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[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2016 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38
39 typedef enum split16_format_type
40 {
41 split16a_type = 0,
42 split16d_type
43 }
44 split16_format_type;
45
46 /* RELA relocations are used here. */
47
48 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc_elf_unhandled_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52
53 /* Branch prediction bit for branch taken relocs. */
54 #define BRANCH_PREDICT_BIT 0x200000
55 /* Mask to set RA in memory instructions. */
56 #define RA_REGISTER_MASK 0x001f0000
57 /* Value to shift register by to insert RA. */
58 #define RA_REGISTER_SHIFT 16
59
60 /* The name of the dynamic interpreter. This is put in the .interp
61 section. */
62 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
63
64 /* For old-style PLT. */
65 /* The number of single-slot PLT entries (the rest use two slots). */
66 #define PLT_NUM_SINGLE_ENTRIES 8192
67
68 /* For new-style .glink and .plt. */
69 #define GLINK_PLTRESOLVE 16*4
70 #define GLINK_ENTRY_SIZE 4*4
71 #define TLS_GET_ADDR_GLINK_SIZE 12*4
72
73 /* VxWorks uses its own plt layout, filled in by the static linker. */
74
75 /* The standard VxWorks PLT entry. */
76 #define VXWORKS_PLT_ENTRY_SIZE 32
77 static const bfd_vma ppc_elf_vxworks_plt_entry
78 [VXWORKS_PLT_ENTRY_SIZE / 4] =
79 {
80 0x3d800000, /* lis r12,0 */
81 0x818c0000, /* lwz r12,0(r12) */
82 0x7d8903a6, /* mtctr r12 */
83 0x4e800420, /* bctr */
84 0x39600000, /* li r11,0 */
85 0x48000000, /* b 14 <.PLT0resolve+0x4> */
86 0x60000000, /* nop */
87 0x60000000, /* nop */
88 };
89 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
90 [VXWORKS_PLT_ENTRY_SIZE / 4] =
91 {
92 0x3d9e0000, /* addis r12,r30,0 */
93 0x818c0000, /* lwz r12,0(r12) */
94 0x7d8903a6, /* mtctr r12 */
95 0x4e800420, /* bctr */
96 0x39600000, /* li r11,0 */
97 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
98 0x60000000, /* nop */
99 0x60000000, /* nop */
100 };
101
102 /* The initial VxWorks PLT entry. */
103 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
104 static const bfd_vma ppc_elf_vxworks_plt0_entry
105 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
106 {
107 0x3d800000, /* lis r12,0 */
108 0x398c0000, /* addi r12,r12,0 */
109 0x800c0008, /* lwz r0,8(r12) */
110 0x7c0903a6, /* mtctr r0 */
111 0x818c0004, /* lwz r12,4(r12) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 };
116 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
117 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
118 {
119 0x819e0008, /* lwz r12,8(r30) */
120 0x7d8903a6, /* mtctr r12 */
121 0x819e0004, /* lwz r12,4(r30) */
122 0x4e800420, /* bctr */
123 0x60000000, /* nop */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 };
128
129 /* For executables, we have some additional relocations in
130 .rela.plt.unloaded, for the kernel loader. */
131
132 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
133 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
134 /* The number of relocations in the PLTResolve slot. */
135 #define VXWORKS_PLTRESOLVE_RELOCS 2
136 /* The number of relocations in the PLTResolve slot when when creating
137 a shared library. */
138 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
139
140 /* Some instructions. */
141 #define ADDIS_11_11 0x3d6b0000
142 #define ADDIS_11_30 0x3d7e0000
143 #define ADDIS_12_12 0x3d8c0000
144 #define ADDI_11_11 0x396b0000
145 #define ADD_0_11_11 0x7c0b5a14
146 #define ADD_3_12_2 0x7c6c1214
147 #define ADD_11_0_11 0x7d605a14
148 #define B 0x48000000
149 #define BA 0x48000002
150 #define BCL_20_31 0x429f0005
151 #define BCTR 0x4e800420
152 #define BEQLR 0x4d820020
153 #define CMPWI_11_0 0x2c0b0000
154 #define LIS_11 0x3d600000
155 #define LIS_12 0x3d800000
156 #define LWZU_0_12 0x840c0000
157 #define LWZ_0_12 0x800c0000
158 #define LWZ_11_3 0x81630000
159 #define LWZ_11_11 0x816b0000
160 #define LWZ_11_30 0x817e0000
161 #define LWZ_12_3 0x81830000
162 #define LWZ_12_12 0x818c0000
163 #define MR_0_3 0x7c601b78
164 #define MR_3_0 0x7c030378
165 #define MFLR_0 0x7c0802a6
166 #define MFLR_12 0x7d8802a6
167 #define MTCTR_0 0x7c0903a6
168 #define MTCTR_11 0x7d6903a6
169 #define MTLR_0 0x7c0803a6
170 #define NOP 0x60000000
171 #define SUB_11_11_12 0x7d6c5850
172
173 /* Offset of tp and dtp pointers from start of TLS block. */
174 #define TP_OFFSET 0x7000
175 #define DTP_OFFSET 0x8000
176
177 /* The value of a defined global symbol. */
178 #define SYM_VAL(SYM) \
179 ((SYM)->root.u.def.section->output_section->vma \
180 + (SYM)->root.u.def.section->output_offset \
181 + (SYM)->root.u.def.value)
182 \f
183 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
184
185 static reloc_howto_type ppc_elf_howto_raw[] = {
186 /* This reloc does nothing. */
187 HOWTO (R_PPC_NONE, /* type */
188 0, /* rightshift */
189 3, /* size (0 = byte, 1 = short, 2 = long) */
190 0, /* bitsize */
191 FALSE, /* pc_relative */
192 0, /* bitpos */
193 complain_overflow_dont, /* complain_on_overflow */
194 bfd_elf_generic_reloc, /* special_function */
195 "R_PPC_NONE", /* name */
196 FALSE, /* partial_inplace */
197 0, /* src_mask */
198 0, /* dst_mask */
199 FALSE), /* pcrel_offset */
200
201 /* A standard 32 bit relocation. */
202 HOWTO (R_PPC_ADDR32, /* type */
203 0, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 32, /* bitsize */
206 FALSE, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_dont, /* complain_on_overflow */
209 bfd_elf_generic_reloc, /* special_function */
210 "R_PPC_ADDR32", /* name */
211 FALSE, /* partial_inplace */
212 0, /* src_mask */
213 0xffffffff, /* dst_mask */
214 FALSE), /* pcrel_offset */
215
216 /* An absolute 26 bit branch; the lower two bits must be zero.
217 FIXME: we don't check that, we just clear them. */
218 HOWTO (R_PPC_ADDR24, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 26, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_signed, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_PPC_ADDR24", /* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0x3fffffc, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* A standard 16 bit relocation. */
233 HOWTO (R_PPC_ADDR16, /* type */
234 0, /* rightshift */
235 1, /* size (0 = byte, 1 = short, 2 = long) */
236 16, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_bitfield, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_PPC_ADDR16", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0xffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* A 16 bit relocation without overflow. */
248 HOWTO (R_PPC_ADDR16_LO, /* type */
249 0, /* rightshift */
250 1, /* size (0 = byte, 1 = short, 2 = long) */
251 16, /* bitsize */
252 FALSE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_dont,/* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_PPC_ADDR16_LO", /* name */
257 FALSE, /* partial_inplace */
258 0, /* src_mask */
259 0xffff, /* dst_mask */
260 FALSE), /* pcrel_offset */
261
262 /* The high order 16 bits of an address. */
263 HOWTO (R_PPC_ADDR16_HI, /* type */
264 16, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_dont, /* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_PPC_ADDR16_HI", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* The high order 16 bits of an address, plus 1 if the contents of
278 the low 16 bits, treated as a signed number, is negative. */
279 HOWTO (R_PPC_ADDR16_HA, /* type */
280 16, /* rightshift */
281 1, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_dont, /* complain_on_overflow */
286 ppc_elf_addr16_ha_reloc, /* special_function */
287 "R_PPC_ADDR16_HA", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xffff, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* An absolute 16 bit branch; the lower two bits must be zero.
294 FIXME: we don't check that, we just clear them. */
295 HOWTO (R_PPC_ADDR14, /* type */
296 0, /* rightshift */
297 2, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_signed, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC_ADDR14", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xfffc, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* An absolute 16 bit branch, for which bit 10 should be set to
310 indicate that the branch is expected to be taken. The lower two
311 bits must be zero. */
312 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
313 0, /* rightshift */
314 2, /* size (0 = byte, 1 = short, 2 = long) */
315 16, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_signed, /* complain_on_overflow */
319 bfd_elf_generic_reloc, /* special_function */
320 "R_PPC_ADDR14_BRTAKEN",/* name */
321 FALSE, /* partial_inplace */
322 0, /* src_mask */
323 0xfffc, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 /* An absolute 16 bit branch, for which bit 10 should be set to
327 indicate that the branch is not expected to be taken. The lower
328 two bits must be zero. */
329 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
330 0, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 16, /* bitsize */
333 FALSE, /* pc_relative */
334 0, /* bitpos */
335 complain_overflow_signed, /* complain_on_overflow */
336 bfd_elf_generic_reloc, /* special_function */
337 "R_PPC_ADDR14_BRNTAKEN",/* name */
338 FALSE, /* partial_inplace */
339 0, /* src_mask */
340 0xfffc, /* dst_mask */
341 FALSE), /* pcrel_offset */
342
343 /* A relative 26 bit branch; the lower two bits must be zero. */
344 HOWTO (R_PPC_REL24, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 26, /* bitsize */
348 TRUE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_signed, /* complain_on_overflow */
351 bfd_elf_generic_reloc, /* special_function */
352 "R_PPC_REL24", /* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x3fffffc, /* dst_mask */
356 TRUE), /* pcrel_offset */
357
358 /* A relative 16 bit branch; the lower two bits must be zero. */
359 HOWTO (R_PPC_REL14, /* type */
360 0, /* rightshift */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
362 16, /* bitsize */
363 TRUE, /* pc_relative */
364 0, /* bitpos */
365 complain_overflow_signed, /* complain_on_overflow */
366 bfd_elf_generic_reloc, /* special_function */
367 "R_PPC_REL14", /* name */
368 FALSE, /* partial_inplace */
369 0, /* src_mask */
370 0xfffc, /* dst_mask */
371 TRUE), /* pcrel_offset */
372
373 /* A relative 16 bit branch. Bit 10 should be set to indicate that
374 the branch is expected to be taken. The lower two bits must be
375 zero. */
376 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 16, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 bfd_elf_generic_reloc, /* special_function */
384 "R_PPC_REL14_BRTAKEN", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0xfffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch. Bit 10 should be set to indicate that
391 the branch is not expected to be taken. The lower two bits must
392 be zero. */
393 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
394 0, /* rightshift */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 TRUE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 bfd_elf_generic_reloc, /* special_function */
401 "R_PPC_REL14_BRNTAKEN",/* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0xfffc, /* dst_mask */
405 TRUE), /* pcrel_offset */
406
407 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
408 symbol. */
409 HOWTO (R_PPC_GOT16, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_signed, /* complain_on_overflow */
416 ppc_elf_unhandled_reloc, /* special_function */
417 "R_PPC_GOT16", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
424 the symbol. */
425 HOWTO (R_PPC_GOT16_LO, /* type */
426 0, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_dont, /* complain_on_overflow */
432 ppc_elf_unhandled_reloc, /* special_function */
433 "R_PPC_GOT16_LO", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
440 the symbol. */
441 HOWTO (R_PPC_GOT16_HI, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_dont, /* complain_on_overflow */
448 ppc_elf_unhandled_reloc, /* special_function */
449 "R_PPC_GOT16_HI", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC_GOT16_HA, /* type */
458 16, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc_elf_unhandled_reloc, /* special_function */
465 "R_PPC_GOT16_HA", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC_REL24, but referring to the procedure linkage table
472 entry for the symbol. */
473 HOWTO (R_PPC_PLTREL24, /* type */
474 0, /* rightshift */
475 2, /* size (0 = byte, 1 = short, 2 = long) */
476 26, /* bitsize */
477 TRUE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_signed, /* complain_on_overflow */
480 ppc_elf_unhandled_reloc, /* special_function */
481 "R_PPC_PLTREL24", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0x3fffffc, /* dst_mask */
485 TRUE), /* pcrel_offset */
486
487 /* This is used only by the dynamic linker. The symbol should exist
488 both in the object being run and in some shared library. The
489 dynamic linker copies the data addressed by the symbol from the
490 shared library into the object, because the object being
491 run has to have the data at some particular address. */
492 HOWTO (R_PPC_COPY, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 32, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_dont, /* complain_on_overflow */
499 ppc_elf_unhandled_reloc, /* special_function */
500 "R_PPC_COPY", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* Like R_PPC_ADDR32, but used when setting global offset table
507 entries. */
508 HOWTO (R_PPC_GLOB_DAT, /* type */
509 0, /* rightshift */
510 2, /* size (0 = byte, 1 = short, 2 = long) */
511 32, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc_elf_unhandled_reloc, /* special_function */
516 "R_PPC_GLOB_DAT", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0xffffffff, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Marks a procedure linkage table entry for a symbol. */
523 HOWTO (R_PPC_JMP_SLOT, /* type */
524 0, /* rightshift */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
526 32, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_dont, /* complain_on_overflow */
530 ppc_elf_unhandled_reloc, /* special_function */
531 "R_PPC_JMP_SLOT", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Used only by the dynamic linker. When the object is run, this
538 longword is set to the load address of the object, plus the
539 addend. */
540 HOWTO (R_PPC_RELATIVE, /* type */
541 0, /* rightshift */
542 2, /* size (0 = byte, 1 = short, 2 = long) */
543 32, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 bfd_elf_generic_reloc, /* special_function */
548 "R_PPC_RELATIVE", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0xffffffff, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Like R_PPC_REL24, but uses the value of the symbol within the
555 object rather than the final value. Normally used for
556 _GLOBAL_OFFSET_TABLE_. */
557 HOWTO (R_PPC_LOCAL24PC, /* type */
558 0, /* rightshift */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
560 26, /* bitsize */
561 TRUE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_signed, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC_LOCAL24PC", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 0x3fffffc, /* dst_mask */
569 TRUE), /* pcrel_offset */
570
571 /* Like R_PPC_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_dont, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative */
602 HOWTO (R_PPC_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_dont, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC_REL32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0xffffffff, /* dst_mask */
614 TRUE), /* pcrel_offset */
615
616 /* 32-bit relocation to the symbol's procedure linkage table.
617 FIXME: not supported. */
618 HOWTO (R_PPC_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_dont, /* complain_on_overflow */
625 ppc_elf_unhandled_reloc, /* special_function */
626 "R_PPC_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: not supported. */
634 HOWTO (R_PPC_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont, /* complain_on_overflow */
641 ppc_elf_unhandled_reloc, /* special_function */
642 "R_PPC_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc_elf_unhandled_reloc, /* special_function */
658 "R_PPC_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 ppc_elf_unhandled_reloc, /* special_function */
674 "R_PPC_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc_elf_unhandled_reloc, /* special_function */
690 "R_PPC_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
697 small data items. */
698 HOWTO (R_PPC_SDAREL16, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_signed, /* complain_on_overflow */
705 ppc_elf_unhandled_reloc, /* special_function */
706 "R_PPC_SDAREL16", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* 16-bit section relative relocation. */
713 HOWTO (R_PPC_SECTOFF, /* type */
714 0, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_signed, /* complain_on_overflow */
720 ppc_elf_unhandled_reloc, /* special_function */
721 "R_PPC_SECTOFF", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit lower half section relative relocation. */
728 HOWTO (R_PPC_SECTOFF_LO, /* type */
729 0, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 ppc_elf_unhandled_reloc, /* special_function */
736 "R_PPC_SECTOFF_LO", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* 16-bit upper half section relative relocation. */
743 HOWTO (R_PPC_SECTOFF_HI, /* type */
744 16, /* rightshift */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
746 16, /* bitsize */
747 FALSE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 ppc_elf_unhandled_reloc, /* special_function */
751 "R_PPC_SECTOFF_HI", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE), /* pcrel_offset */
756
757 /* 16-bit upper half adjusted section relative relocation. */
758 HOWTO (R_PPC_SECTOFF_HA, /* type */
759 16, /* rightshift */
760 1, /* size (0 = byte, 1 = short, 2 = long) */
761 16, /* bitsize */
762 FALSE, /* pc_relative */
763 0, /* bitpos */
764 complain_overflow_dont, /* complain_on_overflow */
765 ppc_elf_unhandled_reloc, /* special_function */
766 "R_PPC_SECTOFF_HA", /* name */
767 FALSE, /* partial_inplace */
768 0, /* src_mask */
769 0xffff, /* dst_mask */
770 FALSE), /* pcrel_offset */
771
772 /* Marker relocs for TLS. */
773 HOWTO (R_PPC_TLS,
774 0, /* rightshift */
775 2, /* size (0 = byte, 1 = short, 2 = long) */
776 32, /* bitsize */
777 FALSE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont, /* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 "R_PPC_TLS", /* name */
782 FALSE, /* partial_inplace */
783 0, /* src_mask */
784 0, /* dst_mask */
785 FALSE), /* pcrel_offset */
786
787 HOWTO (R_PPC_TLSGD,
788 0, /* rightshift */
789 2, /* size (0 = byte, 1 = short, 2 = long) */
790 32, /* bitsize */
791 FALSE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_dont, /* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_PPC_TLSGD", /* name */
796 FALSE, /* partial_inplace */
797 0, /* src_mask */
798 0, /* dst_mask */
799 FALSE), /* pcrel_offset */
800
801 HOWTO (R_PPC_TLSLD,
802 0, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 32, /* bitsize */
805 FALSE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_dont, /* complain_on_overflow */
808 bfd_elf_generic_reloc, /* special_function */
809 "R_PPC_TLSLD", /* name */
810 FALSE, /* partial_inplace */
811 0, /* src_mask */
812 0, /* dst_mask */
813 FALSE), /* pcrel_offset */
814
815 /* Computes the load module index of the load module that contains the
816 definition of its TLS sym. */
817 HOWTO (R_PPC_DTPMOD32,
818 0, /* rightshift */
819 2, /* size (0 = byte, 1 = short, 2 = long) */
820 32, /* bitsize */
821 FALSE, /* pc_relative */
822 0, /* bitpos */
823 complain_overflow_dont, /* complain_on_overflow */
824 ppc_elf_unhandled_reloc, /* special_function */
825 "R_PPC_DTPMOD32", /* name */
826 FALSE, /* partial_inplace */
827 0, /* src_mask */
828 0xffffffff, /* dst_mask */
829 FALSE), /* pcrel_offset */
830
831 /* Computes a dtv-relative displacement, the difference between the value
832 of sym+add and the base address of the thread-local storage block that
833 contains the definition of sym, minus 0x8000. */
834 HOWTO (R_PPC_DTPREL32,
835 0, /* rightshift */
836 2, /* size (0 = byte, 1 = short, 2 = long) */
837 32, /* bitsize */
838 FALSE, /* pc_relative */
839 0, /* bitpos */
840 complain_overflow_dont, /* complain_on_overflow */
841 ppc_elf_unhandled_reloc, /* special_function */
842 "R_PPC_DTPREL32", /* name */
843 FALSE, /* partial_inplace */
844 0, /* src_mask */
845 0xffffffff, /* dst_mask */
846 FALSE), /* pcrel_offset */
847
848 /* A 16 bit dtprel reloc. */
849 HOWTO (R_PPC_DTPREL16,
850 0, /* rightshift */
851 1, /* size (0 = byte, 1 = short, 2 = long) */
852 16, /* bitsize */
853 FALSE, /* pc_relative */
854 0, /* bitpos */
855 complain_overflow_signed, /* complain_on_overflow */
856 ppc_elf_unhandled_reloc, /* special_function */
857 "R_PPC_DTPREL16", /* name */
858 FALSE, /* partial_inplace */
859 0, /* src_mask */
860 0xffff, /* dst_mask */
861 FALSE), /* pcrel_offset */
862
863 /* Like DTPREL16, but no overflow. */
864 HOWTO (R_PPC_DTPREL16_LO,
865 0, /* rightshift */
866 1, /* size (0 = byte, 1 = short, 2 = long) */
867 16, /* bitsize */
868 FALSE, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont, /* complain_on_overflow */
871 ppc_elf_unhandled_reloc, /* special_function */
872 "R_PPC_DTPREL16_LO", /* name */
873 FALSE, /* partial_inplace */
874 0, /* src_mask */
875 0xffff, /* dst_mask */
876 FALSE), /* pcrel_offset */
877
878 /* Like DTPREL16_LO, but next higher group of 16 bits. */
879 HOWTO (R_PPC_DTPREL16_HI,
880 16, /* rightshift */
881 1, /* size (0 = byte, 1 = short, 2 = long) */
882 16, /* bitsize */
883 FALSE, /* pc_relative */
884 0, /* bitpos */
885 complain_overflow_dont, /* complain_on_overflow */
886 ppc_elf_unhandled_reloc, /* special_function */
887 "R_PPC_DTPREL16_HI", /* name */
888 FALSE, /* partial_inplace */
889 0, /* src_mask */
890 0xffff, /* dst_mask */
891 FALSE), /* pcrel_offset */
892
893 /* Like DTPREL16_HI, but adjust for low 16 bits. */
894 HOWTO (R_PPC_DTPREL16_HA,
895 16, /* rightshift */
896 1, /* size (0 = byte, 1 = short, 2 = long) */
897 16, /* bitsize */
898 FALSE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont, /* complain_on_overflow */
901 ppc_elf_unhandled_reloc, /* special_function */
902 "R_PPC_DTPREL16_HA", /* name */
903 FALSE, /* partial_inplace */
904 0, /* src_mask */
905 0xffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
907
908 /* Computes a tp-relative displacement, the difference between the value of
909 sym+add and the value of the thread pointer (r13). */
910 HOWTO (R_PPC_TPREL32,
911 0, /* rightshift */
912 2, /* size (0 = byte, 1 = short, 2 = long) */
913 32, /* bitsize */
914 FALSE, /* pc_relative */
915 0, /* bitpos */
916 complain_overflow_dont, /* complain_on_overflow */
917 ppc_elf_unhandled_reloc, /* special_function */
918 "R_PPC_TPREL32", /* name */
919 FALSE, /* partial_inplace */
920 0, /* src_mask */
921 0xffffffff, /* dst_mask */
922 FALSE), /* pcrel_offset */
923
924 /* A 16 bit tprel reloc. */
925 HOWTO (R_PPC_TPREL16,
926 0, /* rightshift */
927 1, /* size (0 = byte, 1 = short, 2 = long) */
928 16, /* bitsize */
929 FALSE, /* pc_relative */
930 0, /* bitpos */
931 complain_overflow_signed, /* complain_on_overflow */
932 ppc_elf_unhandled_reloc, /* special_function */
933 "R_PPC_TPREL16", /* name */
934 FALSE, /* partial_inplace */
935 0, /* src_mask */
936 0xffff, /* dst_mask */
937 FALSE), /* pcrel_offset */
938
939 /* Like TPREL16, but no overflow. */
940 HOWTO (R_PPC_TPREL16_LO,
941 0, /* rightshift */
942 1, /* size (0 = byte, 1 = short, 2 = long) */
943 16, /* bitsize */
944 FALSE, /* pc_relative */
945 0, /* bitpos */
946 complain_overflow_dont, /* complain_on_overflow */
947 ppc_elf_unhandled_reloc, /* special_function */
948 "R_PPC_TPREL16_LO", /* name */
949 FALSE, /* partial_inplace */
950 0, /* src_mask */
951 0xffff, /* dst_mask */
952 FALSE), /* pcrel_offset */
953
954 /* Like TPREL16_LO, but next higher group of 16 bits. */
955 HOWTO (R_PPC_TPREL16_HI,
956 16, /* rightshift */
957 1, /* size (0 = byte, 1 = short, 2 = long) */
958 16, /* bitsize */
959 FALSE, /* pc_relative */
960 0, /* bitpos */
961 complain_overflow_dont, /* complain_on_overflow */
962 ppc_elf_unhandled_reloc, /* special_function */
963 "R_PPC_TPREL16_HI", /* name */
964 FALSE, /* partial_inplace */
965 0, /* src_mask */
966 0xffff, /* dst_mask */
967 FALSE), /* pcrel_offset */
968
969 /* Like TPREL16_HI, but adjust for low 16 bits. */
970 HOWTO (R_PPC_TPREL16_HA,
971 16, /* rightshift */
972 1, /* size (0 = byte, 1 = short, 2 = long) */
973 16, /* bitsize */
974 FALSE, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_dont, /* complain_on_overflow */
977 ppc_elf_unhandled_reloc, /* special_function */
978 "R_PPC_TPREL16_HA", /* name */
979 FALSE, /* partial_inplace */
980 0, /* src_mask */
981 0xffff, /* dst_mask */
982 FALSE), /* pcrel_offset */
983
984 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
985 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
986 to the first entry. */
987 HOWTO (R_PPC_GOT_TLSGD16,
988 0, /* rightshift */
989 1, /* size (0 = byte, 1 = short, 2 = long) */
990 16, /* bitsize */
991 FALSE, /* pc_relative */
992 0, /* bitpos */
993 complain_overflow_signed, /* complain_on_overflow */
994 ppc_elf_unhandled_reloc, /* special_function */
995 "R_PPC_GOT_TLSGD16", /* name */
996 FALSE, /* partial_inplace */
997 0, /* src_mask */
998 0xffff, /* dst_mask */
999 FALSE), /* pcrel_offset */
1000
1001 /* Like GOT_TLSGD16, but no overflow. */
1002 HOWTO (R_PPC_GOT_TLSGD16_LO,
1003 0, /* rightshift */
1004 1, /* size (0 = byte, 1 = short, 2 = long) */
1005 16, /* bitsize */
1006 FALSE, /* pc_relative */
1007 0, /* bitpos */
1008 complain_overflow_dont, /* complain_on_overflow */
1009 ppc_elf_unhandled_reloc, /* special_function */
1010 "R_PPC_GOT_TLSGD16_LO", /* name */
1011 FALSE, /* partial_inplace */
1012 0, /* src_mask */
1013 0xffff, /* dst_mask */
1014 FALSE), /* pcrel_offset */
1015
1016 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1017 HOWTO (R_PPC_GOT_TLSGD16_HI,
1018 16, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_dont, /* complain_on_overflow */
1024 ppc_elf_unhandled_reloc, /* special_function */
1025 "R_PPC_GOT_TLSGD16_HI", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1032 HOWTO (R_PPC_GOT_TLSGD16_HA,
1033 16, /* rightshift */
1034 1, /* size (0 = byte, 1 = short, 2 = long) */
1035 16, /* bitsize */
1036 FALSE, /* pc_relative */
1037 0, /* bitpos */
1038 complain_overflow_dont, /* complain_on_overflow */
1039 ppc_elf_unhandled_reloc, /* special_function */
1040 "R_PPC_GOT_TLSGD16_HA", /* name */
1041 FALSE, /* partial_inplace */
1042 0, /* src_mask */
1043 0xffff, /* dst_mask */
1044 FALSE), /* pcrel_offset */
1045
1046 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1047 with values (sym+add)@dtpmod and zero, and computes the offset to the
1048 first entry. */
1049 HOWTO (R_PPC_GOT_TLSLD16,
1050 0, /* rightshift */
1051 1, /* size (0 = byte, 1 = short, 2 = long) */
1052 16, /* bitsize */
1053 FALSE, /* pc_relative */
1054 0, /* bitpos */
1055 complain_overflow_signed, /* complain_on_overflow */
1056 ppc_elf_unhandled_reloc, /* special_function */
1057 "R_PPC_GOT_TLSLD16", /* name */
1058 FALSE, /* partial_inplace */
1059 0, /* src_mask */
1060 0xffff, /* dst_mask */
1061 FALSE), /* pcrel_offset */
1062
1063 /* Like GOT_TLSLD16, but no overflow. */
1064 HOWTO (R_PPC_GOT_TLSLD16_LO,
1065 0, /* rightshift */
1066 1, /* size (0 = byte, 1 = short, 2 = long) */
1067 16, /* bitsize */
1068 FALSE, /* pc_relative */
1069 0, /* bitpos */
1070 complain_overflow_dont, /* complain_on_overflow */
1071 ppc_elf_unhandled_reloc, /* special_function */
1072 "R_PPC_GOT_TLSLD16_LO", /* name */
1073 FALSE, /* partial_inplace */
1074 0, /* src_mask */
1075 0xffff, /* dst_mask */
1076 FALSE), /* pcrel_offset */
1077
1078 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1079 HOWTO (R_PPC_GOT_TLSLD16_HI,
1080 16, /* rightshift */
1081 1, /* size (0 = byte, 1 = short, 2 = long) */
1082 16, /* bitsize */
1083 FALSE, /* pc_relative */
1084 0, /* bitpos */
1085 complain_overflow_dont, /* complain_on_overflow */
1086 ppc_elf_unhandled_reloc, /* special_function */
1087 "R_PPC_GOT_TLSLD16_HI", /* name */
1088 FALSE, /* partial_inplace */
1089 0, /* src_mask */
1090 0xffff, /* dst_mask */
1091 FALSE), /* pcrel_offset */
1092
1093 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1094 HOWTO (R_PPC_GOT_TLSLD16_HA,
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_dont, /* complain_on_overflow */
1101 ppc_elf_unhandled_reloc, /* special_function */
1102 "R_PPC_GOT_TLSLD16_HA", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1109 the offset to the entry. */
1110 HOWTO (R_PPC_GOT_DTPREL16,
1111 0, /* rightshift */
1112 1, /* size (0 = byte, 1 = short, 2 = long) */
1113 16, /* bitsize */
1114 FALSE, /* pc_relative */
1115 0, /* bitpos */
1116 complain_overflow_signed, /* complain_on_overflow */
1117 ppc_elf_unhandled_reloc, /* special_function */
1118 "R_PPC_GOT_DTPREL16", /* name */
1119 FALSE, /* partial_inplace */
1120 0, /* src_mask */
1121 0xffff, /* dst_mask */
1122 FALSE), /* pcrel_offset */
1123
1124 /* Like GOT_DTPREL16, but no overflow. */
1125 HOWTO (R_PPC_GOT_DTPREL16_LO,
1126 0, /* rightshift */
1127 1, /* size (0 = byte, 1 = short, 2 = long) */
1128 16, /* bitsize */
1129 FALSE, /* pc_relative */
1130 0, /* bitpos */
1131 complain_overflow_dont, /* complain_on_overflow */
1132 ppc_elf_unhandled_reloc, /* special_function */
1133 "R_PPC_GOT_DTPREL16_LO", /* name */
1134 FALSE, /* partial_inplace */
1135 0, /* src_mask */
1136 0xffff, /* dst_mask */
1137 FALSE), /* pcrel_offset */
1138
1139 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1140 HOWTO (R_PPC_GOT_DTPREL16_HI,
1141 16, /* rightshift */
1142 1, /* size (0 = byte, 1 = short, 2 = long) */
1143 16, /* bitsize */
1144 FALSE, /* pc_relative */
1145 0, /* bitpos */
1146 complain_overflow_dont, /* complain_on_overflow */
1147 ppc_elf_unhandled_reloc, /* special_function */
1148 "R_PPC_GOT_DTPREL16_HI", /* name */
1149 FALSE, /* partial_inplace */
1150 0, /* src_mask */
1151 0xffff, /* dst_mask */
1152 FALSE), /* pcrel_offset */
1153
1154 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1155 HOWTO (R_PPC_GOT_DTPREL16_HA,
1156 16, /* rightshift */
1157 1, /* size (0 = byte, 1 = short, 2 = long) */
1158 16, /* bitsize */
1159 FALSE, /* pc_relative */
1160 0, /* bitpos */
1161 complain_overflow_dont, /* complain_on_overflow */
1162 ppc_elf_unhandled_reloc, /* special_function */
1163 "R_PPC_GOT_DTPREL16_HA", /* name */
1164 FALSE, /* partial_inplace */
1165 0, /* src_mask */
1166 0xffff, /* dst_mask */
1167 FALSE), /* pcrel_offset */
1168
1169 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1170 offset to the entry. */
1171 HOWTO (R_PPC_GOT_TPREL16,
1172 0, /* rightshift */
1173 1, /* size (0 = byte, 1 = short, 2 = long) */
1174 16, /* bitsize */
1175 FALSE, /* pc_relative */
1176 0, /* bitpos */
1177 complain_overflow_signed, /* complain_on_overflow */
1178 ppc_elf_unhandled_reloc, /* special_function */
1179 "R_PPC_GOT_TPREL16", /* name */
1180 FALSE, /* partial_inplace */
1181 0, /* src_mask */
1182 0xffff, /* dst_mask */
1183 FALSE), /* pcrel_offset */
1184
1185 /* Like GOT_TPREL16, but no overflow. */
1186 HOWTO (R_PPC_GOT_TPREL16_LO,
1187 0, /* rightshift */
1188 1, /* size (0 = byte, 1 = short, 2 = long) */
1189 16, /* bitsize */
1190 FALSE, /* pc_relative */
1191 0, /* bitpos */
1192 complain_overflow_dont, /* complain_on_overflow */
1193 ppc_elf_unhandled_reloc, /* special_function */
1194 "R_PPC_GOT_TPREL16_LO", /* name */
1195 FALSE, /* partial_inplace */
1196 0, /* src_mask */
1197 0xffff, /* dst_mask */
1198 FALSE), /* pcrel_offset */
1199
1200 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1201 HOWTO (R_PPC_GOT_TPREL16_HI,
1202 16, /* rightshift */
1203 1, /* size (0 = byte, 1 = short, 2 = long) */
1204 16, /* bitsize */
1205 FALSE, /* pc_relative */
1206 0, /* bitpos */
1207 complain_overflow_dont, /* complain_on_overflow */
1208 ppc_elf_unhandled_reloc, /* special_function */
1209 "R_PPC_GOT_TPREL16_HI", /* name */
1210 FALSE, /* partial_inplace */
1211 0, /* src_mask */
1212 0xffff, /* dst_mask */
1213 FALSE), /* pcrel_offset */
1214
1215 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1216 HOWTO (R_PPC_GOT_TPREL16_HA,
1217 16, /* rightshift */
1218 1, /* size (0 = byte, 1 = short, 2 = long) */
1219 16, /* bitsize */
1220 FALSE, /* pc_relative */
1221 0, /* bitpos */
1222 complain_overflow_dont, /* complain_on_overflow */
1223 ppc_elf_unhandled_reloc, /* special_function */
1224 "R_PPC_GOT_TPREL16_HA", /* name */
1225 FALSE, /* partial_inplace */
1226 0, /* src_mask */
1227 0xffff, /* dst_mask */
1228 FALSE), /* pcrel_offset */
1229
1230 /* The remaining relocs are from the Embedded ELF ABI, and are not
1231 in the SVR4 ELF ABI. */
1232
1233 /* 32 bit value resulting from the addend minus the symbol. */
1234 HOWTO (R_PPC_EMB_NADDR32, /* type */
1235 0, /* rightshift */
1236 2, /* size (0 = byte, 1 = short, 2 = long) */
1237 32, /* bitsize */
1238 FALSE, /* pc_relative */
1239 0, /* bitpos */
1240 complain_overflow_dont, /* complain_on_overflow */
1241 ppc_elf_unhandled_reloc, /* special_function */
1242 "R_PPC_EMB_NADDR32", /* name */
1243 FALSE, /* partial_inplace */
1244 0, /* src_mask */
1245 0xffffffff, /* dst_mask */
1246 FALSE), /* pcrel_offset */
1247
1248 /* 16 bit value resulting from the addend minus the symbol. */
1249 HOWTO (R_PPC_EMB_NADDR16, /* type */
1250 0, /* rightshift */
1251 1, /* size (0 = byte, 1 = short, 2 = long) */
1252 16, /* bitsize */
1253 FALSE, /* pc_relative */
1254 0, /* bitpos */
1255 complain_overflow_signed, /* complain_on_overflow */
1256 ppc_elf_unhandled_reloc, /* special_function */
1257 "R_PPC_EMB_NADDR16", /* name */
1258 FALSE, /* partial_inplace */
1259 0, /* src_mask */
1260 0xffff, /* dst_mask */
1261 FALSE), /* pcrel_offset */
1262
1263 /* 16 bit value resulting from the addend minus the symbol. */
1264 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1265 0, /* rightshift */
1266 1, /* size (0 = byte, 1 = short, 2 = long) */
1267 16, /* bitsize */
1268 FALSE, /* pc_relative */
1269 0, /* bitpos */
1270 complain_overflow_dont,/* complain_on_overflow */
1271 ppc_elf_unhandled_reloc, /* special_function */
1272 "R_PPC_EMB_ADDR16_LO", /* name */
1273 FALSE, /* partial_inplace */
1274 0, /* src_mask */
1275 0xffff, /* dst_mask */
1276 FALSE), /* pcrel_offset */
1277
1278 /* The high order 16 bits of the addend minus the symbol. */
1279 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1280 16, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc_elf_unhandled_reloc, /* special_function */
1287 "R_PPC_EMB_NADDR16_HI", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xffff, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* The high order 16 bits of the result of the addend minus the address,
1294 plus 1 if the contents of the low 16 bits, treated as a signed number,
1295 is negative. */
1296 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1297 16, /* rightshift */
1298 1, /* size (0 = byte, 1 = short, 2 = long) */
1299 16, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_dont, /* complain_on_overflow */
1303 ppc_elf_unhandled_reloc, /* special_function */
1304 "R_PPC_EMB_NADDR16_HA", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0xffff, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 /* 16 bit value resulting from allocating a 4 byte word to hold an
1311 address in the .sdata section, and returning the offset from
1312 _SDA_BASE_ for that relocation. */
1313 HOWTO (R_PPC_EMB_SDAI16, /* type */
1314 0, /* rightshift */
1315 1, /* size (0 = byte, 1 = short, 2 = long) */
1316 16, /* bitsize */
1317 FALSE, /* pc_relative */
1318 0, /* bitpos */
1319 complain_overflow_signed, /* complain_on_overflow */
1320 ppc_elf_unhandled_reloc, /* special_function */
1321 "R_PPC_EMB_SDAI16", /* name */
1322 FALSE, /* partial_inplace */
1323 0, /* src_mask */
1324 0xffff, /* dst_mask */
1325 FALSE), /* pcrel_offset */
1326
1327 /* 16 bit value resulting from allocating a 4 byte word to hold an
1328 address in the .sdata2 section, and returning the offset from
1329 _SDA2_BASE_ for that relocation. */
1330 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1331 0, /* rightshift */
1332 1, /* size (0 = byte, 1 = short, 2 = long) */
1333 16, /* bitsize */
1334 FALSE, /* pc_relative */
1335 0, /* bitpos */
1336 complain_overflow_signed, /* complain_on_overflow */
1337 ppc_elf_unhandled_reloc, /* special_function */
1338 "R_PPC_EMB_SDA2I16", /* name */
1339 FALSE, /* partial_inplace */
1340 0, /* src_mask */
1341 0xffff, /* dst_mask */
1342 FALSE), /* pcrel_offset */
1343
1344 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1345 small data items. */
1346 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1347 0, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_signed, /* complain_on_overflow */
1353 ppc_elf_unhandled_reloc, /* special_function */
1354 "R_PPC_EMB_SDA2REL", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1361 signed offset from the appropriate base, and filling in the register
1362 field with the appropriate register (0, 2, or 13). */
1363 HOWTO (R_PPC_EMB_SDA21, /* type */
1364 0, /* rightshift */
1365 2, /* size (0 = byte, 1 = short, 2 = long) */
1366 16, /* bitsize */
1367 FALSE, /* pc_relative */
1368 0, /* bitpos */
1369 complain_overflow_signed, /* complain_on_overflow */
1370 ppc_elf_unhandled_reloc, /* special_function */
1371 "R_PPC_EMB_SDA21", /* name */
1372 FALSE, /* partial_inplace */
1373 0, /* src_mask */
1374 0xffff, /* dst_mask */
1375 FALSE), /* pcrel_offset */
1376
1377 /* Relocation not handled: R_PPC_EMB_MRKREF */
1378 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1379 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1380 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1382 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1383
1384 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1385 in the 16 bit signed offset from the appropriate base, and filling in the
1386 register field with the appropriate register (0, 2, or 13). */
1387 HOWTO (R_PPC_EMB_RELSDA, /* type */
1388 0, /* rightshift */
1389 1, /* size (0 = byte, 1 = short, 2 = long) */
1390 16, /* bitsize */
1391 FALSE, /* pc_relative */
1392 0, /* bitpos */
1393 complain_overflow_signed, /* complain_on_overflow */
1394 ppc_elf_unhandled_reloc, /* special_function */
1395 "R_PPC_EMB_RELSDA", /* name */
1396 FALSE, /* partial_inplace */
1397 0, /* src_mask */
1398 0xffff, /* dst_mask */
1399 FALSE), /* pcrel_offset */
1400
1401 /* A relative 8 bit branch. */
1402 HOWTO (R_PPC_VLE_REL8, /* type */
1403 1, /* rightshift */
1404 1, /* size (0 = byte, 1 = short, 2 = long) */
1405 8, /* bitsize */
1406 TRUE, /* pc_relative */
1407 0, /* bitpos */
1408 complain_overflow_signed, /* complain_on_overflow */
1409 bfd_elf_generic_reloc, /* special_function */
1410 "R_PPC_VLE_REL8", /* name */
1411 FALSE, /* partial_inplace */
1412 0, /* src_mask */
1413 0xff, /* dst_mask */
1414 TRUE), /* pcrel_offset */
1415
1416 /* A relative 15 bit branch. */
1417 HOWTO (R_PPC_VLE_REL15, /* type */
1418 1, /* rightshift */
1419 2, /* size (0 = byte, 1 = short, 2 = long) */
1420 15, /* bitsize */
1421 TRUE, /* pc_relative */
1422 1, /* bitpos */
1423 complain_overflow_signed, /* complain_on_overflow */
1424 bfd_elf_generic_reloc, /* special_function */
1425 "R_PPC_VLE_REL15", /* name */
1426 FALSE, /* partial_inplace */
1427 0, /* src_mask */
1428 0xfffe, /* dst_mask */
1429 TRUE), /* pcrel_offset */
1430
1431 /* A relative 24 bit branch. */
1432 HOWTO (R_PPC_VLE_REL24, /* type */
1433 1, /* rightshift */
1434 2, /* size (0 = byte, 1 = short, 2 = long) */
1435 24, /* bitsize */
1436 TRUE, /* pc_relative */
1437 1, /* bitpos */
1438 complain_overflow_signed, /* complain_on_overflow */
1439 bfd_elf_generic_reloc, /* special_function */
1440 "R_PPC_VLE_REL24", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 0x1fffffe, /* dst_mask */
1444 TRUE), /* pcrel_offset */
1445
1446 /* The 16 LSBS in split16a format. */
1447 HOWTO (R_PPC_VLE_LO16A, /* type */
1448 0, /* rightshift */
1449 2, /* size (0 = byte, 1 = short, 2 = long) */
1450 16, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_dont, /* complain_on_overflow */
1454 ppc_elf_unhandled_reloc, /* special_function */
1455 "R_PPC_VLE_LO16A", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0x1f007ff, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 /* The 16 LSBS in split16d format. */
1462 HOWTO (R_PPC_VLE_LO16D, /* type */
1463 0, /* rightshift */
1464 2, /* size (0 = byte, 1 = short, 2 = long) */
1465 16, /* bitsize */
1466 FALSE, /* pc_relative */
1467 0, /* bitpos */
1468 complain_overflow_dont, /* complain_on_overflow */
1469 ppc_elf_unhandled_reloc, /* special_function */
1470 "R_PPC_VLE_LO16D", /* name */
1471 FALSE, /* partial_inplace */
1472 0, /* src_mask */
1473 0x1f07ff, /* dst_mask */
1474 FALSE), /* pcrel_offset */
1475
1476 /* Bits 16-31 split16a format. */
1477 HOWTO (R_PPC_VLE_HI16A, /* type */
1478 16, /* rightshift */
1479 2, /* size (0 = byte, 1 = short, 2 = long) */
1480 16, /* bitsize */
1481 FALSE, /* pc_relative */
1482 0, /* bitpos */
1483 complain_overflow_dont, /* complain_on_overflow */
1484 ppc_elf_unhandled_reloc, /* special_function */
1485 "R_PPC_VLE_HI16A", /* name */
1486 FALSE, /* partial_inplace */
1487 0, /* src_mask */
1488 0x1f007ff, /* dst_mask */
1489 FALSE), /* pcrel_offset */
1490
1491 /* Bits 16-31 split16d format. */
1492 HOWTO (R_PPC_VLE_HI16D, /* type */
1493 16, /* rightshift */
1494 2, /* size (0 = byte, 1 = short, 2 = long) */
1495 16, /* bitsize */
1496 FALSE, /* pc_relative */
1497 0, /* bitpos */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc_elf_unhandled_reloc, /* special_function */
1500 "R_PPC_VLE_HI16D", /* name */
1501 FALSE, /* partial_inplace */
1502 0, /* src_mask */
1503 0x1f07ff, /* dst_mask */
1504 FALSE), /* pcrel_offset */
1505
1506 /* Bits 16-31 (High Adjusted) in split16a format. */
1507 HOWTO (R_PPC_VLE_HA16A, /* type */
1508 16, /* rightshift */
1509 2, /* size (0 = byte, 1 = short, 2 = long) */
1510 16, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_dont, /* complain_on_overflow */
1514 ppc_elf_unhandled_reloc, /* special_function */
1515 "R_PPC_VLE_HA16A", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 0x1f007ff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* Bits 16-31 (High Adjusted) in split16d format. */
1522 HOWTO (R_PPC_VLE_HA16D, /* type */
1523 16, /* rightshift */
1524 2, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc_elf_unhandled_reloc, /* special_function */
1530 "R_PPC_VLE_HA16D", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0x1f07ff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1537 instructions. If the register base is 0 then the linker changes
1538 the e_add16i to an e_li instruction. */
1539 HOWTO (R_PPC_VLE_SDA21, /* type */
1540 0, /* rightshift */
1541 2, /* size (0 = byte, 1 = short, 2 = long) */
1542 16, /* bitsize */
1543 FALSE, /* pc_relative */
1544 0, /* bitpos */
1545 complain_overflow_signed, /* complain_on_overflow */
1546 ppc_elf_unhandled_reloc, /* special_function */
1547 "R_PPC_VLE_SDA21", /* name */
1548 FALSE, /* partial_inplace */
1549 0, /* src_mask */
1550 0xffff, /* dst_mask */
1551 FALSE), /* pcrel_offset */
1552
1553 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1554 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1555 0, /* rightshift */
1556 2, /* size (0 = byte, 1 = short, 2 = long) */
1557 16, /* bitsize */
1558 FALSE, /* pc_relative */
1559 0, /* bitpos */
1560 complain_overflow_dont, /* complain_on_overflow */
1561 ppc_elf_unhandled_reloc, /* special_function */
1562 "R_PPC_VLE_SDA21_LO", /* name */
1563 FALSE, /* partial_inplace */
1564 0, /* src_mask */
1565 0xffff, /* dst_mask */
1566 FALSE), /* pcrel_offset */
1567
1568 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1569 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1570 0, /* rightshift */
1571 2, /* size (0 = byte, 1 = short, 2 = long) */
1572 16, /* bitsize */
1573 FALSE, /* pc_relative */
1574 0, /* bitpos */
1575 complain_overflow_dont, /* complain_on_overflow */
1576 ppc_elf_unhandled_reloc, /* special_function */
1577 "R_PPC_VLE_SDAREL_LO16A", /* name */
1578 FALSE, /* partial_inplace */
1579 0, /* src_mask */
1580 0x1f007ff, /* dst_mask */
1581 FALSE), /* pcrel_offset */
1582
1583 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1584 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1585 0, /* rightshift */
1586 2, /* size (0 = byte, 1 = short, 2 = long) */
1587 16, /* bitsize */
1588 FALSE, /* pc_relative */
1589 0, /* bitpos */
1590 complain_overflow_dont, /* complain_on_overflow */
1591 ppc_elf_unhandled_reloc, /* special_function */
1592 "R_PPC_VLE_SDAREL_LO16D", /* name */
1593 FALSE, /* partial_inplace */
1594 0, /* src_mask */
1595 0x1f07ff, /* dst_mask */
1596 FALSE), /* pcrel_offset */
1597
1598 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1599 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1600 16, /* rightshift */
1601 2, /* size (0 = byte, 1 = short, 2 = long) */
1602 16, /* bitsize */
1603 FALSE, /* pc_relative */
1604 0, /* bitpos */
1605 complain_overflow_dont, /* complain_on_overflow */
1606 ppc_elf_unhandled_reloc, /* special_function */
1607 "R_PPC_VLE_SDAREL_HI16A", /* name */
1608 FALSE, /* partial_inplace */
1609 0, /* src_mask */
1610 0x1f007ff, /* dst_mask */
1611 FALSE), /* pcrel_offset */
1612
1613 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1614 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1615 16, /* rightshift */
1616 2, /* size (0 = byte, 1 = short, 2 = long) */
1617 16, /* bitsize */
1618 FALSE, /* pc_relative */
1619 0, /* bitpos */
1620 complain_overflow_dont, /* complain_on_overflow */
1621 ppc_elf_unhandled_reloc, /* special_function */
1622 "R_PPC_VLE_SDAREL_HI16D", /* name */
1623 FALSE, /* partial_inplace */
1624 0, /* src_mask */
1625 0x1f07ff, /* dst_mask */
1626 FALSE), /* pcrel_offset */
1627
1628 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1629 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1630 16, /* rightshift */
1631 2, /* size (0 = byte, 1 = short, 2 = long) */
1632 16, /* bitsize */
1633 FALSE, /* pc_relative */
1634 0, /* bitpos */
1635 complain_overflow_dont, /* complain_on_overflow */
1636 ppc_elf_unhandled_reloc, /* special_function */
1637 "R_PPC_VLE_SDAREL_HA16A", /* name */
1638 FALSE, /* partial_inplace */
1639 0, /* src_mask */
1640 0x1f007ff, /* dst_mask */
1641 FALSE), /* pcrel_offset */
1642
1643 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1644 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1645 16, /* rightshift */
1646 2, /* size (0 = byte, 1 = short, 2 = long) */
1647 16, /* bitsize */
1648 FALSE, /* pc_relative */
1649 0, /* bitpos */
1650 complain_overflow_dont, /* complain_on_overflow */
1651 ppc_elf_unhandled_reloc, /* special_function */
1652 "R_PPC_VLE_SDAREL_HA16D", /* name */
1653 FALSE, /* partial_inplace */
1654 0, /* src_mask */
1655 0x1f07ff, /* dst_mask */
1656 FALSE), /* pcrel_offset */
1657
1658 HOWTO (R_PPC_IRELATIVE, /* type */
1659 0, /* rightshift */
1660 2, /* size (0 = byte, 1 = short, 2 = long) */
1661 32, /* bitsize */
1662 FALSE, /* pc_relative */
1663 0, /* bitpos */
1664 complain_overflow_dont, /* complain_on_overflow */
1665 ppc_elf_unhandled_reloc, /* special_function */
1666 "R_PPC_IRELATIVE", /* name */
1667 FALSE, /* partial_inplace */
1668 0, /* src_mask */
1669 0xffffffff, /* dst_mask */
1670 FALSE), /* pcrel_offset */
1671
1672 /* A 16 bit relative relocation. */
1673 HOWTO (R_PPC_REL16, /* type */
1674 0, /* rightshift */
1675 1, /* size (0 = byte, 1 = short, 2 = long) */
1676 16, /* bitsize */
1677 TRUE, /* pc_relative */
1678 0, /* bitpos */
1679 complain_overflow_signed, /* complain_on_overflow */
1680 bfd_elf_generic_reloc, /* special_function */
1681 "R_PPC_REL16", /* name */
1682 FALSE, /* partial_inplace */
1683 0, /* src_mask */
1684 0xffff, /* dst_mask */
1685 TRUE), /* pcrel_offset */
1686
1687 /* A 16 bit relative relocation without overflow. */
1688 HOWTO (R_PPC_REL16_LO, /* type */
1689 0, /* rightshift */
1690 1, /* size (0 = byte, 1 = short, 2 = long) */
1691 16, /* bitsize */
1692 TRUE, /* pc_relative */
1693 0, /* bitpos */
1694 complain_overflow_dont,/* complain_on_overflow */
1695 bfd_elf_generic_reloc, /* special_function */
1696 "R_PPC_REL16_LO", /* name */
1697 FALSE, /* partial_inplace */
1698 0, /* src_mask */
1699 0xffff, /* dst_mask */
1700 TRUE), /* pcrel_offset */
1701
1702 /* The high order 16 bits of a relative address. */
1703 HOWTO (R_PPC_REL16_HI, /* type */
1704 16, /* rightshift */
1705 1, /* size (0 = byte, 1 = short, 2 = long) */
1706 16, /* bitsize */
1707 TRUE, /* pc_relative */
1708 0, /* bitpos */
1709 complain_overflow_dont, /* complain_on_overflow */
1710 bfd_elf_generic_reloc, /* special_function */
1711 "R_PPC_REL16_HI", /* name */
1712 FALSE, /* partial_inplace */
1713 0, /* src_mask */
1714 0xffff, /* dst_mask */
1715 TRUE), /* pcrel_offset */
1716
1717 /* The high order 16 bits of a relative address, plus 1 if the contents of
1718 the low 16 bits, treated as a signed number, is negative. */
1719 HOWTO (R_PPC_REL16_HA, /* type */
1720 16, /* rightshift */
1721 1, /* size (0 = byte, 1 = short, 2 = long) */
1722 16, /* bitsize */
1723 TRUE, /* pc_relative */
1724 0, /* bitpos */
1725 complain_overflow_dont, /* complain_on_overflow */
1726 ppc_elf_addr16_ha_reloc, /* special_function */
1727 "R_PPC_REL16_HA", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 TRUE), /* pcrel_offset */
1732
1733 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1734 HOWTO (R_PPC_REL16DX_HA, /* type */
1735 16, /* rightshift */
1736 2, /* size (0 = byte, 1 = short, 2 = long) */
1737 16, /* bitsize */
1738 TRUE, /* pc_relative */
1739 0, /* bitpos */
1740 complain_overflow_signed, /* complain_on_overflow */
1741 ppc_elf_addr16_ha_reloc, /* special_function */
1742 "R_PPC_REL16DX_HA", /* name */
1743 FALSE, /* partial_inplace */
1744 0, /* src_mask */
1745 0x1fffc1, /* dst_mask */
1746 TRUE), /* pcrel_offset */
1747
1748 /* GNU extension to record C++ vtable hierarchy. */
1749 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1750 0, /* rightshift */
1751 0, /* size (0 = byte, 1 = short, 2 = long) */
1752 0, /* bitsize */
1753 FALSE, /* pc_relative */
1754 0, /* bitpos */
1755 complain_overflow_dont, /* complain_on_overflow */
1756 NULL, /* special_function */
1757 "R_PPC_GNU_VTINHERIT", /* name */
1758 FALSE, /* partial_inplace */
1759 0, /* src_mask */
1760 0, /* dst_mask */
1761 FALSE), /* pcrel_offset */
1762
1763 /* GNU extension to record C++ vtable member usage. */
1764 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1765 0, /* rightshift */
1766 0, /* size (0 = byte, 1 = short, 2 = long) */
1767 0, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_dont, /* complain_on_overflow */
1771 NULL, /* special_function */
1772 "R_PPC_GNU_VTENTRY", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Phony reloc to handle AIX style TOC entries. */
1779 HOWTO (R_PPC_TOC16, /* type */
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_signed, /* complain_on_overflow */
1786 ppc_elf_unhandled_reloc, /* special_function */
1787 "R_PPC_TOC16", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792 };
1793
1794 /* External 32-bit PPC structure for PRPSINFO. This structure is
1795 ABI-defined, thus we choose to use char arrays here in order to
1796 avoid dealing with different types in different architectures.
1797
1798 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1799 most non-PPC architectures use `short int'.
1800
1801 This structure will ultimately be written in the corefile's note
1802 section, as the PRPSINFO. */
1803
1804 struct elf_external_ppc_linux_prpsinfo32
1805 {
1806 char pr_state; /* Numeric process state. */
1807 char pr_sname; /* Char for pr_state. */
1808 char pr_zomb; /* Zombie. */
1809 char pr_nice; /* Nice val. */
1810 char pr_flag[4]; /* Flags. */
1811 char pr_uid[4];
1812 char pr_gid[4];
1813 char pr_pid[4];
1814 char pr_ppid[4];
1815 char pr_pgrp[4];
1816 char pr_sid[4];
1817 char pr_fname[16]; /* Filename of executable. */
1818 char pr_psargs[80]; /* Initial part of arg list. */
1819 };
1820
1821 /* Helper function to copy an elf_internal_linux_prpsinfo in host
1822 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */
1823
1824 static inline void
1825 swap_ppc_linux_prpsinfo32_out (bfd *obfd,
1826 const struct elf_internal_linux_prpsinfo *from,
1827 struct elf_external_ppc_linux_prpsinfo32 *to)
1828 {
1829 bfd_put_8 (obfd, from->pr_state, &to->pr_state);
1830 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname);
1831 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb);
1832 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice);
1833 bfd_put_32 (obfd, from->pr_flag, to->pr_flag);
1834 bfd_put_32 (obfd, from->pr_uid, to->pr_uid);
1835 bfd_put_32 (obfd, from->pr_gid, to->pr_gid);
1836 bfd_put_32 (obfd, from->pr_pid, to->pr_pid);
1837 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid);
1838 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp);
1839 bfd_put_32 (obfd, from->pr_sid, to->pr_sid);
1840 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname));
1841 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs));
1842 }
1843 \f
1844 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1845
1846 static void
1847 ppc_elf_howto_init (void)
1848 {
1849 unsigned int i, type;
1850
1851 for (i = 0;
1852 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1853 i++)
1854 {
1855 type = ppc_elf_howto_raw[i].type;
1856 if (type >= (sizeof (ppc_elf_howto_table)
1857 / sizeof (ppc_elf_howto_table[0])))
1858 abort ();
1859 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1860 }
1861 }
1862
1863 static reloc_howto_type *
1864 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1865 bfd_reloc_code_real_type code)
1866 {
1867 enum elf_ppc_reloc_type r;
1868
1869 /* Initialize howto table if not already done. */
1870 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1871 ppc_elf_howto_init ();
1872
1873 switch (code)
1874 {
1875 default:
1876 return NULL;
1877
1878 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1879 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1880 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1881 case BFD_RELOC_PPC64_ADDR16_DS:
1882 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1883 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1884 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1885 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1886 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1887 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1888 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1889 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1890 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1891 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1892 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1893 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1894 case BFD_RELOC_PPC64_GOT16_DS:
1895 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1896 case BFD_RELOC_PPC64_GOT16_LO_DS:
1897 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1898 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1899 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1900 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1901 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1902 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1903 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1904 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1905 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1906 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1907 case BFD_RELOC_PPC64_PLT16_LO_DS:
1908 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1909 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1910 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1911 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1912 case BFD_RELOC_PPC64_SECTOFF_DS:
1913 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1914 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1915 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1916 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1917 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1918 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1919 case BFD_RELOC_PPC64_TOC16_DS:
1920 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1921 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1922 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1923 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1924 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1925 case BFD_RELOC_PPC64_TPREL16_DS:
1926 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1927 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1928 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1929 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1930 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1931 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1932 case BFD_RELOC_PPC64_DTPREL16_DS:
1933 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1934 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1935 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1936 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1937 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1938 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1939 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1940 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1941 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1942 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1943 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1944 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1945 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1946 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1947 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1948 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1949 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1950 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1951 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1952 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1953 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1954 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1955 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1956 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1957 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1958 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1959 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1960 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1961 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1962 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1963 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1964 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1965 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1966 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1967 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1968 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1969 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1970 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1971 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1972 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1973 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1974 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1975 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1976 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1977 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1978 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1979 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1980 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1981 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1982 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1983 r = R_PPC_VLE_SDAREL_LO16A;
1984 break;
1985 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1986 r = R_PPC_VLE_SDAREL_LO16D;
1987 break;
1988 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1989 r = R_PPC_VLE_SDAREL_HI16A;
1990 break;
1991 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1992 r = R_PPC_VLE_SDAREL_HI16D;
1993 break;
1994 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1995 r = R_PPC_VLE_SDAREL_HA16A;
1996 break;
1997 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1998 r = R_PPC_VLE_SDAREL_HA16D;
1999 break;
2000 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2001 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2002 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2003 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2004 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2005 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2006 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2007 }
2008
2009 return ppc_elf_howto_table[r];
2010 };
2011
2012 static reloc_howto_type *
2013 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2014 const char *r_name)
2015 {
2016 unsigned int i;
2017
2018 for (i = 0;
2019 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2020 i++)
2021 if (ppc_elf_howto_raw[i].name != NULL
2022 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2023 return &ppc_elf_howto_raw[i];
2024
2025 return NULL;
2026 }
2027
2028 /* Set the howto pointer for a PowerPC ELF reloc. */
2029
2030 static void
2031 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2032 arelent *cache_ptr,
2033 Elf_Internal_Rela *dst)
2034 {
2035 unsigned int r_type;
2036
2037 /* Initialize howto table if not already done. */
2038 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2039 ppc_elf_howto_init ();
2040
2041 r_type = ELF32_R_TYPE (dst->r_info);
2042 if (r_type >= R_PPC_max)
2043 {
2044 (*_bfd_error_handler) (_("%B: unrecognised PPC reloc number: %d"),
2045 abfd, r_type);
2046 bfd_set_error (bfd_error_bad_value);
2047 r_type = R_PPC_NONE;
2048 }
2049 cache_ptr->howto = ppc_elf_howto_table[r_type];
2050
2051 /* Just because the above assert didn't trigger doesn't mean that
2052 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2053 if (!cache_ptr->howto)
2054 {
2055 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2056 abfd, r_type);
2057 bfd_set_error (bfd_error_bad_value);
2058
2059 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2060 }
2061 }
2062
2063 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2064
2065 static bfd_reloc_status_type
2066 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2067 arelent *reloc_entry,
2068 asymbol *symbol,
2069 void *data ATTRIBUTE_UNUSED,
2070 asection *input_section,
2071 bfd *output_bfd,
2072 char **error_message ATTRIBUTE_UNUSED)
2073 {
2074 enum elf_ppc_reloc_type r_type;
2075 long insn;
2076 bfd_size_type octets;
2077 bfd_vma value;
2078
2079 if (output_bfd != NULL)
2080 {
2081 reloc_entry->address += input_section->output_offset;
2082 return bfd_reloc_ok;
2083 }
2084
2085 reloc_entry->addend += 0x8000;
2086 r_type = reloc_entry->howto->type;
2087 if (r_type != R_PPC_REL16DX_HA)
2088 return bfd_reloc_continue;
2089
2090 value = 0;
2091 if (!bfd_is_com_section (symbol->section))
2092 value = symbol->value;
2093 value += (reloc_entry->addend
2094 + symbol->section->output_offset
2095 + symbol->section->output_section->vma);
2096 value -= (reloc_entry->address
2097 + input_section->output_offset
2098 + input_section->output_section->vma);
2099 value >>= 16;
2100
2101 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2102 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2103 insn &= ~0x1fffc1;
2104 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2105 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2106 return bfd_reloc_ok;
2107 }
2108
2109 static bfd_reloc_status_type
2110 ppc_elf_unhandled_reloc (bfd *abfd,
2111 arelent *reloc_entry,
2112 asymbol *symbol,
2113 void *data,
2114 asection *input_section,
2115 bfd *output_bfd,
2116 char **error_message)
2117 {
2118 /* If this is a relocatable link (output_bfd test tells us), just
2119 call the generic function. Any adjustment will be done at final
2120 link time. */
2121 if (output_bfd != NULL)
2122 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2123 input_section, output_bfd, error_message);
2124
2125 if (error_message != NULL)
2126 {
2127 static char buf[60];
2128 sprintf (buf, _("generic linker can't handle %s"),
2129 reloc_entry->howto->name);
2130 *error_message = buf;
2131 }
2132 return bfd_reloc_dangerous;
2133 }
2134 \f
2135 /* Sections created by the linker. */
2136
2137 typedef struct elf_linker_section
2138 {
2139 /* Pointer to the bfd section. */
2140 asection *section;
2141 /* Section name. */
2142 const char *name;
2143 /* Associated bss section name. */
2144 const char *bss_name;
2145 /* Associated symbol name. */
2146 const char *sym_name;
2147 /* Associated symbol. */
2148 struct elf_link_hash_entry *sym;
2149 } elf_linker_section_t;
2150
2151 /* Linked list of allocated pointer entries. This hangs off of the
2152 symbol lists, and provides allows us to return different pointers,
2153 based on different addend's. */
2154
2155 typedef struct elf_linker_section_pointers
2156 {
2157 /* next allocated pointer for this symbol */
2158 struct elf_linker_section_pointers *next;
2159 /* offset of pointer from beginning of section */
2160 bfd_vma offset;
2161 /* addend used */
2162 bfd_vma addend;
2163 /* which linker section this is */
2164 elf_linker_section_t *lsect;
2165 } elf_linker_section_pointers_t;
2166
2167 struct ppc_elf_obj_tdata
2168 {
2169 struct elf_obj_tdata elf;
2170
2171 /* A mapping from local symbols to offsets into the various linker
2172 sections added. This is index by the symbol index. */
2173 elf_linker_section_pointers_t **linker_section_pointers;
2174
2175 /* Flags used to auto-detect plt type. */
2176 unsigned int makes_plt_call : 1;
2177 unsigned int has_rel16 : 1;
2178 };
2179
2180 #define ppc_elf_tdata(bfd) \
2181 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2182
2183 #define elf_local_ptr_offsets(bfd) \
2184 (ppc_elf_tdata (bfd)->linker_section_pointers)
2185
2186 #define is_ppc_elf(bfd) \
2187 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2188 && elf_object_id (bfd) == PPC32_ELF_DATA)
2189
2190 /* Override the generic function because we store some extras. */
2191
2192 static bfd_boolean
2193 ppc_elf_mkobject (bfd *abfd)
2194 {
2195 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2196 PPC32_ELF_DATA);
2197 }
2198
2199 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2200
2201 bfd_boolean
2202 _bfd_elf_ppc_set_arch (bfd *abfd)
2203 {
2204 unsigned long mach = 0;
2205 asection *s;
2206 unsigned char *contents;
2207
2208 if (abfd->arch_info->bits_per_word == 32
2209 && bfd_big_endian (abfd))
2210 {
2211
2212 for (s = abfd->sections; s != NULL; s = s->next)
2213 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2214 break;
2215 if (s != NULL)
2216 mach = bfd_mach_ppc_vle;
2217 }
2218
2219 if (mach == 0)
2220 {
2221 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2222 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2223 {
2224 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2225 unsigned int i;
2226
2227 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2228 {
2229 unsigned int val = bfd_get_32 (abfd, contents + i);
2230 switch (val >> 16)
2231 {
2232 case PPC_APUINFO_PMR:
2233 case PPC_APUINFO_RFMCI:
2234 if (mach == 0)
2235 mach = bfd_mach_ppc_titan;
2236 break;
2237
2238 case PPC_APUINFO_ISEL:
2239 case PPC_APUINFO_CACHELCK:
2240 if (mach == bfd_mach_ppc_titan)
2241 mach = bfd_mach_ppc_e500mc;
2242 break;
2243
2244 case PPC_APUINFO_SPE:
2245 case PPC_APUINFO_EFS:
2246 case PPC_APUINFO_BRLOCK:
2247 if (mach != bfd_mach_ppc_vle)
2248 mach = bfd_mach_ppc_e500;
2249
2250 case PPC_APUINFO_VLE:
2251 mach = bfd_mach_ppc_vle;
2252 break;
2253
2254 default:
2255 mach = -1ul;
2256 }
2257 }
2258 free (contents);
2259 }
2260 }
2261
2262 if (mach != 0 && mach != -1ul)
2263 {
2264 const bfd_arch_info_type *arch;
2265
2266 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2267 if (arch->mach == mach)
2268 {
2269 abfd->arch_info = arch;
2270 break;
2271 }
2272 }
2273 return TRUE;
2274 }
2275
2276 /* Fix bad default arch selected for a 32 bit input bfd when the
2277 default is 64 bit. Also select arch based on apuinfo. */
2278
2279 static bfd_boolean
2280 ppc_elf_object_p (bfd *abfd)
2281 {
2282 if (!abfd->arch_info->the_default)
2283 return TRUE;
2284
2285 if (abfd->arch_info->bits_per_word == 64)
2286 {
2287 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2288
2289 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2290 {
2291 /* Relies on arch after 64 bit default being 32 bit default. */
2292 abfd->arch_info = abfd->arch_info->next;
2293 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2294 }
2295 }
2296 return _bfd_elf_ppc_set_arch (abfd);
2297 }
2298
2299 /* Function to set whether a module needs the -mrelocatable bit set. */
2300
2301 static bfd_boolean
2302 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2303 {
2304 BFD_ASSERT (!elf_flags_init (abfd)
2305 || elf_elfheader (abfd)->e_flags == flags);
2306
2307 elf_elfheader (abfd)->e_flags = flags;
2308 elf_flags_init (abfd) = TRUE;
2309 return TRUE;
2310 }
2311
2312 /* Support for core dump NOTE sections. */
2313
2314 static bfd_boolean
2315 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2316 {
2317 int offset;
2318 unsigned int size;
2319
2320 switch (note->descsz)
2321 {
2322 default:
2323 return FALSE;
2324
2325 case 268: /* Linux/PPC. */
2326 /* pr_cursig */
2327 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2328
2329 /* pr_pid */
2330 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2331
2332 /* pr_reg */
2333 offset = 72;
2334 size = 192;
2335
2336 break;
2337 }
2338
2339 /* Make a ".reg/999" section. */
2340 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2341 size, note->descpos + offset);
2342 }
2343
2344 static bfd_boolean
2345 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2346 {
2347 switch (note->descsz)
2348 {
2349 default:
2350 return FALSE;
2351
2352 case 128: /* Linux/PPC elf_prpsinfo. */
2353 elf_tdata (abfd)->core->pid
2354 = bfd_get_32 (abfd, note->descdata + 16);
2355 elf_tdata (abfd)->core->program
2356 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2357 elf_tdata (abfd)->core->command
2358 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2359 }
2360
2361 /* Note that for some reason, a spurious space is tacked
2362 onto the end of the args in some (at least one anyway)
2363 implementations, so strip it off if it exists. */
2364
2365 {
2366 char *command = elf_tdata (abfd)->core->command;
2367 int n = strlen (command);
2368
2369 if (0 < n && command[n - 1] == ' ')
2370 command[n - 1] = '\0';
2371 }
2372
2373 return TRUE;
2374 }
2375
2376 char *
2377 elfcore_write_ppc_linux_prpsinfo32
2378 (bfd *abfd,
2379 char *buf,
2380 int *bufsiz,
2381 const struct elf_internal_linux_prpsinfo *prpsinfo)
2382 {
2383 struct elf_external_ppc_linux_prpsinfo32 data;
2384
2385 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data);
2386 return elfcore_write_note (abfd, buf, bufsiz,
2387 "CORE", NT_PRPSINFO, &data, sizeof (data));
2388 }
2389
2390 static char *
2391 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2392 {
2393 switch (note_type)
2394 {
2395 default:
2396 return NULL;
2397
2398 case NT_PRPSINFO:
2399 {
2400 char data[128];
2401 va_list ap;
2402
2403 va_start (ap, note_type);
2404 memset (data, 0, sizeof (data));
2405 strncpy (data + 32, va_arg (ap, const char *), 16);
2406 strncpy (data + 48, va_arg (ap, const char *), 80);
2407 va_end (ap);
2408 return elfcore_write_note (abfd, buf, bufsiz,
2409 "CORE", note_type, data, sizeof (data));
2410 }
2411
2412 case NT_PRSTATUS:
2413 {
2414 char data[268];
2415 va_list ap;
2416 long pid;
2417 int cursig;
2418 const void *greg;
2419
2420 va_start (ap, note_type);
2421 memset (data, 0, 72);
2422 pid = va_arg (ap, long);
2423 bfd_put_32 (abfd, pid, data + 24);
2424 cursig = va_arg (ap, int);
2425 bfd_put_16 (abfd, cursig, data + 12);
2426 greg = va_arg (ap, const void *);
2427 memcpy (data + 72, greg, 192);
2428 memset (data + 264, 0, 4);
2429 va_end (ap);
2430 return elfcore_write_note (abfd, buf, bufsiz,
2431 "CORE", note_type, data, sizeof (data));
2432 }
2433 }
2434 }
2435
2436 static flagword
2437 ppc_elf_lookup_section_flags (char *flag_name)
2438 {
2439
2440 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2441 return SHF_PPC_VLE;
2442
2443 return 0;
2444 }
2445
2446 /* Add the VLE flag if required. */
2447
2448 bfd_boolean
2449 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2450 {
2451 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2452 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2453 shdr->sh_flags |= SHF_PPC_VLE;
2454
2455 return TRUE;
2456 }
2457
2458 /* Return address for Ith PLT stub in section PLT, for relocation REL
2459 or (bfd_vma) -1 if it should not be included. */
2460
2461 static bfd_vma
2462 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2463 const asection *plt ATTRIBUTE_UNUSED,
2464 const arelent *rel)
2465 {
2466 return rel->address;
2467 }
2468
2469 /* Handle a PowerPC specific section when reading an object file. This
2470 is called when bfd_section_from_shdr finds a section with an unknown
2471 type. */
2472
2473 static bfd_boolean
2474 ppc_elf_section_from_shdr (bfd *abfd,
2475 Elf_Internal_Shdr *hdr,
2476 const char *name,
2477 int shindex)
2478 {
2479 asection *newsect;
2480 flagword flags;
2481
2482 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2483 return FALSE;
2484
2485 newsect = hdr->bfd_section;
2486 flags = bfd_get_section_flags (abfd, newsect);
2487 if (hdr->sh_flags & SHF_EXCLUDE)
2488 flags |= SEC_EXCLUDE;
2489
2490 if (hdr->sh_type == SHT_ORDERED)
2491 flags |= SEC_SORT_ENTRIES;
2492
2493 bfd_set_section_flags (abfd, newsect, flags);
2494 return TRUE;
2495 }
2496
2497 /* Set up any other section flags and such that may be necessary. */
2498
2499 static bfd_boolean
2500 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2501 Elf_Internal_Shdr *shdr,
2502 asection *asect)
2503 {
2504 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2505 shdr->sh_type = SHT_ORDERED;
2506
2507 return TRUE;
2508 }
2509
2510 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2511 need to bump up the number of section headers. */
2512
2513 static int
2514 ppc_elf_additional_program_headers (bfd *abfd,
2515 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2516 {
2517 asection *s;
2518 int ret = 0;
2519
2520 s = bfd_get_section_by_name (abfd, ".sbss2");
2521 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2522 ++ret;
2523
2524 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2525 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2526 ++ret;
2527
2528 return ret;
2529 }
2530
2531 /* Modify the segment map for VLE executables. */
2532
2533 bfd_boolean
2534 ppc_elf_modify_segment_map (bfd *abfd,
2535 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2536 {
2537 struct elf_segment_map *m, *n;
2538 bfd_size_type amt;
2539 unsigned int j, k;
2540 bfd_boolean sect0_vle, sectj_vle;
2541
2542 /* At this point in the link, output sections have already been sorted by
2543 LMA and assigned to segments. All that is left to do is to ensure
2544 there is no mixing of VLE & non-VLE sections in a text segment.
2545 If we find that case, we split the segment.
2546 We maintain the original output section order. */
2547
2548 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2549 {
2550 if (m->count == 0)
2551 continue;
2552
2553 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2554 for (j = 1; j < m->count; ++j)
2555 {
2556 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2557
2558 if (sectj_vle != sect0_vle)
2559 break;
2560 }
2561 if (j >= m->count)
2562 continue;
2563
2564 /* sections 0..j-1 stay in this (current) segment,
2565 the remainder are put in a new segment.
2566 The scan resumes with the new segment. */
2567
2568 /* Fix the new segment. */
2569 amt = sizeof (struct elf_segment_map);
2570 amt += (m->count - j - 1) * sizeof (asection *);
2571 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2572 if (n == NULL)
2573 return FALSE;
2574
2575 n->p_type = PT_LOAD;
2576 n->p_flags = PF_X | PF_R;
2577 if (sectj_vle)
2578 n->p_flags |= PF_PPC_VLE;
2579 n->count = m->count - j;
2580 for (k = 0; k < n->count; ++k)
2581 {
2582 n->sections[k] = m->sections[j+k];
2583 m->sections[j+k] = NULL;
2584 }
2585 n->next = m->next;
2586 m->next = n;
2587
2588 /* Fix the current segment */
2589 m->count = j;
2590 }
2591
2592 return TRUE;
2593 }
2594
2595 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2596 .PPC.EMB.sbss0 a normal section, and not a bss section so
2597 that the linker doesn't crater when trying to make more than
2598 2 sections. */
2599
2600 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2601 {
2602 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2603 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2604 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2605 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2606 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2607 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2608 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2609 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2610 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2611 { NULL, 0, 0, 0, 0 }
2612 };
2613
2614 /* This is what we want for new plt/got. */
2615 static struct bfd_elf_special_section ppc_alt_plt =
2616 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2617
2618 static const struct bfd_elf_special_section *
2619 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2620 {
2621 const struct bfd_elf_special_section *ssect;
2622
2623 /* See if this is one of the special sections. */
2624 if (sec->name == NULL)
2625 return NULL;
2626
2627 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2628 sec->use_rela_p);
2629 if (ssect != NULL)
2630 {
2631 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2632 ssect = &ppc_alt_plt;
2633 return ssect;
2634 }
2635
2636 return _bfd_elf_get_sec_type_attr (abfd, sec);
2637 }
2638 \f
2639 /* Very simple linked list structure for recording apuinfo values. */
2640 typedef struct apuinfo_list
2641 {
2642 struct apuinfo_list *next;
2643 unsigned long value;
2644 }
2645 apuinfo_list;
2646
2647 static apuinfo_list *head;
2648 static bfd_boolean apuinfo_set;
2649
2650 static void
2651 apuinfo_list_init (void)
2652 {
2653 head = NULL;
2654 apuinfo_set = FALSE;
2655 }
2656
2657 static void
2658 apuinfo_list_add (unsigned long value)
2659 {
2660 apuinfo_list *entry = head;
2661
2662 while (entry != NULL)
2663 {
2664 if (entry->value == value)
2665 return;
2666 entry = entry->next;
2667 }
2668
2669 entry = bfd_malloc (sizeof (* entry));
2670 if (entry == NULL)
2671 return;
2672
2673 entry->value = value;
2674 entry->next = head;
2675 head = entry;
2676 }
2677
2678 static unsigned
2679 apuinfo_list_length (void)
2680 {
2681 apuinfo_list *entry;
2682 unsigned long count;
2683
2684 for (entry = head, count = 0;
2685 entry;
2686 entry = entry->next)
2687 ++ count;
2688
2689 return count;
2690 }
2691
2692 static inline unsigned long
2693 apuinfo_list_element (unsigned long number)
2694 {
2695 apuinfo_list * entry;
2696
2697 for (entry = head;
2698 entry && number --;
2699 entry = entry->next)
2700 ;
2701
2702 return entry ? entry->value : 0;
2703 }
2704
2705 static void
2706 apuinfo_list_finish (void)
2707 {
2708 apuinfo_list *entry;
2709
2710 for (entry = head; entry;)
2711 {
2712 apuinfo_list *next = entry->next;
2713 free (entry);
2714 entry = next;
2715 }
2716
2717 head = NULL;
2718 }
2719
2720 /* Scan the input BFDs and create a linked list of
2721 the APUinfo values that will need to be emitted. */
2722
2723 static void
2724 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2725 {
2726 bfd *ibfd;
2727 asection *asec;
2728 char *buffer = NULL;
2729 bfd_size_type largest_input_size = 0;
2730 unsigned i;
2731 unsigned long length;
2732 const char *error_message = NULL;
2733
2734 if (link_info == NULL)
2735 return;
2736
2737 apuinfo_list_init ();
2738
2739 /* Read in the input sections contents. */
2740 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2741 {
2742 unsigned long datum;
2743
2744 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2745 if (asec == NULL)
2746 continue;
2747
2748 error_message = _("corrupt %s section in %B");
2749 length = asec->size;
2750 if (length < 20)
2751 goto fail;
2752
2753 apuinfo_set = TRUE;
2754 if (largest_input_size < asec->size)
2755 {
2756 if (buffer)
2757 free (buffer);
2758 largest_input_size = asec->size;
2759 buffer = bfd_malloc (largest_input_size);
2760 if (!buffer)
2761 return;
2762 }
2763
2764 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2765 || (bfd_bread (buffer, length, ibfd) != length))
2766 {
2767 error_message = _("unable to read in %s section from %B");
2768 goto fail;
2769 }
2770
2771 /* Verify the contents of the header. Note - we have to
2772 extract the values this way in order to allow for a
2773 host whose endian-ness is different from the target. */
2774 datum = bfd_get_32 (ibfd, buffer);
2775 if (datum != sizeof APUINFO_LABEL)
2776 goto fail;
2777
2778 datum = bfd_get_32 (ibfd, buffer + 8);
2779 if (datum != 0x2)
2780 goto fail;
2781
2782 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2783 goto fail;
2784
2785 /* Get the number of bytes used for apuinfo entries. */
2786 datum = bfd_get_32 (ibfd, buffer + 4);
2787 if (datum + 20 != length)
2788 goto fail;
2789
2790 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2791 for (i = 0; i < datum; i += 4)
2792 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2793 }
2794
2795 error_message = NULL;
2796
2797 if (apuinfo_set)
2798 {
2799 /* Compute the size of the output section. */
2800 unsigned num_entries = apuinfo_list_length ();
2801
2802 /* Set the output section size, if it exists. */
2803 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2804
2805 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2806 {
2807 ibfd = abfd;
2808 error_message = _("warning: unable to set size of %s section in %B");
2809 }
2810 }
2811
2812 fail:
2813 if (buffer)
2814 free (buffer);
2815
2816 if (error_message)
2817 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2818 }
2819
2820 /* Prevent the output section from accumulating the input sections'
2821 contents. We have already stored this in our linked list structure. */
2822
2823 static bfd_boolean
2824 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2825 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2826 asection *asec,
2827 bfd_byte *contents ATTRIBUTE_UNUSED)
2828 {
2829 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2830 }
2831
2832 /* Finally we can generate the output section. */
2833
2834 static void
2835 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2836 {
2837 bfd_byte *buffer;
2838 asection *asec;
2839 unsigned i;
2840 unsigned num_entries;
2841 bfd_size_type length;
2842
2843 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2844 if (asec == NULL)
2845 return;
2846
2847 if (!apuinfo_set)
2848 return;
2849
2850 length = asec->size;
2851 if (length < 20)
2852 return;
2853
2854 buffer = bfd_malloc (length);
2855 if (buffer == NULL)
2856 {
2857 (*_bfd_error_handler)
2858 (_("failed to allocate space for new APUinfo section."));
2859 return;
2860 }
2861
2862 /* Create the apuinfo header. */
2863 num_entries = apuinfo_list_length ();
2864 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2865 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2866 bfd_put_32 (abfd, 0x2, buffer + 8);
2867 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2868
2869 length = 20;
2870 for (i = 0; i < num_entries; i++)
2871 {
2872 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2873 length += 4;
2874 }
2875
2876 if (length != asec->size)
2877 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2878
2879 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2880 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2881
2882 free (buffer);
2883
2884 apuinfo_list_finish ();
2885 }
2886 \f
2887 static bfd_boolean
2888 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2889 {
2890 bfd_byte buf[GLINK_ENTRY_SIZE];
2891
2892 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2893 return FALSE;
2894
2895 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2896 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2897 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2898 && bfd_get_32 (abfd, buf + 12) == BCTR);
2899 }
2900
2901 static bfd_boolean
2902 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2903 {
2904 bfd_vma vma = *(bfd_vma *) ptr;
2905 return ((section->flags & SEC_ALLOC) != 0
2906 && section->vma <= vma
2907 && vma < section->vma + section->size);
2908 }
2909
2910 static long
2911 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2912 long dynsymcount, asymbol **dynsyms,
2913 asymbol **ret)
2914 {
2915 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2916 asection *plt, *relplt, *dynamic, *glink;
2917 bfd_vma glink_vma = 0;
2918 bfd_vma resolv_vma = 0;
2919 bfd_vma stub_vma;
2920 asymbol *s;
2921 arelent *p;
2922 long count, i;
2923 size_t size;
2924 char *names;
2925 bfd_byte buf[4];
2926
2927 *ret = NULL;
2928
2929 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2930 return 0;
2931
2932 if (dynsymcount <= 0)
2933 return 0;
2934
2935 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2936 if (relplt == NULL)
2937 return 0;
2938
2939 plt = bfd_get_section_by_name (abfd, ".plt");
2940 if (plt == NULL)
2941 return 0;
2942
2943 /* Call common code to handle old-style executable PLTs. */
2944 if (elf_section_flags (plt) & SHF_EXECINSTR)
2945 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2946 dynsymcount, dynsyms, ret);
2947
2948 /* If this object was prelinked, the prelinker stored the address
2949 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2950 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2951 if (dynamic != NULL)
2952 {
2953 bfd_byte *dynbuf, *extdyn, *extdynend;
2954 size_t extdynsize;
2955 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2956
2957 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2958 return -1;
2959
2960 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2961 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2962
2963 extdyn = dynbuf;
2964 extdynend = extdyn + dynamic->size;
2965 for (; extdyn < extdynend; extdyn += extdynsize)
2966 {
2967 Elf_Internal_Dyn dyn;
2968 (*swap_dyn_in) (abfd, extdyn, &dyn);
2969
2970 if (dyn.d_tag == DT_NULL)
2971 break;
2972
2973 if (dyn.d_tag == DT_PPC_GOT)
2974 {
2975 unsigned int g_o_t = dyn.d_un.d_val;
2976 asection *got = bfd_get_section_by_name (abfd, ".got");
2977 if (got != NULL
2978 && bfd_get_section_contents (abfd, got, buf,
2979 g_o_t - got->vma + 4, 4))
2980 glink_vma = bfd_get_32 (abfd, buf);
2981 break;
2982 }
2983 }
2984 free (dynbuf);
2985 }
2986
2987 /* Otherwise we read the first plt entry. */
2988 if (glink_vma == 0)
2989 {
2990 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2991 glink_vma = bfd_get_32 (abfd, buf);
2992 }
2993
2994 if (glink_vma == 0)
2995 return 0;
2996
2997 /* The .glink section usually does not survive the final
2998 link; search for the section (usually .text) where the
2999 glink stubs now reside. */
3000 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3001 if (glink == NULL)
3002 return 0;
3003
3004 /* Determine glink PLT resolver by reading the relative branch
3005 from the first glink stub. */
3006 if (bfd_get_section_contents (abfd, glink, buf,
3007 glink_vma - glink->vma, 4))
3008 {
3009 unsigned int insn = bfd_get_32 (abfd, buf);
3010
3011 /* The first glink stub may either branch to the resolver ... */
3012 insn ^= B;
3013 if ((insn & ~0x3fffffc) == 0)
3014 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3015
3016 /* ... or fall through a bunch of NOPs. */
3017 else if ((insn ^ B ^ NOP) == 0)
3018 for (i = 4;
3019 bfd_get_section_contents (abfd, glink, buf,
3020 glink_vma - glink->vma + i, 4);
3021 i += 4)
3022 if (bfd_get_32 (abfd, buf) != NOP)
3023 {
3024 resolv_vma = glink_vma + i;
3025 break;
3026 }
3027 }
3028
3029 count = relplt->size / sizeof (Elf32_External_Rela);
3030 /* If the stubs are those for -shared/-pie then we might have
3031 multiple stubs for each plt entry. If that is the case then
3032 there is no way to associate stubs with their plt entries short
3033 of figuring out the GOT pointer value used in the stub. */
3034 if (!is_nonpic_glink_stub (abfd, glink,
3035 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3036 return 0;
3037
3038 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3039 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3040 return -1;
3041
3042 size = count * sizeof (asymbol);
3043 p = relplt->relocation;
3044 for (i = 0; i < count; i++, p++)
3045 {
3046 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3047 if (p->addend != 0)
3048 size += sizeof ("+0x") - 1 + 8;
3049 }
3050
3051 size += sizeof (asymbol) + sizeof ("__glink");
3052
3053 if (resolv_vma)
3054 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3055
3056 s = *ret = bfd_malloc (size);
3057 if (s == NULL)
3058 return -1;
3059
3060 stub_vma = glink_vma;
3061 names = (char *) (s + count + 1 + (resolv_vma != 0));
3062 p = relplt->relocation + count - 1;
3063 for (i = 0; i < count; i++)
3064 {
3065 size_t len;
3066
3067 *s = **p->sym_ptr_ptr;
3068 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3069 we are defining a symbol, ensure one of them is set. */
3070 if ((s->flags & BSF_LOCAL) == 0)
3071 s->flags |= BSF_GLOBAL;
3072 s->flags |= BSF_SYNTHETIC;
3073 s->section = glink;
3074 stub_vma -= 16;
3075 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3076 stub_vma -= 32;
3077 s->value = stub_vma - glink->vma;
3078 s->name = names;
3079 s->udata.p = NULL;
3080 len = strlen ((*p->sym_ptr_ptr)->name);
3081 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3082 names += len;
3083 if (p->addend != 0)
3084 {
3085 memcpy (names, "+0x", sizeof ("+0x") - 1);
3086 names += sizeof ("+0x") - 1;
3087 bfd_sprintf_vma (abfd, names, p->addend);
3088 names += strlen (names);
3089 }
3090 memcpy (names, "@plt", sizeof ("@plt"));
3091 names += sizeof ("@plt");
3092 ++s;
3093 --p;
3094 }
3095
3096 /* Add a symbol at the start of the glink branch table. */
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 = glink_vma - glink->vma;
3102 s->name = names;
3103 memcpy (names, "__glink", sizeof ("__glink"));
3104 names += sizeof ("__glink");
3105 s++;
3106 count++;
3107
3108 if (resolv_vma)
3109 {
3110 /* Add a symbol for the glink PLT resolver. */
3111 memset (s, 0, sizeof *s);
3112 s->the_bfd = abfd;
3113 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3114 s->section = glink;
3115 s->value = resolv_vma - glink->vma;
3116 s->name = names;
3117 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3118 names += sizeof ("__glink_PLTresolve");
3119 s++;
3120 count++;
3121 }
3122
3123 return count;
3124 }
3125 \f
3126 /* The following functions are specific to the ELF linker, while
3127 functions above are used generally. They appear in this file more
3128 or less in the order in which they are called. eg.
3129 ppc_elf_check_relocs is called early in the link process,
3130 ppc_elf_finish_dynamic_sections is one of the last functions
3131 called. */
3132
3133 /* Track PLT entries needed for a given symbol. We might need more
3134 than one glink entry per symbol when generating a pic binary. */
3135 struct plt_entry
3136 {
3137 struct plt_entry *next;
3138
3139 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3140 This field stores the offset into .got2 used to initialise the
3141 GOT pointer reg. It will always be at least 32768. (Current
3142 gcc always uses an offset of 32768, but ld -r will pack .got2
3143 sections together resulting in larger offsets). */
3144 bfd_vma addend;
3145
3146 /* The .got2 section. */
3147 asection *sec;
3148
3149 /* PLT refcount or offset. */
3150 union
3151 {
3152 bfd_signed_vma refcount;
3153 bfd_vma offset;
3154 } plt;
3155
3156 /* .glink stub offset. */
3157 bfd_vma glink_offset;
3158 };
3159
3160 /* Of those relocs that might be copied as dynamic relocs, this function
3161 selects those that must be copied when linking a shared library,
3162 even when the symbol is local. */
3163
3164 static int
3165 must_be_dyn_reloc (struct bfd_link_info *info,
3166 enum elf_ppc_reloc_type r_type)
3167 {
3168 switch (r_type)
3169 {
3170 default:
3171 return 1;
3172
3173 case R_PPC_REL24:
3174 case R_PPC_REL14:
3175 case R_PPC_REL14_BRTAKEN:
3176 case R_PPC_REL14_BRNTAKEN:
3177 case R_PPC_REL32:
3178 return 0;
3179
3180 case R_PPC_TPREL32:
3181 case R_PPC_TPREL16:
3182 case R_PPC_TPREL16_LO:
3183 case R_PPC_TPREL16_HI:
3184 case R_PPC_TPREL16_HA:
3185 return !bfd_link_executable (info);
3186 }
3187 }
3188
3189 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3190 copying dynamic variables from a shared lib into an app's dynbss
3191 section, and instead use a dynamic relocation to point into the
3192 shared lib. */
3193 #define ELIMINATE_COPY_RELOCS 1
3194
3195 /* Used to track dynamic relocations for local symbols. */
3196 struct ppc_dyn_relocs
3197 {
3198 struct ppc_dyn_relocs *next;
3199
3200 /* The input section of the reloc. */
3201 asection *sec;
3202
3203 /* Total number of relocs copied for the input section. */
3204 unsigned int count : 31;
3205
3206 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3207 unsigned int ifunc : 1;
3208 };
3209
3210 /* PPC ELF linker hash entry. */
3211
3212 struct ppc_elf_link_hash_entry
3213 {
3214 struct elf_link_hash_entry elf;
3215
3216 /* If this symbol is used in the linker created sections, the processor
3217 specific backend uses this field to map the field into the offset
3218 from the beginning of the section. */
3219 elf_linker_section_pointers_t *linker_section_pointer;
3220
3221 /* Track dynamic relocs copied for this symbol. */
3222 struct elf_dyn_relocs *dyn_relocs;
3223
3224 /* Contexts in which symbol is used in the GOT (or TOC).
3225 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3226 corresponding relocs are encountered during check_relocs.
3227 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3228 indicate the corresponding GOT entry type is not needed. */
3229 #define TLS_GD 1 /* GD reloc. */
3230 #define TLS_LD 2 /* LD reloc. */
3231 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3232 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3233 #define TLS_TLS 16 /* Any TLS reloc. */
3234 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3235 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3236 char tls_mask;
3237
3238 /* Nonzero if we have seen a small data relocation referring to this
3239 symbol. */
3240 unsigned char has_sda_refs : 1;
3241
3242 /* Flag use of given relocations. */
3243 unsigned char has_addr16_ha : 1;
3244 unsigned char has_addr16_lo : 1;
3245 };
3246
3247 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3248
3249 /* PPC ELF linker hash table. */
3250
3251 struct ppc_elf_link_hash_table
3252 {
3253 struct elf_link_hash_table elf;
3254
3255 /* Various options passed from the linker. */
3256 struct ppc_elf_params *params;
3257
3258 /* Short-cuts to get to dynamic linker sections. */
3259 asection *got;
3260 asection *relgot;
3261 asection *glink;
3262 asection *plt;
3263 asection *relplt;
3264 asection *iplt;
3265 asection *reliplt;
3266 asection *dynbss;
3267 asection *relbss;
3268 asection *dynsbss;
3269 asection *relsbss;
3270 elf_linker_section_t sdata[2];
3271 asection *sbss;
3272 asection *glink_eh_frame;
3273
3274 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3275 asection *srelplt2;
3276
3277 /* The .got.plt section (VxWorks only)*/
3278 asection *sgotplt;
3279
3280 /* Shortcut to __tls_get_addr. */
3281 struct elf_link_hash_entry *tls_get_addr;
3282
3283 /* The bfd that forced an old-style PLT. */
3284 bfd *old_bfd;
3285
3286 /* TLS local dynamic got entry handling. */
3287 union {
3288 bfd_signed_vma refcount;
3289 bfd_vma offset;
3290 } tlsld_got;
3291
3292 /* Offset of branch table to PltResolve function in glink. */
3293 bfd_vma glink_pltresolve;
3294
3295 /* Size of reserved GOT entries. */
3296 unsigned int got_header_size;
3297 /* Non-zero if allocating the header left a gap. */
3298 unsigned int got_gap;
3299
3300 /* The type of PLT we have chosen to use. */
3301 enum ppc_elf_plt_type plt_type;
3302
3303 /* True if the target system is VxWorks. */
3304 unsigned int is_vxworks:1;
3305
3306 /* The size of PLT entries. */
3307 int plt_entry_size;
3308 /* The distance between adjacent PLT slots. */
3309 int plt_slot_size;
3310 /* The size of the first PLT entry. */
3311 int plt_initial_entry_size;
3312
3313 /* Small local sym cache. */
3314 struct sym_cache sym_cache;
3315 };
3316
3317 /* Rename some of the generic section flags to better document how they
3318 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3319
3320 /* Nonzero if this section has TLS related relocations. */
3321 #define has_tls_reloc sec_flg0
3322
3323 /* Nonzero if this section has a call to __tls_get_addr. */
3324 #define has_tls_get_addr_call sec_flg1
3325
3326 /* Get the PPC ELF linker hash table from a link_info structure. */
3327
3328 #define ppc_elf_hash_table(p) \
3329 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3330 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3331
3332 /* Create an entry in a PPC ELF linker hash table. */
3333
3334 static struct bfd_hash_entry *
3335 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3336 struct bfd_hash_table *table,
3337 const char *string)
3338 {
3339 /* Allocate the structure if it has not already been allocated by a
3340 subclass. */
3341 if (entry == NULL)
3342 {
3343 entry = bfd_hash_allocate (table,
3344 sizeof (struct ppc_elf_link_hash_entry));
3345 if (entry == NULL)
3346 return entry;
3347 }
3348
3349 /* Call the allocation method of the superclass. */
3350 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3351 if (entry != NULL)
3352 {
3353 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3354 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3355 ppc_elf_hash_entry (entry)->tls_mask = 0;
3356 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3357 }
3358
3359 return entry;
3360 }
3361
3362 /* Create a PPC ELF linker hash table. */
3363
3364 static struct bfd_link_hash_table *
3365 ppc_elf_link_hash_table_create (bfd *abfd)
3366 {
3367 struct ppc_elf_link_hash_table *ret;
3368 static struct ppc_elf_params default_params
3369 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0 };
3370
3371 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3372 if (ret == NULL)
3373 return NULL;
3374
3375 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3376 ppc_elf_link_hash_newfunc,
3377 sizeof (struct ppc_elf_link_hash_entry),
3378 PPC32_ELF_DATA))
3379 {
3380 free (ret);
3381 return NULL;
3382 }
3383
3384 ret->elf.init_plt_refcount.refcount = 0;
3385 ret->elf.init_plt_refcount.glist = NULL;
3386 ret->elf.init_plt_offset.offset = 0;
3387 ret->elf.init_plt_offset.glist = NULL;
3388
3389 ret->params = &default_params;
3390
3391 ret->sdata[0].name = ".sdata";
3392 ret->sdata[0].sym_name = "_SDA_BASE_";
3393 ret->sdata[0].bss_name = ".sbss";
3394
3395 ret->sdata[1].name = ".sdata2";
3396 ret->sdata[1].sym_name = "_SDA2_BASE_";
3397 ret->sdata[1].bss_name = ".sbss2";
3398
3399 ret->plt_entry_size = 12;
3400 ret->plt_slot_size = 8;
3401 ret->plt_initial_entry_size = 72;
3402
3403 return &ret->elf.root;
3404 }
3405
3406 /* Hook linker params into hash table. */
3407
3408 void
3409 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3410 {
3411 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3412
3413 if (htab)
3414 htab->params = params;
3415 params->pagesize_p2 = bfd_log2 (params->pagesize);
3416 }
3417
3418 /* Create .got and the related sections. */
3419
3420 static bfd_boolean
3421 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3422 {
3423 struct ppc_elf_link_hash_table *htab;
3424 asection *s;
3425 flagword flags;
3426
3427 if (!_bfd_elf_create_got_section (abfd, info))
3428 return FALSE;
3429
3430 htab = ppc_elf_hash_table (info);
3431 htab->got = s = bfd_get_linker_section (abfd, ".got");
3432 if (s == NULL)
3433 abort ();
3434
3435 if (htab->is_vxworks)
3436 {
3437 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3438 if (!htab->sgotplt)
3439 abort ();
3440 }
3441 else
3442 {
3443 /* The powerpc .got has a blrl instruction in it. Mark it
3444 executable. */
3445 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3446 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3447 if (!bfd_set_section_flags (abfd, s, flags))
3448 return FALSE;
3449 }
3450
3451 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3452 if (!htab->relgot)
3453 abort ();
3454
3455 return TRUE;
3456 }
3457
3458 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3459 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3460 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3461
3462 static bfd_boolean
3463 ppc_elf_create_linker_section (bfd *abfd,
3464 struct bfd_link_info *info,
3465 flagword flags,
3466 elf_linker_section_t *lsect)
3467 {
3468 asection *s;
3469
3470 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3471 | SEC_LINKER_CREATED);
3472
3473 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3474 if (s == NULL)
3475 return FALSE;
3476 lsect->section = s;
3477
3478 /* Define the sym on the first section of this name. */
3479 s = bfd_get_section_by_name (abfd, lsect->name);
3480
3481 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3482 if (lsect->sym == NULL)
3483 return FALSE;
3484 lsect->sym->root.u.def.value = 0x8000;
3485 return TRUE;
3486 }
3487
3488 static bfd_boolean
3489 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3490 {
3491 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3492 asection *s;
3493 flagword flags;
3494
3495 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3496 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3497 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3498 htab->glink = s;
3499 if (s == NULL
3500 || !bfd_set_section_alignment (abfd, s,
3501 htab->params->ppc476_workaround ? 6 : 4))
3502 return FALSE;
3503
3504 if (!info->no_ld_generated_unwind_info)
3505 {
3506 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3507 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3508 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3509 htab->glink_eh_frame = s;
3510 if (s == NULL
3511 || !bfd_set_section_alignment (abfd, s, 2))
3512 return FALSE;
3513 }
3514
3515 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3516 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3517 htab->iplt = s;
3518 if (s == NULL
3519 || !bfd_set_section_alignment (abfd, s, 4))
3520 return FALSE;
3521
3522 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3523 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3524 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3525 htab->reliplt = s;
3526 if (s == NULL
3527 || ! bfd_set_section_alignment (abfd, s, 2))
3528 return FALSE;
3529
3530 if (!ppc_elf_create_linker_section (abfd, info, 0,
3531 &htab->sdata[0]))
3532 return FALSE;
3533
3534 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3535 &htab->sdata[1]))
3536 return FALSE;
3537
3538 return TRUE;
3539 }
3540
3541 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3542 to output sections (just like _bfd_elf_create_dynamic_sections has
3543 to create .dynbss and .rela.bss). */
3544
3545 static bfd_boolean
3546 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3547 {
3548 struct ppc_elf_link_hash_table *htab;
3549 asection *s;
3550 flagword flags;
3551
3552 htab = ppc_elf_hash_table (info);
3553
3554 if (htab->got == NULL
3555 && !ppc_elf_create_got (abfd, info))
3556 return FALSE;
3557
3558 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3559 return FALSE;
3560
3561 if (htab->glink == NULL
3562 && !ppc_elf_create_glink (abfd, info))
3563 return FALSE;
3564
3565 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3566 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3567 SEC_ALLOC | SEC_LINKER_CREATED);
3568 htab->dynsbss = s;
3569 if (s == NULL)
3570 return FALSE;
3571
3572 if (! bfd_link_pic (info))
3573 {
3574 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3575 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3576 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3577 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3578 htab->relsbss = s;
3579 if (s == NULL
3580 || ! bfd_set_section_alignment (abfd, s, 2))
3581 return FALSE;
3582 }
3583
3584 if (htab->is_vxworks
3585 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3586 return FALSE;
3587
3588 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3589 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3590 if (s == NULL)
3591 abort ();
3592
3593 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3594 if (htab->plt_type == PLT_VXWORKS)
3595 /* The VxWorks PLT is a loaded section with contents. */
3596 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3597 return bfd_set_section_flags (abfd, s, flags);
3598 }
3599
3600 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3601
3602 static void
3603 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3604 struct elf_link_hash_entry *dir,
3605 struct elf_link_hash_entry *ind)
3606 {
3607 struct ppc_elf_link_hash_entry *edir, *eind;
3608
3609 edir = (struct ppc_elf_link_hash_entry *) dir;
3610 eind = (struct ppc_elf_link_hash_entry *) ind;
3611
3612 edir->tls_mask |= eind->tls_mask;
3613 edir->has_sda_refs |= eind->has_sda_refs;
3614
3615 /* If called to transfer flags for a weakdef during processing
3616 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3617 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3618 if (!(ELIMINATE_COPY_RELOCS
3619 && eind->elf.root.type != bfd_link_hash_indirect
3620 && edir->elf.dynamic_adjusted))
3621 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3622
3623 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3624 edir->elf.ref_regular |= eind->elf.ref_regular;
3625 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3626 edir->elf.needs_plt |= eind->elf.needs_plt;
3627 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3628
3629 if (eind->dyn_relocs != NULL)
3630 {
3631 if (edir->dyn_relocs != NULL)
3632 {
3633 struct elf_dyn_relocs **pp;
3634 struct elf_dyn_relocs *p;
3635
3636 /* Add reloc counts against the indirect sym to the direct sym
3637 list. Merge any entries against the same section. */
3638 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3639 {
3640 struct elf_dyn_relocs *q;
3641
3642 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3643 if (q->sec == p->sec)
3644 {
3645 q->pc_count += p->pc_count;
3646 q->count += p->count;
3647 *pp = p->next;
3648 break;
3649 }
3650 if (q == NULL)
3651 pp = &p->next;
3652 }
3653 *pp = edir->dyn_relocs;
3654 }
3655
3656 edir->dyn_relocs = eind->dyn_relocs;
3657 eind->dyn_relocs = NULL;
3658 }
3659
3660 /* If we were called to copy over info for a weak sym, that's all.
3661 You might think dyn_relocs need not be copied over; After all,
3662 both syms will be dynamic or both non-dynamic so we're just
3663 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3664 code in ppc_elf_adjust_dynamic_symbol needs to check for
3665 dyn_relocs in read-only sections, and it does so on what is the
3666 DIR sym here. */
3667 if (eind->elf.root.type != bfd_link_hash_indirect)
3668 return;
3669
3670 /* Copy over the GOT refcount entries that we may have already seen to
3671 the symbol which just became indirect. */
3672 edir->elf.got.refcount += eind->elf.got.refcount;
3673 eind->elf.got.refcount = 0;
3674
3675 /* And plt entries. */
3676 if (eind->elf.plt.plist != NULL)
3677 {
3678 if (edir->elf.plt.plist != NULL)
3679 {
3680 struct plt_entry **entp;
3681 struct plt_entry *ent;
3682
3683 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3684 {
3685 struct plt_entry *dent;
3686
3687 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3688 if (dent->sec == ent->sec && dent->addend == ent->addend)
3689 {
3690 dent->plt.refcount += ent->plt.refcount;
3691 *entp = ent->next;
3692 break;
3693 }
3694 if (dent == NULL)
3695 entp = &ent->next;
3696 }
3697 *entp = edir->elf.plt.plist;
3698 }
3699
3700 edir->elf.plt.plist = eind->elf.plt.plist;
3701 eind->elf.plt.plist = NULL;
3702 }
3703
3704 if (eind->elf.dynindx != -1)
3705 {
3706 if (edir->elf.dynindx != -1)
3707 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3708 edir->elf.dynstr_index);
3709 edir->elf.dynindx = eind->elf.dynindx;
3710 edir->elf.dynstr_index = eind->elf.dynstr_index;
3711 eind->elf.dynindx = -1;
3712 eind->elf.dynstr_index = 0;
3713 }
3714 }
3715
3716 /* Hook called by the linker routine which adds symbols from an object
3717 file. We use it to put .comm items in .sbss, and not .bss. */
3718
3719 static bfd_boolean
3720 ppc_elf_add_symbol_hook (bfd *abfd,
3721 struct bfd_link_info *info,
3722 Elf_Internal_Sym *sym,
3723 const char **namep ATTRIBUTE_UNUSED,
3724 flagword *flagsp ATTRIBUTE_UNUSED,
3725 asection **secp,
3726 bfd_vma *valp)
3727 {
3728 if (sym->st_shndx == SHN_COMMON
3729 && !bfd_link_relocatable (info)
3730 && is_ppc_elf (info->output_bfd)
3731 && sym->st_size <= elf_gp_size (abfd))
3732 {
3733 /* Common symbols less than or equal to -G nn bytes are automatically
3734 put into .sbss. */
3735 struct ppc_elf_link_hash_table *htab;
3736
3737 htab = ppc_elf_hash_table (info);
3738 if (htab->sbss == NULL)
3739 {
3740 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3741
3742 if (!htab->elf.dynobj)
3743 htab->elf.dynobj = abfd;
3744
3745 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3746 ".sbss",
3747 flags);
3748 if (htab->sbss == NULL)
3749 return FALSE;
3750 }
3751
3752 *secp = htab->sbss;
3753 *valp = sym->st_size;
3754 }
3755
3756 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3757 && (abfd->flags & DYNAMIC) == 0
3758 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3759 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3760
3761 return TRUE;
3762 }
3763 \f
3764 /* Find a linker generated pointer with a given addend and type. */
3765
3766 static elf_linker_section_pointers_t *
3767 elf_find_pointer_linker_section
3768 (elf_linker_section_pointers_t *linker_pointers,
3769 bfd_vma addend,
3770 elf_linker_section_t *lsect)
3771 {
3772 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3773 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3774 return linker_pointers;
3775
3776 return NULL;
3777 }
3778
3779 /* Allocate a pointer to live in a linker created section. */
3780
3781 static bfd_boolean
3782 elf_allocate_pointer_linker_section (bfd *abfd,
3783 elf_linker_section_t *lsect,
3784 struct elf_link_hash_entry *h,
3785 const Elf_Internal_Rela *rel)
3786 {
3787 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3788 elf_linker_section_pointers_t *linker_section_ptr;
3789 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3790 bfd_size_type amt;
3791
3792 BFD_ASSERT (lsect != NULL);
3793
3794 /* Is this a global symbol? */
3795 if (h != NULL)
3796 {
3797 struct ppc_elf_link_hash_entry *eh;
3798
3799 /* Has this symbol already been allocated? If so, our work is done. */
3800 eh = (struct ppc_elf_link_hash_entry *) h;
3801 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3802 rel->r_addend,
3803 lsect))
3804 return TRUE;
3805
3806 ptr_linker_section_ptr = &eh->linker_section_pointer;
3807 }
3808 else
3809 {
3810 BFD_ASSERT (is_ppc_elf (abfd));
3811
3812 /* Allocation of a pointer to a local symbol. */
3813 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3814
3815 /* Allocate a table to hold the local symbols if first time. */
3816 if (!ptr)
3817 {
3818 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3819
3820 amt = num_symbols;
3821 amt *= sizeof (elf_linker_section_pointers_t *);
3822 ptr = bfd_zalloc (abfd, amt);
3823
3824 if (!ptr)
3825 return FALSE;
3826
3827 elf_local_ptr_offsets (abfd) = ptr;
3828 }
3829
3830 /* Has this symbol already been allocated? If so, our work is done. */
3831 if (elf_find_pointer_linker_section (ptr[r_symndx],
3832 rel->r_addend,
3833 lsect))
3834 return TRUE;
3835
3836 ptr_linker_section_ptr = &ptr[r_symndx];
3837 }
3838
3839 /* Allocate space for a pointer in the linker section, and allocate
3840 a new pointer record from internal memory. */
3841 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3842 amt = sizeof (elf_linker_section_pointers_t);
3843 linker_section_ptr = bfd_alloc (abfd, amt);
3844
3845 if (!linker_section_ptr)
3846 return FALSE;
3847
3848 linker_section_ptr->next = *ptr_linker_section_ptr;
3849 linker_section_ptr->addend = rel->r_addend;
3850 linker_section_ptr->lsect = lsect;
3851 *ptr_linker_section_ptr = linker_section_ptr;
3852
3853 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3854 return FALSE;
3855 linker_section_ptr->offset = lsect->section->size;
3856 lsect->section->size += 4;
3857
3858 #ifdef DEBUG
3859 fprintf (stderr,
3860 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3861 lsect->name, (long) linker_section_ptr->offset,
3862 (long) lsect->section->size);
3863 #endif
3864
3865 return TRUE;
3866 }
3867
3868 static struct plt_entry **
3869 update_local_sym_info (bfd *abfd,
3870 Elf_Internal_Shdr *symtab_hdr,
3871 unsigned long r_symndx,
3872 int tls_type)
3873 {
3874 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3875 struct plt_entry **local_plt;
3876 char *local_got_tls_masks;
3877
3878 if (local_got_refcounts == NULL)
3879 {
3880 bfd_size_type size = symtab_hdr->sh_info;
3881
3882 size *= (sizeof (*local_got_refcounts)
3883 + sizeof (*local_plt)
3884 + sizeof (*local_got_tls_masks));
3885 local_got_refcounts = bfd_zalloc (abfd, size);
3886 if (local_got_refcounts == NULL)
3887 return NULL;
3888 elf_local_got_refcounts (abfd) = local_got_refcounts;
3889 }
3890
3891 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3892 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3893 local_got_tls_masks[r_symndx] |= tls_type;
3894 if (tls_type != PLT_IFUNC)
3895 local_got_refcounts[r_symndx] += 1;
3896 return local_plt + r_symndx;
3897 }
3898
3899 static bfd_boolean
3900 update_plt_info (bfd *abfd, struct plt_entry **plist,
3901 asection *sec, bfd_vma addend)
3902 {
3903 struct plt_entry *ent;
3904
3905 if (addend < 32768)
3906 sec = NULL;
3907 for (ent = *plist; ent != NULL; ent = ent->next)
3908 if (ent->sec == sec && ent->addend == addend)
3909 break;
3910 if (ent == NULL)
3911 {
3912 bfd_size_type amt = sizeof (*ent);
3913 ent = bfd_alloc (abfd, amt);
3914 if (ent == NULL)
3915 return FALSE;
3916 ent->next = *plist;
3917 ent->sec = sec;
3918 ent->addend = addend;
3919 ent->plt.refcount = 0;
3920 *plist = ent;
3921 }
3922 ent->plt.refcount += 1;
3923 return TRUE;
3924 }
3925
3926 static struct plt_entry *
3927 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3928 {
3929 struct plt_entry *ent;
3930
3931 if (addend < 32768)
3932 sec = NULL;
3933 for (ent = *plist; ent != NULL; ent = ent->next)
3934 if (ent->sec == sec && ent->addend == addend)
3935 break;
3936 return ent;
3937 }
3938
3939 static bfd_boolean
3940 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3941 {
3942 return (r_type == R_PPC_PLTREL24
3943 || r_type == R_PPC_LOCAL24PC
3944 || r_type == R_PPC_REL24
3945 || r_type == R_PPC_REL14
3946 || r_type == R_PPC_REL14_BRTAKEN
3947 || r_type == R_PPC_REL14_BRNTAKEN
3948 || r_type == R_PPC_ADDR24
3949 || r_type == R_PPC_ADDR14
3950 || r_type == R_PPC_ADDR14_BRTAKEN
3951 || r_type == R_PPC_ADDR14_BRNTAKEN
3952 || r_type == R_PPC_VLE_REL24);
3953 }
3954
3955 static void
3956 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3957 {
3958 (*_bfd_error_handler)
3959 (_("%B: relocation %s cannot be used when making a shared object"),
3960 abfd,
3961 ppc_elf_howto_table[r_type]->name);
3962 bfd_set_error (bfd_error_bad_value);
3963 }
3964
3965 /* Look through the relocs for a section during the first phase, and
3966 allocate space in the global offset table or procedure linkage
3967 table. */
3968
3969 static bfd_boolean
3970 ppc_elf_check_relocs (bfd *abfd,
3971 struct bfd_link_info *info,
3972 asection *sec,
3973 const Elf_Internal_Rela *relocs)
3974 {
3975 struct ppc_elf_link_hash_table *htab;
3976 Elf_Internal_Shdr *symtab_hdr;
3977 struct elf_link_hash_entry **sym_hashes;
3978 const Elf_Internal_Rela *rel;
3979 const Elf_Internal_Rela *rel_end;
3980 asection *got2, *sreloc;
3981 struct elf_link_hash_entry *tga;
3982
3983 if (bfd_link_relocatable (info))
3984 return TRUE;
3985
3986 /* Don't do anything special with non-loaded, non-alloced sections.
3987 In particular, any relocs in such sections should not affect GOT
3988 and PLT reference counting (ie. we don't allow them to create GOT
3989 or PLT entries), there's no possibility or desire to optimize TLS
3990 relocs, and there's not much point in propagating relocs to shared
3991 libs that the dynamic linker won't relocate. */
3992 if ((sec->flags & SEC_ALLOC) == 0)
3993 return TRUE;
3994
3995 #ifdef DEBUG
3996 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3997 sec, abfd);
3998 #endif
3999
4000 BFD_ASSERT (is_ppc_elf (abfd));
4001
4002 /* Initialize howto table if not already done. */
4003 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4004 ppc_elf_howto_init ();
4005
4006 htab = ppc_elf_hash_table (info);
4007 if (htab->glink == NULL)
4008 {
4009 if (htab->elf.dynobj == NULL)
4010 htab->elf.dynobj = abfd;
4011 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4012 return FALSE;
4013 }
4014 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4015 FALSE, FALSE, TRUE);
4016 symtab_hdr = &elf_symtab_hdr (abfd);
4017 sym_hashes = elf_sym_hashes (abfd);
4018 got2 = bfd_get_section_by_name (abfd, ".got2");
4019 sreloc = NULL;
4020
4021 rel_end = relocs + sec->reloc_count;
4022 for (rel = relocs; rel < rel_end; rel++)
4023 {
4024 unsigned long r_symndx;
4025 enum elf_ppc_reloc_type r_type;
4026 struct elf_link_hash_entry *h;
4027 int tls_type;
4028 struct plt_entry **ifunc;
4029
4030 r_symndx = ELF32_R_SYM (rel->r_info);
4031 if (r_symndx < symtab_hdr->sh_info)
4032 h = NULL;
4033 else
4034 {
4035 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4036 while (h->root.type == bfd_link_hash_indirect
4037 || h->root.type == bfd_link_hash_warning)
4038 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4039
4040 /* PR15323, ref flags aren't set for references in the same
4041 object. */
4042 h->root.non_ir_ref = 1;
4043 }
4044
4045 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4046 This shows up in particular in an R_PPC_ADDR32 in the eabi
4047 startup code. */
4048 if (h != NULL
4049 && htab->got == NULL
4050 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4051 {
4052 if (htab->elf.dynobj == NULL)
4053 htab->elf.dynobj = abfd;
4054 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4055 return FALSE;
4056 BFD_ASSERT (h == htab->elf.hgot);
4057 }
4058
4059 tls_type = 0;
4060 r_type = ELF32_R_TYPE (rel->r_info);
4061 ifunc = NULL;
4062 if (h == NULL && !htab->is_vxworks)
4063 {
4064 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4065 abfd, r_symndx);
4066 if (isym == NULL)
4067 return FALSE;
4068
4069 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4070 {
4071 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4072 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4073 PLT_IFUNC);
4074 if (ifunc == NULL)
4075 return FALSE;
4076
4077 /* STT_GNU_IFUNC symbols must have a PLT entry;
4078 In a non-pie executable even when there are
4079 no plt calls. */
4080 if (!bfd_link_pic (info)
4081 || is_branch_reloc (r_type))
4082 {
4083 bfd_vma addend = 0;
4084 if (r_type == R_PPC_PLTREL24)
4085 {
4086 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4087 if (bfd_link_pic (info))
4088 addend = rel->r_addend;
4089 }
4090 if (!update_plt_info (abfd, ifunc, got2, addend))
4091 return FALSE;
4092 }
4093 }
4094 }
4095
4096 if (!htab->is_vxworks
4097 && is_branch_reloc (r_type)
4098 && h != NULL
4099 && h == tga)
4100 {
4101 if (rel != relocs
4102 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4103 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4104 /* We have a new-style __tls_get_addr call with a marker
4105 reloc. */
4106 ;
4107 else
4108 /* Mark this section as having an old-style call. */
4109 sec->has_tls_get_addr_call = 1;
4110 }
4111
4112 switch (r_type)
4113 {
4114 case R_PPC_TLSGD:
4115 case R_PPC_TLSLD:
4116 /* These special tls relocs tie a call to __tls_get_addr with
4117 its parameter symbol. */
4118 break;
4119
4120 case R_PPC_GOT_TLSLD16:
4121 case R_PPC_GOT_TLSLD16_LO:
4122 case R_PPC_GOT_TLSLD16_HI:
4123 case R_PPC_GOT_TLSLD16_HA:
4124 tls_type = TLS_TLS | TLS_LD;
4125 goto dogottls;
4126
4127 case R_PPC_GOT_TLSGD16:
4128 case R_PPC_GOT_TLSGD16_LO:
4129 case R_PPC_GOT_TLSGD16_HI:
4130 case R_PPC_GOT_TLSGD16_HA:
4131 tls_type = TLS_TLS | TLS_GD;
4132 goto dogottls;
4133
4134 case R_PPC_GOT_TPREL16:
4135 case R_PPC_GOT_TPREL16_LO:
4136 case R_PPC_GOT_TPREL16_HI:
4137 case R_PPC_GOT_TPREL16_HA:
4138 if (bfd_link_pic (info))
4139 info->flags |= DF_STATIC_TLS;
4140 tls_type = TLS_TLS | TLS_TPREL;
4141 goto dogottls;
4142
4143 case R_PPC_GOT_DTPREL16:
4144 case R_PPC_GOT_DTPREL16_LO:
4145 case R_PPC_GOT_DTPREL16_HI:
4146 case R_PPC_GOT_DTPREL16_HA:
4147 tls_type = TLS_TLS | TLS_DTPREL;
4148 dogottls:
4149 sec->has_tls_reloc = 1;
4150 /* Fall thru */
4151
4152 /* GOT16 relocations */
4153 case R_PPC_GOT16:
4154 case R_PPC_GOT16_LO:
4155 case R_PPC_GOT16_HI:
4156 case R_PPC_GOT16_HA:
4157 /* This symbol requires a global offset table entry. */
4158 if (htab->got == NULL)
4159 {
4160 if (htab->elf.dynobj == NULL)
4161 htab->elf.dynobj = abfd;
4162 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4163 return FALSE;
4164 }
4165 if (h != NULL)
4166 {
4167 h->got.refcount += 1;
4168 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4169 }
4170 else
4171 /* This is a global offset table entry for a local symbol. */
4172 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4173 return FALSE;
4174
4175 /* We may also need a plt entry if the symbol turns out to be
4176 an ifunc. */
4177 if (h != NULL && !bfd_link_pic (info))
4178 {
4179 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4180 return FALSE;
4181 }
4182 break;
4183
4184 /* Indirect .sdata relocation. */
4185 case R_PPC_EMB_SDAI16:
4186 if (bfd_link_pic (info))
4187 {
4188 bad_shared_reloc (abfd, r_type);
4189 return FALSE;
4190 }
4191 htab->sdata[0].sym->ref_regular = 1;
4192 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4193 h, rel))
4194 return FALSE;
4195 if (h != NULL)
4196 {
4197 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4198 h->non_got_ref = TRUE;
4199 }
4200 break;
4201
4202 /* Indirect .sdata2 relocation. */
4203 case R_PPC_EMB_SDA2I16:
4204 if (bfd_link_pic (info))
4205 {
4206 bad_shared_reloc (abfd, r_type);
4207 return FALSE;
4208 }
4209 htab->sdata[1].sym->ref_regular = 1;
4210 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4211 h, rel))
4212 return FALSE;
4213 if (h != NULL)
4214 {
4215 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4216 h->non_got_ref = TRUE;
4217 }
4218 break;
4219
4220 case R_PPC_SDAREL16:
4221 htab->sdata[0].sym->ref_regular = 1;
4222 /* Fall thru */
4223
4224 case R_PPC_VLE_SDAREL_LO16A:
4225 case R_PPC_VLE_SDAREL_LO16D:
4226 case R_PPC_VLE_SDAREL_HI16A:
4227 case R_PPC_VLE_SDAREL_HI16D:
4228 case R_PPC_VLE_SDAREL_HA16A:
4229 case R_PPC_VLE_SDAREL_HA16D:
4230 if (h != NULL)
4231 {
4232 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4233 h->non_got_ref = TRUE;
4234 }
4235 break;
4236
4237 case R_PPC_VLE_REL8:
4238 case R_PPC_VLE_REL15:
4239 case R_PPC_VLE_REL24:
4240 case R_PPC_VLE_LO16A:
4241 case R_PPC_VLE_LO16D:
4242 case R_PPC_VLE_HI16A:
4243 case R_PPC_VLE_HI16D:
4244 case R_PPC_VLE_HA16A:
4245 case R_PPC_VLE_HA16D:
4246 break;
4247
4248 case R_PPC_EMB_SDA2REL:
4249 if (bfd_link_pic (info))
4250 {
4251 bad_shared_reloc (abfd, r_type);
4252 return FALSE;
4253 }
4254 htab->sdata[1].sym->ref_regular = 1;
4255 if (h != NULL)
4256 {
4257 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4258 h->non_got_ref = TRUE;
4259 }
4260 break;
4261
4262 case R_PPC_VLE_SDA21_LO:
4263 case R_PPC_VLE_SDA21:
4264 case R_PPC_EMB_SDA21:
4265 case R_PPC_EMB_RELSDA:
4266 if (bfd_link_pic (info))
4267 {
4268 bad_shared_reloc (abfd, r_type);
4269 return FALSE;
4270 }
4271 if (h != NULL)
4272 {
4273 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4274 h->non_got_ref = TRUE;
4275 }
4276 break;
4277
4278 case R_PPC_EMB_NADDR32:
4279 case R_PPC_EMB_NADDR16:
4280 case R_PPC_EMB_NADDR16_LO:
4281 case R_PPC_EMB_NADDR16_HI:
4282 case R_PPC_EMB_NADDR16_HA:
4283 if (bfd_link_pic (info))
4284 {
4285 bad_shared_reloc (abfd, r_type);
4286 return FALSE;
4287 }
4288 if (h != NULL)
4289 h->non_got_ref = TRUE;
4290 break;
4291
4292 case R_PPC_PLTREL24:
4293 if (h == NULL)
4294 break;
4295 /* Fall through */
4296 case R_PPC_PLT32:
4297 case R_PPC_PLTREL32:
4298 case R_PPC_PLT16_LO:
4299 case R_PPC_PLT16_HI:
4300 case R_PPC_PLT16_HA:
4301 #ifdef DEBUG
4302 fprintf (stderr, "Reloc requires a PLT entry\n");
4303 #endif
4304 /* This symbol requires a procedure linkage table entry. */
4305 if (h == NULL)
4306 {
4307 if (ifunc == NULL)
4308 {
4309 /* It does not make sense to have a procedure linkage
4310 table entry for a non-ifunc local symbol. */
4311 info->callbacks->einfo
4312 (_("%P: %H: %s reloc against local symbol\n"),
4313 abfd, sec, rel->r_offset,
4314 ppc_elf_howto_table[r_type]->name);
4315 bfd_set_error (bfd_error_bad_value);
4316 return FALSE;
4317 }
4318 }
4319 else
4320 {
4321 bfd_vma addend = 0;
4322
4323 if (r_type == R_PPC_PLTREL24)
4324 {
4325 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4326 if (bfd_link_pic (info))
4327 addend = rel->r_addend;
4328 }
4329 h->needs_plt = 1;
4330 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4331 return FALSE;
4332 }
4333 break;
4334
4335 /* The following relocations don't need to propagate the
4336 relocation if linking a shared object since they are
4337 section relative. */
4338 case R_PPC_SECTOFF:
4339 case R_PPC_SECTOFF_LO:
4340 case R_PPC_SECTOFF_HI:
4341 case R_PPC_SECTOFF_HA:
4342 case R_PPC_DTPREL16:
4343 case R_PPC_DTPREL16_LO:
4344 case R_PPC_DTPREL16_HI:
4345 case R_PPC_DTPREL16_HA:
4346 case R_PPC_TOC16:
4347 break;
4348
4349 case R_PPC_REL16:
4350 case R_PPC_REL16_LO:
4351 case R_PPC_REL16_HI:
4352 case R_PPC_REL16_HA:
4353 case R_PPC_REL16DX_HA:
4354 ppc_elf_tdata (abfd)->has_rel16 = 1;
4355 break;
4356
4357 /* These are just markers. */
4358 case R_PPC_TLS:
4359 case R_PPC_EMB_MRKREF:
4360 case R_PPC_NONE:
4361 case R_PPC_max:
4362 case R_PPC_RELAX:
4363 case R_PPC_RELAX_PLT:
4364 case R_PPC_RELAX_PLTREL24:
4365 break;
4366
4367 /* These should only appear in dynamic objects. */
4368 case R_PPC_COPY:
4369 case R_PPC_GLOB_DAT:
4370 case R_PPC_JMP_SLOT:
4371 case R_PPC_RELATIVE:
4372 case R_PPC_IRELATIVE:
4373 break;
4374
4375 /* These aren't handled yet. We'll report an error later. */
4376 case R_PPC_ADDR30:
4377 case R_PPC_EMB_RELSEC16:
4378 case R_PPC_EMB_RELST_LO:
4379 case R_PPC_EMB_RELST_HI:
4380 case R_PPC_EMB_RELST_HA:
4381 case R_PPC_EMB_BIT_FLD:
4382 break;
4383
4384 /* This refers only to functions defined in the shared library. */
4385 case R_PPC_LOCAL24PC:
4386 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4387 {
4388 htab->plt_type = PLT_OLD;
4389 htab->old_bfd = abfd;
4390 }
4391 if (h != NULL && h->type == STT_GNU_IFUNC)
4392 {
4393 h->needs_plt = 1;
4394 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4395 return FALSE;
4396 }
4397 break;
4398
4399 /* This relocation describes the C++ object vtable hierarchy.
4400 Reconstruct it for later use during GC. */
4401 case R_PPC_GNU_VTINHERIT:
4402 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4403 return FALSE;
4404 break;
4405
4406 /* This relocation describes which C++ vtable entries are actually
4407 used. Record for later use during GC. */
4408 case R_PPC_GNU_VTENTRY:
4409 BFD_ASSERT (h != NULL);
4410 if (h != NULL
4411 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4412 return FALSE;
4413 break;
4414
4415 /* We shouldn't really be seeing these. */
4416 case R_PPC_TPREL32:
4417 case R_PPC_TPREL16:
4418 case R_PPC_TPREL16_LO:
4419 case R_PPC_TPREL16_HI:
4420 case R_PPC_TPREL16_HA:
4421 if (bfd_link_pic (info))
4422 info->flags |= DF_STATIC_TLS;
4423 goto dodyn;
4424
4425 /* Nor these. */
4426 case R_PPC_DTPMOD32:
4427 case R_PPC_DTPREL32:
4428 goto dodyn;
4429
4430 case R_PPC_REL32:
4431 if (h == NULL
4432 && got2 != NULL
4433 && (sec->flags & SEC_CODE) != 0
4434 && bfd_link_pic (info)
4435 && htab->plt_type == PLT_UNSET)
4436 {
4437 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4438 the start of a function, which assembles to a REL32
4439 reference to .got2. If we detect one of these, then
4440 force the old PLT layout because the linker cannot
4441 reliably deduce the GOT pointer value needed for
4442 PLT call stubs. */
4443 asection *s;
4444 Elf_Internal_Sym *isym;
4445
4446 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4447 abfd, r_symndx);
4448 if (isym == NULL)
4449 return FALSE;
4450
4451 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4452 if (s == got2)
4453 {
4454 htab->plt_type = PLT_OLD;
4455 htab->old_bfd = abfd;
4456 }
4457 }
4458 if (h == NULL || h == htab->elf.hgot)
4459 break;
4460 /* fall through */
4461
4462 case R_PPC_ADDR32:
4463 case R_PPC_ADDR16:
4464 case R_PPC_ADDR16_LO:
4465 case R_PPC_ADDR16_HI:
4466 case R_PPC_ADDR16_HA:
4467 case R_PPC_UADDR32:
4468 case R_PPC_UADDR16:
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 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4474 return FALSE;
4475
4476 /* We may need a copy reloc too. */
4477 h->non_got_ref = 1;
4478 h->pointer_equality_needed = 1;
4479 if (r_type == R_PPC_ADDR16_HA)
4480 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4481 if (r_type == R_PPC_ADDR16_LO)
4482 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4483 }
4484 goto dodyn;
4485
4486 case R_PPC_REL24:
4487 case R_PPC_REL14:
4488 case R_PPC_REL14_BRTAKEN:
4489 case R_PPC_REL14_BRNTAKEN:
4490 if (h == NULL)
4491 break;
4492 if (h == htab->elf.hgot)
4493 {
4494 if (htab->plt_type == PLT_UNSET)
4495 {
4496 htab->plt_type = PLT_OLD;
4497 htab->old_bfd = abfd;
4498 }
4499 break;
4500 }
4501 /* fall through */
4502
4503 case R_PPC_ADDR24:
4504 case R_PPC_ADDR14:
4505 case R_PPC_ADDR14_BRTAKEN:
4506 case R_PPC_ADDR14_BRNTAKEN:
4507 if (h != NULL && !bfd_link_pic (info))
4508 {
4509 /* We may need a plt entry if the symbol turns out to be
4510 a function defined in a dynamic object. */
4511 h->needs_plt = 1;
4512 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4513 return FALSE;
4514 break;
4515 }
4516
4517 dodyn:
4518 /* If we are creating a shared library, and this is a reloc
4519 against a global symbol, or a non PC relative reloc
4520 against a local symbol, then we need to copy the reloc
4521 into the shared library. However, if we are linking with
4522 -Bsymbolic, we do not need to copy a reloc against a
4523 global symbol which is defined in an object we are
4524 including in the link (i.e., DEF_REGULAR is set). At
4525 this point we have not seen all the input files, so it is
4526 possible that DEF_REGULAR is not set now but will be set
4527 later (it is never cleared). In case of a weak definition,
4528 DEF_REGULAR may be cleared later by a strong definition in
4529 a shared library. We account for that possibility below by
4530 storing information in the dyn_relocs field of the hash
4531 table entry. A similar situation occurs when creating
4532 shared libraries and symbol visibility changes render the
4533 symbol local.
4534
4535 If on the other hand, we are creating an executable, we
4536 may need to keep relocations for symbols satisfied by a
4537 dynamic library if we manage to avoid copy relocs for the
4538 symbol. */
4539 if ((bfd_link_pic (info)
4540 && (must_be_dyn_reloc (info, r_type)
4541 || (h != NULL
4542 && (!SYMBOLIC_BIND (info, h)
4543 || h->root.type == bfd_link_hash_defweak
4544 || !h->def_regular))))
4545 || (ELIMINATE_COPY_RELOCS
4546 && !bfd_link_pic (info)
4547 && h != NULL
4548 && (h->root.type == bfd_link_hash_defweak
4549 || !h->def_regular)))
4550 {
4551 #ifdef DEBUG
4552 fprintf (stderr,
4553 "ppc_elf_check_relocs needs to "
4554 "create relocation for %s\n",
4555 (h && h->root.root.string
4556 ? h->root.root.string : "<unknown>"));
4557 #endif
4558 if (sreloc == NULL)
4559 {
4560 if (htab->elf.dynobj == NULL)
4561 htab->elf.dynobj = abfd;
4562
4563 sreloc = _bfd_elf_make_dynamic_reloc_section
4564 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4565
4566 if (sreloc == NULL)
4567 return FALSE;
4568 }
4569
4570 /* If this is a global symbol, we count the number of
4571 relocations we need for this symbol. */
4572 if (h != NULL)
4573 {
4574 struct elf_dyn_relocs *p;
4575 struct elf_dyn_relocs **rel_head;
4576
4577 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4578 p = *rel_head;
4579 if (p == NULL || p->sec != sec)
4580 {
4581 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4582 if (p == NULL)
4583 return FALSE;
4584 p->next = *rel_head;
4585 *rel_head = p;
4586 p->sec = sec;
4587 p->count = 0;
4588 p->pc_count = 0;
4589 }
4590 p->count += 1;
4591 if (!must_be_dyn_reloc (info, r_type))
4592 p->pc_count += 1;
4593 }
4594 else
4595 {
4596 /* Track dynamic relocs needed for local syms too.
4597 We really need local syms available to do this
4598 easily. Oh well. */
4599 struct ppc_dyn_relocs *p;
4600 struct ppc_dyn_relocs **rel_head;
4601 bfd_boolean is_ifunc;
4602 asection *s;
4603 void *vpp;
4604 Elf_Internal_Sym *isym;
4605
4606 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4607 abfd, r_symndx);
4608 if (isym == NULL)
4609 return FALSE;
4610
4611 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4612 if (s == NULL)
4613 s = sec;
4614
4615 vpp = &elf_section_data (s)->local_dynrel;
4616 rel_head = (struct ppc_dyn_relocs **) vpp;
4617 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4618 p = *rel_head;
4619 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4620 p = p->next;
4621 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4622 {
4623 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4624 if (p == NULL)
4625 return FALSE;
4626 p->next = *rel_head;
4627 *rel_head = p;
4628 p->sec = sec;
4629 p->ifunc = is_ifunc;
4630 p->count = 0;
4631 }
4632 p->count += 1;
4633 }
4634 }
4635
4636 break;
4637 }
4638 }
4639
4640 return TRUE;
4641 }
4642 \f
4643
4644 /* Merge object attributes from IBFD into OBFD. Raise an error if
4645 there are conflicting attributes. */
4646 static bfd_boolean
4647 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4648 {
4649 obj_attribute *in_attr, *in_attrs;
4650 obj_attribute *out_attr, *out_attrs;
4651
4652 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4653 {
4654 /* This is the first object. Copy the attributes. */
4655 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4656
4657 /* Use the Tag_null value to indicate the attributes have been
4658 initialized. */
4659 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4660
4661 return TRUE;
4662 }
4663
4664 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4665 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4666
4667 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4668 non-conflicting ones. */
4669 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4670 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4671 if (in_attr->i != out_attr->i)
4672 {
4673 out_attr->type = 1;
4674 if (out_attr->i == 0)
4675 out_attr->i = in_attr->i;
4676 else if (in_attr->i == 0)
4677 ;
4678 else if (out_attr->i == 1 && in_attr->i == 2)
4679 _bfd_error_handler
4680 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4681 else if (out_attr->i == 1 && in_attr->i == 3)
4682 _bfd_error_handler
4683 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4684 obfd, ibfd);
4685 else if (out_attr->i == 3 && in_attr->i == 1)
4686 _bfd_error_handler
4687 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4688 ibfd, obfd);
4689 else if (out_attr->i == 3 && in_attr->i == 2)
4690 _bfd_error_handler
4691 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4692 ibfd, obfd);
4693 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4694 _bfd_error_handler
4695 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4696 else if (in_attr->i > 3)
4697 _bfd_error_handler
4698 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4699 in_attr->i);
4700 else
4701 _bfd_error_handler
4702 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4703 out_attr->i);
4704 }
4705
4706 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4707 merge non-conflicting ones. */
4708 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4709 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4710 if (in_attr->i != out_attr->i)
4711 {
4712 const char *in_abi = NULL, *out_abi = NULL;
4713
4714 switch (in_attr->i)
4715 {
4716 case 1: in_abi = "generic"; break;
4717 case 2: in_abi = "AltiVec"; break;
4718 case 3: in_abi = "SPE"; break;
4719 }
4720
4721 switch (out_attr->i)
4722 {
4723 case 1: out_abi = "generic"; break;
4724 case 2: out_abi = "AltiVec"; break;
4725 case 3: out_abi = "SPE"; break;
4726 }
4727
4728 out_attr->type = 1;
4729 if (out_attr->i == 0)
4730 out_attr->i = in_attr->i;
4731 else if (in_attr->i == 0)
4732 ;
4733 /* For now, allow generic to transition to AltiVec or SPE
4734 without a warning. If GCC marked files with their stack
4735 alignment and used don't-care markings for files which are
4736 not affected by the vector ABI, we could warn about this
4737 case too. */
4738 else if (out_attr->i == 1)
4739 out_attr->i = in_attr->i;
4740 else if (in_attr->i == 1)
4741 ;
4742 else if (in_abi == NULL)
4743 _bfd_error_handler
4744 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4745 in_attr->i);
4746 else if (out_abi == NULL)
4747 _bfd_error_handler
4748 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4749 in_attr->i);
4750 else
4751 _bfd_error_handler
4752 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4753 ibfd, obfd, in_abi, out_abi);
4754 }
4755
4756 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4757 and merge non-conflicting ones. */
4758 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4759 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4760 if (in_attr->i != out_attr->i)
4761 {
4762 out_attr->type = 1;
4763 if (out_attr->i == 0)
4764 out_attr->i = in_attr->i;
4765 else if (in_attr->i == 0)
4766 ;
4767 else if (out_attr->i == 1 && in_attr->i == 2)
4768 _bfd_error_handler
4769 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4770 else if (out_attr->i == 2 && in_attr->i == 1)
4771 _bfd_error_handler
4772 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4773 else if (in_attr->i > 2)
4774 _bfd_error_handler
4775 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4776 in_attr->i);
4777 else
4778 _bfd_error_handler
4779 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4780 out_attr->i);
4781 }
4782
4783 /* Merge Tag_compatibility attributes and any common GNU ones. */
4784 _bfd_elf_merge_object_attributes (ibfd, obfd);
4785
4786 return TRUE;
4787 }
4788
4789 /* Merge backend specific data from an object file to the output
4790 object file when linking. */
4791
4792 static bfd_boolean
4793 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4794 {
4795 flagword old_flags;
4796 flagword new_flags;
4797 bfd_boolean error;
4798
4799 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4800 return TRUE;
4801
4802 /* Check if we have the same endianness. */
4803 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4804 return FALSE;
4805
4806 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4807 return FALSE;
4808
4809 new_flags = elf_elfheader (ibfd)->e_flags;
4810 old_flags = elf_elfheader (obfd)->e_flags;
4811 if (!elf_flags_init (obfd))
4812 {
4813 /* First call, no flags set. */
4814 elf_flags_init (obfd) = TRUE;
4815 elf_elfheader (obfd)->e_flags = new_flags;
4816 }
4817
4818 /* Compatible flags are ok. */
4819 else if (new_flags == old_flags)
4820 ;
4821
4822 /* Incompatible flags. */
4823 else
4824 {
4825 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4826 to be linked with either. */
4827 error = FALSE;
4828 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4829 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4830 {
4831 error = TRUE;
4832 (*_bfd_error_handler)
4833 (_("%B: compiled with -mrelocatable and linked with "
4834 "modules compiled normally"), ibfd);
4835 }
4836 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4837 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4838 {
4839 error = TRUE;
4840 (*_bfd_error_handler)
4841 (_("%B: compiled normally and linked with "
4842 "modules compiled with -mrelocatable"), ibfd);
4843 }
4844
4845 /* The output is -mrelocatable-lib iff both the input files are. */
4846 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4847 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4848
4849 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4850 but each input file is either -mrelocatable or -mrelocatable-lib. */
4851 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4852 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4853 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4854 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4855
4856 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4857 any module uses it. */
4858 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4859
4860 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4861 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4862
4863 /* Warn about any other mismatches. */
4864 if (new_flags != old_flags)
4865 {
4866 error = TRUE;
4867 (*_bfd_error_handler)
4868 (_("%B: uses different e_flags (0x%lx) fields "
4869 "than previous modules (0x%lx)"),
4870 ibfd, (long) new_flags, (long) old_flags);
4871 }
4872
4873 if (error)
4874 {
4875 bfd_set_error (bfd_error_bad_value);
4876 return FALSE;
4877 }
4878 }
4879
4880 return TRUE;
4881 }
4882
4883 static void
4884 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4885 bfd_vma value,
4886 split16_format_type split16_format)
4887
4888 {
4889 unsigned int insn, top5;
4890
4891 insn = bfd_get_32 (output_bfd, loc);
4892 top5 = value & 0xf800;
4893 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4894 insn &= (split16_format == split16a_type ? ~0x1f007ff : ~0x1f07ff);
4895 insn |= top5;
4896 insn |= value & 0x7ff;
4897 bfd_put_32 (output_bfd, insn, loc);
4898 }
4899
4900 \f
4901 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4902 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4903 int
4904 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4905 struct bfd_link_info *info)
4906 {
4907 struct ppc_elf_link_hash_table *htab;
4908 flagword flags;
4909
4910 htab = ppc_elf_hash_table (info);
4911
4912 if (htab->plt_type == PLT_UNSET)
4913 {
4914 struct elf_link_hash_entry *h;
4915
4916 if (htab->params->plt_style == PLT_OLD)
4917 htab->plt_type = PLT_OLD;
4918 else if (bfd_link_pic (info)
4919 && htab->elf.dynamic_sections_created
4920 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4921 FALSE, FALSE, TRUE)) != NULL
4922 && (h->type == STT_FUNC
4923 || h->needs_plt)
4924 && h->ref_regular
4925 && !(SYMBOL_CALLS_LOCAL (info, h)
4926 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4927 && h->root.type == bfd_link_hash_undefweak)))
4928 {
4929 /* Profiling of shared libs (and pies) is not supported with
4930 secure plt, because ppc32 does profiling before a
4931 function prologue and a secure plt pic call stubs needs
4932 r30 to be set up. */
4933 htab->plt_type = PLT_OLD;
4934 }
4935 else
4936 {
4937 bfd *ibfd;
4938 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4939
4940 /* Look through the reloc flags left by ppc_elf_check_relocs.
4941 Use the old style bss plt if a file makes plt calls
4942 without using the new relocs, and if ld isn't given
4943 --secure-plt and we never see REL16 relocs. */
4944 if (plt_type == PLT_UNSET)
4945 plt_type = PLT_OLD;
4946 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4947 if (is_ppc_elf (ibfd))
4948 {
4949 if (ppc_elf_tdata (ibfd)->has_rel16)
4950 plt_type = PLT_NEW;
4951 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4952 {
4953 plt_type = PLT_OLD;
4954 htab->old_bfd = ibfd;
4955 break;
4956 }
4957 }
4958 htab->plt_type = plt_type;
4959 }
4960 }
4961 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4962 {
4963 if (htab->old_bfd != NULL)
4964 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4965 htab->old_bfd);
4966 else
4967 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4968 }
4969
4970 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4971
4972 if (htab->plt_type == PLT_NEW)
4973 {
4974 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4975 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4976
4977 /* The new PLT is a loaded section. */
4978 if (htab->plt != NULL
4979 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4980 return -1;
4981
4982 /* The new GOT is not executable. */
4983 if (htab->got != NULL
4984 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4985 return -1;
4986 }
4987 else
4988 {
4989 /* Stop an unused .glink section from affecting .text alignment. */
4990 if (htab->glink != NULL
4991 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4992 return -1;
4993 }
4994 return htab->plt_type == PLT_NEW;
4995 }
4996 \f
4997 /* Return the section that should be marked against GC for a given
4998 relocation. */
4999
5000 static asection *
5001 ppc_elf_gc_mark_hook (asection *sec,
5002 struct bfd_link_info *info,
5003 Elf_Internal_Rela *rel,
5004 struct elf_link_hash_entry *h,
5005 Elf_Internal_Sym *sym)
5006 {
5007 if (h != NULL)
5008 switch (ELF32_R_TYPE (rel->r_info))
5009 {
5010 case R_PPC_GNU_VTINHERIT:
5011 case R_PPC_GNU_VTENTRY:
5012 return NULL;
5013 }
5014
5015 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5016 }
5017
5018 /* Update the got, plt and dynamic reloc reference counts for the
5019 section being removed. */
5020
5021 static bfd_boolean
5022 ppc_elf_gc_sweep_hook (bfd *abfd,
5023 struct bfd_link_info *info,
5024 asection *sec,
5025 const Elf_Internal_Rela *relocs)
5026 {
5027 struct ppc_elf_link_hash_table *htab;
5028 Elf_Internal_Shdr *symtab_hdr;
5029 struct elf_link_hash_entry **sym_hashes;
5030 bfd_signed_vma *local_got_refcounts;
5031 const Elf_Internal_Rela *rel, *relend;
5032 asection *got2;
5033
5034 if (bfd_link_relocatable (info))
5035 return TRUE;
5036
5037 if ((sec->flags & SEC_ALLOC) == 0)
5038 return TRUE;
5039
5040 elf_section_data (sec)->local_dynrel = NULL;
5041
5042 htab = ppc_elf_hash_table (info);
5043 symtab_hdr = &elf_symtab_hdr (abfd);
5044 sym_hashes = elf_sym_hashes (abfd);
5045 local_got_refcounts = elf_local_got_refcounts (abfd);
5046 got2 = bfd_get_section_by_name (abfd, ".got2");
5047
5048 relend = relocs + sec->reloc_count;
5049 for (rel = relocs; rel < relend; rel++)
5050 {
5051 unsigned long r_symndx;
5052 enum elf_ppc_reloc_type r_type;
5053 struct elf_link_hash_entry *h = NULL;
5054
5055 r_symndx = ELF32_R_SYM (rel->r_info);
5056 if (r_symndx >= symtab_hdr->sh_info)
5057 {
5058 struct elf_dyn_relocs **pp, *p;
5059 struct ppc_elf_link_hash_entry *eh;
5060
5061 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5062 while (h->root.type == bfd_link_hash_indirect
5063 || h->root.type == bfd_link_hash_warning)
5064 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5065 eh = (struct ppc_elf_link_hash_entry *) h;
5066
5067 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5068 if (p->sec == sec)
5069 {
5070 /* Everything must go for SEC. */
5071 *pp = p->next;
5072 break;
5073 }
5074 }
5075
5076 r_type = ELF32_R_TYPE (rel->r_info);
5077 if (!htab->is_vxworks
5078 && h == NULL
5079 && local_got_refcounts != NULL
5080 && (!bfd_link_pic (info)
5081 || is_branch_reloc (r_type)))
5082 {
5083 struct plt_entry **local_plt = (struct plt_entry **)
5084 (local_got_refcounts + symtab_hdr->sh_info);
5085 char *local_got_tls_masks = (char *)
5086 (local_plt + symtab_hdr->sh_info);
5087 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5088 {
5089 struct plt_entry **ifunc = local_plt + r_symndx;
5090 bfd_vma addend = 0;
5091 struct plt_entry *ent;
5092
5093 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5094 addend = rel->r_addend;
5095 ent = find_plt_ent (ifunc, got2, addend);
5096 if (ent->plt.refcount > 0)
5097 ent->plt.refcount -= 1;
5098 continue;
5099 }
5100 }
5101
5102 switch (r_type)
5103 {
5104 case R_PPC_GOT_TLSLD16:
5105 case R_PPC_GOT_TLSLD16_LO:
5106 case R_PPC_GOT_TLSLD16_HI:
5107 case R_PPC_GOT_TLSLD16_HA:
5108 case R_PPC_GOT_TLSGD16:
5109 case R_PPC_GOT_TLSGD16_LO:
5110 case R_PPC_GOT_TLSGD16_HI:
5111 case R_PPC_GOT_TLSGD16_HA:
5112 case R_PPC_GOT_TPREL16:
5113 case R_PPC_GOT_TPREL16_LO:
5114 case R_PPC_GOT_TPREL16_HI:
5115 case R_PPC_GOT_TPREL16_HA:
5116 case R_PPC_GOT_DTPREL16:
5117 case R_PPC_GOT_DTPREL16_LO:
5118 case R_PPC_GOT_DTPREL16_HI:
5119 case R_PPC_GOT_DTPREL16_HA:
5120 case R_PPC_GOT16:
5121 case R_PPC_GOT16_LO:
5122 case R_PPC_GOT16_HI:
5123 case R_PPC_GOT16_HA:
5124 if (h != NULL)
5125 {
5126 if (h->got.refcount > 0)
5127 h->got.refcount--;
5128 if (!bfd_link_pic (info))
5129 {
5130 struct plt_entry *ent;
5131
5132 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5133 if (ent != NULL && ent->plt.refcount > 0)
5134 ent->plt.refcount -= 1;
5135 }
5136 }
5137 else if (local_got_refcounts != NULL)
5138 {
5139 if (local_got_refcounts[r_symndx] > 0)
5140 local_got_refcounts[r_symndx]--;
5141 }
5142 break;
5143
5144 case R_PPC_REL24:
5145 case R_PPC_REL14:
5146 case R_PPC_REL14_BRTAKEN:
5147 case R_PPC_REL14_BRNTAKEN:
5148 case R_PPC_REL32:
5149 if (h == NULL || h == htab->elf.hgot)
5150 break;
5151 /* Fall thru */
5152
5153 case R_PPC_ADDR32:
5154 case R_PPC_ADDR24:
5155 case R_PPC_ADDR16:
5156 case R_PPC_ADDR16_LO:
5157 case R_PPC_ADDR16_HI:
5158 case R_PPC_ADDR16_HA:
5159 case R_PPC_ADDR14:
5160 case R_PPC_ADDR14_BRTAKEN:
5161 case R_PPC_ADDR14_BRNTAKEN:
5162 case R_PPC_UADDR32:
5163 case R_PPC_UADDR16:
5164 if (bfd_link_pic (info))
5165 break;
5166
5167 case R_PPC_PLT32:
5168 case R_PPC_PLTREL24:
5169 case R_PPC_PLTREL32:
5170 case R_PPC_PLT16_LO:
5171 case R_PPC_PLT16_HI:
5172 case R_PPC_PLT16_HA:
5173 if (h != NULL)
5174 {
5175 bfd_vma addend = 0;
5176 struct plt_entry *ent;
5177
5178 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5179 addend = rel->r_addend;
5180 ent = find_plt_ent (&h->plt.plist, got2, addend);
5181 if (ent != NULL && ent->plt.refcount > 0)
5182 ent->plt.refcount -= 1;
5183 }
5184 break;
5185
5186 default:
5187 break;
5188 }
5189 }
5190 return TRUE;
5191 }
5192 \f
5193 /* Set plt output section type, htab->tls_get_addr, and call the
5194 generic ELF tls_setup function. */
5195
5196 asection *
5197 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5198 {
5199 struct ppc_elf_link_hash_table *htab;
5200
5201 htab = ppc_elf_hash_table (info);
5202 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5203 FALSE, FALSE, TRUE);
5204 if (htab->plt_type != PLT_NEW)
5205 htab->params->no_tls_get_addr_opt = TRUE;
5206
5207 if (!htab->params->no_tls_get_addr_opt)
5208 {
5209 struct elf_link_hash_entry *opt, *tga;
5210 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5211 FALSE, FALSE, TRUE);
5212 if (opt != NULL
5213 && (opt->root.type == bfd_link_hash_defined
5214 || opt->root.type == bfd_link_hash_defweak))
5215 {
5216 /* If glibc supports an optimized __tls_get_addr call stub,
5217 signalled by the presence of __tls_get_addr_opt, and we'll
5218 be calling __tls_get_addr via a plt call stub, then
5219 make __tls_get_addr point to __tls_get_addr_opt. */
5220 tga = htab->tls_get_addr;
5221 if (htab->elf.dynamic_sections_created
5222 && tga != NULL
5223 && (tga->type == STT_FUNC
5224 || tga->needs_plt)
5225 && !(SYMBOL_CALLS_LOCAL (info, tga)
5226 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5227 && tga->root.type == bfd_link_hash_undefweak)))
5228 {
5229 struct plt_entry *ent;
5230 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5231 if (ent->plt.refcount > 0)
5232 break;
5233 if (ent != NULL)
5234 {
5235 tga->root.type = bfd_link_hash_indirect;
5236 tga->root.u.i.link = &opt->root;
5237 ppc_elf_copy_indirect_symbol (info, opt, tga);
5238 opt->forced_local = 0;
5239 if (opt->dynindx != -1)
5240 {
5241 /* Use __tls_get_addr_opt in dynamic relocations. */
5242 opt->dynindx = -1;
5243 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5244 opt->dynstr_index);
5245 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5246 return FALSE;
5247 }
5248 htab->tls_get_addr = opt;
5249 }
5250 }
5251 }
5252 else
5253 htab->params->no_tls_get_addr_opt = TRUE;
5254 }
5255 if (htab->plt_type == PLT_NEW
5256 && htab->plt != NULL
5257 && htab->plt->output_section != NULL)
5258 {
5259 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5260 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5261 }
5262
5263 return _bfd_elf_tls_setup (obfd, info);
5264 }
5265
5266 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5267 HASH. */
5268
5269 static bfd_boolean
5270 branch_reloc_hash_match (const bfd *ibfd,
5271 const Elf_Internal_Rela *rel,
5272 const struct elf_link_hash_entry *hash)
5273 {
5274 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5275 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5276 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5277
5278 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5279 {
5280 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5281 struct elf_link_hash_entry *h;
5282
5283 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5284 while (h->root.type == bfd_link_hash_indirect
5285 || h->root.type == bfd_link_hash_warning)
5286 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5287 if (h == hash)
5288 return TRUE;
5289 }
5290 return FALSE;
5291 }
5292
5293 /* Run through all the TLS relocs looking for optimization
5294 opportunities. */
5295
5296 bfd_boolean
5297 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5298 struct bfd_link_info *info)
5299 {
5300 bfd *ibfd;
5301 asection *sec;
5302 struct ppc_elf_link_hash_table *htab;
5303 int pass;
5304
5305 if (!bfd_link_executable (info))
5306 return TRUE;
5307
5308 htab = ppc_elf_hash_table (info);
5309 if (htab == NULL)
5310 return FALSE;
5311
5312 /* Make two passes through the relocs. First time check that tls
5313 relocs involved in setting up a tls_get_addr call are indeed
5314 followed by such a call. If they are not, don't do any tls
5315 optimization. On the second pass twiddle tls_mask flags to
5316 notify relocate_section that optimization can be done, and
5317 adjust got and plt refcounts. */
5318 for (pass = 0; pass < 2; ++pass)
5319 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5320 {
5321 Elf_Internal_Sym *locsyms = NULL;
5322 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5323 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5324
5325 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5326 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5327 {
5328 Elf_Internal_Rela *relstart, *rel, *relend;
5329 int expecting_tls_get_addr = 0;
5330
5331 /* Read the relocations. */
5332 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5333 info->keep_memory);
5334 if (relstart == NULL)
5335 return FALSE;
5336
5337 relend = relstart + sec->reloc_count;
5338 for (rel = relstart; rel < relend; rel++)
5339 {
5340 enum elf_ppc_reloc_type r_type;
5341 unsigned long r_symndx;
5342 struct elf_link_hash_entry *h = NULL;
5343 char *tls_mask;
5344 char tls_set, tls_clear;
5345 bfd_boolean is_local;
5346 bfd_signed_vma *got_count;
5347
5348 r_symndx = ELF32_R_SYM (rel->r_info);
5349 if (r_symndx >= symtab_hdr->sh_info)
5350 {
5351 struct elf_link_hash_entry **sym_hashes;
5352
5353 sym_hashes = elf_sym_hashes (ibfd);
5354 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5355 while (h->root.type == bfd_link_hash_indirect
5356 || h->root.type == bfd_link_hash_warning)
5357 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5358 }
5359
5360 is_local = FALSE;
5361 if (h == NULL
5362 || !h->def_dynamic)
5363 is_local = TRUE;
5364
5365 r_type = ELF32_R_TYPE (rel->r_info);
5366 /* If this section has old-style __tls_get_addr calls
5367 without marker relocs, then check that each
5368 __tls_get_addr call reloc is preceded by a reloc
5369 that conceivably belongs to the __tls_get_addr arg
5370 setup insn. If we don't find matching arg setup
5371 relocs, don't do any tls optimization. */
5372 if (pass == 0
5373 && sec->has_tls_get_addr_call
5374 && h != NULL
5375 && h == htab->tls_get_addr
5376 && !expecting_tls_get_addr
5377 && is_branch_reloc (r_type))
5378 {
5379 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5380 "TLS optimization disabled\n",
5381 ibfd, sec, rel->r_offset);
5382 if (elf_section_data (sec)->relocs != relstart)
5383 free (relstart);
5384 return TRUE;
5385 }
5386
5387 expecting_tls_get_addr = 0;
5388 switch (r_type)
5389 {
5390 case R_PPC_GOT_TLSLD16:
5391 case R_PPC_GOT_TLSLD16_LO:
5392 expecting_tls_get_addr = 1;
5393 /* Fall thru */
5394
5395 case R_PPC_GOT_TLSLD16_HI:
5396 case R_PPC_GOT_TLSLD16_HA:
5397 /* These relocs should never be against a symbol
5398 defined in a shared lib. Leave them alone if
5399 that turns out to be the case. */
5400 if (!is_local)
5401 continue;
5402
5403 /* LD -> LE */
5404 tls_set = 0;
5405 tls_clear = TLS_LD;
5406 break;
5407
5408 case R_PPC_GOT_TLSGD16:
5409 case R_PPC_GOT_TLSGD16_LO:
5410 expecting_tls_get_addr = 1;
5411 /* Fall thru */
5412
5413 case R_PPC_GOT_TLSGD16_HI:
5414 case R_PPC_GOT_TLSGD16_HA:
5415 if (is_local)
5416 /* GD -> LE */
5417 tls_set = 0;
5418 else
5419 /* GD -> IE */
5420 tls_set = TLS_TLS | TLS_TPRELGD;
5421 tls_clear = TLS_GD;
5422 break;
5423
5424 case R_PPC_GOT_TPREL16:
5425 case R_PPC_GOT_TPREL16_LO:
5426 case R_PPC_GOT_TPREL16_HI:
5427 case R_PPC_GOT_TPREL16_HA:
5428 if (is_local)
5429 {
5430 /* IE -> LE */
5431 tls_set = 0;
5432 tls_clear = TLS_TPREL;
5433 break;
5434 }
5435 else
5436 continue;
5437
5438 case R_PPC_TLSGD:
5439 case R_PPC_TLSLD:
5440 expecting_tls_get_addr = 2;
5441 tls_set = 0;
5442 tls_clear = 0;
5443 break;
5444
5445 default:
5446 continue;
5447 }
5448
5449 if (pass == 0)
5450 {
5451 if (!expecting_tls_get_addr
5452 || (expecting_tls_get_addr == 1
5453 && !sec->has_tls_get_addr_call))
5454 continue;
5455
5456 if (rel + 1 < relend
5457 && branch_reloc_hash_match (ibfd, rel + 1,
5458 htab->tls_get_addr))
5459 continue;
5460
5461 /* Uh oh, we didn't find the expected call. We
5462 could just mark this symbol to exclude it
5463 from tls optimization but it's safer to skip
5464 the entire optimization. */
5465 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5466 "TLS optimization disabled\n"),
5467 ibfd, sec, rel->r_offset);
5468 if (elf_section_data (sec)->relocs != relstart)
5469 free (relstart);
5470 return TRUE;
5471 }
5472
5473 if (expecting_tls_get_addr)
5474 {
5475 struct plt_entry *ent;
5476 bfd_vma addend = 0;
5477
5478 if (bfd_link_pic (info)
5479 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5480 addend = rel[1].r_addend;
5481 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5482 got2, addend);
5483 if (ent != NULL && ent->plt.refcount > 0)
5484 ent->plt.refcount -= 1;
5485
5486 if (expecting_tls_get_addr == 2)
5487 continue;
5488 }
5489
5490 if (h != NULL)
5491 {
5492 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5493 got_count = &h->got.refcount;
5494 }
5495 else
5496 {
5497 bfd_signed_vma *lgot_refs;
5498 struct plt_entry **local_plt;
5499 char *lgot_masks;
5500
5501 if (locsyms == NULL)
5502 {
5503 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5504 if (locsyms == NULL)
5505 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5506 symtab_hdr->sh_info,
5507 0, NULL, NULL, NULL);
5508 if (locsyms == NULL)
5509 {
5510 if (elf_section_data (sec)->relocs != relstart)
5511 free (relstart);
5512 return FALSE;
5513 }
5514 }
5515 lgot_refs = elf_local_got_refcounts (ibfd);
5516 if (lgot_refs == NULL)
5517 abort ();
5518 local_plt = (struct plt_entry **)
5519 (lgot_refs + symtab_hdr->sh_info);
5520 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5521 tls_mask = &lgot_masks[r_symndx];
5522 got_count = &lgot_refs[r_symndx];
5523 }
5524
5525 if (tls_set == 0)
5526 {
5527 /* We managed to get rid of a got entry. */
5528 if (*got_count > 0)
5529 *got_count -= 1;
5530 }
5531
5532 *tls_mask |= tls_set;
5533 *tls_mask &= ~tls_clear;
5534 }
5535
5536 if (elf_section_data (sec)->relocs != relstart)
5537 free (relstart);
5538 }
5539
5540 if (locsyms != NULL
5541 && (symtab_hdr->contents != (unsigned char *) locsyms))
5542 {
5543 if (!info->keep_memory)
5544 free (locsyms);
5545 else
5546 symtab_hdr->contents = (unsigned char *) locsyms;
5547 }
5548 }
5549 return TRUE;
5550 }
5551 \f
5552 /* Return true if we have dynamic relocs that apply to read-only sections. */
5553
5554 static bfd_boolean
5555 readonly_dynrelocs (struct elf_link_hash_entry *h)
5556 {
5557 struct elf_dyn_relocs *p;
5558
5559 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5560 {
5561 asection *s = p->sec->output_section;
5562
5563 if (s != NULL
5564 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5565 == (SEC_READONLY | SEC_ALLOC)))
5566 return TRUE;
5567 }
5568 return FALSE;
5569 }
5570
5571 /* Adjust a symbol defined by a dynamic object and referenced by a
5572 regular object. The current definition is in some section of the
5573 dynamic object, but we're not including those sections. We have to
5574 change the definition to something the rest of the link can
5575 understand. */
5576
5577 static bfd_boolean
5578 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5579 struct elf_link_hash_entry *h)
5580 {
5581 struct ppc_elf_link_hash_table *htab;
5582 asection *s;
5583
5584 #ifdef DEBUG
5585 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5586 h->root.root.string);
5587 #endif
5588
5589 /* Make sure we know what is going on here. */
5590 htab = ppc_elf_hash_table (info);
5591 BFD_ASSERT (htab->elf.dynobj != NULL
5592 && (h->needs_plt
5593 || h->type == STT_GNU_IFUNC
5594 || h->u.weakdef != NULL
5595 || (h->def_dynamic
5596 && h->ref_regular
5597 && !h->def_regular)));
5598
5599 /* Deal with function syms. */
5600 if (h->type == STT_FUNC
5601 || h->type == STT_GNU_IFUNC
5602 || h->needs_plt)
5603 {
5604 /* Clear procedure linkage table information for any symbol that
5605 won't need a .plt entry. */
5606 struct plt_entry *ent;
5607 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5608 if (ent->plt.refcount > 0)
5609 break;
5610 if (ent == NULL
5611 || (h->type != STT_GNU_IFUNC
5612 && (SYMBOL_CALLS_LOCAL (info, h)
5613 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5614 && h->root.type == bfd_link_hash_undefweak))))
5615 {
5616 /* A PLT entry is not required/allowed when:
5617
5618 1. We are not using ld.so; because then the PLT entry
5619 can't be set up, so we can't use one. In this case,
5620 ppc_elf_adjust_dynamic_symbol won't even be called.
5621
5622 2. GC has rendered the entry unused.
5623
5624 3. We know for certain that a call to this symbol
5625 will go to this object, or will remain undefined. */
5626 h->plt.plist = NULL;
5627 h->needs_plt = 0;
5628 h->pointer_equality_needed = 0;
5629 }
5630 else
5631 {
5632 /* Taking a function's address in a read/write section
5633 doesn't require us to define the function symbol in the
5634 executable on a plt call stub. A dynamic reloc can
5635 be used instead. */
5636 if (h->pointer_equality_needed
5637 && h->type != STT_GNU_IFUNC
5638 && !htab->is_vxworks
5639 && !ppc_elf_hash_entry (h)->has_sda_refs
5640 && !readonly_dynrelocs (h))
5641 {
5642 h->pointer_equality_needed = 0;
5643 h->non_got_ref = 0;
5644 }
5645
5646 /* After adjust_dynamic_symbol, non_got_ref set in the
5647 non-shared case means that we have allocated space in
5648 .dynbss for the symbol and thus dyn_relocs for this
5649 symbol should be discarded.
5650 If we get here we know we are making a PLT entry for this
5651 symbol, and in an executable we'd normally resolve
5652 relocations against this symbol to the PLT entry. Allow
5653 dynamic relocs if the reference is weak, and the dynamic
5654 relocs will not cause text relocation. */
5655 else if (!h->ref_regular_nonweak
5656 && h->non_got_ref
5657 && h->type != STT_GNU_IFUNC
5658 && !htab->is_vxworks
5659 && !ppc_elf_hash_entry (h)->has_sda_refs
5660 && !readonly_dynrelocs (h))
5661 h->non_got_ref = 0;
5662 }
5663 h->protected_def = 0;
5664 return TRUE;
5665 }
5666 else
5667 h->plt.plist = NULL;
5668
5669 /* If this is a weak symbol, and there is a real definition, the
5670 processor independent code will have arranged for us to see the
5671 real definition first, and we can just use the same value. */
5672 if (h->u.weakdef != NULL)
5673 {
5674 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5675 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5676 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5677 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5678 if (ELIMINATE_COPY_RELOCS)
5679 h->non_got_ref = h->u.weakdef->non_got_ref;
5680 return TRUE;
5681 }
5682
5683 /* This is a reference to a symbol defined by a dynamic object which
5684 is not a function. */
5685
5686 /* If we are creating a shared library, we must presume that the
5687 only references to the symbol are via the global offset table.
5688 For such cases we need not do anything here; the relocations will
5689 be handled correctly by relocate_section. */
5690 if (bfd_link_pic (info))
5691 {
5692 h->protected_def = 0;
5693 return TRUE;
5694 }
5695
5696 /* If there are no references to this symbol that do not use the
5697 GOT, we don't need to generate a copy reloc. */
5698 if (!h->non_got_ref)
5699 {
5700 h->protected_def = 0;
5701 return TRUE;
5702 }
5703
5704 /* Protected variables do not work with .dynbss. The copy in
5705 .dynbss won't be used by the shared library with the protected
5706 definition for the variable. Editing to PIC, or text relocations
5707 are preferable to an incorrect program. */
5708 if (h->protected_def)
5709 {
5710 if (ELIMINATE_COPY_RELOCS
5711 && ppc_elf_hash_entry (h)->has_addr16_ha
5712 && ppc_elf_hash_entry (h)->has_addr16_lo
5713 && htab->params->pic_fixup == 0
5714 && info->disable_target_specific_optimizations <= 1)
5715 htab->params->pic_fixup = 1;
5716 h->non_got_ref = 0;
5717 return TRUE;
5718 }
5719
5720 /* If -z nocopyreloc was given, we won't generate them either. */
5721 if (info->nocopyreloc)
5722 {
5723 h->non_got_ref = 0;
5724 return TRUE;
5725 }
5726
5727 /* If we didn't find any dynamic relocs in read-only sections, then
5728 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5729 We can't do this if there are any small data relocations. This
5730 doesn't work on VxWorks, where we can not have dynamic
5731 relocations (other than copy and jump slot relocations) in an
5732 executable. */
5733 if (ELIMINATE_COPY_RELOCS
5734 && !ppc_elf_hash_entry (h)->has_sda_refs
5735 && !htab->is_vxworks
5736 && !h->def_regular
5737 && !readonly_dynrelocs (h))
5738 {
5739 h->non_got_ref = 0;
5740 return TRUE;
5741 }
5742
5743 /* We must allocate the symbol in our .dynbss section, which will
5744 become part of the .bss section of the executable. There will be
5745 an entry for this symbol in the .dynsym section. The dynamic
5746 object will contain position independent code, so all references
5747 from the dynamic object to this symbol will go through the global
5748 offset table. The dynamic linker will use the .dynsym entry to
5749 determine the address it must put in the global offset table, so
5750 both the dynamic object and the regular object will refer to the
5751 same memory location for the variable.
5752
5753 Of course, if the symbol is referenced using SDAREL relocs, we
5754 must instead allocate it in .sbss. */
5755
5756 if (ppc_elf_hash_entry (h)->has_sda_refs)
5757 s = htab->dynsbss;
5758 else
5759 s = htab->dynbss;
5760 BFD_ASSERT (s != NULL);
5761
5762 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5763 copy the initial value out of the dynamic object and into the
5764 runtime process image. We need to remember the offset into the
5765 .rela.bss section we are going to use. */
5766 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5767 {
5768 asection *srel;
5769
5770 if (ppc_elf_hash_entry (h)->has_sda_refs)
5771 srel = htab->relsbss;
5772 else
5773 srel = htab->relbss;
5774 BFD_ASSERT (srel != NULL);
5775 srel->size += sizeof (Elf32_External_Rela);
5776 h->needs_copy = 1;
5777 }
5778
5779 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5780 }
5781 \f
5782 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5783 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5784 specifying the addend on the plt relocation. For -fpic code, the sym
5785 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5786 xxxxxxxx.got2.plt_pic32.<callee>. */
5787
5788 static bfd_boolean
5789 add_stub_sym (struct plt_entry *ent,
5790 struct elf_link_hash_entry *h,
5791 struct bfd_link_info *info)
5792 {
5793 struct elf_link_hash_entry *sh;
5794 size_t len1, len2, len3;
5795 char *name;
5796 const char *stub;
5797 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5798
5799 if (bfd_link_pic (info))
5800 stub = ".plt_pic32.";
5801 else
5802 stub = ".plt_call32.";
5803
5804 len1 = strlen (h->root.root.string);
5805 len2 = strlen (stub);
5806 len3 = 0;
5807 if (ent->sec)
5808 len3 = strlen (ent->sec->name);
5809 name = bfd_malloc (len1 + len2 + len3 + 9);
5810 if (name == NULL)
5811 return FALSE;
5812 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5813 if (ent->sec)
5814 memcpy (name + 8, ent->sec->name, len3);
5815 memcpy (name + 8 + len3, stub, len2);
5816 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5817 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5818 if (sh == NULL)
5819 return FALSE;
5820 if (sh->root.type == bfd_link_hash_new)
5821 {
5822 sh->root.type = bfd_link_hash_defined;
5823 sh->root.u.def.section = htab->glink;
5824 sh->root.u.def.value = ent->glink_offset;
5825 sh->ref_regular = 1;
5826 sh->def_regular = 1;
5827 sh->ref_regular_nonweak = 1;
5828 sh->forced_local = 1;
5829 sh->non_elf = 0;
5830 sh->root.linker_def = 1;
5831 }
5832 return TRUE;
5833 }
5834
5835 /* Allocate NEED contiguous space in .got, and return the offset.
5836 Handles allocation of the got header when crossing 32k. */
5837
5838 static bfd_vma
5839 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5840 {
5841 bfd_vma where;
5842 unsigned int max_before_header;
5843
5844 if (htab->plt_type == PLT_VXWORKS)
5845 {
5846 where = htab->got->size;
5847 htab->got->size += need;
5848 }
5849 else
5850 {
5851 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5852 if (need <= htab->got_gap)
5853 {
5854 where = max_before_header - htab->got_gap;
5855 htab->got_gap -= need;
5856 }
5857 else
5858 {
5859 if (htab->got->size + need > max_before_header
5860 && htab->got->size <= max_before_header)
5861 {
5862 htab->got_gap = max_before_header - htab->got->size;
5863 htab->got->size = max_before_header + htab->got_header_size;
5864 }
5865 where = htab->got->size;
5866 htab->got->size += need;
5867 }
5868 }
5869 return where;
5870 }
5871
5872 /* Allocate space in associated reloc sections for dynamic relocs. */
5873
5874 static bfd_boolean
5875 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5876 {
5877 struct bfd_link_info *info = inf;
5878 struct ppc_elf_link_hash_entry *eh;
5879 struct ppc_elf_link_hash_table *htab;
5880 struct elf_dyn_relocs *p;
5881
5882 if (h->root.type == bfd_link_hash_indirect)
5883 return TRUE;
5884
5885 htab = ppc_elf_hash_table (info);
5886 if (htab->elf.dynamic_sections_created
5887 || h->type == STT_GNU_IFUNC)
5888 {
5889 struct plt_entry *ent;
5890 bfd_boolean doneone = FALSE;
5891 bfd_vma plt_offset = 0, glink_offset = 0;
5892 bfd_boolean dyn;
5893
5894 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5895 if (ent->plt.refcount > 0)
5896 {
5897 /* Make sure this symbol is output as a dynamic symbol. */
5898 if (h->dynindx == -1
5899 && !h->forced_local
5900 && !h->def_regular
5901 && htab->elf.dynamic_sections_created)
5902 {
5903 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5904 return FALSE;
5905 }
5906
5907 dyn = htab->elf.dynamic_sections_created;
5908 if (bfd_link_pic (info)
5909 || h->type == STT_GNU_IFUNC
5910 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5911 {
5912 asection *s = htab->plt;
5913 if (!dyn || h->dynindx == -1)
5914 s = htab->iplt;
5915
5916 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5917 {
5918 if (!doneone)
5919 {
5920 plt_offset = s->size;
5921 s->size += 4;
5922 }
5923 ent->plt.offset = plt_offset;
5924
5925 s = htab->glink;
5926 if (!doneone || bfd_link_pic (info))
5927 {
5928 glink_offset = s->size;
5929 s->size += GLINK_ENTRY_SIZE;
5930 if (h == htab->tls_get_addr
5931 && !htab->params->no_tls_get_addr_opt)
5932 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5933 }
5934 if (!doneone
5935 && !bfd_link_pic (info)
5936 && h->def_dynamic
5937 && !h->def_regular)
5938 {
5939 h->root.u.def.section = s;
5940 h->root.u.def.value = glink_offset;
5941 }
5942 ent->glink_offset = glink_offset;
5943
5944 if (htab->params->emit_stub_syms
5945 && !add_stub_sym (ent, h, info))
5946 return FALSE;
5947 }
5948 else
5949 {
5950 if (!doneone)
5951 {
5952 /* If this is the first .plt entry, make room
5953 for the special first entry. */
5954 if (s->size == 0)
5955 s->size += htab->plt_initial_entry_size;
5956
5957 /* The PowerPC PLT is actually composed of two
5958 parts, the first part is 2 words (for a load
5959 and a jump), and then there is a remaining
5960 word available at the end. */
5961 plt_offset = (htab->plt_initial_entry_size
5962 + (htab->plt_slot_size
5963 * ((s->size
5964 - htab->plt_initial_entry_size)
5965 / htab->plt_entry_size)));
5966
5967 /* If this symbol is not defined in a regular
5968 file, and we are not generating a shared
5969 library, then set the symbol to this location
5970 in the .plt. This is to avoid text
5971 relocations, and is required to make
5972 function pointers compare as equal between
5973 the normal executable and the shared library. */
5974 if (! bfd_link_pic (info)
5975 && h->def_dynamic
5976 && !h->def_regular)
5977 {
5978 h->root.u.def.section = s;
5979 h->root.u.def.value = plt_offset;
5980 }
5981
5982 /* Make room for this entry. */
5983 s->size += htab->plt_entry_size;
5984 /* After the 8192nd entry, room for two entries
5985 is allocated. */
5986 if (htab->plt_type == PLT_OLD
5987 && (s->size - htab->plt_initial_entry_size)
5988 / htab->plt_entry_size
5989 > PLT_NUM_SINGLE_ENTRIES)
5990 s->size += htab->plt_entry_size;
5991 }
5992 ent->plt.offset = plt_offset;
5993 }
5994
5995 /* We also need to make an entry in the .rela.plt section. */
5996 if (!doneone)
5997 {
5998 if (!htab->elf.dynamic_sections_created
5999 || h->dynindx == -1)
6000 htab->reliplt->size += sizeof (Elf32_External_Rela);
6001 else
6002 {
6003 htab->relplt->size += sizeof (Elf32_External_Rela);
6004
6005 if (htab->plt_type == PLT_VXWORKS)
6006 {
6007 /* Allocate space for the unloaded relocations. */
6008 if (!bfd_link_pic (info)
6009 && htab->elf.dynamic_sections_created)
6010 {
6011 if (ent->plt.offset
6012 == (bfd_vma) htab->plt_initial_entry_size)
6013 {
6014 htab->srelplt2->size
6015 += (sizeof (Elf32_External_Rela)
6016 * VXWORKS_PLTRESOLVE_RELOCS);
6017 }
6018
6019 htab->srelplt2->size
6020 += (sizeof (Elf32_External_Rela)
6021 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6022 }
6023
6024 /* Every PLT entry has an associated GOT entry in
6025 .got.plt. */
6026 htab->sgotplt->size += 4;
6027 }
6028 }
6029 doneone = TRUE;
6030 }
6031 }
6032 else
6033 ent->plt.offset = (bfd_vma) -1;
6034 }
6035 else
6036 ent->plt.offset = (bfd_vma) -1;
6037
6038 if (!doneone)
6039 {
6040 h->plt.plist = NULL;
6041 h->needs_plt = 0;
6042 }
6043 }
6044 else
6045 {
6046 h->plt.plist = NULL;
6047 h->needs_plt = 0;
6048 }
6049
6050 eh = (struct ppc_elf_link_hash_entry *) h;
6051 if (eh->elf.got.refcount > 0
6052 || (ELIMINATE_COPY_RELOCS
6053 && !eh->elf.def_regular
6054 && eh->elf.protected_def
6055 && eh->has_addr16_ha
6056 && eh->has_addr16_lo
6057 && htab->params->pic_fixup > 0))
6058 {
6059 bfd_boolean dyn;
6060 unsigned int need;
6061
6062 /* Make sure this symbol is output as a dynamic symbol. */
6063 if (eh->elf.dynindx == -1
6064 && !eh->elf.forced_local
6065 && eh->elf.type != STT_GNU_IFUNC
6066 && htab->elf.dynamic_sections_created)
6067 {
6068 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
6069 return FALSE;
6070 }
6071
6072 need = 0;
6073 if ((eh->tls_mask & TLS_TLS) != 0)
6074 {
6075 if ((eh->tls_mask & TLS_LD) != 0)
6076 {
6077 if (!eh->elf.def_dynamic)
6078 /* We'll just use htab->tlsld_got.offset. This should
6079 always be the case. It's a little odd if we have
6080 a local dynamic reloc against a non-local symbol. */
6081 htab->tlsld_got.refcount += 1;
6082 else
6083 need += 8;
6084 }
6085 if ((eh->tls_mask & TLS_GD) != 0)
6086 need += 8;
6087 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6088 need += 4;
6089 if ((eh->tls_mask & TLS_DTPREL) != 0)
6090 need += 4;
6091 }
6092 else
6093 need += 4;
6094 if (need == 0)
6095 eh->elf.got.offset = (bfd_vma) -1;
6096 else
6097 {
6098 eh->elf.got.offset = allocate_got (htab, need);
6099 dyn = htab->elf.dynamic_sections_created;
6100 if ((bfd_link_pic (info)
6101 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
6102 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
6103 || eh->elf.root.type != bfd_link_hash_undefweak))
6104 {
6105 asection *rsec = htab->relgot;
6106
6107 if (eh->elf.type == STT_GNU_IFUNC)
6108 rsec = htab->reliplt;
6109 /* All the entries we allocated need relocs.
6110 Except LD only needs one. */
6111 if ((eh->tls_mask & TLS_LD) != 0
6112 && eh->elf.def_dynamic)
6113 need -= 4;
6114 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6115 }
6116 }
6117 }
6118 else
6119 eh->elf.got.offset = (bfd_vma) -1;
6120
6121 if (eh->dyn_relocs == NULL
6122 || !htab->elf.dynamic_sections_created)
6123 return TRUE;
6124
6125 /* In the shared -Bsymbolic case, discard space allocated for
6126 dynamic pc-relative relocs against symbols which turn out to be
6127 defined in regular objects. For the normal shared case, discard
6128 space for relocs that have become local due to symbol visibility
6129 changes. */
6130
6131 if (bfd_link_pic (info))
6132 {
6133 /* Relocs that use pc_count are those that appear on a call insn,
6134 or certain REL relocs (see must_be_dyn_reloc) that can be
6135 generated via assembly. We want calls to protected symbols to
6136 resolve directly to the function rather than going via the plt.
6137 If people want function pointer comparisons to work as expected
6138 then they should avoid writing weird assembly. */
6139 if (SYMBOL_CALLS_LOCAL (info, h))
6140 {
6141 struct elf_dyn_relocs **pp;
6142
6143 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6144 {
6145 p->count -= p->pc_count;
6146 p->pc_count = 0;
6147 if (p->count == 0)
6148 *pp = p->next;
6149 else
6150 pp = &p->next;
6151 }
6152 }
6153
6154 if (htab->is_vxworks)
6155 {
6156 struct elf_dyn_relocs **pp;
6157
6158 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6159 {
6160 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6161 *pp = p->next;
6162 else
6163 pp = &p->next;
6164 }
6165 }
6166
6167 /* Discard relocs on undefined symbols that must be local. */
6168 if (eh->dyn_relocs != NULL
6169 && h->root.type == bfd_link_hash_undefined
6170 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6171 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6172 eh->dyn_relocs = NULL;
6173
6174 /* Also discard relocs on undefined weak syms with non-default
6175 visibility. */
6176 if (eh->dyn_relocs != NULL
6177 && h->root.type == bfd_link_hash_undefweak)
6178 {
6179 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6180 eh->dyn_relocs = NULL;
6181
6182 /* Make sure undefined weak symbols are output as a dynamic
6183 symbol in PIEs. */
6184 else if (h->dynindx == -1
6185 && !h->forced_local
6186 && !h->def_regular)
6187 {
6188 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6189 return FALSE;
6190 }
6191 }
6192 }
6193 else if (ELIMINATE_COPY_RELOCS)
6194 {
6195 /* For the non-shared case, discard space for relocs against
6196 symbols which turn out to need copy relocs or are not
6197 dynamic. */
6198
6199 if (!h->non_got_ref
6200 && !h->def_regular
6201 && !(h->protected_def
6202 && eh->has_addr16_ha
6203 && eh->has_addr16_lo
6204 && htab->params->pic_fixup > 0))
6205 {
6206 /* Make sure this symbol is output as a dynamic symbol.
6207 Undefined weak syms won't yet be marked as dynamic. */
6208 if (h->dynindx == -1
6209 && !h->forced_local)
6210 {
6211 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6212 return FALSE;
6213 }
6214
6215 /* If that succeeded, we know we'll be keeping all the
6216 relocs. */
6217 if (h->dynindx != -1)
6218 goto keep;
6219 }
6220
6221 eh->dyn_relocs = NULL;
6222
6223 keep: ;
6224 }
6225
6226 /* Finally, allocate space. */
6227 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6228 {
6229 asection *sreloc = elf_section_data (p->sec)->sreloc;
6230 if (eh->elf.type == STT_GNU_IFUNC)
6231 sreloc = htab->reliplt;
6232 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6233 }
6234
6235 return TRUE;
6236 }
6237
6238 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6239 read-only sections. */
6240
6241 static bfd_boolean
6242 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6243 {
6244 if (h->root.type == bfd_link_hash_indirect)
6245 return TRUE;
6246
6247 if (readonly_dynrelocs (h))
6248 {
6249 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6250
6251 /* Not an error, just cut short the traversal. */
6252 return FALSE;
6253 }
6254 return TRUE;
6255 }
6256
6257 static const unsigned char glink_eh_frame_cie[] =
6258 {
6259 0, 0, 0, 16, /* length. */
6260 0, 0, 0, 0, /* id. */
6261 1, /* CIE version. */
6262 'z', 'R', 0, /* Augmentation string. */
6263 4, /* Code alignment. */
6264 0x7c, /* Data alignment. */
6265 65, /* RA reg. */
6266 1, /* Augmentation size. */
6267 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6268 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6269 };
6270
6271 /* Set the sizes of the dynamic sections. */
6272
6273 static bfd_boolean
6274 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6275 struct bfd_link_info *info)
6276 {
6277 struct ppc_elf_link_hash_table *htab;
6278 asection *s;
6279 bfd_boolean relocs;
6280 bfd *ibfd;
6281
6282 #ifdef DEBUG
6283 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6284 #endif
6285
6286 htab = ppc_elf_hash_table (info);
6287 BFD_ASSERT (htab->elf.dynobj != NULL);
6288
6289 if (elf_hash_table (info)->dynamic_sections_created)
6290 {
6291 /* Set the contents of the .interp section to the interpreter. */
6292 if (bfd_link_executable (info) && !info->nointerp)
6293 {
6294 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6295 BFD_ASSERT (s != NULL);
6296 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6297 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6298 }
6299 }
6300
6301 if (htab->plt_type == PLT_OLD)
6302 htab->got_header_size = 16;
6303 else if (htab->plt_type == PLT_NEW)
6304 htab->got_header_size = 12;
6305
6306 /* Set up .got offsets for local syms, and space for local dynamic
6307 relocs. */
6308 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6309 {
6310 bfd_signed_vma *local_got;
6311 bfd_signed_vma *end_local_got;
6312 struct plt_entry **local_plt;
6313 struct plt_entry **end_local_plt;
6314 char *lgot_masks;
6315 bfd_size_type locsymcount;
6316 Elf_Internal_Shdr *symtab_hdr;
6317
6318 if (!is_ppc_elf (ibfd))
6319 continue;
6320
6321 for (s = ibfd->sections; s != NULL; s = s->next)
6322 {
6323 struct ppc_dyn_relocs *p;
6324
6325 for (p = ((struct ppc_dyn_relocs *)
6326 elf_section_data (s)->local_dynrel);
6327 p != NULL;
6328 p = p->next)
6329 {
6330 if (!bfd_is_abs_section (p->sec)
6331 && bfd_is_abs_section (p->sec->output_section))
6332 {
6333 /* Input section has been discarded, either because
6334 it is a copy of a linkonce section or due to
6335 linker script /DISCARD/, so we'll be discarding
6336 the relocs too. */
6337 }
6338 else if (htab->is_vxworks
6339 && strcmp (p->sec->output_section->name,
6340 ".tls_vars") == 0)
6341 {
6342 /* Relocations in vxworks .tls_vars sections are
6343 handled specially by the loader. */
6344 }
6345 else if (p->count != 0)
6346 {
6347 asection *sreloc = elf_section_data (p->sec)->sreloc;
6348 if (p->ifunc)
6349 sreloc = htab->reliplt;
6350 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6351 if ((p->sec->output_section->flags
6352 & (SEC_READONLY | SEC_ALLOC))
6353 == (SEC_READONLY | SEC_ALLOC))
6354 info->flags |= DF_TEXTREL;
6355 }
6356 }
6357 }
6358
6359 local_got = elf_local_got_refcounts (ibfd);
6360 if (!local_got)
6361 continue;
6362
6363 symtab_hdr = &elf_symtab_hdr (ibfd);
6364 locsymcount = symtab_hdr->sh_info;
6365 end_local_got = local_got + locsymcount;
6366 local_plt = (struct plt_entry **) end_local_got;
6367 end_local_plt = local_plt + locsymcount;
6368 lgot_masks = (char *) end_local_plt;
6369
6370 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6371 if (*local_got > 0)
6372 {
6373 unsigned int need = 0;
6374 if ((*lgot_masks & TLS_TLS) != 0)
6375 {
6376 if ((*lgot_masks & TLS_GD) != 0)
6377 need += 8;
6378 if ((*lgot_masks & TLS_LD) != 0)
6379 htab->tlsld_got.refcount += 1;
6380 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6381 need += 4;
6382 if ((*lgot_masks & TLS_DTPREL) != 0)
6383 need += 4;
6384 }
6385 else
6386 need += 4;
6387 if (need == 0)
6388 *local_got = (bfd_vma) -1;
6389 else
6390 {
6391 *local_got = allocate_got (htab, need);
6392 if (bfd_link_pic (info))
6393 {
6394 asection *srel = htab->relgot;
6395 if ((*lgot_masks & PLT_IFUNC) != 0)
6396 srel = htab->reliplt;
6397 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6398 }
6399 }
6400 }
6401 else
6402 *local_got = (bfd_vma) -1;
6403
6404 if (htab->is_vxworks)
6405 continue;
6406
6407 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6408 for (; local_plt < end_local_plt; ++local_plt)
6409 {
6410 struct plt_entry *ent;
6411 bfd_boolean doneone = FALSE;
6412 bfd_vma plt_offset = 0, glink_offset = 0;
6413
6414 for (ent = *local_plt; ent != NULL; ent = ent->next)
6415 if (ent->plt.refcount > 0)
6416 {
6417 s = htab->iplt;
6418
6419 if (!doneone)
6420 {
6421 plt_offset = s->size;
6422 s->size += 4;
6423 }
6424 ent->plt.offset = plt_offset;
6425
6426 s = htab->glink;
6427 if (!doneone || bfd_link_pic (info))
6428 {
6429 glink_offset = s->size;
6430 s->size += GLINK_ENTRY_SIZE;
6431 }
6432 ent->glink_offset = glink_offset;
6433
6434 if (!doneone)
6435 {
6436 htab->reliplt->size += sizeof (Elf32_External_Rela);
6437 doneone = TRUE;
6438 }
6439 }
6440 else
6441 ent->plt.offset = (bfd_vma) -1;
6442 }
6443 }
6444
6445 /* Allocate space for global sym dynamic relocs. */
6446 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6447
6448 if (htab->tlsld_got.refcount > 0)
6449 {
6450 htab->tlsld_got.offset = allocate_got (htab, 8);
6451 if (bfd_link_pic (info))
6452 htab->relgot->size += sizeof (Elf32_External_Rela);
6453 }
6454 else
6455 htab->tlsld_got.offset = (bfd_vma) -1;
6456
6457 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6458 {
6459 unsigned int g_o_t = 32768;
6460
6461 /* If we haven't allocated the header, do so now. When we get here,
6462 for old plt/got the got size will be 0 to 32764 (not allocated),
6463 or 32780 to 65536 (header allocated). For new plt/got, the
6464 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6465 if (htab->got->size <= 32768)
6466 {
6467 g_o_t = htab->got->size;
6468 if (htab->plt_type == PLT_OLD)
6469 g_o_t += 4;
6470 htab->got->size += htab->got_header_size;
6471 }
6472
6473 htab->elf.hgot->root.u.def.value = g_o_t;
6474 }
6475 if (bfd_link_pic (info))
6476 {
6477 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6478
6479 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6480 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6481 }
6482 if (info->emitrelocations)
6483 {
6484 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6485
6486 if (sda != NULL && sda->ref_regular)
6487 sda->root.u.def.section->flags |= SEC_KEEP;
6488 sda = htab->sdata[1].sym;
6489 if (sda != NULL && sda->ref_regular)
6490 sda->root.u.def.section->flags |= SEC_KEEP;
6491 }
6492
6493 if (htab->glink != NULL
6494 && htab->glink->size != 0
6495 && htab->elf.dynamic_sections_created)
6496 {
6497 htab->glink_pltresolve = htab->glink->size;
6498 /* Space for the branch table. ??? We don't need entries for
6499 non-dynamic symbols in this table. This case can arise with
6500 static ifuncs or forced local ifuncs. */
6501 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6502 /* Pad out to align the start of PLTresolve. */
6503 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6504 ? 63 : 15);
6505 htab->glink->size += GLINK_PLTRESOLVE;
6506
6507 if (htab->params->emit_stub_syms)
6508 {
6509 struct elf_link_hash_entry *sh;
6510 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6511 TRUE, FALSE, FALSE);
6512 if (sh == NULL)
6513 return FALSE;
6514 if (sh->root.type == bfd_link_hash_new)
6515 {
6516 sh->root.type = bfd_link_hash_defined;
6517 sh->root.u.def.section = htab->glink;
6518 sh->root.u.def.value = htab->glink_pltresolve;
6519 sh->ref_regular = 1;
6520 sh->def_regular = 1;
6521 sh->ref_regular_nonweak = 1;
6522 sh->forced_local = 1;
6523 sh->non_elf = 0;
6524 sh->root.linker_def = 1;
6525 }
6526 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6527 TRUE, FALSE, FALSE);
6528 if (sh == NULL)
6529 return FALSE;
6530 if (sh->root.type == bfd_link_hash_new)
6531 {
6532 sh->root.type = bfd_link_hash_defined;
6533 sh->root.u.def.section = htab->glink;
6534 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6535 sh->ref_regular = 1;
6536 sh->def_regular = 1;
6537 sh->ref_regular_nonweak = 1;
6538 sh->forced_local = 1;
6539 sh->non_elf = 0;
6540 sh->root.linker_def = 1;
6541 }
6542 }
6543 }
6544
6545 if (htab->glink != NULL
6546 && htab->glink->size != 0
6547 && htab->glink_eh_frame != NULL
6548 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6549 && _bfd_elf_eh_frame_present (info))
6550 {
6551 s = htab->glink_eh_frame;
6552 s->size = sizeof (glink_eh_frame_cie) + 20;
6553 if (bfd_link_pic (info))
6554 {
6555 s->size += 4;
6556 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6557 s->size += 4;
6558 }
6559 }
6560
6561 /* We've now determined the sizes of the various dynamic sections.
6562 Allocate memory for them. */
6563 relocs = FALSE;
6564 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6565 {
6566 bfd_boolean strip_section = TRUE;
6567
6568 if ((s->flags & SEC_LINKER_CREATED) == 0)
6569 continue;
6570
6571 if (s == htab->plt
6572 || s == htab->got)
6573 {
6574 /* We'd like to strip these sections if they aren't needed, but if
6575 we've exported dynamic symbols from them we must leave them.
6576 It's too late to tell BFD to get rid of the symbols. */
6577 if (htab->elf.hplt != NULL)
6578 strip_section = FALSE;
6579 /* Strip this section if we don't need it; see the
6580 comment below. */
6581 }
6582 else if (s == htab->iplt
6583 || s == htab->glink
6584 || s == htab->glink_eh_frame
6585 || s == htab->sgotplt
6586 || s == htab->sbss
6587 || s == htab->dynbss
6588 || s == htab->dynsbss)
6589 {
6590 /* Strip these too. */
6591 }
6592 else if (s == htab->sdata[0].section
6593 || s == htab->sdata[1].section)
6594 {
6595 strip_section = (s->flags & SEC_KEEP) == 0;
6596 }
6597 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6598 ".rela"))
6599 {
6600 if (s->size != 0)
6601 {
6602 /* Remember whether there are any relocation sections. */
6603 relocs = TRUE;
6604
6605 /* We use the reloc_count field as a counter if we need
6606 to copy relocs into the output file. */
6607 s->reloc_count = 0;
6608 }
6609 }
6610 else
6611 {
6612 /* It's not one of our sections, so don't allocate space. */
6613 continue;
6614 }
6615
6616 if (s->size == 0 && strip_section)
6617 {
6618 /* If we don't need this section, strip it from the
6619 output file. This is mostly to handle .rela.bss and
6620 .rela.plt. We must create both sections in
6621 create_dynamic_sections, because they must be created
6622 before the linker maps input sections to output
6623 sections. The linker does that before
6624 adjust_dynamic_symbol is called, and it is that
6625 function which decides whether anything needs to go
6626 into these sections. */
6627 s->flags |= SEC_EXCLUDE;
6628 continue;
6629 }
6630
6631 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6632 continue;
6633
6634 /* Allocate memory for the section contents. */
6635 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6636 if (s->contents == NULL)
6637 return FALSE;
6638 }
6639
6640 if (htab->elf.dynamic_sections_created)
6641 {
6642 /* Add some entries to the .dynamic section. We fill in the
6643 values later, in ppc_elf_finish_dynamic_sections, but we
6644 must add the entries now so that we get the correct size for
6645 the .dynamic section. The DT_DEBUG entry is filled in by the
6646 dynamic linker and used by the debugger. */
6647 #define add_dynamic_entry(TAG, VAL) \
6648 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6649
6650 if (bfd_link_executable (info))
6651 {
6652 if (!add_dynamic_entry (DT_DEBUG, 0))
6653 return FALSE;
6654 }
6655
6656 if (htab->plt != NULL && htab->plt->size != 0)
6657 {
6658 if (!add_dynamic_entry (DT_PLTGOT, 0)
6659 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6660 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6661 || !add_dynamic_entry (DT_JMPREL, 0))
6662 return FALSE;
6663 }
6664
6665 if (htab->plt_type == PLT_NEW
6666 && htab->glink != NULL
6667 && htab->glink->size != 0)
6668 {
6669 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6670 return FALSE;
6671 if (!htab->params->no_tls_get_addr_opt
6672 && htab->tls_get_addr != NULL
6673 && htab->tls_get_addr->plt.plist != NULL
6674 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6675 return FALSE;
6676 }
6677
6678 if (relocs)
6679 {
6680 if (!add_dynamic_entry (DT_RELA, 0)
6681 || !add_dynamic_entry (DT_RELASZ, 0)
6682 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6683 return FALSE;
6684 }
6685
6686 /* If any dynamic relocs apply to a read-only section, then we
6687 need a DT_TEXTREL entry. */
6688 if ((info->flags & DF_TEXTREL) == 0)
6689 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6690 info);
6691
6692 if ((info->flags & DF_TEXTREL) != 0)
6693 {
6694 if (!add_dynamic_entry (DT_TEXTREL, 0))
6695 return FALSE;
6696 }
6697 if (htab->is_vxworks
6698 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6699 return FALSE;
6700 }
6701 #undef add_dynamic_entry
6702
6703 if (htab->glink_eh_frame != NULL
6704 && htab->glink_eh_frame->contents != NULL)
6705 {
6706 unsigned char *p = htab->glink_eh_frame->contents;
6707 bfd_vma val;
6708
6709 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6710 /* CIE length (rewrite in case little-endian). */
6711 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6712 p += sizeof (glink_eh_frame_cie);
6713 /* FDE length. */
6714 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6715 bfd_put_32 (htab->elf.dynobj, val, p);
6716 p += 4;
6717 /* CIE pointer. */
6718 val = p - htab->glink_eh_frame->contents;
6719 bfd_put_32 (htab->elf.dynobj, val, p);
6720 p += 4;
6721 /* Offset to .glink. Set later. */
6722 p += 4;
6723 /* .glink size. */
6724 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6725 p += 4;
6726 /* Augmentation. */
6727 p += 1;
6728
6729 if (bfd_link_pic (info)
6730 && htab->elf.dynamic_sections_created)
6731 {
6732 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6733 if (adv < 64)
6734 *p++ = DW_CFA_advance_loc + adv;
6735 else if (adv < 256)
6736 {
6737 *p++ = DW_CFA_advance_loc1;
6738 *p++ = adv;
6739 }
6740 else if (adv < 65536)
6741 {
6742 *p++ = DW_CFA_advance_loc2;
6743 bfd_put_16 (htab->elf.dynobj, adv, p);
6744 p += 2;
6745 }
6746 else
6747 {
6748 *p++ = DW_CFA_advance_loc4;
6749 bfd_put_32 (htab->elf.dynobj, adv, p);
6750 p += 4;
6751 }
6752 *p++ = DW_CFA_register;
6753 *p++ = 65;
6754 p++;
6755 *p++ = DW_CFA_advance_loc + 4;
6756 *p++ = DW_CFA_restore_extended;
6757 *p++ = 65;
6758 }
6759 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6760 == htab->glink_eh_frame->size);
6761 }
6762
6763 return TRUE;
6764 }
6765
6766 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6767 if it looks like nothing is using them. */
6768
6769 static void
6770 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6771 {
6772 struct elf_link_hash_entry *sda = lsect->sym;
6773
6774 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6775 {
6776 asection *s;
6777
6778 s = bfd_get_section_by_name (output_bfd, lsect->name);
6779 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6780 {
6781 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6782 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6783 {
6784 sda->def_regular = 0;
6785 /* This is somewhat magic. See elf_link_output_extsym. */
6786 sda->ref_dynamic = 1;
6787 sda->forced_local = 0;
6788 }
6789 }
6790 }
6791 }
6792
6793 void
6794 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6795 {
6796 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6797
6798 if (htab != NULL)
6799 {
6800 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6801 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6802 }
6803 }
6804
6805
6806 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6807
6808 static bfd_boolean
6809 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6810 {
6811 if (h->plt.plist != NULL
6812 && !h->def_regular
6813 && (!h->pointer_equality_needed
6814 || !h->ref_regular_nonweak))
6815 return FALSE;
6816
6817 return _bfd_elf_hash_symbol (h);
6818 }
6819 \f
6820 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6821
6822 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6823 used for some functions that are allowed to break the ABI). */
6824 static const int shared_stub_entry[] =
6825 {
6826 0x7c0802a6, /* mflr 0 */
6827 0x429f0005, /* bcl 20, 31, .Lxxx */
6828 0x7d8802a6, /* mflr 12 */
6829 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6830 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6831 0x7c0803a6, /* mtlr 0 */
6832 0x7d8903a6, /* mtctr 12 */
6833 0x4e800420, /* bctr */
6834 };
6835
6836 static const int stub_entry[] =
6837 {
6838 0x3d800000, /* lis 12,xxx@ha */
6839 0x398c0000, /* addi 12,12,xxx@l */
6840 0x7d8903a6, /* mtctr 12 */
6841 0x4e800420, /* bctr */
6842 };
6843
6844 struct ppc_elf_relax_info
6845 {
6846 unsigned int workaround_size;
6847 unsigned int picfixup_size;
6848 };
6849
6850 /* This function implements long branch trampolines, and the ppc476
6851 icache bug workaround. Any section needing trampolines or patch
6852 space for the workaround has its size extended so that we can
6853 add trampolines at the end of the section. */
6854
6855 static bfd_boolean
6856 ppc_elf_relax_section (bfd *abfd,
6857 asection *isec,
6858 struct bfd_link_info *link_info,
6859 bfd_boolean *again)
6860 {
6861 struct one_branch_fixup
6862 {
6863 struct one_branch_fixup *next;
6864 asection *tsec;
6865 /* Final link, can use the symbol offset. For a
6866 relocatable link we use the symbol's index. */
6867 bfd_vma toff;
6868 bfd_vma trampoff;
6869 };
6870
6871 Elf_Internal_Shdr *symtab_hdr;
6872 bfd_byte *contents = NULL;
6873 Elf_Internal_Sym *isymbuf = NULL;
6874 Elf_Internal_Rela *internal_relocs = NULL;
6875 Elf_Internal_Rela *irel, *irelend = NULL;
6876 struct one_branch_fixup *branch_fixups = NULL;
6877 struct ppc_elf_relax_info *relax_info = NULL;
6878 unsigned changes = 0;
6879 bfd_boolean workaround_change;
6880 struct ppc_elf_link_hash_table *htab;
6881 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6882 asection *got2;
6883 bfd_boolean maybe_pasted;
6884
6885 *again = FALSE;
6886
6887 /* No need to do anything with non-alloc or non-code sections. */
6888 if ((isec->flags & SEC_ALLOC) == 0
6889 || (isec->flags & SEC_CODE) == 0
6890 || (isec->flags & SEC_LINKER_CREATED) != 0
6891 || isec->size < 4)
6892 return TRUE;
6893
6894 /* We cannot represent the required PIC relocs in the output, so don't
6895 do anything. The linker doesn't support mixing -shared and -r
6896 anyway. */
6897 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6898 return TRUE;
6899
6900 htab = ppc_elf_hash_table (link_info);
6901 if (htab == NULL)
6902 return TRUE;
6903
6904 isec->size = (isec->size + 3) & -4;
6905 if (isec->rawsize == 0)
6906 isec->rawsize = isec->size;
6907 trampbase = isec->size;
6908
6909 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6910 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6911 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6912
6913 if (htab->params->ppc476_workaround
6914 || htab->params->pic_fixup > 0)
6915 {
6916 if (elf_section_data (isec)->sec_info == NULL)
6917 {
6918 elf_section_data (isec)->sec_info
6919 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6920 if (elf_section_data (isec)->sec_info == NULL)
6921 return FALSE;
6922 }
6923 relax_info = elf_section_data (isec)->sec_info;
6924 trampbase -= relax_info->workaround_size;
6925 }
6926
6927 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6928 || strcmp (isec->output_section->name, ".fini") == 0);
6929 /* Space for a branch around any trampolines. */
6930 trampoff = trampbase;
6931 if (maybe_pasted && trampbase == isec->rawsize)
6932 trampoff += 4;
6933
6934 symtab_hdr = &elf_symtab_hdr (abfd);
6935 picfixup_size = 0;
6936 if (htab->params->branch_trampolines
6937 || htab->params->pic_fixup > 0)
6938 {
6939 /* Get a copy of the native relocations. */
6940 if (isec->reloc_count != 0)
6941 {
6942 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6943 link_info->keep_memory);
6944 if (internal_relocs == NULL)
6945 goto error_return;
6946 }
6947
6948 got2 = bfd_get_section_by_name (abfd, ".got2");
6949
6950 irelend = internal_relocs + isec->reloc_count;
6951 for (irel = internal_relocs; irel < irelend; irel++)
6952 {
6953 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6954 bfd_vma toff, roff;
6955 asection *tsec;
6956 struct one_branch_fixup *f;
6957 size_t insn_offset = 0;
6958 bfd_vma max_branch_offset = 0, val;
6959 bfd_byte *hit_addr;
6960 unsigned long t0;
6961 struct elf_link_hash_entry *h;
6962 struct plt_entry **plist;
6963 unsigned char sym_type;
6964
6965 switch (r_type)
6966 {
6967 case R_PPC_REL24:
6968 case R_PPC_LOCAL24PC:
6969 case R_PPC_PLTREL24:
6970 max_branch_offset = 1 << 25;
6971 break;
6972
6973 case R_PPC_REL14:
6974 case R_PPC_REL14_BRTAKEN:
6975 case R_PPC_REL14_BRNTAKEN:
6976 max_branch_offset = 1 << 15;
6977 break;
6978
6979 case R_PPC_ADDR16_HA:
6980 if (htab->params->pic_fixup > 0)
6981 break;
6982 continue;
6983
6984 default:
6985 continue;
6986 }
6987
6988 /* Get the value of the symbol referred to by the reloc. */
6989 h = NULL;
6990 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6991 {
6992 /* A local symbol. */
6993 Elf_Internal_Sym *isym;
6994
6995 /* Read this BFD's local symbols. */
6996 if (isymbuf == NULL)
6997 {
6998 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6999 if (isymbuf == NULL)
7000 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7001 symtab_hdr->sh_info, 0,
7002 NULL, NULL, NULL);
7003 if (isymbuf == 0)
7004 goto error_return;
7005 }
7006 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7007 if (isym->st_shndx == SHN_UNDEF)
7008 tsec = bfd_und_section_ptr;
7009 else if (isym->st_shndx == SHN_ABS)
7010 tsec = bfd_abs_section_ptr;
7011 else if (isym->st_shndx == SHN_COMMON)
7012 tsec = bfd_com_section_ptr;
7013 else
7014 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7015
7016 toff = isym->st_value;
7017 sym_type = ELF_ST_TYPE (isym->st_info);
7018 }
7019 else
7020 {
7021 /* Global symbol handling. */
7022 unsigned long indx;
7023
7024 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7025 h = elf_sym_hashes (abfd)[indx];
7026
7027 while (h->root.type == bfd_link_hash_indirect
7028 || h->root.type == bfd_link_hash_warning)
7029 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7030
7031 if (h->root.type == bfd_link_hash_defined
7032 || h->root.type == bfd_link_hash_defweak)
7033 {
7034 tsec = h->root.u.def.section;
7035 toff = h->root.u.def.value;
7036 }
7037 else if (h->root.type == bfd_link_hash_undefined
7038 || h->root.type == bfd_link_hash_undefweak)
7039 {
7040 tsec = bfd_und_section_ptr;
7041 toff = bfd_link_relocatable (link_info) ? indx : 0;
7042 }
7043 else
7044 continue;
7045
7046 /* If this branch is to __tls_get_addr then we may later
7047 optimise away the call. We won't be needing a long-
7048 branch stub in that case. */
7049 if (bfd_link_executable (link_info)
7050 && h == htab->tls_get_addr
7051 && irel != internal_relocs)
7052 {
7053 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7054 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7055 unsigned int tls_mask = 0;
7056
7057 /* The previous reloc should be one of R_PPC_TLSGD or
7058 R_PPC_TLSLD, or for older object files, a reloc
7059 on the __tls_get_addr arg setup insn. Get tls
7060 mask bits from the symbol on that reloc. */
7061 if (t_symndx < symtab_hdr->sh_info)
7062 {
7063 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7064
7065 if (local_got_offsets != NULL)
7066 {
7067 struct plt_entry **local_plt = (struct plt_entry **)
7068 (local_got_offsets + symtab_hdr->sh_info);
7069 char *lgot_masks = (char *)
7070 (local_plt + symtab_hdr->sh_info);
7071 tls_mask = lgot_masks[t_symndx];
7072 }
7073 }
7074 else
7075 {
7076 struct elf_link_hash_entry *th
7077 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7078
7079 while (th->root.type == bfd_link_hash_indirect
7080 || th->root.type == bfd_link_hash_warning)
7081 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7082
7083 tls_mask
7084 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7085 }
7086
7087 /* The mask bits tell us if the call will be
7088 optimised away. */
7089 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7090 && (t_rtype == R_PPC_TLSGD
7091 || t_rtype == R_PPC_GOT_TLSGD16
7092 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7093 continue;
7094 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7095 && (t_rtype == R_PPC_TLSLD
7096 || t_rtype == R_PPC_GOT_TLSLD16
7097 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7098 continue;
7099 }
7100
7101 sym_type = h->type;
7102 }
7103
7104 if (r_type == R_PPC_ADDR16_HA)
7105 {
7106 if (h != NULL
7107 && !h->def_regular
7108 && h->protected_def
7109 && ppc_elf_hash_entry (h)->has_addr16_ha
7110 && ppc_elf_hash_entry (h)->has_addr16_lo)
7111 picfixup_size += 12;
7112 continue;
7113 }
7114
7115 /* The condition here under which we call find_plt_ent must
7116 match that in relocate_section. If we call find_plt_ent here
7117 but not in relocate_section, or vice versa, then the branch
7118 destination used here may be incorrect. */
7119 plist = NULL;
7120 if (h != NULL)
7121 {
7122 /* We know is_branch_reloc (r_type) is true. */
7123 if (h->type == STT_GNU_IFUNC
7124 || r_type == R_PPC_PLTREL24)
7125 plist = &h->plt.plist;
7126 }
7127 else if (sym_type == STT_GNU_IFUNC
7128 && elf_local_got_offsets (abfd) != NULL)
7129 {
7130 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7131 struct plt_entry **local_plt = (struct plt_entry **)
7132 (local_got_offsets + symtab_hdr->sh_info);
7133 plist = local_plt + ELF32_R_SYM (irel->r_info);
7134 }
7135 if (plist != NULL)
7136 {
7137 bfd_vma addend = 0;
7138 struct plt_entry *ent;
7139
7140 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7141 addend = irel->r_addend;
7142 ent = find_plt_ent (plist, got2, addend);
7143 if (ent != NULL)
7144 {
7145 if (htab->plt_type == PLT_NEW
7146 || h == NULL
7147 || !htab->elf.dynamic_sections_created
7148 || h->dynindx == -1)
7149 {
7150 tsec = htab->glink;
7151 toff = ent->glink_offset;
7152 }
7153 else
7154 {
7155 tsec = htab->plt;
7156 toff = ent->plt.offset;
7157 }
7158 }
7159 }
7160
7161 /* If the branch and target are in the same section, you have
7162 no hope of adding stubs. We'll error out later should the
7163 branch overflow. */
7164 if (tsec == isec)
7165 continue;
7166
7167 /* There probably isn't any reason to handle symbols in
7168 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7169 attribute for a code section, and we are only looking at
7170 branches. However, implement it correctly here as a
7171 reference for other target relax_section functions. */
7172 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7173 {
7174 /* At this stage in linking, no SEC_MERGE symbol has been
7175 adjusted, so all references to such symbols need to be
7176 passed through _bfd_merged_section_offset. (Later, in
7177 relocate_section, all SEC_MERGE symbols *except* for
7178 section symbols have been adjusted.)
7179
7180 gas may reduce relocations against symbols in SEC_MERGE
7181 sections to a relocation against the section symbol when
7182 the original addend was zero. When the reloc is against
7183 a section symbol we should include the addend in the
7184 offset passed to _bfd_merged_section_offset, since the
7185 location of interest is the original symbol. On the
7186 other hand, an access to "sym+addend" where "sym" is not
7187 a section symbol should not include the addend; Such an
7188 access is presumed to be an offset from "sym"; The
7189 location of interest is just "sym". */
7190 if (sym_type == STT_SECTION)
7191 toff += irel->r_addend;
7192
7193 toff
7194 = _bfd_merged_section_offset (abfd, &tsec,
7195 elf_section_data (tsec)->sec_info,
7196 toff);
7197
7198 if (sym_type != STT_SECTION)
7199 toff += irel->r_addend;
7200 }
7201 /* PLTREL24 addends are special. */
7202 else if (r_type != R_PPC_PLTREL24)
7203 toff += irel->r_addend;
7204
7205 /* Attempted -shared link of non-pic code loses. */
7206 if ((!bfd_link_relocatable (link_info)
7207 && tsec == bfd_und_section_ptr)
7208 || tsec->output_section == NULL
7209 || (tsec->owner != NULL
7210 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7211 continue;
7212
7213 roff = irel->r_offset;
7214
7215 /* If the branch is in range, no need to do anything. */
7216 if (tsec != bfd_und_section_ptr
7217 && (!bfd_link_relocatable (link_info)
7218 /* A relocatable link may have sections moved during
7219 final link, so do not presume they remain in range. */
7220 || tsec->output_section == isec->output_section))
7221 {
7222 bfd_vma symaddr, reladdr;
7223
7224 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7225 reladdr = isec->output_section->vma + isec->output_offset + roff;
7226 if (symaddr - reladdr + max_branch_offset
7227 < 2 * max_branch_offset)
7228 continue;
7229 }
7230
7231 /* Look for an existing fixup to this address. */
7232 for (f = branch_fixups; f ; f = f->next)
7233 if (f->tsec == tsec && f->toff == toff)
7234 break;
7235
7236 if (f == NULL)
7237 {
7238 size_t size;
7239 unsigned long stub_rtype;
7240
7241 val = trampoff - roff;
7242 if (val >= max_branch_offset)
7243 /* Oh dear, we can't reach a trampoline. Don't try to add
7244 one. We'll report an error later. */
7245 continue;
7246
7247 if (bfd_link_pic (link_info))
7248 {
7249 size = 4 * ARRAY_SIZE (shared_stub_entry);
7250 insn_offset = 12;
7251 }
7252 else
7253 {
7254 size = 4 * ARRAY_SIZE (stub_entry);
7255 insn_offset = 0;
7256 }
7257 stub_rtype = R_PPC_RELAX;
7258 if (tsec == htab->plt
7259 || tsec == htab->glink)
7260 {
7261 stub_rtype = R_PPC_RELAX_PLT;
7262 if (r_type == R_PPC_PLTREL24)
7263 stub_rtype = R_PPC_RELAX_PLTREL24;
7264 }
7265
7266 /* Hijack the old relocation. Since we need two
7267 relocations for this use a "composite" reloc. */
7268 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7269 stub_rtype);
7270 irel->r_offset = trampoff + insn_offset;
7271 if (r_type == R_PPC_PLTREL24
7272 && stub_rtype != R_PPC_RELAX_PLTREL24)
7273 irel->r_addend = 0;
7274
7275 /* Record the fixup so we don't do it again this section. */
7276 f = bfd_malloc (sizeof (*f));
7277 f->next = branch_fixups;
7278 f->tsec = tsec;
7279 f->toff = toff;
7280 f->trampoff = trampoff;
7281 branch_fixups = f;
7282
7283 trampoff += size;
7284 changes++;
7285 }
7286 else
7287 {
7288 val = f->trampoff - roff;
7289 if (val >= max_branch_offset)
7290 continue;
7291
7292 /* Nop out the reloc, since we're finalizing things here. */
7293 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7294 }
7295
7296 /* Get the section contents. */
7297 if (contents == NULL)
7298 {
7299 /* Get cached copy if it exists. */
7300 if (elf_section_data (isec)->this_hdr.contents != NULL)
7301 contents = elf_section_data (isec)->this_hdr.contents;
7302 /* Go get them off disk. */
7303 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7304 goto error_return;
7305 }
7306
7307 /* Fix up the existing branch to hit the trampoline. */
7308 hit_addr = contents + roff;
7309 switch (r_type)
7310 {
7311 case R_PPC_REL24:
7312 case R_PPC_LOCAL24PC:
7313 case R_PPC_PLTREL24:
7314 t0 = bfd_get_32 (abfd, hit_addr);
7315 t0 &= ~0x3fffffc;
7316 t0 |= val & 0x3fffffc;
7317 bfd_put_32 (abfd, t0, hit_addr);
7318 break;
7319
7320 case R_PPC_REL14:
7321 case R_PPC_REL14_BRTAKEN:
7322 case R_PPC_REL14_BRNTAKEN:
7323 t0 = bfd_get_32 (abfd, hit_addr);
7324 t0 &= ~0xfffc;
7325 t0 |= val & 0xfffc;
7326 bfd_put_32 (abfd, t0, hit_addr);
7327 break;
7328 }
7329 }
7330
7331 while (branch_fixups != NULL)
7332 {
7333 struct one_branch_fixup *f = branch_fixups;
7334 branch_fixups = branch_fixups->next;
7335 free (f);
7336 }
7337 }
7338
7339 workaround_change = FALSE;
7340 newsize = trampoff;
7341 if (htab->params->ppc476_workaround
7342 && (!bfd_link_relocatable (link_info)
7343 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7344 {
7345 bfd_vma addr, end_addr;
7346 unsigned int crossings;
7347 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7348
7349 addr = isec->output_section->vma + isec->output_offset;
7350 end_addr = addr + trampoff;
7351 addr &= -pagesize;
7352 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7353 if (crossings != 0)
7354 {
7355 /* Keep space aligned, to ensure the patch code itself does
7356 not cross a page. Don't decrease size calculated on a
7357 previous pass as otherwise we might never settle on a layout. */
7358 newsize = 15 - ((end_addr - 1) & 15);
7359 newsize += crossings * 16;
7360 if (relax_info->workaround_size < newsize)
7361 {
7362 relax_info->workaround_size = newsize;
7363 workaround_change = TRUE;
7364 }
7365 /* Ensure relocate_section is called. */
7366 isec->flags |= SEC_RELOC;
7367 }
7368 newsize = trampoff + relax_info->workaround_size;
7369 }
7370
7371 if (htab->params->pic_fixup > 0)
7372 {
7373 picfixup_size -= relax_info->picfixup_size;
7374 if (picfixup_size != 0)
7375 relax_info->picfixup_size += picfixup_size;
7376 newsize += relax_info->picfixup_size;
7377 }
7378
7379 if (changes != 0 || picfixup_size != 0 || workaround_change)
7380 isec->size = newsize;
7381
7382 if (isymbuf != NULL
7383 && symtab_hdr->contents != (unsigned char *) isymbuf)
7384 {
7385 if (! link_info->keep_memory)
7386 free (isymbuf);
7387 else
7388 {
7389 /* Cache the symbols for elf_link_input_bfd. */
7390 symtab_hdr->contents = (unsigned char *) isymbuf;
7391 }
7392 }
7393
7394 if (contents != NULL
7395 && elf_section_data (isec)->this_hdr.contents != contents)
7396 {
7397 if (!changes && !link_info->keep_memory)
7398 free (contents);
7399 else
7400 {
7401 /* Cache the section contents for elf_link_input_bfd. */
7402 elf_section_data (isec)->this_hdr.contents = contents;
7403 }
7404 }
7405
7406 changes += picfixup_size;
7407 if (changes != 0)
7408 {
7409 /* Append sufficient NOP relocs so we can write out relocation
7410 information for the trampolines. */
7411 Elf_Internal_Shdr *rel_hdr;
7412 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7413 * sizeof (*new_relocs));
7414 unsigned ix;
7415
7416 if (!new_relocs)
7417 goto error_return;
7418 memcpy (new_relocs, internal_relocs,
7419 isec->reloc_count * sizeof (*new_relocs));
7420 for (ix = changes; ix--;)
7421 {
7422 irel = new_relocs + ix + isec->reloc_count;
7423
7424 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7425 }
7426 if (internal_relocs != elf_section_data (isec)->relocs)
7427 free (internal_relocs);
7428 elf_section_data (isec)->relocs = new_relocs;
7429 isec->reloc_count += changes;
7430 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7431 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7432 }
7433 else if (internal_relocs != NULL
7434 && elf_section_data (isec)->relocs != internal_relocs)
7435 free (internal_relocs);
7436
7437 *again = changes != 0 || workaround_change;
7438 return TRUE;
7439
7440 error_return:
7441 while (branch_fixups != NULL)
7442 {
7443 struct one_branch_fixup *f = branch_fixups;
7444 branch_fixups = branch_fixups->next;
7445 free (f);
7446 }
7447 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7448 free (isymbuf);
7449 if (contents != NULL
7450 && elf_section_data (isec)->this_hdr.contents != contents)
7451 free (contents);
7452 if (internal_relocs != NULL
7453 && elf_section_data (isec)->relocs != internal_relocs)
7454 free (internal_relocs);
7455 return FALSE;
7456 }
7457 \f
7458 /* What to do when ld finds relocations against symbols defined in
7459 discarded sections. */
7460
7461 static unsigned int
7462 ppc_elf_action_discarded (asection *sec)
7463 {
7464 if (strcmp (".fixup", sec->name) == 0)
7465 return 0;
7466
7467 if (strcmp (".got2", sec->name) == 0)
7468 return 0;
7469
7470 return _bfd_elf_default_action_discarded (sec);
7471 }
7472 \f
7473 /* Fill in the address for a pointer generated in a linker section. */
7474
7475 static bfd_vma
7476 elf_finish_pointer_linker_section (bfd *input_bfd,
7477 elf_linker_section_t *lsect,
7478 struct elf_link_hash_entry *h,
7479 bfd_vma relocation,
7480 const Elf_Internal_Rela *rel)
7481 {
7482 elf_linker_section_pointers_t *linker_section_ptr;
7483
7484 BFD_ASSERT (lsect != NULL);
7485
7486 if (h != NULL)
7487 {
7488 /* Handle global symbol. */
7489 struct ppc_elf_link_hash_entry *eh;
7490
7491 eh = (struct ppc_elf_link_hash_entry *) h;
7492 BFD_ASSERT (eh->elf.def_regular);
7493 linker_section_ptr = eh->linker_section_pointer;
7494 }
7495 else
7496 {
7497 /* Handle local symbol. */
7498 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7499
7500 BFD_ASSERT (is_ppc_elf (input_bfd));
7501 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7502 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7503 }
7504
7505 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7506 rel->r_addend,
7507 lsect);
7508 BFD_ASSERT (linker_section_ptr != NULL);
7509
7510 /* Offset will always be a multiple of four, so use the bottom bit
7511 as a "written" flag. */
7512 if ((linker_section_ptr->offset & 1) == 0)
7513 {
7514 bfd_put_32 (lsect->section->owner,
7515 relocation + linker_section_ptr->addend,
7516 lsect->section->contents + linker_section_ptr->offset);
7517 linker_section_ptr->offset += 1;
7518 }
7519
7520 relocation = (lsect->section->output_section->vma
7521 + lsect->section->output_offset
7522 + linker_section_ptr->offset - 1
7523 - SYM_VAL (lsect->sym));
7524
7525 #ifdef DEBUG
7526 fprintf (stderr,
7527 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7528 lsect->name, (long) relocation, (long) relocation);
7529 #endif
7530
7531 return relocation;
7532 }
7533
7534 #define PPC_LO(v) ((v) & 0xffff)
7535 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7536 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7537
7538 static void
7539 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7540 struct bfd_link_info *info)
7541 {
7542 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7543 bfd *output_bfd = info->output_bfd;
7544 bfd_vma plt;
7545
7546 plt = ((ent->plt.offset & ~1)
7547 + plt_sec->output_section->vma
7548 + plt_sec->output_offset);
7549
7550 if (bfd_link_pic (info))
7551 {
7552 bfd_vma got = 0;
7553
7554 if (ent->addend >= 32768)
7555 got = (ent->addend
7556 + ent->sec->output_section->vma
7557 + ent->sec->output_offset);
7558 else if (htab->elf.hgot != NULL)
7559 got = SYM_VAL (htab->elf.hgot);
7560
7561 plt -= got;
7562
7563 if (plt + 0x8000 < 0x10000)
7564 {
7565 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7566 p += 4;
7567 bfd_put_32 (output_bfd, MTCTR_11, p);
7568 p += 4;
7569 bfd_put_32 (output_bfd, BCTR, p);
7570 p += 4;
7571 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7572 p += 4;
7573 }
7574 else
7575 {
7576 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7577 p += 4;
7578 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7579 p += 4;
7580 bfd_put_32 (output_bfd, MTCTR_11, p);
7581 p += 4;
7582 bfd_put_32 (output_bfd, BCTR, p);
7583 p += 4;
7584 }
7585 }
7586 else
7587 {
7588 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7589 p += 4;
7590 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7591 p += 4;
7592 bfd_put_32 (output_bfd, MTCTR_11, p);
7593 p += 4;
7594 bfd_put_32 (output_bfd, BCTR, p);
7595 p += 4;
7596 }
7597 }
7598
7599 /* Return true if symbol is defined statically. */
7600
7601 static bfd_boolean
7602 is_static_defined (struct elf_link_hash_entry *h)
7603 {
7604 return ((h->root.type == bfd_link_hash_defined
7605 || h->root.type == bfd_link_hash_defweak)
7606 && h->root.u.def.section != NULL
7607 && h->root.u.def.section->output_section != NULL);
7608 }
7609
7610 /* If INSN is an opcode that may be used with an @tls operand, return
7611 the transformed insn for TLS optimisation, otherwise return 0. If
7612 REG is non-zero only match an insn with RB or RA equal to REG. */
7613
7614 unsigned int
7615 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7616 {
7617 unsigned int rtra;
7618
7619 if ((insn & (0x3f << 26)) != 31 << 26)
7620 return 0;
7621
7622 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7623 rtra = insn & ((1 << 26) - (1 << 16));
7624 else if (((insn >> 16) & 0x1f) == reg)
7625 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7626 else
7627 return 0;
7628
7629 if ((insn & (0x3ff << 1)) == 266 << 1)
7630 /* add -> addi. */
7631 insn = 14 << 26;
7632 else if ((insn & (0x1f << 1)) == 23 << 1
7633 && ((insn & (0x1f << 6)) < 14 << 6
7634 || ((insn & (0x1f << 6)) >= 16 << 6
7635 && (insn & (0x1f << 6)) < 24 << 6)))
7636 /* load and store indexed -> dform. */
7637 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7638 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7639 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7640 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7641 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7642 /* lwax -> lwa. */
7643 insn = (58 << 26) | 2;
7644 else
7645 return 0;
7646 insn |= rtra;
7647 return insn;
7648 }
7649
7650 /* If INSN is an opcode that may be used with an @tprel operand, return
7651 the transformed insn for an undefined weak symbol, ie. with the
7652 thread pointer REG operand removed. Otherwise return 0. */
7653
7654 unsigned int
7655 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7656 {
7657 if ((insn & (0x1f << 16)) == reg << 16
7658 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7659 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7660 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7661 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7662 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7663 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7664 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7665 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7666 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7667 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7668 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7669 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7670 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7671 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7672 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7673 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7674 && (insn & 3) != 1)
7675 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7676 && ((insn & 3) == 0 || (insn & 3) == 3))))
7677 {
7678 insn &= ~(0x1f << 16);
7679 }
7680 else if ((insn & (0x1f << 21)) == reg << 21
7681 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7682 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7683 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7684 {
7685 insn &= ~(0x1f << 21);
7686 insn |= (insn & (0x1f << 16)) << 5;
7687 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7688 insn -= 2 >> 26; /* convert to ori,oris */
7689 }
7690 else
7691 insn = 0;
7692 return insn;
7693 }
7694
7695 static bfd_boolean
7696 is_insn_ds_form (unsigned int insn)
7697 {
7698 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7699 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7700 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7701 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7702 }
7703
7704 static bfd_boolean
7705 is_insn_dq_form (unsigned int insn)
7706 {
7707 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7708 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7709 && (insn & 3) == 1));
7710 }
7711
7712 /* The RELOCATE_SECTION function is called by the ELF backend linker
7713 to handle the relocations for a section.
7714
7715 The relocs are always passed as Rela structures; if the section
7716 actually uses Rel structures, the r_addend field will always be
7717 zero.
7718
7719 This function is responsible for adjust the section contents as
7720 necessary, and (if using Rela relocs and generating a
7721 relocatable output file) adjusting the reloc addend as
7722 necessary.
7723
7724 This function does not have to worry about setting the reloc
7725 address or the reloc symbol index.
7726
7727 LOCAL_SYMS is a pointer to the swapped in local symbols.
7728
7729 LOCAL_SECTIONS is an array giving the section in the input file
7730 corresponding to the st_shndx field of each local symbol.
7731
7732 The global hash table entry for the global symbols can be found
7733 via elf_sym_hashes (input_bfd).
7734
7735 When generating relocatable output, this function must handle
7736 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7737 going to be the section symbol corresponding to the output
7738 section, which means that the addend must be adjusted
7739 accordingly. */
7740
7741 static bfd_boolean
7742 ppc_elf_relocate_section (bfd *output_bfd,
7743 struct bfd_link_info *info,
7744 bfd *input_bfd,
7745 asection *input_section,
7746 bfd_byte *contents,
7747 Elf_Internal_Rela *relocs,
7748 Elf_Internal_Sym *local_syms,
7749 asection **local_sections)
7750 {
7751 Elf_Internal_Shdr *symtab_hdr;
7752 struct elf_link_hash_entry **sym_hashes;
7753 struct ppc_elf_link_hash_table *htab;
7754 Elf_Internal_Rela *rel;
7755 Elf_Internal_Rela *wrel;
7756 Elf_Internal_Rela *relend;
7757 Elf_Internal_Rela outrel;
7758 asection *got2;
7759 bfd_vma *local_got_offsets;
7760 bfd_boolean ret = TRUE;
7761 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7762 bfd_boolean is_vxworks_tls;
7763 unsigned int picfixup_size = 0;
7764 struct ppc_elf_relax_info *relax_info = NULL;
7765
7766 #ifdef DEBUG
7767 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7768 "%ld relocations%s",
7769 input_bfd, input_section,
7770 (long) input_section->reloc_count,
7771 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7772 #endif
7773
7774 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7775
7776 /* Initialize howto table if not already done. */
7777 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7778 ppc_elf_howto_init ();
7779
7780 htab = ppc_elf_hash_table (info);
7781 local_got_offsets = elf_local_got_offsets (input_bfd);
7782 symtab_hdr = &elf_symtab_hdr (input_bfd);
7783 sym_hashes = elf_sym_hashes (input_bfd);
7784 /* We have to handle relocations in vxworks .tls_vars sections
7785 specially, because the dynamic loader is 'weird'. */
7786 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7787 && !strcmp (input_section->output_section->name,
7788 ".tls_vars"));
7789 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7790 relax_info = elf_section_data (input_section)->sec_info;
7791 rel = wrel = relocs;
7792 relend = relocs + input_section->reloc_count;
7793 for (; rel < relend; wrel++, rel++)
7794 {
7795 enum elf_ppc_reloc_type r_type;
7796 bfd_vma addend;
7797 bfd_reloc_status_type r;
7798 Elf_Internal_Sym *sym;
7799 asection *sec;
7800 struct elf_link_hash_entry *h;
7801 const char *sym_name;
7802 reloc_howto_type *howto;
7803 unsigned long r_symndx;
7804 bfd_vma relocation;
7805 bfd_vma branch_bit, from;
7806 bfd_boolean unresolved_reloc;
7807 bfd_boolean warned;
7808 unsigned int tls_type, tls_mask, tls_gd;
7809 struct plt_entry **ifunc;
7810 struct reloc_howto_struct alt_howto;
7811
7812 again:
7813 r_type = ELF32_R_TYPE (rel->r_info);
7814 sym = NULL;
7815 sec = NULL;
7816 h = NULL;
7817 unresolved_reloc = FALSE;
7818 warned = FALSE;
7819 r_symndx = ELF32_R_SYM (rel->r_info);
7820
7821 if (r_symndx < symtab_hdr->sh_info)
7822 {
7823 sym = local_syms + r_symndx;
7824 sec = local_sections[r_symndx];
7825 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7826
7827 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7828 }
7829 else
7830 {
7831 bfd_boolean ignored;
7832
7833 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7834 r_symndx, symtab_hdr, sym_hashes,
7835 h, sec, relocation,
7836 unresolved_reloc, warned, ignored);
7837
7838 sym_name = h->root.root.string;
7839 }
7840
7841 if (sec != NULL && discarded_section (sec))
7842 {
7843 /* For relocs against symbols from removed linkonce sections,
7844 or sections discarded by a linker script, we just want the
7845 section contents zeroed. Avoid any special processing. */
7846 howto = NULL;
7847 if (r_type < R_PPC_max)
7848 howto = ppc_elf_howto_table[r_type];
7849
7850 _bfd_clear_contents (howto, input_bfd, input_section,
7851 contents + rel->r_offset);
7852 wrel->r_offset = rel->r_offset;
7853 wrel->r_info = 0;
7854 wrel->r_addend = 0;
7855
7856 /* For ld -r, remove relocations in debug sections against
7857 sections defined in discarded sections. Not done for
7858 non-debug to preserve relocs in .eh_frame which the
7859 eh_frame editing code expects to be present. */
7860 if (bfd_link_relocatable (info)
7861 && (input_section->flags & SEC_DEBUGGING))
7862 wrel--;
7863
7864 continue;
7865 }
7866
7867 if (bfd_link_relocatable (info))
7868 {
7869 if (got2 != NULL
7870 && r_type == R_PPC_PLTREL24
7871 && rel->r_addend != 0)
7872 {
7873 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7874 addend specifies the GOT pointer offset within .got2. */
7875 rel->r_addend += got2->output_offset;
7876 }
7877 if (r_type != R_PPC_RELAX_PLT
7878 && r_type != R_PPC_RELAX_PLTREL24
7879 && r_type != R_PPC_RELAX)
7880 goto copy_reloc;
7881 }
7882
7883 /* TLS optimizations. Replace instruction sequences and relocs
7884 based on information we collected in tls_optimize. We edit
7885 RELOCS so that --emit-relocs will output something sensible
7886 for the final instruction stream. */
7887 tls_mask = 0;
7888 tls_gd = 0;
7889 if (h != NULL)
7890 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7891 else if (local_got_offsets != NULL)
7892 {
7893 struct plt_entry **local_plt;
7894 char *lgot_masks;
7895 local_plt
7896 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7897 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7898 tls_mask = lgot_masks[r_symndx];
7899 }
7900
7901 /* Ensure reloc mapping code below stays sane. */
7902 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7903 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7904 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7905 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7906 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7907 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7908 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7909 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7910 abort ();
7911 switch (r_type)
7912 {
7913 default:
7914 break;
7915
7916 case R_PPC_GOT_TPREL16:
7917 case R_PPC_GOT_TPREL16_LO:
7918 if ((tls_mask & TLS_TLS) != 0
7919 && (tls_mask & TLS_TPREL) == 0)
7920 {
7921 bfd_vma insn;
7922
7923 insn = bfd_get_32 (output_bfd,
7924 contents + rel->r_offset - d_offset);
7925 insn &= 31 << 21;
7926 insn |= 0x3c020000; /* addis 0,2,0 */
7927 bfd_put_32 (output_bfd, insn,
7928 contents + rel->r_offset - d_offset);
7929 r_type = R_PPC_TPREL16_HA;
7930 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7931 }
7932 break;
7933
7934 case R_PPC_TLS:
7935 if ((tls_mask & TLS_TLS) != 0
7936 && (tls_mask & TLS_TPREL) == 0)
7937 {
7938 bfd_vma insn;
7939
7940 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7941 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7942 if (insn == 0)
7943 abort ();
7944 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7945 r_type = R_PPC_TPREL16_LO;
7946 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7947
7948 /* Was PPC_TLS which sits on insn boundary, now
7949 PPC_TPREL16_LO which is at low-order half-word. */
7950 rel->r_offset += d_offset;
7951 }
7952 break;
7953
7954 case R_PPC_GOT_TLSGD16_HI:
7955 case R_PPC_GOT_TLSGD16_HA:
7956 tls_gd = TLS_TPRELGD;
7957 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7958 goto tls_gdld_hi;
7959 break;
7960
7961 case R_PPC_GOT_TLSLD16_HI:
7962 case R_PPC_GOT_TLSLD16_HA:
7963 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7964 {
7965 tls_gdld_hi:
7966 if ((tls_mask & tls_gd) != 0)
7967 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7968 + R_PPC_GOT_TPREL16);
7969 else
7970 {
7971 rel->r_offset -= d_offset;
7972 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7973 r_type = R_PPC_NONE;
7974 }
7975 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7976 }
7977 break;
7978
7979 case R_PPC_GOT_TLSGD16:
7980 case R_PPC_GOT_TLSGD16_LO:
7981 tls_gd = TLS_TPRELGD;
7982 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7983 goto tls_ldgd_opt;
7984 break;
7985
7986 case R_PPC_GOT_TLSLD16:
7987 case R_PPC_GOT_TLSLD16_LO:
7988 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7989 {
7990 unsigned int insn1, insn2;
7991 bfd_vma offset;
7992
7993 tls_ldgd_opt:
7994 offset = (bfd_vma) -1;
7995 /* If not using the newer R_PPC_TLSGD/LD to mark
7996 __tls_get_addr calls, we must trust that the call
7997 stays with its arg setup insns, ie. that the next
7998 reloc is the __tls_get_addr call associated with
7999 the current reloc. Edit both insns. */
8000 if (input_section->has_tls_get_addr_call
8001 && rel + 1 < relend
8002 && branch_reloc_hash_match (input_bfd, rel + 1,
8003 htab->tls_get_addr))
8004 offset = rel[1].r_offset;
8005 /* We read the low GOT_TLS insn because we need to keep
8006 the destination reg. It may be something other than
8007 the usual r3, and moved to r3 before the call by
8008 intervening code. */
8009 insn1 = bfd_get_32 (output_bfd,
8010 contents + rel->r_offset - d_offset);
8011 if ((tls_mask & tls_gd) != 0)
8012 {
8013 /* IE */
8014 insn1 &= (0x1f << 21) | (0x1f << 16);
8015 insn1 |= 32 << 26; /* lwz */
8016 if (offset != (bfd_vma) -1)
8017 {
8018 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8019 insn2 = 0x7c631214; /* add 3,3,2 */
8020 bfd_put_32 (output_bfd, insn2, contents + offset);
8021 }
8022 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8023 + R_PPC_GOT_TPREL16);
8024 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8025 }
8026 else
8027 {
8028 /* LE */
8029 insn1 &= 0x1f << 21;
8030 insn1 |= 0x3c020000; /* addis r,2,0 */
8031 if (tls_gd == 0)
8032 {
8033 /* Was an LD reloc. */
8034 for (r_symndx = 0;
8035 r_symndx < symtab_hdr->sh_info;
8036 r_symndx++)
8037 if (local_sections[r_symndx] == sec)
8038 break;
8039 if (r_symndx >= symtab_hdr->sh_info)
8040 r_symndx = STN_UNDEF;
8041 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8042 if (r_symndx != STN_UNDEF)
8043 rel->r_addend -= (local_syms[r_symndx].st_value
8044 + sec->output_offset
8045 + sec->output_section->vma);
8046 }
8047 r_type = R_PPC_TPREL16_HA;
8048 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8049 if (offset != (bfd_vma) -1)
8050 {
8051 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8052 rel[1].r_offset = offset + d_offset;
8053 rel[1].r_addend = rel->r_addend;
8054 insn2 = 0x38630000; /* addi 3,3,0 */
8055 bfd_put_32 (output_bfd, insn2, contents + offset);
8056 }
8057 }
8058 bfd_put_32 (output_bfd, insn1,
8059 contents + rel->r_offset - d_offset);
8060 if (tls_gd == 0)
8061 {
8062 /* We changed the symbol on an LD reloc. Start over
8063 in order to get h, sym, sec etc. right. */
8064 goto again;
8065 }
8066 }
8067 break;
8068
8069 case R_PPC_TLSGD:
8070 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8071 {
8072 unsigned int insn2;
8073 bfd_vma offset = rel->r_offset;
8074
8075 if ((tls_mask & TLS_TPRELGD) != 0)
8076 {
8077 /* IE */
8078 r_type = R_PPC_NONE;
8079 insn2 = 0x7c631214; /* add 3,3,2 */
8080 }
8081 else
8082 {
8083 /* LE */
8084 r_type = R_PPC_TPREL16_LO;
8085 rel->r_offset += d_offset;
8086 insn2 = 0x38630000; /* addi 3,3,0 */
8087 }
8088 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8089 bfd_put_32 (output_bfd, insn2, contents + offset);
8090 /* Zap the reloc on the _tls_get_addr call too. */
8091 BFD_ASSERT (offset == rel[1].r_offset);
8092 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8093 }
8094 break;
8095
8096 case R_PPC_TLSLD:
8097 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8098 {
8099 unsigned int insn2;
8100
8101 for (r_symndx = 0;
8102 r_symndx < symtab_hdr->sh_info;
8103 r_symndx++)
8104 if (local_sections[r_symndx] == sec)
8105 break;
8106 if (r_symndx >= symtab_hdr->sh_info)
8107 r_symndx = STN_UNDEF;
8108 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8109 if (r_symndx != STN_UNDEF)
8110 rel->r_addend -= (local_syms[r_symndx].st_value
8111 + sec->output_offset
8112 + sec->output_section->vma);
8113
8114 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8115 rel->r_offset += d_offset;
8116 insn2 = 0x38630000; /* addi 3,3,0 */
8117 bfd_put_32 (output_bfd, insn2,
8118 contents + rel->r_offset - d_offset);
8119 /* Zap the reloc on the _tls_get_addr call too. */
8120 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8121 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8122 goto again;
8123 }
8124 break;
8125 }
8126
8127 /* Handle other relocations that tweak non-addend part of insn. */
8128 branch_bit = 0;
8129 switch (r_type)
8130 {
8131 default:
8132 break;
8133
8134 /* Branch taken prediction relocations. */
8135 case R_PPC_ADDR14_BRTAKEN:
8136 case R_PPC_REL14_BRTAKEN:
8137 branch_bit = BRANCH_PREDICT_BIT;
8138 /* Fall thru */
8139
8140 /* Branch not taken prediction relocations. */
8141 case R_PPC_ADDR14_BRNTAKEN:
8142 case R_PPC_REL14_BRNTAKEN:
8143 {
8144 bfd_vma insn;
8145
8146 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8147 insn &= ~BRANCH_PREDICT_BIT;
8148 insn |= branch_bit;
8149
8150 from = (rel->r_offset
8151 + input_section->output_offset
8152 + input_section->output_section->vma);
8153
8154 /* Invert 'y' bit if not the default. */
8155 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8156 insn ^= BRANCH_PREDICT_BIT;
8157
8158 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8159 break;
8160 }
8161 }
8162
8163 if (ELIMINATE_COPY_RELOCS
8164 && h != NULL
8165 && !h->def_regular
8166 && h->protected_def
8167 && ppc_elf_hash_entry (h)->has_addr16_ha
8168 && ppc_elf_hash_entry (h)->has_addr16_lo
8169 && htab->params->pic_fixup > 0)
8170 {
8171 /* Convert lis;addi or lis;load/store accessing a protected
8172 variable defined in a shared library to PIC. */
8173 unsigned int insn;
8174
8175 if (r_type == R_PPC_ADDR16_HA)
8176 {
8177 insn = bfd_get_32 (output_bfd,
8178 contents + rel->r_offset - d_offset);
8179 if ((insn & (0x3f << 26)) == (15u << 26)
8180 && (insn & (0x1f << 16)) == 0 /* lis */)
8181 {
8182 bfd_byte *p;
8183 bfd_vma off;
8184 bfd_vma got_addr;
8185
8186 p = (contents + input_section->size
8187 - relax_info->workaround_size
8188 - relax_info->picfixup_size
8189 + picfixup_size);
8190 off = (p - contents) - (rel->r_offset - d_offset);
8191 if (off > 0x1fffffc || (off & 3) != 0)
8192 info->callbacks->einfo
8193 (_("%P: %H: fixup branch overflow\n"),
8194 input_bfd, input_section, rel->r_offset);
8195
8196 bfd_put_32 (output_bfd, B | off,
8197 contents + rel->r_offset - d_offset);
8198 got_addr = (htab->got->output_section->vma
8199 + htab->got->output_offset
8200 + (h->got.offset & ~1));
8201 wrel->r_offset = (p - contents) + d_offset;
8202 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8203 wrel->r_addend = got_addr;
8204 insn &= ~0xffff;
8205 insn |= ((unsigned int )(got_addr + 0x8000) >> 16) & 0xffff;
8206 bfd_put_32 (output_bfd, insn, p);
8207
8208 /* Convert lis to lwz, loading address from GOT. */
8209 insn &= ~0xffff;
8210 insn ^= (32u ^ 15u) << 26;
8211 insn |= (insn & (0x1f << 21)) >> 5;
8212 insn |= got_addr & 0xffff;
8213 bfd_put_32 (output_bfd, insn, p + 4);
8214
8215 bfd_put_32 (output_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8216 picfixup_size += 12;
8217
8218 /* Use one of the spare relocs, so --emit-relocs
8219 output is reasonable. */
8220 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8221 wrel++, rel++;
8222 rel->r_offset = wrel[-1].r_offset + 4;
8223 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8224 rel->r_addend = wrel[-1].r_addend;
8225
8226 /* Continue on as if we had a got reloc, to output
8227 dynamic reloc. */
8228 r_type = R_PPC_GOT16_LO;
8229 }
8230 else
8231 info->callbacks->einfo
8232 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8233 input_bfd, input_section, rel->r_offset,
8234 "R_PPC_ADDR16_HA", insn);
8235 }
8236 else if (r_type == R_PPC_ADDR16_LO)
8237 {
8238 insn = bfd_get_32 (output_bfd,
8239 contents + rel->r_offset - d_offset);
8240 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8241 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8242 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8243 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8244 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8245 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8246 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8247 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8248 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8249 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8250 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8251 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8252 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8253 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8254 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8255 && (insn & 3) != 1)
8256 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8257 && ((insn & 3) == 0 || (insn & 3) == 3)))
8258 {
8259 /* Arrange to apply the reloc addend, if any. */
8260 relocation = 0;
8261 unresolved_reloc = FALSE;
8262 rel->r_info = ELF32_R_INFO (0, r_type);
8263 }
8264 else
8265 info->callbacks->einfo
8266 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8267 input_bfd, input_section, rel->r_offset,
8268 "R_PPC_ADDR16_LO", insn);
8269 }
8270 }
8271
8272 ifunc = NULL;
8273 if (!htab->is_vxworks)
8274 {
8275 struct plt_entry *ent;
8276
8277 if (h != NULL)
8278 {
8279 if (h->type == STT_GNU_IFUNC)
8280 ifunc = &h->plt.plist;
8281 }
8282 else if (local_got_offsets != NULL
8283 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8284 {
8285 struct plt_entry **local_plt;
8286
8287 local_plt = (struct plt_entry **) (local_got_offsets
8288 + symtab_hdr->sh_info);
8289 ifunc = local_plt + r_symndx;
8290 }
8291
8292 ent = NULL;
8293 if (ifunc != NULL
8294 && (!bfd_link_pic (info)
8295 || is_branch_reloc (r_type)))
8296 {
8297 addend = 0;
8298 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8299 addend = rel->r_addend;
8300 ent = find_plt_ent (ifunc, got2, addend);
8301 }
8302 if (ent != NULL)
8303 {
8304 if (bfd_link_pic (info)
8305 && ent->sec != got2
8306 && htab->plt_type != PLT_NEW
8307 && (!htab->elf.dynamic_sections_created
8308 || h == NULL
8309 || h->dynindx == -1))
8310 {
8311 /* Uh oh, we are going to create a pic glink stub
8312 for an ifunc (here for h == NULL and later in
8313 finish_dynamic_symbol for h != NULL), and
8314 apparently are using code compiled with
8315 -mbss-plt. The difficulty is that -mbss-plt code
8316 gives no indication via a magic PLTREL24 addend
8317 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8318 is pointing into a .got2 section (and how far
8319 into .got2). */
8320 info->callbacks->einfo
8321 (_("%X%P: %H: unsupported bss-plt -fPIC ifunc %s\n"),
8322 input_bfd, input_section, rel->r_offset, sym_name);
8323 }
8324 if (h == NULL && (ent->plt.offset & 1) == 0)
8325 {
8326 Elf_Internal_Rela rela;
8327 bfd_byte *loc;
8328
8329 rela.r_offset = (htab->iplt->output_section->vma
8330 + htab->iplt->output_offset
8331 + ent->plt.offset);
8332 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8333 rela.r_addend = relocation;
8334 loc = htab->reliplt->contents;
8335 loc += (htab->reliplt->reloc_count++
8336 * sizeof (Elf32_External_Rela));
8337 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8338
8339 ent->plt.offset |= 1;
8340 }
8341 if (h == NULL && (ent->glink_offset & 1) == 0)
8342 {
8343 unsigned char *p = ((unsigned char *) htab->glink->contents
8344 + ent->glink_offset);
8345 write_glink_stub (ent, htab->iplt, p, info);
8346 ent->glink_offset |= 1;
8347 }
8348
8349 unresolved_reloc = FALSE;
8350 if (htab->plt_type == PLT_NEW
8351 || !htab->elf.dynamic_sections_created
8352 || h == NULL
8353 || h->dynindx == -1)
8354 relocation = (htab->glink->output_section->vma
8355 + htab->glink->output_offset
8356 + (ent->glink_offset & ~1));
8357 else
8358 relocation = (htab->plt->output_section->vma
8359 + htab->plt->output_offset
8360 + ent->plt.offset);
8361 }
8362 }
8363
8364 addend = rel->r_addend;
8365 tls_type = 0;
8366 howto = NULL;
8367 if (r_type < R_PPC_max)
8368 howto = ppc_elf_howto_table[r_type];
8369 switch (r_type)
8370 {
8371 default:
8372 info->callbacks->einfo
8373 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8374 input_bfd, (int) r_type, sym_name);
8375
8376 bfd_set_error (bfd_error_bad_value);
8377 ret = FALSE;
8378 goto copy_reloc;
8379
8380 case R_PPC_NONE:
8381 case R_PPC_TLS:
8382 case R_PPC_TLSGD:
8383 case R_PPC_TLSLD:
8384 case R_PPC_EMB_MRKREF:
8385 case R_PPC_GNU_VTINHERIT:
8386 case R_PPC_GNU_VTENTRY:
8387 goto copy_reloc;
8388
8389 /* GOT16 relocations. Like an ADDR16 using the symbol's
8390 address in the GOT as relocation value instead of the
8391 symbol's value itself. Also, create a GOT entry for the
8392 symbol and put the symbol value there. */
8393 case R_PPC_GOT_TLSGD16:
8394 case R_PPC_GOT_TLSGD16_LO:
8395 case R_PPC_GOT_TLSGD16_HI:
8396 case R_PPC_GOT_TLSGD16_HA:
8397 tls_type = TLS_TLS | TLS_GD;
8398 goto dogot;
8399
8400 case R_PPC_GOT_TLSLD16:
8401 case R_PPC_GOT_TLSLD16_LO:
8402 case R_PPC_GOT_TLSLD16_HI:
8403 case R_PPC_GOT_TLSLD16_HA:
8404 tls_type = TLS_TLS | TLS_LD;
8405 goto dogot;
8406
8407 case R_PPC_GOT_TPREL16:
8408 case R_PPC_GOT_TPREL16_LO:
8409 case R_PPC_GOT_TPREL16_HI:
8410 case R_PPC_GOT_TPREL16_HA:
8411 tls_type = TLS_TLS | TLS_TPREL;
8412 goto dogot;
8413
8414 case R_PPC_GOT_DTPREL16:
8415 case R_PPC_GOT_DTPREL16_LO:
8416 case R_PPC_GOT_DTPREL16_HI:
8417 case R_PPC_GOT_DTPREL16_HA:
8418 tls_type = TLS_TLS | TLS_DTPREL;
8419 goto dogot;
8420
8421 case R_PPC_GOT16:
8422 case R_PPC_GOT16_LO:
8423 case R_PPC_GOT16_HI:
8424 case R_PPC_GOT16_HA:
8425 tls_mask = 0;
8426 dogot:
8427 {
8428 /* Relocation is to the entry for this symbol in the global
8429 offset table. */
8430 bfd_vma off;
8431 bfd_vma *offp;
8432 unsigned long indx;
8433
8434 if (htab->got == NULL)
8435 abort ();
8436
8437 indx = 0;
8438 if (tls_type == (TLS_TLS | TLS_LD)
8439 && (h == NULL
8440 || !h->def_dynamic))
8441 offp = &htab->tlsld_got.offset;
8442 else if (h != NULL)
8443 {
8444 bfd_boolean dyn;
8445 dyn = htab->elf.dynamic_sections_created;
8446 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
8447 || (bfd_link_pic (info)
8448 && SYMBOL_REFERENCES_LOCAL (info, h)))
8449 /* This is actually a static link, or it is a
8450 -Bsymbolic link and the symbol is defined
8451 locally, or the symbol was forced to be local
8452 because of a version file. */
8453 ;
8454 else
8455 {
8456 BFD_ASSERT (h->dynindx != -1);
8457 indx = h->dynindx;
8458 unresolved_reloc = FALSE;
8459 }
8460 offp = &h->got.offset;
8461 }
8462 else
8463 {
8464 if (local_got_offsets == NULL)
8465 abort ();
8466 offp = &local_got_offsets[r_symndx];
8467 }
8468
8469 /* The offset must always be a multiple of 4. We use the
8470 least significant bit to record whether we have already
8471 processed this entry. */
8472 off = *offp;
8473 if ((off & 1) != 0)
8474 off &= ~1;
8475 else
8476 {
8477 unsigned int tls_m = (tls_mask
8478 & (TLS_LD | TLS_GD | TLS_DTPREL
8479 | TLS_TPREL | TLS_TPRELGD));
8480
8481 if (offp == &htab->tlsld_got.offset)
8482 tls_m = TLS_LD;
8483 else if (h == NULL
8484 || !h->def_dynamic)
8485 tls_m &= ~TLS_LD;
8486
8487 /* We might have multiple got entries for this sym.
8488 Initialize them all. */
8489 do
8490 {
8491 int tls_ty = 0;
8492
8493 if ((tls_m & TLS_LD) != 0)
8494 {
8495 tls_ty = TLS_TLS | TLS_LD;
8496 tls_m &= ~TLS_LD;
8497 }
8498 else if ((tls_m & TLS_GD) != 0)
8499 {
8500 tls_ty = TLS_TLS | TLS_GD;
8501 tls_m &= ~TLS_GD;
8502 }
8503 else if ((tls_m & TLS_DTPREL) != 0)
8504 {
8505 tls_ty = TLS_TLS | TLS_DTPREL;
8506 tls_m &= ~TLS_DTPREL;
8507 }
8508 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8509 {
8510 tls_ty = TLS_TLS | TLS_TPREL;
8511 tls_m = 0;
8512 }
8513
8514 /* Generate relocs for the dynamic linker. */
8515 if ((bfd_link_pic (info) || indx != 0)
8516 && (offp == &htab->tlsld_got.offset
8517 || h == NULL
8518 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8519 || h->root.type != bfd_link_hash_undefweak))
8520 {
8521 asection *rsec = htab->relgot;
8522 bfd_byte * loc;
8523
8524 if (ifunc != NULL)
8525 rsec = htab->reliplt;
8526 outrel.r_offset = (htab->got->output_section->vma
8527 + htab->got->output_offset
8528 + off);
8529 outrel.r_addend = 0;
8530 if (tls_ty & (TLS_LD | TLS_GD))
8531 {
8532 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8533 if (tls_ty == (TLS_TLS | TLS_GD))
8534 {
8535 loc = rsec->contents;
8536 loc += (rsec->reloc_count++
8537 * sizeof (Elf32_External_Rela));
8538 bfd_elf32_swap_reloca_out (output_bfd,
8539 &outrel, loc);
8540 outrel.r_offset += 4;
8541 outrel.r_info
8542 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8543 }
8544 }
8545 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8546 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8547 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8548 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8549 else if (indx != 0)
8550 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8551 else if (ifunc != NULL)
8552 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8553 else
8554 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8555 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8556 {
8557 outrel.r_addend += relocation;
8558 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8559 {
8560 if (htab->elf.tls_sec == NULL)
8561 outrel.r_addend = 0;
8562 else
8563 outrel.r_addend -= htab->elf.tls_sec->vma;
8564 }
8565 }
8566 loc = rsec->contents;
8567 loc += (rsec->reloc_count++
8568 * sizeof (Elf32_External_Rela));
8569 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8570 }
8571
8572 /* Init the .got section contents if we're not
8573 emitting a reloc. */
8574 else
8575 {
8576 bfd_vma value = relocation;
8577
8578 if (tls_ty == (TLS_TLS | TLS_LD))
8579 value = 1;
8580 else if (tls_ty != 0)
8581 {
8582 if (htab->elf.tls_sec == NULL)
8583 value = 0;
8584 else
8585 {
8586 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8587 if (tls_ty == (TLS_TLS | TLS_TPREL))
8588 value += DTP_OFFSET - TP_OFFSET;
8589 }
8590
8591 if (tls_ty == (TLS_TLS | TLS_GD))
8592 {
8593 bfd_put_32 (output_bfd, value,
8594 htab->got->contents + off + 4);
8595 value = 1;
8596 }
8597 }
8598 bfd_put_32 (output_bfd, value,
8599 htab->got->contents + off);
8600 }
8601
8602 off += 4;
8603 if (tls_ty & (TLS_LD | TLS_GD))
8604 off += 4;
8605 }
8606 while (tls_m != 0);
8607
8608 off = *offp;
8609 *offp = off | 1;
8610 }
8611
8612 if (off >= (bfd_vma) -2)
8613 abort ();
8614
8615 if ((tls_type & TLS_TLS) != 0)
8616 {
8617 if (tls_type != (TLS_TLS | TLS_LD))
8618 {
8619 if ((tls_mask & TLS_LD) != 0
8620 && !(h == NULL
8621 || !h->def_dynamic))
8622 off += 8;
8623 if (tls_type != (TLS_TLS | TLS_GD))
8624 {
8625 if ((tls_mask & TLS_GD) != 0)
8626 off += 8;
8627 if (tls_type != (TLS_TLS | TLS_DTPREL))
8628 {
8629 if ((tls_mask & TLS_DTPREL) != 0)
8630 off += 4;
8631 }
8632 }
8633 }
8634 }
8635
8636 /* If here for a picfixup, we're done. */
8637 if (r_type != ELF32_R_TYPE (rel->r_info))
8638 goto copy_reloc;
8639
8640 relocation = (htab->got->output_section->vma
8641 + htab->got->output_offset
8642 + off
8643 - SYM_VAL (htab->elf.hgot));
8644
8645 /* Addends on got relocations don't make much sense.
8646 x+off@got is actually x@got+off, and since the got is
8647 generated by a hash table traversal, the value in the
8648 got at entry m+n bears little relation to the entry m. */
8649 if (addend != 0)
8650 info->callbacks->einfo
8651 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8652 input_bfd, input_section, rel->r_offset,
8653 howto->name,
8654 sym_name);
8655 }
8656 break;
8657
8658 /* Relocations that need no special processing. */
8659 case R_PPC_LOCAL24PC:
8660 /* It makes no sense to point a local relocation
8661 at a symbol not in this object. */
8662 if (unresolved_reloc)
8663 {
8664 (*info->callbacks->undefined_symbol) (info,
8665 h->root.root.string,
8666 input_bfd,
8667 input_section,
8668 rel->r_offset,
8669 TRUE);
8670 goto copy_reloc;
8671 }
8672 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8673 {
8674 /* @local on an ifunc does not really make sense since
8675 the ifunc resolver can take you anywhere. More
8676 seriously, calls to ifuncs must go through a plt call
8677 stub, and for pic the plt call stubs uses r30 to
8678 access the PLT. The problem is that a call that is
8679 local won't have the +32k reloc addend trick marking
8680 -fPIC code, so the linker won't know whether r30 is
8681 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8682 info->callbacks->einfo (_("%X%P: %H: @local call to ifunc %s\n"),
8683 input_bfd, input_section, rel->r_offset,
8684 h->root.root.string);
8685 }
8686 break;
8687
8688 case R_PPC_DTPREL16:
8689 case R_PPC_DTPREL16_LO:
8690 case R_PPC_DTPREL16_HI:
8691 case R_PPC_DTPREL16_HA:
8692 if (htab->elf.tls_sec != NULL)
8693 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8694 break;
8695
8696 /* Relocations that may need to be propagated if this is a shared
8697 object. */
8698 case R_PPC_TPREL16:
8699 case R_PPC_TPREL16_LO:
8700 case R_PPC_TPREL16_HI:
8701 case R_PPC_TPREL16_HA:
8702 if (h != NULL
8703 && h->root.type == bfd_link_hash_undefweak
8704 && h->dynindx == -1)
8705 {
8706 /* Make this relocation against an undefined weak symbol
8707 resolve to zero. This is really just a tweak, since
8708 code using weak externs ought to check that they are
8709 defined before using them. */
8710 bfd_byte *p = contents + rel->r_offset - d_offset;
8711 unsigned int insn = bfd_get_32 (output_bfd, p);
8712 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8713 if (insn != 0)
8714 bfd_put_32 (output_bfd, insn, p);
8715 break;
8716 }
8717 if (htab->elf.tls_sec != NULL)
8718 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8719 /* The TPREL16 relocs shouldn't really be used in shared
8720 libs as they will result in DT_TEXTREL being set, but
8721 support them anyway. */
8722 goto dodyn;
8723
8724 case R_PPC_TPREL32:
8725 if (htab->elf.tls_sec != NULL)
8726 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8727 goto dodyn;
8728
8729 case R_PPC_DTPREL32:
8730 if (htab->elf.tls_sec != NULL)
8731 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8732 goto dodyn;
8733
8734 case R_PPC_DTPMOD32:
8735 relocation = 1;
8736 addend = 0;
8737 goto dodyn;
8738
8739 case R_PPC_REL16:
8740 case R_PPC_REL16_LO:
8741 case R_PPC_REL16_HI:
8742 case R_PPC_REL16_HA:
8743 case R_PPC_REL16DX_HA:
8744 break;
8745
8746 case R_PPC_REL32:
8747 if (h == NULL || h == htab->elf.hgot)
8748 break;
8749 /* fall through */
8750
8751 case R_PPC_ADDR32:
8752 case R_PPC_ADDR16:
8753 case R_PPC_ADDR16_LO:
8754 case R_PPC_ADDR16_HI:
8755 case R_PPC_ADDR16_HA:
8756 case R_PPC_UADDR32:
8757 case R_PPC_UADDR16:
8758 goto dodyn;
8759
8760 case R_PPC_VLE_REL8:
8761 case R_PPC_VLE_REL15:
8762 case R_PPC_VLE_REL24:
8763 case R_PPC_REL24:
8764 case R_PPC_REL14:
8765 case R_PPC_REL14_BRTAKEN:
8766 case R_PPC_REL14_BRNTAKEN:
8767 /* If these relocations are not to a named symbol, they can be
8768 handled right here, no need to bother the dynamic linker. */
8769 if (SYMBOL_CALLS_LOCAL (info, h)
8770 || h == htab->elf.hgot)
8771 break;
8772 /* fall through */
8773
8774 case R_PPC_ADDR24:
8775 case R_PPC_ADDR14:
8776 case R_PPC_ADDR14_BRTAKEN:
8777 case R_PPC_ADDR14_BRNTAKEN:
8778 if (h != NULL && !bfd_link_pic (info))
8779 break;
8780 /* fall through */
8781
8782 dodyn:
8783 if ((input_section->flags & SEC_ALLOC) == 0
8784 || is_vxworks_tls)
8785 break;
8786
8787 if ((bfd_link_pic (info)
8788 && !(h != NULL
8789 && ((h->root.type == bfd_link_hash_undefined
8790 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8791 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8792 || (h->root.type == bfd_link_hash_undefweak
8793 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8794 && (must_be_dyn_reloc (info, r_type)
8795 || !SYMBOL_CALLS_LOCAL (info, h)))
8796 || (ELIMINATE_COPY_RELOCS
8797 && !bfd_link_pic (info)
8798 && h != NULL
8799 && h->dynindx != -1
8800 && !h->non_got_ref
8801 && !h->def_regular
8802 && !(h->protected_def
8803 && ppc_elf_hash_entry (h)->has_addr16_ha
8804 && ppc_elf_hash_entry (h)->has_addr16_lo
8805 && htab->params->pic_fixup > 0)))
8806 {
8807 int skip;
8808 bfd_byte *loc;
8809 asection *sreloc;
8810 #ifdef DEBUG
8811 fprintf (stderr, "ppc_elf_relocate_section needs to "
8812 "create relocation for %s\n",
8813 (h && h->root.root.string
8814 ? h->root.root.string : "<unknown>"));
8815 #endif
8816
8817 /* When generating a shared object, these relocations
8818 are copied into the output file to be resolved at run
8819 time. */
8820 sreloc = elf_section_data (input_section)->sreloc;
8821 if (ifunc)
8822 sreloc = htab->reliplt;
8823 if (sreloc == NULL)
8824 return FALSE;
8825
8826 skip = 0;
8827 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8828 input_section,
8829 rel->r_offset);
8830 if (outrel.r_offset == (bfd_vma) -1
8831 || outrel.r_offset == (bfd_vma) -2)
8832 skip = (int) outrel.r_offset;
8833 outrel.r_offset += (input_section->output_section->vma
8834 + input_section->output_offset);
8835
8836 if (skip)
8837 memset (&outrel, 0, sizeof outrel);
8838 else if ((h != NULL
8839 && (h->root.type == bfd_link_hash_undefined
8840 || h->root.type == bfd_link_hash_undefweak))
8841 || !SYMBOL_REFERENCES_LOCAL (info, h))
8842 {
8843 BFD_ASSERT (h->dynindx != -1);
8844 unresolved_reloc = FALSE;
8845 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8846 outrel.r_addend = rel->r_addend;
8847 }
8848 else
8849 {
8850 outrel.r_addend = relocation + rel->r_addend;
8851
8852 if (r_type != R_PPC_ADDR32)
8853 {
8854 long indx = 0;
8855
8856 if (ifunc != NULL)
8857 {
8858 /* If we get here when building a static
8859 executable, then the libc startup function
8860 responsible for applying indirect function
8861 relocations is going to complain about
8862 the reloc type.
8863 If we get here when building a dynamic
8864 executable, it will be because we have
8865 a text relocation. The dynamic loader
8866 will set the text segment writable and
8867 non-executable to apply text relocations.
8868 So we'll segfault when trying to run the
8869 indirection function to resolve the reloc. */
8870 info->callbacks->einfo
8871 (_("%P: %H: relocation %s for indirect "
8872 "function %s unsupported\n"),
8873 input_bfd, input_section, rel->r_offset,
8874 howto->name,
8875 sym_name);
8876 ret = FALSE;
8877 }
8878 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8879 ;
8880 else if (sec == NULL || sec->owner == NULL)
8881 {
8882 bfd_set_error (bfd_error_bad_value);
8883 ret = FALSE;
8884 }
8885 else
8886 {
8887 asection *osec;
8888
8889 /* We are turning this relocation into one
8890 against a section symbol. It would be
8891 proper to subtract the symbol's value,
8892 osec->vma, from the emitted reloc addend,
8893 but ld.so expects buggy relocs.
8894 FIXME: Why not always use a zero index? */
8895 osec = sec->output_section;
8896 indx = elf_section_data (osec)->dynindx;
8897 if (indx == 0)
8898 {
8899 osec = htab->elf.text_index_section;
8900 indx = elf_section_data (osec)->dynindx;
8901 }
8902 BFD_ASSERT (indx != 0);
8903 #ifdef DEBUG
8904 if (indx == 0)
8905 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8906 indx, osec->name, osec->flags,
8907 h->root.root.string);
8908 #endif
8909 }
8910
8911 outrel.r_info = ELF32_R_INFO (indx, r_type);
8912 }
8913 else if (ifunc != NULL)
8914 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8915 else
8916 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8917 }
8918
8919 loc = sreloc->contents;
8920 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8921 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8922
8923 if (skip == -1)
8924 goto copy_reloc;
8925
8926 /* This reloc will be computed at runtime. We clear the memory
8927 so that it contains predictable value. */
8928 if (! skip
8929 && ((input_section->flags & SEC_ALLOC) != 0
8930 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8931 {
8932 relocation = howto->pc_relative ? outrel.r_offset : 0;
8933 addend = 0;
8934 break;
8935 }
8936 }
8937 break;
8938
8939 case R_PPC_RELAX_PLT:
8940 case R_PPC_RELAX_PLTREL24:
8941 if (h != NULL)
8942 {
8943 struct plt_entry *ent;
8944 bfd_vma got2_addend = 0;
8945
8946 if (r_type == R_PPC_RELAX_PLTREL24)
8947 {
8948 if (bfd_link_pic (info))
8949 got2_addend = addend;
8950 addend = 0;
8951 }
8952 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8953 if (htab->plt_type == PLT_NEW)
8954 relocation = (htab->glink->output_section->vma
8955 + htab->glink->output_offset
8956 + ent->glink_offset);
8957 else
8958 relocation = (htab->plt->output_section->vma
8959 + htab->plt->output_offset
8960 + ent->plt.offset);
8961 }
8962 /* Fall thru */
8963
8964 case R_PPC_RELAX:
8965 {
8966 const int *stub;
8967 size_t size;
8968 size_t insn_offset = rel->r_offset;
8969 unsigned int insn;
8970
8971 if (bfd_link_pic (info))
8972 {
8973 relocation -= (input_section->output_section->vma
8974 + input_section->output_offset
8975 + rel->r_offset - 4);
8976 stub = shared_stub_entry;
8977 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
8978 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
8979 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
8980 stub += 3;
8981 size = ARRAY_SIZE (shared_stub_entry) - 3;
8982 }
8983 else
8984 {
8985 stub = stub_entry;
8986 size = ARRAY_SIZE (stub_entry);
8987 }
8988
8989 relocation += addend;
8990 if (bfd_link_relocatable (info))
8991 relocation = 0;
8992
8993 /* First insn is HA, second is LO. */
8994 insn = *stub++;
8995 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8996 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8997 insn_offset += 4;
8998
8999 insn = *stub++;
9000 insn |= relocation & 0xffff;
9001 bfd_put_32 (output_bfd, insn, contents + insn_offset);
9002 insn_offset += 4;
9003 size -= 2;
9004
9005 while (size != 0)
9006 {
9007 insn = *stub++;
9008 --size;
9009 bfd_put_32 (output_bfd, insn, contents + insn_offset);
9010 insn_offset += 4;
9011 }
9012
9013 /* Rewrite the reloc and convert one of the trailing nop
9014 relocs to describe this relocation. */
9015 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9016 /* The relocs are at the bottom 2 bytes */
9017 wrel->r_offset = rel->r_offset + d_offset;
9018 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9019 wrel->r_addend = rel->r_addend;
9020 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9021 wrel++, rel++;
9022 wrel->r_offset += 4;
9023 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9024 }
9025 continue;
9026
9027 /* Indirect .sdata relocation. */
9028 case R_PPC_EMB_SDAI16:
9029 BFD_ASSERT (htab->sdata[0].section != NULL);
9030 if (!is_static_defined (htab->sdata[0].sym))
9031 {
9032 unresolved_reloc = TRUE;
9033 break;
9034 }
9035 relocation
9036 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9037 h, relocation, rel);
9038 addend = 0;
9039 break;
9040
9041 /* Indirect .sdata2 relocation. */
9042 case R_PPC_EMB_SDA2I16:
9043 BFD_ASSERT (htab->sdata[1].section != NULL);
9044 if (!is_static_defined (htab->sdata[1].sym))
9045 {
9046 unresolved_reloc = TRUE;
9047 break;
9048 }
9049 relocation
9050 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9051 h, relocation, rel);
9052 addend = 0;
9053 break;
9054
9055 /* Handle the TOC16 reloc. We want to use the offset within the .got
9056 section, not the actual VMA. This is appropriate when generating
9057 an embedded ELF object, for which the .got section acts like the
9058 AIX .toc section. */
9059 case R_PPC_TOC16: /* phony GOT16 relocations */
9060 if (sec == NULL || sec->output_section == NULL)
9061 {
9062 unresolved_reloc = TRUE;
9063 break;
9064 }
9065 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9066 ".got") == 0
9067 || strcmp (bfd_get_section_name (sec->owner, sec),
9068 ".cgot") == 0);
9069
9070 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9071 break;
9072
9073 case R_PPC_PLTREL24:
9074 if (h != NULL && ifunc == NULL)
9075 {
9076 struct plt_entry *ent;
9077
9078 ent = find_plt_ent (&h->plt.plist, got2,
9079 bfd_link_pic (info) ? addend : 0);
9080 if (ent == NULL
9081 || htab->plt == NULL)
9082 {
9083 /* We didn't make a PLT entry for this symbol. This
9084 happens when statically linking PIC code, or when
9085 using -Bsymbolic. */
9086 }
9087 else
9088 {
9089 /* Relocation is to the entry for this symbol in the
9090 procedure linkage table. */
9091 unresolved_reloc = FALSE;
9092 if (htab->plt_type == PLT_NEW)
9093 relocation = (htab->glink->output_section->vma
9094 + htab->glink->output_offset
9095 + ent->glink_offset);
9096 else
9097 relocation = (htab->plt->output_section->vma
9098 + htab->plt->output_offset
9099 + ent->plt.offset);
9100 }
9101 }
9102
9103 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9104 addend specifies the GOT pointer offset within .got2.
9105 Don't apply it to the relocation field. */
9106 addend = 0;
9107 break;
9108
9109 /* Relocate against _SDA_BASE_. */
9110 case R_PPC_SDAREL16:
9111 {
9112 const char *name;
9113 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9114
9115 if (sec == NULL
9116 || sec->output_section == NULL
9117 || !is_static_defined (sda))
9118 {
9119 unresolved_reloc = TRUE;
9120 break;
9121 }
9122 addend -= SYM_VAL (sda);
9123
9124 name = bfd_get_section_name (output_bfd, sec->output_section);
9125 if (!(strcmp (name, ".sdata") == 0
9126 || strcmp (name, ".sbss") == 0))
9127 {
9128 info->callbacks->einfo
9129 (_("%P: %B: the target (%s) of a %s relocation is "
9130 "in the wrong output section (%s)\n"),
9131 input_bfd,
9132 sym_name,
9133 howto->name,
9134 name);
9135 }
9136 }
9137 break;
9138
9139 /* Relocate against _SDA2_BASE_. */
9140 case R_PPC_EMB_SDA2REL:
9141 {
9142 const char *name;
9143 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9144
9145 if (sec == NULL
9146 || sec->output_section == NULL
9147 || !is_static_defined (sda))
9148 {
9149 unresolved_reloc = TRUE;
9150 break;
9151 }
9152 addend -= SYM_VAL (sda);
9153
9154 name = bfd_get_section_name (output_bfd, sec->output_section);
9155 if (!(strcmp (name, ".sdata2") == 0
9156 || strcmp (name, ".sbss2") == 0))
9157 {
9158 info->callbacks->einfo
9159 (_("%P: %B: the target (%s) of a %s relocation is "
9160 "in the wrong output section (%s)\n"),
9161 input_bfd,
9162 sym_name,
9163 howto->name,
9164 name);
9165 }
9166 }
9167 break;
9168
9169 case R_PPC_VLE_LO16A:
9170 relocation = relocation + addend;
9171 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9172 relocation, split16a_type);
9173 goto copy_reloc;
9174
9175 case R_PPC_VLE_LO16D:
9176 relocation = relocation + addend;
9177 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9178 relocation, split16d_type);
9179 goto copy_reloc;
9180
9181 case R_PPC_VLE_HI16A:
9182 relocation = (relocation + addend) >> 16;
9183 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9184 relocation, split16a_type);
9185 goto copy_reloc;
9186
9187 case R_PPC_VLE_HI16D:
9188 relocation = (relocation + addend) >> 16;
9189 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9190 relocation, split16d_type);
9191 goto copy_reloc;
9192
9193 case R_PPC_VLE_HA16A:
9194 relocation = (relocation + addend + 0x8000) >> 16;
9195 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9196 relocation, split16a_type);
9197 goto copy_reloc;
9198
9199 case R_PPC_VLE_HA16D:
9200 relocation = (relocation + addend + 0x8000) >> 16;
9201 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9202 relocation, split16d_type);
9203 goto copy_reloc;
9204
9205 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9206 case R_PPC_EMB_SDA21:
9207 case R_PPC_VLE_SDA21:
9208 case R_PPC_EMB_RELSDA:
9209 case R_PPC_VLE_SDA21_LO:
9210 {
9211 const char *name;
9212 int reg;
9213 unsigned int insn;
9214 struct elf_link_hash_entry *sda = NULL;
9215
9216 if (sec == NULL || sec->output_section == NULL)
9217 {
9218 unresolved_reloc = TRUE;
9219 break;
9220 }
9221
9222 name = bfd_get_section_name (output_bfd, sec->output_section);
9223 if (strcmp (name, ".sdata") == 0
9224 || strcmp (name, ".sbss") == 0)
9225 {
9226 reg = 13;
9227 sda = htab->sdata[0].sym;
9228 }
9229 else if (strcmp (name, ".sdata2") == 0
9230 || strcmp (name, ".sbss2") == 0)
9231 {
9232 reg = 2;
9233 sda = htab->sdata[1].sym;
9234 }
9235 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9236 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9237 {
9238 reg = 0;
9239 }
9240 else
9241 {
9242 info->callbacks->einfo
9243 (_("%P: %B: the target (%s) of a %s relocation is "
9244 "in the wrong output section (%s)\n"),
9245 input_bfd,
9246 sym_name,
9247 howto->name,
9248 name);
9249
9250 bfd_set_error (bfd_error_bad_value);
9251 ret = FALSE;
9252 goto copy_reloc;
9253 }
9254
9255 if (sda != NULL)
9256 {
9257 if (!is_static_defined (sda))
9258 {
9259 unresolved_reloc = TRUE;
9260 break;
9261 }
9262 addend -= SYM_VAL (sda);
9263 }
9264
9265 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9266 if (reg == 0
9267 && (r_type == R_PPC_VLE_SDA21
9268 || r_type == R_PPC_VLE_SDA21_LO))
9269 {
9270 relocation = relocation + addend;
9271 addend = 0;
9272
9273 /* Force e_li insn, keeping RT from original insn. */
9274 insn &= 0x1f << 21;
9275 insn |= 28u << 26;
9276
9277 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9278 /* Top 4 bits of value to 17..20. */
9279 insn |= (relocation & 0xf0000) >> 5;
9280 /* Next 5 bits of the value to 11..15. */
9281 insn |= (relocation & 0xf800) << 5;
9282 /* And the final 11 bits of the value to bits 21 to 31. */
9283 insn |= relocation & 0x7ff;
9284
9285 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9286
9287 if (r_type == R_PPC_VLE_SDA21
9288 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9289 goto overflow;
9290 goto copy_reloc;
9291 }
9292 else if (r_type == R_PPC_EMB_SDA21
9293 || r_type == R_PPC_VLE_SDA21
9294 || r_type == R_PPC_VLE_SDA21_LO)
9295 {
9296 /* Fill in register field. */
9297 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9298 }
9299 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9300 }
9301 break;
9302
9303 case R_PPC_VLE_SDAREL_LO16A:
9304 case R_PPC_VLE_SDAREL_LO16D:
9305 case R_PPC_VLE_SDAREL_HI16A:
9306 case R_PPC_VLE_SDAREL_HI16D:
9307 case R_PPC_VLE_SDAREL_HA16A:
9308 case R_PPC_VLE_SDAREL_HA16D:
9309 {
9310 bfd_vma value;
9311 const char *name;
9312 //int reg;
9313 struct elf_link_hash_entry *sda = NULL;
9314
9315 if (sec == NULL || sec->output_section == NULL)
9316 {
9317 unresolved_reloc = TRUE;
9318 break;
9319 }
9320
9321 name = bfd_get_section_name (output_bfd, sec->output_section);
9322 if (strcmp (name, ".sdata") == 0
9323 || strcmp (name, ".sbss") == 0)
9324 {
9325 //reg = 13;
9326 sda = htab->sdata[0].sym;
9327 }
9328 else if (strcmp (name, ".sdata2") == 0
9329 || strcmp (name, ".sbss2") == 0)
9330 {
9331 //reg = 2;
9332 sda = htab->sdata[1].sym;
9333 }
9334 else
9335 {
9336 (*_bfd_error_handler)
9337 (_("%B: the target (%s) of a %s relocation is "
9338 "in the wrong output section (%s)"),
9339 input_bfd,
9340 sym_name,
9341 howto->name,
9342 name);
9343
9344 bfd_set_error (bfd_error_bad_value);
9345 ret = FALSE;
9346 goto copy_reloc;
9347 }
9348
9349 if (sda != NULL)
9350 {
9351 if (!is_static_defined (sda))
9352 {
9353 unresolved_reloc = TRUE;
9354 break;
9355 }
9356 }
9357
9358 value = (sda->root.u.def.section->output_section->vma
9359 + sda->root.u.def.section->output_offset
9360 + addend);
9361
9362 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9363 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9364 value, split16a_type);
9365 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9366 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9367 value, split16d_type);
9368 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9369 {
9370 value = value >> 16;
9371 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9372 value, split16a_type);
9373 }
9374 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9375 {
9376 value = value >> 16;
9377 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9378 value, split16d_type);
9379 }
9380 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9381 {
9382 value = (value + 0x8000) >> 16;
9383 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9384 value, split16a_type);
9385 }
9386 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9387 {
9388 value = (value + 0x8000) >> 16;
9389 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9390 value, split16d_type);
9391 }
9392 }
9393 goto copy_reloc;
9394
9395 /* Relocate against the beginning of the section. */
9396 case R_PPC_SECTOFF:
9397 case R_PPC_SECTOFF_LO:
9398 case R_PPC_SECTOFF_HI:
9399 case R_PPC_SECTOFF_HA:
9400 if (sec == NULL || sec->output_section == NULL)
9401 {
9402 unresolved_reloc = TRUE;
9403 break;
9404 }
9405 addend -= sec->output_section->vma;
9406 break;
9407
9408 /* Negative relocations. */
9409 case R_PPC_EMB_NADDR32:
9410 case R_PPC_EMB_NADDR16:
9411 case R_PPC_EMB_NADDR16_LO:
9412 case R_PPC_EMB_NADDR16_HI:
9413 case R_PPC_EMB_NADDR16_HA:
9414 addend -= 2 * relocation;
9415 break;
9416
9417 case R_PPC_COPY:
9418 case R_PPC_GLOB_DAT:
9419 case R_PPC_JMP_SLOT:
9420 case R_PPC_RELATIVE:
9421 case R_PPC_IRELATIVE:
9422 case R_PPC_PLT32:
9423 case R_PPC_PLTREL32:
9424 case R_PPC_PLT16_LO:
9425 case R_PPC_PLT16_HI:
9426 case R_PPC_PLT16_HA:
9427 case R_PPC_ADDR30:
9428 case R_PPC_EMB_RELSEC16:
9429 case R_PPC_EMB_RELST_LO:
9430 case R_PPC_EMB_RELST_HI:
9431 case R_PPC_EMB_RELST_HA:
9432 case R_PPC_EMB_BIT_FLD:
9433 info->callbacks->einfo
9434 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9435 input_bfd,
9436 howto->name,
9437 sym_name);
9438
9439 bfd_set_error (bfd_error_invalid_operation);
9440 ret = FALSE;
9441 goto copy_reloc;
9442 }
9443
9444 /* Do any further special processing. */
9445 switch (r_type)
9446 {
9447 default:
9448 break;
9449
9450 case R_PPC_ADDR16_HA:
9451 case R_PPC_REL16_HA:
9452 case R_PPC_REL16DX_HA:
9453 case R_PPC_SECTOFF_HA:
9454 case R_PPC_TPREL16_HA:
9455 case R_PPC_DTPREL16_HA:
9456 case R_PPC_EMB_NADDR16_HA:
9457 case R_PPC_EMB_RELST_HA:
9458 /* It's just possible that this symbol is a weak symbol
9459 that's not actually defined anywhere. In that case,
9460 'sec' would be NULL, and we should leave the symbol
9461 alone (it will be set to zero elsewhere in the link). */
9462 if (sec == NULL)
9463 break;
9464 /* Fall thru */
9465
9466 case R_PPC_PLT16_HA:
9467 case R_PPC_GOT16_HA:
9468 case R_PPC_GOT_TLSGD16_HA:
9469 case R_PPC_GOT_TLSLD16_HA:
9470 case R_PPC_GOT_TPREL16_HA:
9471 case R_PPC_GOT_DTPREL16_HA:
9472 /* Add 0x10000 if sign bit in 0:15 is set.
9473 Bits 0:15 are not used. */
9474 addend += 0x8000;
9475 break;
9476
9477 case R_PPC_ADDR16:
9478 case R_PPC_ADDR16_LO:
9479 case R_PPC_GOT16:
9480 case R_PPC_GOT16_LO:
9481 case R_PPC_SDAREL16:
9482 case R_PPC_SECTOFF:
9483 case R_PPC_SECTOFF_LO:
9484 case R_PPC_DTPREL16:
9485 case R_PPC_DTPREL16_LO:
9486 case R_PPC_TPREL16:
9487 case R_PPC_TPREL16_LO:
9488 case R_PPC_GOT_TLSGD16:
9489 case R_PPC_GOT_TLSGD16_LO:
9490 case R_PPC_GOT_TLSLD16:
9491 case R_PPC_GOT_TLSLD16_LO:
9492 case R_PPC_GOT_DTPREL16:
9493 case R_PPC_GOT_DTPREL16_LO:
9494 case R_PPC_GOT_TPREL16:
9495 case R_PPC_GOT_TPREL16_LO:
9496 {
9497 /* The 32-bit ABI lacks proper relocations to deal with
9498 certain 64-bit instructions. Prevent damage to bits
9499 that make up part of the insn opcode. */
9500 unsigned int insn, mask, lobit;
9501
9502 insn = bfd_get_32 (output_bfd,
9503 contents + rel->r_offset - d_offset);
9504 mask = 0;
9505 if (is_insn_ds_form (insn))
9506 mask = 3;
9507 else if (is_insn_dq_form (insn))
9508 mask = 15;
9509 else
9510 break;
9511 relocation += addend;
9512 addend = insn & mask;
9513 lobit = mask & relocation;
9514 if (lobit != 0)
9515 {
9516 relocation ^= lobit;
9517 info->callbacks->einfo
9518 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9519 input_bfd, input_section, rel->r_offset,
9520 howto->name, sym_name, mask + 1);
9521 bfd_set_error (bfd_error_bad_value);
9522 ret = FALSE;
9523 }
9524 }
9525 break;
9526 }
9527
9528 #ifdef DEBUG
9529 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9530 "offset = %ld, addend = %ld\n",
9531 howto->name,
9532 (int) r_type,
9533 sym_name,
9534 r_symndx,
9535 (long) rel->r_offset,
9536 (long) addend);
9537 #endif
9538
9539 if (unresolved_reloc
9540 && !((input_section->flags & SEC_DEBUGGING) != 0
9541 && h->def_dynamic)
9542 && _bfd_elf_section_offset (output_bfd, info, input_section,
9543 rel->r_offset) != (bfd_vma) -1)
9544 {
9545 info->callbacks->einfo
9546 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9547 input_bfd, input_section, rel->r_offset,
9548 howto->name,
9549 sym_name);
9550 ret = FALSE;
9551 }
9552
9553 /* 16-bit fields in insns mostly have signed values, but a
9554 few insns have 16-bit unsigned values. Really, we should
9555 have different reloc types. */
9556 if (howto->complain_on_overflow != complain_overflow_dont
9557 && howto->dst_mask == 0xffff
9558 && (input_section->flags & SEC_CODE) != 0)
9559 {
9560 enum complain_overflow complain = complain_overflow_signed;
9561
9562 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9563 {
9564 unsigned int insn;
9565
9566 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9567 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9568 complain = complain_overflow_bitfield;
9569 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9570 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9571 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9572 complain = complain_overflow_unsigned;
9573 }
9574 if (howto->complain_on_overflow != complain)
9575 {
9576 alt_howto = *howto;
9577 alt_howto.complain_on_overflow = complain;
9578 howto = &alt_howto;
9579 }
9580 }
9581
9582 if (r_type == R_PPC_REL16DX_HA)
9583 {
9584 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9585 if (rel->r_offset + 4 > input_section->size)
9586 r = bfd_reloc_outofrange;
9587 else
9588 {
9589 unsigned int insn;
9590
9591 relocation += addend;
9592 relocation -= (rel->r_offset
9593 + input_section->output_offset
9594 + input_section->output_section->vma);
9595 relocation >>= 16;
9596 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9597 insn &= ~0x1fffc1;
9598 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9599 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9600 r = bfd_reloc_ok;
9601 }
9602 }
9603 else
9604 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9605 rel->r_offset, relocation, addend);
9606
9607 if (r != bfd_reloc_ok)
9608 {
9609 if (r == bfd_reloc_overflow)
9610 {
9611 overflow:
9612 /* On code like "if (foo) foo();" don't report overflow
9613 on a branch to zero when foo is undefined. */
9614 if (!warned
9615 && !(h != NULL
9616 && (h->root.type == bfd_link_hash_undefweak
9617 || h->root.type == bfd_link_hash_undefined)
9618 && is_branch_reloc (r_type)))
9619 info->callbacks->reloc_overflow
9620 (info, (h ? &h->root : NULL), sym_name, howto->name,
9621 rel->r_addend, input_bfd, input_section, rel->r_offset);
9622 }
9623 else
9624 {
9625 info->callbacks->einfo
9626 (_("%P: %H: %s reloc against `%s': error %d\n"),
9627 input_bfd, input_section, rel->r_offset,
9628 howto->name, sym_name, (int) r);
9629 ret = FALSE;
9630 }
9631 }
9632 copy_reloc:
9633 if (wrel != rel)
9634 *wrel = *rel;
9635 }
9636
9637 if (wrel != rel)
9638 {
9639 Elf_Internal_Shdr *rel_hdr;
9640 size_t deleted = rel - wrel;
9641
9642 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9643 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9644 if (rel_hdr->sh_size == 0)
9645 {
9646 /* It is too late to remove an empty reloc section. Leave
9647 one NONE reloc.
9648 ??? What is wrong with an empty section??? */
9649 rel_hdr->sh_size = rel_hdr->sh_entsize;
9650 deleted -= 1;
9651 wrel++;
9652 }
9653 relend = wrel;
9654 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9655 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9656 input_section->reloc_count -= deleted;
9657 }
9658
9659 #ifdef DEBUG
9660 fprintf (stderr, "\n");
9661 #endif
9662
9663 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9664 && input_section->size != input_section->rawsize
9665 && (strcmp (input_section->output_section->name, ".init") == 0
9666 || strcmp (input_section->output_section->name, ".fini") == 0))
9667 {
9668 /* Branch around the trampolines. */
9669 unsigned int insn = B + input_section->size - input_section->rawsize;
9670 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9671 }
9672
9673 if (htab->params->ppc476_workaround
9674 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9675 && (!bfd_link_relocatable (info)
9676 || (input_section->output_section->alignment_power
9677 >= htab->params->pagesize_p2)))
9678 {
9679 bfd_vma start_addr, end_addr, addr;
9680 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9681
9682 if (relax_info->workaround_size != 0)
9683 {
9684 bfd_byte *p;
9685 unsigned int n;
9686 bfd_byte fill[4];
9687
9688 bfd_put_32 (input_bfd, BA, fill);
9689 p = contents + input_section->size - relax_info->workaround_size;
9690 n = relax_info->workaround_size >> 2;
9691 while (n--)
9692 {
9693 memcpy (p, fill, 4);
9694 p += 4;
9695 }
9696 }
9697
9698 /* The idea is: Replace the last instruction on a page with a
9699 branch to a patch area. Put the insn there followed by a
9700 branch back to the next page. Complicated a little by
9701 needing to handle moved conditional branches, and by not
9702 wanting to touch data-in-text. */
9703
9704 start_addr = (input_section->output_section->vma
9705 + input_section->output_offset);
9706 end_addr = (start_addr + input_section->size
9707 - relax_info->workaround_size);
9708 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9709 addr < end_addr;
9710 addr += pagesize)
9711 {
9712 bfd_vma offset = addr - start_addr;
9713 Elf_Internal_Rela *lo, *hi;
9714 bfd_boolean is_data;
9715 bfd_vma patch_off, patch_addr;
9716 unsigned int insn;
9717
9718 /* Do we have a data reloc at this offset? If so, leave
9719 the word alone. */
9720 is_data = FALSE;
9721 lo = relocs;
9722 hi = relend;
9723 rel = NULL;
9724 while (lo < hi)
9725 {
9726 rel = lo + (hi - lo) / 2;
9727 if (rel->r_offset < offset)
9728 lo = rel + 1;
9729 else if (rel->r_offset > offset + 3)
9730 hi = rel;
9731 else
9732 {
9733 switch (ELF32_R_TYPE (rel->r_info))
9734 {
9735 case R_PPC_ADDR32:
9736 case R_PPC_UADDR32:
9737 case R_PPC_REL32:
9738 case R_PPC_ADDR30:
9739 is_data = TRUE;
9740 break;
9741 default:
9742 break;
9743 }
9744 break;
9745 }
9746 }
9747 if (is_data)
9748 continue;
9749
9750 /* Some instructions can be left alone too. Unconditional
9751 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9752 avoid the icache failure.
9753
9754 The problem occurs due to prefetch across a page boundary
9755 where stale instructions can be fetched from the next
9756 page, and the mechanism for flushing these bad
9757 instructions fails under certain circumstances. The
9758 unconditional branches:
9759 1) Branch: b, bl, ba, bla,
9760 2) Branch Conditional: bc, bca, bcl, bcla,
9761 3) Branch Conditional to Link Register: bclr, bclrl,
9762 where (2) and (3) have BO=0x14 making them unconditional,
9763 prevent the bad prefetch because the prefetch itself is
9764 affected by these instructions. This happens even if the
9765 instruction is not executed.
9766
9767 A bctr example:
9768 .
9769 . lis 9,new_page@ha
9770 . addi 9,9,new_page@l
9771 . mtctr 9
9772 . bctr
9773 . nop
9774 . nop
9775 . new_page:
9776 .
9777 The bctr is not predicted taken due to ctr not being
9778 ready, so prefetch continues on past the bctr into the
9779 new page which might have stale instructions. If they
9780 fail to be flushed, then they will be executed after the
9781 bctr executes. Either of the following modifications
9782 prevent the bad prefetch from happening in the first
9783 place:
9784 .
9785 . lis 9,new_page@ha lis 9,new_page@ha
9786 . addi 9,9,new_page@l addi 9,9,new_page@l
9787 . mtctr 9 mtctr 9
9788 . bctr bctr
9789 . nop b somewhere_else
9790 . b somewhere_else nop
9791 . new_page: new_page:
9792 . */
9793 insn = bfd_get_32 (input_bfd, contents + offset);
9794 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9795 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9796 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9797 || ((insn & (0x3f << 26)) == (19u << 26)
9798 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9799 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9800 continue;
9801
9802 patch_addr = (start_addr + input_section->size
9803 - relax_info->workaround_size);
9804 patch_addr = (patch_addr + 15) & -16;
9805 patch_off = patch_addr - start_addr;
9806 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9807
9808 if (rel != NULL
9809 && rel->r_offset >= offset
9810 && rel->r_offset < offset + 4)
9811 {
9812 asection *sreloc;
9813
9814 /* If the insn we are patching had a reloc, adjust the
9815 reloc r_offset so that the reloc applies to the moved
9816 location. This matters for -r and --emit-relocs. */
9817 if (rel + 1 != relend)
9818 {
9819 Elf_Internal_Rela tmp = *rel;
9820
9821 /* Keep the relocs sorted by r_offset. */
9822 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9823 relend[-1] = tmp;
9824 }
9825 relend[-1].r_offset += patch_off - offset;
9826
9827 /* Adjust REL16 addends too. */
9828 switch (ELF32_R_TYPE (relend[-1].r_info))
9829 {
9830 case R_PPC_REL16:
9831 case R_PPC_REL16_LO:
9832 case R_PPC_REL16_HI:
9833 case R_PPC_REL16_HA:
9834 relend[-1].r_addend += patch_off - offset;
9835 break;
9836 default:
9837 break;
9838 }
9839
9840 /* If we are building a PIE or shared library with
9841 non-PIC objects, perhaps we had a dynamic reloc too?
9842 If so, the dynamic reloc must move with the insn. */
9843 sreloc = elf_section_data (input_section)->sreloc;
9844 if (sreloc != NULL)
9845 {
9846 Elf32_External_Rela *slo, *shi, *srelend;
9847 bfd_vma soffset;
9848
9849 slo = (Elf32_External_Rela *) sreloc->contents;
9850 shi = srelend = slo + sreloc->reloc_count;
9851 soffset = (offset + input_section->output_section->vma
9852 + input_section->output_offset);
9853 while (slo < shi)
9854 {
9855 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9856 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9857 &outrel);
9858 if (outrel.r_offset < soffset)
9859 slo = srel + 1;
9860 else if (outrel.r_offset > soffset + 3)
9861 shi = srel;
9862 else
9863 {
9864 if (srel + 1 != srelend)
9865 {
9866 memmove (srel, srel + 1,
9867 (srelend - (srel + 1)) * sizeof (*srel));
9868 srel = srelend - 1;
9869 }
9870 outrel.r_offset += patch_off - offset;
9871 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9872 (bfd_byte *) srel);
9873 break;
9874 }
9875 }
9876 }
9877 }
9878 else
9879 rel = NULL;
9880
9881 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9882 && (insn & 2) == 0 /* relative */)
9883 {
9884 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9885
9886 delta += offset - patch_off;
9887 if (bfd_link_relocatable (info) && rel != NULL)
9888 delta = 0;
9889 if (!bfd_link_relocatable (info) && rel != NULL)
9890 {
9891 enum elf_ppc_reloc_type r_type;
9892
9893 r_type = ELF32_R_TYPE (relend[-1].r_info);
9894 if (r_type == R_PPC_REL14_BRTAKEN)
9895 insn |= BRANCH_PREDICT_BIT;
9896 else if (r_type == R_PPC_REL14_BRNTAKEN)
9897 insn &= ~BRANCH_PREDICT_BIT;
9898 else
9899 BFD_ASSERT (r_type == R_PPC_REL14);
9900
9901 if ((r_type == R_PPC_REL14_BRTAKEN
9902 || r_type == R_PPC_REL14_BRNTAKEN)
9903 && delta + 0x8000 < 0x10000
9904 && (bfd_signed_vma) delta < 0)
9905 insn ^= BRANCH_PREDICT_BIT;
9906 }
9907 if (delta + 0x8000 < 0x10000)
9908 {
9909 bfd_put_32 (input_bfd,
9910 (insn & ~0xfffc) | (delta & 0xfffc),
9911 contents + patch_off);
9912 patch_off += 4;
9913 bfd_put_32 (input_bfd,
9914 B | ((offset + 4 - patch_off) & 0x3fffffc),
9915 contents + patch_off);
9916 patch_off += 4;
9917 }
9918 else
9919 {
9920 if (rel != NULL)
9921 {
9922 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9923
9924 relend[-1].r_offset += 8;
9925 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9926 }
9927 bfd_put_32 (input_bfd,
9928 (insn & ~0xfffc) | 8,
9929 contents + patch_off);
9930 patch_off += 4;
9931 bfd_put_32 (input_bfd,
9932 B | ((offset + 4 - patch_off) & 0x3fffffc),
9933 contents + patch_off);
9934 patch_off += 4;
9935 bfd_put_32 (input_bfd,
9936 B | ((delta - 8) & 0x3fffffc),
9937 contents + patch_off);
9938 patch_off += 4;
9939 }
9940 }
9941 else
9942 {
9943 bfd_put_32 (input_bfd, insn, contents + patch_off);
9944 patch_off += 4;
9945 bfd_put_32 (input_bfd,
9946 B | ((offset + 4 - patch_off) & 0x3fffffc),
9947 contents + patch_off);
9948 patch_off += 4;
9949 }
9950 BFD_ASSERT (patch_off <= input_section->size);
9951 relax_info->workaround_size = input_section->size - patch_off;
9952 }
9953 }
9954
9955 return ret;
9956 }
9957 \f
9958 /* Finish up dynamic symbol handling. We set the contents of various
9959 dynamic sections here. */
9960
9961 static bfd_boolean
9962 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9963 struct bfd_link_info *info,
9964 struct elf_link_hash_entry *h,
9965 Elf_Internal_Sym *sym)
9966 {
9967 struct ppc_elf_link_hash_table *htab;
9968 struct plt_entry *ent;
9969 bfd_boolean doneone;
9970
9971 #ifdef DEBUG
9972 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9973 h->root.root.string);
9974 #endif
9975
9976 htab = ppc_elf_hash_table (info);
9977 BFD_ASSERT (htab->elf.dynobj != NULL);
9978
9979 doneone = FALSE;
9980 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9981 if (ent->plt.offset != (bfd_vma) -1)
9982 {
9983 if (!doneone)
9984 {
9985 Elf_Internal_Rela rela;
9986 bfd_byte *loc;
9987 bfd_vma reloc_index;
9988
9989 if (htab->plt_type == PLT_NEW
9990 || !htab->elf.dynamic_sections_created
9991 || h->dynindx == -1)
9992 reloc_index = ent->plt.offset / 4;
9993 else
9994 {
9995 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9996 / htab->plt_slot_size);
9997 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9998 && htab->plt_type == PLT_OLD)
9999 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10000 }
10001
10002 /* This symbol has an entry in the procedure linkage table.
10003 Set it up. */
10004 if (htab->plt_type == PLT_VXWORKS
10005 && htab->elf.dynamic_sections_created
10006 && h->dynindx != -1)
10007 {
10008 bfd_vma got_offset;
10009 const bfd_vma *plt_entry;
10010
10011 /* The first three entries in .got.plt are reserved. */
10012 got_offset = (reloc_index + 3) * 4;
10013
10014 /* Use the right PLT. */
10015 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10016 : ppc_elf_vxworks_plt_entry;
10017
10018 /* Fill in the .plt on VxWorks. */
10019 if (bfd_link_pic (info))
10020 {
10021 bfd_put_32 (output_bfd,
10022 plt_entry[0] | PPC_HA (got_offset),
10023 htab->plt->contents + ent->plt.offset + 0);
10024 bfd_put_32 (output_bfd,
10025 plt_entry[1] | PPC_LO (got_offset),
10026 htab->plt->contents + ent->plt.offset + 4);
10027 }
10028 else
10029 {
10030 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10031
10032 bfd_put_32 (output_bfd,
10033 plt_entry[0] | PPC_HA (got_loc),
10034 htab->plt->contents + ent->plt.offset + 0);
10035 bfd_put_32 (output_bfd,
10036 plt_entry[1] | PPC_LO (got_loc),
10037 htab->plt->contents + ent->plt.offset + 4);
10038 }
10039
10040 bfd_put_32 (output_bfd, plt_entry[2],
10041 htab->plt->contents + ent->plt.offset + 8);
10042 bfd_put_32 (output_bfd, plt_entry[3],
10043 htab->plt->contents + ent->plt.offset + 12);
10044
10045 /* This instruction is an immediate load. The value loaded is
10046 the byte offset of the R_PPC_JMP_SLOT relocation from the
10047 start of the .rela.plt section. The value is stored in the
10048 low-order 16 bits of the load instruction. */
10049 /* NOTE: It appears that this is now an index rather than a
10050 prescaled offset. */
10051 bfd_put_32 (output_bfd,
10052 plt_entry[4] | reloc_index,
10053 htab->plt->contents + ent->plt.offset + 16);
10054 /* This instruction is a PC-relative branch whose target is
10055 the start of the PLT section. The address of this branch
10056 instruction is 20 bytes beyond the start of this PLT entry.
10057 The address is encoded in bits 6-29, inclusive. The value
10058 stored is right-shifted by two bits, permitting a 26-bit
10059 offset. */
10060 bfd_put_32 (output_bfd,
10061 (plt_entry[5]
10062 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10063 htab->plt->contents + ent->plt.offset + 20);
10064 bfd_put_32 (output_bfd, plt_entry[6],
10065 htab->plt->contents + ent->plt.offset + 24);
10066 bfd_put_32 (output_bfd, plt_entry[7],
10067 htab->plt->contents + ent->plt.offset + 28);
10068
10069 /* Fill in the GOT entry corresponding to this PLT slot with
10070 the address immediately after the "bctr" instruction
10071 in this PLT entry. */
10072 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
10073 + htab->plt->output_offset
10074 + ent->plt.offset + 16),
10075 htab->sgotplt->contents + got_offset);
10076
10077 if (!bfd_link_pic (info))
10078 {
10079 /* Fill in a couple of entries in .rela.plt.unloaded. */
10080 loc = htab->srelplt2->contents
10081 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10082 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10083 * sizeof (Elf32_External_Rela));
10084
10085 /* Provide the @ha relocation for the first instruction. */
10086 rela.r_offset = (htab->plt->output_section->vma
10087 + htab->plt->output_offset
10088 + ent->plt.offset + 2);
10089 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10090 R_PPC_ADDR16_HA);
10091 rela.r_addend = got_offset;
10092 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10093 loc += sizeof (Elf32_External_Rela);
10094
10095 /* Provide the @l relocation for the second instruction. */
10096 rela.r_offset = (htab->plt->output_section->vma
10097 + htab->plt->output_offset
10098 + ent->plt.offset + 6);
10099 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10100 R_PPC_ADDR16_LO);
10101 rela.r_addend = got_offset;
10102 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10103 loc += sizeof (Elf32_External_Rela);
10104
10105 /* Provide a relocation for the GOT entry corresponding to this
10106 PLT slot. Point it at the middle of the .plt entry. */
10107 rela.r_offset = (htab->sgotplt->output_section->vma
10108 + htab->sgotplt->output_offset
10109 + got_offset);
10110 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10111 R_PPC_ADDR32);
10112 rela.r_addend = ent->plt.offset + 16;
10113 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10114 }
10115
10116 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10117 In particular, the offset for the relocation is not the
10118 address of the PLT entry for this function, as specified
10119 by the ABI. Instead, the offset is set to the address of
10120 the GOT slot for this function. See EABI 4.4.4.1. */
10121 rela.r_offset = (htab->sgotplt->output_section->vma
10122 + htab->sgotplt->output_offset
10123 + got_offset);
10124
10125 }
10126 else
10127 {
10128 asection *splt = htab->plt;
10129 if (!htab->elf.dynamic_sections_created
10130 || h->dynindx == -1)
10131 splt = htab->iplt;
10132
10133 rela.r_offset = (splt->output_section->vma
10134 + splt->output_offset
10135 + ent->plt.offset);
10136 if (htab->plt_type == PLT_OLD
10137 || !htab->elf.dynamic_sections_created
10138 || h->dynindx == -1)
10139 {
10140 /* We don't need to fill in the .plt. The ppc dynamic
10141 linker will fill it in. */
10142 }
10143 else
10144 {
10145 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10146 + htab->glink->output_section->vma
10147 + htab->glink->output_offset);
10148 bfd_put_32 (output_bfd, val,
10149 splt->contents + ent->plt.offset);
10150 }
10151 }
10152
10153 /* Fill in the entry in the .rela.plt section. */
10154 rela.r_addend = 0;
10155 if (!htab->elf.dynamic_sections_created
10156 || h->dynindx == -1)
10157 {
10158 BFD_ASSERT (h->type == STT_GNU_IFUNC
10159 && h->def_regular
10160 && (h->root.type == bfd_link_hash_defined
10161 || h->root.type == bfd_link_hash_defweak));
10162 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10163 rela.r_addend = SYM_VAL (h);
10164 }
10165 else
10166 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10167
10168 if (!htab->elf.dynamic_sections_created
10169 || h->dynindx == -1)
10170 loc = (htab->reliplt->contents
10171 + (htab->reliplt->reloc_count++
10172 * sizeof (Elf32_External_Rela)));
10173 else
10174 loc = (htab->relplt->contents
10175 + reloc_index * sizeof (Elf32_External_Rela));
10176 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10177
10178 if (!h->def_regular)
10179 {
10180 /* Mark the symbol as undefined, rather than as
10181 defined in the .plt section. Leave the value if
10182 there were any relocations where pointer equality
10183 matters (this is a clue for the dynamic linker, to
10184 make function pointer comparisons work between an
10185 application and shared library), otherwise set it
10186 to zero. */
10187 sym->st_shndx = SHN_UNDEF;
10188 if (!h->pointer_equality_needed)
10189 sym->st_value = 0;
10190 else if (!h->ref_regular_nonweak)
10191 {
10192 /* This breaks function pointer comparisons, but
10193 that is better than breaking tests for a NULL
10194 function pointer. */
10195 sym->st_value = 0;
10196 }
10197 }
10198 else if (h->type == STT_GNU_IFUNC
10199 && !bfd_link_pic (info))
10200 {
10201 /* Set the value of ifunc symbols in a non-pie
10202 executable to the glink entry. This is to avoid
10203 text relocations. We can't do this for ifunc in
10204 allocate_dynrelocs, as we do for normal dynamic
10205 function symbols with plt entries, because we need
10206 to keep the original value around for the ifunc
10207 relocation. */
10208 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10209 (output_bfd, htab->glink->output_section));
10210 sym->st_value = (ent->glink_offset
10211 + htab->glink->output_offset
10212 + htab->glink->output_section->vma);
10213 }
10214 doneone = TRUE;
10215 }
10216
10217 if (htab->plt_type == PLT_NEW
10218 || !htab->elf.dynamic_sections_created
10219 || h->dynindx == -1)
10220 {
10221 unsigned char *p;
10222 asection *splt = htab->plt;
10223 if (!htab->elf.dynamic_sections_created
10224 || h->dynindx == -1)
10225 splt = htab->iplt;
10226
10227 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10228
10229 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10230 {
10231 bfd_put_32 (output_bfd, LWZ_11_3, p);
10232 p += 4;
10233 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10234 p += 4;
10235 bfd_put_32 (output_bfd, MR_0_3, p);
10236 p += 4;
10237 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10238 p += 4;
10239 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10240 p += 4;
10241 bfd_put_32 (output_bfd, BEQLR, p);
10242 p += 4;
10243 bfd_put_32 (output_bfd, MR_3_0, p);
10244 p += 4;
10245 bfd_put_32 (output_bfd, NOP, p);
10246 p += 4;
10247 }
10248
10249 write_glink_stub (ent, splt, p, info);
10250
10251 if (!bfd_link_pic (info))
10252 /* We only need one non-PIC glink stub. */
10253 break;
10254 }
10255 else
10256 break;
10257 }
10258
10259 if (h->needs_copy)
10260 {
10261 asection *s;
10262 Elf_Internal_Rela rela;
10263 bfd_byte *loc;
10264
10265 /* This symbols needs a copy reloc. Set it up. */
10266
10267 #ifdef DEBUG
10268 fprintf (stderr, ", copy");
10269 #endif
10270
10271 BFD_ASSERT (h->dynindx != -1);
10272
10273 if (ppc_elf_hash_entry (h)->has_sda_refs)
10274 s = htab->relsbss;
10275 else
10276 s = htab->relbss;
10277 BFD_ASSERT (s != NULL);
10278
10279 rela.r_offset = SYM_VAL (h);
10280 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10281 rela.r_addend = 0;
10282 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10283 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10284 }
10285
10286 #ifdef DEBUG
10287 fprintf (stderr, "\n");
10288 #endif
10289
10290 return TRUE;
10291 }
10292 \f
10293 static enum elf_reloc_type_class
10294 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10295 const asection *rel_sec,
10296 const Elf_Internal_Rela *rela)
10297 {
10298 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10299
10300 if (rel_sec == htab->reliplt)
10301 return reloc_class_ifunc;
10302
10303 switch (ELF32_R_TYPE (rela->r_info))
10304 {
10305 case R_PPC_RELATIVE:
10306 return reloc_class_relative;
10307 case R_PPC_JMP_SLOT:
10308 return reloc_class_plt;
10309 case R_PPC_COPY:
10310 return reloc_class_copy;
10311 default:
10312 return reloc_class_normal;
10313 }
10314 }
10315 \f
10316 /* Finish up the dynamic sections. */
10317
10318 static bfd_boolean
10319 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10320 struct bfd_link_info *info)
10321 {
10322 asection *sdyn;
10323 asection *splt;
10324 struct ppc_elf_link_hash_table *htab;
10325 bfd_vma got;
10326 bfd *dynobj;
10327 bfd_boolean ret = TRUE;
10328
10329 #ifdef DEBUG
10330 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10331 #endif
10332
10333 htab = ppc_elf_hash_table (info);
10334 dynobj = elf_hash_table (info)->dynobj;
10335 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10336 if (htab->is_vxworks)
10337 splt = bfd_get_linker_section (dynobj, ".plt");
10338 else
10339 splt = NULL;
10340
10341 got = 0;
10342 if (htab->elf.hgot != NULL)
10343 got = SYM_VAL (htab->elf.hgot);
10344
10345 if (htab->elf.dynamic_sections_created)
10346 {
10347 Elf32_External_Dyn *dyncon, *dynconend;
10348
10349 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
10350
10351 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10352 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10353 for (; dyncon < dynconend; dyncon++)
10354 {
10355 Elf_Internal_Dyn dyn;
10356 asection *s;
10357
10358 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10359
10360 switch (dyn.d_tag)
10361 {
10362 case DT_PLTGOT:
10363 if (htab->is_vxworks)
10364 s = htab->sgotplt;
10365 else
10366 s = htab->plt;
10367 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10368 break;
10369
10370 case DT_PLTRELSZ:
10371 dyn.d_un.d_val = htab->relplt->size;
10372 break;
10373
10374 case DT_JMPREL:
10375 s = htab->relplt;
10376 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10377 break;
10378
10379 case DT_PPC_GOT:
10380 dyn.d_un.d_ptr = got;
10381 break;
10382
10383 case DT_RELASZ:
10384 if (htab->is_vxworks)
10385 {
10386 if (htab->relplt)
10387 dyn.d_un.d_ptr -= htab->relplt->size;
10388 break;
10389 }
10390 continue;
10391
10392 default:
10393 if (htab->is_vxworks
10394 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10395 break;
10396 continue;
10397 }
10398
10399 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10400 }
10401 }
10402
10403 if (htab->got != NULL)
10404 {
10405 if (htab->elf.hgot->root.u.def.section == htab->got
10406 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
10407 {
10408 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10409
10410 p += htab->elf.hgot->root.u.def.value;
10411 if (htab->plt_type == PLT_OLD)
10412 {
10413 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10414 so that a function can easily find the address of
10415 _GLOBAL_OFFSET_TABLE_. */
10416 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10417 < htab->elf.hgot->root.u.def.section->size);
10418 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10419 }
10420
10421 if (sdyn != NULL)
10422 {
10423 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10424 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10425 < htab->elf.hgot->root.u.def.section->size);
10426 bfd_put_32 (output_bfd, val, p);
10427 }
10428 }
10429 else
10430 {
10431 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10432 htab->elf.hgot->root.root.string,
10433 (htab->sgotplt != NULL
10434 ? htab->sgotplt->name : htab->got->name));
10435 bfd_set_error (bfd_error_bad_value);
10436 ret = FALSE;
10437 }
10438
10439 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
10440 }
10441
10442 /* Fill in the first entry in the VxWorks procedure linkage table. */
10443 if (splt && splt->size > 0)
10444 {
10445 /* Use the right PLT. */
10446 const bfd_vma *plt_entry = (bfd_link_pic (info)
10447 ? ppc_elf_vxworks_pic_plt0_entry
10448 : ppc_elf_vxworks_plt0_entry);
10449
10450 if (!bfd_link_pic (info))
10451 {
10452 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10453
10454 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10455 splt->contents + 0);
10456 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10457 splt->contents + 4);
10458 }
10459 else
10460 {
10461 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10462 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10463 }
10464 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10465 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10466 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10467 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10468 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10469 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10470
10471 if (! bfd_link_pic (info))
10472 {
10473 Elf_Internal_Rela rela;
10474 bfd_byte *loc;
10475
10476 loc = htab->srelplt2->contents;
10477
10478 /* Output the @ha relocation for the first instruction. */
10479 rela.r_offset = (htab->plt->output_section->vma
10480 + htab->plt->output_offset
10481 + 2);
10482 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10483 rela.r_addend = 0;
10484 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10485 loc += sizeof (Elf32_External_Rela);
10486
10487 /* Output the @l relocation for the second instruction. */
10488 rela.r_offset = (htab->plt->output_section->vma
10489 + htab->plt->output_offset
10490 + 6);
10491 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10492 rela.r_addend = 0;
10493 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10494 loc += sizeof (Elf32_External_Rela);
10495
10496 /* Fix up the remaining relocations. They may have the wrong
10497 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10498 in which symbols were output. */
10499 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10500 {
10501 Elf_Internal_Rela rel;
10502
10503 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10504 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10505 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10506 loc += sizeof (Elf32_External_Rela);
10507
10508 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10509 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10510 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10511 loc += sizeof (Elf32_External_Rela);
10512
10513 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10514 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10515 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10516 loc += sizeof (Elf32_External_Rela);
10517 }
10518 }
10519 }
10520
10521 if (htab->glink != NULL
10522 && htab->glink->contents != NULL
10523 && htab->elf.dynamic_sections_created)
10524 {
10525 unsigned char *p;
10526 unsigned char *endp;
10527 bfd_vma res0;
10528 unsigned int i;
10529
10530 /*
10531 * PIC glink code is the following:
10532 *
10533 * # ith PLT code stub.
10534 * addis 11,30,(plt+(i-1)*4-got)@ha
10535 * lwz 11,(plt+(i-1)*4-got)@l(11)
10536 * mtctr 11
10537 * bctr
10538 *
10539 * # A table of branches, one for each plt entry.
10540 * # The idea is that the plt call stub loads ctr and r11 with these
10541 * # addresses, so (r11 - res_0) gives the plt index * 4.
10542 * res_0: b PLTresolve
10543 * res_1: b PLTresolve
10544 * .
10545 * # Some number of entries towards the end can be nops
10546 * res_n_m3: nop
10547 * res_n_m2: nop
10548 * res_n_m1:
10549 *
10550 * PLTresolve:
10551 * addis 11,11,(1f-res_0)@ha
10552 * mflr 0
10553 * bcl 20,31,1f
10554 * 1: addi 11,11,(1b-res_0)@l
10555 * mflr 12
10556 * mtlr 0
10557 * sub 11,11,12 # r11 = index * 4
10558 * addis 12,12,(got+4-1b)@ha
10559 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10560 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10561 * mtctr 0
10562 * add 0,11,11
10563 * add 11,0,11 # r11 = index * 12 = reloc offset.
10564 * bctr
10565 */
10566 static const unsigned int pic_plt_resolve[] =
10567 {
10568 ADDIS_11_11,
10569 MFLR_0,
10570 BCL_20_31,
10571 ADDI_11_11,
10572 MFLR_12,
10573 MTLR_0,
10574 SUB_11_11_12,
10575 ADDIS_12_12,
10576 LWZ_0_12,
10577 LWZ_12_12,
10578 MTCTR_0,
10579 ADD_0_11_11,
10580 ADD_11_0_11,
10581 BCTR,
10582 NOP,
10583 NOP
10584 };
10585
10586 /*
10587 * Non-PIC glink code is a little simpler.
10588 *
10589 * # ith PLT code stub.
10590 * lis 11,(plt+(i-1)*4)@ha
10591 * lwz 11,(plt+(i-1)*4)@l(11)
10592 * mtctr 11
10593 * bctr
10594 *
10595 * The branch table is the same, then comes
10596 *
10597 * PLTresolve:
10598 * lis 12,(got+4)@ha
10599 * addis 11,11,(-res_0)@ha
10600 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10601 * addi 11,11,(-res_0)@l # r11 = index * 4
10602 * mtctr 0
10603 * add 0,11,11
10604 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10605 * add 11,0,11 # r11 = index * 12 = reloc offset.
10606 * bctr
10607 */
10608 static const unsigned int plt_resolve[] =
10609 {
10610 LIS_12,
10611 ADDIS_11_11,
10612 LWZ_0_12,
10613 ADDI_11_11,
10614 MTCTR_0,
10615 ADD_0_11_11,
10616 LWZ_12_12,
10617 ADD_11_0_11,
10618 BCTR,
10619 NOP,
10620 NOP,
10621 NOP,
10622 NOP,
10623 NOP,
10624 NOP,
10625 NOP
10626 };
10627
10628 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10629 abort ();
10630 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10631 abort ();
10632
10633 /* Build the branch table, one for each plt entry (less one),
10634 and perhaps some padding. */
10635 p = htab->glink->contents;
10636 p += htab->glink_pltresolve;
10637 endp = htab->glink->contents;
10638 endp += htab->glink->size - GLINK_PLTRESOLVE;
10639 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10640 {
10641 bfd_put_32 (output_bfd, B + endp - p, p);
10642 p += 4;
10643 }
10644 while (p < endp)
10645 {
10646 bfd_put_32 (output_bfd, NOP, p);
10647 p += 4;
10648 }
10649
10650 res0 = (htab->glink_pltresolve
10651 + htab->glink->output_section->vma
10652 + htab->glink->output_offset);
10653
10654 if (htab->params->ppc476_workaround)
10655 {
10656 /* Ensure that a call stub at the end of a page doesn't
10657 result in prefetch over the end of the page into the
10658 glink branch table. */
10659 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10660 bfd_vma page_addr;
10661 bfd_vma glink_start = (htab->glink->output_section->vma
10662 + htab->glink->output_offset);
10663
10664 for (page_addr = res0 & -pagesize;
10665 page_addr > glink_start;
10666 page_addr -= pagesize)
10667 {
10668 /* We have a plt call stub that may need fixing. */
10669 bfd_byte *loc;
10670 unsigned int insn;
10671
10672 loc = htab->glink->contents + page_addr - 4 - glink_start;
10673 insn = bfd_get_32 (output_bfd, loc);
10674 if (insn == BCTR)
10675 {
10676 /* By alignment, we know that there must be at least
10677 one other call stub before this one. */
10678 insn = bfd_get_32 (output_bfd, loc - 16);
10679 if (insn == BCTR)
10680 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10681 else
10682 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10683 }
10684 }
10685 }
10686
10687 /* Last comes the PLTresolve stub. */
10688 if (bfd_link_pic (info))
10689 {
10690 bfd_vma bcl;
10691
10692 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10693 {
10694 unsigned int insn = pic_plt_resolve[i];
10695
10696 if (htab->params->ppc476_workaround && insn == NOP)
10697 insn = BA + 0;
10698 bfd_put_32 (output_bfd, insn, p);
10699 p += 4;
10700 }
10701 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10702
10703 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10704 + htab->glink->output_section->vma
10705 + htab->glink->output_offset);
10706
10707 bfd_put_32 (output_bfd,
10708 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10709 bfd_put_32 (output_bfd,
10710 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10711 bfd_put_32 (output_bfd,
10712 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10713 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10714 {
10715 bfd_put_32 (output_bfd,
10716 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10717 bfd_put_32 (output_bfd,
10718 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10719 }
10720 else
10721 {
10722 bfd_put_32 (output_bfd,
10723 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10724 bfd_put_32 (output_bfd,
10725 LWZ_12_12 + 4, p + 9*4);
10726 }
10727 }
10728 else
10729 {
10730 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10731 {
10732 unsigned int insn = plt_resolve[i];
10733
10734 if (htab->params->ppc476_workaround && insn == NOP)
10735 insn = BA + 0;
10736 bfd_put_32 (output_bfd, insn, p);
10737 p += 4;
10738 }
10739 p -= 4 * ARRAY_SIZE (plt_resolve);
10740
10741 bfd_put_32 (output_bfd,
10742 LIS_12 + PPC_HA (got + 4), p + 0*4);
10743 bfd_put_32 (output_bfd,
10744 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10745 bfd_put_32 (output_bfd,
10746 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10747 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10748 {
10749 bfd_put_32 (output_bfd,
10750 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10751 bfd_put_32 (output_bfd,
10752 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10753 }
10754 else
10755 {
10756 bfd_put_32 (output_bfd,
10757 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10758 bfd_put_32 (output_bfd,
10759 LWZ_12_12 + 4, p + 6*4);
10760 }
10761 }
10762 }
10763
10764 if (htab->glink_eh_frame != NULL
10765 && htab->glink_eh_frame->contents != NULL)
10766 {
10767 unsigned char *p = htab->glink_eh_frame->contents;
10768 bfd_vma val;
10769
10770 p += sizeof (glink_eh_frame_cie);
10771 /* FDE length. */
10772 p += 4;
10773 /* CIE pointer. */
10774 p += 4;
10775 /* Offset to .glink. */
10776 val = (htab->glink->output_section->vma
10777 + htab->glink->output_offset);
10778 val -= (htab->glink_eh_frame->output_section->vma
10779 + htab->glink_eh_frame->output_offset);
10780 val -= p - htab->glink_eh_frame->contents;
10781 bfd_put_32 (htab->elf.dynobj, val, p);
10782
10783 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10784 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10785 htab->glink_eh_frame,
10786 htab->glink_eh_frame->contents))
10787 return FALSE;
10788 }
10789
10790 return ret;
10791 }
10792 \f
10793 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10794 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10795 #define TARGET_BIG_SYM powerpc_elf32_vec
10796 #define TARGET_BIG_NAME "elf32-powerpc"
10797 #define ELF_ARCH bfd_arch_powerpc
10798 #define ELF_TARGET_ID PPC32_ELF_DATA
10799 #define ELF_MACHINE_CODE EM_PPC
10800 #ifdef __QNXTARGET__
10801 #define ELF_MAXPAGESIZE 0x1000
10802 #define ELF_COMMONPAGESIZE 0x1000
10803 #else
10804 #define ELF_MAXPAGESIZE 0x10000
10805 #define ELF_COMMONPAGESIZE 0x10000
10806 #endif
10807 #define ELF_MINPAGESIZE 0x1000
10808 #define elf_info_to_howto ppc_elf_info_to_howto
10809
10810 #ifdef EM_CYGNUS_POWERPC
10811 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10812 #endif
10813
10814 #ifdef EM_PPC_OLD
10815 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10816 #endif
10817
10818 #define elf_backend_plt_not_loaded 1
10819 #define elf_backend_can_gc_sections 1
10820 #define elf_backend_can_refcount 1
10821 #define elf_backend_rela_normal 1
10822 #define elf_backend_caches_rawsize 1
10823
10824 #define bfd_elf32_mkobject ppc_elf_mkobject
10825 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10826 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10827 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10828 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10829 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10830 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10831 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10832
10833 #define elf_backend_object_p ppc_elf_object_p
10834 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10835 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10836 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10837 #define elf_backend_relocate_section ppc_elf_relocate_section
10838 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10839 #define elf_backend_check_relocs ppc_elf_check_relocs
10840 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10841 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10842 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10843 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10844 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10845 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10846 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10847 #define elf_backend_fake_sections ppc_elf_fake_sections
10848 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10849 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10850 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10851 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10852 #define elf_backend_write_core_note ppc_elf_write_core_note
10853 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10854 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10855 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10856 #define elf_backend_write_section ppc_elf_write_section
10857 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10858 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10859 #define elf_backend_action_discarded ppc_elf_action_discarded
10860 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10861 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10862 #define elf_backend_section_processing ppc_elf_section_processing
10863
10864 #include "elf32-target.h"
10865
10866 /* FreeBSD Target */
10867
10868 #undef TARGET_LITTLE_SYM
10869 #undef TARGET_LITTLE_NAME
10870
10871 #undef TARGET_BIG_SYM
10872 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10873 #undef TARGET_BIG_NAME
10874 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10875
10876 #undef ELF_OSABI
10877 #define ELF_OSABI ELFOSABI_FREEBSD
10878
10879 #undef elf32_bed
10880 #define elf32_bed elf32_powerpc_fbsd_bed
10881
10882 #include "elf32-target.h"
10883
10884 /* VxWorks Target */
10885
10886 #undef TARGET_LITTLE_SYM
10887 #undef TARGET_LITTLE_NAME
10888
10889 #undef TARGET_BIG_SYM
10890 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10891 #undef TARGET_BIG_NAME
10892 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10893
10894 #undef ELF_OSABI
10895
10896 /* VxWorks uses the elf default section flags for .plt. */
10897 static const struct bfd_elf_special_section *
10898 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10899 {
10900 if (sec->name == NULL)
10901 return NULL;
10902
10903 if (strcmp (sec->name, ".plt") == 0)
10904 return _bfd_elf_get_sec_type_attr (abfd, sec);
10905
10906 return ppc_elf_get_sec_type_attr (abfd, sec);
10907 }
10908
10909 /* Like ppc_elf_link_hash_table_create, but overrides
10910 appropriately for VxWorks. */
10911 static struct bfd_link_hash_table *
10912 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10913 {
10914 struct bfd_link_hash_table *ret;
10915
10916 ret = ppc_elf_link_hash_table_create (abfd);
10917 if (ret)
10918 {
10919 struct ppc_elf_link_hash_table *htab
10920 = (struct ppc_elf_link_hash_table *)ret;
10921 htab->is_vxworks = 1;
10922 htab->plt_type = PLT_VXWORKS;
10923 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10924 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10925 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10926 }
10927 return ret;
10928 }
10929
10930 /* Tweak magic VxWorks symbols as they are loaded. */
10931 static bfd_boolean
10932 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10933 struct bfd_link_info *info,
10934 Elf_Internal_Sym *sym,
10935 const char **namep ATTRIBUTE_UNUSED,
10936 flagword *flagsp ATTRIBUTE_UNUSED,
10937 asection **secp,
10938 bfd_vma *valp)
10939 {
10940 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10941 valp))
10942 return FALSE;
10943
10944 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10945 }
10946
10947 static void
10948 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10949 {
10950 ppc_elf_final_write_processing(abfd, linker);
10951 elf_vxworks_final_write_processing(abfd, linker);
10952 }
10953
10954 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10955 define it. */
10956 #undef elf_backend_want_plt_sym
10957 #define elf_backend_want_plt_sym 1
10958 #undef elf_backend_want_got_plt
10959 #define elf_backend_want_got_plt 1
10960 #undef elf_backend_got_symbol_offset
10961 #define elf_backend_got_symbol_offset 0
10962 #undef elf_backend_plt_not_loaded
10963 #define elf_backend_plt_not_loaded 0
10964 #undef elf_backend_plt_readonly
10965 #define elf_backend_plt_readonly 1
10966 #undef elf_backend_got_header_size
10967 #define elf_backend_got_header_size 12
10968
10969 #undef bfd_elf32_get_synthetic_symtab
10970
10971 #undef bfd_elf32_bfd_link_hash_table_create
10972 #define bfd_elf32_bfd_link_hash_table_create \
10973 ppc_elf_vxworks_link_hash_table_create
10974 #undef elf_backend_add_symbol_hook
10975 #define elf_backend_add_symbol_hook \
10976 ppc_elf_vxworks_add_symbol_hook
10977 #undef elf_backend_link_output_symbol_hook
10978 #define elf_backend_link_output_symbol_hook \
10979 elf_vxworks_link_output_symbol_hook
10980 #undef elf_backend_final_write_processing
10981 #define elf_backend_final_write_processing \
10982 ppc_elf_vxworks_final_write_processing
10983 #undef elf_backend_get_sec_type_attr
10984 #define elf_backend_get_sec_type_attr \
10985 ppc_elf_vxworks_get_sec_type_attr
10986 #undef elf_backend_emit_relocs
10987 #define elf_backend_emit_relocs \
10988 elf_vxworks_emit_relocs
10989
10990 #undef elf32_bed
10991 #define elf32_bed ppc_elf_vxworks_bed
10992 #undef elf_backend_post_process_headers
10993
10994 #include "elf32-target.h"
GDB Binutils - Deliverables
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