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[thirdparty/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2017 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 3, /* size (0 = byte, 1 = short, 2 = long) */
191 0, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc_elf_unhandled_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 ppc_elf_unhandled_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 ppc_elf_unhandled_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_unhandled_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 ppc_elf_unhandled_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 ppc_elf_unhandled_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc_elf_unhandled_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc_elf_unhandled_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 ppc_elf_unhandled_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 ppc_elf_unhandled_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc_elf_unhandled_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc_elf_unhandled_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_unhandled_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 ppc_elf_unhandled_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 ppc_elf_unhandled_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 ppc_elf_unhandled_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 ppc_elf_unhandled_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_unhandled_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 ppc_elf_unhandled_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 ppc_elf_unhandled_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 ppc_elf_unhandled_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 ppc_elf_unhandled_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_unhandled_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 ppc_elf_unhandled_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 ppc_elf_unhandled_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 ppc_elf_unhandled_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfffe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 ppc_elf_unhandled_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f07ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 ppc_elf_unhandled_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x3e007ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 ppc_elf_unhandled_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f07ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 ppc_elf_unhandled_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x3e007ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 ppc_elf_unhandled_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f07ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 ppc_elf_unhandled_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x3e007ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 ppc_elf_unhandled_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 ppc_elf_unhandled_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 ppc_elf_unhandled_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f07ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 ppc_elf_unhandled_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x3e007ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 ppc_elf_unhandled_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f07ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 ppc_elf_unhandled_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x3e007ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 ppc_elf_unhandled_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f07ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 ppc_elf_unhandled_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x3e007ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 /* e_li split20 format. */
1660 HOWTO (R_PPC_VLE_ADDR20, /* type */
1661 16, /* rightshift */
1662 2, /* size (0 = byte, 1 = short, 2 = long) */
1663 20, /* bitsize */
1664 FALSE, /* pc_relative */
1665 0, /* bitpos */
1666 complain_overflow_dont, /* complain_on_overflow */
1667 bfd_elf_generic_reloc, /* special_function */
1668 "R_PPC_VLE_ADDR20", /* name */
1669 FALSE, /* partial_inplace */
1670 0, /* src_mask */
1671 0x1f07ff, /* dst_mask */
1672 FALSE), /* pcrel_offset */
1673
1674 HOWTO (R_PPC_IRELATIVE, /* type */
1675 0, /* rightshift */
1676 2, /* size (0 = byte, 1 = short, 2 = long) */
1677 32, /* bitsize */
1678 FALSE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_dont, /* complain_on_overflow */
1681 ppc_elf_unhandled_reloc, /* special_function */
1682 "R_PPC_IRELATIVE", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffffffff, /* dst_mask */
1686 FALSE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation. */
1689 HOWTO (R_PPC_REL16, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_signed, /* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* A 16 bit relative relocation without overflow. */
1704 HOWTO (R_PPC_REL16_LO, /* type */
1705 0, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont,/* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_LO", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address. */
1719 HOWTO (R_PPC_REL16_HI, /* 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 bfd_elf_generic_reloc, /* special_function */
1727 "R_PPC_REL16_HI", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 TRUE), /* pcrel_offset */
1732
1733 /* The high order 16 bits of a relative address, plus 1 if the contents of
1734 the low 16 bits, treated as a signed number, is negative. */
1735 HOWTO (R_PPC_REL16_HA, /* type */
1736 16, /* rightshift */
1737 1, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 TRUE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 ppc_elf_addr16_ha_reloc, /* special_function */
1743 "R_PPC_REL16_HA", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0xffff, /* dst_mask */
1747 TRUE), /* pcrel_offset */
1748
1749 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1750 HOWTO (R_PPC_REL16DX_HA, /* type */
1751 16, /* rightshift */
1752 2, /* size (0 = byte, 1 = short, 2 = long) */
1753 16, /* bitsize */
1754 TRUE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_signed, /* complain_on_overflow */
1757 ppc_elf_addr16_ha_reloc, /* special_function */
1758 "R_PPC_REL16DX_HA", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0x1fffc1, /* dst_mask */
1762 TRUE), /* pcrel_offset */
1763
1764 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1765 HOWTO (R_PPC_16DX_HA, /* type */
1766 16, /* rightshift */
1767 2, /* size (0 = byte, 1 = short, 2 = long) */
1768 16, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_signed, /* complain_on_overflow */
1772 ppc_elf_addr16_ha_reloc, /* special_function */
1773 "R_PPC_16DX_HA", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0x1fffc1, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* GNU extension to record C++ vtable hierarchy. */
1780 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1781 0, /* rightshift */
1782 0, /* size (0 = byte, 1 = short, 2 = long) */
1783 0, /* bitsize */
1784 FALSE, /* pc_relative */
1785 0, /* bitpos */
1786 complain_overflow_dont, /* complain_on_overflow */
1787 NULL, /* special_function */
1788 "R_PPC_GNU_VTINHERIT", /* name */
1789 FALSE, /* partial_inplace */
1790 0, /* src_mask */
1791 0, /* dst_mask */
1792 FALSE), /* pcrel_offset */
1793
1794 /* GNU extension to record C++ vtable member usage. */
1795 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1796 0, /* rightshift */
1797 0, /* size (0 = byte, 1 = short, 2 = long) */
1798 0, /* bitsize */
1799 FALSE, /* pc_relative */
1800 0, /* bitpos */
1801 complain_overflow_dont, /* complain_on_overflow */
1802 NULL, /* special_function */
1803 "R_PPC_GNU_VTENTRY", /* name */
1804 FALSE, /* partial_inplace */
1805 0, /* src_mask */
1806 0, /* dst_mask */
1807 FALSE), /* pcrel_offset */
1808
1809 /* Phony reloc to handle AIX style TOC entries. */
1810 HOWTO (R_PPC_TOC16, /* type */
1811 0, /* rightshift */
1812 1, /* size (0 = byte, 1 = short, 2 = long) */
1813 16, /* bitsize */
1814 FALSE, /* pc_relative */
1815 0, /* bitpos */
1816 complain_overflow_signed, /* complain_on_overflow */
1817 ppc_elf_unhandled_reloc, /* special_function */
1818 "R_PPC_TOC16", /* name */
1819 FALSE, /* partial_inplace */
1820 0, /* src_mask */
1821 0xffff, /* dst_mask */
1822 FALSE), /* pcrel_offset */
1823 };
1824 \f
1825 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1826
1827 static void
1828 ppc_elf_howto_init (void)
1829 {
1830 unsigned int i, type;
1831
1832 for (i = 0;
1833 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1834 i++)
1835 {
1836 type = ppc_elf_howto_raw[i].type;
1837 if (type >= (sizeof (ppc_elf_howto_table)
1838 / sizeof (ppc_elf_howto_table[0])))
1839 abort ();
1840 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1841 }
1842 }
1843
1844 static reloc_howto_type *
1845 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1846 bfd_reloc_code_real_type code)
1847 {
1848 enum elf_ppc_reloc_type r;
1849
1850 /* Initialize howto table if not already done. */
1851 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1852 ppc_elf_howto_init ();
1853
1854 switch (code)
1855 {
1856 default:
1857 return NULL;
1858
1859 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1860 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1861 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1862 case BFD_RELOC_PPC64_ADDR16_DS:
1863 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1864 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1865 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1866 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1867 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1868 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1869 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1870 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1871 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1872 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1873 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1874 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1875 case BFD_RELOC_PPC64_GOT16_DS:
1876 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1877 case BFD_RELOC_PPC64_GOT16_LO_DS:
1878 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1879 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1880 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1881 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1882 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1883 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1884 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1885 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1886 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1887 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1888 case BFD_RELOC_PPC64_PLT16_LO_DS:
1889 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1890 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1891 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1892 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1893 case BFD_RELOC_PPC64_SECTOFF_DS:
1894 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1895 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1896 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1897 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1898 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1899 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1900 case BFD_RELOC_PPC64_TOC16_DS:
1901 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1902 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1903 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1904 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1905 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1906 case BFD_RELOC_PPC64_TPREL16_DS:
1907 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1908 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1909 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1910 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1911 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1912 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1913 case BFD_RELOC_PPC64_DTPREL16_DS:
1914 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1915 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1916 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1917 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1918 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1919 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1920 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1921 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1922 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1923 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1924 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1925 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1926 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1927 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1928 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1929 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1930 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1931 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1932 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1933 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1934 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1935 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1936 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1937 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1938 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1939 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1940 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1941 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1942 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1943 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1944 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1945 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1946 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1947 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1948 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1949 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1950 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1951 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1952 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1953 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1954 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1955 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1956 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1957 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1958 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1959 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1960 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1961 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1962 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1963 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1964 r = R_PPC_VLE_SDAREL_LO16A;
1965 break;
1966 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1967 r = R_PPC_VLE_SDAREL_LO16D;
1968 break;
1969 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1970 r = R_PPC_VLE_SDAREL_HI16A;
1971 break;
1972 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1973 r = R_PPC_VLE_SDAREL_HI16D;
1974 break;
1975 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1976 r = R_PPC_VLE_SDAREL_HA16A;
1977 break;
1978 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1979 r = R_PPC_VLE_SDAREL_HA16D;
1980 break;
1981 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1982 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1983 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1984 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1985 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
1986 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
1987 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1988 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1989 }
1990
1991 return ppc_elf_howto_table[r];
1992 };
1993
1994 static reloc_howto_type *
1995 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1996 const char *r_name)
1997 {
1998 unsigned int i;
1999
2000 for (i = 0;
2001 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2002 i++)
2003 if (ppc_elf_howto_raw[i].name != NULL
2004 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2005 return &ppc_elf_howto_raw[i];
2006
2007 return NULL;
2008 }
2009
2010 /* Set the howto pointer for a PowerPC ELF reloc. */
2011
2012 static void
2013 ppc_elf_info_to_howto (bfd *abfd,
2014 arelent *cache_ptr,
2015 Elf_Internal_Rela *dst)
2016 {
2017 unsigned int r_type;
2018
2019 /* Initialize howto table if not already done. */
2020 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2021 ppc_elf_howto_init ();
2022
2023 r_type = ELF32_R_TYPE (dst->r_info);
2024 if (r_type >= R_PPC_max)
2025 {
2026 /* xgettext:c-format */
2027 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2028 abfd, r_type);
2029 bfd_set_error (bfd_error_bad_value);
2030 r_type = R_PPC_NONE;
2031 }
2032 cache_ptr->howto = ppc_elf_howto_table[r_type];
2033
2034 /* Just because the above assert didn't trigger doesn't mean that
2035 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2036 if (!cache_ptr->howto)
2037 {
2038 /* xgettext:c-format */
2039 _bfd_error_handler (_("%B: invalid relocation type %d"),
2040 abfd, r_type);
2041 bfd_set_error (bfd_error_bad_value);
2042
2043 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2044 }
2045 }
2046
2047 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2048
2049 static bfd_reloc_status_type
2050 ppc_elf_addr16_ha_reloc (bfd *abfd,
2051 arelent *reloc_entry,
2052 asymbol *symbol,
2053 void *data,
2054 asection *input_section,
2055 bfd *output_bfd,
2056 char **error_message ATTRIBUTE_UNUSED)
2057 {
2058 enum elf_ppc_reloc_type r_type;
2059 long insn;
2060 bfd_size_type octets;
2061 bfd_vma value;
2062
2063 if (output_bfd != NULL)
2064 {
2065 reloc_entry->address += input_section->output_offset;
2066 return bfd_reloc_ok;
2067 }
2068
2069 reloc_entry->addend += 0x8000;
2070 r_type = reloc_entry->howto->type;
2071 if (r_type != R_PPC_REL16DX_HA)
2072 return bfd_reloc_continue;
2073
2074 value = 0;
2075 if (!bfd_is_com_section (symbol->section))
2076 value = symbol->value;
2077 value += (reloc_entry->addend
2078 + symbol->section->output_offset
2079 + symbol->section->output_section->vma);
2080 value -= (reloc_entry->address
2081 + input_section->output_offset
2082 + input_section->output_section->vma);
2083 value >>= 16;
2084
2085 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2086 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2087 insn &= ~0x1fffc1;
2088 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2089 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2090 return bfd_reloc_ok;
2091 }
2092
2093 static bfd_reloc_status_type
2094 ppc_elf_unhandled_reloc (bfd *abfd,
2095 arelent *reloc_entry,
2096 asymbol *symbol,
2097 void *data,
2098 asection *input_section,
2099 bfd *output_bfd,
2100 char **error_message)
2101 {
2102 /* If this is a relocatable link (output_bfd test tells us), just
2103 call the generic function. Any adjustment will be done at final
2104 link time. */
2105 if (output_bfd != NULL)
2106 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2107 input_section, output_bfd, error_message);
2108
2109 if (error_message != NULL)
2110 {
2111 static char buf[60];
2112 sprintf (buf, _("generic linker can't handle %s"),
2113 reloc_entry->howto->name);
2114 *error_message = buf;
2115 }
2116 return bfd_reloc_dangerous;
2117 }
2118 \f
2119 /* Sections created by the linker. */
2120
2121 typedef struct elf_linker_section
2122 {
2123 /* Pointer to the bfd section. */
2124 asection *section;
2125 /* Section name. */
2126 const char *name;
2127 /* Associated bss section name. */
2128 const char *bss_name;
2129 /* Associated symbol name. */
2130 const char *sym_name;
2131 /* Associated symbol. */
2132 struct elf_link_hash_entry *sym;
2133 } elf_linker_section_t;
2134
2135 /* Linked list of allocated pointer entries. This hangs off of the
2136 symbol lists, and provides allows us to return different pointers,
2137 based on different addend's. */
2138
2139 typedef struct elf_linker_section_pointers
2140 {
2141 /* next allocated pointer for this symbol */
2142 struct elf_linker_section_pointers *next;
2143 /* offset of pointer from beginning of section */
2144 bfd_vma offset;
2145 /* addend used */
2146 bfd_vma addend;
2147 /* which linker section this is */
2148 elf_linker_section_t *lsect;
2149 } elf_linker_section_pointers_t;
2150
2151 struct ppc_elf_obj_tdata
2152 {
2153 struct elf_obj_tdata elf;
2154
2155 /* A mapping from local symbols to offsets into the various linker
2156 sections added. This is index by the symbol index. */
2157 elf_linker_section_pointers_t **linker_section_pointers;
2158
2159 /* Flags used to auto-detect plt type. */
2160 unsigned int makes_plt_call : 1;
2161 unsigned int has_rel16 : 1;
2162 };
2163
2164 #define ppc_elf_tdata(bfd) \
2165 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2166
2167 #define elf_local_ptr_offsets(bfd) \
2168 (ppc_elf_tdata (bfd)->linker_section_pointers)
2169
2170 #define is_ppc_elf(bfd) \
2171 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2172 && elf_object_id (bfd) == PPC32_ELF_DATA)
2173
2174 /* Override the generic function because we store some extras. */
2175
2176 static bfd_boolean
2177 ppc_elf_mkobject (bfd *abfd)
2178 {
2179 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2180 PPC32_ELF_DATA);
2181 }
2182
2183 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2184
2185 bfd_boolean
2186 _bfd_elf_ppc_set_arch (bfd *abfd)
2187 {
2188 unsigned long mach = 0;
2189 asection *s;
2190 unsigned char *contents;
2191
2192 if (abfd->arch_info->bits_per_word == 32
2193 && bfd_big_endian (abfd))
2194 {
2195
2196 for (s = abfd->sections; s != NULL; s = s->next)
2197 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2198 break;
2199 if (s != NULL)
2200 mach = bfd_mach_ppc_vle;
2201 }
2202
2203 if (mach == 0)
2204 {
2205 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2206 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2207 {
2208 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2209 unsigned int i;
2210
2211 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2212 {
2213 unsigned int val = bfd_get_32 (abfd, contents + i);
2214 switch (val >> 16)
2215 {
2216 case PPC_APUINFO_PMR:
2217 case PPC_APUINFO_RFMCI:
2218 if (mach == 0)
2219 mach = bfd_mach_ppc_titan;
2220 break;
2221
2222 case PPC_APUINFO_ISEL:
2223 case PPC_APUINFO_CACHELCK:
2224 if (mach == bfd_mach_ppc_titan)
2225 mach = bfd_mach_ppc_e500mc;
2226 break;
2227
2228 case PPC_APUINFO_SPE:
2229 case PPC_APUINFO_EFS:
2230 case PPC_APUINFO_BRLOCK:
2231 if (mach != bfd_mach_ppc_vle)
2232 mach = bfd_mach_ppc_e500;
2233 break;
2234
2235 case PPC_APUINFO_VLE:
2236 mach = bfd_mach_ppc_vle;
2237 break;
2238
2239 default:
2240 mach = -1ul;
2241 }
2242 }
2243 free (contents);
2244 }
2245 }
2246
2247 if (mach != 0 && mach != -1ul)
2248 {
2249 const bfd_arch_info_type *arch;
2250
2251 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2252 if (arch->mach == mach)
2253 {
2254 abfd->arch_info = arch;
2255 break;
2256 }
2257 }
2258 return TRUE;
2259 }
2260
2261 /* Fix bad default arch selected for a 32 bit input bfd when the
2262 default is 64 bit. Also select arch based on apuinfo. */
2263
2264 static bfd_boolean
2265 ppc_elf_object_p (bfd *abfd)
2266 {
2267 if (!abfd->arch_info->the_default)
2268 return TRUE;
2269
2270 if (abfd->arch_info->bits_per_word == 64)
2271 {
2272 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2273
2274 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2275 {
2276 /* Relies on arch after 64 bit default being 32 bit default. */
2277 abfd->arch_info = abfd->arch_info->next;
2278 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2279 }
2280 }
2281 return _bfd_elf_ppc_set_arch (abfd);
2282 }
2283
2284 /* Function to set whether a module needs the -mrelocatable bit set. */
2285
2286 static bfd_boolean
2287 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2288 {
2289 BFD_ASSERT (!elf_flags_init (abfd)
2290 || elf_elfheader (abfd)->e_flags == flags);
2291
2292 elf_elfheader (abfd)->e_flags = flags;
2293 elf_flags_init (abfd) = TRUE;
2294 return TRUE;
2295 }
2296
2297 /* Support for core dump NOTE sections. */
2298
2299 static bfd_boolean
2300 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2301 {
2302 int offset;
2303 unsigned int size;
2304
2305 switch (note->descsz)
2306 {
2307 default:
2308 return FALSE;
2309
2310 case 268: /* Linux/PPC. */
2311 /* pr_cursig */
2312 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2313
2314 /* pr_pid */
2315 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2316
2317 /* pr_reg */
2318 offset = 72;
2319 size = 192;
2320
2321 break;
2322 }
2323
2324 /* Make a ".reg/999" section. */
2325 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2326 size, note->descpos + offset);
2327 }
2328
2329 static bfd_boolean
2330 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2331 {
2332 switch (note->descsz)
2333 {
2334 default:
2335 return FALSE;
2336
2337 case 128: /* Linux/PPC elf_prpsinfo. */
2338 elf_tdata (abfd)->core->pid
2339 = bfd_get_32 (abfd, note->descdata + 16);
2340 elf_tdata (abfd)->core->program
2341 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2342 elf_tdata (abfd)->core->command
2343 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2344 }
2345
2346 /* Note that for some reason, a spurious space is tacked
2347 onto the end of the args in some (at least one anyway)
2348 implementations, so strip it off if it exists. */
2349
2350 {
2351 char *command = elf_tdata (abfd)->core->command;
2352 int n = strlen (command);
2353
2354 if (0 < n && command[n - 1] == ' ')
2355 command[n - 1] = '\0';
2356 }
2357
2358 return TRUE;
2359 }
2360
2361 static char *
2362 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2363 {
2364 switch (note_type)
2365 {
2366 default:
2367 return NULL;
2368
2369 case NT_PRPSINFO:
2370 {
2371 char data[128];
2372 va_list ap;
2373
2374 va_start (ap, note_type);
2375 memset (data, 0, sizeof (data));
2376 strncpy (data + 32, va_arg (ap, const char *), 16);
2377 strncpy (data + 48, va_arg (ap, const char *), 80);
2378 va_end (ap);
2379 return elfcore_write_note (abfd, buf, bufsiz,
2380 "CORE", note_type, data, sizeof (data));
2381 }
2382
2383 case NT_PRSTATUS:
2384 {
2385 char data[268];
2386 va_list ap;
2387 long pid;
2388 int cursig;
2389 const void *greg;
2390
2391 va_start (ap, note_type);
2392 memset (data, 0, 72);
2393 pid = va_arg (ap, long);
2394 bfd_put_32 (abfd, pid, data + 24);
2395 cursig = va_arg (ap, int);
2396 bfd_put_16 (abfd, cursig, data + 12);
2397 greg = va_arg (ap, const void *);
2398 memcpy (data + 72, greg, 192);
2399 memset (data + 264, 0, 4);
2400 va_end (ap);
2401 return elfcore_write_note (abfd, buf, bufsiz,
2402 "CORE", note_type, data, sizeof (data));
2403 }
2404 }
2405 }
2406
2407 static flagword
2408 ppc_elf_lookup_section_flags (char *flag_name)
2409 {
2410
2411 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2412 return SHF_PPC_VLE;
2413
2414 return 0;
2415 }
2416
2417 /* Return address for Ith PLT stub in section PLT, for relocation REL
2418 or (bfd_vma) -1 if it should not be included. */
2419
2420 static bfd_vma
2421 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2422 const asection *plt ATTRIBUTE_UNUSED,
2423 const arelent *rel)
2424 {
2425 return rel->address;
2426 }
2427
2428 /* Handle a PowerPC specific section when reading an object file. This
2429 is called when bfd_section_from_shdr finds a section with an unknown
2430 type. */
2431
2432 static bfd_boolean
2433 ppc_elf_section_from_shdr (bfd *abfd,
2434 Elf_Internal_Shdr *hdr,
2435 const char *name,
2436 int shindex)
2437 {
2438 asection *newsect;
2439 flagword flags;
2440
2441 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2442 return FALSE;
2443
2444 newsect = hdr->bfd_section;
2445 flags = bfd_get_section_flags (abfd, newsect);
2446 if (hdr->sh_flags & SHF_EXCLUDE)
2447 flags |= SEC_EXCLUDE;
2448
2449 if (hdr->sh_type == SHT_ORDERED)
2450 flags |= SEC_SORT_ENTRIES;
2451
2452 bfd_set_section_flags (abfd, newsect, flags);
2453 return TRUE;
2454 }
2455
2456 /* Set up any other section flags and such that may be necessary. */
2457
2458 static bfd_boolean
2459 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2460 Elf_Internal_Shdr *shdr,
2461 asection *asect)
2462 {
2463 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2464 shdr->sh_type = SHT_ORDERED;
2465
2466 return TRUE;
2467 }
2468
2469 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2470 need to bump up the number of section headers. */
2471
2472 static int
2473 ppc_elf_additional_program_headers (bfd *abfd,
2474 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2475 {
2476 asection *s;
2477 int ret = 0;
2478
2479 s = bfd_get_section_by_name (abfd, ".sbss2");
2480 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2481 ++ret;
2482
2483 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2484 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2485 ++ret;
2486
2487 return ret;
2488 }
2489
2490 /* Modify the segment map for VLE executables. */
2491
2492 bfd_boolean
2493 ppc_elf_modify_segment_map (bfd *abfd,
2494 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2495 {
2496 struct elf_segment_map *m;
2497
2498 /* At this point in the link, output sections have already been sorted by
2499 LMA and assigned to segments. All that is left to do is to ensure
2500 there is no mixing of VLE & non-VLE sections in a text segment.
2501 If we find that case, we split the segment.
2502 We maintain the original output section order. */
2503
2504 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2505 {
2506 struct elf_segment_map *n;
2507 bfd_size_type amt;
2508 unsigned int j, k;
2509 unsigned int p_flags;
2510
2511 if (m->p_type != PT_LOAD || m->count == 0)
2512 continue;
2513
2514 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2515 {
2516 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2517 p_flags |= PF_W;
2518 if ((m->sections[j]->flags & SEC_CODE) != 0)
2519 {
2520 p_flags |= PF_X;
2521 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2522 p_flags |= PF_PPC_VLE;
2523 break;
2524 }
2525 }
2526 if (j != m->count)
2527 while (++j != m->count)
2528 {
2529 unsigned int p_flags1 = PF_R;
2530
2531 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2532 p_flags1 |= PF_W;
2533 if ((m->sections[j]->flags & SEC_CODE) != 0)
2534 {
2535 p_flags1 |= PF_X;
2536 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2537 p_flags1 |= PF_PPC_VLE;
2538 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2539 break;
2540 }
2541 p_flags |= p_flags1;
2542 }
2543 /* If we're splitting a segment which originally contained rw
2544 sections then those sections might now only be in one of the
2545 two parts. So always set p_flags if splitting, even if we
2546 are being called for objcopy with p_flags_valid set. */
2547 if (j != m->count || !m->p_flags_valid)
2548 {
2549 m->p_flags_valid = 1;
2550 m->p_flags = p_flags;
2551 }
2552 if (j == m->count)
2553 continue;
2554
2555 /* Sections 0..j-1 stay in this (current) segment,
2556 the remainder are put in a new segment.
2557 The scan resumes with the new segment. */
2558
2559 amt = sizeof (struct elf_segment_map);
2560 amt += (m->count - j - 1) * sizeof (asection *);
2561 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2562 if (n == NULL)
2563 return FALSE;
2564
2565 n->p_type = PT_LOAD;
2566 n->count = m->count - j;
2567 for (k = 0; k < n->count; ++k)
2568 n->sections[k] = m->sections[j + k];
2569 m->count = j;
2570 m->p_size_valid = 0;
2571 n->next = m->next;
2572 m->next = n;
2573 }
2574
2575 return TRUE;
2576 }
2577
2578 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2579 .PPC.EMB.sbss0 a normal section, and not a bss section so
2580 that the linker doesn't crater when trying to make more than
2581 2 sections. */
2582
2583 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2584 {
2585 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2586 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2587 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2588 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2589 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2590 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2591 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2592 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2593 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2594 { NULL, 0, 0, 0, 0 }
2595 };
2596
2597 /* This is what we want for new plt/got. */
2598 static struct bfd_elf_special_section ppc_alt_plt =
2599 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2600
2601 static const struct bfd_elf_special_section *
2602 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2603 {
2604 const struct bfd_elf_special_section *ssect;
2605
2606 /* See if this is one of the special sections. */
2607 if (sec->name == NULL)
2608 return NULL;
2609
2610 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2611 sec->use_rela_p);
2612 if (ssect != NULL)
2613 {
2614 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2615 ssect = &ppc_alt_plt;
2616 return ssect;
2617 }
2618
2619 return _bfd_elf_get_sec_type_attr (abfd, sec);
2620 }
2621 \f
2622 /* Very simple linked list structure for recording apuinfo values. */
2623 typedef struct apuinfo_list
2624 {
2625 struct apuinfo_list *next;
2626 unsigned long value;
2627 }
2628 apuinfo_list;
2629
2630 static apuinfo_list *head;
2631 static bfd_boolean apuinfo_set;
2632
2633 static void
2634 apuinfo_list_init (void)
2635 {
2636 head = NULL;
2637 apuinfo_set = FALSE;
2638 }
2639
2640 static void
2641 apuinfo_list_add (unsigned long value)
2642 {
2643 apuinfo_list *entry = head;
2644
2645 while (entry != NULL)
2646 {
2647 if (entry->value == value)
2648 return;
2649 entry = entry->next;
2650 }
2651
2652 entry = bfd_malloc (sizeof (* entry));
2653 if (entry == NULL)
2654 return;
2655
2656 entry->value = value;
2657 entry->next = head;
2658 head = entry;
2659 }
2660
2661 static unsigned
2662 apuinfo_list_length (void)
2663 {
2664 apuinfo_list *entry;
2665 unsigned long count;
2666
2667 for (entry = head, count = 0;
2668 entry;
2669 entry = entry->next)
2670 ++ count;
2671
2672 return count;
2673 }
2674
2675 static inline unsigned long
2676 apuinfo_list_element (unsigned long number)
2677 {
2678 apuinfo_list * entry;
2679
2680 for (entry = head;
2681 entry && number --;
2682 entry = entry->next)
2683 ;
2684
2685 return entry ? entry->value : 0;
2686 }
2687
2688 static void
2689 apuinfo_list_finish (void)
2690 {
2691 apuinfo_list *entry;
2692
2693 for (entry = head; entry;)
2694 {
2695 apuinfo_list *next = entry->next;
2696 free (entry);
2697 entry = next;
2698 }
2699
2700 head = NULL;
2701 }
2702
2703 /* Scan the input BFDs and create a linked list of
2704 the APUinfo values that will need to be emitted. */
2705
2706 static void
2707 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2708 {
2709 bfd *ibfd;
2710 asection *asec;
2711 char *buffer = NULL;
2712 bfd_size_type largest_input_size = 0;
2713 unsigned i;
2714 unsigned long length;
2715 const char *error_message = NULL;
2716
2717 if (link_info == NULL)
2718 return;
2719
2720 apuinfo_list_init ();
2721
2722 /* Read in the input sections contents. */
2723 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2724 {
2725 unsigned long datum;
2726
2727 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2728 if (asec == NULL)
2729 continue;
2730
2731 /* xgettext:c-format */
2732 error_message = _("corrupt %s section in %B");
2733 length = asec->size;
2734 if (length < 20)
2735 goto fail;
2736
2737 apuinfo_set = TRUE;
2738 if (largest_input_size < asec->size)
2739 {
2740 if (buffer)
2741 free (buffer);
2742 largest_input_size = asec->size;
2743 buffer = bfd_malloc (largest_input_size);
2744 if (!buffer)
2745 return;
2746 }
2747
2748 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2749 || (bfd_bread (buffer, length, ibfd) != length))
2750 {
2751 /* xgettext:c-format */
2752 error_message = _("unable to read in %s section from %B");
2753 goto fail;
2754 }
2755
2756 /* Verify the contents of the header. Note - we have to
2757 extract the values this way in order to allow for a
2758 host whose endian-ness is different from the target. */
2759 datum = bfd_get_32 (ibfd, buffer);
2760 if (datum != sizeof APUINFO_LABEL)
2761 goto fail;
2762
2763 datum = bfd_get_32 (ibfd, buffer + 8);
2764 if (datum != 0x2)
2765 goto fail;
2766
2767 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2768 goto fail;
2769
2770 /* Get the number of bytes used for apuinfo entries. */
2771 datum = bfd_get_32 (ibfd, buffer + 4);
2772 if (datum + 20 != length)
2773 goto fail;
2774
2775 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2776 for (i = 0; i < datum; i += 4)
2777 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2778 }
2779
2780 error_message = NULL;
2781
2782 if (apuinfo_set)
2783 {
2784 /* Compute the size of the output section. */
2785 unsigned num_entries = apuinfo_list_length ();
2786
2787 /* Set the output section size, if it exists. */
2788 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2789
2790 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2791 {
2792 ibfd = abfd;
2793 /* xgettext:c-format */
2794 error_message = _("warning: unable to set size of %s section in %B");
2795 }
2796 }
2797
2798 fail:
2799 if (buffer)
2800 free (buffer);
2801
2802 if (error_message)
2803 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
2804 }
2805
2806 /* Prevent the output section from accumulating the input sections'
2807 contents. We have already stored this in our linked list structure. */
2808
2809 static bfd_boolean
2810 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2811 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2812 asection *asec,
2813 bfd_byte *contents ATTRIBUTE_UNUSED)
2814 {
2815 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2816 }
2817
2818 /* Finally we can generate the output section. */
2819
2820 static void
2821 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2822 {
2823 bfd_byte *buffer;
2824 asection *asec;
2825 unsigned i;
2826 unsigned num_entries;
2827 bfd_size_type length;
2828
2829 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2830 if (asec == NULL)
2831 return;
2832
2833 if (!apuinfo_set)
2834 return;
2835
2836 length = asec->size;
2837 if (length < 20)
2838 return;
2839
2840 buffer = bfd_malloc (length);
2841 if (buffer == NULL)
2842 {
2843 _bfd_error_handler
2844 (_("failed to allocate space for new APUinfo section."));
2845 return;
2846 }
2847
2848 /* Create the apuinfo header. */
2849 num_entries = apuinfo_list_length ();
2850 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2851 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2852 bfd_put_32 (abfd, 0x2, buffer + 8);
2853 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2854
2855 length = 20;
2856 for (i = 0; i < num_entries; i++)
2857 {
2858 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2859 length += 4;
2860 }
2861
2862 if (length != asec->size)
2863 _bfd_error_handler (_("failed to compute new APUinfo section."));
2864
2865 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2866 _bfd_error_handler (_("failed to install new APUinfo section."));
2867
2868 free (buffer);
2869
2870 apuinfo_list_finish ();
2871 }
2872 \f
2873 static bfd_boolean
2874 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2875 {
2876 bfd_byte buf[GLINK_ENTRY_SIZE];
2877
2878 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2879 return FALSE;
2880
2881 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2882 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2883 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2884 && bfd_get_32 (abfd, buf + 12) == BCTR);
2885 }
2886
2887 static bfd_boolean
2888 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2889 {
2890 bfd_vma vma = *(bfd_vma *) ptr;
2891 return ((section->flags & SEC_ALLOC) != 0
2892 && section->vma <= vma
2893 && vma < section->vma + section->size);
2894 }
2895
2896 static long
2897 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2898 long dynsymcount, asymbol **dynsyms,
2899 asymbol **ret)
2900 {
2901 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2902 asection *plt, *relplt, *dynamic, *glink;
2903 bfd_vma glink_vma = 0;
2904 bfd_vma resolv_vma = 0;
2905 bfd_vma stub_vma;
2906 asymbol *s;
2907 arelent *p;
2908 long count, i;
2909 size_t size;
2910 char *names;
2911 bfd_byte buf[4];
2912
2913 *ret = NULL;
2914
2915 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2916 return 0;
2917
2918 if (dynsymcount <= 0)
2919 return 0;
2920
2921 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2922 if (relplt == NULL)
2923 return 0;
2924
2925 plt = bfd_get_section_by_name (abfd, ".plt");
2926 if (plt == NULL)
2927 return 0;
2928
2929 /* Call common code to handle old-style executable PLTs. */
2930 if (elf_section_flags (plt) & SHF_EXECINSTR)
2931 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2932 dynsymcount, dynsyms, ret);
2933
2934 /* If this object was prelinked, the prelinker stored the address
2935 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2936 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2937 if (dynamic != NULL)
2938 {
2939 bfd_byte *dynbuf, *extdyn, *extdynend;
2940 size_t extdynsize;
2941 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2942
2943 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2944 return -1;
2945
2946 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2947 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2948
2949 extdyn = dynbuf;
2950 extdynend = extdyn + dynamic->size;
2951 for (; extdyn < extdynend; extdyn += extdynsize)
2952 {
2953 Elf_Internal_Dyn dyn;
2954 (*swap_dyn_in) (abfd, extdyn, &dyn);
2955
2956 if (dyn.d_tag == DT_NULL)
2957 break;
2958
2959 if (dyn.d_tag == DT_PPC_GOT)
2960 {
2961 unsigned int g_o_t = dyn.d_un.d_val;
2962 asection *got = bfd_get_section_by_name (abfd, ".got");
2963 if (got != NULL
2964 && bfd_get_section_contents (abfd, got, buf,
2965 g_o_t - got->vma + 4, 4))
2966 glink_vma = bfd_get_32 (abfd, buf);
2967 break;
2968 }
2969 }
2970 free (dynbuf);
2971 }
2972
2973 /* Otherwise we read the first plt entry. */
2974 if (glink_vma == 0)
2975 {
2976 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2977 glink_vma = bfd_get_32 (abfd, buf);
2978 }
2979
2980 if (glink_vma == 0)
2981 return 0;
2982
2983 /* The .glink section usually does not survive the final
2984 link; search for the section (usually .text) where the
2985 glink stubs now reside. */
2986 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2987 if (glink == NULL)
2988 return 0;
2989
2990 /* Determine glink PLT resolver by reading the relative branch
2991 from the first glink stub. */
2992 if (bfd_get_section_contents (abfd, glink, buf,
2993 glink_vma - glink->vma, 4))
2994 {
2995 unsigned int insn = bfd_get_32 (abfd, buf);
2996
2997 /* The first glink stub may either branch to the resolver ... */
2998 insn ^= B;
2999 if ((insn & ~0x3fffffc) == 0)
3000 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3001
3002 /* ... or fall through a bunch of NOPs. */
3003 else if ((insn ^ B ^ NOP) == 0)
3004 for (i = 4;
3005 bfd_get_section_contents (abfd, glink, buf,
3006 glink_vma - glink->vma + i, 4);
3007 i += 4)
3008 if (bfd_get_32 (abfd, buf) != NOP)
3009 {
3010 resolv_vma = glink_vma + i;
3011 break;
3012 }
3013 }
3014
3015 count = relplt->size / sizeof (Elf32_External_Rela);
3016 /* If the stubs are those for -shared/-pie then we might have
3017 multiple stubs for each plt entry. If that is the case then
3018 there is no way to associate stubs with their plt entries short
3019 of figuring out the GOT pointer value used in the stub. */
3020 if (!is_nonpic_glink_stub (abfd, glink,
3021 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3022 return 0;
3023
3024 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3025 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3026 return -1;
3027
3028 size = count * sizeof (asymbol);
3029 p = relplt->relocation;
3030 for (i = 0; i < count; i++, p++)
3031 {
3032 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3033 if (p->addend != 0)
3034 size += sizeof ("+0x") - 1 + 8;
3035 }
3036
3037 size += sizeof (asymbol) + sizeof ("__glink");
3038
3039 if (resolv_vma)
3040 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3041
3042 s = *ret = bfd_malloc (size);
3043 if (s == NULL)
3044 return -1;
3045
3046 stub_vma = glink_vma;
3047 names = (char *) (s + count + 1 + (resolv_vma != 0));
3048 p = relplt->relocation + count - 1;
3049 for (i = 0; i < count; i++)
3050 {
3051 size_t len;
3052
3053 *s = **p->sym_ptr_ptr;
3054 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3055 we are defining a symbol, ensure one of them is set. */
3056 if ((s->flags & BSF_LOCAL) == 0)
3057 s->flags |= BSF_GLOBAL;
3058 s->flags |= BSF_SYNTHETIC;
3059 s->section = glink;
3060 stub_vma -= 16;
3061 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3062 stub_vma -= 32;
3063 s->value = stub_vma - glink->vma;
3064 s->name = names;
3065 s->udata.p = NULL;
3066 len = strlen ((*p->sym_ptr_ptr)->name);
3067 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3068 names += len;
3069 if (p->addend != 0)
3070 {
3071 memcpy (names, "+0x", sizeof ("+0x") - 1);
3072 names += sizeof ("+0x") - 1;
3073 bfd_sprintf_vma (abfd, names, p->addend);
3074 names += strlen (names);
3075 }
3076 memcpy (names, "@plt", sizeof ("@plt"));
3077 names += sizeof ("@plt");
3078 ++s;
3079 --p;
3080 }
3081
3082 /* Add a symbol at the start of the glink branch table. */
3083 memset (s, 0, sizeof *s);
3084 s->the_bfd = abfd;
3085 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3086 s->section = glink;
3087 s->value = glink_vma - glink->vma;
3088 s->name = names;
3089 memcpy (names, "__glink", sizeof ("__glink"));
3090 names += sizeof ("__glink");
3091 s++;
3092 count++;
3093
3094 if (resolv_vma)
3095 {
3096 /* Add a symbol for the glink PLT resolver. */
3097 memset (s, 0, sizeof *s);
3098 s->the_bfd = abfd;
3099 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3100 s->section = glink;
3101 s->value = resolv_vma - glink->vma;
3102 s->name = names;
3103 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3104 names += sizeof ("__glink_PLTresolve");
3105 s++;
3106 count++;
3107 }
3108
3109 return count;
3110 }
3111 \f
3112 /* The following functions are specific to the ELF linker, while
3113 functions above are used generally. They appear in this file more
3114 or less in the order in which they are called. eg.
3115 ppc_elf_check_relocs is called early in the link process,
3116 ppc_elf_finish_dynamic_sections is one of the last functions
3117 called. */
3118
3119 /* Track PLT entries needed for a given symbol. We might need more
3120 than one glink entry per symbol when generating a pic binary. */
3121 struct plt_entry
3122 {
3123 struct plt_entry *next;
3124
3125 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3126 This field stores the offset into .got2 used to initialise the
3127 GOT pointer reg. It will always be at least 32768. (Current
3128 gcc always uses an offset of 32768, but ld -r will pack .got2
3129 sections together resulting in larger offsets). */
3130 bfd_vma addend;
3131
3132 /* The .got2 section. */
3133 asection *sec;
3134
3135 /* PLT refcount or offset. */
3136 union
3137 {
3138 bfd_signed_vma refcount;
3139 bfd_vma offset;
3140 } plt;
3141
3142 /* .glink stub offset. */
3143 bfd_vma glink_offset;
3144 };
3145
3146 /* Of those relocs that might be copied as dynamic relocs, this
3147 function selects those that must be copied when linking a shared
3148 library or PIE, even when the symbol is local. */
3149
3150 static int
3151 must_be_dyn_reloc (struct bfd_link_info *info,
3152 enum elf_ppc_reloc_type r_type)
3153 {
3154 switch (r_type)
3155 {
3156 default:
3157 /* Only relative relocs can be resolved when the object load
3158 address isn't fixed. DTPREL32 is excluded because the
3159 dynamic linker needs to differentiate global dynamic from
3160 local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
3161 return 1;
3162
3163 case R_PPC_REL24:
3164 case R_PPC_REL14:
3165 case R_PPC_REL14_BRTAKEN:
3166 case R_PPC_REL14_BRNTAKEN:
3167 case R_PPC_REL32:
3168 return 0;
3169
3170 case R_PPC_TPREL32:
3171 case R_PPC_TPREL16:
3172 case R_PPC_TPREL16_LO:
3173 case R_PPC_TPREL16_HI:
3174 case R_PPC_TPREL16_HA:
3175 /* These relocations are relative but in a shared library the
3176 linker doesn't know the thread pointer base. */
3177 return bfd_link_dll (info);
3178 }
3179 }
3180
3181 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3182 copying dynamic variables from a shared lib into an app's dynbss
3183 section, and instead use a dynamic relocation to point into the
3184 shared lib. */
3185 #define ELIMINATE_COPY_RELOCS 1
3186
3187 /* Used to track dynamic relocations for local symbols. */
3188 struct ppc_dyn_relocs
3189 {
3190 struct ppc_dyn_relocs *next;
3191
3192 /* The input section of the reloc. */
3193 asection *sec;
3194
3195 /* Total number of relocs copied for the input section. */
3196 unsigned int count : 31;
3197
3198 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3199 unsigned int ifunc : 1;
3200 };
3201
3202 /* PPC ELF linker hash entry. */
3203
3204 struct ppc_elf_link_hash_entry
3205 {
3206 struct elf_link_hash_entry elf;
3207
3208 /* If this symbol is used in the linker created sections, the processor
3209 specific backend uses this field to map the field into the offset
3210 from the beginning of the section. */
3211 elf_linker_section_pointers_t *linker_section_pointer;
3212
3213 /* Track dynamic relocs copied for this symbol. */
3214 struct elf_dyn_relocs *dyn_relocs;
3215
3216 /* Contexts in which symbol is used in the GOT (or TOC).
3217 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3218 corresponding relocs are encountered during check_relocs.
3219 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3220 indicate the corresponding GOT entry type is not needed. */
3221 #define TLS_GD 1 /* GD reloc. */
3222 #define TLS_LD 2 /* LD reloc. */
3223 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3224 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3225 #define TLS_TLS 16 /* Any TLS reloc. */
3226 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3227 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3228 char tls_mask;
3229
3230 /* Nonzero if we have seen a small data relocation referring to this
3231 symbol. */
3232 unsigned char has_sda_refs : 1;
3233
3234 /* Flag use of given relocations. */
3235 unsigned char has_addr16_ha : 1;
3236 unsigned char has_addr16_lo : 1;
3237 };
3238
3239 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3240
3241 /* PPC ELF linker hash table. */
3242
3243 struct ppc_elf_link_hash_table
3244 {
3245 struct elf_link_hash_table elf;
3246
3247 /* Various options passed from the linker. */
3248 struct ppc_elf_params *params;
3249
3250 /* Short-cuts to get to dynamic linker sections. */
3251 asection *glink;
3252 asection *dynsbss;
3253 asection *relsbss;
3254 elf_linker_section_t sdata[2];
3255 asection *sbss;
3256 asection *glink_eh_frame;
3257
3258 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3259 asection *srelplt2;
3260
3261 /* Shortcut to __tls_get_addr. */
3262 struct elf_link_hash_entry *tls_get_addr;
3263
3264 /* The bfd that forced an old-style PLT. */
3265 bfd *old_bfd;
3266
3267 /* TLS local dynamic got entry handling. */
3268 union {
3269 bfd_signed_vma refcount;
3270 bfd_vma offset;
3271 } tlsld_got;
3272
3273 /* Offset of branch table to PltResolve function in glink. */
3274 bfd_vma glink_pltresolve;
3275
3276 /* Size of reserved GOT entries. */
3277 unsigned int got_header_size;
3278 /* Non-zero if allocating the header left a gap. */
3279 unsigned int got_gap;
3280
3281 /* The type of PLT we have chosen to use. */
3282 enum ppc_elf_plt_type plt_type;
3283
3284 /* True if the target system is VxWorks. */
3285 unsigned int is_vxworks:1;
3286
3287 /* Whether there exist local gnu indirect function resolvers,
3288 referenced by dynamic relocations. */
3289 unsigned int local_ifunc_resolver:1;
3290 unsigned int maybe_local_ifunc_resolver:1;
3291
3292 /* Set if tls optimization is enabled. */
3293 unsigned int do_tls_opt:1;
3294
3295 /* The size of PLT entries. */
3296 int plt_entry_size;
3297 /* The distance between adjacent PLT slots. */
3298 int plt_slot_size;
3299 /* The size of the first PLT entry. */
3300 int plt_initial_entry_size;
3301
3302 /* Small local sym cache. */
3303 struct sym_cache sym_cache;
3304 };
3305
3306 /* Rename some of the generic section flags to better document how they
3307 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3308
3309 /* Nonzero if this section has TLS related relocations. */
3310 #define has_tls_reloc sec_flg0
3311
3312 /* Nonzero if this section has a call to __tls_get_addr. */
3313 #define has_tls_get_addr_call sec_flg1
3314
3315 /* Get the PPC ELF linker hash table from a link_info structure. */
3316
3317 #define ppc_elf_hash_table(p) \
3318 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3319 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3320
3321 /* Create an entry in a PPC ELF linker hash table. */
3322
3323 static struct bfd_hash_entry *
3324 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3325 struct bfd_hash_table *table,
3326 const char *string)
3327 {
3328 /* Allocate the structure if it has not already been allocated by a
3329 subclass. */
3330 if (entry == NULL)
3331 {
3332 entry = bfd_hash_allocate (table,
3333 sizeof (struct ppc_elf_link_hash_entry));
3334 if (entry == NULL)
3335 return entry;
3336 }
3337
3338 /* Call the allocation method of the superclass. */
3339 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3340 if (entry != NULL)
3341 {
3342 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3343 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3344 ppc_elf_hash_entry (entry)->tls_mask = 0;
3345 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3346 }
3347
3348 return entry;
3349 }
3350
3351 /* Create a PPC ELF linker hash table. */
3352
3353 static struct bfd_link_hash_table *
3354 ppc_elf_link_hash_table_create (bfd *abfd)
3355 {
3356 struct ppc_elf_link_hash_table *ret;
3357 static struct ppc_elf_params default_params
3358 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 };
3359
3360 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3361 if (ret == NULL)
3362 return NULL;
3363
3364 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3365 ppc_elf_link_hash_newfunc,
3366 sizeof (struct ppc_elf_link_hash_entry),
3367 PPC32_ELF_DATA))
3368 {
3369 free (ret);
3370 return NULL;
3371 }
3372
3373 ret->elf.init_plt_refcount.refcount = 0;
3374 ret->elf.init_plt_refcount.glist = NULL;
3375 ret->elf.init_plt_offset.offset = 0;
3376 ret->elf.init_plt_offset.glist = NULL;
3377
3378 ret->params = &default_params;
3379
3380 ret->sdata[0].name = ".sdata";
3381 ret->sdata[0].sym_name = "_SDA_BASE_";
3382 ret->sdata[0].bss_name = ".sbss";
3383
3384 ret->sdata[1].name = ".sdata2";
3385 ret->sdata[1].sym_name = "_SDA2_BASE_";
3386 ret->sdata[1].bss_name = ".sbss2";
3387
3388 ret->plt_entry_size = 12;
3389 ret->plt_slot_size = 8;
3390 ret->plt_initial_entry_size = 72;
3391
3392 return &ret->elf.root;
3393 }
3394
3395 /* Hook linker params into hash table. */
3396
3397 void
3398 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3399 {
3400 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3401
3402 if (htab)
3403 htab->params = params;
3404 params->pagesize_p2 = bfd_log2 (params->pagesize);
3405 }
3406
3407 /* Create .got and the related sections. */
3408
3409 static bfd_boolean
3410 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3411 {
3412 struct ppc_elf_link_hash_table *htab;
3413
3414 if (!_bfd_elf_create_got_section (abfd, info))
3415 return FALSE;
3416
3417 htab = ppc_elf_hash_table (info);
3418 if (!htab->is_vxworks)
3419 {
3420 /* The powerpc .got has a blrl instruction in it. Mark it
3421 executable. */
3422 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3423 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3424 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3425 return FALSE;
3426 }
3427
3428 return TRUE;
3429 }
3430
3431 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3432 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3433 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3434
3435 static bfd_boolean
3436 ppc_elf_create_linker_section (bfd *abfd,
3437 struct bfd_link_info *info,
3438 flagword flags,
3439 elf_linker_section_t *lsect)
3440 {
3441 asection *s;
3442
3443 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3444 | SEC_LINKER_CREATED);
3445
3446 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3447 if (s == NULL)
3448 return FALSE;
3449 lsect->section = s;
3450
3451 /* Define the sym on the first section of this name. */
3452 s = bfd_get_section_by_name (abfd, lsect->name);
3453
3454 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3455 if (lsect->sym == NULL)
3456 return FALSE;
3457 lsect->sym->root.u.def.value = 0x8000;
3458 return TRUE;
3459 }
3460
3461 static bfd_boolean
3462 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3463 {
3464 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3465 asection *s;
3466 flagword flags;
3467
3468 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3469 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3470 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3471 htab->glink = s;
3472 if (s == NULL
3473 || !bfd_set_section_alignment (abfd, s,
3474 htab->params->ppc476_workaround ? 6 : 4))
3475 return FALSE;
3476
3477 if (!info->no_ld_generated_unwind_info)
3478 {
3479 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3480 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3481 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3482 htab->glink_eh_frame = s;
3483 if (s == NULL
3484 || !bfd_set_section_alignment (abfd, s, 2))
3485 return FALSE;
3486 }
3487
3488 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3489 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3490 htab->elf.iplt = s;
3491 if (s == NULL
3492 || !bfd_set_section_alignment (abfd, s, 4))
3493 return FALSE;
3494
3495 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3496 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3497 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3498 htab->elf.irelplt = s;
3499 if (s == NULL
3500 || ! bfd_set_section_alignment (abfd, s, 2))
3501 return FALSE;
3502
3503 if (!ppc_elf_create_linker_section (abfd, info, 0,
3504 &htab->sdata[0]))
3505 return FALSE;
3506
3507 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3508 &htab->sdata[1]))
3509 return FALSE;
3510
3511 return TRUE;
3512 }
3513
3514 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3515 to output sections (just like _bfd_elf_create_dynamic_sections has
3516 to create .dynbss and .rela.bss). */
3517
3518 static bfd_boolean
3519 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3520 {
3521 struct ppc_elf_link_hash_table *htab;
3522 asection *s;
3523 flagword flags;
3524
3525 htab = ppc_elf_hash_table (info);
3526
3527 if (htab->elf.sgot == NULL
3528 && !ppc_elf_create_got (abfd, info))
3529 return FALSE;
3530
3531 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3532 return FALSE;
3533
3534 if (htab->glink == NULL
3535 && !ppc_elf_create_glink (abfd, info))
3536 return FALSE;
3537
3538 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3539 SEC_ALLOC | SEC_LINKER_CREATED);
3540 htab->dynsbss = s;
3541 if (s == NULL)
3542 return FALSE;
3543
3544 if (! bfd_link_pic (info))
3545 {
3546 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3547 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3548 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3549 htab->relsbss = s;
3550 if (s == NULL
3551 || ! bfd_set_section_alignment (abfd, s, 2))
3552 return FALSE;
3553 }
3554
3555 if (htab->is_vxworks
3556 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3557 return FALSE;
3558
3559 s = htab->elf.splt;
3560 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3561 if (htab->plt_type == PLT_VXWORKS)
3562 /* The VxWorks PLT is a loaded section with contents. */
3563 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3564 return bfd_set_section_flags (abfd, s, flags);
3565 }
3566
3567 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3568
3569 static void
3570 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3571 struct elf_link_hash_entry *dir,
3572 struct elf_link_hash_entry *ind)
3573 {
3574 struct ppc_elf_link_hash_entry *edir, *eind;
3575
3576 edir = (struct ppc_elf_link_hash_entry *) dir;
3577 eind = (struct ppc_elf_link_hash_entry *) ind;
3578
3579 edir->tls_mask |= eind->tls_mask;
3580 edir->has_sda_refs |= eind->has_sda_refs;
3581
3582 /* If called to transfer flags for a weakdef during processing
3583 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3584 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3585 if (!(ELIMINATE_COPY_RELOCS
3586 && eind->elf.root.type != bfd_link_hash_indirect
3587 && edir->elf.dynamic_adjusted))
3588 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3589
3590 if (edir->elf.versioned != versioned_hidden)
3591 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3592 edir->elf.ref_regular |= eind->elf.ref_regular;
3593 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3594 edir->elf.needs_plt |= eind->elf.needs_plt;
3595 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3596
3597 if (eind->dyn_relocs != NULL)
3598 {
3599 if (edir->dyn_relocs != NULL)
3600 {
3601 struct elf_dyn_relocs **pp;
3602 struct elf_dyn_relocs *p;
3603
3604 /* Add reloc counts against the indirect sym to the direct sym
3605 list. Merge any entries against the same section. */
3606 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3607 {
3608 struct elf_dyn_relocs *q;
3609
3610 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3611 if (q->sec == p->sec)
3612 {
3613 q->pc_count += p->pc_count;
3614 q->count += p->count;
3615 *pp = p->next;
3616 break;
3617 }
3618 if (q == NULL)
3619 pp = &p->next;
3620 }
3621 *pp = edir->dyn_relocs;
3622 }
3623
3624 edir->dyn_relocs = eind->dyn_relocs;
3625 eind->dyn_relocs = NULL;
3626 }
3627
3628 /* If we were called to copy over info for a weak sym, that's all.
3629 You might think dyn_relocs need not be copied over; After all,
3630 both syms will be dynamic or both non-dynamic so we're just
3631 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3632 code in ppc_elf_adjust_dynamic_symbol needs to check for
3633 dyn_relocs in read-only sections, and it does so on what is the
3634 DIR sym here. */
3635 if (eind->elf.root.type != bfd_link_hash_indirect)
3636 return;
3637
3638 /* Copy over the GOT refcount entries that we may have already seen to
3639 the symbol which just became indirect. */
3640 edir->elf.got.refcount += eind->elf.got.refcount;
3641 eind->elf.got.refcount = 0;
3642
3643 /* And plt entries. */
3644 if (eind->elf.plt.plist != NULL)
3645 {
3646 if (edir->elf.plt.plist != NULL)
3647 {
3648 struct plt_entry **entp;
3649 struct plt_entry *ent;
3650
3651 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3652 {
3653 struct plt_entry *dent;
3654
3655 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3656 if (dent->sec == ent->sec && dent->addend == ent->addend)
3657 {
3658 dent->plt.refcount += ent->plt.refcount;
3659 *entp = ent->next;
3660 break;
3661 }
3662 if (dent == NULL)
3663 entp = &ent->next;
3664 }
3665 *entp = edir->elf.plt.plist;
3666 }
3667
3668 edir->elf.plt.plist = eind->elf.plt.plist;
3669 eind->elf.plt.plist = NULL;
3670 }
3671
3672 if (eind->elf.dynindx != -1)
3673 {
3674 if (edir->elf.dynindx != -1)
3675 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3676 edir->elf.dynstr_index);
3677 edir->elf.dynindx = eind->elf.dynindx;
3678 edir->elf.dynstr_index = eind->elf.dynstr_index;
3679 eind->elf.dynindx = -1;
3680 eind->elf.dynstr_index = 0;
3681 }
3682 }
3683
3684 /* Hook called by the linker routine which adds symbols from an object
3685 file. We use it to put .comm items in .sbss, and not .bss. */
3686
3687 static bfd_boolean
3688 ppc_elf_add_symbol_hook (bfd *abfd,
3689 struct bfd_link_info *info,
3690 Elf_Internal_Sym *sym,
3691 const char **namep ATTRIBUTE_UNUSED,
3692 flagword *flagsp ATTRIBUTE_UNUSED,
3693 asection **secp,
3694 bfd_vma *valp)
3695 {
3696 if (sym->st_shndx == SHN_COMMON
3697 && !bfd_link_relocatable (info)
3698 && is_ppc_elf (info->output_bfd)
3699 && sym->st_size <= elf_gp_size (abfd))
3700 {
3701 /* Common symbols less than or equal to -G nn bytes are automatically
3702 put into .sbss. */
3703 struct ppc_elf_link_hash_table *htab;
3704
3705 htab = ppc_elf_hash_table (info);
3706 if (htab->sbss == NULL)
3707 {
3708 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3709
3710 if (!htab->elf.dynobj)
3711 htab->elf.dynobj = abfd;
3712
3713 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3714 ".sbss",
3715 flags);
3716 if (htab->sbss == NULL)
3717 return FALSE;
3718 }
3719
3720 *secp = htab->sbss;
3721 *valp = sym->st_size;
3722 }
3723
3724 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3725 && (abfd->flags & DYNAMIC) == 0
3726 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3727 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3728
3729 return TRUE;
3730 }
3731 \f
3732 /* Find a linker generated pointer with a given addend and type. */
3733
3734 static elf_linker_section_pointers_t *
3735 elf_find_pointer_linker_section
3736 (elf_linker_section_pointers_t *linker_pointers,
3737 bfd_vma addend,
3738 elf_linker_section_t *lsect)
3739 {
3740 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3741 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3742 return linker_pointers;
3743
3744 return NULL;
3745 }
3746
3747 /* Allocate a pointer to live in a linker created section. */
3748
3749 static bfd_boolean
3750 elf_allocate_pointer_linker_section (bfd *abfd,
3751 elf_linker_section_t *lsect,
3752 struct elf_link_hash_entry *h,
3753 const Elf_Internal_Rela *rel)
3754 {
3755 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3756 elf_linker_section_pointers_t *linker_section_ptr;
3757 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3758 bfd_size_type amt;
3759
3760 BFD_ASSERT (lsect != NULL);
3761
3762 /* Is this a global symbol? */
3763 if (h != NULL)
3764 {
3765 struct ppc_elf_link_hash_entry *eh;
3766
3767 /* Has this symbol already been allocated? If so, our work is done. */
3768 eh = (struct ppc_elf_link_hash_entry *) h;
3769 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3770 rel->r_addend,
3771 lsect))
3772 return TRUE;
3773
3774 ptr_linker_section_ptr = &eh->linker_section_pointer;
3775 }
3776 else
3777 {
3778 BFD_ASSERT (is_ppc_elf (abfd));
3779
3780 /* Allocation of a pointer to a local symbol. */
3781 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3782
3783 /* Allocate a table to hold the local symbols if first time. */
3784 if (!ptr)
3785 {
3786 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3787
3788 amt = num_symbols;
3789 amt *= sizeof (elf_linker_section_pointers_t *);
3790 ptr = bfd_zalloc (abfd, amt);
3791
3792 if (!ptr)
3793 return FALSE;
3794
3795 elf_local_ptr_offsets (abfd) = ptr;
3796 }
3797
3798 /* Has this symbol already been allocated? If so, our work is done. */
3799 if (elf_find_pointer_linker_section (ptr[r_symndx],
3800 rel->r_addend,
3801 lsect))
3802 return TRUE;
3803
3804 ptr_linker_section_ptr = &ptr[r_symndx];
3805 }
3806
3807 /* Allocate space for a pointer in the linker section, and allocate
3808 a new pointer record from internal memory. */
3809 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3810 amt = sizeof (elf_linker_section_pointers_t);
3811 linker_section_ptr = bfd_alloc (abfd, amt);
3812
3813 if (!linker_section_ptr)
3814 return FALSE;
3815
3816 linker_section_ptr->next = *ptr_linker_section_ptr;
3817 linker_section_ptr->addend = rel->r_addend;
3818 linker_section_ptr->lsect = lsect;
3819 *ptr_linker_section_ptr = linker_section_ptr;
3820
3821 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3822 return FALSE;
3823 linker_section_ptr->offset = lsect->section->size;
3824 lsect->section->size += 4;
3825
3826 #ifdef DEBUG
3827 fprintf (stderr,
3828 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3829 lsect->name, (long) linker_section_ptr->offset,
3830 (long) lsect->section->size);
3831 #endif
3832
3833 return TRUE;
3834 }
3835
3836 static struct plt_entry **
3837 update_local_sym_info (bfd *abfd,
3838 Elf_Internal_Shdr *symtab_hdr,
3839 unsigned long r_symndx,
3840 int tls_type)
3841 {
3842 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3843 struct plt_entry **local_plt;
3844 char *local_got_tls_masks;
3845
3846 if (local_got_refcounts == NULL)
3847 {
3848 bfd_size_type size = symtab_hdr->sh_info;
3849
3850 size *= (sizeof (*local_got_refcounts)
3851 + sizeof (*local_plt)
3852 + sizeof (*local_got_tls_masks));
3853 local_got_refcounts = bfd_zalloc (abfd, size);
3854 if (local_got_refcounts == NULL)
3855 return NULL;
3856 elf_local_got_refcounts (abfd) = local_got_refcounts;
3857 }
3858
3859 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3860 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3861 local_got_tls_masks[r_symndx] |= tls_type;
3862 if (tls_type != PLT_IFUNC)
3863 local_got_refcounts[r_symndx] += 1;
3864 return local_plt + r_symndx;
3865 }
3866
3867 static bfd_boolean
3868 update_plt_info (bfd *abfd, struct plt_entry **plist,
3869 asection *sec, bfd_vma addend)
3870 {
3871 struct plt_entry *ent;
3872
3873 if (addend < 32768)
3874 sec = NULL;
3875 for (ent = *plist; ent != NULL; ent = ent->next)
3876 if (ent->sec == sec && ent->addend == addend)
3877 break;
3878 if (ent == NULL)
3879 {
3880 bfd_size_type amt = sizeof (*ent);
3881 ent = bfd_alloc (abfd, amt);
3882 if (ent == NULL)
3883 return FALSE;
3884 ent->next = *plist;
3885 ent->sec = sec;
3886 ent->addend = addend;
3887 ent->plt.refcount = 0;
3888 *plist = ent;
3889 }
3890 ent->plt.refcount += 1;
3891 return TRUE;
3892 }
3893
3894 static struct plt_entry *
3895 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3896 {
3897 struct plt_entry *ent;
3898
3899 if (addend < 32768)
3900 sec = NULL;
3901 for (ent = *plist; ent != NULL; ent = ent->next)
3902 if (ent->sec == sec && ent->addend == addend)
3903 break;
3904 return ent;
3905 }
3906
3907 static bfd_boolean
3908 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3909 {
3910 return (r_type == R_PPC_PLTREL24
3911 || r_type == R_PPC_LOCAL24PC
3912 || r_type == R_PPC_REL24
3913 || r_type == R_PPC_REL14
3914 || r_type == R_PPC_REL14_BRTAKEN
3915 || r_type == R_PPC_REL14_BRNTAKEN
3916 || r_type == R_PPC_ADDR24
3917 || r_type == R_PPC_ADDR14
3918 || r_type == R_PPC_ADDR14_BRTAKEN
3919 || r_type == R_PPC_ADDR14_BRNTAKEN
3920 || r_type == R_PPC_VLE_REL24);
3921 }
3922
3923 static void
3924 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3925 {
3926 _bfd_error_handler
3927 /* xgettext:c-format */
3928 (_("%B: relocation %s cannot be used when making a shared object"),
3929 abfd,
3930 ppc_elf_howto_table[r_type]->name);
3931 bfd_set_error (bfd_error_bad_value);
3932 }
3933
3934 /* Look through the relocs for a section during the first phase, and
3935 allocate space in the global offset table or procedure linkage
3936 table. */
3937
3938 static bfd_boolean
3939 ppc_elf_check_relocs (bfd *abfd,
3940 struct bfd_link_info *info,
3941 asection *sec,
3942 const Elf_Internal_Rela *relocs)
3943 {
3944 struct ppc_elf_link_hash_table *htab;
3945 Elf_Internal_Shdr *symtab_hdr;
3946 struct elf_link_hash_entry **sym_hashes;
3947 const Elf_Internal_Rela *rel;
3948 const Elf_Internal_Rela *rel_end;
3949 asection *got2, *sreloc;
3950 struct elf_link_hash_entry *tga;
3951
3952 if (bfd_link_relocatable (info))
3953 return TRUE;
3954
3955 /* Don't do anything special with non-loaded, non-alloced sections.
3956 In particular, any relocs in such sections should not affect GOT
3957 and PLT reference counting (ie. we don't allow them to create GOT
3958 or PLT entries), there's no possibility or desire to optimize TLS
3959 relocs, and there's not much point in propagating relocs to shared
3960 libs that the dynamic linker won't relocate. */
3961 if ((sec->flags & SEC_ALLOC) == 0)
3962 return TRUE;
3963
3964 #ifdef DEBUG
3965 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3966 sec, abfd);
3967 #endif
3968
3969 BFD_ASSERT (is_ppc_elf (abfd));
3970
3971 /* Initialize howto table if not already done. */
3972 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3973 ppc_elf_howto_init ();
3974
3975 htab = ppc_elf_hash_table (info);
3976 if (htab->glink == NULL)
3977 {
3978 if (htab->elf.dynobj == NULL)
3979 htab->elf.dynobj = abfd;
3980 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3981 return FALSE;
3982 }
3983 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3984 FALSE, FALSE, TRUE);
3985 symtab_hdr = &elf_symtab_hdr (abfd);
3986 sym_hashes = elf_sym_hashes (abfd);
3987 got2 = bfd_get_section_by_name (abfd, ".got2");
3988 sreloc = NULL;
3989
3990 rel_end = relocs + sec->reloc_count;
3991 for (rel = relocs; rel < rel_end; rel++)
3992 {
3993 unsigned long r_symndx;
3994 enum elf_ppc_reloc_type r_type;
3995 struct elf_link_hash_entry *h;
3996 int tls_type;
3997 struct plt_entry **ifunc;
3998
3999 r_symndx = ELF32_R_SYM (rel->r_info);
4000 if (r_symndx < symtab_hdr->sh_info)
4001 h = NULL;
4002 else
4003 {
4004 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4005 while (h->root.type == bfd_link_hash_indirect
4006 || h->root.type == bfd_link_hash_warning)
4007 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4008
4009 /* PR15323, ref flags aren't set for references in the same
4010 object. */
4011 h->root.non_ir_ref_regular = 1;
4012 }
4013
4014 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4015 This shows up in particular in an R_PPC_ADDR32 in the eabi
4016 startup code. */
4017 if (h != NULL
4018 && htab->elf.sgot == NULL
4019 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4020 {
4021 if (htab->elf.dynobj == NULL)
4022 htab->elf.dynobj = abfd;
4023 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4024 return FALSE;
4025 BFD_ASSERT (h == htab->elf.hgot);
4026 }
4027
4028 tls_type = 0;
4029 r_type = ELF32_R_TYPE (rel->r_info);
4030 ifunc = NULL;
4031 if (h == NULL && !htab->is_vxworks)
4032 {
4033 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4034 abfd, r_symndx);
4035 if (isym == NULL)
4036 return FALSE;
4037
4038 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4039 {
4040 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4041 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4042 PLT_IFUNC);
4043 if (ifunc == NULL)
4044 return FALSE;
4045
4046 /* STT_GNU_IFUNC symbols must have a PLT entry;
4047 In a non-pie executable even when there are
4048 no plt calls. */
4049 if (!bfd_link_pic (info)
4050 || is_branch_reloc (r_type))
4051 {
4052 bfd_vma addend = 0;
4053 if (r_type == R_PPC_PLTREL24)
4054 {
4055 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4056 if (bfd_link_pic (info))
4057 addend = rel->r_addend;
4058 }
4059 if (!update_plt_info (abfd, ifunc, got2, addend))
4060 return FALSE;
4061 }
4062 }
4063 }
4064
4065 if (!htab->is_vxworks
4066 && is_branch_reloc (r_type)
4067 && h != NULL
4068 && h == tga)
4069 {
4070 if (rel != relocs
4071 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4072 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4073 /* We have a new-style __tls_get_addr call with a marker
4074 reloc. */
4075 ;
4076 else
4077 /* Mark this section as having an old-style call. */
4078 sec->has_tls_get_addr_call = 1;
4079 }
4080
4081 switch (r_type)
4082 {
4083 case R_PPC_TLSGD:
4084 case R_PPC_TLSLD:
4085 /* These special tls relocs tie a call to __tls_get_addr with
4086 its parameter symbol. */
4087 break;
4088
4089 case R_PPC_GOT_TLSLD16:
4090 case R_PPC_GOT_TLSLD16_LO:
4091 case R_PPC_GOT_TLSLD16_HI:
4092 case R_PPC_GOT_TLSLD16_HA:
4093 tls_type = TLS_TLS | TLS_LD;
4094 goto dogottls;
4095
4096 case R_PPC_GOT_TLSGD16:
4097 case R_PPC_GOT_TLSGD16_LO:
4098 case R_PPC_GOT_TLSGD16_HI:
4099 case R_PPC_GOT_TLSGD16_HA:
4100 tls_type = TLS_TLS | TLS_GD;
4101 goto dogottls;
4102
4103 case R_PPC_GOT_TPREL16:
4104 case R_PPC_GOT_TPREL16_LO:
4105 case R_PPC_GOT_TPREL16_HI:
4106 case R_PPC_GOT_TPREL16_HA:
4107 if (bfd_link_dll (info))
4108 info->flags |= DF_STATIC_TLS;
4109 tls_type = TLS_TLS | TLS_TPREL;
4110 goto dogottls;
4111
4112 case R_PPC_GOT_DTPREL16:
4113 case R_PPC_GOT_DTPREL16_LO:
4114 case R_PPC_GOT_DTPREL16_HI:
4115 case R_PPC_GOT_DTPREL16_HA:
4116 tls_type = TLS_TLS | TLS_DTPREL;
4117 dogottls:
4118 sec->has_tls_reloc = 1;
4119 /* Fall through. */
4120
4121 /* GOT16 relocations */
4122 case R_PPC_GOT16:
4123 case R_PPC_GOT16_LO:
4124 case R_PPC_GOT16_HI:
4125 case R_PPC_GOT16_HA:
4126 /* This symbol requires a global offset table entry. */
4127 if (htab->elf.sgot == NULL)
4128 {
4129 if (htab->elf.dynobj == NULL)
4130 htab->elf.dynobj = abfd;
4131 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4132 return FALSE;
4133 }
4134 if (h != NULL)
4135 {
4136 h->got.refcount += 1;
4137 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4138 }
4139 else
4140 /* This is a global offset table entry for a local symbol. */
4141 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4142 return FALSE;
4143
4144 /* We may also need a plt entry if the symbol turns out to be
4145 an ifunc. */
4146 if (h != NULL && !bfd_link_pic (info))
4147 {
4148 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4149 return FALSE;
4150 }
4151 break;
4152
4153 /* Indirect .sdata relocation. */
4154 case R_PPC_EMB_SDAI16:
4155 if (bfd_link_pic (info))
4156 {
4157 bad_shared_reloc (abfd, r_type);
4158 return FALSE;
4159 }
4160 htab->sdata[0].sym->ref_regular = 1;
4161 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4162 h, rel))
4163 return FALSE;
4164 if (h != NULL)
4165 {
4166 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4167 h->non_got_ref = TRUE;
4168 }
4169 break;
4170
4171 /* Indirect .sdata2 relocation. */
4172 case R_PPC_EMB_SDA2I16:
4173 if (bfd_link_pic (info))
4174 {
4175 bad_shared_reloc (abfd, r_type);
4176 return FALSE;
4177 }
4178 htab->sdata[1].sym->ref_regular = 1;
4179 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4180 h, rel))
4181 return FALSE;
4182 if (h != NULL)
4183 {
4184 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4185 h->non_got_ref = TRUE;
4186 }
4187 break;
4188
4189 case R_PPC_SDAREL16:
4190 htab->sdata[0].sym->ref_regular = 1;
4191 /* Fall through. */
4192
4193 case R_PPC_VLE_SDAREL_LO16A:
4194 case R_PPC_VLE_SDAREL_LO16D:
4195 case R_PPC_VLE_SDAREL_HI16A:
4196 case R_PPC_VLE_SDAREL_HI16D:
4197 case R_PPC_VLE_SDAREL_HA16A:
4198 case R_PPC_VLE_SDAREL_HA16D:
4199 if (h != NULL)
4200 {
4201 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4202 h->non_got_ref = TRUE;
4203 }
4204 break;
4205
4206 case R_PPC_VLE_REL8:
4207 case R_PPC_VLE_REL15:
4208 case R_PPC_VLE_REL24:
4209 case R_PPC_VLE_LO16A:
4210 case R_PPC_VLE_LO16D:
4211 case R_PPC_VLE_HI16A:
4212 case R_PPC_VLE_HI16D:
4213 case R_PPC_VLE_HA16A:
4214 case R_PPC_VLE_HA16D:
4215 case R_PPC_VLE_ADDR20:
4216 break;
4217
4218 case R_PPC_EMB_SDA2REL:
4219 if (bfd_link_pic (info))
4220 {
4221 bad_shared_reloc (abfd, r_type);
4222 return FALSE;
4223 }
4224 htab->sdata[1].sym->ref_regular = 1;
4225 if (h != NULL)
4226 {
4227 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4228 h->non_got_ref = TRUE;
4229 }
4230 break;
4231
4232 case R_PPC_VLE_SDA21_LO:
4233 case R_PPC_VLE_SDA21:
4234 case R_PPC_EMB_SDA21:
4235 case R_PPC_EMB_RELSDA:
4236 if (bfd_link_pic (info))
4237 {
4238 bad_shared_reloc (abfd, r_type);
4239 return FALSE;
4240 }
4241 if (h != NULL)
4242 {
4243 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4244 h->non_got_ref = TRUE;
4245 }
4246 break;
4247
4248 case R_PPC_EMB_NADDR32:
4249 case R_PPC_EMB_NADDR16:
4250 case R_PPC_EMB_NADDR16_LO:
4251 case R_PPC_EMB_NADDR16_HI:
4252 case R_PPC_EMB_NADDR16_HA:
4253 if (bfd_link_pic (info))
4254 {
4255 bad_shared_reloc (abfd, r_type);
4256 return FALSE;
4257 }
4258 if (h != NULL)
4259 h->non_got_ref = TRUE;
4260 break;
4261
4262 case R_PPC_PLTREL24:
4263 if (h == NULL)
4264 break;
4265 /* Fall through */
4266 case R_PPC_PLT32:
4267 case R_PPC_PLTREL32:
4268 case R_PPC_PLT16_LO:
4269 case R_PPC_PLT16_HI:
4270 case R_PPC_PLT16_HA:
4271 #ifdef DEBUG
4272 fprintf (stderr, "Reloc requires a PLT entry\n");
4273 #endif
4274 /* This symbol requires a procedure linkage table entry. */
4275 if (h == NULL)
4276 {
4277 if (ifunc == NULL)
4278 {
4279 /* It does not make sense to have a procedure linkage
4280 table entry for a non-ifunc local symbol. */
4281 info->callbacks->einfo
4282 /* xgettext:c-format */
4283 (_("%H: %s reloc against local symbol\n"),
4284 abfd, sec, rel->r_offset,
4285 ppc_elf_howto_table[r_type]->name);
4286 bfd_set_error (bfd_error_bad_value);
4287 return FALSE;
4288 }
4289 }
4290 else
4291 {
4292 bfd_vma addend = 0;
4293
4294 if (r_type == R_PPC_PLTREL24)
4295 {
4296 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4297 if (bfd_link_pic (info))
4298 addend = rel->r_addend;
4299 }
4300 h->needs_plt = 1;
4301 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4302 return FALSE;
4303 }
4304 break;
4305
4306 /* The following relocations don't need to propagate the
4307 relocation if linking a shared object since they are
4308 section relative. */
4309 case R_PPC_SECTOFF:
4310 case R_PPC_SECTOFF_LO:
4311 case R_PPC_SECTOFF_HI:
4312 case R_PPC_SECTOFF_HA:
4313 case R_PPC_DTPREL16:
4314 case R_PPC_DTPREL16_LO:
4315 case R_PPC_DTPREL16_HI:
4316 case R_PPC_DTPREL16_HA:
4317 case R_PPC_TOC16:
4318 break;
4319
4320 case R_PPC_REL16:
4321 case R_PPC_REL16_LO:
4322 case R_PPC_REL16_HI:
4323 case R_PPC_REL16_HA:
4324 case R_PPC_REL16DX_HA:
4325 ppc_elf_tdata (abfd)->has_rel16 = 1;
4326 break;
4327
4328 /* These are just markers. */
4329 case R_PPC_TLS:
4330 case R_PPC_EMB_MRKREF:
4331 case R_PPC_NONE:
4332 case R_PPC_max:
4333 case R_PPC_RELAX:
4334 case R_PPC_RELAX_PLT:
4335 case R_PPC_RELAX_PLTREL24:
4336 case R_PPC_16DX_HA:
4337 break;
4338
4339 /* These should only appear in dynamic objects. */
4340 case R_PPC_COPY:
4341 case R_PPC_GLOB_DAT:
4342 case R_PPC_JMP_SLOT:
4343 case R_PPC_RELATIVE:
4344 case R_PPC_IRELATIVE:
4345 break;
4346
4347 /* These aren't handled yet. We'll report an error later. */
4348 case R_PPC_ADDR30:
4349 case R_PPC_EMB_RELSEC16:
4350 case R_PPC_EMB_RELST_LO:
4351 case R_PPC_EMB_RELST_HI:
4352 case R_PPC_EMB_RELST_HA:
4353 case R_PPC_EMB_BIT_FLD:
4354 break;
4355
4356 /* This refers only to functions defined in the shared library. */
4357 case R_PPC_LOCAL24PC:
4358 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4359 {
4360 htab->plt_type = PLT_OLD;
4361 htab->old_bfd = abfd;
4362 }
4363 if (h != NULL && h->type == STT_GNU_IFUNC)
4364 {
4365 h->needs_plt = 1;
4366 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4367 return FALSE;
4368 }
4369 break;
4370
4371 /* This relocation describes the C++ object vtable hierarchy.
4372 Reconstruct it for later use during GC. */
4373 case R_PPC_GNU_VTINHERIT:
4374 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4375 return FALSE;
4376 break;
4377
4378 /* This relocation describes which C++ vtable entries are actually
4379 used. Record for later use during GC. */
4380 case R_PPC_GNU_VTENTRY:
4381 BFD_ASSERT (h != NULL);
4382 if (h != NULL
4383 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4384 return FALSE;
4385 break;
4386
4387 /* We shouldn't really be seeing TPREL32. */
4388 case R_PPC_TPREL32:
4389 case R_PPC_TPREL16:
4390 case R_PPC_TPREL16_LO:
4391 case R_PPC_TPREL16_HI:
4392 case R_PPC_TPREL16_HA:
4393 if (bfd_link_dll (info))
4394 info->flags |= DF_STATIC_TLS;
4395 goto dodyn;
4396
4397 /* Nor these. */
4398 case R_PPC_DTPMOD32:
4399 case R_PPC_DTPREL32:
4400 goto dodyn;
4401
4402 case R_PPC_REL32:
4403 if (h == NULL
4404 && got2 != NULL
4405 && (sec->flags & SEC_CODE) != 0
4406 && bfd_link_pic (info)
4407 && htab->plt_type == PLT_UNSET)
4408 {
4409 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4410 the start of a function, which assembles to a REL32
4411 reference to .got2. If we detect one of these, then
4412 force the old PLT layout because the linker cannot
4413 reliably deduce the GOT pointer value needed for
4414 PLT call stubs. */
4415 asection *s;
4416 Elf_Internal_Sym *isym;
4417
4418 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4419 abfd, r_symndx);
4420 if (isym == NULL)
4421 return FALSE;
4422
4423 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4424 if (s == got2)
4425 {
4426 htab->plt_type = PLT_OLD;
4427 htab->old_bfd = abfd;
4428 }
4429 }
4430 if (h == NULL || h == htab->elf.hgot)
4431 break;
4432 /* fall through */
4433
4434 case R_PPC_ADDR32:
4435 case R_PPC_ADDR16:
4436 case R_PPC_ADDR16_LO:
4437 case R_PPC_ADDR16_HI:
4438 case R_PPC_ADDR16_HA:
4439 case R_PPC_UADDR32:
4440 case R_PPC_UADDR16:
4441 if (h != NULL && !bfd_link_pic (info))
4442 {
4443 /* We may need a plt entry if the symbol turns out to be
4444 a function defined in a dynamic object. */
4445 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4446 return FALSE;
4447
4448 /* We may need a copy reloc too. */
4449 h->non_got_ref = 1;
4450 h->pointer_equality_needed = 1;
4451 if (r_type == R_PPC_ADDR16_HA)
4452 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4453 if (r_type == R_PPC_ADDR16_LO)
4454 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4455 }
4456 goto dodyn;
4457
4458 case R_PPC_REL24:
4459 case R_PPC_REL14:
4460 case R_PPC_REL14_BRTAKEN:
4461 case R_PPC_REL14_BRNTAKEN:
4462 if (h == NULL)
4463 break;
4464 if (h == htab->elf.hgot)
4465 {
4466 if (htab->plt_type == PLT_UNSET)
4467 {
4468 htab->plt_type = PLT_OLD;
4469 htab->old_bfd = abfd;
4470 }
4471 break;
4472 }
4473 /* fall through */
4474
4475 case R_PPC_ADDR24:
4476 case R_PPC_ADDR14:
4477 case R_PPC_ADDR14_BRTAKEN:
4478 case R_PPC_ADDR14_BRNTAKEN:
4479 if (h != NULL && !bfd_link_pic (info))
4480 {
4481 /* We may need a plt entry if the symbol turns out to be
4482 a function defined in a dynamic object. */
4483 h->needs_plt = 1;
4484 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4485 return FALSE;
4486 break;
4487 }
4488
4489 dodyn:
4490 /* If we are creating a shared library, and this is a reloc
4491 against a global symbol, or a non PC relative reloc
4492 against a local symbol, then we need to copy the reloc
4493 into the shared library. However, if we are linking with
4494 -Bsymbolic, we do not need to copy a reloc against a
4495 global symbol which is defined in an object we are
4496 including in the link (i.e., DEF_REGULAR is set). At
4497 this point we have not seen all the input files, so it is
4498 possible that DEF_REGULAR is not set now but will be set
4499 later (it is never cleared). In case of a weak definition,
4500 DEF_REGULAR may be cleared later by a strong definition in
4501 a shared library. We account for that possibility below by
4502 storing information in the dyn_relocs field of the hash
4503 table entry. A similar situation occurs when creating
4504 shared libraries and symbol visibility changes render the
4505 symbol local.
4506
4507 If on the other hand, we are creating an executable, we
4508 may need to keep relocations for symbols satisfied by a
4509 dynamic library if we manage to avoid copy relocs for the
4510 symbol. */
4511 if ((bfd_link_pic (info)
4512 && (must_be_dyn_reloc (info, r_type)
4513 || (h != NULL
4514 && (!SYMBOLIC_BIND (info, h)
4515 || h->root.type == bfd_link_hash_defweak
4516 || !h->def_regular))))
4517 || (ELIMINATE_COPY_RELOCS
4518 && !bfd_link_pic (info)
4519 && h != NULL
4520 && (h->root.type == bfd_link_hash_defweak
4521 || !h->def_regular)))
4522 {
4523 #ifdef DEBUG
4524 fprintf (stderr,
4525 "ppc_elf_check_relocs needs to "
4526 "create relocation for %s\n",
4527 (h && h->root.root.string
4528 ? h->root.root.string : "<unknown>"));
4529 #endif
4530 if (sreloc == NULL)
4531 {
4532 if (htab->elf.dynobj == NULL)
4533 htab->elf.dynobj = abfd;
4534
4535 sreloc = _bfd_elf_make_dynamic_reloc_section
4536 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4537
4538 if (sreloc == NULL)
4539 return FALSE;
4540 }
4541
4542 /* If this is a global symbol, we count the number of
4543 relocations we need for this symbol. */
4544 if (h != NULL)
4545 {
4546 struct elf_dyn_relocs *p;
4547 struct elf_dyn_relocs **rel_head;
4548
4549 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4550 p = *rel_head;
4551 if (p == NULL || p->sec != sec)
4552 {
4553 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4554 if (p == NULL)
4555 return FALSE;
4556 p->next = *rel_head;
4557 *rel_head = p;
4558 p->sec = sec;
4559 p->count = 0;
4560 p->pc_count = 0;
4561 }
4562 p->count += 1;
4563 if (!must_be_dyn_reloc (info, r_type))
4564 p->pc_count += 1;
4565 }
4566 else
4567 {
4568 /* Track dynamic relocs needed for local syms too.
4569 We really need local syms available to do this
4570 easily. Oh well. */
4571 struct ppc_dyn_relocs *p;
4572 struct ppc_dyn_relocs **rel_head;
4573 bfd_boolean is_ifunc;
4574 asection *s;
4575 void *vpp;
4576 Elf_Internal_Sym *isym;
4577
4578 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4579 abfd, r_symndx);
4580 if (isym == NULL)
4581 return FALSE;
4582
4583 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4584 if (s == NULL)
4585 s = sec;
4586
4587 vpp = &elf_section_data (s)->local_dynrel;
4588 rel_head = (struct ppc_dyn_relocs **) vpp;
4589 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4590 p = *rel_head;
4591 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4592 p = p->next;
4593 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4594 {
4595 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4596 if (p == NULL)
4597 return FALSE;
4598 p->next = *rel_head;
4599 *rel_head = p;
4600 p->sec = sec;
4601 p->ifunc = is_ifunc;
4602 p->count = 0;
4603 }
4604 p->count += 1;
4605 }
4606 }
4607
4608 break;
4609 }
4610 }
4611
4612 return TRUE;
4613 }
4614 \f
4615 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4616 and OBFD, and merge non-conflicting ones. */
4617 void
4618 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4619 {
4620 bfd *obfd = info->output_bfd;
4621 obj_attribute *in_attr, *in_attrs;
4622 obj_attribute *out_attr, *out_attrs;
4623
4624 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4625 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4626
4627 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4628 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4629
4630 if (in_attr->i != out_attr->i)
4631 {
4632 int in_fp = in_attr->i & 3;
4633 int out_fp = out_attr->i & 3;
4634
4635 if (in_fp == 0)
4636 ;
4637 else if (out_fp == 0)
4638 {
4639 out_attr->type = 1;
4640 out_attr->i ^= in_fp;
4641 }
4642 else if (out_fp != 2 && in_fp == 2)
4643 _bfd_error_handler
4644 /* xgettext:c-format */
4645 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4646 else if (out_fp == 2 && in_fp != 2)
4647 _bfd_error_handler
4648 /* xgettext:c-format */
4649 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4650 else if (out_fp == 1 && in_fp == 3)
4651 _bfd_error_handler
4652 /* xgettext:c-format */
4653 (_("Warning: %B uses double-precision hard float, "
4654 "%B uses single-precision hard float"), obfd, ibfd);
4655 else if (out_fp == 3 && in_fp == 1)
4656 _bfd_error_handler
4657 /* xgettext:c-format */
4658 (_("Warning: %B uses double-precision hard float, "
4659 "%B uses single-precision hard float"), ibfd, obfd);
4660
4661 in_fp = in_attr->i & 0xc;
4662 out_fp = out_attr->i & 0xc;
4663 if (in_fp == 0)
4664 ;
4665 else if (out_fp == 0)
4666 {
4667 out_attr->type = 1;
4668 out_attr->i ^= in_fp;
4669 }
4670 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4671 _bfd_error_handler
4672 /* xgettext:c-format */
4673 (_("Warning: %B uses 64-bit long double, "
4674 "%B uses 128-bit long double"), ibfd, obfd);
4675 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4676 _bfd_error_handler
4677 /* xgettext:c-format */
4678 (_("Warning: %B uses 64-bit long double, "
4679 "%B uses 128-bit long double"), obfd, ibfd);
4680 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4681 _bfd_error_handler
4682 /* xgettext:c-format */
4683 (_("Warning: %B uses IBM long double, "
4684 "%B uses IEEE long double"), ibfd, obfd);
4685 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4686 _bfd_error_handler
4687 /* xgettext:c-format */
4688 (_("Warning: %B uses IBM long double, "
4689 "%B uses IEEE long double"), obfd, ibfd);
4690 }
4691 }
4692
4693 /* Merge object attributes from IBFD into OBFD. Warn if
4694 there are conflicting attributes. */
4695 static bfd_boolean
4696 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4697 {
4698 bfd *obfd;
4699 obj_attribute *in_attr, *in_attrs;
4700 obj_attribute *out_attr, *out_attrs;
4701
4702 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4703
4704 obfd = info->output_bfd;
4705 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4706 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4707
4708 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4709 merge non-conflicting ones. */
4710 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4711 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4712 if (in_attr->i != out_attr->i)
4713 {
4714 int in_vec = in_attr->i & 3;
4715 int out_vec = out_attr->i & 3;
4716
4717 if (in_vec == 0)
4718 ;
4719 else if (out_vec == 0)
4720 {
4721 out_attr->type = 1;
4722 out_attr->i = in_vec;
4723 }
4724 /* For now, allow generic to transition to AltiVec or SPE
4725 without a warning. If GCC marked files with their stack
4726 alignment and used don't-care markings for files which are
4727 not affected by the vector ABI, we could warn about this
4728 case too. */
4729 else if (in_vec == 1)
4730 ;
4731 else if (out_vec == 1)
4732 {
4733 out_attr->type = 1;
4734 out_attr->i = in_vec;
4735 }
4736 else if (out_vec < in_vec)
4737 _bfd_error_handler
4738 /* xgettext:c-format */
4739 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4740 obfd, ibfd);
4741 else if (out_vec > in_vec)
4742 _bfd_error_handler
4743 /* xgettext:c-format */
4744 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4745 ibfd, obfd);
4746 }
4747
4748 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4749 and merge non-conflicting ones. */
4750 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4751 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4752 if (in_attr->i != out_attr->i)
4753 {
4754 int in_struct = in_attr->i & 3;
4755 int out_struct = out_attr->i & 3;
4756
4757 if (in_struct == 0 || in_struct == 3)
4758 ;
4759 else if (out_struct == 0)
4760 {
4761 out_attr->type = 1;
4762 out_attr->i = in_struct;
4763 }
4764 else if (out_struct < in_struct)
4765 _bfd_error_handler
4766 /* xgettext:c-format */
4767 (_("Warning: %B uses r3/r4 for small structure returns, "
4768 "%B uses memory"), obfd, ibfd);
4769 else if (out_struct > in_struct)
4770 _bfd_error_handler
4771 /* xgettext:c-format */
4772 (_("Warning: %B uses r3/r4 for small structure returns, "
4773 "%B uses memory"), ibfd, obfd);
4774 }
4775
4776 /* Merge Tag_compatibility attributes and any common GNU ones. */
4777 _bfd_elf_merge_object_attributes (ibfd, info);
4778
4779 return TRUE;
4780 }
4781
4782 /* Merge backend specific data from an object file to the output
4783 object file when linking. */
4784
4785 static bfd_boolean
4786 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4787 {
4788 bfd *obfd = info->output_bfd;
4789 flagword old_flags;
4790 flagword new_flags;
4791 bfd_boolean error;
4792
4793 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4794 return TRUE;
4795
4796 /* Check if we have the same endianness. */
4797 if (! _bfd_generic_verify_endian_match (ibfd, info))
4798 return FALSE;
4799
4800 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4801 return FALSE;
4802
4803 new_flags = elf_elfheader (ibfd)->e_flags;
4804 old_flags = elf_elfheader (obfd)->e_flags;
4805 if (!elf_flags_init (obfd))
4806 {
4807 /* First call, no flags set. */
4808 elf_flags_init (obfd) = TRUE;
4809 elf_elfheader (obfd)->e_flags = new_flags;
4810 }
4811
4812 /* Compatible flags are ok. */
4813 else if (new_flags == old_flags)
4814 ;
4815
4816 /* Incompatible flags. */
4817 else
4818 {
4819 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4820 to be linked with either. */
4821 error = FALSE;
4822 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4823 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4824 {
4825 error = TRUE;
4826 _bfd_error_handler
4827 (_("%B: compiled with -mrelocatable and linked with "
4828 "modules compiled normally"), ibfd);
4829 }
4830 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4831 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4832 {
4833 error = TRUE;
4834 _bfd_error_handler
4835 (_("%B: compiled normally and linked with "
4836 "modules compiled with -mrelocatable"), ibfd);
4837 }
4838
4839 /* The output is -mrelocatable-lib iff both the input files are. */
4840 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4841 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4842
4843 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4844 but each input file is either -mrelocatable or -mrelocatable-lib. */
4845 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4846 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4847 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4848 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4849
4850 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4851 any module uses it. */
4852 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4853
4854 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4855 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4856
4857 /* Warn about any other mismatches. */
4858 if (new_flags != old_flags)
4859 {
4860 error = TRUE;
4861 _bfd_error_handler
4862 /* xgettext:c-format */
4863 (_("%B: uses different e_flags (%#x) fields "
4864 "than previous modules (%#x)"),
4865 ibfd, new_flags, old_flags);
4866 }
4867
4868 if (error)
4869 {
4870 bfd_set_error (bfd_error_bad_value);
4871 return FALSE;
4872 }
4873 }
4874
4875 return TRUE;
4876 }
4877
4878 static void
4879 ppc_elf_vle_split16 (bfd *input_bfd,
4880 asection *input_section,
4881 unsigned long offset,
4882 bfd_byte *loc,
4883 bfd_vma value,
4884 split16_format_type split16_format,
4885 bfd_boolean fixup)
4886 {
4887 unsigned int insn, opcode, top5;
4888
4889 insn = bfd_get_32 (input_bfd, loc);
4890 opcode = insn & 0xfc00f800;
4891 if (opcode == E_OR2I_INSN
4892 || opcode == E_AND2I_DOT_INSN
4893 || opcode == E_OR2IS_INSN
4894 || opcode == E_LIS_INSN
4895 || opcode == E_AND2IS_DOT_INSN)
4896 {
4897 if (split16_format != split16a_type)
4898 {
4899 if (fixup)
4900 split16_format = split16a_type;
4901 else
4902 _bfd_error_handler
4903 /* xgettext:c-format */
4904 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4905 input_bfd, input_section, offset, opcode);
4906 }
4907 }
4908 else if (opcode == E_ADD2I_DOT_INSN
4909 || opcode == E_ADD2IS_INSN
4910 || opcode == E_CMP16I_INSN
4911 || opcode == E_MULL2I_INSN
4912 || opcode == E_CMPL16I_INSN
4913 || opcode == E_CMPH16I_INSN
4914 || opcode == E_CMPHL16I_INSN)
4915 {
4916 if (split16_format != split16d_type)
4917 {
4918 if (fixup)
4919 split16_format = split16d_type;
4920 else
4921 _bfd_error_handler
4922 /* xgettext:c-format */
4923 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4924 input_bfd, input_section, offset, opcode);
4925 }
4926 }
4927 top5 = value & 0xf800;
4928 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
4929 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
4930 insn |= top5;
4931 insn |= value & 0x7ff;
4932 bfd_put_32 (input_bfd, insn, loc);
4933 }
4934
4935 static void
4936 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
4937 {
4938 unsigned int insn;
4939
4940 insn = bfd_get_32 (output_bfd, loc);
4941 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
4942 /* Top 4 bits of value to 17..20. */
4943 insn |= (value & 0xf0000) >> 5;
4944 /* Next 5 bits of the value to 11..15. */
4945 insn |= (value & 0xf800) << 5;
4946 /* And the final 11 bits of the value to bits 21 to 31. */
4947 insn |= value & 0x7ff;
4948 bfd_put_32 (output_bfd, insn, loc);
4949 }
4950
4951 \f
4952 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4953 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4954 int
4955 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4956 struct bfd_link_info *info)
4957 {
4958 struct ppc_elf_link_hash_table *htab;
4959 flagword flags;
4960
4961 htab = ppc_elf_hash_table (info);
4962
4963 if (htab->plt_type == PLT_UNSET)
4964 {
4965 struct elf_link_hash_entry *h;
4966
4967 if (htab->params->plt_style == PLT_OLD)
4968 htab->plt_type = PLT_OLD;
4969 else if (bfd_link_pic (info)
4970 && htab->elf.dynamic_sections_created
4971 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4972 FALSE, FALSE, TRUE)) != NULL
4973 && (h->type == STT_FUNC
4974 || h->needs_plt)
4975 && h->ref_regular
4976 && !(SYMBOL_CALLS_LOCAL (info, h)
4977 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
4978 {
4979 /* Profiling of shared libs (and pies) is not supported with
4980 secure plt, because ppc32 does profiling before a
4981 function prologue and a secure plt pic call stubs needs
4982 r30 to be set up. */
4983 htab->plt_type = PLT_OLD;
4984 }
4985 else
4986 {
4987 bfd *ibfd;
4988 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4989
4990 /* Look through the reloc flags left by ppc_elf_check_relocs.
4991 Use the old style bss plt if a file makes plt calls
4992 without using the new relocs, and if ld isn't given
4993 --secure-plt and we never see REL16 relocs. */
4994 if (plt_type == PLT_UNSET)
4995 plt_type = PLT_OLD;
4996 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4997 if (is_ppc_elf (ibfd))
4998 {
4999 if (ppc_elf_tdata (ibfd)->has_rel16)
5000 plt_type = PLT_NEW;
5001 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5002 {
5003 plt_type = PLT_OLD;
5004 htab->old_bfd = ibfd;
5005 break;
5006 }
5007 }
5008 htab->plt_type = plt_type;
5009 }
5010 }
5011 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5012 {
5013 if (htab->old_bfd != NULL)
5014 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5015 htab->old_bfd);
5016 else
5017 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5018 }
5019
5020 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5021
5022 if (htab->plt_type == PLT_NEW)
5023 {
5024 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5025 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5026
5027 /* The new PLT is a loaded section. */
5028 if (htab->elf.splt != NULL
5029 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5030 return -1;
5031
5032 /* The new GOT is not executable. */
5033 if (htab->elf.sgot != NULL
5034 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5035 return -1;
5036 }
5037 else
5038 {
5039 /* Stop an unused .glink section from affecting .text alignment. */
5040 if (htab->glink != NULL
5041 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5042 return -1;
5043 }
5044 return htab->plt_type == PLT_NEW;
5045 }
5046 \f
5047 /* Return the section that should be marked against GC for a given
5048 relocation. */
5049
5050 static asection *
5051 ppc_elf_gc_mark_hook (asection *sec,
5052 struct bfd_link_info *info,
5053 Elf_Internal_Rela *rel,
5054 struct elf_link_hash_entry *h,
5055 Elf_Internal_Sym *sym)
5056 {
5057 if (h != NULL)
5058 switch (ELF32_R_TYPE (rel->r_info))
5059 {
5060 case R_PPC_GNU_VTINHERIT:
5061 case R_PPC_GNU_VTENTRY:
5062 return NULL;
5063 }
5064
5065 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5066 }
5067 \f
5068 /* Set plt output section type, htab->tls_get_addr, and call the
5069 generic ELF tls_setup function. */
5070
5071 asection *
5072 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5073 {
5074 struct ppc_elf_link_hash_table *htab;
5075
5076 htab = ppc_elf_hash_table (info);
5077 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5078 FALSE, FALSE, TRUE);
5079 if (htab->plt_type != PLT_NEW)
5080 htab->params->no_tls_get_addr_opt = TRUE;
5081
5082 if (!htab->params->no_tls_get_addr_opt)
5083 {
5084 struct elf_link_hash_entry *opt, *tga;
5085 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5086 FALSE, FALSE, TRUE);
5087 if (opt != NULL
5088 && (opt->root.type == bfd_link_hash_defined
5089 || opt->root.type == bfd_link_hash_defweak))
5090 {
5091 /* If glibc supports an optimized __tls_get_addr call stub,
5092 signalled by the presence of __tls_get_addr_opt, and we'll
5093 be calling __tls_get_addr via a plt call stub, then
5094 make __tls_get_addr point to __tls_get_addr_opt. */
5095 tga = htab->tls_get_addr;
5096 if (htab->elf.dynamic_sections_created
5097 && tga != NULL
5098 && (tga->type == STT_FUNC
5099 || tga->needs_plt)
5100 && !(SYMBOL_CALLS_LOCAL (info, tga)
5101 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5102 {
5103 struct plt_entry *ent;
5104 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5105 if (ent->plt.refcount > 0)
5106 break;
5107 if (ent != NULL)
5108 {
5109 tga->root.type = bfd_link_hash_indirect;
5110 tga->root.u.i.link = &opt->root;
5111 ppc_elf_copy_indirect_symbol (info, opt, tga);
5112 opt->mark = 1;
5113 if (opt->dynindx != -1)
5114 {
5115 /* Use __tls_get_addr_opt in dynamic relocations. */
5116 opt->dynindx = -1;
5117 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5118 opt->dynstr_index);
5119 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5120 return FALSE;
5121 }
5122 htab->tls_get_addr = opt;
5123 }
5124 }
5125 }
5126 else
5127 htab->params->no_tls_get_addr_opt = TRUE;
5128 }
5129 if (htab->plt_type == PLT_NEW
5130 && htab->elf.splt != NULL
5131 && htab->elf.splt->output_section != NULL)
5132 {
5133 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5134 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5135 }
5136
5137 return _bfd_elf_tls_setup (obfd, info);
5138 }
5139
5140 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5141 HASH. */
5142
5143 static bfd_boolean
5144 branch_reloc_hash_match (const bfd *ibfd,
5145 const Elf_Internal_Rela *rel,
5146 const struct elf_link_hash_entry *hash)
5147 {
5148 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5149 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5150 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5151
5152 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5153 {
5154 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5155 struct elf_link_hash_entry *h;
5156
5157 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5158 while (h->root.type == bfd_link_hash_indirect
5159 || h->root.type == bfd_link_hash_warning)
5160 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5161 if (h == hash)
5162 return TRUE;
5163 }
5164 return FALSE;
5165 }
5166
5167 /* Run through all the TLS relocs looking for optimization
5168 opportunities. */
5169
5170 bfd_boolean
5171 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5172 struct bfd_link_info *info)
5173 {
5174 bfd *ibfd;
5175 asection *sec;
5176 struct ppc_elf_link_hash_table *htab;
5177 int pass;
5178
5179 if (!bfd_link_executable (info))
5180 return TRUE;
5181
5182 htab = ppc_elf_hash_table (info);
5183 if (htab == NULL)
5184 return FALSE;
5185
5186 /* Make two passes through the relocs. First time check that tls
5187 relocs involved in setting up a tls_get_addr call are indeed
5188 followed by such a call. If they are not, don't do any tls
5189 optimization. On the second pass twiddle tls_mask flags to
5190 notify relocate_section that optimization can be done, and
5191 adjust got and plt refcounts. */
5192 for (pass = 0; pass < 2; ++pass)
5193 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5194 {
5195 Elf_Internal_Sym *locsyms = NULL;
5196 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5197 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5198
5199 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5200 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5201 {
5202 Elf_Internal_Rela *relstart, *rel, *relend;
5203 int expecting_tls_get_addr = 0;
5204
5205 /* Read the relocations. */
5206 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5207 info->keep_memory);
5208 if (relstart == NULL)
5209 return FALSE;
5210
5211 relend = relstart + sec->reloc_count;
5212 for (rel = relstart; rel < relend; rel++)
5213 {
5214 enum elf_ppc_reloc_type r_type;
5215 unsigned long r_symndx;
5216 struct elf_link_hash_entry *h = NULL;
5217 char *tls_mask;
5218 char tls_set, tls_clear;
5219 bfd_boolean is_local;
5220 bfd_signed_vma *got_count;
5221
5222 r_symndx = ELF32_R_SYM (rel->r_info);
5223 if (r_symndx >= symtab_hdr->sh_info)
5224 {
5225 struct elf_link_hash_entry **sym_hashes;
5226
5227 sym_hashes = elf_sym_hashes (ibfd);
5228 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5229 while (h->root.type == bfd_link_hash_indirect
5230 || h->root.type == bfd_link_hash_warning)
5231 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5232 }
5233
5234 is_local = FALSE;
5235 if (h == NULL
5236 || !h->def_dynamic)
5237 is_local = TRUE;
5238
5239 r_type = ELF32_R_TYPE (rel->r_info);
5240 /* If this section has old-style __tls_get_addr calls
5241 without marker relocs, then check that each
5242 __tls_get_addr call reloc is preceded by a reloc
5243 that conceivably belongs to the __tls_get_addr arg
5244 setup insn. If we don't find matching arg setup
5245 relocs, don't do any tls optimization. */
5246 if (pass == 0
5247 && sec->has_tls_get_addr_call
5248 && h != NULL
5249 && h == htab->tls_get_addr
5250 && !expecting_tls_get_addr
5251 && is_branch_reloc (r_type))
5252 {
5253 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5254 "TLS optimization disabled\n",
5255 ibfd, sec, rel->r_offset);
5256 if (elf_section_data (sec)->relocs != relstart)
5257 free (relstart);
5258 return TRUE;
5259 }
5260
5261 expecting_tls_get_addr = 0;
5262 switch (r_type)
5263 {
5264 case R_PPC_GOT_TLSLD16:
5265 case R_PPC_GOT_TLSLD16_LO:
5266 expecting_tls_get_addr = 1;
5267 /* Fall through. */
5268
5269 case R_PPC_GOT_TLSLD16_HI:
5270 case R_PPC_GOT_TLSLD16_HA:
5271 /* These relocs should never be against a symbol
5272 defined in a shared lib. Leave them alone if
5273 that turns out to be the case. */
5274 if (!is_local)
5275 continue;
5276
5277 /* LD -> LE */
5278 tls_set = 0;
5279 tls_clear = TLS_LD;
5280 break;
5281
5282 case R_PPC_GOT_TLSGD16:
5283 case R_PPC_GOT_TLSGD16_LO:
5284 expecting_tls_get_addr = 1;
5285 /* Fall through. */
5286
5287 case R_PPC_GOT_TLSGD16_HI:
5288 case R_PPC_GOT_TLSGD16_HA:
5289 if (is_local)
5290 /* GD -> LE */
5291 tls_set = 0;
5292 else
5293 /* GD -> IE */
5294 tls_set = TLS_TLS | TLS_TPRELGD;
5295 tls_clear = TLS_GD;
5296 break;
5297
5298 case R_PPC_GOT_TPREL16:
5299 case R_PPC_GOT_TPREL16_LO:
5300 case R_PPC_GOT_TPREL16_HI:
5301 case R_PPC_GOT_TPREL16_HA:
5302 if (is_local)
5303 {
5304 /* IE -> LE */
5305 tls_set = 0;
5306 tls_clear = TLS_TPREL;
5307 break;
5308 }
5309 else
5310 continue;
5311
5312 case R_PPC_TLSGD:
5313 case R_PPC_TLSLD:
5314 expecting_tls_get_addr = 2;
5315 tls_set = 0;
5316 tls_clear = 0;
5317 break;
5318
5319 default:
5320 continue;
5321 }
5322
5323 if (pass == 0)
5324 {
5325 if (!expecting_tls_get_addr
5326 || (expecting_tls_get_addr == 1
5327 && !sec->has_tls_get_addr_call))
5328 continue;
5329
5330 if (rel + 1 < relend
5331 && branch_reloc_hash_match (ibfd, rel + 1,
5332 htab->tls_get_addr))
5333 continue;
5334
5335 /* Uh oh, we didn't find the expected call. We
5336 could just mark this symbol to exclude it
5337 from tls optimization but it's safer to skip
5338 the entire optimization. */
5339 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5340 "TLS optimization disabled\n"),
5341 ibfd, sec, rel->r_offset);
5342 if (elf_section_data (sec)->relocs != relstart)
5343 free (relstart);
5344 return TRUE;
5345 }
5346
5347 if (expecting_tls_get_addr)
5348 {
5349 struct plt_entry *ent;
5350 bfd_vma addend = 0;
5351
5352 if (bfd_link_pic (info)
5353 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5354 addend = rel[1].r_addend;
5355 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5356 got2, addend);
5357 if (ent != NULL && ent->plt.refcount > 0)
5358 ent->plt.refcount -= 1;
5359
5360 if (expecting_tls_get_addr == 2)
5361 continue;
5362 }
5363
5364 if (h != NULL)
5365 {
5366 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5367 got_count = &h->got.refcount;
5368 }
5369 else
5370 {
5371 bfd_signed_vma *lgot_refs;
5372 struct plt_entry **local_plt;
5373 char *lgot_masks;
5374
5375 if (locsyms == NULL)
5376 {
5377 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5378 if (locsyms == NULL)
5379 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5380 symtab_hdr->sh_info,
5381 0, NULL, NULL, NULL);
5382 if (locsyms == NULL)
5383 {
5384 if (elf_section_data (sec)->relocs != relstart)
5385 free (relstart);
5386 return FALSE;
5387 }
5388 }
5389 lgot_refs = elf_local_got_refcounts (ibfd);
5390 if (lgot_refs == NULL)
5391 abort ();
5392 local_plt = (struct plt_entry **)
5393 (lgot_refs + symtab_hdr->sh_info);
5394 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5395 tls_mask = &lgot_masks[r_symndx];
5396 got_count = &lgot_refs[r_symndx];
5397 }
5398
5399 if (tls_set == 0)
5400 {
5401 /* We managed to get rid of a got entry. */
5402 if (*got_count > 0)
5403 *got_count -= 1;
5404 }
5405
5406 *tls_mask |= tls_set;
5407 *tls_mask &= ~tls_clear;
5408 }
5409
5410 if (elf_section_data (sec)->relocs != relstart)
5411 free (relstart);
5412 }
5413
5414 if (locsyms != NULL
5415 && (symtab_hdr->contents != (unsigned char *) locsyms))
5416 {
5417 if (!info->keep_memory)
5418 free (locsyms);
5419 else
5420 symtab_hdr->contents = (unsigned char *) locsyms;
5421 }
5422 }
5423 htab->do_tls_opt = 1;
5424 return TRUE;
5425 }
5426 \f
5427 /* Find dynamic relocs for H that apply to read-only sections. */
5428
5429 static asection *
5430 readonly_dynrelocs (struct elf_link_hash_entry *h)
5431 {
5432 struct elf_dyn_relocs *p;
5433
5434 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5435 {
5436 asection *s = p->sec->output_section;
5437
5438 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5439 return p->sec;
5440 }
5441 return NULL;
5442 }
5443
5444 /* Adjust a symbol defined by a dynamic object and referenced by a
5445 regular object. The current definition is in some section of the
5446 dynamic object, but we're not including those sections. We have to
5447 change the definition to something the rest of the link can
5448 understand. */
5449
5450 static bfd_boolean
5451 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5452 struct elf_link_hash_entry *h)
5453 {
5454 struct ppc_elf_link_hash_table *htab;
5455 asection *s;
5456
5457 #ifdef DEBUG
5458 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5459 h->root.root.string);
5460 #endif
5461
5462 /* Make sure we know what is going on here. */
5463 htab = ppc_elf_hash_table (info);
5464 BFD_ASSERT (htab->elf.dynobj != NULL
5465 && (h->needs_plt
5466 || h->type == STT_GNU_IFUNC
5467 || h->u.weakdef != NULL
5468 || (h->def_dynamic
5469 && h->ref_regular
5470 && !h->def_regular)));
5471
5472 /* Deal with function syms. */
5473 if (h->type == STT_FUNC
5474 || h->type == STT_GNU_IFUNC
5475 || h->needs_plt)
5476 {
5477 /* Clear procedure linkage table information for any symbol that
5478 won't need a .plt entry. */
5479 struct plt_entry *ent;
5480 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5481 if (ent->plt.refcount > 0)
5482 break;
5483 if (ent == NULL
5484 || (h->type != STT_GNU_IFUNC
5485 && (SYMBOL_CALLS_LOCAL (info, h)
5486 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))))
5487 {
5488 /* A PLT entry is not required/allowed when:
5489
5490 1. We are not using ld.so; because then the PLT entry
5491 can't be set up, so we can't use one. In this case,
5492 ppc_elf_adjust_dynamic_symbol won't even be called.
5493
5494 2. GC has rendered the entry unused.
5495
5496 3. We know for certain that a call to this symbol
5497 will go to this object, or will remain undefined. */
5498 h->plt.plist = NULL;
5499 h->needs_plt = 0;
5500 h->pointer_equality_needed = 0;
5501 /* After adjust_dynamic_symbol, non_got_ref set in the
5502 non-pic case means that dyn_relocs for this symbol should
5503 be discarded. We either want the symbol to remain
5504 undefined, or we have a local definition of some sort.
5505 The "local definition" for non-function symbols may be
5506 due to creating a local definition in .dynbss, and for
5507 function symbols, defining the symbol on the PLT call
5508 stub code. Set non_got_ref here to ensure undef weaks
5509 stay undefined. */
5510 h->non_got_ref = 1;
5511 }
5512 else
5513 {
5514 /* Taking a function's address in a read/write section
5515 doesn't require us to define the function symbol in the
5516 executable on a plt call stub. A dynamic reloc can
5517 be used instead, giving better runtime performance.
5518 (Calls via that function pointer don't need to bounce
5519 through the plt call stub.) Similarly, use a dynamic
5520 reloc for a weak reference when possible, allowing the
5521 resolution of the symbol to be set at load time rather
5522 than link time. */
5523 if ((h->pointer_equality_needed
5524 || (h->non_got_ref
5525 && !h->ref_regular_nonweak
5526 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5527 && !htab->is_vxworks
5528 && !ppc_elf_hash_entry (h)->has_sda_refs
5529 && !readonly_dynrelocs (h))
5530 {
5531 h->pointer_equality_needed = 0;
5532 /* Say that we do want dynamic relocs. */
5533 h->non_got_ref = 0;
5534 /* If we haven't seen a branch reloc then we don't need
5535 a plt entry. */
5536 if (!h->needs_plt)
5537 h->plt.plist = NULL;
5538 }
5539 }
5540 h->protected_def = 0;
5541 /* Function symbols can't have copy relocs. */
5542 return TRUE;
5543 }
5544 else
5545 h->plt.plist = NULL;
5546
5547 /* If this is a weak symbol, and there is a real definition, the
5548 processor independent code will have arranged for us to see the
5549 real definition first, and we can just use the same value. */
5550 if (h->u.weakdef != NULL)
5551 {
5552 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5553 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5554 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5555 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5556 if (ELIMINATE_COPY_RELOCS)
5557 h->non_got_ref = h->u.weakdef->non_got_ref;
5558 return TRUE;
5559 }
5560
5561 /* This is a reference to a symbol defined by a dynamic object which
5562 is not a function. */
5563
5564 /* If we are creating a shared library, we must presume that the
5565 only references to the symbol are via the global offset table.
5566 For such cases we need not do anything here; the relocations will
5567 be handled correctly by relocate_section. */
5568 if (bfd_link_pic (info))
5569 {
5570 h->protected_def = 0;
5571 return TRUE;
5572 }
5573
5574 /* If there are no references to this symbol that do not use the
5575 GOT, we don't need to generate a copy reloc. */
5576 if (!h->non_got_ref)
5577 {
5578 h->protected_def = 0;
5579 return TRUE;
5580 }
5581
5582 /* Protected variables do not work with .dynbss. The copy in
5583 .dynbss won't be used by the shared library with the protected
5584 definition for the variable. Editing to PIC, or text relocations
5585 are preferable to an incorrect program. */
5586 if (h->protected_def)
5587 {
5588 if (ELIMINATE_COPY_RELOCS
5589 && ppc_elf_hash_entry (h)->has_addr16_ha
5590 && ppc_elf_hash_entry (h)->has_addr16_lo
5591 && htab->params->pic_fixup == 0
5592 && info->disable_target_specific_optimizations <= 1)
5593 htab->params->pic_fixup = 1;
5594 h->non_got_ref = 0;
5595 return TRUE;
5596 }
5597
5598 /* If -z nocopyreloc was given, we won't generate them either. */
5599 if (info->nocopyreloc)
5600 {
5601 h->non_got_ref = 0;
5602 return TRUE;
5603 }
5604
5605 /* If we didn't find any dynamic relocs in read-only sections, then
5606 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5607 We can't do this if there are any small data relocations. This
5608 doesn't work on VxWorks, where we can not have dynamic
5609 relocations (other than copy and jump slot relocations) in an
5610 executable. */
5611 if (ELIMINATE_COPY_RELOCS
5612 && !ppc_elf_hash_entry (h)->has_sda_refs
5613 && !htab->is_vxworks
5614 && !h->def_regular
5615 && !readonly_dynrelocs (h))
5616 {
5617 h->non_got_ref = 0;
5618 return TRUE;
5619 }
5620
5621 /* We must allocate the symbol in our .dynbss section, which will
5622 become part of the .bss section of the executable. There will be
5623 an entry for this symbol in the .dynsym section. The dynamic
5624 object will contain position independent code, so all references
5625 from the dynamic object to this symbol will go through the global
5626 offset table. The dynamic linker will use the .dynsym entry to
5627 determine the address it must put in the global offset table, so
5628 both the dynamic object and the regular object will refer to the
5629 same memory location for the variable.
5630
5631 Of course, if the symbol is referenced using SDAREL relocs, we
5632 must instead allocate it in .sbss. */
5633
5634 if (ppc_elf_hash_entry (h)->has_sda_refs)
5635 s = htab->dynsbss;
5636 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5637 s = htab->elf.sdynrelro;
5638 else
5639 s = htab->elf.sdynbss;
5640 BFD_ASSERT (s != NULL);
5641
5642 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5643 copy the initial value out of the dynamic object and into the
5644 runtime process image. We need to remember the offset into the
5645 .rela.bss section we are going to use. */
5646 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5647 {
5648 asection *srel;
5649
5650 if (ppc_elf_hash_entry (h)->has_sda_refs)
5651 srel = htab->relsbss;
5652 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5653 srel = htab->elf.sreldynrelro;
5654 else
5655 srel = htab->elf.srelbss;
5656 BFD_ASSERT (srel != NULL);
5657 srel->size += sizeof (Elf32_External_Rela);
5658 h->needs_copy = 1;
5659 }
5660
5661 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5662 }
5663 \f
5664 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5665 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5666 specifying the addend on the plt relocation. For -fpic code, the sym
5667 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5668 xxxxxxxx.got2.plt_pic32.<callee>. */
5669
5670 static bfd_boolean
5671 add_stub_sym (struct plt_entry *ent,
5672 struct elf_link_hash_entry *h,
5673 struct bfd_link_info *info)
5674 {
5675 struct elf_link_hash_entry *sh;
5676 size_t len1, len2, len3;
5677 char *name;
5678 const char *stub;
5679 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5680
5681 if (bfd_link_pic (info))
5682 stub = ".plt_pic32.";
5683 else
5684 stub = ".plt_call32.";
5685
5686 len1 = strlen (h->root.root.string);
5687 len2 = strlen (stub);
5688 len3 = 0;
5689 if (ent->sec)
5690 len3 = strlen (ent->sec->name);
5691 name = bfd_malloc (len1 + len2 + len3 + 9);
5692 if (name == NULL)
5693 return FALSE;
5694 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5695 if (ent->sec)
5696 memcpy (name + 8, ent->sec->name, len3);
5697 memcpy (name + 8 + len3, stub, len2);
5698 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5699 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5700 if (sh == NULL)
5701 return FALSE;
5702 if (sh->root.type == bfd_link_hash_new)
5703 {
5704 sh->root.type = bfd_link_hash_defined;
5705 sh->root.u.def.section = htab->glink;
5706 sh->root.u.def.value = ent->glink_offset;
5707 sh->ref_regular = 1;
5708 sh->def_regular = 1;
5709 sh->ref_regular_nonweak = 1;
5710 sh->forced_local = 1;
5711 sh->non_elf = 0;
5712 sh->root.linker_def = 1;
5713 }
5714 return TRUE;
5715 }
5716
5717 /* Allocate NEED contiguous space in .got, and return the offset.
5718 Handles allocation of the got header when crossing 32k. */
5719
5720 static bfd_vma
5721 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5722 {
5723 bfd_vma where;
5724 unsigned int max_before_header;
5725
5726 if (htab->plt_type == PLT_VXWORKS)
5727 {
5728 where = htab->elf.sgot->size;
5729 htab->elf.sgot->size += need;
5730 }
5731 else
5732 {
5733 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5734 if (need <= htab->got_gap)
5735 {
5736 where = max_before_header - htab->got_gap;
5737 htab->got_gap -= need;
5738 }
5739 else
5740 {
5741 if (htab->elf.sgot->size + need > max_before_header
5742 && htab->elf.sgot->size <= max_before_header)
5743 {
5744 htab->got_gap = max_before_header - htab->elf.sgot->size;
5745 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5746 }
5747 where = htab->elf.sgot->size;
5748 htab->elf.sgot->size += need;
5749 }
5750 }
5751 return where;
5752 }
5753
5754 /* Calculate size of GOT entries for symbol given its TLS_MASK.
5755 TLS_LD is excluded because those go in a special GOT slot. */
5756
5757 static inline unsigned int
5758 got_entries_needed (int tls_mask)
5759 {
5760 unsigned int need;
5761 if ((tls_mask & TLS_TLS) == 0)
5762 need = 4;
5763 else
5764 {
5765 need = 0;
5766 if ((tls_mask & TLS_GD) != 0)
5767 need += 8;
5768 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5769 need += 4;
5770 if ((tls_mask & TLS_DTPREL) != 0)
5771 need += 4;
5772 }
5773 return need;
5774 }
5775
5776 /* Calculate size of relocs needed for symbol given its TLS_MASK and
5777 NEEDed GOT entries. KNOWN says a TPREL offset can be calculated at
5778 link time. */
5779
5780 static inline unsigned int
5781 got_relocs_needed (int tls_mask, unsigned int need, bfd_boolean known)
5782 {
5783 /* All the entries we allocated need relocs.
5784 Except IE in executable with a local symbol. We could also omit
5785 the DTPREL reloc on the second word of a GD entry under the same
5786 condition as that for IE, but ld.so needs to differentiate
5787 LD and GD entries. */
5788 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0 && known)
5789 need -= 4;
5790 return need * sizeof (Elf32_External_Rela) / 4;
5791 }
5792
5793 /* If H is undefined, make it dynamic if that makes sense. */
5794
5795 static bfd_boolean
5796 ensure_undef_dynamic (struct bfd_link_info *info,
5797 struct elf_link_hash_entry *h)
5798 {
5799 struct elf_link_hash_table *htab = elf_hash_table (info);
5800
5801 if (htab->dynamic_sections_created
5802 && ((info->dynamic_undefined_weak != 0
5803 && h->root.type == bfd_link_hash_undefweak)
5804 || h->root.type == bfd_link_hash_undefined)
5805 && h->dynindx == -1
5806 && !h->forced_local
5807 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5808 return bfd_elf_link_record_dynamic_symbol (info, h);
5809 return TRUE;
5810 }
5811
5812 /* Allocate space in associated reloc sections for dynamic relocs. */
5813
5814 static bfd_boolean
5815 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5816 {
5817 struct bfd_link_info *info = inf;
5818 struct ppc_elf_link_hash_entry *eh;
5819 struct ppc_elf_link_hash_table *htab;
5820 struct elf_dyn_relocs *p;
5821 bfd_boolean dyn;
5822
5823 if (h->root.type == bfd_link_hash_indirect)
5824 return TRUE;
5825
5826 htab = ppc_elf_hash_table (info);
5827 eh = (struct ppc_elf_link_hash_entry *) h;
5828 if (eh->elf.got.refcount > 0
5829 || (ELIMINATE_COPY_RELOCS
5830 && !eh->elf.def_regular
5831 && eh->elf.protected_def
5832 && eh->has_addr16_ha
5833 && eh->has_addr16_lo
5834 && htab->params->pic_fixup > 0))
5835 {
5836 unsigned int need;
5837
5838 /* Make sure this symbol is output as a dynamic symbol. */
5839 if (!ensure_undef_dynamic (info, &eh->elf))
5840 return FALSE;
5841
5842 need = 0;
5843 if ((eh->tls_mask & TLS_LD) != 0)
5844 {
5845 if (!eh->elf.def_dynamic)
5846 /* We'll just use htab->tlsld_got.offset. This should
5847 always be the case. It's a little odd if we have
5848 a local dynamic reloc against a non-local symbol. */
5849 htab->tlsld_got.refcount += 1;
5850 else
5851 need += 8;
5852 }
5853 need += got_entries_needed (eh->tls_mask);
5854 if (need == 0)
5855 eh->elf.got.offset = (bfd_vma) -1;
5856 else
5857 {
5858 eh->elf.got.offset = allocate_got (htab, need);
5859 if ((bfd_link_pic (info)
5860 || (htab->elf.dynamic_sections_created
5861 && eh->elf.dynindx != -1
5862 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
5863 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
5864 {
5865 asection *rsec;
5866 bfd_boolean tprel_known = (bfd_link_executable (info)
5867 && SYMBOL_REFERENCES_LOCAL (info,
5868 &eh->elf));
5869
5870 need = got_relocs_needed (eh->tls_mask, need, tprel_known);
5871 if ((eh->tls_mask & TLS_LD) != 0 && eh->elf.def_dynamic)
5872 need -= sizeof (Elf32_External_Rela);
5873 rsec = htab->elf.srelgot;
5874 if (eh->elf.type == STT_GNU_IFUNC)
5875 rsec = htab->elf.irelplt;
5876 rsec->size += need;
5877 }
5878 }
5879 }
5880 else
5881 eh->elf.got.offset = (bfd_vma) -1;
5882
5883 /* If no dynamic sections we can't have dynamic relocs, except for
5884 IFUNCs which are handled even in static executables. */
5885 if (!htab->elf.dynamic_sections_created
5886 && h->type != STT_GNU_IFUNC)
5887 eh->dyn_relocs = NULL;
5888
5889 if (eh->dyn_relocs == NULL)
5890 ;
5891
5892 /* In the shared -Bsymbolic case, discard space allocated for
5893 dynamic pc-relative relocs against symbols which turn out to be
5894 defined in regular objects. For the normal shared case, discard
5895 space for relocs that have become local due to symbol visibility
5896 changes. */
5897 else if (bfd_link_pic (info))
5898 {
5899 /* Discard relocs on undefined symbols that must be local. */
5900 if (h->root.type == bfd_link_hash_undefined
5901 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5902 eh->dyn_relocs = NULL;
5903
5904 /* Also discard relocs on undefined weak syms with non-default
5905 visibility, or when dynamic_undefined_weak says so. */
5906 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
5907 eh->dyn_relocs = NULL;
5908
5909 /* Relocs that use pc_count are those that appear on a call insn,
5910 or certain REL relocs (see must_be_dyn_reloc) that can be
5911 generated via assembly. We want calls to protected symbols to
5912 resolve directly to the function rather than going via the plt.
5913 If people want function pointer comparisons to work as expected
5914 then they should avoid writing weird assembly. */
5915 else if (SYMBOL_CALLS_LOCAL (info, h))
5916 {
5917 struct elf_dyn_relocs **pp;
5918
5919 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5920 {
5921 p->count -= p->pc_count;
5922 p->pc_count = 0;
5923 if (p->count == 0)
5924 *pp = p->next;
5925 else
5926 pp = &p->next;
5927 }
5928 }
5929
5930 if (htab->is_vxworks)
5931 {
5932 struct elf_dyn_relocs **pp;
5933
5934 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5935 {
5936 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5937 *pp = p->next;
5938 else
5939 pp = &p->next;
5940 }
5941 }
5942
5943 if (eh->dyn_relocs != NULL)
5944 {
5945 /* Make sure this symbol is output as a dynamic symbol. */
5946 if (!ensure_undef_dynamic (info, h))
5947 return FALSE;
5948 }
5949 }
5950 else if (ELIMINATE_COPY_RELOCS)
5951 {
5952 /* For the non-pic case, discard space for relocs against
5953 symbols which turn out to need copy relocs or are not
5954 dynamic. */
5955 if (!h->non_got_ref
5956 && !h->def_regular
5957 && !(h->protected_def
5958 && eh->has_addr16_ha
5959 && eh->has_addr16_lo
5960 && htab->params->pic_fixup > 0))
5961 {
5962 /* Make sure this symbol is output as a dynamic symbol. */
5963 if (!ensure_undef_dynamic (info, h))
5964 return FALSE;
5965
5966 if (h->dynindx == -1)
5967 eh->dyn_relocs = NULL;
5968 }
5969 else
5970 eh->dyn_relocs = NULL;
5971 }
5972
5973 /* Allocate space. */
5974 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5975 {
5976 asection *sreloc = elf_section_data (p->sec)->sreloc;
5977 if (eh->elf.type == STT_GNU_IFUNC)
5978 sreloc = htab->elf.irelplt;
5979 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5980 }
5981
5982 /* Handle PLT relocs. Done last, after dynindx has settled. */
5983 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
5984 if (dyn || h->type == STT_GNU_IFUNC)
5985 {
5986 struct plt_entry *ent;
5987 bfd_boolean doneone = FALSE;
5988 bfd_vma plt_offset = 0, glink_offset = 0;
5989
5990 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5991 if (ent->plt.refcount > 0)
5992 {
5993 asection *s = htab->elf.splt;
5994
5995 if (!dyn)
5996 s = htab->elf.iplt;
5997
5998 if (htab->plt_type == PLT_NEW || !dyn)
5999 {
6000 if (!doneone)
6001 {
6002 plt_offset = s->size;
6003 s->size += 4;
6004 }
6005 ent->plt.offset = plt_offset;
6006
6007 s = htab->glink;
6008 if (!doneone || bfd_link_pic (info))
6009 {
6010 glink_offset = s->size;
6011 s->size += GLINK_ENTRY_SIZE;
6012 if (h == htab->tls_get_addr
6013 && !htab->params->no_tls_get_addr_opt)
6014 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
6015 }
6016 if (!doneone
6017 && !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 = glink_offset;
6023 }
6024 ent->glink_offset = glink_offset;
6025
6026 if (htab->params->emit_stub_syms
6027 && !add_stub_sym (ent, h, info))
6028 return FALSE;
6029 }
6030 else
6031 {
6032 if (!doneone)
6033 {
6034 /* If this is the first .plt entry, make room
6035 for the special first entry. */
6036 if (s->size == 0)
6037 s->size += htab->plt_initial_entry_size;
6038
6039 /* The PowerPC PLT is actually composed of two
6040 parts, the first part is 2 words (for a load
6041 and a jump), and then there is a remaining
6042 word available at the end. */
6043 plt_offset = (htab->plt_initial_entry_size
6044 + (htab->plt_slot_size
6045 * ((s->size
6046 - htab->plt_initial_entry_size)
6047 / htab->plt_entry_size)));
6048
6049 /* If this symbol is not defined in a regular
6050 file, and we are not generating a shared
6051 library, then set the symbol to this location
6052 in the .plt. This is to avoid text
6053 relocations, and is required to make
6054 function pointers compare as equal between
6055 the normal executable and the shared library. */
6056 if (! bfd_link_pic (info)
6057 && h->def_dynamic
6058 && !h->def_regular)
6059 {
6060 h->root.u.def.section = s;
6061 h->root.u.def.value = plt_offset;
6062 }
6063
6064 /* Make room for this entry. */
6065 s->size += htab->plt_entry_size;
6066 /* After the 8192nd entry, room for two entries
6067 is allocated. */
6068 if (htab->plt_type == PLT_OLD
6069 && (s->size - htab->plt_initial_entry_size)
6070 / htab->plt_entry_size
6071 > PLT_NUM_SINGLE_ENTRIES)
6072 s->size += htab->plt_entry_size;
6073 }
6074 ent->plt.offset = plt_offset;
6075 }
6076
6077 /* We also need to make an entry in the .rela.plt section. */
6078 if (!doneone)
6079 {
6080 if (!dyn)
6081 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6082 else
6083 {
6084 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6085
6086 if (htab->plt_type == PLT_VXWORKS)
6087 {
6088 /* Allocate space for the unloaded relocations. */
6089 if (!bfd_link_pic (info)
6090 && htab->elf.dynamic_sections_created)
6091 {
6092 if (ent->plt.offset
6093 == (bfd_vma) htab->plt_initial_entry_size)
6094 {
6095 htab->srelplt2->size
6096 += (sizeof (Elf32_External_Rela)
6097 * VXWORKS_PLTRESOLVE_RELOCS);
6098 }
6099
6100 htab->srelplt2->size
6101 += (sizeof (Elf32_External_Rela)
6102 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6103 }
6104
6105 /* Every PLT entry has an associated GOT entry in
6106 .got.plt. */
6107 htab->elf.sgotplt->size += 4;
6108 }
6109 }
6110 doneone = TRUE;
6111 }
6112 }
6113 else
6114 ent->plt.offset = (bfd_vma) -1;
6115
6116 if (!doneone)
6117 {
6118 h->plt.plist = NULL;
6119 h->needs_plt = 0;
6120 }
6121 }
6122 else
6123 {
6124 h->plt.plist = NULL;
6125 h->needs_plt = 0;
6126 }
6127
6128 return TRUE;
6129 }
6130
6131 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6132 read-only sections. */
6133
6134 static bfd_boolean
6135 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6136 {
6137 asection *sec;
6138
6139 if (h->root.type == bfd_link_hash_indirect)
6140 return TRUE;
6141
6142 sec = readonly_dynrelocs (h);
6143 if (sec != NULL)
6144 {
6145 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
6146
6147 info->flags |= DF_TEXTREL;
6148 info->callbacks->minfo
6149 (_("%B: dynamic relocation in read-only section `%A'\n"),
6150 sec->owner, sec);
6151
6152 /* Not an error, just cut short the traversal. */
6153 return FALSE;
6154 }
6155 return TRUE;
6156 }
6157
6158 static const unsigned char glink_eh_frame_cie[] =
6159 {
6160 0, 0, 0, 16, /* length. */
6161 0, 0, 0, 0, /* id. */
6162 1, /* CIE version. */
6163 'z', 'R', 0, /* Augmentation string. */
6164 4, /* Code alignment. */
6165 0x7c, /* Data alignment. */
6166 65, /* RA reg. */
6167 1, /* Augmentation size. */
6168 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6169 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6170 };
6171
6172 /* Set the sizes of the dynamic sections. */
6173
6174 static bfd_boolean
6175 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6176 struct bfd_link_info *info)
6177 {
6178 struct ppc_elf_link_hash_table *htab;
6179 asection *s;
6180 bfd_boolean relocs;
6181 bfd *ibfd;
6182
6183 #ifdef DEBUG
6184 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6185 #endif
6186
6187 htab = ppc_elf_hash_table (info);
6188 BFD_ASSERT (htab->elf.dynobj != NULL);
6189
6190 if (elf_hash_table (info)->dynamic_sections_created)
6191 {
6192 /* Set the contents of the .interp section to the interpreter. */
6193 if (bfd_link_executable (info) && !info->nointerp)
6194 {
6195 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6196 BFD_ASSERT (s != NULL);
6197 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6198 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6199 }
6200 }
6201
6202 if (htab->plt_type == PLT_OLD)
6203 htab->got_header_size = 16;
6204 else if (htab->plt_type == PLT_NEW)
6205 htab->got_header_size = 12;
6206
6207 /* Set up .got offsets for local syms, and space for local dynamic
6208 relocs. */
6209 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6210 {
6211 bfd_signed_vma *local_got;
6212 bfd_signed_vma *end_local_got;
6213 struct plt_entry **local_plt;
6214 struct plt_entry **end_local_plt;
6215 char *lgot_masks;
6216 bfd_size_type locsymcount;
6217 Elf_Internal_Shdr *symtab_hdr;
6218
6219 if (!is_ppc_elf (ibfd))
6220 continue;
6221
6222 for (s = ibfd->sections; s != NULL; s = s->next)
6223 {
6224 struct ppc_dyn_relocs *p;
6225
6226 for (p = ((struct ppc_dyn_relocs *)
6227 elf_section_data (s)->local_dynrel);
6228 p != NULL;
6229 p = p->next)
6230 {
6231 if (!bfd_is_abs_section (p->sec)
6232 && bfd_is_abs_section (p->sec->output_section))
6233 {
6234 /* Input section has been discarded, either because
6235 it is a copy of a linkonce section or due to
6236 linker script /DISCARD/, so we'll be discarding
6237 the relocs too. */
6238 }
6239 else if (htab->is_vxworks
6240 && strcmp (p->sec->output_section->name,
6241 ".tls_vars") == 0)
6242 {
6243 /* Relocations in vxworks .tls_vars sections are
6244 handled specially by the loader. */
6245 }
6246 else if (p->count != 0)
6247 {
6248 asection *sreloc = elf_section_data (p->sec)->sreloc;
6249 if (p->ifunc)
6250 sreloc = htab->elf.irelplt;
6251 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6252 if ((p->sec->output_section->flags
6253 & (SEC_READONLY | SEC_ALLOC))
6254 == (SEC_READONLY | SEC_ALLOC))
6255 {
6256 info->flags |= DF_TEXTREL;
6257 info->callbacks->minfo (_("%B: dynamic relocation in read-only section `%A'\n"),
6258 p->sec->owner, p->sec);
6259 }
6260 }
6261 }
6262 }
6263
6264 local_got = elf_local_got_refcounts (ibfd);
6265 if (!local_got)
6266 continue;
6267
6268 symtab_hdr = &elf_symtab_hdr (ibfd);
6269 locsymcount = symtab_hdr->sh_info;
6270 end_local_got = local_got + locsymcount;
6271 local_plt = (struct plt_entry **) end_local_got;
6272 end_local_plt = local_plt + locsymcount;
6273 lgot_masks = (char *) end_local_plt;
6274
6275 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6276 if (*local_got > 0)
6277 {
6278 unsigned int need;
6279 if ((*lgot_masks & TLS_LD) != 0)
6280 htab->tlsld_got.refcount += 1;
6281 need = got_entries_needed (*lgot_masks);
6282 if (need == 0)
6283 *local_got = (bfd_vma) -1;
6284 else
6285 {
6286 *local_got = allocate_got (htab, need);
6287 if (bfd_link_pic (info))
6288 {
6289 asection *srel;
6290 bfd_boolean tprel_known = bfd_link_executable (info);
6291
6292 need = got_relocs_needed (*lgot_masks, need, tprel_known);
6293 srel = htab->elf.srelgot;
6294 if ((*lgot_masks & PLT_IFUNC) != 0)
6295 srel = htab->elf.irelplt;
6296 srel->size += need;
6297 }
6298 }
6299 }
6300 else
6301 *local_got = (bfd_vma) -1;
6302
6303 if (htab->is_vxworks)
6304 continue;
6305
6306 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6307 for (; local_plt < end_local_plt; ++local_plt)
6308 {
6309 struct plt_entry *ent;
6310 bfd_boolean doneone = FALSE;
6311 bfd_vma plt_offset = 0, glink_offset = 0;
6312
6313 for (ent = *local_plt; ent != NULL; ent = ent->next)
6314 if (ent->plt.refcount > 0)
6315 {
6316 s = htab->elf.iplt;
6317
6318 if (!doneone)
6319 {
6320 plt_offset = s->size;
6321 s->size += 4;
6322 }
6323 ent->plt.offset = plt_offset;
6324
6325 s = htab->glink;
6326 if (!doneone || bfd_link_pic (info))
6327 {
6328 glink_offset = s->size;
6329 s->size += GLINK_ENTRY_SIZE;
6330 }
6331 ent->glink_offset = glink_offset;
6332
6333 if (!doneone)
6334 {
6335 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6336 doneone = TRUE;
6337 }
6338 }
6339 else
6340 ent->plt.offset = (bfd_vma) -1;
6341 }
6342 }
6343
6344 /* Allocate space for global sym dynamic relocs. */
6345 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6346
6347 if (htab->tlsld_got.refcount > 0)
6348 {
6349 htab->tlsld_got.offset = allocate_got (htab, 8);
6350 if (bfd_link_pic (info))
6351 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6352 }
6353 else
6354 htab->tlsld_got.offset = (bfd_vma) -1;
6355
6356 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6357 {
6358 unsigned int g_o_t = 32768;
6359
6360 /* If we haven't allocated the header, do so now. When we get here,
6361 for old plt/got the got size will be 0 to 32764 (not allocated),
6362 or 32780 to 65536 (header allocated). For new plt/got, the
6363 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6364 if (htab->elf.sgot->size <= 32768)
6365 {
6366 g_o_t = htab->elf.sgot->size;
6367 if (htab->plt_type == PLT_OLD)
6368 g_o_t += 4;
6369 htab->elf.sgot->size += htab->got_header_size;
6370 }
6371
6372 htab->elf.hgot->root.u.def.value = g_o_t;
6373 }
6374 if (bfd_link_pic (info))
6375 {
6376 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6377
6378 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6379 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6380 }
6381 if (info->emitrelocations)
6382 {
6383 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6384
6385 if (sda != NULL && sda->ref_regular)
6386 sda->root.u.def.section->flags |= SEC_KEEP;
6387 sda = htab->sdata[1].sym;
6388 if (sda != NULL && sda->ref_regular)
6389 sda->root.u.def.section->flags |= SEC_KEEP;
6390 }
6391
6392 if (htab->glink != NULL
6393 && htab->glink->size != 0
6394 && htab->elf.dynamic_sections_created)
6395 {
6396 htab->glink_pltresolve = htab->glink->size;
6397 /* Space for the branch table. ??? We don't need entries for
6398 non-dynamic symbols in this table. This case can arise with
6399 static ifuncs or forced local ifuncs. */
6400 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6401 /* Pad out to align the start of PLTresolve. */
6402 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6403 ? 63 : 15);
6404 htab->glink->size += GLINK_PLTRESOLVE;
6405
6406 if (htab->params->emit_stub_syms)
6407 {
6408 struct elf_link_hash_entry *sh;
6409 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6410 TRUE, FALSE, FALSE);
6411 if (sh == NULL)
6412 return FALSE;
6413 if (sh->root.type == bfd_link_hash_new)
6414 {
6415 sh->root.type = bfd_link_hash_defined;
6416 sh->root.u.def.section = htab->glink;
6417 sh->root.u.def.value = htab->glink_pltresolve;
6418 sh->ref_regular = 1;
6419 sh->def_regular = 1;
6420 sh->ref_regular_nonweak = 1;
6421 sh->forced_local = 1;
6422 sh->non_elf = 0;
6423 sh->root.linker_def = 1;
6424 }
6425 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6426 TRUE, FALSE, FALSE);
6427 if (sh == NULL)
6428 return FALSE;
6429 if (sh->root.type == bfd_link_hash_new)
6430 {
6431 sh->root.type = bfd_link_hash_defined;
6432 sh->root.u.def.section = htab->glink;
6433 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6434 sh->ref_regular = 1;
6435 sh->def_regular = 1;
6436 sh->ref_regular_nonweak = 1;
6437 sh->forced_local = 1;
6438 sh->non_elf = 0;
6439 sh->root.linker_def = 1;
6440 }
6441 }
6442 }
6443
6444 if (htab->glink != NULL
6445 && htab->glink->size != 0
6446 && htab->glink_eh_frame != NULL
6447 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6448 && _bfd_elf_eh_frame_present (info))
6449 {
6450 s = htab->glink_eh_frame;
6451 s->size = sizeof (glink_eh_frame_cie) + 20;
6452 if (bfd_link_pic (info))
6453 {
6454 s->size += 4;
6455 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6456 s->size += 4;
6457 }
6458 }
6459
6460 /* We've now determined the sizes of the various dynamic sections.
6461 Allocate memory for them. */
6462 relocs = FALSE;
6463 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6464 {
6465 bfd_boolean strip_section = TRUE;
6466
6467 if ((s->flags & SEC_LINKER_CREATED) == 0)
6468 continue;
6469
6470 if (s == htab->elf.splt
6471 || s == htab->elf.sgot)
6472 {
6473 /* We'd like to strip these sections if they aren't needed, but if
6474 we've exported dynamic symbols from them we must leave them.
6475 It's too late to tell BFD to get rid of the symbols. */
6476 if (htab->elf.hplt != NULL)
6477 strip_section = FALSE;
6478 /* Strip this section if we don't need it; see the
6479 comment below. */
6480 }
6481 else if (s == htab->elf.iplt
6482 || s == htab->glink
6483 || s == htab->glink_eh_frame
6484 || s == htab->elf.sgotplt
6485 || s == htab->sbss
6486 || s == htab->elf.sdynbss
6487 || s == htab->elf.sdynrelro
6488 || s == htab->dynsbss)
6489 {
6490 /* Strip these too. */
6491 }
6492 else if (s == htab->sdata[0].section
6493 || s == htab->sdata[1].section)
6494 {
6495 strip_section = (s->flags & SEC_KEEP) == 0;
6496 }
6497 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6498 ".rela"))
6499 {
6500 if (s->size != 0)
6501 {
6502 /* Remember whether there are any relocation sections. */
6503 relocs = TRUE;
6504
6505 /* We use the reloc_count field as a counter if we need
6506 to copy relocs into the output file. */
6507 s->reloc_count = 0;
6508 }
6509 }
6510 else
6511 {
6512 /* It's not one of our sections, so don't allocate space. */
6513 continue;
6514 }
6515
6516 if (s->size == 0 && strip_section)
6517 {
6518 /* If we don't need this section, strip it from the
6519 output file. This is mostly to handle .rela.bss and
6520 .rela.plt. We must create both sections in
6521 create_dynamic_sections, because they must be created
6522 before the linker maps input sections to output
6523 sections. The linker does that before
6524 adjust_dynamic_symbol is called, and it is that
6525 function which decides whether anything needs to go
6526 into these sections. */
6527 s->flags |= SEC_EXCLUDE;
6528 continue;
6529 }
6530
6531 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6532 continue;
6533
6534 /* Allocate memory for the section contents. */
6535 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6536 if (s->contents == NULL)
6537 return FALSE;
6538 }
6539
6540 if (htab->elf.dynamic_sections_created)
6541 {
6542 /* Add some entries to the .dynamic section. We fill in the
6543 values later, in ppc_elf_finish_dynamic_sections, but we
6544 must add the entries now so that we get the correct size for
6545 the .dynamic section. The DT_DEBUG entry is filled in by the
6546 dynamic linker and used by the debugger. */
6547 #define add_dynamic_entry(TAG, VAL) \
6548 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6549
6550 if (bfd_link_executable (info))
6551 {
6552 if (!add_dynamic_entry (DT_DEBUG, 0))
6553 return FALSE;
6554 }
6555
6556 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6557 {
6558 if (!add_dynamic_entry (DT_PLTGOT, 0)
6559 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6560 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6561 || !add_dynamic_entry (DT_JMPREL, 0))
6562 return FALSE;
6563 }
6564
6565 if (htab->plt_type == PLT_NEW
6566 && htab->glink != NULL
6567 && htab->glink->size != 0)
6568 {
6569 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6570 return FALSE;
6571 if (!htab->params->no_tls_get_addr_opt
6572 && htab->tls_get_addr != NULL
6573 && htab->tls_get_addr->plt.plist != NULL
6574 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6575 return FALSE;
6576 }
6577
6578 if (relocs)
6579 {
6580 if (!add_dynamic_entry (DT_RELA, 0)
6581 || !add_dynamic_entry (DT_RELASZ, 0)
6582 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6583 return FALSE;
6584 }
6585
6586 /* If any dynamic relocs apply to a read-only section, then we
6587 need a DT_TEXTREL entry. */
6588 if ((info->flags & DF_TEXTREL) == 0)
6589 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6590 info);
6591
6592 if ((info->flags & DF_TEXTREL) != 0)
6593 {
6594 if (!add_dynamic_entry (DT_TEXTREL, 0))
6595 return FALSE;
6596 }
6597 if (htab->is_vxworks
6598 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6599 return FALSE;
6600 }
6601 #undef add_dynamic_entry
6602
6603 if (htab->glink_eh_frame != NULL
6604 && htab->glink_eh_frame->contents != NULL)
6605 {
6606 unsigned char *p = htab->glink_eh_frame->contents;
6607 bfd_vma val;
6608
6609 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6610 /* CIE length (rewrite in case little-endian). */
6611 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6612 p += sizeof (glink_eh_frame_cie);
6613 /* FDE length. */
6614 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6615 bfd_put_32 (htab->elf.dynobj, val, p);
6616 p += 4;
6617 /* CIE pointer. */
6618 val = p - htab->glink_eh_frame->contents;
6619 bfd_put_32 (htab->elf.dynobj, val, p);
6620 p += 4;
6621 /* Offset to .glink. Set later. */
6622 p += 4;
6623 /* .glink size. */
6624 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6625 p += 4;
6626 /* Augmentation. */
6627 p += 1;
6628
6629 if (bfd_link_pic (info)
6630 && htab->elf.dynamic_sections_created)
6631 {
6632 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6633 if (adv < 64)
6634 *p++ = DW_CFA_advance_loc + adv;
6635 else if (adv < 256)
6636 {
6637 *p++ = DW_CFA_advance_loc1;
6638 *p++ = adv;
6639 }
6640 else if (adv < 65536)
6641 {
6642 *p++ = DW_CFA_advance_loc2;
6643 bfd_put_16 (htab->elf.dynobj, adv, p);
6644 p += 2;
6645 }
6646 else
6647 {
6648 *p++ = DW_CFA_advance_loc4;
6649 bfd_put_32 (htab->elf.dynobj, adv, p);
6650 p += 4;
6651 }
6652 *p++ = DW_CFA_register;
6653 *p++ = 65;
6654 p++;
6655 *p++ = DW_CFA_advance_loc + 4;
6656 *p++ = DW_CFA_restore_extended;
6657 *p++ = 65;
6658 }
6659 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6660 == htab->glink_eh_frame->size);
6661 }
6662
6663 return TRUE;
6664 }
6665
6666 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6667 if it looks like nothing is using them. */
6668
6669 static void
6670 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6671 {
6672 struct elf_link_hash_entry *sda = lsect->sym;
6673
6674 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6675 {
6676 asection *s;
6677
6678 s = bfd_get_section_by_name (output_bfd, lsect->name);
6679 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6680 {
6681 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6682 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6683 {
6684 sda->def_regular = 0;
6685 /* This is somewhat magic. See elf_link_output_extsym. */
6686 sda->ref_dynamic = 1;
6687 sda->forced_local = 0;
6688 }
6689 }
6690 }
6691 }
6692
6693 void
6694 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6695 {
6696 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6697
6698 if (htab != NULL)
6699 {
6700 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6701 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6702 }
6703 }
6704
6705
6706 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6707
6708 static bfd_boolean
6709 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6710 {
6711 if (h->plt.plist != NULL
6712 && !h->def_regular
6713 && (!h->pointer_equality_needed
6714 || !h->ref_regular_nonweak))
6715 return FALSE;
6716
6717 return _bfd_elf_hash_symbol (h);
6718 }
6719 \f
6720 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6721
6722 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6723 used for some functions that are allowed to break the ABI). */
6724 static const int shared_stub_entry[] =
6725 {
6726 0x7c0802a6, /* mflr 0 */
6727 0x429f0005, /* bcl 20, 31, .Lxxx */
6728 0x7d8802a6, /* mflr 12 */
6729 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6730 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6731 0x7c0803a6, /* mtlr 0 */
6732 0x7d8903a6, /* mtctr 12 */
6733 0x4e800420, /* bctr */
6734 };
6735
6736 static const int stub_entry[] =
6737 {
6738 0x3d800000, /* lis 12,xxx@ha */
6739 0x398c0000, /* addi 12,12,xxx@l */
6740 0x7d8903a6, /* mtctr 12 */
6741 0x4e800420, /* bctr */
6742 };
6743
6744 struct ppc_elf_relax_info
6745 {
6746 unsigned int workaround_size;
6747 unsigned int picfixup_size;
6748 };
6749
6750 /* This function implements long branch trampolines, and the ppc476
6751 icache bug workaround. Any section needing trampolines or patch
6752 space for the workaround has its size extended so that we can
6753 add trampolines at the end of the section. */
6754
6755 static bfd_boolean
6756 ppc_elf_relax_section (bfd *abfd,
6757 asection *isec,
6758 struct bfd_link_info *link_info,
6759 bfd_boolean *again)
6760 {
6761 struct one_branch_fixup
6762 {
6763 struct one_branch_fixup *next;
6764 asection *tsec;
6765 /* Final link, can use the symbol offset. For a
6766 relocatable link we use the symbol's index. */
6767 bfd_vma toff;
6768 bfd_vma trampoff;
6769 };
6770
6771 Elf_Internal_Shdr *symtab_hdr;
6772 bfd_byte *contents = NULL;
6773 Elf_Internal_Sym *isymbuf = NULL;
6774 Elf_Internal_Rela *internal_relocs = NULL;
6775 Elf_Internal_Rela *irel, *irelend = NULL;
6776 struct one_branch_fixup *branch_fixups = NULL;
6777 struct ppc_elf_relax_info *relax_info = NULL;
6778 unsigned changes = 0;
6779 bfd_boolean workaround_change;
6780 struct ppc_elf_link_hash_table *htab;
6781 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6782 asection *got2;
6783 bfd_boolean maybe_pasted;
6784
6785 *again = FALSE;
6786
6787 /* No need to do anything with non-alloc or non-code sections. */
6788 if ((isec->flags & SEC_ALLOC) == 0
6789 || (isec->flags & SEC_CODE) == 0
6790 || (isec->flags & SEC_LINKER_CREATED) != 0
6791 || isec->size < 4)
6792 return TRUE;
6793
6794 /* We cannot represent the required PIC relocs in the output, so don't
6795 do anything. The linker doesn't support mixing -shared and -r
6796 anyway. */
6797 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6798 return TRUE;
6799
6800 htab = ppc_elf_hash_table (link_info);
6801 if (htab == NULL)
6802 return TRUE;
6803
6804 isec->size = (isec->size + 3) & -4;
6805 if (isec->rawsize == 0)
6806 isec->rawsize = isec->size;
6807 trampbase = isec->size;
6808
6809 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6810 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6811 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6812
6813 if (htab->params->ppc476_workaround
6814 || htab->params->pic_fixup > 0)
6815 {
6816 if (elf_section_data (isec)->sec_info == NULL)
6817 {
6818 elf_section_data (isec)->sec_info
6819 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6820 if (elf_section_data (isec)->sec_info == NULL)
6821 return FALSE;
6822 }
6823 relax_info = elf_section_data (isec)->sec_info;
6824 trampbase -= relax_info->workaround_size;
6825 }
6826
6827 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6828 || strcmp (isec->output_section->name, ".fini") == 0);
6829 /* Space for a branch around any trampolines. */
6830 trampoff = trampbase;
6831 if (maybe_pasted && trampbase == isec->rawsize)
6832 trampoff += 4;
6833
6834 symtab_hdr = &elf_symtab_hdr (abfd);
6835 picfixup_size = 0;
6836 if (htab->params->branch_trampolines
6837 || htab->params->pic_fixup > 0)
6838 {
6839 /* Get a copy of the native relocations. */
6840 if (isec->reloc_count != 0)
6841 {
6842 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6843 link_info->keep_memory);
6844 if (internal_relocs == NULL)
6845 goto error_return;
6846 }
6847
6848 got2 = bfd_get_section_by_name (abfd, ".got2");
6849
6850 irelend = internal_relocs + isec->reloc_count;
6851 for (irel = internal_relocs; irel < irelend; irel++)
6852 {
6853 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6854 bfd_vma toff, roff;
6855 asection *tsec;
6856 struct one_branch_fixup *f;
6857 size_t insn_offset = 0;
6858 bfd_vma max_branch_offset = 0, val;
6859 bfd_byte *hit_addr;
6860 unsigned long t0;
6861 struct elf_link_hash_entry *h;
6862 struct plt_entry **plist;
6863 unsigned char sym_type;
6864
6865 switch (r_type)
6866 {
6867 case R_PPC_REL24:
6868 case R_PPC_LOCAL24PC:
6869 case R_PPC_PLTREL24:
6870 max_branch_offset = 1 << 25;
6871 break;
6872
6873 case R_PPC_REL14:
6874 case R_PPC_REL14_BRTAKEN:
6875 case R_PPC_REL14_BRNTAKEN:
6876 max_branch_offset = 1 << 15;
6877 break;
6878
6879 case R_PPC_ADDR16_HA:
6880 if (htab->params->pic_fixup > 0)
6881 break;
6882 continue;
6883
6884 default:
6885 continue;
6886 }
6887
6888 /* Get the value of the symbol referred to by the reloc. */
6889 h = NULL;
6890 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6891 {
6892 /* A local symbol. */
6893 Elf_Internal_Sym *isym;
6894
6895 /* Read this BFD's local symbols. */
6896 if (isymbuf == NULL)
6897 {
6898 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6899 if (isymbuf == NULL)
6900 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6901 symtab_hdr->sh_info, 0,
6902 NULL, NULL, NULL);
6903 if (isymbuf == 0)
6904 goto error_return;
6905 }
6906 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6907 if (isym->st_shndx == SHN_UNDEF)
6908 tsec = bfd_und_section_ptr;
6909 else if (isym->st_shndx == SHN_ABS)
6910 tsec = bfd_abs_section_ptr;
6911 else if (isym->st_shndx == SHN_COMMON)
6912 tsec = bfd_com_section_ptr;
6913 else
6914 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6915
6916 toff = isym->st_value;
6917 sym_type = ELF_ST_TYPE (isym->st_info);
6918 }
6919 else
6920 {
6921 /* Global symbol handling. */
6922 unsigned long indx;
6923
6924 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6925 h = elf_sym_hashes (abfd)[indx];
6926
6927 while (h->root.type == bfd_link_hash_indirect
6928 || h->root.type == bfd_link_hash_warning)
6929 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6930
6931 if (h->root.type == bfd_link_hash_defined
6932 || h->root.type == bfd_link_hash_defweak)
6933 {
6934 tsec = h->root.u.def.section;
6935 toff = h->root.u.def.value;
6936 }
6937 else if (h->root.type == bfd_link_hash_undefined
6938 || h->root.type == bfd_link_hash_undefweak)
6939 {
6940 tsec = bfd_und_section_ptr;
6941 toff = bfd_link_relocatable (link_info) ? indx : 0;
6942 }
6943 else
6944 continue;
6945
6946 /* If this branch is to __tls_get_addr then we may later
6947 optimise away the call. We won't be needing a long-
6948 branch stub in that case. */
6949 if (bfd_link_executable (link_info)
6950 && h == htab->tls_get_addr
6951 && irel != internal_relocs)
6952 {
6953 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6954 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6955 unsigned int tls_mask = 0;
6956
6957 /* The previous reloc should be one of R_PPC_TLSGD or
6958 R_PPC_TLSLD, or for older object files, a reloc
6959 on the __tls_get_addr arg setup insn. Get tls
6960 mask bits from the symbol on that reloc. */
6961 if (t_symndx < symtab_hdr->sh_info)
6962 {
6963 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6964
6965 if (local_got_offsets != NULL)
6966 {
6967 struct plt_entry **local_plt = (struct plt_entry **)
6968 (local_got_offsets + symtab_hdr->sh_info);
6969 char *lgot_masks = (char *)
6970 (local_plt + symtab_hdr->sh_info);
6971 tls_mask = lgot_masks[t_symndx];
6972 }
6973 }
6974 else
6975 {
6976 struct elf_link_hash_entry *th
6977 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6978
6979 while (th->root.type == bfd_link_hash_indirect
6980 || th->root.type == bfd_link_hash_warning)
6981 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6982
6983 tls_mask
6984 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6985 }
6986
6987 /* The mask bits tell us if the call will be
6988 optimised away. */
6989 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6990 && (t_rtype == R_PPC_TLSGD
6991 || t_rtype == R_PPC_GOT_TLSGD16
6992 || t_rtype == R_PPC_GOT_TLSGD16_LO))
6993 continue;
6994 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
6995 && (t_rtype == R_PPC_TLSLD
6996 || t_rtype == R_PPC_GOT_TLSLD16
6997 || t_rtype == R_PPC_GOT_TLSLD16_LO))
6998 continue;
6999 }
7000
7001 sym_type = h->type;
7002 }
7003
7004 if (r_type == R_PPC_ADDR16_HA)
7005 {
7006 if (h != NULL
7007 && !h->def_regular
7008 && h->protected_def
7009 && ppc_elf_hash_entry (h)->has_addr16_ha
7010 && ppc_elf_hash_entry (h)->has_addr16_lo)
7011 picfixup_size += 12;
7012 continue;
7013 }
7014
7015 /* The condition here under which we call find_plt_ent must
7016 match that in relocate_section. If we call find_plt_ent here
7017 but not in relocate_section, or vice versa, then the branch
7018 destination used here may be incorrect. */
7019 plist = NULL;
7020 if (h != NULL)
7021 {
7022 /* We know is_branch_reloc (r_type) is true. */
7023 if (h->type == STT_GNU_IFUNC
7024 || r_type == R_PPC_PLTREL24)
7025 plist = &h->plt.plist;
7026 }
7027 else if (sym_type == STT_GNU_IFUNC
7028 && elf_local_got_offsets (abfd) != NULL)
7029 {
7030 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7031 struct plt_entry **local_plt = (struct plt_entry **)
7032 (local_got_offsets + symtab_hdr->sh_info);
7033 plist = local_plt + ELF32_R_SYM (irel->r_info);
7034 }
7035 if (plist != NULL)
7036 {
7037 bfd_vma addend = 0;
7038 struct plt_entry *ent;
7039
7040 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7041 addend = irel->r_addend;
7042 ent = find_plt_ent (plist, got2, addend);
7043 if (ent != NULL)
7044 {
7045 if (htab->plt_type == PLT_NEW
7046 || h == NULL
7047 || !htab->elf.dynamic_sections_created
7048 || h->dynindx == -1)
7049 {
7050 tsec = htab->glink;
7051 toff = ent->glink_offset;
7052 }
7053 else
7054 {
7055 tsec = htab->elf.splt;
7056 toff = ent->plt.offset;
7057 }
7058 }
7059 }
7060
7061 /* If the branch and target are in the same section, you have
7062 no hope of adding stubs. We'll error out later should the
7063 branch overflow. */
7064 if (tsec == isec)
7065 continue;
7066
7067 /* There probably isn't any reason to handle symbols in
7068 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7069 attribute for a code section, and we are only looking at
7070 branches. However, implement it correctly here as a
7071 reference for other target relax_section functions. */
7072 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7073 {
7074 /* At this stage in linking, no SEC_MERGE symbol has been
7075 adjusted, so all references to such symbols need to be
7076 passed through _bfd_merged_section_offset. (Later, in
7077 relocate_section, all SEC_MERGE symbols *except* for
7078 section symbols have been adjusted.)
7079
7080 gas may reduce relocations against symbols in SEC_MERGE
7081 sections to a relocation against the section symbol when
7082 the original addend was zero. When the reloc is against
7083 a section symbol we should include the addend in the
7084 offset passed to _bfd_merged_section_offset, since the
7085 location of interest is the original symbol. On the
7086 other hand, an access to "sym+addend" where "sym" is not
7087 a section symbol should not include the addend; Such an
7088 access is presumed to be an offset from "sym"; The
7089 location of interest is just "sym". */
7090 if (sym_type == STT_SECTION)
7091 toff += irel->r_addend;
7092
7093 toff
7094 = _bfd_merged_section_offset (abfd, &tsec,
7095 elf_section_data (tsec)->sec_info,
7096 toff);
7097
7098 if (sym_type != STT_SECTION)
7099 toff += irel->r_addend;
7100 }
7101 /* PLTREL24 addends are special. */
7102 else if (r_type != R_PPC_PLTREL24)
7103 toff += irel->r_addend;
7104
7105 /* Attempted -shared link of non-pic code loses. */
7106 if ((!bfd_link_relocatable (link_info)
7107 && tsec == bfd_und_section_ptr)
7108 || tsec->output_section == NULL
7109 || (tsec->owner != NULL
7110 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7111 continue;
7112
7113 roff = irel->r_offset;
7114
7115 /* If the branch is in range, no need to do anything. */
7116 if (tsec != bfd_und_section_ptr
7117 && (!bfd_link_relocatable (link_info)
7118 /* A relocatable link may have sections moved during
7119 final link, so do not presume they remain in range. */
7120 || tsec->output_section == isec->output_section))
7121 {
7122 bfd_vma symaddr, reladdr;
7123
7124 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7125 reladdr = isec->output_section->vma + isec->output_offset + roff;
7126 if (symaddr - reladdr + max_branch_offset
7127 < 2 * max_branch_offset)
7128 continue;
7129 }
7130
7131 /* Look for an existing fixup to this address. */
7132 for (f = branch_fixups; f ; f = f->next)
7133 if (f->tsec == tsec && f->toff == toff)
7134 break;
7135
7136 if (f == NULL)
7137 {
7138 size_t size;
7139 unsigned long stub_rtype;
7140
7141 val = trampoff - roff;
7142 if (val >= max_branch_offset)
7143 /* Oh dear, we can't reach a trampoline. Don't try to add
7144 one. We'll report an error later. */
7145 continue;
7146
7147 if (bfd_link_pic (link_info))
7148 {
7149 size = 4 * ARRAY_SIZE (shared_stub_entry);
7150 insn_offset = 12;
7151 }
7152 else
7153 {
7154 size = 4 * ARRAY_SIZE (stub_entry);
7155 insn_offset = 0;
7156 }
7157 stub_rtype = R_PPC_RELAX;
7158 if (tsec == htab->elf.splt
7159 || tsec == htab->glink)
7160 {
7161 stub_rtype = R_PPC_RELAX_PLT;
7162 if (r_type == R_PPC_PLTREL24)
7163 stub_rtype = R_PPC_RELAX_PLTREL24;
7164 }
7165
7166 /* Hijack the old relocation. Since we need two
7167 relocations for this use a "composite" reloc. */
7168 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7169 stub_rtype);
7170 irel->r_offset = trampoff + insn_offset;
7171 if (r_type == R_PPC_PLTREL24
7172 && stub_rtype != R_PPC_RELAX_PLTREL24)
7173 irel->r_addend = 0;
7174
7175 /* Record the fixup so we don't do it again this section. */
7176 f = bfd_malloc (sizeof (*f));
7177 f->next = branch_fixups;
7178 f->tsec = tsec;
7179 f->toff = toff;
7180 f->trampoff = trampoff;
7181 branch_fixups = f;
7182
7183 trampoff += size;
7184 changes++;
7185 }
7186 else
7187 {
7188 val = f->trampoff - roff;
7189 if (val >= max_branch_offset)
7190 continue;
7191
7192 /* Nop out the reloc, since we're finalizing things here. */
7193 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7194 }
7195
7196 /* Get the section contents. */
7197 if (contents == NULL)
7198 {
7199 /* Get cached copy if it exists. */
7200 if (elf_section_data (isec)->this_hdr.contents != NULL)
7201 contents = elf_section_data (isec)->this_hdr.contents;
7202 /* Go get them off disk. */
7203 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7204 goto error_return;
7205 }
7206
7207 /* Fix up the existing branch to hit the trampoline. */
7208 hit_addr = contents + roff;
7209 switch (r_type)
7210 {
7211 case R_PPC_REL24:
7212 case R_PPC_LOCAL24PC:
7213 case R_PPC_PLTREL24:
7214 t0 = bfd_get_32 (abfd, hit_addr);
7215 t0 &= ~0x3fffffc;
7216 t0 |= val & 0x3fffffc;
7217 bfd_put_32 (abfd, t0, hit_addr);
7218 break;
7219
7220 case R_PPC_REL14:
7221 case R_PPC_REL14_BRTAKEN:
7222 case R_PPC_REL14_BRNTAKEN:
7223 t0 = bfd_get_32 (abfd, hit_addr);
7224 t0 &= ~0xfffc;
7225 t0 |= val & 0xfffc;
7226 bfd_put_32 (abfd, t0, hit_addr);
7227 break;
7228 }
7229 }
7230
7231 while (branch_fixups != NULL)
7232 {
7233 struct one_branch_fixup *f = branch_fixups;
7234 branch_fixups = branch_fixups->next;
7235 free (f);
7236 }
7237 }
7238
7239 workaround_change = FALSE;
7240 newsize = trampoff;
7241 if (htab->params->ppc476_workaround
7242 && (!bfd_link_relocatable (link_info)
7243 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7244 {
7245 bfd_vma addr, end_addr;
7246 unsigned int crossings;
7247 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7248
7249 addr = isec->output_section->vma + isec->output_offset;
7250 end_addr = addr + trampoff;
7251 addr &= -pagesize;
7252 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7253 if (crossings != 0)
7254 {
7255 /* Keep space aligned, to ensure the patch code itself does
7256 not cross a page. Don't decrease size calculated on a
7257 previous pass as otherwise we might never settle on a layout. */
7258 newsize = 15 - ((end_addr - 1) & 15);
7259 newsize += crossings * 16;
7260 if (relax_info->workaround_size < newsize)
7261 {
7262 relax_info->workaround_size = newsize;
7263 workaround_change = TRUE;
7264 }
7265 /* Ensure relocate_section is called. */
7266 isec->flags |= SEC_RELOC;
7267 }
7268 newsize = trampoff + relax_info->workaround_size;
7269 }
7270
7271 if (htab->params->pic_fixup > 0)
7272 {
7273 picfixup_size -= relax_info->picfixup_size;
7274 if (picfixup_size != 0)
7275 relax_info->picfixup_size += picfixup_size;
7276 newsize += relax_info->picfixup_size;
7277 }
7278
7279 if (changes != 0 || picfixup_size != 0 || workaround_change)
7280 isec->size = newsize;
7281
7282 if (isymbuf != NULL
7283 && symtab_hdr->contents != (unsigned char *) isymbuf)
7284 {
7285 if (! link_info->keep_memory)
7286 free (isymbuf);
7287 else
7288 {
7289 /* Cache the symbols for elf_link_input_bfd. */
7290 symtab_hdr->contents = (unsigned char *) isymbuf;
7291 }
7292 }
7293
7294 if (contents != NULL
7295 && elf_section_data (isec)->this_hdr.contents != contents)
7296 {
7297 if (!changes && !link_info->keep_memory)
7298 free (contents);
7299 else
7300 {
7301 /* Cache the section contents for elf_link_input_bfd. */
7302 elf_section_data (isec)->this_hdr.contents = contents;
7303 }
7304 }
7305
7306 changes += picfixup_size;
7307 if (changes != 0)
7308 {
7309 /* Append sufficient NOP relocs so we can write out relocation
7310 information for the trampolines. */
7311 Elf_Internal_Shdr *rel_hdr;
7312 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7313 * sizeof (*new_relocs));
7314 unsigned ix;
7315
7316 if (!new_relocs)
7317 goto error_return;
7318 memcpy (new_relocs, internal_relocs,
7319 isec->reloc_count * sizeof (*new_relocs));
7320 for (ix = changes; ix--;)
7321 {
7322 irel = new_relocs + ix + isec->reloc_count;
7323
7324 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7325 }
7326 if (internal_relocs != elf_section_data (isec)->relocs)
7327 free (internal_relocs);
7328 elf_section_data (isec)->relocs = new_relocs;
7329 isec->reloc_count += changes;
7330 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7331 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7332 }
7333 else if (internal_relocs != NULL
7334 && elf_section_data (isec)->relocs != internal_relocs)
7335 free (internal_relocs);
7336
7337 *again = changes != 0 || workaround_change;
7338 return TRUE;
7339
7340 error_return:
7341 while (branch_fixups != NULL)
7342 {
7343 struct one_branch_fixup *f = branch_fixups;
7344 branch_fixups = branch_fixups->next;
7345 free (f);
7346 }
7347 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7348 free (isymbuf);
7349 if (contents != NULL
7350 && elf_section_data (isec)->this_hdr.contents != contents)
7351 free (contents);
7352 if (internal_relocs != NULL
7353 && elf_section_data (isec)->relocs != internal_relocs)
7354 free (internal_relocs);
7355 return FALSE;
7356 }
7357 \f
7358 /* What to do when ld finds relocations against symbols defined in
7359 discarded sections. */
7360
7361 static unsigned int
7362 ppc_elf_action_discarded (asection *sec)
7363 {
7364 if (strcmp (".fixup", sec->name) == 0)
7365 return 0;
7366
7367 if (strcmp (".got2", sec->name) == 0)
7368 return 0;
7369
7370 return _bfd_elf_default_action_discarded (sec);
7371 }
7372 \f
7373 /* Fill in the address for a pointer generated in a linker section. */
7374
7375 static bfd_vma
7376 elf_finish_pointer_linker_section (bfd *input_bfd,
7377 elf_linker_section_t *lsect,
7378 struct elf_link_hash_entry *h,
7379 bfd_vma relocation,
7380 const Elf_Internal_Rela *rel)
7381 {
7382 elf_linker_section_pointers_t *linker_section_ptr;
7383
7384 BFD_ASSERT (lsect != NULL);
7385
7386 if (h != NULL)
7387 {
7388 /* Handle global symbol. */
7389 struct ppc_elf_link_hash_entry *eh;
7390
7391 eh = (struct ppc_elf_link_hash_entry *) h;
7392 BFD_ASSERT (eh->elf.def_regular);
7393 linker_section_ptr = eh->linker_section_pointer;
7394 }
7395 else
7396 {
7397 /* Handle local symbol. */
7398 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7399
7400 BFD_ASSERT (is_ppc_elf (input_bfd));
7401 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7402 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7403 }
7404
7405 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7406 rel->r_addend,
7407 lsect);
7408 BFD_ASSERT (linker_section_ptr != NULL);
7409
7410 /* Offset will always be a multiple of four, so use the bottom bit
7411 as a "written" flag. */
7412 if ((linker_section_ptr->offset & 1) == 0)
7413 {
7414 bfd_put_32 (lsect->section->owner,
7415 relocation + linker_section_ptr->addend,
7416 lsect->section->contents + linker_section_ptr->offset);
7417 linker_section_ptr->offset += 1;
7418 }
7419
7420 relocation = (lsect->section->output_section->vma
7421 + lsect->section->output_offset
7422 + linker_section_ptr->offset - 1
7423 - SYM_VAL (lsect->sym));
7424
7425 #ifdef DEBUG
7426 fprintf (stderr,
7427 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7428 lsect->name, (long) relocation, (long) relocation);
7429 #endif
7430
7431 return relocation;
7432 }
7433
7434 #define PPC_LO(v) ((v) & 0xffff)
7435 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7436 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7437
7438 static void
7439 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7440 struct bfd_link_info *info)
7441 {
7442 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7443 bfd *output_bfd = info->output_bfd;
7444 bfd_vma plt;
7445
7446 plt = ((ent->plt.offset & ~1)
7447 + plt_sec->output_section->vma
7448 + plt_sec->output_offset);
7449
7450 if (bfd_link_pic (info))
7451 {
7452 bfd_vma got = 0;
7453
7454 if (ent->addend >= 32768)
7455 got = (ent->addend
7456 + ent->sec->output_section->vma
7457 + ent->sec->output_offset);
7458 else if (htab->elf.hgot != NULL)
7459 got = SYM_VAL (htab->elf.hgot);
7460
7461 plt -= got;
7462
7463 if (plt + 0x8000 < 0x10000)
7464 {
7465 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7466 p += 4;
7467 bfd_put_32 (output_bfd, MTCTR_11, p);
7468 p += 4;
7469 bfd_put_32 (output_bfd, BCTR, p);
7470 p += 4;
7471 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7472 p += 4;
7473 }
7474 else
7475 {
7476 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7477 p += 4;
7478 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7479 p += 4;
7480 bfd_put_32 (output_bfd, MTCTR_11, p);
7481 p += 4;
7482 bfd_put_32 (output_bfd, BCTR, p);
7483 p += 4;
7484 }
7485 }
7486 else
7487 {
7488 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7489 p += 4;
7490 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7491 p += 4;
7492 bfd_put_32 (output_bfd, MTCTR_11, p);
7493 p += 4;
7494 bfd_put_32 (output_bfd, BCTR, p);
7495 p += 4;
7496 }
7497 }
7498
7499 /* Return true if symbol is defined statically. */
7500
7501 static bfd_boolean
7502 is_static_defined (struct elf_link_hash_entry *h)
7503 {
7504 return ((h->root.type == bfd_link_hash_defined
7505 || h->root.type == bfd_link_hash_defweak)
7506 && h->root.u.def.section != NULL
7507 && h->root.u.def.section->output_section != NULL);
7508 }
7509
7510 /* If INSN is an opcode that may be used with an @tls operand, return
7511 the transformed insn for TLS optimisation, otherwise return 0. If
7512 REG is non-zero only match an insn with RB or RA equal to REG. */
7513
7514 unsigned int
7515 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7516 {
7517 unsigned int rtra;
7518
7519 if ((insn & (0x3f << 26)) != 31 << 26)
7520 return 0;
7521
7522 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7523 rtra = insn & ((1 << 26) - (1 << 16));
7524 else if (((insn >> 16) & 0x1f) == reg)
7525 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7526 else
7527 return 0;
7528
7529 if ((insn & (0x3ff << 1)) == 266 << 1)
7530 /* add -> addi. */
7531 insn = 14 << 26;
7532 else if ((insn & (0x1f << 1)) == 23 << 1
7533 && ((insn & (0x1f << 6)) < 14 << 6
7534 || ((insn & (0x1f << 6)) >= 16 << 6
7535 && (insn & (0x1f << 6)) < 24 << 6)))
7536 /* load and store indexed -> dform. */
7537 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7538 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7539 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7540 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7541 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7542 /* lwax -> lwa. */
7543 insn = (58 << 26) | 2;
7544 else
7545 return 0;
7546 insn |= rtra;
7547 return insn;
7548 }
7549
7550 /* If INSN is an opcode that may be used with an @tprel operand, return
7551 the transformed insn for an undefined weak symbol, ie. with the
7552 thread pointer REG operand removed. Otherwise return 0. */
7553
7554 unsigned int
7555 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7556 {
7557 if ((insn & (0x1f << 16)) == reg << 16
7558 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7559 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7560 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7561 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7562 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7563 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7564 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7565 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7566 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7567 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7568 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7569 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7570 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7571 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7572 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7573 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7574 && (insn & 3) != 1)
7575 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7576 && ((insn & 3) == 0 || (insn & 3) == 3))))
7577 {
7578 insn &= ~(0x1f << 16);
7579 }
7580 else if ((insn & (0x1f << 21)) == reg << 21
7581 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7582 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7583 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7584 {
7585 insn &= ~(0x1f << 21);
7586 insn |= (insn & (0x1f << 16)) << 5;
7587 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7588 insn -= 2 >> 26; /* convert to ori,oris */
7589 }
7590 else
7591 insn = 0;
7592 return insn;
7593 }
7594
7595 static bfd_boolean
7596 is_insn_ds_form (unsigned int insn)
7597 {
7598 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7599 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7600 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7601 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7602 }
7603
7604 static bfd_boolean
7605 is_insn_dq_form (unsigned int insn)
7606 {
7607 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7608 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7609 && (insn & 3) == 1));
7610 }
7611
7612 /* The RELOCATE_SECTION function is called by the ELF backend linker
7613 to handle the relocations for a section.
7614
7615 The relocs are always passed as Rela structures; if the section
7616 actually uses Rel structures, the r_addend field will always be
7617 zero.
7618
7619 This function is responsible for adjust the section contents as
7620 necessary, and (if using Rela relocs and generating a
7621 relocatable output file) adjusting the reloc addend as
7622 necessary.
7623
7624 This function does not have to worry about setting the reloc
7625 address or the reloc symbol index.
7626
7627 LOCAL_SYMS is a pointer to the swapped in local symbols.
7628
7629 LOCAL_SECTIONS is an array giving the section in the input file
7630 corresponding to the st_shndx field of each local symbol.
7631
7632 The global hash table entry for the global symbols can be found
7633 via elf_sym_hashes (input_bfd).
7634
7635 When generating relocatable output, this function must handle
7636 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7637 going to be the section symbol corresponding to the output
7638 section, which means that the addend must be adjusted
7639 accordingly. */
7640
7641 static bfd_boolean
7642 ppc_elf_relocate_section (bfd *output_bfd,
7643 struct bfd_link_info *info,
7644 bfd *input_bfd,
7645 asection *input_section,
7646 bfd_byte *contents,
7647 Elf_Internal_Rela *relocs,
7648 Elf_Internal_Sym *local_syms,
7649 asection **local_sections)
7650 {
7651 Elf_Internal_Shdr *symtab_hdr;
7652 struct elf_link_hash_entry **sym_hashes;
7653 struct ppc_elf_link_hash_table *htab;
7654 Elf_Internal_Rela *rel;
7655 Elf_Internal_Rela *wrel;
7656 Elf_Internal_Rela *relend;
7657 Elf_Internal_Rela outrel;
7658 asection *got2;
7659 bfd_vma *local_got_offsets;
7660 bfd_boolean ret = TRUE;
7661 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7662 bfd_boolean is_vxworks_tls;
7663 unsigned int picfixup_size = 0;
7664 struct ppc_elf_relax_info *relax_info = NULL;
7665
7666 #ifdef DEBUG
7667 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7668 "%ld relocations%s",
7669 input_bfd, input_section,
7670 (long) input_section->reloc_count,
7671 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7672 #endif
7673
7674 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7675
7676 /* Initialize howto table if not already done. */
7677 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7678 ppc_elf_howto_init ();
7679
7680 htab = ppc_elf_hash_table (info);
7681 local_got_offsets = elf_local_got_offsets (input_bfd);
7682 symtab_hdr = &elf_symtab_hdr (input_bfd);
7683 sym_hashes = elf_sym_hashes (input_bfd);
7684 /* We have to handle relocations in vxworks .tls_vars sections
7685 specially, because the dynamic loader is 'weird'. */
7686 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7687 && !strcmp (input_section->output_section->name,
7688 ".tls_vars"));
7689 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7690 relax_info = elf_section_data (input_section)->sec_info;
7691 rel = wrel = relocs;
7692 relend = relocs + input_section->reloc_count;
7693 for (; rel < relend; wrel++, rel++)
7694 {
7695 enum elf_ppc_reloc_type r_type;
7696 bfd_vma addend;
7697 bfd_reloc_status_type r;
7698 Elf_Internal_Sym *sym;
7699 asection *sec;
7700 struct elf_link_hash_entry *h;
7701 const char *sym_name;
7702 reloc_howto_type *howto;
7703 unsigned long r_symndx;
7704 bfd_vma relocation;
7705 bfd_vma branch_bit, from;
7706 bfd_boolean unresolved_reloc;
7707 bfd_boolean warned;
7708 unsigned int tls_type, tls_mask, tls_gd;
7709 struct plt_entry **ifunc;
7710 struct reloc_howto_struct alt_howto;
7711
7712 again:
7713 r_type = ELF32_R_TYPE (rel->r_info);
7714 sym = NULL;
7715 sec = NULL;
7716 h = NULL;
7717 unresolved_reloc = FALSE;
7718 warned = FALSE;
7719 r_symndx = ELF32_R_SYM (rel->r_info);
7720
7721 if (r_symndx < symtab_hdr->sh_info)
7722 {
7723 sym = local_syms + r_symndx;
7724 sec = local_sections[r_symndx];
7725 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7726
7727 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7728 }
7729 else
7730 {
7731 bfd_boolean ignored;
7732
7733 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7734 r_symndx, symtab_hdr, sym_hashes,
7735 h, sec, relocation,
7736 unresolved_reloc, warned, ignored);
7737
7738 sym_name = h->root.root.string;
7739 }
7740
7741 if (sec != NULL && discarded_section (sec))
7742 {
7743 /* For relocs against symbols from removed linkonce sections,
7744 or sections discarded by a linker script, we just want the
7745 section contents zeroed. Avoid any special processing. */
7746 howto = NULL;
7747 if (r_type < R_PPC_max)
7748 howto = ppc_elf_howto_table[r_type];
7749
7750 _bfd_clear_contents (howto, input_bfd, input_section,
7751 contents + rel->r_offset);
7752 wrel->r_offset = rel->r_offset;
7753 wrel->r_info = 0;
7754 wrel->r_addend = 0;
7755
7756 /* For ld -r, remove relocations in debug sections against
7757 symbols defined in discarded sections. Not done for
7758 non-debug to preserve relocs in .eh_frame which the
7759 eh_frame editing code expects to be present. */
7760 if (bfd_link_relocatable (info)
7761 && (input_section->flags & SEC_DEBUGGING))
7762 wrel--;
7763
7764 continue;
7765 }
7766
7767 if (bfd_link_relocatable (info))
7768 {
7769 if (got2 != NULL
7770 && r_type == R_PPC_PLTREL24
7771 && rel->r_addend != 0)
7772 {
7773 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7774 addend specifies the GOT pointer offset within .got2. */
7775 rel->r_addend += got2->output_offset;
7776 }
7777 if (r_type != R_PPC_RELAX_PLT
7778 && r_type != R_PPC_RELAX_PLTREL24
7779 && r_type != R_PPC_RELAX)
7780 goto copy_reloc;
7781 }
7782
7783 /* TLS optimizations. Replace instruction sequences and relocs
7784 based on information we collected in tls_optimize. We edit
7785 RELOCS so that --emit-relocs will output something sensible
7786 for the final instruction stream. */
7787 tls_mask = 0;
7788 tls_gd = 0;
7789 if (h != NULL)
7790 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7791 else if (local_got_offsets != NULL)
7792 {
7793 struct plt_entry **local_plt;
7794 char *lgot_masks;
7795 local_plt
7796 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7797 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7798 tls_mask = lgot_masks[r_symndx];
7799 }
7800
7801 /* Ensure reloc mapping code below stays sane. */
7802 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7803 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7804 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7805 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7806 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7807 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7808 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7809 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7810 abort ();
7811 switch (r_type)
7812 {
7813 default:
7814 break;
7815
7816 case R_PPC_GOT_TPREL16:
7817 case R_PPC_GOT_TPREL16_LO:
7818 if ((tls_mask & TLS_TLS) != 0
7819 && (tls_mask & TLS_TPREL) == 0)
7820 {
7821 bfd_vma insn;
7822
7823 insn = bfd_get_32 (input_bfd,
7824 contents + rel->r_offset - d_offset);
7825 insn &= 31 << 21;
7826 insn |= 0x3c020000; /* addis 0,2,0 */
7827 bfd_put_32 (input_bfd, insn,
7828 contents + rel->r_offset - d_offset);
7829 r_type = R_PPC_TPREL16_HA;
7830 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7831 }
7832 break;
7833
7834 case R_PPC_TLS:
7835 if ((tls_mask & TLS_TLS) != 0
7836 && (tls_mask & TLS_TPREL) == 0)
7837 {
7838 bfd_vma insn;
7839
7840 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7841 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7842 if (insn == 0)
7843 abort ();
7844 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7845 r_type = R_PPC_TPREL16_LO;
7846 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7847
7848 /* Was PPC_TLS which sits on insn boundary, now
7849 PPC_TPREL16_LO which is at low-order half-word. */
7850 rel->r_offset += d_offset;
7851 }
7852 break;
7853
7854 case R_PPC_GOT_TLSGD16_HI:
7855 case R_PPC_GOT_TLSGD16_HA:
7856 tls_gd = TLS_TPRELGD;
7857 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7858 goto tls_gdld_hi;
7859 break;
7860
7861 case R_PPC_GOT_TLSLD16_HI:
7862 case R_PPC_GOT_TLSLD16_HA:
7863 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7864 {
7865 tls_gdld_hi:
7866 if ((tls_mask & tls_gd) != 0)
7867 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7868 + R_PPC_GOT_TPREL16);
7869 else
7870 {
7871 rel->r_offset -= d_offset;
7872 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
7873 r_type = R_PPC_NONE;
7874 }
7875 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7876 }
7877 break;
7878
7879 case R_PPC_GOT_TLSGD16:
7880 case R_PPC_GOT_TLSGD16_LO:
7881 tls_gd = TLS_TPRELGD;
7882 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7883 goto tls_ldgd_opt;
7884 break;
7885
7886 case R_PPC_GOT_TLSLD16:
7887 case R_PPC_GOT_TLSLD16_LO:
7888 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7889 {
7890 unsigned int insn1, insn2;
7891 bfd_vma offset;
7892
7893 tls_ldgd_opt:
7894 offset = (bfd_vma) -1;
7895 /* If not using the newer R_PPC_TLSGD/LD to mark
7896 __tls_get_addr calls, we must trust that the call
7897 stays with its arg setup insns, ie. that the next
7898 reloc is the __tls_get_addr call associated with
7899 the current reloc. Edit both insns. */
7900 if (input_section->has_tls_get_addr_call
7901 && rel + 1 < relend
7902 && branch_reloc_hash_match (input_bfd, rel + 1,
7903 htab->tls_get_addr))
7904 offset = rel[1].r_offset;
7905 /* We read the low GOT_TLS insn because we need to keep
7906 the destination reg. It may be something other than
7907 the usual r3, and moved to r3 before the call by
7908 intervening code. */
7909 insn1 = bfd_get_32 (input_bfd,
7910 contents + rel->r_offset - d_offset);
7911 if ((tls_mask & tls_gd) != 0)
7912 {
7913 /* IE */
7914 insn1 &= (0x1f << 21) | (0x1f << 16);
7915 insn1 |= 32 << 26; /* lwz */
7916 if (offset != (bfd_vma) -1)
7917 {
7918 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7919 insn2 = 0x7c631214; /* add 3,3,2 */
7920 bfd_put_32 (input_bfd, insn2, contents + offset);
7921 }
7922 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7923 + R_PPC_GOT_TPREL16);
7924 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7925 }
7926 else
7927 {
7928 /* LE */
7929 insn1 &= 0x1f << 21;
7930 insn1 |= 0x3c020000; /* addis r,2,0 */
7931 if (tls_gd == 0)
7932 {
7933 /* Was an LD reloc. */
7934 for (r_symndx = 0;
7935 r_symndx < symtab_hdr->sh_info;
7936 r_symndx++)
7937 if (local_sections[r_symndx] == sec)
7938 break;
7939 if (r_symndx >= symtab_hdr->sh_info)
7940 r_symndx = STN_UNDEF;
7941 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7942 if (r_symndx != STN_UNDEF)
7943 rel->r_addend -= (local_syms[r_symndx].st_value
7944 + sec->output_offset
7945 + sec->output_section->vma);
7946 }
7947 r_type = R_PPC_TPREL16_HA;
7948 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7949 if (offset != (bfd_vma) -1)
7950 {
7951 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7952 rel[1].r_offset = offset + d_offset;
7953 rel[1].r_addend = rel->r_addend;
7954 insn2 = 0x38630000; /* addi 3,3,0 */
7955 bfd_put_32 (input_bfd, insn2, contents + offset);
7956 }
7957 }
7958 bfd_put_32 (input_bfd, insn1,
7959 contents + rel->r_offset - d_offset);
7960 if (tls_gd == 0)
7961 {
7962 /* We changed the symbol on an LD reloc. Start over
7963 in order to get h, sym, sec etc. right. */
7964 goto again;
7965 }
7966 }
7967 break;
7968
7969 case R_PPC_TLSGD:
7970 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7971 {
7972 unsigned int insn2;
7973 bfd_vma offset = rel->r_offset;
7974
7975 if ((tls_mask & TLS_TPRELGD) != 0)
7976 {
7977 /* IE */
7978 r_type = R_PPC_NONE;
7979 insn2 = 0x7c631214; /* add 3,3,2 */
7980 }
7981 else
7982 {
7983 /* LE */
7984 r_type = R_PPC_TPREL16_LO;
7985 rel->r_offset += d_offset;
7986 insn2 = 0x38630000; /* addi 3,3,0 */
7987 }
7988 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7989 bfd_put_32 (input_bfd, insn2, contents + offset);
7990 /* Zap the reloc on the _tls_get_addr call too. */
7991 BFD_ASSERT (offset == rel[1].r_offset);
7992 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7993 }
7994 break;
7995
7996 case R_PPC_TLSLD:
7997 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7998 {
7999 unsigned int insn2;
8000
8001 for (r_symndx = 0;
8002 r_symndx < symtab_hdr->sh_info;
8003 r_symndx++)
8004 if (local_sections[r_symndx] == sec)
8005 break;
8006 if (r_symndx >= symtab_hdr->sh_info)
8007 r_symndx = STN_UNDEF;
8008 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8009 if (r_symndx != STN_UNDEF)
8010 rel->r_addend -= (local_syms[r_symndx].st_value
8011 + sec->output_offset
8012 + sec->output_section->vma);
8013
8014 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8015 rel->r_offset += d_offset;
8016 insn2 = 0x38630000; /* addi 3,3,0 */
8017 bfd_put_32 (input_bfd, insn2,
8018 contents + rel->r_offset - d_offset);
8019 /* Zap the reloc on the _tls_get_addr call too. */
8020 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8021 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8022 goto again;
8023 }
8024 break;
8025 }
8026
8027 /* Handle other relocations that tweak non-addend part of insn. */
8028 branch_bit = 0;
8029 switch (r_type)
8030 {
8031 default:
8032 break;
8033
8034 /* Branch taken prediction relocations. */
8035 case R_PPC_ADDR14_BRTAKEN:
8036 case R_PPC_REL14_BRTAKEN:
8037 branch_bit = BRANCH_PREDICT_BIT;
8038 /* Fall through. */
8039
8040 /* Branch not taken prediction relocations. */
8041 case R_PPC_ADDR14_BRNTAKEN:
8042 case R_PPC_REL14_BRNTAKEN:
8043 {
8044 bfd_vma insn;
8045
8046 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8047 insn &= ~BRANCH_PREDICT_BIT;
8048 insn |= branch_bit;
8049
8050 from = (rel->r_offset
8051 + input_section->output_offset
8052 + input_section->output_section->vma);
8053
8054 /* Invert 'y' bit if not the default. */
8055 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8056 insn ^= BRANCH_PREDICT_BIT;
8057
8058 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8059 break;
8060 }
8061 }
8062
8063 if (ELIMINATE_COPY_RELOCS
8064 && h != NULL
8065 && !h->def_regular
8066 && h->protected_def
8067 && ppc_elf_hash_entry (h)->has_addr16_ha
8068 && ppc_elf_hash_entry (h)->has_addr16_lo
8069 && htab->params->pic_fixup > 0)
8070 {
8071 /* Convert lis;addi or lis;load/store accessing a protected
8072 variable defined in a shared library to PIC. */
8073 unsigned int insn;
8074
8075 if (r_type == R_PPC_ADDR16_HA)
8076 {
8077 insn = bfd_get_32 (input_bfd,
8078 contents + rel->r_offset - d_offset);
8079 if ((insn & (0x3f << 26)) == (15u << 26)
8080 && (insn & (0x1f << 16)) == 0 /* lis */)
8081 {
8082 bfd_byte *p;
8083 bfd_vma off;
8084 bfd_vma got_addr;
8085
8086 p = (contents + input_section->size
8087 - relax_info->workaround_size
8088 - relax_info->picfixup_size
8089 + picfixup_size);
8090 off = (p - contents) - (rel->r_offset - d_offset);
8091 if (off > 0x1fffffc || (off & 3) != 0)
8092 info->callbacks->einfo
8093 (_("%H: fixup branch overflow\n"),
8094 input_bfd, input_section, rel->r_offset);
8095
8096 bfd_put_32 (input_bfd, B | off,
8097 contents + rel->r_offset - d_offset);
8098 got_addr = (htab->elf.sgot->output_section->vma
8099 + htab->elf.sgot->output_offset
8100 + (h->got.offset & ~1));
8101 wrel->r_offset = (p - contents) + d_offset;
8102 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8103 wrel->r_addend = got_addr;
8104 insn &= ~0xffff;
8105 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8106 bfd_put_32 (input_bfd, insn, p);
8107
8108 /* Convert lis to lwz, loading address from GOT. */
8109 insn &= ~0xffff;
8110 insn ^= (32u ^ 15u) << 26;
8111 insn |= (insn & (0x1f << 21)) >> 5;
8112 insn |= got_addr & 0xffff;
8113 bfd_put_32 (input_bfd, insn, p + 4);
8114
8115 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8116 picfixup_size += 12;
8117
8118 /* Use one of the spare relocs, so --emit-relocs
8119 output is reasonable. */
8120 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8121 wrel++, rel++;
8122 rel->r_offset = wrel[-1].r_offset + 4;
8123 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8124 rel->r_addend = wrel[-1].r_addend;
8125
8126 /* Continue on as if we had a got reloc, to output
8127 dynamic reloc. */
8128 r_type = R_PPC_GOT16_LO;
8129 }
8130 else
8131 _bfd_error_handler
8132 /* xgettext:c-format */
8133 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8134 input_bfd, input_section, rel->r_offset,
8135 "R_PPC_ADDR16_HA", insn);
8136 }
8137 else if (r_type == R_PPC_ADDR16_LO)
8138 {
8139 insn = bfd_get_32 (input_bfd,
8140 contents + rel->r_offset - d_offset);
8141 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8142 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8143 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8144 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8145 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8146 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8147 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8148 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8149 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8150 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8151 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8152 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8153 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8154 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8155 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8156 && (insn & 3) != 1)
8157 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8158 && ((insn & 3) == 0 || (insn & 3) == 3)))
8159 {
8160 /* Arrange to apply the reloc addend, if any. */
8161 relocation = 0;
8162 unresolved_reloc = FALSE;
8163 rel->r_info = ELF32_R_INFO (0, r_type);
8164 }
8165 else
8166 _bfd_error_handler
8167 /* xgettext:c-format */
8168 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8169 input_bfd, input_section, rel->r_offset,
8170 "R_PPC_ADDR16_LO", insn);
8171 }
8172 }
8173
8174 ifunc = NULL;
8175 if (!htab->is_vxworks)
8176 {
8177 struct plt_entry *ent;
8178
8179 if (h != NULL)
8180 {
8181 if (h->type == STT_GNU_IFUNC)
8182 ifunc = &h->plt.plist;
8183 }
8184 else if (local_got_offsets != NULL
8185 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8186 {
8187 struct plt_entry **local_plt;
8188
8189 local_plt = (struct plt_entry **) (local_got_offsets
8190 + symtab_hdr->sh_info);
8191 ifunc = local_plt + r_symndx;
8192 }
8193
8194 ent = NULL;
8195 if (ifunc != NULL
8196 && (!bfd_link_pic (info)
8197 || is_branch_reloc (r_type)))
8198 {
8199 addend = 0;
8200 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8201 addend = rel->r_addend;
8202 ent = find_plt_ent (ifunc, got2, addend);
8203 }
8204 if (ent != NULL)
8205 {
8206 if (bfd_link_pic (info)
8207 && ent->sec != got2
8208 && htab->plt_type != PLT_NEW
8209 && (!htab->elf.dynamic_sections_created
8210 || h == NULL
8211 || h->dynindx == -1))
8212 {
8213 /* Uh oh, we are going to create a pic glink stub
8214 for an ifunc (here for h == NULL and later in
8215 finish_dynamic_symbol for h != NULL), and
8216 apparently are using code compiled with
8217 -mbss-plt. The difficulty is that -mbss-plt code
8218 gives no indication via a magic PLTREL24 addend
8219 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8220 is pointing into a .got2 section (and how far
8221 into .got2). */
8222 info->callbacks->einfo
8223 /* xgettext:c-format */
8224 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8225 input_bfd, input_section, rel->r_offset, sym_name);
8226 }
8227 if (h == NULL && (ent->plt.offset & 1) == 0)
8228 {
8229 Elf_Internal_Rela rela;
8230 bfd_byte *loc;
8231
8232 rela.r_offset = (htab->elf.iplt->output_section->vma
8233 + htab->elf.iplt->output_offset
8234 + ent->plt.offset);
8235 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8236 rela.r_addend = relocation;
8237 loc = htab->elf.irelplt->contents;
8238 loc += (htab->elf.irelplt->reloc_count++
8239 * sizeof (Elf32_External_Rela));
8240 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8241 htab->local_ifunc_resolver = 1;
8242
8243 ent->plt.offset |= 1;
8244 }
8245 if (h == NULL && (ent->glink_offset & 1) == 0)
8246 {
8247 unsigned char *p = ((unsigned char *) htab->glink->contents
8248 + ent->glink_offset);
8249 write_glink_stub (ent, htab->elf.iplt, p, info);
8250 ent->glink_offset |= 1;
8251 }
8252
8253 unresolved_reloc = FALSE;
8254 if (htab->plt_type == PLT_NEW
8255 || !htab->elf.dynamic_sections_created
8256 || h == NULL
8257 || h->dynindx == -1)
8258 relocation = (htab->glink->output_section->vma
8259 + htab->glink->output_offset
8260 + (ent->glink_offset & ~1));
8261 else
8262 relocation = (htab->elf.splt->output_section->vma
8263 + htab->elf.splt->output_offset
8264 + ent->plt.offset);
8265 }
8266 }
8267
8268 addend = rel->r_addend;
8269 howto = NULL;
8270 if (r_type < R_PPC_max)
8271 howto = ppc_elf_howto_table[r_type];
8272
8273 switch (r_type)
8274 {
8275 default:
8276 break;
8277
8278 case R_PPC_TPREL16_HA:
8279 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8280 {
8281 bfd_byte *p = contents + (rel->r_offset & ~3);
8282 unsigned int insn = bfd_get_32 (input_bfd, p);
8283 if ((insn & ((0x3f << 26) | 0x1f << 16))
8284 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8285 /* xgettext:c-format */
8286 info->callbacks->minfo
8287 (_("%H: warning: %s unexpected insn %#x.\n"),
8288 input_bfd, input_section, rel->r_offset, howto->name, insn);
8289 else
8290 bfd_put_32 (input_bfd, NOP, p);
8291 }
8292 break;
8293
8294 case R_PPC_TPREL16_LO:
8295 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8296 {
8297 bfd_byte *p = contents + (rel->r_offset & ~3);
8298 unsigned int insn = bfd_get_32 (input_bfd, p);
8299 insn &= ~(0x1f << 16);
8300 insn |= 2 << 16;
8301 bfd_put_32 (input_bfd, insn, p);
8302 }
8303 break;
8304 }
8305
8306 tls_type = 0;
8307 switch (r_type)
8308 {
8309 default:
8310 info->callbacks->einfo
8311 /* xgettext:c-format */
8312 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8313 input_bfd, (int) r_type, sym_name);
8314
8315 bfd_set_error (bfd_error_bad_value);
8316 ret = FALSE;
8317 goto copy_reloc;
8318
8319 case R_PPC_NONE:
8320 case R_PPC_TLS:
8321 case R_PPC_TLSGD:
8322 case R_PPC_TLSLD:
8323 case R_PPC_EMB_MRKREF:
8324 case R_PPC_GNU_VTINHERIT:
8325 case R_PPC_GNU_VTENTRY:
8326 goto copy_reloc;
8327
8328 /* GOT16 relocations. Like an ADDR16 using the symbol's
8329 address in the GOT as relocation value instead of the
8330 symbol's value itself. Also, create a GOT entry for the
8331 symbol and put the symbol value there. */
8332 case R_PPC_GOT_TLSGD16:
8333 case R_PPC_GOT_TLSGD16_LO:
8334 case R_PPC_GOT_TLSGD16_HI:
8335 case R_PPC_GOT_TLSGD16_HA:
8336 tls_type = TLS_TLS | TLS_GD;
8337 goto dogot;
8338
8339 case R_PPC_GOT_TLSLD16:
8340 case R_PPC_GOT_TLSLD16_LO:
8341 case R_PPC_GOT_TLSLD16_HI:
8342 case R_PPC_GOT_TLSLD16_HA:
8343 tls_type = TLS_TLS | TLS_LD;
8344 goto dogot;
8345
8346 case R_PPC_GOT_TPREL16:
8347 case R_PPC_GOT_TPREL16_LO:
8348 case R_PPC_GOT_TPREL16_HI:
8349 case R_PPC_GOT_TPREL16_HA:
8350 tls_type = TLS_TLS | TLS_TPREL;
8351 goto dogot;
8352
8353 case R_PPC_GOT_DTPREL16:
8354 case R_PPC_GOT_DTPREL16_LO:
8355 case R_PPC_GOT_DTPREL16_HI:
8356 case R_PPC_GOT_DTPREL16_HA:
8357 tls_type = TLS_TLS | TLS_DTPREL;
8358 goto dogot;
8359
8360 case R_PPC_GOT16:
8361 case R_PPC_GOT16_LO:
8362 case R_PPC_GOT16_HI:
8363 case R_PPC_GOT16_HA:
8364 tls_mask = 0;
8365 dogot:
8366 {
8367 /* Relocation is to the entry for this symbol in the global
8368 offset table. */
8369 bfd_vma off;
8370 bfd_vma *offp;
8371 unsigned long indx;
8372
8373 if (htab->elf.sgot == NULL)
8374 abort ();
8375
8376 indx = 0;
8377 if (tls_type == (TLS_TLS | TLS_LD)
8378 && (h == NULL
8379 || !h->def_dynamic))
8380 offp = &htab->tlsld_got.offset;
8381 else if (h != NULL)
8382 {
8383 if (!htab->elf.dynamic_sections_created
8384 || h->dynindx == -1
8385 || SYMBOL_REFERENCES_LOCAL (info, h)
8386 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8387 /* This is actually a static link, or it is a
8388 -Bsymbolic link and the symbol is defined
8389 locally, or the symbol was forced to be local
8390 because of a version file. */
8391 ;
8392 else
8393 {
8394 indx = h->dynindx;
8395 unresolved_reloc = FALSE;
8396 }
8397 offp = &h->got.offset;
8398 }
8399 else
8400 {
8401 if (local_got_offsets == NULL)
8402 abort ();
8403 offp = &local_got_offsets[r_symndx];
8404 }
8405
8406 /* The offset must always be a multiple of 4. We use the
8407 least significant bit to record whether we have already
8408 processed this entry. */
8409 off = *offp;
8410 if ((off & 1) != 0)
8411 off &= ~1;
8412 else
8413 {
8414 unsigned int tls_m = (tls_mask
8415 & (TLS_LD | TLS_GD | TLS_DTPREL
8416 | TLS_TPREL | TLS_TPRELGD));
8417
8418 if (offp == &htab->tlsld_got.offset)
8419 tls_m = TLS_LD;
8420 else if (h == NULL
8421 || !h->def_dynamic)
8422 tls_m &= ~TLS_LD;
8423
8424 /* We might have multiple got entries for this sym.
8425 Initialize them all. */
8426 do
8427 {
8428 int tls_ty = 0;
8429
8430 if ((tls_m & TLS_LD) != 0)
8431 {
8432 tls_ty = TLS_TLS | TLS_LD;
8433 tls_m &= ~TLS_LD;
8434 }
8435 else if ((tls_m & TLS_GD) != 0)
8436 {
8437 tls_ty = TLS_TLS | TLS_GD;
8438 tls_m &= ~TLS_GD;
8439 }
8440 else if ((tls_m & TLS_DTPREL) != 0)
8441 {
8442 tls_ty = TLS_TLS | TLS_DTPREL;
8443 tls_m &= ~TLS_DTPREL;
8444 }
8445 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8446 {
8447 tls_ty = TLS_TLS | TLS_TPREL;
8448 tls_m = 0;
8449 }
8450
8451 /* Generate relocs for the dynamic linker. */
8452 if (indx != 0
8453 || (bfd_link_pic (info)
8454 && (h == NULL
8455 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8456 || offp == &htab->tlsld_got.offset)
8457 && !(tls_ty == (TLS_TLS | TLS_TPREL)
8458 && bfd_link_executable (info)
8459 && SYMBOL_REFERENCES_LOCAL (info, h))))
8460 {
8461 asection *rsec = htab->elf.srelgot;
8462 bfd_byte * loc;
8463
8464 if (ifunc != NULL)
8465 {
8466 rsec = htab->elf.irelplt;
8467 if (indx == 0)
8468 htab->local_ifunc_resolver = 1;
8469 else if (is_static_defined (h))
8470 htab->maybe_local_ifunc_resolver = 1;
8471 }
8472 outrel.r_offset = (htab->elf.sgot->output_section->vma
8473 + htab->elf.sgot->output_offset
8474 + off);
8475 outrel.r_addend = 0;
8476 if (tls_ty & (TLS_LD | TLS_GD))
8477 {
8478 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8479 if (tls_ty == (TLS_TLS | TLS_GD))
8480 {
8481 loc = rsec->contents;
8482 loc += (rsec->reloc_count++
8483 * sizeof (Elf32_External_Rela));
8484 bfd_elf32_swap_reloca_out (output_bfd,
8485 &outrel, loc);
8486 outrel.r_offset += 4;
8487 outrel.r_info
8488 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8489 }
8490 }
8491 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8492 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8493 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8494 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8495 else if (indx != 0)
8496 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8497 else if (ifunc != NULL)
8498 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8499 else
8500 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8501 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8502 {
8503 outrel.r_addend += relocation;
8504 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8505 {
8506 if (htab->elf.tls_sec == NULL)
8507 outrel.r_addend = 0;
8508 else
8509 outrel.r_addend -= htab->elf.tls_sec->vma;
8510 }
8511 }
8512 loc = rsec->contents;
8513 loc += (rsec->reloc_count++
8514 * sizeof (Elf32_External_Rela));
8515 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8516 }
8517
8518 /* Init the .got section contents if we're not
8519 emitting a reloc. */
8520 else
8521 {
8522 bfd_vma value = relocation;
8523
8524 if (tls_ty != 0)
8525 {
8526 if (htab->elf.tls_sec == NULL)
8527 value = 0;
8528 else
8529 {
8530 if (tls_ty & TLS_LD)
8531 value = 0;
8532 else
8533 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8534 if (tls_ty & TLS_TPREL)
8535 value += DTP_OFFSET - TP_OFFSET;
8536 }
8537
8538 if (tls_ty & (TLS_LD | TLS_GD))
8539 {
8540 bfd_put_32 (input_bfd, value,
8541 htab->elf.sgot->contents + off + 4);
8542 value = 1;
8543 }
8544 }
8545 bfd_put_32 (input_bfd, value,
8546 htab->elf.sgot->contents + off);
8547 }
8548
8549 off += 4;
8550 if (tls_ty & (TLS_LD | TLS_GD))
8551 off += 4;
8552 }
8553 while (tls_m != 0);
8554
8555 off = *offp;
8556 *offp = off | 1;
8557 }
8558
8559 if (off >= (bfd_vma) -2)
8560 abort ();
8561
8562 if ((tls_type & TLS_TLS) != 0)
8563 {
8564 if (tls_type != (TLS_TLS | TLS_LD))
8565 {
8566 if ((tls_mask & TLS_LD) != 0
8567 && !(h == NULL
8568 || !h->def_dynamic))
8569 off += 8;
8570 if (tls_type != (TLS_TLS | TLS_GD))
8571 {
8572 if ((tls_mask & TLS_GD) != 0)
8573 off += 8;
8574 if (tls_type != (TLS_TLS | TLS_DTPREL))
8575 {
8576 if ((tls_mask & TLS_DTPREL) != 0)
8577 off += 4;
8578 }
8579 }
8580 }
8581 }
8582
8583 /* If here for a picfixup, we're done. */
8584 if (r_type != ELF32_R_TYPE (rel->r_info))
8585 goto copy_reloc;
8586
8587 relocation = (htab->elf.sgot->output_section->vma
8588 + htab->elf.sgot->output_offset
8589 + off
8590 - SYM_VAL (htab->elf.hgot));
8591
8592 /* Addends on got relocations don't make much sense.
8593 x+off@got is actually x@got+off, and since the got is
8594 generated by a hash table traversal, the value in the
8595 got at entry m+n bears little relation to the entry m. */
8596 if (addend != 0)
8597 info->callbacks->einfo
8598 /* xgettext:c-format */
8599 (_("%H: non-zero addend on %s reloc against `%s'\n"),
8600 input_bfd, input_section, rel->r_offset,
8601 howto->name,
8602 sym_name);
8603 }
8604 break;
8605
8606 /* Relocations that need no special processing. */
8607 case R_PPC_LOCAL24PC:
8608 /* It makes no sense to point a local relocation
8609 at a symbol not in this object. */
8610 if (unresolved_reloc)
8611 {
8612 (*info->callbacks->undefined_symbol) (info,
8613 h->root.root.string,
8614 input_bfd,
8615 input_section,
8616 rel->r_offset,
8617 TRUE);
8618 goto copy_reloc;
8619 }
8620 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8621 {
8622 /* @local on an ifunc does not really make sense since
8623 the ifunc resolver can take you anywhere. More
8624 seriously, calls to ifuncs must go through a plt call
8625 stub, and for pic the plt call stubs uses r30 to
8626 access the PLT. The problem is that a call that is
8627 local won't have the +32k reloc addend trick marking
8628 -fPIC code, so the linker won't know whether r30 is
8629 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8630 /* xgettext:c-format */
8631 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8632 input_bfd, input_section, rel->r_offset,
8633 h->root.root.string);
8634 }
8635 break;
8636
8637 case R_PPC_DTPREL16:
8638 case R_PPC_DTPREL16_LO:
8639 case R_PPC_DTPREL16_HI:
8640 case R_PPC_DTPREL16_HA:
8641 if (htab->elf.tls_sec != NULL)
8642 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8643 break;
8644
8645 /* Relocations that may need to be propagated if this is a shared
8646 object. */
8647 case R_PPC_TPREL16:
8648 case R_PPC_TPREL16_LO:
8649 case R_PPC_TPREL16_HI:
8650 case R_PPC_TPREL16_HA:
8651 if (h != NULL
8652 && h->root.type == bfd_link_hash_undefweak
8653 && h->dynindx == -1)
8654 {
8655 /* Make this relocation against an undefined weak symbol
8656 resolve to zero. This is really just a tweak, since
8657 code using weak externs ought to check that they are
8658 defined before using them. */
8659 bfd_byte *p = contents + rel->r_offset - d_offset;
8660 unsigned int insn = bfd_get_32 (input_bfd, p);
8661 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8662 if (insn != 0)
8663 bfd_put_32 (input_bfd, insn, p);
8664 break;
8665 }
8666 if (htab->elf.tls_sec != NULL)
8667 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8668 /* The TPREL16 relocs shouldn't really be used in shared
8669 libs or with non-local symbols as that will result in
8670 DT_TEXTREL being set, but support them anyway. */
8671 goto dodyn;
8672
8673 case R_PPC_TPREL32:
8674 if (htab->elf.tls_sec != NULL)
8675 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8676 goto dodyn;
8677
8678 case R_PPC_DTPREL32:
8679 if (htab->elf.tls_sec != NULL)
8680 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8681 goto dodyn;
8682
8683 case R_PPC_DTPMOD32:
8684 relocation = 1;
8685 addend = 0;
8686 goto dodyn;
8687
8688 case R_PPC_REL16:
8689 case R_PPC_REL16_LO:
8690 case R_PPC_REL16_HI:
8691 case R_PPC_REL16_HA:
8692 case R_PPC_REL16DX_HA:
8693 break;
8694
8695 case R_PPC_REL32:
8696 if (h == NULL || h == htab->elf.hgot)
8697 break;
8698 /* fall through */
8699
8700 case R_PPC_ADDR32:
8701 case R_PPC_ADDR16:
8702 case R_PPC_ADDR16_LO:
8703 case R_PPC_ADDR16_HI:
8704 case R_PPC_ADDR16_HA:
8705 case R_PPC_UADDR32:
8706 case R_PPC_UADDR16:
8707 goto dodyn;
8708
8709 case R_PPC_VLE_REL8:
8710 case R_PPC_VLE_REL15:
8711 case R_PPC_VLE_REL24:
8712 case R_PPC_REL24:
8713 case R_PPC_REL14:
8714 case R_PPC_REL14_BRTAKEN:
8715 case R_PPC_REL14_BRNTAKEN:
8716 /* If these relocations are not to a named symbol, they can be
8717 handled right here, no need to bother the dynamic linker. */
8718 if (SYMBOL_CALLS_LOCAL (info, h)
8719 || h == htab->elf.hgot)
8720 break;
8721 /* fall through */
8722
8723 case R_PPC_ADDR24:
8724 case R_PPC_ADDR14:
8725 case R_PPC_ADDR14_BRTAKEN:
8726 case R_PPC_ADDR14_BRNTAKEN:
8727 if (h != NULL && !bfd_link_pic (info))
8728 break;
8729 /* fall through */
8730
8731 dodyn:
8732 if ((input_section->flags & SEC_ALLOC) == 0
8733 || is_vxworks_tls)
8734 break;
8735
8736 if ((bfd_link_pic (info)
8737 && !(h != NULL
8738 && ((h->root.type == bfd_link_hash_undefined
8739 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8740 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
8741 && (must_be_dyn_reloc (info, r_type)
8742 || !SYMBOL_CALLS_LOCAL (info, h)))
8743 || (ELIMINATE_COPY_RELOCS
8744 && !bfd_link_pic (info)
8745 && h != NULL
8746 && h->dynindx != -1
8747 && !h->non_got_ref
8748 && !h->def_regular
8749 && !(h->protected_def
8750 && ppc_elf_hash_entry (h)->has_addr16_ha
8751 && ppc_elf_hash_entry (h)->has_addr16_lo
8752 && htab->params->pic_fixup > 0)))
8753 {
8754 int skip;
8755 bfd_byte *loc;
8756 asection *sreloc;
8757 long indx = 0;
8758
8759 #ifdef DEBUG
8760 fprintf (stderr, "ppc_elf_relocate_section needs to "
8761 "create relocation for %s\n",
8762 (h && h->root.root.string
8763 ? h->root.root.string : "<unknown>"));
8764 #endif
8765
8766 /* When generating a shared object, these relocations
8767 are copied into the output file to be resolved at run
8768 time. */
8769 skip = 0;
8770 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8771 input_section,
8772 rel->r_offset);
8773 if (outrel.r_offset == (bfd_vma) -1
8774 || outrel.r_offset == (bfd_vma) -2)
8775 skip = (int) outrel.r_offset;
8776 outrel.r_offset += (input_section->output_section->vma
8777 + input_section->output_offset);
8778
8779 if (skip)
8780 memset (&outrel, 0, sizeof outrel);
8781 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
8782 {
8783 indx = h->dynindx;
8784 BFD_ASSERT (indx != -1);
8785 unresolved_reloc = FALSE;
8786 outrel.r_info = ELF32_R_INFO (indx, r_type);
8787 outrel.r_addend = rel->r_addend;
8788 }
8789 else
8790 {
8791 outrel.r_addend = relocation + rel->r_addend;
8792
8793 if (r_type != R_PPC_ADDR32)
8794 {
8795 if (ifunc != NULL)
8796 {
8797 /* If we get here when building a static
8798 executable, then the libc startup function
8799 responsible for applying indirect function
8800 relocations is going to complain about
8801 the reloc type.
8802 If we get here when building a dynamic
8803 executable, it will be because we have
8804 a text relocation. The dynamic loader
8805 will set the text segment writable and
8806 non-executable to apply text relocations.
8807 So we'll segfault when trying to run the
8808 indirection function to resolve the reloc. */
8809 info->callbacks->einfo
8810 /* xgettext:c-format */
8811 (_("%H: relocation %s for indirect "
8812 "function %s unsupported\n"),
8813 input_bfd, input_section, rel->r_offset,
8814 howto->name,
8815 sym_name);
8816 ret = FALSE;
8817 }
8818 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8819 ;
8820 else if (sec == NULL || sec->owner == NULL)
8821 {
8822 bfd_set_error (bfd_error_bad_value);
8823 ret = FALSE;
8824 }
8825 else
8826 {
8827 asection *osec;
8828
8829 /* We are turning this relocation into one
8830 against a section symbol. It would be
8831 proper to subtract the symbol's value,
8832 osec->vma, from the emitted reloc addend,
8833 but ld.so expects buggy relocs.
8834 FIXME: Why not always use a zero index? */
8835 osec = sec->output_section;
8836 indx = elf_section_data (osec)->dynindx;
8837 if (indx == 0)
8838 {
8839 osec = htab->elf.text_index_section;
8840 indx = elf_section_data (osec)->dynindx;
8841 }
8842 BFD_ASSERT (indx != 0);
8843 #ifdef DEBUG
8844 if (indx == 0)
8845 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8846 indx, osec->name, osec->flags,
8847 h->root.root.string);
8848 #endif
8849 }
8850
8851 outrel.r_info = ELF32_R_INFO (indx, r_type);
8852 }
8853 else if (ifunc != NULL)
8854 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8855 else
8856 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8857 }
8858
8859 sreloc = elf_section_data (input_section)->sreloc;
8860 if (ifunc)
8861 {
8862 sreloc = htab->elf.irelplt;
8863 if (indx == 0)
8864 htab->local_ifunc_resolver = 1;
8865 else if (is_static_defined (h))
8866 htab->maybe_local_ifunc_resolver = 1;
8867 }
8868 if (sreloc == NULL)
8869 return FALSE;
8870
8871 loc = sreloc->contents;
8872 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8873 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8874
8875 if (skip == -1)
8876 goto copy_reloc;
8877
8878 /* This reloc will be computed at runtime. Clear the memory
8879 so that it contains a predictable value for prelink. */
8880 if (!skip)
8881 {
8882 relocation = howto->pc_relative ? outrel.r_offset : 0;
8883 addend = 0;
8884 break;
8885 }
8886 }
8887 break;
8888
8889 case R_PPC_RELAX_PLT:
8890 case R_PPC_RELAX_PLTREL24:
8891 if (h != NULL)
8892 {
8893 struct plt_entry *ent;
8894 bfd_vma got2_addend = 0;
8895
8896 if (r_type == R_PPC_RELAX_PLTREL24)
8897 {
8898 if (bfd_link_pic (info))
8899 got2_addend = addend;
8900 addend = 0;
8901 }
8902 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8903 if (htab->plt_type == PLT_NEW)
8904 relocation = (htab->glink->output_section->vma
8905 + htab->glink->output_offset
8906 + ent->glink_offset);
8907 else
8908 relocation = (htab->elf.splt->output_section->vma
8909 + htab->elf.splt->output_offset
8910 + ent->plt.offset);
8911 }
8912 /* Fall through. */
8913
8914 case R_PPC_RELAX:
8915 {
8916 const int *stub;
8917 size_t size;
8918 size_t insn_offset = rel->r_offset;
8919 unsigned int insn;
8920
8921 if (bfd_link_pic (info))
8922 {
8923 relocation -= (input_section->output_section->vma
8924 + input_section->output_offset
8925 + rel->r_offset - 4);
8926 stub = shared_stub_entry;
8927 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
8928 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
8929 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
8930 stub += 3;
8931 size = ARRAY_SIZE (shared_stub_entry) - 3;
8932 }
8933 else
8934 {
8935 stub = stub_entry;
8936 size = ARRAY_SIZE (stub_entry);
8937 }
8938
8939 relocation += addend;
8940 if (bfd_link_relocatable (info))
8941 relocation = 0;
8942
8943 /* First insn is HA, second is LO. */
8944 insn = *stub++;
8945 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8946 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8947 insn_offset += 4;
8948
8949 insn = *stub++;
8950 insn |= relocation & 0xffff;
8951 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8952 insn_offset += 4;
8953 size -= 2;
8954
8955 while (size != 0)
8956 {
8957 insn = *stub++;
8958 --size;
8959 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8960 insn_offset += 4;
8961 }
8962
8963 /* Rewrite the reloc and convert one of the trailing nop
8964 relocs to describe this relocation. */
8965 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8966 /* The relocs are at the bottom 2 bytes */
8967 wrel->r_offset = rel->r_offset + d_offset;
8968 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8969 wrel->r_addend = rel->r_addend;
8970 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
8971 wrel++, rel++;
8972 wrel->r_offset += 4;
8973 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8974 }
8975 continue;
8976
8977 /* Indirect .sdata relocation. */
8978 case R_PPC_EMB_SDAI16:
8979 BFD_ASSERT (htab->sdata[0].section != NULL);
8980 if (!is_static_defined (htab->sdata[0].sym))
8981 {
8982 unresolved_reloc = TRUE;
8983 break;
8984 }
8985 relocation
8986 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8987 h, relocation, rel);
8988 addend = 0;
8989 break;
8990
8991 /* Indirect .sdata2 relocation. */
8992 case R_PPC_EMB_SDA2I16:
8993 BFD_ASSERT (htab->sdata[1].section != NULL);
8994 if (!is_static_defined (htab->sdata[1].sym))
8995 {
8996 unresolved_reloc = TRUE;
8997 break;
8998 }
8999 relocation
9000 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9001 h, relocation, rel);
9002 addend = 0;
9003 break;
9004
9005 /* Handle the TOC16 reloc. We want to use the offset within the .got
9006 section, not the actual VMA. This is appropriate when generating
9007 an embedded ELF object, for which the .got section acts like the
9008 AIX .toc section. */
9009 case R_PPC_TOC16: /* phony GOT16 relocations */
9010 if (sec == NULL || sec->output_section == NULL)
9011 {
9012 unresolved_reloc = TRUE;
9013 break;
9014 }
9015 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9016 ".got") == 0
9017 || strcmp (bfd_get_section_name (sec->owner, sec),
9018 ".cgot") == 0);
9019
9020 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9021 break;
9022
9023 case R_PPC_PLTREL24:
9024 if (h != NULL && ifunc == NULL)
9025 {
9026 struct plt_entry *ent;
9027
9028 ent = find_plt_ent (&h->plt.plist, got2,
9029 bfd_link_pic (info) ? addend : 0);
9030 if (ent == NULL
9031 || htab->elf.splt == NULL)
9032 {
9033 /* We didn't make a PLT entry for this symbol. This
9034 happens when statically linking PIC code, or when
9035 using -Bsymbolic. */
9036 }
9037 else
9038 {
9039 /* Relocation is to the entry for this symbol in the
9040 procedure linkage table. */
9041 unresolved_reloc = FALSE;
9042 if (htab->plt_type == PLT_NEW)
9043 relocation = (htab->glink->output_section->vma
9044 + htab->glink->output_offset
9045 + ent->glink_offset);
9046 else
9047 relocation = (htab->elf.splt->output_section->vma
9048 + htab->elf.splt->output_offset
9049 + ent->plt.offset);
9050 }
9051 }
9052
9053 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9054 addend specifies the GOT pointer offset within .got2.
9055 Don't apply it to the relocation field. */
9056 addend = 0;
9057 break;
9058
9059 /* Relocate against _SDA_BASE_. */
9060 case R_PPC_SDAREL16:
9061 {
9062 const char *name;
9063 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9064
9065 if (sec == NULL
9066 || sec->output_section == NULL
9067 || !is_static_defined (sda))
9068 {
9069 unresolved_reloc = TRUE;
9070 break;
9071 }
9072 addend -= SYM_VAL (sda);
9073
9074 name = bfd_get_section_name (output_bfd, sec->output_section);
9075 if (!(strcmp (name, ".sdata") == 0
9076 || strcmp (name, ".sbss") == 0))
9077 {
9078 info->callbacks->einfo
9079 /* xgettext:c-format */
9080 (_("%P: %B: the target (%s) of a %s relocation is "
9081 "in the wrong output section (%s)\n"),
9082 input_bfd,
9083 sym_name,
9084 howto->name,
9085 name);
9086 }
9087 }
9088 break;
9089
9090 /* Relocate against _SDA2_BASE_. */
9091 case R_PPC_EMB_SDA2REL:
9092 {
9093 const char *name;
9094 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9095
9096 if (sec == NULL
9097 || sec->output_section == NULL
9098 || !is_static_defined (sda))
9099 {
9100 unresolved_reloc = TRUE;
9101 break;
9102 }
9103 addend -= SYM_VAL (sda);
9104
9105 name = bfd_get_section_name (output_bfd, sec->output_section);
9106 if (!(strcmp (name, ".sdata2") == 0
9107 || strcmp (name, ".sbss2") == 0))
9108 {
9109 info->callbacks->einfo
9110 /* xgettext:c-format */
9111 (_("%P: %B: the target (%s) of a %s relocation is "
9112 "in the wrong output section (%s)\n"),
9113 input_bfd,
9114 sym_name,
9115 howto->name,
9116 name);
9117 }
9118 }
9119 break;
9120
9121 case R_PPC_VLE_LO16A:
9122 relocation = relocation + addend;
9123 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9124 contents + rel->r_offset, relocation,
9125 split16a_type, htab->params->vle_reloc_fixup);
9126 goto copy_reloc;
9127
9128 case R_PPC_VLE_LO16D:
9129 relocation = relocation + addend;
9130 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9131 contents + rel->r_offset, relocation,
9132 split16d_type, htab->params->vle_reloc_fixup);
9133 goto copy_reloc;
9134
9135 case R_PPC_VLE_HI16A:
9136 relocation = (relocation + addend) >> 16;
9137 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9138 contents + rel->r_offset, relocation,
9139 split16a_type, htab->params->vle_reloc_fixup);
9140 goto copy_reloc;
9141
9142 case R_PPC_VLE_HI16D:
9143 relocation = (relocation + addend) >> 16;
9144 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9145 contents + rel->r_offset, relocation,
9146 split16d_type, htab->params->vle_reloc_fixup);
9147 goto copy_reloc;
9148
9149 case R_PPC_VLE_HA16A:
9150 relocation = (relocation + addend + 0x8000) >> 16;
9151 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9152 contents + rel->r_offset, relocation,
9153 split16a_type, htab->params->vle_reloc_fixup);
9154 goto copy_reloc;
9155
9156 case R_PPC_VLE_HA16D:
9157 relocation = (relocation + addend + 0x8000) >> 16;
9158 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9159 contents + rel->r_offset, relocation,
9160 split16d_type, htab->params->vle_reloc_fixup);
9161 goto copy_reloc;
9162
9163 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9164 case R_PPC_EMB_SDA21:
9165 case R_PPC_VLE_SDA21:
9166 case R_PPC_EMB_RELSDA:
9167 case R_PPC_VLE_SDA21_LO:
9168 {
9169 const char *name;
9170 int reg;
9171 unsigned int insn;
9172 struct elf_link_hash_entry *sda = NULL;
9173
9174 if (sec == NULL || sec->output_section == NULL)
9175 {
9176 unresolved_reloc = TRUE;
9177 break;
9178 }
9179
9180 name = bfd_get_section_name (output_bfd, sec->output_section);
9181 if (strcmp (name, ".sdata") == 0
9182 || strcmp (name, ".sbss") == 0)
9183 {
9184 reg = 13;
9185 sda = htab->sdata[0].sym;
9186 }
9187 else if (strcmp (name, ".sdata2") == 0
9188 || strcmp (name, ".sbss2") == 0)
9189 {
9190 reg = 2;
9191 sda = htab->sdata[1].sym;
9192 }
9193 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9194 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9195 {
9196 reg = 0;
9197 }
9198 else
9199 {
9200 info->callbacks->einfo
9201 /* xgettext:c-format */
9202 (_("%P: %B: the target (%s) of a %s relocation is "
9203 "in the wrong output section (%s)\n"),
9204 input_bfd,
9205 sym_name,
9206 howto->name,
9207 name);
9208
9209 bfd_set_error (bfd_error_bad_value);
9210 ret = FALSE;
9211 goto copy_reloc;
9212 }
9213
9214 if (sda != NULL)
9215 {
9216 if (!is_static_defined (sda))
9217 {
9218 unresolved_reloc = TRUE;
9219 break;
9220 }
9221 addend -= SYM_VAL (sda);
9222 }
9223
9224 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9225 if (reg == 0
9226 && (r_type == R_PPC_VLE_SDA21
9227 || r_type == R_PPC_VLE_SDA21_LO))
9228 {
9229 relocation = relocation + addend;
9230 addend = 0;
9231
9232 /* Force e_li insn, keeping RT from original insn. */
9233 insn &= 0x1f << 21;
9234 insn |= 28u << 26;
9235
9236 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9237 /* Top 4 bits of value to 17..20. */
9238 insn |= (relocation & 0xf0000) >> 5;
9239 /* Next 5 bits of the value to 11..15. */
9240 insn |= (relocation & 0xf800) << 5;
9241 /* And the final 11 bits of the value to bits 21 to 31. */
9242 insn |= relocation & 0x7ff;
9243
9244 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9245
9246 if (r_type == R_PPC_VLE_SDA21
9247 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9248 goto overflow;
9249 goto copy_reloc;
9250 }
9251 else if (r_type == R_PPC_EMB_SDA21
9252 || r_type == R_PPC_VLE_SDA21
9253 || r_type == R_PPC_VLE_SDA21_LO)
9254 {
9255 /* Fill in register field. */
9256 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9257 }
9258 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9259 }
9260 break;
9261
9262 case R_PPC_VLE_SDAREL_LO16A:
9263 case R_PPC_VLE_SDAREL_LO16D:
9264 case R_PPC_VLE_SDAREL_HI16A:
9265 case R_PPC_VLE_SDAREL_HI16D:
9266 case R_PPC_VLE_SDAREL_HA16A:
9267 case R_PPC_VLE_SDAREL_HA16D:
9268 {
9269 bfd_vma value;
9270 const char *name;
9271 struct elf_link_hash_entry *sda = NULL;
9272
9273 if (sec == NULL || sec->output_section == NULL)
9274 {
9275 unresolved_reloc = TRUE;
9276 break;
9277 }
9278
9279 name = bfd_get_section_name (output_bfd, sec->output_section);
9280 if (strcmp (name, ".sdata") == 0
9281 || strcmp (name, ".sbss") == 0)
9282 sda = htab->sdata[0].sym;
9283 else if (strcmp (name, ".sdata2") == 0
9284 || strcmp (name, ".sbss2") == 0)
9285 sda = htab->sdata[1].sym;
9286 else
9287 {
9288 _bfd_error_handler
9289 /* xgettext:c-format */
9290 (_("%B: the target (%s) of a %s relocation is "
9291 "in the wrong output section (%s)"),
9292 input_bfd,
9293 sym_name,
9294 howto->name,
9295 name);
9296
9297 bfd_set_error (bfd_error_bad_value);
9298 ret = FALSE;
9299 goto copy_reloc;
9300 }
9301
9302 if (sda == NULL || !is_static_defined (sda))
9303 {
9304 unresolved_reloc = TRUE;
9305 break;
9306 }
9307 value = relocation + addend - SYM_VAL (sda);
9308
9309 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9310 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9311 contents + rel->r_offset, value,
9312 split16a_type,
9313 htab->params->vle_reloc_fixup);
9314 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9315 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9316 contents + rel->r_offset, value,
9317 split16d_type,
9318 htab->params->vle_reloc_fixup);
9319 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9320 {
9321 value = value >> 16;
9322 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9323 contents + rel->r_offset, value,
9324 split16a_type,
9325 htab->params->vle_reloc_fixup);
9326 }
9327 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9328 {
9329 value = value >> 16;
9330 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9331 contents + rel->r_offset, value,
9332 split16d_type,
9333 htab->params->vle_reloc_fixup);
9334 }
9335 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9336 {
9337 value = (value + 0x8000) >> 16;
9338 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9339 contents + rel->r_offset, value,
9340 split16a_type,
9341 htab->params->vle_reloc_fixup);
9342 }
9343 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9344 {
9345 value = (value + 0x8000) >> 16;
9346 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9347 contents + rel->r_offset, value,
9348 split16d_type,
9349 htab->params->vle_reloc_fixup);
9350 }
9351 }
9352 goto copy_reloc;
9353
9354 case R_PPC_VLE_ADDR20:
9355 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9356 continue;
9357
9358 /* Relocate against the beginning of the section. */
9359 case R_PPC_SECTOFF:
9360 case R_PPC_SECTOFF_LO:
9361 case R_PPC_SECTOFF_HI:
9362 case R_PPC_SECTOFF_HA:
9363 if (sec == NULL || sec->output_section == NULL)
9364 {
9365 unresolved_reloc = TRUE;
9366 break;
9367 }
9368 addend -= sec->output_section->vma;
9369 break;
9370
9371 /* Negative relocations. */
9372 case R_PPC_EMB_NADDR32:
9373 case R_PPC_EMB_NADDR16:
9374 case R_PPC_EMB_NADDR16_LO:
9375 case R_PPC_EMB_NADDR16_HI:
9376 case R_PPC_EMB_NADDR16_HA:
9377 addend -= 2 * relocation;
9378 break;
9379
9380 case R_PPC_COPY:
9381 case R_PPC_GLOB_DAT:
9382 case R_PPC_JMP_SLOT:
9383 case R_PPC_RELATIVE:
9384 case R_PPC_IRELATIVE:
9385 case R_PPC_PLT32:
9386 case R_PPC_PLTREL32:
9387 case R_PPC_PLT16_LO:
9388 case R_PPC_PLT16_HI:
9389 case R_PPC_PLT16_HA:
9390 case R_PPC_ADDR30:
9391 case R_PPC_EMB_RELSEC16:
9392 case R_PPC_EMB_RELST_LO:
9393 case R_PPC_EMB_RELST_HI:
9394 case R_PPC_EMB_RELST_HA:
9395 case R_PPC_EMB_BIT_FLD:
9396 info->callbacks->einfo
9397 /* xgettext:c-format */
9398 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9399 input_bfd,
9400 howto->name,
9401 sym_name);
9402
9403 bfd_set_error (bfd_error_invalid_operation);
9404 ret = FALSE;
9405 goto copy_reloc;
9406 }
9407
9408 /* Do any further special processing. */
9409 switch (r_type)
9410 {
9411 default:
9412 break;
9413
9414 case R_PPC_ADDR16_HA:
9415 case R_PPC_REL16_HA:
9416 case R_PPC_REL16DX_HA:
9417 case R_PPC_SECTOFF_HA:
9418 case R_PPC_TPREL16_HA:
9419 case R_PPC_DTPREL16_HA:
9420 case R_PPC_EMB_NADDR16_HA:
9421 case R_PPC_EMB_RELST_HA:
9422 /* It's just possible that this symbol is a weak symbol
9423 that's not actually defined anywhere. In that case,
9424 'sec' would be NULL, and we should leave the symbol
9425 alone (it will be set to zero elsewhere in the link). */
9426 if (sec == NULL)
9427 break;
9428 /* Fall through. */
9429
9430 case R_PPC_PLT16_HA:
9431 case R_PPC_GOT16_HA:
9432 case R_PPC_GOT_TLSGD16_HA:
9433 case R_PPC_GOT_TLSLD16_HA:
9434 case R_PPC_GOT_TPREL16_HA:
9435 case R_PPC_GOT_DTPREL16_HA:
9436 /* Add 0x10000 if sign bit in 0:15 is set.
9437 Bits 0:15 are not used. */
9438 addend += 0x8000;
9439 break;
9440
9441 case R_PPC_ADDR16:
9442 case R_PPC_ADDR16_LO:
9443 case R_PPC_GOT16:
9444 case R_PPC_GOT16_LO:
9445 case R_PPC_SDAREL16:
9446 case R_PPC_SECTOFF:
9447 case R_PPC_SECTOFF_LO:
9448 case R_PPC_DTPREL16:
9449 case R_PPC_DTPREL16_LO:
9450 case R_PPC_TPREL16:
9451 case R_PPC_TPREL16_LO:
9452 case R_PPC_GOT_TLSGD16:
9453 case R_PPC_GOT_TLSGD16_LO:
9454 case R_PPC_GOT_TLSLD16:
9455 case R_PPC_GOT_TLSLD16_LO:
9456 case R_PPC_GOT_DTPREL16:
9457 case R_PPC_GOT_DTPREL16_LO:
9458 case R_PPC_GOT_TPREL16:
9459 case R_PPC_GOT_TPREL16_LO:
9460 {
9461 /* The 32-bit ABI lacks proper relocations to deal with
9462 certain 64-bit instructions. Prevent damage to bits
9463 that make up part of the insn opcode. */
9464 unsigned int insn, mask, lobit;
9465
9466 insn = bfd_get_32 (input_bfd,
9467 contents + rel->r_offset - d_offset);
9468 mask = 0;
9469 if (is_insn_ds_form (insn))
9470 mask = 3;
9471 else if (is_insn_dq_form (insn))
9472 mask = 15;
9473 else
9474 break;
9475 relocation += addend;
9476 addend = insn & mask;
9477 lobit = mask & relocation;
9478 if (lobit != 0)
9479 {
9480 relocation ^= lobit;
9481 info->callbacks->einfo
9482 /* xgettext:c-format */
9483 (_("%H: error: %s against `%s' not a multiple of %u\n"),
9484 input_bfd, input_section, rel->r_offset,
9485 howto->name, sym_name, mask + 1);
9486 bfd_set_error (bfd_error_bad_value);
9487 ret = FALSE;
9488 }
9489 }
9490 break;
9491 }
9492
9493 #ifdef DEBUG
9494 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9495 "offset = %ld, addend = %ld\n",
9496 howto->name,
9497 (int) r_type,
9498 sym_name,
9499 r_symndx,
9500 (long) rel->r_offset,
9501 (long) addend);
9502 #endif
9503
9504 if (unresolved_reloc
9505 && !((input_section->flags & SEC_DEBUGGING) != 0
9506 && h->def_dynamic)
9507 && _bfd_elf_section_offset (output_bfd, info, input_section,
9508 rel->r_offset) != (bfd_vma) -1)
9509 {
9510 info->callbacks->einfo
9511 /* xgettext:c-format */
9512 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
9513 input_bfd, input_section, rel->r_offset,
9514 howto->name,
9515 sym_name);
9516 ret = FALSE;
9517 }
9518
9519 /* 16-bit fields in insns mostly have signed values, but a
9520 few insns have 16-bit unsigned values. Really, we should
9521 have different reloc types. */
9522 if (howto->complain_on_overflow != complain_overflow_dont
9523 && howto->dst_mask == 0xffff
9524 && (input_section->flags & SEC_CODE) != 0)
9525 {
9526 enum complain_overflow complain = complain_overflow_signed;
9527
9528 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9529 {
9530 unsigned int insn;
9531
9532 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9533 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9534 complain = complain_overflow_bitfield;
9535 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9536 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9537 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9538 complain = complain_overflow_unsigned;
9539 }
9540 if (howto->complain_on_overflow != complain)
9541 {
9542 alt_howto = *howto;
9543 alt_howto.complain_on_overflow = complain;
9544 howto = &alt_howto;
9545 }
9546 }
9547
9548 if (r_type == R_PPC_REL16DX_HA)
9549 {
9550 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9551 if (rel->r_offset + 4 > input_section->size)
9552 r = bfd_reloc_outofrange;
9553 else
9554 {
9555 unsigned int insn;
9556
9557 relocation += addend;
9558 relocation -= (rel->r_offset
9559 + input_section->output_offset
9560 + input_section->output_section->vma);
9561 relocation >>= 16;
9562 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9563 insn &= ~0x1fffc1;
9564 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9565 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9566 r = bfd_reloc_ok;
9567 }
9568 }
9569 else
9570 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9571 rel->r_offset, relocation, addend);
9572
9573 if (r != bfd_reloc_ok)
9574 {
9575 if (r == bfd_reloc_overflow)
9576 {
9577 overflow:
9578 /* On code like "if (foo) foo();" don't report overflow
9579 on a branch to zero when foo is undefined. */
9580 if (!warned
9581 && !(h != NULL
9582 && (h->root.type == bfd_link_hash_undefweak
9583 || h->root.type == bfd_link_hash_undefined)
9584 && is_branch_reloc (r_type)))
9585 info->callbacks->reloc_overflow
9586 (info, (h ? &h->root : NULL), sym_name, howto->name,
9587 rel->r_addend, input_bfd, input_section, rel->r_offset);
9588 }
9589 else
9590 {
9591 info->callbacks->einfo
9592 /* xgettext:c-format */
9593 (_("%H: %s reloc against `%s': error %d\n"),
9594 input_bfd, input_section, rel->r_offset,
9595 howto->name, sym_name, (int) r);
9596 ret = FALSE;
9597 }
9598 }
9599 copy_reloc:
9600 if (wrel != rel)
9601 *wrel = *rel;
9602 }
9603
9604 if (wrel != rel)
9605 {
9606 Elf_Internal_Shdr *rel_hdr;
9607 size_t deleted = rel - wrel;
9608
9609 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9610 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9611 if (rel_hdr->sh_size == 0)
9612 {
9613 /* It is too late to remove an empty reloc section. Leave
9614 one NONE reloc.
9615 ??? What is wrong with an empty section??? */
9616 rel_hdr->sh_size = rel_hdr->sh_entsize;
9617 deleted -= 1;
9618 wrel++;
9619 }
9620 relend = wrel;
9621 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9622 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9623 input_section->reloc_count -= deleted;
9624 }
9625
9626 #ifdef DEBUG
9627 fprintf (stderr, "\n");
9628 #endif
9629
9630 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9631 && input_section->size != input_section->rawsize
9632 && (strcmp (input_section->output_section->name, ".init") == 0
9633 || strcmp (input_section->output_section->name, ".fini") == 0))
9634 {
9635 /* Branch around the trampolines. */
9636 unsigned int insn = B + input_section->size - input_section->rawsize;
9637 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9638 }
9639
9640 if (htab->params->ppc476_workaround
9641 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9642 && (!bfd_link_relocatable (info)
9643 || (input_section->output_section->alignment_power
9644 >= htab->params->pagesize_p2)))
9645 {
9646 bfd_vma start_addr, end_addr, addr;
9647 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9648
9649 if (relax_info->workaround_size != 0)
9650 {
9651 bfd_byte *p;
9652 unsigned int n;
9653 bfd_byte fill[4];
9654
9655 bfd_put_32 (input_bfd, BA, fill);
9656 p = contents + input_section->size - relax_info->workaround_size;
9657 n = relax_info->workaround_size >> 2;
9658 while (n--)
9659 {
9660 memcpy (p, fill, 4);
9661 p += 4;
9662 }
9663 }
9664
9665 /* The idea is: Replace the last instruction on a page with a
9666 branch to a patch area. Put the insn there followed by a
9667 branch back to the next page. Complicated a little by
9668 needing to handle moved conditional branches, and by not
9669 wanting to touch data-in-text. */
9670
9671 start_addr = (input_section->output_section->vma
9672 + input_section->output_offset);
9673 end_addr = (start_addr + input_section->size
9674 - relax_info->workaround_size);
9675 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9676 addr < end_addr;
9677 addr += pagesize)
9678 {
9679 bfd_vma offset = addr - start_addr;
9680 Elf_Internal_Rela *lo, *hi;
9681 bfd_boolean is_data;
9682 bfd_vma patch_off, patch_addr;
9683 unsigned int insn;
9684
9685 /* Do we have a data reloc at this offset? If so, leave
9686 the word alone. */
9687 is_data = FALSE;
9688 lo = relocs;
9689 hi = relend;
9690 rel = NULL;
9691 while (lo < hi)
9692 {
9693 rel = lo + (hi - lo) / 2;
9694 if (rel->r_offset < offset)
9695 lo = rel + 1;
9696 else if (rel->r_offset > offset + 3)
9697 hi = rel;
9698 else
9699 {
9700 switch (ELF32_R_TYPE (rel->r_info))
9701 {
9702 case R_PPC_ADDR32:
9703 case R_PPC_UADDR32:
9704 case R_PPC_REL32:
9705 case R_PPC_ADDR30:
9706 is_data = TRUE;
9707 break;
9708 default:
9709 break;
9710 }
9711 break;
9712 }
9713 }
9714 if (is_data)
9715 continue;
9716
9717 /* Some instructions can be left alone too. Unconditional
9718 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9719 avoid the icache failure.
9720
9721 The problem occurs due to prefetch across a page boundary
9722 where stale instructions can be fetched from the next
9723 page, and the mechanism for flushing these bad
9724 instructions fails under certain circumstances. The
9725 unconditional branches:
9726 1) Branch: b, bl, ba, bla,
9727 2) Branch Conditional: bc, bca, bcl, bcla,
9728 3) Branch Conditional to Link Register: bclr, bclrl,
9729 where (2) and (3) have BO=0x14 making them unconditional,
9730 prevent the bad prefetch because the prefetch itself is
9731 affected by these instructions. This happens even if the
9732 instruction is not executed.
9733
9734 A bctr example:
9735 .
9736 . lis 9,new_page@ha
9737 . addi 9,9,new_page@l
9738 . mtctr 9
9739 . bctr
9740 . nop
9741 . nop
9742 . new_page:
9743 .
9744 The bctr is not predicted taken due to ctr not being
9745 ready, so prefetch continues on past the bctr into the
9746 new page which might have stale instructions. If they
9747 fail to be flushed, then they will be executed after the
9748 bctr executes. Either of the following modifications
9749 prevent the bad prefetch from happening in the first
9750 place:
9751 .
9752 . lis 9,new_page@ha lis 9,new_page@ha
9753 . addi 9,9,new_page@l addi 9,9,new_page@l
9754 . mtctr 9 mtctr 9
9755 . bctr bctr
9756 . nop b somewhere_else
9757 . b somewhere_else nop
9758 . new_page: new_page:
9759 . */
9760 insn = bfd_get_32 (input_bfd, contents + offset);
9761 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9762 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9763 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9764 || ((insn & (0x3f << 26)) == (19u << 26)
9765 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9766 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9767 continue;
9768
9769 patch_addr = (start_addr + input_section->size
9770 - relax_info->workaround_size);
9771 patch_addr = (patch_addr + 15) & -16;
9772 patch_off = patch_addr - start_addr;
9773 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9774
9775 if (rel != NULL
9776 && rel->r_offset >= offset
9777 && rel->r_offset < offset + 4)
9778 {
9779 asection *sreloc;
9780
9781 /* If the insn we are patching had a reloc, adjust the
9782 reloc r_offset so that the reloc applies to the moved
9783 location. This matters for -r and --emit-relocs. */
9784 if (rel + 1 != relend)
9785 {
9786 Elf_Internal_Rela tmp = *rel;
9787
9788 /* Keep the relocs sorted by r_offset. */
9789 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9790 relend[-1] = tmp;
9791 }
9792 relend[-1].r_offset += patch_off - offset;
9793
9794 /* Adjust REL16 addends too. */
9795 switch (ELF32_R_TYPE (relend[-1].r_info))
9796 {
9797 case R_PPC_REL16:
9798 case R_PPC_REL16_LO:
9799 case R_PPC_REL16_HI:
9800 case R_PPC_REL16_HA:
9801 relend[-1].r_addend += patch_off - offset;
9802 break;
9803 default:
9804 break;
9805 }
9806
9807 /* If we are building a PIE or shared library with
9808 non-PIC objects, perhaps we had a dynamic reloc too?
9809 If so, the dynamic reloc must move with the insn. */
9810 sreloc = elf_section_data (input_section)->sreloc;
9811 if (sreloc != NULL)
9812 {
9813 Elf32_External_Rela *slo, *shi, *srelend;
9814 bfd_vma soffset;
9815
9816 slo = (Elf32_External_Rela *) sreloc->contents;
9817 shi = srelend = slo + sreloc->reloc_count;
9818 soffset = (offset + input_section->output_section->vma
9819 + input_section->output_offset);
9820 while (slo < shi)
9821 {
9822 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9823 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9824 &outrel);
9825 if (outrel.r_offset < soffset)
9826 slo = srel + 1;
9827 else if (outrel.r_offset > soffset + 3)
9828 shi = srel;
9829 else
9830 {
9831 if (srel + 1 != srelend)
9832 {
9833 memmove (srel, srel + 1,
9834 (srelend - (srel + 1)) * sizeof (*srel));
9835 srel = srelend - 1;
9836 }
9837 outrel.r_offset += patch_off - offset;
9838 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9839 (bfd_byte *) srel);
9840 break;
9841 }
9842 }
9843 }
9844 }
9845 else
9846 rel = NULL;
9847
9848 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9849 && (insn & 2) == 0 /* relative */)
9850 {
9851 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9852
9853 delta += offset - patch_off;
9854 if (bfd_link_relocatable (info) && rel != NULL)
9855 delta = 0;
9856 if (!bfd_link_relocatable (info) && rel != NULL)
9857 {
9858 enum elf_ppc_reloc_type r_type;
9859
9860 r_type = ELF32_R_TYPE (relend[-1].r_info);
9861 if (r_type == R_PPC_REL14_BRTAKEN)
9862 insn |= BRANCH_PREDICT_BIT;
9863 else if (r_type == R_PPC_REL14_BRNTAKEN)
9864 insn &= ~BRANCH_PREDICT_BIT;
9865 else
9866 BFD_ASSERT (r_type == R_PPC_REL14);
9867
9868 if ((r_type == R_PPC_REL14_BRTAKEN
9869 || r_type == R_PPC_REL14_BRNTAKEN)
9870 && delta + 0x8000 < 0x10000
9871 && (bfd_signed_vma) delta < 0)
9872 insn ^= BRANCH_PREDICT_BIT;
9873 }
9874 if (delta + 0x8000 < 0x10000)
9875 {
9876 bfd_put_32 (input_bfd,
9877 (insn & ~0xfffc) | (delta & 0xfffc),
9878 contents + patch_off);
9879 patch_off += 4;
9880 bfd_put_32 (input_bfd,
9881 B | ((offset + 4 - patch_off) & 0x3fffffc),
9882 contents + patch_off);
9883 patch_off += 4;
9884 }
9885 else
9886 {
9887 if (rel != NULL)
9888 {
9889 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9890
9891 relend[-1].r_offset += 8;
9892 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9893 }
9894 bfd_put_32 (input_bfd,
9895 (insn & ~0xfffc) | 8,
9896 contents + patch_off);
9897 patch_off += 4;
9898 bfd_put_32 (input_bfd,
9899 B | ((offset + 4 - patch_off) & 0x3fffffc),
9900 contents + patch_off);
9901 patch_off += 4;
9902 bfd_put_32 (input_bfd,
9903 B | ((delta - 8) & 0x3fffffc),
9904 contents + patch_off);
9905 patch_off += 4;
9906 }
9907 }
9908 else
9909 {
9910 bfd_put_32 (input_bfd, insn, contents + patch_off);
9911 patch_off += 4;
9912 bfd_put_32 (input_bfd,
9913 B | ((offset + 4 - patch_off) & 0x3fffffc),
9914 contents + patch_off);
9915 patch_off += 4;
9916 }
9917 BFD_ASSERT (patch_off <= input_section->size);
9918 relax_info->workaround_size = input_section->size - patch_off;
9919 }
9920 }
9921
9922 return ret;
9923 }
9924 \f
9925 /* Finish up dynamic symbol handling. We set the contents of various
9926 dynamic sections here. */
9927
9928 static bfd_boolean
9929 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9930 struct bfd_link_info *info,
9931 struct elf_link_hash_entry *h,
9932 Elf_Internal_Sym *sym)
9933 {
9934 struct ppc_elf_link_hash_table *htab;
9935 struct plt_entry *ent;
9936 bfd_boolean doneone;
9937
9938 #ifdef DEBUG
9939 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9940 h->root.root.string);
9941 #endif
9942
9943 htab = ppc_elf_hash_table (info);
9944 BFD_ASSERT (htab->elf.dynobj != NULL);
9945
9946 doneone = FALSE;
9947 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9948 if (ent->plt.offset != (bfd_vma) -1)
9949 {
9950 if (!doneone)
9951 {
9952 Elf_Internal_Rela rela;
9953 bfd_byte *loc;
9954 bfd_vma reloc_index;
9955
9956 if (htab->plt_type == PLT_NEW
9957 || !htab->elf.dynamic_sections_created
9958 || h->dynindx == -1)
9959 reloc_index = ent->plt.offset / 4;
9960 else
9961 {
9962 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9963 / htab->plt_slot_size);
9964 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9965 && htab->plt_type == PLT_OLD)
9966 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9967 }
9968
9969 /* This symbol has an entry in the procedure linkage table.
9970 Set it up. */
9971 if (htab->plt_type == PLT_VXWORKS
9972 && htab->elf.dynamic_sections_created
9973 && h->dynindx != -1)
9974 {
9975 bfd_vma got_offset;
9976 const bfd_vma *plt_entry;
9977
9978 /* The first three entries in .got.plt are reserved. */
9979 got_offset = (reloc_index + 3) * 4;
9980
9981 /* Use the right PLT. */
9982 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
9983 : ppc_elf_vxworks_plt_entry;
9984
9985 /* Fill in the .plt on VxWorks. */
9986 if (bfd_link_pic (info))
9987 {
9988 bfd_put_32 (output_bfd,
9989 plt_entry[0] | PPC_HA (got_offset),
9990 htab->elf.splt->contents + ent->plt.offset + 0);
9991 bfd_put_32 (output_bfd,
9992 plt_entry[1] | PPC_LO (got_offset),
9993 htab->elf.splt->contents + ent->plt.offset + 4);
9994 }
9995 else
9996 {
9997 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9998
9999 bfd_put_32 (output_bfd,
10000 plt_entry[0] | PPC_HA (got_loc),
10001 htab->elf.splt->contents + ent->plt.offset + 0);
10002 bfd_put_32 (output_bfd,
10003 plt_entry[1] | PPC_LO (got_loc),
10004 htab->elf.splt->contents + ent->plt.offset + 4);
10005 }
10006
10007 bfd_put_32 (output_bfd, plt_entry[2],
10008 htab->elf.splt->contents + ent->plt.offset + 8);
10009 bfd_put_32 (output_bfd, plt_entry[3],
10010 htab->elf.splt->contents + ent->plt.offset + 12);
10011
10012 /* This instruction is an immediate load. The value loaded is
10013 the byte offset of the R_PPC_JMP_SLOT relocation from the
10014 start of the .rela.plt section. The value is stored in the
10015 low-order 16 bits of the load instruction. */
10016 /* NOTE: It appears that this is now an index rather than a
10017 prescaled offset. */
10018 bfd_put_32 (output_bfd,
10019 plt_entry[4] | reloc_index,
10020 htab->elf.splt->contents + ent->plt.offset + 16);
10021 /* This instruction is a PC-relative branch whose target is
10022 the start of the PLT section. The address of this branch
10023 instruction is 20 bytes beyond the start of this PLT entry.
10024 The address is encoded in bits 6-29, inclusive. The value
10025 stored is right-shifted by two bits, permitting a 26-bit
10026 offset. */
10027 bfd_put_32 (output_bfd,
10028 (plt_entry[5]
10029 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10030 htab->elf.splt->contents + ent->plt.offset + 20);
10031 bfd_put_32 (output_bfd, plt_entry[6],
10032 htab->elf.splt->contents + ent->plt.offset + 24);
10033 bfd_put_32 (output_bfd, plt_entry[7],
10034 htab->elf.splt->contents + ent->plt.offset + 28);
10035
10036 /* Fill in the GOT entry corresponding to this PLT slot with
10037 the address immediately after the "bctr" instruction
10038 in this PLT entry. */
10039 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10040 + htab->elf.splt->output_offset
10041 + ent->plt.offset + 16),
10042 htab->elf.sgotplt->contents + got_offset);
10043
10044 if (!bfd_link_pic (info))
10045 {
10046 /* Fill in a couple of entries in .rela.plt.unloaded. */
10047 loc = htab->srelplt2->contents
10048 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10049 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10050 * sizeof (Elf32_External_Rela));
10051
10052 /* Provide the @ha relocation for the first instruction. */
10053 rela.r_offset = (htab->elf.splt->output_section->vma
10054 + htab->elf.splt->output_offset
10055 + ent->plt.offset + 2);
10056 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10057 R_PPC_ADDR16_HA);
10058 rela.r_addend = got_offset;
10059 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10060 loc += sizeof (Elf32_External_Rela);
10061
10062 /* Provide the @l relocation for the second instruction. */
10063 rela.r_offset = (htab->elf.splt->output_section->vma
10064 + htab->elf.splt->output_offset
10065 + ent->plt.offset + 6);
10066 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10067 R_PPC_ADDR16_LO);
10068 rela.r_addend = got_offset;
10069 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10070 loc += sizeof (Elf32_External_Rela);
10071
10072 /* Provide a relocation for the GOT entry corresponding to this
10073 PLT slot. Point it at the middle of the .plt entry. */
10074 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10075 + htab->elf.sgotplt->output_offset
10076 + got_offset);
10077 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10078 R_PPC_ADDR32);
10079 rela.r_addend = ent->plt.offset + 16;
10080 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10081 }
10082
10083 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10084 In particular, the offset for the relocation is not the
10085 address of the PLT entry for this function, as specified
10086 by the ABI. Instead, the offset is set to the address of
10087 the GOT slot for this function. See EABI 4.4.4.1. */
10088 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10089 + htab->elf.sgotplt->output_offset
10090 + got_offset);
10091
10092 }
10093 else
10094 {
10095 asection *splt = htab->elf.splt;
10096 if (!htab->elf.dynamic_sections_created
10097 || h->dynindx == -1)
10098 splt = htab->elf.iplt;
10099
10100 rela.r_offset = (splt->output_section->vma
10101 + splt->output_offset
10102 + ent->plt.offset);
10103 if (htab->plt_type == PLT_OLD
10104 || !htab->elf.dynamic_sections_created
10105 || h->dynindx == -1)
10106 {
10107 /* We don't need to fill in the .plt. The ppc dynamic
10108 linker will fill it in. */
10109 }
10110 else
10111 {
10112 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10113 + htab->glink->output_section->vma
10114 + htab->glink->output_offset);
10115 bfd_put_32 (output_bfd, val,
10116 splt->contents + ent->plt.offset);
10117 }
10118 }
10119
10120 /* Fill in the entry in the .rela.plt section. */
10121 rela.r_addend = 0;
10122 if (!htab->elf.dynamic_sections_created
10123 || h->dynindx == -1)
10124 {
10125 BFD_ASSERT (h->type == STT_GNU_IFUNC
10126 && h->def_regular
10127 && (h->root.type == bfd_link_hash_defined
10128 || h->root.type == bfd_link_hash_defweak));
10129 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10130 rela.r_addend = SYM_VAL (h);
10131 }
10132 else
10133 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10134
10135 if (!htab->elf.dynamic_sections_created
10136 || h->dynindx == -1)
10137 {
10138 loc = (htab->elf.irelplt->contents
10139 + (htab->elf.irelplt->reloc_count++
10140 * sizeof (Elf32_External_Rela)));
10141 htab->local_ifunc_resolver = 1;
10142 }
10143 else
10144 {
10145 loc = (htab->elf.srelplt->contents
10146 + reloc_index * sizeof (Elf32_External_Rela));
10147 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10148 htab->maybe_local_ifunc_resolver = 1;
10149 }
10150 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10151
10152 if (!h->def_regular)
10153 {
10154 /* Mark the symbol as undefined, rather than as
10155 defined in the .plt section. Leave the value if
10156 there were any relocations where pointer equality
10157 matters (this is a clue for the dynamic linker, to
10158 make function pointer comparisons work between an
10159 application and shared library), otherwise set it
10160 to zero. */
10161 sym->st_shndx = SHN_UNDEF;
10162 if (!h->pointer_equality_needed)
10163 sym->st_value = 0;
10164 else if (!h->ref_regular_nonweak)
10165 {
10166 /* This breaks function pointer comparisons, but
10167 that is better than breaking tests for a NULL
10168 function pointer. */
10169 sym->st_value = 0;
10170 }
10171 }
10172 else if (h->type == STT_GNU_IFUNC
10173 && !bfd_link_pic (info))
10174 {
10175 /* Set the value of ifunc symbols in a non-pie
10176 executable to the glink entry. This is to avoid
10177 text relocations. We can't do this for ifunc in
10178 allocate_dynrelocs, as we do for normal dynamic
10179 function symbols with plt entries, because we need
10180 to keep the original value around for the ifunc
10181 relocation. */
10182 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10183 (output_bfd, htab->glink->output_section));
10184 sym->st_value = (ent->glink_offset
10185 + htab->glink->output_offset
10186 + htab->glink->output_section->vma);
10187 }
10188 doneone = TRUE;
10189 }
10190
10191 if (htab->plt_type == PLT_NEW
10192 || !htab->elf.dynamic_sections_created
10193 || h->dynindx == -1)
10194 {
10195 unsigned char *p;
10196 asection *splt = htab->elf.splt;
10197 if (!htab->elf.dynamic_sections_created
10198 || h->dynindx == -1)
10199 splt = htab->elf.iplt;
10200
10201 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10202
10203 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10204 {
10205 bfd_put_32 (output_bfd, LWZ_11_3, p);
10206 p += 4;
10207 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10208 p += 4;
10209 bfd_put_32 (output_bfd, MR_0_3, p);
10210 p += 4;
10211 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10212 p += 4;
10213 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10214 p += 4;
10215 bfd_put_32 (output_bfd, BEQLR, p);
10216 p += 4;
10217 bfd_put_32 (output_bfd, MR_3_0, p);
10218 p += 4;
10219 bfd_put_32 (output_bfd, NOP, p);
10220 p += 4;
10221 }
10222
10223 write_glink_stub (ent, splt, p, info);
10224
10225 if (!bfd_link_pic (info))
10226 /* We only need one non-PIC glink stub. */
10227 break;
10228 }
10229 else
10230 break;
10231 }
10232
10233 if (h->needs_copy)
10234 {
10235 asection *s;
10236 Elf_Internal_Rela rela;
10237 bfd_byte *loc;
10238
10239 /* This symbols needs a copy reloc. Set it up. */
10240
10241 #ifdef DEBUG
10242 fprintf (stderr, ", copy");
10243 #endif
10244
10245 BFD_ASSERT (h->dynindx != -1);
10246
10247 if (ppc_elf_hash_entry (h)->has_sda_refs)
10248 s = htab->relsbss;
10249 else if (h->root.u.def.section == htab->elf.sdynrelro)
10250 s = htab->elf.sreldynrelro;
10251 else
10252 s = htab->elf.srelbss;
10253 BFD_ASSERT (s != NULL);
10254
10255 rela.r_offset = SYM_VAL (h);
10256 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10257 rela.r_addend = 0;
10258 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10259 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10260 }
10261
10262 #ifdef DEBUG
10263 fprintf (stderr, "\n");
10264 #endif
10265
10266 return TRUE;
10267 }
10268 \f
10269 static enum elf_reloc_type_class
10270 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10271 const asection *rel_sec,
10272 const Elf_Internal_Rela *rela)
10273 {
10274 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10275
10276 if (rel_sec == htab->elf.irelplt)
10277 return reloc_class_ifunc;
10278
10279 switch (ELF32_R_TYPE (rela->r_info))
10280 {
10281 case R_PPC_RELATIVE:
10282 return reloc_class_relative;
10283 case R_PPC_JMP_SLOT:
10284 return reloc_class_plt;
10285 case R_PPC_COPY:
10286 return reloc_class_copy;
10287 default:
10288 return reloc_class_normal;
10289 }
10290 }
10291 \f
10292 /* Finish up the dynamic sections. */
10293
10294 static bfd_boolean
10295 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10296 struct bfd_link_info *info)
10297 {
10298 asection *sdyn;
10299 struct ppc_elf_link_hash_table *htab;
10300 bfd_vma got;
10301 bfd *dynobj;
10302 bfd_boolean ret = TRUE;
10303
10304 #ifdef DEBUG
10305 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10306 #endif
10307
10308 htab = ppc_elf_hash_table (info);
10309 dynobj = htab->elf.dynobj;
10310 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10311
10312 got = 0;
10313 if (htab->elf.hgot != NULL)
10314 got = SYM_VAL (htab->elf.hgot);
10315
10316 if (htab->elf.dynamic_sections_created)
10317 {
10318 Elf32_External_Dyn *dyncon, *dynconend;
10319
10320 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10321
10322 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10323 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10324 for (; dyncon < dynconend; dyncon++)
10325 {
10326 Elf_Internal_Dyn dyn;
10327 asection *s;
10328
10329 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10330
10331 switch (dyn.d_tag)
10332 {
10333 case DT_PLTGOT:
10334 if (htab->is_vxworks)
10335 s = htab->elf.sgotplt;
10336 else
10337 s = htab->elf.splt;
10338 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10339 break;
10340
10341 case DT_PLTRELSZ:
10342 dyn.d_un.d_val = htab->elf.srelplt->size;
10343 break;
10344
10345 case DT_JMPREL:
10346 s = htab->elf.srelplt;
10347 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10348 break;
10349
10350 case DT_PPC_GOT:
10351 dyn.d_un.d_ptr = got;
10352 break;
10353
10354 case DT_TEXTREL:
10355 if (htab->local_ifunc_resolver)
10356 info->callbacks->einfo
10357 (_("%X%P: text relocations and GNU indirect "
10358 "functions will result in a segfault at runtime\n"));
10359 else if (htab->maybe_local_ifunc_resolver)
10360 info->callbacks->einfo
10361 (_("%P: warning: text relocations and GNU indirect "
10362 "functions may result in a segfault at runtime\n"));
10363 continue;
10364
10365 default:
10366 if (htab->is_vxworks
10367 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10368 break;
10369 continue;
10370 }
10371
10372 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10373 }
10374 }
10375
10376 if (htab->elf.sgot != NULL
10377 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
10378 {
10379 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10380 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10381 {
10382 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10383
10384 p += htab->elf.hgot->root.u.def.value;
10385 if (htab->plt_type == PLT_OLD)
10386 {
10387 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10388 so that a function can easily find the address of
10389 _GLOBAL_OFFSET_TABLE_. */
10390 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10391 < htab->elf.hgot->root.u.def.section->size);
10392 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10393 }
10394
10395 if (sdyn != NULL)
10396 {
10397 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10398 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10399 < htab->elf.hgot->root.u.def.section->size);
10400 bfd_put_32 (output_bfd, val, p);
10401 }
10402 }
10403 else
10404 {
10405 /* xgettext:c-format */
10406 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10407 htab->elf.hgot->root.root.string,
10408 (htab->elf.sgotplt != NULL
10409 ? htab->elf.sgotplt->name
10410 : htab->elf.sgot->name));
10411 bfd_set_error (bfd_error_bad_value);
10412 ret = FALSE;
10413 }
10414
10415 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10416 }
10417
10418 /* Fill in the first entry in the VxWorks procedure linkage table. */
10419 if (htab->is_vxworks
10420 && htab->elf.splt != NULL
10421 && htab->elf.splt->size != 0
10422 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10423 {
10424 asection *splt = htab->elf.splt;
10425 /* Use the right PLT. */
10426 const bfd_vma *plt_entry = (bfd_link_pic (info)
10427 ? ppc_elf_vxworks_pic_plt0_entry
10428 : ppc_elf_vxworks_plt0_entry);
10429
10430 if (!bfd_link_pic (info))
10431 {
10432 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10433
10434 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10435 splt->contents + 0);
10436 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10437 splt->contents + 4);
10438 }
10439 else
10440 {
10441 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10442 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10443 }
10444 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10445 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10446 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10447 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10448 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10449 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10450
10451 if (! bfd_link_pic (info))
10452 {
10453 Elf_Internal_Rela rela;
10454 bfd_byte *loc;
10455
10456 loc = htab->srelplt2->contents;
10457
10458 /* Output the @ha relocation for the first instruction. */
10459 rela.r_offset = (htab->elf.splt->output_section->vma
10460 + htab->elf.splt->output_offset
10461 + 2);
10462 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10463 rela.r_addend = 0;
10464 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10465 loc += sizeof (Elf32_External_Rela);
10466
10467 /* Output the @l relocation for the second instruction. */
10468 rela.r_offset = (htab->elf.splt->output_section->vma
10469 + htab->elf.splt->output_offset
10470 + 6);
10471 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10472 rela.r_addend = 0;
10473 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10474 loc += sizeof (Elf32_External_Rela);
10475
10476 /* Fix up the remaining relocations. They may have the wrong
10477 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10478 in which symbols were output. */
10479 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10480 {
10481 Elf_Internal_Rela rel;
10482
10483 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10484 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10485 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10486 loc += sizeof (Elf32_External_Rela);
10487
10488 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10489 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10490 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10491 loc += sizeof (Elf32_External_Rela);
10492
10493 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10494 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10495 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10496 loc += sizeof (Elf32_External_Rela);
10497 }
10498 }
10499 }
10500
10501 if (htab->glink != NULL
10502 && htab->glink->contents != NULL
10503 && htab->elf.dynamic_sections_created)
10504 {
10505 unsigned char *p;
10506 unsigned char *endp;
10507 bfd_vma res0;
10508 unsigned int i;
10509
10510 /*
10511 * PIC glink code is the following:
10512 *
10513 * # ith PLT code stub.
10514 * addis 11,30,(plt+(i-1)*4-got)@ha
10515 * lwz 11,(plt+(i-1)*4-got)@l(11)
10516 * mtctr 11
10517 * bctr
10518 *
10519 * # A table of branches, one for each plt entry.
10520 * # The idea is that the plt call stub loads ctr and r11 with these
10521 * # addresses, so (r11 - res_0) gives the plt index * 4.
10522 * res_0: b PLTresolve
10523 * res_1: b PLTresolve
10524 * .
10525 * # Some number of entries towards the end can be nops
10526 * res_n_m3: nop
10527 * res_n_m2: nop
10528 * res_n_m1:
10529 *
10530 * PLTresolve:
10531 * addis 11,11,(1f-res_0)@ha
10532 * mflr 0
10533 * bcl 20,31,1f
10534 * 1: addi 11,11,(1b-res_0)@l
10535 * mflr 12
10536 * mtlr 0
10537 * sub 11,11,12 # r11 = index * 4
10538 * addis 12,12,(got+4-1b)@ha
10539 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10540 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10541 * mtctr 0
10542 * add 0,11,11
10543 * add 11,0,11 # r11 = index * 12 = reloc offset.
10544 * bctr
10545 */
10546 static const unsigned int pic_plt_resolve[] =
10547 {
10548 ADDIS_11_11,
10549 MFLR_0,
10550 BCL_20_31,
10551 ADDI_11_11,
10552 MFLR_12,
10553 MTLR_0,
10554 SUB_11_11_12,
10555 ADDIS_12_12,
10556 LWZ_0_12,
10557 LWZ_12_12,
10558 MTCTR_0,
10559 ADD_0_11_11,
10560 ADD_11_0_11,
10561 BCTR,
10562 NOP,
10563 NOP
10564 };
10565
10566 /*
10567 * Non-PIC glink code is a little simpler.
10568 *
10569 * # ith PLT code stub.
10570 * lis 11,(plt+(i-1)*4)@ha
10571 * lwz 11,(plt+(i-1)*4)@l(11)
10572 * mtctr 11
10573 * bctr
10574 *
10575 * The branch table is the same, then comes
10576 *
10577 * PLTresolve:
10578 * lis 12,(got+4)@ha
10579 * addis 11,11,(-res_0)@ha
10580 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10581 * addi 11,11,(-res_0)@l # r11 = index * 4
10582 * mtctr 0
10583 * add 0,11,11
10584 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10585 * add 11,0,11 # r11 = index * 12 = reloc offset.
10586 * bctr
10587 */
10588 static const unsigned int plt_resolve[] =
10589 {
10590 LIS_12,
10591 ADDIS_11_11,
10592 LWZ_0_12,
10593 ADDI_11_11,
10594 MTCTR_0,
10595 ADD_0_11_11,
10596 LWZ_12_12,
10597 ADD_11_0_11,
10598 BCTR,
10599 NOP,
10600 NOP,
10601 NOP,
10602 NOP,
10603 NOP,
10604 NOP,
10605 NOP
10606 };
10607
10608 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10609 abort ();
10610 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10611 abort ();
10612
10613 /* Build the branch table, one for each plt entry (less one),
10614 and perhaps some padding. */
10615 p = htab->glink->contents;
10616 p += htab->glink_pltresolve;
10617 endp = htab->glink->contents;
10618 endp += htab->glink->size - GLINK_PLTRESOLVE;
10619 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10620 {
10621 bfd_put_32 (output_bfd, B + endp - p, p);
10622 p += 4;
10623 }
10624 while (p < endp)
10625 {
10626 bfd_put_32 (output_bfd, NOP, p);
10627 p += 4;
10628 }
10629
10630 res0 = (htab->glink_pltresolve
10631 + htab->glink->output_section->vma
10632 + htab->glink->output_offset);
10633
10634 if (htab->params->ppc476_workaround)
10635 {
10636 /* Ensure that a call stub at the end of a page doesn't
10637 result in prefetch over the end of the page into the
10638 glink branch table. */
10639 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10640 bfd_vma page_addr;
10641 bfd_vma glink_start = (htab->glink->output_section->vma
10642 + htab->glink->output_offset);
10643
10644 for (page_addr = res0 & -pagesize;
10645 page_addr > glink_start;
10646 page_addr -= pagesize)
10647 {
10648 /* We have a plt call stub that may need fixing. */
10649 bfd_byte *loc;
10650 unsigned int insn;
10651
10652 loc = htab->glink->contents + page_addr - 4 - glink_start;
10653 insn = bfd_get_32 (output_bfd, loc);
10654 if (insn == BCTR)
10655 {
10656 /* By alignment, we know that there must be at least
10657 one other call stub before this one. */
10658 insn = bfd_get_32 (output_bfd, loc - 16);
10659 if (insn == BCTR)
10660 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10661 else
10662 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10663 }
10664 }
10665 }
10666
10667 /* Last comes the PLTresolve stub. */
10668 if (bfd_link_pic (info))
10669 {
10670 bfd_vma bcl;
10671
10672 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10673 {
10674 unsigned int insn = pic_plt_resolve[i];
10675
10676 if (htab->params->ppc476_workaround && insn == NOP)
10677 insn = BA + 0;
10678 bfd_put_32 (output_bfd, insn, p);
10679 p += 4;
10680 }
10681 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10682
10683 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10684 + htab->glink->output_section->vma
10685 + htab->glink->output_offset);
10686
10687 bfd_put_32 (output_bfd,
10688 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10689 bfd_put_32 (output_bfd,
10690 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10691 bfd_put_32 (output_bfd,
10692 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10693 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10694 {
10695 bfd_put_32 (output_bfd,
10696 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10697 bfd_put_32 (output_bfd,
10698 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10699 }
10700 else
10701 {
10702 bfd_put_32 (output_bfd,
10703 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10704 bfd_put_32 (output_bfd,
10705 LWZ_12_12 + 4, p + 9*4);
10706 }
10707 }
10708 else
10709 {
10710 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10711 {
10712 unsigned int insn = plt_resolve[i];
10713
10714 if (htab->params->ppc476_workaround && insn == NOP)
10715 insn = BA + 0;
10716 bfd_put_32 (output_bfd, insn, p);
10717 p += 4;
10718 }
10719 p -= 4 * ARRAY_SIZE (plt_resolve);
10720
10721 bfd_put_32 (output_bfd,
10722 LIS_12 + PPC_HA (got + 4), p + 0*4);
10723 bfd_put_32 (output_bfd,
10724 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10725 bfd_put_32 (output_bfd,
10726 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10727 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10728 {
10729 bfd_put_32 (output_bfd,
10730 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10731 bfd_put_32 (output_bfd,
10732 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10733 }
10734 else
10735 {
10736 bfd_put_32 (output_bfd,
10737 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10738 bfd_put_32 (output_bfd,
10739 LWZ_12_12 + 4, p + 6*4);
10740 }
10741 }
10742 }
10743
10744 if (htab->glink_eh_frame != NULL
10745 && htab->glink_eh_frame->contents != NULL)
10746 {
10747 unsigned char *p = htab->glink_eh_frame->contents;
10748 bfd_vma val;
10749
10750 p += sizeof (glink_eh_frame_cie);
10751 /* FDE length. */
10752 p += 4;
10753 /* CIE pointer. */
10754 p += 4;
10755 /* Offset to .glink. */
10756 val = (htab->glink->output_section->vma
10757 + htab->glink->output_offset);
10758 val -= (htab->glink_eh_frame->output_section->vma
10759 + htab->glink_eh_frame->output_offset);
10760 val -= p - htab->glink_eh_frame->contents;
10761 bfd_put_32 (htab->elf.dynobj, val, p);
10762
10763 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10764 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10765 htab->glink_eh_frame,
10766 htab->glink_eh_frame->contents))
10767 return FALSE;
10768 }
10769
10770 return ret;
10771 }
10772 \f
10773 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10774 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10775 #define TARGET_BIG_SYM powerpc_elf32_vec
10776 #define TARGET_BIG_NAME "elf32-powerpc"
10777 #define ELF_ARCH bfd_arch_powerpc
10778 #define ELF_TARGET_ID PPC32_ELF_DATA
10779 #define ELF_MACHINE_CODE EM_PPC
10780 #ifdef __QNXTARGET__
10781 #define ELF_MAXPAGESIZE 0x1000
10782 #define ELF_COMMONPAGESIZE 0x1000
10783 #else
10784 #define ELF_MAXPAGESIZE 0x10000
10785 #define ELF_COMMONPAGESIZE 0x10000
10786 #endif
10787 #define ELF_MINPAGESIZE 0x1000
10788 #define elf_info_to_howto ppc_elf_info_to_howto
10789
10790 #ifdef EM_CYGNUS_POWERPC
10791 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10792 #endif
10793
10794 #ifdef EM_PPC_OLD
10795 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10796 #endif
10797
10798 #define elf_backend_plt_not_loaded 1
10799 #define elf_backend_want_dynrelro 1
10800 #define elf_backend_can_gc_sections 1
10801 #define elf_backend_can_refcount 1
10802 #define elf_backend_rela_normal 1
10803 #define elf_backend_caches_rawsize 1
10804
10805 #define bfd_elf32_mkobject ppc_elf_mkobject
10806 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10807 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10808 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10809 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10810 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10811 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10812 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10813
10814 #define elf_backend_object_p ppc_elf_object_p
10815 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10816 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10817 #define elf_backend_relocate_section ppc_elf_relocate_section
10818 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10819 #define elf_backend_check_relocs ppc_elf_check_relocs
10820 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
10821 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10822 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10823 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10824 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10825 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10826 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10827 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10828 #define elf_backend_fake_sections ppc_elf_fake_sections
10829 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10830 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10831 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10832 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10833 #define elf_backend_write_core_note ppc_elf_write_core_note
10834 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10835 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10836 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10837 #define elf_backend_write_section ppc_elf_write_section
10838 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10839 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10840 #define elf_backend_action_discarded ppc_elf_action_discarded
10841 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10842 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10843
10844 #include "elf32-target.h"
10845
10846 /* FreeBSD Target */
10847
10848 #undef TARGET_LITTLE_SYM
10849 #undef TARGET_LITTLE_NAME
10850
10851 #undef TARGET_BIG_SYM
10852 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10853 #undef TARGET_BIG_NAME
10854 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10855
10856 #undef ELF_OSABI
10857 #define ELF_OSABI ELFOSABI_FREEBSD
10858
10859 #undef elf32_bed
10860 #define elf32_bed elf32_powerpc_fbsd_bed
10861
10862 #include "elf32-target.h"
10863
10864 /* VxWorks Target */
10865
10866 #undef TARGET_LITTLE_SYM
10867 #undef TARGET_LITTLE_NAME
10868
10869 #undef TARGET_BIG_SYM
10870 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10871 #undef TARGET_BIG_NAME
10872 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10873
10874 #undef ELF_OSABI
10875
10876 /* VxWorks uses the elf default section flags for .plt. */
10877 static const struct bfd_elf_special_section *
10878 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
10879 {
10880 if (sec->name == NULL)
10881 return NULL;
10882
10883 if (strcmp (sec->name, ".plt") == 0)
10884 return _bfd_elf_get_sec_type_attr (abfd, sec);
10885
10886 return ppc_elf_get_sec_type_attr (abfd, sec);
10887 }
10888
10889 /* Like ppc_elf_link_hash_table_create, but overrides
10890 appropriately for VxWorks. */
10891 static struct bfd_link_hash_table *
10892 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10893 {
10894 struct bfd_link_hash_table *ret;
10895
10896 ret = ppc_elf_link_hash_table_create (abfd);
10897 if (ret)
10898 {
10899 struct ppc_elf_link_hash_table *htab
10900 = (struct ppc_elf_link_hash_table *)ret;
10901 htab->is_vxworks = 1;
10902 htab->plt_type = PLT_VXWORKS;
10903 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10904 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10905 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10906 }
10907 return ret;
10908 }
10909
10910 /* Tweak magic VxWorks symbols as they are loaded. */
10911 static bfd_boolean
10912 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10913 struct bfd_link_info *info,
10914 Elf_Internal_Sym *sym,
10915 const char **namep,
10916 flagword *flagsp,
10917 asection **secp,
10918 bfd_vma *valp)
10919 {
10920 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
10921 valp))
10922 return FALSE;
10923
10924 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
10925 }
10926
10927 static void
10928 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10929 {
10930 ppc_elf_final_write_processing (abfd, linker);
10931 elf_vxworks_final_write_processing (abfd, linker);
10932 }
10933
10934 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10935 define it. */
10936 #undef elf_backend_want_plt_sym
10937 #define elf_backend_want_plt_sym 1
10938 #undef elf_backend_want_got_plt
10939 #define elf_backend_want_got_plt 1
10940 #undef elf_backend_got_symbol_offset
10941 #define elf_backend_got_symbol_offset 0
10942 #undef elf_backend_plt_not_loaded
10943 #define elf_backend_plt_not_loaded 0
10944 #undef elf_backend_plt_readonly
10945 #define elf_backend_plt_readonly 1
10946 #undef elf_backend_got_header_size
10947 #define elf_backend_got_header_size 12
10948 #undef elf_backend_dtrel_excludes_plt
10949 #define elf_backend_dtrel_excludes_plt 1
10950
10951 #undef bfd_elf32_get_synthetic_symtab
10952
10953 #undef bfd_elf32_bfd_link_hash_table_create
10954 #define bfd_elf32_bfd_link_hash_table_create \
10955 ppc_elf_vxworks_link_hash_table_create
10956 #undef elf_backend_add_symbol_hook
10957 #define elf_backend_add_symbol_hook \
10958 ppc_elf_vxworks_add_symbol_hook
10959 #undef elf_backend_link_output_symbol_hook
10960 #define elf_backend_link_output_symbol_hook \
10961 elf_vxworks_link_output_symbol_hook
10962 #undef elf_backend_final_write_processing
10963 #define elf_backend_final_write_processing \
10964 ppc_elf_vxworks_final_write_processing
10965 #undef elf_backend_get_sec_type_attr
10966 #define elf_backend_get_sec_type_attr \
10967 ppc_elf_vxworks_get_sec_type_attr
10968 #undef elf_backend_emit_relocs
10969 #define elf_backend_emit_relocs \
10970 elf_vxworks_emit_relocs
10971
10972 #undef elf32_bed
10973 #define elf32_bed ppc_elf_vxworks_bed
10974 #undef elf_backend_post_process_headers
10975
10976 #include "elf32-target.h"
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