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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 we were called to copy over info for a weak sym, that's all. */
3598 if (eind->elf.root.type != bfd_link_hash_indirect)
3599 return;
3600
3601 if (eind->dyn_relocs != NULL)
3602 {
3603 if (edir->dyn_relocs != NULL)
3604 {
3605 struct elf_dyn_relocs **pp;
3606 struct elf_dyn_relocs *p;
3607
3608 /* Add reloc counts against the indirect sym to the direct sym
3609 list. Merge any entries against the same section. */
3610 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3611 {
3612 struct elf_dyn_relocs *q;
3613
3614 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3615 if (q->sec == p->sec)
3616 {
3617 q->pc_count += p->pc_count;
3618 q->count += p->count;
3619 *pp = p->next;
3620 break;
3621 }
3622 if (q == NULL)
3623 pp = &p->next;
3624 }
3625 *pp = edir->dyn_relocs;
3626 }
3627
3628 edir->dyn_relocs = eind->dyn_relocs;
3629 eind->dyn_relocs = NULL;
3630 }
3631
3632 /* Copy over the GOT refcount entries that we may have already seen to
3633 the symbol which just became indirect. */
3634 edir->elf.got.refcount += eind->elf.got.refcount;
3635 eind->elf.got.refcount = 0;
3636
3637 /* And plt entries. */
3638 if (eind->elf.plt.plist != NULL)
3639 {
3640 if (edir->elf.plt.plist != NULL)
3641 {
3642 struct plt_entry **entp;
3643 struct plt_entry *ent;
3644
3645 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3646 {
3647 struct plt_entry *dent;
3648
3649 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3650 if (dent->sec == ent->sec && dent->addend == ent->addend)
3651 {
3652 dent->plt.refcount += ent->plt.refcount;
3653 *entp = ent->next;
3654 break;
3655 }
3656 if (dent == NULL)
3657 entp = &ent->next;
3658 }
3659 *entp = edir->elf.plt.plist;
3660 }
3661
3662 edir->elf.plt.plist = eind->elf.plt.plist;
3663 eind->elf.plt.plist = NULL;
3664 }
3665
3666 if (eind->elf.dynindx != -1)
3667 {
3668 if (edir->elf.dynindx != -1)
3669 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3670 edir->elf.dynstr_index);
3671 edir->elf.dynindx = eind->elf.dynindx;
3672 edir->elf.dynstr_index = eind->elf.dynstr_index;
3673 eind->elf.dynindx = -1;
3674 eind->elf.dynstr_index = 0;
3675 }
3676 }
3677
3678 /* Hook called by the linker routine which adds symbols from an object
3679 file. We use it to put .comm items in .sbss, and not .bss. */
3680
3681 static bfd_boolean
3682 ppc_elf_add_symbol_hook (bfd *abfd,
3683 struct bfd_link_info *info,
3684 Elf_Internal_Sym *sym,
3685 const char **namep ATTRIBUTE_UNUSED,
3686 flagword *flagsp ATTRIBUTE_UNUSED,
3687 asection **secp,
3688 bfd_vma *valp)
3689 {
3690 if (sym->st_shndx == SHN_COMMON
3691 && !bfd_link_relocatable (info)
3692 && is_ppc_elf (info->output_bfd)
3693 && sym->st_size <= elf_gp_size (abfd))
3694 {
3695 /* Common symbols less than or equal to -G nn bytes are automatically
3696 put into .sbss. */
3697 struct ppc_elf_link_hash_table *htab;
3698
3699 htab = ppc_elf_hash_table (info);
3700 if (htab->sbss == NULL)
3701 {
3702 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3703
3704 if (!htab->elf.dynobj)
3705 htab->elf.dynobj = abfd;
3706
3707 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3708 ".sbss",
3709 flags);
3710 if (htab->sbss == NULL)
3711 return FALSE;
3712 }
3713
3714 *secp = htab->sbss;
3715 *valp = sym->st_size;
3716 }
3717
3718 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3719 && (abfd->flags & DYNAMIC) == 0
3720 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3721 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3722
3723 return TRUE;
3724 }
3725 \f
3726 /* Find a linker generated pointer with a given addend and type. */
3727
3728 static elf_linker_section_pointers_t *
3729 elf_find_pointer_linker_section
3730 (elf_linker_section_pointers_t *linker_pointers,
3731 bfd_vma addend,
3732 elf_linker_section_t *lsect)
3733 {
3734 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3735 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3736 return linker_pointers;
3737
3738 return NULL;
3739 }
3740
3741 /* Allocate a pointer to live in a linker created section. */
3742
3743 static bfd_boolean
3744 elf_allocate_pointer_linker_section (bfd *abfd,
3745 elf_linker_section_t *lsect,
3746 struct elf_link_hash_entry *h,
3747 const Elf_Internal_Rela *rel)
3748 {
3749 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3750 elf_linker_section_pointers_t *linker_section_ptr;
3751 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3752 bfd_size_type amt;
3753
3754 BFD_ASSERT (lsect != NULL);
3755
3756 /* Is this a global symbol? */
3757 if (h != NULL)
3758 {
3759 struct ppc_elf_link_hash_entry *eh;
3760
3761 /* Has this symbol already been allocated? If so, our work is done. */
3762 eh = (struct ppc_elf_link_hash_entry *) h;
3763 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3764 rel->r_addend,
3765 lsect))
3766 return TRUE;
3767
3768 ptr_linker_section_ptr = &eh->linker_section_pointer;
3769 }
3770 else
3771 {
3772 BFD_ASSERT (is_ppc_elf (abfd));
3773
3774 /* Allocation of a pointer to a local symbol. */
3775 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3776
3777 /* Allocate a table to hold the local symbols if first time. */
3778 if (!ptr)
3779 {
3780 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3781
3782 amt = num_symbols;
3783 amt *= sizeof (elf_linker_section_pointers_t *);
3784 ptr = bfd_zalloc (abfd, amt);
3785
3786 if (!ptr)
3787 return FALSE;
3788
3789 elf_local_ptr_offsets (abfd) = ptr;
3790 }
3791
3792 /* Has this symbol already been allocated? If so, our work is done. */
3793 if (elf_find_pointer_linker_section (ptr[r_symndx],
3794 rel->r_addend,
3795 lsect))
3796 return TRUE;
3797
3798 ptr_linker_section_ptr = &ptr[r_symndx];
3799 }
3800
3801 /* Allocate space for a pointer in the linker section, and allocate
3802 a new pointer record from internal memory. */
3803 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3804 amt = sizeof (elf_linker_section_pointers_t);
3805 linker_section_ptr = bfd_alloc (abfd, amt);
3806
3807 if (!linker_section_ptr)
3808 return FALSE;
3809
3810 linker_section_ptr->next = *ptr_linker_section_ptr;
3811 linker_section_ptr->addend = rel->r_addend;
3812 linker_section_ptr->lsect = lsect;
3813 *ptr_linker_section_ptr = linker_section_ptr;
3814
3815 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3816 return FALSE;
3817 linker_section_ptr->offset = lsect->section->size;
3818 lsect->section->size += 4;
3819
3820 #ifdef DEBUG
3821 fprintf (stderr,
3822 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3823 lsect->name, (long) linker_section_ptr->offset,
3824 (long) lsect->section->size);
3825 #endif
3826
3827 return TRUE;
3828 }
3829
3830 static struct plt_entry **
3831 update_local_sym_info (bfd *abfd,
3832 Elf_Internal_Shdr *symtab_hdr,
3833 unsigned long r_symndx,
3834 int tls_type)
3835 {
3836 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3837 struct plt_entry **local_plt;
3838 char *local_got_tls_masks;
3839
3840 if (local_got_refcounts == NULL)
3841 {
3842 bfd_size_type size = symtab_hdr->sh_info;
3843
3844 size *= (sizeof (*local_got_refcounts)
3845 + sizeof (*local_plt)
3846 + sizeof (*local_got_tls_masks));
3847 local_got_refcounts = bfd_zalloc (abfd, size);
3848 if (local_got_refcounts == NULL)
3849 return NULL;
3850 elf_local_got_refcounts (abfd) = local_got_refcounts;
3851 }
3852
3853 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3854 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3855 local_got_tls_masks[r_symndx] |= tls_type;
3856 if (tls_type != PLT_IFUNC)
3857 local_got_refcounts[r_symndx] += 1;
3858 return local_plt + r_symndx;
3859 }
3860
3861 static bfd_boolean
3862 update_plt_info (bfd *abfd, struct plt_entry **plist,
3863 asection *sec, bfd_vma addend)
3864 {
3865 struct plt_entry *ent;
3866
3867 if (addend < 32768)
3868 sec = NULL;
3869 for (ent = *plist; ent != NULL; ent = ent->next)
3870 if (ent->sec == sec && ent->addend == addend)
3871 break;
3872 if (ent == NULL)
3873 {
3874 bfd_size_type amt = sizeof (*ent);
3875 ent = bfd_alloc (abfd, amt);
3876 if (ent == NULL)
3877 return FALSE;
3878 ent->next = *plist;
3879 ent->sec = sec;
3880 ent->addend = addend;
3881 ent->plt.refcount = 0;
3882 *plist = ent;
3883 }
3884 ent->plt.refcount += 1;
3885 return TRUE;
3886 }
3887
3888 static struct plt_entry *
3889 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3890 {
3891 struct plt_entry *ent;
3892
3893 if (addend < 32768)
3894 sec = NULL;
3895 for (ent = *plist; ent != NULL; ent = ent->next)
3896 if (ent->sec == sec && ent->addend == addend)
3897 break;
3898 return ent;
3899 }
3900
3901 static bfd_boolean
3902 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3903 {
3904 return (r_type == R_PPC_PLTREL24
3905 || r_type == R_PPC_LOCAL24PC
3906 || r_type == R_PPC_REL24
3907 || r_type == R_PPC_REL14
3908 || r_type == R_PPC_REL14_BRTAKEN
3909 || r_type == R_PPC_REL14_BRNTAKEN
3910 || r_type == R_PPC_ADDR24
3911 || r_type == R_PPC_ADDR14
3912 || r_type == R_PPC_ADDR14_BRTAKEN
3913 || r_type == R_PPC_ADDR14_BRNTAKEN
3914 || r_type == R_PPC_VLE_REL24);
3915 }
3916
3917 static void
3918 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3919 {
3920 _bfd_error_handler
3921 /* xgettext:c-format */
3922 (_("%B: relocation %s cannot be used when making a shared object"),
3923 abfd,
3924 ppc_elf_howto_table[r_type]->name);
3925 bfd_set_error (bfd_error_bad_value);
3926 }
3927
3928 /* Look through the relocs for a section during the first phase, and
3929 allocate space in the global offset table or procedure linkage
3930 table. */
3931
3932 static bfd_boolean
3933 ppc_elf_check_relocs (bfd *abfd,
3934 struct bfd_link_info *info,
3935 asection *sec,
3936 const Elf_Internal_Rela *relocs)
3937 {
3938 struct ppc_elf_link_hash_table *htab;
3939 Elf_Internal_Shdr *symtab_hdr;
3940 struct elf_link_hash_entry **sym_hashes;
3941 const Elf_Internal_Rela *rel;
3942 const Elf_Internal_Rela *rel_end;
3943 asection *got2, *sreloc;
3944 struct elf_link_hash_entry *tga;
3945
3946 if (bfd_link_relocatable (info))
3947 return TRUE;
3948
3949 /* Don't do anything special with non-loaded, non-alloced sections.
3950 In particular, any relocs in such sections should not affect GOT
3951 and PLT reference counting (ie. we don't allow them to create GOT
3952 or PLT entries), there's no possibility or desire to optimize TLS
3953 relocs, and there's not much point in propagating relocs to shared
3954 libs that the dynamic linker won't relocate. */
3955 if ((sec->flags & SEC_ALLOC) == 0)
3956 return TRUE;
3957
3958 #ifdef DEBUG
3959 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3960 sec, abfd);
3961 #endif
3962
3963 BFD_ASSERT (is_ppc_elf (abfd));
3964
3965 /* Initialize howto table if not already done. */
3966 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3967 ppc_elf_howto_init ();
3968
3969 htab = ppc_elf_hash_table (info);
3970 if (htab->glink == NULL)
3971 {
3972 if (htab->elf.dynobj == NULL)
3973 htab->elf.dynobj = abfd;
3974 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3975 return FALSE;
3976 }
3977 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3978 FALSE, FALSE, TRUE);
3979 symtab_hdr = &elf_symtab_hdr (abfd);
3980 sym_hashes = elf_sym_hashes (abfd);
3981 got2 = bfd_get_section_by_name (abfd, ".got2");
3982 sreloc = NULL;
3983
3984 rel_end = relocs + sec->reloc_count;
3985 for (rel = relocs; rel < rel_end; rel++)
3986 {
3987 unsigned long r_symndx;
3988 enum elf_ppc_reloc_type r_type;
3989 struct elf_link_hash_entry *h;
3990 int tls_type;
3991 struct plt_entry **ifunc;
3992
3993 r_symndx = ELF32_R_SYM (rel->r_info);
3994 if (r_symndx < symtab_hdr->sh_info)
3995 h = NULL;
3996 else
3997 {
3998 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3999 while (h->root.type == bfd_link_hash_indirect
4000 || h->root.type == bfd_link_hash_warning)
4001 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4002
4003 /* PR15323, ref flags aren't set for references in the same
4004 object. */
4005 h->root.non_ir_ref_regular = 1;
4006 }
4007
4008 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4009 This shows up in particular in an R_PPC_ADDR32 in the eabi
4010 startup code. */
4011 if (h != NULL
4012 && htab->elf.sgot == NULL
4013 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4014 {
4015 if (htab->elf.dynobj == NULL)
4016 htab->elf.dynobj = abfd;
4017 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4018 return FALSE;
4019 BFD_ASSERT (h == htab->elf.hgot);
4020 }
4021
4022 tls_type = 0;
4023 r_type = ELF32_R_TYPE (rel->r_info);
4024 ifunc = NULL;
4025 if (h == NULL && !htab->is_vxworks)
4026 {
4027 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4028 abfd, r_symndx);
4029 if (isym == NULL)
4030 return FALSE;
4031
4032 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4033 {
4034 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4035 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4036 PLT_IFUNC);
4037 if (ifunc == NULL)
4038 return FALSE;
4039
4040 /* STT_GNU_IFUNC symbols must have a PLT entry;
4041 In a non-pie executable even when there are
4042 no plt calls. */
4043 if (!bfd_link_pic (info)
4044 || is_branch_reloc (r_type))
4045 {
4046 bfd_vma addend = 0;
4047 if (r_type == R_PPC_PLTREL24)
4048 {
4049 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4050 if (bfd_link_pic (info))
4051 addend = rel->r_addend;
4052 }
4053 if (!update_plt_info (abfd, ifunc, got2, addend))
4054 return FALSE;
4055 }
4056 }
4057 }
4058
4059 if (!htab->is_vxworks
4060 && is_branch_reloc (r_type)
4061 && h != NULL
4062 && h == tga)
4063 {
4064 if (rel != relocs
4065 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4066 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4067 /* We have a new-style __tls_get_addr call with a marker
4068 reloc. */
4069 ;
4070 else
4071 /* Mark this section as having an old-style call. */
4072 sec->has_tls_get_addr_call = 1;
4073 }
4074
4075 switch (r_type)
4076 {
4077 case R_PPC_TLSGD:
4078 case R_PPC_TLSLD:
4079 /* These special tls relocs tie a call to __tls_get_addr with
4080 its parameter symbol. */
4081 break;
4082
4083 case R_PPC_GOT_TLSLD16:
4084 case R_PPC_GOT_TLSLD16_LO:
4085 case R_PPC_GOT_TLSLD16_HI:
4086 case R_PPC_GOT_TLSLD16_HA:
4087 tls_type = TLS_TLS | TLS_LD;
4088 goto dogottls;
4089
4090 case R_PPC_GOT_TLSGD16:
4091 case R_PPC_GOT_TLSGD16_LO:
4092 case R_PPC_GOT_TLSGD16_HI:
4093 case R_PPC_GOT_TLSGD16_HA:
4094 tls_type = TLS_TLS | TLS_GD;
4095 goto dogottls;
4096
4097 case R_PPC_GOT_TPREL16:
4098 case R_PPC_GOT_TPREL16_LO:
4099 case R_PPC_GOT_TPREL16_HI:
4100 case R_PPC_GOT_TPREL16_HA:
4101 if (bfd_link_dll (info))
4102 info->flags |= DF_STATIC_TLS;
4103 tls_type = TLS_TLS | TLS_TPREL;
4104 goto dogottls;
4105
4106 case R_PPC_GOT_DTPREL16:
4107 case R_PPC_GOT_DTPREL16_LO:
4108 case R_PPC_GOT_DTPREL16_HI:
4109 case R_PPC_GOT_DTPREL16_HA:
4110 tls_type = TLS_TLS | TLS_DTPREL;
4111 dogottls:
4112 sec->has_tls_reloc = 1;
4113 /* Fall through. */
4114
4115 /* GOT16 relocations */
4116 case R_PPC_GOT16:
4117 case R_PPC_GOT16_LO:
4118 case R_PPC_GOT16_HI:
4119 case R_PPC_GOT16_HA:
4120 /* This symbol requires a global offset table entry. */
4121 if (htab->elf.sgot == NULL)
4122 {
4123 if (htab->elf.dynobj == NULL)
4124 htab->elf.dynobj = abfd;
4125 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4126 return FALSE;
4127 }
4128 if (h != NULL)
4129 {
4130 h->got.refcount += 1;
4131 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4132 }
4133 else
4134 /* This is a global offset table entry for a local symbol. */
4135 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4136 return FALSE;
4137
4138 /* We may also need a plt entry if the symbol turns out to be
4139 an ifunc. */
4140 if (h != NULL && !bfd_link_pic (info))
4141 {
4142 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4143 return FALSE;
4144 }
4145 break;
4146
4147 /* Indirect .sdata relocation. */
4148 case R_PPC_EMB_SDAI16:
4149 if (bfd_link_pic (info))
4150 {
4151 bad_shared_reloc (abfd, r_type);
4152 return FALSE;
4153 }
4154 htab->sdata[0].sym->ref_regular = 1;
4155 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4156 h, rel))
4157 return FALSE;
4158 if (h != NULL)
4159 {
4160 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4161 h->non_got_ref = TRUE;
4162 }
4163 break;
4164
4165 /* Indirect .sdata2 relocation. */
4166 case R_PPC_EMB_SDA2I16:
4167 if (bfd_link_pic (info))
4168 {
4169 bad_shared_reloc (abfd, r_type);
4170 return FALSE;
4171 }
4172 htab->sdata[1].sym->ref_regular = 1;
4173 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4174 h, rel))
4175 return FALSE;
4176 if (h != NULL)
4177 {
4178 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4179 h->non_got_ref = TRUE;
4180 }
4181 break;
4182
4183 case R_PPC_SDAREL16:
4184 htab->sdata[0].sym->ref_regular = 1;
4185 /* Fall through. */
4186
4187 case R_PPC_VLE_SDAREL_LO16A:
4188 case R_PPC_VLE_SDAREL_LO16D:
4189 case R_PPC_VLE_SDAREL_HI16A:
4190 case R_PPC_VLE_SDAREL_HI16D:
4191 case R_PPC_VLE_SDAREL_HA16A:
4192 case R_PPC_VLE_SDAREL_HA16D:
4193 if (h != NULL)
4194 {
4195 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4196 h->non_got_ref = TRUE;
4197 }
4198 break;
4199
4200 case R_PPC_VLE_REL8:
4201 case R_PPC_VLE_REL15:
4202 case R_PPC_VLE_REL24:
4203 case R_PPC_VLE_LO16A:
4204 case R_PPC_VLE_LO16D:
4205 case R_PPC_VLE_HI16A:
4206 case R_PPC_VLE_HI16D:
4207 case R_PPC_VLE_HA16A:
4208 case R_PPC_VLE_HA16D:
4209 case R_PPC_VLE_ADDR20:
4210 break;
4211
4212 case R_PPC_EMB_SDA2REL:
4213 if (bfd_link_pic (info))
4214 {
4215 bad_shared_reloc (abfd, r_type);
4216 return FALSE;
4217 }
4218 htab->sdata[1].sym->ref_regular = 1;
4219 if (h != NULL)
4220 {
4221 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4222 h->non_got_ref = TRUE;
4223 }
4224 break;
4225
4226 case R_PPC_VLE_SDA21_LO:
4227 case R_PPC_VLE_SDA21:
4228 case R_PPC_EMB_SDA21:
4229 case R_PPC_EMB_RELSDA:
4230 if (bfd_link_pic (info))
4231 {
4232 bad_shared_reloc (abfd, r_type);
4233 return FALSE;
4234 }
4235 if (h != NULL)
4236 {
4237 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4238 h->non_got_ref = TRUE;
4239 }
4240 break;
4241
4242 case R_PPC_EMB_NADDR32:
4243 case R_PPC_EMB_NADDR16:
4244 case R_PPC_EMB_NADDR16_LO:
4245 case R_PPC_EMB_NADDR16_HI:
4246 case R_PPC_EMB_NADDR16_HA:
4247 if (bfd_link_pic (info))
4248 {
4249 bad_shared_reloc (abfd, r_type);
4250 return FALSE;
4251 }
4252 if (h != NULL)
4253 h->non_got_ref = TRUE;
4254 break;
4255
4256 case R_PPC_PLTREL24:
4257 if (h == NULL)
4258 break;
4259 /* Fall through */
4260 case R_PPC_PLT32:
4261 case R_PPC_PLTREL32:
4262 case R_PPC_PLT16_LO:
4263 case R_PPC_PLT16_HI:
4264 case R_PPC_PLT16_HA:
4265 #ifdef DEBUG
4266 fprintf (stderr, "Reloc requires a PLT entry\n");
4267 #endif
4268 /* This symbol requires a procedure linkage table entry. */
4269 if (h == NULL)
4270 {
4271 if (ifunc == NULL)
4272 {
4273 /* It does not make sense to have a procedure linkage
4274 table entry for a non-ifunc local symbol. */
4275 info->callbacks->einfo
4276 /* xgettext:c-format */
4277 (_("%H: %s reloc against local symbol\n"),
4278 abfd, sec, rel->r_offset,
4279 ppc_elf_howto_table[r_type]->name);
4280 bfd_set_error (bfd_error_bad_value);
4281 return FALSE;
4282 }
4283 }
4284 else
4285 {
4286 bfd_vma addend = 0;
4287
4288 if (r_type == R_PPC_PLTREL24)
4289 {
4290 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4291 if (bfd_link_pic (info))
4292 addend = rel->r_addend;
4293 }
4294 h->needs_plt = 1;
4295 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4296 return FALSE;
4297 }
4298 break;
4299
4300 /* The following relocations don't need to propagate the
4301 relocation if linking a shared object since they are
4302 section relative. */
4303 case R_PPC_SECTOFF:
4304 case R_PPC_SECTOFF_LO:
4305 case R_PPC_SECTOFF_HI:
4306 case R_PPC_SECTOFF_HA:
4307 case R_PPC_DTPREL16:
4308 case R_PPC_DTPREL16_LO:
4309 case R_PPC_DTPREL16_HI:
4310 case R_PPC_DTPREL16_HA:
4311 case R_PPC_TOC16:
4312 break;
4313
4314 case R_PPC_REL16:
4315 case R_PPC_REL16_LO:
4316 case R_PPC_REL16_HI:
4317 case R_PPC_REL16_HA:
4318 case R_PPC_REL16DX_HA:
4319 ppc_elf_tdata (abfd)->has_rel16 = 1;
4320 break;
4321
4322 /* These are just markers. */
4323 case R_PPC_TLS:
4324 case R_PPC_EMB_MRKREF:
4325 case R_PPC_NONE:
4326 case R_PPC_max:
4327 case R_PPC_RELAX:
4328 case R_PPC_RELAX_PLT:
4329 case R_PPC_RELAX_PLTREL24:
4330 case R_PPC_16DX_HA:
4331 break;
4332
4333 /* These should only appear in dynamic objects. */
4334 case R_PPC_COPY:
4335 case R_PPC_GLOB_DAT:
4336 case R_PPC_JMP_SLOT:
4337 case R_PPC_RELATIVE:
4338 case R_PPC_IRELATIVE:
4339 break;
4340
4341 /* These aren't handled yet. We'll report an error later. */
4342 case R_PPC_ADDR30:
4343 case R_PPC_EMB_RELSEC16:
4344 case R_PPC_EMB_RELST_LO:
4345 case R_PPC_EMB_RELST_HI:
4346 case R_PPC_EMB_RELST_HA:
4347 case R_PPC_EMB_BIT_FLD:
4348 break;
4349
4350 /* This refers only to functions defined in the shared library. */
4351 case R_PPC_LOCAL24PC:
4352 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4353 {
4354 htab->plt_type = PLT_OLD;
4355 htab->old_bfd = abfd;
4356 }
4357 if (h != NULL && h->type == STT_GNU_IFUNC)
4358 {
4359 h->needs_plt = 1;
4360 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4361 return FALSE;
4362 }
4363 break;
4364
4365 /* This relocation describes the C++ object vtable hierarchy.
4366 Reconstruct it for later use during GC. */
4367 case R_PPC_GNU_VTINHERIT:
4368 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4369 return FALSE;
4370 break;
4371
4372 /* This relocation describes which C++ vtable entries are actually
4373 used. Record for later use during GC. */
4374 case R_PPC_GNU_VTENTRY:
4375 BFD_ASSERT (h != NULL);
4376 if (h != NULL
4377 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4378 return FALSE;
4379 break;
4380
4381 /* We shouldn't really be seeing TPREL32. */
4382 case R_PPC_TPREL32:
4383 case R_PPC_TPREL16:
4384 case R_PPC_TPREL16_LO:
4385 case R_PPC_TPREL16_HI:
4386 case R_PPC_TPREL16_HA:
4387 if (bfd_link_dll (info))
4388 info->flags |= DF_STATIC_TLS;
4389 goto dodyn;
4390
4391 /* Nor these. */
4392 case R_PPC_DTPMOD32:
4393 case R_PPC_DTPREL32:
4394 goto dodyn;
4395
4396 case R_PPC_REL32:
4397 if (h == NULL
4398 && got2 != NULL
4399 && (sec->flags & SEC_CODE) != 0
4400 && bfd_link_pic (info)
4401 && htab->plt_type == PLT_UNSET)
4402 {
4403 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4404 the start of a function, which assembles to a REL32
4405 reference to .got2. If we detect one of these, then
4406 force the old PLT layout because the linker cannot
4407 reliably deduce the GOT pointer value needed for
4408 PLT call stubs. */
4409 asection *s;
4410 Elf_Internal_Sym *isym;
4411
4412 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4413 abfd, r_symndx);
4414 if (isym == NULL)
4415 return FALSE;
4416
4417 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4418 if (s == got2)
4419 {
4420 htab->plt_type = PLT_OLD;
4421 htab->old_bfd = abfd;
4422 }
4423 }
4424 if (h == NULL || h == htab->elf.hgot)
4425 break;
4426 /* fall through */
4427
4428 case R_PPC_ADDR32:
4429 case R_PPC_ADDR16:
4430 case R_PPC_ADDR16_LO:
4431 case R_PPC_ADDR16_HI:
4432 case R_PPC_ADDR16_HA:
4433 case R_PPC_UADDR32:
4434 case R_PPC_UADDR16:
4435 if (h != NULL && !bfd_link_pic (info))
4436 {
4437 /* We may need a plt entry if the symbol turns out to be
4438 a function defined in a dynamic object. */
4439 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4440 return FALSE;
4441
4442 /* We may need a copy reloc too. */
4443 h->non_got_ref = 1;
4444 h->pointer_equality_needed = 1;
4445 if (r_type == R_PPC_ADDR16_HA)
4446 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4447 if (r_type == R_PPC_ADDR16_LO)
4448 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4449 }
4450 goto dodyn;
4451
4452 case R_PPC_REL24:
4453 case R_PPC_REL14:
4454 case R_PPC_REL14_BRTAKEN:
4455 case R_PPC_REL14_BRNTAKEN:
4456 if (h == NULL)
4457 break;
4458 if (h == htab->elf.hgot)
4459 {
4460 if (htab->plt_type == PLT_UNSET)
4461 {
4462 htab->plt_type = PLT_OLD;
4463 htab->old_bfd = abfd;
4464 }
4465 break;
4466 }
4467 /* fall through */
4468
4469 case R_PPC_ADDR24:
4470 case R_PPC_ADDR14:
4471 case R_PPC_ADDR14_BRTAKEN:
4472 case R_PPC_ADDR14_BRNTAKEN:
4473 if (h != NULL && !bfd_link_pic (info))
4474 {
4475 /* We may need a plt entry if the symbol turns out to be
4476 a function defined in a dynamic object. */
4477 h->needs_plt = 1;
4478 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4479 return FALSE;
4480 break;
4481 }
4482
4483 dodyn:
4484 /* If we are creating a shared library, and this is a reloc
4485 against a global symbol, or a non PC relative reloc
4486 against a local symbol, then we need to copy the reloc
4487 into the shared library. However, if we are linking with
4488 -Bsymbolic, we do not need to copy a reloc against a
4489 global symbol which is defined in an object we are
4490 including in the link (i.e., DEF_REGULAR is set). At
4491 this point we have not seen all the input files, so it is
4492 possible that DEF_REGULAR is not set now but will be set
4493 later (it is never cleared). In case of a weak definition,
4494 DEF_REGULAR may be cleared later by a strong definition in
4495 a shared library. We account for that possibility below by
4496 storing information in the dyn_relocs field of the hash
4497 table entry. A similar situation occurs when creating
4498 shared libraries and symbol visibility changes render the
4499 symbol local.
4500
4501 If on the other hand, we are creating an executable, we
4502 may need to keep relocations for symbols satisfied by a
4503 dynamic library if we manage to avoid copy relocs for the
4504 symbol. */
4505 if ((bfd_link_pic (info)
4506 && (must_be_dyn_reloc (info, r_type)
4507 || (h != NULL
4508 && (!SYMBOLIC_BIND (info, h)
4509 || h->root.type == bfd_link_hash_defweak
4510 || !h->def_regular))))
4511 || (ELIMINATE_COPY_RELOCS
4512 && !bfd_link_pic (info)
4513 && h != NULL
4514 && (h->root.type == bfd_link_hash_defweak
4515 || !h->def_regular)))
4516 {
4517 #ifdef DEBUG
4518 fprintf (stderr,
4519 "ppc_elf_check_relocs needs to "
4520 "create relocation for %s\n",
4521 (h && h->root.root.string
4522 ? h->root.root.string : "<unknown>"));
4523 #endif
4524 if (sreloc == NULL)
4525 {
4526 if (htab->elf.dynobj == NULL)
4527 htab->elf.dynobj = abfd;
4528
4529 sreloc = _bfd_elf_make_dynamic_reloc_section
4530 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4531
4532 if (sreloc == NULL)
4533 return FALSE;
4534 }
4535
4536 /* If this is a global symbol, we count the number of
4537 relocations we need for this symbol. */
4538 if (h != NULL)
4539 {
4540 struct elf_dyn_relocs *p;
4541 struct elf_dyn_relocs **rel_head;
4542
4543 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4544 p = *rel_head;
4545 if (p == NULL || p->sec != sec)
4546 {
4547 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4548 if (p == NULL)
4549 return FALSE;
4550 p->next = *rel_head;
4551 *rel_head = p;
4552 p->sec = sec;
4553 p->count = 0;
4554 p->pc_count = 0;
4555 }
4556 p->count += 1;
4557 if (!must_be_dyn_reloc (info, r_type))
4558 p->pc_count += 1;
4559 }
4560 else
4561 {
4562 /* Track dynamic relocs needed for local syms too.
4563 We really need local syms available to do this
4564 easily. Oh well. */
4565 struct ppc_dyn_relocs *p;
4566 struct ppc_dyn_relocs **rel_head;
4567 bfd_boolean is_ifunc;
4568 asection *s;
4569 void *vpp;
4570 Elf_Internal_Sym *isym;
4571
4572 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4573 abfd, r_symndx);
4574 if (isym == NULL)
4575 return FALSE;
4576
4577 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4578 if (s == NULL)
4579 s = sec;
4580
4581 vpp = &elf_section_data (s)->local_dynrel;
4582 rel_head = (struct ppc_dyn_relocs **) vpp;
4583 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4584 p = *rel_head;
4585 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4586 p = p->next;
4587 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4588 {
4589 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4590 if (p == NULL)
4591 return FALSE;
4592 p->next = *rel_head;
4593 *rel_head = p;
4594 p->sec = sec;
4595 p->ifunc = is_ifunc;
4596 p->count = 0;
4597 }
4598 p->count += 1;
4599 }
4600 }
4601
4602 break;
4603 }
4604 }
4605
4606 return TRUE;
4607 }
4608 \f
4609 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4610 and OBFD, and merge non-conflicting ones. */
4611 void
4612 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4613 {
4614 bfd *obfd = info->output_bfd;
4615 obj_attribute *in_attr, *in_attrs;
4616 obj_attribute *out_attr, *out_attrs;
4617
4618 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4619 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4620
4621 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4622 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4623
4624 if (in_attr->i != out_attr->i)
4625 {
4626 int in_fp = in_attr->i & 3;
4627 int out_fp = out_attr->i & 3;
4628
4629 if (in_fp == 0)
4630 ;
4631 else if (out_fp == 0)
4632 {
4633 out_attr->type = 1;
4634 out_attr->i ^= in_fp;
4635 }
4636 else if (out_fp != 2 && in_fp == 2)
4637 _bfd_error_handler
4638 /* xgettext:c-format */
4639 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4640 else if (out_fp == 2 && in_fp != 2)
4641 _bfd_error_handler
4642 /* xgettext:c-format */
4643 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4644 else if (out_fp == 1 && in_fp == 3)
4645 _bfd_error_handler
4646 /* xgettext:c-format */
4647 (_("Warning: %B uses double-precision hard float, "
4648 "%B uses single-precision hard float"), obfd, ibfd);
4649 else if (out_fp == 3 && in_fp == 1)
4650 _bfd_error_handler
4651 /* xgettext:c-format */
4652 (_("Warning: %B uses double-precision hard float, "
4653 "%B uses single-precision hard float"), ibfd, obfd);
4654
4655 in_fp = in_attr->i & 0xc;
4656 out_fp = out_attr->i & 0xc;
4657 if (in_fp == 0)
4658 ;
4659 else if (out_fp == 0)
4660 {
4661 out_attr->type = 1;
4662 out_attr->i ^= in_fp;
4663 }
4664 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4665 _bfd_error_handler
4666 /* xgettext:c-format */
4667 (_("Warning: %B uses 64-bit long double, "
4668 "%B uses 128-bit long double"), ibfd, obfd);
4669 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4670 _bfd_error_handler
4671 /* xgettext:c-format */
4672 (_("Warning: %B uses 64-bit long double, "
4673 "%B uses 128-bit long double"), obfd, ibfd);
4674 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4675 _bfd_error_handler
4676 /* xgettext:c-format */
4677 (_("Warning: %B uses IBM long double, "
4678 "%B uses IEEE long double"), ibfd, obfd);
4679 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4680 _bfd_error_handler
4681 /* xgettext:c-format */
4682 (_("Warning: %B uses IBM long double, "
4683 "%B uses IEEE long double"), obfd, ibfd);
4684 }
4685 }
4686
4687 /* Merge object attributes from IBFD into OBFD. Warn if
4688 there are conflicting attributes. */
4689 static bfd_boolean
4690 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4691 {
4692 bfd *obfd;
4693 obj_attribute *in_attr, *in_attrs;
4694 obj_attribute *out_attr, *out_attrs;
4695
4696 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4697
4698 obfd = info->output_bfd;
4699 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4700 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4701
4702 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4703 merge non-conflicting ones. */
4704 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4705 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4706 if (in_attr->i != out_attr->i)
4707 {
4708 int in_vec = in_attr->i & 3;
4709 int out_vec = out_attr->i & 3;
4710
4711 if (in_vec == 0)
4712 ;
4713 else if (out_vec == 0)
4714 {
4715 out_attr->type = 1;
4716 out_attr->i = in_vec;
4717 }
4718 /* For now, allow generic to transition to AltiVec or SPE
4719 without a warning. If GCC marked files with their stack
4720 alignment and used don't-care markings for files which are
4721 not affected by the vector ABI, we could warn about this
4722 case too. */
4723 else if (in_vec == 1)
4724 ;
4725 else if (out_vec == 1)
4726 {
4727 out_attr->type = 1;
4728 out_attr->i = in_vec;
4729 }
4730 else if (out_vec < in_vec)
4731 _bfd_error_handler
4732 /* xgettext:c-format */
4733 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4734 obfd, ibfd);
4735 else if (out_vec > in_vec)
4736 _bfd_error_handler
4737 /* xgettext:c-format */
4738 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4739 ibfd, obfd);
4740 }
4741
4742 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4743 and merge non-conflicting ones. */
4744 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4745 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4746 if (in_attr->i != out_attr->i)
4747 {
4748 int in_struct = in_attr->i & 3;
4749 int out_struct = out_attr->i & 3;
4750
4751 if (in_struct == 0 || in_struct == 3)
4752 ;
4753 else if (out_struct == 0)
4754 {
4755 out_attr->type = 1;
4756 out_attr->i = in_struct;
4757 }
4758 else if (out_struct < in_struct)
4759 _bfd_error_handler
4760 /* xgettext:c-format */
4761 (_("Warning: %B uses r3/r4 for small structure returns, "
4762 "%B uses memory"), obfd, ibfd);
4763 else if (out_struct > in_struct)
4764 _bfd_error_handler
4765 /* xgettext:c-format */
4766 (_("Warning: %B uses r3/r4 for small structure returns, "
4767 "%B uses memory"), ibfd, obfd);
4768 }
4769
4770 /* Merge Tag_compatibility attributes and any common GNU ones. */
4771 _bfd_elf_merge_object_attributes (ibfd, info);
4772
4773 return TRUE;
4774 }
4775
4776 /* Merge backend specific data from an object file to the output
4777 object file when linking. */
4778
4779 static bfd_boolean
4780 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4781 {
4782 bfd *obfd = info->output_bfd;
4783 flagword old_flags;
4784 flagword new_flags;
4785 bfd_boolean error;
4786
4787 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4788 return TRUE;
4789
4790 /* Check if we have the same endianness. */
4791 if (! _bfd_generic_verify_endian_match (ibfd, info))
4792 return FALSE;
4793
4794 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4795 return FALSE;
4796
4797 new_flags = elf_elfheader (ibfd)->e_flags;
4798 old_flags = elf_elfheader (obfd)->e_flags;
4799 if (!elf_flags_init (obfd))
4800 {
4801 /* First call, no flags set. */
4802 elf_flags_init (obfd) = TRUE;
4803 elf_elfheader (obfd)->e_flags = new_flags;
4804 }
4805
4806 /* Compatible flags are ok. */
4807 else if (new_flags == old_flags)
4808 ;
4809
4810 /* Incompatible flags. */
4811 else
4812 {
4813 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4814 to be linked with either. */
4815 error = FALSE;
4816 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4817 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4818 {
4819 error = TRUE;
4820 _bfd_error_handler
4821 (_("%B: compiled with -mrelocatable and linked with "
4822 "modules compiled normally"), ibfd);
4823 }
4824 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4825 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4826 {
4827 error = TRUE;
4828 _bfd_error_handler
4829 (_("%B: compiled normally and linked with "
4830 "modules compiled with -mrelocatable"), ibfd);
4831 }
4832
4833 /* The output is -mrelocatable-lib iff both the input files are. */
4834 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4835 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4836
4837 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4838 but each input file is either -mrelocatable or -mrelocatable-lib. */
4839 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4840 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4841 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4842 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4843
4844 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4845 any module uses it. */
4846 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4847
4848 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4849 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4850
4851 /* Warn about any other mismatches. */
4852 if (new_flags != old_flags)
4853 {
4854 error = TRUE;
4855 _bfd_error_handler
4856 /* xgettext:c-format */
4857 (_("%B: uses different e_flags (%#x) fields "
4858 "than previous modules (%#x)"),
4859 ibfd, new_flags, old_flags);
4860 }
4861
4862 if (error)
4863 {
4864 bfd_set_error (bfd_error_bad_value);
4865 return FALSE;
4866 }
4867 }
4868
4869 return TRUE;
4870 }
4871
4872 static void
4873 ppc_elf_vle_split16 (bfd *input_bfd,
4874 asection *input_section,
4875 unsigned long offset,
4876 bfd_byte *loc,
4877 bfd_vma value,
4878 split16_format_type split16_format,
4879 bfd_boolean fixup)
4880 {
4881 unsigned int insn, opcode, top5;
4882
4883 insn = bfd_get_32 (input_bfd, loc);
4884 opcode = insn & 0xfc00f800;
4885 if (opcode == E_OR2I_INSN
4886 || opcode == E_AND2I_DOT_INSN
4887 || opcode == E_OR2IS_INSN
4888 || opcode == E_LIS_INSN
4889 || opcode == E_AND2IS_DOT_INSN)
4890 {
4891 if (split16_format != split16a_type)
4892 {
4893 if (fixup)
4894 split16_format = split16a_type;
4895 else
4896 _bfd_error_handler
4897 /* xgettext:c-format */
4898 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4899 input_bfd, input_section, offset, opcode);
4900 }
4901 }
4902 else if (opcode == E_ADD2I_DOT_INSN
4903 || opcode == E_ADD2IS_INSN
4904 || opcode == E_CMP16I_INSN
4905 || opcode == E_MULL2I_INSN
4906 || opcode == E_CMPL16I_INSN
4907 || opcode == E_CMPH16I_INSN
4908 || opcode == E_CMPHL16I_INSN)
4909 {
4910 if (split16_format != split16d_type)
4911 {
4912 if (fixup)
4913 split16_format = split16d_type;
4914 else
4915 _bfd_error_handler
4916 /* xgettext:c-format */
4917 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4918 input_bfd, input_section, offset, opcode);
4919 }
4920 }
4921 top5 = value & 0xf800;
4922 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
4923 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
4924 insn |= top5;
4925 insn |= value & 0x7ff;
4926 bfd_put_32 (input_bfd, insn, loc);
4927 }
4928
4929 static void
4930 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
4931 {
4932 unsigned int insn;
4933
4934 insn = bfd_get_32 (output_bfd, loc);
4935 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
4936 /* Top 4 bits of value to 17..20. */
4937 insn |= (value & 0xf0000) >> 5;
4938 /* Next 5 bits of the value to 11..15. */
4939 insn |= (value & 0xf800) << 5;
4940 /* And the final 11 bits of the value to bits 21 to 31. */
4941 insn |= value & 0x7ff;
4942 bfd_put_32 (output_bfd, insn, loc);
4943 }
4944
4945 \f
4946 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4947 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4948 int
4949 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4950 struct bfd_link_info *info)
4951 {
4952 struct ppc_elf_link_hash_table *htab;
4953 flagword flags;
4954
4955 htab = ppc_elf_hash_table (info);
4956
4957 if (htab->plt_type == PLT_UNSET)
4958 {
4959 struct elf_link_hash_entry *h;
4960
4961 if (htab->params->plt_style == PLT_OLD)
4962 htab->plt_type = PLT_OLD;
4963 else if (bfd_link_pic (info)
4964 && htab->elf.dynamic_sections_created
4965 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4966 FALSE, FALSE, TRUE)) != NULL
4967 && (h->type == STT_FUNC
4968 || h->needs_plt)
4969 && h->ref_regular
4970 && !(SYMBOL_CALLS_LOCAL (info, h)
4971 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
4972 {
4973 /* Profiling of shared libs (and pies) is not supported with
4974 secure plt, because ppc32 does profiling before a
4975 function prologue and a secure plt pic call stubs needs
4976 r30 to be set up. */
4977 htab->plt_type = PLT_OLD;
4978 }
4979 else
4980 {
4981 bfd *ibfd;
4982 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4983
4984 /* Look through the reloc flags left by ppc_elf_check_relocs.
4985 Use the old style bss plt if a file makes plt calls
4986 without using the new relocs, and if ld isn't given
4987 --secure-plt and we never see REL16 relocs. */
4988 if (plt_type == PLT_UNSET)
4989 plt_type = PLT_OLD;
4990 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4991 if (is_ppc_elf (ibfd))
4992 {
4993 if (ppc_elf_tdata (ibfd)->has_rel16)
4994 plt_type = PLT_NEW;
4995 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4996 {
4997 plt_type = PLT_OLD;
4998 htab->old_bfd = ibfd;
4999 break;
5000 }
5001 }
5002 htab->plt_type = plt_type;
5003 }
5004 }
5005 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5006 {
5007 if (htab->old_bfd != NULL)
5008 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5009 htab->old_bfd);
5010 else
5011 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5012 }
5013
5014 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5015
5016 if (htab->plt_type == PLT_NEW)
5017 {
5018 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5019 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5020
5021 /* The new PLT is a loaded section. */
5022 if (htab->elf.splt != NULL
5023 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5024 return -1;
5025
5026 /* The new GOT is not executable. */
5027 if (htab->elf.sgot != NULL
5028 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5029 return -1;
5030 }
5031 else
5032 {
5033 /* Stop an unused .glink section from affecting .text alignment. */
5034 if (htab->glink != NULL
5035 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5036 return -1;
5037 }
5038 return htab->plt_type == PLT_NEW;
5039 }
5040 \f
5041 /* Return the section that should be marked against GC for a given
5042 relocation. */
5043
5044 static asection *
5045 ppc_elf_gc_mark_hook (asection *sec,
5046 struct bfd_link_info *info,
5047 Elf_Internal_Rela *rel,
5048 struct elf_link_hash_entry *h,
5049 Elf_Internal_Sym *sym)
5050 {
5051 if (h != NULL)
5052 switch (ELF32_R_TYPE (rel->r_info))
5053 {
5054 case R_PPC_GNU_VTINHERIT:
5055 case R_PPC_GNU_VTENTRY:
5056 return NULL;
5057 }
5058
5059 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5060 }
5061 \f
5062 /* Set plt output section type, htab->tls_get_addr, and call the
5063 generic ELF tls_setup function. */
5064
5065 asection *
5066 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5067 {
5068 struct ppc_elf_link_hash_table *htab;
5069
5070 htab = ppc_elf_hash_table (info);
5071 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5072 FALSE, FALSE, TRUE);
5073 if (htab->plt_type != PLT_NEW)
5074 htab->params->no_tls_get_addr_opt = TRUE;
5075
5076 if (!htab->params->no_tls_get_addr_opt)
5077 {
5078 struct elf_link_hash_entry *opt, *tga;
5079 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5080 FALSE, FALSE, TRUE);
5081 if (opt != NULL
5082 && (opt->root.type == bfd_link_hash_defined
5083 || opt->root.type == bfd_link_hash_defweak))
5084 {
5085 /* If glibc supports an optimized __tls_get_addr call stub,
5086 signalled by the presence of __tls_get_addr_opt, and we'll
5087 be calling __tls_get_addr via a plt call stub, then
5088 make __tls_get_addr point to __tls_get_addr_opt. */
5089 tga = htab->tls_get_addr;
5090 if (htab->elf.dynamic_sections_created
5091 && tga != NULL
5092 && (tga->type == STT_FUNC
5093 || tga->needs_plt)
5094 && !(SYMBOL_CALLS_LOCAL (info, tga)
5095 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5096 {
5097 struct plt_entry *ent;
5098 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5099 if (ent->plt.refcount > 0)
5100 break;
5101 if (ent != NULL)
5102 {
5103 tga->root.type = bfd_link_hash_indirect;
5104 tga->root.u.i.link = &opt->root;
5105 ppc_elf_copy_indirect_symbol (info, opt, tga);
5106 opt->mark = 1;
5107 if (opt->dynindx != -1)
5108 {
5109 /* Use __tls_get_addr_opt in dynamic relocations. */
5110 opt->dynindx = -1;
5111 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5112 opt->dynstr_index);
5113 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5114 return FALSE;
5115 }
5116 htab->tls_get_addr = opt;
5117 }
5118 }
5119 }
5120 else
5121 htab->params->no_tls_get_addr_opt = TRUE;
5122 }
5123 if (htab->plt_type == PLT_NEW
5124 && htab->elf.splt != NULL
5125 && htab->elf.splt->output_section != NULL)
5126 {
5127 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5128 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5129 }
5130
5131 return _bfd_elf_tls_setup (obfd, info);
5132 }
5133
5134 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5135 HASH. */
5136
5137 static bfd_boolean
5138 branch_reloc_hash_match (const bfd *ibfd,
5139 const Elf_Internal_Rela *rel,
5140 const struct elf_link_hash_entry *hash)
5141 {
5142 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5143 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5144 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5145
5146 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5147 {
5148 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5149 struct elf_link_hash_entry *h;
5150
5151 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5152 while (h->root.type == bfd_link_hash_indirect
5153 || h->root.type == bfd_link_hash_warning)
5154 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5155 if (h == hash)
5156 return TRUE;
5157 }
5158 return FALSE;
5159 }
5160
5161 /* Run through all the TLS relocs looking for optimization
5162 opportunities. */
5163
5164 bfd_boolean
5165 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5166 struct bfd_link_info *info)
5167 {
5168 bfd *ibfd;
5169 asection *sec;
5170 struct ppc_elf_link_hash_table *htab;
5171 int pass;
5172
5173 if (!bfd_link_executable (info))
5174 return TRUE;
5175
5176 htab = ppc_elf_hash_table (info);
5177 if (htab == NULL)
5178 return FALSE;
5179
5180 /* Make two passes through the relocs. First time check that tls
5181 relocs involved in setting up a tls_get_addr call are indeed
5182 followed by such a call. If they are not, don't do any tls
5183 optimization. On the second pass twiddle tls_mask flags to
5184 notify relocate_section that optimization can be done, and
5185 adjust got and plt refcounts. */
5186 for (pass = 0; pass < 2; ++pass)
5187 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5188 {
5189 Elf_Internal_Sym *locsyms = NULL;
5190 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5191 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5192
5193 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5194 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5195 {
5196 Elf_Internal_Rela *relstart, *rel, *relend;
5197 int expecting_tls_get_addr = 0;
5198
5199 /* Read the relocations. */
5200 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5201 info->keep_memory);
5202 if (relstart == NULL)
5203 return FALSE;
5204
5205 relend = relstart + sec->reloc_count;
5206 for (rel = relstart; rel < relend; rel++)
5207 {
5208 enum elf_ppc_reloc_type r_type;
5209 unsigned long r_symndx;
5210 struct elf_link_hash_entry *h = NULL;
5211 char *tls_mask;
5212 char tls_set, tls_clear;
5213 bfd_boolean is_local;
5214 bfd_signed_vma *got_count;
5215
5216 r_symndx = ELF32_R_SYM (rel->r_info);
5217 if (r_symndx >= symtab_hdr->sh_info)
5218 {
5219 struct elf_link_hash_entry **sym_hashes;
5220
5221 sym_hashes = elf_sym_hashes (ibfd);
5222 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5223 while (h->root.type == bfd_link_hash_indirect
5224 || h->root.type == bfd_link_hash_warning)
5225 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5226 }
5227
5228 is_local = FALSE;
5229 if (h == NULL
5230 || !h->def_dynamic)
5231 is_local = TRUE;
5232
5233 r_type = ELF32_R_TYPE (rel->r_info);
5234 /* If this section has old-style __tls_get_addr calls
5235 without marker relocs, then check that each
5236 __tls_get_addr call reloc is preceded by a reloc
5237 that conceivably belongs to the __tls_get_addr arg
5238 setup insn. If we don't find matching arg setup
5239 relocs, don't do any tls optimization. */
5240 if (pass == 0
5241 && sec->has_tls_get_addr_call
5242 && h != NULL
5243 && h == htab->tls_get_addr
5244 && !expecting_tls_get_addr
5245 && is_branch_reloc (r_type))
5246 {
5247 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5248 "TLS optimization disabled\n",
5249 ibfd, sec, rel->r_offset);
5250 if (elf_section_data (sec)->relocs != relstart)
5251 free (relstart);
5252 return TRUE;
5253 }
5254
5255 expecting_tls_get_addr = 0;
5256 switch (r_type)
5257 {
5258 case R_PPC_GOT_TLSLD16:
5259 case R_PPC_GOT_TLSLD16_LO:
5260 expecting_tls_get_addr = 1;
5261 /* Fall through. */
5262
5263 case R_PPC_GOT_TLSLD16_HI:
5264 case R_PPC_GOT_TLSLD16_HA:
5265 /* These relocs should never be against a symbol
5266 defined in a shared lib. Leave them alone if
5267 that turns out to be the case. */
5268 if (!is_local)
5269 continue;
5270
5271 /* LD -> LE */
5272 tls_set = 0;
5273 tls_clear = TLS_LD;
5274 break;
5275
5276 case R_PPC_GOT_TLSGD16:
5277 case R_PPC_GOT_TLSGD16_LO:
5278 expecting_tls_get_addr = 1;
5279 /* Fall through. */
5280
5281 case R_PPC_GOT_TLSGD16_HI:
5282 case R_PPC_GOT_TLSGD16_HA:
5283 if (is_local)
5284 /* GD -> LE */
5285 tls_set = 0;
5286 else
5287 /* GD -> IE */
5288 tls_set = TLS_TLS | TLS_TPRELGD;
5289 tls_clear = TLS_GD;
5290 break;
5291
5292 case R_PPC_GOT_TPREL16:
5293 case R_PPC_GOT_TPREL16_LO:
5294 case R_PPC_GOT_TPREL16_HI:
5295 case R_PPC_GOT_TPREL16_HA:
5296 if (is_local)
5297 {
5298 /* IE -> LE */
5299 tls_set = 0;
5300 tls_clear = TLS_TPREL;
5301 break;
5302 }
5303 else
5304 continue;
5305
5306 case R_PPC_TLSGD:
5307 case R_PPC_TLSLD:
5308 expecting_tls_get_addr = 2;
5309 tls_set = 0;
5310 tls_clear = 0;
5311 break;
5312
5313 default:
5314 continue;
5315 }
5316
5317 if (pass == 0)
5318 {
5319 if (!expecting_tls_get_addr
5320 || (expecting_tls_get_addr == 1
5321 && !sec->has_tls_get_addr_call))
5322 continue;
5323
5324 if (rel + 1 < relend
5325 && branch_reloc_hash_match (ibfd, rel + 1,
5326 htab->tls_get_addr))
5327 continue;
5328
5329 /* Uh oh, we didn't find the expected call. We
5330 could just mark this symbol to exclude it
5331 from tls optimization but it's safer to skip
5332 the entire optimization. */
5333 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5334 "TLS optimization disabled\n"),
5335 ibfd, sec, rel->r_offset);
5336 if (elf_section_data (sec)->relocs != relstart)
5337 free (relstart);
5338 return TRUE;
5339 }
5340
5341 if (expecting_tls_get_addr)
5342 {
5343 struct plt_entry *ent;
5344 bfd_vma addend = 0;
5345
5346 if (bfd_link_pic (info)
5347 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5348 addend = rel[1].r_addend;
5349 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5350 got2, addend);
5351 if (ent != NULL && ent->plt.refcount > 0)
5352 ent->plt.refcount -= 1;
5353
5354 if (expecting_tls_get_addr == 2)
5355 continue;
5356 }
5357
5358 if (h != NULL)
5359 {
5360 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5361 got_count = &h->got.refcount;
5362 }
5363 else
5364 {
5365 bfd_signed_vma *lgot_refs;
5366 struct plt_entry **local_plt;
5367 char *lgot_masks;
5368
5369 if (locsyms == NULL)
5370 {
5371 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5372 if (locsyms == NULL)
5373 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5374 symtab_hdr->sh_info,
5375 0, NULL, NULL, NULL);
5376 if (locsyms == NULL)
5377 {
5378 if (elf_section_data (sec)->relocs != relstart)
5379 free (relstart);
5380 return FALSE;
5381 }
5382 }
5383 lgot_refs = elf_local_got_refcounts (ibfd);
5384 if (lgot_refs == NULL)
5385 abort ();
5386 local_plt = (struct plt_entry **)
5387 (lgot_refs + symtab_hdr->sh_info);
5388 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5389 tls_mask = &lgot_masks[r_symndx];
5390 got_count = &lgot_refs[r_symndx];
5391 }
5392
5393 if (tls_set == 0)
5394 {
5395 /* We managed to get rid of a got entry. */
5396 if (*got_count > 0)
5397 *got_count -= 1;
5398 }
5399
5400 *tls_mask |= tls_set;
5401 *tls_mask &= ~tls_clear;
5402 }
5403
5404 if (elf_section_data (sec)->relocs != relstart)
5405 free (relstart);
5406 }
5407
5408 if (locsyms != NULL
5409 && (symtab_hdr->contents != (unsigned char *) locsyms))
5410 {
5411 if (!info->keep_memory)
5412 free (locsyms);
5413 else
5414 symtab_hdr->contents = (unsigned char *) locsyms;
5415 }
5416 }
5417 htab->do_tls_opt = 1;
5418 return TRUE;
5419 }
5420 \f
5421 /* Find dynamic relocs for H that apply to read-only sections. */
5422
5423 static asection *
5424 readonly_dynrelocs (struct elf_link_hash_entry *h)
5425 {
5426 struct elf_dyn_relocs *p;
5427
5428 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5429 {
5430 asection *s = p->sec->output_section;
5431
5432 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5433 return p->sec;
5434 }
5435 return NULL;
5436 }
5437
5438 /* Return true if we have dynamic relocs against H or any of its weak
5439 aliases, that apply to read-only sections. Cannot be used after
5440 size_dynamic_sections. */
5441
5442 static bfd_boolean
5443 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
5444 {
5445 struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h);
5446 do
5447 {
5448 if (readonly_dynrelocs (&eh->elf))
5449 return TRUE;
5450 eh = ppc_elf_hash_entry (eh->elf.u.alias);
5451 } while (eh != NULL && &eh->elf != h);
5452
5453 return FALSE;
5454 }
5455
5456 /* Return whether H has pc-relative dynamic relocs. */
5457
5458 static bfd_boolean
5459 pc_dynrelocs (struct elf_link_hash_entry *h)
5460 {
5461 struct elf_dyn_relocs *p;
5462
5463 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5464 if (p->pc_count != 0)
5465 return TRUE;
5466 return FALSE;
5467 }
5468
5469 /* Adjust a symbol defined by a dynamic object and referenced by a
5470 regular object. The current definition is in some section of the
5471 dynamic object, but we're not including those sections. We have to
5472 change the definition to something the rest of the link can
5473 understand. */
5474
5475 static bfd_boolean
5476 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5477 struct elf_link_hash_entry *h)
5478 {
5479 struct ppc_elf_link_hash_table *htab;
5480 asection *s;
5481
5482 #ifdef DEBUG
5483 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5484 h->root.root.string);
5485 #endif
5486
5487 /* Make sure we know what is going on here. */
5488 htab = ppc_elf_hash_table (info);
5489 BFD_ASSERT (htab->elf.dynobj != NULL
5490 && (h->needs_plt
5491 || h->type == STT_GNU_IFUNC
5492 || h->is_weakalias
5493 || (h->def_dynamic
5494 && h->ref_regular
5495 && !h->def_regular)));
5496
5497 /* Deal with function syms. */
5498 if (h->type == STT_FUNC
5499 || h->type == STT_GNU_IFUNC
5500 || h->needs_plt)
5501 {
5502 bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, h)
5503 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
5504 /* Discard dyn_relocs when non-pic if we've decided that a
5505 function symbol is local. */
5506 if (!bfd_link_pic (info) && local)
5507 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5508
5509 /* Clear procedure linkage table information for any symbol that
5510 won't need a .plt entry. */
5511 struct plt_entry *ent;
5512 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5513 if (ent->plt.refcount > 0)
5514 break;
5515 if (ent == NULL
5516 || (h->type != STT_GNU_IFUNC && local))
5517 {
5518 /* A PLT entry is not required/allowed when:
5519
5520 1. We are not using ld.so; because then the PLT entry
5521 can't be set up, so we can't use one. In this case,
5522 ppc_elf_adjust_dynamic_symbol won't even be called.
5523
5524 2. GC has rendered the entry unused.
5525
5526 3. We know for certain that a call to this symbol
5527 will go to this object, or will remain undefined. */
5528 h->plt.plist = NULL;
5529 h->needs_plt = 0;
5530 h->pointer_equality_needed = 0;
5531 }
5532 else
5533 {
5534 /* Taking a function's address in a read/write section
5535 doesn't require us to define the function symbol in the
5536 executable on a plt call stub. A dynamic reloc can
5537 be used instead, giving better runtime performance.
5538 (Calls via that function pointer don't need to bounce
5539 through the plt call stub.) Similarly, use a dynamic
5540 reloc for a weak reference when possible, allowing the
5541 resolution of the symbol to be set at load time rather
5542 than link time. */
5543 if ((h->pointer_equality_needed
5544 || (h->non_got_ref
5545 && !h->ref_regular_nonweak
5546 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5547 && !htab->is_vxworks
5548 && !ppc_elf_hash_entry (h)->has_sda_refs
5549 && !readonly_dynrelocs (h))
5550 {
5551 h->pointer_equality_needed = 0;
5552 /* If we haven't seen a branch reloc then we don't need
5553 a plt entry. */
5554 if (!h->needs_plt)
5555 h->plt.plist = NULL;
5556 }
5557 else if (!bfd_link_pic (info))
5558 /* We are going to be defining the function symbol on the
5559 plt stub, so no dyn_relocs needed when non-pic. */
5560 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5561 }
5562 h->protected_def = 0;
5563 /* Function symbols can't have copy relocs. */
5564 return TRUE;
5565 }
5566 else
5567 h->plt.plist = NULL;
5568
5569 /* If this is a weak symbol, and there is a real definition, the
5570 processor independent code will have arranged for us to see the
5571 real definition first, and we can just use the same value. */
5572 if (h->is_weakalias)
5573 {
5574 struct elf_link_hash_entry *def = weakdef (h);
5575 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5576 h->root.u.def.section = def->root.u.def.section;
5577 h->root.u.def.value = def->root.u.def.value;
5578 if (ELIMINATE_COPY_RELOCS)
5579 h->non_got_ref = def->non_got_ref;
5580 return TRUE;
5581 }
5582
5583 /* This is a reference to a symbol defined by a dynamic object which
5584 is not a function. */
5585
5586 /* If we are creating a shared library, we must presume that the
5587 only references to the symbol are via the global offset table.
5588 For such cases we need not do anything here; the relocations will
5589 be handled correctly by relocate_section. */
5590 if (bfd_link_pic (info))
5591 {
5592 h->protected_def = 0;
5593 return TRUE;
5594 }
5595
5596 /* If there are no references to this symbol that do not use the
5597 GOT, we don't need to generate a copy reloc. */
5598 if (!h->non_got_ref)
5599 {
5600 h->protected_def = 0;
5601 return TRUE;
5602 }
5603
5604 /* Protected variables do not work with .dynbss. The copy in
5605 .dynbss won't be used by the shared library with the protected
5606 definition for the variable. Editing to PIC, or text relocations
5607 are preferable to an incorrect program. */
5608 if (h->protected_def)
5609 {
5610 if (ELIMINATE_COPY_RELOCS
5611 && ppc_elf_hash_entry (h)->has_addr16_ha
5612 && ppc_elf_hash_entry (h)->has_addr16_lo
5613 && htab->params->pic_fixup == 0
5614 && info->disable_target_specific_optimizations <= 1)
5615 htab->params->pic_fixup = 1;
5616 return TRUE;
5617 }
5618
5619 /* If -z nocopyreloc was given, we won't generate them either. */
5620 if (info->nocopyreloc)
5621 return TRUE;
5622
5623 /* If we didn't find any dynamic relocs in read-only sections, then
5624 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5625 We can't do this if there are any small data relocations. This
5626 doesn't work on VxWorks, where we can not have dynamic
5627 relocations (other than copy and jump slot relocations) in an
5628 executable. */
5629 if (ELIMINATE_COPY_RELOCS
5630 && !ppc_elf_hash_entry (h)->has_sda_refs
5631 && !htab->is_vxworks
5632 && !h->def_regular
5633 && !alias_readonly_dynrelocs (h))
5634 return TRUE;
5635
5636 /* We must allocate the symbol in our .dynbss section, which will
5637 become part of the .bss section of the executable. There will be
5638 an entry for this symbol in the .dynsym section. The dynamic
5639 object will contain position independent code, so all references
5640 from the dynamic object to this symbol will go through the global
5641 offset table. The dynamic linker will use the .dynsym entry to
5642 determine the address it must put in the global offset table, so
5643 both the dynamic object and the regular object will refer to the
5644 same memory location for the variable.
5645
5646 Of course, if the symbol is referenced using SDAREL relocs, we
5647 must instead allocate it in .sbss. */
5648
5649 if (ppc_elf_hash_entry (h)->has_sda_refs)
5650 s = htab->dynsbss;
5651 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5652 s = htab->elf.sdynrelro;
5653 else
5654 s = htab->elf.sdynbss;
5655 BFD_ASSERT (s != NULL);
5656
5657 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5658 copy the initial value out of the dynamic object and into the
5659 runtime process image. We need to remember the offset into the
5660 .rela.bss section we are going to use. */
5661 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5662 {
5663 asection *srel;
5664
5665 if (ppc_elf_hash_entry (h)->has_sda_refs)
5666 srel = htab->relsbss;
5667 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5668 srel = htab->elf.sreldynrelro;
5669 else
5670 srel = htab->elf.srelbss;
5671 BFD_ASSERT (srel != NULL);
5672 srel->size += sizeof (Elf32_External_Rela);
5673 h->needs_copy = 1;
5674 }
5675
5676 /* We no longer want dyn_relocs. */
5677 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5678 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5679 }
5680 \f
5681 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5682 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5683 specifying the addend on the plt relocation. For -fpic code, the sym
5684 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5685 xxxxxxxx.got2.plt_pic32.<callee>. */
5686
5687 static bfd_boolean
5688 add_stub_sym (struct plt_entry *ent,
5689 struct elf_link_hash_entry *h,
5690 struct bfd_link_info *info)
5691 {
5692 struct elf_link_hash_entry *sh;
5693 size_t len1, len2, len3;
5694 char *name;
5695 const char *stub;
5696 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5697
5698 if (bfd_link_pic (info))
5699 stub = ".plt_pic32.";
5700 else
5701 stub = ".plt_call32.";
5702
5703 len1 = strlen (h->root.root.string);
5704 len2 = strlen (stub);
5705 len3 = 0;
5706 if (ent->sec)
5707 len3 = strlen (ent->sec->name);
5708 name = bfd_malloc (len1 + len2 + len3 + 9);
5709 if (name == NULL)
5710 return FALSE;
5711 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5712 if (ent->sec)
5713 memcpy (name + 8, ent->sec->name, len3);
5714 memcpy (name + 8 + len3, stub, len2);
5715 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5716 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5717 if (sh == NULL)
5718 return FALSE;
5719 if (sh->root.type == bfd_link_hash_new)
5720 {
5721 sh->root.type = bfd_link_hash_defined;
5722 sh->root.u.def.section = htab->glink;
5723 sh->root.u.def.value = ent->glink_offset;
5724 sh->ref_regular = 1;
5725 sh->def_regular = 1;
5726 sh->ref_regular_nonweak = 1;
5727 sh->forced_local = 1;
5728 sh->non_elf = 0;
5729 sh->root.linker_def = 1;
5730 }
5731 return TRUE;
5732 }
5733
5734 /* Allocate NEED contiguous space in .got, and return the offset.
5735 Handles allocation of the got header when crossing 32k. */
5736
5737 static bfd_vma
5738 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5739 {
5740 bfd_vma where;
5741 unsigned int max_before_header;
5742
5743 if (htab->plt_type == PLT_VXWORKS)
5744 {
5745 where = htab->elf.sgot->size;
5746 htab->elf.sgot->size += need;
5747 }
5748 else
5749 {
5750 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5751 if (need <= htab->got_gap)
5752 {
5753 where = max_before_header - htab->got_gap;
5754 htab->got_gap -= need;
5755 }
5756 else
5757 {
5758 if (htab->elf.sgot->size + need > max_before_header
5759 && htab->elf.sgot->size <= max_before_header)
5760 {
5761 htab->got_gap = max_before_header - htab->elf.sgot->size;
5762 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5763 }
5764 where = htab->elf.sgot->size;
5765 htab->elf.sgot->size += need;
5766 }
5767 }
5768 return where;
5769 }
5770
5771 /* Calculate size of GOT entries for symbol given its TLS_MASK.
5772 TLS_LD is excluded because those go in a special GOT slot. */
5773
5774 static inline unsigned int
5775 got_entries_needed (int tls_mask)
5776 {
5777 unsigned int need;
5778 if ((tls_mask & TLS_TLS) == 0)
5779 need = 4;
5780 else
5781 {
5782 need = 0;
5783 if ((tls_mask & TLS_GD) != 0)
5784 need += 8;
5785 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5786 need += 4;
5787 if ((tls_mask & TLS_DTPREL) != 0)
5788 need += 4;
5789 }
5790 return need;
5791 }
5792
5793 /* Calculate size of relocs needed for symbol given its TLS_MASK and
5794 NEEDed GOT entries. KNOWN says a TPREL offset can be calculated at
5795 link time. */
5796
5797 static inline unsigned int
5798 got_relocs_needed (int tls_mask, unsigned int need, bfd_boolean known)
5799 {
5800 /* All the entries we allocated need relocs.
5801 Except IE in executable with a local symbol. We could also omit
5802 the DTPREL reloc on the second word of a GD entry under the same
5803 condition as that for IE, but ld.so needs to differentiate
5804 LD and GD entries. */
5805 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0 && known)
5806 need -= 4;
5807 return need * sizeof (Elf32_External_Rela) / 4;
5808 }
5809
5810 /* If H is undefined, make it dynamic if that makes sense. */
5811
5812 static bfd_boolean
5813 ensure_undef_dynamic (struct bfd_link_info *info,
5814 struct elf_link_hash_entry *h)
5815 {
5816 struct elf_link_hash_table *htab = elf_hash_table (info);
5817
5818 if (htab->dynamic_sections_created
5819 && ((info->dynamic_undefined_weak != 0
5820 && h->root.type == bfd_link_hash_undefweak)
5821 || h->root.type == bfd_link_hash_undefined)
5822 && h->dynindx == -1
5823 && !h->forced_local
5824 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5825 return bfd_elf_link_record_dynamic_symbol (info, h);
5826 return TRUE;
5827 }
5828
5829 /* Allocate space in associated reloc sections for dynamic relocs. */
5830
5831 static bfd_boolean
5832 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5833 {
5834 struct bfd_link_info *info = inf;
5835 struct ppc_elf_link_hash_entry *eh;
5836 struct ppc_elf_link_hash_table *htab;
5837 struct elf_dyn_relocs *p;
5838 bfd_boolean dyn;
5839
5840 if (h->root.type == bfd_link_hash_indirect)
5841 return TRUE;
5842
5843 htab = ppc_elf_hash_table (info);
5844 eh = (struct ppc_elf_link_hash_entry *) h;
5845 if (eh->elf.got.refcount > 0
5846 || (ELIMINATE_COPY_RELOCS
5847 && !eh->elf.def_regular
5848 && eh->elf.protected_def
5849 && eh->has_addr16_ha
5850 && eh->has_addr16_lo
5851 && htab->params->pic_fixup > 0))
5852 {
5853 unsigned int need;
5854
5855 /* Make sure this symbol is output as a dynamic symbol. */
5856 if (!ensure_undef_dynamic (info, &eh->elf))
5857 return FALSE;
5858
5859 need = 0;
5860 if ((eh->tls_mask & TLS_LD) != 0)
5861 {
5862 if (!eh->elf.def_dynamic)
5863 /* We'll just use htab->tlsld_got.offset. This should
5864 always be the case. It's a little odd if we have
5865 a local dynamic reloc against a non-local symbol. */
5866 htab->tlsld_got.refcount += 1;
5867 else
5868 need += 8;
5869 }
5870 need += got_entries_needed (eh->tls_mask);
5871 if (need == 0)
5872 eh->elf.got.offset = (bfd_vma) -1;
5873 else
5874 {
5875 eh->elf.got.offset = allocate_got (htab, need);
5876 if ((bfd_link_pic (info)
5877 || (htab->elf.dynamic_sections_created
5878 && eh->elf.dynindx != -1
5879 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
5880 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
5881 {
5882 asection *rsec;
5883 bfd_boolean tprel_known = (bfd_link_executable (info)
5884 && SYMBOL_REFERENCES_LOCAL (info,
5885 &eh->elf));
5886
5887 need = got_relocs_needed (eh->tls_mask, need, tprel_known);
5888 if ((eh->tls_mask & TLS_LD) != 0 && eh->elf.def_dynamic)
5889 need -= sizeof (Elf32_External_Rela);
5890 rsec = htab->elf.srelgot;
5891 if (eh->elf.type == STT_GNU_IFUNC)
5892 rsec = htab->elf.irelplt;
5893 rsec->size += need;
5894 }
5895 }
5896 }
5897 else
5898 eh->elf.got.offset = (bfd_vma) -1;
5899
5900 /* If no dynamic sections we can't have dynamic relocs, except for
5901 IFUNCs which are handled even in static executables. */
5902 if (!htab->elf.dynamic_sections_created
5903 && h->type != STT_GNU_IFUNC)
5904 eh->dyn_relocs = NULL;
5905
5906 /* Discard relocs on undefined symbols that must be local. */
5907 else if (h->root.type == bfd_link_hash_undefined
5908 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5909 eh->dyn_relocs = NULL;
5910
5911 /* Also discard relocs on undefined weak syms with non-default
5912 visibility, or when dynamic_undefined_weak says so. */
5913 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
5914 eh->dyn_relocs = NULL;
5915
5916 if (eh->dyn_relocs == NULL)
5917 ;
5918
5919 /* In the shared -Bsymbolic case, discard space allocated for
5920 dynamic pc-relative relocs against symbols which turn out to be
5921 defined in regular objects. For the normal shared case, discard
5922 space for relocs that have become local due to symbol visibility
5923 changes. */
5924 else if (bfd_link_pic (info))
5925 {
5926 /* Relocs that use pc_count are those that appear on a call insn,
5927 or certain REL relocs (see must_be_dyn_reloc) that can be
5928 generated via assembly. We want calls to protected symbols to
5929 resolve directly to the function rather than going via the plt.
5930 If people want function pointer comparisons to work as expected
5931 then they should avoid writing weird assembly. */
5932 if (SYMBOL_CALLS_LOCAL (info, h))
5933 {
5934 struct elf_dyn_relocs **pp;
5935
5936 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5937 {
5938 p->count -= p->pc_count;
5939 p->pc_count = 0;
5940 if (p->count == 0)
5941 *pp = p->next;
5942 else
5943 pp = &p->next;
5944 }
5945 }
5946
5947 if (htab->is_vxworks)
5948 {
5949 struct elf_dyn_relocs **pp;
5950
5951 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5952 {
5953 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5954 *pp = p->next;
5955 else
5956 pp = &p->next;
5957 }
5958 }
5959
5960 if (eh->dyn_relocs != NULL)
5961 {
5962 /* Make sure this symbol is output as a dynamic symbol. */
5963 if (!ensure_undef_dynamic (info, h))
5964 return FALSE;
5965 }
5966 }
5967 else if (ELIMINATE_COPY_RELOCS)
5968 {
5969 /* For the non-pic case, discard space for relocs against
5970 symbols which turn out to need copy relocs or are not
5971 dynamic. */
5972 if (h->dynamic_adjusted
5973 && !h->def_regular
5974 && !ELF_COMMON_DEF_P (h)
5975 && !(h->protected_def
5976 && eh->has_addr16_ha
5977 && eh->has_addr16_lo
5978 && htab->params->pic_fixup > 0))
5979 {
5980 /* Make sure this symbol is output as a dynamic symbol. */
5981 if (!ensure_undef_dynamic (info, h))
5982 return FALSE;
5983
5984 if (h->dynindx == -1)
5985 eh->dyn_relocs = NULL;
5986 }
5987 else
5988 eh->dyn_relocs = NULL;
5989 }
5990
5991 /* Allocate space. */
5992 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5993 {
5994 asection *sreloc = elf_section_data (p->sec)->sreloc;
5995 if (eh->elf.type == STT_GNU_IFUNC)
5996 sreloc = htab->elf.irelplt;
5997 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5998 }
5999
6000 /* Handle PLT relocs. Done last, after dynindx has settled. */
6001 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6002 if (dyn || h->type == STT_GNU_IFUNC)
6003 {
6004 struct plt_entry *ent;
6005 bfd_boolean doneone = FALSE;
6006 bfd_vma plt_offset = 0, glink_offset = 0;
6007
6008 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6009 if (ent->plt.refcount > 0)
6010 {
6011 asection *s = htab->elf.splt;
6012
6013 if (!dyn)
6014 s = htab->elf.iplt;
6015
6016 if (htab->plt_type == PLT_NEW || !dyn)
6017 {
6018 if (!doneone)
6019 {
6020 plt_offset = s->size;
6021 s->size += 4;
6022 }
6023 ent->plt.offset = plt_offset;
6024
6025 s = htab->glink;
6026 if (!doneone || bfd_link_pic (info))
6027 {
6028 glink_offset = s->size;
6029 s->size += GLINK_ENTRY_SIZE;
6030 if (h == htab->tls_get_addr
6031 && !htab->params->no_tls_get_addr_opt)
6032 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
6033 }
6034 if (!doneone
6035 && !bfd_link_pic (info)
6036 && h->def_dynamic
6037 && !h->def_regular)
6038 {
6039 h->root.u.def.section = s;
6040 h->root.u.def.value = glink_offset;
6041 }
6042 ent->glink_offset = glink_offset;
6043
6044 if (htab->params->emit_stub_syms
6045 && !add_stub_sym (ent, h, info))
6046 return FALSE;
6047 }
6048 else
6049 {
6050 if (!doneone)
6051 {
6052 /* If this is the first .plt entry, make room
6053 for the special first entry. */
6054 if (s->size == 0)
6055 s->size += htab->plt_initial_entry_size;
6056
6057 /* The PowerPC PLT is actually composed of two
6058 parts, the first part is 2 words (for a load
6059 and a jump), and then there is a remaining
6060 word available at the end. */
6061 plt_offset = (htab->plt_initial_entry_size
6062 + (htab->plt_slot_size
6063 * ((s->size
6064 - htab->plt_initial_entry_size)
6065 / htab->plt_entry_size)));
6066
6067 /* If this symbol is not defined in a regular
6068 file, and we are not generating a shared
6069 library, then set the symbol to this location
6070 in the .plt. This is to avoid text
6071 relocations, and is required to make
6072 function pointers compare as equal between
6073 the normal executable and the shared library. */
6074 if (! bfd_link_pic (info)
6075 && h->def_dynamic
6076 && !h->def_regular)
6077 {
6078 h->root.u.def.section = s;
6079 h->root.u.def.value = plt_offset;
6080 }
6081
6082 /* Make room for this entry. */
6083 s->size += htab->plt_entry_size;
6084 /* After the 8192nd entry, room for two entries
6085 is allocated. */
6086 if (htab->plt_type == PLT_OLD
6087 && (s->size - htab->plt_initial_entry_size)
6088 / htab->plt_entry_size
6089 > PLT_NUM_SINGLE_ENTRIES)
6090 s->size += htab->plt_entry_size;
6091 }
6092 ent->plt.offset = plt_offset;
6093 }
6094
6095 /* We also need to make an entry in the .rela.plt section. */
6096 if (!doneone)
6097 {
6098 if (!dyn)
6099 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6100 else
6101 {
6102 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6103
6104 if (htab->plt_type == PLT_VXWORKS)
6105 {
6106 /* Allocate space for the unloaded relocations. */
6107 if (!bfd_link_pic (info)
6108 && htab->elf.dynamic_sections_created)
6109 {
6110 if (ent->plt.offset
6111 == (bfd_vma) htab->plt_initial_entry_size)
6112 {
6113 htab->srelplt2->size
6114 += (sizeof (Elf32_External_Rela)
6115 * VXWORKS_PLTRESOLVE_RELOCS);
6116 }
6117
6118 htab->srelplt2->size
6119 += (sizeof (Elf32_External_Rela)
6120 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6121 }
6122
6123 /* Every PLT entry has an associated GOT entry in
6124 .got.plt. */
6125 htab->elf.sgotplt->size += 4;
6126 }
6127 }
6128 doneone = TRUE;
6129 }
6130 }
6131 else
6132 ent->plt.offset = (bfd_vma) -1;
6133
6134 if (!doneone)
6135 {
6136 h->plt.plist = NULL;
6137 h->needs_plt = 0;
6138 }
6139 }
6140 else
6141 {
6142 h->plt.plist = NULL;
6143 h->needs_plt = 0;
6144 }
6145
6146 return TRUE;
6147 }
6148
6149 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6150 read-only sections. */
6151
6152 static bfd_boolean
6153 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6154 {
6155 asection *sec;
6156
6157 if (h->root.type == bfd_link_hash_indirect)
6158 return TRUE;
6159
6160 sec = readonly_dynrelocs (h);
6161 if (sec != NULL)
6162 {
6163 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
6164
6165 info->flags |= DF_TEXTREL;
6166 info->callbacks->minfo
6167 (_("%B: dynamic relocation in read-only section `%A'\n"),
6168 sec->owner, sec);
6169
6170 /* Not an error, just cut short the traversal. */
6171 return FALSE;
6172 }
6173 return TRUE;
6174 }
6175
6176 static const unsigned char glink_eh_frame_cie[] =
6177 {
6178 0, 0, 0, 16, /* length. */
6179 0, 0, 0, 0, /* id. */
6180 1, /* CIE version. */
6181 'z', 'R', 0, /* Augmentation string. */
6182 4, /* Code alignment. */
6183 0x7c, /* Data alignment. */
6184 65, /* RA reg. */
6185 1, /* Augmentation size. */
6186 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6187 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6188 };
6189
6190 /* Set the sizes of the dynamic sections. */
6191
6192 static bfd_boolean
6193 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6194 struct bfd_link_info *info)
6195 {
6196 struct ppc_elf_link_hash_table *htab;
6197 asection *s;
6198 bfd_boolean relocs;
6199 bfd *ibfd;
6200
6201 #ifdef DEBUG
6202 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6203 #endif
6204
6205 htab = ppc_elf_hash_table (info);
6206 BFD_ASSERT (htab->elf.dynobj != NULL);
6207
6208 if (elf_hash_table (info)->dynamic_sections_created)
6209 {
6210 /* Set the contents of the .interp section to the interpreter. */
6211 if (bfd_link_executable (info) && !info->nointerp)
6212 {
6213 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6214 BFD_ASSERT (s != NULL);
6215 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6216 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6217 }
6218 }
6219
6220 if (htab->plt_type == PLT_OLD)
6221 htab->got_header_size = 16;
6222 else if (htab->plt_type == PLT_NEW)
6223 htab->got_header_size = 12;
6224
6225 /* Set up .got offsets for local syms, and space for local dynamic
6226 relocs. */
6227 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6228 {
6229 bfd_signed_vma *local_got;
6230 bfd_signed_vma *end_local_got;
6231 struct plt_entry **local_plt;
6232 struct plt_entry **end_local_plt;
6233 char *lgot_masks;
6234 bfd_size_type locsymcount;
6235 Elf_Internal_Shdr *symtab_hdr;
6236
6237 if (!is_ppc_elf (ibfd))
6238 continue;
6239
6240 for (s = ibfd->sections; s != NULL; s = s->next)
6241 {
6242 struct ppc_dyn_relocs *p;
6243
6244 for (p = ((struct ppc_dyn_relocs *)
6245 elf_section_data (s)->local_dynrel);
6246 p != NULL;
6247 p = p->next)
6248 {
6249 if (!bfd_is_abs_section (p->sec)
6250 && bfd_is_abs_section (p->sec->output_section))
6251 {
6252 /* Input section has been discarded, either because
6253 it is a copy of a linkonce section or due to
6254 linker script /DISCARD/, so we'll be discarding
6255 the relocs too. */
6256 }
6257 else if (htab->is_vxworks
6258 && strcmp (p->sec->output_section->name,
6259 ".tls_vars") == 0)
6260 {
6261 /* Relocations in vxworks .tls_vars sections are
6262 handled specially by the loader. */
6263 }
6264 else if (p->count != 0)
6265 {
6266 asection *sreloc = elf_section_data (p->sec)->sreloc;
6267 if (p->ifunc)
6268 sreloc = htab->elf.irelplt;
6269 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6270 if ((p->sec->output_section->flags
6271 & (SEC_READONLY | SEC_ALLOC))
6272 == (SEC_READONLY | SEC_ALLOC))
6273 {
6274 info->flags |= DF_TEXTREL;
6275 info->callbacks->minfo (_("%B: dynamic relocation in read-only section `%A'\n"),
6276 p->sec->owner, p->sec);
6277 }
6278 }
6279 }
6280 }
6281
6282 local_got = elf_local_got_refcounts (ibfd);
6283 if (!local_got)
6284 continue;
6285
6286 symtab_hdr = &elf_symtab_hdr (ibfd);
6287 locsymcount = symtab_hdr->sh_info;
6288 end_local_got = local_got + locsymcount;
6289 local_plt = (struct plt_entry **) end_local_got;
6290 end_local_plt = local_plt + locsymcount;
6291 lgot_masks = (char *) end_local_plt;
6292
6293 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6294 if (*local_got > 0)
6295 {
6296 unsigned int need;
6297 if ((*lgot_masks & TLS_LD) != 0)
6298 htab->tlsld_got.refcount += 1;
6299 need = got_entries_needed (*lgot_masks);
6300 if (need == 0)
6301 *local_got = (bfd_vma) -1;
6302 else
6303 {
6304 *local_got = allocate_got (htab, need);
6305 if (bfd_link_pic (info))
6306 {
6307 asection *srel;
6308 bfd_boolean tprel_known = bfd_link_executable (info);
6309
6310 need = got_relocs_needed (*lgot_masks, need, tprel_known);
6311 srel = htab->elf.srelgot;
6312 if ((*lgot_masks & PLT_IFUNC) != 0)
6313 srel = htab->elf.irelplt;
6314 srel->size += need;
6315 }
6316 }
6317 }
6318 else
6319 *local_got = (bfd_vma) -1;
6320
6321 if (htab->is_vxworks)
6322 continue;
6323
6324 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6325 for (; local_plt < end_local_plt; ++local_plt)
6326 {
6327 struct plt_entry *ent;
6328 bfd_boolean doneone = FALSE;
6329 bfd_vma plt_offset = 0, glink_offset = 0;
6330
6331 for (ent = *local_plt; ent != NULL; ent = ent->next)
6332 if (ent->plt.refcount > 0)
6333 {
6334 s = htab->elf.iplt;
6335
6336 if (!doneone)
6337 {
6338 plt_offset = s->size;
6339 s->size += 4;
6340 }
6341 ent->plt.offset = plt_offset;
6342
6343 s = htab->glink;
6344 if (!doneone || bfd_link_pic (info))
6345 {
6346 glink_offset = s->size;
6347 s->size += GLINK_ENTRY_SIZE;
6348 }
6349 ent->glink_offset = glink_offset;
6350
6351 if (!doneone)
6352 {
6353 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6354 doneone = TRUE;
6355 }
6356 }
6357 else
6358 ent->plt.offset = (bfd_vma) -1;
6359 }
6360 }
6361
6362 /* Allocate space for global sym dynamic relocs. */
6363 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6364
6365 if (htab->tlsld_got.refcount > 0)
6366 {
6367 htab->tlsld_got.offset = allocate_got (htab, 8);
6368 if (bfd_link_pic (info))
6369 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6370 }
6371 else
6372 htab->tlsld_got.offset = (bfd_vma) -1;
6373
6374 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6375 {
6376 unsigned int g_o_t = 32768;
6377
6378 /* If we haven't allocated the header, do so now. When we get here,
6379 for old plt/got the got size will be 0 to 32764 (not allocated),
6380 or 32780 to 65536 (header allocated). For new plt/got, the
6381 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6382 if (htab->elf.sgot->size <= 32768)
6383 {
6384 g_o_t = htab->elf.sgot->size;
6385 if (htab->plt_type == PLT_OLD)
6386 g_o_t += 4;
6387 htab->elf.sgot->size += htab->got_header_size;
6388 }
6389
6390 htab->elf.hgot->root.u.def.value = g_o_t;
6391 }
6392 if (bfd_link_pic (info))
6393 {
6394 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6395
6396 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6397 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6398 }
6399 if (info->emitrelocations)
6400 {
6401 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6402
6403 if (sda != NULL && sda->ref_regular)
6404 sda->root.u.def.section->flags |= SEC_KEEP;
6405 sda = htab->sdata[1].sym;
6406 if (sda != NULL && sda->ref_regular)
6407 sda->root.u.def.section->flags |= SEC_KEEP;
6408 }
6409
6410 if (htab->glink != NULL
6411 && htab->glink->size != 0
6412 && htab->elf.dynamic_sections_created)
6413 {
6414 htab->glink_pltresolve = htab->glink->size;
6415 /* Space for the branch table. ??? We don't need entries for
6416 non-dynamic symbols in this table. This case can arise with
6417 static ifuncs or forced local ifuncs. */
6418 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6419 /* Pad out to align the start of PLTresolve. */
6420 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6421 ? 63 : 15);
6422 htab->glink->size += GLINK_PLTRESOLVE;
6423
6424 if (htab->params->emit_stub_syms)
6425 {
6426 struct elf_link_hash_entry *sh;
6427 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6428 TRUE, FALSE, FALSE);
6429 if (sh == NULL)
6430 return FALSE;
6431 if (sh->root.type == bfd_link_hash_new)
6432 {
6433 sh->root.type = bfd_link_hash_defined;
6434 sh->root.u.def.section = htab->glink;
6435 sh->root.u.def.value = htab->glink_pltresolve;
6436 sh->ref_regular = 1;
6437 sh->def_regular = 1;
6438 sh->ref_regular_nonweak = 1;
6439 sh->forced_local = 1;
6440 sh->non_elf = 0;
6441 sh->root.linker_def = 1;
6442 }
6443 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6444 TRUE, FALSE, FALSE);
6445 if (sh == NULL)
6446 return FALSE;
6447 if (sh->root.type == bfd_link_hash_new)
6448 {
6449 sh->root.type = bfd_link_hash_defined;
6450 sh->root.u.def.section = htab->glink;
6451 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6452 sh->ref_regular = 1;
6453 sh->def_regular = 1;
6454 sh->ref_regular_nonweak = 1;
6455 sh->forced_local = 1;
6456 sh->non_elf = 0;
6457 sh->root.linker_def = 1;
6458 }
6459 }
6460 }
6461
6462 if (htab->glink != NULL
6463 && htab->glink->size != 0
6464 && htab->glink_eh_frame != NULL
6465 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6466 && _bfd_elf_eh_frame_present (info))
6467 {
6468 s = htab->glink_eh_frame;
6469 s->size = sizeof (glink_eh_frame_cie) + 20;
6470 if (bfd_link_pic (info))
6471 {
6472 s->size += 4;
6473 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6474 s->size += 4;
6475 }
6476 }
6477
6478 /* We've now determined the sizes of the various dynamic sections.
6479 Allocate memory for them. */
6480 relocs = FALSE;
6481 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6482 {
6483 bfd_boolean strip_section = TRUE;
6484
6485 if ((s->flags & SEC_LINKER_CREATED) == 0)
6486 continue;
6487
6488 if (s == htab->elf.splt
6489 || s == htab->elf.sgot)
6490 {
6491 /* We'd like to strip these sections if they aren't needed, but if
6492 we've exported dynamic symbols from them we must leave them.
6493 It's too late to tell BFD to get rid of the symbols. */
6494 if (htab->elf.hplt != NULL)
6495 strip_section = FALSE;
6496 /* Strip this section if we don't need it; see the
6497 comment below. */
6498 }
6499 else if (s == htab->elf.iplt
6500 || s == htab->glink
6501 || s == htab->glink_eh_frame
6502 || s == htab->elf.sgotplt
6503 || s == htab->sbss
6504 || s == htab->elf.sdynbss
6505 || s == htab->elf.sdynrelro
6506 || s == htab->dynsbss)
6507 {
6508 /* Strip these too. */
6509 }
6510 else if (s == htab->sdata[0].section
6511 || s == htab->sdata[1].section)
6512 {
6513 strip_section = (s->flags & SEC_KEEP) == 0;
6514 }
6515 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6516 ".rela"))
6517 {
6518 if (s->size != 0)
6519 {
6520 /* Remember whether there are any relocation sections. */
6521 relocs = TRUE;
6522
6523 /* We use the reloc_count field as a counter if we need
6524 to copy relocs into the output file. */
6525 s->reloc_count = 0;
6526 }
6527 }
6528 else
6529 {
6530 /* It's not one of our sections, so don't allocate space. */
6531 continue;
6532 }
6533
6534 if (s->size == 0 && strip_section)
6535 {
6536 /* If we don't need this section, strip it from the
6537 output file. This is mostly to handle .rela.bss and
6538 .rela.plt. We must create both sections in
6539 create_dynamic_sections, because they must be created
6540 before the linker maps input sections to output
6541 sections. The linker does that before
6542 adjust_dynamic_symbol is called, and it is that
6543 function which decides whether anything needs to go
6544 into these sections. */
6545 s->flags |= SEC_EXCLUDE;
6546 continue;
6547 }
6548
6549 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6550 continue;
6551
6552 /* Allocate memory for the section contents. */
6553 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6554 if (s->contents == NULL)
6555 return FALSE;
6556 }
6557
6558 if (htab->elf.dynamic_sections_created)
6559 {
6560 /* Add some entries to the .dynamic section. We fill in the
6561 values later, in ppc_elf_finish_dynamic_sections, but we
6562 must add the entries now so that we get the correct size for
6563 the .dynamic section. The DT_DEBUG entry is filled in by the
6564 dynamic linker and used by the debugger. */
6565 #define add_dynamic_entry(TAG, VAL) \
6566 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6567
6568 if (bfd_link_executable (info))
6569 {
6570 if (!add_dynamic_entry (DT_DEBUG, 0))
6571 return FALSE;
6572 }
6573
6574 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6575 {
6576 if (!add_dynamic_entry (DT_PLTGOT, 0)
6577 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6578 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6579 || !add_dynamic_entry (DT_JMPREL, 0))
6580 return FALSE;
6581 }
6582
6583 if (htab->plt_type == PLT_NEW
6584 && htab->glink != NULL
6585 && htab->glink->size != 0)
6586 {
6587 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6588 return FALSE;
6589 if (!htab->params->no_tls_get_addr_opt
6590 && htab->tls_get_addr != NULL
6591 && htab->tls_get_addr->plt.plist != NULL
6592 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6593 return FALSE;
6594 }
6595
6596 if (relocs)
6597 {
6598 if (!add_dynamic_entry (DT_RELA, 0)
6599 || !add_dynamic_entry (DT_RELASZ, 0)
6600 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6601 return FALSE;
6602 }
6603
6604 /* If any dynamic relocs apply to a read-only section, then we
6605 need a DT_TEXTREL entry. */
6606 if ((info->flags & DF_TEXTREL) == 0)
6607 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6608 info);
6609
6610 if ((info->flags & DF_TEXTREL) != 0)
6611 {
6612 if (!add_dynamic_entry (DT_TEXTREL, 0))
6613 return FALSE;
6614 }
6615 if (htab->is_vxworks
6616 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6617 return FALSE;
6618 }
6619 #undef add_dynamic_entry
6620
6621 if (htab->glink_eh_frame != NULL
6622 && htab->glink_eh_frame->contents != NULL)
6623 {
6624 unsigned char *p = htab->glink_eh_frame->contents;
6625 bfd_vma val;
6626
6627 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6628 /* CIE length (rewrite in case little-endian). */
6629 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6630 p += sizeof (glink_eh_frame_cie);
6631 /* FDE length. */
6632 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6633 bfd_put_32 (htab->elf.dynobj, val, p);
6634 p += 4;
6635 /* CIE pointer. */
6636 val = p - htab->glink_eh_frame->contents;
6637 bfd_put_32 (htab->elf.dynobj, val, p);
6638 p += 4;
6639 /* Offset to .glink. Set later. */
6640 p += 4;
6641 /* .glink size. */
6642 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6643 p += 4;
6644 /* Augmentation. */
6645 p += 1;
6646
6647 if (bfd_link_pic (info)
6648 && htab->elf.dynamic_sections_created)
6649 {
6650 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6651 if (adv < 64)
6652 *p++ = DW_CFA_advance_loc + adv;
6653 else if (adv < 256)
6654 {
6655 *p++ = DW_CFA_advance_loc1;
6656 *p++ = adv;
6657 }
6658 else if (adv < 65536)
6659 {
6660 *p++ = DW_CFA_advance_loc2;
6661 bfd_put_16 (htab->elf.dynobj, adv, p);
6662 p += 2;
6663 }
6664 else
6665 {
6666 *p++ = DW_CFA_advance_loc4;
6667 bfd_put_32 (htab->elf.dynobj, adv, p);
6668 p += 4;
6669 }
6670 *p++ = DW_CFA_register;
6671 *p++ = 65;
6672 p++;
6673 *p++ = DW_CFA_advance_loc + 4;
6674 *p++ = DW_CFA_restore_extended;
6675 *p++ = 65;
6676 }
6677 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6678 == htab->glink_eh_frame->size);
6679 }
6680
6681 return TRUE;
6682 }
6683
6684 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6685 if it looks like nothing is using them. */
6686
6687 static void
6688 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6689 {
6690 struct elf_link_hash_entry *sda = lsect->sym;
6691
6692 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6693 {
6694 asection *s;
6695
6696 s = bfd_get_section_by_name (output_bfd, lsect->name);
6697 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6698 {
6699 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6700 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6701 {
6702 sda->def_regular = 0;
6703 /* This is somewhat magic. See elf_link_output_extsym. */
6704 sda->ref_dynamic = 1;
6705 sda->forced_local = 0;
6706 }
6707 }
6708 }
6709 }
6710
6711 void
6712 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6713 {
6714 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6715
6716 if (htab != NULL)
6717 {
6718 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6719 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6720 }
6721 }
6722
6723
6724 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6725
6726 static bfd_boolean
6727 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6728 {
6729 if (h->plt.plist != NULL
6730 && !h->def_regular
6731 && (!h->pointer_equality_needed
6732 || !h->ref_regular_nonweak))
6733 return FALSE;
6734
6735 return _bfd_elf_hash_symbol (h);
6736 }
6737 \f
6738 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6739
6740 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6741 used for some functions that are allowed to break the ABI). */
6742 static const int shared_stub_entry[] =
6743 {
6744 0x7c0802a6, /* mflr 0 */
6745 0x429f0005, /* bcl 20, 31, .Lxxx */
6746 0x7d8802a6, /* mflr 12 */
6747 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6748 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6749 0x7c0803a6, /* mtlr 0 */
6750 0x7d8903a6, /* mtctr 12 */
6751 0x4e800420, /* bctr */
6752 };
6753
6754 static const int stub_entry[] =
6755 {
6756 0x3d800000, /* lis 12,xxx@ha */
6757 0x398c0000, /* addi 12,12,xxx@l */
6758 0x7d8903a6, /* mtctr 12 */
6759 0x4e800420, /* bctr */
6760 };
6761
6762 struct ppc_elf_relax_info
6763 {
6764 unsigned int workaround_size;
6765 unsigned int picfixup_size;
6766 };
6767
6768 /* This function implements long branch trampolines, and the ppc476
6769 icache bug workaround. Any section needing trampolines or patch
6770 space for the workaround has its size extended so that we can
6771 add trampolines at the end of the section. */
6772
6773 static bfd_boolean
6774 ppc_elf_relax_section (bfd *abfd,
6775 asection *isec,
6776 struct bfd_link_info *link_info,
6777 bfd_boolean *again)
6778 {
6779 struct one_branch_fixup
6780 {
6781 struct one_branch_fixup *next;
6782 asection *tsec;
6783 /* Final link, can use the symbol offset. For a
6784 relocatable link we use the symbol's index. */
6785 bfd_vma toff;
6786 bfd_vma trampoff;
6787 };
6788
6789 Elf_Internal_Shdr *symtab_hdr;
6790 bfd_byte *contents = NULL;
6791 Elf_Internal_Sym *isymbuf = NULL;
6792 Elf_Internal_Rela *internal_relocs = NULL;
6793 Elf_Internal_Rela *irel, *irelend = NULL;
6794 struct one_branch_fixup *branch_fixups = NULL;
6795 struct ppc_elf_relax_info *relax_info = NULL;
6796 unsigned changes = 0;
6797 bfd_boolean workaround_change;
6798 struct ppc_elf_link_hash_table *htab;
6799 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6800 asection *got2;
6801 bfd_boolean maybe_pasted;
6802
6803 *again = FALSE;
6804
6805 /* No need to do anything with non-alloc or non-code sections. */
6806 if ((isec->flags & SEC_ALLOC) == 0
6807 || (isec->flags & SEC_CODE) == 0
6808 || (isec->flags & SEC_LINKER_CREATED) != 0
6809 || isec->size < 4)
6810 return TRUE;
6811
6812 /* We cannot represent the required PIC relocs in the output, so don't
6813 do anything. The linker doesn't support mixing -shared and -r
6814 anyway. */
6815 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6816 return TRUE;
6817
6818 htab = ppc_elf_hash_table (link_info);
6819 if (htab == NULL)
6820 return TRUE;
6821
6822 isec->size = (isec->size + 3) & -4;
6823 if (isec->rawsize == 0)
6824 isec->rawsize = isec->size;
6825 trampbase = isec->size;
6826
6827 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6828 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6829 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6830
6831 if (htab->params->ppc476_workaround
6832 || htab->params->pic_fixup > 0)
6833 {
6834 if (elf_section_data (isec)->sec_info == NULL)
6835 {
6836 elf_section_data (isec)->sec_info
6837 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6838 if (elf_section_data (isec)->sec_info == NULL)
6839 return FALSE;
6840 }
6841 relax_info = elf_section_data (isec)->sec_info;
6842 trampbase -= relax_info->workaround_size;
6843 }
6844
6845 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6846 || strcmp (isec->output_section->name, ".fini") == 0);
6847 /* Space for a branch around any trampolines. */
6848 trampoff = trampbase;
6849 if (maybe_pasted && trampbase == isec->rawsize)
6850 trampoff += 4;
6851
6852 symtab_hdr = &elf_symtab_hdr (abfd);
6853 picfixup_size = 0;
6854 if (htab->params->branch_trampolines
6855 || htab->params->pic_fixup > 0)
6856 {
6857 /* Get a copy of the native relocations. */
6858 if (isec->reloc_count != 0)
6859 {
6860 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6861 link_info->keep_memory);
6862 if (internal_relocs == NULL)
6863 goto error_return;
6864 }
6865
6866 got2 = bfd_get_section_by_name (abfd, ".got2");
6867
6868 irelend = internal_relocs + isec->reloc_count;
6869 for (irel = internal_relocs; irel < irelend; irel++)
6870 {
6871 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6872 bfd_vma toff, roff;
6873 asection *tsec;
6874 struct one_branch_fixup *f;
6875 size_t insn_offset = 0;
6876 bfd_vma max_branch_offset = 0, val;
6877 bfd_byte *hit_addr;
6878 unsigned long t0;
6879 struct elf_link_hash_entry *h;
6880 struct plt_entry **plist;
6881 unsigned char sym_type;
6882
6883 switch (r_type)
6884 {
6885 case R_PPC_REL24:
6886 case R_PPC_LOCAL24PC:
6887 case R_PPC_PLTREL24:
6888 max_branch_offset = 1 << 25;
6889 break;
6890
6891 case R_PPC_REL14:
6892 case R_PPC_REL14_BRTAKEN:
6893 case R_PPC_REL14_BRNTAKEN:
6894 max_branch_offset = 1 << 15;
6895 break;
6896
6897 case R_PPC_ADDR16_HA:
6898 if (htab->params->pic_fixup > 0)
6899 break;
6900 continue;
6901
6902 default:
6903 continue;
6904 }
6905
6906 /* Get the value of the symbol referred to by the reloc. */
6907 h = NULL;
6908 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6909 {
6910 /* A local symbol. */
6911 Elf_Internal_Sym *isym;
6912
6913 /* Read this BFD's local symbols. */
6914 if (isymbuf == NULL)
6915 {
6916 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6917 if (isymbuf == NULL)
6918 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6919 symtab_hdr->sh_info, 0,
6920 NULL, NULL, NULL);
6921 if (isymbuf == 0)
6922 goto error_return;
6923 }
6924 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6925 if (isym->st_shndx == SHN_UNDEF)
6926 tsec = bfd_und_section_ptr;
6927 else if (isym->st_shndx == SHN_ABS)
6928 tsec = bfd_abs_section_ptr;
6929 else if (isym->st_shndx == SHN_COMMON)
6930 tsec = bfd_com_section_ptr;
6931 else
6932 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6933
6934 toff = isym->st_value;
6935 sym_type = ELF_ST_TYPE (isym->st_info);
6936 }
6937 else
6938 {
6939 /* Global symbol handling. */
6940 unsigned long indx;
6941
6942 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6943 h = elf_sym_hashes (abfd)[indx];
6944
6945 while (h->root.type == bfd_link_hash_indirect
6946 || h->root.type == bfd_link_hash_warning)
6947 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6948
6949 if (h->root.type == bfd_link_hash_defined
6950 || h->root.type == bfd_link_hash_defweak)
6951 {
6952 tsec = h->root.u.def.section;
6953 toff = h->root.u.def.value;
6954 }
6955 else if (h->root.type == bfd_link_hash_undefined
6956 || h->root.type == bfd_link_hash_undefweak)
6957 {
6958 tsec = bfd_und_section_ptr;
6959 toff = bfd_link_relocatable (link_info) ? indx : 0;
6960 }
6961 else
6962 continue;
6963
6964 /* If this branch is to __tls_get_addr then we may later
6965 optimise away the call. We won't be needing a long-
6966 branch stub in that case. */
6967 if (bfd_link_executable (link_info)
6968 && h == htab->tls_get_addr
6969 && irel != internal_relocs)
6970 {
6971 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6972 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6973 unsigned int tls_mask = 0;
6974
6975 /* The previous reloc should be one of R_PPC_TLSGD or
6976 R_PPC_TLSLD, or for older object files, a reloc
6977 on the __tls_get_addr arg setup insn. Get tls
6978 mask bits from the symbol on that reloc. */
6979 if (t_symndx < symtab_hdr->sh_info)
6980 {
6981 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6982
6983 if (local_got_offsets != NULL)
6984 {
6985 struct plt_entry **local_plt = (struct plt_entry **)
6986 (local_got_offsets + symtab_hdr->sh_info);
6987 char *lgot_masks = (char *)
6988 (local_plt + symtab_hdr->sh_info);
6989 tls_mask = lgot_masks[t_symndx];
6990 }
6991 }
6992 else
6993 {
6994 struct elf_link_hash_entry *th
6995 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6996
6997 while (th->root.type == bfd_link_hash_indirect
6998 || th->root.type == bfd_link_hash_warning)
6999 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7000
7001 tls_mask
7002 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7003 }
7004
7005 /* The mask bits tell us if the call will be
7006 optimised away. */
7007 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7008 && (t_rtype == R_PPC_TLSGD
7009 || t_rtype == R_PPC_GOT_TLSGD16
7010 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7011 continue;
7012 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7013 && (t_rtype == R_PPC_TLSLD
7014 || t_rtype == R_PPC_GOT_TLSLD16
7015 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7016 continue;
7017 }
7018
7019 sym_type = h->type;
7020 }
7021
7022 if (r_type == R_PPC_ADDR16_HA)
7023 {
7024 if (h != NULL
7025 && !h->def_regular
7026 && h->protected_def
7027 && ppc_elf_hash_entry (h)->has_addr16_ha
7028 && ppc_elf_hash_entry (h)->has_addr16_lo)
7029 picfixup_size += 12;
7030 continue;
7031 }
7032
7033 /* The condition here under which we call find_plt_ent must
7034 match that in relocate_section. If we call find_plt_ent here
7035 but not in relocate_section, or vice versa, then the branch
7036 destination used here may be incorrect. */
7037 plist = NULL;
7038 if (h != NULL)
7039 {
7040 /* We know is_branch_reloc (r_type) is true. */
7041 if (h->type == STT_GNU_IFUNC
7042 || r_type == R_PPC_PLTREL24)
7043 plist = &h->plt.plist;
7044 }
7045 else if (sym_type == STT_GNU_IFUNC
7046 && elf_local_got_offsets (abfd) != NULL)
7047 {
7048 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7049 struct plt_entry **local_plt = (struct plt_entry **)
7050 (local_got_offsets + symtab_hdr->sh_info);
7051 plist = local_plt + ELF32_R_SYM (irel->r_info);
7052 }
7053 if (plist != NULL)
7054 {
7055 bfd_vma addend = 0;
7056 struct plt_entry *ent;
7057
7058 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7059 addend = irel->r_addend;
7060 ent = find_plt_ent (plist, got2, addend);
7061 if (ent != NULL)
7062 {
7063 if (htab->plt_type == PLT_NEW
7064 || h == NULL
7065 || !htab->elf.dynamic_sections_created
7066 || h->dynindx == -1)
7067 {
7068 tsec = htab->glink;
7069 toff = ent->glink_offset;
7070 }
7071 else
7072 {
7073 tsec = htab->elf.splt;
7074 toff = ent->plt.offset;
7075 }
7076 }
7077 }
7078
7079 /* If the branch and target are in the same section, you have
7080 no hope of adding stubs. We'll error out later should the
7081 branch overflow. */
7082 if (tsec == isec)
7083 continue;
7084
7085 /* There probably isn't any reason to handle symbols in
7086 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7087 attribute for a code section, and we are only looking at
7088 branches. However, implement it correctly here as a
7089 reference for other target relax_section functions. */
7090 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7091 {
7092 /* At this stage in linking, no SEC_MERGE symbol has been
7093 adjusted, so all references to such symbols need to be
7094 passed through _bfd_merged_section_offset. (Later, in
7095 relocate_section, all SEC_MERGE symbols *except* for
7096 section symbols have been adjusted.)
7097
7098 gas may reduce relocations against symbols in SEC_MERGE
7099 sections to a relocation against the section symbol when
7100 the original addend was zero. When the reloc is against
7101 a section symbol we should include the addend in the
7102 offset passed to _bfd_merged_section_offset, since the
7103 location of interest is the original symbol. On the
7104 other hand, an access to "sym+addend" where "sym" is not
7105 a section symbol should not include the addend; Such an
7106 access is presumed to be an offset from "sym"; The
7107 location of interest is just "sym". */
7108 if (sym_type == STT_SECTION)
7109 toff += irel->r_addend;
7110
7111 toff
7112 = _bfd_merged_section_offset (abfd, &tsec,
7113 elf_section_data (tsec)->sec_info,
7114 toff);
7115
7116 if (sym_type != STT_SECTION)
7117 toff += irel->r_addend;
7118 }
7119 /* PLTREL24 addends are special. */
7120 else if (r_type != R_PPC_PLTREL24)
7121 toff += irel->r_addend;
7122
7123 /* Attempted -shared link of non-pic code loses. */
7124 if ((!bfd_link_relocatable (link_info)
7125 && tsec == bfd_und_section_ptr)
7126 || tsec->output_section == NULL
7127 || (tsec->owner != NULL
7128 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7129 continue;
7130
7131 roff = irel->r_offset;
7132
7133 /* If the branch is in range, no need to do anything. */
7134 if (tsec != bfd_und_section_ptr
7135 && (!bfd_link_relocatable (link_info)
7136 /* A relocatable link may have sections moved during
7137 final link, so do not presume they remain in range. */
7138 || tsec->output_section == isec->output_section))
7139 {
7140 bfd_vma symaddr, reladdr;
7141
7142 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7143 reladdr = isec->output_section->vma + isec->output_offset + roff;
7144 if (symaddr - reladdr + max_branch_offset
7145 < 2 * max_branch_offset)
7146 continue;
7147 }
7148
7149 /* Look for an existing fixup to this address. */
7150 for (f = branch_fixups; f ; f = f->next)
7151 if (f->tsec == tsec && f->toff == toff)
7152 break;
7153
7154 if (f == NULL)
7155 {
7156 size_t size;
7157 unsigned long stub_rtype;
7158
7159 val = trampoff - roff;
7160 if (val >= max_branch_offset)
7161 /* Oh dear, we can't reach a trampoline. Don't try to add
7162 one. We'll report an error later. */
7163 continue;
7164
7165 if (bfd_link_pic (link_info))
7166 {
7167 size = 4 * ARRAY_SIZE (shared_stub_entry);
7168 insn_offset = 12;
7169 }
7170 else
7171 {
7172 size = 4 * ARRAY_SIZE (stub_entry);
7173 insn_offset = 0;
7174 }
7175 stub_rtype = R_PPC_RELAX;
7176 if (tsec == htab->elf.splt
7177 || tsec == htab->glink)
7178 {
7179 stub_rtype = R_PPC_RELAX_PLT;
7180 if (r_type == R_PPC_PLTREL24)
7181 stub_rtype = R_PPC_RELAX_PLTREL24;
7182 }
7183
7184 /* Hijack the old relocation. Since we need two
7185 relocations for this use a "composite" reloc. */
7186 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7187 stub_rtype);
7188 irel->r_offset = trampoff + insn_offset;
7189 if (r_type == R_PPC_PLTREL24
7190 && stub_rtype != R_PPC_RELAX_PLTREL24)
7191 irel->r_addend = 0;
7192
7193 /* Record the fixup so we don't do it again this section. */
7194 f = bfd_malloc (sizeof (*f));
7195 f->next = branch_fixups;
7196 f->tsec = tsec;
7197 f->toff = toff;
7198 f->trampoff = trampoff;
7199 branch_fixups = f;
7200
7201 trampoff += size;
7202 changes++;
7203 }
7204 else
7205 {
7206 val = f->trampoff - roff;
7207 if (val >= max_branch_offset)
7208 continue;
7209
7210 /* Nop out the reloc, since we're finalizing things here. */
7211 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7212 }
7213
7214 /* Get the section contents. */
7215 if (contents == NULL)
7216 {
7217 /* Get cached copy if it exists. */
7218 if (elf_section_data (isec)->this_hdr.contents != NULL)
7219 contents = elf_section_data (isec)->this_hdr.contents;
7220 /* Go get them off disk. */
7221 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7222 goto error_return;
7223 }
7224
7225 /* Fix up the existing branch to hit the trampoline. */
7226 hit_addr = contents + roff;
7227 switch (r_type)
7228 {
7229 case R_PPC_REL24:
7230 case R_PPC_LOCAL24PC:
7231 case R_PPC_PLTREL24:
7232 t0 = bfd_get_32 (abfd, hit_addr);
7233 t0 &= ~0x3fffffc;
7234 t0 |= val & 0x3fffffc;
7235 bfd_put_32 (abfd, t0, hit_addr);
7236 break;
7237
7238 case R_PPC_REL14:
7239 case R_PPC_REL14_BRTAKEN:
7240 case R_PPC_REL14_BRNTAKEN:
7241 t0 = bfd_get_32 (abfd, hit_addr);
7242 t0 &= ~0xfffc;
7243 t0 |= val & 0xfffc;
7244 bfd_put_32 (abfd, t0, hit_addr);
7245 break;
7246 }
7247 }
7248
7249 while (branch_fixups != NULL)
7250 {
7251 struct one_branch_fixup *f = branch_fixups;
7252 branch_fixups = branch_fixups->next;
7253 free (f);
7254 }
7255 }
7256
7257 workaround_change = FALSE;
7258 newsize = trampoff;
7259 if (htab->params->ppc476_workaround
7260 && (!bfd_link_relocatable (link_info)
7261 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7262 {
7263 bfd_vma addr, end_addr;
7264 unsigned int crossings;
7265 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7266
7267 addr = isec->output_section->vma + isec->output_offset;
7268 end_addr = addr + trampoff;
7269 addr &= -pagesize;
7270 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7271 if (crossings != 0)
7272 {
7273 /* Keep space aligned, to ensure the patch code itself does
7274 not cross a page. Don't decrease size calculated on a
7275 previous pass as otherwise we might never settle on a layout. */
7276 newsize = 15 - ((end_addr - 1) & 15);
7277 newsize += crossings * 16;
7278 if (relax_info->workaround_size < newsize)
7279 {
7280 relax_info->workaround_size = newsize;
7281 workaround_change = TRUE;
7282 }
7283 /* Ensure relocate_section is called. */
7284 isec->flags |= SEC_RELOC;
7285 }
7286 newsize = trampoff + relax_info->workaround_size;
7287 }
7288
7289 if (htab->params->pic_fixup > 0)
7290 {
7291 picfixup_size -= relax_info->picfixup_size;
7292 if (picfixup_size != 0)
7293 relax_info->picfixup_size += picfixup_size;
7294 newsize += relax_info->picfixup_size;
7295 }
7296
7297 if (changes != 0 || picfixup_size != 0 || workaround_change)
7298 isec->size = newsize;
7299
7300 if (isymbuf != NULL
7301 && symtab_hdr->contents != (unsigned char *) isymbuf)
7302 {
7303 if (! link_info->keep_memory)
7304 free (isymbuf);
7305 else
7306 {
7307 /* Cache the symbols for elf_link_input_bfd. */
7308 symtab_hdr->contents = (unsigned char *) isymbuf;
7309 }
7310 }
7311
7312 if (contents != NULL
7313 && elf_section_data (isec)->this_hdr.contents != contents)
7314 {
7315 if (!changes && !link_info->keep_memory)
7316 free (contents);
7317 else
7318 {
7319 /* Cache the section contents for elf_link_input_bfd. */
7320 elf_section_data (isec)->this_hdr.contents = contents;
7321 }
7322 }
7323
7324 changes += picfixup_size;
7325 if (changes != 0)
7326 {
7327 /* Append sufficient NOP relocs so we can write out relocation
7328 information for the trampolines. */
7329 Elf_Internal_Shdr *rel_hdr;
7330 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7331 * sizeof (*new_relocs));
7332 unsigned ix;
7333
7334 if (!new_relocs)
7335 goto error_return;
7336 memcpy (new_relocs, internal_relocs,
7337 isec->reloc_count * sizeof (*new_relocs));
7338 for (ix = changes; ix--;)
7339 {
7340 irel = new_relocs + ix + isec->reloc_count;
7341
7342 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7343 }
7344 if (internal_relocs != elf_section_data (isec)->relocs)
7345 free (internal_relocs);
7346 elf_section_data (isec)->relocs = new_relocs;
7347 isec->reloc_count += changes;
7348 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7349 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7350 }
7351 else if (internal_relocs != NULL
7352 && elf_section_data (isec)->relocs != internal_relocs)
7353 free (internal_relocs);
7354
7355 *again = changes != 0 || workaround_change;
7356 return TRUE;
7357
7358 error_return:
7359 while (branch_fixups != NULL)
7360 {
7361 struct one_branch_fixup *f = branch_fixups;
7362 branch_fixups = branch_fixups->next;
7363 free (f);
7364 }
7365 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7366 free (isymbuf);
7367 if (contents != NULL
7368 && elf_section_data (isec)->this_hdr.contents != contents)
7369 free (contents);
7370 if (internal_relocs != NULL
7371 && elf_section_data (isec)->relocs != internal_relocs)
7372 free (internal_relocs);
7373 return FALSE;
7374 }
7375 \f
7376 /* What to do when ld finds relocations against symbols defined in
7377 discarded sections. */
7378
7379 static unsigned int
7380 ppc_elf_action_discarded (asection *sec)
7381 {
7382 if (strcmp (".fixup", sec->name) == 0)
7383 return 0;
7384
7385 if (strcmp (".got2", sec->name) == 0)
7386 return 0;
7387
7388 return _bfd_elf_default_action_discarded (sec);
7389 }
7390 \f
7391 /* Fill in the address for a pointer generated in a linker section. */
7392
7393 static bfd_vma
7394 elf_finish_pointer_linker_section (bfd *input_bfd,
7395 elf_linker_section_t *lsect,
7396 struct elf_link_hash_entry *h,
7397 bfd_vma relocation,
7398 const Elf_Internal_Rela *rel)
7399 {
7400 elf_linker_section_pointers_t *linker_section_ptr;
7401
7402 BFD_ASSERT (lsect != NULL);
7403
7404 if (h != NULL)
7405 {
7406 /* Handle global symbol. */
7407 struct ppc_elf_link_hash_entry *eh;
7408
7409 eh = (struct ppc_elf_link_hash_entry *) h;
7410 BFD_ASSERT (eh->elf.def_regular);
7411 linker_section_ptr = eh->linker_section_pointer;
7412 }
7413 else
7414 {
7415 /* Handle local symbol. */
7416 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7417
7418 BFD_ASSERT (is_ppc_elf (input_bfd));
7419 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7420 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7421 }
7422
7423 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7424 rel->r_addend,
7425 lsect);
7426 BFD_ASSERT (linker_section_ptr != NULL);
7427
7428 /* Offset will always be a multiple of four, so use the bottom bit
7429 as a "written" flag. */
7430 if ((linker_section_ptr->offset & 1) == 0)
7431 {
7432 bfd_put_32 (lsect->section->owner,
7433 relocation + linker_section_ptr->addend,
7434 lsect->section->contents + linker_section_ptr->offset);
7435 linker_section_ptr->offset += 1;
7436 }
7437
7438 relocation = (lsect->section->output_section->vma
7439 + lsect->section->output_offset
7440 + linker_section_ptr->offset - 1
7441 - SYM_VAL (lsect->sym));
7442
7443 #ifdef DEBUG
7444 fprintf (stderr,
7445 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7446 lsect->name, (long) relocation, (long) relocation);
7447 #endif
7448
7449 return relocation;
7450 }
7451
7452 #define PPC_LO(v) ((v) & 0xffff)
7453 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7454 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7455
7456 static void
7457 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7458 struct bfd_link_info *info)
7459 {
7460 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7461 bfd *output_bfd = info->output_bfd;
7462 bfd_vma plt;
7463
7464 plt = ((ent->plt.offset & ~1)
7465 + plt_sec->output_section->vma
7466 + plt_sec->output_offset);
7467
7468 if (bfd_link_pic (info))
7469 {
7470 bfd_vma got = 0;
7471
7472 if (ent->addend >= 32768)
7473 got = (ent->addend
7474 + ent->sec->output_section->vma
7475 + ent->sec->output_offset);
7476 else if (htab->elf.hgot != NULL)
7477 got = SYM_VAL (htab->elf.hgot);
7478
7479 plt -= got;
7480
7481 if (plt + 0x8000 < 0x10000)
7482 {
7483 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7484 p += 4;
7485 bfd_put_32 (output_bfd, MTCTR_11, p);
7486 p += 4;
7487 bfd_put_32 (output_bfd, BCTR, p);
7488 p += 4;
7489 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7490 p += 4;
7491 }
7492 else
7493 {
7494 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7495 p += 4;
7496 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7497 p += 4;
7498 bfd_put_32 (output_bfd, MTCTR_11, p);
7499 p += 4;
7500 bfd_put_32 (output_bfd, BCTR, p);
7501 p += 4;
7502 }
7503 }
7504 else
7505 {
7506 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7507 p += 4;
7508 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7509 p += 4;
7510 bfd_put_32 (output_bfd, MTCTR_11, p);
7511 p += 4;
7512 bfd_put_32 (output_bfd, BCTR, p);
7513 p += 4;
7514 }
7515 }
7516
7517 /* Return true if symbol is defined statically. */
7518
7519 static bfd_boolean
7520 is_static_defined (struct elf_link_hash_entry *h)
7521 {
7522 return ((h->root.type == bfd_link_hash_defined
7523 || h->root.type == bfd_link_hash_defweak)
7524 && h->root.u.def.section != NULL
7525 && h->root.u.def.section->output_section != NULL);
7526 }
7527
7528 /* If INSN is an opcode that may be used with an @tls operand, return
7529 the transformed insn for TLS optimisation, otherwise return 0. If
7530 REG is non-zero only match an insn with RB or RA equal to REG. */
7531
7532 unsigned int
7533 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7534 {
7535 unsigned int rtra;
7536
7537 if ((insn & (0x3f << 26)) != 31 << 26)
7538 return 0;
7539
7540 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7541 rtra = insn & ((1 << 26) - (1 << 16));
7542 else if (((insn >> 16) & 0x1f) == reg)
7543 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7544 else
7545 return 0;
7546
7547 if ((insn & (0x3ff << 1)) == 266 << 1)
7548 /* add -> addi. */
7549 insn = 14 << 26;
7550 else if ((insn & (0x1f << 1)) == 23 << 1
7551 && ((insn & (0x1f << 6)) < 14 << 6
7552 || ((insn & (0x1f << 6)) >= 16 << 6
7553 && (insn & (0x1f << 6)) < 24 << 6)))
7554 /* load and store indexed -> dform. */
7555 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7556 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7557 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7558 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7559 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7560 /* lwax -> lwa. */
7561 insn = (58 << 26) | 2;
7562 else
7563 return 0;
7564 insn |= rtra;
7565 return insn;
7566 }
7567
7568 /* If INSN is an opcode that may be used with an @tprel operand, return
7569 the transformed insn for an undefined weak symbol, ie. with the
7570 thread pointer REG operand removed. Otherwise return 0. */
7571
7572 unsigned int
7573 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7574 {
7575 if ((insn & (0x1f << 16)) == reg << 16
7576 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7577 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7578 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7579 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7580 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7581 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7582 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7583 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7584 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7585 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7586 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7587 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7588 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7589 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7590 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7591 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7592 && (insn & 3) != 1)
7593 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7594 && ((insn & 3) == 0 || (insn & 3) == 3))))
7595 {
7596 insn &= ~(0x1f << 16);
7597 }
7598 else if ((insn & (0x1f << 21)) == reg << 21
7599 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7600 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7601 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7602 {
7603 insn &= ~(0x1f << 21);
7604 insn |= (insn & (0x1f << 16)) << 5;
7605 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7606 insn -= 2 >> 26; /* convert to ori,oris */
7607 }
7608 else
7609 insn = 0;
7610 return insn;
7611 }
7612
7613 static bfd_boolean
7614 is_insn_ds_form (unsigned int insn)
7615 {
7616 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7617 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7618 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7619 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7620 }
7621
7622 static bfd_boolean
7623 is_insn_dq_form (unsigned int insn)
7624 {
7625 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7626 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7627 && (insn & 3) == 1));
7628 }
7629
7630 /* The RELOCATE_SECTION function is called by the ELF backend linker
7631 to handle the relocations for a section.
7632
7633 The relocs are always passed as Rela structures; if the section
7634 actually uses Rel structures, the r_addend field will always be
7635 zero.
7636
7637 This function is responsible for adjust the section contents as
7638 necessary, and (if using Rela relocs and generating a
7639 relocatable output file) adjusting the reloc addend as
7640 necessary.
7641
7642 This function does not have to worry about setting the reloc
7643 address or the reloc symbol index.
7644
7645 LOCAL_SYMS is a pointer to the swapped in local symbols.
7646
7647 LOCAL_SECTIONS is an array giving the section in the input file
7648 corresponding to the st_shndx field of each local symbol.
7649
7650 The global hash table entry for the global symbols can be found
7651 via elf_sym_hashes (input_bfd).
7652
7653 When generating relocatable output, this function must handle
7654 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7655 going to be the section symbol corresponding to the output
7656 section, which means that the addend must be adjusted
7657 accordingly. */
7658
7659 static bfd_boolean
7660 ppc_elf_relocate_section (bfd *output_bfd,
7661 struct bfd_link_info *info,
7662 bfd *input_bfd,
7663 asection *input_section,
7664 bfd_byte *contents,
7665 Elf_Internal_Rela *relocs,
7666 Elf_Internal_Sym *local_syms,
7667 asection **local_sections)
7668 {
7669 Elf_Internal_Shdr *symtab_hdr;
7670 struct elf_link_hash_entry **sym_hashes;
7671 struct ppc_elf_link_hash_table *htab;
7672 Elf_Internal_Rela *rel;
7673 Elf_Internal_Rela *wrel;
7674 Elf_Internal_Rela *relend;
7675 Elf_Internal_Rela outrel;
7676 asection *got2;
7677 bfd_vma *local_got_offsets;
7678 bfd_boolean ret = TRUE;
7679 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7680 bfd_boolean is_vxworks_tls;
7681 unsigned int picfixup_size = 0;
7682 struct ppc_elf_relax_info *relax_info = NULL;
7683
7684 #ifdef DEBUG
7685 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7686 "%ld relocations%s",
7687 input_bfd, input_section,
7688 (long) input_section->reloc_count,
7689 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7690 #endif
7691
7692 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7693
7694 /* Initialize howto table if not already done. */
7695 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7696 ppc_elf_howto_init ();
7697
7698 htab = ppc_elf_hash_table (info);
7699 local_got_offsets = elf_local_got_offsets (input_bfd);
7700 symtab_hdr = &elf_symtab_hdr (input_bfd);
7701 sym_hashes = elf_sym_hashes (input_bfd);
7702 /* We have to handle relocations in vxworks .tls_vars sections
7703 specially, because the dynamic loader is 'weird'. */
7704 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7705 && !strcmp (input_section->output_section->name,
7706 ".tls_vars"));
7707 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7708 relax_info = elf_section_data (input_section)->sec_info;
7709 rel = wrel = relocs;
7710 relend = relocs + input_section->reloc_count;
7711 for (; rel < relend; wrel++, rel++)
7712 {
7713 enum elf_ppc_reloc_type r_type;
7714 bfd_vma addend;
7715 bfd_reloc_status_type r;
7716 Elf_Internal_Sym *sym;
7717 asection *sec;
7718 struct elf_link_hash_entry *h;
7719 const char *sym_name;
7720 reloc_howto_type *howto;
7721 unsigned long r_symndx;
7722 bfd_vma relocation;
7723 bfd_vma branch_bit, from;
7724 bfd_boolean unresolved_reloc;
7725 bfd_boolean warned;
7726 unsigned int tls_type, tls_mask, tls_gd;
7727 struct plt_entry **ifunc;
7728 struct reloc_howto_struct alt_howto;
7729
7730 again:
7731 r_type = ELF32_R_TYPE (rel->r_info);
7732 sym = NULL;
7733 sec = NULL;
7734 h = NULL;
7735 unresolved_reloc = FALSE;
7736 warned = FALSE;
7737 r_symndx = ELF32_R_SYM (rel->r_info);
7738
7739 if (r_symndx < symtab_hdr->sh_info)
7740 {
7741 sym = local_syms + r_symndx;
7742 sec = local_sections[r_symndx];
7743 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7744
7745 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7746 }
7747 else
7748 {
7749 bfd_boolean ignored;
7750
7751 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7752 r_symndx, symtab_hdr, sym_hashes,
7753 h, sec, relocation,
7754 unresolved_reloc, warned, ignored);
7755
7756 sym_name = h->root.root.string;
7757 }
7758
7759 if (sec != NULL && discarded_section (sec))
7760 {
7761 /* For relocs against symbols from removed linkonce sections,
7762 or sections discarded by a linker script, we just want the
7763 section contents zeroed. Avoid any special processing. */
7764 howto = NULL;
7765 if (r_type < R_PPC_max)
7766 howto = ppc_elf_howto_table[r_type];
7767
7768 _bfd_clear_contents (howto, input_bfd, input_section,
7769 contents + rel->r_offset);
7770 wrel->r_offset = rel->r_offset;
7771 wrel->r_info = 0;
7772 wrel->r_addend = 0;
7773
7774 /* For ld -r, remove relocations in debug sections against
7775 symbols defined in discarded sections. Not done for
7776 non-debug to preserve relocs in .eh_frame which the
7777 eh_frame editing code expects to be present. */
7778 if (bfd_link_relocatable (info)
7779 && (input_section->flags & SEC_DEBUGGING))
7780 wrel--;
7781
7782 continue;
7783 }
7784
7785 if (bfd_link_relocatable (info))
7786 {
7787 if (got2 != NULL
7788 && r_type == R_PPC_PLTREL24
7789 && rel->r_addend != 0)
7790 {
7791 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7792 addend specifies the GOT pointer offset within .got2. */
7793 rel->r_addend += got2->output_offset;
7794 }
7795 if (r_type != R_PPC_RELAX_PLT
7796 && r_type != R_PPC_RELAX_PLTREL24
7797 && r_type != R_PPC_RELAX)
7798 goto copy_reloc;
7799 }
7800
7801 /* TLS optimizations. Replace instruction sequences and relocs
7802 based on information we collected in tls_optimize. We edit
7803 RELOCS so that --emit-relocs will output something sensible
7804 for the final instruction stream. */
7805 tls_mask = 0;
7806 tls_gd = 0;
7807 if (h != NULL)
7808 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7809 else if (local_got_offsets != NULL)
7810 {
7811 struct plt_entry **local_plt;
7812 char *lgot_masks;
7813 local_plt
7814 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7815 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7816 tls_mask = lgot_masks[r_symndx];
7817 }
7818
7819 /* Ensure reloc mapping code below stays sane. */
7820 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7821 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7822 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7823 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7824 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7825 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7826 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7827 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7828 abort ();
7829 switch (r_type)
7830 {
7831 default:
7832 break;
7833
7834 case R_PPC_GOT_TPREL16:
7835 case R_PPC_GOT_TPREL16_LO:
7836 if ((tls_mask & TLS_TLS) != 0
7837 && (tls_mask & TLS_TPREL) == 0)
7838 {
7839 bfd_vma insn;
7840
7841 insn = bfd_get_32 (input_bfd,
7842 contents + rel->r_offset - d_offset);
7843 insn &= 31 << 21;
7844 insn |= 0x3c020000; /* addis 0,2,0 */
7845 bfd_put_32 (input_bfd, insn,
7846 contents + rel->r_offset - d_offset);
7847 r_type = R_PPC_TPREL16_HA;
7848 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7849 }
7850 break;
7851
7852 case R_PPC_TLS:
7853 if ((tls_mask & TLS_TLS) != 0
7854 && (tls_mask & TLS_TPREL) == 0)
7855 {
7856 bfd_vma insn;
7857
7858 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7859 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7860 if (insn == 0)
7861 abort ();
7862 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7863 r_type = R_PPC_TPREL16_LO;
7864 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7865
7866 /* Was PPC_TLS which sits on insn boundary, now
7867 PPC_TPREL16_LO which is at low-order half-word. */
7868 rel->r_offset += d_offset;
7869 }
7870 break;
7871
7872 case R_PPC_GOT_TLSGD16_HI:
7873 case R_PPC_GOT_TLSGD16_HA:
7874 tls_gd = TLS_TPRELGD;
7875 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7876 goto tls_gdld_hi;
7877 break;
7878
7879 case R_PPC_GOT_TLSLD16_HI:
7880 case R_PPC_GOT_TLSLD16_HA:
7881 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7882 {
7883 tls_gdld_hi:
7884 if ((tls_mask & tls_gd) != 0)
7885 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7886 + R_PPC_GOT_TPREL16);
7887 else
7888 {
7889 rel->r_offset -= d_offset;
7890 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
7891 r_type = R_PPC_NONE;
7892 }
7893 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7894 }
7895 break;
7896
7897 case R_PPC_GOT_TLSGD16:
7898 case R_PPC_GOT_TLSGD16_LO:
7899 tls_gd = TLS_TPRELGD;
7900 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7901 goto tls_ldgd_opt;
7902 break;
7903
7904 case R_PPC_GOT_TLSLD16:
7905 case R_PPC_GOT_TLSLD16_LO:
7906 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7907 {
7908 unsigned int insn1, insn2;
7909 bfd_vma offset;
7910
7911 tls_ldgd_opt:
7912 offset = (bfd_vma) -1;
7913 /* If not using the newer R_PPC_TLSGD/LD to mark
7914 __tls_get_addr calls, we must trust that the call
7915 stays with its arg setup insns, ie. that the next
7916 reloc is the __tls_get_addr call associated with
7917 the current reloc. Edit both insns. */
7918 if (input_section->has_tls_get_addr_call
7919 && rel + 1 < relend
7920 && branch_reloc_hash_match (input_bfd, rel + 1,
7921 htab->tls_get_addr))
7922 offset = rel[1].r_offset;
7923 /* We read the low GOT_TLS insn because we need to keep
7924 the destination reg. It may be something other than
7925 the usual r3, and moved to r3 before the call by
7926 intervening code. */
7927 insn1 = bfd_get_32 (input_bfd,
7928 contents + rel->r_offset - d_offset);
7929 if ((tls_mask & tls_gd) != 0)
7930 {
7931 /* IE */
7932 insn1 &= (0x1f << 21) | (0x1f << 16);
7933 insn1 |= 32 << 26; /* lwz */
7934 if (offset != (bfd_vma) -1)
7935 {
7936 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7937 insn2 = 0x7c631214; /* add 3,3,2 */
7938 bfd_put_32 (input_bfd, insn2, contents + offset);
7939 }
7940 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7941 + R_PPC_GOT_TPREL16);
7942 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7943 }
7944 else
7945 {
7946 /* LE */
7947 insn1 &= 0x1f << 21;
7948 insn1 |= 0x3c020000; /* addis r,2,0 */
7949 if (tls_gd == 0)
7950 {
7951 /* Was an LD reloc. */
7952 for (r_symndx = 0;
7953 r_symndx < symtab_hdr->sh_info;
7954 r_symndx++)
7955 if (local_sections[r_symndx] == sec)
7956 break;
7957 if (r_symndx >= symtab_hdr->sh_info)
7958 r_symndx = STN_UNDEF;
7959 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7960 if (r_symndx != STN_UNDEF)
7961 rel->r_addend -= (local_syms[r_symndx].st_value
7962 + sec->output_offset
7963 + sec->output_section->vma);
7964 }
7965 r_type = R_PPC_TPREL16_HA;
7966 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7967 if (offset != (bfd_vma) -1)
7968 {
7969 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7970 rel[1].r_offset = offset + d_offset;
7971 rel[1].r_addend = rel->r_addend;
7972 insn2 = 0x38630000; /* addi 3,3,0 */
7973 bfd_put_32 (input_bfd, insn2, contents + offset);
7974 }
7975 }
7976 bfd_put_32 (input_bfd, insn1,
7977 contents + rel->r_offset - d_offset);
7978 if (tls_gd == 0)
7979 {
7980 /* We changed the symbol on an LD reloc. Start over
7981 in order to get h, sym, sec etc. right. */
7982 goto again;
7983 }
7984 }
7985 break;
7986
7987 case R_PPC_TLSGD:
7988 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7989 {
7990 unsigned int insn2;
7991 bfd_vma offset = rel->r_offset;
7992
7993 if ((tls_mask & TLS_TPRELGD) != 0)
7994 {
7995 /* IE */
7996 r_type = R_PPC_NONE;
7997 insn2 = 0x7c631214; /* add 3,3,2 */
7998 }
7999 else
8000 {
8001 /* LE */
8002 r_type = R_PPC_TPREL16_LO;
8003 rel->r_offset += d_offset;
8004 insn2 = 0x38630000; /* addi 3,3,0 */
8005 }
8006 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8007 bfd_put_32 (input_bfd, insn2, contents + offset);
8008 /* Zap the reloc on the _tls_get_addr call too. */
8009 BFD_ASSERT (offset == rel[1].r_offset);
8010 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8011 }
8012 break;
8013
8014 case R_PPC_TLSLD:
8015 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8016 {
8017 unsigned int insn2;
8018
8019 for (r_symndx = 0;
8020 r_symndx < symtab_hdr->sh_info;
8021 r_symndx++)
8022 if (local_sections[r_symndx] == sec)
8023 break;
8024 if (r_symndx >= symtab_hdr->sh_info)
8025 r_symndx = STN_UNDEF;
8026 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8027 if (r_symndx != STN_UNDEF)
8028 rel->r_addend -= (local_syms[r_symndx].st_value
8029 + sec->output_offset
8030 + sec->output_section->vma);
8031
8032 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8033 rel->r_offset += d_offset;
8034 insn2 = 0x38630000; /* addi 3,3,0 */
8035 bfd_put_32 (input_bfd, insn2,
8036 contents + rel->r_offset - d_offset);
8037 /* Zap the reloc on the _tls_get_addr call too. */
8038 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8039 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8040 goto again;
8041 }
8042 break;
8043 }
8044
8045 /* Handle other relocations that tweak non-addend part of insn. */
8046 branch_bit = 0;
8047 switch (r_type)
8048 {
8049 default:
8050 break;
8051
8052 /* Branch taken prediction relocations. */
8053 case R_PPC_ADDR14_BRTAKEN:
8054 case R_PPC_REL14_BRTAKEN:
8055 branch_bit = BRANCH_PREDICT_BIT;
8056 /* Fall through. */
8057
8058 /* Branch not taken prediction relocations. */
8059 case R_PPC_ADDR14_BRNTAKEN:
8060 case R_PPC_REL14_BRNTAKEN:
8061 {
8062 bfd_vma insn;
8063
8064 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8065 insn &= ~BRANCH_PREDICT_BIT;
8066 insn |= branch_bit;
8067
8068 from = (rel->r_offset
8069 + input_section->output_offset
8070 + input_section->output_section->vma);
8071
8072 /* Invert 'y' bit if not the default. */
8073 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8074 insn ^= BRANCH_PREDICT_BIT;
8075
8076 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8077 break;
8078 }
8079 }
8080
8081 if (ELIMINATE_COPY_RELOCS
8082 && h != NULL
8083 && !h->def_regular
8084 && h->protected_def
8085 && ppc_elf_hash_entry (h)->has_addr16_ha
8086 && ppc_elf_hash_entry (h)->has_addr16_lo
8087 && htab->params->pic_fixup > 0)
8088 {
8089 /* Convert lis;addi or lis;load/store accessing a protected
8090 variable defined in a shared library to PIC. */
8091 unsigned int insn;
8092
8093 if (r_type == R_PPC_ADDR16_HA)
8094 {
8095 insn = bfd_get_32 (input_bfd,
8096 contents + rel->r_offset - d_offset);
8097 if ((insn & (0x3f << 26)) == (15u << 26)
8098 && (insn & (0x1f << 16)) == 0 /* lis */)
8099 {
8100 bfd_byte *p;
8101 bfd_vma off;
8102 bfd_vma got_addr;
8103
8104 p = (contents + input_section->size
8105 - relax_info->workaround_size
8106 - relax_info->picfixup_size
8107 + picfixup_size);
8108 off = (p - contents) - (rel->r_offset - d_offset);
8109 if (off > 0x1fffffc || (off & 3) != 0)
8110 info->callbacks->einfo
8111 (_("%H: fixup branch overflow\n"),
8112 input_bfd, input_section, rel->r_offset);
8113
8114 bfd_put_32 (input_bfd, B | off,
8115 contents + rel->r_offset - d_offset);
8116 got_addr = (htab->elf.sgot->output_section->vma
8117 + htab->elf.sgot->output_offset
8118 + (h->got.offset & ~1));
8119 wrel->r_offset = (p - contents) + d_offset;
8120 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8121 wrel->r_addend = got_addr;
8122 insn &= ~0xffff;
8123 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8124 bfd_put_32 (input_bfd, insn, p);
8125
8126 /* Convert lis to lwz, loading address from GOT. */
8127 insn &= ~0xffff;
8128 insn ^= (32u ^ 15u) << 26;
8129 insn |= (insn & (0x1f << 21)) >> 5;
8130 insn |= got_addr & 0xffff;
8131 bfd_put_32 (input_bfd, insn, p + 4);
8132
8133 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8134 picfixup_size += 12;
8135
8136 /* Use one of the spare relocs, so --emit-relocs
8137 output is reasonable. */
8138 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8139 wrel++, rel++;
8140 rel->r_offset = wrel[-1].r_offset + 4;
8141 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8142 rel->r_addend = wrel[-1].r_addend;
8143
8144 /* Continue on as if we had a got reloc, to output
8145 dynamic reloc. */
8146 r_type = R_PPC_GOT16_LO;
8147 }
8148 else
8149 _bfd_error_handler
8150 /* xgettext:c-format */
8151 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8152 input_bfd, input_section, rel->r_offset,
8153 "R_PPC_ADDR16_HA", insn);
8154 }
8155 else if (r_type == R_PPC_ADDR16_LO)
8156 {
8157 insn = bfd_get_32 (input_bfd,
8158 contents + rel->r_offset - d_offset);
8159 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8160 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8161 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8162 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8163 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8164 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8165 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8166 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8167 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8168 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8169 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8170 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8171 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8172 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8173 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8174 && (insn & 3) != 1)
8175 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8176 && ((insn & 3) == 0 || (insn & 3) == 3)))
8177 {
8178 /* Arrange to apply the reloc addend, if any. */
8179 relocation = 0;
8180 unresolved_reloc = FALSE;
8181 rel->r_info = ELF32_R_INFO (0, r_type);
8182 }
8183 else
8184 _bfd_error_handler
8185 /* xgettext:c-format */
8186 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8187 input_bfd, input_section, rel->r_offset,
8188 "R_PPC_ADDR16_LO", insn);
8189 }
8190 }
8191
8192 ifunc = NULL;
8193 if (!htab->is_vxworks)
8194 {
8195 struct plt_entry *ent;
8196
8197 if (h != NULL)
8198 {
8199 if (h->type == STT_GNU_IFUNC)
8200 ifunc = &h->plt.plist;
8201 }
8202 else if (local_got_offsets != NULL
8203 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8204 {
8205 struct plt_entry **local_plt;
8206
8207 local_plt = (struct plt_entry **) (local_got_offsets
8208 + symtab_hdr->sh_info);
8209 ifunc = local_plt + r_symndx;
8210 }
8211
8212 ent = NULL;
8213 if (ifunc != NULL
8214 && (!bfd_link_pic (info)
8215 || is_branch_reloc (r_type)))
8216 {
8217 addend = 0;
8218 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8219 addend = rel->r_addend;
8220 ent = find_plt_ent (ifunc, got2, addend);
8221 }
8222 if (ent != NULL)
8223 {
8224 if (bfd_link_pic (info)
8225 && ent->sec != got2
8226 && htab->plt_type != PLT_NEW
8227 && (!htab->elf.dynamic_sections_created
8228 || h == NULL
8229 || h->dynindx == -1))
8230 {
8231 /* Uh oh, we are going to create a pic glink stub
8232 for an ifunc (here for h == NULL and later in
8233 finish_dynamic_symbol for h != NULL), and
8234 apparently are using code compiled with
8235 -mbss-plt. The difficulty is that -mbss-plt code
8236 gives no indication via a magic PLTREL24 addend
8237 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8238 is pointing into a .got2 section (and how far
8239 into .got2). */
8240 info->callbacks->einfo
8241 /* xgettext:c-format */
8242 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8243 input_bfd, input_section, rel->r_offset, sym_name);
8244 }
8245 if (h == NULL && (ent->plt.offset & 1) == 0)
8246 {
8247 Elf_Internal_Rela rela;
8248 bfd_byte *loc;
8249
8250 rela.r_offset = (htab->elf.iplt->output_section->vma
8251 + htab->elf.iplt->output_offset
8252 + ent->plt.offset);
8253 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8254 rela.r_addend = relocation;
8255 loc = htab->elf.irelplt->contents;
8256 loc += (htab->elf.irelplt->reloc_count++
8257 * sizeof (Elf32_External_Rela));
8258 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8259 htab->local_ifunc_resolver = 1;
8260
8261 ent->plt.offset |= 1;
8262 }
8263 if (h == NULL && (ent->glink_offset & 1) == 0)
8264 {
8265 unsigned char *p = ((unsigned char *) htab->glink->contents
8266 + ent->glink_offset);
8267 write_glink_stub (ent, htab->elf.iplt, p, info);
8268 ent->glink_offset |= 1;
8269 }
8270
8271 unresolved_reloc = FALSE;
8272 if (htab->plt_type == PLT_NEW
8273 || !htab->elf.dynamic_sections_created
8274 || h == NULL
8275 || h->dynindx == -1)
8276 relocation = (htab->glink->output_section->vma
8277 + htab->glink->output_offset
8278 + (ent->glink_offset & ~1));
8279 else
8280 relocation = (htab->elf.splt->output_section->vma
8281 + htab->elf.splt->output_offset
8282 + ent->plt.offset);
8283 }
8284 }
8285
8286 addend = rel->r_addend;
8287 howto = NULL;
8288 if (r_type < R_PPC_max)
8289 howto = ppc_elf_howto_table[r_type];
8290
8291 switch (r_type)
8292 {
8293 default:
8294 break;
8295
8296 case R_PPC_TPREL16_HA:
8297 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8298 {
8299 bfd_byte *p = contents + (rel->r_offset & ~3);
8300 unsigned int insn = bfd_get_32 (input_bfd, p);
8301 if ((insn & ((0x3f << 26) | 0x1f << 16))
8302 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8303 /* xgettext:c-format */
8304 info->callbacks->minfo
8305 (_("%H: warning: %s unexpected insn %#x.\n"),
8306 input_bfd, input_section, rel->r_offset, howto->name, insn);
8307 else
8308 bfd_put_32 (input_bfd, NOP, p);
8309 }
8310 break;
8311
8312 case R_PPC_TPREL16_LO:
8313 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8314 {
8315 bfd_byte *p = contents + (rel->r_offset & ~3);
8316 unsigned int insn = bfd_get_32 (input_bfd, p);
8317 insn &= ~(0x1f << 16);
8318 insn |= 2 << 16;
8319 bfd_put_32 (input_bfd, insn, p);
8320 }
8321 break;
8322 }
8323
8324 tls_type = 0;
8325 switch (r_type)
8326 {
8327 default:
8328 info->callbacks->einfo
8329 /* xgettext:c-format */
8330 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8331 input_bfd, (int) r_type, sym_name);
8332
8333 bfd_set_error (bfd_error_bad_value);
8334 ret = FALSE;
8335 goto copy_reloc;
8336
8337 case R_PPC_NONE:
8338 case R_PPC_TLS:
8339 case R_PPC_TLSGD:
8340 case R_PPC_TLSLD:
8341 case R_PPC_EMB_MRKREF:
8342 case R_PPC_GNU_VTINHERIT:
8343 case R_PPC_GNU_VTENTRY:
8344 goto copy_reloc;
8345
8346 /* GOT16 relocations. Like an ADDR16 using the symbol's
8347 address in the GOT as relocation value instead of the
8348 symbol's value itself. Also, create a GOT entry for the
8349 symbol and put the symbol value there. */
8350 case R_PPC_GOT_TLSGD16:
8351 case R_PPC_GOT_TLSGD16_LO:
8352 case R_PPC_GOT_TLSGD16_HI:
8353 case R_PPC_GOT_TLSGD16_HA:
8354 tls_type = TLS_TLS | TLS_GD;
8355 goto dogot;
8356
8357 case R_PPC_GOT_TLSLD16:
8358 case R_PPC_GOT_TLSLD16_LO:
8359 case R_PPC_GOT_TLSLD16_HI:
8360 case R_PPC_GOT_TLSLD16_HA:
8361 tls_type = TLS_TLS | TLS_LD;
8362 goto dogot;
8363
8364 case R_PPC_GOT_TPREL16:
8365 case R_PPC_GOT_TPREL16_LO:
8366 case R_PPC_GOT_TPREL16_HI:
8367 case R_PPC_GOT_TPREL16_HA:
8368 tls_type = TLS_TLS | TLS_TPREL;
8369 goto dogot;
8370
8371 case R_PPC_GOT_DTPREL16:
8372 case R_PPC_GOT_DTPREL16_LO:
8373 case R_PPC_GOT_DTPREL16_HI:
8374 case R_PPC_GOT_DTPREL16_HA:
8375 tls_type = TLS_TLS | TLS_DTPREL;
8376 goto dogot;
8377
8378 case R_PPC_GOT16:
8379 case R_PPC_GOT16_LO:
8380 case R_PPC_GOT16_HI:
8381 case R_PPC_GOT16_HA:
8382 tls_mask = 0;
8383 dogot:
8384 {
8385 /* Relocation is to the entry for this symbol in the global
8386 offset table. */
8387 bfd_vma off;
8388 bfd_vma *offp;
8389 unsigned long indx;
8390
8391 if (htab->elf.sgot == NULL)
8392 abort ();
8393
8394 indx = 0;
8395 if (tls_type == (TLS_TLS | TLS_LD)
8396 && (h == NULL
8397 || !h->def_dynamic))
8398 offp = &htab->tlsld_got.offset;
8399 else if (h != NULL)
8400 {
8401 if (!htab->elf.dynamic_sections_created
8402 || h->dynindx == -1
8403 || SYMBOL_REFERENCES_LOCAL (info, h)
8404 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8405 /* This is actually a static link, or it is a
8406 -Bsymbolic link and the symbol is defined
8407 locally, or the symbol was forced to be local
8408 because of a version file. */
8409 ;
8410 else
8411 {
8412 indx = h->dynindx;
8413 unresolved_reloc = FALSE;
8414 }
8415 offp = &h->got.offset;
8416 }
8417 else
8418 {
8419 if (local_got_offsets == NULL)
8420 abort ();
8421 offp = &local_got_offsets[r_symndx];
8422 }
8423
8424 /* The offset must always be a multiple of 4. We use the
8425 least significant bit to record whether we have already
8426 processed this entry. */
8427 off = *offp;
8428 if ((off & 1) != 0)
8429 off &= ~1;
8430 else
8431 {
8432 unsigned int tls_m = (tls_mask
8433 & (TLS_LD | TLS_GD | TLS_DTPREL
8434 | TLS_TPREL | TLS_TPRELGD));
8435
8436 if (offp == &htab->tlsld_got.offset)
8437 tls_m = TLS_LD;
8438 else if (h == NULL
8439 || !h->def_dynamic)
8440 tls_m &= ~TLS_LD;
8441
8442 /* We might have multiple got entries for this sym.
8443 Initialize them all. */
8444 do
8445 {
8446 int tls_ty = 0;
8447
8448 if ((tls_m & TLS_LD) != 0)
8449 {
8450 tls_ty = TLS_TLS | TLS_LD;
8451 tls_m &= ~TLS_LD;
8452 }
8453 else if ((tls_m & TLS_GD) != 0)
8454 {
8455 tls_ty = TLS_TLS | TLS_GD;
8456 tls_m &= ~TLS_GD;
8457 }
8458 else if ((tls_m & TLS_DTPREL) != 0)
8459 {
8460 tls_ty = TLS_TLS | TLS_DTPREL;
8461 tls_m &= ~TLS_DTPREL;
8462 }
8463 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8464 {
8465 tls_ty = TLS_TLS | TLS_TPREL;
8466 tls_m = 0;
8467 }
8468
8469 /* Generate relocs for the dynamic linker. */
8470 if (indx != 0
8471 || (bfd_link_pic (info)
8472 && (h == NULL
8473 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8474 || offp == &htab->tlsld_got.offset)
8475 && !(tls_ty == (TLS_TLS | TLS_TPREL)
8476 && bfd_link_executable (info)
8477 && SYMBOL_REFERENCES_LOCAL (info, h))))
8478 {
8479 asection *rsec = htab->elf.srelgot;
8480 bfd_byte * loc;
8481
8482 if (ifunc != NULL)
8483 {
8484 rsec = htab->elf.irelplt;
8485 if (indx == 0)
8486 htab->local_ifunc_resolver = 1;
8487 else if (is_static_defined (h))
8488 htab->maybe_local_ifunc_resolver = 1;
8489 }
8490 outrel.r_offset = (htab->elf.sgot->output_section->vma
8491 + htab->elf.sgot->output_offset
8492 + off);
8493 outrel.r_addend = 0;
8494 if (tls_ty & (TLS_LD | TLS_GD))
8495 {
8496 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8497 if (tls_ty == (TLS_TLS | TLS_GD))
8498 {
8499 loc = rsec->contents;
8500 loc += (rsec->reloc_count++
8501 * sizeof (Elf32_External_Rela));
8502 bfd_elf32_swap_reloca_out (output_bfd,
8503 &outrel, loc);
8504 outrel.r_offset += 4;
8505 outrel.r_info
8506 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8507 }
8508 }
8509 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8510 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8511 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8512 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8513 else if (indx != 0)
8514 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8515 else if (ifunc != NULL)
8516 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8517 else
8518 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8519 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8520 {
8521 outrel.r_addend += relocation;
8522 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8523 {
8524 if (htab->elf.tls_sec == NULL)
8525 outrel.r_addend = 0;
8526 else
8527 outrel.r_addend -= htab->elf.tls_sec->vma;
8528 }
8529 }
8530 loc = rsec->contents;
8531 loc += (rsec->reloc_count++
8532 * sizeof (Elf32_External_Rela));
8533 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8534 }
8535
8536 /* Init the .got section contents if we're not
8537 emitting a reloc. */
8538 else
8539 {
8540 bfd_vma value = relocation;
8541
8542 if (tls_ty != 0)
8543 {
8544 if (htab->elf.tls_sec == NULL)
8545 value = 0;
8546 else
8547 {
8548 if (tls_ty & TLS_LD)
8549 value = 0;
8550 else
8551 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8552 if (tls_ty & TLS_TPREL)
8553 value += DTP_OFFSET - TP_OFFSET;
8554 }
8555
8556 if (tls_ty & (TLS_LD | TLS_GD))
8557 {
8558 bfd_put_32 (input_bfd, value,
8559 htab->elf.sgot->contents + off + 4);
8560 value = 1;
8561 }
8562 }
8563 bfd_put_32 (input_bfd, value,
8564 htab->elf.sgot->contents + off);
8565 }
8566
8567 off += 4;
8568 if (tls_ty & (TLS_LD | TLS_GD))
8569 off += 4;
8570 }
8571 while (tls_m != 0);
8572
8573 off = *offp;
8574 *offp = off | 1;
8575 }
8576
8577 if (off >= (bfd_vma) -2)
8578 abort ();
8579
8580 if ((tls_type & TLS_TLS) != 0)
8581 {
8582 if (tls_type != (TLS_TLS | TLS_LD))
8583 {
8584 if ((tls_mask & TLS_LD) != 0
8585 && !(h == NULL
8586 || !h->def_dynamic))
8587 off += 8;
8588 if (tls_type != (TLS_TLS | TLS_GD))
8589 {
8590 if ((tls_mask & TLS_GD) != 0)
8591 off += 8;
8592 if (tls_type != (TLS_TLS | TLS_DTPREL))
8593 {
8594 if ((tls_mask & TLS_DTPREL) != 0)
8595 off += 4;
8596 }
8597 }
8598 }
8599 }
8600
8601 /* If here for a picfixup, we're done. */
8602 if (r_type != ELF32_R_TYPE (rel->r_info))
8603 goto copy_reloc;
8604
8605 relocation = (htab->elf.sgot->output_section->vma
8606 + htab->elf.sgot->output_offset
8607 + off
8608 - SYM_VAL (htab->elf.hgot));
8609
8610 /* Addends on got relocations don't make much sense.
8611 x+off@got is actually x@got+off, and since the got is
8612 generated by a hash table traversal, the value in the
8613 got at entry m+n bears little relation to the entry m. */
8614 if (addend != 0)
8615 info->callbacks->einfo
8616 /* xgettext:c-format */
8617 (_("%H: non-zero addend on %s reloc against `%s'\n"),
8618 input_bfd, input_section, rel->r_offset,
8619 howto->name,
8620 sym_name);
8621 }
8622 break;
8623
8624 /* Relocations that need no special processing. */
8625 case R_PPC_LOCAL24PC:
8626 /* It makes no sense to point a local relocation
8627 at a symbol not in this object. */
8628 if (unresolved_reloc)
8629 {
8630 (*info->callbacks->undefined_symbol) (info,
8631 h->root.root.string,
8632 input_bfd,
8633 input_section,
8634 rel->r_offset,
8635 TRUE);
8636 goto copy_reloc;
8637 }
8638 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8639 {
8640 /* @local on an ifunc does not really make sense since
8641 the ifunc resolver can take you anywhere. More
8642 seriously, calls to ifuncs must go through a plt call
8643 stub, and for pic the plt call stubs uses r30 to
8644 access the PLT. The problem is that a call that is
8645 local won't have the +32k reloc addend trick marking
8646 -fPIC code, so the linker won't know whether r30 is
8647 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8648 /* xgettext:c-format */
8649 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8650 input_bfd, input_section, rel->r_offset,
8651 h->root.root.string);
8652 }
8653 break;
8654
8655 case R_PPC_DTPREL16:
8656 case R_PPC_DTPREL16_LO:
8657 case R_PPC_DTPREL16_HI:
8658 case R_PPC_DTPREL16_HA:
8659 if (htab->elf.tls_sec != NULL)
8660 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8661 break;
8662
8663 /* Relocations that may need to be propagated if this is a shared
8664 object. */
8665 case R_PPC_TPREL16:
8666 case R_PPC_TPREL16_LO:
8667 case R_PPC_TPREL16_HI:
8668 case R_PPC_TPREL16_HA:
8669 if (h != NULL
8670 && h->root.type == bfd_link_hash_undefweak
8671 && h->dynindx == -1)
8672 {
8673 /* Make this relocation against an undefined weak symbol
8674 resolve to zero. This is really just a tweak, since
8675 code using weak externs ought to check that they are
8676 defined before using them. */
8677 bfd_byte *p = contents + rel->r_offset - d_offset;
8678 unsigned int insn = bfd_get_32 (input_bfd, p);
8679 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8680 if (insn != 0)
8681 bfd_put_32 (input_bfd, insn, p);
8682 break;
8683 }
8684 if (htab->elf.tls_sec != NULL)
8685 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8686 /* The TPREL16 relocs shouldn't really be used in shared
8687 libs or with non-local symbols as that will result in
8688 DT_TEXTREL being set, but support them anyway. */
8689 goto dodyn;
8690
8691 case R_PPC_TPREL32:
8692 if (htab->elf.tls_sec != NULL)
8693 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8694 goto dodyn;
8695
8696 case R_PPC_DTPREL32:
8697 if (htab->elf.tls_sec != NULL)
8698 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8699 goto dodyn;
8700
8701 case R_PPC_DTPMOD32:
8702 relocation = 1;
8703 addend = 0;
8704 goto dodyn;
8705
8706 case R_PPC_REL16:
8707 case R_PPC_REL16_LO:
8708 case R_PPC_REL16_HI:
8709 case R_PPC_REL16_HA:
8710 case R_PPC_REL16DX_HA:
8711 break;
8712
8713 case R_PPC_REL32:
8714 if (h == NULL || h == htab->elf.hgot)
8715 break;
8716 /* fall through */
8717
8718 case R_PPC_ADDR32:
8719 case R_PPC_ADDR16:
8720 case R_PPC_ADDR16_LO:
8721 case R_PPC_ADDR16_HI:
8722 case R_PPC_ADDR16_HA:
8723 case R_PPC_UADDR32:
8724 case R_PPC_UADDR16:
8725 goto dodyn;
8726
8727 case R_PPC_VLE_REL8:
8728 case R_PPC_VLE_REL15:
8729 case R_PPC_VLE_REL24:
8730 case R_PPC_REL24:
8731 case R_PPC_REL14:
8732 case R_PPC_REL14_BRTAKEN:
8733 case R_PPC_REL14_BRNTAKEN:
8734 /* If these relocations are not to a named symbol, they can be
8735 handled right here, no need to bother the dynamic linker. */
8736 if (SYMBOL_CALLS_LOCAL (info, h)
8737 || h == htab->elf.hgot)
8738 break;
8739 /* fall through */
8740
8741 case R_PPC_ADDR24:
8742 case R_PPC_ADDR14:
8743 case R_PPC_ADDR14_BRTAKEN:
8744 case R_PPC_ADDR14_BRNTAKEN:
8745 if (h != NULL && !bfd_link_pic (info))
8746 break;
8747 /* fall through */
8748
8749 dodyn:
8750 if ((input_section->flags & SEC_ALLOC) == 0
8751 || is_vxworks_tls)
8752 break;
8753
8754 if (bfd_link_pic (info)
8755 ? ((h == NULL
8756 || ppc_elf_hash_entry (h)->dyn_relocs != NULL)
8757 && ((h != NULL && pc_dynrelocs (h))
8758 || must_be_dyn_reloc (info, r_type)))
8759 : (h != NULL
8760 && ppc_elf_hash_entry (h)->dyn_relocs != NULL))
8761 {
8762 int skip;
8763 bfd_byte *loc;
8764 asection *sreloc;
8765 long indx = 0;
8766
8767 #ifdef DEBUG
8768 fprintf (stderr, "ppc_elf_relocate_section needs to "
8769 "create relocation for %s\n",
8770 (h && h->root.root.string
8771 ? h->root.root.string : "<unknown>"));
8772 #endif
8773
8774 /* When generating a shared object, these relocations
8775 are copied into the output file to be resolved at run
8776 time. */
8777 skip = 0;
8778 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8779 input_section,
8780 rel->r_offset);
8781 if (outrel.r_offset == (bfd_vma) -1
8782 || outrel.r_offset == (bfd_vma) -2)
8783 skip = (int) outrel.r_offset;
8784 outrel.r_offset += (input_section->output_section->vma
8785 + input_section->output_offset);
8786
8787 if (skip)
8788 memset (&outrel, 0, sizeof outrel);
8789 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
8790 {
8791 indx = h->dynindx;
8792 BFD_ASSERT (indx != -1);
8793 unresolved_reloc = FALSE;
8794 outrel.r_info = ELF32_R_INFO (indx, r_type);
8795 outrel.r_addend = rel->r_addend;
8796 }
8797 else
8798 {
8799 outrel.r_addend = relocation + rel->r_addend;
8800
8801 if (r_type != R_PPC_ADDR32)
8802 {
8803 if (ifunc != NULL)
8804 {
8805 /* If we get here when building a static
8806 executable, then the libc startup function
8807 responsible for applying indirect function
8808 relocations is going to complain about
8809 the reloc type.
8810 If we get here when building a dynamic
8811 executable, it will be because we have
8812 a text relocation. The dynamic loader
8813 will set the text segment writable and
8814 non-executable to apply text relocations.
8815 So we'll segfault when trying to run the
8816 indirection function to resolve the reloc. */
8817 info->callbacks->einfo
8818 /* xgettext:c-format */
8819 (_("%H: relocation %s for indirect "
8820 "function %s unsupported\n"),
8821 input_bfd, input_section, rel->r_offset,
8822 howto->name,
8823 sym_name);
8824 ret = FALSE;
8825 }
8826 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8827 ;
8828 else if (sec == NULL || sec->owner == NULL)
8829 {
8830 bfd_set_error (bfd_error_bad_value);
8831 ret = FALSE;
8832 }
8833 else
8834 {
8835 asection *osec;
8836
8837 /* We are turning this relocation into one
8838 against a section symbol. It would be
8839 proper to subtract the symbol's value,
8840 osec->vma, from the emitted reloc addend,
8841 but ld.so expects buggy relocs.
8842 FIXME: Why not always use a zero index? */
8843 osec = sec->output_section;
8844 indx = elf_section_data (osec)->dynindx;
8845 if (indx == 0)
8846 {
8847 osec = htab->elf.text_index_section;
8848 indx = elf_section_data (osec)->dynindx;
8849 }
8850 BFD_ASSERT (indx != 0);
8851 #ifdef DEBUG
8852 if (indx == 0)
8853 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8854 indx, osec->name, osec->flags,
8855 h->root.root.string);
8856 #endif
8857 }
8858
8859 outrel.r_info = ELF32_R_INFO (indx, r_type);
8860 }
8861 else if (ifunc != NULL)
8862 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8863 else
8864 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8865 }
8866
8867 sreloc = elf_section_data (input_section)->sreloc;
8868 if (ifunc)
8869 {
8870 sreloc = htab->elf.irelplt;
8871 if (indx == 0)
8872 htab->local_ifunc_resolver = 1;
8873 else if (is_static_defined (h))
8874 htab->maybe_local_ifunc_resolver = 1;
8875 }
8876 if (sreloc == NULL)
8877 return FALSE;
8878
8879 loc = sreloc->contents;
8880 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8881 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8882
8883 if (skip == -1)
8884 goto copy_reloc;
8885
8886 /* This reloc will be computed at runtime. Clear the memory
8887 so that it contains a predictable value for prelink. */
8888 if (!skip)
8889 {
8890 relocation = howto->pc_relative ? outrel.r_offset : 0;
8891 addend = 0;
8892 break;
8893 }
8894 }
8895 break;
8896
8897 case R_PPC_RELAX_PLT:
8898 case R_PPC_RELAX_PLTREL24:
8899 if (h != NULL)
8900 {
8901 struct plt_entry *ent;
8902 bfd_vma got2_addend = 0;
8903
8904 if (r_type == R_PPC_RELAX_PLTREL24)
8905 {
8906 if (bfd_link_pic (info))
8907 got2_addend = addend;
8908 addend = 0;
8909 }
8910 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8911 if (htab->plt_type == PLT_NEW)
8912 relocation = (htab->glink->output_section->vma
8913 + htab->glink->output_offset
8914 + ent->glink_offset);
8915 else
8916 relocation = (htab->elf.splt->output_section->vma
8917 + htab->elf.splt->output_offset
8918 + ent->plt.offset);
8919 }
8920 /* Fall through. */
8921
8922 case R_PPC_RELAX:
8923 {
8924 const int *stub;
8925 size_t size;
8926 size_t insn_offset = rel->r_offset;
8927 unsigned int insn;
8928
8929 if (bfd_link_pic (info))
8930 {
8931 relocation -= (input_section->output_section->vma
8932 + input_section->output_offset
8933 + rel->r_offset - 4);
8934 stub = shared_stub_entry;
8935 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
8936 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
8937 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
8938 stub += 3;
8939 size = ARRAY_SIZE (shared_stub_entry) - 3;
8940 }
8941 else
8942 {
8943 stub = stub_entry;
8944 size = ARRAY_SIZE (stub_entry);
8945 }
8946
8947 relocation += addend;
8948 if (bfd_link_relocatable (info))
8949 relocation = 0;
8950
8951 /* First insn is HA, second is LO. */
8952 insn = *stub++;
8953 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8954 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8955 insn_offset += 4;
8956
8957 insn = *stub++;
8958 insn |= relocation & 0xffff;
8959 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8960 insn_offset += 4;
8961 size -= 2;
8962
8963 while (size != 0)
8964 {
8965 insn = *stub++;
8966 --size;
8967 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8968 insn_offset += 4;
8969 }
8970
8971 /* Rewrite the reloc and convert one of the trailing nop
8972 relocs to describe this relocation. */
8973 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8974 /* The relocs are at the bottom 2 bytes */
8975 wrel->r_offset = rel->r_offset + d_offset;
8976 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8977 wrel->r_addend = rel->r_addend;
8978 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
8979 wrel++, rel++;
8980 wrel->r_offset += 4;
8981 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8982 }
8983 continue;
8984
8985 /* Indirect .sdata relocation. */
8986 case R_PPC_EMB_SDAI16:
8987 BFD_ASSERT (htab->sdata[0].section != NULL);
8988 if (!is_static_defined (htab->sdata[0].sym))
8989 {
8990 unresolved_reloc = TRUE;
8991 break;
8992 }
8993 relocation
8994 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8995 h, relocation, rel);
8996 addend = 0;
8997 break;
8998
8999 /* Indirect .sdata2 relocation. */
9000 case R_PPC_EMB_SDA2I16:
9001 BFD_ASSERT (htab->sdata[1].section != NULL);
9002 if (!is_static_defined (htab->sdata[1].sym))
9003 {
9004 unresolved_reloc = TRUE;
9005 break;
9006 }
9007 relocation
9008 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9009 h, relocation, rel);
9010 addend = 0;
9011 break;
9012
9013 /* Handle the TOC16 reloc. We want to use the offset within the .got
9014 section, not the actual VMA. This is appropriate when generating
9015 an embedded ELF object, for which the .got section acts like the
9016 AIX .toc section. */
9017 case R_PPC_TOC16: /* phony GOT16 relocations */
9018 if (sec == NULL || sec->output_section == NULL)
9019 {
9020 unresolved_reloc = TRUE;
9021 break;
9022 }
9023 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9024 ".got") == 0
9025 || strcmp (bfd_get_section_name (sec->owner, sec),
9026 ".cgot") == 0);
9027
9028 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9029 break;
9030
9031 case R_PPC_PLTREL24:
9032 if (h != NULL && ifunc == NULL)
9033 {
9034 struct plt_entry *ent;
9035
9036 ent = find_plt_ent (&h->plt.plist, got2,
9037 bfd_link_pic (info) ? addend : 0);
9038 if (ent == NULL
9039 || htab->elf.splt == NULL)
9040 {
9041 /* We didn't make a PLT entry for this symbol. This
9042 happens when statically linking PIC code, or when
9043 using -Bsymbolic. */
9044 }
9045 else
9046 {
9047 /* Relocation is to the entry for this symbol in the
9048 procedure linkage table. */
9049 unresolved_reloc = FALSE;
9050 if (htab->plt_type == PLT_NEW)
9051 relocation = (htab->glink->output_section->vma
9052 + htab->glink->output_offset
9053 + ent->glink_offset);
9054 else
9055 relocation = (htab->elf.splt->output_section->vma
9056 + htab->elf.splt->output_offset
9057 + ent->plt.offset);
9058 }
9059 }
9060
9061 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9062 addend specifies the GOT pointer offset within .got2.
9063 Don't apply it to the relocation field. */
9064 addend = 0;
9065 break;
9066
9067 /* Relocate against _SDA_BASE_. */
9068 case R_PPC_SDAREL16:
9069 {
9070 const char *name;
9071 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9072
9073 if (sec == NULL
9074 || sec->output_section == NULL
9075 || !is_static_defined (sda))
9076 {
9077 unresolved_reloc = TRUE;
9078 break;
9079 }
9080 addend -= SYM_VAL (sda);
9081
9082 name = bfd_get_section_name (output_bfd, sec->output_section);
9083 if (!(strcmp (name, ".sdata") == 0
9084 || strcmp (name, ".sbss") == 0))
9085 {
9086 info->callbacks->einfo
9087 /* xgettext:c-format */
9088 (_("%P: %B: the target (%s) of a %s relocation is "
9089 "in the wrong output section (%s)\n"),
9090 input_bfd,
9091 sym_name,
9092 howto->name,
9093 name);
9094 }
9095 }
9096 break;
9097
9098 /* Relocate against _SDA2_BASE_. */
9099 case R_PPC_EMB_SDA2REL:
9100 {
9101 const char *name;
9102 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9103
9104 if (sec == NULL
9105 || sec->output_section == NULL
9106 || !is_static_defined (sda))
9107 {
9108 unresolved_reloc = TRUE;
9109 break;
9110 }
9111 addend -= SYM_VAL (sda);
9112
9113 name = bfd_get_section_name (output_bfd, sec->output_section);
9114 if (!(strcmp (name, ".sdata2") == 0
9115 || strcmp (name, ".sbss2") == 0))
9116 {
9117 info->callbacks->einfo
9118 /* xgettext:c-format */
9119 (_("%P: %B: the target (%s) of a %s relocation is "
9120 "in the wrong output section (%s)\n"),
9121 input_bfd,
9122 sym_name,
9123 howto->name,
9124 name);
9125 }
9126 }
9127 break;
9128
9129 case R_PPC_VLE_LO16A:
9130 relocation = relocation + addend;
9131 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9132 contents + rel->r_offset, relocation,
9133 split16a_type, htab->params->vle_reloc_fixup);
9134 goto copy_reloc;
9135
9136 case R_PPC_VLE_LO16D:
9137 relocation = relocation + addend;
9138 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9139 contents + rel->r_offset, relocation,
9140 split16d_type, htab->params->vle_reloc_fixup);
9141 goto copy_reloc;
9142
9143 case R_PPC_VLE_HI16A:
9144 relocation = (relocation + addend) >> 16;
9145 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9146 contents + rel->r_offset, relocation,
9147 split16a_type, htab->params->vle_reloc_fixup);
9148 goto copy_reloc;
9149
9150 case R_PPC_VLE_HI16D:
9151 relocation = (relocation + addend) >> 16;
9152 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9153 contents + rel->r_offset, relocation,
9154 split16d_type, htab->params->vle_reloc_fixup);
9155 goto copy_reloc;
9156
9157 case R_PPC_VLE_HA16A:
9158 relocation = (relocation + addend + 0x8000) >> 16;
9159 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9160 contents + rel->r_offset, relocation,
9161 split16a_type, htab->params->vle_reloc_fixup);
9162 goto copy_reloc;
9163
9164 case R_PPC_VLE_HA16D:
9165 relocation = (relocation + addend + 0x8000) >> 16;
9166 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9167 contents + rel->r_offset, relocation,
9168 split16d_type, htab->params->vle_reloc_fixup);
9169 goto copy_reloc;
9170
9171 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9172 case R_PPC_EMB_SDA21:
9173 case R_PPC_VLE_SDA21:
9174 case R_PPC_EMB_RELSDA:
9175 case R_PPC_VLE_SDA21_LO:
9176 {
9177 const char *name;
9178 int reg;
9179 unsigned int insn;
9180 struct elf_link_hash_entry *sda = NULL;
9181
9182 if (sec == NULL || sec->output_section == NULL)
9183 {
9184 unresolved_reloc = TRUE;
9185 break;
9186 }
9187
9188 name = bfd_get_section_name (output_bfd, sec->output_section);
9189 if (strcmp (name, ".sdata") == 0
9190 || strcmp (name, ".sbss") == 0)
9191 {
9192 reg = 13;
9193 sda = htab->sdata[0].sym;
9194 }
9195 else if (strcmp (name, ".sdata2") == 0
9196 || strcmp (name, ".sbss2") == 0)
9197 {
9198 reg = 2;
9199 sda = htab->sdata[1].sym;
9200 }
9201 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9202 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9203 {
9204 reg = 0;
9205 }
9206 else
9207 {
9208 info->callbacks->einfo
9209 /* xgettext:c-format */
9210 (_("%P: %B: the target (%s) of a %s relocation is "
9211 "in the wrong output section (%s)\n"),
9212 input_bfd,
9213 sym_name,
9214 howto->name,
9215 name);
9216
9217 bfd_set_error (bfd_error_bad_value);
9218 ret = FALSE;
9219 goto copy_reloc;
9220 }
9221
9222 if (sda != NULL)
9223 {
9224 if (!is_static_defined (sda))
9225 {
9226 unresolved_reloc = TRUE;
9227 break;
9228 }
9229 addend -= SYM_VAL (sda);
9230 }
9231
9232 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9233 if (reg == 0
9234 && (r_type == R_PPC_VLE_SDA21
9235 || r_type == R_PPC_VLE_SDA21_LO))
9236 {
9237 relocation = relocation + addend;
9238 addend = 0;
9239
9240 /* Force e_li insn, keeping RT from original insn. */
9241 insn &= 0x1f << 21;
9242 insn |= 28u << 26;
9243
9244 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9245 /* Top 4 bits of value to 17..20. */
9246 insn |= (relocation & 0xf0000) >> 5;
9247 /* Next 5 bits of the value to 11..15. */
9248 insn |= (relocation & 0xf800) << 5;
9249 /* And the final 11 bits of the value to bits 21 to 31. */
9250 insn |= relocation & 0x7ff;
9251
9252 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9253
9254 if (r_type == R_PPC_VLE_SDA21
9255 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9256 goto overflow;
9257 goto copy_reloc;
9258 }
9259 else if (r_type == R_PPC_EMB_SDA21
9260 || r_type == R_PPC_VLE_SDA21
9261 || r_type == R_PPC_VLE_SDA21_LO)
9262 {
9263 /* Fill in register field. */
9264 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9265 }
9266 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9267 }
9268 break;
9269
9270 case R_PPC_VLE_SDAREL_LO16A:
9271 case R_PPC_VLE_SDAREL_LO16D:
9272 case R_PPC_VLE_SDAREL_HI16A:
9273 case R_PPC_VLE_SDAREL_HI16D:
9274 case R_PPC_VLE_SDAREL_HA16A:
9275 case R_PPC_VLE_SDAREL_HA16D:
9276 {
9277 bfd_vma value;
9278 const char *name;
9279 struct elf_link_hash_entry *sda = NULL;
9280
9281 if (sec == NULL || sec->output_section == NULL)
9282 {
9283 unresolved_reloc = TRUE;
9284 break;
9285 }
9286
9287 name = bfd_get_section_name (output_bfd, sec->output_section);
9288 if (strcmp (name, ".sdata") == 0
9289 || strcmp (name, ".sbss") == 0)
9290 sda = htab->sdata[0].sym;
9291 else if (strcmp (name, ".sdata2") == 0
9292 || strcmp (name, ".sbss2") == 0)
9293 sda = htab->sdata[1].sym;
9294 else
9295 {
9296 _bfd_error_handler
9297 /* xgettext:c-format */
9298 (_("%B: the target (%s) of a %s relocation is "
9299 "in the wrong output section (%s)"),
9300 input_bfd,
9301 sym_name,
9302 howto->name,
9303 name);
9304
9305 bfd_set_error (bfd_error_bad_value);
9306 ret = FALSE;
9307 goto copy_reloc;
9308 }
9309
9310 if (sda == NULL || !is_static_defined (sda))
9311 {
9312 unresolved_reloc = TRUE;
9313 break;
9314 }
9315 value = relocation + addend - SYM_VAL (sda);
9316
9317 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9318 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9319 contents + rel->r_offset, value,
9320 split16a_type,
9321 htab->params->vle_reloc_fixup);
9322 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9323 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9324 contents + rel->r_offset, value,
9325 split16d_type,
9326 htab->params->vle_reloc_fixup);
9327 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9328 {
9329 value = value >> 16;
9330 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9331 contents + rel->r_offset, value,
9332 split16a_type,
9333 htab->params->vle_reloc_fixup);
9334 }
9335 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9336 {
9337 value = value >> 16;
9338 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9339 contents + rel->r_offset, value,
9340 split16d_type,
9341 htab->params->vle_reloc_fixup);
9342 }
9343 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
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 split16a_type,
9349 htab->params->vle_reloc_fixup);
9350 }
9351 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9352 {
9353 value = (value + 0x8000) >> 16;
9354 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9355 contents + rel->r_offset, value,
9356 split16d_type,
9357 htab->params->vle_reloc_fixup);
9358 }
9359 }
9360 goto copy_reloc;
9361
9362 case R_PPC_VLE_ADDR20:
9363 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9364 continue;
9365
9366 /* Relocate against the beginning of the section. */
9367 case R_PPC_SECTOFF:
9368 case R_PPC_SECTOFF_LO:
9369 case R_PPC_SECTOFF_HI:
9370 case R_PPC_SECTOFF_HA:
9371 if (sec == NULL || sec->output_section == NULL)
9372 {
9373 unresolved_reloc = TRUE;
9374 break;
9375 }
9376 addend -= sec->output_section->vma;
9377 break;
9378
9379 /* Negative relocations. */
9380 case R_PPC_EMB_NADDR32:
9381 case R_PPC_EMB_NADDR16:
9382 case R_PPC_EMB_NADDR16_LO:
9383 case R_PPC_EMB_NADDR16_HI:
9384 case R_PPC_EMB_NADDR16_HA:
9385 addend -= 2 * relocation;
9386 break;
9387
9388 case R_PPC_COPY:
9389 case R_PPC_GLOB_DAT:
9390 case R_PPC_JMP_SLOT:
9391 case R_PPC_RELATIVE:
9392 case R_PPC_IRELATIVE:
9393 case R_PPC_PLT32:
9394 case R_PPC_PLTREL32:
9395 case R_PPC_PLT16_LO:
9396 case R_PPC_PLT16_HI:
9397 case R_PPC_PLT16_HA:
9398 case R_PPC_ADDR30:
9399 case R_PPC_EMB_RELSEC16:
9400 case R_PPC_EMB_RELST_LO:
9401 case R_PPC_EMB_RELST_HI:
9402 case R_PPC_EMB_RELST_HA:
9403 case R_PPC_EMB_BIT_FLD:
9404 info->callbacks->einfo
9405 /* xgettext:c-format */
9406 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9407 input_bfd,
9408 howto->name,
9409 sym_name);
9410
9411 bfd_set_error (bfd_error_invalid_operation);
9412 ret = FALSE;
9413 goto copy_reloc;
9414 }
9415
9416 /* Do any further special processing. */
9417 switch (r_type)
9418 {
9419 default:
9420 break;
9421
9422 case R_PPC_ADDR16_HA:
9423 case R_PPC_REL16_HA:
9424 case R_PPC_REL16DX_HA:
9425 case R_PPC_SECTOFF_HA:
9426 case R_PPC_TPREL16_HA:
9427 case R_PPC_DTPREL16_HA:
9428 case R_PPC_EMB_NADDR16_HA:
9429 case R_PPC_EMB_RELST_HA:
9430 /* It's just possible that this symbol is a weak symbol
9431 that's not actually defined anywhere. In that case,
9432 'sec' would be NULL, and we should leave the symbol
9433 alone (it will be set to zero elsewhere in the link). */
9434 if (sec == NULL)
9435 break;
9436 /* Fall through. */
9437
9438 case R_PPC_PLT16_HA:
9439 case R_PPC_GOT16_HA:
9440 case R_PPC_GOT_TLSGD16_HA:
9441 case R_PPC_GOT_TLSLD16_HA:
9442 case R_PPC_GOT_TPREL16_HA:
9443 case R_PPC_GOT_DTPREL16_HA:
9444 /* Add 0x10000 if sign bit in 0:15 is set.
9445 Bits 0:15 are not used. */
9446 addend += 0x8000;
9447 break;
9448
9449 case R_PPC_ADDR16:
9450 case R_PPC_ADDR16_LO:
9451 case R_PPC_GOT16:
9452 case R_PPC_GOT16_LO:
9453 case R_PPC_SDAREL16:
9454 case R_PPC_SECTOFF:
9455 case R_PPC_SECTOFF_LO:
9456 case R_PPC_DTPREL16:
9457 case R_PPC_DTPREL16_LO:
9458 case R_PPC_TPREL16:
9459 case R_PPC_TPREL16_LO:
9460 case R_PPC_GOT_TLSGD16:
9461 case R_PPC_GOT_TLSGD16_LO:
9462 case R_PPC_GOT_TLSLD16:
9463 case R_PPC_GOT_TLSLD16_LO:
9464 case R_PPC_GOT_DTPREL16:
9465 case R_PPC_GOT_DTPREL16_LO:
9466 case R_PPC_GOT_TPREL16:
9467 case R_PPC_GOT_TPREL16_LO:
9468 {
9469 /* The 32-bit ABI lacks proper relocations to deal with
9470 certain 64-bit instructions. Prevent damage to bits
9471 that make up part of the insn opcode. */
9472 unsigned int insn, mask, lobit;
9473
9474 insn = bfd_get_32 (input_bfd,
9475 contents + rel->r_offset - d_offset);
9476 mask = 0;
9477 if (is_insn_ds_form (insn))
9478 mask = 3;
9479 else if (is_insn_dq_form (insn))
9480 mask = 15;
9481 else
9482 break;
9483 relocation += addend;
9484 addend = insn & mask;
9485 lobit = mask & relocation;
9486 if (lobit != 0)
9487 {
9488 relocation ^= lobit;
9489 info->callbacks->einfo
9490 /* xgettext:c-format */
9491 (_("%H: error: %s against `%s' not a multiple of %u\n"),
9492 input_bfd, input_section, rel->r_offset,
9493 howto->name, sym_name, mask + 1);
9494 bfd_set_error (bfd_error_bad_value);
9495 ret = FALSE;
9496 }
9497 }
9498 break;
9499 }
9500
9501 #ifdef DEBUG
9502 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9503 "offset = %ld, addend = %ld\n",
9504 howto->name,
9505 (int) r_type,
9506 sym_name,
9507 r_symndx,
9508 (long) rel->r_offset,
9509 (long) addend);
9510 #endif
9511
9512 if (unresolved_reloc
9513 && !((input_section->flags & SEC_DEBUGGING) != 0
9514 && h->def_dynamic)
9515 && _bfd_elf_section_offset (output_bfd, info, input_section,
9516 rel->r_offset) != (bfd_vma) -1)
9517 {
9518 info->callbacks->einfo
9519 /* xgettext:c-format */
9520 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
9521 input_bfd, input_section, rel->r_offset,
9522 howto->name,
9523 sym_name);
9524 ret = FALSE;
9525 }
9526
9527 /* 16-bit fields in insns mostly have signed values, but a
9528 few insns have 16-bit unsigned values. Really, we should
9529 have different reloc types. */
9530 if (howto->complain_on_overflow != complain_overflow_dont
9531 && howto->dst_mask == 0xffff
9532 && (input_section->flags & SEC_CODE) != 0)
9533 {
9534 enum complain_overflow complain = complain_overflow_signed;
9535
9536 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9537 {
9538 unsigned int insn;
9539
9540 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9541 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9542 complain = complain_overflow_bitfield;
9543 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9544 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9545 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9546 complain = complain_overflow_unsigned;
9547 }
9548 if (howto->complain_on_overflow != complain)
9549 {
9550 alt_howto = *howto;
9551 alt_howto.complain_on_overflow = complain;
9552 howto = &alt_howto;
9553 }
9554 }
9555
9556 if (r_type == R_PPC_REL16DX_HA)
9557 {
9558 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9559 if (rel->r_offset + 4 > input_section->size)
9560 r = bfd_reloc_outofrange;
9561 else
9562 {
9563 unsigned int insn;
9564
9565 relocation += addend;
9566 relocation -= (rel->r_offset
9567 + input_section->output_offset
9568 + input_section->output_section->vma);
9569 relocation >>= 16;
9570 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9571 insn &= ~0x1fffc1;
9572 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9573 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9574 r = bfd_reloc_ok;
9575 }
9576 }
9577 else
9578 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9579 rel->r_offset, relocation, addend);
9580
9581 if (r != bfd_reloc_ok)
9582 {
9583 if (r == bfd_reloc_overflow)
9584 {
9585 overflow:
9586 /* On code like "if (foo) foo();" don't report overflow
9587 on a branch to zero when foo is undefined. */
9588 if (!warned
9589 && !(h != NULL
9590 && (h->root.type == bfd_link_hash_undefweak
9591 || h->root.type == bfd_link_hash_undefined)
9592 && is_branch_reloc (r_type)))
9593 info->callbacks->reloc_overflow
9594 (info, (h ? &h->root : NULL), sym_name, howto->name,
9595 rel->r_addend, input_bfd, input_section, rel->r_offset);
9596 }
9597 else
9598 {
9599 info->callbacks->einfo
9600 /* xgettext:c-format */
9601 (_("%H: %s reloc against `%s': error %d\n"),
9602 input_bfd, input_section, rel->r_offset,
9603 howto->name, sym_name, (int) r);
9604 ret = FALSE;
9605 }
9606 }
9607 copy_reloc:
9608 if (wrel != rel)
9609 *wrel = *rel;
9610 }
9611
9612 if (wrel != rel)
9613 {
9614 Elf_Internal_Shdr *rel_hdr;
9615 size_t deleted = rel - wrel;
9616
9617 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9618 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9619 if (rel_hdr->sh_size == 0)
9620 {
9621 /* It is too late to remove an empty reloc section. Leave
9622 one NONE reloc.
9623 ??? What is wrong with an empty section??? */
9624 rel_hdr->sh_size = rel_hdr->sh_entsize;
9625 deleted -= 1;
9626 wrel++;
9627 }
9628 relend = wrel;
9629 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9630 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9631 input_section->reloc_count -= deleted;
9632 }
9633
9634 #ifdef DEBUG
9635 fprintf (stderr, "\n");
9636 #endif
9637
9638 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9639 && input_section->size != input_section->rawsize
9640 && (strcmp (input_section->output_section->name, ".init") == 0
9641 || strcmp (input_section->output_section->name, ".fini") == 0))
9642 {
9643 /* Branch around the trampolines. */
9644 unsigned int insn = B + input_section->size - input_section->rawsize;
9645 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9646 }
9647
9648 if (htab->params->ppc476_workaround
9649 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9650 && (!bfd_link_relocatable (info)
9651 || (input_section->output_section->alignment_power
9652 >= htab->params->pagesize_p2)))
9653 {
9654 bfd_vma start_addr, end_addr, addr;
9655 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9656
9657 if (relax_info->workaround_size != 0)
9658 {
9659 bfd_byte *p;
9660 unsigned int n;
9661 bfd_byte fill[4];
9662
9663 bfd_put_32 (input_bfd, BA, fill);
9664 p = contents + input_section->size - relax_info->workaround_size;
9665 n = relax_info->workaround_size >> 2;
9666 while (n--)
9667 {
9668 memcpy (p, fill, 4);
9669 p += 4;
9670 }
9671 }
9672
9673 /* The idea is: Replace the last instruction on a page with a
9674 branch to a patch area. Put the insn there followed by a
9675 branch back to the next page. Complicated a little by
9676 needing to handle moved conditional branches, and by not
9677 wanting to touch data-in-text. */
9678
9679 start_addr = (input_section->output_section->vma
9680 + input_section->output_offset);
9681 end_addr = (start_addr + input_section->size
9682 - relax_info->workaround_size);
9683 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9684 addr < end_addr;
9685 addr += pagesize)
9686 {
9687 bfd_vma offset = addr - start_addr;
9688 Elf_Internal_Rela *lo, *hi;
9689 bfd_boolean is_data;
9690 bfd_vma patch_off, patch_addr;
9691 unsigned int insn;
9692
9693 /* Do we have a data reloc at this offset? If so, leave
9694 the word alone. */
9695 is_data = FALSE;
9696 lo = relocs;
9697 hi = relend;
9698 rel = NULL;
9699 while (lo < hi)
9700 {
9701 rel = lo + (hi - lo) / 2;
9702 if (rel->r_offset < offset)
9703 lo = rel + 1;
9704 else if (rel->r_offset > offset + 3)
9705 hi = rel;
9706 else
9707 {
9708 switch (ELF32_R_TYPE (rel->r_info))
9709 {
9710 case R_PPC_ADDR32:
9711 case R_PPC_UADDR32:
9712 case R_PPC_REL32:
9713 case R_PPC_ADDR30:
9714 is_data = TRUE;
9715 break;
9716 default:
9717 break;
9718 }
9719 break;
9720 }
9721 }
9722 if (is_data)
9723 continue;
9724
9725 /* Some instructions can be left alone too. Unconditional
9726 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9727 avoid the icache failure.
9728
9729 The problem occurs due to prefetch across a page boundary
9730 where stale instructions can be fetched from the next
9731 page, and the mechanism for flushing these bad
9732 instructions fails under certain circumstances. The
9733 unconditional branches:
9734 1) Branch: b, bl, ba, bla,
9735 2) Branch Conditional: bc, bca, bcl, bcla,
9736 3) Branch Conditional to Link Register: bclr, bclrl,
9737 where (2) and (3) have BO=0x14 making them unconditional,
9738 prevent the bad prefetch because the prefetch itself is
9739 affected by these instructions. This happens even if the
9740 instruction is not executed.
9741
9742 A bctr example:
9743 .
9744 . lis 9,new_page@ha
9745 . addi 9,9,new_page@l
9746 . mtctr 9
9747 . bctr
9748 . nop
9749 . nop
9750 . new_page:
9751 .
9752 The bctr is not predicted taken due to ctr not being
9753 ready, so prefetch continues on past the bctr into the
9754 new page which might have stale instructions. If they
9755 fail to be flushed, then they will be executed after the
9756 bctr executes. Either of the following modifications
9757 prevent the bad prefetch from happening in the first
9758 place:
9759 .
9760 . lis 9,new_page@ha lis 9,new_page@ha
9761 . addi 9,9,new_page@l addi 9,9,new_page@l
9762 . mtctr 9 mtctr 9
9763 . bctr bctr
9764 . nop b somewhere_else
9765 . b somewhere_else nop
9766 . new_page: new_page:
9767 . */
9768 insn = bfd_get_32 (input_bfd, contents + offset);
9769 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9770 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9771 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9772 || ((insn & (0x3f << 26)) == (19u << 26)
9773 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9774 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9775 continue;
9776
9777 patch_addr = (start_addr + input_section->size
9778 - relax_info->workaround_size);
9779 patch_addr = (patch_addr + 15) & -16;
9780 patch_off = patch_addr - start_addr;
9781 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9782
9783 if (rel != NULL
9784 && rel->r_offset >= offset
9785 && rel->r_offset < offset + 4)
9786 {
9787 asection *sreloc;
9788
9789 /* If the insn we are patching had a reloc, adjust the
9790 reloc r_offset so that the reloc applies to the moved
9791 location. This matters for -r and --emit-relocs. */
9792 if (rel + 1 != relend)
9793 {
9794 Elf_Internal_Rela tmp = *rel;
9795
9796 /* Keep the relocs sorted by r_offset. */
9797 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9798 relend[-1] = tmp;
9799 }
9800 relend[-1].r_offset += patch_off - offset;
9801
9802 /* Adjust REL16 addends too. */
9803 switch (ELF32_R_TYPE (relend[-1].r_info))
9804 {
9805 case R_PPC_REL16:
9806 case R_PPC_REL16_LO:
9807 case R_PPC_REL16_HI:
9808 case R_PPC_REL16_HA:
9809 relend[-1].r_addend += patch_off - offset;
9810 break;
9811 default:
9812 break;
9813 }
9814
9815 /* If we are building a PIE or shared library with
9816 non-PIC objects, perhaps we had a dynamic reloc too?
9817 If so, the dynamic reloc must move with the insn. */
9818 sreloc = elf_section_data (input_section)->sreloc;
9819 if (sreloc != NULL)
9820 {
9821 Elf32_External_Rela *slo, *shi, *srelend;
9822 bfd_vma soffset;
9823
9824 slo = (Elf32_External_Rela *) sreloc->contents;
9825 shi = srelend = slo + sreloc->reloc_count;
9826 soffset = (offset + input_section->output_section->vma
9827 + input_section->output_offset);
9828 while (slo < shi)
9829 {
9830 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9831 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9832 &outrel);
9833 if (outrel.r_offset < soffset)
9834 slo = srel + 1;
9835 else if (outrel.r_offset > soffset + 3)
9836 shi = srel;
9837 else
9838 {
9839 if (srel + 1 != srelend)
9840 {
9841 memmove (srel, srel + 1,
9842 (srelend - (srel + 1)) * sizeof (*srel));
9843 srel = srelend - 1;
9844 }
9845 outrel.r_offset += patch_off - offset;
9846 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9847 (bfd_byte *) srel);
9848 break;
9849 }
9850 }
9851 }
9852 }
9853 else
9854 rel = NULL;
9855
9856 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9857 && (insn & 2) == 0 /* relative */)
9858 {
9859 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9860
9861 delta += offset - patch_off;
9862 if (bfd_link_relocatable (info) && rel != NULL)
9863 delta = 0;
9864 if (!bfd_link_relocatable (info) && rel != NULL)
9865 {
9866 enum elf_ppc_reloc_type r_type;
9867
9868 r_type = ELF32_R_TYPE (relend[-1].r_info);
9869 if (r_type == R_PPC_REL14_BRTAKEN)
9870 insn |= BRANCH_PREDICT_BIT;
9871 else if (r_type == R_PPC_REL14_BRNTAKEN)
9872 insn &= ~BRANCH_PREDICT_BIT;
9873 else
9874 BFD_ASSERT (r_type == R_PPC_REL14);
9875
9876 if ((r_type == R_PPC_REL14_BRTAKEN
9877 || r_type == R_PPC_REL14_BRNTAKEN)
9878 && delta + 0x8000 < 0x10000
9879 && (bfd_signed_vma) delta < 0)
9880 insn ^= BRANCH_PREDICT_BIT;
9881 }
9882 if (delta + 0x8000 < 0x10000)
9883 {
9884 bfd_put_32 (input_bfd,
9885 (insn & ~0xfffc) | (delta & 0xfffc),
9886 contents + patch_off);
9887 patch_off += 4;
9888 bfd_put_32 (input_bfd,
9889 B | ((offset + 4 - patch_off) & 0x3fffffc),
9890 contents + patch_off);
9891 patch_off += 4;
9892 }
9893 else
9894 {
9895 if (rel != NULL)
9896 {
9897 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9898
9899 relend[-1].r_offset += 8;
9900 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9901 }
9902 bfd_put_32 (input_bfd,
9903 (insn & ~0xfffc) | 8,
9904 contents + patch_off);
9905 patch_off += 4;
9906 bfd_put_32 (input_bfd,
9907 B | ((offset + 4 - patch_off) & 0x3fffffc),
9908 contents + patch_off);
9909 patch_off += 4;
9910 bfd_put_32 (input_bfd,
9911 B | ((delta - 8) & 0x3fffffc),
9912 contents + patch_off);
9913 patch_off += 4;
9914 }
9915 }
9916 else
9917 {
9918 bfd_put_32 (input_bfd, insn, contents + patch_off);
9919 patch_off += 4;
9920 bfd_put_32 (input_bfd,
9921 B | ((offset + 4 - patch_off) & 0x3fffffc),
9922 contents + patch_off);
9923 patch_off += 4;
9924 }
9925 BFD_ASSERT (patch_off <= input_section->size);
9926 relax_info->workaround_size = input_section->size - patch_off;
9927 }
9928 }
9929
9930 return ret;
9931 }
9932 \f
9933 /* Finish up dynamic symbol handling. We set the contents of various
9934 dynamic sections here. */
9935
9936 static bfd_boolean
9937 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9938 struct bfd_link_info *info,
9939 struct elf_link_hash_entry *h,
9940 Elf_Internal_Sym *sym)
9941 {
9942 struct ppc_elf_link_hash_table *htab;
9943 struct plt_entry *ent;
9944 bfd_boolean doneone;
9945
9946 #ifdef DEBUG
9947 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9948 h->root.root.string);
9949 #endif
9950
9951 htab = ppc_elf_hash_table (info);
9952 BFD_ASSERT (htab->elf.dynobj != NULL);
9953
9954 doneone = FALSE;
9955 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9956 if (ent->plt.offset != (bfd_vma) -1)
9957 {
9958 if (!doneone)
9959 {
9960 Elf_Internal_Rela rela;
9961 bfd_byte *loc;
9962 bfd_vma reloc_index;
9963
9964 if (htab->plt_type == PLT_NEW
9965 || !htab->elf.dynamic_sections_created
9966 || h->dynindx == -1)
9967 reloc_index = ent->plt.offset / 4;
9968 else
9969 {
9970 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9971 / htab->plt_slot_size);
9972 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9973 && htab->plt_type == PLT_OLD)
9974 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9975 }
9976
9977 /* This symbol has an entry in the procedure linkage table.
9978 Set it up. */
9979 if (htab->plt_type == PLT_VXWORKS
9980 && htab->elf.dynamic_sections_created
9981 && h->dynindx != -1)
9982 {
9983 bfd_vma got_offset;
9984 const bfd_vma *plt_entry;
9985
9986 /* The first three entries in .got.plt are reserved. */
9987 got_offset = (reloc_index + 3) * 4;
9988
9989 /* Use the right PLT. */
9990 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
9991 : ppc_elf_vxworks_plt_entry;
9992
9993 /* Fill in the .plt on VxWorks. */
9994 if (bfd_link_pic (info))
9995 {
9996 bfd_put_32 (output_bfd,
9997 plt_entry[0] | PPC_HA (got_offset),
9998 htab->elf.splt->contents + ent->plt.offset + 0);
9999 bfd_put_32 (output_bfd,
10000 plt_entry[1] | PPC_LO (got_offset),
10001 htab->elf.splt->contents + ent->plt.offset + 4);
10002 }
10003 else
10004 {
10005 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10006
10007 bfd_put_32 (output_bfd,
10008 plt_entry[0] | PPC_HA (got_loc),
10009 htab->elf.splt->contents + ent->plt.offset + 0);
10010 bfd_put_32 (output_bfd,
10011 plt_entry[1] | PPC_LO (got_loc),
10012 htab->elf.splt->contents + ent->plt.offset + 4);
10013 }
10014
10015 bfd_put_32 (output_bfd, plt_entry[2],
10016 htab->elf.splt->contents + ent->plt.offset + 8);
10017 bfd_put_32 (output_bfd, plt_entry[3],
10018 htab->elf.splt->contents + ent->plt.offset + 12);
10019
10020 /* This instruction is an immediate load. The value loaded is
10021 the byte offset of the R_PPC_JMP_SLOT relocation from the
10022 start of the .rela.plt section. The value is stored in the
10023 low-order 16 bits of the load instruction. */
10024 /* NOTE: It appears that this is now an index rather than a
10025 prescaled offset. */
10026 bfd_put_32 (output_bfd,
10027 plt_entry[4] | reloc_index,
10028 htab->elf.splt->contents + ent->plt.offset + 16);
10029 /* This instruction is a PC-relative branch whose target is
10030 the start of the PLT section. The address of this branch
10031 instruction is 20 bytes beyond the start of this PLT entry.
10032 The address is encoded in bits 6-29, inclusive. The value
10033 stored is right-shifted by two bits, permitting a 26-bit
10034 offset. */
10035 bfd_put_32 (output_bfd,
10036 (plt_entry[5]
10037 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10038 htab->elf.splt->contents + ent->plt.offset + 20);
10039 bfd_put_32 (output_bfd, plt_entry[6],
10040 htab->elf.splt->contents + ent->plt.offset + 24);
10041 bfd_put_32 (output_bfd, plt_entry[7],
10042 htab->elf.splt->contents + ent->plt.offset + 28);
10043
10044 /* Fill in the GOT entry corresponding to this PLT slot with
10045 the address immediately after the "bctr" instruction
10046 in this PLT entry. */
10047 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10048 + htab->elf.splt->output_offset
10049 + ent->plt.offset + 16),
10050 htab->elf.sgotplt->contents + got_offset);
10051
10052 if (!bfd_link_pic (info))
10053 {
10054 /* Fill in a couple of entries in .rela.plt.unloaded. */
10055 loc = htab->srelplt2->contents
10056 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10057 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10058 * sizeof (Elf32_External_Rela));
10059
10060 /* Provide the @ha relocation for the first instruction. */
10061 rela.r_offset = (htab->elf.splt->output_section->vma
10062 + htab->elf.splt->output_offset
10063 + ent->plt.offset + 2);
10064 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10065 R_PPC_ADDR16_HA);
10066 rela.r_addend = got_offset;
10067 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10068 loc += sizeof (Elf32_External_Rela);
10069
10070 /* Provide the @l relocation for the second instruction. */
10071 rela.r_offset = (htab->elf.splt->output_section->vma
10072 + htab->elf.splt->output_offset
10073 + ent->plt.offset + 6);
10074 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10075 R_PPC_ADDR16_LO);
10076 rela.r_addend = got_offset;
10077 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10078 loc += sizeof (Elf32_External_Rela);
10079
10080 /* Provide a relocation for the GOT entry corresponding to this
10081 PLT slot. Point it at the middle of the .plt entry. */
10082 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10083 + htab->elf.sgotplt->output_offset
10084 + got_offset);
10085 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10086 R_PPC_ADDR32);
10087 rela.r_addend = ent->plt.offset + 16;
10088 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10089 }
10090
10091 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10092 In particular, the offset for the relocation is not the
10093 address of the PLT entry for this function, as specified
10094 by the ABI. Instead, the offset is set to the address of
10095 the GOT slot for this function. See EABI 4.4.4.1. */
10096 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10097 + htab->elf.sgotplt->output_offset
10098 + got_offset);
10099
10100 }
10101 else
10102 {
10103 asection *splt = htab->elf.splt;
10104 if (!htab->elf.dynamic_sections_created
10105 || h->dynindx == -1)
10106 splt = htab->elf.iplt;
10107
10108 rela.r_offset = (splt->output_section->vma
10109 + splt->output_offset
10110 + ent->plt.offset);
10111 if (htab->plt_type == PLT_OLD
10112 || !htab->elf.dynamic_sections_created
10113 || h->dynindx == -1)
10114 {
10115 /* We don't need to fill in the .plt. The ppc dynamic
10116 linker will fill it in. */
10117 }
10118 else
10119 {
10120 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10121 + htab->glink->output_section->vma
10122 + htab->glink->output_offset);
10123 bfd_put_32 (output_bfd, val,
10124 splt->contents + ent->plt.offset);
10125 }
10126 }
10127
10128 /* Fill in the entry in the .rela.plt section. */
10129 rela.r_addend = 0;
10130 if (!htab->elf.dynamic_sections_created
10131 || h->dynindx == -1)
10132 {
10133 BFD_ASSERT (h->type == STT_GNU_IFUNC
10134 && h->def_regular
10135 && (h->root.type == bfd_link_hash_defined
10136 || h->root.type == bfd_link_hash_defweak));
10137 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10138 rela.r_addend = SYM_VAL (h);
10139 }
10140 else
10141 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10142
10143 if (!htab->elf.dynamic_sections_created
10144 || h->dynindx == -1)
10145 {
10146 loc = (htab->elf.irelplt->contents
10147 + (htab->elf.irelplt->reloc_count++
10148 * sizeof (Elf32_External_Rela)));
10149 htab->local_ifunc_resolver = 1;
10150 }
10151 else
10152 {
10153 loc = (htab->elf.srelplt->contents
10154 + reloc_index * sizeof (Elf32_External_Rela));
10155 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10156 htab->maybe_local_ifunc_resolver = 1;
10157 }
10158 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10159
10160 if (!h->def_regular)
10161 {
10162 /* Mark the symbol as undefined, rather than as
10163 defined in the .plt section. Leave the value if
10164 there were any relocations where pointer equality
10165 matters (this is a clue for the dynamic linker, to
10166 make function pointer comparisons work between an
10167 application and shared library), otherwise set it
10168 to zero. */
10169 sym->st_shndx = SHN_UNDEF;
10170 if (!h->pointer_equality_needed)
10171 sym->st_value = 0;
10172 else if (!h->ref_regular_nonweak)
10173 {
10174 /* This breaks function pointer comparisons, but
10175 that is better than breaking tests for a NULL
10176 function pointer. */
10177 sym->st_value = 0;
10178 }
10179 }
10180 else if (h->type == STT_GNU_IFUNC
10181 && !bfd_link_pic (info))
10182 {
10183 /* Set the value of ifunc symbols in a non-pie
10184 executable to the glink entry. This is to avoid
10185 text relocations. We can't do this for ifunc in
10186 allocate_dynrelocs, as we do for normal dynamic
10187 function symbols with plt entries, because we need
10188 to keep the original value around for the ifunc
10189 relocation. */
10190 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10191 (output_bfd, htab->glink->output_section));
10192 sym->st_value = (ent->glink_offset
10193 + htab->glink->output_offset
10194 + htab->glink->output_section->vma);
10195 }
10196 doneone = TRUE;
10197 }
10198
10199 if (htab->plt_type == PLT_NEW
10200 || !htab->elf.dynamic_sections_created
10201 || h->dynindx == -1)
10202 {
10203 unsigned char *p;
10204 asection *splt = htab->elf.splt;
10205 if (!htab->elf.dynamic_sections_created
10206 || h->dynindx == -1)
10207 splt = htab->elf.iplt;
10208
10209 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10210
10211 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10212 {
10213 bfd_put_32 (output_bfd, LWZ_11_3, p);
10214 p += 4;
10215 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10216 p += 4;
10217 bfd_put_32 (output_bfd, MR_0_3, p);
10218 p += 4;
10219 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10220 p += 4;
10221 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10222 p += 4;
10223 bfd_put_32 (output_bfd, BEQLR, p);
10224 p += 4;
10225 bfd_put_32 (output_bfd, MR_3_0, p);
10226 p += 4;
10227 bfd_put_32 (output_bfd, NOP, p);
10228 p += 4;
10229 }
10230
10231 write_glink_stub (ent, splt, p, info);
10232
10233 if (!bfd_link_pic (info))
10234 /* We only need one non-PIC glink stub. */
10235 break;
10236 }
10237 else
10238 break;
10239 }
10240
10241 if (h->needs_copy)
10242 {
10243 asection *s;
10244 Elf_Internal_Rela rela;
10245 bfd_byte *loc;
10246
10247 /* This symbols needs a copy reloc. Set it up. */
10248
10249 #ifdef DEBUG
10250 fprintf (stderr, ", copy");
10251 #endif
10252
10253 BFD_ASSERT (h->dynindx != -1);
10254
10255 if (ppc_elf_hash_entry (h)->has_sda_refs)
10256 s = htab->relsbss;
10257 else if (h->root.u.def.section == htab->elf.sdynrelro)
10258 s = htab->elf.sreldynrelro;
10259 else
10260 s = htab->elf.srelbss;
10261 BFD_ASSERT (s != NULL);
10262
10263 rela.r_offset = SYM_VAL (h);
10264 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10265 rela.r_addend = 0;
10266 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10267 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10268 }
10269
10270 #ifdef DEBUG
10271 fprintf (stderr, "\n");
10272 #endif
10273
10274 return TRUE;
10275 }
10276 \f
10277 static enum elf_reloc_type_class
10278 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10279 const asection *rel_sec,
10280 const Elf_Internal_Rela *rela)
10281 {
10282 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10283
10284 if (rel_sec == htab->elf.irelplt)
10285 return reloc_class_ifunc;
10286
10287 switch (ELF32_R_TYPE (rela->r_info))
10288 {
10289 case R_PPC_RELATIVE:
10290 return reloc_class_relative;
10291 case R_PPC_JMP_SLOT:
10292 return reloc_class_plt;
10293 case R_PPC_COPY:
10294 return reloc_class_copy;
10295 default:
10296 return reloc_class_normal;
10297 }
10298 }
10299 \f
10300 /* Finish up the dynamic sections. */
10301
10302 static bfd_boolean
10303 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10304 struct bfd_link_info *info)
10305 {
10306 asection *sdyn;
10307 struct ppc_elf_link_hash_table *htab;
10308 bfd_vma got;
10309 bfd *dynobj;
10310 bfd_boolean ret = TRUE;
10311
10312 #ifdef DEBUG
10313 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10314 #endif
10315
10316 htab = ppc_elf_hash_table (info);
10317 dynobj = htab->elf.dynobj;
10318 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10319
10320 got = 0;
10321 if (htab->elf.hgot != NULL)
10322 got = SYM_VAL (htab->elf.hgot);
10323
10324 if (htab->elf.dynamic_sections_created)
10325 {
10326 Elf32_External_Dyn *dyncon, *dynconend;
10327
10328 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10329
10330 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10331 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10332 for (; dyncon < dynconend; dyncon++)
10333 {
10334 Elf_Internal_Dyn dyn;
10335 asection *s;
10336
10337 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10338
10339 switch (dyn.d_tag)
10340 {
10341 case DT_PLTGOT:
10342 if (htab->is_vxworks)
10343 s = htab->elf.sgotplt;
10344 else
10345 s = htab->elf.splt;
10346 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10347 break;
10348
10349 case DT_PLTRELSZ:
10350 dyn.d_un.d_val = htab->elf.srelplt->size;
10351 break;
10352
10353 case DT_JMPREL:
10354 s = htab->elf.srelplt;
10355 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10356 break;
10357
10358 case DT_PPC_GOT:
10359 dyn.d_un.d_ptr = got;
10360 break;
10361
10362 case DT_TEXTREL:
10363 if (htab->local_ifunc_resolver)
10364 info->callbacks->einfo
10365 (_("%X%P: text relocations and GNU indirect "
10366 "functions will result in a segfault at runtime\n"));
10367 else if (htab->maybe_local_ifunc_resolver)
10368 info->callbacks->einfo
10369 (_("%P: warning: text relocations and GNU indirect "
10370 "functions may result in a segfault at runtime\n"));
10371 continue;
10372
10373 default:
10374 if (htab->is_vxworks
10375 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10376 break;
10377 continue;
10378 }
10379
10380 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10381 }
10382 }
10383
10384 if (htab->elf.sgot != NULL
10385 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
10386 {
10387 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10388 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10389 {
10390 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10391
10392 p += htab->elf.hgot->root.u.def.value;
10393 if (htab->plt_type == PLT_OLD)
10394 {
10395 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10396 so that a function can easily find the address of
10397 _GLOBAL_OFFSET_TABLE_. */
10398 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10399 < htab->elf.hgot->root.u.def.section->size);
10400 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10401 }
10402
10403 if (sdyn != NULL)
10404 {
10405 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10406 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10407 < htab->elf.hgot->root.u.def.section->size);
10408 bfd_put_32 (output_bfd, val, p);
10409 }
10410 }
10411 else
10412 {
10413 /* xgettext:c-format */
10414 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10415 htab->elf.hgot->root.root.string,
10416 (htab->elf.sgotplt != NULL
10417 ? htab->elf.sgotplt->name
10418 : htab->elf.sgot->name));
10419 bfd_set_error (bfd_error_bad_value);
10420 ret = FALSE;
10421 }
10422
10423 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10424 }
10425
10426 /* Fill in the first entry in the VxWorks procedure linkage table. */
10427 if (htab->is_vxworks
10428 && htab->elf.splt != NULL
10429 && htab->elf.splt->size != 0
10430 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10431 {
10432 asection *splt = htab->elf.splt;
10433 /* Use the right PLT. */
10434 const bfd_vma *plt_entry = (bfd_link_pic (info)
10435 ? ppc_elf_vxworks_pic_plt0_entry
10436 : ppc_elf_vxworks_plt0_entry);
10437
10438 if (!bfd_link_pic (info))
10439 {
10440 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10441
10442 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10443 splt->contents + 0);
10444 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10445 splt->contents + 4);
10446 }
10447 else
10448 {
10449 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10450 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10451 }
10452 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10453 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10454 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10455 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10456 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10457 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10458
10459 if (! bfd_link_pic (info))
10460 {
10461 Elf_Internal_Rela rela;
10462 bfd_byte *loc;
10463
10464 loc = htab->srelplt2->contents;
10465
10466 /* Output the @ha relocation for the first instruction. */
10467 rela.r_offset = (htab->elf.splt->output_section->vma
10468 + htab->elf.splt->output_offset
10469 + 2);
10470 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10471 rela.r_addend = 0;
10472 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10473 loc += sizeof (Elf32_External_Rela);
10474
10475 /* Output the @l relocation for the second instruction. */
10476 rela.r_offset = (htab->elf.splt->output_section->vma
10477 + htab->elf.splt->output_offset
10478 + 6);
10479 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10480 rela.r_addend = 0;
10481 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10482 loc += sizeof (Elf32_External_Rela);
10483
10484 /* Fix up the remaining relocations. They may have the wrong
10485 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10486 in which symbols were output. */
10487 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10488 {
10489 Elf_Internal_Rela rel;
10490
10491 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10492 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10493 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10494 loc += sizeof (Elf32_External_Rela);
10495
10496 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10497 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10498 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10499 loc += sizeof (Elf32_External_Rela);
10500
10501 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10502 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10503 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10504 loc += sizeof (Elf32_External_Rela);
10505 }
10506 }
10507 }
10508
10509 if (htab->glink != NULL
10510 && htab->glink->contents != NULL
10511 && htab->elf.dynamic_sections_created)
10512 {
10513 unsigned char *p;
10514 unsigned char *endp;
10515 bfd_vma res0;
10516 unsigned int i;
10517
10518 /*
10519 * PIC glink code is the following:
10520 *
10521 * # ith PLT code stub.
10522 * addis 11,30,(plt+(i-1)*4-got)@ha
10523 * lwz 11,(plt+(i-1)*4-got)@l(11)
10524 * mtctr 11
10525 * bctr
10526 *
10527 * # A table of branches, one for each plt entry.
10528 * # The idea is that the plt call stub loads ctr and r11 with these
10529 * # addresses, so (r11 - res_0) gives the plt index * 4.
10530 * res_0: b PLTresolve
10531 * res_1: b PLTresolve
10532 * .
10533 * # Some number of entries towards the end can be nops
10534 * res_n_m3: nop
10535 * res_n_m2: nop
10536 * res_n_m1:
10537 *
10538 * PLTresolve:
10539 * addis 11,11,(1f-res_0)@ha
10540 * mflr 0
10541 * bcl 20,31,1f
10542 * 1: addi 11,11,(1b-res_0)@l
10543 * mflr 12
10544 * mtlr 0
10545 * sub 11,11,12 # r11 = index * 4
10546 * addis 12,12,(got+4-1b)@ha
10547 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10548 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10549 * mtctr 0
10550 * add 0,11,11
10551 * add 11,0,11 # r11 = index * 12 = reloc offset.
10552 * bctr
10553 */
10554 static const unsigned int pic_plt_resolve[] =
10555 {
10556 ADDIS_11_11,
10557 MFLR_0,
10558 BCL_20_31,
10559 ADDI_11_11,
10560 MFLR_12,
10561 MTLR_0,
10562 SUB_11_11_12,
10563 ADDIS_12_12,
10564 LWZ_0_12,
10565 LWZ_12_12,
10566 MTCTR_0,
10567 ADD_0_11_11,
10568 ADD_11_0_11,
10569 BCTR,
10570 NOP,
10571 NOP
10572 };
10573
10574 /*
10575 * Non-PIC glink code is a little simpler.
10576 *
10577 * # ith PLT code stub.
10578 * lis 11,(plt+(i-1)*4)@ha
10579 * lwz 11,(plt+(i-1)*4)@l(11)
10580 * mtctr 11
10581 * bctr
10582 *
10583 * The branch table is the same, then comes
10584 *
10585 * PLTresolve:
10586 * lis 12,(got+4)@ha
10587 * addis 11,11,(-res_0)@ha
10588 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10589 * addi 11,11,(-res_0)@l # r11 = index * 4
10590 * mtctr 0
10591 * add 0,11,11
10592 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10593 * add 11,0,11 # r11 = index * 12 = reloc offset.
10594 * bctr
10595 */
10596 static const unsigned int plt_resolve[] =
10597 {
10598 LIS_12,
10599 ADDIS_11_11,
10600 LWZ_0_12,
10601 ADDI_11_11,
10602 MTCTR_0,
10603 ADD_0_11_11,
10604 LWZ_12_12,
10605 ADD_11_0_11,
10606 BCTR,
10607 NOP,
10608 NOP,
10609 NOP,
10610 NOP,
10611 NOP,
10612 NOP,
10613 NOP
10614 };
10615
10616 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10617 abort ();
10618 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10619 abort ();
10620
10621 /* Build the branch table, one for each plt entry (less one),
10622 and perhaps some padding. */
10623 p = htab->glink->contents;
10624 p += htab->glink_pltresolve;
10625 endp = htab->glink->contents;
10626 endp += htab->glink->size - GLINK_PLTRESOLVE;
10627 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10628 {
10629 bfd_put_32 (output_bfd, B + endp - p, p);
10630 p += 4;
10631 }
10632 while (p < endp)
10633 {
10634 bfd_put_32 (output_bfd, NOP, p);
10635 p += 4;
10636 }
10637
10638 res0 = (htab->glink_pltresolve
10639 + htab->glink->output_section->vma
10640 + htab->glink->output_offset);
10641
10642 if (htab->params->ppc476_workaround)
10643 {
10644 /* Ensure that a call stub at the end of a page doesn't
10645 result in prefetch over the end of the page into the
10646 glink branch table. */
10647 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10648 bfd_vma page_addr;
10649 bfd_vma glink_start = (htab->glink->output_section->vma
10650 + htab->glink->output_offset);
10651
10652 for (page_addr = res0 & -pagesize;
10653 page_addr > glink_start;
10654 page_addr -= pagesize)
10655 {
10656 /* We have a plt call stub that may need fixing. */
10657 bfd_byte *loc;
10658 unsigned int insn;
10659
10660 loc = htab->glink->contents + page_addr - 4 - glink_start;
10661 insn = bfd_get_32 (output_bfd, loc);
10662 if (insn == BCTR)
10663 {
10664 /* By alignment, we know that there must be at least
10665 one other call stub before this one. */
10666 insn = bfd_get_32 (output_bfd, loc - 16);
10667 if (insn == BCTR)
10668 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10669 else
10670 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10671 }
10672 }
10673 }
10674
10675 /* Last comes the PLTresolve stub. */
10676 if (bfd_link_pic (info))
10677 {
10678 bfd_vma bcl;
10679
10680 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10681 {
10682 unsigned int insn = pic_plt_resolve[i];
10683
10684 if (htab->params->ppc476_workaround && insn == NOP)
10685 insn = BA + 0;
10686 bfd_put_32 (output_bfd, insn, p);
10687 p += 4;
10688 }
10689 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10690
10691 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10692 + htab->glink->output_section->vma
10693 + htab->glink->output_offset);
10694
10695 bfd_put_32 (output_bfd,
10696 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10697 bfd_put_32 (output_bfd,
10698 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10699 bfd_put_32 (output_bfd,
10700 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10701 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10702 {
10703 bfd_put_32 (output_bfd,
10704 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10705 bfd_put_32 (output_bfd,
10706 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10707 }
10708 else
10709 {
10710 bfd_put_32 (output_bfd,
10711 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10712 bfd_put_32 (output_bfd,
10713 LWZ_12_12 + 4, p + 9*4);
10714 }
10715 }
10716 else
10717 {
10718 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10719 {
10720 unsigned int insn = plt_resolve[i];
10721
10722 if (htab->params->ppc476_workaround && insn == NOP)
10723 insn = BA + 0;
10724 bfd_put_32 (output_bfd, insn, p);
10725 p += 4;
10726 }
10727 p -= 4 * ARRAY_SIZE (plt_resolve);
10728
10729 bfd_put_32 (output_bfd,
10730 LIS_12 + PPC_HA (got + 4), p + 0*4);
10731 bfd_put_32 (output_bfd,
10732 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10733 bfd_put_32 (output_bfd,
10734 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10735 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10736 {
10737 bfd_put_32 (output_bfd,
10738 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10739 bfd_put_32 (output_bfd,
10740 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10741 }
10742 else
10743 {
10744 bfd_put_32 (output_bfd,
10745 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10746 bfd_put_32 (output_bfd,
10747 LWZ_12_12 + 4, p + 6*4);
10748 }
10749 }
10750 }
10751
10752 if (htab->glink_eh_frame != NULL
10753 && htab->glink_eh_frame->contents != NULL)
10754 {
10755 unsigned char *p = htab->glink_eh_frame->contents;
10756 bfd_vma val;
10757
10758 p += sizeof (glink_eh_frame_cie);
10759 /* FDE length. */
10760 p += 4;
10761 /* CIE pointer. */
10762 p += 4;
10763 /* Offset to .glink. */
10764 val = (htab->glink->output_section->vma
10765 + htab->glink->output_offset);
10766 val -= (htab->glink_eh_frame->output_section->vma
10767 + htab->glink_eh_frame->output_offset);
10768 val -= p - htab->glink_eh_frame->contents;
10769 bfd_put_32 (htab->elf.dynobj, val, p);
10770
10771 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10772 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10773 htab->glink_eh_frame,
10774 htab->glink_eh_frame->contents))
10775 return FALSE;
10776 }
10777
10778 return ret;
10779 }
10780 \f
10781 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10782 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10783 #define TARGET_BIG_SYM powerpc_elf32_vec
10784 #define TARGET_BIG_NAME "elf32-powerpc"
10785 #define ELF_ARCH bfd_arch_powerpc
10786 #define ELF_TARGET_ID PPC32_ELF_DATA
10787 #define ELF_MACHINE_CODE EM_PPC
10788 #ifdef __QNXTARGET__
10789 #define ELF_MAXPAGESIZE 0x1000
10790 #define ELF_COMMONPAGESIZE 0x1000
10791 #else
10792 #define ELF_MAXPAGESIZE 0x10000
10793 #define ELF_COMMONPAGESIZE 0x10000
10794 #endif
10795 #define ELF_MINPAGESIZE 0x1000
10796 #define elf_info_to_howto ppc_elf_info_to_howto
10797
10798 #ifdef EM_CYGNUS_POWERPC
10799 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10800 #endif
10801
10802 #ifdef EM_PPC_OLD
10803 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10804 #endif
10805
10806 #define elf_backend_plt_not_loaded 1
10807 #define elf_backend_want_dynrelro 1
10808 #define elf_backend_can_gc_sections 1
10809 #define elf_backend_can_refcount 1
10810 #define elf_backend_rela_normal 1
10811 #define elf_backend_caches_rawsize 1
10812
10813 #define bfd_elf32_mkobject ppc_elf_mkobject
10814 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10815 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10816 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10817 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10818 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10819 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10820 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10821
10822 #define elf_backend_object_p ppc_elf_object_p
10823 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10824 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10825 #define elf_backend_relocate_section ppc_elf_relocate_section
10826 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10827 #define elf_backend_check_relocs ppc_elf_check_relocs
10828 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
10829 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10830 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10831 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10832 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10833 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10834 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10835 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10836 #define elf_backend_fake_sections ppc_elf_fake_sections
10837 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10838 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10839 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10840 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10841 #define elf_backend_write_core_note ppc_elf_write_core_note
10842 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10843 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10844 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10845 #define elf_backend_write_section ppc_elf_write_section
10846 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10847 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10848 #define elf_backend_action_discarded ppc_elf_action_discarded
10849 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10850 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10851
10852 #include "elf32-target.h"
10853
10854 /* FreeBSD Target */
10855
10856 #undef TARGET_LITTLE_SYM
10857 #undef TARGET_LITTLE_NAME
10858
10859 #undef TARGET_BIG_SYM
10860 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10861 #undef TARGET_BIG_NAME
10862 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10863
10864 #undef ELF_OSABI
10865 #define ELF_OSABI ELFOSABI_FREEBSD
10866
10867 #undef elf32_bed
10868 #define elf32_bed elf32_powerpc_fbsd_bed
10869
10870 #include "elf32-target.h"
10871
10872 /* VxWorks Target */
10873
10874 #undef TARGET_LITTLE_SYM
10875 #undef TARGET_LITTLE_NAME
10876
10877 #undef TARGET_BIG_SYM
10878 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10879 #undef TARGET_BIG_NAME
10880 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10881
10882 #undef ELF_OSABI
10883
10884 /* VxWorks uses the elf default section flags for .plt. */
10885 static const struct bfd_elf_special_section *
10886 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
10887 {
10888 if (sec->name == NULL)
10889 return NULL;
10890
10891 if (strcmp (sec->name, ".plt") == 0)
10892 return _bfd_elf_get_sec_type_attr (abfd, sec);
10893
10894 return ppc_elf_get_sec_type_attr (abfd, sec);
10895 }
10896
10897 /* Like ppc_elf_link_hash_table_create, but overrides
10898 appropriately for VxWorks. */
10899 static struct bfd_link_hash_table *
10900 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10901 {
10902 struct bfd_link_hash_table *ret;
10903
10904 ret = ppc_elf_link_hash_table_create (abfd);
10905 if (ret)
10906 {
10907 struct ppc_elf_link_hash_table *htab
10908 = (struct ppc_elf_link_hash_table *)ret;
10909 htab->is_vxworks = 1;
10910 htab->plt_type = PLT_VXWORKS;
10911 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10912 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10913 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10914 }
10915 return ret;
10916 }
10917
10918 /* Tweak magic VxWorks symbols as they are loaded. */
10919 static bfd_boolean
10920 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10921 struct bfd_link_info *info,
10922 Elf_Internal_Sym *sym,
10923 const char **namep,
10924 flagword *flagsp,
10925 asection **secp,
10926 bfd_vma *valp)
10927 {
10928 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
10929 valp))
10930 return FALSE;
10931
10932 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
10933 }
10934
10935 static void
10936 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10937 {
10938 ppc_elf_final_write_processing (abfd, linker);
10939 elf_vxworks_final_write_processing (abfd, linker);
10940 }
10941
10942 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10943 define it. */
10944 #undef elf_backend_want_plt_sym
10945 #define elf_backend_want_plt_sym 1
10946 #undef elf_backend_want_got_plt
10947 #define elf_backend_want_got_plt 1
10948 #undef elf_backend_got_symbol_offset
10949 #define elf_backend_got_symbol_offset 0
10950 #undef elf_backend_plt_not_loaded
10951 #define elf_backend_plt_not_loaded 0
10952 #undef elf_backend_plt_readonly
10953 #define elf_backend_plt_readonly 1
10954 #undef elf_backend_got_header_size
10955 #define elf_backend_got_header_size 12
10956 #undef elf_backend_dtrel_excludes_plt
10957 #define elf_backend_dtrel_excludes_plt 1
10958
10959 #undef bfd_elf32_get_synthetic_symtab
10960
10961 #undef bfd_elf32_bfd_link_hash_table_create
10962 #define bfd_elf32_bfd_link_hash_table_create \
10963 ppc_elf_vxworks_link_hash_table_create
10964 #undef elf_backend_add_symbol_hook
10965 #define elf_backend_add_symbol_hook \
10966 ppc_elf_vxworks_add_symbol_hook
10967 #undef elf_backend_link_output_symbol_hook
10968 #define elf_backend_link_output_symbol_hook \
10969 elf_vxworks_link_output_symbol_hook
10970 #undef elf_backend_final_write_processing
10971 #define elf_backend_final_write_processing \
10972 ppc_elf_vxworks_final_write_processing
10973 #undef elf_backend_get_sec_type_attr
10974 #define elf_backend_get_sec_type_attr \
10975 ppc_elf_vxworks_get_sec_type_attr
10976 #undef elf_backend_emit_relocs
10977 #define elf_backend_emit_relocs \
10978 elf_vxworks_emit_relocs
10979
10980 #undef elf32_bed
10981 #define elf32_bed ppc_elf_vxworks_bed
10982 #undef elf_backend_post_process_headers
10983
10984 #include "elf32-target.h"
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