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PowerPC PLT16 relocations
[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 \f
5089 /* Set plt output section type, htab->tls_get_addr, and call the
5090 generic ELF tls_setup function. */
5091
5092 asection *
5093 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5094 {
5095 struct ppc_elf_link_hash_table *htab;
5096
5097 htab = ppc_elf_hash_table (info);
5098 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5099 FALSE, FALSE, TRUE);
5100 if (htab->plt_type != PLT_NEW)
5101 htab->params->no_tls_get_addr_opt = TRUE;
5102
5103 if (!htab->params->no_tls_get_addr_opt)
5104 {
5105 struct elf_link_hash_entry *opt, *tga;
5106 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5107 FALSE, FALSE, TRUE);
5108 if (opt != NULL
5109 && (opt->root.type == bfd_link_hash_defined
5110 || opt->root.type == bfd_link_hash_defweak))
5111 {
5112 /* If glibc supports an optimized __tls_get_addr call stub,
5113 signalled by the presence of __tls_get_addr_opt, and we'll
5114 be calling __tls_get_addr via a plt call stub, then
5115 make __tls_get_addr point to __tls_get_addr_opt. */
5116 tga = htab->tls_get_addr;
5117 if (htab->elf.dynamic_sections_created
5118 && tga != NULL
5119 && (tga->type == STT_FUNC
5120 || tga->needs_plt)
5121 && !(SYMBOL_CALLS_LOCAL (info, tga)
5122 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5123 {
5124 struct plt_entry *ent;
5125 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5126 if (ent->plt.refcount > 0)
5127 break;
5128 if (ent != NULL)
5129 {
5130 tga->root.type = bfd_link_hash_indirect;
5131 tga->root.u.i.link = &opt->root;
5132 ppc_elf_copy_indirect_symbol (info, opt, tga);
5133 opt->mark = 1;
5134 if (opt->dynindx != -1)
5135 {
5136 /* Use __tls_get_addr_opt in dynamic relocations. */
5137 opt->dynindx = -1;
5138 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5139 opt->dynstr_index);
5140 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5141 return FALSE;
5142 }
5143 htab->tls_get_addr = opt;
5144 }
5145 }
5146 }
5147 else
5148 htab->params->no_tls_get_addr_opt = TRUE;
5149 }
5150 if (htab->plt_type == PLT_NEW
5151 && htab->elf.splt != NULL
5152 && htab->elf.splt->output_section != NULL)
5153 {
5154 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5155 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5156 }
5157
5158 return _bfd_elf_tls_setup (obfd, info);
5159 }
5160
5161 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5162 HASH. */
5163
5164 static bfd_boolean
5165 branch_reloc_hash_match (const bfd *ibfd,
5166 const Elf_Internal_Rela *rel,
5167 const struct elf_link_hash_entry *hash)
5168 {
5169 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5170 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5171 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5172
5173 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5174 {
5175 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5176 struct elf_link_hash_entry *h;
5177
5178 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5179 while (h->root.type == bfd_link_hash_indirect
5180 || h->root.type == bfd_link_hash_warning)
5181 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5182 if (h == hash)
5183 return TRUE;
5184 }
5185 return FALSE;
5186 }
5187
5188 /* Run through all the TLS relocs looking for optimization
5189 opportunities. */
5190
5191 bfd_boolean
5192 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5193 struct bfd_link_info *info)
5194 {
5195 bfd *ibfd;
5196 asection *sec;
5197 struct ppc_elf_link_hash_table *htab;
5198 int pass;
5199
5200 if (!bfd_link_executable (info))
5201 return TRUE;
5202
5203 htab = ppc_elf_hash_table (info);
5204 if (htab == NULL)
5205 return FALSE;
5206
5207 /* Make two passes through the relocs. First time check that tls
5208 relocs involved in setting up a tls_get_addr call are indeed
5209 followed by such a call. If they are not, don't do any tls
5210 optimization. On the second pass twiddle tls_mask flags to
5211 notify relocate_section that optimization can be done, and
5212 adjust got and plt refcounts. */
5213 for (pass = 0; pass < 2; ++pass)
5214 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5215 {
5216 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5217 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5218
5219 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5220 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5221 {
5222 Elf_Internal_Rela *relstart, *rel, *relend;
5223 int expecting_tls_get_addr = 0;
5224
5225 /* Read the relocations. */
5226 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5227 info->keep_memory);
5228 if (relstart == NULL)
5229 return FALSE;
5230
5231 relend = relstart + sec->reloc_count;
5232 for (rel = relstart; rel < relend; rel++)
5233 {
5234 enum elf_ppc_reloc_type r_type;
5235 unsigned long r_symndx;
5236 struct elf_link_hash_entry *h = NULL;
5237 unsigned char *tls_mask;
5238 unsigned char tls_set, tls_clear;
5239 bfd_boolean is_local;
5240 bfd_signed_vma *got_count;
5241
5242 r_symndx = ELF32_R_SYM (rel->r_info);
5243 if (r_symndx >= symtab_hdr->sh_info)
5244 {
5245 struct elf_link_hash_entry **sym_hashes;
5246
5247 sym_hashes = elf_sym_hashes (ibfd);
5248 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5249 while (h->root.type == bfd_link_hash_indirect
5250 || h->root.type == bfd_link_hash_warning)
5251 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5252 }
5253
5254 is_local = FALSE;
5255 if (h == NULL
5256 || !h->def_dynamic)
5257 is_local = TRUE;
5258
5259 r_type = ELF32_R_TYPE (rel->r_info);
5260 /* If this section has old-style __tls_get_addr calls
5261 without marker relocs, then check that each
5262 __tls_get_addr call reloc is preceded by a reloc
5263 that conceivably belongs to the __tls_get_addr arg
5264 setup insn. If we don't find matching arg setup
5265 relocs, don't do any tls optimization. */
5266 if (pass == 0
5267 && sec->has_tls_get_addr_call
5268 && h != NULL
5269 && h == htab->tls_get_addr
5270 && !expecting_tls_get_addr
5271 && is_branch_reloc (r_type))
5272 {
5273 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5274 "TLS optimization disabled\n",
5275 ibfd, sec, rel->r_offset);
5276 if (elf_section_data (sec)->relocs != relstart)
5277 free (relstart);
5278 return TRUE;
5279 }
5280
5281 expecting_tls_get_addr = 0;
5282 switch (r_type)
5283 {
5284 case R_PPC_GOT_TLSLD16:
5285 case R_PPC_GOT_TLSLD16_LO:
5286 expecting_tls_get_addr = 1;
5287 /* Fall through. */
5288
5289 case R_PPC_GOT_TLSLD16_HI:
5290 case R_PPC_GOT_TLSLD16_HA:
5291 /* These relocs should never be against a symbol
5292 defined in a shared lib. Leave them alone if
5293 that turns out to be the case. */
5294 if (!is_local)
5295 continue;
5296
5297 /* LD -> LE */
5298 tls_set = 0;
5299 tls_clear = TLS_LD;
5300 break;
5301
5302 case R_PPC_GOT_TLSGD16:
5303 case R_PPC_GOT_TLSGD16_LO:
5304 expecting_tls_get_addr = 1;
5305 /* Fall through. */
5306
5307 case R_PPC_GOT_TLSGD16_HI:
5308 case R_PPC_GOT_TLSGD16_HA:
5309 if (is_local)
5310 /* GD -> LE */
5311 tls_set = 0;
5312 else
5313 /* GD -> IE */
5314 tls_set = TLS_TLS | TLS_TPRELGD;
5315 tls_clear = TLS_GD;
5316 break;
5317
5318 case R_PPC_GOT_TPREL16:
5319 case R_PPC_GOT_TPREL16_LO:
5320 case R_PPC_GOT_TPREL16_HI:
5321 case R_PPC_GOT_TPREL16_HA:
5322 if (is_local)
5323 {
5324 /* IE -> LE */
5325 tls_set = 0;
5326 tls_clear = TLS_TPREL;
5327 break;
5328 }
5329 else
5330 continue;
5331
5332 case R_PPC_TLSGD:
5333 case R_PPC_TLSLD:
5334 expecting_tls_get_addr = 2;
5335 tls_set = 0;
5336 tls_clear = 0;
5337 break;
5338
5339 default:
5340 continue;
5341 }
5342
5343 if (pass == 0)
5344 {
5345 if (!expecting_tls_get_addr
5346 || (expecting_tls_get_addr == 1
5347 && !sec->has_tls_get_addr_call))
5348 continue;
5349
5350 if (rel + 1 < relend
5351 && branch_reloc_hash_match (ibfd, rel + 1,
5352 htab->tls_get_addr))
5353 continue;
5354
5355 /* Uh oh, we didn't find the expected call. We
5356 could just mark this symbol to exclude it
5357 from tls optimization but it's safer to skip
5358 the entire optimization. */
5359 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5360 "TLS optimization disabled\n"),
5361 ibfd, sec, rel->r_offset);
5362 if (elf_section_data (sec)->relocs != relstart)
5363 free (relstart);
5364 return TRUE;
5365 }
5366
5367 if (h != NULL)
5368 {
5369 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5370 got_count = &h->got.refcount;
5371 }
5372 else
5373 {
5374 bfd_signed_vma *lgot_refs;
5375 struct plt_entry **local_plt;
5376 unsigned char *lgot_masks;
5377
5378 lgot_refs = elf_local_got_refcounts (ibfd);
5379 if (lgot_refs == NULL)
5380 abort ();
5381 local_plt = (struct plt_entry **)
5382 (lgot_refs + symtab_hdr->sh_info);
5383 lgot_masks = (unsigned char *)
5384 (local_plt + symtab_hdr->sh_info);
5385 tls_mask = &lgot_masks[r_symndx];
5386 got_count = &lgot_refs[r_symndx];
5387 }
5388
5389 /* If we don't have old-style __tls_get_addr calls
5390 without TLSGD/TLSLD marker relocs, and we haven't
5391 found a new-style __tls_get_addr call with a
5392 marker for this symbol, then we either have a
5393 broken object file or an -mlongcall style
5394 indirect call to __tls_get_addr without a marker.
5395 Disable optimization in this case. */
5396 if ((tls_clear & (TLS_GD | TLS_LD)) != 0
5397 && !sec->has_tls_get_addr_call
5398 && ((*tls_mask & (TLS_TLS | TLS_MARK))
5399 != (TLS_TLS | TLS_MARK)))
5400 continue;
5401
5402 if (expecting_tls_get_addr)
5403 {
5404 struct plt_entry *ent;
5405 bfd_vma addend = 0;
5406
5407 if (bfd_link_pic (info)
5408 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5409 addend = rel[1].r_addend;
5410 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5411 got2, addend);
5412 if (ent != NULL && ent->plt.refcount > 0)
5413 ent->plt.refcount -= 1;
5414
5415 if (expecting_tls_get_addr == 2)
5416 continue;
5417 }
5418
5419 if (tls_set == 0)
5420 {
5421 /* We managed to get rid of a got entry. */
5422 if (*got_count > 0)
5423 *got_count -= 1;
5424 }
5425
5426 *tls_mask |= tls_set;
5427 *tls_mask &= ~tls_clear;
5428 }
5429
5430 if (elf_section_data (sec)->relocs != relstart)
5431 free (relstart);
5432 }
5433 }
5434 htab->do_tls_opt = 1;
5435 return TRUE;
5436 }
5437 \f
5438 /* Find dynamic relocs for H that apply to read-only sections. */
5439
5440 static asection *
5441 readonly_dynrelocs (struct elf_link_hash_entry *h)
5442 {
5443 struct elf_dyn_relocs *p;
5444
5445 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5446 {
5447 asection *s = p->sec->output_section;
5448
5449 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5450 return p->sec;
5451 }
5452 return NULL;
5453 }
5454
5455 /* Return true if we have dynamic relocs against H or any of its weak
5456 aliases, that apply to read-only sections. Cannot be used after
5457 size_dynamic_sections. */
5458
5459 static bfd_boolean
5460 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
5461 {
5462 struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h);
5463 do
5464 {
5465 if (readonly_dynrelocs (&eh->elf))
5466 return TRUE;
5467 eh = ppc_elf_hash_entry (eh->elf.u.alias);
5468 } while (eh != NULL && &eh->elf != h);
5469
5470 return FALSE;
5471 }
5472
5473 /* Return whether H has pc-relative dynamic relocs. */
5474
5475 static bfd_boolean
5476 pc_dynrelocs (struct elf_link_hash_entry *h)
5477 {
5478 struct elf_dyn_relocs *p;
5479
5480 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5481 if (p->pc_count != 0)
5482 return TRUE;
5483 return FALSE;
5484 }
5485
5486 /* Adjust a symbol defined by a dynamic object and referenced by a
5487 regular object. The current definition is in some section of the
5488 dynamic object, but we're not including those sections. We have to
5489 change the definition to something the rest of the link can
5490 understand. */
5491
5492 static bfd_boolean
5493 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5494 struct elf_link_hash_entry *h)
5495 {
5496 struct ppc_elf_link_hash_table *htab;
5497 asection *s;
5498
5499 #ifdef DEBUG
5500 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5501 h->root.root.string);
5502 #endif
5503
5504 /* Make sure we know what is going on here. */
5505 htab = ppc_elf_hash_table (info);
5506 BFD_ASSERT (htab->elf.dynobj != NULL
5507 && (h->needs_plt
5508 || h->type == STT_GNU_IFUNC
5509 || h->is_weakalias
5510 || (h->def_dynamic
5511 && h->ref_regular
5512 && !h->def_regular)));
5513
5514 /* Deal with function syms. */
5515 if (h->type == STT_FUNC
5516 || h->type == STT_GNU_IFUNC
5517 || h->needs_plt)
5518 {
5519 bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, h)
5520 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
5521 /* Discard dyn_relocs when non-pic if we've decided that a
5522 function symbol is local. */
5523 if (!bfd_link_pic (info) && local)
5524 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5525
5526 /* Clear procedure linkage table information for any symbol that
5527 won't need a .plt entry. */
5528 struct plt_entry *ent;
5529 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5530 if (ent->plt.refcount > 0)
5531 break;
5532 if (ent == NULL
5533 || (h->type != STT_GNU_IFUNC && local))
5534 {
5535 /* A PLT entry is not required/allowed when:
5536
5537 1. We are not using ld.so; because then the PLT entry
5538 can't be set up, so we can't use one. In this case,
5539 ppc_elf_adjust_dynamic_symbol won't even be called.
5540
5541 2. GC has rendered the entry unused.
5542
5543 3. We know for certain that a call to this symbol
5544 will go to this object, or will remain undefined. */
5545 h->plt.plist = NULL;
5546 h->needs_plt = 0;
5547 h->pointer_equality_needed = 0;
5548 }
5549 else
5550 {
5551 /* Taking a function's address in a read/write section
5552 doesn't require us to define the function symbol in the
5553 executable on a plt call stub. A dynamic reloc can
5554 be used instead, giving better runtime performance.
5555 (Calls via that function pointer don't need to bounce
5556 through the plt call stub.) Similarly, use a dynamic
5557 reloc for a weak reference when possible, allowing the
5558 resolution of the symbol to be set at load time rather
5559 than link time. */
5560 if ((h->pointer_equality_needed
5561 || (h->non_got_ref
5562 && !h->ref_regular_nonweak
5563 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5564 && !htab->is_vxworks
5565 && !ppc_elf_hash_entry (h)->has_sda_refs
5566 && !readonly_dynrelocs (h))
5567 {
5568 h->pointer_equality_needed = 0;
5569 /* If we haven't seen a branch reloc then we don't need
5570 a plt entry. */
5571 if (!h->needs_plt)
5572 h->plt.plist = NULL;
5573 }
5574 else if (!bfd_link_pic (info))
5575 /* We are going to be defining the function symbol on the
5576 plt stub, so no dyn_relocs needed when non-pic. */
5577 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5578 }
5579 h->protected_def = 0;
5580 /* Function symbols can't have copy relocs. */
5581 return TRUE;
5582 }
5583 else
5584 h->plt.plist = NULL;
5585
5586 /* If this is a weak symbol, and there is a real definition, the
5587 processor independent code will have arranged for us to see the
5588 real definition first, and we can just use the same value. */
5589 if (h->is_weakalias)
5590 {
5591 struct elf_link_hash_entry *def = weakdef (h);
5592 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5593 h->root.u.def.section = def->root.u.def.section;
5594 h->root.u.def.value = def->root.u.def.value;
5595 if (def->root.u.def.section == htab->elf.sdynbss
5596 || def->root.u.def.section == htab->elf.sdynrelro
5597 || def->root.u.def.section == htab->dynsbss)
5598 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5599 return TRUE;
5600 }
5601
5602 /* This is a reference to a symbol defined by a dynamic object which
5603 is not a function. */
5604
5605 /* If we are creating a shared library, we must presume that the
5606 only references to the symbol are via the global offset table.
5607 For such cases we need not do anything here; the relocations will
5608 be handled correctly by relocate_section. */
5609 if (bfd_link_pic (info))
5610 {
5611 h->protected_def = 0;
5612 return TRUE;
5613 }
5614
5615 /* If there are no references to this symbol that do not use the
5616 GOT, we don't need to generate a copy reloc. */
5617 if (!h->non_got_ref)
5618 {
5619 h->protected_def = 0;
5620 return TRUE;
5621 }
5622
5623 /* Protected variables do not work with .dynbss. The copy in
5624 .dynbss won't be used by the shared library with the protected
5625 definition for the variable. Editing to PIC, or text relocations
5626 are preferable to an incorrect program. */
5627 if (h->protected_def)
5628 {
5629 if (ELIMINATE_COPY_RELOCS
5630 && ppc_elf_hash_entry (h)->has_addr16_ha
5631 && ppc_elf_hash_entry (h)->has_addr16_lo
5632 && htab->params->pic_fixup == 0
5633 && info->disable_target_specific_optimizations <= 1)
5634 htab->params->pic_fixup = 1;
5635 return TRUE;
5636 }
5637
5638 /* If -z nocopyreloc was given, we won't generate them either. */
5639 if (info->nocopyreloc)
5640 return TRUE;
5641
5642 /* If we don't find any dynamic relocs in read-only sections, then
5643 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5644 We can't do this if there are any small data relocations. This
5645 doesn't work on VxWorks, where we can not have dynamic
5646 relocations (other than copy and jump slot relocations) in an
5647 executable. */
5648 if (ELIMINATE_COPY_RELOCS
5649 && !ppc_elf_hash_entry (h)->has_sda_refs
5650 && !htab->is_vxworks
5651 && !h->def_regular
5652 && !alias_readonly_dynrelocs (h))
5653 return TRUE;
5654
5655 /* We must allocate the symbol in our .dynbss section, which will
5656 become part of the .bss section of the executable. There will be
5657 an entry for this symbol in the .dynsym section. The dynamic
5658 object will contain position independent code, so all references
5659 from the dynamic object to this symbol will go through the global
5660 offset table. The dynamic linker will use the .dynsym entry to
5661 determine the address it must put in the global offset table, so
5662 both the dynamic object and the regular object will refer to the
5663 same memory location for the variable.
5664
5665 Of course, if the symbol is referenced using SDAREL relocs, we
5666 must instead allocate it in .sbss. */
5667 if (ppc_elf_hash_entry (h)->has_sda_refs)
5668 s = htab->dynsbss;
5669 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5670 s = htab->elf.sdynrelro;
5671 else
5672 s = htab->elf.sdynbss;
5673 BFD_ASSERT (s != NULL);
5674
5675 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5676 {
5677 asection *srel;
5678
5679 /* We must generate a R_PPC_COPY reloc to tell the dynamic
5680 linker to copy the initial value out of the dynamic object
5681 and into the runtime process image. */
5682 if (ppc_elf_hash_entry (h)->has_sda_refs)
5683 srel = htab->relsbss;
5684 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5685 srel = htab->elf.sreldynrelro;
5686 else
5687 srel = htab->elf.srelbss;
5688 BFD_ASSERT (srel != NULL);
5689 srel->size += sizeof (Elf32_External_Rela);
5690 h->needs_copy = 1;
5691 }
5692
5693 /* We no longer want dyn_relocs. */
5694 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5695 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5696 }
5697 \f
5698 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5699 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5700 specifying the addend on the plt relocation. For -fpic code, the sym
5701 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5702 xxxxxxxx.got2.plt_pic32.<callee>. */
5703
5704 static bfd_boolean
5705 add_stub_sym (struct plt_entry *ent,
5706 struct elf_link_hash_entry *h,
5707 struct bfd_link_info *info)
5708 {
5709 struct elf_link_hash_entry *sh;
5710 size_t len1, len2, len3;
5711 char *name;
5712 const char *stub;
5713 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5714
5715 if (bfd_link_pic (info))
5716 stub = ".plt_pic32.";
5717 else
5718 stub = ".plt_call32.";
5719
5720 len1 = strlen (h->root.root.string);
5721 len2 = strlen (stub);
5722 len3 = 0;
5723 if (ent->sec)
5724 len3 = strlen (ent->sec->name);
5725 name = bfd_malloc (len1 + len2 + len3 + 9);
5726 if (name == NULL)
5727 return FALSE;
5728 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5729 if (ent->sec)
5730 memcpy (name + 8, ent->sec->name, len3);
5731 memcpy (name + 8 + len3, stub, len2);
5732 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5733 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5734 if (sh == NULL)
5735 return FALSE;
5736 if (sh->root.type == bfd_link_hash_new)
5737 {
5738 sh->root.type = bfd_link_hash_defined;
5739 sh->root.u.def.section = htab->glink;
5740 sh->root.u.def.value = ent->glink_offset;
5741 sh->ref_regular = 1;
5742 sh->def_regular = 1;
5743 sh->ref_regular_nonweak = 1;
5744 sh->forced_local = 1;
5745 sh->non_elf = 0;
5746 sh->root.linker_def = 1;
5747 }
5748 return TRUE;
5749 }
5750
5751 /* Allocate NEED contiguous space in .got, and return the offset.
5752 Handles allocation of the got header when crossing 32k. */
5753
5754 static bfd_vma
5755 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5756 {
5757 bfd_vma where;
5758 unsigned int max_before_header;
5759
5760 if (htab->plt_type == PLT_VXWORKS)
5761 {
5762 where = htab->elf.sgot->size;
5763 htab->elf.sgot->size += need;
5764 }
5765 else
5766 {
5767 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5768 if (need <= htab->got_gap)
5769 {
5770 where = max_before_header - htab->got_gap;
5771 htab->got_gap -= need;
5772 }
5773 else
5774 {
5775 if (htab->elf.sgot->size + need > max_before_header
5776 && htab->elf.sgot->size <= max_before_header)
5777 {
5778 htab->got_gap = max_before_header - htab->elf.sgot->size;
5779 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5780 }
5781 where = htab->elf.sgot->size;
5782 htab->elf.sgot->size += need;
5783 }
5784 }
5785 return where;
5786 }
5787
5788 /* Calculate size of GOT entries for symbol given its TLS_MASK.
5789 TLS_LD is excluded because those go in a special GOT slot. */
5790
5791 static inline unsigned int
5792 got_entries_needed (int tls_mask)
5793 {
5794 unsigned int need;
5795 if ((tls_mask & TLS_TLS) == 0)
5796 need = 4;
5797 else
5798 {
5799 need = 0;
5800 if ((tls_mask & TLS_GD) != 0)
5801 need += 8;
5802 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5803 need += 4;
5804 if ((tls_mask & TLS_DTPREL) != 0)
5805 need += 4;
5806 }
5807 return need;
5808 }
5809
5810 /* Calculate size of relocs needed for symbol given its TLS_MASK and
5811 NEEDed GOT entries. KNOWN says a TPREL offset can be calculated at
5812 link time. */
5813
5814 static inline unsigned int
5815 got_relocs_needed (int tls_mask, unsigned int need, bfd_boolean known)
5816 {
5817 /* All the entries we allocated need relocs.
5818 Except IE in executable with a local symbol. We could also omit
5819 the DTPREL reloc on the second word of a GD entry under the same
5820 condition as that for IE, but ld.so needs to differentiate
5821 LD and GD entries. */
5822 if (known && (tls_mask & TLS_TLS) != 0
5823 && (tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5824 need -= 4;
5825 return need * sizeof (Elf32_External_Rela) / 4;
5826 }
5827
5828 /* If H is undefined, make it dynamic if that makes sense. */
5829
5830 static bfd_boolean
5831 ensure_undef_dynamic (struct bfd_link_info *info,
5832 struct elf_link_hash_entry *h)
5833 {
5834 struct elf_link_hash_table *htab = elf_hash_table (info);
5835
5836 if (htab->dynamic_sections_created
5837 && ((info->dynamic_undefined_weak != 0
5838 && h->root.type == bfd_link_hash_undefweak)
5839 || h->root.type == bfd_link_hash_undefined)
5840 && h->dynindx == -1
5841 && !h->forced_local
5842 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5843 return bfd_elf_link_record_dynamic_symbol (info, h);
5844 return TRUE;
5845 }
5846
5847 /* Allocate space in associated reloc sections for dynamic relocs. */
5848
5849 static bfd_boolean
5850 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5851 {
5852 struct bfd_link_info *info = inf;
5853 struct ppc_elf_link_hash_entry *eh;
5854 struct ppc_elf_link_hash_table *htab;
5855 struct elf_dyn_relocs *p;
5856 bfd_boolean dyn;
5857
5858 if (h->root.type == bfd_link_hash_indirect)
5859 return TRUE;
5860
5861 htab = ppc_elf_hash_table (info);
5862 eh = (struct ppc_elf_link_hash_entry *) h;
5863 if (eh->elf.got.refcount > 0
5864 || (ELIMINATE_COPY_RELOCS
5865 && !eh->elf.def_regular
5866 && eh->elf.protected_def
5867 && eh->has_addr16_ha
5868 && eh->has_addr16_lo
5869 && htab->params->pic_fixup > 0))
5870 {
5871 unsigned int need;
5872
5873 /* Make sure this symbol is output as a dynamic symbol. */
5874 if (!ensure_undef_dynamic (info, &eh->elf))
5875 return FALSE;
5876
5877 need = 0;
5878 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
5879 {
5880 if (!eh->elf.def_dynamic)
5881 /* We'll just use htab->tlsld_got.offset. This should
5882 always be the case. It's a little odd if we have
5883 a local dynamic reloc against a non-local symbol. */
5884 htab->tlsld_got.refcount += 1;
5885 else
5886 need += 8;
5887 }
5888 need += got_entries_needed (eh->tls_mask);
5889 if (need == 0)
5890 eh->elf.got.offset = (bfd_vma) -1;
5891 else
5892 {
5893 eh->elf.got.offset = allocate_got (htab, need);
5894 if ((bfd_link_pic (info)
5895 || (htab->elf.dynamic_sections_created
5896 && eh->elf.dynindx != -1
5897 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
5898 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
5899 {
5900 asection *rsec;
5901 bfd_boolean tprel_known = (bfd_link_executable (info)
5902 && SYMBOL_REFERENCES_LOCAL (info,
5903 &eh->elf));
5904
5905 need = got_relocs_needed (eh->tls_mask, need, tprel_known);
5906 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD)
5907 && eh->elf.def_dynamic)
5908 need -= sizeof (Elf32_External_Rela);
5909 rsec = htab->elf.srelgot;
5910 if (eh->elf.type == STT_GNU_IFUNC)
5911 rsec = htab->elf.irelplt;
5912 rsec->size += need;
5913 }
5914 }
5915 }
5916 else
5917 eh->elf.got.offset = (bfd_vma) -1;
5918
5919 /* If no dynamic sections we can't have dynamic relocs, except for
5920 IFUNCs which are handled even in static executables. */
5921 if (!htab->elf.dynamic_sections_created
5922 && h->type != STT_GNU_IFUNC)
5923 eh->dyn_relocs = NULL;
5924
5925 /* Discard relocs on undefined symbols that must be local. */
5926 else if (h->root.type == bfd_link_hash_undefined
5927 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5928 eh->dyn_relocs = NULL;
5929
5930 /* Also discard relocs on undefined weak syms with non-default
5931 visibility, or when dynamic_undefined_weak says so. */
5932 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
5933 eh->dyn_relocs = NULL;
5934
5935 if (eh->dyn_relocs == NULL)
5936 ;
5937
5938 /* In the shared -Bsymbolic case, discard space allocated for
5939 dynamic pc-relative relocs against symbols which turn out to be
5940 defined in regular objects. For the normal shared case, discard
5941 space for relocs that have become local due to symbol visibility
5942 changes. */
5943 else if (bfd_link_pic (info))
5944 {
5945 /* Relocs that use pc_count are those that appear on a call insn,
5946 or certain REL relocs (see must_be_dyn_reloc) that can be
5947 generated via assembly. We want calls to protected symbols to
5948 resolve directly to the function rather than going via the plt.
5949 If people want function pointer comparisons to work as expected
5950 then they should avoid writing weird assembly. */
5951 if (SYMBOL_CALLS_LOCAL (info, h))
5952 {
5953 struct elf_dyn_relocs **pp;
5954
5955 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5956 {
5957 p->count -= p->pc_count;
5958 p->pc_count = 0;
5959 if (p->count == 0)
5960 *pp = p->next;
5961 else
5962 pp = &p->next;
5963 }
5964 }
5965
5966 if (htab->is_vxworks)
5967 {
5968 struct elf_dyn_relocs **pp;
5969
5970 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5971 {
5972 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5973 *pp = p->next;
5974 else
5975 pp = &p->next;
5976 }
5977 }
5978
5979 if (eh->dyn_relocs != NULL)
5980 {
5981 /* Make sure this symbol is output as a dynamic symbol. */
5982 if (!ensure_undef_dynamic (info, h))
5983 return FALSE;
5984 }
5985 }
5986 else if (ELIMINATE_COPY_RELOCS)
5987 {
5988 /* For the non-pic case, discard space for relocs against
5989 symbols which turn out to need copy relocs or are not
5990 dynamic. */
5991 if (h->dynamic_adjusted
5992 && !h->def_regular
5993 && !ELF_COMMON_DEF_P (h)
5994 && !(h->protected_def
5995 && eh->has_addr16_ha
5996 && eh->has_addr16_lo
5997 && htab->params->pic_fixup > 0))
5998 {
5999 /* Make sure this symbol is output as a dynamic symbol. */
6000 if (!ensure_undef_dynamic (info, h))
6001 return FALSE;
6002
6003 if (h->dynindx == -1)
6004 eh->dyn_relocs = NULL;
6005 }
6006 else
6007 eh->dyn_relocs = NULL;
6008 }
6009
6010 /* Allocate space. */
6011 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6012 {
6013 asection *sreloc = elf_section_data (p->sec)->sreloc;
6014 if (eh->elf.type == STT_GNU_IFUNC)
6015 sreloc = htab->elf.irelplt;
6016 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6017 }
6018
6019 /* Handle PLT relocs. Done last, after dynindx has settled. */
6020 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6021 if (dyn || h->type == STT_GNU_IFUNC)
6022 {
6023 struct plt_entry *ent;
6024 bfd_boolean doneone = FALSE;
6025 bfd_vma plt_offset = 0, glink_offset = 0;
6026
6027 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6028 if (ent->plt.refcount > 0)
6029 {
6030 asection *s = htab->elf.splt;
6031
6032 if (!dyn)
6033 s = htab->elf.iplt;
6034
6035 if (htab->plt_type == PLT_NEW || !dyn)
6036 {
6037 if (!doneone)
6038 {
6039 plt_offset = s->size;
6040 s->size += 4;
6041 }
6042 ent->plt.offset = plt_offset;
6043
6044 s = htab->glink;
6045 if (!doneone || bfd_link_pic (info))
6046 {
6047 glink_offset = s->size;
6048 s->size += GLINK_ENTRY_SIZE (htab, h);
6049 }
6050 if (!doneone
6051 && !bfd_link_pic (info)
6052 && h->def_dynamic
6053 && !h->def_regular)
6054 {
6055 h->root.u.def.section = s;
6056 h->root.u.def.value = glink_offset;
6057 }
6058 ent->glink_offset = glink_offset;
6059
6060 if (htab->params->emit_stub_syms
6061 && !add_stub_sym (ent, h, info))
6062 return FALSE;
6063 }
6064 else
6065 {
6066 if (!doneone)
6067 {
6068 /* If this is the first .plt entry, make room
6069 for the special first entry. */
6070 if (s->size == 0)
6071 s->size += htab->plt_initial_entry_size;
6072
6073 /* The PowerPC PLT is actually composed of two
6074 parts, the first part is 2 words (for a load
6075 and a jump), and then there is a remaining
6076 word available at the end. */
6077 plt_offset = (htab->plt_initial_entry_size
6078 + (htab->plt_slot_size
6079 * ((s->size
6080 - htab->plt_initial_entry_size)
6081 / htab->plt_entry_size)));
6082
6083 /* If this symbol is not defined in a regular
6084 file, and we are not generating a shared
6085 library, then set the symbol to this location
6086 in the .plt. This is to avoid text
6087 relocations, and is required to make
6088 function pointers compare as equal between
6089 the normal executable and the shared library. */
6090 if (! bfd_link_pic (info)
6091 && h->def_dynamic
6092 && !h->def_regular)
6093 {
6094 h->root.u.def.section = s;
6095 h->root.u.def.value = plt_offset;
6096 }
6097
6098 /* Make room for this entry. */
6099 s->size += htab->plt_entry_size;
6100 /* After the 8192nd entry, room for two entries
6101 is allocated. */
6102 if (htab->plt_type == PLT_OLD
6103 && (s->size - htab->plt_initial_entry_size)
6104 / htab->plt_entry_size
6105 > PLT_NUM_SINGLE_ENTRIES)
6106 s->size += htab->plt_entry_size;
6107 }
6108 ent->plt.offset = plt_offset;
6109 }
6110
6111 /* We also need to make an entry in the .rela.plt section. */
6112 if (!doneone)
6113 {
6114 if (!dyn)
6115 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6116 else
6117 {
6118 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6119
6120 if (htab->plt_type == PLT_VXWORKS)
6121 {
6122 /* Allocate space for the unloaded relocations. */
6123 if (!bfd_link_pic (info)
6124 && htab->elf.dynamic_sections_created)
6125 {
6126 if (ent->plt.offset
6127 == (bfd_vma) htab->plt_initial_entry_size)
6128 {
6129 htab->srelplt2->size
6130 += (sizeof (Elf32_External_Rela)
6131 * VXWORKS_PLTRESOLVE_RELOCS);
6132 }
6133
6134 htab->srelplt2->size
6135 += (sizeof (Elf32_External_Rela)
6136 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6137 }
6138
6139 /* Every PLT entry has an associated GOT entry in
6140 .got.plt. */
6141 htab->elf.sgotplt->size += 4;
6142 }
6143 }
6144 doneone = TRUE;
6145 }
6146 }
6147 else
6148 ent->plt.offset = (bfd_vma) -1;
6149
6150 if (!doneone)
6151 {
6152 h->plt.plist = NULL;
6153 h->needs_plt = 0;
6154 }
6155 }
6156 else
6157 {
6158 h->plt.plist = NULL;
6159 h->needs_plt = 0;
6160 }
6161
6162 return TRUE;
6163 }
6164
6165 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6166 read-only sections. */
6167
6168 static bfd_boolean
6169 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6170 {
6171 asection *sec;
6172
6173 if (h->root.type == bfd_link_hash_indirect)
6174 return TRUE;
6175
6176 sec = readonly_dynrelocs (h);
6177 if (sec != NULL)
6178 {
6179 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
6180
6181 info->flags |= DF_TEXTREL;
6182 info->callbacks->minfo
6183 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
6184 sec->owner, h->root.root.string, sec);
6185
6186 /* Not an error, just cut short the traversal. */
6187 return FALSE;
6188 }
6189 return TRUE;
6190 }
6191
6192 static const unsigned char glink_eh_frame_cie[] =
6193 {
6194 0, 0, 0, 16, /* length. */
6195 0, 0, 0, 0, /* id. */
6196 1, /* CIE version. */
6197 'z', 'R', 0, /* Augmentation string. */
6198 4, /* Code alignment. */
6199 0x7c, /* Data alignment. */
6200 65, /* RA reg. */
6201 1, /* Augmentation size. */
6202 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6203 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6204 };
6205
6206 /* Set the sizes of the dynamic sections. */
6207
6208 static bfd_boolean
6209 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6210 struct bfd_link_info *info)
6211 {
6212 struct ppc_elf_link_hash_table *htab;
6213 asection *s;
6214 bfd_boolean relocs;
6215 bfd *ibfd;
6216
6217 #ifdef DEBUG
6218 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6219 #endif
6220
6221 htab = ppc_elf_hash_table (info);
6222 BFD_ASSERT (htab->elf.dynobj != NULL);
6223
6224 if (elf_hash_table (info)->dynamic_sections_created)
6225 {
6226 /* Set the contents of the .interp section to the interpreter. */
6227 if (bfd_link_executable (info) && !info->nointerp)
6228 {
6229 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6230 BFD_ASSERT (s != NULL);
6231 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6232 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6233 }
6234 }
6235
6236 if (htab->plt_type == PLT_OLD)
6237 htab->got_header_size = 16;
6238 else if (htab->plt_type == PLT_NEW)
6239 htab->got_header_size = 12;
6240
6241 /* Set up .got offsets for local syms, and space for local dynamic
6242 relocs. */
6243 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6244 {
6245 bfd_signed_vma *local_got;
6246 bfd_signed_vma *end_local_got;
6247 struct plt_entry **local_plt;
6248 struct plt_entry **end_local_plt;
6249 char *lgot_masks;
6250 bfd_size_type locsymcount;
6251 Elf_Internal_Shdr *symtab_hdr;
6252
6253 if (!is_ppc_elf (ibfd))
6254 continue;
6255
6256 for (s = ibfd->sections; s != NULL; s = s->next)
6257 {
6258 struct ppc_dyn_relocs *p;
6259
6260 for (p = ((struct ppc_dyn_relocs *)
6261 elf_section_data (s)->local_dynrel);
6262 p != NULL;
6263 p = p->next)
6264 {
6265 if (!bfd_is_abs_section (p->sec)
6266 && bfd_is_abs_section (p->sec->output_section))
6267 {
6268 /* Input section has been discarded, either because
6269 it is a copy of a linkonce section or due to
6270 linker script /DISCARD/, so we'll be discarding
6271 the relocs too. */
6272 }
6273 else if (htab->is_vxworks
6274 && strcmp (p->sec->output_section->name,
6275 ".tls_vars") == 0)
6276 {
6277 /* Relocations in vxworks .tls_vars sections are
6278 handled specially by the loader. */
6279 }
6280 else if (p->count != 0)
6281 {
6282 asection *sreloc = elf_section_data (p->sec)->sreloc;
6283 if (p->ifunc)
6284 sreloc = htab->elf.irelplt;
6285 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6286 if ((p->sec->output_section->flags
6287 & (SEC_READONLY | SEC_ALLOC))
6288 == (SEC_READONLY | SEC_ALLOC))
6289 {
6290 info->flags |= DF_TEXTREL;
6291 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
6292 p->sec->owner, p->sec);
6293 }
6294 }
6295 }
6296 }
6297
6298 local_got = elf_local_got_refcounts (ibfd);
6299 if (!local_got)
6300 continue;
6301
6302 symtab_hdr = &elf_symtab_hdr (ibfd);
6303 locsymcount = symtab_hdr->sh_info;
6304 end_local_got = local_got + locsymcount;
6305 local_plt = (struct plt_entry **) end_local_got;
6306 end_local_plt = local_plt + locsymcount;
6307 lgot_masks = (char *) end_local_plt;
6308
6309 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6310 if (*local_got > 0)
6311 {
6312 unsigned int need;
6313 if ((*lgot_masks & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
6314 htab->tlsld_got.refcount += 1;
6315 need = got_entries_needed (*lgot_masks);
6316 if (need == 0)
6317 *local_got = (bfd_vma) -1;
6318 else
6319 {
6320 *local_got = allocate_got (htab, need);
6321 if (bfd_link_pic (info))
6322 {
6323 asection *srel;
6324 bfd_boolean tprel_known = bfd_link_executable (info);
6325
6326 need = got_relocs_needed (*lgot_masks, need, tprel_known);
6327 srel = htab->elf.srelgot;
6328 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6329 srel = htab->elf.irelplt;
6330 srel->size += need;
6331 }
6332 }
6333 }
6334 else
6335 *local_got = (bfd_vma) -1;
6336
6337 if (htab->is_vxworks)
6338 continue;
6339
6340 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6341 for (; local_plt < end_local_plt; ++local_plt)
6342 {
6343 struct plt_entry *ent;
6344 bfd_boolean doneone = FALSE;
6345 bfd_vma plt_offset = 0, glink_offset = 0;
6346
6347 for (ent = *local_plt; ent != NULL; ent = ent->next)
6348 if (ent->plt.refcount > 0)
6349 {
6350 s = htab->elf.iplt;
6351
6352 if (!doneone)
6353 {
6354 plt_offset = s->size;
6355 s->size += 4;
6356 }
6357 ent->plt.offset = plt_offset;
6358
6359 s = htab->glink;
6360 if (!doneone || bfd_link_pic (info))
6361 {
6362 glink_offset = s->size;
6363 s->size += GLINK_ENTRY_SIZE (htab, NULL);
6364 }
6365 ent->glink_offset = glink_offset;
6366
6367 if (!doneone)
6368 {
6369 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6370 doneone = TRUE;
6371 }
6372 }
6373 else
6374 ent->plt.offset = (bfd_vma) -1;
6375 }
6376 }
6377
6378 /* Allocate space for global sym dynamic relocs. */
6379 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6380
6381 if (htab->tlsld_got.refcount > 0)
6382 {
6383 htab->tlsld_got.offset = allocate_got (htab, 8);
6384 if (bfd_link_pic (info))
6385 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6386 }
6387 else
6388 htab->tlsld_got.offset = (bfd_vma) -1;
6389
6390 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6391 {
6392 unsigned int g_o_t = 32768;
6393
6394 /* If we haven't allocated the header, do so now. When we get here,
6395 for old plt/got the got size will be 0 to 32764 (not allocated),
6396 or 32780 to 65536 (header allocated). For new plt/got, the
6397 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6398 if (htab->elf.sgot->size <= 32768)
6399 {
6400 g_o_t = htab->elf.sgot->size;
6401 if (htab->plt_type == PLT_OLD)
6402 g_o_t += 4;
6403 htab->elf.sgot->size += htab->got_header_size;
6404 }
6405
6406 htab->elf.hgot->root.u.def.value = g_o_t;
6407 }
6408 if (bfd_link_pic (info))
6409 {
6410 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6411
6412 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6413 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6414 }
6415 if (info->emitrelocations)
6416 {
6417 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6418
6419 if (sda != NULL && sda->ref_regular)
6420 sda->root.u.def.section->flags |= SEC_KEEP;
6421 sda = htab->sdata[1].sym;
6422 if (sda != NULL && sda->ref_regular)
6423 sda->root.u.def.section->flags |= SEC_KEEP;
6424 }
6425
6426 if (htab->glink != NULL
6427 && htab->glink->size != 0
6428 && htab->elf.dynamic_sections_created)
6429 {
6430 htab->glink_pltresolve = htab->glink->size;
6431 /* Space for the branch table. */
6432 htab->glink->size
6433 += htab->elf.srelplt->size / (sizeof (Elf32_External_Rela) / 4) - 4;
6434 /* Pad out to align the start of PLTresolve. */
6435 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6436 ? 63 : 15);
6437 htab->glink->size += GLINK_PLTRESOLVE;
6438
6439 if (htab->params->emit_stub_syms)
6440 {
6441 struct elf_link_hash_entry *sh;
6442 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6443 TRUE, FALSE, FALSE);
6444 if (sh == NULL)
6445 return FALSE;
6446 if (sh->root.type == bfd_link_hash_new)
6447 {
6448 sh->root.type = bfd_link_hash_defined;
6449 sh->root.u.def.section = htab->glink;
6450 sh->root.u.def.value = htab->glink_pltresolve;
6451 sh->ref_regular = 1;
6452 sh->def_regular = 1;
6453 sh->ref_regular_nonweak = 1;
6454 sh->forced_local = 1;
6455 sh->non_elf = 0;
6456 sh->root.linker_def = 1;
6457 }
6458 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6459 TRUE, FALSE, FALSE);
6460 if (sh == NULL)
6461 return FALSE;
6462 if (sh->root.type == bfd_link_hash_new)
6463 {
6464 sh->root.type = bfd_link_hash_defined;
6465 sh->root.u.def.section = htab->glink;
6466 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6467 sh->ref_regular = 1;
6468 sh->def_regular = 1;
6469 sh->ref_regular_nonweak = 1;
6470 sh->forced_local = 1;
6471 sh->non_elf = 0;
6472 sh->root.linker_def = 1;
6473 }
6474 }
6475 }
6476
6477 if (htab->glink != NULL
6478 && htab->glink->size != 0
6479 && htab->glink_eh_frame != NULL
6480 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6481 && _bfd_elf_eh_frame_present (info))
6482 {
6483 s = htab->glink_eh_frame;
6484 s->size = sizeof (glink_eh_frame_cie) + 20;
6485 if (bfd_link_pic (info))
6486 {
6487 s->size += 4;
6488 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6489 s->size += 4;
6490 }
6491 }
6492
6493 /* We've now determined the sizes of the various dynamic sections.
6494 Allocate memory for them. */
6495 relocs = FALSE;
6496 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6497 {
6498 bfd_boolean strip_section = TRUE;
6499
6500 if ((s->flags & SEC_LINKER_CREATED) == 0)
6501 continue;
6502
6503 if (s == htab->elf.splt
6504 || s == htab->elf.sgot)
6505 {
6506 /* We'd like to strip these sections if they aren't needed, but if
6507 we've exported dynamic symbols from them we must leave them.
6508 It's too late to tell BFD to get rid of the symbols. */
6509 if (htab->elf.hplt != NULL)
6510 strip_section = FALSE;
6511 /* Strip this section if we don't need it; see the
6512 comment below. */
6513 }
6514 else if (s == htab->elf.iplt
6515 || s == htab->glink
6516 || s == htab->glink_eh_frame
6517 || s == htab->elf.sgotplt
6518 || s == htab->sbss
6519 || s == htab->elf.sdynbss
6520 || s == htab->elf.sdynrelro
6521 || s == htab->dynsbss)
6522 {
6523 /* Strip these too. */
6524 }
6525 else if (s == htab->sdata[0].section
6526 || s == htab->sdata[1].section)
6527 {
6528 strip_section = (s->flags & SEC_KEEP) == 0;
6529 }
6530 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6531 ".rela"))
6532 {
6533 if (s->size != 0)
6534 {
6535 /* Remember whether there are any relocation sections. */
6536 relocs = TRUE;
6537
6538 /* We use the reloc_count field as a counter if we need
6539 to copy relocs into the output file. */
6540 s->reloc_count = 0;
6541 }
6542 }
6543 else
6544 {
6545 /* It's not one of our sections, so don't allocate space. */
6546 continue;
6547 }
6548
6549 if (s->size == 0 && strip_section)
6550 {
6551 /* If we don't need this section, strip it from the
6552 output file. This is mostly to handle .rela.bss and
6553 .rela.plt. We must create both sections in
6554 create_dynamic_sections, because they must be created
6555 before the linker maps input sections to output
6556 sections. The linker does that before
6557 adjust_dynamic_symbol is called, and it is that
6558 function which decides whether anything needs to go
6559 into these sections. */
6560 s->flags |= SEC_EXCLUDE;
6561 continue;
6562 }
6563
6564 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6565 continue;
6566
6567 /* Allocate memory for the section contents. */
6568 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6569 if (s->contents == NULL)
6570 return FALSE;
6571 }
6572
6573 if (htab->elf.dynamic_sections_created)
6574 {
6575 /* Add some entries to the .dynamic section. We fill in the
6576 values later, in ppc_elf_finish_dynamic_sections, but we
6577 must add the entries now so that we get the correct size for
6578 the .dynamic section. The DT_DEBUG entry is filled in by the
6579 dynamic linker and used by the debugger. */
6580 #define add_dynamic_entry(TAG, VAL) \
6581 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6582
6583 if (bfd_link_executable (info))
6584 {
6585 if (!add_dynamic_entry (DT_DEBUG, 0))
6586 return FALSE;
6587 }
6588
6589 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6590 {
6591 if (!add_dynamic_entry (DT_PLTGOT, 0)
6592 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6593 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6594 || !add_dynamic_entry (DT_JMPREL, 0))
6595 return FALSE;
6596 }
6597
6598 if (htab->plt_type == PLT_NEW
6599 && htab->glink != NULL
6600 && htab->glink->size != 0)
6601 {
6602 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6603 return FALSE;
6604 if (!htab->params->no_tls_get_addr_opt
6605 && htab->tls_get_addr != NULL
6606 && htab->tls_get_addr->plt.plist != NULL
6607 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6608 return FALSE;
6609 }
6610
6611 if (relocs)
6612 {
6613 if (!add_dynamic_entry (DT_RELA, 0)
6614 || !add_dynamic_entry (DT_RELASZ, 0)
6615 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6616 return FALSE;
6617 }
6618
6619 /* If any dynamic relocs apply to a read-only section, then we
6620 need a DT_TEXTREL entry. */
6621 if ((info->flags & DF_TEXTREL) == 0)
6622 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6623 info);
6624
6625 if ((info->flags & DF_TEXTREL) != 0)
6626 {
6627 if (!add_dynamic_entry (DT_TEXTREL, 0))
6628 return FALSE;
6629 }
6630 if (htab->is_vxworks
6631 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6632 return FALSE;
6633 }
6634 #undef add_dynamic_entry
6635
6636 if (htab->glink_eh_frame != NULL
6637 && htab->glink_eh_frame->contents != NULL)
6638 {
6639 unsigned char *p = htab->glink_eh_frame->contents;
6640 bfd_vma val;
6641
6642 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6643 /* CIE length (rewrite in case little-endian). */
6644 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6645 p += sizeof (glink_eh_frame_cie);
6646 /* FDE length. */
6647 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6648 bfd_put_32 (htab->elf.dynobj, val, p);
6649 p += 4;
6650 /* CIE pointer. */
6651 val = p - htab->glink_eh_frame->contents;
6652 bfd_put_32 (htab->elf.dynobj, val, p);
6653 p += 4;
6654 /* Offset to .glink. Set later. */
6655 p += 4;
6656 /* .glink size. */
6657 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6658 p += 4;
6659 /* Augmentation. */
6660 p += 1;
6661
6662 if (bfd_link_pic (info)
6663 && htab->elf.dynamic_sections_created)
6664 {
6665 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6666 if (adv < 64)
6667 *p++ = DW_CFA_advance_loc + adv;
6668 else if (adv < 256)
6669 {
6670 *p++ = DW_CFA_advance_loc1;
6671 *p++ = adv;
6672 }
6673 else if (adv < 65536)
6674 {
6675 *p++ = DW_CFA_advance_loc2;
6676 bfd_put_16 (htab->elf.dynobj, adv, p);
6677 p += 2;
6678 }
6679 else
6680 {
6681 *p++ = DW_CFA_advance_loc4;
6682 bfd_put_32 (htab->elf.dynobj, adv, p);
6683 p += 4;
6684 }
6685 *p++ = DW_CFA_register;
6686 *p++ = 65;
6687 p++;
6688 *p++ = DW_CFA_advance_loc + 4;
6689 *p++ = DW_CFA_restore_extended;
6690 *p++ = 65;
6691 }
6692 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6693 == htab->glink_eh_frame->size);
6694 }
6695
6696 return TRUE;
6697 }
6698
6699 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6700 if it looks like nothing is using them. */
6701
6702 static void
6703 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6704 {
6705 struct elf_link_hash_entry *sda = lsect->sym;
6706
6707 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6708 {
6709 asection *s;
6710
6711 s = bfd_get_section_by_name (output_bfd, lsect->name);
6712 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6713 {
6714 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6715 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6716 {
6717 sda->def_regular = 0;
6718 /* This is somewhat magic. See elf_link_output_extsym. */
6719 sda->ref_dynamic = 1;
6720 sda->forced_local = 0;
6721 }
6722 }
6723 }
6724 }
6725
6726 void
6727 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6728 {
6729 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6730
6731 if (htab != NULL)
6732 {
6733 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6734 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6735 }
6736 }
6737
6738
6739 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6740
6741 static bfd_boolean
6742 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6743 {
6744 if (h->plt.plist != NULL
6745 && !h->def_regular
6746 && (!h->pointer_equality_needed
6747 || !h->ref_regular_nonweak))
6748 return FALSE;
6749
6750 return _bfd_elf_hash_symbol (h);
6751 }
6752 \f
6753 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6754
6755 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6756 used for some functions that are allowed to break the ABI). */
6757 static const int shared_stub_entry[] =
6758 {
6759 0x7c0802a6, /* mflr 0 */
6760 0x429f0005, /* bcl 20, 31, .Lxxx */
6761 0x7d8802a6, /* mflr 12 */
6762 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6763 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6764 0x7c0803a6, /* mtlr 0 */
6765 0x7d8903a6, /* mtctr 12 */
6766 0x4e800420, /* bctr */
6767 };
6768
6769 static const int stub_entry[] =
6770 {
6771 0x3d800000, /* lis 12,xxx@ha */
6772 0x398c0000, /* addi 12,12,xxx@l */
6773 0x7d8903a6, /* mtctr 12 */
6774 0x4e800420, /* bctr */
6775 };
6776
6777 struct ppc_elf_relax_info
6778 {
6779 unsigned int workaround_size;
6780 unsigned int picfixup_size;
6781 };
6782
6783 /* This function implements long branch trampolines, and the ppc476
6784 icache bug workaround. Any section needing trampolines or patch
6785 space for the workaround has its size extended so that we can
6786 add trampolines at the end of the section. */
6787
6788 static bfd_boolean
6789 ppc_elf_relax_section (bfd *abfd,
6790 asection *isec,
6791 struct bfd_link_info *link_info,
6792 bfd_boolean *again)
6793 {
6794 struct one_branch_fixup
6795 {
6796 struct one_branch_fixup *next;
6797 asection *tsec;
6798 /* Final link, can use the symbol offset. For a
6799 relocatable link we use the symbol's index. */
6800 bfd_vma toff;
6801 bfd_vma trampoff;
6802 };
6803
6804 Elf_Internal_Shdr *symtab_hdr;
6805 bfd_byte *contents = NULL;
6806 Elf_Internal_Sym *isymbuf = NULL;
6807 Elf_Internal_Rela *internal_relocs = NULL;
6808 Elf_Internal_Rela *irel, *irelend = NULL;
6809 struct one_branch_fixup *branch_fixups = NULL;
6810 struct ppc_elf_relax_info *relax_info = NULL;
6811 unsigned changes = 0;
6812 bfd_boolean workaround_change;
6813 struct ppc_elf_link_hash_table *htab;
6814 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6815 asection *got2;
6816 bfd_boolean maybe_pasted;
6817
6818 *again = FALSE;
6819
6820 /* No need to do anything with non-alloc or non-code sections. */
6821 if ((isec->flags & SEC_ALLOC) == 0
6822 || (isec->flags & SEC_CODE) == 0
6823 || (isec->flags & SEC_LINKER_CREATED) != 0
6824 || isec->size < 4)
6825 return TRUE;
6826
6827 /* We cannot represent the required PIC relocs in the output, so don't
6828 do anything. The linker doesn't support mixing -shared and -r
6829 anyway. */
6830 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6831 return TRUE;
6832
6833 htab = ppc_elf_hash_table (link_info);
6834 if (htab == NULL)
6835 return TRUE;
6836
6837 isec->size = (isec->size + 3) & -4;
6838 if (isec->rawsize == 0)
6839 isec->rawsize = isec->size;
6840 trampbase = isec->size;
6841
6842 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6843 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6844 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6845
6846 if (htab->params->ppc476_workaround
6847 || htab->params->pic_fixup > 0)
6848 {
6849 if (elf_section_data (isec)->sec_info == NULL)
6850 {
6851 elf_section_data (isec)->sec_info
6852 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6853 if (elf_section_data (isec)->sec_info == NULL)
6854 return FALSE;
6855 }
6856 relax_info = elf_section_data (isec)->sec_info;
6857 trampbase -= relax_info->workaround_size;
6858 }
6859
6860 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6861 || strcmp (isec->output_section->name, ".fini") == 0);
6862 /* Space for a branch around any trampolines. */
6863 trampoff = trampbase;
6864 if (maybe_pasted && trampbase == isec->rawsize)
6865 trampoff += 4;
6866
6867 symtab_hdr = &elf_symtab_hdr (abfd);
6868 picfixup_size = 0;
6869 if (htab->params->branch_trampolines
6870 || htab->params->pic_fixup > 0)
6871 {
6872 /* Get a copy of the native relocations. */
6873 if (isec->reloc_count != 0)
6874 {
6875 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6876 link_info->keep_memory);
6877 if (internal_relocs == NULL)
6878 goto error_return;
6879 }
6880
6881 got2 = bfd_get_section_by_name (abfd, ".got2");
6882
6883 irelend = internal_relocs + isec->reloc_count;
6884 for (irel = internal_relocs; irel < irelend; irel++)
6885 {
6886 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6887 bfd_vma toff, roff;
6888 asection *tsec;
6889 struct one_branch_fixup *f;
6890 size_t insn_offset = 0;
6891 bfd_vma max_branch_offset = 0, val;
6892 bfd_byte *hit_addr;
6893 unsigned long t0;
6894 struct elf_link_hash_entry *h;
6895 struct plt_entry **plist;
6896 unsigned char sym_type;
6897
6898 switch (r_type)
6899 {
6900 case R_PPC_REL24:
6901 case R_PPC_LOCAL24PC:
6902 case R_PPC_PLTREL24:
6903 max_branch_offset = 1 << 25;
6904 break;
6905
6906 case R_PPC_REL14:
6907 case R_PPC_REL14_BRTAKEN:
6908 case R_PPC_REL14_BRNTAKEN:
6909 max_branch_offset = 1 << 15;
6910 break;
6911
6912 case R_PPC_ADDR16_HA:
6913 if (htab->params->pic_fixup > 0)
6914 break;
6915 continue;
6916
6917 default:
6918 continue;
6919 }
6920
6921 /* Get the value of the symbol referred to by the reloc. */
6922 h = NULL;
6923 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6924 {
6925 /* A local symbol. */
6926 Elf_Internal_Sym *isym;
6927
6928 /* Read this BFD's local symbols. */
6929 if (isymbuf == NULL)
6930 {
6931 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6932 if (isymbuf == NULL)
6933 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6934 symtab_hdr->sh_info, 0,
6935 NULL, NULL, NULL);
6936 if (isymbuf == 0)
6937 goto error_return;
6938 }
6939 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6940 if (isym->st_shndx == SHN_UNDEF)
6941 tsec = bfd_und_section_ptr;
6942 else if (isym->st_shndx == SHN_ABS)
6943 tsec = bfd_abs_section_ptr;
6944 else if (isym->st_shndx == SHN_COMMON)
6945 tsec = bfd_com_section_ptr;
6946 else
6947 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6948
6949 toff = isym->st_value;
6950 sym_type = ELF_ST_TYPE (isym->st_info);
6951 }
6952 else
6953 {
6954 /* Global symbol handling. */
6955 unsigned long indx;
6956
6957 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6958 h = elf_sym_hashes (abfd)[indx];
6959
6960 while (h->root.type == bfd_link_hash_indirect
6961 || h->root.type == bfd_link_hash_warning)
6962 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6963
6964 if (h->root.type == bfd_link_hash_defined
6965 || h->root.type == bfd_link_hash_defweak)
6966 {
6967 tsec = h->root.u.def.section;
6968 toff = h->root.u.def.value;
6969 }
6970 else if (h->root.type == bfd_link_hash_undefined
6971 || h->root.type == bfd_link_hash_undefweak)
6972 {
6973 tsec = bfd_und_section_ptr;
6974 toff = bfd_link_relocatable (link_info) ? indx : 0;
6975 }
6976 else
6977 continue;
6978
6979 /* If this branch is to __tls_get_addr then we may later
6980 optimise away the call. We won't be needing a long-
6981 branch stub in that case. */
6982 if (bfd_link_executable (link_info)
6983 && h == htab->tls_get_addr
6984 && irel != internal_relocs)
6985 {
6986 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6987 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6988 unsigned int tls_mask = 0;
6989
6990 /* The previous reloc should be one of R_PPC_TLSGD or
6991 R_PPC_TLSLD, or for older object files, a reloc
6992 on the __tls_get_addr arg setup insn. Get tls
6993 mask bits from the symbol on that reloc. */
6994 if (t_symndx < symtab_hdr->sh_info)
6995 {
6996 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6997
6998 if (local_got_offsets != NULL)
6999 {
7000 struct plt_entry **local_plt = (struct plt_entry **)
7001 (local_got_offsets + symtab_hdr->sh_info);
7002 char *lgot_masks = (char *)
7003 (local_plt + symtab_hdr->sh_info);
7004 tls_mask = lgot_masks[t_symndx];
7005 }
7006 }
7007 else
7008 {
7009 struct elf_link_hash_entry *th
7010 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7011
7012 while (th->root.type == bfd_link_hash_indirect
7013 || th->root.type == bfd_link_hash_warning)
7014 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7015
7016 tls_mask
7017 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7018 }
7019
7020 /* The mask bits tell us if the call will be
7021 optimised away. */
7022 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7023 && (t_rtype == R_PPC_TLSGD
7024 || t_rtype == R_PPC_GOT_TLSGD16
7025 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7026 continue;
7027 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7028 && (t_rtype == R_PPC_TLSLD
7029 || t_rtype == R_PPC_GOT_TLSLD16
7030 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7031 continue;
7032 }
7033
7034 sym_type = h->type;
7035 }
7036
7037 if (r_type == R_PPC_ADDR16_HA)
7038 {
7039 if (h != NULL
7040 && !h->def_regular
7041 && h->protected_def
7042 && ppc_elf_hash_entry (h)->has_addr16_ha
7043 && ppc_elf_hash_entry (h)->has_addr16_lo)
7044 picfixup_size += 12;
7045 continue;
7046 }
7047
7048 /* The condition here under which we call find_plt_ent must
7049 match that in relocate_section. If we call find_plt_ent here
7050 but not in relocate_section, or vice versa, then the branch
7051 destination used here may be incorrect. */
7052 plist = NULL;
7053 if (h != NULL)
7054 {
7055 /* We know is_branch_reloc (r_type) is true. */
7056 if (h->type == STT_GNU_IFUNC
7057 || r_type == R_PPC_PLTREL24)
7058 plist = &h->plt.plist;
7059 }
7060 else if (sym_type == STT_GNU_IFUNC
7061 && elf_local_got_offsets (abfd) != NULL)
7062 {
7063 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7064 struct plt_entry **local_plt = (struct plt_entry **)
7065 (local_got_offsets + symtab_hdr->sh_info);
7066 plist = local_plt + ELF32_R_SYM (irel->r_info);
7067 }
7068 if (plist != NULL)
7069 {
7070 bfd_vma addend = 0;
7071 struct plt_entry *ent;
7072
7073 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7074 addend = irel->r_addend;
7075 ent = find_plt_ent (plist, got2, addend);
7076 if (ent != NULL)
7077 {
7078 if (htab->plt_type == PLT_NEW
7079 || h == NULL
7080 || !htab->elf.dynamic_sections_created
7081 || h->dynindx == -1)
7082 {
7083 tsec = htab->glink;
7084 toff = ent->glink_offset;
7085 }
7086 else
7087 {
7088 tsec = htab->elf.splt;
7089 toff = ent->plt.offset;
7090 }
7091 }
7092 }
7093
7094 /* If the branch and target are in the same section, you have
7095 no hope of adding stubs. We'll error out later should the
7096 branch overflow. */
7097 if (tsec == isec)
7098 continue;
7099
7100 /* There probably isn't any reason to handle symbols in
7101 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7102 attribute for a code section, and we are only looking at
7103 branches. However, implement it correctly here as a
7104 reference for other target relax_section functions. */
7105 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7106 {
7107 /* At this stage in linking, no SEC_MERGE symbol has been
7108 adjusted, so all references to such symbols need to be
7109 passed through _bfd_merged_section_offset. (Later, in
7110 relocate_section, all SEC_MERGE symbols *except* for
7111 section symbols have been adjusted.)
7112
7113 gas may reduce relocations against symbols in SEC_MERGE
7114 sections to a relocation against the section symbol when
7115 the original addend was zero. When the reloc is against
7116 a section symbol we should include the addend in the
7117 offset passed to _bfd_merged_section_offset, since the
7118 location of interest is the original symbol. On the
7119 other hand, an access to "sym+addend" where "sym" is not
7120 a section symbol should not include the addend; Such an
7121 access is presumed to be an offset from "sym"; The
7122 location of interest is just "sym". */
7123 if (sym_type == STT_SECTION)
7124 toff += irel->r_addend;
7125
7126 toff
7127 = _bfd_merged_section_offset (abfd, &tsec,
7128 elf_section_data (tsec)->sec_info,
7129 toff);
7130
7131 if (sym_type != STT_SECTION)
7132 toff += irel->r_addend;
7133 }
7134 /* PLTREL24 addends are special. */
7135 else if (r_type != R_PPC_PLTREL24)
7136 toff += irel->r_addend;
7137
7138 /* Attempted -shared link of non-pic code loses. */
7139 if ((!bfd_link_relocatable (link_info)
7140 && tsec == bfd_und_section_ptr)
7141 || tsec->output_section == NULL
7142 || (tsec->owner != NULL
7143 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7144 continue;
7145
7146 roff = irel->r_offset;
7147
7148 /* If the branch is in range, no need to do anything. */
7149 if (tsec != bfd_und_section_ptr
7150 && (!bfd_link_relocatable (link_info)
7151 /* A relocatable link may have sections moved during
7152 final link, so do not presume they remain in range. */
7153 || tsec->output_section == isec->output_section))
7154 {
7155 bfd_vma symaddr, reladdr;
7156
7157 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7158 reladdr = isec->output_section->vma + isec->output_offset + roff;
7159 if (symaddr - reladdr + max_branch_offset
7160 < 2 * max_branch_offset)
7161 continue;
7162 }
7163
7164 /* Look for an existing fixup to this address. */
7165 for (f = branch_fixups; f ; f = f->next)
7166 if (f->tsec == tsec && f->toff == toff)
7167 break;
7168
7169 if (f == NULL)
7170 {
7171 size_t size;
7172 unsigned long stub_rtype;
7173
7174 val = trampoff - roff;
7175 if (val >= max_branch_offset)
7176 /* Oh dear, we can't reach a trampoline. Don't try to add
7177 one. We'll report an error later. */
7178 continue;
7179
7180 if (bfd_link_pic (link_info))
7181 {
7182 size = 4 * ARRAY_SIZE (shared_stub_entry);
7183 insn_offset = 12;
7184 }
7185 else
7186 {
7187 size = 4 * ARRAY_SIZE (stub_entry);
7188 insn_offset = 0;
7189 }
7190 stub_rtype = R_PPC_RELAX;
7191 if (tsec == htab->elf.splt
7192 || tsec == htab->glink)
7193 {
7194 stub_rtype = R_PPC_RELAX_PLT;
7195 if (r_type == R_PPC_PLTREL24)
7196 stub_rtype = R_PPC_RELAX_PLTREL24;
7197 }
7198
7199 /* Hijack the old relocation. Since we need two
7200 relocations for this use a "composite" reloc. */
7201 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7202 stub_rtype);
7203 irel->r_offset = trampoff + insn_offset;
7204 if (r_type == R_PPC_PLTREL24
7205 && stub_rtype != R_PPC_RELAX_PLTREL24)
7206 irel->r_addend = 0;
7207
7208 /* Record the fixup so we don't do it again this section. */
7209 f = bfd_malloc (sizeof (*f));
7210 f->next = branch_fixups;
7211 f->tsec = tsec;
7212 f->toff = toff;
7213 f->trampoff = trampoff;
7214 branch_fixups = f;
7215
7216 trampoff += size;
7217 changes++;
7218 }
7219 else
7220 {
7221 val = f->trampoff - roff;
7222 if (val >= max_branch_offset)
7223 continue;
7224
7225 /* Nop out the reloc, since we're finalizing things here. */
7226 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7227 }
7228
7229 /* Get the section contents. */
7230 if (contents == NULL)
7231 {
7232 /* Get cached copy if it exists. */
7233 if (elf_section_data (isec)->this_hdr.contents != NULL)
7234 contents = elf_section_data (isec)->this_hdr.contents;
7235 /* Go get them off disk. */
7236 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7237 goto error_return;
7238 }
7239
7240 /* Fix up the existing branch to hit the trampoline. */
7241 hit_addr = contents + roff;
7242 switch (r_type)
7243 {
7244 case R_PPC_REL24:
7245 case R_PPC_LOCAL24PC:
7246 case R_PPC_PLTREL24:
7247 t0 = bfd_get_32 (abfd, hit_addr);
7248 t0 &= ~0x3fffffc;
7249 t0 |= val & 0x3fffffc;
7250 bfd_put_32 (abfd, t0, hit_addr);
7251 break;
7252
7253 case R_PPC_REL14:
7254 case R_PPC_REL14_BRTAKEN:
7255 case R_PPC_REL14_BRNTAKEN:
7256 t0 = bfd_get_32 (abfd, hit_addr);
7257 t0 &= ~0xfffc;
7258 t0 |= val & 0xfffc;
7259 bfd_put_32 (abfd, t0, hit_addr);
7260 break;
7261 }
7262 }
7263
7264 while (branch_fixups != NULL)
7265 {
7266 struct one_branch_fixup *f = branch_fixups;
7267 branch_fixups = branch_fixups->next;
7268 free (f);
7269 }
7270 }
7271
7272 workaround_change = FALSE;
7273 newsize = trampoff;
7274 if (htab->params->ppc476_workaround
7275 && (!bfd_link_relocatable (link_info)
7276 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7277 {
7278 bfd_vma addr, end_addr;
7279 unsigned int crossings;
7280 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7281
7282 addr = isec->output_section->vma + isec->output_offset;
7283 end_addr = addr + trampoff;
7284 addr &= -pagesize;
7285 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7286 if (crossings != 0)
7287 {
7288 /* Keep space aligned, to ensure the patch code itself does
7289 not cross a page. Don't decrease size calculated on a
7290 previous pass as otherwise we might never settle on a layout. */
7291 newsize = 15 - ((end_addr - 1) & 15);
7292 newsize += crossings * 16;
7293 if (relax_info->workaround_size < newsize)
7294 {
7295 relax_info->workaround_size = newsize;
7296 workaround_change = TRUE;
7297 }
7298 /* Ensure relocate_section is called. */
7299 isec->flags |= SEC_RELOC;
7300 }
7301 newsize = trampoff + relax_info->workaround_size;
7302 }
7303
7304 if (htab->params->pic_fixup > 0)
7305 {
7306 picfixup_size -= relax_info->picfixup_size;
7307 if (picfixup_size != 0)
7308 relax_info->picfixup_size += picfixup_size;
7309 newsize += relax_info->picfixup_size;
7310 }
7311
7312 if (changes != 0 || picfixup_size != 0 || workaround_change)
7313 isec->size = newsize;
7314
7315 if (isymbuf != NULL
7316 && symtab_hdr->contents != (unsigned char *) isymbuf)
7317 {
7318 if (! link_info->keep_memory)
7319 free (isymbuf);
7320 else
7321 {
7322 /* Cache the symbols for elf_link_input_bfd. */
7323 symtab_hdr->contents = (unsigned char *) isymbuf;
7324 }
7325 }
7326
7327 if (contents != NULL
7328 && elf_section_data (isec)->this_hdr.contents != contents)
7329 {
7330 if (!changes && !link_info->keep_memory)
7331 free (contents);
7332 else
7333 {
7334 /* Cache the section contents for elf_link_input_bfd. */
7335 elf_section_data (isec)->this_hdr.contents = contents;
7336 }
7337 }
7338
7339 changes += picfixup_size;
7340 if (changes != 0)
7341 {
7342 /* Append sufficient NOP relocs so we can write out relocation
7343 information for the trampolines. */
7344 Elf_Internal_Shdr *rel_hdr;
7345 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7346 * sizeof (*new_relocs));
7347 unsigned ix;
7348
7349 if (!new_relocs)
7350 goto error_return;
7351 memcpy (new_relocs, internal_relocs,
7352 isec->reloc_count * sizeof (*new_relocs));
7353 for (ix = changes; ix--;)
7354 {
7355 irel = new_relocs + ix + isec->reloc_count;
7356
7357 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7358 }
7359 if (internal_relocs != elf_section_data (isec)->relocs)
7360 free (internal_relocs);
7361 elf_section_data (isec)->relocs = new_relocs;
7362 isec->reloc_count += changes;
7363 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7364 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7365 }
7366 else if (internal_relocs != NULL
7367 && elf_section_data (isec)->relocs != internal_relocs)
7368 free (internal_relocs);
7369
7370 *again = changes != 0 || workaround_change;
7371 return TRUE;
7372
7373 error_return:
7374 while (branch_fixups != NULL)
7375 {
7376 struct one_branch_fixup *f = branch_fixups;
7377 branch_fixups = branch_fixups->next;
7378 free (f);
7379 }
7380 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7381 free (isymbuf);
7382 if (contents != NULL
7383 && elf_section_data (isec)->this_hdr.contents != contents)
7384 free (contents);
7385 if (internal_relocs != NULL
7386 && elf_section_data (isec)->relocs != internal_relocs)
7387 free (internal_relocs);
7388 return FALSE;
7389 }
7390 \f
7391 /* What to do when ld finds relocations against symbols defined in
7392 discarded sections. */
7393
7394 static unsigned int
7395 ppc_elf_action_discarded (asection *sec)
7396 {
7397 if (strcmp (".fixup", sec->name) == 0)
7398 return 0;
7399
7400 if (strcmp (".got2", sec->name) == 0)
7401 return 0;
7402
7403 return _bfd_elf_default_action_discarded (sec);
7404 }
7405 \f
7406 /* Fill in the address for a pointer generated in a linker section. */
7407
7408 static bfd_vma
7409 elf_finish_pointer_linker_section (bfd *input_bfd,
7410 elf_linker_section_t *lsect,
7411 struct elf_link_hash_entry *h,
7412 bfd_vma relocation,
7413 const Elf_Internal_Rela *rel)
7414 {
7415 elf_linker_section_pointers_t *linker_section_ptr;
7416
7417 BFD_ASSERT (lsect != NULL);
7418
7419 if (h != NULL)
7420 {
7421 /* Handle global symbol. */
7422 struct ppc_elf_link_hash_entry *eh;
7423
7424 eh = (struct ppc_elf_link_hash_entry *) h;
7425 BFD_ASSERT (eh->elf.def_regular);
7426 linker_section_ptr = eh->linker_section_pointer;
7427 }
7428 else
7429 {
7430 /* Handle local symbol. */
7431 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7432
7433 BFD_ASSERT (is_ppc_elf (input_bfd));
7434 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7435 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7436 }
7437
7438 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7439 rel->r_addend,
7440 lsect);
7441 BFD_ASSERT (linker_section_ptr != NULL);
7442
7443 /* Offset will always be a multiple of four, so use the bottom bit
7444 as a "written" flag. */
7445 if ((linker_section_ptr->offset & 1) == 0)
7446 {
7447 bfd_put_32 (lsect->section->owner,
7448 relocation + linker_section_ptr->addend,
7449 lsect->section->contents + linker_section_ptr->offset);
7450 linker_section_ptr->offset += 1;
7451 }
7452
7453 relocation = (lsect->section->output_section->vma
7454 + lsect->section->output_offset
7455 + linker_section_ptr->offset - 1
7456 - SYM_VAL (lsect->sym));
7457
7458 #ifdef DEBUG
7459 fprintf (stderr,
7460 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7461 lsect->name, (long) relocation, (long) relocation);
7462 #endif
7463
7464 return relocation;
7465 }
7466
7467 #define PPC_LO(v) ((v) & 0xffff)
7468 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7469 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7470
7471 static void
7472 write_glink_stub (struct elf_link_hash_entry *h, struct plt_entry *ent,
7473 asection *plt_sec, unsigned char *p,
7474 struct bfd_link_info *info)
7475 {
7476 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7477 bfd *output_bfd = info->output_bfd;
7478 bfd_vma plt;
7479 unsigned char *end = p + GLINK_ENTRY_SIZE (htab, h);
7480
7481 if (h != NULL
7482 && h == htab->tls_get_addr
7483 && !htab->params->no_tls_get_addr_opt)
7484 {
7485 bfd_put_32 (output_bfd, LWZ_11_3, p);
7486 p += 4;
7487 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
7488 p += 4;
7489 bfd_put_32 (output_bfd, MR_0_3, p);
7490 p += 4;
7491 bfd_put_32 (output_bfd, CMPWI_11_0, p);
7492 p += 4;
7493 bfd_put_32 (output_bfd, ADD_3_12_2, p);
7494 p += 4;
7495 bfd_put_32 (output_bfd, BEQLR, p);
7496 p += 4;
7497 bfd_put_32 (output_bfd, MR_3_0, p);
7498 p += 4;
7499 bfd_put_32 (output_bfd, NOP, p);
7500 p += 4;
7501 }
7502
7503 plt = ((ent->plt.offset & ~1)
7504 + plt_sec->output_section->vma
7505 + plt_sec->output_offset);
7506
7507 if (bfd_link_pic (info))
7508 {
7509 bfd_vma got = 0;
7510
7511 if (ent->addend >= 32768)
7512 got = (ent->addend
7513 + ent->sec->output_section->vma
7514 + ent->sec->output_offset);
7515 else if (htab->elf.hgot != NULL)
7516 got = SYM_VAL (htab->elf.hgot);
7517
7518 plt -= got;
7519
7520 if (plt + 0x8000 < 0x10000)
7521 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7522 else
7523 {
7524 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7525 p += 4;
7526 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7527 }
7528 }
7529 else
7530 {
7531 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7532 p += 4;
7533 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7534 }
7535 p += 4;
7536 bfd_put_32 (output_bfd, MTCTR_11, p);
7537 p += 4;
7538 bfd_put_32 (output_bfd, BCTR, p);
7539 p += 4;
7540 while (p < end)
7541 {
7542 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7543 p += 4;
7544 }
7545 }
7546
7547 /* Return true if symbol is defined statically. */
7548
7549 static bfd_boolean
7550 is_static_defined (struct elf_link_hash_entry *h)
7551 {
7552 return ((h->root.type == bfd_link_hash_defined
7553 || h->root.type == bfd_link_hash_defweak)
7554 && h->root.u.def.section != NULL
7555 && h->root.u.def.section->output_section != NULL);
7556 }
7557
7558 /* If INSN is an opcode that may be used with an @tls operand, return
7559 the transformed insn for TLS optimisation, otherwise return 0. If
7560 REG is non-zero only match an insn with RB or RA equal to REG. */
7561
7562 unsigned int
7563 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7564 {
7565 unsigned int rtra;
7566
7567 if ((insn & (0x3f << 26)) != 31 << 26)
7568 return 0;
7569
7570 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7571 rtra = insn & ((1 << 26) - (1 << 16));
7572 else if (((insn >> 16) & 0x1f) == reg)
7573 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7574 else
7575 return 0;
7576
7577 if ((insn & (0x3ff << 1)) == 266 << 1)
7578 /* add -> addi. */
7579 insn = 14 << 26;
7580 else if ((insn & (0x1f << 1)) == 23 << 1
7581 && ((insn & (0x1f << 6)) < 14 << 6
7582 || ((insn & (0x1f << 6)) >= 16 << 6
7583 && (insn & (0x1f << 6)) < 24 << 6)))
7584 /* load and store indexed -> dform. */
7585 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7586 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7587 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7588 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7589 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7590 /* lwax -> lwa. */
7591 insn = (58 << 26) | 2;
7592 else
7593 return 0;
7594 insn |= rtra;
7595 return insn;
7596 }
7597
7598 /* If INSN is an opcode that may be used with an @tprel operand, return
7599 the transformed insn for an undefined weak symbol, ie. with the
7600 thread pointer REG operand removed. Otherwise return 0. */
7601
7602 unsigned int
7603 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7604 {
7605 if ((insn & (0x1f << 16)) == reg << 16
7606 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7607 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7608 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7609 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7610 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7611 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7612 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7613 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7614 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7615 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7616 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7617 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7618 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7619 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7620 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7621 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7622 && (insn & 3) != 1)
7623 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7624 && ((insn & 3) == 0 || (insn & 3) == 3))))
7625 {
7626 insn &= ~(0x1f << 16);
7627 }
7628 else if ((insn & (0x1f << 21)) == reg << 21
7629 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7630 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7631 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7632 {
7633 insn &= ~(0x1f << 21);
7634 insn |= (insn & (0x1f << 16)) << 5;
7635 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7636 insn -= 2 >> 26; /* convert to ori,oris */
7637 }
7638 else
7639 insn = 0;
7640 return insn;
7641 }
7642
7643 static bfd_boolean
7644 is_insn_ds_form (unsigned int insn)
7645 {
7646 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7647 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7648 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7649 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7650 }
7651
7652 static bfd_boolean
7653 is_insn_dq_form (unsigned int insn)
7654 {
7655 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7656 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7657 && (insn & 3) == 1));
7658 }
7659
7660 /* The RELOCATE_SECTION function is called by the ELF backend linker
7661 to handle the relocations for a section.
7662
7663 The relocs are always passed as Rela structures; if the section
7664 actually uses Rel structures, the r_addend field will always be
7665 zero.
7666
7667 This function is responsible for adjust the section contents as
7668 necessary, and (if using Rela relocs and generating a
7669 relocatable output file) adjusting the reloc addend as
7670 necessary.
7671
7672 This function does not have to worry about setting the reloc
7673 address or the reloc symbol index.
7674
7675 LOCAL_SYMS is a pointer to the swapped in local symbols.
7676
7677 LOCAL_SECTIONS is an array giving the section in the input file
7678 corresponding to the st_shndx field of each local symbol.
7679
7680 The global hash table entry for the global symbols can be found
7681 via elf_sym_hashes (input_bfd).
7682
7683 When generating relocatable output, this function must handle
7684 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7685 going to be the section symbol corresponding to the output
7686 section, which means that the addend must be adjusted
7687 accordingly. */
7688
7689 static bfd_boolean
7690 ppc_elf_relocate_section (bfd *output_bfd,
7691 struct bfd_link_info *info,
7692 bfd *input_bfd,
7693 asection *input_section,
7694 bfd_byte *contents,
7695 Elf_Internal_Rela *relocs,
7696 Elf_Internal_Sym *local_syms,
7697 asection **local_sections)
7698 {
7699 Elf_Internal_Shdr *symtab_hdr;
7700 struct elf_link_hash_entry **sym_hashes;
7701 struct ppc_elf_link_hash_table *htab;
7702 Elf_Internal_Rela *rel;
7703 Elf_Internal_Rela *wrel;
7704 Elf_Internal_Rela *relend;
7705 Elf_Internal_Rela outrel;
7706 asection *got2;
7707 bfd_vma *local_got_offsets;
7708 bfd_boolean ret = TRUE;
7709 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7710 bfd_boolean is_vxworks_tls;
7711 unsigned int picfixup_size = 0;
7712 struct ppc_elf_relax_info *relax_info = NULL;
7713
7714 #ifdef DEBUG
7715 _bfd_error_handler ("ppc_elf_relocate_section called for %pB section %pA, "
7716 "%ld relocations%s",
7717 input_bfd, input_section,
7718 (long) input_section->reloc_count,
7719 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7720 #endif
7721
7722 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7723
7724 /* Initialize howto table if not already done. */
7725 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7726 ppc_elf_howto_init ();
7727
7728 htab = ppc_elf_hash_table (info);
7729 local_got_offsets = elf_local_got_offsets (input_bfd);
7730 symtab_hdr = &elf_symtab_hdr (input_bfd);
7731 sym_hashes = elf_sym_hashes (input_bfd);
7732 /* We have to handle relocations in vxworks .tls_vars sections
7733 specially, because the dynamic loader is 'weird'. */
7734 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7735 && !strcmp (input_section->output_section->name,
7736 ".tls_vars"));
7737 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7738 relax_info = elf_section_data (input_section)->sec_info;
7739 rel = wrel = relocs;
7740 relend = relocs + input_section->reloc_count;
7741 for (; rel < relend; wrel++, rel++)
7742 {
7743 enum elf_ppc_reloc_type r_type;
7744 bfd_vma addend;
7745 bfd_reloc_status_type r;
7746 Elf_Internal_Sym *sym;
7747 asection *sec;
7748 struct elf_link_hash_entry *h;
7749 const char *sym_name;
7750 reloc_howto_type *howto;
7751 unsigned long r_symndx;
7752 bfd_vma relocation;
7753 bfd_vma branch_bit, from;
7754 bfd_boolean unresolved_reloc;
7755 bfd_boolean warned;
7756 unsigned int tls_type, tls_mask, tls_gd;
7757 struct plt_entry **ifunc, **plt_list;
7758 struct reloc_howto_struct alt_howto;
7759
7760 again:
7761 r_type = ELF32_R_TYPE (rel->r_info);
7762 sym = NULL;
7763 sec = NULL;
7764 h = NULL;
7765 unresolved_reloc = FALSE;
7766 warned = FALSE;
7767 r_symndx = ELF32_R_SYM (rel->r_info);
7768
7769 if (r_symndx < symtab_hdr->sh_info)
7770 {
7771 sym = local_syms + r_symndx;
7772 sec = local_sections[r_symndx];
7773 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7774
7775 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7776 }
7777 else
7778 {
7779 bfd_boolean ignored;
7780
7781 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7782 r_symndx, symtab_hdr, sym_hashes,
7783 h, sec, relocation,
7784 unresolved_reloc, warned, ignored);
7785
7786 sym_name = h->root.root.string;
7787 }
7788
7789 if (sec != NULL && discarded_section (sec))
7790 {
7791 /* For relocs against symbols from removed linkonce sections,
7792 or sections discarded by a linker script, we just want the
7793 section contents zeroed. Avoid any special processing. */
7794 howto = NULL;
7795 if (r_type < R_PPC_max)
7796 howto = ppc_elf_howto_table[r_type];
7797
7798 _bfd_clear_contents (howto, input_bfd, input_section,
7799 contents + rel->r_offset);
7800 wrel->r_offset = rel->r_offset;
7801 wrel->r_info = 0;
7802 wrel->r_addend = 0;
7803
7804 /* For ld -r, remove relocations in debug sections against
7805 symbols defined in discarded sections. Not done for
7806 non-debug to preserve relocs in .eh_frame which the
7807 eh_frame editing code expects to be present. */
7808 if (bfd_link_relocatable (info)
7809 && (input_section->flags & SEC_DEBUGGING))
7810 wrel--;
7811
7812 continue;
7813 }
7814
7815 if (bfd_link_relocatable (info))
7816 {
7817 if (got2 != NULL
7818 && r_type == R_PPC_PLTREL24
7819 && rel->r_addend != 0)
7820 {
7821 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7822 addend specifies the GOT pointer offset within .got2. */
7823 rel->r_addend += got2->output_offset;
7824 }
7825 if (r_type != R_PPC_RELAX_PLT
7826 && r_type != R_PPC_RELAX_PLTREL24
7827 && r_type != R_PPC_RELAX)
7828 goto copy_reloc;
7829 }
7830
7831 /* TLS optimizations. Replace instruction sequences and relocs
7832 based on information we collected in tls_optimize. We edit
7833 RELOCS so that --emit-relocs will output something sensible
7834 for the final instruction stream. */
7835 tls_mask = 0;
7836 tls_gd = 0;
7837 if (h != NULL)
7838 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7839 else if (local_got_offsets != NULL)
7840 {
7841 struct plt_entry **local_plt;
7842 char *lgot_masks;
7843 local_plt
7844 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7845 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7846 tls_mask = lgot_masks[r_symndx];
7847 }
7848
7849 /* Ensure reloc mapping code below stays sane. */
7850 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7851 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7852 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7853 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7854 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7855 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7856 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7857 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7858 abort ();
7859 switch (r_type)
7860 {
7861 default:
7862 break;
7863
7864 case R_PPC_GOT_TPREL16:
7865 case R_PPC_GOT_TPREL16_LO:
7866 if ((tls_mask & TLS_TLS) != 0
7867 && (tls_mask & TLS_TPREL) == 0)
7868 {
7869 bfd_vma insn;
7870
7871 insn = bfd_get_32 (input_bfd,
7872 contents + rel->r_offset - d_offset);
7873 insn &= 31 << 21;
7874 insn |= 0x3c020000; /* addis 0,2,0 */
7875 bfd_put_32 (input_bfd, insn,
7876 contents + rel->r_offset - d_offset);
7877 r_type = R_PPC_TPREL16_HA;
7878 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7879 }
7880 break;
7881
7882 case R_PPC_TLS:
7883 if ((tls_mask & TLS_TLS) != 0
7884 && (tls_mask & TLS_TPREL) == 0)
7885 {
7886 bfd_vma insn;
7887
7888 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7889 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7890 if (insn == 0)
7891 abort ();
7892 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7893 r_type = R_PPC_TPREL16_LO;
7894 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7895
7896 /* Was PPC_TLS which sits on insn boundary, now
7897 PPC_TPREL16_LO which is at low-order half-word. */
7898 rel->r_offset += d_offset;
7899 }
7900 break;
7901
7902 case R_PPC_GOT_TLSGD16_HI:
7903 case R_PPC_GOT_TLSGD16_HA:
7904 tls_gd = TLS_TPRELGD;
7905 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7906 goto tls_gdld_hi;
7907 break;
7908
7909 case R_PPC_GOT_TLSLD16_HI:
7910 case R_PPC_GOT_TLSLD16_HA:
7911 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7912 {
7913 tls_gdld_hi:
7914 if ((tls_mask & tls_gd) != 0)
7915 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7916 + R_PPC_GOT_TPREL16);
7917 else
7918 {
7919 rel->r_offset -= d_offset;
7920 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
7921 r_type = R_PPC_NONE;
7922 }
7923 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7924 }
7925 break;
7926
7927 case R_PPC_GOT_TLSGD16:
7928 case R_PPC_GOT_TLSGD16_LO:
7929 tls_gd = TLS_TPRELGD;
7930 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7931 goto tls_ldgd_opt;
7932 break;
7933
7934 case R_PPC_GOT_TLSLD16:
7935 case R_PPC_GOT_TLSLD16_LO:
7936 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7937 {
7938 unsigned int insn1, insn2;
7939 bfd_vma offset;
7940
7941 tls_ldgd_opt:
7942 offset = (bfd_vma) -1;
7943 /* If not using the newer R_PPC_TLSGD/LD to mark
7944 __tls_get_addr calls, we must trust that the call
7945 stays with its arg setup insns, ie. that the next
7946 reloc is the __tls_get_addr call associated with
7947 the current reloc. Edit both insns. */
7948 if (input_section->has_tls_get_addr_call
7949 && rel + 1 < relend
7950 && branch_reloc_hash_match (input_bfd, rel + 1,
7951 htab->tls_get_addr))
7952 offset = rel[1].r_offset;
7953 /* We read the low GOT_TLS insn because we need to keep
7954 the destination reg. It may be something other than
7955 the usual r3, and moved to r3 before the call by
7956 intervening code. */
7957 insn1 = bfd_get_32 (input_bfd,
7958 contents + rel->r_offset - d_offset);
7959 if ((tls_mask & tls_gd) != 0)
7960 {
7961 /* IE */
7962 insn1 &= (0x1f << 21) | (0x1f << 16);
7963 insn1 |= 32 << 26; /* lwz */
7964 if (offset != (bfd_vma) -1)
7965 {
7966 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7967 insn2 = 0x7c631214; /* add 3,3,2 */
7968 bfd_put_32 (input_bfd, insn2, contents + offset);
7969 }
7970 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7971 + R_PPC_GOT_TPREL16);
7972 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7973 }
7974 else
7975 {
7976 /* LE */
7977 insn1 &= 0x1f << 21;
7978 insn1 |= 0x3c020000; /* addis r,2,0 */
7979 if (tls_gd == 0)
7980 {
7981 /* Was an LD reloc. */
7982 for (r_symndx = 0;
7983 r_symndx < symtab_hdr->sh_info;
7984 r_symndx++)
7985 if (local_sections[r_symndx] == sec)
7986 break;
7987 if (r_symndx >= symtab_hdr->sh_info)
7988 r_symndx = STN_UNDEF;
7989 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7990 if (r_symndx != STN_UNDEF)
7991 rel->r_addend -= (local_syms[r_symndx].st_value
7992 + sec->output_offset
7993 + sec->output_section->vma);
7994 }
7995 r_type = R_PPC_TPREL16_HA;
7996 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7997 if (offset != (bfd_vma) -1)
7998 {
7999 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8000 rel[1].r_offset = offset + d_offset;
8001 rel[1].r_addend = rel->r_addend;
8002 insn2 = 0x38630000; /* addi 3,3,0 */
8003 bfd_put_32 (input_bfd, insn2, contents + offset);
8004 }
8005 }
8006 bfd_put_32 (input_bfd, insn1,
8007 contents + rel->r_offset - d_offset);
8008 if (tls_gd == 0)
8009 {
8010 /* We changed the symbol on an LD reloc. Start over
8011 in order to get h, sym, sec etc. right. */
8012 goto again;
8013 }
8014 }
8015 break;
8016
8017 case R_PPC_TLSGD:
8018 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
8019 && rel + 1 < relend)
8020 {
8021 unsigned int insn2;
8022 bfd_vma offset = rel->r_offset;
8023
8024 if ((tls_mask & TLS_TPRELGD) != 0)
8025 {
8026 /* IE */
8027 r_type = R_PPC_NONE;
8028 insn2 = 0x7c631214; /* add 3,3,2 */
8029 }
8030 else
8031 {
8032 /* LE */
8033 r_type = R_PPC_TPREL16_LO;
8034 rel->r_offset += d_offset;
8035 insn2 = 0x38630000; /* addi 3,3,0 */
8036 }
8037 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8038 bfd_put_32 (input_bfd, insn2, contents + offset);
8039 /* Zap the reloc on the _tls_get_addr call too. */
8040 BFD_ASSERT (offset == rel[1].r_offset);
8041 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8042 }
8043 break;
8044
8045 case R_PPC_TLSLD:
8046 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
8047 && rel + 1 < relend)
8048 {
8049 unsigned int insn2;
8050
8051 for (r_symndx = 0;
8052 r_symndx < symtab_hdr->sh_info;
8053 r_symndx++)
8054 if (local_sections[r_symndx] == sec)
8055 break;
8056 if (r_symndx >= symtab_hdr->sh_info)
8057 r_symndx = STN_UNDEF;
8058 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8059 if (r_symndx != STN_UNDEF)
8060 rel->r_addend -= (local_syms[r_symndx].st_value
8061 + sec->output_offset
8062 + sec->output_section->vma);
8063
8064 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8065 rel->r_offset += d_offset;
8066 insn2 = 0x38630000; /* addi 3,3,0 */
8067 bfd_put_32 (input_bfd, insn2,
8068 contents + rel->r_offset - d_offset);
8069 /* Zap the reloc on the _tls_get_addr call too. */
8070 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8071 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8072 goto again;
8073 }
8074 break;
8075 }
8076
8077 /* Handle other relocations that tweak non-addend part of insn. */
8078 branch_bit = 0;
8079 switch (r_type)
8080 {
8081 default:
8082 break;
8083
8084 /* Branch taken prediction relocations. */
8085 case R_PPC_ADDR14_BRTAKEN:
8086 case R_PPC_REL14_BRTAKEN:
8087 branch_bit = BRANCH_PREDICT_BIT;
8088 /* Fall through. */
8089
8090 /* Branch not taken prediction relocations. */
8091 case R_PPC_ADDR14_BRNTAKEN:
8092 case R_PPC_REL14_BRNTAKEN:
8093 {
8094 bfd_vma insn;
8095
8096 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8097 insn &= ~BRANCH_PREDICT_BIT;
8098 insn |= branch_bit;
8099
8100 from = (rel->r_offset
8101 + input_section->output_offset
8102 + input_section->output_section->vma);
8103
8104 /* Invert 'y' bit if not the default. */
8105 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8106 insn ^= BRANCH_PREDICT_BIT;
8107
8108 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8109 }
8110 break;
8111
8112 case R_PPC_PLT16_HA:
8113 {
8114 unsigned int insn;
8115
8116 insn = bfd_get_32 (input_bfd,
8117 contents + rel->r_offset - d_offset);
8118 if ((insn & (0x3f << 26)) == 15u << 26
8119 && (insn & (0x1f << 16)) != 0)
8120 {
8121 if (!bfd_link_pic (info))
8122 {
8123 /* Convert addis to lis. */
8124 insn &= ~(0x1f << 16);
8125 bfd_put_32 (input_bfd, insn,
8126 contents + rel->r_offset - d_offset);
8127 }
8128 }
8129 else if (bfd_link_pic (info))
8130 info->callbacks->einfo
8131 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8132 input_bfd, input_section, rel->r_offset,
8133 "R_PPC_PLT16_HA", insn);
8134 }
8135 break;
8136 }
8137
8138 if (ELIMINATE_COPY_RELOCS
8139 && h != NULL
8140 && !h->def_regular
8141 && h->protected_def
8142 && ppc_elf_hash_entry (h)->has_addr16_ha
8143 && ppc_elf_hash_entry (h)->has_addr16_lo
8144 && htab->params->pic_fixup > 0)
8145 {
8146 /* Convert lis;addi or lis;load/store accessing a protected
8147 variable defined in a shared library to PIC. */
8148 unsigned int insn;
8149
8150 if (r_type == R_PPC_ADDR16_HA)
8151 {
8152 insn = bfd_get_32 (input_bfd,
8153 contents + rel->r_offset - d_offset);
8154 if ((insn & (0x3f << 26)) == (15u << 26)
8155 && (insn & (0x1f << 16)) == 0 /* lis */)
8156 {
8157 bfd_byte *p;
8158 bfd_vma off;
8159 bfd_vma got_addr;
8160
8161 p = (contents + input_section->size
8162 - relax_info->workaround_size
8163 - relax_info->picfixup_size
8164 + picfixup_size);
8165 off = (p - contents) - (rel->r_offset - d_offset);
8166 if (off > 0x1fffffc || (off & 3) != 0)
8167 info->callbacks->einfo
8168 (_("%H: fixup branch overflow\n"),
8169 input_bfd, input_section, rel->r_offset);
8170
8171 bfd_put_32 (input_bfd, B | off,
8172 contents + rel->r_offset - d_offset);
8173 got_addr = (htab->elf.sgot->output_section->vma
8174 + htab->elf.sgot->output_offset
8175 + (h->got.offset & ~1));
8176 wrel->r_offset = (p - contents) + d_offset;
8177 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8178 wrel->r_addend = got_addr;
8179 insn &= ~0xffff;
8180 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8181 bfd_put_32 (input_bfd, insn, p);
8182
8183 /* Convert lis to lwz, loading address from GOT. */
8184 insn &= ~0xffff;
8185 insn ^= (32u ^ 15u) << 26;
8186 insn |= (insn & (0x1f << 21)) >> 5;
8187 insn |= got_addr & 0xffff;
8188 bfd_put_32 (input_bfd, insn, p + 4);
8189
8190 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8191 picfixup_size += 12;
8192
8193 /* Use one of the spare relocs, so --emit-relocs
8194 output is reasonable. */
8195 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8196 wrel++, rel++;
8197 rel->r_offset = wrel[-1].r_offset + 4;
8198 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8199 rel->r_addend = wrel[-1].r_addend;
8200
8201 /* Continue on as if we had a got reloc, to output
8202 dynamic reloc. */
8203 r_type = R_PPC_GOT16_LO;
8204 }
8205 else
8206 _bfd_error_handler
8207 /* xgettext:c-format */
8208 (_("%pB(%pA+%#" PRIx64 "): error: "
8209 "%s with unexpected instruction %#x"),
8210 input_bfd, input_section, (uint64_t) rel->r_offset,
8211 "R_PPC_ADDR16_HA", insn);
8212 }
8213 else if (r_type == R_PPC_ADDR16_LO)
8214 {
8215 insn = bfd_get_32 (input_bfd,
8216 contents + rel->r_offset - d_offset);
8217 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8218 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8219 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8220 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8221 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8222 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8223 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8224 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8225 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8226 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8227 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8228 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8229 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8230 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8231 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8232 && (insn & 3) != 1)
8233 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8234 && ((insn & 3) == 0 || (insn & 3) == 3)))
8235 {
8236 /* Arrange to apply the reloc addend, if any. */
8237 relocation = 0;
8238 unresolved_reloc = FALSE;
8239 rel->r_info = ELF32_R_INFO (0, r_type);
8240 }
8241 else
8242 _bfd_error_handler
8243 /* xgettext:c-format */
8244 (_("%pB(%pA+%#" PRIx64 "): error: "
8245 "%s with unexpected instruction %#x"),
8246 input_bfd, input_section, (uint64_t) rel->r_offset,
8247 "R_PPC_ADDR16_LO", insn);
8248 }
8249 }
8250
8251 ifunc = NULL;
8252 if (!htab->is_vxworks)
8253 {
8254 struct plt_entry *ent;
8255
8256 if (h != NULL)
8257 {
8258 if (h->type == STT_GNU_IFUNC)
8259 ifunc = &h->plt.plist;
8260 }
8261 else if (local_got_offsets != NULL
8262 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8263 {
8264 struct plt_entry **local_plt;
8265
8266 local_plt = (struct plt_entry **) (local_got_offsets
8267 + symtab_hdr->sh_info);
8268 ifunc = local_plt + r_symndx;
8269 }
8270
8271 ent = NULL;
8272 if (ifunc != NULL
8273 && (!bfd_link_pic (info)
8274 || is_branch_reloc (r_type)
8275 || r_type == R_PPC_PLT16_LO
8276 || r_type == R_PPC_PLT16_HI
8277 || r_type == R_PPC_PLT16_HA))
8278 {
8279 addend = 0;
8280 if (bfd_link_pic (info)
8281 && (r_type == R_PPC_PLTREL24
8282 || r_type == R_PPC_PLT16_LO
8283 || r_type == R_PPC_PLT16_HI
8284 || r_type == R_PPC_PLT16_HA))
8285 addend = rel->r_addend;
8286 ent = find_plt_ent (ifunc, got2, addend);
8287 }
8288 if (ent != NULL)
8289 {
8290 if (bfd_link_pic (info)
8291 && ent->sec != got2
8292 && htab->plt_type != PLT_NEW
8293 && (!htab->elf.dynamic_sections_created
8294 || h == NULL
8295 || h->dynindx == -1))
8296 {
8297 /* Uh oh, we are going to create a pic glink stub
8298 for an ifunc (here for h == NULL and later in
8299 finish_dynamic_symbol for h != NULL), and
8300 apparently are using code compiled with
8301 -mbss-plt. The difficulty is that -mbss-plt code
8302 gives no indication via a magic PLTREL24 addend
8303 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8304 is pointing into a .got2 section (and how far
8305 into .got2). */
8306 info->callbacks->einfo
8307 /* xgettext:c-format */
8308 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8309 input_bfd, input_section, rel->r_offset, sym_name);
8310 }
8311 if (h == NULL && (ent->plt.offset & 1) == 0)
8312 {
8313 Elf_Internal_Rela rela;
8314 bfd_byte *loc;
8315
8316 rela.r_offset = (htab->elf.iplt->output_section->vma
8317 + htab->elf.iplt->output_offset
8318 + ent->plt.offset);
8319 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8320 rela.r_addend = relocation;
8321 loc = htab->elf.irelplt->contents;
8322 loc += (htab->elf.irelplt->reloc_count++
8323 * sizeof (Elf32_External_Rela));
8324 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8325 htab->local_ifunc_resolver = 1;
8326
8327 ent->plt.offset |= 1;
8328 }
8329 if (h == NULL && (ent->glink_offset & 1) == 0)
8330 {
8331 unsigned char *p = ((unsigned char *) htab->glink->contents
8332 + ent->glink_offset);
8333
8334 write_glink_stub (NULL, ent, htab->elf.iplt, p, info);
8335 ent->glink_offset |= 1;
8336 }
8337
8338 unresolved_reloc = FALSE;
8339 if (htab->plt_type == PLT_NEW
8340 || !htab->elf.dynamic_sections_created
8341 || h == NULL
8342 || h->dynindx == -1)
8343 relocation = (htab->glink->output_section->vma
8344 + htab->glink->output_offset
8345 + (ent->glink_offset & ~1));
8346 else
8347 relocation = (htab->elf.splt->output_section->vma
8348 + htab->elf.splt->output_offset
8349 + ent->plt.offset);
8350 }
8351 }
8352
8353 addend = rel->r_addend;
8354 howto = NULL;
8355 if (r_type < R_PPC_max)
8356 howto = ppc_elf_howto_table[r_type];
8357
8358 switch (r_type)
8359 {
8360 default:
8361 break;
8362
8363 case R_PPC_TPREL16_HA:
8364 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8365 {
8366 bfd_byte *p = contents + (rel->r_offset & ~3);
8367 unsigned int insn = bfd_get_32 (input_bfd, p);
8368 if ((insn & ((0x3f << 26) | 0x1f << 16))
8369 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8370 /* xgettext:c-format */
8371 info->callbacks->minfo
8372 (_("%H: warning: %s unexpected insn %#x.\n"),
8373 input_bfd, input_section, rel->r_offset, howto->name, insn);
8374 else
8375 bfd_put_32 (input_bfd, NOP, p);
8376 }
8377 break;
8378
8379 case R_PPC_TPREL16_LO:
8380 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8381 {
8382 bfd_byte *p = contents + (rel->r_offset & ~3);
8383 unsigned int insn = bfd_get_32 (input_bfd, p);
8384 insn &= ~(0x1f << 16);
8385 insn |= 2 << 16;
8386 bfd_put_32 (input_bfd, insn, p);
8387 }
8388 break;
8389 }
8390
8391 tls_type = 0;
8392 switch (r_type)
8393 {
8394 default:
8395 /* xgettext:c-format */
8396 _bfd_error_handler (_("%pB: %s unsupported"),
8397 input_bfd, howto->name);
8398
8399 bfd_set_error (bfd_error_bad_value);
8400 ret = FALSE;
8401 goto copy_reloc;
8402
8403 case R_PPC_NONE:
8404 case R_PPC_TLS:
8405 case R_PPC_TLSGD:
8406 case R_PPC_TLSLD:
8407 case R_PPC_EMB_MRKREF:
8408 case R_PPC_GNU_VTINHERIT:
8409 case R_PPC_GNU_VTENTRY:
8410 goto copy_reloc;
8411
8412 /* GOT16 relocations. Like an ADDR16 using the symbol's
8413 address in the GOT as relocation value instead of the
8414 symbol's value itself. Also, create a GOT entry for the
8415 symbol and put the symbol value there. */
8416 case R_PPC_GOT_TLSGD16:
8417 case R_PPC_GOT_TLSGD16_LO:
8418 case R_PPC_GOT_TLSGD16_HI:
8419 case R_PPC_GOT_TLSGD16_HA:
8420 tls_type = TLS_TLS | TLS_GD;
8421 goto dogot;
8422
8423 case R_PPC_GOT_TLSLD16:
8424 case R_PPC_GOT_TLSLD16_LO:
8425 case R_PPC_GOT_TLSLD16_HI:
8426 case R_PPC_GOT_TLSLD16_HA:
8427 tls_type = TLS_TLS | TLS_LD;
8428 goto dogot;
8429
8430 case R_PPC_GOT_TPREL16:
8431 case R_PPC_GOT_TPREL16_LO:
8432 case R_PPC_GOT_TPREL16_HI:
8433 case R_PPC_GOT_TPREL16_HA:
8434 tls_type = TLS_TLS | TLS_TPREL;
8435 goto dogot;
8436
8437 case R_PPC_GOT_DTPREL16:
8438 case R_PPC_GOT_DTPREL16_LO:
8439 case R_PPC_GOT_DTPREL16_HI:
8440 case R_PPC_GOT_DTPREL16_HA:
8441 tls_type = TLS_TLS | TLS_DTPREL;
8442 goto dogot;
8443
8444 case R_PPC_GOT16:
8445 case R_PPC_GOT16_LO:
8446 case R_PPC_GOT16_HI:
8447 case R_PPC_GOT16_HA:
8448 tls_mask = 0;
8449 dogot:
8450 {
8451 /* Relocation is to the entry for this symbol in the global
8452 offset table. */
8453 bfd_vma off;
8454 bfd_vma *offp;
8455 unsigned long indx;
8456
8457 if (htab->elf.sgot == NULL)
8458 abort ();
8459
8460 indx = 0;
8461 if (tls_type == (TLS_TLS | TLS_LD)
8462 && (h == NULL
8463 || !h->def_dynamic))
8464 offp = &htab->tlsld_got.offset;
8465 else if (h != NULL)
8466 {
8467 if (!htab->elf.dynamic_sections_created
8468 || h->dynindx == -1
8469 || SYMBOL_REFERENCES_LOCAL (info, h)
8470 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8471 /* This is actually a static link, or it is a
8472 -Bsymbolic link and the symbol is defined
8473 locally, or the symbol was forced to be local
8474 because of a version file. */
8475 ;
8476 else
8477 {
8478 indx = h->dynindx;
8479 unresolved_reloc = FALSE;
8480 }
8481 offp = &h->got.offset;
8482 }
8483 else
8484 {
8485 if (local_got_offsets == NULL)
8486 abort ();
8487 offp = &local_got_offsets[r_symndx];
8488 }
8489
8490 /* The offset must always be a multiple of 4. We use the
8491 least significant bit to record whether we have already
8492 processed this entry. */
8493 off = *offp;
8494 if ((off & 1) != 0)
8495 off &= ~1;
8496 else
8497 {
8498 unsigned int tls_m = ((tls_mask & TLS_TLS) != 0
8499 ? tls_mask & (TLS_LD | TLS_GD | TLS_DTPREL
8500 | TLS_TPREL | TLS_TPRELGD)
8501 : 0);
8502
8503 if (offp == &htab->tlsld_got.offset)
8504 tls_m = TLS_LD;
8505 else if (h == NULL
8506 || !h->def_dynamic)
8507 tls_m &= ~TLS_LD;
8508
8509 /* We might have multiple got entries for this sym.
8510 Initialize them all. */
8511 do
8512 {
8513 int tls_ty = 0;
8514
8515 if ((tls_m & TLS_LD) != 0)
8516 {
8517 tls_ty = TLS_TLS | TLS_LD;
8518 tls_m &= ~TLS_LD;
8519 }
8520 else if ((tls_m & TLS_GD) != 0)
8521 {
8522 tls_ty = TLS_TLS | TLS_GD;
8523 tls_m &= ~TLS_GD;
8524 }
8525 else if ((tls_m & TLS_DTPREL) != 0)
8526 {
8527 tls_ty = TLS_TLS | TLS_DTPREL;
8528 tls_m &= ~TLS_DTPREL;
8529 }
8530 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8531 {
8532 tls_ty = TLS_TLS | TLS_TPREL;
8533 tls_m = 0;
8534 }
8535
8536 /* Generate relocs for the dynamic linker. */
8537 if (indx != 0
8538 || (bfd_link_pic (info)
8539 && (h == NULL
8540 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8541 || offp == &htab->tlsld_got.offset)
8542 && !(tls_ty == (TLS_TLS | TLS_TPREL)
8543 && bfd_link_executable (info)
8544 && SYMBOL_REFERENCES_LOCAL (info, h))))
8545 {
8546 asection *rsec = htab->elf.srelgot;
8547 bfd_byte * loc;
8548
8549 if (ifunc != NULL)
8550 {
8551 rsec = htab->elf.irelplt;
8552 if (indx == 0)
8553 htab->local_ifunc_resolver = 1;
8554 else if (is_static_defined (h))
8555 htab->maybe_local_ifunc_resolver = 1;
8556 }
8557 outrel.r_offset = (htab->elf.sgot->output_section->vma
8558 + htab->elf.sgot->output_offset
8559 + off);
8560 outrel.r_addend = 0;
8561 if (tls_ty & (TLS_LD | TLS_GD))
8562 {
8563 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8564 if (tls_ty == (TLS_TLS | TLS_GD))
8565 {
8566 loc = rsec->contents;
8567 loc += (rsec->reloc_count++
8568 * sizeof (Elf32_External_Rela));
8569 bfd_elf32_swap_reloca_out (output_bfd,
8570 &outrel, loc);
8571 outrel.r_offset += 4;
8572 outrel.r_info
8573 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8574 }
8575 }
8576 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8577 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8578 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8579 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8580 else if (indx != 0)
8581 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8582 else if (ifunc != NULL)
8583 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8584 else
8585 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8586 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8587 {
8588 outrel.r_addend += relocation;
8589 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8590 {
8591 if (htab->elf.tls_sec == NULL)
8592 outrel.r_addend = 0;
8593 else
8594 outrel.r_addend -= htab->elf.tls_sec->vma;
8595 }
8596 }
8597 loc = rsec->contents;
8598 loc += (rsec->reloc_count++
8599 * sizeof (Elf32_External_Rela));
8600 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8601 }
8602
8603 /* Init the .got section contents if we're not
8604 emitting a reloc. */
8605 else
8606 {
8607 bfd_vma value = relocation;
8608
8609 if (tls_ty != 0)
8610 {
8611 if (htab->elf.tls_sec == NULL)
8612 value = 0;
8613 else
8614 {
8615 if (tls_ty & TLS_LD)
8616 value = 0;
8617 else
8618 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8619 if (tls_ty & TLS_TPREL)
8620 value += DTP_OFFSET - TP_OFFSET;
8621 }
8622
8623 if (tls_ty & (TLS_LD | TLS_GD))
8624 {
8625 bfd_put_32 (input_bfd, value,
8626 htab->elf.sgot->contents + off + 4);
8627 value = 1;
8628 }
8629 }
8630 bfd_put_32 (input_bfd, value,
8631 htab->elf.sgot->contents + off);
8632 }
8633
8634 off += 4;
8635 if (tls_ty & (TLS_LD | TLS_GD))
8636 off += 4;
8637 }
8638 while (tls_m != 0);
8639
8640 off = *offp;
8641 *offp = off | 1;
8642 }
8643
8644 if (off >= (bfd_vma) -2)
8645 abort ();
8646
8647 if ((tls_type & TLS_TLS) != 0)
8648 {
8649 if (tls_type != (TLS_TLS | TLS_LD))
8650 {
8651 if ((tls_mask & TLS_LD) != 0
8652 && !(h == NULL
8653 || !h->def_dynamic))
8654 off += 8;
8655 if (tls_type != (TLS_TLS | TLS_GD))
8656 {
8657 if ((tls_mask & TLS_GD) != 0)
8658 off += 8;
8659 if (tls_type != (TLS_TLS | TLS_DTPREL))
8660 {
8661 if ((tls_mask & TLS_DTPREL) != 0)
8662 off += 4;
8663 }
8664 }
8665 }
8666 }
8667
8668 /* If here for a picfixup, we're done. */
8669 if (r_type != ELF32_R_TYPE (rel->r_info))
8670 goto copy_reloc;
8671
8672 relocation = (htab->elf.sgot->output_section->vma
8673 + htab->elf.sgot->output_offset
8674 + off
8675 - SYM_VAL (htab->elf.hgot));
8676
8677 /* Addends on got relocations don't make much sense.
8678 x+off@got is actually x@got+off, and since the got is
8679 generated by a hash table traversal, the value in the
8680 got at entry m+n bears little relation to the entry m. */
8681 if (addend != 0)
8682 info->callbacks->einfo
8683 /* xgettext:c-format */
8684 (_("%H: non-zero addend on %s reloc against `%s'\n"),
8685 input_bfd, input_section, rel->r_offset,
8686 howto->name,
8687 sym_name);
8688 }
8689 break;
8690
8691 /* Relocations that need no special processing. */
8692 case R_PPC_LOCAL24PC:
8693 /* It makes no sense to point a local relocation
8694 at a symbol not in this object. */
8695 if (unresolved_reloc)
8696 {
8697 (*info->callbacks->undefined_symbol) (info,
8698 h->root.root.string,
8699 input_bfd,
8700 input_section,
8701 rel->r_offset,
8702 TRUE);
8703 goto copy_reloc;
8704 }
8705 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8706 {
8707 /* @local on an ifunc does not really make sense since
8708 the ifunc resolver can take you anywhere. More
8709 seriously, calls to ifuncs must go through a plt call
8710 stub, and for pic the plt call stubs uses r30 to
8711 access the PLT. The problem is that a call that is
8712 local won't have the +32k reloc addend trick marking
8713 -fPIC code, so the linker won't know whether r30 is
8714 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8715 /* xgettext:c-format */
8716 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8717 input_bfd, input_section, rel->r_offset,
8718 h->root.root.string);
8719 }
8720 break;
8721
8722 case R_PPC_DTPREL16:
8723 case R_PPC_DTPREL16_LO:
8724 case R_PPC_DTPREL16_HI:
8725 case R_PPC_DTPREL16_HA:
8726 if (htab->elf.tls_sec != NULL)
8727 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8728 break;
8729
8730 /* Relocations that may need to be propagated if this is a shared
8731 object. */
8732 case R_PPC_TPREL16:
8733 case R_PPC_TPREL16_LO:
8734 case R_PPC_TPREL16_HI:
8735 case R_PPC_TPREL16_HA:
8736 if (h != NULL
8737 && h->root.type == bfd_link_hash_undefweak
8738 && h->dynindx == -1)
8739 {
8740 /* Make this relocation against an undefined weak symbol
8741 resolve to zero. This is really just a tweak, since
8742 code using weak externs ought to check that they are
8743 defined before using them. */
8744 bfd_byte *p = contents + rel->r_offset - d_offset;
8745 unsigned int insn = bfd_get_32 (input_bfd, p);
8746 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8747 if (insn != 0)
8748 bfd_put_32 (input_bfd, insn, p);
8749 break;
8750 }
8751 if (htab->elf.tls_sec != NULL)
8752 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8753 /* The TPREL16 relocs shouldn't really be used in shared
8754 libs or with non-local symbols as that will result in
8755 DT_TEXTREL being set, but support them anyway. */
8756 goto dodyn;
8757
8758 case R_PPC_TPREL32:
8759 if (htab->elf.tls_sec != NULL)
8760 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8761 goto dodyn;
8762
8763 case R_PPC_DTPREL32:
8764 if (htab->elf.tls_sec != NULL)
8765 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8766 goto dodyn;
8767
8768 case R_PPC_DTPMOD32:
8769 relocation = 1;
8770 addend = 0;
8771 goto dodyn;
8772
8773 case R_PPC_REL16:
8774 case R_PPC_REL16_LO:
8775 case R_PPC_REL16_HI:
8776 case R_PPC_REL16_HA:
8777 case R_PPC_REL16DX_HA:
8778 break;
8779
8780 case R_PPC_REL32:
8781 if (h == NULL || h == htab->elf.hgot)
8782 break;
8783 /* fall through */
8784
8785 case R_PPC_ADDR32:
8786 case R_PPC_ADDR16:
8787 case R_PPC_ADDR16_LO:
8788 case R_PPC_ADDR16_HI:
8789 case R_PPC_ADDR16_HA:
8790 case R_PPC_UADDR32:
8791 case R_PPC_UADDR16:
8792 goto dodyn;
8793
8794 case R_PPC_VLE_REL8:
8795 case R_PPC_VLE_REL15:
8796 case R_PPC_VLE_REL24:
8797 case R_PPC_REL24:
8798 case R_PPC_REL14:
8799 case R_PPC_REL14_BRTAKEN:
8800 case R_PPC_REL14_BRNTAKEN:
8801 /* If these relocations are not to a named symbol, they can be
8802 handled right here, no need to bother the dynamic linker. */
8803 if (SYMBOL_CALLS_LOCAL (info, h)
8804 || h == htab->elf.hgot)
8805 break;
8806 /* fall through */
8807
8808 case R_PPC_ADDR24:
8809 case R_PPC_ADDR14:
8810 case R_PPC_ADDR14_BRTAKEN:
8811 case R_PPC_ADDR14_BRNTAKEN:
8812 if (h != NULL && !bfd_link_pic (info))
8813 break;
8814 /* fall through */
8815
8816 dodyn:
8817 if ((input_section->flags & SEC_ALLOC) == 0
8818 || is_vxworks_tls)
8819 break;
8820
8821 if (bfd_link_pic (info)
8822 ? ((h == NULL
8823 || ppc_elf_hash_entry (h)->dyn_relocs != NULL)
8824 && ((h != NULL && pc_dynrelocs (h))
8825 || must_be_dyn_reloc (info, r_type)))
8826 : (h != NULL
8827 && ppc_elf_hash_entry (h)->dyn_relocs != NULL))
8828 {
8829 int skip;
8830 bfd_byte *loc;
8831 asection *sreloc;
8832 long indx = 0;
8833
8834 #ifdef DEBUG
8835 fprintf (stderr, "ppc_elf_relocate_section needs to "
8836 "create relocation for %s\n",
8837 (h && h->root.root.string
8838 ? h->root.root.string : "<unknown>"));
8839 #endif
8840
8841 /* When generating a shared object, these relocations
8842 are copied into the output file to be resolved at run
8843 time. */
8844 skip = 0;
8845 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8846 input_section,
8847 rel->r_offset);
8848 if (outrel.r_offset == (bfd_vma) -1
8849 || outrel.r_offset == (bfd_vma) -2)
8850 skip = (int) outrel.r_offset;
8851 outrel.r_offset += (input_section->output_section->vma
8852 + input_section->output_offset);
8853
8854 if (skip)
8855 memset (&outrel, 0, sizeof outrel);
8856 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
8857 {
8858 indx = h->dynindx;
8859 BFD_ASSERT (indx != -1);
8860 unresolved_reloc = FALSE;
8861 outrel.r_info = ELF32_R_INFO (indx, r_type);
8862 outrel.r_addend = rel->r_addend;
8863 }
8864 else
8865 {
8866 outrel.r_addend = relocation + rel->r_addend;
8867
8868 if (r_type != R_PPC_ADDR32)
8869 {
8870 if (ifunc != NULL)
8871 {
8872 /* If we get here when building a static
8873 executable, then the libc startup function
8874 responsible for applying indirect function
8875 relocations is going to complain about
8876 the reloc type.
8877 If we get here when building a dynamic
8878 executable, it will be because we have
8879 a text relocation. The dynamic loader
8880 will set the text segment writable and
8881 non-executable to apply text relocations.
8882 So we'll segfault when trying to run the
8883 indirection function to resolve the reloc. */
8884 info->callbacks->einfo
8885 /* xgettext:c-format */
8886 (_("%H: relocation %s for indirect "
8887 "function %s unsupported\n"),
8888 input_bfd, input_section, rel->r_offset,
8889 howto->name,
8890 sym_name);
8891 ret = FALSE;
8892 }
8893 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8894 ;
8895 else if (sec == NULL || sec->owner == NULL)
8896 {
8897 bfd_set_error (bfd_error_bad_value);
8898 ret = FALSE;
8899 }
8900 else
8901 {
8902 asection *osec;
8903
8904 /* We are turning this relocation into one
8905 against a section symbol. It would be
8906 proper to subtract the symbol's value,
8907 osec->vma, from the emitted reloc addend,
8908 but ld.so expects buggy relocs.
8909 FIXME: Why not always use a zero index? */
8910 osec = sec->output_section;
8911 indx = elf_section_data (osec)->dynindx;
8912 if (indx == 0)
8913 {
8914 osec = htab->elf.text_index_section;
8915 indx = elf_section_data (osec)->dynindx;
8916 }
8917 BFD_ASSERT (indx != 0);
8918 #ifdef DEBUG
8919 if (indx == 0)
8920 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8921 indx, osec->name, osec->flags,
8922 h->root.root.string);
8923 #endif
8924 }
8925
8926 outrel.r_info = ELF32_R_INFO (indx, r_type);
8927 }
8928 else if (ifunc != NULL)
8929 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8930 else
8931 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8932 }
8933
8934 sreloc = elf_section_data (input_section)->sreloc;
8935 if (ifunc)
8936 {
8937 sreloc = htab->elf.irelplt;
8938 if (indx == 0)
8939 htab->local_ifunc_resolver = 1;
8940 else if (is_static_defined (h))
8941 htab->maybe_local_ifunc_resolver = 1;
8942 }
8943 if (sreloc == NULL)
8944 return FALSE;
8945
8946 loc = sreloc->contents;
8947 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8948 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8949
8950 if (skip == -1)
8951 goto copy_reloc;
8952
8953 /* This reloc will be computed at runtime. Clear the memory
8954 so that it contains a predictable value for prelink. */
8955 if (!skip)
8956 {
8957 relocation = howto->pc_relative ? outrel.r_offset : 0;
8958 addend = 0;
8959 break;
8960 }
8961 }
8962 break;
8963
8964 case R_PPC_RELAX_PLT:
8965 case R_PPC_RELAX_PLTREL24:
8966 if (h != NULL)
8967 {
8968 struct plt_entry *ent;
8969 bfd_vma got2_addend = 0;
8970
8971 if (r_type == R_PPC_RELAX_PLTREL24)
8972 {
8973 if (bfd_link_pic (info))
8974 got2_addend = addend;
8975 addend = 0;
8976 }
8977 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8978 if (htab->plt_type == PLT_NEW)
8979 relocation = (htab->glink->output_section->vma
8980 + htab->glink->output_offset
8981 + ent->glink_offset);
8982 else
8983 relocation = (htab->elf.splt->output_section->vma
8984 + htab->elf.splt->output_offset
8985 + ent->plt.offset);
8986 }
8987 /* Fall through. */
8988
8989 case R_PPC_RELAX:
8990 {
8991 const int *stub;
8992 size_t size;
8993 size_t insn_offset = rel->r_offset;
8994 unsigned int insn;
8995
8996 if (bfd_link_pic (info))
8997 {
8998 relocation -= (input_section->output_section->vma
8999 + input_section->output_offset
9000 + rel->r_offset - 4);
9001 stub = shared_stub_entry;
9002 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9003 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9004 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9005 stub += 3;
9006 size = ARRAY_SIZE (shared_stub_entry) - 3;
9007 }
9008 else
9009 {
9010 stub = stub_entry;
9011 size = ARRAY_SIZE (stub_entry);
9012 }
9013
9014 relocation += addend;
9015 if (bfd_link_relocatable (info))
9016 relocation = 0;
9017
9018 /* First insn is HA, second is LO. */
9019 insn = *stub++;
9020 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9021 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9022 insn_offset += 4;
9023
9024 insn = *stub++;
9025 insn |= relocation & 0xffff;
9026 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9027 insn_offset += 4;
9028 size -= 2;
9029
9030 while (size != 0)
9031 {
9032 insn = *stub++;
9033 --size;
9034 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9035 insn_offset += 4;
9036 }
9037
9038 /* Rewrite the reloc and convert one of the trailing nop
9039 relocs to describe this relocation. */
9040 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9041 /* The relocs are at the bottom 2 bytes */
9042 wrel->r_offset = rel->r_offset + d_offset;
9043 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9044 wrel->r_addend = rel->r_addend;
9045 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9046 wrel++, rel++;
9047 wrel->r_offset += 4;
9048 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9049 }
9050 continue;
9051
9052 /* Indirect .sdata relocation. */
9053 case R_PPC_EMB_SDAI16:
9054 BFD_ASSERT (htab->sdata[0].section != NULL);
9055 if (!is_static_defined (htab->sdata[0].sym))
9056 {
9057 unresolved_reloc = TRUE;
9058 break;
9059 }
9060 relocation
9061 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9062 h, relocation, rel);
9063 addend = 0;
9064 break;
9065
9066 /* Indirect .sdata2 relocation. */
9067 case R_PPC_EMB_SDA2I16:
9068 BFD_ASSERT (htab->sdata[1].section != NULL);
9069 if (!is_static_defined (htab->sdata[1].sym))
9070 {
9071 unresolved_reloc = TRUE;
9072 break;
9073 }
9074 relocation
9075 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9076 h, relocation, rel);
9077 addend = 0;
9078 break;
9079
9080 /* Handle the TOC16 reloc. We want to use the offset within the .got
9081 section, not the actual VMA. This is appropriate when generating
9082 an embedded ELF object, for which the .got section acts like the
9083 AIX .toc section. */
9084 case R_PPC_TOC16: /* phony GOT16 relocations */
9085 if (sec == NULL || sec->output_section == NULL)
9086 {
9087 unresolved_reloc = TRUE;
9088 break;
9089 }
9090 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9091 ".got") == 0
9092 || strcmp (bfd_get_section_name (sec->owner, sec),
9093 ".cgot") == 0);
9094
9095 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9096 break;
9097
9098 case R_PPC_PLTREL24:
9099 if (h != NULL && ifunc == NULL)
9100 {
9101 struct plt_entry *ent;
9102
9103 ent = find_plt_ent (&h->plt.plist, got2,
9104 bfd_link_pic (info) ? addend : 0);
9105 if (ent == NULL
9106 || htab->elf.splt == NULL)
9107 {
9108 /* We didn't make a PLT entry for this symbol. This
9109 happens when statically linking PIC code, or when
9110 using -Bsymbolic. */
9111 }
9112 else
9113 {
9114 /* Relocation is to the entry for this symbol in the
9115 procedure linkage table. */
9116 unresolved_reloc = FALSE;
9117 if (htab->plt_type == PLT_NEW)
9118 relocation = (htab->glink->output_section->vma
9119 + htab->glink->output_offset
9120 + ent->glink_offset);
9121 else
9122 relocation = (htab->elf.splt->output_section->vma
9123 + htab->elf.splt->output_offset
9124 + ent->plt.offset);
9125 }
9126 }
9127
9128 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9129 addend specifies the GOT pointer offset within .got2.
9130 Don't apply it to the relocation field. */
9131 addend = 0;
9132 break;
9133
9134 case R_PPC_PLT16_LO:
9135 case R_PPC_PLT16_HI:
9136 case R_PPC_PLT16_HA:
9137 plt_list = ifunc;
9138 if (h != NULL)
9139 plt_list = &h->plt.plist;
9140 unresolved_reloc = TRUE;
9141 if (plt_list != NULL)
9142 {
9143 struct plt_entry *ent;
9144
9145 ent = find_plt_ent (plt_list, got2,
9146 bfd_link_pic (info) ? addend : 0);
9147 if (ent != NULL)
9148 {
9149 unresolved_reloc = FALSE;
9150 relocation = (htab->elf.splt->output_section->vma
9151 + htab->elf.splt->output_offset
9152 + ent->plt.offset);
9153 if (bfd_link_pic (info))
9154 {
9155 bfd_vma got = 0;
9156
9157 if (ent->addend >= 32768)
9158 got = (ent->addend
9159 + ent->sec->output_section->vma
9160 + ent->sec->output_offset);
9161 else
9162 got = SYM_VAL (htab->elf.hgot);
9163 relocation -= got;
9164 }
9165 }
9166 }
9167 addend = 0;
9168 break;
9169
9170 /* Relocate against _SDA_BASE_. */
9171 case R_PPC_SDAREL16:
9172 {
9173 const char *name;
9174 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9175
9176 if (sec == NULL
9177 || sec->output_section == NULL
9178 || !is_static_defined (sda))
9179 {
9180 unresolved_reloc = TRUE;
9181 break;
9182 }
9183 addend -= SYM_VAL (sda);
9184
9185 name = bfd_get_section_name (output_bfd, sec->output_section);
9186 if (!(strcmp (name, ".sdata") == 0
9187 || strcmp (name, ".sbss") == 0))
9188 {
9189 _bfd_error_handler
9190 /* xgettext:c-format */
9191 (_("%pB: the target (%s) of a %s relocation is "
9192 "in the wrong output section (%s)"),
9193 input_bfd,
9194 sym_name,
9195 howto->name,
9196 name);
9197 }
9198 }
9199 break;
9200
9201 /* Relocate against _SDA2_BASE_. */
9202 case R_PPC_EMB_SDA2REL:
9203 {
9204 const char *name;
9205 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9206
9207 if (sec == NULL
9208 || sec->output_section == NULL
9209 || !is_static_defined (sda))
9210 {
9211 unresolved_reloc = TRUE;
9212 break;
9213 }
9214 addend -= SYM_VAL (sda);
9215
9216 name = bfd_get_section_name (output_bfd, sec->output_section);
9217 if (!(strcmp (name, ".sdata2") == 0
9218 || strcmp (name, ".sbss2") == 0))
9219 {
9220 _bfd_error_handler
9221 /* xgettext:c-format */
9222 (_("%pB: the target (%s) of a %s relocation is "
9223 "in the wrong output section (%s)"),
9224 input_bfd,
9225 sym_name,
9226 howto->name,
9227 name);
9228 }
9229 }
9230 break;
9231
9232 case R_PPC_VLE_LO16A:
9233 relocation = relocation + addend;
9234 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9235 contents + rel->r_offset, relocation,
9236 split16a_type, htab->params->vle_reloc_fixup);
9237 goto copy_reloc;
9238
9239 case R_PPC_VLE_LO16D:
9240 relocation = relocation + addend;
9241 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9242 contents + rel->r_offset, relocation,
9243 split16d_type, htab->params->vle_reloc_fixup);
9244 goto copy_reloc;
9245
9246 case R_PPC_VLE_HI16A:
9247 relocation = (relocation + addend) >> 16;
9248 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9249 contents + rel->r_offset, relocation,
9250 split16a_type, htab->params->vle_reloc_fixup);
9251 goto copy_reloc;
9252
9253 case R_PPC_VLE_HI16D:
9254 relocation = (relocation + addend) >> 16;
9255 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9256 contents + rel->r_offset, relocation,
9257 split16d_type, htab->params->vle_reloc_fixup);
9258 goto copy_reloc;
9259
9260 case R_PPC_VLE_HA16A:
9261 relocation = (relocation + addend + 0x8000) >> 16;
9262 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9263 contents + rel->r_offset, relocation,
9264 split16a_type, htab->params->vle_reloc_fixup);
9265 goto copy_reloc;
9266
9267 case R_PPC_VLE_HA16D:
9268 relocation = (relocation + addend + 0x8000) >> 16;
9269 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9270 contents + rel->r_offset, relocation,
9271 split16d_type, htab->params->vle_reloc_fixup);
9272 goto copy_reloc;
9273
9274 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9275 case R_PPC_EMB_SDA21:
9276 case R_PPC_VLE_SDA21:
9277 case R_PPC_EMB_RELSDA:
9278 case R_PPC_VLE_SDA21_LO:
9279 {
9280 const char *name;
9281 int reg;
9282 unsigned int insn;
9283 struct elf_link_hash_entry *sda = NULL;
9284
9285 if (sec == NULL || sec->output_section == NULL)
9286 {
9287 unresolved_reloc = TRUE;
9288 break;
9289 }
9290
9291 name = bfd_get_section_name (output_bfd, sec->output_section);
9292 if (strcmp (name, ".sdata") == 0
9293 || strcmp (name, ".sbss") == 0)
9294 {
9295 reg = 13;
9296 sda = htab->sdata[0].sym;
9297 }
9298 else if (strcmp (name, ".sdata2") == 0
9299 || strcmp (name, ".sbss2") == 0)
9300 {
9301 reg = 2;
9302 sda = htab->sdata[1].sym;
9303 }
9304 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9305 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9306 {
9307 reg = 0;
9308 }
9309 else
9310 {
9311 _bfd_error_handler
9312 /* xgettext:c-format */
9313 (_("%pB: the target (%s) of a %s relocation is "
9314 "in the wrong output section (%s)"),
9315 input_bfd,
9316 sym_name,
9317 howto->name,
9318 name);
9319
9320 bfd_set_error (bfd_error_bad_value);
9321 ret = FALSE;
9322 goto copy_reloc;
9323 }
9324
9325 if (sda != NULL)
9326 {
9327 if (!is_static_defined (sda))
9328 {
9329 unresolved_reloc = TRUE;
9330 break;
9331 }
9332 addend -= SYM_VAL (sda);
9333 }
9334
9335 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9336 if (reg == 0
9337 && (r_type == R_PPC_VLE_SDA21
9338 || r_type == R_PPC_VLE_SDA21_LO))
9339 {
9340 relocation = relocation + addend;
9341 addend = 0;
9342
9343 /* Force e_li insn, keeping RT from original insn. */
9344 insn &= 0x1f << 21;
9345 insn |= 28u << 26;
9346
9347 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9348 /* Top 4 bits of value to 17..20. */
9349 insn |= (relocation & 0xf0000) >> 5;
9350 /* Next 5 bits of the value to 11..15. */
9351 insn |= (relocation & 0xf800) << 5;
9352 /* And the final 11 bits of the value to bits 21 to 31. */
9353 insn |= relocation & 0x7ff;
9354
9355 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9356
9357 if (r_type == R_PPC_VLE_SDA21
9358 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9359 goto overflow;
9360 goto copy_reloc;
9361 }
9362 else if (r_type == R_PPC_EMB_SDA21
9363 || r_type == R_PPC_VLE_SDA21
9364 || r_type == R_PPC_VLE_SDA21_LO)
9365 {
9366 /* Fill in register field. */
9367 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9368 }
9369 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9370 }
9371 break;
9372
9373 case R_PPC_VLE_SDAREL_LO16A:
9374 case R_PPC_VLE_SDAREL_LO16D:
9375 case R_PPC_VLE_SDAREL_HI16A:
9376 case R_PPC_VLE_SDAREL_HI16D:
9377 case R_PPC_VLE_SDAREL_HA16A:
9378 case R_PPC_VLE_SDAREL_HA16D:
9379 {
9380 bfd_vma value;
9381 const char *name;
9382 struct elf_link_hash_entry *sda = NULL;
9383
9384 if (sec == NULL || sec->output_section == NULL)
9385 {
9386 unresolved_reloc = TRUE;
9387 break;
9388 }
9389
9390 name = bfd_get_section_name (output_bfd, sec->output_section);
9391 if (strcmp (name, ".sdata") == 0
9392 || strcmp (name, ".sbss") == 0)
9393 sda = htab->sdata[0].sym;
9394 else if (strcmp (name, ".sdata2") == 0
9395 || strcmp (name, ".sbss2") == 0)
9396 sda = htab->sdata[1].sym;
9397 else
9398 {
9399 _bfd_error_handler
9400 /* xgettext:c-format */
9401 (_("%pB: the target (%s) of a %s relocation is "
9402 "in the wrong output section (%s)"),
9403 input_bfd,
9404 sym_name,
9405 howto->name,
9406 name);
9407
9408 bfd_set_error (bfd_error_bad_value);
9409 ret = FALSE;
9410 goto copy_reloc;
9411 }
9412
9413 if (sda == NULL || !is_static_defined (sda))
9414 {
9415 unresolved_reloc = TRUE;
9416 break;
9417 }
9418 value = relocation + addend - SYM_VAL (sda);
9419
9420 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9421 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9422 contents + rel->r_offset, value,
9423 split16a_type,
9424 htab->params->vle_reloc_fixup);
9425 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9426 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9427 contents + rel->r_offset, value,
9428 split16d_type,
9429 htab->params->vle_reloc_fixup);
9430 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9431 {
9432 value = value >> 16;
9433 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9434 contents + rel->r_offset, value,
9435 split16a_type,
9436 htab->params->vle_reloc_fixup);
9437 }
9438 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9439 {
9440 value = value >> 16;
9441 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9442 contents + rel->r_offset, value,
9443 split16d_type,
9444 htab->params->vle_reloc_fixup);
9445 }
9446 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9447 {
9448 value = (value + 0x8000) >> 16;
9449 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9450 contents + rel->r_offset, value,
9451 split16a_type,
9452 htab->params->vle_reloc_fixup);
9453 }
9454 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9455 {
9456 value = (value + 0x8000) >> 16;
9457 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9458 contents + rel->r_offset, value,
9459 split16d_type,
9460 htab->params->vle_reloc_fixup);
9461 }
9462 }
9463 goto copy_reloc;
9464
9465 case R_PPC_VLE_ADDR20:
9466 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9467 continue;
9468
9469 /* Relocate against the beginning of the section. */
9470 case R_PPC_SECTOFF:
9471 case R_PPC_SECTOFF_LO:
9472 case R_PPC_SECTOFF_HI:
9473 case R_PPC_SECTOFF_HA:
9474 if (sec == NULL || sec->output_section == NULL)
9475 {
9476 unresolved_reloc = TRUE;
9477 break;
9478 }
9479 addend -= sec->output_section->vma;
9480 break;
9481
9482 /* Negative relocations. */
9483 case R_PPC_EMB_NADDR32:
9484 case R_PPC_EMB_NADDR16:
9485 case R_PPC_EMB_NADDR16_LO:
9486 case R_PPC_EMB_NADDR16_HI:
9487 case R_PPC_EMB_NADDR16_HA:
9488 addend -= 2 * relocation;
9489 break;
9490
9491 case R_PPC_COPY:
9492 case R_PPC_GLOB_DAT:
9493 case R_PPC_JMP_SLOT:
9494 case R_PPC_RELATIVE:
9495 case R_PPC_IRELATIVE:
9496 case R_PPC_PLT32:
9497 case R_PPC_PLTREL32:
9498 case R_PPC_ADDR30:
9499 case R_PPC_EMB_RELSEC16:
9500 case R_PPC_EMB_RELST_LO:
9501 case R_PPC_EMB_RELST_HI:
9502 case R_PPC_EMB_RELST_HA:
9503 case R_PPC_EMB_BIT_FLD:
9504 /* xgettext:c-format */
9505 _bfd_error_handler (_("%pB: %s unsupported"),
9506 input_bfd, howto->name);
9507
9508 bfd_set_error (bfd_error_invalid_operation);
9509 ret = FALSE;
9510 goto copy_reloc;
9511 }
9512
9513 /* Do any further special processing. */
9514 switch (r_type)
9515 {
9516 default:
9517 break;
9518
9519 case R_PPC_ADDR16_HA:
9520 case R_PPC_REL16_HA:
9521 case R_PPC_REL16DX_HA:
9522 case R_PPC_SECTOFF_HA:
9523 case R_PPC_TPREL16_HA:
9524 case R_PPC_DTPREL16_HA:
9525 case R_PPC_EMB_NADDR16_HA:
9526 case R_PPC_EMB_RELST_HA:
9527 /* It's just possible that this symbol is a weak symbol
9528 that's not actually defined anywhere. In that case,
9529 'sec' would be NULL, and we should leave the symbol
9530 alone (it will be set to zero elsewhere in the link). */
9531 if (sec == NULL)
9532 break;
9533 /* Fall through. */
9534
9535 case R_PPC_PLT16_HA:
9536 case R_PPC_GOT16_HA:
9537 case R_PPC_GOT_TLSGD16_HA:
9538 case R_PPC_GOT_TLSLD16_HA:
9539 case R_PPC_GOT_TPREL16_HA:
9540 case R_PPC_GOT_DTPREL16_HA:
9541 /* Add 0x10000 if sign bit in 0:15 is set.
9542 Bits 0:15 are not used. */
9543 addend += 0x8000;
9544 break;
9545
9546 case R_PPC_ADDR16:
9547 case R_PPC_ADDR16_LO:
9548 case R_PPC_GOT16:
9549 case R_PPC_GOT16_LO:
9550 case R_PPC_SDAREL16:
9551 case R_PPC_SECTOFF:
9552 case R_PPC_SECTOFF_LO:
9553 case R_PPC_DTPREL16:
9554 case R_PPC_DTPREL16_LO:
9555 case R_PPC_TPREL16:
9556 case R_PPC_TPREL16_LO:
9557 case R_PPC_GOT_TLSGD16:
9558 case R_PPC_GOT_TLSGD16_LO:
9559 case R_PPC_GOT_TLSLD16:
9560 case R_PPC_GOT_TLSLD16_LO:
9561 case R_PPC_GOT_DTPREL16:
9562 case R_PPC_GOT_DTPREL16_LO:
9563 case R_PPC_GOT_TPREL16:
9564 case R_PPC_GOT_TPREL16_LO:
9565 {
9566 /* The 32-bit ABI lacks proper relocations to deal with
9567 certain 64-bit instructions. Prevent damage to bits
9568 that make up part of the insn opcode. */
9569 unsigned int insn, mask, lobit;
9570
9571 insn = bfd_get_32 (input_bfd,
9572 contents + rel->r_offset - d_offset);
9573 mask = 0;
9574 if (is_insn_ds_form (insn))
9575 mask = 3;
9576 else if (is_insn_dq_form (insn))
9577 mask = 15;
9578 else
9579 break;
9580 relocation += addend;
9581 addend = insn & mask;
9582 lobit = mask & relocation;
9583 if (lobit != 0)
9584 {
9585 relocation ^= lobit;
9586 info->callbacks->einfo
9587 /* xgettext:c-format */
9588 (_("%H: error: %s against `%s' not a multiple of %u\n"),
9589 input_bfd, input_section, rel->r_offset,
9590 howto->name, sym_name, mask + 1);
9591 bfd_set_error (bfd_error_bad_value);
9592 ret = FALSE;
9593 }
9594 }
9595 break;
9596 }
9597
9598 #ifdef DEBUG
9599 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9600 "offset = %ld, addend = %ld\n",
9601 howto->name,
9602 (int) r_type,
9603 sym_name,
9604 r_symndx,
9605 (long) rel->r_offset,
9606 (long) addend);
9607 #endif
9608
9609 if (unresolved_reloc
9610 && !((input_section->flags & SEC_DEBUGGING) != 0
9611 && h->def_dynamic)
9612 && _bfd_elf_section_offset (output_bfd, info, input_section,
9613 rel->r_offset) != (bfd_vma) -1)
9614 {
9615 info->callbacks->einfo
9616 /* xgettext:c-format */
9617 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
9618 input_bfd, input_section, rel->r_offset,
9619 howto->name,
9620 sym_name);
9621 ret = FALSE;
9622 }
9623
9624 /* 16-bit fields in insns mostly have signed values, but a
9625 few insns have 16-bit unsigned values. Really, we should
9626 have different reloc types. */
9627 if (howto->complain_on_overflow != complain_overflow_dont
9628 && howto->dst_mask == 0xffff
9629 && (input_section->flags & SEC_CODE) != 0)
9630 {
9631 enum complain_overflow complain = complain_overflow_signed;
9632
9633 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9634 {
9635 unsigned int insn;
9636
9637 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9638 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9639 complain = complain_overflow_bitfield;
9640 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9641 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9642 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9643 complain = complain_overflow_unsigned;
9644 }
9645 if (howto->complain_on_overflow != complain)
9646 {
9647 alt_howto = *howto;
9648 alt_howto.complain_on_overflow = complain;
9649 howto = &alt_howto;
9650 }
9651 }
9652
9653 if (r_type == R_PPC_REL16DX_HA)
9654 {
9655 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9656 if (rel->r_offset + 4 > input_section->size)
9657 r = bfd_reloc_outofrange;
9658 else
9659 {
9660 unsigned int insn;
9661
9662 relocation += addend;
9663 relocation -= (rel->r_offset
9664 + input_section->output_offset
9665 + input_section->output_section->vma);
9666 relocation >>= 16;
9667 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9668 insn &= ~0x1fffc1;
9669 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9670 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9671 r = bfd_reloc_ok;
9672 }
9673 }
9674 else
9675 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9676 rel->r_offset, relocation, addend);
9677
9678 if (r != bfd_reloc_ok)
9679 {
9680 if (r == bfd_reloc_overflow)
9681 {
9682 overflow:
9683 /* On code like "if (foo) foo();" don't report overflow
9684 on a branch to zero when foo is undefined. */
9685 if (!warned
9686 && !(h != NULL
9687 && (h->root.type == bfd_link_hash_undefweak
9688 || h->root.type == bfd_link_hash_undefined)
9689 && is_branch_reloc (r_type)))
9690 info->callbacks->reloc_overflow
9691 (info, (h ? &h->root : NULL), sym_name, howto->name,
9692 rel->r_addend, input_bfd, input_section, rel->r_offset);
9693 }
9694 else
9695 {
9696 info->callbacks->einfo
9697 /* xgettext:c-format */
9698 (_("%H: %s reloc against `%s': error %d\n"),
9699 input_bfd, input_section, rel->r_offset,
9700 howto->name, sym_name, (int) r);
9701 ret = FALSE;
9702 }
9703 }
9704 copy_reloc:
9705 if (wrel != rel)
9706 *wrel = *rel;
9707 }
9708
9709 if (wrel != rel)
9710 {
9711 Elf_Internal_Shdr *rel_hdr;
9712 size_t deleted = rel - wrel;
9713
9714 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9715 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9716 if (rel_hdr->sh_size == 0)
9717 {
9718 /* It is too late to remove an empty reloc section. Leave
9719 one NONE reloc.
9720 ??? What is wrong with an empty section??? */
9721 rel_hdr->sh_size = rel_hdr->sh_entsize;
9722 deleted -= 1;
9723 wrel++;
9724 }
9725 relend = wrel;
9726 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9727 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9728 input_section->reloc_count -= deleted;
9729 }
9730
9731 #ifdef DEBUG
9732 fprintf (stderr, "\n");
9733 #endif
9734
9735 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9736 && input_section->size != input_section->rawsize
9737 && (strcmp (input_section->output_section->name, ".init") == 0
9738 || strcmp (input_section->output_section->name, ".fini") == 0))
9739 {
9740 /* Branch around the trampolines. */
9741 unsigned int insn = B + input_section->size - input_section->rawsize;
9742 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9743 }
9744
9745 if (htab->params->ppc476_workaround
9746 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9747 && (!bfd_link_relocatable (info)
9748 || (input_section->output_section->alignment_power
9749 >= htab->params->pagesize_p2)))
9750 {
9751 bfd_vma start_addr, end_addr, addr;
9752 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9753
9754 if (relax_info->workaround_size != 0)
9755 {
9756 bfd_byte *p;
9757 unsigned int n;
9758 bfd_byte fill[4];
9759
9760 bfd_put_32 (input_bfd, BA, fill);
9761 p = contents + input_section->size - relax_info->workaround_size;
9762 n = relax_info->workaround_size >> 2;
9763 while (n--)
9764 {
9765 memcpy (p, fill, 4);
9766 p += 4;
9767 }
9768 }
9769
9770 /* The idea is: Replace the last instruction on a page with a
9771 branch to a patch area. Put the insn there followed by a
9772 branch back to the next page. Complicated a little by
9773 needing to handle moved conditional branches, and by not
9774 wanting to touch data-in-text. */
9775
9776 start_addr = (input_section->output_section->vma
9777 + input_section->output_offset);
9778 end_addr = (start_addr + input_section->size
9779 - relax_info->workaround_size);
9780 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9781 addr < end_addr;
9782 addr += pagesize)
9783 {
9784 bfd_vma offset = addr - start_addr;
9785 Elf_Internal_Rela *lo, *hi;
9786 bfd_boolean is_data;
9787 bfd_vma patch_off, patch_addr;
9788 unsigned int insn;
9789
9790 /* Do we have a data reloc at this offset? If so, leave
9791 the word alone. */
9792 is_data = FALSE;
9793 lo = relocs;
9794 hi = relend;
9795 rel = NULL;
9796 while (lo < hi)
9797 {
9798 rel = lo + (hi - lo) / 2;
9799 if (rel->r_offset < offset)
9800 lo = rel + 1;
9801 else if (rel->r_offset > offset + 3)
9802 hi = rel;
9803 else
9804 {
9805 switch (ELF32_R_TYPE (rel->r_info))
9806 {
9807 case R_PPC_ADDR32:
9808 case R_PPC_UADDR32:
9809 case R_PPC_REL32:
9810 case R_PPC_ADDR30:
9811 is_data = TRUE;
9812 break;
9813 default:
9814 break;
9815 }
9816 break;
9817 }
9818 }
9819 if (is_data)
9820 continue;
9821
9822 /* Some instructions can be left alone too. Unconditional
9823 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9824 avoid the icache failure.
9825
9826 The problem occurs due to prefetch across a page boundary
9827 where stale instructions can be fetched from the next
9828 page, and the mechanism for flushing these bad
9829 instructions fails under certain circumstances. The
9830 unconditional branches:
9831 1) Branch: b, bl, ba, bla,
9832 2) Branch Conditional: bc, bca, bcl, bcla,
9833 3) Branch Conditional to Link Register: bclr, bclrl,
9834 where (2) and (3) have BO=0x14 making them unconditional,
9835 prevent the bad prefetch because the prefetch itself is
9836 affected by these instructions. This happens even if the
9837 instruction is not executed.
9838
9839 A bctr example:
9840 .
9841 . lis 9,new_page@ha
9842 . addi 9,9,new_page@l
9843 . mtctr 9
9844 . bctr
9845 . nop
9846 . nop
9847 . new_page:
9848 .
9849 The bctr is not predicted taken due to ctr not being
9850 ready, so prefetch continues on past the bctr into the
9851 new page which might have stale instructions. If they
9852 fail to be flushed, then they will be executed after the
9853 bctr executes. Either of the following modifications
9854 prevent the bad prefetch from happening in the first
9855 place:
9856 .
9857 . lis 9,new_page@ha lis 9,new_page@ha
9858 . addi 9,9,new_page@l addi 9,9,new_page@l
9859 . mtctr 9 mtctr 9
9860 . bctr bctr
9861 . nop b somewhere_else
9862 . b somewhere_else nop
9863 . new_page: new_page:
9864 . */
9865 insn = bfd_get_32 (input_bfd, contents + offset);
9866 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9867 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9868 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9869 || ((insn & (0x3f << 26)) == (19u << 26)
9870 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9871 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9872 continue;
9873
9874 patch_addr = (start_addr + input_section->size
9875 - relax_info->workaround_size);
9876 patch_addr = (patch_addr + 15) & -16;
9877 patch_off = patch_addr - start_addr;
9878 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9879
9880 if (rel != NULL
9881 && rel->r_offset >= offset
9882 && rel->r_offset < offset + 4)
9883 {
9884 asection *sreloc;
9885
9886 /* If the insn we are patching had a reloc, adjust the
9887 reloc r_offset so that the reloc applies to the moved
9888 location. This matters for -r and --emit-relocs. */
9889 if (rel + 1 != relend)
9890 {
9891 Elf_Internal_Rela tmp = *rel;
9892
9893 /* Keep the relocs sorted by r_offset. */
9894 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9895 relend[-1] = tmp;
9896 }
9897 relend[-1].r_offset += patch_off - offset;
9898
9899 /* Adjust REL16 addends too. */
9900 switch (ELF32_R_TYPE (relend[-1].r_info))
9901 {
9902 case R_PPC_REL16:
9903 case R_PPC_REL16_LO:
9904 case R_PPC_REL16_HI:
9905 case R_PPC_REL16_HA:
9906 relend[-1].r_addend += patch_off - offset;
9907 break;
9908 default:
9909 break;
9910 }
9911
9912 /* If we are building a PIE or shared library with
9913 non-PIC objects, perhaps we had a dynamic reloc too?
9914 If so, the dynamic reloc must move with the insn. */
9915 sreloc = elf_section_data (input_section)->sreloc;
9916 if (sreloc != NULL)
9917 {
9918 Elf32_External_Rela *slo, *shi, *srelend;
9919 bfd_vma soffset;
9920
9921 slo = (Elf32_External_Rela *) sreloc->contents;
9922 shi = srelend = slo + sreloc->reloc_count;
9923 soffset = (offset + input_section->output_section->vma
9924 + input_section->output_offset);
9925 while (slo < shi)
9926 {
9927 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9928 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9929 &outrel);
9930 if (outrel.r_offset < soffset)
9931 slo = srel + 1;
9932 else if (outrel.r_offset > soffset + 3)
9933 shi = srel;
9934 else
9935 {
9936 if (srel + 1 != srelend)
9937 {
9938 memmove (srel, srel + 1,
9939 (srelend - (srel + 1)) * sizeof (*srel));
9940 srel = srelend - 1;
9941 }
9942 outrel.r_offset += patch_off - offset;
9943 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9944 (bfd_byte *) srel);
9945 break;
9946 }
9947 }
9948 }
9949 }
9950 else
9951 rel = NULL;
9952
9953 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9954 && (insn & 2) == 0 /* relative */)
9955 {
9956 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9957
9958 delta += offset - patch_off;
9959 if (bfd_link_relocatable (info) && rel != NULL)
9960 delta = 0;
9961 if (!bfd_link_relocatable (info) && rel != NULL)
9962 {
9963 enum elf_ppc_reloc_type r_type;
9964
9965 r_type = ELF32_R_TYPE (relend[-1].r_info);
9966 if (r_type == R_PPC_REL14_BRTAKEN)
9967 insn |= BRANCH_PREDICT_BIT;
9968 else if (r_type == R_PPC_REL14_BRNTAKEN)
9969 insn &= ~BRANCH_PREDICT_BIT;
9970 else
9971 BFD_ASSERT (r_type == R_PPC_REL14);
9972
9973 if ((r_type == R_PPC_REL14_BRTAKEN
9974 || r_type == R_PPC_REL14_BRNTAKEN)
9975 && delta + 0x8000 < 0x10000
9976 && (bfd_signed_vma) delta < 0)
9977 insn ^= BRANCH_PREDICT_BIT;
9978 }
9979 if (delta + 0x8000 < 0x10000)
9980 {
9981 bfd_put_32 (input_bfd,
9982 (insn & ~0xfffc) | (delta & 0xfffc),
9983 contents + patch_off);
9984 patch_off += 4;
9985 bfd_put_32 (input_bfd,
9986 B | ((offset + 4 - patch_off) & 0x3fffffc),
9987 contents + patch_off);
9988 patch_off += 4;
9989 }
9990 else
9991 {
9992 if (rel != NULL)
9993 {
9994 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9995
9996 relend[-1].r_offset += 8;
9997 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9998 }
9999 bfd_put_32 (input_bfd,
10000 (insn & ~0xfffc) | 8,
10001 contents + patch_off);
10002 patch_off += 4;
10003 bfd_put_32 (input_bfd,
10004 B | ((offset + 4 - patch_off) & 0x3fffffc),
10005 contents + patch_off);
10006 patch_off += 4;
10007 bfd_put_32 (input_bfd,
10008 B | ((delta - 8) & 0x3fffffc),
10009 contents + patch_off);
10010 patch_off += 4;
10011 }
10012 }
10013 else
10014 {
10015 bfd_put_32 (input_bfd, insn, contents + patch_off);
10016 patch_off += 4;
10017 bfd_put_32 (input_bfd,
10018 B | ((offset + 4 - patch_off) & 0x3fffffc),
10019 contents + patch_off);
10020 patch_off += 4;
10021 }
10022 BFD_ASSERT (patch_off <= input_section->size);
10023 relax_info->workaround_size = input_section->size - patch_off;
10024 }
10025 }
10026
10027 return ret;
10028 }
10029 \f
10030 /* Finish up dynamic symbol handling. We set the contents of various
10031 dynamic sections here. */
10032
10033 static bfd_boolean
10034 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10035 struct bfd_link_info *info,
10036 struct elf_link_hash_entry *h,
10037 Elf_Internal_Sym *sym)
10038 {
10039 struct ppc_elf_link_hash_table *htab;
10040 struct plt_entry *ent;
10041 bfd_boolean doneone;
10042
10043 #ifdef DEBUG
10044 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10045 h->root.root.string);
10046 #endif
10047
10048 htab = ppc_elf_hash_table (info);
10049 BFD_ASSERT (htab->elf.dynobj != NULL);
10050
10051 doneone = FALSE;
10052 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10053 if (ent->plt.offset != (bfd_vma) -1)
10054 {
10055 if (!doneone)
10056 {
10057 Elf_Internal_Rela rela;
10058 bfd_byte *loc;
10059 bfd_vma reloc_index;
10060
10061 if (htab->plt_type == PLT_NEW
10062 || !htab->elf.dynamic_sections_created
10063 || h->dynindx == -1)
10064 reloc_index = ent->plt.offset / 4;
10065 else
10066 {
10067 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10068 / htab->plt_slot_size);
10069 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10070 && htab->plt_type == PLT_OLD)
10071 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10072 }
10073
10074 /* This symbol has an entry in the procedure linkage table.
10075 Set it up. */
10076 if (htab->plt_type == PLT_VXWORKS
10077 && htab->elf.dynamic_sections_created
10078 && h->dynindx != -1)
10079 {
10080 bfd_vma got_offset;
10081 const bfd_vma *plt_entry;
10082
10083 /* The first three entries in .got.plt are reserved. */
10084 got_offset = (reloc_index + 3) * 4;
10085
10086 /* Use the right PLT. */
10087 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10088 : ppc_elf_vxworks_plt_entry;
10089
10090 /* Fill in the .plt on VxWorks. */
10091 if (bfd_link_pic (info))
10092 {
10093 bfd_put_32 (output_bfd,
10094 plt_entry[0] | PPC_HA (got_offset),
10095 htab->elf.splt->contents + ent->plt.offset + 0);
10096 bfd_put_32 (output_bfd,
10097 plt_entry[1] | PPC_LO (got_offset),
10098 htab->elf.splt->contents + ent->plt.offset + 4);
10099 }
10100 else
10101 {
10102 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10103
10104 bfd_put_32 (output_bfd,
10105 plt_entry[0] | PPC_HA (got_loc),
10106 htab->elf.splt->contents + ent->plt.offset + 0);
10107 bfd_put_32 (output_bfd,
10108 plt_entry[1] | PPC_LO (got_loc),
10109 htab->elf.splt->contents + ent->plt.offset + 4);
10110 }
10111
10112 bfd_put_32 (output_bfd, plt_entry[2],
10113 htab->elf.splt->contents + ent->plt.offset + 8);
10114 bfd_put_32 (output_bfd, plt_entry[3],
10115 htab->elf.splt->contents + ent->plt.offset + 12);
10116
10117 /* This instruction is an immediate load. The value loaded is
10118 the byte offset of the R_PPC_JMP_SLOT relocation from the
10119 start of the .rela.plt section. The value is stored in the
10120 low-order 16 bits of the load instruction. */
10121 /* NOTE: It appears that this is now an index rather than a
10122 prescaled offset. */
10123 bfd_put_32 (output_bfd,
10124 plt_entry[4] | reloc_index,
10125 htab->elf.splt->contents + ent->plt.offset + 16);
10126 /* This instruction is a PC-relative branch whose target is
10127 the start of the PLT section. The address of this branch
10128 instruction is 20 bytes beyond the start of this PLT entry.
10129 The address is encoded in bits 6-29, inclusive. The value
10130 stored is right-shifted by two bits, permitting a 26-bit
10131 offset. */
10132 bfd_put_32 (output_bfd,
10133 (plt_entry[5]
10134 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10135 htab->elf.splt->contents + ent->plt.offset + 20);
10136 bfd_put_32 (output_bfd, plt_entry[6],
10137 htab->elf.splt->contents + ent->plt.offset + 24);
10138 bfd_put_32 (output_bfd, plt_entry[7],
10139 htab->elf.splt->contents + ent->plt.offset + 28);
10140
10141 /* Fill in the GOT entry corresponding to this PLT slot with
10142 the address immediately after the "bctr" instruction
10143 in this PLT entry. */
10144 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10145 + htab->elf.splt->output_offset
10146 + ent->plt.offset + 16),
10147 htab->elf.sgotplt->contents + got_offset);
10148
10149 if (!bfd_link_pic (info))
10150 {
10151 /* Fill in a couple of entries in .rela.plt.unloaded. */
10152 loc = htab->srelplt2->contents
10153 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10154 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10155 * sizeof (Elf32_External_Rela));
10156
10157 /* Provide the @ha relocation for the first instruction. */
10158 rela.r_offset = (htab->elf.splt->output_section->vma
10159 + htab->elf.splt->output_offset
10160 + ent->plt.offset + 2);
10161 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10162 R_PPC_ADDR16_HA);
10163 rela.r_addend = got_offset;
10164 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10165 loc += sizeof (Elf32_External_Rela);
10166
10167 /* Provide the @l relocation for the second instruction. */
10168 rela.r_offset = (htab->elf.splt->output_section->vma
10169 + htab->elf.splt->output_offset
10170 + ent->plt.offset + 6);
10171 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10172 R_PPC_ADDR16_LO);
10173 rela.r_addend = got_offset;
10174 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10175 loc += sizeof (Elf32_External_Rela);
10176
10177 /* Provide a relocation for the GOT entry corresponding to this
10178 PLT slot. Point it at the middle of the .plt entry. */
10179 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10180 + htab->elf.sgotplt->output_offset
10181 + got_offset);
10182 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10183 R_PPC_ADDR32);
10184 rela.r_addend = ent->plt.offset + 16;
10185 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10186 }
10187
10188 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10189 In particular, the offset for the relocation is not the
10190 address of the PLT entry for this function, as specified
10191 by the ABI. Instead, the offset is set to the address of
10192 the GOT slot for this function. See EABI 4.4.4.1. */
10193 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10194 + htab->elf.sgotplt->output_offset
10195 + got_offset);
10196
10197 }
10198 else
10199 {
10200 asection *splt = htab->elf.splt;
10201 if (!htab->elf.dynamic_sections_created
10202 || h->dynindx == -1)
10203 splt = htab->elf.iplt;
10204
10205 rela.r_offset = (splt->output_section->vma
10206 + splt->output_offset
10207 + ent->plt.offset);
10208 if (htab->plt_type == PLT_OLD
10209 || !htab->elf.dynamic_sections_created
10210 || h->dynindx == -1)
10211 {
10212 /* We don't need to fill in the .plt. The ppc dynamic
10213 linker will fill it in. */
10214 }
10215 else
10216 {
10217 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10218 + htab->glink->output_section->vma
10219 + htab->glink->output_offset);
10220 bfd_put_32 (output_bfd, val,
10221 splt->contents + ent->plt.offset);
10222 }
10223 }
10224
10225 /* Fill in the entry in the .rela.plt section. */
10226 rela.r_addend = 0;
10227 if (!htab->elf.dynamic_sections_created
10228 || h->dynindx == -1)
10229 {
10230 BFD_ASSERT (h->type == STT_GNU_IFUNC
10231 && h->def_regular
10232 && (h->root.type == bfd_link_hash_defined
10233 || h->root.type == bfd_link_hash_defweak));
10234 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10235 rela.r_addend = SYM_VAL (h);
10236 }
10237 else
10238 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10239
10240 if (!htab->elf.dynamic_sections_created
10241 || h->dynindx == -1)
10242 {
10243 loc = (htab->elf.irelplt->contents
10244 + (htab->elf.irelplt->reloc_count++
10245 * sizeof (Elf32_External_Rela)));
10246 htab->local_ifunc_resolver = 1;
10247 }
10248 else
10249 {
10250 loc = (htab->elf.srelplt->contents
10251 + reloc_index * sizeof (Elf32_External_Rela));
10252 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10253 htab->maybe_local_ifunc_resolver = 1;
10254 }
10255 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10256
10257 if (!h->def_regular)
10258 {
10259 /* Mark the symbol as undefined, rather than as
10260 defined in the .plt section. Leave the value if
10261 there were any relocations where pointer equality
10262 matters (this is a clue for the dynamic linker, to
10263 make function pointer comparisons work between an
10264 application and shared library), otherwise set it
10265 to zero. */
10266 sym->st_shndx = SHN_UNDEF;
10267 if (!h->pointer_equality_needed)
10268 sym->st_value = 0;
10269 else if (!h->ref_regular_nonweak)
10270 {
10271 /* This breaks function pointer comparisons, but
10272 that is better than breaking tests for a NULL
10273 function pointer. */
10274 sym->st_value = 0;
10275 }
10276 }
10277 else if (h->type == STT_GNU_IFUNC
10278 && !bfd_link_pic (info))
10279 {
10280 /* Set the value of ifunc symbols in a non-pie
10281 executable to the glink entry. This is to avoid
10282 text relocations. We can't do this for ifunc in
10283 allocate_dynrelocs, as we do for normal dynamic
10284 function symbols with plt entries, because we need
10285 to keep the original value around for the ifunc
10286 relocation. */
10287 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10288 (output_bfd, htab->glink->output_section));
10289 sym->st_value = (ent->glink_offset
10290 + htab->glink->output_offset
10291 + htab->glink->output_section->vma);
10292 }
10293 doneone = TRUE;
10294 }
10295
10296 if (htab->plt_type == PLT_NEW
10297 || !htab->elf.dynamic_sections_created
10298 || h->dynindx == -1)
10299 {
10300 unsigned char *p;
10301 asection *splt = htab->elf.splt;
10302
10303 if (!htab->elf.dynamic_sections_created
10304 || h->dynindx == -1)
10305 splt = htab->elf.iplt;
10306
10307 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10308 write_glink_stub (h, ent, splt, p, info);
10309
10310 if (!bfd_link_pic (info))
10311 /* We only need one non-PIC glink stub. */
10312 break;
10313 }
10314 else
10315 break;
10316 }
10317
10318 if (h->needs_copy)
10319 {
10320 asection *s;
10321 Elf_Internal_Rela rela;
10322 bfd_byte *loc;
10323
10324 /* This symbols needs a copy reloc. Set it up. */
10325
10326 #ifdef DEBUG
10327 fprintf (stderr, ", copy");
10328 #endif
10329
10330 BFD_ASSERT (h->dynindx != -1);
10331
10332 if (ppc_elf_hash_entry (h)->has_sda_refs)
10333 s = htab->relsbss;
10334 else if (h->root.u.def.section == htab->elf.sdynrelro)
10335 s = htab->elf.sreldynrelro;
10336 else
10337 s = htab->elf.srelbss;
10338 BFD_ASSERT (s != NULL);
10339
10340 rela.r_offset = SYM_VAL (h);
10341 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10342 rela.r_addend = 0;
10343 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10344 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10345 }
10346
10347 #ifdef DEBUG
10348 fprintf (stderr, "\n");
10349 #endif
10350
10351 return TRUE;
10352 }
10353 \f
10354 static enum elf_reloc_type_class
10355 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10356 const asection *rel_sec,
10357 const Elf_Internal_Rela *rela)
10358 {
10359 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10360
10361 if (rel_sec == htab->elf.irelplt)
10362 return reloc_class_ifunc;
10363
10364 switch (ELF32_R_TYPE (rela->r_info))
10365 {
10366 case R_PPC_RELATIVE:
10367 return reloc_class_relative;
10368 case R_PPC_JMP_SLOT:
10369 return reloc_class_plt;
10370 case R_PPC_COPY:
10371 return reloc_class_copy;
10372 default:
10373 return reloc_class_normal;
10374 }
10375 }
10376 \f
10377 /* Finish up the dynamic sections. */
10378
10379 static bfd_boolean
10380 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10381 struct bfd_link_info *info)
10382 {
10383 asection *sdyn;
10384 struct ppc_elf_link_hash_table *htab;
10385 bfd_vma got;
10386 bfd *dynobj;
10387 bfd_boolean ret = TRUE;
10388
10389 #ifdef DEBUG
10390 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10391 #endif
10392
10393 htab = ppc_elf_hash_table (info);
10394 dynobj = htab->elf.dynobj;
10395 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10396
10397 got = 0;
10398 if (htab->elf.hgot != NULL)
10399 got = SYM_VAL (htab->elf.hgot);
10400
10401 if (htab->elf.dynamic_sections_created)
10402 {
10403 Elf32_External_Dyn *dyncon, *dynconend;
10404
10405 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10406
10407 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10408 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10409 for (; dyncon < dynconend; dyncon++)
10410 {
10411 Elf_Internal_Dyn dyn;
10412 asection *s;
10413
10414 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10415
10416 switch (dyn.d_tag)
10417 {
10418 case DT_PLTGOT:
10419 if (htab->is_vxworks)
10420 s = htab->elf.sgotplt;
10421 else
10422 s = htab->elf.splt;
10423 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10424 break;
10425
10426 case DT_PLTRELSZ:
10427 dyn.d_un.d_val = htab->elf.srelplt->size;
10428 break;
10429
10430 case DT_JMPREL:
10431 s = htab->elf.srelplt;
10432 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10433 break;
10434
10435 case DT_PPC_GOT:
10436 dyn.d_un.d_ptr = got;
10437 break;
10438
10439 case DT_TEXTREL:
10440 if (htab->local_ifunc_resolver)
10441 info->callbacks->einfo
10442 (_("%X%P: text relocations and GNU indirect "
10443 "functions will result in a segfault at runtime\n"));
10444 else if (htab->maybe_local_ifunc_resolver)
10445 info->callbacks->einfo
10446 (_("%P: warning: text relocations and GNU indirect "
10447 "functions may result in a segfault at runtime\n"));
10448 continue;
10449
10450 default:
10451 if (htab->is_vxworks
10452 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10453 break;
10454 continue;
10455 }
10456
10457 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10458 }
10459 }
10460
10461 if (htab->elf.sgot != NULL
10462 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
10463 {
10464 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10465 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10466 {
10467 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10468
10469 p += htab->elf.hgot->root.u.def.value;
10470 if (htab->plt_type == PLT_OLD)
10471 {
10472 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10473 so that a function can easily find the address of
10474 _GLOBAL_OFFSET_TABLE_. */
10475 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10476 < htab->elf.hgot->root.u.def.section->size);
10477 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10478 }
10479
10480 if (sdyn != NULL)
10481 {
10482 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10483 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10484 < htab->elf.hgot->root.u.def.section->size);
10485 bfd_put_32 (output_bfd, val, p);
10486 }
10487 }
10488 else
10489 {
10490 /* xgettext:c-format */
10491 _bfd_error_handler (_("%s not defined in linker created %pA"),
10492 htab->elf.hgot->root.root.string,
10493 (htab->elf.sgotplt != NULL
10494 ? htab->elf.sgotplt : htab->elf.sgot));
10495 bfd_set_error (bfd_error_bad_value);
10496 ret = FALSE;
10497 }
10498
10499 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10500 }
10501
10502 /* Fill in the first entry in the VxWorks procedure linkage table. */
10503 if (htab->is_vxworks
10504 && htab->elf.splt != NULL
10505 && htab->elf.splt->size != 0
10506 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10507 {
10508 asection *splt = htab->elf.splt;
10509 /* Use the right PLT. */
10510 const bfd_vma *plt_entry = (bfd_link_pic (info)
10511 ? ppc_elf_vxworks_pic_plt0_entry
10512 : ppc_elf_vxworks_plt0_entry);
10513
10514 if (!bfd_link_pic (info))
10515 {
10516 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10517
10518 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10519 splt->contents + 0);
10520 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10521 splt->contents + 4);
10522 }
10523 else
10524 {
10525 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10526 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10527 }
10528 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10529 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10530 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10531 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10532 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10533 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10534
10535 if (! bfd_link_pic (info))
10536 {
10537 Elf_Internal_Rela rela;
10538 bfd_byte *loc;
10539
10540 loc = htab->srelplt2->contents;
10541
10542 /* Output the @ha relocation for the first instruction. */
10543 rela.r_offset = (htab->elf.splt->output_section->vma
10544 + htab->elf.splt->output_offset
10545 + 2);
10546 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10547 rela.r_addend = 0;
10548 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10549 loc += sizeof (Elf32_External_Rela);
10550
10551 /* Output the @l relocation for the second instruction. */
10552 rela.r_offset = (htab->elf.splt->output_section->vma
10553 + htab->elf.splt->output_offset
10554 + 6);
10555 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10556 rela.r_addend = 0;
10557 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10558 loc += sizeof (Elf32_External_Rela);
10559
10560 /* Fix up the remaining relocations. They may have the wrong
10561 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10562 in which symbols were output. */
10563 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10564 {
10565 Elf_Internal_Rela rel;
10566
10567 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10568 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10569 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10570 loc += sizeof (Elf32_External_Rela);
10571
10572 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10573 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10574 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10575 loc += sizeof (Elf32_External_Rela);
10576
10577 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10578 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10579 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10580 loc += sizeof (Elf32_External_Rela);
10581 }
10582 }
10583 }
10584
10585 if (htab->glink != NULL
10586 && htab->glink->contents != NULL
10587 && htab->elf.dynamic_sections_created)
10588 {
10589 unsigned char *p;
10590 unsigned char *endp;
10591 bfd_vma res0;
10592
10593 /*
10594 * PIC glink code is the following:
10595 *
10596 * # ith PLT code stub.
10597 * addis 11,30,(plt+(i-1)*4-got)@ha
10598 * lwz 11,(plt+(i-1)*4-got)@l(11)
10599 * mtctr 11
10600 * bctr
10601 *
10602 * # A table of branches, one for each plt entry.
10603 * # The idea is that the plt call stub loads ctr and r11 with these
10604 * # addresses, so (r11 - res_0) gives the plt index * 4.
10605 * res_0: b PLTresolve
10606 * res_1: b PLTresolve
10607 * .
10608 * # Some number of entries towards the end can be nops
10609 * res_n_m3: nop
10610 * res_n_m2: nop
10611 * res_n_m1:
10612 *
10613 * PLTresolve:
10614 * addis 11,11,(1f-res_0)@ha
10615 * mflr 0
10616 * bcl 20,31,1f
10617 * 1: addi 11,11,(1b-res_0)@l
10618 * mflr 12
10619 * mtlr 0
10620 * sub 11,11,12 # r11 = index * 4
10621 * addis 12,12,(got+4-1b)@ha
10622 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10623 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10624 * mtctr 0
10625 * add 0,11,11
10626 * add 11,0,11 # r11 = index * 12 = reloc offset.
10627 * bctr
10628 *
10629 * Non-PIC glink code is a little simpler.
10630 *
10631 * # ith PLT code stub.
10632 * lis 11,(plt+(i-1)*4)@ha
10633 * lwz 11,(plt+(i-1)*4)@l(11)
10634 * mtctr 11
10635 * bctr
10636 *
10637 * The branch table is the same, then comes
10638 *
10639 * PLTresolve:
10640 * lis 12,(got+4)@ha
10641 * addis 11,11,(-res_0)@ha
10642 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10643 * addi 11,11,(-res_0)@l # r11 = index * 4
10644 * mtctr 0
10645 * add 0,11,11
10646 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10647 * add 11,0,11 # r11 = index * 12 = reloc offset.
10648 * bctr
10649 */
10650
10651 /* Build the branch table, one for each plt entry (less one),
10652 and perhaps some padding. */
10653 p = htab->glink->contents;
10654 p += htab->glink_pltresolve;
10655 endp = htab->glink->contents;
10656 endp += htab->glink->size - GLINK_PLTRESOLVE;
10657 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10658 {
10659 bfd_put_32 (output_bfd, B + endp - p, p);
10660 p += 4;
10661 }
10662 while (p < endp)
10663 {
10664 bfd_put_32 (output_bfd, NOP, p);
10665 p += 4;
10666 }
10667
10668 res0 = (htab->glink_pltresolve
10669 + htab->glink->output_section->vma
10670 + htab->glink->output_offset);
10671
10672 if (htab->params->ppc476_workaround)
10673 {
10674 /* Ensure that a call stub at the end of a page doesn't
10675 result in prefetch over the end of the page into the
10676 glink branch table. */
10677 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10678 bfd_vma page_addr;
10679 bfd_vma glink_start = (htab->glink->output_section->vma
10680 + htab->glink->output_offset);
10681
10682 for (page_addr = res0 & -pagesize;
10683 page_addr > glink_start;
10684 page_addr -= pagesize)
10685 {
10686 /* We have a plt call stub that may need fixing. */
10687 bfd_byte *loc;
10688 unsigned int insn;
10689
10690 loc = htab->glink->contents + page_addr - 4 - glink_start;
10691 insn = bfd_get_32 (output_bfd, loc);
10692 if (insn == BCTR)
10693 {
10694 /* By alignment, we know that there must be at least
10695 one other call stub before this one. */
10696 insn = bfd_get_32 (output_bfd, loc - 16);
10697 if (insn == BCTR)
10698 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10699 else
10700 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10701 }
10702 }
10703 }
10704
10705 /* Last comes the PLTresolve stub. */
10706 endp = p + GLINK_PLTRESOLVE;
10707 if (bfd_link_pic (info))
10708 {
10709 bfd_vma bcl;
10710
10711 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10712 + htab->glink->output_section->vma
10713 + htab->glink->output_offset);
10714
10715 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (bcl - res0), p);
10716 p += 4;
10717 bfd_put_32 (output_bfd, MFLR_0, p);
10718 p += 4;
10719 bfd_put_32 (output_bfd, BCL_20_31, p);
10720 p += 4;
10721 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (bcl - res0), p);
10722 p += 4;
10723 bfd_put_32 (output_bfd, MFLR_12, p);
10724 p += 4;
10725 bfd_put_32 (output_bfd, MTLR_0, p);
10726 p += 4;
10727 bfd_put_32 (output_bfd, SUB_11_11_12, p);
10728 p += 4;
10729 bfd_put_32 (output_bfd, ADDIS_12_12 + PPC_HA (got + 4 - bcl), p);
10730 p += 4;
10731 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10732 {
10733 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4 - bcl), p);
10734 p += 4;
10735 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8 - bcl), p);
10736 p += 4;
10737 }
10738 else
10739 {
10740 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4 - bcl), p);
10741 p += 4;
10742 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
10743 p += 4;
10744 }
10745 bfd_put_32 (output_bfd, MTCTR_0, p);
10746 p += 4;
10747 bfd_put_32 (output_bfd, ADD_0_11_11, p);
10748 }
10749 else
10750 {
10751 bfd_put_32 (output_bfd, LIS_12 + PPC_HA (got + 4), p);
10752 p += 4;
10753 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (-res0), p);
10754 p += 4;
10755 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10756 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4), p);
10757 else
10758 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4), p);
10759 p += 4;
10760 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (-res0), p);
10761 p += 4;
10762 bfd_put_32 (output_bfd, MTCTR_0, p);
10763 p += 4;
10764 bfd_put_32 (output_bfd, ADD_0_11_11, p);
10765 p += 4;
10766 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10767 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8), p);
10768 else
10769 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
10770 }
10771 p += 4;
10772 bfd_put_32 (output_bfd, ADD_11_0_11, p);
10773 p += 4;
10774 bfd_put_32 (output_bfd, BCTR, p);
10775 p += 4;
10776 while (p < endp)
10777 {
10778 bfd_put_32 (output_bfd,
10779 htab->params->ppc476_workaround ? BA : NOP, p);
10780 p += 4;
10781 }
10782 BFD_ASSERT (p == endp);
10783 }
10784
10785 if (htab->glink_eh_frame != NULL
10786 && htab->glink_eh_frame->contents != NULL)
10787 {
10788 unsigned char *p = htab->glink_eh_frame->contents;
10789 bfd_vma val;
10790
10791 p += sizeof (glink_eh_frame_cie);
10792 /* FDE length. */
10793 p += 4;
10794 /* CIE pointer. */
10795 p += 4;
10796 /* Offset to .glink. */
10797 val = (htab->glink->output_section->vma
10798 + htab->glink->output_offset);
10799 val -= (htab->glink_eh_frame->output_section->vma
10800 + htab->glink_eh_frame->output_offset);
10801 val -= p - htab->glink_eh_frame->contents;
10802 bfd_put_32 (htab->elf.dynobj, val, p);
10803
10804 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10805 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10806 htab->glink_eh_frame,
10807 htab->glink_eh_frame->contents))
10808 return FALSE;
10809 }
10810
10811 return ret;
10812 }
10813 \f
10814 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10815 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10816 #define TARGET_BIG_SYM powerpc_elf32_vec
10817 #define TARGET_BIG_NAME "elf32-powerpc"
10818 #define ELF_ARCH bfd_arch_powerpc
10819 #define ELF_TARGET_ID PPC32_ELF_DATA
10820 #define ELF_MACHINE_CODE EM_PPC
10821 #ifdef __QNXTARGET__
10822 #define ELF_MAXPAGESIZE 0x1000
10823 #define ELF_COMMONPAGESIZE 0x1000
10824 #else
10825 #define ELF_MAXPAGESIZE 0x10000
10826 #define ELF_COMMONPAGESIZE 0x10000
10827 #endif
10828 #define ELF_MINPAGESIZE 0x1000
10829 #define elf_info_to_howto ppc_elf_info_to_howto
10830
10831 #ifdef EM_CYGNUS_POWERPC
10832 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10833 #endif
10834
10835 #ifdef EM_PPC_OLD
10836 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10837 #endif
10838
10839 #define elf_backend_plt_not_loaded 1
10840 #define elf_backend_want_dynrelro 1
10841 #define elf_backend_can_gc_sections 1
10842 #define elf_backend_can_refcount 1
10843 #define elf_backend_rela_normal 1
10844 #define elf_backend_caches_rawsize 1
10845
10846 #define bfd_elf32_mkobject ppc_elf_mkobject
10847 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10848 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10849 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10850 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10851 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10852 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10853 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10854
10855 #define elf_backend_object_p ppc_elf_object_p
10856 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10857 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10858 #define elf_backend_relocate_section ppc_elf_relocate_section
10859 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10860 #define elf_backend_check_relocs ppc_elf_check_relocs
10861 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
10862 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10863 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10864 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10865 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10866 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10867 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10868 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10869 #define elf_backend_fake_sections ppc_elf_fake_sections
10870 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10871 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10872 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10873 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10874 #define elf_backend_write_core_note ppc_elf_write_core_note
10875 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10876 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10877 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10878 #define elf_backend_write_section ppc_elf_write_section
10879 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10880 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10881 #define elf_backend_action_discarded ppc_elf_action_discarded
10882 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10883 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10884
10885 #include "elf32-target.h"
10886
10887 /* FreeBSD Target */
10888
10889 #undef TARGET_LITTLE_SYM
10890 #undef TARGET_LITTLE_NAME
10891
10892 #undef TARGET_BIG_SYM
10893 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10894 #undef TARGET_BIG_NAME
10895 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10896
10897 #undef ELF_OSABI
10898 #define ELF_OSABI ELFOSABI_FREEBSD
10899
10900 #undef elf32_bed
10901 #define elf32_bed elf32_powerpc_fbsd_bed
10902
10903 #include "elf32-target.h"
10904
10905 /* VxWorks Target */
10906
10907 #undef TARGET_LITTLE_SYM
10908 #undef TARGET_LITTLE_NAME
10909
10910 #undef TARGET_BIG_SYM
10911 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10912 #undef TARGET_BIG_NAME
10913 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10914
10915 #undef ELF_OSABI
10916
10917 /* VxWorks uses the elf default section flags for .plt. */
10918 static const struct bfd_elf_special_section *
10919 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
10920 {
10921 if (sec->name == NULL)
10922 return NULL;
10923
10924 if (strcmp (sec->name, ".plt") == 0)
10925 return _bfd_elf_get_sec_type_attr (abfd, sec);
10926
10927 return ppc_elf_get_sec_type_attr (abfd, sec);
10928 }
10929
10930 /* Like ppc_elf_link_hash_table_create, but overrides
10931 appropriately for VxWorks. */
10932 static struct bfd_link_hash_table *
10933 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10934 {
10935 struct bfd_link_hash_table *ret;
10936
10937 ret = ppc_elf_link_hash_table_create (abfd);
10938 if (ret)
10939 {
10940 struct ppc_elf_link_hash_table *htab
10941 = (struct ppc_elf_link_hash_table *)ret;
10942 htab->is_vxworks = 1;
10943 htab->plt_type = PLT_VXWORKS;
10944 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10945 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10946 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10947 }
10948 return ret;
10949 }
10950
10951 /* Tweak magic VxWorks symbols as they are loaded. */
10952 static bfd_boolean
10953 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10954 struct bfd_link_info *info,
10955 Elf_Internal_Sym *sym,
10956 const char **namep,
10957 flagword *flagsp,
10958 asection **secp,
10959 bfd_vma *valp)
10960 {
10961 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
10962 valp))
10963 return FALSE;
10964
10965 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
10966 }
10967
10968 static void
10969 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10970 {
10971 ppc_elf_final_write_processing (abfd, linker);
10972 elf_vxworks_final_write_processing (abfd, linker);
10973 }
10974
10975 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10976 define it. */
10977 #undef elf_backend_want_plt_sym
10978 #define elf_backend_want_plt_sym 1
10979 #undef elf_backend_want_got_plt
10980 #define elf_backend_want_got_plt 1
10981 #undef elf_backend_got_symbol_offset
10982 #define elf_backend_got_symbol_offset 0
10983 #undef elf_backend_plt_not_loaded
10984 #define elf_backend_plt_not_loaded 0
10985 #undef elf_backend_plt_readonly
10986 #define elf_backend_plt_readonly 1
10987 #undef elf_backend_got_header_size
10988 #define elf_backend_got_header_size 12
10989 #undef elf_backend_dtrel_excludes_plt
10990 #define elf_backend_dtrel_excludes_plt 1
10991
10992 #undef bfd_elf32_get_synthetic_symtab
10993
10994 #undef bfd_elf32_bfd_link_hash_table_create
10995 #define bfd_elf32_bfd_link_hash_table_create \
10996 ppc_elf_vxworks_link_hash_table_create
10997 #undef elf_backend_add_symbol_hook
10998 #define elf_backend_add_symbol_hook \
10999 ppc_elf_vxworks_add_symbol_hook
11000 #undef elf_backend_link_output_symbol_hook
11001 #define elf_backend_link_output_symbol_hook \
11002 elf_vxworks_link_output_symbol_hook
11003 #undef elf_backend_final_write_processing
11004 #define elf_backend_final_write_processing \
11005 ppc_elf_vxworks_final_write_processing
11006 #undef elf_backend_get_sec_type_attr
11007 #define elf_backend_get_sec_type_attr \
11008 ppc_elf_vxworks_get_sec_type_attr
11009 #undef elf_backend_emit_relocs
11010 #define elf_backend_emit_relocs \
11011 elf_vxworks_emit_relocs
11012
11013 #undef elf32_bed
11014 #define elf32_bed ppc_elf_vxworks_bed
11015 #undef elf_backend_post_process_headers
11016
11017 #include "elf32-target.h"
GDB Binutils - Deliverables
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