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[binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2018 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE(htab, h) \
72 ((4*4 \
73 + (h != NULL \
74 && h == htab->tls_get_addr \
75 && !htab->params->no_tls_get_addr_opt ? 8*4 : 0) \
76 + (1u << htab->params->plt_stub_align) - 1) \
77 & -(1u << htab->params->plt_stub_align))
78
79 /* VxWorks uses its own plt layout, filled in by the static linker. */
80
81 /* The standard VxWorks PLT entry. */
82 #define VXWORKS_PLT_ENTRY_SIZE 32
83 static const bfd_vma ppc_elf_vxworks_plt_entry
84 [VXWORKS_PLT_ENTRY_SIZE / 4] =
85 {
86 0x3d800000, /* lis r12,0 */
87 0x818c0000, /* lwz r12,0(r12) */
88 0x7d8903a6, /* mtctr r12 */
89 0x4e800420, /* bctr */
90 0x39600000, /* li r11,0 */
91 0x48000000, /* b 14 <.PLT0resolve+0x4> */
92 0x60000000, /* nop */
93 0x60000000, /* nop */
94 };
95 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
96 [VXWORKS_PLT_ENTRY_SIZE / 4] =
97 {
98 0x3d9e0000, /* addis r12,r30,0 */
99 0x818c0000, /* lwz r12,0(r12) */
100 0x7d8903a6, /* mtctr r12 */
101 0x4e800420, /* bctr */
102 0x39600000, /* li r11,0 */
103 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
104 0x60000000, /* nop */
105 0x60000000, /* nop */
106 };
107
108 /* The initial VxWorks PLT entry. */
109 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
110 static const bfd_vma ppc_elf_vxworks_plt0_entry
111 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
112 {
113 0x3d800000, /* lis r12,0 */
114 0x398c0000, /* addi r12,r12,0 */
115 0x800c0008, /* lwz r0,8(r12) */
116 0x7c0903a6, /* mtctr r0 */
117 0x818c0004, /* lwz r12,4(r12) */
118 0x4e800420, /* bctr */
119 0x60000000, /* nop */
120 0x60000000, /* nop */
121 };
122 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
123 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
124 {
125 0x819e0008, /* lwz r12,8(r30) */
126 0x7d8903a6, /* mtctr r12 */
127 0x819e0004, /* lwz r12,4(r30) */
128 0x4e800420, /* bctr */
129 0x60000000, /* nop */
130 0x60000000, /* nop */
131 0x60000000, /* nop */
132 0x60000000, /* nop */
133 };
134
135 /* For executables, we have some additional relocations in
136 .rela.plt.unloaded, for the kernel loader. */
137
138 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
139 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
140 /* The number of relocations in the PLTResolve slot. */
141 #define VXWORKS_PLTRESOLVE_RELOCS 2
142 /* The number of relocations in the PLTResolve slot when creating
143 a shared library. */
144 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
145
146 /* Some instructions. */
147 #define ADDIS_11_11 0x3d6b0000
148 #define ADDIS_11_30 0x3d7e0000
149 #define ADDIS_12_12 0x3d8c0000
150 #define ADDI_11_11 0x396b0000
151 #define ADD_0_11_11 0x7c0b5a14
152 #define ADD_3_12_2 0x7c6c1214
153 #define ADD_11_0_11 0x7d605a14
154 #define B 0x48000000
155 #define BA 0x48000002
156 #define BCL_20_31 0x429f0005
157 #define BCTR 0x4e800420
158 #define BEQLR 0x4d820020
159 #define CMPWI_11_0 0x2c0b0000
160 #define LIS_11 0x3d600000
161 #define LIS_12 0x3d800000
162 #define LWZU_0_12 0x840c0000
163 #define LWZ_0_12 0x800c0000
164 #define LWZ_11_3 0x81630000
165 #define LWZ_11_11 0x816b0000
166 #define LWZ_11_30 0x817e0000
167 #define LWZ_12_3 0x81830000
168 #define LWZ_12_12 0x818c0000
169 #define MR_0_3 0x7c601b78
170 #define MR_3_0 0x7c030378
171 #define MFLR_0 0x7c0802a6
172 #define MFLR_12 0x7d8802a6
173 #define MTCTR_0 0x7c0903a6
174 #define MTCTR_11 0x7d6903a6
175 #define MTLR_0 0x7c0803a6
176 #define NOP 0x60000000
177 #define SUB_11_11_12 0x7d6c5850
178
179 /* Offset of tp and dtp pointers from start of TLS block. */
180 #define TP_OFFSET 0x7000
181 #define DTP_OFFSET 0x8000
182
183 /* The value of a defined global symbol. */
184 #define SYM_VAL(SYM) \
185 ((SYM)->root.u.def.section->output_section->vma \
186 + (SYM)->root.u.def.section->output_offset \
187 + (SYM)->root.u.def.value)
188 \f
189 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
190
191 static reloc_howto_type ppc_elf_howto_raw[] = {
192 /* This reloc does nothing. */
193 HOWTO (R_PPC_NONE, /* type */
194 0, /* rightshift */
195 3, /* size (0 = byte, 1 = short, 2 = long) */
196 0, /* bitsize */
197 FALSE, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_dont, /* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_PPC_NONE", /* name */
202 FALSE, /* partial_inplace */
203 0, /* src_mask */
204 0, /* dst_mask */
205 FALSE), /* pcrel_offset */
206
207 /* A standard 32 bit relocation. */
208 HOWTO (R_PPC_ADDR32, /* type */
209 0, /* rightshift */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
211 32, /* bitsize */
212 FALSE, /* pc_relative */
213 0, /* bitpos */
214 complain_overflow_dont, /* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_PPC_ADDR32", /* name */
217 FALSE, /* partial_inplace */
218 0, /* src_mask */
219 0xffffffff, /* dst_mask */
220 FALSE), /* pcrel_offset */
221
222 /* An absolute 26 bit branch; the lower two bits must be zero.
223 FIXME: we don't check that, we just clear them. */
224 HOWTO (R_PPC_ADDR24, /* type */
225 0, /* rightshift */
226 2, /* size (0 = byte, 1 = short, 2 = long) */
227 26, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_signed, /* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR24", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0x3fffffc, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* A standard 16 bit relocation. */
239 HOWTO (R_PPC_ADDR16, /* type */
240 0, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_bitfield, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* A 16 bit relocation without overflow. */
254 HOWTO (R_PPC_ADDR16_LO, /* type */
255 0, /* rightshift */
256 1, /* size (0 = byte, 1 = short, 2 = long) */
257 16, /* bitsize */
258 FALSE, /* pc_relative */
259 0, /* bitpos */
260 complain_overflow_dont,/* complain_on_overflow */
261 bfd_elf_generic_reloc, /* special_function */
262 "R_PPC_ADDR16_LO", /* name */
263 FALSE, /* partial_inplace */
264 0, /* src_mask */
265 0xffff, /* dst_mask */
266 FALSE), /* pcrel_offset */
267
268 /* The high order 16 bits of an address. */
269 HOWTO (R_PPC_ADDR16_HI, /* type */
270 16, /* rightshift */
271 1, /* size (0 = byte, 1 = short, 2 = long) */
272 16, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC_ADDR16_HI", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0xffff, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* The high order 16 bits of an address, plus 1 if the contents of
284 the low 16 bits, treated as a signed number, is negative. */
285 HOWTO (R_PPC_ADDR16_HA, /* type */
286 16, /* rightshift */
287 1, /* size (0 = byte, 1 = short, 2 = long) */
288 16, /* bitsize */
289 FALSE, /* pc_relative */
290 0, /* bitpos */
291 complain_overflow_dont, /* complain_on_overflow */
292 ppc_elf_addr16_ha_reloc, /* special_function */
293 "R_PPC_ADDR16_HA", /* name */
294 FALSE, /* partial_inplace */
295 0, /* src_mask */
296 0xffff, /* dst_mask */
297 FALSE), /* pcrel_offset */
298
299 /* An absolute 16 bit branch; the lower two bits must be zero.
300 FIXME: we don't check that, we just clear them. */
301 HOWTO (R_PPC_ADDR14, /* type */
302 0, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 0, /* bitpos */
307 complain_overflow_signed, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_PPC_ADDR14", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0xfffc, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* An absolute 16 bit branch, for which bit 10 should be set to
316 indicate that the branch is expected to be taken. The lower two
317 bits must be zero. */
318 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
319 0, /* rightshift */
320 2, /* size (0 = byte, 1 = short, 2 = long) */
321 16, /* bitsize */
322 FALSE, /* pc_relative */
323 0, /* bitpos */
324 complain_overflow_signed, /* complain_on_overflow */
325 bfd_elf_generic_reloc, /* special_function */
326 "R_PPC_ADDR14_BRTAKEN",/* name */
327 FALSE, /* partial_inplace */
328 0, /* src_mask */
329 0xfffc, /* dst_mask */
330 FALSE), /* pcrel_offset */
331
332 /* An absolute 16 bit branch, for which bit 10 should be set to
333 indicate that the branch is not expected to be taken. The lower
334 two bits must be zero. */
335 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_ADDR14_BRNTAKEN",/* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* A relative 26 bit branch; the lower two bits must be zero. */
350 HOWTO (R_PPC_REL24, /* type */
351 0, /* rightshift */
352 2, /* size (0 = byte, 1 = short, 2 = long) */
353 26, /* bitsize */
354 TRUE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC_REL24", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0x3fffffc, /* dst_mask */
362 TRUE), /* pcrel_offset */
363
364 /* A relative 16 bit branch; the lower two bits must be zero. */
365 HOWTO (R_PPC_REL14, /* type */
366 0, /* rightshift */
367 2, /* size (0 = byte, 1 = short, 2 = long) */
368 16, /* bitsize */
369 TRUE, /* pc_relative */
370 0, /* bitpos */
371 complain_overflow_signed, /* complain_on_overflow */
372 bfd_elf_generic_reloc, /* special_function */
373 "R_PPC_REL14", /* name */
374 FALSE, /* partial_inplace */
375 0, /* src_mask */
376 0xfffc, /* dst_mask */
377 TRUE), /* pcrel_offset */
378
379 /* A relative 16 bit branch. Bit 10 should be set to indicate that
380 the branch is expected to be taken. The lower two bits must be
381 zero. */
382 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 TRUE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_PPC_REL14_BRTAKEN", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0xfffc, /* dst_mask */
394 TRUE), /* pcrel_offset */
395
396 /* A relative 16 bit branch. Bit 10 should be set to indicate that
397 the branch is not expected to be taken. The lower two bits must
398 be zero. */
399 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 TRUE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 bfd_elf_generic_reloc, /* special_function */
407 "R_PPC_REL14_BRNTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0xfffc, /* dst_mask */
411 TRUE), /* pcrel_offset */
412
413 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
414 symbol. */
415 HOWTO (R_PPC_GOT16, /* type */
416 0, /* rightshift */
417 1, /* size (0 = byte, 1 = short, 2 = long) */
418 16, /* bitsize */
419 FALSE, /* pc_relative */
420 0, /* bitpos */
421 complain_overflow_signed, /* complain_on_overflow */
422 ppc_elf_unhandled_reloc, /* special_function */
423 "R_PPC_GOT16", /* name */
424 FALSE, /* partial_inplace */
425 0, /* src_mask */
426 0xffff, /* dst_mask */
427 FALSE), /* pcrel_offset */
428
429 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
430 the symbol. */
431 HOWTO (R_PPC_GOT16_LO, /* type */
432 0, /* rightshift */
433 1, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 FALSE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_dont, /* complain_on_overflow */
438 ppc_elf_unhandled_reloc, /* special_function */
439 "R_PPC_GOT16_LO", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0xffff, /* dst_mask */
443 FALSE), /* pcrel_offset */
444
445 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
446 the symbol. */
447 HOWTO (R_PPC_GOT16_HI, /* type */
448 16, /* rightshift */
449 1, /* size (0 = byte, 1 = short, 2 = long) */
450 16, /* bitsize */
451 FALSE, /* pc_relative */
452 0, /* bitpos */
453 complain_overflow_dont, /* complain_on_overflow */
454 ppc_elf_unhandled_reloc, /* special_function */
455 "R_PPC_GOT16_HI", /* name */
456 FALSE, /* partial_inplace */
457 0, /* src_mask */
458 0xffff, /* dst_mask */
459 FALSE), /* pcrel_offset */
460
461 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
462 the symbol. */
463 HOWTO (R_PPC_GOT16_HA, /* type */
464 16, /* rightshift */
465 1, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 FALSE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_dont, /* complain_on_overflow */
470 ppc_elf_unhandled_reloc, /* special_function */
471 "R_PPC_GOT16_HA", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0xffff, /* dst_mask */
475 FALSE), /* pcrel_offset */
476
477 /* Like R_PPC_REL24, but referring to the procedure linkage table
478 entry for the symbol. */
479 HOWTO (R_PPC_PLTREL24, /* type */
480 0, /* rightshift */
481 2, /* size (0 = byte, 1 = short, 2 = long) */
482 26, /* bitsize */
483 TRUE, /* pc_relative */
484 0, /* bitpos */
485 complain_overflow_signed, /* complain_on_overflow */
486 ppc_elf_unhandled_reloc, /* special_function */
487 "R_PPC_PLTREL24", /* name */
488 FALSE, /* partial_inplace */
489 0, /* src_mask */
490 0x3fffffc, /* dst_mask */
491 TRUE), /* pcrel_offset */
492
493 /* This is used only by the dynamic linker. The symbol should exist
494 both in the object being run and in some shared library. The
495 dynamic linker copies the data addressed by the symbol from the
496 shared library into the object, because the object being
497 run has to have the data at some particular address. */
498 HOWTO (R_PPC_COPY, /* type */
499 0, /* rightshift */
500 2, /* size (0 = byte, 1 = short, 2 = long) */
501 32, /* bitsize */
502 FALSE, /* pc_relative */
503 0, /* bitpos */
504 complain_overflow_dont, /* complain_on_overflow */
505 ppc_elf_unhandled_reloc, /* special_function */
506 "R_PPC_COPY", /* name */
507 FALSE, /* partial_inplace */
508 0, /* src_mask */
509 0, /* dst_mask */
510 FALSE), /* pcrel_offset */
511
512 /* Like R_PPC_ADDR32, but used when setting global offset table
513 entries. */
514 HOWTO (R_PPC_GLOB_DAT, /* type */
515 0, /* rightshift */
516 2, /* size (0 = byte, 1 = short, 2 = long) */
517 32, /* bitsize */
518 FALSE, /* pc_relative */
519 0, /* bitpos */
520 complain_overflow_dont, /* complain_on_overflow */
521 ppc_elf_unhandled_reloc, /* special_function */
522 "R_PPC_GLOB_DAT", /* name */
523 FALSE, /* partial_inplace */
524 0, /* src_mask */
525 0xffffffff, /* dst_mask */
526 FALSE), /* pcrel_offset */
527
528 /* Marks a procedure linkage table entry for a symbol. */
529 HOWTO (R_PPC_JMP_SLOT, /* type */
530 0, /* rightshift */
531 2, /* size (0 = byte, 1 = short, 2 = long) */
532 32, /* bitsize */
533 FALSE, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_dont, /* complain_on_overflow */
536 ppc_elf_unhandled_reloc, /* special_function */
537 "R_PPC_JMP_SLOT", /* name */
538 FALSE, /* partial_inplace */
539 0, /* src_mask */
540 0, /* dst_mask */
541 FALSE), /* pcrel_offset */
542
543 /* Used only by the dynamic linker. When the object is run, this
544 longword is set to the load address of the object, plus the
545 addend. */
546 HOWTO (R_PPC_RELATIVE, /* type */
547 0, /* rightshift */
548 2, /* size (0 = byte, 1 = short, 2 = long) */
549 32, /* bitsize */
550 FALSE, /* pc_relative */
551 0, /* bitpos */
552 complain_overflow_dont, /* complain_on_overflow */
553 bfd_elf_generic_reloc, /* special_function */
554 "R_PPC_RELATIVE", /* name */
555 FALSE, /* partial_inplace */
556 0, /* src_mask */
557 0xffffffff, /* dst_mask */
558 FALSE), /* pcrel_offset */
559
560 /* Like R_PPC_REL24, but uses the value of the symbol within the
561 object rather than the final value. Normally used for
562 _GLOBAL_OFFSET_TABLE_. */
563 HOWTO (R_PPC_LOCAL24PC, /* type */
564 0, /* rightshift */
565 2, /* size (0 = byte, 1 = short, 2 = long) */
566 26, /* bitsize */
567 TRUE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_signed, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_LOCAL24PC", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0x3fffffc, /* dst_mask */
575 TRUE), /* pcrel_offset */
576
577 /* Like R_PPC_ADDR32, but may be unaligned. */
578 HOWTO (R_PPC_UADDR32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 FALSE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_dont, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_UADDR32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 FALSE), /* pcrel_offset */
591
592 /* Like R_PPC_ADDR16, but may be unaligned. */
593 HOWTO (R_PPC_UADDR16, /* type */
594 0, /* rightshift */
595 1, /* size (0 = byte, 1 = short, 2 = long) */
596 16, /* bitsize */
597 FALSE, /* pc_relative */
598 0, /* bitpos */
599 complain_overflow_bitfield, /* complain_on_overflow */
600 bfd_elf_generic_reloc, /* special_function */
601 "R_PPC_UADDR16", /* name */
602 FALSE, /* partial_inplace */
603 0, /* src_mask */
604 0xffff, /* dst_mask */
605 FALSE), /* pcrel_offset */
606
607 /* 32-bit PC relative */
608 HOWTO (R_PPC_REL32, /* type */
609 0, /* rightshift */
610 2, /* size (0 = byte, 1 = short, 2 = long) */
611 32, /* bitsize */
612 TRUE, /* pc_relative */
613 0, /* bitpos */
614 complain_overflow_dont, /* complain_on_overflow */
615 bfd_elf_generic_reloc, /* special_function */
616 "R_PPC_REL32", /* name */
617 FALSE, /* partial_inplace */
618 0, /* src_mask */
619 0xffffffff, /* dst_mask */
620 TRUE), /* pcrel_offset */
621
622 /* 32-bit relocation to the symbol's procedure linkage table.
623 FIXME: not supported. */
624 HOWTO (R_PPC_PLT32, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_dont, /* complain_on_overflow */
631 ppc_elf_unhandled_reloc, /* special_function */
632 "R_PPC_PLT32", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
639 FIXME: not supported. */
640 HOWTO (R_PPC_PLTREL32, /* type */
641 0, /* rightshift */
642 2, /* size (0 = byte, 1 = short, 2 = long) */
643 32, /* bitsize */
644 TRUE, /* pc_relative */
645 0, /* bitpos */
646 complain_overflow_dont, /* complain_on_overflow */
647 ppc_elf_unhandled_reloc, /* special_function */
648 "R_PPC_PLTREL32", /* name */
649 FALSE, /* partial_inplace */
650 0, /* src_mask */
651 0, /* dst_mask */
652 TRUE), /* pcrel_offset */
653
654 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
655 the symbol. */
656 HOWTO (R_PPC_PLT16_LO, /* type */
657 0, /* rightshift */
658 1, /* size (0 = byte, 1 = short, 2 = long) */
659 16, /* bitsize */
660 FALSE, /* pc_relative */
661 0, /* bitpos */
662 complain_overflow_dont, /* complain_on_overflow */
663 ppc_elf_unhandled_reloc, /* special_function */
664 "R_PPC_PLT16_LO", /* name */
665 FALSE, /* partial_inplace */
666 0, /* src_mask */
667 0xffff, /* dst_mask */
668 FALSE), /* pcrel_offset */
669
670 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
671 the symbol. */
672 HOWTO (R_PPC_PLT16_HI, /* type */
673 16, /* rightshift */
674 1, /* size (0 = byte, 1 = short, 2 = long) */
675 16, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_dont, /* complain_on_overflow */
679 ppc_elf_unhandled_reloc, /* special_function */
680 "R_PPC_PLT16_HI", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
687 the symbol. */
688 HOWTO (R_PPC_PLT16_HA, /* type */
689 16, /* rightshift */
690 1, /* size (0 = byte, 1 = short, 2 = long) */
691 16, /* bitsize */
692 FALSE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_dont, /* complain_on_overflow */
695 ppc_elf_unhandled_reloc, /* special_function */
696 "R_PPC_PLT16_HA", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffff, /* dst_mask */
700 FALSE), /* pcrel_offset */
701
702 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
703 small data items. */
704 HOWTO (R_PPC_SDAREL16, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_signed, /* complain_on_overflow */
711 ppc_elf_unhandled_reloc, /* special_function */
712 "R_PPC_SDAREL16", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit section relative relocation. */
719 HOWTO (R_PPC_SECTOFF, /* type */
720 0, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_signed, /* complain_on_overflow */
726 ppc_elf_unhandled_reloc, /* special_function */
727 "R_PPC_SECTOFF", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit lower half section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_LO, /* type */
735 0, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_dont, /* complain_on_overflow */
741 ppc_elf_unhandled_reloc, /* special_function */
742 "R_PPC_SECTOFF_LO", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* 16-bit upper half section relative relocation. */
749 HOWTO (R_PPC_SECTOFF_HI, /* type */
750 16, /* rightshift */
751 1, /* size (0 = byte, 1 = short, 2 = long) */
752 16, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 ppc_elf_unhandled_reloc, /* special_function */
757 "R_PPC_SECTOFF_HI", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0xffff, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* 16-bit upper half adjusted section relative relocation. */
764 HOWTO (R_PPC_SECTOFF_HA, /* type */
765 16, /* rightshift */
766 1, /* size (0 = byte, 1 = short, 2 = long) */
767 16, /* bitsize */
768 FALSE, /* pc_relative */
769 0, /* bitpos */
770 complain_overflow_dont, /* complain_on_overflow */
771 ppc_elf_unhandled_reloc, /* special_function */
772 "R_PPC_SECTOFF_HA", /* name */
773 FALSE, /* partial_inplace */
774 0, /* src_mask */
775 0xffff, /* dst_mask */
776 FALSE), /* pcrel_offset */
777
778 /* Marker relocs for TLS. */
779 HOWTO (R_PPC_TLS,
780 0, /* rightshift */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
782 32, /* bitsize */
783 FALSE, /* pc_relative */
784 0, /* bitpos */
785 complain_overflow_dont, /* complain_on_overflow */
786 bfd_elf_generic_reloc, /* special_function */
787 "R_PPC_TLS", /* name */
788 FALSE, /* partial_inplace */
789 0, /* src_mask */
790 0, /* dst_mask */
791 FALSE), /* pcrel_offset */
792
793 HOWTO (R_PPC_TLSGD,
794 0, /* rightshift */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
796 32, /* bitsize */
797 FALSE, /* pc_relative */
798 0, /* bitpos */
799 complain_overflow_dont, /* complain_on_overflow */
800 bfd_elf_generic_reloc, /* special_function */
801 "R_PPC_TLSGD", /* name */
802 FALSE, /* partial_inplace */
803 0, /* src_mask */
804 0, /* dst_mask */
805 FALSE), /* pcrel_offset */
806
807 HOWTO (R_PPC_TLSLD,
808 0, /* rightshift */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
810 32, /* bitsize */
811 FALSE, /* pc_relative */
812 0, /* bitpos */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 "R_PPC_TLSLD", /* name */
816 FALSE, /* partial_inplace */
817 0, /* src_mask */
818 0, /* dst_mask */
819 FALSE), /* pcrel_offset */
820
821 /* Marker relocs on inline plt call instructions. */
822 HOWTO (R_PPC_PLTSEQ,
823 0, /* rightshift */
824 2, /* size (0 = byte, 1 = short, 2 = long) */
825 32, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 bfd_elf_generic_reloc, /* special_function */
830 "R_PPC_PLTSEQ", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 HOWTO (R_PPC_PLTCALL,
837 0, /* rightshift */
838 2, /* size (0 = byte, 1 = short, 2 = long) */
839 32, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 bfd_elf_generic_reloc, /* special_function */
844 "R_PPC_PLTCALL", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Computes the load module index of the load module that contains the
851 definition of its TLS sym. */
852 HOWTO (R_PPC_DTPMOD32,
853 0, /* rightshift */
854 2, /* size (0 = byte, 1 = short, 2 = long) */
855 32, /* bitsize */
856 FALSE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 ppc_elf_unhandled_reloc, /* special_function */
860 "R_PPC_DTPMOD32", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 0xffffffff, /* dst_mask */
864 FALSE), /* pcrel_offset */
865
866 /* Computes a dtv-relative displacement, the difference between the value
867 of sym+add and the base address of the thread-local storage block that
868 contains the definition of sym, minus 0x8000. */
869 HOWTO (R_PPC_DTPREL32,
870 0, /* rightshift */
871 2, /* size (0 = byte, 1 = short, 2 = long) */
872 32, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 ppc_elf_unhandled_reloc, /* special_function */
877 "R_PPC_DTPREL32", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 0xffffffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* A 16 bit dtprel reloc. */
884 HOWTO (R_PPC_DTPREL16,
885 0, /* rightshift */
886 1, /* size (0 = byte, 1 = short, 2 = long) */
887 16, /* bitsize */
888 FALSE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_signed, /* complain_on_overflow */
891 ppc_elf_unhandled_reloc, /* special_function */
892 "R_PPC_DTPREL16", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 0xffff, /* dst_mask */
896 FALSE), /* pcrel_offset */
897
898 /* Like DTPREL16, but no overflow. */
899 HOWTO (R_PPC_DTPREL16_LO,
900 0, /* rightshift */
901 1, /* size (0 = byte, 1 = short, 2 = long) */
902 16, /* bitsize */
903 FALSE, /* pc_relative */
904 0, /* bitpos */
905 complain_overflow_dont, /* complain_on_overflow */
906 ppc_elf_unhandled_reloc, /* special_function */
907 "R_PPC_DTPREL16_LO", /* name */
908 FALSE, /* partial_inplace */
909 0, /* src_mask */
910 0xffff, /* dst_mask */
911 FALSE), /* pcrel_offset */
912
913 /* Like DTPREL16_LO, but next higher group of 16 bits. */
914 HOWTO (R_PPC_DTPREL16_HI,
915 16, /* rightshift */
916 1, /* size (0 = byte, 1 = short, 2 = long) */
917 16, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_dont, /* complain_on_overflow */
921 ppc_elf_unhandled_reloc, /* special_function */
922 "R_PPC_DTPREL16_HI", /* name */
923 FALSE, /* partial_inplace */
924 0, /* src_mask */
925 0xffff, /* dst_mask */
926 FALSE), /* pcrel_offset */
927
928 /* Like DTPREL16_HI, but adjust for low 16 bits. */
929 HOWTO (R_PPC_DTPREL16_HA,
930 16, /* rightshift */
931 1, /* size (0 = byte, 1 = short, 2 = long) */
932 16, /* bitsize */
933 FALSE, /* pc_relative */
934 0, /* bitpos */
935 complain_overflow_dont, /* complain_on_overflow */
936 ppc_elf_unhandled_reloc, /* special_function */
937 "R_PPC_DTPREL16_HA", /* name */
938 FALSE, /* partial_inplace */
939 0, /* src_mask */
940 0xffff, /* dst_mask */
941 FALSE), /* pcrel_offset */
942
943 /* Computes a tp-relative displacement, the difference between the value of
944 sym+add and the value of the thread pointer (r13). */
945 HOWTO (R_PPC_TPREL32,
946 0, /* rightshift */
947 2, /* size (0 = byte, 1 = short, 2 = long) */
948 32, /* bitsize */
949 FALSE, /* pc_relative */
950 0, /* bitpos */
951 complain_overflow_dont, /* complain_on_overflow */
952 ppc_elf_unhandled_reloc, /* special_function */
953 "R_PPC_TPREL32", /* name */
954 FALSE, /* partial_inplace */
955 0, /* src_mask */
956 0xffffffff, /* dst_mask */
957 FALSE), /* pcrel_offset */
958
959 /* A 16 bit tprel reloc. */
960 HOWTO (R_PPC_TPREL16,
961 0, /* rightshift */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
963 16, /* bitsize */
964 FALSE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_signed, /* complain_on_overflow */
967 ppc_elf_unhandled_reloc, /* special_function */
968 "R_PPC_TPREL16", /* name */
969 FALSE, /* partial_inplace */
970 0, /* src_mask */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
973
974 /* Like TPREL16, but no overflow. */
975 HOWTO (R_PPC_TPREL16_LO,
976 0, /* rightshift */
977 1, /* size (0 = byte, 1 = short, 2 = long) */
978 16, /* bitsize */
979 FALSE, /* pc_relative */
980 0, /* bitpos */
981 complain_overflow_dont, /* complain_on_overflow */
982 ppc_elf_unhandled_reloc, /* special_function */
983 "R_PPC_TPREL16_LO", /* name */
984 FALSE, /* partial_inplace */
985 0, /* src_mask */
986 0xffff, /* dst_mask */
987 FALSE), /* pcrel_offset */
988
989 /* Like TPREL16_LO, but next higher group of 16 bits. */
990 HOWTO (R_PPC_TPREL16_HI,
991 16, /* rightshift */
992 1, /* size (0 = byte, 1 = short, 2 = long) */
993 16, /* bitsize */
994 FALSE, /* pc_relative */
995 0, /* bitpos */
996 complain_overflow_dont, /* complain_on_overflow */
997 ppc_elf_unhandled_reloc, /* special_function */
998 "R_PPC_TPREL16_HI", /* name */
999 FALSE, /* partial_inplace */
1000 0, /* src_mask */
1001 0xffff, /* dst_mask */
1002 FALSE), /* pcrel_offset */
1003
1004 /* Like TPREL16_HI, but adjust for low 16 bits. */
1005 HOWTO (R_PPC_TPREL16_HA,
1006 16, /* rightshift */
1007 1, /* size (0 = byte, 1 = short, 2 = long) */
1008 16, /* bitsize */
1009 FALSE, /* pc_relative */
1010 0, /* bitpos */
1011 complain_overflow_dont, /* complain_on_overflow */
1012 ppc_elf_unhandled_reloc, /* special_function */
1013 "R_PPC_TPREL16_HA", /* name */
1014 FALSE, /* partial_inplace */
1015 0, /* src_mask */
1016 0xffff, /* dst_mask */
1017 FALSE), /* pcrel_offset */
1018
1019 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1020 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1021 to the first entry. */
1022 HOWTO (R_PPC_GOT_TLSGD16,
1023 0, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc_elf_unhandled_reloc, /* special_function */
1030 "R_PPC_GOT_TLSGD16", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* Like GOT_TLSGD16, but no overflow. */
1037 HOWTO (R_PPC_GOT_TLSGD16_LO,
1038 0, /* rightshift */
1039 1, /* size (0 = byte, 1 = short, 2 = long) */
1040 16, /* bitsize */
1041 FALSE, /* pc_relative */
1042 0, /* bitpos */
1043 complain_overflow_dont, /* complain_on_overflow */
1044 ppc_elf_unhandled_reloc, /* special_function */
1045 "R_PPC_GOT_TLSGD16_LO", /* name */
1046 FALSE, /* partial_inplace */
1047 0, /* src_mask */
1048 0xffff, /* dst_mask */
1049 FALSE), /* pcrel_offset */
1050
1051 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1052 HOWTO (R_PPC_GOT_TLSGD16_HI,
1053 16, /* rightshift */
1054 1, /* size (0 = byte, 1 = short, 2 = long) */
1055 16, /* bitsize */
1056 FALSE, /* pc_relative */
1057 0, /* bitpos */
1058 complain_overflow_dont, /* complain_on_overflow */
1059 ppc_elf_unhandled_reloc, /* special_function */
1060 "R_PPC_GOT_TLSGD16_HI", /* name */
1061 FALSE, /* partial_inplace */
1062 0, /* src_mask */
1063 0xffff, /* dst_mask */
1064 FALSE), /* pcrel_offset */
1065
1066 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1067 HOWTO (R_PPC_GOT_TLSGD16_HA,
1068 16, /* rightshift */
1069 1, /* size (0 = byte, 1 = short, 2 = long) */
1070 16, /* bitsize */
1071 FALSE, /* pc_relative */
1072 0, /* bitpos */
1073 complain_overflow_dont, /* complain_on_overflow */
1074 ppc_elf_unhandled_reloc, /* special_function */
1075 "R_PPC_GOT_TLSGD16_HA", /* name */
1076 FALSE, /* partial_inplace */
1077 0, /* src_mask */
1078 0xffff, /* dst_mask */
1079 FALSE), /* pcrel_offset */
1080
1081 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1082 with values (sym+add)@dtpmod and zero, and computes the offset to the
1083 first entry. */
1084 HOWTO (R_PPC_GOT_TLSLD16,
1085 0, /* rightshift */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1087 16, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_signed, /* complain_on_overflow */
1091 ppc_elf_unhandled_reloc, /* special_function */
1092 "R_PPC_GOT_TLSLD16", /* name */
1093 FALSE, /* partial_inplace */
1094 0, /* src_mask */
1095 0xffff, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 /* Like GOT_TLSLD16, but no overflow. */
1099 HOWTO (R_PPC_GOT_TLSLD16_LO,
1100 0, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 16, /* bitsize */
1103 FALSE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_dont, /* complain_on_overflow */
1106 ppc_elf_unhandled_reloc, /* special_function */
1107 "R_PPC_GOT_TLSLD16_LO", /* name */
1108 FALSE, /* partial_inplace */
1109 0, /* src_mask */
1110 0xffff, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1112
1113 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1114 HOWTO (R_PPC_GOT_TLSLD16_HI,
1115 16, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_dont, /* complain_on_overflow */
1121 ppc_elf_unhandled_reloc, /* special_function */
1122 "R_PPC_GOT_TLSLD16_HI", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xffff, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1129 HOWTO (R_PPC_GOT_TLSLD16_HA,
1130 16, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc_elf_unhandled_reloc, /* special_function */
1137 "R_PPC_GOT_TLSLD16_HA", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xffff, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1144 the offset to the entry. */
1145 HOWTO (R_PPC_GOT_DTPREL16,
1146 0, /* rightshift */
1147 1, /* size (0 = byte, 1 = short, 2 = long) */
1148 16, /* bitsize */
1149 FALSE, /* pc_relative */
1150 0, /* bitpos */
1151 complain_overflow_signed, /* complain_on_overflow */
1152 ppc_elf_unhandled_reloc, /* special_function */
1153 "R_PPC_GOT_DTPREL16", /* name */
1154 FALSE, /* partial_inplace */
1155 0, /* src_mask */
1156 0xffff, /* dst_mask */
1157 FALSE), /* pcrel_offset */
1158
1159 /* Like GOT_DTPREL16, but no overflow. */
1160 HOWTO (R_PPC_GOT_DTPREL16_LO,
1161 0, /* rightshift */
1162 1, /* size (0 = byte, 1 = short, 2 = long) */
1163 16, /* bitsize */
1164 FALSE, /* pc_relative */
1165 0, /* bitpos */
1166 complain_overflow_dont, /* complain_on_overflow */
1167 ppc_elf_unhandled_reloc, /* special_function */
1168 "R_PPC_GOT_DTPREL16_LO", /* name */
1169 FALSE, /* partial_inplace */
1170 0, /* src_mask */
1171 0xffff, /* dst_mask */
1172 FALSE), /* pcrel_offset */
1173
1174 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1175 HOWTO (R_PPC_GOT_DTPREL16_HI,
1176 16, /* rightshift */
1177 1, /* size (0 = byte, 1 = short, 2 = long) */
1178 16, /* bitsize */
1179 FALSE, /* pc_relative */
1180 0, /* bitpos */
1181 complain_overflow_dont, /* complain_on_overflow */
1182 ppc_elf_unhandled_reloc, /* special_function */
1183 "R_PPC_GOT_DTPREL16_HI", /* name */
1184 FALSE, /* partial_inplace */
1185 0, /* src_mask */
1186 0xffff, /* dst_mask */
1187 FALSE), /* pcrel_offset */
1188
1189 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1190 HOWTO (R_PPC_GOT_DTPREL16_HA,
1191 16, /* rightshift */
1192 1, /* size (0 = byte, 1 = short, 2 = long) */
1193 16, /* bitsize */
1194 FALSE, /* pc_relative */
1195 0, /* bitpos */
1196 complain_overflow_dont, /* complain_on_overflow */
1197 ppc_elf_unhandled_reloc, /* special_function */
1198 "R_PPC_GOT_DTPREL16_HA", /* name */
1199 FALSE, /* partial_inplace */
1200 0, /* src_mask */
1201 0xffff, /* dst_mask */
1202 FALSE), /* pcrel_offset */
1203
1204 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1205 offset to the entry. */
1206 HOWTO (R_PPC_GOT_TPREL16,
1207 0, /* rightshift */
1208 1, /* size (0 = byte, 1 = short, 2 = long) */
1209 16, /* bitsize */
1210 FALSE, /* pc_relative */
1211 0, /* bitpos */
1212 complain_overflow_signed, /* complain_on_overflow */
1213 ppc_elf_unhandled_reloc, /* special_function */
1214 "R_PPC_GOT_TPREL16", /* name */
1215 FALSE, /* partial_inplace */
1216 0, /* src_mask */
1217 0xffff, /* dst_mask */
1218 FALSE), /* pcrel_offset */
1219
1220 /* Like GOT_TPREL16, but no overflow. */
1221 HOWTO (R_PPC_GOT_TPREL16_LO,
1222 0, /* rightshift */
1223 1, /* size (0 = byte, 1 = short, 2 = long) */
1224 16, /* bitsize */
1225 FALSE, /* pc_relative */
1226 0, /* bitpos */
1227 complain_overflow_dont, /* complain_on_overflow */
1228 ppc_elf_unhandled_reloc, /* special_function */
1229 "R_PPC_GOT_TPREL16_LO", /* name */
1230 FALSE, /* partial_inplace */
1231 0, /* src_mask */
1232 0xffff, /* dst_mask */
1233 FALSE), /* pcrel_offset */
1234
1235 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1236 HOWTO (R_PPC_GOT_TPREL16_HI,
1237 16, /* rightshift */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1239 16, /* bitsize */
1240 FALSE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_dont, /* complain_on_overflow */
1243 ppc_elf_unhandled_reloc, /* special_function */
1244 "R_PPC_GOT_TPREL16_HI", /* name */
1245 FALSE, /* partial_inplace */
1246 0, /* src_mask */
1247 0xffff, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1249
1250 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1251 HOWTO (R_PPC_GOT_TPREL16_HA,
1252 16, /* rightshift */
1253 1, /* size (0 = byte, 1 = short, 2 = long) */
1254 16, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 ppc_elf_unhandled_reloc, /* special_function */
1259 "R_PPC_GOT_TPREL16_HA", /* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0xffff, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 /* The remaining relocs are from the Embedded ELF ABI, and are not
1266 in the SVR4 ELF ABI. */
1267
1268 /* 32 bit value resulting from the addend minus the symbol. */
1269 HOWTO (R_PPC_EMB_NADDR32, /* type */
1270 0, /* rightshift */
1271 2, /* size (0 = byte, 1 = short, 2 = long) */
1272 32, /* bitsize */
1273 FALSE, /* pc_relative */
1274 0, /* bitpos */
1275 complain_overflow_dont, /* complain_on_overflow */
1276 ppc_elf_unhandled_reloc, /* special_function */
1277 "R_PPC_EMB_NADDR32", /* name */
1278 FALSE, /* partial_inplace */
1279 0, /* src_mask */
1280 0xffffffff, /* dst_mask */
1281 FALSE), /* pcrel_offset */
1282
1283 /* 16 bit value resulting from the addend minus the symbol. */
1284 HOWTO (R_PPC_EMB_NADDR16, /* type */
1285 0, /* rightshift */
1286 1, /* size (0 = byte, 1 = short, 2 = long) */
1287 16, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_signed, /* complain_on_overflow */
1291 ppc_elf_unhandled_reloc, /* special_function */
1292 "R_PPC_EMB_NADDR16", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 0xffff, /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* 16 bit value resulting from the addend minus the symbol. */
1299 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1300 0, /* rightshift */
1301 1, /* size (0 = byte, 1 = short, 2 = long) */
1302 16, /* bitsize */
1303 FALSE, /* pc_relative */
1304 0, /* bitpos */
1305 complain_overflow_dont,/* complain_on_overflow */
1306 ppc_elf_unhandled_reloc, /* special_function */
1307 "R_PPC_EMB_ADDR16_LO", /* name */
1308 FALSE, /* partial_inplace */
1309 0, /* src_mask */
1310 0xffff, /* dst_mask */
1311 FALSE), /* pcrel_offset */
1312
1313 /* The high order 16 bits of the addend minus the symbol. */
1314 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1315 16, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_dont, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_NADDR16_HI", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* The high order 16 bits of the result of the addend minus the address,
1329 plus 1 if the contents of the low 16 bits, treated as a signed number,
1330 is negative. */
1331 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1332 16, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_NADDR16_HA", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* 16 bit value resulting from allocating a 4 byte word to hold an
1346 address in the .sdata section, and returning the offset from
1347 _SDA_BASE_ for that relocation. */
1348 HOWTO (R_PPC_EMB_SDAI16, /* type */
1349 0, /* rightshift */
1350 1, /* size (0 = byte, 1 = short, 2 = long) */
1351 16, /* bitsize */
1352 FALSE, /* pc_relative */
1353 0, /* bitpos */
1354 complain_overflow_signed, /* complain_on_overflow */
1355 ppc_elf_unhandled_reloc, /* special_function */
1356 "R_PPC_EMB_SDAI16", /* name */
1357 FALSE, /* partial_inplace */
1358 0, /* src_mask */
1359 0xffff, /* dst_mask */
1360 FALSE), /* pcrel_offset */
1361
1362 /* 16 bit value resulting from allocating a 4 byte word to hold an
1363 address in the .sdata2 section, and returning the offset from
1364 _SDA2_BASE_ for that relocation. */
1365 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 FALSE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_signed, /* complain_on_overflow */
1372 ppc_elf_unhandled_reloc, /* special_function */
1373 "R_PPC_EMB_SDA2I16", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 FALSE), /* pcrel_offset */
1378
1379 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1380 small data items. */
1381 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1382 0, /* rightshift */
1383 1, /* size (0 = byte, 1 = short, 2 = long) */
1384 16, /* bitsize */
1385 FALSE, /* pc_relative */
1386 0, /* bitpos */
1387 complain_overflow_signed, /* complain_on_overflow */
1388 ppc_elf_unhandled_reloc, /* special_function */
1389 "R_PPC_EMB_SDA2REL", /* name */
1390 FALSE, /* partial_inplace */
1391 0, /* src_mask */
1392 0xffff, /* dst_mask */
1393 FALSE), /* pcrel_offset */
1394
1395 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1396 signed offset from the appropriate base, and filling in the register
1397 field with the appropriate register (0, 2, or 13). */
1398 HOWTO (R_PPC_EMB_SDA21, /* type */
1399 0, /* rightshift */
1400 2, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 FALSE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_signed, /* complain_on_overflow */
1405 ppc_elf_unhandled_reloc, /* special_function */
1406 "R_PPC_EMB_SDA21", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 FALSE), /* pcrel_offset */
1411
1412 /* Relocation not handled: R_PPC_EMB_MRKREF */
1413 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1414 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1415 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1416 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1417 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1418
1419 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1420 in the 16 bit signed offset from the appropriate base, and filling in the
1421 register field with the appropriate register (0, 2, or 13). */
1422 HOWTO (R_PPC_EMB_RELSDA, /* type */
1423 0, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_signed, /* complain_on_overflow */
1429 ppc_elf_unhandled_reloc, /* special_function */
1430 "R_PPC_EMB_RELSDA", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xffff, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* A relative 8 bit branch. */
1437 HOWTO (R_PPC_VLE_REL8, /* type */
1438 1, /* rightshift */
1439 1, /* size (0 = byte, 1 = short, 2 = long) */
1440 8, /* bitsize */
1441 TRUE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_signed, /* complain_on_overflow */
1444 bfd_elf_generic_reloc, /* special_function */
1445 "R_PPC_VLE_REL8", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 0xff, /* dst_mask */
1449 TRUE), /* pcrel_offset */
1450
1451 /* A relative 15 bit branch. */
1452 HOWTO (R_PPC_VLE_REL15, /* type */
1453 1, /* rightshift */
1454 2, /* size (0 = byte, 1 = short, 2 = long) */
1455 15, /* bitsize */
1456 TRUE, /* pc_relative */
1457 1, /* bitpos */
1458 complain_overflow_signed, /* complain_on_overflow */
1459 bfd_elf_generic_reloc, /* special_function */
1460 "R_PPC_VLE_REL15", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xfffe, /* dst_mask */
1464 TRUE), /* pcrel_offset */
1465
1466 /* A relative 24 bit branch. */
1467 HOWTO (R_PPC_VLE_REL24, /* type */
1468 1, /* rightshift */
1469 2, /* size (0 = byte, 1 = short, 2 = long) */
1470 24, /* bitsize */
1471 TRUE, /* pc_relative */
1472 1, /* bitpos */
1473 complain_overflow_signed, /* complain_on_overflow */
1474 bfd_elf_generic_reloc, /* special_function */
1475 "R_PPC_VLE_REL24", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 0x1fffffe, /* dst_mask */
1479 TRUE), /* pcrel_offset */
1480
1481 /* The 16 LSBS in split16a format. */
1482 HOWTO (R_PPC_VLE_LO16A, /* type */
1483 0, /* rightshift */
1484 2, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_dont, /* complain_on_overflow */
1489 ppc_elf_unhandled_reloc, /* special_function */
1490 "R_PPC_VLE_LO16A", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0x1f07ff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* The 16 LSBS in split16d format. */
1497 HOWTO (R_PPC_VLE_LO16D, /* type */
1498 0, /* rightshift */
1499 2, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc_elf_unhandled_reloc, /* special_function */
1505 "R_PPC_VLE_LO16D", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0x3e007ff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Bits 16-31 split16a format. */
1512 HOWTO (R_PPC_VLE_HI16A, /* type */
1513 16, /* rightshift */
1514 2, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc_elf_unhandled_reloc, /* special_function */
1520 "R_PPC_VLE_HI16A", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0x1f07ff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Bits 16-31 split16d format. */
1527 HOWTO (R_PPC_VLE_HI16D, /* type */
1528 16, /* rightshift */
1529 2, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc_elf_unhandled_reloc, /* special_function */
1535 "R_PPC_VLE_HI16D", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0x3e007ff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Bits 16-31 (High Adjusted) in split16a format. */
1542 HOWTO (R_PPC_VLE_HA16A, /* type */
1543 16, /* rightshift */
1544 2, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc_elf_unhandled_reloc, /* special_function */
1550 "R_PPC_VLE_HA16A", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0x1f07ff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Bits 16-31 (High Adjusted) in split16d format. */
1557 HOWTO (R_PPC_VLE_HA16D, /* type */
1558 16, /* rightshift */
1559 2, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc_elf_unhandled_reloc, /* special_function */
1565 "R_PPC_VLE_HA16D", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0x3e007ff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1572 instructions. If the register base is 0 then the linker changes
1573 the e_add16i to an e_li instruction. */
1574 HOWTO (R_PPC_VLE_SDA21, /* type */
1575 0, /* rightshift */
1576 2, /* size (0 = byte, 1 = short, 2 = long) */
1577 16, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_signed, /* complain_on_overflow */
1581 ppc_elf_unhandled_reloc, /* special_function */
1582 "R_PPC_VLE_SDA21", /* name */
1583 FALSE, /* partial_inplace */
1584 0, /* src_mask */
1585 0xffff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1589 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1590 0, /* rightshift */
1591 2, /* size (0 = byte, 1 = short, 2 = long) */
1592 16, /* bitsize */
1593 FALSE, /* pc_relative */
1594 0, /* bitpos */
1595 complain_overflow_dont, /* complain_on_overflow */
1596 ppc_elf_unhandled_reloc, /* special_function */
1597 "R_PPC_VLE_SDA21_LO", /* name */
1598 FALSE, /* partial_inplace */
1599 0, /* src_mask */
1600 0xffff, /* dst_mask */
1601 FALSE), /* pcrel_offset */
1602
1603 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1604 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1605 0, /* rightshift */
1606 2, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_dont, /* complain_on_overflow */
1611 ppc_elf_unhandled_reloc, /* special_function */
1612 "R_PPC_VLE_SDAREL_LO16A", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0x1f07ff, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1619 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1620 0, /* rightshift */
1621 2, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_dont, /* complain_on_overflow */
1626 ppc_elf_unhandled_reloc, /* special_function */
1627 "R_PPC_VLE_SDAREL_LO16D", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0x3e007ff, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1634 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1635 16, /* rightshift */
1636 2, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_dont, /* complain_on_overflow */
1641 ppc_elf_unhandled_reloc, /* special_function */
1642 "R_PPC_VLE_SDAREL_HI16A", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0x1f07ff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1649 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1650 16, /* rightshift */
1651 2, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc_elf_unhandled_reloc, /* special_function */
1657 "R_PPC_VLE_SDAREL_HI16D", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0x3e007ff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1664 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1665 16, /* rightshift */
1666 2, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc_elf_unhandled_reloc, /* special_function */
1672 "R_PPC_VLE_SDAREL_HA16A", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0x1f07ff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1679 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1680 16, /* rightshift */
1681 2, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc_elf_unhandled_reloc, /* special_function */
1687 "R_PPC_VLE_SDAREL_HA16D", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0x3e007ff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* e_li split20 format. */
1694 HOWTO (R_PPC_VLE_ADDR20, /* type */
1695 16, /* rightshift */
1696 2, /* size (0 = byte, 1 = short, 2 = long) */
1697 20, /* bitsize */
1698 FALSE, /* pc_relative */
1699 0, /* bitpos */
1700 complain_overflow_dont, /* complain_on_overflow */
1701 bfd_elf_generic_reloc, /* special_function */
1702 "R_PPC_VLE_ADDR20", /* name */
1703 FALSE, /* partial_inplace */
1704 0, /* src_mask */
1705 0x1f07ff, /* dst_mask */
1706 FALSE), /* pcrel_offset */
1707
1708 HOWTO (R_PPC_IRELATIVE, /* type */
1709 0, /* rightshift */
1710 2, /* size (0 = byte, 1 = short, 2 = long) */
1711 32, /* bitsize */
1712 FALSE, /* pc_relative */
1713 0, /* bitpos */
1714 complain_overflow_dont, /* complain_on_overflow */
1715 ppc_elf_unhandled_reloc, /* special_function */
1716 "R_PPC_IRELATIVE", /* name */
1717 FALSE, /* partial_inplace */
1718 0, /* src_mask */
1719 0xffffffff, /* dst_mask */
1720 FALSE), /* pcrel_offset */
1721
1722 /* A 16 bit relative relocation. */
1723 HOWTO (R_PPC_REL16, /* type */
1724 0, /* rightshift */
1725 1, /* size (0 = byte, 1 = short, 2 = long) */
1726 16, /* bitsize */
1727 TRUE, /* pc_relative */
1728 0, /* bitpos */
1729 complain_overflow_signed, /* complain_on_overflow */
1730 bfd_elf_generic_reloc, /* special_function */
1731 "R_PPC_REL16", /* name */
1732 FALSE, /* partial_inplace */
1733 0, /* src_mask */
1734 0xffff, /* dst_mask */
1735 TRUE), /* pcrel_offset */
1736
1737 /* A 16 bit relative relocation without overflow. */
1738 HOWTO (R_PPC_REL16_LO, /* type */
1739 0, /* rightshift */
1740 1, /* size (0 = byte, 1 = short, 2 = long) */
1741 16, /* bitsize */
1742 TRUE, /* pc_relative */
1743 0, /* bitpos */
1744 complain_overflow_dont,/* complain_on_overflow */
1745 bfd_elf_generic_reloc, /* special_function */
1746 "R_PPC_REL16_LO", /* name */
1747 FALSE, /* partial_inplace */
1748 0, /* src_mask */
1749 0xffff, /* dst_mask */
1750 TRUE), /* pcrel_offset */
1751
1752 /* The high order 16 bits of a relative address. */
1753 HOWTO (R_PPC_REL16_HI, /* type */
1754 16, /* rightshift */
1755 1, /* size (0 = byte, 1 = short, 2 = long) */
1756 16, /* bitsize */
1757 TRUE, /* pc_relative */
1758 0, /* bitpos */
1759 complain_overflow_dont, /* complain_on_overflow */
1760 bfd_elf_generic_reloc, /* special_function */
1761 "R_PPC_REL16_HI", /* name */
1762 FALSE, /* partial_inplace */
1763 0, /* src_mask */
1764 0xffff, /* dst_mask */
1765 TRUE), /* pcrel_offset */
1766
1767 /* The high order 16 bits of a relative address, plus 1 if the contents of
1768 the low 16 bits, treated as a signed number, is negative. */
1769 HOWTO (R_PPC_REL16_HA, /* type */
1770 16, /* rightshift */
1771 1, /* size (0 = byte, 1 = short, 2 = long) */
1772 16, /* bitsize */
1773 TRUE, /* pc_relative */
1774 0, /* bitpos */
1775 complain_overflow_dont, /* complain_on_overflow */
1776 ppc_elf_addr16_ha_reloc, /* special_function */
1777 "R_PPC_REL16_HA", /* name */
1778 FALSE, /* partial_inplace */
1779 0, /* src_mask */
1780 0xffff, /* dst_mask */
1781 TRUE), /* pcrel_offset */
1782
1783 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1784 HOWTO (R_PPC_REL16DX_HA, /* type */
1785 16, /* rightshift */
1786 2, /* size (0 = byte, 1 = short, 2 = long) */
1787 16, /* bitsize */
1788 TRUE, /* pc_relative */
1789 0, /* bitpos */
1790 complain_overflow_signed, /* complain_on_overflow */
1791 ppc_elf_addr16_ha_reloc, /* special_function */
1792 "R_PPC_REL16DX_HA", /* name */
1793 FALSE, /* partial_inplace */
1794 0, /* src_mask */
1795 0x1fffc1, /* dst_mask */
1796 TRUE), /* pcrel_offset */
1797
1798 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1799 HOWTO (R_PPC_16DX_HA, /* type */
1800 16, /* rightshift */
1801 2, /* size (0 = byte, 1 = short, 2 = long) */
1802 16, /* bitsize */
1803 FALSE, /* pc_relative */
1804 0, /* bitpos */
1805 complain_overflow_signed, /* complain_on_overflow */
1806 ppc_elf_addr16_ha_reloc, /* special_function */
1807 "R_PPC_16DX_HA", /* name */
1808 FALSE, /* partial_inplace */
1809 0, /* src_mask */
1810 0x1fffc1, /* dst_mask */
1811 FALSE), /* pcrel_offset */
1812
1813 /* GNU extension to record C++ vtable hierarchy. */
1814 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1815 0, /* rightshift */
1816 0, /* size (0 = byte, 1 = short, 2 = long) */
1817 0, /* bitsize */
1818 FALSE, /* pc_relative */
1819 0, /* bitpos */
1820 complain_overflow_dont, /* complain_on_overflow */
1821 NULL, /* special_function */
1822 "R_PPC_GNU_VTINHERIT", /* name */
1823 FALSE, /* partial_inplace */
1824 0, /* src_mask */
1825 0, /* dst_mask */
1826 FALSE), /* pcrel_offset */
1827
1828 /* GNU extension to record C++ vtable member usage. */
1829 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1830 0, /* rightshift */
1831 0, /* size (0 = byte, 1 = short, 2 = long) */
1832 0, /* bitsize */
1833 FALSE, /* pc_relative */
1834 0, /* bitpos */
1835 complain_overflow_dont, /* complain_on_overflow */
1836 NULL, /* special_function */
1837 "R_PPC_GNU_VTENTRY", /* name */
1838 FALSE, /* partial_inplace */
1839 0, /* src_mask */
1840 0, /* dst_mask */
1841 FALSE), /* pcrel_offset */
1842
1843 /* Phony reloc to handle AIX style TOC entries. */
1844 HOWTO (R_PPC_TOC16, /* type */
1845 0, /* rightshift */
1846 1, /* size (0 = byte, 1 = short, 2 = long) */
1847 16, /* bitsize */
1848 FALSE, /* pc_relative */
1849 0, /* bitpos */
1850 complain_overflow_signed, /* complain_on_overflow */
1851 ppc_elf_unhandled_reloc, /* special_function */
1852 "R_PPC_TOC16", /* name */
1853 FALSE, /* partial_inplace */
1854 0, /* src_mask */
1855 0xffff, /* dst_mask */
1856 FALSE), /* pcrel_offset */
1857 };
1858 \f
1859 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1860
1861 static void
1862 ppc_elf_howto_init (void)
1863 {
1864 unsigned int i, type;
1865
1866 for (i = 0;
1867 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1868 i++)
1869 {
1870 type = ppc_elf_howto_raw[i].type;
1871 if (type >= (sizeof (ppc_elf_howto_table)
1872 / sizeof (ppc_elf_howto_table[0])))
1873 abort ();
1874 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1875 }
1876 }
1877
1878 static reloc_howto_type *
1879 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1880 bfd_reloc_code_real_type code)
1881 {
1882 enum elf_ppc_reloc_type r;
1883
1884 /* Initialize howto table if not already done. */
1885 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1886 ppc_elf_howto_init ();
1887
1888 switch (code)
1889 {
1890 default:
1891 return NULL;
1892
1893 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1894 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1895 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1896 case BFD_RELOC_PPC64_ADDR16_DS:
1897 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1898 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1899 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1900 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1901 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1902 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1903 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1904 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1905 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1906 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1907 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1908 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1909 case BFD_RELOC_PPC64_GOT16_DS:
1910 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1911 case BFD_RELOC_PPC64_GOT16_LO_DS:
1912 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1913 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1914 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1915 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1916 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1917 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1918 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1919 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1920 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1921 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1922 case BFD_RELOC_PPC64_PLT16_LO_DS:
1923 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1924 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1925 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1926 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1927 case BFD_RELOC_PPC64_SECTOFF_DS:
1928 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1929 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1930 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1931 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1932 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1933 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1934 case BFD_RELOC_PPC64_TOC16_DS:
1935 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1936 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1937 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1938 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1939 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1940 case BFD_RELOC_PPC64_TPREL16_DS:
1941 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1942 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1943 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1944 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1945 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1946 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1947 case BFD_RELOC_PPC64_DTPREL16_DS:
1948 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1949 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1950 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1951 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1952 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1953 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1954 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1955 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1956 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1957 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1958 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1959 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1960 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1961 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1962 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1963 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1964 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1965 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1966 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1967 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1968 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1969 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1970 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1971 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1972 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1973 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1974 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1975 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1976 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1977 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1978 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1979 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1980 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1981 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1982 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1983 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1984 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1985 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1986 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1987 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1988 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1989 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1990 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1991 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1992 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1993 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1994 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1995 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1996 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1997 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1998 r = R_PPC_VLE_SDAREL_LO16A;
1999 break;
2000 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
2001 r = R_PPC_VLE_SDAREL_LO16D;
2002 break;
2003 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
2004 r = R_PPC_VLE_SDAREL_HI16A;
2005 break;
2006 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
2007 r = R_PPC_VLE_SDAREL_HI16D;
2008 break;
2009 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
2010 r = R_PPC_VLE_SDAREL_HA16A;
2011 break;
2012 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
2013 r = R_PPC_VLE_SDAREL_HA16D;
2014 break;
2015 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2016 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2017 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2018 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2019 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
2020 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2021 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2022 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2023 }
2024
2025 return ppc_elf_howto_table[r];
2026 };
2027
2028 static reloc_howto_type *
2029 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2030 const char *r_name)
2031 {
2032 unsigned int i;
2033
2034 for (i = 0;
2035 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2036 i++)
2037 if (ppc_elf_howto_raw[i].name != NULL
2038 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2039 return &ppc_elf_howto_raw[i];
2040
2041 return NULL;
2042 }
2043
2044 /* Set the howto pointer for a PowerPC ELF reloc. */
2045
2046 static bfd_boolean
2047 ppc_elf_info_to_howto (bfd *abfd,
2048 arelent *cache_ptr,
2049 Elf_Internal_Rela *dst)
2050 {
2051 unsigned int r_type;
2052
2053 /* Initialize howto table if not already done. */
2054 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2055 ppc_elf_howto_init ();
2056
2057 r_type = ELF32_R_TYPE (dst->r_info);
2058 if (r_type >= R_PPC_max)
2059 {
2060 /* xgettext:c-format */
2061 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2062 abfd, r_type);
2063 bfd_set_error (bfd_error_bad_value);
2064 return FALSE;
2065 }
2066
2067 cache_ptr->howto = ppc_elf_howto_table[r_type];
2068
2069 /* Just because the above assert didn't trigger doesn't mean that
2070 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2071 if (cache_ptr->howto == NULL)
2072 {
2073 /* xgettext:c-format */
2074 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2075 abfd, r_type);
2076 bfd_set_error (bfd_error_bad_value);
2077
2078 return FALSE;
2079 }
2080
2081 return TRUE;
2082 }
2083
2084 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2085
2086 static bfd_reloc_status_type
2087 ppc_elf_addr16_ha_reloc (bfd *abfd,
2088 arelent *reloc_entry,
2089 asymbol *symbol,
2090 void *data,
2091 asection *input_section,
2092 bfd *output_bfd,
2093 char **error_message ATTRIBUTE_UNUSED)
2094 {
2095 enum elf_ppc_reloc_type r_type;
2096 long insn;
2097 bfd_size_type octets;
2098 bfd_vma value;
2099
2100 if (output_bfd != NULL)
2101 {
2102 reloc_entry->address += input_section->output_offset;
2103 return bfd_reloc_ok;
2104 }
2105
2106 reloc_entry->addend += 0x8000;
2107 r_type = reloc_entry->howto->type;
2108 if (r_type != R_PPC_REL16DX_HA)
2109 return bfd_reloc_continue;
2110
2111 value = 0;
2112 if (!bfd_is_com_section (symbol->section))
2113 value = symbol->value;
2114 value += (reloc_entry->addend
2115 + symbol->section->output_offset
2116 + symbol->section->output_section->vma);
2117 value -= (reloc_entry->address
2118 + input_section->output_offset
2119 + input_section->output_section->vma);
2120 value >>= 16;
2121
2122 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2123 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2124 insn &= ~0x1fffc1;
2125 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2126 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2127 return bfd_reloc_ok;
2128 }
2129
2130 static bfd_reloc_status_type
2131 ppc_elf_unhandled_reloc (bfd *abfd,
2132 arelent *reloc_entry,
2133 asymbol *symbol,
2134 void *data,
2135 asection *input_section,
2136 bfd *output_bfd,
2137 char **error_message)
2138 {
2139 /* If this is a relocatable link (output_bfd test tells us), just
2140 call the generic function. Any adjustment will be done at final
2141 link time. */
2142 if (output_bfd != NULL)
2143 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2144 input_section, output_bfd, error_message);
2145
2146 if (error_message != NULL)
2147 {
2148 static char buf[60];
2149 sprintf (buf, _("generic linker can't handle %s"),
2150 reloc_entry->howto->name);
2151 *error_message = buf;
2152 }
2153 return bfd_reloc_dangerous;
2154 }
2155 \f
2156 /* Sections created by the linker. */
2157
2158 typedef struct elf_linker_section
2159 {
2160 /* Pointer to the bfd section. */
2161 asection *section;
2162 /* Section name. */
2163 const char *name;
2164 /* Associated bss section name. */
2165 const char *bss_name;
2166 /* Associated symbol name. */
2167 const char *sym_name;
2168 /* Associated symbol. */
2169 struct elf_link_hash_entry *sym;
2170 } elf_linker_section_t;
2171
2172 /* Linked list of allocated pointer entries. This hangs off of the
2173 symbol lists, and provides allows us to return different pointers,
2174 based on different addend's. */
2175
2176 typedef struct elf_linker_section_pointers
2177 {
2178 /* next allocated pointer for this symbol */
2179 struct elf_linker_section_pointers *next;
2180 /* offset of pointer from beginning of section */
2181 bfd_vma offset;
2182 /* addend used */
2183 bfd_vma addend;
2184 /* which linker section this is */
2185 elf_linker_section_t *lsect;
2186 } elf_linker_section_pointers_t;
2187
2188 struct ppc_elf_obj_tdata
2189 {
2190 struct elf_obj_tdata elf;
2191
2192 /* A mapping from local symbols to offsets into the various linker
2193 sections added. This is index by the symbol index. */
2194 elf_linker_section_pointers_t **linker_section_pointers;
2195
2196 /* Flags used to auto-detect plt type. */
2197 unsigned int makes_plt_call : 1;
2198 unsigned int has_rel16 : 1;
2199 };
2200
2201 #define ppc_elf_tdata(bfd) \
2202 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2203
2204 #define elf_local_ptr_offsets(bfd) \
2205 (ppc_elf_tdata (bfd)->linker_section_pointers)
2206
2207 #define is_ppc_elf(bfd) \
2208 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2209 && elf_object_id (bfd) == PPC32_ELF_DATA)
2210
2211 /* Override the generic function because we store some extras. */
2212
2213 static bfd_boolean
2214 ppc_elf_mkobject (bfd *abfd)
2215 {
2216 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2217 PPC32_ELF_DATA);
2218 }
2219
2220 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2221
2222 bfd_boolean
2223 _bfd_elf_ppc_set_arch (bfd *abfd)
2224 {
2225 unsigned long mach = 0;
2226 asection *s;
2227 unsigned char *contents;
2228
2229 if (abfd->arch_info->bits_per_word == 32
2230 && bfd_big_endian (abfd))
2231 {
2232
2233 for (s = abfd->sections; s != NULL; s = s->next)
2234 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2235 break;
2236 if (s != NULL)
2237 mach = bfd_mach_ppc_vle;
2238 }
2239
2240 if (mach == 0)
2241 {
2242 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2243 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2244 {
2245 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2246 unsigned int i;
2247
2248 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2249 {
2250 unsigned int val = bfd_get_32 (abfd, contents + i);
2251 switch (val >> 16)
2252 {
2253 case PPC_APUINFO_PMR:
2254 case PPC_APUINFO_RFMCI:
2255 if (mach == 0)
2256 mach = bfd_mach_ppc_titan;
2257 break;
2258
2259 case PPC_APUINFO_ISEL:
2260 case PPC_APUINFO_CACHELCK:
2261 if (mach == bfd_mach_ppc_titan)
2262 mach = bfd_mach_ppc_e500mc;
2263 break;
2264
2265 case PPC_APUINFO_SPE:
2266 case PPC_APUINFO_EFS:
2267 case PPC_APUINFO_BRLOCK:
2268 if (mach != bfd_mach_ppc_vle)
2269 mach = bfd_mach_ppc_e500;
2270 break;
2271
2272 case PPC_APUINFO_VLE:
2273 mach = bfd_mach_ppc_vle;
2274 break;
2275
2276 default:
2277 mach = -1ul;
2278 }
2279 }
2280 free (contents);
2281 }
2282 }
2283
2284 if (mach != 0 && mach != -1ul)
2285 {
2286 const bfd_arch_info_type *arch;
2287
2288 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2289 if (arch->mach == mach)
2290 {
2291 abfd->arch_info = arch;
2292 break;
2293 }
2294 }
2295 return TRUE;
2296 }
2297
2298 /* Fix bad default arch selected for a 32 bit input bfd when the
2299 default is 64 bit. Also select arch based on apuinfo. */
2300
2301 static bfd_boolean
2302 ppc_elf_object_p (bfd *abfd)
2303 {
2304 if (!abfd->arch_info->the_default)
2305 return TRUE;
2306
2307 if (abfd->arch_info->bits_per_word == 64)
2308 {
2309 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2310
2311 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2312 {
2313 /* Relies on arch after 64 bit default being 32 bit default. */
2314 abfd->arch_info = abfd->arch_info->next;
2315 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2316 }
2317 }
2318 return _bfd_elf_ppc_set_arch (abfd);
2319 }
2320
2321 /* Function to set whether a module needs the -mrelocatable bit set. */
2322
2323 static bfd_boolean
2324 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2325 {
2326 BFD_ASSERT (!elf_flags_init (abfd)
2327 || elf_elfheader (abfd)->e_flags == flags);
2328
2329 elf_elfheader (abfd)->e_flags = flags;
2330 elf_flags_init (abfd) = TRUE;
2331 return TRUE;
2332 }
2333
2334 /* Support for core dump NOTE sections. */
2335
2336 static bfd_boolean
2337 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2338 {
2339 int offset;
2340 unsigned int size;
2341
2342 switch (note->descsz)
2343 {
2344 default:
2345 return FALSE;
2346
2347 case 268: /* Linux/PPC. */
2348 /* pr_cursig */
2349 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2350
2351 /* pr_pid */
2352 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2353
2354 /* pr_reg */
2355 offset = 72;
2356 size = 192;
2357
2358 break;
2359 }
2360
2361 /* Make a ".reg/999" section. */
2362 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2363 size, note->descpos + offset);
2364 }
2365
2366 static bfd_boolean
2367 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2368 {
2369 switch (note->descsz)
2370 {
2371 default:
2372 return FALSE;
2373
2374 case 128: /* Linux/PPC elf_prpsinfo. */
2375 elf_tdata (abfd)->core->pid
2376 = bfd_get_32 (abfd, note->descdata + 16);
2377 elf_tdata (abfd)->core->program
2378 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2379 elf_tdata (abfd)->core->command
2380 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2381 }
2382
2383 /* Note that for some reason, a spurious space is tacked
2384 onto the end of the args in some (at least one anyway)
2385 implementations, so strip it off if it exists. */
2386
2387 {
2388 char *command = elf_tdata (abfd)->core->command;
2389 int n = strlen (command);
2390
2391 if (0 < n && command[n - 1] == ' ')
2392 command[n - 1] = '\0';
2393 }
2394
2395 return TRUE;
2396 }
2397
2398 static char *
2399 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2400 {
2401 switch (note_type)
2402 {
2403 default:
2404 return NULL;
2405
2406 case NT_PRPSINFO:
2407 {
2408 char data[128] ATTRIBUTE_NONSTRING;
2409 va_list ap;
2410
2411 va_start (ap, note_type);
2412 memset (data, 0, sizeof (data));
2413 strncpy (data + 32, va_arg (ap, const char *), 16);
2414 DIAGNOSTIC_PUSH;
2415 /* GCC 8.1 warns about 80 equals destination size with
2416 -Wstringop-truncation:
2417 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
2418 */
2419 #if GCC_VERSION == 8001
2420 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
2421 #endif
2422 strncpy (data + 48, va_arg (ap, const char *), 80);
2423 DIAGNOSTIC_POP;
2424 va_end (ap);
2425 return elfcore_write_note (abfd, buf, bufsiz,
2426 "CORE", note_type, data, sizeof (data));
2427 }
2428
2429 case NT_PRSTATUS:
2430 {
2431 char data[268];
2432 va_list ap;
2433 long pid;
2434 int cursig;
2435 const void *greg;
2436
2437 va_start (ap, note_type);
2438 memset (data, 0, 72);
2439 pid = va_arg (ap, long);
2440 bfd_put_32 (abfd, pid, data + 24);
2441 cursig = va_arg (ap, int);
2442 bfd_put_16 (abfd, cursig, data + 12);
2443 greg = va_arg (ap, const void *);
2444 memcpy (data + 72, greg, 192);
2445 memset (data + 264, 0, 4);
2446 va_end (ap);
2447 return elfcore_write_note (abfd, buf, bufsiz,
2448 "CORE", note_type, data, sizeof (data));
2449 }
2450 }
2451 }
2452
2453 static flagword
2454 ppc_elf_lookup_section_flags (char *flag_name)
2455 {
2456
2457 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2458 return SHF_PPC_VLE;
2459
2460 return 0;
2461 }
2462
2463 /* Return address for Ith PLT stub in section PLT, for relocation REL
2464 or (bfd_vma) -1 if it should not be included. */
2465
2466 static bfd_vma
2467 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2468 const asection *plt ATTRIBUTE_UNUSED,
2469 const arelent *rel)
2470 {
2471 return rel->address;
2472 }
2473
2474 /* Handle a PowerPC specific section when reading an object file. This
2475 is called when bfd_section_from_shdr finds a section with an unknown
2476 type. */
2477
2478 static bfd_boolean
2479 ppc_elf_section_from_shdr (bfd *abfd,
2480 Elf_Internal_Shdr *hdr,
2481 const char *name,
2482 int shindex)
2483 {
2484 asection *newsect;
2485 flagword flags;
2486
2487 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2488 return FALSE;
2489
2490 newsect = hdr->bfd_section;
2491 flags = bfd_get_section_flags (abfd, newsect);
2492 if (hdr->sh_flags & SHF_EXCLUDE)
2493 flags |= SEC_EXCLUDE;
2494
2495 if (hdr->sh_type == SHT_ORDERED)
2496 flags |= SEC_SORT_ENTRIES;
2497
2498 bfd_set_section_flags (abfd, newsect, flags);
2499 return TRUE;
2500 }
2501
2502 /* Set up any other section flags and such that may be necessary. */
2503
2504 static bfd_boolean
2505 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2506 Elf_Internal_Shdr *shdr,
2507 asection *asect)
2508 {
2509 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2510 shdr->sh_type = SHT_ORDERED;
2511
2512 return TRUE;
2513 }
2514
2515 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2516 need to bump up the number of section headers. */
2517
2518 static int
2519 ppc_elf_additional_program_headers (bfd *abfd,
2520 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2521 {
2522 asection *s;
2523 int ret = 0;
2524
2525 s = bfd_get_section_by_name (abfd, ".sbss2");
2526 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2527 ++ret;
2528
2529 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2530 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2531 ++ret;
2532
2533 return ret;
2534 }
2535
2536 /* Modify the segment map for VLE executables. */
2537
2538 bfd_boolean
2539 ppc_elf_modify_segment_map (bfd *abfd,
2540 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2541 {
2542 struct elf_segment_map *m;
2543
2544 /* At this point in the link, output sections have already been sorted by
2545 LMA and assigned to segments. All that is left to do is to ensure
2546 there is no mixing of VLE & non-VLE sections in a text segment.
2547 If we find that case, we split the segment.
2548 We maintain the original output section order. */
2549
2550 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2551 {
2552 struct elf_segment_map *n;
2553 bfd_size_type amt;
2554 unsigned int j, k;
2555 unsigned int p_flags;
2556
2557 if (m->p_type != PT_LOAD || m->count == 0)
2558 continue;
2559
2560 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2561 {
2562 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2563 p_flags |= PF_W;
2564 if ((m->sections[j]->flags & SEC_CODE) != 0)
2565 {
2566 p_flags |= PF_X;
2567 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2568 p_flags |= PF_PPC_VLE;
2569 break;
2570 }
2571 }
2572 if (j != m->count)
2573 while (++j != m->count)
2574 {
2575 unsigned int p_flags1 = PF_R;
2576
2577 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2578 p_flags1 |= PF_W;
2579 if ((m->sections[j]->flags & SEC_CODE) != 0)
2580 {
2581 p_flags1 |= PF_X;
2582 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2583 p_flags1 |= PF_PPC_VLE;
2584 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2585 break;
2586 }
2587 p_flags |= p_flags1;
2588 }
2589 /* If we're splitting a segment which originally contained rw
2590 sections then those sections might now only be in one of the
2591 two parts. So always set p_flags if splitting, even if we
2592 are being called for objcopy with p_flags_valid set. */
2593 if (j != m->count || !m->p_flags_valid)
2594 {
2595 m->p_flags_valid = 1;
2596 m->p_flags = p_flags;
2597 }
2598 if (j == m->count)
2599 continue;
2600
2601 /* Sections 0..j-1 stay in this (current) segment,
2602 the remainder are put in a new segment.
2603 The scan resumes with the new segment. */
2604
2605 amt = sizeof (struct elf_segment_map);
2606 amt += (m->count - j - 1) * sizeof (asection *);
2607 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2608 if (n == NULL)
2609 return FALSE;
2610
2611 n->p_type = PT_LOAD;
2612 n->count = m->count - j;
2613 for (k = 0; k < n->count; ++k)
2614 n->sections[k] = m->sections[j + k];
2615 m->count = j;
2616 m->p_size_valid = 0;
2617 n->next = m->next;
2618 m->next = n;
2619 }
2620
2621 return TRUE;
2622 }
2623
2624 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2625 .PPC.EMB.sbss0 a normal section, and not a bss section so
2626 that the linker doesn't crater when trying to make more than
2627 2 sections. */
2628
2629 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2630 {
2631 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2632 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2633 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2634 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2635 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2636 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2637 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2638 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2639 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2640 { NULL, 0, 0, 0, 0 }
2641 };
2642
2643 /* This is what we want for new plt/got. */
2644 static struct bfd_elf_special_section ppc_alt_plt =
2645 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2646
2647 static const struct bfd_elf_special_section *
2648 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2649 {
2650 const struct bfd_elf_special_section *ssect;
2651
2652 /* See if this is one of the special sections. */
2653 if (sec->name == NULL)
2654 return NULL;
2655
2656 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2657 sec->use_rela_p);
2658 if (ssect != NULL)
2659 {
2660 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2661 ssect = &ppc_alt_plt;
2662 return ssect;
2663 }
2664
2665 return _bfd_elf_get_sec_type_attr (abfd, sec);
2666 }
2667 \f
2668 /* Very simple linked list structure for recording apuinfo values. */
2669 typedef struct apuinfo_list
2670 {
2671 struct apuinfo_list *next;
2672 unsigned long value;
2673 }
2674 apuinfo_list;
2675
2676 static apuinfo_list *head;
2677 static bfd_boolean apuinfo_set;
2678
2679 static void
2680 apuinfo_list_init (void)
2681 {
2682 head = NULL;
2683 apuinfo_set = FALSE;
2684 }
2685
2686 static void
2687 apuinfo_list_add (unsigned long value)
2688 {
2689 apuinfo_list *entry = head;
2690
2691 while (entry != NULL)
2692 {
2693 if (entry->value == value)
2694 return;
2695 entry = entry->next;
2696 }
2697
2698 entry = bfd_malloc (sizeof (* entry));
2699 if (entry == NULL)
2700 return;
2701
2702 entry->value = value;
2703 entry->next = head;
2704 head = entry;
2705 }
2706
2707 static unsigned
2708 apuinfo_list_length (void)
2709 {
2710 apuinfo_list *entry;
2711 unsigned long count;
2712
2713 for (entry = head, count = 0;
2714 entry;
2715 entry = entry->next)
2716 ++ count;
2717
2718 return count;
2719 }
2720
2721 static inline unsigned long
2722 apuinfo_list_element (unsigned long number)
2723 {
2724 apuinfo_list * entry;
2725
2726 for (entry = head;
2727 entry && number --;
2728 entry = entry->next)
2729 ;
2730
2731 return entry ? entry->value : 0;
2732 }
2733
2734 static void
2735 apuinfo_list_finish (void)
2736 {
2737 apuinfo_list *entry;
2738
2739 for (entry = head; entry;)
2740 {
2741 apuinfo_list *next = entry->next;
2742 free (entry);
2743 entry = next;
2744 }
2745
2746 head = NULL;
2747 }
2748
2749 /* Scan the input BFDs and create a linked list of
2750 the APUinfo values that will need to be emitted. */
2751
2752 static void
2753 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2754 {
2755 bfd *ibfd;
2756 asection *asec;
2757 char *buffer = NULL;
2758 bfd_size_type largest_input_size = 0;
2759 unsigned i;
2760 unsigned long length;
2761 const char *error_message = NULL;
2762
2763 if (link_info == NULL)
2764 return;
2765
2766 apuinfo_list_init ();
2767
2768 /* Read in the input sections contents. */
2769 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2770 {
2771 unsigned long datum;
2772
2773 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2774 if (asec == NULL)
2775 continue;
2776
2777 /* xgettext:c-format */
2778 error_message = _("corrupt %s section in %pB");
2779 length = asec->size;
2780 if (length < 20)
2781 goto fail;
2782
2783 apuinfo_set = TRUE;
2784 if (largest_input_size < asec->size)
2785 {
2786 if (buffer)
2787 free (buffer);
2788 largest_input_size = asec->size;
2789 buffer = bfd_malloc (largest_input_size);
2790 if (!buffer)
2791 return;
2792 }
2793
2794 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2795 || (bfd_bread (buffer, length, ibfd) != length))
2796 {
2797 /* xgettext:c-format */
2798 error_message = _("unable to read in %s section from %pB");
2799 goto fail;
2800 }
2801
2802 /* Verify the contents of the header. Note - we have to
2803 extract the values this way in order to allow for a
2804 host whose endian-ness is different from the target. */
2805 datum = bfd_get_32 (ibfd, buffer);
2806 if (datum != sizeof APUINFO_LABEL)
2807 goto fail;
2808
2809 datum = bfd_get_32 (ibfd, buffer + 8);
2810 if (datum != 0x2)
2811 goto fail;
2812
2813 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2814 goto fail;
2815
2816 /* Get the number of bytes used for apuinfo entries. */
2817 datum = bfd_get_32 (ibfd, buffer + 4);
2818 if (datum + 20 != length)
2819 goto fail;
2820
2821 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2822 for (i = 0; i < datum; i += 4)
2823 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2824 }
2825
2826 error_message = NULL;
2827
2828 if (apuinfo_set)
2829 {
2830 /* Compute the size of the output section. */
2831 unsigned num_entries = apuinfo_list_length ();
2832
2833 /* Set the output section size, if it exists. */
2834 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2835
2836 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2837 {
2838 ibfd = abfd;
2839 /* xgettext:c-format */
2840 error_message = _("warning: unable to set size of %s section in %pB");
2841 }
2842 }
2843
2844 fail:
2845 if (buffer)
2846 free (buffer);
2847
2848 if (error_message)
2849 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
2850 }
2851
2852 /* Prevent the output section from accumulating the input sections'
2853 contents. We have already stored this in our linked list structure. */
2854
2855 static bfd_boolean
2856 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2857 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2858 asection *asec,
2859 bfd_byte *contents ATTRIBUTE_UNUSED)
2860 {
2861 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2862 }
2863
2864 /* Finally we can generate the output section. */
2865
2866 static void
2867 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2868 {
2869 bfd_byte *buffer;
2870 asection *asec;
2871 unsigned i;
2872 unsigned num_entries;
2873 bfd_size_type length;
2874
2875 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2876 if (asec == NULL)
2877 return;
2878
2879 if (!apuinfo_set)
2880 return;
2881
2882 length = asec->size;
2883 if (length < 20)
2884 return;
2885
2886 buffer = bfd_malloc (length);
2887 if (buffer == NULL)
2888 {
2889 _bfd_error_handler
2890 (_("failed to allocate space for new APUinfo section"));
2891 return;
2892 }
2893
2894 /* Create the apuinfo header. */
2895 num_entries = apuinfo_list_length ();
2896 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2897 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2898 bfd_put_32 (abfd, 0x2, buffer + 8);
2899 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2900
2901 length = 20;
2902 for (i = 0; i < num_entries; i++)
2903 {
2904 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2905 length += 4;
2906 }
2907
2908 if (length != asec->size)
2909 _bfd_error_handler (_("failed to compute new APUinfo section"));
2910
2911 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2912 _bfd_error_handler (_("failed to install new APUinfo section"));
2913
2914 free (buffer);
2915
2916 apuinfo_list_finish ();
2917 }
2918 \f
2919 static bfd_boolean
2920 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2921 {
2922 bfd_byte buf[4 * 4];
2923
2924 if (!bfd_get_section_contents (abfd, glink, buf, off, sizeof buf))
2925 return FALSE;
2926
2927 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2928 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2929 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2930 && bfd_get_32 (abfd, buf + 12) == BCTR);
2931 }
2932
2933 static bfd_boolean
2934 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2935 {
2936 bfd_vma vma = *(bfd_vma *) ptr;
2937 return ((section->flags & SEC_ALLOC) != 0
2938 && section->vma <= vma
2939 && vma < section->vma + section->size);
2940 }
2941
2942 static long
2943 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2944 long dynsymcount, asymbol **dynsyms,
2945 asymbol **ret)
2946 {
2947 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2948 asection *plt, *relplt, *dynamic, *glink;
2949 bfd_vma glink_vma = 0;
2950 bfd_vma resolv_vma = 0;
2951 bfd_vma stub_off;
2952 asymbol *s;
2953 arelent *p;
2954 long count, i, stub_delta;
2955 size_t size;
2956 char *names;
2957 bfd_byte buf[4];
2958
2959 *ret = NULL;
2960
2961 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2962 return 0;
2963
2964 if (dynsymcount <= 0)
2965 return 0;
2966
2967 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2968 if (relplt == NULL)
2969 return 0;
2970
2971 plt = bfd_get_section_by_name (abfd, ".plt");
2972 if (plt == NULL)
2973 return 0;
2974
2975 /* Call common code to handle old-style executable PLTs. */
2976 if (elf_section_flags (plt) & SHF_EXECINSTR)
2977 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2978 dynsymcount, dynsyms, ret);
2979
2980 /* If this object was prelinked, the prelinker stored the address
2981 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2982 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2983 if (dynamic != NULL)
2984 {
2985 bfd_byte *dynbuf, *extdyn, *extdynend;
2986 size_t extdynsize;
2987 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2988
2989 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2990 return -1;
2991
2992 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2993 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2994
2995 extdyn = dynbuf;
2996 extdynend = extdyn + dynamic->size;
2997 for (; extdyn < extdynend; extdyn += extdynsize)
2998 {
2999 Elf_Internal_Dyn dyn;
3000 (*swap_dyn_in) (abfd, extdyn, &dyn);
3001
3002 if (dyn.d_tag == DT_NULL)
3003 break;
3004
3005 if (dyn.d_tag == DT_PPC_GOT)
3006 {
3007 unsigned int g_o_t = dyn.d_un.d_val;
3008 asection *got = bfd_get_section_by_name (abfd, ".got");
3009 if (got != NULL
3010 && bfd_get_section_contents (abfd, got, buf,
3011 g_o_t - got->vma + 4, 4))
3012 glink_vma = bfd_get_32 (abfd, buf);
3013 break;
3014 }
3015 }
3016 free (dynbuf);
3017 }
3018
3019 /* Otherwise we read the first plt entry. */
3020 if (glink_vma == 0)
3021 {
3022 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3023 glink_vma = bfd_get_32 (abfd, buf);
3024 }
3025
3026 if (glink_vma == 0)
3027 return 0;
3028
3029 /* The .glink section usually does not survive the final
3030 link; search for the section (usually .text) where the
3031 glink stubs now reside. */
3032 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3033 if (glink == NULL)
3034 return 0;
3035
3036 /* Determine glink PLT resolver by reading the relative branch
3037 from the first glink stub. */
3038 if (bfd_get_section_contents (abfd, glink, buf,
3039 glink_vma - glink->vma, 4))
3040 {
3041 unsigned int insn = bfd_get_32 (abfd, buf);
3042
3043 /* The first glink stub may either branch to the resolver ... */
3044 insn ^= B;
3045 if ((insn & ~0x3fffffc) == 0)
3046 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3047
3048 /* ... or fall through a bunch of NOPs. */
3049 else if ((insn ^ B ^ NOP) == 0)
3050 for (i = 4;
3051 bfd_get_section_contents (abfd, glink, buf,
3052 glink_vma - glink->vma + i, 4);
3053 i += 4)
3054 if (bfd_get_32 (abfd, buf) != NOP)
3055 {
3056 resolv_vma = glink_vma + i;
3057 break;
3058 }
3059 }
3060
3061 count = relplt->size / sizeof (Elf32_External_Rela);
3062 /* If the stubs are those for -shared/-pie then we might have
3063 multiple stubs for each plt entry. If that is the case then
3064 there is no way to associate stubs with their plt entries short
3065 of figuring out the GOT pointer value used in the stub.
3066 The offsets tested here need to cover all possible values of
3067 GLINK_ENTRY_SIZE for other than __tls_get_addr_opt. */
3068 stub_off = glink_vma - glink->vma;
3069 for (stub_delta = 16; stub_delta <= 32; stub_delta += 8)
3070 if (is_nonpic_glink_stub (abfd, glink, stub_off - stub_delta))
3071 break;
3072 if (stub_delta > 32)
3073 return 0;
3074
3075 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3076 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3077 return -1;
3078
3079 size = count * sizeof (asymbol);
3080 p = relplt->relocation;
3081 for (i = 0; i < count; i++, p++)
3082 {
3083 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3084 if (p->addend != 0)
3085 size += sizeof ("+0x") - 1 + 8;
3086 }
3087
3088 size += sizeof (asymbol) + sizeof ("__glink");
3089
3090 if (resolv_vma)
3091 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3092
3093 s = *ret = bfd_malloc (size);
3094 if (s == NULL)
3095 return -1;
3096
3097 stub_off = glink_vma - glink->vma;
3098 names = (char *) (s + count + 1 + (resolv_vma != 0));
3099 p = relplt->relocation + count - 1;
3100 for (i = 0; i < count; i++)
3101 {
3102 size_t len;
3103
3104 stub_off -= stub_delta;
3105 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3106 stub_off -= 32;
3107 *s = **p->sym_ptr_ptr;
3108 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3109 we are defining a symbol, ensure one of them is set. */
3110 if ((s->flags & BSF_LOCAL) == 0)
3111 s->flags |= BSF_GLOBAL;
3112 s->flags |= BSF_SYNTHETIC;
3113 s->section = glink;
3114 s->value = stub_off;
3115 s->name = names;
3116 s->udata.p = NULL;
3117 len = strlen ((*p->sym_ptr_ptr)->name);
3118 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3119 names += len;
3120 if (p->addend != 0)
3121 {
3122 memcpy (names, "+0x", sizeof ("+0x") - 1);
3123 names += sizeof ("+0x") - 1;
3124 bfd_sprintf_vma (abfd, names, p->addend);
3125 names += strlen (names);
3126 }
3127 memcpy (names, "@plt", sizeof ("@plt"));
3128 names += sizeof ("@plt");
3129 ++s;
3130 --p;
3131 }
3132
3133 /* Add a symbol at the start of the glink branch table. */
3134 memset (s, 0, sizeof *s);
3135 s->the_bfd = abfd;
3136 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3137 s->section = glink;
3138 s->value = glink_vma - glink->vma;
3139 s->name = names;
3140 memcpy (names, "__glink", sizeof ("__glink"));
3141 names += sizeof ("__glink");
3142 s++;
3143 count++;
3144
3145 if (resolv_vma)
3146 {
3147 /* Add a symbol for the glink PLT resolver. */
3148 memset (s, 0, sizeof *s);
3149 s->the_bfd = abfd;
3150 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3151 s->section = glink;
3152 s->value = resolv_vma - glink->vma;
3153 s->name = names;
3154 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3155 names += sizeof ("__glink_PLTresolve");
3156 s++;
3157 count++;
3158 }
3159
3160 return count;
3161 }
3162 \f
3163 /* The following functions are specific to the ELF linker, while
3164 functions above are used generally. They appear in this file more
3165 or less in the order in which they are called. eg.
3166 ppc_elf_check_relocs is called early in the link process,
3167 ppc_elf_finish_dynamic_sections is one of the last functions
3168 called. */
3169
3170 /* Track PLT entries needed for a given symbol. We might need more
3171 than one glink entry per symbol when generating a pic binary. */
3172 struct plt_entry
3173 {
3174 struct plt_entry *next;
3175
3176 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3177 This field stores the offset into .got2 used to initialise the
3178 GOT pointer reg. It will always be at least 32768. (Current
3179 gcc always uses an offset of 32768, but ld -r will pack .got2
3180 sections together resulting in larger offsets). */
3181 bfd_vma addend;
3182
3183 /* The .got2 section. */
3184 asection *sec;
3185
3186 /* PLT refcount or offset. */
3187 union
3188 {
3189 bfd_signed_vma refcount;
3190 bfd_vma offset;
3191 } plt;
3192
3193 /* .glink stub offset. */
3194 bfd_vma glink_offset;
3195 };
3196
3197 /* Of those relocs that might be copied as dynamic relocs, this
3198 function selects those that must be copied when linking a shared
3199 library or PIE, even when the symbol is local. */
3200
3201 static int
3202 must_be_dyn_reloc (struct bfd_link_info *info,
3203 enum elf_ppc_reloc_type r_type)
3204 {
3205 switch (r_type)
3206 {
3207 default:
3208 /* Only relative relocs can be resolved when the object load
3209 address isn't fixed. DTPREL32 is excluded because the
3210 dynamic linker needs to differentiate global dynamic from
3211 local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
3212 return 1;
3213
3214 case R_PPC_REL24:
3215 case R_PPC_REL14:
3216 case R_PPC_REL14_BRTAKEN:
3217 case R_PPC_REL14_BRNTAKEN:
3218 case R_PPC_REL32:
3219 return 0;
3220
3221 case R_PPC_TPREL32:
3222 case R_PPC_TPREL16:
3223 case R_PPC_TPREL16_LO:
3224 case R_PPC_TPREL16_HI:
3225 case R_PPC_TPREL16_HA:
3226 /* These relocations are relative but in a shared library the
3227 linker doesn't know the thread pointer base. */
3228 return bfd_link_dll (info);
3229 }
3230 }
3231
3232 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3233 copying dynamic variables from a shared lib into an app's dynbss
3234 section, and instead use a dynamic relocation to point into the
3235 shared lib. */
3236 #define ELIMINATE_COPY_RELOCS 1
3237
3238 /* Used to track dynamic relocations for local symbols. */
3239 struct ppc_dyn_relocs
3240 {
3241 struct ppc_dyn_relocs *next;
3242
3243 /* The input section of the reloc. */
3244 asection *sec;
3245
3246 /* Total number of relocs copied for the input section. */
3247 unsigned int count : 31;
3248
3249 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3250 unsigned int ifunc : 1;
3251 };
3252
3253 /* PPC ELF linker hash entry. */
3254
3255 struct ppc_elf_link_hash_entry
3256 {
3257 struct elf_link_hash_entry elf;
3258
3259 /* If this symbol is used in the linker created sections, the processor
3260 specific backend uses this field to map the field into the offset
3261 from the beginning of the section. */
3262 elf_linker_section_pointers_t *linker_section_pointer;
3263
3264 /* Track dynamic relocs copied for this symbol. */
3265 struct elf_dyn_relocs *dyn_relocs;
3266
3267 /* Contexts in which symbol is used in the GOT.
3268 Bits are or'd into the mask as the corresponding relocs are
3269 encountered during check_relocs, with TLS_TLS being set when any
3270 of the other TLS bits are set. tls_optimize clears bits when
3271 optimizing to indicate the corresponding GOT entry type is not
3272 needed. If set, TLS_TLS is never cleared. tls_optimize may also
3273 set TLS_TPRELGD when a GD reloc turns into a TPREL one. We use a
3274 separate flag rather than setting TPREL just for convenience in
3275 distinguishing the two cases.
3276 These flags are also kept for local symbols. */
3277 #define TLS_TLS 1 /* Any TLS reloc. */
3278 #define TLS_GD 2 /* GD reloc. */
3279 #define TLS_LD 4 /* LD reloc. */
3280 #define TLS_TPREL 8 /* TPREL reloc, => IE. */
3281 #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */
3282 #define TLS_MARK 32 /* __tls_get_addr call marked. */
3283 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3284 unsigned char tls_mask;
3285
3286 /* The above field is also used to mark function symbols. In which
3287 case TLS_TLS will be 0. */
3288 #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */
3289 #define PLT_KEEP 4 /* inline plt call requires plt entry. */
3290 #define NON_GOT 256 /* local symbol plt, not stored. */
3291
3292 /* Nonzero if we have seen a small data relocation referring to this
3293 symbol. */
3294 unsigned char has_sda_refs : 1;
3295
3296 /* Flag use of given relocations. */
3297 unsigned char has_addr16_ha : 1;
3298 unsigned char has_addr16_lo : 1;
3299 };
3300
3301 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3302
3303 /* PPC ELF linker hash table. */
3304
3305 struct ppc_elf_link_hash_table
3306 {
3307 struct elf_link_hash_table elf;
3308
3309 /* Various options passed from the linker. */
3310 struct ppc_elf_params *params;
3311
3312 /* Short-cuts to get to dynamic linker sections. */
3313 asection *glink;
3314 asection *dynsbss;
3315 asection *relsbss;
3316 elf_linker_section_t sdata[2];
3317 asection *sbss;
3318 asection *glink_eh_frame;
3319 asection *pltlocal;
3320 asection *relpltlocal;
3321
3322 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3323 asection *srelplt2;
3324
3325 /* Shortcut to __tls_get_addr. */
3326 struct elf_link_hash_entry *tls_get_addr;
3327
3328 /* The bfd that forced an old-style PLT. */
3329 bfd *old_bfd;
3330
3331 /* TLS local dynamic got entry handling. */
3332 union {
3333 bfd_signed_vma refcount;
3334 bfd_vma offset;
3335 } tlsld_got;
3336
3337 /* Offset of branch table to PltResolve function in glink. */
3338 bfd_vma glink_pltresolve;
3339
3340 /* Size of reserved GOT entries. */
3341 unsigned int got_header_size;
3342 /* Non-zero if allocating the header left a gap. */
3343 unsigned int got_gap;
3344
3345 /* The type of PLT we have chosen to use. */
3346 enum ppc_elf_plt_type plt_type;
3347
3348 /* True if the target system is VxWorks. */
3349 unsigned int is_vxworks:1;
3350
3351 /* Whether there exist local gnu indirect function resolvers,
3352 referenced by dynamic relocations. */
3353 unsigned int local_ifunc_resolver:1;
3354 unsigned int maybe_local_ifunc_resolver:1;
3355
3356 /* Set if tls optimization is enabled. */
3357 unsigned int do_tls_opt:1;
3358
3359 /* Set if inline plt calls should be converted to direct calls. */
3360 unsigned int can_convert_all_inline_plt:1;
3361
3362 /* The size of PLT entries. */
3363 int plt_entry_size;
3364 /* The distance between adjacent PLT slots. */
3365 int plt_slot_size;
3366 /* The size of the first PLT entry. */
3367 int plt_initial_entry_size;
3368
3369 /* Small local sym cache. */
3370 struct sym_cache sym_cache;
3371 };
3372
3373 /* Rename some of the generic section flags to better document how they
3374 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3375
3376 /* Nonzero if this section has TLS related relocations. */
3377 #define has_tls_reloc sec_flg0
3378
3379 /* Nonzero if this section has a call to __tls_get_addr. */
3380 #define has_tls_get_addr_call sec_flg1
3381
3382 /* Flag set when PLTCALL relocs are detected. */
3383 #define has_pltcall sec_flg2
3384
3385 /* Get the PPC ELF linker hash table from a link_info structure. */
3386
3387 #define ppc_elf_hash_table(p) \
3388 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3389 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3390
3391 /* Create an entry in a PPC ELF linker hash table. */
3392
3393 static struct bfd_hash_entry *
3394 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3395 struct bfd_hash_table *table,
3396 const char *string)
3397 {
3398 /* Allocate the structure if it has not already been allocated by a
3399 subclass. */
3400 if (entry == NULL)
3401 {
3402 entry = bfd_hash_allocate (table,
3403 sizeof (struct ppc_elf_link_hash_entry));
3404 if (entry == NULL)
3405 return entry;
3406 }
3407
3408 /* Call the allocation method of the superclass. */
3409 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3410 if (entry != NULL)
3411 {
3412 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3413 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3414 ppc_elf_hash_entry (entry)->tls_mask = 0;
3415 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3416 }
3417
3418 return entry;
3419 }
3420
3421 /* Create a PPC ELF linker hash table. */
3422
3423 static struct bfd_link_hash_table *
3424 ppc_elf_link_hash_table_create (bfd *abfd)
3425 {
3426 struct ppc_elf_link_hash_table *ret;
3427 static struct ppc_elf_params default_params
3428 = { PLT_OLD, 0, 0, 1, 0, 0, 12, 0, 0, 0 };
3429
3430 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3431 if (ret == NULL)
3432 return NULL;
3433
3434 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3435 ppc_elf_link_hash_newfunc,
3436 sizeof (struct ppc_elf_link_hash_entry),
3437 PPC32_ELF_DATA))
3438 {
3439 free (ret);
3440 return NULL;
3441 }
3442
3443 ret->elf.init_plt_refcount.refcount = 0;
3444 ret->elf.init_plt_refcount.glist = NULL;
3445 ret->elf.init_plt_offset.offset = 0;
3446 ret->elf.init_plt_offset.glist = NULL;
3447
3448 ret->params = &default_params;
3449
3450 ret->sdata[0].name = ".sdata";
3451 ret->sdata[0].sym_name = "_SDA_BASE_";
3452 ret->sdata[0].bss_name = ".sbss";
3453
3454 ret->sdata[1].name = ".sdata2";
3455 ret->sdata[1].sym_name = "_SDA2_BASE_";
3456 ret->sdata[1].bss_name = ".sbss2";
3457
3458 ret->plt_entry_size = 12;
3459 ret->plt_slot_size = 8;
3460 ret->plt_initial_entry_size = 72;
3461
3462 return &ret->elf.root;
3463 }
3464
3465 /* Hook linker params into hash table. */
3466
3467 void
3468 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3469 {
3470 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3471
3472 if (htab)
3473 htab->params = params;
3474 params->pagesize_p2 = bfd_log2 (params->pagesize);
3475 }
3476
3477 /* Create .got and the related sections. */
3478
3479 static bfd_boolean
3480 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3481 {
3482 struct ppc_elf_link_hash_table *htab;
3483
3484 if (!_bfd_elf_create_got_section (abfd, info))
3485 return FALSE;
3486
3487 htab = ppc_elf_hash_table (info);
3488 if (!htab->is_vxworks)
3489 {
3490 /* The powerpc .got has a blrl instruction in it. Mark it
3491 executable. */
3492 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3493 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3494 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3495 return FALSE;
3496 }
3497
3498 return TRUE;
3499 }
3500
3501 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3502 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3503 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3504
3505 static bfd_boolean
3506 ppc_elf_create_linker_section (bfd *abfd,
3507 struct bfd_link_info *info,
3508 flagword flags,
3509 elf_linker_section_t *lsect)
3510 {
3511 asection *s;
3512
3513 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3514 | SEC_LINKER_CREATED);
3515
3516 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3517 if (s == NULL)
3518 return FALSE;
3519 lsect->section = s;
3520
3521 /* Define the sym on the first section of this name. */
3522 s = bfd_get_section_by_name (abfd, lsect->name);
3523
3524 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3525 if (lsect->sym == NULL)
3526 return FALSE;
3527 lsect->sym->root.u.def.value = 0x8000;
3528 return TRUE;
3529 }
3530
3531 static bfd_boolean
3532 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3533 {
3534 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3535 asection *s;
3536 flagword flags;
3537 int p2align;
3538
3539 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3540 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3541 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3542 htab->glink = s;
3543 p2align = htab->params->ppc476_workaround ? 6 : 4;
3544 if (p2align < htab->params->plt_stub_align)
3545 p2align = htab->params->plt_stub_align;
3546 if (s == NULL
3547 || !bfd_set_section_alignment (abfd, s, p2align))
3548 return FALSE;
3549
3550 if (!info->no_ld_generated_unwind_info)
3551 {
3552 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3553 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3554 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3555 htab->glink_eh_frame = s;
3556 if (s == NULL
3557 || !bfd_set_section_alignment (abfd, s, 2))
3558 return FALSE;
3559 }
3560
3561 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3562 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3563 htab->elf.iplt = s;
3564 if (s == NULL
3565 || !bfd_set_section_alignment (abfd, s, 4))
3566 return FALSE;
3567
3568 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3569 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3570 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3571 htab->elf.irelplt = s;
3572 if (s == NULL
3573 || ! bfd_set_section_alignment (abfd, s, 2))
3574 return FALSE;
3575
3576 /* Local plt entries. */
3577 flags = (SEC_ALLOC | SEC_LOAD
3578 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3579 htab->pltlocal = bfd_make_section_anyway_with_flags (abfd, ".branch_lt",
3580 flags);
3581 if (htab->pltlocal == NULL
3582 || ! bfd_set_section_alignment (abfd, htab->pltlocal, 2))
3583 return FALSE;
3584
3585 if (bfd_link_pic (info))
3586 {
3587 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3588 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3589 htab->relpltlocal
3590 = bfd_make_section_anyway_with_flags (abfd, ".rela.branch_lt", flags);
3591 if (htab->relpltlocal == NULL
3592 || ! bfd_set_section_alignment (abfd, htab->relpltlocal, 2))
3593 return FALSE;
3594 }
3595
3596 if (!ppc_elf_create_linker_section (abfd, info, 0,
3597 &htab->sdata[0]))
3598 return FALSE;
3599
3600 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3601 &htab->sdata[1]))
3602 return FALSE;
3603
3604 return TRUE;
3605 }
3606
3607 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3608 to output sections (just like _bfd_elf_create_dynamic_sections has
3609 to create .dynbss and .rela.bss). */
3610
3611 static bfd_boolean
3612 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3613 {
3614 struct ppc_elf_link_hash_table *htab;
3615 asection *s;
3616 flagword flags;
3617
3618 htab = ppc_elf_hash_table (info);
3619
3620 if (htab->elf.sgot == NULL
3621 && !ppc_elf_create_got (abfd, info))
3622 return FALSE;
3623
3624 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3625 return FALSE;
3626
3627 if (htab->glink == NULL
3628 && !ppc_elf_create_glink (abfd, info))
3629 return FALSE;
3630
3631 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3632 SEC_ALLOC | SEC_LINKER_CREATED);
3633 htab->dynsbss = s;
3634 if (s == NULL)
3635 return FALSE;
3636
3637 if (! bfd_link_pic (info))
3638 {
3639 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3640 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3641 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3642 htab->relsbss = s;
3643 if (s == NULL
3644 || ! bfd_set_section_alignment (abfd, s, 2))
3645 return FALSE;
3646 }
3647
3648 if (htab->is_vxworks
3649 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3650 return FALSE;
3651
3652 s = htab->elf.splt;
3653 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3654 if (htab->plt_type == PLT_VXWORKS)
3655 /* The VxWorks PLT is a loaded section with contents. */
3656 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3657 return bfd_set_section_flags (abfd, s, flags);
3658 }
3659
3660 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3661
3662 static void
3663 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3664 struct elf_link_hash_entry *dir,
3665 struct elf_link_hash_entry *ind)
3666 {
3667 struct ppc_elf_link_hash_entry *edir, *eind;
3668
3669 edir = (struct ppc_elf_link_hash_entry *) dir;
3670 eind = (struct ppc_elf_link_hash_entry *) ind;
3671
3672 edir->tls_mask |= eind->tls_mask;
3673 edir->has_sda_refs |= eind->has_sda_refs;
3674
3675 if (edir->elf.versioned != versioned_hidden)
3676 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3677 edir->elf.ref_regular |= eind->elf.ref_regular;
3678 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3679 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3680 edir->elf.needs_plt |= eind->elf.needs_plt;
3681 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3682
3683 /* If we were called to copy over info for a weak sym, that's all. */
3684 if (eind->elf.root.type != bfd_link_hash_indirect)
3685 return;
3686
3687 if (eind->dyn_relocs != NULL)
3688 {
3689 if (edir->dyn_relocs != NULL)
3690 {
3691 struct elf_dyn_relocs **pp;
3692 struct elf_dyn_relocs *p;
3693
3694 /* Add reloc counts against the indirect sym to the direct sym
3695 list. Merge any entries against the same section. */
3696 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3697 {
3698 struct elf_dyn_relocs *q;
3699
3700 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3701 if (q->sec == p->sec)
3702 {
3703 q->pc_count += p->pc_count;
3704 q->count += p->count;
3705 *pp = p->next;
3706 break;
3707 }
3708 if (q == NULL)
3709 pp = &p->next;
3710 }
3711 *pp = edir->dyn_relocs;
3712 }
3713
3714 edir->dyn_relocs = eind->dyn_relocs;
3715 eind->dyn_relocs = NULL;
3716 }
3717
3718 /* Copy over the GOT refcount entries that we may have already seen to
3719 the symbol which just became indirect. */
3720 edir->elf.got.refcount += eind->elf.got.refcount;
3721 eind->elf.got.refcount = 0;
3722
3723 /* And plt entries. */
3724 if (eind->elf.plt.plist != NULL)
3725 {
3726 if (edir->elf.plt.plist != NULL)
3727 {
3728 struct plt_entry **entp;
3729 struct plt_entry *ent;
3730
3731 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3732 {
3733 struct plt_entry *dent;
3734
3735 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3736 if (dent->sec == ent->sec && dent->addend == ent->addend)
3737 {
3738 dent->plt.refcount += ent->plt.refcount;
3739 *entp = ent->next;
3740 break;
3741 }
3742 if (dent == NULL)
3743 entp = &ent->next;
3744 }
3745 *entp = edir->elf.plt.plist;
3746 }
3747
3748 edir->elf.plt.plist = eind->elf.plt.plist;
3749 eind->elf.plt.plist = NULL;
3750 }
3751
3752 if (eind->elf.dynindx != -1)
3753 {
3754 if (edir->elf.dynindx != -1)
3755 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3756 edir->elf.dynstr_index);
3757 edir->elf.dynindx = eind->elf.dynindx;
3758 edir->elf.dynstr_index = eind->elf.dynstr_index;
3759 eind->elf.dynindx = -1;
3760 eind->elf.dynstr_index = 0;
3761 }
3762 }
3763
3764 /* Hook called by the linker routine which adds symbols from an object
3765 file. We use it to put .comm items in .sbss, and not .bss. */
3766
3767 static bfd_boolean
3768 ppc_elf_add_symbol_hook (bfd *abfd,
3769 struct bfd_link_info *info,
3770 Elf_Internal_Sym *sym,
3771 const char **namep ATTRIBUTE_UNUSED,
3772 flagword *flagsp ATTRIBUTE_UNUSED,
3773 asection **secp,
3774 bfd_vma *valp)
3775 {
3776 if (sym->st_shndx == SHN_COMMON
3777 && !bfd_link_relocatable (info)
3778 && is_ppc_elf (info->output_bfd)
3779 && sym->st_size <= elf_gp_size (abfd))
3780 {
3781 /* Common symbols less than or equal to -G nn bytes are automatically
3782 put into .sbss. */
3783 struct ppc_elf_link_hash_table *htab;
3784
3785 htab = ppc_elf_hash_table (info);
3786 if (htab->sbss == NULL)
3787 {
3788 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3789
3790 if (!htab->elf.dynobj)
3791 htab->elf.dynobj = abfd;
3792
3793 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3794 ".sbss",
3795 flags);
3796 if (htab->sbss == NULL)
3797 return FALSE;
3798 }
3799
3800 *secp = htab->sbss;
3801 *valp = sym->st_size;
3802 }
3803
3804 return TRUE;
3805 }
3806 \f
3807 /* Find a linker generated pointer with a given addend and type. */
3808
3809 static elf_linker_section_pointers_t *
3810 elf_find_pointer_linker_section
3811 (elf_linker_section_pointers_t *linker_pointers,
3812 bfd_vma addend,
3813 elf_linker_section_t *lsect)
3814 {
3815 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3816 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3817 return linker_pointers;
3818
3819 return NULL;
3820 }
3821
3822 /* Allocate a pointer to live in a linker created section. */
3823
3824 static bfd_boolean
3825 elf_allocate_pointer_linker_section (bfd *abfd,
3826 elf_linker_section_t *lsect,
3827 struct elf_link_hash_entry *h,
3828 const Elf_Internal_Rela *rel)
3829 {
3830 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3831 elf_linker_section_pointers_t *linker_section_ptr;
3832 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3833 bfd_size_type amt;
3834
3835 BFD_ASSERT (lsect != NULL);
3836
3837 /* Is this a global symbol? */
3838 if (h != NULL)
3839 {
3840 struct ppc_elf_link_hash_entry *eh;
3841
3842 /* Has this symbol already been allocated? If so, our work is done. */
3843 eh = (struct ppc_elf_link_hash_entry *) h;
3844 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3845 rel->r_addend,
3846 lsect))
3847 return TRUE;
3848
3849 ptr_linker_section_ptr = &eh->linker_section_pointer;
3850 }
3851 else
3852 {
3853 BFD_ASSERT (is_ppc_elf (abfd));
3854
3855 /* Allocation of a pointer to a local symbol. */
3856 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3857
3858 /* Allocate a table to hold the local symbols if first time. */
3859 if (!ptr)
3860 {
3861 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3862
3863 amt = num_symbols;
3864 amt *= sizeof (elf_linker_section_pointers_t *);
3865 ptr = bfd_zalloc (abfd, amt);
3866
3867 if (!ptr)
3868 return FALSE;
3869
3870 elf_local_ptr_offsets (abfd) = ptr;
3871 }
3872
3873 /* Has this symbol already been allocated? If so, our work is done. */
3874 if (elf_find_pointer_linker_section (ptr[r_symndx],
3875 rel->r_addend,
3876 lsect))
3877 return TRUE;
3878
3879 ptr_linker_section_ptr = &ptr[r_symndx];
3880 }
3881
3882 /* Allocate space for a pointer in the linker section, and allocate
3883 a new pointer record from internal memory. */
3884 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3885 amt = sizeof (elf_linker_section_pointers_t);
3886 linker_section_ptr = bfd_alloc (abfd, amt);
3887
3888 if (!linker_section_ptr)
3889 return FALSE;
3890
3891 linker_section_ptr->next = *ptr_linker_section_ptr;
3892 linker_section_ptr->addend = rel->r_addend;
3893 linker_section_ptr->lsect = lsect;
3894 *ptr_linker_section_ptr = linker_section_ptr;
3895
3896 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3897 return FALSE;
3898 linker_section_ptr->offset = lsect->section->size;
3899 lsect->section->size += 4;
3900
3901 #ifdef DEBUG
3902 fprintf (stderr,
3903 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3904 lsect->name, (long) linker_section_ptr->offset,
3905 (long) lsect->section->size);
3906 #endif
3907
3908 return TRUE;
3909 }
3910
3911 static struct plt_entry **
3912 update_local_sym_info (bfd *abfd,
3913 Elf_Internal_Shdr *symtab_hdr,
3914 unsigned long r_symndx,
3915 int tls_type)
3916 {
3917 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3918 struct plt_entry **local_plt;
3919 unsigned char *local_got_tls_masks;
3920
3921 if (local_got_refcounts == NULL)
3922 {
3923 bfd_size_type size = symtab_hdr->sh_info;
3924
3925 size *= (sizeof (*local_got_refcounts)
3926 + sizeof (*local_plt)
3927 + sizeof (*local_got_tls_masks));
3928 local_got_refcounts = bfd_zalloc (abfd, size);
3929 if (local_got_refcounts == NULL)
3930 return NULL;
3931 elf_local_got_refcounts (abfd) = local_got_refcounts;
3932 }
3933
3934 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3935 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
3936 local_got_tls_masks[r_symndx] |= tls_type & 0xff;
3937 if ((tls_type & NON_GOT) == 0)
3938 local_got_refcounts[r_symndx] += 1;
3939 return local_plt + r_symndx;
3940 }
3941
3942 static bfd_boolean
3943 update_plt_info (bfd *abfd, struct plt_entry **plist,
3944 asection *sec, bfd_vma addend)
3945 {
3946 struct plt_entry *ent;
3947
3948 if (addend < 32768)
3949 sec = NULL;
3950 for (ent = *plist; ent != NULL; ent = ent->next)
3951 if (ent->sec == sec && ent->addend == addend)
3952 break;
3953 if (ent == NULL)
3954 {
3955 bfd_size_type amt = sizeof (*ent);
3956 ent = bfd_alloc (abfd, amt);
3957 if (ent == NULL)
3958 return FALSE;
3959 ent->next = *plist;
3960 ent->sec = sec;
3961 ent->addend = addend;
3962 ent->plt.refcount = 0;
3963 *plist = ent;
3964 }
3965 ent->plt.refcount += 1;
3966 return TRUE;
3967 }
3968
3969 static struct plt_entry *
3970 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3971 {
3972 struct plt_entry *ent;
3973
3974 if (addend < 32768)
3975 sec = NULL;
3976 for (ent = *plist; ent != NULL; ent = ent->next)
3977 if (ent->sec == sec && ent->addend == addend)
3978 break;
3979 return ent;
3980 }
3981
3982 static bfd_boolean
3983 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3984 {
3985 return (r_type == R_PPC_PLTREL24
3986 || r_type == R_PPC_LOCAL24PC
3987 || r_type == R_PPC_REL24
3988 || r_type == R_PPC_REL14
3989 || r_type == R_PPC_REL14_BRTAKEN
3990 || r_type == R_PPC_REL14_BRNTAKEN
3991 || r_type == R_PPC_ADDR24
3992 || r_type == R_PPC_ADDR14
3993 || r_type == R_PPC_ADDR14_BRTAKEN
3994 || r_type == R_PPC_ADDR14_BRNTAKEN
3995 || r_type == R_PPC_VLE_REL24);
3996 }
3997
3998 /* Relocs on inline plt call sequence insns prior to the call. */
3999
4000 static bfd_boolean
4001 is_plt_seq_reloc (enum elf_ppc_reloc_type r_type)
4002 {
4003 return (r_type == R_PPC_PLT16_HA
4004 || r_type == R_PPC_PLT16_HI
4005 || r_type == R_PPC_PLT16_LO
4006 || r_type == R_PPC_PLTSEQ);
4007 }
4008
4009 static void
4010 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
4011 {
4012 _bfd_error_handler
4013 /* xgettext:c-format */
4014 (_("%pB: relocation %s cannot be used when making a shared object"),
4015 abfd,
4016 ppc_elf_howto_table[r_type]->name);
4017 bfd_set_error (bfd_error_bad_value);
4018 }
4019
4020 /* Look through the relocs for a section during the first phase, and
4021 allocate space in the global offset table or procedure linkage
4022 table. */
4023
4024 static bfd_boolean
4025 ppc_elf_check_relocs (bfd *abfd,
4026 struct bfd_link_info *info,
4027 asection *sec,
4028 const Elf_Internal_Rela *relocs)
4029 {
4030 struct ppc_elf_link_hash_table *htab;
4031 Elf_Internal_Shdr *symtab_hdr;
4032 struct elf_link_hash_entry **sym_hashes;
4033 const Elf_Internal_Rela *rel;
4034 const Elf_Internal_Rela *rel_end;
4035 asection *got2, *sreloc;
4036 struct elf_link_hash_entry *tga;
4037
4038 if (bfd_link_relocatable (info))
4039 return TRUE;
4040
4041 /* Don't do anything special with non-loaded, non-alloced sections.
4042 In particular, any relocs in such sections should not affect GOT
4043 and PLT reference counting (ie. we don't allow them to create GOT
4044 or PLT entries), there's no possibility or desire to optimize TLS
4045 relocs, and there's not much point in propagating relocs to shared
4046 libs that the dynamic linker won't relocate. */
4047 if ((sec->flags & SEC_ALLOC) == 0)
4048 return TRUE;
4049
4050 #ifdef DEBUG
4051 _bfd_error_handler ("ppc_elf_check_relocs called for section %pA in %pB",
4052 sec, abfd);
4053 #endif
4054
4055 BFD_ASSERT (is_ppc_elf (abfd));
4056
4057 /* Initialize howto table if not already done. */
4058 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4059 ppc_elf_howto_init ();
4060
4061 htab = ppc_elf_hash_table (info);
4062 if (htab->glink == NULL)
4063 {
4064 if (htab->elf.dynobj == NULL)
4065 htab->elf.dynobj = abfd;
4066 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4067 return FALSE;
4068 }
4069 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4070 FALSE, FALSE, TRUE);
4071 symtab_hdr = &elf_symtab_hdr (abfd);
4072 sym_hashes = elf_sym_hashes (abfd);
4073 got2 = bfd_get_section_by_name (abfd, ".got2");
4074 sreloc = NULL;
4075
4076 rel_end = relocs + sec->reloc_count;
4077 for (rel = relocs; rel < rel_end; rel++)
4078 {
4079 unsigned long r_symndx;
4080 enum elf_ppc_reloc_type r_type;
4081 struct elf_link_hash_entry *h;
4082 int tls_type;
4083 struct plt_entry **ifunc;
4084 struct plt_entry **pltent;
4085 bfd_vma addend;
4086
4087 r_symndx = ELF32_R_SYM (rel->r_info);
4088 if (r_symndx < symtab_hdr->sh_info)
4089 h = NULL;
4090 else
4091 {
4092 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4093 while (h->root.type == bfd_link_hash_indirect
4094 || h->root.type == bfd_link_hash_warning)
4095 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4096 }
4097
4098 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4099 This shows up in particular in an R_PPC_ADDR32 in the eabi
4100 startup code. */
4101 if (h != NULL
4102 && htab->elf.sgot == NULL
4103 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4104 {
4105 if (htab->elf.dynobj == NULL)
4106 htab->elf.dynobj = abfd;
4107 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4108 return FALSE;
4109 BFD_ASSERT (h == htab->elf.hgot);
4110 }
4111
4112 tls_type = 0;
4113 r_type = ELF32_R_TYPE (rel->r_info);
4114 ifunc = NULL;
4115 if (h == NULL && !htab->is_vxworks)
4116 {
4117 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4118 abfd, r_symndx);
4119 if (isym == NULL)
4120 return FALSE;
4121
4122 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4123 {
4124 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4125 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4126 NON_GOT | PLT_IFUNC);
4127 if (ifunc == NULL)
4128 return FALSE;
4129
4130 /* STT_GNU_IFUNC symbols must have a PLT entry;
4131 In a non-pie executable even when there are
4132 no plt calls. */
4133 if (!bfd_link_pic (info)
4134 || is_branch_reloc (r_type)
4135 || r_type == R_PPC_PLT16_LO
4136 || r_type == R_PPC_PLT16_HI
4137 || r_type == R_PPC_PLT16_HA)
4138 {
4139 addend = 0;
4140 if (r_type == R_PPC_PLTREL24)
4141 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4142 if (bfd_link_pic (info)
4143 && (r_type == R_PPC_PLTREL24
4144 || r_type == R_PPC_PLT16_LO
4145 || r_type == R_PPC_PLT16_HI
4146 || r_type == R_PPC_PLT16_HA))
4147 addend = rel->r_addend;
4148 if (!update_plt_info (abfd, ifunc, got2, addend))
4149 return FALSE;
4150 }
4151 }
4152 }
4153
4154 if (!htab->is_vxworks
4155 && is_branch_reloc (r_type)
4156 && h != NULL
4157 && h == tga)
4158 {
4159 if (rel != relocs
4160 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4161 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4162 /* We have a new-style __tls_get_addr call with a marker
4163 reloc. */
4164 ;
4165 else
4166 /* Mark this section as having an old-style call. */
4167 sec->has_tls_get_addr_call = 1;
4168 }
4169
4170 switch (r_type)
4171 {
4172 case R_PPC_TLSGD:
4173 case R_PPC_TLSLD:
4174 /* These special tls relocs tie a call to __tls_get_addr with
4175 its parameter symbol. */
4176 if (h != NULL)
4177 ppc_elf_hash_entry (h)->tls_mask |= TLS_TLS | TLS_MARK;
4178 else
4179 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4180 NON_GOT | TLS_TLS | TLS_MARK))
4181 return FALSE;
4182 break;
4183
4184 case R_PPC_PLTSEQ:
4185 break;
4186
4187 case R_PPC_GOT_TLSLD16:
4188 case R_PPC_GOT_TLSLD16_LO:
4189 case R_PPC_GOT_TLSLD16_HI:
4190 case R_PPC_GOT_TLSLD16_HA:
4191 tls_type = TLS_TLS | TLS_LD;
4192 goto dogottls;
4193
4194 case R_PPC_GOT_TLSGD16:
4195 case R_PPC_GOT_TLSGD16_LO:
4196 case R_PPC_GOT_TLSGD16_HI:
4197 case R_PPC_GOT_TLSGD16_HA:
4198 tls_type = TLS_TLS | TLS_GD;
4199 goto dogottls;
4200
4201 case R_PPC_GOT_TPREL16:
4202 case R_PPC_GOT_TPREL16_LO:
4203 case R_PPC_GOT_TPREL16_HI:
4204 case R_PPC_GOT_TPREL16_HA:
4205 if (bfd_link_dll (info))
4206 info->flags |= DF_STATIC_TLS;
4207 tls_type = TLS_TLS | TLS_TPREL;
4208 goto dogottls;
4209
4210 case R_PPC_GOT_DTPREL16:
4211 case R_PPC_GOT_DTPREL16_LO:
4212 case R_PPC_GOT_DTPREL16_HI:
4213 case R_PPC_GOT_DTPREL16_HA:
4214 tls_type = TLS_TLS | TLS_DTPREL;
4215 dogottls:
4216 sec->has_tls_reloc = 1;
4217 /* Fall through. */
4218
4219 /* GOT16 relocations */
4220 case R_PPC_GOT16:
4221 case R_PPC_GOT16_LO:
4222 case R_PPC_GOT16_HI:
4223 case R_PPC_GOT16_HA:
4224 /* This symbol requires a global offset table entry. */
4225 if (htab->elf.sgot == NULL)
4226 {
4227 if (htab->elf.dynobj == NULL)
4228 htab->elf.dynobj = abfd;
4229 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4230 return FALSE;
4231 }
4232 if (h != NULL)
4233 {
4234 h->got.refcount += 1;
4235 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4236 }
4237 else
4238 /* This is a global offset table entry for a local symbol. */
4239 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4240 return FALSE;
4241
4242 /* We may also need a plt entry if the symbol turns out to be
4243 an ifunc. */
4244 if (h != NULL && !bfd_link_pic (info))
4245 {
4246 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4247 return FALSE;
4248 }
4249 break;
4250
4251 /* Indirect .sdata relocation. */
4252 case R_PPC_EMB_SDAI16:
4253 if (bfd_link_pic (info))
4254 {
4255 bad_shared_reloc (abfd, r_type);
4256 return FALSE;
4257 }
4258 htab->sdata[0].sym->ref_regular = 1;
4259 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4260 h, rel))
4261 return FALSE;
4262 if (h != NULL)
4263 {
4264 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4265 h->non_got_ref = TRUE;
4266 }
4267 break;
4268
4269 /* Indirect .sdata2 relocation. */
4270 case R_PPC_EMB_SDA2I16:
4271 if (bfd_link_pic (info))
4272 {
4273 bad_shared_reloc (abfd, r_type);
4274 return FALSE;
4275 }
4276 htab->sdata[1].sym->ref_regular = 1;
4277 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4278 h, rel))
4279 return FALSE;
4280 if (h != NULL)
4281 {
4282 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4283 h->non_got_ref = TRUE;
4284 }
4285 break;
4286
4287 case R_PPC_SDAREL16:
4288 htab->sdata[0].sym->ref_regular = 1;
4289 /* Fall through. */
4290
4291 case R_PPC_VLE_SDAREL_LO16A:
4292 case R_PPC_VLE_SDAREL_LO16D:
4293 case R_PPC_VLE_SDAREL_HI16A:
4294 case R_PPC_VLE_SDAREL_HI16D:
4295 case R_PPC_VLE_SDAREL_HA16A:
4296 case R_PPC_VLE_SDAREL_HA16D:
4297 if (h != NULL)
4298 {
4299 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4300 h->non_got_ref = TRUE;
4301 }
4302 break;
4303
4304 case R_PPC_VLE_REL8:
4305 case R_PPC_VLE_REL15:
4306 case R_PPC_VLE_REL24:
4307 case R_PPC_VLE_LO16A:
4308 case R_PPC_VLE_LO16D:
4309 case R_PPC_VLE_HI16A:
4310 case R_PPC_VLE_HI16D:
4311 case R_PPC_VLE_HA16A:
4312 case R_PPC_VLE_HA16D:
4313 case R_PPC_VLE_ADDR20:
4314 break;
4315
4316 case R_PPC_EMB_SDA2REL:
4317 if (bfd_link_pic (info))
4318 {
4319 bad_shared_reloc (abfd, r_type);
4320 return FALSE;
4321 }
4322 htab->sdata[1].sym->ref_regular = 1;
4323 if (h != NULL)
4324 {
4325 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4326 h->non_got_ref = TRUE;
4327 }
4328 break;
4329
4330 case R_PPC_VLE_SDA21_LO:
4331 case R_PPC_VLE_SDA21:
4332 case R_PPC_EMB_SDA21:
4333 case R_PPC_EMB_RELSDA:
4334 if (bfd_link_pic (info))
4335 {
4336 bad_shared_reloc (abfd, r_type);
4337 return FALSE;
4338 }
4339 if (h != NULL)
4340 {
4341 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4342 h->non_got_ref = TRUE;
4343 }
4344 break;
4345
4346 case R_PPC_EMB_NADDR32:
4347 case R_PPC_EMB_NADDR16:
4348 case R_PPC_EMB_NADDR16_LO:
4349 case R_PPC_EMB_NADDR16_HI:
4350 case R_PPC_EMB_NADDR16_HA:
4351 if (bfd_link_pic (info))
4352 {
4353 bad_shared_reloc (abfd, r_type);
4354 return FALSE;
4355 }
4356 if (h != NULL)
4357 h->non_got_ref = TRUE;
4358 break;
4359
4360 case R_PPC_PLTREL24:
4361 if (h == NULL)
4362 break;
4363 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4364 goto pltentry;
4365
4366 case R_PPC_PLTCALL:
4367 sec->has_pltcall = 1;
4368 /* Fall through. */
4369
4370 case R_PPC_PLT32:
4371 case R_PPC_PLTREL32:
4372 case R_PPC_PLT16_LO:
4373 case R_PPC_PLT16_HI:
4374 case R_PPC_PLT16_HA:
4375 pltentry:
4376 #ifdef DEBUG
4377 fprintf (stderr, "Reloc requires a PLT entry\n");
4378 #endif
4379 /* This symbol requires a procedure linkage table entry. */
4380 if (h == NULL)
4381 {
4382 pltent = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4383 NON_GOT | PLT_KEEP);
4384 if (pltent == NULL)
4385 return FALSE;
4386 }
4387 else
4388 {
4389 if (r_type != R_PPC_PLTREL24)
4390 ppc_elf_hash_entry (h)->tls_mask |= PLT_KEEP;
4391 h->needs_plt = 1;
4392 pltent = &h->plt.plist;
4393 }
4394 addend = 0;
4395 if (bfd_link_pic (info)
4396 && (r_type == R_PPC_PLTREL24
4397 || r_type == R_PPC_PLT16_LO
4398 || r_type == R_PPC_PLT16_HI
4399 || r_type == R_PPC_PLT16_HA))
4400 addend = rel->r_addend;
4401 if (!update_plt_info (abfd, pltent, got2, addend))
4402 return FALSE;
4403 break;
4404
4405 /* The following relocations don't need to propagate the
4406 relocation if linking a shared object since they are
4407 section relative. */
4408 case R_PPC_SECTOFF:
4409 case R_PPC_SECTOFF_LO:
4410 case R_PPC_SECTOFF_HI:
4411 case R_PPC_SECTOFF_HA:
4412 case R_PPC_DTPREL16:
4413 case R_PPC_DTPREL16_LO:
4414 case R_PPC_DTPREL16_HI:
4415 case R_PPC_DTPREL16_HA:
4416 case R_PPC_TOC16:
4417 break;
4418
4419 case R_PPC_REL16:
4420 case R_PPC_REL16_LO:
4421 case R_PPC_REL16_HI:
4422 case R_PPC_REL16_HA:
4423 case R_PPC_REL16DX_HA:
4424 ppc_elf_tdata (abfd)->has_rel16 = 1;
4425 break;
4426
4427 /* These are just markers. */
4428 case R_PPC_TLS:
4429 case R_PPC_EMB_MRKREF:
4430 case R_PPC_NONE:
4431 case R_PPC_max:
4432 case R_PPC_RELAX:
4433 case R_PPC_RELAX_PLT:
4434 case R_PPC_RELAX_PLTREL24:
4435 case R_PPC_16DX_HA:
4436 break;
4437
4438 /* These should only appear in dynamic objects. */
4439 case R_PPC_COPY:
4440 case R_PPC_GLOB_DAT:
4441 case R_PPC_JMP_SLOT:
4442 case R_PPC_RELATIVE:
4443 case R_PPC_IRELATIVE:
4444 break;
4445
4446 /* These aren't handled yet. We'll report an error later. */
4447 case R_PPC_ADDR30:
4448 case R_PPC_EMB_RELSEC16:
4449 case R_PPC_EMB_RELST_LO:
4450 case R_PPC_EMB_RELST_HI:
4451 case R_PPC_EMB_RELST_HA:
4452 case R_PPC_EMB_BIT_FLD:
4453 break;
4454
4455 /* This refers only to functions defined in the shared library. */
4456 case R_PPC_LOCAL24PC:
4457 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4458 {
4459 htab->plt_type = PLT_OLD;
4460 htab->old_bfd = abfd;
4461 }
4462 if (h != NULL && h->type == STT_GNU_IFUNC)
4463 {
4464 h->needs_plt = 1;
4465 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4466 return FALSE;
4467 }
4468 break;
4469
4470 /* This relocation describes the C++ object vtable hierarchy.
4471 Reconstruct it for later use during GC. */
4472 case R_PPC_GNU_VTINHERIT:
4473 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4474 return FALSE;
4475 break;
4476
4477 /* This relocation describes which C++ vtable entries are actually
4478 used. Record for later use during GC. */
4479 case R_PPC_GNU_VTENTRY:
4480 BFD_ASSERT (h != NULL);
4481 if (h != NULL
4482 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4483 return FALSE;
4484 break;
4485
4486 /* We shouldn't really be seeing TPREL32. */
4487 case R_PPC_TPREL32:
4488 case R_PPC_TPREL16:
4489 case R_PPC_TPREL16_LO:
4490 case R_PPC_TPREL16_HI:
4491 case R_PPC_TPREL16_HA:
4492 if (bfd_link_dll (info))
4493 info->flags |= DF_STATIC_TLS;
4494 goto dodyn;
4495
4496 /* Nor these. */
4497 case R_PPC_DTPMOD32:
4498 case R_PPC_DTPREL32:
4499 goto dodyn;
4500
4501 case R_PPC_REL32:
4502 if (h == NULL
4503 && got2 != NULL
4504 && (sec->flags & SEC_CODE) != 0
4505 && bfd_link_pic (info)
4506 && htab->plt_type == PLT_UNSET)
4507 {
4508 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4509 the start of a function, which assembles to a REL32
4510 reference to .got2. If we detect one of these, then
4511 force the old PLT layout because the linker cannot
4512 reliably deduce the GOT pointer value needed for
4513 PLT call stubs. */
4514 asection *s;
4515 Elf_Internal_Sym *isym;
4516
4517 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4518 abfd, r_symndx);
4519 if (isym == NULL)
4520 return FALSE;
4521
4522 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4523 if (s == got2)
4524 {
4525 htab->plt_type = PLT_OLD;
4526 htab->old_bfd = abfd;
4527 }
4528 }
4529 if (h == NULL || h == htab->elf.hgot)
4530 break;
4531 /* fall through */
4532
4533 case R_PPC_ADDR32:
4534 case R_PPC_ADDR16:
4535 case R_PPC_ADDR16_LO:
4536 case R_PPC_ADDR16_HI:
4537 case R_PPC_ADDR16_HA:
4538 case R_PPC_UADDR32:
4539 case R_PPC_UADDR16:
4540 if (h != NULL && !bfd_link_pic (info))
4541 {
4542 /* We may need a plt entry if the symbol turns out to be
4543 a function defined in a dynamic object. */
4544 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4545 return FALSE;
4546
4547 /* We may need a copy reloc too. */
4548 h->non_got_ref = 1;
4549 h->pointer_equality_needed = 1;
4550 if (r_type == R_PPC_ADDR16_HA)
4551 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4552 if (r_type == R_PPC_ADDR16_LO)
4553 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4554 }
4555 goto dodyn;
4556
4557 case R_PPC_REL24:
4558 case R_PPC_REL14:
4559 case R_PPC_REL14_BRTAKEN:
4560 case R_PPC_REL14_BRNTAKEN:
4561 if (h == NULL)
4562 break;
4563 if (h == htab->elf.hgot)
4564 {
4565 if (htab->plt_type == PLT_UNSET)
4566 {
4567 htab->plt_type = PLT_OLD;
4568 htab->old_bfd = abfd;
4569 }
4570 break;
4571 }
4572 /* fall through */
4573
4574 case R_PPC_ADDR24:
4575 case R_PPC_ADDR14:
4576 case R_PPC_ADDR14_BRTAKEN:
4577 case R_PPC_ADDR14_BRNTAKEN:
4578 if (h != NULL && !bfd_link_pic (info))
4579 {
4580 /* We may need a plt entry if the symbol turns out to be
4581 a function defined in a dynamic object. */
4582 h->needs_plt = 1;
4583 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4584 return FALSE;
4585 break;
4586 }
4587
4588 dodyn:
4589 /* If we are creating a shared library, and this is a reloc
4590 against a global symbol, or a non PC relative reloc
4591 against a local symbol, then we need to copy the reloc
4592 into the shared library. However, if we are linking with
4593 -Bsymbolic, we do not need to copy a reloc against a
4594 global symbol which is defined in an object we are
4595 including in the link (i.e., DEF_REGULAR is set). At
4596 this point we have not seen all the input files, so it is
4597 possible that DEF_REGULAR is not set now but will be set
4598 later (it is never cleared). In case of a weak definition,
4599 DEF_REGULAR may be cleared later by a strong definition in
4600 a shared library. We account for that possibility below by
4601 storing information in the dyn_relocs field of the hash
4602 table entry. A similar situation occurs when creating
4603 shared libraries and symbol visibility changes render the
4604 symbol local.
4605
4606 If on the other hand, we are creating an executable, we
4607 may need to keep relocations for symbols satisfied by a
4608 dynamic library if we manage to avoid copy relocs for the
4609 symbol. */
4610 if ((bfd_link_pic (info)
4611 && (must_be_dyn_reloc (info, r_type)
4612 || (h != NULL
4613 && (!SYMBOLIC_BIND (info, h)
4614 || h->root.type == bfd_link_hash_defweak
4615 || !h->def_regular))))
4616 || (ELIMINATE_COPY_RELOCS
4617 && !bfd_link_pic (info)
4618 && h != NULL
4619 && (h->root.type == bfd_link_hash_defweak
4620 || !h->def_regular)))
4621 {
4622 #ifdef DEBUG
4623 fprintf (stderr,
4624 "ppc_elf_check_relocs needs to "
4625 "create relocation for %s\n",
4626 (h && h->root.root.string
4627 ? h->root.root.string : "<unknown>"));
4628 #endif
4629 if (sreloc == NULL)
4630 {
4631 if (htab->elf.dynobj == NULL)
4632 htab->elf.dynobj = abfd;
4633
4634 sreloc = _bfd_elf_make_dynamic_reloc_section
4635 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4636
4637 if (sreloc == NULL)
4638 return FALSE;
4639 }
4640
4641 /* If this is a global symbol, we count the number of
4642 relocations we need for this symbol. */
4643 if (h != NULL)
4644 {
4645 struct elf_dyn_relocs *p;
4646 struct elf_dyn_relocs **rel_head;
4647
4648 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4649 p = *rel_head;
4650 if (p == NULL || p->sec != sec)
4651 {
4652 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4653 if (p == NULL)
4654 return FALSE;
4655 p->next = *rel_head;
4656 *rel_head = p;
4657 p->sec = sec;
4658 p->count = 0;
4659 p->pc_count = 0;
4660 }
4661 p->count += 1;
4662 if (!must_be_dyn_reloc (info, r_type))
4663 p->pc_count += 1;
4664 }
4665 else
4666 {
4667 /* Track dynamic relocs needed for local syms too.
4668 We really need local syms available to do this
4669 easily. Oh well. */
4670 struct ppc_dyn_relocs *p;
4671 struct ppc_dyn_relocs **rel_head;
4672 bfd_boolean is_ifunc;
4673 asection *s;
4674 void *vpp;
4675 Elf_Internal_Sym *isym;
4676
4677 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4678 abfd, r_symndx);
4679 if (isym == NULL)
4680 return FALSE;
4681
4682 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4683 if (s == NULL)
4684 s = sec;
4685
4686 vpp = &elf_section_data (s)->local_dynrel;
4687 rel_head = (struct ppc_dyn_relocs **) vpp;
4688 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4689 p = *rel_head;
4690 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4691 p = p->next;
4692 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4693 {
4694 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4695 if (p == NULL)
4696 return FALSE;
4697 p->next = *rel_head;
4698 *rel_head = p;
4699 p->sec = sec;
4700 p->ifunc = is_ifunc;
4701 p->count = 0;
4702 }
4703 p->count += 1;
4704 }
4705 }
4706
4707 break;
4708 }
4709 }
4710
4711 return TRUE;
4712 }
4713 \f
4714 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4715 and OBFD, and merge non-conflicting ones. */
4716 bfd_boolean
4717 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4718 {
4719 bfd *obfd = info->output_bfd;
4720 obj_attribute *in_attr, *in_attrs;
4721 obj_attribute *out_attr, *out_attrs;
4722 bfd_boolean ret = TRUE;
4723
4724 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4725 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4726
4727 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4728 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4729
4730 if (in_attr->i != out_attr->i)
4731 {
4732 int in_fp = in_attr->i & 3;
4733 int out_fp = out_attr->i & 3;
4734 static bfd *last_fp, *last_ld;
4735
4736 if (in_fp == 0)
4737 ;
4738 else if (out_fp == 0)
4739 {
4740 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4741 out_attr->i ^= in_fp;
4742 last_fp = ibfd;
4743 }
4744 else if (out_fp != 2 && in_fp == 2)
4745 {
4746 _bfd_error_handler
4747 /* xgettext:c-format */
4748 (_("%pB uses hard float, %pB uses soft float"),
4749 last_fp, ibfd);
4750 ret = FALSE;
4751 }
4752 else if (out_fp == 2 && in_fp != 2)
4753 {
4754 _bfd_error_handler
4755 /* xgettext:c-format */
4756 (_("%pB uses hard float, %pB uses soft float"),
4757 ibfd, last_fp);
4758 ret = FALSE;
4759 }
4760 else if (out_fp == 1 && in_fp == 3)
4761 {
4762 _bfd_error_handler
4763 /* xgettext:c-format */
4764 (_("%pB uses double-precision hard float, "
4765 "%pB uses single-precision hard float"), last_fp, ibfd);
4766 ret = FALSE;
4767 }
4768 else if (out_fp == 3 && in_fp == 1)
4769 {
4770 _bfd_error_handler
4771 /* xgettext:c-format */
4772 (_("%pB uses double-precision hard float, "
4773 "%pB uses single-precision hard float"), ibfd, last_fp);
4774 ret = FALSE;
4775 }
4776
4777 in_fp = in_attr->i & 0xc;
4778 out_fp = out_attr->i & 0xc;
4779 if (in_fp == 0)
4780 ;
4781 else if (out_fp == 0)
4782 {
4783 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4784 out_attr->i ^= in_fp;
4785 last_ld = ibfd;
4786 }
4787 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4788 {
4789 _bfd_error_handler
4790 /* xgettext:c-format */
4791 (_("%pB uses 64-bit long double, "
4792 "%pB uses 128-bit long double"), ibfd, last_ld);
4793 ret = FALSE;
4794 }
4795 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4796 {
4797 _bfd_error_handler
4798 /* xgettext:c-format */
4799 (_("%pB uses 64-bit long double, "
4800 "%pB uses 128-bit long double"), last_ld, ibfd);
4801 ret = FALSE;
4802 }
4803 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4804 {
4805 _bfd_error_handler
4806 /* xgettext:c-format */
4807 (_("%pB uses IBM long double, "
4808 "%pB uses IEEE long double"), last_ld, ibfd);
4809 ret = FALSE;
4810 }
4811 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4812 {
4813 _bfd_error_handler
4814 /* xgettext:c-format */
4815 (_("%pB uses IBM long double, "
4816 "%pB uses IEEE long double"), ibfd, last_ld);
4817 ret = FALSE;
4818 }
4819 }
4820
4821 if (!ret)
4822 {
4823 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4824 bfd_set_error (bfd_error_bad_value);
4825 }
4826 return ret;
4827 }
4828
4829 /* Merge object attributes from IBFD into OBFD. Warn if
4830 there are conflicting attributes. */
4831 static bfd_boolean
4832 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4833 {
4834 bfd *obfd;
4835 obj_attribute *in_attr, *in_attrs;
4836 obj_attribute *out_attr, *out_attrs;
4837 bfd_boolean ret;
4838
4839 if (!_bfd_elf_ppc_merge_fp_attributes (ibfd, info))
4840 return FALSE;
4841
4842 obfd = info->output_bfd;
4843 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4844 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4845
4846 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4847 merge non-conflicting ones. */
4848 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4849 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4850 ret = TRUE;
4851 if (in_attr->i != out_attr->i)
4852 {
4853 int in_vec = in_attr->i & 3;
4854 int out_vec = out_attr->i & 3;
4855 static bfd *last_vec;
4856
4857 if (in_vec == 0)
4858 ;
4859 else if (out_vec == 0)
4860 {
4861 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4862 out_attr->i = in_vec;
4863 last_vec = ibfd;
4864 }
4865 /* For now, allow generic to transition to AltiVec or SPE
4866 without a warning. If GCC marked files with their stack
4867 alignment and used don't-care markings for files which are
4868 not affected by the vector ABI, we could warn about this
4869 case too. */
4870 else if (in_vec == 1)
4871 ;
4872 else if (out_vec == 1)
4873 {
4874 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4875 out_attr->i = in_vec;
4876 last_vec = ibfd;
4877 }
4878 else if (out_vec < in_vec)
4879 {
4880 _bfd_error_handler
4881 /* xgettext:c-format */
4882 (_("%pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
4883 last_vec, ibfd);
4884 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4885 ret = FALSE;
4886 }
4887 else if (out_vec > in_vec)
4888 {
4889 _bfd_error_handler
4890 /* xgettext:c-format */
4891 (_("%pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
4892 ibfd, last_vec);
4893 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4894 ret = FALSE;
4895 }
4896 }
4897
4898 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4899 and merge non-conflicting ones. */
4900 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4901 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4902 if (in_attr->i != out_attr->i)
4903 {
4904 int in_struct = in_attr->i & 3;
4905 int out_struct = out_attr->i & 3;
4906 static bfd *last_struct;
4907
4908 if (in_struct == 0 || in_struct == 3)
4909 ;
4910 else if (out_struct == 0)
4911 {
4912 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4913 out_attr->i = in_struct;
4914 last_struct = ibfd;
4915 }
4916 else if (out_struct < in_struct)
4917 {
4918 _bfd_error_handler
4919 /* xgettext:c-format */
4920 (_("%pB uses r3/r4 for small structure returns, "
4921 "%pB uses memory"), last_struct, ibfd);
4922 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4923 ret = FALSE;
4924 }
4925 else if (out_struct > in_struct)
4926 {
4927 _bfd_error_handler
4928 /* xgettext:c-format */
4929 (_("%pB uses r3/r4 for small structure returns, "
4930 "%pB uses memory"), ibfd, last_struct);
4931 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4932 ret = FALSE;
4933 }
4934 }
4935 if (!ret)
4936 {
4937 bfd_set_error (bfd_error_bad_value);
4938 return FALSE;
4939 }
4940
4941 /* Merge Tag_compatibility attributes and any common GNU ones. */
4942 return _bfd_elf_merge_object_attributes (ibfd, info);
4943 }
4944
4945 /* Merge backend specific data from an object file to the output
4946 object file when linking. */
4947
4948 static bfd_boolean
4949 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4950 {
4951 bfd *obfd = info->output_bfd;
4952 flagword old_flags;
4953 flagword new_flags;
4954 bfd_boolean error;
4955
4956 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4957 return TRUE;
4958
4959 /* Check if we have the same endianness. */
4960 if (! _bfd_generic_verify_endian_match (ibfd, info))
4961 return FALSE;
4962
4963 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4964 return FALSE;
4965
4966 new_flags = elf_elfheader (ibfd)->e_flags;
4967 old_flags = elf_elfheader (obfd)->e_flags;
4968 if (!elf_flags_init (obfd))
4969 {
4970 /* First call, no flags set. */
4971 elf_flags_init (obfd) = TRUE;
4972 elf_elfheader (obfd)->e_flags = new_flags;
4973 }
4974
4975 /* Compatible flags are ok. */
4976 else if (new_flags == old_flags)
4977 ;
4978
4979 /* Incompatible flags. */
4980 else
4981 {
4982 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4983 to be linked with either. */
4984 error = FALSE;
4985 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4986 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4987 {
4988 error = TRUE;
4989 _bfd_error_handler
4990 (_("%pB: compiled with -mrelocatable and linked with "
4991 "modules compiled normally"), ibfd);
4992 }
4993 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4994 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4995 {
4996 error = TRUE;
4997 _bfd_error_handler
4998 (_("%pB: compiled normally and linked with "
4999 "modules compiled with -mrelocatable"), ibfd);
5000 }
5001
5002 /* The output is -mrelocatable-lib iff both the input files are. */
5003 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
5004 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
5005
5006 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
5007 but each input file is either -mrelocatable or -mrelocatable-lib. */
5008 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
5009 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
5010 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
5011 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
5012
5013 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
5014 any module uses it. */
5015 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
5016
5017 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
5018 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
5019
5020 /* Warn about any other mismatches. */
5021 if (new_flags != old_flags)
5022 {
5023 error = TRUE;
5024 _bfd_error_handler
5025 /* xgettext:c-format */
5026 (_("%pB: uses different e_flags (%#x) fields "
5027 "than previous modules (%#x)"),
5028 ibfd, new_flags, old_flags);
5029 }
5030
5031 if (error)
5032 {
5033 bfd_set_error (bfd_error_bad_value);
5034 return FALSE;
5035 }
5036 }
5037
5038 return TRUE;
5039 }
5040
5041 static void
5042 ppc_elf_vle_split16 (bfd *input_bfd,
5043 asection *input_section,
5044 unsigned long offset,
5045 bfd_byte *loc,
5046 bfd_vma value,
5047 split16_format_type split16_format,
5048 bfd_boolean fixup)
5049 {
5050 unsigned int insn, opcode, top5;
5051
5052 insn = bfd_get_32 (input_bfd, loc);
5053 opcode = insn & 0xfc00f800;
5054 if (opcode == E_OR2I_INSN
5055 || opcode == E_AND2I_DOT_INSN
5056 || opcode == E_OR2IS_INSN
5057 || opcode == E_LIS_INSN
5058 || opcode == E_AND2IS_DOT_INSN)
5059 {
5060 if (split16_format != split16a_type)
5061 {
5062 if (fixup)
5063 split16_format = split16a_type;
5064 else
5065 _bfd_error_handler
5066 /* xgettext:c-format */
5067 (_("%pB(%pA+0x%lx): expected 16A style relocation on 0x%08x insn"),
5068 input_bfd, input_section, offset, opcode);
5069 }
5070 }
5071 else if (opcode == E_ADD2I_DOT_INSN
5072 || opcode == E_ADD2IS_INSN
5073 || opcode == E_CMP16I_INSN
5074 || opcode == E_MULL2I_INSN
5075 || opcode == E_CMPL16I_INSN
5076 || opcode == E_CMPH16I_INSN
5077 || opcode == E_CMPHL16I_INSN)
5078 {
5079 if (split16_format != split16d_type)
5080 {
5081 if (fixup)
5082 split16_format = split16d_type;
5083 else
5084 _bfd_error_handler
5085 /* xgettext:c-format */
5086 (_("%pB(%pA+0x%lx): expected 16D style relocation on 0x%08x insn"),
5087 input_bfd, input_section, offset, opcode);
5088 }
5089 }
5090 top5 = value & 0xf800;
5091 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
5092 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
5093 insn |= top5;
5094 insn |= value & 0x7ff;
5095 bfd_put_32 (input_bfd, insn, loc);
5096 }
5097
5098 static void
5099 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
5100 {
5101 unsigned int insn;
5102
5103 insn = bfd_get_32 (output_bfd, loc);
5104 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
5105 /* Top 4 bits of value to 17..20. */
5106 insn |= (value & 0xf0000) >> 5;
5107 /* Next 5 bits of the value to 11..15. */
5108 insn |= (value & 0xf800) << 5;
5109 /* And the final 11 bits of the value to bits 21 to 31. */
5110 insn |= value & 0x7ff;
5111 bfd_put_32 (output_bfd, insn, loc);
5112 }
5113
5114 \f
5115 /* Choose which PLT scheme to use, and set .plt flags appropriately.
5116 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
5117 int
5118 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
5119 struct bfd_link_info *info)
5120 {
5121 struct ppc_elf_link_hash_table *htab;
5122 flagword flags;
5123
5124 htab = ppc_elf_hash_table (info);
5125
5126 if (htab->plt_type == PLT_UNSET)
5127 {
5128 struct elf_link_hash_entry *h;
5129
5130 if (htab->params->plt_style == PLT_OLD)
5131 htab->plt_type = PLT_OLD;
5132 else if (bfd_link_pic (info)
5133 && htab->elf.dynamic_sections_created
5134 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
5135 FALSE, FALSE, TRUE)) != NULL
5136 && (h->type == STT_FUNC
5137 || h->needs_plt)
5138 && h->ref_regular
5139 && !(SYMBOL_CALLS_LOCAL (info, h)
5140 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5141 {
5142 /* Profiling of shared libs (and pies) is not supported with
5143 secure plt, because ppc32 does profiling before a
5144 function prologue and a secure plt pic call stubs needs
5145 r30 to be set up. */
5146 htab->plt_type = PLT_OLD;
5147 }
5148 else
5149 {
5150 bfd *ibfd;
5151 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
5152
5153 /* Look through the reloc flags left by ppc_elf_check_relocs.
5154 Use the old style bss plt if a file makes plt calls
5155 without using the new relocs, and if ld isn't given
5156 --secure-plt and we never see REL16 relocs. */
5157 if (plt_type == PLT_UNSET)
5158 plt_type = PLT_OLD;
5159 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
5160 if (is_ppc_elf (ibfd))
5161 {
5162 if (ppc_elf_tdata (ibfd)->has_rel16)
5163 plt_type = PLT_NEW;
5164 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5165 {
5166 plt_type = PLT_OLD;
5167 htab->old_bfd = ibfd;
5168 break;
5169 }
5170 }
5171 htab->plt_type = plt_type;
5172 }
5173 }
5174 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5175 {
5176 if (htab->old_bfd != NULL)
5177 _bfd_error_handler (_("bss-plt forced due to %pB"), htab->old_bfd);
5178 else
5179 _bfd_error_handler (_("bss-plt forced by profiling"));
5180 }
5181
5182 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5183
5184 if (htab->plt_type == PLT_NEW)
5185 {
5186 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5187 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5188
5189 /* The new PLT is a loaded section. */
5190 if (htab->elf.splt != NULL
5191 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5192 return -1;
5193
5194 /* The new GOT is not executable. */
5195 if (htab->elf.sgot != NULL
5196 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5197 return -1;
5198 }
5199 else
5200 {
5201 /* Stop an unused .glink section from affecting .text alignment. */
5202 if (htab->glink != NULL
5203 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5204 return -1;
5205 }
5206 return htab->plt_type == PLT_NEW;
5207 }
5208 \f
5209 /* Return the section that should be marked against GC for a given
5210 relocation. */
5211
5212 static asection *
5213 ppc_elf_gc_mark_hook (asection *sec,
5214 struct bfd_link_info *info,
5215 Elf_Internal_Rela *rel,
5216 struct elf_link_hash_entry *h,
5217 Elf_Internal_Sym *sym)
5218 {
5219 if (h != NULL)
5220 switch (ELF32_R_TYPE (rel->r_info))
5221 {
5222 case R_PPC_GNU_VTINHERIT:
5223 case R_PPC_GNU_VTENTRY:
5224 return NULL;
5225 }
5226
5227 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5228 }
5229
5230 static bfd_boolean
5231 get_sym_h (struct elf_link_hash_entry **hp,
5232 Elf_Internal_Sym **symp,
5233 asection **symsecp,
5234 unsigned char **tls_maskp,
5235 Elf_Internal_Sym **locsymsp,
5236 unsigned long r_symndx,
5237 bfd *ibfd)
5238 {
5239 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5240
5241 if (r_symndx >= symtab_hdr->sh_info)
5242 {
5243 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5244 struct elf_link_hash_entry *h;
5245
5246 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5247 while (h->root.type == bfd_link_hash_indirect
5248 || h->root.type == bfd_link_hash_warning)
5249 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5250
5251 if (hp != NULL)
5252 *hp = h;
5253
5254 if (symp != NULL)
5255 *symp = NULL;
5256
5257 if (symsecp != NULL)
5258 {
5259 asection *symsec = NULL;
5260 if (h->root.type == bfd_link_hash_defined
5261 || h->root.type == bfd_link_hash_defweak)
5262 symsec = h->root.u.def.section;
5263 *symsecp = symsec;
5264 }
5265
5266 if (tls_maskp != NULL)
5267 *tls_maskp = &ppc_elf_hash_entry (h)->tls_mask;
5268 }
5269 else
5270 {
5271 Elf_Internal_Sym *sym;
5272 Elf_Internal_Sym *locsyms = *locsymsp;
5273
5274 if (locsyms == NULL)
5275 {
5276 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5277 if (locsyms == NULL)
5278 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5279 symtab_hdr->sh_info,
5280 0, NULL, NULL, NULL);
5281 if (locsyms == NULL)
5282 return FALSE;
5283 *locsymsp = locsyms;
5284 }
5285 sym = locsyms + r_symndx;
5286
5287 if (hp != NULL)
5288 *hp = NULL;
5289
5290 if (symp != NULL)
5291 *symp = sym;
5292
5293 if (symsecp != NULL)
5294 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5295
5296 if (tls_maskp != NULL)
5297 {
5298 bfd_signed_vma *local_got;
5299 unsigned char *tls_mask;
5300
5301 tls_mask = NULL;
5302 local_got = elf_local_got_refcounts (ibfd);
5303 if (local_got != NULL)
5304 {
5305 struct plt_entry **local_plt = (struct plt_entry **)
5306 (local_got + symtab_hdr->sh_info);
5307 unsigned char *lgot_masks = (unsigned char *)
5308 (local_plt + symtab_hdr->sh_info);
5309 tls_mask = &lgot_masks[r_symndx];
5310 }
5311 *tls_maskp = tls_mask;
5312 }
5313 }
5314 return TRUE;
5315 }
5316 \f
5317 /* Analyze inline PLT call relocations to see whether calls to locally
5318 defined functions can be converted to direct calls. */
5319
5320 bfd_boolean
5321 ppc_elf_inline_plt (struct bfd_link_info *info)
5322 {
5323 struct ppc_elf_link_hash_table *htab;
5324 bfd *ibfd;
5325 asection *sec;
5326 bfd_vma low_vma, high_vma, limit;
5327
5328 htab = ppc_elf_hash_table (info);
5329 if (htab == NULL)
5330 return FALSE;
5331
5332 /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is
5333 reduced somewhat to cater for possible stubs that might be added
5334 between the call and its destination. */
5335 limit = 0x1e00000;
5336 low_vma = -1;
5337 high_vma = 0;
5338 for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next)
5339 if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE))
5340 {
5341 if (low_vma > sec->vma)
5342 low_vma = sec->vma;
5343 if (high_vma < sec->vma + sec->size)
5344 high_vma = sec->vma + sec->size;
5345 }
5346
5347 /* If a "bl" can reach anywhere in local code sections, then we can
5348 convert all inline PLT sequences to direct calls when the symbol
5349 is local. */
5350 if (high_vma - low_vma < limit)
5351 {
5352 htab->can_convert_all_inline_plt = 1;
5353 return TRUE;
5354 }
5355
5356 /* Otherwise, go looking through relocs for cases where a direct
5357 call won't reach. Mark the symbol on any such reloc to disable
5358 the optimization and keep the PLT entry as it seems likely that
5359 this will be better than creating trampolines. Note that this
5360 will disable the optimization for all inline PLT calls to a
5361 particular symbol, not just those that won't reach. The
5362 difficulty in doing a more precise optimization is that the
5363 linker needs to make a decision depending on whether a
5364 particular R_PPC_PLTCALL insn can be turned into a direct
5365 call, for each of the R_PPC_PLTSEQ and R_PPC_PLT16* insns in
5366 the sequence, and there is nothing that ties those relocs
5367 together except their symbol. */
5368
5369 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5370 {
5371 Elf_Internal_Shdr *symtab_hdr;
5372 Elf_Internal_Sym *local_syms;
5373
5374 if (!is_ppc_elf (ibfd))
5375 continue;
5376
5377 local_syms = NULL;
5378 symtab_hdr = &elf_symtab_hdr (ibfd);
5379
5380 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5381 if (sec->has_pltcall
5382 && !bfd_is_abs_section (sec->output_section))
5383 {
5384 Elf_Internal_Rela *relstart, *rel, *relend;
5385
5386 /* Read the relocations. */
5387 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5388 info->keep_memory);
5389 if (relstart == NULL)
5390 return FALSE;
5391
5392 relend = relstart + sec->reloc_count;
5393 for (rel = relstart; rel < relend; )
5394 {
5395 enum elf_ppc_reloc_type r_type;
5396 unsigned long r_symndx;
5397 asection *sym_sec;
5398 struct elf_link_hash_entry *h;
5399 Elf_Internal_Sym *sym;
5400 unsigned char *tls_maskp;
5401
5402 r_type = ELF32_R_TYPE (rel->r_info);
5403 if (r_type != R_PPC_PLTCALL)
5404 continue;
5405
5406 r_symndx = ELF32_R_SYM (rel->r_info);
5407 if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms,
5408 r_symndx, ibfd))
5409 {
5410 if (elf_section_data (sec)->relocs != relstart)
5411 free (relstart);
5412 if (local_syms != NULL
5413 && symtab_hdr->contents != (unsigned char *) local_syms)
5414 free (local_syms);
5415 return FALSE;
5416 }
5417
5418 if (sym_sec != NULL && sym_sec->output_section != NULL)
5419 {
5420 bfd_vma from, to;
5421 if (h != NULL)
5422 to = h->root.u.def.value;
5423 else
5424 to = sym->st_value;
5425 to += (rel->r_addend
5426 + sym_sec->output_offset
5427 + sym_sec->output_section->vma);
5428 from = (rel->r_offset
5429 + sec->output_offset
5430 + sec->output_section->vma);
5431 if (to - from + limit < 2 * limit)
5432 *tls_maskp &= ~PLT_KEEP;
5433 }
5434 }
5435 if (elf_section_data (sec)->relocs != relstart)
5436 free (relstart);
5437 }
5438
5439 if (local_syms != NULL
5440 && symtab_hdr->contents != (unsigned char *) local_syms)
5441 {
5442 if (!info->keep_memory)
5443 free (local_syms);
5444 else
5445 symtab_hdr->contents = (unsigned char *) local_syms;
5446 }
5447 }
5448
5449 return TRUE;
5450 }
5451
5452 /* Set plt output section type, htab->tls_get_addr, and call the
5453 generic ELF tls_setup function. */
5454
5455 asection *
5456 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5457 {
5458 struct ppc_elf_link_hash_table *htab;
5459
5460 htab = ppc_elf_hash_table (info);
5461 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5462 FALSE, FALSE, TRUE);
5463 if (htab->plt_type != PLT_NEW)
5464 htab->params->no_tls_get_addr_opt = TRUE;
5465
5466 if (!htab->params->no_tls_get_addr_opt)
5467 {
5468 struct elf_link_hash_entry *opt, *tga;
5469 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5470 FALSE, FALSE, TRUE);
5471 if (opt != NULL
5472 && (opt->root.type == bfd_link_hash_defined
5473 || opt->root.type == bfd_link_hash_defweak))
5474 {
5475 /* If glibc supports an optimized __tls_get_addr call stub,
5476 signalled by the presence of __tls_get_addr_opt, and we'll
5477 be calling __tls_get_addr via a plt call stub, then
5478 make __tls_get_addr point to __tls_get_addr_opt. */
5479 tga = htab->tls_get_addr;
5480 if (htab->elf.dynamic_sections_created
5481 && tga != NULL
5482 && (tga->type == STT_FUNC
5483 || tga->needs_plt)
5484 && !(SYMBOL_CALLS_LOCAL (info, tga)
5485 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5486 {
5487 struct plt_entry *ent;
5488 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5489 if (ent->plt.refcount > 0)
5490 break;
5491 if (ent != NULL)
5492 {
5493 tga->root.type = bfd_link_hash_indirect;
5494 tga->root.u.i.link = &opt->root;
5495 ppc_elf_copy_indirect_symbol (info, opt, tga);
5496 opt->mark = 1;
5497 if (opt->dynindx != -1)
5498 {
5499 /* Use __tls_get_addr_opt in dynamic relocations. */
5500 opt->dynindx = -1;
5501 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5502 opt->dynstr_index);
5503 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5504 return FALSE;
5505 }
5506 htab->tls_get_addr = opt;
5507 }
5508 }
5509 }
5510 else
5511 htab->params->no_tls_get_addr_opt = TRUE;
5512 }
5513 if (htab->plt_type == PLT_NEW
5514 && htab->elf.splt != NULL
5515 && htab->elf.splt->output_section != NULL)
5516 {
5517 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5518 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5519 }
5520
5521 return _bfd_elf_tls_setup (obfd, info);
5522 }
5523
5524 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5525 HASH. */
5526
5527 static bfd_boolean
5528 branch_reloc_hash_match (const bfd *ibfd,
5529 const Elf_Internal_Rela *rel,
5530 const struct elf_link_hash_entry *hash)
5531 {
5532 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5533 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5534 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5535
5536 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5537 {
5538 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5539 struct elf_link_hash_entry *h;
5540
5541 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5542 while (h->root.type == bfd_link_hash_indirect
5543 || h->root.type == bfd_link_hash_warning)
5544 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5545 if (h == hash)
5546 return TRUE;
5547 }
5548 return FALSE;
5549 }
5550
5551 /* Run through all the TLS relocs looking for optimization
5552 opportunities. */
5553
5554 bfd_boolean
5555 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5556 struct bfd_link_info *info)
5557 {
5558 bfd *ibfd;
5559 asection *sec;
5560 struct ppc_elf_link_hash_table *htab;
5561 int pass;
5562
5563 if (!bfd_link_executable (info))
5564 return TRUE;
5565
5566 htab = ppc_elf_hash_table (info);
5567 if (htab == NULL)
5568 return FALSE;
5569
5570 /* Make two passes through the relocs. First time check that tls
5571 relocs involved in setting up a tls_get_addr call are indeed
5572 followed by such a call. If they are not, don't do any tls
5573 optimization. On the second pass twiddle tls_mask flags to
5574 notify relocate_section that optimization can be done, and
5575 adjust got and plt refcounts. */
5576 for (pass = 0; pass < 2; ++pass)
5577 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5578 {
5579 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5580 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5581
5582 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5583 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5584 {
5585 Elf_Internal_Rela *relstart, *rel, *relend;
5586 int expecting_tls_get_addr = 0;
5587
5588 /* Read the relocations. */
5589 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5590 info->keep_memory);
5591 if (relstart == NULL)
5592 return FALSE;
5593
5594 relend = relstart + sec->reloc_count;
5595 for (rel = relstart; rel < relend; rel++)
5596 {
5597 enum elf_ppc_reloc_type r_type;
5598 unsigned long r_symndx;
5599 struct elf_link_hash_entry *h = NULL;
5600 unsigned char *tls_mask;
5601 unsigned char tls_set, tls_clear;
5602 bfd_boolean is_local;
5603 bfd_signed_vma *got_count;
5604
5605 r_symndx = ELF32_R_SYM (rel->r_info);
5606 if (r_symndx >= symtab_hdr->sh_info)
5607 {
5608 struct elf_link_hash_entry **sym_hashes;
5609
5610 sym_hashes = elf_sym_hashes (ibfd);
5611 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5612 while (h->root.type == bfd_link_hash_indirect
5613 || h->root.type == bfd_link_hash_warning)
5614 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5615 }
5616
5617 is_local = FALSE;
5618 if (h == NULL
5619 || !h->def_dynamic)
5620 is_local = TRUE;
5621
5622 r_type = ELF32_R_TYPE (rel->r_info);
5623 /* If this section has old-style __tls_get_addr calls
5624 without marker relocs, then check that each
5625 __tls_get_addr call reloc is preceded by a reloc
5626 that conceivably belongs to the __tls_get_addr arg
5627 setup insn. If we don't find matching arg setup
5628 relocs, don't do any tls optimization. */
5629 if (pass == 0
5630 && sec->has_tls_get_addr_call
5631 && h != NULL
5632 && h == htab->tls_get_addr
5633 && !expecting_tls_get_addr
5634 && is_branch_reloc (r_type))
5635 {
5636 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5637 "TLS optimization disabled\n",
5638 ibfd, sec, rel->r_offset);
5639 if (elf_section_data (sec)->relocs != relstart)
5640 free (relstart);
5641 return TRUE;
5642 }
5643
5644 expecting_tls_get_addr = 0;
5645 switch (r_type)
5646 {
5647 case R_PPC_GOT_TLSLD16:
5648 case R_PPC_GOT_TLSLD16_LO:
5649 expecting_tls_get_addr = 1;
5650 /* Fall through. */
5651
5652 case R_PPC_GOT_TLSLD16_HI:
5653 case R_PPC_GOT_TLSLD16_HA:
5654 /* These relocs should never be against a symbol
5655 defined in a shared lib. Leave them alone if
5656 that turns out to be the case. */
5657 if (!is_local)
5658 continue;
5659
5660 /* LD -> LE */
5661 tls_set = 0;
5662 tls_clear = TLS_LD;
5663 break;
5664
5665 case R_PPC_GOT_TLSGD16:
5666 case R_PPC_GOT_TLSGD16_LO:
5667 expecting_tls_get_addr = 1;
5668 /* Fall through. */
5669
5670 case R_PPC_GOT_TLSGD16_HI:
5671 case R_PPC_GOT_TLSGD16_HA:
5672 if (is_local)
5673 /* GD -> LE */
5674 tls_set = 0;
5675 else
5676 /* GD -> IE */
5677 tls_set = TLS_TLS | TLS_TPRELGD;
5678 tls_clear = TLS_GD;
5679 break;
5680
5681 case R_PPC_GOT_TPREL16:
5682 case R_PPC_GOT_TPREL16_LO:
5683 case R_PPC_GOT_TPREL16_HI:
5684 case R_PPC_GOT_TPREL16_HA:
5685 if (is_local)
5686 {
5687 /* IE -> LE */
5688 tls_set = 0;
5689 tls_clear = TLS_TPREL;
5690 break;
5691 }
5692 else
5693 continue;
5694
5695 case R_PPC_TLSGD:
5696 case R_PPC_TLSLD:
5697 if (rel + 1 < relend
5698 && is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
5699 {
5700 if (pass != 0
5701 && ELF32_R_TYPE (rel[1].r_info) != R_PPC_PLTSEQ)
5702 {
5703 r_type = ELF32_R_TYPE (rel[1].r_info);
5704 r_symndx = ELF32_R_SYM (rel[1].r_info);
5705 if (r_symndx >= symtab_hdr->sh_info)
5706 {
5707 struct elf_link_hash_entry **sym_hashes;
5708
5709 sym_hashes = elf_sym_hashes (ibfd);
5710 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5711 while (h->root.type == bfd_link_hash_indirect
5712 || h->root.type == bfd_link_hash_warning)
5713 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5714 if (h != NULL)
5715 {
5716 struct plt_entry *ent = NULL;
5717 bfd_vma addend = 0;
5718
5719 if (bfd_link_pic (info))
5720 addend = rel->r_addend;
5721 ent = find_plt_ent (&h->plt.plist,
5722 got2, addend);
5723 if (ent != NULL
5724 && ent->plt.refcount > 0)
5725 ent->plt.refcount -= 1;
5726 }
5727 }
5728 }
5729 continue;
5730 }
5731 expecting_tls_get_addr = 2;
5732 tls_set = 0;
5733 tls_clear = 0;
5734 break;
5735
5736 default:
5737 continue;
5738 }
5739
5740 if (pass == 0)
5741 {
5742 if (!expecting_tls_get_addr
5743 || !sec->has_tls_get_addr_call)
5744 continue;
5745
5746 if (rel + 1 < relend
5747 && branch_reloc_hash_match (ibfd, rel + 1,
5748 htab->tls_get_addr))
5749 continue;
5750
5751 /* Uh oh, we didn't find the expected call. We
5752 could just mark this symbol to exclude it
5753 from tls optimization but it's safer to skip
5754 the entire optimization. */
5755 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5756 "TLS optimization disabled\n"),
5757 ibfd, sec, rel->r_offset);
5758 if (elf_section_data (sec)->relocs != relstart)
5759 free (relstart);
5760 return TRUE;
5761 }
5762
5763 if (h != NULL)
5764 {
5765 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5766 got_count = &h->got.refcount;
5767 }
5768 else
5769 {
5770 bfd_signed_vma *lgot_refs;
5771 struct plt_entry **local_plt;
5772 unsigned char *lgot_masks;
5773
5774 lgot_refs = elf_local_got_refcounts (ibfd);
5775 if (lgot_refs == NULL)
5776 abort ();
5777 local_plt = (struct plt_entry **)
5778 (lgot_refs + symtab_hdr->sh_info);
5779 lgot_masks = (unsigned char *)
5780 (local_plt + symtab_hdr->sh_info);
5781 tls_mask = &lgot_masks[r_symndx];
5782 got_count = &lgot_refs[r_symndx];
5783 }
5784
5785 /* If we don't have old-style __tls_get_addr calls
5786 without TLSGD/TLSLD marker relocs, and we haven't
5787 found a new-style __tls_get_addr call with a
5788 marker for this symbol, then we either have a
5789 broken object file or an -mlongcall style
5790 indirect call to __tls_get_addr without a marker.
5791 Disable optimization in this case. */
5792 if ((tls_clear & (TLS_GD | TLS_LD)) != 0
5793 && !sec->has_tls_get_addr_call
5794 && ((*tls_mask & (TLS_TLS | TLS_MARK))
5795 != (TLS_TLS | TLS_MARK)))
5796 continue;
5797
5798 if (expecting_tls_get_addr)
5799 {
5800 struct plt_entry *ent;
5801 bfd_vma addend = 0;
5802
5803 if (bfd_link_pic (info)
5804 && (ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24
5805 || ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTCALL))
5806 addend = rel[1].r_addend;
5807 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5808 got2, addend);
5809 if (ent != NULL && ent->plt.refcount > 0)
5810 ent->plt.refcount -= 1;
5811
5812 if (expecting_tls_get_addr == 2)
5813 continue;
5814 }
5815
5816 if (tls_set == 0)
5817 {
5818 /* We managed to get rid of a got entry. */
5819 if (*got_count > 0)
5820 *got_count -= 1;
5821 }
5822
5823 *tls_mask |= tls_set;
5824 *tls_mask &= ~tls_clear;
5825 }
5826
5827 if (elf_section_data (sec)->relocs != relstart)
5828 free (relstart);
5829 }
5830 }
5831 htab->do_tls_opt = 1;
5832 return TRUE;
5833 }
5834 \f
5835 /* Find dynamic relocs for H that apply to read-only sections. */
5836
5837 static asection *
5838 readonly_dynrelocs (struct elf_link_hash_entry *h)
5839 {
5840 struct elf_dyn_relocs *p;
5841
5842 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5843 {
5844 asection *s = p->sec->output_section;
5845
5846 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5847 return p->sec;
5848 }
5849 return NULL;
5850 }
5851
5852 /* Return true if we have dynamic relocs against H or any of its weak
5853 aliases, that apply to read-only sections. Cannot be used after
5854 size_dynamic_sections. */
5855
5856 static bfd_boolean
5857 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
5858 {
5859 struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h);
5860 do
5861 {
5862 if (readonly_dynrelocs (&eh->elf))
5863 return TRUE;
5864 eh = ppc_elf_hash_entry (eh->elf.u.alias);
5865 } while (eh != NULL && &eh->elf != h);
5866
5867 return FALSE;
5868 }
5869
5870 /* Return whether H has pc-relative dynamic relocs. */
5871
5872 static bfd_boolean
5873 pc_dynrelocs (struct elf_link_hash_entry *h)
5874 {
5875 struct elf_dyn_relocs *p;
5876
5877 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5878 if (p->pc_count != 0)
5879 return TRUE;
5880 return FALSE;
5881 }
5882
5883 /* Adjust a symbol defined by a dynamic object and referenced by a
5884 regular object. The current definition is in some section of the
5885 dynamic object, but we're not including those sections. We have to
5886 change the definition to something the rest of the link can
5887 understand. */
5888
5889 static bfd_boolean
5890 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5891 struct elf_link_hash_entry *h)
5892 {
5893 struct ppc_elf_link_hash_table *htab;
5894 asection *s;
5895
5896 #ifdef DEBUG
5897 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5898 h->root.root.string);
5899 #endif
5900
5901 /* Make sure we know what is going on here. */
5902 htab = ppc_elf_hash_table (info);
5903 BFD_ASSERT (htab->elf.dynobj != NULL
5904 && (h->needs_plt
5905 || h->type == STT_GNU_IFUNC
5906 || h->is_weakalias
5907 || (h->def_dynamic
5908 && h->ref_regular
5909 && !h->def_regular)));
5910
5911 /* Deal with function syms. */
5912 if (h->type == STT_FUNC
5913 || h->type == STT_GNU_IFUNC
5914 || h->needs_plt)
5915 {
5916 bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, h)
5917 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
5918 /* Discard dyn_relocs when non-pic if we've decided that a
5919 function symbol is local. */
5920 if (!bfd_link_pic (info) && local)
5921 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5922
5923 /* Clear procedure linkage table information for any symbol that
5924 won't need a .plt entry. */
5925 struct plt_entry *ent;
5926 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5927 if (ent->plt.refcount > 0)
5928 break;
5929 if (ent == NULL
5930 || (h->type != STT_GNU_IFUNC
5931 && local
5932 && (htab->can_convert_all_inline_plt
5933 || (ppc_elf_hash_entry (h)->tls_mask
5934 & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)))
5935 {
5936 /* A PLT entry is not required/allowed when:
5937
5938 1. We are not using ld.so; because then the PLT entry
5939 can't be set up, so we can't use one. In this case,
5940 ppc_elf_adjust_dynamic_symbol won't even be called.
5941
5942 2. GC has rendered the entry unused.
5943
5944 3. We know for certain that a call to this symbol
5945 will go to this object, or will remain undefined. */
5946 h->plt.plist = NULL;
5947 h->needs_plt = 0;
5948 h->pointer_equality_needed = 0;
5949 }
5950 else
5951 {
5952 /* Taking a function's address in a read/write section
5953 doesn't require us to define the function symbol in the
5954 executable on a plt call stub. A dynamic reloc can
5955 be used instead, giving better runtime performance.
5956 (Calls via that function pointer don't need to bounce
5957 through the plt call stub.) Similarly, use a dynamic
5958 reloc for a weak reference when possible, allowing the
5959 resolution of the symbol to be set at load time rather
5960 than link time. */
5961 if ((h->pointer_equality_needed
5962 || (h->non_got_ref
5963 && !h->ref_regular_nonweak
5964 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5965 && !htab->is_vxworks
5966 && !ppc_elf_hash_entry (h)->has_sda_refs
5967 && !readonly_dynrelocs (h))
5968 {
5969 h->pointer_equality_needed = 0;
5970 /* If we haven't seen a branch reloc and the symbol
5971 isn't an ifunc then we don't need a plt entry. */
5972 if (!h->needs_plt && h->type != STT_GNU_IFUNC)
5973 h->plt.plist = NULL;
5974 }
5975 else if (!bfd_link_pic (info))
5976 /* We are going to be defining the function symbol on the
5977 plt stub, so no dyn_relocs needed when non-pic. */
5978 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5979 }
5980 h->protected_def = 0;
5981 /* Function symbols can't have copy relocs. */
5982 return TRUE;
5983 }
5984 else
5985 h->plt.plist = NULL;
5986
5987 /* If this is a weak symbol, and there is a real definition, the
5988 processor independent code will have arranged for us to see the
5989 real definition first, and we can just use the same value. */
5990 if (h->is_weakalias)
5991 {
5992 struct elf_link_hash_entry *def = weakdef (h);
5993 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5994 h->root.u.def.section = def->root.u.def.section;
5995 h->root.u.def.value = def->root.u.def.value;
5996 if (def->root.u.def.section == htab->elf.sdynbss
5997 || def->root.u.def.section == htab->elf.sdynrelro
5998 || def->root.u.def.section == htab->dynsbss)
5999 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
6000 return TRUE;
6001 }
6002
6003 /* This is a reference to a symbol defined by a dynamic object which
6004 is not a function. */
6005
6006 /* If we are creating a shared library, we must presume that the
6007 only references to the symbol are via the global offset table.
6008 For such cases we need not do anything here; the relocations will
6009 be handled correctly by relocate_section. */
6010 if (bfd_link_pic (info))
6011 {
6012 h->protected_def = 0;
6013 return TRUE;
6014 }
6015
6016 /* If there are no references to this symbol that do not use the
6017 GOT, we don't need to generate a copy reloc. */
6018 if (!h->non_got_ref)
6019 {
6020 h->protected_def = 0;
6021 return TRUE;
6022 }
6023
6024 /* Protected variables do not work with .dynbss. The copy in
6025 .dynbss won't be used by the shared library with the protected
6026 definition for the variable. Editing to PIC, or text relocations
6027 are preferable to an incorrect program. */
6028 if (h->protected_def)
6029 {
6030 if (ELIMINATE_COPY_RELOCS
6031 && ppc_elf_hash_entry (h)->has_addr16_ha
6032 && ppc_elf_hash_entry (h)->has_addr16_lo
6033 && htab->params->pic_fixup == 0
6034 && info->disable_target_specific_optimizations <= 1)
6035 htab->params->pic_fixup = 1;
6036 return TRUE;
6037 }
6038
6039 /* If -z nocopyreloc was given, we won't generate them either. */
6040 if (info->nocopyreloc)
6041 return TRUE;
6042
6043 /* If we don't find any dynamic relocs in read-only sections, then
6044 we'll be keeping the dynamic relocs and avoiding the copy reloc.
6045 We can't do this if there are any small data relocations. This
6046 doesn't work on VxWorks, where we can not have dynamic
6047 relocations (other than copy and jump slot relocations) in an
6048 executable. */
6049 if (ELIMINATE_COPY_RELOCS
6050 && !ppc_elf_hash_entry (h)->has_sda_refs
6051 && !htab->is_vxworks
6052 && !h->def_regular
6053 && !alias_readonly_dynrelocs (h))
6054 return TRUE;
6055
6056 /* We must allocate the symbol in our .dynbss section, which will
6057 become part of the .bss section of the executable. There will be
6058 an entry for this symbol in the .dynsym section. The dynamic
6059 object will contain position independent code, so all references
6060 from the dynamic object to this symbol will go through the global
6061 offset table. The dynamic linker will use the .dynsym entry to
6062 determine the address it must put in the global offset table, so
6063 both the dynamic object and the regular object will refer to the
6064 same memory location for the variable.
6065
6066 Of course, if the symbol is referenced using SDAREL relocs, we
6067 must instead allocate it in .sbss. */
6068 if (ppc_elf_hash_entry (h)->has_sda_refs)
6069 s = htab->dynsbss;
6070 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
6071 s = htab->elf.sdynrelro;
6072 else
6073 s = htab->elf.sdynbss;
6074 BFD_ASSERT (s != NULL);
6075
6076 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6077 {
6078 asection *srel;
6079
6080 /* We must generate a R_PPC_COPY reloc to tell the dynamic
6081 linker to copy the initial value out of the dynamic object
6082 and into the runtime process image. */
6083 if (ppc_elf_hash_entry (h)->has_sda_refs)
6084 srel = htab->relsbss;
6085 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
6086 srel = htab->elf.sreldynrelro;
6087 else
6088 srel = htab->elf.srelbss;
6089 BFD_ASSERT (srel != NULL);
6090 srel->size += sizeof (Elf32_External_Rela);
6091 h->needs_copy = 1;
6092 }
6093
6094 /* We no longer want dyn_relocs. */
6095 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
6096 return _bfd_elf_adjust_dynamic_copy (info, h, s);
6097 }
6098 \f
6099 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
6100 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
6101 specifying the addend on the plt relocation. For -fpic code, the sym
6102 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
6103 xxxxxxxx.got2.plt_pic32.<callee>. */
6104
6105 static bfd_boolean
6106 add_stub_sym (struct plt_entry *ent,
6107 struct elf_link_hash_entry *h,
6108 struct bfd_link_info *info)
6109 {
6110 struct elf_link_hash_entry *sh;
6111 size_t len1, len2, len3;
6112 char *name;
6113 const char *stub;
6114 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6115
6116 if (bfd_link_pic (info))
6117 stub = ".plt_pic32.";
6118 else
6119 stub = ".plt_call32.";
6120
6121 len1 = strlen (h->root.root.string);
6122 len2 = strlen (stub);
6123 len3 = 0;
6124 if (ent->sec)
6125 len3 = strlen (ent->sec->name);
6126 name = bfd_malloc (len1 + len2 + len3 + 9);
6127 if (name == NULL)
6128 return FALSE;
6129 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
6130 if (ent->sec)
6131 memcpy (name + 8, ent->sec->name, len3);
6132 memcpy (name + 8 + len3, stub, len2);
6133 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
6134 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
6135 if (sh == NULL)
6136 return FALSE;
6137 if (sh->root.type == bfd_link_hash_new)
6138 {
6139 sh->root.type = bfd_link_hash_defined;
6140 sh->root.u.def.section = htab->glink;
6141 sh->root.u.def.value = ent->glink_offset;
6142 sh->ref_regular = 1;
6143 sh->def_regular = 1;
6144 sh->ref_regular_nonweak = 1;
6145 sh->forced_local = 1;
6146 sh->non_elf = 0;
6147 sh->root.linker_def = 1;
6148 }
6149 return TRUE;
6150 }
6151
6152 /* Allocate NEED contiguous space in .got, and return the offset.
6153 Handles allocation of the got header when crossing 32k. */
6154
6155 static bfd_vma
6156 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
6157 {
6158 bfd_vma where;
6159 unsigned int max_before_header;
6160
6161 if (htab->plt_type == PLT_VXWORKS)
6162 {
6163 where = htab->elf.sgot->size;
6164 htab->elf.sgot->size += need;
6165 }
6166 else
6167 {
6168 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
6169 if (need <= htab->got_gap)
6170 {
6171 where = max_before_header - htab->got_gap;
6172 htab->got_gap -= need;
6173 }
6174 else
6175 {
6176 if (htab->elf.sgot->size + need > max_before_header
6177 && htab->elf.sgot->size <= max_before_header)
6178 {
6179 htab->got_gap = max_before_header - htab->elf.sgot->size;
6180 htab->elf.sgot->size = max_before_header + htab->got_header_size;
6181 }
6182 where = htab->elf.sgot->size;
6183 htab->elf.sgot->size += need;
6184 }
6185 }
6186 return where;
6187 }
6188
6189 /* Calculate size of GOT entries for symbol given its TLS_MASK.
6190 TLS_LD is excluded because those go in a special GOT slot. */
6191
6192 static inline unsigned int
6193 got_entries_needed (int tls_mask)
6194 {
6195 unsigned int need;
6196 if ((tls_mask & TLS_TLS) == 0)
6197 need = 4;
6198 else
6199 {
6200 need = 0;
6201 if ((tls_mask & TLS_GD) != 0)
6202 need += 8;
6203 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6204 need += 4;
6205 if ((tls_mask & TLS_DTPREL) != 0)
6206 need += 4;
6207 }
6208 return need;
6209 }
6210
6211 /* Calculate size of relocs needed for symbol given its TLS_MASK and
6212 NEEDed GOT entries. KNOWN says a TPREL offset can be calculated at
6213 link time. */
6214
6215 static inline unsigned int
6216 got_relocs_needed (int tls_mask, unsigned int need, bfd_boolean known)
6217 {
6218 /* All the entries we allocated need relocs.
6219 Except IE in executable with a local symbol. We could also omit
6220 the DTPREL reloc on the second word of a GD entry under the same
6221 condition as that for IE, but ld.so needs to differentiate
6222 LD and GD entries. */
6223 if (known && (tls_mask & TLS_TLS) != 0
6224 && (tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6225 need -= 4;
6226 return need * sizeof (Elf32_External_Rela) / 4;
6227 }
6228
6229 /* If H is undefined, make it dynamic if that makes sense. */
6230
6231 static bfd_boolean
6232 ensure_undef_dynamic (struct bfd_link_info *info,
6233 struct elf_link_hash_entry *h)
6234 {
6235 struct elf_link_hash_table *htab = elf_hash_table (info);
6236
6237 if (htab->dynamic_sections_created
6238 && ((info->dynamic_undefined_weak != 0
6239 && h->root.type == bfd_link_hash_undefweak)
6240 || h->root.type == bfd_link_hash_undefined)
6241 && h->dynindx == -1
6242 && !h->forced_local
6243 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
6244 return bfd_elf_link_record_dynamic_symbol (info, h);
6245 return TRUE;
6246 }
6247
6248 /* Allocate space in associated reloc sections for dynamic relocs. */
6249
6250 static bfd_boolean
6251 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6252 {
6253 struct bfd_link_info *info = inf;
6254 struct ppc_elf_link_hash_entry *eh;
6255 struct ppc_elf_link_hash_table *htab;
6256 struct elf_dyn_relocs *p;
6257 bfd_boolean dyn;
6258
6259 if (h->root.type == bfd_link_hash_indirect)
6260 return TRUE;
6261
6262 htab = ppc_elf_hash_table (info);
6263 eh = (struct ppc_elf_link_hash_entry *) h;
6264 if (eh->elf.got.refcount > 0
6265 || (ELIMINATE_COPY_RELOCS
6266 && !eh->elf.def_regular
6267 && eh->elf.protected_def
6268 && eh->has_addr16_ha
6269 && eh->has_addr16_lo
6270 && htab->params->pic_fixup > 0))
6271 {
6272 unsigned int need;
6273
6274 /* Make sure this symbol is output as a dynamic symbol. */
6275 if (!ensure_undef_dynamic (info, &eh->elf))
6276 return FALSE;
6277
6278 need = 0;
6279 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
6280 {
6281 if (!eh->elf.def_dynamic)
6282 /* We'll just use htab->tlsld_got.offset. This should
6283 always be the case. It's a little odd if we have
6284 a local dynamic reloc against a non-local symbol. */
6285 htab->tlsld_got.refcount += 1;
6286 else
6287 need += 8;
6288 }
6289 need += got_entries_needed (eh->tls_mask);
6290 if (need == 0)
6291 eh->elf.got.offset = (bfd_vma) -1;
6292 else
6293 {
6294 eh->elf.got.offset = allocate_got (htab, need);
6295 if ((bfd_link_pic (info)
6296 || (htab->elf.dynamic_sections_created
6297 && eh->elf.dynindx != -1
6298 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
6299 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
6300 {
6301 asection *rsec;
6302 bfd_boolean tprel_known = (bfd_link_executable (info)
6303 && SYMBOL_REFERENCES_LOCAL (info,
6304 &eh->elf));
6305
6306 need = got_relocs_needed (eh->tls_mask, need, tprel_known);
6307 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD)
6308 && eh->elf.def_dynamic)
6309 need -= sizeof (Elf32_External_Rela);
6310 rsec = htab->elf.srelgot;
6311 if (eh->elf.type == STT_GNU_IFUNC)
6312 rsec = htab->elf.irelplt;
6313 rsec->size += need;
6314 }
6315 }
6316 }
6317 else
6318 eh->elf.got.offset = (bfd_vma) -1;
6319
6320 /* If no dynamic sections we can't have dynamic relocs, except for
6321 IFUNCs which are handled even in static executables. */
6322 if (!htab->elf.dynamic_sections_created
6323 && h->type != STT_GNU_IFUNC)
6324 eh->dyn_relocs = NULL;
6325
6326 /* Discard relocs on undefined symbols that must be local. */
6327 else if (h->root.type == bfd_link_hash_undefined
6328 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6329 eh->dyn_relocs = NULL;
6330
6331 /* Also discard relocs on undefined weak syms with non-default
6332 visibility, or when dynamic_undefined_weak says so. */
6333 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
6334 eh->dyn_relocs = NULL;
6335
6336 if (eh->dyn_relocs == NULL)
6337 ;
6338
6339 /* In the shared -Bsymbolic case, discard space allocated for
6340 dynamic pc-relative relocs against symbols which turn out to be
6341 defined in regular objects. For the normal shared case, discard
6342 space for relocs that have become local due to symbol visibility
6343 changes. */
6344 else if (bfd_link_pic (info))
6345 {
6346 /* Relocs that use pc_count are those that appear on a call insn,
6347 or certain REL relocs (see must_be_dyn_reloc) that can be
6348 generated via assembly. We want calls to protected symbols to
6349 resolve directly to the function rather than going via the plt.
6350 If people want function pointer comparisons to work as expected
6351 then they should avoid writing weird assembly. */
6352 if (SYMBOL_CALLS_LOCAL (info, h))
6353 {
6354 struct elf_dyn_relocs **pp;
6355
6356 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6357 {
6358 p->count -= p->pc_count;
6359 p->pc_count = 0;
6360 if (p->count == 0)
6361 *pp = p->next;
6362 else
6363 pp = &p->next;
6364 }
6365 }
6366
6367 if (htab->is_vxworks)
6368 {
6369 struct elf_dyn_relocs **pp;
6370
6371 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6372 {
6373 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6374 *pp = p->next;
6375 else
6376 pp = &p->next;
6377 }
6378 }
6379
6380 if (eh->dyn_relocs != NULL)
6381 {
6382 /* Make sure this symbol is output as a dynamic symbol. */
6383 if (!ensure_undef_dynamic (info, h))
6384 return FALSE;
6385 }
6386 }
6387 else if (ELIMINATE_COPY_RELOCS)
6388 {
6389 /* For the non-pic case, discard space for relocs against
6390 symbols which turn out to need copy relocs or are not
6391 dynamic. */
6392 if (h->dynamic_adjusted
6393 && !h->def_regular
6394 && !ELF_COMMON_DEF_P (h)
6395 && !(h->protected_def
6396 && eh->has_addr16_ha
6397 && eh->has_addr16_lo
6398 && htab->params->pic_fixup > 0))
6399 {
6400 /* Make sure this symbol is output as a dynamic symbol. */
6401 if (!ensure_undef_dynamic (info, h))
6402 return FALSE;
6403
6404 if (h->dynindx == -1)
6405 eh->dyn_relocs = NULL;
6406 }
6407 else
6408 eh->dyn_relocs = NULL;
6409 }
6410
6411 /* Allocate space. */
6412 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6413 {
6414 asection *sreloc = elf_section_data (p->sec)->sreloc;
6415 if (eh->elf.type == STT_GNU_IFUNC)
6416 sreloc = htab->elf.irelplt;
6417 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6418 }
6419
6420 /* Handle PLT relocs. Done last, after dynindx has settled.
6421 We might need a PLT entry when the symbol
6422 a) is dynamic, or
6423 b) is an ifunc, or
6424 c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or
6425 d) has plt16 relocs and we are linking statically. */
6426 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6427 if (dyn
6428 || h->type == STT_GNU_IFUNC
6429 || (h->needs_plt && h->dynamic_adjusted)
6430 || (h->needs_plt
6431 && h->def_regular
6432 && !htab->elf.dynamic_sections_created
6433 && !htab->can_convert_all_inline_plt
6434 && (ppc_elf_hash_entry (h)->tls_mask
6435 & (TLS_TLS | PLT_KEEP)) == PLT_KEEP))
6436 {
6437 struct plt_entry *ent;
6438 bfd_boolean doneone = FALSE;
6439 bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
6440
6441 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6442 if (ent->plt.refcount > 0)
6443 {
6444 asection *s = htab->elf.splt;
6445
6446 if (!dyn)
6447 {
6448 if (h->type == STT_GNU_IFUNC)
6449 s = htab->elf.iplt;
6450 else
6451 s = htab->pltlocal;
6452 }
6453
6454 if (htab->plt_type == PLT_NEW || !dyn)
6455 {
6456 if (!doneone)
6457 {
6458 plt_offset = s->size;
6459 s->size += 4;
6460 }
6461 ent->plt.offset = plt_offset;
6462
6463 if (s == htab->pltlocal)
6464 ent->glink_offset = glink_offset;
6465 else
6466 {
6467 s = htab->glink;
6468 if (!doneone || bfd_link_pic (info))
6469 {
6470 glink_offset = s->size;
6471 s->size += GLINK_ENTRY_SIZE (htab, h);
6472 }
6473 if (!doneone
6474 && !bfd_link_pic (info)
6475 && h->def_dynamic
6476 && !h->def_regular)
6477 {
6478 h->root.u.def.section = s;
6479 h->root.u.def.value = glink_offset;
6480 }
6481 ent->glink_offset = glink_offset;
6482
6483 if (htab->params->emit_stub_syms
6484 && !add_stub_sym (ent, h, info))
6485 return FALSE;
6486 }
6487 }
6488 else
6489 {
6490 if (!doneone)
6491 {
6492 /* If this is the first .plt entry, make room
6493 for the special first entry. */
6494 if (s->size == 0)
6495 s->size += htab->plt_initial_entry_size;
6496
6497 /* The PowerPC PLT is actually composed of two
6498 parts, the first part is 2 words (for a load
6499 and a jump), and then there is a remaining
6500 word available at the end. */
6501 plt_offset = (htab->plt_initial_entry_size
6502 + (htab->plt_slot_size
6503 * ((s->size
6504 - htab->plt_initial_entry_size)
6505 / htab->plt_entry_size)));
6506
6507 /* If this symbol is not defined in a regular
6508 file, and we are not generating a shared
6509 library, then set the symbol to this location
6510 in the .plt. This is to avoid text
6511 relocations, and is required to make
6512 function pointers compare as equal between
6513 the normal executable and the shared library. */
6514 if (! bfd_link_pic (info)
6515 && h->def_dynamic
6516 && !h->def_regular)
6517 {
6518 h->root.u.def.section = s;
6519 h->root.u.def.value = plt_offset;
6520 }
6521
6522 /* Make room for this entry. */
6523 s->size += htab->plt_entry_size;
6524 /* After the 8192nd entry, room for two entries
6525 is allocated. */
6526 if (htab->plt_type == PLT_OLD
6527 && (s->size - htab->plt_initial_entry_size)
6528 / htab->plt_entry_size
6529 > PLT_NUM_SINGLE_ENTRIES)
6530 s->size += htab->plt_entry_size;
6531 }
6532 ent->plt.offset = plt_offset;
6533 }
6534
6535 /* We also need to make an entry in the .rela.plt section. */
6536 if (!doneone)
6537 {
6538 if (!dyn)
6539 {
6540 if (h->type == STT_GNU_IFUNC)
6541 {
6542 s = htab->elf.irelplt;
6543 s->size += sizeof (Elf32_External_Rela);
6544 }
6545 else if (bfd_link_pic (info))
6546 {
6547 s = htab->relpltlocal;
6548 s->size += sizeof (Elf32_External_Rela);
6549 }
6550 }
6551 else
6552 {
6553 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6554
6555 if (htab->plt_type == PLT_VXWORKS)
6556 {
6557 /* Allocate space for the unloaded relocations. */
6558 if (!bfd_link_pic (info)
6559 && htab->elf.dynamic_sections_created)
6560 {
6561 if (ent->plt.offset
6562 == (bfd_vma) htab->plt_initial_entry_size)
6563 {
6564 htab->srelplt2->size
6565 += (sizeof (Elf32_External_Rela)
6566 * VXWORKS_PLTRESOLVE_RELOCS);
6567 }
6568
6569 htab->srelplt2->size
6570 += (sizeof (Elf32_External_Rela)
6571 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6572 }
6573
6574 /* Every PLT entry has an associated GOT entry in
6575 .got.plt. */
6576 htab->elf.sgotplt->size += 4;
6577 }
6578 }
6579 doneone = TRUE;
6580 }
6581 }
6582 else
6583 ent->plt.offset = (bfd_vma) -1;
6584
6585 if (!doneone)
6586 {
6587 h->plt.plist = NULL;
6588 h->needs_plt = 0;
6589 }
6590 }
6591 else
6592 {
6593 h->plt.plist = NULL;
6594 h->needs_plt = 0;
6595 }
6596
6597 return TRUE;
6598 }
6599
6600 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6601 read-only sections. */
6602
6603 static bfd_boolean
6604 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6605 {
6606 asection *sec;
6607
6608 if (h->root.type == bfd_link_hash_indirect)
6609 return TRUE;
6610
6611 sec = readonly_dynrelocs (h);
6612 if (sec != NULL)
6613 {
6614 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
6615
6616 info->flags |= DF_TEXTREL;
6617 info->callbacks->minfo
6618 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
6619 sec->owner, h->root.root.string, sec);
6620
6621 /* Not an error, just cut short the traversal. */
6622 return FALSE;
6623 }
6624 return TRUE;
6625 }
6626
6627 static const unsigned char glink_eh_frame_cie[] =
6628 {
6629 0, 0, 0, 16, /* length. */
6630 0, 0, 0, 0, /* id. */
6631 1, /* CIE version. */
6632 'z', 'R', 0, /* Augmentation string. */
6633 4, /* Code alignment. */
6634 0x7c, /* Data alignment. */
6635 65, /* RA reg. */
6636 1, /* Augmentation size. */
6637 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6638 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6639 };
6640
6641 /* Set the sizes of the dynamic sections. */
6642
6643 static bfd_boolean
6644 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6645 struct bfd_link_info *info)
6646 {
6647 struct ppc_elf_link_hash_table *htab;
6648 asection *s;
6649 bfd_boolean relocs;
6650 bfd *ibfd;
6651
6652 #ifdef DEBUG
6653 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6654 #endif
6655
6656 htab = ppc_elf_hash_table (info);
6657 BFD_ASSERT (htab->elf.dynobj != NULL);
6658
6659 if (elf_hash_table (info)->dynamic_sections_created)
6660 {
6661 /* Set the contents of the .interp section to the interpreter. */
6662 if (bfd_link_executable (info) && !info->nointerp)
6663 {
6664 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6665 BFD_ASSERT (s != NULL);
6666 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6667 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6668 }
6669 }
6670
6671 if (htab->plt_type == PLT_OLD)
6672 htab->got_header_size = 16;
6673 else if (htab->plt_type == PLT_NEW)
6674 htab->got_header_size = 12;
6675
6676 /* Set up .got offsets for local syms, and space for local dynamic
6677 relocs. */
6678 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6679 {
6680 bfd_signed_vma *local_got;
6681 bfd_signed_vma *end_local_got;
6682 struct plt_entry **local_plt;
6683 struct plt_entry **end_local_plt;
6684 char *lgot_masks;
6685 bfd_size_type locsymcount;
6686 Elf_Internal_Shdr *symtab_hdr;
6687
6688 if (!is_ppc_elf (ibfd))
6689 continue;
6690
6691 for (s = ibfd->sections; s != NULL; s = s->next)
6692 {
6693 struct ppc_dyn_relocs *p;
6694
6695 for (p = ((struct ppc_dyn_relocs *)
6696 elf_section_data (s)->local_dynrel);
6697 p != NULL;
6698 p = p->next)
6699 {
6700 if (!bfd_is_abs_section (p->sec)
6701 && bfd_is_abs_section (p->sec->output_section))
6702 {
6703 /* Input section has been discarded, either because
6704 it is a copy of a linkonce section or due to
6705 linker script /DISCARD/, so we'll be discarding
6706 the relocs too. */
6707 }
6708 else if (htab->is_vxworks
6709 && strcmp (p->sec->output_section->name,
6710 ".tls_vars") == 0)
6711 {
6712 /* Relocations in vxworks .tls_vars sections are
6713 handled specially by the loader. */
6714 }
6715 else if (p->count != 0)
6716 {
6717 asection *sreloc = elf_section_data (p->sec)->sreloc;
6718 if (p->ifunc)
6719 sreloc = htab->elf.irelplt;
6720 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6721 if ((p->sec->output_section->flags
6722 & (SEC_READONLY | SEC_ALLOC))
6723 == (SEC_READONLY | SEC_ALLOC))
6724 {
6725 info->flags |= DF_TEXTREL;
6726 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
6727 p->sec->owner, p->sec);
6728 }
6729 }
6730 }
6731 }
6732
6733 local_got = elf_local_got_refcounts (ibfd);
6734 if (!local_got)
6735 continue;
6736
6737 symtab_hdr = &elf_symtab_hdr (ibfd);
6738 locsymcount = symtab_hdr->sh_info;
6739 end_local_got = local_got + locsymcount;
6740 local_plt = (struct plt_entry **) end_local_got;
6741 end_local_plt = local_plt + locsymcount;
6742 lgot_masks = (char *) end_local_plt;
6743
6744 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6745 if (*local_got > 0)
6746 {
6747 unsigned int need;
6748 if ((*lgot_masks & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
6749 htab->tlsld_got.refcount += 1;
6750 need = got_entries_needed (*lgot_masks);
6751 if (need == 0)
6752 *local_got = (bfd_vma) -1;
6753 else
6754 {
6755 *local_got = allocate_got (htab, need);
6756 if (bfd_link_pic (info))
6757 {
6758 asection *srel;
6759 bfd_boolean tprel_known = bfd_link_executable (info);
6760
6761 need = got_relocs_needed (*lgot_masks, need, tprel_known);
6762 srel = htab->elf.srelgot;
6763 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6764 srel = htab->elf.irelplt;
6765 srel->size += need;
6766 }
6767 }
6768 }
6769 else
6770 *local_got = (bfd_vma) -1;
6771
6772 if (htab->is_vxworks)
6773 continue;
6774
6775 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6776 lgot_masks = (char *) end_local_plt;
6777 for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks)
6778 {
6779 struct plt_entry *ent;
6780 bfd_boolean doneone = FALSE;
6781 bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
6782
6783 for (ent = *local_plt; ent != NULL; ent = ent->next)
6784 if (ent->plt.refcount > 0)
6785 {
6786 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6787 s = htab->elf.iplt;
6788 else if (htab->can_convert_all_inline_plt
6789 || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)
6790 {
6791 ent->plt.offset = (bfd_vma) -1;
6792 continue;
6793 }
6794 else
6795 s = htab->pltlocal;
6796
6797 if (!doneone)
6798 {
6799 plt_offset = s->size;
6800 s->size += 4;
6801 }
6802 ent->plt.offset = plt_offset;
6803
6804 if (s != htab->pltlocal && (!doneone || bfd_link_pic (info)))
6805 {
6806 s = htab->glink;
6807 glink_offset = s->size;
6808 s->size += GLINK_ENTRY_SIZE (htab, NULL);
6809 }
6810 ent->glink_offset = glink_offset;
6811
6812 if (!doneone)
6813 {
6814 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6815 {
6816 s = htab->elf.irelplt;
6817 s->size += sizeof (Elf32_External_Rela);
6818 }
6819 else if (bfd_link_pic (info))
6820 {
6821 s = htab->relpltlocal;
6822 s->size += sizeof (Elf32_External_Rela);
6823 }
6824 doneone = TRUE;
6825 }
6826 }
6827 else
6828 ent->plt.offset = (bfd_vma) -1;
6829 }
6830 }
6831
6832 /* Allocate space for global sym dynamic relocs. */
6833 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6834
6835 if (htab->tlsld_got.refcount > 0)
6836 {
6837 htab->tlsld_got.offset = allocate_got (htab, 8);
6838 if (bfd_link_pic (info))
6839 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6840 }
6841 else
6842 htab->tlsld_got.offset = (bfd_vma) -1;
6843
6844 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6845 {
6846 unsigned int g_o_t = 32768;
6847
6848 /* If we haven't allocated the header, do so now. When we get here,
6849 for old plt/got the got size will be 0 to 32764 (not allocated),
6850 or 32780 to 65536 (header allocated). For new plt/got, the
6851 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6852 if (htab->elf.sgot->size <= 32768)
6853 {
6854 g_o_t = htab->elf.sgot->size;
6855 if (htab->plt_type == PLT_OLD)
6856 g_o_t += 4;
6857 htab->elf.sgot->size += htab->got_header_size;
6858 }
6859
6860 htab->elf.hgot->root.u.def.value = g_o_t;
6861 }
6862 if (bfd_link_pic (info))
6863 {
6864 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6865
6866 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6867 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6868 }
6869 if (info->emitrelocations)
6870 {
6871 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6872
6873 if (sda != NULL && sda->ref_regular)
6874 sda->root.u.def.section->flags |= SEC_KEEP;
6875 sda = htab->sdata[1].sym;
6876 if (sda != NULL && sda->ref_regular)
6877 sda->root.u.def.section->flags |= SEC_KEEP;
6878 }
6879
6880 if (htab->glink != NULL
6881 && htab->glink->size != 0
6882 && htab->elf.dynamic_sections_created)
6883 {
6884 htab->glink_pltresolve = htab->glink->size;
6885 /* Space for the branch table. */
6886 htab->glink->size
6887 += htab->elf.srelplt->size / (sizeof (Elf32_External_Rela) / 4) - 4;
6888 /* Pad out to align the start of PLTresolve. */
6889 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6890 ? 63 : 15);
6891 htab->glink->size += GLINK_PLTRESOLVE;
6892
6893 if (htab->params->emit_stub_syms)
6894 {
6895 struct elf_link_hash_entry *sh;
6896 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6897 TRUE, FALSE, FALSE);
6898 if (sh == NULL)
6899 return FALSE;
6900 if (sh->root.type == bfd_link_hash_new)
6901 {
6902 sh->root.type = bfd_link_hash_defined;
6903 sh->root.u.def.section = htab->glink;
6904 sh->root.u.def.value = htab->glink_pltresolve;
6905 sh->ref_regular = 1;
6906 sh->def_regular = 1;
6907 sh->ref_regular_nonweak = 1;
6908 sh->forced_local = 1;
6909 sh->non_elf = 0;
6910 sh->root.linker_def = 1;
6911 }
6912 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6913 TRUE, FALSE, FALSE);
6914 if (sh == NULL)
6915 return FALSE;
6916 if (sh->root.type == bfd_link_hash_new)
6917 {
6918 sh->root.type = bfd_link_hash_defined;
6919 sh->root.u.def.section = htab->glink;
6920 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6921 sh->ref_regular = 1;
6922 sh->def_regular = 1;
6923 sh->ref_regular_nonweak = 1;
6924 sh->forced_local = 1;
6925 sh->non_elf = 0;
6926 sh->root.linker_def = 1;
6927 }
6928 }
6929 }
6930
6931 if (htab->glink != NULL
6932 && htab->glink->size != 0
6933 && htab->glink_eh_frame != NULL
6934 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6935 && _bfd_elf_eh_frame_present (info))
6936 {
6937 s = htab->glink_eh_frame;
6938 s->size = sizeof (glink_eh_frame_cie) + 20;
6939 if (bfd_link_pic (info))
6940 {
6941 s->size += 4;
6942 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6943 s->size += 4;
6944 }
6945 }
6946
6947 /* We've now determined the sizes of the various dynamic sections.
6948 Allocate memory for them. */
6949 relocs = FALSE;
6950 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6951 {
6952 bfd_boolean strip_section = TRUE;
6953
6954 if ((s->flags & SEC_LINKER_CREATED) == 0)
6955 continue;
6956
6957 if (s == htab->elf.splt
6958 || s == htab->elf.sgot)
6959 {
6960 /* We'd like to strip these sections if they aren't needed, but if
6961 we've exported dynamic symbols from them we must leave them.
6962 It's too late to tell BFD to get rid of the symbols. */
6963 if (htab->elf.hplt != NULL)
6964 strip_section = FALSE;
6965 /* Strip this section if we don't need it; see the
6966 comment below. */
6967 }
6968 else if (s == htab->elf.iplt
6969 || s == htab->pltlocal
6970 || s == htab->glink
6971 || s == htab->glink_eh_frame
6972 || s == htab->elf.sgotplt
6973 || s == htab->sbss
6974 || s == htab->elf.sdynbss
6975 || s == htab->elf.sdynrelro
6976 || s == htab->dynsbss)
6977 {
6978 /* Strip these too. */
6979 }
6980 else if (s == htab->sdata[0].section
6981 || s == htab->sdata[1].section)
6982 {
6983 strip_section = (s->flags & SEC_KEEP) == 0;
6984 }
6985 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6986 ".rela"))
6987 {
6988 if (s->size != 0)
6989 {
6990 /* Remember whether there are any relocation sections. */
6991 relocs = TRUE;
6992
6993 /* We use the reloc_count field as a counter if we need
6994 to copy relocs into the output file. */
6995 s->reloc_count = 0;
6996 }
6997 }
6998 else
6999 {
7000 /* It's not one of our sections, so don't allocate space. */
7001 continue;
7002 }
7003
7004 if (s->size == 0 && strip_section)
7005 {
7006 /* If we don't need this section, strip it from the
7007 output file. This is mostly to handle .rela.bss and
7008 .rela.plt. We must create both sections in
7009 create_dynamic_sections, because they must be created
7010 before the linker maps input sections to output
7011 sections. The linker does that before
7012 adjust_dynamic_symbol is called, and it is that
7013 function which decides whether anything needs to go
7014 into these sections. */
7015 s->flags |= SEC_EXCLUDE;
7016 continue;
7017 }
7018
7019 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7020 continue;
7021
7022 /* Allocate memory for the section contents. */
7023 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
7024 if (s->contents == NULL)
7025 return FALSE;
7026 }
7027
7028 if (htab->elf.dynamic_sections_created)
7029 {
7030 /* Add some entries to the .dynamic section. We fill in the
7031 values later, in ppc_elf_finish_dynamic_sections, but we
7032 must add the entries now so that we get the correct size for
7033 the .dynamic section. The DT_DEBUG entry is filled in by the
7034 dynamic linker and used by the debugger. */
7035 #define add_dynamic_entry(TAG, VAL) \
7036 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7037
7038 if (bfd_link_executable (info))
7039 {
7040 if (!add_dynamic_entry (DT_DEBUG, 0))
7041 return FALSE;
7042 }
7043
7044 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
7045 {
7046 if (!add_dynamic_entry (DT_PLTGOT, 0)
7047 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7048 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7049 || !add_dynamic_entry (DT_JMPREL, 0))
7050 return FALSE;
7051 }
7052
7053 if (htab->plt_type == PLT_NEW
7054 && htab->glink != NULL
7055 && htab->glink->size != 0)
7056 {
7057 if (!add_dynamic_entry (DT_PPC_GOT, 0))
7058 return FALSE;
7059 if (!htab->params->no_tls_get_addr_opt
7060 && htab->tls_get_addr != NULL
7061 && htab->tls_get_addr->plt.plist != NULL
7062 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
7063 return FALSE;
7064 }
7065
7066 if (relocs)
7067 {
7068 if (!add_dynamic_entry (DT_RELA, 0)
7069 || !add_dynamic_entry (DT_RELASZ, 0)
7070 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
7071 return FALSE;
7072 }
7073
7074 /* If any dynamic relocs apply to a read-only section, then we
7075 need a DT_TEXTREL entry. */
7076 if ((info->flags & DF_TEXTREL) == 0)
7077 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
7078 info);
7079
7080 if ((info->flags & DF_TEXTREL) != 0)
7081 {
7082 if (!add_dynamic_entry (DT_TEXTREL, 0))
7083 return FALSE;
7084 }
7085 if (htab->is_vxworks
7086 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
7087 return FALSE;
7088 }
7089 #undef add_dynamic_entry
7090
7091 if (htab->glink_eh_frame != NULL
7092 && htab->glink_eh_frame->contents != NULL)
7093 {
7094 unsigned char *p = htab->glink_eh_frame->contents;
7095 bfd_vma val;
7096
7097 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
7098 /* CIE length (rewrite in case little-endian). */
7099 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
7100 p += sizeof (glink_eh_frame_cie);
7101 /* FDE length. */
7102 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
7103 bfd_put_32 (htab->elf.dynobj, val, p);
7104 p += 4;
7105 /* CIE pointer. */
7106 val = p - htab->glink_eh_frame->contents;
7107 bfd_put_32 (htab->elf.dynobj, val, p);
7108 p += 4;
7109 /* Offset to .glink. Set later. */
7110 p += 4;
7111 /* .glink size. */
7112 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
7113 p += 4;
7114 /* Augmentation. */
7115 p += 1;
7116
7117 if (bfd_link_pic (info)
7118 && htab->elf.dynamic_sections_created)
7119 {
7120 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
7121 if (adv < 64)
7122 *p++ = DW_CFA_advance_loc + adv;
7123 else if (adv < 256)
7124 {
7125 *p++ = DW_CFA_advance_loc1;
7126 *p++ = adv;
7127 }
7128 else if (adv < 65536)
7129 {
7130 *p++ = DW_CFA_advance_loc2;
7131 bfd_put_16 (htab->elf.dynobj, adv, p);
7132 p += 2;
7133 }
7134 else
7135 {
7136 *p++ = DW_CFA_advance_loc4;
7137 bfd_put_32 (htab->elf.dynobj, adv, p);
7138 p += 4;
7139 }
7140 *p++ = DW_CFA_register;
7141 *p++ = 65;
7142 p++;
7143 *p++ = DW_CFA_advance_loc + 4;
7144 *p++ = DW_CFA_restore_extended;
7145 *p++ = 65;
7146 }
7147 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
7148 == htab->glink_eh_frame->size);
7149 }
7150
7151 return TRUE;
7152 }
7153
7154 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
7155 if it looks like nothing is using them. */
7156
7157 static void
7158 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
7159 {
7160 struct elf_link_hash_entry *sda = lsect->sym;
7161
7162 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
7163 {
7164 asection *s;
7165
7166 s = bfd_get_section_by_name (output_bfd, lsect->name);
7167 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
7168 {
7169 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
7170 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
7171 {
7172 sda->def_regular = 0;
7173 /* This is somewhat magic. See elf_link_output_extsym. */
7174 sda->ref_dynamic = 1;
7175 sda->forced_local = 0;
7176 }
7177 }
7178 }
7179 }
7180
7181 void
7182 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
7183 {
7184 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7185
7186 if (htab != NULL)
7187 {
7188 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
7189 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
7190 }
7191 }
7192
7193
7194 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
7195
7196 static bfd_boolean
7197 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
7198 {
7199 if (h->plt.plist != NULL
7200 && !h->def_regular
7201 && (!h->pointer_equality_needed
7202 || !h->ref_regular_nonweak))
7203 return FALSE;
7204
7205 return _bfd_elf_hash_symbol (h);
7206 }
7207 \f
7208 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
7209
7210 /* Relaxation trampolines. r12 is available for clobbering (r11, is
7211 used for some functions that are allowed to break the ABI). */
7212 static const int shared_stub_entry[] =
7213 {
7214 0x7c0802a6, /* mflr 0 */
7215 0x429f0005, /* bcl 20, 31, .Lxxx */
7216 0x7d8802a6, /* mflr 12 */
7217 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
7218 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
7219 0x7c0803a6, /* mtlr 0 */
7220 0x7d8903a6, /* mtctr 12 */
7221 0x4e800420, /* bctr */
7222 };
7223
7224 static const int stub_entry[] =
7225 {
7226 0x3d800000, /* lis 12,xxx@ha */
7227 0x398c0000, /* addi 12,12,xxx@l */
7228 0x7d8903a6, /* mtctr 12 */
7229 0x4e800420, /* bctr */
7230 };
7231
7232 struct ppc_elf_relax_info
7233 {
7234 unsigned int workaround_size;
7235 unsigned int picfixup_size;
7236 };
7237
7238 /* This function implements long branch trampolines, and the ppc476
7239 icache bug workaround. Any section needing trampolines or patch
7240 space for the workaround has its size extended so that we can
7241 add trampolines at the end of the section. */
7242
7243 static bfd_boolean
7244 ppc_elf_relax_section (bfd *abfd,
7245 asection *isec,
7246 struct bfd_link_info *link_info,
7247 bfd_boolean *again)
7248 {
7249 struct one_branch_fixup
7250 {
7251 struct one_branch_fixup *next;
7252 asection *tsec;
7253 /* Final link, can use the symbol offset. For a
7254 relocatable link we use the symbol's index. */
7255 bfd_vma toff;
7256 bfd_vma trampoff;
7257 };
7258
7259 Elf_Internal_Shdr *symtab_hdr;
7260 bfd_byte *contents = NULL;
7261 Elf_Internal_Sym *isymbuf = NULL;
7262 Elf_Internal_Rela *internal_relocs = NULL;
7263 Elf_Internal_Rela *irel, *irelend = NULL;
7264 struct one_branch_fixup *branch_fixups = NULL;
7265 struct ppc_elf_relax_info *relax_info = NULL;
7266 unsigned changes = 0;
7267 bfd_boolean workaround_change;
7268 struct ppc_elf_link_hash_table *htab;
7269 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
7270 asection *got2;
7271 bfd_boolean maybe_pasted;
7272
7273 *again = FALSE;
7274
7275 /* No need to do anything with non-alloc or non-code sections. */
7276 if ((isec->flags & SEC_ALLOC) == 0
7277 || (isec->flags & SEC_CODE) == 0
7278 || (isec->flags & SEC_LINKER_CREATED) != 0
7279 || isec->size < 4)
7280 return TRUE;
7281
7282 /* We cannot represent the required PIC relocs in the output, so don't
7283 do anything. The linker doesn't support mixing -shared and -r
7284 anyway. */
7285 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
7286 return TRUE;
7287
7288 htab = ppc_elf_hash_table (link_info);
7289 if (htab == NULL)
7290 return TRUE;
7291
7292 isec->size = (isec->size + 3) & -4;
7293 if (isec->rawsize == 0)
7294 isec->rawsize = isec->size;
7295 trampbase = isec->size;
7296
7297 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
7298 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
7299 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
7300
7301 if (htab->params->ppc476_workaround
7302 || htab->params->pic_fixup > 0)
7303 {
7304 if (elf_section_data (isec)->sec_info == NULL)
7305 {
7306 elf_section_data (isec)->sec_info
7307 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
7308 if (elf_section_data (isec)->sec_info == NULL)
7309 return FALSE;
7310 }
7311 relax_info = elf_section_data (isec)->sec_info;
7312 trampbase -= relax_info->workaround_size;
7313 }
7314
7315 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
7316 || strcmp (isec->output_section->name, ".fini") == 0);
7317 /* Space for a branch around any trampolines. */
7318 trampoff = trampbase;
7319 if (maybe_pasted && trampbase == isec->rawsize)
7320 trampoff += 4;
7321
7322 symtab_hdr = &elf_symtab_hdr (abfd);
7323 picfixup_size = 0;
7324 if (htab->params->branch_trampolines
7325 || htab->params->pic_fixup > 0)
7326 {
7327 /* Get a copy of the native relocations. */
7328 if (isec->reloc_count != 0)
7329 {
7330 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
7331 link_info->keep_memory);
7332 if (internal_relocs == NULL)
7333 goto error_return;
7334 }
7335
7336 got2 = bfd_get_section_by_name (abfd, ".got2");
7337
7338 irelend = internal_relocs + isec->reloc_count;
7339 for (irel = internal_relocs; irel < irelend; irel++)
7340 {
7341 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7342 bfd_vma toff, roff;
7343 asection *tsec;
7344 struct one_branch_fixup *f;
7345 size_t insn_offset = 0;
7346 bfd_vma max_branch_offset = 0, val;
7347 bfd_byte *hit_addr;
7348 unsigned long t0;
7349 struct elf_link_hash_entry *h;
7350 Elf_Internal_Sym *isym;
7351 struct plt_entry **plist;
7352 unsigned char sym_type;
7353
7354 switch (r_type)
7355 {
7356 case R_PPC_REL24:
7357 case R_PPC_LOCAL24PC:
7358 case R_PPC_PLTREL24:
7359 case R_PPC_PLTCALL:
7360 max_branch_offset = 1 << 25;
7361 break;
7362
7363 case R_PPC_REL14:
7364 case R_PPC_REL14_BRTAKEN:
7365 case R_PPC_REL14_BRNTAKEN:
7366 max_branch_offset = 1 << 15;
7367 break;
7368
7369 case R_PPC_ADDR16_HA:
7370 if (htab->params->pic_fixup > 0)
7371 break;
7372 continue;
7373
7374 default:
7375 continue;
7376 }
7377
7378 /* Get the value of the symbol referred to by the reloc. */
7379 if (!get_sym_h (&h, &isym, &tsec, NULL, &isymbuf,
7380 ELF32_R_SYM (irel->r_info), abfd))
7381 goto error_return;
7382
7383 if (isym != NULL)
7384 {
7385 if (tsec != NULL)
7386 ;
7387 else if (isym->st_shndx == SHN_UNDEF)
7388 tsec = bfd_und_section_ptr;
7389 else if (isym->st_shndx == SHN_ABS)
7390 tsec = bfd_abs_section_ptr;
7391 else if (isym->st_shndx == SHN_COMMON)
7392 tsec = bfd_com_section_ptr;
7393
7394 toff = isym->st_value;
7395 sym_type = ELF_ST_TYPE (isym->st_info);
7396 }
7397 else
7398 {
7399 if (tsec != NULL)
7400 toff = h->root.u.def.value;
7401 else if (h->root.type == bfd_link_hash_undefined
7402 || h->root.type == bfd_link_hash_undefweak)
7403 {
7404 unsigned long indx;
7405
7406 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7407 tsec = bfd_und_section_ptr;
7408 toff = bfd_link_relocatable (link_info) ? indx : 0;
7409 }
7410 else
7411 continue;
7412
7413 /* If this branch is to __tls_get_addr then we may later
7414 optimise away the call. We won't be needing a long-
7415 branch stub in that case. */
7416 if (bfd_link_executable (link_info)
7417 && h == htab->tls_get_addr
7418 && irel != internal_relocs)
7419 {
7420 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7421 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7422 unsigned int tls_mask = 0;
7423
7424 /* The previous reloc should be one of R_PPC_TLSGD or
7425 R_PPC_TLSLD, or for older object files, a reloc
7426 on the __tls_get_addr arg setup insn. Get tls
7427 mask bits from the symbol on that reloc. */
7428 if (t_symndx < symtab_hdr->sh_info)
7429 {
7430 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7431
7432 if (local_got_offsets != NULL)
7433 {
7434 struct plt_entry **local_plt = (struct plt_entry **)
7435 (local_got_offsets + symtab_hdr->sh_info);
7436 char *lgot_masks = (char *)
7437 (local_plt + symtab_hdr->sh_info);
7438 tls_mask = lgot_masks[t_symndx];
7439 }
7440 }
7441 else
7442 {
7443 struct elf_link_hash_entry *th
7444 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7445
7446 while (th->root.type == bfd_link_hash_indirect
7447 || th->root.type == bfd_link_hash_warning)
7448 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7449
7450 tls_mask
7451 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7452 }
7453
7454 /* The mask bits tell us if the call will be
7455 optimised away. */
7456 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7457 && (t_rtype == R_PPC_TLSGD
7458 || t_rtype == R_PPC_GOT_TLSGD16
7459 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7460 continue;
7461 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7462 && (t_rtype == R_PPC_TLSLD
7463 || t_rtype == R_PPC_GOT_TLSLD16
7464 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7465 continue;
7466 }
7467
7468 sym_type = h->type;
7469 }
7470
7471 if (r_type == R_PPC_ADDR16_HA)
7472 {
7473 if (h != NULL
7474 && !h->def_regular
7475 && h->protected_def
7476 && ppc_elf_hash_entry (h)->has_addr16_ha
7477 && ppc_elf_hash_entry (h)->has_addr16_lo)
7478 picfixup_size += 12;
7479 continue;
7480 }
7481
7482 /* The condition here under which we call find_plt_ent must
7483 match that in relocate_section. If we call find_plt_ent here
7484 but not in relocate_section, or vice versa, then the branch
7485 destination used here may be incorrect. */
7486 plist = NULL;
7487 if (h != NULL)
7488 {
7489 /* We know is_branch_reloc (r_type) is true. */
7490 if (h->type == STT_GNU_IFUNC
7491 || r_type == R_PPC_PLTREL24)
7492 plist = &h->plt.plist;
7493 }
7494 else if (sym_type == STT_GNU_IFUNC
7495 && elf_local_got_offsets (abfd) != NULL)
7496 {
7497 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7498 struct plt_entry **local_plt = (struct plt_entry **)
7499 (local_got_offsets + symtab_hdr->sh_info);
7500 plist = local_plt + ELF32_R_SYM (irel->r_info);
7501 }
7502 if (plist != NULL)
7503 {
7504 bfd_vma addend = 0;
7505 struct plt_entry *ent;
7506
7507 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7508 addend = irel->r_addend;
7509 ent = find_plt_ent (plist, got2, addend);
7510 if (ent != NULL)
7511 {
7512 if (htab->plt_type == PLT_NEW
7513 || h == NULL
7514 || !htab->elf.dynamic_sections_created
7515 || h->dynindx == -1)
7516 {
7517 tsec = htab->glink;
7518 toff = ent->glink_offset;
7519 }
7520 else
7521 {
7522 tsec = htab->elf.splt;
7523 toff = ent->plt.offset;
7524 }
7525 }
7526 }
7527
7528 /* If the branch and target are in the same section, you have
7529 no hope of adding stubs. We'll error out later should the
7530 branch overflow. */
7531 if (tsec == isec)
7532 continue;
7533
7534 /* There probably isn't any reason to handle symbols in
7535 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7536 attribute for a code section, and we are only looking at
7537 branches. However, implement it correctly here as a
7538 reference for other target relax_section functions. */
7539 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7540 {
7541 /* At this stage in linking, no SEC_MERGE symbol has been
7542 adjusted, so all references to such symbols need to be
7543 passed through _bfd_merged_section_offset. (Later, in
7544 relocate_section, all SEC_MERGE symbols *except* for
7545 section symbols have been adjusted.)
7546
7547 gas may reduce relocations against symbols in SEC_MERGE
7548 sections to a relocation against the section symbol when
7549 the original addend was zero. When the reloc is against
7550 a section symbol we should include the addend in the
7551 offset passed to _bfd_merged_section_offset, since the
7552 location of interest is the original symbol. On the
7553 other hand, an access to "sym+addend" where "sym" is not
7554 a section symbol should not include the addend; Such an
7555 access is presumed to be an offset from "sym"; The
7556 location of interest is just "sym". */
7557 if (sym_type == STT_SECTION)
7558 toff += irel->r_addend;
7559
7560 toff
7561 = _bfd_merged_section_offset (abfd, &tsec,
7562 elf_section_data (tsec)->sec_info,
7563 toff);
7564
7565 if (sym_type != STT_SECTION)
7566 toff += irel->r_addend;
7567 }
7568 /* PLTREL24 addends are special. */
7569 else if (r_type != R_PPC_PLTREL24)
7570 toff += irel->r_addend;
7571
7572 /* Attempted -shared link of non-pic code loses. */
7573 if ((!bfd_link_relocatable (link_info)
7574 && tsec == bfd_und_section_ptr)
7575 || tsec->output_section == NULL
7576 || (tsec->owner != NULL
7577 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7578 continue;
7579
7580 roff = irel->r_offset;
7581
7582 /* If the branch is in range, no need to do anything. */
7583 if (tsec != bfd_und_section_ptr
7584 && (!bfd_link_relocatable (link_info)
7585 /* A relocatable link may have sections moved during
7586 final link, so do not presume they remain in range. */
7587 || tsec->output_section == isec->output_section))
7588 {
7589 bfd_vma symaddr, reladdr;
7590
7591 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7592 reladdr = isec->output_section->vma + isec->output_offset + roff;
7593 if (symaddr - reladdr + max_branch_offset
7594 < 2 * max_branch_offset)
7595 continue;
7596 }
7597
7598 /* Look for an existing fixup to this address. */
7599 for (f = branch_fixups; f ; f = f->next)
7600 if (f->tsec == tsec && f->toff == toff)
7601 break;
7602
7603 if (f == NULL)
7604 {
7605 size_t size;
7606 unsigned long stub_rtype;
7607
7608 val = trampoff - roff;
7609 if (val >= max_branch_offset)
7610 /* Oh dear, we can't reach a trampoline. Don't try to add
7611 one. We'll report an error later. */
7612 continue;
7613
7614 if (bfd_link_pic (link_info))
7615 {
7616 size = 4 * ARRAY_SIZE (shared_stub_entry);
7617 insn_offset = 12;
7618 }
7619 else
7620 {
7621 size = 4 * ARRAY_SIZE (stub_entry);
7622 insn_offset = 0;
7623 }
7624 stub_rtype = R_PPC_RELAX;
7625 if (tsec == htab->elf.splt
7626 || tsec == htab->glink)
7627 {
7628 stub_rtype = R_PPC_RELAX_PLT;
7629 if (r_type == R_PPC_PLTREL24)
7630 stub_rtype = R_PPC_RELAX_PLTREL24;
7631 }
7632
7633 /* Hijack the old relocation. Since we need two
7634 relocations for this use a "composite" reloc. */
7635 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7636 stub_rtype);
7637 irel->r_offset = trampoff + insn_offset;
7638 if (r_type == R_PPC_PLTREL24
7639 && stub_rtype != R_PPC_RELAX_PLTREL24)
7640 irel->r_addend = 0;
7641
7642 /* Record the fixup so we don't do it again this section. */
7643 f = bfd_malloc (sizeof (*f));
7644 f->next = branch_fixups;
7645 f->tsec = tsec;
7646 f->toff = toff;
7647 f->trampoff = trampoff;
7648 branch_fixups = f;
7649
7650 trampoff += size;
7651 changes++;
7652 }
7653 else
7654 {
7655 val = f->trampoff - roff;
7656 if (val >= max_branch_offset)
7657 continue;
7658
7659 /* Nop out the reloc, since we're finalizing things here. */
7660 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7661 }
7662
7663 /* Get the section contents. */
7664 if (contents == NULL)
7665 {
7666 /* Get cached copy if it exists. */
7667 if (elf_section_data (isec)->this_hdr.contents != NULL)
7668 contents = elf_section_data (isec)->this_hdr.contents;
7669 /* Go get them off disk. */
7670 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7671 goto error_return;
7672 }
7673
7674 /* Fix up the existing branch to hit the trampoline. */
7675 hit_addr = contents + roff;
7676 switch (r_type)
7677 {
7678 case R_PPC_REL24:
7679 case R_PPC_LOCAL24PC:
7680 case R_PPC_PLTREL24:
7681 t0 = bfd_get_32 (abfd, hit_addr);
7682 t0 &= ~0x3fffffc;
7683 t0 |= val & 0x3fffffc;
7684 bfd_put_32 (abfd, t0, hit_addr);
7685 break;
7686
7687 case R_PPC_REL14:
7688 case R_PPC_REL14_BRTAKEN:
7689 case R_PPC_REL14_BRNTAKEN:
7690 t0 = bfd_get_32 (abfd, hit_addr);
7691 t0 &= ~0xfffc;
7692 t0 |= val & 0xfffc;
7693 bfd_put_32 (abfd, t0, hit_addr);
7694 break;
7695 }
7696 }
7697
7698 while (branch_fixups != NULL)
7699 {
7700 struct one_branch_fixup *f = branch_fixups;
7701 branch_fixups = branch_fixups->next;
7702 free (f);
7703 }
7704 }
7705
7706 workaround_change = FALSE;
7707 newsize = trampoff;
7708 if (htab->params->ppc476_workaround
7709 && (!bfd_link_relocatable (link_info)
7710 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7711 {
7712 bfd_vma addr, end_addr;
7713 unsigned int crossings;
7714 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7715
7716 addr = isec->output_section->vma + isec->output_offset;
7717 end_addr = addr + trampoff;
7718 addr &= -pagesize;
7719 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7720 if (crossings != 0)
7721 {
7722 /* Keep space aligned, to ensure the patch code itself does
7723 not cross a page. Don't decrease size calculated on a
7724 previous pass as otherwise we might never settle on a layout. */
7725 newsize = 15 - ((end_addr - 1) & 15);
7726 newsize += crossings * 16;
7727 if (relax_info->workaround_size < newsize)
7728 {
7729 relax_info->workaround_size = newsize;
7730 workaround_change = TRUE;
7731 }
7732 /* Ensure relocate_section is called. */
7733 isec->flags |= SEC_RELOC;
7734 }
7735 newsize = trampoff + relax_info->workaround_size;
7736 }
7737
7738 if (htab->params->pic_fixup > 0)
7739 {
7740 picfixup_size -= relax_info->picfixup_size;
7741 if (picfixup_size != 0)
7742 relax_info->picfixup_size += picfixup_size;
7743 newsize += relax_info->picfixup_size;
7744 }
7745
7746 if (changes != 0 || picfixup_size != 0 || workaround_change)
7747 isec->size = newsize;
7748
7749 if (isymbuf != NULL
7750 && symtab_hdr->contents != (unsigned char *) isymbuf)
7751 {
7752 if (! link_info->keep_memory)
7753 free (isymbuf);
7754 else
7755 {
7756 /* Cache the symbols for elf_link_input_bfd. */
7757 symtab_hdr->contents = (unsigned char *) isymbuf;
7758 }
7759 }
7760
7761 if (contents != NULL
7762 && elf_section_data (isec)->this_hdr.contents != contents)
7763 {
7764 if (!changes && !link_info->keep_memory)
7765 free (contents);
7766 else
7767 {
7768 /* Cache the section contents for elf_link_input_bfd. */
7769 elf_section_data (isec)->this_hdr.contents = contents;
7770 }
7771 }
7772
7773 changes += picfixup_size;
7774 if (changes != 0)
7775 {
7776 /* Append sufficient NOP relocs so we can write out relocation
7777 information for the trampolines. */
7778 Elf_Internal_Shdr *rel_hdr;
7779 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7780 * sizeof (*new_relocs));
7781 unsigned ix;
7782
7783 if (!new_relocs)
7784 goto error_return;
7785 memcpy (new_relocs, internal_relocs,
7786 isec->reloc_count * sizeof (*new_relocs));
7787 for (ix = changes; ix--;)
7788 {
7789 irel = new_relocs + ix + isec->reloc_count;
7790
7791 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7792 }
7793 if (internal_relocs != elf_section_data (isec)->relocs)
7794 free (internal_relocs);
7795 elf_section_data (isec)->relocs = new_relocs;
7796 isec->reloc_count += changes;
7797 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7798 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7799 }
7800 else if (internal_relocs != NULL
7801 && elf_section_data (isec)->relocs != internal_relocs)
7802 free (internal_relocs);
7803
7804 *again = changes != 0 || workaround_change;
7805 return TRUE;
7806
7807 error_return:
7808 while (branch_fixups != NULL)
7809 {
7810 struct one_branch_fixup *f = branch_fixups;
7811 branch_fixups = branch_fixups->next;
7812 free (f);
7813 }
7814 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7815 free (isymbuf);
7816 if (contents != NULL
7817 && elf_section_data (isec)->this_hdr.contents != contents)
7818 free (contents);
7819 if (internal_relocs != NULL
7820 && elf_section_data (isec)->relocs != internal_relocs)
7821 free (internal_relocs);
7822 return FALSE;
7823 }
7824 \f
7825 /* What to do when ld finds relocations against symbols defined in
7826 discarded sections. */
7827
7828 static unsigned int
7829 ppc_elf_action_discarded (asection *sec)
7830 {
7831 if (strcmp (".fixup", sec->name) == 0)
7832 return 0;
7833
7834 if (strcmp (".got2", sec->name) == 0)
7835 return 0;
7836
7837 return _bfd_elf_default_action_discarded (sec);
7838 }
7839 \f
7840 /* Fill in the address for a pointer generated in a linker section. */
7841
7842 static bfd_vma
7843 elf_finish_pointer_linker_section (bfd *input_bfd,
7844 elf_linker_section_t *lsect,
7845 struct elf_link_hash_entry *h,
7846 bfd_vma relocation,
7847 const Elf_Internal_Rela *rel)
7848 {
7849 elf_linker_section_pointers_t *linker_section_ptr;
7850
7851 BFD_ASSERT (lsect != NULL);
7852
7853 if (h != NULL)
7854 {
7855 /* Handle global symbol. */
7856 struct ppc_elf_link_hash_entry *eh;
7857
7858 eh = (struct ppc_elf_link_hash_entry *) h;
7859 BFD_ASSERT (eh->elf.def_regular);
7860 linker_section_ptr = eh->linker_section_pointer;
7861 }
7862 else
7863 {
7864 /* Handle local symbol. */
7865 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7866
7867 BFD_ASSERT (is_ppc_elf (input_bfd));
7868 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7869 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7870 }
7871
7872 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7873 rel->r_addend,
7874 lsect);
7875 BFD_ASSERT (linker_section_ptr != NULL);
7876
7877 /* Offset will always be a multiple of four, so use the bottom bit
7878 as a "written" flag. */
7879 if ((linker_section_ptr->offset & 1) == 0)
7880 {
7881 bfd_put_32 (lsect->section->owner,
7882 relocation + linker_section_ptr->addend,
7883 lsect->section->contents + linker_section_ptr->offset);
7884 linker_section_ptr->offset += 1;
7885 }
7886
7887 relocation = (lsect->section->output_section->vma
7888 + lsect->section->output_offset
7889 + linker_section_ptr->offset - 1
7890 - SYM_VAL (lsect->sym));
7891
7892 #ifdef DEBUG
7893 fprintf (stderr,
7894 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7895 lsect->name, (long) relocation, (long) relocation);
7896 #endif
7897
7898 return relocation;
7899 }
7900
7901 #define PPC_LO(v) ((v) & 0xffff)
7902 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7903 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7904
7905 static void
7906 write_glink_stub (struct elf_link_hash_entry *h, struct plt_entry *ent,
7907 asection *plt_sec, unsigned char *p,
7908 struct bfd_link_info *info)
7909 {
7910 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7911 bfd *output_bfd = info->output_bfd;
7912 bfd_vma plt;
7913 unsigned char *end = p + GLINK_ENTRY_SIZE (htab, h);
7914
7915 if (h != NULL
7916 && h == htab->tls_get_addr
7917 && !htab->params->no_tls_get_addr_opt)
7918 {
7919 bfd_put_32 (output_bfd, LWZ_11_3, p);
7920 p += 4;
7921 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
7922 p += 4;
7923 bfd_put_32 (output_bfd, MR_0_3, p);
7924 p += 4;
7925 bfd_put_32 (output_bfd, CMPWI_11_0, p);
7926 p += 4;
7927 bfd_put_32 (output_bfd, ADD_3_12_2, p);
7928 p += 4;
7929 bfd_put_32 (output_bfd, BEQLR, p);
7930 p += 4;
7931 bfd_put_32 (output_bfd, MR_3_0, p);
7932 p += 4;
7933 bfd_put_32 (output_bfd, NOP, p);
7934 p += 4;
7935 }
7936
7937 plt = ((ent->plt.offset & ~1)
7938 + plt_sec->output_section->vma
7939 + plt_sec->output_offset);
7940
7941 if (bfd_link_pic (info))
7942 {
7943 bfd_vma got = 0;
7944
7945 if (ent->addend >= 32768)
7946 got = (ent->addend
7947 + ent->sec->output_section->vma
7948 + ent->sec->output_offset);
7949 else if (htab->elf.hgot != NULL)
7950 got = SYM_VAL (htab->elf.hgot);
7951
7952 plt -= got;
7953
7954 if (plt + 0x8000 < 0x10000)
7955 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7956 else
7957 {
7958 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7959 p += 4;
7960 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7961 }
7962 }
7963 else
7964 {
7965 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7966 p += 4;
7967 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7968 }
7969 p += 4;
7970 bfd_put_32 (output_bfd, MTCTR_11, p);
7971 p += 4;
7972 bfd_put_32 (output_bfd, BCTR, p);
7973 p += 4;
7974 while (p < end)
7975 {
7976 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7977 p += 4;
7978 }
7979 }
7980
7981 /* Return true if symbol is defined statically. */
7982
7983 static bfd_boolean
7984 is_static_defined (struct elf_link_hash_entry *h)
7985 {
7986 return ((h->root.type == bfd_link_hash_defined
7987 || h->root.type == bfd_link_hash_defweak)
7988 && h->root.u.def.section != NULL
7989 && h->root.u.def.section->output_section != NULL);
7990 }
7991
7992 /* If INSN is an opcode that may be used with an @tls operand, return
7993 the transformed insn for TLS optimisation, otherwise return 0. If
7994 REG is non-zero only match an insn with RB or RA equal to REG. */
7995
7996 unsigned int
7997 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7998 {
7999 unsigned int rtra;
8000
8001 if ((insn & (0x3f << 26)) != 31 << 26)
8002 return 0;
8003
8004 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
8005 rtra = insn & ((1 << 26) - (1 << 16));
8006 else if (((insn >> 16) & 0x1f) == reg)
8007 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
8008 else
8009 return 0;
8010
8011 if ((insn & (0x3ff << 1)) == 266 << 1)
8012 /* add -> addi. */
8013 insn = 14 << 26;
8014 else if ((insn & (0x1f << 1)) == 23 << 1
8015 && ((insn & (0x1f << 6)) < 14 << 6
8016 || ((insn & (0x1f << 6)) >= 16 << 6
8017 && (insn & (0x1f << 6)) < 24 << 6)))
8018 /* load and store indexed -> dform. */
8019 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
8020 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
8021 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
8022 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
8023 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
8024 /* lwax -> lwa. */
8025 insn = (58 << 26) | 2;
8026 else
8027 return 0;
8028 insn |= rtra;
8029 return insn;
8030 }
8031
8032 /* If INSN is an opcode that may be used with an @tprel operand, return
8033 the transformed insn for an undefined weak symbol, ie. with the
8034 thread pointer REG operand removed. Otherwise return 0. */
8035
8036 unsigned int
8037 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
8038 {
8039 if ((insn & (0x1f << 16)) == reg << 16
8040 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8041 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
8042 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8043 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8044 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8045 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8046 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8047 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8048 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8049 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8050 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8051 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8052 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8053 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8054 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8055 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8056 && (insn & 3) != 1)
8057 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8058 && ((insn & 3) == 0 || (insn & 3) == 3))))
8059 {
8060 insn &= ~(0x1f << 16);
8061 }
8062 else if ((insn & (0x1f << 21)) == reg << 21
8063 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
8064 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
8065 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
8066 {
8067 insn &= ~(0x1f << 21);
8068 insn |= (insn & (0x1f << 16)) << 5;
8069 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
8070 insn -= 2 >> 26; /* convert to ori,oris */
8071 }
8072 else
8073 insn = 0;
8074 return insn;
8075 }
8076
8077 static bfd_boolean
8078 is_insn_ds_form (unsigned int insn)
8079 {
8080 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8081 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8082 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
8083 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
8084 }
8085
8086 static bfd_boolean
8087 is_insn_dq_form (unsigned int insn)
8088 {
8089 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
8090 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8091 && (insn & 3) == 1));
8092 }
8093
8094 /* The RELOCATE_SECTION function is called by the ELF backend linker
8095 to handle the relocations for a section.
8096
8097 The relocs are always passed as Rela structures; if the section
8098 actually uses Rel structures, the r_addend field will always be
8099 zero.
8100
8101 This function is responsible for adjust the section contents as
8102 necessary, and (if using Rela relocs and generating a
8103 relocatable output file) adjusting the reloc addend as
8104 necessary.
8105
8106 This function does not have to worry about setting the reloc
8107 address or the reloc symbol index.
8108
8109 LOCAL_SYMS is a pointer to the swapped in local symbols.
8110
8111 LOCAL_SECTIONS is an array giving the section in the input file
8112 corresponding to the st_shndx field of each local symbol.
8113
8114 The global hash table entry for the global symbols can be found
8115 via elf_sym_hashes (input_bfd).
8116
8117 When generating relocatable output, this function must handle
8118 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
8119 going to be the section symbol corresponding to the output
8120 section, which means that the addend must be adjusted
8121 accordingly. */
8122
8123 static bfd_boolean
8124 ppc_elf_relocate_section (bfd *output_bfd,
8125 struct bfd_link_info *info,
8126 bfd *input_bfd,
8127 asection *input_section,
8128 bfd_byte *contents,
8129 Elf_Internal_Rela *relocs,
8130 Elf_Internal_Sym *local_syms,
8131 asection **local_sections)
8132 {
8133 Elf_Internal_Shdr *symtab_hdr;
8134 struct elf_link_hash_entry **sym_hashes;
8135 struct ppc_elf_link_hash_table *htab;
8136 Elf_Internal_Rela *rel;
8137 Elf_Internal_Rela *wrel;
8138 Elf_Internal_Rela *relend;
8139 Elf_Internal_Rela outrel;
8140 asection *got2;
8141 bfd_vma *local_got_offsets;
8142 bfd_boolean ret = TRUE;
8143 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
8144 bfd_boolean is_vxworks_tls;
8145 unsigned int picfixup_size = 0;
8146 struct ppc_elf_relax_info *relax_info = NULL;
8147
8148 #ifdef DEBUG
8149 _bfd_error_handler ("ppc_elf_relocate_section called for %pB section %pA, "
8150 "%ld relocations%s",
8151 input_bfd, input_section,
8152 (long) input_section->reloc_count,
8153 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
8154 #endif
8155
8156 got2 = bfd_get_section_by_name (input_bfd, ".got2");
8157
8158 /* Initialize howto table if not already done. */
8159 if (!ppc_elf_howto_table[R_PPC_ADDR32])
8160 ppc_elf_howto_init ();
8161
8162 htab = ppc_elf_hash_table (info);
8163 local_got_offsets = elf_local_got_offsets (input_bfd);
8164 symtab_hdr = &elf_symtab_hdr (input_bfd);
8165 sym_hashes = elf_sym_hashes (input_bfd);
8166 /* We have to handle relocations in vxworks .tls_vars sections
8167 specially, because the dynamic loader is 'weird'. */
8168 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
8169 && !strcmp (input_section->output_section->name,
8170 ".tls_vars"));
8171 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
8172 relax_info = elf_section_data (input_section)->sec_info;
8173 rel = wrel = relocs;
8174 relend = relocs + input_section->reloc_count;
8175 for (; rel < relend; wrel++, rel++)
8176 {
8177 enum elf_ppc_reloc_type r_type;
8178 bfd_vma addend;
8179 bfd_reloc_status_type r;
8180 Elf_Internal_Sym *sym;
8181 asection *sec;
8182 struct elf_link_hash_entry *h;
8183 const char *sym_name;
8184 reloc_howto_type *howto;
8185 unsigned long r_symndx;
8186 bfd_vma relocation;
8187 bfd_vma branch_bit, from;
8188 bfd_boolean unresolved_reloc, save_unresolved_reloc;
8189 bfd_boolean warned;
8190 unsigned int tls_type, tls_mask, tls_gd;
8191 struct plt_entry **ifunc, **plt_list;
8192 struct reloc_howto_struct alt_howto;
8193
8194 again:
8195 r_type = ELF32_R_TYPE (rel->r_info);
8196 sym = NULL;
8197 sec = NULL;
8198 h = NULL;
8199 unresolved_reloc = FALSE;
8200 warned = FALSE;
8201 r_symndx = ELF32_R_SYM (rel->r_info);
8202
8203 if (r_symndx < symtab_hdr->sh_info)
8204 {
8205 sym = local_syms + r_symndx;
8206 sec = local_sections[r_symndx];
8207 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
8208
8209 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
8210 }
8211 else
8212 {
8213 bfd_boolean ignored;
8214
8215 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
8216 r_symndx, symtab_hdr, sym_hashes,
8217 h, sec, relocation,
8218 unresolved_reloc, warned, ignored);
8219
8220 sym_name = h->root.root.string;
8221 }
8222
8223 if (sec != NULL && discarded_section (sec))
8224 {
8225 /* For relocs against symbols from removed linkonce sections,
8226 or sections discarded by a linker script, we just want the
8227 section contents zeroed. Avoid any special processing. */
8228 howto = NULL;
8229 if (r_type < R_PPC_max)
8230 howto = ppc_elf_howto_table[r_type];
8231
8232 _bfd_clear_contents (howto, input_bfd, input_section,
8233 contents + rel->r_offset);
8234 wrel->r_offset = rel->r_offset;
8235 wrel->r_info = 0;
8236 wrel->r_addend = 0;
8237
8238 /* For ld -r, remove relocations in debug sections against
8239 symbols defined in discarded sections. Not done for
8240 non-debug to preserve relocs in .eh_frame which the
8241 eh_frame editing code expects to be present. */
8242 if (bfd_link_relocatable (info)
8243 && (input_section->flags & SEC_DEBUGGING))
8244 wrel--;
8245
8246 continue;
8247 }
8248
8249 if (bfd_link_relocatable (info))
8250 {
8251 if (got2 != NULL
8252 && r_type == R_PPC_PLTREL24
8253 && rel->r_addend != 0)
8254 {
8255 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8256 addend specifies the GOT pointer offset within .got2. */
8257 rel->r_addend += got2->output_offset;
8258 }
8259 if (r_type != R_PPC_RELAX_PLT
8260 && r_type != R_PPC_RELAX_PLTREL24
8261 && r_type != R_PPC_RELAX)
8262 goto copy_reloc;
8263 }
8264
8265 /* TLS optimizations. Replace instruction sequences and relocs
8266 based on information we collected in tls_optimize. We edit
8267 RELOCS so that --emit-relocs will output something sensible
8268 for the final instruction stream. */
8269 tls_mask = 0;
8270 tls_gd = 0;
8271 if (h != NULL)
8272 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
8273 else if (local_got_offsets != NULL)
8274 {
8275 struct plt_entry **local_plt;
8276 char *lgot_masks;
8277 local_plt
8278 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
8279 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
8280 tls_mask = lgot_masks[r_symndx];
8281 }
8282
8283 /* Ensure reloc mapping code below stays sane. */
8284 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
8285 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
8286 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
8287 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
8288 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
8289 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
8290 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
8291 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
8292 abort ();
8293 switch (r_type)
8294 {
8295 default:
8296 break;
8297
8298 case R_PPC_GOT_TPREL16:
8299 case R_PPC_GOT_TPREL16_LO:
8300 if ((tls_mask & TLS_TLS) != 0
8301 && (tls_mask & TLS_TPREL) == 0)
8302 {
8303 bfd_vma insn;
8304
8305 insn = bfd_get_32 (input_bfd,
8306 contents + rel->r_offset - d_offset);
8307 insn &= 31 << 21;
8308 insn |= 0x3c020000; /* addis 0,2,0 */
8309 bfd_put_32 (input_bfd, insn,
8310 contents + rel->r_offset - d_offset);
8311 r_type = R_PPC_TPREL16_HA;
8312 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8313 }
8314 break;
8315
8316 case R_PPC_TLS:
8317 if ((tls_mask & TLS_TLS) != 0
8318 && (tls_mask & TLS_TPREL) == 0)
8319 {
8320 bfd_vma insn;
8321
8322 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8323 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
8324 if (insn == 0)
8325 abort ();
8326 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8327 r_type = R_PPC_TPREL16_LO;
8328 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8329
8330 /* Was PPC_TLS which sits on insn boundary, now
8331 PPC_TPREL16_LO which is at low-order half-word. */
8332 rel->r_offset += d_offset;
8333 }
8334 break;
8335
8336 case R_PPC_GOT_TLSGD16_HI:
8337 case R_PPC_GOT_TLSGD16_HA:
8338 tls_gd = TLS_TPRELGD;
8339 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8340 goto tls_gdld_hi;
8341 break;
8342
8343 case R_PPC_GOT_TLSLD16_HI:
8344 case R_PPC_GOT_TLSLD16_HA:
8345 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8346 {
8347 tls_gdld_hi:
8348 if ((tls_mask & tls_gd) != 0)
8349 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8350 + R_PPC_GOT_TPREL16);
8351 else
8352 {
8353 rel->r_offset -= d_offset;
8354 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8355 r_type = R_PPC_NONE;
8356 }
8357 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8358 }
8359 break;
8360
8361 case R_PPC_GOT_TLSGD16:
8362 case R_PPC_GOT_TLSGD16_LO:
8363 tls_gd = TLS_TPRELGD;
8364 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8365 goto tls_ldgd_opt;
8366 break;
8367
8368 case R_PPC_GOT_TLSLD16:
8369 case R_PPC_GOT_TLSLD16_LO:
8370 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8371 {
8372 unsigned int insn1, insn2;
8373 bfd_vma offset;
8374
8375 tls_ldgd_opt:
8376 offset = (bfd_vma) -1;
8377 /* If not using the newer R_PPC_TLSGD/LD to mark
8378 __tls_get_addr calls, we must trust that the call
8379 stays with its arg setup insns, ie. that the next
8380 reloc is the __tls_get_addr call associated with
8381 the current reloc. Edit both insns. */
8382 if (input_section->has_tls_get_addr_call
8383 && rel + 1 < relend
8384 && branch_reloc_hash_match (input_bfd, rel + 1,
8385 htab->tls_get_addr))
8386 offset = rel[1].r_offset;
8387 /* We read the low GOT_TLS insn because we need to keep
8388 the destination reg. It may be something other than
8389 the usual r3, and moved to r3 before the call by
8390 intervening code. */
8391 insn1 = bfd_get_32 (input_bfd,
8392 contents + rel->r_offset - d_offset);
8393 if ((tls_mask & tls_gd) != 0)
8394 {
8395 /* IE */
8396 insn1 &= (0x1f << 21) | (0x1f << 16);
8397 insn1 |= 32 << 26; /* lwz */
8398 if (offset != (bfd_vma) -1)
8399 {
8400 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8401 insn2 = 0x7c631214; /* add 3,3,2 */
8402 bfd_put_32 (input_bfd, insn2, contents + offset);
8403 }
8404 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8405 + R_PPC_GOT_TPREL16);
8406 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8407 }
8408 else
8409 {
8410 /* LE */
8411 insn1 &= 0x1f << 21;
8412 insn1 |= 0x3c020000; /* addis r,2,0 */
8413 if (tls_gd == 0)
8414 {
8415 /* Was an LD reloc. */
8416 for (r_symndx = 0;
8417 r_symndx < symtab_hdr->sh_info;
8418 r_symndx++)
8419 if (local_sections[r_symndx] == sec)
8420 break;
8421 if (r_symndx >= symtab_hdr->sh_info)
8422 r_symndx = STN_UNDEF;
8423 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8424 if (r_symndx != STN_UNDEF)
8425 rel->r_addend -= (local_syms[r_symndx].st_value
8426 + sec->output_offset
8427 + sec->output_section->vma);
8428 }
8429 r_type = R_PPC_TPREL16_HA;
8430 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8431 if (offset != (bfd_vma) -1)
8432 {
8433 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8434 rel[1].r_offset = offset + d_offset;
8435 rel[1].r_addend = rel->r_addend;
8436 insn2 = 0x38630000; /* addi 3,3,0 */
8437 bfd_put_32 (input_bfd, insn2, contents + offset);
8438 }
8439 }
8440 bfd_put_32 (input_bfd, insn1,
8441 contents + rel->r_offset - d_offset);
8442 if (tls_gd == 0)
8443 {
8444 /* We changed the symbol on an LD reloc. Start over
8445 in order to get h, sym, sec etc. right. */
8446 goto again;
8447 }
8448 }
8449 break;
8450
8451 case R_PPC_TLSGD:
8452 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
8453 && rel + 1 < relend)
8454 {
8455 unsigned int insn2;
8456 bfd_vma offset = rel->r_offset;
8457
8458 if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
8459 {
8460 bfd_put_32 (input_bfd, NOP, contents + offset);
8461 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8462 break;
8463 }
8464
8465 if ((tls_mask & TLS_TPRELGD) != 0)
8466 {
8467 /* IE */
8468 r_type = R_PPC_NONE;
8469 insn2 = 0x7c631214; /* add 3,3,2 */
8470 }
8471 else
8472 {
8473 /* LE */
8474 r_type = R_PPC_TPREL16_LO;
8475 rel->r_offset += d_offset;
8476 insn2 = 0x38630000; /* addi 3,3,0 */
8477 }
8478 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8479 bfd_put_32 (input_bfd, insn2, contents + offset);
8480 /* Zap the reloc on the _tls_get_addr call too. */
8481 BFD_ASSERT (offset == rel[1].r_offset);
8482 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8483 }
8484 break;
8485
8486 case R_PPC_TLSLD:
8487 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
8488 && rel + 1 < relend)
8489 {
8490 unsigned int insn2;
8491
8492 if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
8493 {
8494 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8495 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8496 break;
8497 }
8498
8499 for (r_symndx = 0;
8500 r_symndx < symtab_hdr->sh_info;
8501 r_symndx++)
8502 if (local_sections[r_symndx] == sec)
8503 break;
8504 if (r_symndx >= symtab_hdr->sh_info)
8505 r_symndx = STN_UNDEF;
8506 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8507 if (r_symndx != STN_UNDEF)
8508 rel->r_addend -= (local_syms[r_symndx].st_value
8509 + sec->output_offset
8510 + sec->output_section->vma);
8511
8512 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8513 rel->r_offset += d_offset;
8514 insn2 = 0x38630000; /* addi 3,3,0 */
8515 bfd_put_32 (input_bfd, insn2,
8516 contents + rel->r_offset - d_offset);
8517 /* Zap the reloc on the _tls_get_addr call too. */
8518 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8519 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8520 goto again;
8521 }
8522 break;
8523 }
8524
8525 /* Handle other relocations that tweak non-addend part of insn. */
8526 branch_bit = 0;
8527 switch (r_type)
8528 {
8529 default:
8530 break;
8531
8532 /* Branch taken prediction relocations. */
8533 case R_PPC_ADDR14_BRTAKEN:
8534 case R_PPC_REL14_BRTAKEN:
8535 branch_bit = BRANCH_PREDICT_BIT;
8536 /* Fall through. */
8537
8538 /* Branch not taken prediction relocations. */
8539 case R_PPC_ADDR14_BRNTAKEN:
8540 case R_PPC_REL14_BRNTAKEN:
8541 {
8542 unsigned int insn;
8543
8544 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8545 insn &= ~BRANCH_PREDICT_BIT;
8546 insn |= branch_bit;
8547
8548 from = (rel->r_offset
8549 + input_section->output_offset
8550 + input_section->output_section->vma);
8551
8552 /* Invert 'y' bit if not the default. */
8553 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8554 insn ^= BRANCH_PREDICT_BIT;
8555
8556 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8557 }
8558 break;
8559
8560 case R_PPC_PLT16_HA:
8561 {
8562 unsigned int insn;
8563
8564 insn = bfd_get_32 (input_bfd,
8565 contents + rel->r_offset - d_offset);
8566 if ((insn & (0x3f << 26)) == 15u << 26
8567 && (insn & (0x1f << 16)) != 0)
8568 {
8569 if (!bfd_link_pic (info))
8570 {
8571 /* Convert addis to lis. */
8572 insn &= ~(0x1f << 16);
8573 bfd_put_32 (input_bfd, insn,
8574 contents + rel->r_offset - d_offset);
8575 }
8576 }
8577 else if (bfd_link_pic (info))
8578 info->callbacks->einfo
8579 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8580 input_bfd, input_section, rel->r_offset,
8581 "R_PPC_PLT16_HA", insn);
8582 }
8583 break;
8584 }
8585
8586 if (ELIMINATE_COPY_RELOCS
8587 && h != NULL
8588 && !h->def_regular
8589 && h->protected_def
8590 && ppc_elf_hash_entry (h)->has_addr16_ha
8591 && ppc_elf_hash_entry (h)->has_addr16_lo
8592 && htab->params->pic_fixup > 0)
8593 {
8594 /* Convert lis;addi or lis;load/store accessing a protected
8595 variable defined in a shared library to PIC. */
8596 unsigned int insn;
8597
8598 if (r_type == R_PPC_ADDR16_HA)
8599 {
8600 insn = bfd_get_32 (input_bfd,
8601 contents + rel->r_offset - d_offset);
8602 if ((insn & (0x3f << 26)) == (15u << 26)
8603 && (insn & (0x1f << 16)) == 0 /* lis */)
8604 {
8605 bfd_byte *p;
8606 bfd_vma off;
8607 bfd_vma got_addr;
8608
8609 p = (contents + input_section->size
8610 - relax_info->workaround_size
8611 - relax_info->picfixup_size
8612 + picfixup_size);
8613 off = (p - contents) - (rel->r_offset - d_offset);
8614 if (off > 0x1fffffc || (off & 3) != 0)
8615 info->callbacks->einfo
8616 (_("%H: fixup branch overflow\n"),
8617 input_bfd, input_section, rel->r_offset);
8618
8619 bfd_put_32 (input_bfd, B | off,
8620 contents + rel->r_offset - d_offset);
8621 got_addr = (htab->elf.sgot->output_section->vma
8622 + htab->elf.sgot->output_offset
8623 + (h->got.offset & ~1));
8624 wrel->r_offset = (p - contents) + d_offset;
8625 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8626 wrel->r_addend = got_addr;
8627 insn &= ~0xffff;
8628 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8629 bfd_put_32 (input_bfd, insn, p);
8630
8631 /* Convert lis to lwz, loading address from GOT. */
8632 insn &= ~0xffff;
8633 insn ^= (32u ^ 15u) << 26;
8634 insn |= (insn & (0x1f << 21)) >> 5;
8635 insn |= got_addr & 0xffff;
8636 bfd_put_32 (input_bfd, insn, p + 4);
8637
8638 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8639 picfixup_size += 12;
8640
8641 /* Use one of the spare relocs, so --emit-relocs
8642 output is reasonable. */
8643 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8644 wrel++, rel++;
8645 rel->r_offset = wrel[-1].r_offset + 4;
8646 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8647 rel->r_addend = wrel[-1].r_addend;
8648
8649 /* Continue on as if we had a got reloc, to output
8650 dynamic reloc. */
8651 r_type = R_PPC_GOT16_LO;
8652 }
8653 else
8654 _bfd_error_handler
8655 /* xgettext:c-format */
8656 (_("%pB(%pA+%#" PRIx64 "): error: "
8657 "%s with unexpected instruction %#x"),
8658 input_bfd, input_section, (uint64_t) rel->r_offset,
8659 "R_PPC_ADDR16_HA", insn);
8660 }
8661 else if (r_type == R_PPC_ADDR16_LO)
8662 {
8663 insn = bfd_get_32 (input_bfd,
8664 contents + rel->r_offset - d_offset);
8665 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8666 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8667 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8668 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8669 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8670 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8671 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8672 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8673 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8674 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8675 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8676 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8677 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8678 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8679 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8680 && (insn & 3) != 1)
8681 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8682 && ((insn & 3) == 0 || (insn & 3) == 3)))
8683 {
8684 /* Arrange to apply the reloc addend, if any. */
8685 relocation = 0;
8686 unresolved_reloc = FALSE;
8687 rel->r_info = ELF32_R_INFO (0, r_type);
8688 }
8689 else
8690 _bfd_error_handler
8691 /* xgettext:c-format */
8692 (_("%pB(%pA+%#" PRIx64 "): error: "
8693 "%s with unexpected instruction %#x"),
8694 input_bfd, input_section, (uint64_t) rel->r_offset,
8695 "R_PPC_ADDR16_LO", insn);
8696 }
8697 }
8698
8699 ifunc = NULL;
8700 if (!htab->is_vxworks)
8701 {
8702 struct plt_entry *ent;
8703
8704 if (h != NULL)
8705 {
8706 if (h->type == STT_GNU_IFUNC)
8707 ifunc = &h->plt.plist;
8708 }
8709 else if (local_got_offsets != NULL
8710 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8711 {
8712 struct plt_entry **local_plt;
8713
8714 local_plt = (struct plt_entry **) (local_got_offsets
8715 + symtab_hdr->sh_info);
8716 ifunc = local_plt + r_symndx;
8717 }
8718
8719 ent = NULL;
8720 if (ifunc != NULL
8721 && (!bfd_link_pic (info)
8722 || is_branch_reloc (r_type)
8723 || r_type == R_PPC_PLT16_LO
8724 || r_type == R_PPC_PLT16_HI
8725 || r_type == R_PPC_PLT16_HA))
8726 {
8727 addend = 0;
8728 if (bfd_link_pic (info)
8729 && (r_type == R_PPC_PLTREL24
8730 || r_type == R_PPC_PLT16_LO
8731 || r_type == R_PPC_PLT16_HI
8732 || r_type == R_PPC_PLT16_HA))
8733 addend = rel->r_addend;
8734 ent = find_plt_ent (ifunc, got2, addend);
8735 }
8736 if (ent != NULL)
8737 {
8738 if (bfd_link_pic (info)
8739 && ent->sec != got2
8740 && htab->plt_type != PLT_NEW
8741 && (!htab->elf.dynamic_sections_created
8742 || h == NULL
8743 || h->dynindx == -1))
8744 {
8745 /* Uh oh, we are going to create a pic glink stub
8746 for an ifunc (here for h == NULL and later in
8747 finish_dynamic_symbol for h != NULL), and
8748 apparently are using code compiled with
8749 -mbss-plt. The difficulty is that -mbss-plt code
8750 gives no indication via a magic PLTREL24 addend
8751 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8752 is pointing into a .got2 section (and how far
8753 into .got2). */
8754 info->callbacks->einfo
8755 /* xgettext:c-format */
8756 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8757 input_bfd, input_section, rel->r_offset, sym_name);
8758 }
8759
8760 unresolved_reloc = FALSE;
8761 if (htab->plt_type == PLT_NEW
8762 || !htab->elf.dynamic_sections_created
8763 || h == NULL
8764 || h->dynindx == -1)
8765 relocation = (htab->glink->output_section->vma
8766 + htab->glink->output_offset
8767 + (ent->glink_offset & ~1));
8768 else
8769 relocation = (htab->elf.splt->output_section->vma
8770 + htab->elf.splt->output_offset
8771 + ent->plt.offset);
8772 }
8773 }
8774
8775 addend = rel->r_addend;
8776 save_unresolved_reloc = unresolved_reloc;
8777 howto = NULL;
8778 if (r_type < R_PPC_max)
8779 howto = ppc_elf_howto_table[r_type];
8780
8781 switch (r_type)
8782 {
8783 default:
8784 break;
8785
8786 case R_PPC_TPREL16_HA:
8787 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8788 {
8789 bfd_byte *p = contents + (rel->r_offset & ~3);
8790 unsigned int insn = bfd_get_32 (input_bfd, p);
8791 if ((insn & ((0x3f << 26) | 0x1f << 16))
8792 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8793 /* xgettext:c-format */
8794 info->callbacks->minfo
8795 (_("%H: warning: %s unexpected insn %#x.\n"),
8796 input_bfd, input_section, rel->r_offset, howto->name, insn);
8797 else
8798 bfd_put_32 (input_bfd, NOP, p);
8799 }
8800 break;
8801
8802 case R_PPC_TPREL16_LO:
8803 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8804 {
8805 bfd_byte *p = contents + (rel->r_offset & ~3);
8806 unsigned int insn = bfd_get_32 (input_bfd, p);
8807 insn &= ~(0x1f << 16);
8808 insn |= 2 << 16;
8809 bfd_put_32 (input_bfd, insn, p);
8810 }
8811 break;
8812 }
8813
8814 tls_type = 0;
8815 switch (r_type)
8816 {
8817 default:
8818 /* xgettext:c-format */
8819 _bfd_error_handler (_("%pB: %s unsupported"),
8820 input_bfd, howto->name);
8821
8822 bfd_set_error (bfd_error_bad_value);
8823 ret = FALSE;
8824 goto copy_reloc;
8825
8826 case R_PPC_NONE:
8827 case R_PPC_TLS:
8828 case R_PPC_TLSGD:
8829 case R_PPC_TLSLD:
8830 case R_PPC_EMB_MRKREF:
8831 case R_PPC_GNU_VTINHERIT:
8832 case R_PPC_GNU_VTENTRY:
8833 goto copy_reloc;
8834
8835 /* GOT16 relocations. Like an ADDR16 using the symbol's
8836 address in the GOT as relocation value instead of the
8837 symbol's value itself. Also, create a GOT entry for the
8838 symbol and put the symbol value there. */
8839 case R_PPC_GOT_TLSGD16:
8840 case R_PPC_GOT_TLSGD16_LO:
8841 case R_PPC_GOT_TLSGD16_HI:
8842 case R_PPC_GOT_TLSGD16_HA:
8843 tls_type = TLS_TLS | TLS_GD;
8844 goto dogot;
8845
8846 case R_PPC_GOT_TLSLD16:
8847 case R_PPC_GOT_TLSLD16_LO:
8848 case R_PPC_GOT_TLSLD16_HI:
8849 case R_PPC_GOT_TLSLD16_HA:
8850 tls_type = TLS_TLS | TLS_LD;
8851 goto dogot;
8852
8853 case R_PPC_GOT_TPREL16:
8854 case R_PPC_GOT_TPREL16_LO:
8855 case R_PPC_GOT_TPREL16_HI:
8856 case R_PPC_GOT_TPREL16_HA:
8857 tls_type = TLS_TLS | TLS_TPREL;
8858 goto dogot;
8859
8860 case R_PPC_GOT_DTPREL16:
8861 case R_PPC_GOT_DTPREL16_LO:
8862 case R_PPC_GOT_DTPREL16_HI:
8863 case R_PPC_GOT_DTPREL16_HA:
8864 tls_type = TLS_TLS | TLS_DTPREL;
8865 goto dogot;
8866
8867 case R_PPC_GOT16:
8868 case R_PPC_GOT16_LO:
8869 case R_PPC_GOT16_HI:
8870 case R_PPC_GOT16_HA:
8871 tls_mask = 0;
8872 dogot:
8873 {
8874 /* Relocation is to the entry for this symbol in the global
8875 offset table. */
8876 bfd_vma off;
8877 bfd_vma *offp;
8878 unsigned long indx;
8879
8880 if (htab->elf.sgot == NULL)
8881 abort ();
8882
8883 indx = 0;
8884 if (tls_type == (TLS_TLS | TLS_LD)
8885 && (h == NULL
8886 || !h->def_dynamic))
8887 offp = &htab->tlsld_got.offset;
8888 else if (h != NULL)
8889 {
8890 if (!htab->elf.dynamic_sections_created
8891 || h->dynindx == -1
8892 || SYMBOL_REFERENCES_LOCAL (info, h)
8893 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8894 /* This is actually a static link, or it is a
8895 -Bsymbolic link and the symbol is defined
8896 locally, or the symbol was forced to be local
8897 because of a version file. */
8898 ;
8899 else
8900 {
8901 indx = h->dynindx;
8902 unresolved_reloc = FALSE;
8903 }
8904 offp = &h->got.offset;
8905 }
8906 else
8907 {
8908 if (local_got_offsets == NULL)
8909 abort ();
8910 offp = &local_got_offsets[r_symndx];
8911 }
8912
8913 /* The offset must always be a multiple of 4. We use the
8914 least significant bit to record whether we have already
8915 processed this entry. */
8916 off = *offp;
8917 if ((off & 1) != 0)
8918 off &= ~1;
8919 else
8920 {
8921 unsigned int tls_m = ((tls_mask & TLS_TLS) != 0
8922 ? tls_mask & (TLS_LD | TLS_GD | TLS_DTPREL
8923 | TLS_TPREL | TLS_TPRELGD)
8924 : 0);
8925
8926 if (offp == &htab->tlsld_got.offset)
8927 tls_m = TLS_LD;
8928 else if (h == NULL
8929 || !h->def_dynamic)
8930 tls_m &= ~TLS_LD;
8931
8932 /* We might have multiple got entries for this sym.
8933 Initialize them all. */
8934 do
8935 {
8936 int tls_ty = 0;
8937
8938 if ((tls_m & TLS_LD) != 0)
8939 {
8940 tls_ty = TLS_TLS | TLS_LD;
8941 tls_m &= ~TLS_LD;
8942 }
8943 else if ((tls_m & TLS_GD) != 0)
8944 {
8945 tls_ty = TLS_TLS | TLS_GD;
8946 tls_m &= ~TLS_GD;
8947 }
8948 else if ((tls_m & TLS_DTPREL) != 0)
8949 {
8950 tls_ty = TLS_TLS | TLS_DTPREL;
8951 tls_m &= ~TLS_DTPREL;
8952 }
8953 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8954 {
8955 tls_ty = TLS_TLS | TLS_TPREL;
8956 tls_m = 0;
8957 }
8958
8959 /* Generate relocs for the dynamic linker. */
8960 if (indx != 0
8961 || (bfd_link_pic (info)
8962 && (h == NULL
8963 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8964 || offp == &htab->tlsld_got.offset)
8965 && !(tls_ty == (TLS_TLS | TLS_TPREL)
8966 && bfd_link_executable (info)
8967 && SYMBOL_REFERENCES_LOCAL (info, h))))
8968 {
8969 asection *rsec = htab->elf.srelgot;
8970 bfd_byte * loc;
8971
8972 if (ifunc != NULL)
8973 {
8974 rsec = htab->elf.irelplt;
8975 if (indx == 0)
8976 htab->local_ifunc_resolver = 1;
8977 else if (is_static_defined (h))
8978 htab->maybe_local_ifunc_resolver = 1;
8979 }
8980 outrel.r_offset = (htab->elf.sgot->output_section->vma
8981 + htab->elf.sgot->output_offset
8982 + off);
8983 outrel.r_addend = 0;
8984 if (tls_ty & (TLS_LD | TLS_GD))
8985 {
8986 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8987 if (tls_ty == (TLS_TLS | TLS_GD))
8988 {
8989 loc = rsec->contents;
8990 loc += (rsec->reloc_count++
8991 * sizeof (Elf32_External_Rela));
8992 bfd_elf32_swap_reloca_out (output_bfd,
8993 &outrel, loc);
8994 outrel.r_offset += 4;
8995 outrel.r_info
8996 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8997 }
8998 }
8999 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
9000 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
9001 else if (tls_ty == (TLS_TLS | TLS_TPREL))
9002 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
9003 else if (indx != 0)
9004 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
9005 else if (ifunc != NULL)
9006 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9007 else
9008 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9009 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
9010 {
9011 outrel.r_addend += relocation;
9012 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
9013 {
9014 if (htab->elf.tls_sec == NULL)
9015 outrel.r_addend = 0;
9016 else
9017 outrel.r_addend -= htab->elf.tls_sec->vma;
9018 }
9019 }
9020 loc = rsec->contents;
9021 loc += (rsec->reloc_count++
9022 * sizeof (Elf32_External_Rela));
9023 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9024 }
9025
9026 /* Init the .got section contents if we're not
9027 emitting a reloc. */
9028 else
9029 {
9030 bfd_vma value = relocation;
9031
9032 if (tls_ty != 0)
9033 {
9034 if (htab->elf.tls_sec == NULL)
9035 value = 0;
9036 else
9037 {
9038 if (tls_ty & TLS_LD)
9039 value = 0;
9040 else
9041 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
9042 if (tls_ty & TLS_TPREL)
9043 value += DTP_OFFSET - TP_OFFSET;
9044 }
9045
9046 if (tls_ty & (TLS_LD | TLS_GD))
9047 {
9048 bfd_put_32 (input_bfd, value,
9049 htab->elf.sgot->contents + off + 4);
9050 value = 1;
9051 }
9052 }
9053 bfd_put_32 (input_bfd, value,
9054 htab->elf.sgot->contents + off);
9055 }
9056
9057 off += 4;
9058 if (tls_ty & (TLS_LD | TLS_GD))
9059 off += 4;
9060 }
9061 while (tls_m != 0);
9062
9063 off = *offp;
9064 *offp = off | 1;
9065 }
9066
9067 if (off >= (bfd_vma) -2)
9068 abort ();
9069
9070 if ((tls_type & TLS_TLS) != 0)
9071 {
9072 if (tls_type != (TLS_TLS | TLS_LD))
9073 {
9074 if ((tls_mask & TLS_LD) != 0
9075 && !(h == NULL
9076 || !h->def_dynamic))
9077 off += 8;
9078 if (tls_type != (TLS_TLS | TLS_GD))
9079 {
9080 if ((tls_mask & TLS_GD) != 0)
9081 off += 8;
9082 if (tls_type != (TLS_TLS | TLS_DTPREL))
9083 {
9084 if ((tls_mask & TLS_DTPREL) != 0)
9085 off += 4;
9086 }
9087 }
9088 }
9089 }
9090
9091 /* If here for a picfixup, we're done. */
9092 if (r_type != ELF32_R_TYPE (rel->r_info))
9093 goto copy_reloc;
9094
9095 relocation = (htab->elf.sgot->output_section->vma
9096 + htab->elf.sgot->output_offset
9097 + off
9098 - SYM_VAL (htab->elf.hgot));
9099
9100 /* Addends on got relocations don't make much sense.
9101 x+off@got is actually x@got+off, and since the got is
9102 generated by a hash table traversal, the value in the
9103 got at entry m+n bears little relation to the entry m. */
9104 if (addend != 0)
9105 info->callbacks->einfo
9106 /* xgettext:c-format */
9107 (_("%H: non-zero addend on %s reloc against `%s'\n"),
9108 input_bfd, input_section, rel->r_offset,
9109 howto->name,
9110 sym_name);
9111 }
9112 break;
9113
9114 /* Relocations that need no special processing. */
9115 case R_PPC_LOCAL24PC:
9116 /* It makes no sense to point a local relocation
9117 at a symbol not in this object. */
9118 if (unresolved_reloc)
9119 {
9120 (*info->callbacks->undefined_symbol) (info,
9121 h->root.root.string,
9122 input_bfd,
9123 input_section,
9124 rel->r_offset,
9125 TRUE);
9126 goto copy_reloc;
9127 }
9128 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
9129 {
9130 /* @local on an ifunc does not really make sense since
9131 the ifunc resolver can take you anywhere. More
9132 seriously, calls to ifuncs must go through a plt call
9133 stub, and for pic the plt call stubs uses r30 to
9134 access the PLT. The problem is that a call that is
9135 local won't have the +32k reloc addend trick marking
9136 -fPIC code, so the linker won't know whether r30 is
9137 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
9138 /* xgettext:c-format */
9139 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
9140 input_bfd, input_section, rel->r_offset,
9141 h->root.root.string);
9142 }
9143 break;
9144
9145 case R_PPC_DTPREL16:
9146 case R_PPC_DTPREL16_LO:
9147 case R_PPC_DTPREL16_HI:
9148 case R_PPC_DTPREL16_HA:
9149 if (htab->elf.tls_sec != NULL)
9150 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9151 break;
9152
9153 /* Relocations that may need to be propagated if this is a shared
9154 object. */
9155 case R_PPC_TPREL16:
9156 case R_PPC_TPREL16_LO:
9157 case R_PPC_TPREL16_HI:
9158 case R_PPC_TPREL16_HA:
9159 if (h != NULL
9160 && h->root.type == bfd_link_hash_undefweak
9161 && h->dynindx == -1)
9162 {
9163 /* Make this relocation against an undefined weak symbol
9164 resolve to zero. This is really just a tweak, since
9165 code using weak externs ought to check that they are
9166 defined before using them. */
9167 bfd_byte *p = contents + rel->r_offset - d_offset;
9168 unsigned int insn = bfd_get_32 (input_bfd, p);
9169 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
9170 if (insn != 0)
9171 bfd_put_32 (input_bfd, insn, p);
9172 break;
9173 }
9174 if (htab->elf.tls_sec != NULL)
9175 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9176 /* The TPREL16 relocs shouldn't really be used in shared
9177 libs or with non-local symbols as that will result in
9178 DT_TEXTREL being set, but support them anyway. */
9179 goto dodyn;
9180
9181 case R_PPC_TPREL32:
9182 if (htab->elf.tls_sec != NULL)
9183 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9184 goto dodyn;
9185
9186 case R_PPC_DTPREL32:
9187 if (htab->elf.tls_sec != NULL)
9188 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9189 goto dodyn;
9190
9191 case R_PPC_DTPMOD32:
9192 relocation = 1;
9193 addend = 0;
9194 goto dodyn;
9195
9196 case R_PPC_REL16:
9197 case R_PPC_REL16_LO:
9198 case R_PPC_REL16_HI:
9199 case R_PPC_REL16_HA:
9200 case R_PPC_REL16DX_HA:
9201 break;
9202
9203 case R_PPC_REL32:
9204 if (h == NULL || h == htab->elf.hgot)
9205 break;
9206 /* fall through */
9207
9208 case R_PPC_ADDR32:
9209 case R_PPC_ADDR16:
9210 case R_PPC_ADDR16_LO:
9211 case R_PPC_ADDR16_HI:
9212 case R_PPC_ADDR16_HA:
9213 case R_PPC_UADDR32:
9214 case R_PPC_UADDR16:
9215 goto dodyn;
9216
9217 case R_PPC_VLE_REL8:
9218 case R_PPC_VLE_REL15:
9219 case R_PPC_VLE_REL24:
9220 case R_PPC_REL24:
9221 case R_PPC_REL14:
9222 case R_PPC_REL14_BRTAKEN:
9223 case R_PPC_REL14_BRNTAKEN:
9224 /* If these relocations are not to a named symbol, they can be
9225 handled right here, no need to bother the dynamic linker. */
9226 if (SYMBOL_CALLS_LOCAL (info, h)
9227 || h == htab->elf.hgot)
9228 break;
9229 /* fall through */
9230
9231 case R_PPC_ADDR24:
9232 case R_PPC_ADDR14:
9233 case R_PPC_ADDR14_BRTAKEN:
9234 case R_PPC_ADDR14_BRNTAKEN:
9235 if (h != NULL && !bfd_link_pic (info))
9236 break;
9237 /* fall through */
9238
9239 dodyn:
9240 if ((input_section->flags & SEC_ALLOC) == 0
9241 || is_vxworks_tls)
9242 break;
9243
9244 if (bfd_link_pic (info)
9245 ? ((h == NULL
9246 || ppc_elf_hash_entry (h)->dyn_relocs != NULL)
9247 && ((h != NULL && pc_dynrelocs (h))
9248 || must_be_dyn_reloc (info, r_type)))
9249 : (h != NULL
9250 && ppc_elf_hash_entry (h)->dyn_relocs != NULL))
9251 {
9252 int skip;
9253 bfd_byte *loc;
9254 asection *sreloc;
9255 long indx = 0;
9256
9257 #ifdef DEBUG
9258 fprintf (stderr, "ppc_elf_relocate_section needs to "
9259 "create relocation for %s\n",
9260 (h && h->root.root.string
9261 ? h->root.root.string : "<unknown>"));
9262 #endif
9263
9264 /* When generating a shared object, these relocations
9265 are copied into the output file to be resolved at run
9266 time. */
9267 skip = 0;
9268 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
9269 input_section,
9270 rel->r_offset);
9271 if (outrel.r_offset == (bfd_vma) -1
9272 || outrel.r_offset == (bfd_vma) -2)
9273 skip = (int) outrel.r_offset;
9274 outrel.r_offset += (input_section->output_section->vma
9275 + input_section->output_offset);
9276
9277 if (skip)
9278 memset (&outrel, 0, sizeof outrel);
9279 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
9280 {
9281 indx = h->dynindx;
9282 BFD_ASSERT (indx != -1);
9283 unresolved_reloc = FALSE;
9284 outrel.r_info = ELF32_R_INFO (indx, r_type);
9285 outrel.r_addend = rel->r_addend;
9286 }
9287 else
9288 {
9289 outrel.r_addend = relocation + rel->r_addend;
9290
9291 if (r_type != R_PPC_ADDR32)
9292 {
9293 if (ifunc != NULL)
9294 {
9295 /* If we get here when building a static
9296 executable, then the libc startup function
9297 responsible for applying indirect function
9298 relocations is going to complain about
9299 the reloc type.
9300 If we get here when building a dynamic
9301 executable, it will be because we have
9302 a text relocation. The dynamic loader
9303 will set the text segment writable and
9304 non-executable to apply text relocations.
9305 So we'll segfault when trying to run the
9306 indirection function to resolve the reloc. */
9307 info->callbacks->einfo
9308 /* xgettext:c-format */
9309 (_("%H: relocation %s for indirect "
9310 "function %s unsupported\n"),
9311 input_bfd, input_section, rel->r_offset,
9312 howto->name,
9313 sym_name);
9314 ret = FALSE;
9315 }
9316 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
9317 ;
9318 else if (sec == NULL || sec->owner == NULL)
9319 {
9320 bfd_set_error (bfd_error_bad_value);
9321 ret = FALSE;
9322 }
9323 else
9324 {
9325 asection *osec;
9326
9327 /* We are turning this relocation into one
9328 against a section symbol. It would be
9329 proper to subtract the symbol's value,
9330 osec->vma, from the emitted reloc addend,
9331 but ld.so expects buggy relocs.
9332 FIXME: Why not always use a zero index? */
9333 osec = sec->output_section;
9334 indx = elf_section_data (osec)->dynindx;
9335 if (indx == 0)
9336 {
9337 osec = htab->elf.text_index_section;
9338 indx = elf_section_data (osec)->dynindx;
9339 }
9340 BFD_ASSERT (indx != 0);
9341 #ifdef DEBUG
9342 if (indx == 0)
9343 printf ("indx=%ld section=%s flags=%08x name=%s\n",
9344 indx, osec->name, osec->flags,
9345 h->root.root.string);
9346 #endif
9347 }
9348
9349 outrel.r_info = ELF32_R_INFO (indx, r_type);
9350 }
9351 else if (ifunc != NULL)
9352 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9353 else
9354 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9355 }
9356
9357 sreloc = elf_section_data (input_section)->sreloc;
9358 if (ifunc)
9359 {
9360 sreloc = htab->elf.irelplt;
9361 if (indx == 0)
9362 htab->local_ifunc_resolver = 1;
9363 else if (is_static_defined (h))
9364 htab->maybe_local_ifunc_resolver = 1;
9365 }
9366 if (sreloc == NULL)
9367 return FALSE;
9368
9369 loc = sreloc->contents;
9370 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
9371 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9372
9373 if (skip == -1)
9374 goto copy_reloc;
9375
9376 /* This reloc will be computed at runtime. Clear the memory
9377 so that it contains a predictable value for prelink. */
9378 if (!skip)
9379 {
9380 relocation = howto->pc_relative ? outrel.r_offset : 0;
9381 addend = 0;
9382 break;
9383 }
9384 }
9385 break;
9386
9387 case R_PPC_RELAX_PLT:
9388 case R_PPC_RELAX_PLTREL24:
9389 if (h != NULL)
9390 {
9391 struct plt_entry *ent;
9392 bfd_vma got2_addend = 0;
9393
9394 if (r_type == R_PPC_RELAX_PLTREL24)
9395 {
9396 if (bfd_link_pic (info))
9397 got2_addend = addend;
9398 addend = 0;
9399 }
9400 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9401 if (htab->plt_type == PLT_NEW)
9402 relocation = (htab->glink->output_section->vma
9403 + htab->glink->output_offset
9404 + ent->glink_offset);
9405 else
9406 relocation = (htab->elf.splt->output_section->vma
9407 + htab->elf.splt->output_offset
9408 + ent->plt.offset);
9409 }
9410 /* Fall through. */
9411
9412 case R_PPC_RELAX:
9413 {
9414 const int *stub;
9415 size_t size;
9416 size_t insn_offset = rel->r_offset;
9417 unsigned int insn;
9418
9419 if (bfd_link_pic (info))
9420 {
9421 relocation -= (input_section->output_section->vma
9422 + input_section->output_offset
9423 + rel->r_offset - 4);
9424 stub = shared_stub_entry;
9425 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9426 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9427 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9428 stub += 3;
9429 size = ARRAY_SIZE (shared_stub_entry) - 3;
9430 }
9431 else
9432 {
9433 stub = stub_entry;
9434 size = ARRAY_SIZE (stub_entry);
9435 }
9436
9437 relocation += addend;
9438 if (bfd_link_relocatable (info))
9439 relocation = 0;
9440
9441 /* First insn is HA, second is LO. */
9442 insn = *stub++;
9443 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9444 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9445 insn_offset += 4;
9446
9447 insn = *stub++;
9448 insn |= relocation & 0xffff;
9449 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9450 insn_offset += 4;
9451 size -= 2;
9452
9453 while (size != 0)
9454 {
9455 insn = *stub++;
9456 --size;
9457 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9458 insn_offset += 4;
9459 }
9460
9461 /* Rewrite the reloc and convert one of the trailing nop
9462 relocs to describe this relocation. */
9463 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9464 /* The relocs are at the bottom 2 bytes */
9465 wrel->r_offset = rel->r_offset + d_offset;
9466 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9467 wrel->r_addend = rel->r_addend;
9468 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9469 wrel++, rel++;
9470 wrel->r_offset += 4;
9471 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9472 }
9473 continue;
9474
9475 /* Indirect .sdata relocation. */
9476 case R_PPC_EMB_SDAI16:
9477 BFD_ASSERT (htab->sdata[0].section != NULL);
9478 if (!is_static_defined (htab->sdata[0].sym))
9479 {
9480 unresolved_reloc = TRUE;
9481 break;
9482 }
9483 relocation
9484 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9485 h, relocation, rel);
9486 addend = 0;
9487 break;
9488
9489 /* Indirect .sdata2 relocation. */
9490 case R_PPC_EMB_SDA2I16:
9491 BFD_ASSERT (htab->sdata[1].section != NULL);
9492 if (!is_static_defined (htab->sdata[1].sym))
9493 {
9494 unresolved_reloc = TRUE;
9495 break;
9496 }
9497 relocation
9498 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9499 h, relocation, rel);
9500 addend = 0;
9501 break;
9502
9503 /* Handle the TOC16 reloc. We want to use the offset within the .got
9504 section, not the actual VMA. This is appropriate when generating
9505 an embedded ELF object, for which the .got section acts like the
9506 AIX .toc section. */
9507 case R_PPC_TOC16: /* phony GOT16 relocations */
9508 if (sec == NULL || sec->output_section == NULL)
9509 {
9510 unresolved_reloc = TRUE;
9511 break;
9512 }
9513 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9514 ".got") == 0
9515 || strcmp (bfd_get_section_name (sec->owner, sec),
9516 ".cgot") == 0);
9517
9518 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9519 break;
9520
9521 case R_PPC_PLTREL24:
9522 if (h != NULL && ifunc == NULL)
9523 {
9524 struct plt_entry *ent;
9525
9526 ent = find_plt_ent (&h->plt.plist, got2,
9527 bfd_link_pic (info) ? addend : 0);
9528 if (ent == NULL
9529 || htab->elf.splt == NULL)
9530 {
9531 /* We didn't make a PLT entry for this symbol. This
9532 happens when statically linking PIC code, or when
9533 using -Bsymbolic. */
9534 }
9535 else
9536 {
9537 /* Relocation is to the entry for this symbol in the
9538 procedure linkage table. */
9539 unresolved_reloc = FALSE;
9540 if (htab->plt_type == PLT_NEW)
9541 relocation = (htab->glink->output_section->vma
9542 + htab->glink->output_offset
9543 + ent->glink_offset);
9544 else
9545 relocation = (htab->elf.splt->output_section->vma
9546 + htab->elf.splt->output_offset
9547 + ent->plt.offset);
9548 }
9549 }
9550
9551 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9552 addend specifies the GOT pointer offset within .got2.
9553 Don't apply it to the relocation field. */
9554 addend = 0;
9555 break;
9556
9557 case R_PPC_PLTSEQ:
9558 case R_PPC_PLTCALL:
9559 case R_PPC_PLT16_LO:
9560 case R_PPC_PLT16_HI:
9561 case R_PPC_PLT16_HA:
9562 plt_list = NULL;
9563 if (h != NULL)
9564 plt_list = &h->plt.plist;
9565 else if (ifunc != NULL)
9566 plt_list = ifunc;
9567 else if (local_got_offsets != NULL)
9568 {
9569 struct plt_entry **local_plt;
9570 local_plt = (struct plt_entry **) (local_got_offsets
9571 + symtab_hdr->sh_info);
9572 plt_list = local_plt + r_symndx;
9573 }
9574 unresolved_reloc = TRUE;
9575 if (plt_list != NULL)
9576 {
9577 struct plt_entry *ent;
9578
9579 ent = find_plt_ent (plt_list, got2,
9580 bfd_link_pic (info) ? addend : 0);
9581 if (ent != NULL && ent->plt.offset != (bfd_vma) -1)
9582 {
9583 asection *plt;
9584
9585 unresolved_reloc = FALSE;
9586 plt = htab->elf.splt;
9587 if (!htab->elf.dynamic_sections_created
9588 || h == NULL
9589 || h->dynindx == -1)
9590 {
9591 if (ifunc != NULL)
9592 plt = htab->elf.iplt;
9593 else
9594 plt = htab->pltlocal;
9595 }
9596 relocation = (plt->output_section->vma
9597 + plt->output_offset
9598 + ent->plt.offset);
9599 if (bfd_link_pic (info))
9600 {
9601 bfd_vma got = 0;
9602
9603 if (ent->addend >= 32768)
9604 got = (ent->addend
9605 + ent->sec->output_section->vma
9606 + ent->sec->output_offset);
9607 else
9608 got = SYM_VAL (htab->elf.hgot);
9609 relocation -= got;
9610 }
9611 }
9612 }
9613 addend = 0;
9614 break;
9615
9616 /* Relocate against _SDA_BASE_. */
9617 case R_PPC_SDAREL16:
9618 {
9619 const char *name;
9620 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9621
9622 if (sec == NULL
9623 || sec->output_section == NULL
9624 || !is_static_defined (sda))
9625 {
9626 unresolved_reloc = TRUE;
9627 break;
9628 }
9629 addend -= SYM_VAL (sda);
9630
9631 name = bfd_get_section_name (output_bfd, sec->output_section);
9632 if (!(strcmp (name, ".sdata") == 0
9633 || strcmp (name, ".sbss") == 0))
9634 {
9635 _bfd_error_handler
9636 /* xgettext:c-format */
9637 (_("%pB: the target (%s) of a %s relocation is "
9638 "in the wrong output section (%s)"),
9639 input_bfd,
9640 sym_name,
9641 howto->name,
9642 name);
9643 }
9644 }
9645 break;
9646
9647 /* Relocate against _SDA2_BASE_. */
9648 case R_PPC_EMB_SDA2REL:
9649 {
9650 const char *name;
9651 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9652
9653 if (sec == NULL
9654 || sec->output_section == NULL
9655 || !is_static_defined (sda))
9656 {
9657 unresolved_reloc = TRUE;
9658 break;
9659 }
9660 addend -= SYM_VAL (sda);
9661
9662 name = bfd_get_section_name (output_bfd, sec->output_section);
9663 if (!(strcmp (name, ".sdata2") == 0
9664 || strcmp (name, ".sbss2") == 0))
9665 {
9666 _bfd_error_handler
9667 /* xgettext:c-format */
9668 (_("%pB: the target (%s) of a %s relocation is "
9669 "in the wrong output section (%s)"),
9670 input_bfd,
9671 sym_name,
9672 howto->name,
9673 name);
9674 }
9675 }
9676 break;
9677
9678 case R_PPC_VLE_LO16A:
9679 relocation = relocation + addend;
9680 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9681 contents + rel->r_offset, relocation,
9682 split16a_type, htab->params->vle_reloc_fixup);
9683 goto copy_reloc;
9684
9685 case R_PPC_VLE_LO16D:
9686 relocation = relocation + addend;
9687 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9688 contents + rel->r_offset, relocation,
9689 split16d_type, htab->params->vle_reloc_fixup);
9690 goto copy_reloc;
9691
9692 case R_PPC_VLE_HI16A:
9693 relocation = (relocation + addend) >> 16;
9694 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9695 contents + rel->r_offset, relocation,
9696 split16a_type, htab->params->vle_reloc_fixup);
9697 goto copy_reloc;
9698
9699 case R_PPC_VLE_HI16D:
9700 relocation = (relocation + addend) >> 16;
9701 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9702 contents + rel->r_offset, relocation,
9703 split16d_type, htab->params->vle_reloc_fixup);
9704 goto copy_reloc;
9705
9706 case R_PPC_VLE_HA16A:
9707 relocation = (relocation + addend + 0x8000) >> 16;
9708 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9709 contents + rel->r_offset, relocation,
9710 split16a_type, htab->params->vle_reloc_fixup);
9711 goto copy_reloc;
9712
9713 case R_PPC_VLE_HA16D:
9714 relocation = (relocation + addend + 0x8000) >> 16;
9715 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9716 contents + rel->r_offset, relocation,
9717 split16d_type, htab->params->vle_reloc_fixup);
9718 goto copy_reloc;
9719
9720 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9721 case R_PPC_EMB_SDA21:
9722 case R_PPC_VLE_SDA21:
9723 case R_PPC_EMB_RELSDA:
9724 case R_PPC_VLE_SDA21_LO:
9725 {
9726 const char *name;
9727 int reg;
9728 unsigned int insn;
9729 struct elf_link_hash_entry *sda = NULL;
9730
9731 if (sec == NULL || sec->output_section == NULL)
9732 {
9733 unresolved_reloc = TRUE;
9734 break;
9735 }
9736
9737 name = bfd_get_section_name (output_bfd, sec->output_section);
9738 if (strcmp (name, ".sdata") == 0
9739 || strcmp (name, ".sbss") == 0)
9740 {
9741 reg = 13;
9742 sda = htab->sdata[0].sym;
9743 }
9744 else if (strcmp (name, ".sdata2") == 0
9745 || strcmp (name, ".sbss2") == 0)
9746 {
9747 reg = 2;
9748 sda = htab->sdata[1].sym;
9749 }
9750 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9751 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9752 {
9753 reg = 0;
9754 }
9755 else
9756 {
9757 _bfd_error_handler
9758 /* xgettext:c-format */
9759 (_("%pB: the target (%s) of a %s relocation is "
9760 "in the wrong output section (%s)"),
9761 input_bfd,
9762 sym_name,
9763 howto->name,
9764 name);
9765
9766 bfd_set_error (bfd_error_bad_value);
9767 ret = FALSE;
9768 goto copy_reloc;
9769 }
9770
9771 if (sda != NULL)
9772 {
9773 if (!is_static_defined (sda))
9774 {
9775 unresolved_reloc = TRUE;
9776 break;
9777 }
9778 addend -= SYM_VAL (sda);
9779 }
9780
9781 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9782 if (reg == 0
9783 && (r_type == R_PPC_VLE_SDA21
9784 || r_type == R_PPC_VLE_SDA21_LO))
9785 {
9786 relocation = relocation + addend;
9787 addend = 0;
9788
9789 /* Force e_li insn, keeping RT from original insn. */
9790 insn &= 0x1f << 21;
9791 insn |= 28u << 26;
9792
9793 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9794 /* Top 4 bits of value to 17..20. */
9795 insn |= (relocation & 0xf0000) >> 5;
9796 /* Next 5 bits of the value to 11..15. */
9797 insn |= (relocation & 0xf800) << 5;
9798 /* And the final 11 bits of the value to bits 21 to 31. */
9799 insn |= relocation & 0x7ff;
9800
9801 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9802
9803 if (r_type == R_PPC_VLE_SDA21
9804 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9805 goto overflow;
9806 goto copy_reloc;
9807 }
9808 else if (r_type == R_PPC_EMB_SDA21
9809 || r_type == R_PPC_VLE_SDA21
9810 || r_type == R_PPC_VLE_SDA21_LO)
9811 {
9812 /* Fill in register field. */
9813 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9814 }
9815 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9816 }
9817 break;
9818
9819 case R_PPC_VLE_SDAREL_LO16A:
9820 case R_PPC_VLE_SDAREL_LO16D:
9821 case R_PPC_VLE_SDAREL_HI16A:
9822 case R_PPC_VLE_SDAREL_HI16D:
9823 case R_PPC_VLE_SDAREL_HA16A:
9824 case R_PPC_VLE_SDAREL_HA16D:
9825 {
9826 bfd_vma value;
9827 const char *name;
9828 struct elf_link_hash_entry *sda = NULL;
9829
9830 if (sec == NULL || sec->output_section == NULL)
9831 {
9832 unresolved_reloc = TRUE;
9833 break;
9834 }
9835
9836 name = bfd_get_section_name (output_bfd, sec->output_section);
9837 if (strcmp (name, ".sdata") == 0
9838 || strcmp (name, ".sbss") == 0)
9839 sda = htab->sdata[0].sym;
9840 else if (strcmp (name, ".sdata2") == 0
9841 || strcmp (name, ".sbss2") == 0)
9842 sda = htab->sdata[1].sym;
9843 else
9844 {
9845 _bfd_error_handler
9846 /* xgettext:c-format */
9847 (_("%pB: the target (%s) of a %s relocation is "
9848 "in the wrong output section (%s)"),
9849 input_bfd,
9850 sym_name,
9851 howto->name,
9852 name);
9853
9854 bfd_set_error (bfd_error_bad_value);
9855 ret = FALSE;
9856 goto copy_reloc;
9857 }
9858
9859 if (sda == NULL || !is_static_defined (sda))
9860 {
9861 unresolved_reloc = TRUE;
9862 break;
9863 }
9864 value = relocation + addend - SYM_VAL (sda);
9865
9866 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9867 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9868 contents + rel->r_offset, value,
9869 split16a_type,
9870 htab->params->vle_reloc_fixup);
9871 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9872 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9873 contents + rel->r_offset, value,
9874 split16d_type,
9875 htab->params->vle_reloc_fixup);
9876 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9877 {
9878 value = value >> 16;
9879 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9880 contents + rel->r_offset, value,
9881 split16a_type,
9882 htab->params->vle_reloc_fixup);
9883 }
9884 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9885 {
9886 value = value >> 16;
9887 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9888 contents + rel->r_offset, value,
9889 split16d_type,
9890 htab->params->vle_reloc_fixup);
9891 }
9892 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9893 {
9894 value = (value + 0x8000) >> 16;
9895 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9896 contents + rel->r_offset, value,
9897 split16a_type,
9898 htab->params->vle_reloc_fixup);
9899 }
9900 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9901 {
9902 value = (value + 0x8000) >> 16;
9903 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9904 contents + rel->r_offset, value,
9905 split16d_type,
9906 htab->params->vle_reloc_fixup);
9907 }
9908 }
9909 goto copy_reloc;
9910
9911 case R_PPC_VLE_ADDR20:
9912 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9913 continue;
9914
9915 /* Relocate against the beginning of the section. */
9916 case R_PPC_SECTOFF:
9917 case R_PPC_SECTOFF_LO:
9918 case R_PPC_SECTOFF_HI:
9919 case R_PPC_SECTOFF_HA:
9920 if (sec == NULL || sec->output_section == NULL)
9921 {
9922 unresolved_reloc = TRUE;
9923 break;
9924 }
9925 addend -= sec->output_section->vma;
9926 break;
9927
9928 /* Negative relocations. */
9929 case R_PPC_EMB_NADDR32:
9930 case R_PPC_EMB_NADDR16:
9931 case R_PPC_EMB_NADDR16_LO:
9932 case R_PPC_EMB_NADDR16_HI:
9933 case R_PPC_EMB_NADDR16_HA:
9934 addend -= 2 * relocation;
9935 break;
9936
9937 case R_PPC_COPY:
9938 case R_PPC_GLOB_DAT:
9939 case R_PPC_JMP_SLOT:
9940 case R_PPC_RELATIVE:
9941 case R_PPC_IRELATIVE:
9942 case R_PPC_PLT32:
9943 case R_PPC_PLTREL32:
9944 case R_PPC_ADDR30:
9945 case R_PPC_EMB_RELSEC16:
9946 case R_PPC_EMB_RELST_LO:
9947 case R_PPC_EMB_RELST_HI:
9948 case R_PPC_EMB_RELST_HA:
9949 case R_PPC_EMB_BIT_FLD:
9950 /* xgettext:c-format */
9951 _bfd_error_handler (_("%pB: %s unsupported"),
9952 input_bfd, howto->name);
9953
9954 bfd_set_error (bfd_error_invalid_operation);
9955 ret = FALSE;
9956 goto copy_reloc;
9957 }
9958
9959 switch (r_type)
9960 {
9961 default:
9962 break;
9963
9964 case R_PPC_PLTCALL:
9965 if (unresolved_reloc)
9966 {
9967 bfd_byte *p = contents + rel->r_offset;
9968 unsigned int insn = bfd_get_32 (input_bfd, p);
9969 insn &= 1;
9970 bfd_put_32 (input_bfd, B | insn, p);
9971 unresolved_reloc = save_unresolved_reloc;
9972 r_type = R_PPC_REL24;
9973 howto = ppc_elf_howto_table[r_type];
9974 }
9975 else if (htab->plt_type != PLT_NEW)
9976 info->callbacks->einfo
9977 (_("%P: %H: %s relocation unsupported for bss-plt\n"),
9978 input_bfd, input_section, rel->r_offset,
9979 howto->name);
9980 break;
9981
9982 case R_PPC_PLTSEQ:
9983 case R_PPC_PLT16_HA:
9984 case R_PPC_PLT16_LO:
9985 if (unresolved_reloc)
9986 {
9987 bfd_byte *p = contents + (rel->r_offset & ~3);
9988 bfd_put_32 (input_bfd, NOP, p);
9989 unresolved_reloc = FALSE;
9990 r_type = R_PPC_NONE;
9991 howto = ppc_elf_howto_table[r_type];
9992 }
9993 else if (htab->plt_type != PLT_NEW)
9994 info->callbacks->einfo
9995 (_("%P: %H: %s relocation unsupported for bss-plt\n"),
9996 input_bfd, input_section, rel->r_offset,
9997 howto->name);
9998 break;
9999 }
10000
10001 /* Do any further special processing. */
10002 switch (r_type)
10003 {
10004 default:
10005 break;
10006
10007 case R_PPC_ADDR16_HA:
10008 case R_PPC_REL16_HA:
10009 case R_PPC_REL16DX_HA:
10010 case R_PPC_SECTOFF_HA:
10011 case R_PPC_TPREL16_HA:
10012 case R_PPC_DTPREL16_HA:
10013 case R_PPC_EMB_NADDR16_HA:
10014 case R_PPC_EMB_RELST_HA:
10015 /* It's just possible that this symbol is a weak symbol
10016 that's not actually defined anywhere. In that case,
10017 'sec' would be NULL, and we should leave the symbol
10018 alone (it will be set to zero elsewhere in the link). */
10019 if (sec == NULL)
10020 break;
10021 /* Fall through. */
10022
10023 case R_PPC_PLT16_HA:
10024 case R_PPC_GOT16_HA:
10025 case R_PPC_GOT_TLSGD16_HA:
10026 case R_PPC_GOT_TLSLD16_HA:
10027 case R_PPC_GOT_TPREL16_HA:
10028 case R_PPC_GOT_DTPREL16_HA:
10029 /* Add 0x10000 if sign bit in 0:15 is set.
10030 Bits 0:15 are not used. */
10031 addend += 0x8000;
10032 break;
10033
10034 case R_PPC_ADDR16:
10035 case R_PPC_ADDR16_LO:
10036 case R_PPC_GOT16:
10037 case R_PPC_GOT16_LO:
10038 case R_PPC_SDAREL16:
10039 case R_PPC_SECTOFF:
10040 case R_PPC_SECTOFF_LO:
10041 case R_PPC_DTPREL16:
10042 case R_PPC_DTPREL16_LO:
10043 case R_PPC_TPREL16:
10044 case R_PPC_TPREL16_LO:
10045 case R_PPC_GOT_TLSGD16:
10046 case R_PPC_GOT_TLSGD16_LO:
10047 case R_PPC_GOT_TLSLD16:
10048 case R_PPC_GOT_TLSLD16_LO:
10049 case R_PPC_GOT_DTPREL16:
10050 case R_PPC_GOT_DTPREL16_LO:
10051 case R_PPC_GOT_TPREL16:
10052 case R_PPC_GOT_TPREL16_LO:
10053 {
10054 /* The 32-bit ABI lacks proper relocations to deal with
10055 certain 64-bit instructions. Prevent damage to bits
10056 that make up part of the insn opcode. */
10057 unsigned int insn, mask, lobit;
10058
10059 insn = bfd_get_32 (input_bfd,
10060 contents + rel->r_offset - d_offset);
10061 mask = 0;
10062 if (is_insn_ds_form (insn))
10063 mask = 3;
10064 else if (is_insn_dq_form (insn))
10065 mask = 15;
10066 else
10067 break;
10068 relocation += addend;
10069 addend = insn & mask;
10070 lobit = mask & relocation;
10071 if (lobit != 0)
10072 {
10073 relocation ^= lobit;
10074 info->callbacks->einfo
10075 /* xgettext:c-format */
10076 (_("%H: error: %s against `%s' not a multiple of %u\n"),
10077 input_bfd, input_section, rel->r_offset,
10078 howto->name, sym_name, mask + 1);
10079 bfd_set_error (bfd_error_bad_value);
10080 ret = FALSE;
10081 }
10082 }
10083 break;
10084 }
10085
10086 #ifdef DEBUG
10087 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
10088 "offset = %ld, addend = %ld\n",
10089 howto->name,
10090 (int) r_type,
10091 sym_name,
10092 r_symndx,
10093 (long) rel->r_offset,
10094 (long) addend);
10095 #endif
10096
10097 if (unresolved_reloc
10098 && !((input_section->flags & SEC_DEBUGGING) != 0
10099 && h->def_dynamic)
10100 && _bfd_elf_section_offset (output_bfd, info, input_section,
10101 rel->r_offset) != (bfd_vma) -1)
10102 {
10103 info->callbacks->einfo
10104 /* xgettext:c-format */
10105 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
10106 input_bfd, input_section, rel->r_offset,
10107 howto->name,
10108 sym_name);
10109 ret = FALSE;
10110 }
10111
10112 /* 16-bit fields in insns mostly have signed values, but a
10113 few insns have 16-bit unsigned values. Really, we should
10114 have different reloc types. */
10115 if (howto->complain_on_overflow != complain_overflow_dont
10116 && howto->dst_mask == 0xffff
10117 && (input_section->flags & SEC_CODE) != 0)
10118 {
10119 enum complain_overflow complain = complain_overflow_signed;
10120
10121 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
10122 {
10123 unsigned int insn;
10124
10125 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10126 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
10127 complain = complain_overflow_bitfield;
10128 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
10129 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
10130 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
10131 complain = complain_overflow_unsigned;
10132 }
10133 if (howto->complain_on_overflow != complain)
10134 {
10135 alt_howto = *howto;
10136 alt_howto.complain_on_overflow = complain;
10137 howto = &alt_howto;
10138 }
10139 }
10140
10141 if (r_type == R_PPC_REL16DX_HA)
10142 {
10143 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
10144 if (rel->r_offset + 4 > input_section->size)
10145 r = bfd_reloc_outofrange;
10146 else
10147 {
10148 unsigned int insn;
10149
10150 relocation += addend;
10151 relocation -= (rel->r_offset
10152 + input_section->output_offset
10153 + input_section->output_section->vma);
10154 relocation >>= 16;
10155 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
10156 insn &= ~0x1fffc1;
10157 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
10158 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
10159 r = bfd_reloc_ok;
10160 }
10161 }
10162 else
10163 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
10164 rel->r_offset, relocation, addend);
10165
10166 if (r != bfd_reloc_ok)
10167 {
10168 if (r == bfd_reloc_overflow)
10169 {
10170 overflow:
10171 /* On code like "if (foo) foo();" don't report overflow
10172 on a branch to zero when foo is undefined. */
10173 if (!warned
10174 && !(h != NULL
10175 && (h->root.type == bfd_link_hash_undefweak
10176 || h->root.type == bfd_link_hash_undefined)
10177 && is_branch_reloc (r_type)))
10178 info->callbacks->reloc_overflow
10179 (info, (h ? &h->root : NULL), sym_name, howto->name,
10180 rel->r_addend, input_bfd, input_section, rel->r_offset);
10181 }
10182 else
10183 {
10184 info->callbacks->einfo
10185 /* xgettext:c-format */
10186 (_("%H: %s reloc against `%s': error %d\n"),
10187 input_bfd, input_section, rel->r_offset,
10188 howto->name, sym_name, (int) r);
10189 ret = FALSE;
10190 }
10191 }
10192 copy_reloc:
10193 if (wrel != rel)
10194 *wrel = *rel;
10195 }
10196
10197 if (wrel != rel)
10198 {
10199 Elf_Internal_Shdr *rel_hdr;
10200 size_t deleted = rel - wrel;
10201
10202 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
10203 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
10204 if (rel_hdr->sh_size == 0)
10205 {
10206 /* It is too late to remove an empty reloc section. Leave
10207 one NONE reloc.
10208 ??? What is wrong with an empty section??? */
10209 rel_hdr->sh_size = rel_hdr->sh_entsize;
10210 deleted -= 1;
10211 wrel++;
10212 }
10213 relend = wrel;
10214 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
10215 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
10216 input_section->reloc_count -= deleted;
10217 }
10218
10219 #ifdef DEBUG
10220 fprintf (stderr, "\n");
10221 #endif
10222
10223 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
10224 && input_section->size != input_section->rawsize
10225 && (strcmp (input_section->output_section->name, ".init") == 0
10226 || strcmp (input_section->output_section->name, ".fini") == 0))
10227 {
10228 /* Branch around the trampolines. */
10229 unsigned int insn = B + input_section->size - input_section->rawsize;
10230 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
10231 }
10232
10233 if (htab->params->ppc476_workaround
10234 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
10235 && (!bfd_link_relocatable (info)
10236 || (input_section->output_section->alignment_power
10237 >= htab->params->pagesize_p2)))
10238 {
10239 bfd_vma start_addr, end_addr, addr;
10240 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10241
10242 if (relax_info->workaround_size != 0)
10243 {
10244 bfd_byte *p;
10245 unsigned int n;
10246 bfd_byte fill[4];
10247
10248 bfd_put_32 (input_bfd, BA, fill);
10249 p = contents + input_section->size - relax_info->workaround_size;
10250 n = relax_info->workaround_size >> 2;
10251 while (n--)
10252 {
10253 memcpy (p, fill, 4);
10254 p += 4;
10255 }
10256 }
10257
10258 /* The idea is: Replace the last instruction on a page with a
10259 branch to a patch area. Put the insn there followed by a
10260 branch back to the next page. Complicated a little by
10261 needing to handle moved conditional branches, and by not
10262 wanting to touch data-in-text. */
10263
10264 start_addr = (input_section->output_section->vma
10265 + input_section->output_offset);
10266 end_addr = (start_addr + input_section->size
10267 - relax_info->workaround_size);
10268 for (addr = ((start_addr & -pagesize) + pagesize - 4);
10269 addr < end_addr;
10270 addr += pagesize)
10271 {
10272 bfd_vma offset = addr - start_addr;
10273 Elf_Internal_Rela *lo, *hi;
10274 bfd_boolean is_data;
10275 bfd_vma patch_off, patch_addr;
10276 unsigned int insn;
10277
10278 /* Do we have a data reloc at this offset? If so, leave
10279 the word alone. */
10280 is_data = FALSE;
10281 lo = relocs;
10282 hi = relend;
10283 rel = NULL;
10284 while (lo < hi)
10285 {
10286 rel = lo + (hi - lo) / 2;
10287 if (rel->r_offset < offset)
10288 lo = rel + 1;
10289 else if (rel->r_offset > offset + 3)
10290 hi = rel;
10291 else
10292 {
10293 switch (ELF32_R_TYPE (rel->r_info))
10294 {
10295 case R_PPC_ADDR32:
10296 case R_PPC_UADDR32:
10297 case R_PPC_REL32:
10298 case R_PPC_ADDR30:
10299 is_data = TRUE;
10300 break;
10301 default:
10302 break;
10303 }
10304 break;
10305 }
10306 }
10307 if (is_data)
10308 continue;
10309
10310 /* Some instructions can be left alone too. Unconditional
10311 branches, except for bcctr with BO=0x14 (bctr, bctrl),
10312 avoid the icache failure.
10313
10314 The problem occurs due to prefetch across a page boundary
10315 where stale instructions can be fetched from the next
10316 page, and the mechanism for flushing these bad
10317 instructions fails under certain circumstances. The
10318 unconditional branches:
10319 1) Branch: b, bl, ba, bla,
10320 2) Branch Conditional: bc, bca, bcl, bcla,
10321 3) Branch Conditional to Link Register: bclr, bclrl,
10322 where (2) and (3) have BO=0x14 making them unconditional,
10323 prevent the bad prefetch because the prefetch itself is
10324 affected by these instructions. This happens even if the
10325 instruction is not executed.
10326
10327 A bctr example:
10328 .
10329 . lis 9,new_page@ha
10330 . addi 9,9,new_page@l
10331 . mtctr 9
10332 . bctr
10333 . nop
10334 . nop
10335 . new_page:
10336 .
10337 The bctr is not predicted taken due to ctr not being
10338 ready, so prefetch continues on past the bctr into the
10339 new page which might have stale instructions. If they
10340 fail to be flushed, then they will be executed after the
10341 bctr executes. Either of the following modifications
10342 prevent the bad prefetch from happening in the first
10343 place:
10344 .
10345 . lis 9,new_page@ha lis 9,new_page@ha
10346 . addi 9,9,new_page@l addi 9,9,new_page@l
10347 . mtctr 9 mtctr 9
10348 . bctr bctr
10349 . nop b somewhere_else
10350 . b somewhere_else nop
10351 . new_page: new_page:
10352 . */
10353 insn = bfd_get_32 (input_bfd, contents + offset);
10354 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
10355 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
10356 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
10357 || ((insn & (0x3f << 26)) == (19u << 26)
10358 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
10359 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
10360 continue;
10361
10362 patch_addr = (start_addr + input_section->size
10363 - relax_info->workaround_size);
10364 patch_addr = (patch_addr + 15) & -16;
10365 patch_off = patch_addr - start_addr;
10366 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
10367
10368 if (rel != NULL
10369 && rel->r_offset >= offset
10370 && rel->r_offset < offset + 4)
10371 {
10372 asection *sreloc;
10373
10374 /* If the insn we are patching had a reloc, adjust the
10375 reloc r_offset so that the reloc applies to the moved
10376 location. This matters for -r and --emit-relocs. */
10377 if (rel + 1 != relend)
10378 {
10379 Elf_Internal_Rela tmp = *rel;
10380
10381 /* Keep the relocs sorted by r_offset. */
10382 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
10383 relend[-1] = tmp;
10384 }
10385 relend[-1].r_offset += patch_off - offset;
10386
10387 /* Adjust REL16 addends too. */
10388 switch (ELF32_R_TYPE (relend[-1].r_info))
10389 {
10390 case R_PPC_REL16:
10391 case R_PPC_REL16_LO:
10392 case R_PPC_REL16_HI:
10393 case R_PPC_REL16_HA:
10394 relend[-1].r_addend += patch_off - offset;
10395 break;
10396 default:
10397 break;
10398 }
10399
10400 /* If we are building a PIE or shared library with
10401 non-PIC objects, perhaps we had a dynamic reloc too?
10402 If so, the dynamic reloc must move with the insn. */
10403 sreloc = elf_section_data (input_section)->sreloc;
10404 if (sreloc != NULL)
10405 {
10406 Elf32_External_Rela *slo, *shi, *srelend;
10407 bfd_vma soffset;
10408
10409 slo = (Elf32_External_Rela *) sreloc->contents;
10410 shi = srelend = slo + sreloc->reloc_count;
10411 soffset = (offset + input_section->output_section->vma
10412 + input_section->output_offset);
10413 while (slo < shi)
10414 {
10415 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
10416 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
10417 &outrel);
10418 if (outrel.r_offset < soffset)
10419 slo = srel + 1;
10420 else if (outrel.r_offset > soffset + 3)
10421 shi = srel;
10422 else
10423 {
10424 if (srel + 1 != srelend)
10425 {
10426 memmove (srel, srel + 1,
10427 (srelend - (srel + 1)) * sizeof (*srel));
10428 srel = srelend - 1;
10429 }
10430 outrel.r_offset += patch_off - offset;
10431 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
10432 (bfd_byte *) srel);
10433 break;
10434 }
10435 }
10436 }
10437 }
10438 else
10439 rel = NULL;
10440
10441 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
10442 && (insn & 2) == 0 /* relative */)
10443 {
10444 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
10445
10446 delta += offset - patch_off;
10447 if (bfd_link_relocatable (info) && rel != NULL)
10448 delta = 0;
10449 if (!bfd_link_relocatable (info) && rel != NULL)
10450 {
10451 enum elf_ppc_reloc_type r_type;
10452
10453 r_type = ELF32_R_TYPE (relend[-1].r_info);
10454 if (r_type == R_PPC_REL14_BRTAKEN)
10455 insn |= BRANCH_PREDICT_BIT;
10456 else if (r_type == R_PPC_REL14_BRNTAKEN)
10457 insn &= ~BRANCH_PREDICT_BIT;
10458 else
10459 BFD_ASSERT (r_type == R_PPC_REL14);
10460
10461 if ((r_type == R_PPC_REL14_BRTAKEN
10462 || r_type == R_PPC_REL14_BRNTAKEN)
10463 && delta + 0x8000 < 0x10000
10464 && (bfd_signed_vma) delta < 0)
10465 insn ^= BRANCH_PREDICT_BIT;
10466 }
10467 if (delta + 0x8000 < 0x10000)
10468 {
10469 bfd_put_32 (input_bfd,
10470 (insn & ~0xfffc) | (delta & 0xfffc),
10471 contents + patch_off);
10472 patch_off += 4;
10473 bfd_put_32 (input_bfd,
10474 B | ((offset + 4 - patch_off) & 0x3fffffc),
10475 contents + patch_off);
10476 patch_off += 4;
10477 }
10478 else
10479 {
10480 if (rel != NULL)
10481 {
10482 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10483
10484 relend[-1].r_offset += 8;
10485 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10486 }
10487 bfd_put_32 (input_bfd,
10488 (insn & ~0xfffc) | 8,
10489 contents + patch_off);
10490 patch_off += 4;
10491 bfd_put_32 (input_bfd,
10492 B | ((offset + 4 - patch_off) & 0x3fffffc),
10493 contents + patch_off);
10494 patch_off += 4;
10495 bfd_put_32 (input_bfd,
10496 B | ((delta - 8) & 0x3fffffc),
10497 contents + patch_off);
10498 patch_off += 4;
10499 }
10500 }
10501 else
10502 {
10503 bfd_put_32 (input_bfd, insn, contents + patch_off);
10504 patch_off += 4;
10505 bfd_put_32 (input_bfd,
10506 B | ((offset + 4 - patch_off) & 0x3fffffc),
10507 contents + patch_off);
10508 patch_off += 4;
10509 }
10510 BFD_ASSERT (patch_off <= input_section->size);
10511 relax_info->workaround_size = input_section->size - patch_off;
10512 }
10513 }
10514
10515 return ret;
10516 }
10517 \f
10518 /* Write out the PLT relocs and entries for H. */
10519
10520 static bfd_boolean
10521 write_global_sym_plt (struct elf_link_hash_entry *h, void *inf)
10522 {
10523 struct bfd_link_info *info = (struct bfd_link_info *) inf;
10524 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10525 struct plt_entry *ent;
10526 bfd_boolean doneone;
10527
10528 doneone = FALSE;
10529 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10530 if (ent->plt.offset != (bfd_vma) -1)
10531 {
10532 if (!doneone)
10533 {
10534 Elf_Internal_Rela rela;
10535 bfd_byte *loc;
10536 bfd_vma reloc_index;
10537 asection *plt = htab->elf.splt;
10538 asection *relplt = htab->elf.srelplt;
10539
10540 if (htab->plt_type == PLT_NEW
10541 || !htab->elf.dynamic_sections_created
10542 || h->dynindx == -1)
10543 reloc_index = ent->plt.offset / 4;
10544 else
10545 {
10546 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10547 / htab->plt_slot_size);
10548 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10549 && htab->plt_type == PLT_OLD)
10550 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10551 }
10552
10553 /* This symbol has an entry in the procedure linkage table.
10554 Set it up. */
10555 if (htab->plt_type == PLT_VXWORKS
10556 && htab->elf.dynamic_sections_created
10557 && h->dynindx != -1)
10558 {
10559 bfd_vma got_offset;
10560 const bfd_vma *plt_entry;
10561
10562 /* The first three entries in .got.plt are reserved. */
10563 got_offset = (reloc_index + 3) * 4;
10564
10565 /* Use the right PLT. */
10566 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10567 : ppc_elf_vxworks_plt_entry;
10568
10569 /* Fill in the .plt on VxWorks. */
10570 if (bfd_link_pic (info))
10571 {
10572 bfd_put_32 (info->output_bfd,
10573 plt_entry[0] | PPC_HA (got_offset),
10574 plt->contents + ent->plt.offset + 0);
10575 bfd_put_32 (info->output_bfd,
10576 plt_entry[1] | PPC_LO (got_offset),
10577 plt->contents + ent->plt.offset + 4);
10578 }
10579 else
10580 {
10581 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10582
10583 bfd_put_32 (info->output_bfd,
10584 plt_entry[0] | PPC_HA (got_loc),
10585 plt->contents + ent->plt.offset + 0);
10586 bfd_put_32 (info->output_bfd,
10587 plt_entry[1] | PPC_LO (got_loc),
10588 plt->contents + ent->plt.offset + 4);
10589 }
10590
10591 bfd_put_32 (info->output_bfd, plt_entry[2],
10592 plt->contents + ent->plt.offset + 8);
10593 bfd_put_32 (info->output_bfd, plt_entry[3],
10594 plt->contents + ent->plt.offset + 12);
10595
10596 /* This instruction is an immediate load. The value loaded is
10597 the byte offset of the R_PPC_JMP_SLOT relocation from the
10598 start of the .rela.plt section. The value is stored in the
10599 low-order 16 bits of the load instruction. */
10600 /* NOTE: It appears that this is now an index rather than a
10601 prescaled offset. */
10602 bfd_put_32 (info->output_bfd,
10603 plt_entry[4] | reloc_index,
10604 plt->contents + ent->plt.offset + 16);
10605 /* This instruction is a PC-relative branch whose target is
10606 the start of the PLT section. The address of this branch
10607 instruction is 20 bytes beyond the start of this PLT entry.
10608 The address is encoded in bits 6-29, inclusive. The value
10609 stored is right-shifted by two bits, permitting a 26-bit
10610 offset. */
10611 bfd_put_32 (info->output_bfd,
10612 (plt_entry[5]
10613 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10614 plt->contents + ent->plt.offset + 20);
10615 bfd_put_32 (info->output_bfd, plt_entry[6],
10616 plt->contents + ent->plt.offset + 24);
10617 bfd_put_32 (info->output_bfd, plt_entry[7],
10618 plt->contents + ent->plt.offset + 28);
10619
10620 /* Fill in the GOT entry corresponding to this PLT slot with
10621 the address immediately after the "bctr" instruction
10622 in this PLT entry. */
10623 bfd_put_32 (info->output_bfd, (plt->output_section->vma
10624 + plt->output_offset
10625 + ent->plt.offset + 16),
10626 htab->elf.sgotplt->contents + got_offset);
10627
10628 if (!bfd_link_pic (info))
10629 {
10630 /* Fill in a couple of entries in .rela.plt.unloaded. */
10631 loc = htab->srelplt2->contents
10632 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10633 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10634 * sizeof (Elf32_External_Rela));
10635
10636 /* Provide the @ha relocation for the first instruction. */
10637 rela.r_offset = (plt->output_section->vma
10638 + plt->output_offset
10639 + ent->plt.offset + 2);
10640 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10641 R_PPC_ADDR16_HA);
10642 rela.r_addend = got_offset;
10643 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10644 loc += sizeof (Elf32_External_Rela);
10645
10646 /* Provide the @l relocation for the second instruction. */
10647 rela.r_offset = (plt->output_section->vma
10648 + plt->output_offset
10649 + ent->plt.offset + 6);
10650 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10651 R_PPC_ADDR16_LO);
10652 rela.r_addend = got_offset;
10653 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10654 loc += sizeof (Elf32_External_Rela);
10655
10656 /* Provide a relocation for the GOT entry corresponding to this
10657 PLT slot. Point it at the middle of the .plt entry. */
10658 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10659 + htab->elf.sgotplt->output_offset
10660 + got_offset);
10661 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10662 R_PPC_ADDR32);
10663 rela.r_addend = ent->plt.offset + 16;
10664 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10665 }
10666
10667 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10668 In particular, the offset for the relocation is not the
10669 address of the PLT entry for this function, as specified
10670 by the ABI. Instead, the offset is set to the address of
10671 the GOT slot for this function. See EABI 4.4.4.1. */
10672 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10673 + htab->elf.sgotplt->output_offset
10674 + got_offset);
10675 rela.r_addend = 0;
10676 }
10677 else
10678 {
10679 rela.r_addend = 0;
10680 if (!htab->elf.dynamic_sections_created
10681 || h->dynindx == -1)
10682 {
10683 if (h->type == STT_GNU_IFUNC)
10684 {
10685 plt = htab->elf.iplt;
10686 relplt = htab->elf.irelplt;
10687 }
10688 else
10689 {
10690 plt = htab->pltlocal;
10691 relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL;
10692 }
10693 if (h->def_regular
10694 && (h->root.type == bfd_link_hash_defined
10695 || h->root.type == bfd_link_hash_defweak))
10696 rela.r_addend = SYM_VAL (h);
10697 }
10698
10699 if (relplt == NULL)
10700 {
10701 loc = plt->contents + ent->plt.offset;
10702 bfd_put_32 (info->output_bfd, rela.r_addend, loc);
10703 }
10704 else
10705 {
10706 rela.r_offset = (plt->output_section->vma
10707 + plt->output_offset
10708 + ent->plt.offset);
10709
10710 if (htab->plt_type == PLT_OLD
10711 || !htab->elf.dynamic_sections_created
10712 || h->dynindx == -1)
10713 {
10714 /* We don't need to fill in the .plt. The ppc dynamic
10715 linker will fill it in. */
10716 }
10717 else
10718 {
10719 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10720 + htab->glink->output_section->vma
10721 + htab->glink->output_offset);
10722 bfd_put_32 (info->output_bfd, val,
10723 plt->contents + ent->plt.offset);
10724 }
10725 }
10726 }
10727
10728 if (relplt != NULL)
10729 {
10730 /* Fill in the entry in the .rela.plt section. */
10731 if (!htab->elf.dynamic_sections_created
10732 || h->dynindx == -1)
10733 {
10734 if (h->type == STT_GNU_IFUNC)
10735 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10736 else
10737 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
10738 loc = relplt->contents + (relplt->reloc_count++
10739 * sizeof (Elf32_External_Rela));
10740 htab->local_ifunc_resolver = 1;
10741 }
10742 else
10743 {
10744 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10745 loc = relplt->contents + (reloc_index
10746 * sizeof (Elf32_External_Rela));
10747 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10748 htab->maybe_local_ifunc_resolver = 1;
10749 }
10750 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10751 }
10752 doneone = TRUE;
10753 }
10754
10755 if (htab->plt_type == PLT_NEW
10756 || !htab->elf.dynamic_sections_created
10757 || h->dynindx == -1)
10758 {
10759 unsigned char *p;
10760 asection *plt = htab->elf.splt;
10761
10762 if (!htab->elf.dynamic_sections_created
10763 || h->dynindx == -1)
10764 {
10765 if (h->type == STT_GNU_IFUNC)
10766 plt = htab->elf.iplt;
10767 else
10768 break;
10769 }
10770
10771 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10772 write_glink_stub (h, ent, plt, p, info);
10773
10774 if (!bfd_link_pic (info))
10775 /* We only need one non-PIC glink stub. */
10776 break;
10777 }
10778 else
10779 break;
10780 }
10781 return TRUE;
10782 }
10783
10784 /* Finish up PLT handling. */
10785
10786 bfd_boolean
10787 ppc_finish_symbols (struct bfd_link_info *info)
10788 {
10789 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10790 bfd *ibfd;
10791
10792 if (!htab)
10793 return TRUE;
10794
10795 elf_link_hash_traverse (&htab->elf, write_global_sym_plt, info);
10796
10797 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10798 {
10799 bfd_vma *local_got, *end_local_got;
10800 struct plt_entry **local_plt, **lplt, **end_local_plt;
10801 Elf_Internal_Shdr *symtab_hdr;
10802 bfd_size_type locsymcount;
10803 Elf_Internal_Sym *local_syms = NULL;
10804 struct plt_entry *ent;
10805
10806 if (!is_ppc_elf (ibfd))
10807 continue;
10808
10809 local_got = elf_local_got_offsets (ibfd);
10810 if (!local_got)
10811 continue;
10812
10813 symtab_hdr = &elf_symtab_hdr (ibfd);
10814 locsymcount = symtab_hdr->sh_info;
10815 end_local_got = local_got + locsymcount;
10816 local_plt = (struct plt_entry **) end_local_got;
10817 end_local_plt = local_plt + locsymcount;
10818 for (lplt = local_plt; lplt < end_local_plt; ++lplt)
10819 for (ent = *lplt; ent != NULL; ent = ent->next)
10820 {
10821 if (ent->plt.offset != (bfd_vma) -1)
10822 {
10823 Elf_Internal_Sym *sym;
10824 asection *sym_sec;
10825 asection *plt, *relplt;
10826 bfd_byte *loc;
10827 bfd_vma val;
10828 Elf_Internal_Rela rela;
10829
10830 if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms,
10831 lplt - local_plt, ibfd))
10832 {
10833 if (local_syms != NULL
10834 && symtab_hdr->contents != (unsigned char *) local_syms)
10835 free (local_syms);
10836 return FALSE;
10837 }
10838
10839 val = sym->st_value;
10840 if (sym_sec != NULL && sym_sec->output_section != NULL)
10841 val += sym_sec->output_offset + sym_sec->output_section->vma;
10842
10843 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
10844 {
10845 htab->local_ifunc_resolver = 1;
10846 plt = htab->elf.iplt;
10847 relplt = htab->elf.irelplt;
10848 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10849 }
10850 else
10851 {
10852 plt = htab->pltlocal;
10853 if (bfd_link_pic (info))
10854 {
10855 relplt = htab->relpltlocal;
10856 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
10857 }
10858 else
10859 {
10860 loc = plt->contents + ent->plt.offset;
10861 bfd_put_32 (info->output_bfd, val, loc);
10862 continue;
10863 }
10864 }
10865
10866 rela.r_offset = (ent->plt.offset
10867 + plt->output_offset
10868 + plt->output_section->vma);
10869 rela.r_addend = val;
10870 loc = relplt->contents + (relplt->reloc_count++
10871 * sizeof (Elf32_External_Rela));
10872 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10873 }
10874 if ((ent->glink_offset & 1) == 0)
10875 {
10876 unsigned char *p = ((unsigned char *) htab->glink->contents
10877 + ent->glink_offset);
10878
10879 write_glink_stub (NULL, ent, htab->elf.iplt, p, info);
10880 ent->glink_offset |= 1;
10881 }
10882 }
10883
10884 if (local_syms != NULL
10885 && symtab_hdr->contents != (unsigned char *) local_syms)
10886 {
10887 if (!info->keep_memory)
10888 free (local_syms);
10889 else
10890 symtab_hdr->contents = (unsigned char *) local_syms;
10891 }
10892 }
10893 return TRUE;
10894 }
10895
10896 /* Finish up dynamic symbol handling. We set the contents of various
10897 dynamic sections here. */
10898
10899 static bfd_boolean
10900 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10901 struct bfd_link_info *info,
10902 struct elf_link_hash_entry *h,
10903 Elf_Internal_Sym *sym)
10904 {
10905 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10906 struct plt_entry *ent;
10907
10908 #ifdef DEBUG
10909 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10910 h->root.root.string);
10911 #endif
10912
10913 if (!h->def_regular
10914 || (h->type == STT_GNU_IFUNC && !bfd_link_pic (info)))
10915 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10916 if (ent->plt.offset != (bfd_vma) -1)
10917 {
10918 if (!h->def_regular)
10919 {
10920 /* Mark the symbol as undefined, rather than as
10921 defined in the .plt section. Leave the value if
10922 there were any relocations where pointer equality
10923 matters (this is a clue for the dynamic linker, to
10924 make function pointer comparisons work between an
10925 application and shared library), otherwise set it
10926 to zero. */
10927 sym->st_shndx = SHN_UNDEF;
10928 if (!h->pointer_equality_needed)
10929 sym->st_value = 0;
10930 else if (!h->ref_regular_nonweak)
10931 {
10932 /* This breaks function pointer comparisons, but
10933 that is better than breaking tests for a NULL
10934 function pointer. */
10935 sym->st_value = 0;
10936 }
10937 }
10938 else
10939 {
10940 /* Set the value of ifunc symbols in a non-pie
10941 executable to the glink entry. This is to avoid
10942 text relocations. We can't do this for ifunc in
10943 allocate_dynrelocs, as we do for normal dynamic
10944 function symbols with plt entries, because we need
10945 to keep the original value around for the ifunc
10946 relocation. */
10947 sym->st_shndx
10948 = (_bfd_elf_section_from_bfd_section
10949 (info->output_bfd, htab->glink->output_section));
10950 sym->st_value = (ent->glink_offset
10951 + htab->glink->output_offset
10952 + htab->glink->output_section->vma);
10953 }
10954 break;
10955 }
10956
10957 if (h->needs_copy)
10958 {
10959 asection *s;
10960 Elf_Internal_Rela rela;
10961 bfd_byte *loc;
10962
10963 /* This symbols needs a copy reloc. Set it up. */
10964
10965 #ifdef DEBUG
10966 fprintf (stderr, ", copy");
10967 #endif
10968
10969 BFD_ASSERT (h->dynindx != -1);
10970
10971 if (ppc_elf_hash_entry (h)->has_sda_refs)
10972 s = htab->relsbss;
10973 else if (h->root.u.def.section == htab->elf.sdynrelro)
10974 s = htab->elf.sreldynrelro;
10975 else
10976 s = htab->elf.srelbss;
10977 BFD_ASSERT (s != NULL);
10978
10979 rela.r_offset = SYM_VAL (h);
10980 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10981 rela.r_addend = 0;
10982 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10983 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10984 }
10985
10986 #ifdef DEBUG
10987 fprintf (stderr, "\n");
10988 #endif
10989
10990 return TRUE;
10991 }
10992 \f
10993 static enum elf_reloc_type_class
10994 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10995 const asection *rel_sec,
10996 const Elf_Internal_Rela *rela)
10997 {
10998 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10999
11000 if (rel_sec == htab->elf.irelplt)
11001 return reloc_class_ifunc;
11002
11003 switch (ELF32_R_TYPE (rela->r_info))
11004 {
11005 case R_PPC_RELATIVE:
11006 return reloc_class_relative;
11007 case R_PPC_JMP_SLOT:
11008 return reloc_class_plt;
11009 case R_PPC_COPY:
11010 return reloc_class_copy;
11011 default:
11012 return reloc_class_normal;
11013 }
11014 }
11015 \f
11016 /* Finish up the dynamic sections. */
11017
11018 static bfd_boolean
11019 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
11020 struct bfd_link_info *info)
11021 {
11022 asection *sdyn;
11023 struct ppc_elf_link_hash_table *htab;
11024 bfd_vma got;
11025 bfd *dynobj;
11026 bfd_boolean ret = TRUE;
11027
11028 #ifdef DEBUG
11029 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
11030 #endif
11031
11032 htab = ppc_elf_hash_table (info);
11033 dynobj = htab->elf.dynobj;
11034 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
11035
11036 got = 0;
11037 if (htab->elf.hgot != NULL)
11038 got = SYM_VAL (htab->elf.hgot);
11039
11040 if (htab->elf.dynamic_sections_created)
11041 {
11042 Elf32_External_Dyn *dyncon, *dynconend;
11043
11044 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
11045
11046 dyncon = (Elf32_External_Dyn *) sdyn->contents;
11047 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
11048 for (; dyncon < dynconend; dyncon++)
11049 {
11050 Elf_Internal_Dyn dyn;
11051 asection *s;
11052
11053 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
11054
11055 switch (dyn.d_tag)
11056 {
11057 case DT_PLTGOT:
11058 if (htab->is_vxworks)
11059 s = htab->elf.sgotplt;
11060 else
11061 s = htab->elf.splt;
11062 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11063 break;
11064
11065 case DT_PLTRELSZ:
11066 dyn.d_un.d_val = htab->elf.srelplt->size;
11067 break;
11068
11069 case DT_JMPREL:
11070 s = htab->elf.srelplt;
11071 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11072 break;
11073
11074 case DT_PPC_GOT:
11075 dyn.d_un.d_ptr = got;
11076 break;
11077
11078 case DT_TEXTREL:
11079 if (htab->local_ifunc_resolver)
11080 info->callbacks->einfo
11081 (_("%X%P: text relocations and GNU indirect "
11082 "functions will result in a segfault at runtime\n"));
11083 else if (htab->maybe_local_ifunc_resolver)
11084 info->callbacks->einfo
11085 (_("%P: warning: text relocations and GNU indirect "
11086 "functions may result in a segfault at runtime\n"));
11087 continue;
11088
11089 default:
11090 if (htab->is_vxworks
11091 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
11092 break;
11093 continue;
11094 }
11095
11096 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
11097 }
11098 }
11099
11100 if (htab->elf.sgot != NULL
11101 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
11102 {
11103 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
11104 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
11105 {
11106 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
11107
11108 p += htab->elf.hgot->root.u.def.value;
11109 if (htab->plt_type == PLT_OLD)
11110 {
11111 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
11112 so that a function can easily find the address of
11113 _GLOBAL_OFFSET_TABLE_. */
11114 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
11115 < htab->elf.hgot->root.u.def.section->size);
11116 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
11117 }
11118
11119 if (sdyn != NULL)
11120 {
11121 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
11122 BFD_ASSERT (htab->elf.hgot->root.u.def.value
11123 < htab->elf.hgot->root.u.def.section->size);
11124 bfd_put_32 (output_bfd, val, p);
11125 }
11126 }
11127 else
11128 {
11129 /* xgettext:c-format */
11130 _bfd_error_handler (_("%s not defined in linker created %pA"),
11131 htab->elf.hgot->root.root.string,
11132 (htab->elf.sgotplt != NULL
11133 ? htab->elf.sgotplt : htab->elf.sgot));
11134 bfd_set_error (bfd_error_bad_value);
11135 ret = FALSE;
11136 }
11137
11138 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
11139 }
11140
11141 /* Fill in the first entry in the VxWorks procedure linkage table. */
11142 if (htab->is_vxworks
11143 && htab->elf.splt != NULL
11144 && htab->elf.splt->size != 0
11145 && htab->elf.splt->output_section != bfd_abs_section_ptr)
11146 {
11147 asection *splt = htab->elf.splt;
11148 /* Use the right PLT. */
11149 const bfd_vma *plt_entry = (bfd_link_pic (info)
11150 ? ppc_elf_vxworks_pic_plt0_entry
11151 : ppc_elf_vxworks_plt0_entry);
11152
11153 if (!bfd_link_pic (info))
11154 {
11155 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
11156
11157 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
11158 splt->contents + 0);
11159 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
11160 splt->contents + 4);
11161 }
11162 else
11163 {
11164 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
11165 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
11166 }
11167 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
11168 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
11169 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
11170 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
11171 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
11172 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
11173
11174 if (! bfd_link_pic (info))
11175 {
11176 Elf_Internal_Rela rela;
11177 bfd_byte *loc;
11178
11179 loc = htab->srelplt2->contents;
11180
11181 /* Output the @ha relocation for the first instruction. */
11182 rela.r_offset = (htab->elf.splt->output_section->vma
11183 + htab->elf.splt->output_offset
11184 + 2);
11185 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
11186 rela.r_addend = 0;
11187 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11188 loc += sizeof (Elf32_External_Rela);
11189
11190 /* Output the @l relocation for the second instruction. */
11191 rela.r_offset = (htab->elf.splt->output_section->vma
11192 + htab->elf.splt->output_offset
11193 + 6);
11194 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
11195 rela.r_addend = 0;
11196 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11197 loc += sizeof (Elf32_External_Rela);
11198
11199 /* Fix up the remaining relocations. They may have the wrong
11200 symbol index for _G_O_T_ or _P_L_T_ depending on the order
11201 in which symbols were output. */
11202 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
11203 {
11204 Elf_Internal_Rela rel;
11205
11206 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11207 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
11208 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11209 loc += sizeof (Elf32_External_Rela);
11210
11211 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11212 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
11213 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11214 loc += sizeof (Elf32_External_Rela);
11215
11216 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11217 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
11218 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11219 loc += sizeof (Elf32_External_Rela);
11220 }
11221 }
11222 }
11223
11224 if (htab->glink != NULL
11225 && htab->glink->contents != NULL
11226 && htab->elf.dynamic_sections_created)
11227 {
11228 unsigned char *p;
11229 unsigned char *endp;
11230 bfd_vma res0;
11231
11232 /*
11233 * PIC glink code is the following:
11234 *
11235 * # ith PLT code stub.
11236 * addis 11,30,(plt+(i-1)*4-got)@ha
11237 * lwz 11,(plt+(i-1)*4-got)@l(11)
11238 * mtctr 11
11239 * bctr
11240 *
11241 * # A table of branches, one for each plt entry.
11242 * # The idea is that the plt call stub loads ctr and r11 with these
11243 * # addresses, so (r11 - res_0) gives the plt index * 4.
11244 * res_0: b PLTresolve
11245 * res_1: b PLTresolve
11246 * .
11247 * # Some number of entries towards the end can be nops
11248 * res_n_m3: nop
11249 * res_n_m2: nop
11250 * res_n_m1:
11251 *
11252 * PLTresolve:
11253 * addis 11,11,(1f-res_0)@ha
11254 * mflr 0
11255 * bcl 20,31,1f
11256 * 1: addi 11,11,(1b-res_0)@l
11257 * mflr 12
11258 * mtlr 0
11259 * sub 11,11,12 # r11 = index * 4
11260 * addis 12,12,(got+4-1b)@ha
11261 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
11262 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
11263 * mtctr 0
11264 * add 0,11,11
11265 * add 11,0,11 # r11 = index * 12 = reloc offset.
11266 * bctr
11267 *
11268 * Non-PIC glink code is a little simpler.
11269 *
11270 * # ith PLT code stub.
11271 * lis 11,(plt+(i-1)*4)@ha
11272 * lwz 11,(plt+(i-1)*4)@l(11)
11273 * mtctr 11
11274 * bctr
11275 *
11276 * The branch table is the same, then comes
11277 *
11278 * PLTresolve:
11279 * lis 12,(got+4)@ha
11280 * addis 11,11,(-res_0)@ha
11281 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
11282 * addi 11,11,(-res_0)@l # r11 = index * 4
11283 * mtctr 0
11284 * add 0,11,11
11285 * lwz 12,(got+8)@l(12) # got[2] contains the map address
11286 * add 11,0,11 # r11 = index * 12 = reloc offset.
11287 * bctr
11288 */
11289
11290 /* Build the branch table, one for each plt entry (less one),
11291 and perhaps some padding. */
11292 p = htab->glink->contents;
11293 p += htab->glink_pltresolve;
11294 endp = htab->glink->contents;
11295 endp += htab->glink->size - GLINK_PLTRESOLVE;
11296 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
11297 {
11298 bfd_put_32 (output_bfd, B + endp - p, p);
11299 p += 4;
11300 }
11301 while (p < endp)
11302 {
11303 bfd_put_32 (output_bfd, NOP, p);
11304 p += 4;
11305 }
11306
11307 res0 = (htab->glink_pltresolve
11308 + htab->glink->output_section->vma
11309 + htab->glink->output_offset);
11310
11311 if (htab->params->ppc476_workaround)
11312 {
11313 /* Ensure that a call stub at the end of a page doesn't
11314 result in prefetch over the end of the page into the
11315 glink branch table. */
11316 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
11317 bfd_vma page_addr;
11318 bfd_vma glink_start = (htab->glink->output_section->vma
11319 + htab->glink->output_offset);
11320
11321 for (page_addr = res0 & -pagesize;
11322 page_addr > glink_start;
11323 page_addr -= pagesize)
11324 {
11325 /* We have a plt call stub that may need fixing. */
11326 bfd_byte *loc;
11327 unsigned int insn;
11328
11329 loc = htab->glink->contents + page_addr - 4 - glink_start;
11330 insn = bfd_get_32 (output_bfd, loc);
11331 if (insn == BCTR)
11332 {
11333 /* By alignment, we know that there must be at least
11334 one other call stub before this one. */
11335 insn = bfd_get_32 (output_bfd, loc - 16);
11336 if (insn == BCTR)
11337 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
11338 else
11339 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
11340 }
11341 }
11342 }
11343
11344 /* Last comes the PLTresolve stub. */
11345 endp = p + GLINK_PLTRESOLVE;
11346 if (bfd_link_pic (info))
11347 {
11348 bfd_vma bcl;
11349
11350 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
11351 + htab->glink->output_section->vma
11352 + htab->glink->output_offset);
11353
11354 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (bcl - res0), p);
11355 p += 4;
11356 bfd_put_32 (output_bfd, MFLR_0, p);
11357 p += 4;
11358 bfd_put_32 (output_bfd, BCL_20_31, p);
11359 p += 4;
11360 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (bcl - res0), p);
11361 p += 4;
11362 bfd_put_32 (output_bfd, MFLR_12, p);
11363 p += 4;
11364 bfd_put_32 (output_bfd, MTLR_0, p);
11365 p += 4;
11366 bfd_put_32 (output_bfd, SUB_11_11_12, p);
11367 p += 4;
11368 bfd_put_32 (output_bfd, ADDIS_12_12 + PPC_HA (got + 4 - bcl), p);
11369 p += 4;
11370 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
11371 {
11372 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4 - bcl), p);
11373 p += 4;
11374 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8 - bcl), p);
11375 p += 4;
11376 }
11377 else
11378 {
11379 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4 - bcl), p);
11380 p += 4;
11381 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
11382 p += 4;
11383 }
11384 bfd_put_32 (output_bfd, MTCTR_0, p);
11385 p += 4;
11386 bfd_put_32 (output_bfd, ADD_0_11_11, p);
11387 }
11388 else
11389 {
11390 bfd_put_32 (output_bfd, LIS_12 + PPC_HA (got + 4), p);
11391 p += 4;
11392 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (-res0), p);
11393 p += 4;
11394 if (PPC_HA (got + 4) == PPC_HA (got + 8))
11395 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4), p);
11396 else
11397 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4), p);
11398 p += 4;
11399 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (-res0), p);
11400 p += 4;
11401 bfd_put_32 (output_bfd, MTCTR_0, p);
11402 p += 4;
11403 bfd_put_32 (output_bfd, ADD_0_11_11, p);
11404 p += 4;
11405 if (PPC_HA (got + 4) == PPC_HA (got + 8))
11406 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8), p);
11407 else
11408 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
11409 }
11410 p += 4;
11411 bfd_put_32 (output_bfd, ADD_11_0_11, p);
11412 p += 4;
11413 bfd_put_32 (output_bfd, BCTR, p);
11414 p += 4;
11415 while (p < endp)
11416 {
11417 bfd_put_32 (output_bfd,
11418 htab->params->ppc476_workaround ? BA : NOP, p);
11419 p += 4;
11420 }
11421 BFD_ASSERT (p == endp);
11422 }
11423
11424 if (htab->glink_eh_frame != NULL
11425 && htab->glink_eh_frame->contents != NULL)
11426 {
11427 unsigned char *p = htab->glink_eh_frame->contents;
11428 bfd_vma val;
11429
11430 p += sizeof (glink_eh_frame_cie);
11431 /* FDE length. */
11432 p += 4;
11433 /* CIE pointer. */
11434 p += 4;
11435 /* Offset to .glink. */
11436 val = (htab->glink->output_section->vma
11437 + htab->glink->output_offset);
11438 val -= (htab->glink_eh_frame->output_section->vma
11439 + htab->glink_eh_frame->output_offset);
11440 val -= p - htab->glink_eh_frame->contents;
11441 bfd_put_32 (htab->elf.dynobj, val, p);
11442
11443 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
11444 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
11445 htab->glink_eh_frame,
11446 htab->glink_eh_frame->contents))
11447 return FALSE;
11448 }
11449
11450 return ret;
11451 }
11452 \f
11453 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
11454 #define TARGET_LITTLE_NAME "elf32-powerpcle"
11455 #define TARGET_BIG_SYM powerpc_elf32_vec
11456 #define TARGET_BIG_NAME "elf32-powerpc"
11457 #define ELF_ARCH bfd_arch_powerpc
11458 #define ELF_TARGET_ID PPC32_ELF_DATA
11459 #define ELF_MACHINE_CODE EM_PPC
11460 #define ELF_MAXPAGESIZE 0x10000
11461 #define ELF_COMMONPAGESIZE 0x1000
11462 #define ELF_RELROPAGESIZE ELF_MAXPAGESIZE
11463 #define elf_info_to_howto ppc_elf_info_to_howto
11464
11465 #ifdef EM_CYGNUS_POWERPC
11466 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
11467 #endif
11468
11469 #ifdef EM_PPC_OLD
11470 #define ELF_MACHINE_ALT2 EM_PPC_OLD
11471 #endif
11472
11473 #define elf_backend_plt_not_loaded 1
11474 #define elf_backend_want_dynrelro 1
11475 #define elf_backend_can_gc_sections 1
11476 #define elf_backend_can_refcount 1
11477 #define elf_backend_rela_normal 1
11478 #define elf_backend_caches_rawsize 1
11479
11480 #define bfd_elf32_mkobject ppc_elf_mkobject
11481 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
11482 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
11483 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
11484 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
11485 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
11486 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
11487 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
11488
11489 #define elf_backend_object_p ppc_elf_object_p
11490 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
11491 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
11492 #define elf_backend_relocate_section ppc_elf_relocate_section
11493 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
11494 #define elf_backend_check_relocs ppc_elf_check_relocs
11495 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
11496 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
11497 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
11498 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
11499 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
11500 #define elf_backend_hash_symbol ppc_elf_hash_symbol
11501 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
11502 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
11503 #define elf_backend_fake_sections ppc_elf_fake_sections
11504 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
11505 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
11506 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
11507 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
11508 #define elf_backend_write_core_note ppc_elf_write_core_note
11509 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
11510 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
11511 #define elf_backend_final_write_processing ppc_elf_final_write_processing
11512 #define elf_backend_write_section ppc_elf_write_section
11513 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
11514 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
11515 #define elf_backend_action_discarded ppc_elf_action_discarded
11516 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
11517 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
11518
11519 #include "elf32-target.h"
11520
11521 /* FreeBSD Target */
11522
11523 #undef TARGET_LITTLE_SYM
11524 #undef TARGET_LITTLE_NAME
11525
11526 #undef TARGET_BIG_SYM
11527 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
11528 #undef TARGET_BIG_NAME
11529 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
11530
11531 #undef ELF_OSABI
11532 #define ELF_OSABI ELFOSABI_FREEBSD
11533
11534 #undef elf32_bed
11535 #define elf32_bed elf32_powerpc_fbsd_bed
11536
11537 #include "elf32-target.h"
11538
11539 /* VxWorks Target */
11540
11541 #undef TARGET_LITTLE_SYM
11542 #undef TARGET_LITTLE_NAME
11543
11544 #undef TARGET_BIG_SYM
11545 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
11546 #undef TARGET_BIG_NAME
11547 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
11548
11549 #undef ELF_OSABI
11550
11551 /* VxWorks uses the elf default section flags for .plt. */
11552 static const struct bfd_elf_special_section *
11553 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
11554 {
11555 if (sec->name == NULL)
11556 return NULL;
11557
11558 if (strcmp (sec->name, ".plt") == 0)
11559 return _bfd_elf_get_sec_type_attr (abfd, sec);
11560
11561 return ppc_elf_get_sec_type_attr (abfd, sec);
11562 }
11563
11564 /* Like ppc_elf_link_hash_table_create, but overrides
11565 appropriately for VxWorks. */
11566 static struct bfd_link_hash_table *
11567 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11568 {
11569 struct bfd_link_hash_table *ret;
11570
11571 ret = ppc_elf_link_hash_table_create (abfd);
11572 if (ret)
11573 {
11574 struct ppc_elf_link_hash_table *htab
11575 = (struct ppc_elf_link_hash_table *)ret;
11576 htab->is_vxworks = 1;
11577 htab->plt_type = PLT_VXWORKS;
11578 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11579 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11580 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11581 }
11582 return ret;
11583 }
11584
11585 /* Tweak magic VxWorks symbols as they are loaded. */
11586 static bfd_boolean
11587 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11588 struct bfd_link_info *info,
11589 Elf_Internal_Sym *sym,
11590 const char **namep,
11591 flagword *flagsp,
11592 asection **secp,
11593 bfd_vma *valp)
11594 {
11595 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
11596 valp))
11597 return FALSE;
11598
11599 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
11600 }
11601
11602 static void
11603 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11604 {
11605 ppc_elf_final_write_processing (abfd, linker);
11606 elf_vxworks_final_write_processing (abfd, linker);
11607 }
11608
11609 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11610 define it. */
11611 #undef elf_backend_want_plt_sym
11612 #define elf_backend_want_plt_sym 1
11613 #undef elf_backend_want_got_plt
11614 #define elf_backend_want_got_plt 1
11615 #undef elf_backend_got_symbol_offset
11616 #define elf_backend_got_symbol_offset 0
11617 #undef elf_backend_plt_not_loaded
11618 #define elf_backend_plt_not_loaded 0
11619 #undef elf_backend_plt_readonly
11620 #define elf_backend_plt_readonly 1
11621 #undef elf_backend_got_header_size
11622 #define elf_backend_got_header_size 12
11623 #undef elf_backend_dtrel_excludes_plt
11624 #define elf_backend_dtrel_excludes_plt 1
11625
11626 #undef bfd_elf32_get_synthetic_symtab
11627
11628 #undef bfd_elf32_bfd_link_hash_table_create
11629 #define bfd_elf32_bfd_link_hash_table_create \
11630 ppc_elf_vxworks_link_hash_table_create
11631 #undef elf_backend_add_symbol_hook
11632 #define elf_backend_add_symbol_hook \
11633 ppc_elf_vxworks_add_symbol_hook
11634 #undef elf_backend_link_output_symbol_hook
11635 #define elf_backend_link_output_symbol_hook \
11636 elf_vxworks_link_output_symbol_hook
11637 #undef elf_backend_final_write_processing
11638 #define elf_backend_final_write_processing \
11639 ppc_elf_vxworks_final_write_processing
11640 #undef elf_backend_get_sec_type_attr
11641 #define elf_backend_get_sec_type_attr \
11642 ppc_elf_vxworks_get_sec_type_attr
11643 #undef elf_backend_emit_relocs
11644 #define elf_backend_emit_relocs \
11645 elf_vxworks_emit_relocs
11646
11647 #undef elf32_bed
11648 #define elf32_bed ppc_elf_vxworks_bed
11649 #undef elf_backend_post_process_headers
11650
11651 #include "elf32-target.h"