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-Wstringop-truncation warnings
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2018 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE(htab, h) \
72 ((4*4 \
73 + (h != NULL \
74 && h == htab->tls_get_addr \
75 && !htab->params->no_tls_get_addr_opt ? 8*4 : 0) \
76 + (1u << htab->params->plt_stub_align) - 1) \
77 & -(1u << htab->params->plt_stub_align))
78
79 /* VxWorks uses its own plt layout, filled in by the static linker. */
80
81 /* The standard VxWorks PLT entry. */
82 #define VXWORKS_PLT_ENTRY_SIZE 32
83 static const bfd_vma ppc_elf_vxworks_plt_entry
84 [VXWORKS_PLT_ENTRY_SIZE / 4] =
85 {
86 0x3d800000, /* lis r12,0 */
87 0x818c0000, /* lwz r12,0(r12) */
88 0x7d8903a6, /* mtctr r12 */
89 0x4e800420, /* bctr */
90 0x39600000, /* li r11,0 */
91 0x48000000, /* b 14 <.PLT0resolve+0x4> */
92 0x60000000, /* nop */
93 0x60000000, /* nop */
94 };
95 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
96 [VXWORKS_PLT_ENTRY_SIZE / 4] =
97 {
98 0x3d9e0000, /* addis r12,r30,0 */
99 0x818c0000, /* lwz r12,0(r12) */
100 0x7d8903a6, /* mtctr r12 */
101 0x4e800420, /* bctr */
102 0x39600000, /* li r11,0 */
103 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
104 0x60000000, /* nop */
105 0x60000000, /* nop */
106 };
107
108 /* The initial VxWorks PLT entry. */
109 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
110 static const bfd_vma ppc_elf_vxworks_plt0_entry
111 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
112 {
113 0x3d800000, /* lis r12,0 */
114 0x398c0000, /* addi r12,r12,0 */
115 0x800c0008, /* lwz r0,8(r12) */
116 0x7c0903a6, /* mtctr r0 */
117 0x818c0004, /* lwz r12,4(r12) */
118 0x4e800420, /* bctr */
119 0x60000000, /* nop */
120 0x60000000, /* nop */
121 };
122 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
123 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
124 {
125 0x819e0008, /* lwz r12,8(r30) */
126 0x7d8903a6, /* mtctr r12 */
127 0x819e0004, /* lwz r12,4(r30) */
128 0x4e800420, /* bctr */
129 0x60000000, /* nop */
130 0x60000000, /* nop */
131 0x60000000, /* nop */
132 0x60000000, /* nop */
133 };
134
135 /* For executables, we have some additional relocations in
136 .rela.plt.unloaded, for the kernel loader. */
137
138 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
139 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
140 /* The number of relocations in the PLTResolve slot. */
141 #define VXWORKS_PLTRESOLVE_RELOCS 2
142 /* The number of relocations in the PLTResolve slot when creating
143 a shared library. */
144 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
145
146 /* Some instructions. */
147 #define ADDIS_11_11 0x3d6b0000
148 #define ADDIS_11_30 0x3d7e0000
149 #define ADDIS_12_12 0x3d8c0000
150 #define ADDI_11_11 0x396b0000
151 #define ADD_0_11_11 0x7c0b5a14
152 #define ADD_3_12_2 0x7c6c1214
153 #define ADD_11_0_11 0x7d605a14
154 #define B 0x48000000
155 #define BA 0x48000002
156 #define BCL_20_31 0x429f0005
157 #define BCTR 0x4e800420
158 #define BEQLR 0x4d820020
159 #define CMPWI_11_0 0x2c0b0000
160 #define LIS_11 0x3d600000
161 #define LIS_12 0x3d800000
162 #define LWZU_0_12 0x840c0000
163 #define LWZ_0_12 0x800c0000
164 #define LWZ_11_3 0x81630000
165 #define LWZ_11_11 0x816b0000
166 #define LWZ_11_30 0x817e0000
167 #define LWZ_12_3 0x81830000
168 #define LWZ_12_12 0x818c0000
169 #define MR_0_3 0x7c601b78
170 #define MR_3_0 0x7c030378
171 #define MFLR_0 0x7c0802a6
172 #define MFLR_12 0x7d8802a6
173 #define MTCTR_0 0x7c0903a6
174 #define MTCTR_11 0x7d6903a6
175 #define MTLR_0 0x7c0803a6
176 #define NOP 0x60000000
177 #define SUB_11_11_12 0x7d6c5850
178
179 /* Offset of tp and dtp pointers from start of TLS block. */
180 #define TP_OFFSET 0x7000
181 #define DTP_OFFSET 0x8000
182
183 /* The value of a defined global symbol. */
184 #define SYM_VAL(SYM) \
185 ((SYM)->root.u.def.section->output_section->vma \
186 + (SYM)->root.u.def.section->output_offset \
187 + (SYM)->root.u.def.value)
188 \f
189 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
190
191 static reloc_howto_type ppc_elf_howto_raw[] = {
192 /* This reloc does nothing. */
193 HOWTO (R_PPC_NONE, /* type */
194 0, /* rightshift */
195 3, /* size (0 = byte, 1 = short, 2 = long) */
196 0, /* bitsize */
197 FALSE, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_dont, /* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_PPC_NONE", /* name */
202 FALSE, /* partial_inplace */
203 0, /* src_mask */
204 0, /* dst_mask */
205 FALSE), /* pcrel_offset */
206
207 /* A standard 32 bit relocation. */
208 HOWTO (R_PPC_ADDR32, /* type */
209 0, /* rightshift */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
211 32, /* bitsize */
212 FALSE, /* pc_relative */
213 0, /* bitpos */
214 complain_overflow_dont, /* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_PPC_ADDR32", /* name */
217 FALSE, /* partial_inplace */
218 0, /* src_mask */
219 0xffffffff, /* dst_mask */
220 FALSE), /* pcrel_offset */
221
222 /* An absolute 26 bit branch; the lower two bits must be zero.
223 FIXME: we don't check that, we just clear them. */
224 HOWTO (R_PPC_ADDR24, /* type */
225 0, /* rightshift */
226 2, /* size (0 = byte, 1 = short, 2 = long) */
227 26, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_signed, /* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR24", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0x3fffffc, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* A standard 16 bit relocation. */
239 HOWTO (R_PPC_ADDR16, /* type */
240 0, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_bitfield, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* A 16 bit relocation without overflow. */
254 HOWTO (R_PPC_ADDR16_LO, /* type */
255 0, /* rightshift */
256 1, /* size (0 = byte, 1 = short, 2 = long) */
257 16, /* bitsize */
258 FALSE, /* pc_relative */
259 0, /* bitpos */
260 complain_overflow_dont,/* complain_on_overflow */
261 bfd_elf_generic_reloc, /* special_function */
262 "R_PPC_ADDR16_LO", /* name */
263 FALSE, /* partial_inplace */
264 0, /* src_mask */
265 0xffff, /* dst_mask */
266 FALSE), /* pcrel_offset */
267
268 /* The high order 16 bits of an address. */
269 HOWTO (R_PPC_ADDR16_HI, /* type */
270 16, /* rightshift */
271 1, /* size (0 = byte, 1 = short, 2 = long) */
272 16, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC_ADDR16_HI", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0xffff, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* The high order 16 bits of an address, plus 1 if the contents of
284 the low 16 bits, treated as a signed number, is negative. */
285 HOWTO (R_PPC_ADDR16_HA, /* type */
286 16, /* rightshift */
287 1, /* size (0 = byte, 1 = short, 2 = long) */
288 16, /* bitsize */
289 FALSE, /* pc_relative */
290 0, /* bitpos */
291 complain_overflow_dont, /* complain_on_overflow */
292 ppc_elf_addr16_ha_reloc, /* special_function */
293 "R_PPC_ADDR16_HA", /* name */
294 FALSE, /* partial_inplace */
295 0, /* src_mask */
296 0xffff, /* dst_mask */
297 FALSE), /* pcrel_offset */
298
299 /* An absolute 16 bit branch; the lower two bits must be zero.
300 FIXME: we don't check that, we just clear them. */
301 HOWTO (R_PPC_ADDR14, /* type */
302 0, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 0, /* bitpos */
307 complain_overflow_signed, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_PPC_ADDR14", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0xfffc, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* An absolute 16 bit branch, for which bit 10 should be set to
316 indicate that the branch is expected to be taken. The lower two
317 bits must be zero. */
318 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
319 0, /* rightshift */
320 2, /* size (0 = byte, 1 = short, 2 = long) */
321 16, /* bitsize */
322 FALSE, /* pc_relative */
323 0, /* bitpos */
324 complain_overflow_signed, /* complain_on_overflow */
325 bfd_elf_generic_reloc, /* special_function */
326 "R_PPC_ADDR14_BRTAKEN",/* name */
327 FALSE, /* partial_inplace */
328 0, /* src_mask */
329 0xfffc, /* dst_mask */
330 FALSE), /* pcrel_offset */
331
332 /* An absolute 16 bit branch, for which bit 10 should be set to
333 indicate that the branch is not expected to be taken. The lower
334 two bits must be zero. */
335 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_ADDR14_BRNTAKEN",/* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* A relative 26 bit branch; the lower two bits must be zero. */
350 HOWTO (R_PPC_REL24, /* type */
351 0, /* rightshift */
352 2, /* size (0 = byte, 1 = short, 2 = long) */
353 26, /* bitsize */
354 TRUE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC_REL24", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0x3fffffc, /* dst_mask */
362 TRUE), /* pcrel_offset */
363
364 /* A relative 16 bit branch; the lower two bits must be zero. */
365 HOWTO (R_PPC_REL14, /* type */
366 0, /* rightshift */
367 2, /* size (0 = byte, 1 = short, 2 = long) */
368 16, /* bitsize */
369 TRUE, /* pc_relative */
370 0, /* bitpos */
371 complain_overflow_signed, /* complain_on_overflow */
372 bfd_elf_generic_reloc, /* special_function */
373 "R_PPC_REL14", /* name */
374 FALSE, /* partial_inplace */
375 0, /* src_mask */
376 0xfffc, /* dst_mask */
377 TRUE), /* pcrel_offset */
378
379 /* A relative 16 bit branch. Bit 10 should be set to indicate that
380 the branch is expected to be taken. The lower two bits must be
381 zero. */
382 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 TRUE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_PPC_REL14_BRTAKEN", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0xfffc, /* dst_mask */
394 TRUE), /* pcrel_offset */
395
396 /* A relative 16 bit branch. Bit 10 should be set to indicate that
397 the branch is not expected to be taken. The lower two bits must
398 be zero. */
399 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 TRUE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 bfd_elf_generic_reloc, /* special_function */
407 "R_PPC_REL14_BRNTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0xfffc, /* dst_mask */
411 TRUE), /* pcrel_offset */
412
413 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
414 symbol. */
415 HOWTO (R_PPC_GOT16, /* type */
416 0, /* rightshift */
417 1, /* size (0 = byte, 1 = short, 2 = long) */
418 16, /* bitsize */
419 FALSE, /* pc_relative */
420 0, /* bitpos */
421 complain_overflow_signed, /* complain_on_overflow */
422 ppc_elf_unhandled_reloc, /* special_function */
423 "R_PPC_GOT16", /* name */
424 FALSE, /* partial_inplace */
425 0, /* src_mask */
426 0xffff, /* dst_mask */
427 FALSE), /* pcrel_offset */
428
429 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
430 the symbol. */
431 HOWTO (R_PPC_GOT16_LO, /* type */
432 0, /* rightshift */
433 1, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 FALSE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_dont, /* complain_on_overflow */
438 ppc_elf_unhandled_reloc, /* special_function */
439 "R_PPC_GOT16_LO", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0xffff, /* dst_mask */
443 FALSE), /* pcrel_offset */
444
445 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
446 the symbol. */
447 HOWTO (R_PPC_GOT16_HI, /* type */
448 16, /* rightshift */
449 1, /* size (0 = byte, 1 = short, 2 = long) */
450 16, /* bitsize */
451 FALSE, /* pc_relative */
452 0, /* bitpos */
453 complain_overflow_dont, /* complain_on_overflow */
454 ppc_elf_unhandled_reloc, /* special_function */
455 "R_PPC_GOT16_HI", /* name */
456 FALSE, /* partial_inplace */
457 0, /* src_mask */
458 0xffff, /* dst_mask */
459 FALSE), /* pcrel_offset */
460
461 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
462 the symbol. */
463 HOWTO (R_PPC_GOT16_HA, /* type */
464 16, /* rightshift */
465 1, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 FALSE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_dont, /* complain_on_overflow */
470 ppc_elf_unhandled_reloc, /* special_function */
471 "R_PPC_GOT16_HA", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0xffff, /* dst_mask */
475 FALSE), /* pcrel_offset */
476
477 /* Like R_PPC_REL24, but referring to the procedure linkage table
478 entry for the symbol. */
479 HOWTO (R_PPC_PLTREL24, /* type */
480 0, /* rightshift */
481 2, /* size (0 = byte, 1 = short, 2 = long) */
482 26, /* bitsize */
483 TRUE, /* pc_relative */
484 0, /* bitpos */
485 complain_overflow_signed, /* complain_on_overflow */
486 ppc_elf_unhandled_reloc, /* special_function */
487 "R_PPC_PLTREL24", /* name */
488 FALSE, /* partial_inplace */
489 0, /* src_mask */
490 0x3fffffc, /* dst_mask */
491 TRUE), /* pcrel_offset */
492
493 /* This is used only by the dynamic linker. The symbol should exist
494 both in the object being run and in some shared library. The
495 dynamic linker copies the data addressed by the symbol from the
496 shared library into the object, because the object being
497 run has to have the data at some particular address. */
498 HOWTO (R_PPC_COPY, /* type */
499 0, /* rightshift */
500 2, /* size (0 = byte, 1 = short, 2 = long) */
501 32, /* bitsize */
502 FALSE, /* pc_relative */
503 0, /* bitpos */
504 complain_overflow_dont, /* complain_on_overflow */
505 ppc_elf_unhandled_reloc, /* special_function */
506 "R_PPC_COPY", /* name */
507 FALSE, /* partial_inplace */
508 0, /* src_mask */
509 0, /* dst_mask */
510 FALSE), /* pcrel_offset */
511
512 /* Like R_PPC_ADDR32, but used when setting global offset table
513 entries. */
514 HOWTO (R_PPC_GLOB_DAT, /* type */
515 0, /* rightshift */
516 2, /* size (0 = byte, 1 = short, 2 = long) */
517 32, /* bitsize */
518 FALSE, /* pc_relative */
519 0, /* bitpos */
520 complain_overflow_dont, /* complain_on_overflow */
521 ppc_elf_unhandled_reloc, /* special_function */
522 "R_PPC_GLOB_DAT", /* name */
523 FALSE, /* partial_inplace */
524 0, /* src_mask */
525 0xffffffff, /* dst_mask */
526 FALSE), /* pcrel_offset */
527
528 /* Marks a procedure linkage table entry for a symbol. */
529 HOWTO (R_PPC_JMP_SLOT, /* type */
530 0, /* rightshift */
531 2, /* size (0 = byte, 1 = short, 2 = long) */
532 32, /* bitsize */
533 FALSE, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_dont, /* complain_on_overflow */
536 ppc_elf_unhandled_reloc, /* special_function */
537 "R_PPC_JMP_SLOT", /* name */
538 FALSE, /* partial_inplace */
539 0, /* src_mask */
540 0, /* dst_mask */
541 FALSE), /* pcrel_offset */
542
543 /* Used only by the dynamic linker. When the object is run, this
544 longword is set to the load address of the object, plus the
545 addend. */
546 HOWTO (R_PPC_RELATIVE, /* type */
547 0, /* rightshift */
548 2, /* size (0 = byte, 1 = short, 2 = long) */
549 32, /* bitsize */
550 FALSE, /* pc_relative */
551 0, /* bitpos */
552 complain_overflow_dont, /* complain_on_overflow */
553 bfd_elf_generic_reloc, /* special_function */
554 "R_PPC_RELATIVE", /* name */
555 FALSE, /* partial_inplace */
556 0, /* src_mask */
557 0xffffffff, /* dst_mask */
558 FALSE), /* pcrel_offset */
559
560 /* Like R_PPC_REL24, but uses the value of the symbol within the
561 object rather than the final value. Normally used for
562 _GLOBAL_OFFSET_TABLE_. */
563 HOWTO (R_PPC_LOCAL24PC, /* type */
564 0, /* rightshift */
565 2, /* size (0 = byte, 1 = short, 2 = long) */
566 26, /* bitsize */
567 TRUE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_signed, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_LOCAL24PC", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0x3fffffc, /* dst_mask */
575 TRUE), /* pcrel_offset */
576
577 /* Like R_PPC_ADDR32, but may be unaligned. */
578 HOWTO (R_PPC_UADDR32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 FALSE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_dont, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_UADDR32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 FALSE), /* pcrel_offset */
591
592 /* Like R_PPC_ADDR16, but may be unaligned. */
593 HOWTO (R_PPC_UADDR16, /* type */
594 0, /* rightshift */
595 1, /* size (0 = byte, 1 = short, 2 = long) */
596 16, /* bitsize */
597 FALSE, /* pc_relative */
598 0, /* bitpos */
599 complain_overflow_bitfield, /* complain_on_overflow */
600 bfd_elf_generic_reloc, /* special_function */
601 "R_PPC_UADDR16", /* name */
602 FALSE, /* partial_inplace */
603 0, /* src_mask */
604 0xffff, /* dst_mask */
605 FALSE), /* pcrel_offset */
606
607 /* 32-bit PC relative */
608 HOWTO (R_PPC_REL32, /* type */
609 0, /* rightshift */
610 2, /* size (0 = byte, 1 = short, 2 = long) */
611 32, /* bitsize */
612 TRUE, /* pc_relative */
613 0, /* bitpos */
614 complain_overflow_dont, /* complain_on_overflow */
615 bfd_elf_generic_reloc, /* special_function */
616 "R_PPC_REL32", /* name */
617 FALSE, /* partial_inplace */
618 0, /* src_mask */
619 0xffffffff, /* dst_mask */
620 TRUE), /* pcrel_offset */
621
622 /* 32-bit relocation to the symbol's procedure linkage table.
623 FIXME: not supported. */
624 HOWTO (R_PPC_PLT32, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_dont, /* complain_on_overflow */
631 ppc_elf_unhandled_reloc, /* special_function */
632 "R_PPC_PLT32", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
639 FIXME: not supported. */
640 HOWTO (R_PPC_PLTREL32, /* type */
641 0, /* rightshift */
642 2, /* size (0 = byte, 1 = short, 2 = long) */
643 32, /* bitsize */
644 TRUE, /* pc_relative */
645 0, /* bitpos */
646 complain_overflow_dont, /* complain_on_overflow */
647 ppc_elf_unhandled_reloc, /* special_function */
648 "R_PPC_PLTREL32", /* name */
649 FALSE, /* partial_inplace */
650 0, /* src_mask */
651 0, /* dst_mask */
652 TRUE), /* pcrel_offset */
653
654 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
655 the symbol. */
656 HOWTO (R_PPC_PLT16_LO, /* type */
657 0, /* rightshift */
658 1, /* size (0 = byte, 1 = short, 2 = long) */
659 16, /* bitsize */
660 FALSE, /* pc_relative */
661 0, /* bitpos */
662 complain_overflow_dont, /* complain_on_overflow */
663 ppc_elf_unhandled_reloc, /* special_function */
664 "R_PPC_PLT16_LO", /* name */
665 FALSE, /* partial_inplace */
666 0, /* src_mask */
667 0xffff, /* dst_mask */
668 FALSE), /* pcrel_offset */
669
670 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
671 the symbol. */
672 HOWTO (R_PPC_PLT16_HI, /* type */
673 16, /* rightshift */
674 1, /* size (0 = byte, 1 = short, 2 = long) */
675 16, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_dont, /* complain_on_overflow */
679 ppc_elf_unhandled_reloc, /* special_function */
680 "R_PPC_PLT16_HI", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
687 the symbol. */
688 HOWTO (R_PPC_PLT16_HA, /* type */
689 16, /* rightshift */
690 1, /* size (0 = byte, 1 = short, 2 = long) */
691 16, /* bitsize */
692 FALSE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_dont, /* complain_on_overflow */
695 ppc_elf_unhandled_reloc, /* special_function */
696 "R_PPC_PLT16_HA", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffff, /* dst_mask */
700 FALSE), /* pcrel_offset */
701
702 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
703 small data items. */
704 HOWTO (R_PPC_SDAREL16, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_signed, /* complain_on_overflow */
711 ppc_elf_unhandled_reloc, /* special_function */
712 "R_PPC_SDAREL16", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit section relative relocation. */
719 HOWTO (R_PPC_SECTOFF, /* type */
720 0, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_signed, /* complain_on_overflow */
726 ppc_elf_unhandled_reloc, /* special_function */
727 "R_PPC_SECTOFF", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit lower half section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_LO, /* type */
735 0, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_dont, /* complain_on_overflow */
741 ppc_elf_unhandled_reloc, /* special_function */
742 "R_PPC_SECTOFF_LO", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* 16-bit upper half section relative relocation. */
749 HOWTO (R_PPC_SECTOFF_HI, /* type */
750 16, /* rightshift */
751 1, /* size (0 = byte, 1 = short, 2 = long) */
752 16, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 ppc_elf_unhandled_reloc, /* special_function */
757 "R_PPC_SECTOFF_HI", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0xffff, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* 16-bit upper half adjusted section relative relocation. */
764 HOWTO (R_PPC_SECTOFF_HA, /* type */
765 16, /* rightshift */
766 1, /* size (0 = byte, 1 = short, 2 = long) */
767 16, /* bitsize */
768 FALSE, /* pc_relative */
769 0, /* bitpos */
770 complain_overflow_dont, /* complain_on_overflow */
771 ppc_elf_unhandled_reloc, /* special_function */
772 "R_PPC_SECTOFF_HA", /* name */
773 FALSE, /* partial_inplace */
774 0, /* src_mask */
775 0xffff, /* dst_mask */
776 FALSE), /* pcrel_offset */
777
778 /* Marker relocs for TLS. */
779 HOWTO (R_PPC_TLS,
780 0, /* rightshift */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
782 32, /* bitsize */
783 FALSE, /* pc_relative */
784 0, /* bitpos */
785 complain_overflow_dont, /* complain_on_overflow */
786 bfd_elf_generic_reloc, /* special_function */
787 "R_PPC_TLS", /* name */
788 FALSE, /* partial_inplace */
789 0, /* src_mask */
790 0, /* dst_mask */
791 FALSE), /* pcrel_offset */
792
793 HOWTO (R_PPC_TLSGD,
794 0, /* rightshift */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
796 32, /* bitsize */
797 FALSE, /* pc_relative */
798 0, /* bitpos */
799 complain_overflow_dont, /* complain_on_overflow */
800 bfd_elf_generic_reloc, /* special_function */
801 "R_PPC_TLSGD", /* name */
802 FALSE, /* partial_inplace */
803 0, /* src_mask */
804 0, /* dst_mask */
805 FALSE), /* pcrel_offset */
806
807 HOWTO (R_PPC_TLSLD,
808 0, /* rightshift */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
810 32, /* bitsize */
811 FALSE, /* pc_relative */
812 0, /* bitpos */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 "R_PPC_TLSLD", /* name */
816 FALSE, /* partial_inplace */
817 0, /* src_mask */
818 0, /* dst_mask */
819 FALSE), /* pcrel_offset */
820
821 /* Marker relocs on inline plt call instructions. */
822 HOWTO (R_PPC_PLTSEQ,
823 0, /* rightshift */
824 2, /* size (0 = byte, 1 = short, 2 = long) */
825 32, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 bfd_elf_generic_reloc, /* special_function */
830 "R_PPC_PLTSEQ", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 HOWTO (R_PPC_PLTCALL,
837 0, /* rightshift */
838 2, /* size (0 = byte, 1 = short, 2 = long) */
839 32, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 bfd_elf_generic_reloc, /* special_function */
844 "R_PPC_PLTCALL", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Computes the load module index of the load module that contains the
851 definition of its TLS sym. */
852 HOWTO (R_PPC_DTPMOD32,
853 0, /* rightshift */
854 2, /* size (0 = byte, 1 = short, 2 = long) */
855 32, /* bitsize */
856 FALSE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 ppc_elf_unhandled_reloc, /* special_function */
860 "R_PPC_DTPMOD32", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 0xffffffff, /* dst_mask */
864 FALSE), /* pcrel_offset */
865
866 /* Computes a dtv-relative displacement, the difference between the value
867 of sym+add and the base address of the thread-local storage block that
868 contains the definition of sym, minus 0x8000. */
869 HOWTO (R_PPC_DTPREL32,
870 0, /* rightshift */
871 2, /* size (0 = byte, 1 = short, 2 = long) */
872 32, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 ppc_elf_unhandled_reloc, /* special_function */
877 "R_PPC_DTPREL32", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 0xffffffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* A 16 bit dtprel reloc. */
884 HOWTO (R_PPC_DTPREL16,
885 0, /* rightshift */
886 1, /* size (0 = byte, 1 = short, 2 = long) */
887 16, /* bitsize */
888 FALSE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_signed, /* complain_on_overflow */
891 ppc_elf_unhandled_reloc, /* special_function */
892 "R_PPC_DTPREL16", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 0xffff, /* dst_mask */
896 FALSE), /* pcrel_offset */
897
898 /* Like DTPREL16, but no overflow. */
899 HOWTO (R_PPC_DTPREL16_LO,
900 0, /* rightshift */
901 1, /* size (0 = byte, 1 = short, 2 = long) */
902 16, /* bitsize */
903 FALSE, /* pc_relative */
904 0, /* bitpos */
905 complain_overflow_dont, /* complain_on_overflow */
906 ppc_elf_unhandled_reloc, /* special_function */
907 "R_PPC_DTPREL16_LO", /* name */
908 FALSE, /* partial_inplace */
909 0, /* src_mask */
910 0xffff, /* dst_mask */
911 FALSE), /* pcrel_offset */
912
913 /* Like DTPREL16_LO, but next higher group of 16 bits. */
914 HOWTO (R_PPC_DTPREL16_HI,
915 16, /* rightshift */
916 1, /* size (0 = byte, 1 = short, 2 = long) */
917 16, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_dont, /* complain_on_overflow */
921 ppc_elf_unhandled_reloc, /* special_function */
922 "R_PPC_DTPREL16_HI", /* name */
923 FALSE, /* partial_inplace */
924 0, /* src_mask */
925 0xffff, /* dst_mask */
926 FALSE), /* pcrel_offset */
927
928 /* Like DTPREL16_HI, but adjust for low 16 bits. */
929 HOWTO (R_PPC_DTPREL16_HA,
930 16, /* rightshift */
931 1, /* size (0 = byte, 1 = short, 2 = long) */
932 16, /* bitsize */
933 FALSE, /* pc_relative */
934 0, /* bitpos */
935 complain_overflow_dont, /* complain_on_overflow */
936 ppc_elf_unhandled_reloc, /* special_function */
937 "R_PPC_DTPREL16_HA", /* name */
938 FALSE, /* partial_inplace */
939 0, /* src_mask */
940 0xffff, /* dst_mask */
941 FALSE), /* pcrel_offset */
942
943 /* Computes a tp-relative displacement, the difference between the value of
944 sym+add and the value of the thread pointer (r13). */
945 HOWTO (R_PPC_TPREL32,
946 0, /* rightshift */
947 2, /* size (0 = byte, 1 = short, 2 = long) */
948 32, /* bitsize */
949 FALSE, /* pc_relative */
950 0, /* bitpos */
951 complain_overflow_dont, /* complain_on_overflow */
952 ppc_elf_unhandled_reloc, /* special_function */
953 "R_PPC_TPREL32", /* name */
954 FALSE, /* partial_inplace */
955 0, /* src_mask */
956 0xffffffff, /* dst_mask */
957 FALSE), /* pcrel_offset */
958
959 /* A 16 bit tprel reloc. */
960 HOWTO (R_PPC_TPREL16,
961 0, /* rightshift */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
963 16, /* bitsize */
964 FALSE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_signed, /* complain_on_overflow */
967 ppc_elf_unhandled_reloc, /* special_function */
968 "R_PPC_TPREL16", /* name */
969 FALSE, /* partial_inplace */
970 0, /* src_mask */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
973
974 /* Like TPREL16, but no overflow. */
975 HOWTO (R_PPC_TPREL16_LO,
976 0, /* rightshift */
977 1, /* size (0 = byte, 1 = short, 2 = long) */
978 16, /* bitsize */
979 FALSE, /* pc_relative */
980 0, /* bitpos */
981 complain_overflow_dont, /* complain_on_overflow */
982 ppc_elf_unhandled_reloc, /* special_function */
983 "R_PPC_TPREL16_LO", /* name */
984 FALSE, /* partial_inplace */
985 0, /* src_mask */
986 0xffff, /* dst_mask */
987 FALSE), /* pcrel_offset */
988
989 /* Like TPREL16_LO, but next higher group of 16 bits. */
990 HOWTO (R_PPC_TPREL16_HI,
991 16, /* rightshift */
992 1, /* size (0 = byte, 1 = short, 2 = long) */
993 16, /* bitsize */
994 FALSE, /* pc_relative */
995 0, /* bitpos */
996 complain_overflow_dont, /* complain_on_overflow */
997 ppc_elf_unhandled_reloc, /* special_function */
998 "R_PPC_TPREL16_HI", /* name */
999 FALSE, /* partial_inplace */
1000 0, /* src_mask */
1001 0xffff, /* dst_mask */
1002 FALSE), /* pcrel_offset */
1003
1004 /* Like TPREL16_HI, but adjust for low 16 bits. */
1005 HOWTO (R_PPC_TPREL16_HA,
1006 16, /* rightshift */
1007 1, /* size (0 = byte, 1 = short, 2 = long) */
1008 16, /* bitsize */
1009 FALSE, /* pc_relative */
1010 0, /* bitpos */
1011 complain_overflow_dont, /* complain_on_overflow */
1012 ppc_elf_unhandled_reloc, /* special_function */
1013 "R_PPC_TPREL16_HA", /* name */
1014 FALSE, /* partial_inplace */
1015 0, /* src_mask */
1016 0xffff, /* dst_mask */
1017 FALSE), /* pcrel_offset */
1018
1019 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1020 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1021 to the first entry. */
1022 HOWTO (R_PPC_GOT_TLSGD16,
1023 0, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc_elf_unhandled_reloc, /* special_function */
1030 "R_PPC_GOT_TLSGD16", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* Like GOT_TLSGD16, but no overflow. */
1037 HOWTO (R_PPC_GOT_TLSGD16_LO,
1038 0, /* rightshift */
1039 1, /* size (0 = byte, 1 = short, 2 = long) */
1040 16, /* bitsize */
1041 FALSE, /* pc_relative */
1042 0, /* bitpos */
1043 complain_overflow_dont, /* complain_on_overflow */
1044 ppc_elf_unhandled_reloc, /* special_function */
1045 "R_PPC_GOT_TLSGD16_LO", /* name */
1046 FALSE, /* partial_inplace */
1047 0, /* src_mask */
1048 0xffff, /* dst_mask */
1049 FALSE), /* pcrel_offset */
1050
1051 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1052 HOWTO (R_PPC_GOT_TLSGD16_HI,
1053 16, /* rightshift */
1054 1, /* size (0 = byte, 1 = short, 2 = long) */
1055 16, /* bitsize */
1056 FALSE, /* pc_relative */
1057 0, /* bitpos */
1058 complain_overflow_dont, /* complain_on_overflow */
1059 ppc_elf_unhandled_reloc, /* special_function */
1060 "R_PPC_GOT_TLSGD16_HI", /* name */
1061 FALSE, /* partial_inplace */
1062 0, /* src_mask */
1063 0xffff, /* dst_mask */
1064 FALSE), /* pcrel_offset */
1065
1066 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1067 HOWTO (R_PPC_GOT_TLSGD16_HA,
1068 16, /* rightshift */
1069 1, /* size (0 = byte, 1 = short, 2 = long) */
1070 16, /* bitsize */
1071 FALSE, /* pc_relative */
1072 0, /* bitpos */
1073 complain_overflow_dont, /* complain_on_overflow */
1074 ppc_elf_unhandled_reloc, /* special_function */
1075 "R_PPC_GOT_TLSGD16_HA", /* name */
1076 FALSE, /* partial_inplace */
1077 0, /* src_mask */
1078 0xffff, /* dst_mask */
1079 FALSE), /* pcrel_offset */
1080
1081 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1082 with values (sym+add)@dtpmod and zero, and computes the offset to the
1083 first entry. */
1084 HOWTO (R_PPC_GOT_TLSLD16,
1085 0, /* rightshift */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1087 16, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_signed, /* complain_on_overflow */
1091 ppc_elf_unhandled_reloc, /* special_function */
1092 "R_PPC_GOT_TLSLD16", /* name */
1093 FALSE, /* partial_inplace */
1094 0, /* src_mask */
1095 0xffff, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 /* Like GOT_TLSLD16, but no overflow. */
1099 HOWTO (R_PPC_GOT_TLSLD16_LO,
1100 0, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 16, /* bitsize */
1103 FALSE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_dont, /* complain_on_overflow */
1106 ppc_elf_unhandled_reloc, /* special_function */
1107 "R_PPC_GOT_TLSLD16_LO", /* name */
1108 FALSE, /* partial_inplace */
1109 0, /* src_mask */
1110 0xffff, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1112
1113 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1114 HOWTO (R_PPC_GOT_TLSLD16_HI,
1115 16, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_dont, /* complain_on_overflow */
1121 ppc_elf_unhandled_reloc, /* special_function */
1122 "R_PPC_GOT_TLSLD16_HI", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xffff, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1129 HOWTO (R_PPC_GOT_TLSLD16_HA,
1130 16, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc_elf_unhandled_reloc, /* special_function */
1137 "R_PPC_GOT_TLSLD16_HA", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xffff, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1144 the offset to the entry. */
1145 HOWTO (R_PPC_GOT_DTPREL16,
1146 0, /* rightshift */
1147 1, /* size (0 = byte, 1 = short, 2 = long) */
1148 16, /* bitsize */
1149 FALSE, /* pc_relative */
1150 0, /* bitpos */
1151 complain_overflow_signed, /* complain_on_overflow */
1152 ppc_elf_unhandled_reloc, /* special_function */
1153 "R_PPC_GOT_DTPREL16", /* name */
1154 FALSE, /* partial_inplace */
1155 0, /* src_mask */
1156 0xffff, /* dst_mask */
1157 FALSE), /* pcrel_offset */
1158
1159 /* Like GOT_DTPREL16, but no overflow. */
1160 HOWTO (R_PPC_GOT_DTPREL16_LO,
1161 0, /* rightshift */
1162 1, /* size (0 = byte, 1 = short, 2 = long) */
1163 16, /* bitsize */
1164 FALSE, /* pc_relative */
1165 0, /* bitpos */
1166 complain_overflow_dont, /* complain_on_overflow */
1167 ppc_elf_unhandled_reloc, /* special_function */
1168 "R_PPC_GOT_DTPREL16_LO", /* name */
1169 FALSE, /* partial_inplace */
1170 0, /* src_mask */
1171 0xffff, /* dst_mask */
1172 FALSE), /* pcrel_offset */
1173
1174 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1175 HOWTO (R_PPC_GOT_DTPREL16_HI,
1176 16, /* rightshift */
1177 1, /* size (0 = byte, 1 = short, 2 = long) */
1178 16, /* bitsize */
1179 FALSE, /* pc_relative */
1180 0, /* bitpos */
1181 complain_overflow_dont, /* complain_on_overflow */
1182 ppc_elf_unhandled_reloc, /* special_function */
1183 "R_PPC_GOT_DTPREL16_HI", /* name */
1184 FALSE, /* partial_inplace */
1185 0, /* src_mask */
1186 0xffff, /* dst_mask */
1187 FALSE), /* pcrel_offset */
1188
1189 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1190 HOWTO (R_PPC_GOT_DTPREL16_HA,
1191 16, /* rightshift */
1192 1, /* size (0 = byte, 1 = short, 2 = long) */
1193 16, /* bitsize */
1194 FALSE, /* pc_relative */
1195 0, /* bitpos */
1196 complain_overflow_dont, /* complain_on_overflow */
1197 ppc_elf_unhandled_reloc, /* special_function */
1198 "R_PPC_GOT_DTPREL16_HA", /* name */
1199 FALSE, /* partial_inplace */
1200 0, /* src_mask */
1201 0xffff, /* dst_mask */
1202 FALSE), /* pcrel_offset */
1203
1204 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1205 offset to the entry. */
1206 HOWTO (R_PPC_GOT_TPREL16,
1207 0, /* rightshift */
1208 1, /* size (0 = byte, 1 = short, 2 = long) */
1209 16, /* bitsize */
1210 FALSE, /* pc_relative */
1211 0, /* bitpos */
1212 complain_overflow_signed, /* complain_on_overflow */
1213 ppc_elf_unhandled_reloc, /* special_function */
1214 "R_PPC_GOT_TPREL16", /* name */
1215 FALSE, /* partial_inplace */
1216 0, /* src_mask */
1217 0xffff, /* dst_mask */
1218 FALSE), /* pcrel_offset */
1219
1220 /* Like GOT_TPREL16, but no overflow. */
1221 HOWTO (R_PPC_GOT_TPREL16_LO,
1222 0, /* rightshift */
1223 1, /* size (0 = byte, 1 = short, 2 = long) */
1224 16, /* bitsize */
1225 FALSE, /* pc_relative */
1226 0, /* bitpos */
1227 complain_overflow_dont, /* complain_on_overflow */
1228 ppc_elf_unhandled_reloc, /* special_function */
1229 "R_PPC_GOT_TPREL16_LO", /* name */
1230 FALSE, /* partial_inplace */
1231 0, /* src_mask */
1232 0xffff, /* dst_mask */
1233 FALSE), /* pcrel_offset */
1234
1235 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1236 HOWTO (R_PPC_GOT_TPREL16_HI,
1237 16, /* rightshift */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1239 16, /* bitsize */
1240 FALSE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_dont, /* complain_on_overflow */
1243 ppc_elf_unhandled_reloc, /* special_function */
1244 "R_PPC_GOT_TPREL16_HI", /* name */
1245 FALSE, /* partial_inplace */
1246 0, /* src_mask */
1247 0xffff, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1249
1250 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1251 HOWTO (R_PPC_GOT_TPREL16_HA,
1252 16, /* rightshift */
1253 1, /* size (0 = byte, 1 = short, 2 = long) */
1254 16, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 ppc_elf_unhandled_reloc, /* special_function */
1259 "R_PPC_GOT_TPREL16_HA", /* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0xffff, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 /* The remaining relocs are from the Embedded ELF ABI, and are not
1266 in the SVR4 ELF ABI. */
1267
1268 /* 32 bit value resulting from the addend minus the symbol. */
1269 HOWTO (R_PPC_EMB_NADDR32, /* type */
1270 0, /* rightshift */
1271 2, /* size (0 = byte, 1 = short, 2 = long) */
1272 32, /* bitsize */
1273 FALSE, /* pc_relative */
1274 0, /* bitpos */
1275 complain_overflow_dont, /* complain_on_overflow */
1276 ppc_elf_unhandled_reloc, /* special_function */
1277 "R_PPC_EMB_NADDR32", /* name */
1278 FALSE, /* partial_inplace */
1279 0, /* src_mask */
1280 0xffffffff, /* dst_mask */
1281 FALSE), /* pcrel_offset */
1282
1283 /* 16 bit value resulting from the addend minus the symbol. */
1284 HOWTO (R_PPC_EMB_NADDR16, /* type */
1285 0, /* rightshift */
1286 1, /* size (0 = byte, 1 = short, 2 = long) */
1287 16, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_signed, /* complain_on_overflow */
1291 ppc_elf_unhandled_reloc, /* special_function */
1292 "R_PPC_EMB_NADDR16", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 0xffff, /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* 16 bit value resulting from the addend minus the symbol. */
1299 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1300 0, /* rightshift */
1301 1, /* size (0 = byte, 1 = short, 2 = long) */
1302 16, /* bitsize */
1303 FALSE, /* pc_relative */
1304 0, /* bitpos */
1305 complain_overflow_dont,/* complain_on_overflow */
1306 ppc_elf_unhandled_reloc, /* special_function */
1307 "R_PPC_EMB_ADDR16_LO", /* name */
1308 FALSE, /* partial_inplace */
1309 0, /* src_mask */
1310 0xffff, /* dst_mask */
1311 FALSE), /* pcrel_offset */
1312
1313 /* The high order 16 bits of the addend minus the symbol. */
1314 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1315 16, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_dont, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_NADDR16_HI", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* The high order 16 bits of the result of the addend minus the address,
1329 plus 1 if the contents of the low 16 bits, treated as a signed number,
1330 is negative. */
1331 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1332 16, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_NADDR16_HA", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* 16 bit value resulting from allocating a 4 byte word to hold an
1346 address in the .sdata section, and returning the offset from
1347 _SDA_BASE_ for that relocation. */
1348 HOWTO (R_PPC_EMB_SDAI16, /* type */
1349 0, /* rightshift */
1350 1, /* size (0 = byte, 1 = short, 2 = long) */
1351 16, /* bitsize */
1352 FALSE, /* pc_relative */
1353 0, /* bitpos */
1354 complain_overflow_signed, /* complain_on_overflow */
1355 ppc_elf_unhandled_reloc, /* special_function */
1356 "R_PPC_EMB_SDAI16", /* name */
1357 FALSE, /* partial_inplace */
1358 0, /* src_mask */
1359 0xffff, /* dst_mask */
1360 FALSE), /* pcrel_offset */
1361
1362 /* 16 bit value resulting from allocating a 4 byte word to hold an
1363 address in the .sdata2 section, and returning the offset from
1364 _SDA2_BASE_ for that relocation. */
1365 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 FALSE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_signed, /* complain_on_overflow */
1372 ppc_elf_unhandled_reloc, /* special_function */
1373 "R_PPC_EMB_SDA2I16", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 FALSE), /* pcrel_offset */
1378
1379 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1380 small data items. */
1381 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1382 0, /* rightshift */
1383 1, /* size (0 = byte, 1 = short, 2 = long) */
1384 16, /* bitsize */
1385 FALSE, /* pc_relative */
1386 0, /* bitpos */
1387 complain_overflow_signed, /* complain_on_overflow */
1388 ppc_elf_unhandled_reloc, /* special_function */
1389 "R_PPC_EMB_SDA2REL", /* name */
1390 FALSE, /* partial_inplace */
1391 0, /* src_mask */
1392 0xffff, /* dst_mask */
1393 FALSE), /* pcrel_offset */
1394
1395 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1396 signed offset from the appropriate base, and filling in the register
1397 field with the appropriate register (0, 2, or 13). */
1398 HOWTO (R_PPC_EMB_SDA21, /* type */
1399 0, /* rightshift */
1400 2, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 FALSE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_signed, /* complain_on_overflow */
1405 ppc_elf_unhandled_reloc, /* special_function */
1406 "R_PPC_EMB_SDA21", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 FALSE), /* pcrel_offset */
1411
1412 /* Relocation not handled: R_PPC_EMB_MRKREF */
1413 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1414 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1415 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1416 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1417 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1418
1419 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1420 in the 16 bit signed offset from the appropriate base, and filling in the
1421 register field with the appropriate register (0, 2, or 13). */
1422 HOWTO (R_PPC_EMB_RELSDA, /* type */
1423 0, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_signed, /* complain_on_overflow */
1429 ppc_elf_unhandled_reloc, /* special_function */
1430 "R_PPC_EMB_RELSDA", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xffff, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* A relative 8 bit branch. */
1437 HOWTO (R_PPC_VLE_REL8, /* type */
1438 1, /* rightshift */
1439 1, /* size (0 = byte, 1 = short, 2 = long) */
1440 8, /* bitsize */
1441 TRUE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_signed, /* complain_on_overflow */
1444 bfd_elf_generic_reloc, /* special_function */
1445 "R_PPC_VLE_REL8", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 0xff, /* dst_mask */
1449 TRUE), /* pcrel_offset */
1450
1451 /* A relative 15 bit branch. */
1452 HOWTO (R_PPC_VLE_REL15, /* type */
1453 1, /* rightshift */
1454 2, /* size (0 = byte, 1 = short, 2 = long) */
1455 15, /* bitsize */
1456 TRUE, /* pc_relative */
1457 1, /* bitpos */
1458 complain_overflow_signed, /* complain_on_overflow */
1459 bfd_elf_generic_reloc, /* special_function */
1460 "R_PPC_VLE_REL15", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xfffe, /* dst_mask */
1464 TRUE), /* pcrel_offset */
1465
1466 /* A relative 24 bit branch. */
1467 HOWTO (R_PPC_VLE_REL24, /* type */
1468 1, /* rightshift */
1469 2, /* size (0 = byte, 1 = short, 2 = long) */
1470 24, /* bitsize */
1471 TRUE, /* pc_relative */
1472 1, /* bitpos */
1473 complain_overflow_signed, /* complain_on_overflow */
1474 bfd_elf_generic_reloc, /* special_function */
1475 "R_PPC_VLE_REL24", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 0x1fffffe, /* dst_mask */
1479 TRUE), /* pcrel_offset */
1480
1481 /* The 16 LSBS in split16a format. */
1482 HOWTO (R_PPC_VLE_LO16A, /* type */
1483 0, /* rightshift */
1484 2, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_dont, /* complain_on_overflow */
1489 ppc_elf_unhandled_reloc, /* special_function */
1490 "R_PPC_VLE_LO16A", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0x1f07ff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* The 16 LSBS in split16d format. */
1497 HOWTO (R_PPC_VLE_LO16D, /* type */
1498 0, /* rightshift */
1499 2, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc_elf_unhandled_reloc, /* special_function */
1505 "R_PPC_VLE_LO16D", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0x3e007ff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Bits 16-31 split16a format. */
1512 HOWTO (R_PPC_VLE_HI16A, /* type */
1513 16, /* rightshift */
1514 2, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc_elf_unhandled_reloc, /* special_function */
1520 "R_PPC_VLE_HI16A", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0x1f07ff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Bits 16-31 split16d format. */
1527 HOWTO (R_PPC_VLE_HI16D, /* type */
1528 16, /* rightshift */
1529 2, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc_elf_unhandled_reloc, /* special_function */
1535 "R_PPC_VLE_HI16D", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0x3e007ff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Bits 16-31 (High Adjusted) in split16a format. */
1542 HOWTO (R_PPC_VLE_HA16A, /* type */
1543 16, /* rightshift */
1544 2, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc_elf_unhandled_reloc, /* special_function */
1550 "R_PPC_VLE_HA16A", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0x1f07ff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Bits 16-31 (High Adjusted) in split16d format. */
1557 HOWTO (R_PPC_VLE_HA16D, /* type */
1558 16, /* rightshift */
1559 2, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc_elf_unhandled_reloc, /* special_function */
1565 "R_PPC_VLE_HA16D", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0x3e007ff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1572 instructions. If the register base is 0 then the linker changes
1573 the e_add16i to an e_li instruction. */
1574 HOWTO (R_PPC_VLE_SDA21, /* type */
1575 0, /* rightshift */
1576 2, /* size (0 = byte, 1 = short, 2 = long) */
1577 16, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_signed, /* complain_on_overflow */
1581 ppc_elf_unhandled_reloc, /* special_function */
1582 "R_PPC_VLE_SDA21", /* name */
1583 FALSE, /* partial_inplace */
1584 0, /* src_mask */
1585 0xffff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1589 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1590 0, /* rightshift */
1591 2, /* size (0 = byte, 1 = short, 2 = long) */
1592 16, /* bitsize */
1593 FALSE, /* pc_relative */
1594 0, /* bitpos */
1595 complain_overflow_dont, /* complain_on_overflow */
1596 ppc_elf_unhandled_reloc, /* special_function */
1597 "R_PPC_VLE_SDA21_LO", /* name */
1598 FALSE, /* partial_inplace */
1599 0, /* src_mask */
1600 0xffff, /* dst_mask */
1601 FALSE), /* pcrel_offset */
1602
1603 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1604 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1605 0, /* rightshift */
1606 2, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_dont, /* complain_on_overflow */
1611 ppc_elf_unhandled_reloc, /* special_function */
1612 "R_PPC_VLE_SDAREL_LO16A", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0x1f07ff, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1619 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1620 0, /* rightshift */
1621 2, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_dont, /* complain_on_overflow */
1626 ppc_elf_unhandled_reloc, /* special_function */
1627 "R_PPC_VLE_SDAREL_LO16D", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0x3e007ff, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1634 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1635 16, /* rightshift */
1636 2, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_dont, /* complain_on_overflow */
1641 ppc_elf_unhandled_reloc, /* special_function */
1642 "R_PPC_VLE_SDAREL_HI16A", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0x1f07ff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1649 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1650 16, /* rightshift */
1651 2, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc_elf_unhandled_reloc, /* special_function */
1657 "R_PPC_VLE_SDAREL_HI16D", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0x3e007ff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1664 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1665 16, /* rightshift */
1666 2, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc_elf_unhandled_reloc, /* special_function */
1672 "R_PPC_VLE_SDAREL_HA16A", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0x1f07ff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1679 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1680 16, /* rightshift */
1681 2, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc_elf_unhandled_reloc, /* special_function */
1687 "R_PPC_VLE_SDAREL_HA16D", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0x3e007ff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* e_li split20 format. */
1694 HOWTO (R_PPC_VLE_ADDR20, /* type */
1695 16, /* rightshift */
1696 2, /* size (0 = byte, 1 = short, 2 = long) */
1697 20, /* bitsize */
1698 FALSE, /* pc_relative */
1699 0, /* bitpos */
1700 complain_overflow_dont, /* complain_on_overflow */
1701 bfd_elf_generic_reloc, /* special_function */
1702 "R_PPC_VLE_ADDR20", /* name */
1703 FALSE, /* partial_inplace */
1704 0, /* src_mask */
1705 0x1f07ff, /* dst_mask */
1706 FALSE), /* pcrel_offset */
1707
1708 HOWTO (R_PPC_IRELATIVE, /* type */
1709 0, /* rightshift */
1710 2, /* size (0 = byte, 1 = short, 2 = long) */
1711 32, /* bitsize */
1712 FALSE, /* pc_relative */
1713 0, /* bitpos */
1714 complain_overflow_dont, /* complain_on_overflow */
1715 ppc_elf_unhandled_reloc, /* special_function */
1716 "R_PPC_IRELATIVE", /* name */
1717 FALSE, /* partial_inplace */
1718 0, /* src_mask */
1719 0xffffffff, /* dst_mask */
1720 FALSE), /* pcrel_offset */
1721
1722 /* A 16 bit relative relocation. */
1723 HOWTO (R_PPC_REL16, /* type */
1724 0, /* rightshift */
1725 1, /* size (0 = byte, 1 = short, 2 = long) */
1726 16, /* bitsize */
1727 TRUE, /* pc_relative */
1728 0, /* bitpos */
1729 complain_overflow_signed, /* complain_on_overflow */
1730 bfd_elf_generic_reloc, /* special_function */
1731 "R_PPC_REL16", /* name */
1732 FALSE, /* partial_inplace */
1733 0, /* src_mask */
1734 0xffff, /* dst_mask */
1735 TRUE), /* pcrel_offset */
1736
1737 /* A 16 bit relative relocation without overflow. */
1738 HOWTO (R_PPC_REL16_LO, /* type */
1739 0, /* rightshift */
1740 1, /* size (0 = byte, 1 = short, 2 = long) */
1741 16, /* bitsize */
1742 TRUE, /* pc_relative */
1743 0, /* bitpos */
1744 complain_overflow_dont,/* complain_on_overflow */
1745 bfd_elf_generic_reloc, /* special_function */
1746 "R_PPC_REL16_LO", /* name */
1747 FALSE, /* partial_inplace */
1748 0, /* src_mask */
1749 0xffff, /* dst_mask */
1750 TRUE), /* pcrel_offset */
1751
1752 /* The high order 16 bits of a relative address. */
1753 HOWTO (R_PPC_REL16_HI, /* type */
1754 16, /* rightshift */
1755 1, /* size (0 = byte, 1 = short, 2 = long) */
1756 16, /* bitsize */
1757 TRUE, /* pc_relative */
1758 0, /* bitpos */
1759 complain_overflow_dont, /* complain_on_overflow */
1760 bfd_elf_generic_reloc, /* special_function */
1761 "R_PPC_REL16_HI", /* name */
1762 FALSE, /* partial_inplace */
1763 0, /* src_mask */
1764 0xffff, /* dst_mask */
1765 TRUE), /* pcrel_offset */
1766
1767 /* The high order 16 bits of a relative address, plus 1 if the contents of
1768 the low 16 bits, treated as a signed number, is negative. */
1769 HOWTO (R_PPC_REL16_HA, /* type */
1770 16, /* rightshift */
1771 1, /* size (0 = byte, 1 = short, 2 = long) */
1772 16, /* bitsize */
1773 TRUE, /* pc_relative */
1774 0, /* bitpos */
1775 complain_overflow_dont, /* complain_on_overflow */
1776 ppc_elf_addr16_ha_reloc, /* special_function */
1777 "R_PPC_REL16_HA", /* name */
1778 FALSE, /* partial_inplace */
1779 0, /* src_mask */
1780 0xffff, /* dst_mask */
1781 TRUE), /* pcrel_offset */
1782
1783 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1784 HOWTO (R_PPC_REL16DX_HA, /* type */
1785 16, /* rightshift */
1786 2, /* size (0 = byte, 1 = short, 2 = long) */
1787 16, /* bitsize */
1788 TRUE, /* pc_relative */
1789 0, /* bitpos */
1790 complain_overflow_signed, /* complain_on_overflow */
1791 ppc_elf_addr16_ha_reloc, /* special_function */
1792 "R_PPC_REL16DX_HA", /* name */
1793 FALSE, /* partial_inplace */
1794 0, /* src_mask */
1795 0x1fffc1, /* dst_mask */
1796 TRUE), /* pcrel_offset */
1797
1798 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1799 HOWTO (R_PPC_16DX_HA, /* type */
1800 16, /* rightshift */
1801 2, /* size (0 = byte, 1 = short, 2 = long) */
1802 16, /* bitsize */
1803 FALSE, /* pc_relative */
1804 0, /* bitpos */
1805 complain_overflow_signed, /* complain_on_overflow */
1806 ppc_elf_addr16_ha_reloc, /* special_function */
1807 "R_PPC_16DX_HA", /* name */
1808 FALSE, /* partial_inplace */
1809 0, /* src_mask */
1810 0x1fffc1, /* dst_mask */
1811 FALSE), /* pcrel_offset */
1812
1813 /* GNU extension to record C++ vtable hierarchy. */
1814 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1815 0, /* rightshift */
1816 0, /* size (0 = byte, 1 = short, 2 = long) */
1817 0, /* bitsize */
1818 FALSE, /* pc_relative */
1819 0, /* bitpos */
1820 complain_overflow_dont, /* complain_on_overflow */
1821 NULL, /* special_function */
1822 "R_PPC_GNU_VTINHERIT", /* name */
1823 FALSE, /* partial_inplace */
1824 0, /* src_mask */
1825 0, /* dst_mask */
1826 FALSE), /* pcrel_offset */
1827
1828 /* GNU extension to record C++ vtable member usage. */
1829 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1830 0, /* rightshift */
1831 0, /* size (0 = byte, 1 = short, 2 = long) */
1832 0, /* bitsize */
1833 FALSE, /* pc_relative */
1834 0, /* bitpos */
1835 complain_overflow_dont, /* complain_on_overflow */
1836 NULL, /* special_function */
1837 "R_PPC_GNU_VTENTRY", /* name */
1838 FALSE, /* partial_inplace */
1839 0, /* src_mask */
1840 0, /* dst_mask */
1841 FALSE), /* pcrel_offset */
1842
1843 /* Phony reloc to handle AIX style TOC entries. */
1844 HOWTO (R_PPC_TOC16, /* type */
1845 0, /* rightshift */
1846 1, /* size (0 = byte, 1 = short, 2 = long) */
1847 16, /* bitsize */
1848 FALSE, /* pc_relative */
1849 0, /* bitpos */
1850 complain_overflow_signed, /* complain_on_overflow */
1851 ppc_elf_unhandled_reloc, /* special_function */
1852 "R_PPC_TOC16", /* name */
1853 FALSE, /* partial_inplace */
1854 0, /* src_mask */
1855 0xffff, /* dst_mask */
1856 FALSE), /* pcrel_offset */
1857 };
1858 \f
1859 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1860
1861 static void
1862 ppc_elf_howto_init (void)
1863 {
1864 unsigned int i, type;
1865
1866 for (i = 0;
1867 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1868 i++)
1869 {
1870 type = ppc_elf_howto_raw[i].type;
1871 if (type >= (sizeof (ppc_elf_howto_table)
1872 / sizeof (ppc_elf_howto_table[0])))
1873 abort ();
1874 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1875 }
1876 }
1877
1878 static reloc_howto_type *
1879 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1880 bfd_reloc_code_real_type code)
1881 {
1882 enum elf_ppc_reloc_type r;
1883
1884 /* Initialize howto table if not already done. */
1885 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1886 ppc_elf_howto_init ();
1887
1888 switch (code)
1889 {
1890 default:
1891 return NULL;
1892
1893 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1894 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1895 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1896 case BFD_RELOC_PPC64_ADDR16_DS:
1897 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1898 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1899 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1900 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1901 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1902 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1903 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1904 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1905 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1906 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1907 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1908 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1909 case BFD_RELOC_PPC64_GOT16_DS:
1910 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1911 case BFD_RELOC_PPC64_GOT16_LO_DS:
1912 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1913 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1914 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1915 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1916 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1917 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1918 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1919 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1920 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1921 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1922 case BFD_RELOC_PPC64_PLT16_LO_DS:
1923 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1924 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1925 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1926 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1927 case BFD_RELOC_PPC64_SECTOFF_DS:
1928 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1929 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1930 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1931 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1932 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1933 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1934 case BFD_RELOC_PPC64_TOC16_DS:
1935 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1936 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1937 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1938 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1939 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1940 case BFD_RELOC_PPC64_TPREL16_DS:
1941 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1942 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1943 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1944 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1945 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1946 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1947 case BFD_RELOC_PPC64_DTPREL16_DS:
1948 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1949 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1950 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1951 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1952 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1953 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1954 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1955 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1956 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1957 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1958 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1959 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1960 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1961 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1962 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1963 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1964 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1965 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1966 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1967 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1968 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1969 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1970 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1971 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1972 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1973 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1974 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1975 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1976 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1977 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1978 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1979 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1980 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1981 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1982 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1983 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1984 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1985 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1986 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1987 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1988 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1989 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1990 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1991 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1992 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1993 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1994 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1995 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1996 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1997 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1998 r = R_PPC_VLE_SDAREL_LO16A;
1999 break;
2000 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
2001 r = R_PPC_VLE_SDAREL_LO16D;
2002 break;
2003 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
2004 r = R_PPC_VLE_SDAREL_HI16A;
2005 break;
2006 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
2007 r = R_PPC_VLE_SDAREL_HI16D;
2008 break;
2009 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
2010 r = R_PPC_VLE_SDAREL_HA16A;
2011 break;
2012 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
2013 r = R_PPC_VLE_SDAREL_HA16D;
2014 break;
2015 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2016 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2017 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2018 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2019 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
2020 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2021 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2022 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2023 }
2024
2025 return ppc_elf_howto_table[r];
2026 };
2027
2028 static reloc_howto_type *
2029 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2030 const char *r_name)
2031 {
2032 unsigned int i;
2033
2034 for (i = 0;
2035 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2036 i++)
2037 if (ppc_elf_howto_raw[i].name != NULL
2038 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2039 return &ppc_elf_howto_raw[i];
2040
2041 return NULL;
2042 }
2043
2044 /* Set the howto pointer for a PowerPC ELF reloc. */
2045
2046 static bfd_boolean
2047 ppc_elf_info_to_howto (bfd *abfd,
2048 arelent *cache_ptr,
2049 Elf_Internal_Rela *dst)
2050 {
2051 unsigned int r_type;
2052
2053 /* Initialize howto table if not already done. */
2054 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2055 ppc_elf_howto_init ();
2056
2057 r_type = ELF32_R_TYPE (dst->r_info);
2058 if (r_type >= R_PPC_max)
2059 {
2060 /* xgettext:c-format */
2061 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2062 abfd, r_type);
2063 bfd_set_error (bfd_error_bad_value);
2064 return FALSE;
2065 }
2066
2067 cache_ptr->howto = ppc_elf_howto_table[r_type];
2068
2069 /* Just because the above assert didn't trigger doesn't mean that
2070 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2071 if (cache_ptr->howto == NULL)
2072 {
2073 /* xgettext:c-format */
2074 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2075 abfd, r_type);
2076 bfd_set_error (bfd_error_bad_value);
2077
2078 return FALSE;
2079 }
2080
2081 return TRUE;
2082 }
2083
2084 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2085
2086 static bfd_reloc_status_type
2087 ppc_elf_addr16_ha_reloc (bfd *abfd,
2088 arelent *reloc_entry,
2089 asymbol *symbol,
2090 void *data,
2091 asection *input_section,
2092 bfd *output_bfd,
2093 char **error_message ATTRIBUTE_UNUSED)
2094 {
2095 enum elf_ppc_reloc_type r_type;
2096 long insn;
2097 bfd_size_type octets;
2098 bfd_vma value;
2099
2100 if (output_bfd != NULL)
2101 {
2102 reloc_entry->address += input_section->output_offset;
2103 return bfd_reloc_ok;
2104 }
2105
2106 reloc_entry->addend += 0x8000;
2107 r_type = reloc_entry->howto->type;
2108 if (r_type != R_PPC_REL16DX_HA)
2109 return bfd_reloc_continue;
2110
2111 value = 0;
2112 if (!bfd_is_com_section (symbol->section))
2113 value = symbol->value;
2114 value += (reloc_entry->addend
2115 + symbol->section->output_offset
2116 + symbol->section->output_section->vma);
2117 value -= (reloc_entry->address
2118 + input_section->output_offset
2119 + input_section->output_section->vma);
2120 value >>= 16;
2121
2122 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2123 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2124 insn &= ~0x1fffc1;
2125 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2126 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2127 return bfd_reloc_ok;
2128 }
2129
2130 static bfd_reloc_status_type
2131 ppc_elf_unhandled_reloc (bfd *abfd,
2132 arelent *reloc_entry,
2133 asymbol *symbol,
2134 void *data,
2135 asection *input_section,
2136 bfd *output_bfd,
2137 char **error_message)
2138 {
2139 /* If this is a relocatable link (output_bfd test tells us), just
2140 call the generic function. Any adjustment will be done at final
2141 link time. */
2142 if (output_bfd != NULL)
2143 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2144 input_section, output_bfd, error_message);
2145
2146 if (error_message != NULL)
2147 {
2148 static char buf[60];
2149 sprintf (buf, _("generic linker can't handle %s"),
2150 reloc_entry->howto->name);
2151 *error_message = buf;
2152 }
2153 return bfd_reloc_dangerous;
2154 }
2155 \f
2156 /* Sections created by the linker. */
2157
2158 typedef struct elf_linker_section
2159 {
2160 /* Pointer to the bfd section. */
2161 asection *section;
2162 /* Section name. */
2163 const char *name;
2164 /* Associated bss section name. */
2165 const char *bss_name;
2166 /* Associated symbol name. */
2167 const char *sym_name;
2168 /* Associated symbol. */
2169 struct elf_link_hash_entry *sym;
2170 } elf_linker_section_t;
2171
2172 /* Linked list of allocated pointer entries. This hangs off of the
2173 symbol lists, and provides allows us to return different pointers,
2174 based on different addend's. */
2175
2176 typedef struct elf_linker_section_pointers
2177 {
2178 /* next allocated pointer for this symbol */
2179 struct elf_linker_section_pointers *next;
2180 /* offset of pointer from beginning of section */
2181 bfd_vma offset;
2182 /* addend used */
2183 bfd_vma addend;
2184 /* which linker section this is */
2185 elf_linker_section_t *lsect;
2186 } elf_linker_section_pointers_t;
2187
2188 struct ppc_elf_obj_tdata
2189 {
2190 struct elf_obj_tdata elf;
2191
2192 /* A mapping from local symbols to offsets into the various linker
2193 sections added. This is index by the symbol index. */
2194 elf_linker_section_pointers_t **linker_section_pointers;
2195
2196 /* Flags used to auto-detect plt type. */
2197 unsigned int makes_plt_call : 1;
2198 unsigned int has_rel16 : 1;
2199 };
2200
2201 #define ppc_elf_tdata(bfd) \
2202 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2203
2204 #define elf_local_ptr_offsets(bfd) \
2205 (ppc_elf_tdata (bfd)->linker_section_pointers)
2206
2207 #define is_ppc_elf(bfd) \
2208 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2209 && elf_object_id (bfd) == PPC32_ELF_DATA)
2210
2211 /* Override the generic function because we store some extras. */
2212
2213 static bfd_boolean
2214 ppc_elf_mkobject (bfd *abfd)
2215 {
2216 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2217 PPC32_ELF_DATA);
2218 }
2219
2220 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2221
2222 bfd_boolean
2223 _bfd_elf_ppc_set_arch (bfd *abfd)
2224 {
2225 unsigned long mach = 0;
2226 asection *s;
2227 unsigned char *contents;
2228
2229 if (abfd->arch_info->bits_per_word == 32
2230 && bfd_big_endian (abfd))
2231 {
2232
2233 for (s = abfd->sections; s != NULL; s = s->next)
2234 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2235 break;
2236 if (s != NULL)
2237 mach = bfd_mach_ppc_vle;
2238 }
2239
2240 if (mach == 0)
2241 {
2242 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2243 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2244 {
2245 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2246 unsigned int i;
2247
2248 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2249 {
2250 unsigned int val = bfd_get_32 (abfd, contents + i);
2251 switch (val >> 16)
2252 {
2253 case PPC_APUINFO_PMR:
2254 case PPC_APUINFO_RFMCI:
2255 if (mach == 0)
2256 mach = bfd_mach_ppc_titan;
2257 break;
2258
2259 case PPC_APUINFO_ISEL:
2260 case PPC_APUINFO_CACHELCK:
2261 if (mach == bfd_mach_ppc_titan)
2262 mach = bfd_mach_ppc_e500mc;
2263 break;
2264
2265 case PPC_APUINFO_SPE:
2266 case PPC_APUINFO_EFS:
2267 case PPC_APUINFO_BRLOCK:
2268 if (mach != bfd_mach_ppc_vle)
2269 mach = bfd_mach_ppc_e500;
2270 break;
2271
2272 case PPC_APUINFO_VLE:
2273 mach = bfd_mach_ppc_vle;
2274 break;
2275
2276 default:
2277 mach = -1ul;
2278 }
2279 }
2280 free (contents);
2281 }
2282 }
2283
2284 if (mach != 0 && mach != -1ul)
2285 {
2286 const bfd_arch_info_type *arch;
2287
2288 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2289 if (arch->mach == mach)
2290 {
2291 abfd->arch_info = arch;
2292 break;
2293 }
2294 }
2295 return TRUE;
2296 }
2297
2298 /* Fix bad default arch selected for a 32 bit input bfd when the
2299 default is 64 bit. Also select arch based on apuinfo. */
2300
2301 static bfd_boolean
2302 ppc_elf_object_p (bfd *abfd)
2303 {
2304 if (!abfd->arch_info->the_default)
2305 return TRUE;
2306
2307 if (abfd->arch_info->bits_per_word == 64)
2308 {
2309 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2310
2311 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2312 {
2313 /* Relies on arch after 64 bit default being 32 bit default. */
2314 abfd->arch_info = abfd->arch_info->next;
2315 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2316 }
2317 }
2318 return _bfd_elf_ppc_set_arch (abfd);
2319 }
2320
2321 /* Function to set whether a module needs the -mrelocatable bit set. */
2322
2323 static bfd_boolean
2324 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2325 {
2326 BFD_ASSERT (!elf_flags_init (abfd)
2327 || elf_elfheader (abfd)->e_flags == flags);
2328
2329 elf_elfheader (abfd)->e_flags = flags;
2330 elf_flags_init (abfd) = TRUE;
2331 return TRUE;
2332 }
2333
2334 /* Support for core dump NOTE sections. */
2335
2336 static bfd_boolean
2337 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2338 {
2339 int offset;
2340 unsigned int size;
2341
2342 switch (note->descsz)
2343 {
2344 default:
2345 return FALSE;
2346
2347 case 268: /* Linux/PPC. */
2348 /* pr_cursig */
2349 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2350
2351 /* pr_pid */
2352 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2353
2354 /* pr_reg */
2355 offset = 72;
2356 size = 192;
2357
2358 break;
2359 }
2360
2361 /* Make a ".reg/999" section. */
2362 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2363 size, note->descpos + offset);
2364 }
2365
2366 static bfd_boolean
2367 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2368 {
2369 switch (note->descsz)
2370 {
2371 default:
2372 return FALSE;
2373
2374 case 128: /* Linux/PPC elf_prpsinfo. */
2375 elf_tdata (abfd)->core->pid
2376 = bfd_get_32 (abfd, note->descdata + 16);
2377 elf_tdata (abfd)->core->program
2378 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2379 elf_tdata (abfd)->core->command
2380 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2381 }
2382
2383 /* Note that for some reason, a spurious space is tacked
2384 onto the end of the args in some (at least one anyway)
2385 implementations, so strip it off if it exists. */
2386
2387 {
2388 char *command = elf_tdata (abfd)->core->command;
2389 int n = strlen (command);
2390
2391 if (0 < n && command[n - 1] == ' ')
2392 command[n - 1] = '\0';
2393 }
2394
2395 return TRUE;
2396 }
2397
2398 static char *
2399 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2400 {
2401 switch (note_type)
2402 {
2403 default:
2404 return NULL;
2405
2406 case NT_PRPSINFO:
2407 {
2408 char data[128] ATTRIBUTE_NONSTRING;
2409 va_list ap;
2410
2411 va_start (ap, note_type);
2412 memset (data, 0, sizeof (data));
2413 strncpy (data + 32, va_arg (ap, const char *), 16);
2414 strncpy (data + 48, va_arg (ap, const char *), 80);
2415 va_end (ap);
2416 return elfcore_write_note (abfd, buf, bufsiz,
2417 "CORE", note_type, data, sizeof (data));
2418 }
2419
2420 case NT_PRSTATUS:
2421 {
2422 char data[268];
2423 va_list ap;
2424 long pid;
2425 int cursig;
2426 const void *greg;
2427
2428 va_start (ap, note_type);
2429 memset (data, 0, 72);
2430 pid = va_arg (ap, long);
2431 bfd_put_32 (abfd, pid, data + 24);
2432 cursig = va_arg (ap, int);
2433 bfd_put_16 (abfd, cursig, data + 12);
2434 greg = va_arg (ap, const void *);
2435 memcpy (data + 72, greg, 192);
2436 memset (data + 264, 0, 4);
2437 va_end (ap);
2438 return elfcore_write_note (abfd, buf, bufsiz,
2439 "CORE", note_type, data, sizeof (data));
2440 }
2441 }
2442 }
2443
2444 static flagword
2445 ppc_elf_lookup_section_flags (char *flag_name)
2446 {
2447
2448 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2449 return SHF_PPC_VLE;
2450
2451 return 0;
2452 }
2453
2454 /* Return address for Ith PLT stub in section PLT, for relocation REL
2455 or (bfd_vma) -1 if it should not be included. */
2456
2457 static bfd_vma
2458 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2459 const asection *plt ATTRIBUTE_UNUSED,
2460 const arelent *rel)
2461 {
2462 return rel->address;
2463 }
2464
2465 /* Handle a PowerPC specific section when reading an object file. This
2466 is called when bfd_section_from_shdr finds a section with an unknown
2467 type. */
2468
2469 static bfd_boolean
2470 ppc_elf_section_from_shdr (bfd *abfd,
2471 Elf_Internal_Shdr *hdr,
2472 const char *name,
2473 int shindex)
2474 {
2475 asection *newsect;
2476 flagword flags;
2477
2478 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2479 return FALSE;
2480
2481 newsect = hdr->bfd_section;
2482 flags = bfd_get_section_flags (abfd, newsect);
2483 if (hdr->sh_flags & SHF_EXCLUDE)
2484 flags |= SEC_EXCLUDE;
2485
2486 if (hdr->sh_type == SHT_ORDERED)
2487 flags |= SEC_SORT_ENTRIES;
2488
2489 bfd_set_section_flags (abfd, newsect, flags);
2490 return TRUE;
2491 }
2492
2493 /* Set up any other section flags and such that may be necessary. */
2494
2495 static bfd_boolean
2496 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2497 Elf_Internal_Shdr *shdr,
2498 asection *asect)
2499 {
2500 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2501 shdr->sh_type = SHT_ORDERED;
2502
2503 return TRUE;
2504 }
2505
2506 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2507 need to bump up the number of section headers. */
2508
2509 static int
2510 ppc_elf_additional_program_headers (bfd *abfd,
2511 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2512 {
2513 asection *s;
2514 int ret = 0;
2515
2516 s = bfd_get_section_by_name (abfd, ".sbss2");
2517 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2518 ++ret;
2519
2520 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2521 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2522 ++ret;
2523
2524 return ret;
2525 }
2526
2527 /* Modify the segment map for VLE executables. */
2528
2529 bfd_boolean
2530 ppc_elf_modify_segment_map (bfd *abfd,
2531 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2532 {
2533 struct elf_segment_map *m;
2534
2535 /* At this point in the link, output sections have already been sorted by
2536 LMA and assigned to segments. All that is left to do is to ensure
2537 there is no mixing of VLE & non-VLE sections in a text segment.
2538 If we find that case, we split the segment.
2539 We maintain the original output section order. */
2540
2541 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2542 {
2543 struct elf_segment_map *n;
2544 bfd_size_type amt;
2545 unsigned int j, k;
2546 unsigned int p_flags;
2547
2548 if (m->p_type != PT_LOAD || m->count == 0)
2549 continue;
2550
2551 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2552 {
2553 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2554 p_flags |= PF_W;
2555 if ((m->sections[j]->flags & SEC_CODE) != 0)
2556 {
2557 p_flags |= PF_X;
2558 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2559 p_flags |= PF_PPC_VLE;
2560 break;
2561 }
2562 }
2563 if (j != m->count)
2564 while (++j != m->count)
2565 {
2566 unsigned int p_flags1 = PF_R;
2567
2568 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2569 p_flags1 |= PF_W;
2570 if ((m->sections[j]->flags & SEC_CODE) != 0)
2571 {
2572 p_flags1 |= PF_X;
2573 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2574 p_flags1 |= PF_PPC_VLE;
2575 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2576 break;
2577 }
2578 p_flags |= p_flags1;
2579 }
2580 /* If we're splitting a segment which originally contained rw
2581 sections then those sections might now only be in one of the
2582 two parts. So always set p_flags if splitting, even if we
2583 are being called for objcopy with p_flags_valid set. */
2584 if (j != m->count || !m->p_flags_valid)
2585 {
2586 m->p_flags_valid = 1;
2587 m->p_flags = p_flags;
2588 }
2589 if (j == m->count)
2590 continue;
2591
2592 /* Sections 0..j-1 stay in this (current) segment,
2593 the remainder are put in a new segment.
2594 The scan resumes with the new segment. */
2595
2596 amt = sizeof (struct elf_segment_map);
2597 amt += (m->count - j - 1) * sizeof (asection *);
2598 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2599 if (n == NULL)
2600 return FALSE;
2601
2602 n->p_type = PT_LOAD;
2603 n->count = m->count - j;
2604 for (k = 0; k < n->count; ++k)
2605 n->sections[k] = m->sections[j + k];
2606 m->count = j;
2607 m->p_size_valid = 0;
2608 n->next = m->next;
2609 m->next = n;
2610 }
2611
2612 return TRUE;
2613 }
2614
2615 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2616 .PPC.EMB.sbss0 a normal section, and not a bss section so
2617 that the linker doesn't crater when trying to make more than
2618 2 sections. */
2619
2620 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2621 {
2622 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2623 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2624 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2625 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2626 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2627 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2628 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2629 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2630 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2631 { NULL, 0, 0, 0, 0 }
2632 };
2633
2634 /* This is what we want for new plt/got. */
2635 static struct bfd_elf_special_section ppc_alt_plt =
2636 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2637
2638 static const struct bfd_elf_special_section *
2639 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2640 {
2641 const struct bfd_elf_special_section *ssect;
2642
2643 /* See if this is one of the special sections. */
2644 if (sec->name == NULL)
2645 return NULL;
2646
2647 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2648 sec->use_rela_p);
2649 if (ssect != NULL)
2650 {
2651 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2652 ssect = &ppc_alt_plt;
2653 return ssect;
2654 }
2655
2656 return _bfd_elf_get_sec_type_attr (abfd, sec);
2657 }
2658 \f
2659 /* Very simple linked list structure for recording apuinfo values. */
2660 typedef struct apuinfo_list
2661 {
2662 struct apuinfo_list *next;
2663 unsigned long value;
2664 }
2665 apuinfo_list;
2666
2667 static apuinfo_list *head;
2668 static bfd_boolean apuinfo_set;
2669
2670 static void
2671 apuinfo_list_init (void)
2672 {
2673 head = NULL;
2674 apuinfo_set = FALSE;
2675 }
2676
2677 static void
2678 apuinfo_list_add (unsigned long value)
2679 {
2680 apuinfo_list *entry = head;
2681
2682 while (entry != NULL)
2683 {
2684 if (entry->value == value)
2685 return;
2686 entry = entry->next;
2687 }
2688
2689 entry = bfd_malloc (sizeof (* entry));
2690 if (entry == NULL)
2691 return;
2692
2693 entry->value = value;
2694 entry->next = head;
2695 head = entry;
2696 }
2697
2698 static unsigned
2699 apuinfo_list_length (void)
2700 {
2701 apuinfo_list *entry;
2702 unsigned long count;
2703
2704 for (entry = head, count = 0;
2705 entry;
2706 entry = entry->next)
2707 ++ count;
2708
2709 return count;
2710 }
2711
2712 static inline unsigned long
2713 apuinfo_list_element (unsigned long number)
2714 {
2715 apuinfo_list * entry;
2716
2717 for (entry = head;
2718 entry && number --;
2719 entry = entry->next)
2720 ;
2721
2722 return entry ? entry->value : 0;
2723 }
2724
2725 static void
2726 apuinfo_list_finish (void)
2727 {
2728 apuinfo_list *entry;
2729
2730 for (entry = head; entry;)
2731 {
2732 apuinfo_list *next = entry->next;
2733 free (entry);
2734 entry = next;
2735 }
2736
2737 head = NULL;
2738 }
2739
2740 /* Scan the input BFDs and create a linked list of
2741 the APUinfo values that will need to be emitted. */
2742
2743 static void
2744 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2745 {
2746 bfd *ibfd;
2747 asection *asec;
2748 char *buffer = NULL;
2749 bfd_size_type largest_input_size = 0;
2750 unsigned i;
2751 unsigned long length;
2752 const char *error_message = NULL;
2753
2754 if (link_info == NULL)
2755 return;
2756
2757 apuinfo_list_init ();
2758
2759 /* Read in the input sections contents. */
2760 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2761 {
2762 unsigned long datum;
2763
2764 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2765 if (asec == NULL)
2766 continue;
2767
2768 /* xgettext:c-format */
2769 error_message = _("corrupt %s section in %pB");
2770 length = asec->size;
2771 if (length < 20)
2772 goto fail;
2773
2774 apuinfo_set = TRUE;
2775 if (largest_input_size < asec->size)
2776 {
2777 if (buffer)
2778 free (buffer);
2779 largest_input_size = asec->size;
2780 buffer = bfd_malloc (largest_input_size);
2781 if (!buffer)
2782 return;
2783 }
2784
2785 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2786 || (bfd_bread (buffer, length, ibfd) != length))
2787 {
2788 /* xgettext:c-format */
2789 error_message = _("unable to read in %s section from %pB");
2790 goto fail;
2791 }
2792
2793 /* Verify the contents of the header. Note - we have to
2794 extract the values this way in order to allow for a
2795 host whose endian-ness is different from the target. */
2796 datum = bfd_get_32 (ibfd, buffer);
2797 if (datum != sizeof APUINFO_LABEL)
2798 goto fail;
2799
2800 datum = bfd_get_32 (ibfd, buffer + 8);
2801 if (datum != 0x2)
2802 goto fail;
2803
2804 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2805 goto fail;
2806
2807 /* Get the number of bytes used for apuinfo entries. */
2808 datum = bfd_get_32 (ibfd, buffer + 4);
2809 if (datum + 20 != length)
2810 goto fail;
2811
2812 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2813 for (i = 0; i < datum; i += 4)
2814 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2815 }
2816
2817 error_message = NULL;
2818
2819 if (apuinfo_set)
2820 {
2821 /* Compute the size of the output section. */
2822 unsigned num_entries = apuinfo_list_length ();
2823
2824 /* Set the output section size, if it exists. */
2825 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2826
2827 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2828 {
2829 ibfd = abfd;
2830 /* xgettext:c-format */
2831 error_message = _("warning: unable to set size of %s section in %pB");
2832 }
2833 }
2834
2835 fail:
2836 if (buffer)
2837 free (buffer);
2838
2839 if (error_message)
2840 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
2841 }
2842
2843 /* Prevent the output section from accumulating the input sections'
2844 contents. We have already stored this in our linked list structure. */
2845
2846 static bfd_boolean
2847 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2848 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2849 asection *asec,
2850 bfd_byte *contents ATTRIBUTE_UNUSED)
2851 {
2852 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2853 }
2854
2855 /* Finally we can generate the output section. */
2856
2857 static void
2858 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2859 {
2860 bfd_byte *buffer;
2861 asection *asec;
2862 unsigned i;
2863 unsigned num_entries;
2864 bfd_size_type length;
2865
2866 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2867 if (asec == NULL)
2868 return;
2869
2870 if (!apuinfo_set)
2871 return;
2872
2873 length = asec->size;
2874 if (length < 20)
2875 return;
2876
2877 buffer = bfd_malloc (length);
2878 if (buffer == NULL)
2879 {
2880 _bfd_error_handler
2881 (_("failed to allocate space for new APUinfo section"));
2882 return;
2883 }
2884
2885 /* Create the apuinfo header. */
2886 num_entries = apuinfo_list_length ();
2887 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2888 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2889 bfd_put_32 (abfd, 0x2, buffer + 8);
2890 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2891
2892 length = 20;
2893 for (i = 0; i < num_entries; i++)
2894 {
2895 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2896 length += 4;
2897 }
2898
2899 if (length != asec->size)
2900 _bfd_error_handler (_("failed to compute new APUinfo section"));
2901
2902 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2903 _bfd_error_handler (_("failed to install new APUinfo section"));
2904
2905 free (buffer);
2906
2907 apuinfo_list_finish ();
2908 }
2909 \f
2910 static bfd_boolean
2911 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2912 {
2913 bfd_byte buf[4 * 4];
2914
2915 if (!bfd_get_section_contents (abfd, glink, buf, off, sizeof buf))
2916 return FALSE;
2917
2918 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2919 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2920 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2921 && bfd_get_32 (abfd, buf + 12) == BCTR);
2922 }
2923
2924 static bfd_boolean
2925 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2926 {
2927 bfd_vma vma = *(bfd_vma *) ptr;
2928 return ((section->flags & SEC_ALLOC) != 0
2929 && section->vma <= vma
2930 && vma < section->vma + section->size);
2931 }
2932
2933 static long
2934 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2935 long dynsymcount, asymbol **dynsyms,
2936 asymbol **ret)
2937 {
2938 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2939 asection *plt, *relplt, *dynamic, *glink;
2940 bfd_vma glink_vma = 0;
2941 bfd_vma resolv_vma = 0;
2942 bfd_vma stub_off;
2943 asymbol *s;
2944 arelent *p;
2945 long count, i, stub_delta;
2946 size_t size;
2947 char *names;
2948 bfd_byte buf[4];
2949
2950 *ret = NULL;
2951
2952 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2953 return 0;
2954
2955 if (dynsymcount <= 0)
2956 return 0;
2957
2958 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2959 if (relplt == NULL)
2960 return 0;
2961
2962 plt = bfd_get_section_by_name (abfd, ".plt");
2963 if (plt == NULL)
2964 return 0;
2965
2966 /* Call common code to handle old-style executable PLTs. */
2967 if (elf_section_flags (plt) & SHF_EXECINSTR)
2968 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2969 dynsymcount, dynsyms, ret);
2970
2971 /* If this object was prelinked, the prelinker stored the address
2972 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2973 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2974 if (dynamic != NULL)
2975 {
2976 bfd_byte *dynbuf, *extdyn, *extdynend;
2977 size_t extdynsize;
2978 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2979
2980 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2981 return -1;
2982
2983 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2984 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2985
2986 extdyn = dynbuf;
2987 extdynend = extdyn + dynamic->size;
2988 for (; extdyn < extdynend; extdyn += extdynsize)
2989 {
2990 Elf_Internal_Dyn dyn;
2991 (*swap_dyn_in) (abfd, extdyn, &dyn);
2992
2993 if (dyn.d_tag == DT_NULL)
2994 break;
2995
2996 if (dyn.d_tag == DT_PPC_GOT)
2997 {
2998 unsigned int g_o_t = dyn.d_un.d_val;
2999 asection *got = bfd_get_section_by_name (abfd, ".got");
3000 if (got != NULL
3001 && bfd_get_section_contents (abfd, got, buf,
3002 g_o_t - got->vma + 4, 4))
3003 glink_vma = bfd_get_32 (abfd, buf);
3004 break;
3005 }
3006 }
3007 free (dynbuf);
3008 }
3009
3010 /* Otherwise we read the first plt entry. */
3011 if (glink_vma == 0)
3012 {
3013 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3014 glink_vma = bfd_get_32 (abfd, buf);
3015 }
3016
3017 if (glink_vma == 0)
3018 return 0;
3019
3020 /* The .glink section usually does not survive the final
3021 link; search for the section (usually .text) where the
3022 glink stubs now reside. */
3023 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3024 if (glink == NULL)
3025 return 0;
3026
3027 /* Determine glink PLT resolver by reading the relative branch
3028 from the first glink stub. */
3029 if (bfd_get_section_contents (abfd, glink, buf,
3030 glink_vma - glink->vma, 4))
3031 {
3032 unsigned int insn = bfd_get_32 (abfd, buf);
3033
3034 /* The first glink stub may either branch to the resolver ... */
3035 insn ^= B;
3036 if ((insn & ~0x3fffffc) == 0)
3037 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3038
3039 /* ... or fall through a bunch of NOPs. */
3040 else if ((insn ^ B ^ NOP) == 0)
3041 for (i = 4;
3042 bfd_get_section_contents (abfd, glink, buf,
3043 glink_vma - glink->vma + i, 4);
3044 i += 4)
3045 if (bfd_get_32 (abfd, buf) != NOP)
3046 {
3047 resolv_vma = glink_vma + i;
3048 break;
3049 }
3050 }
3051
3052 count = relplt->size / sizeof (Elf32_External_Rela);
3053 /* If the stubs are those for -shared/-pie then we might have
3054 multiple stubs for each plt entry. If that is the case then
3055 there is no way to associate stubs with their plt entries short
3056 of figuring out the GOT pointer value used in the stub.
3057 The offsets tested here need to cover all possible values of
3058 GLINK_ENTRY_SIZE for other than __tls_get_addr_opt. */
3059 stub_off = glink_vma - glink->vma;
3060 for (stub_delta = 16; stub_delta <= 32; stub_delta += 8)
3061 if (is_nonpic_glink_stub (abfd, glink, stub_off - stub_delta))
3062 break;
3063 if (stub_delta > 32)
3064 return 0;
3065
3066 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3067 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3068 return -1;
3069
3070 size = count * sizeof (asymbol);
3071 p = relplt->relocation;
3072 for (i = 0; i < count; i++, p++)
3073 {
3074 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3075 if (p->addend != 0)
3076 size += sizeof ("+0x") - 1 + 8;
3077 }
3078
3079 size += sizeof (asymbol) + sizeof ("__glink");
3080
3081 if (resolv_vma)
3082 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3083
3084 s = *ret = bfd_malloc (size);
3085 if (s == NULL)
3086 return -1;
3087
3088 stub_off = glink_vma - glink->vma;
3089 names = (char *) (s + count + 1 + (resolv_vma != 0));
3090 p = relplt->relocation + count - 1;
3091 for (i = 0; i < count; i++)
3092 {
3093 size_t len;
3094
3095 stub_off -= stub_delta;
3096 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3097 stub_off -= 32;
3098 *s = **p->sym_ptr_ptr;
3099 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3100 we are defining a symbol, ensure one of them is set. */
3101 if ((s->flags & BSF_LOCAL) == 0)
3102 s->flags |= BSF_GLOBAL;
3103 s->flags |= BSF_SYNTHETIC;
3104 s->section = glink;
3105 s->value = stub_off;
3106 s->name = names;
3107 s->udata.p = NULL;
3108 len = strlen ((*p->sym_ptr_ptr)->name);
3109 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3110 names += len;
3111 if (p->addend != 0)
3112 {
3113 memcpy (names, "+0x", sizeof ("+0x") - 1);
3114 names += sizeof ("+0x") - 1;
3115 bfd_sprintf_vma (abfd, names, p->addend);
3116 names += strlen (names);
3117 }
3118 memcpy (names, "@plt", sizeof ("@plt"));
3119 names += sizeof ("@plt");
3120 ++s;
3121 --p;
3122 }
3123
3124 /* Add a symbol at the start of the glink branch table. */
3125 memset (s, 0, sizeof *s);
3126 s->the_bfd = abfd;
3127 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3128 s->section = glink;
3129 s->value = glink_vma - glink->vma;
3130 s->name = names;
3131 memcpy (names, "__glink", sizeof ("__glink"));
3132 names += sizeof ("__glink");
3133 s++;
3134 count++;
3135
3136 if (resolv_vma)
3137 {
3138 /* Add a symbol for the glink PLT resolver. */
3139 memset (s, 0, sizeof *s);
3140 s->the_bfd = abfd;
3141 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3142 s->section = glink;
3143 s->value = resolv_vma - glink->vma;
3144 s->name = names;
3145 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3146 names += sizeof ("__glink_PLTresolve");
3147 s++;
3148 count++;
3149 }
3150
3151 return count;
3152 }
3153 \f
3154 /* The following functions are specific to the ELF linker, while
3155 functions above are used generally. They appear in this file more
3156 or less in the order in which they are called. eg.
3157 ppc_elf_check_relocs is called early in the link process,
3158 ppc_elf_finish_dynamic_sections is one of the last functions
3159 called. */
3160
3161 /* Track PLT entries needed for a given symbol. We might need more
3162 than one glink entry per symbol when generating a pic binary. */
3163 struct plt_entry
3164 {
3165 struct plt_entry *next;
3166
3167 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3168 This field stores the offset into .got2 used to initialise the
3169 GOT pointer reg. It will always be at least 32768. (Current
3170 gcc always uses an offset of 32768, but ld -r will pack .got2
3171 sections together resulting in larger offsets). */
3172 bfd_vma addend;
3173
3174 /* The .got2 section. */
3175 asection *sec;
3176
3177 /* PLT refcount or offset. */
3178 union
3179 {
3180 bfd_signed_vma refcount;
3181 bfd_vma offset;
3182 } plt;
3183
3184 /* .glink stub offset. */
3185 bfd_vma glink_offset;
3186 };
3187
3188 /* Of those relocs that might be copied as dynamic relocs, this
3189 function selects those that must be copied when linking a shared
3190 library or PIE, even when the symbol is local. */
3191
3192 static int
3193 must_be_dyn_reloc (struct bfd_link_info *info,
3194 enum elf_ppc_reloc_type r_type)
3195 {
3196 switch (r_type)
3197 {
3198 default:
3199 /* Only relative relocs can be resolved when the object load
3200 address isn't fixed. DTPREL32 is excluded because the
3201 dynamic linker needs to differentiate global dynamic from
3202 local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
3203 return 1;
3204
3205 case R_PPC_REL24:
3206 case R_PPC_REL14:
3207 case R_PPC_REL14_BRTAKEN:
3208 case R_PPC_REL14_BRNTAKEN:
3209 case R_PPC_REL32:
3210 return 0;
3211
3212 case R_PPC_TPREL32:
3213 case R_PPC_TPREL16:
3214 case R_PPC_TPREL16_LO:
3215 case R_PPC_TPREL16_HI:
3216 case R_PPC_TPREL16_HA:
3217 /* These relocations are relative but in a shared library the
3218 linker doesn't know the thread pointer base. */
3219 return bfd_link_dll (info);
3220 }
3221 }
3222
3223 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3224 copying dynamic variables from a shared lib into an app's dynbss
3225 section, and instead use a dynamic relocation to point into the
3226 shared lib. */
3227 #define ELIMINATE_COPY_RELOCS 1
3228
3229 /* Used to track dynamic relocations for local symbols. */
3230 struct ppc_dyn_relocs
3231 {
3232 struct ppc_dyn_relocs *next;
3233
3234 /* The input section of the reloc. */
3235 asection *sec;
3236
3237 /* Total number of relocs copied for the input section. */
3238 unsigned int count : 31;
3239
3240 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3241 unsigned int ifunc : 1;
3242 };
3243
3244 /* PPC ELF linker hash entry. */
3245
3246 struct ppc_elf_link_hash_entry
3247 {
3248 struct elf_link_hash_entry elf;
3249
3250 /* If this symbol is used in the linker created sections, the processor
3251 specific backend uses this field to map the field into the offset
3252 from the beginning of the section. */
3253 elf_linker_section_pointers_t *linker_section_pointer;
3254
3255 /* Track dynamic relocs copied for this symbol. */
3256 struct elf_dyn_relocs *dyn_relocs;
3257
3258 /* Contexts in which symbol is used in the GOT.
3259 Bits are or'd into the mask as the corresponding relocs are
3260 encountered during check_relocs, with TLS_TLS being set when any
3261 of the other TLS bits are set. tls_optimize clears bits when
3262 optimizing to indicate the corresponding GOT entry type is not
3263 needed. If set, TLS_TLS is never cleared. tls_optimize may also
3264 set TLS_TPRELGD when a GD reloc turns into a TPREL one. We use a
3265 separate flag rather than setting TPREL just for convenience in
3266 distinguishing the two cases.
3267 These flags are also kept for local symbols. */
3268 #define TLS_TLS 1 /* Any TLS reloc. */
3269 #define TLS_GD 2 /* GD reloc. */
3270 #define TLS_LD 4 /* LD reloc. */
3271 #define TLS_TPREL 8 /* TPREL reloc, => IE. */
3272 #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */
3273 #define TLS_MARK 32 /* __tls_get_addr call marked. */
3274 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3275 unsigned char tls_mask;
3276
3277 /* The above field is also used to mark function symbols. In which
3278 case TLS_TLS will be 0. */
3279 #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */
3280 #define PLT_KEEP 4 /* inline plt call requires plt entry. */
3281 #define NON_GOT 256 /* local symbol plt, not stored. */
3282
3283 /* Nonzero if we have seen a small data relocation referring to this
3284 symbol. */
3285 unsigned char has_sda_refs : 1;
3286
3287 /* Flag use of given relocations. */
3288 unsigned char has_addr16_ha : 1;
3289 unsigned char has_addr16_lo : 1;
3290 };
3291
3292 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3293
3294 /* PPC ELF linker hash table. */
3295
3296 struct ppc_elf_link_hash_table
3297 {
3298 struct elf_link_hash_table elf;
3299
3300 /* Various options passed from the linker. */
3301 struct ppc_elf_params *params;
3302
3303 /* Short-cuts to get to dynamic linker sections. */
3304 asection *glink;
3305 asection *dynsbss;
3306 asection *relsbss;
3307 elf_linker_section_t sdata[2];
3308 asection *sbss;
3309 asection *glink_eh_frame;
3310 asection *pltlocal;
3311 asection *relpltlocal;
3312
3313 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3314 asection *srelplt2;
3315
3316 /* Shortcut to __tls_get_addr. */
3317 struct elf_link_hash_entry *tls_get_addr;
3318
3319 /* The bfd that forced an old-style PLT. */
3320 bfd *old_bfd;
3321
3322 /* TLS local dynamic got entry handling. */
3323 union {
3324 bfd_signed_vma refcount;
3325 bfd_vma offset;
3326 } tlsld_got;
3327
3328 /* Offset of branch table to PltResolve function in glink. */
3329 bfd_vma glink_pltresolve;
3330
3331 /* Size of reserved GOT entries. */
3332 unsigned int got_header_size;
3333 /* Non-zero if allocating the header left a gap. */
3334 unsigned int got_gap;
3335
3336 /* The type of PLT we have chosen to use. */
3337 enum ppc_elf_plt_type plt_type;
3338
3339 /* True if the target system is VxWorks. */
3340 unsigned int is_vxworks:1;
3341
3342 /* Whether there exist local gnu indirect function resolvers,
3343 referenced by dynamic relocations. */
3344 unsigned int local_ifunc_resolver:1;
3345 unsigned int maybe_local_ifunc_resolver:1;
3346
3347 /* Set if tls optimization is enabled. */
3348 unsigned int do_tls_opt:1;
3349
3350 /* Set if inline plt calls should be converted to direct calls. */
3351 unsigned int can_convert_all_inline_plt:1;
3352
3353 /* The size of PLT entries. */
3354 int plt_entry_size;
3355 /* The distance between adjacent PLT slots. */
3356 int plt_slot_size;
3357 /* The size of the first PLT entry. */
3358 int plt_initial_entry_size;
3359
3360 /* Small local sym cache. */
3361 struct sym_cache sym_cache;
3362 };
3363
3364 /* Rename some of the generic section flags to better document how they
3365 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3366
3367 /* Nonzero if this section has TLS related relocations. */
3368 #define has_tls_reloc sec_flg0
3369
3370 /* Nonzero if this section has a call to __tls_get_addr. */
3371 #define has_tls_get_addr_call sec_flg1
3372
3373 /* Flag set when PLTCALL relocs are detected. */
3374 #define has_pltcall sec_flg2
3375
3376 /* Get the PPC ELF linker hash table from a link_info structure. */
3377
3378 #define ppc_elf_hash_table(p) \
3379 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3380 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3381
3382 /* Create an entry in a PPC ELF linker hash table. */
3383
3384 static struct bfd_hash_entry *
3385 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3386 struct bfd_hash_table *table,
3387 const char *string)
3388 {
3389 /* Allocate the structure if it has not already been allocated by a
3390 subclass. */
3391 if (entry == NULL)
3392 {
3393 entry = bfd_hash_allocate (table,
3394 sizeof (struct ppc_elf_link_hash_entry));
3395 if (entry == NULL)
3396 return entry;
3397 }
3398
3399 /* Call the allocation method of the superclass. */
3400 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3401 if (entry != NULL)
3402 {
3403 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3404 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3405 ppc_elf_hash_entry (entry)->tls_mask = 0;
3406 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3407 }
3408
3409 return entry;
3410 }
3411
3412 /* Create a PPC ELF linker hash table. */
3413
3414 static struct bfd_link_hash_table *
3415 ppc_elf_link_hash_table_create (bfd *abfd)
3416 {
3417 struct ppc_elf_link_hash_table *ret;
3418 static struct ppc_elf_params default_params
3419 = { PLT_OLD, 0, 0, 1, 0, 0, 12, 0, 0, 0 };
3420
3421 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3422 if (ret == NULL)
3423 return NULL;
3424
3425 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3426 ppc_elf_link_hash_newfunc,
3427 sizeof (struct ppc_elf_link_hash_entry),
3428 PPC32_ELF_DATA))
3429 {
3430 free (ret);
3431 return NULL;
3432 }
3433
3434 ret->elf.init_plt_refcount.refcount = 0;
3435 ret->elf.init_plt_refcount.glist = NULL;
3436 ret->elf.init_plt_offset.offset = 0;
3437 ret->elf.init_plt_offset.glist = NULL;
3438
3439 ret->params = &default_params;
3440
3441 ret->sdata[0].name = ".sdata";
3442 ret->sdata[0].sym_name = "_SDA_BASE_";
3443 ret->sdata[0].bss_name = ".sbss";
3444
3445 ret->sdata[1].name = ".sdata2";
3446 ret->sdata[1].sym_name = "_SDA2_BASE_";
3447 ret->sdata[1].bss_name = ".sbss2";
3448
3449 ret->plt_entry_size = 12;
3450 ret->plt_slot_size = 8;
3451 ret->plt_initial_entry_size = 72;
3452
3453 return &ret->elf.root;
3454 }
3455
3456 /* Hook linker params into hash table. */
3457
3458 void
3459 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3460 {
3461 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3462
3463 if (htab)
3464 htab->params = params;
3465 params->pagesize_p2 = bfd_log2 (params->pagesize);
3466 }
3467
3468 /* Create .got and the related sections. */
3469
3470 static bfd_boolean
3471 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3472 {
3473 struct ppc_elf_link_hash_table *htab;
3474
3475 if (!_bfd_elf_create_got_section (abfd, info))
3476 return FALSE;
3477
3478 htab = ppc_elf_hash_table (info);
3479 if (!htab->is_vxworks)
3480 {
3481 /* The powerpc .got has a blrl instruction in it. Mark it
3482 executable. */
3483 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3484 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3485 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3486 return FALSE;
3487 }
3488
3489 return TRUE;
3490 }
3491
3492 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3493 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3494 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3495
3496 static bfd_boolean
3497 ppc_elf_create_linker_section (bfd *abfd,
3498 struct bfd_link_info *info,
3499 flagword flags,
3500 elf_linker_section_t *lsect)
3501 {
3502 asection *s;
3503
3504 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3505 | SEC_LINKER_CREATED);
3506
3507 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3508 if (s == NULL)
3509 return FALSE;
3510 lsect->section = s;
3511
3512 /* Define the sym on the first section of this name. */
3513 s = bfd_get_section_by_name (abfd, lsect->name);
3514
3515 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3516 if (lsect->sym == NULL)
3517 return FALSE;
3518 lsect->sym->root.u.def.value = 0x8000;
3519 return TRUE;
3520 }
3521
3522 static bfd_boolean
3523 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3524 {
3525 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3526 asection *s;
3527 flagword flags;
3528 int p2align;
3529
3530 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3531 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3532 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3533 htab->glink = s;
3534 p2align = htab->params->ppc476_workaround ? 6 : 4;
3535 if (p2align < htab->params->plt_stub_align)
3536 p2align = htab->params->plt_stub_align;
3537 if (s == NULL
3538 || !bfd_set_section_alignment (abfd, s, p2align))
3539 return FALSE;
3540
3541 if (!info->no_ld_generated_unwind_info)
3542 {
3543 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3544 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3545 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3546 htab->glink_eh_frame = s;
3547 if (s == NULL
3548 || !bfd_set_section_alignment (abfd, s, 2))
3549 return FALSE;
3550 }
3551
3552 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3553 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3554 htab->elf.iplt = s;
3555 if (s == NULL
3556 || !bfd_set_section_alignment (abfd, s, 4))
3557 return FALSE;
3558
3559 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3560 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3561 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3562 htab->elf.irelplt = s;
3563 if (s == NULL
3564 || ! bfd_set_section_alignment (abfd, s, 2))
3565 return FALSE;
3566
3567 /* Local plt entries. */
3568 flags = (SEC_ALLOC | SEC_LOAD
3569 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3570 htab->pltlocal = bfd_make_section_anyway_with_flags (abfd, ".branch_lt",
3571 flags);
3572 if (htab->pltlocal == NULL
3573 || ! bfd_set_section_alignment (abfd, htab->pltlocal, 2))
3574 return FALSE;
3575
3576 if (bfd_link_pic (info))
3577 {
3578 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3579 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3580 htab->relpltlocal
3581 = bfd_make_section_anyway_with_flags (abfd, ".rela.branch_lt", flags);
3582 if (htab->relpltlocal == NULL
3583 || ! bfd_set_section_alignment (abfd, htab->relpltlocal, 2))
3584 return FALSE;
3585 }
3586
3587 if (!ppc_elf_create_linker_section (abfd, info, 0,
3588 &htab->sdata[0]))
3589 return FALSE;
3590
3591 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3592 &htab->sdata[1]))
3593 return FALSE;
3594
3595 return TRUE;
3596 }
3597
3598 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3599 to output sections (just like _bfd_elf_create_dynamic_sections has
3600 to create .dynbss and .rela.bss). */
3601
3602 static bfd_boolean
3603 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3604 {
3605 struct ppc_elf_link_hash_table *htab;
3606 asection *s;
3607 flagword flags;
3608
3609 htab = ppc_elf_hash_table (info);
3610
3611 if (htab->elf.sgot == NULL
3612 && !ppc_elf_create_got (abfd, info))
3613 return FALSE;
3614
3615 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3616 return FALSE;
3617
3618 if (htab->glink == NULL
3619 && !ppc_elf_create_glink (abfd, info))
3620 return FALSE;
3621
3622 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3623 SEC_ALLOC | SEC_LINKER_CREATED);
3624 htab->dynsbss = s;
3625 if (s == NULL)
3626 return FALSE;
3627
3628 if (! bfd_link_pic (info))
3629 {
3630 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3631 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3632 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3633 htab->relsbss = s;
3634 if (s == NULL
3635 || ! bfd_set_section_alignment (abfd, s, 2))
3636 return FALSE;
3637 }
3638
3639 if (htab->is_vxworks
3640 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3641 return FALSE;
3642
3643 s = htab->elf.splt;
3644 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3645 if (htab->plt_type == PLT_VXWORKS)
3646 /* The VxWorks PLT is a loaded section with contents. */
3647 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3648 return bfd_set_section_flags (abfd, s, flags);
3649 }
3650
3651 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3652
3653 static void
3654 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3655 struct elf_link_hash_entry *dir,
3656 struct elf_link_hash_entry *ind)
3657 {
3658 struct ppc_elf_link_hash_entry *edir, *eind;
3659
3660 edir = (struct ppc_elf_link_hash_entry *) dir;
3661 eind = (struct ppc_elf_link_hash_entry *) ind;
3662
3663 edir->tls_mask |= eind->tls_mask;
3664 edir->has_sda_refs |= eind->has_sda_refs;
3665
3666 if (edir->elf.versioned != versioned_hidden)
3667 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3668 edir->elf.ref_regular |= eind->elf.ref_regular;
3669 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3670 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3671 edir->elf.needs_plt |= eind->elf.needs_plt;
3672 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3673
3674 /* If we were called to copy over info for a weak sym, that's all. */
3675 if (eind->elf.root.type != bfd_link_hash_indirect)
3676 return;
3677
3678 if (eind->dyn_relocs != NULL)
3679 {
3680 if (edir->dyn_relocs != NULL)
3681 {
3682 struct elf_dyn_relocs **pp;
3683 struct elf_dyn_relocs *p;
3684
3685 /* Add reloc counts against the indirect sym to the direct sym
3686 list. Merge any entries against the same section. */
3687 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3688 {
3689 struct elf_dyn_relocs *q;
3690
3691 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3692 if (q->sec == p->sec)
3693 {
3694 q->pc_count += p->pc_count;
3695 q->count += p->count;
3696 *pp = p->next;
3697 break;
3698 }
3699 if (q == NULL)
3700 pp = &p->next;
3701 }
3702 *pp = edir->dyn_relocs;
3703 }
3704
3705 edir->dyn_relocs = eind->dyn_relocs;
3706 eind->dyn_relocs = NULL;
3707 }
3708
3709 /* Copy over the GOT refcount entries that we may have already seen to
3710 the symbol which just became indirect. */
3711 edir->elf.got.refcount += eind->elf.got.refcount;
3712 eind->elf.got.refcount = 0;
3713
3714 /* And plt entries. */
3715 if (eind->elf.plt.plist != NULL)
3716 {
3717 if (edir->elf.plt.plist != NULL)
3718 {
3719 struct plt_entry **entp;
3720 struct plt_entry *ent;
3721
3722 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3723 {
3724 struct plt_entry *dent;
3725
3726 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3727 if (dent->sec == ent->sec && dent->addend == ent->addend)
3728 {
3729 dent->plt.refcount += ent->plt.refcount;
3730 *entp = ent->next;
3731 break;
3732 }
3733 if (dent == NULL)
3734 entp = &ent->next;
3735 }
3736 *entp = edir->elf.plt.plist;
3737 }
3738
3739 edir->elf.plt.plist = eind->elf.plt.plist;
3740 eind->elf.plt.plist = NULL;
3741 }
3742
3743 if (eind->elf.dynindx != -1)
3744 {
3745 if (edir->elf.dynindx != -1)
3746 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3747 edir->elf.dynstr_index);
3748 edir->elf.dynindx = eind->elf.dynindx;
3749 edir->elf.dynstr_index = eind->elf.dynstr_index;
3750 eind->elf.dynindx = -1;
3751 eind->elf.dynstr_index = 0;
3752 }
3753 }
3754
3755 /* Hook called by the linker routine which adds symbols from an object
3756 file. We use it to put .comm items in .sbss, and not .bss. */
3757
3758 static bfd_boolean
3759 ppc_elf_add_symbol_hook (bfd *abfd,
3760 struct bfd_link_info *info,
3761 Elf_Internal_Sym *sym,
3762 const char **namep ATTRIBUTE_UNUSED,
3763 flagword *flagsp ATTRIBUTE_UNUSED,
3764 asection **secp,
3765 bfd_vma *valp)
3766 {
3767 if (sym->st_shndx == SHN_COMMON
3768 && !bfd_link_relocatable (info)
3769 && is_ppc_elf (info->output_bfd)
3770 && sym->st_size <= elf_gp_size (abfd))
3771 {
3772 /* Common symbols less than or equal to -G nn bytes are automatically
3773 put into .sbss. */
3774 struct ppc_elf_link_hash_table *htab;
3775
3776 htab = ppc_elf_hash_table (info);
3777 if (htab->sbss == NULL)
3778 {
3779 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3780
3781 if (!htab->elf.dynobj)
3782 htab->elf.dynobj = abfd;
3783
3784 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3785 ".sbss",
3786 flags);
3787 if (htab->sbss == NULL)
3788 return FALSE;
3789 }
3790
3791 *secp = htab->sbss;
3792 *valp = sym->st_size;
3793 }
3794
3795 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3796 && (abfd->flags & DYNAMIC) == 0
3797 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3798 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3799
3800 return TRUE;
3801 }
3802 \f
3803 /* Find a linker generated pointer with a given addend and type. */
3804
3805 static elf_linker_section_pointers_t *
3806 elf_find_pointer_linker_section
3807 (elf_linker_section_pointers_t *linker_pointers,
3808 bfd_vma addend,
3809 elf_linker_section_t *lsect)
3810 {
3811 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3812 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3813 return linker_pointers;
3814
3815 return NULL;
3816 }
3817
3818 /* Allocate a pointer to live in a linker created section. */
3819
3820 static bfd_boolean
3821 elf_allocate_pointer_linker_section (bfd *abfd,
3822 elf_linker_section_t *lsect,
3823 struct elf_link_hash_entry *h,
3824 const Elf_Internal_Rela *rel)
3825 {
3826 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3827 elf_linker_section_pointers_t *linker_section_ptr;
3828 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3829 bfd_size_type amt;
3830
3831 BFD_ASSERT (lsect != NULL);
3832
3833 /* Is this a global symbol? */
3834 if (h != NULL)
3835 {
3836 struct ppc_elf_link_hash_entry *eh;
3837
3838 /* Has this symbol already been allocated? If so, our work is done. */
3839 eh = (struct ppc_elf_link_hash_entry *) h;
3840 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3841 rel->r_addend,
3842 lsect))
3843 return TRUE;
3844
3845 ptr_linker_section_ptr = &eh->linker_section_pointer;
3846 }
3847 else
3848 {
3849 BFD_ASSERT (is_ppc_elf (abfd));
3850
3851 /* Allocation of a pointer to a local symbol. */
3852 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3853
3854 /* Allocate a table to hold the local symbols if first time. */
3855 if (!ptr)
3856 {
3857 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3858
3859 amt = num_symbols;
3860 amt *= sizeof (elf_linker_section_pointers_t *);
3861 ptr = bfd_zalloc (abfd, amt);
3862
3863 if (!ptr)
3864 return FALSE;
3865
3866 elf_local_ptr_offsets (abfd) = ptr;
3867 }
3868
3869 /* Has this symbol already been allocated? If so, our work is done. */
3870 if (elf_find_pointer_linker_section (ptr[r_symndx],
3871 rel->r_addend,
3872 lsect))
3873 return TRUE;
3874
3875 ptr_linker_section_ptr = &ptr[r_symndx];
3876 }
3877
3878 /* Allocate space for a pointer in the linker section, and allocate
3879 a new pointer record from internal memory. */
3880 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3881 amt = sizeof (elf_linker_section_pointers_t);
3882 linker_section_ptr = bfd_alloc (abfd, amt);
3883
3884 if (!linker_section_ptr)
3885 return FALSE;
3886
3887 linker_section_ptr->next = *ptr_linker_section_ptr;
3888 linker_section_ptr->addend = rel->r_addend;
3889 linker_section_ptr->lsect = lsect;
3890 *ptr_linker_section_ptr = linker_section_ptr;
3891
3892 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3893 return FALSE;
3894 linker_section_ptr->offset = lsect->section->size;
3895 lsect->section->size += 4;
3896
3897 #ifdef DEBUG
3898 fprintf (stderr,
3899 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3900 lsect->name, (long) linker_section_ptr->offset,
3901 (long) lsect->section->size);
3902 #endif
3903
3904 return TRUE;
3905 }
3906
3907 static struct plt_entry **
3908 update_local_sym_info (bfd *abfd,
3909 Elf_Internal_Shdr *symtab_hdr,
3910 unsigned long r_symndx,
3911 int tls_type)
3912 {
3913 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3914 struct plt_entry **local_plt;
3915 unsigned char *local_got_tls_masks;
3916
3917 if (local_got_refcounts == NULL)
3918 {
3919 bfd_size_type size = symtab_hdr->sh_info;
3920
3921 size *= (sizeof (*local_got_refcounts)
3922 + sizeof (*local_plt)
3923 + sizeof (*local_got_tls_masks));
3924 local_got_refcounts = bfd_zalloc (abfd, size);
3925 if (local_got_refcounts == NULL)
3926 return NULL;
3927 elf_local_got_refcounts (abfd) = local_got_refcounts;
3928 }
3929
3930 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3931 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
3932 local_got_tls_masks[r_symndx] |= tls_type & 0xff;
3933 if ((tls_type & NON_GOT) == 0)
3934 local_got_refcounts[r_symndx] += 1;
3935 return local_plt + r_symndx;
3936 }
3937
3938 static bfd_boolean
3939 update_plt_info (bfd *abfd, struct plt_entry **plist,
3940 asection *sec, bfd_vma addend)
3941 {
3942 struct plt_entry *ent;
3943
3944 if (addend < 32768)
3945 sec = NULL;
3946 for (ent = *plist; ent != NULL; ent = ent->next)
3947 if (ent->sec == sec && ent->addend == addend)
3948 break;
3949 if (ent == NULL)
3950 {
3951 bfd_size_type amt = sizeof (*ent);
3952 ent = bfd_alloc (abfd, amt);
3953 if (ent == NULL)
3954 return FALSE;
3955 ent->next = *plist;
3956 ent->sec = sec;
3957 ent->addend = addend;
3958 ent->plt.refcount = 0;
3959 *plist = ent;
3960 }
3961 ent->plt.refcount += 1;
3962 return TRUE;
3963 }
3964
3965 static struct plt_entry *
3966 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3967 {
3968 struct plt_entry *ent;
3969
3970 if (addend < 32768)
3971 sec = NULL;
3972 for (ent = *plist; ent != NULL; ent = ent->next)
3973 if (ent->sec == sec && ent->addend == addend)
3974 break;
3975 return ent;
3976 }
3977
3978 static bfd_boolean
3979 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3980 {
3981 return (r_type == R_PPC_PLTREL24
3982 || r_type == R_PPC_LOCAL24PC
3983 || r_type == R_PPC_REL24
3984 || r_type == R_PPC_REL14
3985 || r_type == R_PPC_REL14_BRTAKEN
3986 || r_type == R_PPC_REL14_BRNTAKEN
3987 || r_type == R_PPC_ADDR24
3988 || r_type == R_PPC_ADDR14
3989 || r_type == R_PPC_ADDR14_BRTAKEN
3990 || r_type == R_PPC_ADDR14_BRNTAKEN
3991 || r_type == R_PPC_VLE_REL24);
3992 }
3993
3994 /* Relocs on inline plt call sequence insns prior to the call. */
3995
3996 static bfd_boolean
3997 is_plt_seq_reloc (enum elf_ppc_reloc_type r_type)
3998 {
3999 return (r_type == R_PPC_PLT16_HA
4000 || r_type == R_PPC_PLT16_HI
4001 || r_type == R_PPC_PLT16_LO
4002 || r_type == R_PPC_PLTSEQ);
4003 }
4004
4005 static void
4006 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
4007 {
4008 _bfd_error_handler
4009 /* xgettext:c-format */
4010 (_("%pB: relocation %s cannot be used when making a shared object"),
4011 abfd,
4012 ppc_elf_howto_table[r_type]->name);
4013 bfd_set_error (bfd_error_bad_value);
4014 }
4015
4016 /* Look through the relocs for a section during the first phase, and
4017 allocate space in the global offset table or procedure linkage
4018 table. */
4019
4020 static bfd_boolean
4021 ppc_elf_check_relocs (bfd *abfd,
4022 struct bfd_link_info *info,
4023 asection *sec,
4024 const Elf_Internal_Rela *relocs)
4025 {
4026 struct ppc_elf_link_hash_table *htab;
4027 Elf_Internal_Shdr *symtab_hdr;
4028 struct elf_link_hash_entry **sym_hashes;
4029 const Elf_Internal_Rela *rel;
4030 const Elf_Internal_Rela *rel_end;
4031 asection *got2, *sreloc;
4032 struct elf_link_hash_entry *tga;
4033
4034 if (bfd_link_relocatable (info))
4035 return TRUE;
4036
4037 /* Don't do anything special with non-loaded, non-alloced sections.
4038 In particular, any relocs in such sections should not affect GOT
4039 and PLT reference counting (ie. we don't allow them to create GOT
4040 or PLT entries), there's no possibility or desire to optimize TLS
4041 relocs, and there's not much point in propagating relocs to shared
4042 libs that the dynamic linker won't relocate. */
4043 if ((sec->flags & SEC_ALLOC) == 0)
4044 return TRUE;
4045
4046 #ifdef DEBUG
4047 _bfd_error_handler ("ppc_elf_check_relocs called for section %pA in %pB",
4048 sec, abfd);
4049 #endif
4050
4051 BFD_ASSERT (is_ppc_elf (abfd));
4052
4053 /* Initialize howto table if not already done. */
4054 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4055 ppc_elf_howto_init ();
4056
4057 htab = ppc_elf_hash_table (info);
4058 if (htab->glink == NULL)
4059 {
4060 if (htab->elf.dynobj == NULL)
4061 htab->elf.dynobj = abfd;
4062 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4063 return FALSE;
4064 }
4065 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4066 FALSE, FALSE, TRUE);
4067 symtab_hdr = &elf_symtab_hdr (abfd);
4068 sym_hashes = elf_sym_hashes (abfd);
4069 got2 = bfd_get_section_by_name (abfd, ".got2");
4070 sreloc = NULL;
4071
4072 rel_end = relocs + sec->reloc_count;
4073 for (rel = relocs; rel < rel_end; rel++)
4074 {
4075 unsigned long r_symndx;
4076 enum elf_ppc_reloc_type r_type;
4077 struct elf_link_hash_entry *h;
4078 int tls_type;
4079 struct plt_entry **ifunc;
4080 struct plt_entry **pltent;
4081 bfd_vma addend;
4082
4083 r_symndx = ELF32_R_SYM (rel->r_info);
4084 if (r_symndx < symtab_hdr->sh_info)
4085 h = NULL;
4086 else
4087 {
4088 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4089 while (h->root.type == bfd_link_hash_indirect
4090 || h->root.type == bfd_link_hash_warning)
4091 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4092 }
4093
4094 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4095 This shows up in particular in an R_PPC_ADDR32 in the eabi
4096 startup code. */
4097 if (h != NULL
4098 && htab->elf.sgot == NULL
4099 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4100 {
4101 if (htab->elf.dynobj == NULL)
4102 htab->elf.dynobj = abfd;
4103 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4104 return FALSE;
4105 BFD_ASSERT (h == htab->elf.hgot);
4106 }
4107
4108 tls_type = 0;
4109 r_type = ELF32_R_TYPE (rel->r_info);
4110 ifunc = NULL;
4111 if (h == NULL && !htab->is_vxworks)
4112 {
4113 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4114 abfd, r_symndx);
4115 if (isym == NULL)
4116 return FALSE;
4117
4118 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4119 {
4120 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4121 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4122 NON_GOT | PLT_IFUNC);
4123 if (ifunc == NULL)
4124 return FALSE;
4125
4126 /* STT_GNU_IFUNC symbols must have a PLT entry;
4127 In a non-pie executable even when there are
4128 no plt calls. */
4129 if (!bfd_link_pic (info)
4130 || is_branch_reloc (r_type)
4131 || r_type == R_PPC_PLT16_LO
4132 || r_type == R_PPC_PLT16_HI
4133 || r_type == R_PPC_PLT16_HA)
4134 {
4135 addend = 0;
4136 if (r_type == R_PPC_PLTREL24)
4137 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4138 if (bfd_link_pic (info)
4139 && (r_type == R_PPC_PLTREL24
4140 || r_type == R_PPC_PLT16_LO
4141 || r_type == R_PPC_PLT16_HI
4142 || r_type == R_PPC_PLT16_HA))
4143 addend = rel->r_addend;
4144 if (!update_plt_info (abfd, ifunc, got2, addend))
4145 return FALSE;
4146 }
4147 }
4148 }
4149
4150 if (!htab->is_vxworks
4151 && is_branch_reloc (r_type)
4152 && h != NULL
4153 && h == tga)
4154 {
4155 if (rel != relocs
4156 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4157 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4158 /* We have a new-style __tls_get_addr call with a marker
4159 reloc. */
4160 ;
4161 else
4162 /* Mark this section as having an old-style call. */
4163 sec->has_tls_get_addr_call = 1;
4164 }
4165
4166 switch (r_type)
4167 {
4168 case R_PPC_TLSGD:
4169 case R_PPC_TLSLD:
4170 /* These special tls relocs tie a call to __tls_get_addr with
4171 its parameter symbol. */
4172 if (h != NULL)
4173 ppc_elf_hash_entry (h)->tls_mask |= TLS_TLS | TLS_MARK;
4174 else
4175 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4176 NON_GOT | TLS_TLS | TLS_MARK))
4177 return FALSE;
4178 break;
4179
4180 case R_PPC_PLTSEQ:
4181 break;
4182
4183 case R_PPC_GOT_TLSLD16:
4184 case R_PPC_GOT_TLSLD16_LO:
4185 case R_PPC_GOT_TLSLD16_HI:
4186 case R_PPC_GOT_TLSLD16_HA:
4187 tls_type = TLS_TLS | TLS_LD;
4188 goto dogottls;
4189
4190 case R_PPC_GOT_TLSGD16:
4191 case R_PPC_GOT_TLSGD16_LO:
4192 case R_PPC_GOT_TLSGD16_HI:
4193 case R_PPC_GOT_TLSGD16_HA:
4194 tls_type = TLS_TLS | TLS_GD;
4195 goto dogottls;
4196
4197 case R_PPC_GOT_TPREL16:
4198 case R_PPC_GOT_TPREL16_LO:
4199 case R_PPC_GOT_TPREL16_HI:
4200 case R_PPC_GOT_TPREL16_HA:
4201 if (bfd_link_dll (info))
4202 info->flags |= DF_STATIC_TLS;
4203 tls_type = TLS_TLS | TLS_TPREL;
4204 goto dogottls;
4205
4206 case R_PPC_GOT_DTPREL16:
4207 case R_PPC_GOT_DTPREL16_LO:
4208 case R_PPC_GOT_DTPREL16_HI:
4209 case R_PPC_GOT_DTPREL16_HA:
4210 tls_type = TLS_TLS | TLS_DTPREL;
4211 dogottls:
4212 sec->has_tls_reloc = 1;
4213 /* Fall through. */
4214
4215 /* GOT16 relocations */
4216 case R_PPC_GOT16:
4217 case R_PPC_GOT16_LO:
4218 case R_PPC_GOT16_HI:
4219 case R_PPC_GOT16_HA:
4220 /* This symbol requires a global offset table entry. */
4221 if (htab->elf.sgot == NULL)
4222 {
4223 if (htab->elf.dynobj == NULL)
4224 htab->elf.dynobj = abfd;
4225 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4226 return FALSE;
4227 }
4228 if (h != NULL)
4229 {
4230 h->got.refcount += 1;
4231 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4232 }
4233 else
4234 /* This is a global offset table entry for a local symbol. */
4235 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4236 return FALSE;
4237
4238 /* We may also need a plt entry if the symbol turns out to be
4239 an ifunc. */
4240 if (h != NULL && !bfd_link_pic (info))
4241 {
4242 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4243 return FALSE;
4244 }
4245 break;
4246
4247 /* Indirect .sdata relocation. */
4248 case R_PPC_EMB_SDAI16:
4249 if (bfd_link_pic (info))
4250 {
4251 bad_shared_reloc (abfd, r_type);
4252 return FALSE;
4253 }
4254 htab->sdata[0].sym->ref_regular = 1;
4255 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4256 h, rel))
4257 return FALSE;
4258 if (h != NULL)
4259 {
4260 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4261 h->non_got_ref = TRUE;
4262 }
4263 break;
4264
4265 /* Indirect .sdata2 relocation. */
4266 case R_PPC_EMB_SDA2I16:
4267 if (bfd_link_pic (info))
4268 {
4269 bad_shared_reloc (abfd, r_type);
4270 return FALSE;
4271 }
4272 htab->sdata[1].sym->ref_regular = 1;
4273 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4274 h, rel))
4275 return FALSE;
4276 if (h != NULL)
4277 {
4278 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4279 h->non_got_ref = TRUE;
4280 }
4281 break;
4282
4283 case R_PPC_SDAREL16:
4284 htab->sdata[0].sym->ref_regular = 1;
4285 /* Fall through. */
4286
4287 case R_PPC_VLE_SDAREL_LO16A:
4288 case R_PPC_VLE_SDAREL_LO16D:
4289 case R_PPC_VLE_SDAREL_HI16A:
4290 case R_PPC_VLE_SDAREL_HI16D:
4291 case R_PPC_VLE_SDAREL_HA16A:
4292 case R_PPC_VLE_SDAREL_HA16D:
4293 if (h != NULL)
4294 {
4295 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4296 h->non_got_ref = TRUE;
4297 }
4298 break;
4299
4300 case R_PPC_VLE_REL8:
4301 case R_PPC_VLE_REL15:
4302 case R_PPC_VLE_REL24:
4303 case R_PPC_VLE_LO16A:
4304 case R_PPC_VLE_LO16D:
4305 case R_PPC_VLE_HI16A:
4306 case R_PPC_VLE_HI16D:
4307 case R_PPC_VLE_HA16A:
4308 case R_PPC_VLE_HA16D:
4309 case R_PPC_VLE_ADDR20:
4310 break;
4311
4312 case R_PPC_EMB_SDA2REL:
4313 if (bfd_link_pic (info))
4314 {
4315 bad_shared_reloc (abfd, r_type);
4316 return FALSE;
4317 }
4318 htab->sdata[1].sym->ref_regular = 1;
4319 if (h != NULL)
4320 {
4321 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4322 h->non_got_ref = TRUE;
4323 }
4324 break;
4325
4326 case R_PPC_VLE_SDA21_LO:
4327 case R_PPC_VLE_SDA21:
4328 case R_PPC_EMB_SDA21:
4329 case R_PPC_EMB_RELSDA:
4330 if (bfd_link_pic (info))
4331 {
4332 bad_shared_reloc (abfd, r_type);
4333 return FALSE;
4334 }
4335 if (h != NULL)
4336 {
4337 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4338 h->non_got_ref = TRUE;
4339 }
4340 break;
4341
4342 case R_PPC_EMB_NADDR32:
4343 case R_PPC_EMB_NADDR16:
4344 case R_PPC_EMB_NADDR16_LO:
4345 case R_PPC_EMB_NADDR16_HI:
4346 case R_PPC_EMB_NADDR16_HA:
4347 if (bfd_link_pic (info))
4348 {
4349 bad_shared_reloc (abfd, r_type);
4350 return FALSE;
4351 }
4352 if (h != NULL)
4353 h->non_got_ref = TRUE;
4354 break;
4355
4356 case R_PPC_PLTREL24:
4357 if (h == NULL)
4358 break;
4359 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4360 goto pltentry;
4361
4362 case R_PPC_PLTCALL:
4363 sec->has_pltcall = 1;
4364 /* Fall through. */
4365
4366 case R_PPC_PLT32:
4367 case R_PPC_PLTREL32:
4368 case R_PPC_PLT16_LO:
4369 case R_PPC_PLT16_HI:
4370 case R_PPC_PLT16_HA:
4371 pltentry:
4372 #ifdef DEBUG
4373 fprintf (stderr, "Reloc requires a PLT entry\n");
4374 #endif
4375 /* This symbol requires a procedure linkage table entry. */
4376 if (h == NULL)
4377 {
4378 pltent = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4379 NON_GOT | PLT_KEEP);
4380 if (pltent == NULL)
4381 return FALSE;
4382 }
4383 else
4384 {
4385 if (r_type != R_PPC_PLTREL24)
4386 ppc_elf_hash_entry (h)->tls_mask |= PLT_KEEP;
4387 h->needs_plt = 1;
4388 pltent = &h->plt.plist;
4389 }
4390 addend = 0;
4391 if (bfd_link_pic (info)
4392 && (r_type == R_PPC_PLTREL24
4393 || r_type == R_PPC_PLT16_LO
4394 || r_type == R_PPC_PLT16_HI
4395 || r_type == R_PPC_PLT16_HA))
4396 addend = rel->r_addend;
4397 if (!update_plt_info (abfd, pltent, got2, addend))
4398 return FALSE;
4399 break;
4400
4401 /* The following relocations don't need to propagate the
4402 relocation if linking a shared object since they are
4403 section relative. */
4404 case R_PPC_SECTOFF:
4405 case R_PPC_SECTOFF_LO:
4406 case R_PPC_SECTOFF_HI:
4407 case R_PPC_SECTOFF_HA:
4408 case R_PPC_DTPREL16:
4409 case R_PPC_DTPREL16_LO:
4410 case R_PPC_DTPREL16_HI:
4411 case R_PPC_DTPREL16_HA:
4412 case R_PPC_TOC16:
4413 break;
4414
4415 case R_PPC_REL16:
4416 case R_PPC_REL16_LO:
4417 case R_PPC_REL16_HI:
4418 case R_PPC_REL16_HA:
4419 case R_PPC_REL16DX_HA:
4420 ppc_elf_tdata (abfd)->has_rel16 = 1;
4421 break;
4422
4423 /* These are just markers. */
4424 case R_PPC_TLS:
4425 case R_PPC_EMB_MRKREF:
4426 case R_PPC_NONE:
4427 case R_PPC_max:
4428 case R_PPC_RELAX:
4429 case R_PPC_RELAX_PLT:
4430 case R_PPC_RELAX_PLTREL24:
4431 case R_PPC_16DX_HA:
4432 break;
4433
4434 /* These should only appear in dynamic objects. */
4435 case R_PPC_COPY:
4436 case R_PPC_GLOB_DAT:
4437 case R_PPC_JMP_SLOT:
4438 case R_PPC_RELATIVE:
4439 case R_PPC_IRELATIVE:
4440 break;
4441
4442 /* These aren't handled yet. We'll report an error later. */
4443 case R_PPC_ADDR30:
4444 case R_PPC_EMB_RELSEC16:
4445 case R_PPC_EMB_RELST_LO:
4446 case R_PPC_EMB_RELST_HI:
4447 case R_PPC_EMB_RELST_HA:
4448 case R_PPC_EMB_BIT_FLD:
4449 break;
4450
4451 /* This refers only to functions defined in the shared library. */
4452 case R_PPC_LOCAL24PC:
4453 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4454 {
4455 htab->plt_type = PLT_OLD;
4456 htab->old_bfd = abfd;
4457 }
4458 if (h != NULL && h->type == STT_GNU_IFUNC)
4459 {
4460 h->needs_plt = 1;
4461 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4462 return FALSE;
4463 }
4464 break;
4465
4466 /* This relocation describes the C++ object vtable hierarchy.
4467 Reconstruct it for later use during GC. */
4468 case R_PPC_GNU_VTINHERIT:
4469 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4470 return FALSE;
4471 break;
4472
4473 /* This relocation describes which C++ vtable entries are actually
4474 used. Record for later use during GC. */
4475 case R_PPC_GNU_VTENTRY:
4476 BFD_ASSERT (h != NULL);
4477 if (h != NULL
4478 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4479 return FALSE;
4480 break;
4481
4482 /* We shouldn't really be seeing TPREL32. */
4483 case R_PPC_TPREL32:
4484 case R_PPC_TPREL16:
4485 case R_PPC_TPREL16_LO:
4486 case R_PPC_TPREL16_HI:
4487 case R_PPC_TPREL16_HA:
4488 if (bfd_link_dll (info))
4489 info->flags |= DF_STATIC_TLS;
4490 goto dodyn;
4491
4492 /* Nor these. */
4493 case R_PPC_DTPMOD32:
4494 case R_PPC_DTPREL32:
4495 goto dodyn;
4496
4497 case R_PPC_REL32:
4498 if (h == NULL
4499 && got2 != NULL
4500 && (sec->flags & SEC_CODE) != 0
4501 && bfd_link_pic (info)
4502 && htab->plt_type == PLT_UNSET)
4503 {
4504 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4505 the start of a function, which assembles to a REL32
4506 reference to .got2. If we detect one of these, then
4507 force the old PLT layout because the linker cannot
4508 reliably deduce the GOT pointer value needed for
4509 PLT call stubs. */
4510 asection *s;
4511 Elf_Internal_Sym *isym;
4512
4513 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4514 abfd, r_symndx);
4515 if (isym == NULL)
4516 return FALSE;
4517
4518 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4519 if (s == got2)
4520 {
4521 htab->plt_type = PLT_OLD;
4522 htab->old_bfd = abfd;
4523 }
4524 }
4525 if (h == NULL || h == htab->elf.hgot)
4526 break;
4527 /* fall through */
4528
4529 case R_PPC_ADDR32:
4530 case R_PPC_ADDR16:
4531 case R_PPC_ADDR16_LO:
4532 case R_PPC_ADDR16_HI:
4533 case R_PPC_ADDR16_HA:
4534 case R_PPC_UADDR32:
4535 case R_PPC_UADDR16:
4536 if (h != NULL && !bfd_link_pic (info))
4537 {
4538 /* We may need a plt entry if the symbol turns out to be
4539 a function defined in a dynamic object. */
4540 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4541 return FALSE;
4542
4543 /* We may need a copy reloc too. */
4544 h->non_got_ref = 1;
4545 h->pointer_equality_needed = 1;
4546 if (r_type == R_PPC_ADDR16_HA)
4547 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4548 if (r_type == R_PPC_ADDR16_LO)
4549 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4550 }
4551 goto dodyn;
4552
4553 case R_PPC_REL24:
4554 case R_PPC_REL14:
4555 case R_PPC_REL14_BRTAKEN:
4556 case R_PPC_REL14_BRNTAKEN:
4557 if (h == NULL)
4558 break;
4559 if (h == htab->elf.hgot)
4560 {
4561 if (htab->plt_type == PLT_UNSET)
4562 {
4563 htab->plt_type = PLT_OLD;
4564 htab->old_bfd = abfd;
4565 }
4566 break;
4567 }
4568 /* fall through */
4569
4570 case R_PPC_ADDR24:
4571 case R_PPC_ADDR14:
4572 case R_PPC_ADDR14_BRTAKEN:
4573 case R_PPC_ADDR14_BRNTAKEN:
4574 if (h != NULL && !bfd_link_pic (info))
4575 {
4576 /* We may need a plt entry if the symbol turns out to be
4577 a function defined in a dynamic object. */
4578 h->needs_plt = 1;
4579 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4580 return FALSE;
4581 break;
4582 }
4583
4584 dodyn:
4585 /* If we are creating a shared library, and this is a reloc
4586 against a global symbol, or a non PC relative reloc
4587 against a local symbol, then we need to copy the reloc
4588 into the shared library. However, if we are linking with
4589 -Bsymbolic, we do not need to copy a reloc against a
4590 global symbol which is defined in an object we are
4591 including in the link (i.e., DEF_REGULAR is set). At
4592 this point we have not seen all the input files, so it is
4593 possible that DEF_REGULAR is not set now but will be set
4594 later (it is never cleared). In case of a weak definition,
4595 DEF_REGULAR may be cleared later by a strong definition in
4596 a shared library. We account for that possibility below by
4597 storing information in the dyn_relocs field of the hash
4598 table entry. A similar situation occurs when creating
4599 shared libraries and symbol visibility changes render the
4600 symbol local.
4601
4602 If on the other hand, we are creating an executable, we
4603 may need to keep relocations for symbols satisfied by a
4604 dynamic library if we manage to avoid copy relocs for the
4605 symbol. */
4606 if ((bfd_link_pic (info)
4607 && (must_be_dyn_reloc (info, r_type)
4608 || (h != NULL
4609 && (!SYMBOLIC_BIND (info, h)
4610 || h->root.type == bfd_link_hash_defweak
4611 || !h->def_regular))))
4612 || (ELIMINATE_COPY_RELOCS
4613 && !bfd_link_pic (info)
4614 && h != NULL
4615 && (h->root.type == bfd_link_hash_defweak
4616 || !h->def_regular)))
4617 {
4618 #ifdef DEBUG
4619 fprintf (stderr,
4620 "ppc_elf_check_relocs needs to "
4621 "create relocation for %s\n",
4622 (h && h->root.root.string
4623 ? h->root.root.string : "<unknown>"));
4624 #endif
4625 if (sreloc == NULL)
4626 {
4627 if (htab->elf.dynobj == NULL)
4628 htab->elf.dynobj = abfd;
4629
4630 sreloc = _bfd_elf_make_dynamic_reloc_section
4631 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4632
4633 if (sreloc == NULL)
4634 return FALSE;
4635 }
4636
4637 /* If this is a global symbol, we count the number of
4638 relocations we need for this symbol. */
4639 if (h != NULL)
4640 {
4641 struct elf_dyn_relocs *p;
4642 struct elf_dyn_relocs **rel_head;
4643
4644 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4645 p = *rel_head;
4646 if (p == NULL || p->sec != sec)
4647 {
4648 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4649 if (p == NULL)
4650 return FALSE;
4651 p->next = *rel_head;
4652 *rel_head = p;
4653 p->sec = sec;
4654 p->count = 0;
4655 p->pc_count = 0;
4656 }
4657 p->count += 1;
4658 if (!must_be_dyn_reloc (info, r_type))
4659 p->pc_count += 1;
4660 }
4661 else
4662 {
4663 /* Track dynamic relocs needed for local syms too.
4664 We really need local syms available to do this
4665 easily. Oh well. */
4666 struct ppc_dyn_relocs *p;
4667 struct ppc_dyn_relocs **rel_head;
4668 bfd_boolean is_ifunc;
4669 asection *s;
4670 void *vpp;
4671 Elf_Internal_Sym *isym;
4672
4673 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4674 abfd, r_symndx);
4675 if (isym == NULL)
4676 return FALSE;
4677
4678 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4679 if (s == NULL)
4680 s = sec;
4681
4682 vpp = &elf_section_data (s)->local_dynrel;
4683 rel_head = (struct ppc_dyn_relocs **) vpp;
4684 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4685 p = *rel_head;
4686 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4687 p = p->next;
4688 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4689 {
4690 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4691 if (p == NULL)
4692 return FALSE;
4693 p->next = *rel_head;
4694 *rel_head = p;
4695 p->sec = sec;
4696 p->ifunc = is_ifunc;
4697 p->count = 0;
4698 }
4699 p->count += 1;
4700 }
4701 }
4702
4703 break;
4704 }
4705 }
4706
4707 return TRUE;
4708 }
4709 \f
4710 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4711 and OBFD, and merge non-conflicting ones. */
4712 void
4713 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4714 {
4715 bfd *obfd = info->output_bfd;
4716 obj_attribute *in_attr, *in_attrs;
4717 obj_attribute *out_attr, *out_attrs;
4718
4719 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4720 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4721
4722 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4723 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4724
4725 if (in_attr->i != out_attr->i)
4726 {
4727 int in_fp = in_attr->i & 3;
4728 int out_fp = out_attr->i & 3;
4729
4730 if (in_fp == 0)
4731 ;
4732 else if (out_fp == 0)
4733 {
4734 out_attr->type = 1;
4735 out_attr->i ^= in_fp;
4736 }
4737 else if (out_fp != 2 && in_fp == 2)
4738 _bfd_error_handler
4739 /* xgettext:c-format */
4740 (_("warning: %pB uses hard float, %pB uses soft float"), obfd, ibfd);
4741 else if (out_fp == 2 && in_fp != 2)
4742 _bfd_error_handler
4743 /* xgettext:c-format */
4744 (_("warning: %pB uses hard float, %pB uses soft float"), ibfd, obfd);
4745 else if (out_fp == 1 && in_fp == 3)
4746 _bfd_error_handler
4747 /* xgettext:c-format */
4748 (_("warning: %pB uses double-precision hard float, "
4749 "%pB uses single-precision hard float"), obfd, ibfd);
4750 else if (out_fp == 3 && in_fp == 1)
4751 _bfd_error_handler
4752 /* xgettext:c-format */
4753 (_("warning: %pB uses double-precision hard float, "
4754 "%pB uses single-precision hard float"), ibfd, obfd);
4755
4756 in_fp = in_attr->i & 0xc;
4757 out_fp = out_attr->i & 0xc;
4758 if (in_fp == 0)
4759 ;
4760 else if (out_fp == 0)
4761 {
4762 out_attr->type = 1;
4763 out_attr->i ^= in_fp;
4764 }
4765 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4766 _bfd_error_handler
4767 /* xgettext:c-format */
4768 (_("warning: %pB uses 64-bit long double, "
4769 "%pB uses 128-bit long double"), ibfd, obfd);
4770 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4771 _bfd_error_handler
4772 /* xgettext:c-format */
4773 (_("warning: %pB uses 64-bit long double, "
4774 "%pB uses 128-bit long double"), obfd, ibfd);
4775 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4776 _bfd_error_handler
4777 /* xgettext:c-format */
4778 (_("warning: %pB uses IBM long double, "
4779 "%pB uses IEEE long double"), obfd, ibfd);
4780 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4781 _bfd_error_handler
4782 /* xgettext:c-format */
4783 (_("warning: %pB uses IBM long double, "
4784 "%pB uses IEEE long double"), ibfd, obfd);
4785 }
4786 }
4787
4788 /* Merge object attributes from IBFD into OBFD. Warn if
4789 there are conflicting attributes. */
4790 static bfd_boolean
4791 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4792 {
4793 bfd *obfd;
4794 obj_attribute *in_attr, *in_attrs;
4795 obj_attribute *out_attr, *out_attrs;
4796
4797 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4798
4799 obfd = info->output_bfd;
4800 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4801 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4802
4803 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4804 merge non-conflicting ones. */
4805 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4806 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4807 if (in_attr->i != out_attr->i)
4808 {
4809 int in_vec = in_attr->i & 3;
4810 int out_vec = out_attr->i & 3;
4811
4812 if (in_vec == 0)
4813 ;
4814 else if (out_vec == 0)
4815 {
4816 out_attr->type = 1;
4817 out_attr->i = in_vec;
4818 }
4819 /* For now, allow generic to transition to AltiVec or SPE
4820 without a warning. If GCC marked files with their stack
4821 alignment and used don't-care markings for files which are
4822 not affected by the vector ABI, we could warn about this
4823 case too. */
4824 else if (in_vec == 1)
4825 ;
4826 else if (out_vec == 1)
4827 {
4828 out_attr->type = 1;
4829 out_attr->i = in_vec;
4830 }
4831 else if (out_vec < in_vec)
4832 _bfd_error_handler
4833 /* xgettext:c-format */
4834 (_("warning: %pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
4835 obfd, ibfd);
4836 else if (out_vec > in_vec)
4837 _bfd_error_handler
4838 /* xgettext:c-format */
4839 (_("warning: %pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
4840 ibfd, obfd);
4841 }
4842
4843 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4844 and merge non-conflicting ones. */
4845 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4846 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4847 if (in_attr->i != out_attr->i)
4848 {
4849 int in_struct = in_attr->i & 3;
4850 int out_struct = out_attr->i & 3;
4851
4852 if (in_struct == 0 || in_struct == 3)
4853 ;
4854 else if (out_struct == 0)
4855 {
4856 out_attr->type = 1;
4857 out_attr->i = in_struct;
4858 }
4859 else if (out_struct < in_struct)
4860 _bfd_error_handler
4861 /* xgettext:c-format */
4862 (_("warning: %pB uses r3/r4 for small structure returns, "
4863 "%pB uses memory"), obfd, ibfd);
4864 else if (out_struct > in_struct)
4865 _bfd_error_handler
4866 /* xgettext:c-format */
4867 (_("warning: %pB uses r3/r4 for small structure returns, "
4868 "%pB uses memory"), ibfd, obfd);
4869 }
4870
4871 /* Merge Tag_compatibility attributes and any common GNU ones. */
4872 _bfd_elf_merge_object_attributes (ibfd, info);
4873
4874 return TRUE;
4875 }
4876
4877 /* Merge backend specific data from an object file to the output
4878 object file when linking. */
4879
4880 static bfd_boolean
4881 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4882 {
4883 bfd *obfd = info->output_bfd;
4884 flagword old_flags;
4885 flagword new_flags;
4886 bfd_boolean error;
4887
4888 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4889 return TRUE;
4890
4891 /* Check if we have the same endianness. */
4892 if (! _bfd_generic_verify_endian_match (ibfd, info))
4893 return FALSE;
4894
4895 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4896 return FALSE;
4897
4898 new_flags = elf_elfheader (ibfd)->e_flags;
4899 old_flags = elf_elfheader (obfd)->e_flags;
4900 if (!elf_flags_init (obfd))
4901 {
4902 /* First call, no flags set. */
4903 elf_flags_init (obfd) = TRUE;
4904 elf_elfheader (obfd)->e_flags = new_flags;
4905 }
4906
4907 /* Compatible flags are ok. */
4908 else if (new_flags == old_flags)
4909 ;
4910
4911 /* Incompatible flags. */
4912 else
4913 {
4914 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4915 to be linked with either. */
4916 error = FALSE;
4917 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4918 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4919 {
4920 error = TRUE;
4921 _bfd_error_handler
4922 (_("%pB: compiled with -mrelocatable and linked with "
4923 "modules compiled normally"), ibfd);
4924 }
4925 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4926 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4927 {
4928 error = TRUE;
4929 _bfd_error_handler
4930 (_("%pB: compiled normally and linked with "
4931 "modules compiled with -mrelocatable"), ibfd);
4932 }
4933
4934 /* The output is -mrelocatable-lib iff both the input files are. */
4935 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4936 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4937
4938 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4939 but each input file is either -mrelocatable or -mrelocatable-lib. */
4940 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4941 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4942 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4943 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4944
4945 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4946 any module uses it. */
4947 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4948
4949 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4950 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4951
4952 /* Warn about any other mismatches. */
4953 if (new_flags != old_flags)
4954 {
4955 error = TRUE;
4956 _bfd_error_handler
4957 /* xgettext:c-format */
4958 (_("%pB: uses different e_flags (%#x) fields "
4959 "than previous modules (%#x)"),
4960 ibfd, new_flags, old_flags);
4961 }
4962
4963 if (error)
4964 {
4965 bfd_set_error (bfd_error_bad_value);
4966 return FALSE;
4967 }
4968 }
4969
4970 return TRUE;
4971 }
4972
4973 static void
4974 ppc_elf_vle_split16 (bfd *input_bfd,
4975 asection *input_section,
4976 unsigned long offset,
4977 bfd_byte *loc,
4978 bfd_vma value,
4979 split16_format_type split16_format,
4980 bfd_boolean fixup)
4981 {
4982 unsigned int insn, opcode, top5;
4983
4984 insn = bfd_get_32 (input_bfd, loc);
4985 opcode = insn & 0xfc00f800;
4986 if (opcode == E_OR2I_INSN
4987 || opcode == E_AND2I_DOT_INSN
4988 || opcode == E_OR2IS_INSN
4989 || opcode == E_LIS_INSN
4990 || opcode == E_AND2IS_DOT_INSN)
4991 {
4992 if (split16_format != split16a_type)
4993 {
4994 if (fixup)
4995 split16_format = split16a_type;
4996 else
4997 _bfd_error_handler
4998 /* xgettext:c-format */
4999 (_("%pB(%pA+0x%lx): expected 16A style relocation on 0x%08x insn"),
5000 input_bfd, input_section, offset, opcode);
5001 }
5002 }
5003 else if (opcode == E_ADD2I_DOT_INSN
5004 || opcode == E_ADD2IS_INSN
5005 || opcode == E_CMP16I_INSN
5006 || opcode == E_MULL2I_INSN
5007 || opcode == E_CMPL16I_INSN
5008 || opcode == E_CMPH16I_INSN
5009 || opcode == E_CMPHL16I_INSN)
5010 {
5011 if (split16_format != split16d_type)
5012 {
5013 if (fixup)
5014 split16_format = split16d_type;
5015 else
5016 _bfd_error_handler
5017 /* xgettext:c-format */
5018 (_("%pB(%pA+0x%lx): expected 16D style relocation on 0x%08x insn"),
5019 input_bfd, input_section, offset, opcode);
5020 }
5021 }
5022 top5 = value & 0xf800;
5023 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
5024 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
5025 insn |= top5;
5026 insn |= value & 0x7ff;
5027 bfd_put_32 (input_bfd, insn, loc);
5028 }
5029
5030 static void
5031 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
5032 {
5033 unsigned int insn;
5034
5035 insn = bfd_get_32 (output_bfd, loc);
5036 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
5037 /* Top 4 bits of value to 17..20. */
5038 insn |= (value & 0xf0000) >> 5;
5039 /* Next 5 bits of the value to 11..15. */
5040 insn |= (value & 0xf800) << 5;
5041 /* And the final 11 bits of the value to bits 21 to 31. */
5042 insn |= value & 0x7ff;
5043 bfd_put_32 (output_bfd, insn, loc);
5044 }
5045
5046 \f
5047 /* Choose which PLT scheme to use, and set .plt flags appropriately.
5048 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
5049 int
5050 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
5051 struct bfd_link_info *info)
5052 {
5053 struct ppc_elf_link_hash_table *htab;
5054 flagword flags;
5055
5056 htab = ppc_elf_hash_table (info);
5057
5058 if (htab->plt_type == PLT_UNSET)
5059 {
5060 struct elf_link_hash_entry *h;
5061
5062 if (htab->params->plt_style == PLT_OLD)
5063 htab->plt_type = PLT_OLD;
5064 else if (bfd_link_pic (info)
5065 && htab->elf.dynamic_sections_created
5066 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
5067 FALSE, FALSE, TRUE)) != NULL
5068 && (h->type == STT_FUNC
5069 || h->needs_plt)
5070 && h->ref_regular
5071 && !(SYMBOL_CALLS_LOCAL (info, h)
5072 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5073 {
5074 /* Profiling of shared libs (and pies) is not supported with
5075 secure plt, because ppc32 does profiling before a
5076 function prologue and a secure plt pic call stubs needs
5077 r30 to be set up. */
5078 htab->plt_type = PLT_OLD;
5079 }
5080 else
5081 {
5082 bfd *ibfd;
5083 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
5084
5085 /* Look through the reloc flags left by ppc_elf_check_relocs.
5086 Use the old style bss plt if a file makes plt calls
5087 without using the new relocs, and if ld isn't given
5088 --secure-plt and we never see REL16 relocs. */
5089 if (plt_type == PLT_UNSET)
5090 plt_type = PLT_OLD;
5091 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
5092 if (is_ppc_elf (ibfd))
5093 {
5094 if (ppc_elf_tdata (ibfd)->has_rel16)
5095 plt_type = PLT_NEW;
5096 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5097 {
5098 plt_type = PLT_OLD;
5099 htab->old_bfd = ibfd;
5100 break;
5101 }
5102 }
5103 htab->plt_type = plt_type;
5104 }
5105 }
5106 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5107 {
5108 if (htab->old_bfd != NULL)
5109 _bfd_error_handler (_("bss-plt forced due to %pB"), htab->old_bfd);
5110 else
5111 _bfd_error_handler (_("bss-plt forced by profiling"));
5112 }
5113
5114 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5115
5116 if (htab->plt_type == PLT_NEW)
5117 {
5118 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5119 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5120
5121 /* The new PLT is a loaded section. */
5122 if (htab->elf.splt != NULL
5123 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5124 return -1;
5125
5126 /* The new GOT is not executable. */
5127 if (htab->elf.sgot != NULL
5128 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5129 return -1;
5130 }
5131 else
5132 {
5133 /* Stop an unused .glink section from affecting .text alignment. */
5134 if (htab->glink != NULL
5135 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5136 return -1;
5137 }
5138 return htab->plt_type == PLT_NEW;
5139 }
5140 \f
5141 /* Return the section that should be marked against GC for a given
5142 relocation. */
5143
5144 static asection *
5145 ppc_elf_gc_mark_hook (asection *sec,
5146 struct bfd_link_info *info,
5147 Elf_Internal_Rela *rel,
5148 struct elf_link_hash_entry *h,
5149 Elf_Internal_Sym *sym)
5150 {
5151 if (h != NULL)
5152 switch (ELF32_R_TYPE (rel->r_info))
5153 {
5154 case R_PPC_GNU_VTINHERIT:
5155 case R_PPC_GNU_VTENTRY:
5156 return NULL;
5157 }
5158
5159 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5160 }
5161
5162 static bfd_boolean
5163 get_sym_h (struct elf_link_hash_entry **hp,
5164 Elf_Internal_Sym **symp,
5165 asection **symsecp,
5166 unsigned char **tls_maskp,
5167 Elf_Internal_Sym **locsymsp,
5168 unsigned long r_symndx,
5169 bfd *ibfd)
5170 {
5171 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5172
5173 if (r_symndx >= symtab_hdr->sh_info)
5174 {
5175 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5176 struct elf_link_hash_entry *h;
5177
5178 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5179 while (h->root.type == bfd_link_hash_indirect
5180 || h->root.type == bfd_link_hash_warning)
5181 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5182
5183 if (hp != NULL)
5184 *hp = h;
5185
5186 if (symp != NULL)
5187 *symp = NULL;
5188
5189 if (symsecp != NULL)
5190 {
5191 asection *symsec = NULL;
5192 if (h->root.type == bfd_link_hash_defined
5193 || h->root.type == bfd_link_hash_defweak)
5194 symsec = h->root.u.def.section;
5195 *symsecp = symsec;
5196 }
5197
5198 if (tls_maskp != NULL)
5199 *tls_maskp = &ppc_elf_hash_entry (h)->tls_mask;
5200 }
5201 else
5202 {
5203 Elf_Internal_Sym *sym;
5204 Elf_Internal_Sym *locsyms = *locsymsp;
5205
5206 if (locsyms == NULL)
5207 {
5208 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5209 if (locsyms == NULL)
5210 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5211 symtab_hdr->sh_info,
5212 0, NULL, NULL, NULL);
5213 if (locsyms == NULL)
5214 return FALSE;
5215 *locsymsp = locsyms;
5216 }
5217 sym = locsyms + r_symndx;
5218
5219 if (hp != NULL)
5220 *hp = NULL;
5221
5222 if (symp != NULL)
5223 *symp = sym;
5224
5225 if (symsecp != NULL)
5226 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5227
5228 if (tls_maskp != NULL)
5229 {
5230 bfd_signed_vma *local_got;
5231 unsigned char *tls_mask;
5232
5233 tls_mask = NULL;
5234 local_got = elf_local_got_refcounts (ibfd);
5235 if (local_got != NULL)
5236 {
5237 struct plt_entry **local_plt = (struct plt_entry **)
5238 (local_got + symtab_hdr->sh_info);
5239 unsigned char *lgot_masks = (unsigned char *)
5240 (local_plt + symtab_hdr->sh_info);
5241 tls_mask = &lgot_masks[r_symndx];
5242 }
5243 *tls_maskp = tls_mask;
5244 }
5245 }
5246 return TRUE;
5247 }
5248 \f
5249 /* Analyze inline PLT call relocations to see whether calls to locally
5250 defined functions can be converted to direct calls. */
5251
5252 bfd_boolean
5253 ppc_elf_inline_plt (struct bfd_link_info *info)
5254 {
5255 struct ppc_elf_link_hash_table *htab;
5256 bfd *ibfd;
5257 asection *sec;
5258 bfd_vma low_vma, high_vma, limit;
5259
5260 htab = ppc_elf_hash_table (info);
5261 if (htab == NULL)
5262 return FALSE;
5263
5264 /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is
5265 reduced somewhat to cater for possible stubs that might be added
5266 between the call and its destination. */
5267 limit = 0x1e00000;
5268 low_vma = -1;
5269 high_vma = 0;
5270 for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next)
5271 if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE))
5272 {
5273 if (low_vma > sec->vma)
5274 low_vma = sec->vma;
5275 if (high_vma < sec->vma + sec->size)
5276 high_vma = sec->vma + sec->size;
5277 }
5278
5279 /* If a "bl" can reach anywhere in local code sections, then we can
5280 convert all inline PLT sequences to direct calls when the symbol
5281 is local. */
5282 if (high_vma - low_vma < limit)
5283 {
5284 htab->can_convert_all_inline_plt = 1;
5285 return TRUE;
5286 }
5287
5288 /* Otherwise, go looking through relocs for cases where a direct
5289 call won't reach. Mark the symbol on any such reloc to disable
5290 the optimization and keep the PLT entry as it seems likely that
5291 this will be better than creating trampolines. Note that this
5292 will disable the optimization for all inline PLT calls to a
5293 particular symbol, not just those that won't reach. The
5294 difficulty in doing a more precise optimization is that the
5295 linker needs to make a decision depending on whether a
5296 particular R_PPC_PLTCALL insn can be turned into a direct
5297 call, for each of the R_PPC_PLTSEQ and R_PPC_PLT16* insns in
5298 the sequence, and there is nothing that ties those relocs
5299 together except their symbol. */
5300
5301 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5302 {
5303 Elf_Internal_Shdr *symtab_hdr;
5304 Elf_Internal_Sym *local_syms;
5305
5306 if (!is_ppc_elf (ibfd))
5307 continue;
5308
5309 local_syms = NULL;
5310 symtab_hdr = &elf_symtab_hdr (ibfd);
5311
5312 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5313 if (sec->has_pltcall
5314 && !bfd_is_abs_section (sec->output_section))
5315 {
5316 Elf_Internal_Rela *relstart, *rel, *relend;
5317
5318 /* Read the relocations. */
5319 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5320 info->keep_memory);
5321 if (relstart == NULL)
5322 return FALSE;
5323
5324 relend = relstart + sec->reloc_count;
5325 for (rel = relstart; rel < relend; )
5326 {
5327 enum elf_ppc_reloc_type r_type;
5328 unsigned long r_symndx;
5329 asection *sym_sec;
5330 struct elf_link_hash_entry *h;
5331 Elf_Internal_Sym *sym;
5332 unsigned char *tls_maskp;
5333
5334 r_type = ELF32_R_TYPE (rel->r_info);
5335 if (r_type != R_PPC_PLTCALL)
5336 continue;
5337
5338 r_symndx = ELF32_R_SYM (rel->r_info);
5339 if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms,
5340 r_symndx, ibfd))
5341 {
5342 if (elf_section_data (sec)->relocs != relstart)
5343 free (relstart);
5344 if (local_syms != NULL
5345 && symtab_hdr->contents != (unsigned char *) local_syms)
5346 free (local_syms);
5347 return FALSE;
5348 }
5349
5350 if (sym_sec != NULL && sym_sec->output_section != NULL)
5351 {
5352 bfd_vma from, to;
5353 if (h != NULL)
5354 to = h->root.u.def.value;
5355 else
5356 to = sym->st_value;
5357 to += (rel->r_addend
5358 + sym_sec->output_offset
5359 + sym_sec->output_section->vma);
5360 from = (rel->r_offset
5361 + sec->output_offset
5362 + sec->output_section->vma);
5363 if (to - from + limit < 2 * limit)
5364 *tls_maskp &= ~PLT_KEEP;
5365 }
5366 }
5367 if (elf_section_data (sec)->relocs != relstart)
5368 free (relstart);
5369 }
5370
5371 if (local_syms != NULL
5372 && symtab_hdr->contents != (unsigned char *) local_syms)
5373 {
5374 if (!info->keep_memory)
5375 free (local_syms);
5376 else
5377 symtab_hdr->contents = (unsigned char *) local_syms;
5378 }
5379 }
5380
5381 return TRUE;
5382 }
5383
5384 /* Set plt output section type, htab->tls_get_addr, and call the
5385 generic ELF tls_setup function. */
5386
5387 asection *
5388 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5389 {
5390 struct ppc_elf_link_hash_table *htab;
5391
5392 htab = ppc_elf_hash_table (info);
5393 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5394 FALSE, FALSE, TRUE);
5395 if (htab->plt_type != PLT_NEW)
5396 htab->params->no_tls_get_addr_opt = TRUE;
5397
5398 if (!htab->params->no_tls_get_addr_opt)
5399 {
5400 struct elf_link_hash_entry *opt, *tga;
5401 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5402 FALSE, FALSE, TRUE);
5403 if (opt != NULL
5404 && (opt->root.type == bfd_link_hash_defined
5405 || opt->root.type == bfd_link_hash_defweak))
5406 {
5407 /* If glibc supports an optimized __tls_get_addr call stub,
5408 signalled by the presence of __tls_get_addr_opt, and we'll
5409 be calling __tls_get_addr via a plt call stub, then
5410 make __tls_get_addr point to __tls_get_addr_opt. */
5411 tga = htab->tls_get_addr;
5412 if (htab->elf.dynamic_sections_created
5413 && tga != NULL
5414 && (tga->type == STT_FUNC
5415 || tga->needs_plt)
5416 && !(SYMBOL_CALLS_LOCAL (info, tga)
5417 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5418 {
5419 struct plt_entry *ent;
5420 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5421 if (ent->plt.refcount > 0)
5422 break;
5423 if (ent != NULL)
5424 {
5425 tga->root.type = bfd_link_hash_indirect;
5426 tga->root.u.i.link = &opt->root;
5427 ppc_elf_copy_indirect_symbol (info, opt, tga);
5428 opt->mark = 1;
5429 if (opt->dynindx != -1)
5430 {
5431 /* Use __tls_get_addr_opt in dynamic relocations. */
5432 opt->dynindx = -1;
5433 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5434 opt->dynstr_index);
5435 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5436 return FALSE;
5437 }
5438 htab->tls_get_addr = opt;
5439 }
5440 }
5441 }
5442 else
5443 htab->params->no_tls_get_addr_opt = TRUE;
5444 }
5445 if (htab->plt_type == PLT_NEW
5446 && htab->elf.splt != NULL
5447 && htab->elf.splt->output_section != NULL)
5448 {
5449 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5450 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5451 }
5452
5453 return _bfd_elf_tls_setup (obfd, info);
5454 }
5455
5456 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5457 HASH. */
5458
5459 static bfd_boolean
5460 branch_reloc_hash_match (const bfd *ibfd,
5461 const Elf_Internal_Rela *rel,
5462 const struct elf_link_hash_entry *hash)
5463 {
5464 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5465 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5466 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5467
5468 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5469 {
5470 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5471 struct elf_link_hash_entry *h;
5472
5473 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5474 while (h->root.type == bfd_link_hash_indirect
5475 || h->root.type == bfd_link_hash_warning)
5476 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5477 if (h == hash)
5478 return TRUE;
5479 }
5480 return FALSE;
5481 }
5482
5483 /* Run through all the TLS relocs looking for optimization
5484 opportunities. */
5485
5486 bfd_boolean
5487 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5488 struct bfd_link_info *info)
5489 {
5490 bfd *ibfd;
5491 asection *sec;
5492 struct ppc_elf_link_hash_table *htab;
5493 int pass;
5494
5495 if (!bfd_link_executable (info))
5496 return TRUE;
5497
5498 htab = ppc_elf_hash_table (info);
5499 if (htab == NULL)
5500 return FALSE;
5501
5502 /* Make two passes through the relocs. First time check that tls
5503 relocs involved in setting up a tls_get_addr call are indeed
5504 followed by such a call. If they are not, don't do any tls
5505 optimization. On the second pass twiddle tls_mask flags to
5506 notify relocate_section that optimization can be done, and
5507 adjust got and plt refcounts. */
5508 for (pass = 0; pass < 2; ++pass)
5509 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5510 {
5511 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5512 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5513
5514 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5515 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5516 {
5517 Elf_Internal_Rela *relstart, *rel, *relend;
5518 int expecting_tls_get_addr = 0;
5519
5520 /* Read the relocations. */
5521 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5522 info->keep_memory);
5523 if (relstart == NULL)
5524 return FALSE;
5525
5526 relend = relstart + sec->reloc_count;
5527 for (rel = relstart; rel < relend; rel++)
5528 {
5529 enum elf_ppc_reloc_type r_type;
5530 unsigned long r_symndx;
5531 struct elf_link_hash_entry *h = NULL;
5532 unsigned char *tls_mask;
5533 unsigned char tls_set, tls_clear;
5534 bfd_boolean is_local;
5535 bfd_signed_vma *got_count;
5536
5537 r_symndx = ELF32_R_SYM (rel->r_info);
5538 if (r_symndx >= symtab_hdr->sh_info)
5539 {
5540 struct elf_link_hash_entry **sym_hashes;
5541
5542 sym_hashes = elf_sym_hashes (ibfd);
5543 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5544 while (h->root.type == bfd_link_hash_indirect
5545 || h->root.type == bfd_link_hash_warning)
5546 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5547 }
5548
5549 is_local = FALSE;
5550 if (h == NULL
5551 || !h->def_dynamic)
5552 is_local = TRUE;
5553
5554 r_type = ELF32_R_TYPE (rel->r_info);
5555 /* If this section has old-style __tls_get_addr calls
5556 without marker relocs, then check that each
5557 __tls_get_addr call reloc is preceded by a reloc
5558 that conceivably belongs to the __tls_get_addr arg
5559 setup insn. If we don't find matching arg setup
5560 relocs, don't do any tls optimization. */
5561 if (pass == 0
5562 && sec->has_tls_get_addr_call
5563 && h != NULL
5564 && h == htab->tls_get_addr
5565 && !expecting_tls_get_addr
5566 && is_branch_reloc (r_type))
5567 {
5568 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5569 "TLS optimization disabled\n",
5570 ibfd, sec, rel->r_offset);
5571 if (elf_section_data (sec)->relocs != relstart)
5572 free (relstart);
5573 return TRUE;
5574 }
5575
5576 expecting_tls_get_addr = 0;
5577 switch (r_type)
5578 {
5579 case R_PPC_GOT_TLSLD16:
5580 case R_PPC_GOT_TLSLD16_LO:
5581 expecting_tls_get_addr = 1;
5582 /* Fall through. */
5583
5584 case R_PPC_GOT_TLSLD16_HI:
5585 case R_PPC_GOT_TLSLD16_HA:
5586 /* These relocs should never be against a symbol
5587 defined in a shared lib. Leave them alone if
5588 that turns out to be the case. */
5589 if (!is_local)
5590 continue;
5591
5592 /* LD -> LE */
5593 tls_set = 0;
5594 tls_clear = TLS_LD;
5595 break;
5596
5597 case R_PPC_GOT_TLSGD16:
5598 case R_PPC_GOT_TLSGD16_LO:
5599 expecting_tls_get_addr = 1;
5600 /* Fall through. */
5601
5602 case R_PPC_GOT_TLSGD16_HI:
5603 case R_PPC_GOT_TLSGD16_HA:
5604 if (is_local)
5605 /* GD -> LE */
5606 tls_set = 0;
5607 else
5608 /* GD -> IE */
5609 tls_set = TLS_TLS | TLS_TPRELGD;
5610 tls_clear = TLS_GD;
5611 break;
5612
5613 case R_PPC_GOT_TPREL16:
5614 case R_PPC_GOT_TPREL16_LO:
5615 case R_PPC_GOT_TPREL16_HI:
5616 case R_PPC_GOT_TPREL16_HA:
5617 if (is_local)
5618 {
5619 /* IE -> LE */
5620 tls_set = 0;
5621 tls_clear = TLS_TPREL;
5622 break;
5623 }
5624 else
5625 continue;
5626
5627 case R_PPC_TLSGD:
5628 case R_PPC_TLSLD:
5629 if (rel + 1 < relend
5630 && is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
5631 {
5632 if (pass != 0
5633 && ELF32_R_TYPE (rel[1].r_info) != R_PPC_PLTSEQ)
5634 {
5635 r_type = ELF32_R_TYPE (rel[1].r_info);
5636 r_symndx = ELF32_R_SYM (rel[1].r_info);
5637 if (r_symndx >= symtab_hdr->sh_info)
5638 {
5639 struct elf_link_hash_entry **sym_hashes;
5640
5641 sym_hashes = elf_sym_hashes (ibfd);
5642 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5643 while (h->root.type == bfd_link_hash_indirect
5644 || h->root.type == bfd_link_hash_warning)
5645 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5646 if (h != NULL)
5647 {
5648 struct plt_entry *ent = NULL;
5649 bfd_vma addend = 0;
5650
5651 if (bfd_link_pic (info))
5652 addend = rel->r_addend;
5653 ent = find_plt_ent (&h->plt.plist,
5654 got2, addend);
5655 if (ent != NULL
5656 && ent->plt.refcount > 0)
5657 ent->plt.refcount -= 1;
5658 }
5659 }
5660 }
5661 continue;
5662 }
5663 expecting_tls_get_addr = 2;
5664 tls_set = 0;
5665 tls_clear = 0;
5666 break;
5667
5668 default:
5669 continue;
5670 }
5671
5672 if (pass == 0)
5673 {
5674 if (!expecting_tls_get_addr
5675 || !sec->has_tls_get_addr_call)
5676 continue;
5677
5678 if (rel + 1 < relend
5679 && branch_reloc_hash_match (ibfd, rel + 1,
5680 htab->tls_get_addr))
5681 continue;
5682
5683 /* Uh oh, we didn't find the expected call. We
5684 could just mark this symbol to exclude it
5685 from tls optimization but it's safer to skip
5686 the entire optimization. */
5687 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5688 "TLS optimization disabled\n"),
5689 ibfd, sec, rel->r_offset);
5690 if (elf_section_data (sec)->relocs != relstart)
5691 free (relstart);
5692 return TRUE;
5693 }
5694
5695 if (h != NULL)
5696 {
5697 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5698 got_count = &h->got.refcount;
5699 }
5700 else
5701 {
5702 bfd_signed_vma *lgot_refs;
5703 struct plt_entry **local_plt;
5704 unsigned char *lgot_masks;
5705
5706 lgot_refs = elf_local_got_refcounts (ibfd);
5707 if (lgot_refs == NULL)
5708 abort ();
5709 local_plt = (struct plt_entry **)
5710 (lgot_refs + symtab_hdr->sh_info);
5711 lgot_masks = (unsigned char *)
5712 (local_plt + symtab_hdr->sh_info);
5713 tls_mask = &lgot_masks[r_symndx];
5714 got_count = &lgot_refs[r_symndx];
5715 }
5716
5717 /* If we don't have old-style __tls_get_addr calls
5718 without TLSGD/TLSLD marker relocs, and we haven't
5719 found a new-style __tls_get_addr call with a
5720 marker for this symbol, then we either have a
5721 broken object file or an -mlongcall style
5722 indirect call to __tls_get_addr without a marker.
5723 Disable optimization in this case. */
5724 if ((tls_clear & (TLS_GD | TLS_LD)) != 0
5725 && !sec->has_tls_get_addr_call
5726 && ((*tls_mask & (TLS_TLS | TLS_MARK))
5727 != (TLS_TLS | TLS_MARK)))
5728 continue;
5729
5730 if (expecting_tls_get_addr)
5731 {
5732 struct plt_entry *ent;
5733 bfd_vma addend = 0;
5734
5735 if (bfd_link_pic (info)
5736 && (ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24
5737 || ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTCALL))
5738 addend = rel[1].r_addend;
5739 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5740 got2, addend);
5741 if (ent != NULL && ent->plt.refcount > 0)
5742 ent->plt.refcount -= 1;
5743
5744 if (expecting_tls_get_addr == 2)
5745 continue;
5746 }
5747
5748 if (tls_set == 0)
5749 {
5750 /* We managed to get rid of a got entry. */
5751 if (*got_count > 0)
5752 *got_count -= 1;
5753 }
5754
5755 *tls_mask |= tls_set;
5756 *tls_mask &= ~tls_clear;
5757 }
5758
5759 if (elf_section_data (sec)->relocs != relstart)
5760 free (relstart);
5761 }
5762 }
5763 htab->do_tls_opt = 1;
5764 return TRUE;
5765 }
5766 \f
5767 /* Find dynamic relocs for H that apply to read-only sections. */
5768
5769 static asection *
5770 readonly_dynrelocs (struct elf_link_hash_entry *h)
5771 {
5772 struct elf_dyn_relocs *p;
5773
5774 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5775 {
5776 asection *s = p->sec->output_section;
5777
5778 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5779 return p->sec;
5780 }
5781 return NULL;
5782 }
5783
5784 /* Return true if we have dynamic relocs against H or any of its weak
5785 aliases, that apply to read-only sections. Cannot be used after
5786 size_dynamic_sections. */
5787
5788 static bfd_boolean
5789 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
5790 {
5791 struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h);
5792 do
5793 {
5794 if (readonly_dynrelocs (&eh->elf))
5795 return TRUE;
5796 eh = ppc_elf_hash_entry (eh->elf.u.alias);
5797 } while (eh != NULL && &eh->elf != h);
5798
5799 return FALSE;
5800 }
5801
5802 /* Return whether H has pc-relative dynamic relocs. */
5803
5804 static bfd_boolean
5805 pc_dynrelocs (struct elf_link_hash_entry *h)
5806 {
5807 struct elf_dyn_relocs *p;
5808
5809 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5810 if (p->pc_count != 0)
5811 return TRUE;
5812 return FALSE;
5813 }
5814
5815 /* Adjust a symbol defined by a dynamic object and referenced by a
5816 regular object. The current definition is in some section of the
5817 dynamic object, but we're not including those sections. We have to
5818 change the definition to something the rest of the link can
5819 understand. */
5820
5821 static bfd_boolean
5822 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5823 struct elf_link_hash_entry *h)
5824 {
5825 struct ppc_elf_link_hash_table *htab;
5826 asection *s;
5827
5828 #ifdef DEBUG
5829 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5830 h->root.root.string);
5831 #endif
5832
5833 /* Make sure we know what is going on here. */
5834 htab = ppc_elf_hash_table (info);
5835 BFD_ASSERT (htab->elf.dynobj != NULL
5836 && (h->needs_plt
5837 || h->type == STT_GNU_IFUNC
5838 || h->is_weakalias
5839 || (h->def_dynamic
5840 && h->ref_regular
5841 && !h->def_regular)));
5842
5843 /* Deal with function syms. */
5844 if (h->type == STT_FUNC
5845 || h->type == STT_GNU_IFUNC
5846 || h->needs_plt)
5847 {
5848 bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, h)
5849 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
5850 /* Discard dyn_relocs when non-pic if we've decided that a
5851 function symbol is local. */
5852 if (!bfd_link_pic (info) && local)
5853 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5854
5855 /* Clear procedure linkage table information for any symbol that
5856 won't need a .plt entry. */
5857 struct plt_entry *ent;
5858 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5859 if (ent->plt.refcount > 0)
5860 break;
5861 if (ent == NULL
5862 || (h->type != STT_GNU_IFUNC
5863 && local
5864 && (htab->can_convert_all_inline_plt
5865 || (ppc_elf_hash_entry (h)->tls_mask
5866 & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)))
5867 {
5868 /* A PLT entry is not required/allowed when:
5869
5870 1. We are not using ld.so; because then the PLT entry
5871 can't be set up, so we can't use one. In this case,
5872 ppc_elf_adjust_dynamic_symbol won't even be called.
5873
5874 2. GC has rendered the entry unused.
5875
5876 3. We know for certain that a call to this symbol
5877 will go to this object, or will remain undefined. */
5878 h->plt.plist = NULL;
5879 h->needs_plt = 0;
5880 h->pointer_equality_needed = 0;
5881 }
5882 else
5883 {
5884 /* Taking a function's address in a read/write section
5885 doesn't require us to define the function symbol in the
5886 executable on a plt call stub. A dynamic reloc can
5887 be used instead, giving better runtime performance.
5888 (Calls via that function pointer don't need to bounce
5889 through the plt call stub.) Similarly, use a dynamic
5890 reloc for a weak reference when possible, allowing the
5891 resolution of the symbol to be set at load time rather
5892 than link time. */
5893 if ((h->pointer_equality_needed
5894 || (h->non_got_ref
5895 && !h->ref_regular_nonweak
5896 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5897 && !htab->is_vxworks
5898 && !ppc_elf_hash_entry (h)->has_sda_refs
5899 && !readonly_dynrelocs (h))
5900 {
5901 h->pointer_equality_needed = 0;
5902 /* If we haven't seen a branch reloc and the symbol
5903 isn't an ifunc then we don't need a plt entry. */
5904 if (!h->needs_plt && h->type != STT_GNU_IFUNC)
5905 h->plt.plist = NULL;
5906 }
5907 else if (!bfd_link_pic (info))
5908 /* We are going to be defining the function symbol on the
5909 plt stub, so no dyn_relocs needed when non-pic. */
5910 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5911 }
5912 h->protected_def = 0;
5913 /* Function symbols can't have copy relocs. */
5914 return TRUE;
5915 }
5916 else
5917 h->plt.plist = NULL;
5918
5919 /* If this is a weak symbol, and there is a real definition, the
5920 processor independent code will have arranged for us to see the
5921 real definition first, and we can just use the same value. */
5922 if (h->is_weakalias)
5923 {
5924 struct elf_link_hash_entry *def = weakdef (h);
5925 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5926 h->root.u.def.section = def->root.u.def.section;
5927 h->root.u.def.value = def->root.u.def.value;
5928 if (def->root.u.def.section == htab->elf.sdynbss
5929 || def->root.u.def.section == htab->elf.sdynrelro
5930 || def->root.u.def.section == htab->dynsbss)
5931 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5932 return TRUE;
5933 }
5934
5935 /* This is a reference to a symbol defined by a dynamic object which
5936 is not a function. */
5937
5938 /* If we are creating a shared library, we must presume that the
5939 only references to the symbol are via the global offset table.
5940 For such cases we need not do anything here; the relocations will
5941 be handled correctly by relocate_section. */
5942 if (bfd_link_pic (info))
5943 {
5944 h->protected_def = 0;
5945 return TRUE;
5946 }
5947
5948 /* If there are no references to this symbol that do not use the
5949 GOT, we don't need to generate a copy reloc. */
5950 if (!h->non_got_ref)
5951 {
5952 h->protected_def = 0;
5953 return TRUE;
5954 }
5955
5956 /* Protected variables do not work with .dynbss. The copy in
5957 .dynbss won't be used by the shared library with the protected
5958 definition for the variable. Editing to PIC, or text relocations
5959 are preferable to an incorrect program. */
5960 if (h->protected_def)
5961 {
5962 if (ELIMINATE_COPY_RELOCS
5963 && ppc_elf_hash_entry (h)->has_addr16_ha
5964 && ppc_elf_hash_entry (h)->has_addr16_lo
5965 && htab->params->pic_fixup == 0
5966 && info->disable_target_specific_optimizations <= 1)
5967 htab->params->pic_fixup = 1;
5968 return TRUE;
5969 }
5970
5971 /* If -z nocopyreloc was given, we won't generate them either. */
5972 if (info->nocopyreloc)
5973 return TRUE;
5974
5975 /* If we don't find any dynamic relocs in read-only sections, then
5976 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5977 We can't do this if there are any small data relocations. This
5978 doesn't work on VxWorks, where we can not have dynamic
5979 relocations (other than copy and jump slot relocations) in an
5980 executable. */
5981 if (ELIMINATE_COPY_RELOCS
5982 && !ppc_elf_hash_entry (h)->has_sda_refs
5983 && !htab->is_vxworks
5984 && !h->def_regular
5985 && !alias_readonly_dynrelocs (h))
5986 return TRUE;
5987
5988 /* We must allocate the symbol in our .dynbss section, which will
5989 become part of the .bss section of the executable. There will be
5990 an entry for this symbol in the .dynsym section. The dynamic
5991 object will contain position independent code, so all references
5992 from the dynamic object to this symbol will go through the global
5993 offset table. The dynamic linker will use the .dynsym entry to
5994 determine the address it must put in the global offset table, so
5995 both the dynamic object and the regular object will refer to the
5996 same memory location for the variable.
5997
5998 Of course, if the symbol is referenced using SDAREL relocs, we
5999 must instead allocate it in .sbss. */
6000 if (ppc_elf_hash_entry (h)->has_sda_refs)
6001 s = htab->dynsbss;
6002 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
6003 s = htab->elf.sdynrelro;
6004 else
6005 s = htab->elf.sdynbss;
6006 BFD_ASSERT (s != NULL);
6007
6008 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6009 {
6010 asection *srel;
6011
6012 /* We must generate a R_PPC_COPY reloc to tell the dynamic
6013 linker to copy the initial value out of the dynamic object
6014 and into the runtime process image. */
6015 if (ppc_elf_hash_entry (h)->has_sda_refs)
6016 srel = htab->relsbss;
6017 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
6018 srel = htab->elf.sreldynrelro;
6019 else
6020 srel = htab->elf.srelbss;
6021 BFD_ASSERT (srel != NULL);
6022 srel->size += sizeof (Elf32_External_Rela);
6023 h->needs_copy = 1;
6024 }
6025
6026 /* We no longer want dyn_relocs. */
6027 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
6028 return _bfd_elf_adjust_dynamic_copy (info, h, s);
6029 }
6030 \f
6031 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
6032 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
6033 specifying the addend on the plt relocation. For -fpic code, the sym
6034 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
6035 xxxxxxxx.got2.plt_pic32.<callee>. */
6036
6037 static bfd_boolean
6038 add_stub_sym (struct plt_entry *ent,
6039 struct elf_link_hash_entry *h,
6040 struct bfd_link_info *info)
6041 {
6042 struct elf_link_hash_entry *sh;
6043 size_t len1, len2, len3;
6044 char *name;
6045 const char *stub;
6046 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6047
6048 if (bfd_link_pic (info))
6049 stub = ".plt_pic32.";
6050 else
6051 stub = ".plt_call32.";
6052
6053 len1 = strlen (h->root.root.string);
6054 len2 = strlen (stub);
6055 len3 = 0;
6056 if (ent->sec)
6057 len3 = strlen (ent->sec->name);
6058 name = bfd_malloc (len1 + len2 + len3 + 9);
6059 if (name == NULL)
6060 return FALSE;
6061 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
6062 if (ent->sec)
6063 memcpy (name + 8, ent->sec->name, len3);
6064 memcpy (name + 8 + len3, stub, len2);
6065 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
6066 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
6067 if (sh == NULL)
6068 return FALSE;
6069 if (sh->root.type == bfd_link_hash_new)
6070 {
6071 sh->root.type = bfd_link_hash_defined;
6072 sh->root.u.def.section = htab->glink;
6073 sh->root.u.def.value = ent->glink_offset;
6074 sh->ref_regular = 1;
6075 sh->def_regular = 1;
6076 sh->ref_regular_nonweak = 1;
6077 sh->forced_local = 1;
6078 sh->non_elf = 0;
6079 sh->root.linker_def = 1;
6080 }
6081 return TRUE;
6082 }
6083
6084 /* Allocate NEED contiguous space in .got, and return the offset.
6085 Handles allocation of the got header when crossing 32k. */
6086
6087 static bfd_vma
6088 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
6089 {
6090 bfd_vma where;
6091 unsigned int max_before_header;
6092
6093 if (htab->plt_type == PLT_VXWORKS)
6094 {
6095 where = htab->elf.sgot->size;
6096 htab->elf.sgot->size += need;
6097 }
6098 else
6099 {
6100 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
6101 if (need <= htab->got_gap)
6102 {
6103 where = max_before_header - htab->got_gap;
6104 htab->got_gap -= need;
6105 }
6106 else
6107 {
6108 if (htab->elf.sgot->size + need > max_before_header
6109 && htab->elf.sgot->size <= max_before_header)
6110 {
6111 htab->got_gap = max_before_header - htab->elf.sgot->size;
6112 htab->elf.sgot->size = max_before_header + htab->got_header_size;
6113 }
6114 where = htab->elf.sgot->size;
6115 htab->elf.sgot->size += need;
6116 }
6117 }
6118 return where;
6119 }
6120
6121 /* Calculate size of GOT entries for symbol given its TLS_MASK.
6122 TLS_LD is excluded because those go in a special GOT slot. */
6123
6124 static inline unsigned int
6125 got_entries_needed (int tls_mask)
6126 {
6127 unsigned int need;
6128 if ((tls_mask & TLS_TLS) == 0)
6129 need = 4;
6130 else
6131 {
6132 need = 0;
6133 if ((tls_mask & TLS_GD) != 0)
6134 need += 8;
6135 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6136 need += 4;
6137 if ((tls_mask & TLS_DTPREL) != 0)
6138 need += 4;
6139 }
6140 return need;
6141 }
6142
6143 /* Calculate size of relocs needed for symbol given its TLS_MASK and
6144 NEEDed GOT entries. KNOWN says a TPREL offset can be calculated at
6145 link time. */
6146
6147 static inline unsigned int
6148 got_relocs_needed (int tls_mask, unsigned int need, bfd_boolean known)
6149 {
6150 /* All the entries we allocated need relocs.
6151 Except IE in executable with a local symbol. We could also omit
6152 the DTPREL reloc on the second word of a GD entry under the same
6153 condition as that for IE, but ld.so needs to differentiate
6154 LD and GD entries. */
6155 if (known && (tls_mask & TLS_TLS) != 0
6156 && (tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6157 need -= 4;
6158 return need * sizeof (Elf32_External_Rela) / 4;
6159 }
6160
6161 /* If H is undefined, make it dynamic if that makes sense. */
6162
6163 static bfd_boolean
6164 ensure_undef_dynamic (struct bfd_link_info *info,
6165 struct elf_link_hash_entry *h)
6166 {
6167 struct elf_link_hash_table *htab = elf_hash_table (info);
6168
6169 if (htab->dynamic_sections_created
6170 && ((info->dynamic_undefined_weak != 0
6171 && h->root.type == bfd_link_hash_undefweak)
6172 || h->root.type == bfd_link_hash_undefined)
6173 && h->dynindx == -1
6174 && !h->forced_local
6175 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
6176 return bfd_elf_link_record_dynamic_symbol (info, h);
6177 return TRUE;
6178 }
6179
6180 /* Allocate space in associated reloc sections for dynamic relocs. */
6181
6182 static bfd_boolean
6183 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6184 {
6185 struct bfd_link_info *info = inf;
6186 struct ppc_elf_link_hash_entry *eh;
6187 struct ppc_elf_link_hash_table *htab;
6188 struct elf_dyn_relocs *p;
6189 bfd_boolean dyn;
6190
6191 if (h->root.type == bfd_link_hash_indirect)
6192 return TRUE;
6193
6194 htab = ppc_elf_hash_table (info);
6195 eh = (struct ppc_elf_link_hash_entry *) h;
6196 if (eh->elf.got.refcount > 0
6197 || (ELIMINATE_COPY_RELOCS
6198 && !eh->elf.def_regular
6199 && eh->elf.protected_def
6200 && eh->has_addr16_ha
6201 && eh->has_addr16_lo
6202 && htab->params->pic_fixup > 0))
6203 {
6204 unsigned int need;
6205
6206 /* Make sure this symbol is output as a dynamic symbol. */
6207 if (!ensure_undef_dynamic (info, &eh->elf))
6208 return FALSE;
6209
6210 need = 0;
6211 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
6212 {
6213 if (!eh->elf.def_dynamic)
6214 /* We'll just use htab->tlsld_got.offset. This should
6215 always be the case. It's a little odd if we have
6216 a local dynamic reloc against a non-local symbol. */
6217 htab->tlsld_got.refcount += 1;
6218 else
6219 need += 8;
6220 }
6221 need += got_entries_needed (eh->tls_mask);
6222 if (need == 0)
6223 eh->elf.got.offset = (bfd_vma) -1;
6224 else
6225 {
6226 eh->elf.got.offset = allocate_got (htab, need);
6227 if ((bfd_link_pic (info)
6228 || (htab->elf.dynamic_sections_created
6229 && eh->elf.dynindx != -1
6230 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
6231 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
6232 {
6233 asection *rsec;
6234 bfd_boolean tprel_known = (bfd_link_executable (info)
6235 && SYMBOL_REFERENCES_LOCAL (info,
6236 &eh->elf));
6237
6238 need = got_relocs_needed (eh->tls_mask, need, tprel_known);
6239 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD)
6240 && eh->elf.def_dynamic)
6241 need -= sizeof (Elf32_External_Rela);
6242 rsec = htab->elf.srelgot;
6243 if (eh->elf.type == STT_GNU_IFUNC)
6244 rsec = htab->elf.irelplt;
6245 rsec->size += need;
6246 }
6247 }
6248 }
6249 else
6250 eh->elf.got.offset = (bfd_vma) -1;
6251
6252 /* If no dynamic sections we can't have dynamic relocs, except for
6253 IFUNCs which are handled even in static executables. */
6254 if (!htab->elf.dynamic_sections_created
6255 && h->type != STT_GNU_IFUNC)
6256 eh->dyn_relocs = NULL;
6257
6258 /* Discard relocs on undefined symbols that must be local. */
6259 else if (h->root.type == bfd_link_hash_undefined
6260 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6261 eh->dyn_relocs = NULL;
6262
6263 /* Also discard relocs on undefined weak syms with non-default
6264 visibility, or when dynamic_undefined_weak says so. */
6265 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
6266 eh->dyn_relocs = NULL;
6267
6268 if (eh->dyn_relocs == NULL)
6269 ;
6270
6271 /* In the shared -Bsymbolic case, discard space allocated for
6272 dynamic pc-relative relocs against symbols which turn out to be
6273 defined in regular objects. For the normal shared case, discard
6274 space for relocs that have become local due to symbol visibility
6275 changes. */
6276 else if (bfd_link_pic (info))
6277 {
6278 /* Relocs that use pc_count are those that appear on a call insn,
6279 or certain REL relocs (see must_be_dyn_reloc) that can be
6280 generated via assembly. We want calls to protected symbols to
6281 resolve directly to the function rather than going via the plt.
6282 If people want function pointer comparisons to work as expected
6283 then they should avoid writing weird assembly. */
6284 if (SYMBOL_CALLS_LOCAL (info, h))
6285 {
6286 struct elf_dyn_relocs **pp;
6287
6288 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6289 {
6290 p->count -= p->pc_count;
6291 p->pc_count = 0;
6292 if (p->count == 0)
6293 *pp = p->next;
6294 else
6295 pp = &p->next;
6296 }
6297 }
6298
6299 if (htab->is_vxworks)
6300 {
6301 struct elf_dyn_relocs **pp;
6302
6303 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6304 {
6305 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6306 *pp = p->next;
6307 else
6308 pp = &p->next;
6309 }
6310 }
6311
6312 if (eh->dyn_relocs != NULL)
6313 {
6314 /* Make sure this symbol is output as a dynamic symbol. */
6315 if (!ensure_undef_dynamic (info, h))
6316 return FALSE;
6317 }
6318 }
6319 else if (ELIMINATE_COPY_RELOCS)
6320 {
6321 /* For the non-pic case, discard space for relocs against
6322 symbols which turn out to need copy relocs or are not
6323 dynamic. */
6324 if (h->dynamic_adjusted
6325 && !h->def_regular
6326 && !ELF_COMMON_DEF_P (h)
6327 && !(h->protected_def
6328 && eh->has_addr16_ha
6329 && eh->has_addr16_lo
6330 && htab->params->pic_fixup > 0))
6331 {
6332 /* Make sure this symbol is output as a dynamic symbol. */
6333 if (!ensure_undef_dynamic (info, h))
6334 return FALSE;
6335
6336 if (h->dynindx == -1)
6337 eh->dyn_relocs = NULL;
6338 }
6339 else
6340 eh->dyn_relocs = NULL;
6341 }
6342
6343 /* Allocate space. */
6344 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6345 {
6346 asection *sreloc = elf_section_data (p->sec)->sreloc;
6347 if (eh->elf.type == STT_GNU_IFUNC)
6348 sreloc = htab->elf.irelplt;
6349 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6350 }
6351
6352 /* Handle PLT relocs. Done last, after dynindx has settled.
6353 We might need a PLT entry when the symbol
6354 a) is dynamic, or
6355 b) is an ifunc, or
6356 c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or
6357 d) has plt16 relocs and we are linking statically. */
6358 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6359 if (dyn
6360 || h->type == STT_GNU_IFUNC
6361 || (h->needs_plt && h->dynamic_adjusted)
6362 || (h->needs_plt
6363 && h->def_regular
6364 && !htab->elf.dynamic_sections_created
6365 && !htab->can_convert_all_inline_plt
6366 && (ppc_elf_hash_entry (h)->tls_mask
6367 & (TLS_TLS | PLT_KEEP)) == PLT_KEEP))
6368 {
6369 struct plt_entry *ent;
6370 bfd_boolean doneone = FALSE;
6371 bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
6372
6373 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6374 if (ent->plt.refcount > 0)
6375 {
6376 asection *s = htab->elf.splt;
6377
6378 if (!dyn)
6379 {
6380 if (h->type == STT_GNU_IFUNC)
6381 s = htab->elf.iplt;
6382 else
6383 s = htab->pltlocal;
6384 }
6385
6386 if (htab->plt_type == PLT_NEW || !dyn)
6387 {
6388 if (!doneone)
6389 {
6390 plt_offset = s->size;
6391 s->size += 4;
6392 }
6393 ent->plt.offset = plt_offset;
6394
6395 if (s == htab->pltlocal)
6396 ent->glink_offset = glink_offset;
6397 else
6398 {
6399 s = htab->glink;
6400 if (!doneone || bfd_link_pic (info))
6401 {
6402 glink_offset = s->size;
6403 s->size += GLINK_ENTRY_SIZE (htab, h);
6404 }
6405 if (!doneone
6406 && !bfd_link_pic (info)
6407 && h->def_dynamic
6408 && !h->def_regular)
6409 {
6410 h->root.u.def.section = s;
6411 h->root.u.def.value = glink_offset;
6412 }
6413 ent->glink_offset = glink_offset;
6414
6415 if (htab->params->emit_stub_syms
6416 && !add_stub_sym (ent, h, info))
6417 return FALSE;
6418 }
6419 }
6420 else
6421 {
6422 if (!doneone)
6423 {
6424 /* If this is the first .plt entry, make room
6425 for the special first entry. */
6426 if (s->size == 0)
6427 s->size += htab->plt_initial_entry_size;
6428
6429 /* The PowerPC PLT is actually composed of two
6430 parts, the first part is 2 words (for a load
6431 and a jump), and then there is a remaining
6432 word available at the end. */
6433 plt_offset = (htab->plt_initial_entry_size
6434 + (htab->plt_slot_size
6435 * ((s->size
6436 - htab->plt_initial_entry_size)
6437 / htab->plt_entry_size)));
6438
6439 /* If this symbol is not defined in a regular
6440 file, and we are not generating a shared
6441 library, then set the symbol to this location
6442 in the .plt. This is to avoid text
6443 relocations, and is required to make
6444 function pointers compare as equal between
6445 the normal executable and the shared library. */
6446 if (! bfd_link_pic (info)
6447 && h->def_dynamic
6448 && !h->def_regular)
6449 {
6450 h->root.u.def.section = s;
6451 h->root.u.def.value = plt_offset;
6452 }
6453
6454 /* Make room for this entry. */
6455 s->size += htab->plt_entry_size;
6456 /* After the 8192nd entry, room for two entries
6457 is allocated. */
6458 if (htab->plt_type == PLT_OLD
6459 && (s->size - htab->plt_initial_entry_size)
6460 / htab->plt_entry_size
6461 > PLT_NUM_SINGLE_ENTRIES)
6462 s->size += htab->plt_entry_size;
6463 }
6464 ent->plt.offset = plt_offset;
6465 }
6466
6467 /* We also need to make an entry in the .rela.plt section. */
6468 if (!doneone)
6469 {
6470 if (!dyn)
6471 {
6472 if (h->type == STT_GNU_IFUNC)
6473 {
6474 s = htab->elf.irelplt;
6475 s->size += sizeof (Elf32_External_Rela);
6476 }
6477 else if (bfd_link_pic (info))
6478 {
6479 s = htab->relpltlocal;
6480 s->size += sizeof (Elf32_External_Rela);
6481 }
6482 }
6483 else
6484 {
6485 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6486
6487 if (htab->plt_type == PLT_VXWORKS)
6488 {
6489 /* Allocate space for the unloaded relocations. */
6490 if (!bfd_link_pic (info)
6491 && htab->elf.dynamic_sections_created)
6492 {
6493 if (ent->plt.offset
6494 == (bfd_vma) htab->plt_initial_entry_size)
6495 {
6496 htab->srelplt2->size
6497 += (sizeof (Elf32_External_Rela)
6498 * VXWORKS_PLTRESOLVE_RELOCS);
6499 }
6500
6501 htab->srelplt2->size
6502 += (sizeof (Elf32_External_Rela)
6503 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6504 }
6505
6506 /* Every PLT entry has an associated GOT entry in
6507 .got.plt. */
6508 htab->elf.sgotplt->size += 4;
6509 }
6510 }
6511 doneone = TRUE;
6512 }
6513 }
6514 else
6515 ent->plt.offset = (bfd_vma) -1;
6516
6517 if (!doneone)
6518 {
6519 h->plt.plist = NULL;
6520 h->needs_plt = 0;
6521 }
6522 }
6523 else
6524 {
6525 h->plt.plist = NULL;
6526 h->needs_plt = 0;
6527 }
6528
6529 return TRUE;
6530 }
6531
6532 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6533 read-only sections. */
6534
6535 static bfd_boolean
6536 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6537 {
6538 asection *sec;
6539
6540 if (h->root.type == bfd_link_hash_indirect)
6541 return TRUE;
6542
6543 sec = readonly_dynrelocs (h);
6544 if (sec != NULL)
6545 {
6546 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
6547
6548 info->flags |= DF_TEXTREL;
6549 info->callbacks->minfo
6550 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
6551 sec->owner, h->root.root.string, sec);
6552
6553 /* Not an error, just cut short the traversal. */
6554 return FALSE;
6555 }
6556 return TRUE;
6557 }
6558
6559 static const unsigned char glink_eh_frame_cie[] =
6560 {
6561 0, 0, 0, 16, /* length. */
6562 0, 0, 0, 0, /* id. */
6563 1, /* CIE version. */
6564 'z', 'R', 0, /* Augmentation string. */
6565 4, /* Code alignment. */
6566 0x7c, /* Data alignment. */
6567 65, /* RA reg. */
6568 1, /* Augmentation size. */
6569 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6570 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6571 };
6572
6573 /* Set the sizes of the dynamic sections. */
6574
6575 static bfd_boolean
6576 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6577 struct bfd_link_info *info)
6578 {
6579 struct ppc_elf_link_hash_table *htab;
6580 asection *s;
6581 bfd_boolean relocs;
6582 bfd *ibfd;
6583
6584 #ifdef DEBUG
6585 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6586 #endif
6587
6588 htab = ppc_elf_hash_table (info);
6589 BFD_ASSERT (htab->elf.dynobj != NULL);
6590
6591 if (elf_hash_table (info)->dynamic_sections_created)
6592 {
6593 /* Set the contents of the .interp section to the interpreter. */
6594 if (bfd_link_executable (info) && !info->nointerp)
6595 {
6596 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6597 BFD_ASSERT (s != NULL);
6598 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6599 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6600 }
6601 }
6602
6603 if (htab->plt_type == PLT_OLD)
6604 htab->got_header_size = 16;
6605 else if (htab->plt_type == PLT_NEW)
6606 htab->got_header_size = 12;
6607
6608 /* Set up .got offsets for local syms, and space for local dynamic
6609 relocs. */
6610 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6611 {
6612 bfd_signed_vma *local_got;
6613 bfd_signed_vma *end_local_got;
6614 struct plt_entry **local_plt;
6615 struct plt_entry **end_local_plt;
6616 char *lgot_masks;
6617 bfd_size_type locsymcount;
6618 Elf_Internal_Shdr *symtab_hdr;
6619
6620 if (!is_ppc_elf (ibfd))
6621 continue;
6622
6623 for (s = ibfd->sections; s != NULL; s = s->next)
6624 {
6625 struct ppc_dyn_relocs *p;
6626
6627 for (p = ((struct ppc_dyn_relocs *)
6628 elf_section_data (s)->local_dynrel);
6629 p != NULL;
6630 p = p->next)
6631 {
6632 if (!bfd_is_abs_section (p->sec)
6633 && bfd_is_abs_section (p->sec->output_section))
6634 {
6635 /* Input section has been discarded, either because
6636 it is a copy of a linkonce section or due to
6637 linker script /DISCARD/, so we'll be discarding
6638 the relocs too. */
6639 }
6640 else if (htab->is_vxworks
6641 && strcmp (p->sec->output_section->name,
6642 ".tls_vars") == 0)
6643 {
6644 /* Relocations in vxworks .tls_vars sections are
6645 handled specially by the loader. */
6646 }
6647 else if (p->count != 0)
6648 {
6649 asection *sreloc = elf_section_data (p->sec)->sreloc;
6650 if (p->ifunc)
6651 sreloc = htab->elf.irelplt;
6652 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6653 if ((p->sec->output_section->flags
6654 & (SEC_READONLY | SEC_ALLOC))
6655 == (SEC_READONLY | SEC_ALLOC))
6656 {
6657 info->flags |= DF_TEXTREL;
6658 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
6659 p->sec->owner, p->sec);
6660 }
6661 }
6662 }
6663 }
6664
6665 local_got = elf_local_got_refcounts (ibfd);
6666 if (!local_got)
6667 continue;
6668
6669 symtab_hdr = &elf_symtab_hdr (ibfd);
6670 locsymcount = symtab_hdr->sh_info;
6671 end_local_got = local_got + locsymcount;
6672 local_plt = (struct plt_entry **) end_local_got;
6673 end_local_plt = local_plt + locsymcount;
6674 lgot_masks = (char *) end_local_plt;
6675
6676 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6677 if (*local_got > 0)
6678 {
6679 unsigned int need;
6680 if ((*lgot_masks & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
6681 htab->tlsld_got.refcount += 1;
6682 need = got_entries_needed (*lgot_masks);
6683 if (need == 0)
6684 *local_got = (bfd_vma) -1;
6685 else
6686 {
6687 *local_got = allocate_got (htab, need);
6688 if (bfd_link_pic (info))
6689 {
6690 asection *srel;
6691 bfd_boolean tprel_known = bfd_link_executable (info);
6692
6693 need = got_relocs_needed (*lgot_masks, need, tprel_known);
6694 srel = htab->elf.srelgot;
6695 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6696 srel = htab->elf.irelplt;
6697 srel->size += need;
6698 }
6699 }
6700 }
6701 else
6702 *local_got = (bfd_vma) -1;
6703
6704 if (htab->is_vxworks)
6705 continue;
6706
6707 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6708 lgot_masks = (char *) end_local_plt;
6709 for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks)
6710 {
6711 struct plt_entry *ent;
6712 bfd_boolean doneone = FALSE;
6713 bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
6714
6715 for (ent = *local_plt; ent != NULL; ent = ent->next)
6716 if (ent->plt.refcount > 0)
6717 {
6718 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6719 s = htab->elf.iplt;
6720 else if (htab->can_convert_all_inline_plt
6721 || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)
6722 {
6723 ent->plt.offset = (bfd_vma) -1;
6724 continue;
6725 }
6726 else
6727 s = htab->pltlocal;
6728
6729 if (!doneone)
6730 {
6731 plt_offset = s->size;
6732 s->size += 4;
6733 }
6734 ent->plt.offset = plt_offset;
6735
6736 if (s != htab->pltlocal && (!doneone || bfd_link_pic (info)))
6737 {
6738 s = htab->glink;
6739 glink_offset = s->size;
6740 s->size += GLINK_ENTRY_SIZE (htab, NULL);
6741 }
6742 ent->glink_offset = glink_offset;
6743
6744 if (!doneone)
6745 {
6746 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6747 {
6748 s = htab->elf.irelplt;
6749 s->size += sizeof (Elf32_External_Rela);
6750 }
6751 else if (bfd_link_pic (info))
6752 {
6753 s = htab->relpltlocal;
6754 s->size += sizeof (Elf32_External_Rela);
6755 }
6756 doneone = TRUE;
6757 }
6758 }
6759 else
6760 ent->plt.offset = (bfd_vma) -1;
6761 }
6762 }
6763
6764 /* Allocate space for global sym dynamic relocs. */
6765 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6766
6767 if (htab->tlsld_got.refcount > 0)
6768 {
6769 htab->tlsld_got.offset = allocate_got (htab, 8);
6770 if (bfd_link_pic (info))
6771 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6772 }
6773 else
6774 htab->tlsld_got.offset = (bfd_vma) -1;
6775
6776 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6777 {
6778 unsigned int g_o_t = 32768;
6779
6780 /* If we haven't allocated the header, do so now. When we get here,
6781 for old plt/got the got size will be 0 to 32764 (not allocated),
6782 or 32780 to 65536 (header allocated). For new plt/got, the
6783 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6784 if (htab->elf.sgot->size <= 32768)
6785 {
6786 g_o_t = htab->elf.sgot->size;
6787 if (htab->plt_type == PLT_OLD)
6788 g_o_t += 4;
6789 htab->elf.sgot->size += htab->got_header_size;
6790 }
6791
6792 htab->elf.hgot->root.u.def.value = g_o_t;
6793 }
6794 if (bfd_link_pic (info))
6795 {
6796 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6797
6798 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6799 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6800 }
6801 if (info->emitrelocations)
6802 {
6803 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6804
6805 if (sda != NULL && sda->ref_regular)
6806 sda->root.u.def.section->flags |= SEC_KEEP;
6807 sda = htab->sdata[1].sym;
6808 if (sda != NULL && sda->ref_regular)
6809 sda->root.u.def.section->flags |= SEC_KEEP;
6810 }
6811
6812 if (htab->glink != NULL
6813 && htab->glink->size != 0
6814 && htab->elf.dynamic_sections_created)
6815 {
6816 htab->glink_pltresolve = htab->glink->size;
6817 /* Space for the branch table. */
6818 htab->glink->size
6819 += htab->elf.srelplt->size / (sizeof (Elf32_External_Rela) / 4) - 4;
6820 /* Pad out to align the start of PLTresolve. */
6821 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6822 ? 63 : 15);
6823 htab->glink->size += GLINK_PLTRESOLVE;
6824
6825 if (htab->params->emit_stub_syms)
6826 {
6827 struct elf_link_hash_entry *sh;
6828 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6829 TRUE, FALSE, FALSE);
6830 if (sh == NULL)
6831 return FALSE;
6832 if (sh->root.type == bfd_link_hash_new)
6833 {
6834 sh->root.type = bfd_link_hash_defined;
6835 sh->root.u.def.section = htab->glink;
6836 sh->root.u.def.value = htab->glink_pltresolve;
6837 sh->ref_regular = 1;
6838 sh->def_regular = 1;
6839 sh->ref_regular_nonweak = 1;
6840 sh->forced_local = 1;
6841 sh->non_elf = 0;
6842 sh->root.linker_def = 1;
6843 }
6844 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6845 TRUE, FALSE, FALSE);
6846 if (sh == NULL)
6847 return FALSE;
6848 if (sh->root.type == bfd_link_hash_new)
6849 {
6850 sh->root.type = bfd_link_hash_defined;
6851 sh->root.u.def.section = htab->glink;
6852 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6853 sh->ref_regular = 1;
6854 sh->def_regular = 1;
6855 sh->ref_regular_nonweak = 1;
6856 sh->forced_local = 1;
6857 sh->non_elf = 0;
6858 sh->root.linker_def = 1;
6859 }
6860 }
6861 }
6862
6863 if (htab->glink != NULL
6864 && htab->glink->size != 0
6865 && htab->glink_eh_frame != NULL
6866 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6867 && _bfd_elf_eh_frame_present (info))
6868 {
6869 s = htab->glink_eh_frame;
6870 s->size = sizeof (glink_eh_frame_cie) + 20;
6871 if (bfd_link_pic (info))
6872 {
6873 s->size += 4;
6874 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6875 s->size += 4;
6876 }
6877 }
6878
6879 /* We've now determined the sizes of the various dynamic sections.
6880 Allocate memory for them. */
6881 relocs = FALSE;
6882 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6883 {
6884 bfd_boolean strip_section = TRUE;
6885
6886 if ((s->flags & SEC_LINKER_CREATED) == 0)
6887 continue;
6888
6889 if (s == htab->elf.splt
6890 || s == htab->elf.sgot)
6891 {
6892 /* We'd like to strip these sections if they aren't needed, but if
6893 we've exported dynamic symbols from them we must leave them.
6894 It's too late to tell BFD to get rid of the symbols. */
6895 if (htab->elf.hplt != NULL)
6896 strip_section = FALSE;
6897 /* Strip this section if we don't need it; see the
6898 comment below. */
6899 }
6900 else if (s == htab->elf.iplt
6901 || s == htab->pltlocal
6902 || s == htab->glink
6903 || s == htab->glink_eh_frame
6904 || s == htab->elf.sgotplt
6905 || s == htab->sbss
6906 || s == htab->elf.sdynbss
6907 || s == htab->elf.sdynrelro
6908 || s == htab->dynsbss)
6909 {
6910 /* Strip these too. */
6911 }
6912 else if (s == htab->sdata[0].section
6913 || s == htab->sdata[1].section)
6914 {
6915 strip_section = (s->flags & SEC_KEEP) == 0;
6916 }
6917 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6918 ".rela"))
6919 {
6920 if (s->size != 0)
6921 {
6922 /* Remember whether there are any relocation sections. */
6923 relocs = TRUE;
6924
6925 /* We use the reloc_count field as a counter if we need
6926 to copy relocs into the output file. */
6927 s->reloc_count = 0;
6928 }
6929 }
6930 else
6931 {
6932 /* It's not one of our sections, so don't allocate space. */
6933 continue;
6934 }
6935
6936 if (s->size == 0 && strip_section)
6937 {
6938 /* If we don't need this section, strip it from the
6939 output file. This is mostly to handle .rela.bss and
6940 .rela.plt. We must create both sections in
6941 create_dynamic_sections, because they must be created
6942 before the linker maps input sections to output
6943 sections. The linker does that before
6944 adjust_dynamic_symbol is called, and it is that
6945 function which decides whether anything needs to go
6946 into these sections. */
6947 s->flags |= SEC_EXCLUDE;
6948 continue;
6949 }
6950
6951 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6952 continue;
6953
6954 /* Allocate memory for the section contents. */
6955 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6956 if (s->contents == NULL)
6957 return FALSE;
6958 }
6959
6960 if (htab->elf.dynamic_sections_created)
6961 {
6962 /* Add some entries to the .dynamic section. We fill in the
6963 values later, in ppc_elf_finish_dynamic_sections, but we
6964 must add the entries now so that we get the correct size for
6965 the .dynamic section. The DT_DEBUG entry is filled in by the
6966 dynamic linker and used by the debugger. */
6967 #define add_dynamic_entry(TAG, VAL) \
6968 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6969
6970 if (bfd_link_executable (info))
6971 {
6972 if (!add_dynamic_entry (DT_DEBUG, 0))
6973 return FALSE;
6974 }
6975
6976 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6977 {
6978 if (!add_dynamic_entry (DT_PLTGOT, 0)
6979 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6980 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6981 || !add_dynamic_entry (DT_JMPREL, 0))
6982 return FALSE;
6983 }
6984
6985 if (htab->plt_type == PLT_NEW
6986 && htab->glink != NULL
6987 && htab->glink->size != 0)
6988 {
6989 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6990 return FALSE;
6991 if (!htab->params->no_tls_get_addr_opt
6992 && htab->tls_get_addr != NULL
6993 && htab->tls_get_addr->plt.plist != NULL
6994 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6995 return FALSE;
6996 }
6997
6998 if (relocs)
6999 {
7000 if (!add_dynamic_entry (DT_RELA, 0)
7001 || !add_dynamic_entry (DT_RELASZ, 0)
7002 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
7003 return FALSE;
7004 }
7005
7006 /* If any dynamic relocs apply to a read-only section, then we
7007 need a DT_TEXTREL entry. */
7008 if ((info->flags & DF_TEXTREL) == 0)
7009 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
7010 info);
7011
7012 if ((info->flags & DF_TEXTREL) != 0)
7013 {
7014 if (!add_dynamic_entry (DT_TEXTREL, 0))
7015 return FALSE;
7016 }
7017 if (htab->is_vxworks
7018 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
7019 return FALSE;
7020 }
7021 #undef add_dynamic_entry
7022
7023 if (htab->glink_eh_frame != NULL
7024 && htab->glink_eh_frame->contents != NULL)
7025 {
7026 unsigned char *p = htab->glink_eh_frame->contents;
7027 bfd_vma val;
7028
7029 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
7030 /* CIE length (rewrite in case little-endian). */
7031 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
7032 p += sizeof (glink_eh_frame_cie);
7033 /* FDE length. */
7034 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
7035 bfd_put_32 (htab->elf.dynobj, val, p);
7036 p += 4;
7037 /* CIE pointer. */
7038 val = p - htab->glink_eh_frame->contents;
7039 bfd_put_32 (htab->elf.dynobj, val, p);
7040 p += 4;
7041 /* Offset to .glink. Set later. */
7042 p += 4;
7043 /* .glink size. */
7044 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
7045 p += 4;
7046 /* Augmentation. */
7047 p += 1;
7048
7049 if (bfd_link_pic (info)
7050 && htab->elf.dynamic_sections_created)
7051 {
7052 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
7053 if (adv < 64)
7054 *p++ = DW_CFA_advance_loc + adv;
7055 else if (adv < 256)
7056 {
7057 *p++ = DW_CFA_advance_loc1;
7058 *p++ = adv;
7059 }
7060 else if (adv < 65536)
7061 {
7062 *p++ = DW_CFA_advance_loc2;
7063 bfd_put_16 (htab->elf.dynobj, adv, p);
7064 p += 2;
7065 }
7066 else
7067 {
7068 *p++ = DW_CFA_advance_loc4;
7069 bfd_put_32 (htab->elf.dynobj, adv, p);
7070 p += 4;
7071 }
7072 *p++ = DW_CFA_register;
7073 *p++ = 65;
7074 p++;
7075 *p++ = DW_CFA_advance_loc + 4;
7076 *p++ = DW_CFA_restore_extended;
7077 *p++ = 65;
7078 }
7079 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
7080 == htab->glink_eh_frame->size);
7081 }
7082
7083 return TRUE;
7084 }
7085
7086 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
7087 if it looks like nothing is using them. */
7088
7089 static void
7090 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
7091 {
7092 struct elf_link_hash_entry *sda = lsect->sym;
7093
7094 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
7095 {
7096 asection *s;
7097
7098 s = bfd_get_section_by_name (output_bfd, lsect->name);
7099 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
7100 {
7101 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
7102 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
7103 {
7104 sda->def_regular = 0;
7105 /* This is somewhat magic. See elf_link_output_extsym. */
7106 sda->ref_dynamic = 1;
7107 sda->forced_local = 0;
7108 }
7109 }
7110 }
7111 }
7112
7113 void
7114 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
7115 {
7116 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7117
7118 if (htab != NULL)
7119 {
7120 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
7121 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
7122 }
7123 }
7124
7125
7126 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
7127
7128 static bfd_boolean
7129 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
7130 {
7131 if (h->plt.plist != NULL
7132 && !h->def_regular
7133 && (!h->pointer_equality_needed
7134 || !h->ref_regular_nonweak))
7135 return FALSE;
7136
7137 return _bfd_elf_hash_symbol (h);
7138 }
7139 \f
7140 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
7141
7142 /* Relaxation trampolines. r12 is available for clobbering (r11, is
7143 used for some functions that are allowed to break the ABI). */
7144 static const int shared_stub_entry[] =
7145 {
7146 0x7c0802a6, /* mflr 0 */
7147 0x429f0005, /* bcl 20, 31, .Lxxx */
7148 0x7d8802a6, /* mflr 12 */
7149 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
7150 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
7151 0x7c0803a6, /* mtlr 0 */
7152 0x7d8903a6, /* mtctr 12 */
7153 0x4e800420, /* bctr */
7154 };
7155
7156 static const int stub_entry[] =
7157 {
7158 0x3d800000, /* lis 12,xxx@ha */
7159 0x398c0000, /* addi 12,12,xxx@l */
7160 0x7d8903a6, /* mtctr 12 */
7161 0x4e800420, /* bctr */
7162 };
7163
7164 struct ppc_elf_relax_info
7165 {
7166 unsigned int workaround_size;
7167 unsigned int picfixup_size;
7168 };
7169
7170 /* This function implements long branch trampolines, and the ppc476
7171 icache bug workaround. Any section needing trampolines or patch
7172 space for the workaround has its size extended so that we can
7173 add trampolines at the end of the section. */
7174
7175 static bfd_boolean
7176 ppc_elf_relax_section (bfd *abfd,
7177 asection *isec,
7178 struct bfd_link_info *link_info,
7179 bfd_boolean *again)
7180 {
7181 struct one_branch_fixup
7182 {
7183 struct one_branch_fixup *next;
7184 asection *tsec;
7185 /* Final link, can use the symbol offset. For a
7186 relocatable link we use the symbol's index. */
7187 bfd_vma toff;
7188 bfd_vma trampoff;
7189 };
7190
7191 Elf_Internal_Shdr *symtab_hdr;
7192 bfd_byte *contents = NULL;
7193 Elf_Internal_Sym *isymbuf = NULL;
7194 Elf_Internal_Rela *internal_relocs = NULL;
7195 Elf_Internal_Rela *irel, *irelend = NULL;
7196 struct one_branch_fixup *branch_fixups = NULL;
7197 struct ppc_elf_relax_info *relax_info = NULL;
7198 unsigned changes = 0;
7199 bfd_boolean workaround_change;
7200 struct ppc_elf_link_hash_table *htab;
7201 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
7202 asection *got2;
7203 bfd_boolean maybe_pasted;
7204
7205 *again = FALSE;
7206
7207 /* No need to do anything with non-alloc or non-code sections. */
7208 if ((isec->flags & SEC_ALLOC) == 0
7209 || (isec->flags & SEC_CODE) == 0
7210 || (isec->flags & SEC_LINKER_CREATED) != 0
7211 || isec->size < 4)
7212 return TRUE;
7213
7214 /* We cannot represent the required PIC relocs in the output, so don't
7215 do anything. The linker doesn't support mixing -shared and -r
7216 anyway. */
7217 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
7218 return TRUE;
7219
7220 htab = ppc_elf_hash_table (link_info);
7221 if (htab == NULL)
7222 return TRUE;
7223
7224 isec->size = (isec->size + 3) & -4;
7225 if (isec->rawsize == 0)
7226 isec->rawsize = isec->size;
7227 trampbase = isec->size;
7228
7229 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
7230 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
7231 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
7232
7233 if (htab->params->ppc476_workaround
7234 || htab->params->pic_fixup > 0)
7235 {
7236 if (elf_section_data (isec)->sec_info == NULL)
7237 {
7238 elf_section_data (isec)->sec_info
7239 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
7240 if (elf_section_data (isec)->sec_info == NULL)
7241 return FALSE;
7242 }
7243 relax_info = elf_section_data (isec)->sec_info;
7244 trampbase -= relax_info->workaround_size;
7245 }
7246
7247 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
7248 || strcmp (isec->output_section->name, ".fini") == 0);
7249 /* Space for a branch around any trampolines. */
7250 trampoff = trampbase;
7251 if (maybe_pasted && trampbase == isec->rawsize)
7252 trampoff += 4;
7253
7254 symtab_hdr = &elf_symtab_hdr (abfd);
7255 picfixup_size = 0;
7256 if (htab->params->branch_trampolines
7257 || htab->params->pic_fixup > 0)
7258 {
7259 /* Get a copy of the native relocations. */
7260 if (isec->reloc_count != 0)
7261 {
7262 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
7263 link_info->keep_memory);
7264 if (internal_relocs == NULL)
7265 goto error_return;
7266 }
7267
7268 got2 = bfd_get_section_by_name (abfd, ".got2");
7269
7270 irelend = internal_relocs + isec->reloc_count;
7271 for (irel = internal_relocs; irel < irelend; irel++)
7272 {
7273 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7274 bfd_vma toff, roff;
7275 asection *tsec;
7276 struct one_branch_fixup *f;
7277 size_t insn_offset = 0;
7278 bfd_vma max_branch_offset = 0, val;
7279 bfd_byte *hit_addr;
7280 unsigned long t0;
7281 struct elf_link_hash_entry *h;
7282 Elf_Internal_Sym *isym;
7283 struct plt_entry **plist;
7284 unsigned char sym_type;
7285
7286 switch (r_type)
7287 {
7288 case R_PPC_REL24:
7289 case R_PPC_LOCAL24PC:
7290 case R_PPC_PLTREL24:
7291 case R_PPC_PLTCALL:
7292 max_branch_offset = 1 << 25;
7293 break;
7294
7295 case R_PPC_REL14:
7296 case R_PPC_REL14_BRTAKEN:
7297 case R_PPC_REL14_BRNTAKEN:
7298 max_branch_offset = 1 << 15;
7299 break;
7300
7301 case R_PPC_ADDR16_HA:
7302 if (htab->params->pic_fixup > 0)
7303 break;
7304 continue;
7305
7306 default:
7307 continue;
7308 }
7309
7310 /* Get the value of the symbol referred to by the reloc. */
7311 if (!get_sym_h (&h, &isym, &tsec, NULL, &isymbuf,
7312 ELF32_R_SYM (irel->r_info), abfd))
7313 goto error_return;
7314
7315 if (isym != NULL)
7316 {
7317 if (tsec != NULL)
7318 ;
7319 else if (isym->st_shndx == SHN_UNDEF)
7320 tsec = bfd_und_section_ptr;
7321 else if (isym->st_shndx == SHN_ABS)
7322 tsec = bfd_abs_section_ptr;
7323 else if (isym->st_shndx == SHN_COMMON)
7324 tsec = bfd_com_section_ptr;
7325
7326 toff = isym->st_value;
7327 sym_type = ELF_ST_TYPE (isym->st_info);
7328 }
7329 else
7330 {
7331 if (tsec != NULL)
7332 toff = h->root.u.def.value;
7333 else if (h->root.type == bfd_link_hash_undefined
7334 || h->root.type == bfd_link_hash_undefweak)
7335 {
7336 unsigned long indx;
7337
7338 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7339 tsec = bfd_und_section_ptr;
7340 toff = bfd_link_relocatable (link_info) ? indx : 0;
7341 }
7342 else
7343 continue;
7344
7345 /* If this branch is to __tls_get_addr then we may later
7346 optimise away the call. We won't be needing a long-
7347 branch stub in that case. */
7348 if (bfd_link_executable (link_info)
7349 && h == htab->tls_get_addr
7350 && irel != internal_relocs)
7351 {
7352 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7353 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7354 unsigned int tls_mask = 0;
7355
7356 /* The previous reloc should be one of R_PPC_TLSGD or
7357 R_PPC_TLSLD, or for older object files, a reloc
7358 on the __tls_get_addr arg setup insn. Get tls
7359 mask bits from the symbol on that reloc. */
7360 if (t_symndx < symtab_hdr->sh_info)
7361 {
7362 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7363
7364 if (local_got_offsets != NULL)
7365 {
7366 struct plt_entry **local_plt = (struct plt_entry **)
7367 (local_got_offsets + symtab_hdr->sh_info);
7368 char *lgot_masks = (char *)
7369 (local_plt + symtab_hdr->sh_info);
7370 tls_mask = lgot_masks[t_symndx];
7371 }
7372 }
7373 else
7374 {
7375 struct elf_link_hash_entry *th
7376 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7377
7378 while (th->root.type == bfd_link_hash_indirect
7379 || th->root.type == bfd_link_hash_warning)
7380 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7381
7382 tls_mask
7383 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7384 }
7385
7386 /* The mask bits tell us if the call will be
7387 optimised away. */
7388 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7389 && (t_rtype == R_PPC_TLSGD
7390 || t_rtype == R_PPC_GOT_TLSGD16
7391 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7392 continue;
7393 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7394 && (t_rtype == R_PPC_TLSLD
7395 || t_rtype == R_PPC_GOT_TLSLD16
7396 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7397 continue;
7398 }
7399
7400 sym_type = h->type;
7401 }
7402
7403 if (r_type == R_PPC_ADDR16_HA)
7404 {
7405 if (h != NULL
7406 && !h->def_regular
7407 && h->protected_def
7408 && ppc_elf_hash_entry (h)->has_addr16_ha
7409 && ppc_elf_hash_entry (h)->has_addr16_lo)
7410 picfixup_size += 12;
7411 continue;
7412 }
7413
7414 /* The condition here under which we call find_plt_ent must
7415 match that in relocate_section. If we call find_plt_ent here
7416 but not in relocate_section, or vice versa, then the branch
7417 destination used here may be incorrect. */
7418 plist = NULL;
7419 if (h != NULL)
7420 {
7421 /* We know is_branch_reloc (r_type) is true. */
7422 if (h->type == STT_GNU_IFUNC
7423 || r_type == R_PPC_PLTREL24)
7424 plist = &h->plt.plist;
7425 }
7426 else if (sym_type == STT_GNU_IFUNC
7427 && elf_local_got_offsets (abfd) != NULL)
7428 {
7429 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7430 struct plt_entry **local_plt = (struct plt_entry **)
7431 (local_got_offsets + symtab_hdr->sh_info);
7432 plist = local_plt + ELF32_R_SYM (irel->r_info);
7433 }
7434 if (plist != NULL)
7435 {
7436 bfd_vma addend = 0;
7437 struct plt_entry *ent;
7438
7439 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7440 addend = irel->r_addend;
7441 ent = find_plt_ent (plist, got2, addend);
7442 if (ent != NULL)
7443 {
7444 if (htab->plt_type == PLT_NEW
7445 || h == NULL
7446 || !htab->elf.dynamic_sections_created
7447 || h->dynindx == -1)
7448 {
7449 tsec = htab->glink;
7450 toff = ent->glink_offset;
7451 }
7452 else
7453 {
7454 tsec = htab->elf.splt;
7455 toff = ent->plt.offset;
7456 }
7457 }
7458 }
7459
7460 /* If the branch and target are in the same section, you have
7461 no hope of adding stubs. We'll error out later should the
7462 branch overflow. */
7463 if (tsec == isec)
7464 continue;
7465
7466 /* There probably isn't any reason to handle symbols in
7467 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7468 attribute for a code section, and we are only looking at
7469 branches. However, implement it correctly here as a
7470 reference for other target relax_section functions. */
7471 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7472 {
7473 /* At this stage in linking, no SEC_MERGE symbol has been
7474 adjusted, so all references to such symbols need to be
7475 passed through _bfd_merged_section_offset. (Later, in
7476 relocate_section, all SEC_MERGE symbols *except* for
7477 section symbols have been adjusted.)
7478
7479 gas may reduce relocations against symbols in SEC_MERGE
7480 sections to a relocation against the section symbol when
7481 the original addend was zero. When the reloc is against
7482 a section symbol we should include the addend in the
7483 offset passed to _bfd_merged_section_offset, since the
7484 location of interest is the original symbol. On the
7485 other hand, an access to "sym+addend" where "sym" is not
7486 a section symbol should not include the addend; Such an
7487 access is presumed to be an offset from "sym"; The
7488 location of interest is just "sym". */
7489 if (sym_type == STT_SECTION)
7490 toff += irel->r_addend;
7491
7492 toff
7493 = _bfd_merged_section_offset (abfd, &tsec,
7494 elf_section_data (tsec)->sec_info,
7495 toff);
7496
7497 if (sym_type != STT_SECTION)
7498 toff += irel->r_addend;
7499 }
7500 /* PLTREL24 addends are special. */
7501 else if (r_type != R_PPC_PLTREL24)
7502 toff += irel->r_addend;
7503
7504 /* Attempted -shared link of non-pic code loses. */
7505 if ((!bfd_link_relocatable (link_info)
7506 && tsec == bfd_und_section_ptr)
7507 || tsec->output_section == NULL
7508 || (tsec->owner != NULL
7509 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7510 continue;
7511
7512 roff = irel->r_offset;
7513
7514 /* If the branch is in range, no need to do anything. */
7515 if (tsec != bfd_und_section_ptr
7516 && (!bfd_link_relocatable (link_info)
7517 /* A relocatable link may have sections moved during
7518 final link, so do not presume they remain in range. */
7519 || tsec->output_section == isec->output_section))
7520 {
7521 bfd_vma symaddr, reladdr;
7522
7523 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7524 reladdr = isec->output_section->vma + isec->output_offset + roff;
7525 if (symaddr - reladdr + max_branch_offset
7526 < 2 * max_branch_offset)
7527 continue;
7528 }
7529
7530 /* Look for an existing fixup to this address. */
7531 for (f = branch_fixups; f ; f = f->next)
7532 if (f->tsec == tsec && f->toff == toff)
7533 break;
7534
7535 if (f == NULL)
7536 {
7537 size_t size;
7538 unsigned long stub_rtype;
7539
7540 val = trampoff - roff;
7541 if (val >= max_branch_offset)
7542 /* Oh dear, we can't reach a trampoline. Don't try to add
7543 one. We'll report an error later. */
7544 continue;
7545
7546 if (bfd_link_pic (link_info))
7547 {
7548 size = 4 * ARRAY_SIZE (shared_stub_entry);
7549 insn_offset = 12;
7550 }
7551 else
7552 {
7553 size = 4 * ARRAY_SIZE (stub_entry);
7554 insn_offset = 0;
7555 }
7556 stub_rtype = R_PPC_RELAX;
7557 if (tsec == htab->elf.splt
7558 || tsec == htab->glink)
7559 {
7560 stub_rtype = R_PPC_RELAX_PLT;
7561 if (r_type == R_PPC_PLTREL24)
7562 stub_rtype = R_PPC_RELAX_PLTREL24;
7563 }
7564
7565 /* Hijack the old relocation. Since we need two
7566 relocations for this use a "composite" reloc. */
7567 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7568 stub_rtype);
7569 irel->r_offset = trampoff + insn_offset;
7570 if (r_type == R_PPC_PLTREL24
7571 && stub_rtype != R_PPC_RELAX_PLTREL24)
7572 irel->r_addend = 0;
7573
7574 /* Record the fixup so we don't do it again this section. */
7575 f = bfd_malloc (sizeof (*f));
7576 f->next = branch_fixups;
7577 f->tsec = tsec;
7578 f->toff = toff;
7579 f->trampoff = trampoff;
7580 branch_fixups = f;
7581
7582 trampoff += size;
7583 changes++;
7584 }
7585 else
7586 {
7587 val = f->trampoff - roff;
7588 if (val >= max_branch_offset)
7589 continue;
7590
7591 /* Nop out the reloc, since we're finalizing things here. */
7592 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7593 }
7594
7595 /* Get the section contents. */
7596 if (contents == NULL)
7597 {
7598 /* Get cached copy if it exists. */
7599 if (elf_section_data (isec)->this_hdr.contents != NULL)
7600 contents = elf_section_data (isec)->this_hdr.contents;
7601 /* Go get them off disk. */
7602 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7603 goto error_return;
7604 }
7605
7606 /* Fix up the existing branch to hit the trampoline. */
7607 hit_addr = contents + roff;
7608 switch (r_type)
7609 {
7610 case R_PPC_REL24:
7611 case R_PPC_LOCAL24PC:
7612 case R_PPC_PLTREL24:
7613 t0 = bfd_get_32 (abfd, hit_addr);
7614 t0 &= ~0x3fffffc;
7615 t0 |= val & 0x3fffffc;
7616 bfd_put_32 (abfd, t0, hit_addr);
7617 break;
7618
7619 case R_PPC_REL14:
7620 case R_PPC_REL14_BRTAKEN:
7621 case R_PPC_REL14_BRNTAKEN:
7622 t0 = bfd_get_32 (abfd, hit_addr);
7623 t0 &= ~0xfffc;
7624 t0 |= val & 0xfffc;
7625 bfd_put_32 (abfd, t0, hit_addr);
7626 break;
7627 }
7628 }
7629
7630 while (branch_fixups != NULL)
7631 {
7632 struct one_branch_fixup *f = branch_fixups;
7633 branch_fixups = branch_fixups->next;
7634 free (f);
7635 }
7636 }
7637
7638 workaround_change = FALSE;
7639 newsize = trampoff;
7640 if (htab->params->ppc476_workaround
7641 && (!bfd_link_relocatable (link_info)
7642 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7643 {
7644 bfd_vma addr, end_addr;
7645 unsigned int crossings;
7646 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7647
7648 addr = isec->output_section->vma + isec->output_offset;
7649 end_addr = addr + trampoff;
7650 addr &= -pagesize;
7651 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7652 if (crossings != 0)
7653 {
7654 /* Keep space aligned, to ensure the patch code itself does
7655 not cross a page. Don't decrease size calculated on a
7656 previous pass as otherwise we might never settle on a layout. */
7657 newsize = 15 - ((end_addr - 1) & 15);
7658 newsize += crossings * 16;
7659 if (relax_info->workaround_size < newsize)
7660 {
7661 relax_info->workaround_size = newsize;
7662 workaround_change = TRUE;
7663 }
7664 /* Ensure relocate_section is called. */
7665 isec->flags |= SEC_RELOC;
7666 }
7667 newsize = trampoff + relax_info->workaround_size;
7668 }
7669
7670 if (htab->params->pic_fixup > 0)
7671 {
7672 picfixup_size -= relax_info->picfixup_size;
7673 if (picfixup_size != 0)
7674 relax_info->picfixup_size += picfixup_size;
7675 newsize += relax_info->picfixup_size;
7676 }
7677
7678 if (changes != 0 || picfixup_size != 0 || workaround_change)
7679 isec->size = newsize;
7680
7681 if (isymbuf != NULL
7682 && symtab_hdr->contents != (unsigned char *) isymbuf)
7683 {
7684 if (! link_info->keep_memory)
7685 free (isymbuf);
7686 else
7687 {
7688 /* Cache the symbols for elf_link_input_bfd. */
7689 symtab_hdr->contents = (unsigned char *) isymbuf;
7690 }
7691 }
7692
7693 if (contents != NULL
7694 && elf_section_data (isec)->this_hdr.contents != contents)
7695 {
7696 if (!changes && !link_info->keep_memory)
7697 free (contents);
7698 else
7699 {
7700 /* Cache the section contents for elf_link_input_bfd. */
7701 elf_section_data (isec)->this_hdr.contents = contents;
7702 }
7703 }
7704
7705 changes += picfixup_size;
7706 if (changes != 0)
7707 {
7708 /* Append sufficient NOP relocs so we can write out relocation
7709 information for the trampolines. */
7710 Elf_Internal_Shdr *rel_hdr;
7711 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7712 * sizeof (*new_relocs));
7713 unsigned ix;
7714
7715 if (!new_relocs)
7716 goto error_return;
7717 memcpy (new_relocs, internal_relocs,
7718 isec->reloc_count * sizeof (*new_relocs));
7719 for (ix = changes; ix--;)
7720 {
7721 irel = new_relocs + ix + isec->reloc_count;
7722
7723 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7724 }
7725 if (internal_relocs != elf_section_data (isec)->relocs)
7726 free (internal_relocs);
7727 elf_section_data (isec)->relocs = new_relocs;
7728 isec->reloc_count += changes;
7729 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7730 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7731 }
7732 else if (internal_relocs != NULL
7733 && elf_section_data (isec)->relocs != internal_relocs)
7734 free (internal_relocs);
7735
7736 *again = changes != 0 || workaround_change;
7737 return TRUE;
7738
7739 error_return:
7740 while (branch_fixups != NULL)
7741 {
7742 struct one_branch_fixup *f = branch_fixups;
7743 branch_fixups = branch_fixups->next;
7744 free (f);
7745 }
7746 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7747 free (isymbuf);
7748 if (contents != NULL
7749 && elf_section_data (isec)->this_hdr.contents != contents)
7750 free (contents);
7751 if (internal_relocs != NULL
7752 && elf_section_data (isec)->relocs != internal_relocs)
7753 free (internal_relocs);
7754 return FALSE;
7755 }
7756 \f
7757 /* What to do when ld finds relocations against symbols defined in
7758 discarded sections. */
7759
7760 static unsigned int
7761 ppc_elf_action_discarded (asection *sec)
7762 {
7763 if (strcmp (".fixup", sec->name) == 0)
7764 return 0;
7765
7766 if (strcmp (".got2", sec->name) == 0)
7767 return 0;
7768
7769 return _bfd_elf_default_action_discarded (sec);
7770 }
7771 \f
7772 /* Fill in the address for a pointer generated in a linker section. */
7773
7774 static bfd_vma
7775 elf_finish_pointer_linker_section (bfd *input_bfd,
7776 elf_linker_section_t *lsect,
7777 struct elf_link_hash_entry *h,
7778 bfd_vma relocation,
7779 const Elf_Internal_Rela *rel)
7780 {
7781 elf_linker_section_pointers_t *linker_section_ptr;
7782
7783 BFD_ASSERT (lsect != NULL);
7784
7785 if (h != NULL)
7786 {
7787 /* Handle global symbol. */
7788 struct ppc_elf_link_hash_entry *eh;
7789
7790 eh = (struct ppc_elf_link_hash_entry *) h;
7791 BFD_ASSERT (eh->elf.def_regular);
7792 linker_section_ptr = eh->linker_section_pointer;
7793 }
7794 else
7795 {
7796 /* Handle local symbol. */
7797 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7798
7799 BFD_ASSERT (is_ppc_elf (input_bfd));
7800 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7801 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7802 }
7803
7804 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7805 rel->r_addend,
7806 lsect);
7807 BFD_ASSERT (linker_section_ptr != NULL);
7808
7809 /* Offset will always be a multiple of four, so use the bottom bit
7810 as a "written" flag. */
7811 if ((linker_section_ptr->offset & 1) == 0)
7812 {
7813 bfd_put_32 (lsect->section->owner,
7814 relocation + linker_section_ptr->addend,
7815 lsect->section->contents + linker_section_ptr->offset);
7816 linker_section_ptr->offset += 1;
7817 }
7818
7819 relocation = (lsect->section->output_section->vma
7820 + lsect->section->output_offset
7821 + linker_section_ptr->offset - 1
7822 - SYM_VAL (lsect->sym));
7823
7824 #ifdef DEBUG
7825 fprintf (stderr,
7826 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7827 lsect->name, (long) relocation, (long) relocation);
7828 #endif
7829
7830 return relocation;
7831 }
7832
7833 #define PPC_LO(v) ((v) & 0xffff)
7834 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7835 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7836
7837 static void
7838 write_glink_stub (struct elf_link_hash_entry *h, struct plt_entry *ent,
7839 asection *plt_sec, unsigned char *p,
7840 struct bfd_link_info *info)
7841 {
7842 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7843 bfd *output_bfd = info->output_bfd;
7844 bfd_vma plt;
7845 unsigned char *end = p + GLINK_ENTRY_SIZE (htab, h);
7846
7847 if (h != NULL
7848 && h == htab->tls_get_addr
7849 && !htab->params->no_tls_get_addr_opt)
7850 {
7851 bfd_put_32 (output_bfd, LWZ_11_3, p);
7852 p += 4;
7853 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
7854 p += 4;
7855 bfd_put_32 (output_bfd, MR_0_3, p);
7856 p += 4;
7857 bfd_put_32 (output_bfd, CMPWI_11_0, p);
7858 p += 4;
7859 bfd_put_32 (output_bfd, ADD_3_12_2, p);
7860 p += 4;
7861 bfd_put_32 (output_bfd, BEQLR, p);
7862 p += 4;
7863 bfd_put_32 (output_bfd, MR_3_0, p);
7864 p += 4;
7865 bfd_put_32 (output_bfd, NOP, p);
7866 p += 4;
7867 }
7868
7869 plt = ((ent->plt.offset & ~1)
7870 + plt_sec->output_section->vma
7871 + plt_sec->output_offset);
7872
7873 if (bfd_link_pic (info))
7874 {
7875 bfd_vma got = 0;
7876
7877 if (ent->addend >= 32768)
7878 got = (ent->addend
7879 + ent->sec->output_section->vma
7880 + ent->sec->output_offset);
7881 else if (htab->elf.hgot != NULL)
7882 got = SYM_VAL (htab->elf.hgot);
7883
7884 plt -= got;
7885
7886 if (plt + 0x8000 < 0x10000)
7887 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7888 else
7889 {
7890 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7891 p += 4;
7892 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7893 }
7894 }
7895 else
7896 {
7897 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7898 p += 4;
7899 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7900 }
7901 p += 4;
7902 bfd_put_32 (output_bfd, MTCTR_11, p);
7903 p += 4;
7904 bfd_put_32 (output_bfd, BCTR, p);
7905 p += 4;
7906 while (p < end)
7907 {
7908 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7909 p += 4;
7910 }
7911 }
7912
7913 /* Return true if symbol is defined statically. */
7914
7915 static bfd_boolean
7916 is_static_defined (struct elf_link_hash_entry *h)
7917 {
7918 return ((h->root.type == bfd_link_hash_defined
7919 || h->root.type == bfd_link_hash_defweak)
7920 && h->root.u.def.section != NULL
7921 && h->root.u.def.section->output_section != NULL);
7922 }
7923
7924 /* If INSN is an opcode that may be used with an @tls operand, return
7925 the transformed insn for TLS optimisation, otherwise return 0. If
7926 REG is non-zero only match an insn with RB or RA equal to REG. */
7927
7928 unsigned int
7929 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7930 {
7931 unsigned int rtra;
7932
7933 if ((insn & (0x3f << 26)) != 31 << 26)
7934 return 0;
7935
7936 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7937 rtra = insn & ((1 << 26) - (1 << 16));
7938 else if (((insn >> 16) & 0x1f) == reg)
7939 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7940 else
7941 return 0;
7942
7943 if ((insn & (0x3ff << 1)) == 266 << 1)
7944 /* add -> addi. */
7945 insn = 14 << 26;
7946 else if ((insn & (0x1f << 1)) == 23 << 1
7947 && ((insn & (0x1f << 6)) < 14 << 6
7948 || ((insn & (0x1f << 6)) >= 16 << 6
7949 && (insn & (0x1f << 6)) < 24 << 6)))
7950 /* load and store indexed -> dform. */
7951 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7952 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7953 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7954 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7955 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7956 /* lwax -> lwa. */
7957 insn = (58 << 26) | 2;
7958 else
7959 return 0;
7960 insn |= rtra;
7961 return insn;
7962 }
7963
7964 /* If INSN is an opcode that may be used with an @tprel operand, return
7965 the transformed insn for an undefined weak symbol, ie. with the
7966 thread pointer REG operand removed. Otherwise return 0. */
7967
7968 unsigned int
7969 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7970 {
7971 if ((insn & (0x1f << 16)) == reg << 16
7972 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7973 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7974 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7975 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7976 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7977 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7978 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7979 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7980 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7981 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7982 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7983 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7984 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7985 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7986 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7987 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7988 && (insn & 3) != 1)
7989 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7990 && ((insn & 3) == 0 || (insn & 3) == 3))))
7991 {
7992 insn &= ~(0x1f << 16);
7993 }
7994 else if ((insn & (0x1f << 21)) == reg << 21
7995 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7996 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7997 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7998 {
7999 insn &= ~(0x1f << 21);
8000 insn |= (insn & (0x1f << 16)) << 5;
8001 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
8002 insn -= 2 >> 26; /* convert to ori,oris */
8003 }
8004 else
8005 insn = 0;
8006 return insn;
8007 }
8008
8009 static bfd_boolean
8010 is_insn_ds_form (unsigned int insn)
8011 {
8012 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8013 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8014 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
8015 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
8016 }
8017
8018 static bfd_boolean
8019 is_insn_dq_form (unsigned int insn)
8020 {
8021 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
8022 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8023 && (insn & 3) == 1));
8024 }
8025
8026 /* The RELOCATE_SECTION function is called by the ELF backend linker
8027 to handle the relocations for a section.
8028
8029 The relocs are always passed as Rela structures; if the section
8030 actually uses Rel structures, the r_addend field will always be
8031 zero.
8032
8033 This function is responsible for adjust the section contents as
8034 necessary, and (if using Rela relocs and generating a
8035 relocatable output file) adjusting the reloc addend as
8036 necessary.
8037
8038 This function does not have to worry about setting the reloc
8039 address or the reloc symbol index.
8040
8041 LOCAL_SYMS is a pointer to the swapped in local symbols.
8042
8043 LOCAL_SECTIONS is an array giving the section in the input file
8044 corresponding to the st_shndx field of each local symbol.
8045
8046 The global hash table entry for the global symbols can be found
8047 via elf_sym_hashes (input_bfd).
8048
8049 When generating relocatable output, this function must handle
8050 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
8051 going to be the section symbol corresponding to the output
8052 section, which means that the addend must be adjusted
8053 accordingly. */
8054
8055 static bfd_boolean
8056 ppc_elf_relocate_section (bfd *output_bfd,
8057 struct bfd_link_info *info,
8058 bfd *input_bfd,
8059 asection *input_section,
8060 bfd_byte *contents,
8061 Elf_Internal_Rela *relocs,
8062 Elf_Internal_Sym *local_syms,
8063 asection **local_sections)
8064 {
8065 Elf_Internal_Shdr *symtab_hdr;
8066 struct elf_link_hash_entry **sym_hashes;
8067 struct ppc_elf_link_hash_table *htab;
8068 Elf_Internal_Rela *rel;
8069 Elf_Internal_Rela *wrel;
8070 Elf_Internal_Rela *relend;
8071 Elf_Internal_Rela outrel;
8072 asection *got2;
8073 bfd_vma *local_got_offsets;
8074 bfd_boolean ret = TRUE;
8075 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
8076 bfd_boolean is_vxworks_tls;
8077 unsigned int picfixup_size = 0;
8078 struct ppc_elf_relax_info *relax_info = NULL;
8079
8080 #ifdef DEBUG
8081 _bfd_error_handler ("ppc_elf_relocate_section called for %pB section %pA, "
8082 "%ld relocations%s",
8083 input_bfd, input_section,
8084 (long) input_section->reloc_count,
8085 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
8086 #endif
8087
8088 got2 = bfd_get_section_by_name (input_bfd, ".got2");
8089
8090 /* Initialize howto table if not already done. */
8091 if (!ppc_elf_howto_table[R_PPC_ADDR32])
8092 ppc_elf_howto_init ();
8093
8094 htab = ppc_elf_hash_table (info);
8095 local_got_offsets = elf_local_got_offsets (input_bfd);
8096 symtab_hdr = &elf_symtab_hdr (input_bfd);
8097 sym_hashes = elf_sym_hashes (input_bfd);
8098 /* We have to handle relocations in vxworks .tls_vars sections
8099 specially, because the dynamic loader is 'weird'. */
8100 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
8101 && !strcmp (input_section->output_section->name,
8102 ".tls_vars"));
8103 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
8104 relax_info = elf_section_data (input_section)->sec_info;
8105 rel = wrel = relocs;
8106 relend = relocs + input_section->reloc_count;
8107 for (; rel < relend; wrel++, rel++)
8108 {
8109 enum elf_ppc_reloc_type r_type;
8110 bfd_vma addend;
8111 bfd_reloc_status_type r;
8112 Elf_Internal_Sym *sym;
8113 asection *sec;
8114 struct elf_link_hash_entry *h;
8115 const char *sym_name;
8116 reloc_howto_type *howto;
8117 unsigned long r_symndx;
8118 bfd_vma relocation;
8119 bfd_vma branch_bit, from;
8120 bfd_boolean unresolved_reloc, save_unresolved_reloc;
8121 bfd_boolean warned;
8122 unsigned int tls_type, tls_mask, tls_gd;
8123 struct plt_entry **ifunc, **plt_list;
8124 struct reloc_howto_struct alt_howto;
8125
8126 again:
8127 r_type = ELF32_R_TYPE (rel->r_info);
8128 sym = NULL;
8129 sec = NULL;
8130 h = NULL;
8131 unresolved_reloc = FALSE;
8132 warned = FALSE;
8133 r_symndx = ELF32_R_SYM (rel->r_info);
8134
8135 if (r_symndx < symtab_hdr->sh_info)
8136 {
8137 sym = local_syms + r_symndx;
8138 sec = local_sections[r_symndx];
8139 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
8140
8141 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
8142 }
8143 else
8144 {
8145 bfd_boolean ignored;
8146
8147 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
8148 r_symndx, symtab_hdr, sym_hashes,
8149 h, sec, relocation,
8150 unresolved_reloc, warned, ignored);
8151
8152 sym_name = h->root.root.string;
8153 }
8154
8155 if (sec != NULL && discarded_section (sec))
8156 {
8157 /* For relocs against symbols from removed linkonce sections,
8158 or sections discarded by a linker script, we just want the
8159 section contents zeroed. Avoid any special processing. */
8160 howto = NULL;
8161 if (r_type < R_PPC_max)
8162 howto = ppc_elf_howto_table[r_type];
8163
8164 _bfd_clear_contents (howto, input_bfd, input_section,
8165 contents + rel->r_offset);
8166 wrel->r_offset = rel->r_offset;
8167 wrel->r_info = 0;
8168 wrel->r_addend = 0;
8169
8170 /* For ld -r, remove relocations in debug sections against
8171 symbols defined in discarded sections. Not done for
8172 non-debug to preserve relocs in .eh_frame which the
8173 eh_frame editing code expects to be present. */
8174 if (bfd_link_relocatable (info)
8175 && (input_section->flags & SEC_DEBUGGING))
8176 wrel--;
8177
8178 continue;
8179 }
8180
8181 if (bfd_link_relocatable (info))
8182 {
8183 if (got2 != NULL
8184 && r_type == R_PPC_PLTREL24
8185 && rel->r_addend != 0)
8186 {
8187 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8188 addend specifies the GOT pointer offset within .got2. */
8189 rel->r_addend += got2->output_offset;
8190 }
8191 if (r_type != R_PPC_RELAX_PLT
8192 && r_type != R_PPC_RELAX_PLTREL24
8193 && r_type != R_PPC_RELAX)
8194 goto copy_reloc;
8195 }
8196
8197 /* TLS optimizations. Replace instruction sequences and relocs
8198 based on information we collected in tls_optimize. We edit
8199 RELOCS so that --emit-relocs will output something sensible
8200 for the final instruction stream. */
8201 tls_mask = 0;
8202 tls_gd = 0;
8203 if (h != NULL)
8204 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
8205 else if (local_got_offsets != NULL)
8206 {
8207 struct plt_entry **local_plt;
8208 char *lgot_masks;
8209 local_plt
8210 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
8211 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
8212 tls_mask = lgot_masks[r_symndx];
8213 }
8214
8215 /* Ensure reloc mapping code below stays sane. */
8216 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
8217 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
8218 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
8219 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
8220 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
8221 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
8222 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
8223 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
8224 abort ();
8225 switch (r_type)
8226 {
8227 default:
8228 break;
8229
8230 case R_PPC_GOT_TPREL16:
8231 case R_PPC_GOT_TPREL16_LO:
8232 if ((tls_mask & TLS_TLS) != 0
8233 && (tls_mask & TLS_TPREL) == 0)
8234 {
8235 bfd_vma insn;
8236
8237 insn = bfd_get_32 (input_bfd,
8238 contents + rel->r_offset - d_offset);
8239 insn &= 31 << 21;
8240 insn |= 0x3c020000; /* addis 0,2,0 */
8241 bfd_put_32 (input_bfd, insn,
8242 contents + rel->r_offset - d_offset);
8243 r_type = R_PPC_TPREL16_HA;
8244 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8245 }
8246 break;
8247
8248 case R_PPC_TLS:
8249 if ((tls_mask & TLS_TLS) != 0
8250 && (tls_mask & TLS_TPREL) == 0)
8251 {
8252 bfd_vma insn;
8253
8254 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8255 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
8256 if (insn == 0)
8257 abort ();
8258 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8259 r_type = R_PPC_TPREL16_LO;
8260 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8261
8262 /* Was PPC_TLS which sits on insn boundary, now
8263 PPC_TPREL16_LO which is at low-order half-word. */
8264 rel->r_offset += d_offset;
8265 }
8266 break;
8267
8268 case R_PPC_GOT_TLSGD16_HI:
8269 case R_PPC_GOT_TLSGD16_HA:
8270 tls_gd = TLS_TPRELGD;
8271 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8272 goto tls_gdld_hi;
8273 break;
8274
8275 case R_PPC_GOT_TLSLD16_HI:
8276 case R_PPC_GOT_TLSLD16_HA:
8277 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8278 {
8279 tls_gdld_hi:
8280 if ((tls_mask & tls_gd) != 0)
8281 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8282 + R_PPC_GOT_TPREL16);
8283 else
8284 {
8285 rel->r_offset -= d_offset;
8286 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8287 r_type = R_PPC_NONE;
8288 }
8289 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8290 }
8291 break;
8292
8293 case R_PPC_GOT_TLSGD16:
8294 case R_PPC_GOT_TLSGD16_LO:
8295 tls_gd = TLS_TPRELGD;
8296 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8297 goto tls_ldgd_opt;
8298 break;
8299
8300 case R_PPC_GOT_TLSLD16:
8301 case R_PPC_GOT_TLSLD16_LO:
8302 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8303 {
8304 unsigned int insn1, insn2;
8305 bfd_vma offset;
8306
8307 tls_ldgd_opt:
8308 offset = (bfd_vma) -1;
8309 /* If not using the newer R_PPC_TLSGD/LD to mark
8310 __tls_get_addr calls, we must trust that the call
8311 stays with its arg setup insns, ie. that the next
8312 reloc is the __tls_get_addr call associated with
8313 the current reloc. Edit both insns. */
8314 if (input_section->has_tls_get_addr_call
8315 && rel + 1 < relend
8316 && branch_reloc_hash_match (input_bfd, rel + 1,
8317 htab->tls_get_addr))
8318 offset = rel[1].r_offset;
8319 /* We read the low GOT_TLS insn because we need to keep
8320 the destination reg. It may be something other than
8321 the usual r3, and moved to r3 before the call by
8322 intervening code. */
8323 insn1 = bfd_get_32 (input_bfd,
8324 contents + rel->r_offset - d_offset);
8325 if ((tls_mask & tls_gd) != 0)
8326 {
8327 /* IE */
8328 insn1 &= (0x1f << 21) | (0x1f << 16);
8329 insn1 |= 32 << 26; /* lwz */
8330 if (offset != (bfd_vma) -1)
8331 {
8332 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8333 insn2 = 0x7c631214; /* add 3,3,2 */
8334 bfd_put_32 (input_bfd, insn2, contents + offset);
8335 }
8336 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8337 + R_PPC_GOT_TPREL16);
8338 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8339 }
8340 else
8341 {
8342 /* LE */
8343 insn1 &= 0x1f << 21;
8344 insn1 |= 0x3c020000; /* addis r,2,0 */
8345 if (tls_gd == 0)
8346 {
8347 /* Was an LD reloc. */
8348 for (r_symndx = 0;
8349 r_symndx < symtab_hdr->sh_info;
8350 r_symndx++)
8351 if (local_sections[r_symndx] == sec)
8352 break;
8353 if (r_symndx >= symtab_hdr->sh_info)
8354 r_symndx = STN_UNDEF;
8355 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8356 if (r_symndx != STN_UNDEF)
8357 rel->r_addend -= (local_syms[r_symndx].st_value
8358 + sec->output_offset
8359 + sec->output_section->vma);
8360 }
8361 r_type = R_PPC_TPREL16_HA;
8362 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8363 if (offset != (bfd_vma) -1)
8364 {
8365 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8366 rel[1].r_offset = offset + d_offset;
8367 rel[1].r_addend = rel->r_addend;
8368 insn2 = 0x38630000; /* addi 3,3,0 */
8369 bfd_put_32 (input_bfd, insn2, contents + offset);
8370 }
8371 }
8372 bfd_put_32 (input_bfd, insn1,
8373 contents + rel->r_offset - d_offset);
8374 if (tls_gd == 0)
8375 {
8376 /* We changed the symbol on an LD reloc. Start over
8377 in order to get h, sym, sec etc. right. */
8378 goto again;
8379 }
8380 }
8381 break;
8382
8383 case R_PPC_TLSGD:
8384 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
8385 && rel + 1 < relend)
8386 {
8387 unsigned int insn2;
8388 bfd_vma offset = rel->r_offset;
8389
8390 if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
8391 {
8392 bfd_put_32 (input_bfd, NOP, contents + offset);
8393 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8394 break;
8395 }
8396
8397 if ((tls_mask & TLS_TPRELGD) != 0)
8398 {
8399 /* IE */
8400 r_type = R_PPC_NONE;
8401 insn2 = 0x7c631214; /* add 3,3,2 */
8402 }
8403 else
8404 {
8405 /* LE */
8406 r_type = R_PPC_TPREL16_LO;
8407 rel->r_offset += d_offset;
8408 insn2 = 0x38630000; /* addi 3,3,0 */
8409 }
8410 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8411 bfd_put_32 (input_bfd, insn2, contents + offset);
8412 /* Zap the reloc on the _tls_get_addr call too. */
8413 BFD_ASSERT (offset == rel[1].r_offset);
8414 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8415 }
8416 break;
8417
8418 case R_PPC_TLSLD:
8419 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
8420 && rel + 1 < relend)
8421 {
8422 unsigned int insn2;
8423
8424 if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
8425 {
8426 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8427 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8428 break;
8429 }
8430
8431 for (r_symndx = 0;
8432 r_symndx < symtab_hdr->sh_info;
8433 r_symndx++)
8434 if (local_sections[r_symndx] == sec)
8435 break;
8436 if (r_symndx >= symtab_hdr->sh_info)
8437 r_symndx = STN_UNDEF;
8438 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8439 if (r_symndx != STN_UNDEF)
8440 rel->r_addend -= (local_syms[r_symndx].st_value
8441 + sec->output_offset
8442 + sec->output_section->vma);
8443
8444 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8445 rel->r_offset += d_offset;
8446 insn2 = 0x38630000; /* addi 3,3,0 */
8447 bfd_put_32 (input_bfd, insn2,
8448 contents + rel->r_offset - d_offset);
8449 /* Zap the reloc on the _tls_get_addr call too. */
8450 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8451 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8452 goto again;
8453 }
8454 break;
8455 }
8456
8457 /* Handle other relocations that tweak non-addend part of insn. */
8458 branch_bit = 0;
8459 switch (r_type)
8460 {
8461 default:
8462 break;
8463
8464 /* Branch taken prediction relocations. */
8465 case R_PPC_ADDR14_BRTAKEN:
8466 case R_PPC_REL14_BRTAKEN:
8467 branch_bit = BRANCH_PREDICT_BIT;
8468 /* Fall through. */
8469
8470 /* Branch not taken prediction relocations. */
8471 case R_PPC_ADDR14_BRNTAKEN:
8472 case R_PPC_REL14_BRNTAKEN:
8473 {
8474 unsigned int insn;
8475
8476 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8477 insn &= ~BRANCH_PREDICT_BIT;
8478 insn |= branch_bit;
8479
8480 from = (rel->r_offset
8481 + input_section->output_offset
8482 + input_section->output_section->vma);
8483
8484 /* Invert 'y' bit if not the default. */
8485 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8486 insn ^= BRANCH_PREDICT_BIT;
8487
8488 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8489 }
8490 break;
8491
8492 case R_PPC_PLT16_HA:
8493 {
8494 unsigned int insn;
8495
8496 insn = bfd_get_32 (input_bfd,
8497 contents + rel->r_offset - d_offset);
8498 if ((insn & (0x3f << 26)) == 15u << 26
8499 && (insn & (0x1f << 16)) != 0)
8500 {
8501 if (!bfd_link_pic (info))
8502 {
8503 /* Convert addis to lis. */
8504 insn &= ~(0x1f << 16);
8505 bfd_put_32 (input_bfd, insn,
8506 contents + rel->r_offset - d_offset);
8507 }
8508 }
8509 else if (bfd_link_pic (info))
8510 info->callbacks->einfo
8511 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8512 input_bfd, input_section, rel->r_offset,
8513 "R_PPC_PLT16_HA", insn);
8514 }
8515 break;
8516 }
8517
8518 if (ELIMINATE_COPY_RELOCS
8519 && h != NULL
8520 && !h->def_regular
8521 && h->protected_def
8522 && ppc_elf_hash_entry (h)->has_addr16_ha
8523 && ppc_elf_hash_entry (h)->has_addr16_lo
8524 && htab->params->pic_fixup > 0)
8525 {
8526 /* Convert lis;addi or lis;load/store accessing a protected
8527 variable defined in a shared library to PIC. */
8528 unsigned int insn;
8529
8530 if (r_type == R_PPC_ADDR16_HA)
8531 {
8532 insn = bfd_get_32 (input_bfd,
8533 contents + rel->r_offset - d_offset);
8534 if ((insn & (0x3f << 26)) == (15u << 26)
8535 && (insn & (0x1f << 16)) == 0 /* lis */)
8536 {
8537 bfd_byte *p;
8538 bfd_vma off;
8539 bfd_vma got_addr;
8540
8541 p = (contents + input_section->size
8542 - relax_info->workaround_size
8543 - relax_info->picfixup_size
8544 + picfixup_size);
8545 off = (p - contents) - (rel->r_offset - d_offset);
8546 if (off > 0x1fffffc || (off & 3) != 0)
8547 info->callbacks->einfo
8548 (_("%H: fixup branch overflow\n"),
8549 input_bfd, input_section, rel->r_offset);
8550
8551 bfd_put_32 (input_bfd, B | off,
8552 contents + rel->r_offset - d_offset);
8553 got_addr = (htab->elf.sgot->output_section->vma
8554 + htab->elf.sgot->output_offset
8555 + (h->got.offset & ~1));
8556 wrel->r_offset = (p - contents) + d_offset;
8557 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8558 wrel->r_addend = got_addr;
8559 insn &= ~0xffff;
8560 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8561 bfd_put_32 (input_bfd, insn, p);
8562
8563 /* Convert lis to lwz, loading address from GOT. */
8564 insn &= ~0xffff;
8565 insn ^= (32u ^ 15u) << 26;
8566 insn |= (insn & (0x1f << 21)) >> 5;
8567 insn |= got_addr & 0xffff;
8568 bfd_put_32 (input_bfd, insn, p + 4);
8569
8570 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8571 picfixup_size += 12;
8572
8573 /* Use one of the spare relocs, so --emit-relocs
8574 output is reasonable. */
8575 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8576 wrel++, rel++;
8577 rel->r_offset = wrel[-1].r_offset + 4;
8578 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8579 rel->r_addend = wrel[-1].r_addend;
8580
8581 /* Continue on as if we had a got reloc, to output
8582 dynamic reloc. */
8583 r_type = R_PPC_GOT16_LO;
8584 }
8585 else
8586 _bfd_error_handler
8587 /* xgettext:c-format */
8588 (_("%pB(%pA+%#" PRIx64 "): error: "
8589 "%s with unexpected instruction %#x"),
8590 input_bfd, input_section, (uint64_t) rel->r_offset,
8591 "R_PPC_ADDR16_HA", insn);
8592 }
8593 else if (r_type == R_PPC_ADDR16_LO)
8594 {
8595 insn = bfd_get_32 (input_bfd,
8596 contents + rel->r_offset - d_offset);
8597 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8598 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8599 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8600 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8601 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8602 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8603 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8604 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8605 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8606 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8607 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8608 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8609 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8610 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8611 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8612 && (insn & 3) != 1)
8613 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8614 && ((insn & 3) == 0 || (insn & 3) == 3)))
8615 {
8616 /* Arrange to apply the reloc addend, if any. */
8617 relocation = 0;
8618 unresolved_reloc = FALSE;
8619 rel->r_info = ELF32_R_INFO (0, r_type);
8620 }
8621 else
8622 _bfd_error_handler
8623 /* xgettext:c-format */
8624 (_("%pB(%pA+%#" PRIx64 "): error: "
8625 "%s with unexpected instruction %#x"),
8626 input_bfd, input_section, (uint64_t) rel->r_offset,
8627 "R_PPC_ADDR16_LO", insn);
8628 }
8629 }
8630
8631 ifunc = NULL;
8632 if (!htab->is_vxworks)
8633 {
8634 struct plt_entry *ent;
8635
8636 if (h != NULL)
8637 {
8638 if (h->type == STT_GNU_IFUNC)
8639 ifunc = &h->plt.plist;
8640 }
8641 else if (local_got_offsets != NULL
8642 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8643 {
8644 struct plt_entry **local_plt;
8645
8646 local_plt = (struct plt_entry **) (local_got_offsets
8647 + symtab_hdr->sh_info);
8648 ifunc = local_plt + r_symndx;
8649 }
8650
8651 ent = NULL;
8652 if (ifunc != NULL
8653 && (!bfd_link_pic (info)
8654 || is_branch_reloc (r_type)
8655 || r_type == R_PPC_PLT16_LO
8656 || r_type == R_PPC_PLT16_HI
8657 || r_type == R_PPC_PLT16_HA))
8658 {
8659 addend = 0;
8660 if (bfd_link_pic (info)
8661 && (r_type == R_PPC_PLTREL24
8662 || r_type == R_PPC_PLT16_LO
8663 || r_type == R_PPC_PLT16_HI
8664 || r_type == R_PPC_PLT16_HA))
8665 addend = rel->r_addend;
8666 ent = find_plt_ent (ifunc, got2, addend);
8667 }
8668 if (ent != NULL)
8669 {
8670 if (bfd_link_pic (info)
8671 && ent->sec != got2
8672 && htab->plt_type != PLT_NEW
8673 && (!htab->elf.dynamic_sections_created
8674 || h == NULL
8675 || h->dynindx == -1))
8676 {
8677 /* Uh oh, we are going to create a pic glink stub
8678 for an ifunc (here for h == NULL and later in
8679 finish_dynamic_symbol for h != NULL), and
8680 apparently are using code compiled with
8681 -mbss-plt. The difficulty is that -mbss-plt code
8682 gives no indication via a magic PLTREL24 addend
8683 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8684 is pointing into a .got2 section (and how far
8685 into .got2). */
8686 info->callbacks->einfo
8687 /* xgettext:c-format */
8688 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8689 input_bfd, input_section, rel->r_offset, sym_name);
8690 }
8691
8692 unresolved_reloc = FALSE;
8693 if (htab->plt_type == PLT_NEW
8694 || !htab->elf.dynamic_sections_created
8695 || h == NULL
8696 || h->dynindx == -1)
8697 relocation = (htab->glink->output_section->vma
8698 + htab->glink->output_offset
8699 + (ent->glink_offset & ~1));
8700 else
8701 relocation = (htab->elf.splt->output_section->vma
8702 + htab->elf.splt->output_offset
8703 + ent->plt.offset);
8704 }
8705 }
8706
8707 addend = rel->r_addend;
8708 save_unresolved_reloc = unresolved_reloc;
8709 howto = NULL;
8710 if (r_type < R_PPC_max)
8711 howto = ppc_elf_howto_table[r_type];
8712
8713 switch (r_type)
8714 {
8715 default:
8716 break;
8717
8718 case R_PPC_TPREL16_HA:
8719 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8720 {
8721 bfd_byte *p = contents + (rel->r_offset & ~3);
8722 unsigned int insn = bfd_get_32 (input_bfd, p);
8723 if ((insn & ((0x3f << 26) | 0x1f << 16))
8724 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8725 /* xgettext:c-format */
8726 info->callbacks->minfo
8727 (_("%H: warning: %s unexpected insn %#x.\n"),
8728 input_bfd, input_section, rel->r_offset, howto->name, insn);
8729 else
8730 bfd_put_32 (input_bfd, NOP, p);
8731 }
8732 break;
8733
8734 case R_PPC_TPREL16_LO:
8735 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8736 {
8737 bfd_byte *p = contents + (rel->r_offset & ~3);
8738 unsigned int insn = bfd_get_32 (input_bfd, p);
8739 insn &= ~(0x1f << 16);
8740 insn |= 2 << 16;
8741 bfd_put_32 (input_bfd, insn, p);
8742 }
8743 break;
8744 }
8745
8746 tls_type = 0;
8747 switch (r_type)
8748 {
8749 default:
8750 /* xgettext:c-format */
8751 _bfd_error_handler (_("%pB: %s unsupported"),
8752 input_bfd, howto->name);
8753
8754 bfd_set_error (bfd_error_bad_value);
8755 ret = FALSE;
8756 goto copy_reloc;
8757
8758 case R_PPC_NONE:
8759 case R_PPC_TLS:
8760 case R_PPC_TLSGD:
8761 case R_PPC_TLSLD:
8762 case R_PPC_EMB_MRKREF:
8763 case R_PPC_GNU_VTINHERIT:
8764 case R_PPC_GNU_VTENTRY:
8765 goto copy_reloc;
8766
8767 /* GOT16 relocations. Like an ADDR16 using the symbol's
8768 address in the GOT as relocation value instead of the
8769 symbol's value itself. Also, create a GOT entry for the
8770 symbol and put the symbol value there. */
8771 case R_PPC_GOT_TLSGD16:
8772 case R_PPC_GOT_TLSGD16_LO:
8773 case R_PPC_GOT_TLSGD16_HI:
8774 case R_PPC_GOT_TLSGD16_HA:
8775 tls_type = TLS_TLS | TLS_GD;
8776 goto dogot;
8777
8778 case R_PPC_GOT_TLSLD16:
8779 case R_PPC_GOT_TLSLD16_LO:
8780 case R_PPC_GOT_TLSLD16_HI:
8781 case R_PPC_GOT_TLSLD16_HA:
8782 tls_type = TLS_TLS | TLS_LD;
8783 goto dogot;
8784
8785 case R_PPC_GOT_TPREL16:
8786 case R_PPC_GOT_TPREL16_LO:
8787 case R_PPC_GOT_TPREL16_HI:
8788 case R_PPC_GOT_TPREL16_HA:
8789 tls_type = TLS_TLS | TLS_TPREL;
8790 goto dogot;
8791
8792 case R_PPC_GOT_DTPREL16:
8793 case R_PPC_GOT_DTPREL16_LO:
8794 case R_PPC_GOT_DTPREL16_HI:
8795 case R_PPC_GOT_DTPREL16_HA:
8796 tls_type = TLS_TLS | TLS_DTPREL;
8797 goto dogot;
8798
8799 case R_PPC_GOT16:
8800 case R_PPC_GOT16_LO:
8801 case R_PPC_GOT16_HI:
8802 case R_PPC_GOT16_HA:
8803 tls_mask = 0;
8804 dogot:
8805 {
8806 /* Relocation is to the entry for this symbol in the global
8807 offset table. */
8808 bfd_vma off;
8809 bfd_vma *offp;
8810 unsigned long indx;
8811
8812 if (htab->elf.sgot == NULL)
8813 abort ();
8814
8815 indx = 0;
8816 if (tls_type == (TLS_TLS | TLS_LD)
8817 && (h == NULL
8818 || !h->def_dynamic))
8819 offp = &htab->tlsld_got.offset;
8820 else if (h != NULL)
8821 {
8822 if (!htab->elf.dynamic_sections_created
8823 || h->dynindx == -1
8824 || SYMBOL_REFERENCES_LOCAL (info, h)
8825 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8826 /* This is actually a static link, or it is a
8827 -Bsymbolic link and the symbol is defined
8828 locally, or the symbol was forced to be local
8829 because of a version file. */
8830 ;
8831 else
8832 {
8833 indx = h->dynindx;
8834 unresolved_reloc = FALSE;
8835 }
8836 offp = &h->got.offset;
8837 }
8838 else
8839 {
8840 if (local_got_offsets == NULL)
8841 abort ();
8842 offp = &local_got_offsets[r_symndx];
8843 }
8844
8845 /* The offset must always be a multiple of 4. We use the
8846 least significant bit to record whether we have already
8847 processed this entry. */
8848 off = *offp;
8849 if ((off & 1) != 0)
8850 off &= ~1;
8851 else
8852 {
8853 unsigned int tls_m = ((tls_mask & TLS_TLS) != 0
8854 ? tls_mask & (TLS_LD | TLS_GD | TLS_DTPREL
8855 | TLS_TPREL | TLS_TPRELGD)
8856 : 0);
8857
8858 if (offp == &htab->tlsld_got.offset)
8859 tls_m = TLS_LD;
8860 else if (h == NULL
8861 || !h->def_dynamic)
8862 tls_m &= ~TLS_LD;
8863
8864 /* We might have multiple got entries for this sym.
8865 Initialize them all. */
8866 do
8867 {
8868 int tls_ty = 0;
8869
8870 if ((tls_m & TLS_LD) != 0)
8871 {
8872 tls_ty = TLS_TLS | TLS_LD;
8873 tls_m &= ~TLS_LD;
8874 }
8875 else if ((tls_m & TLS_GD) != 0)
8876 {
8877 tls_ty = TLS_TLS | TLS_GD;
8878 tls_m &= ~TLS_GD;
8879 }
8880 else if ((tls_m & TLS_DTPREL) != 0)
8881 {
8882 tls_ty = TLS_TLS | TLS_DTPREL;
8883 tls_m &= ~TLS_DTPREL;
8884 }
8885 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8886 {
8887 tls_ty = TLS_TLS | TLS_TPREL;
8888 tls_m = 0;
8889 }
8890
8891 /* Generate relocs for the dynamic linker. */
8892 if (indx != 0
8893 || (bfd_link_pic (info)
8894 && (h == NULL
8895 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8896 || offp == &htab->tlsld_got.offset)
8897 && !(tls_ty == (TLS_TLS | TLS_TPREL)
8898 && bfd_link_executable (info)
8899 && SYMBOL_REFERENCES_LOCAL (info, h))))
8900 {
8901 asection *rsec = htab->elf.srelgot;
8902 bfd_byte * loc;
8903
8904 if (ifunc != NULL)
8905 {
8906 rsec = htab->elf.irelplt;
8907 if (indx == 0)
8908 htab->local_ifunc_resolver = 1;
8909 else if (is_static_defined (h))
8910 htab->maybe_local_ifunc_resolver = 1;
8911 }
8912 outrel.r_offset = (htab->elf.sgot->output_section->vma
8913 + htab->elf.sgot->output_offset
8914 + off);
8915 outrel.r_addend = 0;
8916 if (tls_ty & (TLS_LD | TLS_GD))
8917 {
8918 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8919 if (tls_ty == (TLS_TLS | TLS_GD))
8920 {
8921 loc = rsec->contents;
8922 loc += (rsec->reloc_count++
8923 * sizeof (Elf32_External_Rela));
8924 bfd_elf32_swap_reloca_out (output_bfd,
8925 &outrel, loc);
8926 outrel.r_offset += 4;
8927 outrel.r_info
8928 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8929 }
8930 }
8931 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8932 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8933 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8934 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8935 else if (indx != 0)
8936 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8937 else if (ifunc != NULL)
8938 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8939 else
8940 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8941 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8942 {
8943 outrel.r_addend += relocation;
8944 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8945 {
8946 if (htab->elf.tls_sec == NULL)
8947 outrel.r_addend = 0;
8948 else
8949 outrel.r_addend -= htab->elf.tls_sec->vma;
8950 }
8951 }
8952 loc = rsec->contents;
8953 loc += (rsec->reloc_count++
8954 * sizeof (Elf32_External_Rela));
8955 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8956 }
8957
8958 /* Init the .got section contents if we're not
8959 emitting a reloc. */
8960 else
8961 {
8962 bfd_vma value = relocation;
8963
8964 if (tls_ty != 0)
8965 {
8966 if (htab->elf.tls_sec == NULL)
8967 value = 0;
8968 else
8969 {
8970 if (tls_ty & TLS_LD)
8971 value = 0;
8972 else
8973 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8974 if (tls_ty & TLS_TPREL)
8975 value += DTP_OFFSET - TP_OFFSET;
8976 }
8977
8978 if (tls_ty & (TLS_LD | TLS_GD))
8979 {
8980 bfd_put_32 (input_bfd, value,
8981 htab->elf.sgot->contents + off + 4);
8982 value = 1;
8983 }
8984 }
8985 bfd_put_32 (input_bfd, value,
8986 htab->elf.sgot->contents + off);
8987 }
8988
8989 off += 4;
8990 if (tls_ty & (TLS_LD | TLS_GD))
8991 off += 4;
8992 }
8993 while (tls_m != 0);
8994
8995 off = *offp;
8996 *offp = off | 1;
8997 }
8998
8999 if (off >= (bfd_vma) -2)
9000 abort ();
9001
9002 if ((tls_type & TLS_TLS) != 0)
9003 {
9004 if (tls_type != (TLS_TLS | TLS_LD))
9005 {
9006 if ((tls_mask & TLS_LD) != 0
9007 && !(h == NULL
9008 || !h->def_dynamic))
9009 off += 8;
9010 if (tls_type != (TLS_TLS | TLS_GD))
9011 {
9012 if ((tls_mask & TLS_GD) != 0)
9013 off += 8;
9014 if (tls_type != (TLS_TLS | TLS_DTPREL))
9015 {
9016 if ((tls_mask & TLS_DTPREL) != 0)
9017 off += 4;
9018 }
9019 }
9020 }
9021 }
9022
9023 /* If here for a picfixup, we're done. */
9024 if (r_type != ELF32_R_TYPE (rel->r_info))
9025 goto copy_reloc;
9026
9027 relocation = (htab->elf.sgot->output_section->vma
9028 + htab->elf.sgot->output_offset
9029 + off
9030 - SYM_VAL (htab->elf.hgot));
9031
9032 /* Addends on got relocations don't make much sense.
9033 x+off@got is actually x@got+off, and since the got is
9034 generated by a hash table traversal, the value in the
9035 got at entry m+n bears little relation to the entry m. */
9036 if (addend != 0)
9037 info->callbacks->einfo
9038 /* xgettext:c-format */
9039 (_("%H: non-zero addend on %s reloc against `%s'\n"),
9040 input_bfd, input_section, rel->r_offset,
9041 howto->name,
9042 sym_name);
9043 }
9044 break;
9045
9046 /* Relocations that need no special processing. */
9047 case R_PPC_LOCAL24PC:
9048 /* It makes no sense to point a local relocation
9049 at a symbol not in this object. */
9050 if (unresolved_reloc)
9051 {
9052 (*info->callbacks->undefined_symbol) (info,
9053 h->root.root.string,
9054 input_bfd,
9055 input_section,
9056 rel->r_offset,
9057 TRUE);
9058 goto copy_reloc;
9059 }
9060 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
9061 {
9062 /* @local on an ifunc does not really make sense since
9063 the ifunc resolver can take you anywhere. More
9064 seriously, calls to ifuncs must go through a plt call
9065 stub, and for pic the plt call stubs uses r30 to
9066 access the PLT. The problem is that a call that is
9067 local won't have the +32k reloc addend trick marking
9068 -fPIC code, so the linker won't know whether r30 is
9069 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
9070 /* xgettext:c-format */
9071 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
9072 input_bfd, input_section, rel->r_offset,
9073 h->root.root.string);
9074 }
9075 break;
9076
9077 case R_PPC_DTPREL16:
9078 case R_PPC_DTPREL16_LO:
9079 case R_PPC_DTPREL16_HI:
9080 case R_PPC_DTPREL16_HA:
9081 if (htab->elf.tls_sec != NULL)
9082 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9083 break;
9084
9085 /* Relocations that may need to be propagated if this is a shared
9086 object. */
9087 case R_PPC_TPREL16:
9088 case R_PPC_TPREL16_LO:
9089 case R_PPC_TPREL16_HI:
9090 case R_PPC_TPREL16_HA:
9091 if (h != NULL
9092 && h->root.type == bfd_link_hash_undefweak
9093 && h->dynindx == -1)
9094 {
9095 /* Make this relocation against an undefined weak symbol
9096 resolve to zero. This is really just a tweak, since
9097 code using weak externs ought to check that they are
9098 defined before using them. */
9099 bfd_byte *p = contents + rel->r_offset - d_offset;
9100 unsigned int insn = bfd_get_32 (input_bfd, p);
9101 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
9102 if (insn != 0)
9103 bfd_put_32 (input_bfd, insn, p);
9104 break;
9105 }
9106 if (htab->elf.tls_sec != NULL)
9107 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9108 /* The TPREL16 relocs shouldn't really be used in shared
9109 libs or with non-local symbols as that will result in
9110 DT_TEXTREL being set, but support them anyway. */
9111 goto dodyn;
9112
9113 case R_PPC_TPREL32:
9114 if (htab->elf.tls_sec != NULL)
9115 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9116 goto dodyn;
9117
9118 case R_PPC_DTPREL32:
9119 if (htab->elf.tls_sec != NULL)
9120 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9121 goto dodyn;
9122
9123 case R_PPC_DTPMOD32:
9124 relocation = 1;
9125 addend = 0;
9126 goto dodyn;
9127
9128 case R_PPC_REL16:
9129 case R_PPC_REL16_LO:
9130 case R_PPC_REL16_HI:
9131 case R_PPC_REL16_HA:
9132 case R_PPC_REL16DX_HA:
9133 break;
9134
9135 case R_PPC_REL32:
9136 if (h == NULL || h == htab->elf.hgot)
9137 break;
9138 /* fall through */
9139
9140 case R_PPC_ADDR32:
9141 case R_PPC_ADDR16:
9142 case R_PPC_ADDR16_LO:
9143 case R_PPC_ADDR16_HI:
9144 case R_PPC_ADDR16_HA:
9145 case R_PPC_UADDR32:
9146 case R_PPC_UADDR16:
9147 goto dodyn;
9148
9149 case R_PPC_VLE_REL8:
9150 case R_PPC_VLE_REL15:
9151 case R_PPC_VLE_REL24:
9152 case R_PPC_REL24:
9153 case R_PPC_REL14:
9154 case R_PPC_REL14_BRTAKEN:
9155 case R_PPC_REL14_BRNTAKEN:
9156 /* If these relocations are not to a named symbol, they can be
9157 handled right here, no need to bother the dynamic linker. */
9158 if (SYMBOL_CALLS_LOCAL (info, h)
9159 || h == htab->elf.hgot)
9160 break;
9161 /* fall through */
9162
9163 case R_PPC_ADDR24:
9164 case R_PPC_ADDR14:
9165 case R_PPC_ADDR14_BRTAKEN:
9166 case R_PPC_ADDR14_BRNTAKEN:
9167 if (h != NULL && !bfd_link_pic (info))
9168 break;
9169 /* fall through */
9170
9171 dodyn:
9172 if ((input_section->flags & SEC_ALLOC) == 0
9173 || is_vxworks_tls)
9174 break;
9175
9176 if (bfd_link_pic (info)
9177 ? ((h == NULL
9178 || ppc_elf_hash_entry (h)->dyn_relocs != NULL)
9179 && ((h != NULL && pc_dynrelocs (h))
9180 || must_be_dyn_reloc (info, r_type)))
9181 : (h != NULL
9182 && ppc_elf_hash_entry (h)->dyn_relocs != NULL))
9183 {
9184 int skip;
9185 bfd_byte *loc;
9186 asection *sreloc;
9187 long indx = 0;
9188
9189 #ifdef DEBUG
9190 fprintf (stderr, "ppc_elf_relocate_section needs to "
9191 "create relocation for %s\n",
9192 (h && h->root.root.string
9193 ? h->root.root.string : "<unknown>"));
9194 #endif
9195
9196 /* When generating a shared object, these relocations
9197 are copied into the output file to be resolved at run
9198 time. */
9199 skip = 0;
9200 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
9201 input_section,
9202 rel->r_offset);
9203 if (outrel.r_offset == (bfd_vma) -1
9204 || outrel.r_offset == (bfd_vma) -2)
9205 skip = (int) outrel.r_offset;
9206 outrel.r_offset += (input_section->output_section->vma
9207 + input_section->output_offset);
9208
9209 if (skip)
9210 memset (&outrel, 0, sizeof outrel);
9211 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
9212 {
9213 indx = h->dynindx;
9214 BFD_ASSERT (indx != -1);
9215 unresolved_reloc = FALSE;
9216 outrel.r_info = ELF32_R_INFO (indx, r_type);
9217 outrel.r_addend = rel->r_addend;
9218 }
9219 else
9220 {
9221 outrel.r_addend = relocation + rel->r_addend;
9222
9223 if (r_type != R_PPC_ADDR32)
9224 {
9225 if (ifunc != NULL)
9226 {
9227 /* If we get here when building a static
9228 executable, then the libc startup function
9229 responsible for applying indirect function
9230 relocations is going to complain about
9231 the reloc type.
9232 If we get here when building a dynamic
9233 executable, it will be because we have
9234 a text relocation. The dynamic loader
9235 will set the text segment writable and
9236 non-executable to apply text relocations.
9237 So we'll segfault when trying to run the
9238 indirection function to resolve the reloc. */
9239 info->callbacks->einfo
9240 /* xgettext:c-format */
9241 (_("%H: relocation %s for indirect "
9242 "function %s unsupported\n"),
9243 input_bfd, input_section, rel->r_offset,
9244 howto->name,
9245 sym_name);
9246 ret = FALSE;
9247 }
9248 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
9249 ;
9250 else if (sec == NULL || sec->owner == NULL)
9251 {
9252 bfd_set_error (bfd_error_bad_value);
9253 ret = FALSE;
9254 }
9255 else
9256 {
9257 asection *osec;
9258
9259 /* We are turning this relocation into one
9260 against a section symbol. It would be
9261 proper to subtract the symbol's value,
9262 osec->vma, from the emitted reloc addend,
9263 but ld.so expects buggy relocs.
9264 FIXME: Why not always use a zero index? */
9265 osec = sec->output_section;
9266 indx = elf_section_data (osec)->dynindx;
9267 if (indx == 0)
9268 {
9269 osec = htab->elf.text_index_section;
9270 indx = elf_section_data (osec)->dynindx;
9271 }
9272 BFD_ASSERT (indx != 0);
9273 #ifdef DEBUG
9274 if (indx == 0)
9275 printf ("indx=%ld section=%s flags=%08x name=%s\n",
9276 indx, osec->name, osec->flags,
9277 h->root.root.string);
9278 #endif
9279 }
9280
9281 outrel.r_info = ELF32_R_INFO (indx, r_type);
9282 }
9283 else if (ifunc != NULL)
9284 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9285 else
9286 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9287 }
9288
9289 sreloc = elf_section_data (input_section)->sreloc;
9290 if (ifunc)
9291 {
9292 sreloc = htab->elf.irelplt;
9293 if (indx == 0)
9294 htab->local_ifunc_resolver = 1;
9295 else if (is_static_defined (h))
9296 htab->maybe_local_ifunc_resolver = 1;
9297 }
9298 if (sreloc == NULL)
9299 return FALSE;
9300
9301 loc = sreloc->contents;
9302 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
9303 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9304
9305 if (skip == -1)
9306 goto copy_reloc;
9307
9308 /* This reloc will be computed at runtime. Clear the memory
9309 so that it contains a predictable value for prelink. */
9310 if (!skip)
9311 {
9312 relocation = howto->pc_relative ? outrel.r_offset : 0;
9313 addend = 0;
9314 break;
9315 }
9316 }
9317 break;
9318
9319 case R_PPC_RELAX_PLT:
9320 case R_PPC_RELAX_PLTREL24:
9321 if (h != NULL)
9322 {
9323 struct plt_entry *ent;
9324 bfd_vma got2_addend = 0;
9325
9326 if (r_type == R_PPC_RELAX_PLTREL24)
9327 {
9328 if (bfd_link_pic (info))
9329 got2_addend = addend;
9330 addend = 0;
9331 }
9332 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9333 if (htab->plt_type == PLT_NEW)
9334 relocation = (htab->glink->output_section->vma
9335 + htab->glink->output_offset
9336 + ent->glink_offset);
9337 else
9338 relocation = (htab->elf.splt->output_section->vma
9339 + htab->elf.splt->output_offset
9340 + ent->plt.offset);
9341 }
9342 /* Fall through. */
9343
9344 case R_PPC_RELAX:
9345 {
9346 const int *stub;
9347 size_t size;
9348 size_t insn_offset = rel->r_offset;
9349 unsigned int insn;
9350
9351 if (bfd_link_pic (info))
9352 {
9353 relocation -= (input_section->output_section->vma
9354 + input_section->output_offset
9355 + rel->r_offset - 4);
9356 stub = shared_stub_entry;
9357 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9358 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9359 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9360 stub += 3;
9361 size = ARRAY_SIZE (shared_stub_entry) - 3;
9362 }
9363 else
9364 {
9365 stub = stub_entry;
9366 size = ARRAY_SIZE (stub_entry);
9367 }
9368
9369 relocation += addend;
9370 if (bfd_link_relocatable (info))
9371 relocation = 0;
9372
9373 /* First insn is HA, second is LO. */
9374 insn = *stub++;
9375 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9376 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9377 insn_offset += 4;
9378
9379 insn = *stub++;
9380 insn |= relocation & 0xffff;
9381 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9382 insn_offset += 4;
9383 size -= 2;
9384
9385 while (size != 0)
9386 {
9387 insn = *stub++;
9388 --size;
9389 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9390 insn_offset += 4;
9391 }
9392
9393 /* Rewrite the reloc and convert one of the trailing nop
9394 relocs to describe this relocation. */
9395 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9396 /* The relocs are at the bottom 2 bytes */
9397 wrel->r_offset = rel->r_offset + d_offset;
9398 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9399 wrel->r_addend = rel->r_addend;
9400 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9401 wrel++, rel++;
9402 wrel->r_offset += 4;
9403 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9404 }
9405 continue;
9406
9407 /* Indirect .sdata relocation. */
9408 case R_PPC_EMB_SDAI16:
9409 BFD_ASSERT (htab->sdata[0].section != NULL);
9410 if (!is_static_defined (htab->sdata[0].sym))
9411 {
9412 unresolved_reloc = TRUE;
9413 break;
9414 }
9415 relocation
9416 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9417 h, relocation, rel);
9418 addend = 0;
9419 break;
9420
9421 /* Indirect .sdata2 relocation. */
9422 case R_PPC_EMB_SDA2I16:
9423 BFD_ASSERT (htab->sdata[1].section != NULL);
9424 if (!is_static_defined (htab->sdata[1].sym))
9425 {
9426 unresolved_reloc = TRUE;
9427 break;
9428 }
9429 relocation
9430 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9431 h, relocation, rel);
9432 addend = 0;
9433 break;
9434
9435 /* Handle the TOC16 reloc. We want to use the offset within the .got
9436 section, not the actual VMA. This is appropriate when generating
9437 an embedded ELF object, for which the .got section acts like the
9438 AIX .toc section. */
9439 case R_PPC_TOC16: /* phony GOT16 relocations */
9440 if (sec == NULL || sec->output_section == NULL)
9441 {
9442 unresolved_reloc = TRUE;
9443 break;
9444 }
9445 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9446 ".got") == 0
9447 || strcmp (bfd_get_section_name (sec->owner, sec),
9448 ".cgot") == 0);
9449
9450 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9451 break;
9452
9453 case R_PPC_PLTREL24:
9454 if (h != NULL && ifunc == NULL)
9455 {
9456 struct plt_entry *ent;
9457
9458 ent = find_plt_ent (&h->plt.plist, got2,
9459 bfd_link_pic (info) ? addend : 0);
9460 if (ent == NULL
9461 || htab->elf.splt == NULL)
9462 {
9463 /* We didn't make a PLT entry for this symbol. This
9464 happens when statically linking PIC code, or when
9465 using -Bsymbolic. */
9466 }
9467 else
9468 {
9469 /* Relocation is to the entry for this symbol in the
9470 procedure linkage table. */
9471 unresolved_reloc = FALSE;
9472 if (htab->plt_type == PLT_NEW)
9473 relocation = (htab->glink->output_section->vma
9474 + htab->glink->output_offset
9475 + ent->glink_offset);
9476 else
9477 relocation = (htab->elf.splt->output_section->vma
9478 + htab->elf.splt->output_offset
9479 + ent->plt.offset);
9480 }
9481 }
9482
9483 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9484 addend specifies the GOT pointer offset within .got2.
9485 Don't apply it to the relocation field. */
9486 addend = 0;
9487 break;
9488
9489 case R_PPC_PLTSEQ:
9490 case R_PPC_PLTCALL:
9491 case R_PPC_PLT16_LO:
9492 case R_PPC_PLT16_HI:
9493 case R_PPC_PLT16_HA:
9494 plt_list = NULL;
9495 if (h != NULL)
9496 plt_list = &h->plt.plist;
9497 else if (ifunc != NULL)
9498 plt_list = ifunc;
9499 else if (local_got_offsets != NULL)
9500 {
9501 struct plt_entry **local_plt;
9502 local_plt = (struct plt_entry **) (local_got_offsets
9503 + symtab_hdr->sh_info);
9504 plt_list = local_plt + r_symndx;
9505 }
9506 unresolved_reloc = TRUE;
9507 if (plt_list != NULL)
9508 {
9509 struct plt_entry *ent;
9510
9511 ent = find_plt_ent (plt_list, got2,
9512 bfd_link_pic (info) ? addend : 0);
9513 if (ent != NULL && ent->plt.offset != (bfd_vma) -1)
9514 {
9515 asection *plt;
9516
9517 unresolved_reloc = FALSE;
9518 plt = htab->elf.splt;
9519 if (!htab->elf.dynamic_sections_created
9520 || h == NULL
9521 || h->dynindx == -1)
9522 {
9523 if (ifunc != NULL)
9524 plt = htab->elf.iplt;
9525 else
9526 plt = htab->pltlocal;
9527 }
9528 relocation = (plt->output_section->vma
9529 + plt->output_offset
9530 + ent->plt.offset);
9531 if (bfd_link_pic (info))
9532 {
9533 bfd_vma got = 0;
9534
9535 if (ent->addend >= 32768)
9536 got = (ent->addend
9537 + ent->sec->output_section->vma
9538 + ent->sec->output_offset);
9539 else
9540 got = SYM_VAL (htab->elf.hgot);
9541 relocation -= got;
9542 }
9543 }
9544 }
9545 addend = 0;
9546 break;
9547
9548 /* Relocate against _SDA_BASE_. */
9549 case R_PPC_SDAREL16:
9550 {
9551 const char *name;
9552 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9553
9554 if (sec == NULL
9555 || sec->output_section == NULL
9556 || !is_static_defined (sda))
9557 {
9558 unresolved_reloc = TRUE;
9559 break;
9560 }
9561 addend -= SYM_VAL (sda);
9562
9563 name = bfd_get_section_name (output_bfd, sec->output_section);
9564 if (!(strcmp (name, ".sdata") == 0
9565 || strcmp (name, ".sbss") == 0))
9566 {
9567 _bfd_error_handler
9568 /* xgettext:c-format */
9569 (_("%pB: the target (%s) of a %s relocation is "
9570 "in the wrong output section (%s)"),
9571 input_bfd,
9572 sym_name,
9573 howto->name,
9574 name);
9575 }
9576 }
9577 break;
9578
9579 /* Relocate against _SDA2_BASE_. */
9580 case R_PPC_EMB_SDA2REL:
9581 {
9582 const char *name;
9583 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9584
9585 if (sec == NULL
9586 || sec->output_section == NULL
9587 || !is_static_defined (sda))
9588 {
9589 unresolved_reloc = TRUE;
9590 break;
9591 }
9592 addend -= SYM_VAL (sda);
9593
9594 name = bfd_get_section_name (output_bfd, sec->output_section);
9595 if (!(strcmp (name, ".sdata2") == 0
9596 || strcmp (name, ".sbss2") == 0))
9597 {
9598 _bfd_error_handler
9599 /* xgettext:c-format */
9600 (_("%pB: the target (%s) of a %s relocation is "
9601 "in the wrong output section (%s)"),
9602 input_bfd,
9603 sym_name,
9604 howto->name,
9605 name);
9606 }
9607 }
9608 break;
9609
9610 case R_PPC_VLE_LO16A:
9611 relocation = relocation + addend;
9612 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9613 contents + rel->r_offset, relocation,
9614 split16a_type, htab->params->vle_reloc_fixup);
9615 goto copy_reloc;
9616
9617 case R_PPC_VLE_LO16D:
9618 relocation = relocation + addend;
9619 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9620 contents + rel->r_offset, relocation,
9621 split16d_type, htab->params->vle_reloc_fixup);
9622 goto copy_reloc;
9623
9624 case R_PPC_VLE_HI16A:
9625 relocation = (relocation + addend) >> 16;
9626 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9627 contents + rel->r_offset, relocation,
9628 split16a_type, htab->params->vle_reloc_fixup);
9629 goto copy_reloc;
9630
9631 case R_PPC_VLE_HI16D:
9632 relocation = (relocation + addend) >> 16;
9633 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9634 contents + rel->r_offset, relocation,
9635 split16d_type, htab->params->vle_reloc_fixup);
9636 goto copy_reloc;
9637
9638 case R_PPC_VLE_HA16A:
9639 relocation = (relocation + addend + 0x8000) >> 16;
9640 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9641 contents + rel->r_offset, relocation,
9642 split16a_type, htab->params->vle_reloc_fixup);
9643 goto copy_reloc;
9644
9645 case R_PPC_VLE_HA16D:
9646 relocation = (relocation + addend + 0x8000) >> 16;
9647 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9648 contents + rel->r_offset, relocation,
9649 split16d_type, htab->params->vle_reloc_fixup);
9650 goto copy_reloc;
9651
9652 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9653 case R_PPC_EMB_SDA21:
9654 case R_PPC_VLE_SDA21:
9655 case R_PPC_EMB_RELSDA:
9656 case R_PPC_VLE_SDA21_LO:
9657 {
9658 const char *name;
9659 int reg;
9660 unsigned int insn;
9661 struct elf_link_hash_entry *sda = NULL;
9662
9663 if (sec == NULL || sec->output_section == NULL)
9664 {
9665 unresolved_reloc = TRUE;
9666 break;
9667 }
9668
9669 name = bfd_get_section_name (output_bfd, sec->output_section);
9670 if (strcmp (name, ".sdata") == 0
9671 || strcmp (name, ".sbss") == 0)
9672 {
9673 reg = 13;
9674 sda = htab->sdata[0].sym;
9675 }
9676 else if (strcmp (name, ".sdata2") == 0
9677 || strcmp (name, ".sbss2") == 0)
9678 {
9679 reg = 2;
9680 sda = htab->sdata[1].sym;
9681 }
9682 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9683 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9684 {
9685 reg = 0;
9686 }
9687 else
9688 {
9689 _bfd_error_handler
9690 /* xgettext:c-format */
9691 (_("%pB: the target (%s) of a %s relocation is "
9692 "in the wrong output section (%s)"),
9693 input_bfd,
9694 sym_name,
9695 howto->name,
9696 name);
9697
9698 bfd_set_error (bfd_error_bad_value);
9699 ret = FALSE;
9700 goto copy_reloc;
9701 }
9702
9703 if (sda != NULL)
9704 {
9705 if (!is_static_defined (sda))
9706 {
9707 unresolved_reloc = TRUE;
9708 break;
9709 }
9710 addend -= SYM_VAL (sda);
9711 }
9712
9713 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9714 if (reg == 0
9715 && (r_type == R_PPC_VLE_SDA21
9716 || r_type == R_PPC_VLE_SDA21_LO))
9717 {
9718 relocation = relocation + addend;
9719 addend = 0;
9720
9721 /* Force e_li insn, keeping RT from original insn. */
9722 insn &= 0x1f << 21;
9723 insn |= 28u << 26;
9724
9725 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9726 /* Top 4 bits of value to 17..20. */
9727 insn |= (relocation & 0xf0000) >> 5;
9728 /* Next 5 bits of the value to 11..15. */
9729 insn |= (relocation & 0xf800) << 5;
9730 /* And the final 11 bits of the value to bits 21 to 31. */
9731 insn |= relocation & 0x7ff;
9732
9733 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9734
9735 if (r_type == R_PPC_VLE_SDA21
9736 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9737 goto overflow;
9738 goto copy_reloc;
9739 }
9740 else if (r_type == R_PPC_EMB_SDA21
9741 || r_type == R_PPC_VLE_SDA21
9742 || r_type == R_PPC_VLE_SDA21_LO)
9743 {
9744 /* Fill in register field. */
9745 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9746 }
9747 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9748 }
9749 break;
9750
9751 case R_PPC_VLE_SDAREL_LO16A:
9752 case R_PPC_VLE_SDAREL_LO16D:
9753 case R_PPC_VLE_SDAREL_HI16A:
9754 case R_PPC_VLE_SDAREL_HI16D:
9755 case R_PPC_VLE_SDAREL_HA16A:
9756 case R_PPC_VLE_SDAREL_HA16D:
9757 {
9758 bfd_vma value;
9759 const char *name;
9760 struct elf_link_hash_entry *sda = NULL;
9761
9762 if (sec == NULL || sec->output_section == NULL)
9763 {
9764 unresolved_reloc = TRUE;
9765 break;
9766 }
9767
9768 name = bfd_get_section_name (output_bfd, sec->output_section);
9769 if (strcmp (name, ".sdata") == 0
9770 || strcmp (name, ".sbss") == 0)
9771 sda = htab->sdata[0].sym;
9772 else if (strcmp (name, ".sdata2") == 0
9773 || strcmp (name, ".sbss2") == 0)
9774 sda = htab->sdata[1].sym;
9775 else
9776 {
9777 _bfd_error_handler
9778 /* xgettext:c-format */
9779 (_("%pB: the target (%s) of a %s relocation is "
9780 "in the wrong output section (%s)"),
9781 input_bfd,
9782 sym_name,
9783 howto->name,
9784 name);
9785
9786 bfd_set_error (bfd_error_bad_value);
9787 ret = FALSE;
9788 goto copy_reloc;
9789 }
9790
9791 if (sda == NULL || !is_static_defined (sda))
9792 {
9793 unresolved_reloc = TRUE;
9794 break;
9795 }
9796 value = relocation + addend - SYM_VAL (sda);
9797
9798 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9799 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9800 contents + rel->r_offset, value,
9801 split16a_type,
9802 htab->params->vle_reloc_fixup);
9803 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9804 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9805 contents + rel->r_offset, value,
9806 split16d_type,
9807 htab->params->vle_reloc_fixup);
9808 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9809 {
9810 value = value >> 16;
9811 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9812 contents + rel->r_offset, value,
9813 split16a_type,
9814 htab->params->vle_reloc_fixup);
9815 }
9816 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9817 {
9818 value = value >> 16;
9819 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9820 contents + rel->r_offset, value,
9821 split16d_type,
9822 htab->params->vle_reloc_fixup);
9823 }
9824 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9825 {
9826 value = (value + 0x8000) >> 16;
9827 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9828 contents + rel->r_offset, value,
9829 split16a_type,
9830 htab->params->vle_reloc_fixup);
9831 }
9832 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9833 {
9834 value = (value + 0x8000) >> 16;
9835 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9836 contents + rel->r_offset, value,
9837 split16d_type,
9838 htab->params->vle_reloc_fixup);
9839 }
9840 }
9841 goto copy_reloc;
9842
9843 case R_PPC_VLE_ADDR20:
9844 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9845 continue;
9846
9847 /* Relocate against the beginning of the section. */
9848 case R_PPC_SECTOFF:
9849 case R_PPC_SECTOFF_LO:
9850 case R_PPC_SECTOFF_HI:
9851 case R_PPC_SECTOFF_HA:
9852 if (sec == NULL || sec->output_section == NULL)
9853 {
9854 unresolved_reloc = TRUE;
9855 break;
9856 }
9857 addend -= sec->output_section->vma;
9858 break;
9859
9860 /* Negative relocations. */
9861 case R_PPC_EMB_NADDR32:
9862 case R_PPC_EMB_NADDR16:
9863 case R_PPC_EMB_NADDR16_LO:
9864 case R_PPC_EMB_NADDR16_HI:
9865 case R_PPC_EMB_NADDR16_HA:
9866 addend -= 2 * relocation;
9867 break;
9868
9869 case R_PPC_COPY:
9870 case R_PPC_GLOB_DAT:
9871 case R_PPC_JMP_SLOT:
9872 case R_PPC_RELATIVE:
9873 case R_PPC_IRELATIVE:
9874 case R_PPC_PLT32:
9875 case R_PPC_PLTREL32:
9876 case R_PPC_ADDR30:
9877 case R_PPC_EMB_RELSEC16:
9878 case R_PPC_EMB_RELST_LO:
9879 case R_PPC_EMB_RELST_HI:
9880 case R_PPC_EMB_RELST_HA:
9881 case R_PPC_EMB_BIT_FLD:
9882 /* xgettext:c-format */
9883 _bfd_error_handler (_("%pB: %s unsupported"),
9884 input_bfd, howto->name);
9885
9886 bfd_set_error (bfd_error_invalid_operation);
9887 ret = FALSE;
9888 goto copy_reloc;
9889 }
9890
9891 switch (r_type)
9892 {
9893 default:
9894 break;
9895
9896 case R_PPC_PLTCALL:
9897 if (unresolved_reloc)
9898 {
9899 bfd_byte *p = contents + rel->r_offset;
9900 unsigned int insn = bfd_get_32 (input_bfd, p);
9901 insn &= 1;
9902 bfd_put_32 (input_bfd, B | insn, p);
9903 unresolved_reloc = save_unresolved_reloc;
9904 r_type = R_PPC_REL24;
9905 howto = ppc_elf_howto_table[r_type];
9906 }
9907 else if (htab->plt_type != PLT_NEW)
9908 info->callbacks->einfo
9909 (_("%P: %H: %s relocation unsupported for bss-plt\n"),
9910 input_bfd, input_section, rel->r_offset,
9911 howto->name);
9912 break;
9913
9914 case R_PPC_PLTSEQ:
9915 case R_PPC_PLT16_HA:
9916 case R_PPC_PLT16_LO:
9917 if (unresolved_reloc)
9918 {
9919 bfd_byte *p = contents + (rel->r_offset & ~3);
9920 bfd_put_32 (input_bfd, NOP, p);
9921 unresolved_reloc = FALSE;
9922 r_type = R_PPC_NONE;
9923 howto = ppc_elf_howto_table[r_type];
9924 }
9925 else if (htab->plt_type != PLT_NEW)
9926 info->callbacks->einfo
9927 (_("%P: %H: %s relocation unsupported for bss-plt\n"),
9928 input_bfd, input_section, rel->r_offset,
9929 howto->name);
9930 break;
9931 }
9932
9933 /* Do any further special processing. */
9934 switch (r_type)
9935 {
9936 default:
9937 break;
9938
9939 case R_PPC_ADDR16_HA:
9940 case R_PPC_REL16_HA:
9941 case R_PPC_REL16DX_HA:
9942 case R_PPC_SECTOFF_HA:
9943 case R_PPC_TPREL16_HA:
9944 case R_PPC_DTPREL16_HA:
9945 case R_PPC_EMB_NADDR16_HA:
9946 case R_PPC_EMB_RELST_HA:
9947 /* It's just possible that this symbol is a weak symbol
9948 that's not actually defined anywhere. In that case,
9949 'sec' would be NULL, and we should leave the symbol
9950 alone (it will be set to zero elsewhere in the link). */
9951 if (sec == NULL)
9952 break;
9953 /* Fall through. */
9954
9955 case R_PPC_PLT16_HA:
9956 case R_PPC_GOT16_HA:
9957 case R_PPC_GOT_TLSGD16_HA:
9958 case R_PPC_GOT_TLSLD16_HA:
9959 case R_PPC_GOT_TPREL16_HA:
9960 case R_PPC_GOT_DTPREL16_HA:
9961 /* Add 0x10000 if sign bit in 0:15 is set.
9962 Bits 0:15 are not used. */
9963 addend += 0x8000;
9964 break;
9965
9966 case R_PPC_ADDR16:
9967 case R_PPC_ADDR16_LO:
9968 case R_PPC_GOT16:
9969 case R_PPC_GOT16_LO:
9970 case R_PPC_SDAREL16:
9971 case R_PPC_SECTOFF:
9972 case R_PPC_SECTOFF_LO:
9973 case R_PPC_DTPREL16:
9974 case R_PPC_DTPREL16_LO:
9975 case R_PPC_TPREL16:
9976 case R_PPC_TPREL16_LO:
9977 case R_PPC_GOT_TLSGD16:
9978 case R_PPC_GOT_TLSGD16_LO:
9979 case R_PPC_GOT_TLSLD16:
9980 case R_PPC_GOT_TLSLD16_LO:
9981 case R_PPC_GOT_DTPREL16:
9982 case R_PPC_GOT_DTPREL16_LO:
9983 case R_PPC_GOT_TPREL16:
9984 case R_PPC_GOT_TPREL16_LO:
9985 {
9986 /* The 32-bit ABI lacks proper relocations to deal with
9987 certain 64-bit instructions. Prevent damage to bits
9988 that make up part of the insn opcode. */
9989 unsigned int insn, mask, lobit;
9990
9991 insn = bfd_get_32 (input_bfd,
9992 contents + rel->r_offset - d_offset);
9993 mask = 0;
9994 if (is_insn_ds_form (insn))
9995 mask = 3;
9996 else if (is_insn_dq_form (insn))
9997 mask = 15;
9998 else
9999 break;
10000 relocation += addend;
10001 addend = insn & mask;
10002 lobit = mask & relocation;
10003 if (lobit != 0)
10004 {
10005 relocation ^= lobit;
10006 info->callbacks->einfo
10007 /* xgettext:c-format */
10008 (_("%H: error: %s against `%s' not a multiple of %u\n"),
10009 input_bfd, input_section, rel->r_offset,
10010 howto->name, sym_name, mask + 1);
10011 bfd_set_error (bfd_error_bad_value);
10012 ret = FALSE;
10013 }
10014 }
10015 break;
10016 }
10017
10018 #ifdef DEBUG
10019 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
10020 "offset = %ld, addend = %ld\n",
10021 howto->name,
10022 (int) r_type,
10023 sym_name,
10024 r_symndx,
10025 (long) rel->r_offset,
10026 (long) addend);
10027 #endif
10028
10029 if (unresolved_reloc
10030 && !((input_section->flags & SEC_DEBUGGING) != 0
10031 && h->def_dynamic)
10032 && _bfd_elf_section_offset (output_bfd, info, input_section,
10033 rel->r_offset) != (bfd_vma) -1)
10034 {
10035 info->callbacks->einfo
10036 /* xgettext:c-format */
10037 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
10038 input_bfd, input_section, rel->r_offset,
10039 howto->name,
10040 sym_name);
10041 ret = FALSE;
10042 }
10043
10044 /* 16-bit fields in insns mostly have signed values, but a
10045 few insns have 16-bit unsigned values. Really, we should
10046 have different reloc types. */
10047 if (howto->complain_on_overflow != complain_overflow_dont
10048 && howto->dst_mask == 0xffff
10049 && (input_section->flags & SEC_CODE) != 0)
10050 {
10051 enum complain_overflow complain = complain_overflow_signed;
10052
10053 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
10054 {
10055 unsigned int insn;
10056
10057 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10058 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
10059 complain = complain_overflow_bitfield;
10060 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
10061 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
10062 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
10063 complain = complain_overflow_unsigned;
10064 }
10065 if (howto->complain_on_overflow != complain)
10066 {
10067 alt_howto = *howto;
10068 alt_howto.complain_on_overflow = complain;
10069 howto = &alt_howto;
10070 }
10071 }
10072
10073 if (r_type == R_PPC_REL16DX_HA)
10074 {
10075 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
10076 if (rel->r_offset + 4 > input_section->size)
10077 r = bfd_reloc_outofrange;
10078 else
10079 {
10080 unsigned int insn;
10081
10082 relocation += addend;
10083 relocation -= (rel->r_offset
10084 + input_section->output_offset
10085 + input_section->output_section->vma);
10086 relocation >>= 16;
10087 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
10088 insn &= ~0x1fffc1;
10089 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
10090 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
10091 r = bfd_reloc_ok;
10092 }
10093 }
10094 else
10095 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
10096 rel->r_offset, relocation, addend);
10097
10098 if (r != bfd_reloc_ok)
10099 {
10100 if (r == bfd_reloc_overflow)
10101 {
10102 overflow:
10103 /* On code like "if (foo) foo();" don't report overflow
10104 on a branch to zero when foo is undefined. */
10105 if (!warned
10106 && !(h != NULL
10107 && (h->root.type == bfd_link_hash_undefweak
10108 || h->root.type == bfd_link_hash_undefined)
10109 && is_branch_reloc (r_type)))
10110 info->callbacks->reloc_overflow
10111 (info, (h ? &h->root : NULL), sym_name, howto->name,
10112 rel->r_addend, input_bfd, input_section, rel->r_offset);
10113 }
10114 else
10115 {
10116 info->callbacks->einfo
10117 /* xgettext:c-format */
10118 (_("%H: %s reloc against `%s': error %d\n"),
10119 input_bfd, input_section, rel->r_offset,
10120 howto->name, sym_name, (int) r);
10121 ret = FALSE;
10122 }
10123 }
10124 copy_reloc:
10125 if (wrel != rel)
10126 *wrel = *rel;
10127 }
10128
10129 if (wrel != rel)
10130 {
10131 Elf_Internal_Shdr *rel_hdr;
10132 size_t deleted = rel - wrel;
10133
10134 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
10135 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
10136 if (rel_hdr->sh_size == 0)
10137 {
10138 /* It is too late to remove an empty reloc section. Leave
10139 one NONE reloc.
10140 ??? What is wrong with an empty section??? */
10141 rel_hdr->sh_size = rel_hdr->sh_entsize;
10142 deleted -= 1;
10143 wrel++;
10144 }
10145 relend = wrel;
10146 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
10147 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
10148 input_section->reloc_count -= deleted;
10149 }
10150
10151 #ifdef DEBUG
10152 fprintf (stderr, "\n");
10153 #endif
10154
10155 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
10156 && input_section->size != input_section->rawsize
10157 && (strcmp (input_section->output_section->name, ".init") == 0
10158 || strcmp (input_section->output_section->name, ".fini") == 0))
10159 {
10160 /* Branch around the trampolines. */
10161 unsigned int insn = B + input_section->size - input_section->rawsize;
10162 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
10163 }
10164
10165 if (htab->params->ppc476_workaround
10166 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
10167 && (!bfd_link_relocatable (info)
10168 || (input_section->output_section->alignment_power
10169 >= htab->params->pagesize_p2)))
10170 {
10171 bfd_vma start_addr, end_addr, addr;
10172 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10173
10174 if (relax_info->workaround_size != 0)
10175 {
10176 bfd_byte *p;
10177 unsigned int n;
10178 bfd_byte fill[4];
10179
10180 bfd_put_32 (input_bfd, BA, fill);
10181 p = contents + input_section->size - relax_info->workaround_size;
10182 n = relax_info->workaround_size >> 2;
10183 while (n--)
10184 {
10185 memcpy (p, fill, 4);
10186 p += 4;
10187 }
10188 }
10189
10190 /* The idea is: Replace the last instruction on a page with a
10191 branch to a patch area. Put the insn there followed by a
10192 branch back to the next page. Complicated a little by
10193 needing to handle moved conditional branches, and by not
10194 wanting to touch data-in-text. */
10195
10196 start_addr = (input_section->output_section->vma
10197 + input_section->output_offset);
10198 end_addr = (start_addr + input_section->size
10199 - relax_info->workaround_size);
10200 for (addr = ((start_addr & -pagesize) + pagesize - 4);
10201 addr < end_addr;
10202 addr += pagesize)
10203 {
10204 bfd_vma offset = addr - start_addr;
10205 Elf_Internal_Rela *lo, *hi;
10206 bfd_boolean is_data;
10207 bfd_vma patch_off, patch_addr;
10208 unsigned int insn;
10209
10210 /* Do we have a data reloc at this offset? If so, leave
10211 the word alone. */
10212 is_data = FALSE;
10213 lo = relocs;
10214 hi = relend;
10215 rel = NULL;
10216 while (lo < hi)
10217 {
10218 rel = lo + (hi - lo) / 2;
10219 if (rel->r_offset < offset)
10220 lo = rel + 1;
10221 else if (rel->r_offset > offset + 3)
10222 hi = rel;
10223 else
10224 {
10225 switch (ELF32_R_TYPE (rel->r_info))
10226 {
10227 case R_PPC_ADDR32:
10228 case R_PPC_UADDR32:
10229 case R_PPC_REL32:
10230 case R_PPC_ADDR30:
10231 is_data = TRUE;
10232 break;
10233 default:
10234 break;
10235 }
10236 break;
10237 }
10238 }
10239 if (is_data)
10240 continue;
10241
10242 /* Some instructions can be left alone too. Unconditional
10243 branches, except for bcctr with BO=0x14 (bctr, bctrl),
10244 avoid the icache failure.
10245
10246 The problem occurs due to prefetch across a page boundary
10247 where stale instructions can be fetched from the next
10248 page, and the mechanism for flushing these bad
10249 instructions fails under certain circumstances. The
10250 unconditional branches:
10251 1) Branch: b, bl, ba, bla,
10252 2) Branch Conditional: bc, bca, bcl, bcla,
10253 3) Branch Conditional to Link Register: bclr, bclrl,
10254 where (2) and (3) have BO=0x14 making them unconditional,
10255 prevent the bad prefetch because the prefetch itself is
10256 affected by these instructions. This happens even if the
10257 instruction is not executed.
10258
10259 A bctr example:
10260 .
10261 . lis 9,new_page@ha
10262 . addi 9,9,new_page@l
10263 . mtctr 9
10264 . bctr
10265 . nop
10266 . nop
10267 . new_page:
10268 .
10269 The bctr is not predicted taken due to ctr not being
10270 ready, so prefetch continues on past the bctr into the
10271 new page which might have stale instructions. If they
10272 fail to be flushed, then they will be executed after the
10273 bctr executes. Either of the following modifications
10274 prevent the bad prefetch from happening in the first
10275 place:
10276 .
10277 . lis 9,new_page@ha lis 9,new_page@ha
10278 . addi 9,9,new_page@l addi 9,9,new_page@l
10279 . mtctr 9 mtctr 9
10280 . bctr bctr
10281 . nop b somewhere_else
10282 . b somewhere_else nop
10283 . new_page: new_page:
10284 . */
10285 insn = bfd_get_32 (input_bfd, contents + offset);
10286 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
10287 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
10288 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
10289 || ((insn & (0x3f << 26)) == (19u << 26)
10290 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
10291 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
10292 continue;
10293
10294 patch_addr = (start_addr + input_section->size
10295 - relax_info->workaround_size);
10296 patch_addr = (patch_addr + 15) & -16;
10297 patch_off = patch_addr - start_addr;
10298 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
10299
10300 if (rel != NULL
10301 && rel->r_offset >= offset
10302 && rel->r_offset < offset + 4)
10303 {
10304 asection *sreloc;
10305
10306 /* If the insn we are patching had a reloc, adjust the
10307 reloc r_offset so that the reloc applies to the moved
10308 location. This matters for -r and --emit-relocs. */
10309 if (rel + 1 != relend)
10310 {
10311 Elf_Internal_Rela tmp = *rel;
10312
10313 /* Keep the relocs sorted by r_offset. */
10314 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
10315 relend[-1] = tmp;
10316 }
10317 relend[-1].r_offset += patch_off - offset;
10318
10319 /* Adjust REL16 addends too. */
10320 switch (ELF32_R_TYPE (relend[-1].r_info))
10321 {
10322 case R_PPC_REL16:
10323 case R_PPC_REL16_LO:
10324 case R_PPC_REL16_HI:
10325 case R_PPC_REL16_HA:
10326 relend[-1].r_addend += patch_off - offset;
10327 break;
10328 default:
10329 break;
10330 }
10331
10332 /* If we are building a PIE or shared library with
10333 non-PIC objects, perhaps we had a dynamic reloc too?
10334 If so, the dynamic reloc must move with the insn. */
10335 sreloc = elf_section_data (input_section)->sreloc;
10336 if (sreloc != NULL)
10337 {
10338 Elf32_External_Rela *slo, *shi, *srelend;
10339 bfd_vma soffset;
10340
10341 slo = (Elf32_External_Rela *) sreloc->contents;
10342 shi = srelend = slo + sreloc->reloc_count;
10343 soffset = (offset + input_section->output_section->vma
10344 + input_section->output_offset);
10345 while (slo < shi)
10346 {
10347 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
10348 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
10349 &outrel);
10350 if (outrel.r_offset < soffset)
10351 slo = srel + 1;
10352 else if (outrel.r_offset > soffset + 3)
10353 shi = srel;
10354 else
10355 {
10356 if (srel + 1 != srelend)
10357 {
10358 memmove (srel, srel + 1,
10359 (srelend - (srel + 1)) * sizeof (*srel));
10360 srel = srelend - 1;
10361 }
10362 outrel.r_offset += patch_off - offset;
10363 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
10364 (bfd_byte *) srel);
10365 break;
10366 }
10367 }
10368 }
10369 }
10370 else
10371 rel = NULL;
10372
10373 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
10374 && (insn & 2) == 0 /* relative */)
10375 {
10376 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
10377
10378 delta += offset - patch_off;
10379 if (bfd_link_relocatable (info) && rel != NULL)
10380 delta = 0;
10381 if (!bfd_link_relocatable (info) && rel != NULL)
10382 {
10383 enum elf_ppc_reloc_type r_type;
10384
10385 r_type = ELF32_R_TYPE (relend[-1].r_info);
10386 if (r_type == R_PPC_REL14_BRTAKEN)
10387 insn |= BRANCH_PREDICT_BIT;
10388 else if (r_type == R_PPC_REL14_BRNTAKEN)
10389 insn &= ~BRANCH_PREDICT_BIT;
10390 else
10391 BFD_ASSERT (r_type == R_PPC_REL14);
10392
10393 if ((r_type == R_PPC_REL14_BRTAKEN
10394 || r_type == R_PPC_REL14_BRNTAKEN)
10395 && delta + 0x8000 < 0x10000
10396 && (bfd_signed_vma) delta < 0)
10397 insn ^= BRANCH_PREDICT_BIT;
10398 }
10399 if (delta + 0x8000 < 0x10000)
10400 {
10401 bfd_put_32 (input_bfd,
10402 (insn & ~0xfffc) | (delta & 0xfffc),
10403 contents + patch_off);
10404 patch_off += 4;
10405 bfd_put_32 (input_bfd,
10406 B | ((offset + 4 - patch_off) & 0x3fffffc),
10407 contents + patch_off);
10408 patch_off += 4;
10409 }
10410 else
10411 {
10412 if (rel != NULL)
10413 {
10414 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10415
10416 relend[-1].r_offset += 8;
10417 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10418 }
10419 bfd_put_32 (input_bfd,
10420 (insn & ~0xfffc) | 8,
10421 contents + patch_off);
10422 patch_off += 4;
10423 bfd_put_32 (input_bfd,
10424 B | ((offset + 4 - patch_off) & 0x3fffffc),
10425 contents + patch_off);
10426 patch_off += 4;
10427 bfd_put_32 (input_bfd,
10428 B | ((delta - 8) & 0x3fffffc),
10429 contents + patch_off);
10430 patch_off += 4;
10431 }
10432 }
10433 else
10434 {
10435 bfd_put_32 (input_bfd, insn, contents + patch_off);
10436 patch_off += 4;
10437 bfd_put_32 (input_bfd,
10438 B | ((offset + 4 - patch_off) & 0x3fffffc),
10439 contents + patch_off);
10440 patch_off += 4;
10441 }
10442 BFD_ASSERT (patch_off <= input_section->size);
10443 relax_info->workaround_size = input_section->size - patch_off;
10444 }
10445 }
10446
10447 return ret;
10448 }
10449 \f
10450 /* Write out the PLT relocs and entries for H. */
10451
10452 static bfd_boolean
10453 write_global_sym_plt (struct elf_link_hash_entry *h, void *inf)
10454 {
10455 struct bfd_link_info *info = (struct bfd_link_info *) inf;
10456 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10457 struct plt_entry *ent;
10458 bfd_boolean doneone;
10459
10460 doneone = FALSE;
10461 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10462 if (ent->plt.offset != (bfd_vma) -1)
10463 {
10464 if (!doneone)
10465 {
10466 Elf_Internal_Rela rela;
10467 bfd_byte *loc;
10468 bfd_vma reloc_index;
10469 asection *plt = htab->elf.splt;
10470 asection *relplt = htab->elf.srelplt;
10471
10472 if (htab->plt_type == PLT_NEW
10473 || !htab->elf.dynamic_sections_created
10474 || h->dynindx == -1)
10475 reloc_index = ent->plt.offset / 4;
10476 else
10477 {
10478 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10479 / htab->plt_slot_size);
10480 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10481 && htab->plt_type == PLT_OLD)
10482 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10483 }
10484
10485 /* This symbol has an entry in the procedure linkage table.
10486 Set it up. */
10487 if (htab->plt_type == PLT_VXWORKS
10488 && htab->elf.dynamic_sections_created
10489 && h->dynindx != -1)
10490 {
10491 bfd_vma got_offset;
10492 const bfd_vma *plt_entry;
10493
10494 /* The first three entries in .got.plt are reserved. */
10495 got_offset = (reloc_index + 3) * 4;
10496
10497 /* Use the right PLT. */
10498 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10499 : ppc_elf_vxworks_plt_entry;
10500
10501 /* Fill in the .plt on VxWorks. */
10502 if (bfd_link_pic (info))
10503 {
10504 bfd_put_32 (info->output_bfd,
10505 plt_entry[0] | PPC_HA (got_offset),
10506 plt->contents + ent->plt.offset + 0);
10507 bfd_put_32 (info->output_bfd,
10508 plt_entry[1] | PPC_LO (got_offset),
10509 plt->contents + ent->plt.offset + 4);
10510 }
10511 else
10512 {
10513 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10514
10515 bfd_put_32 (info->output_bfd,
10516 plt_entry[0] | PPC_HA (got_loc),
10517 plt->contents + ent->plt.offset + 0);
10518 bfd_put_32 (info->output_bfd,
10519 plt_entry[1] | PPC_LO (got_loc),
10520 plt->contents + ent->plt.offset + 4);
10521 }
10522
10523 bfd_put_32 (info->output_bfd, plt_entry[2],
10524 plt->contents + ent->plt.offset + 8);
10525 bfd_put_32 (info->output_bfd, plt_entry[3],
10526 plt->contents + ent->plt.offset + 12);
10527
10528 /* This instruction is an immediate load. The value loaded is
10529 the byte offset of the R_PPC_JMP_SLOT relocation from the
10530 start of the .rela.plt section. The value is stored in the
10531 low-order 16 bits of the load instruction. */
10532 /* NOTE: It appears that this is now an index rather than a
10533 prescaled offset. */
10534 bfd_put_32 (info->output_bfd,
10535 plt_entry[4] | reloc_index,
10536 plt->contents + ent->plt.offset + 16);
10537 /* This instruction is a PC-relative branch whose target is
10538 the start of the PLT section. The address of this branch
10539 instruction is 20 bytes beyond the start of this PLT entry.
10540 The address is encoded in bits 6-29, inclusive. The value
10541 stored is right-shifted by two bits, permitting a 26-bit
10542 offset. */
10543 bfd_put_32 (info->output_bfd,
10544 (plt_entry[5]
10545 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10546 plt->contents + ent->plt.offset + 20);
10547 bfd_put_32 (info->output_bfd, plt_entry[6],
10548 plt->contents + ent->plt.offset + 24);
10549 bfd_put_32 (info->output_bfd, plt_entry[7],
10550 plt->contents + ent->plt.offset + 28);
10551
10552 /* Fill in the GOT entry corresponding to this PLT slot with
10553 the address immediately after the "bctr" instruction
10554 in this PLT entry. */
10555 bfd_put_32 (info->output_bfd, (plt->output_section->vma
10556 + plt->output_offset
10557 + ent->plt.offset + 16),
10558 htab->elf.sgotplt->contents + got_offset);
10559
10560 if (!bfd_link_pic (info))
10561 {
10562 /* Fill in a couple of entries in .rela.plt.unloaded. */
10563 loc = htab->srelplt2->contents
10564 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10565 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10566 * sizeof (Elf32_External_Rela));
10567
10568 /* Provide the @ha relocation for the first instruction. */
10569 rela.r_offset = (plt->output_section->vma
10570 + plt->output_offset
10571 + ent->plt.offset + 2);
10572 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10573 R_PPC_ADDR16_HA);
10574 rela.r_addend = got_offset;
10575 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10576 loc += sizeof (Elf32_External_Rela);
10577
10578 /* Provide the @l relocation for the second instruction. */
10579 rela.r_offset = (plt->output_section->vma
10580 + plt->output_offset
10581 + ent->plt.offset + 6);
10582 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10583 R_PPC_ADDR16_LO);
10584 rela.r_addend = got_offset;
10585 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10586 loc += sizeof (Elf32_External_Rela);
10587
10588 /* Provide a relocation for the GOT entry corresponding to this
10589 PLT slot. Point it at the middle of the .plt entry. */
10590 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10591 + htab->elf.sgotplt->output_offset
10592 + got_offset);
10593 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10594 R_PPC_ADDR32);
10595 rela.r_addend = ent->plt.offset + 16;
10596 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10597 }
10598
10599 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10600 In particular, the offset for the relocation is not the
10601 address of the PLT entry for this function, as specified
10602 by the ABI. Instead, the offset is set to the address of
10603 the GOT slot for this function. See EABI 4.4.4.1. */
10604 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10605 + htab->elf.sgotplt->output_offset
10606 + got_offset);
10607 rela.r_addend = 0;
10608 }
10609 else
10610 {
10611 rela.r_addend = 0;
10612 if (!htab->elf.dynamic_sections_created
10613 || h->dynindx == -1)
10614 {
10615 if (h->type == STT_GNU_IFUNC)
10616 {
10617 plt = htab->elf.iplt;
10618 relplt = htab->elf.irelplt;
10619 }
10620 else
10621 {
10622 plt = htab->pltlocal;
10623 relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL;
10624 }
10625 if (h->def_regular
10626 && (h->root.type == bfd_link_hash_defined
10627 || h->root.type == bfd_link_hash_defweak))
10628 rela.r_addend = SYM_VAL (h);
10629 }
10630
10631 if (relplt == NULL)
10632 {
10633 loc = plt->contents + ent->plt.offset;
10634 bfd_put_32 (info->output_bfd, rela.r_addend, loc);
10635 }
10636 else
10637 {
10638 rela.r_offset = (plt->output_section->vma
10639 + plt->output_offset
10640 + ent->plt.offset);
10641
10642 if (htab->plt_type == PLT_OLD
10643 || !htab->elf.dynamic_sections_created
10644 || h->dynindx == -1)
10645 {
10646 /* We don't need to fill in the .plt. The ppc dynamic
10647 linker will fill it in. */
10648 }
10649 else
10650 {
10651 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10652 + htab->glink->output_section->vma
10653 + htab->glink->output_offset);
10654 bfd_put_32 (info->output_bfd, val,
10655 plt->contents + ent->plt.offset);
10656 }
10657 }
10658 }
10659
10660 if (relplt != NULL)
10661 {
10662 /* Fill in the entry in the .rela.plt section. */
10663 if (!htab->elf.dynamic_sections_created
10664 || h->dynindx == -1)
10665 {
10666 if (h->type == STT_GNU_IFUNC)
10667 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10668 else
10669 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
10670 loc = relplt->contents + (relplt->reloc_count++
10671 * sizeof (Elf32_External_Rela));
10672 htab->local_ifunc_resolver = 1;
10673 }
10674 else
10675 {
10676 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10677 loc = relplt->contents + (reloc_index
10678 * sizeof (Elf32_External_Rela));
10679 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10680 htab->maybe_local_ifunc_resolver = 1;
10681 }
10682 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10683 }
10684 doneone = TRUE;
10685 }
10686
10687 if (htab->plt_type == PLT_NEW
10688 || !htab->elf.dynamic_sections_created
10689 || h->dynindx == -1)
10690 {
10691 unsigned char *p;
10692 asection *plt = htab->elf.splt;
10693
10694 if (!htab->elf.dynamic_sections_created
10695 || h->dynindx == -1)
10696 {
10697 if (h->type == STT_GNU_IFUNC)
10698 plt = htab->elf.iplt;
10699 else
10700 break;
10701 }
10702
10703 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10704 write_glink_stub (h, ent, plt, p, info);
10705
10706 if (!bfd_link_pic (info))
10707 /* We only need one non-PIC glink stub. */
10708 break;
10709 }
10710 else
10711 break;
10712 }
10713 return TRUE;
10714 }
10715
10716 /* Finish up PLT handling. */
10717
10718 bfd_boolean
10719 ppc_finish_symbols (struct bfd_link_info *info)
10720 {
10721 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10722 bfd *ibfd;
10723
10724 if (!htab)
10725 return TRUE;
10726
10727 elf_link_hash_traverse (&htab->elf, write_global_sym_plt, info);
10728
10729 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10730 {
10731 bfd_vma *local_got, *end_local_got;
10732 struct plt_entry **local_plt, **lplt, **end_local_plt;
10733 Elf_Internal_Shdr *symtab_hdr;
10734 bfd_size_type locsymcount;
10735 Elf_Internal_Sym *local_syms = NULL;
10736 struct plt_entry *ent;
10737
10738 if (!is_ppc_elf (ibfd))
10739 continue;
10740
10741 local_got = elf_local_got_offsets (ibfd);
10742 if (!local_got)
10743 continue;
10744
10745 symtab_hdr = &elf_symtab_hdr (ibfd);
10746 locsymcount = symtab_hdr->sh_info;
10747 end_local_got = local_got + locsymcount;
10748 local_plt = (struct plt_entry **) end_local_got;
10749 end_local_plt = local_plt + locsymcount;
10750 for (lplt = local_plt; lplt < end_local_plt; ++lplt)
10751 for (ent = *lplt; ent != NULL; ent = ent->next)
10752 {
10753 if (ent->plt.offset != (bfd_vma) -1)
10754 {
10755 Elf_Internal_Sym *sym;
10756 asection *sym_sec;
10757 asection *plt, *relplt;
10758 bfd_byte *loc;
10759 bfd_vma val;
10760 Elf_Internal_Rela rela;
10761
10762 if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms,
10763 lplt - local_plt, ibfd))
10764 {
10765 if (local_syms != NULL
10766 && symtab_hdr->contents != (unsigned char *) local_syms)
10767 free (local_syms);
10768 return FALSE;
10769 }
10770
10771 val = sym->st_value;
10772 if (sym_sec != NULL && sym_sec->output_section != NULL)
10773 val += sym_sec->output_offset + sym_sec->output_section->vma;
10774
10775 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
10776 {
10777 htab->local_ifunc_resolver = 1;
10778 plt = htab->elf.iplt;
10779 relplt = htab->elf.irelplt;
10780 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10781 }
10782 else
10783 {
10784 plt = htab->pltlocal;
10785 if (bfd_link_pic (info))
10786 {
10787 relplt = htab->relpltlocal;
10788 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
10789 }
10790 else
10791 {
10792 loc = plt->contents + ent->plt.offset;
10793 bfd_put_32 (info->output_bfd, val, loc);
10794 continue;
10795 }
10796 }
10797
10798 rela.r_offset = (ent->plt.offset
10799 + plt->output_offset
10800 + plt->output_section->vma);
10801 rela.r_addend = val;
10802 loc = relplt->contents + (relplt->reloc_count++
10803 * sizeof (Elf32_External_Rela));
10804 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10805 }
10806 if ((ent->glink_offset & 1) == 0)
10807 {
10808 unsigned char *p = ((unsigned char *) htab->glink->contents
10809 + ent->glink_offset);
10810
10811 write_glink_stub (NULL, ent, htab->elf.iplt, p, info);
10812 ent->glink_offset |= 1;
10813 }
10814 }
10815
10816 if (local_syms != NULL
10817 && symtab_hdr->contents != (unsigned char *) local_syms)
10818 {
10819 if (!info->keep_memory)
10820 free (local_syms);
10821 else
10822 symtab_hdr->contents = (unsigned char *) local_syms;
10823 }
10824 }
10825 return TRUE;
10826 }
10827
10828 /* Finish up dynamic symbol handling. We set the contents of various
10829 dynamic sections here. */
10830
10831 static bfd_boolean
10832 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10833 struct bfd_link_info *info,
10834 struct elf_link_hash_entry *h,
10835 Elf_Internal_Sym *sym)
10836 {
10837 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10838 struct plt_entry *ent;
10839
10840 #ifdef DEBUG
10841 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10842 h->root.root.string);
10843 #endif
10844
10845 if (!h->def_regular
10846 || (h->type == STT_GNU_IFUNC && !bfd_link_pic (info)))
10847 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10848 if (ent->plt.offset != (bfd_vma) -1)
10849 {
10850 if (!h->def_regular)
10851 {
10852 /* Mark the symbol as undefined, rather than as
10853 defined in the .plt section. Leave the value if
10854 there were any relocations where pointer equality
10855 matters (this is a clue for the dynamic linker, to
10856 make function pointer comparisons work between an
10857 application and shared library), otherwise set it
10858 to zero. */
10859 sym->st_shndx = SHN_UNDEF;
10860 if (!h->pointer_equality_needed)
10861 sym->st_value = 0;
10862 else if (!h->ref_regular_nonweak)
10863 {
10864 /* This breaks function pointer comparisons, but
10865 that is better than breaking tests for a NULL
10866 function pointer. */
10867 sym->st_value = 0;
10868 }
10869 }
10870 else
10871 {
10872 /* Set the value of ifunc symbols in a non-pie
10873 executable to the glink entry. This is to avoid
10874 text relocations. We can't do this for ifunc in
10875 allocate_dynrelocs, as we do for normal dynamic
10876 function symbols with plt entries, because we need
10877 to keep the original value around for the ifunc
10878 relocation. */
10879 sym->st_shndx
10880 = (_bfd_elf_section_from_bfd_section
10881 (info->output_bfd, htab->glink->output_section));
10882 sym->st_value = (ent->glink_offset
10883 + htab->glink->output_offset
10884 + htab->glink->output_section->vma);
10885 }
10886 break;
10887 }
10888
10889 if (h->needs_copy)
10890 {
10891 asection *s;
10892 Elf_Internal_Rela rela;
10893 bfd_byte *loc;
10894
10895 /* This symbols needs a copy reloc. Set it up. */
10896
10897 #ifdef DEBUG
10898 fprintf (stderr, ", copy");
10899 #endif
10900
10901 BFD_ASSERT (h->dynindx != -1);
10902
10903 if (ppc_elf_hash_entry (h)->has_sda_refs)
10904 s = htab->relsbss;
10905 else if (h->root.u.def.section == htab->elf.sdynrelro)
10906 s = htab->elf.sreldynrelro;
10907 else
10908 s = htab->elf.srelbss;
10909 BFD_ASSERT (s != NULL);
10910
10911 rela.r_offset = SYM_VAL (h);
10912 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10913 rela.r_addend = 0;
10914 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10915 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10916 }
10917
10918 #ifdef DEBUG
10919 fprintf (stderr, "\n");
10920 #endif
10921
10922 return TRUE;
10923 }
10924 \f
10925 static enum elf_reloc_type_class
10926 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10927 const asection *rel_sec,
10928 const Elf_Internal_Rela *rela)
10929 {
10930 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10931
10932 if (rel_sec == htab->elf.irelplt)
10933 return reloc_class_ifunc;
10934
10935 switch (ELF32_R_TYPE (rela->r_info))
10936 {
10937 case R_PPC_RELATIVE:
10938 return reloc_class_relative;
10939 case R_PPC_JMP_SLOT:
10940 return reloc_class_plt;
10941 case R_PPC_COPY:
10942 return reloc_class_copy;
10943 default:
10944 return reloc_class_normal;
10945 }
10946 }
10947 \f
10948 /* Finish up the dynamic sections. */
10949
10950 static bfd_boolean
10951 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10952 struct bfd_link_info *info)
10953 {
10954 asection *sdyn;
10955 struct ppc_elf_link_hash_table *htab;
10956 bfd_vma got;
10957 bfd *dynobj;
10958 bfd_boolean ret = TRUE;
10959
10960 #ifdef DEBUG
10961 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10962 #endif
10963
10964 htab = ppc_elf_hash_table (info);
10965 dynobj = htab->elf.dynobj;
10966 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10967
10968 got = 0;
10969 if (htab->elf.hgot != NULL)
10970 got = SYM_VAL (htab->elf.hgot);
10971
10972 if (htab->elf.dynamic_sections_created)
10973 {
10974 Elf32_External_Dyn *dyncon, *dynconend;
10975
10976 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10977
10978 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10979 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10980 for (; dyncon < dynconend; dyncon++)
10981 {
10982 Elf_Internal_Dyn dyn;
10983 asection *s;
10984
10985 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10986
10987 switch (dyn.d_tag)
10988 {
10989 case DT_PLTGOT:
10990 if (htab->is_vxworks)
10991 s = htab->elf.sgotplt;
10992 else
10993 s = htab->elf.splt;
10994 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10995 break;
10996
10997 case DT_PLTRELSZ:
10998 dyn.d_un.d_val = htab->elf.srelplt->size;
10999 break;
11000
11001 case DT_JMPREL:
11002 s = htab->elf.srelplt;
11003 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11004 break;
11005
11006 case DT_PPC_GOT:
11007 dyn.d_un.d_ptr = got;
11008 break;
11009
11010 case DT_TEXTREL:
11011 if (htab->local_ifunc_resolver)
11012 info->callbacks->einfo
11013 (_("%X%P: text relocations and GNU indirect "
11014 "functions will result in a segfault at runtime\n"));
11015 else if (htab->maybe_local_ifunc_resolver)
11016 info->callbacks->einfo
11017 (_("%P: warning: text relocations and GNU indirect "
11018 "functions may result in a segfault at runtime\n"));
11019 continue;
11020
11021 default:
11022 if (htab->is_vxworks
11023 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
11024 break;
11025 continue;
11026 }
11027
11028 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
11029 }
11030 }
11031
11032 if (htab->elf.sgot != NULL
11033 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
11034 {
11035 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
11036 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
11037 {
11038 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
11039
11040 p += htab->elf.hgot->root.u.def.value;
11041 if (htab->plt_type == PLT_OLD)
11042 {
11043 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
11044 so that a function can easily find the address of
11045 _GLOBAL_OFFSET_TABLE_. */
11046 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
11047 < htab->elf.hgot->root.u.def.section->size);
11048 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
11049 }
11050
11051 if (sdyn != NULL)
11052 {
11053 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
11054 BFD_ASSERT (htab->elf.hgot->root.u.def.value
11055 < htab->elf.hgot->root.u.def.section->size);
11056 bfd_put_32 (output_bfd, val, p);
11057 }
11058 }
11059 else
11060 {
11061 /* xgettext:c-format */
11062 _bfd_error_handler (_("%s not defined in linker created %pA"),
11063 htab->elf.hgot->root.root.string,
11064 (htab->elf.sgotplt != NULL
11065 ? htab->elf.sgotplt : htab->elf.sgot));
11066 bfd_set_error (bfd_error_bad_value);
11067 ret = FALSE;
11068 }
11069
11070 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
11071 }
11072
11073 /* Fill in the first entry in the VxWorks procedure linkage table. */
11074 if (htab->is_vxworks
11075 && htab->elf.splt != NULL
11076 && htab->elf.splt->size != 0
11077 && htab->elf.splt->output_section != bfd_abs_section_ptr)
11078 {
11079 asection *splt = htab->elf.splt;
11080 /* Use the right PLT. */
11081 const bfd_vma *plt_entry = (bfd_link_pic (info)
11082 ? ppc_elf_vxworks_pic_plt0_entry
11083 : ppc_elf_vxworks_plt0_entry);
11084
11085 if (!bfd_link_pic (info))
11086 {
11087 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
11088
11089 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
11090 splt->contents + 0);
11091 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
11092 splt->contents + 4);
11093 }
11094 else
11095 {
11096 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
11097 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
11098 }
11099 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
11100 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
11101 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
11102 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
11103 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
11104 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
11105
11106 if (! bfd_link_pic (info))
11107 {
11108 Elf_Internal_Rela rela;
11109 bfd_byte *loc;
11110
11111 loc = htab->srelplt2->contents;
11112
11113 /* Output the @ha relocation for the first instruction. */
11114 rela.r_offset = (htab->elf.splt->output_section->vma
11115 + htab->elf.splt->output_offset
11116 + 2);
11117 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
11118 rela.r_addend = 0;
11119 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11120 loc += sizeof (Elf32_External_Rela);
11121
11122 /* Output the @l relocation for the second instruction. */
11123 rela.r_offset = (htab->elf.splt->output_section->vma
11124 + htab->elf.splt->output_offset
11125 + 6);
11126 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
11127 rela.r_addend = 0;
11128 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11129 loc += sizeof (Elf32_External_Rela);
11130
11131 /* Fix up the remaining relocations. They may have the wrong
11132 symbol index for _G_O_T_ or _P_L_T_ depending on the order
11133 in which symbols were output. */
11134 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
11135 {
11136 Elf_Internal_Rela rel;
11137
11138 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11139 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
11140 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11141 loc += sizeof (Elf32_External_Rela);
11142
11143 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11144 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
11145 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11146 loc += sizeof (Elf32_External_Rela);
11147
11148 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11149 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
11150 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11151 loc += sizeof (Elf32_External_Rela);
11152 }
11153 }
11154 }
11155
11156 if (htab->glink != NULL
11157 && htab->glink->contents != NULL
11158 && htab->elf.dynamic_sections_created)
11159 {
11160 unsigned char *p;
11161 unsigned char *endp;
11162 bfd_vma res0;
11163
11164 /*
11165 * PIC glink code is the following:
11166 *
11167 * # ith PLT code stub.
11168 * addis 11,30,(plt+(i-1)*4-got)@ha
11169 * lwz 11,(plt+(i-1)*4-got)@l(11)
11170 * mtctr 11
11171 * bctr
11172 *
11173 * # A table of branches, one for each plt entry.
11174 * # The idea is that the plt call stub loads ctr and r11 with these
11175 * # addresses, so (r11 - res_0) gives the plt index * 4.
11176 * res_0: b PLTresolve
11177 * res_1: b PLTresolve
11178 * .
11179 * # Some number of entries towards the end can be nops
11180 * res_n_m3: nop
11181 * res_n_m2: nop
11182 * res_n_m1:
11183 *
11184 * PLTresolve:
11185 * addis 11,11,(1f-res_0)@ha
11186 * mflr 0
11187 * bcl 20,31,1f
11188 * 1: addi 11,11,(1b-res_0)@l
11189 * mflr 12
11190 * mtlr 0
11191 * sub 11,11,12 # r11 = index * 4
11192 * addis 12,12,(got+4-1b)@ha
11193 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
11194 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
11195 * mtctr 0
11196 * add 0,11,11
11197 * add 11,0,11 # r11 = index * 12 = reloc offset.
11198 * bctr
11199 *
11200 * Non-PIC glink code is a little simpler.
11201 *
11202 * # ith PLT code stub.
11203 * lis 11,(plt+(i-1)*4)@ha
11204 * lwz 11,(plt+(i-1)*4)@l(11)
11205 * mtctr 11
11206 * bctr
11207 *
11208 * The branch table is the same, then comes
11209 *
11210 * PLTresolve:
11211 * lis 12,(got+4)@ha
11212 * addis 11,11,(-res_0)@ha
11213 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
11214 * addi 11,11,(-res_0)@l # r11 = index * 4
11215 * mtctr 0
11216 * add 0,11,11
11217 * lwz 12,(got+8)@l(12) # got[2] contains the map address
11218 * add 11,0,11 # r11 = index * 12 = reloc offset.
11219 * bctr
11220 */
11221
11222 /* Build the branch table, one for each plt entry (less one),
11223 and perhaps some padding. */
11224 p = htab->glink->contents;
11225 p += htab->glink_pltresolve;
11226 endp = htab->glink->contents;
11227 endp += htab->glink->size - GLINK_PLTRESOLVE;
11228 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
11229 {
11230 bfd_put_32 (output_bfd, B + endp - p, p);
11231 p += 4;
11232 }
11233 while (p < endp)
11234 {
11235 bfd_put_32 (output_bfd, NOP, p);
11236 p += 4;
11237 }
11238
11239 res0 = (htab->glink_pltresolve
11240 + htab->glink->output_section->vma
11241 + htab->glink->output_offset);
11242
11243 if (htab->params->ppc476_workaround)
11244 {
11245 /* Ensure that a call stub at the end of a page doesn't
11246 result in prefetch over the end of the page into the
11247 glink branch table. */
11248 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
11249 bfd_vma page_addr;
11250 bfd_vma glink_start = (htab->glink->output_section->vma
11251 + htab->glink->output_offset);
11252
11253 for (page_addr = res0 & -pagesize;
11254 page_addr > glink_start;
11255 page_addr -= pagesize)
11256 {
11257 /* We have a plt call stub that may need fixing. */
11258 bfd_byte *loc;
11259 unsigned int insn;
11260
11261 loc = htab->glink->contents + page_addr - 4 - glink_start;
11262 insn = bfd_get_32 (output_bfd, loc);
11263 if (insn == BCTR)
11264 {
11265 /* By alignment, we know that there must be at least
11266 one other call stub before this one. */
11267 insn = bfd_get_32 (output_bfd, loc - 16);
11268 if (insn == BCTR)
11269 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
11270 else
11271 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
11272 }
11273 }
11274 }
11275
11276 /* Last comes the PLTresolve stub. */
11277 endp = p + GLINK_PLTRESOLVE;
11278 if (bfd_link_pic (info))
11279 {
11280 bfd_vma bcl;
11281
11282 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
11283 + htab->glink->output_section->vma
11284 + htab->glink->output_offset);
11285
11286 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (bcl - res0), p);
11287 p += 4;
11288 bfd_put_32 (output_bfd, MFLR_0, p);
11289 p += 4;
11290 bfd_put_32 (output_bfd, BCL_20_31, p);
11291 p += 4;
11292 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (bcl - res0), p);
11293 p += 4;
11294 bfd_put_32 (output_bfd, MFLR_12, p);
11295 p += 4;
11296 bfd_put_32 (output_bfd, MTLR_0, p);
11297 p += 4;
11298 bfd_put_32 (output_bfd, SUB_11_11_12, p);
11299 p += 4;
11300 bfd_put_32 (output_bfd, ADDIS_12_12 + PPC_HA (got + 4 - bcl), p);
11301 p += 4;
11302 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
11303 {
11304 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4 - bcl), p);
11305 p += 4;
11306 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8 - bcl), p);
11307 p += 4;
11308 }
11309 else
11310 {
11311 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4 - bcl), p);
11312 p += 4;
11313 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
11314 p += 4;
11315 }
11316 bfd_put_32 (output_bfd, MTCTR_0, p);
11317 p += 4;
11318 bfd_put_32 (output_bfd, ADD_0_11_11, p);
11319 }
11320 else
11321 {
11322 bfd_put_32 (output_bfd, LIS_12 + PPC_HA (got + 4), p);
11323 p += 4;
11324 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (-res0), p);
11325 p += 4;
11326 if (PPC_HA (got + 4) == PPC_HA (got + 8))
11327 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4), p);
11328 else
11329 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4), p);
11330 p += 4;
11331 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (-res0), p);
11332 p += 4;
11333 bfd_put_32 (output_bfd, MTCTR_0, p);
11334 p += 4;
11335 bfd_put_32 (output_bfd, ADD_0_11_11, p);
11336 p += 4;
11337 if (PPC_HA (got + 4) == PPC_HA (got + 8))
11338 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8), p);
11339 else
11340 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
11341 }
11342 p += 4;
11343 bfd_put_32 (output_bfd, ADD_11_0_11, p);
11344 p += 4;
11345 bfd_put_32 (output_bfd, BCTR, p);
11346 p += 4;
11347 while (p < endp)
11348 {
11349 bfd_put_32 (output_bfd,
11350 htab->params->ppc476_workaround ? BA : NOP, p);
11351 p += 4;
11352 }
11353 BFD_ASSERT (p == endp);
11354 }
11355
11356 if (htab->glink_eh_frame != NULL
11357 && htab->glink_eh_frame->contents != NULL)
11358 {
11359 unsigned char *p = htab->glink_eh_frame->contents;
11360 bfd_vma val;
11361
11362 p += sizeof (glink_eh_frame_cie);
11363 /* FDE length. */
11364 p += 4;
11365 /* CIE pointer. */
11366 p += 4;
11367 /* Offset to .glink. */
11368 val = (htab->glink->output_section->vma
11369 + htab->glink->output_offset);
11370 val -= (htab->glink_eh_frame->output_section->vma
11371 + htab->glink_eh_frame->output_offset);
11372 val -= p - htab->glink_eh_frame->contents;
11373 bfd_put_32 (htab->elf.dynobj, val, p);
11374
11375 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
11376 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
11377 htab->glink_eh_frame,
11378 htab->glink_eh_frame->contents))
11379 return FALSE;
11380 }
11381
11382 return ret;
11383 }
11384 \f
11385 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
11386 #define TARGET_LITTLE_NAME "elf32-powerpcle"
11387 #define TARGET_BIG_SYM powerpc_elf32_vec
11388 #define TARGET_BIG_NAME "elf32-powerpc"
11389 #define ELF_ARCH bfd_arch_powerpc
11390 #define ELF_TARGET_ID PPC32_ELF_DATA
11391 #define ELF_MACHINE_CODE EM_PPC
11392 #define ELF_MAXPAGESIZE 0x10000
11393 #define ELF_COMMONPAGESIZE 0x1000
11394 #define ELF_RELROPAGESIZE ELF_MAXPAGESIZE
11395 #define elf_info_to_howto ppc_elf_info_to_howto
11396
11397 #ifdef EM_CYGNUS_POWERPC
11398 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
11399 #endif
11400
11401 #ifdef EM_PPC_OLD
11402 #define ELF_MACHINE_ALT2 EM_PPC_OLD
11403 #endif
11404
11405 #define elf_backend_plt_not_loaded 1
11406 #define elf_backend_want_dynrelro 1
11407 #define elf_backend_can_gc_sections 1
11408 #define elf_backend_can_refcount 1
11409 #define elf_backend_rela_normal 1
11410 #define elf_backend_caches_rawsize 1
11411
11412 #define bfd_elf32_mkobject ppc_elf_mkobject
11413 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
11414 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
11415 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
11416 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
11417 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
11418 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
11419 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
11420
11421 #define elf_backend_object_p ppc_elf_object_p
11422 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
11423 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
11424 #define elf_backend_relocate_section ppc_elf_relocate_section
11425 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
11426 #define elf_backend_check_relocs ppc_elf_check_relocs
11427 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
11428 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
11429 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
11430 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
11431 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
11432 #define elf_backend_hash_symbol ppc_elf_hash_symbol
11433 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
11434 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
11435 #define elf_backend_fake_sections ppc_elf_fake_sections
11436 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
11437 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
11438 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
11439 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
11440 #define elf_backend_write_core_note ppc_elf_write_core_note
11441 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
11442 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
11443 #define elf_backend_final_write_processing ppc_elf_final_write_processing
11444 #define elf_backend_write_section ppc_elf_write_section
11445 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
11446 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
11447 #define elf_backend_action_discarded ppc_elf_action_discarded
11448 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
11449 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
11450
11451 #include "elf32-target.h"
11452
11453 /* FreeBSD Target */
11454
11455 #undef TARGET_LITTLE_SYM
11456 #undef TARGET_LITTLE_NAME
11457
11458 #undef TARGET_BIG_SYM
11459 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
11460 #undef TARGET_BIG_NAME
11461 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
11462
11463 #undef ELF_OSABI
11464 #define ELF_OSABI ELFOSABI_FREEBSD
11465
11466 #undef elf32_bed
11467 #define elf32_bed elf32_powerpc_fbsd_bed
11468
11469 #include "elf32-target.h"
11470
11471 /* VxWorks Target */
11472
11473 #undef TARGET_LITTLE_SYM
11474 #undef TARGET_LITTLE_NAME
11475
11476 #undef TARGET_BIG_SYM
11477 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
11478 #undef TARGET_BIG_NAME
11479 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
11480
11481 #undef ELF_OSABI
11482
11483 /* VxWorks uses the elf default section flags for .plt. */
11484 static const struct bfd_elf_special_section *
11485 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
11486 {
11487 if (sec->name == NULL)
11488 return NULL;
11489
11490 if (strcmp (sec->name, ".plt") == 0)
11491 return _bfd_elf_get_sec_type_attr (abfd, sec);
11492
11493 return ppc_elf_get_sec_type_attr (abfd, sec);
11494 }
11495
11496 /* Like ppc_elf_link_hash_table_create, but overrides
11497 appropriately for VxWorks. */
11498 static struct bfd_link_hash_table *
11499 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11500 {
11501 struct bfd_link_hash_table *ret;
11502
11503 ret = ppc_elf_link_hash_table_create (abfd);
11504 if (ret)
11505 {
11506 struct ppc_elf_link_hash_table *htab
11507 = (struct ppc_elf_link_hash_table *)ret;
11508 htab->is_vxworks = 1;
11509 htab->plt_type = PLT_VXWORKS;
11510 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11511 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11512 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11513 }
11514 return ret;
11515 }
11516
11517 /* Tweak magic VxWorks symbols as they are loaded. */
11518 static bfd_boolean
11519 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11520 struct bfd_link_info *info,
11521 Elf_Internal_Sym *sym,
11522 const char **namep,
11523 flagword *flagsp,
11524 asection **secp,
11525 bfd_vma *valp)
11526 {
11527 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
11528 valp))
11529 return FALSE;
11530
11531 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
11532 }
11533
11534 static void
11535 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11536 {
11537 ppc_elf_final_write_processing (abfd, linker);
11538 elf_vxworks_final_write_processing (abfd, linker);
11539 }
11540
11541 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11542 define it. */
11543 #undef elf_backend_want_plt_sym
11544 #define elf_backend_want_plt_sym 1
11545 #undef elf_backend_want_got_plt
11546 #define elf_backend_want_got_plt 1
11547 #undef elf_backend_got_symbol_offset
11548 #define elf_backend_got_symbol_offset 0
11549 #undef elf_backend_plt_not_loaded
11550 #define elf_backend_plt_not_loaded 0
11551 #undef elf_backend_plt_readonly
11552 #define elf_backend_plt_readonly 1
11553 #undef elf_backend_got_header_size
11554 #define elf_backend_got_header_size 12
11555 #undef elf_backend_dtrel_excludes_plt
11556 #define elf_backend_dtrel_excludes_plt 1
11557
11558 #undef bfd_elf32_get_synthetic_symtab
11559
11560 #undef bfd_elf32_bfd_link_hash_table_create
11561 #define bfd_elf32_bfd_link_hash_table_create \
11562 ppc_elf_vxworks_link_hash_table_create
11563 #undef elf_backend_add_symbol_hook
11564 #define elf_backend_add_symbol_hook \
11565 ppc_elf_vxworks_add_symbol_hook
11566 #undef elf_backend_link_output_symbol_hook
11567 #define elf_backend_link_output_symbol_hook \
11568 elf_vxworks_link_output_symbol_hook
11569 #undef elf_backend_final_write_processing
11570 #define elf_backend_final_write_processing \
11571 ppc_elf_vxworks_final_write_processing
11572 #undef elf_backend_get_sec_type_attr
11573 #define elf_backend_get_sec_type_attr \
11574 ppc_elf_vxworks_get_sec_type_attr
11575 #undef elf_backend_emit_relocs
11576 #define elf_backend_emit_relocs \
11577 elf_vxworks_emit_relocs
11578
11579 #undef elf32_bed
11580 #define elf32_bed ppc_elf_vxworks_bed
11581 #undef elf_backend_post_process_headers
11582
11583 #include "elf32-target.h"
GDB Binutils - Deliverables
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