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[deliverable/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 /* Marker relocs on inline plt call instructions. */
822 HOWTO (R_PPC_PLTSEQ,
823 0, /* rightshift */
824 2, /* size (0 = byte, 1 = short, 2 = long) */
825 32, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 bfd_elf_generic_reloc, /* special_function */
830 "R_PPC_PLTSEQ", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 HOWTO (R_PPC_PLTCALL,
837 0, /* rightshift */
838 2, /* size (0 = byte, 1 = short, 2 = long) */
839 32, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 bfd_elf_generic_reloc, /* special_function */
844 "R_PPC_PLTCALL", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Computes the load module index of the load module that contains the
851 definition of its TLS sym. */
852 HOWTO (R_PPC_DTPMOD32,
853 0, /* rightshift */
854 2, /* size (0 = byte, 1 = short, 2 = long) */
855 32, /* bitsize */
856 FALSE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 ppc_elf_unhandled_reloc, /* special_function */
860 "R_PPC_DTPMOD32", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 0xffffffff, /* dst_mask */
864 FALSE), /* pcrel_offset */
865
866 /* Computes a dtv-relative displacement, the difference between the value
867 of sym+add and the base address of the thread-local storage block that
868 contains the definition of sym, minus 0x8000. */
869 HOWTO (R_PPC_DTPREL32,
870 0, /* rightshift */
871 2, /* size (0 = byte, 1 = short, 2 = long) */
872 32, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 ppc_elf_unhandled_reloc, /* special_function */
877 "R_PPC_DTPREL32", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 0xffffffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* A 16 bit dtprel reloc. */
884 HOWTO (R_PPC_DTPREL16,
885 0, /* rightshift */
886 1, /* size (0 = byte, 1 = short, 2 = long) */
887 16, /* bitsize */
888 FALSE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_signed, /* complain_on_overflow */
891 ppc_elf_unhandled_reloc, /* special_function */
892 "R_PPC_DTPREL16", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 0xffff, /* dst_mask */
896 FALSE), /* pcrel_offset */
897
898 /* Like DTPREL16, but no overflow. */
899 HOWTO (R_PPC_DTPREL16_LO,
900 0, /* rightshift */
901 1, /* size (0 = byte, 1 = short, 2 = long) */
902 16, /* bitsize */
903 FALSE, /* pc_relative */
904 0, /* bitpos */
905 complain_overflow_dont, /* complain_on_overflow */
906 ppc_elf_unhandled_reloc, /* special_function */
907 "R_PPC_DTPREL16_LO", /* name */
908 FALSE, /* partial_inplace */
909 0, /* src_mask */
910 0xffff, /* dst_mask */
911 FALSE), /* pcrel_offset */
912
913 /* Like DTPREL16_LO, but next higher group of 16 bits. */
914 HOWTO (R_PPC_DTPREL16_HI,
915 16, /* rightshift */
916 1, /* size (0 = byte, 1 = short, 2 = long) */
917 16, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_dont, /* complain_on_overflow */
921 ppc_elf_unhandled_reloc, /* special_function */
922 "R_PPC_DTPREL16_HI", /* name */
923 FALSE, /* partial_inplace */
924 0, /* src_mask */
925 0xffff, /* dst_mask */
926 FALSE), /* pcrel_offset */
927
928 /* Like DTPREL16_HI, but adjust for low 16 bits. */
929 HOWTO (R_PPC_DTPREL16_HA,
930 16, /* rightshift */
931 1, /* size (0 = byte, 1 = short, 2 = long) */
932 16, /* bitsize */
933 FALSE, /* pc_relative */
934 0, /* bitpos */
935 complain_overflow_dont, /* complain_on_overflow */
936 ppc_elf_unhandled_reloc, /* special_function */
937 "R_PPC_DTPREL16_HA", /* name */
938 FALSE, /* partial_inplace */
939 0, /* src_mask */
940 0xffff, /* dst_mask */
941 FALSE), /* pcrel_offset */
942
943 /* Computes a tp-relative displacement, the difference between the value of
944 sym+add and the value of the thread pointer (r13). */
945 HOWTO (R_PPC_TPREL32,
946 0, /* rightshift */
947 2, /* size (0 = byte, 1 = short, 2 = long) */
948 32, /* bitsize */
949 FALSE, /* pc_relative */
950 0, /* bitpos */
951 complain_overflow_dont, /* complain_on_overflow */
952 ppc_elf_unhandled_reloc, /* special_function */
953 "R_PPC_TPREL32", /* name */
954 FALSE, /* partial_inplace */
955 0, /* src_mask */
956 0xffffffff, /* dst_mask */
957 FALSE), /* pcrel_offset */
958
959 /* A 16 bit tprel reloc. */
960 HOWTO (R_PPC_TPREL16,
961 0, /* rightshift */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
963 16, /* bitsize */
964 FALSE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_signed, /* complain_on_overflow */
967 ppc_elf_unhandled_reloc, /* special_function */
968 "R_PPC_TPREL16", /* name */
969 FALSE, /* partial_inplace */
970 0, /* src_mask */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
973
974 /* Like TPREL16, but no overflow. */
975 HOWTO (R_PPC_TPREL16_LO,
976 0, /* rightshift */
977 1, /* size (0 = byte, 1 = short, 2 = long) */
978 16, /* bitsize */
979 FALSE, /* pc_relative */
980 0, /* bitpos */
981 complain_overflow_dont, /* complain_on_overflow */
982 ppc_elf_unhandled_reloc, /* special_function */
983 "R_PPC_TPREL16_LO", /* name */
984 FALSE, /* partial_inplace */
985 0, /* src_mask */
986 0xffff, /* dst_mask */
987 FALSE), /* pcrel_offset */
988
989 /* Like TPREL16_LO, but next higher group of 16 bits. */
990 HOWTO (R_PPC_TPREL16_HI,
991 16, /* rightshift */
992 1, /* size (0 = byte, 1 = short, 2 = long) */
993 16, /* bitsize */
994 FALSE, /* pc_relative */
995 0, /* bitpos */
996 complain_overflow_dont, /* complain_on_overflow */
997 ppc_elf_unhandled_reloc, /* special_function */
998 "R_PPC_TPREL16_HI", /* name */
999 FALSE, /* partial_inplace */
1000 0, /* src_mask */
1001 0xffff, /* dst_mask */
1002 FALSE), /* pcrel_offset */
1003
1004 /* Like TPREL16_HI, but adjust for low 16 bits. */
1005 HOWTO (R_PPC_TPREL16_HA,
1006 16, /* rightshift */
1007 1, /* size (0 = byte, 1 = short, 2 = long) */
1008 16, /* bitsize */
1009 FALSE, /* pc_relative */
1010 0, /* bitpos */
1011 complain_overflow_dont, /* complain_on_overflow */
1012 ppc_elf_unhandled_reloc, /* special_function */
1013 "R_PPC_TPREL16_HA", /* name */
1014 FALSE, /* partial_inplace */
1015 0, /* src_mask */
1016 0xffff, /* dst_mask */
1017 FALSE), /* pcrel_offset */
1018
1019 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1020 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1021 to the first entry. */
1022 HOWTO (R_PPC_GOT_TLSGD16,
1023 0, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc_elf_unhandled_reloc, /* special_function */
1030 "R_PPC_GOT_TLSGD16", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* Like GOT_TLSGD16, but no overflow. */
1037 HOWTO (R_PPC_GOT_TLSGD16_LO,
1038 0, /* rightshift */
1039 1, /* size (0 = byte, 1 = short, 2 = long) */
1040 16, /* bitsize */
1041 FALSE, /* pc_relative */
1042 0, /* bitpos */
1043 complain_overflow_dont, /* complain_on_overflow */
1044 ppc_elf_unhandled_reloc, /* special_function */
1045 "R_PPC_GOT_TLSGD16_LO", /* name */
1046 FALSE, /* partial_inplace */
1047 0, /* src_mask */
1048 0xffff, /* dst_mask */
1049 FALSE), /* pcrel_offset */
1050
1051 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1052 HOWTO (R_PPC_GOT_TLSGD16_HI,
1053 16, /* rightshift */
1054 1, /* size (0 = byte, 1 = short, 2 = long) */
1055 16, /* bitsize */
1056 FALSE, /* pc_relative */
1057 0, /* bitpos */
1058 complain_overflow_dont, /* complain_on_overflow */
1059 ppc_elf_unhandled_reloc, /* special_function */
1060 "R_PPC_GOT_TLSGD16_HI", /* name */
1061 FALSE, /* partial_inplace */
1062 0, /* src_mask */
1063 0xffff, /* dst_mask */
1064 FALSE), /* pcrel_offset */
1065
1066 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1067 HOWTO (R_PPC_GOT_TLSGD16_HA,
1068 16, /* rightshift */
1069 1, /* size (0 = byte, 1 = short, 2 = long) */
1070 16, /* bitsize */
1071 FALSE, /* pc_relative */
1072 0, /* bitpos */
1073 complain_overflow_dont, /* complain_on_overflow */
1074 ppc_elf_unhandled_reloc, /* special_function */
1075 "R_PPC_GOT_TLSGD16_HA", /* name */
1076 FALSE, /* partial_inplace */
1077 0, /* src_mask */
1078 0xffff, /* dst_mask */
1079 FALSE), /* pcrel_offset */
1080
1081 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1082 with values (sym+add)@dtpmod and zero, and computes the offset to the
1083 first entry. */
1084 HOWTO (R_PPC_GOT_TLSLD16,
1085 0, /* rightshift */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1087 16, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_signed, /* complain_on_overflow */
1091 ppc_elf_unhandled_reloc, /* special_function */
1092 "R_PPC_GOT_TLSLD16", /* name */
1093 FALSE, /* partial_inplace */
1094 0, /* src_mask */
1095 0xffff, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 /* Like GOT_TLSLD16, but no overflow. */
1099 HOWTO (R_PPC_GOT_TLSLD16_LO,
1100 0, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 16, /* bitsize */
1103 FALSE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_dont, /* complain_on_overflow */
1106 ppc_elf_unhandled_reloc, /* special_function */
1107 "R_PPC_GOT_TLSLD16_LO", /* name */
1108 FALSE, /* partial_inplace */
1109 0, /* src_mask */
1110 0xffff, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1112
1113 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1114 HOWTO (R_PPC_GOT_TLSLD16_HI,
1115 16, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_dont, /* complain_on_overflow */
1121 ppc_elf_unhandled_reloc, /* special_function */
1122 "R_PPC_GOT_TLSLD16_HI", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xffff, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1129 HOWTO (R_PPC_GOT_TLSLD16_HA,
1130 16, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc_elf_unhandled_reloc, /* special_function */
1137 "R_PPC_GOT_TLSLD16_HA", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xffff, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1144 the offset to the entry. */
1145 HOWTO (R_PPC_GOT_DTPREL16,
1146 0, /* rightshift */
1147 1, /* size (0 = byte, 1 = short, 2 = long) */
1148 16, /* bitsize */
1149 FALSE, /* pc_relative */
1150 0, /* bitpos */
1151 complain_overflow_signed, /* complain_on_overflow */
1152 ppc_elf_unhandled_reloc, /* special_function */
1153 "R_PPC_GOT_DTPREL16", /* name */
1154 FALSE, /* partial_inplace */
1155 0, /* src_mask */
1156 0xffff, /* dst_mask */
1157 FALSE), /* pcrel_offset */
1158
1159 /* Like GOT_DTPREL16, but no overflow. */
1160 HOWTO (R_PPC_GOT_DTPREL16_LO,
1161 0, /* rightshift */
1162 1, /* size (0 = byte, 1 = short, 2 = long) */
1163 16, /* bitsize */
1164 FALSE, /* pc_relative */
1165 0, /* bitpos */
1166 complain_overflow_dont, /* complain_on_overflow */
1167 ppc_elf_unhandled_reloc, /* special_function */
1168 "R_PPC_GOT_DTPREL16_LO", /* name */
1169 FALSE, /* partial_inplace */
1170 0, /* src_mask */
1171 0xffff, /* dst_mask */
1172 FALSE), /* pcrel_offset */
1173
1174 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1175 HOWTO (R_PPC_GOT_DTPREL16_HI,
1176 16, /* rightshift */
1177 1, /* size (0 = byte, 1 = short, 2 = long) */
1178 16, /* bitsize */
1179 FALSE, /* pc_relative */
1180 0, /* bitpos */
1181 complain_overflow_dont, /* complain_on_overflow */
1182 ppc_elf_unhandled_reloc, /* special_function */
1183 "R_PPC_GOT_DTPREL16_HI", /* name */
1184 FALSE, /* partial_inplace */
1185 0, /* src_mask */
1186 0xffff, /* dst_mask */
1187 FALSE), /* pcrel_offset */
1188
1189 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1190 HOWTO (R_PPC_GOT_DTPREL16_HA,
1191 16, /* rightshift */
1192 1, /* size (0 = byte, 1 = short, 2 = long) */
1193 16, /* bitsize */
1194 FALSE, /* pc_relative */
1195 0, /* bitpos */
1196 complain_overflow_dont, /* complain_on_overflow */
1197 ppc_elf_unhandled_reloc, /* special_function */
1198 "R_PPC_GOT_DTPREL16_HA", /* name */
1199 FALSE, /* partial_inplace */
1200 0, /* src_mask */
1201 0xffff, /* dst_mask */
1202 FALSE), /* pcrel_offset */
1203
1204 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1205 offset to the entry. */
1206 HOWTO (R_PPC_GOT_TPREL16,
1207 0, /* rightshift */
1208 1, /* size (0 = byte, 1 = short, 2 = long) */
1209 16, /* bitsize */
1210 FALSE, /* pc_relative */
1211 0, /* bitpos */
1212 complain_overflow_signed, /* complain_on_overflow */
1213 ppc_elf_unhandled_reloc, /* special_function */
1214 "R_PPC_GOT_TPREL16", /* name */
1215 FALSE, /* partial_inplace */
1216 0, /* src_mask */
1217 0xffff, /* dst_mask */
1218 FALSE), /* pcrel_offset */
1219
1220 /* Like GOT_TPREL16, but no overflow. */
1221 HOWTO (R_PPC_GOT_TPREL16_LO,
1222 0, /* rightshift */
1223 1, /* size (0 = byte, 1 = short, 2 = long) */
1224 16, /* bitsize */
1225 FALSE, /* pc_relative */
1226 0, /* bitpos */
1227 complain_overflow_dont, /* complain_on_overflow */
1228 ppc_elf_unhandled_reloc, /* special_function */
1229 "R_PPC_GOT_TPREL16_LO", /* name */
1230 FALSE, /* partial_inplace */
1231 0, /* src_mask */
1232 0xffff, /* dst_mask */
1233 FALSE), /* pcrel_offset */
1234
1235 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1236 HOWTO (R_PPC_GOT_TPREL16_HI,
1237 16, /* rightshift */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1239 16, /* bitsize */
1240 FALSE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_dont, /* complain_on_overflow */
1243 ppc_elf_unhandled_reloc, /* special_function */
1244 "R_PPC_GOT_TPREL16_HI", /* name */
1245 FALSE, /* partial_inplace */
1246 0, /* src_mask */
1247 0xffff, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1249
1250 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1251 HOWTO (R_PPC_GOT_TPREL16_HA,
1252 16, /* rightshift */
1253 1, /* size (0 = byte, 1 = short, 2 = long) */
1254 16, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 ppc_elf_unhandled_reloc, /* special_function */
1259 "R_PPC_GOT_TPREL16_HA", /* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0xffff, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 /* The remaining relocs are from the Embedded ELF ABI, and are not
1266 in the SVR4 ELF ABI. */
1267
1268 /* 32 bit value resulting from the addend minus the symbol. */
1269 HOWTO (R_PPC_EMB_NADDR32, /* type */
1270 0, /* rightshift */
1271 2, /* size (0 = byte, 1 = short, 2 = long) */
1272 32, /* bitsize */
1273 FALSE, /* pc_relative */
1274 0, /* bitpos */
1275 complain_overflow_dont, /* complain_on_overflow */
1276 ppc_elf_unhandled_reloc, /* special_function */
1277 "R_PPC_EMB_NADDR32", /* name */
1278 FALSE, /* partial_inplace */
1279 0, /* src_mask */
1280 0xffffffff, /* dst_mask */
1281 FALSE), /* pcrel_offset */
1282
1283 /* 16 bit value resulting from the addend minus the symbol. */
1284 HOWTO (R_PPC_EMB_NADDR16, /* type */
1285 0, /* rightshift */
1286 1, /* size (0 = byte, 1 = short, 2 = long) */
1287 16, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_signed, /* complain_on_overflow */
1291 ppc_elf_unhandled_reloc, /* special_function */
1292 "R_PPC_EMB_NADDR16", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 0xffff, /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* 16 bit value resulting from the addend minus the symbol. */
1299 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1300 0, /* rightshift */
1301 1, /* size (0 = byte, 1 = short, 2 = long) */
1302 16, /* bitsize */
1303 FALSE, /* pc_relative */
1304 0, /* bitpos */
1305 complain_overflow_dont,/* complain_on_overflow */
1306 ppc_elf_unhandled_reloc, /* special_function */
1307 "R_PPC_EMB_ADDR16_LO", /* name */
1308 FALSE, /* partial_inplace */
1309 0, /* src_mask */
1310 0xffff, /* dst_mask */
1311 FALSE), /* pcrel_offset */
1312
1313 /* The high order 16 bits of the addend minus the symbol. */
1314 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1315 16, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_dont, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_NADDR16_HI", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* The high order 16 bits of the result of the addend minus the address,
1329 plus 1 if the contents of the low 16 bits, treated as a signed number,
1330 is negative. */
1331 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1332 16, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_NADDR16_HA", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* 16 bit value resulting from allocating a 4 byte word to hold an
1346 address in the .sdata section, and returning the offset from
1347 _SDA_BASE_ for that relocation. */
1348 HOWTO (R_PPC_EMB_SDAI16, /* type */
1349 0, /* rightshift */
1350 1, /* size (0 = byte, 1 = short, 2 = long) */
1351 16, /* bitsize */
1352 FALSE, /* pc_relative */
1353 0, /* bitpos */
1354 complain_overflow_signed, /* complain_on_overflow */
1355 ppc_elf_unhandled_reloc, /* special_function */
1356 "R_PPC_EMB_SDAI16", /* name */
1357 FALSE, /* partial_inplace */
1358 0, /* src_mask */
1359 0xffff, /* dst_mask */
1360 FALSE), /* pcrel_offset */
1361
1362 /* 16 bit value resulting from allocating a 4 byte word to hold an
1363 address in the .sdata2 section, and returning the offset from
1364 _SDA2_BASE_ for that relocation. */
1365 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 FALSE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_signed, /* complain_on_overflow */
1372 ppc_elf_unhandled_reloc, /* special_function */
1373 "R_PPC_EMB_SDA2I16", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 FALSE), /* pcrel_offset */
1378
1379 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1380 small data items. */
1381 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1382 0, /* rightshift */
1383 1, /* size (0 = byte, 1 = short, 2 = long) */
1384 16, /* bitsize */
1385 FALSE, /* pc_relative */
1386 0, /* bitpos */
1387 complain_overflow_signed, /* complain_on_overflow */
1388 ppc_elf_unhandled_reloc, /* special_function */
1389 "R_PPC_EMB_SDA2REL", /* name */
1390 FALSE, /* partial_inplace */
1391 0, /* src_mask */
1392 0xffff, /* dst_mask */
1393 FALSE), /* pcrel_offset */
1394
1395 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1396 signed offset from the appropriate base, and filling in the register
1397 field with the appropriate register (0, 2, or 13). */
1398 HOWTO (R_PPC_EMB_SDA21, /* type */
1399 0, /* rightshift */
1400 2, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 FALSE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_signed, /* complain_on_overflow */
1405 ppc_elf_unhandled_reloc, /* special_function */
1406 "R_PPC_EMB_SDA21", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 FALSE), /* pcrel_offset */
1411
1412 /* Relocation not handled: R_PPC_EMB_MRKREF */
1413 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1414 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1415 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1416 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1417 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1418
1419 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1420 in the 16 bit signed offset from the appropriate base, and filling in the
1421 register field with the appropriate register (0, 2, or 13). */
1422 HOWTO (R_PPC_EMB_RELSDA, /* type */
1423 0, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_signed, /* complain_on_overflow */
1429 ppc_elf_unhandled_reloc, /* special_function */
1430 "R_PPC_EMB_RELSDA", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xffff, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* A relative 8 bit branch. */
1437 HOWTO (R_PPC_VLE_REL8, /* type */
1438 1, /* rightshift */
1439 1, /* size (0 = byte, 1 = short, 2 = long) */
1440 8, /* bitsize */
1441 TRUE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_signed, /* complain_on_overflow */
1444 bfd_elf_generic_reloc, /* special_function */
1445 "R_PPC_VLE_REL8", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 0xff, /* dst_mask */
1449 TRUE), /* pcrel_offset */
1450
1451 /* A relative 15 bit branch. */
1452 HOWTO (R_PPC_VLE_REL15, /* type */
1453 1, /* rightshift */
1454 2, /* size (0 = byte, 1 = short, 2 = long) */
1455 15, /* bitsize */
1456 TRUE, /* pc_relative */
1457 1, /* bitpos */
1458 complain_overflow_signed, /* complain_on_overflow */
1459 bfd_elf_generic_reloc, /* special_function */
1460 "R_PPC_VLE_REL15", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xfffe, /* dst_mask */
1464 TRUE), /* pcrel_offset */
1465
1466 /* A relative 24 bit branch. */
1467 HOWTO (R_PPC_VLE_REL24, /* type */
1468 1, /* rightshift */
1469 2, /* size (0 = byte, 1 = short, 2 = long) */
1470 24, /* bitsize */
1471 TRUE, /* pc_relative */
1472 1, /* bitpos */
1473 complain_overflow_signed, /* complain_on_overflow */
1474 bfd_elf_generic_reloc, /* special_function */
1475 "R_PPC_VLE_REL24", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 0x1fffffe, /* dst_mask */
1479 TRUE), /* pcrel_offset */
1480
1481 /* The 16 LSBS in split16a format. */
1482 HOWTO (R_PPC_VLE_LO16A, /* type */
1483 0, /* rightshift */
1484 2, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_dont, /* complain_on_overflow */
1489 ppc_elf_unhandled_reloc, /* special_function */
1490 "R_PPC_VLE_LO16A", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0x1f07ff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* The 16 LSBS in split16d format. */
1497 HOWTO (R_PPC_VLE_LO16D, /* type */
1498 0, /* rightshift */
1499 2, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc_elf_unhandled_reloc, /* special_function */
1505 "R_PPC_VLE_LO16D", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0x3e007ff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Bits 16-31 split16a format. */
1512 HOWTO (R_PPC_VLE_HI16A, /* type */
1513 16, /* rightshift */
1514 2, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc_elf_unhandled_reloc, /* special_function */
1520 "R_PPC_VLE_HI16A", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0x1f07ff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Bits 16-31 split16d format. */
1527 HOWTO (R_PPC_VLE_HI16D, /* type */
1528 16, /* rightshift */
1529 2, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc_elf_unhandled_reloc, /* special_function */
1535 "R_PPC_VLE_HI16D", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0x3e007ff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Bits 16-31 (High Adjusted) in split16a format. */
1542 HOWTO (R_PPC_VLE_HA16A, /* type */
1543 16, /* rightshift */
1544 2, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc_elf_unhandled_reloc, /* special_function */
1550 "R_PPC_VLE_HA16A", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0x1f07ff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Bits 16-31 (High Adjusted) in split16d format. */
1557 HOWTO (R_PPC_VLE_HA16D, /* type */
1558 16, /* rightshift */
1559 2, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc_elf_unhandled_reloc, /* special_function */
1565 "R_PPC_VLE_HA16D", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0x3e007ff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1572 instructions. If the register base is 0 then the linker changes
1573 the e_add16i to an e_li instruction. */
1574 HOWTO (R_PPC_VLE_SDA21, /* type */
1575 0, /* rightshift */
1576 2, /* size (0 = byte, 1 = short, 2 = long) */
1577 16, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_signed, /* complain_on_overflow */
1581 ppc_elf_unhandled_reloc, /* special_function */
1582 "R_PPC_VLE_SDA21", /* name */
1583 FALSE, /* partial_inplace */
1584 0, /* src_mask */
1585 0xffff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1589 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1590 0, /* rightshift */
1591 2, /* size (0 = byte, 1 = short, 2 = long) */
1592 16, /* bitsize */
1593 FALSE, /* pc_relative */
1594 0, /* bitpos */
1595 complain_overflow_dont, /* complain_on_overflow */
1596 ppc_elf_unhandled_reloc, /* special_function */
1597 "R_PPC_VLE_SDA21_LO", /* name */
1598 FALSE, /* partial_inplace */
1599 0, /* src_mask */
1600 0xffff, /* dst_mask */
1601 FALSE), /* pcrel_offset */
1602
1603 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1604 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1605 0, /* rightshift */
1606 2, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_dont, /* complain_on_overflow */
1611 ppc_elf_unhandled_reloc, /* special_function */
1612 "R_PPC_VLE_SDAREL_LO16A", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0x1f07ff, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1619 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1620 0, /* rightshift */
1621 2, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_dont, /* complain_on_overflow */
1626 ppc_elf_unhandled_reloc, /* special_function */
1627 "R_PPC_VLE_SDAREL_LO16D", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0x3e007ff, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1634 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1635 16, /* rightshift */
1636 2, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_dont, /* complain_on_overflow */
1641 ppc_elf_unhandled_reloc, /* special_function */
1642 "R_PPC_VLE_SDAREL_HI16A", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0x1f07ff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1649 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1650 16, /* rightshift */
1651 2, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc_elf_unhandled_reloc, /* special_function */
1657 "R_PPC_VLE_SDAREL_HI16D", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0x3e007ff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1664 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1665 16, /* rightshift */
1666 2, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc_elf_unhandled_reloc, /* special_function */
1672 "R_PPC_VLE_SDAREL_HA16A", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0x1f07ff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1679 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1680 16, /* rightshift */
1681 2, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc_elf_unhandled_reloc, /* special_function */
1687 "R_PPC_VLE_SDAREL_HA16D", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0x3e007ff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* e_li split20 format. */
1694 HOWTO (R_PPC_VLE_ADDR20, /* type */
1695 16, /* rightshift */
1696 2, /* size (0 = byte, 1 = short, 2 = long) */
1697 20, /* bitsize */
1698 FALSE, /* pc_relative */
1699 0, /* bitpos */
1700 complain_overflow_dont, /* complain_on_overflow */
1701 bfd_elf_generic_reloc, /* special_function */
1702 "R_PPC_VLE_ADDR20", /* name */
1703 FALSE, /* partial_inplace */
1704 0, /* src_mask */
1705 0x1f07ff, /* dst_mask */
1706 FALSE), /* pcrel_offset */
1707
1708 HOWTO (R_PPC_IRELATIVE, /* type */
1709 0, /* rightshift */
1710 2, /* size (0 = byte, 1 = short, 2 = long) */
1711 32, /* bitsize */
1712 FALSE, /* pc_relative */
1713 0, /* bitpos */
1714 complain_overflow_dont, /* complain_on_overflow */
1715 ppc_elf_unhandled_reloc, /* special_function */
1716 "R_PPC_IRELATIVE", /* name */
1717 FALSE, /* partial_inplace */
1718 0, /* src_mask */
1719 0xffffffff, /* dst_mask */
1720 FALSE), /* pcrel_offset */
1721
1722 /* A 16 bit relative relocation. */
1723 HOWTO (R_PPC_REL16, /* type */
1724 0, /* rightshift */
1725 1, /* size (0 = byte, 1 = short, 2 = long) */
1726 16, /* bitsize */
1727 TRUE, /* pc_relative */
1728 0, /* bitpos */
1729 complain_overflow_signed, /* complain_on_overflow */
1730 bfd_elf_generic_reloc, /* special_function */
1731 "R_PPC_REL16", /* name */
1732 FALSE, /* partial_inplace */
1733 0, /* src_mask */
1734 0xffff, /* dst_mask */
1735 TRUE), /* pcrel_offset */
1736
1737 /* A 16 bit relative relocation without overflow. */
1738 HOWTO (R_PPC_REL16_LO, /* type */
1739 0, /* rightshift */
1740 1, /* size (0 = byte, 1 = short, 2 = long) */
1741 16, /* bitsize */
1742 TRUE, /* pc_relative */
1743 0, /* bitpos */
1744 complain_overflow_dont,/* complain_on_overflow */
1745 bfd_elf_generic_reloc, /* special_function */
1746 "R_PPC_REL16_LO", /* name */
1747 FALSE, /* partial_inplace */
1748 0, /* src_mask */
1749 0xffff, /* dst_mask */
1750 TRUE), /* pcrel_offset */
1751
1752 /* The high order 16 bits of a relative address. */
1753 HOWTO (R_PPC_REL16_HI, /* type */
1754 16, /* rightshift */
1755 1, /* size (0 = byte, 1 = short, 2 = long) */
1756 16, /* bitsize */
1757 TRUE, /* pc_relative */
1758 0, /* bitpos */
1759 complain_overflow_dont, /* complain_on_overflow */
1760 bfd_elf_generic_reloc, /* special_function */
1761 "R_PPC_REL16_HI", /* name */
1762 FALSE, /* partial_inplace */
1763 0, /* src_mask */
1764 0xffff, /* dst_mask */
1765 TRUE), /* pcrel_offset */
1766
1767 /* The high order 16 bits of a relative address, plus 1 if the contents of
1768 the low 16 bits, treated as a signed number, is negative. */
1769 HOWTO (R_PPC_REL16_HA, /* type */
1770 16, /* rightshift */
1771 1, /* size (0 = byte, 1 = short, 2 = long) */
1772 16, /* bitsize */
1773 TRUE, /* pc_relative */
1774 0, /* bitpos */
1775 complain_overflow_dont, /* complain_on_overflow */
1776 ppc_elf_addr16_ha_reloc, /* special_function */
1777 "R_PPC_REL16_HA", /* name */
1778 FALSE, /* partial_inplace */
1779 0, /* src_mask */
1780 0xffff, /* dst_mask */
1781 TRUE), /* pcrel_offset */
1782
1783 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1784 HOWTO (R_PPC_REL16DX_HA, /* type */
1785 16, /* rightshift */
1786 2, /* size (0 = byte, 1 = short, 2 = long) */
1787 16, /* bitsize */
1788 TRUE, /* pc_relative */
1789 0, /* bitpos */
1790 complain_overflow_signed, /* complain_on_overflow */
1791 ppc_elf_addr16_ha_reloc, /* special_function */
1792 "R_PPC_REL16DX_HA", /* name */
1793 FALSE, /* partial_inplace */
1794 0, /* src_mask */
1795 0x1fffc1, /* dst_mask */
1796 TRUE), /* pcrel_offset */
1797
1798 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1799 HOWTO (R_PPC_16DX_HA, /* type */
1800 16, /* rightshift */
1801 2, /* size (0 = byte, 1 = short, 2 = long) */
1802 16, /* bitsize */
1803 FALSE, /* pc_relative */
1804 0, /* bitpos */
1805 complain_overflow_signed, /* complain_on_overflow */
1806 ppc_elf_addr16_ha_reloc, /* special_function */
1807 "R_PPC_16DX_HA", /* name */
1808 FALSE, /* partial_inplace */
1809 0, /* src_mask */
1810 0x1fffc1, /* dst_mask */
1811 FALSE), /* pcrel_offset */
1812
1813 /* GNU extension to record C++ vtable hierarchy. */
1814 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1815 0, /* rightshift */
1816 0, /* size (0 = byte, 1 = short, 2 = long) */
1817 0, /* bitsize */
1818 FALSE, /* pc_relative */
1819 0, /* bitpos */
1820 complain_overflow_dont, /* complain_on_overflow */
1821 NULL, /* special_function */
1822 "R_PPC_GNU_VTINHERIT", /* name */
1823 FALSE, /* partial_inplace */
1824 0, /* src_mask */
1825 0, /* dst_mask */
1826 FALSE), /* pcrel_offset */
1827
1828 /* GNU extension to record C++ vtable member usage. */
1829 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1830 0, /* rightshift */
1831 0, /* size (0 = byte, 1 = short, 2 = long) */
1832 0, /* bitsize */
1833 FALSE, /* pc_relative */
1834 0, /* bitpos */
1835 complain_overflow_dont, /* complain_on_overflow */
1836 NULL, /* special_function */
1837 "R_PPC_GNU_VTENTRY", /* name */
1838 FALSE, /* partial_inplace */
1839 0, /* src_mask */
1840 0, /* dst_mask */
1841 FALSE), /* pcrel_offset */
1842
1843 /* Phony reloc to handle AIX style TOC entries. */
1844 HOWTO (R_PPC_TOC16, /* type */
1845 0, /* rightshift */
1846 1, /* size (0 = byte, 1 = short, 2 = long) */
1847 16, /* bitsize */
1848 FALSE, /* pc_relative */
1849 0, /* bitpos */
1850 complain_overflow_signed, /* complain_on_overflow */
1851 ppc_elf_unhandled_reloc, /* special_function */
1852 "R_PPC_TOC16", /* name */
1853 FALSE, /* partial_inplace */
1854 0, /* src_mask */
1855 0xffff, /* dst_mask */
1856 FALSE), /* pcrel_offset */
1857 };
1858 \f
1859 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1860
1861 static void
1862 ppc_elf_howto_init (void)
1863 {
1864 unsigned int i, type;
1865
1866 for (i = 0;
1867 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1868 i++)
1869 {
1870 type = ppc_elf_howto_raw[i].type;
1871 if (type >= (sizeof (ppc_elf_howto_table)
1872 / sizeof (ppc_elf_howto_table[0])))
1873 abort ();
1874 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1875 }
1876 }
1877
1878 static reloc_howto_type *
1879 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1880 bfd_reloc_code_real_type code)
1881 {
1882 enum elf_ppc_reloc_type r;
1883
1884 /* Initialize howto table if not already done. */
1885 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1886 ppc_elf_howto_init ();
1887
1888 switch (code)
1889 {
1890 default:
1891 return NULL;
1892
1893 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1894 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1895 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1896 case BFD_RELOC_PPC64_ADDR16_DS:
1897 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1898 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1899 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1900 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1901 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1902 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1903 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1904 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1905 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1906 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1907 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1908 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1909 case BFD_RELOC_PPC64_GOT16_DS:
1910 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1911 case BFD_RELOC_PPC64_GOT16_LO_DS:
1912 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1913 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1914 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1915 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1916 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1917 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1918 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1919 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1920 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1921 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1922 case BFD_RELOC_PPC64_PLT16_LO_DS:
1923 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1924 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1925 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1926 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1927 case BFD_RELOC_PPC64_SECTOFF_DS:
1928 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1929 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1930 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1931 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1932 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1933 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1934 case BFD_RELOC_PPC64_TOC16_DS:
1935 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1936 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1937 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1938 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1939 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1940 case BFD_RELOC_PPC64_TPREL16_DS:
1941 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1942 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1943 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1944 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1945 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1946 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1947 case BFD_RELOC_PPC64_DTPREL16_DS:
1948 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1949 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1950 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1951 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1952 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1953 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1954 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1955 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1956 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1957 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1958 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1959 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1960 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1961 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1962 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1963 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1964 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1965 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1966 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1967 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1968 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1969 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1970 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1971 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1972 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1973 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1974 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1975 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1976 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1977 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1978 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1979 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1980 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1981 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1982 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1983 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1984 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1985 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1986 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1987 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1988 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1989 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1990 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1991 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1992 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1993 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1994 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1995 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1996 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1997 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1998 r = R_PPC_VLE_SDAREL_LO16A;
1999 break;
2000 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
2001 r = R_PPC_VLE_SDAREL_LO16D;
2002 break;
2003 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
2004 r = R_PPC_VLE_SDAREL_HI16A;
2005 break;
2006 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
2007 r = R_PPC_VLE_SDAREL_HI16D;
2008 break;
2009 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
2010 r = R_PPC_VLE_SDAREL_HA16A;
2011 break;
2012 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
2013 r = R_PPC_VLE_SDAREL_HA16D;
2014 break;
2015 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2016 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2017 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2018 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2019 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
2020 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2021 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2022 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2023 }
2024
2025 return ppc_elf_howto_table[r];
2026 };
2027
2028 static reloc_howto_type *
2029 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2030 const char *r_name)
2031 {
2032 unsigned int i;
2033
2034 for (i = 0;
2035 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2036 i++)
2037 if (ppc_elf_howto_raw[i].name != NULL
2038 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2039 return &ppc_elf_howto_raw[i];
2040
2041 return NULL;
2042 }
2043
2044 /* Set the howto pointer for a PowerPC ELF reloc. */
2045
2046 static bfd_boolean
2047 ppc_elf_info_to_howto (bfd *abfd,
2048 arelent *cache_ptr,
2049 Elf_Internal_Rela *dst)
2050 {
2051 unsigned int r_type;
2052
2053 /* Initialize howto table if not already done. */
2054 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2055 ppc_elf_howto_init ();
2056
2057 r_type = ELF32_R_TYPE (dst->r_info);
2058 if (r_type >= R_PPC_max)
2059 {
2060 /* xgettext:c-format */
2061 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2062 abfd, r_type);
2063 bfd_set_error (bfd_error_bad_value);
2064 return FALSE;
2065 }
2066
2067 cache_ptr->howto = ppc_elf_howto_table[r_type];
2068
2069 /* Just because the above assert didn't trigger doesn't mean that
2070 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2071 if (cache_ptr->howto == NULL)
2072 {
2073 /* xgettext:c-format */
2074 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2075 abfd, r_type);
2076 bfd_set_error (bfd_error_bad_value);
2077
2078 return FALSE;
2079 }
2080
2081 return TRUE;
2082 }
2083
2084 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2085
2086 static bfd_reloc_status_type
2087 ppc_elf_addr16_ha_reloc (bfd *abfd,
2088 arelent *reloc_entry,
2089 asymbol *symbol,
2090 void *data,
2091 asection *input_section,
2092 bfd *output_bfd,
2093 char **error_message ATTRIBUTE_UNUSED)
2094 {
2095 enum elf_ppc_reloc_type r_type;
2096 long insn;
2097 bfd_size_type octets;
2098 bfd_vma value;
2099
2100 if (output_bfd != NULL)
2101 {
2102 reloc_entry->address += input_section->output_offset;
2103 return bfd_reloc_ok;
2104 }
2105
2106 reloc_entry->addend += 0x8000;
2107 r_type = reloc_entry->howto->type;
2108 if (r_type != R_PPC_REL16DX_HA)
2109 return bfd_reloc_continue;
2110
2111 value = 0;
2112 if (!bfd_is_com_section (symbol->section))
2113 value = symbol->value;
2114 value += (reloc_entry->addend
2115 + symbol->section->output_offset
2116 + symbol->section->output_section->vma);
2117 value -= (reloc_entry->address
2118 + input_section->output_offset
2119 + input_section->output_section->vma);
2120 value >>= 16;
2121
2122 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2123 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2124 insn &= ~0x1fffc1;
2125 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2126 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2127 return bfd_reloc_ok;
2128 }
2129
2130 static bfd_reloc_status_type
2131 ppc_elf_unhandled_reloc (bfd *abfd,
2132 arelent *reloc_entry,
2133 asymbol *symbol,
2134 void *data,
2135 asection *input_section,
2136 bfd *output_bfd,
2137 char **error_message)
2138 {
2139 /* If this is a relocatable link (output_bfd test tells us), just
2140 call the generic function. Any adjustment will be done at final
2141 link time. */
2142 if (output_bfd != NULL)
2143 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2144 input_section, output_bfd, error_message);
2145
2146 if (error_message != NULL)
2147 {
2148 static char buf[60];
2149 sprintf (buf, _("generic linker can't handle %s"),
2150 reloc_entry->howto->name);
2151 *error_message = buf;
2152 }
2153 return bfd_reloc_dangerous;
2154 }
2155 \f
2156 /* Sections created by the linker. */
2157
2158 typedef struct elf_linker_section
2159 {
2160 /* Pointer to the bfd section. */
2161 asection *section;
2162 /* Section name. */
2163 const char *name;
2164 /* Associated bss section name. */
2165 const char *bss_name;
2166 /* Associated symbol name. */
2167 const char *sym_name;
2168 /* Associated symbol. */
2169 struct elf_link_hash_entry *sym;
2170 } elf_linker_section_t;
2171
2172 /* Linked list of allocated pointer entries. This hangs off of the
2173 symbol lists, and provides allows us to return different pointers,
2174 based on different addend's. */
2175
2176 typedef struct elf_linker_section_pointers
2177 {
2178 /* next allocated pointer for this symbol */
2179 struct elf_linker_section_pointers *next;
2180 /* offset of pointer from beginning of section */
2181 bfd_vma offset;
2182 /* addend used */
2183 bfd_vma addend;
2184 /* which linker section this is */
2185 elf_linker_section_t *lsect;
2186 } elf_linker_section_pointers_t;
2187
2188 struct ppc_elf_obj_tdata
2189 {
2190 struct elf_obj_tdata elf;
2191
2192 /* A mapping from local symbols to offsets into the various linker
2193 sections added. This is index by the symbol index. */
2194 elf_linker_section_pointers_t **linker_section_pointers;
2195
2196 /* Flags used to auto-detect plt type. */
2197 unsigned int makes_plt_call : 1;
2198 unsigned int has_rel16 : 1;
2199 };
2200
2201 #define ppc_elf_tdata(bfd) \
2202 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2203
2204 #define elf_local_ptr_offsets(bfd) \
2205 (ppc_elf_tdata (bfd)->linker_section_pointers)
2206
2207 #define is_ppc_elf(bfd) \
2208 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2209 && elf_object_id (bfd) == PPC32_ELF_DATA)
2210
2211 /* Override the generic function because we store some extras. */
2212
2213 static bfd_boolean
2214 ppc_elf_mkobject (bfd *abfd)
2215 {
2216 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2217 PPC32_ELF_DATA);
2218 }
2219
2220 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2221
2222 bfd_boolean
2223 _bfd_elf_ppc_set_arch (bfd *abfd)
2224 {
2225 unsigned long mach = 0;
2226 asection *s;
2227 unsigned char *contents;
2228
2229 if (abfd->arch_info->bits_per_word == 32
2230 && bfd_big_endian (abfd))
2231 {
2232
2233 for (s = abfd->sections; s != NULL; s = s->next)
2234 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2235 break;
2236 if (s != NULL)
2237 mach = bfd_mach_ppc_vle;
2238 }
2239
2240 if (mach == 0)
2241 {
2242 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2243 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2244 {
2245 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2246 unsigned int i;
2247
2248 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2249 {
2250 unsigned int val = bfd_get_32 (abfd, contents + i);
2251 switch (val >> 16)
2252 {
2253 case PPC_APUINFO_PMR:
2254 case PPC_APUINFO_RFMCI:
2255 if (mach == 0)
2256 mach = bfd_mach_ppc_titan;
2257 break;
2258
2259 case PPC_APUINFO_ISEL:
2260 case PPC_APUINFO_CACHELCK:
2261 if (mach == bfd_mach_ppc_titan)
2262 mach = bfd_mach_ppc_e500mc;
2263 break;
2264
2265 case PPC_APUINFO_SPE:
2266 case PPC_APUINFO_EFS:
2267 case PPC_APUINFO_BRLOCK:
2268 if (mach != bfd_mach_ppc_vle)
2269 mach = bfd_mach_ppc_e500;
2270 break;
2271
2272 case PPC_APUINFO_VLE:
2273 mach = bfd_mach_ppc_vle;
2274 break;
2275
2276 default:
2277 mach = -1ul;
2278 }
2279 }
2280 free (contents);
2281 }
2282 }
2283
2284 if (mach != 0 && mach != -1ul)
2285 {
2286 const bfd_arch_info_type *arch;
2287
2288 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2289 if (arch->mach == mach)
2290 {
2291 abfd->arch_info = arch;
2292 break;
2293 }
2294 }
2295 return TRUE;
2296 }
2297
2298 /* Fix bad default arch selected for a 32 bit input bfd when the
2299 default is 64 bit. Also select arch based on apuinfo. */
2300
2301 static bfd_boolean
2302 ppc_elf_object_p (bfd *abfd)
2303 {
2304 if (!abfd->arch_info->the_default)
2305 return TRUE;
2306
2307 if (abfd->arch_info->bits_per_word == 64)
2308 {
2309 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2310
2311 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2312 {
2313 /* Relies on arch after 64 bit default being 32 bit default. */
2314 abfd->arch_info = abfd->arch_info->next;
2315 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2316 }
2317 }
2318 return _bfd_elf_ppc_set_arch (abfd);
2319 }
2320
2321 /* Function to set whether a module needs the -mrelocatable bit set. */
2322
2323 static bfd_boolean
2324 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2325 {
2326 BFD_ASSERT (!elf_flags_init (abfd)
2327 || elf_elfheader (abfd)->e_flags == flags);
2328
2329 elf_elfheader (abfd)->e_flags = flags;
2330 elf_flags_init (abfd) = TRUE;
2331 return TRUE;
2332 }
2333
2334 /* Support for core dump NOTE sections. */
2335
2336 static bfd_boolean
2337 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2338 {
2339 int offset;
2340 unsigned int size;
2341
2342 switch (note->descsz)
2343 {
2344 default:
2345 return FALSE;
2346
2347 case 268: /* Linux/PPC. */
2348 /* pr_cursig */
2349 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2350
2351 /* pr_pid */
2352 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2353
2354 /* pr_reg */
2355 offset = 72;
2356 size = 192;
2357
2358 break;
2359 }
2360
2361 /* Make a ".reg/999" section. */
2362 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2363 size, note->descpos + offset);
2364 }
2365
2366 static bfd_boolean
2367 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2368 {
2369 switch (note->descsz)
2370 {
2371 default:
2372 return FALSE;
2373
2374 case 128: /* Linux/PPC elf_prpsinfo. */
2375 elf_tdata (abfd)->core->pid
2376 = bfd_get_32 (abfd, note->descdata + 16);
2377 elf_tdata (abfd)->core->program
2378 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2379 elf_tdata (abfd)->core->command
2380 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2381 }
2382
2383 /* Note that for some reason, a spurious space is tacked
2384 onto the end of the args in some (at least one anyway)
2385 implementations, so strip it off if it exists. */
2386
2387 {
2388 char *command = elf_tdata (abfd)->core->command;
2389 int n = strlen (command);
2390
2391 if (0 < n && command[n - 1] == ' ')
2392 command[n - 1] = '\0';
2393 }
2394
2395 return TRUE;
2396 }
2397
2398 static char *
2399 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2400 {
2401 switch (note_type)
2402 {
2403 default:
2404 return NULL;
2405
2406 case NT_PRPSINFO:
2407 {
2408 char data[128] ATTRIBUTE_NONSTRING;
2409 va_list ap;
2410
2411 va_start (ap, note_type);
2412 memset (data, 0, sizeof (data));
2413 strncpy (data + 32, va_arg (ap, const char *), 16);
2414 DIAGNOSTIC_PUSH;
2415 /* GCC 8.1 warns about 80 equals destination size with
2416 -Wstringop-truncation:
2417 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
2418 */
2419 #if GCC_VERSION == 8001
2420 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
2421 #endif
2422 strncpy (data + 48, va_arg (ap, const char *), 80);
2423 DIAGNOSTIC_POP;
2424 va_end (ap);
2425 return elfcore_write_note (abfd, buf, bufsiz,
2426 "CORE", note_type, data, sizeof (data));
2427 }
2428
2429 case NT_PRSTATUS:
2430 {
2431 char data[268];
2432 va_list ap;
2433 long pid;
2434 int cursig;
2435 const void *greg;
2436
2437 va_start (ap, note_type);
2438 memset (data, 0, 72);
2439 pid = va_arg (ap, long);
2440 bfd_put_32 (abfd, pid, data + 24);
2441 cursig = va_arg (ap, int);
2442 bfd_put_16 (abfd, cursig, data + 12);
2443 greg = va_arg (ap, const void *);
2444 memcpy (data + 72, greg, 192);
2445 memset (data + 264, 0, 4);
2446 va_end (ap);
2447 return elfcore_write_note (abfd, buf, bufsiz,
2448 "CORE", note_type, data, sizeof (data));
2449 }
2450 }
2451 }
2452
2453 static flagword
2454 ppc_elf_lookup_section_flags (char *flag_name)
2455 {
2456
2457 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2458 return SHF_PPC_VLE;
2459
2460 return 0;
2461 }
2462
2463 /* Return address for Ith PLT stub in section PLT, for relocation REL
2464 or (bfd_vma) -1 if it should not be included. */
2465
2466 static bfd_vma
2467 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2468 const asection *plt ATTRIBUTE_UNUSED,
2469 const arelent *rel)
2470 {
2471 return rel->address;
2472 }
2473
2474 /* Handle a PowerPC specific section when reading an object file. This
2475 is called when bfd_section_from_shdr finds a section with an unknown
2476 type. */
2477
2478 static bfd_boolean
2479 ppc_elf_section_from_shdr (bfd *abfd,
2480 Elf_Internal_Shdr *hdr,
2481 const char *name,
2482 int shindex)
2483 {
2484 asection *newsect;
2485 flagword flags;
2486
2487 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2488 return FALSE;
2489
2490 newsect = hdr->bfd_section;
2491 flags = bfd_get_section_flags (abfd, newsect);
2492 if (hdr->sh_flags & SHF_EXCLUDE)
2493 flags |= SEC_EXCLUDE;
2494
2495 if (hdr->sh_type == SHT_ORDERED)
2496 flags |= SEC_SORT_ENTRIES;
2497
2498 bfd_set_section_flags (abfd, newsect, flags);
2499 return TRUE;
2500 }
2501
2502 /* Set up any other section flags and such that may be necessary. */
2503
2504 static bfd_boolean
2505 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2506 Elf_Internal_Shdr *shdr,
2507 asection *asect)
2508 {
2509 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2510 shdr->sh_type = SHT_ORDERED;
2511
2512 return TRUE;
2513 }
2514
2515 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2516 need to bump up the number of section headers. */
2517
2518 static int
2519 ppc_elf_additional_program_headers (bfd *abfd,
2520 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2521 {
2522 asection *s;
2523 int ret = 0;
2524
2525 s = bfd_get_section_by_name (abfd, ".sbss2");
2526 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2527 ++ret;
2528
2529 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2530 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2531 ++ret;
2532
2533 return ret;
2534 }
2535
2536 /* Modify the segment map for VLE executables. */
2537
2538 bfd_boolean
2539 ppc_elf_modify_segment_map (bfd *abfd,
2540 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2541 {
2542 struct elf_segment_map *m;
2543
2544 /* At this point in the link, output sections have already been sorted by
2545 LMA and assigned to segments. All that is left to do is to ensure
2546 there is no mixing of VLE & non-VLE sections in a text segment.
2547 If we find that case, we split the segment.
2548 We maintain the original output section order. */
2549
2550 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2551 {
2552 struct elf_segment_map *n;
2553 bfd_size_type amt;
2554 unsigned int j, k;
2555 unsigned int p_flags;
2556
2557 if (m->p_type != PT_LOAD || m->count == 0)
2558 continue;
2559
2560 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2561 {
2562 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2563 p_flags |= PF_W;
2564 if ((m->sections[j]->flags & SEC_CODE) != 0)
2565 {
2566 p_flags |= PF_X;
2567 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2568 p_flags |= PF_PPC_VLE;
2569 break;
2570 }
2571 }
2572 if (j != m->count)
2573 while (++j != m->count)
2574 {
2575 unsigned int p_flags1 = PF_R;
2576
2577 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2578 p_flags1 |= PF_W;
2579 if ((m->sections[j]->flags & SEC_CODE) != 0)
2580 {
2581 p_flags1 |= PF_X;
2582 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2583 p_flags1 |= PF_PPC_VLE;
2584 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2585 break;
2586 }
2587 p_flags |= p_flags1;
2588 }
2589 /* If we're splitting a segment which originally contained rw
2590 sections then those sections might now only be in one of the
2591 two parts. So always set p_flags if splitting, even if we
2592 are being called for objcopy with p_flags_valid set. */
2593 if (j != m->count || !m->p_flags_valid)
2594 {
2595 m->p_flags_valid = 1;
2596 m->p_flags = p_flags;
2597 }
2598 if (j == m->count)
2599 continue;
2600
2601 /* Sections 0..j-1 stay in this (current) segment,
2602 the remainder are put in a new segment.
2603 The scan resumes with the new segment. */
2604
2605 amt = sizeof (struct elf_segment_map);
2606 amt += (m->count - j - 1) * sizeof (asection *);
2607 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2608 if (n == NULL)
2609 return FALSE;
2610
2611 n->p_type = PT_LOAD;
2612 n->count = m->count - j;
2613 for (k = 0; k < n->count; ++k)
2614 n->sections[k] = m->sections[j + k];
2615 m->count = j;
2616 m->p_size_valid = 0;
2617 n->next = m->next;
2618 m->next = n;
2619 }
2620
2621 return TRUE;
2622 }
2623
2624 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2625 .PPC.EMB.sbss0 a normal section, and not a bss section so
2626 that the linker doesn't crater when trying to make more than
2627 2 sections. */
2628
2629 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2630 {
2631 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2632 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2633 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2634 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2635 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2636 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2637 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2638 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2639 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2640 { NULL, 0, 0, 0, 0 }
2641 };
2642
2643 /* This is what we want for new plt/got. */
2644 static struct bfd_elf_special_section ppc_alt_plt =
2645 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2646
2647 static const struct bfd_elf_special_section *
2648 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2649 {
2650 const struct bfd_elf_special_section *ssect;
2651
2652 /* See if this is one of the special sections. */
2653 if (sec->name == NULL)
2654 return NULL;
2655
2656 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2657 sec->use_rela_p);
2658 if (ssect != NULL)
2659 {
2660 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2661 ssect = &ppc_alt_plt;
2662 return ssect;
2663 }
2664
2665 return _bfd_elf_get_sec_type_attr (abfd, sec);
2666 }
2667 \f
2668 /* Very simple linked list structure for recording apuinfo values. */
2669 typedef struct apuinfo_list
2670 {
2671 struct apuinfo_list *next;
2672 unsigned long value;
2673 }
2674 apuinfo_list;
2675
2676 static apuinfo_list *head;
2677 static bfd_boolean apuinfo_set;
2678
2679 static void
2680 apuinfo_list_init (void)
2681 {
2682 head = NULL;
2683 apuinfo_set = FALSE;
2684 }
2685
2686 static void
2687 apuinfo_list_add (unsigned long value)
2688 {
2689 apuinfo_list *entry = head;
2690
2691 while (entry != NULL)
2692 {
2693 if (entry->value == value)
2694 return;
2695 entry = entry->next;
2696 }
2697
2698 entry = bfd_malloc (sizeof (* entry));
2699 if (entry == NULL)
2700 return;
2701
2702 entry->value = value;
2703 entry->next = head;
2704 head = entry;
2705 }
2706
2707 static unsigned
2708 apuinfo_list_length (void)
2709 {
2710 apuinfo_list *entry;
2711 unsigned long count;
2712
2713 for (entry = head, count = 0;
2714 entry;
2715 entry = entry->next)
2716 ++ count;
2717
2718 return count;
2719 }
2720
2721 static inline unsigned long
2722 apuinfo_list_element (unsigned long number)
2723 {
2724 apuinfo_list * entry;
2725
2726 for (entry = head;
2727 entry && number --;
2728 entry = entry->next)
2729 ;
2730
2731 return entry ? entry->value : 0;
2732 }
2733
2734 static void
2735 apuinfo_list_finish (void)
2736 {
2737 apuinfo_list *entry;
2738
2739 for (entry = head; entry;)
2740 {
2741 apuinfo_list *next = entry->next;
2742 free (entry);
2743 entry = next;
2744 }
2745
2746 head = NULL;
2747 }
2748
2749 /* Scan the input BFDs and create a linked list of
2750 the APUinfo values that will need to be emitted. */
2751
2752 static void
2753 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2754 {
2755 bfd *ibfd;
2756 asection *asec;
2757 char *buffer = NULL;
2758 bfd_size_type largest_input_size = 0;
2759 unsigned i;
2760 unsigned long length;
2761 const char *error_message = NULL;
2762
2763 if (link_info == NULL)
2764 return;
2765
2766 apuinfo_list_init ();
2767
2768 /* Read in the input sections contents. */
2769 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2770 {
2771 unsigned long datum;
2772
2773 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2774 if (asec == NULL)
2775 continue;
2776
2777 /* xgettext:c-format */
2778 error_message = _("corrupt %s section in %pB");
2779 length = asec->size;
2780 if (length < 20)
2781 goto fail;
2782
2783 apuinfo_set = TRUE;
2784 if (largest_input_size < asec->size)
2785 {
2786 if (buffer)
2787 free (buffer);
2788 largest_input_size = asec->size;
2789 buffer = bfd_malloc (largest_input_size);
2790 if (!buffer)
2791 return;
2792 }
2793
2794 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2795 || (bfd_bread (buffer, length, ibfd) != length))
2796 {
2797 /* xgettext:c-format */
2798 error_message = _("unable to read in %s section from %pB");
2799 goto fail;
2800 }
2801
2802 /* Verify the contents of the header. Note - we have to
2803 extract the values this way in order to allow for a
2804 host whose endian-ness is different from the target. */
2805 datum = bfd_get_32 (ibfd, buffer);
2806 if (datum != sizeof APUINFO_LABEL)
2807 goto fail;
2808
2809 datum = bfd_get_32 (ibfd, buffer + 8);
2810 if (datum != 0x2)
2811 goto fail;
2812
2813 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2814 goto fail;
2815
2816 /* Get the number of bytes used for apuinfo entries. */
2817 datum = bfd_get_32 (ibfd, buffer + 4);
2818 if (datum + 20 != length)
2819 goto fail;
2820
2821 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2822 for (i = 0; i < datum; i += 4)
2823 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2824 }
2825
2826 error_message = NULL;
2827
2828 if (apuinfo_set)
2829 {
2830 /* Compute the size of the output section. */
2831 unsigned num_entries = apuinfo_list_length ();
2832
2833 /* Set the output section size, if it exists. */
2834 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2835
2836 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2837 {
2838 ibfd = abfd;
2839 /* xgettext:c-format */
2840 error_message = _("warning: unable to set size of %s section in %pB");
2841 }
2842 }
2843
2844 fail:
2845 if (buffer)
2846 free (buffer);
2847
2848 if (error_message)
2849 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
2850 }
2851
2852 /* Prevent the output section from accumulating the input sections'
2853 contents. We have already stored this in our linked list structure. */
2854
2855 static bfd_boolean
2856 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2857 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2858 asection *asec,
2859 bfd_byte *contents ATTRIBUTE_UNUSED)
2860 {
2861 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2862 }
2863
2864 /* Finally we can generate the output section. */
2865
2866 static void
2867 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2868 {
2869 bfd_byte *buffer;
2870 asection *asec;
2871 unsigned i;
2872 unsigned num_entries;
2873 bfd_size_type length;
2874
2875 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2876 if (asec == NULL)
2877 return;
2878
2879 if (!apuinfo_set)
2880 return;
2881
2882 length = asec->size;
2883 if (length < 20)
2884 return;
2885
2886 buffer = bfd_malloc (length);
2887 if (buffer == NULL)
2888 {
2889 _bfd_error_handler
2890 (_("failed to allocate space for new APUinfo section"));
2891 return;
2892 }
2893
2894 /* Create the apuinfo header. */
2895 num_entries = apuinfo_list_length ();
2896 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2897 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2898 bfd_put_32 (abfd, 0x2, buffer + 8);
2899 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2900
2901 length = 20;
2902 for (i = 0; i < num_entries; i++)
2903 {
2904 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2905 length += 4;
2906 }
2907
2908 if (length != asec->size)
2909 _bfd_error_handler (_("failed to compute new APUinfo section"));
2910
2911 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2912 _bfd_error_handler (_("failed to install new APUinfo section"));
2913
2914 free (buffer);
2915
2916 apuinfo_list_finish ();
2917 }
2918 \f
2919 static bfd_boolean
2920 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2921 {
2922 bfd_byte buf[4 * 4];
2923
2924 if (!bfd_get_section_contents (abfd, glink, buf, off, sizeof buf))
2925 return FALSE;
2926
2927 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2928 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2929 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2930 && bfd_get_32 (abfd, buf + 12) == BCTR);
2931 }
2932
2933 static bfd_boolean
2934 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2935 {
2936 bfd_vma vma = *(bfd_vma *) ptr;
2937 return ((section->flags & SEC_ALLOC) != 0
2938 && section->vma <= vma
2939 && vma < section->vma + section->size);
2940 }
2941
2942 static long
2943 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2944 long dynsymcount, asymbol **dynsyms,
2945 asymbol **ret)
2946 {
2947 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2948 asection *plt, *relplt, *dynamic, *glink;
2949 bfd_vma glink_vma = 0;
2950 bfd_vma resolv_vma = 0;
2951 bfd_vma stub_off;
2952 asymbol *s;
2953 arelent *p;
2954 long count, i, stub_delta;
2955 size_t size;
2956 char *names;
2957 bfd_byte buf[4];
2958
2959 *ret = NULL;
2960
2961 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2962 return 0;
2963
2964 if (dynsymcount <= 0)
2965 return 0;
2966
2967 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2968 if (relplt == NULL)
2969 return 0;
2970
2971 plt = bfd_get_section_by_name (abfd, ".plt");
2972 if (plt == NULL)
2973 return 0;
2974
2975 /* Call common code to handle old-style executable PLTs. */
2976 if (elf_section_flags (plt) & SHF_EXECINSTR)
2977 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2978 dynsymcount, dynsyms, ret);
2979
2980 /* If this object was prelinked, the prelinker stored the address
2981 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2982 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2983 if (dynamic != NULL)
2984 {
2985 bfd_byte *dynbuf, *extdyn, *extdynend;
2986 size_t extdynsize;
2987 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2988
2989 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2990 return -1;
2991
2992 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2993 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2994
2995 extdyn = dynbuf;
2996 extdynend = extdyn + dynamic->size;
2997 for (; extdyn < extdynend; extdyn += extdynsize)
2998 {
2999 Elf_Internal_Dyn dyn;
3000 (*swap_dyn_in) (abfd, extdyn, &dyn);
3001
3002 if (dyn.d_tag == DT_NULL)
3003 break;
3004
3005 if (dyn.d_tag == DT_PPC_GOT)
3006 {
3007 unsigned int g_o_t = dyn.d_un.d_val;
3008 asection *got = bfd_get_section_by_name (abfd, ".got");
3009 if (got != NULL
3010 && bfd_get_section_contents (abfd, got, buf,
3011 g_o_t - got->vma + 4, 4))
3012 glink_vma = bfd_get_32 (abfd, buf);
3013 break;
3014 }
3015 }
3016 free (dynbuf);
3017 }
3018
3019 /* Otherwise we read the first plt entry. */
3020 if (glink_vma == 0)
3021 {
3022 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3023 glink_vma = bfd_get_32 (abfd, buf);
3024 }
3025
3026 if (glink_vma == 0)
3027 return 0;
3028
3029 /* The .glink section usually does not survive the final
3030 link; search for the section (usually .text) where the
3031 glink stubs now reside. */
3032 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3033 if (glink == NULL)
3034 return 0;
3035
3036 /* Determine glink PLT resolver by reading the relative branch
3037 from the first glink stub. */
3038 if (bfd_get_section_contents (abfd, glink, buf,
3039 glink_vma - glink->vma, 4))
3040 {
3041 unsigned int insn = bfd_get_32 (abfd, buf);
3042
3043 /* The first glink stub may either branch to the resolver ... */
3044 insn ^= B;
3045 if ((insn & ~0x3fffffc) == 0)
3046 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3047
3048 /* ... or fall through a bunch of NOPs. */
3049 else if ((insn ^ B ^ NOP) == 0)
3050 for (i = 4;
3051 bfd_get_section_contents (abfd, glink, buf,
3052 glink_vma - glink->vma + i, 4);
3053 i += 4)
3054 if (bfd_get_32 (abfd, buf) != NOP)
3055 {
3056 resolv_vma = glink_vma + i;
3057 break;
3058 }
3059 }
3060
3061 count = relplt->size / sizeof (Elf32_External_Rela);
3062 /* If the stubs are those for -shared/-pie then we might have
3063 multiple stubs for each plt entry. If that is the case then
3064 there is no way to associate stubs with their plt entries short
3065 of figuring out the GOT pointer value used in the stub.
3066 The offsets tested here need to cover all possible values of
3067 GLINK_ENTRY_SIZE for other than __tls_get_addr_opt. */
3068 stub_off = glink_vma - glink->vma;
3069 for (stub_delta = 16; stub_delta <= 32; stub_delta += 8)
3070 if (is_nonpic_glink_stub (abfd, glink, stub_off - stub_delta))
3071 break;
3072 if (stub_delta > 32)
3073 return 0;
3074
3075 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3076 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3077 return -1;
3078
3079 size = count * sizeof (asymbol);
3080 p = relplt->relocation;
3081 for (i = 0; i < count; i++, p++)
3082 {
3083 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3084 if (p->addend != 0)
3085 size += sizeof ("+0x") - 1 + 8;
3086 }
3087
3088 size += sizeof (asymbol) + sizeof ("__glink");
3089
3090 if (resolv_vma)
3091 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3092
3093 s = *ret = bfd_malloc (size);
3094 if (s == NULL)
3095 return -1;
3096
3097 stub_off = glink_vma - glink->vma;
3098 names = (char *) (s + count + 1 + (resolv_vma != 0));
3099 p = relplt->relocation + count - 1;
3100 for (i = 0; i < count; i++)
3101 {
3102 size_t len;
3103
3104 stub_off -= stub_delta;
3105 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3106 stub_off -= 32;
3107 *s = **p->sym_ptr_ptr;
3108 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3109 we are defining a symbol, ensure one of them is set. */
3110 if ((s->flags & BSF_LOCAL) == 0)
3111 s->flags |= BSF_GLOBAL;
3112 s->flags |= BSF_SYNTHETIC;
3113 s->section = glink;
3114 s->value = stub_off;
3115 s->name = names;
3116 s->udata.p = NULL;
3117 len = strlen ((*p->sym_ptr_ptr)->name);
3118 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3119 names += len;
3120 if (p->addend != 0)
3121 {
3122 memcpy (names, "+0x", sizeof ("+0x") - 1);
3123 names += sizeof ("+0x") - 1;
3124 bfd_sprintf_vma (abfd, names, p->addend);
3125 names += strlen (names);
3126 }
3127 memcpy (names, "@plt", sizeof ("@plt"));
3128 names += sizeof ("@plt");
3129 ++s;
3130 --p;
3131 }
3132
3133 /* Add a symbol at the start of the glink branch table. */
3134 memset (s, 0, sizeof *s);
3135 s->the_bfd = abfd;
3136 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3137 s->section = glink;
3138 s->value = glink_vma - glink->vma;
3139 s->name = names;
3140 memcpy (names, "__glink", sizeof ("__glink"));
3141 names += sizeof ("__glink");
3142 s++;
3143 count++;
3144
3145 if (resolv_vma)
3146 {
3147 /* Add a symbol for the glink PLT resolver. */
3148 memset (s, 0, sizeof *s);
3149 s->the_bfd = abfd;
3150 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3151 s->section = glink;
3152 s->value = resolv_vma - glink->vma;
3153 s->name = names;
3154 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3155 names += sizeof ("__glink_PLTresolve");
3156 s++;
3157 count++;
3158 }
3159
3160 return count;
3161 }
3162 \f
3163 /* The following functions are specific to the ELF linker, while
3164 functions above are used generally. They appear in this file more
3165 or less in the order in which they are called. eg.
3166 ppc_elf_check_relocs is called early in the link process,
3167 ppc_elf_finish_dynamic_sections is one of the last functions
3168 called. */
3169
3170 /* Track PLT entries needed for a given symbol. We might need more
3171 than one glink entry per symbol when generating a pic binary. */
3172 struct plt_entry
3173 {
3174 struct plt_entry *next;
3175
3176 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3177 This field stores the offset into .got2 used to initialise the
3178 GOT pointer reg. It will always be at least 32768. (Current
3179 gcc always uses an offset of 32768, but ld -r will pack .got2
3180 sections together resulting in larger offsets). */
3181 bfd_vma addend;
3182
3183 /* The .got2 section. */
3184 asection *sec;
3185
3186 /* PLT refcount or offset. */
3187 union
3188 {
3189 bfd_signed_vma refcount;
3190 bfd_vma offset;
3191 } plt;
3192
3193 /* .glink stub offset. */
3194 bfd_vma glink_offset;
3195 };
3196
3197 /* Of those relocs that might be copied as dynamic relocs, this
3198 function selects those that must be copied when linking a shared
3199 library or PIE, even when the symbol is local. */
3200
3201 static int
3202 must_be_dyn_reloc (struct bfd_link_info *info,
3203 enum elf_ppc_reloc_type r_type)
3204 {
3205 switch (r_type)
3206 {
3207 default:
3208 /* Only relative relocs can be resolved when the object load
3209 address isn't fixed. DTPREL32 is excluded because the
3210 dynamic linker needs to differentiate global dynamic from
3211 local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
3212 return 1;
3213
3214 case R_PPC_REL24:
3215 case R_PPC_REL14:
3216 case R_PPC_REL14_BRTAKEN:
3217 case R_PPC_REL14_BRNTAKEN:
3218 case R_PPC_REL32:
3219 return 0;
3220
3221 case R_PPC_TPREL32:
3222 case R_PPC_TPREL16:
3223 case R_PPC_TPREL16_LO:
3224 case R_PPC_TPREL16_HI:
3225 case R_PPC_TPREL16_HA:
3226 /* These relocations are relative but in a shared library the
3227 linker doesn't know the thread pointer base. */
3228 return bfd_link_dll (info);
3229 }
3230 }
3231
3232 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3233 copying dynamic variables from a shared lib into an app's dynbss
3234 section, and instead use a dynamic relocation to point into the
3235 shared lib. */
3236 #define ELIMINATE_COPY_RELOCS 1
3237
3238 /* Used to track dynamic relocations for local symbols. */
3239 struct ppc_dyn_relocs
3240 {
3241 struct ppc_dyn_relocs *next;
3242
3243 /* The input section of the reloc. */
3244 asection *sec;
3245
3246 /* Total number of relocs copied for the input section. */
3247 unsigned int count : 31;
3248
3249 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3250 unsigned int ifunc : 1;
3251 };
3252
3253 /* PPC ELF linker hash entry. */
3254
3255 struct ppc_elf_link_hash_entry
3256 {
3257 struct elf_link_hash_entry elf;
3258
3259 /* If this symbol is used in the linker created sections, the processor
3260 specific backend uses this field to map the field into the offset
3261 from the beginning of the section. */
3262 elf_linker_section_pointers_t *linker_section_pointer;
3263
3264 /* Track dynamic relocs copied for this symbol. */
3265 struct elf_dyn_relocs *dyn_relocs;
3266
3267 /* Contexts in which symbol is used in the GOT.
3268 Bits are or'd into the mask as the corresponding relocs are
3269 encountered during check_relocs, with TLS_TLS being set when any
3270 of the other TLS bits are set. tls_optimize clears bits when
3271 optimizing to indicate the corresponding GOT entry type is not
3272 needed. If set, TLS_TLS is never cleared. tls_optimize may also
3273 set TLS_TPRELGD when a GD reloc turns into a TPREL one. We use a
3274 separate flag rather than setting TPREL just for convenience in
3275 distinguishing the two cases.
3276 These flags are also kept for local symbols. */
3277 #define TLS_TLS 1 /* Any TLS reloc. */
3278 #define TLS_GD 2 /* GD reloc. */
3279 #define TLS_LD 4 /* LD reloc. */
3280 #define TLS_TPREL 8 /* TPREL reloc, => IE. */
3281 #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */
3282 #define TLS_MARK 32 /* __tls_get_addr call marked. */
3283 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3284 unsigned char tls_mask;
3285
3286 /* The above field is also used to mark function symbols. In which
3287 case TLS_TLS will be 0. */
3288 #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */
3289 #define PLT_KEEP 4 /* inline plt call requires plt entry. */
3290 #define NON_GOT 256 /* local symbol plt, not stored. */
3291
3292 /* Nonzero if we have seen a small data relocation referring to this
3293 symbol. */
3294 unsigned char has_sda_refs : 1;
3295
3296 /* Flag use of given relocations. */
3297 unsigned char has_addr16_ha : 1;
3298 unsigned char has_addr16_lo : 1;
3299 };
3300
3301 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3302
3303 /* PPC ELF linker hash table. */
3304
3305 struct ppc_elf_link_hash_table
3306 {
3307 struct elf_link_hash_table elf;
3308
3309 /* Various options passed from the linker. */
3310 struct ppc_elf_params *params;
3311
3312 /* Short-cuts to get to dynamic linker sections. */
3313 asection *glink;
3314 asection *dynsbss;
3315 asection *relsbss;
3316 elf_linker_section_t sdata[2];
3317 asection *sbss;
3318 asection *glink_eh_frame;
3319 asection *pltlocal;
3320 asection *relpltlocal;
3321
3322 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3323 asection *srelplt2;
3324
3325 /* Shortcut to __tls_get_addr. */
3326 struct elf_link_hash_entry *tls_get_addr;
3327
3328 /* The bfd that forced an old-style PLT. */
3329 bfd *old_bfd;
3330
3331 /* TLS local dynamic got entry handling. */
3332 union {
3333 bfd_signed_vma refcount;
3334 bfd_vma offset;
3335 } tlsld_got;
3336
3337 /* Offset of branch table to PltResolve function in glink. */
3338 bfd_vma glink_pltresolve;
3339
3340 /* Size of reserved GOT entries. */
3341 unsigned int got_header_size;
3342 /* Non-zero if allocating the header left a gap. */
3343 unsigned int got_gap;
3344
3345 /* The type of PLT we have chosen to use. */
3346 enum ppc_elf_plt_type plt_type;
3347
3348 /* True if the target system is VxWorks. */
3349 unsigned int is_vxworks:1;
3350
3351 /* Whether there exist local gnu indirect function resolvers,
3352 referenced by dynamic relocations. */
3353 unsigned int local_ifunc_resolver:1;
3354 unsigned int maybe_local_ifunc_resolver:1;
3355
3356 /* Set if tls optimization is enabled. */
3357 unsigned int do_tls_opt:1;
3358
3359 /* Set if inline plt calls should be converted to direct calls. */
3360 unsigned int can_convert_all_inline_plt:1;
3361
3362 /* The size of PLT entries. */
3363 int plt_entry_size;
3364 /* The distance between adjacent PLT slots. */
3365 int plt_slot_size;
3366 /* The size of the first PLT entry. */
3367 int plt_initial_entry_size;
3368
3369 /* Small local sym cache. */
3370 struct sym_cache sym_cache;
3371 };
3372
3373 /* Rename some of the generic section flags to better document how they
3374 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3375
3376 /* Nonzero if this section has TLS related relocations. */
3377 #define has_tls_reloc sec_flg0
3378
3379 /* Nonzero if this section has a call to __tls_get_addr. */
3380 #define has_tls_get_addr_call sec_flg1
3381
3382 /* Flag set when PLTCALL relocs are detected. */
3383 #define has_pltcall sec_flg2
3384
3385 /* Get the PPC ELF linker hash table from a link_info structure. */
3386
3387 #define ppc_elf_hash_table(p) \
3388 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3389 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3390
3391 /* Create an entry in a PPC ELF linker hash table. */
3392
3393 static struct bfd_hash_entry *
3394 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3395 struct bfd_hash_table *table,
3396 const char *string)
3397 {
3398 /* Allocate the structure if it has not already been allocated by a
3399 subclass. */
3400 if (entry == NULL)
3401 {
3402 entry = bfd_hash_allocate (table,
3403 sizeof (struct ppc_elf_link_hash_entry));
3404 if (entry == NULL)
3405 return entry;
3406 }
3407
3408 /* Call the allocation method of the superclass. */
3409 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3410 if (entry != NULL)
3411 {
3412 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3413 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3414 ppc_elf_hash_entry (entry)->tls_mask = 0;
3415 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3416 }
3417
3418 return entry;
3419 }
3420
3421 /* Create a PPC ELF linker hash table. */
3422
3423 static struct bfd_link_hash_table *
3424 ppc_elf_link_hash_table_create (bfd *abfd)
3425 {
3426 struct ppc_elf_link_hash_table *ret;
3427 static struct ppc_elf_params default_params
3428 = { PLT_OLD, 0, 0, 1, 0, 0, 12, 0, 0, 0 };
3429
3430 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3431 if (ret == NULL)
3432 return NULL;
3433
3434 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3435 ppc_elf_link_hash_newfunc,
3436 sizeof (struct ppc_elf_link_hash_entry),
3437 PPC32_ELF_DATA))
3438 {
3439 free (ret);
3440 return NULL;
3441 }
3442
3443 ret->elf.init_plt_refcount.refcount = 0;
3444 ret->elf.init_plt_refcount.glist = NULL;
3445 ret->elf.init_plt_offset.offset = 0;
3446 ret->elf.init_plt_offset.glist = NULL;
3447
3448 ret->params = &default_params;
3449
3450 ret->sdata[0].name = ".sdata";
3451 ret->sdata[0].sym_name = "_SDA_BASE_";
3452 ret->sdata[0].bss_name = ".sbss";
3453
3454 ret->sdata[1].name = ".sdata2";
3455 ret->sdata[1].sym_name = "_SDA2_BASE_";
3456 ret->sdata[1].bss_name = ".sbss2";
3457
3458 ret->plt_entry_size = 12;
3459 ret->plt_slot_size = 8;
3460 ret->plt_initial_entry_size = 72;
3461
3462 return &ret->elf.root;
3463 }
3464
3465 /* Hook linker params into hash table. */
3466
3467 void
3468 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3469 {
3470 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3471
3472 if (htab)
3473 htab->params = params;
3474 params->pagesize_p2 = bfd_log2 (params->pagesize);
3475 }
3476
3477 /* Create .got and the related sections. */
3478
3479 static bfd_boolean
3480 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3481 {
3482 struct ppc_elf_link_hash_table *htab;
3483
3484 if (!_bfd_elf_create_got_section (abfd, info))
3485 return FALSE;
3486
3487 htab = ppc_elf_hash_table (info);
3488 if (!htab->is_vxworks)
3489 {
3490 /* The powerpc .got has a blrl instruction in it. Mark it
3491 executable. */
3492 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3493 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3494 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3495 return FALSE;
3496 }
3497
3498 return TRUE;
3499 }
3500
3501 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3502 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3503 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3504
3505 static bfd_boolean
3506 ppc_elf_create_linker_section (bfd *abfd,
3507 struct bfd_link_info *info,
3508 flagword flags,
3509 elf_linker_section_t *lsect)
3510 {
3511 asection *s;
3512
3513 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3514 | SEC_LINKER_CREATED);
3515
3516 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3517 if (s == NULL)
3518 return FALSE;
3519 lsect->section = s;
3520
3521 /* Define the sym on the first section of this name. */
3522 s = bfd_get_section_by_name (abfd, lsect->name);
3523
3524 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3525 if (lsect->sym == NULL)
3526 return FALSE;
3527 lsect->sym->root.u.def.value = 0x8000;
3528 return TRUE;
3529 }
3530
3531 static bfd_boolean
3532 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3533 {
3534 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3535 asection *s;
3536 flagword flags;
3537 int p2align;
3538
3539 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3540 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3541 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3542 htab->glink = s;
3543 p2align = htab->params->ppc476_workaround ? 6 : 4;
3544 if (p2align < htab->params->plt_stub_align)
3545 p2align = htab->params->plt_stub_align;
3546 if (s == NULL
3547 || !bfd_set_section_alignment (abfd, s, p2align))
3548 return FALSE;
3549
3550 if (!info->no_ld_generated_unwind_info)
3551 {
3552 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3553 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3554 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3555 htab->glink_eh_frame = s;
3556 if (s == NULL
3557 || !bfd_set_section_alignment (abfd, s, 2))
3558 return FALSE;
3559 }
3560
3561 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3562 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3563 htab->elf.iplt = s;
3564 if (s == NULL
3565 || !bfd_set_section_alignment (abfd, s, 4))
3566 return FALSE;
3567
3568 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3569 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3570 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3571 htab->elf.irelplt = s;
3572 if (s == NULL
3573 || ! bfd_set_section_alignment (abfd, s, 2))
3574 return FALSE;
3575
3576 /* Local plt entries. */
3577 flags = (SEC_ALLOC | SEC_LOAD
3578 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3579 htab->pltlocal = bfd_make_section_anyway_with_flags (abfd, ".branch_lt",
3580 flags);
3581 if (htab->pltlocal == NULL
3582 || ! bfd_set_section_alignment (abfd, htab->pltlocal, 2))
3583 return FALSE;
3584
3585 if (bfd_link_pic (info))
3586 {
3587 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3588 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3589 htab->relpltlocal
3590 = bfd_make_section_anyway_with_flags (abfd, ".rela.branch_lt", flags);
3591 if (htab->relpltlocal == NULL
3592 || ! bfd_set_section_alignment (abfd, htab->relpltlocal, 2))
3593 return FALSE;
3594 }
3595
3596 if (!ppc_elf_create_linker_section (abfd, info, 0,
3597 &htab->sdata[0]))
3598 return FALSE;
3599
3600 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3601 &htab->sdata[1]))
3602 return FALSE;
3603
3604 return TRUE;
3605 }
3606
3607 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3608 to output sections (just like _bfd_elf_create_dynamic_sections has
3609 to create .dynbss and .rela.bss). */
3610
3611 static bfd_boolean
3612 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3613 {
3614 struct ppc_elf_link_hash_table *htab;
3615 asection *s;
3616 flagword flags;
3617
3618 htab = ppc_elf_hash_table (info);
3619
3620 if (htab->elf.sgot == NULL
3621 && !ppc_elf_create_got (abfd, info))
3622 return FALSE;
3623
3624 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3625 return FALSE;
3626
3627 if (htab->glink == NULL
3628 && !ppc_elf_create_glink (abfd, info))
3629 return FALSE;
3630
3631 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3632 SEC_ALLOC | SEC_LINKER_CREATED);
3633 htab->dynsbss = s;
3634 if (s == NULL)
3635 return FALSE;
3636
3637 if (! bfd_link_pic (info))
3638 {
3639 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3640 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3641 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3642 htab->relsbss = s;
3643 if (s == NULL
3644 || ! bfd_set_section_alignment (abfd, s, 2))
3645 return FALSE;
3646 }
3647
3648 if (htab->is_vxworks
3649 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3650 return FALSE;
3651
3652 s = htab->elf.splt;
3653 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3654 if (htab->plt_type == PLT_VXWORKS)
3655 /* The VxWorks PLT is a loaded section with contents. */
3656 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3657 return bfd_set_section_flags (abfd, s, flags);
3658 }
3659
3660 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3661
3662 static void
3663 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3664 struct elf_link_hash_entry *dir,
3665 struct elf_link_hash_entry *ind)
3666 {
3667 struct ppc_elf_link_hash_entry *edir, *eind;
3668
3669 edir = (struct ppc_elf_link_hash_entry *) dir;
3670 eind = (struct ppc_elf_link_hash_entry *) ind;
3671
3672 edir->tls_mask |= eind->tls_mask;
3673 edir->has_sda_refs |= eind->has_sda_refs;
3674
3675 if (edir->elf.versioned != versioned_hidden)
3676 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3677 edir->elf.ref_regular |= eind->elf.ref_regular;
3678 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3679 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3680 edir->elf.needs_plt |= eind->elf.needs_plt;
3681 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3682
3683 /* If we were called to copy over info for a weak sym, that's all. */
3684 if (eind->elf.root.type != bfd_link_hash_indirect)
3685 return;
3686
3687 if (eind->dyn_relocs != NULL)
3688 {
3689 if (edir->dyn_relocs != NULL)
3690 {
3691 struct elf_dyn_relocs **pp;
3692 struct elf_dyn_relocs *p;
3693
3694 /* Add reloc counts against the indirect sym to the direct sym
3695 list. Merge any entries against the same section. */
3696 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3697 {
3698 struct elf_dyn_relocs *q;
3699
3700 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3701 if (q->sec == p->sec)
3702 {
3703 q->pc_count += p->pc_count;
3704 q->count += p->count;
3705 *pp = p->next;
3706 break;
3707 }
3708 if (q == NULL)
3709 pp = &p->next;
3710 }
3711 *pp = edir->dyn_relocs;
3712 }
3713
3714 edir->dyn_relocs = eind->dyn_relocs;
3715 eind->dyn_relocs = NULL;
3716 }
3717
3718 /* Copy over the GOT refcount entries that we may have already seen to
3719 the symbol which just became indirect. */
3720 edir->elf.got.refcount += eind->elf.got.refcount;
3721 eind->elf.got.refcount = 0;
3722
3723 /* And plt entries. */
3724 if (eind->elf.plt.plist != NULL)
3725 {
3726 if (edir->elf.plt.plist != NULL)
3727 {
3728 struct plt_entry **entp;
3729 struct plt_entry *ent;
3730
3731 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3732 {
3733 struct plt_entry *dent;
3734
3735 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3736 if (dent->sec == ent->sec && dent->addend == ent->addend)
3737 {
3738 dent->plt.refcount += ent->plt.refcount;
3739 *entp = ent->next;
3740 break;
3741 }
3742 if (dent == NULL)
3743 entp = &ent->next;
3744 }
3745 *entp = edir->elf.plt.plist;
3746 }
3747
3748 edir->elf.plt.plist = eind->elf.plt.plist;
3749 eind->elf.plt.plist = NULL;
3750 }
3751
3752 if (eind->elf.dynindx != -1)
3753 {
3754 if (edir->elf.dynindx != -1)
3755 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3756 edir->elf.dynstr_index);
3757 edir->elf.dynindx = eind->elf.dynindx;
3758 edir->elf.dynstr_index = eind->elf.dynstr_index;
3759 eind->elf.dynindx = -1;
3760 eind->elf.dynstr_index = 0;
3761 }
3762 }
3763
3764 /* Hook called by the linker routine which adds symbols from an object
3765 file. We use it to put .comm items in .sbss, and not .bss. */
3766
3767 static bfd_boolean
3768 ppc_elf_add_symbol_hook (bfd *abfd,
3769 struct bfd_link_info *info,
3770 Elf_Internal_Sym *sym,
3771 const char **namep ATTRIBUTE_UNUSED,
3772 flagword *flagsp ATTRIBUTE_UNUSED,
3773 asection **secp,
3774 bfd_vma *valp)
3775 {
3776 if (sym->st_shndx == SHN_COMMON
3777 && !bfd_link_relocatable (info)
3778 && is_ppc_elf (info->output_bfd)
3779 && sym->st_size <= elf_gp_size (abfd))
3780 {
3781 /* Common symbols less than or equal to -G nn bytes are automatically
3782 put into .sbss. */
3783 struct ppc_elf_link_hash_table *htab;
3784
3785 htab = ppc_elf_hash_table (info);
3786 if (htab->sbss == NULL)
3787 {
3788 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3789
3790 if (!htab->elf.dynobj)
3791 htab->elf.dynobj = abfd;
3792
3793 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3794 ".sbss",
3795 flags);
3796 if (htab->sbss == NULL)
3797 return FALSE;
3798 }
3799
3800 *secp = htab->sbss;
3801 *valp = sym->st_size;
3802 }
3803
3804 return TRUE;
3805 }
3806 \f
3807 /* Find a linker generated pointer with a given addend and type. */
3808
3809 static elf_linker_section_pointers_t *
3810 elf_find_pointer_linker_section
3811 (elf_linker_section_pointers_t *linker_pointers,
3812 bfd_vma addend,
3813 elf_linker_section_t *lsect)
3814 {
3815 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3816 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3817 return linker_pointers;
3818
3819 return NULL;
3820 }
3821
3822 /* Allocate a pointer to live in a linker created section. */
3823
3824 static bfd_boolean
3825 elf_allocate_pointer_linker_section (bfd *abfd,
3826 elf_linker_section_t *lsect,
3827 struct elf_link_hash_entry *h,
3828 const Elf_Internal_Rela *rel)
3829 {
3830 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3831 elf_linker_section_pointers_t *linker_section_ptr;
3832 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3833 bfd_size_type amt;
3834
3835 BFD_ASSERT (lsect != NULL);
3836
3837 /* Is this a global symbol? */
3838 if (h != NULL)
3839 {
3840 struct ppc_elf_link_hash_entry *eh;
3841
3842 /* Has this symbol already been allocated? If so, our work is done. */
3843 eh = (struct ppc_elf_link_hash_entry *) h;
3844 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3845 rel->r_addend,
3846 lsect))
3847 return TRUE;
3848
3849 ptr_linker_section_ptr = &eh->linker_section_pointer;
3850 }
3851 else
3852 {
3853 BFD_ASSERT (is_ppc_elf (abfd));
3854
3855 /* Allocation of a pointer to a local symbol. */
3856 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3857
3858 /* Allocate a table to hold the local symbols if first time. */
3859 if (!ptr)
3860 {
3861 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3862
3863 amt = num_symbols;
3864 amt *= sizeof (elf_linker_section_pointers_t *);
3865 ptr = bfd_zalloc (abfd, amt);
3866
3867 if (!ptr)
3868 return FALSE;
3869
3870 elf_local_ptr_offsets (abfd) = ptr;
3871 }
3872
3873 /* Has this symbol already been allocated? If so, our work is done. */
3874 if (elf_find_pointer_linker_section (ptr[r_symndx],
3875 rel->r_addend,
3876 lsect))
3877 return TRUE;
3878
3879 ptr_linker_section_ptr = &ptr[r_symndx];
3880 }
3881
3882 /* Allocate space for a pointer in the linker section, and allocate
3883 a new pointer record from internal memory. */
3884 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3885 amt = sizeof (elf_linker_section_pointers_t);
3886 linker_section_ptr = bfd_alloc (abfd, amt);
3887
3888 if (!linker_section_ptr)
3889 return FALSE;
3890
3891 linker_section_ptr->next = *ptr_linker_section_ptr;
3892 linker_section_ptr->addend = rel->r_addend;
3893 linker_section_ptr->lsect = lsect;
3894 *ptr_linker_section_ptr = linker_section_ptr;
3895
3896 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3897 return FALSE;
3898 linker_section_ptr->offset = lsect->section->size;
3899 lsect->section->size += 4;
3900
3901 #ifdef DEBUG
3902 fprintf (stderr,
3903 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3904 lsect->name, (long) linker_section_ptr->offset,
3905 (long) lsect->section->size);
3906 #endif
3907
3908 return TRUE;
3909 }
3910
3911 static struct plt_entry **
3912 update_local_sym_info (bfd *abfd,
3913 Elf_Internal_Shdr *symtab_hdr,
3914 unsigned long r_symndx,
3915 int tls_type)
3916 {
3917 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3918 struct plt_entry **local_plt;
3919 unsigned char *local_got_tls_masks;
3920
3921 if (local_got_refcounts == NULL)
3922 {
3923 bfd_size_type size = symtab_hdr->sh_info;
3924
3925 size *= (sizeof (*local_got_refcounts)
3926 + sizeof (*local_plt)
3927 + sizeof (*local_got_tls_masks));
3928 local_got_refcounts = bfd_zalloc (abfd, size);
3929 if (local_got_refcounts == NULL)
3930 return NULL;
3931 elf_local_got_refcounts (abfd) = local_got_refcounts;
3932 }
3933
3934 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3935 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
3936 local_got_tls_masks[r_symndx] |= tls_type & 0xff;
3937 if ((tls_type & NON_GOT) == 0)
3938 local_got_refcounts[r_symndx] += 1;
3939 return local_plt + r_symndx;
3940 }
3941
3942 static bfd_boolean
3943 update_plt_info (bfd *abfd, struct plt_entry **plist,
3944 asection *sec, bfd_vma addend)
3945 {
3946 struct plt_entry *ent;
3947
3948 if (addend < 32768)
3949 sec = NULL;
3950 for (ent = *plist; ent != NULL; ent = ent->next)
3951 if (ent->sec == sec && ent->addend == addend)
3952 break;
3953 if (ent == NULL)
3954 {
3955 bfd_size_type amt = sizeof (*ent);
3956 ent = bfd_alloc (abfd, amt);
3957 if (ent == NULL)
3958 return FALSE;
3959 ent->next = *plist;
3960 ent->sec = sec;
3961 ent->addend = addend;
3962 ent->plt.refcount = 0;
3963 *plist = ent;
3964 }
3965 ent->plt.refcount += 1;
3966 return TRUE;
3967 }
3968
3969 static struct plt_entry *
3970 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3971 {
3972 struct plt_entry *ent;
3973
3974 if (addend < 32768)
3975 sec = NULL;
3976 for (ent = *plist; ent != NULL; ent = ent->next)
3977 if (ent->sec == sec && ent->addend == addend)
3978 break;
3979 return ent;
3980 }
3981
3982 static bfd_boolean
3983 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3984 {
3985 return (r_type == R_PPC_PLTREL24
3986 || r_type == R_PPC_LOCAL24PC
3987 || r_type == R_PPC_REL24
3988 || r_type == R_PPC_REL14
3989 || r_type == R_PPC_REL14_BRTAKEN
3990 || r_type == R_PPC_REL14_BRNTAKEN
3991 || r_type == R_PPC_ADDR24
3992 || r_type == R_PPC_ADDR14
3993 || r_type == R_PPC_ADDR14_BRTAKEN
3994 || r_type == R_PPC_ADDR14_BRNTAKEN
3995 || r_type == R_PPC_VLE_REL24);
3996 }
3997
3998 /* Relocs on inline plt call sequence insns prior to the call. */
3999
4000 static bfd_boolean
4001 is_plt_seq_reloc (enum elf_ppc_reloc_type r_type)
4002 {
4003 return (r_type == R_PPC_PLT16_HA
4004 || r_type == R_PPC_PLT16_HI
4005 || r_type == R_PPC_PLT16_LO
4006 || r_type == R_PPC_PLTSEQ);
4007 }
4008
4009 static void
4010 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
4011 {
4012 _bfd_error_handler
4013 /* xgettext:c-format */
4014 (_("%pB: relocation %s cannot be used when making a shared object"),
4015 abfd,
4016 ppc_elf_howto_table[r_type]->name);
4017 bfd_set_error (bfd_error_bad_value);
4018 }
4019
4020 /* Look through the relocs for a section during the first phase, and
4021 allocate space in the global offset table or procedure linkage
4022 table. */
4023
4024 static bfd_boolean
4025 ppc_elf_check_relocs (bfd *abfd,
4026 struct bfd_link_info *info,
4027 asection *sec,
4028 const Elf_Internal_Rela *relocs)
4029 {
4030 struct ppc_elf_link_hash_table *htab;
4031 Elf_Internal_Shdr *symtab_hdr;
4032 struct elf_link_hash_entry **sym_hashes;
4033 const Elf_Internal_Rela *rel;
4034 const Elf_Internal_Rela *rel_end;
4035 asection *got2, *sreloc;
4036 struct elf_link_hash_entry *tga;
4037
4038 if (bfd_link_relocatable (info))
4039 return TRUE;
4040
4041 /* Don't do anything special with non-loaded, non-alloced sections.
4042 In particular, any relocs in such sections should not affect GOT
4043 and PLT reference counting (ie. we don't allow them to create GOT
4044 or PLT entries), there's no possibility or desire to optimize TLS
4045 relocs, and there's not much point in propagating relocs to shared
4046 libs that the dynamic linker won't relocate. */
4047 if ((sec->flags & SEC_ALLOC) == 0)
4048 return TRUE;
4049
4050 #ifdef DEBUG
4051 _bfd_error_handler ("ppc_elf_check_relocs called for section %pA in %pB",
4052 sec, abfd);
4053 #endif
4054
4055 BFD_ASSERT (is_ppc_elf (abfd));
4056
4057 /* Initialize howto table if not already done. */
4058 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4059 ppc_elf_howto_init ();
4060
4061 htab = ppc_elf_hash_table (info);
4062 if (htab->glink == NULL)
4063 {
4064 if (htab->elf.dynobj == NULL)
4065 htab->elf.dynobj = abfd;
4066 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4067 return FALSE;
4068 }
4069 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4070 FALSE, FALSE, TRUE);
4071 symtab_hdr = &elf_symtab_hdr (abfd);
4072 sym_hashes = elf_sym_hashes (abfd);
4073 got2 = bfd_get_section_by_name (abfd, ".got2");
4074 sreloc = NULL;
4075
4076 rel_end = relocs + sec->reloc_count;
4077 for (rel = relocs; rel < rel_end; rel++)
4078 {
4079 unsigned long r_symndx;
4080 enum elf_ppc_reloc_type r_type;
4081 struct elf_link_hash_entry *h;
4082 int tls_type;
4083 struct plt_entry **ifunc;
4084 struct plt_entry **pltent;
4085 bfd_vma addend;
4086
4087 r_symndx = ELF32_R_SYM (rel->r_info);
4088 if (r_symndx < symtab_hdr->sh_info)
4089 h = NULL;
4090 else
4091 {
4092 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4093 while (h->root.type == bfd_link_hash_indirect
4094 || h->root.type == bfd_link_hash_warning)
4095 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4096 }
4097
4098 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4099 This shows up in particular in an R_PPC_ADDR32 in the eabi
4100 startup code. */
4101 if (h != NULL
4102 && htab->elf.sgot == NULL
4103 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4104 {
4105 if (htab->elf.dynobj == NULL)
4106 htab->elf.dynobj = abfd;
4107 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4108 return FALSE;
4109 BFD_ASSERT (h == htab->elf.hgot);
4110 }
4111
4112 tls_type = 0;
4113 r_type = ELF32_R_TYPE (rel->r_info);
4114 ifunc = NULL;
4115 if (h == NULL && !htab->is_vxworks)
4116 {
4117 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4118 abfd, r_symndx);
4119 if (isym == NULL)
4120 return FALSE;
4121
4122 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4123 {
4124 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4125 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4126 NON_GOT | PLT_IFUNC);
4127 if (ifunc == NULL)
4128 return FALSE;
4129
4130 /* STT_GNU_IFUNC symbols must have a PLT entry;
4131 In a non-pie executable even when there are
4132 no plt calls. */
4133 if (!bfd_link_pic (info)
4134 || is_branch_reloc (r_type)
4135 || r_type == R_PPC_PLT16_LO
4136 || r_type == R_PPC_PLT16_HI
4137 || r_type == R_PPC_PLT16_HA)
4138 {
4139 addend = 0;
4140 if (r_type == R_PPC_PLTREL24)
4141 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4142 if (bfd_link_pic (info)
4143 && (r_type == R_PPC_PLTREL24
4144 || r_type == R_PPC_PLT16_LO
4145 || r_type == R_PPC_PLT16_HI
4146 || r_type == R_PPC_PLT16_HA))
4147 addend = rel->r_addend;
4148 if (!update_plt_info (abfd, ifunc, got2, addend))
4149 return FALSE;
4150 }
4151 }
4152 }
4153
4154 if (!htab->is_vxworks
4155 && is_branch_reloc (r_type)
4156 && h != NULL
4157 && h == tga)
4158 {
4159 if (rel != relocs
4160 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4161 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4162 /* We have a new-style __tls_get_addr call with a marker
4163 reloc. */
4164 ;
4165 else
4166 /* Mark this section as having an old-style call. */
4167 sec->has_tls_get_addr_call = 1;
4168 }
4169
4170 switch (r_type)
4171 {
4172 case R_PPC_TLSGD:
4173 case R_PPC_TLSLD:
4174 /* These special tls relocs tie a call to __tls_get_addr with
4175 its parameter symbol. */
4176 if (h != NULL)
4177 ppc_elf_hash_entry (h)->tls_mask |= TLS_TLS | TLS_MARK;
4178 else
4179 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4180 NON_GOT | TLS_TLS | TLS_MARK))
4181 return FALSE;
4182 break;
4183
4184 case R_PPC_PLTSEQ:
4185 break;
4186
4187 case R_PPC_GOT_TLSLD16:
4188 case R_PPC_GOT_TLSLD16_LO:
4189 case R_PPC_GOT_TLSLD16_HI:
4190 case R_PPC_GOT_TLSLD16_HA:
4191 tls_type = TLS_TLS | TLS_LD;
4192 goto dogottls;
4193
4194 case R_PPC_GOT_TLSGD16:
4195 case R_PPC_GOT_TLSGD16_LO:
4196 case R_PPC_GOT_TLSGD16_HI:
4197 case R_PPC_GOT_TLSGD16_HA:
4198 tls_type = TLS_TLS | TLS_GD;
4199 goto dogottls;
4200
4201 case R_PPC_GOT_TPREL16:
4202 case R_PPC_GOT_TPREL16_LO:
4203 case R_PPC_GOT_TPREL16_HI:
4204 case R_PPC_GOT_TPREL16_HA:
4205 if (bfd_link_dll (info))
4206 info->flags |= DF_STATIC_TLS;
4207 tls_type = TLS_TLS | TLS_TPREL;
4208 goto dogottls;
4209
4210 case R_PPC_GOT_DTPREL16:
4211 case R_PPC_GOT_DTPREL16_LO:
4212 case R_PPC_GOT_DTPREL16_HI:
4213 case R_PPC_GOT_DTPREL16_HA:
4214 tls_type = TLS_TLS | TLS_DTPREL;
4215 dogottls:
4216 sec->has_tls_reloc = 1;
4217 /* Fall through. */
4218
4219 /* GOT16 relocations */
4220 case R_PPC_GOT16:
4221 case R_PPC_GOT16_LO:
4222 case R_PPC_GOT16_HI:
4223 case R_PPC_GOT16_HA:
4224 /* This symbol requires a global offset table entry. */
4225 if (htab->elf.sgot == NULL)
4226 {
4227 if (htab->elf.dynobj == NULL)
4228 htab->elf.dynobj = abfd;
4229 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4230 return FALSE;
4231 }
4232 if (h != NULL)
4233 {
4234 h->got.refcount += 1;
4235 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4236 }
4237 else
4238 /* This is a global offset table entry for a local symbol. */
4239 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4240 return FALSE;
4241
4242 /* We may also need a plt entry if the symbol turns out to be
4243 an ifunc. */
4244 if (h != NULL && !bfd_link_pic (info))
4245 {
4246 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4247 return FALSE;
4248 }
4249 break;
4250
4251 /* Indirect .sdata relocation. */
4252 case R_PPC_EMB_SDAI16:
4253 if (bfd_link_pic (info))
4254 {
4255 bad_shared_reloc (abfd, r_type);
4256 return FALSE;
4257 }
4258 htab->sdata[0].sym->ref_regular = 1;
4259 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4260 h, rel))
4261 return FALSE;
4262 if (h != NULL)
4263 {
4264 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4265 h->non_got_ref = TRUE;
4266 }
4267 break;
4268
4269 /* Indirect .sdata2 relocation. */
4270 case R_PPC_EMB_SDA2I16:
4271 if (bfd_link_pic (info))
4272 {
4273 bad_shared_reloc (abfd, r_type);
4274 return FALSE;
4275 }
4276 htab->sdata[1].sym->ref_regular = 1;
4277 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4278 h, rel))
4279 return FALSE;
4280 if (h != NULL)
4281 {
4282 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4283 h->non_got_ref = TRUE;
4284 }
4285 break;
4286
4287 case R_PPC_SDAREL16:
4288 htab->sdata[0].sym->ref_regular = 1;
4289 /* Fall through. */
4290
4291 case R_PPC_VLE_SDAREL_LO16A:
4292 case R_PPC_VLE_SDAREL_LO16D:
4293 case R_PPC_VLE_SDAREL_HI16A:
4294 case R_PPC_VLE_SDAREL_HI16D:
4295 case R_PPC_VLE_SDAREL_HA16A:
4296 case R_PPC_VLE_SDAREL_HA16D:
4297 if (h != NULL)
4298 {
4299 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4300 h->non_got_ref = TRUE;
4301 }
4302 break;
4303
4304 case R_PPC_VLE_REL8:
4305 case R_PPC_VLE_REL15:
4306 case R_PPC_VLE_REL24:
4307 case R_PPC_VLE_LO16A:
4308 case R_PPC_VLE_LO16D:
4309 case R_PPC_VLE_HI16A:
4310 case R_PPC_VLE_HI16D:
4311 case R_PPC_VLE_HA16A:
4312 case R_PPC_VLE_HA16D:
4313 case R_PPC_VLE_ADDR20:
4314 break;
4315
4316 case R_PPC_EMB_SDA2REL:
4317 if (bfd_link_pic (info))
4318 {
4319 bad_shared_reloc (abfd, r_type);
4320 return FALSE;
4321 }
4322 htab->sdata[1].sym->ref_regular = 1;
4323 if (h != NULL)
4324 {
4325 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4326 h->non_got_ref = TRUE;
4327 }
4328 break;
4329
4330 case R_PPC_VLE_SDA21_LO:
4331 case R_PPC_VLE_SDA21:
4332 case R_PPC_EMB_SDA21:
4333 case R_PPC_EMB_RELSDA:
4334 if (bfd_link_pic (info))
4335 {
4336 bad_shared_reloc (abfd, r_type);
4337 return FALSE;
4338 }
4339 if (h != NULL)
4340 {
4341 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4342 h->non_got_ref = TRUE;
4343 }
4344 break;
4345
4346 case R_PPC_EMB_NADDR32:
4347 case R_PPC_EMB_NADDR16:
4348 case R_PPC_EMB_NADDR16_LO:
4349 case R_PPC_EMB_NADDR16_HI:
4350 case R_PPC_EMB_NADDR16_HA:
4351 if (bfd_link_pic (info))
4352 {
4353 bad_shared_reloc (abfd, r_type);
4354 return FALSE;
4355 }
4356 if (h != NULL)
4357 h->non_got_ref = TRUE;
4358 break;
4359
4360 case R_PPC_PLTREL24:
4361 if (h == NULL)
4362 break;
4363 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4364 goto pltentry;
4365
4366 case R_PPC_PLTCALL:
4367 sec->has_pltcall = 1;
4368 /* Fall through. */
4369
4370 case R_PPC_PLT32:
4371 case R_PPC_PLTREL32:
4372 case R_PPC_PLT16_LO:
4373 case R_PPC_PLT16_HI:
4374 case R_PPC_PLT16_HA:
4375 pltentry:
4376 #ifdef DEBUG
4377 fprintf (stderr, "Reloc requires a PLT entry\n");
4378 #endif
4379 /* This symbol requires a procedure linkage table entry. */
4380 if (h == NULL)
4381 {
4382 pltent = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4383 NON_GOT | PLT_KEEP);
4384 if (pltent == NULL)
4385 return FALSE;
4386 }
4387 else
4388 {
4389 if (r_type != R_PPC_PLTREL24)
4390 ppc_elf_hash_entry (h)->tls_mask |= PLT_KEEP;
4391 h->needs_plt = 1;
4392 pltent = &h->plt.plist;
4393 }
4394 addend = 0;
4395 if (bfd_link_pic (info)
4396 && (r_type == R_PPC_PLTREL24
4397 || r_type == R_PPC_PLT16_LO
4398 || r_type == R_PPC_PLT16_HI
4399 || r_type == R_PPC_PLT16_HA))
4400 addend = rel->r_addend;
4401 if (!update_plt_info (abfd, pltent, got2, addend))
4402 return FALSE;
4403 break;
4404
4405 /* The following relocations don't need to propagate the
4406 relocation if linking a shared object since they are
4407 section relative. */
4408 case R_PPC_SECTOFF:
4409 case R_PPC_SECTOFF_LO:
4410 case R_PPC_SECTOFF_HI:
4411 case R_PPC_SECTOFF_HA:
4412 case R_PPC_DTPREL16:
4413 case R_PPC_DTPREL16_LO:
4414 case R_PPC_DTPREL16_HI:
4415 case R_PPC_DTPREL16_HA:
4416 case R_PPC_TOC16:
4417 break;
4418
4419 case R_PPC_REL16:
4420 case R_PPC_REL16_LO:
4421 case R_PPC_REL16_HI:
4422 case R_PPC_REL16_HA:
4423 case R_PPC_REL16DX_HA:
4424 ppc_elf_tdata (abfd)->has_rel16 = 1;
4425 break;
4426
4427 /* These are just markers. */
4428 case R_PPC_TLS:
4429 case R_PPC_EMB_MRKREF:
4430 case R_PPC_NONE:
4431 case R_PPC_max:
4432 case R_PPC_RELAX:
4433 case R_PPC_RELAX_PLT:
4434 case R_PPC_RELAX_PLTREL24:
4435 case R_PPC_16DX_HA:
4436 break;
4437
4438 /* These should only appear in dynamic objects. */
4439 case R_PPC_COPY:
4440 case R_PPC_GLOB_DAT:
4441 case R_PPC_JMP_SLOT:
4442 case R_PPC_RELATIVE:
4443 case R_PPC_IRELATIVE:
4444 break;
4445
4446 /* These aren't handled yet. We'll report an error later. */
4447 case R_PPC_ADDR30:
4448 case R_PPC_EMB_RELSEC16:
4449 case R_PPC_EMB_RELST_LO:
4450 case R_PPC_EMB_RELST_HI:
4451 case R_PPC_EMB_RELST_HA:
4452 case R_PPC_EMB_BIT_FLD:
4453 break;
4454
4455 /* This refers only to functions defined in the shared library. */
4456 case R_PPC_LOCAL24PC:
4457 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4458 {
4459 htab->plt_type = PLT_OLD;
4460 htab->old_bfd = abfd;
4461 }
4462 if (h != NULL && h->type == STT_GNU_IFUNC)
4463 {
4464 h->needs_plt = 1;
4465 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4466 return FALSE;
4467 }
4468 break;
4469
4470 /* This relocation describes the C++ object vtable hierarchy.
4471 Reconstruct it for later use during GC. */
4472 case R_PPC_GNU_VTINHERIT:
4473 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4474 return FALSE;
4475 break;
4476
4477 /* This relocation describes which C++ vtable entries are actually
4478 used. Record for later use during GC. */
4479 case R_PPC_GNU_VTENTRY:
4480 BFD_ASSERT (h != NULL);
4481 if (h != NULL
4482 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4483 return FALSE;
4484 break;
4485
4486 /* We shouldn't really be seeing TPREL32. */
4487 case R_PPC_TPREL32:
4488 case R_PPC_TPREL16:
4489 case R_PPC_TPREL16_LO:
4490 case R_PPC_TPREL16_HI:
4491 case R_PPC_TPREL16_HA:
4492 if (bfd_link_dll (info))
4493 info->flags |= DF_STATIC_TLS;
4494 goto dodyn;
4495
4496 /* Nor these. */
4497 case R_PPC_DTPMOD32:
4498 case R_PPC_DTPREL32:
4499 goto dodyn;
4500
4501 case R_PPC_REL32:
4502 if (h == NULL
4503 && got2 != NULL
4504 && (sec->flags & SEC_CODE) != 0
4505 && bfd_link_pic (info)
4506 && htab->plt_type == PLT_UNSET)
4507 {
4508 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4509 the start of a function, which assembles to a REL32
4510 reference to .got2. If we detect one of these, then
4511 force the old PLT layout because the linker cannot
4512 reliably deduce the GOT pointer value needed for
4513 PLT call stubs. */
4514 asection *s;
4515 Elf_Internal_Sym *isym;
4516
4517 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4518 abfd, r_symndx);
4519 if (isym == NULL)
4520 return FALSE;
4521
4522 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4523 if (s == got2)
4524 {
4525 htab->plt_type = PLT_OLD;
4526 htab->old_bfd = abfd;
4527 }
4528 }
4529 if (h == NULL || h == htab->elf.hgot)
4530 break;
4531 /* fall through */
4532
4533 case R_PPC_ADDR32:
4534 case R_PPC_ADDR16:
4535 case R_PPC_ADDR16_LO:
4536 case R_PPC_ADDR16_HI:
4537 case R_PPC_ADDR16_HA:
4538 case R_PPC_UADDR32:
4539 case R_PPC_UADDR16:
4540 if (h != NULL && !bfd_link_pic (info))
4541 {
4542 /* We may need a plt entry if the symbol turns out to be
4543 a function defined in a dynamic object. */
4544 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4545 return FALSE;
4546
4547 /* We may need a copy reloc too. */
4548 h->non_got_ref = 1;
4549 h->pointer_equality_needed = 1;
4550 if (r_type == R_PPC_ADDR16_HA)
4551 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4552 if (r_type == R_PPC_ADDR16_LO)
4553 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4554 }
4555 goto dodyn;
4556
4557 case R_PPC_REL24:
4558 case R_PPC_REL14:
4559 case R_PPC_REL14_BRTAKEN:
4560 case R_PPC_REL14_BRNTAKEN:
4561 if (h == NULL)
4562 break;
4563 if (h == htab->elf.hgot)
4564 {
4565 if (htab->plt_type == PLT_UNSET)
4566 {
4567 htab->plt_type = PLT_OLD;
4568 htab->old_bfd = abfd;
4569 }
4570 break;
4571 }
4572 /* fall through */
4573
4574 case R_PPC_ADDR24:
4575 case R_PPC_ADDR14:
4576 case R_PPC_ADDR14_BRTAKEN:
4577 case R_PPC_ADDR14_BRNTAKEN:
4578 if (h != NULL && !bfd_link_pic (info))
4579 {
4580 /* We may need a plt entry if the symbol turns out to be
4581 a function defined in a dynamic object. */
4582 h->needs_plt = 1;
4583 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4584 return FALSE;
4585 break;
4586 }
4587
4588 dodyn:
4589 /* If we are creating a shared library, and this is a reloc
4590 against a global symbol, or a non PC relative reloc
4591 against a local symbol, then we need to copy the reloc
4592 into the shared library. However, if we are linking with
4593 -Bsymbolic, we do not need to copy a reloc against a
4594 global symbol which is defined in an object we are
4595 including in the link (i.e., DEF_REGULAR is set). At
4596 this point we have not seen all the input files, so it is
4597 possible that DEF_REGULAR is not set now but will be set
4598 later (it is never cleared). In case of a weak definition,
4599 DEF_REGULAR may be cleared later by a strong definition in
4600 a shared library. We account for that possibility below by
4601 storing information in the dyn_relocs field of the hash
4602 table entry. A similar situation occurs when creating
4603 shared libraries and symbol visibility changes render the
4604 symbol local.
4605
4606 If on the other hand, we are creating an executable, we
4607 may need to keep relocations for symbols satisfied by a
4608 dynamic library if we manage to avoid copy relocs for the
4609 symbol. */
4610 if ((bfd_link_pic (info)
4611 && (must_be_dyn_reloc (info, r_type)
4612 || (h != NULL
4613 && (!SYMBOLIC_BIND (info, h)
4614 || h->root.type == bfd_link_hash_defweak
4615 || !h->def_regular))))
4616 || (ELIMINATE_COPY_RELOCS
4617 && !bfd_link_pic (info)
4618 && h != NULL
4619 && (h->root.type == bfd_link_hash_defweak
4620 || !h->def_regular)))
4621 {
4622 #ifdef DEBUG
4623 fprintf (stderr,
4624 "ppc_elf_check_relocs needs to "
4625 "create relocation for %s\n",
4626 (h && h->root.root.string
4627 ? h->root.root.string : "<unknown>"));
4628 #endif
4629 if (sreloc == NULL)
4630 {
4631 if (htab->elf.dynobj == NULL)
4632 htab->elf.dynobj = abfd;
4633
4634 sreloc = _bfd_elf_make_dynamic_reloc_section
4635 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4636
4637 if (sreloc == NULL)
4638 return FALSE;
4639 }
4640
4641 /* If this is a global symbol, we count the number of
4642 relocations we need for this symbol. */
4643 if (h != NULL)
4644 {
4645 struct elf_dyn_relocs *p;
4646 struct elf_dyn_relocs **rel_head;
4647
4648 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4649 p = *rel_head;
4650 if (p == NULL || p->sec != sec)
4651 {
4652 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4653 if (p == NULL)
4654 return FALSE;
4655 p->next = *rel_head;
4656 *rel_head = p;
4657 p->sec = sec;
4658 p->count = 0;
4659 p->pc_count = 0;
4660 }
4661 p->count += 1;
4662 if (!must_be_dyn_reloc (info, r_type))
4663 p->pc_count += 1;
4664 }
4665 else
4666 {
4667 /* Track dynamic relocs needed for local syms too.
4668 We really need local syms available to do this
4669 easily. Oh well. */
4670 struct ppc_dyn_relocs *p;
4671 struct ppc_dyn_relocs **rel_head;
4672 bfd_boolean is_ifunc;
4673 asection *s;
4674 void *vpp;
4675 Elf_Internal_Sym *isym;
4676
4677 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4678 abfd, r_symndx);
4679 if (isym == NULL)
4680 return FALSE;
4681
4682 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4683 if (s == NULL)
4684 s = sec;
4685
4686 vpp = &elf_section_data (s)->local_dynrel;
4687 rel_head = (struct ppc_dyn_relocs **) vpp;
4688 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4689 p = *rel_head;
4690 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4691 p = p->next;
4692 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4693 {
4694 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4695 if (p == NULL)
4696 return FALSE;
4697 p->next = *rel_head;
4698 *rel_head = p;
4699 p->sec = sec;
4700 p->ifunc = is_ifunc;
4701 p->count = 0;
4702 }
4703 p->count += 1;
4704 }
4705 }
4706
4707 break;
4708 }
4709 }
4710
4711 return TRUE;
4712 }
4713 \f
4714 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4715 and OBFD, and merge non-conflicting ones. */
4716 void
4717 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4718 {
4719 bfd *obfd = info->output_bfd;
4720 obj_attribute *in_attr, *in_attrs;
4721 obj_attribute *out_attr, *out_attrs;
4722
4723 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4724 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4725
4726 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4727 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4728
4729 if (in_attr->i != out_attr->i)
4730 {
4731 int in_fp = in_attr->i & 3;
4732 int out_fp = out_attr->i & 3;
4733
4734 if (in_fp == 0)
4735 ;
4736 else if (out_fp == 0)
4737 {
4738 out_attr->type = 1;
4739 out_attr->i ^= in_fp;
4740 }
4741 else if (out_fp != 2 && in_fp == 2)
4742 _bfd_error_handler
4743 /* xgettext:c-format */
4744 (_("warning: %pB uses hard float, %pB uses soft float"), obfd, ibfd);
4745 else if (out_fp == 2 && in_fp != 2)
4746 _bfd_error_handler
4747 /* xgettext:c-format */
4748 (_("warning: %pB uses hard float, %pB uses soft float"), ibfd, obfd);
4749 else if (out_fp == 1 && in_fp == 3)
4750 _bfd_error_handler
4751 /* xgettext:c-format */
4752 (_("warning: %pB uses double-precision hard float, "
4753 "%pB uses single-precision hard float"), obfd, ibfd);
4754 else if (out_fp == 3 && in_fp == 1)
4755 _bfd_error_handler
4756 /* xgettext:c-format */
4757 (_("warning: %pB uses double-precision hard float, "
4758 "%pB uses single-precision hard float"), ibfd, obfd);
4759
4760 in_fp = in_attr->i & 0xc;
4761 out_fp = out_attr->i & 0xc;
4762 if (in_fp == 0)
4763 ;
4764 else if (out_fp == 0)
4765 {
4766 out_attr->type = 1;
4767 out_attr->i ^= in_fp;
4768 }
4769 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4770 _bfd_error_handler
4771 /* xgettext:c-format */
4772 (_("warning: %pB uses 64-bit long double, "
4773 "%pB uses 128-bit long double"), ibfd, obfd);
4774 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4775 _bfd_error_handler
4776 /* xgettext:c-format */
4777 (_("warning: %pB uses 64-bit long double, "
4778 "%pB uses 128-bit long double"), obfd, ibfd);
4779 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4780 _bfd_error_handler
4781 /* xgettext:c-format */
4782 (_("warning: %pB uses IBM long double, "
4783 "%pB uses IEEE long double"), obfd, ibfd);
4784 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4785 _bfd_error_handler
4786 /* xgettext:c-format */
4787 (_("warning: %pB uses IBM long double, "
4788 "%pB uses IEEE long double"), ibfd, obfd);
4789 }
4790 }
4791
4792 /* Merge object attributes from IBFD into OBFD. Warn if
4793 there are conflicting attributes. */
4794 static bfd_boolean
4795 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4796 {
4797 bfd *obfd;
4798 obj_attribute *in_attr, *in_attrs;
4799 obj_attribute *out_attr, *out_attrs;
4800
4801 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4802
4803 obfd = info->output_bfd;
4804 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4805 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4806
4807 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4808 merge non-conflicting ones. */
4809 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4810 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4811 if (in_attr->i != out_attr->i)
4812 {
4813 int in_vec = in_attr->i & 3;
4814 int out_vec = out_attr->i & 3;
4815
4816 if (in_vec == 0)
4817 ;
4818 else if (out_vec == 0)
4819 {
4820 out_attr->type = 1;
4821 out_attr->i = in_vec;
4822 }
4823 /* For now, allow generic to transition to AltiVec or SPE
4824 without a warning. If GCC marked files with their stack
4825 alignment and used don't-care markings for files which are
4826 not affected by the vector ABI, we could warn about this
4827 case too. */
4828 else if (in_vec == 1)
4829 ;
4830 else if (out_vec == 1)
4831 {
4832 out_attr->type = 1;
4833 out_attr->i = in_vec;
4834 }
4835 else if (out_vec < in_vec)
4836 _bfd_error_handler
4837 /* xgettext:c-format */
4838 (_("warning: %pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
4839 obfd, ibfd);
4840 else if (out_vec > in_vec)
4841 _bfd_error_handler
4842 /* xgettext:c-format */
4843 (_("warning: %pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
4844 ibfd, obfd);
4845 }
4846
4847 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4848 and merge non-conflicting ones. */
4849 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4850 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4851 if (in_attr->i != out_attr->i)
4852 {
4853 int in_struct = in_attr->i & 3;
4854 int out_struct = out_attr->i & 3;
4855
4856 if (in_struct == 0 || in_struct == 3)
4857 ;
4858 else if (out_struct == 0)
4859 {
4860 out_attr->type = 1;
4861 out_attr->i = in_struct;
4862 }
4863 else if (out_struct < in_struct)
4864 _bfd_error_handler
4865 /* xgettext:c-format */
4866 (_("warning: %pB uses r3/r4 for small structure returns, "
4867 "%pB uses memory"), obfd, ibfd);
4868 else if (out_struct > in_struct)
4869 _bfd_error_handler
4870 /* xgettext:c-format */
4871 (_("warning: %pB uses r3/r4 for small structure returns, "
4872 "%pB uses memory"), ibfd, obfd);
4873 }
4874
4875 /* Merge Tag_compatibility attributes and any common GNU ones. */
4876 _bfd_elf_merge_object_attributes (ibfd, info);
4877
4878 return TRUE;
4879 }
4880
4881 /* Merge backend specific data from an object file to the output
4882 object file when linking. */
4883
4884 static bfd_boolean
4885 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4886 {
4887 bfd *obfd = info->output_bfd;
4888 flagword old_flags;
4889 flagword new_flags;
4890 bfd_boolean error;
4891
4892 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4893 return TRUE;
4894
4895 /* Check if we have the same endianness. */
4896 if (! _bfd_generic_verify_endian_match (ibfd, info))
4897 return FALSE;
4898
4899 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4900 return FALSE;
4901
4902 new_flags = elf_elfheader (ibfd)->e_flags;
4903 old_flags = elf_elfheader (obfd)->e_flags;
4904 if (!elf_flags_init (obfd))
4905 {
4906 /* First call, no flags set. */
4907 elf_flags_init (obfd) = TRUE;
4908 elf_elfheader (obfd)->e_flags = new_flags;
4909 }
4910
4911 /* Compatible flags are ok. */
4912 else if (new_flags == old_flags)
4913 ;
4914
4915 /* Incompatible flags. */
4916 else
4917 {
4918 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4919 to be linked with either. */
4920 error = FALSE;
4921 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4922 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4923 {
4924 error = TRUE;
4925 _bfd_error_handler
4926 (_("%pB: compiled with -mrelocatable and linked with "
4927 "modules compiled normally"), ibfd);
4928 }
4929 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4930 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4931 {
4932 error = TRUE;
4933 _bfd_error_handler
4934 (_("%pB: compiled normally and linked with "
4935 "modules compiled with -mrelocatable"), ibfd);
4936 }
4937
4938 /* The output is -mrelocatable-lib iff both the input files are. */
4939 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4940 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4941
4942 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4943 but each input file is either -mrelocatable or -mrelocatable-lib. */
4944 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4945 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4946 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4947 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4948
4949 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4950 any module uses it. */
4951 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4952
4953 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4954 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4955
4956 /* Warn about any other mismatches. */
4957 if (new_flags != old_flags)
4958 {
4959 error = TRUE;
4960 _bfd_error_handler
4961 /* xgettext:c-format */
4962 (_("%pB: uses different e_flags (%#x) fields "
4963 "than previous modules (%#x)"),
4964 ibfd, new_flags, old_flags);
4965 }
4966
4967 if (error)
4968 {
4969 bfd_set_error (bfd_error_bad_value);
4970 return FALSE;
4971 }
4972 }
4973
4974 return TRUE;
4975 }
4976
4977 static void
4978 ppc_elf_vle_split16 (bfd *input_bfd,
4979 asection *input_section,
4980 unsigned long offset,
4981 bfd_byte *loc,
4982 bfd_vma value,
4983 split16_format_type split16_format,
4984 bfd_boolean fixup)
4985 {
4986 unsigned int insn, opcode, top5;
4987
4988 insn = bfd_get_32 (input_bfd, loc);
4989 opcode = insn & 0xfc00f800;
4990 if (opcode == E_OR2I_INSN
4991 || opcode == E_AND2I_DOT_INSN
4992 || opcode == E_OR2IS_INSN
4993 || opcode == E_LIS_INSN
4994 || opcode == E_AND2IS_DOT_INSN)
4995 {
4996 if (split16_format != split16a_type)
4997 {
4998 if (fixup)
4999 split16_format = split16a_type;
5000 else
5001 _bfd_error_handler
5002 /* xgettext:c-format */
5003 (_("%pB(%pA+0x%lx): expected 16A style relocation on 0x%08x insn"),
5004 input_bfd, input_section, offset, opcode);
5005 }
5006 }
5007 else if (opcode == E_ADD2I_DOT_INSN
5008 || opcode == E_ADD2IS_INSN
5009 || opcode == E_CMP16I_INSN
5010 || opcode == E_MULL2I_INSN
5011 || opcode == E_CMPL16I_INSN
5012 || opcode == E_CMPH16I_INSN
5013 || opcode == E_CMPHL16I_INSN)
5014 {
5015 if (split16_format != split16d_type)
5016 {
5017 if (fixup)
5018 split16_format = split16d_type;
5019 else
5020 _bfd_error_handler
5021 /* xgettext:c-format */
5022 (_("%pB(%pA+0x%lx): expected 16D style relocation on 0x%08x insn"),
5023 input_bfd, input_section, offset, opcode);
5024 }
5025 }
5026 top5 = value & 0xf800;
5027 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
5028 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
5029 insn |= top5;
5030 insn |= value & 0x7ff;
5031 bfd_put_32 (input_bfd, insn, loc);
5032 }
5033
5034 static void
5035 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
5036 {
5037 unsigned int insn;
5038
5039 insn = bfd_get_32 (output_bfd, loc);
5040 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
5041 /* Top 4 bits of value to 17..20. */
5042 insn |= (value & 0xf0000) >> 5;
5043 /* Next 5 bits of the value to 11..15. */
5044 insn |= (value & 0xf800) << 5;
5045 /* And the final 11 bits of the value to bits 21 to 31. */
5046 insn |= value & 0x7ff;
5047 bfd_put_32 (output_bfd, insn, loc);
5048 }
5049
5050 \f
5051 /* Choose which PLT scheme to use, and set .plt flags appropriately.
5052 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
5053 int
5054 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
5055 struct bfd_link_info *info)
5056 {
5057 struct ppc_elf_link_hash_table *htab;
5058 flagword flags;
5059
5060 htab = ppc_elf_hash_table (info);
5061
5062 if (htab->plt_type == PLT_UNSET)
5063 {
5064 struct elf_link_hash_entry *h;
5065
5066 if (htab->params->plt_style == PLT_OLD)
5067 htab->plt_type = PLT_OLD;
5068 else if (bfd_link_pic (info)
5069 && htab->elf.dynamic_sections_created
5070 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
5071 FALSE, FALSE, TRUE)) != NULL
5072 && (h->type == STT_FUNC
5073 || h->needs_plt)
5074 && h->ref_regular
5075 && !(SYMBOL_CALLS_LOCAL (info, h)
5076 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5077 {
5078 /* Profiling of shared libs (and pies) is not supported with
5079 secure plt, because ppc32 does profiling before a
5080 function prologue and a secure plt pic call stubs needs
5081 r30 to be set up. */
5082 htab->plt_type = PLT_OLD;
5083 }
5084 else
5085 {
5086 bfd *ibfd;
5087 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
5088
5089 /* Look through the reloc flags left by ppc_elf_check_relocs.
5090 Use the old style bss plt if a file makes plt calls
5091 without using the new relocs, and if ld isn't given
5092 --secure-plt and we never see REL16 relocs. */
5093 if (plt_type == PLT_UNSET)
5094 plt_type = PLT_OLD;
5095 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
5096 if (is_ppc_elf (ibfd))
5097 {
5098 if (ppc_elf_tdata (ibfd)->has_rel16)
5099 plt_type = PLT_NEW;
5100 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5101 {
5102 plt_type = PLT_OLD;
5103 htab->old_bfd = ibfd;
5104 break;
5105 }
5106 }
5107 htab->plt_type = plt_type;
5108 }
5109 }
5110 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5111 {
5112 if (htab->old_bfd != NULL)
5113 _bfd_error_handler (_("bss-plt forced due to %pB"), htab->old_bfd);
5114 else
5115 _bfd_error_handler (_("bss-plt forced by profiling"));
5116 }
5117
5118 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5119
5120 if (htab->plt_type == PLT_NEW)
5121 {
5122 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5123 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5124
5125 /* The new PLT is a loaded section. */
5126 if (htab->elf.splt != NULL
5127 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5128 return -1;
5129
5130 /* The new GOT is not executable. */
5131 if (htab->elf.sgot != NULL
5132 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5133 return -1;
5134 }
5135 else
5136 {
5137 /* Stop an unused .glink section from affecting .text alignment. */
5138 if (htab->glink != NULL
5139 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5140 return -1;
5141 }
5142 return htab->plt_type == PLT_NEW;
5143 }
5144 \f
5145 /* Return the section that should be marked against GC for a given
5146 relocation. */
5147
5148 static asection *
5149 ppc_elf_gc_mark_hook (asection *sec,
5150 struct bfd_link_info *info,
5151 Elf_Internal_Rela *rel,
5152 struct elf_link_hash_entry *h,
5153 Elf_Internal_Sym *sym)
5154 {
5155 if (h != NULL)
5156 switch (ELF32_R_TYPE (rel->r_info))
5157 {
5158 case R_PPC_GNU_VTINHERIT:
5159 case R_PPC_GNU_VTENTRY:
5160 return NULL;
5161 }
5162
5163 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5164 }
5165
5166 static bfd_boolean
5167 get_sym_h (struct elf_link_hash_entry **hp,
5168 Elf_Internal_Sym **symp,
5169 asection **symsecp,
5170 unsigned char **tls_maskp,
5171 Elf_Internal_Sym **locsymsp,
5172 unsigned long r_symndx,
5173 bfd *ibfd)
5174 {
5175 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5176
5177 if (r_symndx >= symtab_hdr->sh_info)
5178 {
5179 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5180 struct elf_link_hash_entry *h;
5181
5182 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5183 while (h->root.type == bfd_link_hash_indirect
5184 || h->root.type == bfd_link_hash_warning)
5185 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5186
5187 if (hp != NULL)
5188 *hp = h;
5189
5190 if (symp != NULL)
5191 *symp = NULL;
5192
5193 if (symsecp != NULL)
5194 {
5195 asection *symsec = NULL;
5196 if (h->root.type == bfd_link_hash_defined
5197 || h->root.type == bfd_link_hash_defweak)
5198 symsec = h->root.u.def.section;
5199 *symsecp = symsec;
5200 }
5201
5202 if (tls_maskp != NULL)
5203 *tls_maskp = &ppc_elf_hash_entry (h)->tls_mask;
5204 }
5205 else
5206 {
5207 Elf_Internal_Sym *sym;
5208 Elf_Internal_Sym *locsyms = *locsymsp;
5209
5210 if (locsyms == NULL)
5211 {
5212 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5213 if (locsyms == NULL)
5214 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5215 symtab_hdr->sh_info,
5216 0, NULL, NULL, NULL);
5217 if (locsyms == NULL)
5218 return FALSE;
5219 *locsymsp = locsyms;
5220 }
5221 sym = locsyms + r_symndx;
5222
5223 if (hp != NULL)
5224 *hp = NULL;
5225
5226 if (symp != NULL)
5227 *symp = sym;
5228
5229 if (symsecp != NULL)
5230 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5231
5232 if (tls_maskp != NULL)
5233 {
5234 bfd_signed_vma *local_got;
5235 unsigned char *tls_mask;
5236
5237 tls_mask = NULL;
5238 local_got = elf_local_got_refcounts (ibfd);
5239 if (local_got != NULL)
5240 {
5241 struct plt_entry **local_plt = (struct plt_entry **)
5242 (local_got + symtab_hdr->sh_info);
5243 unsigned char *lgot_masks = (unsigned char *)
5244 (local_plt + symtab_hdr->sh_info);
5245 tls_mask = &lgot_masks[r_symndx];
5246 }
5247 *tls_maskp = tls_mask;
5248 }
5249 }
5250 return TRUE;
5251 }
5252 \f
5253 /* Analyze inline PLT call relocations to see whether calls to locally
5254 defined functions can be converted to direct calls. */
5255
5256 bfd_boolean
5257 ppc_elf_inline_plt (struct bfd_link_info *info)
5258 {
5259 struct ppc_elf_link_hash_table *htab;
5260 bfd *ibfd;
5261 asection *sec;
5262 bfd_vma low_vma, high_vma, limit;
5263
5264 htab = ppc_elf_hash_table (info);
5265 if (htab == NULL)
5266 return FALSE;
5267
5268 /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is
5269 reduced somewhat to cater for possible stubs that might be added
5270 between the call and its destination. */
5271 limit = 0x1e00000;
5272 low_vma = -1;
5273 high_vma = 0;
5274 for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next)
5275 if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE))
5276 {
5277 if (low_vma > sec->vma)
5278 low_vma = sec->vma;
5279 if (high_vma < sec->vma + sec->size)
5280 high_vma = sec->vma + sec->size;
5281 }
5282
5283 /* If a "bl" can reach anywhere in local code sections, then we can
5284 convert all inline PLT sequences to direct calls when the symbol
5285 is local. */
5286 if (high_vma - low_vma < limit)
5287 {
5288 htab->can_convert_all_inline_plt = 1;
5289 return TRUE;
5290 }
5291
5292 /* Otherwise, go looking through relocs for cases where a direct
5293 call won't reach. Mark the symbol on any such reloc to disable
5294 the optimization and keep the PLT entry as it seems likely that
5295 this will be better than creating trampolines. Note that this
5296 will disable the optimization for all inline PLT calls to a
5297 particular symbol, not just those that won't reach. The
5298 difficulty in doing a more precise optimization is that the
5299 linker needs to make a decision depending on whether a
5300 particular R_PPC_PLTCALL insn can be turned into a direct
5301 call, for each of the R_PPC_PLTSEQ and R_PPC_PLT16* insns in
5302 the sequence, and there is nothing that ties those relocs
5303 together except their symbol. */
5304
5305 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5306 {
5307 Elf_Internal_Shdr *symtab_hdr;
5308 Elf_Internal_Sym *local_syms;
5309
5310 if (!is_ppc_elf (ibfd))
5311 continue;
5312
5313 local_syms = NULL;
5314 symtab_hdr = &elf_symtab_hdr (ibfd);
5315
5316 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5317 if (sec->has_pltcall
5318 && !bfd_is_abs_section (sec->output_section))
5319 {
5320 Elf_Internal_Rela *relstart, *rel, *relend;
5321
5322 /* Read the relocations. */
5323 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5324 info->keep_memory);
5325 if (relstart == NULL)
5326 return FALSE;
5327
5328 relend = relstart + sec->reloc_count;
5329 for (rel = relstart; rel < relend; )
5330 {
5331 enum elf_ppc_reloc_type r_type;
5332 unsigned long r_symndx;
5333 asection *sym_sec;
5334 struct elf_link_hash_entry *h;
5335 Elf_Internal_Sym *sym;
5336 unsigned char *tls_maskp;
5337
5338 r_type = ELF32_R_TYPE (rel->r_info);
5339 if (r_type != R_PPC_PLTCALL)
5340 continue;
5341
5342 r_symndx = ELF32_R_SYM (rel->r_info);
5343 if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms,
5344 r_symndx, ibfd))
5345 {
5346 if (elf_section_data (sec)->relocs != relstart)
5347 free (relstart);
5348 if (local_syms != NULL
5349 && symtab_hdr->contents != (unsigned char *) local_syms)
5350 free (local_syms);
5351 return FALSE;
5352 }
5353
5354 if (sym_sec != NULL && sym_sec->output_section != NULL)
5355 {
5356 bfd_vma from, to;
5357 if (h != NULL)
5358 to = h->root.u.def.value;
5359 else
5360 to = sym->st_value;
5361 to += (rel->r_addend
5362 + sym_sec->output_offset
5363 + sym_sec->output_section->vma);
5364 from = (rel->r_offset
5365 + sec->output_offset
5366 + sec->output_section->vma);
5367 if (to - from + limit < 2 * limit)
5368 *tls_maskp &= ~PLT_KEEP;
5369 }
5370 }
5371 if (elf_section_data (sec)->relocs != relstart)
5372 free (relstart);
5373 }
5374
5375 if (local_syms != NULL
5376 && symtab_hdr->contents != (unsigned char *) local_syms)
5377 {
5378 if (!info->keep_memory)
5379 free (local_syms);
5380 else
5381 symtab_hdr->contents = (unsigned char *) local_syms;
5382 }
5383 }
5384
5385 return TRUE;
5386 }
5387
5388 /* Set plt output section type, htab->tls_get_addr, and call the
5389 generic ELF tls_setup function. */
5390
5391 asection *
5392 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5393 {
5394 struct ppc_elf_link_hash_table *htab;
5395
5396 htab = ppc_elf_hash_table (info);
5397 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5398 FALSE, FALSE, TRUE);
5399 if (htab->plt_type != PLT_NEW)
5400 htab->params->no_tls_get_addr_opt = TRUE;
5401
5402 if (!htab->params->no_tls_get_addr_opt)
5403 {
5404 struct elf_link_hash_entry *opt, *tga;
5405 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5406 FALSE, FALSE, TRUE);
5407 if (opt != NULL
5408 && (opt->root.type == bfd_link_hash_defined
5409 || opt->root.type == bfd_link_hash_defweak))
5410 {
5411 /* If glibc supports an optimized __tls_get_addr call stub,
5412 signalled by the presence of __tls_get_addr_opt, and we'll
5413 be calling __tls_get_addr via a plt call stub, then
5414 make __tls_get_addr point to __tls_get_addr_opt. */
5415 tga = htab->tls_get_addr;
5416 if (htab->elf.dynamic_sections_created
5417 && tga != NULL
5418 && (tga->type == STT_FUNC
5419 || tga->needs_plt)
5420 && !(SYMBOL_CALLS_LOCAL (info, tga)
5421 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5422 {
5423 struct plt_entry *ent;
5424 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5425 if (ent->plt.refcount > 0)
5426 break;
5427 if (ent != NULL)
5428 {
5429 tga->root.type = bfd_link_hash_indirect;
5430 tga->root.u.i.link = &opt->root;
5431 ppc_elf_copy_indirect_symbol (info, opt, tga);
5432 opt->mark = 1;
5433 if (opt->dynindx != -1)
5434 {
5435 /* Use __tls_get_addr_opt in dynamic relocations. */
5436 opt->dynindx = -1;
5437 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5438 opt->dynstr_index);
5439 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5440 return FALSE;
5441 }
5442 htab->tls_get_addr = opt;
5443 }
5444 }
5445 }
5446 else
5447 htab->params->no_tls_get_addr_opt = TRUE;
5448 }
5449 if (htab->plt_type == PLT_NEW
5450 && htab->elf.splt != NULL
5451 && htab->elf.splt->output_section != NULL)
5452 {
5453 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5454 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5455 }
5456
5457 return _bfd_elf_tls_setup (obfd, info);
5458 }
5459
5460 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5461 HASH. */
5462
5463 static bfd_boolean
5464 branch_reloc_hash_match (const bfd *ibfd,
5465 const Elf_Internal_Rela *rel,
5466 const struct elf_link_hash_entry *hash)
5467 {
5468 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5469 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5470 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5471
5472 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5473 {
5474 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5475 struct elf_link_hash_entry *h;
5476
5477 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5478 while (h->root.type == bfd_link_hash_indirect
5479 || h->root.type == bfd_link_hash_warning)
5480 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5481 if (h == hash)
5482 return TRUE;
5483 }
5484 return FALSE;
5485 }
5486
5487 /* Run through all the TLS relocs looking for optimization
5488 opportunities. */
5489
5490 bfd_boolean
5491 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5492 struct bfd_link_info *info)
5493 {
5494 bfd *ibfd;
5495 asection *sec;
5496 struct ppc_elf_link_hash_table *htab;
5497 int pass;
5498
5499 if (!bfd_link_executable (info))
5500 return TRUE;
5501
5502 htab = ppc_elf_hash_table (info);
5503 if (htab == NULL)
5504 return FALSE;
5505
5506 /* Make two passes through the relocs. First time check that tls
5507 relocs involved in setting up a tls_get_addr call are indeed
5508 followed by such a call. If they are not, don't do any tls
5509 optimization. On the second pass twiddle tls_mask flags to
5510 notify relocate_section that optimization can be done, and
5511 adjust got and plt refcounts. */
5512 for (pass = 0; pass < 2; ++pass)
5513 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5514 {
5515 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5516 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5517
5518 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5519 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5520 {
5521 Elf_Internal_Rela *relstart, *rel, *relend;
5522 int expecting_tls_get_addr = 0;
5523
5524 /* Read the relocations. */
5525 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5526 info->keep_memory);
5527 if (relstart == NULL)
5528 return FALSE;
5529
5530 relend = relstart + sec->reloc_count;
5531 for (rel = relstart; rel < relend; rel++)
5532 {
5533 enum elf_ppc_reloc_type r_type;
5534 unsigned long r_symndx;
5535 struct elf_link_hash_entry *h = NULL;
5536 unsigned char *tls_mask;
5537 unsigned char tls_set, tls_clear;
5538 bfd_boolean is_local;
5539 bfd_signed_vma *got_count;
5540
5541 r_symndx = ELF32_R_SYM (rel->r_info);
5542 if (r_symndx >= symtab_hdr->sh_info)
5543 {
5544 struct elf_link_hash_entry **sym_hashes;
5545
5546 sym_hashes = elf_sym_hashes (ibfd);
5547 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5548 while (h->root.type == bfd_link_hash_indirect
5549 || h->root.type == bfd_link_hash_warning)
5550 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5551 }
5552
5553 is_local = FALSE;
5554 if (h == NULL
5555 || !h->def_dynamic)
5556 is_local = TRUE;
5557
5558 r_type = ELF32_R_TYPE (rel->r_info);
5559 /* If this section has old-style __tls_get_addr calls
5560 without marker relocs, then check that each
5561 __tls_get_addr call reloc is preceded by a reloc
5562 that conceivably belongs to the __tls_get_addr arg
5563 setup insn. If we don't find matching arg setup
5564 relocs, don't do any tls optimization. */
5565 if (pass == 0
5566 && sec->has_tls_get_addr_call
5567 && h != NULL
5568 && h == htab->tls_get_addr
5569 && !expecting_tls_get_addr
5570 && is_branch_reloc (r_type))
5571 {
5572 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5573 "TLS optimization disabled\n",
5574 ibfd, sec, rel->r_offset);
5575 if (elf_section_data (sec)->relocs != relstart)
5576 free (relstart);
5577 return TRUE;
5578 }
5579
5580 expecting_tls_get_addr = 0;
5581 switch (r_type)
5582 {
5583 case R_PPC_GOT_TLSLD16:
5584 case R_PPC_GOT_TLSLD16_LO:
5585 expecting_tls_get_addr = 1;
5586 /* Fall through. */
5587
5588 case R_PPC_GOT_TLSLD16_HI:
5589 case R_PPC_GOT_TLSLD16_HA:
5590 /* These relocs should never be against a symbol
5591 defined in a shared lib. Leave them alone if
5592 that turns out to be the case. */
5593 if (!is_local)
5594 continue;
5595
5596 /* LD -> LE */
5597 tls_set = 0;
5598 tls_clear = TLS_LD;
5599 break;
5600
5601 case R_PPC_GOT_TLSGD16:
5602 case R_PPC_GOT_TLSGD16_LO:
5603 expecting_tls_get_addr = 1;
5604 /* Fall through. */
5605
5606 case R_PPC_GOT_TLSGD16_HI:
5607 case R_PPC_GOT_TLSGD16_HA:
5608 if (is_local)
5609 /* GD -> LE */
5610 tls_set = 0;
5611 else
5612 /* GD -> IE */
5613 tls_set = TLS_TLS | TLS_TPRELGD;
5614 tls_clear = TLS_GD;
5615 break;
5616
5617 case R_PPC_GOT_TPREL16:
5618 case R_PPC_GOT_TPREL16_LO:
5619 case R_PPC_GOT_TPREL16_HI:
5620 case R_PPC_GOT_TPREL16_HA:
5621 if (is_local)
5622 {
5623 /* IE -> LE */
5624 tls_set = 0;
5625 tls_clear = TLS_TPREL;
5626 break;
5627 }
5628 else
5629 continue;
5630
5631 case R_PPC_TLSGD:
5632 case R_PPC_TLSLD:
5633 if (rel + 1 < relend
5634 && is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
5635 {
5636 if (pass != 0
5637 && ELF32_R_TYPE (rel[1].r_info) != R_PPC_PLTSEQ)
5638 {
5639 r_type = ELF32_R_TYPE (rel[1].r_info);
5640 r_symndx = ELF32_R_SYM (rel[1].r_info);
5641 if (r_symndx >= symtab_hdr->sh_info)
5642 {
5643 struct elf_link_hash_entry **sym_hashes;
5644
5645 sym_hashes = elf_sym_hashes (ibfd);
5646 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5647 while (h->root.type == bfd_link_hash_indirect
5648 || h->root.type == bfd_link_hash_warning)
5649 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5650 if (h != NULL)
5651 {
5652 struct plt_entry *ent = NULL;
5653 bfd_vma addend = 0;
5654
5655 if (bfd_link_pic (info))
5656 addend = rel->r_addend;
5657 ent = find_plt_ent (&h->plt.plist,
5658 got2, addend);
5659 if (ent != NULL
5660 && ent->plt.refcount > 0)
5661 ent->plt.refcount -= 1;
5662 }
5663 }
5664 }
5665 continue;
5666 }
5667 expecting_tls_get_addr = 2;
5668 tls_set = 0;
5669 tls_clear = 0;
5670 break;
5671
5672 default:
5673 continue;
5674 }
5675
5676 if (pass == 0)
5677 {
5678 if (!expecting_tls_get_addr
5679 || !sec->has_tls_get_addr_call)
5680 continue;
5681
5682 if (rel + 1 < relend
5683 && branch_reloc_hash_match (ibfd, rel + 1,
5684 htab->tls_get_addr))
5685 continue;
5686
5687 /* Uh oh, we didn't find the expected call. We
5688 could just mark this symbol to exclude it
5689 from tls optimization but it's safer to skip
5690 the entire optimization. */
5691 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5692 "TLS optimization disabled\n"),
5693 ibfd, sec, rel->r_offset);
5694 if (elf_section_data (sec)->relocs != relstart)
5695 free (relstart);
5696 return TRUE;
5697 }
5698
5699 if (h != NULL)
5700 {
5701 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5702 got_count = &h->got.refcount;
5703 }
5704 else
5705 {
5706 bfd_signed_vma *lgot_refs;
5707 struct plt_entry **local_plt;
5708 unsigned char *lgot_masks;
5709
5710 lgot_refs = elf_local_got_refcounts (ibfd);
5711 if (lgot_refs == NULL)
5712 abort ();
5713 local_plt = (struct plt_entry **)
5714 (lgot_refs + symtab_hdr->sh_info);
5715 lgot_masks = (unsigned char *)
5716 (local_plt + symtab_hdr->sh_info);
5717 tls_mask = &lgot_masks[r_symndx];
5718 got_count = &lgot_refs[r_symndx];
5719 }
5720
5721 /* If we don't have old-style __tls_get_addr calls
5722 without TLSGD/TLSLD marker relocs, and we haven't
5723 found a new-style __tls_get_addr call with a
5724 marker for this symbol, then we either have a
5725 broken object file or an -mlongcall style
5726 indirect call to __tls_get_addr without a marker.
5727 Disable optimization in this case. */
5728 if ((tls_clear & (TLS_GD | TLS_LD)) != 0
5729 && !sec->has_tls_get_addr_call
5730 && ((*tls_mask & (TLS_TLS | TLS_MARK))
5731 != (TLS_TLS | TLS_MARK)))
5732 continue;
5733
5734 if (expecting_tls_get_addr)
5735 {
5736 struct plt_entry *ent;
5737 bfd_vma addend = 0;
5738
5739 if (bfd_link_pic (info)
5740 && (ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24
5741 || ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTCALL))
5742 addend = rel[1].r_addend;
5743 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5744 got2, addend);
5745 if (ent != NULL && ent->plt.refcount > 0)
5746 ent->plt.refcount -= 1;
5747
5748 if (expecting_tls_get_addr == 2)
5749 continue;
5750 }
5751
5752 if (tls_set == 0)
5753 {
5754 /* We managed to get rid of a got entry. */
5755 if (*got_count > 0)
5756 *got_count -= 1;
5757 }
5758
5759 *tls_mask |= tls_set;
5760 *tls_mask &= ~tls_clear;
5761 }
5762
5763 if (elf_section_data (sec)->relocs != relstart)
5764 free (relstart);
5765 }
5766 }
5767 htab->do_tls_opt = 1;
5768 return TRUE;
5769 }
5770 \f
5771 /* Find dynamic relocs for H that apply to read-only sections. */
5772
5773 static asection *
5774 readonly_dynrelocs (struct elf_link_hash_entry *h)
5775 {
5776 struct elf_dyn_relocs *p;
5777
5778 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5779 {
5780 asection *s = p->sec->output_section;
5781
5782 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5783 return p->sec;
5784 }
5785 return NULL;
5786 }
5787
5788 /* Return true if we have dynamic relocs against H or any of its weak
5789 aliases, that apply to read-only sections. Cannot be used after
5790 size_dynamic_sections. */
5791
5792 static bfd_boolean
5793 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
5794 {
5795 struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h);
5796 do
5797 {
5798 if (readonly_dynrelocs (&eh->elf))
5799 return TRUE;
5800 eh = ppc_elf_hash_entry (eh->elf.u.alias);
5801 } while (eh != NULL && &eh->elf != h);
5802
5803 return FALSE;
5804 }
5805
5806 /* Return whether H has pc-relative dynamic relocs. */
5807
5808 static bfd_boolean
5809 pc_dynrelocs (struct elf_link_hash_entry *h)
5810 {
5811 struct elf_dyn_relocs *p;
5812
5813 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5814 if (p->pc_count != 0)
5815 return TRUE;
5816 return FALSE;
5817 }
5818
5819 /* Adjust a symbol defined by a dynamic object and referenced by a
5820 regular object. The current definition is in some section of the
5821 dynamic object, but we're not including those sections. We have to
5822 change the definition to something the rest of the link can
5823 understand. */
5824
5825 static bfd_boolean
5826 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5827 struct elf_link_hash_entry *h)
5828 {
5829 struct ppc_elf_link_hash_table *htab;
5830 asection *s;
5831
5832 #ifdef DEBUG
5833 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5834 h->root.root.string);
5835 #endif
5836
5837 /* Make sure we know what is going on here. */
5838 htab = ppc_elf_hash_table (info);
5839 BFD_ASSERT (htab->elf.dynobj != NULL
5840 && (h->needs_plt
5841 || h->type == STT_GNU_IFUNC
5842 || h->is_weakalias
5843 || (h->def_dynamic
5844 && h->ref_regular
5845 && !h->def_regular)));
5846
5847 /* Deal with function syms. */
5848 if (h->type == STT_FUNC
5849 || h->type == STT_GNU_IFUNC
5850 || h->needs_plt)
5851 {
5852 bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, h)
5853 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
5854 /* Discard dyn_relocs when non-pic if we've decided that a
5855 function symbol is local. */
5856 if (!bfd_link_pic (info) && local)
5857 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5858
5859 /* Clear procedure linkage table information for any symbol that
5860 won't need a .plt entry. */
5861 struct plt_entry *ent;
5862 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5863 if (ent->plt.refcount > 0)
5864 break;
5865 if (ent == NULL
5866 || (h->type != STT_GNU_IFUNC
5867 && local
5868 && (htab->can_convert_all_inline_plt
5869 || (ppc_elf_hash_entry (h)->tls_mask
5870 & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)))
5871 {
5872 /* A PLT entry is not required/allowed when:
5873
5874 1. We are not using ld.so; because then the PLT entry
5875 can't be set up, so we can't use one. In this case,
5876 ppc_elf_adjust_dynamic_symbol won't even be called.
5877
5878 2. GC has rendered the entry unused.
5879
5880 3. We know for certain that a call to this symbol
5881 will go to this object, or will remain undefined. */
5882 h->plt.plist = NULL;
5883 h->needs_plt = 0;
5884 h->pointer_equality_needed = 0;
5885 }
5886 else
5887 {
5888 /* Taking a function's address in a read/write section
5889 doesn't require us to define the function symbol in the
5890 executable on a plt call stub. A dynamic reloc can
5891 be used instead, giving better runtime performance.
5892 (Calls via that function pointer don't need to bounce
5893 through the plt call stub.) Similarly, use a dynamic
5894 reloc for a weak reference when possible, allowing the
5895 resolution of the symbol to be set at load time rather
5896 than link time. */
5897 if ((h->pointer_equality_needed
5898 || (h->non_got_ref
5899 && !h->ref_regular_nonweak
5900 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5901 && !htab->is_vxworks
5902 && !ppc_elf_hash_entry (h)->has_sda_refs
5903 && !readonly_dynrelocs (h))
5904 {
5905 h->pointer_equality_needed = 0;
5906 /* If we haven't seen a branch reloc and the symbol
5907 isn't an ifunc then we don't need a plt entry. */
5908 if (!h->needs_plt && h->type != STT_GNU_IFUNC)
5909 h->plt.plist = NULL;
5910 }
5911 else if (!bfd_link_pic (info))
5912 /* We are going to be defining the function symbol on the
5913 plt stub, so no dyn_relocs needed when non-pic. */
5914 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5915 }
5916 h->protected_def = 0;
5917 /* Function symbols can't have copy relocs. */
5918 return TRUE;
5919 }
5920 else
5921 h->plt.plist = NULL;
5922
5923 /* If this is a weak symbol, and there is a real definition, the
5924 processor independent code will have arranged for us to see the
5925 real definition first, and we can just use the same value. */
5926 if (h->is_weakalias)
5927 {
5928 struct elf_link_hash_entry *def = weakdef (h);
5929 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5930 h->root.u.def.section = def->root.u.def.section;
5931 h->root.u.def.value = def->root.u.def.value;
5932 if (def->root.u.def.section == htab->elf.sdynbss
5933 || def->root.u.def.section == htab->elf.sdynrelro
5934 || def->root.u.def.section == htab->dynsbss)
5935 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5936 return TRUE;
5937 }
5938
5939 /* This is a reference to a symbol defined by a dynamic object which
5940 is not a function. */
5941
5942 /* If we are creating a shared library, we must presume that the
5943 only references to the symbol are via the global offset table.
5944 For such cases we need not do anything here; the relocations will
5945 be handled correctly by relocate_section. */
5946 if (bfd_link_pic (info))
5947 {
5948 h->protected_def = 0;
5949 return TRUE;
5950 }
5951
5952 /* If there are no references to this symbol that do not use the
5953 GOT, we don't need to generate a copy reloc. */
5954 if (!h->non_got_ref)
5955 {
5956 h->protected_def = 0;
5957 return TRUE;
5958 }
5959
5960 /* Protected variables do not work with .dynbss. The copy in
5961 .dynbss won't be used by the shared library with the protected
5962 definition for the variable. Editing to PIC, or text relocations
5963 are preferable to an incorrect program. */
5964 if (h->protected_def)
5965 {
5966 if (ELIMINATE_COPY_RELOCS
5967 && ppc_elf_hash_entry (h)->has_addr16_ha
5968 && ppc_elf_hash_entry (h)->has_addr16_lo
5969 && htab->params->pic_fixup == 0
5970 && info->disable_target_specific_optimizations <= 1)
5971 htab->params->pic_fixup = 1;
5972 return TRUE;
5973 }
5974
5975 /* If -z nocopyreloc was given, we won't generate them either. */
5976 if (info->nocopyreloc)
5977 return TRUE;
5978
5979 /* If we don't find any dynamic relocs in read-only sections, then
5980 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5981 We can't do this if there are any small data relocations. This
5982 doesn't work on VxWorks, where we can not have dynamic
5983 relocations (other than copy and jump slot relocations) in an
5984 executable. */
5985 if (ELIMINATE_COPY_RELOCS
5986 && !ppc_elf_hash_entry (h)->has_sda_refs
5987 && !htab->is_vxworks
5988 && !h->def_regular
5989 && !alias_readonly_dynrelocs (h))
5990 return TRUE;
5991
5992 /* We must allocate the symbol in our .dynbss section, which will
5993 become part of the .bss section of the executable. There will be
5994 an entry for this symbol in the .dynsym section. The dynamic
5995 object will contain position independent code, so all references
5996 from the dynamic object to this symbol will go through the global
5997 offset table. The dynamic linker will use the .dynsym entry to
5998 determine the address it must put in the global offset table, so
5999 both the dynamic object and the regular object will refer to the
6000 same memory location for the variable.
6001
6002 Of course, if the symbol is referenced using SDAREL relocs, we
6003 must instead allocate it in .sbss. */
6004 if (ppc_elf_hash_entry (h)->has_sda_refs)
6005 s = htab->dynsbss;
6006 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
6007 s = htab->elf.sdynrelro;
6008 else
6009 s = htab->elf.sdynbss;
6010 BFD_ASSERT (s != NULL);
6011
6012 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6013 {
6014 asection *srel;
6015
6016 /* We must generate a R_PPC_COPY reloc to tell the dynamic
6017 linker to copy the initial value out of the dynamic object
6018 and into the runtime process image. */
6019 if (ppc_elf_hash_entry (h)->has_sda_refs)
6020 srel = htab->relsbss;
6021 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
6022 srel = htab->elf.sreldynrelro;
6023 else
6024 srel = htab->elf.srelbss;
6025 BFD_ASSERT (srel != NULL);
6026 srel->size += sizeof (Elf32_External_Rela);
6027 h->needs_copy = 1;
6028 }
6029
6030 /* We no longer want dyn_relocs. */
6031 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
6032 return _bfd_elf_adjust_dynamic_copy (info, h, s);
6033 }
6034 \f
6035 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
6036 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
6037 specifying the addend on the plt relocation. For -fpic code, the sym
6038 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
6039 xxxxxxxx.got2.plt_pic32.<callee>. */
6040
6041 static bfd_boolean
6042 add_stub_sym (struct plt_entry *ent,
6043 struct elf_link_hash_entry *h,
6044 struct bfd_link_info *info)
6045 {
6046 struct elf_link_hash_entry *sh;
6047 size_t len1, len2, len3;
6048 char *name;
6049 const char *stub;
6050 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6051
6052 if (bfd_link_pic (info))
6053 stub = ".plt_pic32.";
6054 else
6055 stub = ".plt_call32.";
6056
6057 len1 = strlen (h->root.root.string);
6058 len2 = strlen (stub);
6059 len3 = 0;
6060 if (ent->sec)
6061 len3 = strlen (ent->sec->name);
6062 name = bfd_malloc (len1 + len2 + len3 + 9);
6063 if (name == NULL)
6064 return FALSE;
6065 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
6066 if (ent->sec)
6067 memcpy (name + 8, ent->sec->name, len3);
6068 memcpy (name + 8 + len3, stub, len2);
6069 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
6070 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
6071 if (sh == NULL)
6072 return FALSE;
6073 if (sh->root.type == bfd_link_hash_new)
6074 {
6075 sh->root.type = bfd_link_hash_defined;
6076 sh->root.u.def.section = htab->glink;
6077 sh->root.u.def.value = ent->glink_offset;
6078 sh->ref_regular = 1;
6079 sh->def_regular = 1;
6080 sh->ref_regular_nonweak = 1;
6081 sh->forced_local = 1;
6082 sh->non_elf = 0;
6083 sh->root.linker_def = 1;
6084 }
6085 return TRUE;
6086 }
6087
6088 /* Allocate NEED contiguous space in .got, and return the offset.
6089 Handles allocation of the got header when crossing 32k. */
6090
6091 static bfd_vma
6092 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
6093 {
6094 bfd_vma where;
6095 unsigned int max_before_header;
6096
6097 if (htab->plt_type == PLT_VXWORKS)
6098 {
6099 where = htab->elf.sgot->size;
6100 htab->elf.sgot->size += need;
6101 }
6102 else
6103 {
6104 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
6105 if (need <= htab->got_gap)
6106 {
6107 where = max_before_header - htab->got_gap;
6108 htab->got_gap -= need;
6109 }
6110 else
6111 {
6112 if (htab->elf.sgot->size + need > max_before_header
6113 && htab->elf.sgot->size <= max_before_header)
6114 {
6115 htab->got_gap = max_before_header - htab->elf.sgot->size;
6116 htab->elf.sgot->size = max_before_header + htab->got_header_size;
6117 }
6118 where = htab->elf.sgot->size;
6119 htab->elf.sgot->size += need;
6120 }
6121 }
6122 return where;
6123 }
6124
6125 /* Calculate size of GOT entries for symbol given its TLS_MASK.
6126 TLS_LD is excluded because those go in a special GOT slot. */
6127
6128 static inline unsigned int
6129 got_entries_needed (int tls_mask)
6130 {
6131 unsigned int need;
6132 if ((tls_mask & TLS_TLS) == 0)
6133 need = 4;
6134 else
6135 {
6136 need = 0;
6137 if ((tls_mask & TLS_GD) != 0)
6138 need += 8;
6139 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6140 need += 4;
6141 if ((tls_mask & TLS_DTPREL) != 0)
6142 need += 4;
6143 }
6144 return need;
6145 }
6146
6147 /* Calculate size of relocs needed for symbol given its TLS_MASK and
6148 NEEDed GOT entries. KNOWN says a TPREL offset can be calculated at
6149 link time. */
6150
6151 static inline unsigned int
6152 got_relocs_needed (int tls_mask, unsigned int need, bfd_boolean known)
6153 {
6154 /* All the entries we allocated need relocs.
6155 Except IE in executable with a local symbol. We could also omit
6156 the DTPREL reloc on the second word of a GD entry under the same
6157 condition as that for IE, but ld.so needs to differentiate
6158 LD and GD entries. */
6159 if (known && (tls_mask & TLS_TLS) != 0
6160 && (tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6161 need -= 4;
6162 return need * sizeof (Elf32_External_Rela) / 4;
6163 }
6164
6165 /* If H is undefined, make it dynamic if that makes sense. */
6166
6167 static bfd_boolean
6168 ensure_undef_dynamic (struct bfd_link_info *info,
6169 struct elf_link_hash_entry *h)
6170 {
6171 struct elf_link_hash_table *htab = elf_hash_table (info);
6172
6173 if (htab->dynamic_sections_created
6174 && ((info->dynamic_undefined_weak != 0
6175 && h->root.type == bfd_link_hash_undefweak)
6176 || h->root.type == bfd_link_hash_undefined)
6177 && h->dynindx == -1
6178 && !h->forced_local
6179 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
6180 return bfd_elf_link_record_dynamic_symbol (info, h);
6181 return TRUE;
6182 }
6183
6184 /* Allocate space in associated reloc sections for dynamic relocs. */
6185
6186 static bfd_boolean
6187 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6188 {
6189 struct bfd_link_info *info = inf;
6190 struct ppc_elf_link_hash_entry *eh;
6191 struct ppc_elf_link_hash_table *htab;
6192 struct elf_dyn_relocs *p;
6193 bfd_boolean dyn;
6194
6195 if (h->root.type == bfd_link_hash_indirect)
6196 return TRUE;
6197
6198 htab = ppc_elf_hash_table (info);
6199 eh = (struct ppc_elf_link_hash_entry *) h;
6200 if (eh->elf.got.refcount > 0
6201 || (ELIMINATE_COPY_RELOCS
6202 && !eh->elf.def_regular
6203 && eh->elf.protected_def
6204 && eh->has_addr16_ha
6205 && eh->has_addr16_lo
6206 && htab->params->pic_fixup > 0))
6207 {
6208 unsigned int need;
6209
6210 /* Make sure this symbol is output as a dynamic symbol. */
6211 if (!ensure_undef_dynamic (info, &eh->elf))
6212 return FALSE;
6213
6214 need = 0;
6215 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
6216 {
6217 if (!eh->elf.def_dynamic)
6218 /* We'll just use htab->tlsld_got.offset. This should
6219 always be the case. It's a little odd if we have
6220 a local dynamic reloc against a non-local symbol. */
6221 htab->tlsld_got.refcount += 1;
6222 else
6223 need += 8;
6224 }
6225 need += got_entries_needed (eh->tls_mask);
6226 if (need == 0)
6227 eh->elf.got.offset = (bfd_vma) -1;
6228 else
6229 {
6230 eh->elf.got.offset = allocate_got (htab, need);
6231 if ((bfd_link_pic (info)
6232 || (htab->elf.dynamic_sections_created
6233 && eh->elf.dynindx != -1
6234 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
6235 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
6236 {
6237 asection *rsec;
6238 bfd_boolean tprel_known = (bfd_link_executable (info)
6239 && SYMBOL_REFERENCES_LOCAL (info,
6240 &eh->elf));
6241
6242 need = got_relocs_needed (eh->tls_mask, need, tprel_known);
6243 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD)
6244 && eh->elf.def_dynamic)
6245 need -= sizeof (Elf32_External_Rela);
6246 rsec = htab->elf.srelgot;
6247 if (eh->elf.type == STT_GNU_IFUNC)
6248 rsec = htab->elf.irelplt;
6249 rsec->size += need;
6250 }
6251 }
6252 }
6253 else
6254 eh->elf.got.offset = (bfd_vma) -1;
6255
6256 /* If no dynamic sections we can't have dynamic relocs, except for
6257 IFUNCs which are handled even in static executables. */
6258 if (!htab->elf.dynamic_sections_created
6259 && h->type != STT_GNU_IFUNC)
6260 eh->dyn_relocs = NULL;
6261
6262 /* Discard relocs on undefined symbols that must be local. */
6263 else if (h->root.type == bfd_link_hash_undefined
6264 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6265 eh->dyn_relocs = NULL;
6266
6267 /* Also discard relocs on undefined weak syms with non-default
6268 visibility, or when dynamic_undefined_weak says so. */
6269 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
6270 eh->dyn_relocs = NULL;
6271
6272 if (eh->dyn_relocs == NULL)
6273 ;
6274
6275 /* In the shared -Bsymbolic case, discard space allocated for
6276 dynamic pc-relative relocs against symbols which turn out to be
6277 defined in regular objects. For the normal shared case, discard
6278 space for relocs that have become local due to symbol visibility
6279 changes. */
6280 else if (bfd_link_pic (info))
6281 {
6282 /* Relocs that use pc_count are those that appear on a call insn,
6283 or certain REL relocs (see must_be_dyn_reloc) that can be
6284 generated via assembly. We want calls to protected symbols to
6285 resolve directly to the function rather than going via the plt.
6286 If people want function pointer comparisons to work as expected
6287 then they should avoid writing weird assembly. */
6288 if (SYMBOL_CALLS_LOCAL (info, h))
6289 {
6290 struct elf_dyn_relocs **pp;
6291
6292 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6293 {
6294 p->count -= p->pc_count;
6295 p->pc_count = 0;
6296 if (p->count == 0)
6297 *pp = p->next;
6298 else
6299 pp = &p->next;
6300 }
6301 }
6302
6303 if (htab->is_vxworks)
6304 {
6305 struct elf_dyn_relocs **pp;
6306
6307 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6308 {
6309 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6310 *pp = p->next;
6311 else
6312 pp = &p->next;
6313 }
6314 }
6315
6316 if (eh->dyn_relocs != NULL)
6317 {
6318 /* Make sure this symbol is output as a dynamic symbol. */
6319 if (!ensure_undef_dynamic (info, h))
6320 return FALSE;
6321 }
6322 }
6323 else if (ELIMINATE_COPY_RELOCS)
6324 {
6325 /* For the non-pic case, discard space for relocs against
6326 symbols which turn out to need copy relocs or are not
6327 dynamic. */
6328 if (h->dynamic_adjusted
6329 && !h->def_regular
6330 && !ELF_COMMON_DEF_P (h)
6331 && !(h->protected_def
6332 && eh->has_addr16_ha
6333 && eh->has_addr16_lo
6334 && htab->params->pic_fixup > 0))
6335 {
6336 /* Make sure this symbol is output as a dynamic symbol. */
6337 if (!ensure_undef_dynamic (info, h))
6338 return FALSE;
6339
6340 if (h->dynindx == -1)
6341 eh->dyn_relocs = NULL;
6342 }
6343 else
6344 eh->dyn_relocs = NULL;
6345 }
6346
6347 /* Allocate space. */
6348 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6349 {
6350 asection *sreloc = elf_section_data (p->sec)->sreloc;
6351 if (eh->elf.type == STT_GNU_IFUNC)
6352 sreloc = htab->elf.irelplt;
6353 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6354 }
6355
6356 /* Handle PLT relocs. Done last, after dynindx has settled.
6357 We might need a PLT entry when the symbol
6358 a) is dynamic, or
6359 b) is an ifunc, or
6360 c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or
6361 d) has plt16 relocs and we are linking statically. */
6362 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6363 if (dyn
6364 || h->type == STT_GNU_IFUNC
6365 || (h->needs_plt && h->dynamic_adjusted)
6366 || (h->needs_plt
6367 && h->def_regular
6368 && !htab->elf.dynamic_sections_created
6369 && !htab->can_convert_all_inline_plt
6370 && (ppc_elf_hash_entry (h)->tls_mask
6371 & (TLS_TLS | PLT_KEEP)) == PLT_KEEP))
6372 {
6373 struct plt_entry *ent;
6374 bfd_boolean doneone = FALSE;
6375 bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
6376
6377 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6378 if (ent->plt.refcount > 0)
6379 {
6380 asection *s = htab->elf.splt;
6381
6382 if (!dyn)
6383 {
6384 if (h->type == STT_GNU_IFUNC)
6385 s = htab->elf.iplt;
6386 else
6387 s = htab->pltlocal;
6388 }
6389
6390 if (htab->plt_type == PLT_NEW || !dyn)
6391 {
6392 if (!doneone)
6393 {
6394 plt_offset = s->size;
6395 s->size += 4;
6396 }
6397 ent->plt.offset = plt_offset;
6398
6399 if (s == htab->pltlocal)
6400 ent->glink_offset = glink_offset;
6401 else
6402 {
6403 s = htab->glink;
6404 if (!doneone || bfd_link_pic (info))
6405 {
6406 glink_offset = s->size;
6407 s->size += GLINK_ENTRY_SIZE (htab, h);
6408 }
6409 if (!doneone
6410 && !bfd_link_pic (info)
6411 && h->def_dynamic
6412 && !h->def_regular)
6413 {
6414 h->root.u.def.section = s;
6415 h->root.u.def.value = glink_offset;
6416 }
6417 ent->glink_offset = glink_offset;
6418
6419 if (htab->params->emit_stub_syms
6420 && !add_stub_sym (ent, h, info))
6421 return FALSE;
6422 }
6423 }
6424 else
6425 {
6426 if (!doneone)
6427 {
6428 /* If this is the first .plt entry, make room
6429 for the special first entry. */
6430 if (s->size == 0)
6431 s->size += htab->plt_initial_entry_size;
6432
6433 /* The PowerPC PLT is actually composed of two
6434 parts, the first part is 2 words (for a load
6435 and a jump), and then there is a remaining
6436 word available at the end. */
6437 plt_offset = (htab->plt_initial_entry_size
6438 + (htab->plt_slot_size
6439 * ((s->size
6440 - htab->plt_initial_entry_size)
6441 / htab->plt_entry_size)));
6442
6443 /* If this symbol is not defined in a regular
6444 file, and we are not generating a shared
6445 library, then set the symbol to this location
6446 in the .plt. This is to avoid text
6447 relocations, and is required to make
6448 function pointers compare as equal between
6449 the normal executable and the shared library. */
6450 if (! bfd_link_pic (info)
6451 && h->def_dynamic
6452 && !h->def_regular)
6453 {
6454 h->root.u.def.section = s;
6455 h->root.u.def.value = plt_offset;
6456 }
6457
6458 /* Make room for this entry. */
6459 s->size += htab->plt_entry_size;
6460 /* After the 8192nd entry, room for two entries
6461 is allocated. */
6462 if (htab->plt_type == PLT_OLD
6463 && (s->size - htab->plt_initial_entry_size)
6464 / htab->plt_entry_size
6465 > PLT_NUM_SINGLE_ENTRIES)
6466 s->size += htab->plt_entry_size;
6467 }
6468 ent->plt.offset = plt_offset;
6469 }
6470
6471 /* We also need to make an entry in the .rela.plt section. */
6472 if (!doneone)
6473 {
6474 if (!dyn)
6475 {
6476 if (h->type == STT_GNU_IFUNC)
6477 {
6478 s = htab->elf.irelplt;
6479 s->size += sizeof (Elf32_External_Rela);
6480 }
6481 else if (bfd_link_pic (info))
6482 {
6483 s = htab->relpltlocal;
6484 s->size += sizeof (Elf32_External_Rela);
6485 }
6486 }
6487 else
6488 {
6489 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6490
6491 if (htab->plt_type == PLT_VXWORKS)
6492 {
6493 /* Allocate space for the unloaded relocations. */
6494 if (!bfd_link_pic (info)
6495 && htab->elf.dynamic_sections_created)
6496 {
6497 if (ent->plt.offset
6498 == (bfd_vma) htab->plt_initial_entry_size)
6499 {
6500 htab->srelplt2->size
6501 += (sizeof (Elf32_External_Rela)
6502 * VXWORKS_PLTRESOLVE_RELOCS);
6503 }
6504
6505 htab->srelplt2->size
6506 += (sizeof (Elf32_External_Rela)
6507 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6508 }
6509
6510 /* Every PLT entry has an associated GOT entry in
6511 .got.plt. */
6512 htab->elf.sgotplt->size += 4;
6513 }
6514 }
6515 doneone = TRUE;
6516 }
6517 }
6518 else
6519 ent->plt.offset = (bfd_vma) -1;
6520
6521 if (!doneone)
6522 {
6523 h->plt.plist = NULL;
6524 h->needs_plt = 0;
6525 }
6526 }
6527 else
6528 {
6529 h->plt.plist = NULL;
6530 h->needs_plt = 0;
6531 }
6532
6533 return TRUE;
6534 }
6535
6536 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6537 read-only sections. */
6538
6539 static bfd_boolean
6540 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6541 {
6542 asection *sec;
6543
6544 if (h->root.type == bfd_link_hash_indirect)
6545 return TRUE;
6546
6547 sec = readonly_dynrelocs (h);
6548 if (sec != NULL)
6549 {
6550 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
6551
6552 info->flags |= DF_TEXTREL;
6553 info->callbacks->minfo
6554 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
6555 sec->owner, h->root.root.string, sec);
6556
6557 /* Not an error, just cut short the traversal. */
6558 return FALSE;
6559 }
6560 return TRUE;
6561 }
6562
6563 static const unsigned char glink_eh_frame_cie[] =
6564 {
6565 0, 0, 0, 16, /* length. */
6566 0, 0, 0, 0, /* id. */
6567 1, /* CIE version. */
6568 'z', 'R', 0, /* Augmentation string. */
6569 4, /* Code alignment. */
6570 0x7c, /* Data alignment. */
6571 65, /* RA reg. */
6572 1, /* Augmentation size. */
6573 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6574 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6575 };
6576
6577 /* Set the sizes of the dynamic sections. */
6578
6579 static bfd_boolean
6580 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6581 struct bfd_link_info *info)
6582 {
6583 struct ppc_elf_link_hash_table *htab;
6584 asection *s;
6585 bfd_boolean relocs;
6586 bfd *ibfd;
6587
6588 #ifdef DEBUG
6589 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6590 #endif
6591
6592 htab = ppc_elf_hash_table (info);
6593 BFD_ASSERT (htab->elf.dynobj != NULL);
6594
6595 if (elf_hash_table (info)->dynamic_sections_created)
6596 {
6597 /* Set the contents of the .interp section to the interpreter. */
6598 if (bfd_link_executable (info) && !info->nointerp)
6599 {
6600 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6601 BFD_ASSERT (s != NULL);
6602 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6603 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6604 }
6605 }
6606
6607 if (htab->plt_type == PLT_OLD)
6608 htab->got_header_size = 16;
6609 else if (htab->plt_type == PLT_NEW)
6610 htab->got_header_size = 12;
6611
6612 /* Set up .got offsets for local syms, and space for local dynamic
6613 relocs. */
6614 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6615 {
6616 bfd_signed_vma *local_got;
6617 bfd_signed_vma *end_local_got;
6618 struct plt_entry **local_plt;
6619 struct plt_entry **end_local_plt;
6620 char *lgot_masks;
6621 bfd_size_type locsymcount;
6622 Elf_Internal_Shdr *symtab_hdr;
6623
6624 if (!is_ppc_elf (ibfd))
6625 continue;
6626
6627 for (s = ibfd->sections; s != NULL; s = s->next)
6628 {
6629 struct ppc_dyn_relocs *p;
6630
6631 for (p = ((struct ppc_dyn_relocs *)
6632 elf_section_data (s)->local_dynrel);
6633 p != NULL;
6634 p = p->next)
6635 {
6636 if (!bfd_is_abs_section (p->sec)
6637 && bfd_is_abs_section (p->sec->output_section))
6638 {
6639 /* Input section has been discarded, either because
6640 it is a copy of a linkonce section or due to
6641 linker script /DISCARD/, so we'll be discarding
6642 the relocs too. */
6643 }
6644 else if (htab->is_vxworks
6645 && strcmp (p->sec->output_section->name,
6646 ".tls_vars") == 0)
6647 {
6648 /* Relocations in vxworks .tls_vars sections are
6649 handled specially by the loader. */
6650 }
6651 else if (p->count != 0)
6652 {
6653 asection *sreloc = elf_section_data (p->sec)->sreloc;
6654 if (p->ifunc)
6655 sreloc = htab->elf.irelplt;
6656 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6657 if ((p->sec->output_section->flags
6658 & (SEC_READONLY | SEC_ALLOC))
6659 == (SEC_READONLY | SEC_ALLOC))
6660 {
6661 info->flags |= DF_TEXTREL;
6662 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
6663 p->sec->owner, p->sec);
6664 }
6665 }
6666 }
6667 }
6668
6669 local_got = elf_local_got_refcounts (ibfd);
6670 if (!local_got)
6671 continue;
6672
6673 symtab_hdr = &elf_symtab_hdr (ibfd);
6674 locsymcount = symtab_hdr->sh_info;
6675 end_local_got = local_got + locsymcount;
6676 local_plt = (struct plt_entry **) end_local_got;
6677 end_local_plt = local_plt + locsymcount;
6678 lgot_masks = (char *) end_local_plt;
6679
6680 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6681 if (*local_got > 0)
6682 {
6683 unsigned int need;
6684 if ((*lgot_masks & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
6685 htab->tlsld_got.refcount += 1;
6686 need = got_entries_needed (*lgot_masks);
6687 if (need == 0)
6688 *local_got = (bfd_vma) -1;
6689 else
6690 {
6691 *local_got = allocate_got (htab, need);
6692 if (bfd_link_pic (info))
6693 {
6694 asection *srel;
6695 bfd_boolean tprel_known = bfd_link_executable (info);
6696
6697 need = got_relocs_needed (*lgot_masks, need, tprel_known);
6698 srel = htab->elf.srelgot;
6699 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6700 srel = htab->elf.irelplt;
6701 srel->size += need;
6702 }
6703 }
6704 }
6705 else
6706 *local_got = (bfd_vma) -1;
6707
6708 if (htab->is_vxworks)
6709 continue;
6710
6711 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6712 lgot_masks = (char *) end_local_plt;
6713 for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks)
6714 {
6715 struct plt_entry *ent;
6716 bfd_boolean doneone = FALSE;
6717 bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
6718
6719 for (ent = *local_plt; ent != NULL; ent = ent->next)
6720 if (ent->plt.refcount > 0)
6721 {
6722 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6723 s = htab->elf.iplt;
6724 else if (htab->can_convert_all_inline_plt
6725 || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)
6726 {
6727 ent->plt.offset = (bfd_vma) -1;
6728 continue;
6729 }
6730 else
6731 s = htab->pltlocal;
6732
6733 if (!doneone)
6734 {
6735 plt_offset = s->size;
6736 s->size += 4;
6737 }
6738 ent->plt.offset = plt_offset;
6739
6740 if (s != htab->pltlocal && (!doneone || bfd_link_pic (info)))
6741 {
6742 s = htab->glink;
6743 glink_offset = s->size;
6744 s->size += GLINK_ENTRY_SIZE (htab, NULL);
6745 }
6746 ent->glink_offset = glink_offset;
6747
6748 if (!doneone)
6749 {
6750 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6751 {
6752 s = htab->elf.irelplt;
6753 s->size += sizeof (Elf32_External_Rela);
6754 }
6755 else if (bfd_link_pic (info))
6756 {
6757 s = htab->relpltlocal;
6758 s->size += sizeof (Elf32_External_Rela);
6759 }
6760 doneone = TRUE;
6761 }
6762 }
6763 else
6764 ent->plt.offset = (bfd_vma) -1;
6765 }
6766 }
6767
6768 /* Allocate space for global sym dynamic relocs. */
6769 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6770
6771 if (htab->tlsld_got.refcount > 0)
6772 {
6773 htab->tlsld_got.offset = allocate_got (htab, 8);
6774 if (bfd_link_pic (info))
6775 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6776 }
6777 else
6778 htab->tlsld_got.offset = (bfd_vma) -1;
6779
6780 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6781 {
6782 unsigned int g_o_t = 32768;
6783
6784 /* If we haven't allocated the header, do so now. When we get here,
6785 for old plt/got the got size will be 0 to 32764 (not allocated),
6786 or 32780 to 65536 (header allocated). For new plt/got, the
6787 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6788 if (htab->elf.sgot->size <= 32768)
6789 {
6790 g_o_t = htab->elf.sgot->size;
6791 if (htab->plt_type == PLT_OLD)
6792 g_o_t += 4;
6793 htab->elf.sgot->size += htab->got_header_size;
6794 }
6795
6796 htab->elf.hgot->root.u.def.value = g_o_t;
6797 }
6798 if (bfd_link_pic (info))
6799 {
6800 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6801
6802 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6803 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6804 }
6805 if (info->emitrelocations)
6806 {
6807 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6808
6809 if (sda != NULL && sda->ref_regular)
6810 sda->root.u.def.section->flags |= SEC_KEEP;
6811 sda = htab->sdata[1].sym;
6812 if (sda != NULL && sda->ref_regular)
6813 sda->root.u.def.section->flags |= SEC_KEEP;
6814 }
6815
6816 if (htab->glink != NULL
6817 && htab->glink->size != 0
6818 && htab->elf.dynamic_sections_created)
6819 {
6820 htab->glink_pltresolve = htab->glink->size;
6821 /* Space for the branch table. */
6822 htab->glink->size
6823 += htab->elf.srelplt->size / (sizeof (Elf32_External_Rela) / 4) - 4;
6824 /* Pad out to align the start of PLTresolve. */
6825 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6826 ? 63 : 15);
6827 htab->glink->size += GLINK_PLTRESOLVE;
6828
6829 if (htab->params->emit_stub_syms)
6830 {
6831 struct elf_link_hash_entry *sh;
6832 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6833 TRUE, FALSE, FALSE);
6834 if (sh == NULL)
6835 return FALSE;
6836 if (sh->root.type == bfd_link_hash_new)
6837 {
6838 sh->root.type = bfd_link_hash_defined;
6839 sh->root.u.def.section = htab->glink;
6840 sh->root.u.def.value = htab->glink_pltresolve;
6841 sh->ref_regular = 1;
6842 sh->def_regular = 1;
6843 sh->ref_regular_nonweak = 1;
6844 sh->forced_local = 1;
6845 sh->non_elf = 0;
6846 sh->root.linker_def = 1;
6847 }
6848 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6849 TRUE, FALSE, FALSE);
6850 if (sh == NULL)
6851 return FALSE;
6852 if (sh->root.type == bfd_link_hash_new)
6853 {
6854 sh->root.type = bfd_link_hash_defined;
6855 sh->root.u.def.section = htab->glink;
6856 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6857 sh->ref_regular = 1;
6858 sh->def_regular = 1;
6859 sh->ref_regular_nonweak = 1;
6860 sh->forced_local = 1;
6861 sh->non_elf = 0;
6862 sh->root.linker_def = 1;
6863 }
6864 }
6865 }
6866
6867 if (htab->glink != NULL
6868 && htab->glink->size != 0
6869 && htab->glink_eh_frame != NULL
6870 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6871 && _bfd_elf_eh_frame_present (info))
6872 {
6873 s = htab->glink_eh_frame;
6874 s->size = sizeof (glink_eh_frame_cie) + 20;
6875 if (bfd_link_pic (info))
6876 {
6877 s->size += 4;
6878 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6879 s->size += 4;
6880 }
6881 }
6882
6883 /* We've now determined the sizes of the various dynamic sections.
6884 Allocate memory for them. */
6885 relocs = FALSE;
6886 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6887 {
6888 bfd_boolean strip_section = TRUE;
6889
6890 if ((s->flags & SEC_LINKER_CREATED) == 0)
6891 continue;
6892
6893 if (s == htab->elf.splt
6894 || s == htab->elf.sgot)
6895 {
6896 /* We'd like to strip these sections if they aren't needed, but if
6897 we've exported dynamic symbols from them we must leave them.
6898 It's too late to tell BFD to get rid of the symbols. */
6899 if (htab->elf.hplt != NULL)
6900 strip_section = FALSE;
6901 /* Strip this section if we don't need it; see the
6902 comment below. */
6903 }
6904 else if (s == htab->elf.iplt
6905 || s == htab->pltlocal
6906 || s == htab->glink
6907 || s == htab->glink_eh_frame
6908 || s == htab->elf.sgotplt
6909 || s == htab->sbss
6910 || s == htab->elf.sdynbss
6911 || s == htab->elf.sdynrelro
6912 || s == htab->dynsbss)
6913 {
6914 /* Strip these too. */
6915 }
6916 else if (s == htab->sdata[0].section
6917 || s == htab->sdata[1].section)
6918 {
6919 strip_section = (s->flags & SEC_KEEP) == 0;
6920 }
6921 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6922 ".rela"))
6923 {
6924 if (s->size != 0)
6925 {
6926 /* Remember whether there are any relocation sections. */
6927 relocs = TRUE;
6928
6929 /* We use the reloc_count field as a counter if we need
6930 to copy relocs into the output file. */
6931 s->reloc_count = 0;
6932 }
6933 }
6934 else
6935 {
6936 /* It's not one of our sections, so don't allocate space. */
6937 continue;
6938 }
6939
6940 if (s->size == 0 && strip_section)
6941 {
6942 /* If we don't need this section, strip it from the
6943 output file. This is mostly to handle .rela.bss and
6944 .rela.plt. We must create both sections in
6945 create_dynamic_sections, because they must be created
6946 before the linker maps input sections to output
6947 sections. The linker does that before
6948 adjust_dynamic_symbol is called, and it is that
6949 function which decides whether anything needs to go
6950 into these sections. */
6951 s->flags |= SEC_EXCLUDE;
6952 continue;
6953 }
6954
6955 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6956 continue;
6957
6958 /* Allocate memory for the section contents. */
6959 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6960 if (s->contents == NULL)
6961 return FALSE;
6962 }
6963
6964 if (htab->elf.dynamic_sections_created)
6965 {
6966 /* Add some entries to the .dynamic section. We fill in the
6967 values later, in ppc_elf_finish_dynamic_sections, but we
6968 must add the entries now so that we get the correct size for
6969 the .dynamic section. The DT_DEBUG entry is filled in by the
6970 dynamic linker and used by the debugger. */
6971 #define add_dynamic_entry(TAG, VAL) \
6972 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6973
6974 if (bfd_link_executable (info))
6975 {
6976 if (!add_dynamic_entry (DT_DEBUG, 0))
6977 return FALSE;
6978 }
6979
6980 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6981 {
6982 if (!add_dynamic_entry (DT_PLTGOT, 0)
6983 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6984 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6985 || !add_dynamic_entry (DT_JMPREL, 0))
6986 return FALSE;
6987 }
6988
6989 if (htab->plt_type == PLT_NEW
6990 && htab->glink != NULL
6991 && htab->glink->size != 0)
6992 {
6993 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6994 return FALSE;
6995 if (!htab->params->no_tls_get_addr_opt
6996 && htab->tls_get_addr != NULL
6997 && htab->tls_get_addr->plt.plist != NULL
6998 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6999 return FALSE;
7000 }
7001
7002 if (relocs)
7003 {
7004 if (!add_dynamic_entry (DT_RELA, 0)
7005 || !add_dynamic_entry (DT_RELASZ, 0)
7006 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
7007 return FALSE;
7008 }
7009
7010 /* If any dynamic relocs apply to a read-only section, then we
7011 need a DT_TEXTREL entry. */
7012 if ((info->flags & DF_TEXTREL) == 0)
7013 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
7014 info);
7015
7016 if ((info->flags & DF_TEXTREL) != 0)
7017 {
7018 if (!add_dynamic_entry (DT_TEXTREL, 0))
7019 return FALSE;
7020 }
7021 if (htab->is_vxworks
7022 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
7023 return FALSE;
7024 }
7025 #undef add_dynamic_entry
7026
7027 if (htab->glink_eh_frame != NULL
7028 && htab->glink_eh_frame->contents != NULL)
7029 {
7030 unsigned char *p = htab->glink_eh_frame->contents;
7031 bfd_vma val;
7032
7033 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
7034 /* CIE length (rewrite in case little-endian). */
7035 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
7036 p += sizeof (glink_eh_frame_cie);
7037 /* FDE length. */
7038 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
7039 bfd_put_32 (htab->elf.dynobj, val, p);
7040 p += 4;
7041 /* CIE pointer. */
7042 val = p - htab->glink_eh_frame->contents;
7043 bfd_put_32 (htab->elf.dynobj, val, p);
7044 p += 4;
7045 /* Offset to .glink. Set later. */
7046 p += 4;
7047 /* .glink size. */
7048 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
7049 p += 4;
7050 /* Augmentation. */
7051 p += 1;
7052
7053 if (bfd_link_pic (info)
7054 && htab->elf.dynamic_sections_created)
7055 {
7056 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
7057 if (adv < 64)
7058 *p++ = DW_CFA_advance_loc + adv;
7059 else if (adv < 256)
7060 {
7061 *p++ = DW_CFA_advance_loc1;
7062 *p++ = adv;
7063 }
7064 else if (adv < 65536)
7065 {
7066 *p++ = DW_CFA_advance_loc2;
7067 bfd_put_16 (htab->elf.dynobj, adv, p);
7068 p += 2;
7069 }
7070 else
7071 {
7072 *p++ = DW_CFA_advance_loc4;
7073 bfd_put_32 (htab->elf.dynobj, adv, p);
7074 p += 4;
7075 }
7076 *p++ = DW_CFA_register;
7077 *p++ = 65;
7078 p++;
7079 *p++ = DW_CFA_advance_loc + 4;
7080 *p++ = DW_CFA_restore_extended;
7081 *p++ = 65;
7082 }
7083 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
7084 == htab->glink_eh_frame->size);
7085 }
7086
7087 return TRUE;
7088 }
7089
7090 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
7091 if it looks like nothing is using them. */
7092
7093 static void
7094 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
7095 {
7096 struct elf_link_hash_entry *sda = lsect->sym;
7097
7098 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
7099 {
7100 asection *s;
7101
7102 s = bfd_get_section_by_name (output_bfd, lsect->name);
7103 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
7104 {
7105 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
7106 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
7107 {
7108 sda->def_regular = 0;
7109 /* This is somewhat magic. See elf_link_output_extsym. */
7110 sda->ref_dynamic = 1;
7111 sda->forced_local = 0;
7112 }
7113 }
7114 }
7115 }
7116
7117 void
7118 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
7119 {
7120 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7121
7122 if (htab != NULL)
7123 {
7124 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
7125 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
7126 }
7127 }
7128
7129
7130 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
7131
7132 static bfd_boolean
7133 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
7134 {
7135 if (h->plt.plist != NULL
7136 && !h->def_regular
7137 && (!h->pointer_equality_needed
7138 || !h->ref_regular_nonweak))
7139 return FALSE;
7140
7141 return _bfd_elf_hash_symbol (h);
7142 }
7143 \f
7144 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
7145
7146 /* Relaxation trampolines. r12 is available for clobbering (r11, is
7147 used for some functions that are allowed to break the ABI). */
7148 static const int shared_stub_entry[] =
7149 {
7150 0x7c0802a6, /* mflr 0 */
7151 0x429f0005, /* bcl 20, 31, .Lxxx */
7152 0x7d8802a6, /* mflr 12 */
7153 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
7154 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
7155 0x7c0803a6, /* mtlr 0 */
7156 0x7d8903a6, /* mtctr 12 */
7157 0x4e800420, /* bctr */
7158 };
7159
7160 static const int stub_entry[] =
7161 {
7162 0x3d800000, /* lis 12,xxx@ha */
7163 0x398c0000, /* addi 12,12,xxx@l */
7164 0x7d8903a6, /* mtctr 12 */
7165 0x4e800420, /* bctr */
7166 };
7167
7168 struct ppc_elf_relax_info
7169 {
7170 unsigned int workaround_size;
7171 unsigned int picfixup_size;
7172 };
7173
7174 /* This function implements long branch trampolines, and the ppc476
7175 icache bug workaround. Any section needing trampolines or patch
7176 space for the workaround has its size extended so that we can
7177 add trampolines at the end of the section. */
7178
7179 static bfd_boolean
7180 ppc_elf_relax_section (bfd *abfd,
7181 asection *isec,
7182 struct bfd_link_info *link_info,
7183 bfd_boolean *again)
7184 {
7185 struct one_branch_fixup
7186 {
7187 struct one_branch_fixup *next;
7188 asection *tsec;
7189 /* Final link, can use the symbol offset. For a
7190 relocatable link we use the symbol's index. */
7191 bfd_vma toff;
7192 bfd_vma trampoff;
7193 };
7194
7195 Elf_Internal_Shdr *symtab_hdr;
7196 bfd_byte *contents = NULL;
7197 Elf_Internal_Sym *isymbuf = NULL;
7198 Elf_Internal_Rela *internal_relocs = NULL;
7199 Elf_Internal_Rela *irel, *irelend = NULL;
7200 struct one_branch_fixup *branch_fixups = NULL;
7201 struct ppc_elf_relax_info *relax_info = NULL;
7202 unsigned changes = 0;
7203 bfd_boolean workaround_change;
7204 struct ppc_elf_link_hash_table *htab;
7205 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
7206 asection *got2;
7207 bfd_boolean maybe_pasted;
7208
7209 *again = FALSE;
7210
7211 /* No need to do anything with non-alloc or non-code sections. */
7212 if ((isec->flags & SEC_ALLOC) == 0
7213 || (isec->flags & SEC_CODE) == 0
7214 || (isec->flags & SEC_LINKER_CREATED) != 0
7215 || isec->size < 4)
7216 return TRUE;
7217
7218 /* We cannot represent the required PIC relocs in the output, so don't
7219 do anything. The linker doesn't support mixing -shared and -r
7220 anyway. */
7221 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
7222 return TRUE;
7223
7224 htab = ppc_elf_hash_table (link_info);
7225 if (htab == NULL)
7226 return TRUE;
7227
7228 isec->size = (isec->size + 3) & -4;
7229 if (isec->rawsize == 0)
7230 isec->rawsize = isec->size;
7231 trampbase = isec->size;
7232
7233 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
7234 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
7235 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
7236
7237 if (htab->params->ppc476_workaround
7238 || htab->params->pic_fixup > 0)
7239 {
7240 if (elf_section_data (isec)->sec_info == NULL)
7241 {
7242 elf_section_data (isec)->sec_info
7243 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
7244 if (elf_section_data (isec)->sec_info == NULL)
7245 return FALSE;
7246 }
7247 relax_info = elf_section_data (isec)->sec_info;
7248 trampbase -= relax_info->workaround_size;
7249 }
7250
7251 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
7252 || strcmp (isec->output_section->name, ".fini") == 0);
7253 /* Space for a branch around any trampolines. */
7254 trampoff = trampbase;
7255 if (maybe_pasted && trampbase == isec->rawsize)
7256 trampoff += 4;
7257
7258 symtab_hdr = &elf_symtab_hdr (abfd);
7259 picfixup_size = 0;
7260 if (htab->params->branch_trampolines
7261 || htab->params->pic_fixup > 0)
7262 {
7263 /* Get a copy of the native relocations. */
7264 if (isec->reloc_count != 0)
7265 {
7266 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
7267 link_info->keep_memory);
7268 if (internal_relocs == NULL)
7269 goto error_return;
7270 }
7271
7272 got2 = bfd_get_section_by_name (abfd, ".got2");
7273
7274 irelend = internal_relocs + isec->reloc_count;
7275 for (irel = internal_relocs; irel < irelend; irel++)
7276 {
7277 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7278 bfd_vma toff, roff;
7279 asection *tsec;
7280 struct one_branch_fixup *f;
7281 size_t insn_offset = 0;
7282 bfd_vma max_branch_offset = 0, val;
7283 bfd_byte *hit_addr;
7284 unsigned long t0;
7285 struct elf_link_hash_entry *h;
7286 Elf_Internal_Sym *isym;
7287 struct plt_entry **plist;
7288 unsigned char sym_type;
7289
7290 switch (r_type)
7291 {
7292 case R_PPC_REL24:
7293 case R_PPC_LOCAL24PC:
7294 case R_PPC_PLTREL24:
7295 case R_PPC_PLTCALL:
7296 max_branch_offset = 1 << 25;
7297 break;
7298
7299 case R_PPC_REL14:
7300 case R_PPC_REL14_BRTAKEN:
7301 case R_PPC_REL14_BRNTAKEN:
7302 max_branch_offset = 1 << 15;
7303 break;
7304
7305 case R_PPC_ADDR16_HA:
7306 if (htab->params->pic_fixup > 0)
7307 break;
7308 continue;
7309
7310 default:
7311 continue;
7312 }
7313
7314 /* Get the value of the symbol referred to by the reloc. */
7315 if (!get_sym_h (&h, &isym, &tsec, NULL, &isymbuf,
7316 ELF32_R_SYM (irel->r_info), abfd))
7317 goto error_return;
7318
7319 if (isym != NULL)
7320 {
7321 if (tsec != NULL)
7322 ;
7323 else if (isym->st_shndx == SHN_UNDEF)
7324 tsec = bfd_und_section_ptr;
7325 else if (isym->st_shndx == SHN_ABS)
7326 tsec = bfd_abs_section_ptr;
7327 else if (isym->st_shndx == SHN_COMMON)
7328 tsec = bfd_com_section_ptr;
7329
7330 toff = isym->st_value;
7331 sym_type = ELF_ST_TYPE (isym->st_info);
7332 }
7333 else
7334 {
7335 if (tsec != NULL)
7336 toff = h->root.u.def.value;
7337 else if (h->root.type == bfd_link_hash_undefined
7338 || h->root.type == bfd_link_hash_undefweak)
7339 {
7340 unsigned long indx;
7341
7342 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7343 tsec = bfd_und_section_ptr;
7344 toff = bfd_link_relocatable (link_info) ? indx : 0;
7345 }
7346 else
7347 continue;
7348
7349 /* If this branch is to __tls_get_addr then we may later
7350 optimise away the call. We won't be needing a long-
7351 branch stub in that case. */
7352 if (bfd_link_executable (link_info)
7353 && h == htab->tls_get_addr
7354 && irel != internal_relocs)
7355 {
7356 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7357 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7358 unsigned int tls_mask = 0;
7359
7360 /* The previous reloc should be one of R_PPC_TLSGD or
7361 R_PPC_TLSLD, or for older object files, a reloc
7362 on the __tls_get_addr arg setup insn. Get tls
7363 mask bits from the symbol on that reloc. */
7364 if (t_symndx < symtab_hdr->sh_info)
7365 {
7366 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7367
7368 if (local_got_offsets != NULL)
7369 {
7370 struct plt_entry **local_plt = (struct plt_entry **)
7371 (local_got_offsets + symtab_hdr->sh_info);
7372 char *lgot_masks = (char *)
7373 (local_plt + symtab_hdr->sh_info);
7374 tls_mask = lgot_masks[t_symndx];
7375 }
7376 }
7377 else
7378 {
7379 struct elf_link_hash_entry *th
7380 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7381
7382 while (th->root.type == bfd_link_hash_indirect
7383 || th->root.type == bfd_link_hash_warning)
7384 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7385
7386 tls_mask
7387 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7388 }
7389
7390 /* The mask bits tell us if the call will be
7391 optimised away. */
7392 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7393 && (t_rtype == R_PPC_TLSGD
7394 || t_rtype == R_PPC_GOT_TLSGD16
7395 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7396 continue;
7397 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7398 && (t_rtype == R_PPC_TLSLD
7399 || t_rtype == R_PPC_GOT_TLSLD16
7400 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7401 continue;
7402 }
7403
7404 sym_type = h->type;
7405 }
7406
7407 if (r_type == R_PPC_ADDR16_HA)
7408 {
7409 if (h != NULL
7410 && !h->def_regular
7411 && h->protected_def
7412 && ppc_elf_hash_entry (h)->has_addr16_ha
7413 && ppc_elf_hash_entry (h)->has_addr16_lo)
7414 picfixup_size += 12;
7415 continue;
7416 }
7417
7418 /* The condition here under which we call find_plt_ent must
7419 match that in relocate_section. If we call find_plt_ent here
7420 but not in relocate_section, or vice versa, then the branch
7421 destination used here may be incorrect. */
7422 plist = NULL;
7423 if (h != NULL)
7424 {
7425 /* We know is_branch_reloc (r_type) is true. */
7426 if (h->type == STT_GNU_IFUNC
7427 || r_type == R_PPC_PLTREL24)
7428 plist = &h->plt.plist;
7429 }
7430 else if (sym_type == STT_GNU_IFUNC
7431 && elf_local_got_offsets (abfd) != NULL)
7432 {
7433 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7434 struct plt_entry **local_plt = (struct plt_entry **)
7435 (local_got_offsets + symtab_hdr->sh_info);
7436 plist = local_plt + ELF32_R_SYM (irel->r_info);
7437 }
7438 if (plist != NULL)
7439 {
7440 bfd_vma addend = 0;
7441 struct plt_entry *ent;
7442
7443 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7444 addend = irel->r_addend;
7445 ent = find_plt_ent (plist, got2, addend);
7446 if (ent != NULL)
7447 {
7448 if (htab->plt_type == PLT_NEW
7449 || h == NULL
7450 || !htab->elf.dynamic_sections_created
7451 || h->dynindx == -1)
7452 {
7453 tsec = htab->glink;
7454 toff = ent->glink_offset;
7455 }
7456 else
7457 {
7458 tsec = htab->elf.splt;
7459 toff = ent->plt.offset;
7460 }
7461 }
7462 }
7463
7464 /* If the branch and target are in the same section, you have
7465 no hope of adding stubs. We'll error out later should the
7466 branch overflow. */
7467 if (tsec == isec)
7468 continue;
7469
7470 /* There probably isn't any reason to handle symbols in
7471 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7472 attribute for a code section, and we are only looking at
7473 branches. However, implement it correctly here as a
7474 reference for other target relax_section functions. */
7475 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7476 {
7477 /* At this stage in linking, no SEC_MERGE symbol has been
7478 adjusted, so all references to such symbols need to be
7479 passed through _bfd_merged_section_offset. (Later, in
7480 relocate_section, all SEC_MERGE symbols *except* for
7481 section symbols have been adjusted.)
7482
7483 gas may reduce relocations against symbols in SEC_MERGE
7484 sections to a relocation against the section symbol when
7485 the original addend was zero. When the reloc is against
7486 a section symbol we should include the addend in the
7487 offset passed to _bfd_merged_section_offset, since the
7488 location of interest is the original symbol. On the
7489 other hand, an access to "sym+addend" where "sym" is not
7490 a section symbol should not include the addend; Such an
7491 access is presumed to be an offset from "sym"; The
7492 location of interest is just "sym". */
7493 if (sym_type == STT_SECTION)
7494 toff += irel->r_addend;
7495
7496 toff
7497 = _bfd_merged_section_offset (abfd, &tsec,
7498 elf_section_data (tsec)->sec_info,
7499 toff);
7500
7501 if (sym_type != STT_SECTION)
7502 toff += irel->r_addend;
7503 }
7504 /* PLTREL24 addends are special. */
7505 else if (r_type != R_PPC_PLTREL24)
7506 toff += irel->r_addend;
7507
7508 /* Attempted -shared link of non-pic code loses. */
7509 if ((!bfd_link_relocatable (link_info)
7510 && tsec == bfd_und_section_ptr)
7511 || tsec->output_section == NULL
7512 || (tsec->owner != NULL
7513 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7514 continue;
7515
7516 roff = irel->r_offset;
7517
7518 /* If the branch is in range, no need to do anything. */
7519 if (tsec != bfd_und_section_ptr
7520 && (!bfd_link_relocatable (link_info)
7521 /* A relocatable link may have sections moved during
7522 final link, so do not presume they remain in range. */
7523 || tsec->output_section == isec->output_section))
7524 {
7525 bfd_vma symaddr, reladdr;
7526
7527 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7528 reladdr = isec->output_section->vma + isec->output_offset + roff;
7529 if (symaddr - reladdr + max_branch_offset
7530 < 2 * max_branch_offset)
7531 continue;
7532 }
7533
7534 /* Look for an existing fixup to this address. */
7535 for (f = branch_fixups; f ; f = f->next)
7536 if (f->tsec == tsec && f->toff == toff)
7537 break;
7538
7539 if (f == NULL)
7540 {
7541 size_t size;
7542 unsigned long stub_rtype;
7543
7544 val = trampoff - roff;
7545 if (val >= max_branch_offset)
7546 /* Oh dear, we can't reach a trampoline. Don't try to add
7547 one. We'll report an error later. */
7548 continue;
7549
7550 if (bfd_link_pic (link_info))
7551 {
7552 size = 4 * ARRAY_SIZE (shared_stub_entry);
7553 insn_offset = 12;
7554 }
7555 else
7556 {
7557 size = 4 * ARRAY_SIZE (stub_entry);
7558 insn_offset = 0;
7559 }
7560 stub_rtype = R_PPC_RELAX;
7561 if (tsec == htab->elf.splt
7562 || tsec == htab->glink)
7563 {
7564 stub_rtype = R_PPC_RELAX_PLT;
7565 if (r_type == R_PPC_PLTREL24)
7566 stub_rtype = R_PPC_RELAX_PLTREL24;
7567 }
7568
7569 /* Hijack the old relocation. Since we need two
7570 relocations for this use a "composite" reloc. */
7571 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7572 stub_rtype);
7573 irel->r_offset = trampoff + insn_offset;
7574 if (r_type == R_PPC_PLTREL24
7575 && stub_rtype != R_PPC_RELAX_PLTREL24)
7576 irel->r_addend = 0;
7577
7578 /* Record the fixup so we don't do it again this section. */
7579 f = bfd_malloc (sizeof (*f));
7580 f->next = branch_fixups;
7581 f->tsec = tsec;
7582 f->toff = toff;
7583 f->trampoff = trampoff;
7584 branch_fixups = f;
7585
7586 trampoff += size;
7587 changes++;
7588 }
7589 else
7590 {
7591 val = f->trampoff - roff;
7592 if (val >= max_branch_offset)
7593 continue;
7594
7595 /* Nop out the reloc, since we're finalizing things here. */
7596 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7597 }
7598
7599 /* Get the section contents. */
7600 if (contents == NULL)
7601 {
7602 /* Get cached copy if it exists. */
7603 if (elf_section_data (isec)->this_hdr.contents != NULL)
7604 contents = elf_section_data (isec)->this_hdr.contents;
7605 /* Go get them off disk. */
7606 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7607 goto error_return;
7608 }
7609
7610 /* Fix up the existing branch to hit the trampoline. */
7611 hit_addr = contents + roff;
7612 switch (r_type)
7613 {
7614 case R_PPC_REL24:
7615 case R_PPC_LOCAL24PC:
7616 case R_PPC_PLTREL24:
7617 t0 = bfd_get_32 (abfd, hit_addr);
7618 t0 &= ~0x3fffffc;
7619 t0 |= val & 0x3fffffc;
7620 bfd_put_32 (abfd, t0, hit_addr);
7621 break;
7622
7623 case R_PPC_REL14:
7624 case R_PPC_REL14_BRTAKEN:
7625 case R_PPC_REL14_BRNTAKEN:
7626 t0 = bfd_get_32 (abfd, hit_addr);
7627 t0 &= ~0xfffc;
7628 t0 |= val & 0xfffc;
7629 bfd_put_32 (abfd, t0, hit_addr);
7630 break;
7631 }
7632 }
7633
7634 while (branch_fixups != NULL)
7635 {
7636 struct one_branch_fixup *f = branch_fixups;
7637 branch_fixups = branch_fixups->next;
7638 free (f);
7639 }
7640 }
7641
7642 workaround_change = FALSE;
7643 newsize = trampoff;
7644 if (htab->params->ppc476_workaround
7645 && (!bfd_link_relocatable (link_info)
7646 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7647 {
7648 bfd_vma addr, end_addr;
7649 unsigned int crossings;
7650 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7651
7652 addr = isec->output_section->vma + isec->output_offset;
7653 end_addr = addr + trampoff;
7654 addr &= -pagesize;
7655 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7656 if (crossings != 0)
7657 {
7658 /* Keep space aligned, to ensure the patch code itself does
7659 not cross a page. Don't decrease size calculated on a
7660 previous pass as otherwise we might never settle on a layout. */
7661 newsize = 15 - ((end_addr - 1) & 15);
7662 newsize += crossings * 16;
7663 if (relax_info->workaround_size < newsize)
7664 {
7665 relax_info->workaround_size = newsize;
7666 workaround_change = TRUE;
7667 }
7668 /* Ensure relocate_section is called. */
7669 isec->flags |= SEC_RELOC;
7670 }
7671 newsize = trampoff + relax_info->workaround_size;
7672 }
7673
7674 if (htab->params->pic_fixup > 0)
7675 {
7676 picfixup_size -= relax_info->picfixup_size;
7677 if (picfixup_size != 0)
7678 relax_info->picfixup_size += picfixup_size;
7679 newsize += relax_info->picfixup_size;
7680 }
7681
7682 if (changes != 0 || picfixup_size != 0 || workaround_change)
7683 isec->size = newsize;
7684
7685 if (isymbuf != NULL
7686 && symtab_hdr->contents != (unsigned char *) isymbuf)
7687 {
7688 if (! link_info->keep_memory)
7689 free (isymbuf);
7690 else
7691 {
7692 /* Cache the symbols for elf_link_input_bfd. */
7693 symtab_hdr->contents = (unsigned char *) isymbuf;
7694 }
7695 }
7696
7697 if (contents != NULL
7698 && elf_section_data (isec)->this_hdr.contents != contents)
7699 {
7700 if (!changes && !link_info->keep_memory)
7701 free (contents);
7702 else
7703 {
7704 /* Cache the section contents for elf_link_input_bfd. */
7705 elf_section_data (isec)->this_hdr.contents = contents;
7706 }
7707 }
7708
7709 changes += picfixup_size;
7710 if (changes != 0)
7711 {
7712 /* Append sufficient NOP relocs so we can write out relocation
7713 information for the trampolines. */
7714 Elf_Internal_Shdr *rel_hdr;
7715 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7716 * sizeof (*new_relocs));
7717 unsigned ix;
7718
7719 if (!new_relocs)
7720 goto error_return;
7721 memcpy (new_relocs, internal_relocs,
7722 isec->reloc_count * sizeof (*new_relocs));
7723 for (ix = changes; ix--;)
7724 {
7725 irel = new_relocs + ix + isec->reloc_count;
7726
7727 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7728 }
7729 if (internal_relocs != elf_section_data (isec)->relocs)
7730 free (internal_relocs);
7731 elf_section_data (isec)->relocs = new_relocs;
7732 isec->reloc_count += changes;
7733 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7734 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7735 }
7736 else if (internal_relocs != NULL
7737 && elf_section_data (isec)->relocs != internal_relocs)
7738 free (internal_relocs);
7739
7740 *again = changes != 0 || workaround_change;
7741 return TRUE;
7742
7743 error_return:
7744 while (branch_fixups != NULL)
7745 {
7746 struct one_branch_fixup *f = branch_fixups;
7747 branch_fixups = branch_fixups->next;
7748 free (f);
7749 }
7750 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7751 free (isymbuf);
7752 if (contents != NULL
7753 && elf_section_data (isec)->this_hdr.contents != contents)
7754 free (contents);
7755 if (internal_relocs != NULL
7756 && elf_section_data (isec)->relocs != internal_relocs)
7757 free (internal_relocs);
7758 return FALSE;
7759 }
7760 \f
7761 /* What to do when ld finds relocations against symbols defined in
7762 discarded sections. */
7763
7764 static unsigned int
7765 ppc_elf_action_discarded (asection *sec)
7766 {
7767 if (strcmp (".fixup", sec->name) == 0)
7768 return 0;
7769
7770 if (strcmp (".got2", sec->name) == 0)
7771 return 0;
7772
7773 return _bfd_elf_default_action_discarded (sec);
7774 }
7775 \f
7776 /* Fill in the address for a pointer generated in a linker section. */
7777
7778 static bfd_vma
7779 elf_finish_pointer_linker_section (bfd *input_bfd,
7780 elf_linker_section_t *lsect,
7781 struct elf_link_hash_entry *h,
7782 bfd_vma relocation,
7783 const Elf_Internal_Rela *rel)
7784 {
7785 elf_linker_section_pointers_t *linker_section_ptr;
7786
7787 BFD_ASSERT (lsect != NULL);
7788
7789 if (h != NULL)
7790 {
7791 /* Handle global symbol. */
7792 struct ppc_elf_link_hash_entry *eh;
7793
7794 eh = (struct ppc_elf_link_hash_entry *) h;
7795 BFD_ASSERT (eh->elf.def_regular);
7796 linker_section_ptr = eh->linker_section_pointer;
7797 }
7798 else
7799 {
7800 /* Handle local symbol. */
7801 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7802
7803 BFD_ASSERT (is_ppc_elf (input_bfd));
7804 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7805 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7806 }
7807
7808 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7809 rel->r_addend,
7810 lsect);
7811 BFD_ASSERT (linker_section_ptr != NULL);
7812
7813 /* Offset will always be a multiple of four, so use the bottom bit
7814 as a "written" flag. */
7815 if ((linker_section_ptr->offset & 1) == 0)
7816 {
7817 bfd_put_32 (lsect->section->owner,
7818 relocation + linker_section_ptr->addend,
7819 lsect->section->contents + linker_section_ptr->offset);
7820 linker_section_ptr->offset += 1;
7821 }
7822
7823 relocation = (lsect->section->output_section->vma
7824 + lsect->section->output_offset
7825 + linker_section_ptr->offset - 1
7826 - SYM_VAL (lsect->sym));
7827
7828 #ifdef DEBUG
7829 fprintf (stderr,
7830 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7831 lsect->name, (long) relocation, (long) relocation);
7832 #endif
7833
7834 return relocation;
7835 }
7836
7837 #define PPC_LO(v) ((v) & 0xffff)
7838 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7839 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7840
7841 static void
7842 write_glink_stub (struct elf_link_hash_entry *h, struct plt_entry *ent,
7843 asection *plt_sec, unsigned char *p,
7844 struct bfd_link_info *info)
7845 {
7846 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7847 bfd *output_bfd = info->output_bfd;
7848 bfd_vma plt;
7849 unsigned char *end = p + GLINK_ENTRY_SIZE (htab, h);
7850
7851 if (h != NULL
7852 && h == htab->tls_get_addr
7853 && !htab->params->no_tls_get_addr_opt)
7854 {
7855 bfd_put_32 (output_bfd, LWZ_11_3, p);
7856 p += 4;
7857 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
7858 p += 4;
7859 bfd_put_32 (output_bfd, MR_0_3, p);
7860 p += 4;
7861 bfd_put_32 (output_bfd, CMPWI_11_0, p);
7862 p += 4;
7863 bfd_put_32 (output_bfd, ADD_3_12_2, p);
7864 p += 4;
7865 bfd_put_32 (output_bfd, BEQLR, p);
7866 p += 4;
7867 bfd_put_32 (output_bfd, MR_3_0, p);
7868 p += 4;
7869 bfd_put_32 (output_bfd, NOP, p);
7870 p += 4;
7871 }
7872
7873 plt = ((ent->plt.offset & ~1)
7874 + plt_sec->output_section->vma
7875 + plt_sec->output_offset);
7876
7877 if (bfd_link_pic (info))
7878 {
7879 bfd_vma got = 0;
7880
7881 if (ent->addend >= 32768)
7882 got = (ent->addend
7883 + ent->sec->output_section->vma
7884 + ent->sec->output_offset);
7885 else if (htab->elf.hgot != NULL)
7886 got = SYM_VAL (htab->elf.hgot);
7887
7888 plt -= got;
7889
7890 if (plt + 0x8000 < 0x10000)
7891 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7892 else
7893 {
7894 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7895 p += 4;
7896 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7897 }
7898 }
7899 else
7900 {
7901 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7902 p += 4;
7903 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7904 }
7905 p += 4;
7906 bfd_put_32 (output_bfd, MTCTR_11, p);
7907 p += 4;
7908 bfd_put_32 (output_bfd, BCTR, p);
7909 p += 4;
7910 while (p < end)
7911 {
7912 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7913 p += 4;
7914 }
7915 }
7916
7917 /* Return true if symbol is defined statically. */
7918
7919 static bfd_boolean
7920 is_static_defined (struct elf_link_hash_entry *h)
7921 {
7922 return ((h->root.type == bfd_link_hash_defined
7923 || h->root.type == bfd_link_hash_defweak)
7924 && h->root.u.def.section != NULL
7925 && h->root.u.def.section->output_section != NULL);
7926 }
7927
7928 /* If INSN is an opcode that may be used with an @tls operand, return
7929 the transformed insn for TLS optimisation, otherwise return 0. If
7930 REG is non-zero only match an insn with RB or RA equal to REG. */
7931
7932 unsigned int
7933 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7934 {
7935 unsigned int rtra;
7936
7937 if ((insn & (0x3f << 26)) != 31 << 26)
7938 return 0;
7939
7940 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7941 rtra = insn & ((1 << 26) - (1 << 16));
7942 else if (((insn >> 16) & 0x1f) == reg)
7943 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7944 else
7945 return 0;
7946
7947 if ((insn & (0x3ff << 1)) == 266 << 1)
7948 /* add -> addi. */
7949 insn = 14 << 26;
7950 else if ((insn & (0x1f << 1)) == 23 << 1
7951 && ((insn & (0x1f << 6)) < 14 << 6
7952 || ((insn & (0x1f << 6)) >= 16 << 6
7953 && (insn & (0x1f << 6)) < 24 << 6)))
7954 /* load and store indexed -> dform. */
7955 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7956 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7957 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7958 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7959 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7960 /* lwax -> lwa. */
7961 insn = (58 << 26) | 2;
7962 else
7963 return 0;
7964 insn |= rtra;
7965 return insn;
7966 }
7967
7968 /* If INSN is an opcode that may be used with an @tprel operand, return
7969 the transformed insn for an undefined weak symbol, ie. with the
7970 thread pointer REG operand removed. Otherwise return 0. */
7971
7972 unsigned int
7973 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7974 {
7975 if ((insn & (0x1f << 16)) == reg << 16
7976 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7977 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7978 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7979 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7980 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7981 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7982 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7983 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7984 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7985 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7986 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7987 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7988 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7989 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7990 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7991 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7992 && (insn & 3) != 1)
7993 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7994 && ((insn & 3) == 0 || (insn & 3) == 3))))
7995 {
7996 insn &= ~(0x1f << 16);
7997 }
7998 else if ((insn & (0x1f << 21)) == reg << 21
7999 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
8000 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
8001 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
8002 {
8003 insn &= ~(0x1f << 21);
8004 insn |= (insn & (0x1f << 16)) << 5;
8005 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
8006 insn -= 2 >> 26; /* convert to ori,oris */
8007 }
8008 else
8009 insn = 0;
8010 return insn;
8011 }
8012
8013 static bfd_boolean
8014 is_insn_ds_form (unsigned int insn)
8015 {
8016 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8017 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8018 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
8019 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
8020 }
8021
8022 static bfd_boolean
8023 is_insn_dq_form (unsigned int insn)
8024 {
8025 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
8026 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8027 && (insn & 3) == 1));
8028 }
8029
8030 /* The RELOCATE_SECTION function is called by the ELF backend linker
8031 to handle the relocations for a section.
8032
8033 The relocs are always passed as Rela structures; if the section
8034 actually uses Rel structures, the r_addend field will always be
8035 zero.
8036
8037 This function is responsible for adjust the section contents as
8038 necessary, and (if using Rela relocs and generating a
8039 relocatable output file) adjusting the reloc addend as
8040 necessary.
8041
8042 This function does not have to worry about setting the reloc
8043 address or the reloc symbol index.
8044
8045 LOCAL_SYMS is a pointer to the swapped in local symbols.
8046
8047 LOCAL_SECTIONS is an array giving the section in the input file
8048 corresponding to the st_shndx field of each local symbol.
8049
8050 The global hash table entry for the global symbols can be found
8051 via elf_sym_hashes (input_bfd).
8052
8053 When generating relocatable output, this function must handle
8054 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
8055 going to be the section symbol corresponding to the output
8056 section, which means that the addend must be adjusted
8057 accordingly. */
8058
8059 static bfd_boolean
8060 ppc_elf_relocate_section (bfd *output_bfd,
8061 struct bfd_link_info *info,
8062 bfd *input_bfd,
8063 asection *input_section,
8064 bfd_byte *contents,
8065 Elf_Internal_Rela *relocs,
8066 Elf_Internal_Sym *local_syms,
8067 asection **local_sections)
8068 {
8069 Elf_Internal_Shdr *symtab_hdr;
8070 struct elf_link_hash_entry **sym_hashes;
8071 struct ppc_elf_link_hash_table *htab;
8072 Elf_Internal_Rela *rel;
8073 Elf_Internal_Rela *wrel;
8074 Elf_Internal_Rela *relend;
8075 Elf_Internal_Rela outrel;
8076 asection *got2;
8077 bfd_vma *local_got_offsets;
8078 bfd_boolean ret = TRUE;
8079 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
8080 bfd_boolean is_vxworks_tls;
8081 unsigned int picfixup_size = 0;
8082 struct ppc_elf_relax_info *relax_info = NULL;
8083
8084 #ifdef DEBUG
8085 _bfd_error_handler ("ppc_elf_relocate_section called for %pB section %pA, "
8086 "%ld relocations%s",
8087 input_bfd, input_section,
8088 (long) input_section->reloc_count,
8089 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
8090 #endif
8091
8092 got2 = bfd_get_section_by_name (input_bfd, ".got2");
8093
8094 /* Initialize howto table if not already done. */
8095 if (!ppc_elf_howto_table[R_PPC_ADDR32])
8096 ppc_elf_howto_init ();
8097
8098 htab = ppc_elf_hash_table (info);
8099 local_got_offsets = elf_local_got_offsets (input_bfd);
8100 symtab_hdr = &elf_symtab_hdr (input_bfd);
8101 sym_hashes = elf_sym_hashes (input_bfd);
8102 /* We have to handle relocations in vxworks .tls_vars sections
8103 specially, because the dynamic loader is 'weird'. */
8104 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
8105 && !strcmp (input_section->output_section->name,
8106 ".tls_vars"));
8107 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
8108 relax_info = elf_section_data (input_section)->sec_info;
8109 rel = wrel = relocs;
8110 relend = relocs + input_section->reloc_count;
8111 for (; rel < relend; wrel++, rel++)
8112 {
8113 enum elf_ppc_reloc_type r_type;
8114 bfd_vma addend;
8115 bfd_reloc_status_type r;
8116 Elf_Internal_Sym *sym;
8117 asection *sec;
8118 struct elf_link_hash_entry *h;
8119 const char *sym_name;
8120 reloc_howto_type *howto;
8121 unsigned long r_symndx;
8122 bfd_vma relocation;
8123 bfd_vma branch_bit, from;
8124 bfd_boolean unresolved_reloc, save_unresolved_reloc;
8125 bfd_boolean warned;
8126 unsigned int tls_type, tls_mask, tls_gd;
8127 struct plt_entry **ifunc, **plt_list;
8128 struct reloc_howto_struct alt_howto;
8129
8130 again:
8131 r_type = ELF32_R_TYPE (rel->r_info);
8132 sym = NULL;
8133 sec = NULL;
8134 h = NULL;
8135 unresolved_reloc = FALSE;
8136 warned = FALSE;
8137 r_symndx = ELF32_R_SYM (rel->r_info);
8138
8139 if (r_symndx < symtab_hdr->sh_info)
8140 {
8141 sym = local_syms + r_symndx;
8142 sec = local_sections[r_symndx];
8143 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
8144
8145 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
8146 }
8147 else
8148 {
8149 bfd_boolean ignored;
8150
8151 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
8152 r_symndx, symtab_hdr, sym_hashes,
8153 h, sec, relocation,
8154 unresolved_reloc, warned, ignored);
8155
8156 sym_name = h->root.root.string;
8157 }
8158
8159 if (sec != NULL && discarded_section (sec))
8160 {
8161 /* For relocs against symbols from removed linkonce sections,
8162 or sections discarded by a linker script, we just want the
8163 section contents zeroed. Avoid any special processing. */
8164 howto = NULL;
8165 if (r_type < R_PPC_max)
8166 howto = ppc_elf_howto_table[r_type];
8167
8168 _bfd_clear_contents (howto, input_bfd, input_section,
8169 contents + rel->r_offset);
8170 wrel->r_offset = rel->r_offset;
8171 wrel->r_info = 0;
8172 wrel->r_addend = 0;
8173
8174 /* For ld -r, remove relocations in debug sections against
8175 symbols defined in discarded sections. Not done for
8176 non-debug to preserve relocs in .eh_frame which the
8177 eh_frame editing code expects to be present. */
8178 if (bfd_link_relocatable (info)
8179 && (input_section->flags & SEC_DEBUGGING))
8180 wrel--;
8181
8182 continue;
8183 }
8184
8185 if (bfd_link_relocatable (info))
8186 {
8187 if (got2 != NULL
8188 && r_type == R_PPC_PLTREL24
8189 && rel->r_addend != 0)
8190 {
8191 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8192 addend specifies the GOT pointer offset within .got2. */
8193 rel->r_addend += got2->output_offset;
8194 }
8195 if (r_type != R_PPC_RELAX_PLT
8196 && r_type != R_PPC_RELAX_PLTREL24
8197 && r_type != R_PPC_RELAX)
8198 goto copy_reloc;
8199 }
8200
8201 /* TLS optimizations. Replace instruction sequences and relocs
8202 based on information we collected in tls_optimize. We edit
8203 RELOCS so that --emit-relocs will output something sensible
8204 for the final instruction stream. */
8205 tls_mask = 0;
8206 tls_gd = 0;
8207 if (h != NULL)
8208 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
8209 else if (local_got_offsets != NULL)
8210 {
8211 struct plt_entry **local_plt;
8212 char *lgot_masks;
8213 local_plt
8214 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
8215 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
8216 tls_mask = lgot_masks[r_symndx];
8217 }
8218
8219 /* Ensure reloc mapping code below stays sane. */
8220 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
8221 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
8222 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
8223 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
8224 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
8225 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
8226 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
8227 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
8228 abort ();
8229 switch (r_type)
8230 {
8231 default:
8232 break;
8233
8234 case R_PPC_GOT_TPREL16:
8235 case R_PPC_GOT_TPREL16_LO:
8236 if ((tls_mask & TLS_TLS) != 0
8237 && (tls_mask & TLS_TPREL) == 0)
8238 {
8239 bfd_vma insn;
8240
8241 insn = bfd_get_32 (input_bfd,
8242 contents + rel->r_offset - d_offset);
8243 insn &= 31 << 21;
8244 insn |= 0x3c020000; /* addis 0,2,0 */
8245 bfd_put_32 (input_bfd, insn,
8246 contents + rel->r_offset - d_offset);
8247 r_type = R_PPC_TPREL16_HA;
8248 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8249 }
8250 break;
8251
8252 case R_PPC_TLS:
8253 if ((tls_mask & TLS_TLS) != 0
8254 && (tls_mask & TLS_TPREL) == 0)
8255 {
8256 bfd_vma insn;
8257
8258 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8259 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
8260 if (insn == 0)
8261 abort ();
8262 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8263 r_type = R_PPC_TPREL16_LO;
8264 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8265
8266 /* Was PPC_TLS which sits on insn boundary, now
8267 PPC_TPREL16_LO which is at low-order half-word. */
8268 rel->r_offset += d_offset;
8269 }
8270 break;
8271
8272 case R_PPC_GOT_TLSGD16_HI:
8273 case R_PPC_GOT_TLSGD16_HA:
8274 tls_gd = TLS_TPRELGD;
8275 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8276 goto tls_gdld_hi;
8277 break;
8278
8279 case R_PPC_GOT_TLSLD16_HI:
8280 case R_PPC_GOT_TLSLD16_HA:
8281 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8282 {
8283 tls_gdld_hi:
8284 if ((tls_mask & tls_gd) != 0)
8285 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8286 + R_PPC_GOT_TPREL16);
8287 else
8288 {
8289 rel->r_offset -= d_offset;
8290 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8291 r_type = R_PPC_NONE;
8292 }
8293 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8294 }
8295 break;
8296
8297 case R_PPC_GOT_TLSGD16:
8298 case R_PPC_GOT_TLSGD16_LO:
8299 tls_gd = TLS_TPRELGD;
8300 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8301 goto tls_ldgd_opt;
8302 break;
8303
8304 case R_PPC_GOT_TLSLD16:
8305 case R_PPC_GOT_TLSLD16_LO:
8306 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8307 {
8308 unsigned int insn1, insn2;
8309 bfd_vma offset;
8310
8311 tls_ldgd_opt:
8312 offset = (bfd_vma) -1;
8313 /* If not using the newer R_PPC_TLSGD/LD to mark
8314 __tls_get_addr calls, we must trust that the call
8315 stays with its arg setup insns, ie. that the next
8316 reloc is the __tls_get_addr call associated with
8317 the current reloc. Edit both insns. */
8318 if (input_section->has_tls_get_addr_call
8319 && rel + 1 < relend
8320 && branch_reloc_hash_match (input_bfd, rel + 1,
8321 htab->tls_get_addr))
8322 offset = rel[1].r_offset;
8323 /* We read the low GOT_TLS insn because we need to keep
8324 the destination reg. It may be something other than
8325 the usual r3, and moved to r3 before the call by
8326 intervening code. */
8327 insn1 = bfd_get_32 (input_bfd,
8328 contents + rel->r_offset - d_offset);
8329 if ((tls_mask & tls_gd) != 0)
8330 {
8331 /* IE */
8332 insn1 &= (0x1f << 21) | (0x1f << 16);
8333 insn1 |= 32 << 26; /* lwz */
8334 if (offset != (bfd_vma) -1)
8335 {
8336 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8337 insn2 = 0x7c631214; /* add 3,3,2 */
8338 bfd_put_32 (input_bfd, insn2, contents + offset);
8339 }
8340 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8341 + R_PPC_GOT_TPREL16);
8342 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8343 }
8344 else
8345 {
8346 /* LE */
8347 insn1 &= 0x1f << 21;
8348 insn1 |= 0x3c020000; /* addis r,2,0 */
8349 if (tls_gd == 0)
8350 {
8351 /* Was an LD reloc. */
8352 for (r_symndx = 0;
8353 r_symndx < symtab_hdr->sh_info;
8354 r_symndx++)
8355 if (local_sections[r_symndx] == sec)
8356 break;
8357 if (r_symndx >= symtab_hdr->sh_info)
8358 r_symndx = STN_UNDEF;
8359 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8360 if (r_symndx != STN_UNDEF)
8361 rel->r_addend -= (local_syms[r_symndx].st_value
8362 + sec->output_offset
8363 + sec->output_section->vma);
8364 }
8365 r_type = R_PPC_TPREL16_HA;
8366 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8367 if (offset != (bfd_vma) -1)
8368 {
8369 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8370 rel[1].r_offset = offset + d_offset;
8371 rel[1].r_addend = rel->r_addend;
8372 insn2 = 0x38630000; /* addi 3,3,0 */
8373 bfd_put_32 (input_bfd, insn2, contents + offset);
8374 }
8375 }
8376 bfd_put_32 (input_bfd, insn1,
8377 contents + rel->r_offset - d_offset);
8378 if (tls_gd == 0)
8379 {
8380 /* We changed the symbol on an LD reloc. Start over
8381 in order to get h, sym, sec etc. right. */
8382 goto again;
8383 }
8384 }
8385 break;
8386
8387 case R_PPC_TLSGD:
8388 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
8389 && rel + 1 < relend)
8390 {
8391 unsigned int insn2;
8392 bfd_vma offset = rel->r_offset;
8393
8394 if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
8395 {
8396 bfd_put_32 (input_bfd, NOP, contents + offset);
8397 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8398 break;
8399 }
8400
8401 if ((tls_mask & TLS_TPRELGD) != 0)
8402 {
8403 /* IE */
8404 r_type = R_PPC_NONE;
8405 insn2 = 0x7c631214; /* add 3,3,2 */
8406 }
8407 else
8408 {
8409 /* LE */
8410 r_type = R_PPC_TPREL16_LO;
8411 rel->r_offset += d_offset;
8412 insn2 = 0x38630000; /* addi 3,3,0 */
8413 }
8414 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8415 bfd_put_32 (input_bfd, insn2, contents + offset);
8416 /* Zap the reloc on the _tls_get_addr call too. */
8417 BFD_ASSERT (offset == rel[1].r_offset);
8418 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8419 }
8420 break;
8421
8422 case R_PPC_TLSLD:
8423 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
8424 && rel + 1 < relend)
8425 {
8426 unsigned int insn2;
8427
8428 if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
8429 {
8430 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8431 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8432 break;
8433 }
8434
8435 for (r_symndx = 0;
8436 r_symndx < symtab_hdr->sh_info;
8437 r_symndx++)
8438 if (local_sections[r_symndx] == sec)
8439 break;
8440 if (r_symndx >= symtab_hdr->sh_info)
8441 r_symndx = STN_UNDEF;
8442 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8443 if (r_symndx != STN_UNDEF)
8444 rel->r_addend -= (local_syms[r_symndx].st_value
8445 + sec->output_offset
8446 + sec->output_section->vma);
8447
8448 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8449 rel->r_offset += d_offset;
8450 insn2 = 0x38630000; /* addi 3,3,0 */
8451 bfd_put_32 (input_bfd, insn2,
8452 contents + rel->r_offset - d_offset);
8453 /* Zap the reloc on the _tls_get_addr call too. */
8454 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8455 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8456 goto again;
8457 }
8458 break;
8459 }
8460
8461 /* Handle other relocations that tweak non-addend part of insn. */
8462 branch_bit = 0;
8463 switch (r_type)
8464 {
8465 default:
8466 break;
8467
8468 /* Branch taken prediction relocations. */
8469 case R_PPC_ADDR14_BRTAKEN:
8470 case R_PPC_REL14_BRTAKEN:
8471 branch_bit = BRANCH_PREDICT_BIT;
8472 /* Fall through. */
8473
8474 /* Branch not taken prediction relocations. */
8475 case R_PPC_ADDR14_BRNTAKEN:
8476 case R_PPC_REL14_BRNTAKEN:
8477 {
8478 unsigned int insn;
8479
8480 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8481 insn &= ~BRANCH_PREDICT_BIT;
8482 insn |= branch_bit;
8483
8484 from = (rel->r_offset
8485 + input_section->output_offset
8486 + input_section->output_section->vma);
8487
8488 /* Invert 'y' bit if not the default. */
8489 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8490 insn ^= BRANCH_PREDICT_BIT;
8491
8492 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8493 }
8494 break;
8495
8496 case R_PPC_PLT16_HA:
8497 {
8498 unsigned int insn;
8499
8500 insn = bfd_get_32 (input_bfd,
8501 contents + rel->r_offset - d_offset);
8502 if ((insn & (0x3f << 26)) == 15u << 26
8503 && (insn & (0x1f << 16)) != 0)
8504 {
8505 if (!bfd_link_pic (info))
8506 {
8507 /* Convert addis to lis. */
8508 insn &= ~(0x1f << 16);
8509 bfd_put_32 (input_bfd, insn,
8510 contents + rel->r_offset - d_offset);
8511 }
8512 }
8513 else if (bfd_link_pic (info))
8514 info->callbacks->einfo
8515 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8516 input_bfd, input_section, rel->r_offset,
8517 "R_PPC_PLT16_HA", insn);
8518 }
8519 break;
8520 }
8521
8522 if (ELIMINATE_COPY_RELOCS
8523 && h != NULL
8524 && !h->def_regular
8525 && h->protected_def
8526 && ppc_elf_hash_entry (h)->has_addr16_ha
8527 && ppc_elf_hash_entry (h)->has_addr16_lo
8528 && htab->params->pic_fixup > 0)
8529 {
8530 /* Convert lis;addi or lis;load/store accessing a protected
8531 variable defined in a shared library to PIC. */
8532 unsigned int insn;
8533
8534 if (r_type == R_PPC_ADDR16_HA)
8535 {
8536 insn = bfd_get_32 (input_bfd,
8537 contents + rel->r_offset - d_offset);
8538 if ((insn & (0x3f << 26)) == (15u << 26)
8539 && (insn & (0x1f << 16)) == 0 /* lis */)
8540 {
8541 bfd_byte *p;
8542 bfd_vma off;
8543 bfd_vma got_addr;
8544
8545 p = (contents + input_section->size
8546 - relax_info->workaround_size
8547 - relax_info->picfixup_size
8548 + picfixup_size);
8549 off = (p - contents) - (rel->r_offset - d_offset);
8550 if (off > 0x1fffffc || (off & 3) != 0)
8551 info->callbacks->einfo
8552 (_("%H: fixup branch overflow\n"),
8553 input_bfd, input_section, rel->r_offset);
8554
8555 bfd_put_32 (input_bfd, B | off,
8556 contents + rel->r_offset - d_offset);
8557 got_addr = (htab->elf.sgot->output_section->vma
8558 + htab->elf.sgot->output_offset
8559 + (h->got.offset & ~1));
8560 wrel->r_offset = (p - contents) + d_offset;
8561 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8562 wrel->r_addend = got_addr;
8563 insn &= ~0xffff;
8564 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8565 bfd_put_32 (input_bfd, insn, p);
8566
8567 /* Convert lis to lwz, loading address from GOT. */
8568 insn &= ~0xffff;
8569 insn ^= (32u ^ 15u) << 26;
8570 insn |= (insn & (0x1f << 21)) >> 5;
8571 insn |= got_addr & 0xffff;
8572 bfd_put_32 (input_bfd, insn, p + 4);
8573
8574 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8575 picfixup_size += 12;
8576
8577 /* Use one of the spare relocs, so --emit-relocs
8578 output is reasonable. */
8579 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8580 wrel++, rel++;
8581 rel->r_offset = wrel[-1].r_offset + 4;
8582 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8583 rel->r_addend = wrel[-1].r_addend;
8584
8585 /* Continue on as if we had a got reloc, to output
8586 dynamic reloc. */
8587 r_type = R_PPC_GOT16_LO;
8588 }
8589 else
8590 _bfd_error_handler
8591 /* xgettext:c-format */
8592 (_("%pB(%pA+%#" PRIx64 "): error: "
8593 "%s with unexpected instruction %#x"),
8594 input_bfd, input_section, (uint64_t) rel->r_offset,
8595 "R_PPC_ADDR16_HA", insn);
8596 }
8597 else if (r_type == R_PPC_ADDR16_LO)
8598 {
8599 insn = bfd_get_32 (input_bfd,
8600 contents + rel->r_offset - d_offset);
8601 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8602 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8603 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8604 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8605 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8606 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8607 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8608 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8609 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8610 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8611 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8612 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8613 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8614 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8615 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8616 && (insn & 3) != 1)
8617 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8618 && ((insn & 3) == 0 || (insn & 3) == 3)))
8619 {
8620 /* Arrange to apply the reloc addend, if any. */
8621 relocation = 0;
8622 unresolved_reloc = FALSE;
8623 rel->r_info = ELF32_R_INFO (0, r_type);
8624 }
8625 else
8626 _bfd_error_handler
8627 /* xgettext:c-format */
8628 (_("%pB(%pA+%#" PRIx64 "): error: "
8629 "%s with unexpected instruction %#x"),
8630 input_bfd, input_section, (uint64_t) rel->r_offset,
8631 "R_PPC_ADDR16_LO", insn);
8632 }
8633 }
8634
8635 ifunc = NULL;
8636 if (!htab->is_vxworks)
8637 {
8638 struct plt_entry *ent;
8639
8640 if (h != NULL)
8641 {
8642 if (h->type == STT_GNU_IFUNC)
8643 ifunc = &h->plt.plist;
8644 }
8645 else if (local_got_offsets != NULL
8646 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8647 {
8648 struct plt_entry **local_plt;
8649
8650 local_plt = (struct plt_entry **) (local_got_offsets
8651 + symtab_hdr->sh_info);
8652 ifunc = local_plt + r_symndx;
8653 }
8654
8655 ent = NULL;
8656 if (ifunc != NULL
8657 && (!bfd_link_pic (info)
8658 || is_branch_reloc (r_type)
8659 || r_type == R_PPC_PLT16_LO
8660 || r_type == R_PPC_PLT16_HI
8661 || r_type == R_PPC_PLT16_HA))
8662 {
8663 addend = 0;
8664 if (bfd_link_pic (info)
8665 && (r_type == R_PPC_PLTREL24
8666 || r_type == R_PPC_PLT16_LO
8667 || r_type == R_PPC_PLT16_HI
8668 || r_type == R_PPC_PLT16_HA))
8669 addend = rel->r_addend;
8670 ent = find_plt_ent (ifunc, got2, addend);
8671 }
8672 if (ent != NULL)
8673 {
8674 if (bfd_link_pic (info)
8675 && ent->sec != got2
8676 && htab->plt_type != PLT_NEW
8677 && (!htab->elf.dynamic_sections_created
8678 || h == NULL
8679 || h->dynindx == -1))
8680 {
8681 /* Uh oh, we are going to create a pic glink stub
8682 for an ifunc (here for h == NULL and later in
8683 finish_dynamic_symbol for h != NULL), and
8684 apparently are using code compiled with
8685 -mbss-plt. The difficulty is that -mbss-plt code
8686 gives no indication via a magic PLTREL24 addend
8687 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8688 is pointing into a .got2 section (and how far
8689 into .got2). */
8690 info->callbacks->einfo
8691 /* xgettext:c-format */
8692 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8693 input_bfd, input_section, rel->r_offset, sym_name);
8694 }
8695
8696 unresolved_reloc = FALSE;
8697 if (htab->plt_type == PLT_NEW
8698 || !htab->elf.dynamic_sections_created
8699 || h == NULL
8700 || h->dynindx == -1)
8701 relocation = (htab->glink->output_section->vma
8702 + htab->glink->output_offset
8703 + (ent->glink_offset & ~1));
8704 else
8705 relocation = (htab->elf.splt->output_section->vma
8706 + htab->elf.splt->output_offset
8707 + ent->plt.offset);
8708 }
8709 }
8710
8711 addend = rel->r_addend;
8712 save_unresolved_reloc = unresolved_reloc;
8713 howto = NULL;
8714 if (r_type < R_PPC_max)
8715 howto = ppc_elf_howto_table[r_type];
8716
8717 switch (r_type)
8718 {
8719 default:
8720 break;
8721
8722 case R_PPC_TPREL16_HA:
8723 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8724 {
8725 bfd_byte *p = contents + (rel->r_offset & ~3);
8726 unsigned int insn = bfd_get_32 (input_bfd, p);
8727 if ((insn & ((0x3f << 26) | 0x1f << 16))
8728 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8729 /* xgettext:c-format */
8730 info->callbacks->minfo
8731 (_("%H: warning: %s unexpected insn %#x.\n"),
8732 input_bfd, input_section, rel->r_offset, howto->name, insn);
8733 else
8734 bfd_put_32 (input_bfd, NOP, p);
8735 }
8736 break;
8737
8738 case R_PPC_TPREL16_LO:
8739 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8740 {
8741 bfd_byte *p = contents + (rel->r_offset & ~3);
8742 unsigned int insn = bfd_get_32 (input_bfd, p);
8743 insn &= ~(0x1f << 16);
8744 insn |= 2 << 16;
8745 bfd_put_32 (input_bfd, insn, p);
8746 }
8747 break;
8748 }
8749
8750 tls_type = 0;
8751 switch (r_type)
8752 {
8753 default:
8754 /* xgettext:c-format */
8755 _bfd_error_handler (_("%pB: %s unsupported"),
8756 input_bfd, howto->name);
8757
8758 bfd_set_error (bfd_error_bad_value);
8759 ret = FALSE;
8760 goto copy_reloc;
8761
8762 case R_PPC_NONE:
8763 case R_PPC_TLS:
8764 case R_PPC_TLSGD:
8765 case R_PPC_TLSLD:
8766 case R_PPC_EMB_MRKREF:
8767 case R_PPC_GNU_VTINHERIT:
8768 case R_PPC_GNU_VTENTRY:
8769 goto copy_reloc;
8770
8771 /* GOT16 relocations. Like an ADDR16 using the symbol's
8772 address in the GOT as relocation value instead of the
8773 symbol's value itself. Also, create a GOT entry for the
8774 symbol and put the symbol value there. */
8775 case R_PPC_GOT_TLSGD16:
8776 case R_PPC_GOT_TLSGD16_LO:
8777 case R_PPC_GOT_TLSGD16_HI:
8778 case R_PPC_GOT_TLSGD16_HA:
8779 tls_type = TLS_TLS | TLS_GD;
8780 goto dogot;
8781
8782 case R_PPC_GOT_TLSLD16:
8783 case R_PPC_GOT_TLSLD16_LO:
8784 case R_PPC_GOT_TLSLD16_HI:
8785 case R_PPC_GOT_TLSLD16_HA:
8786 tls_type = TLS_TLS | TLS_LD;
8787 goto dogot;
8788
8789 case R_PPC_GOT_TPREL16:
8790 case R_PPC_GOT_TPREL16_LO:
8791 case R_PPC_GOT_TPREL16_HI:
8792 case R_PPC_GOT_TPREL16_HA:
8793 tls_type = TLS_TLS | TLS_TPREL;
8794 goto dogot;
8795
8796 case R_PPC_GOT_DTPREL16:
8797 case R_PPC_GOT_DTPREL16_LO:
8798 case R_PPC_GOT_DTPREL16_HI:
8799 case R_PPC_GOT_DTPREL16_HA:
8800 tls_type = TLS_TLS | TLS_DTPREL;
8801 goto dogot;
8802
8803 case R_PPC_GOT16:
8804 case R_PPC_GOT16_LO:
8805 case R_PPC_GOT16_HI:
8806 case R_PPC_GOT16_HA:
8807 tls_mask = 0;
8808 dogot:
8809 {
8810 /* Relocation is to the entry for this symbol in the global
8811 offset table. */
8812 bfd_vma off;
8813 bfd_vma *offp;
8814 unsigned long indx;
8815
8816 if (htab->elf.sgot == NULL)
8817 abort ();
8818
8819 indx = 0;
8820 if (tls_type == (TLS_TLS | TLS_LD)
8821 && (h == NULL
8822 || !h->def_dynamic))
8823 offp = &htab->tlsld_got.offset;
8824 else if (h != NULL)
8825 {
8826 if (!htab->elf.dynamic_sections_created
8827 || h->dynindx == -1
8828 || SYMBOL_REFERENCES_LOCAL (info, h)
8829 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8830 /* This is actually a static link, or it is a
8831 -Bsymbolic link and the symbol is defined
8832 locally, or the symbol was forced to be local
8833 because of a version file. */
8834 ;
8835 else
8836 {
8837 indx = h->dynindx;
8838 unresolved_reloc = FALSE;
8839 }
8840 offp = &h->got.offset;
8841 }
8842 else
8843 {
8844 if (local_got_offsets == NULL)
8845 abort ();
8846 offp = &local_got_offsets[r_symndx];
8847 }
8848
8849 /* The offset must always be a multiple of 4. We use the
8850 least significant bit to record whether we have already
8851 processed this entry. */
8852 off = *offp;
8853 if ((off & 1) != 0)
8854 off &= ~1;
8855 else
8856 {
8857 unsigned int tls_m = ((tls_mask & TLS_TLS) != 0
8858 ? tls_mask & (TLS_LD | TLS_GD | TLS_DTPREL
8859 | TLS_TPREL | TLS_TPRELGD)
8860 : 0);
8861
8862 if (offp == &htab->tlsld_got.offset)
8863 tls_m = TLS_LD;
8864 else if (h == NULL
8865 || !h->def_dynamic)
8866 tls_m &= ~TLS_LD;
8867
8868 /* We might have multiple got entries for this sym.
8869 Initialize them all. */
8870 do
8871 {
8872 int tls_ty = 0;
8873
8874 if ((tls_m & TLS_LD) != 0)
8875 {
8876 tls_ty = TLS_TLS | TLS_LD;
8877 tls_m &= ~TLS_LD;
8878 }
8879 else if ((tls_m & TLS_GD) != 0)
8880 {
8881 tls_ty = TLS_TLS | TLS_GD;
8882 tls_m &= ~TLS_GD;
8883 }
8884 else if ((tls_m & TLS_DTPREL) != 0)
8885 {
8886 tls_ty = TLS_TLS | TLS_DTPREL;
8887 tls_m &= ~TLS_DTPREL;
8888 }
8889 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8890 {
8891 tls_ty = TLS_TLS | TLS_TPREL;
8892 tls_m = 0;
8893 }
8894
8895 /* Generate relocs for the dynamic linker. */
8896 if (indx != 0
8897 || (bfd_link_pic (info)
8898 && (h == NULL
8899 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8900 || offp == &htab->tlsld_got.offset)
8901 && !(tls_ty == (TLS_TLS | TLS_TPREL)
8902 && bfd_link_executable (info)
8903 && SYMBOL_REFERENCES_LOCAL (info, h))))
8904 {
8905 asection *rsec = htab->elf.srelgot;
8906 bfd_byte * loc;
8907
8908 if (ifunc != NULL)
8909 {
8910 rsec = htab->elf.irelplt;
8911 if (indx == 0)
8912 htab->local_ifunc_resolver = 1;
8913 else if (is_static_defined (h))
8914 htab->maybe_local_ifunc_resolver = 1;
8915 }
8916 outrel.r_offset = (htab->elf.sgot->output_section->vma
8917 + htab->elf.sgot->output_offset
8918 + off);
8919 outrel.r_addend = 0;
8920 if (tls_ty & (TLS_LD | TLS_GD))
8921 {
8922 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8923 if (tls_ty == (TLS_TLS | TLS_GD))
8924 {
8925 loc = rsec->contents;
8926 loc += (rsec->reloc_count++
8927 * sizeof (Elf32_External_Rela));
8928 bfd_elf32_swap_reloca_out (output_bfd,
8929 &outrel, loc);
8930 outrel.r_offset += 4;
8931 outrel.r_info
8932 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8933 }
8934 }
8935 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8936 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8937 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8938 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8939 else if (indx != 0)
8940 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8941 else if (ifunc != NULL)
8942 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8943 else
8944 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8945 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8946 {
8947 outrel.r_addend += relocation;
8948 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8949 {
8950 if (htab->elf.tls_sec == NULL)
8951 outrel.r_addend = 0;
8952 else
8953 outrel.r_addend -= htab->elf.tls_sec->vma;
8954 }
8955 }
8956 loc = rsec->contents;
8957 loc += (rsec->reloc_count++
8958 * sizeof (Elf32_External_Rela));
8959 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8960 }
8961
8962 /* Init the .got section contents if we're not
8963 emitting a reloc. */
8964 else
8965 {
8966 bfd_vma value = relocation;
8967
8968 if (tls_ty != 0)
8969 {
8970 if (htab->elf.tls_sec == NULL)
8971 value = 0;
8972 else
8973 {
8974 if (tls_ty & TLS_LD)
8975 value = 0;
8976 else
8977 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8978 if (tls_ty & TLS_TPREL)
8979 value += DTP_OFFSET - TP_OFFSET;
8980 }
8981
8982 if (tls_ty & (TLS_LD | TLS_GD))
8983 {
8984 bfd_put_32 (input_bfd, value,
8985 htab->elf.sgot->contents + off + 4);
8986 value = 1;
8987 }
8988 }
8989 bfd_put_32 (input_bfd, value,
8990 htab->elf.sgot->contents + off);
8991 }
8992
8993 off += 4;
8994 if (tls_ty & (TLS_LD | TLS_GD))
8995 off += 4;
8996 }
8997 while (tls_m != 0);
8998
8999 off = *offp;
9000 *offp = off | 1;
9001 }
9002
9003 if (off >= (bfd_vma) -2)
9004 abort ();
9005
9006 if ((tls_type & TLS_TLS) != 0)
9007 {
9008 if (tls_type != (TLS_TLS | TLS_LD))
9009 {
9010 if ((tls_mask & TLS_LD) != 0
9011 && !(h == NULL
9012 || !h->def_dynamic))
9013 off += 8;
9014 if (tls_type != (TLS_TLS | TLS_GD))
9015 {
9016 if ((tls_mask & TLS_GD) != 0)
9017 off += 8;
9018 if (tls_type != (TLS_TLS | TLS_DTPREL))
9019 {
9020 if ((tls_mask & TLS_DTPREL) != 0)
9021 off += 4;
9022 }
9023 }
9024 }
9025 }
9026
9027 /* If here for a picfixup, we're done. */
9028 if (r_type != ELF32_R_TYPE (rel->r_info))
9029 goto copy_reloc;
9030
9031 relocation = (htab->elf.sgot->output_section->vma
9032 + htab->elf.sgot->output_offset
9033 + off
9034 - SYM_VAL (htab->elf.hgot));
9035
9036 /* Addends on got relocations don't make much sense.
9037 x+off@got is actually x@got+off, and since the got is
9038 generated by a hash table traversal, the value in the
9039 got at entry m+n bears little relation to the entry m. */
9040 if (addend != 0)
9041 info->callbacks->einfo
9042 /* xgettext:c-format */
9043 (_("%H: non-zero addend on %s reloc against `%s'\n"),
9044 input_bfd, input_section, rel->r_offset,
9045 howto->name,
9046 sym_name);
9047 }
9048 break;
9049
9050 /* Relocations that need no special processing. */
9051 case R_PPC_LOCAL24PC:
9052 /* It makes no sense to point a local relocation
9053 at a symbol not in this object. */
9054 if (unresolved_reloc)
9055 {
9056 (*info->callbacks->undefined_symbol) (info,
9057 h->root.root.string,
9058 input_bfd,
9059 input_section,
9060 rel->r_offset,
9061 TRUE);
9062 goto copy_reloc;
9063 }
9064 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
9065 {
9066 /* @local on an ifunc does not really make sense since
9067 the ifunc resolver can take you anywhere. More
9068 seriously, calls to ifuncs must go through a plt call
9069 stub, and for pic the plt call stubs uses r30 to
9070 access the PLT. The problem is that a call that is
9071 local won't have the +32k reloc addend trick marking
9072 -fPIC code, so the linker won't know whether r30 is
9073 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
9074 /* xgettext:c-format */
9075 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
9076 input_bfd, input_section, rel->r_offset,
9077 h->root.root.string);
9078 }
9079 break;
9080
9081 case R_PPC_DTPREL16:
9082 case R_PPC_DTPREL16_LO:
9083 case R_PPC_DTPREL16_HI:
9084 case R_PPC_DTPREL16_HA:
9085 if (htab->elf.tls_sec != NULL)
9086 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9087 break;
9088
9089 /* Relocations that may need to be propagated if this is a shared
9090 object. */
9091 case R_PPC_TPREL16:
9092 case R_PPC_TPREL16_LO:
9093 case R_PPC_TPREL16_HI:
9094 case R_PPC_TPREL16_HA:
9095 if (h != NULL
9096 && h->root.type == bfd_link_hash_undefweak
9097 && h->dynindx == -1)
9098 {
9099 /* Make this relocation against an undefined weak symbol
9100 resolve to zero. This is really just a tweak, since
9101 code using weak externs ought to check that they are
9102 defined before using them. */
9103 bfd_byte *p = contents + rel->r_offset - d_offset;
9104 unsigned int insn = bfd_get_32 (input_bfd, p);
9105 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
9106 if (insn != 0)
9107 bfd_put_32 (input_bfd, insn, p);
9108 break;
9109 }
9110 if (htab->elf.tls_sec != NULL)
9111 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9112 /* The TPREL16 relocs shouldn't really be used in shared
9113 libs or with non-local symbols as that will result in
9114 DT_TEXTREL being set, but support them anyway. */
9115 goto dodyn;
9116
9117 case R_PPC_TPREL32:
9118 if (htab->elf.tls_sec != NULL)
9119 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9120 goto dodyn;
9121
9122 case R_PPC_DTPREL32:
9123 if (htab->elf.tls_sec != NULL)
9124 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9125 goto dodyn;
9126
9127 case R_PPC_DTPMOD32:
9128 relocation = 1;
9129 addend = 0;
9130 goto dodyn;
9131
9132 case R_PPC_REL16:
9133 case R_PPC_REL16_LO:
9134 case R_PPC_REL16_HI:
9135 case R_PPC_REL16_HA:
9136 case R_PPC_REL16DX_HA:
9137 break;
9138
9139 case R_PPC_REL32:
9140 if (h == NULL || h == htab->elf.hgot)
9141 break;
9142 /* fall through */
9143
9144 case R_PPC_ADDR32:
9145 case R_PPC_ADDR16:
9146 case R_PPC_ADDR16_LO:
9147 case R_PPC_ADDR16_HI:
9148 case R_PPC_ADDR16_HA:
9149 case R_PPC_UADDR32:
9150 case R_PPC_UADDR16:
9151 goto dodyn;
9152
9153 case R_PPC_VLE_REL8:
9154 case R_PPC_VLE_REL15:
9155 case R_PPC_VLE_REL24:
9156 case R_PPC_REL24:
9157 case R_PPC_REL14:
9158 case R_PPC_REL14_BRTAKEN:
9159 case R_PPC_REL14_BRNTAKEN:
9160 /* If these relocations are not to a named symbol, they can be
9161 handled right here, no need to bother the dynamic linker. */
9162 if (SYMBOL_CALLS_LOCAL (info, h)
9163 || h == htab->elf.hgot)
9164 break;
9165 /* fall through */
9166
9167 case R_PPC_ADDR24:
9168 case R_PPC_ADDR14:
9169 case R_PPC_ADDR14_BRTAKEN:
9170 case R_PPC_ADDR14_BRNTAKEN:
9171 if (h != NULL && !bfd_link_pic (info))
9172 break;
9173 /* fall through */
9174
9175 dodyn:
9176 if ((input_section->flags & SEC_ALLOC) == 0
9177 || is_vxworks_tls)
9178 break;
9179
9180 if (bfd_link_pic (info)
9181 ? ((h == NULL
9182 || ppc_elf_hash_entry (h)->dyn_relocs != NULL)
9183 && ((h != NULL && pc_dynrelocs (h))
9184 || must_be_dyn_reloc (info, r_type)))
9185 : (h != NULL
9186 && ppc_elf_hash_entry (h)->dyn_relocs != NULL))
9187 {
9188 int skip;
9189 bfd_byte *loc;
9190 asection *sreloc;
9191 long indx = 0;
9192
9193 #ifdef DEBUG
9194 fprintf (stderr, "ppc_elf_relocate_section needs to "
9195 "create relocation for %s\n",
9196 (h && h->root.root.string
9197 ? h->root.root.string : "<unknown>"));
9198 #endif
9199
9200 /* When generating a shared object, these relocations
9201 are copied into the output file to be resolved at run
9202 time. */
9203 skip = 0;
9204 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
9205 input_section,
9206 rel->r_offset);
9207 if (outrel.r_offset == (bfd_vma) -1
9208 || outrel.r_offset == (bfd_vma) -2)
9209 skip = (int) outrel.r_offset;
9210 outrel.r_offset += (input_section->output_section->vma
9211 + input_section->output_offset);
9212
9213 if (skip)
9214 memset (&outrel, 0, sizeof outrel);
9215 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
9216 {
9217 indx = h->dynindx;
9218 BFD_ASSERT (indx != -1);
9219 unresolved_reloc = FALSE;
9220 outrel.r_info = ELF32_R_INFO (indx, r_type);
9221 outrel.r_addend = rel->r_addend;
9222 }
9223 else
9224 {
9225 outrel.r_addend = relocation + rel->r_addend;
9226
9227 if (r_type != R_PPC_ADDR32)
9228 {
9229 if (ifunc != NULL)
9230 {
9231 /* If we get here when building a static
9232 executable, then the libc startup function
9233 responsible for applying indirect function
9234 relocations is going to complain about
9235 the reloc type.
9236 If we get here when building a dynamic
9237 executable, it will be because we have
9238 a text relocation. The dynamic loader
9239 will set the text segment writable and
9240 non-executable to apply text relocations.
9241 So we'll segfault when trying to run the
9242 indirection function to resolve the reloc. */
9243 info->callbacks->einfo
9244 /* xgettext:c-format */
9245 (_("%H: relocation %s for indirect "
9246 "function %s unsupported\n"),
9247 input_bfd, input_section, rel->r_offset,
9248 howto->name,
9249 sym_name);
9250 ret = FALSE;
9251 }
9252 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
9253 ;
9254 else if (sec == NULL || sec->owner == NULL)
9255 {
9256 bfd_set_error (bfd_error_bad_value);
9257 ret = FALSE;
9258 }
9259 else
9260 {
9261 asection *osec;
9262
9263 /* We are turning this relocation into one
9264 against a section symbol. It would be
9265 proper to subtract the symbol's value,
9266 osec->vma, from the emitted reloc addend,
9267 but ld.so expects buggy relocs.
9268 FIXME: Why not always use a zero index? */
9269 osec = sec->output_section;
9270 indx = elf_section_data (osec)->dynindx;
9271 if (indx == 0)
9272 {
9273 osec = htab->elf.text_index_section;
9274 indx = elf_section_data (osec)->dynindx;
9275 }
9276 BFD_ASSERT (indx != 0);
9277 #ifdef DEBUG
9278 if (indx == 0)
9279 printf ("indx=%ld section=%s flags=%08x name=%s\n",
9280 indx, osec->name, osec->flags,
9281 h->root.root.string);
9282 #endif
9283 }
9284
9285 outrel.r_info = ELF32_R_INFO (indx, r_type);
9286 }
9287 else if (ifunc != NULL)
9288 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9289 else
9290 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9291 }
9292
9293 sreloc = elf_section_data (input_section)->sreloc;
9294 if (ifunc)
9295 {
9296 sreloc = htab->elf.irelplt;
9297 if (indx == 0)
9298 htab->local_ifunc_resolver = 1;
9299 else if (is_static_defined (h))
9300 htab->maybe_local_ifunc_resolver = 1;
9301 }
9302 if (sreloc == NULL)
9303 return FALSE;
9304
9305 loc = sreloc->contents;
9306 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
9307 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9308
9309 if (skip == -1)
9310 goto copy_reloc;
9311
9312 /* This reloc will be computed at runtime. Clear the memory
9313 so that it contains a predictable value for prelink. */
9314 if (!skip)
9315 {
9316 relocation = howto->pc_relative ? outrel.r_offset : 0;
9317 addend = 0;
9318 break;
9319 }
9320 }
9321 break;
9322
9323 case R_PPC_RELAX_PLT:
9324 case R_PPC_RELAX_PLTREL24:
9325 if (h != NULL)
9326 {
9327 struct plt_entry *ent;
9328 bfd_vma got2_addend = 0;
9329
9330 if (r_type == R_PPC_RELAX_PLTREL24)
9331 {
9332 if (bfd_link_pic (info))
9333 got2_addend = addend;
9334 addend = 0;
9335 }
9336 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9337 if (htab->plt_type == PLT_NEW)
9338 relocation = (htab->glink->output_section->vma
9339 + htab->glink->output_offset
9340 + ent->glink_offset);
9341 else
9342 relocation = (htab->elf.splt->output_section->vma
9343 + htab->elf.splt->output_offset
9344 + ent->plt.offset);
9345 }
9346 /* Fall through. */
9347
9348 case R_PPC_RELAX:
9349 {
9350 const int *stub;
9351 size_t size;
9352 size_t insn_offset = rel->r_offset;
9353 unsigned int insn;
9354
9355 if (bfd_link_pic (info))
9356 {
9357 relocation -= (input_section->output_section->vma
9358 + input_section->output_offset
9359 + rel->r_offset - 4);
9360 stub = shared_stub_entry;
9361 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9362 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9363 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9364 stub += 3;
9365 size = ARRAY_SIZE (shared_stub_entry) - 3;
9366 }
9367 else
9368 {
9369 stub = stub_entry;
9370 size = ARRAY_SIZE (stub_entry);
9371 }
9372
9373 relocation += addend;
9374 if (bfd_link_relocatable (info))
9375 relocation = 0;
9376
9377 /* First insn is HA, second is LO. */
9378 insn = *stub++;
9379 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9380 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9381 insn_offset += 4;
9382
9383 insn = *stub++;
9384 insn |= relocation & 0xffff;
9385 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9386 insn_offset += 4;
9387 size -= 2;
9388
9389 while (size != 0)
9390 {
9391 insn = *stub++;
9392 --size;
9393 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9394 insn_offset += 4;
9395 }
9396
9397 /* Rewrite the reloc and convert one of the trailing nop
9398 relocs to describe this relocation. */
9399 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9400 /* The relocs are at the bottom 2 bytes */
9401 wrel->r_offset = rel->r_offset + d_offset;
9402 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9403 wrel->r_addend = rel->r_addend;
9404 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9405 wrel++, rel++;
9406 wrel->r_offset += 4;
9407 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9408 }
9409 continue;
9410
9411 /* Indirect .sdata relocation. */
9412 case R_PPC_EMB_SDAI16:
9413 BFD_ASSERT (htab->sdata[0].section != NULL);
9414 if (!is_static_defined (htab->sdata[0].sym))
9415 {
9416 unresolved_reloc = TRUE;
9417 break;
9418 }
9419 relocation
9420 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9421 h, relocation, rel);
9422 addend = 0;
9423 break;
9424
9425 /* Indirect .sdata2 relocation. */
9426 case R_PPC_EMB_SDA2I16:
9427 BFD_ASSERT (htab->sdata[1].section != NULL);
9428 if (!is_static_defined (htab->sdata[1].sym))
9429 {
9430 unresolved_reloc = TRUE;
9431 break;
9432 }
9433 relocation
9434 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9435 h, relocation, rel);
9436 addend = 0;
9437 break;
9438
9439 /* Handle the TOC16 reloc. We want to use the offset within the .got
9440 section, not the actual VMA. This is appropriate when generating
9441 an embedded ELF object, for which the .got section acts like the
9442 AIX .toc section. */
9443 case R_PPC_TOC16: /* phony GOT16 relocations */
9444 if (sec == NULL || sec->output_section == NULL)
9445 {
9446 unresolved_reloc = TRUE;
9447 break;
9448 }
9449 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9450 ".got") == 0
9451 || strcmp (bfd_get_section_name (sec->owner, sec),
9452 ".cgot") == 0);
9453
9454 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9455 break;
9456
9457 case R_PPC_PLTREL24:
9458 if (h != NULL && ifunc == NULL)
9459 {
9460 struct plt_entry *ent;
9461
9462 ent = find_plt_ent (&h->plt.plist, got2,
9463 bfd_link_pic (info) ? addend : 0);
9464 if (ent == NULL
9465 || htab->elf.splt == NULL)
9466 {
9467 /* We didn't make a PLT entry for this symbol. This
9468 happens when statically linking PIC code, or when
9469 using -Bsymbolic. */
9470 }
9471 else
9472 {
9473 /* Relocation is to the entry for this symbol in the
9474 procedure linkage table. */
9475 unresolved_reloc = FALSE;
9476 if (htab->plt_type == PLT_NEW)
9477 relocation = (htab->glink->output_section->vma
9478 + htab->glink->output_offset
9479 + ent->glink_offset);
9480 else
9481 relocation = (htab->elf.splt->output_section->vma
9482 + htab->elf.splt->output_offset
9483 + ent->plt.offset);
9484 }
9485 }
9486
9487 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9488 addend specifies the GOT pointer offset within .got2.
9489 Don't apply it to the relocation field. */
9490 addend = 0;
9491 break;
9492
9493 case R_PPC_PLTSEQ:
9494 case R_PPC_PLTCALL:
9495 case R_PPC_PLT16_LO:
9496 case R_PPC_PLT16_HI:
9497 case R_PPC_PLT16_HA:
9498 plt_list = NULL;
9499 if (h != NULL)
9500 plt_list = &h->plt.plist;
9501 else if (ifunc != NULL)
9502 plt_list = ifunc;
9503 else if (local_got_offsets != NULL)
9504 {
9505 struct plt_entry **local_plt;
9506 local_plt = (struct plt_entry **) (local_got_offsets
9507 + symtab_hdr->sh_info);
9508 plt_list = local_plt + r_symndx;
9509 }
9510 unresolved_reloc = TRUE;
9511 if (plt_list != NULL)
9512 {
9513 struct plt_entry *ent;
9514
9515 ent = find_plt_ent (plt_list, got2,
9516 bfd_link_pic (info) ? addend : 0);
9517 if (ent != NULL && ent->plt.offset != (bfd_vma) -1)
9518 {
9519 asection *plt;
9520
9521 unresolved_reloc = FALSE;
9522 plt = htab->elf.splt;
9523 if (!htab->elf.dynamic_sections_created
9524 || h == NULL
9525 || h->dynindx == -1)
9526 {
9527 if (ifunc != NULL)
9528 plt = htab->elf.iplt;
9529 else
9530 plt = htab->pltlocal;
9531 }
9532 relocation = (plt->output_section->vma
9533 + plt->output_offset
9534 + ent->plt.offset);
9535 if (bfd_link_pic (info))
9536 {
9537 bfd_vma got = 0;
9538
9539 if (ent->addend >= 32768)
9540 got = (ent->addend
9541 + ent->sec->output_section->vma
9542 + ent->sec->output_offset);
9543 else
9544 got = SYM_VAL (htab->elf.hgot);
9545 relocation -= got;
9546 }
9547 }
9548 }
9549 addend = 0;
9550 break;
9551
9552 /* Relocate against _SDA_BASE_. */
9553 case R_PPC_SDAREL16:
9554 {
9555 const char *name;
9556 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9557
9558 if (sec == NULL
9559 || sec->output_section == NULL
9560 || !is_static_defined (sda))
9561 {
9562 unresolved_reloc = TRUE;
9563 break;
9564 }
9565 addend -= SYM_VAL (sda);
9566
9567 name = bfd_get_section_name (output_bfd, sec->output_section);
9568 if (!(strcmp (name, ".sdata") == 0
9569 || strcmp (name, ".sbss") == 0))
9570 {
9571 _bfd_error_handler
9572 /* xgettext:c-format */
9573 (_("%pB: the target (%s) of a %s relocation is "
9574 "in the wrong output section (%s)"),
9575 input_bfd,
9576 sym_name,
9577 howto->name,
9578 name);
9579 }
9580 }
9581 break;
9582
9583 /* Relocate against _SDA2_BASE_. */
9584 case R_PPC_EMB_SDA2REL:
9585 {
9586 const char *name;
9587 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9588
9589 if (sec == NULL
9590 || sec->output_section == NULL
9591 || !is_static_defined (sda))
9592 {
9593 unresolved_reloc = TRUE;
9594 break;
9595 }
9596 addend -= SYM_VAL (sda);
9597
9598 name = bfd_get_section_name (output_bfd, sec->output_section);
9599 if (!(strcmp (name, ".sdata2") == 0
9600 || strcmp (name, ".sbss2") == 0))
9601 {
9602 _bfd_error_handler
9603 /* xgettext:c-format */
9604 (_("%pB: the target (%s) of a %s relocation is "
9605 "in the wrong output section (%s)"),
9606 input_bfd,
9607 sym_name,
9608 howto->name,
9609 name);
9610 }
9611 }
9612 break;
9613
9614 case R_PPC_VLE_LO16A:
9615 relocation = relocation + addend;
9616 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9617 contents + rel->r_offset, relocation,
9618 split16a_type, htab->params->vle_reloc_fixup);
9619 goto copy_reloc;
9620
9621 case R_PPC_VLE_LO16D:
9622 relocation = relocation + addend;
9623 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9624 contents + rel->r_offset, relocation,
9625 split16d_type, htab->params->vle_reloc_fixup);
9626 goto copy_reloc;
9627
9628 case R_PPC_VLE_HI16A:
9629 relocation = (relocation + addend) >> 16;
9630 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9631 contents + rel->r_offset, relocation,
9632 split16a_type, htab->params->vle_reloc_fixup);
9633 goto copy_reloc;
9634
9635 case R_PPC_VLE_HI16D:
9636 relocation = (relocation + addend) >> 16;
9637 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9638 contents + rel->r_offset, relocation,
9639 split16d_type, htab->params->vle_reloc_fixup);
9640 goto copy_reloc;
9641
9642 case R_PPC_VLE_HA16A:
9643 relocation = (relocation + addend + 0x8000) >> 16;
9644 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9645 contents + rel->r_offset, relocation,
9646 split16a_type, htab->params->vle_reloc_fixup);
9647 goto copy_reloc;
9648
9649 case R_PPC_VLE_HA16D:
9650 relocation = (relocation + addend + 0x8000) >> 16;
9651 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9652 contents + rel->r_offset, relocation,
9653 split16d_type, htab->params->vle_reloc_fixup);
9654 goto copy_reloc;
9655
9656 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9657 case R_PPC_EMB_SDA21:
9658 case R_PPC_VLE_SDA21:
9659 case R_PPC_EMB_RELSDA:
9660 case R_PPC_VLE_SDA21_LO:
9661 {
9662 const char *name;
9663 int reg;
9664 unsigned int insn;
9665 struct elf_link_hash_entry *sda = NULL;
9666
9667 if (sec == NULL || sec->output_section == NULL)
9668 {
9669 unresolved_reloc = TRUE;
9670 break;
9671 }
9672
9673 name = bfd_get_section_name (output_bfd, sec->output_section);
9674 if (strcmp (name, ".sdata") == 0
9675 || strcmp (name, ".sbss") == 0)
9676 {
9677 reg = 13;
9678 sda = htab->sdata[0].sym;
9679 }
9680 else if (strcmp (name, ".sdata2") == 0
9681 || strcmp (name, ".sbss2") == 0)
9682 {
9683 reg = 2;
9684 sda = htab->sdata[1].sym;
9685 }
9686 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9687 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9688 {
9689 reg = 0;
9690 }
9691 else
9692 {
9693 _bfd_error_handler
9694 /* xgettext:c-format */
9695 (_("%pB: the target (%s) of a %s relocation is "
9696 "in the wrong output section (%s)"),
9697 input_bfd,
9698 sym_name,
9699 howto->name,
9700 name);
9701
9702 bfd_set_error (bfd_error_bad_value);
9703 ret = FALSE;
9704 goto copy_reloc;
9705 }
9706
9707 if (sda != NULL)
9708 {
9709 if (!is_static_defined (sda))
9710 {
9711 unresolved_reloc = TRUE;
9712 break;
9713 }
9714 addend -= SYM_VAL (sda);
9715 }
9716
9717 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9718 if (reg == 0
9719 && (r_type == R_PPC_VLE_SDA21
9720 || r_type == R_PPC_VLE_SDA21_LO))
9721 {
9722 relocation = relocation + addend;
9723 addend = 0;
9724
9725 /* Force e_li insn, keeping RT from original insn. */
9726 insn &= 0x1f << 21;
9727 insn |= 28u << 26;
9728
9729 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9730 /* Top 4 bits of value to 17..20. */
9731 insn |= (relocation & 0xf0000) >> 5;
9732 /* Next 5 bits of the value to 11..15. */
9733 insn |= (relocation & 0xf800) << 5;
9734 /* And the final 11 bits of the value to bits 21 to 31. */
9735 insn |= relocation & 0x7ff;
9736
9737 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9738
9739 if (r_type == R_PPC_VLE_SDA21
9740 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9741 goto overflow;
9742 goto copy_reloc;
9743 }
9744 else if (r_type == R_PPC_EMB_SDA21
9745 || r_type == R_PPC_VLE_SDA21
9746 || r_type == R_PPC_VLE_SDA21_LO)
9747 {
9748 /* Fill in register field. */
9749 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9750 }
9751 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9752 }
9753 break;
9754
9755 case R_PPC_VLE_SDAREL_LO16A:
9756 case R_PPC_VLE_SDAREL_LO16D:
9757 case R_PPC_VLE_SDAREL_HI16A:
9758 case R_PPC_VLE_SDAREL_HI16D:
9759 case R_PPC_VLE_SDAREL_HA16A:
9760 case R_PPC_VLE_SDAREL_HA16D:
9761 {
9762 bfd_vma value;
9763 const char *name;
9764 struct elf_link_hash_entry *sda = NULL;
9765
9766 if (sec == NULL || sec->output_section == NULL)
9767 {
9768 unresolved_reloc = TRUE;
9769 break;
9770 }
9771
9772 name = bfd_get_section_name (output_bfd, sec->output_section);
9773 if (strcmp (name, ".sdata") == 0
9774 || strcmp (name, ".sbss") == 0)
9775 sda = htab->sdata[0].sym;
9776 else if (strcmp (name, ".sdata2") == 0
9777 || strcmp (name, ".sbss2") == 0)
9778 sda = htab->sdata[1].sym;
9779 else
9780 {
9781 _bfd_error_handler
9782 /* xgettext:c-format */
9783 (_("%pB: the target (%s) of a %s relocation is "
9784 "in the wrong output section (%s)"),
9785 input_bfd,
9786 sym_name,
9787 howto->name,
9788 name);
9789
9790 bfd_set_error (bfd_error_bad_value);
9791 ret = FALSE;
9792 goto copy_reloc;
9793 }
9794
9795 if (sda == NULL || !is_static_defined (sda))
9796 {
9797 unresolved_reloc = TRUE;
9798 break;
9799 }
9800 value = relocation + addend - SYM_VAL (sda);
9801
9802 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9803 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9804 contents + rel->r_offset, value,
9805 split16a_type,
9806 htab->params->vle_reloc_fixup);
9807 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9808 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9809 contents + rel->r_offset, value,
9810 split16d_type,
9811 htab->params->vle_reloc_fixup);
9812 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9813 {
9814 value = value >> 16;
9815 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9816 contents + rel->r_offset, value,
9817 split16a_type,
9818 htab->params->vle_reloc_fixup);
9819 }
9820 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9821 {
9822 value = value >> 16;
9823 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9824 contents + rel->r_offset, value,
9825 split16d_type,
9826 htab->params->vle_reloc_fixup);
9827 }
9828 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9829 {
9830 value = (value + 0x8000) >> 16;
9831 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9832 contents + rel->r_offset, value,
9833 split16a_type,
9834 htab->params->vle_reloc_fixup);
9835 }
9836 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9837 {
9838 value = (value + 0x8000) >> 16;
9839 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9840 contents + rel->r_offset, value,
9841 split16d_type,
9842 htab->params->vle_reloc_fixup);
9843 }
9844 }
9845 goto copy_reloc;
9846
9847 case R_PPC_VLE_ADDR20:
9848 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9849 continue;
9850
9851 /* Relocate against the beginning of the section. */
9852 case R_PPC_SECTOFF:
9853 case R_PPC_SECTOFF_LO:
9854 case R_PPC_SECTOFF_HI:
9855 case R_PPC_SECTOFF_HA:
9856 if (sec == NULL || sec->output_section == NULL)
9857 {
9858 unresolved_reloc = TRUE;
9859 break;
9860 }
9861 addend -= sec->output_section->vma;
9862 break;
9863
9864 /* Negative relocations. */
9865 case R_PPC_EMB_NADDR32:
9866 case R_PPC_EMB_NADDR16:
9867 case R_PPC_EMB_NADDR16_LO:
9868 case R_PPC_EMB_NADDR16_HI:
9869 case R_PPC_EMB_NADDR16_HA:
9870 addend -= 2 * relocation;
9871 break;
9872
9873 case R_PPC_COPY:
9874 case R_PPC_GLOB_DAT:
9875 case R_PPC_JMP_SLOT:
9876 case R_PPC_RELATIVE:
9877 case R_PPC_IRELATIVE:
9878 case R_PPC_PLT32:
9879 case R_PPC_PLTREL32:
9880 case R_PPC_ADDR30:
9881 case R_PPC_EMB_RELSEC16:
9882 case R_PPC_EMB_RELST_LO:
9883 case R_PPC_EMB_RELST_HI:
9884 case R_PPC_EMB_RELST_HA:
9885 case R_PPC_EMB_BIT_FLD:
9886 /* xgettext:c-format */
9887 _bfd_error_handler (_("%pB: %s unsupported"),
9888 input_bfd, howto->name);
9889
9890 bfd_set_error (bfd_error_invalid_operation);
9891 ret = FALSE;
9892 goto copy_reloc;
9893 }
9894
9895 switch (r_type)
9896 {
9897 default:
9898 break;
9899
9900 case R_PPC_PLTCALL:
9901 if (unresolved_reloc)
9902 {
9903 bfd_byte *p = contents + rel->r_offset;
9904 unsigned int insn = bfd_get_32 (input_bfd, p);
9905 insn &= 1;
9906 bfd_put_32 (input_bfd, B | insn, p);
9907 unresolved_reloc = save_unresolved_reloc;
9908 r_type = R_PPC_REL24;
9909 howto = ppc_elf_howto_table[r_type];
9910 }
9911 else if (htab->plt_type != PLT_NEW)
9912 info->callbacks->einfo
9913 (_("%P: %H: %s relocation unsupported for bss-plt\n"),
9914 input_bfd, input_section, rel->r_offset,
9915 howto->name);
9916 break;
9917
9918 case R_PPC_PLTSEQ:
9919 case R_PPC_PLT16_HA:
9920 case R_PPC_PLT16_LO:
9921 if (unresolved_reloc)
9922 {
9923 bfd_byte *p = contents + (rel->r_offset & ~3);
9924 bfd_put_32 (input_bfd, NOP, p);
9925 unresolved_reloc = FALSE;
9926 r_type = R_PPC_NONE;
9927 howto = ppc_elf_howto_table[r_type];
9928 }
9929 else if (htab->plt_type != PLT_NEW)
9930 info->callbacks->einfo
9931 (_("%P: %H: %s relocation unsupported for bss-plt\n"),
9932 input_bfd, input_section, rel->r_offset,
9933 howto->name);
9934 break;
9935 }
9936
9937 /* Do any further special processing. */
9938 switch (r_type)
9939 {
9940 default:
9941 break;
9942
9943 case R_PPC_ADDR16_HA:
9944 case R_PPC_REL16_HA:
9945 case R_PPC_REL16DX_HA:
9946 case R_PPC_SECTOFF_HA:
9947 case R_PPC_TPREL16_HA:
9948 case R_PPC_DTPREL16_HA:
9949 case R_PPC_EMB_NADDR16_HA:
9950 case R_PPC_EMB_RELST_HA:
9951 /* It's just possible that this symbol is a weak symbol
9952 that's not actually defined anywhere. In that case,
9953 'sec' would be NULL, and we should leave the symbol
9954 alone (it will be set to zero elsewhere in the link). */
9955 if (sec == NULL)
9956 break;
9957 /* Fall through. */
9958
9959 case R_PPC_PLT16_HA:
9960 case R_PPC_GOT16_HA:
9961 case R_PPC_GOT_TLSGD16_HA:
9962 case R_PPC_GOT_TLSLD16_HA:
9963 case R_PPC_GOT_TPREL16_HA:
9964 case R_PPC_GOT_DTPREL16_HA:
9965 /* Add 0x10000 if sign bit in 0:15 is set.
9966 Bits 0:15 are not used. */
9967 addend += 0x8000;
9968 break;
9969
9970 case R_PPC_ADDR16:
9971 case R_PPC_ADDR16_LO:
9972 case R_PPC_GOT16:
9973 case R_PPC_GOT16_LO:
9974 case R_PPC_SDAREL16:
9975 case R_PPC_SECTOFF:
9976 case R_PPC_SECTOFF_LO:
9977 case R_PPC_DTPREL16:
9978 case R_PPC_DTPREL16_LO:
9979 case R_PPC_TPREL16:
9980 case R_PPC_TPREL16_LO:
9981 case R_PPC_GOT_TLSGD16:
9982 case R_PPC_GOT_TLSGD16_LO:
9983 case R_PPC_GOT_TLSLD16:
9984 case R_PPC_GOT_TLSLD16_LO:
9985 case R_PPC_GOT_DTPREL16:
9986 case R_PPC_GOT_DTPREL16_LO:
9987 case R_PPC_GOT_TPREL16:
9988 case R_PPC_GOT_TPREL16_LO:
9989 {
9990 /* The 32-bit ABI lacks proper relocations to deal with
9991 certain 64-bit instructions. Prevent damage to bits
9992 that make up part of the insn opcode. */
9993 unsigned int insn, mask, lobit;
9994
9995 insn = bfd_get_32 (input_bfd,
9996 contents + rel->r_offset - d_offset);
9997 mask = 0;
9998 if (is_insn_ds_form (insn))
9999 mask = 3;
10000 else if (is_insn_dq_form (insn))
10001 mask = 15;
10002 else
10003 break;
10004 relocation += addend;
10005 addend = insn & mask;
10006 lobit = mask & relocation;
10007 if (lobit != 0)
10008 {
10009 relocation ^= lobit;
10010 info->callbacks->einfo
10011 /* xgettext:c-format */
10012 (_("%H: error: %s against `%s' not a multiple of %u\n"),
10013 input_bfd, input_section, rel->r_offset,
10014 howto->name, sym_name, mask + 1);
10015 bfd_set_error (bfd_error_bad_value);
10016 ret = FALSE;
10017 }
10018 }
10019 break;
10020 }
10021
10022 #ifdef DEBUG
10023 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
10024 "offset = %ld, addend = %ld\n",
10025 howto->name,
10026 (int) r_type,
10027 sym_name,
10028 r_symndx,
10029 (long) rel->r_offset,
10030 (long) addend);
10031 #endif
10032
10033 if (unresolved_reloc
10034 && !((input_section->flags & SEC_DEBUGGING) != 0
10035 && h->def_dynamic)
10036 && _bfd_elf_section_offset (output_bfd, info, input_section,
10037 rel->r_offset) != (bfd_vma) -1)
10038 {
10039 info->callbacks->einfo
10040 /* xgettext:c-format */
10041 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
10042 input_bfd, input_section, rel->r_offset,
10043 howto->name,
10044 sym_name);
10045 ret = FALSE;
10046 }
10047
10048 /* 16-bit fields in insns mostly have signed values, but a
10049 few insns have 16-bit unsigned values. Really, we should
10050 have different reloc types. */
10051 if (howto->complain_on_overflow != complain_overflow_dont
10052 && howto->dst_mask == 0xffff
10053 && (input_section->flags & SEC_CODE) != 0)
10054 {
10055 enum complain_overflow complain = complain_overflow_signed;
10056
10057 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
10058 {
10059 unsigned int insn;
10060
10061 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10062 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
10063 complain = complain_overflow_bitfield;
10064 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
10065 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
10066 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
10067 complain = complain_overflow_unsigned;
10068 }
10069 if (howto->complain_on_overflow != complain)
10070 {
10071 alt_howto = *howto;
10072 alt_howto.complain_on_overflow = complain;
10073 howto = &alt_howto;
10074 }
10075 }
10076
10077 if (r_type == R_PPC_REL16DX_HA)
10078 {
10079 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
10080 if (rel->r_offset + 4 > input_section->size)
10081 r = bfd_reloc_outofrange;
10082 else
10083 {
10084 unsigned int insn;
10085
10086 relocation += addend;
10087 relocation -= (rel->r_offset
10088 + input_section->output_offset
10089 + input_section->output_section->vma);
10090 relocation >>= 16;
10091 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
10092 insn &= ~0x1fffc1;
10093 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
10094 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
10095 r = bfd_reloc_ok;
10096 }
10097 }
10098 else
10099 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
10100 rel->r_offset, relocation, addend);
10101
10102 if (r != bfd_reloc_ok)
10103 {
10104 if (r == bfd_reloc_overflow)
10105 {
10106 overflow:
10107 /* On code like "if (foo) foo();" don't report overflow
10108 on a branch to zero when foo is undefined. */
10109 if (!warned
10110 && !(h != NULL
10111 && (h->root.type == bfd_link_hash_undefweak
10112 || h->root.type == bfd_link_hash_undefined)
10113 && is_branch_reloc (r_type)))
10114 info->callbacks->reloc_overflow
10115 (info, (h ? &h->root : NULL), sym_name, howto->name,
10116 rel->r_addend, input_bfd, input_section, rel->r_offset);
10117 }
10118 else
10119 {
10120 info->callbacks->einfo
10121 /* xgettext:c-format */
10122 (_("%H: %s reloc against `%s': error %d\n"),
10123 input_bfd, input_section, rel->r_offset,
10124 howto->name, sym_name, (int) r);
10125 ret = FALSE;
10126 }
10127 }
10128 copy_reloc:
10129 if (wrel != rel)
10130 *wrel = *rel;
10131 }
10132
10133 if (wrel != rel)
10134 {
10135 Elf_Internal_Shdr *rel_hdr;
10136 size_t deleted = rel - wrel;
10137
10138 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
10139 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
10140 if (rel_hdr->sh_size == 0)
10141 {
10142 /* It is too late to remove an empty reloc section. Leave
10143 one NONE reloc.
10144 ??? What is wrong with an empty section??? */
10145 rel_hdr->sh_size = rel_hdr->sh_entsize;
10146 deleted -= 1;
10147 wrel++;
10148 }
10149 relend = wrel;
10150 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
10151 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
10152 input_section->reloc_count -= deleted;
10153 }
10154
10155 #ifdef DEBUG
10156 fprintf (stderr, "\n");
10157 #endif
10158
10159 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
10160 && input_section->size != input_section->rawsize
10161 && (strcmp (input_section->output_section->name, ".init") == 0
10162 || strcmp (input_section->output_section->name, ".fini") == 0))
10163 {
10164 /* Branch around the trampolines. */
10165 unsigned int insn = B + input_section->size - input_section->rawsize;
10166 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
10167 }
10168
10169 if (htab->params->ppc476_workaround
10170 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
10171 && (!bfd_link_relocatable (info)
10172 || (input_section->output_section->alignment_power
10173 >= htab->params->pagesize_p2)))
10174 {
10175 bfd_vma start_addr, end_addr, addr;
10176 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10177
10178 if (relax_info->workaround_size != 0)
10179 {
10180 bfd_byte *p;
10181 unsigned int n;
10182 bfd_byte fill[4];
10183
10184 bfd_put_32 (input_bfd, BA, fill);
10185 p = contents + input_section->size - relax_info->workaround_size;
10186 n = relax_info->workaround_size >> 2;
10187 while (n--)
10188 {
10189 memcpy (p, fill, 4);
10190 p += 4;
10191 }
10192 }
10193
10194 /* The idea is: Replace the last instruction on a page with a
10195 branch to a patch area. Put the insn there followed by a
10196 branch back to the next page. Complicated a little by
10197 needing to handle moved conditional branches, and by not
10198 wanting to touch data-in-text. */
10199
10200 start_addr = (input_section->output_section->vma
10201 + input_section->output_offset);
10202 end_addr = (start_addr + input_section->size
10203 - relax_info->workaround_size);
10204 for (addr = ((start_addr & -pagesize) + pagesize - 4);
10205 addr < end_addr;
10206 addr += pagesize)
10207 {
10208 bfd_vma offset = addr - start_addr;
10209 Elf_Internal_Rela *lo, *hi;
10210 bfd_boolean is_data;
10211 bfd_vma patch_off, patch_addr;
10212 unsigned int insn;
10213
10214 /* Do we have a data reloc at this offset? If so, leave
10215 the word alone. */
10216 is_data = FALSE;
10217 lo = relocs;
10218 hi = relend;
10219 rel = NULL;
10220 while (lo < hi)
10221 {
10222 rel = lo + (hi - lo) / 2;
10223 if (rel->r_offset < offset)
10224 lo = rel + 1;
10225 else if (rel->r_offset > offset + 3)
10226 hi = rel;
10227 else
10228 {
10229 switch (ELF32_R_TYPE (rel->r_info))
10230 {
10231 case R_PPC_ADDR32:
10232 case R_PPC_UADDR32:
10233 case R_PPC_REL32:
10234 case R_PPC_ADDR30:
10235 is_data = TRUE;
10236 break;
10237 default:
10238 break;
10239 }
10240 break;
10241 }
10242 }
10243 if (is_data)
10244 continue;
10245
10246 /* Some instructions can be left alone too. Unconditional
10247 branches, except for bcctr with BO=0x14 (bctr, bctrl),
10248 avoid the icache failure.
10249
10250 The problem occurs due to prefetch across a page boundary
10251 where stale instructions can be fetched from the next
10252 page, and the mechanism for flushing these bad
10253 instructions fails under certain circumstances. The
10254 unconditional branches:
10255 1) Branch: b, bl, ba, bla,
10256 2) Branch Conditional: bc, bca, bcl, bcla,
10257 3) Branch Conditional to Link Register: bclr, bclrl,
10258 where (2) and (3) have BO=0x14 making them unconditional,
10259 prevent the bad prefetch because the prefetch itself is
10260 affected by these instructions. This happens even if the
10261 instruction is not executed.
10262
10263 A bctr example:
10264 .
10265 . lis 9,new_page@ha
10266 . addi 9,9,new_page@l
10267 . mtctr 9
10268 . bctr
10269 . nop
10270 . nop
10271 . new_page:
10272 .
10273 The bctr is not predicted taken due to ctr not being
10274 ready, so prefetch continues on past the bctr into the
10275 new page which might have stale instructions. If they
10276 fail to be flushed, then they will be executed after the
10277 bctr executes. Either of the following modifications
10278 prevent the bad prefetch from happening in the first
10279 place:
10280 .
10281 . lis 9,new_page@ha lis 9,new_page@ha
10282 . addi 9,9,new_page@l addi 9,9,new_page@l
10283 . mtctr 9 mtctr 9
10284 . bctr bctr
10285 . nop b somewhere_else
10286 . b somewhere_else nop
10287 . new_page: new_page:
10288 . */
10289 insn = bfd_get_32 (input_bfd, contents + offset);
10290 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
10291 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
10292 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
10293 || ((insn & (0x3f << 26)) == (19u << 26)
10294 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
10295 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
10296 continue;
10297
10298 patch_addr = (start_addr + input_section->size
10299 - relax_info->workaround_size);
10300 patch_addr = (patch_addr + 15) & -16;
10301 patch_off = patch_addr - start_addr;
10302 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
10303
10304 if (rel != NULL
10305 && rel->r_offset >= offset
10306 && rel->r_offset < offset + 4)
10307 {
10308 asection *sreloc;
10309
10310 /* If the insn we are patching had a reloc, adjust the
10311 reloc r_offset so that the reloc applies to the moved
10312 location. This matters for -r and --emit-relocs. */
10313 if (rel + 1 != relend)
10314 {
10315 Elf_Internal_Rela tmp = *rel;
10316
10317 /* Keep the relocs sorted by r_offset. */
10318 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
10319 relend[-1] = tmp;
10320 }
10321 relend[-1].r_offset += patch_off - offset;
10322
10323 /* Adjust REL16 addends too. */
10324 switch (ELF32_R_TYPE (relend[-1].r_info))
10325 {
10326 case R_PPC_REL16:
10327 case R_PPC_REL16_LO:
10328 case R_PPC_REL16_HI:
10329 case R_PPC_REL16_HA:
10330 relend[-1].r_addend += patch_off - offset;
10331 break;
10332 default:
10333 break;
10334 }
10335
10336 /* If we are building a PIE or shared library with
10337 non-PIC objects, perhaps we had a dynamic reloc too?
10338 If so, the dynamic reloc must move with the insn. */
10339 sreloc = elf_section_data (input_section)->sreloc;
10340 if (sreloc != NULL)
10341 {
10342 Elf32_External_Rela *slo, *shi, *srelend;
10343 bfd_vma soffset;
10344
10345 slo = (Elf32_External_Rela *) sreloc->contents;
10346 shi = srelend = slo + sreloc->reloc_count;
10347 soffset = (offset + input_section->output_section->vma
10348 + input_section->output_offset);
10349 while (slo < shi)
10350 {
10351 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
10352 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
10353 &outrel);
10354 if (outrel.r_offset < soffset)
10355 slo = srel + 1;
10356 else if (outrel.r_offset > soffset + 3)
10357 shi = srel;
10358 else
10359 {
10360 if (srel + 1 != srelend)
10361 {
10362 memmove (srel, srel + 1,
10363 (srelend - (srel + 1)) * sizeof (*srel));
10364 srel = srelend - 1;
10365 }
10366 outrel.r_offset += patch_off - offset;
10367 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
10368 (bfd_byte *) srel);
10369 break;
10370 }
10371 }
10372 }
10373 }
10374 else
10375 rel = NULL;
10376
10377 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
10378 && (insn & 2) == 0 /* relative */)
10379 {
10380 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
10381
10382 delta += offset - patch_off;
10383 if (bfd_link_relocatable (info) && rel != NULL)
10384 delta = 0;
10385 if (!bfd_link_relocatable (info) && rel != NULL)
10386 {
10387 enum elf_ppc_reloc_type r_type;
10388
10389 r_type = ELF32_R_TYPE (relend[-1].r_info);
10390 if (r_type == R_PPC_REL14_BRTAKEN)
10391 insn |= BRANCH_PREDICT_BIT;
10392 else if (r_type == R_PPC_REL14_BRNTAKEN)
10393 insn &= ~BRANCH_PREDICT_BIT;
10394 else
10395 BFD_ASSERT (r_type == R_PPC_REL14);
10396
10397 if ((r_type == R_PPC_REL14_BRTAKEN
10398 || r_type == R_PPC_REL14_BRNTAKEN)
10399 && delta + 0x8000 < 0x10000
10400 && (bfd_signed_vma) delta < 0)
10401 insn ^= BRANCH_PREDICT_BIT;
10402 }
10403 if (delta + 0x8000 < 0x10000)
10404 {
10405 bfd_put_32 (input_bfd,
10406 (insn & ~0xfffc) | (delta & 0xfffc),
10407 contents + patch_off);
10408 patch_off += 4;
10409 bfd_put_32 (input_bfd,
10410 B | ((offset + 4 - patch_off) & 0x3fffffc),
10411 contents + patch_off);
10412 patch_off += 4;
10413 }
10414 else
10415 {
10416 if (rel != NULL)
10417 {
10418 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10419
10420 relend[-1].r_offset += 8;
10421 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10422 }
10423 bfd_put_32 (input_bfd,
10424 (insn & ~0xfffc) | 8,
10425 contents + patch_off);
10426 patch_off += 4;
10427 bfd_put_32 (input_bfd,
10428 B | ((offset + 4 - patch_off) & 0x3fffffc),
10429 contents + patch_off);
10430 patch_off += 4;
10431 bfd_put_32 (input_bfd,
10432 B | ((delta - 8) & 0x3fffffc),
10433 contents + patch_off);
10434 patch_off += 4;
10435 }
10436 }
10437 else
10438 {
10439 bfd_put_32 (input_bfd, insn, contents + patch_off);
10440 patch_off += 4;
10441 bfd_put_32 (input_bfd,
10442 B | ((offset + 4 - patch_off) & 0x3fffffc),
10443 contents + patch_off);
10444 patch_off += 4;
10445 }
10446 BFD_ASSERT (patch_off <= input_section->size);
10447 relax_info->workaround_size = input_section->size - patch_off;
10448 }
10449 }
10450
10451 return ret;
10452 }
10453 \f
10454 /* Write out the PLT relocs and entries for H. */
10455
10456 static bfd_boolean
10457 write_global_sym_plt (struct elf_link_hash_entry *h, void *inf)
10458 {
10459 struct bfd_link_info *info = (struct bfd_link_info *) inf;
10460 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10461 struct plt_entry *ent;
10462 bfd_boolean doneone;
10463
10464 doneone = FALSE;
10465 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10466 if (ent->plt.offset != (bfd_vma) -1)
10467 {
10468 if (!doneone)
10469 {
10470 Elf_Internal_Rela rela;
10471 bfd_byte *loc;
10472 bfd_vma reloc_index;
10473 asection *plt = htab->elf.splt;
10474 asection *relplt = htab->elf.srelplt;
10475
10476 if (htab->plt_type == PLT_NEW
10477 || !htab->elf.dynamic_sections_created
10478 || h->dynindx == -1)
10479 reloc_index = ent->plt.offset / 4;
10480 else
10481 {
10482 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10483 / htab->plt_slot_size);
10484 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10485 && htab->plt_type == PLT_OLD)
10486 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10487 }
10488
10489 /* This symbol has an entry in the procedure linkage table.
10490 Set it up. */
10491 if (htab->plt_type == PLT_VXWORKS
10492 && htab->elf.dynamic_sections_created
10493 && h->dynindx != -1)
10494 {
10495 bfd_vma got_offset;
10496 const bfd_vma *plt_entry;
10497
10498 /* The first three entries in .got.plt are reserved. */
10499 got_offset = (reloc_index + 3) * 4;
10500
10501 /* Use the right PLT. */
10502 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10503 : ppc_elf_vxworks_plt_entry;
10504
10505 /* Fill in the .plt on VxWorks. */
10506 if (bfd_link_pic (info))
10507 {
10508 bfd_put_32 (info->output_bfd,
10509 plt_entry[0] | PPC_HA (got_offset),
10510 plt->contents + ent->plt.offset + 0);
10511 bfd_put_32 (info->output_bfd,
10512 plt_entry[1] | PPC_LO (got_offset),
10513 plt->contents + ent->plt.offset + 4);
10514 }
10515 else
10516 {
10517 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10518
10519 bfd_put_32 (info->output_bfd,
10520 plt_entry[0] | PPC_HA (got_loc),
10521 plt->contents + ent->plt.offset + 0);
10522 bfd_put_32 (info->output_bfd,
10523 plt_entry[1] | PPC_LO (got_loc),
10524 plt->contents + ent->plt.offset + 4);
10525 }
10526
10527 bfd_put_32 (info->output_bfd, plt_entry[2],
10528 plt->contents + ent->plt.offset + 8);
10529 bfd_put_32 (info->output_bfd, plt_entry[3],
10530 plt->contents + ent->plt.offset + 12);
10531
10532 /* This instruction is an immediate load. The value loaded is
10533 the byte offset of the R_PPC_JMP_SLOT relocation from the
10534 start of the .rela.plt section. The value is stored in the
10535 low-order 16 bits of the load instruction. */
10536 /* NOTE: It appears that this is now an index rather than a
10537 prescaled offset. */
10538 bfd_put_32 (info->output_bfd,
10539 plt_entry[4] | reloc_index,
10540 plt->contents + ent->plt.offset + 16);
10541 /* This instruction is a PC-relative branch whose target is
10542 the start of the PLT section. The address of this branch
10543 instruction is 20 bytes beyond the start of this PLT entry.
10544 The address is encoded in bits 6-29, inclusive. The value
10545 stored is right-shifted by two bits, permitting a 26-bit
10546 offset. */
10547 bfd_put_32 (info->output_bfd,
10548 (plt_entry[5]
10549 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10550 plt->contents + ent->plt.offset + 20);
10551 bfd_put_32 (info->output_bfd, plt_entry[6],
10552 plt->contents + ent->plt.offset + 24);
10553 bfd_put_32 (info->output_bfd, plt_entry[7],
10554 plt->contents + ent->plt.offset + 28);
10555
10556 /* Fill in the GOT entry corresponding to this PLT slot with
10557 the address immediately after the "bctr" instruction
10558 in this PLT entry. */
10559 bfd_put_32 (info->output_bfd, (plt->output_section->vma
10560 + plt->output_offset
10561 + ent->plt.offset + 16),
10562 htab->elf.sgotplt->contents + got_offset);
10563
10564 if (!bfd_link_pic (info))
10565 {
10566 /* Fill in a couple of entries in .rela.plt.unloaded. */
10567 loc = htab->srelplt2->contents
10568 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10569 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10570 * sizeof (Elf32_External_Rela));
10571
10572 /* Provide the @ha relocation for the first instruction. */
10573 rela.r_offset = (plt->output_section->vma
10574 + plt->output_offset
10575 + ent->plt.offset + 2);
10576 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10577 R_PPC_ADDR16_HA);
10578 rela.r_addend = got_offset;
10579 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10580 loc += sizeof (Elf32_External_Rela);
10581
10582 /* Provide the @l relocation for the second instruction. */
10583 rela.r_offset = (plt->output_section->vma
10584 + plt->output_offset
10585 + ent->plt.offset + 6);
10586 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10587 R_PPC_ADDR16_LO);
10588 rela.r_addend = got_offset;
10589 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10590 loc += sizeof (Elf32_External_Rela);
10591
10592 /* Provide a relocation for the GOT entry corresponding to this
10593 PLT slot. Point it at the middle of the .plt entry. */
10594 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10595 + htab->elf.sgotplt->output_offset
10596 + got_offset);
10597 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10598 R_PPC_ADDR32);
10599 rela.r_addend = ent->plt.offset + 16;
10600 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10601 }
10602
10603 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10604 In particular, the offset for the relocation is not the
10605 address of the PLT entry for this function, as specified
10606 by the ABI. Instead, the offset is set to the address of
10607 the GOT slot for this function. See EABI 4.4.4.1. */
10608 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10609 + htab->elf.sgotplt->output_offset
10610 + got_offset);
10611 rela.r_addend = 0;
10612 }
10613 else
10614 {
10615 rela.r_addend = 0;
10616 if (!htab->elf.dynamic_sections_created
10617 || h->dynindx == -1)
10618 {
10619 if (h->type == STT_GNU_IFUNC)
10620 {
10621 plt = htab->elf.iplt;
10622 relplt = htab->elf.irelplt;
10623 }
10624 else
10625 {
10626 plt = htab->pltlocal;
10627 relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL;
10628 }
10629 if (h->def_regular
10630 && (h->root.type == bfd_link_hash_defined
10631 || h->root.type == bfd_link_hash_defweak))
10632 rela.r_addend = SYM_VAL (h);
10633 }
10634
10635 if (relplt == NULL)
10636 {
10637 loc = plt->contents + ent->plt.offset;
10638 bfd_put_32 (info->output_bfd, rela.r_addend, loc);
10639 }
10640 else
10641 {
10642 rela.r_offset = (plt->output_section->vma
10643 + plt->output_offset
10644 + ent->plt.offset);
10645
10646 if (htab->plt_type == PLT_OLD
10647 || !htab->elf.dynamic_sections_created
10648 || h->dynindx == -1)
10649 {
10650 /* We don't need to fill in the .plt. The ppc dynamic
10651 linker will fill it in. */
10652 }
10653 else
10654 {
10655 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10656 + htab->glink->output_section->vma
10657 + htab->glink->output_offset);
10658 bfd_put_32 (info->output_bfd, val,
10659 plt->contents + ent->plt.offset);
10660 }
10661 }
10662 }
10663
10664 if (relplt != NULL)
10665 {
10666 /* Fill in the entry in the .rela.plt section. */
10667 if (!htab->elf.dynamic_sections_created
10668 || h->dynindx == -1)
10669 {
10670 if (h->type == STT_GNU_IFUNC)
10671 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10672 else
10673 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
10674 loc = relplt->contents + (relplt->reloc_count++
10675 * sizeof (Elf32_External_Rela));
10676 htab->local_ifunc_resolver = 1;
10677 }
10678 else
10679 {
10680 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10681 loc = relplt->contents + (reloc_index
10682 * sizeof (Elf32_External_Rela));
10683 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10684 htab->maybe_local_ifunc_resolver = 1;
10685 }
10686 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10687 }
10688 doneone = TRUE;
10689 }
10690
10691 if (htab->plt_type == PLT_NEW
10692 || !htab->elf.dynamic_sections_created
10693 || h->dynindx == -1)
10694 {
10695 unsigned char *p;
10696 asection *plt = htab->elf.splt;
10697
10698 if (!htab->elf.dynamic_sections_created
10699 || h->dynindx == -1)
10700 {
10701 if (h->type == STT_GNU_IFUNC)
10702 plt = htab->elf.iplt;
10703 else
10704 break;
10705 }
10706
10707 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10708 write_glink_stub (h, ent, plt, p, info);
10709
10710 if (!bfd_link_pic (info))
10711 /* We only need one non-PIC glink stub. */
10712 break;
10713 }
10714 else
10715 break;
10716 }
10717 return TRUE;
10718 }
10719
10720 /* Finish up PLT handling. */
10721
10722 bfd_boolean
10723 ppc_finish_symbols (struct bfd_link_info *info)
10724 {
10725 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10726 bfd *ibfd;
10727
10728 if (!htab)
10729 return TRUE;
10730
10731 elf_link_hash_traverse (&htab->elf, write_global_sym_plt, info);
10732
10733 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10734 {
10735 bfd_vma *local_got, *end_local_got;
10736 struct plt_entry **local_plt, **lplt, **end_local_plt;
10737 Elf_Internal_Shdr *symtab_hdr;
10738 bfd_size_type locsymcount;
10739 Elf_Internal_Sym *local_syms = NULL;
10740 struct plt_entry *ent;
10741
10742 if (!is_ppc_elf (ibfd))
10743 continue;
10744
10745 local_got = elf_local_got_offsets (ibfd);
10746 if (!local_got)
10747 continue;
10748
10749 symtab_hdr = &elf_symtab_hdr (ibfd);
10750 locsymcount = symtab_hdr->sh_info;
10751 end_local_got = local_got + locsymcount;
10752 local_plt = (struct plt_entry **) end_local_got;
10753 end_local_plt = local_plt + locsymcount;
10754 for (lplt = local_plt; lplt < end_local_plt; ++lplt)
10755 for (ent = *lplt; ent != NULL; ent = ent->next)
10756 {
10757 if (ent->plt.offset != (bfd_vma) -1)
10758 {
10759 Elf_Internal_Sym *sym;
10760 asection *sym_sec;
10761 asection *plt, *relplt;
10762 bfd_byte *loc;
10763 bfd_vma val;
10764 Elf_Internal_Rela rela;
10765
10766 if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms,
10767 lplt - local_plt, ibfd))
10768 {
10769 if (local_syms != NULL
10770 && symtab_hdr->contents != (unsigned char *) local_syms)
10771 free (local_syms);
10772 return FALSE;
10773 }
10774
10775 val = sym->st_value;
10776 if (sym_sec != NULL && sym_sec->output_section != NULL)
10777 val += sym_sec->output_offset + sym_sec->output_section->vma;
10778
10779 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
10780 {
10781 htab->local_ifunc_resolver = 1;
10782 plt = htab->elf.iplt;
10783 relplt = htab->elf.irelplt;
10784 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10785 }
10786 else
10787 {
10788 plt = htab->pltlocal;
10789 if (bfd_link_pic (info))
10790 {
10791 relplt = htab->relpltlocal;
10792 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
10793 }
10794 else
10795 {
10796 loc = plt->contents + ent->plt.offset;
10797 bfd_put_32 (info->output_bfd, val, loc);
10798 continue;
10799 }
10800 }
10801
10802 rela.r_offset = (ent->plt.offset
10803 + plt->output_offset
10804 + plt->output_section->vma);
10805 rela.r_addend = val;
10806 loc = relplt->contents + (relplt->reloc_count++
10807 * sizeof (Elf32_External_Rela));
10808 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10809 }
10810 if ((ent->glink_offset & 1) == 0)
10811 {
10812 unsigned char *p = ((unsigned char *) htab->glink->contents
10813 + ent->glink_offset);
10814
10815 write_glink_stub (NULL, ent, htab->elf.iplt, p, info);
10816 ent->glink_offset |= 1;
10817 }
10818 }
10819
10820 if (local_syms != NULL
10821 && symtab_hdr->contents != (unsigned char *) local_syms)
10822 {
10823 if (!info->keep_memory)
10824 free (local_syms);
10825 else
10826 symtab_hdr->contents = (unsigned char *) local_syms;
10827 }
10828 }
10829 return TRUE;
10830 }
10831
10832 /* Finish up dynamic symbol handling. We set the contents of various
10833 dynamic sections here. */
10834
10835 static bfd_boolean
10836 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10837 struct bfd_link_info *info,
10838 struct elf_link_hash_entry *h,
10839 Elf_Internal_Sym *sym)
10840 {
10841 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10842 struct plt_entry *ent;
10843
10844 #ifdef DEBUG
10845 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10846 h->root.root.string);
10847 #endif
10848
10849 if (!h->def_regular
10850 || (h->type == STT_GNU_IFUNC && !bfd_link_pic (info)))
10851 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10852 if (ent->plt.offset != (bfd_vma) -1)
10853 {
10854 if (!h->def_regular)
10855 {
10856 /* Mark the symbol as undefined, rather than as
10857 defined in the .plt section. Leave the value if
10858 there were any relocations where pointer equality
10859 matters (this is a clue for the dynamic linker, to
10860 make function pointer comparisons work between an
10861 application and shared library), otherwise set it
10862 to zero. */
10863 sym->st_shndx = SHN_UNDEF;
10864 if (!h->pointer_equality_needed)
10865 sym->st_value = 0;
10866 else if (!h->ref_regular_nonweak)
10867 {
10868 /* This breaks function pointer comparisons, but
10869 that is better than breaking tests for a NULL
10870 function pointer. */
10871 sym->st_value = 0;
10872 }
10873 }
10874 else
10875 {
10876 /* Set the value of ifunc symbols in a non-pie
10877 executable to the glink entry. This is to avoid
10878 text relocations. We can't do this for ifunc in
10879 allocate_dynrelocs, as we do for normal dynamic
10880 function symbols with plt entries, because we need
10881 to keep the original value around for the ifunc
10882 relocation. */
10883 sym->st_shndx
10884 = (_bfd_elf_section_from_bfd_section
10885 (info->output_bfd, htab->glink->output_section));
10886 sym->st_value = (ent->glink_offset
10887 + htab->glink->output_offset
10888 + htab->glink->output_section->vma);
10889 }
10890 break;
10891 }
10892
10893 if (h->needs_copy)
10894 {
10895 asection *s;
10896 Elf_Internal_Rela rela;
10897 bfd_byte *loc;
10898
10899 /* This symbols needs a copy reloc. Set it up. */
10900
10901 #ifdef DEBUG
10902 fprintf (stderr, ", copy");
10903 #endif
10904
10905 BFD_ASSERT (h->dynindx != -1);
10906
10907 if (ppc_elf_hash_entry (h)->has_sda_refs)
10908 s = htab->relsbss;
10909 else if (h->root.u.def.section == htab->elf.sdynrelro)
10910 s = htab->elf.sreldynrelro;
10911 else
10912 s = htab->elf.srelbss;
10913 BFD_ASSERT (s != NULL);
10914
10915 rela.r_offset = SYM_VAL (h);
10916 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10917 rela.r_addend = 0;
10918 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10919 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10920 }
10921
10922 #ifdef DEBUG
10923 fprintf (stderr, "\n");
10924 #endif
10925
10926 return TRUE;
10927 }
10928 \f
10929 static enum elf_reloc_type_class
10930 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10931 const asection *rel_sec,
10932 const Elf_Internal_Rela *rela)
10933 {
10934 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10935
10936 if (rel_sec == htab->elf.irelplt)
10937 return reloc_class_ifunc;
10938
10939 switch (ELF32_R_TYPE (rela->r_info))
10940 {
10941 case R_PPC_RELATIVE:
10942 return reloc_class_relative;
10943 case R_PPC_JMP_SLOT:
10944 return reloc_class_plt;
10945 case R_PPC_COPY:
10946 return reloc_class_copy;
10947 default:
10948 return reloc_class_normal;
10949 }
10950 }
10951 \f
10952 /* Finish up the dynamic sections. */
10953
10954 static bfd_boolean
10955 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10956 struct bfd_link_info *info)
10957 {
10958 asection *sdyn;
10959 struct ppc_elf_link_hash_table *htab;
10960 bfd_vma got;
10961 bfd *dynobj;
10962 bfd_boolean ret = TRUE;
10963
10964 #ifdef DEBUG
10965 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10966 #endif
10967
10968 htab = ppc_elf_hash_table (info);
10969 dynobj = htab->elf.dynobj;
10970 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10971
10972 got = 0;
10973 if (htab->elf.hgot != NULL)
10974 got = SYM_VAL (htab->elf.hgot);
10975
10976 if (htab->elf.dynamic_sections_created)
10977 {
10978 Elf32_External_Dyn *dyncon, *dynconend;
10979
10980 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10981
10982 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10983 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10984 for (; dyncon < dynconend; dyncon++)
10985 {
10986 Elf_Internal_Dyn dyn;
10987 asection *s;
10988
10989 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10990
10991 switch (dyn.d_tag)
10992 {
10993 case DT_PLTGOT:
10994 if (htab->is_vxworks)
10995 s = htab->elf.sgotplt;
10996 else
10997 s = htab->elf.splt;
10998 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10999 break;
11000
11001 case DT_PLTRELSZ:
11002 dyn.d_un.d_val = htab->elf.srelplt->size;
11003 break;
11004
11005 case DT_JMPREL:
11006 s = htab->elf.srelplt;
11007 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11008 break;
11009
11010 case DT_PPC_GOT:
11011 dyn.d_un.d_ptr = got;
11012 break;
11013
11014 case DT_TEXTREL:
11015 if (htab->local_ifunc_resolver)
11016 info->callbacks->einfo
11017 (_("%X%P: text relocations and GNU indirect "
11018 "functions will result in a segfault at runtime\n"));
11019 else if (htab->maybe_local_ifunc_resolver)
11020 info->callbacks->einfo
11021 (_("%P: warning: text relocations and GNU indirect "
11022 "functions may result in a segfault at runtime\n"));
11023 continue;
11024
11025 default:
11026 if (htab->is_vxworks
11027 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
11028 break;
11029 continue;
11030 }
11031
11032 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
11033 }
11034 }
11035
11036 if (htab->elf.sgot != NULL
11037 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
11038 {
11039 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
11040 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
11041 {
11042 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
11043
11044 p += htab->elf.hgot->root.u.def.value;
11045 if (htab->plt_type == PLT_OLD)
11046 {
11047 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
11048 so that a function can easily find the address of
11049 _GLOBAL_OFFSET_TABLE_. */
11050 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
11051 < htab->elf.hgot->root.u.def.section->size);
11052 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
11053 }
11054
11055 if (sdyn != NULL)
11056 {
11057 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
11058 BFD_ASSERT (htab->elf.hgot->root.u.def.value
11059 < htab->elf.hgot->root.u.def.section->size);
11060 bfd_put_32 (output_bfd, val, p);
11061 }
11062 }
11063 else
11064 {
11065 /* xgettext:c-format */
11066 _bfd_error_handler (_("%s not defined in linker created %pA"),
11067 htab->elf.hgot->root.root.string,
11068 (htab->elf.sgotplt != NULL
11069 ? htab->elf.sgotplt : htab->elf.sgot));
11070 bfd_set_error (bfd_error_bad_value);
11071 ret = FALSE;
11072 }
11073
11074 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
11075 }
11076
11077 /* Fill in the first entry in the VxWorks procedure linkage table. */
11078 if (htab->is_vxworks
11079 && htab->elf.splt != NULL
11080 && htab->elf.splt->size != 0
11081 && htab->elf.splt->output_section != bfd_abs_section_ptr)
11082 {
11083 asection *splt = htab->elf.splt;
11084 /* Use the right PLT. */
11085 const bfd_vma *plt_entry = (bfd_link_pic (info)
11086 ? ppc_elf_vxworks_pic_plt0_entry
11087 : ppc_elf_vxworks_plt0_entry);
11088
11089 if (!bfd_link_pic (info))
11090 {
11091 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
11092
11093 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
11094 splt->contents + 0);
11095 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
11096 splt->contents + 4);
11097 }
11098 else
11099 {
11100 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
11101 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
11102 }
11103 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
11104 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
11105 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
11106 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
11107 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
11108 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
11109
11110 if (! bfd_link_pic (info))
11111 {
11112 Elf_Internal_Rela rela;
11113 bfd_byte *loc;
11114
11115 loc = htab->srelplt2->contents;
11116
11117 /* Output the @ha relocation for the first instruction. */
11118 rela.r_offset = (htab->elf.splt->output_section->vma
11119 + htab->elf.splt->output_offset
11120 + 2);
11121 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
11122 rela.r_addend = 0;
11123 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11124 loc += sizeof (Elf32_External_Rela);
11125
11126 /* Output the @l relocation for the second instruction. */
11127 rela.r_offset = (htab->elf.splt->output_section->vma
11128 + htab->elf.splt->output_offset
11129 + 6);
11130 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
11131 rela.r_addend = 0;
11132 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11133 loc += sizeof (Elf32_External_Rela);
11134
11135 /* Fix up the remaining relocations. They may have the wrong
11136 symbol index for _G_O_T_ or _P_L_T_ depending on the order
11137 in which symbols were output. */
11138 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
11139 {
11140 Elf_Internal_Rela rel;
11141
11142 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11143 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
11144 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11145 loc += sizeof (Elf32_External_Rela);
11146
11147 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11148 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
11149 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11150 loc += sizeof (Elf32_External_Rela);
11151
11152 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11153 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
11154 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11155 loc += sizeof (Elf32_External_Rela);
11156 }
11157 }
11158 }
11159
11160 if (htab->glink != NULL
11161 && htab->glink->contents != NULL
11162 && htab->elf.dynamic_sections_created)
11163 {
11164 unsigned char *p;
11165 unsigned char *endp;
11166 bfd_vma res0;
11167
11168 /*
11169 * PIC glink code is the following:
11170 *
11171 * # ith PLT code stub.
11172 * addis 11,30,(plt+(i-1)*4-got)@ha
11173 * lwz 11,(plt+(i-1)*4-got)@l(11)
11174 * mtctr 11
11175 * bctr
11176 *
11177 * # A table of branches, one for each plt entry.
11178 * # The idea is that the plt call stub loads ctr and r11 with these
11179 * # addresses, so (r11 - res_0) gives the plt index * 4.
11180 * res_0: b PLTresolve
11181 * res_1: b PLTresolve
11182 * .
11183 * # Some number of entries towards the end can be nops
11184 * res_n_m3: nop
11185 * res_n_m2: nop
11186 * res_n_m1:
11187 *
11188 * PLTresolve:
11189 * addis 11,11,(1f-res_0)@ha
11190 * mflr 0
11191 * bcl 20,31,1f
11192 * 1: addi 11,11,(1b-res_0)@l
11193 * mflr 12
11194 * mtlr 0
11195 * sub 11,11,12 # r11 = index * 4
11196 * addis 12,12,(got+4-1b)@ha
11197 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
11198 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
11199 * mtctr 0
11200 * add 0,11,11
11201 * add 11,0,11 # r11 = index * 12 = reloc offset.
11202 * bctr
11203 *
11204 * Non-PIC glink code is a little simpler.
11205 *
11206 * # ith PLT code stub.
11207 * lis 11,(plt+(i-1)*4)@ha
11208 * lwz 11,(plt+(i-1)*4)@l(11)
11209 * mtctr 11
11210 * bctr
11211 *
11212 * The branch table is the same, then comes
11213 *
11214 * PLTresolve:
11215 * lis 12,(got+4)@ha
11216 * addis 11,11,(-res_0)@ha
11217 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
11218 * addi 11,11,(-res_0)@l # r11 = index * 4
11219 * mtctr 0
11220 * add 0,11,11
11221 * lwz 12,(got+8)@l(12) # got[2] contains the map address
11222 * add 11,0,11 # r11 = index * 12 = reloc offset.
11223 * bctr
11224 */
11225
11226 /* Build the branch table, one for each plt entry (less one),
11227 and perhaps some padding. */
11228 p = htab->glink->contents;
11229 p += htab->glink_pltresolve;
11230 endp = htab->glink->contents;
11231 endp += htab->glink->size - GLINK_PLTRESOLVE;
11232 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
11233 {
11234 bfd_put_32 (output_bfd, B + endp - p, p);
11235 p += 4;
11236 }
11237 while (p < endp)
11238 {
11239 bfd_put_32 (output_bfd, NOP, p);
11240 p += 4;
11241 }
11242
11243 res0 = (htab->glink_pltresolve
11244 + htab->glink->output_section->vma
11245 + htab->glink->output_offset);
11246
11247 if (htab->params->ppc476_workaround)
11248 {
11249 /* Ensure that a call stub at the end of a page doesn't
11250 result in prefetch over the end of the page into the
11251 glink branch table. */
11252 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
11253 bfd_vma page_addr;
11254 bfd_vma glink_start = (htab->glink->output_section->vma
11255 + htab->glink->output_offset);
11256
11257 for (page_addr = res0 & -pagesize;
11258 page_addr > glink_start;
11259 page_addr -= pagesize)
11260 {
11261 /* We have a plt call stub that may need fixing. */
11262 bfd_byte *loc;
11263 unsigned int insn;
11264
11265 loc = htab->glink->contents + page_addr - 4 - glink_start;
11266 insn = bfd_get_32 (output_bfd, loc);
11267 if (insn == BCTR)
11268 {
11269 /* By alignment, we know that there must be at least
11270 one other call stub before this one. */
11271 insn = bfd_get_32 (output_bfd, loc - 16);
11272 if (insn == BCTR)
11273 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
11274 else
11275 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
11276 }
11277 }
11278 }
11279
11280 /* Last comes the PLTresolve stub. */
11281 endp = p + GLINK_PLTRESOLVE;
11282 if (bfd_link_pic (info))
11283 {
11284 bfd_vma bcl;
11285
11286 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
11287 + htab->glink->output_section->vma
11288 + htab->glink->output_offset);
11289
11290 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (bcl - res0), p);
11291 p += 4;
11292 bfd_put_32 (output_bfd, MFLR_0, p);
11293 p += 4;
11294 bfd_put_32 (output_bfd, BCL_20_31, p);
11295 p += 4;
11296 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (bcl - res0), p);
11297 p += 4;
11298 bfd_put_32 (output_bfd, MFLR_12, p);
11299 p += 4;
11300 bfd_put_32 (output_bfd, MTLR_0, p);
11301 p += 4;
11302 bfd_put_32 (output_bfd, SUB_11_11_12, p);
11303 p += 4;
11304 bfd_put_32 (output_bfd, ADDIS_12_12 + PPC_HA (got + 4 - bcl), p);
11305 p += 4;
11306 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
11307 {
11308 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4 - bcl), p);
11309 p += 4;
11310 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8 - bcl), p);
11311 p += 4;
11312 }
11313 else
11314 {
11315 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4 - bcl), p);
11316 p += 4;
11317 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
11318 p += 4;
11319 }
11320 bfd_put_32 (output_bfd, MTCTR_0, p);
11321 p += 4;
11322 bfd_put_32 (output_bfd, ADD_0_11_11, p);
11323 }
11324 else
11325 {
11326 bfd_put_32 (output_bfd, LIS_12 + PPC_HA (got + 4), p);
11327 p += 4;
11328 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (-res0), p);
11329 p += 4;
11330 if (PPC_HA (got + 4) == PPC_HA (got + 8))
11331 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4), p);
11332 else
11333 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4), p);
11334 p += 4;
11335 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (-res0), p);
11336 p += 4;
11337 bfd_put_32 (output_bfd, MTCTR_0, p);
11338 p += 4;
11339 bfd_put_32 (output_bfd, ADD_0_11_11, p);
11340 p += 4;
11341 if (PPC_HA (got + 4) == PPC_HA (got + 8))
11342 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8), p);
11343 else
11344 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
11345 }
11346 p += 4;
11347 bfd_put_32 (output_bfd, ADD_11_0_11, p);
11348 p += 4;
11349 bfd_put_32 (output_bfd, BCTR, p);
11350 p += 4;
11351 while (p < endp)
11352 {
11353 bfd_put_32 (output_bfd,
11354 htab->params->ppc476_workaround ? BA : NOP, p);
11355 p += 4;
11356 }
11357 BFD_ASSERT (p == endp);
11358 }
11359
11360 if (htab->glink_eh_frame != NULL
11361 && htab->glink_eh_frame->contents != NULL)
11362 {
11363 unsigned char *p = htab->glink_eh_frame->contents;
11364 bfd_vma val;
11365
11366 p += sizeof (glink_eh_frame_cie);
11367 /* FDE length. */
11368 p += 4;
11369 /* CIE pointer. */
11370 p += 4;
11371 /* Offset to .glink. */
11372 val = (htab->glink->output_section->vma
11373 + htab->glink->output_offset);
11374 val -= (htab->glink_eh_frame->output_section->vma
11375 + htab->glink_eh_frame->output_offset);
11376 val -= p - htab->glink_eh_frame->contents;
11377 bfd_put_32 (htab->elf.dynobj, val, p);
11378
11379 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
11380 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
11381 htab->glink_eh_frame,
11382 htab->glink_eh_frame->contents))
11383 return FALSE;
11384 }
11385
11386 return ret;
11387 }
11388 \f
11389 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
11390 #define TARGET_LITTLE_NAME "elf32-powerpcle"
11391 #define TARGET_BIG_SYM powerpc_elf32_vec
11392 #define TARGET_BIG_NAME "elf32-powerpc"
11393 #define ELF_ARCH bfd_arch_powerpc
11394 #define ELF_TARGET_ID PPC32_ELF_DATA
11395 #define ELF_MACHINE_CODE EM_PPC
11396 #define ELF_MAXPAGESIZE 0x10000
11397 #define ELF_COMMONPAGESIZE 0x1000
11398 #define ELF_RELROPAGESIZE ELF_MAXPAGESIZE
11399 #define elf_info_to_howto ppc_elf_info_to_howto
11400
11401 #ifdef EM_CYGNUS_POWERPC
11402 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
11403 #endif
11404
11405 #ifdef EM_PPC_OLD
11406 #define ELF_MACHINE_ALT2 EM_PPC_OLD
11407 #endif
11408
11409 #define elf_backend_plt_not_loaded 1
11410 #define elf_backend_want_dynrelro 1
11411 #define elf_backend_can_gc_sections 1
11412 #define elf_backend_can_refcount 1
11413 #define elf_backend_rela_normal 1
11414 #define elf_backend_caches_rawsize 1
11415
11416 #define bfd_elf32_mkobject ppc_elf_mkobject
11417 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
11418 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
11419 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
11420 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
11421 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
11422 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
11423 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
11424
11425 #define elf_backend_object_p ppc_elf_object_p
11426 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
11427 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
11428 #define elf_backend_relocate_section ppc_elf_relocate_section
11429 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
11430 #define elf_backend_check_relocs ppc_elf_check_relocs
11431 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
11432 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
11433 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
11434 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
11435 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
11436 #define elf_backend_hash_symbol ppc_elf_hash_symbol
11437 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
11438 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
11439 #define elf_backend_fake_sections ppc_elf_fake_sections
11440 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
11441 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
11442 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
11443 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
11444 #define elf_backend_write_core_note ppc_elf_write_core_note
11445 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
11446 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
11447 #define elf_backend_final_write_processing ppc_elf_final_write_processing
11448 #define elf_backend_write_section ppc_elf_write_section
11449 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
11450 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
11451 #define elf_backend_action_discarded ppc_elf_action_discarded
11452 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
11453 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
11454
11455 #include "elf32-target.h"
11456
11457 /* FreeBSD Target */
11458
11459 #undef TARGET_LITTLE_SYM
11460 #undef TARGET_LITTLE_NAME
11461
11462 #undef TARGET_BIG_SYM
11463 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
11464 #undef TARGET_BIG_NAME
11465 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
11466
11467 #undef ELF_OSABI
11468 #define ELF_OSABI ELFOSABI_FREEBSD
11469
11470 #undef elf32_bed
11471 #define elf32_bed elf32_powerpc_fbsd_bed
11472
11473 #include "elf32-target.h"
11474
11475 /* VxWorks Target */
11476
11477 #undef TARGET_LITTLE_SYM
11478 #undef TARGET_LITTLE_NAME
11479
11480 #undef TARGET_BIG_SYM
11481 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
11482 #undef TARGET_BIG_NAME
11483 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
11484
11485 #undef ELF_OSABI
11486
11487 /* VxWorks uses the elf default section flags for .plt. */
11488 static const struct bfd_elf_special_section *
11489 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
11490 {
11491 if (sec->name == NULL)
11492 return NULL;
11493
11494 if (strcmp (sec->name, ".plt") == 0)
11495 return _bfd_elf_get_sec_type_attr (abfd, sec);
11496
11497 return ppc_elf_get_sec_type_attr (abfd, sec);
11498 }
11499
11500 /* Like ppc_elf_link_hash_table_create, but overrides
11501 appropriately for VxWorks. */
11502 static struct bfd_link_hash_table *
11503 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11504 {
11505 struct bfd_link_hash_table *ret;
11506
11507 ret = ppc_elf_link_hash_table_create (abfd);
11508 if (ret)
11509 {
11510 struct ppc_elf_link_hash_table *htab
11511 = (struct ppc_elf_link_hash_table *)ret;
11512 htab->is_vxworks = 1;
11513 htab->plt_type = PLT_VXWORKS;
11514 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11515 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11516 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11517 }
11518 return ret;
11519 }
11520
11521 /* Tweak magic VxWorks symbols as they are loaded. */
11522 static bfd_boolean
11523 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11524 struct bfd_link_info *info,
11525 Elf_Internal_Sym *sym,
11526 const char **namep,
11527 flagword *flagsp,
11528 asection **secp,
11529 bfd_vma *valp)
11530 {
11531 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
11532 valp))
11533 return FALSE;
11534
11535 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
11536 }
11537
11538 static void
11539 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11540 {
11541 ppc_elf_final_write_processing (abfd, linker);
11542 elf_vxworks_final_write_processing (abfd, linker);
11543 }
11544
11545 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11546 define it. */
11547 #undef elf_backend_want_plt_sym
11548 #define elf_backend_want_plt_sym 1
11549 #undef elf_backend_want_got_plt
11550 #define elf_backend_want_got_plt 1
11551 #undef elf_backend_got_symbol_offset
11552 #define elf_backend_got_symbol_offset 0
11553 #undef elf_backend_plt_not_loaded
11554 #define elf_backend_plt_not_loaded 0
11555 #undef elf_backend_plt_readonly
11556 #define elf_backend_plt_readonly 1
11557 #undef elf_backend_got_header_size
11558 #define elf_backend_got_header_size 12
11559 #undef elf_backend_dtrel_excludes_plt
11560 #define elf_backend_dtrel_excludes_plt 1
11561
11562 #undef bfd_elf32_get_synthetic_symtab
11563
11564 #undef bfd_elf32_bfd_link_hash_table_create
11565 #define bfd_elf32_bfd_link_hash_table_create \
11566 ppc_elf_vxworks_link_hash_table_create
11567 #undef elf_backend_add_symbol_hook
11568 #define elf_backend_add_symbol_hook \
11569 ppc_elf_vxworks_add_symbol_hook
11570 #undef elf_backend_link_output_symbol_hook
11571 #define elf_backend_link_output_symbol_hook \
11572 elf_vxworks_link_output_symbol_hook
11573 #undef elf_backend_final_write_processing
11574 #define elf_backend_final_write_processing \
11575 ppc_elf_vxworks_final_write_processing
11576 #undef elf_backend_get_sec_type_attr
11577 #define elf_backend_get_sec_type_attr \
11578 ppc_elf_vxworks_get_sec_type_attr
11579 #undef elf_backend_emit_relocs
11580 #define elf_backend_emit_relocs \
11581 elf_vxworks_emit_relocs
11582
11583 #undef elf32_bed
11584 #define elf32_bed ppc_elf_vxworks_bed
11585 #undef elf_backend_post_process_headers
11586
11587 #include "elf32-target.h"
GDB Binutils - Deliverables
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