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[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2018 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE(htab, h) \
72 ((4*4 \
73 + (h != NULL \
74 && h == htab->tls_get_addr \
75 && !htab->params->no_tls_get_addr_opt ? 8*4 : 0) \
76 + (1u << htab->params->plt_stub_align) - 1) \
77 & -(1u << htab->params->plt_stub_align))
78
79 /* VxWorks uses its own plt layout, filled in by the static linker. */
80
81 /* The standard VxWorks PLT entry. */
82 #define VXWORKS_PLT_ENTRY_SIZE 32
83 static const bfd_vma ppc_elf_vxworks_plt_entry
84 [VXWORKS_PLT_ENTRY_SIZE / 4] =
85 {
86 0x3d800000, /* lis r12,0 */
87 0x818c0000, /* lwz r12,0(r12) */
88 0x7d8903a6, /* mtctr r12 */
89 0x4e800420, /* bctr */
90 0x39600000, /* li r11,0 */
91 0x48000000, /* b 14 <.PLT0resolve+0x4> */
92 0x60000000, /* nop */
93 0x60000000, /* nop */
94 };
95 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
96 [VXWORKS_PLT_ENTRY_SIZE / 4] =
97 {
98 0x3d9e0000, /* addis r12,r30,0 */
99 0x818c0000, /* lwz r12,0(r12) */
100 0x7d8903a6, /* mtctr r12 */
101 0x4e800420, /* bctr */
102 0x39600000, /* li r11,0 */
103 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
104 0x60000000, /* nop */
105 0x60000000, /* nop */
106 };
107
108 /* The initial VxWorks PLT entry. */
109 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
110 static const bfd_vma ppc_elf_vxworks_plt0_entry
111 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
112 {
113 0x3d800000, /* lis r12,0 */
114 0x398c0000, /* addi r12,r12,0 */
115 0x800c0008, /* lwz r0,8(r12) */
116 0x7c0903a6, /* mtctr r0 */
117 0x818c0004, /* lwz r12,4(r12) */
118 0x4e800420, /* bctr */
119 0x60000000, /* nop */
120 0x60000000, /* nop */
121 };
122 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
123 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
124 {
125 0x819e0008, /* lwz r12,8(r30) */
126 0x7d8903a6, /* mtctr r12 */
127 0x819e0004, /* lwz r12,4(r30) */
128 0x4e800420, /* bctr */
129 0x60000000, /* nop */
130 0x60000000, /* nop */
131 0x60000000, /* nop */
132 0x60000000, /* nop */
133 };
134
135 /* For executables, we have some additional relocations in
136 .rela.plt.unloaded, for the kernel loader. */
137
138 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
139 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
140 /* The number of relocations in the PLTResolve slot. */
141 #define VXWORKS_PLTRESOLVE_RELOCS 2
142 /* The number of relocations in the PLTResolve slot when creating
143 a shared library. */
144 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
145
146 /* Some instructions. */
147 #define ADDIS_11_11 0x3d6b0000
148 #define ADDIS_11_30 0x3d7e0000
149 #define ADDIS_12_12 0x3d8c0000
150 #define ADDI_11_11 0x396b0000
151 #define ADD_0_11_11 0x7c0b5a14
152 #define ADD_3_12_2 0x7c6c1214
153 #define ADD_11_0_11 0x7d605a14
154 #define B 0x48000000
155 #define BA 0x48000002
156 #define BCL_20_31 0x429f0005
157 #define BCTR 0x4e800420
158 #define BEQLR 0x4d820020
159 #define CMPWI_11_0 0x2c0b0000
160 #define LIS_11 0x3d600000
161 #define LIS_12 0x3d800000
162 #define LWZU_0_12 0x840c0000
163 #define LWZ_0_12 0x800c0000
164 #define LWZ_11_3 0x81630000
165 #define LWZ_11_11 0x816b0000
166 #define LWZ_11_30 0x817e0000
167 #define LWZ_12_3 0x81830000
168 #define LWZ_12_12 0x818c0000
169 #define MR_0_3 0x7c601b78
170 #define MR_3_0 0x7c030378
171 #define MFLR_0 0x7c0802a6
172 #define MFLR_12 0x7d8802a6
173 #define MTCTR_0 0x7c0903a6
174 #define MTCTR_11 0x7d6903a6
175 #define MTLR_0 0x7c0803a6
176 #define NOP 0x60000000
177 #define SUB_11_11_12 0x7d6c5850
178
179 /* Offset of tp and dtp pointers from start of TLS block. */
180 #define TP_OFFSET 0x7000
181 #define DTP_OFFSET 0x8000
182
183 /* The value of a defined global symbol. */
184 #define SYM_VAL(SYM) \
185 ((SYM)->root.u.def.section->output_section->vma \
186 + (SYM)->root.u.def.section->output_offset \
187 + (SYM)->root.u.def.value)
188 \f
189 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
190
191 static reloc_howto_type ppc_elf_howto_raw[] = {
192 /* This reloc does nothing. */
193 HOWTO (R_PPC_NONE, /* type */
194 0, /* rightshift */
195 3, /* size (0 = byte, 1 = short, 2 = long) */
196 0, /* bitsize */
197 FALSE, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_dont, /* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_PPC_NONE", /* name */
202 FALSE, /* partial_inplace */
203 0, /* src_mask */
204 0, /* dst_mask */
205 FALSE), /* pcrel_offset */
206
207 /* A standard 32 bit relocation. */
208 HOWTO (R_PPC_ADDR32, /* type */
209 0, /* rightshift */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
211 32, /* bitsize */
212 FALSE, /* pc_relative */
213 0, /* bitpos */
214 complain_overflow_dont, /* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_PPC_ADDR32", /* name */
217 FALSE, /* partial_inplace */
218 0, /* src_mask */
219 0xffffffff, /* dst_mask */
220 FALSE), /* pcrel_offset */
221
222 /* An absolute 26 bit branch; the lower two bits must be zero.
223 FIXME: we don't check that, we just clear them. */
224 HOWTO (R_PPC_ADDR24, /* type */
225 0, /* rightshift */
226 2, /* size (0 = byte, 1 = short, 2 = long) */
227 26, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_signed, /* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR24", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0x3fffffc, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* A standard 16 bit relocation. */
239 HOWTO (R_PPC_ADDR16, /* type */
240 0, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_bitfield, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* A 16 bit relocation without overflow. */
254 HOWTO (R_PPC_ADDR16_LO, /* type */
255 0, /* rightshift */
256 1, /* size (0 = byte, 1 = short, 2 = long) */
257 16, /* bitsize */
258 FALSE, /* pc_relative */
259 0, /* bitpos */
260 complain_overflow_dont,/* complain_on_overflow */
261 bfd_elf_generic_reloc, /* special_function */
262 "R_PPC_ADDR16_LO", /* name */
263 FALSE, /* partial_inplace */
264 0, /* src_mask */
265 0xffff, /* dst_mask */
266 FALSE), /* pcrel_offset */
267
268 /* The high order 16 bits of an address. */
269 HOWTO (R_PPC_ADDR16_HI, /* type */
270 16, /* rightshift */
271 1, /* size (0 = byte, 1 = short, 2 = long) */
272 16, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC_ADDR16_HI", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0xffff, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* The high order 16 bits of an address, plus 1 if the contents of
284 the low 16 bits, treated as a signed number, is negative. */
285 HOWTO (R_PPC_ADDR16_HA, /* type */
286 16, /* rightshift */
287 1, /* size (0 = byte, 1 = short, 2 = long) */
288 16, /* bitsize */
289 FALSE, /* pc_relative */
290 0, /* bitpos */
291 complain_overflow_dont, /* complain_on_overflow */
292 ppc_elf_addr16_ha_reloc, /* special_function */
293 "R_PPC_ADDR16_HA", /* name */
294 FALSE, /* partial_inplace */
295 0, /* src_mask */
296 0xffff, /* dst_mask */
297 FALSE), /* pcrel_offset */
298
299 /* An absolute 16 bit branch; the lower two bits must be zero.
300 FIXME: we don't check that, we just clear them. */
301 HOWTO (R_PPC_ADDR14, /* type */
302 0, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 0, /* bitpos */
307 complain_overflow_signed, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_PPC_ADDR14", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0xfffc, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* An absolute 16 bit branch, for which bit 10 should be set to
316 indicate that the branch is expected to be taken. The lower two
317 bits must be zero. */
318 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
319 0, /* rightshift */
320 2, /* size (0 = byte, 1 = short, 2 = long) */
321 16, /* bitsize */
322 FALSE, /* pc_relative */
323 0, /* bitpos */
324 complain_overflow_signed, /* complain_on_overflow */
325 bfd_elf_generic_reloc, /* special_function */
326 "R_PPC_ADDR14_BRTAKEN",/* name */
327 FALSE, /* partial_inplace */
328 0, /* src_mask */
329 0xfffc, /* dst_mask */
330 FALSE), /* pcrel_offset */
331
332 /* An absolute 16 bit branch, for which bit 10 should be set to
333 indicate that the branch is not expected to be taken. The lower
334 two bits must be zero. */
335 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_ADDR14_BRNTAKEN",/* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* A relative 26 bit branch; the lower two bits must be zero. */
350 HOWTO (R_PPC_REL24, /* type */
351 0, /* rightshift */
352 2, /* size (0 = byte, 1 = short, 2 = long) */
353 26, /* bitsize */
354 TRUE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC_REL24", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0x3fffffc, /* dst_mask */
362 TRUE), /* pcrel_offset */
363
364 /* A relative 16 bit branch; the lower two bits must be zero. */
365 HOWTO (R_PPC_REL14, /* type */
366 0, /* rightshift */
367 2, /* size (0 = byte, 1 = short, 2 = long) */
368 16, /* bitsize */
369 TRUE, /* pc_relative */
370 0, /* bitpos */
371 complain_overflow_signed, /* complain_on_overflow */
372 bfd_elf_generic_reloc, /* special_function */
373 "R_PPC_REL14", /* name */
374 FALSE, /* partial_inplace */
375 0, /* src_mask */
376 0xfffc, /* dst_mask */
377 TRUE), /* pcrel_offset */
378
379 /* A relative 16 bit branch. Bit 10 should be set to indicate that
380 the branch is expected to be taken. The lower two bits must be
381 zero. */
382 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 TRUE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_PPC_REL14_BRTAKEN", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0xfffc, /* dst_mask */
394 TRUE), /* pcrel_offset */
395
396 /* A relative 16 bit branch. Bit 10 should be set to indicate that
397 the branch is not expected to be taken. The lower two bits must
398 be zero. */
399 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 TRUE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 bfd_elf_generic_reloc, /* special_function */
407 "R_PPC_REL14_BRNTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0xfffc, /* dst_mask */
411 TRUE), /* pcrel_offset */
412
413 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
414 symbol. */
415 HOWTO (R_PPC_GOT16, /* type */
416 0, /* rightshift */
417 1, /* size (0 = byte, 1 = short, 2 = long) */
418 16, /* bitsize */
419 FALSE, /* pc_relative */
420 0, /* bitpos */
421 complain_overflow_signed, /* complain_on_overflow */
422 ppc_elf_unhandled_reloc, /* special_function */
423 "R_PPC_GOT16", /* name */
424 FALSE, /* partial_inplace */
425 0, /* src_mask */
426 0xffff, /* dst_mask */
427 FALSE), /* pcrel_offset */
428
429 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
430 the symbol. */
431 HOWTO (R_PPC_GOT16_LO, /* type */
432 0, /* rightshift */
433 1, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 FALSE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_dont, /* complain_on_overflow */
438 ppc_elf_unhandled_reloc, /* special_function */
439 "R_PPC_GOT16_LO", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0xffff, /* dst_mask */
443 FALSE), /* pcrel_offset */
444
445 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
446 the symbol. */
447 HOWTO (R_PPC_GOT16_HI, /* type */
448 16, /* rightshift */
449 1, /* size (0 = byte, 1 = short, 2 = long) */
450 16, /* bitsize */
451 FALSE, /* pc_relative */
452 0, /* bitpos */
453 complain_overflow_dont, /* complain_on_overflow */
454 ppc_elf_unhandled_reloc, /* special_function */
455 "R_PPC_GOT16_HI", /* name */
456 FALSE, /* partial_inplace */
457 0, /* src_mask */
458 0xffff, /* dst_mask */
459 FALSE), /* pcrel_offset */
460
461 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
462 the symbol. */
463 HOWTO (R_PPC_GOT16_HA, /* type */
464 16, /* rightshift */
465 1, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 FALSE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_dont, /* complain_on_overflow */
470 ppc_elf_unhandled_reloc, /* special_function */
471 "R_PPC_GOT16_HA", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0xffff, /* dst_mask */
475 FALSE), /* pcrel_offset */
476
477 /* Like R_PPC_REL24, but referring to the procedure linkage table
478 entry for the symbol. */
479 HOWTO (R_PPC_PLTREL24, /* type */
480 0, /* rightshift */
481 2, /* size (0 = byte, 1 = short, 2 = long) */
482 26, /* bitsize */
483 TRUE, /* pc_relative */
484 0, /* bitpos */
485 complain_overflow_signed, /* complain_on_overflow */
486 ppc_elf_unhandled_reloc, /* special_function */
487 "R_PPC_PLTREL24", /* name */
488 FALSE, /* partial_inplace */
489 0, /* src_mask */
490 0x3fffffc, /* dst_mask */
491 TRUE), /* pcrel_offset */
492
493 /* This is used only by the dynamic linker. The symbol should exist
494 both in the object being run and in some shared library. The
495 dynamic linker copies the data addressed by the symbol from the
496 shared library into the object, because the object being
497 run has to have the data at some particular address. */
498 HOWTO (R_PPC_COPY, /* type */
499 0, /* rightshift */
500 2, /* size (0 = byte, 1 = short, 2 = long) */
501 32, /* bitsize */
502 FALSE, /* pc_relative */
503 0, /* bitpos */
504 complain_overflow_dont, /* complain_on_overflow */
505 ppc_elf_unhandled_reloc, /* special_function */
506 "R_PPC_COPY", /* name */
507 FALSE, /* partial_inplace */
508 0, /* src_mask */
509 0, /* dst_mask */
510 FALSE), /* pcrel_offset */
511
512 /* Like R_PPC_ADDR32, but used when setting global offset table
513 entries. */
514 HOWTO (R_PPC_GLOB_DAT, /* type */
515 0, /* rightshift */
516 2, /* size (0 = byte, 1 = short, 2 = long) */
517 32, /* bitsize */
518 FALSE, /* pc_relative */
519 0, /* bitpos */
520 complain_overflow_dont, /* complain_on_overflow */
521 ppc_elf_unhandled_reloc, /* special_function */
522 "R_PPC_GLOB_DAT", /* name */
523 FALSE, /* partial_inplace */
524 0, /* src_mask */
525 0xffffffff, /* dst_mask */
526 FALSE), /* pcrel_offset */
527
528 /* Marks a procedure linkage table entry for a symbol. */
529 HOWTO (R_PPC_JMP_SLOT, /* type */
530 0, /* rightshift */
531 2, /* size (0 = byte, 1 = short, 2 = long) */
532 32, /* bitsize */
533 FALSE, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_dont, /* complain_on_overflow */
536 ppc_elf_unhandled_reloc, /* special_function */
537 "R_PPC_JMP_SLOT", /* name */
538 FALSE, /* partial_inplace */
539 0, /* src_mask */
540 0, /* dst_mask */
541 FALSE), /* pcrel_offset */
542
543 /* Used only by the dynamic linker. When the object is run, this
544 longword is set to the load address of the object, plus the
545 addend. */
546 HOWTO (R_PPC_RELATIVE, /* type */
547 0, /* rightshift */
548 2, /* size (0 = byte, 1 = short, 2 = long) */
549 32, /* bitsize */
550 FALSE, /* pc_relative */
551 0, /* bitpos */
552 complain_overflow_dont, /* complain_on_overflow */
553 bfd_elf_generic_reloc, /* special_function */
554 "R_PPC_RELATIVE", /* name */
555 FALSE, /* partial_inplace */
556 0, /* src_mask */
557 0xffffffff, /* dst_mask */
558 FALSE), /* pcrel_offset */
559
560 /* Like R_PPC_REL24, but uses the value of the symbol within the
561 object rather than the final value. Normally used for
562 _GLOBAL_OFFSET_TABLE_. */
563 HOWTO (R_PPC_LOCAL24PC, /* type */
564 0, /* rightshift */
565 2, /* size (0 = byte, 1 = short, 2 = long) */
566 26, /* bitsize */
567 TRUE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_signed, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_LOCAL24PC", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0x3fffffc, /* dst_mask */
575 TRUE), /* pcrel_offset */
576
577 /* Like R_PPC_ADDR32, but may be unaligned. */
578 HOWTO (R_PPC_UADDR32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 FALSE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_dont, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_UADDR32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 FALSE), /* pcrel_offset */
591
592 /* Like R_PPC_ADDR16, but may be unaligned. */
593 HOWTO (R_PPC_UADDR16, /* type */
594 0, /* rightshift */
595 1, /* size (0 = byte, 1 = short, 2 = long) */
596 16, /* bitsize */
597 FALSE, /* pc_relative */
598 0, /* bitpos */
599 complain_overflow_bitfield, /* complain_on_overflow */
600 bfd_elf_generic_reloc, /* special_function */
601 "R_PPC_UADDR16", /* name */
602 FALSE, /* partial_inplace */
603 0, /* src_mask */
604 0xffff, /* dst_mask */
605 FALSE), /* pcrel_offset */
606
607 /* 32-bit PC relative */
608 HOWTO (R_PPC_REL32, /* type */
609 0, /* rightshift */
610 2, /* size (0 = byte, 1 = short, 2 = long) */
611 32, /* bitsize */
612 TRUE, /* pc_relative */
613 0, /* bitpos */
614 complain_overflow_dont, /* complain_on_overflow */
615 bfd_elf_generic_reloc, /* special_function */
616 "R_PPC_REL32", /* name */
617 FALSE, /* partial_inplace */
618 0, /* src_mask */
619 0xffffffff, /* dst_mask */
620 TRUE), /* pcrel_offset */
621
622 /* 32-bit relocation to the symbol's procedure linkage table.
623 FIXME: not supported. */
624 HOWTO (R_PPC_PLT32, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_dont, /* complain_on_overflow */
631 ppc_elf_unhandled_reloc, /* special_function */
632 "R_PPC_PLT32", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
639 FIXME: not supported. */
640 HOWTO (R_PPC_PLTREL32, /* type */
641 0, /* rightshift */
642 2, /* size (0 = byte, 1 = short, 2 = long) */
643 32, /* bitsize */
644 TRUE, /* pc_relative */
645 0, /* bitpos */
646 complain_overflow_dont, /* complain_on_overflow */
647 ppc_elf_unhandled_reloc, /* special_function */
648 "R_PPC_PLTREL32", /* name */
649 FALSE, /* partial_inplace */
650 0, /* src_mask */
651 0, /* dst_mask */
652 TRUE), /* pcrel_offset */
653
654 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
655 the symbol. */
656 HOWTO (R_PPC_PLT16_LO, /* type */
657 0, /* rightshift */
658 1, /* size (0 = byte, 1 = short, 2 = long) */
659 16, /* bitsize */
660 FALSE, /* pc_relative */
661 0, /* bitpos */
662 complain_overflow_dont, /* complain_on_overflow */
663 ppc_elf_unhandled_reloc, /* special_function */
664 "R_PPC_PLT16_LO", /* name */
665 FALSE, /* partial_inplace */
666 0, /* src_mask */
667 0xffff, /* dst_mask */
668 FALSE), /* pcrel_offset */
669
670 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
671 the symbol. */
672 HOWTO (R_PPC_PLT16_HI, /* type */
673 16, /* rightshift */
674 1, /* size (0 = byte, 1 = short, 2 = long) */
675 16, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_dont, /* complain_on_overflow */
679 ppc_elf_unhandled_reloc, /* special_function */
680 "R_PPC_PLT16_HI", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
687 the symbol. */
688 HOWTO (R_PPC_PLT16_HA, /* type */
689 16, /* rightshift */
690 1, /* size (0 = byte, 1 = short, 2 = long) */
691 16, /* bitsize */
692 FALSE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_dont, /* complain_on_overflow */
695 ppc_elf_unhandled_reloc, /* special_function */
696 "R_PPC_PLT16_HA", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffff, /* dst_mask */
700 FALSE), /* pcrel_offset */
701
702 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
703 small data items. */
704 HOWTO (R_PPC_SDAREL16, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_signed, /* complain_on_overflow */
711 ppc_elf_unhandled_reloc, /* special_function */
712 "R_PPC_SDAREL16", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit section relative relocation. */
719 HOWTO (R_PPC_SECTOFF, /* type */
720 0, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_signed, /* complain_on_overflow */
726 ppc_elf_unhandled_reloc, /* special_function */
727 "R_PPC_SECTOFF", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit lower half section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_LO, /* type */
735 0, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_dont, /* complain_on_overflow */
741 ppc_elf_unhandled_reloc, /* special_function */
742 "R_PPC_SECTOFF_LO", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* 16-bit upper half section relative relocation. */
749 HOWTO (R_PPC_SECTOFF_HI, /* type */
750 16, /* rightshift */
751 1, /* size (0 = byte, 1 = short, 2 = long) */
752 16, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 ppc_elf_unhandled_reloc, /* special_function */
757 "R_PPC_SECTOFF_HI", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0xffff, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* 16-bit upper half adjusted section relative relocation. */
764 HOWTO (R_PPC_SECTOFF_HA, /* type */
765 16, /* rightshift */
766 1, /* size (0 = byte, 1 = short, 2 = long) */
767 16, /* bitsize */
768 FALSE, /* pc_relative */
769 0, /* bitpos */
770 complain_overflow_dont, /* complain_on_overflow */
771 ppc_elf_unhandled_reloc, /* special_function */
772 "R_PPC_SECTOFF_HA", /* name */
773 FALSE, /* partial_inplace */
774 0, /* src_mask */
775 0xffff, /* dst_mask */
776 FALSE), /* pcrel_offset */
777
778 /* Marker relocs for TLS. */
779 HOWTO (R_PPC_TLS,
780 0, /* rightshift */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
782 32, /* bitsize */
783 FALSE, /* pc_relative */
784 0, /* bitpos */
785 complain_overflow_dont, /* complain_on_overflow */
786 bfd_elf_generic_reloc, /* special_function */
787 "R_PPC_TLS", /* name */
788 FALSE, /* partial_inplace */
789 0, /* src_mask */
790 0, /* dst_mask */
791 FALSE), /* pcrel_offset */
792
793 HOWTO (R_PPC_TLSGD,
794 0, /* rightshift */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
796 32, /* bitsize */
797 FALSE, /* pc_relative */
798 0, /* bitpos */
799 complain_overflow_dont, /* complain_on_overflow */
800 bfd_elf_generic_reloc, /* special_function */
801 "R_PPC_TLSGD", /* name */
802 FALSE, /* partial_inplace */
803 0, /* src_mask */
804 0, /* dst_mask */
805 FALSE), /* pcrel_offset */
806
807 HOWTO (R_PPC_TLSLD,
808 0, /* rightshift */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
810 32, /* bitsize */
811 FALSE, /* pc_relative */
812 0, /* bitpos */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 "R_PPC_TLSLD", /* name */
816 FALSE, /* partial_inplace */
817 0, /* src_mask */
818 0, /* dst_mask */
819 FALSE), /* pcrel_offset */
820
821 /* Marker relocs on inline plt call instructions. */
822 HOWTO (R_PPC_PLTSEQ,
823 0, /* rightshift */
824 2, /* size (0 = byte, 1 = short, 2 = long) */
825 32, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 bfd_elf_generic_reloc, /* special_function */
830 "R_PPC_PLTSEQ", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 HOWTO (R_PPC_PLTCALL,
837 0, /* rightshift */
838 2, /* size (0 = byte, 1 = short, 2 = long) */
839 32, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 bfd_elf_generic_reloc, /* special_function */
844 "R_PPC_PLTCALL", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Computes the load module index of the load module that contains the
851 definition of its TLS sym. */
852 HOWTO (R_PPC_DTPMOD32,
853 0, /* rightshift */
854 2, /* size (0 = byte, 1 = short, 2 = long) */
855 32, /* bitsize */
856 FALSE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 ppc_elf_unhandled_reloc, /* special_function */
860 "R_PPC_DTPMOD32", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 0xffffffff, /* dst_mask */
864 FALSE), /* pcrel_offset */
865
866 /* Computes a dtv-relative displacement, the difference between the value
867 of sym+add and the base address of the thread-local storage block that
868 contains the definition of sym, minus 0x8000. */
869 HOWTO (R_PPC_DTPREL32,
870 0, /* rightshift */
871 2, /* size (0 = byte, 1 = short, 2 = long) */
872 32, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 ppc_elf_unhandled_reloc, /* special_function */
877 "R_PPC_DTPREL32", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 0xffffffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* A 16 bit dtprel reloc. */
884 HOWTO (R_PPC_DTPREL16,
885 0, /* rightshift */
886 1, /* size (0 = byte, 1 = short, 2 = long) */
887 16, /* bitsize */
888 FALSE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_signed, /* complain_on_overflow */
891 ppc_elf_unhandled_reloc, /* special_function */
892 "R_PPC_DTPREL16", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 0xffff, /* dst_mask */
896 FALSE), /* pcrel_offset */
897
898 /* Like DTPREL16, but no overflow. */
899 HOWTO (R_PPC_DTPREL16_LO,
900 0, /* rightshift */
901 1, /* size (0 = byte, 1 = short, 2 = long) */
902 16, /* bitsize */
903 FALSE, /* pc_relative */
904 0, /* bitpos */
905 complain_overflow_dont, /* complain_on_overflow */
906 ppc_elf_unhandled_reloc, /* special_function */
907 "R_PPC_DTPREL16_LO", /* name */
908 FALSE, /* partial_inplace */
909 0, /* src_mask */
910 0xffff, /* dst_mask */
911 FALSE), /* pcrel_offset */
912
913 /* Like DTPREL16_LO, but next higher group of 16 bits. */
914 HOWTO (R_PPC_DTPREL16_HI,
915 16, /* rightshift */
916 1, /* size (0 = byte, 1 = short, 2 = long) */
917 16, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_dont, /* complain_on_overflow */
921 ppc_elf_unhandled_reloc, /* special_function */
922 "R_PPC_DTPREL16_HI", /* name */
923 FALSE, /* partial_inplace */
924 0, /* src_mask */
925 0xffff, /* dst_mask */
926 FALSE), /* pcrel_offset */
927
928 /* Like DTPREL16_HI, but adjust for low 16 bits. */
929 HOWTO (R_PPC_DTPREL16_HA,
930 16, /* rightshift */
931 1, /* size (0 = byte, 1 = short, 2 = long) */
932 16, /* bitsize */
933 FALSE, /* pc_relative */
934 0, /* bitpos */
935 complain_overflow_dont, /* complain_on_overflow */
936 ppc_elf_unhandled_reloc, /* special_function */
937 "R_PPC_DTPREL16_HA", /* name */
938 FALSE, /* partial_inplace */
939 0, /* src_mask */
940 0xffff, /* dst_mask */
941 FALSE), /* pcrel_offset */
942
943 /* Computes a tp-relative displacement, the difference between the value of
944 sym+add and the value of the thread pointer (r13). */
945 HOWTO (R_PPC_TPREL32,
946 0, /* rightshift */
947 2, /* size (0 = byte, 1 = short, 2 = long) */
948 32, /* bitsize */
949 FALSE, /* pc_relative */
950 0, /* bitpos */
951 complain_overflow_dont, /* complain_on_overflow */
952 ppc_elf_unhandled_reloc, /* special_function */
953 "R_PPC_TPREL32", /* name */
954 FALSE, /* partial_inplace */
955 0, /* src_mask */
956 0xffffffff, /* dst_mask */
957 FALSE), /* pcrel_offset */
958
959 /* A 16 bit tprel reloc. */
960 HOWTO (R_PPC_TPREL16,
961 0, /* rightshift */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
963 16, /* bitsize */
964 FALSE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_signed, /* complain_on_overflow */
967 ppc_elf_unhandled_reloc, /* special_function */
968 "R_PPC_TPREL16", /* name */
969 FALSE, /* partial_inplace */
970 0, /* src_mask */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
973
974 /* Like TPREL16, but no overflow. */
975 HOWTO (R_PPC_TPREL16_LO,
976 0, /* rightshift */
977 1, /* size (0 = byte, 1 = short, 2 = long) */
978 16, /* bitsize */
979 FALSE, /* pc_relative */
980 0, /* bitpos */
981 complain_overflow_dont, /* complain_on_overflow */
982 ppc_elf_unhandled_reloc, /* special_function */
983 "R_PPC_TPREL16_LO", /* name */
984 FALSE, /* partial_inplace */
985 0, /* src_mask */
986 0xffff, /* dst_mask */
987 FALSE), /* pcrel_offset */
988
989 /* Like TPREL16_LO, but next higher group of 16 bits. */
990 HOWTO (R_PPC_TPREL16_HI,
991 16, /* rightshift */
992 1, /* size (0 = byte, 1 = short, 2 = long) */
993 16, /* bitsize */
994 FALSE, /* pc_relative */
995 0, /* bitpos */
996 complain_overflow_dont, /* complain_on_overflow */
997 ppc_elf_unhandled_reloc, /* special_function */
998 "R_PPC_TPREL16_HI", /* name */
999 FALSE, /* partial_inplace */
1000 0, /* src_mask */
1001 0xffff, /* dst_mask */
1002 FALSE), /* pcrel_offset */
1003
1004 /* Like TPREL16_HI, but adjust for low 16 bits. */
1005 HOWTO (R_PPC_TPREL16_HA,
1006 16, /* rightshift */
1007 1, /* size (0 = byte, 1 = short, 2 = long) */
1008 16, /* bitsize */
1009 FALSE, /* pc_relative */
1010 0, /* bitpos */
1011 complain_overflow_dont, /* complain_on_overflow */
1012 ppc_elf_unhandled_reloc, /* special_function */
1013 "R_PPC_TPREL16_HA", /* name */
1014 FALSE, /* partial_inplace */
1015 0, /* src_mask */
1016 0xffff, /* dst_mask */
1017 FALSE), /* pcrel_offset */
1018
1019 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1020 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1021 to the first entry. */
1022 HOWTO (R_PPC_GOT_TLSGD16,
1023 0, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc_elf_unhandled_reloc, /* special_function */
1030 "R_PPC_GOT_TLSGD16", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* Like GOT_TLSGD16, but no overflow. */
1037 HOWTO (R_PPC_GOT_TLSGD16_LO,
1038 0, /* rightshift */
1039 1, /* size (0 = byte, 1 = short, 2 = long) */
1040 16, /* bitsize */
1041 FALSE, /* pc_relative */
1042 0, /* bitpos */
1043 complain_overflow_dont, /* complain_on_overflow */
1044 ppc_elf_unhandled_reloc, /* special_function */
1045 "R_PPC_GOT_TLSGD16_LO", /* name */
1046 FALSE, /* partial_inplace */
1047 0, /* src_mask */
1048 0xffff, /* dst_mask */
1049 FALSE), /* pcrel_offset */
1050
1051 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1052 HOWTO (R_PPC_GOT_TLSGD16_HI,
1053 16, /* rightshift */
1054 1, /* size (0 = byte, 1 = short, 2 = long) */
1055 16, /* bitsize */
1056 FALSE, /* pc_relative */
1057 0, /* bitpos */
1058 complain_overflow_dont, /* complain_on_overflow */
1059 ppc_elf_unhandled_reloc, /* special_function */
1060 "R_PPC_GOT_TLSGD16_HI", /* name */
1061 FALSE, /* partial_inplace */
1062 0, /* src_mask */
1063 0xffff, /* dst_mask */
1064 FALSE), /* pcrel_offset */
1065
1066 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1067 HOWTO (R_PPC_GOT_TLSGD16_HA,
1068 16, /* rightshift */
1069 1, /* size (0 = byte, 1 = short, 2 = long) */
1070 16, /* bitsize */
1071 FALSE, /* pc_relative */
1072 0, /* bitpos */
1073 complain_overflow_dont, /* complain_on_overflow */
1074 ppc_elf_unhandled_reloc, /* special_function */
1075 "R_PPC_GOT_TLSGD16_HA", /* name */
1076 FALSE, /* partial_inplace */
1077 0, /* src_mask */
1078 0xffff, /* dst_mask */
1079 FALSE), /* pcrel_offset */
1080
1081 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1082 with values (sym+add)@dtpmod and zero, and computes the offset to the
1083 first entry. */
1084 HOWTO (R_PPC_GOT_TLSLD16,
1085 0, /* rightshift */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1087 16, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_signed, /* complain_on_overflow */
1091 ppc_elf_unhandled_reloc, /* special_function */
1092 "R_PPC_GOT_TLSLD16", /* name */
1093 FALSE, /* partial_inplace */
1094 0, /* src_mask */
1095 0xffff, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 /* Like GOT_TLSLD16, but no overflow. */
1099 HOWTO (R_PPC_GOT_TLSLD16_LO,
1100 0, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 16, /* bitsize */
1103 FALSE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_dont, /* complain_on_overflow */
1106 ppc_elf_unhandled_reloc, /* special_function */
1107 "R_PPC_GOT_TLSLD16_LO", /* name */
1108 FALSE, /* partial_inplace */
1109 0, /* src_mask */
1110 0xffff, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1112
1113 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1114 HOWTO (R_PPC_GOT_TLSLD16_HI,
1115 16, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_dont, /* complain_on_overflow */
1121 ppc_elf_unhandled_reloc, /* special_function */
1122 "R_PPC_GOT_TLSLD16_HI", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xffff, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1129 HOWTO (R_PPC_GOT_TLSLD16_HA,
1130 16, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc_elf_unhandled_reloc, /* special_function */
1137 "R_PPC_GOT_TLSLD16_HA", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xffff, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1144 the offset to the entry. */
1145 HOWTO (R_PPC_GOT_DTPREL16,
1146 0, /* rightshift */
1147 1, /* size (0 = byte, 1 = short, 2 = long) */
1148 16, /* bitsize */
1149 FALSE, /* pc_relative */
1150 0, /* bitpos */
1151 complain_overflow_signed, /* complain_on_overflow */
1152 ppc_elf_unhandled_reloc, /* special_function */
1153 "R_PPC_GOT_DTPREL16", /* name */
1154 FALSE, /* partial_inplace */
1155 0, /* src_mask */
1156 0xffff, /* dst_mask */
1157 FALSE), /* pcrel_offset */
1158
1159 /* Like GOT_DTPREL16, but no overflow. */
1160 HOWTO (R_PPC_GOT_DTPREL16_LO,
1161 0, /* rightshift */
1162 1, /* size (0 = byte, 1 = short, 2 = long) */
1163 16, /* bitsize */
1164 FALSE, /* pc_relative */
1165 0, /* bitpos */
1166 complain_overflow_dont, /* complain_on_overflow */
1167 ppc_elf_unhandled_reloc, /* special_function */
1168 "R_PPC_GOT_DTPREL16_LO", /* name */
1169 FALSE, /* partial_inplace */
1170 0, /* src_mask */
1171 0xffff, /* dst_mask */
1172 FALSE), /* pcrel_offset */
1173
1174 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1175 HOWTO (R_PPC_GOT_DTPREL16_HI,
1176 16, /* rightshift */
1177 1, /* size (0 = byte, 1 = short, 2 = long) */
1178 16, /* bitsize */
1179 FALSE, /* pc_relative */
1180 0, /* bitpos */
1181 complain_overflow_dont, /* complain_on_overflow */
1182 ppc_elf_unhandled_reloc, /* special_function */
1183 "R_PPC_GOT_DTPREL16_HI", /* name */
1184 FALSE, /* partial_inplace */
1185 0, /* src_mask */
1186 0xffff, /* dst_mask */
1187 FALSE), /* pcrel_offset */
1188
1189 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1190 HOWTO (R_PPC_GOT_DTPREL16_HA,
1191 16, /* rightshift */
1192 1, /* size (0 = byte, 1 = short, 2 = long) */
1193 16, /* bitsize */
1194 FALSE, /* pc_relative */
1195 0, /* bitpos */
1196 complain_overflow_dont, /* complain_on_overflow */
1197 ppc_elf_unhandled_reloc, /* special_function */
1198 "R_PPC_GOT_DTPREL16_HA", /* name */
1199 FALSE, /* partial_inplace */
1200 0, /* src_mask */
1201 0xffff, /* dst_mask */
1202 FALSE), /* pcrel_offset */
1203
1204 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1205 offset to the entry. */
1206 HOWTO (R_PPC_GOT_TPREL16,
1207 0, /* rightshift */
1208 1, /* size (0 = byte, 1 = short, 2 = long) */
1209 16, /* bitsize */
1210 FALSE, /* pc_relative */
1211 0, /* bitpos */
1212 complain_overflow_signed, /* complain_on_overflow */
1213 ppc_elf_unhandled_reloc, /* special_function */
1214 "R_PPC_GOT_TPREL16", /* name */
1215 FALSE, /* partial_inplace */
1216 0, /* src_mask */
1217 0xffff, /* dst_mask */
1218 FALSE), /* pcrel_offset */
1219
1220 /* Like GOT_TPREL16, but no overflow. */
1221 HOWTO (R_PPC_GOT_TPREL16_LO,
1222 0, /* rightshift */
1223 1, /* size (0 = byte, 1 = short, 2 = long) */
1224 16, /* bitsize */
1225 FALSE, /* pc_relative */
1226 0, /* bitpos */
1227 complain_overflow_dont, /* complain_on_overflow */
1228 ppc_elf_unhandled_reloc, /* special_function */
1229 "R_PPC_GOT_TPREL16_LO", /* name */
1230 FALSE, /* partial_inplace */
1231 0, /* src_mask */
1232 0xffff, /* dst_mask */
1233 FALSE), /* pcrel_offset */
1234
1235 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1236 HOWTO (R_PPC_GOT_TPREL16_HI,
1237 16, /* rightshift */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1239 16, /* bitsize */
1240 FALSE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_dont, /* complain_on_overflow */
1243 ppc_elf_unhandled_reloc, /* special_function */
1244 "R_PPC_GOT_TPREL16_HI", /* name */
1245 FALSE, /* partial_inplace */
1246 0, /* src_mask */
1247 0xffff, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1249
1250 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1251 HOWTO (R_PPC_GOT_TPREL16_HA,
1252 16, /* rightshift */
1253 1, /* size (0 = byte, 1 = short, 2 = long) */
1254 16, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 ppc_elf_unhandled_reloc, /* special_function */
1259 "R_PPC_GOT_TPREL16_HA", /* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0xffff, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 /* The remaining relocs are from the Embedded ELF ABI, and are not
1266 in the SVR4 ELF ABI. */
1267
1268 /* 32 bit value resulting from the addend minus the symbol. */
1269 HOWTO (R_PPC_EMB_NADDR32, /* type */
1270 0, /* rightshift */
1271 2, /* size (0 = byte, 1 = short, 2 = long) */
1272 32, /* bitsize */
1273 FALSE, /* pc_relative */
1274 0, /* bitpos */
1275 complain_overflow_dont, /* complain_on_overflow */
1276 ppc_elf_unhandled_reloc, /* special_function */
1277 "R_PPC_EMB_NADDR32", /* name */
1278 FALSE, /* partial_inplace */
1279 0, /* src_mask */
1280 0xffffffff, /* dst_mask */
1281 FALSE), /* pcrel_offset */
1282
1283 /* 16 bit value resulting from the addend minus the symbol. */
1284 HOWTO (R_PPC_EMB_NADDR16, /* type */
1285 0, /* rightshift */
1286 1, /* size (0 = byte, 1 = short, 2 = long) */
1287 16, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_signed, /* complain_on_overflow */
1291 ppc_elf_unhandled_reloc, /* special_function */
1292 "R_PPC_EMB_NADDR16", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 0xffff, /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* 16 bit value resulting from the addend minus the symbol. */
1299 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1300 0, /* rightshift */
1301 1, /* size (0 = byte, 1 = short, 2 = long) */
1302 16, /* bitsize */
1303 FALSE, /* pc_relative */
1304 0, /* bitpos */
1305 complain_overflow_dont,/* complain_on_overflow */
1306 ppc_elf_unhandled_reloc, /* special_function */
1307 "R_PPC_EMB_ADDR16_LO", /* name */
1308 FALSE, /* partial_inplace */
1309 0, /* src_mask */
1310 0xffff, /* dst_mask */
1311 FALSE), /* pcrel_offset */
1312
1313 /* The high order 16 bits of the addend minus the symbol. */
1314 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1315 16, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_dont, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_NADDR16_HI", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* The high order 16 bits of the result of the addend minus the address,
1329 plus 1 if the contents of the low 16 bits, treated as a signed number,
1330 is negative. */
1331 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1332 16, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_NADDR16_HA", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* 16 bit value resulting from allocating a 4 byte word to hold an
1346 address in the .sdata section, and returning the offset from
1347 _SDA_BASE_ for that relocation. */
1348 HOWTO (R_PPC_EMB_SDAI16, /* type */
1349 0, /* rightshift */
1350 1, /* size (0 = byte, 1 = short, 2 = long) */
1351 16, /* bitsize */
1352 FALSE, /* pc_relative */
1353 0, /* bitpos */
1354 complain_overflow_signed, /* complain_on_overflow */
1355 ppc_elf_unhandled_reloc, /* special_function */
1356 "R_PPC_EMB_SDAI16", /* name */
1357 FALSE, /* partial_inplace */
1358 0, /* src_mask */
1359 0xffff, /* dst_mask */
1360 FALSE), /* pcrel_offset */
1361
1362 /* 16 bit value resulting from allocating a 4 byte word to hold an
1363 address in the .sdata2 section, and returning the offset from
1364 _SDA2_BASE_ for that relocation. */
1365 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 FALSE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_signed, /* complain_on_overflow */
1372 ppc_elf_unhandled_reloc, /* special_function */
1373 "R_PPC_EMB_SDA2I16", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 FALSE), /* pcrel_offset */
1378
1379 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1380 small data items. */
1381 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1382 0, /* rightshift */
1383 1, /* size (0 = byte, 1 = short, 2 = long) */
1384 16, /* bitsize */
1385 FALSE, /* pc_relative */
1386 0, /* bitpos */
1387 complain_overflow_signed, /* complain_on_overflow */
1388 ppc_elf_unhandled_reloc, /* special_function */
1389 "R_PPC_EMB_SDA2REL", /* name */
1390 FALSE, /* partial_inplace */
1391 0, /* src_mask */
1392 0xffff, /* dst_mask */
1393 FALSE), /* pcrel_offset */
1394
1395 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1396 signed offset from the appropriate base, and filling in the register
1397 field with the appropriate register (0, 2, or 13). */
1398 HOWTO (R_PPC_EMB_SDA21, /* type */
1399 0, /* rightshift */
1400 2, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 FALSE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_signed, /* complain_on_overflow */
1405 ppc_elf_unhandled_reloc, /* special_function */
1406 "R_PPC_EMB_SDA21", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 FALSE), /* pcrel_offset */
1411
1412 /* Relocation not handled: R_PPC_EMB_MRKREF */
1413 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1414 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1415 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1416 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1417 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1418
1419 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1420 in the 16 bit signed offset from the appropriate base, and filling in the
1421 register field with the appropriate register (0, 2, or 13). */
1422 HOWTO (R_PPC_EMB_RELSDA, /* type */
1423 0, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_signed, /* complain_on_overflow */
1429 ppc_elf_unhandled_reloc, /* special_function */
1430 "R_PPC_EMB_RELSDA", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xffff, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* A relative 8 bit branch. */
1437 HOWTO (R_PPC_VLE_REL8, /* type */
1438 1, /* rightshift */
1439 1, /* size (0 = byte, 1 = short, 2 = long) */
1440 8, /* bitsize */
1441 TRUE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_signed, /* complain_on_overflow */
1444 bfd_elf_generic_reloc, /* special_function */
1445 "R_PPC_VLE_REL8", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 0xff, /* dst_mask */
1449 TRUE), /* pcrel_offset */
1450
1451 /* A relative 15 bit branch. */
1452 HOWTO (R_PPC_VLE_REL15, /* type */
1453 1, /* rightshift */
1454 2, /* size (0 = byte, 1 = short, 2 = long) */
1455 15, /* bitsize */
1456 TRUE, /* pc_relative */
1457 1, /* bitpos */
1458 complain_overflow_signed, /* complain_on_overflow */
1459 bfd_elf_generic_reloc, /* special_function */
1460 "R_PPC_VLE_REL15", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xfffe, /* dst_mask */
1464 TRUE), /* pcrel_offset */
1465
1466 /* A relative 24 bit branch. */
1467 HOWTO (R_PPC_VLE_REL24, /* type */
1468 1, /* rightshift */
1469 2, /* size (0 = byte, 1 = short, 2 = long) */
1470 24, /* bitsize */
1471 TRUE, /* pc_relative */
1472 1, /* bitpos */
1473 complain_overflow_signed, /* complain_on_overflow */
1474 bfd_elf_generic_reloc, /* special_function */
1475 "R_PPC_VLE_REL24", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 0x1fffffe, /* dst_mask */
1479 TRUE), /* pcrel_offset */
1480
1481 /* The 16 LSBS in split16a format. */
1482 HOWTO (R_PPC_VLE_LO16A, /* type */
1483 0, /* rightshift */
1484 2, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_dont, /* complain_on_overflow */
1489 ppc_elf_unhandled_reloc, /* special_function */
1490 "R_PPC_VLE_LO16A", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0x1f07ff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* The 16 LSBS in split16d format. */
1497 HOWTO (R_PPC_VLE_LO16D, /* type */
1498 0, /* rightshift */
1499 2, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc_elf_unhandled_reloc, /* special_function */
1505 "R_PPC_VLE_LO16D", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0x3e007ff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Bits 16-31 split16a format. */
1512 HOWTO (R_PPC_VLE_HI16A, /* type */
1513 16, /* rightshift */
1514 2, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc_elf_unhandled_reloc, /* special_function */
1520 "R_PPC_VLE_HI16A", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0x1f07ff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Bits 16-31 split16d format. */
1527 HOWTO (R_PPC_VLE_HI16D, /* type */
1528 16, /* rightshift */
1529 2, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc_elf_unhandled_reloc, /* special_function */
1535 "R_PPC_VLE_HI16D", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0x3e007ff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Bits 16-31 (High Adjusted) in split16a format. */
1542 HOWTO (R_PPC_VLE_HA16A, /* type */
1543 16, /* rightshift */
1544 2, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc_elf_unhandled_reloc, /* special_function */
1550 "R_PPC_VLE_HA16A", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0x1f07ff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Bits 16-31 (High Adjusted) in split16d format. */
1557 HOWTO (R_PPC_VLE_HA16D, /* type */
1558 16, /* rightshift */
1559 2, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc_elf_unhandled_reloc, /* special_function */
1565 "R_PPC_VLE_HA16D", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0x3e007ff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1572 instructions. If the register base is 0 then the linker changes
1573 the e_add16i to an e_li instruction. */
1574 HOWTO (R_PPC_VLE_SDA21, /* type */
1575 0, /* rightshift */
1576 2, /* size (0 = byte, 1 = short, 2 = long) */
1577 16, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_signed, /* complain_on_overflow */
1581 ppc_elf_unhandled_reloc, /* special_function */
1582 "R_PPC_VLE_SDA21", /* name */
1583 FALSE, /* partial_inplace */
1584 0, /* src_mask */
1585 0xffff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1589 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1590 0, /* rightshift */
1591 2, /* size (0 = byte, 1 = short, 2 = long) */
1592 16, /* bitsize */
1593 FALSE, /* pc_relative */
1594 0, /* bitpos */
1595 complain_overflow_dont, /* complain_on_overflow */
1596 ppc_elf_unhandled_reloc, /* special_function */
1597 "R_PPC_VLE_SDA21_LO", /* name */
1598 FALSE, /* partial_inplace */
1599 0, /* src_mask */
1600 0xffff, /* dst_mask */
1601 FALSE), /* pcrel_offset */
1602
1603 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1604 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1605 0, /* rightshift */
1606 2, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_dont, /* complain_on_overflow */
1611 ppc_elf_unhandled_reloc, /* special_function */
1612 "R_PPC_VLE_SDAREL_LO16A", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0x1f07ff, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1619 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1620 0, /* rightshift */
1621 2, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_dont, /* complain_on_overflow */
1626 ppc_elf_unhandled_reloc, /* special_function */
1627 "R_PPC_VLE_SDAREL_LO16D", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0x3e007ff, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1634 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1635 16, /* rightshift */
1636 2, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_dont, /* complain_on_overflow */
1641 ppc_elf_unhandled_reloc, /* special_function */
1642 "R_PPC_VLE_SDAREL_HI16A", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0x1f07ff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1649 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1650 16, /* rightshift */
1651 2, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc_elf_unhandled_reloc, /* special_function */
1657 "R_PPC_VLE_SDAREL_HI16D", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0x3e007ff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1664 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1665 16, /* rightshift */
1666 2, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc_elf_unhandled_reloc, /* special_function */
1672 "R_PPC_VLE_SDAREL_HA16A", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0x1f07ff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1679 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1680 16, /* rightshift */
1681 2, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc_elf_unhandled_reloc, /* special_function */
1687 "R_PPC_VLE_SDAREL_HA16D", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0x3e007ff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* e_li split20 format. */
1694 HOWTO (R_PPC_VLE_ADDR20, /* type */
1695 16, /* rightshift */
1696 2, /* size (0 = byte, 1 = short, 2 = long) */
1697 20, /* bitsize */
1698 FALSE, /* pc_relative */
1699 0, /* bitpos */
1700 complain_overflow_dont, /* complain_on_overflow */
1701 bfd_elf_generic_reloc, /* special_function */
1702 "R_PPC_VLE_ADDR20", /* name */
1703 FALSE, /* partial_inplace */
1704 0, /* src_mask */
1705 0x1f07ff, /* dst_mask */
1706 FALSE), /* pcrel_offset */
1707
1708 HOWTO (R_PPC_IRELATIVE, /* type */
1709 0, /* rightshift */
1710 2, /* size (0 = byte, 1 = short, 2 = long) */
1711 32, /* bitsize */
1712 FALSE, /* pc_relative */
1713 0, /* bitpos */
1714 complain_overflow_dont, /* complain_on_overflow */
1715 ppc_elf_unhandled_reloc, /* special_function */
1716 "R_PPC_IRELATIVE", /* name */
1717 FALSE, /* partial_inplace */
1718 0, /* src_mask */
1719 0xffffffff, /* dst_mask */
1720 FALSE), /* pcrel_offset */
1721
1722 /* A 16 bit relative relocation. */
1723 HOWTO (R_PPC_REL16, /* type */
1724 0, /* rightshift */
1725 1, /* size (0 = byte, 1 = short, 2 = long) */
1726 16, /* bitsize */
1727 TRUE, /* pc_relative */
1728 0, /* bitpos */
1729 complain_overflow_signed, /* complain_on_overflow */
1730 bfd_elf_generic_reloc, /* special_function */
1731 "R_PPC_REL16", /* name */
1732 FALSE, /* partial_inplace */
1733 0, /* src_mask */
1734 0xffff, /* dst_mask */
1735 TRUE), /* pcrel_offset */
1736
1737 /* A 16 bit relative relocation without overflow. */
1738 HOWTO (R_PPC_REL16_LO, /* type */
1739 0, /* rightshift */
1740 1, /* size (0 = byte, 1 = short, 2 = long) */
1741 16, /* bitsize */
1742 TRUE, /* pc_relative */
1743 0, /* bitpos */
1744 complain_overflow_dont,/* complain_on_overflow */
1745 bfd_elf_generic_reloc, /* special_function */
1746 "R_PPC_REL16_LO", /* name */
1747 FALSE, /* partial_inplace */
1748 0, /* src_mask */
1749 0xffff, /* dst_mask */
1750 TRUE), /* pcrel_offset */
1751
1752 /* The high order 16 bits of a relative address. */
1753 HOWTO (R_PPC_REL16_HI, /* type */
1754 16, /* rightshift */
1755 1, /* size (0 = byte, 1 = short, 2 = long) */
1756 16, /* bitsize */
1757 TRUE, /* pc_relative */
1758 0, /* bitpos */
1759 complain_overflow_dont, /* complain_on_overflow */
1760 bfd_elf_generic_reloc, /* special_function */
1761 "R_PPC_REL16_HI", /* name */
1762 FALSE, /* partial_inplace */
1763 0, /* src_mask */
1764 0xffff, /* dst_mask */
1765 TRUE), /* pcrel_offset */
1766
1767 /* The high order 16 bits of a relative address, plus 1 if the contents of
1768 the low 16 bits, treated as a signed number, is negative. */
1769 HOWTO (R_PPC_REL16_HA, /* type */
1770 16, /* rightshift */
1771 1, /* size (0 = byte, 1 = short, 2 = long) */
1772 16, /* bitsize */
1773 TRUE, /* pc_relative */
1774 0, /* bitpos */
1775 complain_overflow_dont, /* complain_on_overflow */
1776 ppc_elf_addr16_ha_reloc, /* special_function */
1777 "R_PPC_REL16_HA", /* name */
1778 FALSE, /* partial_inplace */
1779 0, /* src_mask */
1780 0xffff, /* dst_mask */
1781 TRUE), /* pcrel_offset */
1782
1783 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1784 HOWTO (R_PPC_REL16DX_HA, /* type */
1785 16, /* rightshift */
1786 2, /* size (0 = byte, 1 = short, 2 = long) */
1787 16, /* bitsize */
1788 TRUE, /* pc_relative */
1789 0, /* bitpos */
1790 complain_overflow_signed, /* complain_on_overflow */
1791 ppc_elf_addr16_ha_reloc, /* special_function */
1792 "R_PPC_REL16DX_HA", /* name */
1793 FALSE, /* partial_inplace */
1794 0, /* src_mask */
1795 0x1fffc1, /* dst_mask */
1796 TRUE), /* pcrel_offset */
1797
1798 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1799 HOWTO (R_PPC_16DX_HA, /* type */
1800 16, /* rightshift */
1801 2, /* size (0 = byte, 1 = short, 2 = long) */
1802 16, /* bitsize */
1803 FALSE, /* pc_relative */
1804 0, /* bitpos */
1805 complain_overflow_signed, /* complain_on_overflow */
1806 ppc_elf_addr16_ha_reloc, /* special_function */
1807 "R_PPC_16DX_HA", /* name */
1808 FALSE, /* partial_inplace */
1809 0, /* src_mask */
1810 0x1fffc1, /* dst_mask */
1811 FALSE), /* pcrel_offset */
1812
1813 /* GNU extension to record C++ vtable hierarchy. */
1814 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1815 0, /* rightshift */
1816 0, /* size (0 = byte, 1 = short, 2 = long) */
1817 0, /* bitsize */
1818 FALSE, /* pc_relative */
1819 0, /* bitpos */
1820 complain_overflow_dont, /* complain_on_overflow */
1821 NULL, /* special_function */
1822 "R_PPC_GNU_VTINHERIT", /* name */
1823 FALSE, /* partial_inplace */
1824 0, /* src_mask */
1825 0, /* dst_mask */
1826 FALSE), /* pcrel_offset */
1827
1828 /* GNU extension to record C++ vtable member usage. */
1829 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1830 0, /* rightshift */
1831 0, /* size (0 = byte, 1 = short, 2 = long) */
1832 0, /* bitsize */
1833 FALSE, /* pc_relative */
1834 0, /* bitpos */
1835 complain_overflow_dont, /* complain_on_overflow */
1836 NULL, /* special_function */
1837 "R_PPC_GNU_VTENTRY", /* name */
1838 FALSE, /* partial_inplace */
1839 0, /* src_mask */
1840 0, /* dst_mask */
1841 FALSE), /* pcrel_offset */
1842
1843 /* Phony reloc to handle AIX style TOC entries. */
1844 HOWTO (R_PPC_TOC16, /* type */
1845 0, /* rightshift */
1846 1, /* size (0 = byte, 1 = short, 2 = long) */
1847 16, /* bitsize */
1848 FALSE, /* pc_relative */
1849 0, /* bitpos */
1850 complain_overflow_signed, /* complain_on_overflow */
1851 ppc_elf_unhandled_reloc, /* special_function */
1852 "R_PPC_TOC16", /* name */
1853 FALSE, /* partial_inplace */
1854 0, /* src_mask */
1855 0xffff, /* dst_mask */
1856 FALSE), /* pcrel_offset */
1857 };
1858 \f
1859 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1860
1861 static void
1862 ppc_elf_howto_init (void)
1863 {
1864 unsigned int i, type;
1865
1866 for (i = 0;
1867 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1868 i++)
1869 {
1870 type = ppc_elf_howto_raw[i].type;
1871 if (type >= (sizeof (ppc_elf_howto_table)
1872 / sizeof (ppc_elf_howto_table[0])))
1873 abort ();
1874 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1875 }
1876 }
1877
1878 static reloc_howto_type *
1879 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1880 bfd_reloc_code_real_type code)
1881 {
1882 enum elf_ppc_reloc_type r;
1883
1884 /* Initialize howto table if not already done. */
1885 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1886 ppc_elf_howto_init ();
1887
1888 switch (code)
1889 {
1890 default:
1891 return NULL;
1892
1893 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1894 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1895 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1896 case BFD_RELOC_PPC64_ADDR16_DS:
1897 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1898 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1899 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1900 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1901 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1902 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1903 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1904 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1905 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1906 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1907 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1908 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1909 case BFD_RELOC_PPC64_GOT16_DS:
1910 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1911 case BFD_RELOC_PPC64_GOT16_LO_DS:
1912 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1913 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1914 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1915 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1916 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1917 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1918 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1919 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1920 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1921 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1922 case BFD_RELOC_PPC64_PLT16_LO_DS:
1923 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1924 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1925 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1926 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1927 case BFD_RELOC_PPC64_SECTOFF_DS:
1928 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1929 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1930 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1931 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1932 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1933 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1934 case BFD_RELOC_PPC64_TOC16_DS:
1935 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1936 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1937 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1938 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1939 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1940 case BFD_RELOC_PPC64_TPREL16_DS:
1941 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1942 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1943 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1944 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1945 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1946 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1947 case BFD_RELOC_PPC64_DTPREL16_DS:
1948 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1949 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1950 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1951 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1952 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1953 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1954 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1955 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1956 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1957 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1958 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1959 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1960 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1961 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1962 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1963 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1964 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1965 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1966 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1967 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1968 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1969 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1970 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1971 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1972 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1973 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1974 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1975 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1976 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1977 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1978 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1979 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1980 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1981 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1982 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1983 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1984 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1985 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1986 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1987 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1988 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1989 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1990 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1991 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1992 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1993 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1994 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1995 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1996 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1997 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1998 r = R_PPC_VLE_SDAREL_LO16A;
1999 break;
2000 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
2001 r = R_PPC_VLE_SDAREL_LO16D;
2002 break;
2003 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
2004 r = R_PPC_VLE_SDAREL_HI16A;
2005 break;
2006 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
2007 r = R_PPC_VLE_SDAREL_HI16D;
2008 break;
2009 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
2010 r = R_PPC_VLE_SDAREL_HA16A;
2011 break;
2012 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
2013 r = R_PPC_VLE_SDAREL_HA16D;
2014 break;
2015 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2016 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2017 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2018 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2019 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
2020 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2021 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2022 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2023 }
2024
2025 return ppc_elf_howto_table[r];
2026 };
2027
2028 static reloc_howto_type *
2029 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2030 const char *r_name)
2031 {
2032 unsigned int i;
2033
2034 for (i = 0;
2035 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2036 i++)
2037 if (ppc_elf_howto_raw[i].name != NULL
2038 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2039 return &ppc_elf_howto_raw[i];
2040
2041 return NULL;
2042 }
2043
2044 /* Set the howto pointer for a PowerPC ELF reloc. */
2045
2046 static bfd_boolean
2047 ppc_elf_info_to_howto (bfd *abfd,
2048 arelent *cache_ptr,
2049 Elf_Internal_Rela *dst)
2050 {
2051 unsigned int r_type;
2052
2053 /* Initialize howto table if not already done. */
2054 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2055 ppc_elf_howto_init ();
2056
2057 r_type = ELF32_R_TYPE (dst->r_info);
2058 if (r_type >= R_PPC_max)
2059 {
2060 /* xgettext:c-format */
2061 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2062 abfd, r_type);
2063 bfd_set_error (bfd_error_bad_value);
2064 return FALSE;
2065 }
2066
2067 cache_ptr->howto = ppc_elf_howto_table[r_type];
2068
2069 /* Just because the above assert didn't trigger doesn't mean that
2070 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2071 if (cache_ptr->howto == NULL)
2072 {
2073 /* xgettext:c-format */
2074 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2075 abfd, r_type);
2076 bfd_set_error (bfd_error_bad_value);
2077
2078 return FALSE;
2079 }
2080
2081 return TRUE;
2082 }
2083
2084 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2085
2086 static bfd_reloc_status_type
2087 ppc_elf_addr16_ha_reloc (bfd *abfd,
2088 arelent *reloc_entry,
2089 asymbol *symbol,
2090 void *data,
2091 asection *input_section,
2092 bfd *output_bfd,
2093 char **error_message ATTRIBUTE_UNUSED)
2094 {
2095 enum elf_ppc_reloc_type r_type;
2096 long insn;
2097 bfd_size_type octets;
2098 bfd_vma value;
2099
2100 if (output_bfd != NULL)
2101 {
2102 reloc_entry->address += input_section->output_offset;
2103 return bfd_reloc_ok;
2104 }
2105
2106 reloc_entry->addend += 0x8000;
2107 r_type = reloc_entry->howto->type;
2108 if (r_type != R_PPC_REL16DX_HA)
2109 return bfd_reloc_continue;
2110
2111 value = 0;
2112 if (!bfd_is_com_section (symbol->section))
2113 value = symbol->value;
2114 value += (reloc_entry->addend
2115 + symbol->section->output_offset
2116 + symbol->section->output_section->vma);
2117 value -= (reloc_entry->address
2118 + input_section->output_offset
2119 + input_section->output_section->vma);
2120 value >>= 16;
2121
2122 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2123 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2124 insn &= ~0x1fffc1;
2125 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2126 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2127 return bfd_reloc_ok;
2128 }
2129
2130 static bfd_reloc_status_type
2131 ppc_elf_unhandled_reloc (bfd *abfd,
2132 arelent *reloc_entry,
2133 asymbol *symbol,
2134 void *data,
2135 asection *input_section,
2136 bfd *output_bfd,
2137 char **error_message)
2138 {
2139 /* If this is a relocatable link (output_bfd test tells us), just
2140 call the generic function. Any adjustment will be done at final
2141 link time. */
2142 if (output_bfd != NULL)
2143 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2144 input_section, output_bfd, error_message);
2145
2146 if (error_message != NULL)
2147 {
2148 static char buf[60];
2149 sprintf (buf, _("generic linker can't handle %s"),
2150 reloc_entry->howto->name);
2151 *error_message = buf;
2152 }
2153 return bfd_reloc_dangerous;
2154 }
2155 \f
2156 /* Sections created by the linker. */
2157
2158 typedef struct elf_linker_section
2159 {
2160 /* Pointer to the bfd section. */
2161 asection *section;
2162 /* Section name. */
2163 const char *name;
2164 /* Associated bss section name. */
2165 const char *bss_name;
2166 /* Associated symbol name. */
2167 const char *sym_name;
2168 /* Associated symbol. */
2169 struct elf_link_hash_entry *sym;
2170 } elf_linker_section_t;
2171
2172 /* Linked list of allocated pointer entries. This hangs off of the
2173 symbol lists, and provides allows us to return different pointers,
2174 based on different addend's. */
2175
2176 typedef struct elf_linker_section_pointers
2177 {
2178 /* next allocated pointer for this symbol */
2179 struct elf_linker_section_pointers *next;
2180 /* offset of pointer from beginning of section */
2181 bfd_vma offset;
2182 /* addend used */
2183 bfd_vma addend;
2184 /* which linker section this is */
2185 elf_linker_section_t *lsect;
2186 } elf_linker_section_pointers_t;
2187
2188 struct ppc_elf_obj_tdata
2189 {
2190 struct elf_obj_tdata elf;
2191
2192 /* A mapping from local symbols to offsets into the various linker
2193 sections added. This is index by the symbol index. */
2194 elf_linker_section_pointers_t **linker_section_pointers;
2195
2196 /* Flags used to auto-detect plt type. */
2197 unsigned int makes_plt_call : 1;
2198 unsigned int has_rel16 : 1;
2199 };
2200
2201 #define ppc_elf_tdata(bfd) \
2202 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2203
2204 #define elf_local_ptr_offsets(bfd) \
2205 (ppc_elf_tdata (bfd)->linker_section_pointers)
2206
2207 #define is_ppc_elf(bfd) \
2208 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2209 && elf_object_id (bfd) == PPC32_ELF_DATA)
2210
2211 /* Override the generic function because we store some extras. */
2212
2213 static bfd_boolean
2214 ppc_elf_mkobject (bfd *abfd)
2215 {
2216 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2217 PPC32_ELF_DATA);
2218 }
2219
2220 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2221
2222 bfd_boolean
2223 _bfd_elf_ppc_set_arch (bfd *abfd)
2224 {
2225 unsigned long mach = 0;
2226 asection *s;
2227 unsigned char *contents;
2228
2229 if (abfd->arch_info->bits_per_word == 32
2230 && bfd_big_endian (abfd))
2231 {
2232
2233 for (s = abfd->sections; s != NULL; s = s->next)
2234 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2235 break;
2236 if (s != NULL)
2237 mach = bfd_mach_ppc_vle;
2238 }
2239
2240 if (mach == 0)
2241 {
2242 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2243 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2244 {
2245 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2246 unsigned int i;
2247
2248 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2249 {
2250 unsigned int val = bfd_get_32 (abfd, contents + i);
2251 switch (val >> 16)
2252 {
2253 case PPC_APUINFO_PMR:
2254 case PPC_APUINFO_RFMCI:
2255 if (mach == 0)
2256 mach = bfd_mach_ppc_titan;
2257 break;
2258
2259 case PPC_APUINFO_ISEL:
2260 case PPC_APUINFO_CACHELCK:
2261 if (mach == bfd_mach_ppc_titan)
2262 mach = bfd_mach_ppc_e500mc;
2263 break;
2264
2265 case PPC_APUINFO_SPE:
2266 case PPC_APUINFO_EFS:
2267 case PPC_APUINFO_BRLOCK:
2268 if (mach != bfd_mach_ppc_vle)
2269 mach = bfd_mach_ppc_e500;
2270 break;
2271
2272 case PPC_APUINFO_VLE:
2273 mach = bfd_mach_ppc_vle;
2274 break;
2275
2276 default:
2277 mach = -1ul;
2278 }
2279 }
2280 free (contents);
2281 }
2282 }
2283
2284 if (mach != 0 && mach != -1ul)
2285 {
2286 const bfd_arch_info_type *arch;
2287
2288 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2289 if (arch->mach == mach)
2290 {
2291 abfd->arch_info = arch;
2292 break;
2293 }
2294 }
2295 return TRUE;
2296 }
2297
2298 /* Fix bad default arch selected for a 32 bit input bfd when the
2299 default is 64 bit. Also select arch based on apuinfo. */
2300
2301 static bfd_boolean
2302 ppc_elf_object_p (bfd *abfd)
2303 {
2304 if (!abfd->arch_info->the_default)
2305 return TRUE;
2306
2307 if (abfd->arch_info->bits_per_word == 64)
2308 {
2309 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2310
2311 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2312 {
2313 /* Relies on arch after 64 bit default being 32 bit default. */
2314 abfd->arch_info = abfd->arch_info->next;
2315 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2316 }
2317 }
2318 return _bfd_elf_ppc_set_arch (abfd);
2319 }
2320
2321 /* Function to set whether a module needs the -mrelocatable bit set. */
2322
2323 static bfd_boolean
2324 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2325 {
2326 BFD_ASSERT (!elf_flags_init (abfd)
2327 || elf_elfheader (abfd)->e_flags == flags);
2328
2329 elf_elfheader (abfd)->e_flags = flags;
2330 elf_flags_init (abfd) = TRUE;
2331 return TRUE;
2332 }
2333
2334 /* Support for core dump NOTE sections. */
2335
2336 static bfd_boolean
2337 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2338 {
2339 int offset;
2340 unsigned int size;
2341
2342 switch (note->descsz)
2343 {
2344 default:
2345 return FALSE;
2346
2347 case 268: /* Linux/PPC. */
2348 /* pr_cursig */
2349 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2350
2351 /* pr_pid */
2352 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2353
2354 /* pr_reg */
2355 offset = 72;
2356 size = 192;
2357
2358 break;
2359 }
2360
2361 /* Make a ".reg/999" section. */
2362 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2363 size, note->descpos + offset);
2364 }
2365
2366 static bfd_boolean
2367 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2368 {
2369 switch (note->descsz)
2370 {
2371 default:
2372 return FALSE;
2373
2374 case 128: /* Linux/PPC elf_prpsinfo. */
2375 elf_tdata (abfd)->core->pid
2376 = bfd_get_32 (abfd, note->descdata + 16);
2377 elf_tdata (abfd)->core->program
2378 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2379 elf_tdata (abfd)->core->command
2380 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2381 }
2382
2383 /* Note that for some reason, a spurious space is tacked
2384 onto the end of the args in some (at least one anyway)
2385 implementations, so strip it off if it exists. */
2386
2387 {
2388 char *command = elf_tdata (abfd)->core->command;
2389 int n = strlen (command);
2390
2391 if (0 < n && command[n - 1] == ' ')
2392 command[n - 1] = '\0';
2393 }
2394
2395 return TRUE;
2396 }
2397
2398 static char *
2399 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2400 {
2401 switch (note_type)
2402 {
2403 default:
2404 return NULL;
2405
2406 case NT_PRPSINFO:
2407 {
2408 char data[128] ATTRIBUTE_NONSTRING;
2409 va_list ap;
2410
2411 va_start (ap, note_type);
2412 memset (data, 0, sizeof (data));
2413 strncpy (data + 32, va_arg (ap, const char *), 16);
2414 DIAGNOSTIC_PUSH;
2415 /* GCC 8.1 warns about 80 equals destination size with
2416 -Wstringop-truncation:
2417 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
2418 */
2419 #if GCC_VERSION == 8001
2420 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
2421 #endif
2422 strncpy (data + 48, va_arg (ap, const char *), 80);
2423 DIAGNOSTIC_POP;
2424 va_end (ap);
2425 return elfcore_write_note (abfd, buf, bufsiz,
2426 "CORE", note_type, data, sizeof (data));
2427 }
2428
2429 case NT_PRSTATUS:
2430 {
2431 char data[268];
2432 va_list ap;
2433 long pid;
2434 int cursig;
2435 const void *greg;
2436
2437 va_start (ap, note_type);
2438 memset (data, 0, 72);
2439 pid = va_arg (ap, long);
2440 bfd_put_32 (abfd, pid, data + 24);
2441 cursig = va_arg (ap, int);
2442 bfd_put_16 (abfd, cursig, data + 12);
2443 greg = va_arg (ap, const void *);
2444 memcpy (data + 72, greg, 192);
2445 memset (data + 264, 0, 4);
2446 va_end (ap);
2447 return elfcore_write_note (abfd, buf, bufsiz,
2448 "CORE", note_type, data, sizeof (data));
2449 }
2450 }
2451 }
2452
2453 static flagword
2454 ppc_elf_lookup_section_flags (char *flag_name)
2455 {
2456
2457 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2458 return SHF_PPC_VLE;
2459
2460 return 0;
2461 }
2462
2463 /* Return address for Ith PLT stub in section PLT, for relocation REL
2464 or (bfd_vma) -1 if it should not be included. */
2465
2466 static bfd_vma
2467 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2468 const asection *plt ATTRIBUTE_UNUSED,
2469 const arelent *rel)
2470 {
2471 return rel->address;
2472 }
2473
2474 /* Handle a PowerPC specific section when reading an object file. This
2475 is called when bfd_section_from_shdr finds a section with an unknown
2476 type. */
2477
2478 static bfd_boolean
2479 ppc_elf_section_from_shdr (bfd *abfd,
2480 Elf_Internal_Shdr *hdr,
2481 const char *name,
2482 int shindex)
2483 {
2484 asection *newsect;
2485 flagword flags;
2486
2487 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2488 return FALSE;
2489
2490 newsect = hdr->bfd_section;
2491 flags = bfd_get_section_flags (abfd, newsect);
2492 if (hdr->sh_flags & SHF_EXCLUDE)
2493 flags |= SEC_EXCLUDE;
2494
2495 if (hdr->sh_type == SHT_ORDERED)
2496 flags |= SEC_SORT_ENTRIES;
2497
2498 bfd_set_section_flags (abfd, newsect, flags);
2499 return TRUE;
2500 }
2501
2502 /* Set up any other section flags and such that may be necessary. */
2503
2504 static bfd_boolean
2505 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2506 Elf_Internal_Shdr *shdr,
2507 asection *asect)
2508 {
2509 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2510 shdr->sh_type = SHT_ORDERED;
2511
2512 return TRUE;
2513 }
2514
2515 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2516 need to bump up the number of section headers. */
2517
2518 static int
2519 ppc_elf_additional_program_headers (bfd *abfd,
2520 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2521 {
2522 asection *s;
2523 int ret = 0;
2524
2525 s = bfd_get_section_by_name (abfd, ".sbss2");
2526 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2527 ++ret;
2528
2529 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2530 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2531 ++ret;
2532
2533 return ret;
2534 }
2535
2536 /* Modify the segment map for VLE executables. */
2537
2538 bfd_boolean
2539 ppc_elf_modify_segment_map (bfd *abfd,
2540 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2541 {
2542 struct elf_segment_map *m;
2543
2544 /* At this point in the link, output sections have already been sorted by
2545 LMA and assigned to segments. All that is left to do is to ensure
2546 there is no mixing of VLE & non-VLE sections in a text segment.
2547 If we find that case, we split the segment.
2548 We maintain the original output section order. */
2549
2550 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2551 {
2552 struct elf_segment_map *n;
2553 bfd_size_type amt;
2554 unsigned int j, k;
2555 unsigned int p_flags;
2556
2557 if (m->p_type != PT_LOAD || m->count == 0)
2558 continue;
2559
2560 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2561 {
2562 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2563 p_flags |= PF_W;
2564 if ((m->sections[j]->flags & SEC_CODE) != 0)
2565 {
2566 p_flags |= PF_X;
2567 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2568 p_flags |= PF_PPC_VLE;
2569 break;
2570 }
2571 }
2572 if (j != m->count)
2573 while (++j != m->count)
2574 {
2575 unsigned int p_flags1 = PF_R;
2576
2577 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2578 p_flags1 |= PF_W;
2579 if ((m->sections[j]->flags & SEC_CODE) != 0)
2580 {
2581 p_flags1 |= PF_X;
2582 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2583 p_flags1 |= PF_PPC_VLE;
2584 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2585 break;
2586 }
2587 p_flags |= p_flags1;
2588 }
2589 /* If we're splitting a segment which originally contained rw
2590 sections then those sections might now only be in one of the
2591 two parts. So always set p_flags if splitting, even if we
2592 are being called for objcopy with p_flags_valid set. */
2593 if (j != m->count || !m->p_flags_valid)
2594 {
2595 m->p_flags_valid = 1;
2596 m->p_flags = p_flags;
2597 }
2598 if (j == m->count)
2599 continue;
2600
2601 /* Sections 0..j-1 stay in this (current) segment,
2602 the remainder are put in a new segment.
2603 The scan resumes with the new segment. */
2604
2605 amt = sizeof (struct elf_segment_map);
2606 amt += (m->count - j - 1) * sizeof (asection *);
2607 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2608 if (n == NULL)
2609 return FALSE;
2610
2611 n->p_type = PT_LOAD;
2612 n->count = m->count - j;
2613 for (k = 0; k < n->count; ++k)
2614 n->sections[k] = m->sections[j + k];
2615 m->count = j;
2616 m->p_size_valid = 0;
2617 n->next = m->next;
2618 m->next = n;
2619 }
2620
2621 return TRUE;
2622 }
2623
2624 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2625 .PPC.EMB.sbss0 a normal section, and not a bss section so
2626 that the linker doesn't crater when trying to make more than
2627 2 sections. */
2628
2629 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2630 {
2631 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2632 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2633 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2634 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2635 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2636 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2637 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2638 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2639 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2640 { NULL, 0, 0, 0, 0 }
2641 };
2642
2643 /* This is what we want for new plt/got. */
2644 static struct bfd_elf_special_section ppc_alt_plt =
2645 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2646
2647 static const struct bfd_elf_special_section *
2648 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2649 {
2650 const struct bfd_elf_special_section *ssect;
2651
2652 /* See if this is one of the special sections. */
2653 if (sec->name == NULL)
2654 return NULL;
2655
2656 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2657 sec->use_rela_p);
2658 if (ssect != NULL)
2659 {
2660 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2661 ssect = &ppc_alt_plt;
2662 return ssect;
2663 }
2664
2665 return _bfd_elf_get_sec_type_attr (abfd, sec);
2666 }
2667 \f
2668 /* Very simple linked list structure for recording apuinfo values. */
2669 typedef struct apuinfo_list
2670 {
2671 struct apuinfo_list *next;
2672 unsigned long value;
2673 }
2674 apuinfo_list;
2675
2676 static apuinfo_list *head;
2677 static bfd_boolean apuinfo_set;
2678
2679 static void
2680 apuinfo_list_init (void)
2681 {
2682 head = NULL;
2683 apuinfo_set = FALSE;
2684 }
2685
2686 static void
2687 apuinfo_list_add (unsigned long value)
2688 {
2689 apuinfo_list *entry = head;
2690
2691 while (entry != NULL)
2692 {
2693 if (entry->value == value)
2694 return;
2695 entry = entry->next;
2696 }
2697
2698 entry = bfd_malloc (sizeof (* entry));
2699 if (entry == NULL)
2700 return;
2701
2702 entry->value = value;
2703 entry->next = head;
2704 head = entry;
2705 }
2706
2707 static unsigned
2708 apuinfo_list_length (void)
2709 {
2710 apuinfo_list *entry;
2711 unsigned long count;
2712
2713 for (entry = head, count = 0;
2714 entry;
2715 entry = entry->next)
2716 ++ count;
2717
2718 return count;
2719 }
2720
2721 static inline unsigned long
2722 apuinfo_list_element (unsigned long number)
2723 {
2724 apuinfo_list * entry;
2725
2726 for (entry = head;
2727 entry && number --;
2728 entry = entry->next)
2729 ;
2730
2731 return entry ? entry->value : 0;
2732 }
2733
2734 static void
2735 apuinfo_list_finish (void)
2736 {
2737 apuinfo_list *entry;
2738
2739 for (entry = head; entry;)
2740 {
2741 apuinfo_list *next = entry->next;
2742 free (entry);
2743 entry = next;
2744 }
2745
2746 head = NULL;
2747 }
2748
2749 /* Scan the input BFDs and create a linked list of
2750 the APUinfo values that will need to be emitted. */
2751
2752 static void
2753 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2754 {
2755 bfd *ibfd;
2756 asection *asec;
2757 char *buffer = NULL;
2758 bfd_size_type largest_input_size = 0;
2759 unsigned i;
2760 unsigned long length;
2761 const char *error_message = NULL;
2762
2763 if (link_info == NULL)
2764 return;
2765
2766 apuinfo_list_init ();
2767
2768 /* Read in the input sections contents. */
2769 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2770 {
2771 unsigned long datum;
2772
2773 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2774 if (asec == NULL)
2775 continue;
2776
2777 /* xgettext:c-format */
2778 error_message = _("corrupt %s section in %pB");
2779 length = asec->size;
2780 if (length < 20)
2781 goto fail;
2782
2783 apuinfo_set = TRUE;
2784 if (largest_input_size < asec->size)
2785 {
2786 if (buffer)
2787 free (buffer);
2788 largest_input_size = asec->size;
2789 buffer = bfd_malloc (largest_input_size);
2790 if (!buffer)
2791 return;
2792 }
2793
2794 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2795 || (bfd_bread (buffer, length, ibfd) != length))
2796 {
2797 /* xgettext:c-format */
2798 error_message = _("unable to read in %s section from %pB");
2799 goto fail;
2800 }
2801
2802 /* Verify the contents of the header. Note - we have to
2803 extract the values this way in order to allow for a
2804 host whose endian-ness is different from the target. */
2805 datum = bfd_get_32 (ibfd, buffer);
2806 if (datum != sizeof APUINFO_LABEL)
2807 goto fail;
2808
2809 datum = bfd_get_32 (ibfd, buffer + 8);
2810 if (datum != 0x2)
2811 goto fail;
2812
2813 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2814 goto fail;
2815
2816 /* Get the number of bytes used for apuinfo entries. */
2817 datum = bfd_get_32 (ibfd, buffer + 4);
2818 if (datum + 20 != length)
2819 goto fail;
2820
2821 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2822 for (i = 0; i < datum; i += 4)
2823 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2824 }
2825
2826 error_message = NULL;
2827
2828 if (apuinfo_set)
2829 {
2830 /* Compute the size of the output section. */
2831 unsigned num_entries = apuinfo_list_length ();
2832
2833 /* Set the output section size, if it exists. */
2834 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2835
2836 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2837 {
2838 ibfd = abfd;
2839 /* xgettext:c-format */
2840 error_message = _("warning: unable to set size of %s section in %pB");
2841 }
2842 }
2843
2844 fail:
2845 if (buffer)
2846 free (buffer);
2847
2848 if (error_message)
2849 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
2850 }
2851
2852 /* Prevent the output section from accumulating the input sections'
2853 contents. We have already stored this in our linked list structure. */
2854
2855 static bfd_boolean
2856 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2857 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2858 asection *asec,
2859 bfd_byte *contents ATTRIBUTE_UNUSED)
2860 {
2861 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2862 }
2863
2864 /* Finally we can generate the output section. */
2865
2866 static void
2867 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2868 {
2869 bfd_byte *buffer;
2870 asection *asec;
2871 unsigned i;
2872 unsigned num_entries;
2873 bfd_size_type length;
2874
2875 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2876 if (asec == NULL)
2877 return;
2878
2879 if (!apuinfo_set)
2880 return;
2881
2882 length = asec->size;
2883 if (length < 20)
2884 return;
2885
2886 buffer = bfd_malloc (length);
2887 if (buffer == NULL)
2888 {
2889 _bfd_error_handler
2890 (_("failed to allocate space for new APUinfo section"));
2891 return;
2892 }
2893
2894 /* Create the apuinfo header. */
2895 num_entries = apuinfo_list_length ();
2896 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2897 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2898 bfd_put_32 (abfd, 0x2, buffer + 8);
2899 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2900
2901 length = 20;
2902 for (i = 0; i < num_entries; i++)
2903 {
2904 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2905 length += 4;
2906 }
2907
2908 if (length != asec->size)
2909 _bfd_error_handler (_("failed to compute new APUinfo section"));
2910
2911 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2912 _bfd_error_handler (_("failed to install new APUinfo section"));
2913
2914 free (buffer);
2915
2916 apuinfo_list_finish ();
2917 }
2918 \f
2919 static bfd_boolean
2920 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2921 {
2922 bfd_byte buf[4 * 4];
2923
2924 if (!bfd_get_section_contents (abfd, glink, buf, off, sizeof buf))
2925 return FALSE;
2926
2927 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2928 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2929 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2930 && bfd_get_32 (abfd, buf + 12) == BCTR);
2931 }
2932
2933 static bfd_boolean
2934 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2935 {
2936 bfd_vma vma = *(bfd_vma *) ptr;
2937 return ((section->flags & SEC_ALLOC) != 0
2938 && section->vma <= vma
2939 && vma < section->vma + section->size);
2940 }
2941
2942 static long
2943 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2944 long dynsymcount, asymbol **dynsyms,
2945 asymbol **ret)
2946 {
2947 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2948 asection *plt, *relplt, *dynamic, *glink;
2949 bfd_vma glink_vma = 0;
2950 bfd_vma resolv_vma = 0;
2951 bfd_vma stub_off;
2952 asymbol *s;
2953 arelent *p;
2954 long count, i, stub_delta;
2955 size_t size;
2956 char *names;
2957 bfd_byte buf[4];
2958
2959 *ret = NULL;
2960
2961 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2962 return 0;
2963
2964 if (dynsymcount <= 0)
2965 return 0;
2966
2967 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2968 if (relplt == NULL)
2969 return 0;
2970
2971 plt = bfd_get_section_by_name (abfd, ".plt");
2972 if (plt == NULL)
2973 return 0;
2974
2975 /* Call common code to handle old-style executable PLTs. */
2976 if (elf_section_flags (plt) & SHF_EXECINSTR)
2977 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2978 dynsymcount, dynsyms, ret);
2979
2980 /* If this object was prelinked, the prelinker stored the address
2981 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2982 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2983 if (dynamic != NULL)
2984 {
2985 bfd_byte *dynbuf, *extdyn, *extdynend;
2986 size_t extdynsize;
2987 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2988
2989 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2990 return -1;
2991
2992 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2993 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2994
2995 extdyn = dynbuf;
2996 extdynend = extdyn + dynamic->size;
2997 for (; extdyn < extdynend; extdyn += extdynsize)
2998 {
2999 Elf_Internal_Dyn dyn;
3000 (*swap_dyn_in) (abfd, extdyn, &dyn);
3001
3002 if (dyn.d_tag == DT_NULL)
3003 break;
3004
3005 if (dyn.d_tag == DT_PPC_GOT)
3006 {
3007 unsigned int g_o_t = dyn.d_un.d_val;
3008 asection *got = bfd_get_section_by_name (abfd, ".got");
3009 if (got != NULL
3010 && bfd_get_section_contents (abfd, got, buf,
3011 g_o_t - got->vma + 4, 4))
3012 glink_vma = bfd_get_32 (abfd, buf);
3013 break;
3014 }
3015 }
3016 free (dynbuf);
3017 }
3018
3019 /* Otherwise we read the first plt entry. */
3020 if (glink_vma == 0)
3021 {
3022 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3023 glink_vma = bfd_get_32 (abfd, buf);
3024 }
3025
3026 if (glink_vma == 0)
3027 return 0;
3028
3029 /* The .glink section usually does not survive the final
3030 link; search for the section (usually .text) where the
3031 glink stubs now reside. */
3032 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3033 if (glink == NULL)
3034 return 0;
3035
3036 /* Determine glink PLT resolver by reading the relative branch
3037 from the first glink stub. */
3038 if (bfd_get_section_contents (abfd, glink, buf,
3039 glink_vma - glink->vma, 4))
3040 {
3041 unsigned int insn = bfd_get_32 (abfd, buf);
3042
3043 /* The first glink stub may either branch to the resolver ... */
3044 insn ^= B;
3045 if ((insn & ~0x3fffffc) == 0)
3046 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3047
3048 /* ... or fall through a bunch of NOPs. */
3049 else if ((insn ^ B ^ NOP) == 0)
3050 for (i = 4;
3051 bfd_get_section_contents (abfd, glink, buf,
3052 glink_vma - glink->vma + i, 4);
3053 i += 4)
3054 if (bfd_get_32 (abfd, buf) != NOP)
3055 {
3056 resolv_vma = glink_vma + i;
3057 break;
3058 }
3059 }
3060
3061 count = relplt->size / sizeof (Elf32_External_Rela);
3062 /* If the stubs are those for -shared/-pie then we might have
3063 multiple stubs for each plt entry. If that is the case then
3064 there is no way to associate stubs with their plt entries short
3065 of figuring out the GOT pointer value used in the stub.
3066 The offsets tested here need to cover all possible values of
3067 GLINK_ENTRY_SIZE for other than __tls_get_addr_opt. */
3068 stub_off = glink_vma - glink->vma;
3069 for (stub_delta = 16; stub_delta <= 32; stub_delta += 8)
3070 if (is_nonpic_glink_stub (abfd, glink, stub_off - stub_delta))
3071 break;
3072 if (stub_delta > 32)
3073 return 0;
3074
3075 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3076 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3077 return -1;
3078
3079 size = count * sizeof (asymbol);
3080 p = relplt->relocation;
3081 for (i = 0; i < count; i++, p++)
3082 {
3083 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3084 if (p->addend != 0)
3085 size += sizeof ("+0x") - 1 + 8;
3086 }
3087
3088 size += sizeof (asymbol) + sizeof ("__glink");
3089
3090 if (resolv_vma)
3091 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3092
3093 s = *ret = bfd_malloc (size);
3094 if (s == NULL)
3095 return -1;
3096
3097 stub_off = glink_vma - glink->vma;
3098 names = (char *) (s + count + 1 + (resolv_vma != 0));
3099 p = relplt->relocation + count - 1;
3100 for (i = 0; i < count; i++)
3101 {
3102 size_t len;
3103
3104 stub_off -= stub_delta;
3105 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3106 stub_off -= 32;
3107 *s = **p->sym_ptr_ptr;
3108 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3109 we are defining a symbol, ensure one of them is set. */
3110 if ((s->flags & BSF_LOCAL) == 0)
3111 s->flags |= BSF_GLOBAL;
3112 s->flags |= BSF_SYNTHETIC;
3113 s->section = glink;
3114 s->value = stub_off;
3115 s->name = names;
3116 s->udata.p = NULL;
3117 len = strlen ((*p->sym_ptr_ptr)->name);
3118 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3119 names += len;
3120 if (p->addend != 0)
3121 {
3122 memcpy (names, "+0x", sizeof ("+0x") - 1);
3123 names += sizeof ("+0x") - 1;
3124 bfd_sprintf_vma (abfd, names, p->addend);
3125 names += strlen (names);
3126 }
3127 memcpy (names, "@plt", sizeof ("@plt"));
3128 names += sizeof ("@plt");
3129 ++s;
3130 --p;
3131 }
3132
3133 /* Add a symbol at the start of the glink branch table. */
3134 memset (s, 0, sizeof *s);
3135 s->the_bfd = abfd;
3136 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3137 s->section = glink;
3138 s->value = glink_vma - glink->vma;
3139 s->name = names;
3140 memcpy (names, "__glink", sizeof ("__glink"));
3141 names += sizeof ("__glink");
3142 s++;
3143 count++;
3144
3145 if (resolv_vma)
3146 {
3147 /* Add a symbol for the glink PLT resolver. */
3148 memset (s, 0, sizeof *s);
3149 s->the_bfd = abfd;
3150 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3151 s->section = glink;
3152 s->value = resolv_vma - glink->vma;
3153 s->name = names;
3154 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3155 names += sizeof ("__glink_PLTresolve");
3156 s++;
3157 count++;
3158 }
3159
3160 return count;
3161 }
3162 \f
3163 /* The following functions are specific to the ELF linker, while
3164 functions above are used generally. They appear in this file more
3165 or less in the order in which they are called. eg.
3166 ppc_elf_check_relocs is called early in the link process,
3167 ppc_elf_finish_dynamic_sections is one of the last functions
3168 called. */
3169
3170 /* Track PLT entries needed for a given symbol. We might need more
3171 than one glink entry per symbol when generating a pic binary. */
3172 struct plt_entry
3173 {
3174 struct plt_entry *next;
3175
3176 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3177 This field stores the offset into .got2 used to initialise the
3178 GOT pointer reg. It will always be at least 32768. (Current
3179 gcc always uses an offset of 32768, but ld -r will pack .got2
3180 sections together resulting in larger offsets). */
3181 bfd_vma addend;
3182
3183 /* The .got2 section. */
3184 asection *sec;
3185
3186 /* PLT refcount or offset. */
3187 union
3188 {
3189 bfd_signed_vma refcount;
3190 bfd_vma offset;
3191 } plt;
3192
3193 /* .glink stub offset. */
3194 bfd_vma glink_offset;
3195 };
3196
3197 /* Of those relocs that might be copied as dynamic relocs, this
3198 function selects those that must be copied when linking a shared
3199 library or PIE, even when the symbol is local. */
3200
3201 static int
3202 must_be_dyn_reloc (struct bfd_link_info *info,
3203 enum elf_ppc_reloc_type r_type)
3204 {
3205 switch (r_type)
3206 {
3207 default:
3208 /* Only relative relocs can be resolved when the object load
3209 address isn't fixed. DTPREL32 is excluded because the
3210 dynamic linker needs to differentiate global dynamic from
3211 local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
3212 return 1;
3213
3214 case R_PPC_REL24:
3215 case R_PPC_REL14:
3216 case R_PPC_REL14_BRTAKEN:
3217 case R_PPC_REL14_BRNTAKEN:
3218 case R_PPC_REL32:
3219 return 0;
3220
3221 case R_PPC_TPREL32:
3222 case R_PPC_TPREL16:
3223 case R_PPC_TPREL16_LO:
3224 case R_PPC_TPREL16_HI:
3225 case R_PPC_TPREL16_HA:
3226 /* These relocations are relative but in a shared library the
3227 linker doesn't know the thread pointer base. */
3228 return bfd_link_dll (info);
3229 }
3230 }
3231
3232 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3233 copying dynamic variables from a shared lib into an app's dynbss
3234 section, and instead use a dynamic relocation to point into the
3235 shared lib. */
3236 #define ELIMINATE_COPY_RELOCS 1
3237
3238 /* Used to track dynamic relocations for local symbols. */
3239 struct ppc_dyn_relocs
3240 {
3241 struct ppc_dyn_relocs *next;
3242
3243 /* The input section of the reloc. */
3244 asection *sec;
3245
3246 /* Total number of relocs copied for the input section. */
3247 unsigned int count : 31;
3248
3249 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3250 unsigned int ifunc : 1;
3251 };
3252
3253 /* PPC ELF linker hash entry. */
3254
3255 struct ppc_elf_link_hash_entry
3256 {
3257 struct elf_link_hash_entry elf;
3258
3259 /* If this symbol is used in the linker created sections, the processor
3260 specific backend uses this field to map the field into the offset
3261 from the beginning of the section. */
3262 elf_linker_section_pointers_t *linker_section_pointer;
3263
3264 /* Track dynamic relocs copied for this symbol. */
3265 struct elf_dyn_relocs *dyn_relocs;
3266
3267 /* Contexts in which symbol is used in the GOT.
3268 Bits are or'd into the mask as the corresponding relocs are
3269 encountered during check_relocs, with TLS_TLS being set when any
3270 of the other TLS bits are set. tls_optimize clears bits when
3271 optimizing to indicate the corresponding GOT entry type is not
3272 needed. If set, TLS_TLS is never cleared. tls_optimize may also
3273 set TLS_TPRELGD when a GD reloc turns into a TPREL one. We use a
3274 separate flag rather than setting TPREL just for convenience in
3275 distinguishing the two cases.
3276 These flags are also kept for local symbols. */
3277 #define TLS_TLS 1 /* Any TLS reloc. */
3278 #define TLS_GD 2 /* GD reloc. */
3279 #define TLS_LD 4 /* LD reloc. */
3280 #define TLS_TPREL 8 /* TPREL reloc, => IE. */
3281 #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */
3282 #define TLS_MARK 32 /* __tls_get_addr call marked. */
3283 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3284 unsigned char tls_mask;
3285
3286 /* The above field is also used to mark function symbols. In which
3287 case TLS_TLS will be 0. */
3288 #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */
3289 #define PLT_KEEP 4 /* inline plt call requires plt entry. */
3290 #define NON_GOT 256 /* local symbol plt, not stored. */
3291
3292 /* Nonzero if we have seen a small data relocation referring to this
3293 symbol. */
3294 unsigned char has_sda_refs : 1;
3295
3296 /* Flag use of given relocations. */
3297 unsigned char has_addr16_ha : 1;
3298 unsigned char has_addr16_lo : 1;
3299 };
3300
3301 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3302
3303 /* PPC ELF linker hash table. */
3304
3305 struct ppc_elf_link_hash_table
3306 {
3307 struct elf_link_hash_table elf;
3308
3309 /* Various options passed from the linker. */
3310 struct ppc_elf_params *params;
3311
3312 /* Short-cuts to get to dynamic linker sections. */
3313 asection *glink;
3314 asection *dynsbss;
3315 asection *relsbss;
3316 elf_linker_section_t sdata[2];
3317 asection *sbss;
3318 asection *glink_eh_frame;
3319 asection *pltlocal;
3320 asection *relpltlocal;
3321
3322 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3323 asection *srelplt2;
3324
3325 /* Shortcut to __tls_get_addr. */
3326 struct elf_link_hash_entry *tls_get_addr;
3327
3328 /* The bfd that forced an old-style PLT. */
3329 bfd *old_bfd;
3330
3331 /* TLS local dynamic got entry handling. */
3332 union {
3333 bfd_signed_vma refcount;
3334 bfd_vma offset;
3335 } tlsld_got;
3336
3337 /* Offset of branch table to PltResolve function in glink. */
3338 bfd_vma glink_pltresolve;
3339
3340 /* Size of reserved GOT entries. */
3341 unsigned int got_header_size;
3342 /* Non-zero if allocating the header left a gap. */
3343 unsigned int got_gap;
3344
3345 /* The type of PLT we have chosen to use. */
3346 enum ppc_elf_plt_type plt_type;
3347
3348 /* True if the target system is VxWorks. */
3349 unsigned int is_vxworks:1;
3350
3351 /* Whether there exist local gnu indirect function resolvers,
3352 referenced by dynamic relocations. */
3353 unsigned int local_ifunc_resolver:1;
3354 unsigned int maybe_local_ifunc_resolver:1;
3355
3356 /* Set if tls optimization is enabled. */
3357 unsigned int do_tls_opt:1;
3358
3359 /* Set if inline plt calls should be converted to direct calls. */
3360 unsigned int can_convert_all_inline_plt:1;
3361
3362 /* The size of PLT entries. */
3363 int plt_entry_size;
3364 /* The distance between adjacent PLT slots. */
3365 int plt_slot_size;
3366 /* The size of the first PLT entry. */
3367 int plt_initial_entry_size;
3368
3369 /* Small local sym cache. */
3370 struct sym_cache sym_cache;
3371 };
3372
3373 /* Rename some of the generic section flags to better document how they
3374 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3375
3376 /* Nonzero if this section has TLS related relocations. */
3377 #define has_tls_reloc sec_flg0
3378
3379 /* Nonzero if this section has a call to __tls_get_addr. */
3380 #define has_tls_get_addr_call sec_flg1
3381
3382 /* Flag set when PLTCALL relocs are detected. */
3383 #define has_pltcall sec_flg2
3384
3385 /* Get the PPC ELF linker hash table from a link_info structure. */
3386
3387 #define ppc_elf_hash_table(p) \
3388 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3389 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3390
3391 /* Create an entry in a PPC ELF linker hash table. */
3392
3393 static struct bfd_hash_entry *
3394 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3395 struct bfd_hash_table *table,
3396 const char *string)
3397 {
3398 /* Allocate the structure if it has not already been allocated by a
3399 subclass. */
3400 if (entry == NULL)
3401 {
3402 entry = bfd_hash_allocate (table,
3403 sizeof (struct ppc_elf_link_hash_entry));
3404 if (entry == NULL)
3405 return entry;
3406 }
3407
3408 /* Call the allocation method of the superclass. */
3409 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3410 if (entry != NULL)
3411 {
3412 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3413 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3414 ppc_elf_hash_entry (entry)->tls_mask = 0;
3415 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3416 }
3417
3418 return entry;
3419 }
3420
3421 /* Create a PPC ELF linker hash table. */
3422
3423 static struct bfd_link_hash_table *
3424 ppc_elf_link_hash_table_create (bfd *abfd)
3425 {
3426 struct ppc_elf_link_hash_table *ret;
3427 static struct ppc_elf_params default_params
3428 = { PLT_OLD, 0, 0, 1, 0, 0, 12, 0, 0, 0 };
3429
3430 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3431 if (ret == NULL)
3432 return NULL;
3433
3434 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3435 ppc_elf_link_hash_newfunc,
3436 sizeof (struct ppc_elf_link_hash_entry),
3437 PPC32_ELF_DATA))
3438 {
3439 free (ret);
3440 return NULL;
3441 }
3442
3443 ret->elf.init_plt_refcount.refcount = 0;
3444 ret->elf.init_plt_refcount.glist = NULL;
3445 ret->elf.init_plt_offset.offset = 0;
3446 ret->elf.init_plt_offset.glist = NULL;
3447
3448 ret->params = &default_params;
3449
3450 ret->sdata[0].name = ".sdata";
3451 ret->sdata[0].sym_name = "_SDA_BASE_";
3452 ret->sdata[0].bss_name = ".sbss";
3453
3454 ret->sdata[1].name = ".sdata2";
3455 ret->sdata[1].sym_name = "_SDA2_BASE_";
3456 ret->sdata[1].bss_name = ".sbss2";
3457
3458 ret->plt_entry_size = 12;
3459 ret->plt_slot_size = 8;
3460 ret->plt_initial_entry_size = 72;
3461
3462 return &ret->elf.root;
3463 }
3464
3465 /* Hook linker params into hash table. */
3466
3467 void
3468 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3469 {
3470 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3471
3472 if (htab)
3473 htab->params = params;
3474 params->pagesize_p2 = bfd_log2 (params->pagesize);
3475 }
3476
3477 /* Create .got and the related sections. */
3478
3479 static bfd_boolean
3480 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3481 {
3482 struct ppc_elf_link_hash_table *htab;
3483
3484 if (!_bfd_elf_create_got_section (abfd, info))
3485 return FALSE;
3486
3487 htab = ppc_elf_hash_table (info);
3488 if (!htab->is_vxworks)
3489 {
3490 /* The powerpc .got has a blrl instruction in it. Mark it
3491 executable. */
3492 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3493 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3494 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3495 return FALSE;
3496 }
3497
3498 return TRUE;
3499 }
3500
3501 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3502 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3503 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3504
3505 static bfd_boolean
3506 ppc_elf_create_linker_section (bfd *abfd,
3507 struct bfd_link_info *info,
3508 flagword flags,
3509 elf_linker_section_t *lsect)
3510 {
3511 asection *s;
3512
3513 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3514 | SEC_LINKER_CREATED);
3515
3516 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3517 if (s == NULL)
3518 return FALSE;
3519 lsect->section = s;
3520
3521 /* Define the sym on the first section of this name. */
3522 s = bfd_get_section_by_name (abfd, lsect->name);
3523
3524 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3525 if (lsect->sym == NULL)
3526 return FALSE;
3527 lsect->sym->root.u.def.value = 0x8000;
3528 return TRUE;
3529 }
3530
3531 static bfd_boolean
3532 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3533 {
3534 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3535 asection *s;
3536 flagword flags;
3537 int p2align;
3538
3539 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3540 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3541 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3542 htab->glink = s;
3543 p2align = htab->params->ppc476_workaround ? 6 : 4;
3544 if (p2align < htab->params->plt_stub_align)
3545 p2align = htab->params->plt_stub_align;
3546 if (s == NULL
3547 || !bfd_set_section_alignment (abfd, s, p2align))
3548 return FALSE;
3549
3550 if (!info->no_ld_generated_unwind_info)
3551 {
3552 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3553 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3554 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3555 htab->glink_eh_frame = s;
3556 if (s == NULL
3557 || !bfd_set_section_alignment (abfd, s, 2))
3558 return FALSE;
3559 }
3560
3561 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3562 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3563 htab->elf.iplt = s;
3564 if (s == NULL
3565 || !bfd_set_section_alignment (abfd, s, 4))
3566 return FALSE;
3567
3568 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3569 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3570 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3571 htab->elf.irelplt = s;
3572 if (s == NULL
3573 || ! bfd_set_section_alignment (abfd, s, 2))
3574 return FALSE;
3575
3576 /* Local plt entries. */
3577 flags = (SEC_ALLOC | SEC_LOAD
3578 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3579 htab->pltlocal = bfd_make_section_anyway_with_flags (abfd, ".branch_lt",
3580 flags);
3581 if (htab->pltlocal == NULL
3582 || ! bfd_set_section_alignment (abfd, htab->pltlocal, 2))
3583 return FALSE;
3584
3585 if (bfd_link_pic (info))
3586 {
3587 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3588 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3589 htab->relpltlocal
3590 = bfd_make_section_anyway_with_flags (abfd, ".rela.branch_lt", flags);
3591 if (htab->relpltlocal == NULL
3592 || ! bfd_set_section_alignment (abfd, htab->relpltlocal, 2))
3593 return FALSE;
3594 }
3595
3596 if (!ppc_elf_create_linker_section (abfd, info, 0,
3597 &htab->sdata[0]))
3598 return FALSE;
3599
3600 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3601 &htab->sdata[1]))
3602 return FALSE;
3603
3604 return TRUE;
3605 }
3606
3607 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3608 to output sections (just like _bfd_elf_create_dynamic_sections has
3609 to create .dynbss and .rela.bss). */
3610
3611 static bfd_boolean
3612 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3613 {
3614 struct ppc_elf_link_hash_table *htab;
3615 asection *s;
3616 flagword flags;
3617
3618 htab = ppc_elf_hash_table (info);
3619
3620 if (htab->elf.sgot == NULL
3621 && !ppc_elf_create_got (abfd, info))
3622 return FALSE;
3623
3624 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3625 return FALSE;
3626
3627 if (htab->glink == NULL
3628 && !ppc_elf_create_glink (abfd, info))
3629 return FALSE;
3630
3631 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3632 SEC_ALLOC | SEC_LINKER_CREATED);
3633 htab->dynsbss = s;
3634 if (s == NULL)
3635 return FALSE;
3636
3637 if (! bfd_link_pic (info))
3638 {
3639 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3640 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3641 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3642 htab->relsbss = s;
3643 if (s == NULL
3644 || ! bfd_set_section_alignment (abfd, s, 2))
3645 return FALSE;
3646 }
3647
3648 if (htab->is_vxworks
3649 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3650 return FALSE;
3651
3652 s = htab->elf.splt;
3653 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3654 if (htab->plt_type == PLT_VXWORKS)
3655 /* The VxWorks PLT is a loaded section with contents. */
3656 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3657 return bfd_set_section_flags (abfd, s, flags);
3658 }
3659
3660 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3661
3662 static void
3663 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3664 struct elf_link_hash_entry *dir,
3665 struct elf_link_hash_entry *ind)
3666 {
3667 struct ppc_elf_link_hash_entry *edir, *eind;
3668
3669 edir = (struct ppc_elf_link_hash_entry *) dir;
3670 eind = (struct ppc_elf_link_hash_entry *) ind;
3671
3672 edir->tls_mask |= eind->tls_mask;
3673 edir->has_sda_refs |= eind->has_sda_refs;
3674
3675 if (edir->elf.versioned != versioned_hidden)
3676 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3677 edir->elf.ref_regular |= eind->elf.ref_regular;
3678 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3679 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3680 edir->elf.needs_plt |= eind->elf.needs_plt;
3681 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3682
3683 /* If we were called to copy over info for a weak sym, that's all. */
3684 if (eind->elf.root.type != bfd_link_hash_indirect)
3685 return;
3686
3687 if (eind->dyn_relocs != NULL)
3688 {
3689 if (edir->dyn_relocs != NULL)
3690 {
3691 struct elf_dyn_relocs **pp;
3692 struct elf_dyn_relocs *p;
3693
3694 /* Add reloc counts against the indirect sym to the direct sym
3695 list. Merge any entries against the same section. */
3696 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3697 {
3698 struct elf_dyn_relocs *q;
3699
3700 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3701 if (q->sec == p->sec)
3702 {
3703 q->pc_count += p->pc_count;
3704 q->count += p->count;
3705 *pp = p->next;
3706 break;
3707 }
3708 if (q == NULL)
3709 pp = &p->next;
3710 }
3711 *pp = edir->dyn_relocs;
3712 }
3713
3714 edir->dyn_relocs = eind->dyn_relocs;
3715 eind->dyn_relocs = NULL;
3716 }
3717
3718 /* Copy over the GOT refcount entries that we may have already seen to
3719 the symbol which just became indirect. */
3720 edir->elf.got.refcount += eind->elf.got.refcount;
3721 eind->elf.got.refcount = 0;
3722
3723 /* And plt entries. */
3724 if (eind->elf.plt.plist != NULL)
3725 {
3726 if (edir->elf.plt.plist != NULL)
3727 {
3728 struct plt_entry **entp;
3729 struct plt_entry *ent;
3730
3731 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3732 {
3733 struct plt_entry *dent;
3734
3735 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3736 if (dent->sec == ent->sec && dent->addend == ent->addend)
3737 {
3738 dent->plt.refcount += ent->plt.refcount;
3739 *entp = ent->next;
3740 break;
3741 }
3742 if (dent == NULL)
3743 entp = &ent->next;
3744 }
3745 *entp = edir->elf.plt.plist;
3746 }
3747
3748 edir->elf.plt.plist = eind->elf.plt.plist;
3749 eind->elf.plt.plist = NULL;
3750 }
3751
3752 if (eind->elf.dynindx != -1)
3753 {
3754 if (edir->elf.dynindx != -1)
3755 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3756 edir->elf.dynstr_index);
3757 edir->elf.dynindx = eind->elf.dynindx;
3758 edir->elf.dynstr_index = eind->elf.dynstr_index;
3759 eind->elf.dynindx = -1;
3760 eind->elf.dynstr_index = 0;
3761 }
3762 }
3763
3764 /* Hook called by the linker routine which adds symbols from an object
3765 file. We use it to put .comm items in .sbss, and not .bss. */
3766
3767 static bfd_boolean
3768 ppc_elf_add_symbol_hook (bfd *abfd,
3769 struct bfd_link_info *info,
3770 Elf_Internal_Sym *sym,
3771 const char **namep ATTRIBUTE_UNUSED,
3772 flagword *flagsp ATTRIBUTE_UNUSED,
3773 asection **secp,
3774 bfd_vma *valp)
3775 {
3776 if (sym->st_shndx == SHN_COMMON
3777 && !bfd_link_relocatable (info)
3778 && is_ppc_elf (info->output_bfd)
3779 && sym->st_size <= elf_gp_size (abfd))
3780 {
3781 /* Common symbols less than or equal to -G nn bytes are automatically
3782 put into .sbss. */
3783 struct ppc_elf_link_hash_table *htab;
3784
3785 htab = ppc_elf_hash_table (info);
3786 if (htab->sbss == NULL)
3787 {
3788 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3789
3790 if (!htab->elf.dynobj)
3791 htab->elf.dynobj = abfd;
3792
3793 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3794 ".sbss",
3795 flags);
3796 if (htab->sbss == NULL)
3797 return FALSE;
3798 }
3799
3800 *secp = htab->sbss;
3801 *valp = sym->st_size;
3802 }
3803
3804 return TRUE;
3805 }
3806 \f
3807 /* Find a linker generated pointer with a given addend and type. */
3808
3809 static elf_linker_section_pointers_t *
3810 elf_find_pointer_linker_section
3811 (elf_linker_section_pointers_t *linker_pointers,
3812 bfd_vma addend,
3813 elf_linker_section_t *lsect)
3814 {
3815 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3816 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3817 return linker_pointers;
3818
3819 return NULL;
3820 }
3821
3822 /* Allocate a pointer to live in a linker created section. */
3823
3824 static bfd_boolean
3825 elf_allocate_pointer_linker_section (bfd *abfd,
3826 elf_linker_section_t *lsect,
3827 struct elf_link_hash_entry *h,
3828 const Elf_Internal_Rela *rel)
3829 {
3830 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3831 elf_linker_section_pointers_t *linker_section_ptr;
3832 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3833 bfd_size_type amt;
3834
3835 BFD_ASSERT (lsect != NULL);
3836
3837 /* Is this a global symbol? */
3838 if (h != NULL)
3839 {
3840 struct ppc_elf_link_hash_entry *eh;
3841
3842 /* Has this symbol already been allocated? If so, our work is done. */
3843 eh = (struct ppc_elf_link_hash_entry *) h;
3844 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3845 rel->r_addend,
3846 lsect))
3847 return TRUE;
3848
3849 ptr_linker_section_ptr = &eh->linker_section_pointer;
3850 }
3851 else
3852 {
3853 BFD_ASSERT (is_ppc_elf (abfd));
3854
3855 /* Allocation of a pointer to a local symbol. */
3856 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3857
3858 /* Allocate a table to hold the local symbols if first time. */
3859 if (!ptr)
3860 {
3861 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3862
3863 amt = num_symbols;
3864 amt *= sizeof (elf_linker_section_pointers_t *);
3865 ptr = bfd_zalloc (abfd, amt);
3866
3867 if (!ptr)
3868 return FALSE;
3869
3870 elf_local_ptr_offsets (abfd) = ptr;
3871 }
3872
3873 /* Has this symbol already been allocated? If so, our work is done. */
3874 if (elf_find_pointer_linker_section (ptr[r_symndx],
3875 rel->r_addend,
3876 lsect))
3877 return TRUE;
3878
3879 ptr_linker_section_ptr = &ptr[r_symndx];
3880 }
3881
3882 /* Allocate space for a pointer in the linker section, and allocate
3883 a new pointer record from internal memory. */
3884 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3885 amt = sizeof (elf_linker_section_pointers_t);
3886 linker_section_ptr = bfd_alloc (abfd, amt);
3887
3888 if (!linker_section_ptr)
3889 return FALSE;
3890
3891 linker_section_ptr->next = *ptr_linker_section_ptr;
3892 linker_section_ptr->addend = rel->r_addend;
3893 linker_section_ptr->lsect = lsect;
3894 *ptr_linker_section_ptr = linker_section_ptr;
3895
3896 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3897 return FALSE;
3898 linker_section_ptr->offset = lsect->section->size;
3899 lsect->section->size += 4;
3900
3901 #ifdef DEBUG
3902 fprintf (stderr,
3903 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3904 lsect->name, (long) linker_section_ptr->offset,
3905 (long) lsect->section->size);
3906 #endif
3907
3908 return TRUE;
3909 }
3910
3911 static struct plt_entry **
3912 update_local_sym_info (bfd *abfd,
3913 Elf_Internal_Shdr *symtab_hdr,
3914 unsigned long r_symndx,
3915 int tls_type)
3916 {
3917 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3918 struct plt_entry **local_plt;
3919 unsigned char *local_got_tls_masks;
3920
3921 if (local_got_refcounts == NULL)
3922 {
3923 bfd_size_type size = symtab_hdr->sh_info;
3924
3925 size *= (sizeof (*local_got_refcounts)
3926 + sizeof (*local_plt)
3927 + sizeof (*local_got_tls_masks));
3928 local_got_refcounts = bfd_zalloc (abfd, size);
3929 if (local_got_refcounts == NULL)
3930 return NULL;
3931 elf_local_got_refcounts (abfd) = local_got_refcounts;
3932 }
3933
3934 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3935 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
3936 local_got_tls_masks[r_symndx] |= tls_type & 0xff;
3937 if ((tls_type & NON_GOT) == 0)
3938 local_got_refcounts[r_symndx] += 1;
3939 return local_plt + r_symndx;
3940 }
3941
3942 static bfd_boolean
3943 update_plt_info (bfd *abfd, struct plt_entry **plist,
3944 asection *sec, bfd_vma addend)
3945 {
3946 struct plt_entry *ent;
3947
3948 if (addend < 32768)
3949 sec = NULL;
3950 for (ent = *plist; ent != NULL; ent = ent->next)
3951 if (ent->sec == sec && ent->addend == addend)
3952 break;
3953 if (ent == NULL)
3954 {
3955 bfd_size_type amt = sizeof (*ent);
3956 ent = bfd_alloc (abfd, amt);
3957 if (ent == NULL)
3958 return FALSE;
3959 ent->next = *plist;
3960 ent->sec = sec;
3961 ent->addend = addend;
3962 ent->plt.refcount = 0;
3963 *plist = ent;
3964 }
3965 ent->plt.refcount += 1;
3966 return TRUE;
3967 }
3968
3969 static struct plt_entry *
3970 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3971 {
3972 struct plt_entry *ent;
3973
3974 if (addend < 32768)
3975 sec = NULL;
3976 for (ent = *plist; ent != NULL; ent = ent->next)
3977 if (ent->sec == sec && ent->addend == addend)
3978 break;
3979 return ent;
3980 }
3981
3982 static bfd_boolean
3983 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3984 {
3985 return (r_type == R_PPC_PLTREL24
3986 || r_type == R_PPC_LOCAL24PC
3987 || r_type == R_PPC_REL24
3988 || r_type == R_PPC_REL14
3989 || r_type == R_PPC_REL14_BRTAKEN
3990 || r_type == R_PPC_REL14_BRNTAKEN
3991 || r_type == R_PPC_ADDR24
3992 || r_type == R_PPC_ADDR14
3993 || r_type == R_PPC_ADDR14_BRTAKEN
3994 || r_type == R_PPC_ADDR14_BRNTAKEN
3995 || r_type == R_PPC_VLE_REL24);
3996 }
3997
3998 /* Relocs on inline plt call sequence insns prior to the call. */
3999
4000 static bfd_boolean
4001 is_plt_seq_reloc (enum elf_ppc_reloc_type r_type)
4002 {
4003 return (r_type == R_PPC_PLT16_HA
4004 || r_type == R_PPC_PLT16_HI
4005 || r_type == R_PPC_PLT16_LO
4006 || r_type == R_PPC_PLTSEQ);
4007 }
4008
4009 static void
4010 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
4011 {
4012 _bfd_error_handler
4013 /* xgettext:c-format */
4014 (_("%pB: relocation %s cannot be used when making a shared object"),
4015 abfd,
4016 ppc_elf_howto_table[r_type]->name);
4017 bfd_set_error (bfd_error_bad_value);
4018 }
4019
4020 /* Look through the relocs for a section during the first phase, and
4021 allocate space in the global offset table or procedure linkage
4022 table. */
4023
4024 static bfd_boolean
4025 ppc_elf_check_relocs (bfd *abfd,
4026 struct bfd_link_info *info,
4027 asection *sec,
4028 const Elf_Internal_Rela *relocs)
4029 {
4030 struct ppc_elf_link_hash_table *htab;
4031 Elf_Internal_Shdr *symtab_hdr;
4032 struct elf_link_hash_entry **sym_hashes;
4033 const Elf_Internal_Rela *rel;
4034 const Elf_Internal_Rela *rel_end;
4035 asection *got2, *sreloc;
4036 struct elf_link_hash_entry *tga;
4037
4038 if (bfd_link_relocatable (info))
4039 return TRUE;
4040
4041 /* Don't do anything special with non-loaded, non-alloced sections.
4042 In particular, any relocs in such sections should not affect GOT
4043 and PLT reference counting (ie. we don't allow them to create GOT
4044 or PLT entries), there's no possibility or desire to optimize TLS
4045 relocs, and there's not much point in propagating relocs to shared
4046 libs that the dynamic linker won't relocate. */
4047 if ((sec->flags & SEC_ALLOC) == 0)
4048 return TRUE;
4049
4050 #ifdef DEBUG
4051 _bfd_error_handler ("ppc_elf_check_relocs called for section %pA in %pB",
4052 sec, abfd);
4053 #endif
4054
4055 BFD_ASSERT (is_ppc_elf (abfd));
4056
4057 /* Initialize howto table if not already done. */
4058 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4059 ppc_elf_howto_init ();
4060
4061 htab = ppc_elf_hash_table (info);
4062 if (htab->glink == NULL)
4063 {
4064 if (htab->elf.dynobj == NULL)
4065 htab->elf.dynobj = abfd;
4066 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4067 return FALSE;
4068 }
4069 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4070 FALSE, FALSE, TRUE);
4071 symtab_hdr = &elf_symtab_hdr (abfd);
4072 sym_hashes = elf_sym_hashes (abfd);
4073 got2 = bfd_get_section_by_name (abfd, ".got2");
4074 sreloc = NULL;
4075
4076 rel_end = relocs + sec->reloc_count;
4077 for (rel = relocs; rel < rel_end; rel++)
4078 {
4079 unsigned long r_symndx;
4080 enum elf_ppc_reloc_type r_type;
4081 struct elf_link_hash_entry *h;
4082 int tls_type;
4083 struct plt_entry **ifunc;
4084 struct plt_entry **pltent;
4085 bfd_vma addend;
4086
4087 r_symndx = ELF32_R_SYM (rel->r_info);
4088 if (r_symndx < symtab_hdr->sh_info)
4089 h = NULL;
4090 else
4091 {
4092 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4093 while (h->root.type == bfd_link_hash_indirect
4094 || h->root.type == bfd_link_hash_warning)
4095 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4096 }
4097
4098 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4099 This shows up in particular in an R_PPC_ADDR32 in the eabi
4100 startup code. */
4101 if (h != NULL
4102 && htab->elf.sgot == NULL
4103 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4104 {
4105 if (htab->elf.dynobj == NULL)
4106 htab->elf.dynobj = abfd;
4107 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4108 return FALSE;
4109 BFD_ASSERT (h == htab->elf.hgot);
4110 }
4111
4112 tls_type = 0;
4113 r_type = ELF32_R_TYPE (rel->r_info);
4114 ifunc = NULL;
4115 if (h == NULL && !htab->is_vxworks)
4116 {
4117 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4118 abfd, r_symndx);
4119 if (isym == NULL)
4120 return FALSE;
4121
4122 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4123 {
4124 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4125 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4126 NON_GOT | PLT_IFUNC);
4127 if (ifunc == NULL)
4128 return FALSE;
4129
4130 /* STT_GNU_IFUNC symbols must have a PLT entry;
4131 In a non-pie executable even when there are
4132 no plt calls. */
4133 if (!bfd_link_pic (info)
4134 || is_branch_reloc (r_type)
4135 || r_type == R_PPC_PLT16_LO
4136 || r_type == R_PPC_PLT16_HI
4137 || r_type == R_PPC_PLT16_HA)
4138 {
4139 addend = 0;
4140 if (r_type == R_PPC_PLTREL24)
4141 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4142 if (bfd_link_pic (info)
4143 && (r_type == R_PPC_PLTREL24
4144 || r_type == R_PPC_PLT16_LO
4145 || r_type == R_PPC_PLT16_HI
4146 || r_type == R_PPC_PLT16_HA))
4147 addend = rel->r_addend;
4148 if (!update_plt_info (abfd, ifunc, got2, addend))
4149 return FALSE;
4150 }
4151 }
4152 }
4153
4154 if (!htab->is_vxworks
4155 && is_branch_reloc (r_type)
4156 && h != NULL
4157 && h == tga)
4158 {
4159 if (rel != relocs
4160 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4161 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4162 /* We have a new-style __tls_get_addr call with a marker
4163 reloc. */
4164 ;
4165 else
4166 /* Mark this section as having an old-style call. */
4167 sec->has_tls_get_addr_call = 1;
4168 }
4169
4170 switch (r_type)
4171 {
4172 case R_PPC_TLSGD:
4173 case R_PPC_TLSLD:
4174 /* These special tls relocs tie a call to __tls_get_addr with
4175 its parameter symbol. */
4176 if (h != NULL)
4177 ppc_elf_hash_entry (h)->tls_mask |= TLS_TLS | TLS_MARK;
4178 else
4179 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4180 NON_GOT | TLS_TLS | TLS_MARK))
4181 return FALSE;
4182 break;
4183
4184 case R_PPC_PLTSEQ:
4185 break;
4186
4187 case R_PPC_GOT_TLSLD16:
4188 case R_PPC_GOT_TLSLD16_LO:
4189 case R_PPC_GOT_TLSLD16_HI:
4190 case R_PPC_GOT_TLSLD16_HA:
4191 tls_type = TLS_TLS | TLS_LD;
4192 goto dogottls;
4193
4194 case R_PPC_GOT_TLSGD16:
4195 case R_PPC_GOT_TLSGD16_LO:
4196 case R_PPC_GOT_TLSGD16_HI:
4197 case R_PPC_GOT_TLSGD16_HA:
4198 tls_type = TLS_TLS | TLS_GD;
4199 goto dogottls;
4200
4201 case R_PPC_GOT_TPREL16:
4202 case R_PPC_GOT_TPREL16_LO:
4203 case R_PPC_GOT_TPREL16_HI:
4204 case R_PPC_GOT_TPREL16_HA:
4205 if (bfd_link_dll (info))
4206 info->flags |= DF_STATIC_TLS;
4207 tls_type = TLS_TLS | TLS_TPREL;
4208 goto dogottls;
4209
4210 case R_PPC_GOT_DTPREL16:
4211 case R_PPC_GOT_DTPREL16_LO:
4212 case R_PPC_GOT_DTPREL16_HI:
4213 case R_PPC_GOT_DTPREL16_HA:
4214 tls_type = TLS_TLS | TLS_DTPREL;
4215 dogottls:
4216 sec->has_tls_reloc = 1;
4217 /* Fall through. */
4218
4219 /* GOT16 relocations */
4220 case R_PPC_GOT16:
4221 case R_PPC_GOT16_LO:
4222 case R_PPC_GOT16_HI:
4223 case R_PPC_GOT16_HA:
4224 /* This symbol requires a global offset table entry. */
4225 if (htab->elf.sgot == NULL)
4226 {
4227 if (htab->elf.dynobj == NULL)
4228 htab->elf.dynobj = abfd;
4229 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4230 return FALSE;
4231 }
4232 if (h != NULL)
4233 {
4234 h->got.refcount += 1;
4235 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4236 }
4237 else
4238 /* This is a global offset table entry for a local symbol. */
4239 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4240 return FALSE;
4241
4242 /* We may also need a plt entry if the symbol turns out to be
4243 an ifunc. */
4244 if (h != NULL && !bfd_link_pic (info))
4245 {
4246 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4247 return FALSE;
4248 }
4249 break;
4250
4251 /* Indirect .sdata relocation. */
4252 case R_PPC_EMB_SDAI16:
4253 if (bfd_link_pic (info))
4254 {
4255 bad_shared_reloc (abfd, r_type);
4256 return FALSE;
4257 }
4258 htab->sdata[0].sym->ref_regular = 1;
4259 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4260 h, rel))
4261 return FALSE;
4262 if (h != NULL)
4263 {
4264 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4265 h->non_got_ref = TRUE;
4266 }
4267 break;
4268
4269 /* Indirect .sdata2 relocation. */
4270 case R_PPC_EMB_SDA2I16:
4271 if (bfd_link_pic (info))
4272 {
4273 bad_shared_reloc (abfd, r_type);
4274 return FALSE;
4275 }
4276 htab->sdata[1].sym->ref_regular = 1;
4277 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4278 h, rel))
4279 return FALSE;
4280 if (h != NULL)
4281 {
4282 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4283 h->non_got_ref = TRUE;
4284 }
4285 break;
4286
4287 case R_PPC_SDAREL16:
4288 htab->sdata[0].sym->ref_regular = 1;
4289 /* Fall through. */
4290
4291 case R_PPC_VLE_SDAREL_LO16A:
4292 case R_PPC_VLE_SDAREL_LO16D:
4293 case R_PPC_VLE_SDAREL_HI16A:
4294 case R_PPC_VLE_SDAREL_HI16D:
4295 case R_PPC_VLE_SDAREL_HA16A:
4296 case R_PPC_VLE_SDAREL_HA16D:
4297 if (h != NULL)
4298 {
4299 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4300 h->non_got_ref = TRUE;
4301 }
4302 break;
4303
4304 case R_PPC_VLE_REL8:
4305 case R_PPC_VLE_REL15:
4306 case R_PPC_VLE_REL24:
4307 case R_PPC_VLE_LO16A:
4308 case R_PPC_VLE_LO16D:
4309 case R_PPC_VLE_HI16A:
4310 case R_PPC_VLE_HI16D:
4311 case R_PPC_VLE_HA16A:
4312 case R_PPC_VLE_HA16D:
4313 case R_PPC_VLE_ADDR20:
4314 break;
4315
4316 case R_PPC_EMB_SDA2REL:
4317 if (bfd_link_pic (info))
4318 {
4319 bad_shared_reloc (abfd, r_type);
4320 return FALSE;
4321 }
4322 htab->sdata[1].sym->ref_regular = 1;
4323 if (h != NULL)
4324 {
4325 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4326 h->non_got_ref = TRUE;
4327 }
4328 break;
4329
4330 case R_PPC_VLE_SDA21_LO:
4331 case R_PPC_VLE_SDA21:
4332 case R_PPC_EMB_SDA21:
4333 case R_PPC_EMB_RELSDA:
4334 if (bfd_link_pic (info))
4335 {
4336 bad_shared_reloc (abfd, r_type);
4337 return FALSE;
4338 }
4339 if (h != NULL)
4340 {
4341 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4342 h->non_got_ref = TRUE;
4343 }
4344 break;
4345
4346 case R_PPC_EMB_NADDR32:
4347 case R_PPC_EMB_NADDR16:
4348 case R_PPC_EMB_NADDR16_LO:
4349 case R_PPC_EMB_NADDR16_HI:
4350 case R_PPC_EMB_NADDR16_HA:
4351 if (bfd_link_pic (info))
4352 {
4353 bad_shared_reloc (abfd, r_type);
4354 return FALSE;
4355 }
4356 if (h != NULL)
4357 h->non_got_ref = TRUE;
4358 break;
4359
4360 case R_PPC_PLTREL24:
4361 if (h == NULL)
4362 break;
4363 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4364 goto pltentry;
4365
4366 case R_PPC_PLTCALL:
4367 sec->has_pltcall = 1;
4368 /* Fall through. */
4369
4370 case R_PPC_PLT32:
4371 case R_PPC_PLTREL32:
4372 case R_PPC_PLT16_LO:
4373 case R_PPC_PLT16_HI:
4374 case R_PPC_PLT16_HA:
4375 pltentry:
4376 #ifdef DEBUG
4377 fprintf (stderr, "Reloc requires a PLT entry\n");
4378 #endif
4379 /* This symbol requires a procedure linkage table entry. */
4380 if (h == NULL)
4381 {
4382 pltent = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4383 NON_GOT | PLT_KEEP);
4384 if (pltent == NULL)
4385 return FALSE;
4386 }
4387 else
4388 {
4389 if (r_type != R_PPC_PLTREL24)
4390 ppc_elf_hash_entry (h)->tls_mask |= PLT_KEEP;
4391 h->needs_plt = 1;
4392 pltent = &h->plt.plist;
4393 }
4394 addend = 0;
4395 if (bfd_link_pic (info)
4396 && (r_type == R_PPC_PLTREL24
4397 || r_type == R_PPC_PLT16_LO
4398 || r_type == R_PPC_PLT16_HI
4399 || r_type == R_PPC_PLT16_HA))
4400 addend = rel->r_addend;
4401 if (!update_plt_info (abfd, pltent, got2, addend))
4402 return FALSE;
4403 break;
4404
4405 /* The following relocations don't need to propagate the
4406 relocation if linking a shared object since they are
4407 section relative. */
4408 case R_PPC_SECTOFF:
4409 case R_PPC_SECTOFF_LO:
4410 case R_PPC_SECTOFF_HI:
4411 case R_PPC_SECTOFF_HA:
4412 case R_PPC_DTPREL16:
4413 case R_PPC_DTPREL16_LO:
4414 case R_PPC_DTPREL16_HI:
4415 case R_PPC_DTPREL16_HA:
4416 case R_PPC_TOC16:
4417 break;
4418
4419 case R_PPC_REL16:
4420 case R_PPC_REL16_LO:
4421 case R_PPC_REL16_HI:
4422 case R_PPC_REL16_HA:
4423 case R_PPC_REL16DX_HA:
4424 ppc_elf_tdata (abfd)->has_rel16 = 1;
4425 break;
4426
4427 /* These are just markers. */
4428 case R_PPC_TLS:
4429 case R_PPC_EMB_MRKREF:
4430 case R_PPC_NONE:
4431 case R_PPC_max:
4432 case R_PPC_RELAX:
4433 case R_PPC_RELAX_PLT:
4434 case R_PPC_RELAX_PLTREL24:
4435 case R_PPC_16DX_HA:
4436 break;
4437
4438 /* These should only appear in dynamic objects. */
4439 case R_PPC_COPY:
4440 case R_PPC_GLOB_DAT:
4441 case R_PPC_JMP_SLOT:
4442 case R_PPC_RELATIVE:
4443 case R_PPC_IRELATIVE:
4444 break;
4445
4446 /* These aren't handled yet. We'll report an error later. */
4447 case R_PPC_ADDR30:
4448 case R_PPC_EMB_RELSEC16:
4449 case R_PPC_EMB_RELST_LO:
4450 case R_PPC_EMB_RELST_HI:
4451 case R_PPC_EMB_RELST_HA:
4452 case R_PPC_EMB_BIT_FLD:
4453 break;
4454
4455 /* This refers only to functions defined in the shared library. */
4456 case R_PPC_LOCAL24PC:
4457 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4458 {
4459 htab->plt_type = PLT_OLD;
4460 htab->old_bfd = abfd;
4461 }
4462 if (h != NULL && h->type == STT_GNU_IFUNC)
4463 {
4464 h->needs_plt = 1;
4465 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4466 return FALSE;
4467 }
4468 break;
4469
4470 /* This relocation describes the C++ object vtable hierarchy.
4471 Reconstruct it for later use during GC. */
4472 case R_PPC_GNU_VTINHERIT:
4473 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4474 return FALSE;
4475 break;
4476
4477 /* This relocation describes which C++ vtable entries are actually
4478 used. Record for later use during GC. */
4479 case R_PPC_GNU_VTENTRY:
4480 BFD_ASSERT (h != NULL);
4481 if (h != NULL
4482 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4483 return FALSE;
4484 break;
4485
4486 /* We shouldn't really be seeing TPREL32. */
4487 case R_PPC_TPREL32:
4488 case R_PPC_TPREL16:
4489 case R_PPC_TPREL16_LO:
4490 case R_PPC_TPREL16_HI:
4491 case R_PPC_TPREL16_HA:
4492 if (bfd_link_dll (info))
4493 info->flags |= DF_STATIC_TLS;
4494 goto dodyn;
4495
4496 /* Nor these. */
4497 case R_PPC_DTPMOD32:
4498 case R_PPC_DTPREL32:
4499 goto dodyn;
4500
4501 case R_PPC_REL32:
4502 if (h == NULL
4503 && got2 != NULL
4504 && (sec->flags & SEC_CODE) != 0
4505 && bfd_link_pic (info)
4506 && htab->plt_type == PLT_UNSET)
4507 {
4508 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4509 the start of a function, which assembles to a REL32
4510 reference to .got2. If we detect one of these, then
4511 force the old PLT layout because the linker cannot
4512 reliably deduce the GOT pointer value needed for
4513 PLT call stubs. */
4514 asection *s;
4515 Elf_Internal_Sym *isym;
4516
4517 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4518 abfd, r_symndx);
4519 if (isym == NULL)
4520 return FALSE;
4521
4522 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4523 if (s == got2)
4524 {
4525 htab->plt_type = PLT_OLD;
4526 htab->old_bfd = abfd;
4527 }
4528 }
4529 if (h == NULL || h == htab->elf.hgot)
4530 break;
4531 /* fall through */
4532
4533 case R_PPC_ADDR32:
4534 case R_PPC_ADDR16:
4535 case R_PPC_ADDR16_LO:
4536 case R_PPC_ADDR16_HI:
4537 case R_PPC_ADDR16_HA:
4538 case R_PPC_UADDR32:
4539 case R_PPC_UADDR16:
4540 if (h != NULL && !bfd_link_pic (info))
4541 {
4542 /* We may need a plt entry if the symbol turns out to be
4543 a function defined in a dynamic object. */
4544 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4545 return FALSE;
4546
4547 /* We may need a copy reloc too. */
4548 h->non_got_ref = 1;
4549 h->pointer_equality_needed = 1;
4550 if (r_type == R_PPC_ADDR16_HA)
4551 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4552 if (r_type == R_PPC_ADDR16_LO)
4553 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4554 }
4555 goto dodyn;
4556
4557 case R_PPC_REL24:
4558 case R_PPC_REL14:
4559 case R_PPC_REL14_BRTAKEN:
4560 case R_PPC_REL14_BRNTAKEN:
4561 if (h == NULL)
4562 break;
4563 if (h == htab->elf.hgot)
4564 {
4565 if (htab->plt_type == PLT_UNSET)
4566 {
4567 htab->plt_type = PLT_OLD;
4568 htab->old_bfd = abfd;
4569 }
4570 break;
4571 }
4572 /* fall through */
4573
4574 case R_PPC_ADDR24:
4575 case R_PPC_ADDR14:
4576 case R_PPC_ADDR14_BRTAKEN:
4577 case R_PPC_ADDR14_BRNTAKEN:
4578 if (h != NULL && !bfd_link_pic (info))
4579 {
4580 /* We may need a plt entry if the symbol turns out to be
4581 a function defined in a dynamic object. */
4582 h->needs_plt = 1;
4583 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4584 return FALSE;
4585 break;
4586 }
4587
4588 dodyn:
4589 /* If we are creating a shared library, and this is a reloc
4590 against a global symbol, or a non PC relative reloc
4591 against a local symbol, then we need to copy the reloc
4592 into the shared library. However, if we are linking with
4593 -Bsymbolic, we do not need to copy a reloc against a
4594 global symbol which is defined in an object we are
4595 including in the link (i.e., DEF_REGULAR is set). At
4596 this point we have not seen all the input files, so it is
4597 possible that DEF_REGULAR is not set now but will be set
4598 later (it is never cleared). In case of a weak definition,
4599 DEF_REGULAR may be cleared later by a strong definition in
4600 a shared library. We account for that possibility below by
4601 storing information in the dyn_relocs field of the hash
4602 table entry. A similar situation occurs when creating
4603 shared libraries and symbol visibility changes render the
4604 symbol local.
4605
4606 If on the other hand, we are creating an executable, we
4607 may need to keep relocations for symbols satisfied by a
4608 dynamic library if we manage to avoid copy relocs for the
4609 symbol. */
4610 if ((bfd_link_pic (info)
4611 && (must_be_dyn_reloc (info, r_type)
4612 || (h != NULL
4613 && (!SYMBOLIC_BIND (info, h)
4614 || h->root.type == bfd_link_hash_defweak
4615 || !h->def_regular))))
4616 || (ELIMINATE_COPY_RELOCS
4617 && !bfd_link_pic (info)
4618 && h != NULL
4619 && (h->root.type == bfd_link_hash_defweak
4620 || !h->def_regular)))
4621 {
4622 #ifdef DEBUG
4623 fprintf (stderr,
4624 "ppc_elf_check_relocs needs to "
4625 "create relocation for %s\n",
4626 (h && h->root.root.string
4627 ? h->root.root.string : "<unknown>"));
4628 #endif
4629 if (sreloc == NULL)
4630 {
4631 if (htab->elf.dynobj == NULL)
4632 htab->elf.dynobj = abfd;
4633
4634 sreloc = _bfd_elf_make_dynamic_reloc_section
4635 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4636
4637 if (sreloc == NULL)
4638 return FALSE;
4639 }
4640
4641 /* If this is a global symbol, we count the number of
4642 relocations we need for this symbol. */
4643 if (h != NULL)
4644 {
4645 struct elf_dyn_relocs *p;
4646 struct elf_dyn_relocs **rel_head;
4647
4648 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4649 p = *rel_head;
4650 if (p == NULL || p->sec != sec)
4651 {
4652 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4653 if (p == NULL)
4654 return FALSE;
4655 p->next = *rel_head;
4656 *rel_head = p;
4657 p->sec = sec;
4658 p->count = 0;
4659 p->pc_count = 0;
4660 }
4661 p->count += 1;
4662 if (!must_be_dyn_reloc (info, r_type))
4663 p->pc_count += 1;
4664 }
4665 else
4666 {
4667 /* Track dynamic relocs needed for local syms too.
4668 We really need local syms available to do this
4669 easily. Oh well. */
4670 struct ppc_dyn_relocs *p;
4671 struct ppc_dyn_relocs **rel_head;
4672 bfd_boolean is_ifunc;
4673 asection *s;
4674 void *vpp;
4675 Elf_Internal_Sym *isym;
4676
4677 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4678 abfd, r_symndx);
4679 if (isym == NULL)
4680 return FALSE;
4681
4682 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4683 if (s == NULL)
4684 s = sec;
4685
4686 vpp = &elf_section_data (s)->local_dynrel;
4687 rel_head = (struct ppc_dyn_relocs **) vpp;
4688 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4689 p = *rel_head;
4690 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4691 p = p->next;
4692 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4693 {
4694 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4695 if (p == NULL)
4696 return FALSE;
4697 p->next = *rel_head;
4698 *rel_head = p;
4699 p->sec = sec;
4700 p->ifunc = is_ifunc;
4701 p->count = 0;
4702 }
4703 p->count += 1;
4704 }
4705 }
4706
4707 break;
4708 }
4709 }
4710
4711 return TRUE;
4712 }
4713 \f
4714 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4715 and OBFD, and merge non-conflicting ones. */
4716 void
4717 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4718 {
4719 bfd *obfd = info->output_bfd;
4720 obj_attribute *in_attr, *in_attrs;
4721 obj_attribute *out_attr, *out_attrs;
4722
4723 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4724 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4725
4726 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4727 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4728
4729 if (in_attr->i != out_attr->i)
4730 {
4731 int in_fp = in_attr->i & 3;
4732 int out_fp = out_attr->i & 3;
4733
4734 if (in_fp == 0)
4735 ;
4736 else if (out_fp == 0)
4737 {
4738 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4739 out_attr->i ^= in_fp;
4740 }
4741 else if (out_fp != 2 && in_fp == 2)
4742 {
4743 _bfd_error_handler
4744 /* xgettext:c-format */
4745 (_("warning: %pB uses hard float, %pB uses soft float"),
4746 obfd, ibfd);
4747 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4748 }
4749 else if (out_fp == 2 && in_fp != 2)
4750 {
4751 _bfd_error_handler
4752 /* xgettext:c-format */
4753 (_("warning: %pB uses hard float, %pB uses soft float"),
4754 ibfd, obfd);
4755 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4756 }
4757 else if (out_fp == 1 && in_fp == 3)
4758 {
4759 _bfd_error_handler
4760 /* xgettext:c-format */
4761 (_("warning: %pB uses double-precision hard float, "
4762 "%pB uses single-precision hard float"), obfd, ibfd);
4763 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4764 }
4765 else if (out_fp == 3 && in_fp == 1)
4766 {
4767 _bfd_error_handler
4768 /* xgettext:c-format */
4769 (_("warning: %pB uses double-precision hard float, "
4770 "%pB uses single-precision hard float"), ibfd, obfd);
4771 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4772 }
4773
4774 in_fp = in_attr->i & 0xc;
4775 out_fp = out_attr->i & 0xc;
4776 if (in_fp == 0)
4777 ;
4778 else if (out_fp == 0)
4779 {
4780 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4781 out_attr->i ^= in_fp;
4782 }
4783 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4784 {
4785 _bfd_error_handler
4786 /* xgettext:c-format */
4787 (_("warning: %pB uses 64-bit long double, "
4788 "%pB uses 128-bit long double"), ibfd, obfd);
4789 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4790 }
4791 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4792 {
4793 _bfd_error_handler
4794 /* xgettext:c-format */
4795 (_("warning: %pB uses 64-bit long double, "
4796 "%pB uses 128-bit long double"), obfd, ibfd);
4797 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4798 }
4799 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4800 {
4801 _bfd_error_handler
4802 /* xgettext:c-format */
4803 (_("warning: %pB uses IBM long double, "
4804 "%pB uses IEEE long double"), obfd, ibfd);
4805 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4806 }
4807 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4808 {
4809 _bfd_error_handler
4810 /* xgettext:c-format */
4811 (_("warning: %pB uses IBM long double, "
4812 "%pB uses IEEE long double"), ibfd, obfd);
4813 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4814 }
4815 }
4816 }
4817
4818 /* Merge object attributes from IBFD into OBFD. Warn if
4819 there are conflicting attributes. */
4820 static bfd_boolean
4821 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4822 {
4823 bfd *obfd;
4824 obj_attribute *in_attr, *in_attrs;
4825 obj_attribute *out_attr, *out_attrs;
4826
4827 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4828
4829 obfd = info->output_bfd;
4830 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4831 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4832
4833 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4834 merge non-conflicting ones. */
4835 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4836 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4837 if (in_attr->i != out_attr->i)
4838 {
4839 int in_vec = in_attr->i & 3;
4840 int out_vec = out_attr->i & 3;
4841
4842 if (in_vec == 0)
4843 ;
4844 else if (out_vec == 0)
4845 {
4846 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4847 out_attr->i = in_vec;
4848 }
4849 /* For now, allow generic to transition to AltiVec or SPE
4850 without a warning. If GCC marked files with their stack
4851 alignment and used don't-care markings for files which are
4852 not affected by the vector ABI, we could warn about this
4853 case too. */
4854 else if (in_vec == 1)
4855 ;
4856 else if (out_vec == 1)
4857 {
4858 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4859 out_attr->i = in_vec;
4860 }
4861 else if (out_vec < in_vec)
4862 {
4863 _bfd_error_handler
4864 /* xgettext:c-format */
4865 (_("warning: %pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
4866 obfd, ibfd);
4867 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4868 }
4869 else if (out_vec > in_vec)
4870 {
4871 _bfd_error_handler
4872 /* xgettext:c-format */
4873 (_("warning: %pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
4874 ibfd, obfd);
4875 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4876 }
4877 }
4878
4879 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4880 and merge non-conflicting ones. */
4881 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4882 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4883 if (in_attr->i != out_attr->i)
4884 {
4885 int in_struct = in_attr->i & 3;
4886 int out_struct = out_attr->i & 3;
4887
4888 if (in_struct == 0 || in_struct == 3)
4889 ;
4890 else if (out_struct == 0)
4891 {
4892 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4893 out_attr->i = in_struct;
4894 }
4895 else if (out_struct < in_struct)
4896 {
4897 _bfd_error_handler
4898 /* xgettext:c-format */
4899 (_("warning: %pB uses r3/r4 for small structure returns, "
4900 "%pB uses memory"), obfd, ibfd);
4901 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4902 }
4903 else if (out_struct > in_struct)
4904 {
4905 _bfd_error_handler
4906 /* xgettext:c-format */
4907 (_("warning: %pB uses r3/r4 for small structure returns, "
4908 "%pB uses memory"), ibfd, obfd);
4909 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4910 }
4911 }
4912
4913 /* Merge Tag_compatibility attributes and any common GNU ones. */
4914 return _bfd_elf_merge_object_attributes (ibfd, info);
4915 }
4916
4917 /* Merge backend specific data from an object file to the output
4918 object file when linking. */
4919
4920 static bfd_boolean
4921 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4922 {
4923 bfd *obfd = info->output_bfd;
4924 flagword old_flags;
4925 flagword new_flags;
4926 bfd_boolean error;
4927
4928 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4929 return TRUE;
4930
4931 /* Check if we have the same endianness. */
4932 if (! _bfd_generic_verify_endian_match (ibfd, info))
4933 return FALSE;
4934
4935 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4936 return FALSE;
4937
4938 new_flags = elf_elfheader (ibfd)->e_flags;
4939 old_flags = elf_elfheader (obfd)->e_flags;
4940 if (!elf_flags_init (obfd))
4941 {
4942 /* First call, no flags set. */
4943 elf_flags_init (obfd) = TRUE;
4944 elf_elfheader (obfd)->e_flags = new_flags;
4945 }
4946
4947 /* Compatible flags are ok. */
4948 else if (new_flags == old_flags)
4949 ;
4950
4951 /* Incompatible flags. */
4952 else
4953 {
4954 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4955 to be linked with either. */
4956 error = FALSE;
4957 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4958 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4959 {
4960 error = TRUE;
4961 _bfd_error_handler
4962 (_("%pB: compiled with -mrelocatable and linked with "
4963 "modules compiled normally"), ibfd);
4964 }
4965 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4966 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4967 {
4968 error = TRUE;
4969 _bfd_error_handler
4970 (_("%pB: compiled normally and linked with "
4971 "modules compiled with -mrelocatable"), ibfd);
4972 }
4973
4974 /* The output is -mrelocatable-lib iff both the input files are. */
4975 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4976 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4977
4978 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4979 but each input file is either -mrelocatable or -mrelocatable-lib. */
4980 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4981 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4982 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4983 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4984
4985 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4986 any module uses it. */
4987 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4988
4989 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4990 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4991
4992 /* Warn about any other mismatches. */
4993 if (new_flags != old_flags)
4994 {
4995 error = TRUE;
4996 _bfd_error_handler
4997 /* xgettext:c-format */
4998 (_("%pB: uses different e_flags (%#x) fields "
4999 "than previous modules (%#x)"),
5000 ibfd, new_flags, old_flags);
5001 }
5002
5003 if (error)
5004 {
5005 bfd_set_error (bfd_error_bad_value);
5006 return FALSE;
5007 }
5008 }
5009
5010 return TRUE;
5011 }
5012
5013 static void
5014 ppc_elf_vle_split16 (bfd *input_bfd,
5015 asection *input_section,
5016 unsigned long offset,
5017 bfd_byte *loc,
5018 bfd_vma value,
5019 split16_format_type split16_format,
5020 bfd_boolean fixup)
5021 {
5022 unsigned int insn, opcode, top5;
5023
5024 insn = bfd_get_32 (input_bfd, loc);
5025 opcode = insn & 0xfc00f800;
5026 if (opcode == E_OR2I_INSN
5027 || opcode == E_AND2I_DOT_INSN
5028 || opcode == E_OR2IS_INSN
5029 || opcode == E_LIS_INSN
5030 || opcode == E_AND2IS_DOT_INSN)
5031 {
5032 if (split16_format != split16a_type)
5033 {
5034 if (fixup)
5035 split16_format = split16a_type;
5036 else
5037 _bfd_error_handler
5038 /* xgettext:c-format */
5039 (_("%pB(%pA+0x%lx): expected 16A style relocation on 0x%08x insn"),
5040 input_bfd, input_section, offset, opcode);
5041 }
5042 }
5043 else if (opcode == E_ADD2I_DOT_INSN
5044 || opcode == E_ADD2IS_INSN
5045 || opcode == E_CMP16I_INSN
5046 || opcode == E_MULL2I_INSN
5047 || opcode == E_CMPL16I_INSN
5048 || opcode == E_CMPH16I_INSN
5049 || opcode == E_CMPHL16I_INSN)
5050 {
5051 if (split16_format != split16d_type)
5052 {
5053 if (fixup)
5054 split16_format = split16d_type;
5055 else
5056 _bfd_error_handler
5057 /* xgettext:c-format */
5058 (_("%pB(%pA+0x%lx): expected 16D style relocation on 0x%08x insn"),
5059 input_bfd, input_section, offset, opcode);
5060 }
5061 }
5062 top5 = value & 0xf800;
5063 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
5064 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
5065 insn |= top5;
5066 insn |= value & 0x7ff;
5067 bfd_put_32 (input_bfd, insn, loc);
5068 }
5069
5070 static void
5071 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
5072 {
5073 unsigned int insn;
5074
5075 insn = bfd_get_32 (output_bfd, loc);
5076 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
5077 /* Top 4 bits of value to 17..20. */
5078 insn |= (value & 0xf0000) >> 5;
5079 /* Next 5 bits of the value to 11..15. */
5080 insn |= (value & 0xf800) << 5;
5081 /* And the final 11 bits of the value to bits 21 to 31. */
5082 insn |= value & 0x7ff;
5083 bfd_put_32 (output_bfd, insn, loc);
5084 }
5085
5086 \f
5087 /* Choose which PLT scheme to use, and set .plt flags appropriately.
5088 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
5089 int
5090 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
5091 struct bfd_link_info *info)
5092 {
5093 struct ppc_elf_link_hash_table *htab;
5094 flagword flags;
5095
5096 htab = ppc_elf_hash_table (info);
5097
5098 if (htab->plt_type == PLT_UNSET)
5099 {
5100 struct elf_link_hash_entry *h;
5101
5102 if (htab->params->plt_style == PLT_OLD)
5103 htab->plt_type = PLT_OLD;
5104 else if (bfd_link_pic (info)
5105 && htab->elf.dynamic_sections_created
5106 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
5107 FALSE, FALSE, TRUE)) != NULL
5108 && (h->type == STT_FUNC
5109 || h->needs_plt)
5110 && h->ref_regular
5111 && !(SYMBOL_CALLS_LOCAL (info, h)
5112 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5113 {
5114 /* Profiling of shared libs (and pies) is not supported with
5115 secure plt, because ppc32 does profiling before a
5116 function prologue and a secure plt pic call stubs needs
5117 r30 to be set up. */
5118 htab->plt_type = PLT_OLD;
5119 }
5120 else
5121 {
5122 bfd *ibfd;
5123 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
5124
5125 /* Look through the reloc flags left by ppc_elf_check_relocs.
5126 Use the old style bss plt if a file makes plt calls
5127 without using the new relocs, and if ld isn't given
5128 --secure-plt and we never see REL16 relocs. */
5129 if (plt_type == PLT_UNSET)
5130 plt_type = PLT_OLD;
5131 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
5132 if (is_ppc_elf (ibfd))
5133 {
5134 if (ppc_elf_tdata (ibfd)->has_rel16)
5135 plt_type = PLT_NEW;
5136 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5137 {
5138 plt_type = PLT_OLD;
5139 htab->old_bfd = ibfd;
5140 break;
5141 }
5142 }
5143 htab->plt_type = plt_type;
5144 }
5145 }
5146 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5147 {
5148 if (htab->old_bfd != NULL)
5149 _bfd_error_handler (_("bss-plt forced due to %pB"), htab->old_bfd);
5150 else
5151 _bfd_error_handler (_("bss-plt forced by profiling"));
5152 }
5153
5154 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5155
5156 if (htab->plt_type == PLT_NEW)
5157 {
5158 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5159 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5160
5161 /* The new PLT is a loaded section. */
5162 if (htab->elf.splt != NULL
5163 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5164 return -1;
5165
5166 /* The new GOT is not executable. */
5167 if (htab->elf.sgot != NULL
5168 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5169 return -1;
5170 }
5171 else
5172 {
5173 /* Stop an unused .glink section from affecting .text alignment. */
5174 if (htab->glink != NULL
5175 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5176 return -1;
5177 }
5178 return htab->plt_type == PLT_NEW;
5179 }
5180 \f
5181 /* Return the section that should be marked against GC for a given
5182 relocation. */
5183
5184 static asection *
5185 ppc_elf_gc_mark_hook (asection *sec,
5186 struct bfd_link_info *info,
5187 Elf_Internal_Rela *rel,
5188 struct elf_link_hash_entry *h,
5189 Elf_Internal_Sym *sym)
5190 {
5191 if (h != NULL)
5192 switch (ELF32_R_TYPE (rel->r_info))
5193 {
5194 case R_PPC_GNU_VTINHERIT:
5195 case R_PPC_GNU_VTENTRY:
5196 return NULL;
5197 }
5198
5199 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5200 }
5201
5202 static bfd_boolean
5203 get_sym_h (struct elf_link_hash_entry **hp,
5204 Elf_Internal_Sym **symp,
5205 asection **symsecp,
5206 unsigned char **tls_maskp,
5207 Elf_Internal_Sym **locsymsp,
5208 unsigned long r_symndx,
5209 bfd *ibfd)
5210 {
5211 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5212
5213 if (r_symndx >= symtab_hdr->sh_info)
5214 {
5215 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5216 struct elf_link_hash_entry *h;
5217
5218 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5219 while (h->root.type == bfd_link_hash_indirect
5220 || h->root.type == bfd_link_hash_warning)
5221 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5222
5223 if (hp != NULL)
5224 *hp = h;
5225
5226 if (symp != NULL)
5227 *symp = NULL;
5228
5229 if (symsecp != NULL)
5230 {
5231 asection *symsec = NULL;
5232 if (h->root.type == bfd_link_hash_defined
5233 || h->root.type == bfd_link_hash_defweak)
5234 symsec = h->root.u.def.section;
5235 *symsecp = symsec;
5236 }
5237
5238 if (tls_maskp != NULL)
5239 *tls_maskp = &ppc_elf_hash_entry (h)->tls_mask;
5240 }
5241 else
5242 {
5243 Elf_Internal_Sym *sym;
5244 Elf_Internal_Sym *locsyms = *locsymsp;
5245
5246 if (locsyms == NULL)
5247 {
5248 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5249 if (locsyms == NULL)
5250 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5251 symtab_hdr->sh_info,
5252 0, NULL, NULL, NULL);
5253 if (locsyms == NULL)
5254 return FALSE;
5255 *locsymsp = locsyms;
5256 }
5257 sym = locsyms + r_symndx;
5258
5259 if (hp != NULL)
5260 *hp = NULL;
5261
5262 if (symp != NULL)
5263 *symp = sym;
5264
5265 if (symsecp != NULL)
5266 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5267
5268 if (tls_maskp != NULL)
5269 {
5270 bfd_signed_vma *local_got;
5271 unsigned char *tls_mask;
5272
5273 tls_mask = NULL;
5274 local_got = elf_local_got_refcounts (ibfd);
5275 if (local_got != NULL)
5276 {
5277 struct plt_entry **local_plt = (struct plt_entry **)
5278 (local_got + symtab_hdr->sh_info);
5279 unsigned char *lgot_masks = (unsigned char *)
5280 (local_plt + symtab_hdr->sh_info);
5281 tls_mask = &lgot_masks[r_symndx];
5282 }
5283 *tls_maskp = tls_mask;
5284 }
5285 }
5286 return TRUE;
5287 }
5288 \f
5289 /* Analyze inline PLT call relocations to see whether calls to locally
5290 defined functions can be converted to direct calls. */
5291
5292 bfd_boolean
5293 ppc_elf_inline_plt (struct bfd_link_info *info)
5294 {
5295 struct ppc_elf_link_hash_table *htab;
5296 bfd *ibfd;
5297 asection *sec;
5298 bfd_vma low_vma, high_vma, limit;
5299
5300 htab = ppc_elf_hash_table (info);
5301 if (htab == NULL)
5302 return FALSE;
5303
5304 /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is
5305 reduced somewhat to cater for possible stubs that might be added
5306 between the call and its destination. */
5307 limit = 0x1e00000;
5308 low_vma = -1;
5309 high_vma = 0;
5310 for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next)
5311 if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE))
5312 {
5313 if (low_vma > sec->vma)
5314 low_vma = sec->vma;
5315 if (high_vma < sec->vma + sec->size)
5316 high_vma = sec->vma + sec->size;
5317 }
5318
5319 /* If a "bl" can reach anywhere in local code sections, then we can
5320 convert all inline PLT sequences to direct calls when the symbol
5321 is local. */
5322 if (high_vma - low_vma < limit)
5323 {
5324 htab->can_convert_all_inline_plt = 1;
5325 return TRUE;
5326 }
5327
5328 /* Otherwise, go looking through relocs for cases where a direct
5329 call won't reach. Mark the symbol on any such reloc to disable
5330 the optimization and keep the PLT entry as it seems likely that
5331 this will be better than creating trampolines. Note that this
5332 will disable the optimization for all inline PLT calls to a
5333 particular symbol, not just those that won't reach. The
5334 difficulty in doing a more precise optimization is that the
5335 linker needs to make a decision depending on whether a
5336 particular R_PPC_PLTCALL insn can be turned into a direct
5337 call, for each of the R_PPC_PLTSEQ and R_PPC_PLT16* insns in
5338 the sequence, and there is nothing that ties those relocs
5339 together except their symbol. */
5340
5341 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5342 {
5343 Elf_Internal_Shdr *symtab_hdr;
5344 Elf_Internal_Sym *local_syms;
5345
5346 if (!is_ppc_elf (ibfd))
5347 continue;
5348
5349 local_syms = NULL;
5350 symtab_hdr = &elf_symtab_hdr (ibfd);
5351
5352 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5353 if (sec->has_pltcall
5354 && !bfd_is_abs_section (sec->output_section))
5355 {
5356 Elf_Internal_Rela *relstart, *rel, *relend;
5357
5358 /* Read the relocations. */
5359 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5360 info->keep_memory);
5361 if (relstart == NULL)
5362 return FALSE;
5363
5364 relend = relstart + sec->reloc_count;
5365 for (rel = relstart; rel < relend; )
5366 {
5367 enum elf_ppc_reloc_type r_type;
5368 unsigned long r_symndx;
5369 asection *sym_sec;
5370 struct elf_link_hash_entry *h;
5371 Elf_Internal_Sym *sym;
5372 unsigned char *tls_maskp;
5373
5374 r_type = ELF32_R_TYPE (rel->r_info);
5375 if (r_type != R_PPC_PLTCALL)
5376 continue;
5377
5378 r_symndx = ELF32_R_SYM (rel->r_info);
5379 if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms,
5380 r_symndx, ibfd))
5381 {
5382 if (elf_section_data (sec)->relocs != relstart)
5383 free (relstart);
5384 if (local_syms != NULL
5385 && symtab_hdr->contents != (unsigned char *) local_syms)
5386 free (local_syms);
5387 return FALSE;
5388 }
5389
5390 if (sym_sec != NULL && sym_sec->output_section != NULL)
5391 {
5392 bfd_vma from, to;
5393 if (h != NULL)
5394 to = h->root.u.def.value;
5395 else
5396 to = sym->st_value;
5397 to += (rel->r_addend
5398 + sym_sec->output_offset
5399 + sym_sec->output_section->vma);
5400 from = (rel->r_offset
5401 + sec->output_offset
5402 + sec->output_section->vma);
5403 if (to - from + limit < 2 * limit)
5404 *tls_maskp &= ~PLT_KEEP;
5405 }
5406 }
5407 if (elf_section_data (sec)->relocs != relstart)
5408 free (relstart);
5409 }
5410
5411 if (local_syms != NULL
5412 && symtab_hdr->contents != (unsigned char *) local_syms)
5413 {
5414 if (!info->keep_memory)
5415 free (local_syms);
5416 else
5417 symtab_hdr->contents = (unsigned char *) local_syms;
5418 }
5419 }
5420
5421 return TRUE;
5422 }
5423
5424 /* Set plt output section type, htab->tls_get_addr, and call the
5425 generic ELF tls_setup function. */
5426
5427 asection *
5428 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5429 {
5430 struct ppc_elf_link_hash_table *htab;
5431
5432 htab = ppc_elf_hash_table (info);
5433 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5434 FALSE, FALSE, TRUE);
5435 if (htab->plt_type != PLT_NEW)
5436 htab->params->no_tls_get_addr_opt = TRUE;
5437
5438 if (!htab->params->no_tls_get_addr_opt)
5439 {
5440 struct elf_link_hash_entry *opt, *tga;
5441 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5442 FALSE, FALSE, TRUE);
5443 if (opt != NULL
5444 && (opt->root.type == bfd_link_hash_defined
5445 || opt->root.type == bfd_link_hash_defweak))
5446 {
5447 /* If glibc supports an optimized __tls_get_addr call stub,
5448 signalled by the presence of __tls_get_addr_opt, and we'll
5449 be calling __tls_get_addr via a plt call stub, then
5450 make __tls_get_addr point to __tls_get_addr_opt. */
5451 tga = htab->tls_get_addr;
5452 if (htab->elf.dynamic_sections_created
5453 && tga != NULL
5454 && (tga->type == STT_FUNC
5455 || tga->needs_plt)
5456 && !(SYMBOL_CALLS_LOCAL (info, tga)
5457 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5458 {
5459 struct plt_entry *ent;
5460 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5461 if (ent->plt.refcount > 0)
5462 break;
5463 if (ent != NULL)
5464 {
5465 tga->root.type = bfd_link_hash_indirect;
5466 tga->root.u.i.link = &opt->root;
5467 ppc_elf_copy_indirect_symbol (info, opt, tga);
5468 opt->mark = 1;
5469 if (opt->dynindx != -1)
5470 {
5471 /* Use __tls_get_addr_opt in dynamic relocations. */
5472 opt->dynindx = -1;
5473 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5474 opt->dynstr_index);
5475 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5476 return FALSE;
5477 }
5478 htab->tls_get_addr = opt;
5479 }
5480 }
5481 }
5482 else
5483 htab->params->no_tls_get_addr_opt = TRUE;
5484 }
5485 if (htab->plt_type == PLT_NEW
5486 && htab->elf.splt != NULL
5487 && htab->elf.splt->output_section != NULL)
5488 {
5489 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5490 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5491 }
5492
5493 return _bfd_elf_tls_setup (obfd, info);
5494 }
5495
5496 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5497 HASH. */
5498
5499 static bfd_boolean
5500 branch_reloc_hash_match (const bfd *ibfd,
5501 const Elf_Internal_Rela *rel,
5502 const struct elf_link_hash_entry *hash)
5503 {
5504 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5505 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5506 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5507
5508 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5509 {
5510 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5511 struct elf_link_hash_entry *h;
5512
5513 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5514 while (h->root.type == bfd_link_hash_indirect
5515 || h->root.type == bfd_link_hash_warning)
5516 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5517 if (h == hash)
5518 return TRUE;
5519 }
5520 return FALSE;
5521 }
5522
5523 /* Run through all the TLS relocs looking for optimization
5524 opportunities. */
5525
5526 bfd_boolean
5527 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5528 struct bfd_link_info *info)
5529 {
5530 bfd *ibfd;
5531 asection *sec;
5532 struct ppc_elf_link_hash_table *htab;
5533 int pass;
5534
5535 if (!bfd_link_executable (info))
5536 return TRUE;
5537
5538 htab = ppc_elf_hash_table (info);
5539 if (htab == NULL)
5540 return FALSE;
5541
5542 /* Make two passes through the relocs. First time check that tls
5543 relocs involved in setting up a tls_get_addr call are indeed
5544 followed by such a call. If they are not, don't do any tls
5545 optimization. On the second pass twiddle tls_mask flags to
5546 notify relocate_section that optimization can be done, and
5547 adjust got and plt refcounts. */
5548 for (pass = 0; pass < 2; ++pass)
5549 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5550 {
5551 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5552 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5553
5554 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5555 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5556 {
5557 Elf_Internal_Rela *relstart, *rel, *relend;
5558 int expecting_tls_get_addr = 0;
5559
5560 /* Read the relocations. */
5561 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5562 info->keep_memory);
5563 if (relstart == NULL)
5564 return FALSE;
5565
5566 relend = relstart + sec->reloc_count;
5567 for (rel = relstart; rel < relend; rel++)
5568 {
5569 enum elf_ppc_reloc_type r_type;
5570 unsigned long r_symndx;
5571 struct elf_link_hash_entry *h = NULL;
5572 unsigned char *tls_mask;
5573 unsigned char tls_set, tls_clear;
5574 bfd_boolean is_local;
5575 bfd_signed_vma *got_count;
5576
5577 r_symndx = ELF32_R_SYM (rel->r_info);
5578 if (r_symndx >= symtab_hdr->sh_info)
5579 {
5580 struct elf_link_hash_entry **sym_hashes;
5581
5582 sym_hashes = elf_sym_hashes (ibfd);
5583 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5584 while (h->root.type == bfd_link_hash_indirect
5585 || h->root.type == bfd_link_hash_warning)
5586 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5587 }
5588
5589 is_local = FALSE;
5590 if (h == NULL
5591 || !h->def_dynamic)
5592 is_local = TRUE;
5593
5594 r_type = ELF32_R_TYPE (rel->r_info);
5595 /* If this section has old-style __tls_get_addr calls
5596 without marker relocs, then check that each
5597 __tls_get_addr call reloc is preceded by a reloc
5598 that conceivably belongs to the __tls_get_addr arg
5599 setup insn. If we don't find matching arg setup
5600 relocs, don't do any tls optimization. */
5601 if (pass == 0
5602 && sec->has_tls_get_addr_call
5603 && h != NULL
5604 && h == htab->tls_get_addr
5605 && !expecting_tls_get_addr
5606 && is_branch_reloc (r_type))
5607 {
5608 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5609 "TLS optimization disabled\n",
5610 ibfd, sec, rel->r_offset);
5611 if (elf_section_data (sec)->relocs != relstart)
5612 free (relstart);
5613 return TRUE;
5614 }
5615
5616 expecting_tls_get_addr = 0;
5617 switch (r_type)
5618 {
5619 case R_PPC_GOT_TLSLD16:
5620 case R_PPC_GOT_TLSLD16_LO:
5621 expecting_tls_get_addr = 1;
5622 /* Fall through. */
5623
5624 case R_PPC_GOT_TLSLD16_HI:
5625 case R_PPC_GOT_TLSLD16_HA:
5626 /* These relocs should never be against a symbol
5627 defined in a shared lib. Leave them alone if
5628 that turns out to be the case. */
5629 if (!is_local)
5630 continue;
5631
5632 /* LD -> LE */
5633 tls_set = 0;
5634 tls_clear = TLS_LD;
5635 break;
5636
5637 case R_PPC_GOT_TLSGD16:
5638 case R_PPC_GOT_TLSGD16_LO:
5639 expecting_tls_get_addr = 1;
5640 /* Fall through. */
5641
5642 case R_PPC_GOT_TLSGD16_HI:
5643 case R_PPC_GOT_TLSGD16_HA:
5644 if (is_local)
5645 /* GD -> LE */
5646 tls_set = 0;
5647 else
5648 /* GD -> IE */
5649 tls_set = TLS_TLS | TLS_TPRELGD;
5650 tls_clear = TLS_GD;
5651 break;
5652
5653 case R_PPC_GOT_TPREL16:
5654 case R_PPC_GOT_TPREL16_LO:
5655 case R_PPC_GOT_TPREL16_HI:
5656 case R_PPC_GOT_TPREL16_HA:
5657 if (is_local)
5658 {
5659 /* IE -> LE */
5660 tls_set = 0;
5661 tls_clear = TLS_TPREL;
5662 break;
5663 }
5664 else
5665 continue;
5666
5667 case R_PPC_TLSGD:
5668 case R_PPC_TLSLD:
5669 if (rel + 1 < relend
5670 && is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
5671 {
5672 if (pass != 0
5673 && ELF32_R_TYPE (rel[1].r_info) != R_PPC_PLTSEQ)
5674 {
5675 r_type = ELF32_R_TYPE (rel[1].r_info);
5676 r_symndx = ELF32_R_SYM (rel[1].r_info);
5677 if (r_symndx >= symtab_hdr->sh_info)
5678 {
5679 struct elf_link_hash_entry **sym_hashes;
5680
5681 sym_hashes = elf_sym_hashes (ibfd);
5682 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5683 while (h->root.type == bfd_link_hash_indirect
5684 || h->root.type == bfd_link_hash_warning)
5685 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5686 if (h != NULL)
5687 {
5688 struct plt_entry *ent = NULL;
5689 bfd_vma addend = 0;
5690
5691 if (bfd_link_pic (info))
5692 addend = rel->r_addend;
5693 ent = find_plt_ent (&h->plt.plist,
5694 got2, addend);
5695 if (ent != NULL
5696 && ent->plt.refcount > 0)
5697 ent->plt.refcount -= 1;
5698 }
5699 }
5700 }
5701 continue;
5702 }
5703 expecting_tls_get_addr = 2;
5704 tls_set = 0;
5705 tls_clear = 0;
5706 break;
5707
5708 default:
5709 continue;
5710 }
5711
5712 if (pass == 0)
5713 {
5714 if (!expecting_tls_get_addr
5715 || !sec->has_tls_get_addr_call)
5716 continue;
5717
5718 if (rel + 1 < relend
5719 && branch_reloc_hash_match (ibfd, rel + 1,
5720 htab->tls_get_addr))
5721 continue;
5722
5723 /* Uh oh, we didn't find the expected call. We
5724 could just mark this symbol to exclude it
5725 from tls optimization but it's safer to skip
5726 the entire optimization. */
5727 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5728 "TLS optimization disabled\n"),
5729 ibfd, sec, rel->r_offset);
5730 if (elf_section_data (sec)->relocs != relstart)
5731 free (relstart);
5732 return TRUE;
5733 }
5734
5735 if (h != NULL)
5736 {
5737 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5738 got_count = &h->got.refcount;
5739 }
5740 else
5741 {
5742 bfd_signed_vma *lgot_refs;
5743 struct plt_entry **local_plt;
5744 unsigned char *lgot_masks;
5745
5746 lgot_refs = elf_local_got_refcounts (ibfd);
5747 if (lgot_refs == NULL)
5748 abort ();
5749 local_plt = (struct plt_entry **)
5750 (lgot_refs + symtab_hdr->sh_info);
5751 lgot_masks = (unsigned char *)
5752 (local_plt + symtab_hdr->sh_info);
5753 tls_mask = &lgot_masks[r_symndx];
5754 got_count = &lgot_refs[r_symndx];
5755 }
5756
5757 /* If we don't have old-style __tls_get_addr calls
5758 without TLSGD/TLSLD marker relocs, and we haven't
5759 found a new-style __tls_get_addr call with a
5760 marker for this symbol, then we either have a
5761 broken object file or an -mlongcall style
5762 indirect call to __tls_get_addr without a marker.
5763 Disable optimization in this case. */
5764 if ((tls_clear & (TLS_GD | TLS_LD)) != 0
5765 && !sec->has_tls_get_addr_call
5766 && ((*tls_mask & (TLS_TLS | TLS_MARK))
5767 != (TLS_TLS | TLS_MARK)))
5768 continue;
5769
5770 if (expecting_tls_get_addr)
5771 {
5772 struct plt_entry *ent;
5773 bfd_vma addend = 0;
5774
5775 if (bfd_link_pic (info)
5776 && (ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24
5777 || ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTCALL))
5778 addend = rel[1].r_addend;
5779 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5780 got2, addend);
5781 if (ent != NULL && ent->plt.refcount > 0)
5782 ent->plt.refcount -= 1;
5783
5784 if (expecting_tls_get_addr == 2)
5785 continue;
5786 }
5787
5788 if (tls_set == 0)
5789 {
5790 /* We managed to get rid of a got entry. */
5791 if (*got_count > 0)
5792 *got_count -= 1;
5793 }
5794
5795 *tls_mask |= tls_set;
5796 *tls_mask &= ~tls_clear;
5797 }
5798
5799 if (elf_section_data (sec)->relocs != relstart)
5800 free (relstart);
5801 }
5802 }
5803 htab->do_tls_opt = 1;
5804 return TRUE;
5805 }
5806 \f
5807 /* Find dynamic relocs for H that apply to read-only sections. */
5808
5809 static asection *
5810 readonly_dynrelocs (struct elf_link_hash_entry *h)
5811 {
5812 struct elf_dyn_relocs *p;
5813
5814 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5815 {
5816 asection *s = p->sec->output_section;
5817
5818 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5819 return p->sec;
5820 }
5821 return NULL;
5822 }
5823
5824 /* Return true if we have dynamic relocs against H or any of its weak
5825 aliases, that apply to read-only sections. Cannot be used after
5826 size_dynamic_sections. */
5827
5828 static bfd_boolean
5829 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
5830 {
5831 struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h);
5832 do
5833 {
5834 if (readonly_dynrelocs (&eh->elf))
5835 return TRUE;
5836 eh = ppc_elf_hash_entry (eh->elf.u.alias);
5837 } while (eh != NULL && &eh->elf != h);
5838
5839 return FALSE;
5840 }
5841
5842 /* Return whether H has pc-relative dynamic relocs. */
5843
5844 static bfd_boolean
5845 pc_dynrelocs (struct elf_link_hash_entry *h)
5846 {
5847 struct elf_dyn_relocs *p;
5848
5849 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5850 if (p->pc_count != 0)
5851 return TRUE;
5852 return FALSE;
5853 }
5854
5855 /* Adjust a symbol defined by a dynamic object and referenced by a
5856 regular object. The current definition is in some section of the
5857 dynamic object, but we're not including those sections. We have to
5858 change the definition to something the rest of the link can
5859 understand. */
5860
5861 static bfd_boolean
5862 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5863 struct elf_link_hash_entry *h)
5864 {
5865 struct ppc_elf_link_hash_table *htab;
5866 asection *s;
5867
5868 #ifdef DEBUG
5869 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5870 h->root.root.string);
5871 #endif
5872
5873 /* Make sure we know what is going on here. */
5874 htab = ppc_elf_hash_table (info);
5875 BFD_ASSERT (htab->elf.dynobj != NULL
5876 && (h->needs_plt
5877 || h->type == STT_GNU_IFUNC
5878 || h->is_weakalias
5879 || (h->def_dynamic
5880 && h->ref_regular
5881 && !h->def_regular)));
5882
5883 /* Deal with function syms. */
5884 if (h->type == STT_FUNC
5885 || h->type == STT_GNU_IFUNC
5886 || h->needs_plt)
5887 {
5888 bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, h)
5889 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
5890 /* Discard dyn_relocs when non-pic if we've decided that a
5891 function symbol is local. */
5892 if (!bfd_link_pic (info) && local)
5893 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5894
5895 /* Clear procedure linkage table information for any symbol that
5896 won't need a .plt entry. */
5897 struct plt_entry *ent;
5898 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5899 if (ent->plt.refcount > 0)
5900 break;
5901 if (ent == NULL
5902 || (h->type != STT_GNU_IFUNC
5903 && local
5904 && (htab->can_convert_all_inline_plt
5905 || (ppc_elf_hash_entry (h)->tls_mask
5906 & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)))
5907 {
5908 /* A PLT entry is not required/allowed when:
5909
5910 1. We are not using ld.so; because then the PLT entry
5911 can't be set up, so we can't use one. In this case,
5912 ppc_elf_adjust_dynamic_symbol won't even be called.
5913
5914 2. GC has rendered the entry unused.
5915
5916 3. We know for certain that a call to this symbol
5917 will go to this object, or will remain undefined. */
5918 h->plt.plist = NULL;
5919 h->needs_plt = 0;
5920 h->pointer_equality_needed = 0;
5921 }
5922 else
5923 {
5924 /* Taking a function's address in a read/write section
5925 doesn't require us to define the function symbol in the
5926 executable on a plt call stub. A dynamic reloc can
5927 be used instead, giving better runtime performance.
5928 (Calls via that function pointer don't need to bounce
5929 through the plt call stub.) Similarly, use a dynamic
5930 reloc for a weak reference when possible, allowing the
5931 resolution of the symbol to be set at load time rather
5932 than link time. */
5933 if ((h->pointer_equality_needed
5934 || (h->non_got_ref
5935 && !h->ref_regular_nonweak
5936 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5937 && !htab->is_vxworks
5938 && !ppc_elf_hash_entry (h)->has_sda_refs
5939 && !readonly_dynrelocs (h))
5940 {
5941 h->pointer_equality_needed = 0;
5942 /* If we haven't seen a branch reloc and the symbol
5943 isn't an ifunc then we don't need a plt entry. */
5944 if (!h->needs_plt && h->type != STT_GNU_IFUNC)
5945 h->plt.plist = NULL;
5946 }
5947 else if (!bfd_link_pic (info))
5948 /* We are going to be defining the function symbol on the
5949 plt stub, so no dyn_relocs needed when non-pic. */
5950 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5951 }
5952 h->protected_def = 0;
5953 /* Function symbols can't have copy relocs. */
5954 return TRUE;
5955 }
5956 else
5957 h->plt.plist = NULL;
5958
5959 /* If this is a weak symbol, and there is a real definition, the
5960 processor independent code will have arranged for us to see the
5961 real definition first, and we can just use the same value. */
5962 if (h->is_weakalias)
5963 {
5964 struct elf_link_hash_entry *def = weakdef (h);
5965 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5966 h->root.u.def.section = def->root.u.def.section;
5967 h->root.u.def.value = def->root.u.def.value;
5968 if (def->root.u.def.section == htab->elf.sdynbss
5969 || def->root.u.def.section == htab->elf.sdynrelro
5970 || def->root.u.def.section == htab->dynsbss)
5971 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5972 return TRUE;
5973 }
5974
5975 /* This is a reference to a symbol defined by a dynamic object which
5976 is not a function. */
5977
5978 /* If we are creating a shared library, we must presume that the
5979 only references to the symbol are via the global offset table.
5980 For such cases we need not do anything here; the relocations will
5981 be handled correctly by relocate_section. */
5982 if (bfd_link_pic (info))
5983 {
5984 h->protected_def = 0;
5985 return TRUE;
5986 }
5987
5988 /* If there are no references to this symbol that do not use the
5989 GOT, we don't need to generate a copy reloc. */
5990 if (!h->non_got_ref)
5991 {
5992 h->protected_def = 0;
5993 return TRUE;
5994 }
5995
5996 /* Protected variables do not work with .dynbss. The copy in
5997 .dynbss won't be used by the shared library with the protected
5998 definition for the variable. Editing to PIC, or text relocations
5999 are preferable to an incorrect program. */
6000 if (h->protected_def)
6001 {
6002 if (ELIMINATE_COPY_RELOCS
6003 && ppc_elf_hash_entry (h)->has_addr16_ha
6004 && ppc_elf_hash_entry (h)->has_addr16_lo
6005 && htab->params->pic_fixup == 0
6006 && info->disable_target_specific_optimizations <= 1)
6007 htab->params->pic_fixup = 1;
6008 return TRUE;
6009 }
6010
6011 /* If -z nocopyreloc was given, we won't generate them either. */
6012 if (info->nocopyreloc)
6013 return TRUE;
6014
6015 /* If we don't find any dynamic relocs in read-only sections, then
6016 we'll be keeping the dynamic relocs and avoiding the copy reloc.
6017 We can't do this if there are any small data relocations. This
6018 doesn't work on VxWorks, where we can not have dynamic
6019 relocations (other than copy and jump slot relocations) in an
6020 executable. */
6021 if (ELIMINATE_COPY_RELOCS
6022 && !ppc_elf_hash_entry (h)->has_sda_refs
6023 && !htab->is_vxworks
6024 && !h->def_regular
6025 && !alias_readonly_dynrelocs (h))
6026 return TRUE;
6027
6028 /* We must allocate the symbol in our .dynbss section, which will
6029 become part of the .bss section of the executable. There will be
6030 an entry for this symbol in the .dynsym section. The dynamic
6031 object will contain position independent code, so all references
6032 from the dynamic object to this symbol will go through the global
6033 offset table. The dynamic linker will use the .dynsym entry to
6034 determine the address it must put in the global offset table, so
6035 both the dynamic object and the regular object will refer to the
6036 same memory location for the variable.
6037
6038 Of course, if the symbol is referenced using SDAREL relocs, we
6039 must instead allocate it in .sbss. */
6040 if (ppc_elf_hash_entry (h)->has_sda_refs)
6041 s = htab->dynsbss;
6042 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
6043 s = htab->elf.sdynrelro;
6044 else
6045 s = htab->elf.sdynbss;
6046 BFD_ASSERT (s != NULL);
6047
6048 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6049 {
6050 asection *srel;
6051
6052 /* We must generate a R_PPC_COPY reloc to tell the dynamic
6053 linker to copy the initial value out of the dynamic object
6054 and into the runtime process image. */
6055 if (ppc_elf_hash_entry (h)->has_sda_refs)
6056 srel = htab->relsbss;
6057 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
6058 srel = htab->elf.sreldynrelro;
6059 else
6060 srel = htab->elf.srelbss;
6061 BFD_ASSERT (srel != NULL);
6062 srel->size += sizeof (Elf32_External_Rela);
6063 h->needs_copy = 1;
6064 }
6065
6066 /* We no longer want dyn_relocs. */
6067 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
6068 return _bfd_elf_adjust_dynamic_copy (info, h, s);
6069 }
6070 \f
6071 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
6072 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
6073 specifying the addend on the plt relocation. For -fpic code, the sym
6074 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
6075 xxxxxxxx.got2.plt_pic32.<callee>. */
6076
6077 static bfd_boolean
6078 add_stub_sym (struct plt_entry *ent,
6079 struct elf_link_hash_entry *h,
6080 struct bfd_link_info *info)
6081 {
6082 struct elf_link_hash_entry *sh;
6083 size_t len1, len2, len3;
6084 char *name;
6085 const char *stub;
6086 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6087
6088 if (bfd_link_pic (info))
6089 stub = ".plt_pic32.";
6090 else
6091 stub = ".plt_call32.";
6092
6093 len1 = strlen (h->root.root.string);
6094 len2 = strlen (stub);
6095 len3 = 0;
6096 if (ent->sec)
6097 len3 = strlen (ent->sec->name);
6098 name = bfd_malloc (len1 + len2 + len3 + 9);
6099 if (name == NULL)
6100 return FALSE;
6101 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
6102 if (ent->sec)
6103 memcpy (name + 8, ent->sec->name, len3);
6104 memcpy (name + 8 + len3, stub, len2);
6105 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
6106 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
6107 if (sh == NULL)
6108 return FALSE;
6109 if (sh->root.type == bfd_link_hash_new)
6110 {
6111 sh->root.type = bfd_link_hash_defined;
6112 sh->root.u.def.section = htab->glink;
6113 sh->root.u.def.value = ent->glink_offset;
6114 sh->ref_regular = 1;
6115 sh->def_regular = 1;
6116 sh->ref_regular_nonweak = 1;
6117 sh->forced_local = 1;
6118 sh->non_elf = 0;
6119 sh->root.linker_def = 1;
6120 }
6121 return TRUE;
6122 }
6123
6124 /* Allocate NEED contiguous space in .got, and return the offset.
6125 Handles allocation of the got header when crossing 32k. */
6126
6127 static bfd_vma
6128 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
6129 {
6130 bfd_vma where;
6131 unsigned int max_before_header;
6132
6133 if (htab->plt_type == PLT_VXWORKS)
6134 {
6135 where = htab->elf.sgot->size;
6136 htab->elf.sgot->size += need;
6137 }
6138 else
6139 {
6140 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
6141 if (need <= htab->got_gap)
6142 {
6143 where = max_before_header - htab->got_gap;
6144 htab->got_gap -= need;
6145 }
6146 else
6147 {
6148 if (htab->elf.sgot->size + need > max_before_header
6149 && htab->elf.sgot->size <= max_before_header)
6150 {
6151 htab->got_gap = max_before_header - htab->elf.sgot->size;
6152 htab->elf.sgot->size = max_before_header + htab->got_header_size;
6153 }
6154 where = htab->elf.sgot->size;
6155 htab->elf.sgot->size += need;
6156 }
6157 }
6158 return where;
6159 }
6160
6161 /* Calculate size of GOT entries for symbol given its TLS_MASK.
6162 TLS_LD is excluded because those go in a special GOT slot. */
6163
6164 static inline unsigned int
6165 got_entries_needed (int tls_mask)
6166 {
6167 unsigned int need;
6168 if ((tls_mask & TLS_TLS) == 0)
6169 need = 4;
6170 else
6171 {
6172 need = 0;
6173 if ((tls_mask & TLS_GD) != 0)
6174 need += 8;
6175 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6176 need += 4;
6177 if ((tls_mask & TLS_DTPREL) != 0)
6178 need += 4;
6179 }
6180 return need;
6181 }
6182
6183 /* Calculate size of relocs needed for symbol given its TLS_MASK and
6184 NEEDed GOT entries. KNOWN says a TPREL offset can be calculated at
6185 link time. */
6186
6187 static inline unsigned int
6188 got_relocs_needed (int tls_mask, unsigned int need, bfd_boolean known)
6189 {
6190 /* All the entries we allocated need relocs.
6191 Except IE in executable with a local symbol. We could also omit
6192 the DTPREL reloc on the second word of a GD entry under the same
6193 condition as that for IE, but ld.so needs to differentiate
6194 LD and GD entries. */
6195 if (known && (tls_mask & TLS_TLS) != 0
6196 && (tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6197 need -= 4;
6198 return need * sizeof (Elf32_External_Rela) / 4;
6199 }
6200
6201 /* If H is undefined, make it dynamic if that makes sense. */
6202
6203 static bfd_boolean
6204 ensure_undef_dynamic (struct bfd_link_info *info,
6205 struct elf_link_hash_entry *h)
6206 {
6207 struct elf_link_hash_table *htab = elf_hash_table (info);
6208
6209 if (htab->dynamic_sections_created
6210 && ((info->dynamic_undefined_weak != 0
6211 && h->root.type == bfd_link_hash_undefweak)
6212 || h->root.type == bfd_link_hash_undefined)
6213 && h->dynindx == -1
6214 && !h->forced_local
6215 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
6216 return bfd_elf_link_record_dynamic_symbol (info, h);
6217 return TRUE;
6218 }
6219
6220 /* Allocate space in associated reloc sections for dynamic relocs. */
6221
6222 static bfd_boolean
6223 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6224 {
6225 struct bfd_link_info *info = inf;
6226 struct ppc_elf_link_hash_entry *eh;
6227 struct ppc_elf_link_hash_table *htab;
6228 struct elf_dyn_relocs *p;
6229 bfd_boolean dyn;
6230
6231 if (h->root.type == bfd_link_hash_indirect)
6232 return TRUE;
6233
6234 htab = ppc_elf_hash_table (info);
6235 eh = (struct ppc_elf_link_hash_entry *) h;
6236 if (eh->elf.got.refcount > 0
6237 || (ELIMINATE_COPY_RELOCS
6238 && !eh->elf.def_regular
6239 && eh->elf.protected_def
6240 && eh->has_addr16_ha
6241 && eh->has_addr16_lo
6242 && htab->params->pic_fixup > 0))
6243 {
6244 unsigned int need;
6245
6246 /* Make sure this symbol is output as a dynamic symbol. */
6247 if (!ensure_undef_dynamic (info, &eh->elf))
6248 return FALSE;
6249
6250 need = 0;
6251 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
6252 {
6253 if (!eh->elf.def_dynamic)
6254 /* We'll just use htab->tlsld_got.offset. This should
6255 always be the case. It's a little odd if we have
6256 a local dynamic reloc against a non-local symbol. */
6257 htab->tlsld_got.refcount += 1;
6258 else
6259 need += 8;
6260 }
6261 need += got_entries_needed (eh->tls_mask);
6262 if (need == 0)
6263 eh->elf.got.offset = (bfd_vma) -1;
6264 else
6265 {
6266 eh->elf.got.offset = allocate_got (htab, need);
6267 if ((bfd_link_pic (info)
6268 || (htab->elf.dynamic_sections_created
6269 && eh->elf.dynindx != -1
6270 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
6271 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
6272 {
6273 asection *rsec;
6274 bfd_boolean tprel_known = (bfd_link_executable (info)
6275 && SYMBOL_REFERENCES_LOCAL (info,
6276 &eh->elf));
6277
6278 need = got_relocs_needed (eh->tls_mask, need, tprel_known);
6279 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD)
6280 && eh->elf.def_dynamic)
6281 need -= sizeof (Elf32_External_Rela);
6282 rsec = htab->elf.srelgot;
6283 if (eh->elf.type == STT_GNU_IFUNC)
6284 rsec = htab->elf.irelplt;
6285 rsec->size += need;
6286 }
6287 }
6288 }
6289 else
6290 eh->elf.got.offset = (bfd_vma) -1;
6291
6292 /* If no dynamic sections we can't have dynamic relocs, except for
6293 IFUNCs which are handled even in static executables. */
6294 if (!htab->elf.dynamic_sections_created
6295 && h->type != STT_GNU_IFUNC)
6296 eh->dyn_relocs = NULL;
6297
6298 /* Discard relocs on undefined symbols that must be local. */
6299 else if (h->root.type == bfd_link_hash_undefined
6300 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6301 eh->dyn_relocs = NULL;
6302
6303 /* Also discard relocs on undefined weak syms with non-default
6304 visibility, or when dynamic_undefined_weak says so. */
6305 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
6306 eh->dyn_relocs = NULL;
6307
6308 if (eh->dyn_relocs == NULL)
6309 ;
6310
6311 /* In the shared -Bsymbolic case, discard space allocated for
6312 dynamic pc-relative relocs against symbols which turn out to be
6313 defined in regular objects. For the normal shared case, discard
6314 space for relocs that have become local due to symbol visibility
6315 changes. */
6316 else if (bfd_link_pic (info))
6317 {
6318 /* Relocs that use pc_count are those that appear on a call insn,
6319 or certain REL relocs (see must_be_dyn_reloc) that can be
6320 generated via assembly. We want calls to protected symbols to
6321 resolve directly to the function rather than going via the plt.
6322 If people want function pointer comparisons to work as expected
6323 then they should avoid writing weird assembly. */
6324 if (SYMBOL_CALLS_LOCAL (info, h))
6325 {
6326 struct elf_dyn_relocs **pp;
6327
6328 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6329 {
6330 p->count -= p->pc_count;
6331 p->pc_count = 0;
6332 if (p->count == 0)
6333 *pp = p->next;
6334 else
6335 pp = &p->next;
6336 }
6337 }
6338
6339 if (htab->is_vxworks)
6340 {
6341 struct elf_dyn_relocs **pp;
6342
6343 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6344 {
6345 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6346 *pp = p->next;
6347 else
6348 pp = &p->next;
6349 }
6350 }
6351
6352 if (eh->dyn_relocs != NULL)
6353 {
6354 /* Make sure this symbol is output as a dynamic symbol. */
6355 if (!ensure_undef_dynamic (info, h))
6356 return FALSE;
6357 }
6358 }
6359 else if (ELIMINATE_COPY_RELOCS)
6360 {
6361 /* For the non-pic case, discard space for relocs against
6362 symbols which turn out to need copy relocs or are not
6363 dynamic. */
6364 if (h->dynamic_adjusted
6365 && !h->def_regular
6366 && !ELF_COMMON_DEF_P (h)
6367 && !(h->protected_def
6368 && eh->has_addr16_ha
6369 && eh->has_addr16_lo
6370 && htab->params->pic_fixup > 0))
6371 {
6372 /* Make sure this symbol is output as a dynamic symbol. */
6373 if (!ensure_undef_dynamic (info, h))
6374 return FALSE;
6375
6376 if (h->dynindx == -1)
6377 eh->dyn_relocs = NULL;
6378 }
6379 else
6380 eh->dyn_relocs = NULL;
6381 }
6382
6383 /* Allocate space. */
6384 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6385 {
6386 asection *sreloc = elf_section_data (p->sec)->sreloc;
6387 if (eh->elf.type == STT_GNU_IFUNC)
6388 sreloc = htab->elf.irelplt;
6389 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6390 }
6391
6392 /* Handle PLT relocs. Done last, after dynindx has settled.
6393 We might need a PLT entry when the symbol
6394 a) is dynamic, or
6395 b) is an ifunc, or
6396 c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or
6397 d) has plt16 relocs and we are linking statically. */
6398 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6399 if (dyn
6400 || h->type == STT_GNU_IFUNC
6401 || (h->needs_plt && h->dynamic_adjusted)
6402 || (h->needs_plt
6403 && h->def_regular
6404 && !htab->elf.dynamic_sections_created
6405 && !htab->can_convert_all_inline_plt
6406 && (ppc_elf_hash_entry (h)->tls_mask
6407 & (TLS_TLS | PLT_KEEP)) == PLT_KEEP))
6408 {
6409 struct plt_entry *ent;
6410 bfd_boolean doneone = FALSE;
6411 bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
6412
6413 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6414 if (ent->plt.refcount > 0)
6415 {
6416 asection *s = htab->elf.splt;
6417
6418 if (!dyn)
6419 {
6420 if (h->type == STT_GNU_IFUNC)
6421 s = htab->elf.iplt;
6422 else
6423 s = htab->pltlocal;
6424 }
6425
6426 if (htab->plt_type == PLT_NEW || !dyn)
6427 {
6428 if (!doneone)
6429 {
6430 plt_offset = s->size;
6431 s->size += 4;
6432 }
6433 ent->plt.offset = plt_offset;
6434
6435 if (s == htab->pltlocal)
6436 ent->glink_offset = glink_offset;
6437 else
6438 {
6439 s = htab->glink;
6440 if (!doneone || bfd_link_pic (info))
6441 {
6442 glink_offset = s->size;
6443 s->size += GLINK_ENTRY_SIZE (htab, h);
6444 }
6445 if (!doneone
6446 && !bfd_link_pic (info)
6447 && h->def_dynamic
6448 && !h->def_regular)
6449 {
6450 h->root.u.def.section = s;
6451 h->root.u.def.value = glink_offset;
6452 }
6453 ent->glink_offset = glink_offset;
6454
6455 if (htab->params->emit_stub_syms
6456 && !add_stub_sym (ent, h, info))
6457 return FALSE;
6458 }
6459 }
6460 else
6461 {
6462 if (!doneone)
6463 {
6464 /* If this is the first .plt entry, make room
6465 for the special first entry. */
6466 if (s->size == 0)
6467 s->size += htab->plt_initial_entry_size;
6468
6469 /* The PowerPC PLT is actually composed of two
6470 parts, the first part is 2 words (for a load
6471 and a jump), and then there is a remaining
6472 word available at the end. */
6473 plt_offset = (htab->plt_initial_entry_size
6474 + (htab->plt_slot_size
6475 * ((s->size
6476 - htab->plt_initial_entry_size)
6477 / htab->plt_entry_size)));
6478
6479 /* If this symbol is not defined in a regular
6480 file, and we are not generating a shared
6481 library, then set the symbol to this location
6482 in the .plt. This is to avoid text
6483 relocations, and is required to make
6484 function pointers compare as equal between
6485 the normal executable and the shared library. */
6486 if (! bfd_link_pic (info)
6487 && h->def_dynamic
6488 && !h->def_regular)
6489 {
6490 h->root.u.def.section = s;
6491 h->root.u.def.value = plt_offset;
6492 }
6493
6494 /* Make room for this entry. */
6495 s->size += htab->plt_entry_size;
6496 /* After the 8192nd entry, room for two entries
6497 is allocated. */
6498 if (htab->plt_type == PLT_OLD
6499 && (s->size - htab->plt_initial_entry_size)
6500 / htab->plt_entry_size
6501 > PLT_NUM_SINGLE_ENTRIES)
6502 s->size += htab->plt_entry_size;
6503 }
6504 ent->plt.offset = plt_offset;
6505 }
6506
6507 /* We also need to make an entry in the .rela.plt section. */
6508 if (!doneone)
6509 {
6510 if (!dyn)
6511 {
6512 if (h->type == STT_GNU_IFUNC)
6513 {
6514 s = htab->elf.irelplt;
6515 s->size += sizeof (Elf32_External_Rela);
6516 }
6517 else if (bfd_link_pic (info))
6518 {
6519 s = htab->relpltlocal;
6520 s->size += sizeof (Elf32_External_Rela);
6521 }
6522 }
6523 else
6524 {
6525 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6526
6527 if (htab->plt_type == PLT_VXWORKS)
6528 {
6529 /* Allocate space for the unloaded relocations. */
6530 if (!bfd_link_pic (info)
6531 && htab->elf.dynamic_sections_created)
6532 {
6533 if (ent->plt.offset
6534 == (bfd_vma) htab->plt_initial_entry_size)
6535 {
6536 htab->srelplt2->size
6537 += (sizeof (Elf32_External_Rela)
6538 * VXWORKS_PLTRESOLVE_RELOCS);
6539 }
6540
6541 htab->srelplt2->size
6542 += (sizeof (Elf32_External_Rela)
6543 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6544 }
6545
6546 /* Every PLT entry has an associated GOT entry in
6547 .got.plt. */
6548 htab->elf.sgotplt->size += 4;
6549 }
6550 }
6551 doneone = TRUE;
6552 }
6553 }
6554 else
6555 ent->plt.offset = (bfd_vma) -1;
6556
6557 if (!doneone)
6558 {
6559 h->plt.plist = NULL;
6560 h->needs_plt = 0;
6561 }
6562 }
6563 else
6564 {
6565 h->plt.plist = NULL;
6566 h->needs_plt = 0;
6567 }
6568
6569 return TRUE;
6570 }
6571
6572 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6573 read-only sections. */
6574
6575 static bfd_boolean
6576 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6577 {
6578 asection *sec;
6579
6580 if (h->root.type == bfd_link_hash_indirect)
6581 return TRUE;
6582
6583 sec = readonly_dynrelocs (h);
6584 if (sec != NULL)
6585 {
6586 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
6587
6588 info->flags |= DF_TEXTREL;
6589 info->callbacks->minfo
6590 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
6591 sec->owner, h->root.root.string, sec);
6592
6593 /* Not an error, just cut short the traversal. */
6594 return FALSE;
6595 }
6596 return TRUE;
6597 }
6598
6599 static const unsigned char glink_eh_frame_cie[] =
6600 {
6601 0, 0, 0, 16, /* length. */
6602 0, 0, 0, 0, /* id. */
6603 1, /* CIE version. */
6604 'z', 'R', 0, /* Augmentation string. */
6605 4, /* Code alignment. */
6606 0x7c, /* Data alignment. */
6607 65, /* RA reg. */
6608 1, /* Augmentation size. */
6609 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6610 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6611 };
6612
6613 /* Set the sizes of the dynamic sections. */
6614
6615 static bfd_boolean
6616 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6617 struct bfd_link_info *info)
6618 {
6619 struct ppc_elf_link_hash_table *htab;
6620 asection *s;
6621 bfd_boolean relocs;
6622 bfd *ibfd;
6623
6624 #ifdef DEBUG
6625 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6626 #endif
6627
6628 htab = ppc_elf_hash_table (info);
6629 BFD_ASSERT (htab->elf.dynobj != NULL);
6630
6631 if (elf_hash_table (info)->dynamic_sections_created)
6632 {
6633 /* Set the contents of the .interp section to the interpreter. */
6634 if (bfd_link_executable (info) && !info->nointerp)
6635 {
6636 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6637 BFD_ASSERT (s != NULL);
6638 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6639 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6640 }
6641 }
6642
6643 if (htab->plt_type == PLT_OLD)
6644 htab->got_header_size = 16;
6645 else if (htab->plt_type == PLT_NEW)
6646 htab->got_header_size = 12;
6647
6648 /* Set up .got offsets for local syms, and space for local dynamic
6649 relocs. */
6650 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6651 {
6652 bfd_signed_vma *local_got;
6653 bfd_signed_vma *end_local_got;
6654 struct plt_entry **local_plt;
6655 struct plt_entry **end_local_plt;
6656 char *lgot_masks;
6657 bfd_size_type locsymcount;
6658 Elf_Internal_Shdr *symtab_hdr;
6659
6660 if (!is_ppc_elf (ibfd))
6661 continue;
6662
6663 for (s = ibfd->sections; s != NULL; s = s->next)
6664 {
6665 struct ppc_dyn_relocs *p;
6666
6667 for (p = ((struct ppc_dyn_relocs *)
6668 elf_section_data (s)->local_dynrel);
6669 p != NULL;
6670 p = p->next)
6671 {
6672 if (!bfd_is_abs_section (p->sec)
6673 && bfd_is_abs_section (p->sec->output_section))
6674 {
6675 /* Input section has been discarded, either because
6676 it is a copy of a linkonce section or due to
6677 linker script /DISCARD/, so we'll be discarding
6678 the relocs too. */
6679 }
6680 else if (htab->is_vxworks
6681 && strcmp (p->sec->output_section->name,
6682 ".tls_vars") == 0)
6683 {
6684 /* Relocations in vxworks .tls_vars sections are
6685 handled specially by the loader. */
6686 }
6687 else if (p->count != 0)
6688 {
6689 asection *sreloc = elf_section_data (p->sec)->sreloc;
6690 if (p->ifunc)
6691 sreloc = htab->elf.irelplt;
6692 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6693 if ((p->sec->output_section->flags
6694 & (SEC_READONLY | SEC_ALLOC))
6695 == (SEC_READONLY | SEC_ALLOC))
6696 {
6697 info->flags |= DF_TEXTREL;
6698 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
6699 p->sec->owner, p->sec);
6700 }
6701 }
6702 }
6703 }
6704
6705 local_got = elf_local_got_refcounts (ibfd);
6706 if (!local_got)
6707 continue;
6708
6709 symtab_hdr = &elf_symtab_hdr (ibfd);
6710 locsymcount = symtab_hdr->sh_info;
6711 end_local_got = local_got + locsymcount;
6712 local_plt = (struct plt_entry **) end_local_got;
6713 end_local_plt = local_plt + locsymcount;
6714 lgot_masks = (char *) end_local_plt;
6715
6716 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6717 if (*local_got > 0)
6718 {
6719 unsigned int need;
6720 if ((*lgot_masks & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
6721 htab->tlsld_got.refcount += 1;
6722 need = got_entries_needed (*lgot_masks);
6723 if (need == 0)
6724 *local_got = (bfd_vma) -1;
6725 else
6726 {
6727 *local_got = allocate_got (htab, need);
6728 if (bfd_link_pic (info))
6729 {
6730 asection *srel;
6731 bfd_boolean tprel_known = bfd_link_executable (info);
6732
6733 need = got_relocs_needed (*lgot_masks, need, tprel_known);
6734 srel = htab->elf.srelgot;
6735 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6736 srel = htab->elf.irelplt;
6737 srel->size += need;
6738 }
6739 }
6740 }
6741 else
6742 *local_got = (bfd_vma) -1;
6743
6744 if (htab->is_vxworks)
6745 continue;
6746
6747 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6748 lgot_masks = (char *) end_local_plt;
6749 for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks)
6750 {
6751 struct plt_entry *ent;
6752 bfd_boolean doneone = FALSE;
6753 bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
6754
6755 for (ent = *local_plt; ent != NULL; ent = ent->next)
6756 if (ent->plt.refcount > 0)
6757 {
6758 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6759 s = htab->elf.iplt;
6760 else if (htab->can_convert_all_inline_plt
6761 || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)
6762 {
6763 ent->plt.offset = (bfd_vma) -1;
6764 continue;
6765 }
6766 else
6767 s = htab->pltlocal;
6768
6769 if (!doneone)
6770 {
6771 plt_offset = s->size;
6772 s->size += 4;
6773 }
6774 ent->plt.offset = plt_offset;
6775
6776 if (s != htab->pltlocal && (!doneone || bfd_link_pic (info)))
6777 {
6778 s = htab->glink;
6779 glink_offset = s->size;
6780 s->size += GLINK_ENTRY_SIZE (htab, NULL);
6781 }
6782 ent->glink_offset = glink_offset;
6783
6784 if (!doneone)
6785 {
6786 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6787 {
6788 s = htab->elf.irelplt;
6789 s->size += sizeof (Elf32_External_Rela);
6790 }
6791 else if (bfd_link_pic (info))
6792 {
6793 s = htab->relpltlocal;
6794 s->size += sizeof (Elf32_External_Rela);
6795 }
6796 doneone = TRUE;
6797 }
6798 }
6799 else
6800 ent->plt.offset = (bfd_vma) -1;
6801 }
6802 }
6803
6804 /* Allocate space for global sym dynamic relocs. */
6805 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6806
6807 if (htab->tlsld_got.refcount > 0)
6808 {
6809 htab->tlsld_got.offset = allocate_got (htab, 8);
6810 if (bfd_link_pic (info))
6811 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6812 }
6813 else
6814 htab->tlsld_got.offset = (bfd_vma) -1;
6815
6816 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6817 {
6818 unsigned int g_o_t = 32768;
6819
6820 /* If we haven't allocated the header, do so now. When we get here,
6821 for old plt/got the got size will be 0 to 32764 (not allocated),
6822 or 32780 to 65536 (header allocated). For new plt/got, the
6823 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6824 if (htab->elf.sgot->size <= 32768)
6825 {
6826 g_o_t = htab->elf.sgot->size;
6827 if (htab->plt_type == PLT_OLD)
6828 g_o_t += 4;
6829 htab->elf.sgot->size += htab->got_header_size;
6830 }
6831
6832 htab->elf.hgot->root.u.def.value = g_o_t;
6833 }
6834 if (bfd_link_pic (info))
6835 {
6836 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6837
6838 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6839 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6840 }
6841 if (info->emitrelocations)
6842 {
6843 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6844
6845 if (sda != NULL && sda->ref_regular)
6846 sda->root.u.def.section->flags |= SEC_KEEP;
6847 sda = htab->sdata[1].sym;
6848 if (sda != NULL && sda->ref_regular)
6849 sda->root.u.def.section->flags |= SEC_KEEP;
6850 }
6851
6852 if (htab->glink != NULL
6853 && htab->glink->size != 0
6854 && htab->elf.dynamic_sections_created)
6855 {
6856 htab->glink_pltresolve = htab->glink->size;
6857 /* Space for the branch table. */
6858 htab->glink->size
6859 += htab->elf.srelplt->size / (sizeof (Elf32_External_Rela) / 4) - 4;
6860 /* Pad out to align the start of PLTresolve. */
6861 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6862 ? 63 : 15);
6863 htab->glink->size += GLINK_PLTRESOLVE;
6864
6865 if (htab->params->emit_stub_syms)
6866 {
6867 struct elf_link_hash_entry *sh;
6868 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6869 TRUE, FALSE, FALSE);
6870 if (sh == NULL)
6871 return FALSE;
6872 if (sh->root.type == bfd_link_hash_new)
6873 {
6874 sh->root.type = bfd_link_hash_defined;
6875 sh->root.u.def.section = htab->glink;
6876 sh->root.u.def.value = htab->glink_pltresolve;
6877 sh->ref_regular = 1;
6878 sh->def_regular = 1;
6879 sh->ref_regular_nonweak = 1;
6880 sh->forced_local = 1;
6881 sh->non_elf = 0;
6882 sh->root.linker_def = 1;
6883 }
6884 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6885 TRUE, FALSE, FALSE);
6886 if (sh == NULL)
6887 return FALSE;
6888 if (sh->root.type == bfd_link_hash_new)
6889 {
6890 sh->root.type = bfd_link_hash_defined;
6891 sh->root.u.def.section = htab->glink;
6892 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6893 sh->ref_regular = 1;
6894 sh->def_regular = 1;
6895 sh->ref_regular_nonweak = 1;
6896 sh->forced_local = 1;
6897 sh->non_elf = 0;
6898 sh->root.linker_def = 1;
6899 }
6900 }
6901 }
6902
6903 if (htab->glink != NULL
6904 && htab->glink->size != 0
6905 && htab->glink_eh_frame != NULL
6906 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6907 && _bfd_elf_eh_frame_present (info))
6908 {
6909 s = htab->glink_eh_frame;
6910 s->size = sizeof (glink_eh_frame_cie) + 20;
6911 if (bfd_link_pic (info))
6912 {
6913 s->size += 4;
6914 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6915 s->size += 4;
6916 }
6917 }
6918
6919 /* We've now determined the sizes of the various dynamic sections.
6920 Allocate memory for them. */
6921 relocs = FALSE;
6922 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6923 {
6924 bfd_boolean strip_section = TRUE;
6925
6926 if ((s->flags & SEC_LINKER_CREATED) == 0)
6927 continue;
6928
6929 if (s == htab->elf.splt
6930 || s == htab->elf.sgot)
6931 {
6932 /* We'd like to strip these sections if they aren't needed, but if
6933 we've exported dynamic symbols from them we must leave them.
6934 It's too late to tell BFD to get rid of the symbols. */
6935 if (htab->elf.hplt != NULL)
6936 strip_section = FALSE;
6937 /* Strip this section if we don't need it; see the
6938 comment below. */
6939 }
6940 else if (s == htab->elf.iplt
6941 || s == htab->pltlocal
6942 || s == htab->glink
6943 || s == htab->glink_eh_frame
6944 || s == htab->elf.sgotplt
6945 || s == htab->sbss
6946 || s == htab->elf.sdynbss
6947 || s == htab->elf.sdynrelro
6948 || s == htab->dynsbss)
6949 {
6950 /* Strip these too. */
6951 }
6952 else if (s == htab->sdata[0].section
6953 || s == htab->sdata[1].section)
6954 {
6955 strip_section = (s->flags & SEC_KEEP) == 0;
6956 }
6957 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6958 ".rela"))
6959 {
6960 if (s->size != 0)
6961 {
6962 /* Remember whether there are any relocation sections. */
6963 relocs = TRUE;
6964
6965 /* We use the reloc_count field as a counter if we need
6966 to copy relocs into the output file. */
6967 s->reloc_count = 0;
6968 }
6969 }
6970 else
6971 {
6972 /* It's not one of our sections, so don't allocate space. */
6973 continue;
6974 }
6975
6976 if (s->size == 0 && strip_section)
6977 {
6978 /* If we don't need this section, strip it from the
6979 output file. This is mostly to handle .rela.bss and
6980 .rela.plt. We must create both sections in
6981 create_dynamic_sections, because they must be created
6982 before the linker maps input sections to output
6983 sections. The linker does that before
6984 adjust_dynamic_symbol is called, and it is that
6985 function which decides whether anything needs to go
6986 into these sections. */
6987 s->flags |= SEC_EXCLUDE;
6988 continue;
6989 }
6990
6991 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6992 continue;
6993
6994 /* Allocate memory for the section contents. */
6995 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6996 if (s->contents == NULL)
6997 return FALSE;
6998 }
6999
7000 if (htab->elf.dynamic_sections_created)
7001 {
7002 /* Add some entries to the .dynamic section. We fill in the
7003 values later, in ppc_elf_finish_dynamic_sections, but we
7004 must add the entries now so that we get the correct size for
7005 the .dynamic section. The DT_DEBUG entry is filled in by the
7006 dynamic linker and used by the debugger. */
7007 #define add_dynamic_entry(TAG, VAL) \
7008 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7009
7010 if (bfd_link_executable (info))
7011 {
7012 if (!add_dynamic_entry (DT_DEBUG, 0))
7013 return FALSE;
7014 }
7015
7016 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
7017 {
7018 if (!add_dynamic_entry (DT_PLTGOT, 0)
7019 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7020 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7021 || !add_dynamic_entry (DT_JMPREL, 0))
7022 return FALSE;
7023 }
7024
7025 if (htab->plt_type == PLT_NEW
7026 && htab->glink != NULL
7027 && htab->glink->size != 0)
7028 {
7029 if (!add_dynamic_entry (DT_PPC_GOT, 0))
7030 return FALSE;
7031 if (!htab->params->no_tls_get_addr_opt
7032 && htab->tls_get_addr != NULL
7033 && htab->tls_get_addr->plt.plist != NULL
7034 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
7035 return FALSE;
7036 }
7037
7038 if (relocs)
7039 {
7040 if (!add_dynamic_entry (DT_RELA, 0)
7041 || !add_dynamic_entry (DT_RELASZ, 0)
7042 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
7043 return FALSE;
7044 }
7045
7046 /* If any dynamic relocs apply to a read-only section, then we
7047 need a DT_TEXTREL entry. */
7048 if ((info->flags & DF_TEXTREL) == 0)
7049 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
7050 info);
7051
7052 if ((info->flags & DF_TEXTREL) != 0)
7053 {
7054 if (!add_dynamic_entry (DT_TEXTREL, 0))
7055 return FALSE;
7056 }
7057 if (htab->is_vxworks
7058 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
7059 return FALSE;
7060 }
7061 #undef add_dynamic_entry
7062
7063 if (htab->glink_eh_frame != NULL
7064 && htab->glink_eh_frame->contents != NULL)
7065 {
7066 unsigned char *p = htab->glink_eh_frame->contents;
7067 bfd_vma val;
7068
7069 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
7070 /* CIE length (rewrite in case little-endian). */
7071 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
7072 p += sizeof (glink_eh_frame_cie);
7073 /* FDE length. */
7074 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
7075 bfd_put_32 (htab->elf.dynobj, val, p);
7076 p += 4;
7077 /* CIE pointer. */
7078 val = p - htab->glink_eh_frame->contents;
7079 bfd_put_32 (htab->elf.dynobj, val, p);
7080 p += 4;
7081 /* Offset to .glink. Set later. */
7082 p += 4;
7083 /* .glink size. */
7084 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
7085 p += 4;
7086 /* Augmentation. */
7087 p += 1;
7088
7089 if (bfd_link_pic (info)
7090 && htab->elf.dynamic_sections_created)
7091 {
7092 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
7093 if (adv < 64)
7094 *p++ = DW_CFA_advance_loc + adv;
7095 else if (adv < 256)
7096 {
7097 *p++ = DW_CFA_advance_loc1;
7098 *p++ = adv;
7099 }
7100 else if (adv < 65536)
7101 {
7102 *p++ = DW_CFA_advance_loc2;
7103 bfd_put_16 (htab->elf.dynobj, adv, p);
7104 p += 2;
7105 }
7106 else
7107 {
7108 *p++ = DW_CFA_advance_loc4;
7109 bfd_put_32 (htab->elf.dynobj, adv, p);
7110 p += 4;
7111 }
7112 *p++ = DW_CFA_register;
7113 *p++ = 65;
7114 p++;
7115 *p++ = DW_CFA_advance_loc + 4;
7116 *p++ = DW_CFA_restore_extended;
7117 *p++ = 65;
7118 }
7119 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
7120 == htab->glink_eh_frame->size);
7121 }
7122
7123 return TRUE;
7124 }
7125
7126 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
7127 if it looks like nothing is using them. */
7128
7129 static void
7130 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
7131 {
7132 struct elf_link_hash_entry *sda = lsect->sym;
7133
7134 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
7135 {
7136 asection *s;
7137
7138 s = bfd_get_section_by_name (output_bfd, lsect->name);
7139 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
7140 {
7141 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
7142 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
7143 {
7144 sda->def_regular = 0;
7145 /* This is somewhat magic. See elf_link_output_extsym. */
7146 sda->ref_dynamic = 1;
7147 sda->forced_local = 0;
7148 }
7149 }
7150 }
7151 }
7152
7153 void
7154 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
7155 {
7156 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7157
7158 if (htab != NULL)
7159 {
7160 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
7161 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
7162 }
7163 }
7164
7165
7166 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
7167
7168 static bfd_boolean
7169 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
7170 {
7171 if (h->plt.plist != NULL
7172 && !h->def_regular
7173 && (!h->pointer_equality_needed
7174 || !h->ref_regular_nonweak))
7175 return FALSE;
7176
7177 return _bfd_elf_hash_symbol (h);
7178 }
7179 \f
7180 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
7181
7182 /* Relaxation trampolines. r12 is available for clobbering (r11, is
7183 used for some functions that are allowed to break the ABI). */
7184 static const int shared_stub_entry[] =
7185 {
7186 0x7c0802a6, /* mflr 0 */
7187 0x429f0005, /* bcl 20, 31, .Lxxx */
7188 0x7d8802a6, /* mflr 12 */
7189 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
7190 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
7191 0x7c0803a6, /* mtlr 0 */
7192 0x7d8903a6, /* mtctr 12 */
7193 0x4e800420, /* bctr */
7194 };
7195
7196 static const int stub_entry[] =
7197 {
7198 0x3d800000, /* lis 12,xxx@ha */
7199 0x398c0000, /* addi 12,12,xxx@l */
7200 0x7d8903a6, /* mtctr 12 */
7201 0x4e800420, /* bctr */
7202 };
7203
7204 struct ppc_elf_relax_info
7205 {
7206 unsigned int workaround_size;
7207 unsigned int picfixup_size;
7208 };
7209
7210 /* This function implements long branch trampolines, and the ppc476
7211 icache bug workaround. Any section needing trampolines or patch
7212 space for the workaround has its size extended so that we can
7213 add trampolines at the end of the section. */
7214
7215 static bfd_boolean
7216 ppc_elf_relax_section (bfd *abfd,
7217 asection *isec,
7218 struct bfd_link_info *link_info,
7219 bfd_boolean *again)
7220 {
7221 struct one_branch_fixup
7222 {
7223 struct one_branch_fixup *next;
7224 asection *tsec;
7225 /* Final link, can use the symbol offset. For a
7226 relocatable link we use the symbol's index. */
7227 bfd_vma toff;
7228 bfd_vma trampoff;
7229 };
7230
7231 Elf_Internal_Shdr *symtab_hdr;
7232 bfd_byte *contents = NULL;
7233 Elf_Internal_Sym *isymbuf = NULL;
7234 Elf_Internal_Rela *internal_relocs = NULL;
7235 Elf_Internal_Rela *irel, *irelend = NULL;
7236 struct one_branch_fixup *branch_fixups = NULL;
7237 struct ppc_elf_relax_info *relax_info = NULL;
7238 unsigned changes = 0;
7239 bfd_boolean workaround_change;
7240 struct ppc_elf_link_hash_table *htab;
7241 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
7242 asection *got2;
7243 bfd_boolean maybe_pasted;
7244
7245 *again = FALSE;
7246
7247 /* No need to do anything with non-alloc or non-code sections. */
7248 if ((isec->flags & SEC_ALLOC) == 0
7249 || (isec->flags & SEC_CODE) == 0
7250 || (isec->flags & SEC_LINKER_CREATED) != 0
7251 || isec->size < 4)
7252 return TRUE;
7253
7254 /* We cannot represent the required PIC relocs in the output, so don't
7255 do anything. The linker doesn't support mixing -shared and -r
7256 anyway. */
7257 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
7258 return TRUE;
7259
7260 htab = ppc_elf_hash_table (link_info);
7261 if (htab == NULL)
7262 return TRUE;
7263
7264 isec->size = (isec->size + 3) & -4;
7265 if (isec->rawsize == 0)
7266 isec->rawsize = isec->size;
7267 trampbase = isec->size;
7268
7269 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
7270 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
7271 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
7272
7273 if (htab->params->ppc476_workaround
7274 || htab->params->pic_fixup > 0)
7275 {
7276 if (elf_section_data (isec)->sec_info == NULL)
7277 {
7278 elf_section_data (isec)->sec_info
7279 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
7280 if (elf_section_data (isec)->sec_info == NULL)
7281 return FALSE;
7282 }
7283 relax_info = elf_section_data (isec)->sec_info;
7284 trampbase -= relax_info->workaround_size;
7285 }
7286
7287 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
7288 || strcmp (isec->output_section->name, ".fini") == 0);
7289 /* Space for a branch around any trampolines. */
7290 trampoff = trampbase;
7291 if (maybe_pasted && trampbase == isec->rawsize)
7292 trampoff += 4;
7293
7294 symtab_hdr = &elf_symtab_hdr (abfd);
7295 picfixup_size = 0;
7296 if (htab->params->branch_trampolines
7297 || htab->params->pic_fixup > 0)
7298 {
7299 /* Get a copy of the native relocations. */
7300 if (isec->reloc_count != 0)
7301 {
7302 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
7303 link_info->keep_memory);
7304 if (internal_relocs == NULL)
7305 goto error_return;
7306 }
7307
7308 got2 = bfd_get_section_by_name (abfd, ".got2");
7309
7310 irelend = internal_relocs + isec->reloc_count;
7311 for (irel = internal_relocs; irel < irelend; irel++)
7312 {
7313 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7314 bfd_vma toff, roff;
7315 asection *tsec;
7316 struct one_branch_fixup *f;
7317 size_t insn_offset = 0;
7318 bfd_vma max_branch_offset = 0, val;
7319 bfd_byte *hit_addr;
7320 unsigned long t0;
7321 struct elf_link_hash_entry *h;
7322 Elf_Internal_Sym *isym;
7323 struct plt_entry **plist;
7324 unsigned char sym_type;
7325
7326 switch (r_type)
7327 {
7328 case R_PPC_REL24:
7329 case R_PPC_LOCAL24PC:
7330 case R_PPC_PLTREL24:
7331 case R_PPC_PLTCALL:
7332 max_branch_offset = 1 << 25;
7333 break;
7334
7335 case R_PPC_REL14:
7336 case R_PPC_REL14_BRTAKEN:
7337 case R_PPC_REL14_BRNTAKEN:
7338 max_branch_offset = 1 << 15;
7339 break;
7340
7341 case R_PPC_ADDR16_HA:
7342 if (htab->params->pic_fixup > 0)
7343 break;
7344 continue;
7345
7346 default:
7347 continue;
7348 }
7349
7350 /* Get the value of the symbol referred to by the reloc. */
7351 if (!get_sym_h (&h, &isym, &tsec, NULL, &isymbuf,
7352 ELF32_R_SYM (irel->r_info), abfd))
7353 goto error_return;
7354
7355 if (isym != NULL)
7356 {
7357 if (tsec != NULL)
7358 ;
7359 else if (isym->st_shndx == SHN_UNDEF)
7360 tsec = bfd_und_section_ptr;
7361 else if (isym->st_shndx == SHN_ABS)
7362 tsec = bfd_abs_section_ptr;
7363 else if (isym->st_shndx == SHN_COMMON)
7364 tsec = bfd_com_section_ptr;
7365
7366 toff = isym->st_value;
7367 sym_type = ELF_ST_TYPE (isym->st_info);
7368 }
7369 else
7370 {
7371 if (tsec != NULL)
7372 toff = h->root.u.def.value;
7373 else if (h->root.type == bfd_link_hash_undefined
7374 || h->root.type == bfd_link_hash_undefweak)
7375 {
7376 unsigned long indx;
7377
7378 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7379 tsec = bfd_und_section_ptr;
7380 toff = bfd_link_relocatable (link_info) ? indx : 0;
7381 }
7382 else
7383 continue;
7384
7385 /* If this branch is to __tls_get_addr then we may later
7386 optimise away the call. We won't be needing a long-
7387 branch stub in that case. */
7388 if (bfd_link_executable (link_info)
7389 && h == htab->tls_get_addr
7390 && irel != internal_relocs)
7391 {
7392 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7393 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7394 unsigned int tls_mask = 0;
7395
7396 /* The previous reloc should be one of R_PPC_TLSGD or
7397 R_PPC_TLSLD, or for older object files, a reloc
7398 on the __tls_get_addr arg setup insn. Get tls
7399 mask bits from the symbol on that reloc. */
7400 if (t_symndx < symtab_hdr->sh_info)
7401 {
7402 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7403
7404 if (local_got_offsets != NULL)
7405 {
7406 struct plt_entry **local_plt = (struct plt_entry **)
7407 (local_got_offsets + symtab_hdr->sh_info);
7408 char *lgot_masks = (char *)
7409 (local_plt + symtab_hdr->sh_info);
7410 tls_mask = lgot_masks[t_symndx];
7411 }
7412 }
7413 else
7414 {
7415 struct elf_link_hash_entry *th
7416 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7417
7418 while (th->root.type == bfd_link_hash_indirect
7419 || th->root.type == bfd_link_hash_warning)
7420 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7421
7422 tls_mask
7423 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7424 }
7425
7426 /* The mask bits tell us if the call will be
7427 optimised away. */
7428 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7429 && (t_rtype == R_PPC_TLSGD
7430 || t_rtype == R_PPC_GOT_TLSGD16
7431 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7432 continue;
7433 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7434 && (t_rtype == R_PPC_TLSLD
7435 || t_rtype == R_PPC_GOT_TLSLD16
7436 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7437 continue;
7438 }
7439
7440 sym_type = h->type;
7441 }
7442
7443 if (r_type == R_PPC_ADDR16_HA)
7444 {
7445 if (h != NULL
7446 && !h->def_regular
7447 && h->protected_def
7448 && ppc_elf_hash_entry (h)->has_addr16_ha
7449 && ppc_elf_hash_entry (h)->has_addr16_lo)
7450 picfixup_size += 12;
7451 continue;
7452 }
7453
7454 /* The condition here under which we call find_plt_ent must
7455 match that in relocate_section. If we call find_plt_ent here
7456 but not in relocate_section, or vice versa, then the branch
7457 destination used here may be incorrect. */
7458 plist = NULL;
7459 if (h != NULL)
7460 {
7461 /* We know is_branch_reloc (r_type) is true. */
7462 if (h->type == STT_GNU_IFUNC
7463 || r_type == R_PPC_PLTREL24)
7464 plist = &h->plt.plist;
7465 }
7466 else if (sym_type == STT_GNU_IFUNC
7467 && elf_local_got_offsets (abfd) != NULL)
7468 {
7469 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7470 struct plt_entry **local_plt = (struct plt_entry **)
7471 (local_got_offsets + symtab_hdr->sh_info);
7472 plist = local_plt + ELF32_R_SYM (irel->r_info);
7473 }
7474 if (plist != NULL)
7475 {
7476 bfd_vma addend = 0;
7477 struct plt_entry *ent;
7478
7479 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7480 addend = irel->r_addend;
7481 ent = find_plt_ent (plist, got2, addend);
7482 if (ent != NULL)
7483 {
7484 if (htab->plt_type == PLT_NEW
7485 || h == NULL
7486 || !htab->elf.dynamic_sections_created
7487 || h->dynindx == -1)
7488 {
7489 tsec = htab->glink;
7490 toff = ent->glink_offset;
7491 }
7492 else
7493 {
7494 tsec = htab->elf.splt;
7495 toff = ent->plt.offset;
7496 }
7497 }
7498 }
7499
7500 /* If the branch and target are in the same section, you have
7501 no hope of adding stubs. We'll error out later should the
7502 branch overflow. */
7503 if (tsec == isec)
7504 continue;
7505
7506 /* There probably isn't any reason to handle symbols in
7507 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7508 attribute for a code section, and we are only looking at
7509 branches. However, implement it correctly here as a
7510 reference for other target relax_section functions. */
7511 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7512 {
7513 /* At this stage in linking, no SEC_MERGE symbol has been
7514 adjusted, so all references to such symbols need to be
7515 passed through _bfd_merged_section_offset. (Later, in
7516 relocate_section, all SEC_MERGE symbols *except* for
7517 section symbols have been adjusted.)
7518
7519 gas may reduce relocations against symbols in SEC_MERGE
7520 sections to a relocation against the section symbol when
7521 the original addend was zero. When the reloc is against
7522 a section symbol we should include the addend in the
7523 offset passed to _bfd_merged_section_offset, since the
7524 location of interest is the original symbol. On the
7525 other hand, an access to "sym+addend" where "sym" is not
7526 a section symbol should not include the addend; Such an
7527 access is presumed to be an offset from "sym"; The
7528 location of interest is just "sym". */
7529 if (sym_type == STT_SECTION)
7530 toff += irel->r_addend;
7531
7532 toff
7533 = _bfd_merged_section_offset (abfd, &tsec,
7534 elf_section_data (tsec)->sec_info,
7535 toff);
7536
7537 if (sym_type != STT_SECTION)
7538 toff += irel->r_addend;
7539 }
7540 /* PLTREL24 addends are special. */
7541 else if (r_type != R_PPC_PLTREL24)
7542 toff += irel->r_addend;
7543
7544 /* Attempted -shared link of non-pic code loses. */
7545 if ((!bfd_link_relocatable (link_info)
7546 && tsec == bfd_und_section_ptr)
7547 || tsec->output_section == NULL
7548 || (tsec->owner != NULL
7549 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7550 continue;
7551
7552 roff = irel->r_offset;
7553
7554 /* If the branch is in range, no need to do anything. */
7555 if (tsec != bfd_und_section_ptr
7556 && (!bfd_link_relocatable (link_info)
7557 /* A relocatable link may have sections moved during
7558 final link, so do not presume they remain in range. */
7559 || tsec->output_section == isec->output_section))
7560 {
7561 bfd_vma symaddr, reladdr;
7562
7563 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7564 reladdr = isec->output_section->vma + isec->output_offset + roff;
7565 if (symaddr - reladdr + max_branch_offset
7566 < 2 * max_branch_offset)
7567 continue;
7568 }
7569
7570 /* Look for an existing fixup to this address. */
7571 for (f = branch_fixups; f ; f = f->next)
7572 if (f->tsec == tsec && f->toff == toff)
7573 break;
7574
7575 if (f == NULL)
7576 {
7577 size_t size;
7578 unsigned long stub_rtype;
7579
7580 val = trampoff - roff;
7581 if (val >= max_branch_offset)
7582 /* Oh dear, we can't reach a trampoline. Don't try to add
7583 one. We'll report an error later. */
7584 continue;
7585
7586 if (bfd_link_pic (link_info))
7587 {
7588 size = 4 * ARRAY_SIZE (shared_stub_entry);
7589 insn_offset = 12;
7590 }
7591 else
7592 {
7593 size = 4 * ARRAY_SIZE (stub_entry);
7594 insn_offset = 0;
7595 }
7596 stub_rtype = R_PPC_RELAX;
7597 if (tsec == htab->elf.splt
7598 || tsec == htab->glink)
7599 {
7600 stub_rtype = R_PPC_RELAX_PLT;
7601 if (r_type == R_PPC_PLTREL24)
7602 stub_rtype = R_PPC_RELAX_PLTREL24;
7603 }
7604
7605 /* Hijack the old relocation. Since we need two
7606 relocations for this use a "composite" reloc. */
7607 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7608 stub_rtype);
7609 irel->r_offset = trampoff + insn_offset;
7610 if (r_type == R_PPC_PLTREL24
7611 && stub_rtype != R_PPC_RELAX_PLTREL24)
7612 irel->r_addend = 0;
7613
7614 /* Record the fixup so we don't do it again this section. */
7615 f = bfd_malloc (sizeof (*f));
7616 f->next = branch_fixups;
7617 f->tsec = tsec;
7618 f->toff = toff;
7619 f->trampoff = trampoff;
7620 branch_fixups = f;
7621
7622 trampoff += size;
7623 changes++;
7624 }
7625 else
7626 {
7627 val = f->trampoff - roff;
7628 if (val >= max_branch_offset)
7629 continue;
7630
7631 /* Nop out the reloc, since we're finalizing things here. */
7632 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7633 }
7634
7635 /* Get the section contents. */
7636 if (contents == NULL)
7637 {
7638 /* Get cached copy if it exists. */
7639 if (elf_section_data (isec)->this_hdr.contents != NULL)
7640 contents = elf_section_data (isec)->this_hdr.contents;
7641 /* Go get them off disk. */
7642 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7643 goto error_return;
7644 }
7645
7646 /* Fix up the existing branch to hit the trampoline. */
7647 hit_addr = contents + roff;
7648 switch (r_type)
7649 {
7650 case R_PPC_REL24:
7651 case R_PPC_LOCAL24PC:
7652 case R_PPC_PLTREL24:
7653 t0 = bfd_get_32 (abfd, hit_addr);
7654 t0 &= ~0x3fffffc;
7655 t0 |= val & 0x3fffffc;
7656 bfd_put_32 (abfd, t0, hit_addr);
7657 break;
7658
7659 case R_PPC_REL14:
7660 case R_PPC_REL14_BRTAKEN:
7661 case R_PPC_REL14_BRNTAKEN:
7662 t0 = bfd_get_32 (abfd, hit_addr);
7663 t0 &= ~0xfffc;
7664 t0 |= val & 0xfffc;
7665 bfd_put_32 (abfd, t0, hit_addr);
7666 break;
7667 }
7668 }
7669
7670 while (branch_fixups != NULL)
7671 {
7672 struct one_branch_fixup *f = branch_fixups;
7673 branch_fixups = branch_fixups->next;
7674 free (f);
7675 }
7676 }
7677
7678 workaround_change = FALSE;
7679 newsize = trampoff;
7680 if (htab->params->ppc476_workaround
7681 && (!bfd_link_relocatable (link_info)
7682 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7683 {
7684 bfd_vma addr, end_addr;
7685 unsigned int crossings;
7686 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7687
7688 addr = isec->output_section->vma + isec->output_offset;
7689 end_addr = addr + trampoff;
7690 addr &= -pagesize;
7691 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7692 if (crossings != 0)
7693 {
7694 /* Keep space aligned, to ensure the patch code itself does
7695 not cross a page. Don't decrease size calculated on a
7696 previous pass as otherwise we might never settle on a layout. */
7697 newsize = 15 - ((end_addr - 1) & 15);
7698 newsize += crossings * 16;
7699 if (relax_info->workaround_size < newsize)
7700 {
7701 relax_info->workaround_size = newsize;
7702 workaround_change = TRUE;
7703 }
7704 /* Ensure relocate_section is called. */
7705 isec->flags |= SEC_RELOC;
7706 }
7707 newsize = trampoff + relax_info->workaround_size;
7708 }
7709
7710 if (htab->params->pic_fixup > 0)
7711 {
7712 picfixup_size -= relax_info->picfixup_size;
7713 if (picfixup_size != 0)
7714 relax_info->picfixup_size += picfixup_size;
7715 newsize += relax_info->picfixup_size;
7716 }
7717
7718 if (changes != 0 || picfixup_size != 0 || workaround_change)
7719 isec->size = newsize;
7720
7721 if (isymbuf != NULL
7722 && symtab_hdr->contents != (unsigned char *) isymbuf)
7723 {
7724 if (! link_info->keep_memory)
7725 free (isymbuf);
7726 else
7727 {
7728 /* Cache the symbols for elf_link_input_bfd. */
7729 symtab_hdr->contents = (unsigned char *) isymbuf;
7730 }
7731 }
7732
7733 if (contents != NULL
7734 && elf_section_data (isec)->this_hdr.contents != contents)
7735 {
7736 if (!changes && !link_info->keep_memory)
7737 free (contents);
7738 else
7739 {
7740 /* Cache the section contents for elf_link_input_bfd. */
7741 elf_section_data (isec)->this_hdr.contents = contents;
7742 }
7743 }
7744
7745 changes += picfixup_size;
7746 if (changes != 0)
7747 {
7748 /* Append sufficient NOP relocs so we can write out relocation
7749 information for the trampolines. */
7750 Elf_Internal_Shdr *rel_hdr;
7751 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7752 * sizeof (*new_relocs));
7753 unsigned ix;
7754
7755 if (!new_relocs)
7756 goto error_return;
7757 memcpy (new_relocs, internal_relocs,
7758 isec->reloc_count * sizeof (*new_relocs));
7759 for (ix = changes; ix--;)
7760 {
7761 irel = new_relocs + ix + isec->reloc_count;
7762
7763 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7764 }
7765 if (internal_relocs != elf_section_data (isec)->relocs)
7766 free (internal_relocs);
7767 elf_section_data (isec)->relocs = new_relocs;
7768 isec->reloc_count += changes;
7769 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7770 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7771 }
7772 else if (internal_relocs != NULL
7773 && elf_section_data (isec)->relocs != internal_relocs)
7774 free (internal_relocs);
7775
7776 *again = changes != 0 || workaround_change;
7777 return TRUE;
7778
7779 error_return:
7780 while (branch_fixups != NULL)
7781 {
7782 struct one_branch_fixup *f = branch_fixups;
7783 branch_fixups = branch_fixups->next;
7784 free (f);
7785 }
7786 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7787 free (isymbuf);
7788 if (contents != NULL
7789 && elf_section_data (isec)->this_hdr.contents != contents)
7790 free (contents);
7791 if (internal_relocs != NULL
7792 && elf_section_data (isec)->relocs != internal_relocs)
7793 free (internal_relocs);
7794 return FALSE;
7795 }
7796 \f
7797 /* What to do when ld finds relocations against symbols defined in
7798 discarded sections. */
7799
7800 static unsigned int
7801 ppc_elf_action_discarded (asection *sec)
7802 {
7803 if (strcmp (".fixup", sec->name) == 0)
7804 return 0;
7805
7806 if (strcmp (".got2", sec->name) == 0)
7807 return 0;
7808
7809 return _bfd_elf_default_action_discarded (sec);
7810 }
7811 \f
7812 /* Fill in the address for a pointer generated in a linker section. */
7813
7814 static bfd_vma
7815 elf_finish_pointer_linker_section (bfd *input_bfd,
7816 elf_linker_section_t *lsect,
7817 struct elf_link_hash_entry *h,
7818 bfd_vma relocation,
7819 const Elf_Internal_Rela *rel)
7820 {
7821 elf_linker_section_pointers_t *linker_section_ptr;
7822
7823 BFD_ASSERT (lsect != NULL);
7824
7825 if (h != NULL)
7826 {
7827 /* Handle global symbol. */
7828 struct ppc_elf_link_hash_entry *eh;
7829
7830 eh = (struct ppc_elf_link_hash_entry *) h;
7831 BFD_ASSERT (eh->elf.def_regular);
7832 linker_section_ptr = eh->linker_section_pointer;
7833 }
7834 else
7835 {
7836 /* Handle local symbol. */
7837 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7838
7839 BFD_ASSERT (is_ppc_elf (input_bfd));
7840 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7841 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7842 }
7843
7844 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7845 rel->r_addend,
7846 lsect);
7847 BFD_ASSERT (linker_section_ptr != NULL);
7848
7849 /* Offset will always be a multiple of four, so use the bottom bit
7850 as a "written" flag. */
7851 if ((linker_section_ptr->offset & 1) == 0)
7852 {
7853 bfd_put_32 (lsect->section->owner,
7854 relocation + linker_section_ptr->addend,
7855 lsect->section->contents + linker_section_ptr->offset);
7856 linker_section_ptr->offset += 1;
7857 }
7858
7859 relocation = (lsect->section->output_section->vma
7860 + lsect->section->output_offset
7861 + linker_section_ptr->offset - 1
7862 - SYM_VAL (lsect->sym));
7863
7864 #ifdef DEBUG
7865 fprintf (stderr,
7866 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7867 lsect->name, (long) relocation, (long) relocation);
7868 #endif
7869
7870 return relocation;
7871 }
7872
7873 #define PPC_LO(v) ((v) & 0xffff)
7874 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7875 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7876
7877 static void
7878 write_glink_stub (struct elf_link_hash_entry *h, struct plt_entry *ent,
7879 asection *plt_sec, unsigned char *p,
7880 struct bfd_link_info *info)
7881 {
7882 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7883 bfd *output_bfd = info->output_bfd;
7884 bfd_vma plt;
7885 unsigned char *end = p + GLINK_ENTRY_SIZE (htab, h);
7886
7887 if (h != NULL
7888 && h == htab->tls_get_addr
7889 && !htab->params->no_tls_get_addr_opt)
7890 {
7891 bfd_put_32 (output_bfd, LWZ_11_3, p);
7892 p += 4;
7893 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
7894 p += 4;
7895 bfd_put_32 (output_bfd, MR_0_3, p);
7896 p += 4;
7897 bfd_put_32 (output_bfd, CMPWI_11_0, p);
7898 p += 4;
7899 bfd_put_32 (output_bfd, ADD_3_12_2, p);
7900 p += 4;
7901 bfd_put_32 (output_bfd, BEQLR, p);
7902 p += 4;
7903 bfd_put_32 (output_bfd, MR_3_0, p);
7904 p += 4;
7905 bfd_put_32 (output_bfd, NOP, p);
7906 p += 4;
7907 }
7908
7909 plt = ((ent->plt.offset & ~1)
7910 + plt_sec->output_section->vma
7911 + plt_sec->output_offset);
7912
7913 if (bfd_link_pic (info))
7914 {
7915 bfd_vma got = 0;
7916
7917 if (ent->addend >= 32768)
7918 got = (ent->addend
7919 + ent->sec->output_section->vma
7920 + ent->sec->output_offset);
7921 else if (htab->elf.hgot != NULL)
7922 got = SYM_VAL (htab->elf.hgot);
7923
7924 plt -= got;
7925
7926 if (plt + 0x8000 < 0x10000)
7927 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7928 else
7929 {
7930 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7931 p += 4;
7932 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7933 }
7934 }
7935 else
7936 {
7937 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7938 p += 4;
7939 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7940 }
7941 p += 4;
7942 bfd_put_32 (output_bfd, MTCTR_11, p);
7943 p += 4;
7944 bfd_put_32 (output_bfd, BCTR, p);
7945 p += 4;
7946 while (p < end)
7947 {
7948 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7949 p += 4;
7950 }
7951 }
7952
7953 /* Return true if symbol is defined statically. */
7954
7955 static bfd_boolean
7956 is_static_defined (struct elf_link_hash_entry *h)
7957 {
7958 return ((h->root.type == bfd_link_hash_defined
7959 || h->root.type == bfd_link_hash_defweak)
7960 && h->root.u.def.section != NULL
7961 && h->root.u.def.section->output_section != NULL);
7962 }
7963
7964 /* If INSN is an opcode that may be used with an @tls operand, return
7965 the transformed insn for TLS optimisation, otherwise return 0. If
7966 REG is non-zero only match an insn with RB or RA equal to REG. */
7967
7968 unsigned int
7969 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7970 {
7971 unsigned int rtra;
7972
7973 if ((insn & (0x3f << 26)) != 31 << 26)
7974 return 0;
7975
7976 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7977 rtra = insn & ((1 << 26) - (1 << 16));
7978 else if (((insn >> 16) & 0x1f) == reg)
7979 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7980 else
7981 return 0;
7982
7983 if ((insn & (0x3ff << 1)) == 266 << 1)
7984 /* add -> addi. */
7985 insn = 14 << 26;
7986 else if ((insn & (0x1f << 1)) == 23 << 1
7987 && ((insn & (0x1f << 6)) < 14 << 6
7988 || ((insn & (0x1f << 6)) >= 16 << 6
7989 && (insn & (0x1f << 6)) < 24 << 6)))
7990 /* load and store indexed -> dform. */
7991 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7992 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7993 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7994 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7995 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7996 /* lwax -> lwa. */
7997 insn = (58 << 26) | 2;
7998 else
7999 return 0;
8000 insn |= rtra;
8001 return insn;
8002 }
8003
8004 /* If INSN is an opcode that may be used with an @tprel operand, return
8005 the transformed insn for an undefined weak symbol, ie. with the
8006 thread pointer REG operand removed. Otherwise return 0. */
8007
8008 unsigned int
8009 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
8010 {
8011 if ((insn & (0x1f << 16)) == reg << 16
8012 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8013 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
8014 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8015 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8016 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8017 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8018 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8019 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8020 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8021 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8022 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8023 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8024 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8025 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8026 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8027 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8028 && (insn & 3) != 1)
8029 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8030 && ((insn & 3) == 0 || (insn & 3) == 3))))
8031 {
8032 insn &= ~(0x1f << 16);
8033 }
8034 else if ((insn & (0x1f << 21)) == reg << 21
8035 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
8036 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
8037 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
8038 {
8039 insn &= ~(0x1f << 21);
8040 insn |= (insn & (0x1f << 16)) << 5;
8041 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
8042 insn -= 2 >> 26; /* convert to ori,oris */
8043 }
8044 else
8045 insn = 0;
8046 return insn;
8047 }
8048
8049 static bfd_boolean
8050 is_insn_ds_form (unsigned int insn)
8051 {
8052 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8053 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8054 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
8055 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
8056 }
8057
8058 static bfd_boolean
8059 is_insn_dq_form (unsigned int insn)
8060 {
8061 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
8062 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8063 && (insn & 3) == 1));
8064 }
8065
8066 /* The RELOCATE_SECTION function is called by the ELF backend linker
8067 to handle the relocations for a section.
8068
8069 The relocs are always passed as Rela structures; if the section
8070 actually uses Rel structures, the r_addend field will always be
8071 zero.
8072
8073 This function is responsible for adjust the section contents as
8074 necessary, and (if using Rela relocs and generating a
8075 relocatable output file) adjusting the reloc addend as
8076 necessary.
8077
8078 This function does not have to worry about setting the reloc
8079 address or the reloc symbol index.
8080
8081 LOCAL_SYMS is a pointer to the swapped in local symbols.
8082
8083 LOCAL_SECTIONS is an array giving the section in the input file
8084 corresponding to the st_shndx field of each local symbol.
8085
8086 The global hash table entry for the global symbols can be found
8087 via elf_sym_hashes (input_bfd).
8088
8089 When generating relocatable output, this function must handle
8090 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
8091 going to be the section symbol corresponding to the output
8092 section, which means that the addend must be adjusted
8093 accordingly. */
8094
8095 static bfd_boolean
8096 ppc_elf_relocate_section (bfd *output_bfd,
8097 struct bfd_link_info *info,
8098 bfd *input_bfd,
8099 asection *input_section,
8100 bfd_byte *contents,
8101 Elf_Internal_Rela *relocs,
8102 Elf_Internal_Sym *local_syms,
8103 asection **local_sections)
8104 {
8105 Elf_Internal_Shdr *symtab_hdr;
8106 struct elf_link_hash_entry **sym_hashes;
8107 struct ppc_elf_link_hash_table *htab;
8108 Elf_Internal_Rela *rel;
8109 Elf_Internal_Rela *wrel;
8110 Elf_Internal_Rela *relend;
8111 Elf_Internal_Rela outrel;
8112 asection *got2;
8113 bfd_vma *local_got_offsets;
8114 bfd_boolean ret = TRUE;
8115 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
8116 bfd_boolean is_vxworks_tls;
8117 unsigned int picfixup_size = 0;
8118 struct ppc_elf_relax_info *relax_info = NULL;
8119
8120 #ifdef DEBUG
8121 _bfd_error_handler ("ppc_elf_relocate_section called for %pB section %pA, "
8122 "%ld relocations%s",
8123 input_bfd, input_section,
8124 (long) input_section->reloc_count,
8125 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
8126 #endif
8127
8128 got2 = bfd_get_section_by_name (input_bfd, ".got2");
8129
8130 /* Initialize howto table if not already done. */
8131 if (!ppc_elf_howto_table[R_PPC_ADDR32])
8132 ppc_elf_howto_init ();
8133
8134 htab = ppc_elf_hash_table (info);
8135 local_got_offsets = elf_local_got_offsets (input_bfd);
8136 symtab_hdr = &elf_symtab_hdr (input_bfd);
8137 sym_hashes = elf_sym_hashes (input_bfd);
8138 /* We have to handle relocations in vxworks .tls_vars sections
8139 specially, because the dynamic loader is 'weird'. */
8140 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
8141 && !strcmp (input_section->output_section->name,
8142 ".tls_vars"));
8143 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
8144 relax_info = elf_section_data (input_section)->sec_info;
8145 rel = wrel = relocs;
8146 relend = relocs + input_section->reloc_count;
8147 for (; rel < relend; wrel++, rel++)
8148 {
8149 enum elf_ppc_reloc_type r_type;
8150 bfd_vma addend;
8151 bfd_reloc_status_type r;
8152 Elf_Internal_Sym *sym;
8153 asection *sec;
8154 struct elf_link_hash_entry *h;
8155 const char *sym_name;
8156 reloc_howto_type *howto;
8157 unsigned long r_symndx;
8158 bfd_vma relocation;
8159 bfd_vma branch_bit, from;
8160 bfd_boolean unresolved_reloc, save_unresolved_reloc;
8161 bfd_boolean warned;
8162 unsigned int tls_type, tls_mask, tls_gd;
8163 struct plt_entry **ifunc, **plt_list;
8164 struct reloc_howto_struct alt_howto;
8165
8166 again:
8167 r_type = ELF32_R_TYPE (rel->r_info);
8168 sym = NULL;
8169 sec = NULL;
8170 h = NULL;
8171 unresolved_reloc = FALSE;
8172 warned = FALSE;
8173 r_symndx = ELF32_R_SYM (rel->r_info);
8174
8175 if (r_symndx < symtab_hdr->sh_info)
8176 {
8177 sym = local_syms + r_symndx;
8178 sec = local_sections[r_symndx];
8179 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
8180
8181 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
8182 }
8183 else
8184 {
8185 bfd_boolean ignored;
8186
8187 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
8188 r_symndx, symtab_hdr, sym_hashes,
8189 h, sec, relocation,
8190 unresolved_reloc, warned, ignored);
8191
8192 sym_name = h->root.root.string;
8193 }
8194
8195 if (sec != NULL && discarded_section (sec))
8196 {
8197 /* For relocs against symbols from removed linkonce sections,
8198 or sections discarded by a linker script, we just want the
8199 section contents zeroed. Avoid any special processing. */
8200 howto = NULL;
8201 if (r_type < R_PPC_max)
8202 howto = ppc_elf_howto_table[r_type];
8203
8204 _bfd_clear_contents (howto, input_bfd, input_section,
8205 contents + rel->r_offset);
8206 wrel->r_offset = rel->r_offset;
8207 wrel->r_info = 0;
8208 wrel->r_addend = 0;
8209
8210 /* For ld -r, remove relocations in debug sections against
8211 symbols defined in discarded sections. Not done for
8212 non-debug to preserve relocs in .eh_frame which the
8213 eh_frame editing code expects to be present. */
8214 if (bfd_link_relocatable (info)
8215 && (input_section->flags & SEC_DEBUGGING))
8216 wrel--;
8217
8218 continue;
8219 }
8220
8221 if (bfd_link_relocatable (info))
8222 {
8223 if (got2 != NULL
8224 && r_type == R_PPC_PLTREL24
8225 && rel->r_addend != 0)
8226 {
8227 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8228 addend specifies the GOT pointer offset within .got2. */
8229 rel->r_addend += got2->output_offset;
8230 }
8231 if (r_type != R_PPC_RELAX_PLT
8232 && r_type != R_PPC_RELAX_PLTREL24
8233 && r_type != R_PPC_RELAX)
8234 goto copy_reloc;
8235 }
8236
8237 /* TLS optimizations. Replace instruction sequences and relocs
8238 based on information we collected in tls_optimize. We edit
8239 RELOCS so that --emit-relocs will output something sensible
8240 for the final instruction stream. */
8241 tls_mask = 0;
8242 tls_gd = 0;
8243 if (h != NULL)
8244 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
8245 else if (local_got_offsets != NULL)
8246 {
8247 struct plt_entry **local_plt;
8248 char *lgot_masks;
8249 local_plt
8250 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
8251 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
8252 tls_mask = lgot_masks[r_symndx];
8253 }
8254
8255 /* Ensure reloc mapping code below stays sane. */
8256 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
8257 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
8258 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
8259 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
8260 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
8261 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
8262 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
8263 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
8264 abort ();
8265 switch (r_type)
8266 {
8267 default:
8268 break;
8269
8270 case R_PPC_GOT_TPREL16:
8271 case R_PPC_GOT_TPREL16_LO:
8272 if ((tls_mask & TLS_TLS) != 0
8273 && (tls_mask & TLS_TPREL) == 0)
8274 {
8275 bfd_vma insn;
8276
8277 insn = bfd_get_32 (input_bfd,
8278 contents + rel->r_offset - d_offset);
8279 insn &= 31 << 21;
8280 insn |= 0x3c020000; /* addis 0,2,0 */
8281 bfd_put_32 (input_bfd, insn,
8282 contents + rel->r_offset - d_offset);
8283 r_type = R_PPC_TPREL16_HA;
8284 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8285 }
8286 break;
8287
8288 case R_PPC_TLS:
8289 if ((tls_mask & TLS_TLS) != 0
8290 && (tls_mask & TLS_TPREL) == 0)
8291 {
8292 bfd_vma insn;
8293
8294 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8295 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
8296 if (insn == 0)
8297 abort ();
8298 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8299 r_type = R_PPC_TPREL16_LO;
8300 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8301
8302 /* Was PPC_TLS which sits on insn boundary, now
8303 PPC_TPREL16_LO which is at low-order half-word. */
8304 rel->r_offset += d_offset;
8305 }
8306 break;
8307
8308 case R_PPC_GOT_TLSGD16_HI:
8309 case R_PPC_GOT_TLSGD16_HA:
8310 tls_gd = TLS_TPRELGD;
8311 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8312 goto tls_gdld_hi;
8313 break;
8314
8315 case R_PPC_GOT_TLSLD16_HI:
8316 case R_PPC_GOT_TLSLD16_HA:
8317 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8318 {
8319 tls_gdld_hi:
8320 if ((tls_mask & tls_gd) != 0)
8321 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8322 + R_PPC_GOT_TPREL16);
8323 else
8324 {
8325 rel->r_offset -= d_offset;
8326 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8327 r_type = R_PPC_NONE;
8328 }
8329 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8330 }
8331 break;
8332
8333 case R_PPC_GOT_TLSGD16:
8334 case R_PPC_GOT_TLSGD16_LO:
8335 tls_gd = TLS_TPRELGD;
8336 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8337 goto tls_ldgd_opt;
8338 break;
8339
8340 case R_PPC_GOT_TLSLD16:
8341 case R_PPC_GOT_TLSLD16_LO:
8342 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8343 {
8344 unsigned int insn1, insn2;
8345 bfd_vma offset;
8346
8347 tls_ldgd_opt:
8348 offset = (bfd_vma) -1;
8349 /* If not using the newer R_PPC_TLSGD/LD to mark
8350 __tls_get_addr calls, we must trust that the call
8351 stays with its arg setup insns, ie. that the next
8352 reloc is the __tls_get_addr call associated with
8353 the current reloc. Edit both insns. */
8354 if (input_section->has_tls_get_addr_call
8355 && rel + 1 < relend
8356 && branch_reloc_hash_match (input_bfd, rel + 1,
8357 htab->tls_get_addr))
8358 offset = rel[1].r_offset;
8359 /* We read the low GOT_TLS insn because we need to keep
8360 the destination reg. It may be something other than
8361 the usual r3, and moved to r3 before the call by
8362 intervening code. */
8363 insn1 = bfd_get_32 (input_bfd,
8364 contents + rel->r_offset - d_offset);
8365 if ((tls_mask & tls_gd) != 0)
8366 {
8367 /* IE */
8368 insn1 &= (0x1f << 21) | (0x1f << 16);
8369 insn1 |= 32 << 26; /* lwz */
8370 if (offset != (bfd_vma) -1)
8371 {
8372 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8373 insn2 = 0x7c631214; /* add 3,3,2 */
8374 bfd_put_32 (input_bfd, insn2, contents + offset);
8375 }
8376 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8377 + R_PPC_GOT_TPREL16);
8378 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8379 }
8380 else
8381 {
8382 /* LE */
8383 insn1 &= 0x1f << 21;
8384 insn1 |= 0x3c020000; /* addis r,2,0 */
8385 if (tls_gd == 0)
8386 {
8387 /* Was an LD reloc. */
8388 for (r_symndx = 0;
8389 r_symndx < symtab_hdr->sh_info;
8390 r_symndx++)
8391 if (local_sections[r_symndx] == sec)
8392 break;
8393 if (r_symndx >= symtab_hdr->sh_info)
8394 r_symndx = STN_UNDEF;
8395 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8396 if (r_symndx != STN_UNDEF)
8397 rel->r_addend -= (local_syms[r_symndx].st_value
8398 + sec->output_offset
8399 + sec->output_section->vma);
8400 }
8401 r_type = R_PPC_TPREL16_HA;
8402 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8403 if (offset != (bfd_vma) -1)
8404 {
8405 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8406 rel[1].r_offset = offset + d_offset;
8407 rel[1].r_addend = rel->r_addend;
8408 insn2 = 0x38630000; /* addi 3,3,0 */
8409 bfd_put_32 (input_bfd, insn2, contents + offset);
8410 }
8411 }
8412 bfd_put_32 (input_bfd, insn1,
8413 contents + rel->r_offset - d_offset);
8414 if (tls_gd == 0)
8415 {
8416 /* We changed the symbol on an LD reloc. Start over
8417 in order to get h, sym, sec etc. right. */
8418 goto again;
8419 }
8420 }
8421 break;
8422
8423 case R_PPC_TLSGD:
8424 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
8425 && rel + 1 < relend)
8426 {
8427 unsigned int insn2;
8428 bfd_vma offset = rel->r_offset;
8429
8430 if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
8431 {
8432 bfd_put_32 (input_bfd, NOP, contents + offset);
8433 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8434 break;
8435 }
8436
8437 if ((tls_mask & TLS_TPRELGD) != 0)
8438 {
8439 /* IE */
8440 r_type = R_PPC_NONE;
8441 insn2 = 0x7c631214; /* add 3,3,2 */
8442 }
8443 else
8444 {
8445 /* LE */
8446 r_type = R_PPC_TPREL16_LO;
8447 rel->r_offset += d_offset;
8448 insn2 = 0x38630000; /* addi 3,3,0 */
8449 }
8450 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8451 bfd_put_32 (input_bfd, insn2, contents + offset);
8452 /* Zap the reloc on the _tls_get_addr call too. */
8453 BFD_ASSERT (offset == rel[1].r_offset);
8454 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8455 }
8456 break;
8457
8458 case R_PPC_TLSLD:
8459 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
8460 && rel + 1 < relend)
8461 {
8462 unsigned int insn2;
8463
8464 if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
8465 {
8466 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8467 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8468 break;
8469 }
8470
8471 for (r_symndx = 0;
8472 r_symndx < symtab_hdr->sh_info;
8473 r_symndx++)
8474 if (local_sections[r_symndx] == sec)
8475 break;
8476 if (r_symndx >= symtab_hdr->sh_info)
8477 r_symndx = STN_UNDEF;
8478 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8479 if (r_symndx != STN_UNDEF)
8480 rel->r_addend -= (local_syms[r_symndx].st_value
8481 + sec->output_offset
8482 + sec->output_section->vma);
8483
8484 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8485 rel->r_offset += d_offset;
8486 insn2 = 0x38630000; /* addi 3,3,0 */
8487 bfd_put_32 (input_bfd, insn2,
8488 contents + rel->r_offset - d_offset);
8489 /* Zap the reloc on the _tls_get_addr call too. */
8490 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8491 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8492 goto again;
8493 }
8494 break;
8495 }
8496
8497 /* Handle other relocations that tweak non-addend part of insn. */
8498 branch_bit = 0;
8499 switch (r_type)
8500 {
8501 default:
8502 break;
8503
8504 /* Branch taken prediction relocations. */
8505 case R_PPC_ADDR14_BRTAKEN:
8506 case R_PPC_REL14_BRTAKEN:
8507 branch_bit = BRANCH_PREDICT_BIT;
8508 /* Fall through. */
8509
8510 /* Branch not taken prediction relocations. */
8511 case R_PPC_ADDR14_BRNTAKEN:
8512 case R_PPC_REL14_BRNTAKEN:
8513 {
8514 unsigned int insn;
8515
8516 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8517 insn &= ~BRANCH_PREDICT_BIT;
8518 insn |= branch_bit;
8519
8520 from = (rel->r_offset
8521 + input_section->output_offset
8522 + input_section->output_section->vma);
8523
8524 /* Invert 'y' bit if not the default. */
8525 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8526 insn ^= BRANCH_PREDICT_BIT;
8527
8528 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8529 }
8530 break;
8531
8532 case R_PPC_PLT16_HA:
8533 {
8534 unsigned int insn;
8535
8536 insn = bfd_get_32 (input_bfd,
8537 contents + rel->r_offset - d_offset);
8538 if ((insn & (0x3f << 26)) == 15u << 26
8539 && (insn & (0x1f << 16)) != 0)
8540 {
8541 if (!bfd_link_pic (info))
8542 {
8543 /* Convert addis to lis. */
8544 insn &= ~(0x1f << 16);
8545 bfd_put_32 (input_bfd, insn,
8546 contents + rel->r_offset - d_offset);
8547 }
8548 }
8549 else if (bfd_link_pic (info))
8550 info->callbacks->einfo
8551 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8552 input_bfd, input_section, rel->r_offset,
8553 "R_PPC_PLT16_HA", insn);
8554 }
8555 break;
8556 }
8557
8558 if (ELIMINATE_COPY_RELOCS
8559 && h != NULL
8560 && !h->def_regular
8561 && h->protected_def
8562 && ppc_elf_hash_entry (h)->has_addr16_ha
8563 && ppc_elf_hash_entry (h)->has_addr16_lo
8564 && htab->params->pic_fixup > 0)
8565 {
8566 /* Convert lis;addi or lis;load/store accessing a protected
8567 variable defined in a shared library to PIC. */
8568 unsigned int insn;
8569
8570 if (r_type == R_PPC_ADDR16_HA)
8571 {
8572 insn = bfd_get_32 (input_bfd,
8573 contents + rel->r_offset - d_offset);
8574 if ((insn & (0x3f << 26)) == (15u << 26)
8575 && (insn & (0x1f << 16)) == 0 /* lis */)
8576 {
8577 bfd_byte *p;
8578 bfd_vma off;
8579 bfd_vma got_addr;
8580
8581 p = (contents + input_section->size
8582 - relax_info->workaround_size
8583 - relax_info->picfixup_size
8584 + picfixup_size);
8585 off = (p - contents) - (rel->r_offset - d_offset);
8586 if (off > 0x1fffffc || (off & 3) != 0)
8587 info->callbacks->einfo
8588 (_("%H: fixup branch overflow\n"),
8589 input_bfd, input_section, rel->r_offset);
8590
8591 bfd_put_32 (input_bfd, B | off,
8592 contents + rel->r_offset - d_offset);
8593 got_addr = (htab->elf.sgot->output_section->vma
8594 + htab->elf.sgot->output_offset
8595 + (h->got.offset & ~1));
8596 wrel->r_offset = (p - contents) + d_offset;
8597 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8598 wrel->r_addend = got_addr;
8599 insn &= ~0xffff;
8600 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8601 bfd_put_32 (input_bfd, insn, p);
8602
8603 /* Convert lis to lwz, loading address from GOT. */
8604 insn &= ~0xffff;
8605 insn ^= (32u ^ 15u) << 26;
8606 insn |= (insn & (0x1f << 21)) >> 5;
8607 insn |= got_addr & 0xffff;
8608 bfd_put_32 (input_bfd, insn, p + 4);
8609
8610 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8611 picfixup_size += 12;
8612
8613 /* Use one of the spare relocs, so --emit-relocs
8614 output is reasonable. */
8615 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8616 wrel++, rel++;
8617 rel->r_offset = wrel[-1].r_offset + 4;
8618 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8619 rel->r_addend = wrel[-1].r_addend;
8620
8621 /* Continue on as if we had a got reloc, to output
8622 dynamic reloc. */
8623 r_type = R_PPC_GOT16_LO;
8624 }
8625 else
8626 _bfd_error_handler
8627 /* xgettext:c-format */
8628 (_("%pB(%pA+%#" PRIx64 "): error: "
8629 "%s with unexpected instruction %#x"),
8630 input_bfd, input_section, (uint64_t) rel->r_offset,
8631 "R_PPC_ADDR16_HA", insn);
8632 }
8633 else if (r_type == R_PPC_ADDR16_LO)
8634 {
8635 insn = bfd_get_32 (input_bfd,
8636 contents + rel->r_offset - d_offset);
8637 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8638 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8639 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8640 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8641 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8642 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8643 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8644 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8645 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8646 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8647 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8648 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8649 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8650 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8651 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8652 && (insn & 3) != 1)
8653 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8654 && ((insn & 3) == 0 || (insn & 3) == 3)))
8655 {
8656 /* Arrange to apply the reloc addend, if any. */
8657 relocation = 0;
8658 unresolved_reloc = FALSE;
8659 rel->r_info = ELF32_R_INFO (0, r_type);
8660 }
8661 else
8662 _bfd_error_handler
8663 /* xgettext:c-format */
8664 (_("%pB(%pA+%#" PRIx64 "): error: "
8665 "%s with unexpected instruction %#x"),
8666 input_bfd, input_section, (uint64_t) rel->r_offset,
8667 "R_PPC_ADDR16_LO", insn);
8668 }
8669 }
8670
8671 ifunc = NULL;
8672 if (!htab->is_vxworks)
8673 {
8674 struct plt_entry *ent;
8675
8676 if (h != NULL)
8677 {
8678 if (h->type == STT_GNU_IFUNC)
8679 ifunc = &h->plt.plist;
8680 }
8681 else if (local_got_offsets != NULL
8682 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8683 {
8684 struct plt_entry **local_plt;
8685
8686 local_plt = (struct plt_entry **) (local_got_offsets
8687 + symtab_hdr->sh_info);
8688 ifunc = local_plt + r_symndx;
8689 }
8690
8691 ent = NULL;
8692 if (ifunc != NULL
8693 && (!bfd_link_pic (info)
8694 || is_branch_reloc (r_type)
8695 || r_type == R_PPC_PLT16_LO
8696 || r_type == R_PPC_PLT16_HI
8697 || r_type == R_PPC_PLT16_HA))
8698 {
8699 addend = 0;
8700 if (bfd_link_pic (info)
8701 && (r_type == R_PPC_PLTREL24
8702 || r_type == R_PPC_PLT16_LO
8703 || r_type == R_PPC_PLT16_HI
8704 || r_type == R_PPC_PLT16_HA))
8705 addend = rel->r_addend;
8706 ent = find_plt_ent (ifunc, got2, addend);
8707 }
8708 if (ent != NULL)
8709 {
8710 if (bfd_link_pic (info)
8711 && ent->sec != got2
8712 && htab->plt_type != PLT_NEW
8713 && (!htab->elf.dynamic_sections_created
8714 || h == NULL
8715 || h->dynindx == -1))
8716 {
8717 /* Uh oh, we are going to create a pic glink stub
8718 for an ifunc (here for h == NULL and later in
8719 finish_dynamic_symbol for h != NULL), and
8720 apparently are using code compiled with
8721 -mbss-plt. The difficulty is that -mbss-plt code
8722 gives no indication via a magic PLTREL24 addend
8723 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8724 is pointing into a .got2 section (and how far
8725 into .got2). */
8726 info->callbacks->einfo
8727 /* xgettext:c-format */
8728 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8729 input_bfd, input_section, rel->r_offset, sym_name);
8730 }
8731
8732 unresolved_reloc = FALSE;
8733 if (htab->plt_type == PLT_NEW
8734 || !htab->elf.dynamic_sections_created
8735 || h == NULL
8736 || h->dynindx == -1)
8737 relocation = (htab->glink->output_section->vma
8738 + htab->glink->output_offset
8739 + (ent->glink_offset & ~1));
8740 else
8741 relocation = (htab->elf.splt->output_section->vma
8742 + htab->elf.splt->output_offset
8743 + ent->plt.offset);
8744 }
8745 }
8746
8747 addend = rel->r_addend;
8748 save_unresolved_reloc = unresolved_reloc;
8749 howto = NULL;
8750 if (r_type < R_PPC_max)
8751 howto = ppc_elf_howto_table[r_type];
8752
8753 switch (r_type)
8754 {
8755 default:
8756 break;
8757
8758 case R_PPC_TPREL16_HA:
8759 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8760 {
8761 bfd_byte *p = contents + (rel->r_offset & ~3);
8762 unsigned int insn = bfd_get_32 (input_bfd, p);
8763 if ((insn & ((0x3f << 26) | 0x1f << 16))
8764 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8765 /* xgettext:c-format */
8766 info->callbacks->minfo
8767 (_("%H: warning: %s unexpected insn %#x.\n"),
8768 input_bfd, input_section, rel->r_offset, howto->name, insn);
8769 else
8770 bfd_put_32 (input_bfd, NOP, p);
8771 }
8772 break;
8773
8774 case R_PPC_TPREL16_LO:
8775 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8776 {
8777 bfd_byte *p = contents + (rel->r_offset & ~3);
8778 unsigned int insn = bfd_get_32 (input_bfd, p);
8779 insn &= ~(0x1f << 16);
8780 insn |= 2 << 16;
8781 bfd_put_32 (input_bfd, insn, p);
8782 }
8783 break;
8784 }
8785
8786 tls_type = 0;
8787 switch (r_type)
8788 {
8789 default:
8790 /* xgettext:c-format */
8791 _bfd_error_handler (_("%pB: %s unsupported"),
8792 input_bfd, howto->name);
8793
8794 bfd_set_error (bfd_error_bad_value);
8795 ret = FALSE;
8796 goto copy_reloc;
8797
8798 case R_PPC_NONE:
8799 case R_PPC_TLS:
8800 case R_PPC_TLSGD:
8801 case R_PPC_TLSLD:
8802 case R_PPC_EMB_MRKREF:
8803 case R_PPC_GNU_VTINHERIT:
8804 case R_PPC_GNU_VTENTRY:
8805 goto copy_reloc;
8806
8807 /* GOT16 relocations. Like an ADDR16 using the symbol's
8808 address in the GOT as relocation value instead of the
8809 symbol's value itself. Also, create a GOT entry for the
8810 symbol and put the symbol value there. */
8811 case R_PPC_GOT_TLSGD16:
8812 case R_PPC_GOT_TLSGD16_LO:
8813 case R_PPC_GOT_TLSGD16_HI:
8814 case R_PPC_GOT_TLSGD16_HA:
8815 tls_type = TLS_TLS | TLS_GD;
8816 goto dogot;
8817
8818 case R_PPC_GOT_TLSLD16:
8819 case R_PPC_GOT_TLSLD16_LO:
8820 case R_PPC_GOT_TLSLD16_HI:
8821 case R_PPC_GOT_TLSLD16_HA:
8822 tls_type = TLS_TLS | TLS_LD;
8823 goto dogot;
8824
8825 case R_PPC_GOT_TPREL16:
8826 case R_PPC_GOT_TPREL16_LO:
8827 case R_PPC_GOT_TPREL16_HI:
8828 case R_PPC_GOT_TPREL16_HA:
8829 tls_type = TLS_TLS | TLS_TPREL;
8830 goto dogot;
8831
8832 case R_PPC_GOT_DTPREL16:
8833 case R_PPC_GOT_DTPREL16_LO:
8834 case R_PPC_GOT_DTPREL16_HI:
8835 case R_PPC_GOT_DTPREL16_HA:
8836 tls_type = TLS_TLS | TLS_DTPREL;
8837 goto dogot;
8838
8839 case R_PPC_GOT16:
8840 case R_PPC_GOT16_LO:
8841 case R_PPC_GOT16_HI:
8842 case R_PPC_GOT16_HA:
8843 tls_mask = 0;
8844 dogot:
8845 {
8846 /* Relocation is to the entry for this symbol in the global
8847 offset table. */
8848 bfd_vma off;
8849 bfd_vma *offp;
8850 unsigned long indx;
8851
8852 if (htab->elf.sgot == NULL)
8853 abort ();
8854
8855 indx = 0;
8856 if (tls_type == (TLS_TLS | TLS_LD)
8857 && (h == NULL
8858 || !h->def_dynamic))
8859 offp = &htab->tlsld_got.offset;
8860 else if (h != NULL)
8861 {
8862 if (!htab->elf.dynamic_sections_created
8863 || h->dynindx == -1
8864 || SYMBOL_REFERENCES_LOCAL (info, h)
8865 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8866 /* This is actually a static link, or it is a
8867 -Bsymbolic link and the symbol is defined
8868 locally, or the symbol was forced to be local
8869 because of a version file. */
8870 ;
8871 else
8872 {
8873 indx = h->dynindx;
8874 unresolved_reloc = FALSE;
8875 }
8876 offp = &h->got.offset;
8877 }
8878 else
8879 {
8880 if (local_got_offsets == NULL)
8881 abort ();
8882 offp = &local_got_offsets[r_symndx];
8883 }
8884
8885 /* The offset must always be a multiple of 4. We use the
8886 least significant bit to record whether we have already
8887 processed this entry. */
8888 off = *offp;
8889 if ((off & 1) != 0)
8890 off &= ~1;
8891 else
8892 {
8893 unsigned int tls_m = ((tls_mask & TLS_TLS) != 0
8894 ? tls_mask & (TLS_LD | TLS_GD | TLS_DTPREL
8895 | TLS_TPREL | TLS_TPRELGD)
8896 : 0);
8897
8898 if (offp == &htab->tlsld_got.offset)
8899 tls_m = TLS_LD;
8900 else if (h == NULL
8901 || !h->def_dynamic)
8902 tls_m &= ~TLS_LD;
8903
8904 /* We might have multiple got entries for this sym.
8905 Initialize them all. */
8906 do
8907 {
8908 int tls_ty = 0;
8909
8910 if ((tls_m & TLS_LD) != 0)
8911 {
8912 tls_ty = TLS_TLS | TLS_LD;
8913 tls_m &= ~TLS_LD;
8914 }
8915 else if ((tls_m & TLS_GD) != 0)
8916 {
8917 tls_ty = TLS_TLS | TLS_GD;
8918 tls_m &= ~TLS_GD;
8919 }
8920 else if ((tls_m & TLS_DTPREL) != 0)
8921 {
8922 tls_ty = TLS_TLS | TLS_DTPREL;
8923 tls_m &= ~TLS_DTPREL;
8924 }
8925 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8926 {
8927 tls_ty = TLS_TLS | TLS_TPREL;
8928 tls_m = 0;
8929 }
8930
8931 /* Generate relocs for the dynamic linker. */
8932 if (indx != 0
8933 || (bfd_link_pic (info)
8934 && (h == NULL
8935 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8936 || offp == &htab->tlsld_got.offset)
8937 && !(tls_ty == (TLS_TLS | TLS_TPREL)
8938 && bfd_link_executable (info)
8939 && SYMBOL_REFERENCES_LOCAL (info, h))))
8940 {
8941 asection *rsec = htab->elf.srelgot;
8942 bfd_byte * loc;
8943
8944 if (ifunc != NULL)
8945 {
8946 rsec = htab->elf.irelplt;
8947 if (indx == 0)
8948 htab->local_ifunc_resolver = 1;
8949 else if (is_static_defined (h))
8950 htab->maybe_local_ifunc_resolver = 1;
8951 }
8952 outrel.r_offset = (htab->elf.sgot->output_section->vma
8953 + htab->elf.sgot->output_offset
8954 + off);
8955 outrel.r_addend = 0;
8956 if (tls_ty & (TLS_LD | TLS_GD))
8957 {
8958 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8959 if (tls_ty == (TLS_TLS | TLS_GD))
8960 {
8961 loc = rsec->contents;
8962 loc += (rsec->reloc_count++
8963 * sizeof (Elf32_External_Rela));
8964 bfd_elf32_swap_reloca_out (output_bfd,
8965 &outrel, loc);
8966 outrel.r_offset += 4;
8967 outrel.r_info
8968 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8969 }
8970 }
8971 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8972 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8973 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8974 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8975 else if (indx != 0)
8976 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8977 else if (ifunc != NULL)
8978 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8979 else
8980 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8981 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8982 {
8983 outrel.r_addend += relocation;
8984 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8985 {
8986 if (htab->elf.tls_sec == NULL)
8987 outrel.r_addend = 0;
8988 else
8989 outrel.r_addend -= htab->elf.tls_sec->vma;
8990 }
8991 }
8992 loc = rsec->contents;
8993 loc += (rsec->reloc_count++
8994 * sizeof (Elf32_External_Rela));
8995 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8996 }
8997
8998 /* Init the .got section contents if we're not
8999 emitting a reloc. */
9000 else
9001 {
9002 bfd_vma value = relocation;
9003
9004 if (tls_ty != 0)
9005 {
9006 if (htab->elf.tls_sec == NULL)
9007 value = 0;
9008 else
9009 {
9010 if (tls_ty & TLS_LD)
9011 value = 0;
9012 else
9013 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
9014 if (tls_ty & TLS_TPREL)
9015 value += DTP_OFFSET - TP_OFFSET;
9016 }
9017
9018 if (tls_ty & (TLS_LD | TLS_GD))
9019 {
9020 bfd_put_32 (input_bfd, value,
9021 htab->elf.sgot->contents + off + 4);
9022 value = 1;
9023 }
9024 }
9025 bfd_put_32 (input_bfd, value,
9026 htab->elf.sgot->contents + off);
9027 }
9028
9029 off += 4;
9030 if (tls_ty & (TLS_LD | TLS_GD))
9031 off += 4;
9032 }
9033 while (tls_m != 0);
9034
9035 off = *offp;
9036 *offp = off | 1;
9037 }
9038
9039 if (off >= (bfd_vma) -2)
9040 abort ();
9041
9042 if ((tls_type & TLS_TLS) != 0)
9043 {
9044 if (tls_type != (TLS_TLS | TLS_LD))
9045 {
9046 if ((tls_mask & TLS_LD) != 0
9047 && !(h == NULL
9048 || !h->def_dynamic))
9049 off += 8;
9050 if (tls_type != (TLS_TLS | TLS_GD))
9051 {
9052 if ((tls_mask & TLS_GD) != 0)
9053 off += 8;
9054 if (tls_type != (TLS_TLS | TLS_DTPREL))
9055 {
9056 if ((tls_mask & TLS_DTPREL) != 0)
9057 off += 4;
9058 }
9059 }
9060 }
9061 }
9062
9063 /* If here for a picfixup, we're done. */
9064 if (r_type != ELF32_R_TYPE (rel->r_info))
9065 goto copy_reloc;
9066
9067 relocation = (htab->elf.sgot->output_section->vma
9068 + htab->elf.sgot->output_offset
9069 + off
9070 - SYM_VAL (htab->elf.hgot));
9071
9072 /* Addends on got relocations don't make much sense.
9073 x+off@got is actually x@got+off, and since the got is
9074 generated by a hash table traversal, the value in the
9075 got at entry m+n bears little relation to the entry m. */
9076 if (addend != 0)
9077 info->callbacks->einfo
9078 /* xgettext:c-format */
9079 (_("%H: non-zero addend on %s reloc against `%s'\n"),
9080 input_bfd, input_section, rel->r_offset,
9081 howto->name,
9082 sym_name);
9083 }
9084 break;
9085
9086 /* Relocations that need no special processing. */
9087 case R_PPC_LOCAL24PC:
9088 /* It makes no sense to point a local relocation
9089 at a symbol not in this object. */
9090 if (unresolved_reloc)
9091 {
9092 (*info->callbacks->undefined_symbol) (info,
9093 h->root.root.string,
9094 input_bfd,
9095 input_section,
9096 rel->r_offset,
9097 TRUE);
9098 goto copy_reloc;
9099 }
9100 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
9101 {
9102 /* @local on an ifunc does not really make sense since
9103 the ifunc resolver can take you anywhere. More
9104 seriously, calls to ifuncs must go through a plt call
9105 stub, and for pic the plt call stubs uses r30 to
9106 access the PLT. The problem is that a call that is
9107 local won't have the +32k reloc addend trick marking
9108 -fPIC code, so the linker won't know whether r30 is
9109 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
9110 /* xgettext:c-format */
9111 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
9112 input_bfd, input_section, rel->r_offset,
9113 h->root.root.string);
9114 }
9115 break;
9116
9117 case R_PPC_DTPREL16:
9118 case R_PPC_DTPREL16_LO:
9119 case R_PPC_DTPREL16_HI:
9120 case R_PPC_DTPREL16_HA:
9121 if (htab->elf.tls_sec != NULL)
9122 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9123 break;
9124
9125 /* Relocations that may need to be propagated if this is a shared
9126 object. */
9127 case R_PPC_TPREL16:
9128 case R_PPC_TPREL16_LO:
9129 case R_PPC_TPREL16_HI:
9130 case R_PPC_TPREL16_HA:
9131 if (h != NULL
9132 && h->root.type == bfd_link_hash_undefweak
9133 && h->dynindx == -1)
9134 {
9135 /* Make this relocation against an undefined weak symbol
9136 resolve to zero. This is really just a tweak, since
9137 code using weak externs ought to check that they are
9138 defined before using them. */
9139 bfd_byte *p = contents + rel->r_offset - d_offset;
9140 unsigned int insn = bfd_get_32 (input_bfd, p);
9141 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
9142 if (insn != 0)
9143 bfd_put_32 (input_bfd, insn, p);
9144 break;
9145 }
9146 if (htab->elf.tls_sec != NULL)
9147 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9148 /* The TPREL16 relocs shouldn't really be used in shared
9149 libs or with non-local symbols as that will result in
9150 DT_TEXTREL being set, but support them anyway. */
9151 goto dodyn;
9152
9153 case R_PPC_TPREL32:
9154 if (htab->elf.tls_sec != NULL)
9155 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9156 goto dodyn;
9157
9158 case R_PPC_DTPREL32:
9159 if (htab->elf.tls_sec != NULL)
9160 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9161 goto dodyn;
9162
9163 case R_PPC_DTPMOD32:
9164 relocation = 1;
9165 addend = 0;
9166 goto dodyn;
9167
9168 case R_PPC_REL16:
9169 case R_PPC_REL16_LO:
9170 case R_PPC_REL16_HI:
9171 case R_PPC_REL16_HA:
9172 case R_PPC_REL16DX_HA:
9173 break;
9174
9175 case R_PPC_REL32:
9176 if (h == NULL || h == htab->elf.hgot)
9177 break;
9178 /* fall through */
9179
9180 case R_PPC_ADDR32:
9181 case R_PPC_ADDR16:
9182 case R_PPC_ADDR16_LO:
9183 case R_PPC_ADDR16_HI:
9184 case R_PPC_ADDR16_HA:
9185 case R_PPC_UADDR32:
9186 case R_PPC_UADDR16:
9187 goto dodyn;
9188
9189 case R_PPC_VLE_REL8:
9190 case R_PPC_VLE_REL15:
9191 case R_PPC_VLE_REL24:
9192 case R_PPC_REL24:
9193 case R_PPC_REL14:
9194 case R_PPC_REL14_BRTAKEN:
9195 case R_PPC_REL14_BRNTAKEN:
9196 /* If these relocations are not to a named symbol, they can be
9197 handled right here, no need to bother the dynamic linker. */
9198 if (SYMBOL_CALLS_LOCAL (info, h)
9199 || h == htab->elf.hgot)
9200 break;
9201 /* fall through */
9202
9203 case R_PPC_ADDR24:
9204 case R_PPC_ADDR14:
9205 case R_PPC_ADDR14_BRTAKEN:
9206 case R_PPC_ADDR14_BRNTAKEN:
9207 if (h != NULL && !bfd_link_pic (info))
9208 break;
9209 /* fall through */
9210
9211 dodyn:
9212 if ((input_section->flags & SEC_ALLOC) == 0
9213 || is_vxworks_tls)
9214 break;
9215
9216 if (bfd_link_pic (info)
9217 ? ((h == NULL
9218 || ppc_elf_hash_entry (h)->dyn_relocs != NULL)
9219 && ((h != NULL && pc_dynrelocs (h))
9220 || must_be_dyn_reloc (info, r_type)))
9221 : (h != NULL
9222 && ppc_elf_hash_entry (h)->dyn_relocs != NULL))
9223 {
9224 int skip;
9225 bfd_byte *loc;
9226 asection *sreloc;
9227 long indx = 0;
9228
9229 #ifdef DEBUG
9230 fprintf (stderr, "ppc_elf_relocate_section needs to "
9231 "create relocation for %s\n",
9232 (h && h->root.root.string
9233 ? h->root.root.string : "<unknown>"));
9234 #endif
9235
9236 /* When generating a shared object, these relocations
9237 are copied into the output file to be resolved at run
9238 time. */
9239 skip = 0;
9240 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
9241 input_section,
9242 rel->r_offset);
9243 if (outrel.r_offset == (bfd_vma) -1
9244 || outrel.r_offset == (bfd_vma) -2)
9245 skip = (int) outrel.r_offset;
9246 outrel.r_offset += (input_section->output_section->vma
9247 + input_section->output_offset);
9248
9249 if (skip)
9250 memset (&outrel, 0, sizeof outrel);
9251 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
9252 {
9253 indx = h->dynindx;
9254 BFD_ASSERT (indx != -1);
9255 unresolved_reloc = FALSE;
9256 outrel.r_info = ELF32_R_INFO (indx, r_type);
9257 outrel.r_addend = rel->r_addend;
9258 }
9259 else
9260 {
9261 outrel.r_addend = relocation + rel->r_addend;
9262
9263 if (r_type != R_PPC_ADDR32)
9264 {
9265 if (ifunc != NULL)
9266 {
9267 /* If we get here when building a static
9268 executable, then the libc startup function
9269 responsible for applying indirect function
9270 relocations is going to complain about
9271 the reloc type.
9272 If we get here when building a dynamic
9273 executable, it will be because we have
9274 a text relocation. The dynamic loader
9275 will set the text segment writable and
9276 non-executable to apply text relocations.
9277 So we'll segfault when trying to run the
9278 indirection function to resolve the reloc. */
9279 info->callbacks->einfo
9280 /* xgettext:c-format */
9281 (_("%H: relocation %s for indirect "
9282 "function %s unsupported\n"),
9283 input_bfd, input_section, rel->r_offset,
9284 howto->name,
9285 sym_name);
9286 ret = FALSE;
9287 }
9288 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
9289 ;
9290 else if (sec == NULL || sec->owner == NULL)
9291 {
9292 bfd_set_error (bfd_error_bad_value);
9293 ret = FALSE;
9294 }
9295 else
9296 {
9297 asection *osec;
9298
9299 /* We are turning this relocation into one
9300 against a section symbol. It would be
9301 proper to subtract the symbol's value,
9302 osec->vma, from the emitted reloc addend,
9303 but ld.so expects buggy relocs.
9304 FIXME: Why not always use a zero index? */
9305 osec = sec->output_section;
9306 indx = elf_section_data (osec)->dynindx;
9307 if (indx == 0)
9308 {
9309 osec = htab->elf.text_index_section;
9310 indx = elf_section_data (osec)->dynindx;
9311 }
9312 BFD_ASSERT (indx != 0);
9313 #ifdef DEBUG
9314 if (indx == 0)
9315 printf ("indx=%ld section=%s flags=%08x name=%s\n",
9316 indx, osec->name, osec->flags,
9317 h->root.root.string);
9318 #endif
9319 }
9320
9321 outrel.r_info = ELF32_R_INFO (indx, r_type);
9322 }
9323 else if (ifunc != NULL)
9324 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9325 else
9326 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9327 }
9328
9329 sreloc = elf_section_data (input_section)->sreloc;
9330 if (ifunc)
9331 {
9332 sreloc = htab->elf.irelplt;
9333 if (indx == 0)
9334 htab->local_ifunc_resolver = 1;
9335 else if (is_static_defined (h))
9336 htab->maybe_local_ifunc_resolver = 1;
9337 }
9338 if (sreloc == NULL)
9339 return FALSE;
9340
9341 loc = sreloc->contents;
9342 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
9343 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9344
9345 if (skip == -1)
9346 goto copy_reloc;
9347
9348 /* This reloc will be computed at runtime. Clear the memory
9349 so that it contains a predictable value for prelink. */
9350 if (!skip)
9351 {
9352 relocation = howto->pc_relative ? outrel.r_offset : 0;
9353 addend = 0;
9354 break;
9355 }
9356 }
9357 break;
9358
9359 case R_PPC_RELAX_PLT:
9360 case R_PPC_RELAX_PLTREL24:
9361 if (h != NULL)
9362 {
9363 struct plt_entry *ent;
9364 bfd_vma got2_addend = 0;
9365
9366 if (r_type == R_PPC_RELAX_PLTREL24)
9367 {
9368 if (bfd_link_pic (info))
9369 got2_addend = addend;
9370 addend = 0;
9371 }
9372 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9373 if (htab->plt_type == PLT_NEW)
9374 relocation = (htab->glink->output_section->vma
9375 + htab->glink->output_offset
9376 + ent->glink_offset);
9377 else
9378 relocation = (htab->elf.splt->output_section->vma
9379 + htab->elf.splt->output_offset
9380 + ent->plt.offset);
9381 }
9382 /* Fall through. */
9383
9384 case R_PPC_RELAX:
9385 {
9386 const int *stub;
9387 size_t size;
9388 size_t insn_offset = rel->r_offset;
9389 unsigned int insn;
9390
9391 if (bfd_link_pic (info))
9392 {
9393 relocation -= (input_section->output_section->vma
9394 + input_section->output_offset
9395 + rel->r_offset - 4);
9396 stub = shared_stub_entry;
9397 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9398 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9399 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9400 stub += 3;
9401 size = ARRAY_SIZE (shared_stub_entry) - 3;
9402 }
9403 else
9404 {
9405 stub = stub_entry;
9406 size = ARRAY_SIZE (stub_entry);
9407 }
9408
9409 relocation += addend;
9410 if (bfd_link_relocatable (info))
9411 relocation = 0;
9412
9413 /* First insn is HA, second is LO. */
9414 insn = *stub++;
9415 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9416 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9417 insn_offset += 4;
9418
9419 insn = *stub++;
9420 insn |= relocation & 0xffff;
9421 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9422 insn_offset += 4;
9423 size -= 2;
9424
9425 while (size != 0)
9426 {
9427 insn = *stub++;
9428 --size;
9429 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9430 insn_offset += 4;
9431 }
9432
9433 /* Rewrite the reloc and convert one of the trailing nop
9434 relocs to describe this relocation. */
9435 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9436 /* The relocs are at the bottom 2 bytes */
9437 wrel->r_offset = rel->r_offset + d_offset;
9438 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9439 wrel->r_addend = rel->r_addend;
9440 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9441 wrel++, rel++;
9442 wrel->r_offset += 4;
9443 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9444 }
9445 continue;
9446
9447 /* Indirect .sdata relocation. */
9448 case R_PPC_EMB_SDAI16:
9449 BFD_ASSERT (htab->sdata[0].section != NULL);
9450 if (!is_static_defined (htab->sdata[0].sym))
9451 {
9452 unresolved_reloc = TRUE;
9453 break;
9454 }
9455 relocation
9456 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9457 h, relocation, rel);
9458 addend = 0;
9459 break;
9460
9461 /* Indirect .sdata2 relocation. */
9462 case R_PPC_EMB_SDA2I16:
9463 BFD_ASSERT (htab->sdata[1].section != NULL);
9464 if (!is_static_defined (htab->sdata[1].sym))
9465 {
9466 unresolved_reloc = TRUE;
9467 break;
9468 }
9469 relocation
9470 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9471 h, relocation, rel);
9472 addend = 0;
9473 break;
9474
9475 /* Handle the TOC16 reloc. We want to use the offset within the .got
9476 section, not the actual VMA. This is appropriate when generating
9477 an embedded ELF object, for which the .got section acts like the
9478 AIX .toc section. */
9479 case R_PPC_TOC16: /* phony GOT16 relocations */
9480 if (sec == NULL || sec->output_section == NULL)
9481 {
9482 unresolved_reloc = TRUE;
9483 break;
9484 }
9485 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9486 ".got") == 0
9487 || strcmp (bfd_get_section_name (sec->owner, sec),
9488 ".cgot") == 0);
9489
9490 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9491 break;
9492
9493 case R_PPC_PLTREL24:
9494 if (h != NULL && ifunc == NULL)
9495 {
9496 struct plt_entry *ent;
9497
9498 ent = find_plt_ent (&h->plt.plist, got2,
9499 bfd_link_pic (info) ? addend : 0);
9500 if (ent == NULL
9501 || htab->elf.splt == NULL)
9502 {
9503 /* We didn't make a PLT entry for this symbol. This
9504 happens when statically linking PIC code, or when
9505 using -Bsymbolic. */
9506 }
9507 else
9508 {
9509 /* Relocation is to the entry for this symbol in the
9510 procedure linkage table. */
9511 unresolved_reloc = FALSE;
9512 if (htab->plt_type == PLT_NEW)
9513 relocation = (htab->glink->output_section->vma
9514 + htab->glink->output_offset
9515 + ent->glink_offset);
9516 else
9517 relocation = (htab->elf.splt->output_section->vma
9518 + htab->elf.splt->output_offset
9519 + ent->plt.offset);
9520 }
9521 }
9522
9523 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9524 addend specifies the GOT pointer offset within .got2.
9525 Don't apply it to the relocation field. */
9526 addend = 0;
9527 break;
9528
9529 case R_PPC_PLTSEQ:
9530 case R_PPC_PLTCALL:
9531 case R_PPC_PLT16_LO:
9532 case R_PPC_PLT16_HI:
9533 case R_PPC_PLT16_HA:
9534 plt_list = NULL;
9535 if (h != NULL)
9536 plt_list = &h->plt.plist;
9537 else if (ifunc != NULL)
9538 plt_list = ifunc;
9539 else if (local_got_offsets != NULL)
9540 {
9541 struct plt_entry **local_plt;
9542 local_plt = (struct plt_entry **) (local_got_offsets
9543 + symtab_hdr->sh_info);
9544 plt_list = local_plt + r_symndx;
9545 }
9546 unresolved_reloc = TRUE;
9547 if (plt_list != NULL)
9548 {
9549 struct plt_entry *ent;
9550
9551 ent = find_plt_ent (plt_list, got2,
9552 bfd_link_pic (info) ? addend : 0);
9553 if (ent != NULL && ent->plt.offset != (bfd_vma) -1)
9554 {
9555 asection *plt;
9556
9557 unresolved_reloc = FALSE;
9558 plt = htab->elf.splt;
9559 if (!htab->elf.dynamic_sections_created
9560 || h == NULL
9561 || h->dynindx == -1)
9562 {
9563 if (ifunc != NULL)
9564 plt = htab->elf.iplt;
9565 else
9566 plt = htab->pltlocal;
9567 }
9568 relocation = (plt->output_section->vma
9569 + plt->output_offset
9570 + ent->plt.offset);
9571 if (bfd_link_pic (info))
9572 {
9573 bfd_vma got = 0;
9574
9575 if (ent->addend >= 32768)
9576 got = (ent->addend
9577 + ent->sec->output_section->vma
9578 + ent->sec->output_offset);
9579 else
9580 got = SYM_VAL (htab->elf.hgot);
9581 relocation -= got;
9582 }
9583 }
9584 }
9585 addend = 0;
9586 break;
9587
9588 /* Relocate against _SDA_BASE_. */
9589 case R_PPC_SDAREL16:
9590 {
9591 const char *name;
9592 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9593
9594 if (sec == NULL
9595 || sec->output_section == NULL
9596 || !is_static_defined (sda))
9597 {
9598 unresolved_reloc = TRUE;
9599 break;
9600 }
9601 addend -= SYM_VAL (sda);
9602
9603 name = bfd_get_section_name (output_bfd, sec->output_section);
9604 if (!(strcmp (name, ".sdata") == 0
9605 || strcmp (name, ".sbss") == 0))
9606 {
9607 _bfd_error_handler
9608 /* xgettext:c-format */
9609 (_("%pB: the target (%s) of a %s relocation is "
9610 "in the wrong output section (%s)"),
9611 input_bfd,
9612 sym_name,
9613 howto->name,
9614 name);
9615 }
9616 }
9617 break;
9618
9619 /* Relocate against _SDA2_BASE_. */
9620 case R_PPC_EMB_SDA2REL:
9621 {
9622 const char *name;
9623 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9624
9625 if (sec == NULL
9626 || sec->output_section == NULL
9627 || !is_static_defined (sda))
9628 {
9629 unresolved_reloc = TRUE;
9630 break;
9631 }
9632 addend -= SYM_VAL (sda);
9633
9634 name = bfd_get_section_name (output_bfd, sec->output_section);
9635 if (!(strcmp (name, ".sdata2") == 0
9636 || strcmp (name, ".sbss2") == 0))
9637 {
9638 _bfd_error_handler
9639 /* xgettext:c-format */
9640 (_("%pB: the target (%s) of a %s relocation is "
9641 "in the wrong output section (%s)"),
9642 input_bfd,
9643 sym_name,
9644 howto->name,
9645 name);
9646 }
9647 }
9648 break;
9649
9650 case R_PPC_VLE_LO16A:
9651 relocation = relocation + addend;
9652 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9653 contents + rel->r_offset, relocation,
9654 split16a_type, htab->params->vle_reloc_fixup);
9655 goto copy_reloc;
9656
9657 case R_PPC_VLE_LO16D:
9658 relocation = relocation + addend;
9659 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9660 contents + rel->r_offset, relocation,
9661 split16d_type, htab->params->vle_reloc_fixup);
9662 goto copy_reloc;
9663
9664 case R_PPC_VLE_HI16A:
9665 relocation = (relocation + addend) >> 16;
9666 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9667 contents + rel->r_offset, relocation,
9668 split16a_type, htab->params->vle_reloc_fixup);
9669 goto copy_reloc;
9670
9671 case R_PPC_VLE_HI16D:
9672 relocation = (relocation + addend) >> 16;
9673 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9674 contents + rel->r_offset, relocation,
9675 split16d_type, htab->params->vle_reloc_fixup);
9676 goto copy_reloc;
9677
9678 case R_PPC_VLE_HA16A:
9679 relocation = (relocation + addend + 0x8000) >> 16;
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_HA16D:
9686 relocation = (relocation + addend + 0x8000) >> 16;
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 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9693 case R_PPC_EMB_SDA21:
9694 case R_PPC_VLE_SDA21:
9695 case R_PPC_EMB_RELSDA:
9696 case R_PPC_VLE_SDA21_LO:
9697 {
9698 const char *name;
9699 int reg;
9700 unsigned int insn;
9701 struct elf_link_hash_entry *sda = NULL;
9702
9703 if (sec == NULL || sec->output_section == NULL)
9704 {
9705 unresolved_reloc = TRUE;
9706 break;
9707 }
9708
9709 name = bfd_get_section_name (output_bfd, sec->output_section);
9710 if (strcmp (name, ".sdata") == 0
9711 || strcmp (name, ".sbss") == 0)
9712 {
9713 reg = 13;
9714 sda = htab->sdata[0].sym;
9715 }
9716 else if (strcmp (name, ".sdata2") == 0
9717 || strcmp (name, ".sbss2") == 0)
9718 {
9719 reg = 2;
9720 sda = htab->sdata[1].sym;
9721 }
9722 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9723 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9724 {
9725 reg = 0;
9726 }
9727 else
9728 {
9729 _bfd_error_handler
9730 /* xgettext:c-format */
9731 (_("%pB: the target (%s) of a %s relocation is "
9732 "in the wrong output section (%s)"),
9733 input_bfd,
9734 sym_name,
9735 howto->name,
9736 name);
9737
9738 bfd_set_error (bfd_error_bad_value);
9739 ret = FALSE;
9740 goto copy_reloc;
9741 }
9742
9743 if (sda != NULL)
9744 {
9745 if (!is_static_defined (sda))
9746 {
9747 unresolved_reloc = TRUE;
9748 break;
9749 }
9750 addend -= SYM_VAL (sda);
9751 }
9752
9753 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9754 if (reg == 0
9755 && (r_type == R_PPC_VLE_SDA21
9756 || r_type == R_PPC_VLE_SDA21_LO))
9757 {
9758 relocation = relocation + addend;
9759 addend = 0;
9760
9761 /* Force e_li insn, keeping RT from original insn. */
9762 insn &= 0x1f << 21;
9763 insn |= 28u << 26;
9764
9765 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9766 /* Top 4 bits of value to 17..20. */
9767 insn |= (relocation & 0xf0000) >> 5;
9768 /* Next 5 bits of the value to 11..15. */
9769 insn |= (relocation & 0xf800) << 5;
9770 /* And the final 11 bits of the value to bits 21 to 31. */
9771 insn |= relocation & 0x7ff;
9772
9773 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9774
9775 if (r_type == R_PPC_VLE_SDA21
9776 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9777 goto overflow;
9778 goto copy_reloc;
9779 }
9780 else if (r_type == R_PPC_EMB_SDA21
9781 || r_type == R_PPC_VLE_SDA21
9782 || r_type == R_PPC_VLE_SDA21_LO)
9783 {
9784 /* Fill in register field. */
9785 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9786 }
9787 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9788 }
9789 break;
9790
9791 case R_PPC_VLE_SDAREL_LO16A:
9792 case R_PPC_VLE_SDAREL_LO16D:
9793 case R_PPC_VLE_SDAREL_HI16A:
9794 case R_PPC_VLE_SDAREL_HI16D:
9795 case R_PPC_VLE_SDAREL_HA16A:
9796 case R_PPC_VLE_SDAREL_HA16D:
9797 {
9798 bfd_vma value;
9799 const char *name;
9800 struct elf_link_hash_entry *sda = NULL;
9801
9802 if (sec == NULL || sec->output_section == NULL)
9803 {
9804 unresolved_reloc = TRUE;
9805 break;
9806 }
9807
9808 name = bfd_get_section_name (output_bfd, sec->output_section);
9809 if (strcmp (name, ".sdata") == 0
9810 || strcmp (name, ".sbss") == 0)
9811 sda = htab->sdata[0].sym;
9812 else if (strcmp (name, ".sdata2") == 0
9813 || strcmp (name, ".sbss2") == 0)
9814 sda = htab->sdata[1].sym;
9815 else
9816 {
9817 _bfd_error_handler
9818 /* xgettext:c-format */
9819 (_("%pB: the target (%s) of a %s relocation is "
9820 "in the wrong output section (%s)"),
9821 input_bfd,
9822 sym_name,
9823 howto->name,
9824 name);
9825
9826 bfd_set_error (bfd_error_bad_value);
9827 ret = FALSE;
9828 goto copy_reloc;
9829 }
9830
9831 if (sda == NULL || !is_static_defined (sda))
9832 {
9833 unresolved_reloc = TRUE;
9834 break;
9835 }
9836 value = relocation + addend - SYM_VAL (sda);
9837
9838 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9839 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9840 contents + rel->r_offset, value,
9841 split16a_type,
9842 htab->params->vle_reloc_fixup);
9843 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9844 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9845 contents + rel->r_offset, value,
9846 split16d_type,
9847 htab->params->vle_reloc_fixup);
9848 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9849 {
9850 value = value >> 16;
9851 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9852 contents + rel->r_offset, value,
9853 split16a_type,
9854 htab->params->vle_reloc_fixup);
9855 }
9856 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9857 {
9858 value = value >> 16;
9859 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9860 contents + rel->r_offset, value,
9861 split16d_type,
9862 htab->params->vle_reloc_fixup);
9863 }
9864 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9865 {
9866 value = (value + 0x8000) >> 16;
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 }
9872 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9873 {
9874 value = (value + 0x8000) >> 16;
9875 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9876 contents + rel->r_offset, value,
9877 split16d_type,
9878 htab->params->vle_reloc_fixup);
9879 }
9880 }
9881 goto copy_reloc;
9882
9883 case R_PPC_VLE_ADDR20:
9884 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9885 continue;
9886
9887 /* Relocate against the beginning of the section. */
9888 case R_PPC_SECTOFF:
9889 case R_PPC_SECTOFF_LO:
9890 case R_PPC_SECTOFF_HI:
9891 case R_PPC_SECTOFF_HA:
9892 if (sec == NULL || sec->output_section == NULL)
9893 {
9894 unresolved_reloc = TRUE;
9895 break;
9896 }
9897 addend -= sec->output_section->vma;
9898 break;
9899
9900 /* Negative relocations. */
9901 case R_PPC_EMB_NADDR32:
9902 case R_PPC_EMB_NADDR16:
9903 case R_PPC_EMB_NADDR16_LO:
9904 case R_PPC_EMB_NADDR16_HI:
9905 case R_PPC_EMB_NADDR16_HA:
9906 addend -= 2 * relocation;
9907 break;
9908
9909 case R_PPC_COPY:
9910 case R_PPC_GLOB_DAT:
9911 case R_PPC_JMP_SLOT:
9912 case R_PPC_RELATIVE:
9913 case R_PPC_IRELATIVE:
9914 case R_PPC_PLT32:
9915 case R_PPC_PLTREL32:
9916 case R_PPC_ADDR30:
9917 case R_PPC_EMB_RELSEC16:
9918 case R_PPC_EMB_RELST_LO:
9919 case R_PPC_EMB_RELST_HI:
9920 case R_PPC_EMB_RELST_HA:
9921 case R_PPC_EMB_BIT_FLD:
9922 /* xgettext:c-format */
9923 _bfd_error_handler (_("%pB: %s unsupported"),
9924 input_bfd, howto->name);
9925
9926 bfd_set_error (bfd_error_invalid_operation);
9927 ret = FALSE;
9928 goto copy_reloc;
9929 }
9930
9931 switch (r_type)
9932 {
9933 default:
9934 break;
9935
9936 case R_PPC_PLTCALL:
9937 if (unresolved_reloc)
9938 {
9939 bfd_byte *p = contents + rel->r_offset;
9940 unsigned int insn = bfd_get_32 (input_bfd, p);
9941 insn &= 1;
9942 bfd_put_32 (input_bfd, B | insn, p);
9943 unresolved_reloc = save_unresolved_reloc;
9944 r_type = R_PPC_REL24;
9945 howto = ppc_elf_howto_table[r_type];
9946 }
9947 else if (htab->plt_type != PLT_NEW)
9948 info->callbacks->einfo
9949 (_("%P: %H: %s relocation unsupported for bss-plt\n"),
9950 input_bfd, input_section, rel->r_offset,
9951 howto->name);
9952 break;
9953
9954 case R_PPC_PLTSEQ:
9955 case R_PPC_PLT16_HA:
9956 case R_PPC_PLT16_LO:
9957 if (unresolved_reloc)
9958 {
9959 bfd_byte *p = contents + (rel->r_offset & ~3);
9960 bfd_put_32 (input_bfd, NOP, p);
9961 unresolved_reloc = FALSE;
9962 r_type = R_PPC_NONE;
9963 howto = ppc_elf_howto_table[r_type];
9964 }
9965 else if (htab->plt_type != PLT_NEW)
9966 info->callbacks->einfo
9967 (_("%P: %H: %s relocation unsupported for bss-plt\n"),
9968 input_bfd, input_section, rel->r_offset,
9969 howto->name);
9970 break;
9971 }
9972
9973 /* Do any further special processing. */
9974 switch (r_type)
9975 {
9976 default:
9977 break;
9978
9979 case R_PPC_ADDR16_HA:
9980 case R_PPC_REL16_HA:
9981 case R_PPC_REL16DX_HA:
9982 case R_PPC_SECTOFF_HA:
9983 case R_PPC_TPREL16_HA:
9984 case R_PPC_DTPREL16_HA:
9985 case R_PPC_EMB_NADDR16_HA:
9986 case R_PPC_EMB_RELST_HA:
9987 /* It's just possible that this symbol is a weak symbol
9988 that's not actually defined anywhere. In that case,
9989 'sec' would be NULL, and we should leave the symbol
9990 alone (it will be set to zero elsewhere in the link). */
9991 if (sec == NULL)
9992 break;
9993 /* Fall through. */
9994
9995 case R_PPC_PLT16_HA:
9996 case R_PPC_GOT16_HA:
9997 case R_PPC_GOT_TLSGD16_HA:
9998 case R_PPC_GOT_TLSLD16_HA:
9999 case R_PPC_GOT_TPREL16_HA:
10000 case R_PPC_GOT_DTPREL16_HA:
10001 /* Add 0x10000 if sign bit in 0:15 is set.
10002 Bits 0:15 are not used. */
10003 addend += 0x8000;
10004 break;
10005
10006 case R_PPC_ADDR16:
10007 case R_PPC_ADDR16_LO:
10008 case R_PPC_GOT16:
10009 case R_PPC_GOT16_LO:
10010 case R_PPC_SDAREL16:
10011 case R_PPC_SECTOFF:
10012 case R_PPC_SECTOFF_LO:
10013 case R_PPC_DTPREL16:
10014 case R_PPC_DTPREL16_LO:
10015 case R_PPC_TPREL16:
10016 case R_PPC_TPREL16_LO:
10017 case R_PPC_GOT_TLSGD16:
10018 case R_PPC_GOT_TLSGD16_LO:
10019 case R_PPC_GOT_TLSLD16:
10020 case R_PPC_GOT_TLSLD16_LO:
10021 case R_PPC_GOT_DTPREL16:
10022 case R_PPC_GOT_DTPREL16_LO:
10023 case R_PPC_GOT_TPREL16:
10024 case R_PPC_GOT_TPREL16_LO:
10025 {
10026 /* The 32-bit ABI lacks proper relocations to deal with
10027 certain 64-bit instructions. Prevent damage to bits
10028 that make up part of the insn opcode. */
10029 unsigned int insn, mask, lobit;
10030
10031 insn = bfd_get_32 (input_bfd,
10032 contents + rel->r_offset - d_offset);
10033 mask = 0;
10034 if (is_insn_ds_form (insn))
10035 mask = 3;
10036 else if (is_insn_dq_form (insn))
10037 mask = 15;
10038 else
10039 break;
10040 relocation += addend;
10041 addend = insn & mask;
10042 lobit = mask & relocation;
10043 if (lobit != 0)
10044 {
10045 relocation ^= lobit;
10046 info->callbacks->einfo
10047 /* xgettext:c-format */
10048 (_("%H: error: %s against `%s' not a multiple of %u\n"),
10049 input_bfd, input_section, rel->r_offset,
10050 howto->name, sym_name, mask + 1);
10051 bfd_set_error (bfd_error_bad_value);
10052 ret = FALSE;
10053 }
10054 }
10055 break;
10056 }
10057
10058 #ifdef DEBUG
10059 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
10060 "offset = %ld, addend = %ld\n",
10061 howto->name,
10062 (int) r_type,
10063 sym_name,
10064 r_symndx,
10065 (long) rel->r_offset,
10066 (long) addend);
10067 #endif
10068
10069 if (unresolved_reloc
10070 && !((input_section->flags & SEC_DEBUGGING) != 0
10071 && h->def_dynamic)
10072 && _bfd_elf_section_offset (output_bfd, info, input_section,
10073 rel->r_offset) != (bfd_vma) -1)
10074 {
10075 info->callbacks->einfo
10076 /* xgettext:c-format */
10077 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
10078 input_bfd, input_section, rel->r_offset,
10079 howto->name,
10080 sym_name);
10081 ret = FALSE;
10082 }
10083
10084 /* 16-bit fields in insns mostly have signed values, but a
10085 few insns have 16-bit unsigned values. Really, we should
10086 have different reloc types. */
10087 if (howto->complain_on_overflow != complain_overflow_dont
10088 && howto->dst_mask == 0xffff
10089 && (input_section->flags & SEC_CODE) != 0)
10090 {
10091 enum complain_overflow complain = complain_overflow_signed;
10092
10093 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
10094 {
10095 unsigned int insn;
10096
10097 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10098 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
10099 complain = complain_overflow_bitfield;
10100 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
10101 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
10102 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
10103 complain = complain_overflow_unsigned;
10104 }
10105 if (howto->complain_on_overflow != complain)
10106 {
10107 alt_howto = *howto;
10108 alt_howto.complain_on_overflow = complain;
10109 howto = &alt_howto;
10110 }
10111 }
10112
10113 if (r_type == R_PPC_REL16DX_HA)
10114 {
10115 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
10116 if (rel->r_offset + 4 > input_section->size)
10117 r = bfd_reloc_outofrange;
10118 else
10119 {
10120 unsigned int insn;
10121
10122 relocation += addend;
10123 relocation -= (rel->r_offset
10124 + input_section->output_offset
10125 + input_section->output_section->vma);
10126 relocation >>= 16;
10127 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
10128 insn &= ~0x1fffc1;
10129 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
10130 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
10131 r = bfd_reloc_ok;
10132 }
10133 }
10134 else
10135 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
10136 rel->r_offset, relocation, addend);
10137
10138 if (r != bfd_reloc_ok)
10139 {
10140 if (r == bfd_reloc_overflow)
10141 {
10142 overflow:
10143 /* On code like "if (foo) foo();" don't report overflow
10144 on a branch to zero when foo is undefined. */
10145 if (!warned
10146 && !(h != NULL
10147 && (h->root.type == bfd_link_hash_undefweak
10148 || h->root.type == bfd_link_hash_undefined)
10149 && is_branch_reloc (r_type)))
10150 info->callbacks->reloc_overflow
10151 (info, (h ? &h->root : NULL), sym_name, howto->name,
10152 rel->r_addend, input_bfd, input_section, rel->r_offset);
10153 }
10154 else
10155 {
10156 info->callbacks->einfo
10157 /* xgettext:c-format */
10158 (_("%H: %s reloc against `%s': error %d\n"),
10159 input_bfd, input_section, rel->r_offset,
10160 howto->name, sym_name, (int) r);
10161 ret = FALSE;
10162 }
10163 }
10164 copy_reloc:
10165 if (wrel != rel)
10166 *wrel = *rel;
10167 }
10168
10169 if (wrel != rel)
10170 {
10171 Elf_Internal_Shdr *rel_hdr;
10172 size_t deleted = rel - wrel;
10173
10174 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
10175 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
10176 if (rel_hdr->sh_size == 0)
10177 {
10178 /* It is too late to remove an empty reloc section. Leave
10179 one NONE reloc.
10180 ??? What is wrong with an empty section??? */
10181 rel_hdr->sh_size = rel_hdr->sh_entsize;
10182 deleted -= 1;
10183 wrel++;
10184 }
10185 relend = wrel;
10186 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
10187 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
10188 input_section->reloc_count -= deleted;
10189 }
10190
10191 #ifdef DEBUG
10192 fprintf (stderr, "\n");
10193 #endif
10194
10195 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
10196 && input_section->size != input_section->rawsize
10197 && (strcmp (input_section->output_section->name, ".init") == 0
10198 || strcmp (input_section->output_section->name, ".fini") == 0))
10199 {
10200 /* Branch around the trampolines. */
10201 unsigned int insn = B + input_section->size - input_section->rawsize;
10202 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
10203 }
10204
10205 if (htab->params->ppc476_workaround
10206 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
10207 && (!bfd_link_relocatable (info)
10208 || (input_section->output_section->alignment_power
10209 >= htab->params->pagesize_p2)))
10210 {
10211 bfd_vma start_addr, end_addr, addr;
10212 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10213
10214 if (relax_info->workaround_size != 0)
10215 {
10216 bfd_byte *p;
10217 unsigned int n;
10218 bfd_byte fill[4];
10219
10220 bfd_put_32 (input_bfd, BA, fill);
10221 p = contents + input_section->size - relax_info->workaround_size;
10222 n = relax_info->workaround_size >> 2;
10223 while (n--)
10224 {
10225 memcpy (p, fill, 4);
10226 p += 4;
10227 }
10228 }
10229
10230 /* The idea is: Replace the last instruction on a page with a
10231 branch to a patch area. Put the insn there followed by a
10232 branch back to the next page. Complicated a little by
10233 needing to handle moved conditional branches, and by not
10234 wanting to touch data-in-text. */
10235
10236 start_addr = (input_section->output_section->vma
10237 + input_section->output_offset);
10238 end_addr = (start_addr + input_section->size
10239 - relax_info->workaround_size);
10240 for (addr = ((start_addr & -pagesize) + pagesize - 4);
10241 addr < end_addr;
10242 addr += pagesize)
10243 {
10244 bfd_vma offset = addr - start_addr;
10245 Elf_Internal_Rela *lo, *hi;
10246 bfd_boolean is_data;
10247 bfd_vma patch_off, patch_addr;
10248 unsigned int insn;
10249
10250 /* Do we have a data reloc at this offset? If so, leave
10251 the word alone. */
10252 is_data = FALSE;
10253 lo = relocs;
10254 hi = relend;
10255 rel = NULL;
10256 while (lo < hi)
10257 {
10258 rel = lo + (hi - lo) / 2;
10259 if (rel->r_offset < offset)
10260 lo = rel + 1;
10261 else if (rel->r_offset > offset + 3)
10262 hi = rel;
10263 else
10264 {
10265 switch (ELF32_R_TYPE (rel->r_info))
10266 {
10267 case R_PPC_ADDR32:
10268 case R_PPC_UADDR32:
10269 case R_PPC_REL32:
10270 case R_PPC_ADDR30:
10271 is_data = TRUE;
10272 break;
10273 default:
10274 break;
10275 }
10276 break;
10277 }
10278 }
10279 if (is_data)
10280 continue;
10281
10282 /* Some instructions can be left alone too. Unconditional
10283 branches, except for bcctr with BO=0x14 (bctr, bctrl),
10284 avoid the icache failure.
10285
10286 The problem occurs due to prefetch across a page boundary
10287 where stale instructions can be fetched from the next
10288 page, and the mechanism for flushing these bad
10289 instructions fails under certain circumstances. The
10290 unconditional branches:
10291 1) Branch: b, bl, ba, bla,
10292 2) Branch Conditional: bc, bca, bcl, bcla,
10293 3) Branch Conditional to Link Register: bclr, bclrl,
10294 where (2) and (3) have BO=0x14 making them unconditional,
10295 prevent the bad prefetch because the prefetch itself is
10296 affected by these instructions. This happens even if the
10297 instruction is not executed.
10298
10299 A bctr example:
10300 .
10301 . lis 9,new_page@ha
10302 . addi 9,9,new_page@l
10303 . mtctr 9
10304 . bctr
10305 . nop
10306 . nop
10307 . new_page:
10308 .
10309 The bctr is not predicted taken due to ctr not being
10310 ready, so prefetch continues on past the bctr into the
10311 new page which might have stale instructions. If they
10312 fail to be flushed, then they will be executed after the
10313 bctr executes. Either of the following modifications
10314 prevent the bad prefetch from happening in the first
10315 place:
10316 .
10317 . lis 9,new_page@ha lis 9,new_page@ha
10318 . addi 9,9,new_page@l addi 9,9,new_page@l
10319 . mtctr 9 mtctr 9
10320 . bctr bctr
10321 . nop b somewhere_else
10322 . b somewhere_else nop
10323 . new_page: new_page:
10324 . */
10325 insn = bfd_get_32 (input_bfd, contents + offset);
10326 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
10327 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
10328 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
10329 || ((insn & (0x3f << 26)) == (19u << 26)
10330 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
10331 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
10332 continue;
10333
10334 patch_addr = (start_addr + input_section->size
10335 - relax_info->workaround_size);
10336 patch_addr = (patch_addr + 15) & -16;
10337 patch_off = patch_addr - start_addr;
10338 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
10339
10340 if (rel != NULL
10341 && rel->r_offset >= offset
10342 && rel->r_offset < offset + 4)
10343 {
10344 asection *sreloc;
10345
10346 /* If the insn we are patching had a reloc, adjust the
10347 reloc r_offset so that the reloc applies to the moved
10348 location. This matters for -r and --emit-relocs. */
10349 if (rel + 1 != relend)
10350 {
10351 Elf_Internal_Rela tmp = *rel;
10352
10353 /* Keep the relocs sorted by r_offset. */
10354 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
10355 relend[-1] = tmp;
10356 }
10357 relend[-1].r_offset += patch_off - offset;
10358
10359 /* Adjust REL16 addends too. */
10360 switch (ELF32_R_TYPE (relend[-1].r_info))
10361 {
10362 case R_PPC_REL16:
10363 case R_PPC_REL16_LO:
10364 case R_PPC_REL16_HI:
10365 case R_PPC_REL16_HA:
10366 relend[-1].r_addend += patch_off - offset;
10367 break;
10368 default:
10369 break;
10370 }
10371
10372 /* If we are building a PIE or shared library with
10373 non-PIC objects, perhaps we had a dynamic reloc too?
10374 If so, the dynamic reloc must move with the insn. */
10375 sreloc = elf_section_data (input_section)->sreloc;
10376 if (sreloc != NULL)
10377 {
10378 Elf32_External_Rela *slo, *shi, *srelend;
10379 bfd_vma soffset;
10380
10381 slo = (Elf32_External_Rela *) sreloc->contents;
10382 shi = srelend = slo + sreloc->reloc_count;
10383 soffset = (offset + input_section->output_section->vma
10384 + input_section->output_offset);
10385 while (slo < shi)
10386 {
10387 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
10388 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
10389 &outrel);
10390 if (outrel.r_offset < soffset)
10391 slo = srel + 1;
10392 else if (outrel.r_offset > soffset + 3)
10393 shi = srel;
10394 else
10395 {
10396 if (srel + 1 != srelend)
10397 {
10398 memmove (srel, srel + 1,
10399 (srelend - (srel + 1)) * sizeof (*srel));
10400 srel = srelend - 1;
10401 }
10402 outrel.r_offset += patch_off - offset;
10403 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
10404 (bfd_byte *) srel);
10405 break;
10406 }
10407 }
10408 }
10409 }
10410 else
10411 rel = NULL;
10412
10413 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
10414 && (insn & 2) == 0 /* relative */)
10415 {
10416 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
10417
10418 delta += offset - patch_off;
10419 if (bfd_link_relocatable (info) && rel != NULL)
10420 delta = 0;
10421 if (!bfd_link_relocatable (info) && rel != NULL)
10422 {
10423 enum elf_ppc_reloc_type r_type;
10424
10425 r_type = ELF32_R_TYPE (relend[-1].r_info);
10426 if (r_type == R_PPC_REL14_BRTAKEN)
10427 insn |= BRANCH_PREDICT_BIT;
10428 else if (r_type == R_PPC_REL14_BRNTAKEN)
10429 insn &= ~BRANCH_PREDICT_BIT;
10430 else
10431 BFD_ASSERT (r_type == R_PPC_REL14);
10432
10433 if ((r_type == R_PPC_REL14_BRTAKEN
10434 || r_type == R_PPC_REL14_BRNTAKEN)
10435 && delta + 0x8000 < 0x10000
10436 && (bfd_signed_vma) delta < 0)
10437 insn ^= BRANCH_PREDICT_BIT;
10438 }
10439 if (delta + 0x8000 < 0x10000)
10440 {
10441 bfd_put_32 (input_bfd,
10442 (insn & ~0xfffc) | (delta & 0xfffc),
10443 contents + patch_off);
10444 patch_off += 4;
10445 bfd_put_32 (input_bfd,
10446 B | ((offset + 4 - patch_off) & 0x3fffffc),
10447 contents + patch_off);
10448 patch_off += 4;
10449 }
10450 else
10451 {
10452 if (rel != NULL)
10453 {
10454 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10455
10456 relend[-1].r_offset += 8;
10457 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10458 }
10459 bfd_put_32 (input_bfd,
10460 (insn & ~0xfffc) | 8,
10461 contents + patch_off);
10462 patch_off += 4;
10463 bfd_put_32 (input_bfd,
10464 B | ((offset + 4 - patch_off) & 0x3fffffc),
10465 contents + patch_off);
10466 patch_off += 4;
10467 bfd_put_32 (input_bfd,
10468 B | ((delta - 8) & 0x3fffffc),
10469 contents + patch_off);
10470 patch_off += 4;
10471 }
10472 }
10473 else
10474 {
10475 bfd_put_32 (input_bfd, insn, contents + patch_off);
10476 patch_off += 4;
10477 bfd_put_32 (input_bfd,
10478 B | ((offset + 4 - patch_off) & 0x3fffffc),
10479 contents + patch_off);
10480 patch_off += 4;
10481 }
10482 BFD_ASSERT (patch_off <= input_section->size);
10483 relax_info->workaround_size = input_section->size - patch_off;
10484 }
10485 }
10486
10487 return ret;
10488 }
10489 \f
10490 /* Write out the PLT relocs and entries for H. */
10491
10492 static bfd_boolean
10493 write_global_sym_plt (struct elf_link_hash_entry *h, void *inf)
10494 {
10495 struct bfd_link_info *info = (struct bfd_link_info *) inf;
10496 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10497 struct plt_entry *ent;
10498 bfd_boolean doneone;
10499
10500 doneone = FALSE;
10501 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10502 if (ent->plt.offset != (bfd_vma) -1)
10503 {
10504 if (!doneone)
10505 {
10506 Elf_Internal_Rela rela;
10507 bfd_byte *loc;
10508 bfd_vma reloc_index;
10509 asection *plt = htab->elf.splt;
10510 asection *relplt = htab->elf.srelplt;
10511
10512 if (htab->plt_type == PLT_NEW
10513 || !htab->elf.dynamic_sections_created
10514 || h->dynindx == -1)
10515 reloc_index = ent->plt.offset / 4;
10516 else
10517 {
10518 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10519 / htab->plt_slot_size);
10520 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10521 && htab->plt_type == PLT_OLD)
10522 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10523 }
10524
10525 /* This symbol has an entry in the procedure linkage table.
10526 Set it up. */
10527 if (htab->plt_type == PLT_VXWORKS
10528 && htab->elf.dynamic_sections_created
10529 && h->dynindx != -1)
10530 {
10531 bfd_vma got_offset;
10532 const bfd_vma *plt_entry;
10533
10534 /* The first three entries in .got.plt are reserved. */
10535 got_offset = (reloc_index + 3) * 4;
10536
10537 /* Use the right PLT. */
10538 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10539 : ppc_elf_vxworks_plt_entry;
10540
10541 /* Fill in the .plt on VxWorks. */
10542 if (bfd_link_pic (info))
10543 {
10544 bfd_put_32 (info->output_bfd,
10545 plt_entry[0] | PPC_HA (got_offset),
10546 plt->contents + ent->plt.offset + 0);
10547 bfd_put_32 (info->output_bfd,
10548 plt_entry[1] | PPC_LO (got_offset),
10549 plt->contents + ent->plt.offset + 4);
10550 }
10551 else
10552 {
10553 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10554
10555 bfd_put_32 (info->output_bfd,
10556 plt_entry[0] | PPC_HA (got_loc),
10557 plt->contents + ent->plt.offset + 0);
10558 bfd_put_32 (info->output_bfd,
10559 plt_entry[1] | PPC_LO (got_loc),
10560 plt->contents + ent->plt.offset + 4);
10561 }
10562
10563 bfd_put_32 (info->output_bfd, plt_entry[2],
10564 plt->contents + ent->plt.offset + 8);
10565 bfd_put_32 (info->output_bfd, plt_entry[3],
10566 plt->contents + ent->plt.offset + 12);
10567
10568 /* This instruction is an immediate load. The value loaded is
10569 the byte offset of the R_PPC_JMP_SLOT relocation from the
10570 start of the .rela.plt section. The value is stored in the
10571 low-order 16 bits of the load instruction. */
10572 /* NOTE: It appears that this is now an index rather than a
10573 prescaled offset. */
10574 bfd_put_32 (info->output_bfd,
10575 plt_entry[4] | reloc_index,
10576 plt->contents + ent->plt.offset + 16);
10577 /* This instruction is a PC-relative branch whose target is
10578 the start of the PLT section. The address of this branch
10579 instruction is 20 bytes beyond the start of this PLT entry.
10580 The address is encoded in bits 6-29, inclusive. The value
10581 stored is right-shifted by two bits, permitting a 26-bit
10582 offset. */
10583 bfd_put_32 (info->output_bfd,
10584 (plt_entry[5]
10585 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10586 plt->contents + ent->plt.offset + 20);
10587 bfd_put_32 (info->output_bfd, plt_entry[6],
10588 plt->contents + ent->plt.offset + 24);
10589 bfd_put_32 (info->output_bfd, plt_entry[7],
10590 plt->contents + ent->plt.offset + 28);
10591
10592 /* Fill in the GOT entry corresponding to this PLT slot with
10593 the address immediately after the "bctr" instruction
10594 in this PLT entry. */
10595 bfd_put_32 (info->output_bfd, (plt->output_section->vma
10596 + plt->output_offset
10597 + ent->plt.offset + 16),
10598 htab->elf.sgotplt->contents + got_offset);
10599
10600 if (!bfd_link_pic (info))
10601 {
10602 /* Fill in a couple of entries in .rela.plt.unloaded. */
10603 loc = htab->srelplt2->contents
10604 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10605 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10606 * sizeof (Elf32_External_Rela));
10607
10608 /* Provide the @ha relocation for the first instruction. */
10609 rela.r_offset = (plt->output_section->vma
10610 + plt->output_offset
10611 + ent->plt.offset + 2);
10612 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10613 R_PPC_ADDR16_HA);
10614 rela.r_addend = got_offset;
10615 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10616 loc += sizeof (Elf32_External_Rela);
10617
10618 /* Provide the @l relocation for the second instruction. */
10619 rela.r_offset = (plt->output_section->vma
10620 + plt->output_offset
10621 + ent->plt.offset + 6);
10622 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10623 R_PPC_ADDR16_LO);
10624 rela.r_addend = got_offset;
10625 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10626 loc += sizeof (Elf32_External_Rela);
10627
10628 /* Provide a relocation for the GOT entry corresponding to this
10629 PLT slot. Point it at the middle of the .plt entry. */
10630 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10631 + htab->elf.sgotplt->output_offset
10632 + got_offset);
10633 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10634 R_PPC_ADDR32);
10635 rela.r_addend = ent->plt.offset + 16;
10636 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10637 }
10638
10639 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10640 In particular, the offset for the relocation is not the
10641 address of the PLT entry for this function, as specified
10642 by the ABI. Instead, the offset is set to the address of
10643 the GOT slot for this function. See EABI 4.4.4.1. */
10644 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10645 + htab->elf.sgotplt->output_offset
10646 + got_offset);
10647 rela.r_addend = 0;
10648 }
10649 else
10650 {
10651 rela.r_addend = 0;
10652 if (!htab->elf.dynamic_sections_created
10653 || h->dynindx == -1)
10654 {
10655 if (h->type == STT_GNU_IFUNC)
10656 {
10657 plt = htab->elf.iplt;
10658 relplt = htab->elf.irelplt;
10659 }
10660 else
10661 {
10662 plt = htab->pltlocal;
10663 relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL;
10664 }
10665 if (h->def_regular
10666 && (h->root.type == bfd_link_hash_defined
10667 || h->root.type == bfd_link_hash_defweak))
10668 rela.r_addend = SYM_VAL (h);
10669 }
10670
10671 if (relplt == NULL)
10672 {
10673 loc = plt->contents + ent->plt.offset;
10674 bfd_put_32 (info->output_bfd, rela.r_addend, loc);
10675 }
10676 else
10677 {
10678 rela.r_offset = (plt->output_section->vma
10679 + plt->output_offset
10680 + ent->plt.offset);
10681
10682 if (htab->plt_type == PLT_OLD
10683 || !htab->elf.dynamic_sections_created
10684 || h->dynindx == -1)
10685 {
10686 /* We don't need to fill in the .plt. The ppc dynamic
10687 linker will fill it in. */
10688 }
10689 else
10690 {
10691 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10692 + htab->glink->output_section->vma
10693 + htab->glink->output_offset);
10694 bfd_put_32 (info->output_bfd, val,
10695 plt->contents + ent->plt.offset);
10696 }
10697 }
10698 }
10699
10700 if (relplt != NULL)
10701 {
10702 /* Fill in the entry in the .rela.plt section. */
10703 if (!htab->elf.dynamic_sections_created
10704 || h->dynindx == -1)
10705 {
10706 if (h->type == STT_GNU_IFUNC)
10707 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10708 else
10709 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
10710 loc = relplt->contents + (relplt->reloc_count++
10711 * sizeof (Elf32_External_Rela));
10712 htab->local_ifunc_resolver = 1;
10713 }
10714 else
10715 {
10716 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10717 loc = relplt->contents + (reloc_index
10718 * sizeof (Elf32_External_Rela));
10719 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10720 htab->maybe_local_ifunc_resolver = 1;
10721 }
10722 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10723 }
10724 doneone = TRUE;
10725 }
10726
10727 if (htab->plt_type == PLT_NEW
10728 || !htab->elf.dynamic_sections_created
10729 || h->dynindx == -1)
10730 {
10731 unsigned char *p;
10732 asection *plt = htab->elf.splt;
10733
10734 if (!htab->elf.dynamic_sections_created
10735 || h->dynindx == -1)
10736 {
10737 if (h->type == STT_GNU_IFUNC)
10738 plt = htab->elf.iplt;
10739 else
10740 break;
10741 }
10742
10743 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10744 write_glink_stub (h, ent, plt, p, info);
10745
10746 if (!bfd_link_pic (info))
10747 /* We only need one non-PIC glink stub. */
10748 break;
10749 }
10750 else
10751 break;
10752 }
10753 return TRUE;
10754 }
10755
10756 /* Finish up PLT handling. */
10757
10758 bfd_boolean
10759 ppc_finish_symbols (struct bfd_link_info *info)
10760 {
10761 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10762 bfd *ibfd;
10763
10764 if (!htab)
10765 return TRUE;
10766
10767 elf_link_hash_traverse (&htab->elf, write_global_sym_plt, info);
10768
10769 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10770 {
10771 bfd_vma *local_got, *end_local_got;
10772 struct plt_entry **local_plt, **lplt, **end_local_plt;
10773 Elf_Internal_Shdr *symtab_hdr;
10774 bfd_size_type locsymcount;
10775 Elf_Internal_Sym *local_syms = NULL;
10776 struct plt_entry *ent;
10777
10778 if (!is_ppc_elf (ibfd))
10779 continue;
10780
10781 local_got = elf_local_got_offsets (ibfd);
10782 if (!local_got)
10783 continue;
10784
10785 symtab_hdr = &elf_symtab_hdr (ibfd);
10786 locsymcount = symtab_hdr->sh_info;
10787 end_local_got = local_got + locsymcount;
10788 local_plt = (struct plt_entry **) end_local_got;
10789 end_local_plt = local_plt + locsymcount;
10790 for (lplt = local_plt; lplt < end_local_plt; ++lplt)
10791 for (ent = *lplt; ent != NULL; ent = ent->next)
10792 {
10793 if (ent->plt.offset != (bfd_vma) -1)
10794 {
10795 Elf_Internal_Sym *sym;
10796 asection *sym_sec;
10797 asection *plt, *relplt;
10798 bfd_byte *loc;
10799 bfd_vma val;
10800 Elf_Internal_Rela rela;
10801
10802 if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms,
10803 lplt - local_plt, ibfd))
10804 {
10805 if (local_syms != NULL
10806 && symtab_hdr->contents != (unsigned char *) local_syms)
10807 free (local_syms);
10808 return FALSE;
10809 }
10810
10811 val = sym->st_value;
10812 if (sym_sec != NULL && sym_sec->output_section != NULL)
10813 val += sym_sec->output_offset + sym_sec->output_section->vma;
10814
10815 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
10816 {
10817 htab->local_ifunc_resolver = 1;
10818 plt = htab->elf.iplt;
10819 relplt = htab->elf.irelplt;
10820 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10821 }
10822 else
10823 {
10824 plt = htab->pltlocal;
10825 if (bfd_link_pic (info))
10826 {
10827 relplt = htab->relpltlocal;
10828 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
10829 }
10830 else
10831 {
10832 loc = plt->contents + ent->plt.offset;
10833 bfd_put_32 (info->output_bfd, val, loc);
10834 continue;
10835 }
10836 }
10837
10838 rela.r_offset = (ent->plt.offset
10839 + plt->output_offset
10840 + plt->output_section->vma);
10841 rela.r_addend = val;
10842 loc = relplt->contents + (relplt->reloc_count++
10843 * sizeof (Elf32_External_Rela));
10844 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10845 }
10846 if ((ent->glink_offset & 1) == 0)
10847 {
10848 unsigned char *p = ((unsigned char *) htab->glink->contents
10849 + ent->glink_offset);
10850
10851 write_glink_stub (NULL, ent, htab->elf.iplt, p, info);
10852 ent->glink_offset |= 1;
10853 }
10854 }
10855
10856 if (local_syms != NULL
10857 && symtab_hdr->contents != (unsigned char *) local_syms)
10858 {
10859 if (!info->keep_memory)
10860 free (local_syms);
10861 else
10862 symtab_hdr->contents = (unsigned char *) local_syms;
10863 }
10864 }
10865 return TRUE;
10866 }
10867
10868 /* Finish up dynamic symbol handling. We set the contents of various
10869 dynamic sections here. */
10870
10871 static bfd_boolean
10872 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10873 struct bfd_link_info *info,
10874 struct elf_link_hash_entry *h,
10875 Elf_Internal_Sym *sym)
10876 {
10877 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10878 struct plt_entry *ent;
10879
10880 #ifdef DEBUG
10881 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10882 h->root.root.string);
10883 #endif
10884
10885 if (!h->def_regular
10886 || (h->type == STT_GNU_IFUNC && !bfd_link_pic (info)))
10887 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10888 if (ent->plt.offset != (bfd_vma) -1)
10889 {
10890 if (!h->def_regular)
10891 {
10892 /* Mark the symbol as undefined, rather than as
10893 defined in the .plt section. Leave the value if
10894 there were any relocations where pointer equality
10895 matters (this is a clue for the dynamic linker, to
10896 make function pointer comparisons work between an
10897 application and shared library), otherwise set it
10898 to zero. */
10899 sym->st_shndx = SHN_UNDEF;
10900 if (!h->pointer_equality_needed)
10901 sym->st_value = 0;
10902 else if (!h->ref_regular_nonweak)
10903 {
10904 /* This breaks function pointer comparisons, but
10905 that is better than breaking tests for a NULL
10906 function pointer. */
10907 sym->st_value = 0;
10908 }
10909 }
10910 else
10911 {
10912 /* Set the value of ifunc symbols in a non-pie
10913 executable to the glink entry. This is to avoid
10914 text relocations. We can't do this for ifunc in
10915 allocate_dynrelocs, as we do for normal dynamic
10916 function symbols with plt entries, because we need
10917 to keep the original value around for the ifunc
10918 relocation. */
10919 sym->st_shndx
10920 = (_bfd_elf_section_from_bfd_section
10921 (info->output_bfd, htab->glink->output_section));
10922 sym->st_value = (ent->glink_offset
10923 + htab->glink->output_offset
10924 + htab->glink->output_section->vma);
10925 }
10926 break;
10927 }
10928
10929 if (h->needs_copy)
10930 {
10931 asection *s;
10932 Elf_Internal_Rela rela;
10933 bfd_byte *loc;
10934
10935 /* This symbols needs a copy reloc. Set it up. */
10936
10937 #ifdef DEBUG
10938 fprintf (stderr, ", copy");
10939 #endif
10940
10941 BFD_ASSERT (h->dynindx != -1);
10942
10943 if (ppc_elf_hash_entry (h)->has_sda_refs)
10944 s = htab->relsbss;
10945 else if (h->root.u.def.section == htab->elf.sdynrelro)
10946 s = htab->elf.sreldynrelro;
10947 else
10948 s = htab->elf.srelbss;
10949 BFD_ASSERT (s != NULL);
10950
10951 rela.r_offset = SYM_VAL (h);
10952 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10953 rela.r_addend = 0;
10954 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10955 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10956 }
10957
10958 #ifdef DEBUG
10959 fprintf (stderr, "\n");
10960 #endif
10961
10962 return TRUE;
10963 }
10964 \f
10965 static enum elf_reloc_type_class
10966 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10967 const asection *rel_sec,
10968 const Elf_Internal_Rela *rela)
10969 {
10970 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10971
10972 if (rel_sec == htab->elf.irelplt)
10973 return reloc_class_ifunc;
10974
10975 switch (ELF32_R_TYPE (rela->r_info))
10976 {
10977 case R_PPC_RELATIVE:
10978 return reloc_class_relative;
10979 case R_PPC_JMP_SLOT:
10980 return reloc_class_plt;
10981 case R_PPC_COPY:
10982 return reloc_class_copy;
10983 default:
10984 return reloc_class_normal;
10985 }
10986 }
10987 \f
10988 /* Finish up the dynamic sections. */
10989
10990 static bfd_boolean
10991 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10992 struct bfd_link_info *info)
10993 {
10994 asection *sdyn;
10995 struct ppc_elf_link_hash_table *htab;
10996 bfd_vma got;
10997 bfd *dynobj;
10998 bfd_boolean ret = TRUE;
10999
11000 #ifdef DEBUG
11001 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
11002 #endif
11003
11004 htab = ppc_elf_hash_table (info);
11005 dynobj = htab->elf.dynobj;
11006 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
11007
11008 got = 0;
11009 if (htab->elf.hgot != NULL)
11010 got = SYM_VAL (htab->elf.hgot);
11011
11012 if (htab->elf.dynamic_sections_created)
11013 {
11014 Elf32_External_Dyn *dyncon, *dynconend;
11015
11016 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
11017
11018 dyncon = (Elf32_External_Dyn *) sdyn->contents;
11019 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
11020 for (; dyncon < dynconend; dyncon++)
11021 {
11022 Elf_Internal_Dyn dyn;
11023 asection *s;
11024
11025 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
11026
11027 switch (dyn.d_tag)
11028 {
11029 case DT_PLTGOT:
11030 if (htab->is_vxworks)
11031 s = htab->elf.sgotplt;
11032 else
11033 s = htab->elf.splt;
11034 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11035 break;
11036
11037 case DT_PLTRELSZ:
11038 dyn.d_un.d_val = htab->elf.srelplt->size;
11039 break;
11040
11041 case DT_JMPREL:
11042 s = htab->elf.srelplt;
11043 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11044 break;
11045
11046 case DT_PPC_GOT:
11047 dyn.d_un.d_ptr = got;
11048 break;
11049
11050 case DT_TEXTREL:
11051 if (htab->local_ifunc_resolver)
11052 info->callbacks->einfo
11053 (_("%X%P: text relocations and GNU indirect "
11054 "functions will result in a segfault at runtime\n"));
11055 else if (htab->maybe_local_ifunc_resolver)
11056 info->callbacks->einfo
11057 (_("%P: warning: text relocations and GNU indirect "
11058 "functions may result in a segfault at runtime\n"));
11059 continue;
11060
11061 default:
11062 if (htab->is_vxworks
11063 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
11064 break;
11065 continue;
11066 }
11067
11068 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
11069 }
11070 }
11071
11072 if (htab->elf.sgot != NULL
11073 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
11074 {
11075 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
11076 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
11077 {
11078 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
11079
11080 p += htab->elf.hgot->root.u.def.value;
11081 if (htab->plt_type == PLT_OLD)
11082 {
11083 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
11084 so that a function can easily find the address of
11085 _GLOBAL_OFFSET_TABLE_. */
11086 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
11087 < htab->elf.hgot->root.u.def.section->size);
11088 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
11089 }
11090
11091 if (sdyn != NULL)
11092 {
11093 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
11094 BFD_ASSERT (htab->elf.hgot->root.u.def.value
11095 < htab->elf.hgot->root.u.def.section->size);
11096 bfd_put_32 (output_bfd, val, p);
11097 }
11098 }
11099 else
11100 {
11101 /* xgettext:c-format */
11102 _bfd_error_handler (_("%s not defined in linker created %pA"),
11103 htab->elf.hgot->root.root.string,
11104 (htab->elf.sgotplt != NULL
11105 ? htab->elf.sgotplt : htab->elf.sgot));
11106 bfd_set_error (bfd_error_bad_value);
11107 ret = FALSE;
11108 }
11109
11110 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
11111 }
11112
11113 /* Fill in the first entry in the VxWorks procedure linkage table. */
11114 if (htab->is_vxworks
11115 && htab->elf.splt != NULL
11116 && htab->elf.splt->size != 0
11117 && htab->elf.splt->output_section != bfd_abs_section_ptr)
11118 {
11119 asection *splt = htab->elf.splt;
11120 /* Use the right PLT. */
11121 const bfd_vma *plt_entry = (bfd_link_pic (info)
11122 ? ppc_elf_vxworks_pic_plt0_entry
11123 : ppc_elf_vxworks_plt0_entry);
11124
11125 if (!bfd_link_pic (info))
11126 {
11127 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
11128
11129 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
11130 splt->contents + 0);
11131 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
11132 splt->contents + 4);
11133 }
11134 else
11135 {
11136 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
11137 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
11138 }
11139 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
11140 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
11141 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
11142 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
11143 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
11144 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
11145
11146 if (! bfd_link_pic (info))
11147 {
11148 Elf_Internal_Rela rela;
11149 bfd_byte *loc;
11150
11151 loc = htab->srelplt2->contents;
11152
11153 /* Output the @ha relocation for the first instruction. */
11154 rela.r_offset = (htab->elf.splt->output_section->vma
11155 + htab->elf.splt->output_offset
11156 + 2);
11157 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
11158 rela.r_addend = 0;
11159 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11160 loc += sizeof (Elf32_External_Rela);
11161
11162 /* Output the @l relocation for the second instruction. */
11163 rela.r_offset = (htab->elf.splt->output_section->vma
11164 + htab->elf.splt->output_offset
11165 + 6);
11166 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
11167 rela.r_addend = 0;
11168 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11169 loc += sizeof (Elf32_External_Rela);
11170
11171 /* Fix up the remaining relocations. They may have the wrong
11172 symbol index for _G_O_T_ or _P_L_T_ depending on the order
11173 in which symbols were output. */
11174 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
11175 {
11176 Elf_Internal_Rela rel;
11177
11178 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11179 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
11180 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11181 loc += sizeof (Elf32_External_Rela);
11182
11183 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11184 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
11185 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11186 loc += sizeof (Elf32_External_Rela);
11187
11188 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11189 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
11190 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11191 loc += sizeof (Elf32_External_Rela);
11192 }
11193 }
11194 }
11195
11196 if (htab->glink != NULL
11197 && htab->glink->contents != NULL
11198 && htab->elf.dynamic_sections_created)
11199 {
11200 unsigned char *p;
11201 unsigned char *endp;
11202 bfd_vma res0;
11203
11204 /*
11205 * PIC glink code is the following:
11206 *
11207 * # ith PLT code stub.
11208 * addis 11,30,(plt+(i-1)*4-got)@ha
11209 * lwz 11,(plt+(i-1)*4-got)@l(11)
11210 * mtctr 11
11211 * bctr
11212 *
11213 * # A table of branches, one for each plt entry.
11214 * # The idea is that the plt call stub loads ctr and r11 with these
11215 * # addresses, so (r11 - res_0) gives the plt index * 4.
11216 * res_0: b PLTresolve
11217 * res_1: b PLTresolve
11218 * .
11219 * # Some number of entries towards the end can be nops
11220 * res_n_m3: nop
11221 * res_n_m2: nop
11222 * res_n_m1:
11223 *
11224 * PLTresolve:
11225 * addis 11,11,(1f-res_0)@ha
11226 * mflr 0
11227 * bcl 20,31,1f
11228 * 1: addi 11,11,(1b-res_0)@l
11229 * mflr 12
11230 * mtlr 0
11231 * sub 11,11,12 # r11 = index * 4
11232 * addis 12,12,(got+4-1b)@ha
11233 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
11234 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
11235 * mtctr 0
11236 * add 0,11,11
11237 * add 11,0,11 # r11 = index * 12 = reloc offset.
11238 * bctr
11239 *
11240 * Non-PIC glink code is a little simpler.
11241 *
11242 * # ith PLT code stub.
11243 * lis 11,(plt+(i-1)*4)@ha
11244 * lwz 11,(plt+(i-1)*4)@l(11)
11245 * mtctr 11
11246 * bctr
11247 *
11248 * The branch table is the same, then comes
11249 *
11250 * PLTresolve:
11251 * lis 12,(got+4)@ha
11252 * addis 11,11,(-res_0)@ha
11253 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
11254 * addi 11,11,(-res_0)@l # r11 = index * 4
11255 * mtctr 0
11256 * add 0,11,11
11257 * lwz 12,(got+8)@l(12) # got[2] contains the map address
11258 * add 11,0,11 # r11 = index * 12 = reloc offset.
11259 * bctr
11260 */
11261
11262 /* Build the branch table, one for each plt entry (less one),
11263 and perhaps some padding. */
11264 p = htab->glink->contents;
11265 p += htab->glink_pltresolve;
11266 endp = htab->glink->contents;
11267 endp += htab->glink->size - GLINK_PLTRESOLVE;
11268 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
11269 {
11270 bfd_put_32 (output_bfd, B + endp - p, p);
11271 p += 4;
11272 }
11273 while (p < endp)
11274 {
11275 bfd_put_32 (output_bfd, NOP, p);
11276 p += 4;
11277 }
11278
11279 res0 = (htab->glink_pltresolve
11280 + htab->glink->output_section->vma
11281 + htab->glink->output_offset);
11282
11283 if (htab->params->ppc476_workaround)
11284 {
11285 /* Ensure that a call stub at the end of a page doesn't
11286 result in prefetch over the end of the page into the
11287 glink branch table. */
11288 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
11289 bfd_vma page_addr;
11290 bfd_vma glink_start = (htab->glink->output_section->vma
11291 + htab->glink->output_offset);
11292
11293 for (page_addr = res0 & -pagesize;
11294 page_addr > glink_start;
11295 page_addr -= pagesize)
11296 {
11297 /* We have a plt call stub that may need fixing. */
11298 bfd_byte *loc;
11299 unsigned int insn;
11300
11301 loc = htab->glink->contents + page_addr - 4 - glink_start;
11302 insn = bfd_get_32 (output_bfd, loc);
11303 if (insn == BCTR)
11304 {
11305 /* By alignment, we know that there must be at least
11306 one other call stub before this one. */
11307 insn = bfd_get_32 (output_bfd, loc - 16);
11308 if (insn == BCTR)
11309 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
11310 else
11311 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
11312 }
11313 }
11314 }
11315
11316 /* Last comes the PLTresolve stub. */
11317 endp = p + GLINK_PLTRESOLVE;
11318 if (bfd_link_pic (info))
11319 {
11320 bfd_vma bcl;
11321
11322 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
11323 + htab->glink->output_section->vma
11324 + htab->glink->output_offset);
11325
11326 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (bcl - res0), p);
11327 p += 4;
11328 bfd_put_32 (output_bfd, MFLR_0, p);
11329 p += 4;
11330 bfd_put_32 (output_bfd, BCL_20_31, p);
11331 p += 4;
11332 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (bcl - res0), p);
11333 p += 4;
11334 bfd_put_32 (output_bfd, MFLR_12, p);
11335 p += 4;
11336 bfd_put_32 (output_bfd, MTLR_0, p);
11337 p += 4;
11338 bfd_put_32 (output_bfd, SUB_11_11_12, p);
11339 p += 4;
11340 bfd_put_32 (output_bfd, ADDIS_12_12 + PPC_HA (got + 4 - bcl), p);
11341 p += 4;
11342 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
11343 {
11344 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4 - bcl), p);
11345 p += 4;
11346 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8 - bcl), p);
11347 p += 4;
11348 }
11349 else
11350 {
11351 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4 - bcl), p);
11352 p += 4;
11353 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
11354 p += 4;
11355 }
11356 bfd_put_32 (output_bfd, MTCTR_0, p);
11357 p += 4;
11358 bfd_put_32 (output_bfd, ADD_0_11_11, p);
11359 }
11360 else
11361 {
11362 bfd_put_32 (output_bfd, LIS_12 + PPC_HA (got + 4), p);
11363 p += 4;
11364 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (-res0), p);
11365 p += 4;
11366 if (PPC_HA (got + 4) == PPC_HA (got + 8))
11367 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4), p);
11368 else
11369 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4), p);
11370 p += 4;
11371 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (-res0), p);
11372 p += 4;
11373 bfd_put_32 (output_bfd, MTCTR_0, p);
11374 p += 4;
11375 bfd_put_32 (output_bfd, ADD_0_11_11, p);
11376 p += 4;
11377 if (PPC_HA (got + 4) == PPC_HA (got + 8))
11378 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8), p);
11379 else
11380 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
11381 }
11382 p += 4;
11383 bfd_put_32 (output_bfd, ADD_11_0_11, p);
11384 p += 4;
11385 bfd_put_32 (output_bfd, BCTR, p);
11386 p += 4;
11387 while (p < endp)
11388 {
11389 bfd_put_32 (output_bfd,
11390 htab->params->ppc476_workaround ? BA : NOP, p);
11391 p += 4;
11392 }
11393 BFD_ASSERT (p == endp);
11394 }
11395
11396 if (htab->glink_eh_frame != NULL
11397 && htab->glink_eh_frame->contents != NULL)
11398 {
11399 unsigned char *p = htab->glink_eh_frame->contents;
11400 bfd_vma val;
11401
11402 p += sizeof (glink_eh_frame_cie);
11403 /* FDE length. */
11404 p += 4;
11405 /* CIE pointer. */
11406 p += 4;
11407 /* Offset to .glink. */
11408 val = (htab->glink->output_section->vma
11409 + htab->glink->output_offset);
11410 val -= (htab->glink_eh_frame->output_section->vma
11411 + htab->glink_eh_frame->output_offset);
11412 val -= p - htab->glink_eh_frame->contents;
11413 bfd_put_32 (htab->elf.dynobj, val, p);
11414
11415 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
11416 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
11417 htab->glink_eh_frame,
11418 htab->glink_eh_frame->contents))
11419 return FALSE;
11420 }
11421
11422 return ret;
11423 }
11424 \f
11425 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
11426 #define TARGET_LITTLE_NAME "elf32-powerpcle"
11427 #define TARGET_BIG_SYM powerpc_elf32_vec
11428 #define TARGET_BIG_NAME "elf32-powerpc"
11429 #define ELF_ARCH bfd_arch_powerpc
11430 #define ELF_TARGET_ID PPC32_ELF_DATA
11431 #define ELF_MACHINE_CODE EM_PPC
11432 #define ELF_MAXPAGESIZE 0x10000
11433 #define ELF_COMMONPAGESIZE 0x1000
11434 #define ELF_RELROPAGESIZE ELF_MAXPAGESIZE
11435 #define elf_info_to_howto ppc_elf_info_to_howto
11436
11437 #ifdef EM_CYGNUS_POWERPC
11438 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
11439 #endif
11440
11441 #ifdef EM_PPC_OLD
11442 #define ELF_MACHINE_ALT2 EM_PPC_OLD
11443 #endif
11444
11445 #define elf_backend_plt_not_loaded 1
11446 #define elf_backend_want_dynrelro 1
11447 #define elf_backend_can_gc_sections 1
11448 #define elf_backend_can_refcount 1
11449 #define elf_backend_rela_normal 1
11450 #define elf_backend_caches_rawsize 1
11451
11452 #define bfd_elf32_mkobject ppc_elf_mkobject
11453 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
11454 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
11455 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
11456 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
11457 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
11458 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
11459 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
11460
11461 #define elf_backend_object_p ppc_elf_object_p
11462 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
11463 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
11464 #define elf_backend_relocate_section ppc_elf_relocate_section
11465 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
11466 #define elf_backend_check_relocs ppc_elf_check_relocs
11467 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
11468 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
11469 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
11470 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
11471 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
11472 #define elf_backend_hash_symbol ppc_elf_hash_symbol
11473 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
11474 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
11475 #define elf_backend_fake_sections ppc_elf_fake_sections
11476 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
11477 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
11478 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
11479 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
11480 #define elf_backend_write_core_note ppc_elf_write_core_note
11481 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
11482 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
11483 #define elf_backend_final_write_processing ppc_elf_final_write_processing
11484 #define elf_backend_write_section ppc_elf_write_section
11485 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
11486 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
11487 #define elf_backend_action_discarded ppc_elf_action_discarded
11488 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
11489 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
11490
11491 #include "elf32-target.h"
11492
11493 /* FreeBSD Target */
11494
11495 #undef TARGET_LITTLE_SYM
11496 #undef TARGET_LITTLE_NAME
11497
11498 #undef TARGET_BIG_SYM
11499 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
11500 #undef TARGET_BIG_NAME
11501 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
11502
11503 #undef ELF_OSABI
11504 #define ELF_OSABI ELFOSABI_FREEBSD
11505
11506 #undef elf32_bed
11507 #define elf32_bed elf32_powerpc_fbsd_bed
11508
11509 #include "elf32-target.h"
11510
11511 /* VxWorks Target */
11512
11513 #undef TARGET_LITTLE_SYM
11514 #undef TARGET_LITTLE_NAME
11515
11516 #undef TARGET_BIG_SYM
11517 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
11518 #undef TARGET_BIG_NAME
11519 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
11520
11521 #undef ELF_OSABI
11522
11523 /* VxWorks uses the elf default section flags for .plt. */
11524 static const struct bfd_elf_special_section *
11525 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
11526 {
11527 if (sec->name == NULL)
11528 return NULL;
11529
11530 if (strcmp (sec->name, ".plt") == 0)
11531 return _bfd_elf_get_sec_type_attr (abfd, sec);
11532
11533 return ppc_elf_get_sec_type_attr (abfd, sec);
11534 }
11535
11536 /* Like ppc_elf_link_hash_table_create, but overrides
11537 appropriately for VxWorks. */
11538 static struct bfd_link_hash_table *
11539 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11540 {
11541 struct bfd_link_hash_table *ret;
11542
11543 ret = ppc_elf_link_hash_table_create (abfd);
11544 if (ret)
11545 {
11546 struct ppc_elf_link_hash_table *htab
11547 = (struct ppc_elf_link_hash_table *)ret;
11548 htab->is_vxworks = 1;
11549 htab->plt_type = PLT_VXWORKS;
11550 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11551 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11552 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11553 }
11554 return ret;
11555 }
11556
11557 /* Tweak magic VxWorks symbols as they are loaded. */
11558 static bfd_boolean
11559 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11560 struct bfd_link_info *info,
11561 Elf_Internal_Sym *sym,
11562 const char **namep,
11563 flagword *flagsp,
11564 asection **secp,
11565 bfd_vma *valp)
11566 {
11567 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
11568 valp))
11569 return FALSE;
11570
11571 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
11572 }
11573
11574 static void
11575 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11576 {
11577 ppc_elf_final_write_processing (abfd, linker);
11578 elf_vxworks_final_write_processing (abfd, linker);
11579 }
11580
11581 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11582 define it. */
11583 #undef elf_backend_want_plt_sym
11584 #define elf_backend_want_plt_sym 1
11585 #undef elf_backend_want_got_plt
11586 #define elf_backend_want_got_plt 1
11587 #undef elf_backend_got_symbol_offset
11588 #define elf_backend_got_symbol_offset 0
11589 #undef elf_backend_plt_not_loaded
11590 #define elf_backend_plt_not_loaded 0
11591 #undef elf_backend_plt_readonly
11592 #define elf_backend_plt_readonly 1
11593 #undef elf_backend_got_header_size
11594 #define elf_backend_got_header_size 12
11595 #undef elf_backend_dtrel_excludes_plt
11596 #define elf_backend_dtrel_excludes_plt 1
11597
11598 #undef bfd_elf32_get_synthetic_symtab
11599
11600 #undef bfd_elf32_bfd_link_hash_table_create
11601 #define bfd_elf32_bfd_link_hash_table_create \
11602 ppc_elf_vxworks_link_hash_table_create
11603 #undef elf_backend_add_symbol_hook
11604 #define elf_backend_add_symbol_hook \
11605 ppc_elf_vxworks_add_symbol_hook
11606 #undef elf_backend_link_output_symbol_hook
11607 #define elf_backend_link_output_symbol_hook \
11608 elf_vxworks_link_output_symbol_hook
11609 #undef elf_backend_final_write_processing
11610 #define elf_backend_final_write_processing \
11611 ppc_elf_vxworks_final_write_processing
11612 #undef elf_backend_get_sec_type_attr
11613 #define elf_backend_get_sec_type_attr \
11614 ppc_elf_vxworks_get_sec_type_attr
11615 #undef elf_backend_emit_relocs
11616 #define elf_backend_emit_relocs \
11617 elf_vxworks_emit_relocs
11618
11619 #undef elf32_bed
11620 #define elf32_bed ppc_elf_vxworks_bed
11621 #undef elf_backend_post_process_headers
11622
11623 #include "elf32-target.h"
GDB Binutils - Deliverables
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