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ppc apuinfo for spe parsed incorrectly
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2016 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
39 typedef enum split16_format_type
40 {
41 split16a_type = 0,
42 split16d_type
43 }
44 split16_format_type;
45
46 /* RELA relocations are used here. */
47
48 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc_elf_unhandled_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52
53 /* Branch prediction bit for branch taken relocs. */
54 #define BRANCH_PREDICT_BIT 0x200000
55 /* Mask to set RA in memory instructions. */
56 #define RA_REGISTER_MASK 0x001f0000
57 /* Value to shift register by to insert RA. */
58 #define RA_REGISTER_SHIFT 16
59
60 /* The name of the dynamic interpreter. This is put in the .interp
61 section. */
62 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
63
64 /* For old-style PLT. */
65 /* The number of single-slot PLT entries (the rest use two slots). */
66 #define PLT_NUM_SINGLE_ENTRIES 8192
67
68 /* For new-style .glink and .plt. */
69 #define GLINK_PLTRESOLVE 16*4
70 #define GLINK_ENTRY_SIZE 4*4
71 #define TLS_GET_ADDR_GLINK_SIZE 12*4
72
73 /* VxWorks uses its own plt layout, filled in by the static linker. */
74
75 /* The standard VxWorks PLT entry. */
76 #define VXWORKS_PLT_ENTRY_SIZE 32
77 static const bfd_vma ppc_elf_vxworks_plt_entry
78 [VXWORKS_PLT_ENTRY_SIZE / 4] =
79 {
80 0x3d800000, /* lis r12,0 */
81 0x818c0000, /* lwz r12,0(r12) */
82 0x7d8903a6, /* mtctr r12 */
83 0x4e800420, /* bctr */
84 0x39600000, /* li r11,0 */
85 0x48000000, /* b 14 <.PLT0resolve+0x4> */
86 0x60000000, /* nop */
87 0x60000000, /* nop */
88 };
89 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
90 [VXWORKS_PLT_ENTRY_SIZE / 4] =
91 {
92 0x3d9e0000, /* addis r12,r30,0 */
93 0x818c0000, /* lwz r12,0(r12) */
94 0x7d8903a6, /* mtctr r12 */
95 0x4e800420, /* bctr */
96 0x39600000, /* li r11,0 */
97 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
98 0x60000000, /* nop */
99 0x60000000, /* nop */
100 };
101
102 /* The initial VxWorks PLT entry. */
103 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
104 static const bfd_vma ppc_elf_vxworks_plt0_entry
105 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
106 {
107 0x3d800000, /* lis r12,0 */
108 0x398c0000, /* addi r12,r12,0 */
109 0x800c0008, /* lwz r0,8(r12) */
110 0x7c0903a6, /* mtctr r0 */
111 0x818c0004, /* lwz r12,4(r12) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 };
116 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
117 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
118 {
119 0x819e0008, /* lwz r12,8(r30) */
120 0x7d8903a6, /* mtctr r12 */
121 0x819e0004, /* lwz r12,4(r30) */
122 0x4e800420, /* bctr */
123 0x60000000, /* nop */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 };
128
129 /* For executables, we have some additional relocations in
130 .rela.plt.unloaded, for the kernel loader. */
131
132 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
133 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
134 /* The number of relocations in the PLTResolve slot. */
135 #define VXWORKS_PLTRESOLVE_RELOCS 2
136 /* The number of relocations in the PLTResolve slot when when creating
137 a shared library. */
138 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
139
140 /* Some instructions. */
141 #define ADDIS_11_11 0x3d6b0000
142 #define ADDIS_11_30 0x3d7e0000
143 #define ADDIS_12_12 0x3d8c0000
144 #define ADDI_11_11 0x396b0000
145 #define ADD_0_11_11 0x7c0b5a14
146 #define ADD_3_12_2 0x7c6c1214
147 #define ADD_11_0_11 0x7d605a14
148 #define B 0x48000000
149 #define BA 0x48000002
150 #define BCL_20_31 0x429f0005
151 #define BCTR 0x4e800420
152 #define BEQLR 0x4d820020
153 #define CMPWI_11_0 0x2c0b0000
154 #define LIS_11 0x3d600000
155 #define LIS_12 0x3d800000
156 #define LWZU_0_12 0x840c0000
157 #define LWZ_0_12 0x800c0000
158 #define LWZ_11_3 0x81630000
159 #define LWZ_11_11 0x816b0000
160 #define LWZ_11_30 0x817e0000
161 #define LWZ_12_3 0x81830000
162 #define LWZ_12_12 0x818c0000
163 #define MR_0_3 0x7c601b78
164 #define MR_3_0 0x7c030378
165 #define MFLR_0 0x7c0802a6
166 #define MFLR_12 0x7d8802a6
167 #define MTCTR_0 0x7c0903a6
168 #define MTCTR_11 0x7d6903a6
169 #define MTLR_0 0x7c0803a6
170 #define NOP 0x60000000
171 #define SUB_11_11_12 0x7d6c5850
172
173 /* Offset of tp and dtp pointers from start of TLS block. */
174 #define TP_OFFSET 0x7000
175 #define DTP_OFFSET 0x8000
176
177 /* The value of a defined global symbol. */
178 #define SYM_VAL(SYM) \
179 ((SYM)->root.u.def.section->output_section->vma \
180 + (SYM)->root.u.def.section->output_offset \
181 + (SYM)->root.u.def.value)
182 \f
183 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
184
185 static reloc_howto_type ppc_elf_howto_raw[] = {
186 /* This reloc does nothing. */
187 HOWTO (R_PPC_NONE, /* type */
188 0, /* rightshift */
189 3, /* size (0 = byte, 1 = short, 2 = long) */
190 0, /* bitsize */
191 FALSE, /* pc_relative */
192 0, /* bitpos */
193 complain_overflow_dont, /* complain_on_overflow */
194 bfd_elf_generic_reloc, /* special_function */
195 "R_PPC_NONE", /* name */
196 FALSE, /* partial_inplace */
197 0, /* src_mask */
198 0, /* dst_mask */
199 FALSE), /* pcrel_offset */
200
201 /* A standard 32 bit relocation. */
202 HOWTO (R_PPC_ADDR32, /* type */
203 0, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 32, /* bitsize */
206 FALSE, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_dont, /* complain_on_overflow */
209 bfd_elf_generic_reloc, /* special_function */
210 "R_PPC_ADDR32", /* name */
211 FALSE, /* partial_inplace */
212 0, /* src_mask */
213 0xffffffff, /* dst_mask */
214 FALSE), /* pcrel_offset */
215
216 /* An absolute 26 bit branch; the lower two bits must be zero.
217 FIXME: we don't check that, we just clear them. */
218 HOWTO (R_PPC_ADDR24, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 26, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_signed, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_PPC_ADDR24", /* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0x3fffffc, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* A standard 16 bit relocation. */
233 HOWTO (R_PPC_ADDR16, /* type */
234 0, /* rightshift */
235 1, /* size (0 = byte, 1 = short, 2 = long) */
236 16, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_bitfield, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_PPC_ADDR16", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0xffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* A 16 bit relocation without overflow. */
248 HOWTO (R_PPC_ADDR16_LO, /* type */
249 0, /* rightshift */
250 1, /* size (0 = byte, 1 = short, 2 = long) */
251 16, /* bitsize */
252 FALSE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_dont,/* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_PPC_ADDR16_LO", /* name */
257 FALSE, /* partial_inplace */
258 0, /* src_mask */
259 0xffff, /* dst_mask */
260 FALSE), /* pcrel_offset */
261
262 /* The high order 16 bits of an address. */
263 HOWTO (R_PPC_ADDR16_HI, /* type */
264 16, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_dont, /* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_PPC_ADDR16_HI", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* The high order 16 bits of an address, plus 1 if the contents of
278 the low 16 bits, treated as a signed number, is negative. */
279 HOWTO (R_PPC_ADDR16_HA, /* type */
280 16, /* rightshift */
281 1, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_dont, /* complain_on_overflow */
286 ppc_elf_addr16_ha_reloc, /* special_function */
287 "R_PPC_ADDR16_HA", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xffff, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* An absolute 16 bit branch; the lower two bits must be zero.
294 FIXME: we don't check that, we just clear them. */
295 HOWTO (R_PPC_ADDR14, /* type */
296 0, /* rightshift */
297 2, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_signed, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC_ADDR14", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xfffc, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* An absolute 16 bit branch, for which bit 10 should be set to
310 indicate that the branch is expected to be taken. The lower two
311 bits must be zero. */
312 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
313 0, /* rightshift */
314 2, /* size (0 = byte, 1 = short, 2 = long) */
315 16, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_signed, /* complain_on_overflow */
319 bfd_elf_generic_reloc, /* special_function */
320 "R_PPC_ADDR14_BRTAKEN",/* name */
321 FALSE, /* partial_inplace */
322 0, /* src_mask */
323 0xfffc, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 /* An absolute 16 bit branch, for which bit 10 should be set to
327 indicate that the branch is not expected to be taken. The lower
328 two bits must be zero. */
329 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
330 0, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 16, /* bitsize */
333 FALSE, /* pc_relative */
334 0, /* bitpos */
335 complain_overflow_signed, /* complain_on_overflow */
336 bfd_elf_generic_reloc, /* special_function */
337 "R_PPC_ADDR14_BRNTAKEN",/* name */
338 FALSE, /* partial_inplace */
339 0, /* src_mask */
340 0xfffc, /* dst_mask */
341 FALSE), /* pcrel_offset */
342
343 /* A relative 26 bit branch; the lower two bits must be zero. */
344 HOWTO (R_PPC_REL24, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 26, /* bitsize */
348 TRUE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_signed, /* complain_on_overflow */
351 bfd_elf_generic_reloc, /* special_function */
352 "R_PPC_REL24", /* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x3fffffc, /* dst_mask */
356 TRUE), /* pcrel_offset */
357
358 /* A relative 16 bit branch; the lower two bits must be zero. */
359 HOWTO (R_PPC_REL14, /* type */
360 0, /* rightshift */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
362 16, /* bitsize */
363 TRUE, /* pc_relative */
364 0, /* bitpos */
365 complain_overflow_signed, /* complain_on_overflow */
366 bfd_elf_generic_reloc, /* special_function */
367 "R_PPC_REL14", /* name */
368 FALSE, /* partial_inplace */
369 0, /* src_mask */
370 0xfffc, /* dst_mask */
371 TRUE), /* pcrel_offset */
372
373 /* A relative 16 bit branch. Bit 10 should be set to indicate that
374 the branch is expected to be taken. The lower two bits must be
375 zero. */
376 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 16, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 bfd_elf_generic_reloc, /* special_function */
384 "R_PPC_REL14_BRTAKEN", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0xfffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch. Bit 10 should be set to indicate that
391 the branch is not expected to be taken. The lower two bits must
392 be zero. */
393 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
394 0, /* rightshift */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 TRUE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 bfd_elf_generic_reloc, /* special_function */
401 "R_PPC_REL14_BRNTAKEN",/* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0xfffc, /* dst_mask */
405 TRUE), /* pcrel_offset */
406
407 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
408 symbol. */
409 HOWTO (R_PPC_GOT16, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_signed, /* complain_on_overflow */
416 ppc_elf_unhandled_reloc, /* special_function */
417 "R_PPC_GOT16", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
424 the symbol. */
425 HOWTO (R_PPC_GOT16_LO, /* type */
426 0, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_dont, /* complain_on_overflow */
432 ppc_elf_unhandled_reloc, /* special_function */
433 "R_PPC_GOT16_LO", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
440 the symbol. */
441 HOWTO (R_PPC_GOT16_HI, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_dont, /* complain_on_overflow */
448 ppc_elf_unhandled_reloc, /* special_function */
449 "R_PPC_GOT16_HI", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC_GOT16_HA, /* type */
458 16, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc_elf_unhandled_reloc, /* special_function */
465 "R_PPC_GOT16_HA", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC_REL24, but referring to the procedure linkage table
472 entry for the symbol. */
473 HOWTO (R_PPC_PLTREL24, /* type */
474 0, /* rightshift */
475 2, /* size (0 = byte, 1 = short, 2 = long) */
476 26, /* bitsize */
477 TRUE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_signed, /* complain_on_overflow */
480 ppc_elf_unhandled_reloc, /* special_function */
481 "R_PPC_PLTREL24", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0x3fffffc, /* dst_mask */
485 TRUE), /* pcrel_offset */
486
487 /* This is used only by the dynamic linker. The symbol should exist
488 both in the object being run and in some shared library. The
489 dynamic linker copies the data addressed by the symbol from the
490 shared library into the object, because the object being
491 run has to have the data at some particular address. */
492 HOWTO (R_PPC_COPY, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 32, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_dont, /* complain_on_overflow */
499 ppc_elf_unhandled_reloc, /* special_function */
500 "R_PPC_COPY", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* Like R_PPC_ADDR32, but used when setting global offset table
507 entries. */
508 HOWTO (R_PPC_GLOB_DAT, /* type */
509 0, /* rightshift */
510 2, /* size (0 = byte, 1 = short, 2 = long) */
511 32, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc_elf_unhandled_reloc, /* special_function */
516 "R_PPC_GLOB_DAT", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0xffffffff, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Marks a procedure linkage table entry for a symbol. */
523 HOWTO (R_PPC_JMP_SLOT, /* type */
524 0, /* rightshift */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
526 32, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_dont, /* complain_on_overflow */
530 ppc_elf_unhandled_reloc, /* special_function */
531 "R_PPC_JMP_SLOT", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Used only by the dynamic linker. When the object is run, this
538 longword is set to the load address of the object, plus the
539 addend. */
540 HOWTO (R_PPC_RELATIVE, /* type */
541 0, /* rightshift */
542 2, /* size (0 = byte, 1 = short, 2 = long) */
543 32, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 bfd_elf_generic_reloc, /* special_function */
548 "R_PPC_RELATIVE", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0xffffffff, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Like R_PPC_REL24, but uses the value of the symbol within the
555 object rather than the final value. Normally used for
556 _GLOBAL_OFFSET_TABLE_. */
557 HOWTO (R_PPC_LOCAL24PC, /* type */
558 0, /* rightshift */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
560 26, /* bitsize */
561 TRUE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_signed, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC_LOCAL24PC", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 0x3fffffc, /* dst_mask */
569 TRUE), /* pcrel_offset */
570
571 /* Like R_PPC_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_dont, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative */
602 HOWTO (R_PPC_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_dont, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC_REL32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0xffffffff, /* dst_mask */
614 TRUE), /* pcrel_offset */
615
616 /* 32-bit relocation to the symbol's procedure linkage table.
617 FIXME: not supported. */
618 HOWTO (R_PPC_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_dont, /* complain_on_overflow */
625 ppc_elf_unhandled_reloc, /* special_function */
626 "R_PPC_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: not supported. */
634 HOWTO (R_PPC_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont, /* complain_on_overflow */
641 ppc_elf_unhandled_reloc, /* special_function */
642 "R_PPC_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc_elf_unhandled_reloc, /* special_function */
658 "R_PPC_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 ppc_elf_unhandled_reloc, /* special_function */
674 "R_PPC_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc_elf_unhandled_reloc, /* special_function */
690 "R_PPC_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
697 small data items. */
698 HOWTO (R_PPC_SDAREL16, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_signed, /* complain_on_overflow */
705 ppc_elf_unhandled_reloc, /* special_function */
706 "R_PPC_SDAREL16", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* 16-bit section relative relocation. */
713 HOWTO (R_PPC_SECTOFF, /* type */
714 0, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_signed, /* complain_on_overflow */
720 ppc_elf_unhandled_reloc, /* special_function */
721 "R_PPC_SECTOFF", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit lower half section relative relocation. */
728 HOWTO (R_PPC_SECTOFF_LO, /* type */
729 0, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 ppc_elf_unhandled_reloc, /* special_function */
736 "R_PPC_SECTOFF_LO", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* 16-bit upper half section relative relocation. */
743 HOWTO (R_PPC_SECTOFF_HI, /* type */
744 16, /* rightshift */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
746 16, /* bitsize */
747 FALSE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 ppc_elf_unhandled_reloc, /* special_function */
751 "R_PPC_SECTOFF_HI", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE), /* pcrel_offset */
756
757 /* 16-bit upper half adjusted section relative relocation. */
758 HOWTO (R_PPC_SECTOFF_HA, /* type */
759 16, /* rightshift */
760 1, /* size (0 = byte, 1 = short, 2 = long) */
761 16, /* bitsize */
762 FALSE, /* pc_relative */
763 0, /* bitpos */
764 complain_overflow_dont, /* complain_on_overflow */
765 ppc_elf_unhandled_reloc, /* special_function */
766 "R_PPC_SECTOFF_HA", /* name */
767 FALSE, /* partial_inplace */
768 0, /* src_mask */
769 0xffff, /* dst_mask */
770 FALSE), /* pcrel_offset */
771
772 /* Marker relocs for TLS. */
773 HOWTO (R_PPC_TLS,
774 0, /* rightshift */
775 2, /* size (0 = byte, 1 = short, 2 = long) */
776 32, /* bitsize */
777 FALSE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont, /* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 "R_PPC_TLS", /* name */
782 FALSE, /* partial_inplace */
783 0, /* src_mask */
784 0, /* dst_mask */
785 FALSE), /* pcrel_offset */
786
787 HOWTO (R_PPC_TLSGD,
788 0, /* rightshift */
789 2, /* size (0 = byte, 1 = short, 2 = long) */
790 32, /* bitsize */
791 FALSE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_dont, /* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_PPC_TLSGD", /* name */
796 FALSE, /* partial_inplace */
797 0, /* src_mask */
798 0, /* dst_mask */
799 FALSE), /* pcrel_offset */
800
801 HOWTO (R_PPC_TLSLD,
802 0, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 32, /* bitsize */
805 FALSE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_dont, /* complain_on_overflow */
808 bfd_elf_generic_reloc, /* special_function */
809 "R_PPC_TLSLD", /* name */
810 FALSE, /* partial_inplace */
811 0, /* src_mask */
812 0, /* dst_mask */
813 FALSE), /* pcrel_offset */
814
815 /* Computes the load module index of the load module that contains the
816 definition of its TLS sym. */
817 HOWTO (R_PPC_DTPMOD32,
818 0, /* rightshift */
819 2, /* size (0 = byte, 1 = short, 2 = long) */
820 32, /* bitsize */
821 FALSE, /* pc_relative */
822 0, /* bitpos */
823 complain_overflow_dont, /* complain_on_overflow */
824 ppc_elf_unhandled_reloc, /* special_function */
825 "R_PPC_DTPMOD32", /* name */
826 FALSE, /* partial_inplace */
827 0, /* src_mask */
828 0xffffffff, /* dst_mask */
829 FALSE), /* pcrel_offset */
830
831 /* Computes a dtv-relative displacement, the difference between the value
832 of sym+add and the base address of the thread-local storage block that
833 contains the definition of sym, minus 0x8000. */
834 HOWTO (R_PPC_DTPREL32,
835 0, /* rightshift */
836 2, /* size (0 = byte, 1 = short, 2 = long) */
837 32, /* bitsize */
838 FALSE, /* pc_relative */
839 0, /* bitpos */
840 complain_overflow_dont, /* complain_on_overflow */
841 ppc_elf_unhandled_reloc, /* special_function */
842 "R_PPC_DTPREL32", /* name */
843 FALSE, /* partial_inplace */
844 0, /* src_mask */
845 0xffffffff, /* dst_mask */
846 FALSE), /* pcrel_offset */
847
848 /* A 16 bit dtprel reloc. */
849 HOWTO (R_PPC_DTPREL16,
850 0, /* rightshift */
851 1, /* size (0 = byte, 1 = short, 2 = long) */
852 16, /* bitsize */
853 FALSE, /* pc_relative */
854 0, /* bitpos */
855 complain_overflow_signed, /* complain_on_overflow */
856 ppc_elf_unhandled_reloc, /* special_function */
857 "R_PPC_DTPREL16", /* name */
858 FALSE, /* partial_inplace */
859 0, /* src_mask */
860 0xffff, /* dst_mask */
861 FALSE), /* pcrel_offset */
862
863 /* Like DTPREL16, but no overflow. */
864 HOWTO (R_PPC_DTPREL16_LO,
865 0, /* rightshift */
866 1, /* size (0 = byte, 1 = short, 2 = long) */
867 16, /* bitsize */
868 FALSE, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont, /* complain_on_overflow */
871 ppc_elf_unhandled_reloc, /* special_function */
872 "R_PPC_DTPREL16_LO", /* name */
873 FALSE, /* partial_inplace */
874 0, /* src_mask */
875 0xffff, /* dst_mask */
876 FALSE), /* pcrel_offset */
877
878 /* Like DTPREL16_LO, but next higher group of 16 bits. */
879 HOWTO (R_PPC_DTPREL16_HI,
880 16, /* rightshift */
881 1, /* size (0 = byte, 1 = short, 2 = long) */
882 16, /* bitsize */
883 FALSE, /* pc_relative */
884 0, /* bitpos */
885 complain_overflow_dont, /* complain_on_overflow */
886 ppc_elf_unhandled_reloc, /* special_function */
887 "R_PPC_DTPREL16_HI", /* name */
888 FALSE, /* partial_inplace */
889 0, /* src_mask */
890 0xffff, /* dst_mask */
891 FALSE), /* pcrel_offset */
892
893 /* Like DTPREL16_HI, but adjust for low 16 bits. */
894 HOWTO (R_PPC_DTPREL16_HA,
895 16, /* rightshift */
896 1, /* size (0 = byte, 1 = short, 2 = long) */
897 16, /* bitsize */
898 FALSE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont, /* complain_on_overflow */
901 ppc_elf_unhandled_reloc, /* special_function */
902 "R_PPC_DTPREL16_HA", /* name */
903 FALSE, /* partial_inplace */
904 0, /* src_mask */
905 0xffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
907
908 /* Computes a tp-relative displacement, the difference between the value of
909 sym+add and the value of the thread pointer (r13). */
910 HOWTO (R_PPC_TPREL32,
911 0, /* rightshift */
912 2, /* size (0 = byte, 1 = short, 2 = long) */
913 32, /* bitsize */
914 FALSE, /* pc_relative */
915 0, /* bitpos */
916 complain_overflow_dont, /* complain_on_overflow */
917 ppc_elf_unhandled_reloc, /* special_function */
918 "R_PPC_TPREL32", /* name */
919 FALSE, /* partial_inplace */
920 0, /* src_mask */
921 0xffffffff, /* dst_mask */
922 FALSE), /* pcrel_offset */
923
924 /* A 16 bit tprel reloc. */
925 HOWTO (R_PPC_TPREL16,
926 0, /* rightshift */
927 1, /* size (0 = byte, 1 = short, 2 = long) */
928 16, /* bitsize */
929 FALSE, /* pc_relative */
930 0, /* bitpos */
931 complain_overflow_signed, /* complain_on_overflow */
932 ppc_elf_unhandled_reloc, /* special_function */
933 "R_PPC_TPREL16", /* name */
934 FALSE, /* partial_inplace */
935 0, /* src_mask */
936 0xffff, /* dst_mask */
937 FALSE), /* pcrel_offset */
938
939 /* Like TPREL16, but no overflow. */
940 HOWTO (R_PPC_TPREL16_LO,
941 0, /* rightshift */
942 1, /* size (0 = byte, 1 = short, 2 = long) */
943 16, /* bitsize */
944 FALSE, /* pc_relative */
945 0, /* bitpos */
946 complain_overflow_dont, /* complain_on_overflow */
947 ppc_elf_unhandled_reloc, /* special_function */
948 "R_PPC_TPREL16_LO", /* name */
949 FALSE, /* partial_inplace */
950 0, /* src_mask */
951 0xffff, /* dst_mask */
952 FALSE), /* pcrel_offset */
953
954 /* Like TPREL16_LO, but next higher group of 16 bits. */
955 HOWTO (R_PPC_TPREL16_HI,
956 16, /* rightshift */
957 1, /* size (0 = byte, 1 = short, 2 = long) */
958 16, /* bitsize */
959 FALSE, /* pc_relative */
960 0, /* bitpos */
961 complain_overflow_dont, /* complain_on_overflow */
962 ppc_elf_unhandled_reloc, /* special_function */
963 "R_PPC_TPREL16_HI", /* name */
964 FALSE, /* partial_inplace */
965 0, /* src_mask */
966 0xffff, /* dst_mask */
967 FALSE), /* pcrel_offset */
968
969 /* Like TPREL16_HI, but adjust for low 16 bits. */
970 HOWTO (R_PPC_TPREL16_HA,
971 16, /* rightshift */
972 1, /* size (0 = byte, 1 = short, 2 = long) */
973 16, /* bitsize */
974 FALSE, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_dont, /* complain_on_overflow */
977 ppc_elf_unhandled_reloc, /* special_function */
978 "R_PPC_TPREL16_HA", /* name */
979 FALSE, /* partial_inplace */
980 0, /* src_mask */
981 0xffff, /* dst_mask */
982 FALSE), /* pcrel_offset */
983
984 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
985 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
986 to the first entry. */
987 HOWTO (R_PPC_GOT_TLSGD16,
988 0, /* rightshift */
989 1, /* size (0 = byte, 1 = short, 2 = long) */
990 16, /* bitsize */
991 FALSE, /* pc_relative */
992 0, /* bitpos */
993 complain_overflow_signed, /* complain_on_overflow */
994 ppc_elf_unhandled_reloc, /* special_function */
995 "R_PPC_GOT_TLSGD16", /* name */
996 FALSE, /* partial_inplace */
997 0, /* src_mask */
998 0xffff, /* dst_mask */
999 FALSE), /* pcrel_offset */
1000
1001 /* Like GOT_TLSGD16, but no overflow. */
1002 HOWTO (R_PPC_GOT_TLSGD16_LO,
1003 0, /* rightshift */
1004 1, /* size (0 = byte, 1 = short, 2 = long) */
1005 16, /* bitsize */
1006 FALSE, /* pc_relative */
1007 0, /* bitpos */
1008 complain_overflow_dont, /* complain_on_overflow */
1009 ppc_elf_unhandled_reloc, /* special_function */
1010 "R_PPC_GOT_TLSGD16_LO", /* name */
1011 FALSE, /* partial_inplace */
1012 0, /* src_mask */
1013 0xffff, /* dst_mask */
1014 FALSE), /* pcrel_offset */
1015
1016 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1017 HOWTO (R_PPC_GOT_TLSGD16_HI,
1018 16, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_dont, /* complain_on_overflow */
1024 ppc_elf_unhandled_reloc, /* special_function */
1025 "R_PPC_GOT_TLSGD16_HI", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1032 HOWTO (R_PPC_GOT_TLSGD16_HA,
1033 16, /* rightshift */
1034 1, /* size (0 = byte, 1 = short, 2 = long) */
1035 16, /* bitsize */
1036 FALSE, /* pc_relative */
1037 0, /* bitpos */
1038 complain_overflow_dont, /* complain_on_overflow */
1039 ppc_elf_unhandled_reloc, /* special_function */
1040 "R_PPC_GOT_TLSGD16_HA", /* name */
1041 FALSE, /* partial_inplace */
1042 0, /* src_mask */
1043 0xffff, /* dst_mask */
1044 FALSE), /* pcrel_offset */
1045
1046 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1047 with values (sym+add)@dtpmod and zero, and computes the offset to the
1048 first entry. */
1049 HOWTO (R_PPC_GOT_TLSLD16,
1050 0, /* rightshift */
1051 1, /* size (0 = byte, 1 = short, 2 = long) */
1052 16, /* bitsize */
1053 FALSE, /* pc_relative */
1054 0, /* bitpos */
1055 complain_overflow_signed, /* complain_on_overflow */
1056 ppc_elf_unhandled_reloc, /* special_function */
1057 "R_PPC_GOT_TLSLD16", /* name */
1058 FALSE, /* partial_inplace */
1059 0, /* src_mask */
1060 0xffff, /* dst_mask */
1061 FALSE), /* pcrel_offset */
1062
1063 /* Like GOT_TLSLD16, but no overflow. */
1064 HOWTO (R_PPC_GOT_TLSLD16_LO,
1065 0, /* rightshift */
1066 1, /* size (0 = byte, 1 = short, 2 = long) */
1067 16, /* bitsize */
1068 FALSE, /* pc_relative */
1069 0, /* bitpos */
1070 complain_overflow_dont, /* complain_on_overflow */
1071 ppc_elf_unhandled_reloc, /* special_function */
1072 "R_PPC_GOT_TLSLD16_LO", /* name */
1073 FALSE, /* partial_inplace */
1074 0, /* src_mask */
1075 0xffff, /* dst_mask */
1076 FALSE), /* pcrel_offset */
1077
1078 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1079 HOWTO (R_PPC_GOT_TLSLD16_HI,
1080 16, /* rightshift */
1081 1, /* size (0 = byte, 1 = short, 2 = long) */
1082 16, /* bitsize */
1083 FALSE, /* pc_relative */
1084 0, /* bitpos */
1085 complain_overflow_dont, /* complain_on_overflow */
1086 ppc_elf_unhandled_reloc, /* special_function */
1087 "R_PPC_GOT_TLSLD16_HI", /* name */
1088 FALSE, /* partial_inplace */
1089 0, /* src_mask */
1090 0xffff, /* dst_mask */
1091 FALSE), /* pcrel_offset */
1092
1093 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1094 HOWTO (R_PPC_GOT_TLSLD16_HA,
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_dont, /* complain_on_overflow */
1101 ppc_elf_unhandled_reloc, /* special_function */
1102 "R_PPC_GOT_TLSLD16_HA", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1109 the offset to the entry. */
1110 HOWTO (R_PPC_GOT_DTPREL16,
1111 0, /* rightshift */
1112 1, /* size (0 = byte, 1 = short, 2 = long) */
1113 16, /* bitsize */
1114 FALSE, /* pc_relative */
1115 0, /* bitpos */
1116 complain_overflow_signed, /* complain_on_overflow */
1117 ppc_elf_unhandled_reloc, /* special_function */
1118 "R_PPC_GOT_DTPREL16", /* name */
1119 FALSE, /* partial_inplace */
1120 0, /* src_mask */
1121 0xffff, /* dst_mask */
1122 FALSE), /* pcrel_offset */
1123
1124 /* Like GOT_DTPREL16, but no overflow. */
1125 HOWTO (R_PPC_GOT_DTPREL16_LO,
1126 0, /* rightshift */
1127 1, /* size (0 = byte, 1 = short, 2 = long) */
1128 16, /* bitsize */
1129 FALSE, /* pc_relative */
1130 0, /* bitpos */
1131 complain_overflow_dont, /* complain_on_overflow */
1132 ppc_elf_unhandled_reloc, /* special_function */
1133 "R_PPC_GOT_DTPREL16_LO", /* name */
1134 FALSE, /* partial_inplace */
1135 0, /* src_mask */
1136 0xffff, /* dst_mask */
1137 FALSE), /* pcrel_offset */
1138
1139 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1140 HOWTO (R_PPC_GOT_DTPREL16_HI,
1141 16, /* rightshift */
1142 1, /* size (0 = byte, 1 = short, 2 = long) */
1143 16, /* bitsize */
1144 FALSE, /* pc_relative */
1145 0, /* bitpos */
1146 complain_overflow_dont, /* complain_on_overflow */
1147 ppc_elf_unhandled_reloc, /* special_function */
1148 "R_PPC_GOT_DTPREL16_HI", /* name */
1149 FALSE, /* partial_inplace */
1150 0, /* src_mask */
1151 0xffff, /* dst_mask */
1152 FALSE), /* pcrel_offset */
1153
1154 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1155 HOWTO (R_PPC_GOT_DTPREL16_HA,
1156 16, /* rightshift */
1157 1, /* size (0 = byte, 1 = short, 2 = long) */
1158 16, /* bitsize */
1159 FALSE, /* pc_relative */
1160 0, /* bitpos */
1161 complain_overflow_dont, /* complain_on_overflow */
1162 ppc_elf_unhandled_reloc, /* special_function */
1163 "R_PPC_GOT_DTPREL16_HA", /* name */
1164 FALSE, /* partial_inplace */
1165 0, /* src_mask */
1166 0xffff, /* dst_mask */
1167 FALSE), /* pcrel_offset */
1168
1169 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1170 offset to the entry. */
1171 HOWTO (R_PPC_GOT_TPREL16,
1172 0, /* rightshift */
1173 1, /* size (0 = byte, 1 = short, 2 = long) */
1174 16, /* bitsize */
1175 FALSE, /* pc_relative */
1176 0, /* bitpos */
1177 complain_overflow_signed, /* complain_on_overflow */
1178 ppc_elf_unhandled_reloc, /* special_function */
1179 "R_PPC_GOT_TPREL16", /* name */
1180 FALSE, /* partial_inplace */
1181 0, /* src_mask */
1182 0xffff, /* dst_mask */
1183 FALSE), /* pcrel_offset */
1184
1185 /* Like GOT_TPREL16, but no overflow. */
1186 HOWTO (R_PPC_GOT_TPREL16_LO,
1187 0, /* rightshift */
1188 1, /* size (0 = byte, 1 = short, 2 = long) */
1189 16, /* bitsize */
1190 FALSE, /* pc_relative */
1191 0, /* bitpos */
1192 complain_overflow_dont, /* complain_on_overflow */
1193 ppc_elf_unhandled_reloc, /* special_function */
1194 "R_PPC_GOT_TPREL16_LO", /* name */
1195 FALSE, /* partial_inplace */
1196 0, /* src_mask */
1197 0xffff, /* dst_mask */
1198 FALSE), /* pcrel_offset */
1199
1200 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1201 HOWTO (R_PPC_GOT_TPREL16_HI,
1202 16, /* rightshift */
1203 1, /* size (0 = byte, 1 = short, 2 = long) */
1204 16, /* bitsize */
1205 FALSE, /* pc_relative */
1206 0, /* bitpos */
1207 complain_overflow_dont, /* complain_on_overflow */
1208 ppc_elf_unhandled_reloc, /* special_function */
1209 "R_PPC_GOT_TPREL16_HI", /* name */
1210 FALSE, /* partial_inplace */
1211 0, /* src_mask */
1212 0xffff, /* dst_mask */
1213 FALSE), /* pcrel_offset */
1214
1215 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1216 HOWTO (R_PPC_GOT_TPREL16_HA,
1217 16, /* rightshift */
1218 1, /* size (0 = byte, 1 = short, 2 = long) */
1219 16, /* bitsize */
1220 FALSE, /* pc_relative */
1221 0, /* bitpos */
1222 complain_overflow_dont, /* complain_on_overflow */
1223 ppc_elf_unhandled_reloc, /* special_function */
1224 "R_PPC_GOT_TPREL16_HA", /* name */
1225 FALSE, /* partial_inplace */
1226 0, /* src_mask */
1227 0xffff, /* dst_mask */
1228 FALSE), /* pcrel_offset */
1229
1230 /* The remaining relocs are from the Embedded ELF ABI, and are not
1231 in the SVR4 ELF ABI. */
1232
1233 /* 32 bit value resulting from the addend minus the symbol. */
1234 HOWTO (R_PPC_EMB_NADDR32, /* type */
1235 0, /* rightshift */
1236 2, /* size (0 = byte, 1 = short, 2 = long) */
1237 32, /* bitsize */
1238 FALSE, /* pc_relative */
1239 0, /* bitpos */
1240 complain_overflow_dont, /* complain_on_overflow */
1241 ppc_elf_unhandled_reloc, /* special_function */
1242 "R_PPC_EMB_NADDR32", /* name */
1243 FALSE, /* partial_inplace */
1244 0, /* src_mask */
1245 0xffffffff, /* dst_mask */
1246 FALSE), /* pcrel_offset */
1247
1248 /* 16 bit value resulting from the addend minus the symbol. */
1249 HOWTO (R_PPC_EMB_NADDR16, /* type */
1250 0, /* rightshift */
1251 1, /* size (0 = byte, 1 = short, 2 = long) */
1252 16, /* bitsize */
1253 FALSE, /* pc_relative */
1254 0, /* bitpos */
1255 complain_overflow_signed, /* complain_on_overflow */
1256 ppc_elf_unhandled_reloc, /* special_function */
1257 "R_PPC_EMB_NADDR16", /* name */
1258 FALSE, /* partial_inplace */
1259 0, /* src_mask */
1260 0xffff, /* dst_mask */
1261 FALSE), /* pcrel_offset */
1262
1263 /* 16 bit value resulting from the addend minus the symbol. */
1264 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1265 0, /* rightshift */
1266 1, /* size (0 = byte, 1 = short, 2 = long) */
1267 16, /* bitsize */
1268 FALSE, /* pc_relative */
1269 0, /* bitpos */
1270 complain_overflow_dont,/* complain_on_overflow */
1271 ppc_elf_unhandled_reloc, /* special_function */
1272 "R_PPC_EMB_ADDR16_LO", /* name */
1273 FALSE, /* partial_inplace */
1274 0, /* src_mask */
1275 0xffff, /* dst_mask */
1276 FALSE), /* pcrel_offset */
1277
1278 /* The high order 16 bits of the addend minus the symbol. */
1279 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1280 16, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc_elf_unhandled_reloc, /* special_function */
1287 "R_PPC_EMB_NADDR16_HI", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xffff, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* The high order 16 bits of the result of the addend minus the address,
1294 plus 1 if the contents of the low 16 bits, treated as a signed number,
1295 is negative. */
1296 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1297 16, /* rightshift */
1298 1, /* size (0 = byte, 1 = short, 2 = long) */
1299 16, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_dont, /* complain_on_overflow */
1303 ppc_elf_unhandled_reloc, /* special_function */
1304 "R_PPC_EMB_NADDR16_HA", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0xffff, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 /* 16 bit value resulting from allocating a 4 byte word to hold an
1311 address in the .sdata section, and returning the offset from
1312 _SDA_BASE_ for that relocation. */
1313 HOWTO (R_PPC_EMB_SDAI16, /* type */
1314 0, /* rightshift */
1315 1, /* size (0 = byte, 1 = short, 2 = long) */
1316 16, /* bitsize */
1317 FALSE, /* pc_relative */
1318 0, /* bitpos */
1319 complain_overflow_signed, /* complain_on_overflow */
1320 ppc_elf_unhandled_reloc, /* special_function */
1321 "R_PPC_EMB_SDAI16", /* name */
1322 FALSE, /* partial_inplace */
1323 0, /* src_mask */
1324 0xffff, /* dst_mask */
1325 FALSE), /* pcrel_offset */
1326
1327 /* 16 bit value resulting from allocating a 4 byte word to hold an
1328 address in the .sdata2 section, and returning the offset from
1329 _SDA2_BASE_ for that relocation. */
1330 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1331 0, /* rightshift */
1332 1, /* size (0 = byte, 1 = short, 2 = long) */
1333 16, /* bitsize */
1334 FALSE, /* pc_relative */
1335 0, /* bitpos */
1336 complain_overflow_signed, /* complain_on_overflow */
1337 ppc_elf_unhandled_reloc, /* special_function */
1338 "R_PPC_EMB_SDA2I16", /* name */
1339 FALSE, /* partial_inplace */
1340 0, /* src_mask */
1341 0xffff, /* dst_mask */
1342 FALSE), /* pcrel_offset */
1343
1344 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1345 small data items. */
1346 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1347 0, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_signed, /* complain_on_overflow */
1353 ppc_elf_unhandled_reloc, /* special_function */
1354 "R_PPC_EMB_SDA2REL", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1361 signed offset from the appropriate base, and filling in the register
1362 field with the appropriate register (0, 2, or 13). */
1363 HOWTO (R_PPC_EMB_SDA21, /* type */
1364 0, /* rightshift */
1365 2, /* size (0 = byte, 1 = short, 2 = long) */
1366 16, /* bitsize */
1367 FALSE, /* pc_relative */
1368 0, /* bitpos */
1369 complain_overflow_signed, /* complain_on_overflow */
1370 ppc_elf_unhandled_reloc, /* special_function */
1371 "R_PPC_EMB_SDA21", /* name */
1372 FALSE, /* partial_inplace */
1373 0, /* src_mask */
1374 0xffff, /* dst_mask */
1375 FALSE), /* pcrel_offset */
1376
1377 /* Relocation not handled: R_PPC_EMB_MRKREF */
1378 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1379 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1380 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1382 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1383
1384 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1385 in the 16 bit signed offset from the appropriate base, and filling in the
1386 register field with the appropriate register (0, 2, or 13). */
1387 HOWTO (R_PPC_EMB_RELSDA, /* type */
1388 0, /* rightshift */
1389 1, /* size (0 = byte, 1 = short, 2 = long) */
1390 16, /* bitsize */
1391 FALSE, /* pc_relative */
1392 0, /* bitpos */
1393 complain_overflow_signed, /* complain_on_overflow */
1394 ppc_elf_unhandled_reloc, /* special_function */
1395 "R_PPC_EMB_RELSDA", /* name */
1396 FALSE, /* partial_inplace */
1397 0, /* src_mask */
1398 0xffff, /* dst_mask */
1399 FALSE), /* pcrel_offset */
1400
1401 /* A relative 8 bit branch. */
1402 HOWTO (R_PPC_VLE_REL8, /* type */
1403 1, /* rightshift */
1404 1, /* size (0 = byte, 1 = short, 2 = long) */
1405 8, /* bitsize */
1406 TRUE, /* pc_relative */
1407 0, /* bitpos */
1408 complain_overflow_signed, /* complain_on_overflow */
1409 bfd_elf_generic_reloc, /* special_function */
1410 "R_PPC_VLE_REL8", /* name */
1411 FALSE, /* partial_inplace */
1412 0, /* src_mask */
1413 0xff, /* dst_mask */
1414 TRUE), /* pcrel_offset */
1415
1416 /* A relative 15 bit branch. */
1417 HOWTO (R_PPC_VLE_REL15, /* type */
1418 1, /* rightshift */
1419 2, /* size (0 = byte, 1 = short, 2 = long) */
1420 15, /* bitsize */
1421 TRUE, /* pc_relative */
1422 1, /* bitpos */
1423 complain_overflow_signed, /* complain_on_overflow */
1424 bfd_elf_generic_reloc, /* special_function */
1425 "R_PPC_VLE_REL15", /* name */
1426 FALSE, /* partial_inplace */
1427 0, /* src_mask */
1428 0xfffe, /* dst_mask */
1429 TRUE), /* pcrel_offset */
1430
1431 /* A relative 24 bit branch. */
1432 HOWTO (R_PPC_VLE_REL24, /* type */
1433 1, /* rightshift */
1434 2, /* size (0 = byte, 1 = short, 2 = long) */
1435 24, /* bitsize */
1436 TRUE, /* pc_relative */
1437 1, /* bitpos */
1438 complain_overflow_signed, /* complain_on_overflow */
1439 bfd_elf_generic_reloc, /* special_function */
1440 "R_PPC_VLE_REL24", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 0x1fffffe, /* dst_mask */
1444 TRUE), /* pcrel_offset */
1445
1446 /* The 16 LSBS in split16a format. */
1447 HOWTO (R_PPC_VLE_LO16A, /* type */
1448 0, /* rightshift */
1449 2, /* size (0 = byte, 1 = short, 2 = long) */
1450 16, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_dont, /* complain_on_overflow */
1454 ppc_elf_unhandled_reloc, /* special_function */
1455 "R_PPC_VLE_LO16A", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0x1f007ff, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 /* The 16 LSBS in split16d format. */
1462 HOWTO (R_PPC_VLE_LO16D, /* type */
1463 0, /* rightshift */
1464 2, /* size (0 = byte, 1 = short, 2 = long) */
1465 16, /* bitsize */
1466 FALSE, /* pc_relative */
1467 0, /* bitpos */
1468 complain_overflow_dont, /* complain_on_overflow */
1469 ppc_elf_unhandled_reloc, /* special_function */
1470 "R_PPC_VLE_LO16D", /* name */
1471 FALSE, /* partial_inplace */
1472 0, /* src_mask */
1473 0x1f07ff, /* dst_mask */
1474 FALSE), /* pcrel_offset */
1475
1476 /* Bits 16-31 split16a format. */
1477 HOWTO (R_PPC_VLE_HI16A, /* type */
1478 16, /* rightshift */
1479 2, /* size (0 = byte, 1 = short, 2 = long) */
1480 16, /* bitsize */
1481 FALSE, /* pc_relative */
1482 0, /* bitpos */
1483 complain_overflow_dont, /* complain_on_overflow */
1484 ppc_elf_unhandled_reloc, /* special_function */
1485 "R_PPC_VLE_HI16A", /* name */
1486 FALSE, /* partial_inplace */
1487 0, /* src_mask */
1488 0x1f007ff, /* dst_mask */
1489 FALSE), /* pcrel_offset */
1490
1491 /* Bits 16-31 split16d format. */
1492 HOWTO (R_PPC_VLE_HI16D, /* type */
1493 16, /* rightshift */
1494 2, /* size (0 = byte, 1 = short, 2 = long) */
1495 16, /* bitsize */
1496 FALSE, /* pc_relative */
1497 0, /* bitpos */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc_elf_unhandled_reloc, /* special_function */
1500 "R_PPC_VLE_HI16D", /* name */
1501 FALSE, /* partial_inplace */
1502 0, /* src_mask */
1503 0x1f07ff, /* dst_mask */
1504 FALSE), /* pcrel_offset */
1505
1506 /* Bits 16-31 (High Adjusted) in split16a format. */
1507 HOWTO (R_PPC_VLE_HA16A, /* type */
1508 16, /* rightshift */
1509 2, /* size (0 = byte, 1 = short, 2 = long) */
1510 16, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_dont, /* complain_on_overflow */
1514 ppc_elf_unhandled_reloc, /* special_function */
1515 "R_PPC_VLE_HA16A", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 0x1f007ff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* Bits 16-31 (High Adjusted) in split16d format. */
1522 HOWTO (R_PPC_VLE_HA16D, /* type */
1523 16, /* rightshift */
1524 2, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc_elf_unhandled_reloc, /* special_function */
1530 "R_PPC_VLE_HA16D", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0x1f07ff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1537 instructions. If the register base is 0 then the linker changes
1538 the e_add16i to an e_li instruction. */
1539 HOWTO (R_PPC_VLE_SDA21, /* type */
1540 0, /* rightshift */
1541 2, /* size (0 = byte, 1 = short, 2 = long) */
1542 16, /* bitsize */
1543 FALSE, /* pc_relative */
1544 0, /* bitpos */
1545 complain_overflow_signed, /* complain_on_overflow */
1546 ppc_elf_unhandled_reloc, /* special_function */
1547 "R_PPC_VLE_SDA21", /* name */
1548 FALSE, /* partial_inplace */
1549 0, /* src_mask */
1550 0xffff, /* dst_mask */
1551 FALSE), /* pcrel_offset */
1552
1553 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1554 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1555 0, /* rightshift */
1556 2, /* size (0 = byte, 1 = short, 2 = long) */
1557 16, /* bitsize */
1558 FALSE, /* pc_relative */
1559 0, /* bitpos */
1560 complain_overflow_dont, /* complain_on_overflow */
1561 ppc_elf_unhandled_reloc, /* special_function */
1562 "R_PPC_VLE_SDA21_LO", /* name */
1563 FALSE, /* partial_inplace */
1564 0, /* src_mask */
1565 0xffff, /* dst_mask */
1566 FALSE), /* pcrel_offset */
1567
1568 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1569 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1570 0, /* rightshift */
1571 2, /* size (0 = byte, 1 = short, 2 = long) */
1572 16, /* bitsize */
1573 FALSE, /* pc_relative */
1574 0, /* bitpos */
1575 complain_overflow_dont, /* complain_on_overflow */
1576 ppc_elf_unhandled_reloc, /* special_function */
1577 "R_PPC_VLE_SDAREL_LO16A", /* name */
1578 FALSE, /* partial_inplace */
1579 0, /* src_mask */
1580 0x1f007ff, /* dst_mask */
1581 FALSE), /* pcrel_offset */
1582
1583 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1584 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1585 0, /* rightshift */
1586 2, /* size (0 = byte, 1 = short, 2 = long) */
1587 16, /* bitsize */
1588 FALSE, /* pc_relative */
1589 0, /* bitpos */
1590 complain_overflow_dont, /* complain_on_overflow */
1591 ppc_elf_unhandled_reloc, /* special_function */
1592 "R_PPC_VLE_SDAREL_LO16D", /* name */
1593 FALSE, /* partial_inplace */
1594 0, /* src_mask */
1595 0x1f07ff, /* dst_mask */
1596 FALSE), /* pcrel_offset */
1597
1598 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1599 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1600 16, /* rightshift */
1601 2, /* size (0 = byte, 1 = short, 2 = long) */
1602 16, /* bitsize */
1603 FALSE, /* pc_relative */
1604 0, /* bitpos */
1605 complain_overflow_dont, /* complain_on_overflow */
1606 ppc_elf_unhandled_reloc, /* special_function */
1607 "R_PPC_VLE_SDAREL_HI16A", /* name */
1608 FALSE, /* partial_inplace */
1609 0, /* src_mask */
1610 0x1f007ff, /* dst_mask */
1611 FALSE), /* pcrel_offset */
1612
1613 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1614 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1615 16, /* rightshift */
1616 2, /* size (0 = byte, 1 = short, 2 = long) */
1617 16, /* bitsize */
1618 FALSE, /* pc_relative */
1619 0, /* bitpos */
1620 complain_overflow_dont, /* complain_on_overflow */
1621 ppc_elf_unhandled_reloc, /* special_function */
1622 "R_PPC_VLE_SDAREL_HI16D", /* name */
1623 FALSE, /* partial_inplace */
1624 0, /* src_mask */
1625 0x1f07ff, /* dst_mask */
1626 FALSE), /* pcrel_offset */
1627
1628 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1629 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1630 16, /* rightshift */
1631 2, /* size (0 = byte, 1 = short, 2 = long) */
1632 16, /* bitsize */
1633 FALSE, /* pc_relative */
1634 0, /* bitpos */
1635 complain_overflow_dont, /* complain_on_overflow */
1636 ppc_elf_unhandled_reloc, /* special_function */
1637 "R_PPC_VLE_SDAREL_HA16A", /* name */
1638 FALSE, /* partial_inplace */
1639 0, /* src_mask */
1640 0x1f007ff, /* dst_mask */
1641 FALSE), /* pcrel_offset */
1642
1643 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1644 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1645 16, /* rightshift */
1646 2, /* size (0 = byte, 1 = short, 2 = long) */
1647 16, /* bitsize */
1648 FALSE, /* pc_relative */
1649 0, /* bitpos */
1650 complain_overflow_dont, /* complain_on_overflow */
1651 ppc_elf_unhandled_reloc, /* special_function */
1652 "R_PPC_VLE_SDAREL_HA16D", /* name */
1653 FALSE, /* partial_inplace */
1654 0, /* src_mask */
1655 0x1f07ff, /* dst_mask */
1656 FALSE), /* pcrel_offset */
1657
1658 HOWTO (R_PPC_IRELATIVE, /* type */
1659 0, /* rightshift */
1660 2, /* size (0 = byte, 1 = short, 2 = long) */
1661 32, /* bitsize */
1662 FALSE, /* pc_relative */
1663 0, /* bitpos */
1664 complain_overflow_dont, /* complain_on_overflow */
1665 ppc_elf_unhandled_reloc, /* special_function */
1666 "R_PPC_IRELATIVE", /* name */
1667 FALSE, /* partial_inplace */
1668 0, /* src_mask */
1669 0xffffffff, /* dst_mask */
1670 FALSE), /* pcrel_offset */
1671
1672 /* A 16 bit relative relocation. */
1673 HOWTO (R_PPC_REL16, /* type */
1674 0, /* rightshift */
1675 1, /* size (0 = byte, 1 = short, 2 = long) */
1676 16, /* bitsize */
1677 TRUE, /* pc_relative */
1678 0, /* bitpos */
1679 complain_overflow_signed, /* complain_on_overflow */
1680 bfd_elf_generic_reloc, /* special_function */
1681 "R_PPC_REL16", /* name */
1682 FALSE, /* partial_inplace */
1683 0, /* src_mask */
1684 0xffff, /* dst_mask */
1685 TRUE), /* pcrel_offset */
1686
1687 /* A 16 bit relative relocation without overflow. */
1688 HOWTO (R_PPC_REL16_LO, /* type */
1689 0, /* rightshift */
1690 1, /* size (0 = byte, 1 = short, 2 = long) */
1691 16, /* bitsize */
1692 TRUE, /* pc_relative */
1693 0, /* bitpos */
1694 complain_overflow_dont,/* complain_on_overflow */
1695 bfd_elf_generic_reloc, /* special_function */
1696 "R_PPC_REL16_LO", /* name */
1697 FALSE, /* partial_inplace */
1698 0, /* src_mask */
1699 0xffff, /* dst_mask */
1700 TRUE), /* pcrel_offset */
1701
1702 /* The high order 16 bits of a relative address. */
1703 HOWTO (R_PPC_REL16_HI, /* type */
1704 16, /* rightshift */
1705 1, /* size (0 = byte, 1 = short, 2 = long) */
1706 16, /* bitsize */
1707 TRUE, /* pc_relative */
1708 0, /* bitpos */
1709 complain_overflow_dont, /* complain_on_overflow */
1710 bfd_elf_generic_reloc, /* special_function */
1711 "R_PPC_REL16_HI", /* name */
1712 FALSE, /* partial_inplace */
1713 0, /* src_mask */
1714 0xffff, /* dst_mask */
1715 TRUE), /* pcrel_offset */
1716
1717 /* The high order 16 bits of a relative address, plus 1 if the contents of
1718 the low 16 bits, treated as a signed number, is negative. */
1719 HOWTO (R_PPC_REL16_HA, /* type */
1720 16, /* rightshift */
1721 1, /* size (0 = byte, 1 = short, 2 = long) */
1722 16, /* bitsize */
1723 TRUE, /* pc_relative */
1724 0, /* bitpos */
1725 complain_overflow_dont, /* complain_on_overflow */
1726 ppc_elf_addr16_ha_reloc, /* special_function */
1727 "R_PPC_REL16_HA", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 TRUE), /* pcrel_offset */
1732
1733 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1734 HOWTO (R_PPC_REL16DX_HA, /* type */
1735 16, /* rightshift */
1736 2, /* size (0 = byte, 1 = short, 2 = long) */
1737 16, /* bitsize */
1738 TRUE, /* pc_relative */
1739 0, /* bitpos */
1740 complain_overflow_signed, /* complain_on_overflow */
1741 ppc_elf_addr16_ha_reloc, /* special_function */
1742 "R_PPC_REL16DX_HA", /* name */
1743 FALSE, /* partial_inplace */
1744 0, /* src_mask */
1745 0x1fffc1, /* dst_mask */
1746 TRUE), /* pcrel_offset */
1747
1748 /* GNU extension to record C++ vtable hierarchy. */
1749 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1750 0, /* rightshift */
1751 0, /* size (0 = byte, 1 = short, 2 = long) */
1752 0, /* bitsize */
1753 FALSE, /* pc_relative */
1754 0, /* bitpos */
1755 complain_overflow_dont, /* complain_on_overflow */
1756 NULL, /* special_function */
1757 "R_PPC_GNU_VTINHERIT", /* name */
1758 FALSE, /* partial_inplace */
1759 0, /* src_mask */
1760 0, /* dst_mask */
1761 FALSE), /* pcrel_offset */
1762
1763 /* GNU extension to record C++ vtable member usage. */
1764 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1765 0, /* rightshift */
1766 0, /* size (0 = byte, 1 = short, 2 = long) */
1767 0, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_dont, /* complain_on_overflow */
1771 NULL, /* special_function */
1772 "R_PPC_GNU_VTENTRY", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Phony reloc to handle AIX style TOC entries. */
1779 HOWTO (R_PPC_TOC16, /* type */
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_signed, /* complain_on_overflow */
1786 ppc_elf_unhandled_reloc, /* special_function */
1787 "R_PPC_TOC16", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792 };
1793
1794 /* External 32-bit PPC structure for PRPSINFO. This structure is
1795 ABI-defined, thus we choose to use char arrays here in order to
1796 avoid dealing with different types in different architectures.
1797
1798 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1799 most non-PPC architectures use `short int'.
1800
1801 This structure will ultimately be written in the corefile's note
1802 section, as the PRPSINFO. */
1803
1804 struct elf_external_ppc_linux_prpsinfo32
1805 {
1806 char pr_state; /* Numeric process state. */
1807 char pr_sname; /* Char for pr_state. */
1808 char pr_zomb; /* Zombie. */
1809 char pr_nice; /* Nice val. */
1810 char pr_flag[4]; /* Flags. */
1811 char pr_uid[4];
1812 char pr_gid[4];
1813 char pr_pid[4];
1814 char pr_ppid[4];
1815 char pr_pgrp[4];
1816 char pr_sid[4];
1817 char pr_fname[16]; /* Filename of executable. */
1818 char pr_psargs[80]; /* Initial part of arg list. */
1819 };
1820
1821 /* Helper function to copy an elf_internal_linux_prpsinfo in host
1822 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */
1823
1824 static inline void
1825 swap_ppc_linux_prpsinfo32_out (bfd *obfd,
1826 const struct elf_internal_linux_prpsinfo *from,
1827 struct elf_external_ppc_linux_prpsinfo32 *to)
1828 {
1829 bfd_put_8 (obfd, from->pr_state, &to->pr_state);
1830 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname);
1831 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb);
1832 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice);
1833 bfd_put_32 (obfd, from->pr_flag, to->pr_flag);
1834 bfd_put_32 (obfd, from->pr_uid, to->pr_uid);
1835 bfd_put_32 (obfd, from->pr_gid, to->pr_gid);
1836 bfd_put_32 (obfd, from->pr_pid, to->pr_pid);
1837 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid);
1838 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp);
1839 bfd_put_32 (obfd, from->pr_sid, to->pr_sid);
1840 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname));
1841 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs));
1842 }
1843 \f
1844 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1845
1846 static void
1847 ppc_elf_howto_init (void)
1848 {
1849 unsigned int i, type;
1850
1851 for (i = 0;
1852 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1853 i++)
1854 {
1855 type = ppc_elf_howto_raw[i].type;
1856 if (type >= (sizeof (ppc_elf_howto_table)
1857 / sizeof (ppc_elf_howto_table[0])))
1858 abort ();
1859 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1860 }
1861 }
1862
1863 static reloc_howto_type *
1864 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1865 bfd_reloc_code_real_type code)
1866 {
1867 enum elf_ppc_reloc_type r;
1868
1869 /* Initialize howto table if not already done. */
1870 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1871 ppc_elf_howto_init ();
1872
1873 switch (code)
1874 {
1875 default:
1876 return NULL;
1877
1878 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1879 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1880 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1881 case BFD_RELOC_PPC64_ADDR16_DS:
1882 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1883 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1884 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1885 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1886 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1887 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1888 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1889 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1890 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1891 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1892 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1893 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1894 case BFD_RELOC_PPC64_GOT16_DS:
1895 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1896 case BFD_RELOC_PPC64_GOT16_LO_DS:
1897 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1898 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1899 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1900 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1901 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1902 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1903 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1904 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1905 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1906 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1907 case BFD_RELOC_PPC64_PLT16_LO_DS:
1908 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1909 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1910 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1911 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1912 case BFD_RELOC_PPC64_SECTOFF_DS:
1913 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1914 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1915 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1916 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1917 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1918 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1919 case BFD_RELOC_PPC64_TOC16_DS:
1920 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1921 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1922 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1923 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1924 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1925 case BFD_RELOC_PPC64_TPREL16_DS:
1926 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1927 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1928 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1929 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1930 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1931 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1932 case BFD_RELOC_PPC64_DTPREL16_DS:
1933 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1934 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1935 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1936 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1937 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1938 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1939 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1940 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1941 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1942 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1943 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1944 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1945 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1946 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1947 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1948 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1949 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1950 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1951 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1952 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1953 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1954 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1955 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1956 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1957 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1958 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1959 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1960 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1961 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1962 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1963 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1964 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1965 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1966 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1967 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1968 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1969 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1970 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1971 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1972 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1973 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1974 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1975 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1976 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1977 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1978 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1979 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1980 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1981 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1982 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1983 r = R_PPC_VLE_SDAREL_LO16A;
1984 break;
1985 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1986 r = R_PPC_VLE_SDAREL_LO16D;
1987 break;
1988 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1989 r = R_PPC_VLE_SDAREL_HI16A;
1990 break;
1991 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1992 r = R_PPC_VLE_SDAREL_HI16D;
1993 break;
1994 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1995 r = R_PPC_VLE_SDAREL_HA16A;
1996 break;
1997 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1998 r = R_PPC_VLE_SDAREL_HA16D;
1999 break;
2000 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2001 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2002 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2003 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2004 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2005 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2006 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2007 }
2008
2009 return ppc_elf_howto_table[r];
2010 };
2011
2012 static reloc_howto_type *
2013 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2014 const char *r_name)
2015 {
2016 unsigned int i;
2017
2018 for (i = 0;
2019 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2020 i++)
2021 if (ppc_elf_howto_raw[i].name != NULL
2022 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2023 return &ppc_elf_howto_raw[i];
2024
2025 return NULL;
2026 }
2027
2028 /* Set the howto pointer for a PowerPC ELF reloc. */
2029
2030 static void
2031 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2032 arelent *cache_ptr,
2033 Elf_Internal_Rela *dst)
2034 {
2035 unsigned int r_type;
2036
2037 /* Initialize howto table if not already done. */
2038 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2039 ppc_elf_howto_init ();
2040
2041 r_type = ELF32_R_TYPE (dst->r_info);
2042 if (r_type >= R_PPC_max)
2043 {
2044 (*_bfd_error_handler) (_("%B: unrecognised PPC reloc number: %d"),
2045 abfd, r_type);
2046 bfd_set_error (bfd_error_bad_value);
2047 r_type = R_PPC_NONE;
2048 }
2049 cache_ptr->howto = ppc_elf_howto_table[r_type];
2050
2051 /* Just because the above assert didn't trigger doesn't mean that
2052 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2053 if (!cache_ptr->howto)
2054 {
2055 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2056 abfd, r_type);
2057 bfd_set_error (bfd_error_bad_value);
2058
2059 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2060 }
2061 }
2062
2063 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2064
2065 static bfd_reloc_status_type
2066 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2067 arelent *reloc_entry,
2068 asymbol *symbol,
2069 void *data ATTRIBUTE_UNUSED,
2070 asection *input_section,
2071 bfd *output_bfd,
2072 char **error_message ATTRIBUTE_UNUSED)
2073 {
2074 enum elf_ppc_reloc_type r_type;
2075 long insn;
2076 bfd_size_type octets;
2077 bfd_vma value;
2078
2079 if (output_bfd != NULL)
2080 {
2081 reloc_entry->address += input_section->output_offset;
2082 return bfd_reloc_ok;
2083 }
2084
2085 reloc_entry->addend += 0x8000;
2086 r_type = reloc_entry->howto->type;
2087 if (r_type != R_PPC_REL16DX_HA)
2088 return bfd_reloc_continue;
2089
2090 value = 0;
2091 if (!bfd_is_com_section (symbol->section))
2092 value = symbol->value;
2093 value += (reloc_entry->addend
2094 + symbol->section->output_offset
2095 + symbol->section->output_section->vma);
2096 value -= (reloc_entry->address
2097 + input_section->output_offset
2098 + input_section->output_section->vma);
2099 value >>= 16;
2100
2101 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2102 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2103 insn &= ~0x1fffc1;
2104 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2105 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2106 return bfd_reloc_ok;
2107 }
2108
2109 static bfd_reloc_status_type
2110 ppc_elf_unhandled_reloc (bfd *abfd,
2111 arelent *reloc_entry,
2112 asymbol *symbol,
2113 void *data,
2114 asection *input_section,
2115 bfd *output_bfd,
2116 char **error_message)
2117 {
2118 /* If this is a relocatable link (output_bfd test tells us), just
2119 call the generic function. Any adjustment will be done at final
2120 link time. */
2121 if (output_bfd != NULL)
2122 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2123 input_section, output_bfd, error_message);
2124
2125 if (error_message != NULL)
2126 {
2127 static char buf[60];
2128 sprintf (buf, _("generic linker can't handle %s"),
2129 reloc_entry->howto->name);
2130 *error_message = buf;
2131 }
2132 return bfd_reloc_dangerous;
2133 }
2134 \f
2135 /* Sections created by the linker. */
2136
2137 typedef struct elf_linker_section
2138 {
2139 /* Pointer to the bfd section. */
2140 asection *section;
2141 /* Section name. */
2142 const char *name;
2143 /* Associated bss section name. */
2144 const char *bss_name;
2145 /* Associated symbol name. */
2146 const char *sym_name;
2147 /* Associated symbol. */
2148 struct elf_link_hash_entry *sym;
2149 } elf_linker_section_t;
2150
2151 /* Linked list of allocated pointer entries. This hangs off of the
2152 symbol lists, and provides allows us to return different pointers,
2153 based on different addend's. */
2154
2155 typedef struct elf_linker_section_pointers
2156 {
2157 /* next allocated pointer for this symbol */
2158 struct elf_linker_section_pointers *next;
2159 /* offset of pointer from beginning of section */
2160 bfd_vma offset;
2161 /* addend used */
2162 bfd_vma addend;
2163 /* which linker section this is */
2164 elf_linker_section_t *lsect;
2165 } elf_linker_section_pointers_t;
2166
2167 struct ppc_elf_obj_tdata
2168 {
2169 struct elf_obj_tdata elf;
2170
2171 /* A mapping from local symbols to offsets into the various linker
2172 sections added. This is index by the symbol index. */
2173 elf_linker_section_pointers_t **linker_section_pointers;
2174
2175 /* Flags used to auto-detect plt type. */
2176 unsigned int makes_plt_call : 1;
2177 unsigned int has_rel16 : 1;
2178 };
2179
2180 #define ppc_elf_tdata(bfd) \
2181 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2182
2183 #define elf_local_ptr_offsets(bfd) \
2184 (ppc_elf_tdata (bfd)->linker_section_pointers)
2185
2186 #define is_ppc_elf(bfd) \
2187 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2188 && elf_object_id (bfd) == PPC32_ELF_DATA)
2189
2190 /* Override the generic function because we store some extras. */
2191
2192 static bfd_boolean
2193 ppc_elf_mkobject (bfd *abfd)
2194 {
2195 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2196 PPC32_ELF_DATA);
2197 }
2198
2199 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2200
2201 bfd_boolean
2202 _bfd_elf_ppc_set_arch (bfd *abfd)
2203 {
2204 unsigned long mach = 0;
2205 asection *s;
2206 unsigned char *contents;
2207
2208 if (abfd->arch_info->bits_per_word == 32
2209 && bfd_big_endian (abfd))
2210 {
2211
2212 for (s = abfd->sections; s != NULL; s = s->next)
2213 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2214 break;
2215 if (s != NULL)
2216 mach = bfd_mach_ppc_vle;
2217 }
2218
2219 if (mach == 0)
2220 {
2221 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2222 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2223 {
2224 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2225 unsigned int i;
2226
2227 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2228 {
2229 unsigned int val = bfd_get_32 (abfd, contents + i);
2230 switch (val >> 16)
2231 {
2232 case PPC_APUINFO_PMR:
2233 case PPC_APUINFO_RFMCI:
2234 if (mach == 0)
2235 mach = bfd_mach_ppc_titan;
2236 break;
2237
2238 case PPC_APUINFO_ISEL:
2239 case PPC_APUINFO_CACHELCK:
2240 if (mach == bfd_mach_ppc_titan)
2241 mach = bfd_mach_ppc_e500mc;
2242 break;
2243
2244 case PPC_APUINFO_SPE:
2245 case PPC_APUINFO_EFS:
2246 case PPC_APUINFO_BRLOCK:
2247 if (mach != bfd_mach_ppc_vle)
2248 mach = bfd_mach_ppc_e500;
2249 break;
2250
2251 case PPC_APUINFO_VLE:
2252 mach = bfd_mach_ppc_vle;
2253 break;
2254
2255 default:
2256 mach = -1ul;
2257 }
2258 }
2259 free (contents);
2260 }
2261 }
2262
2263 if (mach != 0 && mach != -1ul)
2264 {
2265 const bfd_arch_info_type *arch;
2266
2267 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2268 if (arch->mach == mach)
2269 {
2270 abfd->arch_info = arch;
2271 break;
2272 }
2273 }
2274 return TRUE;
2275 }
2276
2277 /* Fix bad default arch selected for a 32 bit input bfd when the
2278 default is 64 bit. Also select arch based on apuinfo. */
2279
2280 static bfd_boolean
2281 ppc_elf_object_p (bfd *abfd)
2282 {
2283 if (!abfd->arch_info->the_default)
2284 return TRUE;
2285
2286 if (abfd->arch_info->bits_per_word == 64)
2287 {
2288 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2289
2290 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2291 {
2292 /* Relies on arch after 64 bit default being 32 bit default. */
2293 abfd->arch_info = abfd->arch_info->next;
2294 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2295 }
2296 }
2297 return _bfd_elf_ppc_set_arch (abfd);
2298 }
2299
2300 /* Function to set whether a module needs the -mrelocatable bit set. */
2301
2302 static bfd_boolean
2303 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2304 {
2305 BFD_ASSERT (!elf_flags_init (abfd)
2306 || elf_elfheader (abfd)->e_flags == flags);
2307
2308 elf_elfheader (abfd)->e_flags = flags;
2309 elf_flags_init (abfd) = TRUE;
2310 return TRUE;
2311 }
2312
2313 /* Support for core dump NOTE sections. */
2314
2315 static bfd_boolean
2316 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2317 {
2318 int offset;
2319 unsigned int size;
2320
2321 switch (note->descsz)
2322 {
2323 default:
2324 return FALSE;
2325
2326 case 268: /* Linux/PPC. */
2327 /* pr_cursig */
2328 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2329
2330 /* pr_pid */
2331 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2332
2333 /* pr_reg */
2334 offset = 72;
2335 size = 192;
2336
2337 break;
2338 }
2339
2340 /* Make a ".reg/999" section. */
2341 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2342 size, note->descpos + offset);
2343 }
2344
2345 static bfd_boolean
2346 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2347 {
2348 switch (note->descsz)
2349 {
2350 default:
2351 return FALSE;
2352
2353 case 128: /* Linux/PPC elf_prpsinfo. */
2354 elf_tdata (abfd)->core->pid
2355 = bfd_get_32 (abfd, note->descdata + 16);
2356 elf_tdata (abfd)->core->program
2357 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2358 elf_tdata (abfd)->core->command
2359 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2360 }
2361
2362 /* Note that for some reason, a spurious space is tacked
2363 onto the end of the args in some (at least one anyway)
2364 implementations, so strip it off if it exists. */
2365
2366 {
2367 char *command = elf_tdata (abfd)->core->command;
2368 int n = strlen (command);
2369
2370 if (0 < n && command[n - 1] == ' ')
2371 command[n - 1] = '\0';
2372 }
2373
2374 return TRUE;
2375 }
2376
2377 char *
2378 elfcore_write_ppc_linux_prpsinfo32
2379 (bfd *abfd,
2380 char *buf,
2381 int *bufsiz,
2382 const struct elf_internal_linux_prpsinfo *prpsinfo)
2383 {
2384 struct elf_external_ppc_linux_prpsinfo32 data;
2385
2386 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data);
2387 return elfcore_write_note (abfd, buf, bufsiz,
2388 "CORE", NT_PRPSINFO, &data, sizeof (data));
2389 }
2390
2391 static char *
2392 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2393 {
2394 switch (note_type)
2395 {
2396 default:
2397 return NULL;
2398
2399 case NT_PRPSINFO:
2400 {
2401 char data[128];
2402 va_list ap;
2403
2404 va_start (ap, note_type);
2405 memset (data, 0, sizeof (data));
2406 strncpy (data + 32, va_arg (ap, const char *), 16);
2407 strncpy (data + 48, va_arg (ap, const char *), 80);
2408 va_end (ap);
2409 return elfcore_write_note (abfd, buf, bufsiz,
2410 "CORE", note_type, data, sizeof (data));
2411 }
2412
2413 case NT_PRSTATUS:
2414 {
2415 char data[268];
2416 va_list ap;
2417 long pid;
2418 int cursig;
2419 const void *greg;
2420
2421 va_start (ap, note_type);
2422 memset (data, 0, 72);
2423 pid = va_arg (ap, long);
2424 bfd_put_32 (abfd, pid, data + 24);
2425 cursig = va_arg (ap, int);
2426 bfd_put_16 (abfd, cursig, data + 12);
2427 greg = va_arg (ap, const void *);
2428 memcpy (data + 72, greg, 192);
2429 memset (data + 264, 0, 4);
2430 va_end (ap);
2431 return elfcore_write_note (abfd, buf, bufsiz,
2432 "CORE", note_type, data, sizeof (data));
2433 }
2434 }
2435 }
2436
2437 static flagword
2438 ppc_elf_lookup_section_flags (char *flag_name)
2439 {
2440
2441 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2442 return SHF_PPC_VLE;
2443
2444 return 0;
2445 }
2446
2447 /* Add the VLE flag if required. */
2448
2449 bfd_boolean
2450 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2451 {
2452 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2453 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2454 shdr->sh_flags |= SHF_PPC_VLE;
2455
2456 return TRUE;
2457 }
2458
2459 /* Return address for Ith PLT stub in section PLT, for relocation REL
2460 or (bfd_vma) -1 if it should not be included. */
2461
2462 static bfd_vma
2463 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2464 const asection *plt ATTRIBUTE_UNUSED,
2465 const arelent *rel)
2466 {
2467 return rel->address;
2468 }
2469
2470 /* Handle a PowerPC specific section when reading an object file. This
2471 is called when bfd_section_from_shdr finds a section with an unknown
2472 type. */
2473
2474 static bfd_boolean
2475 ppc_elf_section_from_shdr (bfd *abfd,
2476 Elf_Internal_Shdr *hdr,
2477 const char *name,
2478 int shindex)
2479 {
2480 asection *newsect;
2481 flagword flags;
2482
2483 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2484 return FALSE;
2485
2486 newsect = hdr->bfd_section;
2487 flags = bfd_get_section_flags (abfd, newsect);
2488 if (hdr->sh_flags & SHF_EXCLUDE)
2489 flags |= SEC_EXCLUDE;
2490
2491 if (hdr->sh_type == SHT_ORDERED)
2492 flags |= SEC_SORT_ENTRIES;
2493
2494 bfd_set_section_flags (abfd, newsect, flags);
2495 return TRUE;
2496 }
2497
2498 /* Set up any other section flags and such that may be necessary. */
2499
2500 static bfd_boolean
2501 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2502 Elf_Internal_Shdr *shdr,
2503 asection *asect)
2504 {
2505 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2506 shdr->sh_type = SHT_ORDERED;
2507
2508 return TRUE;
2509 }
2510
2511 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2512 need to bump up the number of section headers. */
2513
2514 static int
2515 ppc_elf_additional_program_headers (bfd *abfd,
2516 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2517 {
2518 asection *s;
2519 int ret = 0;
2520
2521 s = bfd_get_section_by_name (abfd, ".sbss2");
2522 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2523 ++ret;
2524
2525 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2526 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2527 ++ret;
2528
2529 return ret;
2530 }
2531
2532 /* Modify the segment map for VLE executables. */
2533
2534 bfd_boolean
2535 ppc_elf_modify_segment_map (bfd *abfd,
2536 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2537 {
2538 struct elf_segment_map *m, *n;
2539 bfd_size_type amt;
2540 unsigned int j, k;
2541 bfd_boolean sect0_vle, sectj_vle;
2542
2543 /* At this point in the link, output sections have already been sorted by
2544 LMA and assigned to segments. All that is left to do is to ensure
2545 there is no mixing of VLE & non-VLE sections in a text segment.
2546 If we find that case, we split the segment.
2547 We maintain the original output section order. */
2548
2549 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2550 {
2551 if (m->count == 0)
2552 continue;
2553
2554 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2555 for (j = 1; j < m->count; ++j)
2556 {
2557 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2558
2559 if (sectj_vle != sect0_vle)
2560 break;
2561 }
2562 if (j >= m->count)
2563 continue;
2564
2565 /* sections 0..j-1 stay in this (current) segment,
2566 the remainder are put in a new segment.
2567 The scan resumes with the new segment. */
2568
2569 /* Fix the new segment. */
2570 amt = sizeof (struct elf_segment_map);
2571 amt += (m->count - j - 1) * sizeof (asection *);
2572 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2573 if (n == NULL)
2574 return FALSE;
2575
2576 n->p_type = PT_LOAD;
2577 n->p_flags = PF_X | PF_R;
2578 if (sectj_vle)
2579 n->p_flags |= PF_PPC_VLE;
2580 n->count = m->count - j;
2581 for (k = 0; k < n->count; ++k)
2582 {
2583 n->sections[k] = m->sections[j+k];
2584 m->sections[j+k] = NULL;
2585 }
2586 n->next = m->next;
2587 m->next = n;
2588
2589 /* Fix the current segment */
2590 m->count = j;
2591 }
2592
2593 return TRUE;
2594 }
2595
2596 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2597 .PPC.EMB.sbss0 a normal section, and not a bss section so
2598 that the linker doesn't crater when trying to make more than
2599 2 sections. */
2600
2601 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2602 {
2603 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2604 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2605 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2606 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2607 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2608 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2609 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2610 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2611 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2612 { NULL, 0, 0, 0, 0 }
2613 };
2614
2615 /* This is what we want for new plt/got. */
2616 static struct bfd_elf_special_section ppc_alt_plt =
2617 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2618
2619 static const struct bfd_elf_special_section *
2620 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2621 {
2622 const struct bfd_elf_special_section *ssect;
2623
2624 /* See if this is one of the special sections. */
2625 if (sec->name == NULL)
2626 return NULL;
2627
2628 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2629 sec->use_rela_p);
2630 if (ssect != NULL)
2631 {
2632 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2633 ssect = &ppc_alt_plt;
2634 return ssect;
2635 }
2636
2637 return _bfd_elf_get_sec_type_attr (abfd, sec);
2638 }
2639 \f
2640 /* Very simple linked list structure for recording apuinfo values. */
2641 typedef struct apuinfo_list
2642 {
2643 struct apuinfo_list *next;
2644 unsigned long value;
2645 }
2646 apuinfo_list;
2647
2648 static apuinfo_list *head;
2649 static bfd_boolean apuinfo_set;
2650
2651 static void
2652 apuinfo_list_init (void)
2653 {
2654 head = NULL;
2655 apuinfo_set = FALSE;
2656 }
2657
2658 static void
2659 apuinfo_list_add (unsigned long value)
2660 {
2661 apuinfo_list *entry = head;
2662
2663 while (entry != NULL)
2664 {
2665 if (entry->value == value)
2666 return;
2667 entry = entry->next;
2668 }
2669
2670 entry = bfd_malloc (sizeof (* entry));
2671 if (entry == NULL)
2672 return;
2673
2674 entry->value = value;
2675 entry->next = head;
2676 head = entry;
2677 }
2678
2679 static unsigned
2680 apuinfo_list_length (void)
2681 {
2682 apuinfo_list *entry;
2683 unsigned long count;
2684
2685 for (entry = head, count = 0;
2686 entry;
2687 entry = entry->next)
2688 ++ count;
2689
2690 return count;
2691 }
2692
2693 static inline unsigned long
2694 apuinfo_list_element (unsigned long number)
2695 {
2696 apuinfo_list * entry;
2697
2698 for (entry = head;
2699 entry && number --;
2700 entry = entry->next)
2701 ;
2702
2703 return entry ? entry->value : 0;
2704 }
2705
2706 static void
2707 apuinfo_list_finish (void)
2708 {
2709 apuinfo_list *entry;
2710
2711 for (entry = head; entry;)
2712 {
2713 apuinfo_list *next = entry->next;
2714 free (entry);
2715 entry = next;
2716 }
2717
2718 head = NULL;
2719 }
2720
2721 /* Scan the input BFDs and create a linked list of
2722 the APUinfo values that will need to be emitted. */
2723
2724 static void
2725 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2726 {
2727 bfd *ibfd;
2728 asection *asec;
2729 char *buffer = NULL;
2730 bfd_size_type largest_input_size = 0;
2731 unsigned i;
2732 unsigned long length;
2733 const char *error_message = NULL;
2734
2735 if (link_info == NULL)
2736 return;
2737
2738 apuinfo_list_init ();
2739
2740 /* Read in the input sections contents. */
2741 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2742 {
2743 unsigned long datum;
2744
2745 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2746 if (asec == NULL)
2747 continue;
2748
2749 error_message = _("corrupt %s section in %B");
2750 length = asec->size;
2751 if (length < 20)
2752 goto fail;
2753
2754 apuinfo_set = TRUE;
2755 if (largest_input_size < asec->size)
2756 {
2757 if (buffer)
2758 free (buffer);
2759 largest_input_size = asec->size;
2760 buffer = bfd_malloc (largest_input_size);
2761 if (!buffer)
2762 return;
2763 }
2764
2765 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2766 || (bfd_bread (buffer, length, ibfd) != length))
2767 {
2768 error_message = _("unable to read in %s section from %B");
2769 goto fail;
2770 }
2771
2772 /* Verify the contents of the header. Note - we have to
2773 extract the values this way in order to allow for a
2774 host whose endian-ness is different from the target. */
2775 datum = bfd_get_32 (ibfd, buffer);
2776 if (datum != sizeof APUINFO_LABEL)
2777 goto fail;
2778
2779 datum = bfd_get_32 (ibfd, buffer + 8);
2780 if (datum != 0x2)
2781 goto fail;
2782
2783 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2784 goto fail;
2785
2786 /* Get the number of bytes used for apuinfo entries. */
2787 datum = bfd_get_32 (ibfd, buffer + 4);
2788 if (datum + 20 != length)
2789 goto fail;
2790
2791 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2792 for (i = 0; i < datum; i += 4)
2793 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2794 }
2795
2796 error_message = NULL;
2797
2798 if (apuinfo_set)
2799 {
2800 /* Compute the size of the output section. */
2801 unsigned num_entries = apuinfo_list_length ();
2802
2803 /* Set the output section size, if it exists. */
2804 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2805
2806 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2807 {
2808 ibfd = abfd;
2809 error_message = _("warning: unable to set size of %s section in %B");
2810 }
2811 }
2812
2813 fail:
2814 if (buffer)
2815 free (buffer);
2816
2817 if (error_message)
2818 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2819 }
2820
2821 /* Prevent the output section from accumulating the input sections'
2822 contents. We have already stored this in our linked list structure. */
2823
2824 static bfd_boolean
2825 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2826 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2827 asection *asec,
2828 bfd_byte *contents ATTRIBUTE_UNUSED)
2829 {
2830 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2831 }
2832
2833 /* Finally we can generate the output section. */
2834
2835 static void
2836 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2837 {
2838 bfd_byte *buffer;
2839 asection *asec;
2840 unsigned i;
2841 unsigned num_entries;
2842 bfd_size_type length;
2843
2844 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2845 if (asec == NULL)
2846 return;
2847
2848 if (!apuinfo_set)
2849 return;
2850
2851 length = asec->size;
2852 if (length < 20)
2853 return;
2854
2855 buffer = bfd_malloc (length);
2856 if (buffer == NULL)
2857 {
2858 (*_bfd_error_handler)
2859 (_("failed to allocate space for new APUinfo section."));
2860 return;
2861 }
2862
2863 /* Create the apuinfo header. */
2864 num_entries = apuinfo_list_length ();
2865 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2866 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2867 bfd_put_32 (abfd, 0x2, buffer + 8);
2868 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2869
2870 length = 20;
2871 for (i = 0; i < num_entries; i++)
2872 {
2873 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2874 length += 4;
2875 }
2876
2877 if (length != asec->size)
2878 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2879
2880 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2881 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2882
2883 free (buffer);
2884
2885 apuinfo_list_finish ();
2886 }
2887 \f
2888 static bfd_boolean
2889 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2890 {
2891 bfd_byte buf[GLINK_ENTRY_SIZE];
2892
2893 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2894 return FALSE;
2895
2896 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2897 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2898 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2899 && bfd_get_32 (abfd, buf + 12) == BCTR);
2900 }
2901
2902 static bfd_boolean
2903 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2904 {
2905 bfd_vma vma = *(bfd_vma *) ptr;
2906 return ((section->flags & SEC_ALLOC) != 0
2907 && section->vma <= vma
2908 && vma < section->vma + section->size);
2909 }
2910
2911 static long
2912 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2913 long dynsymcount, asymbol **dynsyms,
2914 asymbol **ret)
2915 {
2916 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2917 asection *plt, *relplt, *dynamic, *glink;
2918 bfd_vma glink_vma = 0;
2919 bfd_vma resolv_vma = 0;
2920 bfd_vma stub_vma;
2921 asymbol *s;
2922 arelent *p;
2923 long count, i;
2924 size_t size;
2925 char *names;
2926 bfd_byte buf[4];
2927
2928 *ret = NULL;
2929
2930 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2931 return 0;
2932
2933 if (dynsymcount <= 0)
2934 return 0;
2935
2936 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2937 if (relplt == NULL)
2938 return 0;
2939
2940 plt = bfd_get_section_by_name (abfd, ".plt");
2941 if (plt == NULL)
2942 return 0;
2943
2944 /* Call common code to handle old-style executable PLTs. */
2945 if (elf_section_flags (plt) & SHF_EXECINSTR)
2946 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2947 dynsymcount, dynsyms, ret);
2948
2949 /* If this object was prelinked, the prelinker stored the address
2950 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2951 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2952 if (dynamic != NULL)
2953 {
2954 bfd_byte *dynbuf, *extdyn, *extdynend;
2955 size_t extdynsize;
2956 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2957
2958 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2959 return -1;
2960
2961 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2962 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2963
2964 extdyn = dynbuf;
2965 extdynend = extdyn + dynamic->size;
2966 for (; extdyn < extdynend; extdyn += extdynsize)
2967 {
2968 Elf_Internal_Dyn dyn;
2969 (*swap_dyn_in) (abfd, extdyn, &dyn);
2970
2971 if (dyn.d_tag == DT_NULL)
2972 break;
2973
2974 if (dyn.d_tag == DT_PPC_GOT)
2975 {
2976 unsigned int g_o_t = dyn.d_un.d_val;
2977 asection *got = bfd_get_section_by_name (abfd, ".got");
2978 if (got != NULL
2979 && bfd_get_section_contents (abfd, got, buf,
2980 g_o_t - got->vma + 4, 4))
2981 glink_vma = bfd_get_32 (abfd, buf);
2982 break;
2983 }
2984 }
2985 free (dynbuf);
2986 }
2987
2988 /* Otherwise we read the first plt entry. */
2989 if (glink_vma == 0)
2990 {
2991 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2992 glink_vma = bfd_get_32 (abfd, buf);
2993 }
2994
2995 if (glink_vma == 0)
2996 return 0;
2997
2998 /* The .glink section usually does not survive the final
2999 link; search for the section (usually .text) where the
3000 glink stubs now reside. */
3001 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3002 if (glink == NULL)
3003 return 0;
3004
3005 /* Determine glink PLT resolver by reading the relative branch
3006 from the first glink stub. */
3007 if (bfd_get_section_contents (abfd, glink, buf,
3008 glink_vma - glink->vma, 4))
3009 {
3010 unsigned int insn = bfd_get_32 (abfd, buf);
3011
3012 /* The first glink stub may either branch to the resolver ... */
3013 insn ^= B;
3014 if ((insn & ~0x3fffffc) == 0)
3015 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3016
3017 /* ... or fall through a bunch of NOPs. */
3018 else if ((insn ^ B ^ NOP) == 0)
3019 for (i = 4;
3020 bfd_get_section_contents (abfd, glink, buf,
3021 glink_vma - glink->vma + i, 4);
3022 i += 4)
3023 if (bfd_get_32 (abfd, buf) != NOP)
3024 {
3025 resolv_vma = glink_vma + i;
3026 break;
3027 }
3028 }
3029
3030 count = relplt->size / sizeof (Elf32_External_Rela);
3031 /* If the stubs are those for -shared/-pie then we might have
3032 multiple stubs for each plt entry. If that is the case then
3033 there is no way to associate stubs with their plt entries short
3034 of figuring out the GOT pointer value used in the stub. */
3035 if (!is_nonpic_glink_stub (abfd, glink,
3036 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3037 return 0;
3038
3039 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3040 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3041 return -1;
3042
3043 size = count * sizeof (asymbol);
3044 p = relplt->relocation;
3045 for (i = 0; i < count; i++, p++)
3046 {
3047 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3048 if (p->addend != 0)
3049 size += sizeof ("+0x") - 1 + 8;
3050 }
3051
3052 size += sizeof (asymbol) + sizeof ("__glink");
3053
3054 if (resolv_vma)
3055 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3056
3057 s = *ret = bfd_malloc (size);
3058 if (s == NULL)
3059 return -1;
3060
3061 stub_vma = glink_vma;
3062 names = (char *) (s + count + 1 + (resolv_vma != 0));
3063 p = relplt->relocation + count - 1;
3064 for (i = 0; i < count; i++)
3065 {
3066 size_t len;
3067
3068 *s = **p->sym_ptr_ptr;
3069 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3070 we are defining a symbol, ensure one of them is set. */
3071 if ((s->flags & BSF_LOCAL) == 0)
3072 s->flags |= BSF_GLOBAL;
3073 s->flags |= BSF_SYNTHETIC;
3074 s->section = glink;
3075 stub_vma -= 16;
3076 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3077 stub_vma -= 32;
3078 s->value = stub_vma - glink->vma;
3079 s->name = names;
3080 s->udata.p = NULL;
3081 len = strlen ((*p->sym_ptr_ptr)->name);
3082 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3083 names += len;
3084 if (p->addend != 0)
3085 {
3086 memcpy (names, "+0x", sizeof ("+0x") - 1);
3087 names += sizeof ("+0x") - 1;
3088 bfd_sprintf_vma (abfd, names, p->addend);
3089 names += strlen (names);
3090 }
3091 memcpy (names, "@plt", sizeof ("@plt"));
3092 names += sizeof ("@plt");
3093 ++s;
3094 --p;
3095 }
3096
3097 /* Add a symbol at the start of the glink branch table. */
3098 memset (s, 0, sizeof *s);
3099 s->the_bfd = abfd;
3100 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3101 s->section = glink;
3102 s->value = glink_vma - glink->vma;
3103 s->name = names;
3104 memcpy (names, "__glink", sizeof ("__glink"));
3105 names += sizeof ("__glink");
3106 s++;
3107 count++;
3108
3109 if (resolv_vma)
3110 {
3111 /* Add a symbol for the glink PLT resolver. */
3112 memset (s, 0, sizeof *s);
3113 s->the_bfd = abfd;
3114 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3115 s->section = glink;
3116 s->value = resolv_vma - glink->vma;
3117 s->name = names;
3118 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3119 names += sizeof ("__glink_PLTresolve");
3120 s++;
3121 count++;
3122 }
3123
3124 return count;
3125 }
3126 \f
3127 /* The following functions are specific to the ELF linker, while
3128 functions above are used generally. They appear in this file more
3129 or less in the order in which they are called. eg.
3130 ppc_elf_check_relocs is called early in the link process,
3131 ppc_elf_finish_dynamic_sections is one of the last functions
3132 called. */
3133
3134 /* Track PLT entries needed for a given symbol. We might need more
3135 than one glink entry per symbol when generating a pic binary. */
3136 struct plt_entry
3137 {
3138 struct plt_entry *next;
3139
3140 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3141 This field stores the offset into .got2 used to initialise the
3142 GOT pointer reg. It will always be at least 32768. (Current
3143 gcc always uses an offset of 32768, but ld -r will pack .got2
3144 sections together resulting in larger offsets). */
3145 bfd_vma addend;
3146
3147 /* The .got2 section. */
3148 asection *sec;
3149
3150 /* PLT refcount or offset. */
3151 union
3152 {
3153 bfd_signed_vma refcount;
3154 bfd_vma offset;
3155 } plt;
3156
3157 /* .glink stub offset. */
3158 bfd_vma glink_offset;
3159 };
3160
3161 /* Of those relocs that might be copied as dynamic relocs, this function
3162 selects those that must be copied when linking a shared library,
3163 even when the symbol is local. */
3164
3165 static int
3166 must_be_dyn_reloc (struct bfd_link_info *info,
3167 enum elf_ppc_reloc_type r_type)
3168 {
3169 switch (r_type)
3170 {
3171 default:
3172 return 1;
3173
3174 case R_PPC_REL24:
3175 case R_PPC_REL14:
3176 case R_PPC_REL14_BRTAKEN:
3177 case R_PPC_REL14_BRNTAKEN:
3178 case R_PPC_REL32:
3179 return 0;
3180
3181 case R_PPC_TPREL32:
3182 case R_PPC_TPREL16:
3183 case R_PPC_TPREL16_LO:
3184 case R_PPC_TPREL16_HI:
3185 case R_PPC_TPREL16_HA:
3186 return !bfd_link_executable (info);
3187 }
3188 }
3189
3190 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3191 copying dynamic variables from a shared lib into an app's dynbss
3192 section, and instead use a dynamic relocation to point into the
3193 shared lib. */
3194 #define ELIMINATE_COPY_RELOCS 1
3195
3196 /* Used to track dynamic relocations for local symbols. */
3197 struct ppc_dyn_relocs
3198 {
3199 struct ppc_dyn_relocs *next;
3200
3201 /* The input section of the reloc. */
3202 asection *sec;
3203
3204 /* Total number of relocs copied for the input section. */
3205 unsigned int count : 31;
3206
3207 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3208 unsigned int ifunc : 1;
3209 };
3210
3211 /* PPC ELF linker hash entry. */
3212
3213 struct ppc_elf_link_hash_entry
3214 {
3215 struct elf_link_hash_entry elf;
3216
3217 /* If this symbol is used in the linker created sections, the processor
3218 specific backend uses this field to map the field into the offset
3219 from the beginning of the section. */
3220 elf_linker_section_pointers_t *linker_section_pointer;
3221
3222 /* Track dynamic relocs copied for this symbol. */
3223 struct elf_dyn_relocs *dyn_relocs;
3224
3225 /* Contexts in which symbol is used in the GOT (or TOC).
3226 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3227 corresponding relocs are encountered during check_relocs.
3228 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3229 indicate the corresponding GOT entry type is not needed. */
3230 #define TLS_GD 1 /* GD reloc. */
3231 #define TLS_LD 2 /* LD reloc. */
3232 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3233 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3234 #define TLS_TLS 16 /* Any TLS reloc. */
3235 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3236 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3237 char tls_mask;
3238
3239 /* Nonzero if we have seen a small data relocation referring to this
3240 symbol. */
3241 unsigned char has_sda_refs : 1;
3242
3243 /* Flag use of given relocations. */
3244 unsigned char has_addr16_ha : 1;
3245 unsigned char has_addr16_lo : 1;
3246 };
3247
3248 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3249
3250 /* PPC ELF linker hash table. */
3251
3252 struct ppc_elf_link_hash_table
3253 {
3254 struct elf_link_hash_table elf;
3255
3256 /* Various options passed from the linker. */
3257 struct ppc_elf_params *params;
3258
3259 /* Short-cuts to get to dynamic linker sections. */
3260 asection *got;
3261 asection *relgot;
3262 asection *glink;
3263 asection *plt;
3264 asection *relplt;
3265 asection *iplt;
3266 asection *reliplt;
3267 asection *dynbss;
3268 asection *relbss;
3269 asection *dynsbss;
3270 asection *relsbss;
3271 elf_linker_section_t sdata[2];
3272 asection *sbss;
3273 asection *glink_eh_frame;
3274
3275 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3276 asection *srelplt2;
3277
3278 /* The .got.plt section (VxWorks only)*/
3279 asection *sgotplt;
3280
3281 /* Shortcut to __tls_get_addr. */
3282 struct elf_link_hash_entry *tls_get_addr;
3283
3284 /* The bfd that forced an old-style PLT. */
3285 bfd *old_bfd;
3286
3287 /* TLS local dynamic got entry handling. */
3288 union {
3289 bfd_signed_vma refcount;
3290 bfd_vma offset;
3291 } tlsld_got;
3292
3293 /* Offset of branch table to PltResolve function in glink. */
3294 bfd_vma glink_pltresolve;
3295
3296 /* Size of reserved GOT entries. */
3297 unsigned int got_header_size;
3298 /* Non-zero if allocating the header left a gap. */
3299 unsigned int got_gap;
3300
3301 /* The type of PLT we have chosen to use. */
3302 enum ppc_elf_plt_type plt_type;
3303
3304 /* True if the target system is VxWorks. */
3305 unsigned int is_vxworks:1;
3306
3307 /* The size of PLT entries. */
3308 int plt_entry_size;
3309 /* The distance between adjacent PLT slots. */
3310 int plt_slot_size;
3311 /* The size of the first PLT entry. */
3312 int plt_initial_entry_size;
3313
3314 /* Small local sym cache. */
3315 struct sym_cache sym_cache;
3316 };
3317
3318 /* Rename some of the generic section flags to better document how they
3319 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3320
3321 /* Nonzero if this section has TLS related relocations. */
3322 #define has_tls_reloc sec_flg0
3323
3324 /* Nonzero if this section has a call to __tls_get_addr. */
3325 #define has_tls_get_addr_call sec_flg1
3326
3327 /* Get the PPC ELF linker hash table from a link_info structure. */
3328
3329 #define ppc_elf_hash_table(p) \
3330 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3331 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3332
3333 /* Create an entry in a PPC ELF linker hash table. */
3334
3335 static struct bfd_hash_entry *
3336 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3337 struct bfd_hash_table *table,
3338 const char *string)
3339 {
3340 /* Allocate the structure if it has not already been allocated by a
3341 subclass. */
3342 if (entry == NULL)
3343 {
3344 entry = bfd_hash_allocate (table,
3345 sizeof (struct ppc_elf_link_hash_entry));
3346 if (entry == NULL)
3347 return entry;
3348 }
3349
3350 /* Call the allocation method of the superclass. */
3351 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3352 if (entry != NULL)
3353 {
3354 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3355 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3356 ppc_elf_hash_entry (entry)->tls_mask = 0;
3357 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3358 }
3359
3360 return entry;
3361 }
3362
3363 /* Create a PPC ELF linker hash table. */
3364
3365 static struct bfd_link_hash_table *
3366 ppc_elf_link_hash_table_create (bfd *abfd)
3367 {
3368 struct ppc_elf_link_hash_table *ret;
3369 static struct ppc_elf_params default_params
3370 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0 };
3371
3372 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3373 if (ret == NULL)
3374 return NULL;
3375
3376 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3377 ppc_elf_link_hash_newfunc,
3378 sizeof (struct ppc_elf_link_hash_entry),
3379 PPC32_ELF_DATA))
3380 {
3381 free (ret);
3382 return NULL;
3383 }
3384
3385 ret->elf.init_plt_refcount.refcount = 0;
3386 ret->elf.init_plt_refcount.glist = NULL;
3387 ret->elf.init_plt_offset.offset = 0;
3388 ret->elf.init_plt_offset.glist = NULL;
3389
3390 ret->params = &default_params;
3391
3392 ret->sdata[0].name = ".sdata";
3393 ret->sdata[0].sym_name = "_SDA_BASE_";
3394 ret->sdata[0].bss_name = ".sbss";
3395
3396 ret->sdata[1].name = ".sdata2";
3397 ret->sdata[1].sym_name = "_SDA2_BASE_";
3398 ret->sdata[1].bss_name = ".sbss2";
3399
3400 ret->plt_entry_size = 12;
3401 ret->plt_slot_size = 8;
3402 ret->plt_initial_entry_size = 72;
3403
3404 return &ret->elf.root;
3405 }
3406
3407 /* Hook linker params into hash table. */
3408
3409 void
3410 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3411 {
3412 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3413
3414 if (htab)
3415 htab->params = params;
3416 params->pagesize_p2 = bfd_log2 (params->pagesize);
3417 }
3418
3419 /* Create .got and the related sections. */
3420
3421 static bfd_boolean
3422 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3423 {
3424 struct ppc_elf_link_hash_table *htab;
3425 asection *s;
3426 flagword flags;
3427
3428 if (!_bfd_elf_create_got_section (abfd, info))
3429 return FALSE;
3430
3431 htab = ppc_elf_hash_table (info);
3432 htab->got = s = bfd_get_linker_section (abfd, ".got");
3433 if (s == NULL)
3434 abort ();
3435
3436 if (htab->is_vxworks)
3437 {
3438 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3439 if (!htab->sgotplt)
3440 abort ();
3441 }
3442 else
3443 {
3444 /* The powerpc .got has a blrl instruction in it. Mark it
3445 executable. */
3446 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3447 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3448 if (!bfd_set_section_flags (abfd, s, flags))
3449 return FALSE;
3450 }
3451
3452 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3453 if (!htab->relgot)
3454 abort ();
3455
3456 return TRUE;
3457 }
3458
3459 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3460 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3461 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3462
3463 static bfd_boolean
3464 ppc_elf_create_linker_section (bfd *abfd,
3465 struct bfd_link_info *info,
3466 flagword flags,
3467 elf_linker_section_t *lsect)
3468 {
3469 asection *s;
3470
3471 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3472 | SEC_LINKER_CREATED);
3473
3474 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3475 if (s == NULL)
3476 return FALSE;
3477 lsect->section = s;
3478
3479 /* Define the sym on the first section of this name. */
3480 s = bfd_get_section_by_name (abfd, lsect->name);
3481
3482 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3483 if (lsect->sym == NULL)
3484 return FALSE;
3485 lsect->sym->root.u.def.value = 0x8000;
3486 return TRUE;
3487 }
3488
3489 static bfd_boolean
3490 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3491 {
3492 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3493 asection *s;
3494 flagword flags;
3495
3496 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3497 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3498 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3499 htab->glink = s;
3500 if (s == NULL
3501 || !bfd_set_section_alignment (abfd, s,
3502 htab->params->ppc476_workaround ? 6 : 4))
3503 return FALSE;
3504
3505 if (!info->no_ld_generated_unwind_info)
3506 {
3507 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3508 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3509 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3510 htab->glink_eh_frame = s;
3511 if (s == NULL
3512 || !bfd_set_section_alignment (abfd, s, 2))
3513 return FALSE;
3514 }
3515
3516 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3517 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3518 htab->iplt = s;
3519 if (s == NULL
3520 || !bfd_set_section_alignment (abfd, s, 4))
3521 return FALSE;
3522
3523 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3524 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3525 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3526 htab->reliplt = s;
3527 if (s == NULL
3528 || ! bfd_set_section_alignment (abfd, s, 2))
3529 return FALSE;
3530
3531 if (!ppc_elf_create_linker_section (abfd, info, 0,
3532 &htab->sdata[0]))
3533 return FALSE;
3534
3535 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3536 &htab->sdata[1]))
3537 return FALSE;
3538
3539 return TRUE;
3540 }
3541
3542 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3543 to output sections (just like _bfd_elf_create_dynamic_sections has
3544 to create .dynbss and .rela.bss). */
3545
3546 static bfd_boolean
3547 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3548 {
3549 struct ppc_elf_link_hash_table *htab;
3550 asection *s;
3551 flagword flags;
3552
3553 htab = ppc_elf_hash_table (info);
3554
3555 if (htab->got == NULL
3556 && !ppc_elf_create_got (abfd, info))
3557 return FALSE;
3558
3559 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3560 return FALSE;
3561
3562 if (htab->glink == NULL
3563 && !ppc_elf_create_glink (abfd, info))
3564 return FALSE;
3565
3566 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3567 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3568 SEC_ALLOC | SEC_LINKER_CREATED);
3569 htab->dynsbss = s;
3570 if (s == NULL)
3571 return FALSE;
3572
3573 if (! bfd_link_pic (info))
3574 {
3575 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3576 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3577 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3578 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3579 htab->relsbss = s;
3580 if (s == NULL
3581 || ! bfd_set_section_alignment (abfd, s, 2))
3582 return FALSE;
3583 }
3584
3585 if (htab->is_vxworks
3586 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3587 return FALSE;
3588
3589 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3590 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3591 if (s == NULL)
3592 abort ();
3593
3594 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3595 if (htab->plt_type == PLT_VXWORKS)
3596 /* The VxWorks PLT is a loaded section with contents. */
3597 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3598 return bfd_set_section_flags (abfd, s, flags);
3599 }
3600
3601 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3602
3603 static void
3604 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3605 struct elf_link_hash_entry *dir,
3606 struct elf_link_hash_entry *ind)
3607 {
3608 struct ppc_elf_link_hash_entry *edir, *eind;
3609
3610 edir = (struct ppc_elf_link_hash_entry *) dir;
3611 eind = (struct ppc_elf_link_hash_entry *) ind;
3612
3613 edir->tls_mask |= eind->tls_mask;
3614 edir->has_sda_refs |= eind->has_sda_refs;
3615
3616 /* If called to transfer flags for a weakdef during processing
3617 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3618 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3619 if (!(ELIMINATE_COPY_RELOCS
3620 && eind->elf.root.type != bfd_link_hash_indirect
3621 && edir->elf.dynamic_adjusted))
3622 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3623
3624 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3625 edir->elf.ref_regular |= eind->elf.ref_regular;
3626 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3627 edir->elf.needs_plt |= eind->elf.needs_plt;
3628 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3629
3630 if (eind->dyn_relocs != NULL)
3631 {
3632 if (edir->dyn_relocs != NULL)
3633 {
3634 struct elf_dyn_relocs **pp;
3635 struct elf_dyn_relocs *p;
3636
3637 /* Add reloc counts against the indirect sym to the direct sym
3638 list. Merge any entries against the same section. */
3639 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3640 {
3641 struct elf_dyn_relocs *q;
3642
3643 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3644 if (q->sec == p->sec)
3645 {
3646 q->pc_count += p->pc_count;
3647 q->count += p->count;
3648 *pp = p->next;
3649 break;
3650 }
3651 if (q == NULL)
3652 pp = &p->next;
3653 }
3654 *pp = edir->dyn_relocs;
3655 }
3656
3657 edir->dyn_relocs = eind->dyn_relocs;
3658 eind->dyn_relocs = NULL;
3659 }
3660
3661 /* If we were called to copy over info for a weak sym, that's all.
3662 You might think dyn_relocs need not be copied over; After all,
3663 both syms will be dynamic or both non-dynamic so we're just
3664 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3665 code in ppc_elf_adjust_dynamic_symbol needs to check for
3666 dyn_relocs in read-only sections, and it does so on what is the
3667 DIR sym here. */
3668 if (eind->elf.root.type != bfd_link_hash_indirect)
3669 return;
3670
3671 /* Copy over the GOT refcount entries that we may have already seen to
3672 the symbol which just became indirect. */
3673 edir->elf.got.refcount += eind->elf.got.refcount;
3674 eind->elf.got.refcount = 0;
3675
3676 /* And plt entries. */
3677 if (eind->elf.plt.plist != NULL)
3678 {
3679 if (edir->elf.plt.plist != NULL)
3680 {
3681 struct plt_entry **entp;
3682 struct plt_entry *ent;
3683
3684 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3685 {
3686 struct plt_entry *dent;
3687
3688 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3689 if (dent->sec == ent->sec && dent->addend == ent->addend)
3690 {
3691 dent->plt.refcount += ent->plt.refcount;
3692 *entp = ent->next;
3693 break;
3694 }
3695 if (dent == NULL)
3696 entp = &ent->next;
3697 }
3698 *entp = edir->elf.plt.plist;
3699 }
3700
3701 edir->elf.plt.plist = eind->elf.plt.plist;
3702 eind->elf.plt.plist = NULL;
3703 }
3704
3705 if (eind->elf.dynindx != -1)
3706 {
3707 if (edir->elf.dynindx != -1)
3708 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3709 edir->elf.dynstr_index);
3710 edir->elf.dynindx = eind->elf.dynindx;
3711 edir->elf.dynstr_index = eind->elf.dynstr_index;
3712 eind->elf.dynindx = -1;
3713 eind->elf.dynstr_index = 0;
3714 }
3715 }
3716
3717 /* Hook called by the linker routine which adds symbols from an object
3718 file. We use it to put .comm items in .sbss, and not .bss. */
3719
3720 static bfd_boolean
3721 ppc_elf_add_symbol_hook (bfd *abfd,
3722 struct bfd_link_info *info,
3723 Elf_Internal_Sym *sym,
3724 const char **namep ATTRIBUTE_UNUSED,
3725 flagword *flagsp ATTRIBUTE_UNUSED,
3726 asection **secp,
3727 bfd_vma *valp)
3728 {
3729 if (sym->st_shndx == SHN_COMMON
3730 && !bfd_link_relocatable (info)
3731 && is_ppc_elf (info->output_bfd)
3732 && sym->st_size <= elf_gp_size (abfd))
3733 {
3734 /* Common symbols less than or equal to -G nn bytes are automatically
3735 put into .sbss. */
3736 struct ppc_elf_link_hash_table *htab;
3737
3738 htab = ppc_elf_hash_table (info);
3739 if (htab->sbss == NULL)
3740 {
3741 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3742
3743 if (!htab->elf.dynobj)
3744 htab->elf.dynobj = abfd;
3745
3746 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3747 ".sbss",
3748 flags);
3749 if (htab->sbss == NULL)
3750 return FALSE;
3751 }
3752
3753 *secp = htab->sbss;
3754 *valp = sym->st_size;
3755 }
3756
3757 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3758 && (abfd->flags & DYNAMIC) == 0
3759 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3760 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3761
3762 return TRUE;
3763 }
3764 \f
3765 /* Find a linker generated pointer with a given addend and type. */
3766
3767 static elf_linker_section_pointers_t *
3768 elf_find_pointer_linker_section
3769 (elf_linker_section_pointers_t *linker_pointers,
3770 bfd_vma addend,
3771 elf_linker_section_t *lsect)
3772 {
3773 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3774 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3775 return linker_pointers;
3776
3777 return NULL;
3778 }
3779
3780 /* Allocate a pointer to live in a linker created section. */
3781
3782 static bfd_boolean
3783 elf_allocate_pointer_linker_section (bfd *abfd,
3784 elf_linker_section_t *lsect,
3785 struct elf_link_hash_entry *h,
3786 const Elf_Internal_Rela *rel)
3787 {
3788 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3789 elf_linker_section_pointers_t *linker_section_ptr;
3790 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3791 bfd_size_type amt;
3792
3793 BFD_ASSERT (lsect != NULL);
3794
3795 /* Is this a global symbol? */
3796 if (h != NULL)
3797 {
3798 struct ppc_elf_link_hash_entry *eh;
3799
3800 /* Has this symbol already been allocated? If so, our work is done. */
3801 eh = (struct ppc_elf_link_hash_entry *) h;
3802 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3803 rel->r_addend,
3804 lsect))
3805 return TRUE;
3806
3807 ptr_linker_section_ptr = &eh->linker_section_pointer;
3808 }
3809 else
3810 {
3811 BFD_ASSERT (is_ppc_elf (abfd));
3812
3813 /* Allocation of a pointer to a local symbol. */
3814 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3815
3816 /* Allocate a table to hold the local symbols if first time. */
3817 if (!ptr)
3818 {
3819 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3820
3821 amt = num_symbols;
3822 amt *= sizeof (elf_linker_section_pointers_t *);
3823 ptr = bfd_zalloc (abfd, amt);
3824
3825 if (!ptr)
3826 return FALSE;
3827
3828 elf_local_ptr_offsets (abfd) = ptr;
3829 }
3830
3831 /* Has this symbol already been allocated? If so, our work is done. */
3832 if (elf_find_pointer_linker_section (ptr[r_symndx],
3833 rel->r_addend,
3834 lsect))
3835 return TRUE;
3836
3837 ptr_linker_section_ptr = &ptr[r_symndx];
3838 }
3839
3840 /* Allocate space for a pointer in the linker section, and allocate
3841 a new pointer record from internal memory. */
3842 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3843 amt = sizeof (elf_linker_section_pointers_t);
3844 linker_section_ptr = bfd_alloc (abfd, amt);
3845
3846 if (!linker_section_ptr)
3847 return FALSE;
3848
3849 linker_section_ptr->next = *ptr_linker_section_ptr;
3850 linker_section_ptr->addend = rel->r_addend;
3851 linker_section_ptr->lsect = lsect;
3852 *ptr_linker_section_ptr = linker_section_ptr;
3853
3854 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3855 return FALSE;
3856 linker_section_ptr->offset = lsect->section->size;
3857 lsect->section->size += 4;
3858
3859 #ifdef DEBUG
3860 fprintf (stderr,
3861 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3862 lsect->name, (long) linker_section_ptr->offset,
3863 (long) lsect->section->size);
3864 #endif
3865
3866 return TRUE;
3867 }
3868
3869 static struct plt_entry **
3870 update_local_sym_info (bfd *abfd,
3871 Elf_Internal_Shdr *symtab_hdr,
3872 unsigned long r_symndx,
3873 int tls_type)
3874 {
3875 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3876 struct plt_entry **local_plt;
3877 char *local_got_tls_masks;
3878
3879 if (local_got_refcounts == NULL)
3880 {
3881 bfd_size_type size = symtab_hdr->sh_info;
3882
3883 size *= (sizeof (*local_got_refcounts)
3884 + sizeof (*local_plt)
3885 + sizeof (*local_got_tls_masks));
3886 local_got_refcounts = bfd_zalloc (abfd, size);
3887 if (local_got_refcounts == NULL)
3888 return NULL;
3889 elf_local_got_refcounts (abfd) = local_got_refcounts;
3890 }
3891
3892 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3893 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3894 local_got_tls_masks[r_symndx] |= tls_type;
3895 if (tls_type != PLT_IFUNC)
3896 local_got_refcounts[r_symndx] += 1;
3897 return local_plt + r_symndx;
3898 }
3899
3900 static bfd_boolean
3901 update_plt_info (bfd *abfd, struct plt_entry **plist,
3902 asection *sec, bfd_vma addend)
3903 {
3904 struct plt_entry *ent;
3905
3906 if (addend < 32768)
3907 sec = NULL;
3908 for (ent = *plist; ent != NULL; ent = ent->next)
3909 if (ent->sec == sec && ent->addend == addend)
3910 break;
3911 if (ent == NULL)
3912 {
3913 bfd_size_type amt = sizeof (*ent);
3914 ent = bfd_alloc (abfd, amt);
3915 if (ent == NULL)
3916 return FALSE;
3917 ent->next = *plist;
3918 ent->sec = sec;
3919 ent->addend = addend;
3920 ent->plt.refcount = 0;
3921 *plist = ent;
3922 }
3923 ent->plt.refcount += 1;
3924 return TRUE;
3925 }
3926
3927 static struct plt_entry *
3928 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3929 {
3930 struct plt_entry *ent;
3931
3932 if (addend < 32768)
3933 sec = NULL;
3934 for (ent = *plist; ent != NULL; ent = ent->next)
3935 if (ent->sec == sec && ent->addend == addend)
3936 break;
3937 return ent;
3938 }
3939
3940 static bfd_boolean
3941 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3942 {
3943 return (r_type == R_PPC_PLTREL24
3944 || r_type == R_PPC_LOCAL24PC
3945 || r_type == R_PPC_REL24
3946 || r_type == R_PPC_REL14
3947 || r_type == R_PPC_REL14_BRTAKEN
3948 || r_type == R_PPC_REL14_BRNTAKEN
3949 || r_type == R_PPC_ADDR24
3950 || r_type == R_PPC_ADDR14
3951 || r_type == R_PPC_ADDR14_BRTAKEN
3952 || r_type == R_PPC_ADDR14_BRNTAKEN
3953 || r_type == R_PPC_VLE_REL24);
3954 }
3955
3956 static void
3957 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3958 {
3959 (*_bfd_error_handler)
3960 (_("%B: relocation %s cannot be used when making a shared object"),
3961 abfd,
3962 ppc_elf_howto_table[r_type]->name);
3963 bfd_set_error (bfd_error_bad_value);
3964 }
3965
3966 /* Look through the relocs for a section during the first phase, and
3967 allocate space in the global offset table or procedure linkage
3968 table. */
3969
3970 static bfd_boolean
3971 ppc_elf_check_relocs (bfd *abfd,
3972 struct bfd_link_info *info,
3973 asection *sec,
3974 const Elf_Internal_Rela *relocs)
3975 {
3976 struct ppc_elf_link_hash_table *htab;
3977 Elf_Internal_Shdr *symtab_hdr;
3978 struct elf_link_hash_entry **sym_hashes;
3979 const Elf_Internal_Rela *rel;
3980 const Elf_Internal_Rela *rel_end;
3981 asection *got2, *sreloc;
3982 struct elf_link_hash_entry *tga;
3983
3984 if (bfd_link_relocatable (info))
3985 return TRUE;
3986
3987 /* Don't do anything special with non-loaded, non-alloced sections.
3988 In particular, any relocs in such sections should not affect GOT
3989 and PLT reference counting (ie. we don't allow them to create GOT
3990 or PLT entries), there's no possibility or desire to optimize TLS
3991 relocs, and there's not much point in propagating relocs to shared
3992 libs that the dynamic linker won't relocate. */
3993 if ((sec->flags & SEC_ALLOC) == 0)
3994 return TRUE;
3995
3996 #ifdef DEBUG
3997 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3998 sec, abfd);
3999 #endif
4000
4001 BFD_ASSERT (is_ppc_elf (abfd));
4002
4003 /* Initialize howto table if not already done. */
4004 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4005 ppc_elf_howto_init ();
4006
4007 htab = ppc_elf_hash_table (info);
4008 if (htab->glink == NULL)
4009 {
4010 if (htab->elf.dynobj == NULL)
4011 htab->elf.dynobj = abfd;
4012 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4013 return FALSE;
4014 }
4015 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4016 FALSE, FALSE, TRUE);
4017 symtab_hdr = &elf_symtab_hdr (abfd);
4018 sym_hashes = elf_sym_hashes (abfd);
4019 got2 = bfd_get_section_by_name (abfd, ".got2");
4020 sreloc = NULL;
4021
4022 rel_end = relocs + sec->reloc_count;
4023 for (rel = relocs; rel < rel_end; rel++)
4024 {
4025 unsigned long r_symndx;
4026 enum elf_ppc_reloc_type r_type;
4027 struct elf_link_hash_entry *h;
4028 int tls_type;
4029 struct plt_entry **ifunc;
4030
4031 r_symndx = ELF32_R_SYM (rel->r_info);
4032 if (r_symndx < symtab_hdr->sh_info)
4033 h = NULL;
4034 else
4035 {
4036 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4037 while (h->root.type == bfd_link_hash_indirect
4038 || h->root.type == bfd_link_hash_warning)
4039 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4040
4041 /* PR15323, ref flags aren't set for references in the same
4042 object. */
4043 h->root.non_ir_ref = 1;
4044 }
4045
4046 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4047 This shows up in particular in an R_PPC_ADDR32 in the eabi
4048 startup code. */
4049 if (h != NULL
4050 && htab->got == NULL
4051 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4052 {
4053 if (htab->elf.dynobj == NULL)
4054 htab->elf.dynobj = abfd;
4055 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4056 return FALSE;
4057 BFD_ASSERT (h == htab->elf.hgot);
4058 }
4059
4060 tls_type = 0;
4061 r_type = ELF32_R_TYPE (rel->r_info);
4062 ifunc = NULL;
4063 if (h == NULL && !htab->is_vxworks)
4064 {
4065 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4066 abfd, r_symndx);
4067 if (isym == NULL)
4068 return FALSE;
4069
4070 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4071 {
4072 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4073 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4074 PLT_IFUNC);
4075 if (ifunc == NULL)
4076 return FALSE;
4077
4078 /* STT_GNU_IFUNC symbols must have a PLT entry;
4079 In a non-pie executable even when there are
4080 no plt calls. */
4081 if (!bfd_link_pic (info)
4082 || is_branch_reloc (r_type))
4083 {
4084 bfd_vma addend = 0;
4085 if (r_type == R_PPC_PLTREL24)
4086 {
4087 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4088 if (bfd_link_pic (info))
4089 addend = rel->r_addend;
4090 }
4091 if (!update_plt_info (abfd, ifunc, got2, addend))
4092 return FALSE;
4093 }
4094 }
4095 }
4096
4097 if (!htab->is_vxworks
4098 && is_branch_reloc (r_type)
4099 && h != NULL
4100 && h == tga)
4101 {
4102 if (rel != relocs
4103 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4104 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4105 /* We have a new-style __tls_get_addr call with a marker
4106 reloc. */
4107 ;
4108 else
4109 /* Mark this section as having an old-style call. */
4110 sec->has_tls_get_addr_call = 1;
4111 }
4112
4113 switch (r_type)
4114 {
4115 case R_PPC_TLSGD:
4116 case R_PPC_TLSLD:
4117 /* These special tls relocs tie a call to __tls_get_addr with
4118 its parameter symbol. */
4119 break;
4120
4121 case R_PPC_GOT_TLSLD16:
4122 case R_PPC_GOT_TLSLD16_LO:
4123 case R_PPC_GOT_TLSLD16_HI:
4124 case R_PPC_GOT_TLSLD16_HA:
4125 tls_type = TLS_TLS | TLS_LD;
4126 goto dogottls;
4127
4128 case R_PPC_GOT_TLSGD16:
4129 case R_PPC_GOT_TLSGD16_LO:
4130 case R_PPC_GOT_TLSGD16_HI:
4131 case R_PPC_GOT_TLSGD16_HA:
4132 tls_type = TLS_TLS | TLS_GD;
4133 goto dogottls;
4134
4135 case R_PPC_GOT_TPREL16:
4136 case R_PPC_GOT_TPREL16_LO:
4137 case R_PPC_GOT_TPREL16_HI:
4138 case R_PPC_GOT_TPREL16_HA:
4139 if (bfd_link_pic (info))
4140 info->flags |= DF_STATIC_TLS;
4141 tls_type = TLS_TLS | TLS_TPREL;
4142 goto dogottls;
4143
4144 case R_PPC_GOT_DTPREL16:
4145 case R_PPC_GOT_DTPREL16_LO:
4146 case R_PPC_GOT_DTPREL16_HI:
4147 case R_PPC_GOT_DTPREL16_HA:
4148 tls_type = TLS_TLS | TLS_DTPREL;
4149 dogottls:
4150 sec->has_tls_reloc = 1;
4151 /* Fall thru */
4152
4153 /* GOT16 relocations */
4154 case R_PPC_GOT16:
4155 case R_PPC_GOT16_LO:
4156 case R_PPC_GOT16_HI:
4157 case R_PPC_GOT16_HA:
4158 /* This symbol requires a global offset table entry. */
4159 if (htab->got == NULL)
4160 {
4161 if (htab->elf.dynobj == NULL)
4162 htab->elf.dynobj = abfd;
4163 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4164 return FALSE;
4165 }
4166 if (h != NULL)
4167 {
4168 h->got.refcount += 1;
4169 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4170 }
4171 else
4172 /* This is a global offset table entry for a local symbol. */
4173 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4174 return FALSE;
4175
4176 /* We may also need a plt entry if the symbol turns out to be
4177 an ifunc. */
4178 if (h != NULL && !bfd_link_pic (info))
4179 {
4180 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4181 return FALSE;
4182 }
4183 break;
4184
4185 /* Indirect .sdata relocation. */
4186 case R_PPC_EMB_SDAI16:
4187 if (bfd_link_pic (info))
4188 {
4189 bad_shared_reloc (abfd, r_type);
4190 return FALSE;
4191 }
4192 htab->sdata[0].sym->ref_regular = 1;
4193 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4194 h, rel))
4195 return FALSE;
4196 if (h != NULL)
4197 {
4198 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4199 h->non_got_ref = TRUE;
4200 }
4201 break;
4202
4203 /* Indirect .sdata2 relocation. */
4204 case R_PPC_EMB_SDA2I16:
4205 if (bfd_link_pic (info))
4206 {
4207 bad_shared_reloc (abfd, r_type);
4208 return FALSE;
4209 }
4210 htab->sdata[1].sym->ref_regular = 1;
4211 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4212 h, rel))
4213 return FALSE;
4214 if (h != NULL)
4215 {
4216 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4217 h->non_got_ref = TRUE;
4218 }
4219 break;
4220
4221 case R_PPC_SDAREL16:
4222 htab->sdata[0].sym->ref_regular = 1;
4223 /* Fall thru */
4224
4225 case R_PPC_VLE_SDAREL_LO16A:
4226 case R_PPC_VLE_SDAREL_LO16D:
4227 case R_PPC_VLE_SDAREL_HI16A:
4228 case R_PPC_VLE_SDAREL_HI16D:
4229 case R_PPC_VLE_SDAREL_HA16A:
4230 case R_PPC_VLE_SDAREL_HA16D:
4231 if (h != NULL)
4232 {
4233 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4234 h->non_got_ref = TRUE;
4235 }
4236 break;
4237
4238 case R_PPC_VLE_REL8:
4239 case R_PPC_VLE_REL15:
4240 case R_PPC_VLE_REL24:
4241 case R_PPC_VLE_LO16A:
4242 case R_PPC_VLE_LO16D:
4243 case R_PPC_VLE_HI16A:
4244 case R_PPC_VLE_HI16D:
4245 case R_PPC_VLE_HA16A:
4246 case R_PPC_VLE_HA16D:
4247 break;
4248
4249 case R_PPC_EMB_SDA2REL:
4250 if (bfd_link_pic (info))
4251 {
4252 bad_shared_reloc (abfd, r_type);
4253 return FALSE;
4254 }
4255 htab->sdata[1].sym->ref_regular = 1;
4256 if (h != NULL)
4257 {
4258 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4259 h->non_got_ref = TRUE;
4260 }
4261 break;
4262
4263 case R_PPC_VLE_SDA21_LO:
4264 case R_PPC_VLE_SDA21:
4265 case R_PPC_EMB_SDA21:
4266 case R_PPC_EMB_RELSDA:
4267 if (bfd_link_pic (info))
4268 {
4269 bad_shared_reloc (abfd, r_type);
4270 return FALSE;
4271 }
4272 if (h != NULL)
4273 {
4274 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4275 h->non_got_ref = TRUE;
4276 }
4277 break;
4278
4279 case R_PPC_EMB_NADDR32:
4280 case R_PPC_EMB_NADDR16:
4281 case R_PPC_EMB_NADDR16_LO:
4282 case R_PPC_EMB_NADDR16_HI:
4283 case R_PPC_EMB_NADDR16_HA:
4284 if (bfd_link_pic (info))
4285 {
4286 bad_shared_reloc (abfd, r_type);
4287 return FALSE;
4288 }
4289 if (h != NULL)
4290 h->non_got_ref = TRUE;
4291 break;
4292
4293 case R_PPC_PLTREL24:
4294 if (h == NULL)
4295 break;
4296 /* Fall through */
4297 case R_PPC_PLT32:
4298 case R_PPC_PLTREL32:
4299 case R_PPC_PLT16_LO:
4300 case R_PPC_PLT16_HI:
4301 case R_PPC_PLT16_HA:
4302 #ifdef DEBUG
4303 fprintf (stderr, "Reloc requires a PLT entry\n");
4304 #endif
4305 /* This symbol requires a procedure linkage table entry. */
4306 if (h == NULL)
4307 {
4308 if (ifunc == NULL)
4309 {
4310 /* It does not make sense to have a procedure linkage
4311 table entry for a non-ifunc local symbol. */
4312 info->callbacks->einfo
4313 (_("%P: %H: %s reloc against local symbol\n"),
4314 abfd, sec, rel->r_offset,
4315 ppc_elf_howto_table[r_type]->name);
4316 bfd_set_error (bfd_error_bad_value);
4317 return FALSE;
4318 }
4319 }
4320 else
4321 {
4322 bfd_vma addend = 0;
4323
4324 if (r_type == R_PPC_PLTREL24)
4325 {
4326 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4327 if (bfd_link_pic (info))
4328 addend = rel->r_addend;
4329 }
4330 h->needs_plt = 1;
4331 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4332 return FALSE;
4333 }
4334 break;
4335
4336 /* The following relocations don't need to propagate the
4337 relocation if linking a shared object since they are
4338 section relative. */
4339 case R_PPC_SECTOFF:
4340 case R_PPC_SECTOFF_LO:
4341 case R_PPC_SECTOFF_HI:
4342 case R_PPC_SECTOFF_HA:
4343 case R_PPC_DTPREL16:
4344 case R_PPC_DTPREL16_LO:
4345 case R_PPC_DTPREL16_HI:
4346 case R_PPC_DTPREL16_HA:
4347 case R_PPC_TOC16:
4348 break;
4349
4350 case R_PPC_REL16:
4351 case R_PPC_REL16_LO:
4352 case R_PPC_REL16_HI:
4353 case R_PPC_REL16_HA:
4354 case R_PPC_REL16DX_HA:
4355 ppc_elf_tdata (abfd)->has_rel16 = 1;
4356 break;
4357
4358 /* These are just markers. */
4359 case R_PPC_TLS:
4360 case R_PPC_EMB_MRKREF:
4361 case R_PPC_NONE:
4362 case R_PPC_max:
4363 case R_PPC_RELAX:
4364 case R_PPC_RELAX_PLT:
4365 case R_PPC_RELAX_PLTREL24:
4366 break;
4367
4368 /* These should only appear in dynamic objects. */
4369 case R_PPC_COPY:
4370 case R_PPC_GLOB_DAT:
4371 case R_PPC_JMP_SLOT:
4372 case R_PPC_RELATIVE:
4373 case R_PPC_IRELATIVE:
4374 break;
4375
4376 /* These aren't handled yet. We'll report an error later. */
4377 case R_PPC_ADDR30:
4378 case R_PPC_EMB_RELSEC16:
4379 case R_PPC_EMB_RELST_LO:
4380 case R_PPC_EMB_RELST_HI:
4381 case R_PPC_EMB_RELST_HA:
4382 case R_PPC_EMB_BIT_FLD:
4383 break;
4384
4385 /* This refers only to functions defined in the shared library. */
4386 case R_PPC_LOCAL24PC:
4387 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4388 {
4389 htab->plt_type = PLT_OLD;
4390 htab->old_bfd = abfd;
4391 }
4392 if (h != NULL && h->type == STT_GNU_IFUNC)
4393 {
4394 h->needs_plt = 1;
4395 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4396 return FALSE;
4397 }
4398 break;
4399
4400 /* This relocation describes the C++ object vtable hierarchy.
4401 Reconstruct it for later use during GC. */
4402 case R_PPC_GNU_VTINHERIT:
4403 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4404 return FALSE;
4405 break;
4406
4407 /* This relocation describes which C++ vtable entries are actually
4408 used. Record for later use during GC. */
4409 case R_PPC_GNU_VTENTRY:
4410 BFD_ASSERT (h != NULL);
4411 if (h != NULL
4412 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4413 return FALSE;
4414 break;
4415
4416 /* We shouldn't really be seeing these. */
4417 case R_PPC_TPREL32:
4418 case R_PPC_TPREL16:
4419 case R_PPC_TPREL16_LO:
4420 case R_PPC_TPREL16_HI:
4421 case R_PPC_TPREL16_HA:
4422 if (bfd_link_pic (info))
4423 info->flags |= DF_STATIC_TLS;
4424 goto dodyn;
4425
4426 /* Nor these. */
4427 case R_PPC_DTPMOD32:
4428 case R_PPC_DTPREL32:
4429 goto dodyn;
4430
4431 case R_PPC_REL32:
4432 if (h == NULL
4433 && got2 != NULL
4434 && (sec->flags & SEC_CODE) != 0
4435 && bfd_link_pic (info)
4436 && htab->plt_type == PLT_UNSET)
4437 {
4438 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4439 the start of a function, which assembles to a REL32
4440 reference to .got2. If we detect one of these, then
4441 force the old PLT layout because the linker cannot
4442 reliably deduce the GOT pointer value needed for
4443 PLT call stubs. */
4444 asection *s;
4445 Elf_Internal_Sym *isym;
4446
4447 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4448 abfd, r_symndx);
4449 if (isym == NULL)
4450 return FALSE;
4451
4452 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4453 if (s == got2)
4454 {
4455 htab->plt_type = PLT_OLD;
4456 htab->old_bfd = abfd;
4457 }
4458 }
4459 if (h == NULL || h == htab->elf.hgot)
4460 break;
4461 /* fall through */
4462
4463 case R_PPC_ADDR32:
4464 case R_PPC_ADDR16:
4465 case R_PPC_ADDR16_LO:
4466 case R_PPC_ADDR16_HI:
4467 case R_PPC_ADDR16_HA:
4468 case R_PPC_UADDR32:
4469 case R_PPC_UADDR16:
4470 if (h != NULL && !bfd_link_pic (info))
4471 {
4472 /* We may need a plt entry if the symbol turns out to be
4473 a function defined in a dynamic object. */
4474 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4475 return FALSE;
4476
4477 /* We may need a copy reloc too. */
4478 h->non_got_ref = 1;
4479 h->pointer_equality_needed = 1;
4480 if (r_type == R_PPC_ADDR16_HA)
4481 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4482 if (r_type == R_PPC_ADDR16_LO)
4483 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4484 }
4485 goto dodyn;
4486
4487 case R_PPC_REL24:
4488 case R_PPC_REL14:
4489 case R_PPC_REL14_BRTAKEN:
4490 case R_PPC_REL14_BRNTAKEN:
4491 if (h == NULL)
4492 break;
4493 if (h == htab->elf.hgot)
4494 {
4495 if (htab->plt_type == PLT_UNSET)
4496 {
4497 htab->plt_type = PLT_OLD;
4498 htab->old_bfd = abfd;
4499 }
4500 break;
4501 }
4502 /* fall through */
4503
4504 case R_PPC_ADDR24:
4505 case R_PPC_ADDR14:
4506 case R_PPC_ADDR14_BRTAKEN:
4507 case R_PPC_ADDR14_BRNTAKEN:
4508 if (h != NULL && !bfd_link_pic (info))
4509 {
4510 /* We may need a plt entry if the symbol turns out to be
4511 a function defined in a dynamic object. */
4512 h->needs_plt = 1;
4513 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4514 return FALSE;
4515 break;
4516 }
4517
4518 dodyn:
4519 /* If we are creating a shared library, and this is a reloc
4520 against a global symbol, or a non PC relative reloc
4521 against a local symbol, then we need to copy the reloc
4522 into the shared library. However, if we are linking with
4523 -Bsymbolic, we do not need to copy a reloc against a
4524 global symbol which is defined in an object we are
4525 including in the link (i.e., DEF_REGULAR is set). At
4526 this point we have not seen all the input files, so it is
4527 possible that DEF_REGULAR is not set now but will be set
4528 later (it is never cleared). In case of a weak definition,
4529 DEF_REGULAR may be cleared later by a strong definition in
4530 a shared library. We account for that possibility below by
4531 storing information in the dyn_relocs field of the hash
4532 table entry. A similar situation occurs when creating
4533 shared libraries and symbol visibility changes render the
4534 symbol local.
4535
4536 If on the other hand, we are creating an executable, we
4537 may need to keep relocations for symbols satisfied by a
4538 dynamic library if we manage to avoid copy relocs for the
4539 symbol. */
4540 if ((bfd_link_pic (info)
4541 && (must_be_dyn_reloc (info, r_type)
4542 || (h != NULL
4543 && (!SYMBOLIC_BIND (info, h)
4544 || h->root.type == bfd_link_hash_defweak
4545 || !h->def_regular))))
4546 || (ELIMINATE_COPY_RELOCS
4547 && !bfd_link_pic (info)
4548 && h != NULL
4549 && (h->root.type == bfd_link_hash_defweak
4550 || !h->def_regular)))
4551 {
4552 #ifdef DEBUG
4553 fprintf (stderr,
4554 "ppc_elf_check_relocs needs to "
4555 "create relocation for %s\n",
4556 (h && h->root.root.string
4557 ? h->root.root.string : "<unknown>"));
4558 #endif
4559 if (sreloc == NULL)
4560 {
4561 if (htab->elf.dynobj == NULL)
4562 htab->elf.dynobj = abfd;
4563
4564 sreloc = _bfd_elf_make_dynamic_reloc_section
4565 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4566
4567 if (sreloc == NULL)
4568 return FALSE;
4569 }
4570
4571 /* If this is a global symbol, we count the number of
4572 relocations we need for this symbol. */
4573 if (h != NULL)
4574 {
4575 struct elf_dyn_relocs *p;
4576 struct elf_dyn_relocs **rel_head;
4577
4578 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4579 p = *rel_head;
4580 if (p == NULL || p->sec != sec)
4581 {
4582 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4583 if (p == NULL)
4584 return FALSE;
4585 p->next = *rel_head;
4586 *rel_head = p;
4587 p->sec = sec;
4588 p->count = 0;
4589 p->pc_count = 0;
4590 }
4591 p->count += 1;
4592 if (!must_be_dyn_reloc (info, r_type))
4593 p->pc_count += 1;
4594 }
4595 else
4596 {
4597 /* Track dynamic relocs needed for local syms too.
4598 We really need local syms available to do this
4599 easily. Oh well. */
4600 struct ppc_dyn_relocs *p;
4601 struct ppc_dyn_relocs **rel_head;
4602 bfd_boolean is_ifunc;
4603 asection *s;
4604 void *vpp;
4605 Elf_Internal_Sym *isym;
4606
4607 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4608 abfd, r_symndx);
4609 if (isym == NULL)
4610 return FALSE;
4611
4612 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4613 if (s == NULL)
4614 s = sec;
4615
4616 vpp = &elf_section_data (s)->local_dynrel;
4617 rel_head = (struct ppc_dyn_relocs **) vpp;
4618 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4619 p = *rel_head;
4620 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4621 p = p->next;
4622 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4623 {
4624 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4625 if (p == NULL)
4626 return FALSE;
4627 p->next = *rel_head;
4628 *rel_head = p;
4629 p->sec = sec;
4630 p->ifunc = is_ifunc;
4631 p->count = 0;
4632 }
4633 p->count += 1;
4634 }
4635 }
4636
4637 break;
4638 }
4639 }
4640
4641 return TRUE;
4642 }
4643 \f
4644
4645 /* Merge object attributes from IBFD into OBFD. Raise an error if
4646 there are conflicting attributes. */
4647 static bfd_boolean
4648 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4649 {
4650 obj_attribute *in_attr, *in_attrs;
4651 obj_attribute *out_attr, *out_attrs;
4652
4653 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4654 {
4655 /* This is the first object. Copy the attributes. */
4656 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4657
4658 /* Use the Tag_null value to indicate the attributes have been
4659 initialized. */
4660 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4661
4662 return TRUE;
4663 }
4664
4665 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4666 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4667
4668 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4669 non-conflicting ones. */
4670 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4671 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4672 if (in_attr->i != out_attr->i)
4673 {
4674 out_attr->type = 1;
4675 if (out_attr->i == 0)
4676 out_attr->i = in_attr->i;
4677 else if (in_attr->i == 0)
4678 ;
4679 else if (out_attr->i == 1 && in_attr->i == 2)
4680 _bfd_error_handler
4681 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4682 else if (out_attr->i == 1 && in_attr->i == 3)
4683 _bfd_error_handler
4684 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4685 obfd, ibfd);
4686 else if (out_attr->i == 3 && in_attr->i == 1)
4687 _bfd_error_handler
4688 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4689 ibfd, obfd);
4690 else if (out_attr->i == 3 && in_attr->i == 2)
4691 _bfd_error_handler
4692 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4693 ibfd, obfd);
4694 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4695 _bfd_error_handler
4696 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4697 else if (in_attr->i > 3)
4698 _bfd_error_handler
4699 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4700 in_attr->i);
4701 else
4702 _bfd_error_handler
4703 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4704 out_attr->i);
4705 }
4706
4707 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4708 merge non-conflicting ones. */
4709 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4710 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4711 if (in_attr->i != out_attr->i)
4712 {
4713 const char *in_abi = NULL, *out_abi = NULL;
4714
4715 switch (in_attr->i)
4716 {
4717 case 1: in_abi = "generic"; break;
4718 case 2: in_abi = "AltiVec"; break;
4719 case 3: in_abi = "SPE"; break;
4720 }
4721
4722 switch (out_attr->i)
4723 {
4724 case 1: out_abi = "generic"; break;
4725 case 2: out_abi = "AltiVec"; break;
4726 case 3: out_abi = "SPE"; break;
4727 }
4728
4729 out_attr->type = 1;
4730 if (out_attr->i == 0)
4731 out_attr->i = in_attr->i;
4732 else if (in_attr->i == 0)
4733 ;
4734 /* For now, allow generic to transition to AltiVec or SPE
4735 without a warning. If GCC marked files with their stack
4736 alignment and used don't-care markings for files which are
4737 not affected by the vector ABI, we could warn about this
4738 case too. */
4739 else if (out_attr->i == 1)
4740 out_attr->i = in_attr->i;
4741 else if (in_attr->i == 1)
4742 ;
4743 else if (in_abi == NULL)
4744 _bfd_error_handler
4745 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4746 in_attr->i);
4747 else if (out_abi == NULL)
4748 _bfd_error_handler
4749 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4750 in_attr->i);
4751 else
4752 _bfd_error_handler
4753 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4754 ibfd, obfd, in_abi, out_abi);
4755 }
4756
4757 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4758 and merge non-conflicting ones. */
4759 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4760 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4761 if (in_attr->i != out_attr->i)
4762 {
4763 out_attr->type = 1;
4764 if (out_attr->i == 0)
4765 out_attr->i = in_attr->i;
4766 else if (in_attr->i == 0)
4767 ;
4768 else if (out_attr->i == 1 && in_attr->i == 2)
4769 _bfd_error_handler
4770 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4771 else if (out_attr->i == 2 && in_attr->i == 1)
4772 _bfd_error_handler
4773 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4774 else if (in_attr->i > 2)
4775 _bfd_error_handler
4776 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4777 in_attr->i);
4778 else
4779 _bfd_error_handler
4780 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4781 out_attr->i);
4782 }
4783
4784 /* Merge Tag_compatibility attributes and any common GNU ones. */
4785 _bfd_elf_merge_object_attributes (ibfd, obfd);
4786
4787 return TRUE;
4788 }
4789
4790 /* Merge backend specific data from an object file to the output
4791 object file when linking. */
4792
4793 static bfd_boolean
4794 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4795 {
4796 flagword old_flags;
4797 flagword new_flags;
4798 bfd_boolean error;
4799
4800 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4801 return TRUE;
4802
4803 /* Check if we have the same endianness. */
4804 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4805 return FALSE;
4806
4807 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4808 return FALSE;
4809
4810 new_flags = elf_elfheader (ibfd)->e_flags;
4811 old_flags = elf_elfheader (obfd)->e_flags;
4812 if (!elf_flags_init (obfd))
4813 {
4814 /* First call, no flags set. */
4815 elf_flags_init (obfd) = TRUE;
4816 elf_elfheader (obfd)->e_flags = new_flags;
4817 }
4818
4819 /* Compatible flags are ok. */
4820 else if (new_flags == old_flags)
4821 ;
4822
4823 /* Incompatible flags. */
4824 else
4825 {
4826 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4827 to be linked with either. */
4828 error = FALSE;
4829 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4830 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4831 {
4832 error = TRUE;
4833 (*_bfd_error_handler)
4834 (_("%B: compiled with -mrelocatable and linked with "
4835 "modules compiled normally"), ibfd);
4836 }
4837 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4838 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4839 {
4840 error = TRUE;
4841 (*_bfd_error_handler)
4842 (_("%B: compiled normally and linked with "
4843 "modules compiled with -mrelocatable"), ibfd);
4844 }
4845
4846 /* The output is -mrelocatable-lib iff both the input files are. */
4847 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4848 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4849
4850 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4851 but each input file is either -mrelocatable or -mrelocatable-lib. */
4852 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4853 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4854 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4855 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4856
4857 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4858 any module uses it. */
4859 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4860
4861 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4862 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4863
4864 /* Warn about any other mismatches. */
4865 if (new_flags != old_flags)
4866 {
4867 error = TRUE;
4868 (*_bfd_error_handler)
4869 (_("%B: uses different e_flags (0x%lx) fields "
4870 "than previous modules (0x%lx)"),
4871 ibfd, (long) new_flags, (long) old_flags);
4872 }
4873
4874 if (error)
4875 {
4876 bfd_set_error (bfd_error_bad_value);
4877 return FALSE;
4878 }
4879 }
4880
4881 return TRUE;
4882 }
4883
4884 static void
4885 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4886 bfd_vma value,
4887 split16_format_type split16_format)
4888
4889 {
4890 unsigned int insn, top5;
4891
4892 insn = bfd_get_32 (output_bfd, loc);
4893 top5 = value & 0xf800;
4894 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4895 insn &= (split16_format == split16a_type ? ~0x1f007ff : ~0x1f07ff);
4896 insn |= top5;
4897 insn |= value & 0x7ff;
4898 bfd_put_32 (output_bfd, insn, loc);
4899 }
4900
4901 \f
4902 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4903 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4904 int
4905 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4906 struct bfd_link_info *info)
4907 {
4908 struct ppc_elf_link_hash_table *htab;
4909 flagword flags;
4910
4911 htab = ppc_elf_hash_table (info);
4912
4913 if (htab->plt_type == PLT_UNSET)
4914 {
4915 struct elf_link_hash_entry *h;
4916
4917 if (htab->params->plt_style == PLT_OLD)
4918 htab->plt_type = PLT_OLD;
4919 else if (bfd_link_pic (info)
4920 && htab->elf.dynamic_sections_created
4921 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4922 FALSE, FALSE, TRUE)) != NULL
4923 && (h->type == STT_FUNC
4924 || h->needs_plt)
4925 && h->ref_regular
4926 && !(SYMBOL_CALLS_LOCAL (info, h)
4927 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4928 && h->root.type == bfd_link_hash_undefweak)))
4929 {
4930 /* Profiling of shared libs (and pies) is not supported with
4931 secure plt, because ppc32 does profiling before a
4932 function prologue and a secure plt pic call stubs needs
4933 r30 to be set up. */
4934 htab->plt_type = PLT_OLD;
4935 }
4936 else
4937 {
4938 bfd *ibfd;
4939 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4940
4941 /* Look through the reloc flags left by ppc_elf_check_relocs.
4942 Use the old style bss plt if a file makes plt calls
4943 without using the new relocs, and if ld isn't given
4944 --secure-plt and we never see REL16 relocs. */
4945 if (plt_type == PLT_UNSET)
4946 plt_type = PLT_OLD;
4947 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4948 if (is_ppc_elf (ibfd))
4949 {
4950 if (ppc_elf_tdata (ibfd)->has_rel16)
4951 plt_type = PLT_NEW;
4952 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4953 {
4954 plt_type = PLT_OLD;
4955 htab->old_bfd = ibfd;
4956 break;
4957 }
4958 }
4959 htab->plt_type = plt_type;
4960 }
4961 }
4962 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4963 {
4964 if (htab->old_bfd != NULL)
4965 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4966 htab->old_bfd);
4967 else
4968 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4969 }
4970
4971 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4972
4973 if (htab->plt_type == PLT_NEW)
4974 {
4975 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4976 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4977
4978 /* The new PLT is a loaded section. */
4979 if (htab->plt != NULL
4980 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4981 return -1;
4982
4983 /* The new GOT is not executable. */
4984 if (htab->got != NULL
4985 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4986 return -1;
4987 }
4988 else
4989 {
4990 /* Stop an unused .glink section from affecting .text alignment. */
4991 if (htab->glink != NULL
4992 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4993 return -1;
4994 }
4995 return htab->plt_type == PLT_NEW;
4996 }
4997 \f
4998 /* Return the section that should be marked against GC for a given
4999 relocation. */
5000
5001 static asection *
5002 ppc_elf_gc_mark_hook (asection *sec,
5003 struct bfd_link_info *info,
5004 Elf_Internal_Rela *rel,
5005 struct elf_link_hash_entry *h,
5006 Elf_Internal_Sym *sym)
5007 {
5008 if (h != NULL)
5009 switch (ELF32_R_TYPE (rel->r_info))
5010 {
5011 case R_PPC_GNU_VTINHERIT:
5012 case R_PPC_GNU_VTENTRY:
5013 return NULL;
5014 }
5015
5016 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5017 }
5018
5019 /* Update the got, plt and dynamic reloc reference counts for the
5020 section being removed. */
5021
5022 static bfd_boolean
5023 ppc_elf_gc_sweep_hook (bfd *abfd,
5024 struct bfd_link_info *info,
5025 asection *sec,
5026 const Elf_Internal_Rela *relocs)
5027 {
5028 struct ppc_elf_link_hash_table *htab;
5029 Elf_Internal_Shdr *symtab_hdr;
5030 struct elf_link_hash_entry **sym_hashes;
5031 bfd_signed_vma *local_got_refcounts;
5032 const Elf_Internal_Rela *rel, *relend;
5033 asection *got2;
5034
5035 if (bfd_link_relocatable (info))
5036 return TRUE;
5037
5038 if ((sec->flags & SEC_ALLOC) == 0)
5039 return TRUE;
5040
5041 elf_section_data (sec)->local_dynrel = NULL;
5042
5043 htab = ppc_elf_hash_table (info);
5044 symtab_hdr = &elf_symtab_hdr (abfd);
5045 sym_hashes = elf_sym_hashes (abfd);
5046 local_got_refcounts = elf_local_got_refcounts (abfd);
5047 got2 = bfd_get_section_by_name (abfd, ".got2");
5048
5049 relend = relocs + sec->reloc_count;
5050 for (rel = relocs; rel < relend; rel++)
5051 {
5052 unsigned long r_symndx;
5053 enum elf_ppc_reloc_type r_type;
5054 struct elf_link_hash_entry *h = NULL;
5055
5056 r_symndx = ELF32_R_SYM (rel->r_info);
5057 if (r_symndx >= symtab_hdr->sh_info)
5058 {
5059 struct elf_dyn_relocs **pp, *p;
5060 struct ppc_elf_link_hash_entry *eh;
5061
5062 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5063 while (h->root.type == bfd_link_hash_indirect
5064 || h->root.type == bfd_link_hash_warning)
5065 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5066 eh = (struct ppc_elf_link_hash_entry *) h;
5067
5068 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5069 if (p->sec == sec)
5070 {
5071 /* Everything must go for SEC. */
5072 *pp = p->next;
5073 break;
5074 }
5075 }
5076
5077 r_type = ELF32_R_TYPE (rel->r_info);
5078 if (!htab->is_vxworks
5079 && h == NULL
5080 && local_got_refcounts != NULL
5081 && (!bfd_link_pic (info)
5082 || is_branch_reloc (r_type)))
5083 {
5084 struct plt_entry **local_plt = (struct plt_entry **)
5085 (local_got_refcounts + symtab_hdr->sh_info);
5086 char *local_got_tls_masks = (char *)
5087 (local_plt + symtab_hdr->sh_info);
5088 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5089 {
5090 struct plt_entry **ifunc = local_plt + r_symndx;
5091 bfd_vma addend = 0;
5092 struct plt_entry *ent;
5093
5094 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5095 addend = rel->r_addend;
5096 ent = find_plt_ent (ifunc, got2, addend);
5097 if (ent->plt.refcount > 0)
5098 ent->plt.refcount -= 1;
5099 continue;
5100 }
5101 }
5102
5103 switch (r_type)
5104 {
5105 case R_PPC_GOT_TLSLD16:
5106 case R_PPC_GOT_TLSLD16_LO:
5107 case R_PPC_GOT_TLSLD16_HI:
5108 case R_PPC_GOT_TLSLD16_HA:
5109 case R_PPC_GOT_TLSGD16:
5110 case R_PPC_GOT_TLSGD16_LO:
5111 case R_PPC_GOT_TLSGD16_HI:
5112 case R_PPC_GOT_TLSGD16_HA:
5113 case R_PPC_GOT_TPREL16:
5114 case R_PPC_GOT_TPREL16_LO:
5115 case R_PPC_GOT_TPREL16_HI:
5116 case R_PPC_GOT_TPREL16_HA:
5117 case R_PPC_GOT_DTPREL16:
5118 case R_PPC_GOT_DTPREL16_LO:
5119 case R_PPC_GOT_DTPREL16_HI:
5120 case R_PPC_GOT_DTPREL16_HA:
5121 case R_PPC_GOT16:
5122 case R_PPC_GOT16_LO:
5123 case R_PPC_GOT16_HI:
5124 case R_PPC_GOT16_HA:
5125 if (h != NULL)
5126 {
5127 if (h->got.refcount > 0)
5128 h->got.refcount--;
5129 if (!bfd_link_pic (info))
5130 {
5131 struct plt_entry *ent;
5132
5133 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5134 if (ent != NULL && ent->plt.refcount > 0)
5135 ent->plt.refcount -= 1;
5136 }
5137 }
5138 else if (local_got_refcounts != NULL)
5139 {
5140 if (local_got_refcounts[r_symndx] > 0)
5141 local_got_refcounts[r_symndx]--;
5142 }
5143 break;
5144
5145 case R_PPC_REL24:
5146 case R_PPC_REL14:
5147 case R_PPC_REL14_BRTAKEN:
5148 case R_PPC_REL14_BRNTAKEN:
5149 case R_PPC_REL32:
5150 if (h == NULL || h == htab->elf.hgot)
5151 break;
5152 /* Fall thru */
5153
5154 case R_PPC_ADDR32:
5155 case R_PPC_ADDR24:
5156 case R_PPC_ADDR16:
5157 case R_PPC_ADDR16_LO:
5158 case R_PPC_ADDR16_HI:
5159 case R_PPC_ADDR16_HA:
5160 case R_PPC_ADDR14:
5161 case R_PPC_ADDR14_BRTAKEN:
5162 case R_PPC_ADDR14_BRNTAKEN:
5163 case R_PPC_UADDR32:
5164 case R_PPC_UADDR16:
5165 if (bfd_link_pic (info))
5166 break;
5167
5168 case R_PPC_PLT32:
5169 case R_PPC_PLTREL24:
5170 case R_PPC_PLTREL32:
5171 case R_PPC_PLT16_LO:
5172 case R_PPC_PLT16_HI:
5173 case R_PPC_PLT16_HA:
5174 if (h != NULL)
5175 {
5176 bfd_vma addend = 0;
5177 struct plt_entry *ent;
5178
5179 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5180 addend = rel->r_addend;
5181 ent = find_plt_ent (&h->plt.plist, got2, addend);
5182 if (ent != NULL && ent->plt.refcount > 0)
5183 ent->plt.refcount -= 1;
5184 }
5185 break;
5186
5187 default:
5188 break;
5189 }
5190 }
5191 return TRUE;
5192 }
5193 \f
5194 /* Set plt output section type, htab->tls_get_addr, and call the
5195 generic ELF tls_setup function. */
5196
5197 asection *
5198 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5199 {
5200 struct ppc_elf_link_hash_table *htab;
5201
5202 htab = ppc_elf_hash_table (info);
5203 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5204 FALSE, FALSE, TRUE);
5205 if (htab->plt_type != PLT_NEW)
5206 htab->params->no_tls_get_addr_opt = TRUE;
5207
5208 if (!htab->params->no_tls_get_addr_opt)
5209 {
5210 struct elf_link_hash_entry *opt, *tga;
5211 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5212 FALSE, FALSE, TRUE);
5213 if (opt != NULL
5214 && (opt->root.type == bfd_link_hash_defined
5215 || opt->root.type == bfd_link_hash_defweak))
5216 {
5217 /* If glibc supports an optimized __tls_get_addr call stub,
5218 signalled by the presence of __tls_get_addr_opt, and we'll
5219 be calling __tls_get_addr via a plt call stub, then
5220 make __tls_get_addr point to __tls_get_addr_opt. */
5221 tga = htab->tls_get_addr;
5222 if (htab->elf.dynamic_sections_created
5223 && tga != NULL
5224 && (tga->type == STT_FUNC
5225 || tga->needs_plt)
5226 && !(SYMBOL_CALLS_LOCAL (info, tga)
5227 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5228 && tga->root.type == bfd_link_hash_undefweak)))
5229 {
5230 struct plt_entry *ent;
5231 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5232 if (ent->plt.refcount > 0)
5233 break;
5234 if (ent != NULL)
5235 {
5236 tga->root.type = bfd_link_hash_indirect;
5237 tga->root.u.i.link = &opt->root;
5238 ppc_elf_copy_indirect_symbol (info, opt, tga);
5239 opt->forced_local = 0;
5240 if (opt->dynindx != -1)
5241 {
5242 /* Use __tls_get_addr_opt in dynamic relocations. */
5243 opt->dynindx = -1;
5244 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5245 opt->dynstr_index);
5246 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5247 return FALSE;
5248 }
5249 htab->tls_get_addr = opt;
5250 }
5251 }
5252 }
5253 else
5254 htab->params->no_tls_get_addr_opt = TRUE;
5255 }
5256 if (htab->plt_type == PLT_NEW
5257 && htab->plt != NULL
5258 && htab->plt->output_section != NULL)
5259 {
5260 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5261 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5262 }
5263
5264 return _bfd_elf_tls_setup (obfd, info);
5265 }
5266
5267 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5268 HASH. */
5269
5270 static bfd_boolean
5271 branch_reloc_hash_match (const bfd *ibfd,
5272 const Elf_Internal_Rela *rel,
5273 const struct elf_link_hash_entry *hash)
5274 {
5275 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5276 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5277 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5278
5279 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5280 {
5281 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5282 struct elf_link_hash_entry *h;
5283
5284 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5285 while (h->root.type == bfd_link_hash_indirect
5286 || h->root.type == bfd_link_hash_warning)
5287 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5288 if (h == hash)
5289 return TRUE;
5290 }
5291 return FALSE;
5292 }
5293
5294 /* Run through all the TLS relocs looking for optimization
5295 opportunities. */
5296
5297 bfd_boolean
5298 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5299 struct bfd_link_info *info)
5300 {
5301 bfd *ibfd;
5302 asection *sec;
5303 struct ppc_elf_link_hash_table *htab;
5304 int pass;
5305
5306 if (!bfd_link_executable (info))
5307 return TRUE;
5308
5309 htab = ppc_elf_hash_table (info);
5310 if (htab == NULL)
5311 return FALSE;
5312
5313 /* Make two passes through the relocs. First time check that tls
5314 relocs involved in setting up a tls_get_addr call are indeed
5315 followed by such a call. If they are not, don't do any tls
5316 optimization. On the second pass twiddle tls_mask flags to
5317 notify relocate_section that optimization can be done, and
5318 adjust got and plt refcounts. */
5319 for (pass = 0; pass < 2; ++pass)
5320 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5321 {
5322 Elf_Internal_Sym *locsyms = NULL;
5323 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5324 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5325
5326 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5327 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5328 {
5329 Elf_Internal_Rela *relstart, *rel, *relend;
5330 int expecting_tls_get_addr = 0;
5331
5332 /* Read the relocations. */
5333 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5334 info->keep_memory);
5335 if (relstart == NULL)
5336 return FALSE;
5337
5338 relend = relstart + sec->reloc_count;
5339 for (rel = relstart; rel < relend; rel++)
5340 {
5341 enum elf_ppc_reloc_type r_type;
5342 unsigned long r_symndx;
5343 struct elf_link_hash_entry *h = NULL;
5344 char *tls_mask;
5345 char tls_set, tls_clear;
5346 bfd_boolean is_local;
5347 bfd_signed_vma *got_count;
5348
5349 r_symndx = ELF32_R_SYM (rel->r_info);
5350 if (r_symndx >= symtab_hdr->sh_info)
5351 {
5352 struct elf_link_hash_entry **sym_hashes;
5353
5354 sym_hashes = elf_sym_hashes (ibfd);
5355 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5356 while (h->root.type == bfd_link_hash_indirect
5357 || h->root.type == bfd_link_hash_warning)
5358 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5359 }
5360
5361 is_local = FALSE;
5362 if (h == NULL
5363 || !h->def_dynamic)
5364 is_local = TRUE;
5365
5366 r_type = ELF32_R_TYPE (rel->r_info);
5367 /* If this section has old-style __tls_get_addr calls
5368 without marker relocs, then check that each
5369 __tls_get_addr call reloc is preceded by a reloc
5370 that conceivably belongs to the __tls_get_addr arg
5371 setup insn. If we don't find matching arg setup
5372 relocs, don't do any tls optimization. */
5373 if (pass == 0
5374 && sec->has_tls_get_addr_call
5375 && h != NULL
5376 && h == htab->tls_get_addr
5377 && !expecting_tls_get_addr
5378 && is_branch_reloc (r_type))
5379 {
5380 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5381 "TLS optimization disabled\n",
5382 ibfd, sec, rel->r_offset);
5383 if (elf_section_data (sec)->relocs != relstart)
5384 free (relstart);
5385 return TRUE;
5386 }
5387
5388 expecting_tls_get_addr = 0;
5389 switch (r_type)
5390 {
5391 case R_PPC_GOT_TLSLD16:
5392 case R_PPC_GOT_TLSLD16_LO:
5393 expecting_tls_get_addr = 1;
5394 /* Fall thru */
5395
5396 case R_PPC_GOT_TLSLD16_HI:
5397 case R_PPC_GOT_TLSLD16_HA:
5398 /* These relocs should never be against a symbol
5399 defined in a shared lib. Leave them alone if
5400 that turns out to be the case. */
5401 if (!is_local)
5402 continue;
5403
5404 /* LD -> LE */
5405 tls_set = 0;
5406 tls_clear = TLS_LD;
5407 break;
5408
5409 case R_PPC_GOT_TLSGD16:
5410 case R_PPC_GOT_TLSGD16_LO:
5411 expecting_tls_get_addr = 1;
5412 /* Fall thru */
5413
5414 case R_PPC_GOT_TLSGD16_HI:
5415 case R_PPC_GOT_TLSGD16_HA:
5416 if (is_local)
5417 /* GD -> LE */
5418 tls_set = 0;
5419 else
5420 /* GD -> IE */
5421 tls_set = TLS_TLS | TLS_TPRELGD;
5422 tls_clear = TLS_GD;
5423 break;
5424
5425 case R_PPC_GOT_TPREL16:
5426 case R_PPC_GOT_TPREL16_LO:
5427 case R_PPC_GOT_TPREL16_HI:
5428 case R_PPC_GOT_TPREL16_HA:
5429 if (is_local)
5430 {
5431 /* IE -> LE */
5432 tls_set = 0;
5433 tls_clear = TLS_TPREL;
5434 break;
5435 }
5436 else
5437 continue;
5438
5439 case R_PPC_TLSGD:
5440 case R_PPC_TLSLD:
5441 expecting_tls_get_addr = 2;
5442 tls_set = 0;
5443 tls_clear = 0;
5444 break;
5445
5446 default:
5447 continue;
5448 }
5449
5450 if (pass == 0)
5451 {
5452 if (!expecting_tls_get_addr
5453 || (expecting_tls_get_addr == 1
5454 && !sec->has_tls_get_addr_call))
5455 continue;
5456
5457 if (rel + 1 < relend
5458 && branch_reloc_hash_match (ibfd, rel + 1,
5459 htab->tls_get_addr))
5460 continue;
5461
5462 /* Uh oh, we didn't find the expected call. We
5463 could just mark this symbol to exclude it
5464 from tls optimization but it's safer to skip
5465 the entire optimization. */
5466 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5467 "TLS optimization disabled\n"),
5468 ibfd, sec, rel->r_offset);
5469 if (elf_section_data (sec)->relocs != relstart)
5470 free (relstart);
5471 return TRUE;
5472 }
5473
5474 if (expecting_tls_get_addr)
5475 {
5476 struct plt_entry *ent;
5477 bfd_vma addend = 0;
5478
5479 if (bfd_link_pic (info)
5480 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5481 addend = rel[1].r_addend;
5482 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5483 got2, addend);
5484 if (ent != NULL && ent->plt.refcount > 0)
5485 ent->plt.refcount -= 1;
5486
5487 if (expecting_tls_get_addr == 2)
5488 continue;
5489 }
5490
5491 if (h != NULL)
5492 {
5493 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5494 got_count = &h->got.refcount;
5495 }
5496 else
5497 {
5498 bfd_signed_vma *lgot_refs;
5499 struct plt_entry **local_plt;
5500 char *lgot_masks;
5501
5502 if (locsyms == NULL)
5503 {
5504 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5505 if (locsyms == NULL)
5506 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5507 symtab_hdr->sh_info,
5508 0, NULL, NULL, NULL);
5509 if (locsyms == NULL)
5510 {
5511 if (elf_section_data (sec)->relocs != relstart)
5512 free (relstart);
5513 return FALSE;
5514 }
5515 }
5516 lgot_refs = elf_local_got_refcounts (ibfd);
5517 if (lgot_refs == NULL)
5518 abort ();
5519 local_plt = (struct plt_entry **)
5520 (lgot_refs + symtab_hdr->sh_info);
5521 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5522 tls_mask = &lgot_masks[r_symndx];
5523 got_count = &lgot_refs[r_symndx];
5524 }
5525
5526 if (tls_set == 0)
5527 {
5528 /* We managed to get rid of a got entry. */
5529 if (*got_count > 0)
5530 *got_count -= 1;
5531 }
5532
5533 *tls_mask |= tls_set;
5534 *tls_mask &= ~tls_clear;
5535 }
5536
5537 if (elf_section_data (sec)->relocs != relstart)
5538 free (relstart);
5539 }
5540
5541 if (locsyms != NULL
5542 && (symtab_hdr->contents != (unsigned char *) locsyms))
5543 {
5544 if (!info->keep_memory)
5545 free (locsyms);
5546 else
5547 symtab_hdr->contents = (unsigned char *) locsyms;
5548 }
5549 }
5550 return TRUE;
5551 }
5552 \f
5553 /* Return true if we have dynamic relocs that apply to read-only sections. */
5554
5555 static bfd_boolean
5556 readonly_dynrelocs (struct elf_link_hash_entry *h)
5557 {
5558 struct elf_dyn_relocs *p;
5559
5560 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5561 {
5562 asection *s = p->sec->output_section;
5563
5564 if (s != NULL
5565 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5566 == (SEC_READONLY | SEC_ALLOC)))
5567 return TRUE;
5568 }
5569 return FALSE;
5570 }
5571
5572 /* Adjust a symbol defined by a dynamic object and referenced by a
5573 regular object. The current definition is in some section of the
5574 dynamic object, but we're not including those sections. We have to
5575 change the definition to something the rest of the link can
5576 understand. */
5577
5578 static bfd_boolean
5579 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5580 struct elf_link_hash_entry *h)
5581 {
5582 struct ppc_elf_link_hash_table *htab;
5583 asection *s;
5584
5585 #ifdef DEBUG
5586 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5587 h->root.root.string);
5588 #endif
5589
5590 /* Make sure we know what is going on here. */
5591 htab = ppc_elf_hash_table (info);
5592 BFD_ASSERT (htab->elf.dynobj != NULL
5593 && (h->needs_plt
5594 || h->type == STT_GNU_IFUNC
5595 || h->u.weakdef != NULL
5596 || (h->def_dynamic
5597 && h->ref_regular
5598 && !h->def_regular)));
5599
5600 /* Deal with function syms. */
5601 if (h->type == STT_FUNC
5602 || h->type == STT_GNU_IFUNC
5603 || h->needs_plt)
5604 {
5605 /* Clear procedure linkage table information for any symbol that
5606 won't need a .plt entry. */
5607 struct plt_entry *ent;
5608 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5609 if (ent->plt.refcount > 0)
5610 break;
5611 if (ent == NULL
5612 || (h->type != STT_GNU_IFUNC
5613 && (SYMBOL_CALLS_LOCAL (info, h)
5614 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5615 && h->root.type == bfd_link_hash_undefweak))))
5616 {
5617 /* A PLT entry is not required/allowed when:
5618
5619 1. We are not using ld.so; because then the PLT entry
5620 can't be set up, so we can't use one. In this case,
5621 ppc_elf_adjust_dynamic_symbol won't even be called.
5622
5623 2. GC has rendered the entry unused.
5624
5625 3. We know for certain that a call to this symbol
5626 will go to this object, or will remain undefined. */
5627 h->plt.plist = NULL;
5628 h->needs_plt = 0;
5629 h->pointer_equality_needed = 0;
5630 }
5631 else
5632 {
5633 /* Taking a function's address in a read/write section
5634 doesn't require us to define the function symbol in the
5635 executable on a plt call stub. A dynamic reloc can
5636 be used instead. */
5637 if (h->pointer_equality_needed
5638 && h->type != STT_GNU_IFUNC
5639 && !htab->is_vxworks
5640 && !ppc_elf_hash_entry (h)->has_sda_refs
5641 && !readonly_dynrelocs (h))
5642 {
5643 h->pointer_equality_needed = 0;
5644 h->non_got_ref = 0;
5645 }
5646
5647 /* After adjust_dynamic_symbol, non_got_ref set in the
5648 non-shared case means that we have allocated space in
5649 .dynbss for the symbol and thus dyn_relocs for this
5650 symbol should be discarded.
5651 If we get here we know we are making a PLT entry for this
5652 symbol, and in an executable we'd normally resolve
5653 relocations against this symbol to the PLT entry. Allow
5654 dynamic relocs if the reference is weak, and the dynamic
5655 relocs will not cause text relocation. */
5656 else if (!h->ref_regular_nonweak
5657 && h->non_got_ref
5658 && h->type != STT_GNU_IFUNC
5659 && !htab->is_vxworks
5660 && !ppc_elf_hash_entry (h)->has_sda_refs
5661 && !readonly_dynrelocs (h))
5662 h->non_got_ref = 0;
5663 }
5664 h->protected_def = 0;
5665 return TRUE;
5666 }
5667 else
5668 h->plt.plist = NULL;
5669
5670 /* If this is a weak symbol, and there is a real definition, the
5671 processor independent code will have arranged for us to see the
5672 real definition first, and we can just use the same value. */
5673 if (h->u.weakdef != NULL)
5674 {
5675 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5676 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5677 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5678 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5679 if (ELIMINATE_COPY_RELOCS)
5680 h->non_got_ref = h->u.weakdef->non_got_ref;
5681 return TRUE;
5682 }
5683
5684 /* This is a reference to a symbol defined by a dynamic object which
5685 is not a function. */
5686
5687 /* If we are creating a shared library, we must presume that the
5688 only references to the symbol are via the global offset table.
5689 For such cases we need not do anything here; the relocations will
5690 be handled correctly by relocate_section. */
5691 if (bfd_link_pic (info))
5692 {
5693 h->protected_def = 0;
5694 return TRUE;
5695 }
5696
5697 /* If there are no references to this symbol that do not use the
5698 GOT, we don't need to generate a copy reloc. */
5699 if (!h->non_got_ref)
5700 {
5701 h->protected_def = 0;
5702 return TRUE;
5703 }
5704
5705 /* Protected variables do not work with .dynbss. The copy in
5706 .dynbss won't be used by the shared library with the protected
5707 definition for the variable. Editing to PIC, or text relocations
5708 are preferable to an incorrect program. */
5709 if (h->protected_def)
5710 {
5711 if (ELIMINATE_COPY_RELOCS
5712 && ppc_elf_hash_entry (h)->has_addr16_ha
5713 && ppc_elf_hash_entry (h)->has_addr16_lo
5714 && htab->params->pic_fixup == 0
5715 && info->disable_target_specific_optimizations <= 1)
5716 htab->params->pic_fixup = 1;
5717 h->non_got_ref = 0;
5718 return TRUE;
5719 }
5720
5721 /* If -z nocopyreloc was given, we won't generate them either. */
5722 if (info->nocopyreloc)
5723 {
5724 h->non_got_ref = 0;
5725 return TRUE;
5726 }
5727
5728 /* If we didn't find any dynamic relocs in read-only sections, then
5729 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5730 We can't do this if there are any small data relocations. This
5731 doesn't work on VxWorks, where we can not have dynamic
5732 relocations (other than copy and jump slot relocations) in an
5733 executable. */
5734 if (ELIMINATE_COPY_RELOCS
5735 && !ppc_elf_hash_entry (h)->has_sda_refs
5736 && !htab->is_vxworks
5737 && !h->def_regular
5738 && !readonly_dynrelocs (h))
5739 {
5740 h->non_got_ref = 0;
5741 return TRUE;
5742 }
5743
5744 /* We must allocate the symbol in our .dynbss section, which will
5745 become part of the .bss section of the executable. There will be
5746 an entry for this symbol in the .dynsym section. The dynamic
5747 object will contain position independent code, so all references
5748 from the dynamic object to this symbol will go through the global
5749 offset table. The dynamic linker will use the .dynsym entry to
5750 determine the address it must put in the global offset table, so
5751 both the dynamic object and the regular object will refer to the
5752 same memory location for the variable.
5753
5754 Of course, if the symbol is referenced using SDAREL relocs, we
5755 must instead allocate it in .sbss. */
5756
5757 if (ppc_elf_hash_entry (h)->has_sda_refs)
5758 s = htab->dynsbss;
5759 else
5760 s = htab->dynbss;
5761 BFD_ASSERT (s != NULL);
5762
5763 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5764 copy the initial value out of the dynamic object and into the
5765 runtime process image. We need to remember the offset into the
5766 .rela.bss section we are going to use. */
5767 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5768 {
5769 asection *srel;
5770
5771 if (ppc_elf_hash_entry (h)->has_sda_refs)
5772 srel = htab->relsbss;
5773 else
5774 srel = htab->relbss;
5775 BFD_ASSERT (srel != NULL);
5776 srel->size += sizeof (Elf32_External_Rela);
5777 h->needs_copy = 1;
5778 }
5779
5780 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5781 }
5782 \f
5783 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5784 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5785 specifying the addend on the plt relocation. For -fpic code, the sym
5786 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5787 xxxxxxxx.got2.plt_pic32.<callee>. */
5788
5789 static bfd_boolean
5790 add_stub_sym (struct plt_entry *ent,
5791 struct elf_link_hash_entry *h,
5792 struct bfd_link_info *info)
5793 {
5794 struct elf_link_hash_entry *sh;
5795 size_t len1, len2, len3;
5796 char *name;
5797 const char *stub;
5798 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5799
5800 if (bfd_link_pic (info))
5801 stub = ".plt_pic32.";
5802 else
5803 stub = ".plt_call32.";
5804
5805 len1 = strlen (h->root.root.string);
5806 len2 = strlen (stub);
5807 len3 = 0;
5808 if (ent->sec)
5809 len3 = strlen (ent->sec->name);
5810 name = bfd_malloc (len1 + len2 + len3 + 9);
5811 if (name == NULL)
5812 return FALSE;
5813 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5814 if (ent->sec)
5815 memcpy (name + 8, ent->sec->name, len3);
5816 memcpy (name + 8 + len3, stub, len2);
5817 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5818 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5819 if (sh == NULL)
5820 return FALSE;
5821 if (sh->root.type == bfd_link_hash_new)
5822 {
5823 sh->root.type = bfd_link_hash_defined;
5824 sh->root.u.def.section = htab->glink;
5825 sh->root.u.def.value = ent->glink_offset;
5826 sh->ref_regular = 1;
5827 sh->def_regular = 1;
5828 sh->ref_regular_nonweak = 1;
5829 sh->forced_local = 1;
5830 sh->non_elf = 0;
5831 sh->root.linker_def = 1;
5832 }
5833 return TRUE;
5834 }
5835
5836 /* Allocate NEED contiguous space in .got, and return the offset.
5837 Handles allocation of the got header when crossing 32k. */
5838
5839 static bfd_vma
5840 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5841 {
5842 bfd_vma where;
5843 unsigned int max_before_header;
5844
5845 if (htab->plt_type == PLT_VXWORKS)
5846 {
5847 where = htab->got->size;
5848 htab->got->size += need;
5849 }
5850 else
5851 {
5852 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5853 if (need <= htab->got_gap)
5854 {
5855 where = max_before_header - htab->got_gap;
5856 htab->got_gap -= need;
5857 }
5858 else
5859 {
5860 if (htab->got->size + need > max_before_header
5861 && htab->got->size <= max_before_header)
5862 {
5863 htab->got_gap = max_before_header - htab->got->size;
5864 htab->got->size = max_before_header + htab->got_header_size;
5865 }
5866 where = htab->got->size;
5867 htab->got->size += need;
5868 }
5869 }
5870 return where;
5871 }
5872
5873 /* Allocate space in associated reloc sections for dynamic relocs. */
5874
5875 static bfd_boolean
5876 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5877 {
5878 struct bfd_link_info *info = inf;
5879 struct ppc_elf_link_hash_entry *eh;
5880 struct ppc_elf_link_hash_table *htab;
5881 struct elf_dyn_relocs *p;
5882
5883 if (h->root.type == bfd_link_hash_indirect)
5884 return TRUE;
5885
5886 htab = ppc_elf_hash_table (info);
5887 if (htab->elf.dynamic_sections_created
5888 || h->type == STT_GNU_IFUNC)
5889 {
5890 struct plt_entry *ent;
5891 bfd_boolean doneone = FALSE;
5892 bfd_vma plt_offset = 0, glink_offset = 0;
5893 bfd_boolean dyn;
5894
5895 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5896 if (ent->plt.refcount > 0)
5897 {
5898 /* Make sure this symbol is output as a dynamic symbol. */
5899 if (h->dynindx == -1
5900 && !h->forced_local
5901 && !h->def_regular
5902 && htab->elf.dynamic_sections_created)
5903 {
5904 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5905 return FALSE;
5906 }
5907
5908 dyn = htab->elf.dynamic_sections_created;
5909 if (bfd_link_pic (info)
5910 || h->type == STT_GNU_IFUNC
5911 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5912 {
5913 asection *s = htab->plt;
5914 if (!dyn || h->dynindx == -1)
5915 s = htab->iplt;
5916
5917 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5918 {
5919 if (!doneone)
5920 {
5921 plt_offset = s->size;
5922 s->size += 4;
5923 }
5924 ent->plt.offset = plt_offset;
5925
5926 s = htab->glink;
5927 if (!doneone || bfd_link_pic (info))
5928 {
5929 glink_offset = s->size;
5930 s->size += GLINK_ENTRY_SIZE;
5931 if (h == htab->tls_get_addr
5932 && !htab->params->no_tls_get_addr_opt)
5933 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5934 }
5935 if (!doneone
5936 && !bfd_link_pic (info)
5937 && h->def_dynamic
5938 && !h->def_regular)
5939 {
5940 h->root.u.def.section = s;
5941 h->root.u.def.value = glink_offset;
5942 }
5943 ent->glink_offset = glink_offset;
5944
5945 if (htab->params->emit_stub_syms
5946 && !add_stub_sym (ent, h, info))
5947 return FALSE;
5948 }
5949 else
5950 {
5951 if (!doneone)
5952 {
5953 /* If this is the first .plt entry, make room
5954 for the special first entry. */
5955 if (s->size == 0)
5956 s->size += htab->plt_initial_entry_size;
5957
5958 /* The PowerPC PLT is actually composed of two
5959 parts, the first part is 2 words (for a load
5960 and a jump), and then there is a remaining
5961 word available at the end. */
5962 plt_offset = (htab->plt_initial_entry_size
5963 + (htab->plt_slot_size
5964 * ((s->size
5965 - htab->plt_initial_entry_size)
5966 / htab->plt_entry_size)));
5967
5968 /* If this symbol is not defined in a regular
5969 file, and we are not generating a shared
5970 library, then set the symbol to this location
5971 in the .plt. This is to avoid text
5972 relocations, and is required to make
5973 function pointers compare as equal between
5974 the normal executable and the shared library. */
5975 if (! bfd_link_pic (info)
5976 && h->def_dynamic
5977 && !h->def_regular)
5978 {
5979 h->root.u.def.section = s;
5980 h->root.u.def.value = plt_offset;
5981 }
5982
5983 /* Make room for this entry. */
5984 s->size += htab->plt_entry_size;
5985 /* After the 8192nd entry, room for two entries
5986 is allocated. */
5987 if (htab->plt_type == PLT_OLD
5988 && (s->size - htab->plt_initial_entry_size)
5989 / htab->plt_entry_size
5990 > PLT_NUM_SINGLE_ENTRIES)
5991 s->size += htab->plt_entry_size;
5992 }
5993 ent->plt.offset = plt_offset;
5994 }
5995
5996 /* We also need to make an entry in the .rela.plt section. */
5997 if (!doneone)
5998 {
5999 if (!htab->elf.dynamic_sections_created
6000 || h->dynindx == -1)
6001 htab->reliplt->size += sizeof (Elf32_External_Rela);
6002 else
6003 {
6004 htab->relplt->size += sizeof (Elf32_External_Rela);
6005
6006 if (htab->plt_type == PLT_VXWORKS)
6007 {
6008 /* Allocate space for the unloaded relocations. */
6009 if (!bfd_link_pic (info)
6010 && htab->elf.dynamic_sections_created)
6011 {
6012 if (ent->plt.offset
6013 == (bfd_vma) htab->plt_initial_entry_size)
6014 {
6015 htab->srelplt2->size
6016 += (sizeof (Elf32_External_Rela)
6017 * VXWORKS_PLTRESOLVE_RELOCS);
6018 }
6019
6020 htab->srelplt2->size
6021 += (sizeof (Elf32_External_Rela)
6022 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6023 }
6024
6025 /* Every PLT entry has an associated GOT entry in
6026 .got.plt. */
6027 htab->sgotplt->size += 4;
6028 }
6029 }
6030 doneone = TRUE;
6031 }
6032 }
6033 else
6034 ent->plt.offset = (bfd_vma) -1;
6035 }
6036 else
6037 ent->plt.offset = (bfd_vma) -1;
6038
6039 if (!doneone)
6040 {
6041 h->plt.plist = NULL;
6042 h->needs_plt = 0;
6043 }
6044 }
6045 else
6046 {
6047 h->plt.plist = NULL;
6048 h->needs_plt = 0;
6049 }
6050
6051 eh = (struct ppc_elf_link_hash_entry *) h;
6052 if (eh->elf.got.refcount > 0
6053 || (ELIMINATE_COPY_RELOCS
6054 && !eh->elf.def_regular
6055 && eh->elf.protected_def
6056 && eh->has_addr16_ha
6057 && eh->has_addr16_lo
6058 && htab->params->pic_fixup > 0))
6059 {
6060 bfd_boolean dyn;
6061 unsigned int need;
6062
6063 /* Make sure this symbol is output as a dynamic symbol. */
6064 if (eh->elf.dynindx == -1
6065 && !eh->elf.forced_local
6066 && eh->elf.type != STT_GNU_IFUNC
6067 && htab->elf.dynamic_sections_created)
6068 {
6069 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
6070 return FALSE;
6071 }
6072
6073 need = 0;
6074 if ((eh->tls_mask & TLS_TLS) != 0)
6075 {
6076 if ((eh->tls_mask & TLS_LD) != 0)
6077 {
6078 if (!eh->elf.def_dynamic)
6079 /* We'll just use htab->tlsld_got.offset. This should
6080 always be the case. It's a little odd if we have
6081 a local dynamic reloc against a non-local symbol. */
6082 htab->tlsld_got.refcount += 1;
6083 else
6084 need += 8;
6085 }
6086 if ((eh->tls_mask & TLS_GD) != 0)
6087 need += 8;
6088 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6089 need += 4;
6090 if ((eh->tls_mask & TLS_DTPREL) != 0)
6091 need += 4;
6092 }
6093 else
6094 need += 4;
6095 if (need == 0)
6096 eh->elf.got.offset = (bfd_vma) -1;
6097 else
6098 {
6099 eh->elf.got.offset = allocate_got (htab, need);
6100 dyn = htab->elf.dynamic_sections_created;
6101 if ((bfd_link_pic (info)
6102 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
6103 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
6104 || eh->elf.root.type != bfd_link_hash_undefweak))
6105 {
6106 asection *rsec = htab->relgot;
6107
6108 if (eh->elf.type == STT_GNU_IFUNC)
6109 rsec = htab->reliplt;
6110 /* All the entries we allocated need relocs.
6111 Except LD only needs one. */
6112 if ((eh->tls_mask & TLS_LD) != 0
6113 && eh->elf.def_dynamic)
6114 need -= 4;
6115 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6116 }
6117 }
6118 }
6119 else
6120 eh->elf.got.offset = (bfd_vma) -1;
6121
6122 if (eh->dyn_relocs == NULL
6123 || !htab->elf.dynamic_sections_created)
6124 return TRUE;
6125
6126 /* In the shared -Bsymbolic case, discard space allocated for
6127 dynamic pc-relative relocs against symbols which turn out to be
6128 defined in regular objects. For the normal shared case, discard
6129 space for relocs that have become local due to symbol visibility
6130 changes. */
6131
6132 if (bfd_link_pic (info))
6133 {
6134 /* Relocs that use pc_count are those that appear on a call insn,
6135 or certain REL relocs (see must_be_dyn_reloc) that can be
6136 generated via assembly. We want calls to protected symbols to
6137 resolve directly to the function rather than going via the plt.
6138 If people want function pointer comparisons to work as expected
6139 then they should avoid writing weird assembly. */
6140 if (SYMBOL_CALLS_LOCAL (info, h))
6141 {
6142 struct elf_dyn_relocs **pp;
6143
6144 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6145 {
6146 p->count -= p->pc_count;
6147 p->pc_count = 0;
6148 if (p->count == 0)
6149 *pp = p->next;
6150 else
6151 pp = &p->next;
6152 }
6153 }
6154
6155 if (htab->is_vxworks)
6156 {
6157 struct elf_dyn_relocs **pp;
6158
6159 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6160 {
6161 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6162 *pp = p->next;
6163 else
6164 pp = &p->next;
6165 }
6166 }
6167
6168 /* Discard relocs on undefined symbols that must be local. */
6169 if (eh->dyn_relocs != NULL
6170 && h->root.type == bfd_link_hash_undefined
6171 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6172 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6173 eh->dyn_relocs = NULL;
6174
6175 /* Also discard relocs on undefined weak syms with non-default
6176 visibility. */
6177 if (eh->dyn_relocs != NULL
6178 && h->root.type == bfd_link_hash_undefweak)
6179 {
6180 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6181 eh->dyn_relocs = NULL;
6182
6183 /* Make sure undefined weak symbols are output as a dynamic
6184 symbol in PIEs. */
6185 else if (h->dynindx == -1
6186 && !h->forced_local
6187 && !h->def_regular)
6188 {
6189 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6190 return FALSE;
6191 }
6192 }
6193 }
6194 else if (ELIMINATE_COPY_RELOCS)
6195 {
6196 /* For the non-shared case, discard space for relocs against
6197 symbols which turn out to need copy relocs or are not
6198 dynamic. */
6199
6200 if (!h->non_got_ref
6201 && !h->def_regular
6202 && !(h->protected_def
6203 && eh->has_addr16_ha
6204 && eh->has_addr16_lo
6205 && htab->params->pic_fixup > 0))
6206 {
6207 /* Make sure this symbol is output as a dynamic symbol.
6208 Undefined weak syms won't yet be marked as dynamic. */
6209 if (h->dynindx == -1
6210 && !h->forced_local)
6211 {
6212 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6213 return FALSE;
6214 }
6215
6216 /* If that succeeded, we know we'll be keeping all the
6217 relocs. */
6218 if (h->dynindx != -1)
6219 goto keep;
6220 }
6221
6222 eh->dyn_relocs = NULL;
6223
6224 keep: ;
6225 }
6226
6227 /* Finally, allocate space. */
6228 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6229 {
6230 asection *sreloc = elf_section_data (p->sec)->sreloc;
6231 if (eh->elf.type == STT_GNU_IFUNC)
6232 sreloc = htab->reliplt;
6233 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6234 }
6235
6236 return TRUE;
6237 }
6238
6239 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6240 read-only sections. */
6241
6242 static bfd_boolean
6243 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6244 {
6245 if (h->root.type == bfd_link_hash_indirect)
6246 return TRUE;
6247
6248 if (readonly_dynrelocs (h))
6249 {
6250 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6251
6252 /* Not an error, just cut short the traversal. */
6253 return FALSE;
6254 }
6255 return TRUE;
6256 }
6257
6258 static const unsigned char glink_eh_frame_cie[] =
6259 {
6260 0, 0, 0, 16, /* length. */
6261 0, 0, 0, 0, /* id. */
6262 1, /* CIE version. */
6263 'z', 'R', 0, /* Augmentation string. */
6264 4, /* Code alignment. */
6265 0x7c, /* Data alignment. */
6266 65, /* RA reg. */
6267 1, /* Augmentation size. */
6268 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6269 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6270 };
6271
6272 /* Set the sizes of the dynamic sections. */
6273
6274 static bfd_boolean
6275 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6276 struct bfd_link_info *info)
6277 {
6278 struct ppc_elf_link_hash_table *htab;
6279 asection *s;
6280 bfd_boolean relocs;
6281 bfd *ibfd;
6282
6283 #ifdef DEBUG
6284 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6285 #endif
6286
6287 htab = ppc_elf_hash_table (info);
6288 BFD_ASSERT (htab->elf.dynobj != NULL);
6289
6290 if (elf_hash_table (info)->dynamic_sections_created)
6291 {
6292 /* Set the contents of the .interp section to the interpreter. */
6293 if (bfd_link_executable (info) && !info->nointerp)
6294 {
6295 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6296 BFD_ASSERT (s != NULL);
6297 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6298 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6299 }
6300 }
6301
6302 if (htab->plt_type == PLT_OLD)
6303 htab->got_header_size = 16;
6304 else if (htab->plt_type == PLT_NEW)
6305 htab->got_header_size = 12;
6306
6307 /* Set up .got offsets for local syms, and space for local dynamic
6308 relocs. */
6309 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6310 {
6311 bfd_signed_vma *local_got;
6312 bfd_signed_vma *end_local_got;
6313 struct plt_entry **local_plt;
6314 struct plt_entry **end_local_plt;
6315 char *lgot_masks;
6316 bfd_size_type locsymcount;
6317 Elf_Internal_Shdr *symtab_hdr;
6318
6319 if (!is_ppc_elf (ibfd))
6320 continue;
6321
6322 for (s = ibfd->sections; s != NULL; s = s->next)
6323 {
6324 struct ppc_dyn_relocs *p;
6325
6326 for (p = ((struct ppc_dyn_relocs *)
6327 elf_section_data (s)->local_dynrel);
6328 p != NULL;
6329 p = p->next)
6330 {
6331 if (!bfd_is_abs_section (p->sec)
6332 && bfd_is_abs_section (p->sec->output_section))
6333 {
6334 /* Input section has been discarded, either because
6335 it is a copy of a linkonce section or due to
6336 linker script /DISCARD/, so we'll be discarding
6337 the relocs too. */
6338 }
6339 else if (htab->is_vxworks
6340 && strcmp (p->sec->output_section->name,
6341 ".tls_vars") == 0)
6342 {
6343 /* Relocations in vxworks .tls_vars sections are
6344 handled specially by the loader. */
6345 }
6346 else if (p->count != 0)
6347 {
6348 asection *sreloc = elf_section_data (p->sec)->sreloc;
6349 if (p->ifunc)
6350 sreloc = htab->reliplt;
6351 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6352 if ((p->sec->output_section->flags
6353 & (SEC_READONLY | SEC_ALLOC))
6354 == (SEC_READONLY | SEC_ALLOC))
6355 info->flags |= DF_TEXTREL;
6356 }
6357 }
6358 }
6359
6360 local_got = elf_local_got_refcounts (ibfd);
6361 if (!local_got)
6362 continue;
6363
6364 symtab_hdr = &elf_symtab_hdr (ibfd);
6365 locsymcount = symtab_hdr->sh_info;
6366 end_local_got = local_got + locsymcount;
6367 local_plt = (struct plt_entry **) end_local_got;
6368 end_local_plt = local_plt + locsymcount;
6369 lgot_masks = (char *) end_local_plt;
6370
6371 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6372 if (*local_got > 0)
6373 {
6374 unsigned int need = 0;
6375 if ((*lgot_masks & TLS_TLS) != 0)
6376 {
6377 if ((*lgot_masks & TLS_GD) != 0)
6378 need += 8;
6379 if ((*lgot_masks & TLS_LD) != 0)
6380 htab->tlsld_got.refcount += 1;
6381 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6382 need += 4;
6383 if ((*lgot_masks & TLS_DTPREL) != 0)
6384 need += 4;
6385 }
6386 else
6387 need += 4;
6388 if (need == 0)
6389 *local_got = (bfd_vma) -1;
6390 else
6391 {
6392 *local_got = allocate_got (htab, need);
6393 if (bfd_link_pic (info))
6394 {
6395 asection *srel = htab->relgot;
6396 if ((*lgot_masks & PLT_IFUNC) != 0)
6397 srel = htab->reliplt;
6398 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6399 }
6400 }
6401 }
6402 else
6403 *local_got = (bfd_vma) -1;
6404
6405 if (htab->is_vxworks)
6406 continue;
6407
6408 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6409 for (; local_plt < end_local_plt; ++local_plt)
6410 {
6411 struct plt_entry *ent;
6412 bfd_boolean doneone = FALSE;
6413 bfd_vma plt_offset = 0, glink_offset = 0;
6414
6415 for (ent = *local_plt; ent != NULL; ent = ent->next)
6416 if (ent->plt.refcount > 0)
6417 {
6418 s = htab->iplt;
6419
6420 if (!doneone)
6421 {
6422 plt_offset = s->size;
6423 s->size += 4;
6424 }
6425 ent->plt.offset = plt_offset;
6426
6427 s = htab->glink;
6428 if (!doneone || bfd_link_pic (info))
6429 {
6430 glink_offset = s->size;
6431 s->size += GLINK_ENTRY_SIZE;
6432 }
6433 ent->glink_offset = glink_offset;
6434
6435 if (!doneone)
6436 {
6437 htab->reliplt->size += sizeof (Elf32_External_Rela);
6438 doneone = TRUE;
6439 }
6440 }
6441 else
6442 ent->plt.offset = (bfd_vma) -1;
6443 }
6444 }
6445
6446 /* Allocate space for global sym dynamic relocs. */
6447 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6448
6449 if (htab->tlsld_got.refcount > 0)
6450 {
6451 htab->tlsld_got.offset = allocate_got (htab, 8);
6452 if (bfd_link_pic (info))
6453 htab->relgot->size += sizeof (Elf32_External_Rela);
6454 }
6455 else
6456 htab->tlsld_got.offset = (bfd_vma) -1;
6457
6458 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6459 {
6460 unsigned int g_o_t = 32768;
6461
6462 /* If we haven't allocated the header, do so now. When we get here,
6463 for old plt/got the got size will be 0 to 32764 (not allocated),
6464 or 32780 to 65536 (header allocated). For new plt/got, the
6465 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6466 if (htab->got->size <= 32768)
6467 {
6468 g_o_t = htab->got->size;
6469 if (htab->plt_type == PLT_OLD)
6470 g_o_t += 4;
6471 htab->got->size += htab->got_header_size;
6472 }
6473
6474 htab->elf.hgot->root.u.def.value = g_o_t;
6475 }
6476 if (bfd_link_pic (info))
6477 {
6478 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6479
6480 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6481 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6482 }
6483 if (info->emitrelocations)
6484 {
6485 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6486
6487 if (sda != NULL && sda->ref_regular)
6488 sda->root.u.def.section->flags |= SEC_KEEP;
6489 sda = htab->sdata[1].sym;
6490 if (sda != NULL && sda->ref_regular)
6491 sda->root.u.def.section->flags |= SEC_KEEP;
6492 }
6493
6494 if (htab->glink != NULL
6495 && htab->glink->size != 0
6496 && htab->elf.dynamic_sections_created)
6497 {
6498 htab->glink_pltresolve = htab->glink->size;
6499 /* Space for the branch table. ??? We don't need entries for
6500 non-dynamic symbols in this table. This case can arise with
6501 static ifuncs or forced local ifuncs. */
6502 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6503 /* Pad out to align the start of PLTresolve. */
6504 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6505 ? 63 : 15);
6506 htab->glink->size += GLINK_PLTRESOLVE;
6507
6508 if (htab->params->emit_stub_syms)
6509 {
6510 struct elf_link_hash_entry *sh;
6511 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6512 TRUE, FALSE, FALSE);
6513 if (sh == NULL)
6514 return FALSE;
6515 if (sh->root.type == bfd_link_hash_new)
6516 {
6517 sh->root.type = bfd_link_hash_defined;
6518 sh->root.u.def.section = htab->glink;
6519 sh->root.u.def.value = htab->glink_pltresolve;
6520 sh->ref_regular = 1;
6521 sh->def_regular = 1;
6522 sh->ref_regular_nonweak = 1;
6523 sh->forced_local = 1;
6524 sh->non_elf = 0;
6525 sh->root.linker_def = 1;
6526 }
6527 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6528 TRUE, FALSE, FALSE);
6529 if (sh == NULL)
6530 return FALSE;
6531 if (sh->root.type == bfd_link_hash_new)
6532 {
6533 sh->root.type = bfd_link_hash_defined;
6534 sh->root.u.def.section = htab->glink;
6535 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6536 sh->ref_regular = 1;
6537 sh->def_regular = 1;
6538 sh->ref_regular_nonweak = 1;
6539 sh->forced_local = 1;
6540 sh->non_elf = 0;
6541 sh->root.linker_def = 1;
6542 }
6543 }
6544 }
6545
6546 if (htab->glink != NULL
6547 && htab->glink->size != 0
6548 && htab->glink_eh_frame != NULL
6549 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6550 && _bfd_elf_eh_frame_present (info))
6551 {
6552 s = htab->glink_eh_frame;
6553 s->size = sizeof (glink_eh_frame_cie) + 20;
6554 if (bfd_link_pic (info))
6555 {
6556 s->size += 4;
6557 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6558 s->size += 4;
6559 }
6560 }
6561
6562 /* We've now determined the sizes of the various dynamic sections.
6563 Allocate memory for them. */
6564 relocs = FALSE;
6565 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6566 {
6567 bfd_boolean strip_section = TRUE;
6568
6569 if ((s->flags & SEC_LINKER_CREATED) == 0)
6570 continue;
6571
6572 if (s == htab->plt
6573 || s == htab->got)
6574 {
6575 /* We'd like to strip these sections if they aren't needed, but if
6576 we've exported dynamic symbols from them we must leave them.
6577 It's too late to tell BFD to get rid of the symbols. */
6578 if (htab->elf.hplt != NULL)
6579 strip_section = FALSE;
6580 /* Strip this section if we don't need it; see the
6581 comment below. */
6582 }
6583 else if (s == htab->iplt
6584 || s == htab->glink
6585 || s == htab->glink_eh_frame
6586 || s == htab->sgotplt
6587 || s == htab->sbss
6588 || s == htab->dynbss
6589 || s == htab->dynsbss)
6590 {
6591 /* Strip these too. */
6592 }
6593 else if (s == htab->sdata[0].section
6594 || s == htab->sdata[1].section)
6595 {
6596 strip_section = (s->flags & SEC_KEEP) == 0;
6597 }
6598 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6599 ".rela"))
6600 {
6601 if (s->size != 0)
6602 {
6603 /* Remember whether there are any relocation sections. */
6604 relocs = TRUE;
6605
6606 /* We use the reloc_count field as a counter if we need
6607 to copy relocs into the output file. */
6608 s->reloc_count = 0;
6609 }
6610 }
6611 else
6612 {
6613 /* It's not one of our sections, so don't allocate space. */
6614 continue;
6615 }
6616
6617 if (s->size == 0 && strip_section)
6618 {
6619 /* If we don't need this section, strip it from the
6620 output file. This is mostly to handle .rela.bss and
6621 .rela.plt. We must create both sections in
6622 create_dynamic_sections, because they must be created
6623 before the linker maps input sections to output
6624 sections. The linker does that before
6625 adjust_dynamic_symbol is called, and it is that
6626 function which decides whether anything needs to go
6627 into these sections. */
6628 s->flags |= SEC_EXCLUDE;
6629 continue;
6630 }
6631
6632 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6633 continue;
6634
6635 /* Allocate memory for the section contents. */
6636 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6637 if (s->contents == NULL)
6638 return FALSE;
6639 }
6640
6641 if (htab->elf.dynamic_sections_created)
6642 {
6643 /* Add some entries to the .dynamic section. We fill in the
6644 values later, in ppc_elf_finish_dynamic_sections, but we
6645 must add the entries now so that we get the correct size for
6646 the .dynamic section. The DT_DEBUG entry is filled in by the
6647 dynamic linker and used by the debugger. */
6648 #define add_dynamic_entry(TAG, VAL) \
6649 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6650
6651 if (bfd_link_executable (info))
6652 {
6653 if (!add_dynamic_entry (DT_DEBUG, 0))
6654 return FALSE;
6655 }
6656
6657 if (htab->plt != NULL && htab->plt->size != 0)
6658 {
6659 if (!add_dynamic_entry (DT_PLTGOT, 0)
6660 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6661 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6662 || !add_dynamic_entry (DT_JMPREL, 0))
6663 return FALSE;
6664 }
6665
6666 if (htab->plt_type == PLT_NEW
6667 && htab->glink != NULL
6668 && htab->glink->size != 0)
6669 {
6670 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6671 return FALSE;
6672 if (!htab->params->no_tls_get_addr_opt
6673 && htab->tls_get_addr != NULL
6674 && htab->tls_get_addr->plt.plist != NULL
6675 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6676 return FALSE;
6677 }
6678
6679 if (relocs)
6680 {
6681 if (!add_dynamic_entry (DT_RELA, 0)
6682 || !add_dynamic_entry (DT_RELASZ, 0)
6683 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6684 return FALSE;
6685 }
6686
6687 /* If any dynamic relocs apply to a read-only section, then we
6688 need a DT_TEXTREL entry. */
6689 if ((info->flags & DF_TEXTREL) == 0)
6690 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6691 info);
6692
6693 if ((info->flags & DF_TEXTREL) != 0)
6694 {
6695 if (!add_dynamic_entry (DT_TEXTREL, 0))
6696 return FALSE;
6697 }
6698 if (htab->is_vxworks
6699 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6700 return FALSE;
6701 }
6702 #undef add_dynamic_entry
6703
6704 if (htab->glink_eh_frame != NULL
6705 && htab->glink_eh_frame->contents != NULL)
6706 {
6707 unsigned char *p = htab->glink_eh_frame->contents;
6708 bfd_vma val;
6709
6710 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6711 /* CIE length (rewrite in case little-endian). */
6712 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6713 p += sizeof (glink_eh_frame_cie);
6714 /* FDE length. */
6715 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6716 bfd_put_32 (htab->elf.dynobj, val, p);
6717 p += 4;
6718 /* CIE pointer. */
6719 val = p - htab->glink_eh_frame->contents;
6720 bfd_put_32 (htab->elf.dynobj, val, p);
6721 p += 4;
6722 /* Offset to .glink. Set later. */
6723 p += 4;
6724 /* .glink size. */
6725 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6726 p += 4;
6727 /* Augmentation. */
6728 p += 1;
6729
6730 if (bfd_link_pic (info)
6731 && htab->elf.dynamic_sections_created)
6732 {
6733 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6734 if (adv < 64)
6735 *p++ = DW_CFA_advance_loc + adv;
6736 else if (adv < 256)
6737 {
6738 *p++ = DW_CFA_advance_loc1;
6739 *p++ = adv;
6740 }
6741 else if (adv < 65536)
6742 {
6743 *p++ = DW_CFA_advance_loc2;
6744 bfd_put_16 (htab->elf.dynobj, adv, p);
6745 p += 2;
6746 }
6747 else
6748 {
6749 *p++ = DW_CFA_advance_loc4;
6750 bfd_put_32 (htab->elf.dynobj, adv, p);
6751 p += 4;
6752 }
6753 *p++ = DW_CFA_register;
6754 *p++ = 65;
6755 p++;
6756 *p++ = DW_CFA_advance_loc + 4;
6757 *p++ = DW_CFA_restore_extended;
6758 *p++ = 65;
6759 }
6760 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6761 == htab->glink_eh_frame->size);
6762 }
6763
6764 return TRUE;
6765 }
6766
6767 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6768 if it looks like nothing is using them. */
6769
6770 static void
6771 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6772 {
6773 struct elf_link_hash_entry *sda = lsect->sym;
6774
6775 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6776 {
6777 asection *s;
6778
6779 s = bfd_get_section_by_name (output_bfd, lsect->name);
6780 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6781 {
6782 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6783 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6784 {
6785 sda->def_regular = 0;
6786 /* This is somewhat magic. See elf_link_output_extsym. */
6787 sda->ref_dynamic = 1;
6788 sda->forced_local = 0;
6789 }
6790 }
6791 }
6792 }
6793
6794 void
6795 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6796 {
6797 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6798
6799 if (htab != NULL)
6800 {
6801 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6802 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6803 }
6804 }
6805
6806
6807 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6808
6809 static bfd_boolean
6810 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6811 {
6812 if (h->plt.plist != NULL
6813 && !h->def_regular
6814 && (!h->pointer_equality_needed
6815 || !h->ref_regular_nonweak))
6816 return FALSE;
6817
6818 return _bfd_elf_hash_symbol (h);
6819 }
6820 \f
6821 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6822
6823 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6824 used for some functions that are allowed to break the ABI). */
6825 static const int shared_stub_entry[] =
6826 {
6827 0x7c0802a6, /* mflr 0 */
6828 0x429f0005, /* bcl 20, 31, .Lxxx */
6829 0x7d8802a6, /* mflr 12 */
6830 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6831 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6832 0x7c0803a6, /* mtlr 0 */
6833 0x7d8903a6, /* mtctr 12 */
6834 0x4e800420, /* bctr */
6835 };
6836
6837 static const int stub_entry[] =
6838 {
6839 0x3d800000, /* lis 12,xxx@ha */
6840 0x398c0000, /* addi 12,12,xxx@l */
6841 0x7d8903a6, /* mtctr 12 */
6842 0x4e800420, /* bctr */
6843 };
6844
6845 struct ppc_elf_relax_info
6846 {
6847 unsigned int workaround_size;
6848 unsigned int picfixup_size;
6849 };
6850
6851 /* This function implements long branch trampolines, and the ppc476
6852 icache bug workaround. Any section needing trampolines or patch
6853 space for the workaround has its size extended so that we can
6854 add trampolines at the end of the section. */
6855
6856 static bfd_boolean
6857 ppc_elf_relax_section (bfd *abfd,
6858 asection *isec,
6859 struct bfd_link_info *link_info,
6860 bfd_boolean *again)
6861 {
6862 struct one_branch_fixup
6863 {
6864 struct one_branch_fixup *next;
6865 asection *tsec;
6866 /* Final link, can use the symbol offset. For a
6867 relocatable link we use the symbol's index. */
6868 bfd_vma toff;
6869 bfd_vma trampoff;
6870 };
6871
6872 Elf_Internal_Shdr *symtab_hdr;
6873 bfd_byte *contents = NULL;
6874 Elf_Internal_Sym *isymbuf = NULL;
6875 Elf_Internal_Rela *internal_relocs = NULL;
6876 Elf_Internal_Rela *irel, *irelend = NULL;
6877 struct one_branch_fixup *branch_fixups = NULL;
6878 struct ppc_elf_relax_info *relax_info = NULL;
6879 unsigned changes = 0;
6880 bfd_boolean workaround_change;
6881 struct ppc_elf_link_hash_table *htab;
6882 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6883 asection *got2;
6884 bfd_boolean maybe_pasted;
6885
6886 *again = FALSE;
6887
6888 /* No need to do anything with non-alloc or non-code sections. */
6889 if ((isec->flags & SEC_ALLOC) == 0
6890 || (isec->flags & SEC_CODE) == 0
6891 || (isec->flags & SEC_LINKER_CREATED) != 0
6892 || isec->size < 4)
6893 return TRUE;
6894
6895 /* We cannot represent the required PIC relocs in the output, so don't
6896 do anything. The linker doesn't support mixing -shared and -r
6897 anyway. */
6898 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6899 return TRUE;
6900
6901 htab = ppc_elf_hash_table (link_info);
6902 if (htab == NULL)
6903 return TRUE;
6904
6905 isec->size = (isec->size + 3) & -4;
6906 if (isec->rawsize == 0)
6907 isec->rawsize = isec->size;
6908 trampbase = isec->size;
6909
6910 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6911 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6912 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6913
6914 if (htab->params->ppc476_workaround
6915 || htab->params->pic_fixup > 0)
6916 {
6917 if (elf_section_data (isec)->sec_info == NULL)
6918 {
6919 elf_section_data (isec)->sec_info
6920 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6921 if (elf_section_data (isec)->sec_info == NULL)
6922 return FALSE;
6923 }
6924 relax_info = elf_section_data (isec)->sec_info;
6925 trampbase -= relax_info->workaround_size;
6926 }
6927
6928 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6929 || strcmp (isec->output_section->name, ".fini") == 0);
6930 /* Space for a branch around any trampolines. */
6931 trampoff = trampbase;
6932 if (maybe_pasted && trampbase == isec->rawsize)
6933 trampoff += 4;
6934
6935 symtab_hdr = &elf_symtab_hdr (abfd);
6936 picfixup_size = 0;
6937 if (htab->params->branch_trampolines
6938 || htab->params->pic_fixup > 0)
6939 {
6940 /* Get a copy of the native relocations. */
6941 if (isec->reloc_count != 0)
6942 {
6943 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6944 link_info->keep_memory);
6945 if (internal_relocs == NULL)
6946 goto error_return;
6947 }
6948
6949 got2 = bfd_get_section_by_name (abfd, ".got2");
6950
6951 irelend = internal_relocs + isec->reloc_count;
6952 for (irel = internal_relocs; irel < irelend; irel++)
6953 {
6954 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6955 bfd_vma toff, roff;
6956 asection *tsec;
6957 struct one_branch_fixup *f;
6958 size_t insn_offset = 0;
6959 bfd_vma max_branch_offset = 0, val;
6960 bfd_byte *hit_addr;
6961 unsigned long t0;
6962 struct elf_link_hash_entry *h;
6963 struct plt_entry **plist;
6964 unsigned char sym_type;
6965
6966 switch (r_type)
6967 {
6968 case R_PPC_REL24:
6969 case R_PPC_LOCAL24PC:
6970 case R_PPC_PLTREL24:
6971 max_branch_offset = 1 << 25;
6972 break;
6973
6974 case R_PPC_REL14:
6975 case R_PPC_REL14_BRTAKEN:
6976 case R_PPC_REL14_BRNTAKEN:
6977 max_branch_offset = 1 << 15;
6978 break;
6979
6980 case R_PPC_ADDR16_HA:
6981 if (htab->params->pic_fixup > 0)
6982 break;
6983 continue;
6984
6985 default:
6986 continue;
6987 }
6988
6989 /* Get the value of the symbol referred to by the reloc. */
6990 h = NULL;
6991 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6992 {
6993 /* A local symbol. */
6994 Elf_Internal_Sym *isym;
6995
6996 /* Read this BFD's local symbols. */
6997 if (isymbuf == NULL)
6998 {
6999 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7000 if (isymbuf == NULL)
7001 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7002 symtab_hdr->sh_info, 0,
7003 NULL, NULL, NULL);
7004 if (isymbuf == 0)
7005 goto error_return;
7006 }
7007 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7008 if (isym->st_shndx == SHN_UNDEF)
7009 tsec = bfd_und_section_ptr;
7010 else if (isym->st_shndx == SHN_ABS)
7011 tsec = bfd_abs_section_ptr;
7012 else if (isym->st_shndx == SHN_COMMON)
7013 tsec = bfd_com_section_ptr;
7014 else
7015 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7016
7017 toff = isym->st_value;
7018 sym_type = ELF_ST_TYPE (isym->st_info);
7019 }
7020 else
7021 {
7022 /* Global symbol handling. */
7023 unsigned long indx;
7024
7025 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7026 h = elf_sym_hashes (abfd)[indx];
7027
7028 while (h->root.type == bfd_link_hash_indirect
7029 || h->root.type == bfd_link_hash_warning)
7030 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7031
7032 if (h->root.type == bfd_link_hash_defined
7033 || h->root.type == bfd_link_hash_defweak)
7034 {
7035 tsec = h->root.u.def.section;
7036 toff = h->root.u.def.value;
7037 }
7038 else if (h->root.type == bfd_link_hash_undefined
7039 || h->root.type == bfd_link_hash_undefweak)
7040 {
7041 tsec = bfd_und_section_ptr;
7042 toff = bfd_link_relocatable (link_info) ? indx : 0;
7043 }
7044 else
7045 continue;
7046
7047 /* If this branch is to __tls_get_addr then we may later
7048 optimise away the call. We won't be needing a long-
7049 branch stub in that case. */
7050 if (bfd_link_executable (link_info)
7051 && h == htab->tls_get_addr
7052 && irel != internal_relocs)
7053 {
7054 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7055 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7056 unsigned int tls_mask = 0;
7057
7058 /* The previous reloc should be one of R_PPC_TLSGD or
7059 R_PPC_TLSLD, or for older object files, a reloc
7060 on the __tls_get_addr arg setup insn. Get tls
7061 mask bits from the symbol on that reloc. */
7062 if (t_symndx < symtab_hdr->sh_info)
7063 {
7064 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7065
7066 if (local_got_offsets != NULL)
7067 {
7068 struct plt_entry **local_plt = (struct plt_entry **)
7069 (local_got_offsets + symtab_hdr->sh_info);
7070 char *lgot_masks = (char *)
7071 (local_plt + symtab_hdr->sh_info);
7072 tls_mask = lgot_masks[t_symndx];
7073 }
7074 }
7075 else
7076 {
7077 struct elf_link_hash_entry *th
7078 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7079
7080 while (th->root.type == bfd_link_hash_indirect
7081 || th->root.type == bfd_link_hash_warning)
7082 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7083
7084 tls_mask
7085 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7086 }
7087
7088 /* The mask bits tell us if the call will be
7089 optimised away. */
7090 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7091 && (t_rtype == R_PPC_TLSGD
7092 || t_rtype == R_PPC_GOT_TLSGD16
7093 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7094 continue;
7095 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7096 && (t_rtype == R_PPC_TLSLD
7097 || t_rtype == R_PPC_GOT_TLSLD16
7098 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7099 continue;
7100 }
7101
7102 sym_type = h->type;
7103 }
7104
7105 if (r_type == R_PPC_ADDR16_HA)
7106 {
7107 if (h != NULL
7108 && !h->def_regular
7109 && h->protected_def
7110 && ppc_elf_hash_entry (h)->has_addr16_ha
7111 && ppc_elf_hash_entry (h)->has_addr16_lo)
7112 picfixup_size += 12;
7113 continue;
7114 }
7115
7116 /* The condition here under which we call find_plt_ent must
7117 match that in relocate_section. If we call find_plt_ent here
7118 but not in relocate_section, or vice versa, then the branch
7119 destination used here may be incorrect. */
7120 plist = NULL;
7121 if (h != NULL)
7122 {
7123 /* We know is_branch_reloc (r_type) is true. */
7124 if (h->type == STT_GNU_IFUNC
7125 || r_type == R_PPC_PLTREL24)
7126 plist = &h->plt.plist;
7127 }
7128 else if (sym_type == STT_GNU_IFUNC
7129 && elf_local_got_offsets (abfd) != NULL)
7130 {
7131 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7132 struct plt_entry **local_plt = (struct plt_entry **)
7133 (local_got_offsets + symtab_hdr->sh_info);
7134 plist = local_plt + ELF32_R_SYM (irel->r_info);
7135 }
7136 if (plist != NULL)
7137 {
7138 bfd_vma addend = 0;
7139 struct plt_entry *ent;
7140
7141 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7142 addend = irel->r_addend;
7143 ent = find_plt_ent (plist, got2, addend);
7144 if (ent != NULL)
7145 {
7146 if (htab->plt_type == PLT_NEW
7147 || h == NULL
7148 || !htab->elf.dynamic_sections_created
7149 || h->dynindx == -1)
7150 {
7151 tsec = htab->glink;
7152 toff = ent->glink_offset;
7153 }
7154 else
7155 {
7156 tsec = htab->plt;
7157 toff = ent->plt.offset;
7158 }
7159 }
7160 }
7161
7162 /* If the branch and target are in the same section, you have
7163 no hope of adding stubs. We'll error out later should the
7164 branch overflow. */
7165 if (tsec == isec)
7166 continue;
7167
7168 /* There probably isn't any reason to handle symbols in
7169 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7170 attribute for a code section, and we are only looking at
7171 branches. However, implement it correctly here as a
7172 reference for other target relax_section functions. */
7173 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7174 {
7175 /* At this stage in linking, no SEC_MERGE symbol has been
7176 adjusted, so all references to such symbols need to be
7177 passed through _bfd_merged_section_offset. (Later, in
7178 relocate_section, all SEC_MERGE symbols *except* for
7179 section symbols have been adjusted.)
7180
7181 gas may reduce relocations against symbols in SEC_MERGE
7182 sections to a relocation against the section symbol when
7183 the original addend was zero. When the reloc is against
7184 a section symbol we should include the addend in the
7185 offset passed to _bfd_merged_section_offset, since the
7186 location of interest is the original symbol. On the
7187 other hand, an access to "sym+addend" where "sym" is not
7188 a section symbol should not include the addend; Such an
7189 access is presumed to be an offset from "sym"; The
7190 location of interest is just "sym". */
7191 if (sym_type == STT_SECTION)
7192 toff += irel->r_addend;
7193
7194 toff
7195 = _bfd_merged_section_offset (abfd, &tsec,
7196 elf_section_data (tsec)->sec_info,
7197 toff);
7198
7199 if (sym_type != STT_SECTION)
7200 toff += irel->r_addend;
7201 }
7202 /* PLTREL24 addends are special. */
7203 else if (r_type != R_PPC_PLTREL24)
7204 toff += irel->r_addend;
7205
7206 /* Attempted -shared link of non-pic code loses. */
7207 if ((!bfd_link_relocatable (link_info)
7208 && tsec == bfd_und_section_ptr)
7209 || tsec->output_section == NULL
7210 || (tsec->owner != NULL
7211 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7212 continue;
7213
7214 roff = irel->r_offset;
7215
7216 /* If the branch is in range, no need to do anything. */
7217 if (tsec != bfd_und_section_ptr
7218 && (!bfd_link_relocatable (link_info)
7219 /* A relocatable link may have sections moved during
7220 final link, so do not presume they remain in range. */
7221 || tsec->output_section == isec->output_section))
7222 {
7223 bfd_vma symaddr, reladdr;
7224
7225 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7226 reladdr = isec->output_section->vma + isec->output_offset + roff;
7227 if (symaddr - reladdr + max_branch_offset
7228 < 2 * max_branch_offset)
7229 continue;
7230 }
7231
7232 /* Look for an existing fixup to this address. */
7233 for (f = branch_fixups; f ; f = f->next)
7234 if (f->tsec == tsec && f->toff == toff)
7235 break;
7236
7237 if (f == NULL)
7238 {
7239 size_t size;
7240 unsigned long stub_rtype;
7241
7242 val = trampoff - roff;
7243 if (val >= max_branch_offset)
7244 /* Oh dear, we can't reach a trampoline. Don't try to add
7245 one. We'll report an error later. */
7246 continue;
7247
7248 if (bfd_link_pic (link_info))
7249 {
7250 size = 4 * ARRAY_SIZE (shared_stub_entry);
7251 insn_offset = 12;
7252 }
7253 else
7254 {
7255 size = 4 * ARRAY_SIZE (stub_entry);
7256 insn_offset = 0;
7257 }
7258 stub_rtype = R_PPC_RELAX;
7259 if (tsec == htab->plt
7260 || tsec == htab->glink)
7261 {
7262 stub_rtype = R_PPC_RELAX_PLT;
7263 if (r_type == R_PPC_PLTREL24)
7264 stub_rtype = R_PPC_RELAX_PLTREL24;
7265 }
7266
7267 /* Hijack the old relocation. Since we need two
7268 relocations for this use a "composite" reloc. */
7269 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7270 stub_rtype);
7271 irel->r_offset = trampoff + insn_offset;
7272 if (r_type == R_PPC_PLTREL24
7273 && stub_rtype != R_PPC_RELAX_PLTREL24)
7274 irel->r_addend = 0;
7275
7276 /* Record the fixup so we don't do it again this section. */
7277 f = bfd_malloc (sizeof (*f));
7278 f->next = branch_fixups;
7279 f->tsec = tsec;
7280 f->toff = toff;
7281 f->trampoff = trampoff;
7282 branch_fixups = f;
7283
7284 trampoff += size;
7285 changes++;
7286 }
7287 else
7288 {
7289 val = f->trampoff - roff;
7290 if (val >= max_branch_offset)
7291 continue;
7292
7293 /* Nop out the reloc, since we're finalizing things here. */
7294 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7295 }
7296
7297 /* Get the section contents. */
7298 if (contents == NULL)
7299 {
7300 /* Get cached copy if it exists. */
7301 if (elf_section_data (isec)->this_hdr.contents != NULL)
7302 contents = elf_section_data (isec)->this_hdr.contents;
7303 /* Go get them off disk. */
7304 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7305 goto error_return;
7306 }
7307
7308 /* Fix up the existing branch to hit the trampoline. */
7309 hit_addr = contents + roff;
7310 switch (r_type)
7311 {
7312 case R_PPC_REL24:
7313 case R_PPC_LOCAL24PC:
7314 case R_PPC_PLTREL24:
7315 t0 = bfd_get_32 (abfd, hit_addr);
7316 t0 &= ~0x3fffffc;
7317 t0 |= val & 0x3fffffc;
7318 bfd_put_32 (abfd, t0, hit_addr);
7319 break;
7320
7321 case R_PPC_REL14:
7322 case R_PPC_REL14_BRTAKEN:
7323 case R_PPC_REL14_BRNTAKEN:
7324 t0 = bfd_get_32 (abfd, hit_addr);
7325 t0 &= ~0xfffc;
7326 t0 |= val & 0xfffc;
7327 bfd_put_32 (abfd, t0, hit_addr);
7328 break;
7329 }
7330 }
7331
7332 while (branch_fixups != NULL)
7333 {
7334 struct one_branch_fixup *f = branch_fixups;
7335 branch_fixups = branch_fixups->next;
7336 free (f);
7337 }
7338 }
7339
7340 workaround_change = FALSE;
7341 newsize = trampoff;
7342 if (htab->params->ppc476_workaround
7343 && (!bfd_link_relocatable (link_info)
7344 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7345 {
7346 bfd_vma addr, end_addr;
7347 unsigned int crossings;
7348 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7349
7350 addr = isec->output_section->vma + isec->output_offset;
7351 end_addr = addr + trampoff;
7352 addr &= -pagesize;
7353 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7354 if (crossings != 0)
7355 {
7356 /* Keep space aligned, to ensure the patch code itself does
7357 not cross a page. Don't decrease size calculated on a
7358 previous pass as otherwise we might never settle on a layout. */
7359 newsize = 15 - ((end_addr - 1) & 15);
7360 newsize += crossings * 16;
7361 if (relax_info->workaround_size < newsize)
7362 {
7363 relax_info->workaround_size = newsize;
7364 workaround_change = TRUE;
7365 }
7366 /* Ensure relocate_section is called. */
7367 isec->flags |= SEC_RELOC;
7368 }
7369 newsize = trampoff + relax_info->workaround_size;
7370 }
7371
7372 if (htab->params->pic_fixup > 0)
7373 {
7374 picfixup_size -= relax_info->picfixup_size;
7375 if (picfixup_size != 0)
7376 relax_info->picfixup_size += picfixup_size;
7377 newsize += relax_info->picfixup_size;
7378 }
7379
7380 if (changes != 0 || picfixup_size != 0 || workaround_change)
7381 isec->size = newsize;
7382
7383 if (isymbuf != NULL
7384 && symtab_hdr->contents != (unsigned char *) isymbuf)
7385 {
7386 if (! link_info->keep_memory)
7387 free (isymbuf);
7388 else
7389 {
7390 /* Cache the symbols for elf_link_input_bfd. */
7391 symtab_hdr->contents = (unsigned char *) isymbuf;
7392 }
7393 }
7394
7395 if (contents != NULL
7396 && elf_section_data (isec)->this_hdr.contents != contents)
7397 {
7398 if (!changes && !link_info->keep_memory)
7399 free (contents);
7400 else
7401 {
7402 /* Cache the section contents for elf_link_input_bfd. */
7403 elf_section_data (isec)->this_hdr.contents = contents;
7404 }
7405 }
7406
7407 changes += picfixup_size;
7408 if (changes != 0)
7409 {
7410 /* Append sufficient NOP relocs so we can write out relocation
7411 information for the trampolines. */
7412 Elf_Internal_Shdr *rel_hdr;
7413 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7414 * sizeof (*new_relocs));
7415 unsigned ix;
7416
7417 if (!new_relocs)
7418 goto error_return;
7419 memcpy (new_relocs, internal_relocs,
7420 isec->reloc_count * sizeof (*new_relocs));
7421 for (ix = changes; ix--;)
7422 {
7423 irel = new_relocs + ix + isec->reloc_count;
7424
7425 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7426 }
7427 if (internal_relocs != elf_section_data (isec)->relocs)
7428 free (internal_relocs);
7429 elf_section_data (isec)->relocs = new_relocs;
7430 isec->reloc_count += changes;
7431 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7432 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7433 }
7434 else if (internal_relocs != NULL
7435 && elf_section_data (isec)->relocs != internal_relocs)
7436 free (internal_relocs);
7437
7438 *again = changes != 0 || workaround_change;
7439 return TRUE;
7440
7441 error_return:
7442 while (branch_fixups != NULL)
7443 {
7444 struct one_branch_fixup *f = branch_fixups;
7445 branch_fixups = branch_fixups->next;
7446 free (f);
7447 }
7448 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7449 free (isymbuf);
7450 if (contents != NULL
7451 && elf_section_data (isec)->this_hdr.contents != contents)
7452 free (contents);
7453 if (internal_relocs != NULL
7454 && elf_section_data (isec)->relocs != internal_relocs)
7455 free (internal_relocs);
7456 return FALSE;
7457 }
7458 \f
7459 /* What to do when ld finds relocations against symbols defined in
7460 discarded sections. */
7461
7462 static unsigned int
7463 ppc_elf_action_discarded (asection *sec)
7464 {
7465 if (strcmp (".fixup", sec->name) == 0)
7466 return 0;
7467
7468 if (strcmp (".got2", sec->name) == 0)
7469 return 0;
7470
7471 return _bfd_elf_default_action_discarded (sec);
7472 }
7473 \f
7474 /* Fill in the address for a pointer generated in a linker section. */
7475
7476 static bfd_vma
7477 elf_finish_pointer_linker_section (bfd *input_bfd,
7478 elf_linker_section_t *lsect,
7479 struct elf_link_hash_entry *h,
7480 bfd_vma relocation,
7481 const Elf_Internal_Rela *rel)
7482 {
7483 elf_linker_section_pointers_t *linker_section_ptr;
7484
7485 BFD_ASSERT (lsect != NULL);
7486
7487 if (h != NULL)
7488 {
7489 /* Handle global symbol. */
7490 struct ppc_elf_link_hash_entry *eh;
7491
7492 eh = (struct ppc_elf_link_hash_entry *) h;
7493 BFD_ASSERT (eh->elf.def_regular);
7494 linker_section_ptr = eh->linker_section_pointer;
7495 }
7496 else
7497 {
7498 /* Handle local symbol. */
7499 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7500
7501 BFD_ASSERT (is_ppc_elf (input_bfd));
7502 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7503 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7504 }
7505
7506 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7507 rel->r_addend,
7508 lsect);
7509 BFD_ASSERT (linker_section_ptr != NULL);
7510
7511 /* Offset will always be a multiple of four, so use the bottom bit
7512 as a "written" flag. */
7513 if ((linker_section_ptr->offset & 1) == 0)
7514 {
7515 bfd_put_32 (lsect->section->owner,
7516 relocation + linker_section_ptr->addend,
7517 lsect->section->contents + linker_section_ptr->offset);
7518 linker_section_ptr->offset += 1;
7519 }
7520
7521 relocation = (lsect->section->output_section->vma
7522 + lsect->section->output_offset
7523 + linker_section_ptr->offset - 1
7524 - SYM_VAL (lsect->sym));
7525
7526 #ifdef DEBUG
7527 fprintf (stderr,
7528 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7529 lsect->name, (long) relocation, (long) relocation);
7530 #endif
7531
7532 return relocation;
7533 }
7534
7535 #define PPC_LO(v) ((v) & 0xffff)
7536 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7537 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7538
7539 static void
7540 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7541 struct bfd_link_info *info)
7542 {
7543 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7544 bfd *output_bfd = info->output_bfd;
7545 bfd_vma plt;
7546
7547 plt = ((ent->plt.offset & ~1)
7548 + plt_sec->output_section->vma
7549 + plt_sec->output_offset);
7550
7551 if (bfd_link_pic (info))
7552 {
7553 bfd_vma got = 0;
7554
7555 if (ent->addend >= 32768)
7556 got = (ent->addend
7557 + ent->sec->output_section->vma
7558 + ent->sec->output_offset);
7559 else if (htab->elf.hgot != NULL)
7560 got = SYM_VAL (htab->elf.hgot);
7561
7562 plt -= got;
7563
7564 if (plt + 0x8000 < 0x10000)
7565 {
7566 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7567 p += 4;
7568 bfd_put_32 (output_bfd, MTCTR_11, p);
7569 p += 4;
7570 bfd_put_32 (output_bfd, BCTR, p);
7571 p += 4;
7572 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7573 p += 4;
7574 }
7575 else
7576 {
7577 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7578 p += 4;
7579 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7580 p += 4;
7581 bfd_put_32 (output_bfd, MTCTR_11, p);
7582 p += 4;
7583 bfd_put_32 (output_bfd, BCTR, p);
7584 p += 4;
7585 }
7586 }
7587 else
7588 {
7589 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7590 p += 4;
7591 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7592 p += 4;
7593 bfd_put_32 (output_bfd, MTCTR_11, p);
7594 p += 4;
7595 bfd_put_32 (output_bfd, BCTR, p);
7596 p += 4;
7597 }
7598 }
7599
7600 /* Return true if symbol is defined statically. */
7601
7602 static bfd_boolean
7603 is_static_defined (struct elf_link_hash_entry *h)
7604 {
7605 return ((h->root.type == bfd_link_hash_defined
7606 || h->root.type == bfd_link_hash_defweak)
7607 && h->root.u.def.section != NULL
7608 && h->root.u.def.section->output_section != NULL);
7609 }
7610
7611 /* If INSN is an opcode that may be used with an @tls operand, return
7612 the transformed insn for TLS optimisation, otherwise return 0. If
7613 REG is non-zero only match an insn with RB or RA equal to REG. */
7614
7615 unsigned int
7616 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7617 {
7618 unsigned int rtra;
7619
7620 if ((insn & (0x3f << 26)) != 31 << 26)
7621 return 0;
7622
7623 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7624 rtra = insn & ((1 << 26) - (1 << 16));
7625 else if (((insn >> 16) & 0x1f) == reg)
7626 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7627 else
7628 return 0;
7629
7630 if ((insn & (0x3ff << 1)) == 266 << 1)
7631 /* add -> addi. */
7632 insn = 14 << 26;
7633 else if ((insn & (0x1f << 1)) == 23 << 1
7634 && ((insn & (0x1f << 6)) < 14 << 6
7635 || ((insn & (0x1f << 6)) >= 16 << 6
7636 && (insn & (0x1f << 6)) < 24 << 6)))
7637 /* load and store indexed -> dform. */
7638 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7639 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7640 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7641 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7642 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7643 /* lwax -> lwa. */
7644 insn = (58 << 26) | 2;
7645 else
7646 return 0;
7647 insn |= rtra;
7648 return insn;
7649 }
7650
7651 /* If INSN is an opcode that may be used with an @tprel operand, return
7652 the transformed insn for an undefined weak symbol, ie. with the
7653 thread pointer REG operand removed. Otherwise return 0. */
7654
7655 unsigned int
7656 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7657 {
7658 if ((insn & (0x1f << 16)) == reg << 16
7659 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7660 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7661 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7662 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7663 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7664 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7665 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7666 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7667 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7668 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7669 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7670 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7671 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7672 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7673 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7674 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7675 && (insn & 3) != 1)
7676 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7677 && ((insn & 3) == 0 || (insn & 3) == 3))))
7678 {
7679 insn &= ~(0x1f << 16);
7680 }
7681 else if ((insn & (0x1f << 21)) == reg << 21
7682 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7683 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7684 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7685 {
7686 insn &= ~(0x1f << 21);
7687 insn |= (insn & (0x1f << 16)) << 5;
7688 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7689 insn -= 2 >> 26; /* convert to ori,oris */
7690 }
7691 else
7692 insn = 0;
7693 return insn;
7694 }
7695
7696 static bfd_boolean
7697 is_insn_ds_form (unsigned int insn)
7698 {
7699 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7700 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7701 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7702 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7703 }
7704
7705 static bfd_boolean
7706 is_insn_dq_form (unsigned int insn)
7707 {
7708 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7709 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7710 && (insn & 3) == 1));
7711 }
7712
7713 /* The RELOCATE_SECTION function is called by the ELF backend linker
7714 to handle the relocations for a section.
7715
7716 The relocs are always passed as Rela structures; if the section
7717 actually uses Rel structures, the r_addend field will always be
7718 zero.
7719
7720 This function is responsible for adjust the section contents as
7721 necessary, and (if using Rela relocs and generating a
7722 relocatable output file) adjusting the reloc addend as
7723 necessary.
7724
7725 This function does not have to worry about setting the reloc
7726 address or the reloc symbol index.
7727
7728 LOCAL_SYMS is a pointer to the swapped in local symbols.
7729
7730 LOCAL_SECTIONS is an array giving the section in the input file
7731 corresponding to the st_shndx field of each local symbol.
7732
7733 The global hash table entry for the global symbols can be found
7734 via elf_sym_hashes (input_bfd).
7735
7736 When generating relocatable output, this function must handle
7737 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7738 going to be the section symbol corresponding to the output
7739 section, which means that the addend must be adjusted
7740 accordingly. */
7741
7742 static bfd_boolean
7743 ppc_elf_relocate_section (bfd *output_bfd,
7744 struct bfd_link_info *info,
7745 bfd *input_bfd,
7746 asection *input_section,
7747 bfd_byte *contents,
7748 Elf_Internal_Rela *relocs,
7749 Elf_Internal_Sym *local_syms,
7750 asection **local_sections)
7751 {
7752 Elf_Internal_Shdr *symtab_hdr;
7753 struct elf_link_hash_entry **sym_hashes;
7754 struct ppc_elf_link_hash_table *htab;
7755 Elf_Internal_Rela *rel;
7756 Elf_Internal_Rela *wrel;
7757 Elf_Internal_Rela *relend;
7758 Elf_Internal_Rela outrel;
7759 asection *got2;
7760 bfd_vma *local_got_offsets;
7761 bfd_boolean ret = TRUE;
7762 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7763 bfd_boolean is_vxworks_tls;
7764 unsigned int picfixup_size = 0;
7765 struct ppc_elf_relax_info *relax_info = NULL;
7766
7767 #ifdef DEBUG
7768 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7769 "%ld relocations%s",
7770 input_bfd, input_section,
7771 (long) input_section->reloc_count,
7772 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7773 #endif
7774
7775 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7776
7777 /* Initialize howto table if not already done. */
7778 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7779 ppc_elf_howto_init ();
7780
7781 htab = ppc_elf_hash_table (info);
7782 local_got_offsets = elf_local_got_offsets (input_bfd);
7783 symtab_hdr = &elf_symtab_hdr (input_bfd);
7784 sym_hashes = elf_sym_hashes (input_bfd);
7785 /* We have to handle relocations in vxworks .tls_vars sections
7786 specially, because the dynamic loader is 'weird'. */
7787 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7788 && !strcmp (input_section->output_section->name,
7789 ".tls_vars"));
7790 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7791 relax_info = elf_section_data (input_section)->sec_info;
7792 rel = wrel = relocs;
7793 relend = relocs + input_section->reloc_count;
7794 for (; rel < relend; wrel++, rel++)
7795 {
7796 enum elf_ppc_reloc_type r_type;
7797 bfd_vma addend;
7798 bfd_reloc_status_type r;
7799 Elf_Internal_Sym *sym;
7800 asection *sec;
7801 struct elf_link_hash_entry *h;
7802 const char *sym_name;
7803 reloc_howto_type *howto;
7804 unsigned long r_symndx;
7805 bfd_vma relocation;
7806 bfd_vma branch_bit, from;
7807 bfd_boolean unresolved_reloc;
7808 bfd_boolean warned;
7809 unsigned int tls_type, tls_mask, tls_gd;
7810 struct plt_entry **ifunc;
7811 struct reloc_howto_struct alt_howto;
7812
7813 again:
7814 r_type = ELF32_R_TYPE (rel->r_info);
7815 sym = NULL;
7816 sec = NULL;
7817 h = NULL;
7818 unresolved_reloc = FALSE;
7819 warned = FALSE;
7820 r_symndx = ELF32_R_SYM (rel->r_info);
7821
7822 if (r_symndx < symtab_hdr->sh_info)
7823 {
7824 sym = local_syms + r_symndx;
7825 sec = local_sections[r_symndx];
7826 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7827
7828 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7829 }
7830 else
7831 {
7832 bfd_boolean ignored;
7833
7834 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7835 r_symndx, symtab_hdr, sym_hashes,
7836 h, sec, relocation,
7837 unresolved_reloc, warned, ignored);
7838
7839 sym_name = h->root.root.string;
7840 }
7841
7842 if (sec != NULL && discarded_section (sec))
7843 {
7844 /* For relocs against symbols from removed linkonce sections,
7845 or sections discarded by a linker script, we just want the
7846 section contents zeroed. Avoid any special processing. */
7847 howto = NULL;
7848 if (r_type < R_PPC_max)
7849 howto = ppc_elf_howto_table[r_type];
7850
7851 _bfd_clear_contents (howto, input_bfd, input_section,
7852 contents + rel->r_offset);
7853 wrel->r_offset = rel->r_offset;
7854 wrel->r_info = 0;
7855 wrel->r_addend = 0;
7856
7857 /* For ld -r, remove relocations in debug sections against
7858 sections defined in discarded sections. Not done for
7859 non-debug to preserve relocs in .eh_frame which the
7860 eh_frame editing code expects to be present. */
7861 if (bfd_link_relocatable (info)
7862 && (input_section->flags & SEC_DEBUGGING))
7863 wrel--;
7864
7865 continue;
7866 }
7867
7868 if (bfd_link_relocatable (info))
7869 {
7870 if (got2 != NULL
7871 && r_type == R_PPC_PLTREL24
7872 && rel->r_addend != 0)
7873 {
7874 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7875 addend specifies the GOT pointer offset within .got2. */
7876 rel->r_addend += got2->output_offset;
7877 }
7878 if (r_type != R_PPC_RELAX_PLT
7879 && r_type != R_PPC_RELAX_PLTREL24
7880 && r_type != R_PPC_RELAX)
7881 goto copy_reloc;
7882 }
7883
7884 /* TLS optimizations. Replace instruction sequences and relocs
7885 based on information we collected in tls_optimize. We edit
7886 RELOCS so that --emit-relocs will output something sensible
7887 for the final instruction stream. */
7888 tls_mask = 0;
7889 tls_gd = 0;
7890 if (h != NULL)
7891 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7892 else if (local_got_offsets != NULL)
7893 {
7894 struct plt_entry **local_plt;
7895 char *lgot_masks;
7896 local_plt
7897 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7898 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7899 tls_mask = lgot_masks[r_symndx];
7900 }
7901
7902 /* Ensure reloc mapping code below stays sane. */
7903 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7904 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7905 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7906 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7907 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7908 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7909 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7910 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7911 abort ();
7912 switch (r_type)
7913 {
7914 default:
7915 break;
7916
7917 case R_PPC_GOT_TPREL16:
7918 case R_PPC_GOT_TPREL16_LO:
7919 if ((tls_mask & TLS_TLS) != 0
7920 && (tls_mask & TLS_TPREL) == 0)
7921 {
7922 bfd_vma insn;
7923
7924 insn = bfd_get_32 (output_bfd,
7925 contents + rel->r_offset - d_offset);
7926 insn &= 31 << 21;
7927 insn |= 0x3c020000; /* addis 0,2,0 */
7928 bfd_put_32 (output_bfd, insn,
7929 contents + rel->r_offset - d_offset);
7930 r_type = R_PPC_TPREL16_HA;
7931 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7932 }
7933 break;
7934
7935 case R_PPC_TLS:
7936 if ((tls_mask & TLS_TLS) != 0
7937 && (tls_mask & TLS_TPREL) == 0)
7938 {
7939 bfd_vma insn;
7940
7941 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7942 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7943 if (insn == 0)
7944 abort ();
7945 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7946 r_type = R_PPC_TPREL16_LO;
7947 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7948
7949 /* Was PPC_TLS which sits on insn boundary, now
7950 PPC_TPREL16_LO which is at low-order half-word. */
7951 rel->r_offset += d_offset;
7952 }
7953 break;
7954
7955 case R_PPC_GOT_TLSGD16_HI:
7956 case R_PPC_GOT_TLSGD16_HA:
7957 tls_gd = TLS_TPRELGD;
7958 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7959 goto tls_gdld_hi;
7960 break;
7961
7962 case R_PPC_GOT_TLSLD16_HI:
7963 case R_PPC_GOT_TLSLD16_HA:
7964 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7965 {
7966 tls_gdld_hi:
7967 if ((tls_mask & tls_gd) != 0)
7968 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7969 + R_PPC_GOT_TPREL16);
7970 else
7971 {
7972 rel->r_offset -= d_offset;
7973 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7974 r_type = R_PPC_NONE;
7975 }
7976 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7977 }
7978 break;
7979
7980 case R_PPC_GOT_TLSGD16:
7981 case R_PPC_GOT_TLSGD16_LO:
7982 tls_gd = TLS_TPRELGD;
7983 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7984 goto tls_ldgd_opt;
7985 break;
7986
7987 case R_PPC_GOT_TLSLD16:
7988 case R_PPC_GOT_TLSLD16_LO:
7989 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7990 {
7991 unsigned int insn1, insn2;
7992 bfd_vma offset;
7993
7994 tls_ldgd_opt:
7995 offset = (bfd_vma) -1;
7996 /* If not using the newer R_PPC_TLSGD/LD to mark
7997 __tls_get_addr calls, we must trust that the call
7998 stays with its arg setup insns, ie. that the next
7999 reloc is the __tls_get_addr call associated with
8000 the current reloc. Edit both insns. */
8001 if (input_section->has_tls_get_addr_call
8002 && rel + 1 < relend
8003 && branch_reloc_hash_match (input_bfd, rel + 1,
8004 htab->tls_get_addr))
8005 offset = rel[1].r_offset;
8006 /* We read the low GOT_TLS insn because we need to keep
8007 the destination reg. It may be something other than
8008 the usual r3, and moved to r3 before the call by
8009 intervening code. */
8010 insn1 = bfd_get_32 (output_bfd,
8011 contents + rel->r_offset - d_offset);
8012 if ((tls_mask & tls_gd) != 0)
8013 {
8014 /* IE */
8015 insn1 &= (0x1f << 21) | (0x1f << 16);
8016 insn1 |= 32 << 26; /* lwz */
8017 if (offset != (bfd_vma) -1)
8018 {
8019 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8020 insn2 = 0x7c631214; /* add 3,3,2 */
8021 bfd_put_32 (output_bfd, insn2, contents + offset);
8022 }
8023 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8024 + R_PPC_GOT_TPREL16);
8025 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8026 }
8027 else
8028 {
8029 /* LE */
8030 insn1 &= 0x1f << 21;
8031 insn1 |= 0x3c020000; /* addis r,2,0 */
8032 if (tls_gd == 0)
8033 {
8034 /* Was an LD reloc. */
8035 for (r_symndx = 0;
8036 r_symndx < symtab_hdr->sh_info;
8037 r_symndx++)
8038 if (local_sections[r_symndx] == sec)
8039 break;
8040 if (r_symndx >= symtab_hdr->sh_info)
8041 r_symndx = STN_UNDEF;
8042 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8043 if (r_symndx != STN_UNDEF)
8044 rel->r_addend -= (local_syms[r_symndx].st_value
8045 + sec->output_offset
8046 + sec->output_section->vma);
8047 }
8048 r_type = R_PPC_TPREL16_HA;
8049 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8050 if (offset != (bfd_vma) -1)
8051 {
8052 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8053 rel[1].r_offset = offset + d_offset;
8054 rel[1].r_addend = rel->r_addend;
8055 insn2 = 0x38630000; /* addi 3,3,0 */
8056 bfd_put_32 (output_bfd, insn2, contents + offset);
8057 }
8058 }
8059 bfd_put_32 (output_bfd, insn1,
8060 contents + rel->r_offset - d_offset);
8061 if (tls_gd == 0)
8062 {
8063 /* We changed the symbol on an LD reloc. Start over
8064 in order to get h, sym, sec etc. right. */
8065 goto again;
8066 }
8067 }
8068 break;
8069
8070 case R_PPC_TLSGD:
8071 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8072 {
8073 unsigned int insn2;
8074 bfd_vma offset = rel->r_offset;
8075
8076 if ((tls_mask & TLS_TPRELGD) != 0)
8077 {
8078 /* IE */
8079 r_type = R_PPC_NONE;
8080 insn2 = 0x7c631214; /* add 3,3,2 */
8081 }
8082 else
8083 {
8084 /* LE */
8085 r_type = R_PPC_TPREL16_LO;
8086 rel->r_offset += d_offset;
8087 insn2 = 0x38630000; /* addi 3,3,0 */
8088 }
8089 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8090 bfd_put_32 (output_bfd, insn2, contents + offset);
8091 /* Zap the reloc on the _tls_get_addr call too. */
8092 BFD_ASSERT (offset == rel[1].r_offset);
8093 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8094 }
8095 break;
8096
8097 case R_PPC_TLSLD:
8098 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8099 {
8100 unsigned int insn2;
8101
8102 for (r_symndx = 0;
8103 r_symndx < symtab_hdr->sh_info;
8104 r_symndx++)
8105 if (local_sections[r_symndx] == sec)
8106 break;
8107 if (r_symndx >= symtab_hdr->sh_info)
8108 r_symndx = STN_UNDEF;
8109 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8110 if (r_symndx != STN_UNDEF)
8111 rel->r_addend -= (local_syms[r_symndx].st_value
8112 + sec->output_offset
8113 + sec->output_section->vma);
8114
8115 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8116 rel->r_offset += d_offset;
8117 insn2 = 0x38630000; /* addi 3,3,0 */
8118 bfd_put_32 (output_bfd, insn2,
8119 contents + rel->r_offset - d_offset);
8120 /* Zap the reloc on the _tls_get_addr call too. */
8121 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8122 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8123 goto again;
8124 }
8125 break;
8126 }
8127
8128 /* Handle other relocations that tweak non-addend part of insn. */
8129 branch_bit = 0;
8130 switch (r_type)
8131 {
8132 default:
8133 break;
8134
8135 /* Branch taken prediction relocations. */
8136 case R_PPC_ADDR14_BRTAKEN:
8137 case R_PPC_REL14_BRTAKEN:
8138 branch_bit = BRANCH_PREDICT_BIT;
8139 /* Fall thru */
8140
8141 /* Branch not taken prediction relocations. */
8142 case R_PPC_ADDR14_BRNTAKEN:
8143 case R_PPC_REL14_BRNTAKEN:
8144 {
8145 bfd_vma insn;
8146
8147 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8148 insn &= ~BRANCH_PREDICT_BIT;
8149 insn |= branch_bit;
8150
8151 from = (rel->r_offset
8152 + input_section->output_offset
8153 + input_section->output_section->vma);
8154
8155 /* Invert 'y' bit if not the default. */
8156 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8157 insn ^= BRANCH_PREDICT_BIT;
8158
8159 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8160 break;
8161 }
8162 }
8163
8164 if (ELIMINATE_COPY_RELOCS
8165 && h != NULL
8166 && !h->def_regular
8167 && h->protected_def
8168 && ppc_elf_hash_entry (h)->has_addr16_ha
8169 && ppc_elf_hash_entry (h)->has_addr16_lo
8170 && htab->params->pic_fixup > 0)
8171 {
8172 /* Convert lis;addi or lis;load/store accessing a protected
8173 variable defined in a shared library to PIC. */
8174 unsigned int insn;
8175
8176 if (r_type == R_PPC_ADDR16_HA)
8177 {
8178 insn = bfd_get_32 (output_bfd,
8179 contents + rel->r_offset - d_offset);
8180 if ((insn & (0x3f << 26)) == (15u << 26)
8181 && (insn & (0x1f << 16)) == 0 /* lis */)
8182 {
8183 bfd_byte *p;
8184 bfd_vma off;
8185 bfd_vma got_addr;
8186
8187 p = (contents + input_section->size
8188 - relax_info->workaround_size
8189 - relax_info->picfixup_size
8190 + picfixup_size);
8191 off = (p - contents) - (rel->r_offset - d_offset);
8192 if (off > 0x1fffffc || (off & 3) != 0)
8193 info->callbacks->einfo
8194 (_("%P: %H: fixup branch overflow\n"),
8195 input_bfd, input_section, rel->r_offset);
8196
8197 bfd_put_32 (output_bfd, B | off,
8198 contents + rel->r_offset - d_offset);
8199 got_addr = (htab->got->output_section->vma
8200 + htab->got->output_offset
8201 + (h->got.offset & ~1));
8202 wrel->r_offset = (p - contents) + d_offset;
8203 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8204 wrel->r_addend = got_addr;
8205 insn &= ~0xffff;
8206 insn |= ((unsigned int )(got_addr + 0x8000) >> 16) & 0xffff;
8207 bfd_put_32 (output_bfd, insn, p);
8208
8209 /* Convert lis to lwz, loading address from GOT. */
8210 insn &= ~0xffff;
8211 insn ^= (32u ^ 15u) << 26;
8212 insn |= (insn & (0x1f << 21)) >> 5;
8213 insn |= got_addr & 0xffff;
8214 bfd_put_32 (output_bfd, insn, p + 4);
8215
8216 bfd_put_32 (output_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8217 picfixup_size += 12;
8218
8219 /* Use one of the spare relocs, so --emit-relocs
8220 output is reasonable. */
8221 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8222 wrel++, rel++;
8223 rel->r_offset = wrel[-1].r_offset + 4;
8224 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8225 rel->r_addend = wrel[-1].r_addend;
8226
8227 /* Continue on as if we had a got reloc, to output
8228 dynamic reloc. */
8229 r_type = R_PPC_GOT16_LO;
8230 }
8231 else
8232 info->callbacks->einfo
8233 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8234 input_bfd, input_section, rel->r_offset,
8235 "R_PPC_ADDR16_HA", insn);
8236 }
8237 else if (r_type == R_PPC_ADDR16_LO)
8238 {
8239 insn = bfd_get_32 (output_bfd,
8240 contents + rel->r_offset - d_offset);
8241 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8242 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8243 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8244 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8245 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8246 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8247 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8248 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8249 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8250 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8251 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8252 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8253 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8254 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8255 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8256 && (insn & 3) != 1)
8257 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8258 && ((insn & 3) == 0 || (insn & 3) == 3)))
8259 {
8260 /* Arrange to apply the reloc addend, if any. */
8261 relocation = 0;
8262 unresolved_reloc = FALSE;
8263 rel->r_info = ELF32_R_INFO (0, r_type);
8264 }
8265 else
8266 info->callbacks->einfo
8267 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8268 input_bfd, input_section, rel->r_offset,
8269 "R_PPC_ADDR16_LO", insn);
8270 }
8271 }
8272
8273 ifunc = NULL;
8274 if (!htab->is_vxworks)
8275 {
8276 struct plt_entry *ent;
8277
8278 if (h != NULL)
8279 {
8280 if (h->type == STT_GNU_IFUNC)
8281 ifunc = &h->plt.plist;
8282 }
8283 else if (local_got_offsets != NULL
8284 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8285 {
8286 struct plt_entry **local_plt;
8287
8288 local_plt = (struct plt_entry **) (local_got_offsets
8289 + symtab_hdr->sh_info);
8290 ifunc = local_plt + r_symndx;
8291 }
8292
8293 ent = NULL;
8294 if (ifunc != NULL
8295 && (!bfd_link_pic (info)
8296 || is_branch_reloc (r_type)))
8297 {
8298 addend = 0;
8299 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8300 addend = rel->r_addend;
8301 ent = find_plt_ent (ifunc, got2, addend);
8302 }
8303 if (ent != NULL)
8304 {
8305 if (bfd_link_pic (info)
8306 && ent->sec != got2
8307 && htab->plt_type != PLT_NEW
8308 && (!htab->elf.dynamic_sections_created
8309 || h == NULL
8310 || h->dynindx == -1))
8311 {
8312 /* Uh oh, we are going to create a pic glink stub
8313 for an ifunc (here for h == NULL and later in
8314 finish_dynamic_symbol for h != NULL), and
8315 apparently are using code compiled with
8316 -mbss-plt. The difficulty is that -mbss-plt code
8317 gives no indication via a magic PLTREL24 addend
8318 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8319 is pointing into a .got2 section (and how far
8320 into .got2). */
8321 info->callbacks->einfo
8322 (_("%X%P: %H: unsupported bss-plt -fPIC ifunc %s\n"),
8323 input_bfd, input_section, rel->r_offset, sym_name);
8324 }
8325 if (h == NULL && (ent->plt.offset & 1) == 0)
8326 {
8327 Elf_Internal_Rela rela;
8328 bfd_byte *loc;
8329
8330 rela.r_offset = (htab->iplt->output_section->vma
8331 + htab->iplt->output_offset
8332 + ent->plt.offset);
8333 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8334 rela.r_addend = relocation;
8335 loc = htab->reliplt->contents;
8336 loc += (htab->reliplt->reloc_count++
8337 * sizeof (Elf32_External_Rela));
8338 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8339
8340 ent->plt.offset |= 1;
8341 }
8342 if (h == NULL && (ent->glink_offset & 1) == 0)
8343 {
8344 unsigned char *p = ((unsigned char *) htab->glink->contents
8345 + ent->glink_offset);
8346 write_glink_stub (ent, htab->iplt, p, info);
8347 ent->glink_offset |= 1;
8348 }
8349
8350 unresolved_reloc = FALSE;
8351 if (htab->plt_type == PLT_NEW
8352 || !htab->elf.dynamic_sections_created
8353 || h == NULL
8354 || h->dynindx == -1)
8355 relocation = (htab->glink->output_section->vma
8356 + htab->glink->output_offset
8357 + (ent->glink_offset & ~1));
8358 else
8359 relocation = (htab->plt->output_section->vma
8360 + htab->plt->output_offset
8361 + ent->plt.offset);
8362 }
8363 }
8364
8365 addend = rel->r_addend;
8366 tls_type = 0;
8367 howto = NULL;
8368 if (r_type < R_PPC_max)
8369 howto = ppc_elf_howto_table[r_type];
8370 switch (r_type)
8371 {
8372 default:
8373 info->callbacks->einfo
8374 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8375 input_bfd, (int) r_type, sym_name);
8376
8377 bfd_set_error (bfd_error_bad_value);
8378 ret = FALSE;
8379 goto copy_reloc;
8380
8381 case R_PPC_NONE:
8382 case R_PPC_TLS:
8383 case R_PPC_TLSGD:
8384 case R_PPC_TLSLD:
8385 case R_PPC_EMB_MRKREF:
8386 case R_PPC_GNU_VTINHERIT:
8387 case R_PPC_GNU_VTENTRY:
8388 goto copy_reloc;
8389
8390 /* GOT16 relocations. Like an ADDR16 using the symbol's
8391 address in the GOT as relocation value instead of the
8392 symbol's value itself. Also, create a GOT entry for the
8393 symbol and put the symbol value there. */
8394 case R_PPC_GOT_TLSGD16:
8395 case R_PPC_GOT_TLSGD16_LO:
8396 case R_PPC_GOT_TLSGD16_HI:
8397 case R_PPC_GOT_TLSGD16_HA:
8398 tls_type = TLS_TLS | TLS_GD;
8399 goto dogot;
8400
8401 case R_PPC_GOT_TLSLD16:
8402 case R_PPC_GOT_TLSLD16_LO:
8403 case R_PPC_GOT_TLSLD16_HI:
8404 case R_PPC_GOT_TLSLD16_HA:
8405 tls_type = TLS_TLS | TLS_LD;
8406 goto dogot;
8407
8408 case R_PPC_GOT_TPREL16:
8409 case R_PPC_GOT_TPREL16_LO:
8410 case R_PPC_GOT_TPREL16_HI:
8411 case R_PPC_GOT_TPREL16_HA:
8412 tls_type = TLS_TLS | TLS_TPREL;
8413 goto dogot;
8414
8415 case R_PPC_GOT_DTPREL16:
8416 case R_PPC_GOT_DTPREL16_LO:
8417 case R_PPC_GOT_DTPREL16_HI:
8418 case R_PPC_GOT_DTPREL16_HA:
8419 tls_type = TLS_TLS | TLS_DTPREL;
8420 goto dogot;
8421
8422 case R_PPC_GOT16:
8423 case R_PPC_GOT16_LO:
8424 case R_PPC_GOT16_HI:
8425 case R_PPC_GOT16_HA:
8426 tls_mask = 0;
8427 dogot:
8428 {
8429 /* Relocation is to the entry for this symbol in the global
8430 offset table. */
8431 bfd_vma off;
8432 bfd_vma *offp;
8433 unsigned long indx;
8434
8435 if (htab->got == NULL)
8436 abort ();
8437
8438 indx = 0;
8439 if (tls_type == (TLS_TLS | TLS_LD)
8440 && (h == NULL
8441 || !h->def_dynamic))
8442 offp = &htab->tlsld_got.offset;
8443 else if (h != NULL)
8444 {
8445 bfd_boolean dyn;
8446 dyn = htab->elf.dynamic_sections_created;
8447 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
8448 || (bfd_link_pic (info)
8449 && SYMBOL_REFERENCES_LOCAL (info, h)))
8450 /* This is actually a static link, or it is a
8451 -Bsymbolic link and the symbol is defined
8452 locally, or the symbol was forced to be local
8453 because of a version file. */
8454 ;
8455 else
8456 {
8457 BFD_ASSERT (h->dynindx != -1);
8458 indx = h->dynindx;
8459 unresolved_reloc = FALSE;
8460 }
8461 offp = &h->got.offset;
8462 }
8463 else
8464 {
8465 if (local_got_offsets == NULL)
8466 abort ();
8467 offp = &local_got_offsets[r_symndx];
8468 }
8469
8470 /* The offset must always be a multiple of 4. We use the
8471 least significant bit to record whether we have already
8472 processed this entry. */
8473 off = *offp;
8474 if ((off & 1) != 0)
8475 off &= ~1;
8476 else
8477 {
8478 unsigned int tls_m = (tls_mask
8479 & (TLS_LD | TLS_GD | TLS_DTPREL
8480 | TLS_TPREL | TLS_TPRELGD));
8481
8482 if (offp == &htab->tlsld_got.offset)
8483 tls_m = TLS_LD;
8484 else if (h == NULL
8485 || !h->def_dynamic)
8486 tls_m &= ~TLS_LD;
8487
8488 /* We might have multiple got entries for this sym.
8489 Initialize them all. */
8490 do
8491 {
8492 int tls_ty = 0;
8493
8494 if ((tls_m & TLS_LD) != 0)
8495 {
8496 tls_ty = TLS_TLS | TLS_LD;
8497 tls_m &= ~TLS_LD;
8498 }
8499 else if ((tls_m & TLS_GD) != 0)
8500 {
8501 tls_ty = TLS_TLS | TLS_GD;
8502 tls_m &= ~TLS_GD;
8503 }
8504 else if ((tls_m & TLS_DTPREL) != 0)
8505 {
8506 tls_ty = TLS_TLS | TLS_DTPREL;
8507 tls_m &= ~TLS_DTPREL;
8508 }
8509 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8510 {
8511 tls_ty = TLS_TLS | TLS_TPREL;
8512 tls_m = 0;
8513 }
8514
8515 /* Generate relocs for the dynamic linker. */
8516 if ((bfd_link_pic (info) || indx != 0)
8517 && (offp == &htab->tlsld_got.offset
8518 || h == NULL
8519 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8520 || h->root.type != bfd_link_hash_undefweak))
8521 {
8522 asection *rsec = htab->relgot;
8523 bfd_byte * loc;
8524
8525 if (ifunc != NULL)
8526 rsec = htab->reliplt;
8527 outrel.r_offset = (htab->got->output_section->vma
8528 + htab->got->output_offset
8529 + off);
8530 outrel.r_addend = 0;
8531 if (tls_ty & (TLS_LD | TLS_GD))
8532 {
8533 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8534 if (tls_ty == (TLS_TLS | TLS_GD))
8535 {
8536 loc = rsec->contents;
8537 loc += (rsec->reloc_count++
8538 * sizeof (Elf32_External_Rela));
8539 bfd_elf32_swap_reloca_out (output_bfd,
8540 &outrel, loc);
8541 outrel.r_offset += 4;
8542 outrel.r_info
8543 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8544 }
8545 }
8546 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8547 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8548 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8549 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8550 else if (indx != 0)
8551 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8552 else if (ifunc != NULL)
8553 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8554 else
8555 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8556 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8557 {
8558 outrel.r_addend += relocation;
8559 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8560 {
8561 if (htab->elf.tls_sec == NULL)
8562 outrel.r_addend = 0;
8563 else
8564 outrel.r_addend -= htab->elf.tls_sec->vma;
8565 }
8566 }
8567 loc = rsec->contents;
8568 loc += (rsec->reloc_count++
8569 * sizeof (Elf32_External_Rela));
8570 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8571 }
8572
8573 /* Init the .got section contents if we're not
8574 emitting a reloc. */
8575 else
8576 {
8577 bfd_vma value = relocation;
8578
8579 if (tls_ty == (TLS_TLS | TLS_LD))
8580 value = 1;
8581 else if (tls_ty != 0)
8582 {
8583 if (htab->elf.tls_sec == NULL)
8584 value = 0;
8585 else
8586 {
8587 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8588 if (tls_ty == (TLS_TLS | TLS_TPREL))
8589 value += DTP_OFFSET - TP_OFFSET;
8590 }
8591
8592 if (tls_ty == (TLS_TLS | TLS_GD))
8593 {
8594 bfd_put_32 (output_bfd, value,
8595 htab->got->contents + off + 4);
8596 value = 1;
8597 }
8598 }
8599 bfd_put_32 (output_bfd, value,
8600 htab->got->contents + off);
8601 }
8602
8603 off += 4;
8604 if (tls_ty & (TLS_LD | TLS_GD))
8605 off += 4;
8606 }
8607 while (tls_m != 0);
8608
8609 off = *offp;
8610 *offp = off | 1;
8611 }
8612
8613 if (off >= (bfd_vma) -2)
8614 abort ();
8615
8616 if ((tls_type & TLS_TLS) != 0)
8617 {
8618 if (tls_type != (TLS_TLS | TLS_LD))
8619 {
8620 if ((tls_mask & TLS_LD) != 0
8621 && !(h == NULL
8622 || !h->def_dynamic))
8623 off += 8;
8624 if (tls_type != (TLS_TLS | TLS_GD))
8625 {
8626 if ((tls_mask & TLS_GD) != 0)
8627 off += 8;
8628 if (tls_type != (TLS_TLS | TLS_DTPREL))
8629 {
8630 if ((tls_mask & TLS_DTPREL) != 0)
8631 off += 4;
8632 }
8633 }
8634 }
8635 }
8636
8637 /* If here for a picfixup, we're done. */
8638 if (r_type != ELF32_R_TYPE (rel->r_info))
8639 goto copy_reloc;
8640
8641 relocation = (htab->got->output_section->vma
8642 + htab->got->output_offset
8643 + off
8644 - SYM_VAL (htab->elf.hgot));
8645
8646 /* Addends on got relocations don't make much sense.
8647 x+off@got is actually x@got+off, and since the got is
8648 generated by a hash table traversal, the value in the
8649 got at entry m+n bears little relation to the entry m. */
8650 if (addend != 0)
8651 info->callbacks->einfo
8652 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8653 input_bfd, input_section, rel->r_offset,
8654 howto->name,
8655 sym_name);
8656 }
8657 break;
8658
8659 /* Relocations that need no special processing. */
8660 case R_PPC_LOCAL24PC:
8661 /* It makes no sense to point a local relocation
8662 at a symbol not in this object. */
8663 if (unresolved_reloc)
8664 {
8665 (*info->callbacks->undefined_symbol) (info,
8666 h->root.root.string,
8667 input_bfd,
8668 input_section,
8669 rel->r_offset,
8670 TRUE);
8671 goto copy_reloc;
8672 }
8673 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8674 {
8675 /* @local on an ifunc does not really make sense since
8676 the ifunc resolver can take you anywhere. More
8677 seriously, calls to ifuncs must go through a plt call
8678 stub, and for pic the plt call stubs uses r30 to
8679 access the PLT. The problem is that a call that is
8680 local won't have the +32k reloc addend trick marking
8681 -fPIC code, so the linker won't know whether r30 is
8682 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8683 info->callbacks->einfo (_("%X%P: %H: @local call to ifunc %s\n"),
8684 input_bfd, input_section, rel->r_offset,
8685 h->root.root.string);
8686 }
8687 break;
8688
8689 case R_PPC_DTPREL16:
8690 case R_PPC_DTPREL16_LO:
8691 case R_PPC_DTPREL16_HI:
8692 case R_PPC_DTPREL16_HA:
8693 if (htab->elf.tls_sec != NULL)
8694 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8695 break;
8696
8697 /* Relocations that may need to be propagated if this is a shared
8698 object. */
8699 case R_PPC_TPREL16:
8700 case R_PPC_TPREL16_LO:
8701 case R_PPC_TPREL16_HI:
8702 case R_PPC_TPREL16_HA:
8703 if (h != NULL
8704 && h->root.type == bfd_link_hash_undefweak
8705 && h->dynindx == -1)
8706 {
8707 /* Make this relocation against an undefined weak symbol
8708 resolve to zero. This is really just a tweak, since
8709 code using weak externs ought to check that they are
8710 defined before using them. */
8711 bfd_byte *p = contents + rel->r_offset - d_offset;
8712 unsigned int insn = bfd_get_32 (output_bfd, p);
8713 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8714 if (insn != 0)
8715 bfd_put_32 (output_bfd, insn, p);
8716 break;
8717 }
8718 if (htab->elf.tls_sec != NULL)
8719 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8720 /* The TPREL16 relocs shouldn't really be used in shared
8721 libs as they will result in DT_TEXTREL being set, but
8722 support them anyway. */
8723 goto dodyn;
8724
8725 case R_PPC_TPREL32:
8726 if (htab->elf.tls_sec != NULL)
8727 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8728 goto dodyn;
8729
8730 case R_PPC_DTPREL32:
8731 if (htab->elf.tls_sec != NULL)
8732 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8733 goto dodyn;
8734
8735 case R_PPC_DTPMOD32:
8736 relocation = 1;
8737 addend = 0;
8738 goto dodyn;
8739
8740 case R_PPC_REL16:
8741 case R_PPC_REL16_LO:
8742 case R_PPC_REL16_HI:
8743 case R_PPC_REL16_HA:
8744 case R_PPC_REL16DX_HA:
8745 break;
8746
8747 case R_PPC_REL32:
8748 if (h == NULL || h == htab->elf.hgot)
8749 break;
8750 /* fall through */
8751
8752 case R_PPC_ADDR32:
8753 case R_PPC_ADDR16:
8754 case R_PPC_ADDR16_LO:
8755 case R_PPC_ADDR16_HI:
8756 case R_PPC_ADDR16_HA:
8757 case R_PPC_UADDR32:
8758 case R_PPC_UADDR16:
8759 goto dodyn;
8760
8761 case R_PPC_VLE_REL8:
8762 case R_PPC_VLE_REL15:
8763 case R_PPC_VLE_REL24:
8764 case R_PPC_REL24:
8765 case R_PPC_REL14:
8766 case R_PPC_REL14_BRTAKEN:
8767 case R_PPC_REL14_BRNTAKEN:
8768 /* If these relocations are not to a named symbol, they can be
8769 handled right here, no need to bother the dynamic linker. */
8770 if (SYMBOL_CALLS_LOCAL (info, h)
8771 || h == htab->elf.hgot)
8772 break;
8773 /* fall through */
8774
8775 case R_PPC_ADDR24:
8776 case R_PPC_ADDR14:
8777 case R_PPC_ADDR14_BRTAKEN:
8778 case R_PPC_ADDR14_BRNTAKEN:
8779 if (h != NULL && !bfd_link_pic (info))
8780 break;
8781 /* fall through */
8782
8783 dodyn:
8784 if ((input_section->flags & SEC_ALLOC) == 0
8785 || is_vxworks_tls)
8786 break;
8787
8788 if ((bfd_link_pic (info)
8789 && !(h != NULL
8790 && ((h->root.type == bfd_link_hash_undefined
8791 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8792 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8793 || (h->root.type == bfd_link_hash_undefweak
8794 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8795 && (must_be_dyn_reloc (info, r_type)
8796 || !SYMBOL_CALLS_LOCAL (info, h)))
8797 || (ELIMINATE_COPY_RELOCS
8798 && !bfd_link_pic (info)
8799 && h != NULL
8800 && h->dynindx != -1
8801 && !h->non_got_ref
8802 && !h->def_regular
8803 && !(h->protected_def
8804 && ppc_elf_hash_entry (h)->has_addr16_ha
8805 && ppc_elf_hash_entry (h)->has_addr16_lo
8806 && htab->params->pic_fixup > 0)))
8807 {
8808 int skip;
8809 bfd_byte *loc;
8810 asection *sreloc;
8811 #ifdef DEBUG
8812 fprintf (stderr, "ppc_elf_relocate_section needs to "
8813 "create relocation for %s\n",
8814 (h && h->root.root.string
8815 ? h->root.root.string : "<unknown>"));
8816 #endif
8817
8818 /* When generating a shared object, these relocations
8819 are copied into the output file to be resolved at run
8820 time. */
8821 sreloc = elf_section_data (input_section)->sreloc;
8822 if (ifunc)
8823 sreloc = htab->reliplt;
8824 if (sreloc == NULL)
8825 return FALSE;
8826
8827 skip = 0;
8828 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8829 input_section,
8830 rel->r_offset);
8831 if (outrel.r_offset == (bfd_vma) -1
8832 || outrel.r_offset == (bfd_vma) -2)
8833 skip = (int) outrel.r_offset;
8834 outrel.r_offset += (input_section->output_section->vma
8835 + input_section->output_offset);
8836
8837 if (skip)
8838 memset (&outrel, 0, sizeof outrel);
8839 else if ((h != NULL
8840 && (h->root.type == bfd_link_hash_undefined
8841 || h->root.type == bfd_link_hash_undefweak))
8842 || !SYMBOL_REFERENCES_LOCAL (info, h))
8843 {
8844 BFD_ASSERT (h->dynindx != -1);
8845 unresolved_reloc = FALSE;
8846 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8847 outrel.r_addend = rel->r_addend;
8848 }
8849 else
8850 {
8851 outrel.r_addend = relocation + rel->r_addend;
8852
8853 if (r_type != R_PPC_ADDR32)
8854 {
8855 long indx = 0;
8856
8857 if (ifunc != NULL)
8858 {
8859 /* If we get here when building a static
8860 executable, then the libc startup function
8861 responsible for applying indirect function
8862 relocations is going to complain about
8863 the reloc type.
8864 If we get here when building a dynamic
8865 executable, it will be because we have
8866 a text relocation. The dynamic loader
8867 will set the text segment writable and
8868 non-executable to apply text relocations.
8869 So we'll segfault when trying to run the
8870 indirection function to resolve the reloc. */
8871 info->callbacks->einfo
8872 (_("%P: %H: relocation %s for indirect "
8873 "function %s unsupported\n"),
8874 input_bfd, input_section, rel->r_offset,
8875 howto->name,
8876 sym_name);
8877 ret = FALSE;
8878 }
8879 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8880 ;
8881 else if (sec == NULL || sec->owner == NULL)
8882 {
8883 bfd_set_error (bfd_error_bad_value);
8884 ret = FALSE;
8885 }
8886 else
8887 {
8888 asection *osec;
8889
8890 /* We are turning this relocation into one
8891 against a section symbol. It would be
8892 proper to subtract the symbol's value,
8893 osec->vma, from the emitted reloc addend,
8894 but ld.so expects buggy relocs.
8895 FIXME: Why not always use a zero index? */
8896 osec = sec->output_section;
8897 indx = elf_section_data (osec)->dynindx;
8898 if (indx == 0)
8899 {
8900 osec = htab->elf.text_index_section;
8901 indx = elf_section_data (osec)->dynindx;
8902 }
8903 BFD_ASSERT (indx != 0);
8904 #ifdef DEBUG
8905 if (indx == 0)
8906 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8907 indx, osec->name, osec->flags,
8908 h->root.root.string);
8909 #endif
8910 }
8911
8912 outrel.r_info = ELF32_R_INFO (indx, r_type);
8913 }
8914 else if (ifunc != NULL)
8915 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8916 else
8917 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8918 }
8919
8920 loc = sreloc->contents;
8921 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8922 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8923
8924 if (skip == -1)
8925 goto copy_reloc;
8926
8927 /* This reloc will be computed at runtime. We clear the memory
8928 so that it contains predictable value. */
8929 if (! skip
8930 && ((input_section->flags & SEC_ALLOC) != 0
8931 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8932 {
8933 relocation = howto->pc_relative ? outrel.r_offset : 0;
8934 addend = 0;
8935 break;
8936 }
8937 }
8938 break;
8939
8940 case R_PPC_RELAX_PLT:
8941 case R_PPC_RELAX_PLTREL24:
8942 if (h != NULL)
8943 {
8944 struct plt_entry *ent;
8945 bfd_vma got2_addend = 0;
8946
8947 if (r_type == R_PPC_RELAX_PLTREL24)
8948 {
8949 if (bfd_link_pic (info))
8950 got2_addend = addend;
8951 addend = 0;
8952 }
8953 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8954 if (htab->plt_type == PLT_NEW)
8955 relocation = (htab->glink->output_section->vma
8956 + htab->glink->output_offset
8957 + ent->glink_offset);
8958 else
8959 relocation = (htab->plt->output_section->vma
8960 + htab->plt->output_offset
8961 + ent->plt.offset);
8962 }
8963 /* Fall thru */
8964
8965 case R_PPC_RELAX:
8966 {
8967 const int *stub;
8968 size_t size;
8969 size_t insn_offset = rel->r_offset;
8970 unsigned int insn;
8971
8972 if (bfd_link_pic (info))
8973 {
8974 relocation -= (input_section->output_section->vma
8975 + input_section->output_offset
8976 + rel->r_offset - 4);
8977 stub = shared_stub_entry;
8978 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
8979 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
8980 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
8981 stub += 3;
8982 size = ARRAY_SIZE (shared_stub_entry) - 3;
8983 }
8984 else
8985 {
8986 stub = stub_entry;
8987 size = ARRAY_SIZE (stub_entry);
8988 }
8989
8990 relocation += addend;
8991 if (bfd_link_relocatable (info))
8992 relocation = 0;
8993
8994 /* First insn is HA, second is LO. */
8995 insn = *stub++;
8996 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8997 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8998 insn_offset += 4;
8999
9000 insn = *stub++;
9001 insn |= relocation & 0xffff;
9002 bfd_put_32 (output_bfd, insn, contents + insn_offset);
9003 insn_offset += 4;
9004 size -= 2;
9005
9006 while (size != 0)
9007 {
9008 insn = *stub++;
9009 --size;
9010 bfd_put_32 (output_bfd, insn, contents + insn_offset);
9011 insn_offset += 4;
9012 }
9013
9014 /* Rewrite the reloc and convert one of the trailing nop
9015 relocs to describe this relocation. */
9016 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9017 /* The relocs are at the bottom 2 bytes */
9018 wrel->r_offset = rel->r_offset + d_offset;
9019 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9020 wrel->r_addend = rel->r_addend;
9021 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9022 wrel++, rel++;
9023 wrel->r_offset += 4;
9024 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9025 }
9026 continue;
9027
9028 /* Indirect .sdata relocation. */
9029 case R_PPC_EMB_SDAI16:
9030 BFD_ASSERT (htab->sdata[0].section != NULL);
9031 if (!is_static_defined (htab->sdata[0].sym))
9032 {
9033 unresolved_reloc = TRUE;
9034 break;
9035 }
9036 relocation
9037 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9038 h, relocation, rel);
9039 addend = 0;
9040 break;
9041
9042 /* Indirect .sdata2 relocation. */
9043 case R_PPC_EMB_SDA2I16:
9044 BFD_ASSERT (htab->sdata[1].section != NULL);
9045 if (!is_static_defined (htab->sdata[1].sym))
9046 {
9047 unresolved_reloc = TRUE;
9048 break;
9049 }
9050 relocation
9051 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9052 h, relocation, rel);
9053 addend = 0;
9054 break;
9055
9056 /* Handle the TOC16 reloc. We want to use the offset within the .got
9057 section, not the actual VMA. This is appropriate when generating
9058 an embedded ELF object, for which the .got section acts like the
9059 AIX .toc section. */
9060 case R_PPC_TOC16: /* phony GOT16 relocations */
9061 if (sec == NULL || sec->output_section == NULL)
9062 {
9063 unresolved_reloc = TRUE;
9064 break;
9065 }
9066 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9067 ".got") == 0
9068 || strcmp (bfd_get_section_name (sec->owner, sec),
9069 ".cgot") == 0);
9070
9071 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9072 break;
9073
9074 case R_PPC_PLTREL24:
9075 if (h != NULL && ifunc == NULL)
9076 {
9077 struct plt_entry *ent;
9078
9079 ent = find_plt_ent (&h->plt.plist, got2,
9080 bfd_link_pic (info) ? addend : 0);
9081 if (ent == NULL
9082 || htab->plt == NULL)
9083 {
9084 /* We didn't make a PLT entry for this symbol. This
9085 happens when statically linking PIC code, or when
9086 using -Bsymbolic. */
9087 }
9088 else
9089 {
9090 /* Relocation is to the entry for this symbol in the
9091 procedure linkage table. */
9092 unresolved_reloc = FALSE;
9093 if (htab->plt_type == PLT_NEW)
9094 relocation = (htab->glink->output_section->vma
9095 + htab->glink->output_offset
9096 + ent->glink_offset);
9097 else
9098 relocation = (htab->plt->output_section->vma
9099 + htab->plt->output_offset
9100 + ent->plt.offset);
9101 }
9102 }
9103
9104 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9105 addend specifies the GOT pointer offset within .got2.
9106 Don't apply it to the relocation field. */
9107 addend = 0;
9108 break;
9109
9110 /* Relocate against _SDA_BASE_. */
9111 case R_PPC_SDAREL16:
9112 {
9113 const char *name;
9114 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9115
9116 if (sec == NULL
9117 || sec->output_section == NULL
9118 || !is_static_defined (sda))
9119 {
9120 unresolved_reloc = TRUE;
9121 break;
9122 }
9123 addend -= SYM_VAL (sda);
9124
9125 name = bfd_get_section_name (output_bfd, sec->output_section);
9126 if (!(strcmp (name, ".sdata") == 0
9127 || strcmp (name, ".sbss") == 0))
9128 {
9129 info->callbacks->einfo
9130 (_("%P: %B: the target (%s) of a %s relocation is "
9131 "in the wrong output section (%s)\n"),
9132 input_bfd,
9133 sym_name,
9134 howto->name,
9135 name);
9136 }
9137 }
9138 break;
9139
9140 /* Relocate against _SDA2_BASE_. */
9141 case R_PPC_EMB_SDA2REL:
9142 {
9143 const char *name;
9144 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9145
9146 if (sec == NULL
9147 || sec->output_section == NULL
9148 || !is_static_defined (sda))
9149 {
9150 unresolved_reloc = TRUE;
9151 break;
9152 }
9153 addend -= SYM_VAL (sda);
9154
9155 name = bfd_get_section_name (output_bfd, sec->output_section);
9156 if (!(strcmp (name, ".sdata2") == 0
9157 || strcmp (name, ".sbss2") == 0))
9158 {
9159 info->callbacks->einfo
9160 (_("%P: %B: the target (%s) of a %s relocation is "
9161 "in the wrong output section (%s)\n"),
9162 input_bfd,
9163 sym_name,
9164 howto->name,
9165 name);
9166 }
9167 }
9168 break;
9169
9170 case R_PPC_VLE_LO16A:
9171 relocation = relocation + addend;
9172 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9173 relocation, split16a_type);
9174 goto copy_reloc;
9175
9176 case R_PPC_VLE_LO16D:
9177 relocation = relocation + addend;
9178 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9179 relocation, split16d_type);
9180 goto copy_reloc;
9181
9182 case R_PPC_VLE_HI16A:
9183 relocation = (relocation + addend) >> 16;
9184 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9185 relocation, split16a_type);
9186 goto copy_reloc;
9187
9188 case R_PPC_VLE_HI16D:
9189 relocation = (relocation + addend) >> 16;
9190 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9191 relocation, split16d_type);
9192 goto copy_reloc;
9193
9194 case R_PPC_VLE_HA16A:
9195 relocation = (relocation + addend + 0x8000) >> 16;
9196 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9197 relocation, split16a_type);
9198 goto copy_reloc;
9199
9200 case R_PPC_VLE_HA16D:
9201 relocation = (relocation + addend + 0x8000) >> 16;
9202 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9203 relocation, split16d_type);
9204 goto copy_reloc;
9205
9206 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9207 case R_PPC_EMB_SDA21:
9208 case R_PPC_VLE_SDA21:
9209 case R_PPC_EMB_RELSDA:
9210 case R_PPC_VLE_SDA21_LO:
9211 {
9212 const char *name;
9213 int reg;
9214 unsigned int insn;
9215 struct elf_link_hash_entry *sda = NULL;
9216
9217 if (sec == NULL || sec->output_section == NULL)
9218 {
9219 unresolved_reloc = TRUE;
9220 break;
9221 }
9222
9223 name = bfd_get_section_name (output_bfd, sec->output_section);
9224 if (strcmp (name, ".sdata") == 0
9225 || strcmp (name, ".sbss") == 0)
9226 {
9227 reg = 13;
9228 sda = htab->sdata[0].sym;
9229 }
9230 else if (strcmp (name, ".sdata2") == 0
9231 || strcmp (name, ".sbss2") == 0)
9232 {
9233 reg = 2;
9234 sda = htab->sdata[1].sym;
9235 }
9236 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9237 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9238 {
9239 reg = 0;
9240 }
9241 else
9242 {
9243 info->callbacks->einfo
9244 (_("%P: %B: the target (%s) of a %s relocation is "
9245 "in the wrong output section (%s)\n"),
9246 input_bfd,
9247 sym_name,
9248 howto->name,
9249 name);
9250
9251 bfd_set_error (bfd_error_bad_value);
9252 ret = FALSE;
9253 goto copy_reloc;
9254 }
9255
9256 if (sda != NULL)
9257 {
9258 if (!is_static_defined (sda))
9259 {
9260 unresolved_reloc = TRUE;
9261 break;
9262 }
9263 addend -= SYM_VAL (sda);
9264 }
9265
9266 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9267 if (reg == 0
9268 && (r_type == R_PPC_VLE_SDA21
9269 || r_type == R_PPC_VLE_SDA21_LO))
9270 {
9271 relocation = relocation + addend;
9272 addend = 0;
9273
9274 /* Force e_li insn, keeping RT from original insn. */
9275 insn &= 0x1f << 21;
9276 insn |= 28u << 26;
9277
9278 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9279 /* Top 4 bits of value to 17..20. */
9280 insn |= (relocation & 0xf0000) >> 5;
9281 /* Next 5 bits of the value to 11..15. */
9282 insn |= (relocation & 0xf800) << 5;
9283 /* And the final 11 bits of the value to bits 21 to 31. */
9284 insn |= relocation & 0x7ff;
9285
9286 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9287
9288 if (r_type == R_PPC_VLE_SDA21
9289 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9290 goto overflow;
9291 goto copy_reloc;
9292 }
9293 else if (r_type == R_PPC_EMB_SDA21
9294 || r_type == R_PPC_VLE_SDA21
9295 || r_type == R_PPC_VLE_SDA21_LO)
9296 {
9297 /* Fill in register field. */
9298 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9299 }
9300 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9301 }
9302 break;
9303
9304 case R_PPC_VLE_SDAREL_LO16A:
9305 case R_PPC_VLE_SDAREL_LO16D:
9306 case R_PPC_VLE_SDAREL_HI16A:
9307 case R_PPC_VLE_SDAREL_HI16D:
9308 case R_PPC_VLE_SDAREL_HA16A:
9309 case R_PPC_VLE_SDAREL_HA16D:
9310 {
9311 bfd_vma value;
9312 const char *name;
9313 //int reg;
9314 struct elf_link_hash_entry *sda = NULL;
9315
9316 if (sec == NULL || sec->output_section == NULL)
9317 {
9318 unresolved_reloc = TRUE;
9319 break;
9320 }
9321
9322 name = bfd_get_section_name (output_bfd, sec->output_section);
9323 if (strcmp (name, ".sdata") == 0
9324 || strcmp (name, ".sbss") == 0)
9325 {
9326 //reg = 13;
9327 sda = htab->sdata[0].sym;
9328 }
9329 else if (strcmp (name, ".sdata2") == 0
9330 || strcmp (name, ".sbss2") == 0)
9331 {
9332 //reg = 2;
9333 sda = htab->sdata[1].sym;
9334 }
9335 else
9336 {
9337 (*_bfd_error_handler)
9338 (_("%B: the target (%s) of a %s relocation is "
9339 "in the wrong output section (%s)"),
9340 input_bfd,
9341 sym_name,
9342 howto->name,
9343 name);
9344
9345 bfd_set_error (bfd_error_bad_value);
9346 ret = FALSE;
9347 goto copy_reloc;
9348 }
9349
9350 if (sda != NULL)
9351 {
9352 if (!is_static_defined (sda))
9353 {
9354 unresolved_reloc = TRUE;
9355 break;
9356 }
9357 }
9358
9359 value = (sda->root.u.def.section->output_section->vma
9360 + sda->root.u.def.section->output_offset
9361 + addend);
9362
9363 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9364 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9365 value, split16a_type);
9366 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9367 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9368 value, split16d_type);
9369 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9370 {
9371 value = value >> 16;
9372 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9373 value, split16a_type);
9374 }
9375 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9376 {
9377 value = value >> 16;
9378 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9379 value, split16d_type);
9380 }
9381 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9382 {
9383 value = (value + 0x8000) >> 16;
9384 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9385 value, split16a_type);
9386 }
9387 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9388 {
9389 value = (value + 0x8000) >> 16;
9390 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9391 value, split16d_type);
9392 }
9393 }
9394 goto copy_reloc;
9395
9396 /* Relocate against the beginning of the section. */
9397 case R_PPC_SECTOFF:
9398 case R_PPC_SECTOFF_LO:
9399 case R_PPC_SECTOFF_HI:
9400 case R_PPC_SECTOFF_HA:
9401 if (sec == NULL || sec->output_section == NULL)
9402 {
9403 unresolved_reloc = TRUE;
9404 break;
9405 }
9406 addend -= sec->output_section->vma;
9407 break;
9408
9409 /* Negative relocations. */
9410 case R_PPC_EMB_NADDR32:
9411 case R_PPC_EMB_NADDR16:
9412 case R_PPC_EMB_NADDR16_LO:
9413 case R_PPC_EMB_NADDR16_HI:
9414 case R_PPC_EMB_NADDR16_HA:
9415 addend -= 2 * relocation;
9416 break;
9417
9418 case R_PPC_COPY:
9419 case R_PPC_GLOB_DAT:
9420 case R_PPC_JMP_SLOT:
9421 case R_PPC_RELATIVE:
9422 case R_PPC_IRELATIVE:
9423 case R_PPC_PLT32:
9424 case R_PPC_PLTREL32:
9425 case R_PPC_PLT16_LO:
9426 case R_PPC_PLT16_HI:
9427 case R_PPC_PLT16_HA:
9428 case R_PPC_ADDR30:
9429 case R_PPC_EMB_RELSEC16:
9430 case R_PPC_EMB_RELST_LO:
9431 case R_PPC_EMB_RELST_HI:
9432 case R_PPC_EMB_RELST_HA:
9433 case R_PPC_EMB_BIT_FLD:
9434 info->callbacks->einfo
9435 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9436 input_bfd,
9437 howto->name,
9438 sym_name);
9439
9440 bfd_set_error (bfd_error_invalid_operation);
9441 ret = FALSE;
9442 goto copy_reloc;
9443 }
9444
9445 /* Do any further special processing. */
9446 switch (r_type)
9447 {
9448 default:
9449 break;
9450
9451 case R_PPC_ADDR16_HA:
9452 case R_PPC_REL16_HA:
9453 case R_PPC_REL16DX_HA:
9454 case R_PPC_SECTOFF_HA:
9455 case R_PPC_TPREL16_HA:
9456 case R_PPC_DTPREL16_HA:
9457 case R_PPC_EMB_NADDR16_HA:
9458 case R_PPC_EMB_RELST_HA:
9459 /* It's just possible that this symbol is a weak symbol
9460 that's not actually defined anywhere. In that case,
9461 'sec' would be NULL, and we should leave the symbol
9462 alone (it will be set to zero elsewhere in the link). */
9463 if (sec == NULL)
9464 break;
9465 /* Fall thru */
9466
9467 case R_PPC_PLT16_HA:
9468 case R_PPC_GOT16_HA:
9469 case R_PPC_GOT_TLSGD16_HA:
9470 case R_PPC_GOT_TLSLD16_HA:
9471 case R_PPC_GOT_TPREL16_HA:
9472 case R_PPC_GOT_DTPREL16_HA:
9473 /* Add 0x10000 if sign bit in 0:15 is set.
9474 Bits 0:15 are not used. */
9475 addend += 0x8000;
9476 break;
9477
9478 case R_PPC_ADDR16:
9479 case R_PPC_ADDR16_LO:
9480 case R_PPC_GOT16:
9481 case R_PPC_GOT16_LO:
9482 case R_PPC_SDAREL16:
9483 case R_PPC_SECTOFF:
9484 case R_PPC_SECTOFF_LO:
9485 case R_PPC_DTPREL16:
9486 case R_PPC_DTPREL16_LO:
9487 case R_PPC_TPREL16:
9488 case R_PPC_TPREL16_LO:
9489 case R_PPC_GOT_TLSGD16:
9490 case R_PPC_GOT_TLSGD16_LO:
9491 case R_PPC_GOT_TLSLD16:
9492 case R_PPC_GOT_TLSLD16_LO:
9493 case R_PPC_GOT_DTPREL16:
9494 case R_PPC_GOT_DTPREL16_LO:
9495 case R_PPC_GOT_TPREL16:
9496 case R_PPC_GOT_TPREL16_LO:
9497 {
9498 /* The 32-bit ABI lacks proper relocations to deal with
9499 certain 64-bit instructions. Prevent damage to bits
9500 that make up part of the insn opcode. */
9501 unsigned int insn, mask, lobit;
9502
9503 insn = bfd_get_32 (output_bfd,
9504 contents + rel->r_offset - d_offset);
9505 mask = 0;
9506 if (is_insn_ds_form (insn))
9507 mask = 3;
9508 else if (is_insn_dq_form (insn))
9509 mask = 15;
9510 else
9511 break;
9512 relocation += addend;
9513 addend = insn & mask;
9514 lobit = mask & relocation;
9515 if (lobit != 0)
9516 {
9517 relocation ^= lobit;
9518 info->callbacks->einfo
9519 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9520 input_bfd, input_section, rel->r_offset,
9521 howto->name, sym_name, mask + 1);
9522 bfd_set_error (bfd_error_bad_value);
9523 ret = FALSE;
9524 }
9525 }
9526 break;
9527 }
9528
9529 #ifdef DEBUG
9530 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9531 "offset = %ld, addend = %ld\n",
9532 howto->name,
9533 (int) r_type,
9534 sym_name,
9535 r_symndx,
9536 (long) rel->r_offset,
9537 (long) addend);
9538 #endif
9539
9540 if (unresolved_reloc
9541 && !((input_section->flags & SEC_DEBUGGING) != 0
9542 && h->def_dynamic)
9543 && _bfd_elf_section_offset (output_bfd, info, input_section,
9544 rel->r_offset) != (bfd_vma) -1)
9545 {
9546 info->callbacks->einfo
9547 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9548 input_bfd, input_section, rel->r_offset,
9549 howto->name,
9550 sym_name);
9551 ret = FALSE;
9552 }
9553
9554 /* 16-bit fields in insns mostly have signed values, but a
9555 few insns have 16-bit unsigned values. Really, we should
9556 have different reloc types. */
9557 if (howto->complain_on_overflow != complain_overflow_dont
9558 && howto->dst_mask == 0xffff
9559 && (input_section->flags & SEC_CODE) != 0)
9560 {
9561 enum complain_overflow complain = complain_overflow_signed;
9562
9563 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9564 {
9565 unsigned int insn;
9566
9567 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9568 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9569 complain = complain_overflow_bitfield;
9570 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9571 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9572 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9573 complain = complain_overflow_unsigned;
9574 }
9575 if (howto->complain_on_overflow != complain)
9576 {
9577 alt_howto = *howto;
9578 alt_howto.complain_on_overflow = complain;
9579 howto = &alt_howto;
9580 }
9581 }
9582
9583 if (r_type == R_PPC_REL16DX_HA)
9584 {
9585 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9586 if (rel->r_offset + 4 > input_section->size)
9587 r = bfd_reloc_outofrange;
9588 else
9589 {
9590 unsigned int insn;
9591
9592 relocation += addend;
9593 relocation -= (rel->r_offset
9594 + input_section->output_offset
9595 + input_section->output_section->vma);
9596 relocation >>= 16;
9597 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9598 insn &= ~0x1fffc1;
9599 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9600 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9601 r = bfd_reloc_ok;
9602 }
9603 }
9604 else
9605 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9606 rel->r_offset, relocation, addend);
9607
9608 if (r != bfd_reloc_ok)
9609 {
9610 if (r == bfd_reloc_overflow)
9611 {
9612 overflow:
9613 /* On code like "if (foo) foo();" don't report overflow
9614 on a branch to zero when foo is undefined. */
9615 if (!warned
9616 && !(h != NULL
9617 && (h->root.type == bfd_link_hash_undefweak
9618 || h->root.type == bfd_link_hash_undefined)
9619 && is_branch_reloc (r_type)))
9620 info->callbacks->reloc_overflow
9621 (info, (h ? &h->root : NULL), sym_name, howto->name,
9622 rel->r_addend, input_bfd, input_section, rel->r_offset);
9623 }
9624 else
9625 {
9626 info->callbacks->einfo
9627 (_("%P: %H: %s reloc against `%s': error %d\n"),
9628 input_bfd, input_section, rel->r_offset,
9629 howto->name, sym_name, (int) r);
9630 ret = FALSE;
9631 }
9632 }
9633 copy_reloc:
9634 if (wrel != rel)
9635 *wrel = *rel;
9636 }
9637
9638 if (wrel != rel)
9639 {
9640 Elf_Internal_Shdr *rel_hdr;
9641 size_t deleted = rel - wrel;
9642
9643 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9644 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9645 if (rel_hdr->sh_size == 0)
9646 {
9647 /* It is too late to remove an empty reloc section. Leave
9648 one NONE reloc.
9649 ??? What is wrong with an empty section??? */
9650 rel_hdr->sh_size = rel_hdr->sh_entsize;
9651 deleted -= 1;
9652 wrel++;
9653 }
9654 relend = wrel;
9655 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9656 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9657 input_section->reloc_count -= deleted;
9658 }
9659
9660 #ifdef DEBUG
9661 fprintf (stderr, "\n");
9662 #endif
9663
9664 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9665 && input_section->size != input_section->rawsize
9666 && (strcmp (input_section->output_section->name, ".init") == 0
9667 || strcmp (input_section->output_section->name, ".fini") == 0))
9668 {
9669 /* Branch around the trampolines. */
9670 unsigned int insn = B + input_section->size - input_section->rawsize;
9671 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9672 }
9673
9674 if (htab->params->ppc476_workaround
9675 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9676 && (!bfd_link_relocatable (info)
9677 || (input_section->output_section->alignment_power
9678 >= htab->params->pagesize_p2)))
9679 {
9680 bfd_vma start_addr, end_addr, addr;
9681 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9682
9683 if (relax_info->workaround_size != 0)
9684 {
9685 bfd_byte *p;
9686 unsigned int n;
9687 bfd_byte fill[4];
9688
9689 bfd_put_32 (input_bfd, BA, fill);
9690 p = contents + input_section->size - relax_info->workaround_size;
9691 n = relax_info->workaround_size >> 2;
9692 while (n--)
9693 {
9694 memcpy (p, fill, 4);
9695 p += 4;
9696 }
9697 }
9698
9699 /* The idea is: Replace the last instruction on a page with a
9700 branch to a patch area. Put the insn there followed by a
9701 branch back to the next page. Complicated a little by
9702 needing to handle moved conditional branches, and by not
9703 wanting to touch data-in-text. */
9704
9705 start_addr = (input_section->output_section->vma
9706 + input_section->output_offset);
9707 end_addr = (start_addr + input_section->size
9708 - relax_info->workaround_size);
9709 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9710 addr < end_addr;
9711 addr += pagesize)
9712 {
9713 bfd_vma offset = addr - start_addr;
9714 Elf_Internal_Rela *lo, *hi;
9715 bfd_boolean is_data;
9716 bfd_vma patch_off, patch_addr;
9717 unsigned int insn;
9718
9719 /* Do we have a data reloc at this offset? If so, leave
9720 the word alone. */
9721 is_data = FALSE;
9722 lo = relocs;
9723 hi = relend;
9724 rel = NULL;
9725 while (lo < hi)
9726 {
9727 rel = lo + (hi - lo) / 2;
9728 if (rel->r_offset < offset)
9729 lo = rel + 1;
9730 else if (rel->r_offset > offset + 3)
9731 hi = rel;
9732 else
9733 {
9734 switch (ELF32_R_TYPE (rel->r_info))
9735 {
9736 case R_PPC_ADDR32:
9737 case R_PPC_UADDR32:
9738 case R_PPC_REL32:
9739 case R_PPC_ADDR30:
9740 is_data = TRUE;
9741 break;
9742 default:
9743 break;
9744 }
9745 break;
9746 }
9747 }
9748 if (is_data)
9749 continue;
9750
9751 /* Some instructions can be left alone too. Unconditional
9752 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9753 avoid the icache failure.
9754
9755 The problem occurs due to prefetch across a page boundary
9756 where stale instructions can be fetched from the next
9757 page, and the mechanism for flushing these bad
9758 instructions fails under certain circumstances. The
9759 unconditional branches:
9760 1) Branch: b, bl, ba, bla,
9761 2) Branch Conditional: bc, bca, bcl, bcla,
9762 3) Branch Conditional to Link Register: bclr, bclrl,
9763 where (2) and (3) have BO=0x14 making them unconditional,
9764 prevent the bad prefetch because the prefetch itself is
9765 affected by these instructions. This happens even if the
9766 instruction is not executed.
9767
9768 A bctr example:
9769 .
9770 . lis 9,new_page@ha
9771 . addi 9,9,new_page@l
9772 . mtctr 9
9773 . bctr
9774 . nop
9775 . nop
9776 . new_page:
9777 .
9778 The bctr is not predicted taken due to ctr not being
9779 ready, so prefetch continues on past the bctr into the
9780 new page which might have stale instructions. If they
9781 fail to be flushed, then they will be executed after the
9782 bctr executes. Either of the following modifications
9783 prevent the bad prefetch from happening in the first
9784 place:
9785 .
9786 . lis 9,new_page@ha lis 9,new_page@ha
9787 . addi 9,9,new_page@l addi 9,9,new_page@l
9788 . mtctr 9 mtctr 9
9789 . bctr bctr
9790 . nop b somewhere_else
9791 . b somewhere_else nop
9792 . new_page: new_page:
9793 . */
9794 insn = bfd_get_32 (input_bfd, contents + offset);
9795 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9796 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9797 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9798 || ((insn & (0x3f << 26)) == (19u << 26)
9799 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9800 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9801 continue;
9802
9803 patch_addr = (start_addr + input_section->size
9804 - relax_info->workaround_size);
9805 patch_addr = (patch_addr + 15) & -16;
9806 patch_off = patch_addr - start_addr;
9807 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9808
9809 if (rel != NULL
9810 && rel->r_offset >= offset
9811 && rel->r_offset < offset + 4)
9812 {
9813 asection *sreloc;
9814
9815 /* If the insn we are patching had a reloc, adjust the
9816 reloc r_offset so that the reloc applies to the moved
9817 location. This matters for -r and --emit-relocs. */
9818 if (rel + 1 != relend)
9819 {
9820 Elf_Internal_Rela tmp = *rel;
9821
9822 /* Keep the relocs sorted by r_offset. */
9823 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9824 relend[-1] = tmp;
9825 }
9826 relend[-1].r_offset += patch_off - offset;
9827
9828 /* Adjust REL16 addends too. */
9829 switch (ELF32_R_TYPE (relend[-1].r_info))
9830 {
9831 case R_PPC_REL16:
9832 case R_PPC_REL16_LO:
9833 case R_PPC_REL16_HI:
9834 case R_PPC_REL16_HA:
9835 relend[-1].r_addend += patch_off - offset;
9836 break;
9837 default:
9838 break;
9839 }
9840
9841 /* If we are building a PIE or shared library with
9842 non-PIC objects, perhaps we had a dynamic reloc too?
9843 If so, the dynamic reloc must move with the insn. */
9844 sreloc = elf_section_data (input_section)->sreloc;
9845 if (sreloc != NULL)
9846 {
9847 Elf32_External_Rela *slo, *shi, *srelend;
9848 bfd_vma soffset;
9849
9850 slo = (Elf32_External_Rela *) sreloc->contents;
9851 shi = srelend = slo + sreloc->reloc_count;
9852 soffset = (offset + input_section->output_section->vma
9853 + input_section->output_offset);
9854 while (slo < shi)
9855 {
9856 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9857 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9858 &outrel);
9859 if (outrel.r_offset < soffset)
9860 slo = srel + 1;
9861 else if (outrel.r_offset > soffset + 3)
9862 shi = srel;
9863 else
9864 {
9865 if (srel + 1 != srelend)
9866 {
9867 memmove (srel, srel + 1,
9868 (srelend - (srel + 1)) * sizeof (*srel));
9869 srel = srelend - 1;
9870 }
9871 outrel.r_offset += patch_off - offset;
9872 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9873 (bfd_byte *) srel);
9874 break;
9875 }
9876 }
9877 }
9878 }
9879 else
9880 rel = NULL;
9881
9882 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9883 && (insn & 2) == 0 /* relative */)
9884 {
9885 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9886
9887 delta += offset - patch_off;
9888 if (bfd_link_relocatable (info) && rel != NULL)
9889 delta = 0;
9890 if (!bfd_link_relocatable (info) && rel != NULL)
9891 {
9892 enum elf_ppc_reloc_type r_type;
9893
9894 r_type = ELF32_R_TYPE (relend[-1].r_info);
9895 if (r_type == R_PPC_REL14_BRTAKEN)
9896 insn |= BRANCH_PREDICT_BIT;
9897 else if (r_type == R_PPC_REL14_BRNTAKEN)
9898 insn &= ~BRANCH_PREDICT_BIT;
9899 else
9900 BFD_ASSERT (r_type == R_PPC_REL14);
9901
9902 if ((r_type == R_PPC_REL14_BRTAKEN
9903 || r_type == R_PPC_REL14_BRNTAKEN)
9904 && delta + 0x8000 < 0x10000
9905 && (bfd_signed_vma) delta < 0)
9906 insn ^= BRANCH_PREDICT_BIT;
9907 }
9908 if (delta + 0x8000 < 0x10000)
9909 {
9910 bfd_put_32 (input_bfd,
9911 (insn & ~0xfffc) | (delta & 0xfffc),
9912 contents + patch_off);
9913 patch_off += 4;
9914 bfd_put_32 (input_bfd,
9915 B | ((offset + 4 - patch_off) & 0x3fffffc),
9916 contents + patch_off);
9917 patch_off += 4;
9918 }
9919 else
9920 {
9921 if (rel != NULL)
9922 {
9923 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9924
9925 relend[-1].r_offset += 8;
9926 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9927 }
9928 bfd_put_32 (input_bfd,
9929 (insn & ~0xfffc) | 8,
9930 contents + patch_off);
9931 patch_off += 4;
9932 bfd_put_32 (input_bfd,
9933 B | ((offset + 4 - patch_off) & 0x3fffffc),
9934 contents + patch_off);
9935 patch_off += 4;
9936 bfd_put_32 (input_bfd,
9937 B | ((delta - 8) & 0x3fffffc),
9938 contents + patch_off);
9939 patch_off += 4;
9940 }
9941 }
9942 else
9943 {
9944 bfd_put_32 (input_bfd, insn, contents + patch_off);
9945 patch_off += 4;
9946 bfd_put_32 (input_bfd,
9947 B | ((offset + 4 - patch_off) & 0x3fffffc),
9948 contents + patch_off);
9949 patch_off += 4;
9950 }
9951 BFD_ASSERT (patch_off <= input_section->size);
9952 relax_info->workaround_size = input_section->size - patch_off;
9953 }
9954 }
9955
9956 return ret;
9957 }
9958 \f
9959 /* Finish up dynamic symbol handling. We set the contents of various
9960 dynamic sections here. */
9961
9962 static bfd_boolean
9963 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9964 struct bfd_link_info *info,
9965 struct elf_link_hash_entry *h,
9966 Elf_Internal_Sym *sym)
9967 {
9968 struct ppc_elf_link_hash_table *htab;
9969 struct plt_entry *ent;
9970 bfd_boolean doneone;
9971
9972 #ifdef DEBUG
9973 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9974 h->root.root.string);
9975 #endif
9976
9977 htab = ppc_elf_hash_table (info);
9978 BFD_ASSERT (htab->elf.dynobj != NULL);
9979
9980 doneone = FALSE;
9981 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9982 if (ent->plt.offset != (bfd_vma) -1)
9983 {
9984 if (!doneone)
9985 {
9986 Elf_Internal_Rela rela;
9987 bfd_byte *loc;
9988 bfd_vma reloc_index;
9989
9990 if (htab->plt_type == PLT_NEW
9991 || !htab->elf.dynamic_sections_created
9992 || h->dynindx == -1)
9993 reloc_index = ent->plt.offset / 4;
9994 else
9995 {
9996 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9997 / htab->plt_slot_size);
9998 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9999 && htab->plt_type == PLT_OLD)
10000 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10001 }
10002
10003 /* This symbol has an entry in the procedure linkage table.
10004 Set it up. */
10005 if (htab->plt_type == PLT_VXWORKS
10006 && htab->elf.dynamic_sections_created
10007 && h->dynindx != -1)
10008 {
10009 bfd_vma got_offset;
10010 const bfd_vma *plt_entry;
10011
10012 /* The first three entries in .got.plt are reserved. */
10013 got_offset = (reloc_index + 3) * 4;
10014
10015 /* Use the right PLT. */
10016 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10017 : ppc_elf_vxworks_plt_entry;
10018
10019 /* Fill in the .plt on VxWorks. */
10020 if (bfd_link_pic (info))
10021 {
10022 bfd_put_32 (output_bfd,
10023 plt_entry[0] | PPC_HA (got_offset),
10024 htab->plt->contents + ent->plt.offset + 0);
10025 bfd_put_32 (output_bfd,
10026 plt_entry[1] | PPC_LO (got_offset),
10027 htab->plt->contents + ent->plt.offset + 4);
10028 }
10029 else
10030 {
10031 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10032
10033 bfd_put_32 (output_bfd,
10034 plt_entry[0] | PPC_HA (got_loc),
10035 htab->plt->contents + ent->plt.offset + 0);
10036 bfd_put_32 (output_bfd,
10037 plt_entry[1] | PPC_LO (got_loc),
10038 htab->plt->contents + ent->plt.offset + 4);
10039 }
10040
10041 bfd_put_32 (output_bfd, plt_entry[2],
10042 htab->plt->contents + ent->plt.offset + 8);
10043 bfd_put_32 (output_bfd, plt_entry[3],
10044 htab->plt->contents + ent->plt.offset + 12);
10045
10046 /* This instruction is an immediate load. The value loaded is
10047 the byte offset of the R_PPC_JMP_SLOT relocation from the
10048 start of the .rela.plt section. The value is stored in the
10049 low-order 16 bits of the load instruction. */
10050 /* NOTE: It appears that this is now an index rather than a
10051 prescaled offset. */
10052 bfd_put_32 (output_bfd,
10053 plt_entry[4] | reloc_index,
10054 htab->plt->contents + ent->plt.offset + 16);
10055 /* This instruction is a PC-relative branch whose target is
10056 the start of the PLT section. The address of this branch
10057 instruction is 20 bytes beyond the start of this PLT entry.
10058 The address is encoded in bits 6-29, inclusive. The value
10059 stored is right-shifted by two bits, permitting a 26-bit
10060 offset. */
10061 bfd_put_32 (output_bfd,
10062 (plt_entry[5]
10063 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10064 htab->plt->contents + ent->plt.offset + 20);
10065 bfd_put_32 (output_bfd, plt_entry[6],
10066 htab->plt->contents + ent->plt.offset + 24);
10067 bfd_put_32 (output_bfd, plt_entry[7],
10068 htab->plt->contents + ent->plt.offset + 28);
10069
10070 /* Fill in the GOT entry corresponding to this PLT slot with
10071 the address immediately after the "bctr" instruction
10072 in this PLT entry. */
10073 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
10074 + htab->plt->output_offset
10075 + ent->plt.offset + 16),
10076 htab->sgotplt->contents + got_offset);
10077
10078 if (!bfd_link_pic (info))
10079 {
10080 /* Fill in a couple of entries in .rela.plt.unloaded. */
10081 loc = htab->srelplt2->contents
10082 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10083 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10084 * sizeof (Elf32_External_Rela));
10085
10086 /* Provide the @ha relocation for the first instruction. */
10087 rela.r_offset = (htab->plt->output_section->vma
10088 + htab->plt->output_offset
10089 + ent->plt.offset + 2);
10090 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10091 R_PPC_ADDR16_HA);
10092 rela.r_addend = got_offset;
10093 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10094 loc += sizeof (Elf32_External_Rela);
10095
10096 /* Provide the @l relocation for the second instruction. */
10097 rela.r_offset = (htab->plt->output_section->vma
10098 + htab->plt->output_offset
10099 + ent->plt.offset + 6);
10100 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10101 R_PPC_ADDR16_LO);
10102 rela.r_addend = got_offset;
10103 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10104 loc += sizeof (Elf32_External_Rela);
10105
10106 /* Provide a relocation for the GOT entry corresponding to this
10107 PLT slot. Point it at the middle of the .plt entry. */
10108 rela.r_offset = (htab->sgotplt->output_section->vma
10109 + htab->sgotplt->output_offset
10110 + got_offset);
10111 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10112 R_PPC_ADDR32);
10113 rela.r_addend = ent->plt.offset + 16;
10114 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10115 }
10116
10117 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10118 In particular, the offset for the relocation is not the
10119 address of the PLT entry for this function, as specified
10120 by the ABI. Instead, the offset is set to the address of
10121 the GOT slot for this function. See EABI 4.4.4.1. */
10122 rela.r_offset = (htab->sgotplt->output_section->vma
10123 + htab->sgotplt->output_offset
10124 + got_offset);
10125
10126 }
10127 else
10128 {
10129 asection *splt = htab->plt;
10130 if (!htab->elf.dynamic_sections_created
10131 || h->dynindx == -1)
10132 splt = htab->iplt;
10133
10134 rela.r_offset = (splt->output_section->vma
10135 + splt->output_offset
10136 + ent->plt.offset);
10137 if (htab->plt_type == PLT_OLD
10138 || !htab->elf.dynamic_sections_created
10139 || h->dynindx == -1)
10140 {
10141 /* We don't need to fill in the .plt. The ppc dynamic
10142 linker will fill it in. */
10143 }
10144 else
10145 {
10146 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10147 + htab->glink->output_section->vma
10148 + htab->glink->output_offset);
10149 bfd_put_32 (output_bfd, val,
10150 splt->contents + ent->plt.offset);
10151 }
10152 }
10153
10154 /* Fill in the entry in the .rela.plt section. */
10155 rela.r_addend = 0;
10156 if (!htab->elf.dynamic_sections_created
10157 || h->dynindx == -1)
10158 {
10159 BFD_ASSERT (h->type == STT_GNU_IFUNC
10160 && h->def_regular
10161 && (h->root.type == bfd_link_hash_defined
10162 || h->root.type == bfd_link_hash_defweak));
10163 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10164 rela.r_addend = SYM_VAL (h);
10165 }
10166 else
10167 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10168
10169 if (!htab->elf.dynamic_sections_created
10170 || h->dynindx == -1)
10171 loc = (htab->reliplt->contents
10172 + (htab->reliplt->reloc_count++
10173 * sizeof (Elf32_External_Rela)));
10174 else
10175 loc = (htab->relplt->contents
10176 + reloc_index * sizeof (Elf32_External_Rela));
10177 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10178
10179 if (!h->def_regular)
10180 {
10181 /* Mark the symbol as undefined, rather than as
10182 defined in the .plt section. Leave the value if
10183 there were any relocations where pointer equality
10184 matters (this is a clue for the dynamic linker, to
10185 make function pointer comparisons work between an
10186 application and shared library), otherwise set it
10187 to zero. */
10188 sym->st_shndx = SHN_UNDEF;
10189 if (!h->pointer_equality_needed)
10190 sym->st_value = 0;
10191 else if (!h->ref_regular_nonweak)
10192 {
10193 /* This breaks function pointer comparisons, but
10194 that is better than breaking tests for a NULL
10195 function pointer. */
10196 sym->st_value = 0;
10197 }
10198 }
10199 else if (h->type == STT_GNU_IFUNC
10200 && !bfd_link_pic (info))
10201 {
10202 /* Set the value of ifunc symbols in a non-pie
10203 executable to the glink entry. This is to avoid
10204 text relocations. We can't do this for ifunc in
10205 allocate_dynrelocs, as we do for normal dynamic
10206 function symbols with plt entries, because we need
10207 to keep the original value around for the ifunc
10208 relocation. */
10209 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10210 (output_bfd, htab->glink->output_section));
10211 sym->st_value = (ent->glink_offset
10212 + htab->glink->output_offset
10213 + htab->glink->output_section->vma);
10214 }
10215 doneone = TRUE;
10216 }
10217
10218 if (htab->plt_type == PLT_NEW
10219 || !htab->elf.dynamic_sections_created
10220 || h->dynindx == -1)
10221 {
10222 unsigned char *p;
10223 asection *splt = htab->plt;
10224 if (!htab->elf.dynamic_sections_created
10225 || h->dynindx == -1)
10226 splt = htab->iplt;
10227
10228 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10229
10230 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10231 {
10232 bfd_put_32 (output_bfd, LWZ_11_3, p);
10233 p += 4;
10234 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10235 p += 4;
10236 bfd_put_32 (output_bfd, MR_0_3, p);
10237 p += 4;
10238 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10239 p += 4;
10240 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10241 p += 4;
10242 bfd_put_32 (output_bfd, BEQLR, p);
10243 p += 4;
10244 bfd_put_32 (output_bfd, MR_3_0, p);
10245 p += 4;
10246 bfd_put_32 (output_bfd, NOP, p);
10247 p += 4;
10248 }
10249
10250 write_glink_stub (ent, splt, p, info);
10251
10252 if (!bfd_link_pic (info))
10253 /* We only need one non-PIC glink stub. */
10254 break;
10255 }
10256 else
10257 break;
10258 }
10259
10260 if (h->needs_copy)
10261 {
10262 asection *s;
10263 Elf_Internal_Rela rela;
10264 bfd_byte *loc;
10265
10266 /* This symbols needs a copy reloc. Set it up. */
10267
10268 #ifdef DEBUG
10269 fprintf (stderr, ", copy");
10270 #endif
10271
10272 BFD_ASSERT (h->dynindx != -1);
10273
10274 if (ppc_elf_hash_entry (h)->has_sda_refs)
10275 s = htab->relsbss;
10276 else
10277 s = htab->relbss;
10278 BFD_ASSERT (s != NULL);
10279
10280 rela.r_offset = SYM_VAL (h);
10281 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10282 rela.r_addend = 0;
10283 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10284 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10285 }
10286
10287 #ifdef DEBUG
10288 fprintf (stderr, "\n");
10289 #endif
10290
10291 return TRUE;
10292 }
10293 \f
10294 static enum elf_reloc_type_class
10295 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10296 const asection *rel_sec,
10297 const Elf_Internal_Rela *rela)
10298 {
10299 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10300
10301 if (rel_sec == htab->reliplt)
10302 return reloc_class_ifunc;
10303
10304 switch (ELF32_R_TYPE (rela->r_info))
10305 {
10306 case R_PPC_RELATIVE:
10307 return reloc_class_relative;
10308 case R_PPC_JMP_SLOT:
10309 return reloc_class_plt;
10310 case R_PPC_COPY:
10311 return reloc_class_copy;
10312 default:
10313 return reloc_class_normal;
10314 }
10315 }
10316 \f
10317 /* Finish up the dynamic sections. */
10318
10319 static bfd_boolean
10320 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10321 struct bfd_link_info *info)
10322 {
10323 asection *sdyn;
10324 asection *splt;
10325 struct ppc_elf_link_hash_table *htab;
10326 bfd_vma got;
10327 bfd *dynobj;
10328 bfd_boolean ret = TRUE;
10329
10330 #ifdef DEBUG
10331 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10332 #endif
10333
10334 htab = ppc_elf_hash_table (info);
10335 dynobj = elf_hash_table (info)->dynobj;
10336 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10337 if (htab->is_vxworks)
10338 splt = bfd_get_linker_section (dynobj, ".plt");
10339 else
10340 splt = NULL;
10341
10342 got = 0;
10343 if (htab->elf.hgot != NULL)
10344 got = SYM_VAL (htab->elf.hgot);
10345
10346 if (htab->elf.dynamic_sections_created)
10347 {
10348 Elf32_External_Dyn *dyncon, *dynconend;
10349
10350 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
10351
10352 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10353 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10354 for (; dyncon < dynconend; dyncon++)
10355 {
10356 Elf_Internal_Dyn dyn;
10357 asection *s;
10358
10359 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10360
10361 switch (dyn.d_tag)
10362 {
10363 case DT_PLTGOT:
10364 if (htab->is_vxworks)
10365 s = htab->sgotplt;
10366 else
10367 s = htab->plt;
10368 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10369 break;
10370
10371 case DT_PLTRELSZ:
10372 dyn.d_un.d_val = htab->relplt->size;
10373 break;
10374
10375 case DT_JMPREL:
10376 s = htab->relplt;
10377 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10378 break;
10379
10380 case DT_PPC_GOT:
10381 dyn.d_un.d_ptr = got;
10382 break;
10383
10384 case DT_RELASZ:
10385 if (htab->is_vxworks)
10386 {
10387 if (htab->relplt)
10388 dyn.d_un.d_ptr -= htab->relplt->size;
10389 break;
10390 }
10391 continue;
10392
10393 default:
10394 if (htab->is_vxworks
10395 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10396 break;
10397 continue;
10398 }
10399
10400 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10401 }
10402 }
10403
10404 if (htab->got != NULL)
10405 {
10406 if (htab->elf.hgot->root.u.def.section == htab->got
10407 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
10408 {
10409 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10410
10411 p += htab->elf.hgot->root.u.def.value;
10412 if (htab->plt_type == PLT_OLD)
10413 {
10414 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10415 so that a function can easily find the address of
10416 _GLOBAL_OFFSET_TABLE_. */
10417 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10418 < htab->elf.hgot->root.u.def.section->size);
10419 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10420 }
10421
10422 if (sdyn != NULL)
10423 {
10424 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10425 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10426 < htab->elf.hgot->root.u.def.section->size);
10427 bfd_put_32 (output_bfd, val, p);
10428 }
10429 }
10430 else
10431 {
10432 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10433 htab->elf.hgot->root.root.string,
10434 (htab->sgotplt != NULL
10435 ? htab->sgotplt->name : htab->got->name));
10436 bfd_set_error (bfd_error_bad_value);
10437 ret = FALSE;
10438 }
10439
10440 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
10441 }
10442
10443 /* Fill in the first entry in the VxWorks procedure linkage table. */
10444 if (splt && splt->size > 0)
10445 {
10446 /* Use the right PLT. */
10447 const bfd_vma *plt_entry = (bfd_link_pic (info)
10448 ? ppc_elf_vxworks_pic_plt0_entry
10449 : ppc_elf_vxworks_plt0_entry);
10450
10451 if (!bfd_link_pic (info))
10452 {
10453 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10454
10455 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10456 splt->contents + 0);
10457 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10458 splt->contents + 4);
10459 }
10460 else
10461 {
10462 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10463 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10464 }
10465 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10466 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10467 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10468 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10469 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10470 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10471
10472 if (! bfd_link_pic (info))
10473 {
10474 Elf_Internal_Rela rela;
10475 bfd_byte *loc;
10476
10477 loc = htab->srelplt2->contents;
10478
10479 /* Output the @ha relocation for the first instruction. */
10480 rela.r_offset = (htab->plt->output_section->vma
10481 + htab->plt->output_offset
10482 + 2);
10483 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10484 rela.r_addend = 0;
10485 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10486 loc += sizeof (Elf32_External_Rela);
10487
10488 /* Output the @l relocation for the second instruction. */
10489 rela.r_offset = (htab->plt->output_section->vma
10490 + htab->plt->output_offset
10491 + 6);
10492 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10493 rela.r_addend = 0;
10494 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10495 loc += sizeof (Elf32_External_Rela);
10496
10497 /* Fix up the remaining relocations. They may have the wrong
10498 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10499 in which symbols were output. */
10500 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10501 {
10502 Elf_Internal_Rela rel;
10503
10504 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10505 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10506 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10507 loc += sizeof (Elf32_External_Rela);
10508
10509 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10510 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10511 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10512 loc += sizeof (Elf32_External_Rela);
10513
10514 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10515 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10516 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10517 loc += sizeof (Elf32_External_Rela);
10518 }
10519 }
10520 }
10521
10522 if (htab->glink != NULL
10523 && htab->glink->contents != NULL
10524 && htab->elf.dynamic_sections_created)
10525 {
10526 unsigned char *p;
10527 unsigned char *endp;
10528 bfd_vma res0;
10529 unsigned int i;
10530
10531 /*
10532 * PIC glink code is the following:
10533 *
10534 * # ith PLT code stub.
10535 * addis 11,30,(plt+(i-1)*4-got)@ha
10536 * lwz 11,(plt+(i-1)*4-got)@l(11)
10537 * mtctr 11
10538 * bctr
10539 *
10540 * # A table of branches, one for each plt entry.
10541 * # The idea is that the plt call stub loads ctr and r11 with these
10542 * # addresses, so (r11 - res_0) gives the plt index * 4.
10543 * res_0: b PLTresolve
10544 * res_1: b PLTresolve
10545 * .
10546 * # Some number of entries towards the end can be nops
10547 * res_n_m3: nop
10548 * res_n_m2: nop
10549 * res_n_m1:
10550 *
10551 * PLTresolve:
10552 * addis 11,11,(1f-res_0)@ha
10553 * mflr 0
10554 * bcl 20,31,1f
10555 * 1: addi 11,11,(1b-res_0)@l
10556 * mflr 12
10557 * mtlr 0
10558 * sub 11,11,12 # r11 = index * 4
10559 * addis 12,12,(got+4-1b)@ha
10560 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10561 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10562 * mtctr 0
10563 * add 0,11,11
10564 * add 11,0,11 # r11 = index * 12 = reloc offset.
10565 * bctr
10566 */
10567 static const unsigned int pic_plt_resolve[] =
10568 {
10569 ADDIS_11_11,
10570 MFLR_0,
10571 BCL_20_31,
10572 ADDI_11_11,
10573 MFLR_12,
10574 MTLR_0,
10575 SUB_11_11_12,
10576 ADDIS_12_12,
10577 LWZ_0_12,
10578 LWZ_12_12,
10579 MTCTR_0,
10580 ADD_0_11_11,
10581 ADD_11_0_11,
10582 BCTR,
10583 NOP,
10584 NOP
10585 };
10586
10587 /*
10588 * Non-PIC glink code is a little simpler.
10589 *
10590 * # ith PLT code stub.
10591 * lis 11,(plt+(i-1)*4)@ha
10592 * lwz 11,(plt+(i-1)*4)@l(11)
10593 * mtctr 11
10594 * bctr
10595 *
10596 * The branch table is the same, then comes
10597 *
10598 * PLTresolve:
10599 * lis 12,(got+4)@ha
10600 * addis 11,11,(-res_0)@ha
10601 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10602 * addi 11,11,(-res_0)@l # r11 = index * 4
10603 * mtctr 0
10604 * add 0,11,11
10605 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10606 * add 11,0,11 # r11 = index * 12 = reloc offset.
10607 * bctr
10608 */
10609 static const unsigned int plt_resolve[] =
10610 {
10611 LIS_12,
10612 ADDIS_11_11,
10613 LWZ_0_12,
10614 ADDI_11_11,
10615 MTCTR_0,
10616 ADD_0_11_11,
10617 LWZ_12_12,
10618 ADD_11_0_11,
10619 BCTR,
10620 NOP,
10621 NOP,
10622 NOP,
10623 NOP,
10624 NOP,
10625 NOP,
10626 NOP
10627 };
10628
10629 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10630 abort ();
10631 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10632 abort ();
10633
10634 /* Build the branch table, one for each plt entry (less one),
10635 and perhaps some padding. */
10636 p = htab->glink->contents;
10637 p += htab->glink_pltresolve;
10638 endp = htab->glink->contents;
10639 endp += htab->glink->size - GLINK_PLTRESOLVE;
10640 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10641 {
10642 bfd_put_32 (output_bfd, B + endp - p, p);
10643 p += 4;
10644 }
10645 while (p < endp)
10646 {
10647 bfd_put_32 (output_bfd, NOP, p);
10648 p += 4;
10649 }
10650
10651 res0 = (htab->glink_pltresolve
10652 + htab->glink->output_section->vma
10653 + htab->glink->output_offset);
10654
10655 if (htab->params->ppc476_workaround)
10656 {
10657 /* Ensure that a call stub at the end of a page doesn't
10658 result in prefetch over the end of the page into the
10659 glink branch table. */
10660 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10661 bfd_vma page_addr;
10662 bfd_vma glink_start = (htab->glink->output_section->vma
10663 + htab->glink->output_offset);
10664
10665 for (page_addr = res0 & -pagesize;
10666 page_addr > glink_start;
10667 page_addr -= pagesize)
10668 {
10669 /* We have a plt call stub that may need fixing. */
10670 bfd_byte *loc;
10671 unsigned int insn;
10672
10673 loc = htab->glink->contents + page_addr - 4 - glink_start;
10674 insn = bfd_get_32 (output_bfd, loc);
10675 if (insn == BCTR)
10676 {
10677 /* By alignment, we know that there must be at least
10678 one other call stub before this one. */
10679 insn = bfd_get_32 (output_bfd, loc - 16);
10680 if (insn == BCTR)
10681 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10682 else
10683 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10684 }
10685 }
10686 }
10687
10688 /* Last comes the PLTresolve stub. */
10689 if (bfd_link_pic (info))
10690 {
10691 bfd_vma bcl;
10692
10693 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10694 {
10695 unsigned int insn = pic_plt_resolve[i];
10696
10697 if (htab->params->ppc476_workaround && insn == NOP)
10698 insn = BA + 0;
10699 bfd_put_32 (output_bfd, insn, p);
10700 p += 4;
10701 }
10702 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10703
10704 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10705 + htab->glink->output_section->vma
10706 + htab->glink->output_offset);
10707
10708 bfd_put_32 (output_bfd,
10709 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10710 bfd_put_32 (output_bfd,
10711 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10712 bfd_put_32 (output_bfd,
10713 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10714 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10715 {
10716 bfd_put_32 (output_bfd,
10717 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10718 bfd_put_32 (output_bfd,
10719 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10720 }
10721 else
10722 {
10723 bfd_put_32 (output_bfd,
10724 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10725 bfd_put_32 (output_bfd,
10726 LWZ_12_12 + 4, p + 9*4);
10727 }
10728 }
10729 else
10730 {
10731 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10732 {
10733 unsigned int insn = plt_resolve[i];
10734
10735 if (htab->params->ppc476_workaround && insn == NOP)
10736 insn = BA + 0;
10737 bfd_put_32 (output_bfd, insn, p);
10738 p += 4;
10739 }
10740 p -= 4 * ARRAY_SIZE (plt_resolve);
10741
10742 bfd_put_32 (output_bfd,
10743 LIS_12 + PPC_HA (got + 4), p + 0*4);
10744 bfd_put_32 (output_bfd,
10745 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10746 bfd_put_32 (output_bfd,
10747 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10748 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10749 {
10750 bfd_put_32 (output_bfd,
10751 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10752 bfd_put_32 (output_bfd,
10753 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10754 }
10755 else
10756 {
10757 bfd_put_32 (output_bfd,
10758 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10759 bfd_put_32 (output_bfd,
10760 LWZ_12_12 + 4, p + 6*4);
10761 }
10762 }
10763 }
10764
10765 if (htab->glink_eh_frame != NULL
10766 && htab->glink_eh_frame->contents != NULL)
10767 {
10768 unsigned char *p = htab->glink_eh_frame->contents;
10769 bfd_vma val;
10770
10771 p += sizeof (glink_eh_frame_cie);
10772 /* FDE length. */
10773 p += 4;
10774 /* CIE pointer. */
10775 p += 4;
10776 /* Offset to .glink. */
10777 val = (htab->glink->output_section->vma
10778 + htab->glink->output_offset);
10779 val -= (htab->glink_eh_frame->output_section->vma
10780 + htab->glink_eh_frame->output_offset);
10781 val -= p - htab->glink_eh_frame->contents;
10782 bfd_put_32 (htab->elf.dynobj, val, p);
10783
10784 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10785 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10786 htab->glink_eh_frame,
10787 htab->glink_eh_frame->contents))
10788 return FALSE;
10789 }
10790
10791 return ret;
10792 }
10793 \f
10794 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10795 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10796 #define TARGET_BIG_SYM powerpc_elf32_vec
10797 #define TARGET_BIG_NAME "elf32-powerpc"
10798 #define ELF_ARCH bfd_arch_powerpc
10799 #define ELF_TARGET_ID PPC32_ELF_DATA
10800 #define ELF_MACHINE_CODE EM_PPC
10801 #ifdef __QNXTARGET__
10802 #define ELF_MAXPAGESIZE 0x1000
10803 #define ELF_COMMONPAGESIZE 0x1000
10804 #else
10805 #define ELF_MAXPAGESIZE 0x10000
10806 #define ELF_COMMONPAGESIZE 0x10000
10807 #endif
10808 #define ELF_MINPAGESIZE 0x1000
10809 #define elf_info_to_howto ppc_elf_info_to_howto
10810
10811 #ifdef EM_CYGNUS_POWERPC
10812 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10813 #endif
10814
10815 #ifdef EM_PPC_OLD
10816 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10817 #endif
10818
10819 #define elf_backend_plt_not_loaded 1
10820 #define elf_backend_can_gc_sections 1
10821 #define elf_backend_can_refcount 1
10822 #define elf_backend_rela_normal 1
10823 #define elf_backend_caches_rawsize 1
10824
10825 #define bfd_elf32_mkobject ppc_elf_mkobject
10826 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10827 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10828 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10829 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10830 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10831 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10832 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10833
10834 #define elf_backend_object_p ppc_elf_object_p
10835 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10836 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10837 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10838 #define elf_backend_relocate_section ppc_elf_relocate_section
10839 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10840 #define elf_backend_check_relocs ppc_elf_check_relocs
10841 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10842 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10843 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10844 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10845 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10846 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10847 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10848 #define elf_backend_fake_sections ppc_elf_fake_sections
10849 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10850 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10851 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10852 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10853 #define elf_backend_write_core_note ppc_elf_write_core_note
10854 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10855 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10856 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10857 #define elf_backend_write_section ppc_elf_write_section
10858 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10859 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10860 #define elf_backend_action_discarded ppc_elf_action_discarded
10861 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10862 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10863 #define elf_backend_section_processing ppc_elf_section_processing
10864
10865 #include "elf32-target.h"
10866
10867 /* FreeBSD Target */
10868
10869 #undef TARGET_LITTLE_SYM
10870 #undef TARGET_LITTLE_NAME
10871
10872 #undef TARGET_BIG_SYM
10873 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10874 #undef TARGET_BIG_NAME
10875 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10876
10877 #undef ELF_OSABI
10878 #define ELF_OSABI ELFOSABI_FREEBSD
10879
10880 #undef elf32_bed
10881 #define elf32_bed elf32_powerpc_fbsd_bed
10882
10883 #include "elf32-target.h"
10884
10885 /* VxWorks Target */
10886
10887 #undef TARGET_LITTLE_SYM
10888 #undef TARGET_LITTLE_NAME
10889
10890 #undef TARGET_BIG_SYM
10891 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10892 #undef TARGET_BIG_NAME
10893 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10894
10895 #undef ELF_OSABI
10896
10897 /* VxWorks uses the elf default section flags for .plt. */
10898 static const struct bfd_elf_special_section *
10899 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10900 {
10901 if (sec->name == NULL)
10902 return NULL;
10903
10904 if (strcmp (sec->name, ".plt") == 0)
10905 return _bfd_elf_get_sec_type_attr (abfd, sec);
10906
10907 return ppc_elf_get_sec_type_attr (abfd, sec);
10908 }
10909
10910 /* Like ppc_elf_link_hash_table_create, but overrides
10911 appropriately for VxWorks. */
10912 static struct bfd_link_hash_table *
10913 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10914 {
10915 struct bfd_link_hash_table *ret;
10916
10917 ret = ppc_elf_link_hash_table_create (abfd);
10918 if (ret)
10919 {
10920 struct ppc_elf_link_hash_table *htab
10921 = (struct ppc_elf_link_hash_table *)ret;
10922 htab->is_vxworks = 1;
10923 htab->plt_type = PLT_VXWORKS;
10924 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10925 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10926 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10927 }
10928 return ret;
10929 }
10930
10931 /* Tweak magic VxWorks symbols as they are loaded. */
10932 static bfd_boolean
10933 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10934 struct bfd_link_info *info,
10935 Elf_Internal_Sym *sym,
10936 const char **namep ATTRIBUTE_UNUSED,
10937 flagword *flagsp ATTRIBUTE_UNUSED,
10938 asection **secp,
10939 bfd_vma *valp)
10940 {
10941 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10942 valp))
10943 return FALSE;
10944
10945 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10946 }
10947
10948 static void
10949 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10950 {
10951 ppc_elf_final_write_processing(abfd, linker);
10952 elf_vxworks_final_write_processing(abfd, linker);
10953 }
10954
10955 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10956 define it. */
10957 #undef elf_backend_want_plt_sym
10958 #define elf_backend_want_plt_sym 1
10959 #undef elf_backend_want_got_plt
10960 #define elf_backend_want_got_plt 1
10961 #undef elf_backend_got_symbol_offset
10962 #define elf_backend_got_symbol_offset 0
10963 #undef elf_backend_plt_not_loaded
10964 #define elf_backend_plt_not_loaded 0
10965 #undef elf_backend_plt_readonly
10966 #define elf_backend_plt_readonly 1
10967 #undef elf_backend_got_header_size
10968 #define elf_backend_got_header_size 12
10969
10970 #undef bfd_elf32_get_synthetic_symtab
10971
10972 #undef bfd_elf32_bfd_link_hash_table_create
10973 #define bfd_elf32_bfd_link_hash_table_create \
10974 ppc_elf_vxworks_link_hash_table_create
10975 #undef elf_backend_add_symbol_hook
10976 #define elf_backend_add_symbol_hook \
10977 ppc_elf_vxworks_add_symbol_hook
10978 #undef elf_backend_link_output_symbol_hook
10979 #define elf_backend_link_output_symbol_hook \
10980 elf_vxworks_link_output_symbol_hook
10981 #undef elf_backend_final_write_processing
10982 #define elf_backend_final_write_processing \
10983 ppc_elf_vxworks_final_write_processing
10984 #undef elf_backend_get_sec_type_attr
10985 #define elf_backend_get_sec_type_attr \
10986 ppc_elf_vxworks_get_sec_type_attr
10987 #undef elf_backend_emit_relocs
10988 #define elf_backend_emit_relocs \
10989 elf_vxworks_emit_relocs
10990
10991 #undef elf32_bed
10992 #define elf32_bed ppc_elf_vxworks_bed
10993 #undef elf_backend_post_process_headers
10994
10995 #include "elf32-target.h"
GDB Binutils - Deliverables
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