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