long) */
752 16, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 ppc_elf_unhandled_reloc, /* special_function */
757 "R_PPC_SECTOFF_HI", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0xffff, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* 16-bit upper half adjusted section relative relocation. */
764 HOWTO (R_PPC_SECTOFF_HA, /* type */
765 16, /* rightshift */
766 1, /* size (0 = byte, 1 = short, 2 = long) */
767 16, /* bitsize */
768 FALSE, /* pc_relative */
769 0, /* bitpos */
770 complain_overflow_dont, /* complain_on_overflow */
771 ppc_elf_unhandled_reloc, /* special_function */
772 "R_PPC_SECTOFF_HA", /* name */
773 FALSE, /* partial_inplace */
774 0, /* src_mask */
775 0xffff, /* dst_mask */
776 FALSE), /* pcrel_offset */
777
778 /* Marker relocs for TLS. */
779 HOWTO (R_PPC_TLS,
780 0, /* rightshift */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
782 32, /* bitsize */
783 FALSE, /* pc_relative */
784 0, /* bitpos */
785 complain_overflow_dont, /* complain_on_overflow */
786 bfd_elf_generic_reloc, /* special_function */
787 "R_PPC_TLS", /* name */
788 FALSE, /* partial_inplace */
789 0, /* src_mask */
790 0, /* dst_mask */
791 FALSE), /* pcrel_offset */
792
793 HOWTO (R_PPC_TLSGD,
794 0, /* rightshift */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
796 32, /* bitsize */
797 FALSE, /* pc_relative */
798 0, /* bitpos */
799 complain_overflow_dont, /* complain_on_overflow */
800 bfd_elf_generic_reloc, /* special_function */
801 "R_PPC_TLSGD", /* name */
802 FALSE, /* partial_inplace */
803 0, /* src_mask */
804 0, /* dst_mask */
805 FALSE), /* pcrel_offset */
806
807 HOWTO (R_PPC_TLSLD,
808 0, /* rightshift */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
810 32, /* bitsize */
811 FALSE, /* pc_relative */
812 0, /* bitpos */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 "R_PPC_TLSLD", /* name */
816 FALSE, /* partial_inplace */
817 0, /* src_mask */
818 0, /* dst_mask */
819 FALSE), /* pcrel_offset */
820
821 /* Computes the load module index of the load module that contains the
822 definition of its TLS sym. */
823 HOWTO (R_PPC_DTPMOD32,
824 0, /* rightshift */
825 2, /* size (0 = byte, 1 = short, 2 = long) */
826 32, /* bitsize */
827 FALSE, /* pc_relative */
828 0, /* bitpos */
829 complain_overflow_dont, /* complain_on_overflow */
830 ppc_elf_unhandled_reloc, /* special_function */
831 "R_PPC_DTPMOD32", /* name */
832 FALSE, /* partial_inplace */
833 0, /* src_mask */
834 0xffffffff, /* dst_mask */
835 FALSE), /* pcrel_offset */
836
837 /* Computes a dtv-relative displacement, the difference between the value
838 of sym+add and the base address of the thread-local storage block that
839 contains the definition of sym, minus 0x8000. */
840 HOWTO (R_PPC_DTPREL32,
841 0, /* rightshift */
842 2, /* size (0 = byte, 1 = short, 2 = long) */
843 32, /* bitsize */
844 FALSE, /* pc_relative */
845 0, /* bitpos */
846 complain_overflow_dont, /* complain_on_overflow */
847 ppc_elf_unhandled_reloc, /* special_function */
848 "R_PPC_DTPREL32", /* name */
849 FALSE, /* partial_inplace */
850 0, /* src_mask */
851 0xffffffff, /* dst_mask */
852 FALSE), /* pcrel_offset */
853
854 /* A 16 bit dtprel reloc. */
855 HOWTO (R_PPC_DTPREL16,
856 0, /* rightshift */
857 1, /* size (0 = byte, 1 = short, 2 = long) */
858 16, /* bitsize */
859 FALSE, /* pc_relative */
860 0, /* bitpos */
861 complain_overflow_signed, /* complain_on_overflow */
862 ppc_elf_unhandled_reloc, /* special_function */
863 "R_PPC_DTPREL16", /* name */
864 FALSE, /* partial_inplace */
865 0, /* src_mask */
866 0xffff, /* dst_mask */
867 FALSE), /* pcrel_offset */
868
869 /* Like DTPREL16, but no overflow. */
870 HOWTO (R_PPC_DTPREL16_LO,
871 0, /* rightshift */
872 1, /* size (0 = byte, 1 = short, 2 = long) */
873 16, /* bitsize */
874 FALSE, /* pc_relative */
875 0, /* bitpos */
876 complain_overflow_dont, /* complain_on_overflow */
877 ppc_elf_unhandled_reloc, /* special_function */
878 "R_PPC_DTPREL16_LO", /* name */
879 FALSE, /* partial_inplace */
880 0, /* src_mask */
881 0xffff, /* dst_mask */
882 FALSE), /* pcrel_offset */
883
884 /* Like DTPREL16_LO, but next higher group of 16 bits. */
885 HOWTO (R_PPC_DTPREL16_HI,
886 16, /* rightshift */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_dont, /* complain_on_overflow */
892 ppc_elf_unhandled_reloc, /* special_function */
893 "R_PPC_DTPREL16_HI", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* Like DTPREL16_HI, but adjust for low 16 bits. */
900 HOWTO (R_PPC_DTPREL16_HA,
901 16, /* rightshift */
902 1, /* size (0 = byte, 1 = short, 2 = long) */
903 16, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_dont, /* complain_on_overflow */
907 ppc_elf_unhandled_reloc, /* special_function */
908 "R_PPC_DTPREL16_HA", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 0xffff, /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* Computes a tp-relative displacement, the difference between the value of
915 sym+add and the value of the thread pointer (r13). */
916 HOWTO (R_PPC_TPREL32,
917 0, /* rightshift */
918 2, /* size (0 = byte, 1 = short, 2 = long) */
919 32, /* bitsize */
920 FALSE, /* pc_relative */
921 0, /* bitpos */
922 complain_overflow_dont, /* complain_on_overflow */
923 ppc_elf_unhandled_reloc, /* special_function */
924 "R_PPC_TPREL32", /* name */
925 FALSE, /* partial_inplace */
926 0, /* src_mask */
927 0xffffffff, /* dst_mask */
928 FALSE), /* pcrel_offset */
929
930 /* A 16 bit tprel reloc. */
931 HOWTO (R_PPC_TPREL16,
932 0, /* rightshift */
933 1, /* size (0 = byte, 1 = short, 2 = long) */
934 16, /* bitsize */
935 FALSE, /* pc_relative */
936 0, /* bitpos */
937 complain_overflow_signed, /* complain_on_overflow */
938 ppc_elf_unhandled_reloc, /* special_function */
939 "R_PPC_TPREL16", /* name */
940 FALSE, /* partial_inplace */
941 0, /* src_mask */
942 0xffff, /* dst_mask */
943 FALSE), /* pcrel_offset */
944
945 /* Like TPREL16, but no overflow. */
946 HOWTO (R_PPC_TPREL16_LO,
947 0, /* rightshift */
948 1, /* size (0 = byte, 1 = short, 2 = long) */
949 16, /* bitsize */
950 FALSE, /* pc_relative */
951 0, /* bitpos */
952 complain_overflow_dont, /* complain_on_overflow */
953 ppc_elf_unhandled_reloc, /* special_function */
954 "R_PPC_TPREL16_LO", /* name */
955 FALSE, /* partial_inplace */
956 0, /* src_mask */
957 0xffff, /* dst_mask */
958 FALSE), /* pcrel_offset */
959
960 /* Like TPREL16_LO, but next higher group of 16 bits. */
961 HOWTO (R_PPC_TPREL16_HI,
962 16, /* rightshift */
963 1, /* size (0 = byte, 1 = short, 2 = long) */
964 16, /* bitsize */
965 FALSE, /* pc_relative */
966 0, /* bitpos */
967 complain_overflow_dont, /* complain_on_overflow */
968 ppc_elf_unhandled_reloc, /* special_function */
969 "R_PPC_TPREL16_HI", /* name */
970 FALSE, /* partial_inplace */
971 0, /* src_mask */
972 0xffff, /* dst_mask */
973 FALSE), /* pcrel_offset */
974
975 /* Like TPREL16_HI, but adjust for low 16 bits. */
976 HOWTO (R_PPC_TPREL16_HA,
977 16, /* rightshift */
978 1, /* size (0 = byte, 1 = short, 2 = long) */
979 16, /* bitsize */
980 FALSE, /* pc_relative */
981 0, /* bitpos */
982 complain_overflow_dont, /* complain_on_overflow */
983 ppc_elf_unhandled_reloc, /* special_function */
984 "R_PPC_TPREL16_HA", /* name */
985 FALSE, /* partial_inplace */
986 0, /* src_mask */
987 0xffff, /* dst_mask */
988 FALSE), /* pcrel_offset */
989
990 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
991 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
992 to the first entry. */
993 HOWTO (R_PPC_GOT_TLSGD16,
994 0, /* rightshift */
995 1, /* size (0 = byte, 1 = short, 2 = long) */
996 16, /* bitsize */
997 FALSE, /* pc_relative */
998 0, /* bitpos */
999 complain_overflow_signed, /* complain_on_overflow */
1000 ppc_elf_unhandled_reloc, /* special_function */
1001 "R_PPC_GOT_TLSGD16", /* name */
1002 FALSE, /* partial_inplace */
1003 0, /* src_mask */
1004 0xffff, /* dst_mask */
1005 FALSE), /* pcrel_offset */
1006
1007 /* Like GOT_TLSGD16, but no overflow. */
1008 HOWTO (R_PPC_GOT_TLSGD16_LO,
1009 0, /* rightshift */
1010 1, /* size (0 = byte, 1 = short, 2 = long) */
1011 16, /* bitsize */
1012 FALSE, /* pc_relative */
1013 0, /* bitpos */
1014 complain_overflow_dont, /* complain_on_overflow */
1015 ppc_elf_unhandled_reloc, /* special_function */
1016 "R_PPC_GOT_TLSGD16_LO", /* name */
1017 FALSE, /* partial_inplace */
1018 0, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1021
1022 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1023 HOWTO (R_PPC_GOT_TLSGD16_HI,
1024 16, /* rightshift */
1025 1, /* size (0 = byte, 1 = short, 2 = long) */
1026 16, /* bitsize */
1027 FALSE, /* pc_relative */
1028 0, /* bitpos */
1029 complain_overflow_dont, /* complain_on_overflow */
1030 ppc_elf_unhandled_reloc, /* special_function */
1031 "R_PPC_GOT_TLSGD16_HI", /* name */
1032 FALSE, /* partial_inplace */
1033 0, /* src_mask */
1034 0xffff, /* dst_mask */
1035 FALSE), /* pcrel_offset */
1036
1037 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1038 HOWTO (R_PPC_GOT_TLSGD16_HA,
1039 16, /* rightshift */
1040 1, /* size (0 = byte, 1 = short, 2 = long) */
1041 16, /* bitsize */
1042 FALSE, /* pc_relative */
1043 0, /* bitpos */
1044 complain_overflow_dont, /* complain_on_overflow */
1045 ppc_elf_unhandled_reloc, /* special_function */
1046 "R_PPC_GOT_TLSGD16_HA", /* name */
1047 FALSE, /* partial_inplace */
1048 0, /* src_mask */
1049 0xffff, /* dst_mask */
1050 FALSE), /* pcrel_offset */
1051
1052 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1053 with values (sym+add)@dtpmod and zero, and computes the offset to the
1054 first entry. */
1055 HOWTO (R_PPC_GOT_TLSLD16,
1056 0, /* rightshift */
1057 1, /* size (0 = byte, 1 = short, 2 = long) */
1058 16, /* bitsize */
1059 FALSE, /* pc_relative */
1060 0, /* bitpos */
1061 complain_overflow_signed, /* complain_on_overflow */
1062 ppc_elf_unhandled_reloc, /* special_function */
1063 "R_PPC_GOT_TLSLD16", /* name */
1064 FALSE, /* partial_inplace */
1065 0, /* src_mask */
1066 0xffff, /* dst_mask */
1067 FALSE), /* pcrel_offset */
1068
1069 /* Like GOT_TLSLD16, but no overflow. */
1070 HOWTO (R_PPC_GOT_TLSLD16_LO,
1071 0, /* rightshift */
1072 1, /* size (0 = byte, 1 = short, 2 = long) */
1073 16, /* bitsize */
1074 FALSE, /* pc_relative */
1075 0, /* bitpos */
1076 complain_overflow_dont, /* complain_on_overflow */
1077 ppc_elf_unhandled_reloc, /* special_function */
1078 "R_PPC_GOT_TLSLD16_LO", /* name */
1079 FALSE, /* partial_inplace */
1080 0, /* src_mask */
1081 0xffff, /* dst_mask */
1082 FALSE), /* pcrel_offset */
1083
1084 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1085 HOWTO (R_PPC_GOT_TLSLD16_HI,
1086 16, /* rightshift */
1087 1, /* size (0 = byte, 1 = short, 2 = long) */
1088 16, /* bitsize */
1089 FALSE, /* pc_relative */
1090 0, /* bitpos */
1091 complain_overflow_dont, /* complain_on_overflow */
1092 ppc_elf_unhandled_reloc, /* special_function */
1093 "R_PPC_GOT_TLSLD16_HI", /* name */
1094 FALSE, /* partial_inplace */
1095 0, /* src_mask */
1096 0xffff, /* dst_mask */
1097 FALSE), /* pcrel_offset */
1098
1099 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1100 HOWTO (R_PPC_GOT_TLSLD16_HA,
1101 16, /* rightshift */
1102 1, /* size (0 = byte, 1 = short, 2 = long) */
1103 16, /* bitsize */
1104 FALSE, /* pc_relative */
1105 0, /* bitpos */
1106 complain_overflow_dont, /* complain_on_overflow */
1107 ppc_elf_unhandled_reloc, /* special_function */
1108 "R_PPC_GOT_TLSLD16_HA", /* name */
1109 FALSE, /* partial_inplace */
1110 0, /* src_mask */
1111 0xffff, /* dst_mask */
1112 FALSE), /* pcrel_offset */
1113
1114 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1115 the offset to the entry. */
1116 HOWTO (R_PPC_GOT_DTPREL16,
1117 0, /* rightshift */
1118 1, /* size (0 = byte, 1 = short, 2 = long) */
1119 16, /* bitsize */
1120 FALSE, /* pc_relative */
1121 0, /* bitpos */
1122 complain_overflow_signed, /* complain_on_overflow */
1123 ppc_elf_unhandled_reloc, /* special_function */
1124 "R_PPC_GOT_DTPREL16", /* name */
1125 FALSE, /* partial_inplace */
1126 0, /* src_mask */
1127 0xffff, /* dst_mask */
1128 FALSE), /* pcrel_offset */
1129
1130 /* Like GOT_DTPREL16, but no overflow. */
1131 HOWTO (R_PPC_GOT_DTPREL16_LO,
1132 0, /* rightshift */
1133 1, /* size (0 = byte, 1 = short, 2 = long) */
1134 16, /* bitsize */
1135 FALSE, /* pc_relative */
1136 0, /* bitpos */
1137 complain_overflow_dont, /* complain_on_overflow */
1138 ppc_elf_unhandled_reloc, /* special_function */
1139 "R_PPC_GOT_DTPREL16_LO", /* name */
1140 FALSE, /* partial_inplace */
1141 0, /* src_mask */
1142 0xffff, /* dst_mask */
1143 FALSE), /* pcrel_offset */
1144
1145 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1146 HOWTO (R_PPC_GOT_DTPREL16_HI,
1147 16, /* rightshift */
1148 1, /* size (0 = byte, 1 = short, 2 = long) */
1149 16, /* bitsize */
1150 FALSE, /* pc_relative */
1151 0, /* bitpos */
1152 complain_overflow_dont, /* complain_on_overflow */
1153 ppc_elf_unhandled_reloc, /* special_function */
1154 "R_PPC_GOT_DTPREL16_HI", /* name */
1155 FALSE, /* partial_inplace */
1156 0, /* src_mask */
1157 0xffff, /* dst_mask */
1158 FALSE), /* pcrel_offset */
1159
1160 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1161 HOWTO (R_PPC_GOT_DTPREL16_HA,
1162 16, /* rightshift */
1163 1, /* size (0 = byte, 1 = short, 2 = long) */
1164 16, /* bitsize */
1165 FALSE, /* pc_relative */
1166 0, /* bitpos */
1167 complain_overflow_dont, /* complain_on_overflow */
1168 ppc_elf_unhandled_reloc, /* special_function */
1169 "R_PPC_GOT_DTPREL16_HA", /* name */
1170 FALSE, /* partial_inplace */
1171 0, /* src_mask */
1172 0xffff, /* dst_mask */
1173 FALSE), /* pcrel_offset */
1174
1175 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1176 offset to the entry. */
1177 HOWTO (R_PPC_GOT_TPREL16,
1178 0, /* rightshift */
1179 1, /* size (0 = byte, 1 = short, 2 = long) */
1180 16, /* bitsize */
1181 FALSE, /* pc_relative */
1182 0, /* bitpos */
1183 complain_overflow_signed, /* complain_on_overflow */
1184 ppc_elf_unhandled_reloc, /* special_function */
1185 "R_PPC_GOT_TPREL16", /* name */
1186 FALSE, /* partial_inplace */
1187 0, /* src_mask */
1188 0xffff, /* dst_mask */
1189 FALSE), /* pcrel_offset */
1190
1191 /* Like GOT_TPREL16, but no overflow. */
1192 HOWTO (R_PPC_GOT_TPREL16_LO,
1193 0, /* rightshift */
1194 1, /* size (0 = byte, 1 = short, 2 = long) */
1195 16, /* bitsize */
1196 FALSE, /* pc_relative */
1197 0, /* bitpos */
1198 complain_overflow_dont, /* complain_on_overflow */
1199 ppc_elf_unhandled_reloc, /* special_function */
1200 "R_PPC_GOT_TPREL16_LO", /* name */
1201 FALSE, /* partial_inplace */
1202 0, /* src_mask */
1203 0xffff, /* dst_mask */
1204 FALSE), /* pcrel_offset */
1205
1206 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1207 HOWTO (R_PPC_GOT_TPREL16_HI,
1208 16, /* rightshift */
1209 1, /* size (0 = byte, 1 = short, 2 = long) */
1210 16, /* bitsize */
1211 FALSE, /* pc_relative */
1212 0, /* bitpos */
1213 complain_overflow_dont, /* complain_on_overflow */
1214 ppc_elf_unhandled_reloc, /* special_function */
1215 "R_PPC_GOT_TPREL16_HI", /* name */
1216 FALSE, /* partial_inplace */
1217 0, /* src_mask */
1218 0xffff, /* dst_mask */
1219 FALSE), /* pcrel_offset */
1220
1221 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1222 HOWTO (R_PPC_GOT_TPREL16_HA,
1223 16, /* rightshift */
1224 1, /* size (0 = byte, 1 = short, 2 = long) */
1225 16, /* bitsize */
1226 FALSE, /* pc_relative */
1227 0, /* bitpos */
1228 complain_overflow_dont, /* complain_on_overflow */
1229 ppc_elf_unhandled_reloc, /* special_function */
1230 "R_PPC_GOT_TPREL16_HA", /* name */
1231 FALSE, /* partial_inplace */
1232 0, /* src_mask */
1233 0xffff, /* dst_mask */
1234 FALSE), /* pcrel_offset */
1235
1236 /* The remaining relocs are from the Embedded ELF ABI, and are not
1237 in the SVR4 ELF ABI. */
1238
1239 /* 32 bit value resulting from the addend minus the symbol. */
1240 HOWTO (R_PPC_EMB_NADDR32, /* type */
1241 0, /* rightshift */
1242 2, /* size (0 = byte, 1 = short, 2 = long) */
1243 32, /* bitsize */
1244 FALSE, /* pc_relative */
1245 0, /* bitpos */
1246 complain_overflow_dont, /* complain_on_overflow */
1247 ppc_elf_unhandled_reloc, /* special_function */
1248 "R_PPC_EMB_NADDR32", /* name */
1249 FALSE, /* partial_inplace */
1250 0, /* src_mask */
1251 0xffffffff, /* dst_mask */
1252 FALSE), /* pcrel_offset */
1253
1254 /* 16 bit value resulting from the addend minus the symbol. */
1255 HOWTO (R_PPC_EMB_NADDR16, /* type */
1256 0, /* rightshift */
1257 1, /* size (0 = byte, 1 = short, 2 = long) */
1258 16, /* bitsize */
1259 FALSE, /* pc_relative */
1260 0, /* bitpos */
1261 complain_overflow_signed, /* complain_on_overflow */
1262 ppc_elf_unhandled_reloc, /* special_function */
1263 "R_PPC_EMB_NADDR16", /* name */
1264 FALSE, /* partial_inplace */
1265 0, /* src_mask */
1266 0xffff, /* dst_mask */
1267 FALSE), /* pcrel_offset */
1268
1269 /* 16 bit value resulting from the addend minus the symbol. */
1270 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1271 0, /* rightshift */
1272 1, /* size (0 = byte, 1 = short, 2 = long) */
1273 16, /* bitsize */
1274 FALSE, /* pc_relative */
1275 0, /* bitpos */
1276 complain_overflow_dont,/* complain_on_overflow */
1277 ppc_elf_unhandled_reloc, /* special_function */
1278 "R_PPC_EMB_ADDR16_LO", /* name */
1279 FALSE, /* partial_inplace */
1280 0, /* src_mask */
1281 0xffff, /* dst_mask */
1282 FALSE), /* pcrel_offset */
1283
1284 /* The high order 16 bits of the addend minus the symbol. */
1285 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1286 16, /* rightshift */
1287 1, /* size (0 = byte, 1 = short, 2 = long) */
1288 16, /* bitsize */
1289 FALSE, /* pc_relative */
1290 0, /* bitpos */
1291 complain_overflow_dont, /* complain_on_overflow */
1292 ppc_elf_unhandled_reloc, /* special_function */
1293 "R_PPC_EMB_NADDR16_HI", /* name */
1294 FALSE, /* partial_inplace */
1295 0, /* src_mask */
1296 0xffff, /* dst_mask */
1297 FALSE), /* pcrel_offset */
1298
1299 /* The high order 16 bits of the result of the addend minus the address,
1300 plus 1 if the contents of the low 16 bits, treated as a signed number,
1301 is negative. */
1302 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1303 16, /* rightshift */
1304 1, /* size (0 = byte, 1 = short, 2 = long) */
1305 16, /* bitsize */
1306 FALSE, /* pc_relative */
1307 0, /* bitpos */
1308 complain_overflow_dont, /* complain_on_overflow */
1309 ppc_elf_unhandled_reloc, /* special_function */
1310 "R_PPC_EMB_NADDR16_HA", /* name */
1311 FALSE, /* partial_inplace */
1312 0, /* src_mask */
1313 0xffff, /* dst_mask */
1314 FALSE), /* pcrel_offset */
1315
1316 /* 16 bit value resulting from allocating a 4 byte word to hold an
1317 address in the .sdata section, and returning the offset from
1318 _SDA_BASE_ for that relocation. */
1319 HOWTO (R_PPC_EMB_SDAI16, /* type */
1320 0, /* rightshift */
1321 1, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_signed, /* complain_on_overflow */
1326 ppc_elf_unhandled_reloc, /* special_function */
1327 "R_PPC_EMB_SDAI16", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* 16 bit value resulting from allocating a 4 byte word to hold an
1334 address in the .sdata2 section, and returning the offset from
1335 _SDA2_BASE_ for that relocation. */
1336 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1337 0, /* rightshift */
1338 1, /* size (0 = byte, 1 = short, 2 = long) */
1339 16, /* bitsize */
1340 FALSE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_signed, /* complain_on_overflow */
1343 ppc_elf_unhandled_reloc, /* special_function */
1344 "R_PPC_EMB_SDA2I16", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0xffff, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1351 small data items. */
1352 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1353 0, /* rightshift */
1354 1, /* size (0 = byte, 1 = short, 2 = long) */
1355 16, /* bitsize */
1356 FALSE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_signed, /* complain_on_overflow */
1359 ppc_elf_unhandled_reloc, /* special_function */
1360 "R_PPC_EMB_SDA2REL", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 0xffff, /* dst_mask */
1364 FALSE), /* pcrel_offset */
1365
1366 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1367 signed offset from the appropriate base, and filling in the register
1368 field with the appropriate register (0, 2, or 13). */
1369 HOWTO (R_PPC_EMB_SDA21, /* type */
1370 0, /* rightshift */
1371 2, /* size (0 = byte, 1 = short, 2 = long) */
1372 16, /* bitsize */
1373 FALSE, /* pc_relative */
1374 0, /* bitpos */
1375 complain_overflow_signed, /* complain_on_overflow */
1376 ppc_elf_unhandled_reloc, /* special_function */
1377 "R_PPC_EMB_SDA21", /* name */
1378 FALSE, /* partial_inplace */
1379 0, /* src_mask */
1380 0xffff, /* dst_mask */
1381 FALSE), /* pcrel_offset */
1382
1383 /* Relocation not handled: R_PPC_EMB_MRKREF */
1384 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1385 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1386 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1387 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1388 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1389
1390 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1391 in the 16 bit signed offset from the appropriate base, and filling in the
1392 register field with the appropriate register (0, 2, or 13). */
1393 HOWTO (R_PPC_EMB_RELSDA, /* type */
1394 0, /* rightshift */
1395 1, /* size (0 = byte, 1 = short, 2 = long) */
1396 16, /* bitsize */
1397 FALSE, /* pc_relative */
1398 0, /* bitpos */
1399 complain_overflow_signed, /* complain_on_overflow */
1400 ppc_elf_unhandled_reloc, /* special_function */
1401 "R_PPC_EMB_RELSDA", /* name */
1402 FALSE, /* partial_inplace */
1403 0, /* src_mask */
1404 0xffff, /* dst_mask */
1405 FALSE), /* pcrel_offset */
1406
1407 /* A relative 8 bit branch. */
1408 HOWTO (R_PPC_VLE_REL8, /* type */
1409 1, /* rightshift */
1410 1, /* size (0 = byte, 1 = short, 2 = long) */
1411 8, /* bitsize */
1412 TRUE, /* pc_relative */
1413 0, /* bitpos */
1414 complain_overflow_signed, /* complain_on_overflow */
1415 bfd_elf_generic_reloc, /* special_function */
1416 "R_PPC_VLE_REL8", /* name */
1417 FALSE, /* partial_inplace */
1418 0, /* src_mask */
1419 0xff, /* dst_mask */
1420 TRUE), /* pcrel_offset */
1421
1422 /* A relative 15 bit branch. */
1423 HOWTO (R_PPC_VLE_REL15, /* type */
1424 1, /* rightshift */
1425 2, /* size (0 = byte, 1 = short, 2 = long) */
1426 15, /* bitsize */
1427 TRUE, /* pc_relative */
1428 1, /* bitpos */
1429 complain_overflow_signed, /* complain_on_overflow */
1430 bfd_elf_generic_reloc, /* special_function */
1431 "R_PPC_VLE_REL15", /* name */
1432 FALSE, /* partial_inplace */
1433 0, /* src_mask */
1434 0xfffe, /* dst_mask */
1435 TRUE), /* pcrel_offset */
1436
1437 /* A relative 24 bit branch. */
1438 HOWTO (R_PPC_VLE_REL24, /* type */
1439 1, /* rightshift */
1440 2, /* size (0 = byte, 1 = short, 2 = long) */
1441 24, /* bitsize */
1442 TRUE, /* pc_relative */
1443 1, /* bitpos */
1444 complain_overflow_signed, /* complain_on_overflow */
1445 bfd_elf_generic_reloc, /* special_function */
1446 "R_PPC_VLE_REL24", /* name */
1447 FALSE, /* partial_inplace */
1448 0, /* src_mask */
1449 0x1fffffe, /* dst_mask */
1450 TRUE), /* pcrel_offset */
1451
1452 /* The 16 LSBS in split16a format. */
1453 HOWTO (R_PPC_VLE_LO16A, /* type */
1454 0, /* rightshift */
1455 2, /* size (0 = byte, 1 = short, 2 = long) */
1456 16, /* bitsize */
1457 FALSE, /* pc_relative */
1458 0, /* bitpos */
1459 complain_overflow_dont, /* complain_on_overflow */
1460 ppc_elf_unhandled_reloc, /* special_function */
1461 "R_PPC_VLE_LO16A", /* name */
1462 FALSE, /* partial_inplace */
1463 0, /* src_mask */
1464 0x1f07ff, /* dst_mask */
1465 FALSE), /* pcrel_offset */
1466
1467 /* The 16 LSBS in split16d format. */
1468 HOWTO (R_PPC_VLE_LO16D, /* type */
1469 0, /* rightshift */
1470 2, /* size (0 = byte, 1 = short, 2 = long) */
1471 16, /* bitsize */
1472 FALSE, /* pc_relative */
1473 0, /* bitpos */
1474 complain_overflow_dont, /* complain_on_overflow */
1475 ppc_elf_unhandled_reloc, /* special_function */
1476 "R_PPC_VLE_LO16D", /* name */
1477 FALSE, /* partial_inplace */
1478 0, /* src_mask */
1479 0x3e007ff, /* dst_mask */
1480 FALSE), /* pcrel_offset */
1481
1482 /* Bits 16-31 split16a format. */
1483 HOWTO (R_PPC_VLE_HI16A, /* type */
1484 16, /* rightshift */
1485 2, /* size (0 = byte, 1 = short, 2 = long) */
1486 16, /* bitsize */
1487 FALSE, /* pc_relative */
1488 0, /* bitpos */
1489 complain_overflow_dont, /* complain_on_overflow */
1490 ppc_elf_unhandled_reloc, /* special_function */
1491 "R_PPC_VLE_HI16A", /* name */
1492 FALSE, /* partial_inplace */
1493 0, /* src_mask */
1494 0x1f07ff, /* dst_mask */
1495 FALSE), /* pcrel_offset */
1496
1497 /* Bits 16-31 split16d format. */
1498 HOWTO (R_PPC_VLE_HI16D, /* type */
1499 16, /* rightshift */
1500 2, /* size (0 = byte, 1 = short, 2 = long) */
1501 16, /* bitsize */
1502 FALSE, /* pc_relative */
1503 0, /* bitpos */
1504 complain_overflow_dont, /* complain_on_overflow */
1505 ppc_elf_unhandled_reloc, /* special_function */
1506 "R_PPC_VLE_HI16D", /* name */
1507 FALSE, /* partial_inplace */
1508 0, /* src_mask */
1509 0x3e007ff, /* dst_mask */
1510 FALSE), /* pcrel_offset */
1511
1512 /* Bits 16-31 (High Adjusted) in split16a format. */
1513 HOWTO (R_PPC_VLE_HA16A, /* type */
1514 16, /* rightshift */
1515 2, /* size (0 = byte, 1 = short, 2 = long) */
1516 16, /* bitsize */
1517 FALSE, /* pc_relative */
1518 0, /* bitpos */
1519 complain_overflow_dont, /* complain_on_overflow */
1520 ppc_elf_unhandled_reloc, /* special_function */
1521 "R_PPC_VLE_HA16A", /* name */
1522 FALSE, /* partial_inplace */
1523 0, /* src_mask */
1524 0x1f07ff, /* dst_mask */
1525 FALSE), /* pcrel_offset */
1526
1527 /* Bits 16-31 (High Adjusted) in split16d format. */
1528 HOWTO (R_PPC_VLE_HA16D, /* type */
1529 16, /* rightshift */
1530 2, /* size (0 = byte, 1 = short, 2 = long) */
1531 16, /* bitsize */
1532 FALSE, /* pc_relative */
1533 0, /* bitpos */
1534 complain_overflow_dont, /* complain_on_overflow */
1535 ppc_elf_unhandled_reloc, /* special_function */
1536 "R_PPC_VLE_HA16D", /* name */
1537 FALSE, /* partial_inplace */
1538 0, /* src_mask */
1539 0x3e007ff, /* dst_mask */
1540 FALSE), /* pcrel_offset */
1541
1542 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1543 instructions. If the register base is 0 then the linker changes
1544 the e_add16i to an e_li instruction. */
1545 HOWTO (R_PPC_VLE_SDA21, /* type */
1546 0, /* rightshift */
1547 2, /* size (0 = byte, 1 = short, 2 = long) */
1548 16, /* bitsize */
1549 FALSE, /* pc_relative */
1550 0, /* bitpos */
1551 complain_overflow_signed, /* complain_on_overflow */
1552 ppc_elf_unhandled_reloc, /* special_function */
1553 "R_PPC_VLE_SDA21", /* name */
1554 FALSE, /* partial_inplace */
1555 0, /* src_mask */
1556 0xffff, /* dst_mask */
1557 FALSE), /* pcrel_offset */
1558
1559 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1560 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1561 0, /* rightshift */
1562 2, /* size (0 = byte, 1 = short, 2 = long) */
1563 16, /* bitsize */
1564 FALSE, /* pc_relative */
1565 0, /* bitpos */
1566 complain_overflow_dont, /* complain_on_overflow */
1567 ppc_elf_unhandled_reloc, /* special_function */
1568 "R_PPC_VLE_SDA21_LO", /* name */
1569 FALSE, /* partial_inplace */
1570 0, /* src_mask */
1571 0xffff, /* dst_mask */
1572 FALSE), /* pcrel_offset */
1573
1574 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1575 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1576 0, /* rightshift */
1577 2, /* size (0 = byte, 1 = short, 2 = long) */
1578 16, /* bitsize */
1579 FALSE, /* pc_relative */
1580 0, /* bitpos */
1581 complain_overflow_dont, /* complain_on_overflow */
1582 ppc_elf_unhandled_reloc, /* special_function */
1583 "R_PPC_VLE_SDAREL_LO16A", /* name */
1584 FALSE, /* partial_inplace */
1585 0, /* src_mask */
1586 0x1f07ff, /* dst_mask */
1587 FALSE), /* pcrel_offset */
1588
1589 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1590 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1591 0, /* rightshift */
1592 2, /* size (0 = byte, 1 = short, 2 = long) */
1593 16, /* bitsize */
1594 FALSE, /* pc_relative */
1595 0, /* bitpos */
1596 complain_overflow_dont, /* complain_on_overflow */
1597 ppc_elf_unhandled_reloc, /* special_function */
1598 "R_PPC_VLE_SDAREL_LO16D", /* name */
1599 FALSE, /* partial_inplace */
1600 0, /* src_mask */
1601 0x3e007ff, /* dst_mask */
1602 FALSE), /* pcrel_offset */
1603
1604 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1605 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1606 16, /* rightshift */
1607 2, /* size (0 = byte, 1 = short, 2 = long) */
1608 16, /* bitsize */
1609 FALSE, /* pc_relative */
1610 0, /* bitpos */
1611 complain_overflow_dont, /* complain_on_overflow */
1612 ppc_elf_unhandled_reloc, /* special_function */
1613 "R_PPC_VLE_SDAREL_HI16A", /* name */
1614 FALSE, /* partial_inplace */
1615 0, /* src_mask */
1616 0x1f07ff, /* dst_mask */
1617 FALSE), /* pcrel_offset */
1618
1619 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1620 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1621 16, /* rightshift */
1622 2, /* size (0 = byte, 1 = short, 2 = long) */
1623 16, /* bitsize */
1624 FALSE, /* pc_relative */
1625 0, /* bitpos */
1626 complain_overflow_dont, /* complain_on_overflow */
1627 ppc_elf_unhandled_reloc, /* special_function */
1628 "R_PPC_VLE_SDAREL_HI16D", /* name */
1629 FALSE, /* partial_inplace */
1630 0, /* src_mask */
1631 0x3e007ff, /* dst_mask */
1632 FALSE), /* pcrel_offset */
1633
1634 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1635 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1636 16, /* rightshift */
1637 2, /* size (0 = byte, 1 = short, 2 = long) */
1638 16, /* bitsize */
1639 FALSE, /* pc_relative */
1640 0, /* bitpos */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 ppc_elf_unhandled_reloc, /* special_function */
1643 "R_PPC_VLE_SDAREL_HA16A", /* name */
1644 FALSE, /* partial_inplace */
1645 0, /* src_mask */
1646 0x1f07ff, /* dst_mask */
1647 FALSE), /* pcrel_offset */
1648
1649 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1650 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1651 16, /* rightshift */
1652 2, /* size (0 = byte, 1 = short, 2 = long) */
1653 16, /* bitsize */
1654 FALSE, /* pc_relative */
1655 0, /* bitpos */
1656 complain_overflow_dont, /* complain_on_overflow */
1657 ppc_elf_unhandled_reloc, /* special_function */
1658 "R_PPC_VLE_SDAREL_HA16D", /* name */
1659 FALSE, /* partial_inplace */
1660 0, /* src_mask */
1661 0x3e007ff, /* dst_mask */
1662 FALSE), /* pcrel_offset */
1663
1664 /* e_li split20 format. */
1665 HOWTO (R_PPC_VLE_ADDR20, /* type */
1666 16, /* rightshift */
1667 2, /* size (0 = byte, 1 = short, 2 = long) */
1668 20, /* bitsize */
1669 FALSE, /* pc_relative */
1670 0, /* bitpos */
1671 complain_overflow_dont, /* complain_on_overflow */
1672 bfd_elf_generic_reloc, /* special_function */
1673 "R_PPC_VLE_ADDR20", /* name */
1674 FALSE, /* partial_inplace */
1675 0, /* src_mask */
1676 0x1f07ff, /* dst_mask */
1677 FALSE), /* pcrel_offset */
1678
1679 HOWTO (R_PPC_IRELATIVE, /* type */
1680 0, /* rightshift */
1681 2, /* size (0 = byte, 1 = short, 2 = long) */
1682 32, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc_elf_unhandled_reloc, /* special_function */
1687 "R_PPC_IRELATIVE", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0xffffffff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* A 16 bit relative relocation. */
1694 HOWTO (R_PPC_REL16, /* type */
1695 0, /* rightshift */
1696 1, /* size (0 = byte, 1 = short, 2 = long) */
1697 16, /* bitsize */
1698 TRUE, /* pc_relative */
1699 0, /* bitpos */
1700 complain_overflow_signed, /* complain_on_overflow */
1701 bfd_elf_generic_reloc, /* special_function */
1702 "R_PPC_REL16", /* name */
1703 FALSE, /* partial_inplace */
1704 0, /* src_mask */
1705 0xffff, /* dst_mask */
1706 TRUE), /* pcrel_offset */
1707
1708 /* A 16 bit relative relocation without overflow. */
1709 HOWTO (R_PPC_REL16_LO, /* type */
1710 0, /* rightshift */
1711 1, /* size (0 = byte, 1 = short, 2 = long) */
1712 16, /* bitsize */
1713 TRUE, /* pc_relative */
1714 0, /* bitpos */
1715 complain_overflow_dont,/* complain_on_overflow */
1716 bfd_elf_generic_reloc, /* special_function */
1717 "R_PPC_REL16_LO", /* name */
1718 FALSE, /* partial_inplace */
1719 0, /* src_mask */
1720 0xffff, /* dst_mask */
1721 TRUE), /* pcrel_offset */
1722
1723 /* The high order 16 bits of a relative address. */
1724 HOWTO (R_PPC_REL16_HI, /* type */
1725 16, /* rightshift */
1726 1, /* size (0 = byte, 1 = short, 2 = long) */
1727 16, /* bitsize */
1728 TRUE, /* pc_relative */
1729 0, /* bitpos */
1730 complain_overflow_dont, /* complain_on_overflow */
1731 bfd_elf_generic_reloc, /* special_function */
1732 "R_PPC_REL16_HI", /* name */
1733 FALSE, /* partial_inplace */
1734 0, /* src_mask */
1735 0xffff, /* dst_mask */
1736 TRUE), /* pcrel_offset */
1737
1738 /* The high order 16 bits of a relative address, plus 1 if the contents of
1739 the low 16 bits, treated as a signed number, is negative. */
1740 HOWTO (R_PPC_REL16_HA, /* type */
1741 16, /* rightshift */
1742 1, /* size (0 = byte, 1 = short, 2 = long) */
1743 16, /* bitsize */
1744 TRUE, /* pc_relative */
1745 0, /* bitpos */
1746 complain_overflow_dont, /* complain_on_overflow */
1747 ppc_elf_addr16_ha_reloc, /* special_function */
1748 "R_PPC_REL16_HA", /* name */
1749 FALSE, /* partial_inplace */
1750 0, /* src_mask */
1751 0xffff, /* dst_mask */
1752 TRUE), /* pcrel_offset */
1753
1754 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1755 HOWTO (R_PPC_REL16DX_HA, /* type */
1756 16, /* rightshift */
1757 2, /* size (0 = byte, 1 = short, 2 = long) */
1758 16, /* bitsize */
1759 TRUE, /* pc_relative */
1760 0, /* bitpos */
1761 complain_overflow_signed, /* complain_on_overflow */
1762 ppc_elf_addr16_ha_reloc, /* special_function */
1763 "R_PPC_REL16DX_HA", /* name */
1764 FALSE, /* partial_inplace */
1765 0, /* src_mask */
1766 0x1fffc1, /* dst_mask */
1767 TRUE), /* pcrel_offset */
1768
1769 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1770 HOWTO (R_PPC_16DX_HA, /* type */
1771 16, /* rightshift */
1772 2, /* size (0 = byte, 1 = short, 2 = long) */
1773 16, /* bitsize */
1774 FALSE, /* pc_relative */
1775 0, /* bitpos */
1776 complain_overflow_signed, /* complain_on_overflow */
1777 ppc_elf_addr16_ha_reloc, /* special_function */
1778 "R_PPC_16DX_HA", /* name */
1779 FALSE, /* partial_inplace */
1780 0, /* src_mask */
1781 0x1fffc1, /* dst_mask */
1782 FALSE), /* pcrel_offset */
1783
1784 /* GNU extension to record C++ vtable hierarchy. */
1785 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1786 0, /* rightshift */
1787 0, /* size (0 = byte, 1 = short, 2 = long) */
1788 0, /* bitsize */
1789 FALSE, /* pc_relative */
1790 0, /* bitpos */
1791 complain_overflow_dont, /* complain_on_overflow */
1792 NULL, /* special_function */
1793 "R_PPC_GNU_VTINHERIT", /* name */
1794 FALSE, /* partial_inplace */
1795 0, /* src_mask */
1796 0, /* dst_mask */
1797 FALSE), /* pcrel_offset */
1798
1799 /* GNU extension to record C++ vtable member usage. */
1800 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1801 0, /* rightshift */
1802 0, /* size (0 = byte, 1 = short, 2 = long) */
1803 0, /* bitsize */
1804 FALSE, /* pc_relative */
1805 0, /* bitpos */
1806 complain_overflow_dont, /* complain_on_overflow */
1807 NULL, /* special_function */
1808 "R_PPC_GNU_VTENTRY", /* name */
1809 FALSE, /* partial_inplace */
1810 0, /* src_mask */
1811 0, /* dst_mask */
1812 FALSE), /* pcrel_offset */
1813
1814 /* Phony reloc to handle AIX style TOC entries. */
1815 HOWTO (R_PPC_TOC16, /* type */
1816 0, /* rightshift */
1817 1, /* size (0 = byte, 1 = short, 2 = long) */
1818 16, /* bitsize */
1819 FALSE, /* pc_relative */
1820 0, /* bitpos */
1821 complain_overflow_signed, /* complain_on_overflow */
1822 ppc_elf_unhandled_reloc, /* special_function */
1823 "R_PPC_TOC16", /* name */
1824 FALSE, /* partial_inplace */
1825 0, /* src_mask */
1826 0xffff, /* dst_mask */
1827 FALSE), /* pcrel_offset */
1828 };
1829 \f
1830 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1831
1832 static void
1833 ppc_elf_howto_init (void)
1834 {
1835 unsigned int i, type;
1836
1837 for (i = 0;
1838 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1839 i++)
1840 {
1841 type = ppc_elf_howto_raw[i].type;
1842 if (type >= (sizeof (ppc_elf_howto_table)
1843 / sizeof (ppc_elf_howto_table[0])))
1844 abort ();
1845 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1846 }
1847 }
1848
1849 static reloc_howto_type *
1850 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1851 bfd_reloc_code_real_type code)
1852 {
1853 enum elf_ppc_reloc_type r;
1854
1855 /* Initialize howto table if not already done. */
1856 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1857 ppc_elf_howto_init ();
1858
1859 switch (code)
1860 {
1861 default:
1862 return NULL;
1863
1864 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1865 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1866 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1867 case BFD_RELOC_PPC64_ADDR16_DS:
1868 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1869 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1870 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1871 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1872 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1873 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1874 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1875 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1876 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1877 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1878 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1879 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1880 case BFD_RELOC_PPC64_GOT16_DS:
1881 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1882 case BFD_RELOC_PPC64_GOT16_LO_DS:
1883 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1884 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1885 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1886 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1887 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1888 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1889 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1890 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1891 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1892 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1893 case BFD_RELOC_PPC64_PLT16_LO_DS:
1894 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1895 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1896 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1897 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1898 case BFD_RELOC_PPC64_SECTOFF_DS:
1899 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1900 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1901 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1902 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1903 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1904 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1905 case BFD_RELOC_PPC64_TOC16_DS:
1906 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1907 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1908 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1909 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1910 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1911 case BFD_RELOC_PPC64_TPREL16_DS:
1912 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1913 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1914 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1915 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1916 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1917 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1918 case BFD_RELOC_PPC64_DTPREL16_DS:
1919 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1920 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1921 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1922 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1923 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1924 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1925 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1926 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1927 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1928 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1929 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1930 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1931 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1932 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1933 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1934 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1935 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1936 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1937 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1938 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1939 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1940 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1941 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1942 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1943 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1944 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1945 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1946 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1947 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1948 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1949 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1950 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1951 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1952 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1953 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1954 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1955 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1956 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1957 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1958 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1959 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1960 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1961 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1962 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1963 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1964 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1965 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1966 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1967 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1968 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1969 r = R_PPC_VLE_SDAREL_LO16A;
1970 break;
1971 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1972 r = R_PPC_VLE_SDAREL_LO16D;
1973 break;
1974 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1975 r = R_PPC_VLE_SDAREL_HI16A;
1976 break;
1977 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1978 r = R_PPC_VLE_SDAREL_HI16D;
1979 break;
1980 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1981 r = R_PPC_VLE_SDAREL_HA16A;
1982 break;
1983 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1984 r = R_PPC_VLE_SDAREL_HA16D;
1985 break;
1986 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1987 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1988 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1989 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1990 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
1991 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
1992 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1993 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1994 }
1995
1996 return ppc_elf_howto_table[r];
1997 };
1998
1999 static reloc_howto_type *
2000 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2001 const char *r_name)
2002 {
2003 unsigned int i;
2004
2005 for (i = 0;
2006 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2007 i++)
2008 if (ppc_elf_howto_raw[i].name != NULL
2009 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2010 return &ppc_elf_howto_raw[i];
2011
2012 return NULL;
2013 }
2014
2015 /* Set the howto pointer for a PowerPC ELF reloc. */
2016
2017 static bfd_boolean
2018 ppc_elf_info_to_howto (bfd *abfd,
2019 arelent *cache_ptr,
2020 Elf_Internal_Rela *dst)
2021 {
2022 unsigned int r_type;
2023
2024 /* Initialize howto table if not already done. */
2025 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2026 ppc_elf_howto_init ();
2027
2028 r_type = ELF32_R_TYPE (dst->r_info);
2029 if (r_type >= R_PPC_max)
2030 {
2031 /* xgettext:c-format */
2032 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2033 abfd, r_type);
2034 bfd_set_error (bfd_error_bad_value);
2035 return FALSE;
2036 }
2037
2038 cache_ptr->howto = ppc_elf_howto_table[r_type];
2039
2040 /* Just because the above assert didn't trigger doesn't mean that
2041 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2042 if (cache_ptr->howto == NULL)
2043 {
2044 /* xgettext:c-format */
2045 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2046 abfd, r_type);
2047 bfd_set_error (bfd_error_bad_value);
2048
2049 return FALSE;
2050 }
2051
2052 return TRUE;
2053 }
2054
2055 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2056
2057 static bfd_reloc_status_type
2058 ppc_elf_addr16_ha_reloc (bfd *abfd,
2059 arelent *reloc_entry,
2060 asymbol *symbol,
2061 void *data,
2062 asection *input_section,
2063 bfd *output_bfd,
2064 char **error_message ATTRIBUTE_UNUSED)
2065 {
2066 enum elf_ppc_reloc_type r_type;
2067 long insn;
2068 bfd_size_type octets;
2069 bfd_vma value;
2070
2071 if (output_bfd != NULL)
2072 {
2073 reloc_entry->address += input_section->output_offset;
2074 return bfd_reloc_ok;
2075 }
2076
2077 reloc_entry->addend += 0x8000;
2078 r_type = reloc_entry->howto->type;
2079 if (r_type != R_PPC_REL16DX_HA)
2080 return bfd_reloc_continue;
2081
2082 value = 0;
2083 if (!bfd_is_com_section (symbol->section))
2084 value = symbol->value;
2085 value += (reloc_entry->addend
2086 + symbol->section->output_offset
2087 + symbol->section->output_section->vma);
2088 value -= (reloc_entry->address
2089 + input_section->output_offset
2090 + input_section->output_section->vma);
2091 value >>= 16;
2092
2093 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2094 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2095 insn &= ~0x1fffc1;
2096 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2097 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2098 return bfd_reloc_ok;
2099 }
2100
2101 static bfd_reloc_status_type
2102 ppc_elf_unhandled_reloc (bfd *abfd,
2103 arelent *reloc_entry,
2104 asymbol *symbol,
2105 void *data,
2106 asection *input_section,
2107 bfd *output_bfd,
2108 char **error_message)
2109 {
2110 /* If this is a relocatable link (output_bfd test tells us), just
2111 call the generic function. Any adjustment will be done at final
2112 link time. */
2113 if (output_bfd != NULL)
2114 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2115 input_section, output_bfd, error_message);
2116
2117 if (error_message != NULL)
2118 {
2119 static char buf[60];
2120 sprintf (buf, _("generic linker can't handle %s"),
2121 reloc_entry->howto->name);
2122 *error_message = buf;
2123 }
2124 return bfd_reloc_dangerous;
2125 }
2126 \f
2127 /* Sections created by the linker. */
2128
2129 typedef struct elf_linker_section
2130 {
2131 /* Pointer to the bfd section. */
2132 asection *section;
2133 /* Section name. */
2134 const char *name;
2135 /* Associated bss section name. */
2136 const char *bss_name;
2137 /* Associated symbol name. */
2138 const char *sym_name;
2139 /* Associated symbol. */
2140 struct elf_link_hash_entry *sym;
2141 } elf_linker_section_t;
2142
2143 /* Linked list of allocated pointer entries. This hangs off of the
2144 symbol lists, and provides allows us to return different pointers,
2145 based on different addend's. */
2146
2147 typedef struct elf_linker_section_pointers
2148 {
2149 /* next allocated pointer for this symbol */
2150 struct elf_linker_section_pointers *next;
2151 /* offset of pointer from beginning of section */
2152 bfd_vma offset;
2153 /* addend used */
2154 bfd_vma addend;
2155 /* which linker section this is */
2156 elf_linker_section_t *lsect;
2157 } elf_linker_section_pointers_t;
2158
2159 struct ppc_elf_obj_tdata
2160 {
2161 struct elf_obj_tdata elf;
2162
2163 /* A mapping from local symbols to offsets into the various linker
2164 sections added. This is index by the symbol index. */
2165 elf_linker_section_pointers_t **linker_section_pointers;
2166
2167 /* Flags used to auto-detect plt type. */
2168 unsigned int makes_plt_call : 1;
2169 unsigned int has_rel16 : 1;
2170 };
2171
2172 #define ppc_elf_tdata(bfd) \
2173 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2174
2175 #define elf_local_ptr_offsets(bfd) \
2176 (ppc_elf_tdata (bfd)->linker_section_pointers)
2177
2178 #define is_ppc_elf(bfd) \
2179 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2180 && elf_object_id (bfd) == PPC32_ELF_DATA)
2181
2182 /* Override the generic function because we store some extras. */
2183
2184 static bfd_boolean
2185 ppc_elf_mkobject (bfd *abfd)
2186 {
2187 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2188 PPC32_ELF_DATA);
2189 }
2190
2191 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2192
2193 bfd_boolean
2194 _bfd_elf_ppc_set_arch (bfd *abfd)
2195 {
2196 unsigned long mach = 0;
2197 asection *s;
2198 unsigned char *contents;
2199
2200 if (abfd->arch_info->bits_per_word == 32
2201 && bfd_big_endian (abfd))
2202 {
2203
2204 for (s = abfd->sections; s != NULL; s = s->next)
2205 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2206 break;
2207 if (s != NULL)
2208 mach = bfd_mach_ppc_vle;
2209 }
2210
2211 if (mach == 0)
2212 {
2213 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2214 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2215 {
2216 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2217 unsigned int i;
2218
2219 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2220 {
2221 unsigned int val = bfd_get_32 (abfd, contents + i);
2222 switch (val >> 16)
2223 {
2224 case PPC_APUINFO_PMR:
2225 case PPC_APUINFO_RFMCI:
2226 if (mach == 0)
2227 mach = bfd_mach_ppc_titan;
2228 break;
2229
2230 case PPC_APUINFO_ISEL:
2231 case PPC_APUINFO_CACHELCK:
2232 if (mach == bfd_mach_ppc_titan)
2233 mach = bfd_mach_ppc_e500mc;
2234 break;
2235
2236 case PPC_APUINFO_SPE:
2237 case PPC_APUINFO_EFS:
2238 case PPC_APUINFO_BRLOCK:
2239 if (mach != bfd_mach_ppc_vle)
2240 mach = bfd_mach_ppc_e500;
2241 break;
2242
2243 case PPC_APUINFO_VLE:
2244 mach = bfd_mach_ppc_vle;
2245 break;
2246
2247 default:
2248 mach = -1ul;
2249 }
2250 }
2251 free (contents);
2252 }
2253 }
2254
2255 if (mach != 0 && mach != -1ul)
2256 {
2257 const bfd_arch_info_type *arch;
2258
2259 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2260 if (arch->mach == mach)
2261 {
2262 abfd->arch_info = arch;
2263 break;
2264 }
2265 }
2266 return TRUE;
2267 }
2268
2269 /* Fix bad default arch selected for a 32 bit input bfd when the
2270 default is 64 bit. Also select arch based on apuinfo. */
2271
2272 static bfd_boolean
2273 ppc_elf_object_p (bfd *abfd)
2274 {
2275 if (!abfd->arch_info->the_default)
2276 return TRUE;
2277
2278 if (abfd->arch_info->bits_per_word == 64)
2279 {
2280 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2281
2282 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2283 {
2284 /* Relies on arch after 64 bit default being 32 bit default. */
2285 abfd->arch_info = abfd->arch_info->next;
2286 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2287 }
2288 }
2289 return _bfd_elf_ppc_set_arch (abfd);
2290 }
2291
2292 /* Function to set whether a module needs the -mrelocatable bit set. */
2293
2294 static bfd_boolean
2295 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2296 {
2297 BFD_ASSERT (!elf_flags_init (abfd)
2298 || elf_elfheader (abfd)->e_flags == flags);
2299
2300 elf_elfheader (abfd)->e_flags = flags;
2301 elf_flags_init (abfd) = TRUE;
2302 return TRUE;
2303 }
2304
2305 /* Support for core dump NOTE sections. */
2306
2307 static bfd_boolean
2308 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2309 {
2310 int offset;
2311 unsigned int size;
2312
2313 switch (note->descsz)
2314 {
2315 default:
2316 return FALSE;
2317
2318 case 268: /* Linux/PPC. */
2319 /* pr_cursig */
2320 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2321
2322 /* pr_pid */
2323 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2324
2325 /* pr_reg */
2326 offset = 72;
2327 size = 192;
2328
2329 break;
2330 }
2331
2332 /* Make a ".reg/999" section. */
2333 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2334 size, note->descpos + offset);
2335 }
2336
2337 static bfd_boolean
2338 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2339 {
2340 switch (note->descsz)
2341 {
2342 default:
2343 return FALSE;
2344
2345 case 128: /* Linux/PPC elf_prpsinfo. */
2346 elf_tdata (abfd)->core->pid
2347 = bfd_get_32 (abfd, note->descdata + 16);
2348 elf_tdata (abfd)->core->program
2349 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2350 elf_tdata (abfd)->core->command
2351 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2352 }
2353
2354 /* Note that for some reason, a spurious space is tacked
2355 onto the end of the args in some (at least one anyway)
2356 implementations, so strip it off if it exists. */
2357
2358 {
2359 char *command = elf_tdata (abfd)->core->command;
2360 int n = strlen (command);
2361
2362 if (0 < n && command[n - 1] == ' ')
2363 command[n - 1] = '\0';
2364 }
2365
2366 return TRUE;
2367 }
2368
2369 static char *
2370 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2371 {
2372 switch (note_type)
2373 {
2374 default:
2375 return NULL;
2376
2377 case NT_PRPSINFO:
2378 {
2379 char data[128];
2380 va_list ap;
2381
2382 va_start (ap, note_type);
2383 memset (data, 0, sizeof (data));
2384 strncpy (data + 32, va_arg (ap, const char *), 16);
2385 strncpy (data + 48, va_arg (ap, const char *), 80);
2386 va_end (ap);
2387 return elfcore_write_note (abfd, buf, bufsiz,
2388 "CORE", note_type, data, sizeof (data));
2389 }
2390
2391 case NT_PRSTATUS:
2392 {
2393 char data[268];
2394 va_list ap;
2395 long pid;
2396 int cursig;
2397 const void *greg;
2398
2399 va_start (ap, note_type);
2400 memset (data, 0, 72);
2401 pid = va_arg (ap, long);
2402 bfd_put_32 (abfd, pid, data + 24);
2403 cursig = va_arg (ap, int);
2404 bfd_put_16 (abfd, cursig, data + 12);
2405 greg = va_arg (ap, const void *);
2406 memcpy (data + 72, greg, 192);
2407 memset (data + 264, 0, 4);
2408 va_end (ap);
2409 return elfcore_write_note (abfd, buf, bufsiz,
2410 "CORE", note_type, data, sizeof (data));
2411 }
2412 }
2413 }
2414
2415 static flagword
2416 ppc_elf_lookup_section_flags (char *flag_name)
2417 {
2418
2419 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2420 return SHF_PPC_VLE;
2421
2422 return 0;
2423 }
2424
2425 /* Return address for Ith PLT stub in section PLT, for relocation REL
2426 or (bfd_vma) -1 if it should not be included. */
2427
2428 static bfd_vma
2429 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2430 const asection *plt ATTRIBUTE_UNUSED,
2431 const arelent *rel)
2432 {
2433 return rel->address;
2434 }
2435
2436 /* Handle a PowerPC specific section when reading an object file. This
2437 is called when bfd_section_from_shdr finds a section with an unknown
2438 type. */
2439
2440 static bfd_boolean
2441 ppc_elf_section_from_shdr (bfd *abfd,
2442 Elf_Internal_Shdr *hdr,
2443 const char *name,
2444 int shindex)
2445 {
2446 asection *newsect;
2447 flagword flags;
2448
2449 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2450 return FALSE;
2451
2452 newsect = hdr->bfd_section;
2453 flags = bfd_get_section_flags (abfd, newsect);
2454 if (hdr->sh_flags & SHF_EXCLUDE)
2455 flags |= SEC_EXCLUDE;
2456
2457 if (hdr->sh_type == SHT_ORDERED)
2458 flags |= SEC_SORT_ENTRIES;
2459
2460 bfd_set_section_flags (abfd, newsect, flags);
2461 return TRUE;
2462 }
2463
2464 /* Set up any other section flags and such that may be necessary. */
2465
2466 static bfd_boolean
2467 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2468 Elf_Internal_Shdr *shdr,
2469 asection *asect)
2470 {
2471 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2472 shdr->sh_type = SHT_ORDERED;
2473
2474 return TRUE;
2475 }
2476
2477 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2478 need to bump up the number of section headers. */
2479
2480 static int
2481 ppc_elf_additional_program_headers (bfd *abfd,
2482 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2483 {
2484 asection *s;
2485 int ret = 0;
2486
2487 s = bfd_get_section_by_name (abfd, ".sbss2");
2488 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2489 ++ret;
2490
2491 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2492 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2493 ++ret;
2494
2495 return ret;
2496 }
2497
2498 /* Modify the segment map for VLE executables. */
2499
2500 bfd_boolean
2501 ppc_elf_modify_segment_map (bfd *abfd,
2502 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2503 {
2504 struct elf_segment_map *m;
2505
2506 /* At this point in the link, output sections have already been sorted by
2507 LMA and assigned to segments. All that is left to do is to ensure
2508 there is no mixing of VLE & non-VLE sections in a text segment.
2509 If we find that case, we split the segment.
2510 We maintain the original output section order. */
2511
2512 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2513 {
2514 struct elf_segment_map *n;
2515 bfd_size_type amt;
2516 unsigned int j, k;
2517 unsigned int p_flags;
2518
2519 if (m->p_type != PT_LOAD || m->count == 0)
2520 continue;
2521
2522 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2523 {
2524 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2525 p_flags |= PF_W;
2526 if ((m->sections[j]->flags & SEC_CODE) != 0)
2527 {
2528 p_flags |= PF_X;
2529 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2530 p_flags |= PF_PPC_VLE;
2531 break;
2532 }
2533 }
2534 if (j != m->count)
2535 while (++j != m->count)
2536 {
2537 unsigned int p_flags1 = PF_R;
2538
2539 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2540 p_flags1 |= PF_W;
2541 if ((m->sections[j]->flags & SEC_CODE) != 0)
2542 {
2543 p_flags1 |= PF_X;
2544 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2545 p_flags1 |= PF_PPC_VLE;
2546 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2547 break;
2548 }
2549 p_flags |= p_flags1;
2550 }
2551 /* If we're splitting a segment which originally contained rw
2552 sections then those sections might now only be in one of the
2553 two parts. So always set p_flags if splitting, even if we
2554 are being called for objcopy with p_flags_valid set. */
2555 if (j != m->count || !m->p_flags_valid)
2556 {
2557 m->p_flags_valid = 1;
2558 m->p_flags = p_flags;
2559 }
2560 if (j == m->count)
2561 continue;
2562
2563 /* Sections 0..j-1 stay in this (current) segment,
2564 the remainder are put in a new segment.
2565 The scan resumes with the new segment. */
2566
2567 amt = sizeof (struct elf_segment_map);
2568 amt += (m->count - j - 1) * sizeof (asection *);
2569 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2570 if (n == NULL)
2571 return FALSE;
2572
2573 n->p_type = PT_LOAD;
2574 n->count = m->count - j;
2575 for (k = 0; k < n->count; ++k)
2576 n->sections[k] = m->sections[j + k];
2577 m->count = j;
2578 m->p_size_valid = 0;
2579 n->next = m->next;
2580 m->next = n;
2581 }
2582
2583 return TRUE;
2584 }
2585
2586 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2587 .PPC.EMB.sbss0 a normal section, and not a bss section so
2588 that the linker doesn't crater when trying to make more than
2589 2 sections. */
2590
2591 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2592 {
2593 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2594 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2595 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2596 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2597 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2598 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2599 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2600 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2601 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2602 { NULL, 0, 0, 0, 0 }
2603 };
2604
2605 /* This is what we want for new plt/got. */
2606 static struct bfd_elf_special_section ppc_alt_plt =
2607 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2608
2609 static const struct bfd_elf_special_section *
2610 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2611 {
2612 const struct bfd_elf_special_section *ssect;
2613
2614 /* See if this is one of the special sections. */
2615 if (sec->name == NULL)
2616 return NULL;
2617
2618 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2619 sec->use_rela_p);
2620 if (ssect != NULL)
2621 {
2622 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2623 ssect = &ppc_alt_plt;
2624 return ssect;
2625 }
2626
2627 return _bfd_elf_get_sec_type_attr (abfd, sec);
2628 }
2629 \f
2630 /* Very simple linked list structure for recording apuinfo values. */
2631 typedef struct apuinfo_list
2632 {
2633 struct apuinfo_list *next;
2634 unsigned long value;
2635 }
2636 apuinfo_list;
2637
2638 static apuinfo_list *head;
2639 static bfd_boolean apuinfo_set;
2640
2641 static void
2642 apuinfo_list_init (void)
2643 {
2644 head = NULL;
2645 apuinfo_set = FALSE;
2646 }
2647
2648 static void
2649 apuinfo_list_add (unsigned long value)
2650 {
2651 apuinfo_list *entry = head;
2652
2653 while (entry != NULL)
2654 {
2655 if (entry->value == value)
2656 return;
2657 entry = entry->next;
2658 }
2659
2660 entry = bfd_malloc (sizeof (* entry));
2661 if (entry == NULL)
2662 return;
2663
2664 entry->value = value;
2665 entry->next = head;
2666 head = entry;
2667 }
2668
2669 static unsigned
2670 apuinfo_list_length (void)
2671 {
2672 apuinfo_list *entry;
2673 unsigned long count;
2674
2675 for (entry = head, count = 0;
2676 entry;
2677 entry = entry->next)
2678 ++ count;
2679
2680 return count;
2681 }
2682
2683 static inline unsigned long
2684 apuinfo_list_element (unsigned long number)
2685 {
2686 apuinfo_list * entry;
2687
2688 for (entry = head;
2689 entry && number --;
2690 entry = entry->next)
2691 ;
2692
2693 return entry ? entry->value : 0;
2694 }
2695
2696 static void
2697 apuinfo_list_finish (void)
2698 {
2699 apuinfo_list *entry;
2700
2701 for (entry = head; entry;)
2702 {
2703 apuinfo_list *next = entry->next;
2704 free (entry);
2705 entry = next;
2706 }
2707
2708 head = NULL;
2709 }
2710
2711 /* Scan the input BFDs and create a linked list of
2712 the APUinfo values that will need to be emitted. */
2713
2714 static void
2715 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2716 {
2717 bfd *ibfd;
2718 asection *asec;
2719 char *buffer = NULL;
2720 bfd_size_type largest_input_size = 0;
2721 unsigned i;
2722 unsigned long length;
2723 const char *error_message = NULL;
2724
2725 if (link_info == NULL)
2726 return;
2727
2728 apuinfo_list_init ();
2729
2730 /* Read in the input sections contents. */
2731 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2732 {
2733 unsigned long datum;
2734
2735 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2736 if (asec == NULL)
2737 continue;
2738
2739 /* xgettext:c-format */
2740 error_message = _("corrupt %s section in %pB");
2741 length = asec->size;
2742 if (length < 20)
2743 goto fail;
2744
2745 apuinfo_set = TRUE;
2746 if (largest_input_size < asec->size)
2747 {
2748 if (buffer)
2749 free (buffer);
2750 largest_input_size = asec->size;
2751 buffer = bfd_malloc (largest_input_size);
2752 if (!buffer)
2753 return;
2754 }
2755
2756 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2757 || (bfd_bread (buffer, length, ibfd) != length))
2758 {
2759 /* xgettext:c-format */
2760 error_message = _("unable to read in %s section from %pB");
2761 goto fail;
2762 }
2763
2764 /* Verify the contents of the header. Note - we have to
2765 extract the values this way in order to allow for a
2766 host whose endian-ness is different from the target. */
2767 datum = bfd_get_32 (ibfd, buffer);
2768 if (datum != sizeof APUINFO_LABEL)
2769 goto fail;
2770
2771 datum = bfd_get_32 (ibfd, buffer + 8);
2772 if (datum != 0x2)
2773 goto fail;
2774
2775 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2776 goto fail;
2777
2778 /* Get the number of bytes used for apuinfo entries. */
2779 datum = bfd_get_32 (ibfd, buffer + 4);
2780 if (datum + 20 != length)
2781 goto fail;
2782
2783 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2784 for (i = 0; i < datum; i += 4)
2785 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2786 }
2787
2788 error_message = NULL;
2789
2790 if (apuinfo_set)
2791 {
2792 /* Compute the size of the output section. */
2793 unsigned num_entries = apuinfo_list_length ();
2794
2795 /* Set the output section size, if it exists. */
2796 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2797
2798 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2799 {
2800 ibfd = abfd;
2801 /* xgettext:c-format */
2802 error_message = _("warning: unable to set size of %s section in %pB");
2803 }
2804 }
2805
2806 fail:
2807 if (buffer)
2808 free (buffer);
2809
2810 if (error_message)
2811 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
2812 }
2813
2814 /* Prevent the output section from accumulating the input sections'
2815 contents. We have already stored this in our linked list structure. */
2816
2817 static bfd_boolean
2818 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2819 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2820 asection *asec,
2821 bfd_byte *contents ATTRIBUTE_UNUSED)
2822 {
2823 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2824 }
2825
2826 /* Finally we can generate the output section. */
2827
2828 static void
2829 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2830 {
2831 bfd_byte *buffer;
2832 asection *asec;
2833 unsigned i;
2834 unsigned num_entries;
2835 bfd_size_type length;
2836
2837 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2838 if (asec == NULL)
2839 return;
2840
2841 if (!apuinfo_set)
2842 return;
2843
2844 length = asec->size;
2845 if (length < 20)
2846 return;
2847
2848 buffer = bfd_malloc (length);
2849 if (buffer == NULL)
2850 {
2851 _bfd_error_handler
2852 (_("failed to allocate space for new APUinfo section"));
2853 return;
2854 }
2855
2856 /* Create the apuinfo header. */
2857 num_entries = apuinfo_list_length ();
2858 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2859 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2860 bfd_put_32 (abfd, 0x2, buffer + 8);
2861 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2862
2863 length = 20;
2864 for (i = 0; i < num_entries; i++)
2865 {
2866 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2867 length += 4;
2868 }
2869
2870 if (length != asec->size)
2871 _bfd_error_handler (_("failed to compute new APUinfo section"));
2872
2873 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2874 _bfd_error_handler (_("failed to install new APUinfo section"));
2875
2876 free (buffer);
2877
2878 apuinfo_list_finish ();
2879 }
2880 \f
2881 static bfd_boolean
2882 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2883 {
2884 bfd_byte buf[4 * 4];
2885
2886 if (!bfd_get_section_contents (abfd, glink, buf, off, sizeof buf))
2887 return FALSE;
2888
2889 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2890 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2891 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2892 && bfd_get_32 (abfd, buf + 12) == BCTR);
2893 }
2894
2895 static bfd_boolean
2896 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2897 {
2898 bfd_vma vma = *(bfd_vma *) ptr;
2899 return ((section->flags & SEC_ALLOC) != 0
2900 && section->vma <= vma
2901 && vma < section->vma + section->size);
2902 }
2903
2904 static long
2905 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2906 long dynsymcount, asymbol **dynsyms,
2907 asymbol **ret)
2908 {
2909 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2910 asection *plt, *relplt, *dynamic, *glink;
2911 bfd_vma glink_vma = 0;
2912 bfd_vma resolv_vma = 0;
2913 bfd_vma stub_off;
2914 asymbol *s;
2915 arelent *p;
2916 long count, i, stub_delta;
2917 size_t size;
2918 char *names;
2919 bfd_byte buf[4];
2920
2921 *ret = NULL;
2922
2923 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2924 return 0;
2925
2926 if (dynsymcount <= 0)
2927 return 0;
2928
2929 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2930 if (relplt == NULL)
2931 return 0;
2932
2933 plt = bfd_get_section_by_name (abfd, ".plt");
2934 if (plt == NULL)
2935 return 0;
2936
2937 /* Call common code to handle old-style executable PLTs. */
2938 if (elf_section_flags (plt) & SHF_EXECINSTR)
2939 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2940 dynsymcount, dynsyms, ret);
2941
2942 /* If this object was prelinked, the prelinker stored the address
2943 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2944 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2945 if (dynamic != NULL)
2946 {
2947 bfd_byte *dynbuf, *extdyn, *extdynend;
2948 size_t extdynsize;
2949 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2950
2951 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2952 return -1;
2953
2954 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2955 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2956
2957 extdyn = dynbuf;
2958 extdynend = extdyn + dynamic->size;
2959 for (; extdyn < extdynend; extdyn += extdynsize)
2960 {
2961 Elf_Internal_Dyn dyn;
2962 (*swap_dyn_in) (abfd, extdyn, &dyn);
2963
2964 if (dyn.d_tag == DT_NULL)
2965 break;
2966
2967 if (dyn.d_tag == DT_PPC_GOT)
2968 {
2969 unsigned int g_o_t = dyn.d_un.d_val;
2970 asection *got = bfd_get_section_by_name (abfd, ".got");
2971 if (got != NULL
2972 && bfd_get_section_contents (abfd, got, buf,
2973 g_o_t - got->vma + 4, 4))
2974 glink_vma = bfd_get_32 (abfd, buf);
2975 break;
2976 }
2977 }
2978 free (dynbuf);
2979 }
2980
2981 /* Otherwise we read the first plt entry. */
2982 if (glink_vma == 0)
2983 {
2984 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2985 glink_vma = bfd_get_32 (abfd, buf);
2986 }
2987
2988 if (glink_vma == 0)
2989 return 0;
2990
2991 /* The .glink section usually does not survive the final
2992 link; search for the section (usually .text) where the
2993 glink stubs now reside. */
2994 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2995 if (glink == NULL)
2996 return 0;
2997
2998 /* Determine glink PLT resolver by reading the relative branch
2999 from the first glink stub. */
3000 if (bfd_get_section_contents (abfd, glink, buf,
3001 glink_vma - glink->vma, 4))
3002 {
3003 unsigned int insn = bfd_get_32 (abfd, buf);
3004
3005 /* The first glink stub may either branch to the resolver ... */
3006 insn ^= B;
3007 if ((insn & ~0x3fffffc) == 0)
3008 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3009
3010 /* ... or fall through a bunch of NOPs. */
3011 else if ((insn ^ B ^ NOP) == 0)
3012 for (i = 4;
3013 bfd_get_section_contents (abfd, glink, buf,
3014 glink_vma - glink->vma + i, 4);
3015 i += 4)
3016 if (bfd_get_32 (abfd, buf) != NOP)
3017 {
3018 resolv_vma = glink_vma + i;
3019 break;
3020 }
3021 }
3022
3023 count = relplt->size / sizeof (Elf32_External_Rela);
3024 /* If the stubs are those for -shared/-pie then we might have
3025 multiple stubs for each plt entry. If that is the case then
3026 there is no way to associate stubs with their plt entries short
3027 of figuring out the GOT pointer value used in the stub.
3028 The offsets tested here need to cover all possible values of
3029 GLINK_ENTRY_SIZE for other than __tls_get_addr_opt. */
3030 stub_off = glink_vma - glink->vma;
3031 for (stub_delta = 16; stub_delta <= 32; stub_delta += 8)
3032 if (is_nonpic_glink_stub (abfd, glink, stub_off - stub_delta))
3033 break;
3034 if (stub_delta > 32)
3035 return 0;
3036
3037 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3038 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3039 return -1;
3040
3041 size = count * sizeof (asymbol);
3042 p = relplt->relocation;
3043 for (i = 0; i < count; i++, p++)
3044 {
3045 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3046 if (p->addend != 0)
3047 size += sizeof ("+0x") - 1 + 8;
3048 }
3049
3050 size += sizeof (asymbol) + sizeof ("__glink");
3051
3052 if (resolv_vma)
3053 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3054
3055 s = *ret = bfd_malloc (size);
3056 if (s == NULL)
3057 return -1;
3058
3059 stub_off = glink_vma - glink->vma;
3060 names = (char *) (s + count + 1 + (resolv_vma != 0));
3061 p = relplt->relocation + count - 1;
3062 for (i = 0; i < count; i++)
3063 {
3064 size_t len;
3065
3066 stub_off -= stub_delta;
3067 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3068 stub_off -= 32;
3069 *s = **p->sym_ptr_ptr;
3070 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3071 we are defining a symbol, ensure one of them is set. */
3072 if ((s->flags & BSF_LOCAL) == 0)
3073 s->flags |= BSF_GLOBAL;
3074 s->flags |= BSF_SYNTHETIC;
3075 s->section = glink;
3076 s->value = stub_off;
3077 s->name = names;
3078 s->udata.p = NULL;
3079 len = strlen ((*p->sym_ptr_ptr)->name);
3080 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3081 names += len;
3082 if (p->addend != 0)
3083 {
3084 memcpy (names, "+0x", sizeof ("+0x") - 1);
3085 names += sizeof ("+0x") - 1;
3086 bfd_sprintf_vma (abfd, names, p->addend);
3087 names += strlen (names);
3088 }
3089 memcpy (names, "@plt", sizeof ("@plt"));
3090 names += sizeof ("@plt");
3091 ++s;
3092 --p;
3093 }
3094
3095 /* Add a symbol at the start of the glink branch table. */
3096 memset (s, 0, sizeof *s);
3097 s->the_bfd = abfd;
3098 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3099 s->section = glink;
3100 s->value = glink_vma - glink->vma;
3101 s->name = names;
3102 memcpy (names, "__glink", sizeof ("__glink"));
3103 names += sizeof ("__glink");
3104 s++;
3105 count++;
3106
3107 if (resolv_vma)
3108 {
3109 /* Add a symbol for the glink PLT resolver. */
3110 memset (s, 0, sizeof *s);
3111 s->the_bfd = abfd;
3112 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3113 s->section = glink;
3114 s->value = resolv_vma - glink->vma;
3115 s->name = names;
3116 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3117 names += sizeof ("__glink_PLTresolve");
3118 s++;
3119 count++;
3120 }
3121
3122 return count;
3123 }
3124 \f
3125 /* The following functions are specific to the ELF linker, while
3126 functions above are used generally. They appear in this file more
3127 or less in the order in which they are called. eg.
3128 ppc_elf_check_relocs is called early in the link process,
3129 ppc_elf_finish_dynamic_sections is one of the last functions
3130 called. */
3131
3132 /* Track PLT entries needed for a given symbol. We might need more
3133 than one glink entry per symbol when generating a pic binary. */
3134 struct plt_entry
3135 {
3136 struct plt_entry *next;
3137
3138 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3139 This field stores the offset into .got2 used to initialise the
3140 GOT pointer reg. It will always be at least 32768. (Current
3141 gcc always uses an offset of 32768, but ld -r will pack .got2
3142 sections together resulting in larger offsets). */
3143 bfd_vma addend;
3144
3145 /* The .got2 section. */
3146 asection *sec;
3147
3148 /* PLT refcount or offset. */
3149 union
3150 {
3151 bfd_signed_vma refcount;
3152 bfd_vma offset;
3153 } plt;
3154
3155 /* .glink stub offset. */
3156 bfd_vma glink_offset;
3157 };
3158
3159 /* Of those relocs that might be copied as dynamic relocs, this
3160 function selects those that must be copied when linking a shared
3161 library or PIE, even when the symbol is local. */
3162
3163 static int
3164 must_be_dyn_reloc (struct bfd_link_info *info,
3165 enum elf_ppc_reloc_type r_type)
3166 {
3167 switch (r_type)
3168 {
3169 default:
3170 /* Only relative relocs can be resolved when the object load
3171 address isn't fixed. DTPREL32 is excluded because the
3172 dynamic linker needs to differentiate global dynamic from
3173 local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
3174 return 1;
3175
3176 case R_PPC_REL24:
3177 case R_PPC_REL14:
3178 case R_PPC_REL14_BRTAKEN:
3179 case R_PPC_REL14_BRNTAKEN:
3180 case R_PPC_REL32:
3181 return 0;
3182
3183 case R_PPC_TPREL32:
3184 case R_PPC_TPREL16:
3185 case R_PPC_TPREL16_LO:
3186 case R_PPC_TPREL16_HI:
3187 case R_PPC_TPREL16_HA:
3188 /* These relocations are relative but in a shared library the
3189 linker doesn't know the thread pointer base. */
3190 return bfd_link_dll (info);
3191 }
3192 }
3193
3194 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3195 copying dynamic variables from a shared lib into an app's dynbss
3196 section, and instead use a dynamic relocation to point into the
3197 shared lib. */
3198 #define ELIMINATE_COPY_RELOCS 1
3199
3200 /* Used to track dynamic relocations for local symbols. */
3201 struct ppc_dyn_relocs
3202 {
3203 struct ppc_dyn_relocs *next;
3204
3205 /* The input section of the reloc. */
3206 asection *sec;
3207
3208 /* Total number of relocs copied for the input section. */
3209 unsigned int count : 31;
3210
3211 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3212 unsigned int ifunc : 1;
3213 };
3214
3215 /* PPC ELF linker hash entry. */
3216
3217 struct ppc_elf_link_hash_entry
3218 {
3219 struct elf_link_hash_entry elf;
3220
3221 /* If this symbol is used in the linker created sections, the processor
3222 specific backend uses this field to map the field into the offset
3223 from the beginning of the section. */
3224 elf_linker_section_pointers_t *linker_section_pointer;
3225
3226 /* Track dynamic relocs copied for this symbol. */
3227 struct elf_dyn_relocs *dyn_relocs;
3228
3229 /* Contexts in which symbol is used in the GOT (or TOC).
3230 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3231 corresponding relocs are encountered during check_relocs.
3232 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3233 indicate the corresponding GOT entry type is not needed. */
3234 #define TLS_GD 1 /* GD reloc. */
3235 #define TLS_LD 2 /* LD reloc. */
3236 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3237 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3238 #define TLS_TLS 16 /* Any TLS reloc. */
3239 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3240 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3241 char tls_mask;
3242
3243 /* Nonzero if we have seen a small data relocation referring to this
3244 symbol. */
3245 unsigned char has_sda_refs : 1;
3246
3247 /* Flag use of given relocations. */
3248 unsigned char has_addr16_ha : 1;
3249 unsigned char has_addr16_lo : 1;
3250 };
3251
3252 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3253
3254 /* PPC ELF linker hash table. */
3255
3256 struct ppc_elf_link_hash_table
3257 {
3258 struct elf_link_hash_table elf;
3259
3260 /* Various options passed from the linker. */
3261 struct ppc_elf_params *params;
3262
3263 /* Short-cuts to get to dynamic linker sections. */
3264 asection *glink;
3265 asection *dynsbss;
3266 asection *relsbss;
3267 elf_linker_section_t sdata[2];
3268 asection *sbss;
3269 asection *glink_eh_frame;
3270
3271 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3272 asection *srelplt2;
3273
3274 /* Shortcut to __tls_get_addr. */
3275 struct elf_link_hash_entry *tls_get_addr;
3276
3277 /* The bfd that forced an old-style PLT. */
3278 bfd *old_bfd;
3279
3280 /* TLS local dynamic got entry handling. */
3281 union {
3282 bfd_signed_vma refcount;
3283 bfd_vma offset;
3284 } tlsld_got;
3285
3286 /* Offset of branch table to PltResolve function in glink. */
3287 bfd_vma glink_pltresolve;
3288
3289 /* Size of reserved GOT entries. */
3290 unsigned int got_header_size;
3291 /* Non-zero if allocating the header left a gap. */
3292 unsigned int got_gap;
3293
3294 /* The type of PLT we have chosen to use. */
3295 enum ppc_elf_plt_type plt_type;
3296
3297 /* True if the target system is VxWorks. */
3298 unsigned int is_vxworks:1;
3299
3300 /* Whether there exist local gnu indirect function resolvers,
3301 referenced by dynamic relocations. */
3302 unsigned int local_ifunc_resolver:1;
3303 unsigned int maybe_local_ifunc_resolver:1;
3304
3305 /* Set if tls optimization is enabled. */
3306 unsigned int do_tls_opt:1;
3307
3308 /* The size of PLT entries. */
3309 int plt_entry_size;
3310 /* The distance between adjacent PLT slots. */
3311 int plt_slot_size;
3312 /* The size of the first PLT entry. */
3313 int plt_initial_entry_size;
3314
3315 /* Small local sym cache. */
3316 struct sym_cache sym_cache;
3317 };
3318
3319 /* Rename some of the generic section flags to better document how they
3320 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3321
3322 /* Nonzero if this section has TLS related relocations. */
3323 #define has_tls_reloc sec_flg0
3324
3325 /* Nonzero if this section has a call to __tls_get_addr. */
3326 #define has_tls_get_addr_call sec_flg1
3327
3328 /* Get the PPC ELF linker hash table from a link_info structure. */
3329
3330 #define ppc_elf_hash_table(p) \
3331 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3332 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3333
3334 /* Create an entry in a PPC ELF linker hash table. */
3335
3336 static struct bfd_hash_entry *
3337 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3338 struct bfd_hash_table *table,
3339 const char *string)
3340 {
3341 /* Allocate the structure if it has not already been allocated by a
3342 subclass. */
3343 if (entry == NULL)
3344 {
3345 entry = bfd_hash_allocate (table,
3346 sizeof (struct ppc_elf_link_hash_entry));
3347 if (entry == NULL)
3348 return entry;
3349 }
3350
3351 /* Call the allocation method of the superclass. */
3352 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3353 if (entry != NULL)
3354 {
3355 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3356 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3357 ppc_elf_hash_entry (entry)->tls_mask = 0;
3358 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3359 }
3360
3361 return entry;
3362 }
3363
3364 /* Create a PPC ELF linker hash table. */
3365
3366 static struct bfd_link_hash_table *
3367 ppc_elf_link_hash_table_create (bfd *abfd)
3368 {
3369 struct ppc_elf_link_hash_table *ret;
3370 static struct ppc_elf_params default_params
3371 = { PLT_OLD, 0, 0, 1, 0, 0, 12, 0, 0, 0 };
3372
3373 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3374 if (ret == NULL)
3375 return NULL;
3376
3377 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3378 ppc_elf_link_hash_newfunc,
3379 sizeof (struct ppc_elf_link_hash_entry),
3380 PPC32_ELF_DATA))
3381 {
3382 free (ret);
3383 return NULL;
3384 }
3385
3386 ret->elf.init_plt_refcount.refcount = 0;
3387 ret->elf.init_plt_refcount.glist = NULL;
3388 ret->elf.init_plt_offset.offset = 0;
3389 ret->elf.init_plt_offset.glist = NULL;
3390
3391 ret->params = &default_params;
3392
3393 ret->sdata[0].name = ".sdata";
3394 ret->sdata[0].sym_name = "_SDA_BASE_";
3395 ret->sdata[0].bss_name = ".sbss";
3396
3397 ret->sdata[1].name = ".sdata2";
3398 ret->sdata[1].sym_name = "_SDA2_BASE_";
3399 ret->sdata[1].bss_name = ".sbss2";
3400
3401 ret->plt_entry_size = 12;
3402 ret->plt_slot_size = 8;
3403 ret->plt_initial_entry_size = 72;
3404
3405 return &ret->elf.root;
3406 }
3407
3408 /* Hook linker params into hash table. */
3409
3410 void
3411 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3412 {
3413 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3414
3415 if (htab)
3416 htab->params = params;
3417 params->pagesize_p2 = bfd_log2 (params->pagesize);
3418 }
3419
3420 /* Create .got and the related sections. */
3421
3422 static bfd_boolean
3423 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3424 {
3425 struct ppc_elf_link_hash_table *htab;
3426
3427 if (!_bfd_elf_create_got_section (abfd, info))
3428 return FALSE;
3429
3430 htab = ppc_elf_hash_table (info);
3431 if (!htab->is_vxworks)
3432 {
3433 /* The powerpc .got has a blrl instruction in it. Mark it
3434 executable. */
3435 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3436 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3437 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3438 return FALSE;
3439 }
3440
3441 return TRUE;
3442 }
3443
3444 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3445 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3446 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3447
3448 static bfd_boolean
3449 ppc_elf_create_linker_section (bfd *abfd,
3450 struct bfd_link_info *info,
3451 flagword flags,
3452 elf_linker_section_t *lsect)
3453 {
3454 asection *s;
3455
3456 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3457 | SEC_LINKER_CREATED);
3458
3459 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3460 if (s == NULL)
3461 return FALSE;
3462 lsect->section = s;
3463
3464 /* Define the sym on the first section of this name. */
3465 s = bfd_get_section_by_name (abfd, lsect->name);
3466
3467 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3468 if (lsect->sym == NULL)
3469 return FALSE;
3470 lsect->sym->root.u.def.value = 0x8000;
3471 return TRUE;
3472 }
3473
3474 static bfd_boolean
3475 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3476 {
3477 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3478 asection *s;
3479 flagword flags;
3480 int p2align;
3481
3482 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3483 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3484 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3485 htab->glink = s;
3486 p2align = htab->params->ppc476_workaround ? 6 : 4;
3487 if (p2align < htab->params->plt_stub_align)
3488 p2align = htab->params->plt_stub_align;
3489 if (s == NULL
3490 || !bfd_set_section_alignment (abfd, s, p2align))
3491 return FALSE;
3492
3493 if (!info->no_ld_generated_unwind_info)
3494 {
3495 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3496 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3497 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3498 htab->glink_eh_frame = s;
3499 if (s == NULL
3500 || !bfd_set_section_alignment (abfd, s, 2))
3501 return FALSE;
3502 }
3503
3504 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3505 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3506 htab->elf.iplt = s;
3507 if (s == NULL
3508 || !bfd_set_section_alignment (abfd, s, 4))
3509 return FALSE;
3510
3511 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3512 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3513 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3514 htab->elf.irelplt = s;
3515 if (s == NULL
3516 || ! bfd_set_section_alignment (abfd, s, 2))
3517 return FALSE;
3518
3519 if (!ppc_elf_create_linker_section (abfd, info, 0,
3520 &htab->sdata[0]))
3521 return FALSE;
3522
3523 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3524 &htab->sdata[1]))
3525 return FALSE;
3526
3527 return TRUE;
3528 }
3529
3530 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3531 to output sections (just like _bfd_elf_create_dynamic_sections has
3532 to create .dynbss and .rela.bss). */
3533
3534 static bfd_boolean
3535 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3536 {
3537 struct ppc_elf_link_hash_table *htab;
3538 asection *s;
3539 flagword flags;
3540
3541 htab = ppc_elf_hash_table (info);
3542
3543 if (htab->elf.sgot == NULL
3544 && !ppc_elf_create_got (abfd, info))
3545 return FALSE;
3546
3547 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3548 return FALSE;
3549
3550 if (htab->glink == NULL
3551 && !ppc_elf_create_glink (abfd, info))
3552 return FALSE;
3553
3554 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3555 SEC_ALLOC | SEC_LINKER_CREATED);
3556 htab->dynsbss = s;
3557 if (s == NULL)
3558 return FALSE;
3559
3560 if (! bfd_link_pic (info))
3561 {
3562 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3563 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3564 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3565 htab->relsbss = s;
3566 if (s == NULL
3567 || ! bfd_set_section_alignment (abfd, s, 2))
3568 return FALSE;
3569 }
3570
3571 if (htab->is_vxworks
3572 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3573 return FALSE;
3574
3575 s = htab->elf.splt;
3576 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3577 if (htab->plt_type == PLT_VXWORKS)
3578 /* The VxWorks PLT is a loaded section with contents. */
3579 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3580 return bfd_set_section_flags (abfd, s, flags);
3581 }
3582
3583 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3584
3585 static void
3586 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3587 struct elf_link_hash_entry *dir,
3588 struct elf_link_hash_entry *ind)
3589 {
3590 struct ppc_elf_link_hash_entry *edir, *eind;
3591
3592 edir = (struct ppc_elf_link_hash_entry *) dir;
3593 eind = (struct ppc_elf_link_hash_entry *) ind;
3594
3595 edir->tls_mask |= eind->tls_mask;
3596 edir->has_sda_refs |= eind->has_sda_refs;
3597
3598 if (edir->elf.versioned != versioned_hidden)
3599 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3600 edir->elf.ref_regular |= eind->elf.ref_regular;
3601 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3602 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3603 edir->elf.needs_plt |= eind->elf.needs_plt;
3604 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3605
3606 /* If we were called to copy over info for a weak sym, that's all. */
3607 if (eind->elf.root.type != bfd_link_hash_indirect)
3608 return;
3609
3610 if (eind->dyn_relocs != NULL)
3611 {
3612 if (edir->dyn_relocs != NULL)
3613 {
3614 struct elf_dyn_relocs **pp;
3615 struct elf_dyn_relocs *p;
3616
3617 /* Add reloc counts against the indirect sym to the direct sym
3618 list. Merge any entries against the same section. */
3619 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3620 {
3621 struct elf_dyn_relocs *q;
3622
3623 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3624 if (q->sec == p->sec)
3625 {
3626 q->pc_count += p->pc_count;
3627 q->count += p->count;
3628 *pp = p->next;
3629 break;
3630 }
3631 if (q == NULL)
3632 pp = &p->next;
3633 }
3634 *pp = edir->dyn_relocs;
3635 }
3636
3637 edir->dyn_relocs = eind->dyn_relocs;
3638 eind->dyn_relocs = NULL;
3639 }
3640
3641 /* Copy over the GOT refcount entries that we may have already seen to
3642 the symbol which just became indirect. */
3643 edir->elf.got.refcount += eind->elf.got.refcount;
3644 eind->elf.got.refcount = 0;
3645
3646 /* And plt entries. */
3647 if (eind->elf.plt.plist != NULL)
3648 {
3649 if (edir->elf.plt.plist != NULL)
3650 {
3651 struct plt_entry **entp;
3652 struct plt_entry *ent;
3653
3654 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3655 {
3656 struct plt_entry *dent;
3657
3658 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3659 if (dent->sec == ent->sec && dent->addend == ent->addend)
3660 {
3661 dent->plt.refcount += ent->plt.refcount;
3662 *entp = ent->next;
3663 break;
3664 }
3665 if (dent == NULL)
3666 entp = &ent->next;
3667 }
3668 *entp = edir->elf.plt.plist;
3669 }
3670
3671 edir->elf.plt.plist = eind->elf.plt.plist;
3672 eind->elf.plt.plist = NULL;
3673 }
3674
3675 if (eind->elf.dynindx != -1)
3676 {
3677 if (edir->elf.dynindx != -1)
3678 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3679 edir->elf.dynstr_index);
3680 edir->elf.dynindx = eind->elf.dynindx;
3681 edir->elf.dynstr_index = eind->elf.dynstr_index;
3682 eind->elf.dynindx = -1;
3683 eind->elf.dynstr_index = 0;
3684 }
3685 }
3686
3687 /* Hook called by the linker routine which adds symbols from an object
3688 file. We use it to put .comm items in .sbss, and not .bss. */
3689
3690 static bfd_boolean
3691 ppc_elf_add_symbol_hook (bfd *abfd,
3692 struct bfd_link_info *info,
3693 Elf_Internal_Sym *sym,
3694 const char **namep ATTRIBUTE_UNUSED,
3695 flagword *flagsp ATTRIBUTE_UNUSED,
3696 asection **secp,
3697 bfd_vma *valp)
3698 {
3699 if (sym->st_shndx == SHN_COMMON
3700 && !bfd_link_relocatable (info)
3701 && is_ppc_elf (info->output_bfd)
3702 && sym->st_size <= elf_gp_size (abfd))
3703 {
3704 /* Common symbols less than or equal to -G nn bytes are automatically
3705 put into .sbss. */
3706 struct ppc_elf_link_hash_table *htab;
3707
3708 htab = ppc_elf_hash_table (info);
3709 if (htab->sbss == NULL)
3710 {
3711 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3712
3713 if (!htab->elf.dynobj)
3714 htab->elf.dynobj = abfd;
3715
3716 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3717 ".sbss",
3718 flags);
3719 if (htab->sbss == NULL)
3720 return FALSE;
3721 }
3722
3723 *secp = htab->sbss;
3724 *valp = sym->st_size;
3725 }
3726
3727 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3728 && (abfd->flags & DYNAMIC) == 0
3729 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3730 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3731
3732 return TRUE;
3733 }
3734 \f
3735 /* Find a linker generated pointer with a given addend and type. */
3736
3737 static elf_linker_section_pointers_t *
3738 elf_find_pointer_linker_section
3739 (elf_linker_section_pointers_t *linker_pointers,
3740 bfd_vma addend,
3741 elf_linker_section_t *lsect)
3742 {
3743 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3744 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3745 return linker_pointers;
3746
3747 return NULL;
3748 }
3749
3750 /* Allocate a pointer to live in a linker created section. */
3751
3752 static bfd_boolean
3753 elf_allocate_pointer_linker_section (bfd *abfd,
3754 elf_linker_section_t *lsect,
3755 struct elf_link_hash_entry *h,
3756 const Elf_Internal_Rela *rel)
3757 {
3758 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3759 elf_linker_section_pointers_t *linker_section_ptr;
3760 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3761 bfd_size_type amt;
3762
3763 BFD_ASSERT (lsect != NULL);
3764
3765 /* Is this a global symbol? */
3766 if (h != NULL)
3767 {
3768 struct ppc_elf_link_hash_entry *eh;
3769
3770 /* Has this symbol already been allocated? If so, our work is done. */
3771 eh = (struct ppc_elf_link_hash_entry *) h;
3772 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3773 rel->r_addend,
3774 lsect))
3775 return TRUE;
3776
3777 ptr_linker_section_ptr = &eh->linker_section_pointer;
3778 }
3779 else
3780 {
3781 BFD_ASSERT (is_ppc_elf (abfd));
3782
3783 /* Allocation of a pointer to a local symbol. */
3784 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3785
3786 /* Allocate a table to hold the local symbols if first time. */
3787 if (!ptr)
3788 {
3789 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3790
3791 amt = num_symbols;
3792 amt *= sizeof (elf_linker_section_pointers_t *);
3793 ptr = bfd_zalloc (abfd, amt);
3794
3795 if (!ptr)
3796 return FALSE;
3797
3798 elf_local_ptr_offsets (abfd) = ptr;
3799 }
3800
3801 /* Has this symbol already been allocated? If so, our work is done. */
3802 if (elf_find_pointer_linker_section (ptr[r_symndx],
3803 rel->r_addend,
3804 lsect))
3805 return TRUE;
3806
3807 ptr_linker_section_ptr = &ptr[r_symndx];
3808 }
3809
3810 /* Allocate space for a pointer in the linker section, and allocate
3811 a new pointer record from internal memory. */
3812 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3813 amt = sizeof (elf_linker_section_pointers_t);
3814 linker_section_ptr = bfd_alloc (abfd, amt);
3815
3816 if (!linker_section_ptr)
3817 return FALSE;
3818
3819 linker_section_ptr->next = *ptr_linker_section_ptr;
3820 linker_section_ptr->addend = rel->r_addend;
3821 linker_section_ptr->lsect = lsect;
3822 *ptr_linker_section_ptr = linker_section_ptr;
3823
3824 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3825 return FALSE;
3826 linker_section_ptr->offset = lsect->section->size;
3827 lsect->section->size += 4;
3828
3829 #ifdef DEBUG
3830 fprintf (stderr,
3831 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3832 lsect->name, (long) linker_section_ptr->offset,
3833 (long) lsect->section->size);
3834 #endif
3835
3836 return TRUE;
3837 }
3838
3839 static struct plt_entry **
3840 update_local_sym_info (bfd *abfd,
3841 Elf_Internal_Shdr *symtab_hdr,
3842 unsigned long r_symndx,
3843 int tls_type)
3844 {
3845 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3846 struct plt_entry **local_plt;
3847 char *local_got_tls_masks;
3848
3849 if (local_got_refcounts == NULL)
3850 {
3851 bfd_size_type size = symtab_hdr->sh_info;
3852
3853 size *= (sizeof (*local_got_refcounts)
3854 + sizeof (*local_plt)
3855 + sizeof (*local_got_tls_masks));
3856 local_got_refcounts = bfd_zalloc (abfd, size);
3857 if (local_got_refcounts == NULL)
3858 return NULL;
3859 elf_local_got_refcounts (abfd) = local_got_refcounts;
3860 }
3861
3862 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3863 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3864 local_got_tls_masks[r_symndx] |= tls_type;
3865 if (tls_type != PLT_IFUNC)
3866 local_got_refcounts[r_symndx] += 1;
3867 return local_plt + r_symndx;
3868 }
3869
3870 static bfd_boolean
3871 update_plt_info (bfd *abfd, struct plt_entry **plist,
3872 asection *sec, bfd_vma addend)
3873 {
3874 struct plt_entry *ent;
3875
3876 if (addend < 32768)
3877 sec = NULL;
3878 for (ent = *plist; ent != NULL; ent = ent->next)
3879 if (ent->sec == sec && ent->addend == addend)
3880 break;
3881 if (ent == NULL)
3882 {
3883 bfd_size_type amt = sizeof (*ent);
3884 ent = bfd_alloc (abfd, amt);
3885 if (ent == NULL)
3886 return FALSE;
3887 ent->next = *plist;
3888 ent->sec = sec;
3889 ent->addend = addend;
3890 ent->plt.refcount = 0;
3891 *plist = ent;
3892 }
3893 ent->plt.refcount += 1;
3894 return TRUE;
3895 }
3896
3897 static struct plt_entry *
3898 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3899 {
3900 struct plt_entry *ent;
3901
3902 if (addend < 32768)
3903 sec = NULL;
3904 for (ent = *plist; ent != NULL; ent = ent->next)
3905 if (ent->sec == sec && ent->addend == addend)
3906 break;
3907 return ent;
3908 }
3909
3910 static bfd_boolean
3911 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3912 {
3913 return (r_type == R_PPC_PLTREL24
3914 || r_type == R_PPC_LOCAL24PC
3915 || r_type == R_PPC_REL24
3916 || r_type == R_PPC_REL14
3917 || r_type == R_PPC_REL14_BRTAKEN
3918 || r_type == R_PPC_REL14_BRNTAKEN
3919 || r_type == R_PPC_ADDR24
3920 || r_type == R_PPC_ADDR14
3921 || r_type == R_PPC_ADDR14_BRTAKEN
3922 || r_type == R_PPC_ADDR14_BRNTAKEN
3923 || r_type == R_PPC_VLE_REL24);
3924 }
3925
3926 static void
3927 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3928 {
3929 _bfd_error_handler
3930 /* xgettext:c-format */
3931 (_("%pB: relocation %s cannot be used when making a shared object"),
3932 abfd,
3933 ppc_elf_howto_table[r_type]->name);
3934 bfd_set_error (bfd_error_bad_value);
3935 }
3936
3937 /* Look through the relocs for a section during the first phase, and
3938 allocate space in the global offset table or procedure linkage
3939 table. */
3940
3941 static bfd_boolean
3942 ppc_elf_check_relocs (bfd *abfd,
3943 struct bfd_link_info *info,
3944 asection *sec,
3945 const Elf_Internal_Rela *relocs)
3946 {
3947 struct ppc_elf_link_hash_table *htab;
3948 Elf_Internal_Shdr *symtab_hdr;
3949 struct elf_link_hash_entry **sym_hashes;
3950 const Elf_Internal_Rela *rel;
3951 const Elf_Internal_Rela *rel_end;
3952 asection *got2, *sreloc;
3953 struct elf_link_hash_entry *tga;
3954
3955 if (bfd_link_relocatable (info))
3956 return TRUE;
3957
3958 /* Don't do anything special with non-loaded, non-alloced sections.
3959 In particular, any relocs in such sections should not affect GOT
3960 and PLT reference counting (ie. we don't allow them to create GOT
3961 or PLT entries), there's no possibility or desire to optimize TLS
3962 relocs, and there's not much point in propagating relocs to shared
3963 libs that the dynamic linker won't relocate. */
3964 if ((sec->flags & SEC_ALLOC) == 0)
3965 return TRUE;
3966
3967 #ifdef DEBUG
3968 _bfd_error_handler ("ppc_elf_check_relocs called for section %pA in %pB",
3969 sec, abfd);
3970 #endif
3971
3972 BFD_ASSERT (is_ppc_elf (abfd));
3973
3974 /* Initialize howto table if not already done. */
3975 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3976 ppc_elf_howto_init ();
3977
3978 htab = ppc_elf_hash_table (info);
3979 if (htab->glink == NULL)
3980 {
3981 if (htab->elf.dynobj == NULL)
3982 htab->elf.dynobj = abfd;
3983 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3984 return FALSE;
3985 }
3986 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3987 FALSE, FALSE, TRUE);
3988 symtab_hdr = &elf_symtab_hdr (abfd);
3989 sym_hashes = elf_sym_hashes (abfd);
3990 got2 = bfd_get_section_by_name (abfd, ".got2");
3991 sreloc = NULL;
3992
3993 rel_end = relocs + sec->reloc_count;
3994 for (rel = relocs; rel < rel_end; rel++)
3995 {
3996 unsigned long r_symndx;
3997 enum elf_ppc_reloc_type r_type;
3998 struct elf_link_hash_entry *h;
3999 int tls_type;
4000 struct plt_entry **ifunc;
4001
4002 r_symndx = ELF32_R_SYM (rel->r_info);
4003 if (r_symndx < symtab_hdr->sh_info)
4004 h = NULL;
4005 else
4006 {
4007 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4008 while (h->root.type == bfd_link_hash_indirect
4009 || h->root.type == bfd_link_hash_warning)
4010 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4011 }
4012
4013 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4014 This shows up in particular in an R_PPC_ADDR32 in the eabi
4015 startup code. */
4016 if (h != NULL
4017 && htab->elf.sgot == NULL
4018 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4019 {
4020 if (htab->elf.dynobj == NULL)
4021 htab->elf.dynobj = abfd;
4022 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4023 return FALSE;
4024 BFD_ASSERT (h == htab->elf.hgot);
4025 }
4026
4027 tls_type = 0;
4028 r_type = ELF32_R_TYPE (rel->r_info);
4029 ifunc = NULL;
4030 if (h == NULL && !htab->is_vxworks)
4031 {
4032 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4033 abfd, r_symndx);
4034 if (isym == NULL)
4035 return FALSE;
4036
4037 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4038 {
4039 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4040 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4041 PLT_IFUNC);
4042 if (ifunc == NULL)
4043 return FALSE;
4044
4045 /* STT_GNU_IFUNC symbols must have a PLT entry;
4046 In a non-pie executable even when there are
4047 no plt calls. */
4048 if (!bfd_link_pic (info)
4049 || is_branch_reloc (r_type))
4050 {
4051 bfd_vma addend = 0;
4052 if (r_type == R_PPC_PLTREL24)
4053 {
4054 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4055 if (bfd_link_pic (info))
4056 addend = rel->r_addend;
4057 }
4058 if (!update_plt_info (abfd, ifunc, got2, addend))
4059 return FALSE;
4060 }
4061 }
4062 }
4063
4064 if (!htab->is_vxworks
4065 && is_branch_reloc (r_type)
4066 && h != NULL
4067 && h == tga)
4068 {
4069 if (rel != relocs
4070 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4071 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4072 /* We have a new-style __tls_get_addr call with a marker
4073 reloc. */
4074 ;
4075 else
4076 /* Mark this section as having an old-style call. */
4077 sec->has_tls_get_addr_call = 1;
4078 }
4079
4080 switch (r_type)
4081 {
4082 case R_PPC_TLSGD:
4083 case R_PPC_TLSLD:
4084 /* These special tls relocs tie a call to __tls_get_addr with
4085 its parameter symbol. */
4086 break;
4087
4088 case R_PPC_GOT_TLSLD16:
4089 case R_PPC_GOT_TLSLD16_LO:
4090 case R_PPC_GOT_TLSLD16_HI:
4091 case R_PPC_GOT_TLSLD16_HA:
4092 tls_type = TLS_TLS | TLS_LD;
4093 goto dogottls;
4094
4095 case R_PPC_GOT_TLSGD16:
4096 case R_PPC_GOT_TLSGD16_LO:
4097 case R_PPC_GOT_TLSGD16_HI:
4098 case R_PPC_GOT_TLSGD16_HA:
4099 tls_type = TLS_TLS | TLS_GD;
4100 goto dogottls;
4101
4102 case R_PPC_GOT_TPREL16:
4103 case R_PPC_GOT_TPREL16_LO:
4104 case R_PPC_GOT_TPREL16_HI:
4105 case R_PPC_GOT_TPREL16_HA:
4106 if (bfd_link_dll (info))
4107 info->flags |= DF_STATIC_TLS;
4108 tls_type = TLS_TLS | TLS_TPREL;
4109 goto dogottls;
4110
4111 case R_PPC_GOT_DTPREL16:
4112 case R_PPC_GOT_DTPREL16_LO:
4113 case R_PPC_GOT_DTPREL16_HI:
4114 case R_PPC_GOT_DTPREL16_HA:
4115 tls_type = TLS_TLS | TLS_DTPREL;
4116 dogottls:
4117 sec->has_tls_reloc = 1;
4118 /* Fall through. */
4119
4120 /* GOT16 relocations */
4121 case R_PPC_GOT16:
4122 case R_PPC_GOT16_LO:
4123 case R_PPC_GOT16_HI:
4124 case R_PPC_GOT16_HA:
4125 /* This symbol requires a global offset table entry. */
4126 if (htab->elf.sgot == NULL)
4127 {
4128 if (htab->elf.dynobj == NULL)
4129 htab->elf.dynobj = abfd;
4130 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4131 return FALSE;
4132 }
4133 if (h != NULL)
4134 {
4135 h->got.refcount += 1;
4136 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4137 }
4138 else
4139 /* This is a global offset table entry for a local symbol. */
4140 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4141 return FALSE;
4142
4143 /* We may also need a plt entry if the symbol turns out to be
4144 an ifunc. */
4145 if (h != NULL && !bfd_link_pic (info))
4146 {
4147 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4148 return FALSE;
4149 }
4150 break;
4151
4152 /* Indirect .sdata relocation. */
4153 case R_PPC_EMB_SDAI16:
4154 if (bfd_link_pic (info))
4155 {
4156 bad_shared_reloc (abfd, r_type);
4157 return FALSE;
4158 }
4159 htab->sdata[0].sym->ref_regular = 1;
4160 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4161 h, rel))
4162 return FALSE;
4163 if (h != NULL)
4164 {
4165 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4166 h->non_got_ref = TRUE;
4167 }
4168 break;
4169
4170 /* Indirect .sdata2 relocation. */
4171 case R_PPC_EMB_SDA2I16:
4172 if (bfd_link_pic (info))
4173 {
4174 bad_shared_reloc (abfd, r_type);
4175 return FALSE;
4176 }
4177 htab->sdata[1].sym->ref_regular = 1;
4178 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4179 h, rel))
4180 return FALSE;
4181 if (h != NULL)
4182 {
4183 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4184 h->non_got_ref = TRUE;
4185 }
4186 break;
4187
4188 case R_PPC_SDAREL16:
4189 htab->sdata[0].sym->ref_regular = 1;
4190 /* Fall through. */
4191
4192 case R_PPC_VLE_SDAREL_LO16A:
4193 case R_PPC_VLE_SDAREL_LO16D:
4194 case R_PPC_VLE_SDAREL_HI16A:
4195 case R_PPC_VLE_SDAREL_HI16D:
4196 case R_PPC_VLE_SDAREL_HA16A:
4197 case R_PPC_VLE_SDAREL_HA16D:
4198 if (h != NULL)
4199 {
4200 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4201 h->non_got_ref = TRUE;
4202 }
4203 break;
4204
4205 case R_PPC_VLE_REL8:
4206 case R_PPC_VLE_REL15:
4207 case R_PPC_VLE_REL24:
4208 case R_PPC_VLE_LO16A:
4209 case R_PPC_VLE_LO16D:
4210 case R_PPC_VLE_HI16A:
4211 case R_PPC_VLE_HI16D:
4212 case R_PPC_VLE_HA16A:
4213 case R_PPC_VLE_HA16D:
4214 case R_PPC_VLE_ADDR20:
4215 break;
4216
4217 case R_PPC_EMB_SDA2REL:
4218 if (bfd_link_pic (info))
4219 {
4220 bad_shared_reloc (abfd, r_type);
4221 return FALSE;
4222 }
4223 htab->sdata[1].sym->ref_regular = 1;
4224 if (h != NULL)
4225 {
4226 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4227 h->non_got_ref = TRUE;
4228 }
4229 break;
4230
4231 case R_PPC_VLE_SDA21_LO:
4232 case R_PPC_VLE_SDA21:
4233 case R_PPC_EMB_SDA21:
4234 case R_PPC_EMB_RELSDA:
4235 if (bfd_link_pic (info))
4236 {
4237 bad_shared_reloc (abfd, r_type);
4238 return FALSE;
4239 }
4240 if (h != NULL)
4241 {
4242 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4243 h->non_got_ref = TRUE;
4244 }
4245 break;
4246
4247 case R_PPC_EMB_NADDR32:
4248 case R_PPC_EMB_NADDR16:
4249 case R_PPC_EMB_NADDR16_LO:
4250 case R_PPC_EMB_NADDR16_HI:
4251 case R_PPC_EMB_NADDR16_HA:
4252 if (bfd_link_pic (info))
4253 {
4254 bad_shared_reloc (abfd, r_type);
4255 return FALSE;
4256 }
4257 if (h != NULL)
4258 h->non_got_ref = TRUE;
4259 break;
4260
4261 case R_PPC_PLTREL24:
4262 if (h == NULL)
4263 break;
4264 /* Fall through */
4265 case R_PPC_PLT32:
4266 case R_PPC_PLTREL32:
4267 case R_PPC_PLT16_LO:
4268 case R_PPC_PLT16_HI:
4269 case R_PPC_PLT16_HA:
4270 #ifdef DEBUG
4271 fprintf (stderr, "Reloc requires a PLT entry\n");
4272 #endif
4273 /* This symbol requires a procedure linkage table entry. */
4274 if (h == NULL)
4275 {
4276 if (ifunc == NULL)
4277 {
4278 /* It does not make sense to have a procedure linkage
4279 table entry for a non-ifunc local symbol. */
4280 info->callbacks->einfo
4281 /* xgettext:c-format */
4282 (_("%H: %s reloc against local symbol\n"),
4283 abfd, sec, rel->r_offset,
4284 ppc_elf_howto_table[r_type]->name);
4285 bfd_set_error (bfd_error_bad_value);
4286 return FALSE;
4287 }
4288 }
4289 else
4290 {
4291 bfd_vma addend = 0;
4292
4293 if (r_type == R_PPC_PLTREL24)
4294 {
4295 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4296 if (bfd_link_pic (info))
4297 addend = rel->r_addend;
4298 }
4299 h->needs_plt = 1;
4300 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4301 return FALSE;
4302 }
4303 break;
4304
4305 /* The following relocations don't need to propagate the
4306 relocation if linking a shared object since they are
4307 section relative. */
4308 case R_PPC_SECTOFF:
4309 case R_PPC_SECTOFF_LO:
4310 case R_PPC_SECTOFF_HI:
4311 case R_PPC_SECTOFF_HA:
4312 case R_PPC_DTPREL16:
4313 case R_PPC_DTPREL16_LO:
4314 case R_PPC_DTPREL16_HI:
4315 case R_PPC_DTPREL16_HA:
4316 case R_PPC_TOC16:
4317 break;
4318
4319 case R_PPC_REL16:
4320 case R_PPC_REL16_LO:
4321 case R_PPC_REL16_HI:
4322 case R_PPC_REL16_HA:
4323 case R_PPC_REL16DX_HA:
4324 ppc_elf_tdata (abfd)->has_rel16 = 1;
4325 break;
4326
4327 /* These are just markers. */
4328 case R_PPC_TLS:
4329 case R_PPC_EMB_MRKREF:
4330 case R_PPC_NONE:
4331 case R_PPC_max:
4332 case R_PPC_RELAX:
4333 case R_PPC_RELAX_PLT:
4334 case R_PPC_RELAX_PLTREL24:
4335 case R_PPC_16DX_HA:
4336 break;
4337
4338 /* These should only appear in dynamic objects. */
4339 case R_PPC_COPY:
4340 case R_PPC_GLOB_DAT:
4341 case R_PPC_JMP_SLOT:
4342 case R_PPC_RELATIVE:
4343 case R_PPC_IRELATIVE:
4344 break;
4345
4346 /* These aren't handled yet. We'll report an error later. */
4347 case R_PPC_ADDR30:
4348 case R_PPC_EMB_RELSEC16:
4349 case R_PPC_EMB_RELST_LO:
4350 case R_PPC_EMB_RELST_HI:
4351 case R_PPC_EMB_RELST_HA:
4352 case R_PPC_EMB_BIT_FLD:
4353 break;
4354
4355 /* This refers only to functions defined in the shared library. */
4356 case R_PPC_LOCAL24PC:
4357 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4358 {
4359 htab->plt_type = PLT_OLD;
4360 htab->old_bfd = abfd;
4361 }
4362 if (h != NULL && h->type == STT_GNU_IFUNC)
4363 {
4364 h->needs_plt = 1;
4365 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4366 return FALSE;
4367 }
4368 break;
4369
4370 /* This relocation describes the C++ object vtable hierarchy.
4371 Reconstruct it for later use during GC. */
4372 case R_PPC_GNU_VTINHERIT:
4373 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4374 return FALSE;
4375 break;
4376
4377 /* This relocation describes which C++ vtable entries are actually
4378 used. Record for later use during GC. */
4379 case R_PPC_GNU_VTENTRY:
4380 BFD_ASSERT (h != NULL);
4381 if (h != NULL
4382 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4383 return FALSE;
4384 break;
4385
4386 /* We shouldn't really be seeing TPREL32. */
4387 case R_PPC_TPREL32:
4388 case R_PPC_TPREL16:
4389 case R_PPC_TPREL16_LO:
4390 case R_PPC_TPREL16_HI:
4391 case R_PPC_TPREL16_HA:
4392 if (bfd_link_dll (info))
4393 info->flags |= DF_STATIC_TLS;
4394 goto dodyn;
4395
4396 /* Nor these. */
4397 case R_PPC_DTPMOD32:
4398 case R_PPC_DTPREL32:
4399 goto dodyn;
4400
4401 case R_PPC_REL32:
4402 if (h == NULL
4403 && got2 != NULL
4404 && (sec->flags & SEC_CODE) != 0
4405 && bfd_link_pic (info)
4406 && htab->plt_type == PLT_UNSET)
4407 {
4408 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4409 the start of a function, which assembles to a REL32
4410 reference to .got2. If we detect one of these, then
4411 force the old PLT layout because the linker cannot
4412 reliably deduce the GOT pointer value needed for
4413 PLT call stubs. */
4414 asection *s;
4415 Elf_Internal_Sym *isym;
4416
4417 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4418 abfd, r_symndx);
4419 if (isym == NULL)
4420 return FALSE;
4421
4422 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4423 if (s == got2)
4424 {
4425 htab->plt_type = PLT_OLD;
4426 htab->old_bfd = abfd;
4427 }
4428 }
4429 if (h == NULL || h == htab->elf.hgot)
4430 break;
4431 /* fall through */
4432
4433 case R_PPC_ADDR32:
4434 case R_PPC_ADDR16:
4435 case R_PPC_ADDR16_LO:
4436 case R_PPC_ADDR16_HI:
4437 case R_PPC_ADDR16_HA:
4438 case R_PPC_UADDR32:
4439 case R_PPC_UADDR16:
4440 if (h != NULL && !bfd_link_pic (info))
4441 {
4442 /* We may need a plt entry if the symbol turns out to be
4443 a function defined in a dynamic object. */
4444 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4445 return FALSE;
4446
4447 /* We may need a copy reloc too. */
4448 h->non_got_ref = 1;
4449 h->pointer_equality_needed = 1;
4450 if (r_type == R_PPC_ADDR16_HA)
4451 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4452 if (r_type == R_PPC_ADDR16_LO)
4453 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4454 }
4455 goto dodyn;
4456
4457 case R_PPC_REL24:
4458 case R_PPC_REL14:
4459 case R_PPC_REL14_BRTAKEN:
4460 case R_PPC_REL14_BRNTAKEN:
4461 if (h == NULL)
4462 break;
4463 if (h == htab->elf.hgot)
4464 {
4465 if (htab->plt_type == PLT_UNSET)
4466 {
4467 htab->plt_type = PLT_OLD;
4468 htab->old_bfd = abfd;
4469 }
4470 break;
4471 }
4472 /* fall through */
4473
4474 case R_PPC_ADDR24:
4475 case R_PPC_ADDR14:
4476 case R_PPC_ADDR14_BRTAKEN:
4477 case R_PPC_ADDR14_BRNTAKEN:
4478 if (h != NULL && !bfd_link_pic (info))
4479 {
4480 /* We may need a plt entry if the symbol turns out to be
4481 a function defined in a dynamic object. */
4482 h->needs_plt = 1;
4483 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4484 return FALSE;
4485 break;
4486 }
4487
4488 dodyn:
4489 /* If we are creating a shared library, and this is a reloc
4490 against a global symbol, or a non PC relative reloc
4491 against a local symbol, then we need to copy the reloc
4492 into the shared library. However, if we are linking with
4493 -Bsymbolic, we do not need to copy a reloc against a
4494 global symbol which is defined in an object we are
4495 including in the link (i.e., DEF_REGULAR is set). At
4496 this point we have not seen all the input files, so it is
4497 possible that DEF_REGULAR is not set now but will be set
4498 later (it is never cleared). In case of a weak definition,
4499 DEF_REGULAR may be cleared later by a strong definition in
4500 a shared library. We account for that possibility below by
4501 storing information in the dyn_relocs field of the hash
4502 table entry. A similar situation occurs when creating
4503 shared libraries and symbol visibility changes render the
4504 symbol local.
4505
4506 If on the other hand, we are creating an executable, we
4507 may need to keep relocations for symbols satisfied by a
4508 dynamic library if we manage to avoid copy relocs for the
4509 symbol. */
4510 if ((bfd_link_pic (info)
4511 && (must_be_dyn_reloc (info, r_type)
4512 || (h != NULL
4513 && (!SYMBOLIC_BIND (info, h)
4514 || h->root.type == bfd_link_hash_defweak
4515 || !h->def_regular))))
4516 || (ELIMINATE_COPY_RELOCS
4517 && !bfd_link_pic (info)
4518 && h != NULL
4519 && (h->root.type == bfd_link_hash_defweak
4520 || !h->def_regular)))
4521 {
4522 #ifdef DEBUG
4523 fprintf (stderr,
4524 "ppc_elf_check_relocs needs to "
4525 "create relocation for %s\n",
4526 (h && h->root.root.string
4527 ? h->root.root.string : "<unknown>"));
4528 #endif
4529 if (sreloc == NULL)
4530 {
4531 if (htab->elf.dynobj == NULL)
4532 htab->elf.dynobj = abfd;
4533
4534 sreloc = _bfd_elf_make_dynamic_reloc_section
4535 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4536
4537 if (sreloc == NULL)
4538 return FALSE;
4539 }
4540
4541 /* If this is a global symbol, we count the number of
4542 relocations we need for this symbol. */
4543 if (h != NULL)
4544 {
4545 struct elf_dyn_relocs *p;
4546 struct elf_dyn_relocs **rel_head;
4547
4548 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4549 p = *rel_head;
4550 if (p == NULL || p->sec != sec)
4551 {
4552 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4553 if (p == NULL)
4554 return FALSE;
4555 p->next = *rel_head;
4556 *rel_head = p;
4557 p->sec = sec;
4558 p->count = 0;
4559 p->pc_count = 0;
4560 }
4561 p->count += 1;
4562 if (!must_be_dyn_reloc (info, r_type))
4563 p->pc_count += 1;
4564 }
4565 else
4566 {
4567 /* Track dynamic relocs needed for local syms too.
4568 We really need local syms available to do this
4569 easily. Oh well. */
4570 struct ppc_dyn_relocs *p;
4571 struct ppc_dyn_relocs **rel_head;
4572 bfd_boolean is_ifunc;
4573 asection *s;
4574 void *vpp;
4575 Elf_Internal_Sym *isym;
4576
4577 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4578 abfd, r_symndx);
4579 if (isym == NULL)
4580 return FALSE;
4581
4582 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4583 if (s == NULL)
4584 s = sec;
4585
4586 vpp = &elf_section_data (s)->local_dynrel;
4587 rel_head = (struct ppc_dyn_relocs **) vpp;
4588 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4589 p = *rel_head;
4590 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4591 p = p->next;
4592 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4593 {
4594 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4595 if (p == NULL)
4596 return FALSE;
4597 p->next = *rel_head;
4598 *rel_head = p;
4599 p->sec = sec;
4600 p->ifunc = is_ifunc;
4601 p->count = 0;
4602 }
4603 p->count += 1;
4604 }
4605 }
4606
4607 break;
4608 }
4609 }
4610
4611 return TRUE;
4612 }
4613 \f
4614 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4615 and OBFD, and merge non-conflicting ones. */
4616 void
4617 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4618 {
4619 bfd *obfd = info->output_bfd;
4620 obj_attribute *in_attr, *in_attrs;
4621 obj_attribute *out_attr, *out_attrs;
4622
4623 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4624 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4625
4626 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4627 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4628
4629 if (in_attr->i != out_attr->i)
4630 {
4631 int in_fp = in_attr->i & 3;
4632 int out_fp = out_attr->i & 3;
4633
4634 if (in_fp == 0)
4635 ;
4636 else if (out_fp == 0)
4637 {
4638 out_attr->type = 1;
4639 out_attr->i ^= in_fp;
4640 }
4641 else if (out_fp != 2 && in_fp == 2)
4642 _bfd_error_handler
4643 /* xgettext:c-format */
4644 (_("warning: %pB uses hard float, %pB uses soft float"), obfd, ibfd);
4645 else if (out_fp == 2 && in_fp != 2)
4646 _bfd_error_handler
4647 /* xgettext:c-format */
4648 (_("warning: %pB uses hard float, %pB uses soft float"), ibfd, obfd);
4649 else if (out_fp == 1 && in_fp == 3)
4650 _bfd_error_handler
4651 /* xgettext:c-format */
4652 (_("warning: %pB uses double-precision hard float, "
4653 "%pB uses single-precision hard float"), obfd, ibfd);
4654 else if (out_fp == 3 && in_fp == 1)
4655 _bfd_error_handler
4656 /* xgettext:c-format */
4657 (_("warning: %pB uses double-precision hard float, "
4658 "%pB uses single-precision hard float"), ibfd, obfd);
4659
4660 in_fp = in_attr->i & 0xc;
4661 out_fp = out_attr->i & 0xc;
4662 if (in_fp == 0)
4663 ;
4664 else if (out_fp == 0)
4665 {
4666 out_attr->type = 1;
4667 out_attr->i ^= in_fp;
4668 }
4669 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4670 _bfd_error_handler
4671 /* xgettext:c-format */
4672 (_("warning: %pB uses 64-bit long double, "
4673 "%pB uses 128-bit long double"), ibfd, obfd);
4674 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4675 _bfd_error_handler
4676 /* xgettext:c-format */
4677 (_("warning: %pB uses 64-bit long double, "
4678 "%pB uses 128-bit long double"), obfd, ibfd);
4679 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4680 _bfd_error_handler
4681 /* xgettext:c-format */
4682 (_("warning: %pB uses IBM long double, "
4683 "%pB uses IEEE long double"), ibfd, obfd);
4684 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4685 _bfd_error_handler
4686 /* xgettext:c-format */
4687 (_("warning: %pB uses IBM long double, "
4688 "%pB uses IEEE long double"), obfd, ibfd);
4689 }
4690 }
4691
4692 /* Merge object attributes from IBFD into OBFD. Warn if
4693 there are conflicting attributes. */
4694 static bfd_boolean
4695 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4696 {
4697 bfd *obfd;
4698 obj_attribute *in_attr, *in_attrs;
4699 obj_attribute *out_attr, *out_attrs;
4700
4701 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4702
4703 obfd = info->output_bfd;
4704 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4705 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4706
4707 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4708 merge non-conflicting ones. */
4709 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4710 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4711 if (in_attr->i != out_attr->i)
4712 {
4713 int in_vec = in_attr->i & 3;
4714 int out_vec = out_attr->i & 3;
4715
4716 if (in_vec == 0)
4717 ;
4718 else if (out_vec == 0)
4719 {
4720 out_attr->type = 1;
4721 out_attr->i = in_vec;
4722 }
4723 /* For now, allow generic to transition to AltiVec or SPE
4724 without a warning. If GCC marked files with their stack
4725 alignment and used don't-care markings for files which are
4726 not affected by the vector ABI, we could warn about this
4727 case too. */
4728 else if (in_vec == 1)
4729 ;
4730 else if (out_vec == 1)
4731 {
4732 out_attr->type = 1;
4733 out_attr->i = in_vec;
4734 }
4735 else if (out_vec < in_vec)
4736 _bfd_error_handler
4737 /* xgettext:c-format */
4738 (_("warning: %pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
4739 obfd, ibfd);
4740 else if (out_vec > in_vec)
4741 _bfd_error_handler
4742 /* xgettext:c-format */
4743 (_("warning: %pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
4744 ibfd, obfd);
4745 }
4746
4747 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4748 and merge non-conflicting ones. */
4749 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4750 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4751 if (in_attr->i != out_attr->i)
4752 {
4753 int in_struct = in_attr->i & 3;
4754 int out_struct = out_attr->i & 3;
4755
4756 if (in_struct == 0 || in_struct == 3)
4757 ;
4758 else if (out_struct == 0)
4759 {
4760 out_attr->type = 1;
4761 out_attr->i = in_struct;
4762 }
4763 else if (out_struct < in_struct)
4764 _bfd_error_handler
4765 /* xgettext:c-format */
4766 (_("warning: %pB uses r3/r4 for small structure returns, "
4767 "%pB uses memory"), obfd, ibfd);
4768 else if (out_struct > in_struct)
4769 _bfd_error_handler
4770 /* xgettext:c-format */
4771 (_("warning: %pB uses r3/r4 for small structure returns, "
4772 "%pB uses memory"), ibfd, obfd);
4773 }
4774
4775 /* Merge Tag_compatibility attributes and any common GNU ones. */
4776 _bfd_elf_merge_object_attributes (ibfd, info);
4777
4778 return TRUE;
4779 }
4780
4781 /* Merge backend specific data from an object file to the output
4782 object file when linking. */
4783
4784 static bfd_boolean
4785 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4786 {
4787 bfd *obfd = info->output_bfd;
4788 flagword old_flags;
4789 flagword new_flags;
4790 bfd_boolean error;
4791
4792 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4793 return TRUE;
4794
4795 /* Check if we have the same endianness. */
4796 if (! _bfd_generic_verify_endian_match (ibfd, info))
4797 return FALSE;
4798
4799 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4800 return FALSE;
4801
4802 new_flags = elf_elfheader (ibfd)->e_flags;
4803 old_flags = elf_elfheader (obfd)->e_flags;
4804 if (!elf_flags_init (obfd))
4805 {
4806 /* First call, no flags set. */
4807 elf_flags_init (obfd) = TRUE;
4808 elf_elfheader (obfd)->e_flags = new_flags;
4809 }
4810
4811 /* Compatible flags are ok. */
4812 else if (new_flags == old_flags)
4813 ;
4814
4815 /* Incompatible flags. */
4816 else
4817 {
4818 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4819 to be linked with either. */
4820 error = FALSE;
4821 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4822 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4823 {
4824 error = TRUE;
4825 _bfd_error_handler
4826 (_("%pB: compiled with -mrelocatable and linked with "
4827 "modules compiled normally"), ibfd);
4828 }
4829 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4830 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4831 {
4832 error = TRUE;
4833 _bfd_error_handler
4834 (_("%pB: compiled normally and linked with "
4835 "modules compiled with -mrelocatable"), ibfd);
4836 }
4837
4838 /* The output is -mrelocatable-lib iff both the input files are. */
4839 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4840 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4841
4842 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4843 but each input file is either -mrelocatable or -mrelocatable-lib. */
4844 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4845 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4846 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4847 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4848
4849 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4850 any module uses it. */
4851 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4852
4853 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4854 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4855
4856 /* Warn about any other mismatches. */
4857 if (new_flags != old_flags)
4858 {
4859 error = TRUE;
4860 _bfd_error_handler
4861 /* xgettext:c-format */
4862 (_("%pB: uses different e_flags (%#x) fields "
4863 "than previous modules (%#x)"),
4864 ibfd, new_flags, old_flags);
4865 }
4866
4867 if (error)
4868 {
4869 bfd_set_error (bfd_error_bad_value);
4870 return FALSE;
4871 }
4872 }
4873
4874 return TRUE;
4875 }
4876
4877 static void
4878 ppc_elf_vle_split16 (bfd *input_bfd,
4879 asection *input_section,
4880 unsigned long offset,
4881 bfd_byte *loc,
4882 bfd_vma value,
4883 split16_format_type split16_format,
4884 bfd_boolean fixup)
4885 {
4886 unsigned int insn, opcode, top5;
4887
4888 insn = bfd_get_32 (input_bfd, loc);
4889 opcode = insn & 0xfc00f800;
4890 if (opcode == E_OR2I_INSN
4891 || opcode == E_AND2I_DOT_INSN
4892 || opcode == E_OR2IS_INSN
4893 || opcode == E_LIS_INSN
4894 || opcode == E_AND2IS_DOT_INSN)
4895 {
4896 if (split16_format != split16a_type)
4897 {
4898 if (fixup)
4899 split16_format = split16a_type;
4900 else
4901 _bfd_error_handler
4902 /* xgettext:c-format */
4903 (_("%pB(%pA+0x%lx): expected 16A style relocation on 0x%08x insn"),
4904 input_bfd, input_section, offset, opcode);
4905 }
4906 }
4907 else if (opcode == E_ADD2I_DOT_INSN
4908 || opcode == E_ADD2IS_INSN
4909 || opcode == E_CMP16I_INSN
4910 || opcode == E_MULL2I_INSN
4911 || opcode == E_CMPL16I_INSN
4912 || opcode == E_CMPH16I_INSN
4913 || opcode == E_CMPHL16I_INSN)
4914 {
4915 if (split16_format != split16d_type)
4916 {
4917 if (fixup)
4918 split16_format = split16d_type;
4919 else
4920 _bfd_error_handler
4921 /* xgettext:c-format */
4922 (_("%pB(%pA+0x%lx): expected 16D style relocation on 0x%08x insn"),
4923 input_bfd, input_section, offset, opcode);
4924 }
4925 }
4926 top5 = value & 0xf800;
4927 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
4928 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
4929 insn |= top5;
4930 insn |= value & 0x7ff;
4931 bfd_put_32 (input_bfd, insn, loc);
4932 }
4933
4934 static void
4935 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
4936 {
4937 unsigned int insn;
4938
4939 insn = bfd_get_32 (output_bfd, loc);
4940 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
4941 /* Top 4 bits of value to 17..20. */
4942 insn |= (value & 0xf0000) >> 5;
4943 /* Next 5 bits of the value to 11..15. */
4944 insn |= (value & 0xf800) << 5;
4945 /* And the final 11 bits of the value to bits 21 to 31. */
4946 insn |= value & 0x7ff;
4947 bfd_put_32 (output_bfd, insn, loc);
4948 }
4949
4950 \f
4951 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4952 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4953 int
4954 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4955 struct bfd_link_info *info)
4956 {
4957 struct ppc_elf_link_hash_table *htab;
4958 flagword flags;
4959
4960 htab = ppc_elf_hash_table (info);
4961
4962 if (htab->plt_type == PLT_UNSET)
4963 {
4964 struct elf_link_hash_entry *h;
4965
4966 if (htab->params->plt_style == PLT_OLD)
4967 htab->plt_type = PLT_OLD;
4968 else if (bfd_link_pic (info)
4969 && htab->elf.dynamic_sections_created
4970 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4971 FALSE, FALSE, TRUE)) != NULL
4972 && (h->type == STT_FUNC
4973 || h->needs_plt)
4974 && h->ref_regular
4975 && !(SYMBOL_CALLS_LOCAL (info, h)
4976 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
4977 {
4978 /* Profiling of shared libs (and pies) is not supported with
4979 secure plt, because ppc32 does profiling before a
4980 function prologue and a secure plt pic call stubs needs
4981 r30 to be set up. */
4982 htab->plt_type = PLT_OLD;
4983 }
4984 else
4985 {
4986 bfd *ibfd;
4987 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4988
4989 /* Look through the reloc flags left by ppc_elf_check_relocs.
4990 Use the old style bss plt if a file makes plt calls
4991 without using the new relocs, and if ld isn't given
4992 --secure-plt and we never see REL16 relocs. */
4993 if (plt_type == PLT_UNSET)
4994 plt_type = PLT_OLD;
4995 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4996 if (is_ppc_elf (ibfd))
4997 {
4998 if (ppc_elf_tdata (ibfd)->has_rel16)
4999 plt_type = PLT_NEW;
5000 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5001 {
5002 plt_type = PLT_OLD;
5003 htab->old_bfd = ibfd;
5004 break;
5005 }
5006 }
5007 htab->plt_type = plt_type;
5008 }
5009 }
5010 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5011 {
5012 if (htab->old_bfd != NULL)
5013 _bfd_error_handler (_("bss-plt forced due to %pB"), htab->old_bfd);
5014 else
5015 _bfd_error_handler (_("bss-plt forced by profiling"));
5016 }
5017
5018 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5019
5020 if (htab->plt_type == PLT_NEW)
5021 {
5022 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5023 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5024
5025 /* The new PLT is a loaded section. */
5026 if (htab->elf.splt != NULL
5027 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5028 return -1;
5029
5030 /* The new GOT is not executable. */
5031 if (htab->elf.sgot != NULL
5032 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5033 return -1;
5034 }
5035 else
5036 {
5037 /* Stop an unused .glink section from affecting .text alignment. */
5038 if (htab->glink != NULL
5039 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5040 return -1;
5041 }
5042 return htab->plt_type == PLT_NEW;
5043 }
5044 \f
5045 /* Return the section that should be marked against GC for a given
5046 relocation. */
5047
5048 static asection *
5049 ppc_elf_gc_mark_hook (asection *sec,
5050 struct bfd_link_info *info,
5051 Elf_Internal_Rela *rel,
5052 struct elf_link_hash_entry *h,
5053 Elf_Internal_Sym *sym)
5054 {
5055 if (h != NULL)
5056 switch (ELF32_R_TYPE (rel->r_info))
5057 {
5058 case R_PPC_GNU_VTINHERIT:
5059 case R_PPC_GNU_VTENTRY:
5060 return NULL;
5061 }
5062
5063 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5064 }
5065 \f
5066 /* Set plt output section type, htab->tls_get_addr, and call the
5067 generic ELF tls_setup function. */
5068
5069 asection *
5070 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5071 {
5072 struct ppc_elf_link_hash_table *htab;
5073
5074 htab = ppc_elf_hash_table (info);
5075 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5076 FALSE, FALSE, TRUE);
5077 if (htab->plt_type != PLT_NEW)
5078 htab->params->no_tls_get_addr_opt = TRUE;
5079
5080 if (!htab->params->no_tls_get_addr_opt)
5081 {
5082 struct elf_link_hash_entry *opt, *tga;
5083 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5084 FALSE, FALSE, TRUE);
5085 if (opt != NULL
5086 && (opt->root.type == bfd_link_hash_defined
5087 || opt->root.type == bfd_link_hash_defweak))
5088 {
5089 /* If glibc supports an optimized __tls_get_addr call stub,
5090 signalled by the presence of __tls_get_addr_opt, and we'll
5091 be calling __tls_get_addr via a plt call stub, then
5092 make __tls_get_addr point to __tls_get_addr_opt. */
5093 tga = htab->tls_get_addr;
5094 if (htab->elf.dynamic_sections_created
5095 && tga != NULL
5096 && (tga->type == STT_FUNC
5097 || tga->needs_plt)
5098 && !(SYMBOL_CALLS_LOCAL (info, tga)
5099 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5100 {
5101 struct plt_entry *ent;
5102 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5103 if (ent->plt.refcount > 0)
5104 break;
5105 if (ent != NULL)
5106 {
5107 tga->root.type = bfd_link_hash_indirect;
5108 tga->root.u.i.link = &opt->root;
5109 ppc_elf_copy_indirect_symbol (info, opt, tga);
5110 opt->mark = 1;
5111 if (opt->dynindx != -1)
5112 {
5113 /* Use __tls_get_addr_opt in dynamic relocations. */
5114 opt->dynindx = -1;
5115 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5116 opt->dynstr_index);
5117 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5118 return FALSE;
5119 }
5120 htab->tls_get_addr = opt;
5121 }
5122 }
5123 }
5124 else
5125 htab->params->no_tls_get_addr_opt = TRUE;
5126 }
5127 if (htab->plt_type == PLT_NEW
5128 && htab->elf.splt != NULL
5129 && htab->elf.splt->output_section != NULL)
5130 {
5131 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5132 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5133 }
5134
5135 return _bfd_elf_tls_setup (obfd, info);
5136 }
5137
5138 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5139 HASH. */
5140
5141 static bfd_boolean
5142 branch_reloc_hash_match (const bfd *ibfd,
5143 const Elf_Internal_Rela *rel,
5144 const struct elf_link_hash_entry *hash)
5145 {
5146 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5147 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5148 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5149
5150 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5151 {
5152 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5153 struct elf_link_hash_entry *h;
5154
5155 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5156 while (h->root.type == bfd_link_hash_indirect
5157 || h->root.type == bfd_link_hash_warning)
5158 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5159 if (h == hash)
5160 return TRUE;
5161 }
5162 return FALSE;
5163 }
5164
5165 /* Run through all the TLS relocs looking for optimization
5166 opportunities. */
5167
5168 bfd_boolean
5169 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5170 struct bfd_link_info *info)
5171 {
5172 bfd *ibfd;
5173 asection *sec;
5174 struct ppc_elf_link_hash_table *htab;
5175 int pass;
5176
5177 if (!bfd_link_executable (info))
5178 return TRUE;
5179
5180 htab = ppc_elf_hash_table (info);
5181 if (htab == NULL)
5182 return FALSE;
5183
5184 /* Make two passes through the relocs. First time check that tls
5185 relocs involved in setting up a tls_get_addr call are indeed
5186 followed by such a call. If they are not, don't do any tls
5187 optimization. On the second pass twiddle tls_mask flags to
5188 notify relocate_section that optimization can be done, and
5189 adjust got and plt refcounts. */
5190 for (pass = 0; pass < 2; ++pass)
5191 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5192 {
5193 Elf_Internal_Sym *locsyms = NULL;
5194 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5195 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5196
5197 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5198 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5199 {
5200 Elf_Internal_Rela *relstart, *rel, *relend;
5201 int expecting_tls_get_addr = 0;
5202
5203 /* Read the relocations. */
5204 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5205 info->keep_memory);
5206 if (relstart == NULL)
5207 return FALSE;
5208
5209 relend = relstart + sec->reloc_count;
5210 for (rel = relstart; rel < relend; rel++)
5211 {
5212 enum elf_ppc_reloc_type r_type;
5213 unsigned long r_symndx;
5214 struct elf_link_hash_entry *h = NULL;
5215 char *tls_mask;
5216 char tls_set, tls_clear;
5217 bfd_boolean is_local;
5218 bfd_signed_vma *got_count;
5219
5220 r_symndx = ELF32_R_SYM (rel->r_info);
5221 if (r_symndx >= symtab_hdr->sh_info)
5222 {
5223 struct elf_link_hash_entry **sym_hashes;
5224
5225 sym_hashes = elf_sym_hashes (ibfd);
5226 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5227 while (h->root.type == bfd_link_hash_indirect
5228 || h->root.type == bfd_link_hash_warning)
5229 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5230 }
5231
5232 is_local = FALSE;
5233 if (h == NULL
5234 || !h->def_dynamic)
5235 is_local = TRUE;
5236
5237 r_type = ELF32_R_TYPE (rel->r_info);
5238 /* If this section has old-style __tls_get_addr calls
5239 without marker relocs, then check that each
5240 __tls_get_addr call reloc is preceded by a reloc
5241 that conceivably belongs to the __tls_get_addr arg
5242 setup insn. If we don't find matching arg setup
5243 relocs, don't do any tls optimization. */
5244 if (pass == 0
5245 && sec->has_tls_get_addr_call
5246 && h != NULL
5247 && h == htab->tls_get_addr
5248 && !expecting_tls_get_addr
5249 && is_branch_reloc (r_type))
5250 {
5251 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5252 "TLS optimization disabled\n",
5253 ibfd, sec, rel->r_offset);
5254 if (elf_section_data (sec)->relocs != relstart)
5255 free (relstart);
5256 return TRUE;
5257 }
5258
5259 expecting_tls_get_addr = 0;
5260 switch (r_type)
5261 {
5262 case R_PPC_GOT_TLSLD16:
5263 case R_PPC_GOT_TLSLD16_LO:
5264 expecting_tls_get_addr = 1;
5265 /* Fall through. */
5266
5267 case R_PPC_GOT_TLSLD16_HI:
5268 case R_PPC_GOT_TLSLD16_HA:
5269 /* These relocs should never be against a symbol
5270 defined in a shared lib. Leave them alone if
5271 that turns out to be the case. */
5272 if (!is_local)
5273 continue;
5274
5275 /* LD -> LE */
5276 tls_set = 0;
5277 tls_clear = TLS_LD;
5278 break;
5279
5280 case R_PPC_GOT_TLSGD16:
5281 case R_PPC_GOT_TLSGD16_LO:
5282 expecting_tls_get_addr = 1;
5283 /* Fall through. */
5284
5285 case R_PPC_GOT_TLSGD16_HI:
5286 case R_PPC_GOT_TLSGD16_HA:
5287 if (is_local)
5288 /* GD -> LE */
5289 tls_set = 0;
5290 else
5291 /* GD -> IE */
5292 tls_set = TLS_TLS | TLS_TPRELGD;
5293 tls_clear = TLS_GD;
5294 break;
5295
5296 case R_PPC_GOT_TPREL16:
5297 case R_PPC_GOT_TPREL16_LO:
5298 case R_PPC_GOT_TPREL16_HI:
5299 case R_PPC_GOT_TPREL16_HA:
5300 if (is_local)
5301 {
5302 /* IE -> LE */
5303 tls_set = 0;
5304 tls_clear = TLS_TPREL;
5305 break;
5306 }
5307 else
5308 continue;
5309
5310 case R_PPC_TLSGD:
5311 case R_PPC_TLSLD:
5312 expecting_tls_get_addr = 2;
5313 tls_set = 0;
5314 tls_clear = 0;
5315 break;
5316
5317 default:
5318 continue;
5319 }
5320
5321 if (pass == 0)
5322 {
5323 if (!expecting_tls_get_addr
5324 || (expecting_tls_get_addr == 1
5325 && !sec->has_tls_get_addr_call))
5326 continue;
5327
5328 if (rel + 1 < relend
5329 && branch_reloc_hash_match (ibfd, rel + 1,
5330 htab->tls_get_addr))
5331 continue;
5332
5333 /* Uh oh, we didn't find the expected call. We
5334 could just mark this symbol to exclude it
5335 from tls optimization but it's safer to skip
5336 the entire optimization. */
5337 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5338 "TLS optimization disabled\n"),
5339 ibfd, sec, rel->r_offset);
5340 if (elf_section_data (sec)->relocs != relstart)
5341 free (relstart);
5342 return TRUE;
5343 }
5344
5345 if (expecting_tls_get_addr)
5346 {
5347 struct plt_entry *ent;
5348 bfd_vma addend = 0;
5349
5350 if (bfd_link_pic (info)
5351 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5352 addend = rel[1].r_addend;
5353 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5354 got2, addend);
5355 if (ent != NULL && ent->plt.refcount > 0)
5356 ent->plt.refcount -= 1;
5357
5358 if (expecting_tls_get_addr == 2)
5359 continue;
5360 }
5361
5362 if (h != NULL)
5363 {
5364 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5365 got_count = &h->got.refcount;
5366 }
5367 else
5368 {
5369 bfd_signed_vma *lgot_refs;
5370 struct plt_entry **local_plt;
5371 char *lgot_masks;
5372
5373 if (locsyms == NULL)
5374 {
5375 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5376 if (locsyms == NULL)
5377 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5378 symtab_hdr->sh_info,
5379 0, NULL, NULL, NULL);
5380 if (locsyms == NULL)
5381 {
5382 if (elf_section_data (sec)->relocs != relstart)
5383 free (relstart);
5384 return FALSE;
5385 }
5386 }
5387 lgot_refs = elf_local_got_refcounts (ibfd);
5388 if (lgot_refs == NULL)
5389 abort ();
5390 local_plt = (struct plt_entry **)
5391 (lgot_refs + symtab_hdr->sh_info);
5392 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5393 tls_mask = &lgot_masks[r_symndx];
5394 got_count = &lgot_refs[r_symndx];
5395 }
5396
5397 if (tls_set == 0)
5398 {
5399 /* We managed to get rid of a got entry. */
5400 if (*got_count > 0)
5401 *got_count -= 1;
5402 }
5403
5404 *tls_mask |= tls_set;
5405 *tls_mask &= ~tls_clear;
5406 }
5407
5408 if (elf_section_data (sec)->relocs != relstart)
5409 free (relstart);
5410 }
5411
5412 if (locsyms != NULL
5413 && (symtab_hdr->contents != (unsigned char *) locsyms))
5414 {
5415 if (!info->keep_memory)
5416 free (locsyms);
5417 else
5418 symtab_hdr->contents = (unsigned char *) locsyms;
5419 }
5420 }
5421 htab->do_tls_opt = 1;
5422 return TRUE;
5423 }
5424 \f
5425 /* Find dynamic relocs for H that apply to read-only sections. */
5426
5427 static asection *
5428 readonly_dynrelocs (struct elf_link_hash_entry *h)
5429 {
5430 struct elf_dyn_relocs *p;
5431
5432 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5433 {
5434 asection *s = p->sec->output_section;
5435
5436 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5437 return p->sec;
5438 }
5439 return NULL;
5440 }
5441
5442 /* Return true if we have dynamic relocs against H or any of its weak
5443 aliases, that apply to read-only sections. Cannot be used after
5444 size_dynamic_sections. */
5445
5446 static bfd_boolean
5447 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
5448 {
5449 struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h);
5450 do
5451 {
5452 if (readonly_dynrelocs (&eh->elf))
5453 return TRUE;
5454 eh = ppc_elf_hash_entry (eh->elf.u.alias);
5455 } while (eh != NULL && &eh->elf != h);
5456
5457 return FALSE;
5458 }
5459
5460 /* Return whether H has pc-relative dynamic relocs. */
5461
5462 static bfd_boolean
5463 pc_dynrelocs (struct elf_link_hash_entry *h)
5464 {
5465 struct elf_dyn_relocs *p;
5466
5467 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5468 if (p->pc_count != 0)
5469 return TRUE;
5470 return FALSE;
5471 }
5472
5473 /* Adjust a symbol defined by a dynamic object and referenced by a
5474 regular object. The current definition is in some section of the
5475 dynamic object, but we're not including those sections. We have to
5476 change the definition to something the rest of the link can
5477 understand. */
5478
5479 static bfd_boolean
5480 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5481 struct elf_link_hash_entry *h)
5482 {
5483 struct ppc_elf_link_hash_table *htab;
5484 asection *s;
5485
5486 #ifdef DEBUG
5487 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5488 h->root.root.string);
5489 #endif
5490
5491 /* Make sure we know what is going on here. */
5492 htab = ppc_elf_hash_table (info);
5493 BFD_ASSERT (htab->elf.dynobj != NULL
5494 && (h->needs_plt
5495 || h->type == STT_GNU_IFUNC
5496 || h->is_weakalias
5497 || (h->def_dynamic
5498 && h->ref_regular
5499 && !h->def_regular)));
5500
5501 /* Deal with function syms. */
5502 if (h->type == STT_FUNC
5503 || h->type == STT_GNU_IFUNC
5504 || h->needs_plt)
5505 {
5506 bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, h)
5507 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
5508 /* Discard dyn_relocs when non-pic if we've decided that a
5509 function symbol is local. */
5510 if (!bfd_link_pic (info) && local)
5511 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5512
5513 /* Clear procedure linkage table information for any symbol that
5514 won't need a .plt entry. */
5515 struct plt_entry *ent;
5516 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5517 if (ent->plt.refcount > 0)
5518 break;
5519 if (ent == NULL
5520 || (h->type != STT_GNU_IFUNC && local))
5521 {
5522 /* A PLT entry is not required/allowed when:
5523
5524 1. We are not using ld.so; because then the PLT entry
5525 can't be set up, so we can't use one. In this case,
5526 ppc_elf_adjust_dynamic_symbol won't even be called.
5527
5528 2. GC has rendered the entry unused.
5529
5530 3. We know for certain that a call to this symbol
5531 will go to this object, or will remain undefined. */
5532 h->plt.plist = NULL;
5533 h->needs_plt = 0;
5534 h->pointer_equality_needed = 0;
5535 }
5536 else
5537 {
5538 /* Taking a function's address in a read/write section
5539 doesn't require us to define the function symbol in the
5540 executable on a plt call stub. A dynamic reloc can
5541 be used instead, giving better runtime performance.
5542 (Calls via that function pointer don't need to bounce
5543 through the plt call stub.) Similarly, use a dynamic
5544 reloc for a weak reference when possible, allowing the
5545 resolution of the symbol to be set at load time rather
5546 than link time. */
5547 if ((h->pointer_equality_needed
5548 || (h->non_got_ref
5549 && !h->ref_regular_nonweak
5550 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5551 && !htab->is_vxworks
5552 && !ppc_elf_hash_entry (h)->has_sda_refs
5553 && !readonly_dynrelocs (h))
5554 {
5555 h->pointer_equality_needed = 0;
5556 /* If we haven't seen a branch reloc then we don't need
5557 a plt entry. */
5558 if (!h->needs_plt)
5559 h->plt.plist = NULL;
5560 }
5561 else if (!bfd_link_pic (info))
5562 /* We are going to be defining the function symbol on the
5563 plt stub, so no dyn_relocs needed when non-pic. */
5564 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5565 }
5566 h->protected_def = 0;
5567 /* Function symbols can't have copy relocs. */
5568 return TRUE;
5569 }
5570 else
5571 h->plt.plist = NULL;
5572
5573 /* If this is a weak symbol, and there is a real definition, the
5574 processor independent code will have arranged for us to see the
5575 real definition first, and we can just use the same value. */
5576 if (h->is_weakalias)
5577 {
5578 struct elf_link_hash_entry *def = weakdef (h);
5579 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5580 h->root.u.def.section = def->root.u.def.section;
5581 h->root.u.def.value = def->root.u.def.value;
5582 if (def->root.u.def.section == htab->elf.sdynbss
5583 || def->root.u.def.section == htab->elf.sdynrelro
5584 || def->root.u.def.section == htab->dynsbss)
5585 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5586 return TRUE;
5587 }
5588
5589 /* This is a reference to a symbol defined by a dynamic object which
5590 is not a function. */
5591
5592 /* If we are creating a shared library, we must presume that the
5593 only references to the symbol are via the global offset table.
5594 For such cases we need not do anything here; the relocations will
5595 be handled correctly by relocate_section. */
5596 if (bfd_link_pic (info))
5597 {
5598 h->protected_def = 0;
5599 return TRUE;
5600 }
5601
5602 /* If there are no references to this symbol that do not use the
5603 GOT, we don't need to generate a copy reloc. */
5604 if (!h->non_got_ref)
5605 {
5606 h->protected_def = 0;
5607 return TRUE;
5608 }
5609
5610 /* Protected variables do not work with .dynbss. The copy in
5611 .dynbss won't be used by the shared library with the protected
5612 definition for the variable. Editing to PIC, or text relocations
5613 are preferable to an incorrect program. */
5614 if (h->protected_def)
5615 {
5616 if (ELIMINATE_COPY_RELOCS
5617 && ppc_elf_hash_entry (h)->has_addr16_ha
5618 && ppc_elf_hash_entry (h)->has_addr16_lo
5619 && htab->params->pic_fixup == 0
5620 && info->disable_target_specific_optimizations <= 1)
5621 htab->params->pic_fixup = 1;
5622 return TRUE;
5623 }
5624
5625 /* If -z nocopyreloc was given, we won't generate them either. */
5626 if (info->nocopyreloc)
5627 return TRUE;
5628
5629 /* If we don't find any dynamic relocs in read-only sections, then
5630 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5631 We can't do this if there are any small data relocations. This
5632 doesn't work on VxWorks, where we can not have dynamic
5633 relocations (other than copy and jump slot relocations) in an
5634 executable. */
5635 if (ELIMINATE_COPY_RELOCS
5636 && !ppc_elf_hash_entry (h)->has_sda_refs
5637 && !htab->is_vxworks
5638 && !h->def_regular
5639 && !alias_readonly_dynrelocs (h))
5640 return TRUE;
5641
5642 /* We must allocate the symbol in our .dynbss section, which will
5643 become part of the .bss section of the executable. There will be
5644 an entry for this symbol in the .dynsym section. The dynamic
5645 object will contain position independent code, so all references
5646 from the dynamic object to this symbol will go through the global
5647 offset table. The dynamic linker will use the .dynsym entry to
5648 determine the address it must put in the global offset table, so
5649 both the dynamic object and the regular object will refer to the
5650 same memory location for the variable.
5651
5652 Of course, if the symbol is referenced using SDAREL relocs, we
5653 must instead allocate it in .sbss. */
5654 if (ppc_elf_hash_entry (h)->has_sda_refs)
5655 s = htab->dynsbss;
5656 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5657 s = htab->elf.sdynrelro;
5658 else
5659 s = htab->elf.sdynbss;
5660 BFD_ASSERT (s != NULL);
5661
5662 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5663 {
5664 asection *srel;
5665
5666 /* We must generate a R_PPC_COPY reloc to tell the dynamic
5667 linker to copy the initial value out of the dynamic object
5668 and into the runtime process image. */
5669 if (ppc_elf_hash_entry (h)->has_sda_refs)
5670 srel = htab->relsbss;
5671 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5672 srel = htab->elf.sreldynrelro;
5673 else
5674 srel = htab->elf.srelbss;
5675 BFD_ASSERT (srel != NULL);
5676 srel->size += sizeof (Elf32_External_Rela);
5677 h->needs_copy = 1;
5678 }
5679
5680 /* We no longer want dyn_relocs. */
5681 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5682 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5683 }
5684 \f
5685 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5686 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5687 specifying the addend on the plt relocation. For -fpic code, the sym
5688 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5689 xxxxxxxx.got2.plt_pic32.<callee>. */
5690
5691 static bfd_boolean
5692 add_stub_sym (struct plt_entry *ent,
5693 struct elf_link_hash_entry *h,
5694 struct bfd_link_info *info)
5695 {
5696 struct elf_link_hash_entry *sh;
5697 size_t len1, len2, len3;
5698 char *name;
5699 const char *stub;
5700 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5701
5702 if (bfd_link_pic (info))
5703 stub = ".plt_pic32.";
5704 else
5705 stub = ".plt_call32.";
5706
5707 len1 = strlen (h->root.root.string);
5708 len2 = strlen (stub);
5709 len3 = 0;
5710 if (ent->sec)
5711 len3 = strlen (ent->sec->name);
5712 name = bfd_malloc (len1 + len2 + len3 + 9);
5713 if (name == NULL)
5714 return FALSE;
5715 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5716 if (ent->sec)
5717 memcpy (name + 8, ent->sec->name, len3);
5718 memcpy (name + 8 + len3, stub, len2);
5719 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5720 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5721 if (sh == NULL)
5722 return FALSE;
5723 if (sh->root.type == bfd_link_hash_new)
5724 {
5725 sh->root.type = bfd_link_hash_defined;
5726 sh->root.u.def.section = htab->glink;
5727 sh->root.u.def.value = ent->glink_offset;
5728 sh->ref_regular = 1;
5729 sh->def_regular = 1;
5730 sh->ref_regular_nonweak = 1;
5731 sh->forced_local = 1;
5732 sh->non_elf = 0;
5733 sh->root.linker_def = 1;
5734 }
5735 return TRUE;
5736 }
5737
5738 /* Allocate NEED contiguous space in .got, and return the offset.
5739 Handles allocation of the got header when crossing 32k. */
5740
5741 static bfd_vma
5742 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5743 {
5744 bfd_vma where;
5745 unsigned int max_before_header;
5746
5747 if (htab->plt_type == PLT_VXWORKS)
5748 {
5749 where = htab->elf.sgot->size;
5750 htab->elf.sgot->size += need;
5751 }
5752 else
5753 {
5754 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5755 if (need <= htab->got_gap)
5756 {
5757 where = max_before_header - htab->got_gap;
5758 htab->got_gap -= need;
5759 }
5760 else
5761 {
5762 if (htab->elf.sgot->size + need > max_before_header
5763 && htab->elf.sgot->size <= max_before_header)
5764 {
5765 htab->got_gap = max_before_header - htab->elf.sgot->size;
5766 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5767 }
5768 where = htab->elf.sgot->size;
5769 htab->elf.sgot->size += need;
5770 }
5771 }
5772 return where;
5773 }
5774
5775 /* Calculate size of GOT entries for symbol given its TLS_MASK.
5776 TLS_LD is excluded because those go in a special GOT slot. */
5777
5778 static inline unsigned int
5779 got_entries_needed (int tls_mask)
5780 {
5781 unsigned int need;
5782 if ((tls_mask & TLS_TLS) == 0)
5783 need = 4;
5784 else
5785 {
5786 need = 0;
5787 if ((tls_mask & TLS_GD) != 0)
5788 need += 8;
5789 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5790 need += 4;
5791 if ((tls_mask & TLS_DTPREL) != 0)
5792 need += 4;
5793 }
5794 return need;
5795 }
5796
5797 /* Calculate size of relocs needed for symbol given its TLS_MASK and
5798 NEEDed GOT entries. KNOWN says a TPREL offset can be calculated at
5799 link time. */
5800
5801 static inline unsigned int
5802 got_relocs_needed (int tls_mask, unsigned int need, bfd_boolean known)
5803 {
5804 /* All the entries we allocated need relocs.
5805 Except IE in executable with a local symbol. We could also omit
5806 the DTPREL reloc on the second word of a GD entry under the same
5807 condition as that for IE, but ld.so needs to differentiate
5808 LD and GD entries. */
5809 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0 && known)
5810 need -= 4;
5811 return need * sizeof (Elf32_External_Rela) / 4;
5812 }
5813
5814 /* If H is undefined, make it dynamic if that makes sense. */
5815
5816 static bfd_boolean
5817 ensure_undef_dynamic (struct bfd_link_info *info,
5818 struct elf_link_hash_entry *h)
5819 {
5820 struct elf_link_hash_table *htab = elf_hash_table (info);
5821
5822 if (htab->dynamic_sections_created
5823 && ((info->dynamic_undefined_weak != 0
5824 && h->root.type == bfd_link_hash_undefweak)
5825 || h->root.type == bfd_link_hash_undefined)
5826 && h->dynindx == -1
5827 && !h->forced_local
5828 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5829 return bfd_elf_link_record_dynamic_symbol (info, h);
5830 return TRUE;
5831 }
5832
5833 /* Allocate space in associated reloc sections for dynamic relocs. */
5834
5835 static bfd_boolean
5836 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5837 {
5838 struct bfd_link_info *info = inf;
5839 struct ppc_elf_link_hash_entry *eh;
5840 struct ppc_elf_link_hash_table *htab;
5841 struct elf_dyn_relocs *p;
5842 bfd_boolean dyn;
5843
5844 if (h->root.type == bfd_link_hash_indirect)
5845 return TRUE;
5846
5847 htab = ppc_elf_hash_table (info);
5848 eh = (struct ppc_elf_link_hash_entry *) h;
5849 if (eh->elf.got.refcount > 0
5850 || (ELIMINATE_COPY_RELOCS
5851 && !eh->elf.def_regular
5852 && eh->elf.protected_def
5853 && eh->has_addr16_ha
5854 && eh->has_addr16_lo
5855 && htab->params->pic_fixup > 0))
5856 {
5857 unsigned int need;
5858
5859 /* Make sure this symbol is output as a dynamic symbol. */
5860 if (!ensure_undef_dynamic (info, &eh->elf))
5861 return FALSE;
5862
5863 need = 0;
5864 if ((eh->tls_mask & TLS_LD) != 0)
5865 {
5866 if (!eh->elf.def_dynamic)
5867 /* We'll just use htab->tlsld_got.offset. This should
5868 always be the case. It's a little odd if we have
5869 a local dynamic reloc against a non-local symbol. */
5870 htab->tlsld_got.refcount += 1;
5871 else
5872 need += 8;
5873 }
5874 need += got_entries_needed (eh->tls_mask);
5875 if (need == 0)
5876 eh->elf.got.offset = (bfd_vma) -1;
5877 else
5878 {
5879 eh->elf.got.offset = allocate_got (htab, need);
5880 if ((bfd_link_pic (info)
5881 || (htab->elf.dynamic_sections_created
5882 && eh->elf.dynindx != -1
5883 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
5884 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
5885 {
5886 asection *rsec;
5887 bfd_boolean tprel_known = (bfd_link_executable (info)
5888 && SYMBOL_REFERENCES_LOCAL (info,
5889 &eh->elf));
5890
5891 need = got_relocs_needed (eh->tls_mask, need, tprel_known);
5892 if ((eh->tls_mask & TLS_LD) != 0 && eh->elf.def_dynamic)
5893 need -= sizeof (Elf32_External_Rela);
5894 rsec = htab->elf.srelgot;
5895 if (eh->elf.type == STT_GNU_IFUNC)
5896 rsec = htab->elf.irelplt;
5897 rsec->size += need;
5898 }
5899 }
5900 }
5901 else
5902 eh->elf.got.offset = (bfd_vma) -1;
5903
5904 /* If no dynamic sections we can't have dynamic relocs, except for
5905 IFUNCs which are handled even in static executables. */
5906 if (!htab->elf.dynamic_sections_created
5907 && h->type != STT_GNU_IFUNC)
5908 eh->dyn_relocs = NULL;
5909
5910 /* Discard relocs on undefined symbols that must be local. */
5911 else if (h->root.type == bfd_link_hash_undefined
5912 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5913 eh->dyn_relocs = NULL;
5914
5915 /* Also discard relocs on undefined weak syms with non-default
5916 visibility, or when dynamic_undefined_weak says so. */
5917 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
5918 eh->dyn_relocs = NULL;
5919
5920 if (eh->dyn_relocs == NULL)
5921 ;
5922
5923 /* In the shared -Bsymbolic case, discard space allocated for
5924 dynamic pc-relative relocs against symbols which turn out to be
5925 defined in regular objects. For the normal shared case, discard
5926 space for relocs that have become local due to symbol visibility
5927 changes. */
5928 else if (bfd_link_pic (info))
5929 {
5930 /* Relocs that use pc_count are those that appear on a call insn,
5931 or certain REL relocs (see must_be_dyn_reloc) that can be
5932 generated via assembly. We want calls to protected symbols to
5933 resolve directly to the function rather than going via the plt.
5934 If people want function pointer comparisons to work as expected
5935 then they should avoid writing weird assembly. */
5936 if (SYMBOL_CALLS_LOCAL (info, h))
5937 {
5938 struct elf_dyn_relocs **pp;
5939
5940 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5941 {
5942 p->count -= p->pc_count;
5943 p->pc_count = 0;
5944 if (p->count == 0)
5945 *pp = p->next;
5946 else
5947 pp = &p->next;
5948 }
5949 }
5950
5951 if (htab->is_vxworks)
5952 {
5953 struct elf_dyn_relocs **pp;
5954
5955 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5956 {
5957 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5958 *pp = p->next;
5959 else
5960 pp = &p->next;
5961 }
5962 }
5963
5964 if (eh->dyn_relocs != NULL)
5965 {
5966 /* Make sure this symbol is output as a dynamic symbol. */
5967 if (!ensure_undef_dynamic (info, h))
5968 return FALSE;
5969 }
5970 }
5971 else if (ELIMINATE_COPY_RELOCS)
5972 {
5973 /* For the non-pic case, discard space for relocs against
5974 symbols which turn out to need copy relocs or are not
5975 dynamic. */
5976 if (h->dynamic_adjusted
5977 && !h->def_regular
5978 && !ELF_COMMON_DEF_P (h)
5979 && !(h->protected_def
5980 && eh->has_addr16_ha
5981 && eh->has_addr16_lo
5982 && htab->params->pic_fixup > 0))
5983 {
5984 /* Make sure this symbol is output as a dynamic symbol. */
5985 if (!ensure_undef_dynamic (info, h))
5986 return FALSE;
5987
5988 if (h->dynindx == -1)
5989 eh->dyn_relocs = NULL;
5990 }
5991 else
5992 eh->dyn_relocs = NULL;
5993 }
5994
5995 /* Allocate space. */
5996 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5997 {
5998 asection *sreloc = elf_section_data (p->sec)->sreloc;
5999 if (eh->elf.type == STT_GNU_IFUNC)
6000 sreloc = htab->elf.irelplt;
6001 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6002 }
6003
6004 /* Handle PLT relocs. Done last, after dynindx has settled. */
6005 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6006 if (dyn || h->type == STT_GNU_IFUNC)
6007 {
6008 struct plt_entry *ent;
6009 bfd_boolean doneone = FALSE;
6010 bfd_vma plt_offset = 0, glink_offset = 0;
6011
6012 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6013 if (ent->plt.refcount > 0)
6014 {
6015 asection *s = htab->elf.splt;
6016
6017 if (!dyn)
6018 s = htab->elf.iplt;
6019
6020 if (htab->plt_type == PLT_NEW || !dyn)
6021 {
6022 if (!doneone)
6023 {
6024 plt_offset = s->size;
6025 s->size += 4;
6026 }
6027 ent->plt.offset = plt_offset;
6028
6029 s = htab->glink;
6030 if (!doneone || bfd_link_pic (info))
6031 {
6032 glink_offset = s->size;
6033 s->size += GLINK_ENTRY_SIZE (htab, h);
6034 }
6035 if (!doneone
6036 && !bfd_link_pic (info)
6037 && h->def_dynamic
6038 && !h->def_regular)
6039 {
6040 h->root.u.def.section = s;
6041 h->root.u.def.value = glink_offset;
6042 }
6043 ent->glink_offset = glink_offset;
6044
6045 if (htab->params->emit_stub_syms
6046 && !add_stub_sym (ent, h, info))
6047 return FALSE;
6048 }
6049 else
6050 {
6051 if (!doneone)
6052 {
6053 /* If this is the first .plt entry, make room
6054 for the special first entry. */
6055 if (s->size == 0)
6056 s->size += htab->plt_initial_entry_size;
6057
6058 /* The PowerPC PLT is actually composed of two
6059 parts, the first part is 2 words (for a load
6060 and a jump), and then there is a remaining
6061 word available at the end. */
6062 plt_offset = (htab->plt_initial_entry_size
6063 + (htab->plt_slot_size
6064 * ((s->size
6065 - htab->plt_initial_entry_size)
6066 / htab->plt_entry_size)));
6067
6068 /* If this symbol is not defined in a regular
6069 file, and we are not generating a shared
6070 library, then set the symbol to this location
6071 in the .plt. This is to avoid text
6072 relocations, and is required to make
6073 function pointers compare as equal between
6074 the normal executable and the shared library. */
6075 if (! bfd_link_pic (info)
6076 && h->def_dynamic
6077 && !h->def_regular)
6078 {
6079 h->root.u.def.section = s;
6080 h->root.u.def.value = plt_offset;
6081 }
6082
6083 /* Make room for this entry. */
6084 s->size += htab->plt_entry_size;
6085 /* After the 8192nd entry, room for two entries
6086 is allocated. */
6087 if (htab->plt_type == PLT_OLD
6088 && (s->size - htab->plt_initial_entry_size)
6089 / htab->plt_entry_size
6090 > PLT_NUM_SINGLE_ENTRIES)
6091 s->size += htab->plt_entry_size;
6092 }
6093 ent->plt.offset = plt_offset;
6094 }
6095
6096 /* We also need to make an entry in the .rela.plt section. */
6097 if (!doneone)
6098 {
6099 if (!dyn)
6100 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6101 else
6102 {
6103 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6104
6105 if (htab->plt_type == PLT_VXWORKS)
6106 {
6107 /* Allocate space for the unloaded relocations. */
6108 if (!bfd_link_pic (info)
6109 && htab->elf.dynamic_sections_created)
6110 {
6111 if (ent->plt.offset
6112 == (bfd_vma) htab->plt_initial_entry_size)
6113 {
6114 htab->srelplt2->size
6115 += (sizeof (Elf32_External_Rela)
6116 * VXWORKS_PLTRESOLVE_RELOCS);
6117 }
6118
6119 htab->srelplt2->size
6120 += (sizeof (Elf32_External_Rela)
6121 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6122 }
6123
6124 /* Every PLT entry has an associated GOT entry in
6125 .got.plt. */
6126 htab->elf.sgotplt->size += 4;
6127 }
6128 }
6129 doneone = TRUE;
6130 }
6131 }
6132 else
6133 ent->plt.offset = (bfd_vma) -1;
6134
6135 if (!doneone)
6136 {
6137 h->plt.plist = NULL;
6138 h->needs_plt = 0;
6139 }
6140 }
6141 else
6142 {
6143 h->plt.plist = NULL;
6144 h->needs_plt = 0;
6145 }
6146
6147 return TRUE;
6148 }
6149
6150 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6151 read-only sections. */
6152
6153 static bfd_boolean
6154 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6155 {
6156 asection *sec;
6157
6158 if (h->root.type == bfd_link_hash_indirect)
6159 return TRUE;
6160
6161 sec = readonly_dynrelocs (h);
6162 if (sec != NULL)
6163 {
6164 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
6165
6166 info->flags |= DF_TEXTREL;
6167 info->callbacks->minfo
6168 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
6169 sec->owner, h->root.root.string, sec);
6170
6171 /* Not an error, just cut short the traversal. */
6172 return FALSE;
6173 }
6174 return TRUE;
6175 }
6176
6177 static const unsigned char glink_eh_frame_cie[] =
6178 {
6179 0, 0, 0, 16, /* length. */
6180 0, 0, 0, 0, /* id. */
6181 1, /* CIE version. */
6182 'z', 'R', 0, /* Augmentation string. */
6183 4, /* Code alignment. */
6184 0x7c, /* Data alignment. */
6185 65, /* RA reg. */
6186 1, /* Augmentation size. */
6187 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6188 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6189 };
6190
6191 /* Set the sizes of the dynamic sections. */
6192
6193 static bfd_boolean
6194 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6195 struct bfd_link_info *info)
6196 {
6197 struct ppc_elf_link_hash_table *htab;
6198 asection *s;
6199 bfd_boolean relocs;
6200 bfd *ibfd;
6201
6202 #ifdef DEBUG
6203 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6204 #endif
6205
6206 htab = ppc_elf_hash_table (info);
6207 BFD_ASSERT (htab->elf.dynobj != NULL);
6208
6209 if (elf_hash_table (info)->dynamic_sections_created)
6210 {
6211 /* Set the contents of the .interp section to the interpreter. */
6212 if (bfd_link_executable (info) && !info->nointerp)
6213 {
6214 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6215 BFD_ASSERT (s != NULL);
6216 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6217 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6218 }
6219 }
6220
6221 if (htab->plt_type == PLT_OLD)
6222 htab->got_header_size = 16;
6223 else if (htab->plt_type == PLT_NEW)
6224 htab->got_header_size = 12;
6225
6226 /* Set up .got offsets for local syms, and space for local dynamic
6227 relocs. */
6228 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6229 {
6230 bfd_signed_vma *local_got;
6231 bfd_signed_vma *end_local_got;
6232 struct plt_entry **local_plt;
6233 struct plt_entry **end_local_plt;
6234 char *lgot_masks;
6235 bfd_size_type locsymcount;
6236 Elf_Internal_Shdr *symtab_hdr;
6237
6238 if (!is_ppc_elf (ibfd))
6239 continue;
6240
6241 for (s = ibfd->sections; s != NULL; s = s->next)
6242 {
6243 struct ppc_dyn_relocs *p;
6244
6245 for (p = ((struct ppc_dyn_relocs *)
6246 elf_section_data (s)->local_dynrel);
6247 p != NULL;
6248 p = p->next)
6249 {
6250 if (!bfd_is_abs_section (p->sec)
6251 && bfd_is_abs_section (p->sec->output_section))
6252 {
6253 /* Input section has been discarded, either because
6254 it is a copy of a linkonce section or due to
6255 linker script /DISCARD/, so we'll be discarding
6256 the relocs too. */
6257 }
6258 else if (htab->is_vxworks
6259 && strcmp (p->sec->output_section->name,
6260 ".tls_vars") == 0)
6261 {
6262 /* Relocations in vxworks .tls_vars sections are
6263 handled specially by the loader. */
6264 }
6265 else if (p->count != 0)
6266 {
6267 asection *sreloc = elf_section_data (p->sec)->sreloc;
6268 if (p->ifunc)
6269 sreloc = htab->elf.irelplt;
6270 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6271 if ((p->sec->output_section->flags
6272 & (SEC_READONLY | SEC_ALLOC))
6273 == (SEC_READONLY | SEC_ALLOC))
6274 {
6275 info->flags |= DF_TEXTREL;
6276 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
6277 p->sec->owner, p->sec);
6278 }
6279 }
6280 }
6281 }
6282
6283 local_got = elf_local_got_refcounts (ibfd);
6284 if (!local_got)
6285 continue;
6286
6287 symtab_hdr = &elf_symtab_hdr (ibfd);
6288 locsymcount = symtab_hdr->sh_info;
6289 end_local_got = local_got + locsymcount;
6290 local_plt = (struct plt_entry **) end_local_got;
6291 end_local_plt = local_plt + locsymcount;
6292 lgot_masks = (char *) end_local_plt;
6293
6294 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6295 if (*local_got > 0)
6296 {
6297 unsigned int need;
6298 if ((*lgot_masks & TLS_LD) != 0)
6299 htab->tlsld_got.refcount += 1;
6300 need = got_entries_needed (*lgot_masks);
6301 if (need == 0)
6302 *local_got = (bfd_vma) -1;
6303 else
6304 {
6305 *local_got = allocate_got (htab, need);
6306 if (bfd_link_pic (info))
6307 {
6308 asection *srel;
6309 bfd_boolean tprel_known = bfd_link_executable (info);
6310
6311 need = got_relocs_needed (*lgot_masks, need, tprel_known);
6312 srel = htab->elf.srelgot;
6313 if ((*lgot_masks & PLT_IFUNC) != 0)
6314 srel = htab->elf.irelplt;
6315 srel->size += need;
6316 }
6317 }
6318 }
6319 else
6320 *local_got = (bfd_vma) -1;
6321
6322 if (htab->is_vxworks)
6323 continue;
6324
6325 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6326 for (; local_plt < end_local_plt; ++local_plt)
6327 {
6328 struct plt_entry *ent;
6329 bfd_boolean doneone = FALSE;
6330 bfd_vma plt_offset = 0, glink_offset = 0;
6331
6332 for (ent = *local_plt; ent != NULL; ent = ent->next)
6333 if (ent->plt.refcount > 0)
6334 {
6335 s = htab->elf.iplt;
6336
6337 if (!doneone)
6338 {
6339 plt_offset = s->size;
6340 s->size += 4;
6341 }
6342 ent->plt.offset = plt_offset;
6343
6344 s = htab->glink;
6345 if (!doneone || bfd_link_pic (info))
6346 {
6347 glink_offset = s->size;
6348 s->size += GLINK_ENTRY_SIZE (htab, NULL);
6349 }
6350 ent->glink_offset = glink_offset;
6351
6352 if (!doneone)
6353 {
6354 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6355 doneone = TRUE;
6356 }
6357 }
6358 else
6359 ent->plt.offset = (bfd_vma) -1;
6360 }
6361 }
6362
6363 /* Allocate space for global sym dynamic relocs. */
6364 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6365
6366 if (htab->tlsld_got.refcount > 0)
6367 {
6368 htab->tlsld_got.offset = allocate_got (htab, 8);
6369 if (bfd_link_pic (info))
6370 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6371 }
6372 else
6373 htab->tlsld_got.offset = (bfd_vma) -1;
6374
6375 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6376 {
6377 unsigned int g_o_t = 32768;
6378
6379 /* If we haven't allocated the header, do so now. When we get here,
6380 for old plt/got the got size will be 0 to 32764 (not allocated),
6381 or 32780 to 65536 (header allocated). For new plt/got, the
6382 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6383 if (htab->elf.sgot->size <= 32768)
6384 {
6385 g_o_t = htab->elf.sgot->size;
6386 if (htab->plt_type == PLT_OLD)
6387 g_o_t += 4;
6388 htab->elf.sgot->size += htab->got_header_size;
6389 }
6390
6391 htab->elf.hgot->root.u.def.value = g_o_t;
6392 }
6393 if (bfd_link_pic (info))
6394 {
6395 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6396
6397 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6398 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6399 }
6400 if (info->emitrelocations)
6401 {
6402 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6403
6404 if (sda != NULL && sda->ref_regular)
6405 sda->root.u.def.section->flags |= SEC_KEEP;
6406 sda = htab->sdata[1].sym;
6407 if (sda != NULL && sda->ref_regular)
6408 sda->root.u.def.section->flags |= SEC_KEEP;
6409 }
6410
6411 if (htab->glink != NULL
6412 && htab->glink->size != 0
6413 && htab->elf.dynamic_sections_created)
6414 {
6415 htab->glink_pltresolve = htab->glink->size;
6416 /* Space for the branch table. */
6417 htab->glink->size
6418 += htab->elf.srelplt->size / (sizeof (Elf32_External_Rela) / 4) - 4;
6419 /* Pad out to align the start of PLTresolve. */
6420 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6421 ? 63 : 15);
6422 htab->glink->size += GLINK_PLTRESOLVE;
6423
6424 if (htab->params->emit_stub_syms)
6425 {
6426 struct elf_link_hash_entry *sh;
6427 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6428 TRUE, FALSE, FALSE);
6429 if (sh == NULL)
6430 return FALSE;
6431 if (sh->root.type == bfd_link_hash_new)
6432 {
6433 sh->root.type = bfd_link_hash_defined;
6434 sh->root.u.def.section = htab->glink;
6435 sh->root.u.def.value = htab->glink_pltresolve;
6436 sh->ref_regular = 1;
6437 sh->def_regular = 1;
6438 sh->ref_regular_nonweak = 1;
6439 sh->forced_local = 1;
6440 sh->non_elf = 0;
6441 sh->root.linker_def = 1;
6442 }
6443 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6444 TRUE, FALSE, FALSE);
6445 if (sh == NULL)
6446 return FALSE;
6447 if (sh->root.type == bfd_link_hash_new)
6448 {
6449 sh->root.type = bfd_link_hash_defined;
6450 sh->root.u.def.section = htab->glink;
6451 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6452 sh->ref_regular = 1;
6453 sh->def_regular = 1;
6454 sh->ref_regular_nonweak = 1;
6455 sh->forced_local = 1;
6456 sh->non_elf = 0;
6457 sh->root.linker_def = 1;
6458 }
6459 }
6460 }
6461
6462 if (htab->glink != NULL
6463 && htab->glink->size != 0
6464 && htab->glink_eh_frame != NULL
6465 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6466 && _bfd_elf_eh_frame_present (info))
6467 {
6468 s = htab->glink_eh_frame;
6469 s->size = sizeof (glink_eh_frame_cie) + 20;
6470 if (bfd_link_pic (info))
6471 {
6472 s->size += 4;
6473 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6474 s->size += 4;
6475 }
6476 }
6477
6478 /* We've now determined the sizes of the various dynamic sections.
6479 Allocate memory for them. */
6480 relocs = FALSE;
6481 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6482 {
6483 bfd_boolean strip_section = TRUE;
6484
6485 if ((s->flags & SEC_LINKER_CREATED) == 0)
6486 continue;
6487
6488 if (s == htab->elf.splt
6489 || s == htab->elf.sgot)
6490 {
6491 /* We'd like to strip these sections if they aren't needed, but if
6492 we've exported dynamic symbols from them we must leave them.
6493 It's too late to tell BFD to get rid of the symbols. */
6494 if (htab->elf.hplt != NULL)
6495 strip_section = FALSE;
6496 /* Strip this section if we don't need it; see the
6497 comment below. */
6498 }
6499 else if (s == htab->elf.iplt
6500 || s == htab->glink
6501 || s == htab->glink_eh_frame
6502 || s == htab->elf.sgotplt
6503 || s == htab->sbss
6504 || s == htab->elf.sdynbss
6505 || s == htab->elf.sdynrelro
6506 || s == htab->dynsbss)
6507 {
6508 /* Strip these too. */
6509 }
6510 else if (s == htab->sdata[0].section
6511 || s == htab->sdata[1].section)
6512 {
6513 strip_section = (s->flags & SEC_KEEP) == 0;
6514 }
6515 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6516 ".rela"))
6517 {
6518 if (s->size != 0)
6519 {
6520 /* Remember whether there are any relocation sections. */
6521 relocs = TRUE;
6522
6523 /* We use the reloc_count field as a counter if we need
6524 to copy relocs into the output file. */
6525 s->reloc_count = 0;
6526 }
6527 }
6528 else
6529 {
6530 /* It's not one of our sections, so don't allocate space. */
6531 continue;
6532 }
6533
6534 if (s->size == 0 && strip_section)
6535 {
6536 /* If we don't need this section, strip it from the
6537 output file. This is mostly to handle .rela.bss and
6538 .rela.plt. We must create both sections in
6539 create_dynamic_sections, because they must be created
6540 before the linker maps input sections to output
6541 sections. The linker does that before
6542 adjust_dynamic_symbol is called, and it is that
6543 function which decides whether anything needs to go
6544 into these sections. */
6545 s->flags |= SEC_EXCLUDE;
6546 continue;
6547 }
6548
6549 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6550 continue;
6551
6552 /* Allocate memory for the section contents. */
6553 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6554 if (s->contents == NULL)
6555 return FALSE;
6556 }
6557
6558 if (htab->elf.dynamic_sections_created)
6559 {
6560 /* Add some entries to the .dynamic section. We fill in the
6561 values later, in ppc_elf_finish_dynamic_sections, but we
6562 must add the entries now so that we get the correct size for
6563 the .dynamic section. The DT_DEBUG entry is filled in by the
6564 dynamic linker and used by the debugger. */
6565 #define add_dynamic_entry(TAG, VAL) \
6566 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6567
6568 if (bfd_link_executable (info))
6569 {
6570 if (!add_dynamic_entry (DT_DEBUG, 0))
6571 return FALSE;
6572 }
6573
6574 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6575 {
6576 if (!add_dynamic_entry (DT_PLTGOT, 0)
6577 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6578 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6579 || !add_dynamic_entry (DT_JMPREL, 0))
6580 return FALSE;
6581 }
6582
6583 if (htab->plt_type == PLT_NEW
6584 && htab->glink != NULL
6585 && htab->glink->size != 0)
6586 {
6587 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6588 return FALSE;
6589 if (!htab->params->no_tls_get_addr_opt
6590 && htab->tls_get_addr != NULL
6591 && htab->tls_get_addr->plt.plist != NULL
6592 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6593 return FALSE;
6594 }
6595
6596 if (relocs)
6597 {
6598 if (!add_dynamic_entry (DT_RELA, 0)
6599 || !add_dynamic_entry (DT_RELASZ, 0)
6600 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6601 return FALSE;
6602 }
6603
6604 /* If any dynamic relocs apply to a read-only section, then we
6605 need a DT_TEXTREL entry. */
6606 if ((info->flags & DF_TEXTREL) == 0)
6607 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6608 info);
6609
6610 if ((info->flags & DF_TEXTREL) != 0)
6611 {
6612 if (!add_dynamic_entry (DT_TEXTREL, 0))
6613 return FALSE;
6614 }
6615 if (htab->is_vxworks
6616 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6617 return FALSE;
6618 }
6619 #undef add_dynamic_entry
6620
6621 if (htab->glink_eh_frame != NULL
6622 && htab->glink_eh_frame->contents != NULL)
6623 {
6624 unsigned char *p = htab->glink_eh_frame->contents;
6625 bfd_vma val;
6626
6627 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6628 /* CIE length (rewrite in case little-endian). */
6629 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6630 p += sizeof (glink_eh_frame_cie);
6631 /* FDE length. */
6632 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6633 bfd_put_32 (htab->elf.dynobj, val, p);
6634 p += 4;
6635 /* CIE pointer. */
6636 val = p - htab->glink_eh_frame->contents;
6637 bfd_put_32 (htab->elf.dynobj, val, p);
6638 p += 4;
6639 /* Offset to .glink. Set later. */
6640 p += 4;
6641 /* .glink size. */
6642 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6643 p += 4;
6644 /* Augmentation. */
6645 p += 1;
6646
6647 if (bfd_link_pic (info)
6648 && htab->elf.dynamic_sections_created)
6649 {
6650 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6651 if (adv < 64)
6652 *p++ = DW_CFA_advance_loc + adv;
6653 else if (adv < 256)
6654 {
6655 *p++ = DW_CFA_advance_loc1;
6656 *p++ = adv;
6657 }
6658 else if (adv < 65536)
6659 {
6660 *p++ = DW_CFA_advance_loc2;
6661 bfd_put_16 (htab->elf.dynobj, adv, p);
6662 p += 2;
6663 }
6664 else
6665 {
6666 *p++ = DW_CFA_advance_loc4;
6667 bfd_put_32 (htab->elf.dynobj, adv, p);
6668 p += 4;
6669 }
6670 *p++ = DW_CFA_register;
6671 *p++ = 65;
6672 p++;
6673 *p++ = DW_CFA_advance_loc + 4;
6674 *p++ = DW_CFA_restore_extended;
6675 *p++ = 65;
6676 }
6677 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6678 == htab->glink_eh_frame->size);
6679 }
6680
6681 return TRUE;
6682 }
6683
6684 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6685 if it looks like nothing is using them. */
6686
6687 static void
6688 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6689 {
6690 struct elf_link_hash_entry *sda = lsect->sym;
6691
6692 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6693 {
6694 asection *s;
6695
6696 s = bfd_get_section_by_name (output_bfd, lsect->name);
6697 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6698 {
6699 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6700 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6701 {
6702 sda->def_regular = 0;
6703 /* This is somewhat magic. See elf_link_output_extsym. */
6704 sda->ref_dynamic = 1;
6705 sda->forced_local = 0;
6706 }
6707 }
6708 }
6709 }
6710
6711 void
6712 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6713 {
6714 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6715
6716 if (htab != NULL)
6717 {
6718 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6719 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6720 }
6721 }
6722
6723
6724 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6725
6726 static bfd_boolean
6727 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6728 {
6729 if (h->plt.plist != NULL
6730 && !h->def_regular
6731 && (!h->pointer_equality_needed
6732 || !h->ref_regular_nonweak))
6733 return FALSE;
6734
6735 return _bfd_elf_hash_symbol (h);
6736 }
6737 \f
6738 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6739
6740 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6741 used for some functions that are allowed to break the ABI). */
6742 static const int shared_stub_entry[] =
6743 {
6744 0x7c0802a6, /* mflr 0 */
6745 0x429f0005, /* bcl 20, 31, .Lxxx */
6746 0x7d8802a6, /* mflr 12 */
6747 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6748 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6749 0x7c0803a6, /* mtlr 0 */
6750 0x7d8903a6, /* mtctr 12 */
6751 0x4e800420, /* bctr */
6752 };
6753
6754 static const int stub_entry[] =
6755 {
6756 0x3d800000, /* lis 12,xxx@ha */
6757 0x398c0000, /* addi 12,12,xxx@l */
6758 0x7d8903a6, /* mtctr 12 */
6759 0x4e800420, /* bctr */
6760 };
6761
6762 struct ppc_elf_relax_info
6763 {
6764 unsigned int workaround_size;
6765 unsigned int picfixup_size;
6766 };
6767
6768 /* This function implements long branch trampolines, and the ppc476
6769 icache bug workaround. Any section needing trampolines or patch
6770 space for the workaround has its size extended so that we can
6771 add trampolines at the end of the section. */
6772
6773 static bfd_boolean
6774 ppc_elf_relax_section (bfd *abfd,
6775 asection *isec,
6776 struct bfd_link_info *link_info,
6777 bfd_boolean *again)
6778 {
6779 struct one_branch_fixup
6780 {
6781 struct one_branch_fixup *next;
6782 asection *tsec;
6783 /* Final link, can use the symbol offset. For a
6784 relocatable link we use the symbol's index. */
6785 bfd_vma toff;
6786 bfd_vma trampoff;
6787 };
6788
6789 Elf_Internal_Shdr *symtab_hdr;
6790 bfd_byte *contents = NULL;
6791 Elf_Internal_Sym *isymbuf = NULL;
6792 Elf_Internal_Rela *internal_relocs = NULL;
6793 Elf_Internal_Rela *irel, *irelend = NULL;
6794 struct one_branch_fixup *branch_fixups = NULL;
6795 struct ppc_elf_relax_info *relax_info = NULL;
6796 unsigned changes = 0;
6797 bfd_boolean workaround_change;
6798 struct ppc_elf_link_hash_table *htab;
6799 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6800 asection *got2;
6801 bfd_boolean maybe_pasted;
6802
6803 *again = FALSE;
6804
6805 /* No need to do anything with non-alloc or non-code sections. */
6806 if ((isec->flags & SEC_ALLOC) == 0
6807 || (isec->flags & SEC_CODE) == 0
6808 || (isec->flags & SEC_LINKER_CREATED) != 0
6809 || isec->size < 4)
6810 return TRUE;
6811
6812 /* We cannot represent the required PIC relocs in the output, so don't
6813 do anything. The linker doesn't support mixing -shared and -r
6814 anyway. */
6815 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6816 return TRUE;
6817
6818 htab = ppc_elf_hash_table (link_info);
6819 if (htab == NULL)
6820 return TRUE;
6821
6822 isec->size = (isec->size + 3) & -4;
6823 if (isec->rawsize == 0)
6824 isec->rawsize = isec->size;
6825 trampbase = isec->size;
6826
6827 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6828 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6829 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6830
6831 if (htab->params->ppc476_workaround
6832 || htab->params->pic_fixup > 0)
6833 {
6834 if (elf_section_data (isec)->sec_info == NULL)
6835 {
6836 elf_section_data (isec)->sec_info
6837 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6838 if (elf_section_data (isec)->sec_info == NULL)
6839 return FALSE;
6840 }
6841 relax_info = elf_section_data (isec)->sec_info;
6842 trampbase -= relax_info->workaround_size;
6843 }
6844
6845 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6846 || strcmp (isec->output_section->name, ".fini") == 0);
6847 /* Space for a branch around any trampolines. */
6848 trampoff = trampbase;
6849 if (maybe_pasted && trampbase == isec->rawsize)
6850 trampoff += 4;
6851
6852 symtab_hdr = &elf_symtab_hdr (abfd);
6853 picfixup_size = 0;
6854 if (htab->params->branch_trampolines
6855 || htab->params->pic_fixup > 0)
6856 {
6857 /* Get a copy of the native relocations. */
6858 if (isec->reloc_count != 0)
6859 {
6860 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6861 link_info->keep_memory);
6862 if (internal_relocs == NULL)
6863 goto error_return;
6864 }
6865
6866 got2 = bfd_get_section_by_name (abfd, ".got2");
6867
6868 irelend = internal_relocs + isec->reloc_count;
6869 for (irel = internal_relocs; irel < irelend; irel++)
6870 {
6871 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6872 bfd_vma toff, roff;
6873 asection *tsec;
6874 struct one_branch_fixup *f;
6875 size_t insn_offset = 0;
6876 bfd_vma max_branch_offset = 0, val;
6877 bfd_byte *hit_addr;
6878 unsigned long t0;
6879 struct elf_link_hash_entry *h;
6880 struct plt_entry **plist;
6881 unsigned char sym_type;
6882
6883 switch (r_type)
6884 {
6885 case R_PPC_REL24:
6886 case R_PPC_LOCAL24PC:
6887 case R_PPC_PLTREL24:
6888 max_branch_offset = 1 << 25;
6889 break;
6890
6891 case R_PPC_REL14:
6892 case R_PPC_REL14_BRTAKEN:
6893 case R_PPC_REL14_BRNTAKEN:
6894 max_branch_offset = 1 << 15;
6895 break;
6896
6897 case R_PPC_ADDR16_HA:
6898 if (htab->params->pic_fixup > 0)
6899 break;
6900 continue;
6901
6902 default:
6903 continue;
6904 }
6905
6906 /* Get the value of the symbol referred to by the reloc. */
6907 h = NULL;
6908 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6909 {
6910 /* A local symbol. */
6911 Elf_Internal_Sym *isym;
6912
6913 /* Read this BFD's local symbols. */
6914 if (isymbuf == NULL)
6915 {
6916 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6917 if (isymbuf == NULL)
6918 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6919 symtab_hdr->sh_info, 0,
6920 NULL, NULL, NULL);
6921 if (isymbuf == 0)
6922 goto error_return;
6923 }
6924 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6925 if (isym->st_shndx == SHN_UNDEF)
6926 tsec = bfd_und_section_ptr;
6927 else if (isym->st_shndx == SHN_ABS)
6928 tsec = bfd_abs_section_ptr;
6929 else if (isym->st_shndx == SHN_COMMON)
6930 tsec = bfd_com_section_ptr;
6931 else
6932 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6933
6934 toff = isym->st_value;
6935 sym_type = ELF_ST_TYPE (isym->st_info);
6936 }
6937 else
6938 {
6939 /* Global symbol handling. */
6940 unsigned long indx;
6941
6942 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6943 h = elf_sym_hashes (abfd)[indx];
6944
6945 while (h->root.type == bfd_link_hash_indirect
6946 || h->root.type == bfd_link_hash_warning)
6947 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6948
6949 if (h->root.type == bfd_link_hash_defined
6950 || h->root.type == bfd_link_hash_defweak)
6951 {
6952 tsec = h->root.u.def.section;
6953 toff = h->root.u.def.value;
6954 }
6955 else if (h->root.type == bfd_link_hash_undefined
6956 || h->root.type == bfd_link_hash_undefweak)
6957 {
6958 tsec = bfd_und_section_ptr;
6959 toff = bfd_link_relocatable (link_info) ? indx : 0;
6960 }
6961 else
6962 continue;
6963
6964 /* If this branch is to __tls_get_addr then we may later
6965 optimise away the call. We won't be needing a long-
6966 branch stub in that case. */
6967 if (bfd_link_executable (link_info)
6968 && h == htab->tls_get_addr
6969 && irel != internal_relocs)
6970 {
6971 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6972 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6973 unsigned int tls_mask = 0;
6974
6975 /* The previous reloc should be one of R_PPC_TLSGD or
6976 R_PPC_TLSLD, or for older object files, a reloc
6977 on the __tls_get_addr arg setup insn. Get tls
6978 mask bits from the symbol on that reloc. */
6979 if (t_symndx < symtab_hdr->sh_info)
6980 {
6981 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6982
6983 if (local_got_offsets != NULL)
6984 {
6985 struct plt_entry **local_plt = (struct plt_entry **)
6986 (local_got_offsets + symtab_hdr->sh_info);
6987 char *lgot_masks = (char *)
6988 (local_plt + symtab_hdr->sh_info);
6989 tls_mask = lgot_masks[t_symndx];
6990 }
6991 }
6992 else
6993 {
6994 struct elf_link_hash_entry *th
6995 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6996
6997 while (th->root.type == bfd_link_hash_indirect
6998 || th->root.type == bfd_link_hash_warning)
6999 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7000
7001 tls_mask
7002 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7003 }
7004
7005 /* The mask bits tell us if the call will be
7006 optimised away. */
7007 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7008 && (t_rtype == R_PPC_TLSGD
7009 || t_rtype == R_PPC_GOT_TLSGD16
7010 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7011 continue;
7012 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7013 && (t_rtype == R_PPC_TLSLD
7014 || t_rtype == R_PPC_GOT_TLSLD16
7015 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7016 continue;
7017 }
7018
7019 sym_type = h->type;
7020 }
7021
7022 if (r_type == R_PPC_ADDR16_HA)
7023 {
7024 if (h != NULL
7025 && !h->def_regular
7026 && h->protected_def
7027 && ppc_elf_hash_entry (h)->has_addr16_ha
7028 && ppc_elf_hash_entry (h)->has_addr16_lo)
7029 picfixup_size += 12;
7030 continue;
7031 }
7032
7033 /* The condition here under which we call find_plt_ent must
7034 match that in relocate_section. If we call find_plt_ent here
7035 but not in relocate_section, or vice versa, then the branch
7036 destination used here may be incorrect. */
7037 plist = NULL;
7038 if (h != NULL)
7039 {
7040 /* We know is_branch_reloc (r_type) is true. */
7041 if (h->type == STT_GNU_IFUNC
7042 || r_type == R_PPC_PLTREL24)
7043 plist = &h->plt.plist;
7044 }
7045 else if (sym_type == STT_GNU_IFUNC
7046 && elf_local_got_offsets (abfd) != NULL)
7047 {
7048 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7049 struct plt_entry **local_plt = (struct plt_entry **)
7050 (local_got_offsets + symtab_hdr->sh_info);
7051 plist = local_plt + ELF32_R_SYM (irel->r_info);
7052 }
7053 if (plist != NULL)
7054 {
7055 bfd_vma addend = 0;
7056 struct plt_entry *ent;
7057
7058 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7059 addend = irel->r_addend;
7060 ent = find_plt_ent (plist, got2, addend);
7061 if (ent != NULL)
7062 {
7063 if (htab->plt_type == PLT_NEW
7064 || h == NULL
7065 || !htab->elf.dynamic_sections_created
7066 || h->dynindx == -1)
7067 {
7068 tsec = htab->glink;
7069 toff = ent->glink_offset;
7070 }
7071 else
7072 {
7073 tsec = htab->elf.splt;
7074 toff = ent->plt.offset;
7075 }
7076 }
7077 }
7078
7079 /* If the branch and target are in the same section, you have
7080 no hope of adding stubs. We'll error out later should the
7081 branch overflow. */
7082 if (tsec == isec)
7083 continue;
7084
7085 /* There probably isn't any reason to handle symbols in
7086 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7087 attribute for a code section, and we are only looking at
7088 branches. However, implement it correctly here as a
7089 reference for other target relax_section functions. */
7090 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7091 {
7092 /* At this stage in linking, no SEC_MERGE symbol has been
7093 adjusted, so all references to such symbols need to be
7094 passed through _bfd_merged_section_offset. (Later, in
7095 relocate_section, all SEC_MERGE symbols *except* for
7096 section symbols have been adjusted.)
7097
7098 gas may reduce relocations against symbols in SEC_MERGE
7099 sections to a relocation against the section symbol when
7100 the original addend was zero. When the reloc is against
7101 a section symbol we should include the addend in the
7102 offset passed to _bfd_merged_section_offset, since the
7103 location of interest is the original symbol. On the
7104 other hand, an access to "sym+addend" where "sym" is not
7105 a section symbol should not include the addend; Such an
7106 access is presumed to be an offset from "sym"; The
7107 location of interest is just "sym". */
7108 if (sym_type == STT_SECTION)
7109 toff += irel->r_addend;
7110
7111 toff
7112 = _bfd_merged_section_offset (abfd, &tsec,
7113 elf_section_data (tsec)->sec_info,
7114 toff);
7115
7116 if (sym_type != STT_SECTION)
7117 toff += irel->r_addend;
7118 }
7119 /* PLTREL24 addends are special. */
7120 else if (r_type != R_PPC_PLTREL24)
7121 toff += irel->r_addend;
7122
7123 /* Attempted -shared link of non-pic code loses. */
7124 if ((!bfd_link_relocatable (link_info)
7125 && tsec == bfd_und_section_ptr)
7126 || tsec->output_section == NULL
7127 || (tsec->owner != NULL
7128 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7129 continue;
7130
7131 roff = irel->r_offset;
7132
7133 /* If the branch is in range, no need to do anything. */
7134 if (tsec != bfd_und_section_ptr
7135 && (!bfd_link_relocatable (link_info)
7136 /* A relocatable link may have sections moved during
7137 final link, so do not presume they remain in range. */
7138 || tsec->output_section == isec->output_section))
7139 {
7140 bfd_vma symaddr, reladdr;
7141
7142 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7143 reladdr = isec->output_section->vma + isec->output_offset + roff;
7144 if (symaddr - reladdr + max_branch_offset
7145 < 2 * max_branch_offset)
7146 continue;
7147 }
7148
7149 /* Look for an existing fixup to this address. */
7150 for (f = branch_fixups; f ; f = f->next)
7151 if (f->tsec == tsec && f->toff == toff)
7152 break;
7153
7154 if (f == NULL)
7155 {
7156 size_t size;
7157 unsigned long stub_rtype;
7158
7159 val = trampoff - roff;
7160 if (val >= max_branch_offset)
7161 /* Oh dear, we can't reach a trampoline. Don't try to add
7162 one. We'll report an error later. */
7163 continue;
7164
7165 if (bfd_link_pic (link_info))
7166 {
7167 size = 4 * ARRAY_SIZE (shared_stub_entry);
7168 insn_offset = 12;
7169 }
7170 else
7171 {
7172 size = 4 * ARRAY_SIZE (stub_entry);
7173 insn_offset = 0;
7174 }
7175 stub_rtype = R_PPC_RELAX;
7176 if (tsec == htab->elf.splt
7177 || tsec == htab->glink)
7178 {
7179 stub_rtype = R_PPC_RELAX_PLT;
7180 if (r_type == R_PPC_PLTREL24)
7181 stub_rtype = R_PPC_RELAX_PLTREL24;
7182 }
7183
7184 /* Hijack the old relocation. Since we need two
7185 relocations for this use a "composite" reloc. */
7186 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7187 stub_rtype);
7188 irel->r_offset = trampoff + insn_offset;
7189 if (r_type == R_PPC_PLTREL24
7190 && stub_rtype != R_PPC_RELAX_PLTREL24)
7191 irel->r_addend = 0;
7192
7193 /* Record the fixup so we don't do it again this section. */
7194 f = bfd_malloc (sizeof (*f));
7195 f->next = branch_fixups;
7196 f->tsec = tsec;
7197 f->toff = toff;
7198 f->trampoff = trampoff;
7199 branch_fixups = f;
7200
7201 trampoff += size;
7202 changes++;
7203 }
7204 else
7205 {
7206 val = f->trampoff - roff;
7207 if (val >= max_branch_offset)
7208 continue;
7209
7210 /* Nop out the reloc, since we're finalizing things here. */
7211 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7212 }
7213
7214 /* Get the section contents. */
7215 if (contents == NULL)
7216 {
7217 /* Get cached copy if it exists. */
7218 if (elf_section_data (isec)->this_hdr.contents != NULL)
7219 contents = elf_section_data (isec)->this_hdr.contents;
7220 /* Go get them off disk. */
7221 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7222 goto error_return;
7223 }
7224
7225 /* Fix up the existing branch to hit the trampoline. */
7226 hit_addr = contents + roff;
7227 switch (r_type)
7228 {
7229 case R_PPC_REL24:
7230 case R_PPC_LOCAL24PC:
7231 case R_PPC_PLTREL24:
7232 t0 = bfd_get_32 (abfd, hit_addr);
7233 t0 &= ~0x3fffffc;
7234 t0 |= val & 0x3fffffc;
7235 bfd_put_32 (abfd, t0, hit_addr);
7236 break;
7237
7238 case R_PPC_REL14:
7239 case R_PPC_REL14_BRTAKEN:
7240 case R_PPC_REL14_BRNTAKEN:
7241 t0 = bfd_get_32 (abfd, hit_addr);
7242 t0 &= ~0xfffc;
7243 t0 |= val & 0xfffc;
7244 bfd_put_32 (abfd, t0, hit_addr);
7245 break;
7246 }
7247 }
7248
7249 while (branch_fixups != NULL)
7250 {
7251 struct one_branch_fixup *f = branch_fixups;
7252 branch_fixups = branch_fixups->next;
7253 free (f);
7254 }
7255 }
7256
7257 workaround_change = FALSE;
7258 newsize = trampoff;
7259 if (htab->params->ppc476_workaround
7260 && (!bfd_link_relocatable (link_info)
7261 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7262 {
7263 bfd_vma addr, end_addr;
7264 unsigned int crossings;
7265 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7266
7267 addr = isec->output_section->vma + isec->output_offset;
7268 end_addr = addr + trampoff;
7269 addr &= -pagesize;
7270 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7271 if (crossings != 0)
7272 {
7273 /* Keep space aligned, to ensure the patch code itself does
7274 not cross a page. Don't decrease size calculated on a
7275 previous pass as otherwise we might never settle on a layout. */
7276 newsize = 15 - ((end_addr - 1) & 15);
7277 newsize += crossings * 16;
7278 if (relax_info->workaround_size < newsize)
7279 {
7280 relax_info->workaround_size = newsize;
7281 workaround_change = TRUE;
7282 }
7283 /* Ensure relocate_section is called. */
7284 isec->flags |= SEC_RELOC;
7285 }
7286 newsize = trampoff + relax_info->workaround_size;
7287 }
7288
7289 if (htab->params->pic_fixup > 0)
7290 {
7291 picfixup_size -= relax_info->picfixup_size;
7292 if (picfixup_size != 0)
7293 relax_info->picfixup_size += picfixup_size;
7294 newsize += relax_info->picfixup_size;
7295 }
7296
7297 if (changes != 0 || picfixup_size != 0 || workaround_change)
7298 isec->size = newsize;
7299
7300 if (isymbuf != NULL
7301 && symtab_hdr->contents != (unsigned char *) isymbuf)
7302 {
7303 if (! link_info->keep_memory)
7304 free (isymbuf);
7305 else
7306 {
7307 /* Cache the symbols for elf_link_input_bfd. */
7308 symtab_hdr->contents = (unsigned char *) isymbuf;
7309 }
7310 }
7311
7312 if (contents != NULL
7313 && elf_section_data (isec)->this_hdr.contents != contents)
7314 {
7315 if (!changes && !link_info->keep_memory)
7316 free (contents);
7317 else
7318 {
7319 /* Cache the section contents for elf_link_input_bfd. */
7320 elf_section_data (isec)->this_hdr.contents = contents;
7321 }
7322 }
7323
7324 changes += picfixup_size;
7325 if (changes != 0)
7326 {
7327 /* Append sufficient NOP relocs so we can write out relocation
7328 information for the trampolines. */
7329 Elf_Internal_Shdr *rel_hdr;
7330 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7331 * sizeof (*new_relocs));
7332 unsigned ix;
7333
7334 if (!new_relocs)
7335 goto error_return;
7336 memcpy (new_relocs, internal_relocs,
7337 isec->reloc_count * sizeof (*new_relocs));
7338 for (ix = changes; ix--;)
7339 {
7340 irel = new_relocs + ix + isec->reloc_count;
7341
7342 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7343 }
7344 if (internal_relocs != elf_section_data (isec)->relocs)
7345 free (internal_relocs);
7346 elf_section_data (isec)->relocs = new_relocs;
7347 isec->reloc_count += changes;
7348 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7349 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7350 }
7351 else if (internal_relocs != NULL
7352 && elf_section_data (isec)->relocs != internal_relocs)
7353 free (internal_relocs);
7354
7355 *again = changes != 0 || workaround_change;
7356 return TRUE;
7357
7358 error_return:
7359 while (branch_fixups != NULL)
7360 {
7361 struct one_branch_fixup *f = branch_fixups;
7362 branch_fixups = branch_fixups->next;
7363 free (f);
7364 }
7365 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7366 free (isymbuf);
7367 if (contents != NULL
7368 && elf_section_data (isec)->this_hdr.contents != contents)
7369 free (contents);
7370 if (internal_relocs != NULL
7371 && elf_section_data (isec)->relocs != internal_relocs)
7372 free (internal_relocs);
7373 return FALSE;
7374 }
7375 \f
7376 /* What to do when ld finds relocations against symbols defined in
7377 discarded sections. */
7378
7379 static unsigned int
7380 ppc_elf_action_discarded (asection *sec)
7381 {
7382 if (strcmp (".fixup", sec->name) == 0)
7383 return 0;
7384
7385 if (strcmp (".got2", sec->name) == 0)
7386 return 0;
7387
7388 return _bfd_elf_default_action_discarded (sec);
7389 }
7390 \f
7391 /* Fill in the address for a pointer generated in a linker section. */
7392
7393 static bfd_vma
7394 elf_finish_pointer_linker_section (bfd *input_bfd,
7395 elf_linker_section_t *lsect,
7396 struct elf_link_hash_entry *h,
7397 bfd_vma relocation,
7398 const Elf_Internal_Rela *rel)
7399 {
7400 elf_linker_section_pointers_t *linker_section_ptr;
7401
7402 BFD_ASSERT (lsect != NULL);
7403
7404 if (h != NULL)
7405 {
7406 /* Handle global symbol. */
7407 struct ppc_elf_link_hash_entry *eh;
7408
7409 eh = (struct ppc_elf_link_hash_entry *) h;
7410 BFD_ASSERT (eh->elf.def_regular);
7411 linker_section_ptr = eh->linker_section_pointer;
7412 }
7413 else
7414 {
7415 /* Handle local symbol. */
7416 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7417
7418 BFD_ASSERT (is_ppc_elf (input_bfd));
7419 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7420 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7421 }
7422
7423 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7424 rel->r_addend,
7425 lsect);
7426 BFD_ASSERT (linker_section_ptr != NULL);
7427
7428 /* Offset will always be a multiple of four, so use the bottom bit
7429 as a "written" flag. */
7430 if ((linker_section_ptr->offset & 1) == 0)
7431 {
7432 bfd_put_32 (lsect->section->owner,
7433 relocation + linker_section_ptr->addend,
7434 lsect->section->contents + linker_section_ptr->offset);
7435 linker_section_ptr->offset += 1;
7436 }
7437
7438 relocation = (lsect->section->output_section->vma
7439 + lsect->section->output_offset
7440 + linker_section_ptr->offset - 1
7441 - SYM_VAL (lsect->sym));
7442
7443 #ifdef DEBUG
7444 fprintf (stderr,
7445 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7446 lsect->name, (long) relocation, (long) relocation);
7447 #endif
7448
7449 return relocation;
7450 }
7451
7452 #define PPC_LO(v) ((v) & 0xffff)
7453 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7454 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7455
7456 static void
7457 write_glink_stub (struct elf_link_hash_entry *h, struct plt_entry *ent,
7458 asection *plt_sec, unsigned char *p,
7459 struct bfd_link_info *info)
7460 {
7461 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7462 bfd *output_bfd = info->output_bfd;
7463 bfd_vma plt;
7464 unsigned char *end = p + GLINK_ENTRY_SIZE (htab, h);
7465
7466 if (h != NULL
7467 && h == htab->tls_get_addr
7468 && !htab->params->no_tls_get_addr_opt)
7469 {
7470 bfd_put_32 (output_bfd, LWZ_11_3, p);
7471 p += 4;
7472 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
7473 p += 4;
7474 bfd_put_32 (output_bfd, MR_0_3, p);
7475 p += 4;
7476 bfd_put_32 (output_bfd, CMPWI_11_0, p);
7477 p += 4;
7478 bfd_put_32 (output_bfd, ADD_3_12_2, p);
7479 p += 4;
7480 bfd_put_32 (output_bfd, BEQLR, p);
7481 p += 4;
7482 bfd_put_32 (output_bfd, MR_3_0, p);
7483 p += 4;
7484 bfd_put_32 (output_bfd, NOP, p);
7485 p += 4;
7486 }
7487
7488 plt = ((ent->plt.offset & ~1)
7489 + plt_sec->output_section->vma
7490 + plt_sec->output_offset);
7491
7492 if (bfd_link_pic (info))
7493 {
7494 bfd_vma got = 0;
7495
7496 if (ent->addend >= 32768)
7497 got = (ent->addend
7498 + ent->sec->output_section->vma
7499 + ent->sec->output_offset);
7500 else if (htab->elf.hgot != NULL)
7501 got = SYM_VAL (htab->elf.hgot);
7502
7503 plt -= got;
7504
7505 if (plt + 0x8000 < 0x10000)
7506 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7507 else
7508 {
7509 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7510 p += 4;
7511 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7512 }
7513 }
7514 else
7515 {
7516 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7517 p += 4;
7518 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7519 }
7520 p += 4;
7521 bfd_put_32 (output_bfd, MTCTR_11, p);
7522 p += 4;
7523 bfd_put_32 (output_bfd, BCTR, p);
7524 p += 4;
7525 while (p < end)
7526 {
7527 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7528 p += 4;
7529 }
7530 }
7531
7532 /* Return true if symbol is defined statically. */
7533
7534 static bfd_boolean
7535 is_static_defined (struct elf_link_hash_entry *h)
7536 {
7537 return ((h->root.type == bfd_link_hash_defined
7538 || h->root.type == bfd_link_hash_defweak)
7539 && h->root.u.def.section != NULL
7540 && h->root.u.def.section->output_section != NULL);
7541 }
7542
7543 /* If INSN is an opcode that may be used with an @tls operand, return
7544 the transformed insn for TLS optimisation, otherwise return 0. If
7545 REG is non-zero only match an insn with RB or RA equal to REG. */
7546
7547 unsigned int
7548 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7549 {
7550 unsigned int rtra;
7551
7552 if ((insn & (0x3f << 26)) != 31 << 26)
7553 return 0;
7554
7555 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7556 rtra = insn & ((1 << 26) - (1 << 16));
7557 else if (((insn >> 16) & 0x1f) == reg)
7558 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7559 else
7560 return 0;
7561
7562 if ((insn & (0x3ff << 1)) == 266 << 1)
7563 /* add -> addi. */
7564 insn = 14 << 26;
7565 else if ((insn & (0x1f << 1)) == 23 << 1
7566 && ((insn & (0x1f << 6)) < 14 << 6
7567 || ((insn & (0x1f << 6)) >= 16 << 6
7568 && (insn & (0x1f << 6)) < 24 << 6)))
7569 /* load and store indexed -> dform. */
7570 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7571 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7572 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7573 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7574 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7575 /* lwax -> lwa. */
7576 insn = (58 << 26) | 2;
7577 else
7578 return 0;
7579 insn |= rtra;
7580 return insn;
7581 }
7582
7583 /* If INSN is an opcode that may be used with an @tprel operand, return
7584 the transformed insn for an undefined weak symbol, ie. with the
7585 thread pointer REG operand removed. Otherwise return 0. */
7586
7587 unsigned int
7588 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7589 {
7590 if ((insn & (0x1f << 16)) == reg << 16
7591 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7592 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7593 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7594 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7595 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7596 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7597 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7598 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7599 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7600 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7601 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7602 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7603 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7604 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7605 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7606 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7607 && (insn & 3) != 1)
7608 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7609 && ((insn & 3) == 0 || (insn & 3) == 3))))
7610 {
7611 insn &= ~(0x1f << 16);
7612 }
7613 else if ((insn & (0x1f << 21)) == reg << 21
7614 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7615 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7616 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7617 {
7618 insn &= ~(0x1f << 21);
7619 insn |= (insn & (0x1f << 16)) << 5;
7620 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7621 insn -= 2 >> 26; /* convert to ori,oris */
7622 }
7623 else
7624 insn = 0;
7625 return insn;
7626 }
7627
7628 static bfd_boolean
7629 is_insn_ds_form (unsigned int insn)
7630 {
7631 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7632 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7633 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7634 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7635 }
7636
7637 static bfd_boolean
7638 is_insn_dq_form (unsigned int insn)
7639 {
7640 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7641 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7642 && (insn & 3) == 1));
7643 }
7644
7645 /* The RELOCATE_SECTION function is called by the ELF backend linker
7646 to handle the relocations for a section.
7647
7648 The relocs are always passed as Rela structures; if the section
7649 actually uses Rel structures, the r_addend field will always be
7650 zero.
7651
7652 This function is responsible for adjust the section contents as
7653 necessary, and (if using Rela relocs and generating a
7654 relocatable output file) adjusting the reloc addend as
7655 necessary.
7656
7657 This function does not have to worry about setting the reloc
7658 address or the reloc symbol index.
7659
7660 LOCAL_SYMS is a pointer to the swapped in local symbols.
7661
7662 LOCAL_SECTIONS is an array giving the section in the input file
7663 corresponding to the st_shndx field of each local symbol.
7664
7665 The global hash table entry for the global symbols can be found
7666 via elf_sym_hashes (input_bfd).
7667
7668 When generating relocatable output, this function must handle
7669 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7670 going to be the section symbol corresponding to the output
7671 section, which means that the addend must be adjusted
7672 accordingly. */
7673
7674 static bfd_boolean
7675 ppc_elf_relocate_section (bfd *output_bfd,
7676 struct bfd_link_info *info,
7677 bfd *input_bfd,
7678 asection *input_section,
7679 bfd_byte *contents,
7680 Elf_Internal_Rela *relocs,
7681 Elf_Internal_Sym *local_syms,
7682 asection **local_sections)
7683 {
7684 Elf_Internal_Shdr *symtab_hdr;
7685 struct elf_link_hash_entry **sym_hashes;
7686 struct ppc_elf_link_hash_table *htab;
7687 Elf_Internal_Rela *rel;
7688 Elf_Internal_Rela *wrel;
7689 Elf_Internal_Rela *relend;
7690 Elf_Internal_Rela outrel;
7691 asection *got2;
7692 bfd_vma *local_got_offsets;
7693 bfd_boolean ret = TRUE;
7694 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7695 bfd_boolean is_vxworks_tls;
7696 unsigned int picfixup_size = 0;
7697 struct ppc_elf_relax_info *relax_info = NULL;
7698
7699 #ifdef DEBUG
7700 _bfd_error_handler ("ppc_elf_relocate_section called for %pB section %pA, "
7701 "%ld relocations%s",
7702 input_bfd, input_section,
7703 (long) input_section->reloc_count,
7704 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7705 #endif
7706
7707 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7708
7709 /* Initialize howto table if not already done. */
7710 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7711 ppc_elf_howto_init ();
7712
7713 htab = ppc_elf_hash_table (info);
7714 local_got_offsets = elf_local_got_offsets (input_bfd);
7715 symtab_hdr = &elf_symtab_hdr (input_bfd);
7716 sym_hashes = elf_sym_hashes (input_bfd);
7717 /* We have to handle relocations in vxworks .tls_vars sections
7718 specially, because the dynamic loader is 'weird'. */
7719 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7720 && !strcmp (input_section->output_section->name,
7721 ".tls_vars"));
7722 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7723 relax_info = elf_section_data (input_section)->sec_info;
7724 rel = wrel = relocs;
7725 relend = relocs + input_section->reloc_count;
7726 for (; rel < relend; wrel++, rel++)
7727 {
7728 enum elf_ppc_reloc_type r_type;
7729 bfd_vma addend;
7730 bfd_reloc_status_type r;
7731 Elf_Internal_Sym *sym;
7732 asection *sec;
7733 struct elf_link_hash_entry *h;
7734 const char *sym_name;
7735 reloc_howto_type *howto;
7736 unsigned long r_symndx;
7737 bfd_vma relocation;
7738 bfd_vma branch_bit, from;
7739 bfd_boolean unresolved_reloc;
7740 bfd_boolean warned;
7741 unsigned int tls_type, tls_mask, tls_gd;
7742 struct plt_entry **ifunc;
7743 struct reloc_howto_struct alt_howto;
7744
7745 again:
7746 r_type = ELF32_R_TYPE (rel->r_info);
7747 sym = NULL;
7748 sec = NULL;
7749 h = NULL;
7750 unresolved_reloc = FALSE;
7751 warned = FALSE;
7752 r_symndx = ELF32_R_SYM (rel->r_info);
7753
7754 if (r_symndx < symtab_hdr->sh_info)
7755 {
7756 sym = local_syms + r_symndx;
7757 sec = local_sections[r_symndx];
7758 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7759
7760 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7761 }
7762 else
7763 {
7764 bfd_boolean ignored;
7765
7766 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7767 r_symndx, symtab_hdr, sym_hashes,
7768 h, sec, relocation,
7769 unresolved_reloc, warned, ignored);
7770
7771 sym_name = h->root.root.string;
7772 }
7773
7774 if (sec != NULL && discarded_section (sec))
7775 {
7776 /* For relocs against symbols from removed linkonce sections,
7777 or sections discarded by a linker script, we just want the
7778 section contents zeroed. Avoid any special processing. */
7779 howto = NULL;
7780 if (r_type < R_PPC_max)
7781 howto = ppc_elf_howto_table[r_type];
7782
7783 _bfd_clear_contents (howto, input_bfd, input_section,
7784 contents + rel->r_offset);
7785 wrel->r_offset = rel->r_offset;
7786 wrel->r_info = 0;
7787 wrel->r_addend = 0;
7788
7789 /* For ld -r, remove relocations in debug sections against
7790 symbols defined in discarded sections. Not done for
7791 non-debug to preserve relocs in .eh_frame which the
7792 eh_frame editing code expects to be present. */
7793 if (bfd_link_relocatable (info)
7794 && (input_section->flags & SEC_DEBUGGING))
7795 wrel--;
7796
7797 continue;
7798 }
7799
7800 if (bfd_link_relocatable (info))
7801 {
7802 if (got2 != NULL
7803 && r_type == R_PPC_PLTREL24
7804 && rel->r_addend != 0)
7805 {
7806 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7807 addend specifies the GOT pointer offset within .got2. */
7808 rel->r_addend += got2->output_offset;
7809 }
7810 if (r_type != R_PPC_RELAX_PLT
7811 && r_type != R_PPC_RELAX_PLTREL24
7812 && r_type != R_PPC_RELAX)
7813 goto copy_reloc;
7814 }
7815
7816 /* TLS optimizations. Replace instruction sequences and relocs
7817 based on information we collected in tls_optimize. We edit
7818 RELOCS so that --emit-relocs will output something sensible
7819 for the final instruction stream. */
7820 tls_mask = 0;
7821 tls_gd = 0;
7822 if (h != NULL)
7823 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7824 else if (local_got_offsets != NULL)
7825 {
7826 struct plt_entry **local_plt;
7827 char *lgot_masks;
7828 local_plt
7829 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7830 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7831 tls_mask = lgot_masks[r_symndx];
7832 }
7833
7834 /* Ensure reloc mapping code below stays sane. */
7835 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7836 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7837 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7838 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7839 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7840 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7841 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7842 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7843 abort ();
7844 switch (r_type)
7845 {
7846 default:
7847 break;
7848
7849 case R_PPC_GOT_TPREL16:
7850 case R_PPC_GOT_TPREL16_LO:
7851 if ((tls_mask & TLS_TLS) != 0
7852 && (tls_mask & TLS_TPREL) == 0)
7853 {
7854 bfd_vma insn;
7855
7856 insn = bfd_get_32 (input_bfd,
7857 contents + rel->r_offset - d_offset);
7858 insn &= 31 << 21;
7859 insn |= 0x3c020000; /* addis 0,2,0 */
7860 bfd_put_32 (input_bfd, insn,
7861 contents + rel->r_offset - d_offset);
7862 r_type = R_PPC_TPREL16_HA;
7863 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7864 }
7865 break;
7866
7867 case R_PPC_TLS:
7868 if ((tls_mask & TLS_TLS) != 0
7869 && (tls_mask & TLS_TPREL) == 0)
7870 {
7871 bfd_vma insn;
7872
7873 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7874 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7875 if (insn == 0)
7876 abort ();
7877 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7878 r_type = R_PPC_TPREL16_LO;
7879 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7880
7881 /* Was PPC_TLS which sits on insn boundary, now
7882 PPC_TPREL16_LO which is at low-order half-word. */
7883 rel->r_offset += d_offset;
7884 }
7885 break;
7886
7887 case R_PPC_GOT_TLSGD16_HI:
7888 case R_PPC_GOT_TLSGD16_HA:
7889 tls_gd = TLS_TPRELGD;
7890 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7891 goto tls_gdld_hi;
7892 break;
7893
7894 case R_PPC_GOT_TLSLD16_HI:
7895 case R_PPC_GOT_TLSLD16_HA:
7896 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7897 {
7898 tls_gdld_hi:
7899 if ((tls_mask & tls_gd) != 0)
7900 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7901 + R_PPC_GOT_TPREL16);
7902 else
7903 {
7904 rel->r_offset -= d_offset;
7905 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
7906 r_type = R_PPC_NONE;
7907 }
7908 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7909 }
7910 break;
7911
7912 case R_PPC_GOT_TLSGD16:
7913 case R_PPC_GOT_TLSGD16_LO:
7914 tls_gd = TLS_TPRELGD;
7915 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7916 goto tls_ldgd_opt;
7917 break;
7918
7919 case R_PPC_GOT_TLSLD16:
7920 case R_PPC_GOT_TLSLD16_LO:
7921 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7922 {
7923 unsigned int insn1, insn2;
7924 bfd_vma offset;
7925
7926 tls_ldgd_opt:
7927 offset = (bfd_vma) -1;
7928 /* If not using the newer R_PPC_TLSGD/LD to mark
7929 __tls_get_addr calls, we must trust that the call
7930 stays with its arg setup insns, ie. that the next
7931 reloc is the __tls_get_addr call associated with
7932 the current reloc. Edit both insns. */
7933 if (input_section->has_tls_get_addr_call
7934 && rel + 1 < relend
7935 && branch_reloc_hash_match (input_bfd, rel + 1,
7936 htab->tls_get_addr))
7937 offset = rel[1].r_offset;
7938 /* We read the low GOT_TLS insn because we need to keep
7939 the destination reg. It may be something other than
7940 the usual r3, and moved to r3 before the call by
7941 intervening code. */
7942 insn1 = bfd_get_32 (input_bfd,
7943 contents + rel->r_offset - d_offset);
7944 if ((tls_mask & tls_gd) != 0)
7945 {
7946 /* IE */
7947 insn1 &= (0x1f << 21) | (0x1f << 16);
7948 insn1 |= 32 << 26; /* lwz */
7949 if (offset != (bfd_vma) -1)
7950 {
7951 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7952 insn2 = 0x7c631214; /* add 3,3,2 */
7953 bfd_put_32 (input_bfd, insn2, contents + offset);
7954 }
7955 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7956 + R_PPC_GOT_TPREL16);
7957 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7958 }
7959 else
7960 {
7961 /* LE */
7962 insn1 &= 0x1f << 21;
7963 insn1 |= 0x3c020000; /* addis r,2,0 */
7964 if (tls_gd == 0)
7965 {
7966 /* Was an LD reloc. */
7967 for (r_symndx = 0;
7968 r_symndx < symtab_hdr->sh_info;
7969 r_symndx++)
7970 if (local_sections[r_symndx] == sec)
7971 break;
7972 if (r_symndx >= symtab_hdr->sh_info)
7973 r_symndx = STN_UNDEF;
7974 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7975 if (r_symndx != STN_UNDEF)
7976 rel->r_addend -= (local_syms[r_symndx].st_value
7977 + sec->output_offset
7978 + sec->output_section->vma);
7979 }
7980 r_type = R_PPC_TPREL16_HA;
7981 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7982 if (offset != (bfd_vma) -1)
7983 {
7984 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7985 rel[1].r_offset = offset + d_offset;
7986 rel[1].r_addend = rel->r_addend;
7987 insn2 = 0x38630000; /* addi 3,3,0 */
7988 bfd_put_32 (input_bfd, insn2, contents + offset);
7989 }
7990 }
7991 bfd_put_32 (input_bfd, insn1,
7992 contents + rel->r_offset - d_offset);
7993 if (tls_gd == 0)
7994 {
7995 /* We changed the symbol on an LD reloc. Start over
7996 in order to get h, sym, sec etc. right. */
7997 goto again;
7998 }
7999 }
8000 break;
8001
8002 case R_PPC_TLSGD:
8003 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8004 {
8005 unsigned int insn2;
8006 bfd_vma offset = rel->r_offset;
8007
8008 if ((tls_mask & TLS_TPRELGD) != 0)
8009 {
8010 /* IE */
8011 r_type = R_PPC_NONE;
8012 insn2 = 0x7c631214; /* add 3,3,2 */
8013 }
8014 else
8015 {
8016 /* LE */
8017 r_type = R_PPC_TPREL16_LO;
8018 rel->r_offset += d_offset;
8019 insn2 = 0x38630000; /* addi 3,3,0 */
8020 }
8021 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8022 bfd_put_32 (input_bfd, insn2, contents + offset);
8023 /* Zap the reloc on the _tls_get_addr call too. */
8024 BFD_ASSERT (offset == rel[1].r_offset);
8025 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8026 }
8027 break;
8028
8029 case R_PPC_TLSLD:
8030 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8031 {
8032 unsigned int insn2;
8033
8034 for (r_symndx = 0;
8035 r_symndx < symtab_hdr->sh_info;
8036 r_symndx++)
8037 if (local_sections[r_symndx] == sec)
8038 break;
8039 if (r_symndx >= symtab_hdr->sh_info)
8040 r_symndx = STN_UNDEF;
8041 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8042 if (r_symndx != STN_UNDEF)
8043 rel->r_addend -= (local_syms[r_symndx].st_value
8044 + sec->output_offset
8045 + sec->output_section->vma);
8046
8047 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8048 rel->r_offset += d_offset;
8049 insn2 = 0x38630000; /* addi 3,3,0 */
8050 bfd_put_32 (input_bfd, insn2,
8051 contents + rel->r_offset - d_offset);
8052 /* Zap the reloc on the _tls_get_addr call too. */
8053 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8054 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8055 goto again;
8056 }
8057 break;
8058 }
8059
8060 /* Handle other relocations that tweak non-addend part of insn. */
8061 branch_bit = 0;
8062 switch (r_type)
8063 {
8064 default:
8065 break;
8066
8067 /* Branch taken prediction relocations. */
8068 case R_PPC_ADDR14_BRTAKEN:
8069 case R_PPC_REL14_BRTAKEN:
8070 branch_bit = BRANCH_PREDICT_BIT;
8071 /* Fall through. */
8072
8073 /* Branch not taken prediction relocations. */
8074 case R_PPC_ADDR14_BRNTAKEN:
8075 case R_PPC_REL14_BRNTAKEN:
8076 {
8077 bfd_vma insn;
8078
8079 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8080 insn &= ~BRANCH_PREDICT_BIT;
8081 insn |= branch_bit;
8082
8083 from = (rel->r_offset
8084 + input_section->output_offset
8085 + input_section->output_section->vma);
8086
8087 /* Invert 'y' bit if not the default. */
8088 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8089 insn ^= BRANCH_PREDICT_BIT;
8090
8091 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8092 break;
8093 }
8094 }
8095
8096 if (ELIMINATE_COPY_RELOCS
8097 && h != NULL
8098 && !h->def_regular
8099 && h->protected_def
8100 && ppc_elf_hash_entry (h)->has_addr16_ha
8101 && ppc_elf_hash_entry (h)->has_addr16_lo
8102 && htab->params->pic_fixup > 0)
8103 {
8104 /* Convert lis;addi or lis;load/store accessing a protected
8105 variable defined in a shared library to PIC. */
8106 unsigned int insn;
8107
8108 if (r_type == R_PPC_ADDR16_HA)
8109 {
8110 insn = bfd_get_32 (input_bfd,
8111 contents + rel->r_offset - d_offset);
8112 if ((insn & (0x3f << 26)) == (15u << 26)
8113 && (insn & (0x1f << 16)) == 0 /* lis */)
8114 {
8115 bfd_byte *p;
8116 bfd_vma off;
8117 bfd_vma got_addr;
8118
8119 p = (contents + input_section->size
8120 - relax_info->workaround_size
8121 - relax_info->picfixup_size
8122 + picfixup_size);
8123 off = (p - contents) - (rel->r_offset - d_offset);
8124 if (off > 0x1fffffc || (off & 3) != 0)
8125 info->callbacks->einfo
8126 (_("%H: fixup branch overflow\n"),
8127 input_bfd, input_section, rel->r_offset);
8128
8129 bfd_put_32 (input_bfd, B | off,
8130 contents + rel->r_offset - d_offset);
8131 got_addr = (htab->elf.sgot->output_section->vma
8132 + htab->elf.sgot->output_offset
8133 + (h->got.offset & ~1));
8134 wrel->r_offset = (p - contents) + d_offset;
8135 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8136 wrel->r_addend = got_addr;
8137 insn &= ~0xffff;
8138 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8139 bfd_put_32 (input_bfd, insn, p);
8140
8141 /* Convert lis to lwz, loading address from GOT. */
8142 insn &= ~0xffff;
8143 insn ^= (32u ^ 15u) << 26;
8144 insn |= (insn & (0x1f << 21)) >> 5;
8145 insn |= got_addr & 0xffff;
8146 bfd_put_32 (input_bfd, insn, p + 4);
8147
8148 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8149 picfixup_size += 12;
8150
8151 /* Use one of the spare relocs, so --emit-relocs
8152 output is reasonable. */
8153 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8154 wrel++, rel++;
8155 rel->r_offset = wrel[-1].r_offset + 4;
8156 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8157 rel->r_addend = wrel[-1].r_addend;
8158
8159 /* Continue on as if we had a got reloc, to output
8160 dynamic reloc. */
8161 r_type = R_PPC_GOT16_LO;
8162 }
8163 else
8164 _bfd_error_handler
8165 /* xgettext:c-format */
8166 (_("%pB(%pA+%#" PRIx64 "): error: "
8167 "%s with unexpected instruction %#x"),
8168 input_bfd, input_section, (uint64_t) rel->r_offset,
8169 "R_PPC_ADDR16_HA", insn);
8170 }
8171 else if (r_type == R_PPC_ADDR16_LO)
8172 {
8173 insn = bfd_get_32 (input_bfd,
8174 contents + rel->r_offset - d_offset);
8175 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8176 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8177 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8178 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8179 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8180 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8181 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8182 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8183 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8184 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8185 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8186 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8187 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8188 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8189 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8190 && (insn & 3) != 1)
8191 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8192 && ((insn & 3) == 0 || (insn & 3) == 3)))
8193 {
8194 /* Arrange to apply the reloc addend, if any. */
8195 relocation = 0;
8196 unresolved_reloc = FALSE;
8197 rel->r_info = ELF32_R_INFO (0, r_type);
8198 }
8199 else
8200 _bfd_error_handler
8201 /* xgettext:c-format */
8202 (_("%pB(%pA+%#" PRIx64 "): error: "
8203 "%s with unexpected instruction %#x"),
8204 input_bfd, input_section, (uint64_t) rel->r_offset,
8205 "R_PPC_ADDR16_LO", insn);
8206 }
8207 }
8208
8209 ifunc = NULL;
8210 if (!htab->is_vxworks)
8211 {
8212 struct plt_entry *ent;
8213
8214 if (h != NULL)
8215 {
8216 if (h->type == STT_GNU_IFUNC)
8217 ifunc = &h->plt.plist;
8218 }
8219 else if (local_got_offsets != NULL
8220 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8221 {
8222 struct plt_entry **local_plt;
8223
8224 local_plt = (struct plt_entry **) (local_got_offsets
8225 + symtab_hdr->sh_info);
8226 ifunc = local_plt + r_symndx;
8227 }
8228
8229 ent = NULL;
8230 if (ifunc != NULL
8231 && (!bfd_link_pic (info)
8232 || is_branch_reloc (r_type)))
8233 {
8234 addend = 0;
8235 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8236 addend = rel->r_addend;
8237 ent = find_plt_ent (ifunc, got2, addend);
8238 }
8239 if (ent != NULL)
8240 {
8241 if (bfd_link_pic (info)
8242 && ent->sec != got2
8243 && htab->plt_type != PLT_NEW
8244 && (!htab->elf.dynamic_sections_created
8245 || h == NULL
8246 || h->dynindx == -1))
8247 {
8248 /* Uh oh, we are going to create a pic glink stub
8249 for an ifunc (here for h == NULL and later in
8250 finish_dynamic_symbol for h != NULL), and
8251 apparently are using code compiled with
8252 -mbss-plt. The difficulty is that -mbss-plt code
8253 gives no indication via a magic PLTREL24 addend
8254 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8255 is pointing into a .got2 section (and how far
8256 into .got2). */
8257 info->callbacks->einfo
8258 /* xgettext:c-format */
8259 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8260 input_bfd, input_section, rel->r_offset, sym_name);
8261 }
8262 if (h == NULL && (ent->plt.offset & 1) == 0)
8263 {
8264 Elf_Internal_Rela rela;
8265 bfd_byte *loc;
8266
8267 rela.r_offset = (htab->elf.iplt->output_section->vma
8268 + htab->elf.iplt->output_offset
8269 + ent->plt.offset);
8270 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8271 rela.r_addend = relocation;
8272 loc = htab->elf.irelplt->contents;
8273 loc += (htab->elf.irelplt->reloc_count++
8274 * sizeof (Elf32_External_Rela));
8275 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8276 htab->local_ifunc_resolver = 1;
8277
8278 ent->plt.offset |= 1;
8279 }
8280 if (h == NULL && (ent->glink_offset & 1) == 0)
8281 {
8282 unsigned char *p = ((unsigned char *) htab->glink->contents
8283 + ent->glink_offset);
8284
8285 write_glink_stub (NULL, ent, htab->elf.iplt, p, info);
8286 ent->glink_offset |= 1;
8287 }
8288
8289 unresolved_reloc = FALSE;
8290 if (htab->plt_type == PLT_NEW
8291 || !htab->elf.dynamic_sections_created
8292 || h == NULL
8293 || h->dynindx == -1)
8294 relocation = (htab->glink->output_section->vma
8295 + htab->glink->output_offset
8296 + (ent->glink_offset & ~1));
8297 else
8298 relocation = (htab->elf.splt->output_section->vma
8299 + htab->elf.splt->output_offset
8300 + ent->plt.offset);
8301 }
8302 }
8303
8304 addend = rel->r_addend;
8305 howto = NULL;
8306 if (r_type < R_PPC_max)
8307 howto = ppc_elf_howto_table[r_type];
8308
8309 switch (r_type)
8310 {
8311 default:
8312 break;
8313
8314 case R_PPC_TPREL16_HA:
8315 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8316 {
8317 bfd_byte *p = contents + (rel->r_offset & ~3);
8318 unsigned int insn = bfd_get_32 (input_bfd, p);
8319 if ((insn & ((0x3f << 26) | 0x1f << 16))
8320 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8321 /* xgettext:c-format */
8322 info->callbacks->minfo
8323 (_("%H: warning: %s unexpected insn %#x.\n"),
8324 input_bfd, input_section, rel->r_offset, howto->name, insn);
8325 else
8326 bfd_put_32 (input_bfd, NOP, p);
8327 }
8328 break;
8329
8330 case R_PPC_TPREL16_LO:
8331 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8332 {
8333 bfd_byte *p = contents + (rel->r_offset & ~3);
8334 unsigned int insn = bfd_get_32 (input_bfd, p);
8335 insn &= ~(0x1f << 16);
8336 insn |= 2 << 16;
8337 bfd_put_32 (input_bfd, insn, p);
8338 }
8339 break;
8340 }
8341
8342 tls_type = 0;
8343 switch (r_type)
8344 {
8345 default:
8346 /* xgettext:c-format */
8347 _bfd_error_handler (_("%pB: %s unsupported"),
8348 input_bfd, howto->name);
8349
8350 bfd_set_error (bfd_error_bad_value);
8351 ret = FALSE;
8352 goto copy_reloc;
8353
8354 case R_PPC_NONE:
8355 case R_PPC_TLS:
8356 case R_PPC_TLSGD:
8357 case R_PPC_TLSLD:
8358 case R_PPC_EMB_MRKREF:
8359 case R_PPC_GNU_VTINHERIT:
8360 case R_PPC_GNU_VTENTRY:
8361 goto copy_reloc;
8362
8363 /* GOT16 relocations. Like an ADDR16 using the symbol's
8364 address in the GOT as relocation value instead of the
8365 symbol's value itself. Also, create a GOT entry for the
8366 symbol and put the symbol value there. */
8367 case R_PPC_GOT_TLSGD16:
8368 case R_PPC_GOT_TLSGD16_LO:
8369 case R_PPC_GOT_TLSGD16_HI:
8370 case R_PPC_GOT_TLSGD16_HA:
8371 tls_type = TLS_TLS | TLS_GD;
8372 goto dogot;
8373
8374 case R_PPC_GOT_TLSLD16:
8375 case R_PPC_GOT_TLSLD16_LO:
8376 case R_PPC_GOT_TLSLD16_HI:
8377 case R_PPC_GOT_TLSLD16_HA:
8378 tls_type = TLS_TLS | TLS_LD;
8379 goto dogot;
8380
8381 case R_PPC_GOT_TPREL16:
8382 case R_PPC_GOT_TPREL16_LO:
8383 case R_PPC_GOT_TPREL16_HI:
8384 case R_PPC_GOT_TPREL16_HA:
8385 tls_type = TLS_TLS | TLS_TPREL;
8386 goto dogot;
8387
8388 case R_PPC_GOT_DTPREL16:
8389 case R_PPC_GOT_DTPREL16_LO:
8390 case R_PPC_GOT_DTPREL16_HI:
8391 case R_PPC_GOT_DTPREL16_HA:
8392 tls_type = TLS_TLS | TLS_DTPREL;
8393 goto dogot;
8394
8395 case R_PPC_GOT16:
8396 case R_PPC_GOT16_LO:
8397 case R_PPC_GOT16_HI:
8398 case R_PPC_GOT16_HA:
8399 tls_mask = 0;
8400 dogot:
8401 {
8402 /* Relocation is to the entry for this symbol in the global
8403 offset table. */
8404 bfd_vma off;
8405 bfd_vma *offp;
8406 unsigned long indx;
8407
8408 if (htab->elf.sgot == NULL)
8409 abort ();
8410
8411 indx = 0;
8412 if (tls_type == (TLS_TLS | TLS_LD)
8413 && (h == NULL
8414 || !h->def_dynamic))
8415 offp = &htab->tlsld_got.offset;
8416 else if (h != NULL)
8417 {
8418 if (!htab->elf.dynamic_sections_created
8419 || h->dynindx == -1
8420 || SYMBOL_REFERENCES_LOCAL (info, h)
8421 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8422 /* This is actually a static link, or it is a
8423 -Bsymbolic link and the symbol is defined
8424 locally, or the symbol was forced to be local
8425 because of a version file. */
8426 ;
8427 else
8428 {
8429 indx = h->dynindx;
8430 unresolved_reloc = FALSE;
8431 }
8432 offp = &h->got.offset;
8433 }
8434 else
8435 {
8436 if (local_got_offsets == NULL)
8437 abort ();
8438 offp = &local_got_offsets[r_symndx];
8439 }
8440
8441 /* The offset must always be a multiple of 4. We use the
8442 least significant bit to record whether we have already
8443 processed this entry. */
8444 off = *offp;
8445 if ((off & 1) != 0)
8446 off &= ~1;
8447 else
8448 {
8449 unsigned int tls_m = (tls_mask
8450 & (TLS_LD | TLS_GD | TLS_DTPREL
8451 | TLS_TPREL | TLS_TPRELGD));
8452
8453 if (offp == &htab->tlsld_got.offset)
8454 tls_m = TLS_LD;
8455 else if (h == NULL
8456 || !h->def_dynamic)
8457 tls_m &= ~TLS_LD;
8458
8459 /* We might have multiple got entries for this sym.
8460 Initialize them all. */
8461 do
8462 {
8463 int tls_ty = 0;
8464
8465 if ((tls_m & TLS_LD) != 0)
8466 {
8467 tls_ty = TLS_TLS | TLS_LD;
8468 tls_m &= ~TLS_LD;
8469 }
8470 else if ((tls_m & TLS_GD) != 0)
8471 {
8472 tls_ty = TLS_TLS | TLS_GD;
8473 tls_m &= ~TLS_GD;
8474 }
8475 else if ((tls_m & TLS_DTPREL) != 0)
8476 {
8477 tls_ty = TLS_TLS | TLS_DTPREL;
8478 tls_m &= ~TLS_DTPREL;
8479 }
8480 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8481 {
8482 tls_ty = TLS_TLS | TLS_TPREL;
8483 tls_m = 0;
8484 }
8485
8486 /* Generate relocs for the dynamic linker. */
8487 if (indx != 0
8488 || (bfd_link_pic (info)
8489 && (h == NULL
8490 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8491 || offp == &htab->tlsld_got.offset)
8492 && !(tls_ty == (TLS_TLS | TLS_TPREL)
8493 && bfd_link_executable (info)
8494 && SYMBOL_REFERENCES_LOCAL (info, h))))
8495 {
8496 asection *rsec = htab->elf.srelgot;
8497 bfd_byte * loc;
8498
8499 if (ifunc != NULL)
8500 {
8501 rsec = htab->elf.irelplt;
8502 if (indx == 0)
8503 htab->local_ifunc_resolver = 1;
8504 else if (is_static_defined (h))
8505 htab->maybe_local_ifunc_resolver = 1;
8506 }
8507 outrel.r_offset = (htab->elf.sgot->output_section->vma
8508 + htab->elf.sgot->output_offset
8509 + off);
8510 outrel.r_addend = 0;
8511 if (tls_ty & (TLS_LD | TLS_GD))
8512 {
8513 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8514 if (tls_ty == (TLS_TLS | TLS_GD))
8515 {
8516 loc = rsec->contents;
8517 loc += (rsec->reloc_count++
8518 * sizeof (Elf32_External_Rela));
8519 bfd_elf32_swap_reloca_out (output_bfd,
8520 &outrel, loc);
8521 outrel.r_offset += 4;
8522 outrel.r_info
8523 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8524 }
8525 }
8526 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8527 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8528 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8529 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8530 else if (indx != 0)
8531 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8532 else if (ifunc != NULL)
8533 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8534 else
8535 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8536 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8537 {
8538 outrel.r_addend += relocation;
8539 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8540 {
8541 if (htab->elf.tls_sec == NULL)
8542 outrel.r_addend = 0;
8543 else
8544 outrel.r_addend -= htab->elf.tls_sec->vma;
8545 }
8546 }
8547 loc = rsec->contents;
8548 loc += (rsec->reloc_count++
8549 * sizeof (Elf32_External_Rela));
8550 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8551 }
8552
8553 /* Init the .got section contents if we're not
8554 emitting a reloc. */
8555 else
8556 {
8557 bfd_vma value = relocation;
8558
8559 if (tls_ty != 0)
8560 {
8561 if (htab->elf.tls_sec == NULL)
8562 value = 0;
8563 else
8564 {
8565 if (tls_ty & TLS_LD)
8566 value = 0;
8567 else
8568 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8569 if (tls_ty & TLS_TPREL)
8570 value += DTP_OFFSET - TP_OFFSET;
8571 }
8572
8573 if (tls_ty & (TLS_LD | TLS_GD))
8574 {
8575 bfd_put_32 (input_bfd, value,
8576 htab->elf.sgot->contents + off + 4);
8577 value = 1;
8578 }
8579 }
8580 bfd_put_32 (input_bfd, value,
8581 htab->elf.sgot->contents + off);
8582 }
8583
8584 off += 4;
8585 if (tls_ty & (TLS_LD | TLS_GD))
8586 off += 4;
8587 }
8588 while (tls_m != 0);
8589
8590 off = *offp;
8591 *offp = off | 1;
8592 }
8593
8594 if (off >= (bfd_vma) -2)
8595 abort ();
8596
8597 if ((tls_type & TLS_TLS) != 0)
8598 {
8599 if (tls_type != (TLS_TLS | TLS_LD))
8600 {
8601 if ((tls_mask & TLS_LD) != 0
8602 && !(h == NULL
8603 || !h->def_dynamic))
8604 off += 8;
8605 if (tls_type != (TLS_TLS | TLS_GD))
8606 {
8607 if ((tls_mask & TLS_GD) != 0)
8608 off += 8;
8609 if (tls_type != (TLS_TLS | TLS_DTPREL))
8610 {
8611 if ((tls_mask & TLS_DTPREL) != 0)
8612 off += 4;
8613 }
8614 }
8615 }
8616 }
8617
8618 /* If here for a picfixup, we're done. */
8619 if (r_type != ELF32_R_TYPE (rel->r_info))
8620 goto copy_reloc;
8621
8622 relocation = (htab->elf.sgot->output_section->vma
8623 + htab->elf.sgot->output_offset
8624 + off
8625 - SYM_VAL (htab->elf.hgot));
8626
8627 /* Addends on got relocations don't make much sense.
8628 x+off@got is actually x@got+off, and since the got is
8629 generated by a hash table traversal, the value in the
8630 got at entry m+n bears little relation to the entry m. */
8631 if (addend != 0)
8632 info->callbacks->einfo
8633 /* xgettext:c-format */
8634 (_("%H: non-zero addend on %s reloc against `%s'\n"),
8635 input_bfd, input_section, rel->r_offset,
8636 howto->name,
8637 sym_name);
8638 }
8639 break;
8640
8641 /* Relocations that need no special processing. */
8642 case R_PPC_LOCAL24PC:
8643 /* It makes no sense to point a local relocation
8644 at a symbol not in this object. */
8645 if (unresolved_reloc)
8646 {
8647 (*info->callbacks->undefined_symbol) (info,
8648 h->root.root.string,
8649 input_bfd,
8650 input_section,
8651 rel->r_offset,
8652 TRUE);
8653 goto copy_reloc;
8654 }
8655 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8656 {
8657 /* @local on an ifunc does not really make sense since
8658 the ifunc resolver can take you anywhere. More
8659 seriously, calls to ifuncs must go through a plt call
8660 stub, and for pic the plt call stubs uses r30 to
8661 access the PLT. The problem is that a call that is
8662 local won't have the +32k reloc addend trick marking
8663 -fPIC code, so the linker won't know whether r30 is
8664 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8665 /* xgettext:c-format */
8666 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8667 input_bfd, input_section, rel->r_offset,
8668 h->root.root.string);
8669 }
8670 break;
8671
8672 case R_PPC_DTPREL16:
8673 case R_PPC_DTPREL16_LO:
8674 case R_PPC_DTPREL16_HI:
8675 case R_PPC_DTPREL16_HA:
8676 if (htab->elf.tls_sec != NULL)
8677 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8678 break;
8679
8680 /* Relocations that may need to be propagated if this is a shared
8681 object. */
8682 case R_PPC_TPREL16:
8683 case R_PPC_TPREL16_LO:
8684 case R_PPC_TPREL16_HI:
8685 case R_PPC_TPREL16_HA:
8686 if (h != NULL
8687 && h->root.type == bfd_link_hash_undefweak
8688 && h->dynindx == -1)
8689 {
8690 /* Make this relocation against an undefined weak symbol
8691 resolve to zero. This is really just a tweak, since
8692 code using weak externs ought to check that they are
8693 defined before using them. */
8694 bfd_byte *p = contents + rel->r_offset - d_offset;
8695 unsigned int insn = bfd_get_32 (input_bfd, p);
8696 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8697 if (insn != 0)
8698 bfd_put_32 (input_bfd, insn, p);
8699 break;
8700 }
8701 if (htab->elf.tls_sec != NULL)
8702 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8703 /* The TPREL16 relocs shouldn't really be used in shared
8704 libs or with non-local symbols as that will result in
8705 DT_TEXTREL being set, but support them anyway. */
8706 goto dodyn;
8707
8708 case R_PPC_TPREL32:
8709 if (htab->elf.tls_sec != NULL)
8710 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8711 goto dodyn;
8712
8713 case R_PPC_DTPREL32:
8714 if (htab->elf.tls_sec != NULL)
8715 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8716 goto dodyn;
8717
8718 case R_PPC_DTPMOD32:
8719 relocation = 1;
8720 addend = 0;
8721 goto dodyn;
8722
8723 case R_PPC_REL16:
8724 case R_PPC_REL16_LO:
8725 case R_PPC_REL16_HI:
8726 case R_PPC_REL16_HA:
8727 case R_PPC_REL16DX_HA:
8728 break;
8729
8730 case R_PPC_REL32:
8731 if (h == NULL || h == htab->elf.hgot)
8732 break;
8733 /* fall through */
8734
8735 case R_PPC_ADDR32:
8736 case R_PPC_ADDR16:
8737 case R_PPC_ADDR16_LO:
8738 case R_PPC_ADDR16_HI:
8739 case R_PPC_ADDR16_HA:
8740 case R_PPC_UADDR32:
8741 case R_PPC_UADDR16:
8742 goto dodyn;
8743
8744 case R_PPC_VLE_REL8:
8745 case R_PPC_VLE_REL15:
8746 case R_PPC_VLE_REL24:
8747 case R_PPC_REL24:
8748 case R_PPC_REL14:
8749 case R_PPC_REL14_BRTAKEN:
8750 case R_PPC_REL14_BRNTAKEN:
8751 /* If these relocations are not to a named symbol, they can be
8752 handled right here, no need to bother the dynamic linker. */
8753 if (SYMBOL_CALLS_LOCAL (info, h)
8754 || h == htab->elf.hgot)
8755 break;
8756 /* fall through */
8757
8758 case R_PPC_ADDR24:
8759 case R_PPC_ADDR14:
8760 case R_PPC_ADDR14_BRTAKEN:
8761 case R_PPC_ADDR14_BRNTAKEN:
8762 if (h != NULL && !bfd_link_pic (info))
8763 break;
8764 /* fall through */
8765
8766 dodyn:
8767 if ((input_section->flags & SEC_ALLOC) == 0
8768 || is_vxworks_tls)
8769 break;
8770
8771 if (bfd_link_pic (info)
8772 ? ((h == NULL
8773 || ppc_elf_hash_entry (h)->dyn_relocs != NULL)
8774 && ((h != NULL && pc_dynrelocs (h))
8775 || must_be_dyn_reloc (info, r_type)))
8776 : (h != NULL
8777 && ppc_elf_hash_entry (h)->dyn_relocs != NULL))
8778 {
8779 int skip;
8780 bfd_byte *loc;
8781 asection *sreloc;
8782 long indx = 0;
8783
8784 #ifdef DEBUG
8785 fprintf (stderr, "ppc_elf_relocate_section needs to "
8786 "create relocation for %s\n",
8787 (h && h->root.root.string
8788 ? h->root.root.string : "<unknown>"));
8789 #endif
8790
8791 /* When generating a shared object, these relocations
8792 are copied into the output file to be resolved at run
8793 time. */
8794 skip = 0;
8795 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8796 input_section,
8797 rel->r_offset);
8798 if (outrel.r_offset == (bfd_vma) -1
8799 || outrel.r_offset == (bfd_vma) -2)
8800 skip = (int) outrel.r_offset;
8801 outrel.r_offset += (input_section->output_section->vma
8802 + input_section->output_offset);
8803
8804 if (skip)
8805 memset (&outrel, 0, sizeof outrel);
8806 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
8807 {
8808 indx = h->dynindx;
8809 BFD_ASSERT (indx != -1);
8810 unresolved_reloc = FALSE;
8811 outrel.r_info = ELF32_R_INFO (indx, r_type);
8812 outrel.r_addend = rel->r_addend;
8813 }
8814 else
8815 {
8816 outrel.r_addend = relocation + rel->r_addend;
8817
8818 if (r_type != R_PPC_ADDR32)
8819 {
8820 if (ifunc != NULL)
8821 {
8822 /* If we get here when building a static
8823 executable, then the libc startup function
8824 responsible for applying indirect function
8825 relocations is going to complain about
8826 the reloc type.
8827 If we get here when building a dynamic
8828 executable, it will be because we have
8829 a text relocation. The dynamic loader
8830 will set the text segment writable and
8831 non-executable to apply text relocations.
8832 So we'll segfault when trying to run the
8833 indirection function to resolve the reloc. */
8834 info->callbacks->einfo
8835 /* xgettext:c-format */
8836 (_("%H: relocation %s for indirect "
8837 "function %s unsupported\n"),
8838 input_bfd, input_section, rel->r_offset,
8839 howto->name,
8840 sym_name);
8841 ret = FALSE;
8842 }
8843 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8844 ;
8845 else if (sec == NULL || sec->owner == NULL)
8846 {
8847 bfd_set_error (bfd_error_bad_value);
8848 ret = FALSE;
8849 }
8850 else
8851 {
8852 asection *osec;
8853
8854 /* We are turning this relocation into one
8855 against a section symbol. It would be
8856 proper to subtract the symbol's value,
8857 osec->vma, from the emitted reloc addend,
8858 but ld.so expects buggy relocs.
8859 FIXME: Why not always use a zero index? */
8860 osec = sec->output_section;
8861 indx = elf_section_data (osec)->dynindx;
8862 if (indx == 0)
8863 {
8864 osec = htab->elf.text_index_section;
8865 indx = elf_section_data (osec)->dynindx;
8866 }
8867 BFD_ASSERT (indx != 0);
8868 #ifdef DEBUG
8869 if (indx == 0)
8870 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8871 indx, osec->name, osec->flags,
8872 h->root.root.string);
8873 #endif
8874 }
8875
8876 outrel.r_info = ELF32_R_INFO (indx, r_type);
8877 }
8878 else if (ifunc != NULL)
8879 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8880 else
8881 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8882 }
8883
8884 sreloc = elf_section_data (input_section)->sreloc;
8885 if (ifunc)
8886 {
8887 sreloc = htab->elf.irelplt;
8888 if (indx == 0)
8889 htab->local_ifunc_resolver = 1;
8890 else if (is_static_defined (h))
8891 htab->maybe_local_ifunc_resolver = 1;
8892 }
8893 if (sreloc == NULL)
8894 return FALSE;
8895
8896 loc = sreloc->contents;
8897 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8898 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8899
8900 if (skip == -1)
8901 goto copy_reloc;
8902
8903 /* This reloc will be computed at runtime. Clear the memory
8904 so that it contains a predictable value for prelink. */
8905 if (!skip)
8906 {
8907 relocation = howto->pc_relative ? outrel.r_offset : 0;
8908 addend = 0;
8909 break;
8910 }
8911 }
8912 break;
8913
8914 case R_PPC_RELAX_PLT:
8915 case R_PPC_RELAX_PLTREL24:
8916 if (h != NULL)
8917 {
8918 struct plt_entry *ent;
8919 bfd_vma got2_addend = 0;
8920
8921 if (r_type == R_PPC_RELAX_PLTREL24)
8922 {
8923 if (bfd_link_pic (info))
8924 got2_addend = addend;
8925 addend = 0;
8926 }
8927 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8928 if (htab->plt_type == PLT_NEW)
8929 relocation = (htab->glink->output_section->vma
8930 + htab->glink->output_offset
8931 + ent->glink_offset);
8932 else
8933 relocation = (htab->elf.splt->output_section->vma
8934 + htab->elf.splt->output_offset
8935 + ent->plt.offset);
8936 }
8937 /* Fall through. */
8938
8939 case R_PPC_RELAX:
8940 {
8941 const int *stub;
8942 size_t size;
8943 size_t insn_offset = rel->r_offset;
8944 unsigned int insn;
8945
8946 if (bfd_link_pic (info))
8947 {
8948 relocation -= (input_section->output_section->vma
8949 + input_section->output_offset
8950 + rel->r_offset - 4);
8951 stub = shared_stub_entry;
8952 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
8953 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
8954 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
8955 stub += 3;
8956 size = ARRAY_SIZE (shared_stub_entry) - 3;
8957 }
8958 else
8959 {
8960 stub = stub_entry;
8961 size = ARRAY_SIZE (stub_entry);
8962 }
8963
8964 relocation += addend;
8965 if (bfd_link_relocatable (info))
8966 relocation = 0;
8967
8968 /* First insn is HA, second is LO. */
8969 insn = *stub++;
8970 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8971 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8972 insn_offset += 4;
8973
8974 insn = *stub++;
8975 insn |= relocation & 0xffff;
8976 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8977 insn_offset += 4;
8978 size -= 2;
8979
8980 while (size != 0)
8981 {
8982 insn = *stub++;
8983 --size;
8984 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8985 insn_offset += 4;
8986 }
8987
8988 /* Rewrite the reloc and convert one of the trailing nop
8989 relocs to describe this relocation. */
8990 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8991 /* The relocs are at the bottom 2 bytes */
8992 wrel->r_offset = rel->r_offset + d_offset;
8993 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8994 wrel->r_addend = rel->r_addend;
8995 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
8996 wrel++, rel++;
8997 wrel->r_offset += 4;
8998 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8999 }
9000 continue;
9001
9002 /* Indirect .sdata relocation. */
9003 case R_PPC_EMB_SDAI16:
9004 BFD_ASSERT (htab->sdata[0].section != NULL);
9005 if (!is_static_defined (htab->sdata[0].sym))
9006 {
9007 unresolved_reloc = TRUE;
9008 break;
9009 }
9010 relocation
9011 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9012 h, relocation, rel);
9013 addend = 0;
9014 break;
9015
9016 /* Indirect .sdata2 relocation. */
9017 case R_PPC_EMB_SDA2I16:
9018 BFD_ASSERT (htab->sdata[1].section != NULL);
9019 if (!is_static_defined (htab->sdata[1].sym))
9020 {
9021 unresolved_reloc = TRUE;
9022 break;
9023 }
9024 relocation
9025 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9026 h, relocation, rel);
9027 addend = 0;
9028 break;
9029
9030 /* Handle the TOC16 reloc. We want to use the offset within the .got
9031 section, not the actual VMA. This is appropriate when generating
9032 an embedded ELF object, for which the .got section acts like the
9033 AIX .toc section. */
9034 case R_PPC_TOC16: /* phony GOT16 relocations */
9035 if (sec == NULL || sec->output_section == NULL)
9036 {
9037 unresolved_reloc = TRUE;
9038 break;
9039 }
9040 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9041 ".got") == 0
9042 || strcmp (bfd_get_section_name (sec->owner, sec),
9043 ".cgot") == 0);
9044
9045 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9046 break;
9047
9048 case R_PPC_PLTREL24:
9049 if (h != NULL && ifunc == NULL)
9050 {
9051 struct plt_entry *ent;
9052
9053 ent = find_plt_ent (&h->plt.plist, got2,
9054 bfd_link_pic (info) ? addend : 0);
9055 if (ent == NULL
9056 || htab->elf.splt == NULL)
9057 {
9058 /* We didn't make a PLT entry for this symbol. This
9059 happens when statically linking PIC code, or when
9060 using -Bsymbolic. */
9061 }
9062 else
9063 {
9064 /* Relocation is to the entry for this symbol in the
9065 procedure linkage table. */
9066 unresolved_reloc = FALSE;
9067 if (htab->plt_type == PLT_NEW)
9068 relocation = (htab->glink->output_section->vma
9069 + htab->glink->output_offset
9070 + ent->glink_offset);
9071 else
9072 relocation = (htab->elf.splt->output_section->vma
9073 + htab->elf.splt->output_offset
9074 + ent->plt.offset);
9075 }
9076 }
9077
9078 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9079 addend specifies the GOT pointer offset within .got2.
9080 Don't apply it to the relocation field. */
9081 addend = 0;
9082 break;
9083
9084 /* Relocate against _SDA_BASE_. */
9085 case R_PPC_SDAREL16:
9086 {
9087 const char *name;
9088 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9089
9090 if (sec == NULL
9091 || sec->output_section == NULL
9092 || !is_static_defined (sda))
9093 {
9094 unresolved_reloc = TRUE;
9095 break;
9096 }
9097 addend -= SYM_VAL (sda);
9098
9099 name = bfd_get_section_name (output_bfd, sec->output_section);
9100 if (!(strcmp (name, ".sdata") == 0
9101 || strcmp (name, ".sbss") == 0))
9102 {
9103 _bfd_error_handler
9104 /* xgettext:c-format */
9105 (_("%pB: the target (%s) of a %s relocation is "
9106 "in the wrong output section (%s)"),
9107 input_bfd,
9108 sym_name,
9109 howto->name,
9110 name);
9111 }
9112 }
9113 break;
9114
9115 /* Relocate against _SDA2_BASE_. */
9116 case R_PPC_EMB_SDA2REL:
9117 {
9118 const char *name;
9119 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9120
9121 if (sec == NULL
9122 || sec->output_section == NULL
9123 || !is_static_defined (sda))
9124 {
9125 unresolved_reloc = TRUE;
9126 break;
9127 }
9128 addend -= SYM_VAL (sda);
9129
9130 name = bfd_get_section_name (output_bfd, sec->output_section);
9131 if (!(strcmp (name, ".sdata2") == 0
9132 || strcmp (name, ".sbss2") == 0))
9133 {
9134 _bfd_error_handler
9135 /* xgettext:c-format */
9136 (_("%pB: the target (%s) of a %s relocation is "
9137 "in the wrong output section (%s)"),
9138 input_bfd,
9139 sym_name,
9140 howto->name,
9141 name);
9142 }
9143 }
9144 break;
9145
9146 case R_PPC_VLE_LO16A:
9147 relocation = relocation + addend;
9148 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9149 contents + rel->r_offset, relocation,
9150 split16a_type, htab->params->vle_reloc_fixup);
9151 goto copy_reloc;
9152
9153 case R_PPC_VLE_LO16D:
9154 relocation = relocation + addend;
9155 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9156 contents + rel->r_offset, relocation,
9157 split16d_type, htab->params->vle_reloc_fixup);
9158 goto copy_reloc;
9159
9160 case R_PPC_VLE_HI16A:
9161 relocation = (relocation + addend) >> 16;
9162 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9163 contents + rel->r_offset, relocation,
9164 split16a_type, htab->params->vle_reloc_fixup);
9165 goto copy_reloc;
9166
9167 case R_PPC_VLE_HI16D:
9168 relocation = (relocation + addend) >> 16;
9169 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9170 contents + rel->r_offset, relocation,
9171 split16d_type, htab->params->vle_reloc_fixup);
9172 goto copy_reloc;
9173
9174 case R_PPC_VLE_HA16A:
9175 relocation = (relocation + addend + 0x8000) >> 16;
9176 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9177 contents + rel->r_offset, relocation,
9178 split16a_type, htab->params->vle_reloc_fixup);
9179 goto copy_reloc;
9180
9181 case R_PPC_VLE_HA16D:
9182 relocation = (relocation + addend + 0x8000) >> 16;
9183 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9184 contents + rel->r_offset, relocation,
9185 split16d_type, htab->params->vle_reloc_fixup);
9186 goto copy_reloc;
9187
9188 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9189 case R_PPC_EMB_SDA21:
9190 case R_PPC_VLE_SDA21:
9191 case R_PPC_EMB_RELSDA:
9192 case R_PPC_VLE_SDA21_LO:
9193 {
9194 const char *name;
9195 int reg;
9196 unsigned int insn;
9197 struct elf_link_hash_entry *sda = NULL;
9198
9199 if (sec == NULL || sec->output_section == NULL)
9200 {
9201 unresolved_reloc = TRUE;
9202 break;
9203 }
9204
9205 name = bfd_get_section_name (output_bfd, sec->output_section);
9206 if (strcmp (name, ".sdata") == 0
9207 || strcmp (name, ".sbss") == 0)
9208 {
9209 reg = 13;
9210 sda = htab->sdata[0].sym;
9211 }
9212 else if (strcmp (name, ".sdata2") == 0
9213 || strcmp (name, ".sbss2") == 0)
9214 {
9215 reg = 2;
9216 sda = htab->sdata[1].sym;
9217 }
9218 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9219 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9220 {
9221 reg = 0;
9222 }
9223 else
9224 {
9225 _bfd_error_handler
9226 /* xgettext:c-format */
9227 (_("%pB: the target (%s) of a %s relocation is "
9228 "in the wrong output section (%s)"),
9229 input_bfd,
9230 sym_name,
9231 howto->name,
9232 name);
9233
9234 bfd_set_error (bfd_error_bad_value);
9235 ret = FALSE;
9236 goto copy_reloc;
9237 }
9238
9239 if (sda != NULL)
9240 {
9241 if (!is_static_defined (sda))
9242 {
9243 unresolved_reloc = TRUE;
9244 break;
9245 }
9246 addend -= SYM_VAL (sda);
9247 }
9248
9249 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9250 if (reg == 0
9251 && (r_type == R_PPC_VLE_SDA21
9252 || r_type == R_PPC_VLE_SDA21_LO))
9253 {
9254 relocation = relocation + addend;
9255 addend = 0;
9256
9257 /* Force e_li insn, keeping RT from original insn. */
9258 insn &= 0x1f << 21;
9259 insn |= 28u << 26;
9260
9261 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9262 /* Top 4 bits of value to 17..20. */
9263 insn |= (relocation & 0xf0000) >> 5;
9264 /* Next 5 bits of the value to 11..15. */
9265 insn |= (relocation & 0xf800) << 5;
9266 /* And the final 11 bits of the value to bits 21 to 31. */
9267 insn |= relocation & 0x7ff;
9268
9269 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9270
9271 if (r_type == R_PPC_VLE_SDA21
9272 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9273 goto overflow;
9274 goto copy_reloc;
9275 }
9276 else if (r_type == R_PPC_EMB_SDA21
9277 || r_type == R_PPC_VLE_SDA21
9278 || r_type == R_PPC_VLE_SDA21_LO)
9279 {
9280 /* Fill in register field. */
9281 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9282 }
9283 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9284 }
9285 break;
9286
9287 case R_PPC_VLE_SDAREL_LO16A:
9288 case R_PPC_VLE_SDAREL_LO16D:
9289 case R_PPC_VLE_SDAREL_HI16A:
9290 case R_PPC_VLE_SDAREL_HI16D:
9291 case R_PPC_VLE_SDAREL_HA16A:
9292 case R_PPC_VLE_SDAREL_HA16D:
9293 {
9294 bfd_vma value;
9295 const char *name;
9296 struct elf_link_hash_entry *sda = NULL;
9297
9298 if (sec == NULL || sec->output_section == NULL)
9299 {
9300 unresolved_reloc = TRUE;
9301 break;
9302 }
9303
9304 name = bfd_get_section_name (output_bfd, sec->output_section);
9305 if (strcmp (name, ".sdata") == 0
9306 || strcmp (name, ".sbss") == 0)
9307 sda = htab->sdata[0].sym;
9308 else if (strcmp (name, ".sdata2") == 0
9309 || strcmp (name, ".sbss2") == 0)
9310 sda = htab->sdata[1].sym;
9311 else
9312 {
9313 _bfd_error_handler
9314 /* xgettext:c-format */
9315 (_("%pB: the target (%s) of a %s relocation is "
9316 "in the wrong output section (%s)"),
9317 input_bfd,
9318 sym_name,
9319 howto->name,
9320 name);
9321
9322 bfd_set_error (bfd_error_bad_value);
9323 ret = FALSE;
9324 goto copy_reloc;
9325 }
9326
9327 if (sda == NULL || !is_static_defined (sda))
9328 {
9329 unresolved_reloc = TRUE;
9330 break;
9331 }
9332 value = relocation + addend - SYM_VAL (sda);
9333
9334 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9335 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9336 contents + rel->r_offset, value,
9337 split16a_type,
9338 htab->params->vle_reloc_fixup);
9339 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9340 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9341 contents + rel->r_offset, value,
9342 split16d_type,
9343 htab->params->vle_reloc_fixup);
9344 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9345 {
9346 value = value >> 16;
9347 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9348 contents + rel->r_offset, value,
9349 split16a_type,
9350 htab->params->vle_reloc_fixup);
9351 }
9352 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9353 {
9354 value = value >> 16;
9355 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9356 contents + rel->r_offset, value,
9357 split16d_type,
9358 htab->params->vle_reloc_fixup);
9359 }
9360 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9361 {
9362 value = (value + 0x8000) >> 16;
9363 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9364 contents + rel->r_offset, value,
9365 split16a_type,
9366 htab->params->vle_reloc_fixup);
9367 }
9368 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9369 {
9370 value = (value + 0x8000) >> 16;
9371 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9372 contents + rel->r_offset, value,
9373 split16d_type,
9374 htab->params->vle_reloc_fixup);
9375 }
9376 }
9377 goto copy_reloc;
9378
9379 case R_PPC_VLE_ADDR20:
9380 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9381 continue;
9382
9383 /* Relocate against the beginning of the section. */
9384 case R_PPC_SECTOFF:
9385 case R_PPC_SECTOFF_LO:
9386 case R_PPC_SECTOFF_HI:
9387 case R_PPC_SECTOFF_HA:
9388 if (sec == NULL || sec->output_section == NULL)
9389 {
9390 unresolved_reloc = TRUE;
9391 break;
9392 }
9393 addend -= sec->output_section->vma;
9394 break;
9395
9396 /* Negative relocations. */
9397 case R_PPC_EMB_NADDR32:
9398 case R_PPC_EMB_NADDR16:
9399 case R_PPC_EMB_NADDR16_LO:
9400 case R_PPC_EMB_NADDR16_HI:
9401 case R_PPC_EMB_NADDR16_HA:
9402 addend -= 2 * relocation;
9403 break;
9404
9405 case R_PPC_COPY:
9406 case R_PPC_GLOB_DAT:
9407 case R_PPC_JMP_SLOT:
9408 case R_PPC_RELATIVE:
9409 case R_PPC_IRELATIVE:
9410 case R_PPC_PLT32:
9411 case R_PPC_PLTREL32:
9412 case R_PPC_PLT16_LO:
9413 case R_PPC_PLT16_HI:
9414 case R_PPC_PLT16_HA:
9415 case R_PPC_ADDR30:
9416 case R_PPC_EMB_RELSEC16:
9417 case R_PPC_EMB_RELST_LO:
9418 case R_PPC_EMB_RELST_HI:
9419 case R_PPC_EMB_RELST_HA:
9420 case R_PPC_EMB_BIT_FLD:
9421 /* xgettext:c-format */
9422 _bfd_error_handler (_("%pB: %s unsupported"),
9423 input_bfd, howto->name);
9424
9425 bfd_set_error (bfd_error_invalid_operation);
9426 ret = FALSE;
9427 goto copy_reloc;
9428 }
9429
9430 /* Do any further special processing. */
9431 switch (r_type)
9432 {
9433 default:
9434 break;
9435
9436 case R_PPC_ADDR16_HA:
9437 case R_PPC_REL16_HA:
9438 case R_PPC_REL16DX_HA:
9439 case R_PPC_SECTOFF_HA:
9440 case R_PPC_TPREL16_HA:
9441 case R_PPC_DTPREL16_HA:
9442 case R_PPC_EMB_NADDR16_HA:
9443 case R_PPC_EMB_RELST_HA:
9444 /* It's just possible that this symbol is a weak symbol
9445 that's not actually defined anywhere. In that case,
9446 'sec' would be NULL, and we should leave the symbol
9447 alone (it will be set to zero elsewhere in the link). */
9448 if (sec == NULL)
9449 break;
9450 /* Fall through. */
9451
9452 case R_PPC_PLT16_HA:
9453 case R_PPC_GOT16_HA:
9454 case R_PPC_GOT_TLSGD16_HA:
9455 case R_PPC_GOT_TLSLD16_HA:
9456 case R_PPC_GOT_TPREL16_HA:
9457 case R_PPC_GOT_DTPREL16_HA:
9458 /* Add 0x10000 if sign bit in 0:15 is set.
9459 Bits 0:15 are not used. */
9460 addend += 0x8000;
9461 break;
9462
9463 case R_PPC_ADDR16:
9464 case R_PPC_ADDR16_LO:
9465 case R_PPC_GOT16:
9466 case R_PPC_GOT16_LO:
9467 case R_PPC_SDAREL16:
9468 case R_PPC_SECTOFF:
9469 case R_PPC_SECTOFF_LO:
9470 case R_PPC_DTPREL16:
9471 case R_PPC_DTPREL16_LO:
9472 case R_PPC_TPREL16:
9473 case R_PPC_TPREL16_LO:
9474 case R_PPC_GOT_TLSGD16:
9475 case R_PPC_GOT_TLSGD16_LO:
9476 case R_PPC_GOT_TLSLD16:
9477 case R_PPC_GOT_TLSLD16_LO:
9478 case R_PPC_GOT_DTPREL16:
9479 case R_PPC_GOT_DTPREL16_LO:
9480 case R_PPC_GOT_TPREL16:
9481 case R_PPC_GOT_TPREL16_LO:
9482 {
9483 /* The 32-bit ABI lacks proper relocations to deal with
9484 certain 64-bit instructions. Prevent damage to bits
9485 that make up part of the insn opcode. */
9486 unsigned int insn, mask, lobit;
9487
9488 insn = bfd_get_32 (input_bfd,
9489 contents + rel->r_offset - d_offset);
9490 mask = 0;
9491 if (is_insn_ds_form (insn))
9492 mask = 3;
9493 else if (is_insn_dq_form (insn))
9494 mask = 15;
9495 else
9496 break;
9497 relocation += addend;
9498 addend = insn & mask;
9499 lobit = mask & relocation;
9500 if (lobit != 0)
9501 {
9502 relocation ^= lobit;
9503 info->callbacks->einfo
9504 /* xgettext:c-format */
9505 (_("%H: error: %s against `%s' not a multiple of %u\n"),
9506 input_bfd, input_section, rel->r_offset,
9507 howto->name, sym_name, mask + 1);
9508 bfd_set_error (bfd_error_bad_value);
9509 ret = FALSE;
9510 }
9511 }
9512 break;
9513 }
9514
9515 #ifdef DEBUG
9516 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9517 "offset = %ld, addend = %ld\n",
9518 howto->name,
9519 (int) r_type,
9520 sym_name,
9521 r_symndx,
9522 (long) rel->r_offset,
9523 (long) addend);
9524 #endif
9525
9526 if (unresolved_reloc
9527 && !((input_section->flags & SEC_DEBUGGING) != 0
9528 && h->def_dynamic)
9529 && _bfd_elf_section_offset (output_bfd, info, input_section,
9530 rel->r_offset) != (bfd_vma) -1)
9531 {
9532 info->callbacks->einfo
9533 /* xgettext:c-format */
9534 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
9535 input_bfd, input_section, rel->r_offset,
9536 howto->name,
9537 sym_name);
9538 ret = FALSE;
9539 }
9540
9541 /* 16-bit fields in insns mostly have signed values, but a
9542 few insns have 16-bit unsigned values. Really, we should
9543 have different reloc types. */
9544 if (howto->complain_on_overflow != complain_overflow_dont
9545 && howto->dst_mask == 0xffff
9546 && (input_section->flags & SEC_CODE) != 0)
9547 {
9548 enum complain_overflow complain = complain_overflow_signed;
9549
9550 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9551 {
9552 unsigned int insn;
9553
9554 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9555 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9556 complain = complain_overflow_bitfield;
9557 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9558 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9559 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9560 complain = complain_overflow_unsigned;
9561 }
9562 if (howto->complain_on_overflow != complain)
9563 {
9564 alt_howto = *howto;
9565 alt_howto.complain_on_overflow = complain;
9566 howto = &alt_howto;
9567 }
9568 }
9569
9570 if (r_type == R_PPC_REL16DX_HA)
9571 {
9572 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9573 if (rel->r_offset + 4 > input_section->size)
9574 r = bfd_reloc_outofrange;
9575 else
9576 {
9577 unsigned int insn;
9578
9579 relocation += addend;
9580 relocation -= (rel->r_offset
9581 + input_section->output_offset
9582 + input_section->output_section->vma);
9583 relocation >>= 16;
9584 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9585 insn &= ~0x1fffc1;
9586 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9587 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9588 r = bfd_reloc_ok;
9589 }
9590 }
9591 else
9592 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9593 rel->r_offset, relocation, addend);
9594
9595 if (r != bfd_reloc_ok)
9596 {
9597 if (r == bfd_reloc_overflow)
9598 {
9599 overflow:
9600 /* On code like "if (foo) foo();" don't report overflow
9601 on a branch to zero when foo is undefined. */
9602 if (!warned
9603 && !(h != NULL
9604 && (h->root.type == bfd_link_hash_undefweak
9605 || h->root.type == bfd_link_hash_undefined)
9606 && is_branch_reloc (r_type)))
9607 info->callbacks->reloc_overflow
9608 (info, (h ? &h->root : NULL), sym_name, howto->name,
9609 rel->r_addend, input_bfd, input_section, rel->r_offset);
9610 }
9611 else
9612 {
9613 info->callbacks->einfo
9614 /* xgettext:c-format */
9615 (_("%H: %s reloc against `%s': error %d\n"),
9616 input_bfd, input_section, rel->r_offset,
9617 howto->name, sym_name, (int) r);
9618 ret = FALSE;
9619 }
9620 }
9621 copy_reloc:
9622 if (wrel != rel)
9623 *wrel = *rel;
9624 }
9625
9626 if (wrel != rel)
9627 {
9628 Elf_Internal_Shdr *rel_hdr;
9629 size_t deleted = rel - wrel;
9630
9631 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9632 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9633 if (rel_hdr->sh_size == 0)
9634 {
9635 /* It is too late to remove an empty reloc section. Leave
9636 one NONE reloc.
9637 ??? What is wrong with an empty section??? */
9638 rel_hdr->sh_size = rel_hdr->sh_entsize;
9639 deleted -= 1;
9640 wrel++;
9641 }
9642 relend = wrel;
9643 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9644 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9645 input_section->reloc_count -= deleted;
9646 }
9647
9648 #ifdef DEBUG
9649 fprintf (stderr, "\n");
9650 #endif
9651
9652 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9653 && input_section->size != input_section->rawsize
9654 && (strcmp (input_section->output_section->name, ".init") == 0
9655 || strcmp (input_section->output_section->name, ".fini") == 0))
9656 {
9657 /* Branch around the trampolines. */
9658 unsigned int insn = B + input_section->size - input_section->rawsize;
9659 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9660 }
9661
9662 if (htab->params->ppc476_workaround
9663 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9664 && (!bfd_link_relocatable (info)
9665 || (input_section->output_section->alignment_power
9666 >= htab->params->pagesize_p2)))
9667 {
9668 bfd_vma start_addr, end_addr, addr;
9669 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9670
9671 if (relax_info->workaround_size != 0)
9672 {
9673 bfd_byte *p;
9674 unsigned int n;
9675 bfd_byte fill[4];
9676
9677 bfd_put_32 (input_bfd, BA, fill);
9678 p = contents + input_section->size - relax_info->workaround_size;
9679 n = relax_info->workaround_size >> 2;
9680 while (n--)
9681 {
9682 memcpy (p, fill, 4);
9683 p += 4;
9684 }
9685 }
9686
9687 /* The idea is: Replace the last instruction on a page with a
9688 branch to a patch area. Put the insn there followed by a
9689 branch back to the next page. Complicated a little by
9690 needing to handle moved conditional branches, and by not
9691 wanting to touch data-in-text. */
9692
9693 start_addr = (input_section->output_section->vma
9694 + input_section->output_offset);
9695 end_addr = (start_addr + input_section->size
9696 - relax_info->workaround_size);
9697 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9698 addr < end_addr;
9699 addr += pagesize)
9700 {
9701 bfd_vma offset = addr - start_addr;
9702 Elf_Internal_Rela *lo, *hi;
9703 bfd_boolean is_data;
9704 bfd_vma patch_off, patch_addr;
9705 unsigned int insn;
9706
9707 /* Do we have a data reloc at this offset? If so, leave
9708 the word alone. */
9709 is_data = FALSE;
9710 lo = relocs;
9711 hi = relend;
9712 rel = NULL;
9713 while (lo < hi)
9714 {
9715 rel = lo + (hi - lo) / 2;
9716 if (rel->r_offset < offset)
9717 lo = rel + 1;
9718 else if (rel->r_offset > offset + 3)
9719 hi = rel;
9720 else
9721 {
9722 switch (ELF32_R_TYPE (rel->r_info))
9723 {
9724 case R_PPC_ADDR32:
9725 case R_PPC_UADDR32:
9726 case R_PPC_REL32:
9727 case R_PPC_ADDR30:
9728 is_data = TRUE;
9729 break;
9730 default:
9731 break;
9732 }
9733 break;
9734 }
9735 }
9736 if (is_data)
9737 continue;
9738
9739 /* Some instructions can be left alone too. Unconditional
9740 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9741 avoid the icache failure.
9742
9743 The problem occurs due to prefetch across a page boundary
9744 where stale instructions can be fetched from the next
9745 page, and the mechanism for flushing these bad
9746 instructions fails under certain circumstances. The
9747 unconditional branches:
9748 1) Branch: b, bl, ba, bla,
9749 2) Branch Conditional: bc, bca, bcl, bcla,
9750 3) Branch Conditional to Link Register: bclr, bclrl,
9751 where (2) and (3) have BO=0x14 making them unconditional,
9752 prevent the bad prefetch because the prefetch itself is
9753 affected by these instructions. This happens even if the
9754 instruction is not executed.
9755
9756 A bctr example:
9757 .
9758 . lis 9,new_page@ha
9759 . addi 9,9,new_page@l
9760 . mtctr 9
9761 . bctr
9762 . nop
9763 . nop
9764 . new_page:
9765 .
9766 The bctr is not predicted taken due to ctr not being
9767 ready, so prefetch continues on past the bctr into the
9768 new page which might have stale instructions. If they
9769 fail to be flushed, then they will be executed after the
9770 bctr executes. Either of the following modifications
9771 prevent the bad prefetch from happening in the first
9772 place:
9773 .
9774 . lis 9,new_page@ha lis 9,new_page@ha
9775 . addi 9,9,new_page@l addi 9,9,new_page@l
9776 . mtctr 9 mtctr 9
9777 . bctr bctr
9778 . nop b somewhere_else
9779 . b somewhere_else nop
9780 . new_page: new_page:
9781 . */
9782 insn = bfd_get_32 (input_bfd, contents + offset);
9783 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9784 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9785 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9786 || ((insn & (0x3f << 26)) == (19u << 26)
9787 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9788 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9789 continue;
9790
9791 patch_addr = (start_addr + input_section->size
9792 - relax_info->workaround_size);
9793 patch_addr = (patch_addr + 15) & -16;
9794 patch_off = patch_addr - start_addr;
9795 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9796
9797 if (rel != NULL
9798 && rel->r_offset >= offset
9799 && rel->r_offset < offset + 4)
9800 {
9801 asection *sreloc;
9802
9803 /* If the insn we are patching had a reloc, adjust the
9804 reloc r_offset so that the reloc applies to the moved
9805 location. This matters for -r and --emit-relocs. */
9806 if (rel + 1 != relend)
9807 {
9808 Elf_Internal_Rela tmp = *rel;
9809
9810 /* Keep the relocs sorted by r_offset. */
9811 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9812 relend[-1] = tmp;
9813 }
9814 relend[-1].r_offset += patch_off - offset;
9815
9816 /* Adjust REL16 addends too. */
9817 switch (ELF32_R_TYPE (relend[-1].r_info))
9818 {
9819 case R_PPC_REL16:
9820 case R_PPC_REL16_LO:
9821 case R_PPC_REL16_HI:
9822 case R_PPC_REL16_HA:
9823 relend[-1].r_addend += patch_off - offset;
9824 break;
9825 default:
9826 break;
9827 }
9828
9829 /* If we are building a PIE or shared library with
9830 non-PIC objects, perhaps we had a dynamic reloc too?
9831 If so, the dynamic reloc must move with the insn. */
9832 sreloc = elf_section_data (input_section)->sreloc;
9833 if (sreloc != NULL)
9834 {
9835 Elf32_External_Rela *slo, *shi, *srelend;
9836 bfd_vma soffset;
9837
9838 slo = (Elf32_External_Rela *) sreloc->contents;
9839 shi = srelend = slo + sreloc->reloc_count;
9840 soffset = (offset + input_section->output_section->vma
9841 + input_section->output_offset);
9842 while (slo < shi)
9843 {
9844 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9845 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9846 &outrel);
9847 if (outrel.r_offset < soffset)
9848 slo = srel + 1;
9849 else if (outrel.r_offset > soffset + 3)
9850 shi = srel;
9851 else
9852 {
9853 if (srel + 1 != srelend)
9854 {
9855 memmove (srel, srel + 1,
9856 (srelend - (srel + 1)) * sizeof (*srel));
9857 srel = srelend - 1;
9858 }
9859 outrel.r_offset += patch_off - offset;
9860 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9861 (bfd_byte *) srel);
9862 break;
9863 }
9864 }
9865 }
9866 }
9867 else
9868 rel = NULL;
9869
9870 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9871 && (insn & 2) == 0 /* relative */)
9872 {
9873 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9874
9875 delta += offset - patch_off;
9876 if (bfd_link_relocatable (info) && rel != NULL)
9877 delta = 0;
9878 if (!bfd_link_relocatable (info) && rel != NULL)
9879 {
9880 enum elf_ppc_reloc_type r_type;
9881
9882 r_type = ELF32_R_TYPE (relend[-1].r_info);
9883 if (r_type == R_PPC_REL14_BRTAKEN)
9884 insn |= BRANCH_PREDICT_BIT;
9885 else if (r_type == R_PPC_REL14_BRNTAKEN)
9886 insn &= ~BRANCH_PREDICT_BIT;
9887 else
9888 BFD_ASSERT (r_type == R_PPC_REL14);
9889
9890 if ((r_type == R_PPC_REL14_BRTAKEN
9891 || r_type == R_PPC_REL14_BRNTAKEN)
9892 && delta + 0x8000 < 0x10000
9893 && (bfd_signed_vma) delta < 0)
9894 insn ^= BRANCH_PREDICT_BIT;
9895 }
9896 if (delta + 0x8000 < 0x10000)
9897 {
9898 bfd_put_32 (input_bfd,
9899 (insn & ~0xfffc) | (delta & 0xfffc),
9900 contents + patch_off);
9901 patch_off += 4;
9902 bfd_put_32 (input_bfd,
9903 B | ((offset + 4 - patch_off) & 0x3fffffc),
9904 contents + patch_off);
9905 patch_off += 4;
9906 }
9907 else
9908 {
9909 if (rel != NULL)
9910 {
9911 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9912
9913 relend[-1].r_offset += 8;
9914 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9915 }
9916 bfd_put_32 (input_bfd,
9917 (insn & ~0xfffc) | 8,
9918 contents + patch_off);
9919 patch_off += 4;
9920 bfd_put_32 (input_bfd,
9921 B | ((offset + 4 - patch_off) & 0x3fffffc),
9922 contents + patch_off);
9923 patch_off += 4;
9924 bfd_put_32 (input_bfd,
9925 B | ((delta - 8) & 0x3fffffc),
9926 contents + patch_off);
9927 patch_off += 4;
9928 }
9929 }
9930 else
9931 {
9932 bfd_put_32 (input_bfd, insn, contents + patch_off);
9933 patch_off += 4;
9934 bfd_put_32 (input_bfd,
9935 B | ((offset + 4 - patch_off) & 0x3fffffc),
9936 contents + patch_off);
9937 patch_off += 4;
9938 }
9939 BFD_ASSERT (patch_off <= input_section->size);
9940 relax_info->workaround_size = input_section->size - patch_off;
9941 }
9942 }
9943
9944 return ret;
9945 }
9946 \f
9947 /* Finish up dynamic symbol handling. We set the contents of various
9948 dynamic sections here. */
9949
9950 static bfd_boolean
9951 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9952 struct bfd_link_info *info,
9953 struct elf_link_hash_entry *h,
9954 Elf_Internal_Sym *sym)
9955 {
9956 struct ppc_elf_link_hash_table *htab;
9957 struct plt_entry *ent;
9958 bfd_boolean doneone;
9959
9960 #ifdef DEBUG
9961 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9962 h->root.root.string);
9963 #endif
9964
9965 htab = ppc_elf_hash_table (info);
9966 BFD_ASSERT (htab->elf.dynobj != NULL);
9967
9968 doneone = FALSE;
9969 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9970 if (ent->plt.offset != (bfd_vma) -1)
9971 {
9972 if (!doneone)
9973 {
9974 Elf_Internal_Rela rela;
9975 bfd_byte *loc;
9976 bfd_vma reloc_index;
9977
9978 if (htab->plt_type == PLT_NEW
9979 || !htab->elf.dynamic_sections_created
9980 || h->dynindx == -1)
9981 reloc_index = ent->plt.offset / 4;
9982 else
9983 {
9984 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9985 / htab->plt_slot_size);
9986 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9987 && htab->plt_type == PLT_OLD)
9988 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9989 }
9990
9991 /* This symbol has an entry in the procedure linkage table.
9992 Set it up. */
9993 if (htab->plt_type == PLT_VXWORKS
9994 && htab->elf.dynamic_sections_created
9995 && h->dynindx != -1)
9996 {
9997 bfd_vma got_offset;
9998 const bfd_vma *plt_entry;
9999
10000 /* The first three entries in .got.plt are reserved. */
10001 got_offset = (reloc_index + 3) * 4;
10002
10003 /* Use the right PLT. */
10004 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10005 : ppc_elf_vxworks_plt_entry;
10006
10007 /* Fill in the .plt on VxWorks. */
10008 if (bfd_link_pic (info))
10009 {
10010 bfd_put_32 (output_bfd,
10011 plt_entry[0] | PPC_HA (got_offset),
10012 htab->elf.splt->contents + ent->plt.offset + 0);
10013 bfd_put_32 (output_bfd,
10014 plt_entry[1] | PPC_LO (got_offset),
10015 htab->elf.splt->contents + ent->plt.offset + 4);
10016 }
10017 else
10018 {
10019 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10020
10021 bfd_put_32 (output_bfd,
10022 plt_entry[0] | PPC_HA (got_loc),
10023 htab->elf.splt->contents + ent->plt.offset + 0);
10024 bfd_put_32 (output_bfd,
10025 plt_entry[1] | PPC_LO (got_loc),
10026 htab->elf.splt->contents + ent->plt.offset + 4);
10027 }
10028
10029 bfd_put_32 (output_bfd, plt_entry[2],
10030 htab->elf.splt->contents + ent->plt.offset + 8);
10031 bfd_put_32 (output_bfd, plt_entry[3],
10032 htab->elf.splt->contents + ent->plt.offset + 12);
10033
10034 /* This instruction is an immediate load. The value loaded is
10035 the byte offset of the R_PPC_JMP_SLOT relocation from the
10036 start of the .rela.plt section. The value is stored in the
10037 low-order 16 bits of the load instruction. */
10038 /* NOTE: It appears that this is now an index rather than a
10039 prescaled offset. */
10040 bfd_put_32 (output_bfd,
10041 plt_entry[4] | reloc_index,
10042 htab->elf.splt->contents + ent->plt.offset + 16);
10043 /* This instruction is a PC-relative branch whose target is
10044 the start of the PLT section. The address of this branch
10045 instruction is 20 bytes beyond the start of this PLT entry.
10046 The address is encoded in bits 6-29, inclusive. The value
10047 stored is right-shifted by two bits, permitting a 26-bit
10048 offset. */
10049 bfd_put_32 (output_bfd,
10050 (plt_entry[5]
10051 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10052 htab->elf.splt->contents + ent->plt.offset + 20);
10053 bfd_put_32 (output_bfd, plt_entry[6],
10054 htab->elf.splt->contents + ent->plt.offset + 24);
10055 bfd_put_32 (output_bfd, plt_entry[7],
10056 htab->elf.splt->contents + ent->plt.offset + 28);
10057
10058 /* Fill in the GOT entry corresponding to this PLT slot with
10059 the address immediately after the "bctr" instruction
10060 in this PLT entry. */
10061 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10062 + htab->elf.splt->output_offset
10063 + ent->plt.offset + 16),
10064 htab->elf.sgotplt->contents + got_offset);
10065
10066 if (!bfd_link_pic (info))
10067 {
10068 /* Fill in a couple of entries in .rela.plt.unloaded. */
10069 loc = htab->srelplt2->contents
10070 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10071 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10072 * sizeof (Elf32_External_Rela));
10073
10074 /* Provide the @ha relocation for the first instruction. */
10075 rela.r_offset = (htab->elf.splt->output_section->vma
10076 + htab->elf.splt->output_offset
10077 + ent->plt.offset + 2);
10078 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10079 R_PPC_ADDR16_HA);
10080 rela.r_addend = got_offset;
10081 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10082 loc += sizeof (Elf32_External_Rela);
10083
10084 /* Provide the @l relocation for the second instruction. */
10085 rela.r_offset = (htab->elf.splt->output_section->vma
10086 + htab->elf.splt->output_offset
10087 + ent->plt.offset + 6);
10088 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10089 R_PPC_ADDR16_LO);
10090 rela.r_addend = got_offset;
10091 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10092 loc += sizeof (Elf32_External_Rela);
10093
10094 /* Provide a relocation for the GOT entry corresponding to this
10095 PLT slot. Point it at the middle of the .plt entry. */
10096 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10097 + htab->elf.sgotplt->output_offset
10098 + got_offset);
10099 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10100 R_PPC_ADDR32);
10101 rela.r_addend = ent->plt.offset + 16;
10102 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10103 }
10104
10105 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10106 In particular, the offset for the relocation is not the
10107 address of the PLT entry for this function, as specified
10108 by the ABI. Instead, the offset is set to the address of
10109 the GOT slot for this function. See EABI 4.4.4.1. */
10110 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10111 + htab->elf.sgotplt->output_offset
10112 + got_offset);
10113
10114 }
10115 else
10116 {
10117 asection *splt = htab->elf.splt;
10118 if (!htab->elf.dynamic_sections_created
10119 || h->dynindx == -1)
10120 splt = htab->elf.iplt;
10121
10122 rela.r_offset = (splt->output_section->vma
10123 + splt->output_offset
10124 + ent->plt.offset);
10125 if (htab->plt_type == PLT_OLD
10126 || !htab->elf.dynamic_sections_created
10127 || h->dynindx == -1)
10128 {
10129 /* We don't need to fill in the .plt. The ppc dynamic
10130 linker will fill it in. */
10131 }
10132 else
10133 {
10134 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10135 + htab->glink->output_section->vma
10136 + htab->glink->output_offset);
10137 bfd_put_32 (output_bfd, val,
10138 splt->contents + ent->plt.offset);
10139 }
10140 }
10141
10142 /* Fill in the entry in the .rela.plt section. */
10143 rela.r_addend = 0;
10144 if (!htab->elf.dynamic_sections_created
10145 || h->dynindx == -1)
10146 {
10147 BFD_ASSERT (h->type == STT_GNU_IFUNC
10148 && h->def_regular
10149 && (h->root.type == bfd_link_hash_defined
10150 || h->root.type == bfd_link_hash_defweak));
10151 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10152 rela.r_addend = SYM_VAL (h);
10153 }
10154 else
10155 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10156
10157 if (!htab->elf.dynamic_sections_created
10158 || h->dynindx == -1)
10159 {
10160 loc = (htab->elf.irelplt->contents
10161 + (htab->elf.irelplt->reloc_count++
10162 * sizeof (Elf32_External_Rela)));
10163 htab->local_ifunc_resolver = 1;
10164 }
10165 else
10166 {
10167 loc = (htab->elf.srelplt->contents
10168 + reloc_index * sizeof (Elf32_External_Rela));
10169 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10170 htab->maybe_local_ifunc_resolver = 1;
10171 }
10172 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10173
10174 if (!h->def_regular)
10175 {
10176 /* Mark the symbol as undefined, rather than as
10177 defined in the .plt section. Leave the value if
10178 there were any relocations where pointer equality
10179 matters (this is a clue for the dynamic linker, to
10180 make function pointer comparisons work between an
10181 application and shared library), otherwise set it
10182 to zero. */
10183 sym->st_shndx = SHN_UNDEF;
10184 if (!h->pointer_equality_needed)
10185 sym->st_value = 0;
10186 else if (!h->ref_regular_nonweak)
10187 {
10188 /* This breaks function pointer comparisons, but
10189 that is better than breaking tests for a NULL
10190 function pointer. */
10191 sym->st_value = 0;
10192 }
10193 }
10194 else if (h->type == STT_GNU_IFUNC
10195 && !bfd_link_pic (info))
10196 {
10197 /* Set the value of ifunc symbols in a non-pie
10198 executable to the glink entry. This is to avoid
10199 text relocations. We can't do this for ifunc in
10200 allocate_dynrelocs, as we do for normal dynamic
10201 function symbols with plt entries, because we need
10202 to keep the original value around for the ifunc
10203 relocation. */
10204 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10205 (output_bfd, htab->glink->output_section));
10206 sym->st_value = (ent->glink_offset
10207 + htab->glink->output_offset
10208 + htab->glink->output_section->vma);
10209 }
10210 doneone = TRUE;
10211 }
10212
10213 if (htab->plt_type == PLT_NEW
10214 || !htab->elf.dynamic_sections_created
10215 || h->dynindx == -1)
10216 {
10217 unsigned char *p;
10218 asection *splt = htab->elf.splt;
10219
10220 if (!htab->elf.dynamic_sections_created
10221 || h->dynindx == -1)
10222 splt = htab->elf.iplt;
10223
10224 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10225 write_glink_stub (h, ent, splt, p, info);
10226
10227 if (!bfd_link_pic (info))
10228 /* We only need one non-PIC glink stub. */
10229 break;
10230 }
10231 else
10232 break;
10233 }
10234
10235 if (h->needs_copy)
10236 {
10237 asection *s;
10238 Elf_Internal_Rela rela;
10239 bfd_byte *loc;
10240
10241 /* This symbols needs a copy reloc. Set it up. */
10242
10243 #ifdef DEBUG
10244 fprintf (stderr, ", copy");
10245 #endif
10246
10247 BFD_ASSERT (h->dynindx != -1);
10248
10249 if (ppc_elf_hash_entry (h)->has_sda_refs)
10250 s = htab->relsbss;
10251 else if (h->root.u.def.section == htab->elf.sdynrelro)
10252 s = htab->elf.sreldynrelro;
10253 else
10254 s = htab->elf.srelbss;
10255 BFD_ASSERT (s != NULL);
10256
10257 rela.r_offset = SYM_VAL (h);
10258 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10259 rela.r_addend = 0;
10260 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10261 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10262 }
10263
10264 #ifdef DEBUG
10265 fprintf (stderr, "\n");
10266 #endif
10267
10268 return TRUE;
10269 }
10270 \f
10271 static enum elf_reloc_type_class
10272 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10273 const asection *rel_sec,
10274 const Elf_Internal_Rela *rela)
10275 {
10276 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10277
10278 if (rel_sec == htab->elf.irelplt)
10279 return reloc_class_ifunc;
10280
10281 switch (ELF32_R_TYPE (rela->r_info))
10282 {
10283 case R_PPC_RELATIVE:
10284 return reloc_class_relative;
10285 case R_PPC_JMP_SLOT:
10286 return reloc_class_plt;
10287 case R_PPC_COPY:
10288 return reloc_class_copy;
10289 default:
10290 return reloc_class_normal;
10291 }
10292 }
10293 \f
10294 /* Finish up the dynamic sections. */
10295
10296 static bfd_boolean
10297 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10298 struct bfd_link_info *info)
10299 {
10300 asection *sdyn;
10301 struct ppc_elf_link_hash_table *htab;
10302 bfd_vma got;
10303 bfd *dynobj;
10304 bfd_boolean ret = TRUE;
10305
10306 #ifdef DEBUG
10307 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10308 #endif
10309
10310 htab = ppc_elf_hash_table (info);
10311 dynobj = htab->elf.dynobj;
10312 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10313
10314 got = 0;
10315 if (htab->elf.hgot != NULL)
10316 got = SYM_VAL (htab->elf.hgot);
10317
10318 if (htab->elf.dynamic_sections_created)
10319 {
10320 Elf32_External_Dyn *dyncon, *dynconend;
10321
10322 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10323
10324 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10325 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10326 for (; dyncon < dynconend; dyncon++)
10327 {
10328 Elf_Internal_Dyn dyn;
10329 asection *s;
10330
10331 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10332
10333 switch (dyn.d_tag)
10334 {
10335 case DT_PLTGOT:
10336 if (htab->is_vxworks)
10337 s = htab->elf.sgotplt;
10338 else
10339 s = htab->elf.splt;
10340 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10341 break;
10342
10343 case DT_PLTRELSZ:
10344 dyn.d_un.d_val = htab->elf.srelplt->size;
10345 break;
10346
10347 case DT_JMPREL:
10348 s = htab->elf.srelplt;
10349 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10350 break;
10351
10352 case DT_PPC_GOT:
10353 dyn.d_un.d_ptr = got;
10354 break;
10355
10356 case DT_TEXTREL:
10357 if (htab->local_ifunc_resolver)
10358 info->callbacks->einfo
10359 (_("%X%P: text relocations and GNU indirect "
10360 "functions will result in a segfault at runtime\n"));
10361 else if (htab->maybe_local_ifunc_resolver)
10362 info->callbacks->einfo
10363 (_("%P: warning: text relocations and GNU indirect "
10364 "functions may result in a segfault at runtime\n"));
10365 continue;
10366
10367 default:
10368 if (htab->is_vxworks
10369 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10370 break;
10371 continue;
10372 }
10373
10374 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10375 }
10376 }
10377
10378 if (htab->elf.sgot != NULL
10379 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
10380 {
10381 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10382 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10383 {
10384 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10385
10386 p += htab->elf.hgot->root.u.def.value;
10387 if (htab->plt_type == PLT_OLD)
10388 {
10389 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10390 so that a function can easily find the address of
10391 _GLOBAL_OFFSET_TABLE_. */
10392 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10393 < htab->elf.hgot->root.u.def.section->size);
10394 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10395 }
10396
10397 if (sdyn != NULL)
10398 {
10399 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10400 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10401 < htab->elf.hgot->root.u.def.section->size);
10402 bfd_put_32 (output_bfd, val, p);
10403 }
10404 }
10405 else
10406 {
10407 /* xgettext:c-format */
10408 _bfd_error_handler (_("%s not defined in linker created %pA"),
10409 htab->elf.hgot->root.root.string,
10410 (htab->elf.sgotplt != NULL
10411 ? htab->elf.sgotplt : htab->elf.sgot));
10412 bfd_set_error (bfd_error_bad_value);
10413 ret = FALSE;
10414 }
10415
10416 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10417 }
10418
10419 /* Fill in the first entry in the VxWorks procedure linkage table. */
10420 if (htab->is_vxworks
10421 && htab->elf.splt != NULL
10422 && htab->elf.splt->size != 0
10423 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10424 {
10425 asection *splt = htab->elf.splt;
10426 /* Use the right PLT. */
10427 const bfd_vma *plt_entry = (bfd_link_pic (info)
10428 ? ppc_elf_vxworks_pic_plt0_entry
10429 : ppc_elf_vxworks_plt0_entry);
10430
10431 if (!bfd_link_pic (info))
10432 {
10433 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10434
10435 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10436 splt->contents + 0);
10437 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10438 splt->contents + 4);
10439 }
10440 else
10441 {
10442 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10443 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10444 }
10445 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10446 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10447 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10448 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10449 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10450 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10451
10452 if (! bfd_link_pic (info))
10453 {
10454 Elf_Internal_Rela rela;
10455 bfd_byte *loc;
10456
10457 loc = htab->srelplt2->contents;
10458
10459 /* Output the @ha relocation for the first instruction. */
10460 rela.r_offset = (htab->elf.splt->output_section->vma
10461 + htab->elf.splt->output_offset
10462 + 2);
10463 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10464 rela.r_addend = 0;
10465 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10466 loc += sizeof (Elf32_External_Rela);
10467
10468 /* Output the @l relocation for the second instruction. */
10469 rela.r_offset = (htab->elf.splt->output_section->vma
10470 + htab->elf.splt->output_offset
10471 + 6);
10472 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10473 rela.r_addend = 0;
10474 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10475 loc += sizeof (Elf32_External_Rela);
10476
10477 /* Fix up the remaining relocations. They may have the wrong
10478 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10479 in which symbols were output. */
10480 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10481 {
10482 Elf_Internal_Rela rel;
10483
10484 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10485 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10486 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10487 loc += sizeof (Elf32_External_Rela);
10488
10489 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10490 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10491 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10492 loc += sizeof (Elf32_External_Rela);
10493
10494 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10495 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10496 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10497 loc += sizeof (Elf32_External_Rela);
10498 }
10499 }
10500 }
10501
10502 if (htab->glink != NULL
10503 && htab->glink->contents != NULL
10504 && htab->elf.dynamic_sections_created)
10505 {
10506 unsigned char *p;
10507 unsigned char *endp;
10508 bfd_vma res0;
10509
10510 /*
10511 * PIC glink code is the following:
10512 *
10513 * # ith PLT code stub.
10514 * addis 11,30,(plt+(i-1)*4-got)@ha
10515 * lwz 11,(plt+(i-1)*4-got)@l(11)
10516 * mtctr 11
10517 * bctr
10518 *
10519 * # A table of branches, one for each plt entry.
10520 * # The idea is that the plt call stub loads ctr and r11 with these
10521 * # addresses, so (r11 - res_0) gives the plt index * 4.
10522 * res_0: b PLTresolve
10523 * res_1: b PLTresolve
10524 * .
10525 * # Some number of entries towards the end can be nops
10526 * res_n_m3: nop
10527 * res_n_m2: nop
10528 * res_n_m1:
10529 *
10530 * PLTresolve:
10531 * addis 11,11,(1f-res_0)@ha
10532 * mflr 0
10533 * bcl 20,31,1f
10534 * 1: addi 11,11,(1b-res_0)@l
10535 * mflr 12
10536 * mtlr 0
10537 * sub 11,11,12 # r11 = index * 4
10538 * addis 12,12,(got+4-1b)@ha
10539 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10540 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10541 * mtctr 0
10542 * add 0,11,11
10543 * add 11,0,11 # r11 = index * 12 = reloc offset.
10544 * bctr
10545 *
10546 * Non-PIC glink code is a little simpler.
10547 *
10548 * # ith PLT code stub.
10549 * lis 11,(plt+(i-1)*4)@ha
10550 * lwz 11,(plt+(i-1)*4)@l(11)
10551 * mtctr 11
10552 * bctr
10553 *
10554 * The branch table is the same, then comes
10555 *
10556 * PLTresolve:
10557 * lis 12,(got+4)@ha
10558 * addis 11,11,(-res_0)@ha
10559 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10560 * addi 11,11,(-res_0)@l # r11 = index * 4
10561 * mtctr 0
10562 * add 0,11,11
10563 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10564 * add 11,0,11 # r11 = index * 12 = reloc offset.
10565 * bctr
10566 */
10567
10568 /* Build the branch table, one for each plt entry (less one),
10569 and perhaps some padding. */
10570 p = htab->glink->contents;
10571 p += htab->glink_pltresolve;
10572 endp = htab->glink->contents;
10573 endp += htab->glink->size - GLINK_PLTRESOLVE;
10574 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10575 {
10576 bfd_put_32 (output_bfd, B + endp - p, p);
10577 p += 4;
10578 }
10579 while (p < endp)
10580 {
10581 bfd_put_32 (output_bfd, NOP, p);
10582 p += 4;
10583 }
10584
10585 res0 = (htab->glink_pltresolve
10586 + htab->glink->output_section->vma
10587 + htab->glink->output_offset);
10588
10589 if (htab->params->ppc476_workaround)
10590 {
10591 /* Ensure that a call stub at the end of a page doesn't
10592 result in prefetch over the end of the page into the
10593 glink branch table. */
10594 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10595 bfd_vma page_addr;
10596 bfd_vma glink_start = (htab->glink->output_section->vma
10597 + htab->glink->output_offset);
10598
10599 for (page_addr = res0 & -pagesize;
10600 page_addr > glink_start;
10601 page_addr -= pagesize)
10602 {
10603 /* We have a plt call stub that may need fixing. */
10604 bfd_byte *loc;
10605 unsigned int insn;
10606
10607 loc = htab->glink->contents + page_addr - 4 - glink_start;
10608 insn = bfd_get_32 (output_bfd, loc);
10609 if (insn == BCTR)
10610 {
10611 /* By alignment, we know that there must be at least
10612 one other call stub before this one. */
10613 insn = bfd_get_32 (output_bfd, loc - 16);
10614 if (insn == BCTR)
10615 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10616 else
10617 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10618 }
10619 }
10620 }
10621
10622 /* Last comes the PLTresolve stub. */
10623 endp = p + GLINK_PLTRESOLVE;
10624 if (bfd_link_pic (info))
10625 {
10626 bfd_vma bcl;
10627
10628 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10629 + htab->glink->output_section->vma
10630 + htab->glink->output_offset);
10631
10632 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (bcl - res0), p);
10633 p += 4;
10634 bfd_put_32 (output_bfd, MFLR_0, p);
10635 p += 4;
10636 bfd_put_32 (output_bfd, BCL_20_31, p);
10637 p += 4;
10638 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (bcl - res0), p);
10639 p += 4;
10640 bfd_put_32 (output_bfd, MFLR_12, p);
10641 p += 4;
10642 bfd_put_32 (output_bfd, MTLR_0, p);
10643 p += 4;
10644 bfd_put_32 (output_bfd, SUB_11_11_12, p);
10645 p += 4;
10646 bfd_put_32 (output_bfd, ADDIS_12_12 + PPC_HA (got + 4 - bcl), p);
10647 p += 4;
10648 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10649 {
10650 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4 - bcl), p);
10651 p += 4;
10652 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8 - bcl), p);
10653 p += 4;
10654 }
10655 else
10656 {
10657 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4 - bcl), p);
10658 p += 4;
10659 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
10660 p += 4;
10661 }
10662 bfd_put_32 (output_bfd, MTCTR_0, p);
10663 p += 4;
10664 bfd_put_32 (output_bfd, ADD_0_11_11, p);
10665 }
10666 else
10667 {
10668 bfd_put_32 (output_bfd, LIS_12 + PPC_HA (got + 4), p);
10669 p += 4;
10670 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (-res0), p);
10671 p += 4;
10672 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10673 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4), p);
10674 else
10675 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4), p);
10676 p += 4;
10677 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (-res0), p);
10678 p += 4;
10679 bfd_put_32 (output_bfd, MTCTR_0, p);
10680 p += 4;
10681 bfd_put_32 (output_bfd, ADD_0_11_11, p);
10682 p += 4;
10683 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10684 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8), p);
10685 else
10686 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
10687 }
10688 p += 4;
10689 bfd_put_32 (output_bfd, ADD_11_0_11, p);
10690 p += 4;
10691 bfd_put_32 (output_bfd, BCTR, p);
10692 p += 4;
10693 while (p < endp)
10694 {
10695 bfd_put_32 (output_bfd,
10696 htab->params->ppc476_workaround ? BA : NOP, p);
10697 p += 4;
10698 }
10699 BFD_ASSERT (p == endp);
10700 }
10701
10702 if (htab->glink_eh_frame != NULL
10703 && htab->glink_eh_frame->contents != NULL)
10704 {
10705 unsigned char *p = htab->glink_eh_frame->contents;
10706 bfd_vma val;
10707
10708 p += sizeof (glink_eh_frame_cie);
10709 /* FDE length. */
10710 p += 4;
10711 /* CIE pointer. */
10712 p += 4;
10713 /* Offset to .glink. */
10714 val = (htab->glink->output_section->vma
10715 + htab->glink->output_offset);
10716 val -= (htab->glink_eh_frame->output_section->vma
10717 + htab->glink_eh_frame->output_offset);
10718 val -= p - htab->glink_eh_frame->contents;
10719 bfd_put_32 (htab->elf.dynobj, val, p);
10720
10721 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10722 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10723 htab->glink_eh_frame,
10724 htab->glink_eh_frame->contents))
10725 return FALSE;
10726 }
10727
10728 return ret;
10729 }
10730 \f
10731 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10732 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10733 #define TARGET_BIG_SYM powerpc_elf32_vec
10734 #define TARGET_BIG_NAME "elf32-powerpc"
10735 #define ELF_ARCH bfd_arch_powerpc
10736 #define ELF_TARGET_ID PPC32_ELF_DATA
10737 #define ELF_MACHINE_CODE EM_PPC
10738 #ifdef __QNXTARGET__
10739 #define ELF_MAXPAGESIZE 0x1000
10740 #define ELF_COMMONPAGESIZE 0x1000
10741 #else
10742 #define ELF_MAXPAGESIZE 0x10000
10743 #define ELF_COMMONPAGESIZE 0x10000
10744 #endif
10745 #define ELF_MINPAGESIZE 0x1000
10746 #define elf_info_to_howto ppc_elf_info_to_howto
10747
10748 #ifdef EM_CYGNUS_POWERPC
10749 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10750 #endif
10751
10752 #ifdef EM_PPC_OLD
10753 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10754 #endif
10755
10756 #define elf_backend_plt_not_loaded 1
10757 #define elf_backend_want_dynrelro 1
10758 #define elf_backend_can_gc_sections 1
10759 #define elf_backend_can_refcount 1
10760 #define elf_backend_rela_normal 1
10761 #define elf_backend_caches_rawsize 1
10762
10763 #define bfd_elf32_mkobject ppc_elf_mkobject
10764 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10765 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10766 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10767 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10768 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10769 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10770 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10771
10772 #define elf_backend_object_p ppc_elf_object_p
10773 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10774 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10775 #define elf_backend_relocate_section ppc_elf_relocate_section
10776 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10777 #define elf_backend_check_relocs ppc_elf_check_relocs
10778 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
10779 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10780 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10781 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10782 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10783 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10784 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10785 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10786 #define elf_backend_fake_sections ppc_elf_fake_sections
10787 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10788 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10789 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10790 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10791 #define elf_backend_write_core_note ppc_elf_write_core_note
10792 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10793 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10794 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10795 #define elf_backend_write_section ppc_elf_write_section
10796 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10797 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10798 #define elf_backend_action_discarded ppc_elf_action_discarded
10799 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10800 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10801
10802 #include "elf32-target.h"
10803
10804 /* FreeBSD Target */
10805
10806 #undef TARGET_LITTLE_SYM
10807 #undef TARGET_LITTLE_NAME
10808
10809 #undef TARGET_BIG_SYM
10810 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10811 #undef TARGET_BIG_NAME
10812 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10813
10814 #undef ELF_OSABI
10815 #define ELF_OSABI ELFOSABI_FREEBSD
10816
10817 #undef elf32_bed
10818 #define elf32_bed elf32_powerpc_fbsd_bed
10819
10820 #include "elf32-target.h"
10821
10822 /* VxWorks Target */
10823
10824 #undef TARGET_LITTLE_SYM
10825 #undef TARGET_LITTLE_NAME
10826
10827 #undef TARGET_BIG_SYM
10828 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10829 #undef TARGET_BIG_NAME
10830 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10831
10832 #undef ELF_OSABI
10833
10834 /* VxWorks uses the elf default section flags for .plt. */
10835 static const struct bfd_elf_special_section *
10836 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
10837 {
10838 if (sec->name == NULL)
10839 return NULL;
10840
10841 if (strcmp (sec->name, ".plt") == 0)
10842 return _bfd_elf_get_sec_type_attr (abfd, sec);
10843
10844 return ppc_elf_get_sec_type_attr (abfd, sec);
10845 }
10846
10847 /* Like ppc_elf_link_hash_table_create, but overrides
10848 appropriately for VxWorks. */
10849 static struct bfd_link_hash_table *
10850 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10851 {
10852 struct bfd_link_hash_table *ret;
10853
10854 ret = ppc_elf_link_hash_table_create (abfd);
10855 if (ret)
10856 {
10857 struct ppc_elf_link_hash_table *htab
10858 = (struct ppc_elf_link_hash_table *)ret;
10859 htab->is_vxworks = 1;
10860 htab->plt_type = PLT_VXWORKS;
10861 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10862 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10863 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10864 }
10865 return ret;
10866 }
10867
10868 /* Tweak magic VxWorks symbols as they are loaded. */
10869 static bfd_boolean
10870 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10871 struct bfd_link_info *info,
10872 Elf_Internal_Sym *sym,
10873 const char **namep,
10874 flagword *flagsp,
10875 asection **secp,
10876 bfd_vma *valp)
10877 {
10878 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
10879 valp))
10880 return FALSE;
10881
10882 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
10883 }
10884
10885 static void
10886 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10887 {
10888 ppc_elf_final_write_processing (abfd, linker);
10889 elf_vxworks_final_write_processing (abfd, linker);
10890 }
10891
10892 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10893 define it. */
10894 #undef elf_backend_want_plt_sym
10895 #define elf_backend_want_plt_sym 1
10896 #undef elf_backend_want_got_plt
10897 #define elf_backend_want_got_plt 1
10898 #undef elf_backend_got_symbol_offset
10899 #define elf_backend_got_symbol_offset 0
10900 #undef elf_backend_plt_not_loaded
10901 #define elf_backend_plt_not_loaded 0
10902 #undef elf_backend_plt_readonly
10903 #define elf_backend_plt_readonly 1
10904 #undef elf_backend_got_header_size
10905 #define elf_backend_got_header_size 12
10906 #undef elf_backend_dtrel_excludes_plt
10907 #define elf_backend_dtrel_excludes_plt 1
10908
10909 #undef bfd_elf32_get_synthetic_symtab
10910
10911 #undef bfd_elf32_bfd_link_hash_table_create
10912 #define bfd_elf32_bfd_link_hash_table_create \
10913 ppc_elf_vxworks_link_hash_table_create
10914 #undef elf_backend_add_symbol_hook
10915 #define elf_backend_add_symbol_hook \
10916 ppc_elf_vxworks_add_symbol_hook
10917 #undef elf_backend_link_output_symbol_hook
10918 #define elf_backend_link_output_symbol_hook \
10919 elf_vxworks_link_output_symbol_hook
10920 #undef elf_backend_final_write_processing
10921 #define elf_backend_final_write_processing \
10922 ppc_elf_vxworks_final_write_processing
10923 #undef elf_backend_get_sec_type_attr
10924 #define elf_backend_get_sec_type_attr \
10925 ppc_elf_vxworks_get_sec_type_attr
10926 #undef elf_backend_emit_relocs
10927 #define elf_backend_emit_relocs \
10928 elf_vxworks_emit_relocs
10929
10930 #undef elf32_bed
10931 #define elf32_bed ppc_elf_vxworks_bed
10932 #undef elf_backend_post_process_headers
10933
10934 #include "elf32-target.h"
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