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Enhance powerpc ld -r --relax
[thirdparty/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2018 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE(htab, h) \
72 ((4*4 \
73 + (h != NULL \
74 && h == htab->tls_get_addr \
75 && !htab->params->no_tls_get_addr_opt ? 8*4 : 0) \
76 + (1u << htab->params->plt_stub_align) - 1) \
77 & -(1u << htab->params->plt_stub_align))
78
79 /* VxWorks uses its own plt layout, filled in by the static linker. */
80
81 /* The standard VxWorks PLT entry. */
82 #define VXWORKS_PLT_ENTRY_SIZE 32
83 static const bfd_vma ppc_elf_vxworks_plt_entry
84 [VXWORKS_PLT_ENTRY_SIZE / 4] =
85 {
86 0x3d800000, /* lis r12,0 */
87 0x818c0000, /* lwz r12,0(r12) */
88 0x7d8903a6, /* mtctr r12 */
89 0x4e800420, /* bctr */
90 0x39600000, /* li r11,0 */
91 0x48000000, /* b 14 <.PLT0resolve+0x4> */
92 0x60000000, /* nop */
93 0x60000000, /* nop */
94 };
95 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
96 [VXWORKS_PLT_ENTRY_SIZE / 4] =
97 {
98 0x3d9e0000, /* addis r12,r30,0 */
99 0x818c0000, /* lwz r12,0(r12) */
100 0x7d8903a6, /* mtctr r12 */
101 0x4e800420, /* bctr */
102 0x39600000, /* li r11,0 */
103 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
104 0x60000000, /* nop */
105 0x60000000, /* nop */
106 };
107
108 /* The initial VxWorks PLT entry. */
109 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
110 static const bfd_vma ppc_elf_vxworks_plt0_entry
111 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
112 {
113 0x3d800000, /* lis r12,0 */
114 0x398c0000, /* addi r12,r12,0 */
115 0x800c0008, /* lwz r0,8(r12) */
116 0x7c0903a6, /* mtctr r0 */
117 0x818c0004, /* lwz r12,4(r12) */
118 0x4e800420, /* bctr */
119 0x60000000, /* nop */
120 0x60000000, /* nop */
121 };
122 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
123 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
124 {
125 0x819e0008, /* lwz r12,8(r30) */
126 0x7d8903a6, /* mtctr r12 */
127 0x819e0004, /* lwz r12,4(r30) */
128 0x4e800420, /* bctr */
129 0x60000000, /* nop */
130 0x60000000, /* nop */
131 0x60000000, /* nop */
132 0x60000000, /* nop */
133 };
134
135 /* For executables, we have some additional relocations in
136 .rela.plt.unloaded, for the kernel loader. */
137
138 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
139 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
140 /* The number of relocations in the PLTResolve slot. */
141 #define VXWORKS_PLTRESOLVE_RELOCS 2
142 /* The number of relocations in the PLTResolve slot when creating
143 a shared library. */
144 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
145
146 /* Some instructions. */
147 #define ADDIS_11_11 0x3d6b0000
148 #define ADDIS_11_30 0x3d7e0000
149 #define ADDIS_12_12 0x3d8c0000
150 #define ADDI_11_11 0x396b0000
151 #define ADD_0_11_11 0x7c0b5a14
152 #define ADD_3_12_2 0x7c6c1214
153 #define ADD_11_0_11 0x7d605a14
154 #define B 0x48000000
155 #define BA 0x48000002
156 #define BCL_20_31 0x429f0005
157 #define BCTR 0x4e800420
158 #define BEQLR 0x4d820020
159 #define CMPWI_11_0 0x2c0b0000
160 #define LIS_11 0x3d600000
161 #define LIS_12 0x3d800000
162 #define LWZU_0_12 0x840c0000
163 #define LWZ_0_12 0x800c0000
164 #define LWZ_11_3 0x81630000
165 #define LWZ_11_11 0x816b0000
166 #define LWZ_11_30 0x817e0000
167 #define LWZ_12_3 0x81830000
168 #define LWZ_12_12 0x818c0000
169 #define MR_0_3 0x7c601b78
170 #define MR_3_0 0x7c030378
171 #define MFLR_0 0x7c0802a6
172 #define MFLR_12 0x7d8802a6
173 #define MTCTR_0 0x7c0903a6
174 #define MTCTR_11 0x7d6903a6
175 #define MTLR_0 0x7c0803a6
176 #define NOP 0x60000000
177 #define SUB_11_11_12 0x7d6c5850
178
179 /* Offset of tp and dtp pointers from start of TLS block. */
180 #define TP_OFFSET 0x7000
181 #define DTP_OFFSET 0x8000
182
183 /* The value of a defined global symbol. */
184 #define SYM_VAL(SYM) \
185 ((SYM)->root.u.def.section->output_section->vma \
186 + (SYM)->root.u.def.section->output_offset \
187 + (SYM)->root.u.def.value)
188 \f
189 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
190
191 static reloc_howto_type ppc_elf_howto_raw[] = {
192 /* This reloc does nothing. */
193 HOWTO (R_PPC_NONE, /* type */
194 0, /* rightshift */
195 3, /* size (0 = byte, 1 = short, 2 = long) */
196 0, /* bitsize */
197 FALSE, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_dont, /* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_PPC_NONE", /* name */
202 FALSE, /* partial_inplace */
203 0, /* src_mask */
204 0, /* dst_mask */
205 FALSE), /* pcrel_offset */
206
207 /* A standard 32 bit relocation. */
208 HOWTO (R_PPC_ADDR32, /* type */
209 0, /* rightshift */
210 2, /* size (0 = byte, 1 = short, 2 = long) */
211 32, /* bitsize */
212 FALSE, /* pc_relative */
213 0, /* bitpos */
214 complain_overflow_dont, /* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_PPC_ADDR32", /* name */
217 FALSE, /* partial_inplace */
218 0, /* src_mask */
219 0xffffffff, /* dst_mask */
220 FALSE), /* pcrel_offset */
221
222 /* An absolute 26 bit branch; the lower two bits must be zero.
223 FIXME: we don't check that, we just clear them. */
224 HOWTO (R_PPC_ADDR24, /* type */
225 0, /* rightshift */
226 2, /* size (0 = byte, 1 = short, 2 = long) */
227 26, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_signed, /* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR24", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0x3fffffc, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* A standard 16 bit relocation. */
239 HOWTO (R_PPC_ADDR16, /* type */
240 0, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_bitfield, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* A 16 bit relocation without overflow. */
254 HOWTO (R_PPC_ADDR16_LO, /* type */
255 0, /* rightshift */
256 1, /* size (0 = byte, 1 = short, 2 = long) */
257 16, /* bitsize */
258 FALSE, /* pc_relative */
259 0, /* bitpos */
260 complain_overflow_dont,/* complain_on_overflow */
261 bfd_elf_generic_reloc, /* special_function */
262 "R_PPC_ADDR16_LO", /* name */
263 FALSE, /* partial_inplace */
264 0, /* src_mask */
265 0xffff, /* dst_mask */
266 FALSE), /* pcrel_offset */
267
268 /* The high order 16 bits of an address. */
269 HOWTO (R_PPC_ADDR16_HI, /* type */
270 16, /* rightshift */
271 1, /* size (0 = byte, 1 = short, 2 = long) */
272 16, /* bitsize */
273 FALSE, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_dont, /* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_PPC_ADDR16_HI", /* name */
278 FALSE, /* partial_inplace */
279 0, /* src_mask */
280 0xffff, /* dst_mask */
281 FALSE), /* pcrel_offset */
282
283 /* The high order 16 bits of an address, plus 1 if the contents of
284 the low 16 bits, treated as a signed number, is negative. */
285 HOWTO (R_PPC_ADDR16_HA, /* type */
286 16, /* rightshift */
287 1, /* size (0 = byte, 1 = short, 2 = long) */
288 16, /* bitsize */
289 FALSE, /* pc_relative */
290 0, /* bitpos */
291 complain_overflow_dont, /* complain_on_overflow */
292 ppc_elf_addr16_ha_reloc, /* special_function */
293 "R_PPC_ADDR16_HA", /* name */
294 FALSE, /* partial_inplace */
295 0, /* src_mask */
296 0xffff, /* dst_mask */
297 FALSE), /* pcrel_offset */
298
299 /* An absolute 16 bit branch; the lower two bits must be zero.
300 FIXME: we don't check that, we just clear them. */
301 HOWTO (R_PPC_ADDR14, /* type */
302 0, /* rightshift */
303 2, /* size (0 = byte, 1 = short, 2 = long) */
304 16, /* bitsize */
305 FALSE, /* pc_relative */
306 0, /* bitpos */
307 complain_overflow_signed, /* complain_on_overflow */
308 bfd_elf_generic_reloc, /* special_function */
309 "R_PPC_ADDR14", /* name */
310 FALSE, /* partial_inplace */
311 0, /* src_mask */
312 0xfffc, /* dst_mask */
313 FALSE), /* pcrel_offset */
314
315 /* An absolute 16 bit branch, for which bit 10 should be set to
316 indicate that the branch is expected to be taken. The lower two
317 bits must be zero. */
318 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
319 0, /* rightshift */
320 2, /* size (0 = byte, 1 = short, 2 = long) */
321 16, /* bitsize */
322 FALSE, /* pc_relative */
323 0, /* bitpos */
324 complain_overflow_signed, /* complain_on_overflow */
325 bfd_elf_generic_reloc, /* special_function */
326 "R_PPC_ADDR14_BRTAKEN",/* name */
327 FALSE, /* partial_inplace */
328 0, /* src_mask */
329 0xfffc, /* dst_mask */
330 FALSE), /* pcrel_offset */
331
332 /* An absolute 16 bit branch, for which bit 10 should be set to
333 indicate that the branch is not expected to be taken. The lower
334 two bits must be zero. */
335 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 FALSE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_ADDR14_BRNTAKEN",/* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 FALSE), /* pcrel_offset */
348
349 /* A relative 26 bit branch; the lower two bits must be zero. */
350 HOWTO (R_PPC_REL24, /* type */
351 0, /* rightshift */
352 2, /* size (0 = byte, 1 = short, 2 = long) */
353 26, /* bitsize */
354 TRUE, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_signed, /* complain_on_overflow */
357 bfd_elf_generic_reloc, /* special_function */
358 "R_PPC_REL24", /* name */
359 FALSE, /* partial_inplace */
360 0, /* src_mask */
361 0x3fffffc, /* dst_mask */
362 TRUE), /* pcrel_offset */
363
364 /* A relative 16 bit branch; the lower two bits must be zero. */
365 HOWTO (R_PPC_REL14, /* type */
366 0, /* rightshift */
367 2, /* size (0 = byte, 1 = short, 2 = long) */
368 16, /* bitsize */
369 TRUE, /* pc_relative */
370 0, /* bitpos */
371 complain_overflow_signed, /* complain_on_overflow */
372 bfd_elf_generic_reloc, /* special_function */
373 "R_PPC_REL14", /* name */
374 FALSE, /* partial_inplace */
375 0, /* src_mask */
376 0xfffc, /* dst_mask */
377 TRUE), /* pcrel_offset */
378
379 /* A relative 16 bit branch. Bit 10 should be set to indicate that
380 the branch is expected to be taken. The lower two bits must be
381 zero. */
382 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
383 0, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 16, /* bitsize */
386 TRUE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed, /* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_PPC_REL14_BRTAKEN", /* name */
391 FALSE, /* partial_inplace */
392 0, /* src_mask */
393 0xfffc, /* dst_mask */
394 TRUE), /* pcrel_offset */
395
396 /* A relative 16 bit branch. Bit 10 should be set to indicate that
397 the branch is not expected to be taken. The lower two bits must
398 be zero. */
399 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
400 0, /* rightshift */
401 2, /* size (0 = byte, 1 = short, 2 = long) */
402 16, /* bitsize */
403 TRUE, /* pc_relative */
404 0, /* bitpos */
405 complain_overflow_signed, /* complain_on_overflow */
406 bfd_elf_generic_reloc, /* special_function */
407 "R_PPC_REL14_BRNTAKEN",/* name */
408 FALSE, /* partial_inplace */
409 0, /* src_mask */
410 0xfffc, /* dst_mask */
411 TRUE), /* pcrel_offset */
412
413 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
414 symbol. */
415 HOWTO (R_PPC_GOT16, /* type */
416 0, /* rightshift */
417 1, /* size (0 = byte, 1 = short, 2 = long) */
418 16, /* bitsize */
419 FALSE, /* pc_relative */
420 0, /* bitpos */
421 complain_overflow_signed, /* complain_on_overflow */
422 ppc_elf_unhandled_reloc, /* special_function */
423 "R_PPC_GOT16", /* name */
424 FALSE, /* partial_inplace */
425 0, /* src_mask */
426 0xffff, /* dst_mask */
427 FALSE), /* pcrel_offset */
428
429 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
430 the symbol. */
431 HOWTO (R_PPC_GOT16_LO, /* type */
432 0, /* rightshift */
433 1, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 FALSE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_dont, /* complain_on_overflow */
438 ppc_elf_unhandled_reloc, /* special_function */
439 "R_PPC_GOT16_LO", /* name */
440 FALSE, /* partial_inplace */
441 0, /* src_mask */
442 0xffff, /* dst_mask */
443 FALSE), /* pcrel_offset */
444
445 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
446 the symbol. */
447 HOWTO (R_PPC_GOT16_HI, /* type */
448 16, /* rightshift */
449 1, /* size (0 = byte, 1 = short, 2 = long) */
450 16, /* bitsize */
451 FALSE, /* pc_relative */
452 0, /* bitpos */
453 complain_overflow_dont, /* complain_on_overflow */
454 ppc_elf_unhandled_reloc, /* special_function */
455 "R_PPC_GOT16_HI", /* name */
456 FALSE, /* partial_inplace */
457 0, /* src_mask */
458 0xffff, /* dst_mask */
459 FALSE), /* pcrel_offset */
460
461 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
462 the symbol. */
463 HOWTO (R_PPC_GOT16_HA, /* type */
464 16, /* rightshift */
465 1, /* size (0 = byte, 1 = short, 2 = long) */
466 16, /* bitsize */
467 FALSE, /* pc_relative */
468 0, /* bitpos */
469 complain_overflow_dont, /* complain_on_overflow */
470 ppc_elf_unhandled_reloc, /* special_function */
471 "R_PPC_GOT16_HA", /* name */
472 FALSE, /* partial_inplace */
473 0, /* src_mask */
474 0xffff, /* dst_mask */
475 FALSE), /* pcrel_offset */
476
477 /* Like R_PPC_REL24, but referring to the procedure linkage table
478 entry for the symbol. */
479 HOWTO (R_PPC_PLTREL24, /* type */
480 0, /* rightshift */
481 2, /* size (0 = byte, 1 = short, 2 = long) */
482 26, /* bitsize */
483 TRUE, /* pc_relative */
484 0, /* bitpos */
485 complain_overflow_signed, /* complain_on_overflow */
486 ppc_elf_unhandled_reloc, /* special_function */
487 "R_PPC_PLTREL24", /* name */
488 FALSE, /* partial_inplace */
489 0, /* src_mask */
490 0x3fffffc, /* dst_mask */
491 TRUE), /* pcrel_offset */
492
493 /* This is used only by the dynamic linker. The symbol should exist
494 both in the object being run and in some shared library. The
495 dynamic linker copies the data addressed by the symbol from the
496 shared library into the object, because the object being
497 run has to have the data at some particular address. */
498 HOWTO (R_PPC_COPY, /* type */
499 0, /* rightshift */
500 2, /* size (0 = byte, 1 = short, 2 = long) */
501 32, /* bitsize */
502 FALSE, /* pc_relative */
503 0, /* bitpos */
504 complain_overflow_dont, /* complain_on_overflow */
505 ppc_elf_unhandled_reloc, /* special_function */
506 "R_PPC_COPY", /* name */
507 FALSE, /* partial_inplace */
508 0, /* src_mask */
509 0, /* dst_mask */
510 FALSE), /* pcrel_offset */
511
512 /* Like R_PPC_ADDR32, but used when setting global offset table
513 entries. */
514 HOWTO (R_PPC_GLOB_DAT, /* type */
515 0, /* rightshift */
516 2, /* size (0 = byte, 1 = short, 2 = long) */
517 32, /* bitsize */
518 FALSE, /* pc_relative */
519 0, /* bitpos */
520 complain_overflow_dont, /* complain_on_overflow */
521 ppc_elf_unhandled_reloc, /* special_function */
522 "R_PPC_GLOB_DAT", /* name */
523 FALSE, /* partial_inplace */
524 0, /* src_mask */
525 0xffffffff, /* dst_mask */
526 FALSE), /* pcrel_offset */
527
528 /* Marks a procedure linkage table entry for a symbol. */
529 HOWTO (R_PPC_JMP_SLOT, /* type */
530 0, /* rightshift */
531 2, /* size (0 = byte, 1 = short, 2 = long) */
532 32, /* bitsize */
533 FALSE, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_dont, /* complain_on_overflow */
536 ppc_elf_unhandled_reloc, /* special_function */
537 "R_PPC_JMP_SLOT", /* name */
538 FALSE, /* partial_inplace */
539 0, /* src_mask */
540 0, /* dst_mask */
541 FALSE), /* pcrel_offset */
542
543 /* Used only by the dynamic linker. When the object is run, this
544 longword is set to the load address of the object, plus the
545 addend. */
546 HOWTO (R_PPC_RELATIVE, /* type */
547 0, /* rightshift */
548 2, /* size (0 = byte, 1 = short, 2 = long) */
549 32, /* bitsize */
550 FALSE, /* pc_relative */
551 0, /* bitpos */
552 complain_overflow_dont, /* complain_on_overflow */
553 bfd_elf_generic_reloc, /* special_function */
554 "R_PPC_RELATIVE", /* name */
555 FALSE, /* partial_inplace */
556 0, /* src_mask */
557 0xffffffff, /* dst_mask */
558 FALSE), /* pcrel_offset */
559
560 /* Like R_PPC_REL24, but uses the value of the symbol within the
561 object rather than the final value. Normally used for
562 _GLOBAL_OFFSET_TABLE_. */
563 HOWTO (R_PPC_LOCAL24PC, /* type */
564 0, /* rightshift */
565 2, /* size (0 = byte, 1 = short, 2 = long) */
566 26, /* bitsize */
567 TRUE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_signed, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_LOCAL24PC", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0x3fffffc, /* dst_mask */
575 TRUE), /* pcrel_offset */
576
577 /* Like R_PPC_ADDR32, but may be unaligned. */
578 HOWTO (R_PPC_UADDR32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 FALSE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_dont, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_UADDR32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 FALSE), /* pcrel_offset */
591
592 /* Like R_PPC_ADDR16, but may be unaligned. */
593 HOWTO (R_PPC_UADDR16, /* type */
594 0, /* rightshift */
595 1, /* size (0 = byte, 1 = short, 2 = long) */
596 16, /* bitsize */
597 FALSE, /* pc_relative */
598 0, /* bitpos */
599 complain_overflow_bitfield, /* complain_on_overflow */
600 bfd_elf_generic_reloc, /* special_function */
601 "R_PPC_UADDR16", /* name */
602 FALSE, /* partial_inplace */
603 0, /* src_mask */
604 0xffff, /* dst_mask */
605 FALSE), /* pcrel_offset */
606
607 /* 32-bit PC relative */
608 HOWTO (R_PPC_REL32, /* type */
609 0, /* rightshift */
610 2, /* size (0 = byte, 1 = short, 2 = long) */
611 32, /* bitsize */
612 TRUE, /* pc_relative */
613 0, /* bitpos */
614 complain_overflow_dont, /* complain_on_overflow */
615 bfd_elf_generic_reloc, /* special_function */
616 "R_PPC_REL32", /* name */
617 FALSE, /* partial_inplace */
618 0, /* src_mask */
619 0xffffffff, /* dst_mask */
620 TRUE), /* pcrel_offset */
621
622 /* 32-bit relocation to the symbol's procedure linkage table.
623 FIXME: not supported. */
624 HOWTO (R_PPC_PLT32, /* type */
625 0, /* rightshift */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
627 32, /* bitsize */
628 FALSE, /* pc_relative */
629 0, /* bitpos */
630 complain_overflow_dont, /* complain_on_overflow */
631 ppc_elf_unhandled_reloc, /* special_function */
632 "R_PPC_PLT32", /* name */
633 FALSE, /* partial_inplace */
634 0, /* src_mask */
635 0, /* dst_mask */
636 FALSE), /* pcrel_offset */
637
638 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
639 FIXME: not supported. */
640 HOWTO (R_PPC_PLTREL32, /* type */
641 0, /* rightshift */
642 2, /* size (0 = byte, 1 = short, 2 = long) */
643 32, /* bitsize */
644 TRUE, /* pc_relative */
645 0, /* bitpos */
646 complain_overflow_dont, /* complain_on_overflow */
647 ppc_elf_unhandled_reloc, /* special_function */
648 "R_PPC_PLTREL32", /* name */
649 FALSE, /* partial_inplace */
650 0, /* src_mask */
651 0, /* dst_mask */
652 TRUE), /* pcrel_offset */
653
654 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
655 the symbol. */
656 HOWTO (R_PPC_PLT16_LO, /* type */
657 0, /* rightshift */
658 1, /* size (0 = byte, 1 = short, 2 = long) */
659 16, /* bitsize */
660 FALSE, /* pc_relative */
661 0, /* bitpos */
662 complain_overflow_dont, /* complain_on_overflow */
663 ppc_elf_unhandled_reloc, /* special_function */
664 "R_PPC_PLT16_LO", /* name */
665 FALSE, /* partial_inplace */
666 0, /* src_mask */
667 0xffff, /* dst_mask */
668 FALSE), /* pcrel_offset */
669
670 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
671 the symbol. */
672 HOWTO (R_PPC_PLT16_HI, /* type */
673 16, /* rightshift */
674 1, /* size (0 = byte, 1 = short, 2 = long) */
675 16, /* bitsize */
676 FALSE, /* pc_relative */
677 0, /* bitpos */
678 complain_overflow_dont, /* complain_on_overflow */
679 ppc_elf_unhandled_reloc, /* special_function */
680 "R_PPC_PLT16_HI", /* name */
681 FALSE, /* partial_inplace */
682 0, /* src_mask */
683 0xffff, /* dst_mask */
684 FALSE), /* pcrel_offset */
685
686 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
687 the symbol. */
688 HOWTO (R_PPC_PLT16_HA, /* type */
689 16, /* rightshift */
690 1, /* size (0 = byte, 1 = short, 2 = long) */
691 16, /* bitsize */
692 FALSE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_dont, /* complain_on_overflow */
695 ppc_elf_unhandled_reloc, /* special_function */
696 "R_PPC_PLT16_HA", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0xffff, /* dst_mask */
700 FALSE), /* pcrel_offset */
701
702 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
703 small data items. */
704 HOWTO (R_PPC_SDAREL16, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_signed, /* complain_on_overflow */
711 ppc_elf_unhandled_reloc, /* special_function */
712 "R_PPC_SDAREL16", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit section relative relocation. */
719 HOWTO (R_PPC_SECTOFF, /* type */
720 0, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_signed, /* complain_on_overflow */
726 ppc_elf_unhandled_reloc, /* special_function */
727 "R_PPC_SECTOFF", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit lower half section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_LO, /* type */
735 0, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_dont, /* complain_on_overflow */
741 ppc_elf_unhandled_reloc, /* special_function */
742 "R_PPC_SECTOFF_LO", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* 16-bit upper half section relative relocation. */
749 HOWTO (R_PPC_SECTOFF_HI, /* type */
750 16, /* rightshift */
751 1, /* size (0 = byte, 1 = short, 2 = long) */
752 16, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 ppc_elf_unhandled_reloc, /* special_function */
757 "R_PPC_SECTOFF_HI", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0xffff, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* 16-bit upper half adjusted section relative relocation. */
764 HOWTO (R_PPC_SECTOFF_HA, /* type */
765 16, /* rightshift */
766 1, /* size (0 = byte, 1 = short, 2 = long) */
767 16, /* bitsize */
768 FALSE, /* pc_relative */
769 0, /* bitpos */
770 complain_overflow_dont, /* complain_on_overflow */
771 ppc_elf_unhandled_reloc, /* special_function */
772 "R_PPC_SECTOFF_HA", /* name */
773 FALSE, /* partial_inplace */
774 0, /* src_mask */
775 0xffff, /* dst_mask */
776 FALSE), /* pcrel_offset */
777
778 /* Marker relocs for TLS. */
779 HOWTO (R_PPC_TLS,
780 0, /* rightshift */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
782 32, /* bitsize */
783 FALSE, /* pc_relative */
784 0, /* bitpos */
785 complain_overflow_dont, /* complain_on_overflow */
786 bfd_elf_generic_reloc, /* special_function */
787 "R_PPC_TLS", /* name */
788 FALSE, /* partial_inplace */
789 0, /* src_mask */
790 0, /* dst_mask */
791 FALSE), /* pcrel_offset */
792
793 HOWTO (R_PPC_TLSGD,
794 0, /* rightshift */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
796 32, /* bitsize */
797 FALSE, /* pc_relative */
798 0, /* bitpos */
799 complain_overflow_dont, /* complain_on_overflow */
800 bfd_elf_generic_reloc, /* special_function */
801 "R_PPC_TLSGD", /* name */
802 FALSE, /* partial_inplace */
803 0, /* src_mask */
804 0, /* dst_mask */
805 FALSE), /* pcrel_offset */
806
807 HOWTO (R_PPC_TLSLD,
808 0, /* rightshift */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
810 32, /* bitsize */
811 FALSE, /* pc_relative */
812 0, /* bitpos */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 "R_PPC_TLSLD", /* name */
816 FALSE, /* partial_inplace */
817 0, /* src_mask */
818 0, /* dst_mask */
819 FALSE), /* pcrel_offset */
820
821 /* Marker relocs on inline plt call instructions. */
822 HOWTO (R_PPC_PLTSEQ,
823 0, /* rightshift */
824 2, /* size (0 = byte, 1 = short, 2 = long) */
825 32, /* bitsize */
826 FALSE, /* pc_relative */
827 0, /* bitpos */
828 complain_overflow_dont, /* complain_on_overflow */
829 bfd_elf_generic_reloc, /* special_function */
830 "R_PPC_PLTSEQ", /* name */
831 FALSE, /* partial_inplace */
832 0, /* src_mask */
833 0, /* dst_mask */
834 FALSE), /* pcrel_offset */
835
836 HOWTO (R_PPC_PLTCALL,
837 0, /* rightshift */
838 2, /* size (0 = byte, 1 = short, 2 = long) */
839 32, /* bitsize */
840 FALSE, /* pc_relative */
841 0, /* bitpos */
842 complain_overflow_dont, /* complain_on_overflow */
843 bfd_elf_generic_reloc, /* special_function */
844 "R_PPC_PLTCALL", /* name */
845 FALSE, /* partial_inplace */
846 0, /* src_mask */
847 0, /* dst_mask */
848 FALSE), /* pcrel_offset */
849
850 /* Computes the load module index of the load module that contains the
851 definition of its TLS sym. */
852 HOWTO (R_PPC_DTPMOD32,
853 0, /* rightshift */
854 2, /* size (0 = byte, 1 = short, 2 = long) */
855 32, /* bitsize */
856 FALSE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_dont, /* complain_on_overflow */
859 ppc_elf_unhandled_reloc, /* special_function */
860 "R_PPC_DTPMOD32", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 0xffffffff, /* dst_mask */
864 FALSE), /* pcrel_offset */
865
866 /* Computes a dtv-relative displacement, the difference between the value
867 of sym+add and the base address of the thread-local storage block that
868 contains the definition of sym, minus 0x8000. */
869 HOWTO (R_PPC_DTPREL32,
870 0, /* rightshift */
871 2, /* size (0 = byte, 1 = short, 2 = long) */
872 32, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 ppc_elf_unhandled_reloc, /* special_function */
877 "R_PPC_DTPREL32", /* name */
878 FALSE, /* partial_inplace */
879 0, /* src_mask */
880 0xffffffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* A 16 bit dtprel reloc. */
884 HOWTO (R_PPC_DTPREL16,
885 0, /* rightshift */
886 1, /* size (0 = byte, 1 = short, 2 = long) */
887 16, /* bitsize */
888 FALSE, /* pc_relative */
889 0, /* bitpos */
890 complain_overflow_signed, /* complain_on_overflow */
891 ppc_elf_unhandled_reloc, /* special_function */
892 "R_PPC_DTPREL16", /* name */
893 FALSE, /* partial_inplace */
894 0, /* src_mask */
895 0xffff, /* dst_mask */
896 FALSE), /* pcrel_offset */
897
898 /* Like DTPREL16, but no overflow. */
899 HOWTO (R_PPC_DTPREL16_LO,
900 0, /* rightshift */
901 1, /* size (0 = byte, 1 = short, 2 = long) */
902 16, /* bitsize */
903 FALSE, /* pc_relative */
904 0, /* bitpos */
905 complain_overflow_dont, /* complain_on_overflow */
906 ppc_elf_unhandled_reloc, /* special_function */
907 "R_PPC_DTPREL16_LO", /* name */
908 FALSE, /* partial_inplace */
909 0, /* src_mask */
910 0xffff, /* dst_mask */
911 FALSE), /* pcrel_offset */
912
913 /* Like DTPREL16_LO, but next higher group of 16 bits. */
914 HOWTO (R_PPC_DTPREL16_HI,
915 16, /* rightshift */
916 1, /* size (0 = byte, 1 = short, 2 = long) */
917 16, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_dont, /* complain_on_overflow */
921 ppc_elf_unhandled_reloc, /* special_function */
922 "R_PPC_DTPREL16_HI", /* name */
923 FALSE, /* partial_inplace */
924 0, /* src_mask */
925 0xffff, /* dst_mask */
926 FALSE), /* pcrel_offset */
927
928 /* Like DTPREL16_HI, but adjust for low 16 bits. */
929 HOWTO (R_PPC_DTPREL16_HA,
930 16, /* rightshift */
931 1, /* size (0 = byte, 1 = short, 2 = long) */
932 16, /* bitsize */
933 FALSE, /* pc_relative */
934 0, /* bitpos */
935 complain_overflow_dont, /* complain_on_overflow */
936 ppc_elf_unhandled_reloc, /* special_function */
937 "R_PPC_DTPREL16_HA", /* name */
938 FALSE, /* partial_inplace */
939 0, /* src_mask */
940 0xffff, /* dst_mask */
941 FALSE), /* pcrel_offset */
942
943 /* Computes a tp-relative displacement, the difference between the value of
944 sym+add and the value of the thread pointer (r13). */
945 HOWTO (R_PPC_TPREL32,
946 0, /* rightshift */
947 2, /* size (0 = byte, 1 = short, 2 = long) */
948 32, /* bitsize */
949 FALSE, /* pc_relative */
950 0, /* bitpos */
951 complain_overflow_dont, /* complain_on_overflow */
952 ppc_elf_unhandled_reloc, /* special_function */
953 "R_PPC_TPREL32", /* name */
954 FALSE, /* partial_inplace */
955 0, /* src_mask */
956 0xffffffff, /* dst_mask */
957 FALSE), /* pcrel_offset */
958
959 /* A 16 bit tprel reloc. */
960 HOWTO (R_PPC_TPREL16,
961 0, /* rightshift */
962 1, /* size (0 = byte, 1 = short, 2 = long) */
963 16, /* bitsize */
964 FALSE, /* pc_relative */
965 0, /* bitpos */
966 complain_overflow_signed, /* complain_on_overflow */
967 ppc_elf_unhandled_reloc, /* special_function */
968 "R_PPC_TPREL16", /* name */
969 FALSE, /* partial_inplace */
970 0, /* src_mask */
971 0xffff, /* dst_mask */
972 FALSE), /* pcrel_offset */
973
974 /* Like TPREL16, but no overflow. */
975 HOWTO (R_PPC_TPREL16_LO,
976 0, /* rightshift */
977 1, /* size (0 = byte, 1 = short, 2 = long) */
978 16, /* bitsize */
979 FALSE, /* pc_relative */
980 0, /* bitpos */
981 complain_overflow_dont, /* complain_on_overflow */
982 ppc_elf_unhandled_reloc, /* special_function */
983 "R_PPC_TPREL16_LO", /* name */
984 FALSE, /* partial_inplace */
985 0, /* src_mask */
986 0xffff, /* dst_mask */
987 FALSE), /* pcrel_offset */
988
989 /* Like TPREL16_LO, but next higher group of 16 bits. */
990 HOWTO (R_PPC_TPREL16_HI,
991 16, /* rightshift */
992 1, /* size (0 = byte, 1 = short, 2 = long) */
993 16, /* bitsize */
994 FALSE, /* pc_relative */
995 0, /* bitpos */
996 complain_overflow_dont, /* complain_on_overflow */
997 ppc_elf_unhandled_reloc, /* special_function */
998 "R_PPC_TPREL16_HI", /* name */
999 FALSE, /* partial_inplace */
1000 0, /* src_mask */
1001 0xffff, /* dst_mask */
1002 FALSE), /* pcrel_offset */
1003
1004 /* Like TPREL16_HI, but adjust for low 16 bits. */
1005 HOWTO (R_PPC_TPREL16_HA,
1006 16, /* rightshift */
1007 1, /* size (0 = byte, 1 = short, 2 = long) */
1008 16, /* bitsize */
1009 FALSE, /* pc_relative */
1010 0, /* bitpos */
1011 complain_overflow_dont, /* complain_on_overflow */
1012 ppc_elf_unhandled_reloc, /* special_function */
1013 "R_PPC_TPREL16_HA", /* name */
1014 FALSE, /* partial_inplace */
1015 0, /* src_mask */
1016 0xffff, /* dst_mask */
1017 FALSE), /* pcrel_offset */
1018
1019 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1020 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
1021 to the first entry. */
1022 HOWTO (R_PPC_GOT_TLSGD16,
1023 0, /* rightshift */
1024 1, /* size (0 = byte, 1 = short, 2 = long) */
1025 16, /* bitsize */
1026 FALSE, /* pc_relative */
1027 0, /* bitpos */
1028 complain_overflow_signed, /* complain_on_overflow */
1029 ppc_elf_unhandled_reloc, /* special_function */
1030 "R_PPC_GOT_TLSGD16", /* name */
1031 FALSE, /* partial_inplace */
1032 0, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1035
1036 /* Like GOT_TLSGD16, but no overflow. */
1037 HOWTO (R_PPC_GOT_TLSGD16_LO,
1038 0, /* rightshift */
1039 1, /* size (0 = byte, 1 = short, 2 = long) */
1040 16, /* bitsize */
1041 FALSE, /* pc_relative */
1042 0, /* bitpos */
1043 complain_overflow_dont, /* complain_on_overflow */
1044 ppc_elf_unhandled_reloc, /* special_function */
1045 "R_PPC_GOT_TLSGD16_LO", /* name */
1046 FALSE, /* partial_inplace */
1047 0, /* src_mask */
1048 0xffff, /* dst_mask */
1049 FALSE), /* pcrel_offset */
1050
1051 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1052 HOWTO (R_PPC_GOT_TLSGD16_HI,
1053 16, /* rightshift */
1054 1, /* size (0 = byte, 1 = short, 2 = long) */
1055 16, /* bitsize */
1056 FALSE, /* pc_relative */
1057 0, /* bitpos */
1058 complain_overflow_dont, /* complain_on_overflow */
1059 ppc_elf_unhandled_reloc, /* special_function */
1060 "R_PPC_GOT_TLSGD16_HI", /* name */
1061 FALSE, /* partial_inplace */
1062 0, /* src_mask */
1063 0xffff, /* dst_mask */
1064 FALSE), /* pcrel_offset */
1065
1066 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1067 HOWTO (R_PPC_GOT_TLSGD16_HA,
1068 16, /* rightshift */
1069 1, /* size (0 = byte, 1 = short, 2 = long) */
1070 16, /* bitsize */
1071 FALSE, /* pc_relative */
1072 0, /* bitpos */
1073 complain_overflow_dont, /* complain_on_overflow */
1074 ppc_elf_unhandled_reloc, /* special_function */
1075 "R_PPC_GOT_TLSGD16_HA", /* name */
1076 FALSE, /* partial_inplace */
1077 0, /* src_mask */
1078 0xffff, /* dst_mask */
1079 FALSE), /* pcrel_offset */
1080
1081 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1082 with values (sym+add)@dtpmod and zero, and computes the offset to the
1083 first entry. */
1084 HOWTO (R_PPC_GOT_TLSLD16,
1085 0, /* rightshift */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1087 16, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_signed, /* complain_on_overflow */
1091 ppc_elf_unhandled_reloc, /* special_function */
1092 "R_PPC_GOT_TLSLD16", /* name */
1093 FALSE, /* partial_inplace */
1094 0, /* src_mask */
1095 0xffff, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 /* Like GOT_TLSLD16, but no overflow. */
1099 HOWTO (R_PPC_GOT_TLSLD16_LO,
1100 0, /* rightshift */
1101 1, /* size (0 = byte, 1 = short, 2 = long) */
1102 16, /* bitsize */
1103 FALSE, /* pc_relative */
1104 0, /* bitpos */
1105 complain_overflow_dont, /* complain_on_overflow */
1106 ppc_elf_unhandled_reloc, /* special_function */
1107 "R_PPC_GOT_TLSLD16_LO", /* name */
1108 FALSE, /* partial_inplace */
1109 0, /* src_mask */
1110 0xffff, /* dst_mask */
1111 FALSE), /* pcrel_offset */
1112
1113 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1114 HOWTO (R_PPC_GOT_TLSLD16_HI,
1115 16, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_dont, /* complain_on_overflow */
1121 ppc_elf_unhandled_reloc, /* special_function */
1122 "R_PPC_GOT_TLSLD16_HI", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xffff, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1129 HOWTO (R_PPC_GOT_TLSLD16_HA,
1130 16, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc_elf_unhandled_reloc, /* special_function */
1137 "R_PPC_GOT_TLSLD16_HA", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xffff, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1144 the offset to the entry. */
1145 HOWTO (R_PPC_GOT_DTPREL16,
1146 0, /* rightshift */
1147 1, /* size (0 = byte, 1 = short, 2 = long) */
1148 16, /* bitsize */
1149 FALSE, /* pc_relative */
1150 0, /* bitpos */
1151 complain_overflow_signed, /* complain_on_overflow */
1152 ppc_elf_unhandled_reloc, /* special_function */
1153 "R_PPC_GOT_DTPREL16", /* name */
1154 FALSE, /* partial_inplace */
1155 0, /* src_mask */
1156 0xffff, /* dst_mask */
1157 FALSE), /* pcrel_offset */
1158
1159 /* Like GOT_DTPREL16, but no overflow. */
1160 HOWTO (R_PPC_GOT_DTPREL16_LO,
1161 0, /* rightshift */
1162 1, /* size (0 = byte, 1 = short, 2 = long) */
1163 16, /* bitsize */
1164 FALSE, /* pc_relative */
1165 0, /* bitpos */
1166 complain_overflow_dont, /* complain_on_overflow */
1167 ppc_elf_unhandled_reloc, /* special_function */
1168 "R_PPC_GOT_DTPREL16_LO", /* name */
1169 FALSE, /* partial_inplace */
1170 0, /* src_mask */
1171 0xffff, /* dst_mask */
1172 FALSE), /* pcrel_offset */
1173
1174 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1175 HOWTO (R_PPC_GOT_DTPREL16_HI,
1176 16, /* rightshift */
1177 1, /* size (0 = byte, 1 = short, 2 = long) */
1178 16, /* bitsize */
1179 FALSE, /* pc_relative */
1180 0, /* bitpos */
1181 complain_overflow_dont, /* complain_on_overflow */
1182 ppc_elf_unhandled_reloc, /* special_function */
1183 "R_PPC_GOT_DTPREL16_HI", /* name */
1184 FALSE, /* partial_inplace */
1185 0, /* src_mask */
1186 0xffff, /* dst_mask */
1187 FALSE), /* pcrel_offset */
1188
1189 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1190 HOWTO (R_PPC_GOT_DTPREL16_HA,
1191 16, /* rightshift */
1192 1, /* size (0 = byte, 1 = short, 2 = long) */
1193 16, /* bitsize */
1194 FALSE, /* pc_relative */
1195 0, /* bitpos */
1196 complain_overflow_dont, /* complain_on_overflow */
1197 ppc_elf_unhandled_reloc, /* special_function */
1198 "R_PPC_GOT_DTPREL16_HA", /* name */
1199 FALSE, /* partial_inplace */
1200 0, /* src_mask */
1201 0xffff, /* dst_mask */
1202 FALSE), /* pcrel_offset */
1203
1204 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1205 offset to the entry. */
1206 HOWTO (R_PPC_GOT_TPREL16,
1207 0, /* rightshift */
1208 1, /* size (0 = byte, 1 = short, 2 = long) */
1209 16, /* bitsize */
1210 FALSE, /* pc_relative */
1211 0, /* bitpos */
1212 complain_overflow_signed, /* complain_on_overflow */
1213 ppc_elf_unhandled_reloc, /* special_function */
1214 "R_PPC_GOT_TPREL16", /* name */
1215 FALSE, /* partial_inplace */
1216 0, /* src_mask */
1217 0xffff, /* dst_mask */
1218 FALSE), /* pcrel_offset */
1219
1220 /* Like GOT_TPREL16, but no overflow. */
1221 HOWTO (R_PPC_GOT_TPREL16_LO,
1222 0, /* rightshift */
1223 1, /* size (0 = byte, 1 = short, 2 = long) */
1224 16, /* bitsize */
1225 FALSE, /* pc_relative */
1226 0, /* bitpos */
1227 complain_overflow_dont, /* complain_on_overflow */
1228 ppc_elf_unhandled_reloc, /* special_function */
1229 "R_PPC_GOT_TPREL16_LO", /* name */
1230 FALSE, /* partial_inplace */
1231 0, /* src_mask */
1232 0xffff, /* dst_mask */
1233 FALSE), /* pcrel_offset */
1234
1235 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1236 HOWTO (R_PPC_GOT_TPREL16_HI,
1237 16, /* rightshift */
1238 1, /* size (0 = byte, 1 = short, 2 = long) */
1239 16, /* bitsize */
1240 FALSE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_dont, /* complain_on_overflow */
1243 ppc_elf_unhandled_reloc, /* special_function */
1244 "R_PPC_GOT_TPREL16_HI", /* name */
1245 FALSE, /* partial_inplace */
1246 0, /* src_mask */
1247 0xffff, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1249
1250 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1251 HOWTO (R_PPC_GOT_TPREL16_HA,
1252 16, /* rightshift */
1253 1, /* size (0 = byte, 1 = short, 2 = long) */
1254 16, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 ppc_elf_unhandled_reloc, /* special_function */
1259 "R_PPC_GOT_TPREL16_HA", /* name */
1260 FALSE, /* partial_inplace */
1261 0, /* src_mask */
1262 0xffff, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264
1265 /* The remaining relocs are from the Embedded ELF ABI, and are not
1266 in the SVR4 ELF ABI. */
1267
1268 /* 32 bit value resulting from the addend minus the symbol. */
1269 HOWTO (R_PPC_EMB_NADDR32, /* type */
1270 0, /* rightshift */
1271 2, /* size (0 = byte, 1 = short, 2 = long) */
1272 32, /* bitsize */
1273 FALSE, /* pc_relative */
1274 0, /* bitpos */
1275 complain_overflow_dont, /* complain_on_overflow */
1276 ppc_elf_unhandled_reloc, /* special_function */
1277 "R_PPC_EMB_NADDR32", /* name */
1278 FALSE, /* partial_inplace */
1279 0, /* src_mask */
1280 0xffffffff, /* dst_mask */
1281 FALSE), /* pcrel_offset */
1282
1283 /* 16 bit value resulting from the addend minus the symbol. */
1284 HOWTO (R_PPC_EMB_NADDR16, /* type */
1285 0, /* rightshift */
1286 1, /* size (0 = byte, 1 = short, 2 = long) */
1287 16, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_signed, /* complain_on_overflow */
1291 ppc_elf_unhandled_reloc, /* special_function */
1292 "R_PPC_EMB_NADDR16", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 0xffff, /* dst_mask */
1296 FALSE), /* pcrel_offset */
1297
1298 /* 16 bit value resulting from the addend minus the symbol. */
1299 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1300 0, /* rightshift */
1301 1, /* size (0 = byte, 1 = short, 2 = long) */
1302 16, /* bitsize */
1303 FALSE, /* pc_relative */
1304 0, /* bitpos */
1305 complain_overflow_dont,/* complain_on_overflow */
1306 ppc_elf_unhandled_reloc, /* special_function */
1307 "R_PPC_EMB_ADDR16_LO", /* name */
1308 FALSE, /* partial_inplace */
1309 0, /* src_mask */
1310 0xffff, /* dst_mask */
1311 FALSE), /* pcrel_offset */
1312
1313 /* The high order 16 bits of the addend minus the symbol. */
1314 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1315 16, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_dont, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_NADDR16_HI", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* The high order 16 bits of the result of the addend minus the address,
1329 plus 1 if the contents of the low 16 bits, treated as a signed number,
1330 is negative. */
1331 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1332 16, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_NADDR16_HA", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* 16 bit value resulting from allocating a 4 byte word to hold an
1346 address in the .sdata section, and returning the offset from
1347 _SDA_BASE_ for that relocation. */
1348 HOWTO (R_PPC_EMB_SDAI16, /* type */
1349 0, /* rightshift */
1350 1, /* size (0 = byte, 1 = short, 2 = long) */
1351 16, /* bitsize */
1352 FALSE, /* pc_relative */
1353 0, /* bitpos */
1354 complain_overflow_signed, /* complain_on_overflow */
1355 ppc_elf_unhandled_reloc, /* special_function */
1356 "R_PPC_EMB_SDAI16", /* name */
1357 FALSE, /* partial_inplace */
1358 0, /* src_mask */
1359 0xffff, /* dst_mask */
1360 FALSE), /* pcrel_offset */
1361
1362 /* 16 bit value resulting from allocating a 4 byte word to hold an
1363 address in the .sdata2 section, and returning the offset from
1364 _SDA2_BASE_ for that relocation. */
1365 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 FALSE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_signed, /* complain_on_overflow */
1372 ppc_elf_unhandled_reloc, /* special_function */
1373 "R_PPC_EMB_SDA2I16", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 FALSE), /* pcrel_offset */
1378
1379 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1380 small data items. */
1381 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1382 0, /* rightshift */
1383 1, /* size (0 = byte, 1 = short, 2 = long) */
1384 16, /* bitsize */
1385 FALSE, /* pc_relative */
1386 0, /* bitpos */
1387 complain_overflow_signed, /* complain_on_overflow */
1388 ppc_elf_unhandled_reloc, /* special_function */
1389 "R_PPC_EMB_SDA2REL", /* name */
1390 FALSE, /* partial_inplace */
1391 0, /* src_mask */
1392 0xffff, /* dst_mask */
1393 FALSE), /* pcrel_offset */
1394
1395 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1396 signed offset from the appropriate base, and filling in the register
1397 field with the appropriate register (0, 2, or 13). */
1398 HOWTO (R_PPC_EMB_SDA21, /* type */
1399 0, /* rightshift */
1400 2, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 FALSE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_signed, /* complain_on_overflow */
1405 ppc_elf_unhandled_reloc, /* special_function */
1406 "R_PPC_EMB_SDA21", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 FALSE), /* pcrel_offset */
1411
1412 /* Relocation not handled: R_PPC_EMB_MRKREF */
1413 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1414 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1415 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1416 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1417 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1418
1419 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1420 in the 16 bit signed offset from the appropriate base, and filling in the
1421 register field with the appropriate register (0, 2, or 13). */
1422 HOWTO (R_PPC_EMB_RELSDA, /* type */
1423 0, /* rightshift */
1424 1, /* size (0 = byte, 1 = short, 2 = long) */
1425 16, /* bitsize */
1426 FALSE, /* pc_relative */
1427 0, /* bitpos */
1428 complain_overflow_signed, /* complain_on_overflow */
1429 ppc_elf_unhandled_reloc, /* special_function */
1430 "R_PPC_EMB_RELSDA", /* name */
1431 FALSE, /* partial_inplace */
1432 0, /* src_mask */
1433 0xffff, /* dst_mask */
1434 FALSE), /* pcrel_offset */
1435
1436 /* A relative 8 bit branch. */
1437 HOWTO (R_PPC_VLE_REL8, /* type */
1438 1, /* rightshift */
1439 1, /* size (0 = byte, 1 = short, 2 = long) */
1440 8, /* bitsize */
1441 TRUE, /* pc_relative */
1442 0, /* bitpos */
1443 complain_overflow_signed, /* complain_on_overflow */
1444 bfd_elf_generic_reloc, /* special_function */
1445 "R_PPC_VLE_REL8", /* name */
1446 FALSE, /* partial_inplace */
1447 0, /* src_mask */
1448 0xff, /* dst_mask */
1449 TRUE), /* pcrel_offset */
1450
1451 /* A relative 15 bit branch. */
1452 HOWTO (R_PPC_VLE_REL15, /* type */
1453 1, /* rightshift */
1454 2, /* size (0 = byte, 1 = short, 2 = long) */
1455 15, /* bitsize */
1456 TRUE, /* pc_relative */
1457 1, /* bitpos */
1458 complain_overflow_signed, /* complain_on_overflow */
1459 bfd_elf_generic_reloc, /* special_function */
1460 "R_PPC_VLE_REL15", /* name */
1461 FALSE, /* partial_inplace */
1462 0, /* src_mask */
1463 0xfffe, /* dst_mask */
1464 TRUE), /* pcrel_offset */
1465
1466 /* A relative 24 bit branch. */
1467 HOWTO (R_PPC_VLE_REL24, /* type */
1468 1, /* rightshift */
1469 2, /* size (0 = byte, 1 = short, 2 = long) */
1470 24, /* bitsize */
1471 TRUE, /* pc_relative */
1472 1, /* bitpos */
1473 complain_overflow_signed, /* complain_on_overflow */
1474 bfd_elf_generic_reloc, /* special_function */
1475 "R_PPC_VLE_REL24", /* name */
1476 FALSE, /* partial_inplace */
1477 0, /* src_mask */
1478 0x1fffffe, /* dst_mask */
1479 TRUE), /* pcrel_offset */
1480
1481 /* The 16 LSBS in split16a format. */
1482 HOWTO (R_PPC_VLE_LO16A, /* type */
1483 0, /* rightshift */
1484 2, /* size (0 = byte, 1 = short, 2 = long) */
1485 16, /* bitsize */
1486 FALSE, /* pc_relative */
1487 0, /* bitpos */
1488 complain_overflow_dont, /* complain_on_overflow */
1489 ppc_elf_unhandled_reloc, /* special_function */
1490 "R_PPC_VLE_LO16A", /* name */
1491 FALSE, /* partial_inplace */
1492 0, /* src_mask */
1493 0x1f07ff, /* dst_mask */
1494 FALSE), /* pcrel_offset */
1495
1496 /* The 16 LSBS in split16d format. */
1497 HOWTO (R_PPC_VLE_LO16D, /* type */
1498 0, /* rightshift */
1499 2, /* size (0 = byte, 1 = short, 2 = long) */
1500 16, /* bitsize */
1501 FALSE, /* pc_relative */
1502 0, /* bitpos */
1503 complain_overflow_dont, /* complain_on_overflow */
1504 ppc_elf_unhandled_reloc, /* special_function */
1505 "R_PPC_VLE_LO16D", /* name */
1506 FALSE, /* partial_inplace */
1507 0, /* src_mask */
1508 0x3e007ff, /* dst_mask */
1509 FALSE), /* pcrel_offset */
1510
1511 /* Bits 16-31 split16a format. */
1512 HOWTO (R_PPC_VLE_HI16A, /* type */
1513 16, /* rightshift */
1514 2, /* size (0 = byte, 1 = short, 2 = long) */
1515 16, /* bitsize */
1516 FALSE, /* pc_relative */
1517 0, /* bitpos */
1518 complain_overflow_dont, /* complain_on_overflow */
1519 ppc_elf_unhandled_reloc, /* special_function */
1520 "R_PPC_VLE_HI16A", /* name */
1521 FALSE, /* partial_inplace */
1522 0, /* src_mask */
1523 0x1f07ff, /* dst_mask */
1524 FALSE), /* pcrel_offset */
1525
1526 /* Bits 16-31 split16d format. */
1527 HOWTO (R_PPC_VLE_HI16D, /* type */
1528 16, /* rightshift */
1529 2, /* size (0 = byte, 1 = short, 2 = long) */
1530 16, /* bitsize */
1531 FALSE, /* pc_relative */
1532 0, /* bitpos */
1533 complain_overflow_dont, /* complain_on_overflow */
1534 ppc_elf_unhandled_reloc, /* special_function */
1535 "R_PPC_VLE_HI16D", /* name */
1536 FALSE, /* partial_inplace */
1537 0, /* src_mask */
1538 0x3e007ff, /* dst_mask */
1539 FALSE), /* pcrel_offset */
1540
1541 /* Bits 16-31 (High Adjusted) in split16a format. */
1542 HOWTO (R_PPC_VLE_HA16A, /* type */
1543 16, /* rightshift */
1544 2, /* size (0 = byte, 1 = short, 2 = long) */
1545 16, /* bitsize */
1546 FALSE, /* pc_relative */
1547 0, /* bitpos */
1548 complain_overflow_dont, /* complain_on_overflow */
1549 ppc_elf_unhandled_reloc, /* special_function */
1550 "R_PPC_VLE_HA16A", /* name */
1551 FALSE, /* partial_inplace */
1552 0, /* src_mask */
1553 0x1f07ff, /* dst_mask */
1554 FALSE), /* pcrel_offset */
1555
1556 /* Bits 16-31 (High Adjusted) in split16d format. */
1557 HOWTO (R_PPC_VLE_HA16D, /* type */
1558 16, /* rightshift */
1559 2, /* size (0 = byte, 1 = short, 2 = long) */
1560 16, /* bitsize */
1561 FALSE, /* pc_relative */
1562 0, /* bitpos */
1563 complain_overflow_dont, /* complain_on_overflow */
1564 ppc_elf_unhandled_reloc, /* special_function */
1565 "R_PPC_VLE_HA16D", /* name */
1566 FALSE, /* partial_inplace */
1567 0, /* src_mask */
1568 0x3e007ff, /* dst_mask */
1569 FALSE), /* pcrel_offset */
1570
1571 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1572 instructions. If the register base is 0 then the linker changes
1573 the e_add16i to an e_li instruction. */
1574 HOWTO (R_PPC_VLE_SDA21, /* type */
1575 0, /* rightshift */
1576 2, /* size (0 = byte, 1 = short, 2 = long) */
1577 16, /* bitsize */
1578 FALSE, /* pc_relative */
1579 0, /* bitpos */
1580 complain_overflow_signed, /* complain_on_overflow */
1581 ppc_elf_unhandled_reloc, /* special_function */
1582 "R_PPC_VLE_SDA21", /* name */
1583 FALSE, /* partial_inplace */
1584 0, /* src_mask */
1585 0xffff, /* dst_mask */
1586 FALSE), /* pcrel_offset */
1587
1588 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1589 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1590 0, /* rightshift */
1591 2, /* size (0 = byte, 1 = short, 2 = long) */
1592 16, /* bitsize */
1593 FALSE, /* pc_relative */
1594 0, /* bitpos */
1595 complain_overflow_dont, /* complain_on_overflow */
1596 ppc_elf_unhandled_reloc, /* special_function */
1597 "R_PPC_VLE_SDA21_LO", /* name */
1598 FALSE, /* partial_inplace */
1599 0, /* src_mask */
1600 0xffff, /* dst_mask */
1601 FALSE), /* pcrel_offset */
1602
1603 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1604 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1605 0, /* rightshift */
1606 2, /* size (0 = byte, 1 = short, 2 = long) */
1607 16, /* bitsize */
1608 FALSE, /* pc_relative */
1609 0, /* bitpos */
1610 complain_overflow_dont, /* complain_on_overflow */
1611 ppc_elf_unhandled_reloc, /* special_function */
1612 "R_PPC_VLE_SDAREL_LO16A", /* name */
1613 FALSE, /* partial_inplace */
1614 0, /* src_mask */
1615 0x1f07ff, /* dst_mask */
1616 FALSE), /* pcrel_offset */
1617
1618 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1619 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1620 0, /* rightshift */
1621 2, /* size (0 = byte, 1 = short, 2 = long) */
1622 16, /* bitsize */
1623 FALSE, /* pc_relative */
1624 0, /* bitpos */
1625 complain_overflow_dont, /* complain_on_overflow */
1626 ppc_elf_unhandled_reloc, /* special_function */
1627 "R_PPC_VLE_SDAREL_LO16D", /* name */
1628 FALSE, /* partial_inplace */
1629 0, /* src_mask */
1630 0x3e007ff, /* dst_mask */
1631 FALSE), /* pcrel_offset */
1632
1633 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1634 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1635 16, /* rightshift */
1636 2, /* size (0 = byte, 1 = short, 2 = long) */
1637 16, /* bitsize */
1638 FALSE, /* pc_relative */
1639 0, /* bitpos */
1640 complain_overflow_dont, /* complain_on_overflow */
1641 ppc_elf_unhandled_reloc, /* special_function */
1642 "R_PPC_VLE_SDAREL_HI16A", /* name */
1643 FALSE, /* partial_inplace */
1644 0, /* src_mask */
1645 0x1f07ff, /* dst_mask */
1646 FALSE), /* pcrel_offset */
1647
1648 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1649 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1650 16, /* rightshift */
1651 2, /* size (0 = byte, 1 = short, 2 = long) */
1652 16, /* bitsize */
1653 FALSE, /* pc_relative */
1654 0, /* bitpos */
1655 complain_overflow_dont, /* complain_on_overflow */
1656 ppc_elf_unhandled_reloc, /* special_function */
1657 "R_PPC_VLE_SDAREL_HI16D", /* name */
1658 FALSE, /* partial_inplace */
1659 0, /* src_mask */
1660 0x3e007ff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1662
1663 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1664 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1665 16, /* rightshift */
1666 2, /* size (0 = byte, 1 = short, 2 = long) */
1667 16, /* bitsize */
1668 FALSE, /* pc_relative */
1669 0, /* bitpos */
1670 complain_overflow_dont, /* complain_on_overflow */
1671 ppc_elf_unhandled_reloc, /* special_function */
1672 "R_PPC_VLE_SDAREL_HA16A", /* name */
1673 FALSE, /* partial_inplace */
1674 0, /* src_mask */
1675 0x1f07ff, /* dst_mask */
1676 FALSE), /* pcrel_offset */
1677
1678 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1679 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1680 16, /* rightshift */
1681 2, /* size (0 = byte, 1 = short, 2 = long) */
1682 16, /* bitsize */
1683 FALSE, /* pc_relative */
1684 0, /* bitpos */
1685 complain_overflow_dont, /* complain_on_overflow */
1686 ppc_elf_unhandled_reloc, /* special_function */
1687 "R_PPC_VLE_SDAREL_HA16D", /* name */
1688 FALSE, /* partial_inplace */
1689 0, /* src_mask */
1690 0x3e007ff, /* dst_mask */
1691 FALSE), /* pcrel_offset */
1692
1693 /* e_li split20 format. */
1694 HOWTO (R_PPC_VLE_ADDR20, /* type */
1695 16, /* rightshift */
1696 2, /* size (0 = byte, 1 = short, 2 = long) */
1697 20, /* bitsize */
1698 FALSE, /* pc_relative */
1699 0, /* bitpos */
1700 complain_overflow_dont, /* complain_on_overflow */
1701 bfd_elf_generic_reloc, /* special_function */
1702 "R_PPC_VLE_ADDR20", /* name */
1703 FALSE, /* partial_inplace */
1704 0, /* src_mask */
1705 0x1f07ff, /* dst_mask */
1706 FALSE), /* pcrel_offset */
1707
1708 HOWTO (R_PPC_IRELATIVE, /* type */
1709 0, /* rightshift */
1710 2, /* size (0 = byte, 1 = short, 2 = long) */
1711 32, /* bitsize */
1712 FALSE, /* pc_relative */
1713 0, /* bitpos */
1714 complain_overflow_dont, /* complain_on_overflow */
1715 ppc_elf_unhandled_reloc, /* special_function */
1716 "R_PPC_IRELATIVE", /* name */
1717 FALSE, /* partial_inplace */
1718 0, /* src_mask */
1719 0xffffffff, /* dst_mask */
1720 FALSE), /* pcrel_offset */
1721
1722 /* A 16 bit relative relocation. */
1723 HOWTO (R_PPC_REL16, /* type */
1724 0, /* rightshift */
1725 1, /* size (0 = byte, 1 = short, 2 = long) */
1726 16, /* bitsize */
1727 TRUE, /* pc_relative */
1728 0, /* bitpos */
1729 complain_overflow_signed, /* complain_on_overflow */
1730 bfd_elf_generic_reloc, /* special_function */
1731 "R_PPC_REL16", /* name */
1732 FALSE, /* partial_inplace */
1733 0, /* src_mask */
1734 0xffff, /* dst_mask */
1735 TRUE), /* pcrel_offset */
1736
1737 /* A 16 bit relative relocation without overflow. */
1738 HOWTO (R_PPC_REL16_LO, /* type */
1739 0, /* rightshift */
1740 1, /* size (0 = byte, 1 = short, 2 = long) */
1741 16, /* bitsize */
1742 TRUE, /* pc_relative */
1743 0, /* bitpos */
1744 complain_overflow_dont,/* complain_on_overflow */
1745 bfd_elf_generic_reloc, /* special_function */
1746 "R_PPC_REL16_LO", /* name */
1747 FALSE, /* partial_inplace */
1748 0, /* src_mask */
1749 0xffff, /* dst_mask */
1750 TRUE), /* pcrel_offset */
1751
1752 /* The high order 16 bits of a relative address. */
1753 HOWTO (R_PPC_REL16_HI, /* type */
1754 16, /* rightshift */
1755 1, /* size (0 = byte, 1 = short, 2 = long) */
1756 16, /* bitsize */
1757 TRUE, /* pc_relative */
1758 0, /* bitpos */
1759 complain_overflow_dont, /* complain_on_overflow */
1760 bfd_elf_generic_reloc, /* special_function */
1761 "R_PPC_REL16_HI", /* name */
1762 FALSE, /* partial_inplace */
1763 0, /* src_mask */
1764 0xffff, /* dst_mask */
1765 TRUE), /* pcrel_offset */
1766
1767 /* The high order 16 bits of a relative address, plus 1 if the contents of
1768 the low 16 bits, treated as a signed number, is negative. */
1769 HOWTO (R_PPC_REL16_HA, /* type */
1770 16, /* rightshift */
1771 1, /* size (0 = byte, 1 = short, 2 = long) */
1772 16, /* bitsize */
1773 TRUE, /* pc_relative */
1774 0, /* bitpos */
1775 complain_overflow_dont, /* complain_on_overflow */
1776 ppc_elf_addr16_ha_reloc, /* special_function */
1777 "R_PPC_REL16_HA", /* name */
1778 FALSE, /* partial_inplace */
1779 0, /* src_mask */
1780 0xffff, /* dst_mask */
1781 TRUE), /* pcrel_offset */
1782
1783 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1784 HOWTO (R_PPC_REL16DX_HA, /* type */
1785 16, /* rightshift */
1786 2, /* size (0 = byte, 1 = short, 2 = long) */
1787 16, /* bitsize */
1788 TRUE, /* pc_relative */
1789 0, /* bitpos */
1790 complain_overflow_signed, /* complain_on_overflow */
1791 ppc_elf_addr16_ha_reloc, /* special_function */
1792 "R_PPC_REL16DX_HA", /* name */
1793 FALSE, /* partial_inplace */
1794 0, /* src_mask */
1795 0x1fffc1, /* dst_mask */
1796 TRUE), /* pcrel_offset */
1797
1798 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1799 HOWTO (R_PPC_16DX_HA, /* type */
1800 16, /* rightshift */
1801 2, /* size (0 = byte, 1 = short, 2 = long) */
1802 16, /* bitsize */
1803 FALSE, /* pc_relative */
1804 0, /* bitpos */
1805 complain_overflow_signed, /* complain_on_overflow */
1806 ppc_elf_addr16_ha_reloc, /* special_function */
1807 "R_PPC_16DX_HA", /* name */
1808 FALSE, /* partial_inplace */
1809 0, /* src_mask */
1810 0x1fffc1, /* dst_mask */
1811 FALSE), /* pcrel_offset */
1812
1813 /* GNU extension to record C++ vtable hierarchy. */
1814 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1815 0, /* rightshift */
1816 0, /* size (0 = byte, 1 = short, 2 = long) */
1817 0, /* bitsize */
1818 FALSE, /* pc_relative */
1819 0, /* bitpos */
1820 complain_overflow_dont, /* complain_on_overflow */
1821 NULL, /* special_function */
1822 "R_PPC_GNU_VTINHERIT", /* name */
1823 FALSE, /* partial_inplace */
1824 0, /* src_mask */
1825 0, /* dst_mask */
1826 FALSE), /* pcrel_offset */
1827
1828 /* GNU extension to record C++ vtable member usage. */
1829 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1830 0, /* rightshift */
1831 0, /* size (0 = byte, 1 = short, 2 = long) */
1832 0, /* bitsize */
1833 FALSE, /* pc_relative */
1834 0, /* bitpos */
1835 complain_overflow_dont, /* complain_on_overflow */
1836 NULL, /* special_function */
1837 "R_PPC_GNU_VTENTRY", /* name */
1838 FALSE, /* partial_inplace */
1839 0, /* src_mask */
1840 0, /* dst_mask */
1841 FALSE), /* pcrel_offset */
1842
1843 /* Phony reloc to handle AIX style TOC entries. */
1844 HOWTO (R_PPC_TOC16, /* type */
1845 0, /* rightshift */
1846 1, /* size (0 = byte, 1 = short, 2 = long) */
1847 16, /* bitsize */
1848 FALSE, /* pc_relative */
1849 0, /* bitpos */
1850 complain_overflow_signed, /* complain_on_overflow */
1851 ppc_elf_unhandled_reloc, /* special_function */
1852 "R_PPC_TOC16", /* name */
1853 FALSE, /* partial_inplace */
1854 0, /* src_mask */
1855 0xffff, /* dst_mask */
1856 FALSE), /* pcrel_offset */
1857 };
1858 \f
1859 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1860
1861 static void
1862 ppc_elf_howto_init (void)
1863 {
1864 unsigned int i, type;
1865
1866 for (i = 0;
1867 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1868 i++)
1869 {
1870 type = ppc_elf_howto_raw[i].type;
1871 if (type >= (sizeof (ppc_elf_howto_table)
1872 / sizeof (ppc_elf_howto_table[0])))
1873 abort ();
1874 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1875 }
1876 }
1877
1878 static reloc_howto_type *
1879 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1880 bfd_reloc_code_real_type code)
1881 {
1882 enum elf_ppc_reloc_type r;
1883
1884 /* Initialize howto table if not already done. */
1885 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1886 ppc_elf_howto_init ();
1887
1888 switch (code)
1889 {
1890 default:
1891 return NULL;
1892
1893 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1894 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1895 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1896 case BFD_RELOC_PPC64_ADDR16_DS:
1897 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1898 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1899 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1900 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1901 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1902 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1903 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1904 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1905 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1906 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1907 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1908 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1909 case BFD_RELOC_PPC64_GOT16_DS:
1910 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1911 case BFD_RELOC_PPC64_GOT16_LO_DS:
1912 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1913 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1914 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1915 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1916 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1917 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1918 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1919 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1920 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1921 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1922 case BFD_RELOC_PPC64_PLT16_LO_DS:
1923 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1924 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1925 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1926 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1927 case BFD_RELOC_PPC64_SECTOFF_DS:
1928 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1929 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1930 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1931 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1932 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1933 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1934 case BFD_RELOC_PPC64_TOC16_DS:
1935 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1936 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1937 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1938 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1939 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1940 case BFD_RELOC_PPC64_TPREL16_DS:
1941 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1942 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1943 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1944 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1945 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1946 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1947 case BFD_RELOC_PPC64_DTPREL16_DS:
1948 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1949 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1950 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1951 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1952 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1953 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1954 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1955 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1956 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1957 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1958 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1959 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1960 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1961 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1962 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1963 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1964 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1965 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1966 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1967 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1968 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1969 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1970 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1971 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1972 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1973 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1974 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1975 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1976 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1977 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1978 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1979 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1980 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1981 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1982 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1983 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1984 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1985 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1986 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1987 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1988 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1989 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1990 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1991 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1992 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1993 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1994 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1995 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1996 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1997 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1998 r = R_PPC_VLE_SDAREL_LO16A;
1999 break;
2000 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
2001 r = R_PPC_VLE_SDAREL_LO16D;
2002 break;
2003 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
2004 r = R_PPC_VLE_SDAREL_HI16A;
2005 break;
2006 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
2007 r = R_PPC_VLE_SDAREL_HI16D;
2008 break;
2009 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
2010 r = R_PPC_VLE_SDAREL_HA16A;
2011 break;
2012 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
2013 r = R_PPC_VLE_SDAREL_HA16D;
2014 break;
2015 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2016 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2017 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2018 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2019 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
2020 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2021 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2022 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2023 }
2024
2025 return ppc_elf_howto_table[r];
2026 };
2027
2028 static reloc_howto_type *
2029 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2030 const char *r_name)
2031 {
2032 unsigned int i;
2033
2034 for (i = 0;
2035 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2036 i++)
2037 if (ppc_elf_howto_raw[i].name != NULL
2038 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2039 return &ppc_elf_howto_raw[i];
2040
2041 return NULL;
2042 }
2043
2044 /* Set the howto pointer for a PowerPC ELF reloc. */
2045
2046 static bfd_boolean
2047 ppc_elf_info_to_howto (bfd *abfd,
2048 arelent *cache_ptr,
2049 Elf_Internal_Rela *dst)
2050 {
2051 unsigned int r_type;
2052
2053 /* Initialize howto table if not already done. */
2054 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2055 ppc_elf_howto_init ();
2056
2057 r_type = ELF32_R_TYPE (dst->r_info);
2058 if (r_type >= R_PPC_max)
2059 {
2060 /* xgettext:c-format */
2061 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2062 abfd, r_type);
2063 bfd_set_error (bfd_error_bad_value);
2064 return FALSE;
2065 }
2066
2067 cache_ptr->howto = ppc_elf_howto_table[r_type];
2068
2069 /* Just because the above assert didn't trigger doesn't mean that
2070 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2071 if (cache_ptr->howto == NULL)
2072 {
2073 /* xgettext:c-format */
2074 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2075 abfd, r_type);
2076 bfd_set_error (bfd_error_bad_value);
2077
2078 return FALSE;
2079 }
2080
2081 return TRUE;
2082 }
2083
2084 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2085
2086 static bfd_reloc_status_type
2087 ppc_elf_addr16_ha_reloc (bfd *abfd,
2088 arelent *reloc_entry,
2089 asymbol *symbol,
2090 void *data,
2091 asection *input_section,
2092 bfd *output_bfd,
2093 char **error_message ATTRIBUTE_UNUSED)
2094 {
2095 enum elf_ppc_reloc_type r_type;
2096 long insn;
2097 bfd_size_type octets;
2098 bfd_vma value;
2099
2100 if (output_bfd != NULL)
2101 {
2102 reloc_entry->address += input_section->output_offset;
2103 return bfd_reloc_ok;
2104 }
2105
2106 reloc_entry->addend += 0x8000;
2107 r_type = reloc_entry->howto->type;
2108 if (r_type != R_PPC_REL16DX_HA)
2109 return bfd_reloc_continue;
2110
2111 value = 0;
2112 if (!bfd_is_com_section (symbol->section))
2113 value = symbol->value;
2114 value += (reloc_entry->addend
2115 + symbol->section->output_offset
2116 + symbol->section->output_section->vma);
2117 value -= (reloc_entry->address
2118 + input_section->output_offset
2119 + input_section->output_section->vma);
2120 value >>= 16;
2121
2122 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2123 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2124 insn &= ~0x1fffc1;
2125 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2126 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2127 return bfd_reloc_ok;
2128 }
2129
2130 static bfd_reloc_status_type
2131 ppc_elf_unhandled_reloc (bfd *abfd,
2132 arelent *reloc_entry,
2133 asymbol *symbol,
2134 void *data,
2135 asection *input_section,
2136 bfd *output_bfd,
2137 char **error_message)
2138 {
2139 /* If this is a relocatable link (output_bfd test tells us), just
2140 call the generic function. Any adjustment will be done at final
2141 link time. */
2142 if (output_bfd != NULL)
2143 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2144 input_section, output_bfd, error_message);
2145
2146 if (error_message != NULL)
2147 {
2148 static char buf[60];
2149 sprintf (buf, _("generic linker can't handle %s"),
2150 reloc_entry->howto->name);
2151 *error_message = buf;
2152 }
2153 return bfd_reloc_dangerous;
2154 }
2155 \f
2156 /* Sections created by the linker. */
2157
2158 typedef struct elf_linker_section
2159 {
2160 /* Pointer to the bfd section. */
2161 asection *section;
2162 /* Section name. */
2163 const char *name;
2164 /* Associated bss section name. */
2165 const char *bss_name;
2166 /* Associated symbol name. */
2167 const char *sym_name;
2168 /* Associated symbol. */
2169 struct elf_link_hash_entry *sym;
2170 } elf_linker_section_t;
2171
2172 /* Linked list of allocated pointer entries. This hangs off of the
2173 symbol lists, and provides allows us to return different pointers,
2174 based on different addend's. */
2175
2176 typedef struct elf_linker_section_pointers
2177 {
2178 /* next allocated pointer for this symbol */
2179 struct elf_linker_section_pointers *next;
2180 /* offset of pointer from beginning of section */
2181 bfd_vma offset;
2182 /* addend used */
2183 bfd_vma addend;
2184 /* which linker section this is */
2185 elf_linker_section_t *lsect;
2186 } elf_linker_section_pointers_t;
2187
2188 struct ppc_elf_obj_tdata
2189 {
2190 struct elf_obj_tdata elf;
2191
2192 /* A mapping from local symbols to offsets into the various linker
2193 sections added. This is index by the symbol index. */
2194 elf_linker_section_pointers_t **linker_section_pointers;
2195
2196 /* Flags used to auto-detect plt type. */
2197 unsigned int makes_plt_call : 1;
2198 unsigned int has_rel16 : 1;
2199 };
2200
2201 #define ppc_elf_tdata(bfd) \
2202 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2203
2204 #define elf_local_ptr_offsets(bfd) \
2205 (ppc_elf_tdata (bfd)->linker_section_pointers)
2206
2207 #define is_ppc_elf(bfd) \
2208 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2209 && elf_object_id (bfd) == PPC32_ELF_DATA)
2210
2211 /* Override the generic function because we store some extras. */
2212
2213 static bfd_boolean
2214 ppc_elf_mkobject (bfd *abfd)
2215 {
2216 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2217 PPC32_ELF_DATA);
2218 }
2219
2220 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2221
2222 bfd_boolean
2223 _bfd_elf_ppc_set_arch (bfd *abfd)
2224 {
2225 unsigned long mach = 0;
2226 asection *s;
2227 unsigned char *contents;
2228
2229 if (abfd->arch_info->bits_per_word == 32
2230 && bfd_big_endian (abfd))
2231 {
2232
2233 for (s = abfd->sections; s != NULL; s = s->next)
2234 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2235 break;
2236 if (s != NULL)
2237 mach = bfd_mach_ppc_vle;
2238 }
2239
2240 if (mach == 0)
2241 {
2242 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2243 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2244 {
2245 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2246 unsigned int i;
2247
2248 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2249 {
2250 unsigned int val = bfd_get_32 (abfd, contents + i);
2251 switch (val >> 16)
2252 {
2253 case PPC_APUINFO_PMR:
2254 case PPC_APUINFO_RFMCI:
2255 if (mach == 0)
2256 mach = bfd_mach_ppc_titan;
2257 break;
2258
2259 case PPC_APUINFO_ISEL:
2260 case PPC_APUINFO_CACHELCK:
2261 if (mach == bfd_mach_ppc_titan)
2262 mach = bfd_mach_ppc_e500mc;
2263 break;
2264
2265 case PPC_APUINFO_SPE:
2266 case PPC_APUINFO_EFS:
2267 case PPC_APUINFO_BRLOCK:
2268 if (mach != bfd_mach_ppc_vle)
2269 mach = bfd_mach_ppc_e500;
2270 break;
2271
2272 case PPC_APUINFO_VLE:
2273 mach = bfd_mach_ppc_vle;
2274 break;
2275
2276 default:
2277 mach = -1ul;
2278 }
2279 }
2280 free (contents);
2281 }
2282 }
2283
2284 if (mach != 0 && mach != -1ul)
2285 {
2286 const bfd_arch_info_type *arch;
2287
2288 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2289 if (arch->mach == mach)
2290 {
2291 abfd->arch_info = arch;
2292 break;
2293 }
2294 }
2295 return TRUE;
2296 }
2297
2298 /* Fix bad default arch selected for a 32 bit input bfd when the
2299 default is 64 bit. Also select arch based on apuinfo. */
2300
2301 static bfd_boolean
2302 ppc_elf_object_p (bfd *abfd)
2303 {
2304 if (!abfd->arch_info->the_default)
2305 return TRUE;
2306
2307 if (abfd->arch_info->bits_per_word == 64)
2308 {
2309 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2310
2311 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2312 {
2313 /* Relies on arch after 64 bit default being 32 bit default. */
2314 abfd->arch_info = abfd->arch_info->next;
2315 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2316 }
2317 }
2318 return _bfd_elf_ppc_set_arch (abfd);
2319 }
2320
2321 /* Function to set whether a module needs the -mrelocatable bit set. */
2322
2323 static bfd_boolean
2324 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2325 {
2326 BFD_ASSERT (!elf_flags_init (abfd)
2327 || elf_elfheader (abfd)->e_flags == flags);
2328
2329 elf_elfheader (abfd)->e_flags = flags;
2330 elf_flags_init (abfd) = TRUE;
2331 return TRUE;
2332 }
2333
2334 /* Support for core dump NOTE sections. */
2335
2336 static bfd_boolean
2337 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2338 {
2339 int offset;
2340 unsigned int size;
2341
2342 switch (note->descsz)
2343 {
2344 default:
2345 return FALSE;
2346
2347 case 268: /* Linux/PPC. */
2348 /* pr_cursig */
2349 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2350
2351 /* pr_pid */
2352 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2353
2354 /* pr_reg */
2355 offset = 72;
2356 size = 192;
2357
2358 break;
2359 }
2360
2361 /* Make a ".reg/999" section. */
2362 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2363 size, note->descpos + offset);
2364 }
2365
2366 static bfd_boolean
2367 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2368 {
2369 switch (note->descsz)
2370 {
2371 default:
2372 return FALSE;
2373
2374 case 128: /* Linux/PPC elf_prpsinfo. */
2375 elf_tdata (abfd)->core->pid
2376 = bfd_get_32 (abfd, note->descdata + 16);
2377 elf_tdata (abfd)->core->program
2378 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2379 elf_tdata (abfd)->core->command
2380 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2381 }
2382
2383 /* Note that for some reason, a spurious space is tacked
2384 onto the end of the args in some (at least one anyway)
2385 implementations, so strip it off if it exists. */
2386
2387 {
2388 char *command = elf_tdata (abfd)->core->command;
2389 int n = strlen (command);
2390
2391 if (0 < n && command[n - 1] == ' ')
2392 command[n - 1] = '\0';
2393 }
2394
2395 return TRUE;
2396 }
2397
2398 static char *
2399 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2400 {
2401 switch (note_type)
2402 {
2403 default:
2404 return NULL;
2405
2406 case NT_PRPSINFO:
2407 {
2408 char data[128] ATTRIBUTE_NONSTRING;
2409 va_list ap;
2410
2411 va_start (ap, note_type);
2412 memset (data, 0, sizeof (data));
2413 strncpy (data + 32, va_arg (ap, const char *), 16);
2414 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
2415 DIAGNOSTIC_PUSH;
2416 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
2417 -Wstringop-truncation:
2418 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
2419 */
2420 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
2421 #endif
2422 strncpy (data + 48, va_arg (ap, const char *), 80);
2423 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
2424 DIAGNOSTIC_POP;
2425 #endif
2426 va_end (ap);
2427 return elfcore_write_note (abfd, buf, bufsiz,
2428 "CORE", note_type, data, sizeof (data));
2429 }
2430
2431 case NT_PRSTATUS:
2432 {
2433 char data[268];
2434 va_list ap;
2435 long pid;
2436 int cursig;
2437 const void *greg;
2438
2439 va_start (ap, note_type);
2440 memset (data, 0, 72);
2441 pid = va_arg (ap, long);
2442 bfd_put_32 (abfd, pid, data + 24);
2443 cursig = va_arg (ap, int);
2444 bfd_put_16 (abfd, cursig, data + 12);
2445 greg = va_arg (ap, const void *);
2446 memcpy (data + 72, greg, 192);
2447 memset (data + 264, 0, 4);
2448 va_end (ap);
2449 return elfcore_write_note (abfd, buf, bufsiz,
2450 "CORE", note_type, data, sizeof (data));
2451 }
2452 }
2453 }
2454
2455 static flagword
2456 ppc_elf_lookup_section_flags (char *flag_name)
2457 {
2458
2459 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2460 return SHF_PPC_VLE;
2461
2462 return 0;
2463 }
2464
2465 /* Return address for Ith PLT stub in section PLT, for relocation REL
2466 or (bfd_vma) -1 if it should not be included. */
2467
2468 static bfd_vma
2469 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2470 const asection *plt ATTRIBUTE_UNUSED,
2471 const arelent *rel)
2472 {
2473 return rel->address;
2474 }
2475
2476 /* Handle a PowerPC specific section when reading an object file. This
2477 is called when bfd_section_from_shdr finds a section with an unknown
2478 type. */
2479
2480 static bfd_boolean
2481 ppc_elf_section_from_shdr (bfd *abfd,
2482 Elf_Internal_Shdr *hdr,
2483 const char *name,
2484 int shindex)
2485 {
2486 asection *newsect;
2487 flagword flags;
2488
2489 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2490 return FALSE;
2491
2492 newsect = hdr->bfd_section;
2493 flags = bfd_get_section_flags (abfd, newsect);
2494 if (hdr->sh_flags & SHF_EXCLUDE)
2495 flags |= SEC_EXCLUDE;
2496
2497 if (hdr->sh_type == SHT_ORDERED)
2498 flags |= SEC_SORT_ENTRIES;
2499
2500 bfd_set_section_flags (abfd, newsect, flags);
2501 return TRUE;
2502 }
2503
2504 /* Set up any other section flags and such that may be necessary. */
2505
2506 static bfd_boolean
2507 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2508 Elf_Internal_Shdr *shdr,
2509 asection *asect)
2510 {
2511 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2512 shdr->sh_type = SHT_ORDERED;
2513
2514 return TRUE;
2515 }
2516
2517 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2518 need to bump up the number of section headers. */
2519
2520 static int
2521 ppc_elf_additional_program_headers (bfd *abfd,
2522 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2523 {
2524 asection *s;
2525 int ret = 0;
2526
2527 s = bfd_get_section_by_name (abfd, ".sbss2");
2528 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2529 ++ret;
2530
2531 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2532 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2533 ++ret;
2534
2535 return ret;
2536 }
2537
2538 /* Modify the segment map for VLE executables. */
2539
2540 bfd_boolean
2541 ppc_elf_modify_segment_map (bfd *abfd,
2542 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2543 {
2544 struct elf_segment_map *m;
2545
2546 /* At this point in the link, output sections have already been sorted by
2547 LMA and assigned to segments. All that is left to do is to ensure
2548 there is no mixing of VLE & non-VLE sections in a text segment.
2549 If we find that case, we split the segment.
2550 We maintain the original output section order. */
2551
2552 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2553 {
2554 struct elf_segment_map *n;
2555 bfd_size_type amt;
2556 unsigned int j, k;
2557 unsigned int p_flags;
2558
2559 if (m->p_type != PT_LOAD || m->count == 0)
2560 continue;
2561
2562 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2563 {
2564 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2565 p_flags |= PF_W;
2566 if ((m->sections[j]->flags & SEC_CODE) != 0)
2567 {
2568 p_flags |= PF_X;
2569 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2570 p_flags |= PF_PPC_VLE;
2571 break;
2572 }
2573 }
2574 if (j != m->count)
2575 while (++j != m->count)
2576 {
2577 unsigned int p_flags1 = PF_R;
2578
2579 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2580 p_flags1 |= PF_W;
2581 if ((m->sections[j]->flags & SEC_CODE) != 0)
2582 {
2583 p_flags1 |= PF_X;
2584 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2585 p_flags1 |= PF_PPC_VLE;
2586 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2587 break;
2588 }
2589 p_flags |= p_flags1;
2590 }
2591 /* If we're splitting a segment which originally contained rw
2592 sections then those sections might now only be in one of the
2593 two parts. So always set p_flags if splitting, even if we
2594 are being called for objcopy with p_flags_valid set. */
2595 if (j != m->count || !m->p_flags_valid)
2596 {
2597 m->p_flags_valid = 1;
2598 m->p_flags = p_flags;
2599 }
2600 if (j == m->count)
2601 continue;
2602
2603 /* Sections 0..j-1 stay in this (current) segment,
2604 the remainder are put in a new segment.
2605 The scan resumes with the new segment. */
2606
2607 amt = sizeof (struct elf_segment_map);
2608 amt += (m->count - j - 1) * sizeof (asection *);
2609 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2610 if (n == NULL)
2611 return FALSE;
2612
2613 n->p_type = PT_LOAD;
2614 n->count = m->count - j;
2615 for (k = 0; k < n->count; ++k)
2616 n->sections[k] = m->sections[j + k];
2617 m->count = j;
2618 m->p_size_valid = 0;
2619 n->next = m->next;
2620 m->next = n;
2621 }
2622
2623 return TRUE;
2624 }
2625
2626 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2627 .PPC.EMB.sbss0 a normal section, and not a bss section so
2628 that the linker doesn't crater when trying to make more than
2629 2 sections. */
2630
2631 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2632 {
2633 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2634 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2635 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2636 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2637 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2638 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2639 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2640 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2641 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2642 { NULL, 0, 0, 0, 0 }
2643 };
2644
2645 /* This is what we want for new plt/got. */
2646 static struct bfd_elf_special_section ppc_alt_plt =
2647 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2648
2649 static const struct bfd_elf_special_section *
2650 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2651 {
2652 const struct bfd_elf_special_section *ssect;
2653
2654 /* See if this is one of the special sections. */
2655 if (sec->name == NULL)
2656 return NULL;
2657
2658 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2659 sec->use_rela_p);
2660 if (ssect != NULL)
2661 {
2662 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2663 ssect = &ppc_alt_plt;
2664 return ssect;
2665 }
2666
2667 return _bfd_elf_get_sec_type_attr (abfd, sec);
2668 }
2669 \f
2670 /* Very simple linked list structure for recording apuinfo values. */
2671 typedef struct apuinfo_list
2672 {
2673 struct apuinfo_list *next;
2674 unsigned long value;
2675 }
2676 apuinfo_list;
2677
2678 static apuinfo_list *head;
2679 static bfd_boolean apuinfo_set;
2680
2681 static void
2682 apuinfo_list_init (void)
2683 {
2684 head = NULL;
2685 apuinfo_set = FALSE;
2686 }
2687
2688 static void
2689 apuinfo_list_add (unsigned long value)
2690 {
2691 apuinfo_list *entry = head;
2692
2693 while (entry != NULL)
2694 {
2695 if (entry->value == value)
2696 return;
2697 entry = entry->next;
2698 }
2699
2700 entry = bfd_malloc (sizeof (* entry));
2701 if (entry == NULL)
2702 return;
2703
2704 entry->value = value;
2705 entry->next = head;
2706 head = entry;
2707 }
2708
2709 static unsigned
2710 apuinfo_list_length (void)
2711 {
2712 apuinfo_list *entry;
2713 unsigned long count;
2714
2715 for (entry = head, count = 0;
2716 entry;
2717 entry = entry->next)
2718 ++ count;
2719
2720 return count;
2721 }
2722
2723 static inline unsigned long
2724 apuinfo_list_element (unsigned long number)
2725 {
2726 apuinfo_list * entry;
2727
2728 for (entry = head;
2729 entry && number --;
2730 entry = entry->next)
2731 ;
2732
2733 return entry ? entry->value : 0;
2734 }
2735
2736 static void
2737 apuinfo_list_finish (void)
2738 {
2739 apuinfo_list *entry;
2740
2741 for (entry = head; entry;)
2742 {
2743 apuinfo_list *next = entry->next;
2744 free (entry);
2745 entry = next;
2746 }
2747
2748 head = NULL;
2749 }
2750
2751 /* Scan the input BFDs and create a linked list of
2752 the APUinfo values that will need to be emitted. */
2753
2754 static void
2755 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2756 {
2757 bfd *ibfd;
2758 asection *asec;
2759 char *buffer = NULL;
2760 bfd_size_type largest_input_size = 0;
2761 unsigned i;
2762 unsigned long length;
2763 const char *error_message = NULL;
2764
2765 if (link_info == NULL)
2766 return;
2767
2768 apuinfo_list_init ();
2769
2770 /* Read in the input sections contents. */
2771 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2772 {
2773 unsigned long datum;
2774
2775 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2776 if (asec == NULL)
2777 continue;
2778
2779 /* xgettext:c-format */
2780 error_message = _("corrupt %s section in %pB");
2781 length = asec->size;
2782 if (length < 20)
2783 goto fail;
2784
2785 apuinfo_set = TRUE;
2786 if (largest_input_size < asec->size)
2787 {
2788 if (buffer)
2789 free (buffer);
2790 largest_input_size = asec->size;
2791 buffer = bfd_malloc (largest_input_size);
2792 if (!buffer)
2793 return;
2794 }
2795
2796 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2797 || (bfd_bread (buffer, length, ibfd) != length))
2798 {
2799 /* xgettext:c-format */
2800 error_message = _("unable to read in %s section from %pB");
2801 goto fail;
2802 }
2803
2804 /* Verify the contents of the header. Note - we have to
2805 extract the values this way in order to allow for a
2806 host whose endian-ness is different from the target. */
2807 datum = bfd_get_32 (ibfd, buffer);
2808 if (datum != sizeof APUINFO_LABEL)
2809 goto fail;
2810
2811 datum = bfd_get_32 (ibfd, buffer + 8);
2812 if (datum != 0x2)
2813 goto fail;
2814
2815 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2816 goto fail;
2817
2818 /* Get the number of bytes used for apuinfo entries. */
2819 datum = bfd_get_32 (ibfd, buffer + 4);
2820 if (datum + 20 != length)
2821 goto fail;
2822
2823 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2824 for (i = 0; i < datum; i += 4)
2825 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2826 }
2827
2828 error_message = NULL;
2829
2830 if (apuinfo_set)
2831 {
2832 /* Compute the size of the output section. */
2833 unsigned num_entries = apuinfo_list_length ();
2834
2835 /* Set the output section size, if it exists. */
2836 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2837
2838 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2839 {
2840 ibfd = abfd;
2841 /* xgettext:c-format */
2842 error_message = _("warning: unable to set size of %s section in %pB");
2843 }
2844 }
2845
2846 fail:
2847 if (buffer)
2848 free (buffer);
2849
2850 if (error_message)
2851 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
2852 }
2853
2854 /* Prevent the output section from accumulating the input sections'
2855 contents. We have already stored this in our linked list structure. */
2856
2857 static bfd_boolean
2858 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2859 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2860 asection *asec,
2861 bfd_byte *contents ATTRIBUTE_UNUSED)
2862 {
2863 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2864 }
2865
2866 /* Finally we can generate the output section. */
2867
2868 static void
2869 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2870 {
2871 bfd_byte *buffer;
2872 asection *asec;
2873 unsigned i;
2874 unsigned num_entries;
2875 bfd_size_type length;
2876
2877 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2878 if (asec == NULL)
2879 return;
2880
2881 if (!apuinfo_set)
2882 return;
2883
2884 length = asec->size;
2885 if (length < 20)
2886 return;
2887
2888 buffer = bfd_malloc (length);
2889 if (buffer == NULL)
2890 {
2891 _bfd_error_handler
2892 (_("failed to allocate space for new APUinfo section"));
2893 return;
2894 }
2895
2896 /* Create the apuinfo header. */
2897 num_entries = apuinfo_list_length ();
2898 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2899 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2900 bfd_put_32 (abfd, 0x2, buffer + 8);
2901 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2902
2903 length = 20;
2904 for (i = 0; i < num_entries; i++)
2905 {
2906 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2907 length += 4;
2908 }
2909
2910 if (length != asec->size)
2911 _bfd_error_handler (_("failed to compute new APUinfo section"));
2912
2913 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2914 _bfd_error_handler (_("failed to install new APUinfo section"));
2915
2916 free (buffer);
2917
2918 apuinfo_list_finish ();
2919 }
2920 \f
2921 static bfd_boolean
2922 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2923 {
2924 bfd_byte buf[4 * 4];
2925
2926 if (!bfd_get_section_contents (abfd, glink, buf, off, sizeof buf))
2927 return FALSE;
2928
2929 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2930 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2931 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2932 && bfd_get_32 (abfd, buf + 12) == BCTR);
2933 }
2934
2935 static bfd_boolean
2936 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2937 {
2938 bfd_vma vma = *(bfd_vma *) ptr;
2939 return ((section->flags & SEC_ALLOC) != 0
2940 && section->vma <= vma
2941 && vma < section->vma + section->size);
2942 }
2943
2944 static long
2945 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2946 long dynsymcount, asymbol **dynsyms,
2947 asymbol **ret)
2948 {
2949 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2950 asection *plt, *relplt, *dynamic, *glink;
2951 bfd_vma glink_vma = 0;
2952 bfd_vma resolv_vma = 0;
2953 bfd_vma stub_off;
2954 asymbol *s;
2955 arelent *p;
2956 long count, i, stub_delta;
2957 size_t size;
2958 char *names;
2959 bfd_byte buf[4];
2960
2961 *ret = NULL;
2962
2963 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2964 return 0;
2965
2966 if (dynsymcount <= 0)
2967 return 0;
2968
2969 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2970 if (relplt == NULL)
2971 return 0;
2972
2973 plt = bfd_get_section_by_name (abfd, ".plt");
2974 if (plt == NULL)
2975 return 0;
2976
2977 /* Call common code to handle old-style executable PLTs. */
2978 if (elf_section_flags (plt) & SHF_EXECINSTR)
2979 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2980 dynsymcount, dynsyms, ret);
2981
2982 /* If this object was prelinked, the prelinker stored the address
2983 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2984 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2985 if (dynamic != NULL)
2986 {
2987 bfd_byte *dynbuf, *extdyn, *extdynend;
2988 size_t extdynsize;
2989 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2990
2991 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2992 return -1;
2993
2994 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2995 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2996
2997 extdyn = dynbuf;
2998 extdynend = extdyn + dynamic->size;
2999 for (; extdyn < extdynend; extdyn += extdynsize)
3000 {
3001 Elf_Internal_Dyn dyn;
3002 (*swap_dyn_in) (abfd, extdyn, &dyn);
3003
3004 if (dyn.d_tag == DT_NULL)
3005 break;
3006
3007 if (dyn.d_tag == DT_PPC_GOT)
3008 {
3009 unsigned int g_o_t = dyn.d_un.d_val;
3010 asection *got = bfd_get_section_by_name (abfd, ".got");
3011 if (got != NULL
3012 && bfd_get_section_contents (abfd, got, buf,
3013 g_o_t - got->vma + 4, 4))
3014 glink_vma = bfd_get_32 (abfd, buf);
3015 break;
3016 }
3017 }
3018 free (dynbuf);
3019 }
3020
3021 /* Otherwise we read the first plt entry. */
3022 if (glink_vma == 0)
3023 {
3024 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3025 glink_vma = bfd_get_32 (abfd, buf);
3026 }
3027
3028 if (glink_vma == 0)
3029 return 0;
3030
3031 /* The .glink section usually does not survive the final
3032 link; search for the section (usually .text) where the
3033 glink stubs now reside. */
3034 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3035 if (glink == NULL)
3036 return 0;
3037
3038 /* Determine glink PLT resolver by reading the relative branch
3039 from the first glink stub. */
3040 if (bfd_get_section_contents (abfd, glink, buf,
3041 glink_vma - glink->vma, 4))
3042 {
3043 unsigned int insn = bfd_get_32 (abfd, buf);
3044
3045 /* The first glink stub may either branch to the resolver ... */
3046 insn ^= B;
3047 if ((insn & ~0x3fffffc) == 0)
3048 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3049
3050 /* ... or fall through a bunch of NOPs. */
3051 else if ((insn ^ B ^ NOP) == 0)
3052 for (i = 4;
3053 bfd_get_section_contents (abfd, glink, buf,
3054 glink_vma - glink->vma + i, 4);
3055 i += 4)
3056 if (bfd_get_32 (abfd, buf) != NOP)
3057 {
3058 resolv_vma = glink_vma + i;
3059 break;
3060 }
3061 }
3062
3063 count = relplt->size / sizeof (Elf32_External_Rela);
3064 /* If the stubs are those for -shared/-pie then we might have
3065 multiple stubs for each plt entry. If that is the case then
3066 there is no way to associate stubs with their plt entries short
3067 of figuring out the GOT pointer value used in the stub.
3068 The offsets tested here need to cover all possible values of
3069 GLINK_ENTRY_SIZE for other than __tls_get_addr_opt. */
3070 stub_off = glink_vma - glink->vma;
3071 for (stub_delta = 16; stub_delta <= 32; stub_delta += 8)
3072 if (is_nonpic_glink_stub (abfd, glink, stub_off - stub_delta))
3073 break;
3074 if (stub_delta > 32)
3075 return 0;
3076
3077 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3078 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3079 return -1;
3080
3081 size = count * sizeof (asymbol);
3082 p = relplt->relocation;
3083 for (i = 0; i < count; i++, p++)
3084 {
3085 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3086 if (p->addend != 0)
3087 size += sizeof ("+0x") - 1 + 8;
3088 }
3089
3090 size += sizeof (asymbol) + sizeof ("__glink");
3091
3092 if (resolv_vma)
3093 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3094
3095 s = *ret = bfd_malloc (size);
3096 if (s == NULL)
3097 return -1;
3098
3099 stub_off = glink_vma - glink->vma;
3100 names = (char *) (s + count + 1 + (resolv_vma != 0));
3101 p = relplt->relocation + count - 1;
3102 for (i = 0; i < count; i++)
3103 {
3104 size_t len;
3105
3106 stub_off -= stub_delta;
3107 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3108 stub_off -= 32;
3109 *s = **p->sym_ptr_ptr;
3110 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3111 we are defining a symbol, ensure one of them is set. */
3112 if ((s->flags & BSF_LOCAL) == 0)
3113 s->flags |= BSF_GLOBAL;
3114 s->flags |= BSF_SYNTHETIC;
3115 s->section = glink;
3116 s->value = stub_off;
3117 s->name = names;
3118 s->udata.p = NULL;
3119 len = strlen ((*p->sym_ptr_ptr)->name);
3120 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3121 names += len;
3122 if (p->addend != 0)
3123 {
3124 memcpy (names, "+0x", sizeof ("+0x") - 1);
3125 names += sizeof ("+0x") - 1;
3126 bfd_sprintf_vma (abfd, names, p->addend);
3127 names += strlen (names);
3128 }
3129 memcpy (names, "@plt", sizeof ("@plt"));
3130 names += sizeof ("@plt");
3131 ++s;
3132 --p;
3133 }
3134
3135 /* Add a symbol at the start of the glink branch table. */
3136 memset (s, 0, sizeof *s);
3137 s->the_bfd = abfd;
3138 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3139 s->section = glink;
3140 s->value = glink_vma - glink->vma;
3141 s->name = names;
3142 memcpy (names, "__glink", sizeof ("__glink"));
3143 names += sizeof ("__glink");
3144 s++;
3145 count++;
3146
3147 if (resolv_vma)
3148 {
3149 /* Add a symbol for the glink PLT resolver. */
3150 memset (s, 0, sizeof *s);
3151 s->the_bfd = abfd;
3152 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3153 s->section = glink;
3154 s->value = resolv_vma - glink->vma;
3155 s->name = names;
3156 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3157 names += sizeof ("__glink_PLTresolve");
3158 s++;
3159 count++;
3160 }
3161
3162 return count;
3163 }
3164 \f
3165 /* The following functions are specific to the ELF linker, while
3166 functions above are used generally. They appear in this file more
3167 or less in the order in which they are called. eg.
3168 ppc_elf_check_relocs is called early in the link process,
3169 ppc_elf_finish_dynamic_sections is one of the last functions
3170 called. */
3171
3172 /* Track PLT entries needed for a given symbol. We might need more
3173 than one glink entry per symbol when generating a pic binary. */
3174 struct plt_entry
3175 {
3176 struct plt_entry *next;
3177
3178 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3179 This field stores the offset into .got2 used to initialise the
3180 GOT pointer reg. It will always be at least 32768. (Current
3181 gcc always uses an offset of 32768, but ld -r will pack .got2
3182 sections together resulting in larger offsets). */
3183 bfd_vma addend;
3184
3185 /* The .got2 section. */
3186 asection *sec;
3187
3188 /* PLT refcount or offset. */
3189 union
3190 {
3191 bfd_signed_vma refcount;
3192 bfd_vma offset;
3193 } plt;
3194
3195 /* .glink stub offset. */
3196 bfd_vma glink_offset;
3197 };
3198
3199 /* Of those relocs that might be copied as dynamic relocs, this
3200 function selects those that must be copied when linking a shared
3201 library or PIE, even when the symbol is local. */
3202
3203 static int
3204 must_be_dyn_reloc (struct bfd_link_info *info,
3205 enum elf_ppc_reloc_type r_type)
3206 {
3207 switch (r_type)
3208 {
3209 default:
3210 /* Only relative relocs can be resolved when the object load
3211 address isn't fixed. DTPREL32 is excluded because the
3212 dynamic linker needs to differentiate global dynamic from
3213 local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
3214 return 1;
3215
3216 case R_PPC_REL24:
3217 case R_PPC_REL14:
3218 case R_PPC_REL14_BRTAKEN:
3219 case R_PPC_REL14_BRNTAKEN:
3220 case R_PPC_REL32:
3221 return 0;
3222
3223 case R_PPC_TPREL32:
3224 case R_PPC_TPREL16:
3225 case R_PPC_TPREL16_LO:
3226 case R_PPC_TPREL16_HI:
3227 case R_PPC_TPREL16_HA:
3228 /* These relocations are relative but in a shared library the
3229 linker doesn't know the thread pointer base. */
3230 return bfd_link_dll (info);
3231 }
3232 }
3233
3234 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3235 copying dynamic variables from a shared lib into an app's dynbss
3236 section, and instead use a dynamic relocation to point into the
3237 shared lib. */
3238 #define ELIMINATE_COPY_RELOCS 1
3239
3240 /* Used to track dynamic relocations for local symbols. */
3241 struct ppc_dyn_relocs
3242 {
3243 struct ppc_dyn_relocs *next;
3244
3245 /* The input section of the reloc. */
3246 asection *sec;
3247
3248 /* Total number of relocs copied for the input section. */
3249 unsigned int count : 31;
3250
3251 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3252 unsigned int ifunc : 1;
3253 };
3254
3255 /* PPC ELF linker hash entry. */
3256
3257 struct ppc_elf_link_hash_entry
3258 {
3259 struct elf_link_hash_entry elf;
3260
3261 /* If this symbol is used in the linker created sections, the processor
3262 specific backend uses this field to map the field into the offset
3263 from the beginning of the section. */
3264 elf_linker_section_pointers_t *linker_section_pointer;
3265
3266 /* Track dynamic relocs copied for this symbol. */
3267 struct elf_dyn_relocs *dyn_relocs;
3268
3269 /* Contexts in which symbol is used in the GOT.
3270 Bits are or'd into the mask as the corresponding relocs are
3271 encountered during check_relocs, with TLS_TLS being set when any
3272 of the other TLS bits are set. tls_optimize clears bits when
3273 optimizing to indicate the corresponding GOT entry type is not
3274 needed. If set, TLS_TLS is never cleared. tls_optimize may also
3275 set TLS_TPRELGD when a GD reloc turns into a TPREL one. We use a
3276 separate flag rather than setting TPREL just for convenience in
3277 distinguishing the two cases.
3278 These flags are also kept for local symbols. */
3279 #define TLS_TLS 1 /* Any TLS reloc. */
3280 #define TLS_GD 2 /* GD reloc. */
3281 #define TLS_LD 4 /* LD reloc. */
3282 #define TLS_TPREL 8 /* TPREL reloc, => IE. */
3283 #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */
3284 #define TLS_MARK 32 /* __tls_get_addr call marked. */
3285 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */
3286 unsigned char tls_mask;
3287
3288 /* The above field is also used to mark function symbols. In which
3289 case TLS_TLS will be 0. */
3290 #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */
3291 #define PLT_KEEP 4 /* inline plt call requires plt entry. */
3292 #define NON_GOT 256 /* local symbol plt, not stored. */
3293
3294 /* Nonzero if we have seen a small data relocation referring to this
3295 symbol. */
3296 unsigned char has_sda_refs : 1;
3297
3298 /* Flag use of given relocations. */
3299 unsigned char has_addr16_ha : 1;
3300 unsigned char has_addr16_lo : 1;
3301 };
3302
3303 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3304
3305 /* PPC ELF linker hash table. */
3306
3307 struct ppc_elf_link_hash_table
3308 {
3309 struct elf_link_hash_table elf;
3310
3311 /* Various options passed from the linker. */
3312 struct ppc_elf_params *params;
3313
3314 /* Short-cuts to get to dynamic linker sections. */
3315 asection *glink;
3316 asection *dynsbss;
3317 asection *relsbss;
3318 elf_linker_section_t sdata[2];
3319 asection *sbss;
3320 asection *glink_eh_frame;
3321 asection *pltlocal;
3322 asection *relpltlocal;
3323
3324 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3325 asection *srelplt2;
3326
3327 /* Shortcut to __tls_get_addr. */
3328 struct elf_link_hash_entry *tls_get_addr;
3329
3330 /* The bfd that forced an old-style PLT. */
3331 bfd *old_bfd;
3332
3333 /* TLS local dynamic got entry handling. */
3334 union {
3335 bfd_signed_vma refcount;
3336 bfd_vma offset;
3337 } tlsld_got;
3338
3339 /* Offset of branch table to PltResolve function in glink. */
3340 bfd_vma glink_pltresolve;
3341
3342 /* Size of reserved GOT entries. */
3343 unsigned int got_header_size;
3344 /* Non-zero if allocating the header left a gap. */
3345 unsigned int got_gap;
3346
3347 /* The type of PLT we have chosen to use. */
3348 enum ppc_elf_plt_type plt_type;
3349
3350 /* True if the target system is VxWorks. */
3351 unsigned int is_vxworks:1;
3352
3353 /* Whether there exist local gnu indirect function resolvers,
3354 referenced by dynamic relocations. */
3355 unsigned int local_ifunc_resolver:1;
3356 unsigned int maybe_local_ifunc_resolver:1;
3357
3358 /* Set if tls optimization is enabled. */
3359 unsigned int do_tls_opt:1;
3360
3361 /* Set if inline plt calls should be converted to direct calls. */
3362 unsigned int can_convert_all_inline_plt:1;
3363
3364 /* The size of PLT entries. */
3365 int plt_entry_size;
3366 /* The distance between adjacent PLT slots. */
3367 int plt_slot_size;
3368 /* The size of the first PLT entry. */
3369 int plt_initial_entry_size;
3370
3371 /* Small local sym cache. */
3372 struct sym_cache sym_cache;
3373 };
3374
3375 /* Rename some of the generic section flags to better document how they
3376 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3377
3378 /* Nonzero if this section has TLS related relocations. */
3379 #define has_tls_reloc sec_flg0
3380
3381 /* Nonzero if this section has a call to __tls_get_addr. */
3382 #define has_tls_get_addr_call sec_flg1
3383
3384 /* Flag set when PLTCALL relocs are detected. */
3385 #define has_pltcall sec_flg2
3386
3387 /* Get the PPC ELF linker hash table from a link_info structure. */
3388
3389 #define ppc_elf_hash_table(p) \
3390 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3391 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3392
3393 /* Create an entry in a PPC ELF linker hash table. */
3394
3395 static struct bfd_hash_entry *
3396 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3397 struct bfd_hash_table *table,
3398 const char *string)
3399 {
3400 /* Allocate the structure if it has not already been allocated by a
3401 subclass. */
3402 if (entry == NULL)
3403 {
3404 entry = bfd_hash_allocate (table,
3405 sizeof (struct ppc_elf_link_hash_entry));
3406 if (entry == NULL)
3407 return entry;
3408 }
3409
3410 /* Call the allocation method of the superclass. */
3411 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3412 if (entry != NULL)
3413 {
3414 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3415 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3416 ppc_elf_hash_entry (entry)->tls_mask = 0;
3417 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3418 }
3419
3420 return entry;
3421 }
3422
3423 /* Create a PPC ELF linker hash table. */
3424
3425 static struct bfd_link_hash_table *
3426 ppc_elf_link_hash_table_create (bfd *abfd)
3427 {
3428 struct ppc_elf_link_hash_table *ret;
3429 static struct ppc_elf_params default_params
3430 = { PLT_OLD, 0, 0, 1, 0, 0, 12, 0, 0, 0 };
3431
3432 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3433 if (ret == NULL)
3434 return NULL;
3435
3436 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3437 ppc_elf_link_hash_newfunc,
3438 sizeof (struct ppc_elf_link_hash_entry),
3439 PPC32_ELF_DATA))
3440 {
3441 free (ret);
3442 return NULL;
3443 }
3444
3445 ret->elf.init_plt_refcount.refcount = 0;
3446 ret->elf.init_plt_refcount.glist = NULL;
3447 ret->elf.init_plt_offset.offset = 0;
3448 ret->elf.init_plt_offset.glist = NULL;
3449
3450 ret->params = &default_params;
3451
3452 ret->sdata[0].name = ".sdata";
3453 ret->sdata[0].sym_name = "_SDA_BASE_";
3454 ret->sdata[0].bss_name = ".sbss";
3455
3456 ret->sdata[1].name = ".sdata2";
3457 ret->sdata[1].sym_name = "_SDA2_BASE_";
3458 ret->sdata[1].bss_name = ".sbss2";
3459
3460 ret->plt_entry_size = 12;
3461 ret->plt_slot_size = 8;
3462 ret->plt_initial_entry_size = 72;
3463
3464 return &ret->elf.root;
3465 }
3466
3467 /* Hook linker params into hash table. */
3468
3469 void
3470 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3471 {
3472 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3473
3474 if (htab)
3475 htab->params = params;
3476 params->pagesize_p2 = bfd_log2 (params->pagesize);
3477 }
3478
3479 /* Create .got and the related sections. */
3480
3481 static bfd_boolean
3482 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3483 {
3484 struct ppc_elf_link_hash_table *htab;
3485
3486 if (!_bfd_elf_create_got_section (abfd, info))
3487 return FALSE;
3488
3489 htab = ppc_elf_hash_table (info);
3490 if (!htab->is_vxworks)
3491 {
3492 /* The powerpc .got has a blrl instruction in it. Mark it
3493 executable. */
3494 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3495 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3496 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3497 return FALSE;
3498 }
3499
3500 return TRUE;
3501 }
3502
3503 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3504 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3505 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3506
3507 static bfd_boolean
3508 ppc_elf_create_linker_section (bfd *abfd,
3509 struct bfd_link_info *info,
3510 flagword flags,
3511 elf_linker_section_t *lsect)
3512 {
3513 asection *s;
3514
3515 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3516 | SEC_LINKER_CREATED);
3517
3518 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3519 if (s == NULL)
3520 return FALSE;
3521 lsect->section = s;
3522
3523 /* Define the sym on the first section of this name. */
3524 s = bfd_get_section_by_name (abfd, lsect->name);
3525
3526 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3527 if (lsect->sym == NULL)
3528 return FALSE;
3529 lsect->sym->root.u.def.value = 0x8000;
3530 return TRUE;
3531 }
3532
3533 static bfd_boolean
3534 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3535 {
3536 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3537 asection *s;
3538 flagword flags;
3539 int p2align;
3540
3541 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3542 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3543 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3544 htab->glink = s;
3545 p2align = htab->params->ppc476_workaround ? 6 : 4;
3546 if (p2align < htab->params->plt_stub_align)
3547 p2align = htab->params->plt_stub_align;
3548 if (s == NULL
3549 || !bfd_set_section_alignment (abfd, s, p2align))
3550 return FALSE;
3551
3552 if (!info->no_ld_generated_unwind_info)
3553 {
3554 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3555 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3556 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3557 htab->glink_eh_frame = s;
3558 if (s == NULL
3559 || !bfd_set_section_alignment (abfd, s, 2))
3560 return FALSE;
3561 }
3562
3563 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3564 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3565 htab->elf.iplt = s;
3566 if (s == NULL
3567 || !bfd_set_section_alignment (abfd, s, 4))
3568 return FALSE;
3569
3570 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3571 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3572 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3573 htab->elf.irelplt = s;
3574 if (s == NULL
3575 || ! bfd_set_section_alignment (abfd, s, 2))
3576 return FALSE;
3577
3578 /* Local plt entries. */
3579 flags = (SEC_ALLOC | SEC_LOAD
3580 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3581 htab->pltlocal = bfd_make_section_anyway_with_flags (abfd, ".branch_lt",
3582 flags);
3583 if (htab->pltlocal == NULL
3584 || ! bfd_set_section_alignment (abfd, htab->pltlocal, 2))
3585 return FALSE;
3586
3587 if (bfd_link_pic (info))
3588 {
3589 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
3590 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3591 htab->relpltlocal
3592 = bfd_make_section_anyway_with_flags (abfd, ".rela.branch_lt", flags);
3593 if (htab->relpltlocal == NULL
3594 || ! bfd_set_section_alignment (abfd, htab->relpltlocal, 2))
3595 return FALSE;
3596 }
3597
3598 if (!ppc_elf_create_linker_section (abfd, info, 0,
3599 &htab->sdata[0]))
3600 return FALSE;
3601
3602 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3603 &htab->sdata[1]))
3604 return FALSE;
3605
3606 return TRUE;
3607 }
3608
3609 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3610 to output sections (just like _bfd_elf_create_dynamic_sections has
3611 to create .dynbss and .rela.bss). */
3612
3613 static bfd_boolean
3614 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3615 {
3616 struct ppc_elf_link_hash_table *htab;
3617 asection *s;
3618 flagword flags;
3619
3620 htab = ppc_elf_hash_table (info);
3621
3622 if (htab->elf.sgot == NULL
3623 && !ppc_elf_create_got (abfd, info))
3624 return FALSE;
3625
3626 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3627 return FALSE;
3628
3629 if (htab->glink == NULL
3630 && !ppc_elf_create_glink (abfd, info))
3631 return FALSE;
3632
3633 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3634 SEC_ALLOC | SEC_LINKER_CREATED);
3635 htab->dynsbss = s;
3636 if (s == NULL)
3637 return FALSE;
3638
3639 if (! bfd_link_pic (info))
3640 {
3641 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3642 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3643 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3644 htab->relsbss = s;
3645 if (s == NULL
3646 || ! bfd_set_section_alignment (abfd, s, 2))
3647 return FALSE;
3648 }
3649
3650 if (htab->is_vxworks
3651 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3652 return FALSE;
3653
3654 s = htab->elf.splt;
3655 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3656 if (htab->plt_type == PLT_VXWORKS)
3657 /* The VxWorks PLT is a loaded section with contents. */
3658 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3659 return bfd_set_section_flags (abfd, s, flags);
3660 }
3661
3662 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3663
3664 static void
3665 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3666 struct elf_link_hash_entry *dir,
3667 struct elf_link_hash_entry *ind)
3668 {
3669 struct ppc_elf_link_hash_entry *edir, *eind;
3670
3671 edir = (struct ppc_elf_link_hash_entry *) dir;
3672 eind = (struct ppc_elf_link_hash_entry *) ind;
3673
3674 edir->tls_mask |= eind->tls_mask;
3675 edir->has_sda_refs |= eind->has_sda_refs;
3676
3677 if (edir->elf.versioned != versioned_hidden)
3678 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3679 edir->elf.ref_regular |= eind->elf.ref_regular;
3680 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3681 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3682 edir->elf.needs_plt |= eind->elf.needs_plt;
3683 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3684
3685 /* If we were called to copy over info for a weak sym, that's all. */
3686 if (eind->elf.root.type != bfd_link_hash_indirect)
3687 return;
3688
3689 if (eind->dyn_relocs != NULL)
3690 {
3691 if (edir->dyn_relocs != NULL)
3692 {
3693 struct elf_dyn_relocs **pp;
3694 struct elf_dyn_relocs *p;
3695
3696 /* Add reloc counts against the indirect sym to the direct sym
3697 list. Merge any entries against the same section. */
3698 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3699 {
3700 struct elf_dyn_relocs *q;
3701
3702 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3703 if (q->sec == p->sec)
3704 {
3705 q->pc_count += p->pc_count;
3706 q->count += p->count;
3707 *pp = p->next;
3708 break;
3709 }
3710 if (q == NULL)
3711 pp = &p->next;
3712 }
3713 *pp = edir->dyn_relocs;
3714 }
3715
3716 edir->dyn_relocs = eind->dyn_relocs;
3717 eind->dyn_relocs = NULL;
3718 }
3719
3720 /* Copy over the GOT refcount entries that we may have already seen to
3721 the symbol which just became indirect. */
3722 edir->elf.got.refcount += eind->elf.got.refcount;
3723 eind->elf.got.refcount = 0;
3724
3725 /* And plt entries. */
3726 if (eind->elf.plt.plist != NULL)
3727 {
3728 if (edir->elf.plt.plist != NULL)
3729 {
3730 struct plt_entry **entp;
3731 struct plt_entry *ent;
3732
3733 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3734 {
3735 struct plt_entry *dent;
3736
3737 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3738 if (dent->sec == ent->sec && dent->addend == ent->addend)
3739 {
3740 dent->plt.refcount += ent->plt.refcount;
3741 *entp = ent->next;
3742 break;
3743 }
3744 if (dent == NULL)
3745 entp = &ent->next;
3746 }
3747 *entp = edir->elf.plt.plist;
3748 }
3749
3750 edir->elf.plt.plist = eind->elf.plt.plist;
3751 eind->elf.plt.plist = NULL;
3752 }
3753
3754 if (eind->elf.dynindx != -1)
3755 {
3756 if (edir->elf.dynindx != -1)
3757 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3758 edir->elf.dynstr_index);
3759 edir->elf.dynindx = eind->elf.dynindx;
3760 edir->elf.dynstr_index = eind->elf.dynstr_index;
3761 eind->elf.dynindx = -1;
3762 eind->elf.dynstr_index = 0;
3763 }
3764 }
3765
3766 /* Hook called by the linker routine which adds symbols from an object
3767 file. We use it to put .comm items in .sbss, and not .bss. */
3768
3769 static bfd_boolean
3770 ppc_elf_add_symbol_hook (bfd *abfd,
3771 struct bfd_link_info *info,
3772 Elf_Internal_Sym *sym,
3773 const char **namep ATTRIBUTE_UNUSED,
3774 flagword *flagsp ATTRIBUTE_UNUSED,
3775 asection **secp,
3776 bfd_vma *valp)
3777 {
3778 if (sym->st_shndx == SHN_COMMON
3779 && !bfd_link_relocatable (info)
3780 && is_ppc_elf (info->output_bfd)
3781 && sym->st_size <= elf_gp_size (abfd))
3782 {
3783 /* Common symbols less than or equal to -G nn bytes are automatically
3784 put into .sbss. */
3785 struct ppc_elf_link_hash_table *htab;
3786
3787 htab = ppc_elf_hash_table (info);
3788 if (htab->sbss == NULL)
3789 {
3790 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3791
3792 if (!htab->elf.dynobj)
3793 htab->elf.dynobj = abfd;
3794
3795 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3796 ".sbss",
3797 flags);
3798 if (htab->sbss == NULL)
3799 return FALSE;
3800 }
3801
3802 *secp = htab->sbss;
3803 *valp = sym->st_size;
3804 }
3805
3806 return TRUE;
3807 }
3808 \f
3809 /* Find a linker generated pointer with a given addend and type. */
3810
3811 static elf_linker_section_pointers_t *
3812 elf_find_pointer_linker_section
3813 (elf_linker_section_pointers_t *linker_pointers,
3814 bfd_vma addend,
3815 elf_linker_section_t *lsect)
3816 {
3817 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3818 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3819 return linker_pointers;
3820
3821 return NULL;
3822 }
3823
3824 /* Allocate a pointer to live in a linker created section. */
3825
3826 static bfd_boolean
3827 elf_allocate_pointer_linker_section (bfd *abfd,
3828 elf_linker_section_t *lsect,
3829 struct elf_link_hash_entry *h,
3830 const Elf_Internal_Rela *rel)
3831 {
3832 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3833 elf_linker_section_pointers_t *linker_section_ptr;
3834 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3835 bfd_size_type amt;
3836
3837 BFD_ASSERT (lsect != NULL);
3838
3839 /* Is this a global symbol? */
3840 if (h != NULL)
3841 {
3842 struct ppc_elf_link_hash_entry *eh;
3843
3844 /* Has this symbol already been allocated? If so, our work is done. */
3845 eh = (struct ppc_elf_link_hash_entry *) h;
3846 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3847 rel->r_addend,
3848 lsect))
3849 return TRUE;
3850
3851 ptr_linker_section_ptr = &eh->linker_section_pointer;
3852 }
3853 else
3854 {
3855 BFD_ASSERT (is_ppc_elf (abfd));
3856
3857 /* Allocation of a pointer to a local symbol. */
3858 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3859
3860 /* Allocate a table to hold the local symbols if first time. */
3861 if (!ptr)
3862 {
3863 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3864
3865 amt = num_symbols;
3866 amt *= sizeof (elf_linker_section_pointers_t *);
3867 ptr = bfd_zalloc (abfd, amt);
3868
3869 if (!ptr)
3870 return FALSE;
3871
3872 elf_local_ptr_offsets (abfd) = ptr;
3873 }
3874
3875 /* Has this symbol already been allocated? If so, our work is done. */
3876 if (elf_find_pointer_linker_section (ptr[r_symndx],
3877 rel->r_addend,
3878 lsect))
3879 return TRUE;
3880
3881 ptr_linker_section_ptr = &ptr[r_symndx];
3882 }
3883
3884 /* Allocate space for a pointer in the linker section, and allocate
3885 a new pointer record from internal memory. */
3886 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3887 amt = sizeof (elf_linker_section_pointers_t);
3888 linker_section_ptr = bfd_alloc (abfd, amt);
3889
3890 if (!linker_section_ptr)
3891 return FALSE;
3892
3893 linker_section_ptr->next = *ptr_linker_section_ptr;
3894 linker_section_ptr->addend = rel->r_addend;
3895 linker_section_ptr->lsect = lsect;
3896 *ptr_linker_section_ptr = linker_section_ptr;
3897
3898 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3899 return FALSE;
3900 linker_section_ptr->offset = lsect->section->size;
3901 lsect->section->size += 4;
3902
3903 #ifdef DEBUG
3904 fprintf (stderr,
3905 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3906 lsect->name, (long) linker_section_ptr->offset,
3907 (long) lsect->section->size);
3908 #endif
3909
3910 return TRUE;
3911 }
3912
3913 static struct plt_entry **
3914 update_local_sym_info (bfd *abfd,
3915 Elf_Internal_Shdr *symtab_hdr,
3916 unsigned long r_symndx,
3917 int tls_type)
3918 {
3919 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3920 struct plt_entry **local_plt;
3921 unsigned char *local_got_tls_masks;
3922
3923 if (local_got_refcounts == NULL)
3924 {
3925 bfd_size_type size = symtab_hdr->sh_info;
3926
3927 size *= (sizeof (*local_got_refcounts)
3928 + sizeof (*local_plt)
3929 + sizeof (*local_got_tls_masks));
3930 local_got_refcounts = bfd_zalloc (abfd, size);
3931 if (local_got_refcounts == NULL)
3932 return NULL;
3933 elf_local_got_refcounts (abfd) = local_got_refcounts;
3934 }
3935
3936 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3937 local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info);
3938 local_got_tls_masks[r_symndx] |= tls_type & 0xff;
3939 if ((tls_type & NON_GOT) == 0)
3940 local_got_refcounts[r_symndx] += 1;
3941 return local_plt + r_symndx;
3942 }
3943
3944 static bfd_boolean
3945 update_plt_info (bfd *abfd, struct plt_entry **plist,
3946 asection *sec, bfd_vma addend)
3947 {
3948 struct plt_entry *ent;
3949
3950 if (addend < 32768)
3951 sec = NULL;
3952 for (ent = *plist; ent != NULL; ent = ent->next)
3953 if (ent->sec == sec && ent->addend == addend)
3954 break;
3955 if (ent == NULL)
3956 {
3957 bfd_size_type amt = sizeof (*ent);
3958 ent = bfd_alloc (abfd, amt);
3959 if (ent == NULL)
3960 return FALSE;
3961 ent->next = *plist;
3962 ent->sec = sec;
3963 ent->addend = addend;
3964 ent->plt.refcount = 0;
3965 *plist = ent;
3966 }
3967 ent->plt.refcount += 1;
3968 return TRUE;
3969 }
3970
3971 static struct plt_entry *
3972 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3973 {
3974 struct plt_entry *ent;
3975
3976 if (addend < 32768)
3977 sec = NULL;
3978 for (ent = *plist; ent != NULL; ent = ent->next)
3979 if (ent->sec == sec && ent->addend == addend)
3980 break;
3981 return ent;
3982 }
3983
3984 static bfd_boolean
3985 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3986 {
3987 return (r_type == R_PPC_PLTREL24
3988 || r_type == R_PPC_LOCAL24PC
3989 || r_type == R_PPC_REL24
3990 || r_type == R_PPC_REL14
3991 || r_type == R_PPC_REL14_BRTAKEN
3992 || r_type == R_PPC_REL14_BRNTAKEN
3993 || r_type == R_PPC_ADDR24
3994 || r_type == R_PPC_ADDR14
3995 || r_type == R_PPC_ADDR14_BRTAKEN
3996 || r_type == R_PPC_ADDR14_BRNTAKEN
3997 || r_type == R_PPC_VLE_REL24);
3998 }
3999
4000 /* Relocs on inline plt call sequence insns prior to the call. */
4001
4002 static bfd_boolean
4003 is_plt_seq_reloc (enum elf_ppc_reloc_type r_type)
4004 {
4005 return (r_type == R_PPC_PLT16_HA
4006 || r_type == R_PPC_PLT16_HI
4007 || r_type == R_PPC_PLT16_LO
4008 || r_type == R_PPC_PLTSEQ);
4009 }
4010
4011 static void
4012 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
4013 {
4014 _bfd_error_handler
4015 /* xgettext:c-format */
4016 (_("%pB: relocation %s cannot be used when making a shared object"),
4017 abfd,
4018 ppc_elf_howto_table[r_type]->name);
4019 bfd_set_error (bfd_error_bad_value);
4020 }
4021
4022 /* Look through the relocs for a section during the first phase, and
4023 allocate space in the global offset table or procedure linkage
4024 table. */
4025
4026 static bfd_boolean
4027 ppc_elf_check_relocs (bfd *abfd,
4028 struct bfd_link_info *info,
4029 asection *sec,
4030 const Elf_Internal_Rela *relocs)
4031 {
4032 struct ppc_elf_link_hash_table *htab;
4033 Elf_Internal_Shdr *symtab_hdr;
4034 struct elf_link_hash_entry **sym_hashes;
4035 const Elf_Internal_Rela *rel;
4036 const Elf_Internal_Rela *rel_end;
4037 asection *got2, *sreloc;
4038 struct elf_link_hash_entry *tga;
4039
4040 if (bfd_link_relocatable (info))
4041 return TRUE;
4042
4043 /* Don't do anything special with non-loaded, non-alloced sections.
4044 In particular, any relocs in such sections should not affect GOT
4045 and PLT reference counting (ie. we don't allow them to create GOT
4046 or PLT entries), there's no possibility or desire to optimize TLS
4047 relocs, and there's not much point in propagating relocs to shared
4048 libs that the dynamic linker won't relocate. */
4049 if ((sec->flags & SEC_ALLOC) == 0)
4050 return TRUE;
4051
4052 #ifdef DEBUG
4053 _bfd_error_handler ("ppc_elf_check_relocs called for section %pA in %pB",
4054 sec, abfd);
4055 #endif
4056
4057 BFD_ASSERT (is_ppc_elf (abfd));
4058
4059 /* Initialize howto table if not already done. */
4060 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4061 ppc_elf_howto_init ();
4062
4063 htab = ppc_elf_hash_table (info);
4064 if (htab->glink == NULL)
4065 {
4066 if (htab->elf.dynobj == NULL)
4067 htab->elf.dynobj = abfd;
4068 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4069 return FALSE;
4070 }
4071 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4072 FALSE, FALSE, TRUE);
4073 symtab_hdr = &elf_symtab_hdr (abfd);
4074 sym_hashes = elf_sym_hashes (abfd);
4075 got2 = bfd_get_section_by_name (abfd, ".got2");
4076 sreloc = NULL;
4077
4078 rel_end = relocs + sec->reloc_count;
4079 for (rel = relocs; rel < rel_end; rel++)
4080 {
4081 unsigned long r_symndx;
4082 enum elf_ppc_reloc_type r_type;
4083 struct elf_link_hash_entry *h;
4084 int tls_type;
4085 struct plt_entry **ifunc;
4086 struct plt_entry **pltent;
4087 bfd_vma addend;
4088
4089 r_symndx = ELF32_R_SYM (rel->r_info);
4090 if (r_symndx < symtab_hdr->sh_info)
4091 h = NULL;
4092 else
4093 {
4094 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4095 while (h->root.type == bfd_link_hash_indirect
4096 || h->root.type == bfd_link_hash_warning)
4097 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4098 }
4099
4100 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4101 This shows up in particular in an R_PPC_ADDR32 in the eabi
4102 startup code. */
4103 if (h != NULL
4104 && htab->elf.sgot == NULL
4105 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4106 {
4107 if (htab->elf.dynobj == NULL)
4108 htab->elf.dynobj = abfd;
4109 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4110 return FALSE;
4111 BFD_ASSERT (h == htab->elf.hgot);
4112 }
4113
4114 tls_type = 0;
4115 r_type = ELF32_R_TYPE (rel->r_info);
4116 ifunc = NULL;
4117 if (h == NULL && !htab->is_vxworks)
4118 {
4119 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4120 abfd, r_symndx);
4121 if (isym == NULL)
4122 return FALSE;
4123
4124 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4125 {
4126 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4127 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4128 NON_GOT | PLT_IFUNC);
4129 if (ifunc == NULL)
4130 return FALSE;
4131
4132 /* STT_GNU_IFUNC symbols must have a PLT entry;
4133 In a non-pie executable even when there are
4134 no plt calls. */
4135 if (!bfd_link_pic (info)
4136 || is_branch_reloc (r_type)
4137 || r_type == R_PPC_PLT16_LO
4138 || r_type == R_PPC_PLT16_HI
4139 || r_type == R_PPC_PLT16_HA)
4140 {
4141 addend = 0;
4142 if (r_type == R_PPC_PLTREL24)
4143 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4144 if (bfd_link_pic (info)
4145 && (r_type == R_PPC_PLTREL24
4146 || r_type == R_PPC_PLT16_LO
4147 || r_type == R_PPC_PLT16_HI
4148 || r_type == R_PPC_PLT16_HA))
4149 addend = rel->r_addend;
4150 if (!update_plt_info (abfd, ifunc, got2, addend))
4151 return FALSE;
4152 }
4153 }
4154 }
4155
4156 if (!htab->is_vxworks
4157 && is_branch_reloc (r_type)
4158 && h != NULL
4159 && h == tga)
4160 {
4161 if (rel != relocs
4162 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4163 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4164 /* We have a new-style __tls_get_addr call with a marker
4165 reloc. */
4166 ;
4167 else
4168 /* Mark this section as having an old-style call. */
4169 sec->has_tls_get_addr_call = 1;
4170 }
4171
4172 switch (r_type)
4173 {
4174 case R_PPC_TLSGD:
4175 case R_PPC_TLSLD:
4176 /* These special tls relocs tie a call to __tls_get_addr with
4177 its parameter symbol. */
4178 if (h != NULL)
4179 ppc_elf_hash_entry (h)->tls_mask |= TLS_TLS | TLS_MARK;
4180 else
4181 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx,
4182 NON_GOT | TLS_TLS | TLS_MARK))
4183 return FALSE;
4184 break;
4185
4186 case R_PPC_PLTSEQ:
4187 break;
4188
4189 case R_PPC_GOT_TLSLD16:
4190 case R_PPC_GOT_TLSLD16_LO:
4191 case R_PPC_GOT_TLSLD16_HI:
4192 case R_PPC_GOT_TLSLD16_HA:
4193 tls_type = TLS_TLS | TLS_LD;
4194 goto dogottls;
4195
4196 case R_PPC_GOT_TLSGD16:
4197 case R_PPC_GOT_TLSGD16_LO:
4198 case R_PPC_GOT_TLSGD16_HI:
4199 case R_PPC_GOT_TLSGD16_HA:
4200 tls_type = TLS_TLS | TLS_GD;
4201 goto dogottls;
4202
4203 case R_PPC_GOT_TPREL16:
4204 case R_PPC_GOT_TPREL16_LO:
4205 case R_PPC_GOT_TPREL16_HI:
4206 case R_PPC_GOT_TPREL16_HA:
4207 if (bfd_link_dll (info))
4208 info->flags |= DF_STATIC_TLS;
4209 tls_type = TLS_TLS | TLS_TPREL;
4210 goto dogottls;
4211
4212 case R_PPC_GOT_DTPREL16:
4213 case R_PPC_GOT_DTPREL16_LO:
4214 case R_PPC_GOT_DTPREL16_HI:
4215 case R_PPC_GOT_DTPREL16_HA:
4216 tls_type = TLS_TLS | TLS_DTPREL;
4217 dogottls:
4218 sec->has_tls_reloc = 1;
4219 /* Fall through. */
4220
4221 /* GOT16 relocations */
4222 case R_PPC_GOT16:
4223 case R_PPC_GOT16_LO:
4224 case R_PPC_GOT16_HI:
4225 case R_PPC_GOT16_HA:
4226 /* This symbol requires a global offset table entry. */
4227 if (htab->elf.sgot == NULL)
4228 {
4229 if (htab->elf.dynobj == NULL)
4230 htab->elf.dynobj = abfd;
4231 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4232 return FALSE;
4233 }
4234 if (h != NULL)
4235 {
4236 h->got.refcount += 1;
4237 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4238 }
4239 else
4240 /* This is a global offset table entry for a local symbol. */
4241 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4242 return FALSE;
4243
4244 /* We may also need a plt entry if the symbol turns out to be
4245 an ifunc. */
4246 if (h != NULL && !bfd_link_pic (info))
4247 {
4248 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4249 return FALSE;
4250 }
4251 break;
4252
4253 /* Indirect .sdata relocation. */
4254 case R_PPC_EMB_SDAI16:
4255 if (bfd_link_pic (info))
4256 {
4257 bad_shared_reloc (abfd, r_type);
4258 return FALSE;
4259 }
4260 htab->sdata[0].sym->ref_regular = 1;
4261 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4262 h, rel))
4263 return FALSE;
4264 if (h != NULL)
4265 {
4266 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4267 h->non_got_ref = TRUE;
4268 }
4269 break;
4270
4271 /* Indirect .sdata2 relocation. */
4272 case R_PPC_EMB_SDA2I16:
4273 if (bfd_link_pic (info))
4274 {
4275 bad_shared_reloc (abfd, r_type);
4276 return FALSE;
4277 }
4278 htab->sdata[1].sym->ref_regular = 1;
4279 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4280 h, rel))
4281 return FALSE;
4282 if (h != NULL)
4283 {
4284 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4285 h->non_got_ref = TRUE;
4286 }
4287 break;
4288
4289 case R_PPC_SDAREL16:
4290 htab->sdata[0].sym->ref_regular = 1;
4291 /* Fall through. */
4292
4293 case R_PPC_VLE_SDAREL_LO16A:
4294 case R_PPC_VLE_SDAREL_LO16D:
4295 case R_PPC_VLE_SDAREL_HI16A:
4296 case R_PPC_VLE_SDAREL_HI16D:
4297 case R_PPC_VLE_SDAREL_HA16A:
4298 case R_PPC_VLE_SDAREL_HA16D:
4299 if (h != NULL)
4300 {
4301 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4302 h->non_got_ref = TRUE;
4303 }
4304 break;
4305
4306 case R_PPC_VLE_REL8:
4307 case R_PPC_VLE_REL15:
4308 case R_PPC_VLE_REL24:
4309 case R_PPC_VLE_LO16A:
4310 case R_PPC_VLE_LO16D:
4311 case R_PPC_VLE_HI16A:
4312 case R_PPC_VLE_HI16D:
4313 case R_PPC_VLE_HA16A:
4314 case R_PPC_VLE_HA16D:
4315 case R_PPC_VLE_ADDR20:
4316 break;
4317
4318 case R_PPC_EMB_SDA2REL:
4319 if (bfd_link_pic (info))
4320 {
4321 bad_shared_reloc (abfd, r_type);
4322 return FALSE;
4323 }
4324 htab->sdata[1].sym->ref_regular = 1;
4325 if (h != NULL)
4326 {
4327 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4328 h->non_got_ref = TRUE;
4329 }
4330 break;
4331
4332 case R_PPC_VLE_SDA21_LO:
4333 case R_PPC_VLE_SDA21:
4334 case R_PPC_EMB_SDA21:
4335 case R_PPC_EMB_RELSDA:
4336 if (bfd_link_pic (info))
4337 {
4338 bad_shared_reloc (abfd, r_type);
4339 return FALSE;
4340 }
4341 if (h != NULL)
4342 {
4343 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4344 h->non_got_ref = TRUE;
4345 }
4346 break;
4347
4348 case R_PPC_EMB_NADDR32:
4349 case R_PPC_EMB_NADDR16:
4350 case R_PPC_EMB_NADDR16_LO:
4351 case R_PPC_EMB_NADDR16_HI:
4352 case R_PPC_EMB_NADDR16_HA:
4353 if (bfd_link_pic (info))
4354 {
4355 bad_shared_reloc (abfd, r_type);
4356 return FALSE;
4357 }
4358 if (h != NULL)
4359 h->non_got_ref = TRUE;
4360 break;
4361
4362 case R_PPC_PLTREL24:
4363 if (h == NULL)
4364 break;
4365 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4366 goto pltentry;
4367
4368 case R_PPC_PLTCALL:
4369 sec->has_pltcall = 1;
4370 /* Fall through. */
4371
4372 case R_PPC_PLT32:
4373 case R_PPC_PLTREL32:
4374 case R_PPC_PLT16_LO:
4375 case R_PPC_PLT16_HI:
4376 case R_PPC_PLT16_HA:
4377 pltentry:
4378 #ifdef DEBUG
4379 fprintf (stderr, "Reloc requires a PLT entry\n");
4380 #endif
4381 /* This symbol requires a procedure linkage table entry. */
4382 if (h == NULL)
4383 {
4384 pltent = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4385 NON_GOT | PLT_KEEP);
4386 if (pltent == NULL)
4387 return FALSE;
4388 }
4389 else
4390 {
4391 if (r_type != R_PPC_PLTREL24)
4392 ppc_elf_hash_entry (h)->tls_mask |= PLT_KEEP;
4393 h->needs_plt = 1;
4394 pltent = &h->plt.plist;
4395 }
4396 addend = 0;
4397 if (bfd_link_pic (info)
4398 && (r_type == R_PPC_PLTREL24
4399 || r_type == R_PPC_PLT16_LO
4400 || r_type == R_PPC_PLT16_HI
4401 || r_type == R_PPC_PLT16_HA))
4402 addend = rel->r_addend;
4403 if (!update_plt_info (abfd, pltent, got2, addend))
4404 return FALSE;
4405 break;
4406
4407 /* The following relocations don't need to propagate the
4408 relocation if linking a shared object since they are
4409 section relative. */
4410 case R_PPC_SECTOFF:
4411 case R_PPC_SECTOFF_LO:
4412 case R_PPC_SECTOFF_HI:
4413 case R_PPC_SECTOFF_HA:
4414 case R_PPC_DTPREL16:
4415 case R_PPC_DTPREL16_LO:
4416 case R_PPC_DTPREL16_HI:
4417 case R_PPC_DTPREL16_HA:
4418 case R_PPC_TOC16:
4419 break;
4420
4421 case R_PPC_REL16:
4422 case R_PPC_REL16_LO:
4423 case R_PPC_REL16_HI:
4424 case R_PPC_REL16_HA:
4425 case R_PPC_REL16DX_HA:
4426 ppc_elf_tdata (abfd)->has_rel16 = 1;
4427 break;
4428
4429 /* These are just markers. */
4430 case R_PPC_TLS:
4431 case R_PPC_EMB_MRKREF:
4432 case R_PPC_NONE:
4433 case R_PPC_max:
4434 case R_PPC_RELAX:
4435 case R_PPC_RELAX_PLT:
4436 case R_PPC_RELAX_PLTREL24:
4437 case R_PPC_16DX_HA:
4438 break;
4439
4440 /* These should only appear in dynamic objects. */
4441 case R_PPC_COPY:
4442 case R_PPC_GLOB_DAT:
4443 case R_PPC_JMP_SLOT:
4444 case R_PPC_RELATIVE:
4445 case R_PPC_IRELATIVE:
4446 break;
4447
4448 /* These aren't handled yet. We'll report an error later. */
4449 case R_PPC_ADDR30:
4450 case R_PPC_EMB_RELSEC16:
4451 case R_PPC_EMB_RELST_LO:
4452 case R_PPC_EMB_RELST_HI:
4453 case R_PPC_EMB_RELST_HA:
4454 case R_PPC_EMB_BIT_FLD:
4455 break;
4456
4457 /* This refers only to functions defined in the shared library. */
4458 case R_PPC_LOCAL24PC:
4459 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4460 {
4461 htab->plt_type = PLT_OLD;
4462 htab->old_bfd = abfd;
4463 }
4464 if (h != NULL && h->type == STT_GNU_IFUNC)
4465 {
4466 h->needs_plt = 1;
4467 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4468 return FALSE;
4469 }
4470 break;
4471
4472 /* This relocation describes the C++ object vtable hierarchy.
4473 Reconstruct it for later use during GC. */
4474 case R_PPC_GNU_VTINHERIT:
4475 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4476 return FALSE;
4477 break;
4478
4479 /* This relocation describes which C++ vtable entries are actually
4480 used. Record for later use during GC. */
4481 case R_PPC_GNU_VTENTRY:
4482 BFD_ASSERT (h != NULL);
4483 if (h != NULL
4484 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4485 return FALSE;
4486 break;
4487
4488 /* We shouldn't really be seeing TPREL32. */
4489 case R_PPC_TPREL32:
4490 case R_PPC_TPREL16:
4491 case R_PPC_TPREL16_LO:
4492 case R_PPC_TPREL16_HI:
4493 case R_PPC_TPREL16_HA:
4494 if (bfd_link_dll (info))
4495 info->flags |= DF_STATIC_TLS;
4496 goto dodyn;
4497
4498 /* Nor these. */
4499 case R_PPC_DTPMOD32:
4500 case R_PPC_DTPREL32:
4501 goto dodyn;
4502
4503 case R_PPC_REL32:
4504 if (h == NULL
4505 && got2 != NULL
4506 && (sec->flags & SEC_CODE) != 0
4507 && bfd_link_pic (info)
4508 && htab->plt_type == PLT_UNSET)
4509 {
4510 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4511 the start of a function, which assembles to a REL32
4512 reference to .got2. If we detect one of these, then
4513 force the old PLT layout because the linker cannot
4514 reliably deduce the GOT pointer value needed for
4515 PLT call stubs. */
4516 asection *s;
4517 Elf_Internal_Sym *isym;
4518
4519 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4520 abfd, r_symndx);
4521 if (isym == NULL)
4522 return FALSE;
4523
4524 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4525 if (s == got2)
4526 {
4527 htab->plt_type = PLT_OLD;
4528 htab->old_bfd = abfd;
4529 }
4530 }
4531 if (h == NULL || h == htab->elf.hgot)
4532 break;
4533 /* fall through */
4534
4535 case R_PPC_ADDR32:
4536 case R_PPC_ADDR16:
4537 case R_PPC_ADDR16_LO:
4538 case R_PPC_ADDR16_HI:
4539 case R_PPC_ADDR16_HA:
4540 case R_PPC_UADDR32:
4541 case R_PPC_UADDR16:
4542 if (h != NULL && !bfd_link_pic (info))
4543 {
4544 /* We may need a plt entry if the symbol turns out to be
4545 a function defined in a dynamic object. */
4546 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4547 return FALSE;
4548
4549 /* We may need a copy reloc too. */
4550 h->non_got_ref = 1;
4551 h->pointer_equality_needed = 1;
4552 if (r_type == R_PPC_ADDR16_HA)
4553 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4554 if (r_type == R_PPC_ADDR16_LO)
4555 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4556 }
4557 goto dodyn;
4558
4559 case R_PPC_REL24:
4560 case R_PPC_REL14:
4561 case R_PPC_REL14_BRTAKEN:
4562 case R_PPC_REL14_BRNTAKEN:
4563 if (h == NULL)
4564 break;
4565 if (h == htab->elf.hgot)
4566 {
4567 if (htab->plt_type == PLT_UNSET)
4568 {
4569 htab->plt_type = PLT_OLD;
4570 htab->old_bfd = abfd;
4571 }
4572 break;
4573 }
4574 /* fall through */
4575
4576 case R_PPC_ADDR24:
4577 case R_PPC_ADDR14:
4578 case R_PPC_ADDR14_BRTAKEN:
4579 case R_PPC_ADDR14_BRNTAKEN:
4580 if (h != NULL && !bfd_link_pic (info))
4581 {
4582 /* We may need a plt entry if the symbol turns out to be
4583 a function defined in a dynamic object. */
4584 h->needs_plt = 1;
4585 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4586 return FALSE;
4587 break;
4588 }
4589
4590 dodyn:
4591 /* If we are creating a shared library, and this is a reloc
4592 against a global symbol, or a non PC relative reloc
4593 against a local symbol, then we need to copy the reloc
4594 into the shared library. However, if we are linking with
4595 -Bsymbolic, we do not need to copy a reloc against a
4596 global symbol which is defined in an object we are
4597 including in the link (i.e., DEF_REGULAR is set). At
4598 this point we have not seen all the input files, so it is
4599 possible that DEF_REGULAR is not set now but will be set
4600 later (it is never cleared). In case of a weak definition,
4601 DEF_REGULAR may be cleared later by a strong definition in
4602 a shared library. We account for that possibility below by
4603 storing information in the dyn_relocs field of the hash
4604 table entry. A similar situation occurs when creating
4605 shared libraries and symbol visibility changes render the
4606 symbol local.
4607
4608 If on the other hand, we are creating an executable, we
4609 may need to keep relocations for symbols satisfied by a
4610 dynamic library if we manage to avoid copy relocs for the
4611 symbol. */
4612 if ((bfd_link_pic (info)
4613 && (must_be_dyn_reloc (info, r_type)
4614 || (h != NULL
4615 && (!SYMBOLIC_BIND (info, h)
4616 || h->root.type == bfd_link_hash_defweak
4617 || !h->def_regular))))
4618 || (ELIMINATE_COPY_RELOCS
4619 && !bfd_link_pic (info)
4620 && h != NULL
4621 && (h->root.type == bfd_link_hash_defweak
4622 || !h->def_regular)))
4623 {
4624 #ifdef DEBUG
4625 fprintf (stderr,
4626 "ppc_elf_check_relocs needs to "
4627 "create relocation for %s\n",
4628 (h && h->root.root.string
4629 ? h->root.root.string : "<unknown>"));
4630 #endif
4631 if (sreloc == NULL)
4632 {
4633 if (htab->elf.dynobj == NULL)
4634 htab->elf.dynobj = abfd;
4635
4636 sreloc = _bfd_elf_make_dynamic_reloc_section
4637 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4638
4639 if (sreloc == NULL)
4640 return FALSE;
4641 }
4642
4643 /* If this is a global symbol, we count the number of
4644 relocations we need for this symbol. */
4645 if (h != NULL)
4646 {
4647 struct elf_dyn_relocs *p;
4648 struct elf_dyn_relocs **rel_head;
4649
4650 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4651 p = *rel_head;
4652 if (p == NULL || p->sec != sec)
4653 {
4654 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4655 if (p == NULL)
4656 return FALSE;
4657 p->next = *rel_head;
4658 *rel_head = p;
4659 p->sec = sec;
4660 p->count = 0;
4661 p->pc_count = 0;
4662 }
4663 p->count += 1;
4664 if (!must_be_dyn_reloc (info, r_type))
4665 p->pc_count += 1;
4666 }
4667 else
4668 {
4669 /* Track dynamic relocs needed for local syms too.
4670 We really need local syms available to do this
4671 easily. Oh well. */
4672 struct ppc_dyn_relocs *p;
4673 struct ppc_dyn_relocs **rel_head;
4674 bfd_boolean is_ifunc;
4675 asection *s;
4676 void *vpp;
4677 Elf_Internal_Sym *isym;
4678
4679 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4680 abfd, r_symndx);
4681 if (isym == NULL)
4682 return FALSE;
4683
4684 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4685 if (s == NULL)
4686 s = sec;
4687
4688 vpp = &elf_section_data (s)->local_dynrel;
4689 rel_head = (struct ppc_dyn_relocs **) vpp;
4690 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4691 p = *rel_head;
4692 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4693 p = p->next;
4694 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4695 {
4696 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4697 if (p == NULL)
4698 return FALSE;
4699 p->next = *rel_head;
4700 *rel_head = p;
4701 p->sec = sec;
4702 p->ifunc = is_ifunc;
4703 p->count = 0;
4704 }
4705 p->count += 1;
4706 }
4707 }
4708
4709 break;
4710 }
4711 }
4712
4713 return TRUE;
4714 }
4715 \f
4716 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4717 and OBFD, and merge non-conflicting ones. */
4718 bfd_boolean
4719 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4720 {
4721 bfd *obfd = info->output_bfd;
4722 obj_attribute *in_attr, *in_attrs;
4723 obj_attribute *out_attr, *out_attrs;
4724 bfd_boolean ret = TRUE;
4725
4726 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4727 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4728
4729 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4730 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4731
4732 if (in_attr->i != out_attr->i)
4733 {
4734 int in_fp = in_attr->i & 3;
4735 int out_fp = out_attr->i & 3;
4736 static bfd *last_fp, *last_ld;
4737
4738 if (in_fp == 0)
4739 ;
4740 else if (out_fp == 0)
4741 {
4742 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4743 out_attr->i ^= in_fp;
4744 last_fp = ibfd;
4745 }
4746 else if (out_fp != 2 && in_fp == 2)
4747 {
4748 _bfd_error_handler
4749 /* xgettext:c-format */
4750 (_("%pB uses hard float, %pB uses soft float"),
4751 last_fp, ibfd);
4752 ret = FALSE;
4753 }
4754 else if (out_fp == 2 && in_fp != 2)
4755 {
4756 _bfd_error_handler
4757 /* xgettext:c-format */
4758 (_("%pB uses hard float, %pB uses soft float"),
4759 ibfd, last_fp);
4760 ret = FALSE;
4761 }
4762 else if (out_fp == 1 && in_fp == 3)
4763 {
4764 _bfd_error_handler
4765 /* xgettext:c-format */
4766 (_("%pB uses double-precision hard float, "
4767 "%pB uses single-precision hard float"), last_fp, ibfd);
4768 ret = FALSE;
4769 }
4770 else if (out_fp == 3 && in_fp == 1)
4771 {
4772 _bfd_error_handler
4773 /* xgettext:c-format */
4774 (_("%pB uses double-precision hard float, "
4775 "%pB uses single-precision hard float"), ibfd, last_fp);
4776 ret = FALSE;
4777 }
4778
4779 in_fp = in_attr->i & 0xc;
4780 out_fp = out_attr->i & 0xc;
4781 if (in_fp == 0)
4782 ;
4783 else if (out_fp == 0)
4784 {
4785 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4786 out_attr->i ^= in_fp;
4787 last_ld = ibfd;
4788 }
4789 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4790 {
4791 _bfd_error_handler
4792 /* xgettext:c-format */
4793 (_("%pB uses 64-bit long double, "
4794 "%pB uses 128-bit long double"), ibfd, last_ld);
4795 ret = FALSE;
4796 }
4797 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4798 {
4799 _bfd_error_handler
4800 /* xgettext:c-format */
4801 (_("%pB uses 64-bit long double, "
4802 "%pB uses 128-bit long double"), last_ld, ibfd);
4803 ret = FALSE;
4804 }
4805 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4806 {
4807 _bfd_error_handler
4808 /* xgettext:c-format */
4809 (_("%pB uses IBM long double, "
4810 "%pB uses IEEE long double"), last_ld, ibfd);
4811 ret = FALSE;
4812 }
4813 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4814 {
4815 _bfd_error_handler
4816 /* xgettext:c-format */
4817 (_("%pB uses IBM long double, "
4818 "%pB uses IEEE long double"), ibfd, last_ld);
4819 ret = FALSE;
4820 }
4821 }
4822
4823 if (!ret)
4824 {
4825 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4826 bfd_set_error (bfd_error_bad_value);
4827 }
4828 return ret;
4829 }
4830
4831 /* Merge object attributes from IBFD into OBFD. Warn if
4832 there are conflicting attributes. */
4833 static bfd_boolean
4834 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4835 {
4836 bfd *obfd;
4837 obj_attribute *in_attr, *in_attrs;
4838 obj_attribute *out_attr, *out_attrs;
4839 bfd_boolean ret;
4840
4841 if (!_bfd_elf_ppc_merge_fp_attributes (ibfd, info))
4842 return FALSE;
4843
4844 obfd = info->output_bfd;
4845 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4846 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4847
4848 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4849 merge non-conflicting ones. */
4850 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4851 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4852 ret = TRUE;
4853 if (in_attr->i != out_attr->i)
4854 {
4855 int in_vec = in_attr->i & 3;
4856 int out_vec = out_attr->i & 3;
4857 static bfd *last_vec;
4858
4859 if (in_vec == 0)
4860 ;
4861 else if (out_vec == 0)
4862 {
4863 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4864 out_attr->i = in_vec;
4865 last_vec = ibfd;
4866 }
4867 /* For now, allow generic to transition to AltiVec or SPE
4868 without a warning. If GCC marked files with their stack
4869 alignment and used don't-care markings for files which are
4870 not affected by the vector ABI, we could warn about this
4871 case too. */
4872 else if (in_vec == 1)
4873 ;
4874 else if (out_vec == 1)
4875 {
4876 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4877 out_attr->i = in_vec;
4878 last_vec = ibfd;
4879 }
4880 else if (out_vec < in_vec)
4881 {
4882 _bfd_error_handler
4883 /* xgettext:c-format */
4884 (_("%pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
4885 last_vec, ibfd);
4886 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4887 ret = FALSE;
4888 }
4889 else if (out_vec > in_vec)
4890 {
4891 _bfd_error_handler
4892 /* xgettext:c-format */
4893 (_("%pB uses AltiVec vector ABI, %pB uses SPE vector ABI"),
4894 ibfd, last_vec);
4895 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4896 ret = FALSE;
4897 }
4898 }
4899
4900 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4901 and merge non-conflicting ones. */
4902 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4903 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4904 if (in_attr->i != out_attr->i)
4905 {
4906 int in_struct = in_attr->i & 3;
4907 int out_struct = out_attr->i & 3;
4908 static bfd *last_struct;
4909
4910 if (in_struct == 0 || in_struct == 3)
4911 ;
4912 else if (out_struct == 0)
4913 {
4914 out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
4915 out_attr->i = in_struct;
4916 last_struct = ibfd;
4917 }
4918 else if (out_struct < in_struct)
4919 {
4920 _bfd_error_handler
4921 /* xgettext:c-format */
4922 (_("%pB uses r3/r4 for small structure returns, "
4923 "%pB uses memory"), last_struct, ibfd);
4924 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4925 ret = FALSE;
4926 }
4927 else if (out_struct > in_struct)
4928 {
4929 _bfd_error_handler
4930 /* xgettext:c-format */
4931 (_("%pB uses r3/r4 for small structure returns, "
4932 "%pB uses memory"), ibfd, last_struct);
4933 out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR;
4934 ret = FALSE;
4935 }
4936 }
4937 if (!ret)
4938 {
4939 bfd_set_error (bfd_error_bad_value);
4940 return FALSE;
4941 }
4942
4943 /* Merge Tag_compatibility attributes and any common GNU ones. */
4944 return _bfd_elf_merge_object_attributes (ibfd, info);
4945 }
4946
4947 /* Merge backend specific data from an object file to the output
4948 object file when linking. */
4949
4950 static bfd_boolean
4951 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4952 {
4953 bfd *obfd = info->output_bfd;
4954 flagword old_flags;
4955 flagword new_flags;
4956 bfd_boolean error;
4957
4958 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4959 return TRUE;
4960
4961 /* Check if we have the same endianness. */
4962 if (! _bfd_generic_verify_endian_match (ibfd, info))
4963 return FALSE;
4964
4965 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4966 return FALSE;
4967
4968 new_flags = elf_elfheader (ibfd)->e_flags;
4969 old_flags = elf_elfheader (obfd)->e_flags;
4970 if (!elf_flags_init (obfd))
4971 {
4972 /* First call, no flags set. */
4973 elf_flags_init (obfd) = TRUE;
4974 elf_elfheader (obfd)->e_flags = new_flags;
4975 }
4976
4977 /* Compatible flags are ok. */
4978 else if (new_flags == old_flags)
4979 ;
4980
4981 /* Incompatible flags. */
4982 else
4983 {
4984 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4985 to be linked with either. */
4986 error = FALSE;
4987 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4988 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4989 {
4990 error = TRUE;
4991 _bfd_error_handler
4992 (_("%pB: compiled with -mrelocatable and linked with "
4993 "modules compiled normally"), ibfd);
4994 }
4995 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4996 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4997 {
4998 error = TRUE;
4999 _bfd_error_handler
5000 (_("%pB: compiled normally and linked with "
5001 "modules compiled with -mrelocatable"), ibfd);
5002 }
5003
5004 /* The output is -mrelocatable-lib iff both the input files are. */
5005 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
5006 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
5007
5008 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
5009 but each input file is either -mrelocatable or -mrelocatable-lib. */
5010 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
5011 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
5012 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
5013 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
5014
5015 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
5016 any module uses it. */
5017 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
5018
5019 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
5020 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
5021
5022 /* Warn about any other mismatches. */
5023 if (new_flags != old_flags)
5024 {
5025 error = TRUE;
5026 _bfd_error_handler
5027 /* xgettext:c-format */
5028 (_("%pB: uses different e_flags (%#x) fields "
5029 "than previous modules (%#x)"),
5030 ibfd, new_flags, old_flags);
5031 }
5032
5033 if (error)
5034 {
5035 bfd_set_error (bfd_error_bad_value);
5036 return FALSE;
5037 }
5038 }
5039
5040 return TRUE;
5041 }
5042
5043 static void
5044 ppc_elf_vle_split16 (bfd *input_bfd,
5045 asection *input_section,
5046 unsigned long offset,
5047 bfd_byte *loc,
5048 bfd_vma value,
5049 split16_format_type split16_format,
5050 bfd_boolean fixup)
5051 {
5052 unsigned int insn, opcode, top5;
5053
5054 insn = bfd_get_32 (input_bfd, loc);
5055 opcode = insn & 0xfc00f800;
5056 if (opcode == E_OR2I_INSN
5057 || opcode == E_AND2I_DOT_INSN
5058 || opcode == E_OR2IS_INSN
5059 || opcode == E_LIS_INSN
5060 || opcode == E_AND2IS_DOT_INSN)
5061 {
5062 if (split16_format != split16a_type)
5063 {
5064 if (fixup)
5065 split16_format = split16a_type;
5066 else
5067 _bfd_error_handler
5068 /* xgettext:c-format */
5069 (_("%pB(%pA+0x%lx): expected 16A style relocation on 0x%08x insn"),
5070 input_bfd, input_section, offset, opcode);
5071 }
5072 }
5073 else if (opcode == E_ADD2I_DOT_INSN
5074 || opcode == E_ADD2IS_INSN
5075 || opcode == E_CMP16I_INSN
5076 || opcode == E_MULL2I_INSN
5077 || opcode == E_CMPL16I_INSN
5078 || opcode == E_CMPH16I_INSN
5079 || opcode == E_CMPHL16I_INSN)
5080 {
5081 if (split16_format != split16d_type)
5082 {
5083 if (fixup)
5084 split16_format = split16d_type;
5085 else
5086 _bfd_error_handler
5087 /* xgettext:c-format */
5088 (_("%pB(%pA+0x%lx): expected 16D style relocation on 0x%08x insn"),
5089 input_bfd, input_section, offset, opcode);
5090 }
5091 }
5092 top5 = value & 0xf800;
5093 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
5094 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
5095 insn |= top5;
5096 insn |= value & 0x7ff;
5097 bfd_put_32 (input_bfd, insn, loc);
5098 }
5099
5100 static void
5101 ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value)
5102 {
5103 unsigned int insn;
5104
5105 insn = bfd_get_32 (output_bfd, loc);
5106 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
5107 /* Top 4 bits of value to 17..20. */
5108 insn |= (value & 0xf0000) >> 5;
5109 /* Next 5 bits of the value to 11..15. */
5110 insn |= (value & 0xf800) << 5;
5111 /* And the final 11 bits of the value to bits 21 to 31. */
5112 insn |= value & 0x7ff;
5113 bfd_put_32 (output_bfd, insn, loc);
5114 }
5115
5116 \f
5117 /* Choose which PLT scheme to use, and set .plt flags appropriately.
5118 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
5119 int
5120 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
5121 struct bfd_link_info *info)
5122 {
5123 struct ppc_elf_link_hash_table *htab;
5124 flagword flags;
5125
5126 htab = ppc_elf_hash_table (info);
5127
5128 if (htab->plt_type == PLT_UNSET)
5129 {
5130 struct elf_link_hash_entry *h;
5131
5132 if (htab->params->plt_style == PLT_OLD)
5133 htab->plt_type = PLT_OLD;
5134 else if (bfd_link_pic (info)
5135 && htab->elf.dynamic_sections_created
5136 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
5137 FALSE, FALSE, TRUE)) != NULL
5138 && (h->type == STT_FUNC
5139 || h->needs_plt)
5140 && h->ref_regular
5141 && !(SYMBOL_CALLS_LOCAL (info, h)
5142 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5143 {
5144 /* Profiling of shared libs (and pies) is not supported with
5145 secure plt, because ppc32 does profiling before a
5146 function prologue and a secure plt pic call stubs needs
5147 r30 to be set up. */
5148 htab->plt_type = PLT_OLD;
5149 }
5150 else
5151 {
5152 bfd *ibfd;
5153 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
5154
5155 /* Look through the reloc flags left by ppc_elf_check_relocs.
5156 Use the old style bss plt if a file makes plt calls
5157 without using the new relocs, and if ld isn't given
5158 --secure-plt and we never see REL16 relocs. */
5159 if (plt_type == PLT_UNSET)
5160 plt_type = PLT_OLD;
5161 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
5162 if (is_ppc_elf (ibfd))
5163 {
5164 if (ppc_elf_tdata (ibfd)->has_rel16)
5165 plt_type = PLT_NEW;
5166 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5167 {
5168 plt_type = PLT_OLD;
5169 htab->old_bfd = ibfd;
5170 break;
5171 }
5172 }
5173 htab->plt_type = plt_type;
5174 }
5175 }
5176 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5177 {
5178 if (htab->old_bfd != NULL)
5179 _bfd_error_handler (_("bss-plt forced due to %pB"), htab->old_bfd);
5180 else
5181 _bfd_error_handler (_("bss-plt forced by profiling"));
5182 }
5183
5184 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5185
5186 if (htab->plt_type == PLT_NEW)
5187 {
5188 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5189 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5190
5191 /* The new PLT is a loaded section. */
5192 if (htab->elf.splt != NULL
5193 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5194 return -1;
5195
5196 /* The new GOT is not executable. */
5197 if (htab->elf.sgot != NULL
5198 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5199 return -1;
5200 }
5201 else
5202 {
5203 /* Stop an unused .glink section from affecting .text alignment. */
5204 if (htab->glink != NULL
5205 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5206 return -1;
5207 }
5208 return htab->plt_type == PLT_NEW;
5209 }
5210 \f
5211 /* Return the section that should be marked against GC for a given
5212 relocation. */
5213
5214 static asection *
5215 ppc_elf_gc_mark_hook (asection *sec,
5216 struct bfd_link_info *info,
5217 Elf_Internal_Rela *rel,
5218 struct elf_link_hash_entry *h,
5219 Elf_Internal_Sym *sym)
5220 {
5221 if (h != NULL)
5222 switch (ELF32_R_TYPE (rel->r_info))
5223 {
5224 case R_PPC_GNU_VTINHERIT:
5225 case R_PPC_GNU_VTENTRY:
5226 return NULL;
5227 }
5228
5229 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5230 }
5231
5232 static bfd_boolean
5233 get_sym_h (struct elf_link_hash_entry **hp,
5234 Elf_Internal_Sym **symp,
5235 asection **symsecp,
5236 unsigned char **tls_maskp,
5237 Elf_Internal_Sym **locsymsp,
5238 unsigned long r_symndx,
5239 bfd *ibfd)
5240 {
5241 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5242
5243 if (r_symndx >= symtab_hdr->sh_info)
5244 {
5245 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5246 struct elf_link_hash_entry *h;
5247
5248 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5249 while (h->root.type == bfd_link_hash_indirect
5250 || h->root.type == bfd_link_hash_warning)
5251 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5252
5253 if (hp != NULL)
5254 *hp = h;
5255
5256 if (symp != NULL)
5257 *symp = NULL;
5258
5259 if (symsecp != NULL)
5260 {
5261 asection *symsec = NULL;
5262 if (h->root.type == bfd_link_hash_defined
5263 || h->root.type == bfd_link_hash_defweak)
5264 symsec = h->root.u.def.section;
5265 *symsecp = symsec;
5266 }
5267
5268 if (tls_maskp != NULL)
5269 *tls_maskp = &ppc_elf_hash_entry (h)->tls_mask;
5270 }
5271 else
5272 {
5273 Elf_Internal_Sym *sym;
5274 Elf_Internal_Sym *locsyms = *locsymsp;
5275
5276 if (locsyms == NULL)
5277 {
5278 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5279 if (locsyms == NULL)
5280 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5281 symtab_hdr->sh_info,
5282 0, NULL, NULL, NULL);
5283 if (locsyms == NULL)
5284 return FALSE;
5285 *locsymsp = locsyms;
5286 }
5287 sym = locsyms + r_symndx;
5288
5289 if (hp != NULL)
5290 *hp = NULL;
5291
5292 if (symp != NULL)
5293 *symp = sym;
5294
5295 if (symsecp != NULL)
5296 *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
5297
5298 if (tls_maskp != NULL)
5299 {
5300 bfd_signed_vma *local_got;
5301 unsigned char *tls_mask;
5302
5303 tls_mask = NULL;
5304 local_got = elf_local_got_refcounts (ibfd);
5305 if (local_got != NULL)
5306 {
5307 struct plt_entry **local_plt = (struct plt_entry **)
5308 (local_got + symtab_hdr->sh_info);
5309 unsigned char *lgot_masks = (unsigned char *)
5310 (local_plt + symtab_hdr->sh_info);
5311 tls_mask = &lgot_masks[r_symndx];
5312 }
5313 *tls_maskp = tls_mask;
5314 }
5315 }
5316 return TRUE;
5317 }
5318 \f
5319 /* Analyze inline PLT call relocations to see whether calls to locally
5320 defined functions can be converted to direct calls. */
5321
5322 bfd_boolean
5323 ppc_elf_inline_plt (struct bfd_link_info *info)
5324 {
5325 struct ppc_elf_link_hash_table *htab;
5326 bfd *ibfd;
5327 asection *sec;
5328 bfd_vma low_vma, high_vma, limit;
5329
5330 htab = ppc_elf_hash_table (info);
5331 if (htab == NULL)
5332 return FALSE;
5333
5334 /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is
5335 reduced somewhat to cater for possible stubs that might be added
5336 between the call and its destination. */
5337 limit = 0x1e00000;
5338 low_vma = -1;
5339 high_vma = 0;
5340 for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next)
5341 if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE))
5342 {
5343 if (low_vma > sec->vma)
5344 low_vma = sec->vma;
5345 if (high_vma < sec->vma + sec->size)
5346 high_vma = sec->vma + sec->size;
5347 }
5348
5349 /* If a "bl" can reach anywhere in local code sections, then we can
5350 convert all inline PLT sequences to direct calls when the symbol
5351 is local. */
5352 if (high_vma - low_vma < limit)
5353 {
5354 htab->can_convert_all_inline_plt = 1;
5355 return TRUE;
5356 }
5357
5358 /* Otherwise, go looking through relocs for cases where a direct
5359 call won't reach. Mark the symbol on any such reloc to disable
5360 the optimization and keep the PLT entry as it seems likely that
5361 this will be better than creating trampolines. Note that this
5362 will disable the optimization for all inline PLT calls to a
5363 particular symbol, not just those that won't reach. The
5364 difficulty in doing a more precise optimization is that the
5365 linker needs to make a decision depending on whether a
5366 particular R_PPC_PLTCALL insn can be turned into a direct
5367 call, for each of the R_PPC_PLTSEQ and R_PPC_PLT16* insns in
5368 the sequence, and there is nothing that ties those relocs
5369 together except their symbol. */
5370
5371 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5372 {
5373 Elf_Internal_Shdr *symtab_hdr;
5374 Elf_Internal_Sym *local_syms;
5375
5376 if (!is_ppc_elf (ibfd))
5377 continue;
5378
5379 local_syms = NULL;
5380 symtab_hdr = &elf_symtab_hdr (ibfd);
5381
5382 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5383 if (sec->has_pltcall
5384 && !bfd_is_abs_section (sec->output_section))
5385 {
5386 Elf_Internal_Rela *relstart, *rel, *relend;
5387
5388 /* Read the relocations. */
5389 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5390 info->keep_memory);
5391 if (relstart == NULL)
5392 return FALSE;
5393
5394 relend = relstart + sec->reloc_count;
5395 for (rel = relstart; rel < relend; )
5396 {
5397 enum elf_ppc_reloc_type r_type;
5398 unsigned long r_symndx;
5399 asection *sym_sec;
5400 struct elf_link_hash_entry *h;
5401 Elf_Internal_Sym *sym;
5402 unsigned char *tls_maskp;
5403
5404 r_type = ELF32_R_TYPE (rel->r_info);
5405 if (r_type != R_PPC_PLTCALL)
5406 continue;
5407
5408 r_symndx = ELF32_R_SYM (rel->r_info);
5409 if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms,
5410 r_symndx, ibfd))
5411 {
5412 if (elf_section_data (sec)->relocs != relstart)
5413 free (relstart);
5414 if (local_syms != NULL
5415 && symtab_hdr->contents != (unsigned char *) local_syms)
5416 free (local_syms);
5417 return FALSE;
5418 }
5419
5420 if (sym_sec != NULL && sym_sec->output_section != NULL)
5421 {
5422 bfd_vma from, to;
5423 if (h != NULL)
5424 to = h->root.u.def.value;
5425 else
5426 to = sym->st_value;
5427 to += (rel->r_addend
5428 + sym_sec->output_offset
5429 + sym_sec->output_section->vma);
5430 from = (rel->r_offset
5431 + sec->output_offset
5432 + sec->output_section->vma);
5433 if (to - from + limit < 2 * limit)
5434 *tls_maskp &= ~PLT_KEEP;
5435 }
5436 }
5437 if (elf_section_data (sec)->relocs != relstart)
5438 free (relstart);
5439 }
5440
5441 if (local_syms != NULL
5442 && symtab_hdr->contents != (unsigned char *) local_syms)
5443 {
5444 if (!info->keep_memory)
5445 free (local_syms);
5446 else
5447 symtab_hdr->contents = (unsigned char *) local_syms;
5448 }
5449 }
5450
5451 return TRUE;
5452 }
5453
5454 /* Set plt output section type, htab->tls_get_addr, and call the
5455 generic ELF tls_setup function. */
5456
5457 asection *
5458 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5459 {
5460 struct ppc_elf_link_hash_table *htab;
5461
5462 htab = ppc_elf_hash_table (info);
5463 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5464 FALSE, FALSE, TRUE);
5465 if (htab->plt_type != PLT_NEW)
5466 htab->params->no_tls_get_addr_opt = TRUE;
5467
5468 if (!htab->params->no_tls_get_addr_opt)
5469 {
5470 struct elf_link_hash_entry *opt, *tga;
5471 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5472 FALSE, FALSE, TRUE);
5473 if (opt != NULL
5474 && (opt->root.type == bfd_link_hash_defined
5475 || opt->root.type == bfd_link_hash_defweak))
5476 {
5477 /* If glibc supports an optimized __tls_get_addr call stub,
5478 signalled by the presence of __tls_get_addr_opt, and we'll
5479 be calling __tls_get_addr via a plt call stub, then
5480 make __tls_get_addr point to __tls_get_addr_opt. */
5481 tga = htab->tls_get_addr;
5482 if (htab->elf.dynamic_sections_created
5483 && tga != NULL
5484 && (tga->type == STT_FUNC
5485 || tga->needs_plt)
5486 && !(SYMBOL_CALLS_LOCAL (info, tga)
5487 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5488 {
5489 struct plt_entry *ent;
5490 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5491 if (ent->plt.refcount > 0)
5492 break;
5493 if (ent != NULL)
5494 {
5495 tga->root.type = bfd_link_hash_indirect;
5496 tga->root.u.i.link = &opt->root;
5497 ppc_elf_copy_indirect_symbol (info, opt, tga);
5498 opt->mark = 1;
5499 if (opt->dynindx != -1)
5500 {
5501 /* Use __tls_get_addr_opt in dynamic relocations. */
5502 opt->dynindx = -1;
5503 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5504 opt->dynstr_index);
5505 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5506 return FALSE;
5507 }
5508 htab->tls_get_addr = opt;
5509 }
5510 }
5511 }
5512 else
5513 htab->params->no_tls_get_addr_opt = TRUE;
5514 }
5515 if (htab->plt_type == PLT_NEW
5516 && htab->elf.splt != NULL
5517 && htab->elf.splt->output_section != NULL)
5518 {
5519 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5520 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5521 }
5522
5523 return _bfd_elf_tls_setup (obfd, info);
5524 }
5525
5526 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5527 HASH. */
5528
5529 static bfd_boolean
5530 branch_reloc_hash_match (const bfd *ibfd,
5531 const Elf_Internal_Rela *rel,
5532 const struct elf_link_hash_entry *hash)
5533 {
5534 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5535 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5536 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5537
5538 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5539 {
5540 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5541 struct elf_link_hash_entry *h;
5542
5543 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5544 while (h->root.type == bfd_link_hash_indirect
5545 || h->root.type == bfd_link_hash_warning)
5546 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5547 if (h == hash)
5548 return TRUE;
5549 }
5550 return FALSE;
5551 }
5552
5553 /* Run through all the TLS relocs looking for optimization
5554 opportunities. */
5555
5556 bfd_boolean
5557 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5558 struct bfd_link_info *info)
5559 {
5560 bfd *ibfd;
5561 asection *sec;
5562 struct ppc_elf_link_hash_table *htab;
5563 int pass;
5564
5565 if (!bfd_link_executable (info))
5566 return TRUE;
5567
5568 htab = ppc_elf_hash_table (info);
5569 if (htab == NULL)
5570 return FALSE;
5571
5572 /* Make two passes through the relocs. First time check that tls
5573 relocs involved in setting up a tls_get_addr call are indeed
5574 followed by such a call. If they are not, don't do any tls
5575 optimization. On the second pass twiddle tls_mask flags to
5576 notify relocate_section that optimization can be done, and
5577 adjust got and plt refcounts. */
5578 for (pass = 0; pass < 2; ++pass)
5579 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5580 {
5581 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5582 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5583
5584 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5585 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5586 {
5587 Elf_Internal_Rela *relstart, *rel, *relend;
5588 int expecting_tls_get_addr = 0;
5589
5590 /* Read the relocations. */
5591 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5592 info->keep_memory);
5593 if (relstart == NULL)
5594 return FALSE;
5595
5596 relend = relstart + sec->reloc_count;
5597 for (rel = relstart; rel < relend; rel++)
5598 {
5599 enum elf_ppc_reloc_type r_type;
5600 unsigned long r_symndx;
5601 struct elf_link_hash_entry *h = NULL;
5602 unsigned char *tls_mask;
5603 unsigned char tls_set, tls_clear;
5604 bfd_boolean is_local;
5605 bfd_signed_vma *got_count;
5606
5607 r_symndx = ELF32_R_SYM (rel->r_info);
5608 if (r_symndx >= symtab_hdr->sh_info)
5609 {
5610 struct elf_link_hash_entry **sym_hashes;
5611
5612 sym_hashes = elf_sym_hashes (ibfd);
5613 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5614 while (h->root.type == bfd_link_hash_indirect
5615 || h->root.type == bfd_link_hash_warning)
5616 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5617 }
5618
5619 is_local = FALSE;
5620 if (h == NULL
5621 || !h->def_dynamic)
5622 is_local = TRUE;
5623
5624 r_type = ELF32_R_TYPE (rel->r_info);
5625 /* If this section has old-style __tls_get_addr calls
5626 without marker relocs, then check that each
5627 __tls_get_addr call reloc is preceded by a reloc
5628 that conceivably belongs to the __tls_get_addr arg
5629 setup insn. If we don't find matching arg setup
5630 relocs, don't do any tls optimization. */
5631 if (pass == 0
5632 && sec->has_tls_get_addr_call
5633 && h != NULL
5634 && h == htab->tls_get_addr
5635 && !expecting_tls_get_addr
5636 && is_branch_reloc (r_type))
5637 {
5638 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5639 "TLS optimization disabled\n",
5640 ibfd, sec, rel->r_offset);
5641 if (elf_section_data (sec)->relocs != relstart)
5642 free (relstart);
5643 return TRUE;
5644 }
5645
5646 expecting_tls_get_addr = 0;
5647 switch (r_type)
5648 {
5649 case R_PPC_GOT_TLSLD16:
5650 case R_PPC_GOT_TLSLD16_LO:
5651 expecting_tls_get_addr = 1;
5652 /* Fall through. */
5653
5654 case R_PPC_GOT_TLSLD16_HI:
5655 case R_PPC_GOT_TLSLD16_HA:
5656 /* These relocs should never be against a symbol
5657 defined in a shared lib. Leave them alone if
5658 that turns out to be the case. */
5659 if (!is_local)
5660 continue;
5661
5662 /* LD -> LE */
5663 tls_set = 0;
5664 tls_clear = TLS_LD;
5665 break;
5666
5667 case R_PPC_GOT_TLSGD16:
5668 case R_PPC_GOT_TLSGD16_LO:
5669 expecting_tls_get_addr = 1;
5670 /* Fall through. */
5671
5672 case R_PPC_GOT_TLSGD16_HI:
5673 case R_PPC_GOT_TLSGD16_HA:
5674 if (is_local)
5675 /* GD -> LE */
5676 tls_set = 0;
5677 else
5678 /* GD -> IE */
5679 tls_set = TLS_TLS | TLS_TPRELGD;
5680 tls_clear = TLS_GD;
5681 break;
5682
5683 case R_PPC_GOT_TPREL16:
5684 case R_PPC_GOT_TPREL16_LO:
5685 case R_PPC_GOT_TPREL16_HI:
5686 case R_PPC_GOT_TPREL16_HA:
5687 if (is_local)
5688 {
5689 /* IE -> LE */
5690 tls_set = 0;
5691 tls_clear = TLS_TPREL;
5692 break;
5693 }
5694 else
5695 continue;
5696
5697 case R_PPC_TLSGD:
5698 case R_PPC_TLSLD:
5699 if (rel + 1 < relend
5700 && is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
5701 {
5702 if (pass != 0
5703 && ELF32_R_TYPE (rel[1].r_info) != R_PPC_PLTSEQ)
5704 {
5705 r_type = ELF32_R_TYPE (rel[1].r_info);
5706 r_symndx = ELF32_R_SYM (rel[1].r_info);
5707 if (r_symndx >= symtab_hdr->sh_info)
5708 {
5709 struct elf_link_hash_entry **sym_hashes;
5710
5711 sym_hashes = elf_sym_hashes (ibfd);
5712 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5713 while (h->root.type == bfd_link_hash_indirect
5714 || h->root.type == bfd_link_hash_warning)
5715 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5716 if (h != NULL)
5717 {
5718 struct plt_entry *ent = NULL;
5719 bfd_vma addend = 0;
5720
5721 if (bfd_link_pic (info))
5722 addend = rel->r_addend;
5723 ent = find_plt_ent (&h->plt.plist,
5724 got2, addend);
5725 if (ent != NULL
5726 && ent->plt.refcount > 0)
5727 ent->plt.refcount -= 1;
5728 }
5729 }
5730 }
5731 continue;
5732 }
5733 expecting_tls_get_addr = 2;
5734 tls_set = 0;
5735 tls_clear = 0;
5736 break;
5737
5738 default:
5739 continue;
5740 }
5741
5742 if (pass == 0)
5743 {
5744 if (!expecting_tls_get_addr
5745 || !sec->has_tls_get_addr_call)
5746 continue;
5747
5748 if (rel + 1 < relend
5749 && branch_reloc_hash_match (ibfd, rel + 1,
5750 htab->tls_get_addr))
5751 continue;
5752
5753 /* Uh oh, we didn't find the expected call. We
5754 could just mark this symbol to exclude it
5755 from tls optimization but it's safer to skip
5756 the entire optimization. */
5757 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5758 "TLS optimization disabled\n"),
5759 ibfd, sec, rel->r_offset);
5760 if (elf_section_data (sec)->relocs != relstart)
5761 free (relstart);
5762 return TRUE;
5763 }
5764
5765 if (h != NULL)
5766 {
5767 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5768 got_count = &h->got.refcount;
5769 }
5770 else
5771 {
5772 bfd_signed_vma *lgot_refs;
5773 struct plt_entry **local_plt;
5774 unsigned char *lgot_masks;
5775
5776 lgot_refs = elf_local_got_refcounts (ibfd);
5777 if (lgot_refs == NULL)
5778 abort ();
5779 local_plt = (struct plt_entry **)
5780 (lgot_refs + symtab_hdr->sh_info);
5781 lgot_masks = (unsigned char *)
5782 (local_plt + symtab_hdr->sh_info);
5783 tls_mask = &lgot_masks[r_symndx];
5784 got_count = &lgot_refs[r_symndx];
5785 }
5786
5787 /* If we don't have old-style __tls_get_addr calls
5788 without TLSGD/TLSLD marker relocs, and we haven't
5789 found a new-style __tls_get_addr call with a
5790 marker for this symbol, then we either have a
5791 broken object file or an -mlongcall style
5792 indirect call to __tls_get_addr without a marker.
5793 Disable optimization in this case. */
5794 if ((tls_clear & (TLS_GD | TLS_LD)) != 0
5795 && !sec->has_tls_get_addr_call
5796 && ((*tls_mask & (TLS_TLS | TLS_MARK))
5797 != (TLS_TLS | TLS_MARK)))
5798 continue;
5799
5800 if (expecting_tls_get_addr)
5801 {
5802 struct plt_entry *ent;
5803 bfd_vma addend = 0;
5804
5805 if (bfd_link_pic (info)
5806 && (ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24
5807 || ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTCALL))
5808 addend = rel[1].r_addend;
5809 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5810 got2, addend);
5811 if (ent != NULL && ent->plt.refcount > 0)
5812 ent->plt.refcount -= 1;
5813
5814 if (expecting_tls_get_addr == 2)
5815 continue;
5816 }
5817
5818 if (tls_set == 0)
5819 {
5820 /* We managed to get rid of a got entry. */
5821 if (*got_count > 0)
5822 *got_count -= 1;
5823 }
5824
5825 *tls_mask |= tls_set;
5826 *tls_mask &= ~tls_clear;
5827 }
5828
5829 if (elf_section_data (sec)->relocs != relstart)
5830 free (relstart);
5831 }
5832 }
5833 htab->do_tls_opt = 1;
5834 return TRUE;
5835 }
5836 \f
5837 /* Find dynamic relocs for H that apply to read-only sections. */
5838
5839 static asection *
5840 readonly_dynrelocs (struct elf_link_hash_entry *h)
5841 {
5842 struct elf_dyn_relocs *p;
5843
5844 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5845 {
5846 asection *s = p->sec->output_section;
5847
5848 if (s != NULL && (s->flags & SEC_READONLY) != 0)
5849 return p->sec;
5850 }
5851 return NULL;
5852 }
5853
5854 /* Return true if we have dynamic relocs against H or any of its weak
5855 aliases, that apply to read-only sections. Cannot be used after
5856 size_dynamic_sections. */
5857
5858 static bfd_boolean
5859 alias_readonly_dynrelocs (struct elf_link_hash_entry *h)
5860 {
5861 struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h);
5862 do
5863 {
5864 if (readonly_dynrelocs (&eh->elf))
5865 return TRUE;
5866 eh = ppc_elf_hash_entry (eh->elf.u.alias);
5867 } while (eh != NULL && &eh->elf != h);
5868
5869 return FALSE;
5870 }
5871
5872 /* Return whether H has pc-relative dynamic relocs. */
5873
5874 static bfd_boolean
5875 pc_dynrelocs (struct elf_link_hash_entry *h)
5876 {
5877 struct elf_dyn_relocs *p;
5878
5879 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5880 if (p->pc_count != 0)
5881 return TRUE;
5882 return FALSE;
5883 }
5884
5885 /* Adjust a symbol defined by a dynamic object and referenced by a
5886 regular object. The current definition is in some section of the
5887 dynamic object, but we're not including those sections. We have to
5888 change the definition to something the rest of the link can
5889 understand. */
5890
5891 static bfd_boolean
5892 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5893 struct elf_link_hash_entry *h)
5894 {
5895 struct ppc_elf_link_hash_table *htab;
5896 asection *s;
5897
5898 #ifdef DEBUG
5899 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5900 h->root.root.string);
5901 #endif
5902
5903 /* Make sure we know what is going on here. */
5904 htab = ppc_elf_hash_table (info);
5905 BFD_ASSERT (htab->elf.dynobj != NULL
5906 && (h->needs_plt
5907 || h->type == STT_GNU_IFUNC
5908 || h->is_weakalias
5909 || (h->def_dynamic
5910 && h->ref_regular
5911 && !h->def_regular)));
5912
5913 /* Deal with function syms. */
5914 if (h->type == STT_FUNC
5915 || h->type == STT_GNU_IFUNC
5916 || h->needs_plt)
5917 {
5918 bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, h)
5919 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
5920 /* Discard dyn_relocs when non-pic if we've decided that a
5921 function symbol is local. */
5922 if (!bfd_link_pic (info) && local)
5923 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5924
5925 /* Clear procedure linkage table information for any symbol that
5926 won't need a .plt entry. */
5927 struct plt_entry *ent;
5928 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5929 if (ent->plt.refcount > 0)
5930 break;
5931 if (ent == NULL
5932 || (h->type != STT_GNU_IFUNC
5933 && local
5934 && (htab->can_convert_all_inline_plt
5935 || (ppc_elf_hash_entry (h)->tls_mask
5936 & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)))
5937 {
5938 /* A PLT entry is not required/allowed when:
5939
5940 1. We are not using ld.so; because then the PLT entry
5941 can't be set up, so we can't use one. In this case,
5942 ppc_elf_adjust_dynamic_symbol won't even be called.
5943
5944 2. GC has rendered the entry unused.
5945
5946 3. We know for certain that a call to this symbol
5947 will go to this object, or will remain undefined. */
5948 h->plt.plist = NULL;
5949 h->needs_plt = 0;
5950 h->pointer_equality_needed = 0;
5951 }
5952 else
5953 {
5954 /* Taking a function's address in a read/write section
5955 doesn't require us to define the function symbol in the
5956 executable on a plt call stub. A dynamic reloc can
5957 be used instead, giving better runtime performance.
5958 (Calls via that function pointer don't need to bounce
5959 through the plt call stub.) Similarly, use a dynamic
5960 reloc for a weak reference when possible, allowing the
5961 resolution of the symbol to be set at load time rather
5962 than link time. */
5963 if ((h->pointer_equality_needed
5964 || (h->non_got_ref
5965 && !h->ref_regular_nonweak
5966 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5967 && !htab->is_vxworks
5968 && !ppc_elf_hash_entry (h)->has_sda_refs
5969 && !readonly_dynrelocs (h))
5970 {
5971 h->pointer_equality_needed = 0;
5972 /* If we haven't seen a branch reloc and the symbol
5973 isn't an ifunc then we don't need a plt entry. */
5974 if (!h->needs_plt && h->type != STT_GNU_IFUNC)
5975 h->plt.plist = NULL;
5976 }
5977 else if (!bfd_link_pic (info))
5978 /* We are going to be defining the function symbol on the
5979 plt stub, so no dyn_relocs needed when non-pic. */
5980 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
5981 }
5982 h->protected_def = 0;
5983 /* Function symbols can't have copy relocs. */
5984 return TRUE;
5985 }
5986 else
5987 h->plt.plist = NULL;
5988
5989 /* If this is a weak symbol, and there is a real definition, the
5990 processor independent code will have arranged for us to see the
5991 real definition first, and we can just use the same value. */
5992 if (h->is_weakalias)
5993 {
5994 struct elf_link_hash_entry *def = weakdef (h);
5995 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
5996 h->root.u.def.section = def->root.u.def.section;
5997 h->root.u.def.value = def->root.u.def.value;
5998 if (def->root.u.def.section == htab->elf.sdynbss
5999 || def->root.u.def.section == htab->elf.sdynrelro
6000 || def->root.u.def.section == htab->dynsbss)
6001 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
6002 return TRUE;
6003 }
6004
6005 /* This is a reference to a symbol defined by a dynamic object which
6006 is not a function. */
6007
6008 /* If we are creating a shared library, we must presume that the
6009 only references to the symbol are via the global offset table.
6010 For such cases we need not do anything here; the relocations will
6011 be handled correctly by relocate_section. */
6012 if (bfd_link_pic (info))
6013 {
6014 h->protected_def = 0;
6015 return TRUE;
6016 }
6017
6018 /* If there are no references to this symbol that do not use the
6019 GOT, we don't need to generate a copy reloc. */
6020 if (!h->non_got_ref)
6021 {
6022 h->protected_def = 0;
6023 return TRUE;
6024 }
6025
6026 /* Protected variables do not work with .dynbss. The copy in
6027 .dynbss won't be used by the shared library with the protected
6028 definition for the variable. Editing to PIC, or text relocations
6029 are preferable to an incorrect program. */
6030 if (h->protected_def)
6031 {
6032 if (ELIMINATE_COPY_RELOCS
6033 && ppc_elf_hash_entry (h)->has_addr16_ha
6034 && ppc_elf_hash_entry (h)->has_addr16_lo
6035 && htab->params->pic_fixup == 0
6036 && info->disable_target_specific_optimizations <= 1)
6037 htab->params->pic_fixup = 1;
6038 return TRUE;
6039 }
6040
6041 /* If -z nocopyreloc was given, we won't generate them either. */
6042 if (info->nocopyreloc)
6043 return TRUE;
6044
6045 /* If we don't find any dynamic relocs in read-only sections, then
6046 we'll be keeping the dynamic relocs and avoiding the copy reloc.
6047 We can't do this if there are any small data relocations. This
6048 doesn't work on VxWorks, where we can not have dynamic
6049 relocations (other than copy and jump slot relocations) in an
6050 executable. */
6051 if (ELIMINATE_COPY_RELOCS
6052 && !ppc_elf_hash_entry (h)->has_sda_refs
6053 && !htab->is_vxworks
6054 && !h->def_regular
6055 && !alias_readonly_dynrelocs (h))
6056 return TRUE;
6057
6058 /* We must allocate the symbol in our .dynbss section, which will
6059 become part of the .bss section of the executable. There will be
6060 an entry for this symbol in the .dynsym section. The dynamic
6061 object will contain position independent code, so all references
6062 from the dynamic object to this symbol will go through the global
6063 offset table. The dynamic linker will use the .dynsym entry to
6064 determine the address it must put in the global offset table, so
6065 both the dynamic object and the regular object will refer to the
6066 same memory location for the variable.
6067
6068 Of course, if the symbol is referenced using SDAREL relocs, we
6069 must instead allocate it in .sbss. */
6070 if (ppc_elf_hash_entry (h)->has_sda_refs)
6071 s = htab->dynsbss;
6072 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
6073 s = htab->elf.sdynrelro;
6074 else
6075 s = htab->elf.sdynbss;
6076 BFD_ASSERT (s != NULL);
6077
6078 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6079 {
6080 asection *srel;
6081
6082 /* We must generate a R_PPC_COPY reloc to tell the dynamic
6083 linker to copy the initial value out of the dynamic object
6084 and into the runtime process image. */
6085 if (ppc_elf_hash_entry (h)->has_sda_refs)
6086 srel = htab->relsbss;
6087 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
6088 srel = htab->elf.sreldynrelro;
6089 else
6090 srel = htab->elf.srelbss;
6091 BFD_ASSERT (srel != NULL);
6092 srel->size += sizeof (Elf32_External_Rela);
6093 h->needs_copy = 1;
6094 }
6095
6096 /* We no longer want dyn_relocs. */
6097 ppc_elf_hash_entry (h)->dyn_relocs = NULL;
6098 return _bfd_elf_adjust_dynamic_copy (info, h, s);
6099 }
6100 \f
6101 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
6102 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
6103 specifying the addend on the plt relocation. For -fpic code, the sym
6104 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
6105 xxxxxxxx.got2.plt_pic32.<callee>. */
6106
6107 static bfd_boolean
6108 add_stub_sym (struct plt_entry *ent,
6109 struct elf_link_hash_entry *h,
6110 struct bfd_link_info *info)
6111 {
6112 struct elf_link_hash_entry *sh;
6113 size_t len1, len2, len3;
6114 char *name;
6115 const char *stub;
6116 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6117
6118 if (bfd_link_pic (info))
6119 stub = ".plt_pic32.";
6120 else
6121 stub = ".plt_call32.";
6122
6123 len1 = strlen (h->root.root.string);
6124 len2 = strlen (stub);
6125 len3 = 0;
6126 if (ent->sec)
6127 len3 = strlen (ent->sec->name);
6128 name = bfd_malloc (len1 + len2 + len3 + 9);
6129 if (name == NULL)
6130 return FALSE;
6131 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
6132 if (ent->sec)
6133 memcpy (name + 8, ent->sec->name, len3);
6134 memcpy (name + 8 + len3, stub, len2);
6135 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
6136 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
6137 if (sh == NULL)
6138 return FALSE;
6139 if (sh->root.type == bfd_link_hash_new)
6140 {
6141 sh->root.type = bfd_link_hash_defined;
6142 sh->root.u.def.section = htab->glink;
6143 sh->root.u.def.value = ent->glink_offset;
6144 sh->ref_regular = 1;
6145 sh->def_regular = 1;
6146 sh->ref_regular_nonweak = 1;
6147 sh->forced_local = 1;
6148 sh->non_elf = 0;
6149 sh->root.linker_def = 1;
6150 }
6151 return TRUE;
6152 }
6153
6154 /* Allocate NEED contiguous space in .got, and return the offset.
6155 Handles allocation of the got header when crossing 32k. */
6156
6157 static bfd_vma
6158 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
6159 {
6160 bfd_vma where;
6161 unsigned int max_before_header;
6162
6163 if (htab->plt_type == PLT_VXWORKS)
6164 {
6165 where = htab->elf.sgot->size;
6166 htab->elf.sgot->size += need;
6167 }
6168 else
6169 {
6170 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
6171 if (need <= htab->got_gap)
6172 {
6173 where = max_before_header - htab->got_gap;
6174 htab->got_gap -= need;
6175 }
6176 else
6177 {
6178 if (htab->elf.sgot->size + need > max_before_header
6179 && htab->elf.sgot->size <= max_before_header)
6180 {
6181 htab->got_gap = max_before_header - htab->elf.sgot->size;
6182 htab->elf.sgot->size = max_before_header + htab->got_header_size;
6183 }
6184 where = htab->elf.sgot->size;
6185 htab->elf.sgot->size += need;
6186 }
6187 }
6188 return where;
6189 }
6190
6191 /* Calculate size of GOT entries for symbol given its TLS_MASK.
6192 TLS_LD is excluded because those go in a special GOT slot. */
6193
6194 static inline unsigned int
6195 got_entries_needed (int tls_mask)
6196 {
6197 unsigned int need;
6198 if ((tls_mask & TLS_TLS) == 0)
6199 need = 4;
6200 else
6201 {
6202 need = 0;
6203 if ((tls_mask & TLS_GD) != 0)
6204 need += 8;
6205 if ((tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6206 need += 4;
6207 if ((tls_mask & TLS_DTPREL) != 0)
6208 need += 4;
6209 }
6210 return need;
6211 }
6212
6213 /* Calculate size of relocs needed for symbol given its TLS_MASK and
6214 NEEDed GOT entries. KNOWN says a TPREL offset can be calculated at
6215 link time. */
6216
6217 static inline unsigned int
6218 got_relocs_needed (int tls_mask, unsigned int need, bfd_boolean known)
6219 {
6220 /* All the entries we allocated need relocs.
6221 Except IE in executable with a local symbol. We could also omit
6222 the DTPREL reloc on the second word of a GD entry under the same
6223 condition as that for IE, but ld.so needs to differentiate
6224 LD and GD entries. */
6225 if (known && (tls_mask & TLS_TLS) != 0
6226 && (tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6227 need -= 4;
6228 return need * sizeof (Elf32_External_Rela) / 4;
6229 }
6230
6231 /* If H is undefined, make it dynamic if that makes sense. */
6232
6233 static bfd_boolean
6234 ensure_undef_dynamic (struct bfd_link_info *info,
6235 struct elf_link_hash_entry *h)
6236 {
6237 struct elf_link_hash_table *htab = elf_hash_table (info);
6238
6239 if (htab->dynamic_sections_created
6240 && ((info->dynamic_undefined_weak != 0
6241 && h->root.type == bfd_link_hash_undefweak)
6242 || h->root.type == bfd_link_hash_undefined)
6243 && h->dynindx == -1
6244 && !h->forced_local
6245 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
6246 return bfd_elf_link_record_dynamic_symbol (info, h);
6247 return TRUE;
6248 }
6249
6250 /* Allocate space in associated reloc sections for dynamic relocs. */
6251
6252 static bfd_boolean
6253 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6254 {
6255 struct bfd_link_info *info = inf;
6256 struct ppc_elf_link_hash_entry *eh;
6257 struct ppc_elf_link_hash_table *htab;
6258 struct elf_dyn_relocs *p;
6259 bfd_boolean dyn;
6260
6261 if (h->root.type == bfd_link_hash_indirect)
6262 return TRUE;
6263
6264 htab = ppc_elf_hash_table (info);
6265 eh = (struct ppc_elf_link_hash_entry *) h;
6266 if (eh->elf.got.refcount > 0
6267 || (ELIMINATE_COPY_RELOCS
6268 && !eh->elf.def_regular
6269 && eh->elf.protected_def
6270 && eh->has_addr16_ha
6271 && eh->has_addr16_lo
6272 && htab->params->pic_fixup > 0))
6273 {
6274 unsigned int need;
6275
6276 /* Make sure this symbol is output as a dynamic symbol. */
6277 if (!ensure_undef_dynamic (info, &eh->elf))
6278 return FALSE;
6279
6280 need = 0;
6281 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
6282 {
6283 if (!eh->elf.def_dynamic)
6284 /* We'll just use htab->tlsld_got.offset. This should
6285 always be the case. It's a little odd if we have
6286 a local dynamic reloc against a non-local symbol. */
6287 htab->tlsld_got.refcount += 1;
6288 else
6289 need += 8;
6290 }
6291 need += got_entries_needed (eh->tls_mask);
6292 if (need == 0)
6293 eh->elf.got.offset = (bfd_vma) -1;
6294 else
6295 {
6296 eh->elf.got.offset = allocate_got (htab, need);
6297 if ((bfd_link_pic (info)
6298 || (htab->elf.dynamic_sections_created
6299 && eh->elf.dynindx != -1
6300 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
6301 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
6302 {
6303 asection *rsec;
6304 bfd_boolean tprel_known = (bfd_link_executable (info)
6305 && SYMBOL_REFERENCES_LOCAL (info,
6306 &eh->elf));
6307
6308 need = got_relocs_needed (eh->tls_mask, need, tprel_known);
6309 if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD)
6310 && eh->elf.def_dynamic)
6311 need -= sizeof (Elf32_External_Rela);
6312 rsec = htab->elf.srelgot;
6313 if (eh->elf.type == STT_GNU_IFUNC)
6314 rsec = htab->elf.irelplt;
6315 rsec->size += need;
6316 }
6317 }
6318 }
6319 else
6320 eh->elf.got.offset = (bfd_vma) -1;
6321
6322 /* If no dynamic sections we can't have dynamic relocs, except for
6323 IFUNCs which are handled even in static executables. */
6324 if (!htab->elf.dynamic_sections_created
6325 && h->type != STT_GNU_IFUNC)
6326 eh->dyn_relocs = NULL;
6327
6328 /* Discard relocs on undefined symbols that must be local. */
6329 else if (h->root.type == bfd_link_hash_undefined
6330 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6331 eh->dyn_relocs = NULL;
6332
6333 /* Also discard relocs on undefined weak syms with non-default
6334 visibility, or when dynamic_undefined_weak says so. */
6335 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
6336 eh->dyn_relocs = NULL;
6337
6338 if (eh->dyn_relocs == NULL)
6339 ;
6340
6341 /* In the shared -Bsymbolic case, discard space allocated for
6342 dynamic pc-relative relocs against symbols which turn out to be
6343 defined in regular objects. For the normal shared case, discard
6344 space for relocs that have become local due to symbol visibility
6345 changes. */
6346 else if (bfd_link_pic (info))
6347 {
6348 /* Relocs that use pc_count are those that appear on a call insn,
6349 or certain REL relocs (see must_be_dyn_reloc) that can be
6350 generated via assembly. We want calls to protected symbols to
6351 resolve directly to the function rather than going via the plt.
6352 If people want function pointer comparisons to work as expected
6353 then they should avoid writing weird assembly. */
6354 if (SYMBOL_CALLS_LOCAL (info, h))
6355 {
6356 struct elf_dyn_relocs **pp;
6357
6358 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6359 {
6360 p->count -= p->pc_count;
6361 p->pc_count = 0;
6362 if (p->count == 0)
6363 *pp = p->next;
6364 else
6365 pp = &p->next;
6366 }
6367 }
6368
6369 if (htab->is_vxworks)
6370 {
6371 struct elf_dyn_relocs **pp;
6372
6373 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6374 {
6375 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6376 *pp = p->next;
6377 else
6378 pp = &p->next;
6379 }
6380 }
6381
6382 if (eh->dyn_relocs != NULL)
6383 {
6384 /* Make sure this symbol is output as a dynamic symbol. */
6385 if (!ensure_undef_dynamic (info, h))
6386 return FALSE;
6387 }
6388 }
6389 else if (ELIMINATE_COPY_RELOCS)
6390 {
6391 /* For the non-pic case, discard space for relocs against
6392 symbols which turn out to need copy relocs or are not
6393 dynamic. */
6394 if (h->dynamic_adjusted
6395 && !h->def_regular
6396 && !ELF_COMMON_DEF_P (h)
6397 && !(h->protected_def
6398 && eh->has_addr16_ha
6399 && eh->has_addr16_lo
6400 && htab->params->pic_fixup > 0))
6401 {
6402 /* Make sure this symbol is output as a dynamic symbol. */
6403 if (!ensure_undef_dynamic (info, h))
6404 return FALSE;
6405
6406 if (h->dynindx == -1)
6407 eh->dyn_relocs = NULL;
6408 }
6409 else
6410 eh->dyn_relocs = NULL;
6411 }
6412
6413 /* Allocate space. */
6414 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6415 {
6416 asection *sreloc = elf_section_data (p->sec)->sreloc;
6417 if (eh->elf.type == STT_GNU_IFUNC)
6418 sreloc = htab->elf.irelplt;
6419 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6420 }
6421
6422 /* Handle PLT relocs. Done last, after dynindx has settled.
6423 We might need a PLT entry when the symbol
6424 a) is dynamic, or
6425 b) is an ifunc, or
6426 c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or
6427 d) has plt16 relocs and we are linking statically. */
6428 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6429 if (dyn
6430 || h->type == STT_GNU_IFUNC
6431 || (h->needs_plt && h->dynamic_adjusted)
6432 || (h->needs_plt
6433 && h->def_regular
6434 && !htab->elf.dynamic_sections_created
6435 && !htab->can_convert_all_inline_plt
6436 && (ppc_elf_hash_entry (h)->tls_mask
6437 & (TLS_TLS | PLT_KEEP)) == PLT_KEEP))
6438 {
6439 struct plt_entry *ent;
6440 bfd_boolean doneone = FALSE;
6441 bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
6442
6443 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6444 if (ent->plt.refcount > 0)
6445 {
6446 asection *s = htab->elf.splt;
6447
6448 if (!dyn)
6449 {
6450 if (h->type == STT_GNU_IFUNC)
6451 s = htab->elf.iplt;
6452 else
6453 s = htab->pltlocal;
6454 }
6455
6456 if (htab->plt_type == PLT_NEW || !dyn)
6457 {
6458 if (!doneone)
6459 {
6460 plt_offset = s->size;
6461 s->size += 4;
6462 }
6463 ent->plt.offset = plt_offset;
6464
6465 if (s == htab->pltlocal)
6466 ent->glink_offset = glink_offset;
6467 else
6468 {
6469 s = htab->glink;
6470 if (!doneone || bfd_link_pic (info))
6471 {
6472 glink_offset = s->size;
6473 s->size += GLINK_ENTRY_SIZE (htab, h);
6474 }
6475 if (!doneone
6476 && !bfd_link_pic (info)
6477 && h->def_dynamic
6478 && !h->def_regular)
6479 {
6480 h->root.u.def.section = s;
6481 h->root.u.def.value = glink_offset;
6482 }
6483 ent->glink_offset = glink_offset;
6484
6485 if (htab->params->emit_stub_syms
6486 && !add_stub_sym (ent, h, info))
6487 return FALSE;
6488 }
6489 }
6490 else
6491 {
6492 if (!doneone)
6493 {
6494 /* If this is the first .plt entry, make room
6495 for the special first entry. */
6496 if (s->size == 0)
6497 s->size += htab->plt_initial_entry_size;
6498
6499 /* The PowerPC PLT is actually composed of two
6500 parts, the first part is 2 words (for a load
6501 and a jump), and then there is a remaining
6502 word available at the end. */
6503 plt_offset = (htab->plt_initial_entry_size
6504 + (htab->plt_slot_size
6505 * ((s->size
6506 - htab->plt_initial_entry_size)
6507 / htab->plt_entry_size)));
6508
6509 /* If this symbol is not defined in a regular
6510 file, and we are not generating a shared
6511 library, then set the symbol to this location
6512 in the .plt. This is to avoid text
6513 relocations, and is required to make
6514 function pointers compare as equal between
6515 the normal executable and the shared library. */
6516 if (! bfd_link_pic (info)
6517 && h->def_dynamic
6518 && !h->def_regular)
6519 {
6520 h->root.u.def.section = s;
6521 h->root.u.def.value = plt_offset;
6522 }
6523
6524 /* Make room for this entry. */
6525 s->size += htab->plt_entry_size;
6526 /* After the 8192nd entry, room for two entries
6527 is allocated. */
6528 if (htab->plt_type == PLT_OLD
6529 && (s->size - htab->plt_initial_entry_size)
6530 / htab->plt_entry_size
6531 > PLT_NUM_SINGLE_ENTRIES)
6532 s->size += htab->plt_entry_size;
6533 }
6534 ent->plt.offset = plt_offset;
6535 }
6536
6537 /* We also need to make an entry in the .rela.plt section. */
6538 if (!doneone)
6539 {
6540 if (!dyn)
6541 {
6542 if (h->type == STT_GNU_IFUNC)
6543 {
6544 s = htab->elf.irelplt;
6545 s->size += sizeof (Elf32_External_Rela);
6546 }
6547 else if (bfd_link_pic (info))
6548 {
6549 s = htab->relpltlocal;
6550 s->size += sizeof (Elf32_External_Rela);
6551 }
6552 }
6553 else
6554 {
6555 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6556
6557 if (htab->plt_type == PLT_VXWORKS)
6558 {
6559 /* Allocate space for the unloaded relocations. */
6560 if (!bfd_link_pic (info)
6561 && htab->elf.dynamic_sections_created)
6562 {
6563 if (ent->plt.offset
6564 == (bfd_vma) htab->plt_initial_entry_size)
6565 {
6566 htab->srelplt2->size
6567 += (sizeof (Elf32_External_Rela)
6568 * VXWORKS_PLTRESOLVE_RELOCS);
6569 }
6570
6571 htab->srelplt2->size
6572 += (sizeof (Elf32_External_Rela)
6573 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6574 }
6575
6576 /* Every PLT entry has an associated GOT entry in
6577 .got.plt. */
6578 htab->elf.sgotplt->size += 4;
6579 }
6580 }
6581 doneone = TRUE;
6582 }
6583 }
6584 else
6585 ent->plt.offset = (bfd_vma) -1;
6586
6587 if (!doneone)
6588 {
6589 h->plt.plist = NULL;
6590 h->needs_plt = 0;
6591 }
6592 }
6593 else
6594 {
6595 h->plt.plist = NULL;
6596 h->needs_plt = 0;
6597 }
6598
6599 return TRUE;
6600 }
6601
6602 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6603 read-only sections. */
6604
6605 static bfd_boolean
6606 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
6607 {
6608 asection *sec;
6609
6610 if (h->root.type == bfd_link_hash_indirect)
6611 return TRUE;
6612
6613 sec = readonly_dynrelocs (h);
6614 if (sec != NULL)
6615 {
6616 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
6617
6618 info->flags |= DF_TEXTREL;
6619 info->callbacks->minfo
6620 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
6621 sec->owner, h->root.root.string, sec);
6622
6623 /* Not an error, just cut short the traversal. */
6624 return FALSE;
6625 }
6626 return TRUE;
6627 }
6628
6629 static const unsigned char glink_eh_frame_cie[] =
6630 {
6631 0, 0, 0, 16, /* length. */
6632 0, 0, 0, 0, /* id. */
6633 1, /* CIE version. */
6634 'z', 'R', 0, /* Augmentation string. */
6635 4, /* Code alignment. */
6636 0x7c, /* Data alignment. */
6637 65, /* RA reg. */
6638 1, /* Augmentation size. */
6639 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6640 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6641 };
6642
6643 /* Set the sizes of the dynamic sections. */
6644
6645 static bfd_boolean
6646 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6647 struct bfd_link_info *info)
6648 {
6649 struct ppc_elf_link_hash_table *htab;
6650 asection *s;
6651 bfd_boolean relocs;
6652 bfd *ibfd;
6653
6654 #ifdef DEBUG
6655 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6656 #endif
6657
6658 htab = ppc_elf_hash_table (info);
6659 BFD_ASSERT (htab->elf.dynobj != NULL);
6660
6661 if (elf_hash_table (info)->dynamic_sections_created)
6662 {
6663 /* Set the contents of the .interp section to the interpreter. */
6664 if (bfd_link_executable (info) && !info->nointerp)
6665 {
6666 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6667 BFD_ASSERT (s != NULL);
6668 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6669 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6670 }
6671 }
6672
6673 if (htab->plt_type == PLT_OLD)
6674 htab->got_header_size = 16;
6675 else if (htab->plt_type == PLT_NEW)
6676 htab->got_header_size = 12;
6677
6678 /* Set up .got offsets for local syms, and space for local dynamic
6679 relocs. */
6680 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6681 {
6682 bfd_signed_vma *local_got;
6683 bfd_signed_vma *end_local_got;
6684 struct plt_entry **local_plt;
6685 struct plt_entry **end_local_plt;
6686 char *lgot_masks;
6687 bfd_size_type locsymcount;
6688 Elf_Internal_Shdr *symtab_hdr;
6689
6690 if (!is_ppc_elf (ibfd))
6691 continue;
6692
6693 for (s = ibfd->sections; s != NULL; s = s->next)
6694 {
6695 struct ppc_dyn_relocs *p;
6696
6697 for (p = ((struct ppc_dyn_relocs *)
6698 elf_section_data (s)->local_dynrel);
6699 p != NULL;
6700 p = p->next)
6701 {
6702 if (!bfd_is_abs_section (p->sec)
6703 && bfd_is_abs_section (p->sec->output_section))
6704 {
6705 /* Input section has been discarded, either because
6706 it is a copy of a linkonce section or due to
6707 linker script /DISCARD/, so we'll be discarding
6708 the relocs too. */
6709 }
6710 else if (htab->is_vxworks
6711 && strcmp (p->sec->output_section->name,
6712 ".tls_vars") == 0)
6713 {
6714 /* Relocations in vxworks .tls_vars sections are
6715 handled specially by the loader. */
6716 }
6717 else if (p->count != 0)
6718 {
6719 asection *sreloc = elf_section_data (p->sec)->sreloc;
6720 if (p->ifunc)
6721 sreloc = htab->elf.irelplt;
6722 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6723 if ((p->sec->output_section->flags
6724 & (SEC_READONLY | SEC_ALLOC))
6725 == (SEC_READONLY | SEC_ALLOC))
6726 {
6727 info->flags |= DF_TEXTREL;
6728 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
6729 p->sec->owner, p->sec);
6730 }
6731 }
6732 }
6733 }
6734
6735 local_got = elf_local_got_refcounts (ibfd);
6736 if (!local_got)
6737 continue;
6738
6739 symtab_hdr = &elf_symtab_hdr (ibfd);
6740 locsymcount = symtab_hdr->sh_info;
6741 end_local_got = local_got + locsymcount;
6742 local_plt = (struct plt_entry **) end_local_got;
6743 end_local_plt = local_plt + locsymcount;
6744 lgot_masks = (char *) end_local_plt;
6745
6746 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6747 if (*local_got > 0)
6748 {
6749 unsigned int need;
6750 if ((*lgot_masks & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD))
6751 htab->tlsld_got.refcount += 1;
6752 need = got_entries_needed (*lgot_masks);
6753 if (need == 0)
6754 *local_got = (bfd_vma) -1;
6755 else
6756 {
6757 *local_got = allocate_got (htab, need);
6758 if (bfd_link_pic (info))
6759 {
6760 asection *srel;
6761 bfd_boolean tprel_known = bfd_link_executable (info);
6762
6763 need = got_relocs_needed (*lgot_masks, need, tprel_known);
6764 srel = htab->elf.srelgot;
6765 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6766 srel = htab->elf.irelplt;
6767 srel->size += need;
6768 }
6769 }
6770 }
6771 else
6772 *local_got = (bfd_vma) -1;
6773
6774 if (htab->is_vxworks)
6775 continue;
6776
6777 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6778 lgot_masks = (char *) end_local_plt;
6779 for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks)
6780 {
6781 struct plt_entry *ent;
6782 bfd_boolean doneone = FALSE;
6783 bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1;
6784
6785 for (ent = *local_plt; ent != NULL; ent = ent->next)
6786 if (ent->plt.refcount > 0)
6787 {
6788 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6789 s = htab->elf.iplt;
6790 else if (htab->can_convert_all_inline_plt
6791 || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP)
6792 {
6793 ent->plt.offset = (bfd_vma) -1;
6794 continue;
6795 }
6796 else
6797 s = htab->pltlocal;
6798
6799 if (!doneone)
6800 {
6801 plt_offset = s->size;
6802 s->size += 4;
6803 }
6804 ent->plt.offset = plt_offset;
6805
6806 if (s != htab->pltlocal && (!doneone || bfd_link_pic (info)))
6807 {
6808 s = htab->glink;
6809 glink_offset = s->size;
6810 s->size += GLINK_ENTRY_SIZE (htab, NULL);
6811 }
6812 ent->glink_offset = glink_offset;
6813
6814 if (!doneone)
6815 {
6816 if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC)
6817 {
6818 s = htab->elf.irelplt;
6819 s->size += sizeof (Elf32_External_Rela);
6820 }
6821 else if (bfd_link_pic (info))
6822 {
6823 s = htab->relpltlocal;
6824 s->size += sizeof (Elf32_External_Rela);
6825 }
6826 doneone = TRUE;
6827 }
6828 }
6829 else
6830 ent->plt.offset = (bfd_vma) -1;
6831 }
6832 }
6833
6834 /* Allocate space for global sym dynamic relocs. */
6835 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6836
6837 if (htab->tlsld_got.refcount > 0)
6838 {
6839 htab->tlsld_got.offset = allocate_got (htab, 8);
6840 if (bfd_link_pic (info))
6841 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6842 }
6843 else
6844 htab->tlsld_got.offset = (bfd_vma) -1;
6845
6846 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6847 {
6848 unsigned int g_o_t = 32768;
6849
6850 /* If we haven't allocated the header, do so now. When we get here,
6851 for old plt/got the got size will be 0 to 32764 (not allocated),
6852 or 32780 to 65536 (header allocated). For new plt/got, the
6853 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6854 if (htab->elf.sgot->size <= 32768)
6855 {
6856 g_o_t = htab->elf.sgot->size;
6857 if (htab->plt_type == PLT_OLD)
6858 g_o_t += 4;
6859 htab->elf.sgot->size += htab->got_header_size;
6860 }
6861
6862 htab->elf.hgot->root.u.def.value = g_o_t;
6863 }
6864 if (bfd_link_pic (info))
6865 {
6866 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6867
6868 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6869 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6870 }
6871 if (info->emitrelocations)
6872 {
6873 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6874
6875 if (sda != NULL && sda->ref_regular)
6876 sda->root.u.def.section->flags |= SEC_KEEP;
6877 sda = htab->sdata[1].sym;
6878 if (sda != NULL && sda->ref_regular)
6879 sda->root.u.def.section->flags |= SEC_KEEP;
6880 }
6881
6882 if (htab->glink != NULL
6883 && htab->glink->size != 0
6884 && htab->elf.dynamic_sections_created)
6885 {
6886 htab->glink_pltresolve = htab->glink->size;
6887 /* Space for the branch table. */
6888 htab->glink->size
6889 += htab->elf.srelplt->size / (sizeof (Elf32_External_Rela) / 4) - 4;
6890 /* Pad out to align the start of PLTresolve. */
6891 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6892 ? 63 : 15);
6893 htab->glink->size += GLINK_PLTRESOLVE;
6894
6895 if (htab->params->emit_stub_syms)
6896 {
6897 struct elf_link_hash_entry *sh;
6898 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6899 TRUE, FALSE, FALSE);
6900 if (sh == NULL)
6901 return FALSE;
6902 if (sh->root.type == bfd_link_hash_new)
6903 {
6904 sh->root.type = bfd_link_hash_defined;
6905 sh->root.u.def.section = htab->glink;
6906 sh->root.u.def.value = htab->glink_pltresolve;
6907 sh->ref_regular = 1;
6908 sh->def_regular = 1;
6909 sh->ref_regular_nonweak = 1;
6910 sh->forced_local = 1;
6911 sh->non_elf = 0;
6912 sh->root.linker_def = 1;
6913 }
6914 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6915 TRUE, FALSE, FALSE);
6916 if (sh == NULL)
6917 return FALSE;
6918 if (sh->root.type == bfd_link_hash_new)
6919 {
6920 sh->root.type = bfd_link_hash_defined;
6921 sh->root.u.def.section = htab->glink;
6922 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6923 sh->ref_regular = 1;
6924 sh->def_regular = 1;
6925 sh->ref_regular_nonweak = 1;
6926 sh->forced_local = 1;
6927 sh->non_elf = 0;
6928 sh->root.linker_def = 1;
6929 }
6930 }
6931 }
6932
6933 if (htab->glink != NULL
6934 && htab->glink->size != 0
6935 && htab->glink_eh_frame != NULL
6936 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6937 && _bfd_elf_eh_frame_present (info))
6938 {
6939 s = htab->glink_eh_frame;
6940 s->size = sizeof (glink_eh_frame_cie) + 20;
6941 if (bfd_link_pic (info))
6942 {
6943 s->size += 4;
6944 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6945 s->size += 4;
6946 }
6947 }
6948
6949 /* We've now determined the sizes of the various dynamic sections.
6950 Allocate memory for them. */
6951 relocs = FALSE;
6952 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6953 {
6954 bfd_boolean strip_section = TRUE;
6955
6956 if ((s->flags & SEC_LINKER_CREATED) == 0)
6957 continue;
6958
6959 if (s == htab->elf.splt
6960 || s == htab->elf.sgot)
6961 {
6962 /* We'd like to strip these sections if they aren't needed, but if
6963 we've exported dynamic symbols from them we must leave them.
6964 It's too late to tell BFD to get rid of the symbols. */
6965 if (htab->elf.hplt != NULL)
6966 strip_section = FALSE;
6967 /* Strip this section if we don't need it; see the
6968 comment below. */
6969 }
6970 else if (s == htab->elf.iplt
6971 || s == htab->pltlocal
6972 || s == htab->glink
6973 || s == htab->glink_eh_frame
6974 || s == htab->elf.sgotplt
6975 || s == htab->sbss
6976 || s == htab->elf.sdynbss
6977 || s == htab->elf.sdynrelro
6978 || s == htab->dynsbss)
6979 {
6980 /* Strip these too. */
6981 }
6982 else if (s == htab->sdata[0].section
6983 || s == htab->sdata[1].section)
6984 {
6985 strip_section = (s->flags & SEC_KEEP) == 0;
6986 }
6987 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6988 ".rela"))
6989 {
6990 if (s->size != 0)
6991 {
6992 /* Remember whether there are any relocation sections. */
6993 relocs = TRUE;
6994
6995 /* We use the reloc_count field as a counter if we need
6996 to copy relocs into the output file. */
6997 s->reloc_count = 0;
6998 }
6999 }
7000 else
7001 {
7002 /* It's not one of our sections, so don't allocate space. */
7003 continue;
7004 }
7005
7006 if (s->size == 0 && strip_section)
7007 {
7008 /* If we don't need this section, strip it from the
7009 output file. This is mostly to handle .rela.bss and
7010 .rela.plt. We must create both sections in
7011 create_dynamic_sections, because they must be created
7012 before the linker maps input sections to output
7013 sections. The linker does that before
7014 adjust_dynamic_symbol is called, and it is that
7015 function which decides whether anything needs to go
7016 into these sections. */
7017 s->flags |= SEC_EXCLUDE;
7018 continue;
7019 }
7020
7021 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7022 continue;
7023
7024 /* Allocate memory for the section contents. */
7025 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
7026 if (s->contents == NULL)
7027 return FALSE;
7028 }
7029
7030 if (htab->elf.dynamic_sections_created)
7031 {
7032 /* Add some entries to the .dynamic section. We fill in the
7033 values later, in ppc_elf_finish_dynamic_sections, but we
7034 must add the entries now so that we get the correct size for
7035 the .dynamic section. The DT_DEBUG entry is filled in by the
7036 dynamic linker and used by the debugger. */
7037 #define add_dynamic_entry(TAG, VAL) \
7038 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7039
7040 if (bfd_link_executable (info))
7041 {
7042 if (!add_dynamic_entry (DT_DEBUG, 0))
7043 return FALSE;
7044 }
7045
7046 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
7047 {
7048 if (!add_dynamic_entry (DT_PLTGOT, 0)
7049 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7050 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7051 || !add_dynamic_entry (DT_JMPREL, 0))
7052 return FALSE;
7053 }
7054
7055 if (htab->plt_type == PLT_NEW
7056 && htab->glink != NULL
7057 && htab->glink->size != 0)
7058 {
7059 if (!add_dynamic_entry (DT_PPC_GOT, 0))
7060 return FALSE;
7061 if (!htab->params->no_tls_get_addr_opt
7062 && htab->tls_get_addr != NULL
7063 && htab->tls_get_addr->plt.plist != NULL
7064 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
7065 return FALSE;
7066 }
7067
7068 if (relocs)
7069 {
7070 if (!add_dynamic_entry (DT_RELA, 0)
7071 || !add_dynamic_entry (DT_RELASZ, 0)
7072 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
7073 return FALSE;
7074 }
7075
7076 /* If any dynamic relocs apply to a read-only section, then we
7077 need a DT_TEXTREL entry. */
7078 if ((info->flags & DF_TEXTREL) == 0)
7079 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
7080 info);
7081
7082 if ((info->flags & DF_TEXTREL) != 0)
7083 {
7084 if (!add_dynamic_entry (DT_TEXTREL, 0))
7085 return FALSE;
7086 }
7087 if (htab->is_vxworks
7088 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
7089 return FALSE;
7090 }
7091 #undef add_dynamic_entry
7092
7093 if (htab->glink_eh_frame != NULL
7094 && htab->glink_eh_frame->contents != NULL)
7095 {
7096 unsigned char *p = htab->glink_eh_frame->contents;
7097 bfd_vma val;
7098
7099 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
7100 /* CIE length (rewrite in case little-endian). */
7101 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
7102 p += sizeof (glink_eh_frame_cie);
7103 /* FDE length. */
7104 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
7105 bfd_put_32 (htab->elf.dynobj, val, p);
7106 p += 4;
7107 /* CIE pointer. */
7108 val = p - htab->glink_eh_frame->contents;
7109 bfd_put_32 (htab->elf.dynobj, val, p);
7110 p += 4;
7111 /* Offset to .glink. Set later. */
7112 p += 4;
7113 /* .glink size. */
7114 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
7115 p += 4;
7116 /* Augmentation. */
7117 p += 1;
7118
7119 if (bfd_link_pic (info)
7120 && htab->elf.dynamic_sections_created)
7121 {
7122 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
7123 if (adv < 64)
7124 *p++ = DW_CFA_advance_loc + adv;
7125 else if (adv < 256)
7126 {
7127 *p++ = DW_CFA_advance_loc1;
7128 *p++ = adv;
7129 }
7130 else if (adv < 65536)
7131 {
7132 *p++ = DW_CFA_advance_loc2;
7133 bfd_put_16 (htab->elf.dynobj, adv, p);
7134 p += 2;
7135 }
7136 else
7137 {
7138 *p++ = DW_CFA_advance_loc4;
7139 bfd_put_32 (htab->elf.dynobj, adv, p);
7140 p += 4;
7141 }
7142 *p++ = DW_CFA_register;
7143 *p++ = 65;
7144 p++;
7145 *p++ = DW_CFA_advance_loc + 4;
7146 *p++ = DW_CFA_restore_extended;
7147 *p++ = 65;
7148 }
7149 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
7150 == htab->glink_eh_frame->size);
7151 }
7152
7153 return TRUE;
7154 }
7155
7156 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
7157 if it looks like nothing is using them. */
7158
7159 static void
7160 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
7161 {
7162 struct elf_link_hash_entry *sda = lsect->sym;
7163
7164 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
7165 {
7166 asection *s;
7167
7168 s = bfd_get_section_by_name (output_bfd, lsect->name);
7169 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
7170 {
7171 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
7172 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
7173 {
7174 sda->def_regular = 0;
7175 /* This is somewhat magic. See elf_link_output_extsym. */
7176 sda->ref_dynamic = 1;
7177 sda->forced_local = 0;
7178 }
7179 }
7180 }
7181 }
7182
7183 void
7184 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
7185 {
7186 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7187
7188 if (htab != NULL)
7189 {
7190 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
7191 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
7192 }
7193 }
7194
7195
7196 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
7197
7198 static bfd_boolean
7199 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
7200 {
7201 if (h->plt.plist != NULL
7202 && !h->def_regular
7203 && (!h->pointer_equality_needed
7204 || !h->ref_regular_nonweak))
7205 return FALSE;
7206
7207 return _bfd_elf_hash_symbol (h);
7208 }
7209 \f
7210 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
7211
7212 /* Relaxation trampolines. r12 is available for clobbering (r11, is
7213 used for some functions that are allowed to break the ABI). */
7214 static const int shared_stub_entry[] =
7215 {
7216 0x7c0802a6, /* mflr 0 */
7217 0x429f0005, /* bcl 20, 31, .Lxxx */
7218 0x7d8802a6, /* mflr 12 */
7219 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
7220 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
7221 0x7c0803a6, /* mtlr 0 */
7222 0x7d8903a6, /* mtctr 12 */
7223 0x4e800420, /* bctr */
7224 };
7225
7226 static const int stub_entry[] =
7227 {
7228 0x3d800000, /* lis 12,xxx@ha */
7229 0x398c0000, /* addi 12,12,xxx@l */
7230 0x7d8903a6, /* mtctr 12 */
7231 0x4e800420, /* bctr */
7232 };
7233
7234 struct ppc_elf_relax_info
7235 {
7236 unsigned int workaround_size;
7237 unsigned int picfixup_size;
7238 };
7239
7240 /* This function implements long branch trampolines, and the ppc476
7241 icache bug workaround. Any section needing trampolines or patch
7242 space for the workaround has its size extended so that we can
7243 add trampolines at the end of the section. */
7244
7245 static bfd_boolean
7246 ppc_elf_relax_section (bfd *abfd,
7247 asection *isec,
7248 struct bfd_link_info *link_info,
7249 bfd_boolean *again)
7250 {
7251 struct one_branch_fixup
7252 {
7253 struct one_branch_fixup *next;
7254 asection *tsec;
7255 /* Final link, can use the symbol offset. For a
7256 relocatable link we use the symbol's index. */
7257 bfd_vma toff;
7258 bfd_vma trampoff;
7259 };
7260
7261 Elf_Internal_Shdr *symtab_hdr;
7262 bfd_byte *contents = NULL;
7263 Elf_Internal_Sym *isymbuf = NULL;
7264 Elf_Internal_Rela *internal_relocs = NULL;
7265 Elf_Internal_Rela *irel, *irelend = NULL;
7266 struct one_branch_fixup *branch_fixups = NULL;
7267 struct ppc_elf_relax_info *relax_info = NULL;
7268 unsigned changes = 0;
7269 bfd_boolean workaround_change;
7270 struct ppc_elf_link_hash_table *htab;
7271 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
7272 asection *got2;
7273 bfd_boolean maybe_pasted;
7274
7275 *again = FALSE;
7276
7277 /* No need to do anything with non-alloc or non-code sections. */
7278 if ((isec->flags & SEC_ALLOC) == 0
7279 || (isec->flags & SEC_CODE) == 0
7280 || (isec->flags & SEC_LINKER_CREATED) != 0
7281 || isec->size < 4)
7282 return TRUE;
7283
7284 /* We cannot represent the required PIC relocs in the output, so don't
7285 do anything. The linker doesn't support mixing -shared and -r
7286 anyway. */
7287 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
7288 return TRUE;
7289
7290 htab = ppc_elf_hash_table (link_info);
7291 if (htab == NULL)
7292 return TRUE;
7293
7294 isec->size = (isec->size + 3) & -4;
7295 if (isec->rawsize == 0)
7296 isec->rawsize = isec->size;
7297 trampbase = isec->size;
7298
7299 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
7300 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
7301 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
7302
7303 if (htab->params->ppc476_workaround
7304 || htab->params->pic_fixup > 0)
7305 {
7306 if (elf_section_data (isec)->sec_info == NULL)
7307 {
7308 elf_section_data (isec)->sec_info
7309 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
7310 if (elf_section_data (isec)->sec_info == NULL)
7311 return FALSE;
7312 }
7313 relax_info = elf_section_data (isec)->sec_info;
7314 trampbase -= relax_info->workaround_size;
7315 }
7316
7317 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
7318 || strcmp (isec->output_section->name, ".fini") == 0);
7319 /* Space for a branch around any trampolines. */
7320 trampoff = trampbase;
7321 if (maybe_pasted && trampbase == isec->rawsize)
7322 trampoff += 4;
7323
7324 symtab_hdr = &elf_symtab_hdr (abfd);
7325 picfixup_size = 0;
7326 if (htab->params->branch_trampolines
7327 || htab->params->pic_fixup > 0)
7328 {
7329 /* Get a copy of the native relocations. */
7330 if (isec->reloc_count != 0)
7331 {
7332 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
7333 link_info->keep_memory);
7334 if (internal_relocs == NULL)
7335 goto error_return;
7336 }
7337
7338 got2 = bfd_get_section_by_name (abfd, ".got2");
7339
7340 irelend = internal_relocs + isec->reloc_count;
7341 for (irel = internal_relocs; irel < irelend; irel++)
7342 {
7343 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7344 bfd_vma toff, roff;
7345 asection *tsec;
7346 struct one_branch_fixup *f;
7347 size_t insn_offset = 0;
7348 bfd_vma max_branch_offset = 0, val;
7349 bfd_byte *hit_addr;
7350 unsigned long t0;
7351 struct elf_link_hash_entry *h;
7352 Elf_Internal_Sym *isym;
7353 struct plt_entry **plist;
7354 unsigned char sym_type;
7355
7356 switch (r_type)
7357 {
7358 case R_PPC_REL24:
7359 case R_PPC_LOCAL24PC:
7360 case R_PPC_PLTREL24:
7361 case R_PPC_PLTCALL:
7362 max_branch_offset = 1 << 25;
7363 break;
7364
7365 case R_PPC_REL14:
7366 case R_PPC_REL14_BRTAKEN:
7367 case R_PPC_REL14_BRNTAKEN:
7368 max_branch_offset = 1 << 15;
7369 break;
7370
7371 case R_PPC_ADDR16_HA:
7372 if (htab->params->pic_fixup > 0)
7373 break;
7374 continue;
7375
7376 default:
7377 continue;
7378 }
7379
7380 /* Get the value of the symbol referred to by the reloc. */
7381 if (!get_sym_h (&h, &isym, &tsec, NULL, &isymbuf,
7382 ELF32_R_SYM (irel->r_info), abfd))
7383 goto error_return;
7384
7385 if (isym != NULL)
7386 {
7387 if (tsec != NULL)
7388 ;
7389 else if (isym->st_shndx == SHN_ABS)
7390 tsec = bfd_abs_section_ptr;
7391 else
7392 continue;
7393
7394 toff = isym->st_value;
7395 sym_type = ELF_ST_TYPE (isym->st_info);
7396 }
7397 else
7398 {
7399 if (tsec != NULL)
7400 toff = h->root.u.def.value;
7401 else if (h->root.type == bfd_link_hash_undefined
7402 || h->root.type == bfd_link_hash_undefweak)
7403 {
7404 unsigned long indx;
7405
7406 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7407 tsec = bfd_und_section_ptr;
7408 toff = bfd_link_relocatable (link_info) ? indx : 0;
7409 }
7410 else
7411 continue;
7412
7413 /* If this branch is to __tls_get_addr then we may later
7414 optimise away the call. We won't be needing a long-
7415 branch stub in that case. */
7416 if (bfd_link_executable (link_info)
7417 && h == htab->tls_get_addr
7418 && irel != internal_relocs)
7419 {
7420 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7421 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7422 unsigned int tls_mask = 0;
7423
7424 /* The previous reloc should be one of R_PPC_TLSGD or
7425 R_PPC_TLSLD, or for older object files, a reloc
7426 on the __tls_get_addr arg setup insn. Get tls
7427 mask bits from the symbol on that reloc. */
7428 if (t_symndx < symtab_hdr->sh_info)
7429 {
7430 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7431
7432 if (local_got_offsets != NULL)
7433 {
7434 struct plt_entry **local_plt = (struct plt_entry **)
7435 (local_got_offsets + symtab_hdr->sh_info);
7436 char *lgot_masks = (char *)
7437 (local_plt + symtab_hdr->sh_info);
7438 tls_mask = lgot_masks[t_symndx];
7439 }
7440 }
7441 else
7442 {
7443 struct elf_link_hash_entry *th
7444 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7445
7446 while (th->root.type == bfd_link_hash_indirect
7447 || th->root.type == bfd_link_hash_warning)
7448 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7449
7450 tls_mask
7451 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7452 }
7453
7454 /* The mask bits tell us if the call will be
7455 optimised away. */
7456 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7457 && (t_rtype == R_PPC_TLSGD
7458 || t_rtype == R_PPC_GOT_TLSGD16
7459 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7460 continue;
7461 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7462 && (t_rtype == R_PPC_TLSLD
7463 || t_rtype == R_PPC_GOT_TLSLD16
7464 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7465 continue;
7466 }
7467
7468 sym_type = h->type;
7469 }
7470
7471 if (r_type == R_PPC_ADDR16_HA)
7472 {
7473 if (h != NULL
7474 && !h->def_regular
7475 && h->protected_def
7476 && ppc_elf_hash_entry (h)->has_addr16_ha
7477 && ppc_elf_hash_entry (h)->has_addr16_lo)
7478 picfixup_size += 12;
7479 continue;
7480 }
7481
7482 /* The condition here under which we call find_plt_ent must
7483 match that in relocate_section. If we call find_plt_ent here
7484 but not in relocate_section, or vice versa, then the branch
7485 destination used here may be incorrect. */
7486 plist = NULL;
7487 if (h != NULL)
7488 {
7489 /* We know is_branch_reloc (r_type) is true. */
7490 if (h->type == STT_GNU_IFUNC
7491 || r_type == R_PPC_PLTREL24)
7492 plist = &h->plt.plist;
7493 }
7494 else if (sym_type == STT_GNU_IFUNC
7495 && elf_local_got_offsets (abfd) != NULL)
7496 {
7497 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7498 struct plt_entry **local_plt = (struct plt_entry **)
7499 (local_got_offsets + symtab_hdr->sh_info);
7500 plist = local_plt + ELF32_R_SYM (irel->r_info);
7501 }
7502 if (plist != NULL)
7503 {
7504 bfd_vma addend = 0;
7505 struct plt_entry *ent;
7506
7507 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7508 addend = irel->r_addend;
7509 ent = find_plt_ent (plist, got2, addend);
7510 if (ent != NULL)
7511 {
7512 if (htab->plt_type == PLT_NEW
7513 || h == NULL
7514 || !htab->elf.dynamic_sections_created
7515 || h->dynindx == -1)
7516 {
7517 tsec = htab->glink;
7518 toff = ent->glink_offset;
7519 }
7520 else
7521 {
7522 tsec = htab->elf.splt;
7523 toff = ent->plt.offset;
7524 }
7525 }
7526 }
7527
7528 /* If the branch and target are in the same section, you have
7529 no hope of adding stubs. We'll error out later should the
7530 branch overflow. */
7531 if (tsec == isec)
7532 continue;
7533
7534 /* toff is used for the symbol index when the symbol is
7535 undefined and we're doing a relocatable link, so we can't
7536 support addends. It would be possible to do so by
7537 putting the addend in one_branch_fixup but addends on
7538 branches are rare so it hardly seems worth supporting. */
7539 if (bfd_link_relocatable (link_info)
7540 && tsec == bfd_und_section_ptr
7541 && r_type != R_PPC_PLTREL24
7542 && irel->r_addend != 0)
7543 continue;
7544
7545 /* There probably isn't any reason to handle symbols in
7546 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7547 attribute for a code section, and we are only looking at
7548 branches. However, implement it correctly here as a
7549 reference for other target relax_section functions. */
7550 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7551 {
7552 /* At this stage in linking, no SEC_MERGE symbol has been
7553 adjusted, so all references to such symbols need to be
7554 passed through _bfd_merged_section_offset. (Later, in
7555 relocate_section, all SEC_MERGE symbols *except* for
7556 section symbols have been adjusted.)
7557
7558 gas may reduce relocations against symbols in SEC_MERGE
7559 sections to a relocation against the section symbol when
7560 the original addend was zero. When the reloc is against
7561 a section symbol we should include the addend in the
7562 offset passed to _bfd_merged_section_offset, since the
7563 location of interest is the original symbol. On the
7564 other hand, an access to "sym+addend" where "sym" is not
7565 a section symbol should not include the addend; Such an
7566 access is presumed to be an offset from "sym"; The
7567 location of interest is just "sym". */
7568 if (sym_type == STT_SECTION
7569 && r_type != R_PPC_PLTREL24)
7570 toff += irel->r_addend;
7571
7572 toff
7573 = _bfd_merged_section_offset (abfd, &tsec,
7574 elf_section_data (tsec)->sec_info,
7575 toff);
7576
7577 if (sym_type != STT_SECTION
7578 && r_type != R_PPC_PLTREL24)
7579 toff += irel->r_addend;
7580 }
7581 /* PLTREL24 addends are special. */
7582 else if (r_type != R_PPC_PLTREL24)
7583 toff += irel->r_addend;
7584
7585 /* Attempted -shared link of non-pic code loses. */
7586 if ((!bfd_link_relocatable (link_info)
7587 && tsec == bfd_und_section_ptr)
7588 || tsec->output_section == NULL
7589 || (tsec->owner != NULL
7590 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7591 continue;
7592
7593 roff = irel->r_offset;
7594
7595 /* Avoid creating a lot of unnecessary fixups when
7596 relocatable if the output section size is such that a
7597 fixup can be created at final link.
7598 The max_branch_offset adjustment allows for some number
7599 of other fixups being needed at final link. */
7600 if (bfd_link_relocatable (link_info)
7601 && (isec->output_section->rawsize - (isec->output_offset + roff)
7602 < max_branch_offset - (max_branch_offset >> 4)))
7603 continue;
7604
7605 /* If the branch is in range, no need to do anything. */
7606 if (tsec != bfd_und_section_ptr
7607 && (!bfd_link_relocatable (link_info)
7608 /* A relocatable link may have sections moved during
7609 final link, so do not presume they remain in range. */
7610 || tsec->output_section == isec->output_section))
7611 {
7612 bfd_vma symaddr, reladdr;
7613
7614 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7615 reladdr = isec->output_section->vma + isec->output_offset + roff;
7616 if (symaddr - reladdr + max_branch_offset
7617 < 2 * max_branch_offset)
7618 continue;
7619 }
7620
7621 /* Look for an existing fixup to this address. */
7622 for (f = branch_fixups; f ; f = f->next)
7623 if (f->tsec == tsec && f->toff == toff)
7624 break;
7625
7626 if (f == NULL)
7627 {
7628 size_t size;
7629 unsigned long stub_rtype;
7630
7631 val = trampoff - roff;
7632 if (val >= max_branch_offset)
7633 /* Oh dear, we can't reach a trampoline. Don't try to add
7634 one. We'll report an error later. */
7635 continue;
7636
7637 if (bfd_link_pic (link_info))
7638 {
7639 size = 4 * ARRAY_SIZE (shared_stub_entry);
7640 insn_offset = 12;
7641 }
7642 else
7643 {
7644 size = 4 * ARRAY_SIZE (stub_entry);
7645 insn_offset = 0;
7646 }
7647 stub_rtype = R_PPC_RELAX;
7648 if (tsec == htab->elf.splt
7649 || tsec == htab->glink)
7650 {
7651 stub_rtype = R_PPC_RELAX_PLT;
7652 if (r_type == R_PPC_PLTREL24)
7653 stub_rtype = R_PPC_RELAX_PLTREL24;
7654 }
7655
7656 /* Hijack the old relocation. Since we need two
7657 relocations for this use a "composite" reloc. */
7658 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7659 stub_rtype);
7660 irel->r_offset = trampoff + insn_offset;
7661 if (r_type == R_PPC_PLTREL24
7662 && stub_rtype != R_PPC_RELAX_PLTREL24)
7663 irel->r_addend = 0;
7664
7665 /* Record the fixup so we don't do it again this section. */
7666 f = bfd_malloc (sizeof (*f));
7667 f->next = branch_fixups;
7668 f->tsec = tsec;
7669 f->toff = toff;
7670 f->trampoff = trampoff;
7671 branch_fixups = f;
7672
7673 trampoff += size;
7674 changes++;
7675 }
7676 else
7677 {
7678 val = f->trampoff - roff;
7679 if (val >= max_branch_offset)
7680 continue;
7681
7682 /* Nop out the reloc, since we're finalizing things here. */
7683 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7684 }
7685
7686 /* Get the section contents. */
7687 if (contents == NULL)
7688 {
7689 /* Get cached copy if it exists. */
7690 if (elf_section_data (isec)->this_hdr.contents != NULL)
7691 contents = elf_section_data (isec)->this_hdr.contents;
7692 /* Go get them off disk. */
7693 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7694 goto error_return;
7695 }
7696
7697 /* Fix up the existing branch to hit the trampoline. */
7698 hit_addr = contents + roff;
7699 switch (r_type)
7700 {
7701 case R_PPC_REL24:
7702 case R_PPC_LOCAL24PC:
7703 case R_PPC_PLTREL24:
7704 t0 = bfd_get_32 (abfd, hit_addr);
7705 t0 &= ~0x3fffffc;
7706 t0 |= val & 0x3fffffc;
7707 bfd_put_32 (abfd, t0, hit_addr);
7708 break;
7709
7710 case R_PPC_REL14:
7711 case R_PPC_REL14_BRTAKEN:
7712 case R_PPC_REL14_BRNTAKEN:
7713 t0 = bfd_get_32 (abfd, hit_addr);
7714 t0 &= ~0xfffc;
7715 t0 |= val & 0xfffc;
7716 bfd_put_32 (abfd, t0, hit_addr);
7717 break;
7718 }
7719 }
7720
7721 while (branch_fixups != NULL)
7722 {
7723 struct one_branch_fixup *f = branch_fixups;
7724 branch_fixups = branch_fixups->next;
7725 free (f);
7726 }
7727 }
7728
7729 workaround_change = FALSE;
7730 newsize = trampoff;
7731 if (htab->params->ppc476_workaround
7732 && (!bfd_link_relocatable (link_info)
7733 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7734 {
7735 bfd_vma addr, end_addr;
7736 unsigned int crossings;
7737 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7738
7739 addr = isec->output_section->vma + isec->output_offset;
7740 end_addr = addr + trampoff;
7741 addr &= -pagesize;
7742 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7743 if (crossings != 0)
7744 {
7745 /* Keep space aligned, to ensure the patch code itself does
7746 not cross a page. Don't decrease size calculated on a
7747 previous pass as otherwise we might never settle on a layout. */
7748 newsize = 15 - ((end_addr - 1) & 15);
7749 newsize += crossings * 16;
7750 if (relax_info->workaround_size < newsize)
7751 {
7752 relax_info->workaround_size = newsize;
7753 workaround_change = TRUE;
7754 }
7755 /* Ensure relocate_section is called. */
7756 isec->flags |= SEC_RELOC;
7757 }
7758 newsize = trampoff + relax_info->workaround_size;
7759 }
7760
7761 if (htab->params->pic_fixup > 0)
7762 {
7763 picfixup_size -= relax_info->picfixup_size;
7764 if (picfixup_size != 0)
7765 relax_info->picfixup_size += picfixup_size;
7766 newsize += relax_info->picfixup_size;
7767 }
7768
7769 if (changes != 0 || picfixup_size != 0 || workaround_change)
7770 isec->size = newsize;
7771
7772 if (isymbuf != NULL
7773 && symtab_hdr->contents != (unsigned char *) isymbuf)
7774 {
7775 if (! link_info->keep_memory)
7776 free (isymbuf);
7777 else
7778 {
7779 /* Cache the symbols for elf_link_input_bfd. */
7780 symtab_hdr->contents = (unsigned char *) isymbuf;
7781 }
7782 }
7783
7784 if (contents != NULL
7785 && elf_section_data (isec)->this_hdr.contents != contents)
7786 {
7787 if (!changes && !link_info->keep_memory)
7788 free (contents);
7789 else
7790 {
7791 /* Cache the section contents for elf_link_input_bfd. */
7792 elf_section_data (isec)->this_hdr.contents = contents;
7793 }
7794 }
7795
7796 changes += picfixup_size;
7797 if (changes != 0)
7798 {
7799 /* Append sufficient NOP relocs so we can write out relocation
7800 information for the trampolines. */
7801 Elf_Internal_Shdr *rel_hdr;
7802 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7803 * sizeof (*new_relocs));
7804 unsigned ix;
7805
7806 if (!new_relocs)
7807 goto error_return;
7808 memcpy (new_relocs, internal_relocs,
7809 isec->reloc_count * sizeof (*new_relocs));
7810 for (ix = changes; ix--;)
7811 {
7812 irel = new_relocs + ix + isec->reloc_count;
7813
7814 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7815 }
7816 if (internal_relocs != elf_section_data (isec)->relocs)
7817 free (internal_relocs);
7818 elf_section_data (isec)->relocs = new_relocs;
7819 isec->reloc_count += changes;
7820 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7821 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7822 }
7823 else if (internal_relocs != NULL
7824 && elf_section_data (isec)->relocs != internal_relocs)
7825 free (internal_relocs);
7826
7827 *again = changes != 0 || workaround_change;
7828 return TRUE;
7829
7830 error_return:
7831 while (branch_fixups != NULL)
7832 {
7833 struct one_branch_fixup *f = branch_fixups;
7834 branch_fixups = branch_fixups->next;
7835 free (f);
7836 }
7837 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7838 free (isymbuf);
7839 if (contents != NULL
7840 && elf_section_data (isec)->this_hdr.contents != contents)
7841 free (contents);
7842 if (internal_relocs != NULL
7843 && elf_section_data (isec)->relocs != internal_relocs)
7844 free (internal_relocs);
7845 return FALSE;
7846 }
7847 \f
7848 /* What to do when ld finds relocations against symbols defined in
7849 discarded sections. */
7850
7851 static unsigned int
7852 ppc_elf_action_discarded (asection *sec)
7853 {
7854 if (strcmp (".fixup", sec->name) == 0)
7855 return 0;
7856
7857 if (strcmp (".got2", sec->name) == 0)
7858 return 0;
7859
7860 return _bfd_elf_default_action_discarded (sec);
7861 }
7862 \f
7863 /* Fill in the address for a pointer generated in a linker section. */
7864
7865 static bfd_vma
7866 elf_finish_pointer_linker_section (bfd *input_bfd,
7867 elf_linker_section_t *lsect,
7868 struct elf_link_hash_entry *h,
7869 bfd_vma relocation,
7870 const Elf_Internal_Rela *rel)
7871 {
7872 elf_linker_section_pointers_t *linker_section_ptr;
7873
7874 BFD_ASSERT (lsect != NULL);
7875
7876 if (h != NULL)
7877 {
7878 /* Handle global symbol. */
7879 struct ppc_elf_link_hash_entry *eh;
7880
7881 eh = (struct ppc_elf_link_hash_entry *) h;
7882 BFD_ASSERT (eh->elf.def_regular);
7883 linker_section_ptr = eh->linker_section_pointer;
7884 }
7885 else
7886 {
7887 /* Handle local symbol. */
7888 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7889
7890 BFD_ASSERT (is_ppc_elf (input_bfd));
7891 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7892 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7893 }
7894
7895 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7896 rel->r_addend,
7897 lsect);
7898 BFD_ASSERT (linker_section_ptr != NULL);
7899
7900 /* Offset will always be a multiple of four, so use the bottom bit
7901 as a "written" flag. */
7902 if ((linker_section_ptr->offset & 1) == 0)
7903 {
7904 bfd_put_32 (lsect->section->owner,
7905 relocation + linker_section_ptr->addend,
7906 lsect->section->contents + linker_section_ptr->offset);
7907 linker_section_ptr->offset += 1;
7908 }
7909
7910 relocation = (lsect->section->output_section->vma
7911 + lsect->section->output_offset
7912 + linker_section_ptr->offset - 1
7913 - SYM_VAL (lsect->sym));
7914
7915 #ifdef DEBUG
7916 fprintf (stderr,
7917 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7918 lsect->name, (long) relocation, (long) relocation);
7919 #endif
7920
7921 return relocation;
7922 }
7923
7924 #define PPC_LO(v) ((v) & 0xffff)
7925 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7926 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7927
7928 static void
7929 write_glink_stub (struct elf_link_hash_entry *h, struct plt_entry *ent,
7930 asection *plt_sec, unsigned char *p,
7931 struct bfd_link_info *info)
7932 {
7933 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7934 bfd *output_bfd = info->output_bfd;
7935 bfd_vma plt;
7936 unsigned char *end = p + GLINK_ENTRY_SIZE (htab, h);
7937
7938 if (h != NULL
7939 && h == htab->tls_get_addr
7940 && !htab->params->no_tls_get_addr_opt)
7941 {
7942 bfd_put_32 (output_bfd, LWZ_11_3, p);
7943 p += 4;
7944 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
7945 p += 4;
7946 bfd_put_32 (output_bfd, MR_0_3, p);
7947 p += 4;
7948 bfd_put_32 (output_bfd, CMPWI_11_0, p);
7949 p += 4;
7950 bfd_put_32 (output_bfd, ADD_3_12_2, p);
7951 p += 4;
7952 bfd_put_32 (output_bfd, BEQLR, p);
7953 p += 4;
7954 bfd_put_32 (output_bfd, MR_3_0, p);
7955 p += 4;
7956 bfd_put_32 (output_bfd, NOP, p);
7957 p += 4;
7958 }
7959
7960 plt = ((ent->plt.offset & ~1)
7961 + plt_sec->output_section->vma
7962 + plt_sec->output_offset);
7963
7964 if (bfd_link_pic (info))
7965 {
7966 bfd_vma got = 0;
7967
7968 if (ent->addend >= 32768)
7969 got = (ent->addend
7970 + ent->sec->output_section->vma
7971 + ent->sec->output_offset);
7972 else if (htab->elf.hgot != NULL)
7973 got = SYM_VAL (htab->elf.hgot);
7974
7975 plt -= got;
7976
7977 if (plt + 0x8000 < 0x10000)
7978 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7979 else
7980 {
7981 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7982 p += 4;
7983 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7984 }
7985 }
7986 else
7987 {
7988 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7989 p += 4;
7990 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7991 }
7992 p += 4;
7993 bfd_put_32 (output_bfd, MTCTR_11, p);
7994 p += 4;
7995 bfd_put_32 (output_bfd, BCTR, p);
7996 p += 4;
7997 while (p < end)
7998 {
7999 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
8000 p += 4;
8001 }
8002 }
8003
8004 /* Return true if symbol is defined statically. */
8005
8006 static bfd_boolean
8007 is_static_defined (struct elf_link_hash_entry *h)
8008 {
8009 return ((h->root.type == bfd_link_hash_defined
8010 || h->root.type == bfd_link_hash_defweak)
8011 && h->root.u.def.section != NULL
8012 && h->root.u.def.section->output_section != NULL);
8013 }
8014
8015 /* If INSN is an opcode that may be used with an @tls operand, return
8016 the transformed insn for TLS optimisation, otherwise return 0. If
8017 REG is non-zero only match an insn with RB or RA equal to REG. */
8018
8019 unsigned int
8020 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
8021 {
8022 unsigned int rtra;
8023
8024 if ((insn & (0x3f << 26)) != 31 << 26)
8025 return 0;
8026
8027 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
8028 rtra = insn & ((1 << 26) - (1 << 16));
8029 else if (((insn >> 16) & 0x1f) == reg)
8030 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
8031 else
8032 return 0;
8033
8034 if ((insn & (0x3ff << 1)) == 266 << 1)
8035 /* add -> addi. */
8036 insn = 14 << 26;
8037 else if ((insn & (0x1f << 1)) == 23 << 1
8038 && ((insn & (0x1f << 6)) < 14 << 6
8039 || ((insn & (0x1f << 6)) >= 16 << 6
8040 && (insn & (0x1f << 6)) < 24 << 6)))
8041 /* load and store indexed -> dform. */
8042 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
8043 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
8044 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
8045 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
8046 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
8047 /* lwax -> lwa. */
8048 insn = (58 << 26) | 2;
8049 else
8050 return 0;
8051 insn |= rtra;
8052 return insn;
8053 }
8054
8055 /* If INSN is an opcode that may be used with an @tprel operand, return
8056 the transformed insn for an undefined weak symbol, ie. with the
8057 thread pointer REG operand removed. Otherwise return 0. */
8058
8059 unsigned int
8060 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
8061 {
8062 if ((insn & (0x1f << 16)) == reg << 16
8063 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8064 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
8065 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8066 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8067 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8068 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8069 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8070 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8071 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8072 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8073 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8074 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8075 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8076 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8077 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8078 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8079 && (insn & 3) != 1)
8080 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8081 && ((insn & 3) == 0 || (insn & 3) == 3))))
8082 {
8083 insn &= ~(0x1f << 16);
8084 }
8085 else if ((insn & (0x1f << 21)) == reg << 21
8086 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
8087 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
8088 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
8089 {
8090 insn &= ~(0x1f << 21);
8091 insn |= (insn & (0x1f << 16)) << 5;
8092 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
8093 insn -= 2 >> 26; /* convert to ori,oris */
8094 }
8095 else
8096 insn = 0;
8097 return insn;
8098 }
8099
8100 static bfd_boolean
8101 is_insn_ds_form (unsigned int insn)
8102 {
8103 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
8104 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
8105 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
8106 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
8107 }
8108
8109 static bfd_boolean
8110 is_insn_dq_form (unsigned int insn)
8111 {
8112 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
8113 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
8114 && (insn & 3) == 1));
8115 }
8116
8117 /* The RELOCATE_SECTION function is called by the ELF backend linker
8118 to handle the relocations for a section.
8119
8120 The relocs are always passed as Rela structures; if the section
8121 actually uses Rel structures, the r_addend field will always be
8122 zero.
8123
8124 This function is responsible for adjust the section contents as
8125 necessary, and (if using Rela relocs and generating a
8126 relocatable output file) adjusting the reloc addend as
8127 necessary.
8128
8129 This function does not have to worry about setting the reloc
8130 address or the reloc symbol index.
8131
8132 LOCAL_SYMS is a pointer to the swapped in local symbols.
8133
8134 LOCAL_SECTIONS is an array giving the section in the input file
8135 corresponding to the st_shndx field of each local symbol.
8136
8137 The global hash table entry for the global symbols can be found
8138 via elf_sym_hashes (input_bfd).
8139
8140 When generating relocatable output, this function must handle
8141 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
8142 going to be the section symbol corresponding to the output
8143 section, which means that the addend must be adjusted
8144 accordingly. */
8145
8146 static bfd_boolean
8147 ppc_elf_relocate_section (bfd *output_bfd,
8148 struct bfd_link_info *info,
8149 bfd *input_bfd,
8150 asection *input_section,
8151 bfd_byte *contents,
8152 Elf_Internal_Rela *relocs,
8153 Elf_Internal_Sym *local_syms,
8154 asection **local_sections)
8155 {
8156 Elf_Internal_Shdr *symtab_hdr;
8157 struct elf_link_hash_entry **sym_hashes;
8158 struct ppc_elf_link_hash_table *htab;
8159 Elf_Internal_Rela *rel;
8160 Elf_Internal_Rela *wrel;
8161 Elf_Internal_Rela *relend;
8162 Elf_Internal_Rela outrel;
8163 asection *got2;
8164 bfd_vma *local_got_offsets;
8165 bfd_boolean ret = TRUE;
8166 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
8167 bfd_boolean is_vxworks_tls;
8168 unsigned int picfixup_size = 0;
8169 struct ppc_elf_relax_info *relax_info = NULL;
8170
8171 #ifdef DEBUG
8172 _bfd_error_handler ("ppc_elf_relocate_section called for %pB section %pA, "
8173 "%ld relocations%s",
8174 input_bfd, input_section,
8175 (long) input_section->reloc_count,
8176 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
8177 #endif
8178
8179 got2 = bfd_get_section_by_name (input_bfd, ".got2");
8180
8181 /* Initialize howto table if not already done. */
8182 if (!ppc_elf_howto_table[R_PPC_ADDR32])
8183 ppc_elf_howto_init ();
8184
8185 htab = ppc_elf_hash_table (info);
8186 local_got_offsets = elf_local_got_offsets (input_bfd);
8187 symtab_hdr = &elf_symtab_hdr (input_bfd);
8188 sym_hashes = elf_sym_hashes (input_bfd);
8189 /* We have to handle relocations in vxworks .tls_vars sections
8190 specially, because the dynamic loader is 'weird'. */
8191 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
8192 && !strcmp (input_section->output_section->name,
8193 ".tls_vars"));
8194 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
8195 relax_info = elf_section_data (input_section)->sec_info;
8196 rel = wrel = relocs;
8197 relend = relocs + input_section->reloc_count;
8198 for (; rel < relend; wrel++, rel++)
8199 {
8200 enum elf_ppc_reloc_type r_type;
8201 bfd_vma addend;
8202 bfd_reloc_status_type r;
8203 Elf_Internal_Sym *sym;
8204 asection *sec;
8205 struct elf_link_hash_entry *h;
8206 const char *sym_name;
8207 reloc_howto_type *howto;
8208 unsigned long r_symndx;
8209 bfd_vma relocation;
8210 bfd_vma branch_bit, from;
8211 bfd_boolean unresolved_reloc, save_unresolved_reloc;
8212 bfd_boolean warned;
8213 unsigned int tls_type, tls_mask, tls_gd;
8214 struct plt_entry **ifunc, **plt_list;
8215 struct reloc_howto_struct alt_howto;
8216
8217 again:
8218 r_type = ELF32_R_TYPE (rel->r_info);
8219 sym = NULL;
8220 sec = NULL;
8221 h = NULL;
8222 unresolved_reloc = FALSE;
8223 warned = FALSE;
8224 r_symndx = ELF32_R_SYM (rel->r_info);
8225
8226 if (r_symndx < symtab_hdr->sh_info)
8227 {
8228 sym = local_syms + r_symndx;
8229 sec = local_sections[r_symndx];
8230 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
8231
8232 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
8233 }
8234 else
8235 {
8236 bfd_boolean ignored;
8237
8238 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
8239 r_symndx, symtab_hdr, sym_hashes,
8240 h, sec, relocation,
8241 unresolved_reloc, warned, ignored);
8242
8243 sym_name = h->root.root.string;
8244 }
8245
8246 if (sec != NULL && discarded_section (sec))
8247 {
8248 /* For relocs against symbols from removed linkonce sections,
8249 or sections discarded by a linker script, we just want the
8250 section contents zeroed. Avoid any special processing. */
8251 howto = NULL;
8252 if (r_type < R_PPC_max)
8253 howto = ppc_elf_howto_table[r_type];
8254
8255 _bfd_clear_contents (howto, input_bfd, input_section,
8256 contents + rel->r_offset);
8257 wrel->r_offset = rel->r_offset;
8258 wrel->r_info = 0;
8259 wrel->r_addend = 0;
8260
8261 /* For ld -r, remove relocations in debug sections against
8262 symbols defined in discarded sections. Not done for
8263 non-debug to preserve relocs in .eh_frame which the
8264 eh_frame editing code expects to be present. */
8265 if (bfd_link_relocatable (info)
8266 && (input_section->flags & SEC_DEBUGGING))
8267 wrel--;
8268
8269 continue;
8270 }
8271
8272 if (bfd_link_relocatable (info))
8273 {
8274 if (got2 != NULL
8275 && r_type == R_PPC_PLTREL24
8276 && rel->r_addend != 0)
8277 {
8278 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8279 addend specifies the GOT pointer offset within .got2. */
8280 rel->r_addend += got2->output_offset;
8281 }
8282 if (r_type != R_PPC_RELAX_PLT
8283 && r_type != R_PPC_RELAX_PLTREL24
8284 && r_type != R_PPC_RELAX)
8285 goto copy_reloc;
8286 }
8287
8288 /* TLS optimizations. Replace instruction sequences and relocs
8289 based on information we collected in tls_optimize. We edit
8290 RELOCS so that --emit-relocs will output something sensible
8291 for the final instruction stream. */
8292 tls_mask = 0;
8293 tls_gd = 0;
8294 if (h != NULL)
8295 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
8296 else if (local_got_offsets != NULL)
8297 {
8298 struct plt_entry **local_plt;
8299 char *lgot_masks;
8300 local_plt
8301 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
8302 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
8303 tls_mask = lgot_masks[r_symndx];
8304 }
8305
8306 /* Ensure reloc mapping code below stays sane. */
8307 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
8308 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
8309 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
8310 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
8311 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
8312 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
8313 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
8314 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
8315 abort ();
8316 switch (r_type)
8317 {
8318 default:
8319 break;
8320
8321 case R_PPC_GOT_TPREL16:
8322 case R_PPC_GOT_TPREL16_LO:
8323 if ((tls_mask & TLS_TLS) != 0
8324 && (tls_mask & TLS_TPREL) == 0)
8325 {
8326 bfd_vma insn;
8327
8328 insn = bfd_get_32 (input_bfd,
8329 contents + rel->r_offset - d_offset);
8330 insn &= 31 << 21;
8331 insn |= 0x3c020000; /* addis 0,2,0 */
8332 bfd_put_32 (input_bfd, insn,
8333 contents + rel->r_offset - d_offset);
8334 r_type = R_PPC_TPREL16_HA;
8335 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8336 }
8337 break;
8338
8339 case R_PPC_TLS:
8340 if ((tls_mask & TLS_TLS) != 0
8341 && (tls_mask & TLS_TPREL) == 0)
8342 {
8343 bfd_vma insn;
8344
8345 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8346 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
8347 if (insn == 0)
8348 abort ();
8349 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8350 r_type = R_PPC_TPREL16_LO;
8351 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8352
8353 /* Was PPC_TLS which sits on insn boundary, now
8354 PPC_TPREL16_LO which is at low-order half-word. */
8355 rel->r_offset += d_offset;
8356 }
8357 break;
8358
8359 case R_PPC_GOT_TLSGD16_HI:
8360 case R_PPC_GOT_TLSGD16_HA:
8361 tls_gd = TLS_TPRELGD;
8362 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8363 goto tls_gdld_hi;
8364 break;
8365
8366 case R_PPC_GOT_TLSLD16_HI:
8367 case R_PPC_GOT_TLSLD16_HA:
8368 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8369 {
8370 tls_gdld_hi:
8371 if ((tls_mask & tls_gd) != 0)
8372 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8373 + R_PPC_GOT_TPREL16);
8374 else
8375 {
8376 rel->r_offset -= d_offset;
8377 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8378 r_type = R_PPC_NONE;
8379 }
8380 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8381 }
8382 break;
8383
8384 case R_PPC_GOT_TLSGD16:
8385 case R_PPC_GOT_TLSGD16_LO:
8386 tls_gd = TLS_TPRELGD;
8387 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8388 goto tls_ldgd_opt;
8389 break;
8390
8391 case R_PPC_GOT_TLSLD16:
8392 case R_PPC_GOT_TLSLD16_LO:
8393 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8394 {
8395 unsigned int insn1, insn2;
8396 bfd_vma offset;
8397
8398 tls_ldgd_opt:
8399 offset = (bfd_vma) -1;
8400 /* If not using the newer R_PPC_TLSGD/LD to mark
8401 __tls_get_addr calls, we must trust that the call
8402 stays with its arg setup insns, ie. that the next
8403 reloc is the __tls_get_addr call associated with
8404 the current reloc. Edit both insns. */
8405 if (input_section->has_tls_get_addr_call
8406 && rel + 1 < relend
8407 && branch_reloc_hash_match (input_bfd, rel + 1,
8408 htab->tls_get_addr))
8409 offset = rel[1].r_offset;
8410 /* We read the low GOT_TLS insn because we need to keep
8411 the destination reg. It may be something other than
8412 the usual r3, and moved to r3 before the call by
8413 intervening code. */
8414 insn1 = bfd_get_32 (input_bfd,
8415 contents + rel->r_offset - d_offset);
8416 if ((tls_mask & tls_gd) != 0)
8417 {
8418 /* IE */
8419 insn1 &= (0x1f << 21) | (0x1f << 16);
8420 insn1 |= 32 << 26; /* lwz */
8421 if (offset != (bfd_vma) -1)
8422 {
8423 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8424 insn2 = 0x7c631214; /* add 3,3,2 */
8425 bfd_put_32 (input_bfd, insn2, contents + offset);
8426 }
8427 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8428 + R_PPC_GOT_TPREL16);
8429 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8430 }
8431 else
8432 {
8433 /* LE */
8434 insn1 &= 0x1f << 21;
8435 insn1 |= 0x3c020000; /* addis r,2,0 */
8436 if (tls_gd == 0)
8437 {
8438 /* Was an LD reloc. */
8439 for (r_symndx = 0;
8440 r_symndx < symtab_hdr->sh_info;
8441 r_symndx++)
8442 if (local_sections[r_symndx] == sec)
8443 break;
8444 if (r_symndx >= symtab_hdr->sh_info)
8445 r_symndx = STN_UNDEF;
8446 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8447 if (r_symndx != STN_UNDEF)
8448 rel->r_addend -= (local_syms[r_symndx].st_value
8449 + sec->output_offset
8450 + sec->output_section->vma);
8451 }
8452 r_type = R_PPC_TPREL16_HA;
8453 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8454 if (offset != (bfd_vma) -1)
8455 {
8456 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8457 rel[1].r_offset = offset + d_offset;
8458 rel[1].r_addend = rel->r_addend;
8459 insn2 = 0x38630000; /* addi 3,3,0 */
8460 bfd_put_32 (input_bfd, insn2, contents + offset);
8461 }
8462 }
8463 bfd_put_32 (input_bfd, insn1,
8464 contents + rel->r_offset - d_offset);
8465 if (tls_gd == 0)
8466 {
8467 /* We changed the symbol on an LD reloc. Start over
8468 in order to get h, sym, sec etc. right. */
8469 goto again;
8470 }
8471 }
8472 break;
8473
8474 case R_PPC_TLSGD:
8475 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
8476 && rel + 1 < relend)
8477 {
8478 unsigned int insn2;
8479 bfd_vma offset = rel->r_offset;
8480
8481 if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
8482 {
8483 bfd_put_32 (input_bfd, NOP, contents + offset);
8484 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8485 break;
8486 }
8487
8488 if ((tls_mask & TLS_TPRELGD) != 0)
8489 {
8490 /* IE */
8491 r_type = R_PPC_NONE;
8492 insn2 = 0x7c631214; /* add 3,3,2 */
8493 }
8494 else
8495 {
8496 /* LE */
8497 r_type = R_PPC_TPREL16_LO;
8498 rel->r_offset += d_offset;
8499 insn2 = 0x38630000; /* addi 3,3,0 */
8500 }
8501 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8502 bfd_put_32 (input_bfd, insn2, contents + offset);
8503 /* Zap the reloc on the _tls_get_addr call too. */
8504 BFD_ASSERT (offset == rel[1].r_offset);
8505 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8506 }
8507 break;
8508
8509 case R_PPC_TLSLD:
8510 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
8511 && rel + 1 < relend)
8512 {
8513 unsigned int insn2;
8514
8515 if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info)))
8516 {
8517 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8518 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8519 break;
8520 }
8521
8522 for (r_symndx = 0;
8523 r_symndx < symtab_hdr->sh_info;
8524 r_symndx++)
8525 if (local_sections[r_symndx] == sec)
8526 break;
8527 if (r_symndx >= symtab_hdr->sh_info)
8528 r_symndx = STN_UNDEF;
8529 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8530 if (r_symndx != STN_UNDEF)
8531 rel->r_addend -= (local_syms[r_symndx].st_value
8532 + sec->output_offset
8533 + sec->output_section->vma);
8534
8535 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8536 rel->r_offset += d_offset;
8537 insn2 = 0x38630000; /* addi 3,3,0 */
8538 bfd_put_32 (input_bfd, insn2,
8539 contents + rel->r_offset - d_offset);
8540 /* Zap the reloc on the _tls_get_addr call too. */
8541 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8542 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8543 goto again;
8544 }
8545 break;
8546 }
8547
8548 /* Handle other relocations that tweak non-addend part of insn. */
8549 branch_bit = 0;
8550 switch (r_type)
8551 {
8552 default:
8553 break;
8554
8555 /* Branch taken prediction relocations. */
8556 case R_PPC_ADDR14_BRTAKEN:
8557 case R_PPC_REL14_BRTAKEN:
8558 branch_bit = BRANCH_PREDICT_BIT;
8559 /* Fall through. */
8560
8561 /* Branch not taken prediction relocations. */
8562 case R_PPC_ADDR14_BRNTAKEN:
8563 case R_PPC_REL14_BRNTAKEN:
8564 {
8565 unsigned int insn;
8566
8567 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8568 insn &= ~BRANCH_PREDICT_BIT;
8569 insn |= branch_bit;
8570
8571 from = (rel->r_offset
8572 + input_section->output_offset
8573 + input_section->output_section->vma);
8574
8575 /* Invert 'y' bit if not the default. */
8576 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8577 insn ^= BRANCH_PREDICT_BIT;
8578
8579 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8580 }
8581 break;
8582
8583 case R_PPC_PLT16_HA:
8584 {
8585 unsigned int insn;
8586
8587 insn = bfd_get_32 (input_bfd,
8588 contents + rel->r_offset - d_offset);
8589 if ((insn & (0x3f << 26)) == 15u << 26
8590 && (insn & (0x1f << 16)) != 0)
8591 {
8592 if (!bfd_link_pic (info))
8593 {
8594 /* Convert addis to lis. */
8595 insn &= ~(0x1f << 16);
8596 bfd_put_32 (input_bfd, insn,
8597 contents + rel->r_offset - d_offset);
8598 }
8599 }
8600 else if (bfd_link_pic (info))
8601 info->callbacks->einfo
8602 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8603 input_bfd, input_section, rel->r_offset,
8604 "R_PPC_PLT16_HA", insn);
8605 }
8606 break;
8607 }
8608
8609 if (ELIMINATE_COPY_RELOCS
8610 && h != NULL
8611 && !h->def_regular
8612 && h->protected_def
8613 && ppc_elf_hash_entry (h)->has_addr16_ha
8614 && ppc_elf_hash_entry (h)->has_addr16_lo
8615 && htab->params->pic_fixup > 0)
8616 {
8617 /* Convert lis;addi or lis;load/store accessing a protected
8618 variable defined in a shared library to PIC. */
8619 unsigned int insn;
8620
8621 if (r_type == R_PPC_ADDR16_HA)
8622 {
8623 insn = bfd_get_32 (input_bfd,
8624 contents + rel->r_offset - d_offset);
8625 if ((insn & (0x3f << 26)) == (15u << 26)
8626 && (insn & (0x1f << 16)) == 0 /* lis */)
8627 {
8628 bfd_byte *p;
8629 bfd_vma off;
8630 bfd_vma got_addr;
8631
8632 p = (contents + input_section->size
8633 - relax_info->workaround_size
8634 - relax_info->picfixup_size
8635 + picfixup_size);
8636 off = (p - contents) - (rel->r_offset - d_offset);
8637 if (off > 0x1fffffc || (off & 3) != 0)
8638 info->callbacks->einfo
8639 (_("%H: fixup branch overflow\n"),
8640 input_bfd, input_section, rel->r_offset);
8641
8642 bfd_put_32 (input_bfd, B | off,
8643 contents + rel->r_offset - d_offset);
8644 got_addr = (htab->elf.sgot->output_section->vma
8645 + htab->elf.sgot->output_offset
8646 + (h->got.offset & ~1));
8647 wrel->r_offset = (p - contents) + d_offset;
8648 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8649 wrel->r_addend = got_addr;
8650 insn &= ~0xffff;
8651 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8652 bfd_put_32 (input_bfd, insn, p);
8653
8654 /* Convert lis to lwz, loading address from GOT. */
8655 insn &= ~0xffff;
8656 insn ^= (32u ^ 15u) << 26;
8657 insn |= (insn & (0x1f << 21)) >> 5;
8658 insn |= got_addr & 0xffff;
8659 bfd_put_32 (input_bfd, insn, p + 4);
8660
8661 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8662 picfixup_size += 12;
8663
8664 /* Use one of the spare relocs, so --emit-relocs
8665 output is reasonable. */
8666 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8667 wrel++, rel++;
8668 rel->r_offset = wrel[-1].r_offset + 4;
8669 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8670 rel->r_addend = wrel[-1].r_addend;
8671
8672 /* Continue on as if we had a got reloc, to output
8673 dynamic reloc. */
8674 r_type = R_PPC_GOT16_LO;
8675 }
8676 else
8677 _bfd_error_handler
8678 /* xgettext:c-format */
8679 (_("%pB(%pA+%#" PRIx64 "): error: "
8680 "%s with unexpected instruction %#x"),
8681 input_bfd, input_section, (uint64_t) rel->r_offset,
8682 "R_PPC_ADDR16_HA", insn);
8683 }
8684 else if (r_type == R_PPC_ADDR16_LO)
8685 {
8686 insn = bfd_get_32 (input_bfd,
8687 contents + rel->r_offset - d_offset);
8688 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8689 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8690 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8691 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8692 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8693 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8694 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8695 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8696 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8697 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8698 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8699 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8700 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8701 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8702 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8703 && (insn & 3) != 1)
8704 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8705 && ((insn & 3) == 0 || (insn & 3) == 3)))
8706 {
8707 /* Arrange to apply the reloc addend, if any. */
8708 relocation = 0;
8709 unresolved_reloc = FALSE;
8710 rel->r_info = ELF32_R_INFO (0, r_type);
8711 }
8712 else
8713 _bfd_error_handler
8714 /* xgettext:c-format */
8715 (_("%pB(%pA+%#" PRIx64 "): error: "
8716 "%s with unexpected instruction %#x"),
8717 input_bfd, input_section, (uint64_t) rel->r_offset,
8718 "R_PPC_ADDR16_LO", insn);
8719 }
8720 }
8721
8722 ifunc = NULL;
8723 if (!htab->is_vxworks)
8724 {
8725 struct plt_entry *ent;
8726
8727 if (h != NULL)
8728 {
8729 if (h->type == STT_GNU_IFUNC)
8730 ifunc = &h->plt.plist;
8731 }
8732 else if (local_got_offsets != NULL
8733 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8734 {
8735 struct plt_entry **local_plt;
8736
8737 local_plt = (struct plt_entry **) (local_got_offsets
8738 + symtab_hdr->sh_info);
8739 ifunc = local_plt + r_symndx;
8740 }
8741
8742 ent = NULL;
8743 if (ifunc != NULL
8744 && (!bfd_link_pic (info)
8745 || is_branch_reloc (r_type)
8746 || r_type == R_PPC_PLT16_LO
8747 || r_type == R_PPC_PLT16_HI
8748 || r_type == R_PPC_PLT16_HA))
8749 {
8750 addend = 0;
8751 if (bfd_link_pic (info)
8752 && (r_type == R_PPC_PLTREL24
8753 || r_type == R_PPC_PLT16_LO
8754 || r_type == R_PPC_PLT16_HI
8755 || r_type == R_PPC_PLT16_HA))
8756 addend = rel->r_addend;
8757 ent = find_plt_ent (ifunc, got2, addend);
8758 }
8759 if (ent != NULL)
8760 {
8761 if (bfd_link_pic (info)
8762 && ent->sec != got2
8763 && htab->plt_type != PLT_NEW
8764 && (!htab->elf.dynamic_sections_created
8765 || h == NULL
8766 || h->dynindx == -1))
8767 {
8768 /* Uh oh, we are going to create a pic glink stub
8769 for an ifunc (here for h == NULL and later in
8770 finish_dynamic_symbol for h != NULL), and
8771 apparently are using code compiled with
8772 -mbss-plt. The difficulty is that -mbss-plt code
8773 gives no indication via a magic PLTREL24 addend
8774 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8775 is pointing into a .got2 section (and how far
8776 into .got2). */
8777 info->callbacks->einfo
8778 /* xgettext:c-format */
8779 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8780 input_bfd, input_section, rel->r_offset, sym_name);
8781 }
8782
8783 unresolved_reloc = FALSE;
8784 if (htab->plt_type == PLT_NEW
8785 || !htab->elf.dynamic_sections_created
8786 || h == NULL
8787 || h->dynindx == -1)
8788 relocation = (htab->glink->output_section->vma
8789 + htab->glink->output_offset
8790 + (ent->glink_offset & ~1));
8791 else
8792 relocation = (htab->elf.splt->output_section->vma
8793 + htab->elf.splt->output_offset
8794 + ent->plt.offset);
8795 }
8796 }
8797
8798 addend = rel->r_addend;
8799 save_unresolved_reloc = unresolved_reloc;
8800 howto = NULL;
8801 if (r_type < R_PPC_max)
8802 howto = ppc_elf_howto_table[r_type];
8803
8804 switch (r_type)
8805 {
8806 default:
8807 break;
8808
8809 case R_PPC_TPREL16_HA:
8810 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8811 {
8812 bfd_byte *p = contents + (rel->r_offset & ~3);
8813 unsigned int insn = bfd_get_32 (input_bfd, p);
8814 if ((insn & ((0x3f << 26) | 0x1f << 16))
8815 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8816 /* xgettext:c-format */
8817 info->callbacks->minfo
8818 (_("%H: warning: %s unexpected insn %#x.\n"),
8819 input_bfd, input_section, rel->r_offset, howto->name, insn);
8820 else
8821 bfd_put_32 (input_bfd, NOP, p);
8822 }
8823 break;
8824
8825 case R_PPC_TPREL16_LO:
8826 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8827 {
8828 bfd_byte *p = contents + (rel->r_offset & ~3);
8829 unsigned int insn = bfd_get_32 (input_bfd, p);
8830 insn &= ~(0x1f << 16);
8831 insn |= 2 << 16;
8832 bfd_put_32 (input_bfd, insn, p);
8833 }
8834 break;
8835 }
8836
8837 tls_type = 0;
8838 switch (r_type)
8839 {
8840 default:
8841 /* xgettext:c-format */
8842 _bfd_error_handler (_("%pB: %s unsupported"),
8843 input_bfd, howto->name);
8844
8845 bfd_set_error (bfd_error_bad_value);
8846 ret = FALSE;
8847 goto copy_reloc;
8848
8849 case R_PPC_NONE:
8850 case R_PPC_TLS:
8851 case R_PPC_TLSGD:
8852 case R_PPC_TLSLD:
8853 case R_PPC_EMB_MRKREF:
8854 case R_PPC_GNU_VTINHERIT:
8855 case R_PPC_GNU_VTENTRY:
8856 goto copy_reloc;
8857
8858 /* GOT16 relocations. Like an ADDR16 using the symbol's
8859 address in the GOT as relocation value instead of the
8860 symbol's value itself. Also, create a GOT entry for the
8861 symbol and put the symbol value there. */
8862 case R_PPC_GOT_TLSGD16:
8863 case R_PPC_GOT_TLSGD16_LO:
8864 case R_PPC_GOT_TLSGD16_HI:
8865 case R_PPC_GOT_TLSGD16_HA:
8866 tls_type = TLS_TLS | TLS_GD;
8867 goto dogot;
8868
8869 case R_PPC_GOT_TLSLD16:
8870 case R_PPC_GOT_TLSLD16_LO:
8871 case R_PPC_GOT_TLSLD16_HI:
8872 case R_PPC_GOT_TLSLD16_HA:
8873 tls_type = TLS_TLS | TLS_LD;
8874 goto dogot;
8875
8876 case R_PPC_GOT_TPREL16:
8877 case R_PPC_GOT_TPREL16_LO:
8878 case R_PPC_GOT_TPREL16_HI:
8879 case R_PPC_GOT_TPREL16_HA:
8880 tls_type = TLS_TLS | TLS_TPREL;
8881 goto dogot;
8882
8883 case R_PPC_GOT_DTPREL16:
8884 case R_PPC_GOT_DTPREL16_LO:
8885 case R_PPC_GOT_DTPREL16_HI:
8886 case R_PPC_GOT_DTPREL16_HA:
8887 tls_type = TLS_TLS | TLS_DTPREL;
8888 goto dogot;
8889
8890 case R_PPC_GOT16:
8891 case R_PPC_GOT16_LO:
8892 case R_PPC_GOT16_HI:
8893 case R_PPC_GOT16_HA:
8894 tls_mask = 0;
8895 dogot:
8896 {
8897 /* Relocation is to the entry for this symbol in the global
8898 offset table. */
8899 bfd_vma off;
8900 bfd_vma *offp;
8901 unsigned long indx;
8902
8903 if (htab->elf.sgot == NULL)
8904 abort ();
8905
8906 indx = 0;
8907 if (tls_type == (TLS_TLS | TLS_LD)
8908 && (h == NULL
8909 || !h->def_dynamic))
8910 offp = &htab->tlsld_got.offset;
8911 else if (h != NULL)
8912 {
8913 if (!htab->elf.dynamic_sections_created
8914 || h->dynindx == -1
8915 || SYMBOL_REFERENCES_LOCAL (info, h)
8916 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8917 /* This is actually a static link, or it is a
8918 -Bsymbolic link and the symbol is defined
8919 locally, or the symbol was forced to be local
8920 because of a version file. */
8921 ;
8922 else
8923 {
8924 indx = h->dynindx;
8925 unresolved_reloc = FALSE;
8926 }
8927 offp = &h->got.offset;
8928 }
8929 else
8930 {
8931 if (local_got_offsets == NULL)
8932 abort ();
8933 offp = &local_got_offsets[r_symndx];
8934 }
8935
8936 /* The offset must always be a multiple of 4. We use the
8937 least significant bit to record whether we have already
8938 processed this entry. */
8939 off = *offp;
8940 if ((off & 1) != 0)
8941 off &= ~1;
8942 else
8943 {
8944 unsigned int tls_m = ((tls_mask & TLS_TLS) != 0
8945 ? tls_mask & (TLS_LD | TLS_GD | TLS_DTPREL
8946 | TLS_TPREL | TLS_TPRELGD)
8947 : 0);
8948
8949 if (offp == &htab->tlsld_got.offset)
8950 tls_m = TLS_LD;
8951 else if (h == NULL
8952 || !h->def_dynamic)
8953 tls_m &= ~TLS_LD;
8954
8955 /* We might have multiple got entries for this sym.
8956 Initialize them all. */
8957 do
8958 {
8959 int tls_ty = 0;
8960
8961 if ((tls_m & TLS_LD) != 0)
8962 {
8963 tls_ty = TLS_TLS | TLS_LD;
8964 tls_m &= ~TLS_LD;
8965 }
8966 else if ((tls_m & TLS_GD) != 0)
8967 {
8968 tls_ty = TLS_TLS | TLS_GD;
8969 tls_m &= ~TLS_GD;
8970 }
8971 else if ((tls_m & TLS_DTPREL) != 0)
8972 {
8973 tls_ty = TLS_TLS | TLS_DTPREL;
8974 tls_m &= ~TLS_DTPREL;
8975 }
8976 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8977 {
8978 tls_ty = TLS_TLS | TLS_TPREL;
8979 tls_m = 0;
8980 }
8981
8982 /* Generate relocs for the dynamic linker. */
8983 if (indx != 0
8984 || (bfd_link_pic (info)
8985 && (h == NULL
8986 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8987 || offp == &htab->tlsld_got.offset)
8988 && !(tls_ty == (TLS_TLS | TLS_TPREL)
8989 && bfd_link_executable (info)
8990 && SYMBOL_REFERENCES_LOCAL (info, h))))
8991 {
8992 asection *rsec = htab->elf.srelgot;
8993 bfd_byte * loc;
8994
8995 if (ifunc != NULL)
8996 {
8997 rsec = htab->elf.irelplt;
8998 if (indx == 0)
8999 htab->local_ifunc_resolver = 1;
9000 else if (is_static_defined (h))
9001 htab->maybe_local_ifunc_resolver = 1;
9002 }
9003 outrel.r_offset = (htab->elf.sgot->output_section->vma
9004 + htab->elf.sgot->output_offset
9005 + off);
9006 outrel.r_addend = 0;
9007 if (tls_ty & (TLS_LD | TLS_GD))
9008 {
9009 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
9010 if (tls_ty == (TLS_TLS | TLS_GD))
9011 {
9012 loc = rsec->contents;
9013 loc += (rsec->reloc_count++
9014 * sizeof (Elf32_External_Rela));
9015 bfd_elf32_swap_reloca_out (output_bfd,
9016 &outrel, loc);
9017 outrel.r_offset += 4;
9018 outrel.r_info
9019 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
9020 }
9021 }
9022 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
9023 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
9024 else if (tls_ty == (TLS_TLS | TLS_TPREL))
9025 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
9026 else if (indx != 0)
9027 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
9028 else if (ifunc != NULL)
9029 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9030 else
9031 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9032 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
9033 {
9034 outrel.r_addend += relocation;
9035 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
9036 {
9037 if (htab->elf.tls_sec == NULL)
9038 outrel.r_addend = 0;
9039 else
9040 outrel.r_addend -= htab->elf.tls_sec->vma;
9041 }
9042 }
9043 loc = rsec->contents;
9044 loc += (rsec->reloc_count++
9045 * sizeof (Elf32_External_Rela));
9046 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9047 }
9048
9049 /* Init the .got section contents if we're not
9050 emitting a reloc. */
9051 else
9052 {
9053 bfd_vma value = relocation;
9054
9055 if (tls_ty != 0)
9056 {
9057 if (htab->elf.tls_sec == NULL)
9058 value = 0;
9059 else
9060 {
9061 if (tls_ty & TLS_LD)
9062 value = 0;
9063 else
9064 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
9065 if (tls_ty & TLS_TPREL)
9066 value += DTP_OFFSET - TP_OFFSET;
9067 }
9068
9069 if (tls_ty & (TLS_LD | TLS_GD))
9070 {
9071 bfd_put_32 (input_bfd, value,
9072 htab->elf.sgot->contents + off + 4);
9073 value = 1;
9074 }
9075 }
9076 bfd_put_32 (input_bfd, value,
9077 htab->elf.sgot->contents + off);
9078 }
9079
9080 off += 4;
9081 if (tls_ty & (TLS_LD | TLS_GD))
9082 off += 4;
9083 }
9084 while (tls_m != 0);
9085
9086 off = *offp;
9087 *offp = off | 1;
9088 }
9089
9090 if (off >= (bfd_vma) -2)
9091 abort ();
9092
9093 if ((tls_type & TLS_TLS) != 0)
9094 {
9095 if (tls_type != (TLS_TLS | TLS_LD))
9096 {
9097 if ((tls_mask & TLS_LD) != 0
9098 && !(h == NULL
9099 || !h->def_dynamic))
9100 off += 8;
9101 if (tls_type != (TLS_TLS | TLS_GD))
9102 {
9103 if ((tls_mask & TLS_GD) != 0)
9104 off += 8;
9105 if (tls_type != (TLS_TLS | TLS_DTPREL))
9106 {
9107 if ((tls_mask & TLS_DTPREL) != 0)
9108 off += 4;
9109 }
9110 }
9111 }
9112 }
9113
9114 /* If here for a picfixup, we're done. */
9115 if (r_type != ELF32_R_TYPE (rel->r_info))
9116 goto copy_reloc;
9117
9118 relocation = (htab->elf.sgot->output_section->vma
9119 + htab->elf.sgot->output_offset
9120 + off
9121 - SYM_VAL (htab->elf.hgot));
9122
9123 /* Addends on got relocations don't make much sense.
9124 x+off@got is actually x@got+off, and since the got is
9125 generated by a hash table traversal, the value in the
9126 got at entry m+n bears little relation to the entry m. */
9127 if (addend != 0)
9128 info->callbacks->einfo
9129 /* xgettext:c-format */
9130 (_("%H: non-zero addend on %s reloc against `%s'\n"),
9131 input_bfd, input_section, rel->r_offset,
9132 howto->name,
9133 sym_name);
9134 }
9135 break;
9136
9137 /* Relocations that need no special processing. */
9138 case R_PPC_LOCAL24PC:
9139 /* It makes no sense to point a local relocation
9140 at a symbol not in this object. */
9141 if (unresolved_reloc)
9142 {
9143 (*info->callbacks->undefined_symbol) (info,
9144 h->root.root.string,
9145 input_bfd,
9146 input_section,
9147 rel->r_offset,
9148 TRUE);
9149 goto copy_reloc;
9150 }
9151 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
9152 {
9153 /* @local on an ifunc does not really make sense since
9154 the ifunc resolver can take you anywhere. More
9155 seriously, calls to ifuncs must go through a plt call
9156 stub, and for pic the plt call stubs uses r30 to
9157 access the PLT. The problem is that a call that is
9158 local won't have the +32k reloc addend trick marking
9159 -fPIC code, so the linker won't know whether r30 is
9160 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
9161 /* xgettext:c-format */
9162 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
9163 input_bfd, input_section, rel->r_offset,
9164 h->root.root.string);
9165 }
9166 break;
9167
9168 case R_PPC_DTPREL16:
9169 case R_PPC_DTPREL16_LO:
9170 case R_PPC_DTPREL16_HI:
9171 case R_PPC_DTPREL16_HA:
9172 if (htab->elf.tls_sec != NULL)
9173 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9174 break;
9175
9176 /* Relocations that may need to be propagated if this is a shared
9177 object. */
9178 case R_PPC_TPREL16:
9179 case R_PPC_TPREL16_LO:
9180 case R_PPC_TPREL16_HI:
9181 case R_PPC_TPREL16_HA:
9182 if (h != NULL
9183 && h->root.type == bfd_link_hash_undefweak
9184 && h->dynindx == -1)
9185 {
9186 /* Make this relocation against an undefined weak symbol
9187 resolve to zero. This is really just a tweak, since
9188 code using weak externs ought to check that they are
9189 defined before using them. */
9190 bfd_byte *p = contents + rel->r_offset - d_offset;
9191 unsigned int insn = bfd_get_32 (input_bfd, p);
9192 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
9193 if (insn != 0)
9194 bfd_put_32 (input_bfd, insn, p);
9195 break;
9196 }
9197 if (htab->elf.tls_sec != NULL)
9198 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9199 /* The TPREL16 relocs shouldn't really be used in shared
9200 libs or with non-local symbols as that will result in
9201 DT_TEXTREL being set, but support them anyway. */
9202 goto dodyn;
9203
9204 case R_PPC_TPREL32:
9205 if (htab->elf.tls_sec != NULL)
9206 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
9207 goto dodyn;
9208
9209 case R_PPC_DTPREL32:
9210 if (htab->elf.tls_sec != NULL)
9211 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
9212 goto dodyn;
9213
9214 case R_PPC_DTPMOD32:
9215 relocation = 1;
9216 addend = 0;
9217 goto dodyn;
9218
9219 case R_PPC_REL16:
9220 case R_PPC_REL16_LO:
9221 case R_PPC_REL16_HI:
9222 case R_PPC_REL16_HA:
9223 case R_PPC_REL16DX_HA:
9224 break;
9225
9226 case R_PPC_REL32:
9227 if (h == NULL || h == htab->elf.hgot)
9228 break;
9229 /* fall through */
9230
9231 case R_PPC_ADDR32:
9232 case R_PPC_ADDR16:
9233 case R_PPC_ADDR16_LO:
9234 case R_PPC_ADDR16_HI:
9235 case R_PPC_ADDR16_HA:
9236 case R_PPC_UADDR32:
9237 case R_PPC_UADDR16:
9238 goto dodyn;
9239
9240 case R_PPC_VLE_REL8:
9241 case R_PPC_VLE_REL15:
9242 case R_PPC_VLE_REL24:
9243 case R_PPC_REL24:
9244 case R_PPC_REL14:
9245 case R_PPC_REL14_BRTAKEN:
9246 case R_PPC_REL14_BRNTAKEN:
9247 /* If these relocations are not to a named symbol, they can be
9248 handled right here, no need to bother the dynamic linker. */
9249 if (SYMBOL_CALLS_LOCAL (info, h)
9250 || h == htab->elf.hgot)
9251 break;
9252 /* fall through */
9253
9254 case R_PPC_ADDR24:
9255 case R_PPC_ADDR14:
9256 case R_PPC_ADDR14_BRTAKEN:
9257 case R_PPC_ADDR14_BRNTAKEN:
9258 if (h != NULL && !bfd_link_pic (info))
9259 break;
9260 /* fall through */
9261
9262 dodyn:
9263 if ((input_section->flags & SEC_ALLOC) == 0
9264 || is_vxworks_tls)
9265 break;
9266
9267 if (bfd_link_pic (info)
9268 ? ((h == NULL
9269 || ppc_elf_hash_entry (h)->dyn_relocs != NULL)
9270 && ((h != NULL && pc_dynrelocs (h))
9271 || must_be_dyn_reloc (info, r_type)))
9272 : (h != NULL
9273 && ppc_elf_hash_entry (h)->dyn_relocs != NULL))
9274 {
9275 int skip;
9276 bfd_byte *loc;
9277 asection *sreloc;
9278 long indx = 0;
9279
9280 #ifdef DEBUG
9281 fprintf (stderr, "ppc_elf_relocate_section needs to "
9282 "create relocation for %s\n",
9283 (h && h->root.root.string
9284 ? h->root.root.string : "<unknown>"));
9285 #endif
9286
9287 /* When generating a shared object, these relocations
9288 are copied into the output file to be resolved at run
9289 time. */
9290 skip = 0;
9291 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
9292 input_section,
9293 rel->r_offset);
9294 if (outrel.r_offset == (bfd_vma) -1
9295 || outrel.r_offset == (bfd_vma) -2)
9296 skip = (int) outrel.r_offset;
9297 outrel.r_offset += (input_section->output_section->vma
9298 + input_section->output_offset);
9299
9300 if (skip)
9301 memset (&outrel, 0, sizeof outrel);
9302 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
9303 {
9304 indx = h->dynindx;
9305 BFD_ASSERT (indx != -1);
9306 unresolved_reloc = FALSE;
9307 outrel.r_info = ELF32_R_INFO (indx, r_type);
9308 outrel.r_addend = rel->r_addend;
9309 }
9310 else
9311 {
9312 outrel.r_addend = relocation + rel->r_addend;
9313
9314 if (r_type != R_PPC_ADDR32)
9315 {
9316 if (ifunc != NULL)
9317 {
9318 /* If we get here when building a static
9319 executable, then the libc startup function
9320 responsible for applying indirect function
9321 relocations is going to complain about
9322 the reloc type.
9323 If we get here when building a dynamic
9324 executable, it will be because we have
9325 a text relocation. The dynamic loader
9326 will set the text segment writable and
9327 non-executable to apply text relocations.
9328 So we'll segfault when trying to run the
9329 indirection function to resolve the reloc. */
9330 info->callbacks->einfo
9331 /* xgettext:c-format */
9332 (_("%H: relocation %s for indirect "
9333 "function %s unsupported\n"),
9334 input_bfd, input_section, rel->r_offset,
9335 howto->name,
9336 sym_name);
9337 ret = FALSE;
9338 }
9339 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
9340 ;
9341 else if (sec == NULL || sec->owner == NULL)
9342 {
9343 bfd_set_error (bfd_error_bad_value);
9344 ret = FALSE;
9345 }
9346 else
9347 {
9348 asection *osec;
9349
9350 /* We are turning this relocation into one
9351 against a section symbol. It would be
9352 proper to subtract the symbol's value,
9353 osec->vma, from the emitted reloc addend,
9354 but ld.so expects buggy relocs.
9355 FIXME: Why not always use a zero index? */
9356 osec = sec->output_section;
9357 indx = elf_section_data (osec)->dynindx;
9358 if (indx == 0)
9359 {
9360 osec = htab->elf.text_index_section;
9361 indx = elf_section_data (osec)->dynindx;
9362 }
9363 BFD_ASSERT (indx != 0);
9364 #ifdef DEBUG
9365 if (indx == 0)
9366 printf ("indx=%ld section=%s flags=%08x name=%s\n",
9367 indx, osec->name, osec->flags,
9368 h->root.root.string);
9369 #endif
9370 }
9371
9372 outrel.r_info = ELF32_R_INFO (indx, r_type);
9373 }
9374 else if (ifunc != NULL)
9375 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9376 else
9377 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9378 }
9379
9380 sreloc = elf_section_data (input_section)->sreloc;
9381 if (ifunc)
9382 {
9383 sreloc = htab->elf.irelplt;
9384 if (indx == 0)
9385 htab->local_ifunc_resolver = 1;
9386 else if (is_static_defined (h))
9387 htab->maybe_local_ifunc_resolver = 1;
9388 }
9389 if (sreloc == NULL)
9390 return FALSE;
9391
9392 loc = sreloc->contents;
9393 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
9394 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9395
9396 if (skip == -1)
9397 goto copy_reloc;
9398
9399 /* This reloc will be computed at runtime. Clear the memory
9400 so that it contains a predictable value for prelink. */
9401 if (!skip)
9402 {
9403 relocation = howto->pc_relative ? outrel.r_offset : 0;
9404 addend = 0;
9405 break;
9406 }
9407 }
9408 break;
9409
9410 case R_PPC_RELAX_PLT:
9411 case R_PPC_RELAX_PLTREL24:
9412 if (h != NULL)
9413 {
9414 struct plt_entry *ent;
9415 bfd_vma got2_addend = 0;
9416
9417 if (r_type == R_PPC_RELAX_PLTREL24)
9418 {
9419 if (bfd_link_pic (info))
9420 got2_addend = addend;
9421 addend = 0;
9422 }
9423 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9424 if (htab->plt_type == PLT_NEW)
9425 relocation = (htab->glink->output_section->vma
9426 + htab->glink->output_offset
9427 + ent->glink_offset);
9428 else
9429 relocation = (htab->elf.splt->output_section->vma
9430 + htab->elf.splt->output_offset
9431 + ent->plt.offset);
9432 }
9433 /* Fall through. */
9434
9435 case R_PPC_RELAX:
9436 {
9437 const int *stub;
9438 size_t size;
9439 size_t insn_offset = rel->r_offset;
9440 unsigned int insn;
9441
9442 if (bfd_link_pic (info))
9443 {
9444 relocation -= (input_section->output_section->vma
9445 + input_section->output_offset
9446 + rel->r_offset - 4);
9447 stub = shared_stub_entry;
9448 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9449 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9450 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9451 stub += 3;
9452 size = ARRAY_SIZE (shared_stub_entry) - 3;
9453 }
9454 else
9455 {
9456 stub = stub_entry;
9457 size = ARRAY_SIZE (stub_entry);
9458 }
9459
9460 relocation += addend;
9461 if (bfd_link_relocatable (info))
9462 relocation = 0;
9463
9464 /* First insn is HA, second is LO. */
9465 insn = *stub++;
9466 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9467 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9468 insn_offset += 4;
9469
9470 insn = *stub++;
9471 insn |= relocation & 0xffff;
9472 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9473 insn_offset += 4;
9474 size -= 2;
9475
9476 while (size != 0)
9477 {
9478 insn = *stub++;
9479 --size;
9480 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9481 insn_offset += 4;
9482 }
9483
9484 /* Rewrite the reloc and convert one of the trailing nop
9485 relocs to describe this relocation. */
9486 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9487 /* The relocs are at the bottom 2 bytes */
9488 wrel->r_offset = rel->r_offset + d_offset;
9489 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9490 wrel->r_addend = rel->r_addend;
9491 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9492 wrel++, rel++;
9493 wrel->r_offset += 4;
9494 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9495 }
9496 continue;
9497
9498 /* Indirect .sdata relocation. */
9499 case R_PPC_EMB_SDAI16:
9500 BFD_ASSERT (htab->sdata[0].section != NULL);
9501 if (!is_static_defined (htab->sdata[0].sym))
9502 {
9503 unresolved_reloc = TRUE;
9504 break;
9505 }
9506 relocation
9507 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9508 h, relocation, rel);
9509 addend = 0;
9510 break;
9511
9512 /* Indirect .sdata2 relocation. */
9513 case R_PPC_EMB_SDA2I16:
9514 BFD_ASSERT (htab->sdata[1].section != NULL);
9515 if (!is_static_defined (htab->sdata[1].sym))
9516 {
9517 unresolved_reloc = TRUE;
9518 break;
9519 }
9520 relocation
9521 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9522 h, relocation, rel);
9523 addend = 0;
9524 break;
9525
9526 /* Handle the TOC16 reloc. We want to use the offset within the .got
9527 section, not the actual VMA. This is appropriate when generating
9528 an embedded ELF object, for which the .got section acts like the
9529 AIX .toc section. */
9530 case R_PPC_TOC16: /* phony GOT16 relocations */
9531 if (sec == NULL || sec->output_section == NULL)
9532 {
9533 unresolved_reloc = TRUE;
9534 break;
9535 }
9536 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9537 ".got") == 0
9538 || strcmp (bfd_get_section_name (sec->owner, sec),
9539 ".cgot") == 0);
9540
9541 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9542 break;
9543
9544 case R_PPC_PLTREL24:
9545 if (h != NULL && ifunc == NULL)
9546 {
9547 struct plt_entry *ent;
9548
9549 ent = find_plt_ent (&h->plt.plist, got2,
9550 bfd_link_pic (info) ? addend : 0);
9551 if (ent == NULL
9552 || htab->elf.splt == NULL)
9553 {
9554 /* We didn't make a PLT entry for this symbol. This
9555 happens when statically linking PIC code, or when
9556 using -Bsymbolic. */
9557 }
9558 else
9559 {
9560 /* Relocation is to the entry for this symbol in the
9561 procedure linkage table. */
9562 unresolved_reloc = FALSE;
9563 if (htab->plt_type == PLT_NEW)
9564 relocation = (htab->glink->output_section->vma
9565 + htab->glink->output_offset
9566 + ent->glink_offset);
9567 else
9568 relocation = (htab->elf.splt->output_section->vma
9569 + htab->elf.splt->output_offset
9570 + ent->plt.offset);
9571 }
9572 }
9573
9574 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9575 addend specifies the GOT pointer offset within .got2.
9576 Don't apply it to the relocation field. */
9577 addend = 0;
9578 break;
9579
9580 case R_PPC_PLTSEQ:
9581 case R_PPC_PLTCALL:
9582 case R_PPC_PLT16_LO:
9583 case R_PPC_PLT16_HI:
9584 case R_PPC_PLT16_HA:
9585 plt_list = NULL;
9586 if (h != NULL)
9587 plt_list = &h->plt.plist;
9588 else if (ifunc != NULL)
9589 plt_list = ifunc;
9590 else if (local_got_offsets != NULL)
9591 {
9592 struct plt_entry **local_plt;
9593 local_plt = (struct plt_entry **) (local_got_offsets
9594 + symtab_hdr->sh_info);
9595 plt_list = local_plt + r_symndx;
9596 }
9597 unresolved_reloc = TRUE;
9598 if (plt_list != NULL)
9599 {
9600 struct plt_entry *ent;
9601
9602 ent = find_plt_ent (plt_list, got2,
9603 bfd_link_pic (info) ? addend : 0);
9604 if (ent != NULL && ent->plt.offset != (bfd_vma) -1)
9605 {
9606 asection *plt;
9607
9608 unresolved_reloc = FALSE;
9609 plt = htab->elf.splt;
9610 if (!htab->elf.dynamic_sections_created
9611 || h == NULL
9612 || h->dynindx == -1)
9613 {
9614 if (ifunc != NULL)
9615 plt = htab->elf.iplt;
9616 else
9617 plt = htab->pltlocal;
9618 }
9619 relocation = (plt->output_section->vma
9620 + plt->output_offset
9621 + ent->plt.offset);
9622 if (bfd_link_pic (info))
9623 {
9624 bfd_vma got = 0;
9625
9626 if (ent->addend >= 32768)
9627 got = (ent->addend
9628 + ent->sec->output_section->vma
9629 + ent->sec->output_offset);
9630 else
9631 got = SYM_VAL (htab->elf.hgot);
9632 relocation -= got;
9633 }
9634 }
9635 }
9636 addend = 0;
9637 break;
9638
9639 /* Relocate against _SDA_BASE_. */
9640 case R_PPC_SDAREL16:
9641 {
9642 const char *name;
9643 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9644
9645 if (sec == NULL
9646 || sec->output_section == NULL
9647 || !is_static_defined (sda))
9648 {
9649 unresolved_reloc = TRUE;
9650 break;
9651 }
9652 addend -= SYM_VAL (sda);
9653
9654 name = bfd_get_section_name (output_bfd, sec->output_section);
9655 if (!(strcmp (name, ".sdata") == 0
9656 || strcmp (name, ".sbss") == 0))
9657 {
9658 _bfd_error_handler
9659 /* xgettext:c-format */
9660 (_("%pB: the target (%s) of a %s relocation is "
9661 "in the wrong output section (%s)"),
9662 input_bfd,
9663 sym_name,
9664 howto->name,
9665 name);
9666 }
9667 }
9668 break;
9669
9670 /* Relocate against _SDA2_BASE_. */
9671 case R_PPC_EMB_SDA2REL:
9672 {
9673 const char *name;
9674 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9675
9676 if (sec == NULL
9677 || sec->output_section == NULL
9678 || !is_static_defined (sda))
9679 {
9680 unresolved_reloc = TRUE;
9681 break;
9682 }
9683 addend -= SYM_VAL (sda);
9684
9685 name = bfd_get_section_name (output_bfd, sec->output_section);
9686 if (!(strcmp (name, ".sdata2") == 0
9687 || strcmp (name, ".sbss2") == 0))
9688 {
9689 _bfd_error_handler
9690 /* xgettext:c-format */
9691 (_("%pB: the target (%s) of a %s relocation is "
9692 "in the wrong output section (%s)"),
9693 input_bfd,
9694 sym_name,
9695 howto->name,
9696 name);
9697 }
9698 }
9699 break;
9700
9701 case R_PPC_VLE_LO16A:
9702 relocation = relocation + addend;
9703 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9704 contents + rel->r_offset, relocation,
9705 split16a_type, htab->params->vle_reloc_fixup);
9706 goto copy_reloc;
9707
9708 case R_PPC_VLE_LO16D:
9709 relocation = relocation + addend;
9710 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9711 contents + rel->r_offset, relocation,
9712 split16d_type, htab->params->vle_reloc_fixup);
9713 goto copy_reloc;
9714
9715 case R_PPC_VLE_HI16A:
9716 relocation = (relocation + addend) >> 16;
9717 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9718 contents + rel->r_offset, relocation,
9719 split16a_type, htab->params->vle_reloc_fixup);
9720 goto copy_reloc;
9721
9722 case R_PPC_VLE_HI16D:
9723 relocation = (relocation + addend) >> 16;
9724 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9725 contents + rel->r_offset, relocation,
9726 split16d_type, htab->params->vle_reloc_fixup);
9727 goto copy_reloc;
9728
9729 case R_PPC_VLE_HA16A:
9730 relocation = (relocation + addend + 0x8000) >> 16;
9731 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9732 contents + rel->r_offset, relocation,
9733 split16a_type, htab->params->vle_reloc_fixup);
9734 goto copy_reloc;
9735
9736 case R_PPC_VLE_HA16D:
9737 relocation = (relocation + addend + 0x8000) >> 16;
9738 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9739 contents + rel->r_offset, relocation,
9740 split16d_type, htab->params->vle_reloc_fixup);
9741 goto copy_reloc;
9742
9743 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9744 case R_PPC_EMB_SDA21:
9745 case R_PPC_VLE_SDA21:
9746 case R_PPC_EMB_RELSDA:
9747 case R_PPC_VLE_SDA21_LO:
9748 {
9749 const char *name;
9750 int reg;
9751 unsigned int insn;
9752 struct elf_link_hash_entry *sda = NULL;
9753
9754 if (sec == NULL || sec->output_section == NULL)
9755 {
9756 unresolved_reloc = TRUE;
9757 break;
9758 }
9759
9760 name = bfd_get_section_name (output_bfd, sec->output_section);
9761 if (strcmp (name, ".sdata") == 0
9762 || strcmp (name, ".sbss") == 0)
9763 {
9764 reg = 13;
9765 sda = htab->sdata[0].sym;
9766 }
9767 else if (strcmp (name, ".sdata2") == 0
9768 || strcmp (name, ".sbss2") == 0)
9769 {
9770 reg = 2;
9771 sda = htab->sdata[1].sym;
9772 }
9773 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9774 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9775 {
9776 reg = 0;
9777 }
9778 else
9779 {
9780 _bfd_error_handler
9781 /* xgettext:c-format */
9782 (_("%pB: the target (%s) of a %s relocation is "
9783 "in the wrong output section (%s)"),
9784 input_bfd,
9785 sym_name,
9786 howto->name,
9787 name);
9788
9789 bfd_set_error (bfd_error_bad_value);
9790 ret = FALSE;
9791 goto copy_reloc;
9792 }
9793
9794 if (sda != NULL)
9795 {
9796 if (!is_static_defined (sda))
9797 {
9798 unresolved_reloc = TRUE;
9799 break;
9800 }
9801 addend -= SYM_VAL (sda);
9802 }
9803
9804 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9805 if (reg == 0
9806 && (r_type == R_PPC_VLE_SDA21
9807 || r_type == R_PPC_VLE_SDA21_LO))
9808 {
9809 relocation = relocation + addend;
9810 addend = 0;
9811
9812 /* Force e_li insn, keeping RT from original insn. */
9813 insn &= 0x1f << 21;
9814 insn |= 28u << 26;
9815
9816 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9817 /* Top 4 bits of value to 17..20. */
9818 insn |= (relocation & 0xf0000) >> 5;
9819 /* Next 5 bits of the value to 11..15. */
9820 insn |= (relocation & 0xf800) << 5;
9821 /* And the final 11 bits of the value to bits 21 to 31. */
9822 insn |= relocation & 0x7ff;
9823
9824 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9825
9826 if (r_type == R_PPC_VLE_SDA21
9827 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9828 goto overflow;
9829 goto copy_reloc;
9830 }
9831 else if (r_type == R_PPC_EMB_SDA21
9832 || r_type == R_PPC_VLE_SDA21
9833 || r_type == R_PPC_VLE_SDA21_LO)
9834 {
9835 /* Fill in register field. */
9836 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9837 }
9838 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9839 }
9840 break;
9841
9842 case R_PPC_VLE_SDAREL_LO16A:
9843 case R_PPC_VLE_SDAREL_LO16D:
9844 case R_PPC_VLE_SDAREL_HI16A:
9845 case R_PPC_VLE_SDAREL_HI16D:
9846 case R_PPC_VLE_SDAREL_HA16A:
9847 case R_PPC_VLE_SDAREL_HA16D:
9848 {
9849 bfd_vma value;
9850 const char *name;
9851 struct elf_link_hash_entry *sda = NULL;
9852
9853 if (sec == NULL || sec->output_section == NULL)
9854 {
9855 unresolved_reloc = TRUE;
9856 break;
9857 }
9858
9859 name = bfd_get_section_name (output_bfd, sec->output_section);
9860 if (strcmp (name, ".sdata") == 0
9861 || strcmp (name, ".sbss") == 0)
9862 sda = htab->sdata[0].sym;
9863 else if (strcmp (name, ".sdata2") == 0
9864 || strcmp (name, ".sbss2") == 0)
9865 sda = htab->sdata[1].sym;
9866 else
9867 {
9868 _bfd_error_handler
9869 /* xgettext:c-format */
9870 (_("%pB: the target (%s) of a %s relocation is "
9871 "in the wrong output section (%s)"),
9872 input_bfd,
9873 sym_name,
9874 howto->name,
9875 name);
9876
9877 bfd_set_error (bfd_error_bad_value);
9878 ret = FALSE;
9879 goto copy_reloc;
9880 }
9881
9882 if (sda == NULL || !is_static_defined (sda))
9883 {
9884 unresolved_reloc = TRUE;
9885 break;
9886 }
9887 value = relocation + addend - SYM_VAL (sda);
9888
9889 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9890 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9891 contents + rel->r_offset, value,
9892 split16a_type,
9893 htab->params->vle_reloc_fixup);
9894 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9895 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9896 contents + rel->r_offset, value,
9897 split16d_type,
9898 htab->params->vle_reloc_fixup);
9899 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9900 {
9901 value = value >> 16;
9902 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9903 contents + rel->r_offset, value,
9904 split16a_type,
9905 htab->params->vle_reloc_fixup);
9906 }
9907 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9908 {
9909 value = value >> 16;
9910 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9911 contents + rel->r_offset, value,
9912 split16d_type,
9913 htab->params->vle_reloc_fixup);
9914 }
9915 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9916 {
9917 value = (value + 0x8000) >> 16;
9918 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9919 contents + rel->r_offset, value,
9920 split16a_type,
9921 htab->params->vle_reloc_fixup);
9922 }
9923 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9924 {
9925 value = (value + 0x8000) >> 16;
9926 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9927 contents + rel->r_offset, value,
9928 split16d_type,
9929 htab->params->vle_reloc_fixup);
9930 }
9931 }
9932 goto copy_reloc;
9933
9934 case R_PPC_VLE_ADDR20:
9935 ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, relocation);
9936 continue;
9937
9938 /* Relocate against the beginning of the section. */
9939 case R_PPC_SECTOFF:
9940 case R_PPC_SECTOFF_LO:
9941 case R_PPC_SECTOFF_HI:
9942 case R_PPC_SECTOFF_HA:
9943 if (sec == NULL || sec->output_section == NULL)
9944 {
9945 unresolved_reloc = TRUE;
9946 break;
9947 }
9948 addend -= sec->output_section->vma;
9949 break;
9950
9951 /* Negative relocations. */
9952 case R_PPC_EMB_NADDR32:
9953 case R_PPC_EMB_NADDR16:
9954 case R_PPC_EMB_NADDR16_LO:
9955 case R_PPC_EMB_NADDR16_HI:
9956 case R_PPC_EMB_NADDR16_HA:
9957 addend -= 2 * relocation;
9958 break;
9959
9960 case R_PPC_COPY:
9961 case R_PPC_GLOB_DAT:
9962 case R_PPC_JMP_SLOT:
9963 case R_PPC_RELATIVE:
9964 case R_PPC_IRELATIVE:
9965 case R_PPC_PLT32:
9966 case R_PPC_PLTREL32:
9967 case R_PPC_ADDR30:
9968 case R_PPC_EMB_RELSEC16:
9969 case R_PPC_EMB_RELST_LO:
9970 case R_PPC_EMB_RELST_HI:
9971 case R_PPC_EMB_RELST_HA:
9972 case R_PPC_EMB_BIT_FLD:
9973 /* xgettext:c-format */
9974 _bfd_error_handler (_("%pB: %s unsupported"),
9975 input_bfd, howto->name);
9976
9977 bfd_set_error (bfd_error_invalid_operation);
9978 ret = FALSE;
9979 goto copy_reloc;
9980 }
9981
9982 switch (r_type)
9983 {
9984 default:
9985 break;
9986
9987 case R_PPC_PLTCALL:
9988 if (unresolved_reloc)
9989 {
9990 bfd_byte *p = contents + rel->r_offset;
9991 unsigned int insn = bfd_get_32 (input_bfd, p);
9992 insn &= 1;
9993 bfd_put_32 (input_bfd, B | insn, p);
9994 unresolved_reloc = save_unresolved_reloc;
9995 r_type = R_PPC_REL24;
9996 howto = ppc_elf_howto_table[r_type];
9997 }
9998 else if (htab->plt_type != PLT_NEW)
9999 info->callbacks->einfo
10000 (_("%P: %H: %s relocation unsupported for bss-plt\n"),
10001 input_bfd, input_section, rel->r_offset,
10002 howto->name);
10003 break;
10004
10005 case R_PPC_PLTSEQ:
10006 case R_PPC_PLT16_HA:
10007 case R_PPC_PLT16_LO:
10008 if (unresolved_reloc)
10009 {
10010 bfd_byte *p = contents + (rel->r_offset & ~3);
10011 bfd_put_32 (input_bfd, NOP, p);
10012 unresolved_reloc = FALSE;
10013 r_type = R_PPC_NONE;
10014 howto = ppc_elf_howto_table[r_type];
10015 }
10016 else if (htab->plt_type != PLT_NEW)
10017 info->callbacks->einfo
10018 (_("%P: %H: %s relocation unsupported for bss-plt\n"),
10019 input_bfd, input_section, rel->r_offset,
10020 howto->name);
10021 break;
10022 }
10023
10024 /* Do any further special processing. */
10025 switch (r_type)
10026 {
10027 default:
10028 break;
10029
10030 case R_PPC_ADDR16_HA:
10031 case R_PPC_REL16_HA:
10032 case R_PPC_REL16DX_HA:
10033 case R_PPC_SECTOFF_HA:
10034 case R_PPC_TPREL16_HA:
10035 case R_PPC_DTPREL16_HA:
10036 case R_PPC_EMB_NADDR16_HA:
10037 case R_PPC_EMB_RELST_HA:
10038 /* It's just possible that this symbol is a weak symbol
10039 that's not actually defined anywhere. In that case,
10040 'sec' would be NULL, and we should leave the symbol
10041 alone (it will be set to zero elsewhere in the link). */
10042 if (sec == NULL)
10043 break;
10044 /* Fall through. */
10045
10046 case R_PPC_PLT16_HA:
10047 case R_PPC_GOT16_HA:
10048 case R_PPC_GOT_TLSGD16_HA:
10049 case R_PPC_GOT_TLSLD16_HA:
10050 case R_PPC_GOT_TPREL16_HA:
10051 case R_PPC_GOT_DTPREL16_HA:
10052 /* Add 0x10000 if sign bit in 0:15 is set.
10053 Bits 0:15 are not used. */
10054 addend += 0x8000;
10055 break;
10056
10057 case R_PPC_ADDR16:
10058 case R_PPC_ADDR16_LO:
10059 case R_PPC_GOT16:
10060 case R_PPC_GOT16_LO:
10061 case R_PPC_SDAREL16:
10062 case R_PPC_SECTOFF:
10063 case R_PPC_SECTOFF_LO:
10064 case R_PPC_DTPREL16:
10065 case R_PPC_DTPREL16_LO:
10066 case R_PPC_TPREL16:
10067 case R_PPC_TPREL16_LO:
10068 case R_PPC_GOT_TLSGD16:
10069 case R_PPC_GOT_TLSGD16_LO:
10070 case R_PPC_GOT_TLSLD16:
10071 case R_PPC_GOT_TLSLD16_LO:
10072 case R_PPC_GOT_DTPREL16:
10073 case R_PPC_GOT_DTPREL16_LO:
10074 case R_PPC_GOT_TPREL16:
10075 case R_PPC_GOT_TPREL16_LO:
10076 {
10077 /* The 32-bit ABI lacks proper relocations to deal with
10078 certain 64-bit instructions. Prevent damage to bits
10079 that make up part of the insn opcode. */
10080 unsigned int insn, mask, lobit;
10081
10082 insn = bfd_get_32 (input_bfd,
10083 contents + rel->r_offset - d_offset);
10084 mask = 0;
10085 if (is_insn_ds_form (insn))
10086 mask = 3;
10087 else if (is_insn_dq_form (insn))
10088 mask = 15;
10089 else
10090 break;
10091 relocation += addend;
10092 addend = insn & mask;
10093 lobit = mask & relocation;
10094 if (lobit != 0)
10095 {
10096 relocation ^= lobit;
10097 info->callbacks->einfo
10098 /* xgettext:c-format */
10099 (_("%H: error: %s against `%s' not a multiple of %u\n"),
10100 input_bfd, input_section, rel->r_offset,
10101 howto->name, sym_name, mask + 1);
10102 bfd_set_error (bfd_error_bad_value);
10103 ret = FALSE;
10104 }
10105 }
10106 break;
10107 }
10108
10109 #ifdef DEBUG
10110 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
10111 "offset = %ld, addend = %ld\n",
10112 howto->name,
10113 (int) r_type,
10114 sym_name,
10115 r_symndx,
10116 (long) rel->r_offset,
10117 (long) addend);
10118 #endif
10119
10120 if (unresolved_reloc
10121 && !((input_section->flags & SEC_DEBUGGING) != 0
10122 && h->def_dynamic)
10123 && _bfd_elf_section_offset (output_bfd, info, input_section,
10124 rel->r_offset) != (bfd_vma) -1)
10125 {
10126 info->callbacks->einfo
10127 /* xgettext:c-format */
10128 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
10129 input_bfd, input_section, rel->r_offset,
10130 howto->name,
10131 sym_name);
10132 ret = FALSE;
10133 }
10134
10135 /* 16-bit fields in insns mostly have signed values, but a
10136 few insns have 16-bit unsigned values. Really, we should
10137 have different reloc types. */
10138 if (howto->complain_on_overflow != complain_overflow_dont
10139 && howto->dst_mask == 0xffff
10140 && (input_section->flags & SEC_CODE) != 0)
10141 {
10142 enum complain_overflow complain = complain_overflow_signed;
10143
10144 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
10145 {
10146 unsigned int insn;
10147
10148 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
10149 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
10150 complain = complain_overflow_bitfield;
10151 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
10152 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
10153 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
10154 complain = complain_overflow_unsigned;
10155 }
10156 if (howto->complain_on_overflow != complain)
10157 {
10158 alt_howto = *howto;
10159 alt_howto.complain_on_overflow = complain;
10160 howto = &alt_howto;
10161 }
10162 }
10163
10164 if (r_type == R_PPC_REL16DX_HA)
10165 {
10166 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
10167 if (rel->r_offset + 4 > input_section->size)
10168 r = bfd_reloc_outofrange;
10169 else
10170 {
10171 unsigned int insn;
10172
10173 relocation += addend;
10174 relocation -= (rel->r_offset
10175 + input_section->output_offset
10176 + input_section->output_section->vma);
10177 relocation >>= 16;
10178 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
10179 insn &= ~0x1fffc1;
10180 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
10181 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
10182 r = bfd_reloc_ok;
10183 }
10184 }
10185 else
10186 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
10187 rel->r_offset, relocation, addend);
10188
10189 if (r != bfd_reloc_ok)
10190 {
10191 if (r == bfd_reloc_overflow)
10192 {
10193 overflow:
10194 /* On code like "if (foo) foo();" don't report overflow
10195 on a branch to zero when foo is undefined. */
10196 if (!warned
10197 && !(h != NULL
10198 && (h->root.type == bfd_link_hash_undefweak
10199 || h->root.type == bfd_link_hash_undefined)
10200 && is_branch_reloc (r_type)))
10201 info->callbacks->reloc_overflow
10202 (info, (h ? &h->root : NULL), sym_name, howto->name,
10203 rel->r_addend, input_bfd, input_section, rel->r_offset);
10204 }
10205 else
10206 {
10207 info->callbacks->einfo
10208 /* xgettext:c-format */
10209 (_("%H: %s reloc against `%s': error %d\n"),
10210 input_bfd, input_section, rel->r_offset,
10211 howto->name, sym_name, (int) r);
10212 ret = FALSE;
10213 }
10214 }
10215 copy_reloc:
10216 if (wrel != rel)
10217 *wrel = *rel;
10218 }
10219
10220 if (wrel != rel)
10221 {
10222 Elf_Internal_Shdr *rel_hdr;
10223 size_t deleted = rel - wrel;
10224
10225 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
10226 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
10227 if (rel_hdr->sh_size == 0)
10228 {
10229 /* It is too late to remove an empty reloc section. Leave
10230 one NONE reloc.
10231 ??? What is wrong with an empty section??? */
10232 rel_hdr->sh_size = rel_hdr->sh_entsize;
10233 deleted -= 1;
10234 wrel++;
10235 }
10236 relend = wrel;
10237 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
10238 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
10239 input_section->reloc_count -= deleted;
10240 }
10241
10242 #ifdef DEBUG
10243 fprintf (stderr, "\n");
10244 #endif
10245
10246 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
10247 && input_section->size != input_section->rawsize
10248 && (strcmp (input_section->output_section->name, ".init") == 0
10249 || strcmp (input_section->output_section->name, ".fini") == 0))
10250 {
10251 /* Branch around the trampolines. */
10252 unsigned int insn = B + input_section->size - input_section->rawsize;
10253 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
10254 }
10255
10256 if (htab->params->ppc476_workaround
10257 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
10258 && (!bfd_link_relocatable (info)
10259 || (input_section->output_section->alignment_power
10260 >= htab->params->pagesize_p2)))
10261 {
10262 bfd_vma start_addr, end_addr, addr;
10263 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10264
10265 if (relax_info->workaround_size != 0)
10266 {
10267 bfd_byte *p;
10268 unsigned int n;
10269 bfd_byte fill[4];
10270
10271 bfd_put_32 (input_bfd, BA, fill);
10272 p = contents + input_section->size - relax_info->workaround_size;
10273 n = relax_info->workaround_size >> 2;
10274 while (n--)
10275 {
10276 memcpy (p, fill, 4);
10277 p += 4;
10278 }
10279 }
10280
10281 /* The idea is: Replace the last instruction on a page with a
10282 branch to a patch area. Put the insn there followed by a
10283 branch back to the next page. Complicated a little by
10284 needing to handle moved conditional branches, and by not
10285 wanting to touch data-in-text. */
10286
10287 start_addr = (input_section->output_section->vma
10288 + input_section->output_offset);
10289 end_addr = (start_addr + input_section->size
10290 - relax_info->workaround_size);
10291 for (addr = ((start_addr & -pagesize) + pagesize - 4);
10292 addr < end_addr;
10293 addr += pagesize)
10294 {
10295 bfd_vma offset = addr - start_addr;
10296 Elf_Internal_Rela *lo, *hi;
10297 bfd_boolean is_data;
10298 bfd_vma patch_off, patch_addr;
10299 unsigned int insn;
10300
10301 /* Do we have a data reloc at this offset? If so, leave
10302 the word alone. */
10303 is_data = FALSE;
10304 lo = relocs;
10305 hi = relend;
10306 rel = NULL;
10307 while (lo < hi)
10308 {
10309 rel = lo + (hi - lo) / 2;
10310 if (rel->r_offset < offset)
10311 lo = rel + 1;
10312 else if (rel->r_offset > offset + 3)
10313 hi = rel;
10314 else
10315 {
10316 switch (ELF32_R_TYPE (rel->r_info))
10317 {
10318 case R_PPC_ADDR32:
10319 case R_PPC_UADDR32:
10320 case R_PPC_REL32:
10321 case R_PPC_ADDR30:
10322 is_data = TRUE;
10323 break;
10324 default:
10325 break;
10326 }
10327 break;
10328 }
10329 }
10330 if (is_data)
10331 continue;
10332
10333 /* Some instructions can be left alone too. Unconditional
10334 branches, except for bcctr with BO=0x14 (bctr, bctrl),
10335 avoid the icache failure.
10336
10337 The problem occurs due to prefetch across a page boundary
10338 where stale instructions can be fetched from the next
10339 page, and the mechanism for flushing these bad
10340 instructions fails under certain circumstances. The
10341 unconditional branches:
10342 1) Branch: b, bl, ba, bla,
10343 2) Branch Conditional: bc, bca, bcl, bcla,
10344 3) Branch Conditional to Link Register: bclr, bclrl,
10345 where (2) and (3) have BO=0x14 making them unconditional,
10346 prevent the bad prefetch because the prefetch itself is
10347 affected by these instructions. This happens even if the
10348 instruction is not executed.
10349
10350 A bctr example:
10351 .
10352 . lis 9,new_page@ha
10353 . addi 9,9,new_page@l
10354 . mtctr 9
10355 . bctr
10356 . nop
10357 . nop
10358 . new_page:
10359 .
10360 The bctr is not predicted taken due to ctr not being
10361 ready, so prefetch continues on past the bctr into the
10362 new page which might have stale instructions. If they
10363 fail to be flushed, then they will be executed after the
10364 bctr executes. Either of the following modifications
10365 prevent the bad prefetch from happening in the first
10366 place:
10367 .
10368 . lis 9,new_page@ha lis 9,new_page@ha
10369 . addi 9,9,new_page@l addi 9,9,new_page@l
10370 . mtctr 9 mtctr 9
10371 . bctr bctr
10372 . nop b somewhere_else
10373 . b somewhere_else nop
10374 . new_page: new_page:
10375 . */
10376 insn = bfd_get_32 (input_bfd, contents + offset);
10377 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
10378 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
10379 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
10380 || ((insn & (0x3f << 26)) == (19u << 26)
10381 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
10382 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
10383 continue;
10384
10385 patch_addr = (start_addr + input_section->size
10386 - relax_info->workaround_size);
10387 patch_addr = (patch_addr + 15) & -16;
10388 patch_off = patch_addr - start_addr;
10389 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
10390
10391 if (rel != NULL
10392 && rel->r_offset >= offset
10393 && rel->r_offset < offset + 4)
10394 {
10395 asection *sreloc;
10396
10397 /* If the insn we are patching had a reloc, adjust the
10398 reloc r_offset so that the reloc applies to the moved
10399 location. This matters for -r and --emit-relocs. */
10400 if (rel + 1 != relend)
10401 {
10402 Elf_Internal_Rela tmp = *rel;
10403
10404 /* Keep the relocs sorted by r_offset. */
10405 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
10406 relend[-1] = tmp;
10407 }
10408 relend[-1].r_offset += patch_off - offset;
10409
10410 /* Adjust REL16 addends too. */
10411 switch (ELF32_R_TYPE (relend[-1].r_info))
10412 {
10413 case R_PPC_REL16:
10414 case R_PPC_REL16_LO:
10415 case R_PPC_REL16_HI:
10416 case R_PPC_REL16_HA:
10417 relend[-1].r_addend += patch_off - offset;
10418 break;
10419 default:
10420 break;
10421 }
10422
10423 /* If we are building a PIE or shared library with
10424 non-PIC objects, perhaps we had a dynamic reloc too?
10425 If so, the dynamic reloc must move with the insn. */
10426 sreloc = elf_section_data (input_section)->sreloc;
10427 if (sreloc != NULL)
10428 {
10429 Elf32_External_Rela *slo, *shi, *srelend;
10430 bfd_vma soffset;
10431
10432 slo = (Elf32_External_Rela *) sreloc->contents;
10433 shi = srelend = slo + sreloc->reloc_count;
10434 soffset = (offset + input_section->output_section->vma
10435 + input_section->output_offset);
10436 while (slo < shi)
10437 {
10438 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
10439 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
10440 &outrel);
10441 if (outrel.r_offset < soffset)
10442 slo = srel + 1;
10443 else if (outrel.r_offset > soffset + 3)
10444 shi = srel;
10445 else
10446 {
10447 if (srel + 1 != srelend)
10448 {
10449 memmove (srel, srel + 1,
10450 (srelend - (srel + 1)) * sizeof (*srel));
10451 srel = srelend - 1;
10452 }
10453 outrel.r_offset += patch_off - offset;
10454 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
10455 (bfd_byte *) srel);
10456 break;
10457 }
10458 }
10459 }
10460 }
10461 else
10462 rel = NULL;
10463
10464 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
10465 && (insn & 2) == 0 /* relative */)
10466 {
10467 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
10468
10469 delta += offset - patch_off;
10470 if (bfd_link_relocatable (info) && rel != NULL)
10471 delta = 0;
10472 if (!bfd_link_relocatable (info) && rel != NULL)
10473 {
10474 enum elf_ppc_reloc_type r_type;
10475
10476 r_type = ELF32_R_TYPE (relend[-1].r_info);
10477 if (r_type == R_PPC_REL14_BRTAKEN)
10478 insn |= BRANCH_PREDICT_BIT;
10479 else if (r_type == R_PPC_REL14_BRNTAKEN)
10480 insn &= ~BRANCH_PREDICT_BIT;
10481 else
10482 BFD_ASSERT (r_type == R_PPC_REL14);
10483
10484 if ((r_type == R_PPC_REL14_BRTAKEN
10485 || r_type == R_PPC_REL14_BRNTAKEN)
10486 && delta + 0x8000 < 0x10000
10487 && (bfd_signed_vma) delta < 0)
10488 insn ^= BRANCH_PREDICT_BIT;
10489 }
10490 if (delta + 0x8000 < 0x10000)
10491 {
10492 bfd_put_32 (input_bfd,
10493 (insn & ~0xfffc) | (delta & 0xfffc),
10494 contents + patch_off);
10495 patch_off += 4;
10496 bfd_put_32 (input_bfd,
10497 B | ((offset + 4 - patch_off) & 0x3fffffc),
10498 contents + patch_off);
10499 patch_off += 4;
10500 }
10501 else
10502 {
10503 if (rel != NULL)
10504 {
10505 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10506
10507 relend[-1].r_offset += 8;
10508 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10509 }
10510 bfd_put_32 (input_bfd,
10511 (insn & ~0xfffc) | 8,
10512 contents + patch_off);
10513 patch_off += 4;
10514 bfd_put_32 (input_bfd,
10515 B | ((offset + 4 - patch_off) & 0x3fffffc),
10516 contents + patch_off);
10517 patch_off += 4;
10518 bfd_put_32 (input_bfd,
10519 B | ((delta - 8) & 0x3fffffc),
10520 contents + patch_off);
10521 patch_off += 4;
10522 }
10523 }
10524 else
10525 {
10526 bfd_put_32 (input_bfd, insn, contents + patch_off);
10527 patch_off += 4;
10528 bfd_put_32 (input_bfd,
10529 B | ((offset + 4 - patch_off) & 0x3fffffc),
10530 contents + patch_off);
10531 patch_off += 4;
10532 }
10533 BFD_ASSERT (patch_off <= input_section->size);
10534 relax_info->workaround_size = input_section->size - patch_off;
10535 }
10536 }
10537
10538 return ret;
10539 }
10540 \f
10541 /* Write out the PLT relocs and entries for H. */
10542
10543 static bfd_boolean
10544 write_global_sym_plt (struct elf_link_hash_entry *h, void *inf)
10545 {
10546 struct bfd_link_info *info = (struct bfd_link_info *) inf;
10547 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10548 struct plt_entry *ent;
10549 bfd_boolean doneone;
10550
10551 doneone = FALSE;
10552 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10553 if (ent->plt.offset != (bfd_vma) -1)
10554 {
10555 if (!doneone)
10556 {
10557 Elf_Internal_Rela rela;
10558 bfd_byte *loc;
10559 bfd_vma reloc_index;
10560 asection *plt = htab->elf.splt;
10561 asection *relplt = htab->elf.srelplt;
10562
10563 if (htab->plt_type == PLT_NEW
10564 || !htab->elf.dynamic_sections_created
10565 || h->dynindx == -1)
10566 reloc_index = ent->plt.offset / 4;
10567 else
10568 {
10569 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10570 / htab->plt_slot_size);
10571 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10572 && htab->plt_type == PLT_OLD)
10573 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10574 }
10575
10576 /* This symbol has an entry in the procedure linkage table.
10577 Set it up. */
10578 if (htab->plt_type == PLT_VXWORKS
10579 && htab->elf.dynamic_sections_created
10580 && h->dynindx != -1)
10581 {
10582 bfd_vma got_offset;
10583 const bfd_vma *plt_entry;
10584
10585 /* The first three entries in .got.plt are reserved. */
10586 got_offset = (reloc_index + 3) * 4;
10587
10588 /* Use the right PLT. */
10589 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10590 : ppc_elf_vxworks_plt_entry;
10591
10592 /* Fill in the .plt on VxWorks. */
10593 if (bfd_link_pic (info))
10594 {
10595 bfd_put_32 (info->output_bfd,
10596 plt_entry[0] | PPC_HA (got_offset),
10597 plt->contents + ent->plt.offset + 0);
10598 bfd_put_32 (info->output_bfd,
10599 plt_entry[1] | PPC_LO (got_offset),
10600 plt->contents + ent->plt.offset + 4);
10601 }
10602 else
10603 {
10604 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10605
10606 bfd_put_32 (info->output_bfd,
10607 plt_entry[0] | PPC_HA (got_loc),
10608 plt->contents + ent->plt.offset + 0);
10609 bfd_put_32 (info->output_bfd,
10610 plt_entry[1] | PPC_LO (got_loc),
10611 plt->contents + ent->plt.offset + 4);
10612 }
10613
10614 bfd_put_32 (info->output_bfd, plt_entry[2],
10615 plt->contents + ent->plt.offset + 8);
10616 bfd_put_32 (info->output_bfd, plt_entry[3],
10617 plt->contents + ent->plt.offset + 12);
10618
10619 /* This instruction is an immediate load. The value loaded is
10620 the byte offset of the R_PPC_JMP_SLOT relocation from the
10621 start of the .rela.plt section. The value is stored in the
10622 low-order 16 bits of the load instruction. */
10623 /* NOTE: It appears that this is now an index rather than a
10624 prescaled offset. */
10625 bfd_put_32 (info->output_bfd,
10626 plt_entry[4] | reloc_index,
10627 plt->contents + ent->plt.offset + 16);
10628 /* This instruction is a PC-relative branch whose target is
10629 the start of the PLT section. The address of this branch
10630 instruction is 20 bytes beyond the start of this PLT entry.
10631 The address is encoded in bits 6-29, inclusive. The value
10632 stored is right-shifted by two bits, permitting a 26-bit
10633 offset. */
10634 bfd_put_32 (info->output_bfd,
10635 (plt_entry[5]
10636 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10637 plt->contents + ent->plt.offset + 20);
10638 bfd_put_32 (info->output_bfd, plt_entry[6],
10639 plt->contents + ent->plt.offset + 24);
10640 bfd_put_32 (info->output_bfd, plt_entry[7],
10641 plt->contents + ent->plt.offset + 28);
10642
10643 /* Fill in the GOT entry corresponding to this PLT slot with
10644 the address immediately after the "bctr" instruction
10645 in this PLT entry. */
10646 bfd_put_32 (info->output_bfd, (plt->output_section->vma
10647 + plt->output_offset
10648 + ent->plt.offset + 16),
10649 htab->elf.sgotplt->contents + got_offset);
10650
10651 if (!bfd_link_pic (info))
10652 {
10653 /* Fill in a couple of entries in .rela.plt.unloaded. */
10654 loc = htab->srelplt2->contents
10655 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10656 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10657 * sizeof (Elf32_External_Rela));
10658
10659 /* Provide the @ha relocation for the first instruction. */
10660 rela.r_offset = (plt->output_section->vma
10661 + plt->output_offset
10662 + ent->plt.offset + 2);
10663 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10664 R_PPC_ADDR16_HA);
10665 rela.r_addend = got_offset;
10666 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10667 loc += sizeof (Elf32_External_Rela);
10668
10669 /* Provide the @l relocation for the second instruction. */
10670 rela.r_offset = (plt->output_section->vma
10671 + plt->output_offset
10672 + ent->plt.offset + 6);
10673 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10674 R_PPC_ADDR16_LO);
10675 rela.r_addend = got_offset;
10676 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10677 loc += sizeof (Elf32_External_Rela);
10678
10679 /* Provide a relocation for the GOT entry corresponding to this
10680 PLT slot. Point it at the middle of the .plt entry. */
10681 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10682 + htab->elf.sgotplt->output_offset
10683 + got_offset);
10684 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10685 R_PPC_ADDR32);
10686 rela.r_addend = ent->plt.offset + 16;
10687 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10688 }
10689
10690 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10691 In particular, the offset for the relocation is not the
10692 address of the PLT entry for this function, as specified
10693 by the ABI. Instead, the offset is set to the address of
10694 the GOT slot for this function. See EABI 4.4.4.1. */
10695 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10696 + htab->elf.sgotplt->output_offset
10697 + got_offset);
10698 rela.r_addend = 0;
10699 }
10700 else
10701 {
10702 rela.r_addend = 0;
10703 if (!htab->elf.dynamic_sections_created
10704 || h->dynindx == -1)
10705 {
10706 if (h->type == STT_GNU_IFUNC)
10707 {
10708 plt = htab->elf.iplt;
10709 relplt = htab->elf.irelplt;
10710 }
10711 else
10712 {
10713 plt = htab->pltlocal;
10714 relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL;
10715 }
10716 if (h->def_regular
10717 && (h->root.type == bfd_link_hash_defined
10718 || h->root.type == bfd_link_hash_defweak))
10719 rela.r_addend = SYM_VAL (h);
10720 }
10721
10722 if (relplt == NULL)
10723 {
10724 loc = plt->contents + ent->plt.offset;
10725 bfd_put_32 (info->output_bfd, rela.r_addend, loc);
10726 }
10727 else
10728 {
10729 rela.r_offset = (plt->output_section->vma
10730 + plt->output_offset
10731 + ent->plt.offset);
10732
10733 if (htab->plt_type == PLT_OLD
10734 || !htab->elf.dynamic_sections_created
10735 || h->dynindx == -1)
10736 {
10737 /* We don't need to fill in the .plt. The ppc dynamic
10738 linker will fill it in. */
10739 }
10740 else
10741 {
10742 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10743 + htab->glink->output_section->vma
10744 + htab->glink->output_offset);
10745 bfd_put_32 (info->output_bfd, val,
10746 plt->contents + ent->plt.offset);
10747 }
10748 }
10749 }
10750
10751 if (relplt != NULL)
10752 {
10753 /* Fill in the entry in the .rela.plt section. */
10754 if (!htab->elf.dynamic_sections_created
10755 || h->dynindx == -1)
10756 {
10757 if (h->type == STT_GNU_IFUNC)
10758 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10759 else
10760 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
10761 loc = relplt->contents + (relplt->reloc_count++
10762 * sizeof (Elf32_External_Rela));
10763 htab->local_ifunc_resolver = 1;
10764 }
10765 else
10766 {
10767 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10768 loc = relplt->contents + (reloc_index
10769 * sizeof (Elf32_External_Rela));
10770 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10771 htab->maybe_local_ifunc_resolver = 1;
10772 }
10773 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10774 }
10775 doneone = TRUE;
10776 }
10777
10778 if (htab->plt_type == PLT_NEW
10779 || !htab->elf.dynamic_sections_created
10780 || h->dynindx == -1)
10781 {
10782 unsigned char *p;
10783 asection *plt = htab->elf.splt;
10784
10785 if (!htab->elf.dynamic_sections_created
10786 || h->dynindx == -1)
10787 {
10788 if (h->type == STT_GNU_IFUNC)
10789 plt = htab->elf.iplt;
10790 else
10791 break;
10792 }
10793
10794 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10795 write_glink_stub (h, ent, plt, p, info);
10796
10797 if (!bfd_link_pic (info))
10798 /* We only need one non-PIC glink stub. */
10799 break;
10800 }
10801 else
10802 break;
10803 }
10804 return TRUE;
10805 }
10806
10807 /* Finish up PLT handling. */
10808
10809 bfd_boolean
10810 ppc_finish_symbols (struct bfd_link_info *info)
10811 {
10812 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10813 bfd *ibfd;
10814
10815 if (!htab)
10816 return TRUE;
10817
10818 elf_link_hash_traverse (&htab->elf, write_global_sym_plt, info);
10819
10820 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
10821 {
10822 bfd_vma *local_got, *end_local_got;
10823 struct plt_entry **local_plt, **lplt, **end_local_plt;
10824 Elf_Internal_Shdr *symtab_hdr;
10825 bfd_size_type locsymcount;
10826 Elf_Internal_Sym *local_syms = NULL;
10827 struct plt_entry *ent;
10828
10829 if (!is_ppc_elf (ibfd))
10830 continue;
10831
10832 local_got = elf_local_got_offsets (ibfd);
10833 if (!local_got)
10834 continue;
10835
10836 symtab_hdr = &elf_symtab_hdr (ibfd);
10837 locsymcount = symtab_hdr->sh_info;
10838 end_local_got = local_got + locsymcount;
10839 local_plt = (struct plt_entry **) end_local_got;
10840 end_local_plt = local_plt + locsymcount;
10841 for (lplt = local_plt; lplt < end_local_plt; ++lplt)
10842 for (ent = *lplt; ent != NULL; ent = ent->next)
10843 {
10844 if (ent->plt.offset != (bfd_vma) -1)
10845 {
10846 Elf_Internal_Sym *sym;
10847 asection *sym_sec;
10848 asection *plt, *relplt;
10849 bfd_byte *loc;
10850 bfd_vma val;
10851 Elf_Internal_Rela rela;
10852
10853 if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms,
10854 lplt - local_plt, ibfd))
10855 {
10856 if (local_syms != NULL
10857 && symtab_hdr->contents != (unsigned char *) local_syms)
10858 free (local_syms);
10859 return FALSE;
10860 }
10861
10862 val = sym->st_value;
10863 if (sym_sec != NULL && sym_sec->output_section != NULL)
10864 val += sym_sec->output_offset + sym_sec->output_section->vma;
10865
10866 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
10867 {
10868 htab->local_ifunc_resolver = 1;
10869 plt = htab->elf.iplt;
10870 relplt = htab->elf.irelplt;
10871 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10872 }
10873 else
10874 {
10875 plt = htab->pltlocal;
10876 if (bfd_link_pic (info))
10877 {
10878 relplt = htab->relpltlocal;
10879 rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
10880 }
10881 else
10882 {
10883 loc = plt->contents + ent->plt.offset;
10884 bfd_put_32 (info->output_bfd, val, loc);
10885 continue;
10886 }
10887 }
10888
10889 rela.r_offset = (ent->plt.offset
10890 + plt->output_offset
10891 + plt->output_section->vma);
10892 rela.r_addend = val;
10893 loc = relplt->contents + (relplt->reloc_count++
10894 * sizeof (Elf32_External_Rela));
10895 bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc);
10896 }
10897 if ((ent->glink_offset & 1) == 0)
10898 {
10899 unsigned char *p = ((unsigned char *) htab->glink->contents
10900 + ent->glink_offset);
10901
10902 write_glink_stub (NULL, ent, htab->elf.iplt, p, info);
10903 ent->glink_offset |= 1;
10904 }
10905 }
10906
10907 if (local_syms != NULL
10908 && symtab_hdr->contents != (unsigned char *) local_syms)
10909 {
10910 if (!info->keep_memory)
10911 free (local_syms);
10912 else
10913 symtab_hdr->contents = (unsigned char *) local_syms;
10914 }
10915 }
10916 return TRUE;
10917 }
10918
10919 /* Finish up dynamic symbol handling. We set the contents of various
10920 dynamic sections here. */
10921
10922 static bfd_boolean
10923 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10924 struct bfd_link_info *info,
10925 struct elf_link_hash_entry *h,
10926 Elf_Internal_Sym *sym)
10927 {
10928 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10929 struct plt_entry *ent;
10930
10931 #ifdef DEBUG
10932 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10933 h->root.root.string);
10934 #endif
10935
10936 if (!h->def_regular
10937 || (h->type == STT_GNU_IFUNC && !bfd_link_pic (info)))
10938 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10939 if (ent->plt.offset != (bfd_vma) -1)
10940 {
10941 if (!h->def_regular)
10942 {
10943 /* Mark the symbol as undefined, rather than as
10944 defined in the .plt section. Leave the value if
10945 there were any relocations where pointer equality
10946 matters (this is a clue for the dynamic linker, to
10947 make function pointer comparisons work between an
10948 application and shared library), otherwise set it
10949 to zero. */
10950 sym->st_shndx = SHN_UNDEF;
10951 if (!h->pointer_equality_needed)
10952 sym->st_value = 0;
10953 else if (!h->ref_regular_nonweak)
10954 {
10955 /* This breaks function pointer comparisons, but
10956 that is better than breaking tests for a NULL
10957 function pointer. */
10958 sym->st_value = 0;
10959 }
10960 }
10961 else
10962 {
10963 /* Set the value of ifunc symbols in a non-pie
10964 executable to the glink entry. This is to avoid
10965 text relocations. We can't do this for ifunc in
10966 allocate_dynrelocs, as we do for normal dynamic
10967 function symbols with plt entries, because we need
10968 to keep the original value around for the ifunc
10969 relocation. */
10970 sym->st_shndx
10971 = (_bfd_elf_section_from_bfd_section
10972 (info->output_bfd, htab->glink->output_section));
10973 sym->st_value = (ent->glink_offset
10974 + htab->glink->output_offset
10975 + htab->glink->output_section->vma);
10976 }
10977 break;
10978 }
10979
10980 if (h->needs_copy)
10981 {
10982 asection *s;
10983 Elf_Internal_Rela rela;
10984 bfd_byte *loc;
10985
10986 /* This symbols needs a copy reloc. Set it up. */
10987
10988 #ifdef DEBUG
10989 fprintf (stderr, ", copy");
10990 #endif
10991
10992 BFD_ASSERT (h->dynindx != -1);
10993
10994 if (ppc_elf_hash_entry (h)->has_sda_refs)
10995 s = htab->relsbss;
10996 else if (h->root.u.def.section == htab->elf.sdynrelro)
10997 s = htab->elf.sreldynrelro;
10998 else
10999 s = htab->elf.srelbss;
11000 BFD_ASSERT (s != NULL);
11001
11002 rela.r_offset = SYM_VAL (h);
11003 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
11004 rela.r_addend = 0;
11005 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
11006 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11007 }
11008
11009 #ifdef DEBUG
11010 fprintf (stderr, "\n");
11011 #endif
11012
11013 return TRUE;
11014 }
11015 \f
11016 static enum elf_reloc_type_class
11017 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
11018 const asection *rel_sec,
11019 const Elf_Internal_Rela *rela)
11020 {
11021 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
11022
11023 if (rel_sec == htab->elf.irelplt)
11024 return reloc_class_ifunc;
11025
11026 switch (ELF32_R_TYPE (rela->r_info))
11027 {
11028 case R_PPC_RELATIVE:
11029 return reloc_class_relative;
11030 case R_PPC_JMP_SLOT:
11031 return reloc_class_plt;
11032 case R_PPC_COPY:
11033 return reloc_class_copy;
11034 default:
11035 return reloc_class_normal;
11036 }
11037 }
11038 \f
11039 /* Finish up the dynamic sections. */
11040
11041 static bfd_boolean
11042 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
11043 struct bfd_link_info *info)
11044 {
11045 asection *sdyn;
11046 struct ppc_elf_link_hash_table *htab;
11047 bfd_vma got;
11048 bfd *dynobj;
11049 bfd_boolean ret = TRUE;
11050
11051 #ifdef DEBUG
11052 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
11053 #endif
11054
11055 htab = ppc_elf_hash_table (info);
11056 dynobj = htab->elf.dynobj;
11057 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
11058
11059 got = 0;
11060 if (htab->elf.hgot != NULL)
11061 got = SYM_VAL (htab->elf.hgot);
11062
11063 if (htab->elf.dynamic_sections_created)
11064 {
11065 Elf32_External_Dyn *dyncon, *dynconend;
11066
11067 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
11068
11069 dyncon = (Elf32_External_Dyn *) sdyn->contents;
11070 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
11071 for (; dyncon < dynconend; dyncon++)
11072 {
11073 Elf_Internal_Dyn dyn;
11074 asection *s;
11075
11076 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
11077
11078 switch (dyn.d_tag)
11079 {
11080 case DT_PLTGOT:
11081 if (htab->is_vxworks)
11082 s = htab->elf.sgotplt;
11083 else
11084 s = htab->elf.splt;
11085 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11086 break;
11087
11088 case DT_PLTRELSZ:
11089 dyn.d_un.d_val = htab->elf.srelplt->size;
11090 break;
11091
11092 case DT_JMPREL:
11093 s = htab->elf.srelplt;
11094 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
11095 break;
11096
11097 case DT_PPC_GOT:
11098 dyn.d_un.d_ptr = got;
11099 break;
11100
11101 case DT_TEXTREL:
11102 if (htab->local_ifunc_resolver)
11103 info->callbacks->einfo
11104 (_("%X%P: text relocations and GNU indirect "
11105 "functions will result in a segfault at runtime\n"));
11106 else if (htab->maybe_local_ifunc_resolver)
11107 info->callbacks->einfo
11108 (_("%P: warning: text relocations and GNU indirect "
11109 "functions may result in a segfault at runtime\n"));
11110 continue;
11111
11112 default:
11113 if (htab->is_vxworks
11114 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
11115 break;
11116 continue;
11117 }
11118
11119 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
11120 }
11121 }
11122
11123 if (htab->elf.sgot != NULL
11124 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
11125 {
11126 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
11127 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
11128 {
11129 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
11130
11131 p += htab->elf.hgot->root.u.def.value;
11132 if (htab->plt_type == PLT_OLD)
11133 {
11134 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
11135 so that a function can easily find the address of
11136 _GLOBAL_OFFSET_TABLE_. */
11137 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
11138 < htab->elf.hgot->root.u.def.section->size);
11139 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
11140 }
11141
11142 if (sdyn != NULL)
11143 {
11144 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
11145 BFD_ASSERT (htab->elf.hgot->root.u.def.value
11146 < htab->elf.hgot->root.u.def.section->size);
11147 bfd_put_32 (output_bfd, val, p);
11148 }
11149 }
11150 else
11151 {
11152 /* xgettext:c-format */
11153 _bfd_error_handler (_("%s not defined in linker created %pA"),
11154 htab->elf.hgot->root.root.string,
11155 (htab->elf.sgotplt != NULL
11156 ? htab->elf.sgotplt : htab->elf.sgot));
11157 bfd_set_error (bfd_error_bad_value);
11158 ret = FALSE;
11159 }
11160
11161 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
11162 }
11163
11164 /* Fill in the first entry in the VxWorks procedure linkage table. */
11165 if (htab->is_vxworks
11166 && htab->elf.splt != NULL
11167 && htab->elf.splt->size != 0
11168 && htab->elf.splt->output_section != bfd_abs_section_ptr)
11169 {
11170 asection *splt = htab->elf.splt;
11171 /* Use the right PLT. */
11172 const bfd_vma *plt_entry = (bfd_link_pic (info)
11173 ? ppc_elf_vxworks_pic_plt0_entry
11174 : ppc_elf_vxworks_plt0_entry);
11175
11176 if (!bfd_link_pic (info))
11177 {
11178 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
11179
11180 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
11181 splt->contents + 0);
11182 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
11183 splt->contents + 4);
11184 }
11185 else
11186 {
11187 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
11188 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
11189 }
11190 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
11191 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
11192 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
11193 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
11194 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
11195 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
11196
11197 if (! bfd_link_pic (info))
11198 {
11199 Elf_Internal_Rela rela;
11200 bfd_byte *loc;
11201
11202 loc = htab->srelplt2->contents;
11203
11204 /* Output the @ha relocation for the first instruction. */
11205 rela.r_offset = (htab->elf.splt->output_section->vma
11206 + htab->elf.splt->output_offset
11207 + 2);
11208 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
11209 rela.r_addend = 0;
11210 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11211 loc += sizeof (Elf32_External_Rela);
11212
11213 /* Output the @l relocation for the second instruction. */
11214 rela.r_offset = (htab->elf.splt->output_section->vma
11215 + htab->elf.splt->output_offset
11216 + 6);
11217 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
11218 rela.r_addend = 0;
11219 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
11220 loc += sizeof (Elf32_External_Rela);
11221
11222 /* Fix up the remaining relocations. They may have the wrong
11223 symbol index for _G_O_T_ or _P_L_T_ depending on the order
11224 in which symbols were output. */
11225 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
11226 {
11227 Elf_Internal_Rela rel;
11228
11229 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11230 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
11231 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11232 loc += sizeof (Elf32_External_Rela);
11233
11234 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11235 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
11236 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11237 loc += sizeof (Elf32_External_Rela);
11238
11239 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
11240 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
11241 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
11242 loc += sizeof (Elf32_External_Rela);
11243 }
11244 }
11245 }
11246
11247 if (htab->glink != NULL
11248 && htab->glink->contents != NULL
11249 && htab->elf.dynamic_sections_created)
11250 {
11251 unsigned char *p;
11252 unsigned char *endp;
11253 bfd_vma res0;
11254
11255 /*
11256 * PIC glink code is the following:
11257 *
11258 * # ith PLT code stub.
11259 * addis 11,30,(plt+(i-1)*4-got)@ha
11260 * lwz 11,(plt+(i-1)*4-got)@l(11)
11261 * mtctr 11
11262 * bctr
11263 *
11264 * # A table of branches, one for each plt entry.
11265 * # The idea is that the plt call stub loads ctr and r11 with these
11266 * # addresses, so (r11 - res_0) gives the plt index * 4.
11267 * res_0: b PLTresolve
11268 * res_1: b PLTresolve
11269 * .
11270 * # Some number of entries towards the end can be nops
11271 * res_n_m3: nop
11272 * res_n_m2: nop
11273 * res_n_m1:
11274 *
11275 * PLTresolve:
11276 * addis 11,11,(1f-res_0)@ha
11277 * mflr 0
11278 * bcl 20,31,1f
11279 * 1: addi 11,11,(1b-res_0)@l
11280 * mflr 12
11281 * mtlr 0
11282 * sub 11,11,12 # r11 = index * 4
11283 * addis 12,12,(got+4-1b)@ha
11284 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
11285 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
11286 * mtctr 0
11287 * add 0,11,11
11288 * add 11,0,11 # r11 = index * 12 = reloc offset.
11289 * bctr
11290 *
11291 * Non-PIC glink code is a little simpler.
11292 *
11293 * # ith PLT code stub.
11294 * lis 11,(plt+(i-1)*4)@ha
11295 * lwz 11,(plt+(i-1)*4)@l(11)
11296 * mtctr 11
11297 * bctr
11298 *
11299 * The branch table is the same, then comes
11300 *
11301 * PLTresolve:
11302 * lis 12,(got+4)@ha
11303 * addis 11,11,(-res_0)@ha
11304 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
11305 * addi 11,11,(-res_0)@l # r11 = index * 4
11306 * mtctr 0
11307 * add 0,11,11
11308 * lwz 12,(got+8)@l(12) # got[2] contains the map address
11309 * add 11,0,11 # r11 = index * 12 = reloc offset.
11310 * bctr
11311 */
11312
11313 /* Build the branch table, one for each plt entry (less one),
11314 and perhaps some padding. */
11315 p = htab->glink->contents;
11316 p += htab->glink_pltresolve;
11317 endp = htab->glink->contents;
11318 endp += htab->glink->size - GLINK_PLTRESOLVE;
11319 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
11320 {
11321 bfd_put_32 (output_bfd, B + endp - p, p);
11322 p += 4;
11323 }
11324 while (p < endp)
11325 {
11326 bfd_put_32 (output_bfd, NOP, p);
11327 p += 4;
11328 }
11329
11330 res0 = (htab->glink_pltresolve
11331 + htab->glink->output_section->vma
11332 + htab->glink->output_offset);
11333
11334 if (htab->params->ppc476_workaround)
11335 {
11336 /* Ensure that a call stub at the end of a page doesn't
11337 result in prefetch over the end of the page into the
11338 glink branch table. */
11339 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
11340 bfd_vma page_addr;
11341 bfd_vma glink_start = (htab->glink->output_section->vma
11342 + htab->glink->output_offset);
11343
11344 for (page_addr = res0 & -pagesize;
11345 page_addr > glink_start;
11346 page_addr -= pagesize)
11347 {
11348 /* We have a plt call stub that may need fixing. */
11349 bfd_byte *loc;
11350 unsigned int insn;
11351
11352 loc = htab->glink->contents + page_addr - 4 - glink_start;
11353 insn = bfd_get_32 (output_bfd, loc);
11354 if (insn == BCTR)
11355 {
11356 /* By alignment, we know that there must be at least
11357 one other call stub before this one. */
11358 insn = bfd_get_32 (output_bfd, loc - 16);
11359 if (insn == BCTR)
11360 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
11361 else
11362 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
11363 }
11364 }
11365 }
11366
11367 /* Last comes the PLTresolve stub. */
11368 endp = p + GLINK_PLTRESOLVE;
11369 if (bfd_link_pic (info))
11370 {
11371 bfd_vma bcl;
11372
11373 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
11374 + htab->glink->output_section->vma
11375 + htab->glink->output_offset);
11376
11377 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (bcl - res0), p);
11378 p += 4;
11379 bfd_put_32 (output_bfd, MFLR_0, p);
11380 p += 4;
11381 bfd_put_32 (output_bfd, BCL_20_31, p);
11382 p += 4;
11383 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (bcl - res0), p);
11384 p += 4;
11385 bfd_put_32 (output_bfd, MFLR_12, p);
11386 p += 4;
11387 bfd_put_32 (output_bfd, MTLR_0, p);
11388 p += 4;
11389 bfd_put_32 (output_bfd, SUB_11_11_12, p);
11390 p += 4;
11391 bfd_put_32 (output_bfd, ADDIS_12_12 + PPC_HA (got + 4 - bcl), p);
11392 p += 4;
11393 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
11394 {
11395 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4 - bcl), p);
11396 p += 4;
11397 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8 - bcl), p);
11398 p += 4;
11399 }
11400 else
11401 {
11402 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4 - bcl), p);
11403 p += 4;
11404 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
11405 p += 4;
11406 }
11407 bfd_put_32 (output_bfd, MTCTR_0, p);
11408 p += 4;
11409 bfd_put_32 (output_bfd, ADD_0_11_11, p);
11410 }
11411 else
11412 {
11413 bfd_put_32 (output_bfd, LIS_12 + PPC_HA (got + 4), p);
11414 p += 4;
11415 bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (-res0), p);
11416 p += 4;
11417 if (PPC_HA (got + 4) == PPC_HA (got + 8))
11418 bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4), p);
11419 else
11420 bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4), p);
11421 p += 4;
11422 bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (-res0), p);
11423 p += 4;
11424 bfd_put_32 (output_bfd, MTCTR_0, p);
11425 p += 4;
11426 bfd_put_32 (output_bfd, ADD_0_11_11, p);
11427 p += 4;
11428 if (PPC_HA (got + 4) == PPC_HA (got + 8))
11429 bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8), p);
11430 else
11431 bfd_put_32 (output_bfd, LWZ_12_12 + 4, p);
11432 }
11433 p += 4;
11434 bfd_put_32 (output_bfd, ADD_11_0_11, p);
11435 p += 4;
11436 bfd_put_32 (output_bfd, BCTR, p);
11437 p += 4;
11438 while (p < endp)
11439 {
11440 bfd_put_32 (output_bfd,
11441 htab->params->ppc476_workaround ? BA : NOP, p);
11442 p += 4;
11443 }
11444 BFD_ASSERT (p == endp);
11445 }
11446
11447 if (htab->glink_eh_frame != NULL
11448 && htab->glink_eh_frame->contents != NULL)
11449 {
11450 unsigned char *p = htab->glink_eh_frame->contents;
11451 bfd_vma val;
11452
11453 p += sizeof (glink_eh_frame_cie);
11454 /* FDE length. */
11455 p += 4;
11456 /* CIE pointer. */
11457 p += 4;
11458 /* Offset to .glink. */
11459 val = (htab->glink->output_section->vma
11460 + htab->glink->output_offset);
11461 val -= (htab->glink_eh_frame->output_section->vma
11462 + htab->glink_eh_frame->output_offset);
11463 val -= p - htab->glink_eh_frame->contents;
11464 bfd_put_32 (htab->elf.dynobj, val, p);
11465
11466 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
11467 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
11468 htab->glink_eh_frame,
11469 htab->glink_eh_frame->contents))
11470 return FALSE;
11471 }
11472
11473 return ret;
11474 }
11475 \f
11476 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
11477 #define TARGET_LITTLE_NAME "elf32-powerpcle"
11478 #define TARGET_BIG_SYM powerpc_elf32_vec
11479 #define TARGET_BIG_NAME "elf32-powerpc"
11480 #define ELF_ARCH bfd_arch_powerpc
11481 #define ELF_TARGET_ID PPC32_ELF_DATA
11482 #define ELF_MACHINE_CODE EM_PPC
11483 #define ELF_MAXPAGESIZE 0x10000
11484 #define ELF_COMMONPAGESIZE 0x1000
11485 #define ELF_RELROPAGESIZE ELF_MAXPAGESIZE
11486 #define elf_info_to_howto ppc_elf_info_to_howto
11487
11488 #ifdef EM_CYGNUS_POWERPC
11489 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
11490 #endif
11491
11492 #ifdef EM_PPC_OLD
11493 #define ELF_MACHINE_ALT2 EM_PPC_OLD
11494 #endif
11495
11496 #define elf_backend_plt_not_loaded 1
11497 #define elf_backend_want_dynrelro 1
11498 #define elf_backend_can_gc_sections 1
11499 #define elf_backend_can_refcount 1
11500 #define elf_backend_rela_normal 1
11501 #define elf_backend_caches_rawsize 1
11502
11503 #define bfd_elf32_mkobject ppc_elf_mkobject
11504 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
11505 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
11506 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
11507 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
11508 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
11509 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
11510 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
11511
11512 #define elf_backend_object_p ppc_elf_object_p
11513 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
11514 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
11515 #define elf_backend_relocate_section ppc_elf_relocate_section
11516 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
11517 #define elf_backend_check_relocs ppc_elf_check_relocs
11518 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
11519 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
11520 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
11521 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
11522 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
11523 #define elf_backend_hash_symbol ppc_elf_hash_symbol
11524 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
11525 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
11526 #define elf_backend_fake_sections ppc_elf_fake_sections
11527 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
11528 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
11529 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
11530 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
11531 #define elf_backend_write_core_note ppc_elf_write_core_note
11532 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
11533 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
11534 #define elf_backend_final_write_processing ppc_elf_final_write_processing
11535 #define elf_backend_write_section ppc_elf_write_section
11536 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
11537 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
11538 #define elf_backend_action_discarded ppc_elf_action_discarded
11539 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
11540 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
11541
11542 #include "elf32-target.h"
11543
11544 /* FreeBSD Target */
11545
11546 #undef TARGET_LITTLE_SYM
11547 #undef TARGET_LITTLE_NAME
11548
11549 #undef TARGET_BIG_SYM
11550 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
11551 #undef TARGET_BIG_NAME
11552 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
11553
11554 #undef ELF_OSABI
11555 #define ELF_OSABI ELFOSABI_FREEBSD
11556
11557 #undef elf32_bed
11558 #define elf32_bed elf32_powerpc_fbsd_bed
11559
11560 #include "elf32-target.h"
11561
11562 /* VxWorks Target */
11563
11564 #undef TARGET_LITTLE_SYM
11565 #undef TARGET_LITTLE_NAME
11566
11567 #undef TARGET_BIG_SYM
11568 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
11569 #undef TARGET_BIG_NAME
11570 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
11571
11572 #undef ELF_OSABI
11573
11574 /* VxWorks uses the elf default section flags for .plt. */
11575 static const struct bfd_elf_special_section *
11576 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
11577 {
11578 if (sec->name == NULL)
11579 return NULL;
11580
11581 if (strcmp (sec->name, ".plt") == 0)
11582 return _bfd_elf_get_sec_type_attr (abfd, sec);
11583
11584 return ppc_elf_get_sec_type_attr (abfd, sec);
11585 }
11586
11587 /* Like ppc_elf_link_hash_table_create, but overrides
11588 appropriately for VxWorks. */
11589 static struct bfd_link_hash_table *
11590 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11591 {
11592 struct bfd_link_hash_table *ret;
11593
11594 ret = ppc_elf_link_hash_table_create (abfd);
11595 if (ret)
11596 {
11597 struct ppc_elf_link_hash_table *htab
11598 = (struct ppc_elf_link_hash_table *)ret;
11599 htab->is_vxworks = 1;
11600 htab->plt_type = PLT_VXWORKS;
11601 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11602 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11603 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11604 }
11605 return ret;
11606 }
11607
11608 /* Tweak magic VxWorks symbols as they are loaded. */
11609 static bfd_boolean
11610 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11611 struct bfd_link_info *info,
11612 Elf_Internal_Sym *sym,
11613 const char **namep,
11614 flagword *flagsp,
11615 asection **secp,
11616 bfd_vma *valp)
11617 {
11618 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
11619 valp))
11620 return FALSE;
11621
11622 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
11623 }
11624
11625 static void
11626 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11627 {
11628 ppc_elf_final_write_processing (abfd, linker);
11629 elf_vxworks_final_write_processing (abfd, linker);
11630 }
11631
11632 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11633 define it. */
11634 #undef elf_backend_want_plt_sym
11635 #define elf_backend_want_plt_sym 1
11636 #undef elf_backend_want_got_plt
11637 #define elf_backend_want_got_plt 1
11638 #undef elf_backend_got_symbol_offset
11639 #define elf_backend_got_symbol_offset 0
11640 #undef elf_backend_plt_not_loaded
11641 #define elf_backend_plt_not_loaded 0
11642 #undef elf_backend_plt_readonly
11643 #define elf_backend_plt_readonly 1
11644 #undef elf_backend_got_header_size
11645 #define elf_backend_got_header_size 12
11646 #undef elf_backend_dtrel_excludes_plt
11647 #define elf_backend_dtrel_excludes_plt 1
11648
11649 #undef bfd_elf32_get_synthetic_symtab
11650
11651 #undef bfd_elf32_bfd_link_hash_table_create
11652 #define bfd_elf32_bfd_link_hash_table_create \
11653 ppc_elf_vxworks_link_hash_table_create
11654 #undef elf_backend_add_symbol_hook
11655 #define elf_backend_add_symbol_hook \
11656 ppc_elf_vxworks_add_symbol_hook
11657 #undef elf_backend_link_output_symbol_hook
11658 #define elf_backend_link_output_symbol_hook \
11659 elf_vxworks_link_output_symbol_hook
11660 #undef elf_backend_final_write_processing
11661 #define elf_backend_final_write_processing \
11662 ppc_elf_vxworks_final_write_processing
11663 #undef elf_backend_get_sec_type_attr
11664 #define elf_backend_get_sec_type_attr \
11665 ppc_elf_vxworks_get_sec_type_attr
11666 #undef elf_backend_emit_relocs
11667 #define elf_backend_emit_relocs \
11668 elf_vxworks_emit_relocs
11669
11670 #undef elf32_bed
11671 #define elf32_bed ppc_elf_vxworks_bed
11672 #undef elf_backend_post_process_headers
11673
11674 #include "elf32-target.h"
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