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Use input_bfd in relocate_section
[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 /* xgettext:c-format */
2045 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2046 abfd, r_type);
2047 bfd_set_error (bfd_error_bad_value);
2048 r_type = R_PPC_NONE;
2049 }
2050 cache_ptr->howto = ppc_elf_howto_table[r_type];
2051
2052 /* Just because the above assert didn't trigger doesn't mean that
2053 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2054 if (!cache_ptr->howto)
2055 {
2056 /* xgettext:c-format */
2057 _bfd_error_handler (_("%B: invalid relocation type %d"),
2058 abfd, r_type);
2059 bfd_set_error (bfd_error_bad_value);
2060
2061 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2062 }
2063 }
2064
2065 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2066
2067 static bfd_reloc_status_type
2068 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2069 arelent *reloc_entry,
2070 asymbol *symbol,
2071 void *data ATTRIBUTE_UNUSED,
2072 asection *input_section,
2073 bfd *output_bfd,
2074 char **error_message ATTRIBUTE_UNUSED)
2075 {
2076 enum elf_ppc_reloc_type r_type;
2077 long insn;
2078 bfd_size_type octets;
2079 bfd_vma value;
2080
2081 if (output_bfd != NULL)
2082 {
2083 reloc_entry->address += input_section->output_offset;
2084 return bfd_reloc_ok;
2085 }
2086
2087 reloc_entry->addend += 0x8000;
2088 r_type = reloc_entry->howto->type;
2089 if (r_type != R_PPC_REL16DX_HA)
2090 return bfd_reloc_continue;
2091
2092 value = 0;
2093 if (!bfd_is_com_section (symbol->section))
2094 value = symbol->value;
2095 value += (reloc_entry->addend
2096 + symbol->section->output_offset
2097 + symbol->section->output_section->vma);
2098 value -= (reloc_entry->address
2099 + input_section->output_offset
2100 + input_section->output_section->vma);
2101 value >>= 16;
2102
2103 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2104 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2105 insn &= ~0x1fffc1;
2106 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2107 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2108 return bfd_reloc_ok;
2109 }
2110
2111 static bfd_reloc_status_type
2112 ppc_elf_unhandled_reloc (bfd *abfd,
2113 arelent *reloc_entry,
2114 asymbol *symbol,
2115 void *data,
2116 asection *input_section,
2117 bfd *output_bfd,
2118 char **error_message)
2119 {
2120 /* If this is a relocatable link (output_bfd test tells us), just
2121 call the generic function. Any adjustment will be done at final
2122 link time. */
2123 if (output_bfd != NULL)
2124 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2125 input_section, output_bfd, error_message);
2126
2127 if (error_message != NULL)
2128 {
2129 static char buf[60];
2130 sprintf (buf, _("generic linker can't handle %s"),
2131 reloc_entry->howto->name);
2132 *error_message = buf;
2133 }
2134 return bfd_reloc_dangerous;
2135 }
2136 \f
2137 /* Sections created by the linker. */
2138
2139 typedef struct elf_linker_section
2140 {
2141 /* Pointer to the bfd section. */
2142 asection *section;
2143 /* Section name. */
2144 const char *name;
2145 /* Associated bss section name. */
2146 const char *bss_name;
2147 /* Associated symbol name. */
2148 const char *sym_name;
2149 /* Associated symbol. */
2150 struct elf_link_hash_entry *sym;
2151 } elf_linker_section_t;
2152
2153 /* Linked list of allocated pointer entries. This hangs off of the
2154 symbol lists, and provides allows us to return different pointers,
2155 based on different addend's. */
2156
2157 typedef struct elf_linker_section_pointers
2158 {
2159 /* next allocated pointer for this symbol */
2160 struct elf_linker_section_pointers *next;
2161 /* offset of pointer from beginning of section */
2162 bfd_vma offset;
2163 /* addend used */
2164 bfd_vma addend;
2165 /* which linker section this is */
2166 elf_linker_section_t *lsect;
2167 } elf_linker_section_pointers_t;
2168
2169 struct ppc_elf_obj_tdata
2170 {
2171 struct elf_obj_tdata elf;
2172
2173 /* A mapping from local symbols to offsets into the various linker
2174 sections added. This is index by the symbol index. */
2175 elf_linker_section_pointers_t **linker_section_pointers;
2176
2177 /* Flags used to auto-detect plt type. */
2178 unsigned int makes_plt_call : 1;
2179 unsigned int has_rel16 : 1;
2180 };
2181
2182 #define ppc_elf_tdata(bfd) \
2183 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2184
2185 #define elf_local_ptr_offsets(bfd) \
2186 (ppc_elf_tdata (bfd)->linker_section_pointers)
2187
2188 #define is_ppc_elf(bfd) \
2189 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2190 && elf_object_id (bfd) == PPC32_ELF_DATA)
2191
2192 /* Override the generic function because we store some extras. */
2193
2194 static bfd_boolean
2195 ppc_elf_mkobject (bfd *abfd)
2196 {
2197 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2198 PPC32_ELF_DATA);
2199 }
2200
2201 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2202
2203 bfd_boolean
2204 _bfd_elf_ppc_set_arch (bfd *abfd)
2205 {
2206 unsigned long mach = 0;
2207 asection *s;
2208 unsigned char *contents;
2209
2210 if (abfd->arch_info->bits_per_word == 32
2211 && bfd_big_endian (abfd))
2212 {
2213
2214 for (s = abfd->sections; s != NULL; s = s->next)
2215 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2216 break;
2217 if (s != NULL)
2218 mach = bfd_mach_ppc_vle;
2219 }
2220
2221 if (mach == 0)
2222 {
2223 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2224 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2225 {
2226 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2227 unsigned int i;
2228
2229 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2230 {
2231 unsigned int val = bfd_get_32 (abfd, contents + i);
2232 switch (val >> 16)
2233 {
2234 case PPC_APUINFO_PMR:
2235 case PPC_APUINFO_RFMCI:
2236 if (mach == 0)
2237 mach = bfd_mach_ppc_titan;
2238 break;
2239
2240 case PPC_APUINFO_ISEL:
2241 case PPC_APUINFO_CACHELCK:
2242 if (mach == bfd_mach_ppc_titan)
2243 mach = bfd_mach_ppc_e500mc;
2244 break;
2245
2246 case PPC_APUINFO_SPE:
2247 case PPC_APUINFO_EFS:
2248 case PPC_APUINFO_BRLOCK:
2249 if (mach != bfd_mach_ppc_vle)
2250 mach = bfd_mach_ppc_e500;
2251 break;
2252
2253 case PPC_APUINFO_VLE:
2254 mach = bfd_mach_ppc_vle;
2255 break;
2256
2257 default:
2258 mach = -1ul;
2259 }
2260 }
2261 free (contents);
2262 }
2263 }
2264
2265 if (mach != 0 && mach != -1ul)
2266 {
2267 const bfd_arch_info_type *arch;
2268
2269 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2270 if (arch->mach == mach)
2271 {
2272 abfd->arch_info = arch;
2273 break;
2274 }
2275 }
2276 return TRUE;
2277 }
2278
2279 /* Fix bad default arch selected for a 32 bit input bfd when the
2280 default is 64 bit. Also select arch based on apuinfo. */
2281
2282 static bfd_boolean
2283 ppc_elf_object_p (bfd *abfd)
2284 {
2285 if (!abfd->arch_info->the_default)
2286 return TRUE;
2287
2288 if (abfd->arch_info->bits_per_word == 64)
2289 {
2290 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2291
2292 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2293 {
2294 /* Relies on arch after 64 bit default being 32 bit default. */
2295 abfd->arch_info = abfd->arch_info->next;
2296 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2297 }
2298 }
2299 return _bfd_elf_ppc_set_arch (abfd);
2300 }
2301
2302 /* Function to set whether a module needs the -mrelocatable bit set. */
2303
2304 static bfd_boolean
2305 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2306 {
2307 BFD_ASSERT (!elf_flags_init (abfd)
2308 || elf_elfheader (abfd)->e_flags == flags);
2309
2310 elf_elfheader (abfd)->e_flags = flags;
2311 elf_flags_init (abfd) = TRUE;
2312 return TRUE;
2313 }
2314
2315 /* Support for core dump NOTE sections. */
2316
2317 static bfd_boolean
2318 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2319 {
2320 int offset;
2321 unsigned int size;
2322
2323 switch (note->descsz)
2324 {
2325 default:
2326 return FALSE;
2327
2328 case 268: /* Linux/PPC. */
2329 /* pr_cursig */
2330 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2331
2332 /* pr_pid */
2333 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2334
2335 /* pr_reg */
2336 offset = 72;
2337 size = 192;
2338
2339 break;
2340 }
2341
2342 /* Make a ".reg/999" section. */
2343 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2344 size, note->descpos + offset);
2345 }
2346
2347 static bfd_boolean
2348 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2349 {
2350 switch (note->descsz)
2351 {
2352 default:
2353 return FALSE;
2354
2355 case 128: /* Linux/PPC elf_prpsinfo. */
2356 elf_tdata (abfd)->core->pid
2357 = bfd_get_32 (abfd, note->descdata + 16);
2358 elf_tdata (abfd)->core->program
2359 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2360 elf_tdata (abfd)->core->command
2361 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2362 }
2363
2364 /* Note that for some reason, a spurious space is tacked
2365 onto the end of the args in some (at least one anyway)
2366 implementations, so strip it off if it exists. */
2367
2368 {
2369 char *command = elf_tdata (abfd)->core->command;
2370 int n = strlen (command);
2371
2372 if (0 < n && command[n - 1] == ' ')
2373 command[n - 1] = '\0';
2374 }
2375
2376 return TRUE;
2377 }
2378
2379 char *
2380 elfcore_write_ppc_linux_prpsinfo32
2381 (bfd *abfd,
2382 char *buf,
2383 int *bufsiz,
2384 const struct elf_internal_linux_prpsinfo *prpsinfo)
2385 {
2386 struct elf_external_ppc_linux_prpsinfo32 data;
2387
2388 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data);
2389 return elfcore_write_note (abfd, buf, bufsiz,
2390 "CORE", NT_PRPSINFO, &data, sizeof (data));
2391 }
2392
2393 static char *
2394 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2395 {
2396 switch (note_type)
2397 {
2398 default:
2399 return NULL;
2400
2401 case NT_PRPSINFO:
2402 {
2403 char data[128];
2404 va_list ap;
2405
2406 va_start (ap, note_type);
2407 memset (data, 0, sizeof (data));
2408 strncpy (data + 32, va_arg (ap, const char *), 16);
2409 strncpy (data + 48, va_arg (ap, const char *), 80);
2410 va_end (ap);
2411 return elfcore_write_note (abfd, buf, bufsiz,
2412 "CORE", note_type, data, sizeof (data));
2413 }
2414
2415 case NT_PRSTATUS:
2416 {
2417 char data[268];
2418 va_list ap;
2419 long pid;
2420 int cursig;
2421 const void *greg;
2422
2423 va_start (ap, note_type);
2424 memset (data, 0, 72);
2425 pid = va_arg (ap, long);
2426 bfd_put_32 (abfd, pid, data + 24);
2427 cursig = va_arg (ap, int);
2428 bfd_put_16 (abfd, cursig, data + 12);
2429 greg = va_arg (ap, const void *);
2430 memcpy (data + 72, greg, 192);
2431 memset (data + 264, 0, 4);
2432 va_end (ap);
2433 return elfcore_write_note (abfd, buf, bufsiz,
2434 "CORE", note_type, data, sizeof (data));
2435 }
2436 }
2437 }
2438
2439 static flagword
2440 ppc_elf_lookup_section_flags (char *flag_name)
2441 {
2442
2443 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2444 return SHF_PPC_VLE;
2445
2446 return 0;
2447 }
2448
2449 /* Return address for Ith PLT stub in section PLT, for relocation REL
2450 or (bfd_vma) -1 if it should not be included. */
2451
2452 static bfd_vma
2453 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2454 const asection *plt ATTRIBUTE_UNUSED,
2455 const arelent *rel)
2456 {
2457 return rel->address;
2458 }
2459
2460 /* Handle a PowerPC specific section when reading an object file. This
2461 is called when bfd_section_from_shdr finds a section with an unknown
2462 type. */
2463
2464 static bfd_boolean
2465 ppc_elf_section_from_shdr (bfd *abfd,
2466 Elf_Internal_Shdr *hdr,
2467 const char *name,
2468 int shindex)
2469 {
2470 asection *newsect;
2471 flagword flags;
2472
2473 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2474 return FALSE;
2475
2476 newsect = hdr->bfd_section;
2477 flags = bfd_get_section_flags (abfd, newsect);
2478 if (hdr->sh_flags & SHF_EXCLUDE)
2479 flags |= SEC_EXCLUDE;
2480
2481 if (hdr->sh_type == SHT_ORDERED)
2482 flags |= SEC_SORT_ENTRIES;
2483
2484 bfd_set_section_flags (abfd, newsect, flags);
2485 return TRUE;
2486 }
2487
2488 /* Set up any other section flags and such that may be necessary. */
2489
2490 static bfd_boolean
2491 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2492 Elf_Internal_Shdr *shdr,
2493 asection *asect)
2494 {
2495 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2496 shdr->sh_type = SHT_ORDERED;
2497
2498 return TRUE;
2499 }
2500
2501 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2502 need to bump up the number of section headers. */
2503
2504 static int
2505 ppc_elf_additional_program_headers (bfd *abfd,
2506 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2507 {
2508 asection *s;
2509 int ret = 0;
2510
2511 s = bfd_get_section_by_name (abfd, ".sbss2");
2512 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2513 ++ret;
2514
2515 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2516 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2517 ++ret;
2518
2519 return ret;
2520 }
2521
2522 /* Modify the segment map for VLE executables. */
2523
2524 bfd_boolean
2525 ppc_elf_modify_segment_map (bfd *abfd,
2526 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2527 {
2528 struct elf_segment_map *m;
2529
2530 /* At this point in the link, output sections have already been sorted by
2531 LMA and assigned to segments. All that is left to do is to ensure
2532 there is no mixing of VLE & non-VLE sections in a text segment.
2533 If we find that case, we split the segment.
2534 We maintain the original output section order. */
2535
2536 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2537 {
2538 struct elf_segment_map *n;
2539 bfd_size_type amt;
2540 unsigned int j, k;
2541 unsigned int p_flags;
2542
2543 if (m->p_type != PT_LOAD || m->count == 0)
2544 continue;
2545
2546 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2547 {
2548 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2549 p_flags |= PF_W;
2550 if ((m->sections[j]->flags & SEC_CODE) != 0)
2551 {
2552 p_flags |= PF_X;
2553 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2554 p_flags |= PF_PPC_VLE;
2555 break;
2556 }
2557 }
2558 if (j != m->count)
2559 while (++j != m->count)
2560 {
2561 unsigned int p_flags1 = PF_R;
2562
2563 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2564 p_flags1 |= PF_W;
2565 if ((m->sections[j]->flags & SEC_CODE) != 0)
2566 {
2567 p_flags1 |= PF_X;
2568 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2569 p_flags1 |= PF_PPC_VLE;
2570 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2571 break;
2572 }
2573 p_flags |= p_flags1;
2574 }
2575 /* If we're splitting a segment which originally contained rw
2576 sections then those sections might now only be in one of the
2577 two parts. So always set p_flags if splitting, even if we
2578 are being called for objcopy with p_flags_valid set. */
2579 if (j != m->count || !m->p_flags_valid)
2580 {
2581 m->p_flags_valid = 1;
2582 m->p_flags = p_flags;
2583 }
2584 if (j == m->count)
2585 continue;
2586
2587 /* Sections 0..j-1 stay in this (current) segment,
2588 the remainder are put in a new segment.
2589 The scan resumes with the new segment. */
2590
2591 amt = sizeof (struct elf_segment_map);
2592 amt += (m->count - j - 1) * sizeof (asection *);
2593 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2594 if (n == NULL)
2595 return FALSE;
2596
2597 n->p_type = PT_LOAD;
2598 n->count = m->count - j;
2599 for (k = 0; k < n->count; ++k)
2600 n->sections[k] = m->sections[j + k];
2601 m->count = j;
2602 m->p_size_valid = 0;
2603 n->next = m->next;
2604 m->next = n;
2605 }
2606
2607 return TRUE;
2608 }
2609
2610 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2611 .PPC.EMB.sbss0 a normal section, and not a bss section so
2612 that the linker doesn't crater when trying to make more than
2613 2 sections. */
2614
2615 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2616 {
2617 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2618 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2619 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2620 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2621 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2622 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2623 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2624 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2625 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2626 { NULL, 0, 0, 0, 0 }
2627 };
2628
2629 /* This is what we want for new plt/got. */
2630 static struct bfd_elf_special_section ppc_alt_plt =
2631 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2632
2633 static const struct bfd_elf_special_section *
2634 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2635 {
2636 const struct bfd_elf_special_section *ssect;
2637
2638 /* See if this is one of the special sections. */
2639 if (sec->name == NULL)
2640 return NULL;
2641
2642 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2643 sec->use_rela_p);
2644 if (ssect != NULL)
2645 {
2646 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2647 ssect = &ppc_alt_plt;
2648 return ssect;
2649 }
2650
2651 return _bfd_elf_get_sec_type_attr (abfd, sec);
2652 }
2653 \f
2654 /* Very simple linked list structure for recording apuinfo values. */
2655 typedef struct apuinfo_list
2656 {
2657 struct apuinfo_list *next;
2658 unsigned long value;
2659 }
2660 apuinfo_list;
2661
2662 static apuinfo_list *head;
2663 static bfd_boolean apuinfo_set;
2664
2665 static void
2666 apuinfo_list_init (void)
2667 {
2668 head = NULL;
2669 apuinfo_set = FALSE;
2670 }
2671
2672 static void
2673 apuinfo_list_add (unsigned long value)
2674 {
2675 apuinfo_list *entry = head;
2676
2677 while (entry != NULL)
2678 {
2679 if (entry->value == value)
2680 return;
2681 entry = entry->next;
2682 }
2683
2684 entry = bfd_malloc (sizeof (* entry));
2685 if (entry == NULL)
2686 return;
2687
2688 entry->value = value;
2689 entry->next = head;
2690 head = entry;
2691 }
2692
2693 static unsigned
2694 apuinfo_list_length (void)
2695 {
2696 apuinfo_list *entry;
2697 unsigned long count;
2698
2699 for (entry = head, count = 0;
2700 entry;
2701 entry = entry->next)
2702 ++ count;
2703
2704 return count;
2705 }
2706
2707 static inline unsigned long
2708 apuinfo_list_element (unsigned long number)
2709 {
2710 apuinfo_list * entry;
2711
2712 for (entry = head;
2713 entry && number --;
2714 entry = entry->next)
2715 ;
2716
2717 return entry ? entry->value : 0;
2718 }
2719
2720 static void
2721 apuinfo_list_finish (void)
2722 {
2723 apuinfo_list *entry;
2724
2725 for (entry = head; entry;)
2726 {
2727 apuinfo_list *next = entry->next;
2728 free (entry);
2729 entry = next;
2730 }
2731
2732 head = NULL;
2733 }
2734
2735 /* Scan the input BFDs and create a linked list of
2736 the APUinfo values that will need to be emitted. */
2737
2738 static void
2739 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2740 {
2741 bfd *ibfd;
2742 asection *asec;
2743 char *buffer = NULL;
2744 bfd_size_type largest_input_size = 0;
2745 unsigned i;
2746 unsigned long length;
2747 const char *error_message = NULL;
2748
2749 if (link_info == NULL)
2750 return;
2751
2752 apuinfo_list_init ();
2753
2754 /* Read in the input sections contents. */
2755 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2756 {
2757 unsigned long datum;
2758
2759 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2760 if (asec == NULL)
2761 continue;
2762
2763 /* xgettext:c-format */
2764 error_message = _("corrupt %s section in %B");
2765 length = asec->size;
2766 if (length < 20)
2767 goto fail;
2768
2769 apuinfo_set = TRUE;
2770 if (largest_input_size < asec->size)
2771 {
2772 if (buffer)
2773 free (buffer);
2774 largest_input_size = asec->size;
2775 buffer = bfd_malloc (largest_input_size);
2776 if (!buffer)
2777 return;
2778 }
2779
2780 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2781 || (bfd_bread (buffer, length, ibfd) != length))
2782 {
2783 /* xgettext:c-format */
2784 error_message = _("unable to read in %s section from %B");
2785 goto fail;
2786 }
2787
2788 /* Verify the contents of the header. Note - we have to
2789 extract the values this way in order to allow for a
2790 host whose endian-ness is different from the target. */
2791 datum = bfd_get_32 (ibfd, buffer);
2792 if (datum != sizeof APUINFO_LABEL)
2793 goto fail;
2794
2795 datum = bfd_get_32 (ibfd, buffer + 8);
2796 if (datum != 0x2)
2797 goto fail;
2798
2799 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2800 goto fail;
2801
2802 /* Get the number of bytes used for apuinfo entries. */
2803 datum = bfd_get_32 (ibfd, buffer + 4);
2804 if (datum + 20 != length)
2805 goto fail;
2806
2807 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2808 for (i = 0; i < datum; i += 4)
2809 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2810 }
2811
2812 error_message = NULL;
2813
2814 if (apuinfo_set)
2815 {
2816 /* Compute the size of the output section. */
2817 unsigned num_entries = apuinfo_list_length ();
2818
2819 /* Set the output section size, if it exists. */
2820 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2821
2822 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2823 {
2824 ibfd = abfd;
2825 /* xgettext:c-format */
2826 error_message = _("warning: unable to set size of %s section in %B");
2827 }
2828 }
2829
2830 fail:
2831 if (buffer)
2832 free (buffer);
2833
2834 if (error_message)
2835 _bfd_error_handler (error_message, ibfd, APUINFO_SECTION_NAME);
2836 }
2837
2838 /* Prevent the output section from accumulating the input sections'
2839 contents. We have already stored this in our linked list structure. */
2840
2841 static bfd_boolean
2842 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2843 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2844 asection *asec,
2845 bfd_byte *contents ATTRIBUTE_UNUSED)
2846 {
2847 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2848 }
2849
2850 /* Finally we can generate the output section. */
2851
2852 static void
2853 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2854 {
2855 bfd_byte *buffer;
2856 asection *asec;
2857 unsigned i;
2858 unsigned num_entries;
2859 bfd_size_type length;
2860
2861 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2862 if (asec == NULL)
2863 return;
2864
2865 if (!apuinfo_set)
2866 return;
2867
2868 length = asec->size;
2869 if (length < 20)
2870 return;
2871
2872 buffer = bfd_malloc (length);
2873 if (buffer == NULL)
2874 {
2875 _bfd_error_handler
2876 (_("failed to allocate space for new APUinfo section."));
2877 return;
2878 }
2879
2880 /* Create the apuinfo header. */
2881 num_entries = apuinfo_list_length ();
2882 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2883 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2884 bfd_put_32 (abfd, 0x2, buffer + 8);
2885 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2886
2887 length = 20;
2888 for (i = 0; i < num_entries; i++)
2889 {
2890 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2891 length += 4;
2892 }
2893
2894 if (length != asec->size)
2895 _bfd_error_handler (_("failed to compute new APUinfo section."));
2896
2897 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2898 _bfd_error_handler (_("failed to install new APUinfo section."));
2899
2900 free (buffer);
2901
2902 apuinfo_list_finish ();
2903 }
2904 \f
2905 static bfd_boolean
2906 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2907 {
2908 bfd_byte buf[GLINK_ENTRY_SIZE];
2909
2910 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2911 return FALSE;
2912
2913 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2914 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2915 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2916 && bfd_get_32 (abfd, buf + 12) == BCTR);
2917 }
2918
2919 static bfd_boolean
2920 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2921 {
2922 bfd_vma vma = *(bfd_vma *) ptr;
2923 return ((section->flags & SEC_ALLOC) != 0
2924 && section->vma <= vma
2925 && vma < section->vma + section->size);
2926 }
2927
2928 static long
2929 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2930 long dynsymcount, asymbol **dynsyms,
2931 asymbol **ret)
2932 {
2933 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2934 asection *plt, *relplt, *dynamic, *glink;
2935 bfd_vma glink_vma = 0;
2936 bfd_vma resolv_vma = 0;
2937 bfd_vma stub_vma;
2938 asymbol *s;
2939 arelent *p;
2940 long count, i;
2941 size_t size;
2942 char *names;
2943 bfd_byte buf[4];
2944
2945 *ret = NULL;
2946
2947 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2948 return 0;
2949
2950 if (dynsymcount <= 0)
2951 return 0;
2952
2953 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2954 if (relplt == NULL)
2955 return 0;
2956
2957 plt = bfd_get_section_by_name (abfd, ".plt");
2958 if (plt == NULL)
2959 return 0;
2960
2961 /* Call common code to handle old-style executable PLTs. */
2962 if (elf_section_flags (plt) & SHF_EXECINSTR)
2963 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2964 dynsymcount, dynsyms, ret);
2965
2966 /* If this object was prelinked, the prelinker stored the address
2967 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2968 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2969 if (dynamic != NULL)
2970 {
2971 bfd_byte *dynbuf, *extdyn, *extdynend;
2972 size_t extdynsize;
2973 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2974
2975 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2976 return -1;
2977
2978 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2979 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2980
2981 extdyn = dynbuf;
2982 extdynend = extdyn + dynamic->size;
2983 for (; extdyn < extdynend; extdyn += extdynsize)
2984 {
2985 Elf_Internal_Dyn dyn;
2986 (*swap_dyn_in) (abfd, extdyn, &dyn);
2987
2988 if (dyn.d_tag == DT_NULL)
2989 break;
2990
2991 if (dyn.d_tag == DT_PPC_GOT)
2992 {
2993 unsigned int g_o_t = dyn.d_un.d_val;
2994 asection *got = bfd_get_section_by_name (abfd, ".got");
2995 if (got != NULL
2996 && bfd_get_section_contents (abfd, got, buf,
2997 g_o_t - got->vma + 4, 4))
2998 glink_vma = bfd_get_32 (abfd, buf);
2999 break;
3000 }
3001 }
3002 free (dynbuf);
3003 }
3004
3005 /* Otherwise we read the first plt entry. */
3006 if (glink_vma == 0)
3007 {
3008 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3009 glink_vma = bfd_get_32 (abfd, buf);
3010 }
3011
3012 if (glink_vma == 0)
3013 return 0;
3014
3015 /* The .glink section usually does not survive the final
3016 link; search for the section (usually .text) where the
3017 glink stubs now reside. */
3018 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3019 if (glink == NULL)
3020 return 0;
3021
3022 /* Determine glink PLT resolver by reading the relative branch
3023 from the first glink stub. */
3024 if (bfd_get_section_contents (abfd, glink, buf,
3025 glink_vma - glink->vma, 4))
3026 {
3027 unsigned int insn = bfd_get_32 (abfd, buf);
3028
3029 /* The first glink stub may either branch to the resolver ... */
3030 insn ^= B;
3031 if ((insn & ~0x3fffffc) == 0)
3032 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3033
3034 /* ... or fall through a bunch of NOPs. */
3035 else if ((insn ^ B ^ NOP) == 0)
3036 for (i = 4;
3037 bfd_get_section_contents (abfd, glink, buf,
3038 glink_vma - glink->vma + i, 4);
3039 i += 4)
3040 if (bfd_get_32 (abfd, buf) != NOP)
3041 {
3042 resolv_vma = glink_vma + i;
3043 break;
3044 }
3045 }
3046
3047 count = relplt->size / sizeof (Elf32_External_Rela);
3048 /* If the stubs are those for -shared/-pie then we might have
3049 multiple stubs for each plt entry. If that is the case then
3050 there is no way to associate stubs with their plt entries short
3051 of figuring out the GOT pointer value used in the stub. */
3052 if (!is_nonpic_glink_stub (abfd, glink,
3053 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3054 return 0;
3055
3056 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3057 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3058 return -1;
3059
3060 size = count * sizeof (asymbol);
3061 p = relplt->relocation;
3062 for (i = 0; i < count; i++, p++)
3063 {
3064 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3065 if (p->addend != 0)
3066 size += sizeof ("+0x") - 1 + 8;
3067 }
3068
3069 size += sizeof (asymbol) + sizeof ("__glink");
3070
3071 if (resolv_vma)
3072 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3073
3074 s = *ret = bfd_malloc (size);
3075 if (s == NULL)
3076 return -1;
3077
3078 stub_vma = glink_vma;
3079 names = (char *) (s + count + 1 + (resolv_vma != 0));
3080 p = relplt->relocation + count - 1;
3081 for (i = 0; i < count; i++)
3082 {
3083 size_t len;
3084
3085 *s = **p->sym_ptr_ptr;
3086 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3087 we are defining a symbol, ensure one of them is set. */
3088 if ((s->flags & BSF_LOCAL) == 0)
3089 s->flags |= BSF_GLOBAL;
3090 s->flags |= BSF_SYNTHETIC;
3091 s->section = glink;
3092 stub_vma -= 16;
3093 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3094 stub_vma -= 32;
3095 s->value = stub_vma - glink->vma;
3096 s->name = names;
3097 s->udata.p = NULL;
3098 len = strlen ((*p->sym_ptr_ptr)->name);
3099 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3100 names += len;
3101 if (p->addend != 0)
3102 {
3103 memcpy (names, "+0x", sizeof ("+0x") - 1);
3104 names += sizeof ("+0x") - 1;
3105 bfd_sprintf_vma (abfd, names, p->addend);
3106 names += strlen (names);
3107 }
3108 memcpy (names, "@plt", sizeof ("@plt"));
3109 names += sizeof ("@plt");
3110 ++s;
3111 --p;
3112 }
3113
3114 /* Add a symbol at the start of the glink branch table. */
3115 memset (s, 0, sizeof *s);
3116 s->the_bfd = abfd;
3117 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3118 s->section = glink;
3119 s->value = glink_vma - glink->vma;
3120 s->name = names;
3121 memcpy (names, "__glink", sizeof ("__glink"));
3122 names += sizeof ("__glink");
3123 s++;
3124 count++;
3125
3126 if (resolv_vma)
3127 {
3128 /* Add a symbol for the glink PLT resolver. */
3129 memset (s, 0, sizeof *s);
3130 s->the_bfd = abfd;
3131 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3132 s->section = glink;
3133 s->value = resolv_vma - glink->vma;
3134 s->name = names;
3135 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3136 names += sizeof ("__glink_PLTresolve");
3137 s++;
3138 count++;
3139 }
3140
3141 return count;
3142 }
3143 \f
3144 /* The following functions are specific to the ELF linker, while
3145 functions above are used generally. They appear in this file more
3146 or less in the order in which they are called. eg.
3147 ppc_elf_check_relocs is called early in the link process,
3148 ppc_elf_finish_dynamic_sections is one of the last functions
3149 called. */
3150
3151 /* Track PLT entries needed for a given symbol. We might need more
3152 than one glink entry per symbol when generating a pic binary. */
3153 struct plt_entry
3154 {
3155 struct plt_entry *next;
3156
3157 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3158 This field stores the offset into .got2 used to initialise the
3159 GOT pointer reg. It will always be at least 32768. (Current
3160 gcc always uses an offset of 32768, but ld -r will pack .got2
3161 sections together resulting in larger offsets). */
3162 bfd_vma addend;
3163
3164 /* The .got2 section. */
3165 asection *sec;
3166
3167 /* PLT refcount or offset. */
3168 union
3169 {
3170 bfd_signed_vma refcount;
3171 bfd_vma offset;
3172 } plt;
3173
3174 /* .glink stub offset. */
3175 bfd_vma glink_offset;
3176 };
3177
3178 /* Of those relocs that might be copied as dynamic relocs, this function
3179 selects those that must be copied when linking a shared library,
3180 even when the symbol is local. */
3181
3182 static int
3183 must_be_dyn_reloc (struct bfd_link_info *info,
3184 enum elf_ppc_reloc_type r_type)
3185 {
3186 switch (r_type)
3187 {
3188 default:
3189 return 1;
3190
3191 case R_PPC_REL24:
3192 case R_PPC_REL14:
3193 case R_PPC_REL14_BRTAKEN:
3194 case R_PPC_REL14_BRNTAKEN:
3195 case R_PPC_REL32:
3196 return 0;
3197
3198 case R_PPC_TPREL32:
3199 case R_PPC_TPREL16:
3200 case R_PPC_TPREL16_LO:
3201 case R_PPC_TPREL16_HI:
3202 case R_PPC_TPREL16_HA:
3203 return !bfd_link_executable (info);
3204 }
3205 }
3206
3207 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3208 copying dynamic variables from a shared lib into an app's dynbss
3209 section, and instead use a dynamic relocation to point into the
3210 shared lib. */
3211 #define ELIMINATE_COPY_RELOCS 1
3212
3213 /* Used to track dynamic relocations for local symbols. */
3214 struct ppc_dyn_relocs
3215 {
3216 struct ppc_dyn_relocs *next;
3217
3218 /* The input section of the reloc. */
3219 asection *sec;
3220
3221 /* Total number of relocs copied for the input section. */
3222 unsigned int count : 31;
3223
3224 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3225 unsigned int ifunc : 1;
3226 };
3227
3228 /* PPC ELF linker hash entry. */
3229
3230 struct ppc_elf_link_hash_entry
3231 {
3232 struct elf_link_hash_entry elf;
3233
3234 /* If this symbol is used in the linker created sections, the processor
3235 specific backend uses this field to map the field into the offset
3236 from the beginning of the section. */
3237 elf_linker_section_pointers_t *linker_section_pointer;
3238
3239 /* Track dynamic relocs copied for this symbol. */
3240 struct elf_dyn_relocs *dyn_relocs;
3241
3242 /* Contexts in which symbol is used in the GOT (or TOC).
3243 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3244 corresponding relocs are encountered during check_relocs.
3245 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3246 indicate the corresponding GOT entry type is not needed. */
3247 #define TLS_GD 1 /* GD reloc. */
3248 #define TLS_LD 2 /* LD reloc. */
3249 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3250 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3251 #define TLS_TLS 16 /* Any TLS reloc. */
3252 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3253 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3254 char tls_mask;
3255
3256 /* Nonzero if we have seen a small data relocation referring to this
3257 symbol. */
3258 unsigned char has_sda_refs : 1;
3259
3260 /* Flag use of given relocations. */
3261 unsigned char has_addr16_ha : 1;
3262 unsigned char has_addr16_lo : 1;
3263 };
3264
3265 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3266
3267 /* PPC ELF linker hash table. */
3268
3269 struct ppc_elf_link_hash_table
3270 {
3271 struct elf_link_hash_table elf;
3272
3273 /* Various options passed from the linker. */
3274 struct ppc_elf_params *params;
3275
3276 /* Short-cuts to get to dynamic linker sections. */
3277 asection *got;
3278 asection *relgot;
3279 asection *glink;
3280 asection *plt;
3281 asection *relplt;
3282 asection *iplt;
3283 asection *reliplt;
3284 asection *dynbss;
3285 asection *relbss;
3286 asection *dynsbss;
3287 asection *relsbss;
3288 elf_linker_section_t sdata[2];
3289 asection *sbss;
3290 asection *glink_eh_frame;
3291
3292 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3293 asection *srelplt2;
3294
3295 /* The .got.plt section (VxWorks only)*/
3296 asection *sgotplt;
3297
3298 /* Shortcut to __tls_get_addr. */
3299 struct elf_link_hash_entry *tls_get_addr;
3300
3301 /* The bfd that forced an old-style PLT. */
3302 bfd *old_bfd;
3303
3304 /* TLS local dynamic got entry handling. */
3305 union {
3306 bfd_signed_vma refcount;
3307 bfd_vma offset;
3308 } tlsld_got;
3309
3310 /* Offset of branch table to PltResolve function in glink. */
3311 bfd_vma glink_pltresolve;
3312
3313 /* Size of reserved GOT entries. */
3314 unsigned int got_header_size;
3315 /* Non-zero if allocating the header left a gap. */
3316 unsigned int got_gap;
3317
3318 /* The type of PLT we have chosen to use. */
3319 enum ppc_elf_plt_type plt_type;
3320
3321 /* True if the target system is VxWorks. */
3322 unsigned int is_vxworks:1;
3323
3324 /* The size of PLT entries. */
3325 int plt_entry_size;
3326 /* The distance between adjacent PLT slots. */
3327 int plt_slot_size;
3328 /* The size of the first PLT entry. */
3329 int plt_initial_entry_size;
3330
3331 /* Small local sym cache. */
3332 struct sym_cache sym_cache;
3333 };
3334
3335 /* Rename some of the generic section flags to better document how they
3336 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3337
3338 /* Nonzero if this section has TLS related relocations. */
3339 #define has_tls_reloc sec_flg0
3340
3341 /* Nonzero if this section has a call to __tls_get_addr. */
3342 #define has_tls_get_addr_call sec_flg1
3343
3344 /* Get the PPC ELF linker hash table from a link_info structure. */
3345
3346 #define ppc_elf_hash_table(p) \
3347 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3348 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3349
3350 /* Create an entry in a PPC ELF linker hash table. */
3351
3352 static struct bfd_hash_entry *
3353 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3354 struct bfd_hash_table *table,
3355 const char *string)
3356 {
3357 /* Allocate the structure if it has not already been allocated by a
3358 subclass. */
3359 if (entry == NULL)
3360 {
3361 entry = bfd_hash_allocate (table,
3362 sizeof (struct ppc_elf_link_hash_entry));
3363 if (entry == NULL)
3364 return entry;
3365 }
3366
3367 /* Call the allocation method of the superclass. */
3368 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3369 if (entry != NULL)
3370 {
3371 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3372 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3373 ppc_elf_hash_entry (entry)->tls_mask = 0;
3374 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3375 }
3376
3377 return entry;
3378 }
3379
3380 /* Create a PPC ELF linker hash table. */
3381
3382 static struct bfd_link_hash_table *
3383 ppc_elf_link_hash_table_create (bfd *abfd)
3384 {
3385 struct ppc_elf_link_hash_table *ret;
3386 static struct ppc_elf_params default_params
3387 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0 };
3388
3389 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3390 if (ret == NULL)
3391 return NULL;
3392
3393 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3394 ppc_elf_link_hash_newfunc,
3395 sizeof (struct ppc_elf_link_hash_entry),
3396 PPC32_ELF_DATA))
3397 {
3398 free (ret);
3399 return NULL;
3400 }
3401
3402 ret->elf.init_plt_refcount.refcount = 0;
3403 ret->elf.init_plt_refcount.glist = NULL;
3404 ret->elf.init_plt_offset.offset = 0;
3405 ret->elf.init_plt_offset.glist = NULL;
3406
3407 ret->params = &default_params;
3408
3409 ret->sdata[0].name = ".sdata";
3410 ret->sdata[0].sym_name = "_SDA_BASE_";
3411 ret->sdata[0].bss_name = ".sbss";
3412
3413 ret->sdata[1].name = ".sdata2";
3414 ret->sdata[1].sym_name = "_SDA2_BASE_";
3415 ret->sdata[1].bss_name = ".sbss2";
3416
3417 ret->plt_entry_size = 12;
3418 ret->plt_slot_size = 8;
3419 ret->plt_initial_entry_size = 72;
3420
3421 return &ret->elf.root;
3422 }
3423
3424 /* Hook linker params into hash table. */
3425
3426 void
3427 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3428 {
3429 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3430
3431 if (htab)
3432 htab->params = params;
3433 params->pagesize_p2 = bfd_log2 (params->pagesize);
3434 }
3435
3436 /* Create .got and the related sections. */
3437
3438 static bfd_boolean
3439 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3440 {
3441 struct ppc_elf_link_hash_table *htab;
3442 asection *s;
3443 flagword flags;
3444
3445 if (!_bfd_elf_create_got_section (abfd, info))
3446 return FALSE;
3447
3448 htab = ppc_elf_hash_table (info);
3449 htab->got = s = bfd_get_linker_section (abfd, ".got");
3450 if (s == NULL)
3451 abort ();
3452
3453 if (htab->is_vxworks)
3454 {
3455 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3456 if (!htab->sgotplt)
3457 abort ();
3458 }
3459 else
3460 {
3461 /* The powerpc .got has a blrl instruction in it. Mark it
3462 executable. */
3463 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3464 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3465 if (!bfd_set_section_flags (abfd, s, flags))
3466 return FALSE;
3467 }
3468
3469 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3470 if (!htab->relgot)
3471 abort ();
3472
3473 return TRUE;
3474 }
3475
3476 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3477 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3478 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3479
3480 static bfd_boolean
3481 ppc_elf_create_linker_section (bfd *abfd,
3482 struct bfd_link_info *info,
3483 flagword flags,
3484 elf_linker_section_t *lsect)
3485 {
3486 asection *s;
3487
3488 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3489 | SEC_LINKER_CREATED);
3490
3491 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3492 if (s == NULL)
3493 return FALSE;
3494 lsect->section = s;
3495
3496 /* Define the sym on the first section of this name. */
3497 s = bfd_get_section_by_name (abfd, lsect->name);
3498
3499 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3500 if (lsect->sym == NULL)
3501 return FALSE;
3502 lsect->sym->root.u.def.value = 0x8000;
3503 return TRUE;
3504 }
3505
3506 static bfd_boolean
3507 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3508 {
3509 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3510 asection *s;
3511 flagword flags;
3512
3513 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3514 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3515 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3516 htab->glink = s;
3517 if (s == NULL
3518 || !bfd_set_section_alignment (abfd, s,
3519 htab->params->ppc476_workaround ? 6 : 4))
3520 return FALSE;
3521
3522 if (!info->no_ld_generated_unwind_info)
3523 {
3524 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3525 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3526 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3527 htab->glink_eh_frame = s;
3528 if (s == NULL
3529 || !bfd_set_section_alignment (abfd, s, 2))
3530 return FALSE;
3531 }
3532
3533 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3534 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3535 htab->iplt = s;
3536 if (s == NULL
3537 || !bfd_set_section_alignment (abfd, s, 4))
3538 return FALSE;
3539
3540 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3541 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3542 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3543 htab->reliplt = s;
3544 if (s == NULL
3545 || ! bfd_set_section_alignment (abfd, s, 2))
3546 return FALSE;
3547
3548 if (!ppc_elf_create_linker_section (abfd, info, 0,
3549 &htab->sdata[0]))
3550 return FALSE;
3551
3552 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3553 &htab->sdata[1]))
3554 return FALSE;
3555
3556 return TRUE;
3557 }
3558
3559 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3560 to output sections (just like _bfd_elf_create_dynamic_sections has
3561 to create .dynbss and .rela.bss). */
3562
3563 static bfd_boolean
3564 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3565 {
3566 struct ppc_elf_link_hash_table *htab;
3567 asection *s;
3568 flagword flags;
3569
3570 htab = ppc_elf_hash_table (info);
3571
3572 if (htab->got == NULL
3573 && !ppc_elf_create_got (abfd, info))
3574 return FALSE;
3575
3576 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3577 return FALSE;
3578
3579 if (htab->glink == NULL
3580 && !ppc_elf_create_glink (abfd, info))
3581 return FALSE;
3582
3583 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3584 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3585 SEC_ALLOC | SEC_LINKER_CREATED);
3586 htab->dynsbss = s;
3587 if (s == NULL)
3588 return FALSE;
3589
3590 if (! bfd_link_pic (info))
3591 {
3592 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3593 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3594 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3595 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3596 htab->relsbss = s;
3597 if (s == NULL
3598 || ! bfd_set_section_alignment (abfd, s, 2))
3599 return FALSE;
3600 }
3601
3602 if (htab->is_vxworks
3603 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3604 return FALSE;
3605
3606 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3607 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3608 if (s == NULL)
3609 abort ();
3610
3611 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3612 if (htab->plt_type == PLT_VXWORKS)
3613 /* The VxWorks PLT is a loaded section with contents. */
3614 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3615 return bfd_set_section_flags (abfd, s, flags);
3616 }
3617
3618 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3619
3620 static void
3621 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3622 struct elf_link_hash_entry *dir,
3623 struct elf_link_hash_entry *ind)
3624 {
3625 struct ppc_elf_link_hash_entry *edir, *eind;
3626
3627 edir = (struct ppc_elf_link_hash_entry *) dir;
3628 eind = (struct ppc_elf_link_hash_entry *) ind;
3629
3630 edir->tls_mask |= eind->tls_mask;
3631 edir->has_sda_refs |= eind->has_sda_refs;
3632
3633 /* If called to transfer flags for a weakdef during processing
3634 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3635 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3636 if (!(ELIMINATE_COPY_RELOCS
3637 && eind->elf.root.type != bfd_link_hash_indirect
3638 && edir->elf.dynamic_adjusted))
3639 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3640
3641 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3642 edir->elf.ref_regular |= eind->elf.ref_regular;
3643 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3644 edir->elf.needs_plt |= eind->elf.needs_plt;
3645 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3646
3647 if (eind->dyn_relocs != NULL)
3648 {
3649 if (edir->dyn_relocs != NULL)
3650 {
3651 struct elf_dyn_relocs **pp;
3652 struct elf_dyn_relocs *p;
3653
3654 /* Add reloc counts against the indirect sym to the direct sym
3655 list. Merge any entries against the same section. */
3656 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3657 {
3658 struct elf_dyn_relocs *q;
3659
3660 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3661 if (q->sec == p->sec)
3662 {
3663 q->pc_count += p->pc_count;
3664 q->count += p->count;
3665 *pp = p->next;
3666 break;
3667 }
3668 if (q == NULL)
3669 pp = &p->next;
3670 }
3671 *pp = edir->dyn_relocs;
3672 }
3673
3674 edir->dyn_relocs = eind->dyn_relocs;
3675 eind->dyn_relocs = NULL;
3676 }
3677
3678 /* If we were called to copy over info for a weak sym, that's all.
3679 You might think dyn_relocs need not be copied over; After all,
3680 both syms will be dynamic or both non-dynamic so we're just
3681 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3682 code in ppc_elf_adjust_dynamic_symbol needs to check for
3683 dyn_relocs in read-only sections, and it does so on what is the
3684 DIR sym here. */
3685 if (eind->elf.root.type != bfd_link_hash_indirect)
3686 return;
3687
3688 /* Copy over the GOT refcount entries that we may have already seen to
3689 the symbol which just became indirect. */
3690 edir->elf.got.refcount += eind->elf.got.refcount;
3691 eind->elf.got.refcount = 0;
3692
3693 /* And plt entries. */
3694 if (eind->elf.plt.plist != NULL)
3695 {
3696 if (edir->elf.plt.plist != NULL)
3697 {
3698 struct plt_entry **entp;
3699 struct plt_entry *ent;
3700
3701 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3702 {
3703 struct plt_entry *dent;
3704
3705 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3706 if (dent->sec == ent->sec && dent->addend == ent->addend)
3707 {
3708 dent->plt.refcount += ent->plt.refcount;
3709 *entp = ent->next;
3710 break;
3711 }
3712 if (dent == NULL)
3713 entp = &ent->next;
3714 }
3715 *entp = edir->elf.plt.plist;
3716 }
3717
3718 edir->elf.plt.plist = eind->elf.plt.plist;
3719 eind->elf.plt.plist = NULL;
3720 }
3721
3722 if (eind->elf.dynindx != -1)
3723 {
3724 if (edir->elf.dynindx != -1)
3725 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3726 edir->elf.dynstr_index);
3727 edir->elf.dynindx = eind->elf.dynindx;
3728 edir->elf.dynstr_index = eind->elf.dynstr_index;
3729 eind->elf.dynindx = -1;
3730 eind->elf.dynstr_index = 0;
3731 }
3732 }
3733
3734 /* Hook called by the linker routine which adds symbols from an object
3735 file. We use it to put .comm items in .sbss, and not .bss. */
3736
3737 static bfd_boolean
3738 ppc_elf_add_symbol_hook (bfd *abfd,
3739 struct bfd_link_info *info,
3740 Elf_Internal_Sym *sym,
3741 const char **namep ATTRIBUTE_UNUSED,
3742 flagword *flagsp ATTRIBUTE_UNUSED,
3743 asection **secp,
3744 bfd_vma *valp)
3745 {
3746 if (sym->st_shndx == SHN_COMMON
3747 && !bfd_link_relocatable (info)
3748 && is_ppc_elf (info->output_bfd)
3749 && sym->st_size <= elf_gp_size (abfd))
3750 {
3751 /* Common symbols less than or equal to -G nn bytes are automatically
3752 put into .sbss. */
3753 struct ppc_elf_link_hash_table *htab;
3754
3755 htab = ppc_elf_hash_table (info);
3756 if (htab->sbss == NULL)
3757 {
3758 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3759
3760 if (!htab->elf.dynobj)
3761 htab->elf.dynobj = abfd;
3762
3763 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3764 ".sbss",
3765 flags);
3766 if (htab->sbss == NULL)
3767 return FALSE;
3768 }
3769
3770 *secp = htab->sbss;
3771 *valp = sym->st_size;
3772 }
3773
3774 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3775 && (abfd->flags & DYNAMIC) == 0
3776 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3777 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3778
3779 return TRUE;
3780 }
3781 \f
3782 /* Find a linker generated pointer with a given addend and type. */
3783
3784 static elf_linker_section_pointers_t *
3785 elf_find_pointer_linker_section
3786 (elf_linker_section_pointers_t *linker_pointers,
3787 bfd_vma addend,
3788 elf_linker_section_t *lsect)
3789 {
3790 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3791 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3792 return linker_pointers;
3793
3794 return NULL;
3795 }
3796
3797 /* Allocate a pointer to live in a linker created section. */
3798
3799 static bfd_boolean
3800 elf_allocate_pointer_linker_section (bfd *abfd,
3801 elf_linker_section_t *lsect,
3802 struct elf_link_hash_entry *h,
3803 const Elf_Internal_Rela *rel)
3804 {
3805 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3806 elf_linker_section_pointers_t *linker_section_ptr;
3807 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3808 bfd_size_type amt;
3809
3810 BFD_ASSERT (lsect != NULL);
3811
3812 /* Is this a global symbol? */
3813 if (h != NULL)
3814 {
3815 struct ppc_elf_link_hash_entry *eh;
3816
3817 /* Has this symbol already been allocated? If so, our work is done. */
3818 eh = (struct ppc_elf_link_hash_entry *) h;
3819 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3820 rel->r_addend,
3821 lsect))
3822 return TRUE;
3823
3824 ptr_linker_section_ptr = &eh->linker_section_pointer;
3825 }
3826 else
3827 {
3828 BFD_ASSERT (is_ppc_elf (abfd));
3829
3830 /* Allocation of a pointer to a local symbol. */
3831 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3832
3833 /* Allocate a table to hold the local symbols if first time. */
3834 if (!ptr)
3835 {
3836 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3837
3838 amt = num_symbols;
3839 amt *= sizeof (elf_linker_section_pointers_t *);
3840 ptr = bfd_zalloc (abfd, amt);
3841
3842 if (!ptr)
3843 return FALSE;
3844
3845 elf_local_ptr_offsets (abfd) = ptr;
3846 }
3847
3848 /* Has this symbol already been allocated? If so, our work is done. */
3849 if (elf_find_pointer_linker_section (ptr[r_symndx],
3850 rel->r_addend,
3851 lsect))
3852 return TRUE;
3853
3854 ptr_linker_section_ptr = &ptr[r_symndx];
3855 }
3856
3857 /* Allocate space for a pointer in the linker section, and allocate
3858 a new pointer record from internal memory. */
3859 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3860 amt = sizeof (elf_linker_section_pointers_t);
3861 linker_section_ptr = bfd_alloc (abfd, amt);
3862
3863 if (!linker_section_ptr)
3864 return FALSE;
3865
3866 linker_section_ptr->next = *ptr_linker_section_ptr;
3867 linker_section_ptr->addend = rel->r_addend;
3868 linker_section_ptr->lsect = lsect;
3869 *ptr_linker_section_ptr = linker_section_ptr;
3870
3871 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3872 return FALSE;
3873 linker_section_ptr->offset = lsect->section->size;
3874 lsect->section->size += 4;
3875
3876 #ifdef DEBUG
3877 fprintf (stderr,
3878 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3879 lsect->name, (long) linker_section_ptr->offset,
3880 (long) lsect->section->size);
3881 #endif
3882
3883 return TRUE;
3884 }
3885
3886 static struct plt_entry **
3887 update_local_sym_info (bfd *abfd,
3888 Elf_Internal_Shdr *symtab_hdr,
3889 unsigned long r_symndx,
3890 int tls_type)
3891 {
3892 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3893 struct plt_entry **local_plt;
3894 char *local_got_tls_masks;
3895
3896 if (local_got_refcounts == NULL)
3897 {
3898 bfd_size_type size = symtab_hdr->sh_info;
3899
3900 size *= (sizeof (*local_got_refcounts)
3901 + sizeof (*local_plt)
3902 + sizeof (*local_got_tls_masks));
3903 local_got_refcounts = bfd_zalloc (abfd, size);
3904 if (local_got_refcounts == NULL)
3905 return NULL;
3906 elf_local_got_refcounts (abfd) = local_got_refcounts;
3907 }
3908
3909 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3910 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3911 local_got_tls_masks[r_symndx] |= tls_type;
3912 if (tls_type != PLT_IFUNC)
3913 local_got_refcounts[r_symndx] += 1;
3914 return local_plt + r_symndx;
3915 }
3916
3917 static bfd_boolean
3918 update_plt_info (bfd *abfd, struct plt_entry **plist,
3919 asection *sec, bfd_vma addend)
3920 {
3921 struct plt_entry *ent;
3922
3923 if (addend < 32768)
3924 sec = NULL;
3925 for (ent = *plist; ent != NULL; ent = ent->next)
3926 if (ent->sec == sec && ent->addend == addend)
3927 break;
3928 if (ent == NULL)
3929 {
3930 bfd_size_type amt = sizeof (*ent);
3931 ent = bfd_alloc (abfd, amt);
3932 if (ent == NULL)
3933 return FALSE;
3934 ent->next = *plist;
3935 ent->sec = sec;
3936 ent->addend = addend;
3937 ent->plt.refcount = 0;
3938 *plist = ent;
3939 }
3940 ent->plt.refcount += 1;
3941 return TRUE;
3942 }
3943
3944 static struct plt_entry *
3945 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3946 {
3947 struct plt_entry *ent;
3948
3949 if (addend < 32768)
3950 sec = NULL;
3951 for (ent = *plist; ent != NULL; ent = ent->next)
3952 if (ent->sec == sec && ent->addend == addend)
3953 break;
3954 return ent;
3955 }
3956
3957 static bfd_boolean
3958 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3959 {
3960 return (r_type == R_PPC_PLTREL24
3961 || r_type == R_PPC_LOCAL24PC
3962 || r_type == R_PPC_REL24
3963 || r_type == R_PPC_REL14
3964 || r_type == R_PPC_REL14_BRTAKEN
3965 || r_type == R_PPC_REL14_BRNTAKEN
3966 || r_type == R_PPC_ADDR24
3967 || r_type == R_PPC_ADDR14
3968 || r_type == R_PPC_ADDR14_BRTAKEN
3969 || r_type == R_PPC_ADDR14_BRNTAKEN
3970 || r_type == R_PPC_VLE_REL24);
3971 }
3972
3973 static void
3974 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3975 {
3976 _bfd_error_handler
3977 /* xgettext:c-format */
3978 (_("%B: relocation %s cannot be used when making a shared object"),
3979 abfd,
3980 ppc_elf_howto_table[r_type]->name);
3981 bfd_set_error (bfd_error_bad_value);
3982 }
3983
3984 /* Look through the relocs for a section during the first phase, and
3985 allocate space in the global offset table or procedure linkage
3986 table. */
3987
3988 static bfd_boolean
3989 ppc_elf_check_relocs (bfd *abfd,
3990 struct bfd_link_info *info,
3991 asection *sec,
3992 const Elf_Internal_Rela *relocs)
3993 {
3994 struct ppc_elf_link_hash_table *htab;
3995 Elf_Internal_Shdr *symtab_hdr;
3996 struct elf_link_hash_entry **sym_hashes;
3997 const Elf_Internal_Rela *rel;
3998 const Elf_Internal_Rela *rel_end;
3999 asection *got2, *sreloc;
4000 struct elf_link_hash_entry *tga;
4001
4002 if (bfd_link_relocatable (info))
4003 return TRUE;
4004
4005 /* Don't do anything special with non-loaded, non-alloced sections.
4006 In particular, any relocs in such sections should not affect GOT
4007 and PLT reference counting (ie. we don't allow them to create GOT
4008 or PLT entries), there's no possibility or desire to optimize TLS
4009 relocs, and there's not much point in propagating relocs to shared
4010 libs that the dynamic linker won't relocate. */
4011 if ((sec->flags & SEC_ALLOC) == 0)
4012 return TRUE;
4013
4014 #ifdef DEBUG
4015 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
4016 sec, abfd);
4017 #endif
4018
4019 BFD_ASSERT (is_ppc_elf (abfd));
4020
4021 /* Initialize howto table if not already done. */
4022 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4023 ppc_elf_howto_init ();
4024
4025 htab = ppc_elf_hash_table (info);
4026 if (htab->glink == NULL)
4027 {
4028 if (htab->elf.dynobj == NULL)
4029 htab->elf.dynobj = abfd;
4030 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4031 return FALSE;
4032 }
4033 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4034 FALSE, FALSE, TRUE);
4035 symtab_hdr = &elf_symtab_hdr (abfd);
4036 sym_hashes = elf_sym_hashes (abfd);
4037 got2 = bfd_get_section_by_name (abfd, ".got2");
4038 sreloc = NULL;
4039
4040 rel_end = relocs + sec->reloc_count;
4041 for (rel = relocs; rel < rel_end; rel++)
4042 {
4043 unsigned long r_symndx;
4044 enum elf_ppc_reloc_type r_type;
4045 struct elf_link_hash_entry *h;
4046 int tls_type;
4047 struct plt_entry **ifunc;
4048
4049 r_symndx = ELF32_R_SYM (rel->r_info);
4050 if (r_symndx < symtab_hdr->sh_info)
4051 h = NULL;
4052 else
4053 {
4054 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4055 while (h->root.type == bfd_link_hash_indirect
4056 || h->root.type == bfd_link_hash_warning)
4057 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4058
4059 /* PR15323, ref flags aren't set for references in the same
4060 object. */
4061 h->root.non_ir_ref = 1;
4062 }
4063
4064 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4065 This shows up in particular in an R_PPC_ADDR32 in the eabi
4066 startup code. */
4067 if (h != NULL
4068 && htab->got == NULL
4069 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4070 {
4071 if (htab->elf.dynobj == NULL)
4072 htab->elf.dynobj = abfd;
4073 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4074 return FALSE;
4075 BFD_ASSERT (h == htab->elf.hgot);
4076 }
4077
4078 tls_type = 0;
4079 r_type = ELF32_R_TYPE (rel->r_info);
4080 ifunc = NULL;
4081 if (h == NULL && !htab->is_vxworks)
4082 {
4083 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4084 abfd, r_symndx);
4085 if (isym == NULL)
4086 return FALSE;
4087
4088 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4089 {
4090 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4091 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4092 PLT_IFUNC);
4093 if (ifunc == NULL)
4094 return FALSE;
4095
4096 /* STT_GNU_IFUNC symbols must have a PLT entry;
4097 In a non-pie executable even when there are
4098 no plt calls. */
4099 if (!bfd_link_pic (info)
4100 || is_branch_reloc (r_type))
4101 {
4102 bfd_vma addend = 0;
4103 if (r_type == R_PPC_PLTREL24)
4104 {
4105 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4106 if (bfd_link_pic (info))
4107 addend = rel->r_addend;
4108 }
4109 if (!update_plt_info (abfd, ifunc, got2, addend))
4110 return FALSE;
4111 }
4112 }
4113 }
4114
4115 if (!htab->is_vxworks
4116 && is_branch_reloc (r_type)
4117 && h != NULL
4118 && h == tga)
4119 {
4120 if (rel != relocs
4121 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4122 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4123 /* We have a new-style __tls_get_addr call with a marker
4124 reloc. */
4125 ;
4126 else
4127 /* Mark this section as having an old-style call. */
4128 sec->has_tls_get_addr_call = 1;
4129 }
4130
4131 switch (r_type)
4132 {
4133 case R_PPC_TLSGD:
4134 case R_PPC_TLSLD:
4135 /* These special tls relocs tie a call to __tls_get_addr with
4136 its parameter symbol. */
4137 break;
4138
4139 case R_PPC_GOT_TLSLD16:
4140 case R_PPC_GOT_TLSLD16_LO:
4141 case R_PPC_GOT_TLSLD16_HI:
4142 case R_PPC_GOT_TLSLD16_HA:
4143 tls_type = TLS_TLS | TLS_LD;
4144 goto dogottls;
4145
4146 case R_PPC_GOT_TLSGD16:
4147 case R_PPC_GOT_TLSGD16_LO:
4148 case R_PPC_GOT_TLSGD16_HI:
4149 case R_PPC_GOT_TLSGD16_HA:
4150 tls_type = TLS_TLS | TLS_GD;
4151 goto dogottls;
4152
4153 case R_PPC_GOT_TPREL16:
4154 case R_PPC_GOT_TPREL16_LO:
4155 case R_PPC_GOT_TPREL16_HI:
4156 case R_PPC_GOT_TPREL16_HA:
4157 if (bfd_link_pic (info))
4158 info->flags |= DF_STATIC_TLS;
4159 tls_type = TLS_TLS | TLS_TPREL;
4160 goto dogottls;
4161
4162 case R_PPC_GOT_DTPREL16:
4163 case R_PPC_GOT_DTPREL16_LO:
4164 case R_PPC_GOT_DTPREL16_HI:
4165 case R_PPC_GOT_DTPREL16_HA:
4166 tls_type = TLS_TLS | TLS_DTPREL;
4167 dogottls:
4168 sec->has_tls_reloc = 1;
4169 /* Fall through. */
4170
4171 /* GOT16 relocations */
4172 case R_PPC_GOT16:
4173 case R_PPC_GOT16_LO:
4174 case R_PPC_GOT16_HI:
4175 case R_PPC_GOT16_HA:
4176 /* This symbol requires a global offset table entry. */
4177 if (htab->got == NULL)
4178 {
4179 if (htab->elf.dynobj == NULL)
4180 htab->elf.dynobj = abfd;
4181 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4182 return FALSE;
4183 }
4184 if (h != NULL)
4185 {
4186 h->got.refcount += 1;
4187 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4188 }
4189 else
4190 /* This is a global offset table entry for a local symbol. */
4191 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4192 return FALSE;
4193
4194 /* We may also need a plt entry if the symbol turns out to be
4195 an ifunc. */
4196 if (h != NULL && !bfd_link_pic (info))
4197 {
4198 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4199 return FALSE;
4200 }
4201 break;
4202
4203 /* Indirect .sdata relocation. */
4204 case R_PPC_EMB_SDAI16:
4205 if (bfd_link_pic (info))
4206 {
4207 bad_shared_reloc (abfd, r_type);
4208 return FALSE;
4209 }
4210 htab->sdata[0].sym->ref_regular = 1;
4211 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
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 /* Indirect .sdata2 relocation. */
4222 case R_PPC_EMB_SDA2I16:
4223 if (bfd_link_pic (info))
4224 {
4225 bad_shared_reloc (abfd, r_type);
4226 return FALSE;
4227 }
4228 htab->sdata[1].sym->ref_regular = 1;
4229 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4230 h, rel))
4231 return FALSE;
4232 if (h != NULL)
4233 {
4234 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4235 h->non_got_ref = TRUE;
4236 }
4237 break;
4238
4239 case R_PPC_SDAREL16:
4240 htab->sdata[0].sym->ref_regular = 1;
4241 /* Fall through. */
4242
4243 case R_PPC_VLE_SDAREL_LO16A:
4244 case R_PPC_VLE_SDAREL_LO16D:
4245 case R_PPC_VLE_SDAREL_HI16A:
4246 case R_PPC_VLE_SDAREL_HI16D:
4247 case R_PPC_VLE_SDAREL_HA16A:
4248 case R_PPC_VLE_SDAREL_HA16D:
4249 if (h != NULL)
4250 {
4251 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4252 h->non_got_ref = TRUE;
4253 }
4254 break;
4255
4256 case R_PPC_VLE_REL8:
4257 case R_PPC_VLE_REL15:
4258 case R_PPC_VLE_REL24:
4259 case R_PPC_VLE_LO16A:
4260 case R_PPC_VLE_LO16D:
4261 case R_PPC_VLE_HI16A:
4262 case R_PPC_VLE_HI16D:
4263 case R_PPC_VLE_HA16A:
4264 case R_PPC_VLE_HA16D:
4265 break;
4266
4267 case R_PPC_EMB_SDA2REL:
4268 if (bfd_link_pic (info))
4269 {
4270 bad_shared_reloc (abfd, r_type);
4271 return FALSE;
4272 }
4273 htab->sdata[1].sym->ref_regular = 1;
4274 if (h != NULL)
4275 {
4276 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4277 h->non_got_ref = TRUE;
4278 }
4279 break;
4280
4281 case R_PPC_VLE_SDA21_LO:
4282 case R_PPC_VLE_SDA21:
4283 case R_PPC_EMB_SDA21:
4284 case R_PPC_EMB_RELSDA:
4285 if (bfd_link_pic (info))
4286 {
4287 bad_shared_reloc (abfd, r_type);
4288 return FALSE;
4289 }
4290 if (h != NULL)
4291 {
4292 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4293 h->non_got_ref = TRUE;
4294 }
4295 break;
4296
4297 case R_PPC_EMB_NADDR32:
4298 case R_PPC_EMB_NADDR16:
4299 case R_PPC_EMB_NADDR16_LO:
4300 case R_PPC_EMB_NADDR16_HI:
4301 case R_PPC_EMB_NADDR16_HA:
4302 if (bfd_link_pic (info))
4303 {
4304 bad_shared_reloc (abfd, r_type);
4305 return FALSE;
4306 }
4307 if (h != NULL)
4308 h->non_got_ref = TRUE;
4309 break;
4310
4311 case R_PPC_PLTREL24:
4312 if (h == NULL)
4313 break;
4314 /* Fall through */
4315 case R_PPC_PLT32:
4316 case R_PPC_PLTREL32:
4317 case R_PPC_PLT16_LO:
4318 case R_PPC_PLT16_HI:
4319 case R_PPC_PLT16_HA:
4320 #ifdef DEBUG
4321 fprintf (stderr, "Reloc requires a PLT entry\n");
4322 #endif
4323 /* This symbol requires a procedure linkage table entry. */
4324 if (h == NULL)
4325 {
4326 if (ifunc == NULL)
4327 {
4328 /* It does not make sense to have a procedure linkage
4329 table entry for a non-ifunc local symbol. */
4330 info->callbacks->einfo
4331 /* xgettext:c-format */
4332 (_("%P: %H: %s reloc against local symbol\n"),
4333 abfd, sec, rel->r_offset,
4334 ppc_elf_howto_table[r_type]->name);
4335 bfd_set_error (bfd_error_bad_value);
4336 return FALSE;
4337 }
4338 }
4339 else
4340 {
4341 bfd_vma addend = 0;
4342
4343 if (r_type == R_PPC_PLTREL24)
4344 {
4345 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4346 if (bfd_link_pic (info))
4347 addend = rel->r_addend;
4348 }
4349 h->needs_plt = 1;
4350 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4351 return FALSE;
4352 }
4353 break;
4354
4355 /* The following relocations don't need to propagate the
4356 relocation if linking a shared object since they are
4357 section relative. */
4358 case R_PPC_SECTOFF:
4359 case R_PPC_SECTOFF_LO:
4360 case R_PPC_SECTOFF_HI:
4361 case R_PPC_SECTOFF_HA:
4362 case R_PPC_DTPREL16:
4363 case R_PPC_DTPREL16_LO:
4364 case R_PPC_DTPREL16_HI:
4365 case R_PPC_DTPREL16_HA:
4366 case R_PPC_TOC16:
4367 break;
4368
4369 case R_PPC_REL16:
4370 case R_PPC_REL16_LO:
4371 case R_PPC_REL16_HI:
4372 case R_PPC_REL16_HA:
4373 case R_PPC_REL16DX_HA:
4374 ppc_elf_tdata (abfd)->has_rel16 = 1;
4375 break;
4376
4377 /* These are just markers. */
4378 case R_PPC_TLS:
4379 case R_PPC_EMB_MRKREF:
4380 case R_PPC_NONE:
4381 case R_PPC_max:
4382 case R_PPC_RELAX:
4383 case R_PPC_RELAX_PLT:
4384 case R_PPC_RELAX_PLTREL24:
4385 break;
4386
4387 /* These should only appear in dynamic objects. */
4388 case R_PPC_COPY:
4389 case R_PPC_GLOB_DAT:
4390 case R_PPC_JMP_SLOT:
4391 case R_PPC_RELATIVE:
4392 case R_PPC_IRELATIVE:
4393 break;
4394
4395 /* These aren't handled yet. We'll report an error later. */
4396 case R_PPC_ADDR30:
4397 case R_PPC_EMB_RELSEC16:
4398 case R_PPC_EMB_RELST_LO:
4399 case R_PPC_EMB_RELST_HI:
4400 case R_PPC_EMB_RELST_HA:
4401 case R_PPC_EMB_BIT_FLD:
4402 break;
4403
4404 /* This refers only to functions defined in the shared library. */
4405 case R_PPC_LOCAL24PC:
4406 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4407 {
4408 htab->plt_type = PLT_OLD;
4409 htab->old_bfd = abfd;
4410 }
4411 if (h != NULL && h->type == STT_GNU_IFUNC)
4412 {
4413 h->needs_plt = 1;
4414 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4415 return FALSE;
4416 }
4417 break;
4418
4419 /* This relocation describes the C++ object vtable hierarchy.
4420 Reconstruct it for later use during GC. */
4421 case R_PPC_GNU_VTINHERIT:
4422 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4423 return FALSE;
4424 break;
4425
4426 /* This relocation describes which C++ vtable entries are actually
4427 used. Record for later use during GC. */
4428 case R_PPC_GNU_VTENTRY:
4429 BFD_ASSERT (h != NULL);
4430 if (h != NULL
4431 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4432 return FALSE;
4433 break;
4434
4435 /* We shouldn't really be seeing these. */
4436 case R_PPC_TPREL32:
4437 case R_PPC_TPREL16:
4438 case R_PPC_TPREL16_LO:
4439 case R_PPC_TPREL16_HI:
4440 case R_PPC_TPREL16_HA:
4441 if (bfd_link_pic (info))
4442 info->flags |= DF_STATIC_TLS;
4443 goto dodyn;
4444
4445 /* Nor these. */
4446 case R_PPC_DTPMOD32:
4447 case R_PPC_DTPREL32:
4448 goto dodyn;
4449
4450 case R_PPC_REL32:
4451 if (h == NULL
4452 && got2 != NULL
4453 && (sec->flags & SEC_CODE) != 0
4454 && bfd_link_pic (info)
4455 && htab->plt_type == PLT_UNSET)
4456 {
4457 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4458 the start of a function, which assembles to a REL32
4459 reference to .got2. If we detect one of these, then
4460 force the old PLT layout because the linker cannot
4461 reliably deduce the GOT pointer value needed for
4462 PLT call stubs. */
4463 asection *s;
4464 Elf_Internal_Sym *isym;
4465
4466 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4467 abfd, r_symndx);
4468 if (isym == NULL)
4469 return FALSE;
4470
4471 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4472 if (s == got2)
4473 {
4474 htab->plt_type = PLT_OLD;
4475 htab->old_bfd = abfd;
4476 }
4477 }
4478 if (h == NULL || h == htab->elf.hgot)
4479 break;
4480 /* fall through */
4481
4482 case R_PPC_ADDR32:
4483 case R_PPC_ADDR16:
4484 case R_PPC_ADDR16_LO:
4485 case R_PPC_ADDR16_HI:
4486 case R_PPC_ADDR16_HA:
4487 case R_PPC_UADDR32:
4488 case R_PPC_UADDR16:
4489 if (h != NULL && !bfd_link_pic (info))
4490 {
4491 /* We may need a plt entry if the symbol turns out to be
4492 a function defined in a dynamic object. */
4493 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4494 return FALSE;
4495
4496 /* We may need a copy reloc too. */
4497 h->non_got_ref = 1;
4498 h->pointer_equality_needed = 1;
4499 if (r_type == R_PPC_ADDR16_HA)
4500 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4501 if (r_type == R_PPC_ADDR16_LO)
4502 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4503 }
4504 goto dodyn;
4505
4506 case R_PPC_REL24:
4507 case R_PPC_REL14:
4508 case R_PPC_REL14_BRTAKEN:
4509 case R_PPC_REL14_BRNTAKEN:
4510 if (h == NULL)
4511 break;
4512 if (h == htab->elf.hgot)
4513 {
4514 if (htab->plt_type == PLT_UNSET)
4515 {
4516 htab->plt_type = PLT_OLD;
4517 htab->old_bfd = abfd;
4518 }
4519 break;
4520 }
4521 /* fall through */
4522
4523 case R_PPC_ADDR24:
4524 case R_PPC_ADDR14:
4525 case R_PPC_ADDR14_BRTAKEN:
4526 case R_PPC_ADDR14_BRNTAKEN:
4527 if (h != NULL && !bfd_link_pic (info))
4528 {
4529 /* We may need a plt entry if the symbol turns out to be
4530 a function defined in a dynamic object. */
4531 h->needs_plt = 1;
4532 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4533 return FALSE;
4534 break;
4535 }
4536
4537 dodyn:
4538 /* If we are creating a shared library, and this is a reloc
4539 against a global symbol, or a non PC relative reloc
4540 against a local symbol, then we need to copy the reloc
4541 into the shared library. However, if we are linking with
4542 -Bsymbolic, we do not need to copy a reloc against a
4543 global symbol which is defined in an object we are
4544 including in the link (i.e., DEF_REGULAR is set). At
4545 this point we have not seen all the input files, so it is
4546 possible that DEF_REGULAR is not set now but will be set
4547 later (it is never cleared). In case of a weak definition,
4548 DEF_REGULAR may be cleared later by a strong definition in
4549 a shared library. We account for that possibility below by
4550 storing information in the dyn_relocs field of the hash
4551 table entry. A similar situation occurs when creating
4552 shared libraries and symbol visibility changes render the
4553 symbol local.
4554
4555 If on the other hand, we are creating an executable, we
4556 may need to keep relocations for symbols satisfied by a
4557 dynamic library if we manage to avoid copy relocs for the
4558 symbol. */
4559 if ((bfd_link_pic (info)
4560 && (must_be_dyn_reloc (info, r_type)
4561 || (h != NULL
4562 && (!SYMBOLIC_BIND (info, h)
4563 || h->root.type == bfd_link_hash_defweak
4564 || !h->def_regular))))
4565 || (ELIMINATE_COPY_RELOCS
4566 && !bfd_link_pic (info)
4567 && h != NULL
4568 && (h->root.type == bfd_link_hash_defweak
4569 || !h->def_regular)))
4570 {
4571 #ifdef DEBUG
4572 fprintf (stderr,
4573 "ppc_elf_check_relocs needs to "
4574 "create relocation for %s\n",
4575 (h && h->root.root.string
4576 ? h->root.root.string : "<unknown>"));
4577 #endif
4578 if (sreloc == NULL)
4579 {
4580 if (htab->elf.dynobj == NULL)
4581 htab->elf.dynobj = abfd;
4582
4583 sreloc = _bfd_elf_make_dynamic_reloc_section
4584 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4585
4586 if (sreloc == NULL)
4587 return FALSE;
4588 }
4589
4590 /* If this is a global symbol, we count the number of
4591 relocations we need for this symbol. */
4592 if (h != NULL)
4593 {
4594 struct elf_dyn_relocs *p;
4595 struct elf_dyn_relocs **rel_head;
4596
4597 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4598 p = *rel_head;
4599 if (p == NULL || p->sec != sec)
4600 {
4601 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4602 if (p == NULL)
4603 return FALSE;
4604 p->next = *rel_head;
4605 *rel_head = p;
4606 p->sec = sec;
4607 p->count = 0;
4608 p->pc_count = 0;
4609 }
4610 p->count += 1;
4611 if (!must_be_dyn_reloc (info, r_type))
4612 p->pc_count += 1;
4613 }
4614 else
4615 {
4616 /* Track dynamic relocs needed for local syms too.
4617 We really need local syms available to do this
4618 easily. Oh well. */
4619 struct ppc_dyn_relocs *p;
4620 struct ppc_dyn_relocs **rel_head;
4621 bfd_boolean is_ifunc;
4622 asection *s;
4623 void *vpp;
4624 Elf_Internal_Sym *isym;
4625
4626 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4627 abfd, r_symndx);
4628 if (isym == NULL)
4629 return FALSE;
4630
4631 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4632 if (s == NULL)
4633 s = sec;
4634
4635 vpp = &elf_section_data (s)->local_dynrel;
4636 rel_head = (struct ppc_dyn_relocs **) vpp;
4637 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4638 p = *rel_head;
4639 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4640 p = p->next;
4641 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4642 {
4643 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4644 if (p == NULL)
4645 return FALSE;
4646 p->next = *rel_head;
4647 *rel_head = p;
4648 p->sec = sec;
4649 p->ifunc = is_ifunc;
4650 p->count = 0;
4651 }
4652 p->count += 1;
4653 }
4654 }
4655
4656 break;
4657 }
4658 }
4659
4660 return TRUE;
4661 }
4662 \f
4663 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4664 and OBFD, and merge non-conflicting ones. */
4665 void
4666 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4667 {
4668 bfd *obfd = info->output_bfd;
4669 obj_attribute *in_attr, *in_attrs;
4670 obj_attribute *out_attr, *out_attrs;
4671
4672 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4673 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4674
4675 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4676 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4677
4678 if (in_attr->i != out_attr->i)
4679 {
4680 int in_fp = in_attr->i & 3;
4681 int out_fp = out_attr->i & 3;
4682
4683 if (in_fp == 0)
4684 ;
4685 else if (out_fp == 0)
4686 {
4687 out_attr->type = 1;
4688 out_attr->i ^= in_fp;
4689 }
4690 else if (out_fp != 2 && in_fp == 2)
4691 _bfd_error_handler
4692 /* xgettext:c-format */
4693 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4694 else if (out_fp == 2 && in_fp != 2)
4695 _bfd_error_handler
4696 /* xgettext:c-format */
4697 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4698 else if (out_fp == 1 && in_fp == 3)
4699 _bfd_error_handler
4700 /* xgettext:c-format */
4701 (_("Warning: %B uses double-precision hard float, "
4702 "%B uses single-precision hard float"), obfd, ibfd);
4703 else if (out_fp == 3 && in_fp == 1)
4704 _bfd_error_handler
4705 /* xgettext:c-format */
4706 (_("Warning: %B uses double-precision hard float, "
4707 "%B uses single-precision hard float"), ibfd, obfd);
4708
4709 in_fp = in_attr->i & 0xc;
4710 out_fp = out_attr->i & 0xc;
4711 if (in_fp == 0)
4712 ;
4713 else if (out_fp == 0)
4714 {
4715 out_attr->type = 1;
4716 out_attr->i ^= in_fp;
4717 }
4718 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4719 _bfd_error_handler
4720 /* xgettext:c-format */
4721 (_("Warning: %B uses 64-bit long double, "
4722 "%B uses 128-bit long double"), ibfd, obfd);
4723 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4724 _bfd_error_handler
4725 /* xgettext:c-format */
4726 (_("Warning: %B uses 64-bit long double, "
4727 "%B uses 128-bit long double"), obfd, ibfd);
4728 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4729 _bfd_error_handler
4730 /* xgettext:c-format */
4731 (_("Warning: %B uses IBM long double, "
4732 "%B uses IEEE long double"), ibfd, obfd);
4733 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4734 _bfd_error_handler
4735 /* xgettext:c-format */
4736 (_("Warning: %B uses IBM long double, "
4737 "%B uses IEEE long double"), obfd, ibfd);
4738 }
4739 }
4740
4741 /* Merge object attributes from IBFD into OBFD. Warn if
4742 there are conflicting attributes. */
4743 static bfd_boolean
4744 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4745 {
4746 bfd *obfd;
4747 obj_attribute *in_attr, *in_attrs;
4748 obj_attribute *out_attr, *out_attrs;
4749
4750 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4751
4752 obfd = info->output_bfd;
4753 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4754 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4755
4756 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4757 merge non-conflicting ones. */
4758 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4759 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4760 if (in_attr->i != out_attr->i)
4761 {
4762 int in_vec = in_attr->i & 3;
4763 int out_vec = out_attr->i & 3;
4764
4765 if (in_vec == 0)
4766 ;
4767 else if (out_vec == 0)
4768 {
4769 out_attr->type = 1;
4770 out_attr->i = in_vec;
4771 }
4772 /* For now, allow generic to transition to AltiVec or SPE
4773 without a warning. If GCC marked files with their stack
4774 alignment and used don't-care markings for files which are
4775 not affected by the vector ABI, we could warn about this
4776 case too. */
4777 else if (in_vec == 1)
4778 ;
4779 else if (out_vec == 1)
4780 {
4781 out_attr->type = 1;
4782 out_attr->i = in_vec;
4783 }
4784 else if (out_vec < in_vec)
4785 _bfd_error_handler
4786 /* xgettext:c-format */
4787 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4788 obfd, ibfd);
4789 else if (out_vec > in_vec)
4790 _bfd_error_handler
4791 /* xgettext:c-format */
4792 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4793 ibfd, obfd);
4794 }
4795
4796 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4797 and merge non-conflicting ones. */
4798 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4799 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4800 if (in_attr->i != out_attr->i)
4801 {
4802 int in_struct = in_attr->i & 3;
4803 int out_struct = out_attr->i & 3;
4804
4805 if (in_struct == 0 || in_struct == 3)
4806 ;
4807 else if (out_struct == 0)
4808 {
4809 out_attr->type = 1;
4810 out_attr->i = in_struct;
4811 }
4812 else if (out_struct < in_struct)
4813 _bfd_error_handler
4814 /* xgettext:c-format */
4815 (_("Warning: %B uses r3/r4 for small structure returns, "
4816 "%B uses memory"), obfd, ibfd);
4817 else if (out_struct > in_struct)
4818 _bfd_error_handler
4819 /* xgettext:c-format */
4820 (_("Warning: %B uses r3/r4 for small structure returns, "
4821 "%B uses memory"), ibfd, obfd);
4822 }
4823
4824 /* Merge Tag_compatibility attributes and any common GNU ones. */
4825 _bfd_elf_merge_object_attributes (ibfd, info);
4826
4827 return TRUE;
4828 }
4829
4830 /* Merge backend specific data from an object file to the output
4831 object file when linking. */
4832
4833 static bfd_boolean
4834 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4835 {
4836 bfd *obfd = info->output_bfd;
4837 flagword old_flags;
4838 flagword new_flags;
4839 bfd_boolean error;
4840
4841 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4842 return TRUE;
4843
4844 /* Check if we have the same endianness. */
4845 if (! _bfd_generic_verify_endian_match (ibfd, info))
4846 return FALSE;
4847
4848 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4849 return FALSE;
4850
4851 new_flags = elf_elfheader (ibfd)->e_flags;
4852 old_flags = elf_elfheader (obfd)->e_flags;
4853 if (!elf_flags_init (obfd))
4854 {
4855 /* First call, no flags set. */
4856 elf_flags_init (obfd) = TRUE;
4857 elf_elfheader (obfd)->e_flags = new_flags;
4858 }
4859
4860 /* Compatible flags are ok. */
4861 else if (new_flags == old_flags)
4862 ;
4863
4864 /* Incompatible flags. */
4865 else
4866 {
4867 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4868 to be linked with either. */
4869 error = FALSE;
4870 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4871 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4872 {
4873 error = TRUE;
4874 _bfd_error_handler
4875 (_("%B: compiled with -mrelocatable and linked with "
4876 "modules compiled normally"), ibfd);
4877 }
4878 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4879 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4880 {
4881 error = TRUE;
4882 _bfd_error_handler
4883 (_("%B: compiled normally and linked with "
4884 "modules compiled with -mrelocatable"), ibfd);
4885 }
4886
4887 /* The output is -mrelocatable-lib iff both the input files are. */
4888 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4889 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4890
4891 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4892 but each input file is either -mrelocatable or -mrelocatable-lib. */
4893 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4894 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4895 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4896 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4897
4898 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4899 any module uses it. */
4900 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4901
4902 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4903 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4904
4905 /* Warn about any other mismatches. */
4906 if (new_flags != old_flags)
4907 {
4908 error = TRUE;
4909 _bfd_error_handler
4910 /* xgettext:c-format */
4911 (_("%B: uses different e_flags (0x%lx) fields "
4912 "than previous modules (0x%lx)"),
4913 ibfd, (long) new_flags, (long) old_flags);
4914 }
4915
4916 if (error)
4917 {
4918 bfd_set_error (bfd_error_bad_value);
4919 return FALSE;
4920 }
4921 }
4922
4923 return TRUE;
4924 }
4925
4926 static void
4927 ppc_elf_vle_split16 (bfd *input_bfd,
4928 bfd_byte *loc,
4929 bfd_vma value,
4930 split16_format_type split16_format)
4931 {
4932 unsigned int insn, top5;
4933
4934 insn = bfd_get_32 (input_bfd, loc);
4935 top5 = value & 0xf800;
4936 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4937 insn &= (split16_format == split16a_type ? ~0x1f007ff : ~0x1f07ff);
4938 insn |= top5;
4939 insn |= value & 0x7ff;
4940 bfd_put_32 (input_bfd, insn, loc);
4941 }
4942 \f
4943 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4944 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4945 int
4946 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4947 struct bfd_link_info *info)
4948 {
4949 struct ppc_elf_link_hash_table *htab;
4950 flagword flags;
4951
4952 htab = ppc_elf_hash_table (info);
4953
4954 if (htab->plt_type == PLT_UNSET)
4955 {
4956 struct elf_link_hash_entry *h;
4957
4958 if (htab->params->plt_style == PLT_OLD)
4959 htab->plt_type = PLT_OLD;
4960 else if (bfd_link_pic (info)
4961 && htab->elf.dynamic_sections_created
4962 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4963 FALSE, FALSE, TRUE)) != NULL
4964 && (h->type == STT_FUNC
4965 || h->needs_plt)
4966 && h->ref_regular
4967 && !(SYMBOL_CALLS_LOCAL (info, h)
4968 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4969 && h->root.type == bfd_link_hash_undefweak)))
4970 {
4971 /* Profiling of shared libs (and pies) is not supported with
4972 secure plt, because ppc32 does profiling before a
4973 function prologue and a secure plt pic call stubs needs
4974 r30 to be set up. */
4975 htab->plt_type = PLT_OLD;
4976 }
4977 else
4978 {
4979 bfd *ibfd;
4980 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4981
4982 /* Look through the reloc flags left by ppc_elf_check_relocs.
4983 Use the old style bss plt if a file makes plt calls
4984 without using the new relocs, and if ld isn't given
4985 --secure-plt and we never see REL16 relocs. */
4986 if (plt_type == PLT_UNSET)
4987 plt_type = PLT_OLD;
4988 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4989 if (is_ppc_elf (ibfd))
4990 {
4991 if (ppc_elf_tdata (ibfd)->has_rel16)
4992 plt_type = PLT_NEW;
4993 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4994 {
4995 plt_type = PLT_OLD;
4996 htab->old_bfd = ibfd;
4997 break;
4998 }
4999 }
5000 htab->plt_type = plt_type;
5001 }
5002 }
5003 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5004 {
5005 if (htab->old_bfd != NULL)
5006 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5007 htab->old_bfd);
5008 else
5009 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5010 }
5011
5012 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5013
5014 if (htab->plt_type == PLT_NEW)
5015 {
5016 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5017 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5018
5019 /* The new PLT is a loaded section. */
5020 if (htab->plt != NULL
5021 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
5022 return -1;
5023
5024 /* The new GOT is not executable. */
5025 if (htab->got != NULL
5026 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
5027 return -1;
5028 }
5029 else
5030 {
5031 /* Stop an unused .glink section from affecting .text alignment. */
5032 if (htab->glink != NULL
5033 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5034 return -1;
5035 }
5036 return htab->plt_type == PLT_NEW;
5037 }
5038 \f
5039 /* Return the section that should be marked against GC for a given
5040 relocation. */
5041
5042 static asection *
5043 ppc_elf_gc_mark_hook (asection *sec,
5044 struct bfd_link_info *info,
5045 Elf_Internal_Rela *rel,
5046 struct elf_link_hash_entry *h,
5047 Elf_Internal_Sym *sym)
5048 {
5049 if (h != NULL)
5050 switch (ELF32_R_TYPE (rel->r_info))
5051 {
5052 case R_PPC_GNU_VTINHERIT:
5053 case R_PPC_GNU_VTENTRY:
5054 return NULL;
5055 }
5056
5057 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5058 }
5059
5060 /* Update the got, plt and dynamic reloc reference counts for the
5061 section being removed. */
5062
5063 static bfd_boolean
5064 ppc_elf_gc_sweep_hook (bfd *abfd,
5065 struct bfd_link_info *info,
5066 asection *sec,
5067 const Elf_Internal_Rela *relocs)
5068 {
5069 struct ppc_elf_link_hash_table *htab;
5070 Elf_Internal_Shdr *symtab_hdr;
5071 struct elf_link_hash_entry **sym_hashes;
5072 bfd_signed_vma *local_got_refcounts;
5073 const Elf_Internal_Rela *rel, *relend;
5074 asection *got2;
5075
5076 if (bfd_link_relocatable (info))
5077 return TRUE;
5078
5079 if ((sec->flags & SEC_ALLOC) == 0)
5080 return TRUE;
5081
5082 elf_section_data (sec)->local_dynrel = NULL;
5083
5084 htab = ppc_elf_hash_table (info);
5085 symtab_hdr = &elf_symtab_hdr (abfd);
5086 sym_hashes = elf_sym_hashes (abfd);
5087 local_got_refcounts = elf_local_got_refcounts (abfd);
5088 got2 = bfd_get_section_by_name (abfd, ".got2");
5089
5090 relend = relocs + sec->reloc_count;
5091 for (rel = relocs; rel < relend; rel++)
5092 {
5093 unsigned long r_symndx;
5094 enum elf_ppc_reloc_type r_type;
5095 struct elf_link_hash_entry *h = NULL;
5096
5097 r_symndx = ELF32_R_SYM (rel->r_info);
5098 if (r_symndx >= symtab_hdr->sh_info)
5099 {
5100 struct elf_dyn_relocs **pp, *p;
5101 struct ppc_elf_link_hash_entry *eh;
5102
5103 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5104 while (h->root.type == bfd_link_hash_indirect
5105 || h->root.type == bfd_link_hash_warning)
5106 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5107 eh = (struct ppc_elf_link_hash_entry *) h;
5108
5109 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5110 if (p->sec == sec)
5111 {
5112 /* Everything must go for SEC. */
5113 *pp = p->next;
5114 break;
5115 }
5116 }
5117
5118 r_type = ELF32_R_TYPE (rel->r_info);
5119 if (!htab->is_vxworks
5120 && h == NULL
5121 && local_got_refcounts != NULL
5122 && (!bfd_link_pic (info)
5123 || is_branch_reloc (r_type)))
5124 {
5125 struct plt_entry **local_plt = (struct plt_entry **)
5126 (local_got_refcounts + symtab_hdr->sh_info);
5127 char *local_got_tls_masks = (char *)
5128 (local_plt + symtab_hdr->sh_info);
5129 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5130 {
5131 struct plt_entry **ifunc = local_plt + r_symndx;
5132 bfd_vma addend = 0;
5133 struct plt_entry *ent;
5134
5135 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5136 addend = rel->r_addend;
5137 ent = find_plt_ent (ifunc, got2, addend);
5138 if (ent->plt.refcount > 0)
5139 ent->plt.refcount -= 1;
5140 continue;
5141 }
5142 }
5143
5144 switch (r_type)
5145 {
5146 case R_PPC_GOT_TLSLD16:
5147 case R_PPC_GOT_TLSLD16_LO:
5148 case R_PPC_GOT_TLSLD16_HI:
5149 case R_PPC_GOT_TLSLD16_HA:
5150 case R_PPC_GOT_TLSGD16:
5151 case R_PPC_GOT_TLSGD16_LO:
5152 case R_PPC_GOT_TLSGD16_HI:
5153 case R_PPC_GOT_TLSGD16_HA:
5154 case R_PPC_GOT_TPREL16:
5155 case R_PPC_GOT_TPREL16_LO:
5156 case R_PPC_GOT_TPREL16_HI:
5157 case R_PPC_GOT_TPREL16_HA:
5158 case R_PPC_GOT_DTPREL16:
5159 case R_PPC_GOT_DTPREL16_LO:
5160 case R_PPC_GOT_DTPREL16_HI:
5161 case R_PPC_GOT_DTPREL16_HA:
5162 case R_PPC_GOT16:
5163 case R_PPC_GOT16_LO:
5164 case R_PPC_GOT16_HI:
5165 case R_PPC_GOT16_HA:
5166 if (h != NULL)
5167 {
5168 if (h->got.refcount > 0)
5169 h->got.refcount--;
5170 if (!bfd_link_pic (info))
5171 {
5172 struct plt_entry *ent;
5173
5174 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5175 if (ent != NULL && ent->plt.refcount > 0)
5176 ent->plt.refcount -= 1;
5177 }
5178 }
5179 else if (local_got_refcounts != NULL)
5180 {
5181 if (local_got_refcounts[r_symndx] > 0)
5182 local_got_refcounts[r_symndx]--;
5183 }
5184 break;
5185
5186 case R_PPC_REL24:
5187 case R_PPC_REL14:
5188 case R_PPC_REL14_BRTAKEN:
5189 case R_PPC_REL14_BRNTAKEN:
5190 case R_PPC_REL32:
5191 if (h == NULL || h == htab->elf.hgot)
5192 break;
5193 /* Fall through. */
5194
5195 case R_PPC_ADDR32:
5196 case R_PPC_ADDR24:
5197 case R_PPC_ADDR16:
5198 case R_PPC_ADDR16_LO:
5199 case R_PPC_ADDR16_HI:
5200 case R_PPC_ADDR16_HA:
5201 case R_PPC_ADDR14:
5202 case R_PPC_ADDR14_BRTAKEN:
5203 case R_PPC_ADDR14_BRNTAKEN:
5204 case R_PPC_UADDR32:
5205 case R_PPC_UADDR16:
5206 if (bfd_link_pic (info))
5207 break;
5208 /* Fall through. */
5209
5210 case R_PPC_PLT32:
5211 case R_PPC_PLTREL24:
5212 case R_PPC_PLTREL32:
5213 case R_PPC_PLT16_LO:
5214 case R_PPC_PLT16_HI:
5215 case R_PPC_PLT16_HA:
5216 if (h != NULL)
5217 {
5218 bfd_vma addend = 0;
5219 struct plt_entry *ent;
5220
5221 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5222 addend = rel->r_addend;
5223 ent = find_plt_ent (&h->plt.plist, got2, addend);
5224 if (ent != NULL && ent->plt.refcount > 0)
5225 ent->plt.refcount -= 1;
5226 }
5227 break;
5228
5229 default:
5230 break;
5231 }
5232 }
5233 return TRUE;
5234 }
5235 \f
5236 /* Set plt output section type, htab->tls_get_addr, and call the
5237 generic ELF tls_setup function. */
5238
5239 asection *
5240 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5241 {
5242 struct ppc_elf_link_hash_table *htab;
5243
5244 htab = ppc_elf_hash_table (info);
5245 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5246 FALSE, FALSE, TRUE);
5247 if (htab->plt_type != PLT_NEW)
5248 htab->params->no_tls_get_addr_opt = TRUE;
5249
5250 if (!htab->params->no_tls_get_addr_opt)
5251 {
5252 struct elf_link_hash_entry *opt, *tga;
5253 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5254 FALSE, FALSE, TRUE);
5255 if (opt != NULL
5256 && (opt->root.type == bfd_link_hash_defined
5257 || opt->root.type == bfd_link_hash_defweak))
5258 {
5259 /* If glibc supports an optimized __tls_get_addr call stub,
5260 signalled by the presence of __tls_get_addr_opt, and we'll
5261 be calling __tls_get_addr via a plt call stub, then
5262 make __tls_get_addr point to __tls_get_addr_opt. */
5263 tga = htab->tls_get_addr;
5264 if (htab->elf.dynamic_sections_created
5265 && tga != NULL
5266 && (tga->type == STT_FUNC
5267 || tga->needs_plt)
5268 && !(SYMBOL_CALLS_LOCAL (info, tga)
5269 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5270 && tga->root.type == bfd_link_hash_undefweak)))
5271 {
5272 struct plt_entry *ent;
5273 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5274 if (ent->plt.refcount > 0)
5275 break;
5276 if (ent != NULL)
5277 {
5278 tga->root.type = bfd_link_hash_indirect;
5279 tga->root.u.i.link = &opt->root;
5280 ppc_elf_copy_indirect_symbol (info, opt, tga);
5281 opt->forced_local = 0;
5282 if (opt->dynindx != -1)
5283 {
5284 /* Use __tls_get_addr_opt in dynamic relocations. */
5285 opt->dynindx = -1;
5286 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5287 opt->dynstr_index);
5288 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5289 return FALSE;
5290 }
5291 htab->tls_get_addr = opt;
5292 }
5293 }
5294 }
5295 else
5296 htab->params->no_tls_get_addr_opt = TRUE;
5297 }
5298 if (htab->plt_type == PLT_NEW
5299 && htab->plt != NULL
5300 && htab->plt->output_section != NULL)
5301 {
5302 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5303 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5304 }
5305
5306 return _bfd_elf_tls_setup (obfd, info);
5307 }
5308
5309 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5310 HASH. */
5311
5312 static bfd_boolean
5313 branch_reloc_hash_match (const bfd *ibfd,
5314 const Elf_Internal_Rela *rel,
5315 const struct elf_link_hash_entry *hash)
5316 {
5317 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5318 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5319 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5320
5321 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5322 {
5323 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5324 struct elf_link_hash_entry *h;
5325
5326 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5327 while (h->root.type == bfd_link_hash_indirect
5328 || h->root.type == bfd_link_hash_warning)
5329 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5330 if (h == hash)
5331 return TRUE;
5332 }
5333 return FALSE;
5334 }
5335
5336 /* Run through all the TLS relocs looking for optimization
5337 opportunities. */
5338
5339 bfd_boolean
5340 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5341 struct bfd_link_info *info)
5342 {
5343 bfd *ibfd;
5344 asection *sec;
5345 struct ppc_elf_link_hash_table *htab;
5346 int pass;
5347
5348 if (!bfd_link_executable (info))
5349 return TRUE;
5350
5351 htab = ppc_elf_hash_table (info);
5352 if (htab == NULL)
5353 return FALSE;
5354
5355 /* Make two passes through the relocs. First time check that tls
5356 relocs involved in setting up a tls_get_addr call are indeed
5357 followed by such a call. If they are not, don't do any tls
5358 optimization. On the second pass twiddle tls_mask flags to
5359 notify relocate_section that optimization can be done, and
5360 adjust got and plt refcounts. */
5361 for (pass = 0; pass < 2; ++pass)
5362 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5363 {
5364 Elf_Internal_Sym *locsyms = NULL;
5365 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5366 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5367
5368 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5369 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5370 {
5371 Elf_Internal_Rela *relstart, *rel, *relend;
5372 int expecting_tls_get_addr = 0;
5373
5374 /* Read the relocations. */
5375 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5376 info->keep_memory);
5377 if (relstart == NULL)
5378 return FALSE;
5379
5380 relend = relstart + sec->reloc_count;
5381 for (rel = relstart; rel < relend; rel++)
5382 {
5383 enum elf_ppc_reloc_type r_type;
5384 unsigned long r_symndx;
5385 struct elf_link_hash_entry *h = NULL;
5386 char *tls_mask;
5387 char tls_set, tls_clear;
5388 bfd_boolean is_local;
5389 bfd_signed_vma *got_count;
5390
5391 r_symndx = ELF32_R_SYM (rel->r_info);
5392 if (r_symndx >= symtab_hdr->sh_info)
5393 {
5394 struct elf_link_hash_entry **sym_hashes;
5395
5396 sym_hashes = elf_sym_hashes (ibfd);
5397 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5398 while (h->root.type == bfd_link_hash_indirect
5399 || h->root.type == bfd_link_hash_warning)
5400 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5401 }
5402
5403 is_local = FALSE;
5404 if (h == NULL
5405 || !h->def_dynamic)
5406 is_local = TRUE;
5407
5408 r_type = ELF32_R_TYPE (rel->r_info);
5409 /* If this section has old-style __tls_get_addr calls
5410 without marker relocs, then check that each
5411 __tls_get_addr call reloc is preceded by a reloc
5412 that conceivably belongs to the __tls_get_addr arg
5413 setup insn. If we don't find matching arg setup
5414 relocs, don't do any tls optimization. */
5415 if (pass == 0
5416 && sec->has_tls_get_addr_call
5417 && h != NULL
5418 && h == htab->tls_get_addr
5419 && !expecting_tls_get_addr
5420 && is_branch_reloc (r_type))
5421 {
5422 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5423 "TLS optimization disabled\n",
5424 ibfd, sec, rel->r_offset);
5425 if (elf_section_data (sec)->relocs != relstart)
5426 free (relstart);
5427 return TRUE;
5428 }
5429
5430 expecting_tls_get_addr = 0;
5431 switch (r_type)
5432 {
5433 case R_PPC_GOT_TLSLD16:
5434 case R_PPC_GOT_TLSLD16_LO:
5435 expecting_tls_get_addr = 1;
5436 /* Fall through. */
5437
5438 case R_PPC_GOT_TLSLD16_HI:
5439 case R_PPC_GOT_TLSLD16_HA:
5440 /* These relocs should never be against a symbol
5441 defined in a shared lib. Leave them alone if
5442 that turns out to be the case. */
5443 if (!is_local)
5444 continue;
5445
5446 /* LD -> LE */
5447 tls_set = 0;
5448 tls_clear = TLS_LD;
5449 break;
5450
5451 case R_PPC_GOT_TLSGD16:
5452 case R_PPC_GOT_TLSGD16_LO:
5453 expecting_tls_get_addr = 1;
5454 /* Fall through. */
5455
5456 case R_PPC_GOT_TLSGD16_HI:
5457 case R_PPC_GOT_TLSGD16_HA:
5458 if (is_local)
5459 /* GD -> LE */
5460 tls_set = 0;
5461 else
5462 /* GD -> IE */
5463 tls_set = TLS_TLS | TLS_TPRELGD;
5464 tls_clear = TLS_GD;
5465 break;
5466
5467 case R_PPC_GOT_TPREL16:
5468 case R_PPC_GOT_TPREL16_LO:
5469 case R_PPC_GOT_TPREL16_HI:
5470 case R_PPC_GOT_TPREL16_HA:
5471 if (is_local)
5472 {
5473 /* IE -> LE */
5474 tls_set = 0;
5475 tls_clear = TLS_TPREL;
5476 break;
5477 }
5478 else
5479 continue;
5480
5481 case R_PPC_TLSGD:
5482 case R_PPC_TLSLD:
5483 expecting_tls_get_addr = 2;
5484 tls_set = 0;
5485 tls_clear = 0;
5486 break;
5487
5488 default:
5489 continue;
5490 }
5491
5492 if (pass == 0)
5493 {
5494 if (!expecting_tls_get_addr
5495 || (expecting_tls_get_addr == 1
5496 && !sec->has_tls_get_addr_call))
5497 continue;
5498
5499 if (rel + 1 < relend
5500 && branch_reloc_hash_match (ibfd, rel + 1,
5501 htab->tls_get_addr))
5502 continue;
5503
5504 /* Uh oh, we didn't find the expected call. We
5505 could just mark this symbol to exclude it
5506 from tls optimization but it's safer to skip
5507 the entire optimization. */
5508 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5509 "TLS optimization disabled\n"),
5510 ibfd, sec, rel->r_offset);
5511 if (elf_section_data (sec)->relocs != relstart)
5512 free (relstart);
5513 return TRUE;
5514 }
5515
5516 if (expecting_tls_get_addr)
5517 {
5518 struct plt_entry *ent;
5519 bfd_vma addend = 0;
5520
5521 if (bfd_link_pic (info)
5522 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5523 addend = rel[1].r_addend;
5524 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5525 got2, addend);
5526 if (ent != NULL && ent->plt.refcount > 0)
5527 ent->plt.refcount -= 1;
5528
5529 if (expecting_tls_get_addr == 2)
5530 continue;
5531 }
5532
5533 if (h != NULL)
5534 {
5535 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5536 got_count = &h->got.refcount;
5537 }
5538 else
5539 {
5540 bfd_signed_vma *lgot_refs;
5541 struct plt_entry **local_plt;
5542 char *lgot_masks;
5543
5544 if (locsyms == NULL)
5545 {
5546 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5547 if (locsyms == NULL)
5548 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5549 symtab_hdr->sh_info,
5550 0, NULL, NULL, NULL);
5551 if (locsyms == NULL)
5552 {
5553 if (elf_section_data (sec)->relocs != relstart)
5554 free (relstart);
5555 return FALSE;
5556 }
5557 }
5558 lgot_refs = elf_local_got_refcounts (ibfd);
5559 if (lgot_refs == NULL)
5560 abort ();
5561 local_plt = (struct plt_entry **)
5562 (lgot_refs + symtab_hdr->sh_info);
5563 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5564 tls_mask = &lgot_masks[r_symndx];
5565 got_count = &lgot_refs[r_symndx];
5566 }
5567
5568 if (tls_set == 0)
5569 {
5570 /* We managed to get rid of a got entry. */
5571 if (*got_count > 0)
5572 *got_count -= 1;
5573 }
5574
5575 *tls_mask |= tls_set;
5576 *tls_mask &= ~tls_clear;
5577 }
5578
5579 if (elf_section_data (sec)->relocs != relstart)
5580 free (relstart);
5581 }
5582
5583 if (locsyms != NULL
5584 && (symtab_hdr->contents != (unsigned char *) locsyms))
5585 {
5586 if (!info->keep_memory)
5587 free (locsyms);
5588 else
5589 symtab_hdr->contents = (unsigned char *) locsyms;
5590 }
5591 }
5592 return TRUE;
5593 }
5594 \f
5595 /* Return true if we have dynamic relocs that apply to read-only sections. */
5596
5597 static bfd_boolean
5598 readonly_dynrelocs (struct elf_link_hash_entry *h)
5599 {
5600 struct elf_dyn_relocs *p;
5601
5602 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5603 {
5604 asection *s = p->sec->output_section;
5605
5606 if (s != NULL
5607 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5608 == (SEC_READONLY | SEC_ALLOC)))
5609 return TRUE;
5610 }
5611 return FALSE;
5612 }
5613
5614 /* Adjust a symbol defined by a dynamic object and referenced by a
5615 regular object. The current definition is in some section of the
5616 dynamic object, but we're not including those sections. We have to
5617 change the definition to something the rest of the link can
5618 understand. */
5619
5620 static bfd_boolean
5621 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5622 struct elf_link_hash_entry *h)
5623 {
5624 struct ppc_elf_link_hash_table *htab;
5625 asection *s;
5626
5627 #ifdef DEBUG
5628 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5629 h->root.root.string);
5630 #endif
5631
5632 /* Make sure we know what is going on here. */
5633 htab = ppc_elf_hash_table (info);
5634 BFD_ASSERT (htab->elf.dynobj != NULL
5635 && (h->needs_plt
5636 || h->type == STT_GNU_IFUNC
5637 || h->u.weakdef != NULL
5638 || (h->def_dynamic
5639 && h->ref_regular
5640 && !h->def_regular)));
5641
5642 /* Deal with function syms. */
5643 if (h->type == STT_FUNC
5644 || h->type == STT_GNU_IFUNC
5645 || h->needs_plt)
5646 {
5647 /* Clear procedure linkage table information for any symbol that
5648 won't need a .plt entry. */
5649 struct plt_entry *ent;
5650 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5651 if (ent->plt.refcount > 0)
5652 break;
5653 if (ent == NULL
5654 || (h->type != STT_GNU_IFUNC
5655 && (SYMBOL_CALLS_LOCAL (info, h)
5656 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5657 && h->root.type == bfd_link_hash_undefweak))))
5658 {
5659 /* A PLT entry is not required/allowed when:
5660
5661 1. We are not using ld.so; because then the PLT entry
5662 can't be set up, so we can't use one. In this case,
5663 ppc_elf_adjust_dynamic_symbol won't even be called.
5664
5665 2. GC has rendered the entry unused.
5666
5667 3. We know for certain that a call to this symbol
5668 will go to this object, or will remain undefined. */
5669 h->plt.plist = NULL;
5670 h->needs_plt = 0;
5671 h->pointer_equality_needed = 0;
5672 }
5673 else
5674 {
5675 /* Taking a function's address in a read/write section
5676 doesn't require us to define the function symbol in the
5677 executable on a plt call stub. A dynamic reloc can
5678 be used instead. */
5679 if (h->pointer_equality_needed
5680 && h->type != STT_GNU_IFUNC
5681 && !htab->is_vxworks
5682 && !ppc_elf_hash_entry (h)->has_sda_refs
5683 && !readonly_dynrelocs (h))
5684 {
5685 h->pointer_equality_needed = 0;
5686 h->non_got_ref = 0;
5687 }
5688
5689 /* After adjust_dynamic_symbol, non_got_ref set in the
5690 non-shared case means that we have allocated space in
5691 .dynbss for the symbol and thus dyn_relocs for this
5692 symbol should be discarded.
5693 If we get here we know we are making a PLT entry for this
5694 symbol, and in an executable we'd normally resolve
5695 relocations against this symbol to the PLT entry. Allow
5696 dynamic relocs if the reference is weak, and the dynamic
5697 relocs will not cause text relocation. */
5698 else if (!h->ref_regular_nonweak
5699 && h->non_got_ref
5700 && h->type != STT_GNU_IFUNC
5701 && !htab->is_vxworks
5702 && !ppc_elf_hash_entry (h)->has_sda_refs
5703 && !readonly_dynrelocs (h))
5704 h->non_got_ref = 0;
5705 }
5706 h->protected_def = 0;
5707 return TRUE;
5708 }
5709 else
5710 h->plt.plist = NULL;
5711
5712 /* If this is a weak symbol, and there is a real definition, the
5713 processor independent code will have arranged for us to see the
5714 real definition first, and we can just use the same value. */
5715 if (h->u.weakdef != NULL)
5716 {
5717 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5718 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5719 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5720 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5721 if (ELIMINATE_COPY_RELOCS)
5722 h->non_got_ref = h->u.weakdef->non_got_ref;
5723 return TRUE;
5724 }
5725
5726 /* This is a reference to a symbol defined by a dynamic object which
5727 is not a function. */
5728
5729 /* If we are creating a shared library, we must presume that the
5730 only references to the symbol are via the global offset table.
5731 For such cases we need not do anything here; the relocations will
5732 be handled correctly by relocate_section. */
5733 if (bfd_link_pic (info))
5734 {
5735 h->protected_def = 0;
5736 return TRUE;
5737 }
5738
5739 /* If there are no references to this symbol that do not use the
5740 GOT, we don't need to generate a copy reloc. */
5741 if (!h->non_got_ref)
5742 {
5743 h->protected_def = 0;
5744 return TRUE;
5745 }
5746
5747 /* Protected variables do not work with .dynbss. The copy in
5748 .dynbss won't be used by the shared library with the protected
5749 definition for the variable. Editing to PIC, or text relocations
5750 are preferable to an incorrect program. */
5751 if (h->protected_def)
5752 {
5753 if (ELIMINATE_COPY_RELOCS
5754 && ppc_elf_hash_entry (h)->has_addr16_ha
5755 && ppc_elf_hash_entry (h)->has_addr16_lo
5756 && htab->params->pic_fixup == 0
5757 && info->disable_target_specific_optimizations <= 1)
5758 htab->params->pic_fixup = 1;
5759 h->non_got_ref = 0;
5760 return TRUE;
5761 }
5762
5763 /* If -z nocopyreloc was given, we won't generate them either. */
5764 if (info->nocopyreloc)
5765 {
5766 h->non_got_ref = 0;
5767 return TRUE;
5768 }
5769
5770 /* If we didn't find any dynamic relocs in read-only sections, then
5771 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5772 We can't do this if there are any small data relocations. This
5773 doesn't work on VxWorks, where we can not have dynamic
5774 relocations (other than copy and jump slot relocations) in an
5775 executable. */
5776 if (ELIMINATE_COPY_RELOCS
5777 && !ppc_elf_hash_entry (h)->has_sda_refs
5778 && !htab->is_vxworks
5779 && !h->def_regular
5780 && !readonly_dynrelocs (h))
5781 {
5782 h->non_got_ref = 0;
5783 return TRUE;
5784 }
5785
5786 /* We must allocate the symbol in our .dynbss section, which will
5787 become part of the .bss section of the executable. There will be
5788 an entry for this symbol in the .dynsym section. The dynamic
5789 object will contain position independent code, so all references
5790 from the dynamic object to this symbol will go through the global
5791 offset table. The dynamic linker will use the .dynsym entry to
5792 determine the address it must put in the global offset table, so
5793 both the dynamic object and the regular object will refer to the
5794 same memory location for the variable.
5795
5796 Of course, if the symbol is referenced using SDAREL relocs, we
5797 must instead allocate it in .sbss. */
5798
5799 if (ppc_elf_hash_entry (h)->has_sda_refs)
5800 s = htab->dynsbss;
5801 else
5802 s = htab->dynbss;
5803 BFD_ASSERT (s != NULL);
5804
5805 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5806 copy the initial value out of the dynamic object and into the
5807 runtime process image. We need to remember the offset into the
5808 .rela.bss section we are going to use. */
5809 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5810 {
5811 asection *srel;
5812
5813 if (ppc_elf_hash_entry (h)->has_sda_refs)
5814 srel = htab->relsbss;
5815 else
5816 srel = htab->relbss;
5817 BFD_ASSERT (srel != NULL);
5818 srel->size += sizeof (Elf32_External_Rela);
5819 h->needs_copy = 1;
5820 }
5821
5822 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5823 }
5824 \f
5825 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5826 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5827 specifying the addend on the plt relocation. For -fpic code, the sym
5828 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5829 xxxxxxxx.got2.plt_pic32.<callee>. */
5830
5831 static bfd_boolean
5832 add_stub_sym (struct plt_entry *ent,
5833 struct elf_link_hash_entry *h,
5834 struct bfd_link_info *info)
5835 {
5836 struct elf_link_hash_entry *sh;
5837 size_t len1, len2, len3;
5838 char *name;
5839 const char *stub;
5840 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5841
5842 if (bfd_link_pic (info))
5843 stub = ".plt_pic32.";
5844 else
5845 stub = ".plt_call32.";
5846
5847 len1 = strlen (h->root.root.string);
5848 len2 = strlen (stub);
5849 len3 = 0;
5850 if (ent->sec)
5851 len3 = strlen (ent->sec->name);
5852 name = bfd_malloc (len1 + len2 + len3 + 9);
5853 if (name == NULL)
5854 return FALSE;
5855 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5856 if (ent->sec)
5857 memcpy (name + 8, ent->sec->name, len3);
5858 memcpy (name + 8 + len3, stub, len2);
5859 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5860 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5861 if (sh == NULL)
5862 return FALSE;
5863 if (sh->root.type == bfd_link_hash_new)
5864 {
5865 sh->root.type = bfd_link_hash_defined;
5866 sh->root.u.def.section = htab->glink;
5867 sh->root.u.def.value = ent->glink_offset;
5868 sh->ref_regular = 1;
5869 sh->def_regular = 1;
5870 sh->ref_regular_nonweak = 1;
5871 sh->forced_local = 1;
5872 sh->non_elf = 0;
5873 sh->root.linker_def = 1;
5874 }
5875 return TRUE;
5876 }
5877
5878 /* Allocate NEED contiguous space in .got, and return the offset.
5879 Handles allocation of the got header when crossing 32k. */
5880
5881 static bfd_vma
5882 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5883 {
5884 bfd_vma where;
5885 unsigned int max_before_header;
5886
5887 if (htab->plt_type == PLT_VXWORKS)
5888 {
5889 where = htab->got->size;
5890 htab->got->size += need;
5891 }
5892 else
5893 {
5894 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5895 if (need <= htab->got_gap)
5896 {
5897 where = max_before_header - htab->got_gap;
5898 htab->got_gap -= need;
5899 }
5900 else
5901 {
5902 if (htab->got->size + need > max_before_header
5903 && htab->got->size <= max_before_header)
5904 {
5905 htab->got_gap = max_before_header - htab->got->size;
5906 htab->got->size = max_before_header + htab->got_header_size;
5907 }
5908 where = htab->got->size;
5909 htab->got->size += need;
5910 }
5911 }
5912 return where;
5913 }
5914
5915 /* Allocate space in associated reloc sections for dynamic relocs. */
5916
5917 static bfd_boolean
5918 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5919 {
5920 struct bfd_link_info *info = inf;
5921 struct ppc_elf_link_hash_entry *eh;
5922 struct ppc_elf_link_hash_table *htab;
5923 struct elf_dyn_relocs *p;
5924
5925 if (h->root.type == bfd_link_hash_indirect)
5926 return TRUE;
5927
5928 htab = ppc_elf_hash_table (info);
5929 if (htab->elf.dynamic_sections_created
5930 || h->type == STT_GNU_IFUNC)
5931 {
5932 struct plt_entry *ent;
5933 bfd_boolean doneone = FALSE;
5934 bfd_vma plt_offset = 0, glink_offset = 0;
5935 bfd_boolean dyn;
5936
5937 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5938 if (ent->plt.refcount > 0)
5939 {
5940 /* Make sure this symbol is output as a dynamic symbol. */
5941 if (h->dynindx == -1
5942 && !h->forced_local
5943 && !h->def_regular
5944 && htab->elf.dynamic_sections_created)
5945 {
5946 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5947 return FALSE;
5948 }
5949
5950 dyn = htab->elf.dynamic_sections_created;
5951 if (bfd_link_pic (info)
5952 || h->type == STT_GNU_IFUNC
5953 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5954 {
5955 asection *s = htab->plt;
5956 if (!dyn || h->dynindx == -1)
5957 s = htab->iplt;
5958
5959 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5960 {
5961 if (!doneone)
5962 {
5963 plt_offset = s->size;
5964 s->size += 4;
5965 }
5966 ent->plt.offset = plt_offset;
5967
5968 s = htab->glink;
5969 if (!doneone || bfd_link_pic (info))
5970 {
5971 glink_offset = s->size;
5972 s->size += GLINK_ENTRY_SIZE;
5973 if (h == htab->tls_get_addr
5974 && !htab->params->no_tls_get_addr_opt)
5975 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5976 }
5977 if (!doneone
5978 && !bfd_link_pic (info)
5979 && h->def_dynamic
5980 && !h->def_regular)
5981 {
5982 h->root.u.def.section = s;
5983 h->root.u.def.value = glink_offset;
5984 }
5985 ent->glink_offset = glink_offset;
5986
5987 if (htab->params->emit_stub_syms
5988 && !add_stub_sym (ent, h, info))
5989 return FALSE;
5990 }
5991 else
5992 {
5993 if (!doneone)
5994 {
5995 /* If this is the first .plt entry, make room
5996 for the special first entry. */
5997 if (s->size == 0)
5998 s->size += htab->plt_initial_entry_size;
5999
6000 /* The PowerPC PLT is actually composed of two
6001 parts, the first part is 2 words (for a load
6002 and a jump), and then there is a remaining
6003 word available at the end. */
6004 plt_offset = (htab->plt_initial_entry_size
6005 + (htab->plt_slot_size
6006 * ((s->size
6007 - htab->plt_initial_entry_size)
6008 / htab->plt_entry_size)));
6009
6010 /* If this symbol is not defined in a regular
6011 file, and we are not generating a shared
6012 library, then set the symbol to this location
6013 in the .plt. This is to avoid text
6014 relocations, and is required to make
6015 function pointers compare as equal between
6016 the normal executable and the shared library. */
6017 if (! bfd_link_pic (info)
6018 && h->def_dynamic
6019 && !h->def_regular)
6020 {
6021 h->root.u.def.section = s;
6022 h->root.u.def.value = plt_offset;
6023 }
6024
6025 /* Make room for this entry. */
6026 s->size += htab->plt_entry_size;
6027 /* After the 8192nd entry, room for two entries
6028 is allocated. */
6029 if (htab->plt_type == PLT_OLD
6030 && (s->size - htab->plt_initial_entry_size)
6031 / htab->plt_entry_size
6032 > PLT_NUM_SINGLE_ENTRIES)
6033 s->size += htab->plt_entry_size;
6034 }
6035 ent->plt.offset = plt_offset;
6036 }
6037
6038 /* We also need to make an entry in the .rela.plt section. */
6039 if (!doneone)
6040 {
6041 if (!htab->elf.dynamic_sections_created
6042 || h->dynindx == -1)
6043 htab->reliplt->size += sizeof (Elf32_External_Rela);
6044 else
6045 {
6046 htab->relplt->size += sizeof (Elf32_External_Rela);
6047
6048 if (htab->plt_type == PLT_VXWORKS)
6049 {
6050 /* Allocate space for the unloaded relocations. */
6051 if (!bfd_link_pic (info)
6052 && htab->elf.dynamic_sections_created)
6053 {
6054 if (ent->plt.offset
6055 == (bfd_vma) htab->plt_initial_entry_size)
6056 {
6057 htab->srelplt2->size
6058 += (sizeof (Elf32_External_Rela)
6059 * VXWORKS_PLTRESOLVE_RELOCS);
6060 }
6061
6062 htab->srelplt2->size
6063 += (sizeof (Elf32_External_Rela)
6064 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6065 }
6066
6067 /* Every PLT entry has an associated GOT entry in
6068 .got.plt. */
6069 htab->sgotplt->size += 4;
6070 }
6071 }
6072 doneone = TRUE;
6073 }
6074 }
6075 else
6076 ent->plt.offset = (bfd_vma) -1;
6077 }
6078 else
6079 ent->plt.offset = (bfd_vma) -1;
6080
6081 if (!doneone)
6082 {
6083 h->plt.plist = NULL;
6084 h->needs_plt = 0;
6085 }
6086 }
6087 else
6088 {
6089 h->plt.plist = NULL;
6090 h->needs_plt = 0;
6091 }
6092
6093 eh = (struct ppc_elf_link_hash_entry *) h;
6094 if (eh->elf.got.refcount > 0
6095 || (ELIMINATE_COPY_RELOCS
6096 && !eh->elf.def_regular
6097 && eh->elf.protected_def
6098 && eh->has_addr16_ha
6099 && eh->has_addr16_lo
6100 && htab->params->pic_fixup > 0))
6101 {
6102 bfd_boolean dyn;
6103 unsigned int need;
6104
6105 /* Make sure this symbol is output as a dynamic symbol. */
6106 if (eh->elf.dynindx == -1
6107 && !eh->elf.forced_local
6108 && eh->elf.type != STT_GNU_IFUNC
6109 && htab->elf.dynamic_sections_created)
6110 {
6111 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
6112 return FALSE;
6113 }
6114
6115 need = 0;
6116 if ((eh->tls_mask & TLS_TLS) != 0)
6117 {
6118 if ((eh->tls_mask & TLS_LD) != 0)
6119 {
6120 if (!eh->elf.def_dynamic)
6121 /* We'll just use htab->tlsld_got.offset. This should
6122 always be the case. It's a little odd if we have
6123 a local dynamic reloc against a non-local symbol. */
6124 htab->tlsld_got.refcount += 1;
6125 else
6126 need += 8;
6127 }
6128 if ((eh->tls_mask & TLS_GD) != 0)
6129 need += 8;
6130 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6131 need += 4;
6132 if ((eh->tls_mask & TLS_DTPREL) != 0)
6133 need += 4;
6134 }
6135 else
6136 need += 4;
6137 if (need == 0)
6138 eh->elf.got.offset = (bfd_vma) -1;
6139 else
6140 {
6141 eh->elf.got.offset = allocate_got (htab, need);
6142 dyn = htab->elf.dynamic_sections_created;
6143 if ((bfd_link_pic (info)
6144 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
6145 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
6146 || eh->elf.root.type != bfd_link_hash_undefweak))
6147 {
6148 asection *rsec = htab->relgot;
6149
6150 if (eh->elf.type == STT_GNU_IFUNC)
6151 rsec = htab->reliplt;
6152 /* All the entries we allocated need relocs.
6153 Except LD only needs one. */
6154 if ((eh->tls_mask & TLS_LD) != 0
6155 && eh->elf.def_dynamic)
6156 need -= 4;
6157 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6158 }
6159 }
6160 }
6161 else
6162 eh->elf.got.offset = (bfd_vma) -1;
6163
6164 if (eh->dyn_relocs == NULL
6165 || !htab->elf.dynamic_sections_created)
6166 return TRUE;
6167
6168 /* In the shared -Bsymbolic case, discard space allocated for
6169 dynamic pc-relative relocs against symbols which turn out to be
6170 defined in regular objects. For the normal shared case, discard
6171 space for relocs that have become local due to symbol visibility
6172 changes. */
6173
6174 if (bfd_link_pic (info))
6175 {
6176 /* Relocs that use pc_count are those that appear on a call insn,
6177 or certain REL relocs (see must_be_dyn_reloc) that can be
6178 generated via assembly. We want calls to protected symbols to
6179 resolve directly to the function rather than going via the plt.
6180 If people want function pointer comparisons to work as expected
6181 then they should avoid writing weird assembly. */
6182 if (SYMBOL_CALLS_LOCAL (info, h))
6183 {
6184 struct elf_dyn_relocs **pp;
6185
6186 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6187 {
6188 p->count -= p->pc_count;
6189 p->pc_count = 0;
6190 if (p->count == 0)
6191 *pp = p->next;
6192 else
6193 pp = &p->next;
6194 }
6195 }
6196
6197 if (htab->is_vxworks)
6198 {
6199 struct elf_dyn_relocs **pp;
6200
6201 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6202 {
6203 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6204 *pp = p->next;
6205 else
6206 pp = &p->next;
6207 }
6208 }
6209
6210 /* Discard relocs on undefined symbols that must be local. */
6211 if (eh->dyn_relocs != NULL
6212 && h->root.type == bfd_link_hash_undefined
6213 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6214 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6215 eh->dyn_relocs = NULL;
6216
6217 /* Also discard relocs on undefined weak syms with non-default
6218 visibility. */
6219 if (eh->dyn_relocs != NULL
6220 && h->root.type == bfd_link_hash_undefweak)
6221 {
6222 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6223 eh->dyn_relocs = NULL;
6224
6225 /* Make sure undefined weak symbols are output as a dynamic
6226 symbol in PIEs. */
6227 else if (h->dynindx == -1
6228 && !h->forced_local
6229 && !h->def_regular)
6230 {
6231 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6232 return FALSE;
6233 }
6234 }
6235 }
6236 else if (ELIMINATE_COPY_RELOCS)
6237 {
6238 /* For the non-shared case, discard space for relocs against
6239 symbols which turn out to need copy relocs or are not
6240 dynamic. */
6241
6242 if (!h->non_got_ref
6243 && !h->def_regular
6244 && !(h->protected_def
6245 && eh->has_addr16_ha
6246 && eh->has_addr16_lo
6247 && htab->params->pic_fixup > 0))
6248 {
6249 /* Make sure this symbol is output as a dynamic symbol.
6250 Undefined weak syms won't yet be marked as dynamic. */
6251 if (h->dynindx == -1
6252 && !h->forced_local)
6253 {
6254 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6255 return FALSE;
6256 }
6257
6258 /* If that succeeded, we know we'll be keeping all the
6259 relocs. */
6260 if (h->dynindx != -1)
6261 goto keep;
6262 }
6263
6264 eh->dyn_relocs = NULL;
6265
6266 keep: ;
6267 }
6268
6269 /* Finally, allocate space. */
6270 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6271 {
6272 asection *sreloc = elf_section_data (p->sec)->sreloc;
6273 if (eh->elf.type == STT_GNU_IFUNC)
6274 sreloc = htab->reliplt;
6275 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6276 }
6277
6278 return TRUE;
6279 }
6280
6281 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6282 read-only sections. */
6283
6284 static bfd_boolean
6285 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6286 {
6287 if (h->root.type == bfd_link_hash_indirect)
6288 return TRUE;
6289
6290 if (readonly_dynrelocs (h))
6291 {
6292 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6293
6294 /* Not an error, just cut short the traversal. */
6295 return FALSE;
6296 }
6297 return TRUE;
6298 }
6299
6300 static const unsigned char glink_eh_frame_cie[] =
6301 {
6302 0, 0, 0, 16, /* length. */
6303 0, 0, 0, 0, /* id. */
6304 1, /* CIE version. */
6305 'z', 'R', 0, /* Augmentation string. */
6306 4, /* Code alignment. */
6307 0x7c, /* Data alignment. */
6308 65, /* RA reg. */
6309 1, /* Augmentation size. */
6310 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6311 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6312 };
6313
6314 /* Set the sizes of the dynamic sections. */
6315
6316 static bfd_boolean
6317 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6318 struct bfd_link_info *info)
6319 {
6320 struct ppc_elf_link_hash_table *htab;
6321 asection *s;
6322 bfd_boolean relocs;
6323 bfd *ibfd;
6324
6325 #ifdef DEBUG
6326 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6327 #endif
6328
6329 htab = ppc_elf_hash_table (info);
6330 BFD_ASSERT (htab->elf.dynobj != NULL);
6331
6332 if (elf_hash_table (info)->dynamic_sections_created)
6333 {
6334 /* Set the contents of the .interp section to the interpreter. */
6335 if (bfd_link_executable (info) && !info->nointerp)
6336 {
6337 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6338 BFD_ASSERT (s != NULL);
6339 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6340 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6341 }
6342 }
6343
6344 if (htab->plt_type == PLT_OLD)
6345 htab->got_header_size = 16;
6346 else if (htab->plt_type == PLT_NEW)
6347 htab->got_header_size = 12;
6348
6349 /* Set up .got offsets for local syms, and space for local dynamic
6350 relocs. */
6351 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6352 {
6353 bfd_signed_vma *local_got;
6354 bfd_signed_vma *end_local_got;
6355 struct plt_entry **local_plt;
6356 struct plt_entry **end_local_plt;
6357 char *lgot_masks;
6358 bfd_size_type locsymcount;
6359 Elf_Internal_Shdr *symtab_hdr;
6360
6361 if (!is_ppc_elf (ibfd))
6362 continue;
6363
6364 for (s = ibfd->sections; s != NULL; s = s->next)
6365 {
6366 struct ppc_dyn_relocs *p;
6367
6368 for (p = ((struct ppc_dyn_relocs *)
6369 elf_section_data (s)->local_dynrel);
6370 p != NULL;
6371 p = p->next)
6372 {
6373 if (!bfd_is_abs_section (p->sec)
6374 && bfd_is_abs_section (p->sec->output_section))
6375 {
6376 /* Input section has been discarded, either because
6377 it is a copy of a linkonce section or due to
6378 linker script /DISCARD/, so we'll be discarding
6379 the relocs too. */
6380 }
6381 else if (htab->is_vxworks
6382 && strcmp (p->sec->output_section->name,
6383 ".tls_vars") == 0)
6384 {
6385 /* Relocations in vxworks .tls_vars sections are
6386 handled specially by the loader. */
6387 }
6388 else if (p->count != 0)
6389 {
6390 asection *sreloc = elf_section_data (p->sec)->sreloc;
6391 if (p->ifunc)
6392 sreloc = htab->reliplt;
6393 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6394 if ((p->sec->output_section->flags
6395 & (SEC_READONLY | SEC_ALLOC))
6396 == (SEC_READONLY | SEC_ALLOC))
6397 info->flags |= DF_TEXTREL;
6398 }
6399 }
6400 }
6401
6402 local_got = elf_local_got_refcounts (ibfd);
6403 if (!local_got)
6404 continue;
6405
6406 symtab_hdr = &elf_symtab_hdr (ibfd);
6407 locsymcount = symtab_hdr->sh_info;
6408 end_local_got = local_got + locsymcount;
6409 local_plt = (struct plt_entry **) end_local_got;
6410 end_local_plt = local_plt + locsymcount;
6411 lgot_masks = (char *) end_local_plt;
6412
6413 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6414 if (*local_got > 0)
6415 {
6416 unsigned int need = 0;
6417 if ((*lgot_masks & TLS_TLS) != 0)
6418 {
6419 if ((*lgot_masks & TLS_GD) != 0)
6420 need += 8;
6421 if ((*lgot_masks & TLS_LD) != 0)
6422 htab->tlsld_got.refcount += 1;
6423 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6424 need += 4;
6425 if ((*lgot_masks & TLS_DTPREL) != 0)
6426 need += 4;
6427 }
6428 else
6429 need += 4;
6430 if (need == 0)
6431 *local_got = (bfd_vma) -1;
6432 else
6433 {
6434 *local_got = allocate_got (htab, need);
6435 if (bfd_link_pic (info))
6436 {
6437 asection *srel = htab->relgot;
6438 if ((*lgot_masks & PLT_IFUNC) != 0)
6439 srel = htab->reliplt;
6440 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6441 }
6442 }
6443 }
6444 else
6445 *local_got = (bfd_vma) -1;
6446
6447 if (htab->is_vxworks)
6448 continue;
6449
6450 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6451 for (; local_plt < end_local_plt; ++local_plt)
6452 {
6453 struct plt_entry *ent;
6454 bfd_boolean doneone = FALSE;
6455 bfd_vma plt_offset = 0, glink_offset = 0;
6456
6457 for (ent = *local_plt; ent != NULL; ent = ent->next)
6458 if (ent->plt.refcount > 0)
6459 {
6460 s = htab->iplt;
6461
6462 if (!doneone)
6463 {
6464 plt_offset = s->size;
6465 s->size += 4;
6466 }
6467 ent->plt.offset = plt_offset;
6468
6469 s = htab->glink;
6470 if (!doneone || bfd_link_pic (info))
6471 {
6472 glink_offset = s->size;
6473 s->size += GLINK_ENTRY_SIZE;
6474 }
6475 ent->glink_offset = glink_offset;
6476
6477 if (!doneone)
6478 {
6479 htab->reliplt->size += sizeof (Elf32_External_Rela);
6480 doneone = TRUE;
6481 }
6482 }
6483 else
6484 ent->plt.offset = (bfd_vma) -1;
6485 }
6486 }
6487
6488 /* Allocate space for global sym dynamic relocs. */
6489 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6490
6491 if (htab->tlsld_got.refcount > 0)
6492 {
6493 htab->tlsld_got.offset = allocate_got (htab, 8);
6494 if (bfd_link_pic (info))
6495 htab->relgot->size += sizeof (Elf32_External_Rela);
6496 }
6497 else
6498 htab->tlsld_got.offset = (bfd_vma) -1;
6499
6500 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6501 {
6502 unsigned int g_o_t = 32768;
6503
6504 /* If we haven't allocated the header, do so now. When we get here,
6505 for old plt/got the got size will be 0 to 32764 (not allocated),
6506 or 32780 to 65536 (header allocated). For new plt/got, the
6507 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6508 if (htab->got->size <= 32768)
6509 {
6510 g_o_t = htab->got->size;
6511 if (htab->plt_type == PLT_OLD)
6512 g_o_t += 4;
6513 htab->got->size += htab->got_header_size;
6514 }
6515
6516 htab->elf.hgot->root.u.def.value = g_o_t;
6517 }
6518 if (bfd_link_pic (info))
6519 {
6520 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6521
6522 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6523 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6524 }
6525 if (info->emitrelocations)
6526 {
6527 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6528
6529 if (sda != NULL && sda->ref_regular)
6530 sda->root.u.def.section->flags |= SEC_KEEP;
6531 sda = htab->sdata[1].sym;
6532 if (sda != NULL && sda->ref_regular)
6533 sda->root.u.def.section->flags |= SEC_KEEP;
6534 }
6535
6536 if (htab->glink != NULL
6537 && htab->glink->size != 0
6538 && htab->elf.dynamic_sections_created)
6539 {
6540 htab->glink_pltresolve = htab->glink->size;
6541 /* Space for the branch table. ??? We don't need entries for
6542 non-dynamic symbols in this table. This case can arise with
6543 static ifuncs or forced local ifuncs. */
6544 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6545 /* Pad out to align the start of PLTresolve. */
6546 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6547 ? 63 : 15);
6548 htab->glink->size += GLINK_PLTRESOLVE;
6549
6550 if (htab->params->emit_stub_syms)
6551 {
6552 struct elf_link_hash_entry *sh;
6553 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6554 TRUE, FALSE, FALSE);
6555 if (sh == NULL)
6556 return FALSE;
6557 if (sh->root.type == bfd_link_hash_new)
6558 {
6559 sh->root.type = bfd_link_hash_defined;
6560 sh->root.u.def.section = htab->glink;
6561 sh->root.u.def.value = htab->glink_pltresolve;
6562 sh->ref_regular = 1;
6563 sh->def_regular = 1;
6564 sh->ref_regular_nonweak = 1;
6565 sh->forced_local = 1;
6566 sh->non_elf = 0;
6567 sh->root.linker_def = 1;
6568 }
6569 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6570 TRUE, FALSE, FALSE);
6571 if (sh == NULL)
6572 return FALSE;
6573 if (sh->root.type == bfd_link_hash_new)
6574 {
6575 sh->root.type = bfd_link_hash_defined;
6576 sh->root.u.def.section = htab->glink;
6577 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6578 sh->ref_regular = 1;
6579 sh->def_regular = 1;
6580 sh->ref_regular_nonweak = 1;
6581 sh->forced_local = 1;
6582 sh->non_elf = 0;
6583 sh->root.linker_def = 1;
6584 }
6585 }
6586 }
6587
6588 if (htab->glink != NULL
6589 && htab->glink->size != 0
6590 && htab->glink_eh_frame != NULL
6591 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6592 && _bfd_elf_eh_frame_present (info))
6593 {
6594 s = htab->glink_eh_frame;
6595 s->size = sizeof (glink_eh_frame_cie) + 20;
6596 if (bfd_link_pic (info))
6597 {
6598 s->size += 4;
6599 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6600 s->size += 4;
6601 }
6602 }
6603
6604 /* We've now determined the sizes of the various dynamic sections.
6605 Allocate memory for them. */
6606 relocs = FALSE;
6607 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6608 {
6609 bfd_boolean strip_section = TRUE;
6610
6611 if ((s->flags & SEC_LINKER_CREATED) == 0)
6612 continue;
6613
6614 if (s == htab->plt
6615 || s == htab->got)
6616 {
6617 /* We'd like to strip these sections if they aren't needed, but if
6618 we've exported dynamic symbols from them we must leave them.
6619 It's too late to tell BFD to get rid of the symbols. */
6620 if (htab->elf.hplt != NULL)
6621 strip_section = FALSE;
6622 /* Strip this section if we don't need it; see the
6623 comment below. */
6624 }
6625 else if (s == htab->iplt
6626 || s == htab->glink
6627 || s == htab->glink_eh_frame
6628 || s == htab->sgotplt
6629 || s == htab->sbss
6630 || s == htab->dynbss
6631 || s == htab->dynsbss)
6632 {
6633 /* Strip these too. */
6634 }
6635 else if (s == htab->sdata[0].section
6636 || s == htab->sdata[1].section)
6637 {
6638 strip_section = (s->flags & SEC_KEEP) == 0;
6639 }
6640 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6641 ".rela"))
6642 {
6643 if (s->size != 0)
6644 {
6645 /* Remember whether there are any relocation sections. */
6646 relocs = TRUE;
6647
6648 /* We use the reloc_count field as a counter if we need
6649 to copy relocs into the output file. */
6650 s->reloc_count = 0;
6651 }
6652 }
6653 else
6654 {
6655 /* It's not one of our sections, so don't allocate space. */
6656 continue;
6657 }
6658
6659 if (s->size == 0 && strip_section)
6660 {
6661 /* If we don't need this section, strip it from the
6662 output file. This is mostly to handle .rela.bss and
6663 .rela.plt. We must create both sections in
6664 create_dynamic_sections, because they must be created
6665 before the linker maps input sections to output
6666 sections. The linker does that before
6667 adjust_dynamic_symbol is called, and it is that
6668 function which decides whether anything needs to go
6669 into these sections. */
6670 s->flags |= SEC_EXCLUDE;
6671 continue;
6672 }
6673
6674 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6675 continue;
6676
6677 /* Allocate memory for the section contents. */
6678 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6679 if (s->contents == NULL)
6680 return FALSE;
6681 }
6682
6683 if (htab->elf.dynamic_sections_created)
6684 {
6685 /* Add some entries to the .dynamic section. We fill in the
6686 values later, in ppc_elf_finish_dynamic_sections, but we
6687 must add the entries now so that we get the correct size for
6688 the .dynamic section. The DT_DEBUG entry is filled in by the
6689 dynamic linker and used by the debugger. */
6690 #define add_dynamic_entry(TAG, VAL) \
6691 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6692
6693 if (bfd_link_executable (info))
6694 {
6695 if (!add_dynamic_entry (DT_DEBUG, 0))
6696 return FALSE;
6697 }
6698
6699 if (htab->plt != NULL && htab->plt->size != 0)
6700 {
6701 if (!add_dynamic_entry (DT_PLTGOT, 0)
6702 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6703 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6704 || !add_dynamic_entry (DT_JMPREL, 0))
6705 return FALSE;
6706 }
6707
6708 if (htab->plt_type == PLT_NEW
6709 && htab->glink != NULL
6710 && htab->glink->size != 0)
6711 {
6712 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6713 return FALSE;
6714 if (!htab->params->no_tls_get_addr_opt
6715 && htab->tls_get_addr != NULL
6716 && htab->tls_get_addr->plt.plist != NULL
6717 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6718 return FALSE;
6719 }
6720
6721 if (relocs)
6722 {
6723 if (!add_dynamic_entry (DT_RELA, 0)
6724 || !add_dynamic_entry (DT_RELASZ, 0)
6725 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6726 return FALSE;
6727 }
6728
6729 /* If any dynamic relocs apply to a read-only section, then we
6730 need a DT_TEXTREL entry. */
6731 if ((info->flags & DF_TEXTREL) == 0)
6732 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6733 info);
6734
6735 if ((info->flags & DF_TEXTREL) != 0)
6736 {
6737 if (!add_dynamic_entry (DT_TEXTREL, 0))
6738 return FALSE;
6739 }
6740 if (htab->is_vxworks
6741 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6742 return FALSE;
6743 }
6744 #undef add_dynamic_entry
6745
6746 if (htab->glink_eh_frame != NULL
6747 && htab->glink_eh_frame->contents != NULL)
6748 {
6749 unsigned char *p = htab->glink_eh_frame->contents;
6750 bfd_vma val;
6751
6752 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6753 /* CIE length (rewrite in case little-endian). */
6754 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6755 p += sizeof (glink_eh_frame_cie);
6756 /* FDE length. */
6757 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6758 bfd_put_32 (htab->elf.dynobj, val, p);
6759 p += 4;
6760 /* CIE pointer. */
6761 val = p - htab->glink_eh_frame->contents;
6762 bfd_put_32 (htab->elf.dynobj, val, p);
6763 p += 4;
6764 /* Offset to .glink. Set later. */
6765 p += 4;
6766 /* .glink size. */
6767 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6768 p += 4;
6769 /* Augmentation. */
6770 p += 1;
6771
6772 if (bfd_link_pic (info)
6773 && htab->elf.dynamic_sections_created)
6774 {
6775 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6776 if (adv < 64)
6777 *p++ = DW_CFA_advance_loc + adv;
6778 else if (adv < 256)
6779 {
6780 *p++ = DW_CFA_advance_loc1;
6781 *p++ = adv;
6782 }
6783 else if (adv < 65536)
6784 {
6785 *p++ = DW_CFA_advance_loc2;
6786 bfd_put_16 (htab->elf.dynobj, adv, p);
6787 p += 2;
6788 }
6789 else
6790 {
6791 *p++ = DW_CFA_advance_loc4;
6792 bfd_put_32 (htab->elf.dynobj, adv, p);
6793 p += 4;
6794 }
6795 *p++ = DW_CFA_register;
6796 *p++ = 65;
6797 p++;
6798 *p++ = DW_CFA_advance_loc + 4;
6799 *p++ = DW_CFA_restore_extended;
6800 *p++ = 65;
6801 }
6802 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6803 == htab->glink_eh_frame->size);
6804 }
6805
6806 return TRUE;
6807 }
6808
6809 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6810 if it looks like nothing is using them. */
6811
6812 static void
6813 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6814 {
6815 struct elf_link_hash_entry *sda = lsect->sym;
6816
6817 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6818 {
6819 asection *s;
6820
6821 s = bfd_get_section_by_name (output_bfd, lsect->name);
6822 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6823 {
6824 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6825 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6826 {
6827 sda->def_regular = 0;
6828 /* This is somewhat magic. See elf_link_output_extsym. */
6829 sda->ref_dynamic = 1;
6830 sda->forced_local = 0;
6831 }
6832 }
6833 }
6834 }
6835
6836 void
6837 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6838 {
6839 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6840
6841 if (htab != NULL)
6842 {
6843 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6844 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6845 }
6846 }
6847
6848
6849 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6850
6851 static bfd_boolean
6852 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6853 {
6854 if (h->plt.plist != NULL
6855 && !h->def_regular
6856 && (!h->pointer_equality_needed
6857 || !h->ref_regular_nonweak))
6858 return FALSE;
6859
6860 return _bfd_elf_hash_symbol (h);
6861 }
6862 \f
6863 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6864
6865 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6866 used for some functions that are allowed to break the ABI). */
6867 static const int shared_stub_entry[] =
6868 {
6869 0x7c0802a6, /* mflr 0 */
6870 0x429f0005, /* bcl 20, 31, .Lxxx */
6871 0x7d8802a6, /* mflr 12 */
6872 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6873 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6874 0x7c0803a6, /* mtlr 0 */
6875 0x7d8903a6, /* mtctr 12 */
6876 0x4e800420, /* bctr */
6877 };
6878
6879 static const int stub_entry[] =
6880 {
6881 0x3d800000, /* lis 12,xxx@ha */
6882 0x398c0000, /* addi 12,12,xxx@l */
6883 0x7d8903a6, /* mtctr 12 */
6884 0x4e800420, /* bctr */
6885 };
6886
6887 struct ppc_elf_relax_info
6888 {
6889 unsigned int workaround_size;
6890 unsigned int picfixup_size;
6891 };
6892
6893 /* This function implements long branch trampolines, and the ppc476
6894 icache bug workaround. Any section needing trampolines or patch
6895 space for the workaround has its size extended so that we can
6896 add trampolines at the end of the section. */
6897
6898 static bfd_boolean
6899 ppc_elf_relax_section (bfd *abfd,
6900 asection *isec,
6901 struct bfd_link_info *link_info,
6902 bfd_boolean *again)
6903 {
6904 struct one_branch_fixup
6905 {
6906 struct one_branch_fixup *next;
6907 asection *tsec;
6908 /* Final link, can use the symbol offset. For a
6909 relocatable link we use the symbol's index. */
6910 bfd_vma toff;
6911 bfd_vma trampoff;
6912 };
6913
6914 Elf_Internal_Shdr *symtab_hdr;
6915 bfd_byte *contents = NULL;
6916 Elf_Internal_Sym *isymbuf = NULL;
6917 Elf_Internal_Rela *internal_relocs = NULL;
6918 Elf_Internal_Rela *irel, *irelend = NULL;
6919 struct one_branch_fixup *branch_fixups = NULL;
6920 struct ppc_elf_relax_info *relax_info = NULL;
6921 unsigned changes = 0;
6922 bfd_boolean workaround_change;
6923 struct ppc_elf_link_hash_table *htab;
6924 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6925 asection *got2;
6926 bfd_boolean maybe_pasted;
6927
6928 *again = FALSE;
6929
6930 /* No need to do anything with non-alloc or non-code sections. */
6931 if ((isec->flags & SEC_ALLOC) == 0
6932 || (isec->flags & SEC_CODE) == 0
6933 || (isec->flags & SEC_LINKER_CREATED) != 0
6934 || isec->size < 4)
6935 return TRUE;
6936
6937 /* We cannot represent the required PIC relocs in the output, so don't
6938 do anything. The linker doesn't support mixing -shared and -r
6939 anyway. */
6940 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6941 return TRUE;
6942
6943 htab = ppc_elf_hash_table (link_info);
6944 if (htab == NULL)
6945 return TRUE;
6946
6947 isec->size = (isec->size + 3) & -4;
6948 if (isec->rawsize == 0)
6949 isec->rawsize = isec->size;
6950 trampbase = isec->size;
6951
6952 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6953 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6954 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6955
6956 if (htab->params->ppc476_workaround
6957 || htab->params->pic_fixup > 0)
6958 {
6959 if (elf_section_data (isec)->sec_info == NULL)
6960 {
6961 elf_section_data (isec)->sec_info
6962 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6963 if (elf_section_data (isec)->sec_info == NULL)
6964 return FALSE;
6965 }
6966 relax_info = elf_section_data (isec)->sec_info;
6967 trampbase -= relax_info->workaround_size;
6968 }
6969
6970 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6971 || strcmp (isec->output_section->name, ".fini") == 0);
6972 /* Space for a branch around any trampolines. */
6973 trampoff = trampbase;
6974 if (maybe_pasted && trampbase == isec->rawsize)
6975 trampoff += 4;
6976
6977 symtab_hdr = &elf_symtab_hdr (abfd);
6978 picfixup_size = 0;
6979 if (htab->params->branch_trampolines
6980 || htab->params->pic_fixup > 0)
6981 {
6982 /* Get a copy of the native relocations. */
6983 if (isec->reloc_count != 0)
6984 {
6985 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6986 link_info->keep_memory);
6987 if (internal_relocs == NULL)
6988 goto error_return;
6989 }
6990
6991 got2 = bfd_get_section_by_name (abfd, ".got2");
6992
6993 irelend = internal_relocs + isec->reloc_count;
6994 for (irel = internal_relocs; irel < irelend; irel++)
6995 {
6996 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6997 bfd_vma toff, roff;
6998 asection *tsec;
6999 struct one_branch_fixup *f;
7000 size_t insn_offset = 0;
7001 bfd_vma max_branch_offset = 0, val;
7002 bfd_byte *hit_addr;
7003 unsigned long t0;
7004 struct elf_link_hash_entry *h;
7005 struct plt_entry **plist;
7006 unsigned char sym_type;
7007
7008 switch (r_type)
7009 {
7010 case R_PPC_REL24:
7011 case R_PPC_LOCAL24PC:
7012 case R_PPC_PLTREL24:
7013 max_branch_offset = 1 << 25;
7014 break;
7015
7016 case R_PPC_REL14:
7017 case R_PPC_REL14_BRTAKEN:
7018 case R_PPC_REL14_BRNTAKEN:
7019 max_branch_offset = 1 << 15;
7020 break;
7021
7022 case R_PPC_ADDR16_HA:
7023 if (htab->params->pic_fixup > 0)
7024 break;
7025 continue;
7026
7027 default:
7028 continue;
7029 }
7030
7031 /* Get the value of the symbol referred to by the reloc. */
7032 h = NULL;
7033 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
7034 {
7035 /* A local symbol. */
7036 Elf_Internal_Sym *isym;
7037
7038 /* Read this BFD's local symbols. */
7039 if (isymbuf == NULL)
7040 {
7041 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7042 if (isymbuf == NULL)
7043 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7044 symtab_hdr->sh_info, 0,
7045 NULL, NULL, NULL);
7046 if (isymbuf == 0)
7047 goto error_return;
7048 }
7049 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7050 if (isym->st_shndx == SHN_UNDEF)
7051 tsec = bfd_und_section_ptr;
7052 else if (isym->st_shndx == SHN_ABS)
7053 tsec = bfd_abs_section_ptr;
7054 else if (isym->st_shndx == SHN_COMMON)
7055 tsec = bfd_com_section_ptr;
7056 else
7057 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7058
7059 toff = isym->st_value;
7060 sym_type = ELF_ST_TYPE (isym->st_info);
7061 }
7062 else
7063 {
7064 /* Global symbol handling. */
7065 unsigned long indx;
7066
7067 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7068 h = elf_sym_hashes (abfd)[indx];
7069
7070 while (h->root.type == bfd_link_hash_indirect
7071 || h->root.type == bfd_link_hash_warning)
7072 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7073
7074 if (h->root.type == bfd_link_hash_defined
7075 || h->root.type == bfd_link_hash_defweak)
7076 {
7077 tsec = h->root.u.def.section;
7078 toff = h->root.u.def.value;
7079 }
7080 else if (h->root.type == bfd_link_hash_undefined
7081 || h->root.type == bfd_link_hash_undefweak)
7082 {
7083 tsec = bfd_und_section_ptr;
7084 toff = bfd_link_relocatable (link_info) ? indx : 0;
7085 }
7086 else
7087 continue;
7088
7089 /* If this branch is to __tls_get_addr then we may later
7090 optimise away the call. We won't be needing a long-
7091 branch stub in that case. */
7092 if (bfd_link_executable (link_info)
7093 && h == htab->tls_get_addr
7094 && irel != internal_relocs)
7095 {
7096 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7097 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7098 unsigned int tls_mask = 0;
7099
7100 /* The previous reloc should be one of R_PPC_TLSGD or
7101 R_PPC_TLSLD, or for older object files, a reloc
7102 on the __tls_get_addr arg setup insn. Get tls
7103 mask bits from the symbol on that reloc. */
7104 if (t_symndx < symtab_hdr->sh_info)
7105 {
7106 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7107
7108 if (local_got_offsets != NULL)
7109 {
7110 struct plt_entry **local_plt = (struct plt_entry **)
7111 (local_got_offsets + symtab_hdr->sh_info);
7112 char *lgot_masks = (char *)
7113 (local_plt + symtab_hdr->sh_info);
7114 tls_mask = lgot_masks[t_symndx];
7115 }
7116 }
7117 else
7118 {
7119 struct elf_link_hash_entry *th
7120 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7121
7122 while (th->root.type == bfd_link_hash_indirect
7123 || th->root.type == bfd_link_hash_warning)
7124 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7125
7126 tls_mask
7127 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7128 }
7129
7130 /* The mask bits tell us if the call will be
7131 optimised away. */
7132 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7133 && (t_rtype == R_PPC_TLSGD
7134 || t_rtype == R_PPC_GOT_TLSGD16
7135 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7136 continue;
7137 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7138 && (t_rtype == R_PPC_TLSLD
7139 || t_rtype == R_PPC_GOT_TLSLD16
7140 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7141 continue;
7142 }
7143
7144 sym_type = h->type;
7145 }
7146
7147 if (r_type == R_PPC_ADDR16_HA)
7148 {
7149 if (h != NULL
7150 && !h->def_regular
7151 && h->protected_def
7152 && ppc_elf_hash_entry (h)->has_addr16_ha
7153 && ppc_elf_hash_entry (h)->has_addr16_lo)
7154 picfixup_size += 12;
7155 continue;
7156 }
7157
7158 /* The condition here under which we call find_plt_ent must
7159 match that in relocate_section. If we call find_plt_ent here
7160 but not in relocate_section, or vice versa, then the branch
7161 destination used here may be incorrect. */
7162 plist = NULL;
7163 if (h != NULL)
7164 {
7165 /* We know is_branch_reloc (r_type) is true. */
7166 if (h->type == STT_GNU_IFUNC
7167 || r_type == R_PPC_PLTREL24)
7168 plist = &h->plt.plist;
7169 }
7170 else if (sym_type == STT_GNU_IFUNC
7171 && elf_local_got_offsets (abfd) != NULL)
7172 {
7173 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7174 struct plt_entry **local_plt = (struct plt_entry **)
7175 (local_got_offsets + symtab_hdr->sh_info);
7176 plist = local_plt + ELF32_R_SYM (irel->r_info);
7177 }
7178 if (plist != NULL)
7179 {
7180 bfd_vma addend = 0;
7181 struct plt_entry *ent;
7182
7183 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7184 addend = irel->r_addend;
7185 ent = find_plt_ent (plist, got2, addend);
7186 if (ent != NULL)
7187 {
7188 if (htab->plt_type == PLT_NEW
7189 || h == NULL
7190 || !htab->elf.dynamic_sections_created
7191 || h->dynindx == -1)
7192 {
7193 tsec = htab->glink;
7194 toff = ent->glink_offset;
7195 }
7196 else
7197 {
7198 tsec = htab->plt;
7199 toff = ent->plt.offset;
7200 }
7201 }
7202 }
7203
7204 /* If the branch and target are in the same section, you have
7205 no hope of adding stubs. We'll error out later should the
7206 branch overflow. */
7207 if (tsec == isec)
7208 continue;
7209
7210 /* There probably isn't any reason to handle symbols in
7211 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7212 attribute for a code section, and we are only looking at
7213 branches. However, implement it correctly here as a
7214 reference for other target relax_section functions. */
7215 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7216 {
7217 /* At this stage in linking, no SEC_MERGE symbol has been
7218 adjusted, so all references to such symbols need to be
7219 passed through _bfd_merged_section_offset. (Later, in
7220 relocate_section, all SEC_MERGE symbols *except* for
7221 section symbols have been adjusted.)
7222
7223 gas may reduce relocations against symbols in SEC_MERGE
7224 sections to a relocation against the section symbol when
7225 the original addend was zero. When the reloc is against
7226 a section symbol we should include the addend in the
7227 offset passed to _bfd_merged_section_offset, since the
7228 location of interest is the original symbol. On the
7229 other hand, an access to "sym+addend" where "sym" is not
7230 a section symbol should not include the addend; Such an
7231 access is presumed to be an offset from "sym"; The
7232 location of interest is just "sym". */
7233 if (sym_type == STT_SECTION)
7234 toff += irel->r_addend;
7235
7236 toff
7237 = _bfd_merged_section_offset (abfd, &tsec,
7238 elf_section_data (tsec)->sec_info,
7239 toff);
7240
7241 if (sym_type != STT_SECTION)
7242 toff += irel->r_addend;
7243 }
7244 /* PLTREL24 addends are special. */
7245 else if (r_type != R_PPC_PLTREL24)
7246 toff += irel->r_addend;
7247
7248 /* Attempted -shared link of non-pic code loses. */
7249 if ((!bfd_link_relocatable (link_info)
7250 && tsec == bfd_und_section_ptr)
7251 || tsec->output_section == NULL
7252 || (tsec->owner != NULL
7253 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7254 continue;
7255
7256 roff = irel->r_offset;
7257
7258 /* If the branch is in range, no need to do anything. */
7259 if (tsec != bfd_und_section_ptr
7260 && (!bfd_link_relocatable (link_info)
7261 /* A relocatable link may have sections moved during
7262 final link, so do not presume they remain in range. */
7263 || tsec->output_section == isec->output_section))
7264 {
7265 bfd_vma symaddr, reladdr;
7266
7267 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7268 reladdr = isec->output_section->vma + isec->output_offset + roff;
7269 if (symaddr - reladdr + max_branch_offset
7270 < 2 * max_branch_offset)
7271 continue;
7272 }
7273
7274 /* Look for an existing fixup to this address. */
7275 for (f = branch_fixups; f ; f = f->next)
7276 if (f->tsec == tsec && f->toff == toff)
7277 break;
7278
7279 if (f == NULL)
7280 {
7281 size_t size;
7282 unsigned long stub_rtype;
7283
7284 val = trampoff - roff;
7285 if (val >= max_branch_offset)
7286 /* Oh dear, we can't reach a trampoline. Don't try to add
7287 one. We'll report an error later. */
7288 continue;
7289
7290 if (bfd_link_pic (link_info))
7291 {
7292 size = 4 * ARRAY_SIZE (shared_stub_entry);
7293 insn_offset = 12;
7294 }
7295 else
7296 {
7297 size = 4 * ARRAY_SIZE (stub_entry);
7298 insn_offset = 0;
7299 }
7300 stub_rtype = R_PPC_RELAX;
7301 if (tsec == htab->plt
7302 || tsec == htab->glink)
7303 {
7304 stub_rtype = R_PPC_RELAX_PLT;
7305 if (r_type == R_PPC_PLTREL24)
7306 stub_rtype = R_PPC_RELAX_PLTREL24;
7307 }
7308
7309 /* Hijack the old relocation. Since we need two
7310 relocations for this use a "composite" reloc. */
7311 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7312 stub_rtype);
7313 irel->r_offset = trampoff + insn_offset;
7314 if (r_type == R_PPC_PLTREL24
7315 && stub_rtype != R_PPC_RELAX_PLTREL24)
7316 irel->r_addend = 0;
7317
7318 /* Record the fixup so we don't do it again this section. */
7319 f = bfd_malloc (sizeof (*f));
7320 f->next = branch_fixups;
7321 f->tsec = tsec;
7322 f->toff = toff;
7323 f->trampoff = trampoff;
7324 branch_fixups = f;
7325
7326 trampoff += size;
7327 changes++;
7328 }
7329 else
7330 {
7331 val = f->trampoff - roff;
7332 if (val >= max_branch_offset)
7333 continue;
7334
7335 /* Nop out the reloc, since we're finalizing things here. */
7336 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7337 }
7338
7339 /* Get the section contents. */
7340 if (contents == NULL)
7341 {
7342 /* Get cached copy if it exists. */
7343 if (elf_section_data (isec)->this_hdr.contents != NULL)
7344 contents = elf_section_data (isec)->this_hdr.contents;
7345 /* Go get them off disk. */
7346 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7347 goto error_return;
7348 }
7349
7350 /* Fix up the existing branch to hit the trampoline. */
7351 hit_addr = contents + roff;
7352 switch (r_type)
7353 {
7354 case R_PPC_REL24:
7355 case R_PPC_LOCAL24PC:
7356 case R_PPC_PLTREL24:
7357 t0 = bfd_get_32 (abfd, hit_addr);
7358 t0 &= ~0x3fffffc;
7359 t0 |= val & 0x3fffffc;
7360 bfd_put_32 (abfd, t0, hit_addr);
7361 break;
7362
7363 case R_PPC_REL14:
7364 case R_PPC_REL14_BRTAKEN:
7365 case R_PPC_REL14_BRNTAKEN:
7366 t0 = bfd_get_32 (abfd, hit_addr);
7367 t0 &= ~0xfffc;
7368 t0 |= val & 0xfffc;
7369 bfd_put_32 (abfd, t0, hit_addr);
7370 break;
7371 }
7372 }
7373
7374 while (branch_fixups != NULL)
7375 {
7376 struct one_branch_fixup *f = branch_fixups;
7377 branch_fixups = branch_fixups->next;
7378 free (f);
7379 }
7380 }
7381
7382 workaround_change = FALSE;
7383 newsize = trampoff;
7384 if (htab->params->ppc476_workaround
7385 && (!bfd_link_relocatable (link_info)
7386 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7387 {
7388 bfd_vma addr, end_addr;
7389 unsigned int crossings;
7390 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7391
7392 addr = isec->output_section->vma + isec->output_offset;
7393 end_addr = addr + trampoff;
7394 addr &= -pagesize;
7395 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7396 if (crossings != 0)
7397 {
7398 /* Keep space aligned, to ensure the patch code itself does
7399 not cross a page. Don't decrease size calculated on a
7400 previous pass as otherwise we might never settle on a layout. */
7401 newsize = 15 - ((end_addr - 1) & 15);
7402 newsize += crossings * 16;
7403 if (relax_info->workaround_size < newsize)
7404 {
7405 relax_info->workaround_size = newsize;
7406 workaround_change = TRUE;
7407 }
7408 /* Ensure relocate_section is called. */
7409 isec->flags |= SEC_RELOC;
7410 }
7411 newsize = trampoff + relax_info->workaround_size;
7412 }
7413
7414 if (htab->params->pic_fixup > 0)
7415 {
7416 picfixup_size -= relax_info->picfixup_size;
7417 if (picfixup_size != 0)
7418 relax_info->picfixup_size += picfixup_size;
7419 newsize += relax_info->picfixup_size;
7420 }
7421
7422 if (changes != 0 || picfixup_size != 0 || workaround_change)
7423 isec->size = newsize;
7424
7425 if (isymbuf != NULL
7426 && symtab_hdr->contents != (unsigned char *) isymbuf)
7427 {
7428 if (! link_info->keep_memory)
7429 free (isymbuf);
7430 else
7431 {
7432 /* Cache the symbols for elf_link_input_bfd. */
7433 symtab_hdr->contents = (unsigned char *) isymbuf;
7434 }
7435 }
7436
7437 if (contents != NULL
7438 && elf_section_data (isec)->this_hdr.contents != contents)
7439 {
7440 if (!changes && !link_info->keep_memory)
7441 free (contents);
7442 else
7443 {
7444 /* Cache the section contents for elf_link_input_bfd. */
7445 elf_section_data (isec)->this_hdr.contents = contents;
7446 }
7447 }
7448
7449 changes += picfixup_size;
7450 if (changes != 0)
7451 {
7452 /* Append sufficient NOP relocs so we can write out relocation
7453 information for the trampolines. */
7454 Elf_Internal_Shdr *rel_hdr;
7455 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7456 * sizeof (*new_relocs));
7457 unsigned ix;
7458
7459 if (!new_relocs)
7460 goto error_return;
7461 memcpy (new_relocs, internal_relocs,
7462 isec->reloc_count * sizeof (*new_relocs));
7463 for (ix = changes; ix--;)
7464 {
7465 irel = new_relocs + ix + isec->reloc_count;
7466
7467 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7468 }
7469 if (internal_relocs != elf_section_data (isec)->relocs)
7470 free (internal_relocs);
7471 elf_section_data (isec)->relocs = new_relocs;
7472 isec->reloc_count += changes;
7473 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7474 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7475 }
7476 else if (internal_relocs != NULL
7477 && elf_section_data (isec)->relocs != internal_relocs)
7478 free (internal_relocs);
7479
7480 *again = changes != 0 || workaround_change;
7481 return TRUE;
7482
7483 error_return:
7484 while (branch_fixups != NULL)
7485 {
7486 struct one_branch_fixup *f = branch_fixups;
7487 branch_fixups = branch_fixups->next;
7488 free (f);
7489 }
7490 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7491 free (isymbuf);
7492 if (contents != NULL
7493 && elf_section_data (isec)->this_hdr.contents != contents)
7494 free (contents);
7495 if (internal_relocs != NULL
7496 && elf_section_data (isec)->relocs != internal_relocs)
7497 free (internal_relocs);
7498 return FALSE;
7499 }
7500 \f
7501 /* What to do when ld finds relocations against symbols defined in
7502 discarded sections. */
7503
7504 static unsigned int
7505 ppc_elf_action_discarded (asection *sec)
7506 {
7507 if (strcmp (".fixup", sec->name) == 0)
7508 return 0;
7509
7510 if (strcmp (".got2", sec->name) == 0)
7511 return 0;
7512
7513 return _bfd_elf_default_action_discarded (sec);
7514 }
7515 \f
7516 /* Fill in the address for a pointer generated in a linker section. */
7517
7518 static bfd_vma
7519 elf_finish_pointer_linker_section (bfd *input_bfd,
7520 elf_linker_section_t *lsect,
7521 struct elf_link_hash_entry *h,
7522 bfd_vma relocation,
7523 const Elf_Internal_Rela *rel)
7524 {
7525 elf_linker_section_pointers_t *linker_section_ptr;
7526
7527 BFD_ASSERT (lsect != NULL);
7528
7529 if (h != NULL)
7530 {
7531 /* Handle global symbol. */
7532 struct ppc_elf_link_hash_entry *eh;
7533
7534 eh = (struct ppc_elf_link_hash_entry *) h;
7535 BFD_ASSERT (eh->elf.def_regular);
7536 linker_section_ptr = eh->linker_section_pointer;
7537 }
7538 else
7539 {
7540 /* Handle local symbol. */
7541 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7542
7543 BFD_ASSERT (is_ppc_elf (input_bfd));
7544 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7545 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7546 }
7547
7548 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7549 rel->r_addend,
7550 lsect);
7551 BFD_ASSERT (linker_section_ptr != NULL);
7552
7553 /* Offset will always be a multiple of four, so use the bottom bit
7554 as a "written" flag. */
7555 if ((linker_section_ptr->offset & 1) == 0)
7556 {
7557 bfd_put_32 (lsect->section->owner,
7558 relocation + linker_section_ptr->addend,
7559 lsect->section->contents + linker_section_ptr->offset);
7560 linker_section_ptr->offset += 1;
7561 }
7562
7563 relocation = (lsect->section->output_section->vma
7564 + lsect->section->output_offset
7565 + linker_section_ptr->offset - 1
7566 - SYM_VAL (lsect->sym));
7567
7568 #ifdef DEBUG
7569 fprintf (stderr,
7570 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7571 lsect->name, (long) relocation, (long) relocation);
7572 #endif
7573
7574 return relocation;
7575 }
7576
7577 #define PPC_LO(v) ((v) & 0xffff)
7578 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7579 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7580
7581 static void
7582 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7583 struct bfd_link_info *info)
7584 {
7585 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7586 bfd *output_bfd = info->output_bfd;
7587 bfd_vma plt;
7588
7589 plt = ((ent->plt.offset & ~1)
7590 + plt_sec->output_section->vma
7591 + plt_sec->output_offset);
7592
7593 if (bfd_link_pic (info))
7594 {
7595 bfd_vma got = 0;
7596
7597 if (ent->addend >= 32768)
7598 got = (ent->addend
7599 + ent->sec->output_section->vma
7600 + ent->sec->output_offset);
7601 else if (htab->elf.hgot != NULL)
7602 got = SYM_VAL (htab->elf.hgot);
7603
7604 plt -= got;
7605
7606 if (plt + 0x8000 < 0x10000)
7607 {
7608 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7609 p += 4;
7610 bfd_put_32 (output_bfd, MTCTR_11, p);
7611 p += 4;
7612 bfd_put_32 (output_bfd, BCTR, p);
7613 p += 4;
7614 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7615 p += 4;
7616 }
7617 else
7618 {
7619 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7620 p += 4;
7621 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7622 p += 4;
7623 bfd_put_32 (output_bfd, MTCTR_11, p);
7624 p += 4;
7625 bfd_put_32 (output_bfd, BCTR, p);
7626 p += 4;
7627 }
7628 }
7629 else
7630 {
7631 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7632 p += 4;
7633 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7634 p += 4;
7635 bfd_put_32 (output_bfd, MTCTR_11, p);
7636 p += 4;
7637 bfd_put_32 (output_bfd, BCTR, p);
7638 p += 4;
7639 }
7640 }
7641
7642 /* Return true if symbol is defined statically. */
7643
7644 static bfd_boolean
7645 is_static_defined (struct elf_link_hash_entry *h)
7646 {
7647 return ((h->root.type == bfd_link_hash_defined
7648 || h->root.type == bfd_link_hash_defweak)
7649 && h->root.u.def.section != NULL
7650 && h->root.u.def.section->output_section != NULL);
7651 }
7652
7653 /* If INSN is an opcode that may be used with an @tls operand, return
7654 the transformed insn for TLS optimisation, otherwise return 0. If
7655 REG is non-zero only match an insn with RB or RA equal to REG. */
7656
7657 unsigned int
7658 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7659 {
7660 unsigned int rtra;
7661
7662 if ((insn & (0x3f << 26)) != 31 << 26)
7663 return 0;
7664
7665 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7666 rtra = insn & ((1 << 26) - (1 << 16));
7667 else if (((insn >> 16) & 0x1f) == reg)
7668 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7669 else
7670 return 0;
7671
7672 if ((insn & (0x3ff << 1)) == 266 << 1)
7673 /* add -> addi. */
7674 insn = 14 << 26;
7675 else if ((insn & (0x1f << 1)) == 23 << 1
7676 && ((insn & (0x1f << 6)) < 14 << 6
7677 || ((insn & (0x1f << 6)) >= 16 << 6
7678 && (insn & (0x1f << 6)) < 24 << 6)))
7679 /* load and store indexed -> dform. */
7680 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7681 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7682 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7683 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7684 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7685 /* lwax -> lwa. */
7686 insn = (58 << 26) | 2;
7687 else
7688 return 0;
7689 insn |= rtra;
7690 return insn;
7691 }
7692
7693 /* If INSN is an opcode that may be used with an @tprel operand, return
7694 the transformed insn for an undefined weak symbol, ie. with the
7695 thread pointer REG operand removed. Otherwise return 0. */
7696
7697 unsigned int
7698 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7699 {
7700 if ((insn & (0x1f << 16)) == reg << 16
7701 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7702 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7703 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7704 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7705 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7706 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7707 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7708 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7709 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7710 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7711 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7712 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7713 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7714 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7715 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7716 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7717 && (insn & 3) != 1)
7718 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7719 && ((insn & 3) == 0 || (insn & 3) == 3))))
7720 {
7721 insn &= ~(0x1f << 16);
7722 }
7723 else if ((insn & (0x1f << 21)) == reg << 21
7724 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7725 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7726 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7727 {
7728 insn &= ~(0x1f << 21);
7729 insn |= (insn & (0x1f << 16)) << 5;
7730 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7731 insn -= 2 >> 26; /* convert to ori,oris */
7732 }
7733 else
7734 insn = 0;
7735 return insn;
7736 }
7737
7738 static bfd_boolean
7739 is_insn_ds_form (unsigned int insn)
7740 {
7741 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7742 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7743 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7744 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7745 }
7746
7747 static bfd_boolean
7748 is_insn_dq_form (unsigned int insn)
7749 {
7750 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7751 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7752 && (insn & 3) == 1));
7753 }
7754
7755 /* The RELOCATE_SECTION function is called by the ELF backend linker
7756 to handle the relocations for a section.
7757
7758 The relocs are always passed as Rela structures; if the section
7759 actually uses Rel structures, the r_addend field will always be
7760 zero.
7761
7762 This function is responsible for adjust the section contents as
7763 necessary, and (if using Rela relocs and generating a
7764 relocatable output file) adjusting the reloc addend as
7765 necessary.
7766
7767 This function does not have to worry about setting the reloc
7768 address or the reloc symbol index.
7769
7770 LOCAL_SYMS is a pointer to the swapped in local symbols.
7771
7772 LOCAL_SECTIONS is an array giving the section in the input file
7773 corresponding to the st_shndx field of each local symbol.
7774
7775 The global hash table entry for the global symbols can be found
7776 via elf_sym_hashes (input_bfd).
7777
7778 When generating relocatable output, this function must handle
7779 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7780 going to be the section symbol corresponding to the output
7781 section, which means that the addend must be adjusted
7782 accordingly. */
7783
7784 static bfd_boolean
7785 ppc_elf_relocate_section (bfd *output_bfd,
7786 struct bfd_link_info *info,
7787 bfd *input_bfd,
7788 asection *input_section,
7789 bfd_byte *contents,
7790 Elf_Internal_Rela *relocs,
7791 Elf_Internal_Sym *local_syms,
7792 asection **local_sections)
7793 {
7794 Elf_Internal_Shdr *symtab_hdr;
7795 struct elf_link_hash_entry **sym_hashes;
7796 struct ppc_elf_link_hash_table *htab;
7797 Elf_Internal_Rela *rel;
7798 Elf_Internal_Rela *wrel;
7799 Elf_Internal_Rela *relend;
7800 Elf_Internal_Rela outrel;
7801 asection *got2;
7802 bfd_vma *local_got_offsets;
7803 bfd_boolean ret = TRUE;
7804 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7805 bfd_boolean is_vxworks_tls;
7806 unsigned int picfixup_size = 0;
7807 struct ppc_elf_relax_info *relax_info = NULL;
7808
7809 #ifdef DEBUG
7810 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7811 "%ld relocations%s",
7812 input_bfd, input_section,
7813 (long) input_section->reloc_count,
7814 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7815 #endif
7816
7817 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7818
7819 /* Initialize howto table if not already done. */
7820 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7821 ppc_elf_howto_init ();
7822
7823 htab = ppc_elf_hash_table (info);
7824 local_got_offsets = elf_local_got_offsets (input_bfd);
7825 symtab_hdr = &elf_symtab_hdr (input_bfd);
7826 sym_hashes = elf_sym_hashes (input_bfd);
7827 /* We have to handle relocations in vxworks .tls_vars sections
7828 specially, because the dynamic loader is 'weird'. */
7829 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7830 && !strcmp (input_section->output_section->name,
7831 ".tls_vars"));
7832 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7833 relax_info = elf_section_data (input_section)->sec_info;
7834 rel = wrel = relocs;
7835 relend = relocs + input_section->reloc_count;
7836 for (; rel < relend; wrel++, rel++)
7837 {
7838 enum elf_ppc_reloc_type r_type;
7839 bfd_vma addend;
7840 bfd_reloc_status_type r;
7841 Elf_Internal_Sym *sym;
7842 asection *sec;
7843 struct elf_link_hash_entry *h;
7844 const char *sym_name;
7845 reloc_howto_type *howto;
7846 unsigned long r_symndx;
7847 bfd_vma relocation;
7848 bfd_vma branch_bit, from;
7849 bfd_boolean unresolved_reloc;
7850 bfd_boolean warned;
7851 unsigned int tls_type, tls_mask, tls_gd;
7852 struct plt_entry **ifunc;
7853 struct reloc_howto_struct alt_howto;
7854
7855 again:
7856 r_type = ELF32_R_TYPE (rel->r_info);
7857 sym = NULL;
7858 sec = NULL;
7859 h = NULL;
7860 unresolved_reloc = FALSE;
7861 warned = FALSE;
7862 r_symndx = ELF32_R_SYM (rel->r_info);
7863
7864 if (r_symndx < symtab_hdr->sh_info)
7865 {
7866 sym = local_syms + r_symndx;
7867 sec = local_sections[r_symndx];
7868 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7869
7870 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7871 }
7872 else
7873 {
7874 bfd_boolean ignored;
7875
7876 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7877 r_symndx, symtab_hdr, sym_hashes,
7878 h, sec, relocation,
7879 unresolved_reloc, warned, ignored);
7880
7881 sym_name = h->root.root.string;
7882 }
7883
7884 if (sec != NULL && discarded_section (sec))
7885 {
7886 /* For relocs against symbols from removed linkonce sections,
7887 or sections discarded by a linker script, we just want the
7888 section contents zeroed. Avoid any special processing. */
7889 howto = NULL;
7890 if (r_type < R_PPC_max)
7891 howto = ppc_elf_howto_table[r_type];
7892
7893 _bfd_clear_contents (howto, input_bfd, input_section,
7894 contents + rel->r_offset);
7895 wrel->r_offset = rel->r_offset;
7896 wrel->r_info = 0;
7897 wrel->r_addend = 0;
7898
7899 /* For ld -r, remove relocations in debug sections against
7900 sections defined in discarded sections. Not done for
7901 non-debug to preserve relocs in .eh_frame which the
7902 eh_frame editing code expects to be present. */
7903 if (bfd_link_relocatable (info)
7904 && (input_section->flags & SEC_DEBUGGING))
7905 wrel--;
7906
7907 continue;
7908 }
7909
7910 if (bfd_link_relocatable (info))
7911 {
7912 if (got2 != NULL
7913 && r_type == R_PPC_PLTREL24
7914 && rel->r_addend != 0)
7915 {
7916 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7917 addend specifies the GOT pointer offset within .got2. */
7918 rel->r_addend += got2->output_offset;
7919 }
7920 if (r_type != R_PPC_RELAX_PLT
7921 && r_type != R_PPC_RELAX_PLTREL24
7922 && r_type != R_PPC_RELAX)
7923 goto copy_reloc;
7924 }
7925
7926 /* TLS optimizations. Replace instruction sequences and relocs
7927 based on information we collected in tls_optimize. We edit
7928 RELOCS so that --emit-relocs will output something sensible
7929 for the final instruction stream. */
7930 tls_mask = 0;
7931 tls_gd = 0;
7932 if (h != NULL)
7933 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7934 else if (local_got_offsets != NULL)
7935 {
7936 struct plt_entry **local_plt;
7937 char *lgot_masks;
7938 local_plt
7939 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7940 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7941 tls_mask = lgot_masks[r_symndx];
7942 }
7943
7944 /* Ensure reloc mapping code below stays sane. */
7945 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7946 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7947 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7948 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7949 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7950 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7951 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7952 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7953 abort ();
7954 switch (r_type)
7955 {
7956 default:
7957 break;
7958
7959 case R_PPC_GOT_TPREL16:
7960 case R_PPC_GOT_TPREL16_LO:
7961 if ((tls_mask & TLS_TLS) != 0
7962 && (tls_mask & TLS_TPREL) == 0)
7963 {
7964 bfd_vma insn;
7965
7966 insn = bfd_get_32 (input_bfd,
7967 contents + rel->r_offset - d_offset);
7968 insn &= 31 << 21;
7969 insn |= 0x3c020000; /* addis 0,2,0 */
7970 bfd_put_32 (input_bfd, insn,
7971 contents + rel->r_offset - d_offset);
7972 r_type = R_PPC_TPREL16_HA;
7973 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7974 }
7975 break;
7976
7977 case R_PPC_TLS:
7978 if ((tls_mask & TLS_TLS) != 0
7979 && (tls_mask & TLS_TPREL) == 0)
7980 {
7981 bfd_vma insn;
7982
7983 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7984 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7985 if (insn == 0)
7986 abort ();
7987 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7988 r_type = R_PPC_TPREL16_LO;
7989 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7990
7991 /* Was PPC_TLS which sits on insn boundary, now
7992 PPC_TPREL16_LO which is at low-order half-word. */
7993 rel->r_offset += d_offset;
7994 }
7995 break;
7996
7997 case R_PPC_GOT_TLSGD16_HI:
7998 case R_PPC_GOT_TLSGD16_HA:
7999 tls_gd = TLS_TPRELGD;
8000 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8001 goto tls_gdld_hi;
8002 break;
8003
8004 case R_PPC_GOT_TLSLD16_HI:
8005 case R_PPC_GOT_TLSLD16_HA:
8006 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8007 {
8008 tls_gdld_hi:
8009 if ((tls_mask & tls_gd) != 0)
8010 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8011 + R_PPC_GOT_TPREL16);
8012 else
8013 {
8014 rel->r_offset -= d_offset;
8015 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8016 r_type = R_PPC_NONE;
8017 }
8018 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8019 }
8020 break;
8021
8022 case R_PPC_GOT_TLSGD16:
8023 case R_PPC_GOT_TLSGD16_LO:
8024 tls_gd = TLS_TPRELGD;
8025 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8026 goto tls_ldgd_opt;
8027 break;
8028
8029 case R_PPC_GOT_TLSLD16:
8030 case R_PPC_GOT_TLSLD16_LO:
8031 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8032 {
8033 unsigned int insn1, insn2;
8034 bfd_vma offset;
8035
8036 tls_ldgd_opt:
8037 offset = (bfd_vma) -1;
8038 /* If not using the newer R_PPC_TLSGD/LD to mark
8039 __tls_get_addr calls, we must trust that the call
8040 stays with its arg setup insns, ie. that the next
8041 reloc is the __tls_get_addr call associated with
8042 the current reloc. Edit both insns. */
8043 if (input_section->has_tls_get_addr_call
8044 && rel + 1 < relend
8045 && branch_reloc_hash_match (input_bfd, rel + 1,
8046 htab->tls_get_addr))
8047 offset = rel[1].r_offset;
8048 /* We read the low GOT_TLS insn because we need to keep
8049 the destination reg. It may be something other than
8050 the usual r3, and moved to r3 before the call by
8051 intervening code. */
8052 insn1 = bfd_get_32 (input_bfd,
8053 contents + rel->r_offset - d_offset);
8054 if ((tls_mask & tls_gd) != 0)
8055 {
8056 /* IE */
8057 insn1 &= (0x1f << 21) | (0x1f << 16);
8058 insn1 |= 32 << 26; /* lwz */
8059 if (offset != (bfd_vma) -1)
8060 {
8061 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8062 insn2 = 0x7c631214; /* add 3,3,2 */
8063 bfd_put_32 (input_bfd, insn2, contents + offset);
8064 }
8065 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8066 + R_PPC_GOT_TPREL16);
8067 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8068 }
8069 else
8070 {
8071 /* LE */
8072 insn1 &= 0x1f << 21;
8073 insn1 |= 0x3c020000; /* addis r,2,0 */
8074 if (tls_gd == 0)
8075 {
8076 /* Was an LD reloc. */
8077 for (r_symndx = 0;
8078 r_symndx < symtab_hdr->sh_info;
8079 r_symndx++)
8080 if (local_sections[r_symndx] == sec)
8081 break;
8082 if (r_symndx >= symtab_hdr->sh_info)
8083 r_symndx = STN_UNDEF;
8084 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8085 if (r_symndx != STN_UNDEF)
8086 rel->r_addend -= (local_syms[r_symndx].st_value
8087 + sec->output_offset
8088 + sec->output_section->vma);
8089 }
8090 r_type = R_PPC_TPREL16_HA;
8091 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8092 if (offset != (bfd_vma) -1)
8093 {
8094 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8095 rel[1].r_offset = offset + d_offset;
8096 rel[1].r_addend = rel->r_addend;
8097 insn2 = 0x38630000; /* addi 3,3,0 */
8098 bfd_put_32 (input_bfd, insn2, contents + offset);
8099 }
8100 }
8101 bfd_put_32 (input_bfd, insn1,
8102 contents + rel->r_offset - d_offset);
8103 if (tls_gd == 0)
8104 {
8105 /* We changed the symbol on an LD reloc. Start over
8106 in order to get h, sym, sec etc. right. */
8107 goto again;
8108 }
8109 }
8110 break;
8111
8112 case R_PPC_TLSGD:
8113 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8114 {
8115 unsigned int insn2;
8116 bfd_vma offset = rel->r_offset;
8117
8118 if ((tls_mask & TLS_TPRELGD) != 0)
8119 {
8120 /* IE */
8121 r_type = R_PPC_NONE;
8122 insn2 = 0x7c631214; /* add 3,3,2 */
8123 }
8124 else
8125 {
8126 /* LE */
8127 r_type = R_PPC_TPREL16_LO;
8128 rel->r_offset += d_offset;
8129 insn2 = 0x38630000; /* addi 3,3,0 */
8130 }
8131 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8132 bfd_put_32 (input_bfd, insn2, contents + offset);
8133 /* Zap the reloc on the _tls_get_addr call too. */
8134 BFD_ASSERT (offset == rel[1].r_offset);
8135 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8136 }
8137 break;
8138
8139 case R_PPC_TLSLD:
8140 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8141 {
8142 unsigned int insn2;
8143
8144 for (r_symndx = 0;
8145 r_symndx < symtab_hdr->sh_info;
8146 r_symndx++)
8147 if (local_sections[r_symndx] == sec)
8148 break;
8149 if (r_symndx >= symtab_hdr->sh_info)
8150 r_symndx = STN_UNDEF;
8151 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8152 if (r_symndx != STN_UNDEF)
8153 rel->r_addend -= (local_syms[r_symndx].st_value
8154 + sec->output_offset
8155 + sec->output_section->vma);
8156
8157 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8158 rel->r_offset += d_offset;
8159 insn2 = 0x38630000; /* addi 3,3,0 */
8160 bfd_put_32 (input_bfd, insn2,
8161 contents + rel->r_offset - d_offset);
8162 /* Zap the reloc on the _tls_get_addr call too. */
8163 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8164 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8165 goto again;
8166 }
8167 break;
8168 }
8169
8170 /* Handle other relocations that tweak non-addend part of insn. */
8171 branch_bit = 0;
8172 switch (r_type)
8173 {
8174 default:
8175 break;
8176
8177 /* Branch taken prediction relocations. */
8178 case R_PPC_ADDR14_BRTAKEN:
8179 case R_PPC_REL14_BRTAKEN:
8180 branch_bit = BRANCH_PREDICT_BIT;
8181 /* Fall through. */
8182
8183 /* Branch not taken prediction relocations. */
8184 case R_PPC_ADDR14_BRNTAKEN:
8185 case R_PPC_REL14_BRNTAKEN:
8186 {
8187 bfd_vma insn;
8188
8189 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8190 insn &= ~BRANCH_PREDICT_BIT;
8191 insn |= branch_bit;
8192
8193 from = (rel->r_offset
8194 + input_section->output_offset
8195 + input_section->output_section->vma);
8196
8197 /* Invert 'y' bit if not the default. */
8198 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8199 insn ^= BRANCH_PREDICT_BIT;
8200
8201 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8202 break;
8203 }
8204 }
8205
8206 if (ELIMINATE_COPY_RELOCS
8207 && h != NULL
8208 && !h->def_regular
8209 && h->protected_def
8210 && ppc_elf_hash_entry (h)->has_addr16_ha
8211 && ppc_elf_hash_entry (h)->has_addr16_lo
8212 && htab->params->pic_fixup > 0)
8213 {
8214 /* Convert lis;addi or lis;load/store accessing a protected
8215 variable defined in a shared library to PIC. */
8216 unsigned int insn;
8217
8218 if (r_type == R_PPC_ADDR16_HA)
8219 {
8220 insn = bfd_get_32 (input_bfd,
8221 contents + rel->r_offset - d_offset);
8222 if ((insn & (0x3f << 26)) == (15u << 26)
8223 && (insn & (0x1f << 16)) == 0 /* lis */)
8224 {
8225 bfd_byte *p;
8226 bfd_vma off;
8227 bfd_vma got_addr;
8228
8229 p = (contents + input_section->size
8230 - relax_info->workaround_size
8231 - relax_info->picfixup_size
8232 + picfixup_size);
8233 off = (p - contents) - (rel->r_offset - d_offset);
8234 if (off > 0x1fffffc || (off & 3) != 0)
8235 info->callbacks->einfo
8236 (_("%P: %H: fixup branch overflow\n"),
8237 input_bfd, input_section, rel->r_offset);
8238
8239 bfd_put_32 (input_bfd, B | off,
8240 contents + rel->r_offset - d_offset);
8241 got_addr = (htab->got->output_section->vma
8242 + htab->got->output_offset
8243 + (h->got.offset & ~1));
8244 wrel->r_offset = (p - contents) + d_offset;
8245 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8246 wrel->r_addend = got_addr;
8247 insn &= ~0xffff;
8248 insn |= ((unsigned int )(got_addr + 0x8000) >> 16) & 0xffff;
8249 bfd_put_32 (input_bfd, insn, p);
8250
8251 /* Convert lis to lwz, loading address from GOT. */
8252 insn &= ~0xffff;
8253 insn ^= (32u ^ 15u) << 26;
8254 insn |= (insn & (0x1f << 21)) >> 5;
8255 insn |= got_addr & 0xffff;
8256 bfd_put_32 (input_bfd, insn, p + 4);
8257
8258 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8259 picfixup_size += 12;
8260
8261 /* Use one of the spare relocs, so --emit-relocs
8262 output is reasonable. */
8263 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8264 wrel++, rel++;
8265 rel->r_offset = wrel[-1].r_offset + 4;
8266 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8267 rel->r_addend = wrel[-1].r_addend;
8268
8269 /* Continue on as if we had a got reloc, to output
8270 dynamic reloc. */
8271 r_type = R_PPC_GOT16_LO;
8272 }
8273 else
8274 info->callbacks->einfo
8275 /* xgettext:c-format */
8276 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8277 input_bfd, input_section, rel->r_offset,
8278 "R_PPC_ADDR16_HA", insn);
8279 }
8280 else if (r_type == R_PPC_ADDR16_LO)
8281 {
8282 insn = bfd_get_32 (input_bfd,
8283 contents + rel->r_offset - d_offset);
8284 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8285 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8286 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8287 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8288 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8289 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8290 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8291 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8292 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8293 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8294 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8295 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8296 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8297 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8298 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8299 && (insn & 3) != 1)
8300 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8301 && ((insn & 3) == 0 || (insn & 3) == 3)))
8302 {
8303 /* Arrange to apply the reloc addend, if any. */
8304 relocation = 0;
8305 unresolved_reloc = FALSE;
8306 rel->r_info = ELF32_R_INFO (0, r_type);
8307 }
8308 else
8309 info->callbacks->einfo
8310 /* xgettext:c-format */
8311 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8312 input_bfd, input_section, rel->r_offset,
8313 "R_PPC_ADDR16_LO", insn);
8314 }
8315 }
8316
8317 ifunc = NULL;
8318 if (!htab->is_vxworks)
8319 {
8320 struct plt_entry *ent;
8321
8322 if (h != NULL)
8323 {
8324 if (h->type == STT_GNU_IFUNC)
8325 ifunc = &h->plt.plist;
8326 }
8327 else if (local_got_offsets != NULL
8328 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8329 {
8330 struct plt_entry **local_plt;
8331
8332 local_plt = (struct plt_entry **) (local_got_offsets
8333 + symtab_hdr->sh_info);
8334 ifunc = local_plt + r_symndx;
8335 }
8336
8337 ent = NULL;
8338 if (ifunc != NULL
8339 && (!bfd_link_pic (info)
8340 || is_branch_reloc (r_type)))
8341 {
8342 addend = 0;
8343 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8344 addend = rel->r_addend;
8345 ent = find_plt_ent (ifunc, got2, addend);
8346 }
8347 if (ent != NULL)
8348 {
8349 if (bfd_link_pic (info)
8350 && ent->sec != got2
8351 && htab->plt_type != PLT_NEW
8352 && (!htab->elf.dynamic_sections_created
8353 || h == NULL
8354 || h->dynindx == -1))
8355 {
8356 /* Uh oh, we are going to create a pic glink stub
8357 for an ifunc (here for h == NULL and later in
8358 finish_dynamic_symbol for h != NULL), and
8359 apparently are using code compiled with
8360 -mbss-plt. The difficulty is that -mbss-plt code
8361 gives no indication via a magic PLTREL24 addend
8362 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8363 is pointing into a .got2 section (and how far
8364 into .got2). */
8365 info->callbacks->einfo
8366 /* xgettext:c-format */
8367 (_("%X%P: %H: unsupported bss-plt -fPIC ifunc %s\n"),
8368 input_bfd, input_section, rel->r_offset, sym_name);
8369 }
8370 if (h == NULL && (ent->plt.offset & 1) == 0)
8371 {
8372 Elf_Internal_Rela rela;
8373 bfd_byte *loc;
8374
8375 rela.r_offset = (htab->iplt->output_section->vma
8376 + htab->iplt->output_offset
8377 + ent->plt.offset);
8378 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8379 rela.r_addend = relocation;
8380 loc = htab->reliplt->contents;
8381 loc += (htab->reliplt->reloc_count++
8382 * sizeof (Elf32_External_Rela));
8383 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8384
8385 ent->plt.offset |= 1;
8386 }
8387 if (h == NULL && (ent->glink_offset & 1) == 0)
8388 {
8389 unsigned char *p = ((unsigned char *) htab->glink->contents
8390 + ent->glink_offset);
8391 write_glink_stub (ent, htab->iplt, p, info);
8392 ent->glink_offset |= 1;
8393 }
8394
8395 unresolved_reloc = FALSE;
8396 if (htab->plt_type == PLT_NEW
8397 || !htab->elf.dynamic_sections_created
8398 || h == NULL
8399 || h->dynindx == -1)
8400 relocation = (htab->glink->output_section->vma
8401 + htab->glink->output_offset
8402 + (ent->glink_offset & ~1));
8403 else
8404 relocation = (htab->plt->output_section->vma
8405 + htab->plt->output_offset
8406 + ent->plt.offset);
8407 }
8408 }
8409
8410 addend = rel->r_addend;
8411 tls_type = 0;
8412 howto = NULL;
8413 if (r_type < R_PPC_max)
8414 howto = ppc_elf_howto_table[r_type];
8415 switch (r_type)
8416 {
8417 default:
8418 info->callbacks->einfo
8419 /* xgettext:c-format */
8420 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8421 input_bfd, (int) r_type, sym_name);
8422
8423 bfd_set_error (bfd_error_bad_value);
8424 ret = FALSE;
8425 goto copy_reloc;
8426
8427 case R_PPC_NONE:
8428 case R_PPC_TLS:
8429 case R_PPC_TLSGD:
8430 case R_PPC_TLSLD:
8431 case R_PPC_EMB_MRKREF:
8432 case R_PPC_GNU_VTINHERIT:
8433 case R_PPC_GNU_VTENTRY:
8434 goto copy_reloc;
8435
8436 /* GOT16 relocations. Like an ADDR16 using the symbol's
8437 address in the GOT as relocation value instead of the
8438 symbol's value itself. Also, create a GOT entry for the
8439 symbol and put the symbol value there. */
8440 case R_PPC_GOT_TLSGD16:
8441 case R_PPC_GOT_TLSGD16_LO:
8442 case R_PPC_GOT_TLSGD16_HI:
8443 case R_PPC_GOT_TLSGD16_HA:
8444 tls_type = TLS_TLS | TLS_GD;
8445 goto dogot;
8446
8447 case R_PPC_GOT_TLSLD16:
8448 case R_PPC_GOT_TLSLD16_LO:
8449 case R_PPC_GOT_TLSLD16_HI:
8450 case R_PPC_GOT_TLSLD16_HA:
8451 tls_type = TLS_TLS | TLS_LD;
8452 goto dogot;
8453
8454 case R_PPC_GOT_TPREL16:
8455 case R_PPC_GOT_TPREL16_LO:
8456 case R_PPC_GOT_TPREL16_HI:
8457 case R_PPC_GOT_TPREL16_HA:
8458 tls_type = TLS_TLS | TLS_TPREL;
8459 goto dogot;
8460
8461 case R_PPC_GOT_DTPREL16:
8462 case R_PPC_GOT_DTPREL16_LO:
8463 case R_PPC_GOT_DTPREL16_HI:
8464 case R_PPC_GOT_DTPREL16_HA:
8465 tls_type = TLS_TLS | TLS_DTPREL;
8466 goto dogot;
8467
8468 case R_PPC_GOT16:
8469 case R_PPC_GOT16_LO:
8470 case R_PPC_GOT16_HI:
8471 case R_PPC_GOT16_HA:
8472 tls_mask = 0;
8473 dogot:
8474 {
8475 /* Relocation is to the entry for this symbol in the global
8476 offset table. */
8477 bfd_vma off;
8478 bfd_vma *offp;
8479 unsigned long indx;
8480
8481 if (htab->got == NULL)
8482 abort ();
8483
8484 indx = 0;
8485 if (tls_type == (TLS_TLS | TLS_LD)
8486 && (h == NULL
8487 || !h->def_dynamic))
8488 offp = &htab->tlsld_got.offset;
8489 else if (h != NULL)
8490 {
8491 bfd_boolean dyn;
8492 dyn = htab->elf.dynamic_sections_created;
8493 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
8494 || (bfd_link_pic (info)
8495 && SYMBOL_REFERENCES_LOCAL (info, h)))
8496 /* This is actually a static link, or it is a
8497 -Bsymbolic link and the symbol is defined
8498 locally, or the symbol was forced to be local
8499 because of a version file. */
8500 ;
8501 else
8502 {
8503 BFD_ASSERT (h->dynindx != -1);
8504 indx = h->dynindx;
8505 unresolved_reloc = FALSE;
8506 }
8507 offp = &h->got.offset;
8508 }
8509 else
8510 {
8511 if (local_got_offsets == NULL)
8512 abort ();
8513 offp = &local_got_offsets[r_symndx];
8514 }
8515
8516 /* The offset must always be a multiple of 4. We use the
8517 least significant bit to record whether we have already
8518 processed this entry. */
8519 off = *offp;
8520 if ((off & 1) != 0)
8521 off &= ~1;
8522 else
8523 {
8524 unsigned int tls_m = (tls_mask
8525 & (TLS_LD | TLS_GD | TLS_DTPREL
8526 | TLS_TPREL | TLS_TPRELGD));
8527
8528 if (offp == &htab->tlsld_got.offset)
8529 tls_m = TLS_LD;
8530 else if (h == NULL
8531 || !h->def_dynamic)
8532 tls_m &= ~TLS_LD;
8533
8534 /* We might have multiple got entries for this sym.
8535 Initialize them all. */
8536 do
8537 {
8538 int tls_ty = 0;
8539
8540 if ((tls_m & TLS_LD) != 0)
8541 {
8542 tls_ty = TLS_TLS | TLS_LD;
8543 tls_m &= ~TLS_LD;
8544 }
8545 else if ((tls_m & TLS_GD) != 0)
8546 {
8547 tls_ty = TLS_TLS | TLS_GD;
8548 tls_m &= ~TLS_GD;
8549 }
8550 else if ((tls_m & TLS_DTPREL) != 0)
8551 {
8552 tls_ty = TLS_TLS | TLS_DTPREL;
8553 tls_m &= ~TLS_DTPREL;
8554 }
8555 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8556 {
8557 tls_ty = TLS_TLS | TLS_TPREL;
8558 tls_m = 0;
8559 }
8560
8561 /* Generate relocs for the dynamic linker. */
8562 if ((bfd_link_pic (info) || indx != 0)
8563 && (offp == &htab->tlsld_got.offset
8564 || h == NULL
8565 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8566 || h->root.type != bfd_link_hash_undefweak))
8567 {
8568 asection *rsec = htab->relgot;
8569 bfd_byte * loc;
8570
8571 if (ifunc != NULL)
8572 rsec = htab->reliplt;
8573 outrel.r_offset = (htab->got->output_section->vma
8574 + htab->got->output_offset
8575 + off);
8576 outrel.r_addend = 0;
8577 if (tls_ty & (TLS_LD | TLS_GD))
8578 {
8579 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8580 if (tls_ty == (TLS_TLS | TLS_GD))
8581 {
8582 loc = rsec->contents;
8583 loc += (rsec->reloc_count++
8584 * sizeof (Elf32_External_Rela));
8585 bfd_elf32_swap_reloca_out (output_bfd,
8586 &outrel, loc);
8587 outrel.r_offset += 4;
8588 outrel.r_info
8589 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8590 }
8591 }
8592 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8593 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8594 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8595 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8596 else if (indx != 0)
8597 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8598 else if (ifunc != NULL)
8599 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8600 else
8601 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8602 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8603 {
8604 outrel.r_addend += relocation;
8605 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8606 {
8607 if (htab->elf.tls_sec == NULL)
8608 outrel.r_addend = 0;
8609 else
8610 outrel.r_addend -= htab->elf.tls_sec->vma;
8611 }
8612 }
8613 loc = rsec->contents;
8614 loc += (rsec->reloc_count++
8615 * sizeof (Elf32_External_Rela));
8616 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8617 }
8618
8619 /* Init the .got section contents if we're not
8620 emitting a reloc. */
8621 else
8622 {
8623 bfd_vma value = relocation;
8624
8625 if (tls_ty == (TLS_TLS | TLS_LD))
8626 value = 1;
8627 else if (tls_ty != 0)
8628 {
8629 if (htab->elf.tls_sec == NULL)
8630 value = 0;
8631 else
8632 {
8633 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8634 if (tls_ty == (TLS_TLS | TLS_TPREL))
8635 value += DTP_OFFSET - TP_OFFSET;
8636 }
8637
8638 if (tls_ty == (TLS_TLS | TLS_GD))
8639 {
8640 bfd_put_32 (input_bfd, value,
8641 htab->got->contents + off + 4);
8642 value = 1;
8643 }
8644 }
8645 bfd_put_32 (input_bfd, value,
8646 htab->got->contents + off);
8647 }
8648
8649 off += 4;
8650 if (tls_ty & (TLS_LD | TLS_GD))
8651 off += 4;
8652 }
8653 while (tls_m != 0);
8654
8655 off = *offp;
8656 *offp = off | 1;
8657 }
8658
8659 if (off >= (bfd_vma) -2)
8660 abort ();
8661
8662 if ((tls_type & TLS_TLS) != 0)
8663 {
8664 if (tls_type != (TLS_TLS | TLS_LD))
8665 {
8666 if ((tls_mask & TLS_LD) != 0
8667 && !(h == NULL
8668 || !h->def_dynamic))
8669 off += 8;
8670 if (tls_type != (TLS_TLS | TLS_GD))
8671 {
8672 if ((tls_mask & TLS_GD) != 0)
8673 off += 8;
8674 if (tls_type != (TLS_TLS | TLS_DTPREL))
8675 {
8676 if ((tls_mask & TLS_DTPREL) != 0)
8677 off += 4;
8678 }
8679 }
8680 }
8681 }
8682
8683 /* If here for a picfixup, we're done. */
8684 if (r_type != ELF32_R_TYPE (rel->r_info))
8685 goto copy_reloc;
8686
8687 relocation = (htab->got->output_section->vma
8688 + htab->got->output_offset
8689 + off
8690 - SYM_VAL (htab->elf.hgot));
8691
8692 /* Addends on got relocations don't make much sense.
8693 x+off@got is actually x@got+off, and since the got is
8694 generated by a hash table traversal, the value in the
8695 got at entry m+n bears little relation to the entry m. */
8696 if (addend != 0)
8697 info->callbacks->einfo
8698 /* xgettext:c-format */
8699 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8700 input_bfd, input_section, rel->r_offset,
8701 howto->name,
8702 sym_name);
8703 }
8704 break;
8705
8706 /* Relocations that need no special processing. */
8707 case R_PPC_LOCAL24PC:
8708 /* It makes no sense to point a local relocation
8709 at a symbol not in this object. */
8710 if (unresolved_reloc)
8711 {
8712 (*info->callbacks->undefined_symbol) (info,
8713 h->root.root.string,
8714 input_bfd,
8715 input_section,
8716 rel->r_offset,
8717 TRUE);
8718 goto copy_reloc;
8719 }
8720 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8721 {
8722 /* @local on an ifunc does not really make sense since
8723 the ifunc resolver can take you anywhere. More
8724 seriously, calls to ifuncs must go through a plt call
8725 stub, and for pic the plt call stubs uses r30 to
8726 access the PLT. The problem is that a call that is
8727 local won't have the +32k reloc addend trick marking
8728 -fPIC code, so the linker won't know whether r30 is
8729 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8730 /* xgettext:c-format */
8731 info->callbacks->einfo (_("%X%P: %H: @local call to ifunc %s\n"),
8732 input_bfd, input_section, rel->r_offset,
8733 h->root.root.string);
8734 }
8735 break;
8736
8737 case R_PPC_DTPREL16:
8738 case R_PPC_DTPREL16_LO:
8739 case R_PPC_DTPREL16_HI:
8740 case R_PPC_DTPREL16_HA:
8741 if (htab->elf.tls_sec != NULL)
8742 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8743 break;
8744
8745 /* Relocations that may need to be propagated if this is a shared
8746 object. */
8747 case R_PPC_TPREL16:
8748 case R_PPC_TPREL16_LO:
8749 case R_PPC_TPREL16_HI:
8750 case R_PPC_TPREL16_HA:
8751 if (h != NULL
8752 && h->root.type == bfd_link_hash_undefweak
8753 && h->dynindx == -1)
8754 {
8755 /* Make this relocation against an undefined weak symbol
8756 resolve to zero. This is really just a tweak, since
8757 code using weak externs ought to check that they are
8758 defined before using them. */
8759 bfd_byte *p = contents + rel->r_offset - d_offset;
8760 unsigned int insn = bfd_get_32 (input_bfd, p);
8761 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8762 if (insn != 0)
8763 bfd_put_32 (input_bfd, insn, p);
8764 break;
8765 }
8766 if (htab->elf.tls_sec != NULL)
8767 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8768 /* The TPREL16 relocs shouldn't really be used in shared
8769 libs as they will result in DT_TEXTREL being set, but
8770 support them anyway. */
8771 goto dodyn;
8772
8773 case R_PPC_TPREL32:
8774 if (htab->elf.tls_sec != NULL)
8775 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8776 goto dodyn;
8777
8778 case R_PPC_DTPREL32:
8779 if (htab->elf.tls_sec != NULL)
8780 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8781 goto dodyn;
8782
8783 case R_PPC_DTPMOD32:
8784 relocation = 1;
8785 addend = 0;
8786 goto dodyn;
8787
8788 case R_PPC_REL16:
8789 case R_PPC_REL16_LO:
8790 case R_PPC_REL16_HI:
8791 case R_PPC_REL16_HA:
8792 case R_PPC_REL16DX_HA:
8793 break;
8794
8795 case R_PPC_REL32:
8796 if (h == NULL || h == htab->elf.hgot)
8797 break;
8798 /* fall through */
8799
8800 case R_PPC_ADDR32:
8801 case R_PPC_ADDR16:
8802 case R_PPC_ADDR16_LO:
8803 case R_PPC_ADDR16_HI:
8804 case R_PPC_ADDR16_HA:
8805 case R_PPC_UADDR32:
8806 case R_PPC_UADDR16:
8807 goto dodyn;
8808
8809 case R_PPC_VLE_REL8:
8810 case R_PPC_VLE_REL15:
8811 case R_PPC_VLE_REL24:
8812 case R_PPC_REL24:
8813 case R_PPC_REL14:
8814 case R_PPC_REL14_BRTAKEN:
8815 case R_PPC_REL14_BRNTAKEN:
8816 /* If these relocations are not to a named symbol, they can be
8817 handled right here, no need to bother the dynamic linker. */
8818 if (SYMBOL_CALLS_LOCAL (info, h)
8819 || h == htab->elf.hgot)
8820 break;
8821 /* fall through */
8822
8823 case R_PPC_ADDR24:
8824 case R_PPC_ADDR14:
8825 case R_PPC_ADDR14_BRTAKEN:
8826 case R_PPC_ADDR14_BRNTAKEN:
8827 if (h != NULL && !bfd_link_pic (info))
8828 break;
8829 /* fall through */
8830
8831 dodyn:
8832 if ((input_section->flags & SEC_ALLOC) == 0
8833 || is_vxworks_tls)
8834 break;
8835
8836 if ((bfd_link_pic (info)
8837 && !(h != NULL
8838 && ((h->root.type == bfd_link_hash_undefined
8839 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8840 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8841 || (h->root.type == bfd_link_hash_undefweak
8842 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8843 && (must_be_dyn_reloc (info, r_type)
8844 || !SYMBOL_CALLS_LOCAL (info, h)))
8845 || (ELIMINATE_COPY_RELOCS
8846 && !bfd_link_pic (info)
8847 && h != NULL
8848 && h->dynindx != -1
8849 && !h->non_got_ref
8850 && !h->def_regular
8851 && !(h->protected_def
8852 && ppc_elf_hash_entry (h)->has_addr16_ha
8853 && ppc_elf_hash_entry (h)->has_addr16_lo
8854 && htab->params->pic_fixup > 0)))
8855 {
8856 int skip;
8857 bfd_byte *loc;
8858 asection *sreloc;
8859 #ifdef DEBUG
8860 fprintf (stderr, "ppc_elf_relocate_section needs to "
8861 "create relocation for %s\n",
8862 (h && h->root.root.string
8863 ? h->root.root.string : "<unknown>"));
8864 #endif
8865
8866 /* When generating a shared object, these relocations
8867 are copied into the output file to be resolved at run
8868 time. */
8869 sreloc = elf_section_data (input_section)->sreloc;
8870 if (ifunc)
8871 sreloc = htab->reliplt;
8872 if (sreloc == NULL)
8873 return FALSE;
8874
8875 skip = 0;
8876 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8877 input_section,
8878 rel->r_offset);
8879 if (outrel.r_offset == (bfd_vma) -1
8880 || outrel.r_offset == (bfd_vma) -2)
8881 skip = (int) outrel.r_offset;
8882 outrel.r_offset += (input_section->output_section->vma
8883 + input_section->output_offset);
8884
8885 if (skip)
8886 memset (&outrel, 0, sizeof outrel);
8887 else if ((h != NULL
8888 && (h->root.type == bfd_link_hash_undefined
8889 || h->root.type == bfd_link_hash_undefweak))
8890 || !SYMBOL_REFERENCES_LOCAL (info, h))
8891 {
8892 BFD_ASSERT (h->dynindx != -1);
8893 unresolved_reloc = FALSE;
8894 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8895 outrel.r_addend = rel->r_addend;
8896 }
8897 else
8898 {
8899 outrel.r_addend = relocation + rel->r_addend;
8900
8901 if (r_type != R_PPC_ADDR32)
8902 {
8903 long indx = 0;
8904
8905 if (ifunc != NULL)
8906 {
8907 /* If we get here when building a static
8908 executable, then the libc startup function
8909 responsible for applying indirect function
8910 relocations is going to complain about
8911 the reloc type.
8912 If we get here when building a dynamic
8913 executable, it will be because we have
8914 a text relocation. The dynamic loader
8915 will set the text segment writable and
8916 non-executable to apply text relocations.
8917 So we'll segfault when trying to run the
8918 indirection function to resolve the reloc. */
8919 info->callbacks->einfo
8920 /* xgettext:c-format */
8921 (_("%P: %H: relocation %s for indirect "
8922 "function %s unsupported\n"),
8923 input_bfd, input_section, rel->r_offset,
8924 howto->name,
8925 sym_name);
8926 ret = FALSE;
8927 }
8928 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8929 ;
8930 else if (sec == NULL || sec->owner == NULL)
8931 {
8932 bfd_set_error (bfd_error_bad_value);
8933 ret = FALSE;
8934 }
8935 else
8936 {
8937 asection *osec;
8938
8939 /* We are turning this relocation into one
8940 against a section symbol. It would be
8941 proper to subtract the symbol's value,
8942 osec->vma, from the emitted reloc addend,
8943 but ld.so expects buggy relocs.
8944 FIXME: Why not always use a zero index? */
8945 osec = sec->output_section;
8946 indx = elf_section_data (osec)->dynindx;
8947 if (indx == 0)
8948 {
8949 osec = htab->elf.text_index_section;
8950 indx = elf_section_data (osec)->dynindx;
8951 }
8952 BFD_ASSERT (indx != 0);
8953 #ifdef DEBUG
8954 if (indx == 0)
8955 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8956 indx, osec->name, osec->flags,
8957 h->root.root.string);
8958 #endif
8959 }
8960
8961 outrel.r_info = ELF32_R_INFO (indx, r_type);
8962 }
8963 else if (ifunc != NULL)
8964 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8965 else
8966 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8967 }
8968
8969 loc = sreloc->contents;
8970 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8971 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8972
8973 if (skip == -1)
8974 goto copy_reloc;
8975
8976 /* This reloc will be computed at runtime. We clear the memory
8977 so that it contains predictable value. */
8978 if (! skip
8979 && ((input_section->flags & SEC_ALLOC) != 0
8980 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8981 {
8982 relocation = howto->pc_relative ? outrel.r_offset : 0;
8983 addend = 0;
8984 break;
8985 }
8986 }
8987 break;
8988
8989 case R_PPC_RELAX_PLT:
8990 case R_PPC_RELAX_PLTREL24:
8991 if (h != NULL)
8992 {
8993 struct plt_entry *ent;
8994 bfd_vma got2_addend = 0;
8995
8996 if (r_type == R_PPC_RELAX_PLTREL24)
8997 {
8998 if (bfd_link_pic (info))
8999 got2_addend = addend;
9000 addend = 0;
9001 }
9002 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9003 if (htab->plt_type == PLT_NEW)
9004 relocation = (htab->glink->output_section->vma
9005 + htab->glink->output_offset
9006 + ent->glink_offset);
9007 else
9008 relocation = (htab->plt->output_section->vma
9009 + htab->plt->output_offset
9010 + ent->plt.offset);
9011 }
9012 /* Fall through. */
9013
9014 case R_PPC_RELAX:
9015 {
9016 const int *stub;
9017 size_t size;
9018 size_t insn_offset = rel->r_offset;
9019 unsigned int insn;
9020
9021 if (bfd_link_pic (info))
9022 {
9023 relocation -= (input_section->output_section->vma
9024 + input_section->output_offset
9025 + rel->r_offset - 4);
9026 stub = shared_stub_entry;
9027 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9028 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9029 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9030 stub += 3;
9031 size = ARRAY_SIZE (shared_stub_entry) - 3;
9032 }
9033 else
9034 {
9035 stub = stub_entry;
9036 size = ARRAY_SIZE (stub_entry);
9037 }
9038
9039 relocation += addend;
9040 if (bfd_link_relocatable (info))
9041 relocation = 0;
9042
9043 /* First insn is HA, second is LO. */
9044 insn = *stub++;
9045 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9046 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9047 insn_offset += 4;
9048
9049 insn = *stub++;
9050 insn |= relocation & 0xffff;
9051 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9052 insn_offset += 4;
9053 size -= 2;
9054
9055 while (size != 0)
9056 {
9057 insn = *stub++;
9058 --size;
9059 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9060 insn_offset += 4;
9061 }
9062
9063 /* Rewrite the reloc and convert one of the trailing nop
9064 relocs to describe this relocation. */
9065 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9066 /* The relocs are at the bottom 2 bytes */
9067 wrel->r_offset = rel->r_offset + d_offset;
9068 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9069 wrel->r_addend = rel->r_addend;
9070 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9071 wrel++, rel++;
9072 wrel->r_offset += 4;
9073 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9074 }
9075 continue;
9076
9077 /* Indirect .sdata relocation. */
9078 case R_PPC_EMB_SDAI16:
9079 BFD_ASSERT (htab->sdata[0].section != NULL);
9080 if (!is_static_defined (htab->sdata[0].sym))
9081 {
9082 unresolved_reloc = TRUE;
9083 break;
9084 }
9085 relocation
9086 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9087 h, relocation, rel);
9088 addend = 0;
9089 break;
9090
9091 /* Indirect .sdata2 relocation. */
9092 case R_PPC_EMB_SDA2I16:
9093 BFD_ASSERT (htab->sdata[1].section != NULL);
9094 if (!is_static_defined (htab->sdata[1].sym))
9095 {
9096 unresolved_reloc = TRUE;
9097 break;
9098 }
9099 relocation
9100 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9101 h, relocation, rel);
9102 addend = 0;
9103 break;
9104
9105 /* Handle the TOC16 reloc. We want to use the offset within the .got
9106 section, not the actual VMA. This is appropriate when generating
9107 an embedded ELF object, for which the .got section acts like the
9108 AIX .toc section. */
9109 case R_PPC_TOC16: /* phony GOT16 relocations */
9110 if (sec == NULL || sec->output_section == NULL)
9111 {
9112 unresolved_reloc = TRUE;
9113 break;
9114 }
9115 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9116 ".got") == 0
9117 || strcmp (bfd_get_section_name (sec->owner, sec),
9118 ".cgot") == 0);
9119
9120 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9121 break;
9122
9123 case R_PPC_PLTREL24:
9124 if (h != NULL && ifunc == NULL)
9125 {
9126 struct plt_entry *ent;
9127
9128 ent = find_plt_ent (&h->plt.plist, got2,
9129 bfd_link_pic (info) ? addend : 0);
9130 if (ent == NULL
9131 || htab->plt == NULL)
9132 {
9133 /* We didn't make a PLT entry for this symbol. This
9134 happens when statically linking PIC code, or when
9135 using -Bsymbolic. */
9136 }
9137 else
9138 {
9139 /* Relocation is to the entry for this symbol in the
9140 procedure linkage table. */
9141 unresolved_reloc = FALSE;
9142 if (htab->plt_type == PLT_NEW)
9143 relocation = (htab->glink->output_section->vma
9144 + htab->glink->output_offset
9145 + ent->glink_offset);
9146 else
9147 relocation = (htab->plt->output_section->vma
9148 + htab->plt->output_offset
9149 + ent->plt.offset);
9150 }
9151 }
9152
9153 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9154 addend specifies the GOT pointer offset within .got2.
9155 Don't apply it to the relocation field. */
9156 addend = 0;
9157 break;
9158
9159 /* Relocate against _SDA_BASE_. */
9160 case R_PPC_SDAREL16:
9161 {
9162 const char *name;
9163 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9164
9165 if (sec == NULL
9166 || sec->output_section == NULL
9167 || !is_static_defined (sda))
9168 {
9169 unresolved_reloc = TRUE;
9170 break;
9171 }
9172 addend -= SYM_VAL (sda);
9173
9174 name = bfd_get_section_name (output_bfd, sec->output_section);
9175 if (!(strcmp (name, ".sdata") == 0
9176 || strcmp (name, ".sbss") == 0))
9177 {
9178 info->callbacks->einfo
9179 /* xgettext:c-format */
9180 (_("%P: %B: the target (%s) of a %s relocation is "
9181 "in the wrong output section (%s)\n"),
9182 input_bfd,
9183 sym_name,
9184 howto->name,
9185 name);
9186 }
9187 }
9188 break;
9189
9190 /* Relocate against _SDA2_BASE_. */
9191 case R_PPC_EMB_SDA2REL:
9192 {
9193 const char *name;
9194 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9195
9196 if (sec == NULL
9197 || sec->output_section == NULL
9198 || !is_static_defined (sda))
9199 {
9200 unresolved_reloc = TRUE;
9201 break;
9202 }
9203 addend -= SYM_VAL (sda);
9204
9205 name = bfd_get_section_name (output_bfd, sec->output_section);
9206 if (!(strcmp (name, ".sdata2") == 0
9207 || strcmp (name, ".sbss2") == 0))
9208 {
9209 info->callbacks->einfo
9210 /* xgettext:c-format */
9211 (_("%P: %B: the target (%s) of a %s relocation is "
9212 "in the wrong output section (%s)\n"),
9213 input_bfd,
9214 sym_name,
9215 howto->name,
9216 name);
9217 }
9218 }
9219 break;
9220
9221 case R_PPC_VLE_LO16A:
9222 relocation = relocation + addend;
9223 ppc_elf_vle_split16 (input_bfd, contents + rel->r_offset,
9224 relocation, split16a_type);
9225 goto copy_reloc;
9226
9227 case R_PPC_VLE_LO16D:
9228 relocation = relocation + addend;
9229 ppc_elf_vle_split16 (input_bfd, contents + rel->r_offset,
9230 relocation, split16d_type);
9231 goto copy_reloc;
9232
9233 case R_PPC_VLE_HI16A:
9234 relocation = (relocation + addend) >> 16;
9235 ppc_elf_vle_split16 (input_bfd, contents + rel->r_offset,
9236 relocation, split16a_type);
9237 goto copy_reloc;
9238
9239 case R_PPC_VLE_HI16D:
9240 relocation = (relocation + addend) >> 16;
9241 ppc_elf_vle_split16 (input_bfd, contents + rel->r_offset,
9242 relocation, split16d_type);
9243 goto copy_reloc;
9244
9245 case R_PPC_VLE_HA16A:
9246 relocation = (relocation + addend + 0x8000) >> 16;
9247 ppc_elf_vle_split16 (input_bfd, contents + rel->r_offset,
9248 relocation, split16a_type);
9249 goto copy_reloc;
9250
9251 case R_PPC_VLE_HA16D:
9252 relocation = (relocation + addend + 0x8000) >> 16;
9253 ppc_elf_vle_split16 (input_bfd, contents + rel->r_offset,
9254 relocation, split16d_type);
9255 goto copy_reloc;
9256
9257 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9258 case R_PPC_EMB_SDA21:
9259 case R_PPC_VLE_SDA21:
9260 case R_PPC_EMB_RELSDA:
9261 case R_PPC_VLE_SDA21_LO:
9262 {
9263 const char *name;
9264 int reg;
9265 unsigned int insn;
9266 struct elf_link_hash_entry *sda = NULL;
9267
9268 if (sec == NULL || sec->output_section == NULL)
9269 {
9270 unresolved_reloc = TRUE;
9271 break;
9272 }
9273
9274 name = bfd_get_section_name (output_bfd, sec->output_section);
9275 if (strcmp (name, ".sdata") == 0
9276 || strcmp (name, ".sbss") == 0)
9277 {
9278 reg = 13;
9279 sda = htab->sdata[0].sym;
9280 }
9281 else if (strcmp (name, ".sdata2") == 0
9282 || strcmp (name, ".sbss2") == 0)
9283 {
9284 reg = 2;
9285 sda = htab->sdata[1].sym;
9286 }
9287 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9288 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9289 {
9290 reg = 0;
9291 }
9292 else
9293 {
9294 info->callbacks->einfo
9295 /* xgettext:c-format */
9296 (_("%P: %B: the target (%s) of a %s relocation is "
9297 "in the wrong output section (%s)\n"),
9298 input_bfd,
9299 sym_name,
9300 howto->name,
9301 name);
9302
9303 bfd_set_error (bfd_error_bad_value);
9304 ret = FALSE;
9305 goto copy_reloc;
9306 }
9307
9308 if (sda != NULL)
9309 {
9310 if (!is_static_defined (sda))
9311 {
9312 unresolved_reloc = TRUE;
9313 break;
9314 }
9315 addend -= SYM_VAL (sda);
9316 }
9317
9318 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9319 if (reg == 0
9320 && (r_type == R_PPC_VLE_SDA21
9321 || r_type == R_PPC_VLE_SDA21_LO))
9322 {
9323 relocation = relocation + addend;
9324 addend = 0;
9325
9326 /* Force e_li insn, keeping RT from original insn. */
9327 insn &= 0x1f << 21;
9328 insn |= 28u << 26;
9329
9330 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9331 /* Top 4 bits of value to 17..20. */
9332 insn |= (relocation & 0xf0000) >> 5;
9333 /* Next 5 bits of the value to 11..15. */
9334 insn |= (relocation & 0xf800) << 5;
9335 /* And the final 11 bits of the value to bits 21 to 31. */
9336 insn |= relocation & 0x7ff;
9337
9338 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9339
9340 if (r_type == R_PPC_VLE_SDA21
9341 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9342 goto overflow;
9343 goto copy_reloc;
9344 }
9345 else if (r_type == R_PPC_EMB_SDA21
9346 || r_type == R_PPC_VLE_SDA21
9347 || r_type == R_PPC_VLE_SDA21_LO)
9348 {
9349 /* Fill in register field. */
9350 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9351 }
9352 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9353 }
9354 break;
9355
9356 case R_PPC_VLE_SDAREL_LO16A:
9357 case R_PPC_VLE_SDAREL_LO16D:
9358 case R_PPC_VLE_SDAREL_HI16A:
9359 case R_PPC_VLE_SDAREL_HI16D:
9360 case R_PPC_VLE_SDAREL_HA16A:
9361 case R_PPC_VLE_SDAREL_HA16D:
9362 {
9363 bfd_vma value;
9364 const char *name;
9365 //int reg;
9366 struct elf_link_hash_entry *sda = NULL;
9367
9368 if (sec == NULL || sec->output_section == NULL)
9369 {
9370 unresolved_reloc = TRUE;
9371 break;
9372 }
9373
9374 name = bfd_get_section_name (output_bfd, sec->output_section);
9375 if (strcmp (name, ".sdata") == 0
9376 || strcmp (name, ".sbss") == 0)
9377 {
9378 //reg = 13;
9379 sda = htab->sdata[0].sym;
9380 }
9381 else if (strcmp (name, ".sdata2") == 0
9382 || strcmp (name, ".sbss2") == 0)
9383 {
9384 //reg = 2;
9385 sda = htab->sdata[1].sym;
9386 }
9387 else
9388 {
9389 _bfd_error_handler
9390 /* xgettext:c-format */
9391 (_("%B: the target (%s) of a %s relocation is "
9392 "in the wrong output section (%s)"),
9393 input_bfd,
9394 sym_name,
9395 howto->name,
9396 name);
9397
9398 bfd_set_error (bfd_error_bad_value);
9399 ret = FALSE;
9400 goto copy_reloc;
9401 }
9402
9403 if (sda != NULL)
9404 {
9405 if (!is_static_defined (sda))
9406 {
9407 unresolved_reloc = TRUE;
9408 break;
9409 }
9410 }
9411
9412 value = (sda->root.u.def.section->output_section->vma
9413 + sda->root.u.def.section->output_offset
9414 + addend);
9415
9416 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9417 ppc_elf_vle_split16 (input_bfd, contents + rel->r_offset,
9418 value, split16a_type);
9419 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9420 ppc_elf_vle_split16 (input_bfd, contents + rel->r_offset,
9421 value, split16d_type);
9422 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9423 {
9424 value = value >> 16;
9425 ppc_elf_vle_split16 (input_bfd, contents + rel->r_offset,
9426 value, split16a_type);
9427 }
9428 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9429 {
9430 value = value >> 16;
9431 ppc_elf_vle_split16 (input_bfd, contents + rel->r_offset,
9432 value, split16d_type);
9433 }
9434 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9435 {
9436 value = (value + 0x8000) >> 16;
9437 ppc_elf_vle_split16 (input_bfd, contents + rel->r_offset,
9438 value, split16a_type);
9439 }
9440 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9441 {
9442 value = (value + 0x8000) >> 16;
9443 ppc_elf_vle_split16 (input_bfd, contents + rel->r_offset,
9444 value, split16d_type);
9445 }
9446 }
9447 goto copy_reloc;
9448
9449 /* Relocate against the beginning of the section. */
9450 case R_PPC_SECTOFF:
9451 case R_PPC_SECTOFF_LO:
9452 case R_PPC_SECTOFF_HI:
9453 case R_PPC_SECTOFF_HA:
9454 if (sec == NULL || sec->output_section == NULL)
9455 {
9456 unresolved_reloc = TRUE;
9457 break;
9458 }
9459 addend -= sec->output_section->vma;
9460 break;
9461
9462 /* Negative relocations. */
9463 case R_PPC_EMB_NADDR32:
9464 case R_PPC_EMB_NADDR16:
9465 case R_PPC_EMB_NADDR16_LO:
9466 case R_PPC_EMB_NADDR16_HI:
9467 case R_PPC_EMB_NADDR16_HA:
9468 addend -= 2 * relocation;
9469 break;
9470
9471 case R_PPC_COPY:
9472 case R_PPC_GLOB_DAT:
9473 case R_PPC_JMP_SLOT:
9474 case R_PPC_RELATIVE:
9475 case R_PPC_IRELATIVE:
9476 case R_PPC_PLT32:
9477 case R_PPC_PLTREL32:
9478 case R_PPC_PLT16_LO:
9479 case R_PPC_PLT16_HI:
9480 case R_PPC_PLT16_HA:
9481 case R_PPC_ADDR30:
9482 case R_PPC_EMB_RELSEC16:
9483 case R_PPC_EMB_RELST_LO:
9484 case R_PPC_EMB_RELST_HI:
9485 case R_PPC_EMB_RELST_HA:
9486 case R_PPC_EMB_BIT_FLD:
9487 info->callbacks->einfo
9488 /* xgettext:c-format */
9489 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9490 input_bfd,
9491 howto->name,
9492 sym_name);
9493
9494 bfd_set_error (bfd_error_invalid_operation);
9495 ret = FALSE;
9496 goto copy_reloc;
9497 }
9498
9499 /* Do any further special processing. */
9500 switch (r_type)
9501 {
9502 default:
9503 break;
9504
9505 case R_PPC_ADDR16_HA:
9506 case R_PPC_REL16_HA:
9507 case R_PPC_REL16DX_HA:
9508 case R_PPC_SECTOFF_HA:
9509 case R_PPC_TPREL16_HA:
9510 case R_PPC_DTPREL16_HA:
9511 case R_PPC_EMB_NADDR16_HA:
9512 case R_PPC_EMB_RELST_HA:
9513 /* It's just possible that this symbol is a weak symbol
9514 that's not actually defined anywhere. In that case,
9515 'sec' would be NULL, and we should leave the symbol
9516 alone (it will be set to zero elsewhere in the link). */
9517 if (sec == NULL)
9518 break;
9519 /* Fall through. */
9520
9521 case R_PPC_PLT16_HA:
9522 case R_PPC_GOT16_HA:
9523 case R_PPC_GOT_TLSGD16_HA:
9524 case R_PPC_GOT_TLSLD16_HA:
9525 case R_PPC_GOT_TPREL16_HA:
9526 case R_PPC_GOT_DTPREL16_HA:
9527 /* Add 0x10000 if sign bit in 0:15 is set.
9528 Bits 0:15 are not used. */
9529 addend += 0x8000;
9530 break;
9531
9532 case R_PPC_ADDR16:
9533 case R_PPC_ADDR16_LO:
9534 case R_PPC_GOT16:
9535 case R_PPC_GOT16_LO:
9536 case R_PPC_SDAREL16:
9537 case R_PPC_SECTOFF:
9538 case R_PPC_SECTOFF_LO:
9539 case R_PPC_DTPREL16:
9540 case R_PPC_DTPREL16_LO:
9541 case R_PPC_TPREL16:
9542 case R_PPC_TPREL16_LO:
9543 case R_PPC_GOT_TLSGD16:
9544 case R_PPC_GOT_TLSGD16_LO:
9545 case R_PPC_GOT_TLSLD16:
9546 case R_PPC_GOT_TLSLD16_LO:
9547 case R_PPC_GOT_DTPREL16:
9548 case R_PPC_GOT_DTPREL16_LO:
9549 case R_PPC_GOT_TPREL16:
9550 case R_PPC_GOT_TPREL16_LO:
9551 {
9552 /* The 32-bit ABI lacks proper relocations to deal with
9553 certain 64-bit instructions. Prevent damage to bits
9554 that make up part of the insn opcode. */
9555 unsigned int insn, mask, lobit;
9556
9557 insn = bfd_get_32 (input_bfd,
9558 contents + rel->r_offset - d_offset);
9559 mask = 0;
9560 if (is_insn_ds_form (insn))
9561 mask = 3;
9562 else if (is_insn_dq_form (insn))
9563 mask = 15;
9564 else
9565 break;
9566 relocation += addend;
9567 addend = insn & mask;
9568 lobit = mask & relocation;
9569 if (lobit != 0)
9570 {
9571 relocation ^= lobit;
9572 info->callbacks->einfo
9573 /* xgettext:c-format */
9574 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9575 input_bfd, input_section, rel->r_offset,
9576 howto->name, sym_name, mask + 1);
9577 bfd_set_error (bfd_error_bad_value);
9578 ret = FALSE;
9579 }
9580 }
9581 break;
9582 }
9583
9584 #ifdef DEBUG
9585 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9586 "offset = %ld, addend = %ld\n",
9587 howto->name,
9588 (int) r_type,
9589 sym_name,
9590 r_symndx,
9591 (long) rel->r_offset,
9592 (long) addend);
9593 #endif
9594
9595 if (unresolved_reloc
9596 && !((input_section->flags & SEC_DEBUGGING) != 0
9597 && h->def_dynamic)
9598 && _bfd_elf_section_offset (output_bfd, info, input_section,
9599 rel->r_offset) != (bfd_vma) -1)
9600 {
9601 info->callbacks->einfo
9602 /* xgettext:c-format */
9603 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9604 input_bfd, input_section, rel->r_offset,
9605 howto->name,
9606 sym_name);
9607 ret = FALSE;
9608 }
9609
9610 /* 16-bit fields in insns mostly have signed values, but a
9611 few insns have 16-bit unsigned values. Really, we should
9612 have different reloc types. */
9613 if (howto->complain_on_overflow != complain_overflow_dont
9614 && howto->dst_mask == 0xffff
9615 && (input_section->flags & SEC_CODE) != 0)
9616 {
9617 enum complain_overflow complain = complain_overflow_signed;
9618
9619 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9620 {
9621 unsigned int insn;
9622
9623 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9624 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9625 complain = complain_overflow_bitfield;
9626 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9627 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9628 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9629 complain = complain_overflow_unsigned;
9630 }
9631 if (howto->complain_on_overflow != complain)
9632 {
9633 alt_howto = *howto;
9634 alt_howto.complain_on_overflow = complain;
9635 howto = &alt_howto;
9636 }
9637 }
9638
9639 if (r_type == R_PPC_REL16DX_HA)
9640 {
9641 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9642 if (rel->r_offset + 4 > input_section->size)
9643 r = bfd_reloc_outofrange;
9644 else
9645 {
9646 unsigned int insn;
9647
9648 relocation += addend;
9649 relocation -= (rel->r_offset
9650 + input_section->output_offset
9651 + input_section->output_section->vma);
9652 relocation >>= 16;
9653 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9654 insn &= ~0x1fffc1;
9655 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9656 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9657 r = bfd_reloc_ok;
9658 }
9659 }
9660 else
9661 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9662 rel->r_offset, relocation, addend);
9663
9664 if (r != bfd_reloc_ok)
9665 {
9666 if (r == bfd_reloc_overflow)
9667 {
9668 overflow:
9669 /* On code like "if (foo) foo();" don't report overflow
9670 on a branch to zero when foo is undefined. */
9671 if (!warned
9672 && !(h != NULL
9673 && (h->root.type == bfd_link_hash_undefweak
9674 || h->root.type == bfd_link_hash_undefined)
9675 && is_branch_reloc (r_type)))
9676 info->callbacks->reloc_overflow
9677 (info, (h ? &h->root : NULL), sym_name, howto->name,
9678 rel->r_addend, input_bfd, input_section, rel->r_offset);
9679 }
9680 else
9681 {
9682 info->callbacks->einfo
9683 /* xgettext:c-format */
9684 (_("%P: %H: %s reloc against `%s': error %d\n"),
9685 input_bfd, input_section, rel->r_offset,
9686 howto->name, sym_name, (int) r);
9687 ret = FALSE;
9688 }
9689 }
9690 copy_reloc:
9691 if (wrel != rel)
9692 *wrel = *rel;
9693 }
9694
9695 if (wrel != rel)
9696 {
9697 Elf_Internal_Shdr *rel_hdr;
9698 size_t deleted = rel - wrel;
9699
9700 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9701 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9702 if (rel_hdr->sh_size == 0)
9703 {
9704 /* It is too late to remove an empty reloc section. Leave
9705 one NONE reloc.
9706 ??? What is wrong with an empty section??? */
9707 rel_hdr->sh_size = rel_hdr->sh_entsize;
9708 deleted -= 1;
9709 wrel++;
9710 }
9711 relend = wrel;
9712 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9713 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9714 input_section->reloc_count -= deleted;
9715 }
9716
9717 #ifdef DEBUG
9718 fprintf (stderr, "\n");
9719 #endif
9720
9721 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9722 && input_section->size != input_section->rawsize
9723 && (strcmp (input_section->output_section->name, ".init") == 0
9724 || strcmp (input_section->output_section->name, ".fini") == 0))
9725 {
9726 /* Branch around the trampolines. */
9727 unsigned int insn = B + input_section->size - input_section->rawsize;
9728 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9729 }
9730
9731 if (htab->params->ppc476_workaround
9732 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9733 && (!bfd_link_relocatable (info)
9734 || (input_section->output_section->alignment_power
9735 >= htab->params->pagesize_p2)))
9736 {
9737 bfd_vma start_addr, end_addr, addr;
9738 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9739
9740 if (relax_info->workaround_size != 0)
9741 {
9742 bfd_byte *p;
9743 unsigned int n;
9744 bfd_byte fill[4];
9745
9746 bfd_put_32 (input_bfd, BA, fill);
9747 p = contents + input_section->size - relax_info->workaround_size;
9748 n = relax_info->workaround_size >> 2;
9749 while (n--)
9750 {
9751 memcpy (p, fill, 4);
9752 p += 4;
9753 }
9754 }
9755
9756 /* The idea is: Replace the last instruction on a page with a
9757 branch to a patch area. Put the insn there followed by a
9758 branch back to the next page. Complicated a little by
9759 needing to handle moved conditional branches, and by not
9760 wanting to touch data-in-text. */
9761
9762 start_addr = (input_section->output_section->vma
9763 + input_section->output_offset);
9764 end_addr = (start_addr + input_section->size
9765 - relax_info->workaround_size);
9766 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9767 addr < end_addr;
9768 addr += pagesize)
9769 {
9770 bfd_vma offset = addr - start_addr;
9771 Elf_Internal_Rela *lo, *hi;
9772 bfd_boolean is_data;
9773 bfd_vma patch_off, patch_addr;
9774 unsigned int insn;
9775
9776 /* Do we have a data reloc at this offset? If so, leave
9777 the word alone. */
9778 is_data = FALSE;
9779 lo = relocs;
9780 hi = relend;
9781 rel = NULL;
9782 while (lo < hi)
9783 {
9784 rel = lo + (hi - lo) / 2;
9785 if (rel->r_offset < offset)
9786 lo = rel + 1;
9787 else if (rel->r_offset > offset + 3)
9788 hi = rel;
9789 else
9790 {
9791 switch (ELF32_R_TYPE (rel->r_info))
9792 {
9793 case R_PPC_ADDR32:
9794 case R_PPC_UADDR32:
9795 case R_PPC_REL32:
9796 case R_PPC_ADDR30:
9797 is_data = TRUE;
9798 break;
9799 default:
9800 break;
9801 }
9802 break;
9803 }
9804 }
9805 if (is_data)
9806 continue;
9807
9808 /* Some instructions can be left alone too. Unconditional
9809 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9810 avoid the icache failure.
9811
9812 The problem occurs due to prefetch across a page boundary
9813 where stale instructions can be fetched from the next
9814 page, and the mechanism for flushing these bad
9815 instructions fails under certain circumstances. The
9816 unconditional branches:
9817 1) Branch: b, bl, ba, bla,
9818 2) Branch Conditional: bc, bca, bcl, bcla,
9819 3) Branch Conditional to Link Register: bclr, bclrl,
9820 where (2) and (3) have BO=0x14 making them unconditional,
9821 prevent the bad prefetch because the prefetch itself is
9822 affected by these instructions. This happens even if the
9823 instruction is not executed.
9824
9825 A bctr example:
9826 .
9827 . lis 9,new_page@ha
9828 . addi 9,9,new_page@l
9829 . mtctr 9
9830 . bctr
9831 . nop
9832 . nop
9833 . new_page:
9834 .
9835 The bctr is not predicted taken due to ctr not being
9836 ready, so prefetch continues on past the bctr into the
9837 new page which might have stale instructions. If they
9838 fail to be flushed, then they will be executed after the
9839 bctr executes. Either of the following modifications
9840 prevent the bad prefetch from happening in the first
9841 place:
9842 .
9843 . lis 9,new_page@ha lis 9,new_page@ha
9844 . addi 9,9,new_page@l addi 9,9,new_page@l
9845 . mtctr 9 mtctr 9
9846 . bctr bctr
9847 . nop b somewhere_else
9848 . b somewhere_else nop
9849 . new_page: new_page:
9850 . */
9851 insn = bfd_get_32 (input_bfd, contents + offset);
9852 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9853 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9854 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9855 || ((insn & (0x3f << 26)) == (19u << 26)
9856 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9857 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9858 continue;
9859
9860 patch_addr = (start_addr + input_section->size
9861 - relax_info->workaround_size);
9862 patch_addr = (patch_addr + 15) & -16;
9863 patch_off = patch_addr - start_addr;
9864 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9865
9866 if (rel != NULL
9867 && rel->r_offset >= offset
9868 && rel->r_offset < offset + 4)
9869 {
9870 asection *sreloc;
9871
9872 /* If the insn we are patching had a reloc, adjust the
9873 reloc r_offset so that the reloc applies to the moved
9874 location. This matters for -r and --emit-relocs. */
9875 if (rel + 1 != relend)
9876 {
9877 Elf_Internal_Rela tmp = *rel;
9878
9879 /* Keep the relocs sorted by r_offset. */
9880 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9881 relend[-1] = tmp;
9882 }
9883 relend[-1].r_offset += patch_off - offset;
9884
9885 /* Adjust REL16 addends too. */
9886 switch (ELF32_R_TYPE (relend[-1].r_info))
9887 {
9888 case R_PPC_REL16:
9889 case R_PPC_REL16_LO:
9890 case R_PPC_REL16_HI:
9891 case R_PPC_REL16_HA:
9892 relend[-1].r_addend += patch_off - offset;
9893 break;
9894 default:
9895 break;
9896 }
9897
9898 /* If we are building a PIE or shared library with
9899 non-PIC objects, perhaps we had a dynamic reloc too?
9900 If so, the dynamic reloc must move with the insn. */
9901 sreloc = elf_section_data (input_section)->sreloc;
9902 if (sreloc != NULL)
9903 {
9904 Elf32_External_Rela *slo, *shi, *srelend;
9905 bfd_vma soffset;
9906
9907 slo = (Elf32_External_Rela *) sreloc->contents;
9908 shi = srelend = slo + sreloc->reloc_count;
9909 soffset = (offset + input_section->output_section->vma
9910 + input_section->output_offset);
9911 while (slo < shi)
9912 {
9913 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9914 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9915 &outrel);
9916 if (outrel.r_offset < soffset)
9917 slo = srel + 1;
9918 else if (outrel.r_offset > soffset + 3)
9919 shi = srel;
9920 else
9921 {
9922 if (srel + 1 != srelend)
9923 {
9924 memmove (srel, srel + 1,
9925 (srelend - (srel + 1)) * sizeof (*srel));
9926 srel = srelend - 1;
9927 }
9928 outrel.r_offset += patch_off - offset;
9929 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9930 (bfd_byte *) srel);
9931 break;
9932 }
9933 }
9934 }
9935 }
9936 else
9937 rel = NULL;
9938
9939 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9940 && (insn & 2) == 0 /* relative */)
9941 {
9942 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9943
9944 delta += offset - patch_off;
9945 if (bfd_link_relocatable (info) && rel != NULL)
9946 delta = 0;
9947 if (!bfd_link_relocatable (info) && rel != NULL)
9948 {
9949 enum elf_ppc_reloc_type r_type;
9950
9951 r_type = ELF32_R_TYPE (relend[-1].r_info);
9952 if (r_type == R_PPC_REL14_BRTAKEN)
9953 insn |= BRANCH_PREDICT_BIT;
9954 else if (r_type == R_PPC_REL14_BRNTAKEN)
9955 insn &= ~BRANCH_PREDICT_BIT;
9956 else
9957 BFD_ASSERT (r_type == R_PPC_REL14);
9958
9959 if ((r_type == R_PPC_REL14_BRTAKEN
9960 || r_type == R_PPC_REL14_BRNTAKEN)
9961 && delta + 0x8000 < 0x10000
9962 && (bfd_signed_vma) delta < 0)
9963 insn ^= BRANCH_PREDICT_BIT;
9964 }
9965 if (delta + 0x8000 < 0x10000)
9966 {
9967 bfd_put_32 (input_bfd,
9968 (insn & ~0xfffc) | (delta & 0xfffc),
9969 contents + patch_off);
9970 patch_off += 4;
9971 bfd_put_32 (input_bfd,
9972 B | ((offset + 4 - patch_off) & 0x3fffffc),
9973 contents + patch_off);
9974 patch_off += 4;
9975 }
9976 else
9977 {
9978 if (rel != NULL)
9979 {
9980 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9981
9982 relend[-1].r_offset += 8;
9983 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9984 }
9985 bfd_put_32 (input_bfd,
9986 (insn & ~0xfffc) | 8,
9987 contents + patch_off);
9988 patch_off += 4;
9989 bfd_put_32 (input_bfd,
9990 B | ((offset + 4 - patch_off) & 0x3fffffc),
9991 contents + patch_off);
9992 patch_off += 4;
9993 bfd_put_32 (input_bfd,
9994 B | ((delta - 8) & 0x3fffffc),
9995 contents + patch_off);
9996 patch_off += 4;
9997 }
9998 }
9999 else
10000 {
10001 bfd_put_32 (input_bfd, insn, contents + patch_off);
10002 patch_off += 4;
10003 bfd_put_32 (input_bfd,
10004 B | ((offset + 4 - patch_off) & 0x3fffffc),
10005 contents + patch_off);
10006 patch_off += 4;
10007 }
10008 BFD_ASSERT (patch_off <= input_section->size);
10009 relax_info->workaround_size = input_section->size - patch_off;
10010 }
10011 }
10012
10013 return ret;
10014 }
10015 \f
10016 /* Finish up dynamic symbol handling. We set the contents of various
10017 dynamic sections here. */
10018
10019 static bfd_boolean
10020 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10021 struct bfd_link_info *info,
10022 struct elf_link_hash_entry *h,
10023 Elf_Internal_Sym *sym)
10024 {
10025 struct ppc_elf_link_hash_table *htab;
10026 struct plt_entry *ent;
10027 bfd_boolean doneone;
10028
10029 #ifdef DEBUG
10030 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10031 h->root.root.string);
10032 #endif
10033
10034 htab = ppc_elf_hash_table (info);
10035 BFD_ASSERT (htab->elf.dynobj != NULL);
10036
10037 doneone = FALSE;
10038 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10039 if (ent->plt.offset != (bfd_vma) -1)
10040 {
10041 if (!doneone)
10042 {
10043 Elf_Internal_Rela rela;
10044 bfd_byte *loc;
10045 bfd_vma reloc_index;
10046
10047 if (htab->plt_type == PLT_NEW
10048 || !htab->elf.dynamic_sections_created
10049 || h->dynindx == -1)
10050 reloc_index = ent->plt.offset / 4;
10051 else
10052 {
10053 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10054 / htab->plt_slot_size);
10055 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10056 && htab->plt_type == PLT_OLD)
10057 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10058 }
10059
10060 /* This symbol has an entry in the procedure linkage table.
10061 Set it up. */
10062 if (htab->plt_type == PLT_VXWORKS
10063 && htab->elf.dynamic_sections_created
10064 && h->dynindx != -1)
10065 {
10066 bfd_vma got_offset;
10067 const bfd_vma *plt_entry;
10068
10069 /* The first three entries in .got.plt are reserved. */
10070 got_offset = (reloc_index + 3) * 4;
10071
10072 /* Use the right PLT. */
10073 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10074 : ppc_elf_vxworks_plt_entry;
10075
10076 /* Fill in the .plt on VxWorks. */
10077 if (bfd_link_pic (info))
10078 {
10079 bfd_put_32 (output_bfd,
10080 plt_entry[0] | PPC_HA (got_offset),
10081 htab->plt->contents + ent->plt.offset + 0);
10082 bfd_put_32 (output_bfd,
10083 plt_entry[1] | PPC_LO (got_offset),
10084 htab->plt->contents + ent->plt.offset + 4);
10085 }
10086 else
10087 {
10088 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10089
10090 bfd_put_32 (output_bfd,
10091 plt_entry[0] | PPC_HA (got_loc),
10092 htab->plt->contents + ent->plt.offset + 0);
10093 bfd_put_32 (output_bfd,
10094 plt_entry[1] | PPC_LO (got_loc),
10095 htab->plt->contents + ent->plt.offset + 4);
10096 }
10097
10098 bfd_put_32 (output_bfd, plt_entry[2],
10099 htab->plt->contents + ent->plt.offset + 8);
10100 bfd_put_32 (output_bfd, plt_entry[3],
10101 htab->plt->contents + ent->plt.offset + 12);
10102
10103 /* This instruction is an immediate load. The value loaded is
10104 the byte offset of the R_PPC_JMP_SLOT relocation from the
10105 start of the .rela.plt section. The value is stored in the
10106 low-order 16 bits of the load instruction. */
10107 /* NOTE: It appears that this is now an index rather than a
10108 prescaled offset. */
10109 bfd_put_32 (output_bfd,
10110 plt_entry[4] | reloc_index,
10111 htab->plt->contents + ent->plt.offset + 16);
10112 /* This instruction is a PC-relative branch whose target is
10113 the start of the PLT section. The address of this branch
10114 instruction is 20 bytes beyond the start of this PLT entry.
10115 The address is encoded in bits 6-29, inclusive. The value
10116 stored is right-shifted by two bits, permitting a 26-bit
10117 offset. */
10118 bfd_put_32 (output_bfd,
10119 (plt_entry[5]
10120 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10121 htab->plt->contents + ent->plt.offset + 20);
10122 bfd_put_32 (output_bfd, plt_entry[6],
10123 htab->plt->contents + ent->plt.offset + 24);
10124 bfd_put_32 (output_bfd, plt_entry[7],
10125 htab->plt->contents + ent->plt.offset + 28);
10126
10127 /* Fill in the GOT entry corresponding to this PLT slot with
10128 the address immediately after the "bctr" instruction
10129 in this PLT entry. */
10130 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
10131 + htab->plt->output_offset
10132 + ent->plt.offset + 16),
10133 htab->sgotplt->contents + got_offset);
10134
10135 if (!bfd_link_pic (info))
10136 {
10137 /* Fill in a couple of entries in .rela.plt.unloaded. */
10138 loc = htab->srelplt2->contents
10139 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10140 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10141 * sizeof (Elf32_External_Rela));
10142
10143 /* Provide the @ha relocation for the first instruction. */
10144 rela.r_offset = (htab->plt->output_section->vma
10145 + htab->plt->output_offset
10146 + ent->plt.offset + 2);
10147 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10148 R_PPC_ADDR16_HA);
10149 rela.r_addend = got_offset;
10150 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10151 loc += sizeof (Elf32_External_Rela);
10152
10153 /* Provide the @l relocation for the second instruction. */
10154 rela.r_offset = (htab->plt->output_section->vma
10155 + htab->plt->output_offset
10156 + ent->plt.offset + 6);
10157 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10158 R_PPC_ADDR16_LO);
10159 rela.r_addend = got_offset;
10160 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10161 loc += sizeof (Elf32_External_Rela);
10162
10163 /* Provide a relocation for the GOT entry corresponding to this
10164 PLT slot. Point it at the middle of the .plt entry. */
10165 rela.r_offset = (htab->sgotplt->output_section->vma
10166 + htab->sgotplt->output_offset
10167 + got_offset);
10168 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10169 R_PPC_ADDR32);
10170 rela.r_addend = ent->plt.offset + 16;
10171 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10172 }
10173
10174 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10175 In particular, the offset for the relocation is not the
10176 address of the PLT entry for this function, as specified
10177 by the ABI. Instead, the offset is set to the address of
10178 the GOT slot for this function. See EABI 4.4.4.1. */
10179 rela.r_offset = (htab->sgotplt->output_section->vma
10180 + htab->sgotplt->output_offset
10181 + got_offset);
10182
10183 }
10184 else
10185 {
10186 asection *splt = htab->plt;
10187 if (!htab->elf.dynamic_sections_created
10188 || h->dynindx == -1)
10189 splt = htab->iplt;
10190
10191 rela.r_offset = (splt->output_section->vma
10192 + splt->output_offset
10193 + ent->plt.offset);
10194 if (htab->plt_type == PLT_OLD
10195 || !htab->elf.dynamic_sections_created
10196 || h->dynindx == -1)
10197 {
10198 /* We don't need to fill in the .plt. The ppc dynamic
10199 linker will fill it in. */
10200 }
10201 else
10202 {
10203 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10204 + htab->glink->output_section->vma
10205 + htab->glink->output_offset);
10206 bfd_put_32 (output_bfd, val,
10207 splt->contents + ent->plt.offset);
10208 }
10209 }
10210
10211 /* Fill in the entry in the .rela.plt section. */
10212 rela.r_addend = 0;
10213 if (!htab->elf.dynamic_sections_created
10214 || h->dynindx == -1)
10215 {
10216 BFD_ASSERT (h->type == STT_GNU_IFUNC
10217 && h->def_regular
10218 && (h->root.type == bfd_link_hash_defined
10219 || h->root.type == bfd_link_hash_defweak));
10220 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10221 rela.r_addend = SYM_VAL (h);
10222 }
10223 else
10224 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10225
10226 if (!htab->elf.dynamic_sections_created
10227 || h->dynindx == -1)
10228 loc = (htab->reliplt->contents
10229 + (htab->reliplt->reloc_count++
10230 * sizeof (Elf32_External_Rela)));
10231 else
10232 loc = (htab->relplt->contents
10233 + reloc_index * sizeof (Elf32_External_Rela));
10234 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10235
10236 if (!h->def_regular)
10237 {
10238 /* Mark the symbol as undefined, rather than as
10239 defined in the .plt section. Leave the value if
10240 there were any relocations where pointer equality
10241 matters (this is a clue for the dynamic linker, to
10242 make function pointer comparisons work between an
10243 application and shared library), otherwise set it
10244 to zero. */
10245 sym->st_shndx = SHN_UNDEF;
10246 if (!h->pointer_equality_needed)
10247 sym->st_value = 0;
10248 else if (!h->ref_regular_nonweak)
10249 {
10250 /* This breaks function pointer comparisons, but
10251 that is better than breaking tests for a NULL
10252 function pointer. */
10253 sym->st_value = 0;
10254 }
10255 }
10256 else if (h->type == STT_GNU_IFUNC
10257 && !bfd_link_pic (info))
10258 {
10259 /* Set the value of ifunc symbols in a non-pie
10260 executable to the glink entry. This is to avoid
10261 text relocations. We can't do this for ifunc in
10262 allocate_dynrelocs, as we do for normal dynamic
10263 function symbols with plt entries, because we need
10264 to keep the original value around for the ifunc
10265 relocation. */
10266 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10267 (output_bfd, htab->glink->output_section));
10268 sym->st_value = (ent->glink_offset
10269 + htab->glink->output_offset
10270 + htab->glink->output_section->vma);
10271 }
10272 doneone = TRUE;
10273 }
10274
10275 if (htab->plt_type == PLT_NEW
10276 || !htab->elf.dynamic_sections_created
10277 || h->dynindx == -1)
10278 {
10279 unsigned char *p;
10280 asection *splt = htab->plt;
10281 if (!htab->elf.dynamic_sections_created
10282 || h->dynindx == -1)
10283 splt = htab->iplt;
10284
10285 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10286
10287 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10288 {
10289 bfd_put_32 (output_bfd, LWZ_11_3, p);
10290 p += 4;
10291 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10292 p += 4;
10293 bfd_put_32 (output_bfd, MR_0_3, p);
10294 p += 4;
10295 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10296 p += 4;
10297 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10298 p += 4;
10299 bfd_put_32 (output_bfd, BEQLR, p);
10300 p += 4;
10301 bfd_put_32 (output_bfd, MR_3_0, p);
10302 p += 4;
10303 bfd_put_32 (output_bfd, NOP, p);
10304 p += 4;
10305 }
10306
10307 write_glink_stub (ent, splt, p, info);
10308
10309 if (!bfd_link_pic (info))
10310 /* We only need one non-PIC glink stub. */
10311 break;
10312 }
10313 else
10314 break;
10315 }
10316
10317 if (h->needs_copy)
10318 {
10319 asection *s;
10320 Elf_Internal_Rela rela;
10321 bfd_byte *loc;
10322
10323 /* This symbols needs a copy reloc. Set it up. */
10324
10325 #ifdef DEBUG
10326 fprintf (stderr, ", copy");
10327 #endif
10328
10329 BFD_ASSERT (h->dynindx != -1);
10330
10331 if (ppc_elf_hash_entry (h)->has_sda_refs)
10332 s = htab->relsbss;
10333 else
10334 s = htab->relbss;
10335 BFD_ASSERT (s != NULL);
10336
10337 rela.r_offset = SYM_VAL (h);
10338 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10339 rela.r_addend = 0;
10340 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10341 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10342 }
10343
10344 #ifdef DEBUG
10345 fprintf (stderr, "\n");
10346 #endif
10347
10348 return TRUE;
10349 }
10350 \f
10351 static enum elf_reloc_type_class
10352 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10353 const asection *rel_sec,
10354 const Elf_Internal_Rela *rela)
10355 {
10356 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10357
10358 if (rel_sec == htab->reliplt)
10359 return reloc_class_ifunc;
10360
10361 switch (ELF32_R_TYPE (rela->r_info))
10362 {
10363 case R_PPC_RELATIVE:
10364 return reloc_class_relative;
10365 case R_PPC_JMP_SLOT:
10366 return reloc_class_plt;
10367 case R_PPC_COPY:
10368 return reloc_class_copy;
10369 default:
10370 return reloc_class_normal;
10371 }
10372 }
10373 \f
10374 /* Finish up the dynamic sections. */
10375
10376 static bfd_boolean
10377 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10378 struct bfd_link_info *info)
10379 {
10380 asection *sdyn;
10381 asection *splt;
10382 struct ppc_elf_link_hash_table *htab;
10383 bfd_vma got;
10384 bfd *dynobj;
10385 bfd_boolean ret = TRUE;
10386
10387 #ifdef DEBUG
10388 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10389 #endif
10390
10391 htab = ppc_elf_hash_table (info);
10392 dynobj = elf_hash_table (info)->dynobj;
10393 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10394 if (htab->is_vxworks)
10395 splt = bfd_get_linker_section (dynobj, ".plt");
10396 else
10397 splt = NULL;
10398
10399 got = 0;
10400 if (htab->elf.hgot != NULL)
10401 got = SYM_VAL (htab->elf.hgot);
10402
10403 if (htab->elf.dynamic_sections_created)
10404 {
10405 Elf32_External_Dyn *dyncon, *dynconend;
10406
10407 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
10408
10409 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10410 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10411 for (; dyncon < dynconend; dyncon++)
10412 {
10413 Elf_Internal_Dyn dyn;
10414 asection *s;
10415
10416 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10417
10418 switch (dyn.d_tag)
10419 {
10420 case DT_PLTGOT:
10421 if (htab->is_vxworks)
10422 s = htab->sgotplt;
10423 else
10424 s = htab->plt;
10425 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10426 break;
10427
10428 case DT_PLTRELSZ:
10429 dyn.d_un.d_val = htab->relplt->size;
10430 break;
10431
10432 case DT_JMPREL:
10433 s = htab->relplt;
10434 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10435 break;
10436
10437 case DT_PPC_GOT:
10438 dyn.d_un.d_ptr = got;
10439 break;
10440
10441 case DT_RELASZ:
10442 if (htab->is_vxworks)
10443 {
10444 if (htab->relplt)
10445 dyn.d_un.d_ptr -= htab->relplt->size;
10446 break;
10447 }
10448 continue;
10449
10450 default:
10451 if (htab->is_vxworks
10452 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10453 break;
10454 continue;
10455 }
10456
10457 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10458 }
10459 }
10460
10461 if (htab->got != NULL)
10462 {
10463 if (htab->elf.hgot->root.u.def.section == htab->got
10464 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
10465 {
10466 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10467
10468 p += htab->elf.hgot->root.u.def.value;
10469 if (htab->plt_type == PLT_OLD)
10470 {
10471 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10472 so that a function can easily find the address of
10473 _GLOBAL_OFFSET_TABLE_. */
10474 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10475 < htab->elf.hgot->root.u.def.section->size);
10476 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10477 }
10478
10479 if (sdyn != NULL)
10480 {
10481 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10482 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10483 < htab->elf.hgot->root.u.def.section->size);
10484 bfd_put_32 (output_bfd, val, p);
10485 }
10486 }
10487 else
10488 {
10489 /* xgettext:c-format */
10490 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10491 htab->elf.hgot->root.root.string,
10492 (htab->sgotplt != NULL
10493 ? htab->sgotplt->name : htab->got->name));
10494 bfd_set_error (bfd_error_bad_value);
10495 ret = FALSE;
10496 }
10497
10498 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
10499 }
10500
10501 /* Fill in the first entry in the VxWorks procedure linkage table. */
10502 if (splt && splt->size > 0)
10503 {
10504 /* Use the right PLT. */
10505 const bfd_vma *plt_entry = (bfd_link_pic (info)
10506 ? ppc_elf_vxworks_pic_plt0_entry
10507 : ppc_elf_vxworks_plt0_entry);
10508
10509 if (!bfd_link_pic (info))
10510 {
10511 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10512
10513 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10514 splt->contents + 0);
10515 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10516 splt->contents + 4);
10517 }
10518 else
10519 {
10520 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10521 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10522 }
10523 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10524 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10525 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10526 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10527 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10528 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10529
10530 if (! bfd_link_pic (info))
10531 {
10532 Elf_Internal_Rela rela;
10533 bfd_byte *loc;
10534
10535 loc = htab->srelplt2->contents;
10536
10537 /* Output the @ha relocation for the first instruction. */
10538 rela.r_offset = (htab->plt->output_section->vma
10539 + htab->plt->output_offset
10540 + 2);
10541 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10542 rela.r_addend = 0;
10543 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10544 loc += sizeof (Elf32_External_Rela);
10545
10546 /* Output the @l relocation for the second instruction. */
10547 rela.r_offset = (htab->plt->output_section->vma
10548 + htab->plt->output_offset
10549 + 6);
10550 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10551 rela.r_addend = 0;
10552 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10553 loc += sizeof (Elf32_External_Rela);
10554
10555 /* Fix up the remaining relocations. They may have the wrong
10556 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10557 in which symbols were output. */
10558 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10559 {
10560 Elf_Internal_Rela rel;
10561
10562 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10563 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10564 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10565 loc += sizeof (Elf32_External_Rela);
10566
10567 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10568 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10569 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10570 loc += sizeof (Elf32_External_Rela);
10571
10572 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10573 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10574 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10575 loc += sizeof (Elf32_External_Rela);
10576 }
10577 }
10578 }
10579
10580 if (htab->glink != NULL
10581 && htab->glink->contents != NULL
10582 && htab->elf.dynamic_sections_created)
10583 {
10584 unsigned char *p;
10585 unsigned char *endp;
10586 bfd_vma res0;
10587 unsigned int i;
10588
10589 /*
10590 * PIC glink code is the following:
10591 *
10592 * # ith PLT code stub.
10593 * addis 11,30,(plt+(i-1)*4-got)@ha
10594 * lwz 11,(plt+(i-1)*4-got)@l(11)
10595 * mtctr 11
10596 * bctr
10597 *
10598 * # A table of branches, one for each plt entry.
10599 * # The idea is that the plt call stub loads ctr and r11 with these
10600 * # addresses, so (r11 - res_0) gives the plt index * 4.
10601 * res_0: b PLTresolve
10602 * res_1: b PLTresolve
10603 * .
10604 * # Some number of entries towards the end can be nops
10605 * res_n_m3: nop
10606 * res_n_m2: nop
10607 * res_n_m1:
10608 *
10609 * PLTresolve:
10610 * addis 11,11,(1f-res_0)@ha
10611 * mflr 0
10612 * bcl 20,31,1f
10613 * 1: addi 11,11,(1b-res_0)@l
10614 * mflr 12
10615 * mtlr 0
10616 * sub 11,11,12 # r11 = index * 4
10617 * addis 12,12,(got+4-1b)@ha
10618 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10619 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10620 * mtctr 0
10621 * add 0,11,11
10622 * add 11,0,11 # r11 = index * 12 = reloc offset.
10623 * bctr
10624 */
10625 static const unsigned int pic_plt_resolve[] =
10626 {
10627 ADDIS_11_11,
10628 MFLR_0,
10629 BCL_20_31,
10630 ADDI_11_11,
10631 MFLR_12,
10632 MTLR_0,
10633 SUB_11_11_12,
10634 ADDIS_12_12,
10635 LWZ_0_12,
10636 LWZ_12_12,
10637 MTCTR_0,
10638 ADD_0_11_11,
10639 ADD_11_0_11,
10640 BCTR,
10641 NOP,
10642 NOP
10643 };
10644
10645 /*
10646 * Non-PIC glink code is a little simpler.
10647 *
10648 * # ith PLT code stub.
10649 * lis 11,(plt+(i-1)*4)@ha
10650 * lwz 11,(plt+(i-1)*4)@l(11)
10651 * mtctr 11
10652 * bctr
10653 *
10654 * The branch table is the same, then comes
10655 *
10656 * PLTresolve:
10657 * lis 12,(got+4)@ha
10658 * addis 11,11,(-res_0)@ha
10659 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10660 * addi 11,11,(-res_0)@l # r11 = index * 4
10661 * mtctr 0
10662 * add 0,11,11
10663 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10664 * add 11,0,11 # r11 = index * 12 = reloc offset.
10665 * bctr
10666 */
10667 static const unsigned int plt_resolve[] =
10668 {
10669 LIS_12,
10670 ADDIS_11_11,
10671 LWZ_0_12,
10672 ADDI_11_11,
10673 MTCTR_0,
10674 ADD_0_11_11,
10675 LWZ_12_12,
10676 ADD_11_0_11,
10677 BCTR,
10678 NOP,
10679 NOP,
10680 NOP,
10681 NOP,
10682 NOP,
10683 NOP,
10684 NOP
10685 };
10686
10687 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10688 abort ();
10689 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10690 abort ();
10691
10692 /* Build the branch table, one for each plt entry (less one),
10693 and perhaps some padding. */
10694 p = htab->glink->contents;
10695 p += htab->glink_pltresolve;
10696 endp = htab->glink->contents;
10697 endp += htab->glink->size - GLINK_PLTRESOLVE;
10698 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10699 {
10700 bfd_put_32 (output_bfd, B + endp - p, p);
10701 p += 4;
10702 }
10703 while (p < endp)
10704 {
10705 bfd_put_32 (output_bfd, NOP, p);
10706 p += 4;
10707 }
10708
10709 res0 = (htab->glink_pltresolve
10710 + htab->glink->output_section->vma
10711 + htab->glink->output_offset);
10712
10713 if (htab->params->ppc476_workaround)
10714 {
10715 /* Ensure that a call stub at the end of a page doesn't
10716 result in prefetch over the end of the page into the
10717 glink branch table. */
10718 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10719 bfd_vma page_addr;
10720 bfd_vma glink_start = (htab->glink->output_section->vma
10721 + htab->glink->output_offset);
10722
10723 for (page_addr = res0 & -pagesize;
10724 page_addr > glink_start;
10725 page_addr -= pagesize)
10726 {
10727 /* We have a plt call stub that may need fixing. */
10728 bfd_byte *loc;
10729 unsigned int insn;
10730
10731 loc = htab->glink->contents + page_addr - 4 - glink_start;
10732 insn = bfd_get_32 (output_bfd, loc);
10733 if (insn == BCTR)
10734 {
10735 /* By alignment, we know that there must be at least
10736 one other call stub before this one. */
10737 insn = bfd_get_32 (output_bfd, loc - 16);
10738 if (insn == BCTR)
10739 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10740 else
10741 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10742 }
10743 }
10744 }
10745
10746 /* Last comes the PLTresolve stub. */
10747 if (bfd_link_pic (info))
10748 {
10749 bfd_vma bcl;
10750
10751 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10752 {
10753 unsigned int insn = pic_plt_resolve[i];
10754
10755 if (htab->params->ppc476_workaround && insn == NOP)
10756 insn = BA + 0;
10757 bfd_put_32 (output_bfd, insn, p);
10758 p += 4;
10759 }
10760 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10761
10762 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10763 + htab->glink->output_section->vma
10764 + htab->glink->output_offset);
10765
10766 bfd_put_32 (output_bfd,
10767 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10768 bfd_put_32 (output_bfd,
10769 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10770 bfd_put_32 (output_bfd,
10771 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10772 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10773 {
10774 bfd_put_32 (output_bfd,
10775 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10776 bfd_put_32 (output_bfd,
10777 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10778 }
10779 else
10780 {
10781 bfd_put_32 (output_bfd,
10782 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10783 bfd_put_32 (output_bfd,
10784 LWZ_12_12 + 4, p + 9*4);
10785 }
10786 }
10787 else
10788 {
10789 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10790 {
10791 unsigned int insn = plt_resolve[i];
10792
10793 if (htab->params->ppc476_workaround && insn == NOP)
10794 insn = BA + 0;
10795 bfd_put_32 (output_bfd, insn, p);
10796 p += 4;
10797 }
10798 p -= 4 * ARRAY_SIZE (plt_resolve);
10799
10800 bfd_put_32 (output_bfd,
10801 LIS_12 + PPC_HA (got + 4), p + 0*4);
10802 bfd_put_32 (output_bfd,
10803 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10804 bfd_put_32 (output_bfd,
10805 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10806 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10807 {
10808 bfd_put_32 (output_bfd,
10809 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10810 bfd_put_32 (output_bfd,
10811 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10812 }
10813 else
10814 {
10815 bfd_put_32 (output_bfd,
10816 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10817 bfd_put_32 (output_bfd,
10818 LWZ_12_12 + 4, p + 6*4);
10819 }
10820 }
10821 }
10822
10823 if (htab->glink_eh_frame != NULL
10824 && htab->glink_eh_frame->contents != NULL)
10825 {
10826 unsigned char *p = htab->glink_eh_frame->contents;
10827 bfd_vma val;
10828
10829 p += sizeof (glink_eh_frame_cie);
10830 /* FDE length. */
10831 p += 4;
10832 /* CIE pointer. */
10833 p += 4;
10834 /* Offset to .glink. */
10835 val = (htab->glink->output_section->vma
10836 + htab->glink->output_offset);
10837 val -= (htab->glink_eh_frame->output_section->vma
10838 + htab->glink_eh_frame->output_offset);
10839 val -= p - htab->glink_eh_frame->contents;
10840 bfd_put_32 (htab->elf.dynobj, val, p);
10841
10842 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10843 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10844 htab->glink_eh_frame,
10845 htab->glink_eh_frame->contents))
10846 return FALSE;
10847 }
10848
10849 return ret;
10850 }
10851 \f
10852 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10853 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10854 #define TARGET_BIG_SYM powerpc_elf32_vec
10855 #define TARGET_BIG_NAME "elf32-powerpc"
10856 #define ELF_ARCH bfd_arch_powerpc
10857 #define ELF_TARGET_ID PPC32_ELF_DATA
10858 #define ELF_MACHINE_CODE EM_PPC
10859 #ifdef __QNXTARGET__
10860 #define ELF_MAXPAGESIZE 0x1000
10861 #define ELF_COMMONPAGESIZE 0x1000
10862 #else
10863 #define ELF_MAXPAGESIZE 0x10000
10864 #define ELF_COMMONPAGESIZE 0x10000
10865 #endif
10866 #define ELF_MINPAGESIZE 0x1000
10867 #define elf_info_to_howto ppc_elf_info_to_howto
10868
10869 #ifdef EM_CYGNUS_POWERPC
10870 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10871 #endif
10872
10873 #ifdef EM_PPC_OLD
10874 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10875 #endif
10876
10877 #define elf_backend_plt_not_loaded 1
10878 #define elf_backend_can_gc_sections 1
10879 #define elf_backend_can_refcount 1
10880 #define elf_backend_rela_normal 1
10881 #define elf_backend_caches_rawsize 1
10882
10883 #define bfd_elf32_mkobject ppc_elf_mkobject
10884 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10885 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10886 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10887 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10888 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10889 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10890 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10891
10892 #define elf_backend_object_p ppc_elf_object_p
10893 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10894 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10895 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10896 #define elf_backend_relocate_section ppc_elf_relocate_section
10897 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10898 #define elf_backend_check_relocs ppc_elf_check_relocs
10899 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10900 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10901 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10902 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10903 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10904 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10905 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10906 #define elf_backend_fake_sections ppc_elf_fake_sections
10907 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10908 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10909 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10910 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10911 #define elf_backend_write_core_note ppc_elf_write_core_note
10912 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10913 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10914 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10915 #define elf_backend_write_section ppc_elf_write_section
10916 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10917 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10918 #define elf_backend_action_discarded ppc_elf_action_discarded
10919 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10920 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10921
10922 #include "elf32-target.h"
10923
10924 /* FreeBSD Target */
10925
10926 #undef TARGET_LITTLE_SYM
10927 #undef TARGET_LITTLE_NAME
10928
10929 #undef TARGET_BIG_SYM
10930 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10931 #undef TARGET_BIG_NAME
10932 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10933
10934 #undef ELF_OSABI
10935 #define ELF_OSABI ELFOSABI_FREEBSD
10936
10937 #undef elf32_bed
10938 #define elf32_bed elf32_powerpc_fbsd_bed
10939
10940 #include "elf32-target.h"
10941
10942 /* VxWorks Target */
10943
10944 #undef TARGET_LITTLE_SYM
10945 #undef TARGET_LITTLE_NAME
10946
10947 #undef TARGET_BIG_SYM
10948 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10949 #undef TARGET_BIG_NAME
10950 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10951
10952 #undef ELF_OSABI
10953
10954 /* VxWorks uses the elf default section flags for .plt. */
10955 static const struct bfd_elf_special_section *
10956 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10957 {
10958 if (sec->name == NULL)
10959 return NULL;
10960
10961 if (strcmp (sec->name, ".plt") == 0)
10962 return _bfd_elf_get_sec_type_attr (abfd, sec);
10963
10964 return ppc_elf_get_sec_type_attr (abfd, sec);
10965 }
10966
10967 /* Like ppc_elf_link_hash_table_create, but overrides
10968 appropriately for VxWorks. */
10969 static struct bfd_link_hash_table *
10970 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10971 {
10972 struct bfd_link_hash_table *ret;
10973
10974 ret = ppc_elf_link_hash_table_create (abfd);
10975 if (ret)
10976 {
10977 struct ppc_elf_link_hash_table *htab
10978 = (struct ppc_elf_link_hash_table *)ret;
10979 htab->is_vxworks = 1;
10980 htab->plt_type = PLT_VXWORKS;
10981 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10982 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10983 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10984 }
10985 return ret;
10986 }
10987
10988 /* Tweak magic VxWorks symbols as they are loaded. */
10989 static bfd_boolean
10990 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10991 struct bfd_link_info *info,
10992 Elf_Internal_Sym *sym,
10993 const char **namep ATTRIBUTE_UNUSED,
10994 flagword *flagsp ATTRIBUTE_UNUSED,
10995 asection **secp,
10996 bfd_vma *valp)
10997 {
10998 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10999 valp))
11000 return FALSE;
11001
11002 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
11003 }
11004
11005 static void
11006 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11007 {
11008 ppc_elf_final_write_processing(abfd, linker);
11009 elf_vxworks_final_write_processing(abfd, linker);
11010 }
11011
11012 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11013 define it. */
11014 #undef elf_backend_want_plt_sym
11015 #define elf_backend_want_plt_sym 1
11016 #undef elf_backend_want_got_plt
11017 #define elf_backend_want_got_plt 1
11018 #undef elf_backend_got_symbol_offset
11019 #define elf_backend_got_symbol_offset 0
11020 #undef elf_backend_plt_not_loaded
11021 #define elf_backend_plt_not_loaded 0
11022 #undef elf_backend_plt_readonly
11023 #define elf_backend_plt_readonly 1
11024 #undef elf_backend_got_header_size
11025 #define elf_backend_got_header_size 12
11026
11027 #undef bfd_elf32_get_synthetic_symtab
11028
11029 #undef bfd_elf32_bfd_link_hash_table_create
11030 #define bfd_elf32_bfd_link_hash_table_create \
11031 ppc_elf_vxworks_link_hash_table_create
11032 #undef elf_backend_add_symbol_hook
11033 #define elf_backend_add_symbol_hook \
11034 ppc_elf_vxworks_add_symbol_hook
11035 #undef elf_backend_link_output_symbol_hook
11036 #define elf_backend_link_output_symbol_hook \
11037 elf_vxworks_link_output_symbol_hook
11038 #undef elf_backend_final_write_processing
11039 #define elf_backend_final_write_processing \
11040 ppc_elf_vxworks_final_write_processing
11041 #undef elf_backend_get_sec_type_attr
11042 #define elf_backend_get_sec_type_attr \
11043 ppc_elf_vxworks_get_sec_type_attr
11044 #undef elf_backend_emit_relocs
11045 #define elf_backend_emit_relocs \
11046 elf_vxworks_emit_relocs
11047
11048 #undef elf32_bed
11049 #define elf32_bed ppc_elf_vxworks_bed
11050 #undef elf_backend_post_process_headers
11051
11052 #include "elf32-target.h"
GDB Binutils - Deliverables
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