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