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ELF: Don't set non_ir_ref_regular in check_relocs
[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
4004 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4005 This shows up in particular in an R_PPC_ADDR32 in the eabi
4006 startup code. */
4007 if (h != NULL
4008 && htab->elf.sgot == NULL
4009 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4010 {
4011 if (htab->elf.dynobj == NULL)
4012 htab->elf.dynobj = abfd;
4013 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4014 return FALSE;
4015 BFD_ASSERT (h == htab->elf.hgot);
4016 }
4017
4018 tls_type = 0;
4019 r_type = ELF32_R_TYPE (rel->r_info);
4020 ifunc = NULL;
4021 if (h == NULL && !htab->is_vxworks)
4022 {
4023 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4024 abfd, r_symndx);
4025 if (isym == NULL)
4026 return FALSE;
4027
4028 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4029 {
4030 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4031 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4032 PLT_IFUNC);
4033 if (ifunc == NULL)
4034 return FALSE;
4035
4036 /* STT_GNU_IFUNC symbols must have a PLT entry;
4037 In a non-pie executable even when there are
4038 no plt calls. */
4039 if (!bfd_link_pic (info)
4040 || is_branch_reloc (r_type))
4041 {
4042 bfd_vma addend = 0;
4043 if (r_type == R_PPC_PLTREL24)
4044 {
4045 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4046 if (bfd_link_pic (info))
4047 addend = rel->r_addend;
4048 }
4049 if (!update_plt_info (abfd, ifunc, got2, addend))
4050 return FALSE;
4051 }
4052 }
4053 }
4054
4055 if (!htab->is_vxworks
4056 && is_branch_reloc (r_type)
4057 && h != NULL
4058 && h == tga)
4059 {
4060 if (rel != relocs
4061 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4062 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4063 /* We have a new-style __tls_get_addr call with a marker
4064 reloc. */
4065 ;
4066 else
4067 /* Mark this section as having an old-style call. */
4068 sec->has_tls_get_addr_call = 1;
4069 }
4070
4071 switch (r_type)
4072 {
4073 case R_PPC_TLSGD:
4074 case R_PPC_TLSLD:
4075 /* These special tls relocs tie a call to __tls_get_addr with
4076 its parameter symbol. */
4077 break;
4078
4079 case R_PPC_GOT_TLSLD16:
4080 case R_PPC_GOT_TLSLD16_LO:
4081 case R_PPC_GOT_TLSLD16_HI:
4082 case R_PPC_GOT_TLSLD16_HA:
4083 tls_type = TLS_TLS | TLS_LD;
4084 goto dogottls;
4085
4086 case R_PPC_GOT_TLSGD16:
4087 case R_PPC_GOT_TLSGD16_LO:
4088 case R_PPC_GOT_TLSGD16_HI:
4089 case R_PPC_GOT_TLSGD16_HA:
4090 tls_type = TLS_TLS | TLS_GD;
4091 goto dogottls;
4092
4093 case R_PPC_GOT_TPREL16:
4094 case R_PPC_GOT_TPREL16_LO:
4095 case R_PPC_GOT_TPREL16_HI:
4096 case R_PPC_GOT_TPREL16_HA:
4097 if (bfd_link_dll (info))
4098 info->flags |= DF_STATIC_TLS;
4099 tls_type = TLS_TLS | TLS_TPREL;
4100 goto dogottls;
4101
4102 case R_PPC_GOT_DTPREL16:
4103 case R_PPC_GOT_DTPREL16_LO:
4104 case R_PPC_GOT_DTPREL16_HI:
4105 case R_PPC_GOT_DTPREL16_HA:
4106 tls_type = TLS_TLS | TLS_DTPREL;
4107 dogottls:
4108 sec->has_tls_reloc = 1;
4109 /* Fall through. */
4110
4111 /* GOT16 relocations */
4112 case R_PPC_GOT16:
4113 case R_PPC_GOT16_LO:
4114 case R_PPC_GOT16_HI:
4115 case R_PPC_GOT16_HA:
4116 /* This symbol requires a global offset table entry. */
4117 if (htab->elf.sgot == NULL)
4118 {
4119 if (htab->elf.dynobj == NULL)
4120 htab->elf.dynobj = abfd;
4121 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4122 return FALSE;
4123 }
4124 if (h != NULL)
4125 {
4126 h->got.refcount += 1;
4127 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4128 }
4129 else
4130 /* This is a global offset table entry for a local symbol. */
4131 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4132 return FALSE;
4133
4134 /* We may also need a plt entry if the symbol turns out to be
4135 an ifunc. */
4136 if (h != NULL && !bfd_link_pic (info))
4137 {
4138 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4139 return FALSE;
4140 }
4141 break;
4142
4143 /* Indirect .sdata relocation. */
4144 case R_PPC_EMB_SDAI16:
4145 if (bfd_link_pic (info))
4146 {
4147 bad_shared_reloc (abfd, r_type);
4148 return FALSE;
4149 }
4150 htab->sdata[0].sym->ref_regular = 1;
4151 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4152 h, rel))
4153 return FALSE;
4154 if (h != NULL)
4155 {
4156 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4157 h->non_got_ref = TRUE;
4158 }
4159 break;
4160
4161 /* Indirect .sdata2 relocation. */
4162 case R_PPC_EMB_SDA2I16:
4163 if (bfd_link_pic (info))
4164 {
4165 bad_shared_reloc (abfd, r_type);
4166 return FALSE;
4167 }
4168 htab->sdata[1].sym->ref_regular = 1;
4169 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4170 h, rel))
4171 return FALSE;
4172 if (h != NULL)
4173 {
4174 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4175 h->non_got_ref = TRUE;
4176 }
4177 break;
4178
4179 case R_PPC_SDAREL16:
4180 htab->sdata[0].sym->ref_regular = 1;
4181 /* Fall through. */
4182
4183 case R_PPC_VLE_SDAREL_LO16A:
4184 case R_PPC_VLE_SDAREL_LO16D:
4185 case R_PPC_VLE_SDAREL_HI16A:
4186 case R_PPC_VLE_SDAREL_HI16D:
4187 case R_PPC_VLE_SDAREL_HA16A:
4188 case R_PPC_VLE_SDAREL_HA16D:
4189 if (h != NULL)
4190 {
4191 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4192 h->non_got_ref = TRUE;
4193 }
4194 break;
4195
4196 case R_PPC_VLE_REL8:
4197 case R_PPC_VLE_REL15:
4198 case R_PPC_VLE_REL24:
4199 case R_PPC_VLE_LO16A:
4200 case R_PPC_VLE_LO16D:
4201 case R_PPC_VLE_HI16A:
4202 case R_PPC_VLE_HI16D:
4203 case R_PPC_VLE_HA16A:
4204 case R_PPC_VLE_HA16D:
4205 case R_PPC_VLE_ADDR20:
4206 break;
4207
4208 case R_PPC_EMB_SDA2REL:
4209 if (bfd_link_pic (info))
4210 {
4211 bad_shared_reloc (abfd, r_type);
4212 return FALSE;
4213 }
4214 htab->sdata[1].sym->ref_regular = 1;
4215 if (h != NULL)
4216 {
4217 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4218 h->non_got_ref = TRUE;
4219 }
4220 break;
4221
4222 case R_PPC_VLE_SDA21_LO:
4223 case R_PPC_VLE_SDA21:
4224 case R_PPC_EMB_SDA21:
4225 case R_PPC_EMB_RELSDA:
4226 if (bfd_link_pic (info))
4227 {
4228 bad_shared_reloc (abfd, r_type);
4229 return FALSE;
4230 }
4231 if (h != NULL)
4232 {
4233 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4234 h->non_got_ref = TRUE;
4235 }
4236 break;
4237
4238 case R_PPC_EMB_NADDR32:
4239 case R_PPC_EMB_NADDR16:
4240 case R_PPC_EMB_NADDR16_LO:
4241 case R_PPC_EMB_NADDR16_HI:
4242 case R_PPC_EMB_NADDR16_HA:
4243 if (bfd_link_pic (info))
4244 {
4245 bad_shared_reloc (abfd, r_type);
4246 return FALSE;
4247 }
4248 if (h != NULL)
4249 h->non_got_ref = TRUE;
4250 break;
4251
4252 case R_PPC_PLTREL24:
4253 if (h == NULL)
4254 break;
4255 /* Fall through */
4256 case R_PPC_PLT32:
4257 case R_PPC_PLTREL32:
4258 case R_PPC_PLT16_LO:
4259 case R_PPC_PLT16_HI:
4260 case R_PPC_PLT16_HA:
4261 #ifdef DEBUG
4262 fprintf (stderr, "Reloc requires a PLT entry\n");
4263 #endif
4264 /* This symbol requires a procedure linkage table entry. */
4265 if (h == NULL)
4266 {
4267 if (ifunc == NULL)
4268 {
4269 /* It does not make sense to have a procedure linkage
4270 table entry for a non-ifunc local symbol. */
4271 info->callbacks->einfo
4272 /* xgettext:c-format */
4273 (_("%H: %s reloc against local symbol\n"),
4274 abfd, sec, rel->r_offset,
4275 ppc_elf_howto_table[r_type]->name);
4276 bfd_set_error (bfd_error_bad_value);
4277 return FALSE;
4278 }
4279 }
4280 else
4281 {
4282 bfd_vma addend = 0;
4283
4284 if (r_type == R_PPC_PLTREL24)
4285 {
4286 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4287 if (bfd_link_pic (info))
4288 addend = rel->r_addend;
4289 }
4290 h->needs_plt = 1;
4291 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4292 return FALSE;
4293 }
4294 break;
4295
4296 /* The following relocations don't need to propagate the
4297 relocation if linking a shared object since they are
4298 section relative. */
4299 case R_PPC_SECTOFF:
4300 case R_PPC_SECTOFF_LO:
4301 case R_PPC_SECTOFF_HI:
4302 case R_PPC_SECTOFF_HA:
4303 case R_PPC_DTPREL16:
4304 case R_PPC_DTPREL16_LO:
4305 case R_PPC_DTPREL16_HI:
4306 case R_PPC_DTPREL16_HA:
4307 case R_PPC_TOC16:
4308 break;
4309
4310 case R_PPC_REL16:
4311 case R_PPC_REL16_LO:
4312 case R_PPC_REL16_HI:
4313 case R_PPC_REL16_HA:
4314 case R_PPC_REL16DX_HA:
4315 ppc_elf_tdata (abfd)->has_rel16 = 1;
4316 break;
4317
4318 /* These are just markers. */
4319 case R_PPC_TLS:
4320 case R_PPC_EMB_MRKREF:
4321 case R_PPC_NONE:
4322 case R_PPC_max:
4323 case R_PPC_RELAX:
4324 case R_PPC_RELAX_PLT:
4325 case R_PPC_RELAX_PLTREL24:
4326 case R_PPC_16DX_HA:
4327 break;
4328
4329 /* These should only appear in dynamic objects. */
4330 case R_PPC_COPY:
4331 case R_PPC_GLOB_DAT:
4332 case R_PPC_JMP_SLOT:
4333 case R_PPC_RELATIVE:
4334 case R_PPC_IRELATIVE:
4335 break;
4336
4337 /* These aren't handled yet. We'll report an error later. */
4338 case R_PPC_ADDR30:
4339 case R_PPC_EMB_RELSEC16:
4340 case R_PPC_EMB_RELST_LO:
4341 case R_PPC_EMB_RELST_HI:
4342 case R_PPC_EMB_RELST_HA:
4343 case R_PPC_EMB_BIT_FLD:
4344 break;
4345
4346 /* This refers only to functions defined in the shared library. */
4347 case R_PPC_LOCAL24PC:
4348 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4349 {
4350 htab->plt_type = PLT_OLD;
4351 htab->old_bfd = abfd;
4352 }
4353 if (h != NULL && h->type == STT_GNU_IFUNC)
4354 {
4355 h->needs_plt = 1;
4356 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4357 return FALSE;
4358 }
4359 break;
4360
4361 /* This relocation describes the C++ object vtable hierarchy.
4362 Reconstruct it for later use during GC. */
4363 case R_PPC_GNU_VTINHERIT:
4364 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4365 return FALSE;
4366 break;
4367
4368 /* This relocation describes which C++ vtable entries are actually
4369 used. Record for later use during GC. */
4370 case R_PPC_GNU_VTENTRY:
4371 BFD_ASSERT (h != NULL);
4372 if (h != NULL
4373 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4374 return FALSE;
4375 break;
4376
4377 /* We shouldn't really be seeing TPREL32. */
4378 case R_PPC_TPREL32:
4379 case R_PPC_TPREL16:
4380 case R_PPC_TPREL16_LO:
4381 case R_PPC_TPREL16_HI:
4382 case R_PPC_TPREL16_HA:
4383 if (bfd_link_dll (info))
4384 info->flags |= DF_STATIC_TLS;
4385 goto dodyn;
4386
4387 /* Nor these. */
4388 case R_PPC_DTPMOD32:
4389 case R_PPC_DTPREL32:
4390 goto dodyn;
4391
4392 case R_PPC_REL32:
4393 if (h == NULL
4394 && got2 != NULL
4395 && (sec->flags & SEC_CODE) != 0
4396 && bfd_link_pic (info)
4397 && htab->plt_type == PLT_UNSET)
4398 {
4399 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4400 the start of a function, which assembles to a REL32
4401 reference to .got2. If we detect one of these, then
4402 force the old PLT layout because the linker cannot
4403 reliably deduce the GOT pointer value needed for
4404 PLT call stubs. */
4405 asection *s;
4406 Elf_Internal_Sym *isym;
4407
4408 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4409 abfd, r_symndx);
4410 if (isym == NULL)
4411 return FALSE;
4412
4413 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4414 if (s == got2)
4415 {
4416 htab->plt_type = PLT_OLD;
4417 htab->old_bfd = abfd;
4418 }
4419 }
4420 if (h == NULL || h == htab->elf.hgot)
4421 break;
4422 /* fall through */
4423
4424 case R_PPC_ADDR32:
4425 case R_PPC_ADDR16:
4426 case R_PPC_ADDR16_LO:
4427 case R_PPC_ADDR16_HI:
4428 case R_PPC_ADDR16_HA:
4429 case R_PPC_UADDR32:
4430 case R_PPC_UADDR16:
4431 if (h != NULL && !bfd_link_pic (info))
4432 {
4433 /* We may need a plt entry if the symbol turns out to be
4434 a function defined in a dynamic object. */
4435 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4436 return FALSE;
4437
4438 /* We may need a copy reloc too. */
4439 h->non_got_ref = 1;
4440 h->pointer_equality_needed = 1;
4441 if (r_type == R_PPC_ADDR16_HA)
4442 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4443 if (r_type == R_PPC_ADDR16_LO)
4444 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4445 }
4446 goto dodyn;
4447
4448 case R_PPC_REL24:
4449 case R_PPC_REL14:
4450 case R_PPC_REL14_BRTAKEN:
4451 case R_PPC_REL14_BRNTAKEN:
4452 if (h == NULL)
4453 break;
4454 if (h == htab->elf.hgot)
4455 {
4456 if (htab->plt_type == PLT_UNSET)
4457 {
4458 htab->plt_type = PLT_OLD;
4459 htab->old_bfd = abfd;
4460 }
4461 break;
4462 }
4463 /* fall through */
4464
4465 case R_PPC_ADDR24:
4466 case R_PPC_ADDR14:
4467 case R_PPC_ADDR14_BRTAKEN:
4468 case R_PPC_ADDR14_BRNTAKEN:
4469 if (h != NULL && !bfd_link_pic (info))
4470 {
4471 /* We may need a plt entry if the symbol turns out to be
4472 a function defined in a dynamic object. */
4473 h->needs_plt = 1;
4474 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4475 return FALSE;
4476 break;
4477 }
4478
4479 dodyn:
4480 /* If we are creating a shared library, and this is a reloc
4481 against a global symbol, or a non PC relative reloc
4482 against a local symbol, then we need to copy the reloc
4483 into the shared library. However, if we are linking with
4484 -Bsymbolic, we do not need to copy a reloc against a
4485 global symbol which is defined in an object we are
4486 including in the link (i.e., DEF_REGULAR is set). At
4487 this point we have not seen all the input files, so it is
4488 possible that DEF_REGULAR is not set now but will be set
4489 later (it is never cleared). In case of a weak definition,
4490 DEF_REGULAR may be cleared later by a strong definition in
4491 a shared library. We account for that possibility below by
4492 storing information in the dyn_relocs field of the hash
4493 table entry. A similar situation occurs when creating
4494 shared libraries and symbol visibility changes render the
4495 symbol local.
4496
4497 If on the other hand, we are creating an executable, we
4498 may need to keep relocations for symbols satisfied by a
4499 dynamic library if we manage to avoid copy relocs for the
4500 symbol. */
4501 if ((bfd_link_pic (info)
4502 && (must_be_dyn_reloc (info, r_type)
4503 || (h != NULL
4504 && (!SYMBOLIC_BIND (info, h)
4505 || h->root.type == bfd_link_hash_defweak
4506 || !h->def_regular))))
4507 || (ELIMINATE_COPY_RELOCS
4508 && !bfd_link_pic (info)
4509 && h != NULL
4510 && (h->root.type == bfd_link_hash_defweak
4511 || !h->def_regular)))
4512 {
4513 #ifdef DEBUG
4514 fprintf (stderr,
4515 "ppc_elf_check_relocs needs to "
4516 "create relocation for %s\n",
4517 (h && h->root.root.string
4518 ? h->root.root.string : "<unknown>"));
4519 #endif
4520 if (sreloc == NULL)
4521 {
4522 if (htab->elf.dynobj == NULL)
4523 htab->elf.dynobj = abfd;
4524
4525 sreloc = _bfd_elf_make_dynamic_reloc_section
4526 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4527
4528 if (sreloc == NULL)
4529 return FALSE;
4530 }
4531
4532 /* If this is a global symbol, we count the number of
4533 relocations we need for this symbol. */
4534 if (h != NULL)
4535 {
4536 struct elf_dyn_relocs *p;
4537 struct elf_dyn_relocs **rel_head;
4538
4539 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4540 p = *rel_head;
4541 if (p == NULL || p->sec != sec)
4542 {
4543 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4544 if (p == NULL)
4545 return FALSE;
4546 p->next = *rel_head;
4547 *rel_head = p;
4548 p->sec = sec;
4549 p->count = 0;
4550 p->pc_count = 0;
4551 }
4552 p->count += 1;
4553 if (!must_be_dyn_reloc (info, r_type))
4554 p->pc_count += 1;
4555 }
4556 else
4557 {
4558 /* Track dynamic relocs needed for local syms too.
4559 We really need local syms available to do this
4560 easily. Oh well. */
4561 struct ppc_dyn_relocs *p;
4562 struct ppc_dyn_relocs **rel_head;
4563 bfd_boolean is_ifunc;
4564 asection *s;
4565 void *vpp;
4566 Elf_Internal_Sym *isym;
4567
4568 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4569 abfd, r_symndx);
4570 if (isym == NULL)
4571 return FALSE;
4572
4573 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4574 if (s == NULL)
4575 s = sec;
4576
4577 vpp = &elf_section_data (s)->local_dynrel;
4578 rel_head = (struct ppc_dyn_relocs **) vpp;
4579 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4580 p = *rel_head;
4581 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4582 p = p->next;
4583 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4584 {
4585 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4586 if (p == NULL)
4587 return FALSE;
4588 p->next = *rel_head;
4589 *rel_head = p;
4590 p->sec = sec;
4591 p->ifunc = is_ifunc;
4592 p->count = 0;
4593 }
4594 p->count += 1;
4595 }
4596 }
4597
4598 break;
4599 }
4600 }
4601
4602 return TRUE;
4603 }
4604 \f
4605 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4606 and OBFD, and merge non-conflicting ones. */
4607 void
4608 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4609 {
4610 bfd *obfd = info->output_bfd;
4611 obj_attribute *in_attr, *in_attrs;
4612 obj_attribute *out_attr, *out_attrs;
4613
4614 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4615 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4616
4617 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4618 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4619
4620 if (in_attr->i != out_attr->i)
4621 {
4622 int in_fp = in_attr->i & 3;
4623 int out_fp = out_attr->i & 3;
4624
4625 if (in_fp == 0)
4626 ;
4627 else if (out_fp == 0)
4628 {
4629 out_attr->type = 1;
4630 out_attr->i ^= in_fp;
4631 }
4632 else if (out_fp != 2 && in_fp == 2)
4633 _bfd_error_handler
4634 /* xgettext:c-format */
4635 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
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"), ibfd, obfd);
4640 else if (out_fp == 1 && in_fp == 3)
4641 _bfd_error_handler
4642 /* xgettext:c-format */
4643 (_("Warning: %B uses double-precision hard float, "
4644 "%B uses single-precision hard float"), obfd, ibfd);
4645 else if (out_fp == 3 && in_fp == 1)
4646 _bfd_error_handler
4647 /* xgettext:c-format */
4648 (_("Warning: %B uses double-precision hard float, "
4649 "%B uses single-precision hard float"), ibfd, obfd);
4650
4651 in_fp = in_attr->i & 0xc;
4652 out_fp = out_attr->i & 0xc;
4653 if (in_fp == 0)
4654 ;
4655 else if (out_fp == 0)
4656 {
4657 out_attr->type = 1;
4658 out_attr->i ^= in_fp;
4659 }
4660 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4661 _bfd_error_handler
4662 /* xgettext:c-format */
4663 (_("Warning: %B uses 64-bit long double, "
4664 "%B uses 128-bit long double"), ibfd, obfd);
4665 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4666 _bfd_error_handler
4667 /* xgettext:c-format */
4668 (_("Warning: %B uses 64-bit long double, "
4669 "%B uses 128-bit long double"), obfd, ibfd);
4670 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4671 _bfd_error_handler
4672 /* xgettext:c-format */
4673 (_("Warning: %B uses IBM long double, "
4674 "%B uses IEEE long double"), ibfd, obfd);
4675 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4676 _bfd_error_handler
4677 /* xgettext:c-format */
4678 (_("Warning: %B uses IBM long double, "
4679 "%B uses IEEE long double"), obfd, ibfd);
4680 }
4681 }
4682
4683 /* Merge object attributes from IBFD into OBFD. Warn if
4684 there are conflicting attributes. */
4685 static bfd_boolean
4686 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4687 {
4688 bfd *obfd;
4689 obj_attribute *in_attr, *in_attrs;
4690 obj_attribute *out_attr, *out_attrs;
4691
4692 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4693
4694 obfd = info->output_bfd;
4695 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4696 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4697
4698 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4699 merge non-conflicting ones. */
4700 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4701 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4702 if (in_attr->i != out_attr->i)
4703 {
4704 int in_vec = in_attr->i & 3;
4705 int out_vec = out_attr->i & 3;
4706
4707 if (in_vec == 0)
4708 ;
4709 else if (out_vec == 0)
4710 {
4711 out_attr->type = 1;
4712 out_attr->i = in_vec;
4713 }
4714 /* For now, allow generic to transition to AltiVec or SPE
4715 without a warning. If GCC marked files with their stack
4716 alignment and used don't-care markings for files which are
4717 not affected by the vector ABI, we could warn about this
4718 case too. */
4719 else if (in_vec == 1)
4720 ;
4721 else if (out_vec == 1)
4722 {
4723 out_attr->type = 1;
4724 out_attr->i = in_vec;
4725 }
4726 else if (out_vec < in_vec)
4727 _bfd_error_handler
4728 /* xgettext:c-format */
4729 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4730 obfd, ibfd);
4731 else if (out_vec > in_vec)
4732 _bfd_error_handler
4733 /* xgettext:c-format */
4734 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4735 ibfd, obfd);
4736 }
4737
4738 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4739 and merge non-conflicting ones. */
4740 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4741 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4742 if (in_attr->i != out_attr->i)
4743 {
4744 int in_struct = in_attr->i & 3;
4745 int out_struct = out_attr->i & 3;
4746
4747 if (in_struct == 0 || in_struct == 3)
4748 ;
4749 else if (out_struct == 0)
4750 {
4751 out_attr->type = 1;
4752 out_attr->i = in_struct;
4753 }
4754 else if (out_struct < in_struct)
4755 _bfd_error_handler
4756 /* xgettext:c-format */
4757 (_("Warning: %B uses r3/r4 for small structure returns, "
4758 "%B uses memory"), obfd, ibfd);
4759 else if (out_struct > in_struct)
4760 _bfd_error_handler
4761 /* xgettext:c-format */
4762 (_("Warning: %B uses r3/r4 for small structure returns, "
4763 "%B uses memory"), ibfd, obfd);
4764 }
4765
4766 /* Merge Tag_compatibility attributes and any common GNU ones. */
4767 _bfd_elf_merge_object_attributes (ibfd, info);
4768
4769 return TRUE;
4770 }
4771
4772 /* Merge backend specific data from an object file to the output
4773 object file when linking. */
4774
4775 static bfd_boolean
4776 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4777 {
4778 bfd *obfd = info->output_bfd;
4779 flagword old_flags;
4780 flagword new_flags;
4781 bfd_boolean error;
4782
4783 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4784 return TRUE;
4785
4786 /* Check if we have the same endianness. */
4787 if (! _bfd_generic_verify_endian_match (ibfd, info))
4788 return FALSE;
4789
4790 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4791 return FALSE;
4792
4793 new_flags = elf_elfheader (ibfd)->e_flags;
4794 old_flags = elf_elfheader (obfd)->e_flags;
4795 if (!elf_flags_init (obfd))
4796 {
4797 /* First call, no flags set. */
4798 elf_flags_init (obfd) = TRUE;
4799 elf_elfheader (obfd)->e_flags = new_flags;
4800 }
4801
4802 /* Compatible flags are ok. */
4803 else if (new_flags == old_flags)
4804 ;
4805
4806 /* Incompatible flags. */
4807 else
4808 {
4809 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4810 to be linked with either. */
4811 error = FALSE;
4812 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4813 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4814 {
4815 error = TRUE;
4816 _bfd_error_handler
4817 (_("%B: compiled with -mrelocatable and linked with "
4818 "modules compiled normally"), ibfd);
4819 }
4820 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4821 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4822 {
4823 error = TRUE;
4824 _bfd_error_handler
4825 (_("%B: compiled normally and linked with "
4826 "modules compiled with -mrelocatable"), ibfd);
4827 }
4828
4829 /* The output is -mrelocatable-lib iff both the input files are. */
4830 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4831 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4832
4833 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4834 but each input file is either -mrelocatable or -mrelocatable-lib. */
4835 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4836 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4837 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4838 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4839
4840 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4841 any module uses it. */
4842 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4843
4844 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4845 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4846
4847 /* Warn about any other mismatches. */
4848 if (new_flags != old_flags)
4849 {
4850 error = TRUE;
4851 _bfd_error_handler
4852 /* xgettext:c-format */
4853 (_("%B: uses different e_flags (%#x) fields "
4854 "than previous modules (%#x)"),
4855 ibfd, new_flags, old_flags);
4856 }
4857
4858 if (error)
4859 {
4860 bfd_set_error (bfd_error_bad_value);
4861 return FALSE;
4862 }
4863 }
4864
4865 return TRUE;
4866 }
4867
4868 static void
4869 ppc_elf_vle_split16 (bfd *input_bfd,
4870 asection *input_section,
4871 unsigned long offset,
4872 bfd_byte *loc,
4873 bfd_vma value,
4874 split16_format_type split16_format,
4875 bfd_boolean fixup)
4876 {
4877 unsigned int insn, opcode, top5;
4878
4879 insn = bfd_get_32 (input_bfd, loc);
4880 opcode = insn & 0xfc00f800;
4881 if (opcode == E_OR2I_INSN
4882 || opcode == E_AND2I_DOT_INSN
4883 || opcode == E_OR2IS_INSN
4884 || opcode == E_LIS_INSN
4885 || opcode == E_AND2IS_DOT_INSN)
4886 {
4887 if (split16_format != split16a_type)
4888 {
4889 if (fixup)
4890 split16_format = split16a_type;
4891 else
4892 _bfd_error_handler
4893 /* xgettext:c-format */
4894 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4895 input_bfd, input_section, offset, opcode);
4896 }
4897 }
4898 else if (opcode == E_ADD2I_DOT_INSN
4899 || opcode == E_ADD2IS_INSN
4900 || opcode == E_CMP16I_INSN
4901 || opcode == E_MULL2I_INSN
4902 || opcode == E_CMPL16I_INSN
4903 || opcode == E_CMPH16I_INSN
4904 || opcode == E_CMPHL16I_INSN)
4905 {
4906 if (split16_format != split16d_type)
4907 {
4908 if (fixup)
4909 split16_format = split16d_type;
4910 else
4911 _bfd_error_handler
4912 /* xgettext:c-format */
4913 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4914 input_bfd, input_section, offset, opcode);
4915 }
4916 }
4917 top5 = value & 0xf800;
4918 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
4919 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
4920 insn |= top5;
4921 insn |= value & 0x7ff;
4922 bfd_put_32 (input_bfd, insn, loc);
4923 }
4924
4925 static void
4926 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
4927 {
4928 unsigned int insn;
4929
4930 insn = bfd_get_32 (output_bfd, loc);
4931 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
4932 /* Top 4 bits of value to 17..20. */
4933 insn |= (value & 0xf0000) >> 5;
4934 /* Next 5 bits of the value to 11..15. */
4935 insn |= (value & 0xf800) << 5;
4936 /* And the final 11 bits of the value to bits 21 to 31. */
4937 insn |= value & 0x7ff;
4938 bfd_put_32 (output_bfd, insn, loc);
4939 }
4940
4941 \f
4942 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4943 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4944 int
4945 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4946 struct bfd_link_info *info)
4947 {
4948 struct ppc_elf_link_hash_table *htab;
4949 flagword flags;
4950
4951 htab = ppc_elf_hash_table (info);
4952
4953 if (htab->plt_type == PLT_UNSET)
4954 {
4955 struct elf_link_hash_entry *h;
4956
4957 if (htab->params->plt_style == PLT_OLD)
4958 htab->plt_type = PLT_OLD;
4959 else if (bfd_link_pic (info)
4960 && htab->elf.dynamic_sections_created
4961 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4962 FALSE, FALSE, TRUE)) != NULL
4963 && (h->type == STT_FUNC
4964 || h->needs_plt)
4965 && h->ref_regular
4966 && !(SYMBOL_CALLS_LOCAL (info, h)
4967 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
4968 {
4969 /* Profiling of shared libs (and pies) is not supported with
4970 secure plt, because ppc32 does profiling before a
4971 function prologue and a secure plt pic call stubs needs
4972 r30 to be set up. */
4973 htab->plt_type = PLT_OLD;
4974 }
4975 else
4976 {
4977 bfd *ibfd;
4978 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4979
4980 /* Look through the reloc flags left by ppc_elf_check_relocs.
4981 Use the old style bss plt if a file makes plt calls
4982 without using the new relocs, and if ld isn't given
4983 --secure-plt and we never see REL16 relocs. */
4984 if (plt_type == PLT_UNSET)
4985 plt_type = PLT_OLD;
4986 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4987 if (is_ppc_elf (ibfd))
4988 {
4989 if (ppc_elf_tdata (ibfd)->has_rel16)
4990 plt_type = PLT_NEW;
4991 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4992 {
4993 plt_type = PLT_OLD;
4994 htab->old_bfd = ibfd;
4995 break;
4996 }
4997 }
4998 htab->plt_type = plt_type;
4999 }
5000 }
5001 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5002 {
5003 if (htab->old_bfd != NULL)
5004 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5005 htab->old_bfd);
5006 else
5007 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5008 }
5009
5010 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5011
5012 if (htab->plt_type == PLT_NEW)
5013 {
5014 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5015 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5016
5017 /* The new PLT is a loaded section. */
5018 if (htab->elf.splt != NULL
5019 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5020 return -1;
5021
5022 /* The new GOT is not executable. */
5023 if (htab->elf.sgot != NULL
5024 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5025 return -1;
5026 }
5027 else
5028 {
5029 /* Stop an unused .glink section from affecting .text alignment. */
5030 if (htab->glink != NULL
5031 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5032 return -1;
5033 }
5034 return htab->plt_type == PLT_NEW;
5035 }
5036 \f
5037 /* Return the section that should be marked against GC for a given
5038 relocation. */
5039
5040 static asection *
5041 ppc_elf_gc_mark_hook (asection *sec,
5042 struct bfd_link_info *info,
5043 Elf_Internal_Rela *rel,
5044 struct elf_link_hash_entry *h,
5045 Elf_Internal_Sym *sym)
5046 {
5047 if (h != NULL)
5048 switch (ELF32_R_TYPE (rel->r_info))
5049 {
5050 case R_PPC_GNU_VTINHERIT:
5051 case R_PPC_GNU_VTENTRY:
5052 return NULL;
5053 }
5054
5055 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5056 }
5057 \f
5058 /* Set plt output section type, htab->tls_get_addr, and call the
5059 generic ELF tls_setup function. */
5060
5061 asection *
5062 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5063 {
5064 struct ppc_elf_link_hash_table *htab;
5065
5066 htab = ppc_elf_hash_table (info);
5067 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5068 FALSE, FALSE, TRUE);
5069 if (htab->plt_type != PLT_NEW)
5070 htab->params->no_tls_get_addr_opt = TRUE;
5071
5072 if (!htab->params->no_tls_get_addr_opt)
5073 {
5074 struct elf_link_hash_entry *opt, *tga;
5075 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5076 FALSE, FALSE, TRUE);
5077 if (opt != NULL
5078 && (opt->root.type == bfd_link_hash_defined
5079 || opt->root.type == bfd_link_hash_defweak))
5080 {
5081 /* If glibc supports an optimized __tls_get_addr call stub,
5082 signalled by the presence of __tls_get_addr_opt, and we'll
5083 be calling __tls_get_addr via a plt call stub, then
5084 make __tls_get_addr point to __tls_get_addr_opt. */
5085 tga = htab->tls_get_addr;
5086 if (htab->elf.dynamic_sections_created
5087 && tga != NULL
5088 && (tga->type == STT_FUNC
5089 || tga->needs_plt)
5090 && !(SYMBOL_CALLS_LOCAL (info, tga)
5091 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5092 {
5093 struct plt_entry *ent;
5094 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5095 if (ent->plt.refcount > 0)
5096 break;
5097 if (ent != NULL)
5098 {
5099 tga->root.type = bfd_link_hash_indirect;
5100 tga->root.u.i.link = &opt->root;
5101 ppc_elf_copy_indirect_symbol (info, opt, tga);
5102 opt->mark = 1;
5103 if (opt->dynindx != -1)
5104 {
5105 /* Use __tls_get_addr_opt in dynamic relocations. */
5106 opt->dynindx = -1;
5107 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5108 opt->dynstr_index);
5109 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5110 return FALSE;
5111 }
5112 htab->tls_get_addr = opt;
5113 }
5114 }
5115 }
5116 else
5117 htab->params->no_tls_get_addr_opt = TRUE;
5118 }
5119 if (htab->plt_type == PLT_NEW
5120 && htab->elf.splt != NULL
5121 && htab->elf.splt->output_section != NULL)
5122 {
5123 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5124 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5125 }
5126
5127 return _bfd_elf_tls_setup (obfd, info);
5128 }
5129
5130 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5131 HASH. */
5132
5133 static bfd_boolean
5134 branch_reloc_hash_match (const bfd *ibfd,
5135 const Elf_Internal_Rela *rel,
5136 const struct elf_link_hash_entry *hash)
5137 {
5138 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5139 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5140 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5141
5142 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5143 {
5144 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5145 struct elf_link_hash_entry *h;
5146
5147 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5148 while (h->root.type == bfd_link_hash_indirect
5149 || h->root.type == bfd_link_hash_warning)
5150 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5151 if (h == hash)
5152 return TRUE;
5153 }
5154 return FALSE;
5155 }
5156
5157 /* Run through all the TLS relocs looking for optimization
5158 opportunities. */
5159
5160 bfd_boolean
5161 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5162 struct bfd_link_info *info)
5163 {
5164 bfd *ibfd;
5165 asection *sec;
5166 struct ppc_elf_link_hash_table *htab;
5167 int pass;
5168
5169 if (!bfd_link_executable (info))
5170 return TRUE;
5171
5172 htab = ppc_elf_hash_table (info);
5173 if (htab == NULL)
5174 return FALSE;
5175
5176 /* Make two passes through the relocs. First time check that tls
5177 relocs involved in setting up a tls_get_addr call are indeed
5178 followed by such a call. If they are not, don't do any tls
5179 optimization. On the second pass twiddle tls_mask flags to
5180 notify relocate_section that optimization can be done, and
5181 adjust got and plt refcounts. */
5182 for (pass = 0; pass < 2; ++pass)
5183 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5184 {
5185 Elf_Internal_Sym *locsyms = NULL;
5186 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5187 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5188
5189 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5190 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5191 {
5192 Elf_Internal_Rela *relstart, *rel, *relend;
5193 int expecting_tls_get_addr = 0;
5194
5195 /* Read the relocations. */
5196 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5197 info->keep_memory);
5198 if (relstart == NULL)
5199 return FALSE;
5200
5201 relend = relstart + sec->reloc_count;
5202 for (rel = relstart; rel < relend; rel++)
5203 {
5204 enum elf_ppc_reloc_type r_type;
5205 unsigned long r_symndx;
5206 struct elf_link_hash_entry *h = NULL;
5207 char *tls_mask;
5208 char tls_set, tls_clear;
5209 bfd_boolean is_local;
5210 bfd_signed_vma *got_count;
5211
5212 r_symndx = ELF32_R_SYM (rel->r_info);
5213 if (r_symndx >= symtab_hdr->sh_info)
5214 {
5215 struct elf_link_hash_entry **sym_hashes;
5216
5217 sym_hashes = elf_sym_hashes (ibfd);
5218 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5219 while (h->root.type == bfd_link_hash_indirect
5220 || h->root.type == bfd_link_hash_warning)
5221 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5222 }
5223
5224 is_local = FALSE;
5225 if (h == NULL
5226 || !h->def_dynamic)
5227 is_local = TRUE;
5228
5229 r_type = ELF32_R_TYPE (rel->r_info);
5230 /* If this section has old-style __tls_get_addr calls
5231 without marker relocs, then check that each
5232 __tls_get_addr call reloc is preceded by a reloc
5233 that conceivably belongs to the __tls_get_addr arg
5234 setup insn. If we don't find matching arg setup
5235 relocs, don't do any tls optimization. */
5236 if (pass == 0
5237 && sec->has_tls_get_addr_call
5238 && h != NULL
5239 && h == htab->tls_get_addr
5240 && !expecting_tls_get_addr
5241 && is_branch_reloc (r_type))
5242 {
5243 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5244 "TLS optimization disabled\n",
5245 ibfd, sec, rel->r_offset);
5246 if (elf_section_data (sec)->relocs != relstart)
5247 free (relstart);
5248 return TRUE;
5249 }
5250
5251 expecting_tls_get_addr = 0;
5252 switch (r_type)
5253 {
5254 case R_PPC_GOT_TLSLD16:
5255 case R_PPC_GOT_TLSLD16_LO:
5256 expecting_tls_get_addr = 1;
5257 /* Fall through. */
5258
5259 case R_PPC_GOT_TLSLD16_HI:
5260 case R_PPC_GOT_TLSLD16_HA:
5261 /* These relocs should never be against a symbol
5262 defined in a shared lib. Leave them alone if
5263 that turns out to be the case. */
5264 if (!is_local)
5265 continue;
5266
5267 /* LD -> LE */
5268 tls_set = 0;
5269 tls_clear = TLS_LD;
5270 break;
5271
5272 case R_PPC_GOT_TLSGD16:
5273 case R_PPC_GOT_TLSGD16_LO:
5274 expecting_tls_get_addr = 1;
5275 /* Fall through. */
5276
5277 case R_PPC_GOT_TLSGD16_HI:
5278 case R_PPC_GOT_TLSGD16_HA:
5279 if (is_local)
5280 /* GD -> LE */
5281 tls_set = 0;
5282 else
5283 /* GD -> IE */
5284 tls_set = TLS_TLS | TLS_TPRELGD;
5285 tls_clear = TLS_GD;
5286 break;
5287
5288 case R_PPC_GOT_TPREL16:
5289 case R_PPC_GOT_TPREL16_LO:
5290 case R_PPC_GOT_TPREL16_HI:
5291 case R_PPC_GOT_TPREL16_HA:
5292 if (is_local)
5293 {
5294 /* IE -> LE */
5295 tls_set = 0;
5296 tls_clear = TLS_TPREL;
5297 break;
5298 }
5299 else
5300 continue;
5301
5302 case R_PPC_TLSGD:
5303 case R_PPC_TLSLD:
5304 expecting_tls_get_addr = 2;
5305 tls_set = 0;
5306 tls_clear = 0;
5307 break;
5308
5309 default:
5310 continue;
5311 }
5312
5313 if (pass == 0)
5314 {
5315 if (!expecting_tls_get_addr
5316 || (expecting_tls_get_addr == 1
5317 && !sec->has_tls_get_addr_call))
5318 continue;
5319
5320 if (rel + 1 < relend
5321 && branch_reloc_hash_match (ibfd, rel + 1,
5322 htab->tls_get_addr))
5323 continue;
5324
5325 /* Uh oh, we didn't find the expected call. We
5326 could just mark this symbol to exclude it
5327 from tls optimization but it's safer to skip
5328 the entire optimization. */
5329 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5330 "TLS optimization disabled\n"),
5331 ibfd, sec, rel->r_offset);
5332 if (elf_section_data (sec)->relocs != relstart)
5333 free (relstart);
5334 return TRUE;
5335 }
5336
5337 if (expecting_tls_get_addr)
5338 {
5339 struct plt_entry *ent;
5340 bfd_vma addend = 0;
5341
5342 if (bfd_link_pic (info)
5343 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5344 addend = rel[1].r_addend;
5345 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5346 got2, addend);
5347 if (ent != NULL && ent->plt.refcount > 0)
5348 ent->plt.refcount -= 1;
5349
5350 if (expecting_tls_get_addr == 2)
5351 continue;
5352 }
5353
5354 if (h != NULL)
5355 {
5356 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5357 got_count = &h->got.refcount;
5358 }
5359 else
5360 {
5361 bfd_signed_vma *lgot_refs;
5362 struct plt_entry **local_plt;
5363 char *lgot_masks;
5364
5365 if (locsyms == NULL)
5366 {
5367 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5368 if (locsyms == NULL)
5369 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5370 symtab_hdr->sh_info,
5371 0, NULL, NULL, NULL);
5372 if (locsyms == NULL)
5373 {
5374 if (elf_section_data (sec)->relocs != relstart)
5375 free (relstart);
5376 return FALSE;
5377 }
5378 }
5379 lgot_refs = elf_local_got_refcounts (ibfd);
5380 if (lgot_refs == NULL)
5381 abort ();
5382 local_plt = (struct plt_entry **)
5383 (lgot_refs + symtab_hdr->sh_info);
5384 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5385 tls_mask = &lgot_masks[r_symndx];
5386 got_count = &lgot_refs[r_symndx];
5387 }
5388
5389 if (tls_set == 0)
5390 {
5391 /* We managed to get rid of a got entry. */
5392 if (*got_count > 0)
5393 *got_count -= 1;
5394 }
5395
5396 *tls_mask |= tls_set;
5397 *tls_mask &= ~tls_clear;
5398 }
5399
5400 if (elf_section_data (sec)->relocs != relstart)
5401 free (relstart);
5402 }
5403
5404 if (locsyms != NULL
5405 && (symtab_hdr->contents != (unsigned char *) locsyms))
5406 {
5407 if (!info->keep_memory)
5408 free (locsyms);
5409 else
5410 symtab_hdr->contents = (unsigned char *) locsyms;
5411 }
5412 }
5413 htab->do_tls_opt = 1;
5414 return TRUE;
5415 }
5416 \f
5417 /* Find dynamic relocs for H that apply to read-only sections. */
5418
5419 static asection *
5420 readonly_dynrelocs (struct elf_link_hash_entry *h)
5421 {
5422 struct elf_dyn_relocs *p;
5423
5424 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5425 {
5426 asection *s = p->sec->output_section;
5427
5428 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5429 return p->sec;
5430 }
5431 return NULL;
5432 }
5433
5434 /* Return true if we have dynamic relocs against H or any of its weak
5435 aliases, that apply to read-only sections. Cannot be used after
5436 size_dynamic_sections. */
5437
5438 static bfd_boolean
5439 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
5440 {
5441 struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h);
5442 do
5443 {
5444 if (readonly_dynrelocs (&eh->elf))
5445 return TRUE;
5446 eh = ppc_elf_hash_entry (eh->elf.u.alias);
5447 } while (eh != NULL && &eh->elf != h);
5448
5449 return FALSE;
5450 }
5451
5452 /* Return whether H has pc-relative dynamic relocs. */
5453
5454 static bfd_boolean
5455 pc_dynrelocs (struct elf_link_hash_entry *h)
5456 {
5457 struct elf_dyn_relocs *p;
5458
5459 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5460 if (p->pc_count != 0)
5461 return TRUE;
5462 return FALSE;
5463 }
5464
5465 /* Adjust a symbol defined by a dynamic object and referenced by a
5466 regular object. The current definition is in some section of the
5467 dynamic object, but we're not including those sections. We have to
5468 change the definition to something the rest of the link can
5469 understand. */
5470
5471 static bfd_boolean
5472 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5473 struct elf_link_hash_entry *h)
5474 {
5475 struct ppc_elf_link_hash_table *htab;
5476 asection *s;
5477
5478 #ifdef DEBUG
5479 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5480 h->root.root.string);
5481 #endif
5482
5483 /* Make sure we know what is going on here. */
5484 htab = ppc_elf_hash_table (info);
5485 BFD_ASSERT (htab->elf.dynobj != NULL
5486 && (h->needs_plt
5487 || h->type == STT_GNU_IFUNC
5488 || h->is_weakalias
5489 || (h->def_dynamic
5490 && h->ref_regular
5491 && !h->def_regular)));
5492
5493 /* Deal with function syms. */
5494 if (h->type == STT_FUNC
5495 || h->type == STT_GNU_IFUNC
5496 || h->needs_plt)
5497 {
5498 bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, h)
5499 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
5500 /* Discard dyn_relocs when non-pic if we've decided that a
5501 function symbol is local. */
5502 if (!bfd_link_pic (info) && local)
5503 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5504
5505 /* Clear procedure linkage table information for any symbol that
5506 won't need a .plt entry. */
5507 struct plt_entry *ent;
5508 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5509 if (ent->plt.refcount > 0)
5510 break;
5511 if (ent == NULL
5512 || (h->type != STT_GNU_IFUNC && local))
5513 {
5514 /* A PLT entry is not required/allowed when:
5515
5516 1. We are not using ld.so; because then the PLT entry
5517 can't be set up, so we can't use one. In this case,
5518 ppc_elf_adjust_dynamic_symbol won't even be called.
5519
5520 2. GC has rendered the entry unused.
5521
5522 3. We know for certain that a call to this symbol
5523 will go to this object, or will remain undefined. */
5524 h->plt.plist = NULL;
5525 h->needs_plt = 0;
5526 h->pointer_equality_needed = 0;
5527 }
5528 else
5529 {
5530 /* Taking a function's address in a read/write section
5531 doesn't require us to define the function symbol in the
5532 executable on a plt call stub. A dynamic reloc can
5533 be used instead, giving better runtime performance.
5534 (Calls via that function pointer don't need to bounce
5535 through the plt call stub.) Similarly, use a dynamic
5536 reloc for a weak reference when possible, allowing the
5537 resolution of the symbol to be set at load time rather
5538 than link time. */
5539 if ((h->pointer_equality_needed
5540 || (h->non_got_ref
5541 && !h->ref_regular_nonweak
5542 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5543 && !htab->is_vxworks
5544 && !ppc_elf_hash_entry (h)->has_sda_refs
5545 && !readonly_dynrelocs (h))
5546 {
5547 h->pointer_equality_needed = 0;
5548 /* If we haven't seen a branch reloc then we don't need
5549 a plt entry. */
5550 if (!h->needs_plt)
5551 h->plt.plist = NULL;
5552 }
5553 else if (!bfd_link_pic (info))
5554 /* We are going to be defining the function symbol on the
5555 plt stub, so no dyn_relocs needed when non-pic. */
5556 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5557 }
5558 h->protected_def = 0;
5559 /* Function symbols can't have copy relocs. */
5560 return TRUE;
5561 }
5562 else
5563 h->plt.plist = NULL;
5564
5565 /* If this is a weak symbol, and there is a real definition, the
5566 processor independent code will have arranged for us to see the
5567 real definition first, and we can just use the same value. */
5568 if (h->is_weakalias)
5569 {
5570 struct elf_link_hash_entry *def = weakdef (h);
5571 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5572 h->root.u.def.section = def->root.u.def.section;
5573 h->root.u.def.value = def->root.u.def.value;
5574 if (ELIMINATE_COPY_RELOCS)
5575 h->non_got_ref = def->non_got_ref;
5576 return TRUE;
5577 }
5578
5579 /* This is a reference to a symbol defined by a dynamic object which
5580 is not a function. */
5581
5582 /* If we are creating a shared library, we must presume that the
5583 only references to the symbol are via the global offset table.
5584 For such cases we need not do anything here; the relocations will
5585 be handled correctly by relocate_section. */
5586 if (bfd_link_pic (info))
5587 {
5588 h->protected_def = 0;
5589 return TRUE;
5590 }
5591
5592 /* If there are no references to this symbol that do not use the
5593 GOT, we don't need to generate a copy reloc. */
5594 if (!h->non_got_ref)
5595 {
5596 h->protected_def = 0;
5597 return TRUE;
5598 }
5599
5600 /* Protected variables do not work with .dynbss. The copy in
5601 .dynbss won't be used by the shared library with the protected
5602 definition for the variable. Editing to PIC, or text relocations
5603 are preferable to an incorrect program. */
5604 if (h->protected_def)
5605 {
5606 if (ELIMINATE_COPY_RELOCS
5607 && ppc_elf_hash_entry (h)->has_addr16_ha
5608 && ppc_elf_hash_entry (h)->has_addr16_lo
5609 && htab->params->pic_fixup == 0
5610 && info->disable_target_specific_optimizations <= 1)
5611 htab->params->pic_fixup = 1;
5612 return TRUE;
5613 }
5614
5615 /* If -z nocopyreloc was given, we won't generate them either. */
5616 if (info->nocopyreloc)
5617 return TRUE;
5618
5619 /* If we didn't find any dynamic relocs in read-only sections, then
5620 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5621 We can't do this if there are any small data relocations. This
5622 doesn't work on VxWorks, where we can not have dynamic
5623 relocations (other than copy and jump slot relocations) in an
5624 executable. */
5625 if (ELIMINATE_COPY_RELOCS
5626 && !ppc_elf_hash_entry (h)->has_sda_refs
5627 && !htab->is_vxworks
5628 && !h->def_regular
5629 && !alias_readonly_dynrelocs (h))
5630 return TRUE;
5631
5632 /* We must allocate the symbol in our .dynbss section, which will
5633 become part of the .bss section of the executable. There will be
5634 an entry for this symbol in the .dynsym section. The dynamic
5635 object will contain position independent code, so all references
5636 from the dynamic object to this symbol will go through the global
5637 offset table. The dynamic linker will use the .dynsym entry to
5638 determine the address it must put in the global offset table, so
5639 both the dynamic object and the regular object will refer to the
5640 same memory location for the variable.
5641
5642 Of course, if the symbol is referenced using SDAREL relocs, we
5643 must instead allocate it in .sbss. */
5644
5645 if (ppc_elf_hash_entry (h)->has_sda_refs)
5646 s = htab->dynsbss;
5647 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5648 s = htab->elf.sdynrelro;
5649 else
5650 s = htab->elf.sdynbss;
5651 BFD_ASSERT (s != NULL);
5652
5653 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5654 copy the initial value out of the dynamic object and into the
5655 runtime process image. We need to remember the offset into the
5656 .rela.bss section we are going to use. */
5657 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5658 {
5659 asection *srel;
5660
5661 if (ppc_elf_hash_entry (h)->has_sda_refs)
5662 srel = htab->relsbss;
5663 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5664 srel = htab->elf.sreldynrelro;
5665 else
5666 srel = htab->elf.srelbss;
5667 BFD_ASSERT (srel != NULL);
5668 srel->size += sizeof (Elf32_External_Rela);
5669 h->needs_copy = 1;
5670 }
5671
5672 /* We no longer want dyn_relocs. */
5673 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5674 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5675 }
5676 \f
5677 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5678 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5679 specifying the addend on the plt relocation. For -fpic code, the sym
5680 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5681 xxxxxxxx.got2.plt_pic32.<callee>. */
5682
5683 static bfd_boolean
5684 add_stub_sym (struct plt_entry *ent,
5685 struct elf_link_hash_entry *h,
5686 struct bfd_link_info *info)
5687 {
5688 struct elf_link_hash_entry *sh;
5689 size_t len1, len2, len3;
5690 char *name;
5691 const char *stub;
5692 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5693
5694 if (bfd_link_pic (info))
5695 stub = ".plt_pic32.";
5696 else
5697 stub = ".plt_call32.";
5698
5699 len1 = strlen (h->root.root.string);
5700 len2 = strlen (stub);
5701 len3 = 0;
5702 if (ent->sec)
5703 len3 = strlen (ent->sec->name);
5704 name = bfd_malloc (len1 + len2 + len3 + 9);
5705 if (name == NULL)
5706 return FALSE;
5707 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5708 if (ent->sec)
5709 memcpy (name + 8, ent->sec->name, len3);
5710 memcpy (name + 8 + len3, stub, len2);
5711 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5712 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5713 if (sh == NULL)
5714 return FALSE;
5715 if (sh->root.type == bfd_link_hash_new)
5716 {
5717 sh->root.type = bfd_link_hash_defined;
5718 sh->root.u.def.section = htab->glink;
5719 sh->root.u.def.value = ent->glink_offset;
5720 sh->ref_regular = 1;
5721 sh->def_regular = 1;
5722 sh->ref_regular_nonweak = 1;
5723 sh->forced_local = 1;
5724 sh->non_elf = 0;
5725 sh->root.linker_def = 1;
5726 }
5727 return TRUE;
5728 }
5729
5730 /* Allocate NEED contiguous space in .got, and return the offset.
5731 Handles allocation of the got header when crossing 32k. */
5732
5733 static bfd_vma
5734 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5735 {
5736 bfd_vma where;
5737 unsigned int max_before_header;
5738
5739 if (htab->plt_type == PLT_VXWORKS)
5740 {
5741 where = htab->elf.sgot->size;
5742 htab->elf.sgot->size += need;
5743 }
5744 else
5745 {
5746 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5747 if (need <= htab->got_gap)
5748 {
5749 where = max_before_header - htab->got_gap;
5750 htab->got_gap -= need;
5751 }
5752 else
5753 {
5754 if (htab->elf.sgot->size + need > max_before_header
5755 && htab->elf.sgot->size <= max_before_header)
5756 {
5757 htab->got_gap = max_before_header - htab->elf.sgot->size;
5758 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5759 }
5760 where = htab->elf.sgot->size;
5761 htab->elf.sgot->size += need;
5762 }
5763 }
5764 return where;
5765 }
5766
5767 /* Calculate size of GOT entries for symbol given its TLS_MASK.
5768 TLS_LD is excluded because those go in a special GOT slot. */
5769
5770 static inline unsigned int
5771 got_entries_needed (int tls_mask)
5772 {
5773 unsigned int need;
5774 if ((tls_mask & TLS_TLS) == 0)
5775 need = 4;
5776 else
5777 {
5778 need = 0;
5779 if ((tls_mask & TLS_GD) != 0)
5780 need += 8;
5781 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5782 need += 4;
5783 if ((tls_mask & TLS_DTPREL) != 0)
5784 need += 4;
5785 }
5786 return need;
5787 }
5788
5789 /* Calculate size of relocs needed for symbol given its TLS_MASK and
5790 NEEDed GOT entries. KNOWN says a TPREL offset can be calculated at
5791 link time. */
5792
5793 static inline unsigned int
5794 got_relocs_needed (int tls_mask, unsigned int need, bfd_boolean known)
5795 {
5796 /* All the entries we allocated need relocs.
5797 Except IE in executable with a local symbol. We could also omit
5798 the DTPREL reloc on the second word of a GD entry under the same
5799 condition as that for IE, but ld.so needs to differentiate
5800 LD and GD entries. */
5801 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0 && known)
5802 need -= 4;
5803 return need * sizeof (Elf32_External_Rela) / 4;
5804 }
5805
5806 /* If H is undefined, make it dynamic if that makes sense. */
5807
5808 static bfd_boolean
5809 ensure_undef_dynamic (struct bfd_link_info *info,
5810 struct elf_link_hash_entry *h)
5811 {
5812 struct elf_link_hash_table *htab = elf_hash_table (info);
5813
5814 if (htab->dynamic_sections_created
5815 && ((info->dynamic_undefined_weak != 0
5816 && h->root.type == bfd_link_hash_undefweak)
5817 || h->root.type == bfd_link_hash_undefined)
5818 && h->dynindx == -1
5819 && !h->forced_local
5820 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5821 return bfd_elf_link_record_dynamic_symbol (info, h);
5822 return TRUE;
5823 }
5824
5825 /* Allocate space in associated reloc sections for dynamic relocs. */
5826
5827 static bfd_boolean
5828 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5829 {
5830 struct bfd_link_info *info = inf;
5831 struct ppc_elf_link_hash_entry *eh;
5832 struct ppc_elf_link_hash_table *htab;
5833 struct elf_dyn_relocs *p;
5834 bfd_boolean dyn;
5835
5836 if (h->root.type == bfd_link_hash_indirect)
5837 return TRUE;
5838
5839 htab = ppc_elf_hash_table (info);
5840 eh = (struct ppc_elf_link_hash_entry *) h;
5841 if (eh->elf.got.refcount > 0
5842 || (ELIMINATE_COPY_RELOCS
5843 && !eh->elf.def_regular
5844 && eh->elf.protected_def
5845 && eh->has_addr16_ha
5846 && eh->has_addr16_lo
5847 && htab->params->pic_fixup > 0))
5848 {
5849 unsigned int need;
5850
5851 /* Make sure this symbol is output as a dynamic symbol. */
5852 if (!ensure_undef_dynamic (info, &eh->elf))
5853 return FALSE;
5854
5855 need = 0;
5856 if ((eh->tls_mask & TLS_LD) != 0)
5857 {
5858 if (!eh->elf.def_dynamic)
5859 /* We'll just use htab->tlsld_got.offset. This should
5860 always be the case. It's a little odd if we have
5861 a local dynamic reloc against a non-local symbol. */
5862 htab->tlsld_got.refcount += 1;
5863 else
5864 need += 8;
5865 }
5866 need += got_entries_needed (eh->tls_mask);
5867 if (need == 0)
5868 eh->elf.got.offset = (bfd_vma) -1;
5869 else
5870 {
5871 eh->elf.got.offset = allocate_got (htab, need);
5872 if ((bfd_link_pic (info)
5873 || (htab->elf.dynamic_sections_created
5874 && eh->elf.dynindx != -1
5875 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
5876 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
5877 {
5878 asection *rsec;
5879 bfd_boolean tprel_known = (bfd_link_executable (info)
5880 && SYMBOL_REFERENCES_LOCAL (info,
5881 &eh->elf));
5882
5883 need = got_relocs_needed (eh->tls_mask, need, tprel_known);
5884 if ((eh->tls_mask & TLS_LD) != 0 && eh->elf.def_dynamic)
5885 need -= sizeof (Elf32_External_Rela);
5886 rsec = htab->elf.srelgot;
5887 if (eh->elf.type == STT_GNU_IFUNC)
5888 rsec = htab->elf.irelplt;
5889 rsec->size += need;
5890 }
5891 }
5892 }
5893 else
5894 eh->elf.got.offset = (bfd_vma) -1;
5895
5896 /* If no dynamic sections we can't have dynamic relocs, except for
5897 IFUNCs which are handled even in static executables. */
5898 if (!htab->elf.dynamic_sections_created
5899 && h->type != STT_GNU_IFUNC)
5900 eh->dyn_relocs = NULL;
5901
5902 /* Discard relocs on undefined symbols that must be local. */
5903 else if (h->root.type == bfd_link_hash_undefined
5904 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5905 eh->dyn_relocs = NULL;
5906
5907 /* Also discard relocs on undefined weak syms with non-default
5908 visibility, or when dynamic_undefined_weak says so. */
5909 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
5910 eh->dyn_relocs = NULL;
5911
5912 if (eh->dyn_relocs == NULL)
5913 ;
5914
5915 /* In the shared -Bsymbolic case, discard space allocated for
5916 dynamic pc-relative relocs against symbols which turn out to be
5917 defined in regular objects. For the normal shared case, discard
5918 space for relocs that have become local due to symbol visibility
5919 changes. */
5920 else if (bfd_link_pic (info))
5921 {
5922 /* Relocs that use pc_count are those that appear on a call insn,
5923 or certain REL relocs (see must_be_dyn_reloc) that can be
5924 generated via assembly. We want calls to protected symbols to
5925 resolve directly to the function rather than going via the plt.
5926 If people want function pointer comparisons to work as expected
5927 then they should avoid writing weird assembly. */
5928 if (SYMBOL_CALLS_LOCAL (info, h))
5929 {
5930 struct elf_dyn_relocs **pp;
5931
5932 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5933 {
5934 p->count -= p->pc_count;
5935 p->pc_count = 0;
5936 if (p->count == 0)
5937 *pp = p->next;
5938 else
5939 pp = &p->next;
5940 }
5941 }
5942
5943 if (htab->is_vxworks)
5944 {
5945 struct elf_dyn_relocs **pp;
5946
5947 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5948 {
5949 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5950 *pp = p->next;
5951 else
5952 pp = &p->next;
5953 }
5954 }
5955
5956 if (eh->dyn_relocs != NULL)
5957 {
5958 /* Make sure this symbol is output as a dynamic symbol. */
5959 if (!ensure_undef_dynamic (info, h))
5960 return FALSE;
5961 }
5962 }
5963 else if (ELIMINATE_COPY_RELOCS)
5964 {
5965 /* For the non-pic case, discard space for relocs against
5966 symbols which turn out to need copy relocs or are not
5967 dynamic. */
5968 if (h->dynamic_adjusted
5969 && !h->def_regular
5970 && !ELF_COMMON_DEF_P (h)
5971 && !(h->protected_def
5972 && eh->has_addr16_ha
5973 && eh->has_addr16_lo
5974 && htab->params->pic_fixup > 0))
5975 {
5976 /* Make sure this symbol is output as a dynamic symbol. */
5977 if (!ensure_undef_dynamic (info, h))
5978 return FALSE;
5979
5980 if (h->dynindx == -1)
5981 eh->dyn_relocs = NULL;
5982 }
5983 else
5984 eh->dyn_relocs = NULL;
5985 }
5986
5987 /* Allocate space. */
5988 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5989 {
5990 asection *sreloc = elf_section_data (p->sec)->sreloc;
5991 if (eh->elf.type == STT_GNU_IFUNC)
5992 sreloc = htab->elf.irelplt;
5993 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5994 }
5995
5996 /* Handle PLT relocs. Done last, after dynindx has settled. */
5997 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
5998 if (dyn || h->type == STT_GNU_IFUNC)
5999 {
6000 struct plt_entry *ent;
6001 bfd_boolean doneone = FALSE;
6002 bfd_vma plt_offset = 0, glink_offset = 0;
6003
6004 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6005 if (ent->plt.refcount > 0)
6006 {
6007 asection *s = htab->elf.splt;
6008
6009 if (!dyn)
6010 s = htab->elf.iplt;
6011
6012 if (htab->plt_type == PLT_NEW || !dyn)
6013 {
6014 if (!doneone)
6015 {
6016 plt_offset = s->size;
6017 s->size += 4;
6018 }
6019 ent->plt.offset = plt_offset;
6020
6021 s = htab->glink;
6022 if (!doneone || bfd_link_pic (info))
6023 {
6024 glink_offset = s->size;
6025 s->size += GLINK_ENTRY_SIZE;
6026 if (h == htab->tls_get_addr
6027 && !htab->params->no_tls_get_addr_opt)
6028 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
6029 }
6030 if (!doneone
6031 && !bfd_link_pic (info)
6032 && h->def_dynamic
6033 && !h->def_regular)
6034 {
6035 h->root.u.def.section = s;
6036 h->root.u.def.value = glink_offset;
6037 }
6038 ent->glink_offset = glink_offset;
6039
6040 if (htab->params->emit_stub_syms
6041 && !add_stub_sym (ent, h, info))
6042 return FALSE;
6043 }
6044 else
6045 {
6046 if (!doneone)
6047 {
6048 /* If this is the first .plt entry, make room
6049 for the special first entry. */
6050 if (s->size == 0)
6051 s->size += htab->plt_initial_entry_size;
6052
6053 /* The PowerPC PLT is actually composed of two
6054 parts, the first part is 2 words (for a load
6055 and a jump), and then there is a remaining
6056 word available at the end. */
6057 plt_offset = (htab->plt_initial_entry_size
6058 + (htab->plt_slot_size
6059 * ((s->size
6060 - htab->plt_initial_entry_size)
6061 / htab->plt_entry_size)));
6062
6063 /* If this symbol is not defined in a regular
6064 file, and we are not generating a shared
6065 library, then set the symbol to this location
6066 in the .plt. This is to avoid text
6067 relocations, and is required to make
6068 function pointers compare as equal between
6069 the normal executable and the shared library. */
6070 if (! bfd_link_pic (info)
6071 && h->def_dynamic
6072 && !h->def_regular)
6073 {
6074 h->root.u.def.section = s;
6075 h->root.u.def.value = plt_offset;
6076 }
6077
6078 /* Make room for this entry. */
6079 s->size += htab->plt_entry_size;
6080 /* After the 8192nd entry, room for two entries
6081 is allocated. */
6082 if (htab->plt_type == PLT_OLD
6083 && (s->size - htab->plt_initial_entry_size)
6084 / htab->plt_entry_size
6085 > PLT_NUM_SINGLE_ENTRIES)
6086 s->size += htab->plt_entry_size;
6087 }
6088 ent->plt.offset = plt_offset;
6089 }
6090
6091 /* We also need to make an entry in the .rela.plt section. */
6092 if (!doneone)
6093 {
6094 if (!dyn)
6095 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6096 else
6097 {
6098 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6099
6100 if (htab->plt_type == PLT_VXWORKS)
6101 {
6102 /* Allocate space for the unloaded relocations. */
6103 if (!bfd_link_pic (info)
6104 && htab->elf.dynamic_sections_created)
6105 {
6106 if (ent->plt.offset
6107 == (bfd_vma) htab->plt_initial_entry_size)
6108 {
6109 htab->srelplt2->size
6110 += (sizeof (Elf32_External_Rela)
6111 * VXWORKS_PLTRESOLVE_RELOCS);
6112 }
6113
6114 htab->srelplt2->size
6115 += (sizeof (Elf32_External_Rela)
6116 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6117 }
6118
6119 /* Every PLT entry has an associated GOT entry in
6120 .got.plt. */
6121 htab->elf.sgotplt->size += 4;
6122 }
6123 }
6124 doneone = TRUE;
6125 }
6126 }
6127 else
6128 ent->plt.offset = (bfd_vma) -1;
6129
6130 if (!doneone)
6131 {
6132 h->plt.plist = NULL;
6133 h->needs_plt = 0;
6134 }
6135 }
6136 else
6137 {
6138 h->plt.plist = NULL;
6139 h->needs_plt = 0;
6140 }
6141
6142 return TRUE;
6143 }
6144
6145 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6146 read-only sections. */
6147
6148 static bfd_boolean
6149 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6150 {
6151 asection *sec;
6152
6153 if (h->root.type == bfd_link_hash_indirect)
6154 return TRUE;
6155
6156 sec = readonly_dynrelocs (h);
6157 if (sec != NULL)
6158 {
6159 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
6160
6161 info->flags |= DF_TEXTREL;
6162 info->callbacks->minfo
6163 (_("%B: dynamic relocation in read-only section `%A'\n"),
6164 sec->owner, sec);
6165
6166 /* Not an error, just cut short the traversal. */
6167 return FALSE;
6168 }
6169 return TRUE;
6170 }
6171
6172 static const unsigned char glink_eh_frame_cie[] =
6173 {
6174 0, 0, 0, 16, /* length. */
6175 0, 0, 0, 0, /* id. */
6176 1, /* CIE version. */
6177 'z', 'R', 0, /* Augmentation string. */
6178 4, /* Code alignment. */
6179 0x7c, /* Data alignment. */
6180 65, /* RA reg. */
6181 1, /* Augmentation size. */
6182 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6183 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6184 };
6185
6186 /* Set the sizes of the dynamic sections. */
6187
6188 static bfd_boolean
6189 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6190 struct bfd_link_info *info)
6191 {
6192 struct ppc_elf_link_hash_table *htab;
6193 asection *s;
6194 bfd_boolean relocs;
6195 bfd *ibfd;
6196
6197 #ifdef DEBUG
6198 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6199 #endif
6200
6201 htab = ppc_elf_hash_table (info);
6202 BFD_ASSERT (htab->elf.dynobj != NULL);
6203
6204 if (elf_hash_table (info)->dynamic_sections_created)
6205 {
6206 /* Set the contents of the .interp section to the interpreter. */
6207 if (bfd_link_executable (info) && !info->nointerp)
6208 {
6209 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6210 BFD_ASSERT (s != NULL);
6211 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6212 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6213 }
6214 }
6215
6216 if (htab->plt_type == PLT_OLD)
6217 htab->got_header_size = 16;
6218 else if (htab->plt_type == PLT_NEW)
6219 htab->got_header_size = 12;
6220
6221 /* Set up .got offsets for local syms, and space for local dynamic
6222 relocs. */
6223 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6224 {
6225 bfd_signed_vma *local_got;
6226 bfd_signed_vma *end_local_got;
6227 struct plt_entry **local_plt;
6228 struct plt_entry **end_local_plt;
6229 char *lgot_masks;
6230 bfd_size_type locsymcount;
6231 Elf_Internal_Shdr *symtab_hdr;
6232
6233 if (!is_ppc_elf (ibfd))
6234 continue;
6235
6236 for (s = ibfd->sections; s != NULL; s = s->next)
6237 {
6238 struct ppc_dyn_relocs *p;
6239
6240 for (p = ((struct ppc_dyn_relocs *)
6241 elf_section_data (s)->local_dynrel);
6242 p != NULL;
6243 p = p->next)
6244 {
6245 if (!bfd_is_abs_section (p->sec)
6246 && bfd_is_abs_section (p->sec->output_section))
6247 {
6248 /* Input section has been discarded, either because
6249 it is a copy of a linkonce section or due to
6250 linker script /DISCARD/, so we'll be discarding
6251 the relocs too. */
6252 }
6253 else if (htab->is_vxworks
6254 && strcmp (p->sec->output_section->name,
6255 ".tls_vars") == 0)
6256 {
6257 /* Relocations in vxworks .tls_vars sections are
6258 handled specially by the loader. */
6259 }
6260 else if (p->count != 0)
6261 {
6262 asection *sreloc = elf_section_data (p->sec)->sreloc;
6263 if (p->ifunc)
6264 sreloc = htab->elf.irelplt;
6265 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6266 if ((p->sec->output_section->flags
6267 & (SEC_READONLY | SEC_ALLOC))
6268 == (SEC_READONLY | SEC_ALLOC))
6269 {
6270 info->flags |= DF_TEXTREL;
6271 info->callbacks->minfo (_("%B: dynamic relocation in read-only section `%A'\n"),
6272 p->sec->owner, p->sec);
6273 }
6274 }
6275 }
6276 }
6277
6278 local_got = elf_local_got_refcounts (ibfd);
6279 if (!local_got)
6280 continue;
6281
6282 symtab_hdr = &elf_symtab_hdr (ibfd);
6283 locsymcount = symtab_hdr->sh_info;
6284 end_local_got = local_got + locsymcount;
6285 local_plt = (struct plt_entry **) end_local_got;
6286 end_local_plt = local_plt + locsymcount;
6287 lgot_masks = (char *) end_local_plt;
6288
6289 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6290 if (*local_got > 0)
6291 {
6292 unsigned int need;
6293 if ((*lgot_masks & TLS_LD) != 0)
6294 htab->tlsld_got.refcount += 1;
6295 need = got_entries_needed (*lgot_masks);
6296 if (need == 0)
6297 *local_got = (bfd_vma) -1;
6298 else
6299 {
6300 *local_got = allocate_got (htab, need);
6301 if (bfd_link_pic (info))
6302 {
6303 asection *srel;
6304 bfd_boolean tprel_known = bfd_link_executable (info);
6305
6306 need = got_relocs_needed (*lgot_masks, need, tprel_known);
6307 srel = htab->elf.srelgot;
6308 if ((*lgot_masks & PLT_IFUNC) != 0)
6309 srel = htab->elf.irelplt;
6310 srel->size += need;
6311 }
6312 }
6313 }
6314 else
6315 *local_got = (bfd_vma) -1;
6316
6317 if (htab->is_vxworks)
6318 continue;
6319
6320 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6321 for (; local_plt < end_local_plt; ++local_plt)
6322 {
6323 struct plt_entry *ent;
6324 bfd_boolean doneone = FALSE;
6325 bfd_vma plt_offset = 0, glink_offset = 0;
6326
6327 for (ent = *local_plt; ent != NULL; ent = ent->next)
6328 if (ent->plt.refcount > 0)
6329 {
6330 s = htab->elf.iplt;
6331
6332 if (!doneone)
6333 {
6334 plt_offset = s->size;
6335 s->size += 4;
6336 }
6337 ent->plt.offset = plt_offset;
6338
6339 s = htab->glink;
6340 if (!doneone || bfd_link_pic (info))
6341 {
6342 glink_offset = s->size;
6343 s->size += GLINK_ENTRY_SIZE;
6344 }
6345 ent->glink_offset = glink_offset;
6346
6347 if (!doneone)
6348 {
6349 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6350 doneone = TRUE;
6351 }
6352 }
6353 else
6354 ent->plt.offset = (bfd_vma) -1;
6355 }
6356 }
6357
6358 /* Allocate space for global sym dynamic relocs. */
6359 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6360
6361 if (htab->tlsld_got.refcount > 0)
6362 {
6363 htab->tlsld_got.offset = allocate_got (htab, 8);
6364 if (bfd_link_pic (info))
6365 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6366 }
6367 else
6368 htab->tlsld_got.offset = (bfd_vma) -1;
6369
6370 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6371 {
6372 unsigned int g_o_t = 32768;
6373
6374 /* If we haven't allocated the header, do so now. When we get here,
6375 for old plt/got the got size will be 0 to 32764 (not allocated),
6376 or 32780 to 65536 (header allocated). For new plt/got, the
6377 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6378 if (htab->elf.sgot->size <= 32768)
6379 {
6380 g_o_t = htab->elf.sgot->size;
6381 if (htab->plt_type == PLT_OLD)
6382 g_o_t += 4;
6383 htab->elf.sgot->size += htab->got_header_size;
6384 }
6385
6386 htab->elf.hgot->root.u.def.value = g_o_t;
6387 }
6388 if (bfd_link_pic (info))
6389 {
6390 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6391
6392 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6393 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6394 }
6395 if (info->emitrelocations)
6396 {
6397 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6398
6399 if (sda != NULL && sda->ref_regular)
6400 sda->root.u.def.section->flags |= SEC_KEEP;
6401 sda = htab->sdata[1].sym;
6402 if (sda != NULL && sda->ref_regular)
6403 sda->root.u.def.section->flags |= SEC_KEEP;
6404 }
6405
6406 if (htab->glink != NULL
6407 && htab->glink->size != 0
6408 && htab->elf.dynamic_sections_created)
6409 {
6410 htab->glink_pltresolve = htab->glink->size;
6411 /* Space for the branch table. ??? We don't need entries for
6412 non-dynamic symbols in this table. This case can arise with
6413 static ifuncs or forced local ifuncs. */
6414 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6415 /* Pad out to align the start of PLTresolve. */
6416 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6417 ? 63 : 15);
6418 htab->glink->size += GLINK_PLTRESOLVE;
6419
6420 if (htab->params->emit_stub_syms)
6421 {
6422 struct elf_link_hash_entry *sh;
6423 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6424 TRUE, FALSE, FALSE);
6425 if (sh == NULL)
6426 return FALSE;
6427 if (sh->root.type == bfd_link_hash_new)
6428 {
6429 sh->root.type = bfd_link_hash_defined;
6430 sh->root.u.def.section = htab->glink;
6431 sh->root.u.def.value = htab->glink_pltresolve;
6432 sh->ref_regular = 1;
6433 sh->def_regular = 1;
6434 sh->ref_regular_nonweak = 1;
6435 sh->forced_local = 1;
6436 sh->non_elf = 0;
6437 sh->root.linker_def = 1;
6438 }
6439 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6440 TRUE, FALSE, FALSE);
6441 if (sh == NULL)
6442 return FALSE;
6443 if (sh->root.type == bfd_link_hash_new)
6444 {
6445 sh->root.type = bfd_link_hash_defined;
6446 sh->root.u.def.section = htab->glink;
6447 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6448 sh->ref_regular = 1;
6449 sh->def_regular = 1;
6450 sh->ref_regular_nonweak = 1;
6451 sh->forced_local = 1;
6452 sh->non_elf = 0;
6453 sh->root.linker_def = 1;
6454 }
6455 }
6456 }
6457
6458 if (htab->glink != NULL
6459 && htab->glink->size != 0
6460 && htab->glink_eh_frame != NULL
6461 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6462 && _bfd_elf_eh_frame_present (info))
6463 {
6464 s = htab->glink_eh_frame;
6465 s->size = sizeof (glink_eh_frame_cie) + 20;
6466 if (bfd_link_pic (info))
6467 {
6468 s->size += 4;
6469 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6470 s->size += 4;
6471 }
6472 }
6473
6474 /* We've now determined the sizes of the various dynamic sections.
6475 Allocate memory for them. */
6476 relocs = FALSE;
6477 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6478 {
6479 bfd_boolean strip_section = TRUE;
6480
6481 if ((s->flags & SEC_LINKER_CREATED) == 0)
6482 continue;
6483
6484 if (s == htab->elf.splt
6485 || s == htab->elf.sgot)
6486 {
6487 /* We'd like to strip these sections if they aren't needed, but if
6488 we've exported dynamic symbols from them we must leave them.
6489 It's too late to tell BFD to get rid of the symbols. */
6490 if (htab->elf.hplt != NULL)
6491 strip_section = FALSE;
6492 /* Strip this section if we don't need it; see the
6493 comment below. */
6494 }
6495 else if (s == htab->elf.iplt
6496 || s == htab->glink
6497 || s == htab->glink_eh_frame
6498 || s == htab->elf.sgotplt
6499 || s == htab->sbss
6500 || s == htab->elf.sdynbss
6501 || s == htab->elf.sdynrelro
6502 || s == htab->dynsbss)
6503 {
6504 /* Strip these too. */
6505 }
6506 else if (s == htab->sdata[0].section
6507 || s == htab->sdata[1].section)
6508 {
6509 strip_section = (s->flags & SEC_KEEP) == 0;
6510 }
6511 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6512 ".rela"))
6513 {
6514 if (s->size != 0)
6515 {
6516 /* Remember whether there are any relocation sections. */
6517 relocs = TRUE;
6518
6519 /* We use the reloc_count field as a counter if we need
6520 to copy relocs into the output file. */
6521 s->reloc_count = 0;
6522 }
6523 }
6524 else
6525 {
6526 /* It's not one of our sections, so don't allocate space. */
6527 continue;
6528 }
6529
6530 if (s->size == 0 && strip_section)
6531 {
6532 /* If we don't need this section, strip it from the
6533 output file. This is mostly to handle .rela.bss and
6534 .rela.plt. We must create both sections in
6535 create_dynamic_sections, because they must be created
6536 before the linker maps input sections to output
6537 sections. The linker does that before
6538 adjust_dynamic_symbol is called, and it is that
6539 function which decides whether anything needs to go
6540 into these sections. */
6541 s->flags |= SEC_EXCLUDE;
6542 continue;
6543 }
6544
6545 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6546 continue;
6547
6548 /* Allocate memory for the section contents. */
6549 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6550 if (s->contents == NULL)
6551 return FALSE;
6552 }
6553
6554 if (htab->elf.dynamic_sections_created)
6555 {
6556 /* Add some entries to the .dynamic section. We fill in the
6557 values later, in ppc_elf_finish_dynamic_sections, but we
6558 must add the entries now so that we get the correct size for
6559 the .dynamic section. The DT_DEBUG entry is filled in by the
6560 dynamic linker and used by the debugger. */
6561 #define add_dynamic_entry(TAG, VAL) \
6562 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6563
6564 if (bfd_link_executable (info))
6565 {
6566 if (!add_dynamic_entry (DT_DEBUG, 0))
6567 return FALSE;
6568 }
6569
6570 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6571 {
6572 if (!add_dynamic_entry (DT_PLTGOT, 0)
6573 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6574 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6575 || !add_dynamic_entry (DT_JMPREL, 0))
6576 return FALSE;
6577 }
6578
6579 if (htab->plt_type == PLT_NEW
6580 && htab->glink != NULL
6581 && htab->glink->size != 0)
6582 {
6583 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6584 return FALSE;
6585 if (!htab->params->no_tls_get_addr_opt
6586 && htab->tls_get_addr != NULL
6587 && htab->tls_get_addr->plt.plist != NULL
6588 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6589 return FALSE;
6590 }
6591
6592 if (relocs)
6593 {
6594 if (!add_dynamic_entry (DT_RELA, 0)
6595 || !add_dynamic_entry (DT_RELASZ, 0)
6596 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6597 return FALSE;
6598 }
6599
6600 /* If any dynamic relocs apply to a read-only section, then we
6601 need a DT_TEXTREL entry. */
6602 if ((info->flags & DF_TEXTREL) == 0)
6603 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6604 info);
6605
6606 if ((info->flags & DF_TEXTREL) != 0)
6607 {
6608 if (!add_dynamic_entry (DT_TEXTREL, 0))
6609 return FALSE;
6610 }
6611 if (htab->is_vxworks
6612 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6613 return FALSE;
6614 }
6615 #undef add_dynamic_entry
6616
6617 if (htab->glink_eh_frame != NULL
6618 && htab->glink_eh_frame->contents != NULL)
6619 {
6620 unsigned char *p = htab->glink_eh_frame->contents;
6621 bfd_vma val;
6622
6623 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6624 /* CIE length (rewrite in case little-endian). */
6625 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6626 p += sizeof (glink_eh_frame_cie);
6627 /* FDE length. */
6628 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6629 bfd_put_32 (htab->elf.dynobj, val, p);
6630 p += 4;
6631 /* CIE pointer. */
6632 val = p - htab->glink_eh_frame->contents;
6633 bfd_put_32 (htab->elf.dynobj, val, p);
6634 p += 4;
6635 /* Offset to .glink. Set later. */
6636 p += 4;
6637 /* .glink size. */
6638 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6639 p += 4;
6640 /* Augmentation. */
6641 p += 1;
6642
6643 if (bfd_link_pic (info)
6644 && htab->elf.dynamic_sections_created)
6645 {
6646 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6647 if (adv < 64)
6648 *p++ = DW_CFA_advance_loc + adv;
6649 else if (adv < 256)
6650 {
6651 *p++ = DW_CFA_advance_loc1;
6652 *p++ = adv;
6653 }
6654 else if (adv < 65536)
6655 {
6656 *p++ = DW_CFA_advance_loc2;
6657 bfd_put_16 (htab->elf.dynobj, adv, p);
6658 p += 2;
6659 }
6660 else
6661 {
6662 *p++ = DW_CFA_advance_loc4;
6663 bfd_put_32 (htab->elf.dynobj, adv, p);
6664 p += 4;
6665 }
6666 *p++ = DW_CFA_register;
6667 *p++ = 65;
6668 p++;
6669 *p++ = DW_CFA_advance_loc + 4;
6670 *p++ = DW_CFA_restore_extended;
6671 *p++ = 65;
6672 }
6673 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6674 == htab->glink_eh_frame->size);
6675 }
6676
6677 return TRUE;
6678 }
6679
6680 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6681 if it looks like nothing is using them. */
6682
6683 static void
6684 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6685 {
6686 struct elf_link_hash_entry *sda = lsect->sym;
6687
6688 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6689 {
6690 asection *s;
6691
6692 s = bfd_get_section_by_name (output_bfd, lsect->name);
6693 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6694 {
6695 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6696 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6697 {
6698 sda->def_regular = 0;
6699 /* This is somewhat magic. See elf_link_output_extsym. */
6700 sda->ref_dynamic = 1;
6701 sda->forced_local = 0;
6702 }
6703 }
6704 }
6705 }
6706
6707 void
6708 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6709 {
6710 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6711
6712 if (htab != NULL)
6713 {
6714 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6715 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6716 }
6717 }
6718
6719
6720 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6721
6722 static bfd_boolean
6723 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6724 {
6725 if (h->plt.plist != NULL
6726 && !h->def_regular
6727 && (!h->pointer_equality_needed
6728 || !h->ref_regular_nonweak))
6729 return FALSE;
6730
6731 return _bfd_elf_hash_symbol (h);
6732 }
6733 \f
6734 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6735
6736 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6737 used for some functions that are allowed to break the ABI). */
6738 static const int shared_stub_entry[] =
6739 {
6740 0x7c0802a6, /* mflr 0 */
6741 0x429f0005, /* bcl 20, 31, .Lxxx */
6742 0x7d8802a6, /* mflr 12 */
6743 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6744 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6745 0x7c0803a6, /* mtlr 0 */
6746 0x7d8903a6, /* mtctr 12 */
6747 0x4e800420, /* bctr */
6748 };
6749
6750 static const int stub_entry[] =
6751 {
6752 0x3d800000, /* lis 12,xxx@ha */
6753 0x398c0000, /* addi 12,12,xxx@l */
6754 0x7d8903a6, /* mtctr 12 */
6755 0x4e800420, /* bctr */
6756 };
6757
6758 struct ppc_elf_relax_info
6759 {
6760 unsigned int workaround_size;
6761 unsigned int picfixup_size;
6762 };
6763
6764 /* This function implements long branch trampolines, and the ppc476
6765 icache bug workaround. Any section needing trampolines or patch
6766 space for the workaround has its size extended so that we can
6767 add trampolines at the end of the section. */
6768
6769 static bfd_boolean
6770 ppc_elf_relax_section (bfd *abfd,
6771 asection *isec,
6772 struct bfd_link_info *link_info,
6773 bfd_boolean *again)
6774 {
6775 struct one_branch_fixup
6776 {
6777 struct one_branch_fixup *next;
6778 asection *tsec;
6779 /* Final link, can use the symbol offset. For a
6780 relocatable link we use the symbol's index. */
6781 bfd_vma toff;
6782 bfd_vma trampoff;
6783 };
6784
6785 Elf_Internal_Shdr *symtab_hdr;
6786 bfd_byte *contents = NULL;
6787 Elf_Internal_Sym *isymbuf = NULL;
6788 Elf_Internal_Rela *internal_relocs = NULL;
6789 Elf_Internal_Rela *irel, *irelend = NULL;
6790 struct one_branch_fixup *branch_fixups = NULL;
6791 struct ppc_elf_relax_info *relax_info = NULL;
6792 unsigned changes = 0;
6793 bfd_boolean workaround_change;
6794 struct ppc_elf_link_hash_table *htab;
6795 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6796 asection *got2;
6797 bfd_boolean maybe_pasted;
6798
6799 *again = FALSE;
6800
6801 /* No need to do anything with non-alloc or non-code sections. */
6802 if ((isec->flags & SEC_ALLOC) == 0
6803 || (isec->flags & SEC_CODE) == 0
6804 || (isec->flags & SEC_LINKER_CREATED) != 0
6805 || isec->size < 4)
6806 return TRUE;
6807
6808 /* We cannot represent the required PIC relocs in the output, so don't
6809 do anything. The linker doesn't support mixing -shared and -r
6810 anyway. */
6811 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6812 return TRUE;
6813
6814 htab = ppc_elf_hash_table (link_info);
6815 if (htab == NULL)
6816 return TRUE;
6817
6818 isec->size = (isec->size + 3) & -4;
6819 if (isec->rawsize == 0)
6820 isec->rawsize = isec->size;
6821 trampbase = isec->size;
6822
6823 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6824 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6825 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6826
6827 if (htab->params->ppc476_workaround
6828 || htab->params->pic_fixup > 0)
6829 {
6830 if (elf_section_data (isec)->sec_info == NULL)
6831 {
6832 elf_section_data (isec)->sec_info
6833 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6834 if (elf_section_data (isec)->sec_info == NULL)
6835 return FALSE;
6836 }
6837 relax_info = elf_section_data (isec)->sec_info;
6838 trampbase -= relax_info->workaround_size;
6839 }
6840
6841 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6842 || strcmp (isec->output_section->name, ".fini") == 0);
6843 /* Space for a branch around any trampolines. */
6844 trampoff = trampbase;
6845 if (maybe_pasted && trampbase == isec->rawsize)
6846 trampoff += 4;
6847
6848 symtab_hdr = &elf_symtab_hdr (abfd);
6849 picfixup_size = 0;
6850 if (htab->params->branch_trampolines
6851 || htab->params->pic_fixup > 0)
6852 {
6853 /* Get a copy of the native relocations. */
6854 if (isec->reloc_count != 0)
6855 {
6856 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6857 link_info->keep_memory);
6858 if (internal_relocs == NULL)
6859 goto error_return;
6860 }
6861
6862 got2 = bfd_get_section_by_name (abfd, ".got2");
6863
6864 irelend = internal_relocs + isec->reloc_count;
6865 for (irel = internal_relocs; irel < irelend; irel++)
6866 {
6867 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6868 bfd_vma toff, roff;
6869 asection *tsec;
6870 struct one_branch_fixup *f;
6871 size_t insn_offset = 0;
6872 bfd_vma max_branch_offset = 0, val;
6873 bfd_byte *hit_addr;
6874 unsigned long t0;
6875 struct elf_link_hash_entry *h;
6876 struct plt_entry **plist;
6877 unsigned char sym_type;
6878
6879 switch (r_type)
6880 {
6881 case R_PPC_REL24:
6882 case R_PPC_LOCAL24PC:
6883 case R_PPC_PLTREL24:
6884 max_branch_offset = 1 << 25;
6885 break;
6886
6887 case R_PPC_REL14:
6888 case R_PPC_REL14_BRTAKEN:
6889 case R_PPC_REL14_BRNTAKEN:
6890 max_branch_offset = 1 << 15;
6891 break;
6892
6893 case R_PPC_ADDR16_HA:
6894 if (htab->params->pic_fixup > 0)
6895 break;
6896 continue;
6897
6898 default:
6899 continue;
6900 }
6901
6902 /* Get the value of the symbol referred to by the reloc. */
6903 h = NULL;
6904 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6905 {
6906 /* A local symbol. */
6907 Elf_Internal_Sym *isym;
6908
6909 /* Read this BFD's local symbols. */
6910 if (isymbuf == NULL)
6911 {
6912 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6913 if (isymbuf == NULL)
6914 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6915 symtab_hdr->sh_info, 0,
6916 NULL, NULL, NULL);
6917 if (isymbuf == 0)
6918 goto error_return;
6919 }
6920 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6921 if (isym->st_shndx == SHN_UNDEF)
6922 tsec = bfd_und_section_ptr;
6923 else if (isym->st_shndx == SHN_ABS)
6924 tsec = bfd_abs_section_ptr;
6925 else if (isym->st_shndx == SHN_COMMON)
6926 tsec = bfd_com_section_ptr;
6927 else
6928 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6929
6930 toff = isym->st_value;
6931 sym_type = ELF_ST_TYPE (isym->st_info);
6932 }
6933 else
6934 {
6935 /* Global symbol handling. */
6936 unsigned long indx;
6937
6938 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6939 h = elf_sym_hashes (abfd)[indx];
6940
6941 while (h->root.type == bfd_link_hash_indirect
6942 || h->root.type == bfd_link_hash_warning)
6943 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6944
6945 if (h->root.type == bfd_link_hash_defined
6946 || h->root.type == bfd_link_hash_defweak)
6947 {
6948 tsec = h->root.u.def.section;
6949 toff = h->root.u.def.value;
6950 }
6951 else if (h->root.type == bfd_link_hash_undefined
6952 || h->root.type == bfd_link_hash_undefweak)
6953 {
6954 tsec = bfd_und_section_ptr;
6955 toff = bfd_link_relocatable (link_info) ? indx : 0;
6956 }
6957 else
6958 continue;
6959
6960 /* If this branch is to __tls_get_addr then we may later
6961 optimise away the call. We won't be needing a long-
6962 branch stub in that case. */
6963 if (bfd_link_executable (link_info)
6964 && h == htab->tls_get_addr
6965 && irel != internal_relocs)
6966 {
6967 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6968 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6969 unsigned int tls_mask = 0;
6970
6971 /* The previous reloc should be one of R_PPC_TLSGD or
6972 R_PPC_TLSLD, or for older object files, a reloc
6973 on the __tls_get_addr arg setup insn. Get tls
6974 mask bits from the symbol on that reloc. */
6975 if (t_symndx < symtab_hdr->sh_info)
6976 {
6977 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6978
6979 if (local_got_offsets != NULL)
6980 {
6981 struct plt_entry **local_plt = (struct plt_entry **)
6982 (local_got_offsets + symtab_hdr->sh_info);
6983 char *lgot_masks = (char *)
6984 (local_plt + symtab_hdr->sh_info);
6985 tls_mask = lgot_masks[t_symndx];
6986 }
6987 }
6988 else
6989 {
6990 struct elf_link_hash_entry *th
6991 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6992
6993 while (th->root.type == bfd_link_hash_indirect
6994 || th->root.type == bfd_link_hash_warning)
6995 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6996
6997 tls_mask
6998 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6999 }
7000
7001 /* The mask bits tell us if the call will be
7002 optimised away. */
7003 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7004 && (t_rtype == R_PPC_TLSGD
7005 || t_rtype == R_PPC_GOT_TLSGD16
7006 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7007 continue;
7008 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7009 && (t_rtype == R_PPC_TLSLD
7010 || t_rtype == R_PPC_GOT_TLSLD16
7011 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7012 continue;
7013 }
7014
7015 sym_type = h->type;
7016 }
7017
7018 if (r_type == R_PPC_ADDR16_HA)
7019 {
7020 if (h != NULL
7021 && !h->def_regular
7022 && h->protected_def
7023 && ppc_elf_hash_entry (h)->has_addr16_ha
7024 && ppc_elf_hash_entry (h)->has_addr16_lo)
7025 picfixup_size += 12;
7026 continue;
7027 }
7028
7029 /* The condition here under which we call find_plt_ent must
7030 match that in relocate_section. If we call find_plt_ent here
7031 but not in relocate_section, or vice versa, then the branch
7032 destination used here may be incorrect. */
7033 plist = NULL;
7034 if (h != NULL)
7035 {
7036 /* We know is_branch_reloc (r_type) is true. */
7037 if (h->type == STT_GNU_IFUNC
7038 || r_type == R_PPC_PLTREL24)
7039 plist = &h->plt.plist;
7040 }
7041 else if (sym_type == STT_GNU_IFUNC
7042 && elf_local_got_offsets (abfd) != NULL)
7043 {
7044 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7045 struct plt_entry **local_plt = (struct plt_entry **)
7046 (local_got_offsets + symtab_hdr->sh_info);
7047 plist = local_plt + ELF32_R_SYM (irel->r_info);
7048 }
7049 if (plist != NULL)
7050 {
7051 bfd_vma addend = 0;
7052 struct plt_entry *ent;
7053
7054 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7055 addend = irel->r_addend;
7056 ent = find_plt_ent (plist, got2, addend);
7057 if (ent != NULL)
7058 {
7059 if (htab->plt_type == PLT_NEW
7060 || h == NULL
7061 || !htab->elf.dynamic_sections_created
7062 || h->dynindx == -1)
7063 {
7064 tsec = htab->glink;
7065 toff = ent->glink_offset;
7066 }
7067 else
7068 {
7069 tsec = htab->elf.splt;
7070 toff = ent->plt.offset;
7071 }
7072 }
7073 }
7074
7075 /* If the branch and target are in the same section, you have
7076 no hope of adding stubs. We'll error out later should the
7077 branch overflow. */
7078 if (tsec == isec)
7079 continue;
7080
7081 /* There probably isn't any reason to handle symbols in
7082 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7083 attribute for a code section, and we are only looking at
7084 branches. However, implement it correctly here as a
7085 reference for other target relax_section functions. */
7086 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7087 {
7088 /* At this stage in linking, no SEC_MERGE symbol has been
7089 adjusted, so all references to such symbols need to be
7090 passed through _bfd_merged_section_offset. (Later, in
7091 relocate_section, all SEC_MERGE symbols *except* for
7092 section symbols have been adjusted.)
7093
7094 gas may reduce relocations against symbols in SEC_MERGE
7095 sections to a relocation against the section symbol when
7096 the original addend was zero. When the reloc is against
7097 a section symbol we should include the addend in the
7098 offset passed to _bfd_merged_section_offset, since the
7099 location of interest is the original symbol. On the
7100 other hand, an access to "sym+addend" where "sym" is not
7101 a section symbol should not include the addend; Such an
7102 access is presumed to be an offset from "sym"; The
7103 location of interest is just "sym". */
7104 if (sym_type == STT_SECTION)
7105 toff += irel->r_addend;
7106
7107 toff
7108 = _bfd_merged_section_offset (abfd, &tsec,
7109 elf_section_data (tsec)->sec_info,
7110 toff);
7111
7112 if (sym_type != STT_SECTION)
7113 toff += irel->r_addend;
7114 }
7115 /* PLTREL24 addends are special. */
7116 else if (r_type != R_PPC_PLTREL24)
7117 toff += irel->r_addend;
7118
7119 /* Attempted -shared link of non-pic code loses. */
7120 if ((!bfd_link_relocatable (link_info)
7121 && tsec == bfd_und_section_ptr)
7122 || tsec->output_section == NULL
7123 || (tsec->owner != NULL
7124 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7125 continue;
7126
7127 roff = irel->r_offset;
7128
7129 /* If the branch is in range, no need to do anything. */
7130 if (tsec != bfd_und_section_ptr
7131 && (!bfd_link_relocatable (link_info)
7132 /* A relocatable link may have sections moved during
7133 final link, so do not presume they remain in range. */
7134 || tsec->output_section == isec->output_section))
7135 {
7136 bfd_vma symaddr, reladdr;
7137
7138 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7139 reladdr = isec->output_section->vma + isec->output_offset + roff;
7140 if (symaddr - reladdr + max_branch_offset
7141 < 2 * max_branch_offset)
7142 continue;
7143 }
7144
7145 /* Look for an existing fixup to this address. */
7146 for (f = branch_fixups; f ; f = f->next)
7147 if (f->tsec == tsec && f->toff == toff)
7148 break;
7149
7150 if (f == NULL)
7151 {
7152 size_t size;
7153 unsigned long stub_rtype;
7154
7155 val = trampoff - roff;
7156 if (val >= max_branch_offset)
7157 /* Oh dear, we can't reach a trampoline. Don't try to add
7158 one. We'll report an error later. */
7159 continue;
7160
7161 if (bfd_link_pic (link_info))
7162 {
7163 size = 4 * ARRAY_SIZE (shared_stub_entry);
7164 insn_offset = 12;
7165 }
7166 else
7167 {
7168 size = 4 * ARRAY_SIZE (stub_entry);
7169 insn_offset = 0;
7170 }
7171 stub_rtype = R_PPC_RELAX;
7172 if (tsec == htab->elf.splt
7173 || tsec == htab->glink)
7174 {
7175 stub_rtype = R_PPC_RELAX_PLT;
7176 if (r_type == R_PPC_PLTREL24)
7177 stub_rtype = R_PPC_RELAX_PLTREL24;
7178 }
7179
7180 /* Hijack the old relocation. Since we need two
7181 relocations for this use a "composite" reloc. */
7182 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7183 stub_rtype);
7184 irel->r_offset = trampoff + insn_offset;
7185 if (r_type == R_PPC_PLTREL24
7186 && stub_rtype != R_PPC_RELAX_PLTREL24)
7187 irel->r_addend = 0;
7188
7189 /* Record the fixup so we don't do it again this section. */
7190 f = bfd_malloc (sizeof (*f));
7191 f->next = branch_fixups;
7192 f->tsec = tsec;
7193 f->toff = toff;
7194 f->trampoff = trampoff;
7195 branch_fixups = f;
7196
7197 trampoff += size;
7198 changes++;
7199 }
7200 else
7201 {
7202 val = f->trampoff - roff;
7203 if (val >= max_branch_offset)
7204 continue;
7205
7206 /* Nop out the reloc, since we're finalizing things here. */
7207 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7208 }
7209
7210 /* Get the section contents. */
7211 if (contents == NULL)
7212 {
7213 /* Get cached copy if it exists. */
7214 if (elf_section_data (isec)->this_hdr.contents != NULL)
7215 contents = elf_section_data (isec)->this_hdr.contents;
7216 /* Go get them off disk. */
7217 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7218 goto error_return;
7219 }
7220
7221 /* Fix up the existing branch to hit the trampoline. */
7222 hit_addr = contents + roff;
7223 switch (r_type)
7224 {
7225 case R_PPC_REL24:
7226 case R_PPC_LOCAL24PC:
7227 case R_PPC_PLTREL24:
7228 t0 = bfd_get_32 (abfd, hit_addr);
7229 t0 &= ~0x3fffffc;
7230 t0 |= val & 0x3fffffc;
7231 bfd_put_32 (abfd, t0, hit_addr);
7232 break;
7233
7234 case R_PPC_REL14:
7235 case R_PPC_REL14_BRTAKEN:
7236 case R_PPC_REL14_BRNTAKEN:
7237 t0 = bfd_get_32 (abfd, hit_addr);
7238 t0 &= ~0xfffc;
7239 t0 |= val & 0xfffc;
7240 bfd_put_32 (abfd, t0, hit_addr);
7241 break;
7242 }
7243 }
7244
7245 while (branch_fixups != NULL)
7246 {
7247 struct one_branch_fixup *f = branch_fixups;
7248 branch_fixups = branch_fixups->next;
7249 free (f);
7250 }
7251 }
7252
7253 workaround_change = FALSE;
7254 newsize = trampoff;
7255 if (htab->params->ppc476_workaround
7256 && (!bfd_link_relocatable (link_info)
7257 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7258 {
7259 bfd_vma addr, end_addr;
7260 unsigned int crossings;
7261 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7262
7263 addr = isec->output_section->vma + isec->output_offset;
7264 end_addr = addr + trampoff;
7265 addr &= -pagesize;
7266 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7267 if (crossings != 0)
7268 {
7269 /* Keep space aligned, to ensure the patch code itself does
7270 not cross a page. Don't decrease size calculated on a
7271 previous pass as otherwise we might never settle on a layout. */
7272 newsize = 15 - ((end_addr - 1) & 15);
7273 newsize += crossings * 16;
7274 if (relax_info->workaround_size < newsize)
7275 {
7276 relax_info->workaround_size = newsize;
7277 workaround_change = TRUE;
7278 }
7279 /* Ensure relocate_section is called. */
7280 isec->flags |= SEC_RELOC;
7281 }
7282 newsize = trampoff + relax_info->workaround_size;
7283 }
7284
7285 if (htab->params->pic_fixup > 0)
7286 {
7287 picfixup_size -= relax_info->picfixup_size;
7288 if (picfixup_size != 0)
7289 relax_info->picfixup_size += picfixup_size;
7290 newsize += relax_info->picfixup_size;
7291 }
7292
7293 if (changes != 0 || picfixup_size != 0 || workaround_change)
7294 isec->size = newsize;
7295
7296 if (isymbuf != NULL
7297 && symtab_hdr->contents != (unsigned char *) isymbuf)
7298 {
7299 if (! link_info->keep_memory)
7300 free (isymbuf);
7301 else
7302 {
7303 /* Cache the symbols for elf_link_input_bfd. */
7304 symtab_hdr->contents = (unsigned char *) isymbuf;
7305 }
7306 }
7307
7308 if (contents != NULL
7309 && elf_section_data (isec)->this_hdr.contents != contents)
7310 {
7311 if (!changes && !link_info->keep_memory)
7312 free (contents);
7313 else
7314 {
7315 /* Cache the section contents for elf_link_input_bfd. */
7316 elf_section_data (isec)->this_hdr.contents = contents;
7317 }
7318 }
7319
7320 changes += picfixup_size;
7321 if (changes != 0)
7322 {
7323 /* Append sufficient NOP relocs so we can write out relocation
7324 information for the trampolines. */
7325 Elf_Internal_Shdr *rel_hdr;
7326 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7327 * sizeof (*new_relocs));
7328 unsigned ix;
7329
7330 if (!new_relocs)
7331 goto error_return;
7332 memcpy (new_relocs, internal_relocs,
7333 isec->reloc_count * sizeof (*new_relocs));
7334 for (ix = changes; ix--;)
7335 {
7336 irel = new_relocs + ix + isec->reloc_count;
7337
7338 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7339 }
7340 if (internal_relocs != elf_section_data (isec)->relocs)
7341 free (internal_relocs);
7342 elf_section_data (isec)->relocs = new_relocs;
7343 isec->reloc_count += changes;
7344 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7345 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7346 }
7347 else if (internal_relocs != NULL
7348 && elf_section_data (isec)->relocs != internal_relocs)
7349 free (internal_relocs);
7350
7351 *again = changes != 0 || workaround_change;
7352 return TRUE;
7353
7354 error_return:
7355 while (branch_fixups != NULL)
7356 {
7357 struct one_branch_fixup *f = branch_fixups;
7358 branch_fixups = branch_fixups->next;
7359 free (f);
7360 }
7361 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7362 free (isymbuf);
7363 if (contents != NULL
7364 && elf_section_data (isec)->this_hdr.contents != contents)
7365 free (contents);
7366 if (internal_relocs != NULL
7367 && elf_section_data (isec)->relocs != internal_relocs)
7368 free (internal_relocs);
7369 return FALSE;
7370 }
7371 \f
7372 /* What to do when ld finds relocations against symbols defined in
7373 discarded sections. */
7374
7375 static unsigned int
7376 ppc_elf_action_discarded (asection *sec)
7377 {
7378 if (strcmp (".fixup", sec->name) == 0)
7379 return 0;
7380
7381 if (strcmp (".got2", sec->name) == 0)
7382 return 0;
7383
7384 return _bfd_elf_default_action_discarded (sec);
7385 }
7386 \f
7387 /* Fill in the address for a pointer generated in a linker section. */
7388
7389 static bfd_vma
7390 elf_finish_pointer_linker_section (bfd *input_bfd,
7391 elf_linker_section_t *lsect,
7392 struct elf_link_hash_entry *h,
7393 bfd_vma relocation,
7394 const Elf_Internal_Rela *rel)
7395 {
7396 elf_linker_section_pointers_t *linker_section_ptr;
7397
7398 BFD_ASSERT (lsect != NULL);
7399
7400 if (h != NULL)
7401 {
7402 /* Handle global symbol. */
7403 struct ppc_elf_link_hash_entry *eh;
7404
7405 eh = (struct ppc_elf_link_hash_entry *) h;
7406 BFD_ASSERT (eh->elf.def_regular);
7407 linker_section_ptr = eh->linker_section_pointer;
7408 }
7409 else
7410 {
7411 /* Handle local symbol. */
7412 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7413
7414 BFD_ASSERT (is_ppc_elf (input_bfd));
7415 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7416 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7417 }
7418
7419 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7420 rel->r_addend,
7421 lsect);
7422 BFD_ASSERT (linker_section_ptr != NULL);
7423
7424 /* Offset will always be a multiple of four, so use the bottom bit
7425 as a "written" flag. */
7426 if ((linker_section_ptr->offset & 1) == 0)
7427 {
7428 bfd_put_32 (lsect->section->owner,
7429 relocation + linker_section_ptr->addend,
7430 lsect->section->contents + linker_section_ptr->offset);
7431 linker_section_ptr->offset += 1;
7432 }
7433
7434 relocation = (lsect->section->output_section->vma
7435 + lsect->section->output_offset
7436 + linker_section_ptr->offset - 1
7437 - SYM_VAL (lsect->sym));
7438
7439 #ifdef DEBUG
7440 fprintf (stderr,
7441 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7442 lsect->name, (long) relocation, (long) relocation);
7443 #endif
7444
7445 return relocation;
7446 }
7447
7448 #define PPC_LO(v) ((v) & 0xffff)
7449 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7450 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7451
7452 static void
7453 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7454 struct bfd_link_info *info)
7455 {
7456 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7457 bfd *output_bfd = info->output_bfd;
7458 bfd_vma plt;
7459
7460 plt = ((ent->plt.offset & ~1)
7461 + plt_sec->output_section->vma
7462 + plt_sec->output_offset);
7463
7464 if (bfd_link_pic (info))
7465 {
7466 bfd_vma got = 0;
7467
7468 if (ent->addend >= 32768)
7469 got = (ent->addend
7470 + ent->sec->output_section->vma
7471 + ent->sec->output_offset);
7472 else if (htab->elf.hgot != NULL)
7473 got = SYM_VAL (htab->elf.hgot);
7474
7475 plt -= got;
7476
7477 if (plt + 0x8000 < 0x10000)
7478 {
7479 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7480 p += 4;
7481 bfd_put_32 (output_bfd, MTCTR_11, p);
7482 p += 4;
7483 bfd_put_32 (output_bfd, BCTR, p);
7484 p += 4;
7485 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7486 p += 4;
7487 }
7488 else
7489 {
7490 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7491 p += 4;
7492 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7493 p += 4;
7494 bfd_put_32 (output_bfd, MTCTR_11, p);
7495 p += 4;
7496 bfd_put_32 (output_bfd, BCTR, p);
7497 p += 4;
7498 }
7499 }
7500 else
7501 {
7502 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7503 p += 4;
7504 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7505 p += 4;
7506 bfd_put_32 (output_bfd, MTCTR_11, p);
7507 p += 4;
7508 bfd_put_32 (output_bfd, BCTR, p);
7509 p += 4;
7510 }
7511 }
7512
7513 /* Return true if symbol is defined statically. */
7514
7515 static bfd_boolean
7516 is_static_defined (struct elf_link_hash_entry *h)
7517 {
7518 return ((h->root.type == bfd_link_hash_defined
7519 || h->root.type == bfd_link_hash_defweak)
7520 && h->root.u.def.section != NULL
7521 && h->root.u.def.section->output_section != NULL);
7522 }
7523
7524 /* If INSN is an opcode that may be used with an @tls operand, return
7525 the transformed insn for TLS optimisation, otherwise return 0. If
7526 REG is non-zero only match an insn with RB or RA equal to REG. */
7527
7528 unsigned int
7529 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7530 {
7531 unsigned int rtra;
7532
7533 if ((insn & (0x3f << 26)) != 31 << 26)
7534 return 0;
7535
7536 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7537 rtra = insn & ((1 << 26) - (1 << 16));
7538 else if (((insn >> 16) & 0x1f) == reg)
7539 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7540 else
7541 return 0;
7542
7543 if ((insn & (0x3ff << 1)) == 266 << 1)
7544 /* add -> addi. */
7545 insn = 14 << 26;
7546 else if ((insn & (0x1f << 1)) == 23 << 1
7547 && ((insn & (0x1f << 6)) < 14 << 6
7548 || ((insn & (0x1f << 6)) >= 16 << 6
7549 && (insn & (0x1f << 6)) < 24 << 6)))
7550 /* load and store indexed -> dform. */
7551 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7552 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7553 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7554 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7555 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7556 /* lwax -> lwa. */
7557 insn = (58 << 26) | 2;
7558 else
7559 return 0;
7560 insn |= rtra;
7561 return insn;
7562 }
7563
7564 /* If INSN is an opcode that may be used with an @tprel operand, return
7565 the transformed insn for an undefined weak symbol, ie. with the
7566 thread pointer REG operand removed. Otherwise return 0. */
7567
7568 unsigned int
7569 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7570 {
7571 if ((insn & (0x1f << 16)) == reg << 16
7572 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7573 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7574 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7575 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7576 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7577 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7578 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7579 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7580 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7581 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7582 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7583 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7584 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7585 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7586 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7587 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7588 && (insn & 3) != 1)
7589 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7590 && ((insn & 3) == 0 || (insn & 3) == 3))))
7591 {
7592 insn &= ~(0x1f << 16);
7593 }
7594 else if ((insn & (0x1f << 21)) == reg << 21
7595 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7596 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7597 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7598 {
7599 insn &= ~(0x1f << 21);
7600 insn |= (insn & (0x1f << 16)) << 5;
7601 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7602 insn -= 2 >> 26; /* convert to ori,oris */
7603 }
7604 else
7605 insn = 0;
7606 return insn;
7607 }
7608
7609 static bfd_boolean
7610 is_insn_ds_form (unsigned int insn)
7611 {
7612 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7613 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7614 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7615 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7616 }
7617
7618 static bfd_boolean
7619 is_insn_dq_form (unsigned int insn)
7620 {
7621 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7622 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7623 && (insn & 3) == 1));
7624 }
7625
7626 /* The RELOCATE_SECTION function is called by the ELF backend linker
7627 to handle the relocations for a section.
7628
7629 The relocs are always passed as Rela structures; if the section
7630 actually uses Rel structures, the r_addend field will always be
7631 zero.
7632
7633 This function is responsible for adjust the section contents as
7634 necessary, and (if using Rela relocs and generating a
7635 relocatable output file) adjusting the reloc addend as
7636 necessary.
7637
7638 This function does not have to worry about setting the reloc
7639 address or the reloc symbol index.
7640
7641 LOCAL_SYMS is a pointer to the swapped in local symbols.
7642
7643 LOCAL_SECTIONS is an array giving the section in the input file
7644 corresponding to the st_shndx field of each local symbol.
7645
7646 The global hash table entry for the global symbols can be found
7647 via elf_sym_hashes (input_bfd).
7648
7649 When generating relocatable output, this function must handle
7650 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7651 going to be the section symbol corresponding to the output
7652 section, which means that the addend must be adjusted
7653 accordingly. */
7654
7655 static bfd_boolean
7656 ppc_elf_relocate_section (bfd *output_bfd,
7657 struct bfd_link_info *info,
7658 bfd *input_bfd,
7659 asection *input_section,
7660 bfd_byte *contents,
7661 Elf_Internal_Rela *relocs,
7662 Elf_Internal_Sym *local_syms,
7663 asection **local_sections)
7664 {
7665 Elf_Internal_Shdr *symtab_hdr;
7666 struct elf_link_hash_entry **sym_hashes;
7667 struct ppc_elf_link_hash_table *htab;
7668 Elf_Internal_Rela *rel;
7669 Elf_Internal_Rela *wrel;
7670 Elf_Internal_Rela *relend;
7671 Elf_Internal_Rela outrel;
7672 asection *got2;
7673 bfd_vma *local_got_offsets;
7674 bfd_boolean ret = TRUE;
7675 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7676 bfd_boolean is_vxworks_tls;
7677 unsigned int picfixup_size = 0;
7678 struct ppc_elf_relax_info *relax_info = NULL;
7679
7680 #ifdef DEBUG
7681 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7682 "%ld relocations%s",
7683 input_bfd, input_section,
7684 (long) input_section->reloc_count,
7685 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7686 #endif
7687
7688 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7689
7690 /* Initialize howto table if not already done. */
7691 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7692 ppc_elf_howto_init ();
7693
7694 htab = ppc_elf_hash_table (info);
7695 local_got_offsets = elf_local_got_offsets (input_bfd);
7696 symtab_hdr = &elf_symtab_hdr (input_bfd);
7697 sym_hashes = elf_sym_hashes (input_bfd);
7698 /* We have to handle relocations in vxworks .tls_vars sections
7699 specially, because the dynamic loader is 'weird'. */
7700 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7701 && !strcmp (input_section->output_section->name,
7702 ".tls_vars"));
7703 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7704 relax_info = elf_section_data (input_section)->sec_info;
7705 rel = wrel = relocs;
7706 relend = relocs + input_section->reloc_count;
7707 for (; rel < relend; wrel++, rel++)
7708 {
7709 enum elf_ppc_reloc_type r_type;
7710 bfd_vma addend;
7711 bfd_reloc_status_type r;
7712 Elf_Internal_Sym *sym;
7713 asection *sec;
7714 struct elf_link_hash_entry *h;
7715 const char *sym_name;
7716 reloc_howto_type *howto;
7717 unsigned long r_symndx;
7718 bfd_vma relocation;
7719 bfd_vma branch_bit, from;
7720 bfd_boolean unresolved_reloc;
7721 bfd_boolean warned;
7722 unsigned int tls_type, tls_mask, tls_gd;
7723 struct plt_entry **ifunc;
7724 struct reloc_howto_struct alt_howto;
7725
7726 again:
7727 r_type = ELF32_R_TYPE (rel->r_info);
7728 sym = NULL;
7729 sec = NULL;
7730 h = NULL;
7731 unresolved_reloc = FALSE;
7732 warned = FALSE;
7733 r_symndx = ELF32_R_SYM (rel->r_info);
7734
7735 if (r_symndx < symtab_hdr->sh_info)
7736 {
7737 sym = local_syms + r_symndx;
7738 sec = local_sections[r_symndx];
7739 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7740
7741 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7742 }
7743 else
7744 {
7745 bfd_boolean ignored;
7746
7747 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7748 r_symndx, symtab_hdr, sym_hashes,
7749 h, sec, relocation,
7750 unresolved_reloc, warned, ignored);
7751
7752 sym_name = h->root.root.string;
7753 }
7754
7755 if (sec != NULL && discarded_section (sec))
7756 {
7757 /* For relocs against symbols from removed linkonce sections,
7758 or sections discarded by a linker script, we just want the
7759 section contents zeroed. Avoid any special processing. */
7760 howto = NULL;
7761 if (r_type < R_PPC_max)
7762 howto = ppc_elf_howto_table[r_type];
7763
7764 _bfd_clear_contents (howto, input_bfd, input_section,
7765 contents + rel->r_offset);
7766 wrel->r_offset = rel->r_offset;
7767 wrel->r_info = 0;
7768 wrel->r_addend = 0;
7769
7770 /* For ld -r, remove relocations in debug sections against
7771 symbols defined in discarded sections. Not done for
7772 non-debug to preserve relocs in .eh_frame which the
7773 eh_frame editing code expects to be present. */
7774 if (bfd_link_relocatable (info)
7775 && (input_section->flags & SEC_DEBUGGING))
7776 wrel--;
7777
7778 continue;
7779 }
7780
7781 if (bfd_link_relocatable (info))
7782 {
7783 if (got2 != NULL
7784 && r_type == R_PPC_PLTREL24
7785 && rel->r_addend != 0)
7786 {
7787 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7788 addend specifies the GOT pointer offset within .got2. */
7789 rel->r_addend += got2->output_offset;
7790 }
7791 if (r_type != R_PPC_RELAX_PLT
7792 && r_type != R_PPC_RELAX_PLTREL24
7793 && r_type != R_PPC_RELAX)
7794 goto copy_reloc;
7795 }
7796
7797 /* TLS optimizations. Replace instruction sequences and relocs
7798 based on information we collected in tls_optimize. We edit
7799 RELOCS so that --emit-relocs will output something sensible
7800 for the final instruction stream. */
7801 tls_mask = 0;
7802 tls_gd = 0;
7803 if (h != NULL)
7804 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7805 else if (local_got_offsets != NULL)
7806 {
7807 struct plt_entry **local_plt;
7808 char *lgot_masks;
7809 local_plt
7810 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7811 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7812 tls_mask = lgot_masks[r_symndx];
7813 }
7814
7815 /* Ensure reloc mapping code below stays sane. */
7816 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7817 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7818 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7819 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7820 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7821 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7822 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7823 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7824 abort ();
7825 switch (r_type)
7826 {
7827 default:
7828 break;
7829
7830 case R_PPC_GOT_TPREL16:
7831 case R_PPC_GOT_TPREL16_LO:
7832 if ((tls_mask & TLS_TLS) != 0
7833 && (tls_mask & TLS_TPREL) == 0)
7834 {
7835 bfd_vma insn;
7836
7837 insn = bfd_get_32 (input_bfd,
7838 contents + rel->r_offset - d_offset);
7839 insn &= 31 << 21;
7840 insn |= 0x3c020000; /* addis 0,2,0 */
7841 bfd_put_32 (input_bfd, insn,
7842 contents + rel->r_offset - d_offset);
7843 r_type = R_PPC_TPREL16_HA;
7844 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7845 }
7846 break;
7847
7848 case R_PPC_TLS:
7849 if ((tls_mask & TLS_TLS) != 0
7850 && (tls_mask & TLS_TPREL) == 0)
7851 {
7852 bfd_vma insn;
7853
7854 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
7855 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7856 if (insn == 0)
7857 abort ();
7858 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
7859 r_type = R_PPC_TPREL16_LO;
7860 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7861
7862 /* Was PPC_TLS which sits on insn boundary, now
7863 PPC_TPREL16_LO which is at low-order half-word. */
7864 rel->r_offset += d_offset;
7865 }
7866 break;
7867
7868 case R_PPC_GOT_TLSGD16_HI:
7869 case R_PPC_GOT_TLSGD16_HA:
7870 tls_gd = TLS_TPRELGD;
7871 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7872 goto tls_gdld_hi;
7873 break;
7874
7875 case R_PPC_GOT_TLSLD16_HI:
7876 case R_PPC_GOT_TLSLD16_HA:
7877 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7878 {
7879 tls_gdld_hi:
7880 if ((tls_mask & tls_gd) != 0)
7881 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7882 + R_PPC_GOT_TPREL16);
7883 else
7884 {
7885 rel->r_offset -= d_offset;
7886 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
7887 r_type = R_PPC_NONE;
7888 }
7889 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7890 }
7891 break;
7892
7893 case R_PPC_GOT_TLSGD16:
7894 case R_PPC_GOT_TLSGD16_LO:
7895 tls_gd = TLS_TPRELGD;
7896 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7897 goto tls_ldgd_opt;
7898 break;
7899
7900 case R_PPC_GOT_TLSLD16:
7901 case R_PPC_GOT_TLSLD16_LO:
7902 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7903 {
7904 unsigned int insn1, insn2;
7905 bfd_vma offset;
7906
7907 tls_ldgd_opt:
7908 offset = (bfd_vma) -1;
7909 /* If not using the newer R_PPC_TLSGD/LD to mark
7910 __tls_get_addr calls, we must trust that the call
7911 stays with its arg setup insns, ie. that the next
7912 reloc is the __tls_get_addr call associated with
7913 the current reloc. Edit both insns. */
7914 if (input_section->has_tls_get_addr_call
7915 && rel + 1 < relend
7916 && branch_reloc_hash_match (input_bfd, rel + 1,
7917 htab->tls_get_addr))
7918 offset = rel[1].r_offset;
7919 /* We read the low GOT_TLS insn because we need to keep
7920 the destination reg. It may be something other than
7921 the usual r3, and moved to r3 before the call by
7922 intervening code. */
7923 insn1 = bfd_get_32 (input_bfd,
7924 contents + rel->r_offset - d_offset);
7925 if ((tls_mask & tls_gd) != 0)
7926 {
7927 /* IE */
7928 insn1 &= (0x1f << 21) | (0x1f << 16);
7929 insn1 |= 32 << 26; /* lwz */
7930 if (offset != (bfd_vma) -1)
7931 {
7932 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7933 insn2 = 0x7c631214; /* add 3,3,2 */
7934 bfd_put_32 (input_bfd, insn2, contents + offset);
7935 }
7936 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7937 + R_PPC_GOT_TPREL16);
7938 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7939 }
7940 else
7941 {
7942 /* LE */
7943 insn1 &= 0x1f << 21;
7944 insn1 |= 0x3c020000; /* addis r,2,0 */
7945 if (tls_gd == 0)
7946 {
7947 /* Was an LD reloc. */
7948 for (r_symndx = 0;
7949 r_symndx < symtab_hdr->sh_info;
7950 r_symndx++)
7951 if (local_sections[r_symndx] == sec)
7952 break;
7953 if (r_symndx >= symtab_hdr->sh_info)
7954 r_symndx = STN_UNDEF;
7955 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7956 if (r_symndx != STN_UNDEF)
7957 rel->r_addend -= (local_syms[r_symndx].st_value
7958 + sec->output_offset
7959 + sec->output_section->vma);
7960 }
7961 r_type = R_PPC_TPREL16_HA;
7962 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7963 if (offset != (bfd_vma) -1)
7964 {
7965 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7966 rel[1].r_offset = offset + d_offset;
7967 rel[1].r_addend = rel->r_addend;
7968 insn2 = 0x38630000; /* addi 3,3,0 */
7969 bfd_put_32 (input_bfd, insn2, contents + offset);
7970 }
7971 }
7972 bfd_put_32 (input_bfd, insn1,
7973 contents + rel->r_offset - d_offset);
7974 if (tls_gd == 0)
7975 {
7976 /* We changed the symbol on an LD reloc. Start over
7977 in order to get h, sym, sec etc. right. */
7978 goto again;
7979 }
7980 }
7981 break;
7982
7983 case R_PPC_TLSGD:
7984 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7985 {
7986 unsigned int insn2;
7987 bfd_vma offset = rel->r_offset;
7988
7989 if ((tls_mask & TLS_TPRELGD) != 0)
7990 {
7991 /* IE */
7992 r_type = R_PPC_NONE;
7993 insn2 = 0x7c631214; /* add 3,3,2 */
7994 }
7995 else
7996 {
7997 /* LE */
7998 r_type = R_PPC_TPREL16_LO;
7999 rel->r_offset += d_offset;
8000 insn2 = 0x38630000; /* addi 3,3,0 */
8001 }
8002 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8003 bfd_put_32 (input_bfd, insn2, contents + offset);
8004 /* Zap the reloc on the _tls_get_addr call too. */
8005 BFD_ASSERT (offset == rel[1].r_offset);
8006 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8007 }
8008 break;
8009
8010 case R_PPC_TLSLD:
8011 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8012 {
8013 unsigned int insn2;
8014
8015 for (r_symndx = 0;
8016 r_symndx < symtab_hdr->sh_info;
8017 r_symndx++)
8018 if (local_sections[r_symndx] == sec)
8019 break;
8020 if (r_symndx >= symtab_hdr->sh_info)
8021 r_symndx = STN_UNDEF;
8022 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8023 if (r_symndx != STN_UNDEF)
8024 rel->r_addend -= (local_syms[r_symndx].st_value
8025 + sec->output_offset
8026 + sec->output_section->vma);
8027
8028 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8029 rel->r_offset += d_offset;
8030 insn2 = 0x38630000; /* addi 3,3,0 */
8031 bfd_put_32 (input_bfd, insn2,
8032 contents + rel->r_offset - d_offset);
8033 /* Zap the reloc on the _tls_get_addr call too. */
8034 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8035 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8036 goto again;
8037 }
8038 break;
8039 }
8040
8041 /* Handle other relocations that tweak non-addend part of insn. */
8042 branch_bit = 0;
8043 switch (r_type)
8044 {
8045 default:
8046 break;
8047
8048 /* Branch taken prediction relocations. */
8049 case R_PPC_ADDR14_BRTAKEN:
8050 case R_PPC_REL14_BRTAKEN:
8051 branch_bit = BRANCH_PREDICT_BIT;
8052 /* Fall through. */
8053
8054 /* Branch not taken prediction relocations. */
8055 case R_PPC_ADDR14_BRNTAKEN:
8056 case R_PPC_REL14_BRNTAKEN:
8057 {
8058 bfd_vma insn;
8059
8060 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8061 insn &= ~BRANCH_PREDICT_BIT;
8062 insn |= branch_bit;
8063
8064 from = (rel->r_offset
8065 + input_section->output_offset
8066 + input_section->output_section->vma);
8067
8068 /* Invert 'y' bit if not the default. */
8069 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8070 insn ^= BRANCH_PREDICT_BIT;
8071
8072 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8073 break;
8074 }
8075 }
8076
8077 if (ELIMINATE_COPY_RELOCS
8078 && h != NULL
8079 && !h->def_regular
8080 && h->protected_def
8081 && ppc_elf_hash_entry (h)->has_addr16_ha
8082 && ppc_elf_hash_entry (h)->has_addr16_lo
8083 && htab->params->pic_fixup > 0)
8084 {
8085 /* Convert lis;addi or lis;load/store accessing a protected
8086 variable defined in a shared library to PIC. */
8087 unsigned int insn;
8088
8089 if (r_type == R_PPC_ADDR16_HA)
8090 {
8091 insn = bfd_get_32 (input_bfd,
8092 contents + rel->r_offset - d_offset);
8093 if ((insn & (0x3f << 26)) == (15u << 26)
8094 && (insn & (0x1f << 16)) == 0 /* lis */)
8095 {
8096 bfd_byte *p;
8097 bfd_vma off;
8098 bfd_vma got_addr;
8099
8100 p = (contents + input_section->size
8101 - relax_info->workaround_size
8102 - relax_info->picfixup_size
8103 + picfixup_size);
8104 off = (p - contents) - (rel->r_offset - d_offset);
8105 if (off > 0x1fffffc || (off & 3) != 0)
8106 info->callbacks->einfo
8107 (_("%H: fixup branch overflow\n"),
8108 input_bfd, input_section, rel->r_offset);
8109
8110 bfd_put_32 (input_bfd, B | off,
8111 contents + rel->r_offset - d_offset);
8112 got_addr = (htab->elf.sgot->output_section->vma
8113 + htab->elf.sgot->output_offset
8114 + (h->got.offset & ~1));
8115 wrel->r_offset = (p - contents) + d_offset;
8116 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8117 wrel->r_addend = got_addr;
8118 insn &= ~0xffff;
8119 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8120 bfd_put_32 (input_bfd, insn, p);
8121
8122 /* Convert lis to lwz, loading address from GOT. */
8123 insn &= ~0xffff;
8124 insn ^= (32u ^ 15u) << 26;
8125 insn |= (insn & (0x1f << 21)) >> 5;
8126 insn |= got_addr & 0xffff;
8127 bfd_put_32 (input_bfd, insn, p + 4);
8128
8129 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8130 picfixup_size += 12;
8131
8132 /* Use one of the spare relocs, so --emit-relocs
8133 output is reasonable. */
8134 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8135 wrel++, rel++;
8136 rel->r_offset = wrel[-1].r_offset + 4;
8137 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8138 rel->r_addend = wrel[-1].r_addend;
8139
8140 /* Continue on as if we had a got reloc, to output
8141 dynamic reloc. */
8142 r_type = R_PPC_GOT16_LO;
8143 }
8144 else
8145 _bfd_error_handler
8146 /* xgettext:c-format */
8147 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8148 input_bfd, input_section, rel->r_offset,
8149 "R_PPC_ADDR16_HA", insn);
8150 }
8151 else if (r_type == R_PPC_ADDR16_LO)
8152 {
8153 insn = bfd_get_32 (input_bfd,
8154 contents + rel->r_offset - d_offset);
8155 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8156 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8157 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8158 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8159 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8160 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8161 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8162 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8163 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8164 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8165 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8166 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8167 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8168 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8169 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8170 && (insn & 3) != 1)
8171 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8172 && ((insn & 3) == 0 || (insn & 3) == 3)))
8173 {
8174 /* Arrange to apply the reloc addend, if any. */
8175 relocation = 0;
8176 unresolved_reloc = FALSE;
8177 rel->r_info = ELF32_R_INFO (0, r_type);
8178 }
8179 else
8180 _bfd_error_handler
8181 /* xgettext:c-format */
8182 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8183 input_bfd, input_section, rel->r_offset,
8184 "R_PPC_ADDR16_LO", insn);
8185 }
8186 }
8187
8188 ifunc = NULL;
8189 if (!htab->is_vxworks)
8190 {
8191 struct plt_entry *ent;
8192
8193 if (h != NULL)
8194 {
8195 if (h->type == STT_GNU_IFUNC)
8196 ifunc = &h->plt.plist;
8197 }
8198 else if (local_got_offsets != NULL
8199 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8200 {
8201 struct plt_entry **local_plt;
8202
8203 local_plt = (struct plt_entry **) (local_got_offsets
8204 + symtab_hdr->sh_info);
8205 ifunc = local_plt + r_symndx;
8206 }
8207
8208 ent = NULL;
8209 if (ifunc != NULL
8210 && (!bfd_link_pic (info)
8211 || is_branch_reloc (r_type)))
8212 {
8213 addend = 0;
8214 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8215 addend = rel->r_addend;
8216 ent = find_plt_ent (ifunc, got2, addend);
8217 }
8218 if (ent != NULL)
8219 {
8220 if (bfd_link_pic (info)
8221 && ent->sec != got2
8222 && htab->plt_type != PLT_NEW
8223 && (!htab->elf.dynamic_sections_created
8224 || h == NULL
8225 || h->dynindx == -1))
8226 {
8227 /* Uh oh, we are going to create a pic glink stub
8228 for an ifunc (here for h == NULL and later in
8229 finish_dynamic_symbol for h != NULL), and
8230 apparently are using code compiled with
8231 -mbss-plt. The difficulty is that -mbss-plt code
8232 gives no indication via a magic PLTREL24 addend
8233 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8234 is pointing into a .got2 section (and how far
8235 into .got2). */
8236 info->callbacks->einfo
8237 /* xgettext:c-format */
8238 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8239 input_bfd, input_section, rel->r_offset, sym_name);
8240 }
8241 if (h == NULL && (ent->plt.offset & 1) == 0)
8242 {
8243 Elf_Internal_Rela rela;
8244 bfd_byte *loc;
8245
8246 rela.r_offset = (htab->elf.iplt->output_section->vma
8247 + htab->elf.iplt->output_offset
8248 + ent->plt.offset);
8249 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8250 rela.r_addend = relocation;
8251 loc = htab->elf.irelplt->contents;
8252 loc += (htab->elf.irelplt->reloc_count++
8253 * sizeof (Elf32_External_Rela));
8254 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8255 htab->local_ifunc_resolver = 1;
8256
8257 ent->plt.offset |= 1;
8258 }
8259 if (h == NULL && (ent->glink_offset & 1) == 0)
8260 {
8261 unsigned char *p = ((unsigned char *) htab->glink->contents
8262 + ent->glink_offset);
8263 write_glink_stub (ent, htab->elf.iplt, p, info);
8264 ent->glink_offset |= 1;
8265 }
8266
8267 unresolved_reloc = FALSE;
8268 if (htab->plt_type == PLT_NEW
8269 || !htab->elf.dynamic_sections_created
8270 || h == NULL
8271 || h->dynindx == -1)
8272 relocation = (htab->glink->output_section->vma
8273 + htab->glink->output_offset
8274 + (ent->glink_offset & ~1));
8275 else
8276 relocation = (htab->elf.splt->output_section->vma
8277 + htab->elf.splt->output_offset
8278 + ent->plt.offset);
8279 }
8280 }
8281
8282 addend = rel->r_addend;
8283 howto = NULL;
8284 if (r_type < R_PPC_max)
8285 howto = ppc_elf_howto_table[r_type];
8286
8287 switch (r_type)
8288 {
8289 default:
8290 break;
8291
8292 case R_PPC_TPREL16_HA:
8293 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8294 {
8295 bfd_byte *p = contents + (rel->r_offset & ~3);
8296 unsigned int insn = bfd_get_32 (input_bfd, p);
8297 if ((insn & ((0x3f << 26) | 0x1f << 16))
8298 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8299 /* xgettext:c-format */
8300 info->callbacks->minfo
8301 (_("%H: warning: %s unexpected insn %#x.\n"),
8302 input_bfd, input_section, rel->r_offset, howto->name, insn);
8303 else
8304 bfd_put_32 (input_bfd, NOP, p);
8305 }
8306 break;
8307
8308 case R_PPC_TPREL16_LO:
8309 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8310 {
8311 bfd_byte *p = contents + (rel->r_offset & ~3);
8312 unsigned int insn = bfd_get_32 (input_bfd, p);
8313 insn &= ~(0x1f << 16);
8314 insn |= 2 << 16;
8315 bfd_put_32 (input_bfd, insn, p);
8316 }
8317 break;
8318 }
8319
8320 tls_type = 0;
8321 switch (r_type)
8322 {
8323 default:
8324 info->callbacks->einfo
8325 /* xgettext:c-format */
8326 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8327 input_bfd, (int) r_type, sym_name);
8328
8329 bfd_set_error (bfd_error_bad_value);
8330 ret = FALSE;
8331 goto copy_reloc;
8332
8333 case R_PPC_NONE:
8334 case R_PPC_TLS:
8335 case R_PPC_TLSGD:
8336 case R_PPC_TLSLD:
8337 case R_PPC_EMB_MRKREF:
8338 case R_PPC_GNU_VTINHERIT:
8339 case R_PPC_GNU_VTENTRY:
8340 goto copy_reloc;
8341
8342 /* GOT16 relocations. Like an ADDR16 using the symbol's
8343 address in the GOT as relocation value instead of the
8344 symbol's value itself. Also, create a GOT entry for the
8345 symbol and put the symbol value there. */
8346 case R_PPC_GOT_TLSGD16:
8347 case R_PPC_GOT_TLSGD16_LO:
8348 case R_PPC_GOT_TLSGD16_HI:
8349 case R_PPC_GOT_TLSGD16_HA:
8350 tls_type = TLS_TLS | TLS_GD;
8351 goto dogot;
8352
8353 case R_PPC_GOT_TLSLD16:
8354 case R_PPC_GOT_TLSLD16_LO:
8355 case R_PPC_GOT_TLSLD16_HI:
8356 case R_PPC_GOT_TLSLD16_HA:
8357 tls_type = TLS_TLS | TLS_LD;
8358 goto dogot;
8359
8360 case R_PPC_GOT_TPREL16:
8361 case R_PPC_GOT_TPREL16_LO:
8362 case R_PPC_GOT_TPREL16_HI:
8363 case R_PPC_GOT_TPREL16_HA:
8364 tls_type = TLS_TLS | TLS_TPREL;
8365 goto dogot;
8366
8367 case R_PPC_GOT_DTPREL16:
8368 case R_PPC_GOT_DTPREL16_LO:
8369 case R_PPC_GOT_DTPREL16_HI:
8370 case R_PPC_GOT_DTPREL16_HA:
8371 tls_type = TLS_TLS | TLS_DTPREL;
8372 goto dogot;
8373
8374 case R_PPC_GOT16:
8375 case R_PPC_GOT16_LO:
8376 case R_PPC_GOT16_HI:
8377 case R_PPC_GOT16_HA:
8378 tls_mask = 0;
8379 dogot:
8380 {
8381 /* Relocation is to the entry for this symbol in the global
8382 offset table. */
8383 bfd_vma off;
8384 bfd_vma *offp;
8385 unsigned long indx;
8386
8387 if (htab->elf.sgot == NULL)
8388 abort ();
8389
8390 indx = 0;
8391 if (tls_type == (TLS_TLS | TLS_LD)
8392 && (h == NULL
8393 || !h->def_dynamic))
8394 offp = &htab->tlsld_got.offset;
8395 else if (h != NULL)
8396 {
8397 if (!htab->elf.dynamic_sections_created
8398 || h->dynindx == -1
8399 || SYMBOL_REFERENCES_LOCAL (info, h)
8400 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8401 /* This is actually a static link, or it is a
8402 -Bsymbolic link and the symbol is defined
8403 locally, or the symbol was forced to be local
8404 because of a version file. */
8405 ;
8406 else
8407 {
8408 indx = h->dynindx;
8409 unresolved_reloc = FALSE;
8410 }
8411 offp = &h->got.offset;
8412 }
8413 else
8414 {
8415 if (local_got_offsets == NULL)
8416 abort ();
8417 offp = &local_got_offsets[r_symndx];
8418 }
8419
8420 /* The offset must always be a multiple of 4. We use the
8421 least significant bit to record whether we have already
8422 processed this entry. */
8423 off = *offp;
8424 if ((off & 1) != 0)
8425 off &= ~1;
8426 else
8427 {
8428 unsigned int tls_m = (tls_mask
8429 & (TLS_LD | TLS_GD | TLS_DTPREL
8430 | TLS_TPREL | TLS_TPRELGD));
8431
8432 if (offp == &htab->tlsld_got.offset)
8433 tls_m = TLS_LD;
8434 else if (h == NULL
8435 || !h->def_dynamic)
8436 tls_m &= ~TLS_LD;
8437
8438 /* We might have multiple got entries for this sym.
8439 Initialize them all. */
8440 do
8441 {
8442 int tls_ty = 0;
8443
8444 if ((tls_m & TLS_LD) != 0)
8445 {
8446 tls_ty = TLS_TLS | TLS_LD;
8447 tls_m &= ~TLS_LD;
8448 }
8449 else if ((tls_m & TLS_GD) != 0)
8450 {
8451 tls_ty = TLS_TLS | TLS_GD;
8452 tls_m &= ~TLS_GD;
8453 }
8454 else if ((tls_m & TLS_DTPREL) != 0)
8455 {
8456 tls_ty = TLS_TLS | TLS_DTPREL;
8457 tls_m &= ~TLS_DTPREL;
8458 }
8459 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8460 {
8461 tls_ty = TLS_TLS | TLS_TPREL;
8462 tls_m = 0;
8463 }
8464
8465 /* Generate relocs for the dynamic linker. */
8466 if (indx != 0
8467 || (bfd_link_pic (info)
8468 && (h == NULL
8469 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8470 || offp == &htab->tlsld_got.offset)
8471 && !(tls_ty == (TLS_TLS | TLS_TPREL)
8472 && bfd_link_executable (info)
8473 && SYMBOL_REFERENCES_LOCAL (info, h))))
8474 {
8475 asection *rsec = htab->elf.srelgot;
8476 bfd_byte * loc;
8477
8478 if (ifunc != NULL)
8479 {
8480 rsec = htab->elf.irelplt;
8481 if (indx == 0)
8482 htab->local_ifunc_resolver = 1;
8483 else if (is_static_defined (h))
8484 htab->maybe_local_ifunc_resolver = 1;
8485 }
8486 outrel.r_offset = (htab->elf.sgot->output_section->vma
8487 + htab->elf.sgot->output_offset
8488 + off);
8489 outrel.r_addend = 0;
8490 if (tls_ty & (TLS_LD | TLS_GD))
8491 {
8492 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8493 if (tls_ty == (TLS_TLS | TLS_GD))
8494 {
8495 loc = rsec->contents;
8496 loc += (rsec->reloc_count++
8497 * sizeof (Elf32_External_Rela));
8498 bfd_elf32_swap_reloca_out (output_bfd,
8499 &outrel, loc);
8500 outrel.r_offset += 4;
8501 outrel.r_info
8502 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8503 }
8504 }
8505 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8506 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8507 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8508 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8509 else if (indx != 0)
8510 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8511 else if (ifunc != NULL)
8512 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8513 else
8514 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8515 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8516 {
8517 outrel.r_addend += relocation;
8518 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8519 {
8520 if (htab->elf.tls_sec == NULL)
8521 outrel.r_addend = 0;
8522 else
8523 outrel.r_addend -= htab->elf.tls_sec->vma;
8524 }
8525 }
8526 loc = rsec->contents;
8527 loc += (rsec->reloc_count++
8528 * sizeof (Elf32_External_Rela));
8529 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8530 }
8531
8532 /* Init the .got section contents if we're not
8533 emitting a reloc. */
8534 else
8535 {
8536 bfd_vma value = relocation;
8537
8538 if (tls_ty != 0)
8539 {
8540 if (htab->elf.tls_sec == NULL)
8541 value = 0;
8542 else
8543 {
8544 if (tls_ty & TLS_LD)
8545 value = 0;
8546 else
8547 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8548 if (tls_ty & TLS_TPREL)
8549 value += DTP_OFFSET - TP_OFFSET;
8550 }
8551
8552 if (tls_ty & (TLS_LD | TLS_GD))
8553 {
8554 bfd_put_32 (input_bfd, value,
8555 htab->elf.sgot->contents + off + 4);
8556 value = 1;
8557 }
8558 }
8559 bfd_put_32 (input_bfd, value,
8560 htab->elf.sgot->contents + off);
8561 }
8562
8563 off += 4;
8564 if (tls_ty & (TLS_LD | TLS_GD))
8565 off += 4;
8566 }
8567 while (tls_m != 0);
8568
8569 off = *offp;
8570 *offp = off | 1;
8571 }
8572
8573 if (off >= (bfd_vma) -2)
8574 abort ();
8575
8576 if ((tls_type & TLS_TLS) != 0)
8577 {
8578 if (tls_type != (TLS_TLS | TLS_LD))
8579 {
8580 if ((tls_mask & TLS_LD) != 0
8581 && !(h == NULL
8582 || !h->def_dynamic))
8583 off += 8;
8584 if (tls_type != (TLS_TLS | TLS_GD))
8585 {
8586 if ((tls_mask & TLS_GD) != 0)
8587 off += 8;
8588 if (tls_type != (TLS_TLS | TLS_DTPREL))
8589 {
8590 if ((tls_mask & TLS_DTPREL) != 0)
8591 off += 4;
8592 }
8593 }
8594 }
8595 }
8596
8597 /* If here for a picfixup, we're done. */
8598 if (r_type != ELF32_R_TYPE (rel->r_info))
8599 goto copy_reloc;
8600
8601 relocation = (htab->elf.sgot->output_section->vma
8602 + htab->elf.sgot->output_offset
8603 + off
8604 - SYM_VAL (htab->elf.hgot));
8605
8606 /* Addends on got relocations don't make much sense.
8607 x+off@got is actually x@got+off, and since the got is
8608 generated by a hash table traversal, the value in the
8609 got at entry m+n bears little relation to the entry m. */
8610 if (addend != 0)
8611 info->callbacks->einfo
8612 /* xgettext:c-format */
8613 (_("%H: non-zero addend on %s reloc against `%s'\n"),
8614 input_bfd, input_section, rel->r_offset,
8615 howto->name,
8616 sym_name);
8617 }
8618 break;
8619
8620 /* Relocations that need no special processing. */
8621 case R_PPC_LOCAL24PC:
8622 /* It makes no sense to point a local relocation
8623 at a symbol not in this object. */
8624 if (unresolved_reloc)
8625 {
8626 (*info->callbacks->undefined_symbol) (info,
8627 h->root.root.string,
8628 input_bfd,
8629 input_section,
8630 rel->r_offset,
8631 TRUE);
8632 goto copy_reloc;
8633 }
8634 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8635 {
8636 /* @local on an ifunc does not really make sense since
8637 the ifunc resolver can take you anywhere. More
8638 seriously, calls to ifuncs must go through a plt call
8639 stub, and for pic the plt call stubs uses r30 to
8640 access the PLT. The problem is that a call that is
8641 local won't have the +32k reloc addend trick marking
8642 -fPIC code, so the linker won't know whether r30 is
8643 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8644 /* xgettext:c-format */
8645 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8646 input_bfd, input_section, rel->r_offset,
8647 h->root.root.string);
8648 }
8649 break;
8650
8651 case R_PPC_DTPREL16:
8652 case R_PPC_DTPREL16_LO:
8653 case R_PPC_DTPREL16_HI:
8654 case R_PPC_DTPREL16_HA:
8655 if (htab->elf.tls_sec != NULL)
8656 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8657 break;
8658
8659 /* Relocations that may need to be propagated if this is a shared
8660 object. */
8661 case R_PPC_TPREL16:
8662 case R_PPC_TPREL16_LO:
8663 case R_PPC_TPREL16_HI:
8664 case R_PPC_TPREL16_HA:
8665 if (h != NULL
8666 && h->root.type == bfd_link_hash_undefweak
8667 && h->dynindx == -1)
8668 {
8669 /* Make this relocation against an undefined weak symbol
8670 resolve to zero. This is really just a tweak, since
8671 code using weak externs ought to check that they are
8672 defined before using them. */
8673 bfd_byte *p = contents + rel->r_offset - d_offset;
8674 unsigned int insn = bfd_get_32 (input_bfd, p);
8675 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8676 if (insn != 0)
8677 bfd_put_32 (input_bfd, insn, p);
8678 break;
8679 }
8680 if (htab->elf.tls_sec != NULL)
8681 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8682 /* The TPREL16 relocs shouldn't really be used in shared
8683 libs or with non-local symbols as that will result in
8684 DT_TEXTREL being set, but support them anyway. */
8685 goto dodyn;
8686
8687 case R_PPC_TPREL32:
8688 if (htab->elf.tls_sec != NULL)
8689 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8690 goto dodyn;
8691
8692 case R_PPC_DTPREL32:
8693 if (htab->elf.tls_sec != NULL)
8694 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8695 goto dodyn;
8696
8697 case R_PPC_DTPMOD32:
8698 relocation = 1;
8699 addend = 0;
8700 goto dodyn;
8701
8702 case R_PPC_REL16:
8703 case R_PPC_REL16_LO:
8704 case R_PPC_REL16_HI:
8705 case R_PPC_REL16_HA:
8706 case R_PPC_REL16DX_HA:
8707 break;
8708
8709 case R_PPC_REL32:
8710 if (h == NULL || h == htab->elf.hgot)
8711 break;
8712 /* fall through */
8713
8714 case R_PPC_ADDR32:
8715 case R_PPC_ADDR16:
8716 case R_PPC_ADDR16_LO:
8717 case R_PPC_ADDR16_HI:
8718 case R_PPC_ADDR16_HA:
8719 case R_PPC_UADDR32:
8720 case R_PPC_UADDR16:
8721 goto dodyn;
8722
8723 case R_PPC_VLE_REL8:
8724 case R_PPC_VLE_REL15:
8725 case R_PPC_VLE_REL24:
8726 case R_PPC_REL24:
8727 case R_PPC_REL14:
8728 case R_PPC_REL14_BRTAKEN:
8729 case R_PPC_REL14_BRNTAKEN:
8730 /* If these relocations are not to a named symbol, they can be
8731 handled right here, no need to bother the dynamic linker. */
8732 if (SYMBOL_CALLS_LOCAL (info, h)
8733 || h == htab->elf.hgot)
8734 break;
8735 /* fall through */
8736
8737 case R_PPC_ADDR24:
8738 case R_PPC_ADDR14:
8739 case R_PPC_ADDR14_BRTAKEN:
8740 case R_PPC_ADDR14_BRNTAKEN:
8741 if (h != NULL && !bfd_link_pic (info))
8742 break;
8743 /* fall through */
8744
8745 dodyn:
8746 if ((input_section->flags & SEC_ALLOC) == 0
8747 || is_vxworks_tls)
8748 break;
8749
8750 if (bfd_link_pic (info)
8751 ? ((h == NULL
8752 || ppc_elf_hash_entry (h)->dyn_relocs != NULL)
8753 && ((h != NULL && pc_dynrelocs (h))
8754 || must_be_dyn_reloc (info, r_type)))
8755 : (h != NULL
8756 && ppc_elf_hash_entry (h)->dyn_relocs != NULL))
8757 {
8758 int skip;
8759 bfd_byte *loc;
8760 asection *sreloc;
8761 long indx = 0;
8762
8763 #ifdef DEBUG
8764 fprintf (stderr, "ppc_elf_relocate_section needs to "
8765 "create relocation for %s\n",
8766 (h && h->root.root.string
8767 ? h->root.root.string : "<unknown>"));
8768 #endif
8769
8770 /* When generating a shared object, these relocations
8771 are copied into the output file to be resolved at run
8772 time. */
8773 skip = 0;
8774 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8775 input_section,
8776 rel->r_offset);
8777 if (outrel.r_offset == (bfd_vma) -1
8778 || outrel.r_offset == (bfd_vma) -2)
8779 skip = (int) outrel.r_offset;
8780 outrel.r_offset += (input_section->output_section->vma
8781 + input_section->output_offset);
8782
8783 if (skip)
8784 memset (&outrel, 0, sizeof outrel);
8785 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
8786 {
8787 indx = h->dynindx;
8788 BFD_ASSERT (indx != -1);
8789 unresolved_reloc = FALSE;
8790 outrel.r_info = ELF32_R_INFO (indx, r_type);
8791 outrel.r_addend = rel->r_addend;
8792 }
8793 else
8794 {
8795 outrel.r_addend = relocation + rel->r_addend;
8796
8797 if (r_type != R_PPC_ADDR32)
8798 {
8799 if (ifunc != NULL)
8800 {
8801 /* If we get here when building a static
8802 executable, then the libc startup function
8803 responsible for applying indirect function
8804 relocations is going to complain about
8805 the reloc type.
8806 If we get here when building a dynamic
8807 executable, it will be because we have
8808 a text relocation. The dynamic loader
8809 will set the text segment writable and
8810 non-executable to apply text relocations.
8811 So we'll segfault when trying to run the
8812 indirection function to resolve the reloc. */
8813 info->callbacks->einfo
8814 /* xgettext:c-format */
8815 (_("%H: relocation %s for indirect "
8816 "function %s unsupported\n"),
8817 input_bfd, input_section, rel->r_offset,
8818 howto->name,
8819 sym_name);
8820 ret = FALSE;
8821 }
8822 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8823 ;
8824 else if (sec == NULL || sec->owner == NULL)
8825 {
8826 bfd_set_error (bfd_error_bad_value);
8827 ret = FALSE;
8828 }
8829 else
8830 {
8831 asection *osec;
8832
8833 /* We are turning this relocation into one
8834 against a section symbol. It would be
8835 proper to subtract the symbol's value,
8836 osec->vma, from the emitted reloc addend,
8837 but ld.so expects buggy relocs.
8838 FIXME: Why not always use a zero index? */
8839 osec = sec->output_section;
8840 indx = elf_section_data (osec)->dynindx;
8841 if (indx == 0)
8842 {
8843 osec = htab->elf.text_index_section;
8844 indx = elf_section_data (osec)->dynindx;
8845 }
8846 BFD_ASSERT (indx != 0);
8847 #ifdef DEBUG
8848 if (indx == 0)
8849 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8850 indx, osec->name, osec->flags,
8851 h->root.root.string);
8852 #endif
8853 }
8854
8855 outrel.r_info = ELF32_R_INFO (indx, r_type);
8856 }
8857 else if (ifunc != NULL)
8858 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8859 else
8860 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8861 }
8862
8863 sreloc = elf_section_data (input_section)->sreloc;
8864 if (ifunc)
8865 {
8866 sreloc = htab->elf.irelplt;
8867 if (indx == 0)
8868 htab->local_ifunc_resolver = 1;
8869 else if (is_static_defined (h))
8870 htab->maybe_local_ifunc_resolver = 1;
8871 }
8872 if (sreloc == NULL)
8873 return FALSE;
8874
8875 loc = sreloc->contents;
8876 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8877 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8878
8879 if (skip == -1)
8880 goto copy_reloc;
8881
8882 /* This reloc will be computed at runtime. Clear the memory
8883 so that it contains a predictable value for prelink. */
8884 if (!skip)
8885 {
8886 relocation = howto->pc_relative ? outrel.r_offset : 0;
8887 addend = 0;
8888 break;
8889 }
8890 }
8891 break;
8892
8893 case R_PPC_RELAX_PLT:
8894 case R_PPC_RELAX_PLTREL24:
8895 if (h != NULL)
8896 {
8897 struct plt_entry *ent;
8898 bfd_vma got2_addend = 0;
8899
8900 if (r_type == R_PPC_RELAX_PLTREL24)
8901 {
8902 if (bfd_link_pic (info))
8903 got2_addend = addend;
8904 addend = 0;
8905 }
8906 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8907 if (htab->plt_type == PLT_NEW)
8908 relocation = (htab->glink->output_section->vma
8909 + htab->glink->output_offset
8910 + ent->glink_offset);
8911 else
8912 relocation = (htab->elf.splt->output_section->vma
8913 + htab->elf.splt->output_offset
8914 + ent->plt.offset);
8915 }
8916 /* Fall through. */
8917
8918 case R_PPC_RELAX:
8919 {
8920 const int *stub;
8921 size_t size;
8922 size_t insn_offset = rel->r_offset;
8923 unsigned int insn;
8924
8925 if (bfd_link_pic (info))
8926 {
8927 relocation -= (input_section->output_section->vma
8928 + input_section->output_offset
8929 + rel->r_offset - 4);
8930 stub = shared_stub_entry;
8931 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
8932 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
8933 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
8934 stub += 3;
8935 size = ARRAY_SIZE (shared_stub_entry) - 3;
8936 }
8937 else
8938 {
8939 stub = stub_entry;
8940 size = ARRAY_SIZE (stub_entry);
8941 }
8942
8943 relocation += addend;
8944 if (bfd_link_relocatable (info))
8945 relocation = 0;
8946
8947 /* First insn is HA, second is LO. */
8948 insn = *stub++;
8949 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8950 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8951 insn_offset += 4;
8952
8953 insn = *stub++;
8954 insn |= relocation & 0xffff;
8955 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8956 insn_offset += 4;
8957 size -= 2;
8958
8959 while (size != 0)
8960 {
8961 insn = *stub++;
8962 --size;
8963 bfd_put_32 (input_bfd, insn, contents + insn_offset);
8964 insn_offset += 4;
8965 }
8966
8967 /* Rewrite the reloc and convert one of the trailing nop
8968 relocs to describe this relocation. */
8969 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8970 /* The relocs are at the bottom 2 bytes */
8971 wrel->r_offset = rel->r_offset + d_offset;
8972 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8973 wrel->r_addend = rel->r_addend;
8974 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
8975 wrel++, rel++;
8976 wrel->r_offset += 4;
8977 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8978 }
8979 continue;
8980
8981 /* Indirect .sdata relocation. */
8982 case R_PPC_EMB_SDAI16:
8983 BFD_ASSERT (htab->sdata[0].section != NULL);
8984 if (!is_static_defined (htab->sdata[0].sym))
8985 {
8986 unresolved_reloc = TRUE;
8987 break;
8988 }
8989 relocation
8990 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8991 h, relocation, rel);
8992 addend = 0;
8993 break;
8994
8995 /* Indirect .sdata2 relocation. */
8996 case R_PPC_EMB_SDA2I16:
8997 BFD_ASSERT (htab->sdata[1].section != NULL);
8998 if (!is_static_defined (htab->sdata[1].sym))
8999 {
9000 unresolved_reloc = TRUE;
9001 break;
9002 }
9003 relocation
9004 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9005 h, relocation, rel);
9006 addend = 0;
9007 break;
9008
9009 /* Handle the TOC16 reloc. We want to use the offset within the .got
9010 section, not the actual VMA. This is appropriate when generating
9011 an embedded ELF object, for which the .got section acts like the
9012 AIX .toc section. */
9013 case R_PPC_TOC16: /* phony GOT16 relocations */
9014 if (sec == NULL || sec->output_section == NULL)
9015 {
9016 unresolved_reloc = TRUE;
9017 break;
9018 }
9019 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9020 ".got") == 0
9021 || strcmp (bfd_get_section_name (sec->owner, sec),
9022 ".cgot") == 0);
9023
9024 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9025 break;
9026
9027 case R_PPC_PLTREL24:
9028 if (h != NULL && ifunc == NULL)
9029 {
9030 struct plt_entry *ent;
9031
9032 ent = find_plt_ent (&h->plt.plist, got2,
9033 bfd_link_pic (info) ? addend : 0);
9034 if (ent == NULL
9035 || htab->elf.splt == NULL)
9036 {
9037 /* We didn't make a PLT entry for this symbol. This
9038 happens when statically linking PIC code, or when
9039 using -Bsymbolic. */
9040 }
9041 else
9042 {
9043 /* Relocation is to the entry for this symbol in the
9044 procedure linkage table. */
9045 unresolved_reloc = FALSE;
9046 if (htab->plt_type == PLT_NEW)
9047 relocation = (htab->glink->output_section->vma
9048 + htab->glink->output_offset
9049 + ent->glink_offset);
9050 else
9051 relocation = (htab->elf.splt->output_section->vma
9052 + htab->elf.splt->output_offset
9053 + ent->plt.offset);
9054 }
9055 }
9056
9057 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9058 addend specifies the GOT pointer offset within .got2.
9059 Don't apply it to the relocation field. */
9060 addend = 0;
9061 break;
9062
9063 /* Relocate against _SDA_BASE_. */
9064 case R_PPC_SDAREL16:
9065 {
9066 const char *name;
9067 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9068
9069 if (sec == NULL
9070 || sec->output_section == NULL
9071 || !is_static_defined (sda))
9072 {
9073 unresolved_reloc = TRUE;
9074 break;
9075 }
9076 addend -= SYM_VAL (sda);
9077
9078 name = bfd_get_section_name (output_bfd, sec->output_section);
9079 if (!(strcmp (name, ".sdata") == 0
9080 || strcmp (name, ".sbss") == 0))
9081 {
9082 info->callbacks->einfo
9083 /* xgettext:c-format */
9084 (_("%P: %B: the target (%s) of a %s relocation is "
9085 "in the wrong output section (%s)\n"),
9086 input_bfd,
9087 sym_name,
9088 howto->name,
9089 name);
9090 }
9091 }
9092 break;
9093
9094 /* Relocate against _SDA2_BASE_. */
9095 case R_PPC_EMB_SDA2REL:
9096 {
9097 const char *name;
9098 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9099
9100 if (sec == NULL
9101 || sec->output_section == NULL
9102 || !is_static_defined (sda))
9103 {
9104 unresolved_reloc = TRUE;
9105 break;
9106 }
9107 addend -= SYM_VAL (sda);
9108
9109 name = bfd_get_section_name (output_bfd, sec->output_section);
9110 if (!(strcmp (name, ".sdata2") == 0
9111 || strcmp (name, ".sbss2") == 0))
9112 {
9113 info->callbacks->einfo
9114 /* xgettext:c-format */
9115 (_("%P: %B: the target (%s) of a %s relocation is "
9116 "in the wrong output section (%s)\n"),
9117 input_bfd,
9118 sym_name,
9119 howto->name,
9120 name);
9121 }
9122 }
9123 break;
9124
9125 case R_PPC_VLE_LO16A:
9126 relocation = relocation + addend;
9127 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9128 contents + rel->r_offset, relocation,
9129 split16a_type, htab->params->vle_reloc_fixup);
9130 goto copy_reloc;
9131
9132 case R_PPC_VLE_LO16D:
9133 relocation = relocation + addend;
9134 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9135 contents + rel->r_offset, relocation,
9136 split16d_type, htab->params->vle_reloc_fixup);
9137 goto copy_reloc;
9138
9139 case R_PPC_VLE_HI16A:
9140 relocation = (relocation + addend) >> 16;
9141 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9142 contents + rel->r_offset, relocation,
9143 split16a_type, htab->params->vle_reloc_fixup);
9144 goto copy_reloc;
9145
9146 case R_PPC_VLE_HI16D:
9147 relocation = (relocation + addend) >> 16;
9148 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9149 contents + rel->r_offset, relocation,
9150 split16d_type, htab->params->vle_reloc_fixup);
9151 goto copy_reloc;
9152
9153 case R_PPC_VLE_HA16A:
9154 relocation = (relocation + addend + 0x8000) >> 16;
9155 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9156 contents + rel->r_offset, relocation,
9157 split16a_type, htab->params->vle_reloc_fixup);
9158 goto copy_reloc;
9159
9160 case R_PPC_VLE_HA16D:
9161 relocation = (relocation + addend + 0x8000) >> 16;
9162 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9163 contents + rel->r_offset, relocation,
9164 split16d_type, htab->params->vle_reloc_fixup);
9165 goto copy_reloc;
9166
9167 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9168 case R_PPC_EMB_SDA21:
9169 case R_PPC_VLE_SDA21:
9170 case R_PPC_EMB_RELSDA:
9171 case R_PPC_VLE_SDA21_LO:
9172 {
9173 const char *name;
9174 int reg;
9175 unsigned int insn;
9176 struct elf_link_hash_entry *sda = NULL;
9177
9178 if (sec == NULL || sec->output_section == NULL)
9179 {
9180 unresolved_reloc = TRUE;
9181 break;
9182 }
9183
9184 name = bfd_get_section_name (output_bfd, sec->output_section);
9185 if (strcmp (name, ".sdata") == 0
9186 || strcmp (name, ".sbss") == 0)
9187 {
9188 reg = 13;
9189 sda = htab->sdata[0].sym;
9190 }
9191 else if (strcmp (name, ".sdata2") == 0
9192 || strcmp (name, ".sbss2") == 0)
9193 {
9194 reg = 2;
9195 sda = htab->sdata[1].sym;
9196 }
9197 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9198 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9199 {
9200 reg = 0;
9201 }
9202 else
9203 {
9204 info->callbacks->einfo
9205 /* xgettext:c-format */
9206 (_("%P: %B: the target (%s) of a %s relocation is "
9207 "in the wrong output section (%s)\n"),
9208 input_bfd,
9209 sym_name,
9210 howto->name,
9211 name);
9212
9213 bfd_set_error (bfd_error_bad_value);
9214 ret = FALSE;
9215 goto copy_reloc;
9216 }
9217
9218 if (sda != NULL)
9219 {
9220 if (!is_static_defined (sda))
9221 {
9222 unresolved_reloc = TRUE;
9223 break;
9224 }
9225 addend -= SYM_VAL (sda);
9226 }
9227
9228 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9229 if (reg == 0
9230 && (r_type == R_PPC_VLE_SDA21
9231 || r_type == R_PPC_VLE_SDA21_LO))
9232 {
9233 relocation = relocation + addend;
9234 addend = 0;
9235
9236 /* Force e_li insn, keeping RT from original insn. */
9237 insn &= 0x1f << 21;
9238 insn |= 28u << 26;
9239
9240 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9241 /* Top 4 bits of value to 17..20. */
9242 insn |= (relocation & 0xf0000) >> 5;
9243 /* Next 5 bits of the value to 11..15. */
9244 insn |= (relocation & 0xf800) << 5;
9245 /* And the final 11 bits of the value to bits 21 to 31. */
9246 insn |= relocation & 0x7ff;
9247
9248 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9249
9250 if (r_type == R_PPC_VLE_SDA21
9251 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9252 goto overflow;
9253 goto copy_reloc;
9254 }
9255 else if (r_type == R_PPC_EMB_SDA21
9256 || r_type == R_PPC_VLE_SDA21
9257 || r_type == R_PPC_VLE_SDA21_LO)
9258 {
9259 /* Fill in register field. */
9260 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9261 }
9262 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9263 }
9264 break;
9265
9266 case R_PPC_VLE_SDAREL_LO16A:
9267 case R_PPC_VLE_SDAREL_LO16D:
9268 case R_PPC_VLE_SDAREL_HI16A:
9269 case R_PPC_VLE_SDAREL_HI16D:
9270 case R_PPC_VLE_SDAREL_HA16A:
9271 case R_PPC_VLE_SDAREL_HA16D:
9272 {
9273 bfd_vma value;
9274 const char *name;
9275 struct elf_link_hash_entry *sda = NULL;
9276
9277 if (sec == NULL || sec->output_section == NULL)
9278 {
9279 unresolved_reloc = TRUE;
9280 break;
9281 }
9282
9283 name = bfd_get_section_name (output_bfd, sec->output_section);
9284 if (strcmp (name, ".sdata") == 0
9285 || strcmp (name, ".sbss") == 0)
9286 sda = htab->sdata[0].sym;
9287 else if (strcmp (name, ".sdata2") == 0
9288 || strcmp (name, ".sbss2") == 0)
9289 sda = htab->sdata[1].sym;
9290 else
9291 {
9292 _bfd_error_handler
9293 /* xgettext:c-format */
9294 (_("%B: the target (%s) of a %s relocation is "
9295 "in the wrong output section (%s)"),
9296 input_bfd,
9297 sym_name,
9298 howto->name,
9299 name);
9300
9301 bfd_set_error (bfd_error_bad_value);
9302 ret = FALSE;
9303 goto copy_reloc;
9304 }
9305
9306 if (sda == NULL || !is_static_defined (sda))
9307 {
9308 unresolved_reloc = TRUE;
9309 break;
9310 }
9311 value = relocation + addend - SYM_VAL (sda);
9312
9313 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9314 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9315 contents + rel->r_offset, value,
9316 split16a_type,
9317 htab->params->vle_reloc_fixup);
9318 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9319 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9320 contents + rel->r_offset, value,
9321 split16d_type,
9322 htab->params->vle_reloc_fixup);
9323 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9324 {
9325 value = value >> 16;
9326 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9327 contents + rel->r_offset, value,
9328 split16a_type,
9329 htab->params->vle_reloc_fixup);
9330 }
9331 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9332 {
9333 value = value >> 16;
9334 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9335 contents + rel->r_offset, value,
9336 split16d_type,
9337 htab->params->vle_reloc_fixup);
9338 }
9339 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9340 {
9341 value = (value + 0x8000) >> 16;
9342 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9343 contents + rel->r_offset, value,
9344 split16a_type,
9345 htab->params->vle_reloc_fixup);
9346 }
9347 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9348 {
9349 value = (value + 0x8000) >> 16;
9350 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9351 contents + rel->r_offset, value,
9352 split16d_type,
9353 htab->params->vle_reloc_fixup);
9354 }
9355 }
9356 goto copy_reloc;
9357
9358 case R_PPC_VLE_ADDR20:
9359 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9360 continue;
9361
9362 /* Relocate against the beginning of the section. */
9363 case R_PPC_SECTOFF:
9364 case R_PPC_SECTOFF_LO:
9365 case R_PPC_SECTOFF_HI:
9366 case R_PPC_SECTOFF_HA:
9367 if (sec == NULL || sec->output_section == NULL)
9368 {
9369 unresolved_reloc = TRUE;
9370 break;
9371 }
9372 addend -= sec->output_section->vma;
9373 break;
9374
9375 /* Negative relocations. */
9376 case R_PPC_EMB_NADDR32:
9377 case R_PPC_EMB_NADDR16:
9378 case R_PPC_EMB_NADDR16_LO:
9379 case R_PPC_EMB_NADDR16_HI:
9380 case R_PPC_EMB_NADDR16_HA:
9381 addend -= 2 * relocation;
9382 break;
9383
9384 case R_PPC_COPY:
9385 case R_PPC_GLOB_DAT:
9386 case R_PPC_JMP_SLOT:
9387 case R_PPC_RELATIVE:
9388 case R_PPC_IRELATIVE:
9389 case R_PPC_PLT32:
9390 case R_PPC_PLTREL32:
9391 case R_PPC_PLT16_LO:
9392 case R_PPC_PLT16_HI:
9393 case R_PPC_PLT16_HA:
9394 case R_PPC_ADDR30:
9395 case R_PPC_EMB_RELSEC16:
9396 case R_PPC_EMB_RELST_LO:
9397 case R_PPC_EMB_RELST_HI:
9398 case R_PPC_EMB_RELST_HA:
9399 case R_PPC_EMB_BIT_FLD:
9400 info->callbacks->einfo
9401 /* xgettext:c-format */
9402 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9403 input_bfd,
9404 howto->name,
9405 sym_name);
9406
9407 bfd_set_error (bfd_error_invalid_operation);
9408 ret = FALSE;
9409 goto copy_reloc;
9410 }
9411
9412 /* Do any further special processing. */
9413 switch (r_type)
9414 {
9415 default:
9416 break;
9417
9418 case R_PPC_ADDR16_HA:
9419 case R_PPC_REL16_HA:
9420 case R_PPC_REL16DX_HA:
9421 case R_PPC_SECTOFF_HA:
9422 case R_PPC_TPREL16_HA:
9423 case R_PPC_DTPREL16_HA:
9424 case R_PPC_EMB_NADDR16_HA:
9425 case R_PPC_EMB_RELST_HA:
9426 /* It's just possible that this symbol is a weak symbol
9427 that's not actually defined anywhere. In that case,
9428 'sec' would be NULL, and we should leave the symbol
9429 alone (it will be set to zero elsewhere in the link). */
9430 if (sec == NULL)
9431 break;
9432 /* Fall through. */
9433
9434 case R_PPC_PLT16_HA:
9435 case R_PPC_GOT16_HA:
9436 case R_PPC_GOT_TLSGD16_HA:
9437 case R_PPC_GOT_TLSLD16_HA:
9438 case R_PPC_GOT_TPREL16_HA:
9439 case R_PPC_GOT_DTPREL16_HA:
9440 /* Add 0x10000 if sign bit in 0:15 is set.
9441 Bits 0:15 are not used. */
9442 addend += 0x8000;
9443 break;
9444
9445 case R_PPC_ADDR16:
9446 case R_PPC_ADDR16_LO:
9447 case R_PPC_GOT16:
9448 case R_PPC_GOT16_LO:
9449 case R_PPC_SDAREL16:
9450 case R_PPC_SECTOFF:
9451 case R_PPC_SECTOFF_LO:
9452 case R_PPC_DTPREL16:
9453 case R_PPC_DTPREL16_LO:
9454 case R_PPC_TPREL16:
9455 case R_PPC_TPREL16_LO:
9456 case R_PPC_GOT_TLSGD16:
9457 case R_PPC_GOT_TLSGD16_LO:
9458 case R_PPC_GOT_TLSLD16:
9459 case R_PPC_GOT_TLSLD16_LO:
9460 case R_PPC_GOT_DTPREL16:
9461 case R_PPC_GOT_DTPREL16_LO:
9462 case R_PPC_GOT_TPREL16:
9463 case R_PPC_GOT_TPREL16_LO:
9464 {
9465 /* The 32-bit ABI lacks proper relocations to deal with
9466 certain 64-bit instructions. Prevent damage to bits
9467 that make up part of the insn opcode. */
9468 unsigned int insn, mask, lobit;
9469
9470 insn = bfd_get_32 (input_bfd,
9471 contents + rel->r_offset - d_offset);
9472 mask = 0;
9473 if (is_insn_ds_form (insn))
9474 mask = 3;
9475 else if (is_insn_dq_form (insn))
9476 mask = 15;
9477 else
9478 break;
9479 relocation += addend;
9480 addend = insn & mask;
9481 lobit = mask & relocation;
9482 if (lobit != 0)
9483 {
9484 relocation ^= lobit;
9485 info->callbacks->einfo
9486 /* xgettext:c-format */
9487 (_("%H: error: %s against `%s' not a multiple of %u\n"),
9488 input_bfd, input_section, rel->r_offset,
9489 howto->name, sym_name, mask + 1);
9490 bfd_set_error (bfd_error_bad_value);
9491 ret = FALSE;
9492 }
9493 }
9494 break;
9495 }
9496
9497 #ifdef DEBUG
9498 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9499 "offset = %ld, addend = %ld\n",
9500 howto->name,
9501 (int) r_type,
9502 sym_name,
9503 r_symndx,
9504 (long) rel->r_offset,
9505 (long) addend);
9506 #endif
9507
9508 if (unresolved_reloc
9509 && !((input_section->flags & SEC_DEBUGGING) != 0
9510 && h->def_dynamic)
9511 && _bfd_elf_section_offset (output_bfd, info, input_section,
9512 rel->r_offset) != (bfd_vma) -1)
9513 {
9514 info->callbacks->einfo
9515 /* xgettext:c-format */
9516 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
9517 input_bfd, input_section, rel->r_offset,
9518 howto->name,
9519 sym_name);
9520 ret = FALSE;
9521 }
9522
9523 /* 16-bit fields in insns mostly have signed values, but a
9524 few insns have 16-bit unsigned values. Really, we should
9525 have different reloc types. */
9526 if (howto->complain_on_overflow != complain_overflow_dont
9527 && howto->dst_mask == 0xffff
9528 && (input_section->flags & SEC_CODE) != 0)
9529 {
9530 enum complain_overflow complain = complain_overflow_signed;
9531
9532 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9533 {
9534 unsigned int insn;
9535
9536 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9537 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9538 complain = complain_overflow_bitfield;
9539 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9540 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9541 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9542 complain = complain_overflow_unsigned;
9543 }
9544 if (howto->complain_on_overflow != complain)
9545 {
9546 alt_howto = *howto;
9547 alt_howto.complain_on_overflow = complain;
9548 howto = &alt_howto;
9549 }
9550 }
9551
9552 if (r_type == R_PPC_REL16DX_HA)
9553 {
9554 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9555 if (rel->r_offset + 4 > input_section->size)
9556 r = bfd_reloc_outofrange;
9557 else
9558 {
9559 unsigned int insn;
9560
9561 relocation += addend;
9562 relocation -= (rel->r_offset
9563 + input_section->output_offset
9564 + input_section->output_section->vma);
9565 relocation >>= 16;
9566 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9567 insn &= ~0x1fffc1;
9568 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9569 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9570 r = bfd_reloc_ok;
9571 }
9572 }
9573 else
9574 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9575 rel->r_offset, relocation, addend);
9576
9577 if (r != bfd_reloc_ok)
9578 {
9579 if (r == bfd_reloc_overflow)
9580 {
9581 overflow:
9582 /* On code like "if (foo) foo();" don't report overflow
9583 on a branch to zero when foo is undefined. */
9584 if (!warned
9585 && !(h != NULL
9586 && (h->root.type == bfd_link_hash_undefweak
9587 || h->root.type == bfd_link_hash_undefined)
9588 && is_branch_reloc (r_type)))
9589 info->callbacks->reloc_overflow
9590 (info, (h ? &h->root : NULL), sym_name, howto->name,
9591 rel->r_addend, input_bfd, input_section, rel->r_offset);
9592 }
9593 else
9594 {
9595 info->callbacks->einfo
9596 /* xgettext:c-format */
9597 (_("%H: %s reloc against `%s': error %d\n"),
9598 input_bfd, input_section, rel->r_offset,
9599 howto->name, sym_name, (int) r);
9600 ret = FALSE;
9601 }
9602 }
9603 copy_reloc:
9604 if (wrel != rel)
9605 *wrel = *rel;
9606 }
9607
9608 if (wrel != rel)
9609 {
9610 Elf_Internal_Shdr *rel_hdr;
9611 size_t deleted = rel - wrel;
9612
9613 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9614 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9615 if (rel_hdr->sh_size == 0)
9616 {
9617 /* It is too late to remove an empty reloc section. Leave
9618 one NONE reloc.
9619 ??? What is wrong with an empty section??? */
9620 rel_hdr->sh_size = rel_hdr->sh_entsize;
9621 deleted -= 1;
9622 wrel++;
9623 }
9624 relend = wrel;
9625 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9626 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9627 input_section->reloc_count -= deleted;
9628 }
9629
9630 #ifdef DEBUG
9631 fprintf (stderr, "\n");
9632 #endif
9633
9634 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9635 && input_section->size != input_section->rawsize
9636 && (strcmp (input_section->output_section->name, ".init") == 0
9637 || strcmp (input_section->output_section->name, ".fini") == 0))
9638 {
9639 /* Branch around the trampolines. */
9640 unsigned int insn = B + input_section->size - input_section->rawsize;
9641 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9642 }
9643
9644 if (htab->params->ppc476_workaround
9645 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9646 && (!bfd_link_relocatable (info)
9647 || (input_section->output_section->alignment_power
9648 >= htab->params->pagesize_p2)))
9649 {
9650 bfd_vma start_addr, end_addr, addr;
9651 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9652
9653 if (relax_info->workaround_size != 0)
9654 {
9655 bfd_byte *p;
9656 unsigned int n;
9657 bfd_byte fill[4];
9658
9659 bfd_put_32 (input_bfd, BA, fill);
9660 p = contents + input_section->size - relax_info->workaround_size;
9661 n = relax_info->workaround_size >> 2;
9662 while (n--)
9663 {
9664 memcpy (p, fill, 4);
9665 p += 4;
9666 }
9667 }
9668
9669 /* The idea is: Replace the last instruction on a page with a
9670 branch to a patch area. Put the insn there followed by a
9671 branch back to the next page. Complicated a little by
9672 needing to handle moved conditional branches, and by not
9673 wanting to touch data-in-text. */
9674
9675 start_addr = (input_section->output_section->vma
9676 + input_section->output_offset);
9677 end_addr = (start_addr + input_section->size
9678 - relax_info->workaround_size);
9679 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9680 addr < end_addr;
9681 addr += pagesize)
9682 {
9683 bfd_vma offset = addr - start_addr;
9684 Elf_Internal_Rela *lo, *hi;
9685 bfd_boolean is_data;
9686 bfd_vma patch_off, patch_addr;
9687 unsigned int insn;
9688
9689 /* Do we have a data reloc at this offset? If so, leave
9690 the word alone. */
9691 is_data = FALSE;
9692 lo = relocs;
9693 hi = relend;
9694 rel = NULL;
9695 while (lo < hi)
9696 {
9697 rel = lo + (hi - lo) / 2;
9698 if (rel->r_offset < offset)
9699 lo = rel + 1;
9700 else if (rel->r_offset > offset + 3)
9701 hi = rel;
9702 else
9703 {
9704 switch (ELF32_R_TYPE (rel->r_info))
9705 {
9706 case R_PPC_ADDR32:
9707 case R_PPC_UADDR32:
9708 case R_PPC_REL32:
9709 case R_PPC_ADDR30:
9710 is_data = TRUE;
9711 break;
9712 default:
9713 break;
9714 }
9715 break;
9716 }
9717 }
9718 if (is_data)
9719 continue;
9720
9721 /* Some instructions can be left alone too. Unconditional
9722 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9723 avoid the icache failure.
9724
9725 The problem occurs due to prefetch across a page boundary
9726 where stale instructions can be fetched from the next
9727 page, and the mechanism for flushing these bad
9728 instructions fails under certain circumstances. The
9729 unconditional branches:
9730 1) Branch: b, bl, ba, bla,
9731 2) Branch Conditional: bc, bca, bcl, bcla,
9732 3) Branch Conditional to Link Register: bclr, bclrl,
9733 where (2) and (3) have BO=0x14 making them unconditional,
9734 prevent the bad prefetch because the prefetch itself is
9735 affected by these instructions. This happens even if the
9736 instruction is not executed.
9737
9738 A bctr example:
9739 .
9740 . lis 9,new_page@ha
9741 . addi 9,9,new_page@l
9742 . mtctr 9
9743 . bctr
9744 . nop
9745 . nop
9746 . new_page:
9747 .
9748 The bctr is not predicted taken due to ctr not being
9749 ready, so prefetch continues on past the bctr into the
9750 new page which might have stale instructions. If they
9751 fail to be flushed, then they will be executed after the
9752 bctr executes. Either of the following modifications
9753 prevent the bad prefetch from happening in the first
9754 place:
9755 .
9756 . lis 9,new_page@ha lis 9,new_page@ha
9757 . addi 9,9,new_page@l addi 9,9,new_page@l
9758 . mtctr 9 mtctr 9
9759 . bctr bctr
9760 . nop b somewhere_else
9761 . b somewhere_else nop
9762 . new_page: new_page:
9763 . */
9764 insn = bfd_get_32 (input_bfd, contents + offset);
9765 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9766 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9767 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9768 || ((insn & (0x3f << 26)) == (19u << 26)
9769 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9770 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9771 continue;
9772
9773 patch_addr = (start_addr + input_section->size
9774 - relax_info->workaround_size);
9775 patch_addr = (patch_addr + 15) & -16;
9776 patch_off = patch_addr - start_addr;
9777 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9778
9779 if (rel != NULL
9780 && rel->r_offset >= offset
9781 && rel->r_offset < offset + 4)
9782 {
9783 asection *sreloc;
9784
9785 /* If the insn we are patching had a reloc, adjust the
9786 reloc r_offset so that the reloc applies to the moved
9787 location. This matters for -r and --emit-relocs. */
9788 if (rel + 1 != relend)
9789 {
9790 Elf_Internal_Rela tmp = *rel;
9791
9792 /* Keep the relocs sorted by r_offset. */
9793 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9794 relend[-1] = tmp;
9795 }
9796 relend[-1].r_offset += patch_off - offset;
9797
9798 /* Adjust REL16 addends too. */
9799 switch (ELF32_R_TYPE (relend[-1].r_info))
9800 {
9801 case R_PPC_REL16:
9802 case R_PPC_REL16_LO:
9803 case R_PPC_REL16_HI:
9804 case R_PPC_REL16_HA:
9805 relend[-1].r_addend += patch_off - offset;
9806 break;
9807 default:
9808 break;
9809 }
9810
9811 /* If we are building a PIE or shared library with
9812 non-PIC objects, perhaps we had a dynamic reloc too?
9813 If so, the dynamic reloc must move with the insn. */
9814 sreloc = elf_section_data (input_section)->sreloc;
9815 if (sreloc != NULL)
9816 {
9817 Elf32_External_Rela *slo, *shi, *srelend;
9818 bfd_vma soffset;
9819
9820 slo = (Elf32_External_Rela *) sreloc->contents;
9821 shi = srelend = slo + sreloc->reloc_count;
9822 soffset = (offset + input_section->output_section->vma
9823 + input_section->output_offset);
9824 while (slo < shi)
9825 {
9826 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9827 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9828 &outrel);
9829 if (outrel.r_offset < soffset)
9830 slo = srel + 1;
9831 else if (outrel.r_offset > soffset + 3)
9832 shi = srel;
9833 else
9834 {
9835 if (srel + 1 != srelend)
9836 {
9837 memmove (srel, srel + 1,
9838 (srelend - (srel + 1)) * sizeof (*srel));
9839 srel = srelend - 1;
9840 }
9841 outrel.r_offset += patch_off - offset;
9842 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9843 (bfd_byte *) srel);
9844 break;
9845 }
9846 }
9847 }
9848 }
9849 else
9850 rel = NULL;
9851
9852 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9853 && (insn & 2) == 0 /* relative */)
9854 {
9855 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9856
9857 delta += offset - patch_off;
9858 if (bfd_link_relocatable (info) && rel != NULL)
9859 delta = 0;
9860 if (!bfd_link_relocatable (info) && rel != NULL)
9861 {
9862 enum elf_ppc_reloc_type r_type;
9863
9864 r_type = ELF32_R_TYPE (relend[-1].r_info);
9865 if (r_type == R_PPC_REL14_BRTAKEN)
9866 insn |= BRANCH_PREDICT_BIT;
9867 else if (r_type == R_PPC_REL14_BRNTAKEN)
9868 insn &= ~BRANCH_PREDICT_BIT;
9869 else
9870 BFD_ASSERT (r_type == R_PPC_REL14);
9871
9872 if ((r_type == R_PPC_REL14_BRTAKEN
9873 || r_type == R_PPC_REL14_BRNTAKEN)
9874 && delta + 0x8000 < 0x10000
9875 && (bfd_signed_vma) delta < 0)
9876 insn ^= BRANCH_PREDICT_BIT;
9877 }
9878 if (delta + 0x8000 < 0x10000)
9879 {
9880 bfd_put_32 (input_bfd,
9881 (insn & ~0xfffc) | (delta & 0xfffc),
9882 contents + patch_off);
9883 patch_off += 4;
9884 bfd_put_32 (input_bfd,
9885 B | ((offset + 4 - patch_off) & 0x3fffffc),
9886 contents + patch_off);
9887 patch_off += 4;
9888 }
9889 else
9890 {
9891 if (rel != NULL)
9892 {
9893 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9894
9895 relend[-1].r_offset += 8;
9896 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9897 }
9898 bfd_put_32 (input_bfd,
9899 (insn & ~0xfffc) | 8,
9900 contents + patch_off);
9901 patch_off += 4;
9902 bfd_put_32 (input_bfd,
9903 B | ((offset + 4 - patch_off) & 0x3fffffc),
9904 contents + patch_off);
9905 patch_off += 4;
9906 bfd_put_32 (input_bfd,
9907 B | ((delta - 8) & 0x3fffffc),
9908 contents + patch_off);
9909 patch_off += 4;
9910 }
9911 }
9912 else
9913 {
9914 bfd_put_32 (input_bfd, insn, contents + patch_off);
9915 patch_off += 4;
9916 bfd_put_32 (input_bfd,
9917 B | ((offset + 4 - patch_off) & 0x3fffffc),
9918 contents + patch_off);
9919 patch_off += 4;
9920 }
9921 BFD_ASSERT (patch_off <= input_section->size);
9922 relax_info->workaround_size = input_section->size - patch_off;
9923 }
9924 }
9925
9926 return ret;
9927 }
9928 \f
9929 /* Finish up dynamic symbol handling. We set the contents of various
9930 dynamic sections here. */
9931
9932 static bfd_boolean
9933 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9934 struct bfd_link_info *info,
9935 struct elf_link_hash_entry *h,
9936 Elf_Internal_Sym *sym)
9937 {
9938 struct ppc_elf_link_hash_table *htab;
9939 struct plt_entry *ent;
9940 bfd_boolean doneone;
9941
9942 #ifdef DEBUG
9943 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9944 h->root.root.string);
9945 #endif
9946
9947 htab = ppc_elf_hash_table (info);
9948 BFD_ASSERT (htab->elf.dynobj != NULL);
9949
9950 doneone = FALSE;
9951 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9952 if (ent->plt.offset != (bfd_vma) -1)
9953 {
9954 if (!doneone)
9955 {
9956 Elf_Internal_Rela rela;
9957 bfd_byte *loc;
9958 bfd_vma reloc_index;
9959
9960 if (htab->plt_type == PLT_NEW
9961 || !htab->elf.dynamic_sections_created
9962 || h->dynindx == -1)
9963 reloc_index = ent->plt.offset / 4;
9964 else
9965 {
9966 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9967 / htab->plt_slot_size);
9968 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9969 && htab->plt_type == PLT_OLD)
9970 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9971 }
9972
9973 /* This symbol has an entry in the procedure linkage table.
9974 Set it up. */
9975 if (htab->plt_type == PLT_VXWORKS
9976 && htab->elf.dynamic_sections_created
9977 && h->dynindx != -1)
9978 {
9979 bfd_vma got_offset;
9980 const bfd_vma *plt_entry;
9981
9982 /* The first three entries in .got.plt are reserved. */
9983 got_offset = (reloc_index + 3) * 4;
9984
9985 /* Use the right PLT. */
9986 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
9987 : ppc_elf_vxworks_plt_entry;
9988
9989 /* Fill in the .plt on VxWorks. */
9990 if (bfd_link_pic (info))
9991 {
9992 bfd_put_32 (output_bfd,
9993 plt_entry[0] | PPC_HA (got_offset),
9994 htab->elf.splt->contents + ent->plt.offset + 0);
9995 bfd_put_32 (output_bfd,
9996 plt_entry[1] | PPC_LO (got_offset),
9997 htab->elf.splt->contents + ent->plt.offset + 4);
9998 }
9999 else
10000 {
10001 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10002
10003 bfd_put_32 (output_bfd,
10004 plt_entry[0] | PPC_HA (got_loc),
10005 htab->elf.splt->contents + ent->plt.offset + 0);
10006 bfd_put_32 (output_bfd,
10007 plt_entry[1] | PPC_LO (got_loc),
10008 htab->elf.splt->contents + ent->plt.offset + 4);
10009 }
10010
10011 bfd_put_32 (output_bfd, plt_entry[2],
10012 htab->elf.splt->contents + ent->plt.offset + 8);
10013 bfd_put_32 (output_bfd, plt_entry[3],
10014 htab->elf.splt->contents + ent->plt.offset + 12);
10015
10016 /* This instruction is an immediate load. The value loaded is
10017 the byte offset of the R_PPC_JMP_SLOT relocation from the
10018 start of the .rela.plt section. The value is stored in the
10019 low-order 16 bits of the load instruction. */
10020 /* NOTE: It appears that this is now an index rather than a
10021 prescaled offset. */
10022 bfd_put_32 (output_bfd,
10023 plt_entry[4] | reloc_index,
10024 htab->elf.splt->contents + ent->plt.offset + 16);
10025 /* This instruction is a PC-relative branch whose target is
10026 the start of the PLT section. The address of this branch
10027 instruction is 20 bytes beyond the start of this PLT entry.
10028 The address is encoded in bits 6-29, inclusive. The value
10029 stored is right-shifted by two bits, permitting a 26-bit
10030 offset. */
10031 bfd_put_32 (output_bfd,
10032 (plt_entry[5]
10033 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10034 htab->elf.splt->contents + ent->plt.offset + 20);
10035 bfd_put_32 (output_bfd, plt_entry[6],
10036 htab->elf.splt->contents + ent->plt.offset + 24);
10037 bfd_put_32 (output_bfd, plt_entry[7],
10038 htab->elf.splt->contents + ent->plt.offset + 28);
10039
10040 /* Fill in the GOT entry corresponding to this PLT slot with
10041 the address immediately after the "bctr" instruction
10042 in this PLT entry. */
10043 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10044 + htab->elf.splt->output_offset
10045 + ent->plt.offset + 16),
10046 htab->elf.sgotplt->contents + got_offset);
10047
10048 if (!bfd_link_pic (info))
10049 {
10050 /* Fill in a couple of entries in .rela.plt.unloaded. */
10051 loc = htab->srelplt2->contents
10052 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10053 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10054 * sizeof (Elf32_External_Rela));
10055
10056 /* Provide the @ha relocation for the first instruction. */
10057 rela.r_offset = (htab->elf.splt->output_section->vma
10058 + htab->elf.splt->output_offset
10059 + ent->plt.offset + 2);
10060 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10061 R_PPC_ADDR16_HA);
10062 rela.r_addend = got_offset;
10063 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10064 loc += sizeof (Elf32_External_Rela);
10065
10066 /* Provide the @l relocation for the second instruction. */
10067 rela.r_offset = (htab->elf.splt->output_section->vma
10068 + htab->elf.splt->output_offset
10069 + ent->plt.offset + 6);
10070 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10071 R_PPC_ADDR16_LO);
10072 rela.r_addend = got_offset;
10073 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10074 loc += sizeof (Elf32_External_Rela);
10075
10076 /* Provide a relocation for the GOT entry corresponding to this
10077 PLT slot. Point it at the middle of the .plt entry. */
10078 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10079 + htab->elf.sgotplt->output_offset
10080 + got_offset);
10081 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10082 R_PPC_ADDR32);
10083 rela.r_addend = ent->plt.offset + 16;
10084 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10085 }
10086
10087 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10088 In particular, the offset for the relocation is not the
10089 address of the PLT entry for this function, as specified
10090 by the ABI. Instead, the offset is set to the address of
10091 the GOT slot for this function. See EABI 4.4.4.1. */
10092 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10093 + htab->elf.sgotplt->output_offset
10094 + got_offset);
10095
10096 }
10097 else
10098 {
10099 asection *splt = htab->elf.splt;
10100 if (!htab->elf.dynamic_sections_created
10101 || h->dynindx == -1)
10102 splt = htab->elf.iplt;
10103
10104 rela.r_offset = (splt->output_section->vma
10105 + splt->output_offset
10106 + ent->plt.offset);
10107 if (htab->plt_type == PLT_OLD
10108 || !htab->elf.dynamic_sections_created
10109 || h->dynindx == -1)
10110 {
10111 /* We don't need to fill in the .plt. The ppc dynamic
10112 linker will fill it in. */
10113 }
10114 else
10115 {
10116 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10117 + htab->glink->output_section->vma
10118 + htab->glink->output_offset);
10119 bfd_put_32 (output_bfd, val,
10120 splt->contents + ent->plt.offset);
10121 }
10122 }
10123
10124 /* Fill in the entry in the .rela.plt section. */
10125 rela.r_addend = 0;
10126 if (!htab->elf.dynamic_sections_created
10127 || h->dynindx == -1)
10128 {
10129 BFD_ASSERT (h->type == STT_GNU_IFUNC
10130 && h->def_regular
10131 && (h->root.type == bfd_link_hash_defined
10132 || h->root.type == bfd_link_hash_defweak));
10133 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10134 rela.r_addend = SYM_VAL (h);
10135 }
10136 else
10137 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10138
10139 if (!htab->elf.dynamic_sections_created
10140 || h->dynindx == -1)
10141 {
10142 loc = (htab->elf.irelplt->contents
10143 + (htab->elf.irelplt->reloc_count++
10144 * sizeof (Elf32_External_Rela)));
10145 htab->local_ifunc_resolver = 1;
10146 }
10147 else
10148 {
10149 loc = (htab->elf.srelplt->contents
10150 + reloc_index * sizeof (Elf32_External_Rela));
10151 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10152 htab->maybe_local_ifunc_resolver = 1;
10153 }
10154 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10155
10156 if (!h->def_regular)
10157 {
10158 /* Mark the symbol as undefined, rather than as
10159 defined in the .plt section. Leave the value if
10160 there were any relocations where pointer equality
10161 matters (this is a clue for the dynamic linker, to
10162 make function pointer comparisons work between an
10163 application and shared library), otherwise set it
10164 to zero. */
10165 sym->st_shndx = SHN_UNDEF;
10166 if (!h->pointer_equality_needed)
10167 sym->st_value = 0;
10168 else if (!h->ref_regular_nonweak)
10169 {
10170 /* This breaks function pointer comparisons, but
10171 that is better than breaking tests for a NULL
10172 function pointer. */
10173 sym->st_value = 0;
10174 }
10175 }
10176 else if (h->type == STT_GNU_IFUNC
10177 && !bfd_link_pic (info))
10178 {
10179 /* Set the value of ifunc symbols in a non-pie
10180 executable to the glink entry. This is to avoid
10181 text relocations. We can't do this for ifunc in
10182 allocate_dynrelocs, as we do for normal dynamic
10183 function symbols with plt entries, because we need
10184 to keep the original value around for the ifunc
10185 relocation. */
10186 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10187 (output_bfd, htab->glink->output_section));
10188 sym->st_value = (ent->glink_offset
10189 + htab->glink->output_offset
10190 + htab->glink->output_section->vma);
10191 }
10192 doneone = TRUE;
10193 }
10194
10195 if (htab->plt_type == PLT_NEW
10196 || !htab->elf.dynamic_sections_created
10197 || h->dynindx == -1)
10198 {
10199 unsigned char *p;
10200 asection *splt = htab->elf.splt;
10201 if (!htab->elf.dynamic_sections_created
10202 || h->dynindx == -1)
10203 splt = htab->elf.iplt;
10204
10205 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10206
10207 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10208 {
10209 bfd_put_32 (output_bfd, LWZ_11_3, p);
10210 p += 4;
10211 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10212 p += 4;
10213 bfd_put_32 (output_bfd, MR_0_3, p);
10214 p += 4;
10215 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10216 p += 4;
10217 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10218 p += 4;
10219 bfd_put_32 (output_bfd, BEQLR, p);
10220 p += 4;
10221 bfd_put_32 (output_bfd, MR_3_0, p);
10222 p += 4;
10223 bfd_put_32 (output_bfd, NOP, p);
10224 p += 4;
10225 }
10226
10227 write_glink_stub (ent, splt, p, info);
10228
10229 if (!bfd_link_pic (info))
10230 /* We only need one non-PIC glink stub. */
10231 break;
10232 }
10233 else
10234 break;
10235 }
10236
10237 if (h->needs_copy)
10238 {
10239 asection *s;
10240 Elf_Internal_Rela rela;
10241 bfd_byte *loc;
10242
10243 /* This symbols needs a copy reloc. Set it up. */
10244
10245 #ifdef DEBUG
10246 fprintf (stderr, ", copy");
10247 #endif
10248
10249 BFD_ASSERT (h->dynindx != -1);
10250
10251 if (ppc_elf_hash_entry (h)->has_sda_refs)
10252 s = htab->relsbss;
10253 else if (h->root.u.def.section == htab->elf.sdynrelro)
10254 s = htab->elf.sreldynrelro;
10255 else
10256 s = htab->elf.srelbss;
10257 BFD_ASSERT (s != NULL);
10258
10259 rela.r_offset = SYM_VAL (h);
10260 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10261 rela.r_addend = 0;
10262 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10263 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10264 }
10265
10266 #ifdef DEBUG
10267 fprintf (stderr, "\n");
10268 #endif
10269
10270 return TRUE;
10271 }
10272 \f
10273 static enum elf_reloc_type_class
10274 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10275 const asection *rel_sec,
10276 const Elf_Internal_Rela *rela)
10277 {
10278 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10279
10280 if (rel_sec == htab->elf.irelplt)
10281 return reloc_class_ifunc;
10282
10283 switch (ELF32_R_TYPE (rela->r_info))
10284 {
10285 case R_PPC_RELATIVE:
10286 return reloc_class_relative;
10287 case R_PPC_JMP_SLOT:
10288 return reloc_class_plt;
10289 case R_PPC_COPY:
10290 return reloc_class_copy;
10291 default:
10292 return reloc_class_normal;
10293 }
10294 }
10295 \f
10296 /* Finish up the dynamic sections. */
10297
10298 static bfd_boolean
10299 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10300 struct bfd_link_info *info)
10301 {
10302 asection *sdyn;
10303 struct ppc_elf_link_hash_table *htab;
10304 bfd_vma got;
10305 bfd *dynobj;
10306 bfd_boolean ret = TRUE;
10307
10308 #ifdef DEBUG
10309 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10310 #endif
10311
10312 htab = ppc_elf_hash_table (info);
10313 dynobj = htab->elf.dynobj;
10314 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10315
10316 got = 0;
10317 if (htab->elf.hgot != NULL)
10318 got = SYM_VAL (htab->elf.hgot);
10319
10320 if (htab->elf.dynamic_sections_created)
10321 {
10322 Elf32_External_Dyn *dyncon, *dynconend;
10323
10324 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10325
10326 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10327 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10328 for (; dyncon < dynconend; dyncon++)
10329 {
10330 Elf_Internal_Dyn dyn;
10331 asection *s;
10332
10333 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10334
10335 switch (dyn.d_tag)
10336 {
10337 case DT_PLTGOT:
10338 if (htab->is_vxworks)
10339 s = htab->elf.sgotplt;
10340 else
10341 s = htab->elf.splt;
10342 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10343 break;
10344
10345 case DT_PLTRELSZ:
10346 dyn.d_un.d_val = htab->elf.srelplt->size;
10347 break;
10348
10349 case DT_JMPREL:
10350 s = htab->elf.srelplt;
10351 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10352 break;
10353
10354 case DT_PPC_GOT:
10355 dyn.d_un.d_ptr = got;
10356 break;
10357
10358 case DT_TEXTREL:
10359 if (htab->local_ifunc_resolver)
10360 info->callbacks->einfo
10361 (_("%X%P: text relocations and GNU indirect "
10362 "functions will result in a segfault at runtime\n"));
10363 else if (htab->maybe_local_ifunc_resolver)
10364 info->callbacks->einfo
10365 (_("%P: warning: text relocations and GNU indirect "
10366 "functions may result in a segfault at runtime\n"));
10367 continue;
10368
10369 default:
10370 if (htab->is_vxworks
10371 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10372 break;
10373 continue;
10374 }
10375
10376 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10377 }
10378 }
10379
10380 if (htab->elf.sgot != NULL
10381 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
10382 {
10383 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10384 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10385 {
10386 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10387
10388 p += htab->elf.hgot->root.u.def.value;
10389 if (htab->plt_type == PLT_OLD)
10390 {
10391 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10392 so that a function can easily find the address of
10393 _GLOBAL_OFFSET_TABLE_. */
10394 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10395 < htab->elf.hgot->root.u.def.section->size);
10396 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10397 }
10398
10399 if (sdyn != NULL)
10400 {
10401 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10402 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10403 < htab->elf.hgot->root.u.def.section->size);
10404 bfd_put_32 (output_bfd, val, p);
10405 }
10406 }
10407 else
10408 {
10409 /* xgettext:c-format */
10410 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10411 htab->elf.hgot->root.root.string,
10412 (htab->elf.sgotplt != NULL
10413 ? htab->elf.sgotplt->name
10414 : htab->elf.sgot->name));
10415 bfd_set_error (bfd_error_bad_value);
10416 ret = FALSE;
10417 }
10418
10419 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10420 }
10421
10422 /* Fill in the first entry in the VxWorks procedure linkage table. */
10423 if (htab->is_vxworks
10424 && htab->elf.splt != NULL
10425 && htab->elf.splt->size != 0
10426 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10427 {
10428 asection *splt = htab->elf.splt;
10429 /* Use the right PLT. */
10430 const bfd_vma *plt_entry = (bfd_link_pic (info)
10431 ? ppc_elf_vxworks_pic_plt0_entry
10432 : ppc_elf_vxworks_plt0_entry);
10433
10434 if (!bfd_link_pic (info))
10435 {
10436 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10437
10438 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10439 splt->contents + 0);
10440 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10441 splt->contents + 4);
10442 }
10443 else
10444 {
10445 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10446 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10447 }
10448 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10449 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10450 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10451 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10452 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10453 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10454
10455 if (! bfd_link_pic (info))
10456 {
10457 Elf_Internal_Rela rela;
10458 bfd_byte *loc;
10459
10460 loc = htab->srelplt2->contents;
10461
10462 /* Output the @ha relocation for the first instruction. */
10463 rela.r_offset = (htab->elf.splt->output_section->vma
10464 + htab->elf.splt->output_offset
10465 + 2);
10466 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10467 rela.r_addend = 0;
10468 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10469 loc += sizeof (Elf32_External_Rela);
10470
10471 /* Output the @l relocation for the second instruction. */
10472 rela.r_offset = (htab->elf.splt->output_section->vma
10473 + htab->elf.splt->output_offset
10474 + 6);
10475 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10476 rela.r_addend = 0;
10477 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10478 loc += sizeof (Elf32_External_Rela);
10479
10480 /* Fix up the remaining relocations. They may have the wrong
10481 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10482 in which symbols were output. */
10483 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10484 {
10485 Elf_Internal_Rela rel;
10486
10487 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10488 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10489 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10490 loc += sizeof (Elf32_External_Rela);
10491
10492 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10493 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10494 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10495 loc += sizeof (Elf32_External_Rela);
10496
10497 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10498 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10499 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10500 loc += sizeof (Elf32_External_Rela);
10501 }
10502 }
10503 }
10504
10505 if (htab->glink != NULL
10506 && htab->glink->contents != NULL
10507 && htab->elf.dynamic_sections_created)
10508 {
10509 unsigned char *p;
10510 unsigned char *endp;
10511 bfd_vma res0;
10512 unsigned int i;
10513
10514 /*
10515 * PIC glink code is the following:
10516 *
10517 * # ith PLT code stub.
10518 * addis 11,30,(plt+(i-1)*4-got)@ha
10519 * lwz 11,(plt+(i-1)*4-got)@l(11)
10520 * mtctr 11
10521 * bctr
10522 *
10523 * # A table of branches, one for each plt entry.
10524 * # The idea is that the plt call stub loads ctr and r11 with these
10525 * # addresses, so (r11 - res_0) gives the plt index * 4.
10526 * res_0: b PLTresolve
10527 * res_1: b PLTresolve
10528 * .
10529 * # Some number of entries towards the end can be nops
10530 * res_n_m3: nop
10531 * res_n_m2: nop
10532 * res_n_m1:
10533 *
10534 * PLTresolve:
10535 * addis 11,11,(1f-res_0)@ha
10536 * mflr 0
10537 * bcl 20,31,1f
10538 * 1: addi 11,11,(1b-res_0)@l
10539 * mflr 12
10540 * mtlr 0
10541 * sub 11,11,12 # r11 = index * 4
10542 * addis 12,12,(got+4-1b)@ha
10543 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10544 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10545 * mtctr 0
10546 * add 0,11,11
10547 * add 11,0,11 # r11 = index * 12 = reloc offset.
10548 * bctr
10549 */
10550 static const unsigned int pic_plt_resolve[] =
10551 {
10552 ADDIS_11_11,
10553 MFLR_0,
10554 BCL_20_31,
10555 ADDI_11_11,
10556 MFLR_12,
10557 MTLR_0,
10558 SUB_11_11_12,
10559 ADDIS_12_12,
10560 LWZ_0_12,
10561 LWZ_12_12,
10562 MTCTR_0,
10563 ADD_0_11_11,
10564 ADD_11_0_11,
10565 BCTR,
10566 NOP,
10567 NOP
10568 };
10569
10570 /*
10571 * Non-PIC glink code is a little simpler.
10572 *
10573 * # ith PLT code stub.
10574 * lis 11,(plt+(i-1)*4)@ha
10575 * lwz 11,(plt+(i-1)*4)@l(11)
10576 * mtctr 11
10577 * bctr
10578 *
10579 * The branch table is the same, then comes
10580 *
10581 * PLTresolve:
10582 * lis 12,(got+4)@ha
10583 * addis 11,11,(-res_0)@ha
10584 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10585 * addi 11,11,(-res_0)@l # r11 = index * 4
10586 * mtctr 0
10587 * add 0,11,11
10588 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10589 * add 11,0,11 # r11 = index * 12 = reloc offset.
10590 * bctr
10591 */
10592 static const unsigned int plt_resolve[] =
10593 {
10594 LIS_12,
10595 ADDIS_11_11,
10596 LWZ_0_12,
10597 ADDI_11_11,
10598 MTCTR_0,
10599 ADD_0_11_11,
10600 LWZ_12_12,
10601 ADD_11_0_11,
10602 BCTR,
10603 NOP,
10604 NOP,
10605 NOP,
10606 NOP,
10607 NOP,
10608 NOP,
10609 NOP
10610 };
10611
10612 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10613 abort ();
10614 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10615 abort ();
10616
10617 /* Build the branch table, one for each plt entry (less one),
10618 and perhaps some padding. */
10619 p = htab->glink->contents;
10620 p += htab->glink_pltresolve;
10621 endp = htab->glink->contents;
10622 endp += htab->glink->size - GLINK_PLTRESOLVE;
10623 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10624 {
10625 bfd_put_32 (output_bfd, B + endp - p, p);
10626 p += 4;
10627 }
10628 while (p < endp)
10629 {
10630 bfd_put_32 (output_bfd, NOP, p);
10631 p += 4;
10632 }
10633
10634 res0 = (htab->glink_pltresolve
10635 + htab->glink->output_section->vma
10636 + htab->glink->output_offset);
10637
10638 if (htab->params->ppc476_workaround)
10639 {
10640 /* Ensure that a call stub at the end of a page doesn't
10641 result in prefetch over the end of the page into the
10642 glink branch table. */
10643 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10644 bfd_vma page_addr;
10645 bfd_vma glink_start = (htab->glink->output_section->vma
10646 + htab->glink->output_offset);
10647
10648 for (page_addr = res0 & -pagesize;
10649 page_addr > glink_start;
10650 page_addr -= pagesize)
10651 {
10652 /* We have a plt call stub that may need fixing. */
10653 bfd_byte *loc;
10654 unsigned int insn;
10655
10656 loc = htab->glink->contents + page_addr - 4 - glink_start;
10657 insn = bfd_get_32 (output_bfd, loc);
10658 if (insn == BCTR)
10659 {
10660 /* By alignment, we know that there must be at least
10661 one other call stub before this one. */
10662 insn = bfd_get_32 (output_bfd, loc - 16);
10663 if (insn == BCTR)
10664 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10665 else
10666 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10667 }
10668 }
10669 }
10670
10671 /* Last comes the PLTresolve stub. */
10672 if (bfd_link_pic (info))
10673 {
10674 bfd_vma bcl;
10675
10676 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10677 {
10678 unsigned int insn = pic_plt_resolve[i];
10679
10680 if (htab->params->ppc476_workaround && insn == NOP)
10681 insn = BA + 0;
10682 bfd_put_32 (output_bfd, insn, p);
10683 p += 4;
10684 }
10685 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10686
10687 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10688 + htab->glink->output_section->vma
10689 + htab->glink->output_offset);
10690
10691 bfd_put_32 (output_bfd,
10692 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10693 bfd_put_32 (output_bfd,
10694 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10695 bfd_put_32 (output_bfd,
10696 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10697 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10698 {
10699 bfd_put_32 (output_bfd,
10700 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10701 bfd_put_32 (output_bfd,
10702 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10703 }
10704 else
10705 {
10706 bfd_put_32 (output_bfd,
10707 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10708 bfd_put_32 (output_bfd,
10709 LWZ_12_12 + 4, p + 9*4);
10710 }
10711 }
10712 else
10713 {
10714 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10715 {
10716 unsigned int insn = plt_resolve[i];
10717
10718 if (htab->params->ppc476_workaround && insn == NOP)
10719 insn = BA + 0;
10720 bfd_put_32 (output_bfd, insn, p);
10721 p += 4;
10722 }
10723 p -= 4 * ARRAY_SIZE (plt_resolve);
10724
10725 bfd_put_32 (output_bfd,
10726 LIS_12 + PPC_HA (got + 4), p + 0*4);
10727 bfd_put_32 (output_bfd,
10728 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10729 bfd_put_32 (output_bfd,
10730 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10731 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10732 {
10733 bfd_put_32 (output_bfd,
10734 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10735 bfd_put_32 (output_bfd,
10736 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10737 }
10738 else
10739 {
10740 bfd_put_32 (output_bfd,
10741 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10742 bfd_put_32 (output_bfd,
10743 LWZ_12_12 + 4, p + 6*4);
10744 }
10745 }
10746 }
10747
10748 if (htab->glink_eh_frame != NULL
10749 && htab->glink_eh_frame->contents != NULL)
10750 {
10751 unsigned char *p = htab->glink_eh_frame->contents;
10752 bfd_vma val;
10753
10754 p += sizeof (glink_eh_frame_cie);
10755 /* FDE length. */
10756 p += 4;
10757 /* CIE pointer. */
10758 p += 4;
10759 /* Offset to .glink. */
10760 val = (htab->glink->output_section->vma
10761 + htab->glink->output_offset);
10762 val -= (htab->glink_eh_frame->output_section->vma
10763 + htab->glink_eh_frame->output_offset);
10764 val -= p - htab->glink_eh_frame->contents;
10765 bfd_put_32 (htab->elf.dynobj, val, p);
10766
10767 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10768 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10769 htab->glink_eh_frame,
10770 htab->glink_eh_frame->contents))
10771 return FALSE;
10772 }
10773
10774 return ret;
10775 }
10776 \f
10777 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10778 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10779 #define TARGET_BIG_SYM powerpc_elf32_vec
10780 #define TARGET_BIG_NAME "elf32-powerpc"
10781 #define ELF_ARCH bfd_arch_powerpc
10782 #define ELF_TARGET_ID PPC32_ELF_DATA
10783 #define ELF_MACHINE_CODE EM_PPC
10784 #ifdef __QNXTARGET__
10785 #define ELF_MAXPAGESIZE 0x1000
10786 #define ELF_COMMONPAGESIZE 0x1000
10787 #else
10788 #define ELF_MAXPAGESIZE 0x10000
10789 #define ELF_COMMONPAGESIZE 0x10000
10790 #endif
10791 #define ELF_MINPAGESIZE 0x1000
10792 #define elf_info_to_howto ppc_elf_info_to_howto
10793
10794 #ifdef EM_CYGNUS_POWERPC
10795 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10796 #endif
10797
10798 #ifdef EM_PPC_OLD
10799 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10800 #endif
10801
10802 #define elf_backend_plt_not_loaded 1
10803 #define elf_backend_want_dynrelro 1
10804 #define elf_backend_can_gc_sections 1
10805 #define elf_backend_can_refcount 1
10806 #define elf_backend_rela_normal 1
10807 #define elf_backend_caches_rawsize 1
10808
10809 #define bfd_elf32_mkobject ppc_elf_mkobject
10810 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10811 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10812 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10813 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10814 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10815 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10816 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10817
10818 #define elf_backend_object_p ppc_elf_object_p
10819 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10820 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10821 #define elf_backend_relocate_section ppc_elf_relocate_section
10822 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10823 #define elf_backend_check_relocs ppc_elf_check_relocs
10824 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
10825 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10826 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10827 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10828 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10829 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10830 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10831 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10832 #define elf_backend_fake_sections ppc_elf_fake_sections
10833 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10834 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10835 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10836 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10837 #define elf_backend_write_core_note ppc_elf_write_core_note
10838 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10839 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10840 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10841 #define elf_backend_write_section ppc_elf_write_section
10842 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10843 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10844 #define elf_backend_action_discarded ppc_elf_action_discarded
10845 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10846 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10847
10848 #include "elf32-target.h"
10849
10850 /* FreeBSD Target */
10851
10852 #undef TARGET_LITTLE_SYM
10853 #undef TARGET_LITTLE_NAME
10854
10855 #undef TARGET_BIG_SYM
10856 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10857 #undef TARGET_BIG_NAME
10858 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10859
10860 #undef ELF_OSABI
10861 #define ELF_OSABI ELFOSABI_FREEBSD
10862
10863 #undef elf32_bed
10864 #define elf32_bed elf32_powerpc_fbsd_bed
10865
10866 #include "elf32-target.h"
10867
10868 /* VxWorks Target */
10869
10870 #undef TARGET_LITTLE_SYM
10871 #undef TARGET_LITTLE_NAME
10872
10873 #undef TARGET_BIG_SYM
10874 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10875 #undef TARGET_BIG_NAME
10876 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10877
10878 #undef ELF_OSABI
10879
10880 /* VxWorks uses the elf default section flags for .plt. */
10881 static const struct bfd_elf_special_section *
10882 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
10883 {
10884 if (sec->name == NULL)
10885 return NULL;
10886
10887 if (strcmp (sec->name, ".plt") == 0)
10888 return _bfd_elf_get_sec_type_attr (abfd, sec);
10889
10890 return ppc_elf_get_sec_type_attr (abfd, sec);
10891 }
10892
10893 /* Like ppc_elf_link_hash_table_create, but overrides
10894 appropriately for VxWorks. */
10895 static struct bfd_link_hash_table *
10896 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10897 {
10898 struct bfd_link_hash_table *ret;
10899
10900 ret = ppc_elf_link_hash_table_create (abfd);
10901 if (ret)
10902 {
10903 struct ppc_elf_link_hash_table *htab
10904 = (struct ppc_elf_link_hash_table *)ret;
10905 htab->is_vxworks = 1;
10906 htab->plt_type = PLT_VXWORKS;
10907 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10908 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10909 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10910 }
10911 return ret;
10912 }
10913
10914 /* Tweak magic VxWorks symbols as they are loaded. */
10915 static bfd_boolean
10916 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10917 struct bfd_link_info *info,
10918 Elf_Internal_Sym *sym,
10919 const char **namep,
10920 flagword *flagsp,
10921 asection **secp,
10922 bfd_vma *valp)
10923 {
10924 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
10925 valp))
10926 return FALSE;
10927
10928 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
10929 }
10930
10931 static void
10932 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10933 {
10934 ppc_elf_final_write_processing (abfd, linker);
10935 elf_vxworks_final_write_processing (abfd, linker);
10936 }
10937
10938 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10939 define it. */
10940 #undef elf_backend_want_plt_sym
10941 #define elf_backend_want_plt_sym 1
10942 #undef elf_backend_want_got_plt
10943 #define elf_backend_want_got_plt 1
10944 #undef elf_backend_got_symbol_offset
10945 #define elf_backend_got_symbol_offset 0
10946 #undef elf_backend_plt_not_loaded
10947 #define elf_backend_plt_not_loaded 0
10948 #undef elf_backend_plt_readonly
10949 #define elf_backend_plt_readonly 1
10950 #undef elf_backend_got_header_size
10951 #define elf_backend_got_header_size 12
10952 #undef elf_backend_dtrel_excludes_plt
10953 #define elf_backend_dtrel_excludes_plt 1
10954
10955 #undef bfd_elf32_get_synthetic_symtab
10956
10957 #undef bfd_elf32_bfd_link_hash_table_create
10958 #define bfd_elf32_bfd_link_hash_table_create \
10959 ppc_elf_vxworks_link_hash_table_create
10960 #undef elf_backend_add_symbol_hook
10961 #define elf_backend_add_symbol_hook \
10962 ppc_elf_vxworks_add_symbol_hook
10963 #undef elf_backend_link_output_symbol_hook
10964 #define elf_backend_link_output_symbol_hook \
10965 elf_vxworks_link_output_symbol_hook
10966 #undef elf_backend_final_write_processing
10967 #define elf_backend_final_write_processing \
10968 ppc_elf_vxworks_final_write_processing
10969 #undef elf_backend_get_sec_type_attr
10970 #define elf_backend_get_sec_type_attr \
10971 ppc_elf_vxworks_get_sec_type_attr
10972 #undef elf_backend_emit_relocs
10973 #define elf_backend_emit_relocs \
10974 elf_vxworks_emit_relocs
10975
10976 #undef elf32_bed
10977 #define elf32_bed ppc_elf_vxworks_bed
10978 #undef elf_backend_post_process_headers
10979
10980 #include "elf32-target.h"