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[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2016 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38
39 typedef enum split16_format_type
40 {
41 split16a_type = 0,
42 split16d_type
43 }
44 split16_format_type;
45
46 /* RELA relocations are used here. */
47
48 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
50 static bfd_reloc_status_type ppc_elf_unhandled_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52
53 /* Branch prediction bit for branch taken relocs. */
54 #define BRANCH_PREDICT_BIT 0x200000
55 /* Mask to set RA in memory instructions. */
56 #define RA_REGISTER_MASK 0x001f0000
57 /* Value to shift register by to insert RA. */
58 #define RA_REGISTER_SHIFT 16
59
60 /* The name of the dynamic interpreter. This is put in the .interp
61 section. */
62 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
63
64 /* For old-style PLT. */
65 /* The number of single-slot PLT entries (the rest use two slots). */
66 #define PLT_NUM_SINGLE_ENTRIES 8192
67
68 /* For new-style .glink and .plt. */
69 #define GLINK_PLTRESOLVE 16*4
70 #define GLINK_ENTRY_SIZE 4*4
71 #define TLS_GET_ADDR_GLINK_SIZE 12*4
72
73 /* VxWorks uses its own plt layout, filled in by the static linker. */
74
75 /* The standard VxWorks PLT entry. */
76 #define VXWORKS_PLT_ENTRY_SIZE 32
77 static const bfd_vma ppc_elf_vxworks_plt_entry
78 [VXWORKS_PLT_ENTRY_SIZE / 4] =
79 {
80 0x3d800000, /* lis r12,0 */
81 0x818c0000, /* lwz r12,0(r12) */
82 0x7d8903a6, /* mtctr r12 */
83 0x4e800420, /* bctr */
84 0x39600000, /* li r11,0 */
85 0x48000000, /* b 14 <.PLT0resolve+0x4> */
86 0x60000000, /* nop */
87 0x60000000, /* nop */
88 };
89 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
90 [VXWORKS_PLT_ENTRY_SIZE / 4] =
91 {
92 0x3d9e0000, /* addis r12,r30,0 */
93 0x818c0000, /* lwz r12,0(r12) */
94 0x7d8903a6, /* mtctr r12 */
95 0x4e800420, /* bctr */
96 0x39600000, /* li r11,0 */
97 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
98 0x60000000, /* nop */
99 0x60000000, /* nop */
100 };
101
102 /* The initial VxWorks PLT entry. */
103 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
104 static const bfd_vma ppc_elf_vxworks_plt0_entry
105 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
106 {
107 0x3d800000, /* lis r12,0 */
108 0x398c0000, /* addi r12,r12,0 */
109 0x800c0008, /* lwz r0,8(r12) */
110 0x7c0903a6, /* mtctr r0 */
111 0x818c0004, /* lwz r12,4(r12) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 };
116 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
117 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
118 {
119 0x819e0008, /* lwz r12,8(r30) */
120 0x7d8903a6, /* mtctr r12 */
121 0x819e0004, /* lwz r12,4(r30) */
122 0x4e800420, /* bctr */
123 0x60000000, /* nop */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 };
128
129 /* For executables, we have some additional relocations in
130 .rela.plt.unloaded, for the kernel loader. */
131
132 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
133 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
134 /* The number of relocations in the PLTResolve slot. */
135 #define VXWORKS_PLTRESOLVE_RELOCS 2
136 /* The number of relocations in the PLTResolve slot when when creating
137 a shared library. */
138 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
139
140 /* Some instructions. */
141 #define ADDIS_11_11 0x3d6b0000
142 #define ADDIS_11_30 0x3d7e0000
143 #define ADDIS_12_12 0x3d8c0000
144 #define ADDI_11_11 0x396b0000
145 #define ADD_0_11_11 0x7c0b5a14
146 #define ADD_3_12_2 0x7c6c1214
147 #define ADD_11_0_11 0x7d605a14
148 #define B 0x48000000
149 #define BA 0x48000002
150 #define BCL_20_31 0x429f0005
151 #define BCTR 0x4e800420
152 #define BEQLR 0x4d820020
153 #define CMPWI_11_0 0x2c0b0000
154 #define LIS_11 0x3d600000
155 #define LIS_12 0x3d800000
156 #define LWZU_0_12 0x840c0000
157 #define LWZ_0_12 0x800c0000
158 #define LWZ_11_3 0x81630000
159 #define LWZ_11_11 0x816b0000
160 #define LWZ_11_30 0x817e0000
161 #define LWZ_12_3 0x81830000
162 #define LWZ_12_12 0x818c0000
163 #define MR_0_3 0x7c601b78
164 #define MR_3_0 0x7c030378
165 #define MFLR_0 0x7c0802a6
166 #define MFLR_12 0x7d8802a6
167 #define MTCTR_0 0x7c0903a6
168 #define MTCTR_11 0x7d6903a6
169 #define MTLR_0 0x7c0803a6
170 #define NOP 0x60000000
171 #define SUB_11_11_12 0x7d6c5850
172
173 /* Offset of tp and dtp pointers from start of TLS block. */
174 #define TP_OFFSET 0x7000
175 #define DTP_OFFSET 0x8000
176
177 /* The value of a defined global symbol. */
178 #define SYM_VAL(SYM) \
179 ((SYM)->root.u.def.section->output_section->vma \
180 + (SYM)->root.u.def.section->output_offset \
181 + (SYM)->root.u.def.value)
182 \f
183 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
184
185 static reloc_howto_type ppc_elf_howto_raw[] = {
186 /* This reloc does nothing. */
187 HOWTO (R_PPC_NONE, /* type */
188 0, /* rightshift */
189 3, /* size (0 = byte, 1 = short, 2 = long) */
190 0, /* bitsize */
191 FALSE, /* pc_relative */
192 0, /* bitpos */
193 complain_overflow_dont, /* complain_on_overflow */
194 bfd_elf_generic_reloc, /* special_function */
195 "R_PPC_NONE", /* name */
196 FALSE, /* partial_inplace */
197 0, /* src_mask */
198 0, /* dst_mask */
199 FALSE), /* pcrel_offset */
200
201 /* A standard 32 bit relocation. */
202 HOWTO (R_PPC_ADDR32, /* type */
203 0, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 32, /* bitsize */
206 FALSE, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_dont, /* complain_on_overflow */
209 bfd_elf_generic_reloc, /* special_function */
210 "R_PPC_ADDR32", /* name */
211 FALSE, /* partial_inplace */
212 0, /* src_mask */
213 0xffffffff, /* dst_mask */
214 FALSE), /* pcrel_offset */
215
216 /* An absolute 26 bit branch; the lower two bits must be zero.
217 FIXME: we don't check that, we just clear them. */
218 HOWTO (R_PPC_ADDR24, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 26, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_signed, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_PPC_ADDR24", /* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0x3fffffc, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* A standard 16 bit relocation. */
233 HOWTO (R_PPC_ADDR16, /* type */
234 0, /* rightshift */
235 1, /* size (0 = byte, 1 = short, 2 = long) */
236 16, /* bitsize */
237 FALSE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_bitfield, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_PPC_ADDR16", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0xffff, /* dst_mask */
245 FALSE), /* pcrel_offset */
246
247 /* A 16 bit relocation without overflow. */
248 HOWTO (R_PPC_ADDR16_LO, /* type */
249 0, /* rightshift */
250 1, /* size (0 = byte, 1 = short, 2 = long) */
251 16, /* bitsize */
252 FALSE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_dont,/* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_PPC_ADDR16_LO", /* name */
257 FALSE, /* partial_inplace */
258 0, /* src_mask */
259 0xffff, /* dst_mask */
260 FALSE), /* pcrel_offset */
261
262 /* The high order 16 bits of an address. */
263 HOWTO (R_PPC_ADDR16_HI, /* type */
264 16, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_dont, /* complain_on_overflow */
270 bfd_elf_generic_reloc, /* special_function */
271 "R_PPC_ADDR16_HI", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* The high order 16 bits of an address, plus 1 if the contents of
278 the low 16 bits, treated as a signed number, is negative. */
279 HOWTO (R_PPC_ADDR16_HA, /* type */
280 16, /* rightshift */
281 1, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_dont, /* complain_on_overflow */
286 ppc_elf_addr16_ha_reloc, /* special_function */
287 "R_PPC_ADDR16_HA", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xffff, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* An absolute 16 bit branch; the lower two bits must be zero.
294 FIXME: we don't check that, we just clear them. */
295 HOWTO (R_PPC_ADDR14, /* type */
296 0, /* rightshift */
297 2, /* size (0 = byte, 1 = short, 2 = long) */
298 16, /* bitsize */
299 FALSE, /* pc_relative */
300 0, /* bitpos */
301 complain_overflow_signed, /* complain_on_overflow */
302 bfd_elf_generic_reloc, /* special_function */
303 "R_PPC_ADDR14", /* name */
304 FALSE, /* partial_inplace */
305 0, /* src_mask */
306 0xfffc, /* dst_mask */
307 FALSE), /* pcrel_offset */
308
309 /* An absolute 16 bit branch, for which bit 10 should be set to
310 indicate that the branch is expected to be taken. The lower two
311 bits must be zero. */
312 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
313 0, /* rightshift */
314 2, /* size (0 = byte, 1 = short, 2 = long) */
315 16, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_signed, /* complain_on_overflow */
319 bfd_elf_generic_reloc, /* special_function */
320 "R_PPC_ADDR14_BRTAKEN",/* name */
321 FALSE, /* partial_inplace */
322 0, /* src_mask */
323 0xfffc, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 /* An absolute 16 bit branch, for which bit 10 should be set to
327 indicate that the branch is not expected to be taken. The lower
328 two bits must be zero. */
329 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
330 0, /* rightshift */
331 2, /* size (0 = byte, 1 = short, 2 = long) */
332 16, /* bitsize */
333 FALSE, /* pc_relative */
334 0, /* bitpos */
335 complain_overflow_signed, /* complain_on_overflow */
336 bfd_elf_generic_reloc, /* special_function */
337 "R_PPC_ADDR14_BRNTAKEN",/* name */
338 FALSE, /* partial_inplace */
339 0, /* src_mask */
340 0xfffc, /* dst_mask */
341 FALSE), /* pcrel_offset */
342
343 /* A relative 26 bit branch; the lower two bits must be zero. */
344 HOWTO (R_PPC_REL24, /* type */
345 0, /* rightshift */
346 2, /* size (0 = byte, 1 = short, 2 = long) */
347 26, /* bitsize */
348 TRUE, /* pc_relative */
349 0, /* bitpos */
350 complain_overflow_signed, /* complain_on_overflow */
351 bfd_elf_generic_reloc, /* special_function */
352 "R_PPC_REL24", /* name */
353 FALSE, /* partial_inplace */
354 0, /* src_mask */
355 0x3fffffc, /* dst_mask */
356 TRUE), /* pcrel_offset */
357
358 /* A relative 16 bit branch; the lower two bits must be zero. */
359 HOWTO (R_PPC_REL14, /* type */
360 0, /* rightshift */
361 2, /* size (0 = byte, 1 = short, 2 = long) */
362 16, /* bitsize */
363 TRUE, /* pc_relative */
364 0, /* bitpos */
365 complain_overflow_signed, /* complain_on_overflow */
366 bfd_elf_generic_reloc, /* special_function */
367 "R_PPC_REL14", /* name */
368 FALSE, /* partial_inplace */
369 0, /* src_mask */
370 0xfffc, /* dst_mask */
371 TRUE), /* pcrel_offset */
372
373 /* A relative 16 bit branch. Bit 10 should be set to indicate that
374 the branch is expected to be taken. The lower two bits must be
375 zero. */
376 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
377 0, /* rightshift */
378 2, /* size (0 = byte, 1 = short, 2 = long) */
379 16, /* bitsize */
380 TRUE, /* pc_relative */
381 0, /* bitpos */
382 complain_overflow_signed, /* complain_on_overflow */
383 bfd_elf_generic_reloc, /* special_function */
384 "R_PPC_REL14_BRTAKEN", /* name */
385 FALSE, /* partial_inplace */
386 0, /* src_mask */
387 0xfffc, /* dst_mask */
388 TRUE), /* pcrel_offset */
389
390 /* A relative 16 bit branch. Bit 10 should be set to indicate that
391 the branch is not expected to be taken. The lower two bits must
392 be zero. */
393 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
394 0, /* rightshift */
395 2, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 TRUE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 bfd_elf_generic_reloc, /* special_function */
401 "R_PPC_REL14_BRNTAKEN",/* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0xfffc, /* dst_mask */
405 TRUE), /* pcrel_offset */
406
407 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
408 symbol. */
409 HOWTO (R_PPC_GOT16, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_signed, /* complain_on_overflow */
416 ppc_elf_unhandled_reloc, /* special_function */
417 "R_PPC_GOT16", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
424 the symbol. */
425 HOWTO (R_PPC_GOT16_LO, /* type */
426 0, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_dont, /* complain_on_overflow */
432 ppc_elf_unhandled_reloc, /* special_function */
433 "R_PPC_GOT16_LO", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
440 the symbol. */
441 HOWTO (R_PPC_GOT16_HI, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_dont, /* complain_on_overflow */
448 ppc_elf_unhandled_reloc, /* special_function */
449 "R_PPC_GOT16_HI", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
456 the symbol. */
457 HOWTO (R_PPC_GOT16_HA, /* type */
458 16, /* rightshift */
459 1, /* size (0 = byte, 1 = short, 2 = long) */
460 16, /* bitsize */
461 FALSE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_dont, /* complain_on_overflow */
464 ppc_elf_unhandled_reloc, /* special_function */
465 "R_PPC_GOT16_HA", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
470
471 /* Like R_PPC_REL24, but referring to the procedure linkage table
472 entry for the symbol. */
473 HOWTO (R_PPC_PLTREL24, /* type */
474 0, /* rightshift */
475 2, /* size (0 = byte, 1 = short, 2 = long) */
476 26, /* bitsize */
477 TRUE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_signed, /* complain_on_overflow */
480 ppc_elf_unhandled_reloc, /* special_function */
481 "R_PPC_PLTREL24", /* name */
482 FALSE, /* partial_inplace */
483 0, /* src_mask */
484 0x3fffffc, /* dst_mask */
485 TRUE), /* pcrel_offset */
486
487 /* This is used only by the dynamic linker. The symbol should exist
488 both in the object being run and in some shared library. The
489 dynamic linker copies the data addressed by the symbol from the
490 shared library into the object, because the object being
491 run has to have the data at some particular address. */
492 HOWTO (R_PPC_COPY, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 32, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_dont, /* complain_on_overflow */
499 ppc_elf_unhandled_reloc, /* special_function */
500 "R_PPC_COPY", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* Like R_PPC_ADDR32, but used when setting global offset table
507 entries. */
508 HOWTO (R_PPC_GLOB_DAT, /* type */
509 0, /* rightshift */
510 2, /* size (0 = byte, 1 = short, 2 = long) */
511 32, /* bitsize */
512 FALSE, /* pc_relative */
513 0, /* bitpos */
514 complain_overflow_dont, /* complain_on_overflow */
515 ppc_elf_unhandled_reloc, /* special_function */
516 "R_PPC_GLOB_DAT", /* name */
517 FALSE, /* partial_inplace */
518 0, /* src_mask */
519 0xffffffff, /* dst_mask */
520 FALSE), /* pcrel_offset */
521
522 /* Marks a procedure linkage table entry for a symbol. */
523 HOWTO (R_PPC_JMP_SLOT, /* type */
524 0, /* rightshift */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
526 32, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_dont, /* complain_on_overflow */
530 ppc_elf_unhandled_reloc, /* special_function */
531 "R_PPC_JMP_SLOT", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Used only by the dynamic linker. When the object is run, this
538 longword is set to the load address of the object, plus the
539 addend. */
540 HOWTO (R_PPC_RELATIVE, /* type */
541 0, /* rightshift */
542 2, /* size (0 = byte, 1 = short, 2 = long) */
543 32, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 bfd_elf_generic_reloc, /* special_function */
548 "R_PPC_RELATIVE", /* name */
549 FALSE, /* partial_inplace */
550 0, /* src_mask */
551 0xffffffff, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 /* Like R_PPC_REL24, but uses the value of the symbol within the
555 object rather than the final value. Normally used for
556 _GLOBAL_OFFSET_TABLE_. */
557 HOWTO (R_PPC_LOCAL24PC, /* type */
558 0, /* rightshift */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
560 26, /* bitsize */
561 TRUE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_signed, /* complain_on_overflow */
564 bfd_elf_generic_reloc, /* special_function */
565 "R_PPC_LOCAL24PC", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 0x3fffffc, /* dst_mask */
569 TRUE), /* pcrel_offset */
570
571 /* Like R_PPC_ADDR32, but may be unaligned. */
572 HOWTO (R_PPC_UADDR32, /* type */
573 0, /* rightshift */
574 2, /* size (0 = byte, 1 = short, 2 = long) */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_dont, /* complain_on_overflow */
579 bfd_elf_generic_reloc, /* special_function */
580 "R_PPC_UADDR32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* Like R_PPC_ADDR16, but may be unaligned. */
587 HOWTO (R_PPC_UADDR16, /* type */
588 0, /* rightshift */
589 1, /* size (0 = byte, 1 = short, 2 = long) */
590 16, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_bitfield, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC_UADDR16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 32-bit PC relative */
602 HOWTO (R_PPC_REL32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 TRUE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_dont, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC_REL32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0xffffffff, /* dst_mask */
614 TRUE), /* pcrel_offset */
615
616 /* 32-bit relocation to the symbol's procedure linkage table.
617 FIXME: not supported. */
618 HOWTO (R_PPC_PLT32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 FALSE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_dont, /* complain_on_overflow */
625 ppc_elf_unhandled_reloc, /* special_function */
626 "R_PPC_PLT32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0, /* dst_mask */
630 FALSE), /* pcrel_offset */
631
632 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
633 FIXME: not supported. */
634 HOWTO (R_PPC_PLTREL32, /* type */
635 0, /* rightshift */
636 2, /* size (0 = byte, 1 = short, 2 = long) */
637 32, /* bitsize */
638 TRUE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont, /* complain_on_overflow */
641 ppc_elf_unhandled_reloc, /* special_function */
642 "R_PPC_PLTREL32", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0, /* dst_mask */
646 TRUE), /* pcrel_offset */
647
648 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC_PLT16_LO, /* type */
651 0, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_dont, /* complain_on_overflow */
657 ppc_elf_unhandled_reloc, /* special_function */
658 "R_PPC_PLT16_LO", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC_PLT16_HI, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 ppc_elf_unhandled_reloc, /* special_function */
674 "R_PPC_PLT16_HI", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
681 the symbol. */
682 HOWTO (R_PPC_PLT16_HA, /* type */
683 16, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_dont, /* complain_on_overflow */
689 ppc_elf_unhandled_reloc, /* special_function */
690 "R_PPC_PLT16_HA", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
697 small data items. */
698 HOWTO (R_PPC_SDAREL16, /* type */
699 0, /* rightshift */
700 1, /* size (0 = byte, 1 = short, 2 = long) */
701 16, /* bitsize */
702 FALSE, /* pc_relative */
703 0, /* bitpos */
704 complain_overflow_signed, /* complain_on_overflow */
705 ppc_elf_unhandled_reloc, /* special_function */
706 "R_PPC_SDAREL16", /* name */
707 FALSE, /* partial_inplace */
708 0, /* src_mask */
709 0xffff, /* dst_mask */
710 FALSE), /* pcrel_offset */
711
712 /* 16-bit section relative relocation. */
713 HOWTO (R_PPC_SECTOFF, /* type */
714 0, /* rightshift */
715 1, /* size (0 = byte, 1 = short, 2 = long) */
716 16, /* bitsize */
717 FALSE, /* pc_relative */
718 0, /* bitpos */
719 complain_overflow_signed, /* complain_on_overflow */
720 ppc_elf_unhandled_reloc, /* special_function */
721 "R_PPC_SECTOFF", /* name */
722 FALSE, /* partial_inplace */
723 0, /* src_mask */
724 0xffff, /* dst_mask */
725 FALSE), /* pcrel_offset */
726
727 /* 16-bit lower half section relative relocation. */
728 HOWTO (R_PPC_SECTOFF_LO, /* type */
729 0, /* rightshift */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
731 16, /* bitsize */
732 FALSE, /* pc_relative */
733 0, /* bitpos */
734 complain_overflow_dont, /* complain_on_overflow */
735 ppc_elf_unhandled_reloc, /* special_function */
736 "R_PPC_SECTOFF_LO", /* name */
737 FALSE, /* partial_inplace */
738 0, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
741
742 /* 16-bit upper half section relative relocation. */
743 HOWTO (R_PPC_SECTOFF_HI, /* type */
744 16, /* rightshift */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
746 16, /* bitsize */
747 FALSE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 ppc_elf_unhandled_reloc, /* special_function */
751 "R_PPC_SECTOFF_HI", /* name */
752 FALSE, /* partial_inplace */
753 0, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE), /* pcrel_offset */
756
757 /* 16-bit upper half adjusted section relative relocation. */
758 HOWTO (R_PPC_SECTOFF_HA, /* type */
759 16, /* rightshift */
760 1, /* size (0 = byte, 1 = short, 2 = long) */
761 16, /* bitsize */
762 FALSE, /* pc_relative */
763 0, /* bitpos */
764 complain_overflow_dont, /* complain_on_overflow */
765 ppc_elf_unhandled_reloc, /* special_function */
766 "R_PPC_SECTOFF_HA", /* name */
767 FALSE, /* partial_inplace */
768 0, /* src_mask */
769 0xffff, /* dst_mask */
770 FALSE), /* pcrel_offset */
771
772 /* Marker relocs for TLS. */
773 HOWTO (R_PPC_TLS,
774 0, /* rightshift */
775 2, /* size (0 = byte, 1 = short, 2 = long) */
776 32, /* bitsize */
777 FALSE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont, /* complain_on_overflow */
780 bfd_elf_generic_reloc, /* special_function */
781 "R_PPC_TLS", /* name */
782 FALSE, /* partial_inplace */
783 0, /* src_mask */
784 0, /* dst_mask */
785 FALSE), /* pcrel_offset */
786
787 HOWTO (R_PPC_TLSGD,
788 0, /* rightshift */
789 2, /* size (0 = byte, 1 = short, 2 = long) */
790 32, /* bitsize */
791 FALSE, /* pc_relative */
792 0, /* bitpos */
793 complain_overflow_dont, /* complain_on_overflow */
794 bfd_elf_generic_reloc, /* special_function */
795 "R_PPC_TLSGD", /* name */
796 FALSE, /* partial_inplace */
797 0, /* src_mask */
798 0, /* dst_mask */
799 FALSE), /* pcrel_offset */
800
801 HOWTO (R_PPC_TLSLD,
802 0, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 32, /* bitsize */
805 FALSE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_dont, /* complain_on_overflow */
808 bfd_elf_generic_reloc, /* special_function */
809 "R_PPC_TLSLD", /* name */
810 FALSE, /* partial_inplace */
811 0, /* src_mask */
812 0, /* dst_mask */
813 FALSE), /* pcrel_offset */
814
815 /* Computes the load module index of the load module that contains the
816 definition of its TLS sym. */
817 HOWTO (R_PPC_DTPMOD32,
818 0, /* rightshift */
819 2, /* size (0 = byte, 1 = short, 2 = long) */
820 32, /* bitsize */
821 FALSE, /* pc_relative */
822 0, /* bitpos */
823 complain_overflow_dont, /* complain_on_overflow */
824 ppc_elf_unhandled_reloc, /* special_function */
825 "R_PPC_DTPMOD32", /* name */
826 FALSE, /* partial_inplace */
827 0, /* src_mask */
828 0xffffffff, /* dst_mask */
829 FALSE), /* pcrel_offset */
830
831 /* Computes a dtv-relative displacement, the difference between the value
832 of sym+add and the base address of the thread-local storage block that
833 contains the definition of sym, minus 0x8000. */
834 HOWTO (R_PPC_DTPREL32,
835 0, /* rightshift */
836 2, /* size (0 = byte, 1 = short, 2 = long) */
837 32, /* bitsize */
838 FALSE, /* pc_relative */
839 0, /* bitpos */
840 complain_overflow_dont, /* complain_on_overflow */
841 ppc_elf_unhandled_reloc, /* special_function */
842 "R_PPC_DTPREL32", /* name */
843 FALSE, /* partial_inplace */
844 0, /* src_mask */
845 0xffffffff, /* dst_mask */
846 FALSE), /* pcrel_offset */
847
848 /* A 16 bit dtprel reloc. */
849 HOWTO (R_PPC_DTPREL16,
850 0, /* rightshift */
851 1, /* size (0 = byte, 1 = short, 2 = long) */
852 16, /* bitsize */
853 FALSE, /* pc_relative */
854 0, /* bitpos */
855 complain_overflow_signed, /* complain_on_overflow */
856 ppc_elf_unhandled_reloc, /* special_function */
857 "R_PPC_DTPREL16", /* name */
858 FALSE, /* partial_inplace */
859 0, /* src_mask */
860 0xffff, /* dst_mask */
861 FALSE), /* pcrel_offset */
862
863 /* Like DTPREL16, but no overflow. */
864 HOWTO (R_PPC_DTPREL16_LO,
865 0, /* rightshift */
866 1, /* size (0 = byte, 1 = short, 2 = long) */
867 16, /* bitsize */
868 FALSE, /* pc_relative */
869 0, /* bitpos */
870 complain_overflow_dont, /* complain_on_overflow */
871 ppc_elf_unhandled_reloc, /* special_function */
872 "R_PPC_DTPREL16_LO", /* name */
873 FALSE, /* partial_inplace */
874 0, /* src_mask */
875 0xffff, /* dst_mask */
876 FALSE), /* pcrel_offset */
877
878 /* Like DTPREL16_LO, but next higher group of 16 bits. */
879 HOWTO (R_PPC_DTPREL16_HI,
880 16, /* rightshift */
881 1, /* size (0 = byte, 1 = short, 2 = long) */
882 16, /* bitsize */
883 FALSE, /* pc_relative */
884 0, /* bitpos */
885 complain_overflow_dont, /* complain_on_overflow */
886 ppc_elf_unhandled_reloc, /* special_function */
887 "R_PPC_DTPREL16_HI", /* name */
888 FALSE, /* partial_inplace */
889 0, /* src_mask */
890 0xffff, /* dst_mask */
891 FALSE), /* pcrel_offset */
892
893 /* Like DTPREL16_HI, but adjust for low 16 bits. */
894 HOWTO (R_PPC_DTPREL16_HA,
895 16, /* rightshift */
896 1, /* size (0 = byte, 1 = short, 2 = long) */
897 16, /* bitsize */
898 FALSE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont, /* complain_on_overflow */
901 ppc_elf_unhandled_reloc, /* special_function */
902 "R_PPC_DTPREL16_HA", /* name */
903 FALSE, /* partial_inplace */
904 0, /* src_mask */
905 0xffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
907
908 /* Computes a tp-relative displacement, the difference between the value of
909 sym+add and the value of the thread pointer (r13). */
910 HOWTO (R_PPC_TPREL32,
911 0, /* rightshift */
912 2, /* size (0 = byte, 1 = short, 2 = long) */
913 32, /* bitsize */
914 FALSE, /* pc_relative */
915 0, /* bitpos */
916 complain_overflow_dont, /* complain_on_overflow */
917 ppc_elf_unhandled_reloc, /* special_function */
918 "R_PPC_TPREL32", /* name */
919 FALSE, /* partial_inplace */
920 0, /* src_mask */
921 0xffffffff, /* dst_mask */
922 FALSE), /* pcrel_offset */
923
924 /* A 16 bit tprel reloc. */
925 HOWTO (R_PPC_TPREL16,
926 0, /* rightshift */
927 1, /* size (0 = byte, 1 = short, 2 = long) */
928 16, /* bitsize */
929 FALSE, /* pc_relative */
930 0, /* bitpos */
931 complain_overflow_signed, /* complain_on_overflow */
932 ppc_elf_unhandled_reloc, /* special_function */
933 "R_PPC_TPREL16", /* name */
934 FALSE, /* partial_inplace */
935 0, /* src_mask */
936 0xffff, /* dst_mask */
937 FALSE), /* pcrel_offset */
938
939 /* Like TPREL16, but no overflow. */
940 HOWTO (R_PPC_TPREL16_LO,
941 0, /* rightshift */
942 1, /* size (0 = byte, 1 = short, 2 = long) */
943 16, /* bitsize */
944 FALSE, /* pc_relative */
945 0, /* bitpos */
946 complain_overflow_dont, /* complain_on_overflow */
947 ppc_elf_unhandled_reloc, /* special_function */
948 "R_PPC_TPREL16_LO", /* name */
949 FALSE, /* partial_inplace */
950 0, /* src_mask */
951 0xffff, /* dst_mask */
952 FALSE), /* pcrel_offset */
953
954 /* Like TPREL16_LO, but next higher group of 16 bits. */
955 HOWTO (R_PPC_TPREL16_HI,
956 16, /* rightshift */
957 1, /* size (0 = byte, 1 = short, 2 = long) */
958 16, /* bitsize */
959 FALSE, /* pc_relative */
960 0, /* bitpos */
961 complain_overflow_dont, /* complain_on_overflow */
962 ppc_elf_unhandled_reloc, /* special_function */
963 "R_PPC_TPREL16_HI", /* name */
964 FALSE, /* partial_inplace */
965 0, /* src_mask */
966 0xffff, /* dst_mask */
967 FALSE), /* pcrel_offset */
968
969 /* Like TPREL16_HI, but adjust for low 16 bits. */
970 HOWTO (R_PPC_TPREL16_HA,
971 16, /* rightshift */
972 1, /* size (0 = byte, 1 = short, 2 = long) */
973 16, /* bitsize */
974 FALSE, /* pc_relative */
975 0, /* bitpos */
976 complain_overflow_dont, /* complain_on_overflow */
977 ppc_elf_unhandled_reloc, /* special_function */
978 "R_PPC_TPREL16_HA", /* name */
979 FALSE, /* partial_inplace */
980 0, /* src_mask */
981 0xffff, /* dst_mask */
982 FALSE), /* pcrel_offset */
983
984 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
985 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
986 to the first entry. */
987 HOWTO (R_PPC_GOT_TLSGD16,
988 0, /* rightshift */
989 1, /* size (0 = byte, 1 = short, 2 = long) */
990 16, /* bitsize */
991 FALSE, /* pc_relative */
992 0, /* bitpos */
993 complain_overflow_signed, /* complain_on_overflow */
994 ppc_elf_unhandled_reloc, /* special_function */
995 "R_PPC_GOT_TLSGD16", /* name */
996 FALSE, /* partial_inplace */
997 0, /* src_mask */
998 0xffff, /* dst_mask */
999 FALSE), /* pcrel_offset */
1000
1001 /* Like GOT_TLSGD16, but no overflow. */
1002 HOWTO (R_PPC_GOT_TLSGD16_LO,
1003 0, /* rightshift */
1004 1, /* size (0 = byte, 1 = short, 2 = long) */
1005 16, /* bitsize */
1006 FALSE, /* pc_relative */
1007 0, /* bitpos */
1008 complain_overflow_dont, /* complain_on_overflow */
1009 ppc_elf_unhandled_reloc, /* special_function */
1010 "R_PPC_GOT_TLSGD16_LO", /* name */
1011 FALSE, /* partial_inplace */
1012 0, /* src_mask */
1013 0xffff, /* dst_mask */
1014 FALSE), /* pcrel_offset */
1015
1016 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1017 HOWTO (R_PPC_GOT_TLSGD16_HI,
1018 16, /* rightshift */
1019 1, /* size (0 = byte, 1 = short, 2 = long) */
1020 16, /* bitsize */
1021 FALSE, /* pc_relative */
1022 0, /* bitpos */
1023 complain_overflow_dont, /* complain_on_overflow */
1024 ppc_elf_unhandled_reloc, /* special_function */
1025 "R_PPC_GOT_TLSGD16_HI", /* name */
1026 FALSE, /* partial_inplace */
1027 0, /* src_mask */
1028 0xffff, /* dst_mask */
1029 FALSE), /* pcrel_offset */
1030
1031 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1032 HOWTO (R_PPC_GOT_TLSGD16_HA,
1033 16, /* rightshift */
1034 1, /* size (0 = byte, 1 = short, 2 = long) */
1035 16, /* bitsize */
1036 FALSE, /* pc_relative */
1037 0, /* bitpos */
1038 complain_overflow_dont, /* complain_on_overflow */
1039 ppc_elf_unhandled_reloc, /* special_function */
1040 "R_PPC_GOT_TLSGD16_HA", /* name */
1041 FALSE, /* partial_inplace */
1042 0, /* src_mask */
1043 0xffff, /* dst_mask */
1044 FALSE), /* pcrel_offset */
1045
1046 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1047 with values (sym+add)@dtpmod and zero, and computes the offset to the
1048 first entry. */
1049 HOWTO (R_PPC_GOT_TLSLD16,
1050 0, /* rightshift */
1051 1, /* size (0 = byte, 1 = short, 2 = long) */
1052 16, /* bitsize */
1053 FALSE, /* pc_relative */
1054 0, /* bitpos */
1055 complain_overflow_signed, /* complain_on_overflow */
1056 ppc_elf_unhandled_reloc, /* special_function */
1057 "R_PPC_GOT_TLSLD16", /* name */
1058 FALSE, /* partial_inplace */
1059 0, /* src_mask */
1060 0xffff, /* dst_mask */
1061 FALSE), /* pcrel_offset */
1062
1063 /* Like GOT_TLSLD16, but no overflow. */
1064 HOWTO (R_PPC_GOT_TLSLD16_LO,
1065 0, /* rightshift */
1066 1, /* size (0 = byte, 1 = short, 2 = long) */
1067 16, /* bitsize */
1068 FALSE, /* pc_relative */
1069 0, /* bitpos */
1070 complain_overflow_dont, /* complain_on_overflow */
1071 ppc_elf_unhandled_reloc, /* special_function */
1072 "R_PPC_GOT_TLSLD16_LO", /* name */
1073 FALSE, /* partial_inplace */
1074 0, /* src_mask */
1075 0xffff, /* dst_mask */
1076 FALSE), /* pcrel_offset */
1077
1078 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1079 HOWTO (R_PPC_GOT_TLSLD16_HI,
1080 16, /* rightshift */
1081 1, /* size (0 = byte, 1 = short, 2 = long) */
1082 16, /* bitsize */
1083 FALSE, /* pc_relative */
1084 0, /* bitpos */
1085 complain_overflow_dont, /* complain_on_overflow */
1086 ppc_elf_unhandled_reloc, /* special_function */
1087 "R_PPC_GOT_TLSLD16_HI", /* name */
1088 FALSE, /* partial_inplace */
1089 0, /* src_mask */
1090 0xffff, /* dst_mask */
1091 FALSE), /* pcrel_offset */
1092
1093 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1094 HOWTO (R_PPC_GOT_TLSLD16_HA,
1095 16, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_dont, /* complain_on_overflow */
1101 ppc_elf_unhandled_reloc, /* special_function */
1102 "R_PPC_GOT_TLSLD16_HA", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1109 the offset to the entry. */
1110 HOWTO (R_PPC_GOT_DTPREL16,
1111 0, /* rightshift */
1112 1, /* size (0 = byte, 1 = short, 2 = long) */
1113 16, /* bitsize */
1114 FALSE, /* pc_relative */
1115 0, /* bitpos */
1116 complain_overflow_signed, /* complain_on_overflow */
1117 ppc_elf_unhandled_reloc, /* special_function */
1118 "R_PPC_GOT_DTPREL16", /* name */
1119 FALSE, /* partial_inplace */
1120 0, /* src_mask */
1121 0xffff, /* dst_mask */
1122 FALSE), /* pcrel_offset */
1123
1124 /* Like GOT_DTPREL16, but no overflow. */
1125 HOWTO (R_PPC_GOT_DTPREL16_LO,
1126 0, /* rightshift */
1127 1, /* size (0 = byte, 1 = short, 2 = long) */
1128 16, /* bitsize */
1129 FALSE, /* pc_relative */
1130 0, /* bitpos */
1131 complain_overflow_dont, /* complain_on_overflow */
1132 ppc_elf_unhandled_reloc, /* special_function */
1133 "R_PPC_GOT_DTPREL16_LO", /* name */
1134 FALSE, /* partial_inplace */
1135 0, /* src_mask */
1136 0xffff, /* dst_mask */
1137 FALSE), /* pcrel_offset */
1138
1139 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1140 HOWTO (R_PPC_GOT_DTPREL16_HI,
1141 16, /* rightshift */
1142 1, /* size (0 = byte, 1 = short, 2 = long) */
1143 16, /* bitsize */
1144 FALSE, /* pc_relative */
1145 0, /* bitpos */
1146 complain_overflow_dont, /* complain_on_overflow */
1147 ppc_elf_unhandled_reloc, /* special_function */
1148 "R_PPC_GOT_DTPREL16_HI", /* name */
1149 FALSE, /* partial_inplace */
1150 0, /* src_mask */
1151 0xffff, /* dst_mask */
1152 FALSE), /* pcrel_offset */
1153
1154 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1155 HOWTO (R_PPC_GOT_DTPREL16_HA,
1156 16, /* rightshift */
1157 1, /* size (0 = byte, 1 = short, 2 = long) */
1158 16, /* bitsize */
1159 FALSE, /* pc_relative */
1160 0, /* bitpos */
1161 complain_overflow_dont, /* complain_on_overflow */
1162 ppc_elf_unhandled_reloc, /* special_function */
1163 "R_PPC_GOT_DTPREL16_HA", /* name */
1164 FALSE, /* partial_inplace */
1165 0, /* src_mask */
1166 0xffff, /* dst_mask */
1167 FALSE), /* pcrel_offset */
1168
1169 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1170 offset to the entry. */
1171 HOWTO (R_PPC_GOT_TPREL16,
1172 0, /* rightshift */
1173 1, /* size (0 = byte, 1 = short, 2 = long) */
1174 16, /* bitsize */
1175 FALSE, /* pc_relative */
1176 0, /* bitpos */
1177 complain_overflow_signed, /* complain_on_overflow */
1178 ppc_elf_unhandled_reloc, /* special_function */
1179 "R_PPC_GOT_TPREL16", /* name */
1180 FALSE, /* partial_inplace */
1181 0, /* src_mask */
1182 0xffff, /* dst_mask */
1183 FALSE), /* pcrel_offset */
1184
1185 /* Like GOT_TPREL16, but no overflow. */
1186 HOWTO (R_PPC_GOT_TPREL16_LO,
1187 0, /* rightshift */
1188 1, /* size (0 = byte, 1 = short, 2 = long) */
1189 16, /* bitsize */
1190 FALSE, /* pc_relative */
1191 0, /* bitpos */
1192 complain_overflow_dont, /* complain_on_overflow */
1193 ppc_elf_unhandled_reloc, /* special_function */
1194 "R_PPC_GOT_TPREL16_LO", /* name */
1195 FALSE, /* partial_inplace */
1196 0, /* src_mask */
1197 0xffff, /* dst_mask */
1198 FALSE), /* pcrel_offset */
1199
1200 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1201 HOWTO (R_PPC_GOT_TPREL16_HI,
1202 16, /* rightshift */
1203 1, /* size (0 = byte, 1 = short, 2 = long) */
1204 16, /* bitsize */
1205 FALSE, /* pc_relative */
1206 0, /* bitpos */
1207 complain_overflow_dont, /* complain_on_overflow */
1208 ppc_elf_unhandled_reloc, /* special_function */
1209 "R_PPC_GOT_TPREL16_HI", /* name */
1210 FALSE, /* partial_inplace */
1211 0, /* src_mask */
1212 0xffff, /* dst_mask */
1213 FALSE), /* pcrel_offset */
1214
1215 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1216 HOWTO (R_PPC_GOT_TPREL16_HA,
1217 16, /* rightshift */
1218 1, /* size (0 = byte, 1 = short, 2 = long) */
1219 16, /* bitsize */
1220 FALSE, /* pc_relative */
1221 0, /* bitpos */
1222 complain_overflow_dont, /* complain_on_overflow */
1223 ppc_elf_unhandled_reloc, /* special_function */
1224 "R_PPC_GOT_TPREL16_HA", /* name */
1225 FALSE, /* partial_inplace */
1226 0, /* src_mask */
1227 0xffff, /* dst_mask */
1228 FALSE), /* pcrel_offset */
1229
1230 /* The remaining relocs are from the Embedded ELF ABI, and are not
1231 in the SVR4 ELF ABI. */
1232
1233 /* 32 bit value resulting from the addend minus the symbol. */
1234 HOWTO (R_PPC_EMB_NADDR32, /* type */
1235 0, /* rightshift */
1236 2, /* size (0 = byte, 1 = short, 2 = long) */
1237 32, /* bitsize */
1238 FALSE, /* pc_relative */
1239 0, /* bitpos */
1240 complain_overflow_dont, /* complain_on_overflow */
1241 ppc_elf_unhandled_reloc, /* special_function */
1242 "R_PPC_EMB_NADDR32", /* name */
1243 FALSE, /* partial_inplace */
1244 0, /* src_mask */
1245 0xffffffff, /* dst_mask */
1246 FALSE), /* pcrel_offset */
1247
1248 /* 16 bit value resulting from the addend minus the symbol. */
1249 HOWTO (R_PPC_EMB_NADDR16, /* type */
1250 0, /* rightshift */
1251 1, /* size (0 = byte, 1 = short, 2 = long) */
1252 16, /* bitsize */
1253 FALSE, /* pc_relative */
1254 0, /* bitpos */
1255 complain_overflow_signed, /* complain_on_overflow */
1256 ppc_elf_unhandled_reloc, /* special_function */
1257 "R_PPC_EMB_NADDR16", /* name */
1258 FALSE, /* partial_inplace */
1259 0, /* src_mask */
1260 0xffff, /* dst_mask */
1261 FALSE), /* pcrel_offset */
1262
1263 /* 16 bit value resulting from the addend minus the symbol. */
1264 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1265 0, /* rightshift */
1266 1, /* size (0 = byte, 1 = short, 2 = long) */
1267 16, /* bitsize */
1268 FALSE, /* pc_relative */
1269 0, /* bitpos */
1270 complain_overflow_dont,/* complain_on_overflow */
1271 ppc_elf_unhandled_reloc, /* special_function */
1272 "R_PPC_EMB_ADDR16_LO", /* name */
1273 FALSE, /* partial_inplace */
1274 0, /* src_mask */
1275 0xffff, /* dst_mask */
1276 FALSE), /* pcrel_offset */
1277
1278 /* The high order 16 bits of the addend minus the symbol. */
1279 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1280 16, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_dont, /* complain_on_overflow */
1286 ppc_elf_unhandled_reloc, /* special_function */
1287 "R_PPC_EMB_NADDR16_HI", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xffff, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* The high order 16 bits of the result of the addend minus the address,
1294 plus 1 if the contents of the low 16 bits, treated as a signed number,
1295 is negative. */
1296 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1297 16, /* rightshift */
1298 1, /* size (0 = byte, 1 = short, 2 = long) */
1299 16, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_dont, /* complain_on_overflow */
1303 ppc_elf_unhandled_reloc, /* special_function */
1304 "R_PPC_EMB_NADDR16_HA", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0xffff, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 /* 16 bit value resulting from allocating a 4 byte word to hold an
1311 address in the .sdata section, and returning the offset from
1312 _SDA_BASE_ for that relocation. */
1313 HOWTO (R_PPC_EMB_SDAI16, /* type */
1314 0, /* rightshift */
1315 1, /* size (0 = byte, 1 = short, 2 = long) */
1316 16, /* bitsize */
1317 FALSE, /* pc_relative */
1318 0, /* bitpos */
1319 complain_overflow_signed, /* complain_on_overflow */
1320 ppc_elf_unhandled_reloc, /* special_function */
1321 "R_PPC_EMB_SDAI16", /* name */
1322 FALSE, /* partial_inplace */
1323 0, /* src_mask */
1324 0xffff, /* dst_mask */
1325 FALSE), /* pcrel_offset */
1326
1327 /* 16 bit value resulting from allocating a 4 byte word to hold an
1328 address in the .sdata2 section, and returning the offset from
1329 _SDA2_BASE_ for that relocation. */
1330 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1331 0, /* rightshift */
1332 1, /* size (0 = byte, 1 = short, 2 = long) */
1333 16, /* bitsize */
1334 FALSE, /* pc_relative */
1335 0, /* bitpos */
1336 complain_overflow_signed, /* complain_on_overflow */
1337 ppc_elf_unhandled_reloc, /* special_function */
1338 "R_PPC_EMB_SDA2I16", /* name */
1339 FALSE, /* partial_inplace */
1340 0, /* src_mask */
1341 0xffff, /* dst_mask */
1342 FALSE), /* pcrel_offset */
1343
1344 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1345 small data items. */
1346 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1347 0, /* rightshift */
1348 1, /* size (0 = byte, 1 = short, 2 = long) */
1349 16, /* bitsize */
1350 FALSE, /* pc_relative */
1351 0, /* bitpos */
1352 complain_overflow_signed, /* complain_on_overflow */
1353 ppc_elf_unhandled_reloc, /* special_function */
1354 "R_PPC_EMB_SDA2REL", /* name */
1355 FALSE, /* partial_inplace */
1356 0, /* src_mask */
1357 0xffff, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1359
1360 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1361 signed offset from the appropriate base, and filling in the register
1362 field with the appropriate register (0, 2, or 13). */
1363 HOWTO (R_PPC_EMB_SDA21, /* type */
1364 0, /* rightshift */
1365 2, /* size (0 = byte, 1 = short, 2 = long) */
1366 16, /* bitsize */
1367 FALSE, /* pc_relative */
1368 0, /* bitpos */
1369 complain_overflow_signed, /* complain_on_overflow */
1370 ppc_elf_unhandled_reloc, /* special_function */
1371 "R_PPC_EMB_SDA21", /* name */
1372 FALSE, /* partial_inplace */
1373 0, /* src_mask */
1374 0xffff, /* dst_mask */
1375 FALSE), /* pcrel_offset */
1376
1377 /* Relocation not handled: R_PPC_EMB_MRKREF */
1378 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1379 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1380 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1382 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1383
1384 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1385 in the 16 bit signed offset from the appropriate base, and filling in the
1386 register field with the appropriate register (0, 2, or 13). */
1387 HOWTO (R_PPC_EMB_RELSDA, /* type */
1388 0, /* rightshift */
1389 1, /* size (0 = byte, 1 = short, 2 = long) */
1390 16, /* bitsize */
1391 FALSE, /* pc_relative */
1392 0, /* bitpos */
1393 complain_overflow_signed, /* complain_on_overflow */
1394 ppc_elf_unhandled_reloc, /* special_function */
1395 "R_PPC_EMB_RELSDA", /* name */
1396 FALSE, /* partial_inplace */
1397 0, /* src_mask */
1398 0xffff, /* dst_mask */
1399 FALSE), /* pcrel_offset */
1400
1401 /* A relative 8 bit branch. */
1402 HOWTO (R_PPC_VLE_REL8, /* type */
1403 1, /* rightshift */
1404 1, /* size (0 = byte, 1 = short, 2 = long) */
1405 8, /* bitsize */
1406 TRUE, /* pc_relative */
1407 0, /* bitpos */
1408 complain_overflow_signed, /* complain_on_overflow */
1409 bfd_elf_generic_reloc, /* special_function */
1410 "R_PPC_VLE_REL8", /* name */
1411 FALSE, /* partial_inplace */
1412 0, /* src_mask */
1413 0xff, /* dst_mask */
1414 TRUE), /* pcrel_offset */
1415
1416 /* A relative 15 bit branch. */
1417 HOWTO (R_PPC_VLE_REL15, /* type */
1418 1, /* rightshift */
1419 2, /* size (0 = byte, 1 = short, 2 = long) */
1420 15, /* bitsize */
1421 TRUE, /* pc_relative */
1422 1, /* bitpos */
1423 complain_overflow_signed, /* complain_on_overflow */
1424 bfd_elf_generic_reloc, /* special_function */
1425 "R_PPC_VLE_REL15", /* name */
1426 FALSE, /* partial_inplace */
1427 0, /* src_mask */
1428 0xfffe, /* dst_mask */
1429 TRUE), /* pcrel_offset */
1430
1431 /* A relative 24 bit branch. */
1432 HOWTO (R_PPC_VLE_REL24, /* type */
1433 1, /* rightshift */
1434 2, /* size (0 = byte, 1 = short, 2 = long) */
1435 24, /* bitsize */
1436 TRUE, /* pc_relative */
1437 1, /* bitpos */
1438 complain_overflow_signed, /* complain_on_overflow */
1439 bfd_elf_generic_reloc, /* special_function */
1440 "R_PPC_VLE_REL24", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 0x1fffffe, /* dst_mask */
1444 TRUE), /* pcrel_offset */
1445
1446 /* The 16 LSBS in split16a format. */
1447 HOWTO (R_PPC_VLE_LO16A, /* type */
1448 0, /* rightshift */
1449 2, /* size (0 = byte, 1 = short, 2 = long) */
1450 16, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_dont, /* complain_on_overflow */
1454 ppc_elf_unhandled_reloc, /* special_function */
1455 "R_PPC_VLE_LO16A", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0x1f007ff, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 /* The 16 LSBS in split16d format. */
1462 HOWTO (R_PPC_VLE_LO16D, /* type */
1463 0, /* rightshift */
1464 2, /* size (0 = byte, 1 = short, 2 = long) */
1465 16, /* bitsize */
1466 FALSE, /* pc_relative */
1467 0, /* bitpos */
1468 complain_overflow_dont, /* complain_on_overflow */
1469 ppc_elf_unhandled_reloc, /* special_function */
1470 "R_PPC_VLE_LO16D", /* name */
1471 FALSE, /* partial_inplace */
1472 0, /* src_mask */
1473 0x1f07ff, /* dst_mask */
1474 FALSE), /* pcrel_offset */
1475
1476 /* Bits 16-31 split16a format. */
1477 HOWTO (R_PPC_VLE_HI16A, /* type */
1478 16, /* rightshift */
1479 2, /* size (0 = byte, 1 = short, 2 = long) */
1480 16, /* bitsize */
1481 FALSE, /* pc_relative */
1482 0, /* bitpos */
1483 complain_overflow_dont, /* complain_on_overflow */
1484 ppc_elf_unhandled_reloc, /* special_function */
1485 "R_PPC_VLE_HI16A", /* name */
1486 FALSE, /* partial_inplace */
1487 0, /* src_mask */
1488 0x1f007ff, /* dst_mask */
1489 FALSE), /* pcrel_offset */
1490
1491 /* Bits 16-31 split16d format. */
1492 HOWTO (R_PPC_VLE_HI16D, /* type */
1493 16, /* rightshift */
1494 2, /* size (0 = byte, 1 = short, 2 = long) */
1495 16, /* bitsize */
1496 FALSE, /* pc_relative */
1497 0, /* bitpos */
1498 complain_overflow_dont, /* complain_on_overflow */
1499 ppc_elf_unhandled_reloc, /* special_function */
1500 "R_PPC_VLE_HI16D", /* name */
1501 FALSE, /* partial_inplace */
1502 0, /* src_mask */
1503 0x1f07ff, /* dst_mask */
1504 FALSE), /* pcrel_offset */
1505
1506 /* Bits 16-31 (High Adjusted) in split16a format. */
1507 HOWTO (R_PPC_VLE_HA16A, /* type */
1508 16, /* rightshift */
1509 2, /* size (0 = byte, 1 = short, 2 = long) */
1510 16, /* bitsize */
1511 FALSE, /* pc_relative */
1512 0, /* bitpos */
1513 complain_overflow_dont, /* complain_on_overflow */
1514 ppc_elf_unhandled_reloc, /* special_function */
1515 "R_PPC_VLE_HA16A", /* name */
1516 FALSE, /* partial_inplace */
1517 0, /* src_mask */
1518 0x1f007ff, /* dst_mask */
1519 FALSE), /* pcrel_offset */
1520
1521 /* Bits 16-31 (High Adjusted) in split16d format. */
1522 HOWTO (R_PPC_VLE_HA16D, /* type */
1523 16, /* rightshift */
1524 2, /* size (0 = byte, 1 = short, 2 = long) */
1525 16, /* bitsize */
1526 FALSE, /* pc_relative */
1527 0, /* bitpos */
1528 complain_overflow_dont, /* complain_on_overflow */
1529 ppc_elf_unhandled_reloc, /* special_function */
1530 "R_PPC_VLE_HA16D", /* name */
1531 FALSE, /* partial_inplace */
1532 0, /* src_mask */
1533 0x1f07ff, /* dst_mask */
1534 FALSE), /* pcrel_offset */
1535
1536 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1537 instructions. If the register base is 0 then the linker changes
1538 the e_add16i to an e_li instruction. */
1539 HOWTO (R_PPC_VLE_SDA21, /* type */
1540 0, /* rightshift */
1541 2, /* size (0 = byte, 1 = short, 2 = long) */
1542 16, /* bitsize */
1543 FALSE, /* pc_relative */
1544 0, /* bitpos */
1545 complain_overflow_signed, /* complain_on_overflow */
1546 ppc_elf_unhandled_reloc, /* special_function */
1547 "R_PPC_VLE_SDA21", /* name */
1548 FALSE, /* partial_inplace */
1549 0, /* src_mask */
1550 0xffff, /* dst_mask */
1551 FALSE), /* pcrel_offset */
1552
1553 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1554 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1555 0, /* rightshift */
1556 2, /* size (0 = byte, 1 = short, 2 = long) */
1557 16, /* bitsize */
1558 FALSE, /* pc_relative */
1559 0, /* bitpos */
1560 complain_overflow_dont, /* complain_on_overflow */
1561 ppc_elf_unhandled_reloc, /* special_function */
1562 "R_PPC_VLE_SDA21_LO", /* name */
1563 FALSE, /* partial_inplace */
1564 0, /* src_mask */
1565 0xffff, /* dst_mask */
1566 FALSE), /* pcrel_offset */
1567
1568 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1569 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1570 0, /* rightshift */
1571 2, /* size (0 = byte, 1 = short, 2 = long) */
1572 16, /* bitsize */
1573 FALSE, /* pc_relative */
1574 0, /* bitpos */
1575 complain_overflow_dont, /* complain_on_overflow */
1576 ppc_elf_unhandled_reloc, /* special_function */
1577 "R_PPC_VLE_SDAREL_LO16A", /* name */
1578 FALSE, /* partial_inplace */
1579 0, /* src_mask */
1580 0x1f007ff, /* dst_mask */
1581 FALSE), /* pcrel_offset */
1582
1583 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1584 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1585 0, /* rightshift */
1586 2, /* size (0 = byte, 1 = short, 2 = long) */
1587 16, /* bitsize */
1588 FALSE, /* pc_relative */
1589 0, /* bitpos */
1590 complain_overflow_dont, /* complain_on_overflow */
1591 ppc_elf_unhandled_reloc, /* special_function */
1592 "R_PPC_VLE_SDAREL_LO16D", /* name */
1593 FALSE, /* partial_inplace */
1594 0, /* src_mask */
1595 0x1f07ff, /* dst_mask */
1596 FALSE), /* pcrel_offset */
1597
1598 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1599 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1600 16, /* rightshift */
1601 2, /* size (0 = byte, 1 = short, 2 = long) */
1602 16, /* bitsize */
1603 FALSE, /* pc_relative */
1604 0, /* bitpos */
1605 complain_overflow_dont, /* complain_on_overflow */
1606 ppc_elf_unhandled_reloc, /* special_function */
1607 "R_PPC_VLE_SDAREL_HI16A", /* name */
1608 FALSE, /* partial_inplace */
1609 0, /* src_mask */
1610 0x1f007ff, /* dst_mask */
1611 FALSE), /* pcrel_offset */
1612
1613 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1614 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1615 16, /* rightshift */
1616 2, /* size (0 = byte, 1 = short, 2 = long) */
1617 16, /* bitsize */
1618 FALSE, /* pc_relative */
1619 0, /* bitpos */
1620 complain_overflow_dont, /* complain_on_overflow */
1621 ppc_elf_unhandled_reloc, /* special_function */
1622 "R_PPC_VLE_SDAREL_HI16D", /* name */
1623 FALSE, /* partial_inplace */
1624 0, /* src_mask */
1625 0x1f07ff, /* dst_mask */
1626 FALSE), /* pcrel_offset */
1627
1628 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1629 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1630 16, /* rightshift */
1631 2, /* size (0 = byte, 1 = short, 2 = long) */
1632 16, /* bitsize */
1633 FALSE, /* pc_relative */
1634 0, /* bitpos */
1635 complain_overflow_dont, /* complain_on_overflow */
1636 ppc_elf_unhandled_reloc, /* special_function */
1637 "R_PPC_VLE_SDAREL_HA16A", /* name */
1638 FALSE, /* partial_inplace */
1639 0, /* src_mask */
1640 0x1f007ff, /* dst_mask */
1641 FALSE), /* pcrel_offset */
1642
1643 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1644 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1645 16, /* rightshift */
1646 2, /* size (0 = byte, 1 = short, 2 = long) */
1647 16, /* bitsize */
1648 FALSE, /* pc_relative */
1649 0, /* bitpos */
1650 complain_overflow_dont, /* complain_on_overflow */
1651 ppc_elf_unhandled_reloc, /* special_function */
1652 "R_PPC_VLE_SDAREL_HA16D", /* name */
1653 FALSE, /* partial_inplace */
1654 0, /* src_mask */
1655 0x1f07ff, /* dst_mask */
1656 FALSE), /* pcrel_offset */
1657
1658 HOWTO (R_PPC_IRELATIVE, /* type */
1659 0, /* rightshift */
1660 2, /* size (0 = byte, 1 = short, 2 = long) */
1661 32, /* bitsize */
1662 FALSE, /* pc_relative */
1663 0, /* bitpos */
1664 complain_overflow_dont, /* complain_on_overflow */
1665 ppc_elf_unhandled_reloc, /* special_function */
1666 "R_PPC_IRELATIVE", /* name */
1667 FALSE, /* partial_inplace */
1668 0, /* src_mask */
1669 0xffffffff, /* dst_mask */
1670 FALSE), /* pcrel_offset */
1671
1672 /* A 16 bit relative relocation. */
1673 HOWTO (R_PPC_REL16, /* type */
1674 0, /* rightshift */
1675 1, /* size (0 = byte, 1 = short, 2 = long) */
1676 16, /* bitsize */
1677 TRUE, /* pc_relative */
1678 0, /* bitpos */
1679 complain_overflow_signed, /* complain_on_overflow */
1680 bfd_elf_generic_reloc, /* special_function */
1681 "R_PPC_REL16", /* name */
1682 FALSE, /* partial_inplace */
1683 0, /* src_mask */
1684 0xffff, /* dst_mask */
1685 TRUE), /* pcrel_offset */
1686
1687 /* A 16 bit relative relocation without overflow. */
1688 HOWTO (R_PPC_REL16_LO, /* type */
1689 0, /* rightshift */
1690 1, /* size (0 = byte, 1 = short, 2 = long) */
1691 16, /* bitsize */
1692 TRUE, /* pc_relative */
1693 0, /* bitpos */
1694 complain_overflow_dont,/* complain_on_overflow */
1695 bfd_elf_generic_reloc, /* special_function */
1696 "R_PPC_REL16_LO", /* name */
1697 FALSE, /* partial_inplace */
1698 0, /* src_mask */
1699 0xffff, /* dst_mask */
1700 TRUE), /* pcrel_offset */
1701
1702 /* The high order 16 bits of a relative address. */
1703 HOWTO (R_PPC_REL16_HI, /* type */
1704 16, /* rightshift */
1705 1, /* size (0 = byte, 1 = short, 2 = long) */
1706 16, /* bitsize */
1707 TRUE, /* pc_relative */
1708 0, /* bitpos */
1709 complain_overflow_dont, /* complain_on_overflow */
1710 bfd_elf_generic_reloc, /* special_function */
1711 "R_PPC_REL16_HI", /* name */
1712 FALSE, /* partial_inplace */
1713 0, /* src_mask */
1714 0xffff, /* dst_mask */
1715 TRUE), /* pcrel_offset */
1716
1717 /* The high order 16 bits of a relative address, plus 1 if the contents of
1718 the low 16 bits, treated as a signed number, is negative. */
1719 HOWTO (R_PPC_REL16_HA, /* type */
1720 16, /* rightshift */
1721 1, /* size (0 = byte, 1 = short, 2 = long) */
1722 16, /* bitsize */
1723 TRUE, /* pc_relative */
1724 0, /* bitpos */
1725 complain_overflow_dont, /* complain_on_overflow */
1726 ppc_elf_addr16_ha_reloc, /* special_function */
1727 "R_PPC_REL16_HA", /* name */
1728 FALSE, /* partial_inplace */
1729 0, /* src_mask */
1730 0xffff, /* dst_mask */
1731 TRUE), /* pcrel_offset */
1732
1733 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1734 HOWTO (R_PPC_REL16DX_HA, /* type */
1735 16, /* rightshift */
1736 2, /* size (0 = byte, 1 = short, 2 = long) */
1737 16, /* bitsize */
1738 TRUE, /* pc_relative */
1739 0, /* bitpos */
1740 complain_overflow_signed, /* complain_on_overflow */
1741 ppc_elf_addr16_ha_reloc, /* special_function */
1742 "R_PPC_REL16DX_HA", /* name */
1743 FALSE, /* partial_inplace */
1744 0, /* src_mask */
1745 0x1fffc1, /* dst_mask */
1746 TRUE), /* pcrel_offset */
1747
1748 /* GNU extension to record C++ vtable hierarchy. */
1749 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1750 0, /* rightshift */
1751 0, /* size (0 = byte, 1 = short, 2 = long) */
1752 0, /* bitsize */
1753 FALSE, /* pc_relative */
1754 0, /* bitpos */
1755 complain_overflow_dont, /* complain_on_overflow */
1756 NULL, /* special_function */
1757 "R_PPC_GNU_VTINHERIT", /* name */
1758 FALSE, /* partial_inplace */
1759 0, /* src_mask */
1760 0, /* dst_mask */
1761 FALSE), /* pcrel_offset */
1762
1763 /* GNU extension to record C++ vtable member usage. */
1764 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1765 0, /* rightshift */
1766 0, /* size (0 = byte, 1 = short, 2 = long) */
1767 0, /* bitsize */
1768 FALSE, /* pc_relative */
1769 0, /* bitpos */
1770 complain_overflow_dont, /* complain_on_overflow */
1771 NULL, /* special_function */
1772 "R_PPC_GNU_VTENTRY", /* name */
1773 FALSE, /* partial_inplace */
1774 0, /* src_mask */
1775 0, /* dst_mask */
1776 FALSE), /* pcrel_offset */
1777
1778 /* Phony reloc to handle AIX style TOC entries. */
1779 HOWTO (R_PPC_TOC16, /* type */
1780 0, /* rightshift */
1781 1, /* size (0 = byte, 1 = short, 2 = long) */
1782 16, /* bitsize */
1783 FALSE, /* pc_relative */
1784 0, /* bitpos */
1785 complain_overflow_signed, /* complain_on_overflow */
1786 ppc_elf_unhandled_reloc, /* special_function */
1787 "R_PPC_TOC16", /* name */
1788 FALSE, /* partial_inplace */
1789 0, /* src_mask */
1790 0xffff, /* dst_mask */
1791 FALSE), /* pcrel_offset */
1792 };
1793
1794 /* External 32-bit PPC structure for PRPSINFO. This structure is
1795 ABI-defined, thus we choose to use char arrays here in order to
1796 avoid dealing with different types in different architectures.
1797
1798 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1799 most non-PPC architectures use `short int'.
1800
1801 This structure will ultimately be written in the corefile's note
1802 section, as the PRPSINFO. */
1803
1804 struct elf_external_ppc_linux_prpsinfo32
1805 {
1806 char pr_state; /* Numeric process state. */
1807 char pr_sname; /* Char for pr_state. */
1808 char pr_zomb; /* Zombie. */
1809 char pr_nice; /* Nice val. */
1810 char pr_flag[4]; /* Flags. */
1811 char pr_uid[4];
1812 char pr_gid[4];
1813 char pr_pid[4];
1814 char pr_ppid[4];
1815 char pr_pgrp[4];
1816 char pr_sid[4];
1817 char pr_fname[16]; /* Filename of executable. */
1818 char pr_psargs[80]; /* Initial part of arg list. */
1819 };
1820
1821 /* Helper function to copy an elf_internal_linux_prpsinfo in host
1822 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */
1823
1824 static inline void
1825 swap_ppc_linux_prpsinfo32_out (bfd *obfd,
1826 const struct elf_internal_linux_prpsinfo *from,
1827 struct elf_external_ppc_linux_prpsinfo32 *to)
1828 {
1829 bfd_put_8 (obfd, from->pr_state, &to->pr_state);
1830 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname);
1831 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb);
1832 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice);
1833 bfd_put_32 (obfd, from->pr_flag, to->pr_flag);
1834 bfd_put_32 (obfd, from->pr_uid, to->pr_uid);
1835 bfd_put_32 (obfd, from->pr_gid, to->pr_gid);
1836 bfd_put_32 (obfd, from->pr_pid, to->pr_pid);
1837 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid);
1838 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp);
1839 bfd_put_32 (obfd, from->pr_sid, to->pr_sid);
1840 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname));
1841 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs));
1842 }
1843 \f
1844 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1845
1846 static void
1847 ppc_elf_howto_init (void)
1848 {
1849 unsigned int i, type;
1850
1851 for (i = 0;
1852 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1853 i++)
1854 {
1855 type = ppc_elf_howto_raw[i].type;
1856 if (type >= (sizeof (ppc_elf_howto_table)
1857 / sizeof (ppc_elf_howto_table[0])))
1858 abort ();
1859 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1860 }
1861 }
1862
1863 static reloc_howto_type *
1864 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1865 bfd_reloc_code_real_type code)
1866 {
1867 enum elf_ppc_reloc_type r;
1868
1869 /* Initialize howto table if not already done. */
1870 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1871 ppc_elf_howto_init ();
1872
1873 switch (code)
1874 {
1875 default:
1876 return NULL;
1877
1878 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1879 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1880 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1881 case BFD_RELOC_PPC64_ADDR16_DS:
1882 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1883 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1884 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1885 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1886 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1887 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1888 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1889 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1890 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1891 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1892 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1893 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1894 case BFD_RELOC_PPC64_GOT16_DS:
1895 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1896 case BFD_RELOC_PPC64_GOT16_LO_DS:
1897 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1898 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1899 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1900 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1901 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1902 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1903 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1904 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1905 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1906 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1907 case BFD_RELOC_PPC64_PLT16_LO_DS:
1908 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1909 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1910 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1911 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1912 case BFD_RELOC_PPC64_SECTOFF_DS:
1913 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1914 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1915 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1916 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1917 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1918 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1919 case BFD_RELOC_PPC64_TOC16_DS:
1920 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1921 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1922 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1923 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1924 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1925 case BFD_RELOC_PPC64_TPREL16_DS:
1926 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1927 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1928 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1929 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1930 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1931 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1932 case BFD_RELOC_PPC64_DTPREL16_DS:
1933 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1934 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1935 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1936 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1937 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1938 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1939 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1940 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1941 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1942 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1943 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1944 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1945 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1946 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1947 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1948 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1949 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1950 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1951 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1952 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1953 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1954 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1955 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1956 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1957 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1958 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1959 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1960 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1961 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1962 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1963 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1964 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1965 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1966 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1967 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1968 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1969 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1970 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1971 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1972 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1973 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1974 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1975 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1976 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1977 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1978 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1979 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1980 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1981 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1982 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1983 r = R_PPC_VLE_SDAREL_LO16A;
1984 break;
1985 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1986 r = R_PPC_VLE_SDAREL_LO16D;
1987 break;
1988 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1989 r = R_PPC_VLE_SDAREL_HI16A;
1990 break;
1991 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1992 r = R_PPC_VLE_SDAREL_HI16D;
1993 break;
1994 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1995 r = R_PPC_VLE_SDAREL_HA16A;
1996 break;
1997 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1998 r = R_PPC_VLE_SDAREL_HA16D;
1999 break;
2000 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2001 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2002 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2003 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2004 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2005 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2006 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2007 }
2008
2009 return ppc_elf_howto_table[r];
2010 };
2011
2012 static reloc_howto_type *
2013 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2014 const char *r_name)
2015 {
2016 unsigned int i;
2017
2018 for (i = 0;
2019 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2020 i++)
2021 if (ppc_elf_howto_raw[i].name != NULL
2022 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2023 return &ppc_elf_howto_raw[i];
2024
2025 return NULL;
2026 }
2027
2028 /* Set the howto pointer for a PowerPC ELF reloc. */
2029
2030 static void
2031 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2032 arelent *cache_ptr,
2033 Elf_Internal_Rela *dst)
2034 {
2035 unsigned int r_type;
2036
2037 /* Initialize howto table if not already done. */
2038 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2039 ppc_elf_howto_init ();
2040
2041 r_type = ELF32_R_TYPE (dst->r_info);
2042 if (r_type >= R_PPC_max)
2043 {
2044 /* xgettext:c-format */
2045 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2046 abfd, r_type);
2047 bfd_set_error (bfd_error_bad_value);
2048 r_type = R_PPC_NONE;
2049 }
2050 cache_ptr->howto = ppc_elf_howto_table[r_type];
2051
2052 /* Just because the above assert didn't trigger doesn't mean that
2053 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2054 if (!cache_ptr->howto)
2055 {
2056 /* xgettext:c-format */
2057 _bfd_error_handler (_("%B: invalid relocation type %d"),
2058 abfd, r_type);
2059 bfd_set_error (bfd_error_bad_value);
2060
2061 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2062 }
2063 }
2064
2065 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2066
2067 static bfd_reloc_status_type
2068 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2069 arelent *reloc_entry,
2070 asymbol *symbol,
2071 void *data ATTRIBUTE_UNUSED,
2072 asection *input_section,
2073 bfd *output_bfd,
2074 char **error_message ATTRIBUTE_UNUSED)
2075 {
2076 enum elf_ppc_reloc_type r_type;
2077 long insn;
2078 bfd_size_type octets;
2079 bfd_vma value;
2080
2081 if (output_bfd != NULL)
2082 {
2083 reloc_entry->address += input_section->output_offset;
2084 return bfd_reloc_ok;
2085 }
2086
2087 reloc_entry->addend += 0x8000;
2088 r_type = reloc_entry->howto->type;
2089 if (r_type != R_PPC_REL16DX_HA)
2090 return bfd_reloc_continue;
2091
2092 value = 0;
2093 if (!bfd_is_com_section (symbol->section))
2094 value = symbol->value;
2095 value += (reloc_entry->addend
2096 + symbol->section->output_offset
2097 + symbol->section->output_section->vma);
2098 value -= (reloc_entry->address
2099 + input_section->output_offset
2100 + input_section->output_section->vma);
2101 value >>= 16;
2102
2103 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2104 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2105 insn &= ~0x1fffc1;
2106 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2107 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2108 return bfd_reloc_ok;
2109 }
2110
2111 static bfd_reloc_status_type
2112 ppc_elf_unhandled_reloc (bfd *abfd,
2113 arelent *reloc_entry,
2114 asymbol *symbol,
2115 void *data,
2116 asection *input_section,
2117 bfd *output_bfd,
2118 char **error_message)
2119 {
2120 /* If this is a relocatable link (output_bfd test tells us), just
2121 call the generic function. Any adjustment will be done at final
2122 link time. */
2123 if (output_bfd != NULL)
2124 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2125 input_section, output_bfd, error_message);
2126
2127 if (error_message != NULL)
2128 {
2129 static char buf[60];
2130 sprintf (buf, _("generic linker can't handle %s"),
2131 reloc_entry->howto->name);
2132 *error_message = buf;
2133 }
2134 return bfd_reloc_dangerous;
2135 }
2136 \f
2137 /* Sections created by the linker. */
2138
2139 typedef struct elf_linker_section
2140 {
2141 /* Pointer to the bfd section. */
2142 asection *section;
2143 /* Section name. */
2144 const char *name;
2145 /* Associated bss section name. */
2146 const char *bss_name;
2147 /* Associated symbol name. */
2148 const char *sym_name;
2149 /* Associated symbol. */
2150 struct elf_link_hash_entry *sym;
2151 } elf_linker_section_t;
2152
2153 /* Linked list of allocated pointer entries. This hangs off of the
2154 symbol lists, and provides allows us to return different pointers,
2155 based on different addend's. */
2156
2157 typedef struct elf_linker_section_pointers
2158 {
2159 /* next allocated pointer for this symbol */
2160 struct elf_linker_section_pointers *next;
2161 /* offset of pointer from beginning of section */
2162 bfd_vma offset;
2163 /* addend used */
2164 bfd_vma addend;
2165 /* which linker section this is */
2166 elf_linker_section_t *lsect;
2167 } elf_linker_section_pointers_t;
2168
2169 struct ppc_elf_obj_tdata
2170 {
2171 struct elf_obj_tdata elf;
2172
2173 /* A mapping from local symbols to offsets into the various linker
2174 sections added. This is index by the symbol index. */
2175 elf_linker_section_pointers_t **linker_section_pointers;
2176
2177 /* Flags used to auto-detect plt type. */
2178 unsigned int makes_plt_call : 1;
2179 unsigned int has_rel16 : 1;
2180 };
2181
2182 #define ppc_elf_tdata(bfd) \
2183 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2184
2185 #define elf_local_ptr_offsets(bfd) \
2186 (ppc_elf_tdata (bfd)->linker_section_pointers)
2187
2188 #define is_ppc_elf(bfd) \
2189 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2190 && elf_object_id (bfd) == PPC32_ELF_DATA)
2191
2192 /* Override the generic function because we store some extras. */
2193
2194 static bfd_boolean
2195 ppc_elf_mkobject (bfd *abfd)
2196 {
2197 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2198 PPC32_ELF_DATA);
2199 }
2200
2201 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2202
2203 bfd_boolean
2204 _bfd_elf_ppc_set_arch (bfd *abfd)
2205 {
2206 unsigned long mach = 0;
2207 asection *s;
2208 unsigned char *contents;
2209
2210 if (abfd->arch_info->bits_per_word == 32
2211 && bfd_big_endian (abfd))
2212 {
2213
2214 for (s = abfd->sections; s != NULL; s = s->next)
2215 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2216 break;
2217 if (s != NULL)
2218 mach = bfd_mach_ppc_vle;
2219 }
2220
2221 if (mach == 0)
2222 {
2223 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2224 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2225 {
2226 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2227 unsigned int i;
2228
2229 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2230 {
2231 unsigned int val = bfd_get_32 (abfd, contents + i);
2232 switch (val >> 16)
2233 {
2234 case PPC_APUINFO_PMR:
2235 case PPC_APUINFO_RFMCI:
2236 if (mach == 0)
2237 mach = bfd_mach_ppc_titan;
2238 break;
2239
2240 case PPC_APUINFO_ISEL:
2241 case PPC_APUINFO_CACHELCK:
2242 if (mach == bfd_mach_ppc_titan)
2243 mach = bfd_mach_ppc_e500mc;
2244 break;
2245
2246 case PPC_APUINFO_SPE:
2247 case PPC_APUINFO_EFS:
2248 case PPC_APUINFO_BRLOCK:
2249 if (mach != bfd_mach_ppc_vle)
2250 mach = bfd_mach_ppc_e500;
2251 break;
2252
2253 case PPC_APUINFO_VLE:
2254 mach = bfd_mach_ppc_vle;
2255 break;
2256
2257 default:
2258 mach = -1ul;
2259 }
2260 }
2261 free (contents);
2262 }
2263 }
2264
2265 if (mach != 0 && mach != -1ul)
2266 {
2267 const bfd_arch_info_type *arch;
2268
2269 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2270 if (arch->mach == mach)
2271 {
2272 abfd->arch_info = arch;
2273 break;
2274 }
2275 }
2276 return TRUE;
2277 }
2278
2279 /* Fix bad default arch selected for a 32 bit input bfd when the
2280 default is 64 bit. Also select arch based on apuinfo. */
2281
2282 static bfd_boolean
2283 ppc_elf_object_p (bfd *abfd)
2284 {
2285 if (!abfd->arch_info->the_default)
2286 return TRUE;
2287
2288 if (abfd->arch_info->bits_per_word == 64)
2289 {
2290 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2291
2292 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2293 {
2294 /* Relies on arch after 64 bit default being 32 bit default. */
2295 abfd->arch_info = abfd->arch_info->next;
2296 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2297 }
2298 }
2299 return _bfd_elf_ppc_set_arch (abfd);
2300 }
2301
2302 /* Function to set whether a module needs the -mrelocatable bit set. */
2303
2304 static bfd_boolean
2305 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2306 {
2307 BFD_ASSERT (!elf_flags_init (abfd)
2308 || elf_elfheader (abfd)->e_flags == flags);
2309
2310 elf_elfheader (abfd)->e_flags = flags;
2311 elf_flags_init (abfd) = TRUE;
2312 return TRUE;
2313 }
2314
2315 /* Support for core dump NOTE sections. */
2316
2317 static bfd_boolean
2318 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2319 {
2320 int offset;
2321 unsigned int size;
2322
2323 switch (note->descsz)
2324 {
2325 default:
2326 return FALSE;
2327
2328 case 268: /* Linux/PPC. */
2329 /* pr_cursig */
2330 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2331
2332 /* pr_pid */
2333 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2334
2335 /* pr_reg */
2336 offset = 72;
2337 size = 192;
2338
2339 break;
2340 }
2341
2342 /* Make a ".reg/999" section. */
2343 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2344 size, note->descpos + offset);
2345 }
2346
2347 static bfd_boolean
2348 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2349 {
2350 switch (note->descsz)
2351 {
2352 default:
2353 return FALSE;
2354
2355 case 128: /* Linux/PPC elf_prpsinfo. */
2356 elf_tdata (abfd)->core->pid
2357 = bfd_get_32 (abfd, note->descdata + 16);
2358 elf_tdata (abfd)->core->program
2359 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2360 elf_tdata (abfd)->core->command
2361 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2362 }
2363
2364 /* Note that for some reason, a spurious space is tacked
2365 onto the end of the args in some (at least one anyway)
2366 implementations, so strip it off if it exists. */
2367
2368 {
2369 char *command = elf_tdata (abfd)->core->command;
2370 int n = strlen (command);
2371
2372 if (0 < n && command[n - 1] == ' ')
2373 command[n - 1] = '\0';
2374 }
2375
2376 return TRUE;
2377 }
2378
2379 char *
2380 elfcore_write_ppc_linux_prpsinfo32
2381 (bfd *abfd,
2382 char *buf,
2383 int *bufsiz,
2384 const struct elf_internal_linux_prpsinfo *prpsinfo)
2385 {
2386 struct elf_external_ppc_linux_prpsinfo32 data;
2387
2388 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data);
2389 return elfcore_write_note (abfd, buf, bufsiz,
2390 "CORE", NT_PRPSINFO, &data, sizeof (data));
2391 }
2392
2393 static char *
2394 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2395 {
2396 switch (note_type)
2397 {
2398 default:
2399 return NULL;
2400
2401 case NT_PRPSINFO:
2402 {
2403 char data[128];
2404 va_list ap;
2405
2406 va_start (ap, note_type);
2407 memset (data, 0, sizeof (data));
2408 strncpy (data + 32, va_arg (ap, const char *), 16);
2409 strncpy (data + 48, va_arg (ap, const char *), 80);
2410 va_end (ap);
2411 return elfcore_write_note (abfd, buf, bufsiz,
2412 "CORE", note_type, data, sizeof (data));
2413 }
2414
2415 case NT_PRSTATUS:
2416 {
2417 char data[268];
2418 va_list ap;
2419 long pid;
2420 int cursig;
2421 const void *greg;
2422
2423 va_start (ap, note_type);
2424 memset (data, 0, 72);
2425 pid = va_arg (ap, long);
2426 bfd_put_32 (abfd, pid, data + 24);
2427 cursig = va_arg (ap, int);
2428 bfd_put_16 (abfd, cursig, data + 12);
2429 greg = va_arg (ap, const void *);
2430 memcpy (data + 72, greg, 192);
2431 memset (data + 264, 0, 4);
2432 va_end (ap);
2433 return elfcore_write_note (abfd, buf, bufsiz,
2434 "CORE", note_type, data, sizeof (data));
2435 }
2436 }
2437 }
2438
2439 static flagword
2440 ppc_elf_lookup_section_flags (char *flag_name)
2441 {
2442
2443 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2444 return SHF_PPC_VLE;
2445
2446 return 0;
2447 }
2448
2449 /* Return address for Ith PLT stub in section PLT, for relocation REL
2450 or (bfd_vma) -1 if it should not be included. */
2451
2452 static bfd_vma
2453 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2454 const asection *plt ATTRIBUTE_UNUSED,
2455 const arelent *rel)
2456 {
2457 return rel->address;
2458 }
2459
2460 /* Handle a PowerPC specific section when reading an object file. This
2461 is called when bfd_section_from_shdr finds a section with an unknown
2462 type. */
2463
2464 static bfd_boolean
2465 ppc_elf_section_from_shdr (bfd *abfd,
2466 Elf_Internal_Shdr *hdr,
2467 const char *name,
2468 int shindex)
2469 {
2470 asection *newsect;
2471 flagword flags;
2472
2473 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2474 return FALSE;
2475
2476 newsect = hdr->bfd_section;
2477 flags = bfd_get_section_flags (abfd, newsect);
2478 if (hdr->sh_flags & SHF_EXCLUDE)
2479 flags |= SEC_EXCLUDE;
2480
2481 if (hdr->sh_type == SHT_ORDERED)
2482 flags |= SEC_SORT_ENTRIES;
2483
2484 bfd_set_section_flags (abfd, newsect, flags);
2485 return TRUE;
2486 }
2487
2488 /* Set up any other section flags and such that may be necessary. */
2489
2490 static bfd_boolean
2491 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2492 Elf_Internal_Shdr *shdr,
2493 asection *asect)
2494 {
2495 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2496 shdr->sh_type = SHT_ORDERED;
2497
2498 return TRUE;
2499 }
2500
2501 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2502 need to bump up the number of section headers. */
2503
2504 static int
2505 ppc_elf_additional_program_headers (bfd *abfd,
2506 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2507 {
2508 asection *s;
2509 int ret = 0;
2510
2511 s = bfd_get_section_by_name (abfd, ".sbss2");
2512 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2513 ++ret;
2514
2515 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2516 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2517 ++ret;
2518
2519 return ret;
2520 }
2521
2522 /* Modify the segment map for VLE executables. */
2523
2524 bfd_boolean
2525 ppc_elf_modify_segment_map (bfd *abfd,
2526 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2527 {
2528 struct elf_segment_map *m;
2529
2530 /* At this point in the link, output sections have already been sorted by
2531 LMA and assigned to segments. All that is left to do is to ensure
2532 there is no mixing of VLE & non-VLE sections in a text segment.
2533 If we find that case, we split the segment.
2534 We maintain the original output section order. */
2535
2536 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2537 {
2538 struct elf_segment_map *n;
2539 bfd_size_type amt;
2540 unsigned int j, k;
2541 unsigned int p_flags;
2542
2543 if (m->p_type != PT_LOAD || m->count == 0)
2544 continue;
2545
2546 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2547 {
2548 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2549 p_flags |= PF_W;
2550 if ((m->sections[j]->flags & SEC_CODE) != 0)
2551 {
2552 p_flags |= PF_X;
2553 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2554 p_flags |= PF_PPC_VLE;
2555 break;
2556 }
2557 }
2558 if (j != m->count)
2559 while (++j != m->count)
2560 {
2561 unsigned int p_flags1 = PF_R;
2562
2563 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2564 p_flags1 |= PF_W;
2565 if ((m->sections[j]->flags & SEC_CODE) != 0)
2566 {
2567 p_flags1 |= PF_X;
2568 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2569 p_flags1 |= PF_PPC_VLE;
2570 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2571 break;
2572 }
2573 p_flags |= p_flags1;
2574 }
2575 /* If we're splitting a segment which originally contained rw
2576 sections then those sections might now only be in one of the
2577 two parts. So always set p_flags if splitting, even if we
2578 are being called for objcopy with p_flags_valid set. */
2579 if (j != m->count || !m->p_flags_valid)
2580 {
2581 m->p_flags_valid = 1;
2582 m->p_flags = p_flags;
2583 }
2584 if (j == m->count)
2585 continue;
2586
2587 /* Sections 0..j-1 stay in this (current) segment,
2588 the remainder are put in a new segment.
2589 The scan resumes with the new segment. */
2590
2591 amt = sizeof (struct elf_segment_map);
2592 amt += (m->count - j - 1) * sizeof (asection *);
2593 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2594 if (n == NULL)
2595 return FALSE;
2596
2597 n->p_type = PT_LOAD;
2598 n->count = m->count - j;
2599 for (k = 0; k < n->count; ++k)
2600 n->sections[k] = m->sections[j + k];
2601 m->count = j;
2602 m->p_size_valid = 0;
2603 n->next = m->next;
2604 m->next = n;
2605 }
2606
2607 return TRUE;
2608 }
2609
2610 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2611 .PPC.EMB.sbss0 a normal section, and not a bss section so
2612 that the linker doesn't crater when trying to make more than
2613 2 sections. */
2614
2615 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2616 {
2617 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2618 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2619 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2620 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2621 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2622 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2623 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2624 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2625 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2626 { NULL, 0, 0, 0, 0 }
2627 };
2628
2629 /* This is what we want for new plt/got. */
2630 static struct bfd_elf_special_section ppc_alt_plt =
2631 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2632
2633 static const struct bfd_elf_special_section *
2634 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2635 {
2636 const struct bfd_elf_special_section *ssect;
2637
2638 /* See if this is one of the special sections. */
2639 if (sec->name == NULL)
2640 return NULL;
2641
2642 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2643 sec->use_rela_p);
2644 if (ssect != NULL)
2645 {
2646 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2647 ssect = &ppc_alt_plt;
2648 return ssect;
2649 }
2650
2651 return _bfd_elf_get_sec_type_attr (abfd, sec);
2652 }
2653 \f
2654 /* Very simple linked list structure for recording apuinfo values. */
2655 typedef struct apuinfo_list
2656 {
2657 struct apuinfo_list *next;
2658 unsigned long value;
2659 }
2660 apuinfo_list;
2661
2662 static apuinfo_list *head;
2663 static bfd_boolean apuinfo_set;
2664
2665 static void
2666 apuinfo_list_init (void)
2667 {
2668 head = NULL;
2669 apuinfo_set = FALSE;
2670 }
2671
2672 static void
2673 apuinfo_list_add (unsigned long value)
2674 {
2675 apuinfo_list *entry = head;
2676
2677 while (entry != NULL)
2678 {
2679 if (entry->value == value)
2680 return;
2681 entry = entry->next;
2682 }
2683
2684 entry = bfd_malloc (sizeof (* entry));
2685 if (entry == NULL)
2686 return;
2687
2688 entry->value = value;
2689 entry->next = head;
2690 head = entry;
2691 }
2692
2693 static unsigned
2694 apuinfo_list_length (void)
2695 {
2696 apuinfo_list *entry;
2697 unsigned long count;
2698
2699 for (entry = head, count = 0;
2700 entry;
2701 entry = entry->next)
2702 ++ count;
2703
2704 return count;
2705 }
2706
2707 static inline unsigned long
2708 apuinfo_list_element (unsigned long number)
2709 {
2710 apuinfo_list * entry;
2711
2712 for (entry = head;
2713 entry && number --;
2714 entry = entry->next)
2715 ;
2716
2717 return entry ? entry->value : 0;
2718 }
2719
2720 static void
2721 apuinfo_list_finish (void)
2722 {
2723 apuinfo_list *entry;
2724
2725 for (entry = head; entry;)
2726 {
2727 apuinfo_list *next = entry->next;
2728 free (entry);
2729 entry = next;
2730 }
2731
2732 head = NULL;
2733 }
2734
2735 /* Scan the input BFDs and create a linked list of
2736 the APUinfo values that will need to be emitted. */
2737
2738 static void
2739 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2740 {
2741 bfd *ibfd;
2742 asection *asec;
2743 char *buffer = NULL;
2744 bfd_size_type largest_input_size = 0;
2745 unsigned i;
2746 unsigned long length;
2747 const char *error_message = NULL;
2748
2749 if (link_info == NULL)
2750 return;
2751
2752 apuinfo_list_init ();
2753
2754 /* Read in the input sections contents. */
2755 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2756 {
2757 unsigned long datum;
2758
2759 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2760 if (asec == NULL)
2761 continue;
2762
2763 /* xgettext:c-format */
2764 error_message = _("corrupt %s section in %B");
2765 length = asec->size;
2766 if (length < 20)
2767 goto fail;
2768
2769 apuinfo_set = TRUE;
2770 if (largest_input_size < asec->size)
2771 {
2772 if (buffer)
2773 free (buffer);
2774 largest_input_size = asec->size;
2775 buffer = bfd_malloc (largest_input_size);
2776 if (!buffer)
2777 return;
2778 }
2779
2780 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2781 || (bfd_bread (buffer, length, ibfd) != length))
2782 {
2783 /* xgettext:c-format */
2784 error_message = _("unable to read in %s section from %B");
2785 goto fail;
2786 }
2787
2788 /* Verify the contents of the header. Note - we have to
2789 extract the values this way in order to allow for a
2790 host whose endian-ness is different from the target. */
2791 datum = bfd_get_32 (ibfd, buffer);
2792 if (datum != sizeof APUINFO_LABEL)
2793 goto fail;
2794
2795 datum = bfd_get_32 (ibfd, buffer + 8);
2796 if (datum != 0x2)
2797 goto fail;
2798
2799 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2800 goto fail;
2801
2802 /* Get the number of bytes used for apuinfo entries. */
2803 datum = bfd_get_32 (ibfd, buffer + 4);
2804 if (datum + 20 != length)
2805 goto fail;
2806
2807 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2808 for (i = 0; i < datum; i += 4)
2809 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2810 }
2811
2812 error_message = NULL;
2813
2814 if (apuinfo_set)
2815 {
2816 /* Compute the size of the output section. */
2817 unsigned num_entries = apuinfo_list_length ();
2818
2819 /* Set the output section size, if it exists. */
2820 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2821
2822 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2823 {
2824 ibfd = abfd;
2825 /* xgettext:c-format */
2826 error_message = _("warning: unable to set size of %s section in %B");
2827 }
2828 }
2829
2830 fail:
2831 if (buffer)
2832 free (buffer);
2833
2834 if (error_message)
2835 _bfd_error_handler (error_message, ibfd, APUINFO_SECTION_NAME);
2836 }
2837
2838 /* Prevent the output section from accumulating the input sections'
2839 contents. We have already stored this in our linked list structure. */
2840
2841 static bfd_boolean
2842 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2843 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2844 asection *asec,
2845 bfd_byte *contents ATTRIBUTE_UNUSED)
2846 {
2847 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2848 }
2849
2850 /* Finally we can generate the output section. */
2851
2852 static void
2853 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2854 {
2855 bfd_byte *buffer;
2856 asection *asec;
2857 unsigned i;
2858 unsigned num_entries;
2859 bfd_size_type length;
2860
2861 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2862 if (asec == NULL)
2863 return;
2864
2865 if (!apuinfo_set)
2866 return;
2867
2868 length = asec->size;
2869 if (length < 20)
2870 return;
2871
2872 buffer = bfd_malloc (length);
2873 if (buffer == NULL)
2874 {
2875 _bfd_error_handler
2876 (_("failed to allocate space for new APUinfo section."));
2877 return;
2878 }
2879
2880 /* Create the apuinfo header. */
2881 num_entries = apuinfo_list_length ();
2882 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2883 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2884 bfd_put_32 (abfd, 0x2, buffer + 8);
2885 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2886
2887 length = 20;
2888 for (i = 0; i < num_entries; i++)
2889 {
2890 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2891 length += 4;
2892 }
2893
2894 if (length != asec->size)
2895 _bfd_error_handler (_("failed to compute new APUinfo section."));
2896
2897 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2898 _bfd_error_handler (_("failed to install new APUinfo section."));
2899
2900 free (buffer);
2901
2902 apuinfo_list_finish ();
2903 }
2904 \f
2905 static bfd_boolean
2906 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2907 {
2908 bfd_byte buf[GLINK_ENTRY_SIZE];
2909
2910 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2911 return FALSE;
2912
2913 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2914 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2915 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2916 && bfd_get_32 (abfd, buf + 12) == BCTR);
2917 }
2918
2919 static bfd_boolean
2920 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2921 {
2922 bfd_vma vma = *(bfd_vma *) ptr;
2923 return ((section->flags & SEC_ALLOC) != 0
2924 && section->vma <= vma
2925 && vma < section->vma + section->size);
2926 }
2927
2928 static long
2929 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2930 long dynsymcount, asymbol **dynsyms,
2931 asymbol **ret)
2932 {
2933 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2934 asection *plt, *relplt, *dynamic, *glink;
2935 bfd_vma glink_vma = 0;
2936 bfd_vma resolv_vma = 0;
2937 bfd_vma stub_vma;
2938 asymbol *s;
2939 arelent *p;
2940 long count, i;
2941 size_t size;
2942 char *names;
2943 bfd_byte buf[4];
2944
2945 *ret = NULL;
2946
2947 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2948 return 0;
2949
2950 if (dynsymcount <= 0)
2951 return 0;
2952
2953 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2954 if (relplt == NULL)
2955 return 0;
2956
2957 plt = bfd_get_section_by_name (abfd, ".plt");
2958 if (plt == NULL)
2959 return 0;
2960
2961 /* Call common code to handle old-style executable PLTs. */
2962 if (elf_section_flags (plt) & SHF_EXECINSTR)
2963 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2964 dynsymcount, dynsyms, ret);
2965
2966 /* If this object was prelinked, the prelinker stored the address
2967 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2968 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2969 if (dynamic != NULL)
2970 {
2971 bfd_byte *dynbuf, *extdyn, *extdynend;
2972 size_t extdynsize;
2973 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2974
2975 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2976 return -1;
2977
2978 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2979 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2980
2981 extdyn = dynbuf;
2982 extdynend = extdyn + dynamic->size;
2983 for (; extdyn < extdynend; extdyn += extdynsize)
2984 {
2985 Elf_Internal_Dyn dyn;
2986 (*swap_dyn_in) (abfd, extdyn, &dyn);
2987
2988 if (dyn.d_tag == DT_NULL)
2989 break;
2990
2991 if (dyn.d_tag == DT_PPC_GOT)
2992 {
2993 unsigned int g_o_t = dyn.d_un.d_val;
2994 asection *got = bfd_get_section_by_name (abfd, ".got");
2995 if (got != NULL
2996 && bfd_get_section_contents (abfd, got, buf,
2997 g_o_t - got->vma + 4, 4))
2998 glink_vma = bfd_get_32 (abfd, buf);
2999 break;
3000 }
3001 }
3002 free (dynbuf);
3003 }
3004
3005 /* Otherwise we read the first plt entry. */
3006 if (glink_vma == 0)
3007 {
3008 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3009 glink_vma = bfd_get_32 (abfd, buf);
3010 }
3011
3012 if (glink_vma == 0)
3013 return 0;
3014
3015 /* The .glink section usually does not survive the final
3016 link; search for the section (usually .text) where the
3017 glink stubs now reside. */
3018 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3019 if (glink == NULL)
3020 return 0;
3021
3022 /* Determine glink PLT resolver by reading the relative branch
3023 from the first glink stub. */
3024 if (bfd_get_section_contents (abfd, glink, buf,
3025 glink_vma - glink->vma, 4))
3026 {
3027 unsigned int insn = bfd_get_32 (abfd, buf);
3028
3029 /* The first glink stub may either branch to the resolver ... */
3030 insn ^= B;
3031 if ((insn & ~0x3fffffc) == 0)
3032 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3033
3034 /* ... or fall through a bunch of NOPs. */
3035 else if ((insn ^ B ^ NOP) == 0)
3036 for (i = 4;
3037 bfd_get_section_contents (abfd, glink, buf,
3038 glink_vma - glink->vma + i, 4);
3039 i += 4)
3040 if (bfd_get_32 (abfd, buf) != NOP)
3041 {
3042 resolv_vma = glink_vma + i;
3043 break;
3044 }
3045 }
3046
3047 count = relplt->size / sizeof (Elf32_External_Rela);
3048 /* If the stubs are those for -shared/-pie then we might have
3049 multiple stubs for each plt entry. If that is the case then
3050 there is no way to associate stubs with their plt entries short
3051 of figuring out the GOT pointer value used in the stub. */
3052 if (!is_nonpic_glink_stub (abfd, glink,
3053 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3054 return 0;
3055
3056 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3057 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3058 return -1;
3059
3060 size = count * sizeof (asymbol);
3061 p = relplt->relocation;
3062 for (i = 0; i < count; i++, p++)
3063 {
3064 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3065 if (p->addend != 0)
3066 size += sizeof ("+0x") - 1 + 8;
3067 }
3068
3069 size += sizeof (asymbol) + sizeof ("__glink");
3070
3071 if (resolv_vma)
3072 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3073
3074 s = *ret = bfd_malloc (size);
3075 if (s == NULL)
3076 return -1;
3077
3078 stub_vma = glink_vma;
3079 names = (char *) (s + count + 1 + (resolv_vma != 0));
3080 p = relplt->relocation + count - 1;
3081 for (i = 0; i < count; i++)
3082 {
3083 size_t len;
3084
3085 *s = **p->sym_ptr_ptr;
3086 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3087 we are defining a symbol, ensure one of them is set. */
3088 if ((s->flags & BSF_LOCAL) == 0)
3089 s->flags |= BSF_GLOBAL;
3090 s->flags |= BSF_SYNTHETIC;
3091 s->section = glink;
3092 stub_vma -= 16;
3093 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3094 stub_vma -= 32;
3095 s->value = stub_vma - glink->vma;
3096 s->name = names;
3097 s->udata.p = NULL;
3098 len = strlen ((*p->sym_ptr_ptr)->name);
3099 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3100 names += len;
3101 if (p->addend != 0)
3102 {
3103 memcpy (names, "+0x", sizeof ("+0x") - 1);
3104 names += sizeof ("+0x") - 1;
3105 bfd_sprintf_vma (abfd, names, p->addend);
3106 names += strlen (names);
3107 }
3108 memcpy (names, "@plt", sizeof ("@plt"));
3109 names += sizeof ("@plt");
3110 ++s;
3111 --p;
3112 }
3113
3114 /* Add a symbol at the start of the glink branch table. */
3115 memset (s, 0, sizeof *s);
3116 s->the_bfd = abfd;
3117 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3118 s->section = glink;
3119 s->value = glink_vma - glink->vma;
3120 s->name = names;
3121 memcpy (names, "__glink", sizeof ("__glink"));
3122 names += sizeof ("__glink");
3123 s++;
3124 count++;
3125
3126 if (resolv_vma)
3127 {
3128 /* Add a symbol for the glink PLT resolver. */
3129 memset (s, 0, sizeof *s);
3130 s->the_bfd = abfd;
3131 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3132 s->section = glink;
3133 s->value = resolv_vma - glink->vma;
3134 s->name = names;
3135 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3136 names += sizeof ("__glink_PLTresolve");
3137 s++;
3138 count++;
3139 }
3140
3141 return count;
3142 }
3143 \f
3144 /* The following functions are specific to the ELF linker, while
3145 functions above are used generally. They appear in this file more
3146 or less in the order in which they are called. eg.
3147 ppc_elf_check_relocs is called early in the link process,
3148 ppc_elf_finish_dynamic_sections is one of the last functions
3149 called. */
3150
3151 /* Track PLT entries needed for a given symbol. We might need more
3152 than one glink entry per symbol when generating a pic binary. */
3153 struct plt_entry
3154 {
3155 struct plt_entry *next;
3156
3157 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3158 This field stores the offset into .got2 used to initialise the
3159 GOT pointer reg. It will always be at least 32768. (Current
3160 gcc always uses an offset of 32768, but ld -r will pack .got2
3161 sections together resulting in larger offsets). */
3162 bfd_vma addend;
3163
3164 /* The .got2 section. */
3165 asection *sec;
3166
3167 /* PLT refcount or offset. */
3168 union
3169 {
3170 bfd_signed_vma refcount;
3171 bfd_vma offset;
3172 } plt;
3173
3174 /* .glink stub offset. */
3175 bfd_vma glink_offset;
3176 };
3177
3178 /* Of those relocs that might be copied as dynamic relocs, this function
3179 selects those that must be copied when linking a shared library,
3180 even when the symbol is local. */
3181
3182 static int
3183 must_be_dyn_reloc (struct bfd_link_info *info,
3184 enum elf_ppc_reloc_type r_type)
3185 {
3186 switch (r_type)
3187 {
3188 default:
3189 return 1;
3190
3191 case R_PPC_REL24:
3192 case R_PPC_REL14:
3193 case R_PPC_REL14_BRTAKEN:
3194 case R_PPC_REL14_BRNTAKEN:
3195 case R_PPC_REL32:
3196 return 0;
3197
3198 case R_PPC_TPREL32:
3199 case R_PPC_TPREL16:
3200 case R_PPC_TPREL16_LO:
3201 case R_PPC_TPREL16_HI:
3202 case R_PPC_TPREL16_HA:
3203 return !bfd_link_executable (info);
3204 }
3205 }
3206
3207 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3208 copying dynamic variables from a shared lib into an app's dynbss
3209 section, and instead use a dynamic relocation to point into the
3210 shared lib. */
3211 #define ELIMINATE_COPY_RELOCS 1
3212
3213 /* Used to track dynamic relocations for local symbols. */
3214 struct ppc_dyn_relocs
3215 {
3216 struct ppc_dyn_relocs *next;
3217
3218 /* The input section of the reloc. */
3219 asection *sec;
3220
3221 /* Total number of relocs copied for the input section. */
3222 unsigned int count : 31;
3223
3224 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3225 unsigned int ifunc : 1;
3226 };
3227
3228 /* PPC ELF linker hash entry. */
3229
3230 struct ppc_elf_link_hash_entry
3231 {
3232 struct elf_link_hash_entry elf;
3233
3234 /* If this symbol is used in the linker created sections, the processor
3235 specific backend uses this field to map the field into the offset
3236 from the beginning of the section. */
3237 elf_linker_section_pointers_t *linker_section_pointer;
3238
3239 /* Track dynamic relocs copied for this symbol. */
3240 struct elf_dyn_relocs *dyn_relocs;
3241
3242 /* Contexts in which symbol is used in the GOT (or TOC).
3243 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3244 corresponding relocs are encountered during check_relocs.
3245 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3246 indicate the corresponding GOT entry type is not needed. */
3247 #define TLS_GD 1 /* GD reloc. */
3248 #define TLS_LD 2 /* LD reloc. */
3249 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3250 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3251 #define TLS_TLS 16 /* Any TLS reloc. */
3252 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3253 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3254 char tls_mask;
3255
3256 /* Nonzero if we have seen a small data relocation referring to this
3257 symbol. */
3258 unsigned char has_sda_refs : 1;
3259
3260 /* Flag use of given relocations. */
3261 unsigned char has_addr16_ha : 1;
3262 unsigned char has_addr16_lo : 1;
3263 };
3264
3265 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3266
3267 /* PPC ELF linker hash table. */
3268
3269 struct ppc_elf_link_hash_table
3270 {
3271 struct elf_link_hash_table elf;
3272
3273 /* Various options passed from the linker. */
3274 struct ppc_elf_params *params;
3275
3276 /* Short-cuts to get to dynamic linker sections. */
3277 asection *got;
3278 asection *relgot;
3279 asection *glink;
3280 asection *plt;
3281 asection *relplt;
3282 asection *iplt;
3283 asection *reliplt;
3284 asection *dynbss;
3285 asection *relbss;
3286 asection *dynsbss;
3287 asection *relsbss;
3288 elf_linker_section_t sdata[2];
3289 asection *sbss;
3290 asection *glink_eh_frame;
3291
3292 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3293 asection *srelplt2;
3294
3295 /* The .got.plt section (VxWorks only)*/
3296 asection *sgotplt;
3297
3298 /* Shortcut to __tls_get_addr. */
3299 struct elf_link_hash_entry *tls_get_addr;
3300
3301 /* The bfd that forced an old-style PLT. */
3302 bfd *old_bfd;
3303
3304 /* TLS local dynamic got entry handling. */
3305 union {
3306 bfd_signed_vma refcount;
3307 bfd_vma offset;
3308 } tlsld_got;
3309
3310 /* Offset of branch table to PltResolve function in glink. */
3311 bfd_vma glink_pltresolve;
3312
3313 /* Size of reserved GOT entries. */
3314 unsigned int got_header_size;
3315 /* Non-zero if allocating the header left a gap. */
3316 unsigned int got_gap;
3317
3318 /* The type of PLT we have chosen to use. */
3319 enum ppc_elf_plt_type plt_type;
3320
3321 /* True if the target system is VxWorks. */
3322 unsigned int is_vxworks:1;
3323
3324 /* The size of PLT entries. */
3325 int plt_entry_size;
3326 /* The distance between adjacent PLT slots. */
3327 int plt_slot_size;
3328 /* The size of the first PLT entry. */
3329 int plt_initial_entry_size;
3330
3331 /* Small local sym cache. */
3332 struct sym_cache sym_cache;
3333 };
3334
3335 /* Rename some of the generic section flags to better document how they
3336 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3337
3338 /* Nonzero if this section has TLS related relocations. */
3339 #define has_tls_reloc sec_flg0
3340
3341 /* Nonzero if this section has a call to __tls_get_addr. */
3342 #define has_tls_get_addr_call sec_flg1
3343
3344 /* Get the PPC ELF linker hash table from a link_info structure. */
3345
3346 #define ppc_elf_hash_table(p) \
3347 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3348 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3349
3350 /* Create an entry in a PPC ELF linker hash table. */
3351
3352 static struct bfd_hash_entry *
3353 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3354 struct bfd_hash_table *table,
3355 const char *string)
3356 {
3357 /* Allocate the structure if it has not already been allocated by a
3358 subclass. */
3359 if (entry == NULL)
3360 {
3361 entry = bfd_hash_allocate (table,
3362 sizeof (struct ppc_elf_link_hash_entry));
3363 if (entry == NULL)
3364 return entry;
3365 }
3366
3367 /* Call the allocation method of the superclass. */
3368 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3369 if (entry != NULL)
3370 {
3371 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3372 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3373 ppc_elf_hash_entry (entry)->tls_mask = 0;
3374 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3375 }
3376
3377 return entry;
3378 }
3379
3380 /* Create a PPC ELF linker hash table. */
3381
3382 static struct bfd_link_hash_table *
3383 ppc_elf_link_hash_table_create (bfd *abfd)
3384 {
3385 struct ppc_elf_link_hash_table *ret;
3386 static struct ppc_elf_params default_params
3387 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0 };
3388
3389 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3390 if (ret == NULL)
3391 return NULL;
3392
3393 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3394 ppc_elf_link_hash_newfunc,
3395 sizeof (struct ppc_elf_link_hash_entry),
3396 PPC32_ELF_DATA))
3397 {
3398 free (ret);
3399 return NULL;
3400 }
3401
3402 ret->elf.init_plt_refcount.refcount = 0;
3403 ret->elf.init_plt_refcount.glist = NULL;
3404 ret->elf.init_plt_offset.offset = 0;
3405 ret->elf.init_plt_offset.glist = NULL;
3406
3407 ret->params = &default_params;
3408
3409 ret->sdata[0].name = ".sdata";
3410 ret->sdata[0].sym_name = "_SDA_BASE_";
3411 ret->sdata[0].bss_name = ".sbss";
3412
3413 ret->sdata[1].name = ".sdata2";
3414 ret->sdata[1].sym_name = "_SDA2_BASE_";
3415 ret->sdata[1].bss_name = ".sbss2";
3416
3417 ret->plt_entry_size = 12;
3418 ret->plt_slot_size = 8;
3419 ret->plt_initial_entry_size = 72;
3420
3421 return &ret->elf.root;
3422 }
3423
3424 /* Hook linker params into hash table. */
3425
3426 void
3427 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3428 {
3429 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3430
3431 if (htab)
3432 htab->params = params;
3433 params->pagesize_p2 = bfd_log2 (params->pagesize);
3434 }
3435
3436 /* Create .got and the related sections. */
3437
3438 static bfd_boolean
3439 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3440 {
3441 struct ppc_elf_link_hash_table *htab;
3442 asection *s;
3443 flagword flags;
3444
3445 if (!_bfd_elf_create_got_section (abfd, info))
3446 return FALSE;
3447
3448 htab = ppc_elf_hash_table (info);
3449 htab->got = s = bfd_get_linker_section (abfd, ".got");
3450 if (s == NULL)
3451 abort ();
3452
3453 if (htab->is_vxworks)
3454 {
3455 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3456 if (!htab->sgotplt)
3457 abort ();
3458 }
3459 else
3460 {
3461 /* The powerpc .got has a blrl instruction in it. Mark it
3462 executable. */
3463 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3464 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3465 if (!bfd_set_section_flags (abfd, s, flags))
3466 return FALSE;
3467 }
3468
3469 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3470 if (!htab->relgot)
3471 abort ();
3472
3473 return TRUE;
3474 }
3475
3476 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3477 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3478 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3479
3480 static bfd_boolean
3481 ppc_elf_create_linker_section (bfd *abfd,
3482 struct bfd_link_info *info,
3483 flagword flags,
3484 elf_linker_section_t *lsect)
3485 {
3486 asection *s;
3487
3488 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3489 | SEC_LINKER_CREATED);
3490
3491 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3492 if (s == NULL)
3493 return FALSE;
3494 lsect->section = s;
3495
3496 /* Define the sym on the first section of this name. */
3497 s = bfd_get_section_by_name (abfd, lsect->name);
3498
3499 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3500 if (lsect->sym == NULL)
3501 return FALSE;
3502 lsect->sym->root.u.def.value = 0x8000;
3503 return TRUE;
3504 }
3505
3506 static bfd_boolean
3507 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3508 {
3509 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3510 asection *s;
3511 flagword flags;
3512
3513 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3514 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3515 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3516 htab->glink = s;
3517 if (s == NULL
3518 || !bfd_set_section_alignment (abfd, s,
3519 htab->params->ppc476_workaround ? 6 : 4))
3520 return FALSE;
3521
3522 if (!info->no_ld_generated_unwind_info)
3523 {
3524 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3525 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3526 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3527 htab->glink_eh_frame = s;
3528 if (s == NULL
3529 || !bfd_set_section_alignment (abfd, s, 2))
3530 return FALSE;
3531 }
3532
3533 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3534 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3535 htab->iplt = s;
3536 if (s == NULL
3537 || !bfd_set_section_alignment (abfd, s, 4))
3538 return FALSE;
3539
3540 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3541 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3542 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3543 htab->reliplt = s;
3544 if (s == NULL
3545 || ! bfd_set_section_alignment (abfd, s, 2))
3546 return FALSE;
3547
3548 if (!ppc_elf_create_linker_section (abfd, info, 0,
3549 &htab->sdata[0]))
3550 return FALSE;
3551
3552 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3553 &htab->sdata[1]))
3554 return FALSE;
3555
3556 return TRUE;
3557 }
3558
3559 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3560 to output sections (just like _bfd_elf_create_dynamic_sections has
3561 to create .dynbss and .rela.bss). */
3562
3563 static bfd_boolean
3564 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3565 {
3566 struct ppc_elf_link_hash_table *htab;
3567 asection *s;
3568 flagword flags;
3569
3570 htab = ppc_elf_hash_table (info);
3571
3572 if (htab->got == NULL
3573 && !ppc_elf_create_got (abfd, info))
3574 return FALSE;
3575
3576 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3577 return FALSE;
3578
3579 if (htab->glink == NULL
3580 && !ppc_elf_create_glink (abfd, info))
3581 return FALSE;
3582
3583 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3584 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3585 SEC_ALLOC | SEC_LINKER_CREATED);
3586 htab->dynsbss = s;
3587 if (s == NULL)
3588 return FALSE;
3589
3590 if (! bfd_link_pic (info))
3591 {
3592 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3593 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3594 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3595 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3596 htab->relsbss = s;
3597 if (s == NULL
3598 || ! bfd_set_section_alignment (abfd, s, 2))
3599 return FALSE;
3600 }
3601
3602 if (htab->is_vxworks
3603 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3604 return FALSE;
3605
3606 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3607 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3608 if (s == NULL)
3609 abort ();
3610
3611 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3612 if (htab->plt_type == PLT_VXWORKS)
3613 /* The VxWorks PLT is a loaded section with contents. */
3614 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3615 return bfd_set_section_flags (abfd, s, flags);
3616 }
3617
3618 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3619
3620 static void
3621 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3622 struct elf_link_hash_entry *dir,
3623 struct elf_link_hash_entry *ind)
3624 {
3625 struct ppc_elf_link_hash_entry *edir, *eind;
3626
3627 edir = (struct ppc_elf_link_hash_entry *) dir;
3628 eind = (struct ppc_elf_link_hash_entry *) ind;
3629
3630 edir->tls_mask |= eind->tls_mask;
3631 edir->has_sda_refs |= eind->has_sda_refs;
3632
3633 /* If called to transfer flags for a weakdef during processing
3634 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3635 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3636 if (!(ELIMINATE_COPY_RELOCS
3637 && eind->elf.root.type != bfd_link_hash_indirect
3638 && edir->elf.dynamic_adjusted))
3639 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3640
3641 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3642 edir->elf.ref_regular |= eind->elf.ref_regular;
3643 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3644 edir->elf.needs_plt |= eind->elf.needs_plt;
3645 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3646
3647 if (eind->dyn_relocs != NULL)
3648 {
3649 if (edir->dyn_relocs != NULL)
3650 {
3651 struct elf_dyn_relocs **pp;
3652 struct elf_dyn_relocs *p;
3653
3654 /* Add reloc counts against the indirect sym to the direct sym
3655 list. Merge any entries against the same section. */
3656 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3657 {
3658 struct elf_dyn_relocs *q;
3659
3660 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3661 if (q->sec == p->sec)
3662 {
3663 q->pc_count += p->pc_count;
3664 q->count += p->count;
3665 *pp = p->next;
3666 break;
3667 }
3668 if (q == NULL)
3669 pp = &p->next;
3670 }
3671 *pp = edir->dyn_relocs;
3672 }
3673
3674 edir->dyn_relocs = eind->dyn_relocs;
3675 eind->dyn_relocs = NULL;
3676 }
3677
3678 /* If we were called to copy over info for a weak sym, that's all.
3679 You might think dyn_relocs need not be copied over; After all,
3680 both syms will be dynamic or both non-dynamic so we're just
3681 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3682 code in ppc_elf_adjust_dynamic_symbol needs to check for
3683 dyn_relocs in read-only sections, and it does so on what is the
3684 DIR sym here. */
3685 if (eind->elf.root.type != bfd_link_hash_indirect)
3686 return;
3687
3688 /* Copy over the GOT refcount entries that we may have already seen to
3689 the symbol which just became indirect. */
3690 edir->elf.got.refcount += eind->elf.got.refcount;
3691 eind->elf.got.refcount = 0;
3692
3693 /* And plt entries. */
3694 if (eind->elf.plt.plist != NULL)
3695 {
3696 if (edir->elf.plt.plist != NULL)
3697 {
3698 struct plt_entry **entp;
3699 struct plt_entry *ent;
3700
3701 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3702 {
3703 struct plt_entry *dent;
3704
3705 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3706 if (dent->sec == ent->sec && dent->addend == ent->addend)
3707 {
3708 dent->plt.refcount += ent->plt.refcount;
3709 *entp = ent->next;
3710 break;
3711 }
3712 if (dent == NULL)
3713 entp = &ent->next;
3714 }
3715 *entp = edir->elf.plt.plist;
3716 }
3717
3718 edir->elf.plt.plist = eind->elf.plt.plist;
3719 eind->elf.plt.plist = NULL;
3720 }
3721
3722 if (eind->elf.dynindx != -1)
3723 {
3724 if (edir->elf.dynindx != -1)
3725 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3726 edir->elf.dynstr_index);
3727 edir->elf.dynindx = eind->elf.dynindx;
3728 edir->elf.dynstr_index = eind->elf.dynstr_index;
3729 eind->elf.dynindx = -1;
3730 eind->elf.dynstr_index = 0;
3731 }
3732 }
3733
3734 /* Hook called by the linker routine which adds symbols from an object
3735 file. We use it to put .comm items in .sbss, and not .bss. */
3736
3737 static bfd_boolean
3738 ppc_elf_add_symbol_hook (bfd *abfd,
3739 struct bfd_link_info *info,
3740 Elf_Internal_Sym *sym,
3741 const char **namep ATTRIBUTE_UNUSED,
3742 flagword *flagsp ATTRIBUTE_UNUSED,
3743 asection **secp,
3744 bfd_vma *valp)
3745 {
3746 if (sym->st_shndx == SHN_COMMON
3747 && !bfd_link_relocatable (info)
3748 && is_ppc_elf (info->output_bfd)
3749 && sym->st_size <= elf_gp_size (abfd))
3750 {
3751 /* Common symbols less than or equal to -G nn bytes are automatically
3752 put into .sbss. */
3753 struct ppc_elf_link_hash_table *htab;
3754
3755 htab = ppc_elf_hash_table (info);
3756 if (htab->sbss == NULL)
3757 {
3758 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3759
3760 if (!htab->elf.dynobj)
3761 htab->elf.dynobj = abfd;
3762
3763 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3764 ".sbss",
3765 flags);
3766 if (htab->sbss == NULL)
3767 return FALSE;
3768 }
3769
3770 *secp = htab->sbss;
3771 *valp = sym->st_size;
3772 }
3773
3774 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3775 && (abfd->flags & DYNAMIC) == 0
3776 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3777 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3778
3779 return TRUE;
3780 }
3781 \f
3782 /* Find a linker generated pointer with a given addend and type. */
3783
3784 static elf_linker_section_pointers_t *
3785 elf_find_pointer_linker_section
3786 (elf_linker_section_pointers_t *linker_pointers,
3787 bfd_vma addend,
3788 elf_linker_section_t *lsect)
3789 {
3790 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3791 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3792 return linker_pointers;
3793
3794 return NULL;
3795 }
3796
3797 /* Allocate a pointer to live in a linker created section. */
3798
3799 static bfd_boolean
3800 elf_allocate_pointer_linker_section (bfd *abfd,
3801 elf_linker_section_t *lsect,
3802 struct elf_link_hash_entry *h,
3803 const Elf_Internal_Rela *rel)
3804 {
3805 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3806 elf_linker_section_pointers_t *linker_section_ptr;
3807 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3808 bfd_size_type amt;
3809
3810 BFD_ASSERT (lsect != NULL);
3811
3812 /* Is this a global symbol? */
3813 if (h != NULL)
3814 {
3815 struct ppc_elf_link_hash_entry *eh;
3816
3817 /* Has this symbol already been allocated? If so, our work is done. */
3818 eh = (struct ppc_elf_link_hash_entry *) h;
3819 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3820 rel->r_addend,
3821 lsect))
3822 return TRUE;
3823
3824 ptr_linker_section_ptr = &eh->linker_section_pointer;
3825 }
3826 else
3827 {
3828 BFD_ASSERT (is_ppc_elf (abfd));
3829
3830 /* Allocation of a pointer to a local symbol. */
3831 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3832
3833 /* Allocate a table to hold the local symbols if first time. */
3834 if (!ptr)
3835 {
3836 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3837
3838 amt = num_symbols;
3839 amt *= sizeof (elf_linker_section_pointers_t *);
3840 ptr = bfd_zalloc (abfd, amt);
3841
3842 if (!ptr)
3843 return FALSE;
3844
3845 elf_local_ptr_offsets (abfd) = ptr;
3846 }
3847
3848 /* Has this symbol already been allocated? If so, our work is done. */
3849 if (elf_find_pointer_linker_section (ptr[r_symndx],
3850 rel->r_addend,
3851 lsect))
3852 return TRUE;
3853
3854 ptr_linker_section_ptr = &ptr[r_symndx];
3855 }
3856
3857 /* Allocate space for a pointer in the linker section, and allocate
3858 a new pointer record from internal memory. */
3859 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3860 amt = sizeof (elf_linker_section_pointers_t);
3861 linker_section_ptr = bfd_alloc (abfd, amt);
3862
3863 if (!linker_section_ptr)
3864 return FALSE;
3865
3866 linker_section_ptr->next = *ptr_linker_section_ptr;
3867 linker_section_ptr->addend = rel->r_addend;
3868 linker_section_ptr->lsect = lsect;
3869 *ptr_linker_section_ptr = linker_section_ptr;
3870
3871 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3872 return FALSE;
3873 linker_section_ptr->offset = lsect->section->size;
3874 lsect->section->size += 4;
3875
3876 #ifdef DEBUG
3877 fprintf (stderr,
3878 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3879 lsect->name, (long) linker_section_ptr->offset,
3880 (long) lsect->section->size);
3881 #endif
3882
3883 return TRUE;
3884 }
3885
3886 static struct plt_entry **
3887 update_local_sym_info (bfd *abfd,
3888 Elf_Internal_Shdr *symtab_hdr,
3889 unsigned long r_symndx,
3890 int tls_type)
3891 {
3892 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3893 struct plt_entry **local_plt;
3894 char *local_got_tls_masks;
3895
3896 if (local_got_refcounts == NULL)
3897 {
3898 bfd_size_type size = symtab_hdr->sh_info;
3899
3900 size *= (sizeof (*local_got_refcounts)
3901 + sizeof (*local_plt)
3902 + sizeof (*local_got_tls_masks));
3903 local_got_refcounts = bfd_zalloc (abfd, size);
3904 if (local_got_refcounts == NULL)
3905 return NULL;
3906 elf_local_got_refcounts (abfd) = local_got_refcounts;
3907 }
3908
3909 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3910 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3911 local_got_tls_masks[r_symndx] |= tls_type;
3912 if (tls_type != PLT_IFUNC)
3913 local_got_refcounts[r_symndx] += 1;
3914 return local_plt + r_symndx;
3915 }
3916
3917 static bfd_boolean
3918 update_plt_info (bfd *abfd, struct plt_entry **plist,
3919 asection *sec, bfd_vma addend)
3920 {
3921 struct plt_entry *ent;
3922
3923 if (addend < 32768)
3924 sec = NULL;
3925 for (ent = *plist; ent != NULL; ent = ent->next)
3926 if (ent->sec == sec && ent->addend == addend)
3927 break;
3928 if (ent == NULL)
3929 {
3930 bfd_size_type amt = sizeof (*ent);
3931 ent = bfd_alloc (abfd, amt);
3932 if (ent == NULL)
3933 return FALSE;
3934 ent->next = *plist;
3935 ent->sec = sec;
3936 ent->addend = addend;
3937 ent->plt.refcount = 0;
3938 *plist = ent;
3939 }
3940 ent->plt.refcount += 1;
3941 return TRUE;
3942 }
3943
3944 static struct plt_entry *
3945 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3946 {
3947 struct plt_entry *ent;
3948
3949 if (addend < 32768)
3950 sec = NULL;
3951 for (ent = *plist; ent != NULL; ent = ent->next)
3952 if (ent->sec == sec && ent->addend == addend)
3953 break;
3954 return ent;
3955 }
3956
3957 static bfd_boolean
3958 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3959 {
3960 return (r_type == R_PPC_PLTREL24
3961 || r_type == R_PPC_LOCAL24PC
3962 || r_type == R_PPC_REL24
3963 || r_type == R_PPC_REL14
3964 || r_type == R_PPC_REL14_BRTAKEN
3965 || r_type == R_PPC_REL14_BRNTAKEN
3966 || r_type == R_PPC_ADDR24
3967 || r_type == R_PPC_ADDR14
3968 || r_type == R_PPC_ADDR14_BRTAKEN
3969 || r_type == R_PPC_ADDR14_BRNTAKEN
3970 || r_type == R_PPC_VLE_REL24);
3971 }
3972
3973 static void
3974 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3975 {
3976 _bfd_error_handler
3977 /* xgettext:c-format */
3978 (_("%B: relocation %s cannot be used when making a shared object"),
3979 abfd,
3980 ppc_elf_howto_table[r_type]->name);
3981 bfd_set_error (bfd_error_bad_value);
3982 }
3983
3984 /* Look through the relocs for a section during the first phase, and
3985 allocate space in the global offset table or procedure linkage
3986 table. */
3987
3988 static bfd_boolean
3989 ppc_elf_check_relocs (bfd *abfd,
3990 struct bfd_link_info *info,
3991 asection *sec,
3992 const Elf_Internal_Rela *relocs)
3993 {
3994 struct ppc_elf_link_hash_table *htab;
3995 Elf_Internal_Shdr *symtab_hdr;
3996 struct elf_link_hash_entry **sym_hashes;
3997 const Elf_Internal_Rela *rel;
3998 const Elf_Internal_Rela *rel_end;
3999 asection *got2, *sreloc;
4000 struct elf_link_hash_entry *tga;
4001
4002 if (bfd_link_relocatable (info))
4003 return TRUE;
4004
4005 /* Don't do anything special with non-loaded, non-alloced sections.
4006 In particular, any relocs in such sections should not affect GOT
4007 and PLT reference counting (ie. we don't allow them to create GOT
4008 or PLT entries), there's no possibility or desire to optimize TLS
4009 relocs, and there's not much point in propagating relocs to shared
4010 libs that the dynamic linker won't relocate. */
4011 if ((sec->flags & SEC_ALLOC) == 0)
4012 return TRUE;
4013
4014 #ifdef DEBUG
4015 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
4016 sec, abfd);
4017 #endif
4018
4019 BFD_ASSERT (is_ppc_elf (abfd));
4020
4021 /* Initialize howto table if not already done. */
4022 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4023 ppc_elf_howto_init ();
4024
4025 htab = ppc_elf_hash_table (info);
4026 if (htab->glink == NULL)
4027 {
4028 if (htab->elf.dynobj == NULL)
4029 htab->elf.dynobj = abfd;
4030 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4031 return FALSE;
4032 }
4033 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4034 FALSE, FALSE, TRUE);
4035 symtab_hdr = &elf_symtab_hdr (abfd);
4036 sym_hashes = elf_sym_hashes (abfd);
4037 got2 = bfd_get_section_by_name (abfd, ".got2");
4038 sreloc = NULL;
4039
4040 rel_end = relocs + sec->reloc_count;
4041 for (rel = relocs; rel < rel_end; rel++)
4042 {
4043 unsigned long r_symndx;
4044 enum elf_ppc_reloc_type r_type;
4045 struct elf_link_hash_entry *h;
4046 int tls_type;
4047 struct plt_entry **ifunc;
4048
4049 r_symndx = ELF32_R_SYM (rel->r_info);
4050 if (r_symndx < symtab_hdr->sh_info)
4051 h = NULL;
4052 else
4053 {
4054 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4055 while (h->root.type == bfd_link_hash_indirect
4056 || h->root.type == bfd_link_hash_warning)
4057 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4058
4059 /* PR15323, ref flags aren't set for references in the same
4060 object. */
4061 h->root.non_ir_ref = 1;
4062 }
4063
4064 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4065 This shows up in particular in an R_PPC_ADDR32 in the eabi
4066 startup code. */
4067 if (h != NULL
4068 && htab->got == NULL
4069 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4070 {
4071 if (htab->elf.dynobj == NULL)
4072 htab->elf.dynobj = abfd;
4073 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4074 return FALSE;
4075 BFD_ASSERT (h == htab->elf.hgot);
4076 }
4077
4078 tls_type = 0;
4079 r_type = ELF32_R_TYPE (rel->r_info);
4080 ifunc = NULL;
4081 if (h == NULL && !htab->is_vxworks)
4082 {
4083 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4084 abfd, r_symndx);
4085 if (isym == NULL)
4086 return FALSE;
4087
4088 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4089 {
4090 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4091 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4092 PLT_IFUNC);
4093 if (ifunc == NULL)
4094 return FALSE;
4095
4096 /* STT_GNU_IFUNC symbols must have a PLT entry;
4097 In a non-pie executable even when there are
4098 no plt calls. */
4099 if (!bfd_link_pic (info)
4100 || is_branch_reloc (r_type))
4101 {
4102 bfd_vma addend = 0;
4103 if (r_type == R_PPC_PLTREL24)
4104 {
4105 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4106 if (bfd_link_pic (info))
4107 addend = rel->r_addend;
4108 }
4109 if (!update_plt_info (abfd, ifunc, got2, addend))
4110 return FALSE;
4111 }
4112 }
4113 }
4114
4115 if (!htab->is_vxworks
4116 && is_branch_reloc (r_type)
4117 && h != NULL
4118 && h == tga)
4119 {
4120 if (rel != relocs
4121 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4122 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4123 /* We have a new-style __tls_get_addr call with a marker
4124 reloc. */
4125 ;
4126 else
4127 /* Mark this section as having an old-style call. */
4128 sec->has_tls_get_addr_call = 1;
4129 }
4130
4131 switch (r_type)
4132 {
4133 case R_PPC_TLSGD:
4134 case R_PPC_TLSLD:
4135 /* These special tls relocs tie a call to __tls_get_addr with
4136 its parameter symbol. */
4137 break;
4138
4139 case R_PPC_GOT_TLSLD16:
4140 case R_PPC_GOT_TLSLD16_LO:
4141 case R_PPC_GOT_TLSLD16_HI:
4142 case R_PPC_GOT_TLSLD16_HA:
4143 tls_type = TLS_TLS | TLS_LD;
4144 goto dogottls;
4145
4146 case R_PPC_GOT_TLSGD16:
4147 case R_PPC_GOT_TLSGD16_LO:
4148 case R_PPC_GOT_TLSGD16_HI:
4149 case R_PPC_GOT_TLSGD16_HA:
4150 tls_type = TLS_TLS | TLS_GD;
4151 goto dogottls;
4152
4153 case R_PPC_GOT_TPREL16:
4154 case R_PPC_GOT_TPREL16_LO:
4155 case R_PPC_GOT_TPREL16_HI:
4156 case R_PPC_GOT_TPREL16_HA:
4157 if (bfd_link_pic (info))
4158 info->flags |= DF_STATIC_TLS;
4159 tls_type = TLS_TLS | TLS_TPREL;
4160 goto dogottls;
4161
4162 case R_PPC_GOT_DTPREL16:
4163 case R_PPC_GOT_DTPREL16_LO:
4164 case R_PPC_GOT_DTPREL16_HI:
4165 case R_PPC_GOT_DTPREL16_HA:
4166 tls_type = TLS_TLS | TLS_DTPREL;
4167 dogottls:
4168 sec->has_tls_reloc = 1;
4169 /* Fall through. */
4170
4171 /* GOT16 relocations */
4172 case R_PPC_GOT16:
4173 case R_PPC_GOT16_LO:
4174 case R_PPC_GOT16_HI:
4175 case R_PPC_GOT16_HA:
4176 /* This symbol requires a global offset table entry. */
4177 if (htab->got == NULL)
4178 {
4179 if (htab->elf.dynobj == NULL)
4180 htab->elf.dynobj = abfd;
4181 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4182 return FALSE;
4183 }
4184 if (h != NULL)
4185 {
4186 h->got.refcount += 1;
4187 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4188 }
4189 else
4190 /* This is a global offset table entry for a local symbol. */
4191 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4192 return FALSE;
4193
4194 /* We may also need a plt entry if the symbol turns out to be
4195 an ifunc. */
4196 if (h != NULL && !bfd_link_pic (info))
4197 {
4198 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4199 return FALSE;
4200 }
4201 break;
4202
4203 /* Indirect .sdata relocation. */
4204 case R_PPC_EMB_SDAI16:
4205 if (bfd_link_pic (info))
4206 {
4207 bad_shared_reloc (abfd, r_type);
4208 return FALSE;
4209 }
4210 htab->sdata[0].sym->ref_regular = 1;
4211 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4212 h, rel))
4213 return FALSE;
4214 if (h != NULL)
4215 {
4216 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4217 h->non_got_ref = TRUE;
4218 }
4219 break;
4220
4221 /* Indirect .sdata2 relocation. */
4222 case R_PPC_EMB_SDA2I16:
4223 if (bfd_link_pic (info))
4224 {
4225 bad_shared_reloc (abfd, r_type);
4226 return FALSE;
4227 }
4228 htab->sdata[1].sym->ref_regular = 1;
4229 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4230 h, rel))
4231 return FALSE;
4232 if (h != NULL)
4233 {
4234 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4235 h->non_got_ref = TRUE;
4236 }
4237 break;
4238
4239 case R_PPC_SDAREL16:
4240 htab->sdata[0].sym->ref_regular = 1;
4241 /* Fall through. */
4242
4243 case R_PPC_VLE_SDAREL_LO16A:
4244 case R_PPC_VLE_SDAREL_LO16D:
4245 case R_PPC_VLE_SDAREL_HI16A:
4246 case R_PPC_VLE_SDAREL_HI16D:
4247 case R_PPC_VLE_SDAREL_HA16A:
4248 case R_PPC_VLE_SDAREL_HA16D:
4249 if (h != NULL)
4250 {
4251 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4252 h->non_got_ref = TRUE;
4253 }
4254 break;
4255
4256 case R_PPC_VLE_REL8:
4257 case R_PPC_VLE_REL15:
4258 case R_PPC_VLE_REL24:
4259 case R_PPC_VLE_LO16A:
4260 case R_PPC_VLE_LO16D:
4261 case R_PPC_VLE_HI16A:
4262 case R_PPC_VLE_HI16D:
4263 case R_PPC_VLE_HA16A:
4264 case R_PPC_VLE_HA16D:
4265 break;
4266
4267 case R_PPC_EMB_SDA2REL:
4268 if (bfd_link_pic (info))
4269 {
4270 bad_shared_reloc (abfd, r_type);
4271 return FALSE;
4272 }
4273 htab->sdata[1].sym->ref_regular = 1;
4274 if (h != NULL)
4275 {
4276 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4277 h->non_got_ref = TRUE;
4278 }
4279 break;
4280
4281 case R_PPC_VLE_SDA21_LO:
4282 case R_PPC_VLE_SDA21:
4283 case R_PPC_EMB_SDA21:
4284 case R_PPC_EMB_RELSDA:
4285 if (bfd_link_pic (info))
4286 {
4287 bad_shared_reloc (abfd, r_type);
4288 return FALSE;
4289 }
4290 if (h != NULL)
4291 {
4292 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4293 h->non_got_ref = TRUE;
4294 }
4295 break;
4296
4297 case R_PPC_EMB_NADDR32:
4298 case R_PPC_EMB_NADDR16:
4299 case R_PPC_EMB_NADDR16_LO:
4300 case R_PPC_EMB_NADDR16_HI:
4301 case R_PPC_EMB_NADDR16_HA:
4302 if (bfd_link_pic (info))
4303 {
4304 bad_shared_reloc (abfd, r_type);
4305 return FALSE;
4306 }
4307 if (h != NULL)
4308 h->non_got_ref = TRUE;
4309 break;
4310
4311 case R_PPC_PLTREL24:
4312 if (h == NULL)
4313 break;
4314 /* Fall through */
4315 case R_PPC_PLT32:
4316 case R_PPC_PLTREL32:
4317 case R_PPC_PLT16_LO:
4318 case R_PPC_PLT16_HI:
4319 case R_PPC_PLT16_HA:
4320 #ifdef DEBUG
4321 fprintf (stderr, "Reloc requires a PLT entry\n");
4322 #endif
4323 /* This symbol requires a procedure linkage table entry. */
4324 if (h == NULL)
4325 {
4326 if (ifunc == NULL)
4327 {
4328 /* It does not make sense to have a procedure linkage
4329 table entry for a non-ifunc local symbol. */
4330 info->callbacks->einfo
4331 /* xgettext:c-format */
4332 (_("%P: %H: %s reloc against local symbol\n"),
4333 abfd, sec, rel->r_offset,
4334 ppc_elf_howto_table[r_type]->name);
4335 bfd_set_error (bfd_error_bad_value);
4336 return FALSE;
4337 }
4338 }
4339 else
4340 {
4341 bfd_vma addend = 0;
4342
4343 if (r_type == R_PPC_PLTREL24)
4344 {
4345 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4346 if (bfd_link_pic (info))
4347 addend = rel->r_addend;
4348 }
4349 h->needs_plt = 1;
4350 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4351 return FALSE;
4352 }
4353 break;
4354
4355 /* The following relocations don't need to propagate the
4356 relocation if linking a shared object since they are
4357 section relative. */
4358 case R_PPC_SECTOFF:
4359 case R_PPC_SECTOFF_LO:
4360 case R_PPC_SECTOFF_HI:
4361 case R_PPC_SECTOFF_HA:
4362 case R_PPC_DTPREL16:
4363 case R_PPC_DTPREL16_LO:
4364 case R_PPC_DTPREL16_HI:
4365 case R_PPC_DTPREL16_HA:
4366 case R_PPC_TOC16:
4367 break;
4368
4369 case R_PPC_REL16:
4370 case R_PPC_REL16_LO:
4371 case R_PPC_REL16_HI:
4372 case R_PPC_REL16_HA:
4373 case R_PPC_REL16DX_HA:
4374 ppc_elf_tdata (abfd)->has_rel16 = 1;
4375 break;
4376
4377 /* These are just markers. */
4378 case R_PPC_TLS:
4379 case R_PPC_EMB_MRKREF:
4380 case R_PPC_NONE:
4381 case R_PPC_max:
4382 case R_PPC_RELAX:
4383 case R_PPC_RELAX_PLT:
4384 case R_PPC_RELAX_PLTREL24:
4385 break;
4386
4387 /* These should only appear in dynamic objects. */
4388 case R_PPC_COPY:
4389 case R_PPC_GLOB_DAT:
4390 case R_PPC_JMP_SLOT:
4391 case R_PPC_RELATIVE:
4392 case R_PPC_IRELATIVE:
4393 break;
4394
4395 /* These aren't handled yet. We'll report an error later. */
4396 case R_PPC_ADDR30:
4397 case R_PPC_EMB_RELSEC16:
4398 case R_PPC_EMB_RELST_LO:
4399 case R_PPC_EMB_RELST_HI:
4400 case R_PPC_EMB_RELST_HA:
4401 case R_PPC_EMB_BIT_FLD:
4402 break;
4403
4404 /* This refers only to functions defined in the shared library. */
4405 case R_PPC_LOCAL24PC:
4406 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4407 {
4408 htab->plt_type = PLT_OLD;
4409 htab->old_bfd = abfd;
4410 }
4411 if (h != NULL && h->type == STT_GNU_IFUNC)
4412 {
4413 h->needs_plt = 1;
4414 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4415 return FALSE;
4416 }
4417 break;
4418
4419 /* This relocation describes the C++ object vtable hierarchy.
4420 Reconstruct it for later use during GC. */
4421 case R_PPC_GNU_VTINHERIT:
4422 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4423 return FALSE;
4424 break;
4425
4426 /* This relocation describes which C++ vtable entries are actually
4427 used. Record for later use during GC. */
4428 case R_PPC_GNU_VTENTRY:
4429 BFD_ASSERT (h != NULL);
4430 if (h != NULL
4431 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4432 return FALSE;
4433 break;
4434
4435 /* We shouldn't really be seeing these. */
4436 case R_PPC_TPREL32:
4437 case R_PPC_TPREL16:
4438 case R_PPC_TPREL16_LO:
4439 case R_PPC_TPREL16_HI:
4440 case R_PPC_TPREL16_HA:
4441 if (bfd_link_pic (info))
4442 info->flags |= DF_STATIC_TLS;
4443 goto dodyn;
4444
4445 /* Nor these. */
4446 case R_PPC_DTPMOD32:
4447 case R_PPC_DTPREL32:
4448 goto dodyn;
4449
4450 case R_PPC_REL32:
4451 if (h == NULL
4452 && got2 != NULL
4453 && (sec->flags & SEC_CODE) != 0
4454 && bfd_link_pic (info)
4455 && htab->plt_type == PLT_UNSET)
4456 {
4457 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4458 the start of a function, which assembles to a REL32
4459 reference to .got2. If we detect one of these, then
4460 force the old PLT layout because the linker cannot
4461 reliably deduce the GOT pointer value needed for
4462 PLT call stubs. */
4463 asection *s;
4464 Elf_Internal_Sym *isym;
4465
4466 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4467 abfd, r_symndx);
4468 if (isym == NULL)
4469 return FALSE;
4470
4471 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4472 if (s == got2)
4473 {
4474 htab->plt_type = PLT_OLD;
4475 htab->old_bfd = abfd;
4476 }
4477 }
4478 if (h == NULL || h == htab->elf.hgot)
4479 break;
4480 /* fall through */
4481
4482 case R_PPC_ADDR32:
4483 case R_PPC_ADDR16:
4484 case R_PPC_ADDR16_LO:
4485 case R_PPC_ADDR16_HI:
4486 case R_PPC_ADDR16_HA:
4487 case R_PPC_UADDR32:
4488 case R_PPC_UADDR16:
4489 if (h != NULL && !bfd_link_pic (info))
4490 {
4491 /* We may need a plt entry if the symbol turns out to be
4492 a function defined in a dynamic object. */
4493 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4494 return FALSE;
4495
4496 /* We may need a copy reloc too. */
4497 h->non_got_ref = 1;
4498 h->pointer_equality_needed = 1;
4499 if (r_type == R_PPC_ADDR16_HA)
4500 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4501 if (r_type == R_PPC_ADDR16_LO)
4502 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4503 }
4504 goto dodyn;
4505
4506 case R_PPC_REL24:
4507 case R_PPC_REL14:
4508 case R_PPC_REL14_BRTAKEN:
4509 case R_PPC_REL14_BRNTAKEN:
4510 if (h == NULL)
4511 break;
4512 if (h == htab->elf.hgot)
4513 {
4514 if (htab->plt_type == PLT_UNSET)
4515 {
4516 htab->plt_type = PLT_OLD;
4517 htab->old_bfd = abfd;
4518 }
4519 break;
4520 }
4521 /* fall through */
4522
4523 case R_PPC_ADDR24:
4524 case R_PPC_ADDR14:
4525 case R_PPC_ADDR14_BRTAKEN:
4526 case R_PPC_ADDR14_BRNTAKEN:
4527 if (h != NULL && !bfd_link_pic (info))
4528 {
4529 /* We may need a plt entry if the symbol turns out to be
4530 a function defined in a dynamic object. */
4531 h->needs_plt = 1;
4532 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4533 return FALSE;
4534 break;
4535 }
4536
4537 dodyn:
4538 /* If we are creating a shared library, and this is a reloc
4539 against a global symbol, or a non PC relative reloc
4540 against a local symbol, then we need to copy the reloc
4541 into the shared library. However, if we are linking with
4542 -Bsymbolic, we do not need to copy a reloc against a
4543 global symbol which is defined in an object we are
4544 including in the link (i.e., DEF_REGULAR is set). At
4545 this point we have not seen all the input files, so it is
4546 possible that DEF_REGULAR is not set now but will be set
4547 later (it is never cleared). In case of a weak definition,
4548 DEF_REGULAR may be cleared later by a strong definition in
4549 a shared library. We account for that possibility below by
4550 storing information in the dyn_relocs field of the hash
4551 table entry. A similar situation occurs when creating
4552 shared libraries and symbol visibility changes render the
4553 symbol local.
4554
4555 If on the other hand, we are creating an executable, we
4556 may need to keep relocations for symbols satisfied by a
4557 dynamic library if we manage to avoid copy relocs for the
4558 symbol. */
4559 if ((bfd_link_pic (info)
4560 && (must_be_dyn_reloc (info, r_type)
4561 || (h != NULL
4562 && (!SYMBOLIC_BIND (info, h)
4563 || h->root.type == bfd_link_hash_defweak
4564 || !h->def_regular))))
4565 || (ELIMINATE_COPY_RELOCS
4566 && !bfd_link_pic (info)
4567 && h != NULL
4568 && (h->root.type == bfd_link_hash_defweak
4569 || !h->def_regular)))
4570 {
4571 #ifdef DEBUG
4572 fprintf (stderr,
4573 "ppc_elf_check_relocs needs to "
4574 "create relocation for %s\n",
4575 (h && h->root.root.string
4576 ? h->root.root.string : "<unknown>"));
4577 #endif
4578 if (sreloc == NULL)
4579 {
4580 if (htab->elf.dynobj == NULL)
4581 htab->elf.dynobj = abfd;
4582
4583 sreloc = _bfd_elf_make_dynamic_reloc_section
4584 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4585
4586 if (sreloc == NULL)
4587 return FALSE;
4588 }
4589
4590 /* If this is a global symbol, we count the number of
4591 relocations we need for this symbol. */
4592 if (h != NULL)
4593 {
4594 struct elf_dyn_relocs *p;
4595 struct elf_dyn_relocs **rel_head;
4596
4597 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4598 p = *rel_head;
4599 if (p == NULL || p->sec != sec)
4600 {
4601 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4602 if (p == NULL)
4603 return FALSE;
4604 p->next = *rel_head;
4605 *rel_head = p;
4606 p->sec = sec;
4607 p->count = 0;
4608 p->pc_count = 0;
4609 }
4610 p->count += 1;
4611 if (!must_be_dyn_reloc (info, r_type))
4612 p->pc_count += 1;
4613 }
4614 else
4615 {
4616 /* Track dynamic relocs needed for local syms too.
4617 We really need local syms available to do this
4618 easily. Oh well. */
4619 struct ppc_dyn_relocs *p;
4620 struct ppc_dyn_relocs **rel_head;
4621 bfd_boolean is_ifunc;
4622 asection *s;
4623 void *vpp;
4624 Elf_Internal_Sym *isym;
4625
4626 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4627 abfd, r_symndx);
4628 if (isym == NULL)
4629 return FALSE;
4630
4631 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4632 if (s == NULL)
4633 s = sec;
4634
4635 vpp = &elf_section_data (s)->local_dynrel;
4636 rel_head = (struct ppc_dyn_relocs **) vpp;
4637 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4638 p = *rel_head;
4639 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4640 p = p->next;
4641 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4642 {
4643 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4644 if (p == NULL)
4645 return FALSE;
4646 p->next = *rel_head;
4647 *rel_head = p;
4648 p->sec = sec;
4649 p->ifunc = is_ifunc;
4650 p->count = 0;
4651 }
4652 p->count += 1;
4653 }
4654 }
4655
4656 break;
4657 }
4658 }
4659
4660 return TRUE;
4661 }
4662 \f
4663 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4664 and OBFD, and merge non-conflicting ones. */
4665 void
4666 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4667 {
4668 bfd *obfd = info->output_bfd;
4669 obj_attribute *in_attr, *in_attrs;
4670 obj_attribute *out_attr, *out_attrs;
4671
4672 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4673 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4674
4675 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4676 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4677
4678 if (in_attr->i != out_attr->i)
4679 {
4680 int in_fp = in_attr->i & 3;
4681 int out_fp = out_attr->i & 3;
4682
4683 if (in_fp == 0)
4684 ;
4685 else if (out_fp == 0)
4686 {
4687 out_attr->type = 1;
4688 out_attr->i ^= in_fp;
4689 }
4690 else if (out_fp != 2 && in_fp == 2)
4691 _bfd_error_handler
4692 /* xgettext:c-format */
4693 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4694 else if (out_fp == 2 && in_fp != 2)
4695 _bfd_error_handler
4696 /* xgettext:c-format */
4697 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4698 else if (out_fp == 1 && in_fp == 3)
4699 _bfd_error_handler
4700 /* xgettext:c-format */
4701 (_("Warning: %B uses double-precision hard float, "
4702 "%B uses single-precision hard float"), obfd, ibfd);
4703 else if (out_fp == 3 && in_fp == 1)
4704 _bfd_error_handler
4705 /* xgettext:c-format */
4706 (_("Warning: %B uses double-precision hard float, "
4707 "%B uses single-precision hard float"), ibfd, obfd);
4708
4709 in_fp = in_attr->i & 0xc;
4710 out_fp = out_attr->i & 0xc;
4711 if (in_fp == 0)
4712 ;
4713 else if (out_fp == 0)
4714 {
4715 out_attr->type = 1;
4716 out_attr->i ^= in_fp;
4717 }
4718 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4719 _bfd_error_handler
4720 /* xgettext:c-format */
4721 (_("Warning: %B uses 64-bit long double, "
4722 "%B uses 128-bit long double"), ibfd, obfd);
4723 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4724 _bfd_error_handler
4725 /* xgettext:c-format */
4726 (_("Warning: %B uses 64-bit long double, "
4727 "%B uses 128-bit long double"), obfd, ibfd);
4728 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4729 _bfd_error_handler
4730 /* xgettext:c-format */
4731 (_("Warning: %B uses IBM long double, "
4732 "%B uses IEEE long double"), ibfd, obfd);
4733 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4734 _bfd_error_handler
4735 /* xgettext:c-format */
4736 (_("Warning: %B uses IBM long double, "
4737 "%B uses IEEE long double"), obfd, ibfd);
4738 }
4739 }
4740
4741 /* Merge object attributes from IBFD into OBFD. Warn if
4742 there are conflicting attributes. */
4743 static bfd_boolean
4744 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4745 {
4746 bfd *obfd;
4747 obj_attribute *in_attr, *in_attrs;
4748 obj_attribute *out_attr, *out_attrs;
4749
4750 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4751
4752 obfd = info->output_bfd;
4753 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4754 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4755
4756 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4757 merge non-conflicting ones. */
4758 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4759 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4760 if (in_attr->i != out_attr->i)
4761 {
4762 int in_vec = in_attr->i & 3;
4763 int out_vec = out_attr->i & 3;
4764
4765 if (in_vec == 0)
4766 ;
4767 else if (out_vec == 0)
4768 {
4769 out_attr->type = 1;
4770 out_attr->i = in_vec;
4771 }
4772 /* For now, allow generic to transition to AltiVec or SPE
4773 without a warning. If GCC marked files with their stack
4774 alignment and used don't-care markings for files which are
4775 not affected by the vector ABI, we could warn about this
4776 case too. */
4777 else if (in_vec == 1)
4778 ;
4779 else if (out_vec == 1)
4780 {
4781 out_attr->type = 1;
4782 out_attr->i = in_vec;
4783 }
4784 else if (out_vec < in_vec)
4785 _bfd_error_handler
4786 /* xgettext:c-format */
4787 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4788 obfd, ibfd);
4789 else if (out_vec > in_vec)
4790 _bfd_error_handler
4791 /* xgettext:c-format */
4792 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4793 ibfd, obfd);
4794 }
4795
4796 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4797 and merge non-conflicting ones. */
4798 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4799 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4800 if (in_attr->i != out_attr->i)
4801 {
4802 int in_struct = in_attr->i & 3;
4803 int out_struct = out_attr->i & 3;
4804
4805 if (in_struct == 0 || in_struct == 3)
4806 ;
4807 else if (out_struct == 0)
4808 {
4809 out_attr->type = 1;
4810 out_attr->i = in_struct;
4811 }
4812 else if (out_struct < in_struct)
4813 _bfd_error_handler
4814 /* xgettext:c-format */
4815 (_("Warning: %B uses r3/r4 for small structure returns, "
4816 "%B uses memory"), obfd, ibfd);
4817 else if (out_struct > in_struct)
4818 _bfd_error_handler
4819 /* xgettext:c-format */
4820 (_("Warning: %B uses r3/r4 for small structure returns, "
4821 "%B uses memory"), ibfd, obfd);
4822 }
4823
4824 /* Merge Tag_compatibility attributes and any common GNU ones. */
4825 _bfd_elf_merge_object_attributes (ibfd, info);
4826
4827 return TRUE;
4828 }
4829
4830 /* Merge backend specific data from an object file to the output
4831 object file when linking. */
4832
4833 static bfd_boolean
4834 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4835 {
4836 bfd *obfd = info->output_bfd;
4837 flagword old_flags;
4838 flagword new_flags;
4839 bfd_boolean error;
4840
4841 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4842 return TRUE;
4843
4844 /* Check if we have the same endianness. */
4845 if (! _bfd_generic_verify_endian_match (ibfd, info))
4846 return FALSE;
4847
4848 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4849 return FALSE;
4850
4851 new_flags = elf_elfheader (ibfd)->e_flags;
4852 old_flags = elf_elfheader (obfd)->e_flags;
4853 if (!elf_flags_init (obfd))
4854 {
4855 /* First call, no flags set. */
4856 elf_flags_init (obfd) = TRUE;
4857 elf_elfheader (obfd)->e_flags = new_flags;
4858 }
4859
4860 /* Compatible flags are ok. */
4861 else if (new_flags == old_flags)
4862 ;
4863
4864 /* Incompatible flags. */
4865 else
4866 {
4867 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4868 to be linked with either. */
4869 error = FALSE;
4870 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4871 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4872 {
4873 error = TRUE;
4874 _bfd_error_handler
4875 (_("%B: compiled with -mrelocatable and linked with "
4876 "modules compiled normally"), ibfd);
4877 }
4878 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4879 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4880 {
4881 error = TRUE;
4882 _bfd_error_handler
4883 (_("%B: compiled normally and linked with "
4884 "modules compiled with -mrelocatable"), ibfd);
4885 }
4886
4887 /* The output is -mrelocatable-lib iff both the input files are. */
4888 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4889 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4890
4891 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4892 but each input file is either -mrelocatable or -mrelocatable-lib. */
4893 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4894 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4895 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4896 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4897
4898 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4899 any module uses it. */
4900 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4901
4902 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4903 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4904
4905 /* Warn about any other mismatches. */
4906 if (new_flags != old_flags)
4907 {
4908 error = TRUE;
4909 _bfd_error_handler
4910 /* xgettext:c-format */
4911 (_("%B: uses different e_flags (0x%lx) fields "
4912 "than previous modules (0x%lx)"),
4913 ibfd, (long) new_flags, (long) old_flags);
4914 }
4915
4916 if (error)
4917 {
4918 bfd_set_error (bfd_error_bad_value);
4919 return FALSE;
4920 }
4921 }
4922
4923 return TRUE;
4924 }
4925
4926 static void
4927 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4928 bfd_vma value,
4929 split16_format_type split16_format)
4930
4931 {
4932 unsigned int insn, top5;
4933
4934 insn = bfd_get_32 (output_bfd, loc);
4935 top5 = value & 0xf800;
4936 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4937 insn &= (split16_format == split16a_type ? ~0x1f007ff : ~0x1f07ff);
4938 insn |= top5;
4939 insn |= value & 0x7ff;
4940 bfd_put_32 (output_bfd, insn, loc);
4941 }
4942
4943 \f
4944 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4945 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4946 int
4947 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4948 struct bfd_link_info *info)
4949 {
4950 struct ppc_elf_link_hash_table *htab;
4951 flagword flags;
4952
4953 htab = ppc_elf_hash_table (info);
4954
4955 if (htab->plt_type == PLT_UNSET)
4956 {
4957 struct elf_link_hash_entry *h;
4958
4959 if (htab->params->plt_style == PLT_OLD)
4960 htab->plt_type = PLT_OLD;
4961 else if (bfd_link_pic (info)
4962 && htab->elf.dynamic_sections_created
4963 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4964 FALSE, FALSE, TRUE)) != NULL
4965 && (h->type == STT_FUNC
4966 || h->needs_plt)
4967 && h->ref_regular
4968 && !(SYMBOL_CALLS_LOCAL (info, h)
4969 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4970 && h->root.type == bfd_link_hash_undefweak)))
4971 {
4972 /* Profiling of shared libs (and pies) is not supported with
4973 secure plt, because ppc32 does profiling before a
4974 function prologue and a secure plt pic call stubs needs
4975 r30 to be set up. */
4976 htab->plt_type = PLT_OLD;
4977 }
4978 else
4979 {
4980 bfd *ibfd;
4981 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4982
4983 /* Look through the reloc flags left by ppc_elf_check_relocs.
4984 Use the old style bss plt if a file makes plt calls
4985 without using the new relocs, and if ld isn't given
4986 --secure-plt and we never see REL16 relocs. */
4987 if (plt_type == PLT_UNSET)
4988 plt_type = PLT_OLD;
4989 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4990 if (is_ppc_elf (ibfd))
4991 {
4992 if (ppc_elf_tdata (ibfd)->has_rel16)
4993 plt_type = PLT_NEW;
4994 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4995 {
4996 plt_type = PLT_OLD;
4997 htab->old_bfd = ibfd;
4998 break;
4999 }
5000 }
5001 htab->plt_type = plt_type;
5002 }
5003 }
5004 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5005 {
5006 if (htab->old_bfd != NULL)
5007 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5008 htab->old_bfd);
5009 else
5010 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5011 }
5012
5013 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5014
5015 if (htab->plt_type == PLT_NEW)
5016 {
5017 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5018 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5019
5020 /* The new PLT is a loaded section. */
5021 if (htab->plt != NULL
5022 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
5023 return -1;
5024
5025 /* The new GOT is not executable. */
5026 if (htab->got != NULL
5027 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
5028 return -1;
5029 }
5030 else
5031 {
5032 /* Stop an unused .glink section from affecting .text alignment. */
5033 if (htab->glink != NULL
5034 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5035 return -1;
5036 }
5037 return htab->plt_type == PLT_NEW;
5038 }
5039 \f
5040 /* Return the section that should be marked against GC for a given
5041 relocation. */
5042
5043 static asection *
5044 ppc_elf_gc_mark_hook (asection *sec,
5045 struct bfd_link_info *info,
5046 Elf_Internal_Rela *rel,
5047 struct elf_link_hash_entry *h,
5048 Elf_Internal_Sym *sym)
5049 {
5050 if (h != NULL)
5051 switch (ELF32_R_TYPE (rel->r_info))
5052 {
5053 case R_PPC_GNU_VTINHERIT:
5054 case R_PPC_GNU_VTENTRY:
5055 return NULL;
5056 }
5057
5058 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5059 }
5060
5061 /* Update the got, plt and dynamic reloc reference counts for the
5062 section being removed. */
5063
5064 static bfd_boolean
5065 ppc_elf_gc_sweep_hook (bfd *abfd,
5066 struct bfd_link_info *info,
5067 asection *sec,
5068 const Elf_Internal_Rela *relocs)
5069 {
5070 struct ppc_elf_link_hash_table *htab;
5071 Elf_Internal_Shdr *symtab_hdr;
5072 struct elf_link_hash_entry **sym_hashes;
5073 bfd_signed_vma *local_got_refcounts;
5074 const Elf_Internal_Rela *rel, *relend;
5075 asection *got2;
5076
5077 if (bfd_link_relocatable (info))
5078 return TRUE;
5079
5080 if ((sec->flags & SEC_ALLOC) == 0)
5081 return TRUE;
5082
5083 elf_section_data (sec)->local_dynrel = NULL;
5084
5085 htab = ppc_elf_hash_table (info);
5086 symtab_hdr = &elf_symtab_hdr (abfd);
5087 sym_hashes = elf_sym_hashes (abfd);
5088 local_got_refcounts = elf_local_got_refcounts (abfd);
5089 got2 = bfd_get_section_by_name (abfd, ".got2");
5090
5091 relend = relocs + sec->reloc_count;
5092 for (rel = relocs; rel < relend; rel++)
5093 {
5094 unsigned long r_symndx;
5095 enum elf_ppc_reloc_type r_type;
5096 struct elf_link_hash_entry *h = NULL;
5097
5098 r_symndx = ELF32_R_SYM (rel->r_info);
5099 if (r_symndx >= symtab_hdr->sh_info)
5100 {
5101 struct elf_dyn_relocs **pp, *p;
5102 struct ppc_elf_link_hash_entry *eh;
5103
5104 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5105 while (h->root.type == bfd_link_hash_indirect
5106 || h->root.type == bfd_link_hash_warning)
5107 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5108 eh = (struct ppc_elf_link_hash_entry *) h;
5109
5110 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5111 if (p->sec == sec)
5112 {
5113 /* Everything must go for SEC. */
5114 *pp = p->next;
5115 break;
5116 }
5117 }
5118
5119 r_type = ELF32_R_TYPE (rel->r_info);
5120 if (!htab->is_vxworks
5121 && h == NULL
5122 && local_got_refcounts != NULL
5123 && (!bfd_link_pic (info)
5124 || is_branch_reloc (r_type)))
5125 {
5126 struct plt_entry **local_plt = (struct plt_entry **)
5127 (local_got_refcounts + symtab_hdr->sh_info);
5128 char *local_got_tls_masks = (char *)
5129 (local_plt + symtab_hdr->sh_info);
5130 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5131 {
5132 struct plt_entry **ifunc = local_plt + r_symndx;
5133 bfd_vma addend = 0;
5134 struct plt_entry *ent;
5135
5136 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5137 addend = rel->r_addend;
5138 ent = find_plt_ent (ifunc, got2, addend);
5139 if (ent->plt.refcount > 0)
5140 ent->plt.refcount -= 1;
5141 continue;
5142 }
5143 }
5144
5145 switch (r_type)
5146 {
5147 case R_PPC_GOT_TLSLD16:
5148 case R_PPC_GOT_TLSLD16_LO:
5149 case R_PPC_GOT_TLSLD16_HI:
5150 case R_PPC_GOT_TLSLD16_HA:
5151 case R_PPC_GOT_TLSGD16:
5152 case R_PPC_GOT_TLSGD16_LO:
5153 case R_PPC_GOT_TLSGD16_HI:
5154 case R_PPC_GOT_TLSGD16_HA:
5155 case R_PPC_GOT_TPREL16:
5156 case R_PPC_GOT_TPREL16_LO:
5157 case R_PPC_GOT_TPREL16_HI:
5158 case R_PPC_GOT_TPREL16_HA:
5159 case R_PPC_GOT_DTPREL16:
5160 case R_PPC_GOT_DTPREL16_LO:
5161 case R_PPC_GOT_DTPREL16_HI:
5162 case R_PPC_GOT_DTPREL16_HA:
5163 case R_PPC_GOT16:
5164 case R_PPC_GOT16_LO:
5165 case R_PPC_GOT16_HI:
5166 case R_PPC_GOT16_HA:
5167 if (h != NULL)
5168 {
5169 if (h->got.refcount > 0)
5170 h->got.refcount--;
5171 if (!bfd_link_pic (info))
5172 {
5173 struct plt_entry *ent;
5174
5175 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5176 if (ent != NULL && ent->plt.refcount > 0)
5177 ent->plt.refcount -= 1;
5178 }
5179 }
5180 else if (local_got_refcounts != NULL)
5181 {
5182 if (local_got_refcounts[r_symndx] > 0)
5183 local_got_refcounts[r_symndx]--;
5184 }
5185 break;
5186
5187 case R_PPC_REL24:
5188 case R_PPC_REL14:
5189 case R_PPC_REL14_BRTAKEN:
5190 case R_PPC_REL14_BRNTAKEN:
5191 case R_PPC_REL32:
5192 if (h == NULL || h == htab->elf.hgot)
5193 break;
5194 /* Fall through. */
5195
5196 case R_PPC_ADDR32:
5197 case R_PPC_ADDR24:
5198 case R_PPC_ADDR16:
5199 case R_PPC_ADDR16_LO:
5200 case R_PPC_ADDR16_HI:
5201 case R_PPC_ADDR16_HA:
5202 case R_PPC_ADDR14:
5203 case R_PPC_ADDR14_BRTAKEN:
5204 case R_PPC_ADDR14_BRNTAKEN:
5205 case R_PPC_UADDR32:
5206 case R_PPC_UADDR16:
5207 if (bfd_link_pic (info))
5208 break;
5209 /* Fall through. */
5210
5211 case R_PPC_PLT32:
5212 case R_PPC_PLTREL24:
5213 case R_PPC_PLTREL32:
5214 case R_PPC_PLT16_LO:
5215 case R_PPC_PLT16_HI:
5216 case R_PPC_PLT16_HA:
5217 if (h != NULL)
5218 {
5219 bfd_vma addend = 0;
5220 struct plt_entry *ent;
5221
5222 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5223 addend = rel->r_addend;
5224 ent = find_plt_ent (&h->plt.plist, got2, addend);
5225 if (ent != NULL && ent->plt.refcount > 0)
5226 ent->plt.refcount -= 1;
5227 }
5228 break;
5229
5230 default:
5231 break;
5232 }
5233 }
5234 return TRUE;
5235 }
5236 \f
5237 /* Set plt output section type, htab->tls_get_addr, and call the
5238 generic ELF tls_setup function. */
5239
5240 asection *
5241 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5242 {
5243 struct ppc_elf_link_hash_table *htab;
5244
5245 htab = ppc_elf_hash_table (info);
5246 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5247 FALSE, FALSE, TRUE);
5248 if (htab->plt_type != PLT_NEW)
5249 htab->params->no_tls_get_addr_opt = TRUE;
5250
5251 if (!htab->params->no_tls_get_addr_opt)
5252 {
5253 struct elf_link_hash_entry *opt, *tga;
5254 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5255 FALSE, FALSE, TRUE);
5256 if (opt != NULL
5257 && (opt->root.type == bfd_link_hash_defined
5258 || opt->root.type == bfd_link_hash_defweak))
5259 {
5260 /* If glibc supports an optimized __tls_get_addr call stub,
5261 signalled by the presence of __tls_get_addr_opt, and we'll
5262 be calling __tls_get_addr via a plt call stub, then
5263 make __tls_get_addr point to __tls_get_addr_opt. */
5264 tga = htab->tls_get_addr;
5265 if (htab->elf.dynamic_sections_created
5266 && tga != NULL
5267 && (tga->type == STT_FUNC
5268 || tga->needs_plt)
5269 && !(SYMBOL_CALLS_LOCAL (info, tga)
5270 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5271 && tga->root.type == bfd_link_hash_undefweak)))
5272 {
5273 struct plt_entry *ent;
5274 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5275 if (ent->plt.refcount > 0)
5276 break;
5277 if (ent != NULL)
5278 {
5279 tga->root.type = bfd_link_hash_indirect;
5280 tga->root.u.i.link = &opt->root;
5281 ppc_elf_copy_indirect_symbol (info, opt, tga);
5282 opt->forced_local = 0;
5283 if (opt->dynindx != -1)
5284 {
5285 /* Use __tls_get_addr_opt in dynamic relocations. */
5286 opt->dynindx = -1;
5287 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5288 opt->dynstr_index);
5289 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5290 return FALSE;
5291 }
5292 htab->tls_get_addr = opt;
5293 }
5294 }
5295 }
5296 else
5297 htab->params->no_tls_get_addr_opt = TRUE;
5298 }
5299 if (htab->plt_type == PLT_NEW
5300 && htab->plt != NULL
5301 && htab->plt->output_section != NULL)
5302 {
5303 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5304 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5305 }
5306
5307 return _bfd_elf_tls_setup (obfd, info);
5308 }
5309
5310 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5311 HASH. */
5312
5313 static bfd_boolean
5314 branch_reloc_hash_match (const bfd *ibfd,
5315 const Elf_Internal_Rela *rel,
5316 const struct elf_link_hash_entry *hash)
5317 {
5318 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5319 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5320 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5321
5322 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5323 {
5324 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5325 struct elf_link_hash_entry *h;
5326
5327 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5328 while (h->root.type == bfd_link_hash_indirect
5329 || h->root.type == bfd_link_hash_warning)
5330 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5331 if (h == hash)
5332 return TRUE;
5333 }
5334 return FALSE;
5335 }
5336
5337 /* Run through all the TLS relocs looking for optimization
5338 opportunities. */
5339
5340 bfd_boolean
5341 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5342 struct bfd_link_info *info)
5343 {
5344 bfd *ibfd;
5345 asection *sec;
5346 struct ppc_elf_link_hash_table *htab;
5347 int pass;
5348
5349 if (!bfd_link_executable (info))
5350 return TRUE;
5351
5352 htab = ppc_elf_hash_table (info);
5353 if (htab == NULL)
5354 return FALSE;
5355
5356 /* Make two passes through the relocs. First time check that tls
5357 relocs involved in setting up a tls_get_addr call are indeed
5358 followed by such a call. If they are not, don't do any tls
5359 optimization. On the second pass twiddle tls_mask flags to
5360 notify relocate_section that optimization can be done, and
5361 adjust got and plt refcounts. */
5362 for (pass = 0; pass < 2; ++pass)
5363 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5364 {
5365 Elf_Internal_Sym *locsyms = NULL;
5366 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5367 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5368
5369 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5370 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5371 {
5372 Elf_Internal_Rela *relstart, *rel, *relend;
5373 int expecting_tls_get_addr = 0;
5374
5375 /* Read the relocations. */
5376 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5377 info->keep_memory);
5378 if (relstart == NULL)
5379 return FALSE;
5380
5381 relend = relstart + sec->reloc_count;
5382 for (rel = relstart; rel < relend; rel++)
5383 {
5384 enum elf_ppc_reloc_type r_type;
5385 unsigned long r_symndx;
5386 struct elf_link_hash_entry *h = NULL;
5387 char *tls_mask;
5388 char tls_set, tls_clear;
5389 bfd_boolean is_local;
5390 bfd_signed_vma *got_count;
5391
5392 r_symndx = ELF32_R_SYM (rel->r_info);
5393 if (r_symndx >= symtab_hdr->sh_info)
5394 {
5395 struct elf_link_hash_entry **sym_hashes;
5396
5397 sym_hashes = elf_sym_hashes (ibfd);
5398 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5399 while (h->root.type == bfd_link_hash_indirect
5400 || h->root.type == bfd_link_hash_warning)
5401 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5402 }
5403
5404 is_local = FALSE;
5405 if (h == NULL
5406 || !h->def_dynamic)
5407 is_local = TRUE;
5408
5409 r_type = ELF32_R_TYPE (rel->r_info);
5410 /* If this section has old-style __tls_get_addr calls
5411 without marker relocs, then check that each
5412 __tls_get_addr call reloc is preceded by a reloc
5413 that conceivably belongs to the __tls_get_addr arg
5414 setup insn. If we don't find matching arg setup
5415 relocs, don't do any tls optimization. */
5416 if (pass == 0
5417 && sec->has_tls_get_addr_call
5418 && h != NULL
5419 && h == htab->tls_get_addr
5420 && !expecting_tls_get_addr
5421 && is_branch_reloc (r_type))
5422 {
5423 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5424 "TLS optimization disabled\n",
5425 ibfd, sec, rel->r_offset);
5426 if (elf_section_data (sec)->relocs != relstart)
5427 free (relstart);
5428 return TRUE;
5429 }
5430
5431 expecting_tls_get_addr = 0;
5432 switch (r_type)
5433 {
5434 case R_PPC_GOT_TLSLD16:
5435 case R_PPC_GOT_TLSLD16_LO:
5436 expecting_tls_get_addr = 1;
5437 /* Fall through. */
5438
5439 case R_PPC_GOT_TLSLD16_HI:
5440 case R_PPC_GOT_TLSLD16_HA:
5441 /* These relocs should never be against a symbol
5442 defined in a shared lib. Leave them alone if
5443 that turns out to be the case. */
5444 if (!is_local)
5445 continue;
5446
5447 /* LD -> LE */
5448 tls_set = 0;
5449 tls_clear = TLS_LD;
5450 break;
5451
5452 case R_PPC_GOT_TLSGD16:
5453 case R_PPC_GOT_TLSGD16_LO:
5454 expecting_tls_get_addr = 1;
5455 /* Fall through. */
5456
5457 case R_PPC_GOT_TLSGD16_HI:
5458 case R_PPC_GOT_TLSGD16_HA:
5459 if (is_local)
5460 /* GD -> LE */
5461 tls_set = 0;
5462 else
5463 /* GD -> IE */
5464 tls_set = TLS_TLS | TLS_TPRELGD;
5465 tls_clear = TLS_GD;
5466 break;
5467
5468 case R_PPC_GOT_TPREL16:
5469 case R_PPC_GOT_TPREL16_LO:
5470 case R_PPC_GOT_TPREL16_HI:
5471 case R_PPC_GOT_TPREL16_HA:
5472 if (is_local)
5473 {
5474 /* IE -> LE */
5475 tls_set = 0;
5476 tls_clear = TLS_TPREL;
5477 break;
5478 }
5479 else
5480 continue;
5481
5482 case R_PPC_TLSGD:
5483 case R_PPC_TLSLD:
5484 expecting_tls_get_addr = 2;
5485 tls_set = 0;
5486 tls_clear = 0;
5487 break;
5488
5489 default:
5490 continue;
5491 }
5492
5493 if (pass == 0)
5494 {
5495 if (!expecting_tls_get_addr
5496 || (expecting_tls_get_addr == 1
5497 && !sec->has_tls_get_addr_call))
5498 continue;
5499
5500 if (rel + 1 < relend
5501 && branch_reloc_hash_match (ibfd, rel + 1,
5502 htab->tls_get_addr))
5503 continue;
5504
5505 /* Uh oh, we didn't find the expected call. We
5506 could just mark this symbol to exclude it
5507 from tls optimization but it's safer to skip
5508 the entire optimization. */
5509 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5510 "TLS optimization disabled\n"),
5511 ibfd, sec, rel->r_offset);
5512 if (elf_section_data (sec)->relocs != relstart)
5513 free (relstart);
5514 return TRUE;
5515 }
5516
5517 if (expecting_tls_get_addr)
5518 {
5519 struct plt_entry *ent;
5520 bfd_vma addend = 0;
5521
5522 if (bfd_link_pic (info)
5523 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5524 addend = rel[1].r_addend;
5525 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5526 got2, addend);
5527 if (ent != NULL && ent->plt.refcount > 0)
5528 ent->plt.refcount -= 1;
5529
5530 if (expecting_tls_get_addr == 2)
5531 continue;
5532 }
5533
5534 if (h != NULL)
5535 {
5536 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5537 got_count = &h->got.refcount;
5538 }
5539 else
5540 {
5541 bfd_signed_vma *lgot_refs;
5542 struct plt_entry **local_plt;
5543 char *lgot_masks;
5544
5545 if (locsyms == NULL)
5546 {
5547 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5548 if (locsyms == NULL)
5549 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5550 symtab_hdr->sh_info,
5551 0, NULL, NULL, NULL);
5552 if (locsyms == NULL)
5553 {
5554 if (elf_section_data (sec)->relocs != relstart)
5555 free (relstart);
5556 return FALSE;
5557 }
5558 }
5559 lgot_refs = elf_local_got_refcounts (ibfd);
5560 if (lgot_refs == NULL)
5561 abort ();
5562 local_plt = (struct plt_entry **)
5563 (lgot_refs + symtab_hdr->sh_info);
5564 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5565 tls_mask = &lgot_masks[r_symndx];
5566 got_count = &lgot_refs[r_symndx];
5567 }
5568
5569 if (tls_set == 0)
5570 {
5571 /* We managed to get rid of a got entry. */
5572 if (*got_count > 0)
5573 *got_count -= 1;
5574 }
5575
5576 *tls_mask |= tls_set;
5577 *tls_mask &= ~tls_clear;
5578 }
5579
5580 if (elf_section_data (sec)->relocs != relstart)
5581 free (relstart);
5582 }
5583
5584 if (locsyms != NULL
5585 && (symtab_hdr->contents != (unsigned char *) locsyms))
5586 {
5587 if (!info->keep_memory)
5588 free (locsyms);
5589 else
5590 symtab_hdr->contents = (unsigned char *) locsyms;
5591 }
5592 }
5593 return TRUE;
5594 }
5595 \f
5596 /* Return true if we have dynamic relocs that apply to read-only sections. */
5597
5598 static bfd_boolean
5599 readonly_dynrelocs (struct elf_link_hash_entry *h)
5600 {
5601 struct elf_dyn_relocs *p;
5602
5603 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5604 {
5605 asection *s = p->sec->output_section;
5606
5607 if (s != NULL
5608 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5609 == (SEC_READONLY | SEC_ALLOC)))
5610 return TRUE;
5611 }
5612 return FALSE;
5613 }
5614
5615 /* Adjust a symbol defined by a dynamic object and referenced by a
5616 regular object. The current definition is in some section of the
5617 dynamic object, but we're not including those sections. We have to
5618 change the definition to something the rest of the link can
5619 understand. */
5620
5621 static bfd_boolean
5622 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5623 struct elf_link_hash_entry *h)
5624 {
5625 struct ppc_elf_link_hash_table *htab;
5626 asection *s;
5627
5628 #ifdef DEBUG
5629 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5630 h->root.root.string);
5631 #endif
5632
5633 /* Make sure we know what is going on here. */
5634 htab = ppc_elf_hash_table (info);
5635 BFD_ASSERT (htab->elf.dynobj != NULL
5636 && (h->needs_plt
5637 || h->type == STT_GNU_IFUNC
5638 || h->u.weakdef != NULL
5639 || (h->def_dynamic
5640 && h->ref_regular
5641 && !h->def_regular)));
5642
5643 /* Deal with function syms. */
5644 if (h->type == STT_FUNC
5645 || h->type == STT_GNU_IFUNC
5646 || h->needs_plt)
5647 {
5648 /* Clear procedure linkage table information for any symbol that
5649 won't need a .plt entry. */
5650 struct plt_entry *ent;
5651 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5652 if (ent->plt.refcount > 0)
5653 break;
5654 if (ent == NULL
5655 || (h->type != STT_GNU_IFUNC
5656 && (SYMBOL_CALLS_LOCAL (info, h)
5657 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5658 && h->root.type == bfd_link_hash_undefweak))))
5659 {
5660 /* A PLT entry is not required/allowed when:
5661
5662 1. We are not using ld.so; because then the PLT entry
5663 can't be set up, so we can't use one. In this case,
5664 ppc_elf_adjust_dynamic_symbol won't even be called.
5665
5666 2. GC has rendered the entry unused.
5667
5668 3. We know for certain that a call to this symbol
5669 will go to this object, or will remain undefined. */
5670 h->plt.plist = NULL;
5671 h->needs_plt = 0;
5672 h->pointer_equality_needed = 0;
5673 }
5674 else
5675 {
5676 /* Taking a function's address in a read/write section
5677 doesn't require us to define the function symbol in the
5678 executable on a plt call stub. A dynamic reloc can
5679 be used instead. */
5680 if (h->pointer_equality_needed
5681 && h->type != STT_GNU_IFUNC
5682 && !htab->is_vxworks
5683 && !ppc_elf_hash_entry (h)->has_sda_refs
5684 && !readonly_dynrelocs (h))
5685 {
5686 h->pointer_equality_needed = 0;
5687 h->non_got_ref = 0;
5688 }
5689
5690 /* After adjust_dynamic_symbol, non_got_ref set in the
5691 non-shared case means that we have allocated space in
5692 .dynbss for the symbol and thus dyn_relocs for this
5693 symbol should be discarded.
5694 If we get here we know we are making a PLT entry for this
5695 symbol, and in an executable we'd normally resolve
5696 relocations against this symbol to the PLT entry. Allow
5697 dynamic relocs if the reference is weak, and the dynamic
5698 relocs will not cause text relocation. */
5699 else if (!h->ref_regular_nonweak
5700 && h->non_got_ref
5701 && h->type != STT_GNU_IFUNC
5702 && !htab->is_vxworks
5703 && !ppc_elf_hash_entry (h)->has_sda_refs
5704 && !readonly_dynrelocs (h))
5705 h->non_got_ref = 0;
5706 }
5707 h->protected_def = 0;
5708 return TRUE;
5709 }
5710 else
5711 h->plt.plist = NULL;
5712
5713 /* If this is a weak symbol, and there is a real definition, the
5714 processor independent code will have arranged for us to see the
5715 real definition first, and we can just use the same value. */
5716 if (h->u.weakdef != NULL)
5717 {
5718 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5719 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5720 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5721 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5722 if (ELIMINATE_COPY_RELOCS)
5723 h->non_got_ref = h->u.weakdef->non_got_ref;
5724 return TRUE;
5725 }
5726
5727 /* This is a reference to a symbol defined by a dynamic object which
5728 is not a function. */
5729
5730 /* If we are creating a shared library, we must presume that the
5731 only references to the symbol are via the global offset table.
5732 For such cases we need not do anything here; the relocations will
5733 be handled correctly by relocate_section. */
5734 if (bfd_link_pic (info))
5735 {
5736 h->protected_def = 0;
5737 return TRUE;
5738 }
5739
5740 /* If there are no references to this symbol that do not use the
5741 GOT, we don't need to generate a copy reloc. */
5742 if (!h->non_got_ref)
5743 {
5744 h->protected_def = 0;
5745 return TRUE;
5746 }
5747
5748 /* Protected variables do not work with .dynbss. The copy in
5749 .dynbss won't be used by the shared library with the protected
5750 definition for the variable. Editing to PIC, or text relocations
5751 are preferable to an incorrect program. */
5752 if (h->protected_def)
5753 {
5754 if (ELIMINATE_COPY_RELOCS
5755 && ppc_elf_hash_entry (h)->has_addr16_ha
5756 && ppc_elf_hash_entry (h)->has_addr16_lo
5757 && htab->params->pic_fixup == 0
5758 && info->disable_target_specific_optimizations <= 1)
5759 htab->params->pic_fixup = 1;
5760 h->non_got_ref = 0;
5761 return TRUE;
5762 }
5763
5764 /* If -z nocopyreloc was given, we won't generate them either. */
5765 if (info->nocopyreloc)
5766 {
5767 h->non_got_ref = 0;
5768 return TRUE;
5769 }
5770
5771 /* If we didn't find any dynamic relocs in read-only sections, then
5772 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5773 We can't do this if there are any small data relocations. This
5774 doesn't work on VxWorks, where we can not have dynamic
5775 relocations (other than copy and jump slot relocations) in an
5776 executable. */
5777 if (ELIMINATE_COPY_RELOCS
5778 && !ppc_elf_hash_entry (h)->has_sda_refs
5779 && !htab->is_vxworks
5780 && !h->def_regular
5781 && !readonly_dynrelocs (h))
5782 {
5783 h->non_got_ref = 0;
5784 return TRUE;
5785 }
5786
5787 /* We must allocate the symbol in our .dynbss section, which will
5788 become part of the .bss section of the executable. There will be
5789 an entry for this symbol in the .dynsym section. The dynamic
5790 object will contain position independent code, so all references
5791 from the dynamic object to this symbol will go through the global
5792 offset table. The dynamic linker will use the .dynsym entry to
5793 determine the address it must put in the global offset table, so
5794 both the dynamic object and the regular object will refer to the
5795 same memory location for the variable.
5796
5797 Of course, if the symbol is referenced using SDAREL relocs, we
5798 must instead allocate it in .sbss. */
5799
5800 if (ppc_elf_hash_entry (h)->has_sda_refs)
5801 s = htab->dynsbss;
5802 else
5803 s = htab->dynbss;
5804 BFD_ASSERT (s != NULL);
5805
5806 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5807 copy the initial value out of the dynamic object and into the
5808 runtime process image. We need to remember the offset into the
5809 .rela.bss section we are going to use. */
5810 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5811 {
5812 asection *srel;
5813
5814 if (ppc_elf_hash_entry (h)->has_sda_refs)
5815 srel = htab->relsbss;
5816 else
5817 srel = htab->relbss;
5818 BFD_ASSERT (srel != NULL);
5819 srel->size += sizeof (Elf32_External_Rela);
5820 h->needs_copy = 1;
5821 }
5822
5823 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5824 }
5825 \f
5826 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5827 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5828 specifying the addend on the plt relocation. For -fpic code, the sym
5829 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5830 xxxxxxxx.got2.plt_pic32.<callee>. */
5831
5832 static bfd_boolean
5833 add_stub_sym (struct plt_entry *ent,
5834 struct elf_link_hash_entry *h,
5835 struct bfd_link_info *info)
5836 {
5837 struct elf_link_hash_entry *sh;
5838 size_t len1, len2, len3;
5839 char *name;
5840 const char *stub;
5841 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5842
5843 if (bfd_link_pic (info))
5844 stub = ".plt_pic32.";
5845 else
5846 stub = ".plt_call32.";
5847
5848 len1 = strlen (h->root.root.string);
5849 len2 = strlen (stub);
5850 len3 = 0;
5851 if (ent->sec)
5852 len3 = strlen (ent->sec->name);
5853 name = bfd_malloc (len1 + len2 + len3 + 9);
5854 if (name == NULL)
5855 return FALSE;
5856 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5857 if (ent->sec)
5858 memcpy (name + 8, ent->sec->name, len3);
5859 memcpy (name + 8 + len3, stub, len2);
5860 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5861 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5862 if (sh == NULL)
5863 return FALSE;
5864 if (sh->root.type == bfd_link_hash_new)
5865 {
5866 sh->root.type = bfd_link_hash_defined;
5867 sh->root.u.def.section = htab->glink;
5868 sh->root.u.def.value = ent->glink_offset;
5869 sh->ref_regular = 1;
5870 sh->def_regular = 1;
5871 sh->ref_regular_nonweak = 1;
5872 sh->forced_local = 1;
5873 sh->non_elf = 0;
5874 sh->root.linker_def = 1;
5875 }
5876 return TRUE;
5877 }
5878
5879 /* Allocate NEED contiguous space in .got, and return the offset.
5880 Handles allocation of the got header when crossing 32k. */
5881
5882 static bfd_vma
5883 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5884 {
5885 bfd_vma where;
5886 unsigned int max_before_header;
5887
5888 if (htab->plt_type == PLT_VXWORKS)
5889 {
5890 where = htab->got->size;
5891 htab->got->size += need;
5892 }
5893 else
5894 {
5895 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5896 if (need <= htab->got_gap)
5897 {
5898 where = max_before_header - htab->got_gap;
5899 htab->got_gap -= need;
5900 }
5901 else
5902 {
5903 if (htab->got->size + need > max_before_header
5904 && htab->got->size <= max_before_header)
5905 {
5906 htab->got_gap = max_before_header - htab->got->size;
5907 htab->got->size = max_before_header + htab->got_header_size;
5908 }
5909 where = htab->got->size;
5910 htab->got->size += need;
5911 }
5912 }
5913 return where;
5914 }
5915
5916 /* Allocate space in associated reloc sections for dynamic relocs. */
5917
5918 static bfd_boolean
5919 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5920 {
5921 struct bfd_link_info *info = inf;
5922 struct ppc_elf_link_hash_entry *eh;
5923 struct ppc_elf_link_hash_table *htab;
5924 struct elf_dyn_relocs *p;
5925
5926 if (h->root.type == bfd_link_hash_indirect)
5927 return TRUE;
5928
5929 htab = ppc_elf_hash_table (info);
5930 if (htab->elf.dynamic_sections_created
5931 || h->type == STT_GNU_IFUNC)
5932 {
5933 struct plt_entry *ent;
5934 bfd_boolean doneone = FALSE;
5935 bfd_vma plt_offset = 0, glink_offset = 0;
5936 bfd_boolean dyn;
5937
5938 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5939 if (ent->plt.refcount > 0)
5940 {
5941 /* Make sure this symbol is output as a dynamic symbol. */
5942 if (h->dynindx == -1
5943 && !h->forced_local
5944 && !h->def_regular
5945 && htab->elf.dynamic_sections_created)
5946 {
5947 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5948 return FALSE;
5949 }
5950
5951 dyn = htab->elf.dynamic_sections_created;
5952 if (bfd_link_pic (info)
5953 || h->type == STT_GNU_IFUNC
5954 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5955 {
5956 asection *s = htab->plt;
5957 if (!dyn || h->dynindx == -1)
5958 s = htab->iplt;
5959
5960 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5961 {
5962 if (!doneone)
5963 {
5964 plt_offset = s->size;
5965 s->size += 4;
5966 }
5967 ent->plt.offset = plt_offset;
5968
5969 s = htab->glink;
5970 if (!doneone || bfd_link_pic (info))
5971 {
5972 glink_offset = s->size;
5973 s->size += GLINK_ENTRY_SIZE;
5974 if (h == htab->tls_get_addr
5975 && !htab->params->no_tls_get_addr_opt)
5976 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5977 }
5978 if (!doneone
5979 && !bfd_link_pic (info)
5980 && h->def_dynamic
5981 && !h->def_regular)
5982 {
5983 h->root.u.def.section = s;
5984 h->root.u.def.value = glink_offset;
5985 }
5986 ent->glink_offset = glink_offset;
5987
5988 if (htab->params->emit_stub_syms
5989 && !add_stub_sym (ent, h, info))
5990 return FALSE;
5991 }
5992 else
5993 {
5994 if (!doneone)
5995 {
5996 /* If this is the first .plt entry, make room
5997 for the special first entry. */
5998 if (s->size == 0)
5999 s->size += htab->plt_initial_entry_size;
6000
6001 /* The PowerPC PLT is actually composed of two
6002 parts, the first part is 2 words (for a load
6003 and a jump), and then there is a remaining
6004 word available at the end. */
6005 plt_offset = (htab->plt_initial_entry_size
6006 + (htab->plt_slot_size
6007 * ((s->size
6008 - htab->plt_initial_entry_size)
6009 / htab->plt_entry_size)));
6010
6011 /* If this symbol is not defined in a regular
6012 file, and we are not generating a shared
6013 library, then set the symbol to this location
6014 in the .plt. This is to avoid text
6015 relocations, and is required to make
6016 function pointers compare as equal between
6017 the normal executable and the shared library. */
6018 if (! bfd_link_pic (info)
6019 && h->def_dynamic
6020 && !h->def_regular)
6021 {
6022 h->root.u.def.section = s;
6023 h->root.u.def.value = plt_offset;
6024 }
6025
6026 /* Make room for this entry. */
6027 s->size += htab->plt_entry_size;
6028 /* After the 8192nd entry, room for two entries
6029 is allocated. */
6030 if (htab->plt_type == PLT_OLD
6031 && (s->size - htab->plt_initial_entry_size)
6032 / htab->plt_entry_size
6033 > PLT_NUM_SINGLE_ENTRIES)
6034 s->size += htab->plt_entry_size;
6035 }
6036 ent->plt.offset = plt_offset;
6037 }
6038
6039 /* We also need to make an entry in the .rela.plt section. */
6040 if (!doneone)
6041 {
6042 if (!htab->elf.dynamic_sections_created
6043 || h->dynindx == -1)
6044 htab->reliplt->size += sizeof (Elf32_External_Rela);
6045 else
6046 {
6047 htab->relplt->size += sizeof (Elf32_External_Rela);
6048
6049 if (htab->plt_type == PLT_VXWORKS)
6050 {
6051 /* Allocate space for the unloaded relocations. */
6052 if (!bfd_link_pic (info)
6053 && htab->elf.dynamic_sections_created)
6054 {
6055 if (ent->plt.offset
6056 == (bfd_vma) htab->plt_initial_entry_size)
6057 {
6058 htab->srelplt2->size
6059 += (sizeof (Elf32_External_Rela)
6060 * VXWORKS_PLTRESOLVE_RELOCS);
6061 }
6062
6063 htab->srelplt2->size
6064 += (sizeof (Elf32_External_Rela)
6065 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6066 }
6067
6068 /* Every PLT entry has an associated GOT entry in
6069 .got.plt. */
6070 htab->sgotplt->size += 4;
6071 }
6072 }
6073 doneone = TRUE;
6074 }
6075 }
6076 else
6077 ent->plt.offset = (bfd_vma) -1;
6078 }
6079 else
6080 ent->plt.offset = (bfd_vma) -1;
6081
6082 if (!doneone)
6083 {
6084 h->plt.plist = NULL;
6085 h->needs_plt = 0;
6086 }
6087 }
6088 else
6089 {
6090 h->plt.plist = NULL;
6091 h->needs_plt = 0;
6092 }
6093
6094 eh = (struct ppc_elf_link_hash_entry *) h;
6095 if (eh->elf.got.refcount > 0
6096 || (ELIMINATE_COPY_RELOCS
6097 && !eh->elf.def_regular
6098 && eh->elf.protected_def
6099 && eh->has_addr16_ha
6100 && eh->has_addr16_lo
6101 && htab->params->pic_fixup > 0))
6102 {
6103 bfd_boolean dyn;
6104 unsigned int need;
6105
6106 /* Make sure this symbol is output as a dynamic symbol. */
6107 if (eh->elf.dynindx == -1
6108 && !eh->elf.forced_local
6109 && eh->elf.type != STT_GNU_IFUNC
6110 && htab->elf.dynamic_sections_created)
6111 {
6112 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
6113 return FALSE;
6114 }
6115
6116 need = 0;
6117 if ((eh->tls_mask & TLS_TLS) != 0)
6118 {
6119 if ((eh->tls_mask & TLS_LD) != 0)
6120 {
6121 if (!eh->elf.def_dynamic)
6122 /* We'll just use htab->tlsld_got.offset. This should
6123 always be the case. It's a little odd if we have
6124 a local dynamic reloc against a non-local symbol. */
6125 htab->tlsld_got.refcount += 1;
6126 else
6127 need += 8;
6128 }
6129 if ((eh->tls_mask & TLS_GD) != 0)
6130 need += 8;
6131 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6132 need += 4;
6133 if ((eh->tls_mask & TLS_DTPREL) != 0)
6134 need += 4;
6135 }
6136 else
6137 need += 4;
6138 if (need == 0)
6139 eh->elf.got.offset = (bfd_vma) -1;
6140 else
6141 {
6142 eh->elf.got.offset = allocate_got (htab, need);
6143 dyn = htab->elf.dynamic_sections_created;
6144 if ((bfd_link_pic (info)
6145 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
6146 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
6147 || eh->elf.root.type != bfd_link_hash_undefweak))
6148 {
6149 asection *rsec = htab->relgot;
6150
6151 if (eh->elf.type == STT_GNU_IFUNC)
6152 rsec = htab->reliplt;
6153 /* All the entries we allocated need relocs.
6154 Except LD only needs one. */
6155 if ((eh->tls_mask & TLS_LD) != 0
6156 && eh->elf.def_dynamic)
6157 need -= 4;
6158 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6159 }
6160 }
6161 }
6162 else
6163 eh->elf.got.offset = (bfd_vma) -1;
6164
6165 if (eh->dyn_relocs == NULL
6166 || !htab->elf.dynamic_sections_created)
6167 return TRUE;
6168
6169 /* In the shared -Bsymbolic case, discard space allocated for
6170 dynamic pc-relative relocs against symbols which turn out to be
6171 defined in regular objects. For the normal shared case, discard
6172 space for relocs that have become local due to symbol visibility
6173 changes. */
6174
6175 if (bfd_link_pic (info))
6176 {
6177 /* Relocs that use pc_count are those that appear on a call insn,
6178 or certain REL relocs (see must_be_dyn_reloc) that can be
6179 generated via assembly. We want calls to protected symbols to
6180 resolve directly to the function rather than going via the plt.
6181 If people want function pointer comparisons to work as expected
6182 then they should avoid writing weird assembly. */
6183 if (SYMBOL_CALLS_LOCAL (info, h))
6184 {
6185 struct elf_dyn_relocs **pp;
6186
6187 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6188 {
6189 p->count -= p->pc_count;
6190 p->pc_count = 0;
6191 if (p->count == 0)
6192 *pp = p->next;
6193 else
6194 pp = &p->next;
6195 }
6196 }
6197
6198 if (htab->is_vxworks)
6199 {
6200 struct elf_dyn_relocs **pp;
6201
6202 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6203 {
6204 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6205 *pp = p->next;
6206 else
6207 pp = &p->next;
6208 }
6209 }
6210
6211 /* Discard relocs on undefined symbols that must be local. */
6212 if (eh->dyn_relocs != NULL
6213 && h->root.type == bfd_link_hash_undefined
6214 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6215 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6216 eh->dyn_relocs = NULL;
6217
6218 /* Also discard relocs on undefined weak syms with non-default
6219 visibility. */
6220 if (eh->dyn_relocs != NULL
6221 && h->root.type == bfd_link_hash_undefweak)
6222 {
6223 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6224 eh->dyn_relocs = NULL;
6225
6226 /* Make sure undefined weak symbols are output as a dynamic
6227 symbol in PIEs. */
6228 else if (h->dynindx == -1
6229 && !h->forced_local
6230 && !h->def_regular)
6231 {
6232 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6233 return FALSE;
6234 }
6235 }
6236 }
6237 else if (ELIMINATE_COPY_RELOCS)
6238 {
6239 /* For the non-shared case, discard space for relocs against
6240 symbols which turn out to need copy relocs or are not
6241 dynamic. */
6242
6243 if (!h->non_got_ref
6244 && !h->def_regular
6245 && !(h->protected_def
6246 && eh->has_addr16_ha
6247 && eh->has_addr16_lo
6248 && htab->params->pic_fixup > 0))
6249 {
6250 /* Make sure this symbol is output as a dynamic symbol.
6251 Undefined weak syms won't yet be marked as dynamic. */
6252 if (h->dynindx == -1
6253 && !h->forced_local)
6254 {
6255 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6256 return FALSE;
6257 }
6258
6259 /* If that succeeded, we know we'll be keeping all the
6260 relocs. */
6261 if (h->dynindx != -1)
6262 goto keep;
6263 }
6264
6265 eh->dyn_relocs = NULL;
6266
6267 keep: ;
6268 }
6269
6270 /* Finally, allocate space. */
6271 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6272 {
6273 asection *sreloc = elf_section_data (p->sec)->sreloc;
6274 if (eh->elf.type == STT_GNU_IFUNC)
6275 sreloc = htab->reliplt;
6276 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6277 }
6278
6279 return TRUE;
6280 }
6281
6282 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6283 read-only sections. */
6284
6285 static bfd_boolean
6286 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6287 {
6288 if (h->root.type == bfd_link_hash_indirect)
6289 return TRUE;
6290
6291 if (readonly_dynrelocs (h))
6292 {
6293 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6294
6295 /* Not an error, just cut short the traversal. */
6296 return FALSE;
6297 }
6298 return TRUE;
6299 }
6300
6301 static const unsigned char glink_eh_frame_cie[] =
6302 {
6303 0, 0, 0, 16, /* length. */
6304 0, 0, 0, 0, /* id. */
6305 1, /* CIE version. */
6306 'z', 'R', 0, /* Augmentation string. */
6307 4, /* Code alignment. */
6308 0x7c, /* Data alignment. */
6309 65, /* RA reg. */
6310 1, /* Augmentation size. */
6311 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6312 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6313 };
6314
6315 /* Set the sizes of the dynamic sections. */
6316
6317 static bfd_boolean
6318 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6319 struct bfd_link_info *info)
6320 {
6321 struct ppc_elf_link_hash_table *htab;
6322 asection *s;
6323 bfd_boolean relocs;
6324 bfd *ibfd;
6325
6326 #ifdef DEBUG
6327 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6328 #endif
6329
6330 htab = ppc_elf_hash_table (info);
6331 BFD_ASSERT (htab->elf.dynobj != NULL);
6332
6333 if (elf_hash_table (info)->dynamic_sections_created)
6334 {
6335 /* Set the contents of the .interp section to the interpreter. */
6336 if (bfd_link_executable (info) && !info->nointerp)
6337 {
6338 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6339 BFD_ASSERT (s != NULL);
6340 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6341 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6342 }
6343 }
6344
6345 if (htab->plt_type == PLT_OLD)
6346 htab->got_header_size = 16;
6347 else if (htab->plt_type == PLT_NEW)
6348 htab->got_header_size = 12;
6349
6350 /* Set up .got offsets for local syms, and space for local dynamic
6351 relocs. */
6352 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6353 {
6354 bfd_signed_vma *local_got;
6355 bfd_signed_vma *end_local_got;
6356 struct plt_entry **local_plt;
6357 struct plt_entry **end_local_plt;
6358 char *lgot_masks;
6359 bfd_size_type locsymcount;
6360 Elf_Internal_Shdr *symtab_hdr;
6361
6362 if (!is_ppc_elf (ibfd))
6363 continue;
6364
6365 for (s = ibfd->sections; s != NULL; s = s->next)
6366 {
6367 struct ppc_dyn_relocs *p;
6368
6369 for (p = ((struct ppc_dyn_relocs *)
6370 elf_section_data (s)->local_dynrel);
6371 p != NULL;
6372 p = p->next)
6373 {
6374 if (!bfd_is_abs_section (p->sec)
6375 && bfd_is_abs_section (p->sec->output_section))
6376 {
6377 /* Input section has been discarded, either because
6378 it is a copy of a linkonce section or due to
6379 linker script /DISCARD/, so we'll be discarding
6380 the relocs too. */
6381 }
6382 else if (htab->is_vxworks
6383 && strcmp (p->sec->output_section->name,
6384 ".tls_vars") == 0)
6385 {
6386 /* Relocations in vxworks .tls_vars sections are
6387 handled specially by the loader. */
6388 }
6389 else if (p->count != 0)
6390 {
6391 asection *sreloc = elf_section_data (p->sec)->sreloc;
6392 if (p->ifunc)
6393 sreloc = htab->reliplt;
6394 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6395 if ((p->sec->output_section->flags
6396 & (SEC_READONLY | SEC_ALLOC))
6397 == (SEC_READONLY | SEC_ALLOC))
6398 info->flags |= DF_TEXTREL;
6399 }
6400 }
6401 }
6402
6403 local_got = elf_local_got_refcounts (ibfd);
6404 if (!local_got)
6405 continue;
6406
6407 symtab_hdr = &elf_symtab_hdr (ibfd);
6408 locsymcount = symtab_hdr->sh_info;
6409 end_local_got = local_got + locsymcount;
6410 local_plt = (struct plt_entry **) end_local_got;
6411 end_local_plt = local_plt + locsymcount;
6412 lgot_masks = (char *) end_local_plt;
6413
6414 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6415 if (*local_got > 0)
6416 {
6417 unsigned int need = 0;
6418 if ((*lgot_masks & TLS_TLS) != 0)
6419 {
6420 if ((*lgot_masks & TLS_GD) != 0)
6421 need += 8;
6422 if ((*lgot_masks & TLS_LD) != 0)
6423 htab->tlsld_got.refcount += 1;
6424 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6425 need += 4;
6426 if ((*lgot_masks & TLS_DTPREL) != 0)
6427 need += 4;
6428 }
6429 else
6430 need += 4;
6431 if (need == 0)
6432 *local_got = (bfd_vma) -1;
6433 else
6434 {
6435 *local_got = allocate_got (htab, need);
6436 if (bfd_link_pic (info))
6437 {
6438 asection *srel = htab->relgot;
6439 if ((*lgot_masks & PLT_IFUNC) != 0)
6440 srel = htab->reliplt;
6441 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6442 }
6443 }
6444 }
6445 else
6446 *local_got = (bfd_vma) -1;
6447
6448 if (htab->is_vxworks)
6449 continue;
6450
6451 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6452 for (; local_plt < end_local_plt; ++local_plt)
6453 {
6454 struct plt_entry *ent;
6455 bfd_boolean doneone = FALSE;
6456 bfd_vma plt_offset = 0, glink_offset = 0;
6457
6458 for (ent = *local_plt; ent != NULL; ent = ent->next)
6459 if (ent->plt.refcount > 0)
6460 {
6461 s = htab->iplt;
6462
6463 if (!doneone)
6464 {
6465 plt_offset = s->size;
6466 s->size += 4;
6467 }
6468 ent->plt.offset = plt_offset;
6469
6470 s = htab->glink;
6471 if (!doneone || bfd_link_pic (info))
6472 {
6473 glink_offset = s->size;
6474 s->size += GLINK_ENTRY_SIZE;
6475 }
6476 ent->glink_offset = glink_offset;
6477
6478 if (!doneone)
6479 {
6480 htab->reliplt->size += sizeof (Elf32_External_Rela);
6481 doneone = TRUE;
6482 }
6483 }
6484 else
6485 ent->plt.offset = (bfd_vma) -1;
6486 }
6487 }
6488
6489 /* Allocate space for global sym dynamic relocs. */
6490 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6491
6492 if (htab->tlsld_got.refcount > 0)
6493 {
6494 htab->tlsld_got.offset = allocate_got (htab, 8);
6495 if (bfd_link_pic (info))
6496 htab->relgot->size += sizeof (Elf32_External_Rela);
6497 }
6498 else
6499 htab->tlsld_got.offset = (bfd_vma) -1;
6500
6501 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6502 {
6503 unsigned int g_o_t = 32768;
6504
6505 /* If we haven't allocated the header, do so now. When we get here,
6506 for old plt/got the got size will be 0 to 32764 (not allocated),
6507 or 32780 to 65536 (header allocated). For new plt/got, the
6508 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6509 if (htab->got->size <= 32768)
6510 {
6511 g_o_t = htab->got->size;
6512 if (htab->plt_type == PLT_OLD)
6513 g_o_t += 4;
6514 htab->got->size += htab->got_header_size;
6515 }
6516
6517 htab->elf.hgot->root.u.def.value = g_o_t;
6518 }
6519 if (bfd_link_pic (info))
6520 {
6521 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6522
6523 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6524 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6525 }
6526 if (info->emitrelocations)
6527 {
6528 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6529
6530 if (sda != NULL && sda->ref_regular)
6531 sda->root.u.def.section->flags |= SEC_KEEP;
6532 sda = htab->sdata[1].sym;
6533 if (sda != NULL && sda->ref_regular)
6534 sda->root.u.def.section->flags |= SEC_KEEP;
6535 }
6536
6537 if (htab->glink != NULL
6538 && htab->glink->size != 0
6539 && htab->elf.dynamic_sections_created)
6540 {
6541 htab->glink_pltresolve = htab->glink->size;
6542 /* Space for the branch table. ??? We don't need entries for
6543 non-dynamic symbols in this table. This case can arise with
6544 static ifuncs or forced local ifuncs. */
6545 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6546 /* Pad out to align the start of PLTresolve. */
6547 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6548 ? 63 : 15);
6549 htab->glink->size += GLINK_PLTRESOLVE;
6550
6551 if (htab->params->emit_stub_syms)
6552 {
6553 struct elf_link_hash_entry *sh;
6554 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6555 TRUE, FALSE, FALSE);
6556 if (sh == NULL)
6557 return FALSE;
6558 if (sh->root.type == bfd_link_hash_new)
6559 {
6560 sh->root.type = bfd_link_hash_defined;
6561 sh->root.u.def.section = htab->glink;
6562 sh->root.u.def.value = htab->glink_pltresolve;
6563 sh->ref_regular = 1;
6564 sh->def_regular = 1;
6565 sh->ref_regular_nonweak = 1;
6566 sh->forced_local = 1;
6567 sh->non_elf = 0;
6568 sh->root.linker_def = 1;
6569 }
6570 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6571 TRUE, FALSE, FALSE);
6572 if (sh == NULL)
6573 return FALSE;
6574 if (sh->root.type == bfd_link_hash_new)
6575 {
6576 sh->root.type = bfd_link_hash_defined;
6577 sh->root.u.def.section = htab->glink;
6578 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6579 sh->ref_regular = 1;
6580 sh->def_regular = 1;
6581 sh->ref_regular_nonweak = 1;
6582 sh->forced_local = 1;
6583 sh->non_elf = 0;
6584 sh->root.linker_def = 1;
6585 }
6586 }
6587 }
6588
6589 if (htab->glink != NULL
6590 && htab->glink->size != 0
6591 && htab->glink_eh_frame != NULL
6592 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6593 && _bfd_elf_eh_frame_present (info))
6594 {
6595 s = htab->glink_eh_frame;
6596 s->size = sizeof (glink_eh_frame_cie) + 20;
6597 if (bfd_link_pic (info))
6598 {
6599 s->size += 4;
6600 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6601 s->size += 4;
6602 }
6603 }
6604
6605 /* We've now determined the sizes of the various dynamic sections.
6606 Allocate memory for them. */
6607 relocs = FALSE;
6608 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6609 {
6610 bfd_boolean strip_section = TRUE;
6611
6612 if ((s->flags & SEC_LINKER_CREATED) == 0)
6613 continue;
6614
6615 if (s == htab->plt
6616 || s == htab->got)
6617 {
6618 /* We'd like to strip these sections if they aren't needed, but if
6619 we've exported dynamic symbols from them we must leave them.
6620 It's too late to tell BFD to get rid of the symbols. */
6621 if (htab->elf.hplt != NULL)
6622 strip_section = FALSE;
6623 /* Strip this section if we don't need it; see the
6624 comment below. */
6625 }
6626 else if (s == htab->iplt
6627 || s == htab->glink
6628 || s == htab->glink_eh_frame
6629 || s == htab->sgotplt
6630 || s == htab->sbss
6631 || s == htab->dynbss
6632 || s == htab->dynsbss)
6633 {
6634 /* Strip these too. */
6635 }
6636 else if (s == htab->sdata[0].section
6637 || s == htab->sdata[1].section)
6638 {
6639 strip_section = (s->flags & SEC_KEEP) == 0;
6640 }
6641 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6642 ".rela"))
6643 {
6644 if (s->size != 0)
6645 {
6646 /* Remember whether there are any relocation sections. */
6647 relocs = TRUE;
6648
6649 /* We use the reloc_count field as a counter if we need
6650 to copy relocs into the output file. */
6651 s->reloc_count = 0;
6652 }
6653 }
6654 else
6655 {
6656 /* It's not one of our sections, so don't allocate space. */
6657 continue;
6658 }
6659
6660 if (s->size == 0 && strip_section)
6661 {
6662 /* If we don't need this section, strip it from the
6663 output file. This is mostly to handle .rela.bss and
6664 .rela.plt. We must create both sections in
6665 create_dynamic_sections, because they must be created
6666 before the linker maps input sections to output
6667 sections. The linker does that before
6668 adjust_dynamic_symbol is called, and it is that
6669 function which decides whether anything needs to go
6670 into these sections. */
6671 s->flags |= SEC_EXCLUDE;
6672 continue;
6673 }
6674
6675 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6676 continue;
6677
6678 /* Allocate memory for the section contents. */
6679 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6680 if (s->contents == NULL)
6681 return FALSE;
6682 }
6683
6684 if (htab->elf.dynamic_sections_created)
6685 {
6686 /* Add some entries to the .dynamic section. We fill in the
6687 values later, in ppc_elf_finish_dynamic_sections, but we
6688 must add the entries now so that we get the correct size for
6689 the .dynamic section. The DT_DEBUG entry is filled in by the
6690 dynamic linker and used by the debugger. */
6691 #define add_dynamic_entry(TAG, VAL) \
6692 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6693
6694 if (bfd_link_executable (info))
6695 {
6696 if (!add_dynamic_entry (DT_DEBUG, 0))
6697 return FALSE;
6698 }
6699
6700 if (htab->plt != NULL && htab->plt->size != 0)
6701 {
6702 if (!add_dynamic_entry (DT_PLTGOT, 0)
6703 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6704 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6705 || !add_dynamic_entry (DT_JMPREL, 0))
6706 return FALSE;
6707 }
6708
6709 if (htab->plt_type == PLT_NEW
6710 && htab->glink != NULL
6711 && htab->glink->size != 0)
6712 {
6713 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6714 return FALSE;
6715 if (!htab->params->no_tls_get_addr_opt
6716 && htab->tls_get_addr != NULL
6717 && htab->tls_get_addr->plt.plist != NULL
6718 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6719 return FALSE;
6720 }
6721
6722 if (relocs)
6723 {
6724 if (!add_dynamic_entry (DT_RELA, 0)
6725 || !add_dynamic_entry (DT_RELASZ, 0)
6726 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6727 return FALSE;
6728 }
6729
6730 /* If any dynamic relocs apply to a read-only section, then we
6731 need a DT_TEXTREL entry. */
6732 if ((info->flags & DF_TEXTREL) == 0)
6733 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6734 info);
6735
6736 if ((info->flags & DF_TEXTREL) != 0)
6737 {
6738 if (!add_dynamic_entry (DT_TEXTREL, 0))
6739 return FALSE;
6740 }
6741 if (htab->is_vxworks
6742 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6743 return FALSE;
6744 }
6745 #undef add_dynamic_entry
6746
6747 if (htab->glink_eh_frame != NULL
6748 && htab->glink_eh_frame->contents != NULL)
6749 {
6750 unsigned char *p = htab->glink_eh_frame->contents;
6751 bfd_vma val;
6752
6753 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6754 /* CIE length (rewrite in case little-endian). */
6755 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6756 p += sizeof (glink_eh_frame_cie);
6757 /* FDE length. */
6758 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6759 bfd_put_32 (htab->elf.dynobj, val, p);
6760 p += 4;
6761 /* CIE pointer. */
6762 val = p - htab->glink_eh_frame->contents;
6763 bfd_put_32 (htab->elf.dynobj, val, p);
6764 p += 4;
6765 /* Offset to .glink. Set later. */
6766 p += 4;
6767 /* .glink size. */
6768 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6769 p += 4;
6770 /* Augmentation. */
6771 p += 1;
6772
6773 if (bfd_link_pic (info)
6774 && htab->elf.dynamic_sections_created)
6775 {
6776 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6777 if (adv < 64)
6778 *p++ = DW_CFA_advance_loc + adv;
6779 else if (adv < 256)
6780 {
6781 *p++ = DW_CFA_advance_loc1;
6782 *p++ = adv;
6783 }
6784 else if (adv < 65536)
6785 {
6786 *p++ = DW_CFA_advance_loc2;
6787 bfd_put_16 (htab->elf.dynobj, adv, p);
6788 p += 2;
6789 }
6790 else
6791 {
6792 *p++ = DW_CFA_advance_loc4;
6793 bfd_put_32 (htab->elf.dynobj, adv, p);
6794 p += 4;
6795 }
6796 *p++ = DW_CFA_register;
6797 *p++ = 65;
6798 p++;
6799 *p++ = DW_CFA_advance_loc + 4;
6800 *p++ = DW_CFA_restore_extended;
6801 *p++ = 65;
6802 }
6803 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6804 == htab->glink_eh_frame->size);
6805 }
6806
6807 return TRUE;
6808 }
6809
6810 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6811 if it looks like nothing is using them. */
6812
6813 static void
6814 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6815 {
6816 struct elf_link_hash_entry *sda = lsect->sym;
6817
6818 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6819 {
6820 asection *s;
6821
6822 s = bfd_get_section_by_name (output_bfd, lsect->name);
6823 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6824 {
6825 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6826 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6827 {
6828 sda->def_regular = 0;
6829 /* This is somewhat magic. See elf_link_output_extsym. */
6830 sda->ref_dynamic = 1;
6831 sda->forced_local = 0;
6832 }
6833 }
6834 }
6835 }
6836
6837 void
6838 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6839 {
6840 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6841
6842 if (htab != NULL)
6843 {
6844 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6845 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6846 }
6847 }
6848
6849
6850 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6851
6852 static bfd_boolean
6853 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6854 {
6855 if (h->plt.plist != NULL
6856 && !h->def_regular
6857 && (!h->pointer_equality_needed
6858 || !h->ref_regular_nonweak))
6859 return FALSE;
6860
6861 return _bfd_elf_hash_symbol (h);
6862 }
6863 \f
6864 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6865
6866 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6867 used for some functions that are allowed to break the ABI). */
6868 static const int shared_stub_entry[] =
6869 {
6870 0x7c0802a6, /* mflr 0 */
6871 0x429f0005, /* bcl 20, 31, .Lxxx */
6872 0x7d8802a6, /* mflr 12 */
6873 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6874 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6875 0x7c0803a6, /* mtlr 0 */
6876 0x7d8903a6, /* mtctr 12 */
6877 0x4e800420, /* bctr */
6878 };
6879
6880 static const int stub_entry[] =
6881 {
6882 0x3d800000, /* lis 12,xxx@ha */
6883 0x398c0000, /* addi 12,12,xxx@l */
6884 0x7d8903a6, /* mtctr 12 */
6885 0x4e800420, /* bctr */
6886 };
6887
6888 struct ppc_elf_relax_info
6889 {
6890 unsigned int workaround_size;
6891 unsigned int picfixup_size;
6892 };
6893
6894 /* This function implements long branch trampolines, and the ppc476
6895 icache bug workaround. Any section needing trampolines or patch
6896 space for the workaround has its size extended so that we can
6897 add trampolines at the end of the section. */
6898
6899 static bfd_boolean
6900 ppc_elf_relax_section (bfd *abfd,
6901 asection *isec,
6902 struct bfd_link_info *link_info,
6903 bfd_boolean *again)
6904 {
6905 struct one_branch_fixup
6906 {
6907 struct one_branch_fixup *next;
6908 asection *tsec;
6909 /* Final link, can use the symbol offset. For a
6910 relocatable link we use the symbol's index. */
6911 bfd_vma toff;
6912 bfd_vma trampoff;
6913 };
6914
6915 Elf_Internal_Shdr *symtab_hdr;
6916 bfd_byte *contents = NULL;
6917 Elf_Internal_Sym *isymbuf = NULL;
6918 Elf_Internal_Rela *internal_relocs = NULL;
6919 Elf_Internal_Rela *irel, *irelend = NULL;
6920 struct one_branch_fixup *branch_fixups = NULL;
6921 struct ppc_elf_relax_info *relax_info = NULL;
6922 unsigned changes = 0;
6923 bfd_boolean workaround_change;
6924 struct ppc_elf_link_hash_table *htab;
6925 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6926 asection *got2;
6927 bfd_boolean maybe_pasted;
6928
6929 *again = FALSE;
6930
6931 /* No need to do anything with non-alloc or non-code sections. */
6932 if ((isec->flags & SEC_ALLOC) == 0
6933 || (isec->flags & SEC_CODE) == 0
6934 || (isec->flags & SEC_LINKER_CREATED) != 0
6935 || isec->size < 4)
6936 return TRUE;
6937
6938 /* We cannot represent the required PIC relocs in the output, so don't
6939 do anything. The linker doesn't support mixing -shared and -r
6940 anyway. */
6941 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6942 return TRUE;
6943
6944 htab = ppc_elf_hash_table (link_info);
6945 if (htab == NULL)
6946 return TRUE;
6947
6948 isec->size = (isec->size + 3) & -4;
6949 if (isec->rawsize == 0)
6950 isec->rawsize = isec->size;
6951 trampbase = isec->size;
6952
6953 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6954 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6955 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6956
6957 if (htab->params->ppc476_workaround
6958 || htab->params->pic_fixup > 0)
6959 {
6960 if (elf_section_data (isec)->sec_info == NULL)
6961 {
6962 elf_section_data (isec)->sec_info
6963 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6964 if (elf_section_data (isec)->sec_info == NULL)
6965 return FALSE;
6966 }
6967 relax_info = elf_section_data (isec)->sec_info;
6968 trampbase -= relax_info->workaround_size;
6969 }
6970
6971 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6972 || strcmp (isec->output_section->name, ".fini") == 0);
6973 /* Space for a branch around any trampolines. */
6974 trampoff = trampbase;
6975 if (maybe_pasted && trampbase == isec->rawsize)
6976 trampoff += 4;
6977
6978 symtab_hdr = &elf_symtab_hdr (abfd);
6979 picfixup_size = 0;
6980 if (htab->params->branch_trampolines
6981 || htab->params->pic_fixup > 0)
6982 {
6983 /* Get a copy of the native relocations. */
6984 if (isec->reloc_count != 0)
6985 {
6986 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6987 link_info->keep_memory);
6988 if (internal_relocs == NULL)
6989 goto error_return;
6990 }
6991
6992 got2 = bfd_get_section_by_name (abfd, ".got2");
6993
6994 irelend = internal_relocs + isec->reloc_count;
6995 for (irel = internal_relocs; irel < irelend; irel++)
6996 {
6997 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6998 bfd_vma toff, roff;
6999 asection *tsec;
7000 struct one_branch_fixup *f;
7001 size_t insn_offset = 0;
7002 bfd_vma max_branch_offset = 0, val;
7003 bfd_byte *hit_addr;
7004 unsigned long t0;
7005 struct elf_link_hash_entry *h;
7006 struct plt_entry **plist;
7007 unsigned char sym_type;
7008
7009 switch (r_type)
7010 {
7011 case R_PPC_REL24:
7012 case R_PPC_LOCAL24PC:
7013 case R_PPC_PLTREL24:
7014 max_branch_offset = 1 << 25;
7015 break;
7016
7017 case R_PPC_REL14:
7018 case R_PPC_REL14_BRTAKEN:
7019 case R_PPC_REL14_BRNTAKEN:
7020 max_branch_offset = 1 << 15;
7021 break;
7022
7023 case R_PPC_ADDR16_HA:
7024 if (htab->params->pic_fixup > 0)
7025 break;
7026 continue;
7027
7028 default:
7029 continue;
7030 }
7031
7032 /* Get the value of the symbol referred to by the reloc. */
7033 h = NULL;
7034 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
7035 {
7036 /* A local symbol. */
7037 Elf_Internal_Sym *isym;
7038
7039 /* Read this BFD's local symbols. */
7040 if (isymbuf == NULL)
7041 {
7042 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7043 if (isymbuf == NULL)
7044 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7045 symtab_hdr->sh_info, 0,
7046 NULL, NULL, NULL);
7047 if (isymbuf == 0)
7048 goto error_return;
7049 }
7050 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7051 if (isym->st_shndx == SHN_UNDEF)
7052 tsec = bfd_und_section_ptr;
7053 else if (isym->st_shndx == SHN_ABS)
7054 tsec = bfd_abs_section_ptr;
7055 else if (isym->st_shndx == SHN_COMMON)
7056 tsec = bfd_com_section_ptr;
7057 else
7058 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7059
7060 toff = isym->st_value;
7061 sym_type = ELF_ST_TYPE (isym->st_info);
7062 }
7063 else
7064 {
7065 /* Global symbol handling. */
7066 unsigned long indx;
7067
7068 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7069 h = elf_sym_hashes (abfd)[indx];
7070
7071 while (h->root.type == bfd_link_hash_indirect
7072 || h->root.type == bfd_link_hash_warning)
7073 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7074
7075 if (h->root.type == bfd_link_hash_defined
7076 || h->root.type == bfd_link_hash_defweak)
7077 {
7078 tsec = h->root.u.def.section;
7079 toff = h->root.u.def.value;
7080 }
7081 else if (h->root.type == bfd_link_hash_undefined
7082 || h->root.type == bfd_link_hash_undefweak)
7083 {
7084 tsec = bfd_und_section_ptr;
7085 toff = bfd_link_relocatable (link_info) ? indx : 0;
7086 }
7087 else
7088 continue;
7089
7090 /* If this branch is to __tls_get_addr then we may later
7091 optimise away the call. We won't be needing a long-
7092 branch stub in that case. */
7093 if (bfd_link_executable (link_info)
7094 && h == htab->tls_get_addr
7095 && irel != internal_relocs)
7096 {
7097 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7098 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7099 unsigned int tls_mask = 0;
7100
7101 /* The previous reloc should be one of R_PPC_TLSGD or
7102 R_PPC_TLSLD, or for older object files, a reloc
7103 on the __tls_get_addr arg setup insn. Get tls
7104 mask bits from the symbol on that reloc. */
7105 if (t_symndx < symtab_hdr->sh_info)
7106 {
7107 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7108
7109 if (local_got_offsets != NULL)
7110 {
7111 struct plt_entry **local_plt = (struct plt_entry **)
7112 (local_got_offsets + symtab_hdr->sh_info);
7113 char *lgot_masks = (char *)
7114 (local_plt + symtab_hdr->sh_info);
7115 tls_mask = lgot_masks[t_symndx];
7116 }
7117 }
7118 else
7119 {
7120 struct elf_link_hash_entry *th
7121 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7122
7123 while (th->root.type == bfd_link_hash_indirect
7124 || th->root.type == bfd_link_hash_warning)
7125 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7126
7127 tls_mask
7128 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7129 }
7130
7131 /* The mask bits tell us if the call will be
7132 optimised away. */
7133 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7134 && (t_rtype == R_PPC_TLSGD
7135 || t_rtype == R_PPC_GOT_TLSGD16
7136 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7137 continue;
7138 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7139 && (t_rtype == R_PPC_TLSLD
7140 || t_rtype == R_PPC_GOT_TLSLD16
7141 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7142 continue;
7143 }
7144
7145 sym_type = h->type;
7146 }
7147
7148 if (r_type == R_PPC_ADDR16_HA)
7149 {
7150 if (h != NULL
7151 && !h->def_regular
7152 && h->protected_def
7153 && ppc_elf_hash_entry (h)->has_addr16_ha
7154 && ppc_elf_hash_entry (h)->has_addr16_lo)
7155 picfixup_size += 12;
7156 continue;
7157 }
7158
7159 /* The condition here under which we call find_plt_ent must
7160 match that in relocate_section. If we call find_plt_ent here
7161 but not in relocate_section, or vice versa, then the branch
7162 destination used here may be incorrect. */
7163 plist = NULL;
7164 if (h != NULL)
7165 {
7166 /* We know is_branch_reloc (r_type) is true. */
7167 if (h->type == STT_GNU_IFUNC
7168 || r_type == R_PPC_PLTREL24)
7169 plist = &h->plt.plist;
7170 }
7171 else if (sym_type == STT_GNU_IFUNC
7172 && elf_local_got_offsets (abfd) != NULL)
7173 {
7174 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7175 struct plt_entry **local_plt = (struct plt_entry **)
7176 (local_got_offsets + symtab_hdr->sh_info);
7177 plist = local_plt + ELF32_R_SYM (irel->r_info);
7178 }
7179 if (plist != NULL)
7180 {
7181 bfd_vma addend = 0;
7182 struct plt_entry *ent;
7183
7184 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7185 addend = irel->r_addend;
7186 ent = find_plt_ent (plist, got2, addend);
7187 if (ent != NULL)
7188 {
7189 if (htab->plt_type == PLT_NEW
7190 || h == NULL
7191 || !htab->elf.dynamic_sections_created
7192 || h->dynindx == -1)
7193 {
7194 tsec = htab->glink;
7195 toff = ent->glink_offset;
7196 }
7197 else
7198 {
7199 tsec = htab->plt;
7200 toff = ent->plt.offset;
7201 }
7202 }
7203 }
7204
7205 /* If the branch and target are in the same section, you have
7206 no hope of adding stubs. We'll error out later should the
7207 branch overflow. */
7208 if (tsec == isec)
7209 continue;
7210
7211 /* There probably isn't any reason to handle symbols in
7212 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7213 attribute for a code section, and we are only looking at
7214 branches. However, implement it correctly here as a
7215 reference for other target relax_section functions. */
7216 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7217 {
7218 /* At this stage in linking, no SEC_MERGE symbol has been
7219 adjusted, so all references to such symbols need to be
7220 passed through _bfd_merged_section_offset. (Later, in
7221 relocate_section, all SEC_MERGE symbols *except* for
7222 section symbols have been adjusted.)
7223
7224 gas may reduce relocations against symbols in SEC_MERGE
7225 sections to a relocation against the section symbol when
7226 the original addend was zero. When the reloc is against
7227 a section symbol we should include the addend in the
7228 offset passed to _bfd_merged_section_offset, since the
7229 location of interest is the original symbol. On the
7230 other hand, an access to "sym+addend" where "sym" is not
7231 a section symbol should not include the addend; Such an
7232 access is presumed to be an offset from "sym"; The
7233 location of interest is just "sym". */
7234 if (sym_type == STT_SECTION)
7235 toff += irel->r_addend;
7236
7237 toff
7238 = _bfd_merged_section_offset (abfd, &tsec,
7239 elf_section_data (tsec)->sec_info,
7240 toff);
7241
7242 if (sym_type != STT_SECTION)
7243 toff += irel->r_addend;
7244 }
7245 /* PLTREL24 addends are special. */
7246 else if (r_type != R_PPC_PLTREL24)
7247 toff += irel->r_addend;
7248
7249 /* Attempted -shared link of non-pic code loses. */
7250 if ((!bfd_link_relocatable (link_info)
7251 && tsec == bfd_und_section_ptr)
7252 || tsec->output_section == NULL
7253 || (tsec->owner != NULL
7254 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7255 continue;
7256
7257 roff = irel->r_offset;
7258
7259 /* If the branch is in range, no need to do anything. */
7260 if (tsec != bfd_und_section_ptr
7261 && (!bfd_link_relocatable (link_info)
7262 /* A relocatable link may have sections moved during
7263 final link, so do not presume they remain in range. */
7264 || tsec->output_section == isec->output_section))
7265 {
7266 bfd_vma symaddr, reladdr;
7267
7268 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7269 reladdr = isec->output_section->vma + isec->output_offset + roff;
7270 if (symaddr - reladdr + max_branch_offset
7271 < 2 * max_branch_offset)
7272 continue;
7273 }
7274
7275 /* Look for an existing fixup to this address. */
7276 for (f = branch_fixups; f ; f = f->next)
7277 if (f->tsec == tsec && f->toff == toff)
7278 break;
7279
7280 if (f == NULL)
7281 {
7282 size_t size;
7283 unsigned long stub_rtype;
7284
7285 val = trampoff - roff;
7286 if (val >= max_branch_offset)
7287 /* Oh dear, we can't reach a trampoline. Don't try to add
7288 one. We'll report an error later. */
7289 continue;
7290
7291 if (bfd_link_pic (link_info))
7292 {
7293 size = 4 * ARRAY_SIZE (shared_stub_entry);
7294 insn_offset = 12;
7295 }
7296 else
7297 {
7298 size = 4 * ARRAY_SIZE (stub_entry);
7299 insn_offset = 0;
7300 }
7301 stub_rtype = R_PPC_RELAX;
7302 if (tsec == htab->plt
7303 || tsec == htab->glink)
7304 {
7305 stub_rtype = R_PPC_RELAX_PLT;
7306 if (r_type == R_PPC_PLTREL24)
7307 stub_rtype = R_PPC_RELAX_PLTREL24;
7308 }
7309
7310 /* Hijack the old relocation. Since we need two
7311 relocations for this use a "composite" reloc. */
7312 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7313 stub_rtype);
7314 irel->r_offset = trampoff + insn_offset;
7315 if (r_type == R_PPC_PLTREL24
7316 && stub_rtype != R_PPC_RELAX_PLTREL24)
7317 irel->r_addend = 0;
7318
7319 /* Record the fixup so we don't do it again this section. */
7320 f = bfd_malloc (sizeof (*f));
7321 f->next = branch_fixups;
7322 f->tsec = tsec;
7323 f->toff = toff;
7324 f->trampoff = trampoff;
7325 branch_fixups = f;
7326
7327 trampoff += size;
7328 changes++;
7329 }
7330 else
7331 {
7332 val = f->trampoff - roff;
7333 if (val >= max_branch_offset)
7334 continue;
7335
7336 /* Nop out the reloc, since we're finalizing things here. */
7337 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7338 }
7339
7340 /* Get the section contents. */
7341 if (contents == NULL)
7342 {
7343 /* Get cached copy if it exists. */
7344 if (elf_section_data (isec)->this_hdr.contents != NULL)
7345 contents = elf_section_data (isec)->this_hdr.contents;
7346 /* Go get them off disk. */
7347 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7348 goto error_return;
7349 }
7350
7351 /* Fix up the existing branch to hit the trampoline. */
7352 hit_addr = contents + roff;
7353 switch (r_type)
7354 {
7355 case R_PPC_REL24:
7356 case R_PPC_LOCAL24PC:
7357 case R_PPC_PLTREL24:
7358 t0 = bfd_get_32 (abfd, hit_addr);
7359 t0 &= ~0x3fffffc;
7360 t0 |= val & 0x3fffffc;
7361 bfd_put_32 (abfd, t0, hit_addr);
7362 break;
7363
7364 case R_PPC_REL14:
7365 case R_PPC_REL14_BRTAKEN:
7366 case R_PPC_REL14_BRNTAKEN:
7367 t0 = bfd_get_32 (abfd, hit_addr);
7368 t0 &= ~0xfffc;
7369 t0 |= val & 0xfffc;
7370 bfd_put_32 (abfd, t0, hit_addr);
7371 break;
7372 }
7373 }
7374
7375 while (branch_fixups != NULL)
7376 {
7377 struct one_branch_fixup *f = branch_fixups;
7378 branch_fixups = branch_fixups->next;
7379 free (f);
7380 }
7381 }
7382
7383 workaround_change = FALSE;
7384 newsize = trampoff;
7385 if (htab->params->ppc476_workaround
7386 && (!bfd_link_relocatable (link_info)
7387 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7388 {
7389 bfd_vma addr, end_addr;
7390 unsigned int crossings;
7391 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7392
7393 addr = isec->output_section->vma + isec->output_offset;
7394 end_addr = addr + trampoff;
7395 addr &= -pagesize;
7396 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7397 if (crossings != 0)
7398 {
7399 /* Keep space aligned, to ensure the patch code itself does
7400 not cross a page. Don't decrease size calculated on a
7401 previous pass as otherwise we might never settle on a layout. */
7402 newsize = 15 - ((end_addr - 1) & 15);
7403 newsize += crossings * 16;
7404 if (relax_info->workaround_size < newsize)
7405 {
7406 relax_info->workaround_size = newsize;
7407 workaround_change = TRUE;
7408 }
7409 /* Ensure relocate_section is called. */
7410 isec->flags |= SEC_RELOC;
7411 }
7412 newsize = trampoff + relax_info->workaround_size;
7413 }
7414
7415 if (htab->params->pic_fixup > 0)
7416 {
7417 picfixup_size -= relax_info->picfixup_size;
7418 if (picfixup_size != 0)
7419 relax_info->picfixup_size += picfixup_size;
7420 newsize += relax_info->picfixup_size;
7421 }
7422
7423 if (changes != 0 || picfixup_size != 0 || workaround_change)
7424 isec->size = newsize;
7425
7426 if (isymbuf != NULL
7427 && symtab_hdr->contents != (unsigned char *) isymbuf)
7428 {
7429 if (! link_info->keep_memory)
7430 free (isymbuf);
7431 else
7432 {
7433 /* Cache the symbols for elf_link_input_bfd. */
7434 symtab_hdr->contents = (unsigned char *) isymbuf;
7435 }
7436 }
7437
7438 if (contents != NULL
7439 && elf_section_data (isec)->this_hdr.contents != contents)
7440 {
7441 if (!changes && !link_info->keep_memory)
7442 free (contents);
7443 else
7444 {
7445 /* Cache the section contents for elf_link_input_bfd. */
7446 elf_section_data (isec)->this_hdr.contents = contents;
7447 }
7448 }
7449
7450 changes += picfixup_size;
7451 if (changes != 0)
7452 {
7453 /* Append sufficient NOP relocs so we can write out relocation
7454 information for the trampolines. */
7455 Elf_Internal_Shdr *rel_hdr;
7456 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7457 * sizeof (*new_relocs));
7458 unsigned ix;
7459
7460 if (!new_relocs)
7461 goto error_return;
7462 memcpy (new_relocs, internal_relocs,
7463 isec->reloc_count * sizeof (*new_relocs));
7464 for (ix = changes; ix--;)
7465 {
7466 irel = new_relocs + ix + isec->reloc_count;
7467
7468 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7469 }
7470 if (internal_relocs != elf_section_data (isec)->relocs)
7471 free (internal_relocs);
7472 elf_section_data (isec)->relocs = new_relocs;
7473 isec->reloc_count += changes;
7474 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7475 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7476 }
7477 else if (internal_relocs != NULL
7478 && elf_section_data (isec)->relocs != internal_relocs)
7479 free (internal_relocs);
7480
7481 *again = changes != 0 || workaround_change;
7482 return TRUE;
7483
7484 error_return:
7485 while (branch_fixups != NULL)
7486 {
7487 struct one_branch_fixup *f = branch_fixups;
7488 branch_fixups = branch_fixups->next;
7489 free (f);
7490 }
7491 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7492 free (isymbuf);
7493 if (contents != NULL
7494 && elf_section_data (isec)->this_hdr.contents != contents)
7495 free (contents);
7496 if (internal_relocs != NULL
7497 && elf_section_data (isec)->relocs != internal_relocs)
7498 free (internal_relocs);
7499 return FALSE;
7500 }
7501 \f
7502 /* What to do when ld finds relocations against symbols defined in
7503 discarded sections. */
7504
7505 static unsigned int
7506 ppc_elf_action_discarded (asection *sec)
7507 {
7508 if (strcmp (".fixup", sec->name) == 0)
7509 return 0;
7510
7511 if (strcmp (".got2", sec->name) == 0)
7512 return 0;
7513
7514 return _bfd_elf_default_action_discarded (sec);
7515 }
7516 \f
7517 /* Fill in the address for a pointer generated in a linker section. */
7518
7519 static bfd_vma
7520 elf_finish_pointer_linker_section (bfd *input_bfd,
7521 elf_linker_section_t *lsect,
7522 struct elf_link_hash_entry *h,
7523 bfd_vma relocation,
7524 const Elf_Internal_Rela *rel)
7525 {
7526 elf_linker_section_pointers_t *linker_section_ptr;
7527
7528 BFD_ASSERT (lsect != NULL);
7529
7530 if (h != NULL)
7531 {
7532 /* Handle global symbol. */
7533 struct ppc_elf_link_hash_entry *eh;
7534
7535 eh = (struct ppc_elf_link_hash_entry *) h;
7536 BFD_ASSERT (eh->elf.def_regular);
7537 linker_section_ptr = eh->linker_section_pointer;
7538 }
7539 else
7540 {
7541 /* Handle local symbol. */
7542 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7543
7544 BFD_ASSERT (is_ppc_elf (input_bfd));
7545 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7546 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7547 }
7548
7549 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7550 rel->r_addend,
7551 lsect);
7552 BFD_ASSERT (linker_section_ptr != NULL);
7553
7554 /* Offset will always be a multiple of four, so use the bottom bit
7555 as a "written" flag. */
7556 if ((linker_section_ptr->offset & 1) == 0)
7557 {
7558 bfd_put_32 (lsect->section->owner,
7559 relocation + linker_section_ptr->addend,
7560 lsect->section->contents + linker_section_ptr->offset);
7561 linker_section_ptr->offset += 1;
7562 }
7563
7564 relocation = (lsect->section->output_section->vma
7565 + lsect->section->output_offset
7566 + linker_section_ptr->offset - 1
7567 - SYM_VAL (lsect->sym));
7568
7569 #ifdef DEBUG
7570 fprintf (stderr,
7571 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7572 lsect->name, (long) relocation, (long) relocation);
7573 #endif
7574
7575 return relocation;
7576 }
7577
7578 #define PPC_LO(v) ((v) & 0xffff)
7579 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7580 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7581
7582 static void
7583 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7584 struct bfd_link_info *info)
7585 {
7586 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7587 bfd *output_bfd = info->output_bfd;
7588 bfd_vma plt;
7589
7590 plt = ((ent->plt.offset & ~1)
7591 + plt_sec->output_section->vma
7592 + plt_sec->output_offset);
7593
7594 if (bfd_link_pic (info))
7595 {
7596 bfd_vma got = 0;
7597
7598 if (ent->addend >= 32768)
7599 got = (ent->addend
7600 + ent->sec->output_section->vma
7601 + ent->sec->output_offset);
7602 else if (htab->elf.hgot != NULL)
7603 got = SYM_VAL (htab->elf.hgot);
7604
7605 plt -= got;
7606
7607 if (plt + 0x8000 < 0x10000)
7608 {
7609 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7610 p += 4;
7611 bfd_put_32 (output_bfd, MTCTR_11, p);
7612 p += 4;
7613 bfd_put_32 (output_bfd, BCTR, p);
7614 p += 4;
7615 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7616 p += 4;
7617 }
7618 else
7619 {
7620 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7621 p += 4;
7622 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7623 p += 4;
7624 bfd_put_32 (output_bfd, MTCTR_11, p);
7625 p += 4;
7626 bfd_put_32 (output_bfd, BCTR, p);
7627 p += 4;
7628 }
7629 }
7630 else
7631 {
7632 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7633 p += 4;
7634 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7635 p += 4;
7636 bfd_put_32 (output_bfd, MTCTR_11, p);
7637 p += 4;
7638 bfd_put_32 (output_bfd, BCTR, p);
7639 p += 4;
7640 }
7641 }
7642
7643 /* Return true if symbol is defined statically. */
7644
7645 static bfd_boolean
7646 is_static_defined (struct elf_link_hash_entry *h)
7647 {
7648 return ((h->root.type == bfd_link_hash_defined
7649 || h->root.type == bfd_link_hash_defweak)
7650 && h->root.u.def.section != NULL
7651 && h->root.u.def.section->output_section != NULL);
7652 }
7653
7654 /* If INSN is an opcode that may be used with an @tls operand, return
7655 the transformed insn for TLS optimisation, otherwise return 0. If
7656 REG is non-zero only match an insn with RB or RA equal to REG. */
7657
7658 unsigned int
7659 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7660 {
7661 unsigned int rtra;
7662
7663 if ((insn & (0x3f << 26)) != 31 << 26)
7664 return 0;
7665
7666 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7667 rtra = insn & ((1 << 26) - (1 << 16));
7668 else if (((insn >> 16) & 0x1f) == reg)
7669 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7670 else
7671 return 0;
7672
7673 if ((insn & (0x3ff << 1)) == 266 << 1)
7674 /* add -> addi. */
7675 insn = 14 << 26;
7676 else if ((insn & (0x1f << 1)) == 23 << 1
7677 && ((insn & (0x1f << 6)) < 14 << 6
7678 || ((insn & (0x1f << 6)) >= 16 << 6
7679 && (insn & (0x1f << 6)) < 24 << 6)))
7680 /* load and store indexed -> dform. */
7681 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7682 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7683 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7684 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7685 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7686 /* lwax -> lwa. */
7687 insn = (58 << 26) | 2;
7688 else
7689 return 0;
7690 insn |= rtra;
7691 return insn;
7692 }
7693
7694 /* If INSN is an opcode that may be used with an @tprel operand, return
7695 the transformed insn for an undefined weak symbol, ie. with the
7696 thread pointer REG operand removed. Otherwise return 0. */
7697
7698 unsigned int
7699 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7700 {
7701 if ((insn & (0x1f << 16)) == reg << 16
7702 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7703 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7704 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7705 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7706 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7707 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7708 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7709 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7710 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7711 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7712 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7713 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7714 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7715 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7716 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7717 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7718 && (insn & 3) != 1)
7719 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7720 && ((insn & 3) == 0 || (insn & 3) == 3))))
7721 {
7722 insn &= ~(0x1f << 16);
7723 }
7724 else if ((insn & (0x1f << 21)) == reg << 21
7725 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7726 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7727 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7728 {
7729 insn &= ~(0x1f << 21);
7730 insn |= (insn & (0x1f << 16)) << 5;
7731 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7732 insn -= 2 >> 26; /* convert to ori,oris */
7733 }
7734 else
7735 insn = 0;
7736 return insn;
7737 }
7738
7739 static bfd_boolean
7740 is_insn_ds_form (unsigned int insn)
7741 {
7742 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7743 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7744 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7745 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7746 }
7747
7748 static bfd_boolean
7749 is_insn_dq_form (unsigned int insn)
7750 {
7751 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7752 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7753 && (insn & 3) == 1));
7754 }
7755
7756 /* The RELOCATE_SECTION function is called by the ELF backend linker
7757 to handle the relocations for a section.
7758
7759 The relocs are always passed as Rela structures; if the section
7760 actually uses Rel structures, the r_addend field will always be
7761 zero.
7762
7763 This function is responsible for adjust the section contents as
7764 necessary, and (if using Rela relocs and generating a
7765 relocatable output file) adjusting the reloc addend as
7766 necessary.
7767
7768 This function does not have to worry about setting the reloc
7769 address or the reloc symbol index.
7770
7771 LOCAL_SYMS is a pointer to the swapped in local symbols.
7772
7773 LOCAL_SECTIONS is an array giving the section in the input file
7774 corresponding to the st_shndx field of each local symbol.
7775
7776 The global hash table entry for the global symbols can be found
7777 via elf_sym_hashes (input_bfd).
7778
7779 When generating relocatable output, this function must handle
7780 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7781 going to be the section symbol corresponding to the output
7782 section, which means that the addend must be adjusted
7783 accordingly. */
7784
7785 static bfd_boolean
7786 ppc_elf_relocate_section (bfd *output_bfd,
7787 struct bfd_link_info *info,
7788 bfd *input_bfd,
7789 asection *input_section,
7790 bfd_byte *contents,
7791 Elf_Internal_Rela *relocs,
7792 Elf_Internal_Sym *local_syms,
7793 asection **local_sections)
7794 {
7795 Elf_Internal_Shdr *symtab_hdr;
7796 struct elf_link_hash_entry **sym_hashes;
7797 struct ppc_elf_link_hash_table *htab;
7798 Elf_Internal_Rela *rel;
7799 Elf_Internal_Rela *wrel;
7800 Elf_Internal_Rela *relend;
7801 Elf_Internal_Rela outrel;
7802 asection *got2;
7803 bfd_vma *local_got_offsets;
7804 bfd_boolean ret = TRUE;
7805 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7806 bfd_boolean is_vxworks_tls;
7807 unsigned int picfixup_size = 0;
7808 struct ppc_elf_relax_info *relax_info = NULL;
7809
7810 #ifdef DEBUG
7811 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7812 "%ld relocations%s",
7813 input_bfd, input_section,
7814 (long) input_section->reloc_count,
7815 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7816 #endif
7817
7818 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7819
7820 /* Initialize howto table if not already done. */
7821 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7822 ppc_elf_howto_init ();
7823
7824 htab = ppc_elf_hash_table (info);
7825 local_got_offsets = elf_local_got_offsets (input_bfd);
7826 symtab_hdr = &elf_symtab_hdr (input_bfd);
7827 sym_hashes = elf_sym_hashes (input_bfd);
7828 /* We have to handle relocations in vxworks .tls_vars sections
7829 specially, because the dynamic loader is 'weird'. */
7830 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7831 && !strcmp (input_section->output_section->name,
7832 ".tls_vars"));
7833 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7834 relax_info = elf_section_data (input_section)->sec_info;
7835 rel = wrel = relocs;
7836 relend = relocs + input_section->reloc_count;
7837 for (; rel < relend; wrel++, rel++)
7838 {
7839 enum elf_ppc_reloc_type r_type;
7840 bfd_vma addend;
7841 bfd_reloc_status_type r;
7842 Elf_Internal_Sym *sym;
7843 asection *sec;
7844 struct elf_link_hash_entry *h;
7845 const char *sym_name;
7846 reloc_howto_type *howto;
7847 unsigned long r_symndx;
7848 bfd_vma relocation;
7849 bfd_vma branch_bit, from;
7850 bfd_boolean unresolved_reloc;
7851 bfd_boolean warned;
7852 unsigned int tls_type, tls_mask, tls_gd;
7853 struct plt_entry **ifunc;
7854 struct reloc_howto_struct alt_howto;
7855
7856 again:
7857 r_type = ELF32_R_TYPE (rel->r_info);
7858 sym = NULL;
7859 sec = NULL;
7860 h = NULL;
7861 unresolved_reloc = FALSE;
7862 warned = FALSE;
7863 r_symndx = ELF32_R_SYM (rel->r_info);
7864
7865 if (r_symndx < symtab_hdr->sh_info)
7866 {
7867 sym = local_syms + r_symndx;
7868 sec = local_sections[r_symndx];
7869 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7870
7871 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7872 }
7873 else
7874 {
7875 bfd_boolean ignored;
7876
7877 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7878 r_symndx, symtab_hdr, sym_hashes,
7879 h, sec, relocation,
7880 unresolved_reloc, warned, ignored);
7881
7882 sym_name = h->root.root.string;
7883 }
7884
7885 if (sec != NULL && discarded_section (sec))
7886 {
7887 /* For relocs against symbols from removed linkonce sections,
7888 or sections discarded by a linker script, we just want the
7889 section contents zeroed. Avoid any special processing. */
7890 howto = NULL;
7891 if (r_type < R_PPC_max)
7892 howto = ppc_elf_howto_table[r_type];
7893
7894 _bfd_clear_contents (howto, input_bfd, input_section,
7895 contents + rel->r_offset);
7896 wrel->r_offset = rel->r_offset;
7897 wrel->r_info = 0;
7898 wrel->r_addend = 0;
7899
7900 /* For ld -r, remove relocations in debug sections against
7901 sections defined in discarded sections. Not done for
7902 non-debug to preserve relocs in .eh_frame which the
7903 eh_frame editing code expects to be present. */
7904 if (bfd_link_relocatable (info)
7905 && (input_section->flags & SEC_DEBUGGING))
7906 wrel--;
7907
7908 continue;
7909 }
7910
7911 if (bfd_link_relocatable (info))
7912 {
7913 if (got2 != NULL
7914 && r_type == R_PPC_PLTREL24
7915 && rel->r_addend != 0)
7916 {
7917 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7918 addend specifies the GOT pointer offset within .got2. */
7919 rel->r_addend += got2->output_offset;
7920 }
7921 if (r_type != R_PPC_RELAX_PLT
7922 && r_type != R_PPC_RELAX_PLTREL24
7923 && r_type != R_PPC_RELAX)
7924 goto copy_reloc;
7925 }
7926
7927 /* TLS optimizations. Replace instruction sequences and relocs
7928 based on information we collected in tls_optimize. We edit
7929 RELOCS so that --emit-relocs will output something sensible
7930 for the final instruction stream. */
7931 tls_mask = 0;
7932 tls_gd = 0;
7933 if (h != NULL)
7934 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7935 else if (local_got_offsets != NULL)
7936 {
7937 struct plt_entry **local_plt;
7938 char *lgot_masks;
7939 local_plt
7940 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7941 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7942 tls_mask = lgot_masks[r_symndx];
7943 }
7944
7945 /* Ensure reloc mapping code below stays sane. */
7946 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7947 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7948 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7949 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7950 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7951 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7952 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7953 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7954 abort ();
7955 switch (r_type)
7956 {
7957 default:
7958 break;
7959
7960 case R_PPC_GOT_TPREL16:
7961 case R_PPC_GOT_TPREL16_LO:
7962 if ((tls_mask & TLS_TLS) != 0
7963 && (tls_mask & TLS_TPREL) == 0)
7964 {
7965 bfd_vma insn;
7966
7967 insn = bfd_get_32 (output_bfd,
7968 contents + rel->r_offset - d_offset);
7969 insn &= 31 << 21;
7970 insn |= 0x3c020000; /* addis 0,2,0 */
7971 bfd_put_32 (output_bfd, insn,
7972 contents + rel->r_offset - d_offset);
7973 r_type = R_PPC_TPREL16_HA;
7974 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7975 }
7976 break;
7977
7978 case R_PPC_TLS:
7979 if ((tls_mask & TLS_TLS) != 0
7980 && (tls_mask & TLS_TPREL) == 0)
7981 {
7982 bfd_vma insn;
7983
7984 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7985 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7986 if (insn == 0)
7987 abort ();
7988 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7989 r_type = R_PPC_TPREL16_LO;
7990 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7991
7992 /* Was PPC_TLS which sits on insn boundary, now
7993 PPC_TPREL16_LO which is at low-order half-word. */
7994 rel->r_offset += d_offset;
7995 }
7996 break;
7997
7998 case R_PPC_GOT_TLSGD16_HI:
7999 case R_PPC_GOT_TLSGD16_HA:
8000 tls_gd = TLS_TPRELGD;
8001 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8002 goto tls_gdld_hi;
8003 break;
8004
8005 case R_PPC_GOT_TLSLD16_HI:
8006 case R_PPC_GOT_TLSLD16_HA:
8007 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8008 {
8009 tls_gdld_hi:
8010 if ((tls_mask & tls_gd) != 0)
8011 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8012 + R_PPC_GOT_TPREL16);
8013 else
8014 {
8015 rel->r_offset -= d_offset;
8016 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
8017 r_type = R_PPC_NONE;
8018 }
8019 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8020 }
8021 break;
8022
8023 case R_PPC_GOT_TLSGD16:
8024 case R_PPC_GOT_TLSGD16_LO:
8025 tls_gd = TLS_TPRELGD;
8026 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8027 goto tls_ldgd_opt;
8028 break;
8029
8030 case R_PPC_GOT_TLSLD16:
8031 case R_PPC_GOT_TLSLD16_LO:
8032 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8033 {
8034 unsigned int insn1, insn2;
8035 bfd_vma offset;
8036
8037 tls_ldgd_opt:
8038 offset = (bfd_vma) -1;
8039 /* If not using the newer R_PPC_TLSGD/LD to mark
8040 __tls_get_addr calls, we must trust that the call
8041 stays with its arg setup insns, ie. that the next
8042 reloc is the __tls_get_addr call associated with
8043 the current reloc. Edit both insns. */
8044 if (input_section->has_tls_get_addr_call
8045 && rel + 1 < relend
8046 && branch_reloc_hash_match (input_bfd, rel + 1,
8047 htab->tls_get_addr))
8048 offset = rel[1].r_offset;
8049 /* We read the low GOT_TLS insn because we need to keep
8050 the destination reg. It may be something other than
8051 the usual r3, and moved to r3 before the call by
8052 intervening code. */
8053 insn1 = bfd_get_32 (output_bfd,
8054 contents + rel->r_offset - d_offset);
8055 if ((tls_mask & tls_gd) != 0)
8056 {
8057 /* IE */
8058 insn1 &= (0x1f << 21) | (0x1f << 16);
8059 insn1 |= 32 << 26; /* lwz */
8060 if (offset != (bfd_vma) -1)
8061 {
8062 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8063 insn2 = 0x7c631214; /* add 3,3,2 */
8064 bfd_put_32 (output_bfd, insn2, contents + offset);
8065 }
8066 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8067 + R_PPC_GOT_TPREL16);
8068 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8069 }
8070 else
8071 {
8072 /* LE */
8073 insn1 &= 0x1f << 21;
8074 insn1 |= 0x3c020000; /* addis r,2,0 */
8075 if (tls_gd == 0)
8076 {
8077 /* Was an LD reloc. */
8078 for (r_symndx = 0;
8079 r_symndx < symtab_hdr->sh_info;
8080 r_symndx++)
8081 if (local_sections[r_symndx] == sec)
8082 break;
8083 if (r_symndx >= symtab_hdr->sh_info)
8084 r_symndx = STN_UNDEF;
8085 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8086 if (r_symndx != STN_UNDEF)
8087 rel->r_addend -= (local_syms[r_symndx].st_value
8088 + sec->output_offset
8089 + sec->output_section->vma);
8090 }
8091 r_type = R_PPC_TPREL16_HA;
8092 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8093 if (offset != (bfd_vma) -1)
8094 {
8095 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8096 rel[1].r_offset = offset + d_offset;
8097 rel[1].r_addend = rel->r_addend;
8098 insn2 = 0x38630000; /* addi 3,3,0 */
8099 bfd_put_32 (output_bfd, insn2, contents + offset);
8100 }
8101 }
8102 bfd_put_32 (output_bfd, insn1,
8103 contents + rel->r_offset - d_offset);
8104 if (tls_gd == 0)
8105 {
8106 /* We changed the symbol on an LD reloc. Start over
8107 in order to get h, sym, sec etc. right. */
8108 goto again;
8109 }
8110 }
8111 break;
8112
8113 case R_PPC_TLSGD:
8114 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8115 {
8116 unsigned int insn2;
8117 bfd_vma offset = rel->r_offset;
8118
8119 if ((tls_mask & TLS_TPRELGD) != 0)
8120 {
8121 /* IE */
8122 r_type = R_PPC_NONE;
8123 insn2 = 0x7c631214; /* add 3,3,2 */
8124 }
8125 else
8126 {
8127 /* LE */
8128 r_type = R_PPC_TPREL16_LO;
8129 rel->r_offset += d_offset;
8130 insn2 = 0x38630000; /* addi 3,3,0 */
8131 }
8132 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8133 bfd_put_32 (output_bfd, insn2, contents + offset);
8134 /* Zap the reloc on the _tls_get_addr call too. */
8135 BFD_ASSERT (offset == rel[1].r_offset);
8136 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8137 }
8138 break;
8139
8140 case R_PPC_TLSLD:
8141 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8142 {
8143 unsigned int insn2;
8144
8145 for (r_symndx = 0;
8146 r_symndx < symtab_hdr->sh_info;
8147 r_symndx++)
8148 if (local_sections[r_symndx] == sec)
8149 break;
8150 if (r_symndx >= symtab_hdr->sh_info)
8151 r_symndx = STN_UNDEF;
8152 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8153 if (r_symndx != STN_UNDEF)
8154 rel->r_addend -= (local_syms[r_symndx].st_value
8155 + sec->output_offset
8156 + sec->output_section->vma);
8157
8158 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8159 rel->r_offset += d_offset;
8160 insn2 = 0x38630000; /* addi 3,3,0 */
8161 bfd_put_32 (output_bfd, insn2,
8162 contents + rel->r_offset - d_offset);
8163 /* Zap the reloc on the _tls_get_addr call too. */
8164 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8165 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8166 goto again;
8167 }
8168 break;
8169 }
8170
8171 /* Handle other relocations that tweak non-addend part of insn. */
8172 branch_bit = 0;
8173 switch (r_type)
8174 {
8175 default:
8176 break;
8177
8178 /* Branch taken prediction relocations. */
8179 case R_PPC_ADDR14_BRTAKEN:
8180 case R_PPC_REL14_BRTAKEN:
8181 branch_bit = BRANCH_PREDICT_BIT;
8182 /* Fall through. */
8183
8184 /* Branch not taken prediction relocations. */
8185 case R_PPC_ADDR14_BRNTAKEN:
8186 case R_PPC_REL14_BRNTAKEN:
8187 {
8188 bfd_vma insn;
8189
8190 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8191 insn &= ~BRANCH_PREDICT_BIT;
8192 insn |= branch_bit;
8193
8194 from = (rel->r_offset
8195 + input_section->output_offset
8196 + input_section->output_section->vma);
8197
8198 /* Invert 'y' bit if not the default. */
8199 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8200 insn ^= BRANCH_PREDICT_BIT;
8201
8202 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8203 break;
8204 }
8205 }
8206
8207 if (ELIMINATE_COPY_RELOCS
8208 && h != NULL
8209 && !h->def_regular
8210 && h->protected_def
8211 && ppc_elf_hash_entry (h)->has_addr16_ha
8212 && ppc_elf_hash_entry (h)->has_addr16_lo
8213 && htab->params->pic_fixup > 0)
8214 {
8215 /* Convert lis;addi or lis;load/store accessing a protected
8216 variable defined in a shared library to PIC. */
8217 unsigned int insn;
8218
8219 if (r_type == R_PPC_ADDR16_HA)
8220 {
8221 insn = bfd_get_32 (output_bfd,
8222 contents + rel->r_offset - d_offset);
8223 if ((insn & (0x3f << 26)) == (15u << 26)
8224 && (insn & (0x1f << 16)) == 0 /* lis */)
8225 {
8226 bfd_byte *p;
8227 bfd_vma off;
8228 bfd_vma got_addr;
8229
8230 p = (contents + input_section->size
8231 - relax_info->workaround_size
8232 - relax_info->picfixup_size
8233 + picfixup_size);
8234 off = (p - contents) - (rel->r_offset - d_offset);
8235 if (off > 0x1fffffc || (off & 3) != 0)
8236 info->callbacks->einfo
8237 (_("%P: %H: fixup branch overflow\n"),
8238 input_bfd, input_section, rel->r_offset);
8239
8240 bfd_put_32 (output_bfd, B | off,
8241 contents + rel->r_offset - d_offset);
8242 got_addr = (htab->got->output_section->vma
8243 + htab->got->output_offset
8244 + (h->got.offset & ~1));
8245 wrel->r_offset = (p - contents) + d_offset;
8246 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8247 wrel->r_addend = got_addr;
8248 insn &= ~0xffff;
8249 insn |= ((unsigned int )(got_addr + 0x8000) >> 16) & 0xffff;
8250 bfd_put_32 (output_bfd, insn, p);
8251
8252 /* Convert lis to lwz, loading address from GOT. */
8253 insn &= ~0xffff;
8254 insn ^= (32u ^ 15u) << 26;
8255 insn |= (insn & (0x1f << 21)) >> 5;
8256 insn |= got_addr & 0xffff;
8257 bfd_put_32 (output_bfd, insn, p + 4);
8258
8259 bfd_put_32 (output_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8260 picfixup_size += 12;
8261
8262 /* Use one of the spare relocs, so --emit-relocs
8263 output is reasonable. */
8264 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8265 wrel++, rel++;
8266 rel->r_offset = wrel[-1].r_offset + 4;
8267 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8268 rel->r_addend = wrel[-1].r_addend;
8269
8270 /* Continue on as if we had a got reloc, to output
8271 dynamic reloc. */
8272 r_type = R_PPC_GOT16_LO;
8273 }
8274 else
8275 info->callbacks->einfo
8276 /* xgettext:c-format */
8277 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8278 input_bfd, input_section, rel->r_offset,
8279 "R_PPC_ADDR16_HA", insn);
8280 }
8281 else if (r_type == R_PPC_ADDR16_LO)
8282 {
8283 insn = bfd_get_32 (output_bfd,
8284 contents + rel->r_offset - d_offset);
8285 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8286 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8287 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8288 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8289 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8290 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8291 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8292 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8293 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8294 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8295 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8296 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8297 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8298 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8299 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8300 && (insn & 3) != 1)
8301 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8302 && ((insn & 3) == 0 || (insn & 3) == 3)))
8303 {
8304 /* Arrange to apply the reloc addend, if any. */
8305 relocation = 0;
8306 unresolved_reloc = FALSE;
8307 rel->r_info = ELF32_R_INFO (0, r_type);
8308 }
8309 else
8310 info->callbacks->einfo
8311 /* xgettext:c-format */
8312 (_("%P: %H: error: %s with unexpected instruction %x\n"),
8313 input_bfd, input_section, rel->r_offset,
8314 "R_PPC_ADDR16_LO", insn);
8315 }
8316 }
8317
8318 ifunc = NULL;
8319 if (!htab->is_vxworks)
8320 {
8321 struct plt_entry *ent;
8322
8323 if (h != NULL)
8324 {
8325 if (h->type == STT_GNU_IFUNC)
8326 ifunc = &h->plt.plist;
8327 }
8328 else if (local_got_offsets != NULL
8329 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8330 {
8331 struct plt_entry **local_plt;
8332
8333 local_plt = (struct plt_entry **) (local_got_offsets
8334 + symtab_hdr->sh_info);
8335 ifunc = local_plt + r_symndx;
8336 }
8337
8338 ent = NULL;
8339 if (ifunc != NULL
8340 && (!bfd_link_pic (info)
8341 || is_branch_reloc (r_type)))
8342 {
8343 addend = 0;
8344 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8345 addend = rel->r_addend;
8346 ent = find_plt_ent (ifunc, got2, addend);
8347 }
8348 if (ent != NULL)
8349 {
8350 if (bfd_link_pic (info)
8351 && ent->sec != got2
8352 && htab->plt_type != PLT_NEW
8353 && (!htab->elf.dynamic_sections_created
8354 || h == NULL
8355 || h->dynindx == -1))
8356 {
8357 /* Uh oh, we are going to create a pic glink stub
8358 for an ifunc (here for h == NULL and later in
8359 finish_dynamic_symbol for h != NULL), and
8360 apparently are using code compiled with
8361 -mbss-plt. The difficulty is that -mbss-plt code
8362 gives no indication via a magic PLTREL24 addend
8363 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8364 is pointing into a .got2 section (and how far
8365 into .got2). */
8366 info->callbacks->einfo
8367 /* xgettext:c-format */
8368 (_("%X%P: %H: unsupported bss-plt -fPIC ifunc %s\n"),
8369 input_bfd, input_section, rel->r_offset, sym_name);
8370 }
8371 if (h == NULL && (ent->plt.offset & 1) == 0)
8372 {
8373 Elf_Internal_Rela rela;
8374 bfd_byte *loc;
8375
8376 rela.r_offset = (htab->iplt->output_section->vma
8377 + htab->iplt->output_offset
8378 + ent->plt.offset);
8379 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8380 rela.r_addend = relocation;
8381 loc = htab->reliplt->contents;
8382 loc += (htab->reliplt->reloc_count++
8383 * sizeof (Elf32_External_Rela));
8384 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8385
8386 ent->plt.offset |= 1;
8387 }
8388 if (h == NULL && (ent->glink_offset & 1) == 0)
8389 {
8390 unsigned char *p = ((unsigned char *) htab->glink->contents
8391 + ent->glink_offset);
8392 write_glink_stub (ent, htab->iplt, p, info);
8393 ent->glink_offset |= 1;
8394 }
8395
8396 unresolved_reloc = FALSE;
8397 if (htab->plt_type == PLT_NEW
8398 || !htab->elf.dynamic_sections_created
8399 || h == NULL
8400 || h->dynindx == -1)
8401 relocation = (htab->glink->output_section->vma
8402 + htab->glink->output_offset
8403 + (ent->glink_offset & ~1));
8404 else
8405 relocation = (htab->plt->output_section->vma
8406 + htab->plt->output_offset
8407 + ent->plt.offset);
8408 }
8409 }
8410
8411 addend = rel->r_addend;
8412 tls_type = 0;
8413 howto = NULL;
8414 if (r_type < R_PPC_max)
8415 howto = ppc_elf_howto_table[r_type];
8416 switch (r_type)
8417 {
8418 default:
8419 info->callbacks->einfo
8420 /* xgettext:c-format */
8421 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8422 input_bfd, (int) r_type, sym_name);
8423
8424 bfd_set_error (bfd_error_bad_value);
8425 ret = FALSE;
8426 goto copy_reloc;
8427
8428 case R_PPC_NONE:
8429 case R_PPC_TLS:
8430 case R_PPC_TLSGD:
8431 case R_PPC_TLSLD:
8432 case R_PPC_EMB_MRKREF:
8433 case R_PPC_GNU_VTINHERIT:
8434 case R_PPC_GNU_VTENTRY:
8435 goto copy_reloc;
8436
8437 /* GOT16 relocations. Like an ADDR16 using the symbol's
8438 address in the GOT as relocation value instead of the
8439 symbol's value itself. Also, create a GOT entry for the
8440 symbol and put the symbol value there. */
8441 case R_PPC_GOT_TLSGD16:
8442 case R_PPC_GOT_TLSGD16_LO:
8443 case R_PPC_GOT_TLSGD16_HI:
8444 case R_PPC_GOT_TLSGD16_HA:
8445 tls_type = TLS_TLS | TLS_GD;
8446 goto dogot;
8447
8448 case R_PPC_GOT_TLSLD16:
8449 case R_PPC_GOT_TLSLD16_LO:
8450 case R_PPC_GOT_TLSLD16_HI:
8451 case R_PPC_GOT_TLSLD16_HA:
8452 tls_type = TLS_TLS | TLS_LD;
8453 goto dogot;
8454
8455 case R_PPC_GOT_TPREL16:
8456 case R_PPC_GOT_TPREL16_LO:
8457 case R_PPC_GOT_TPREL16_HI:
8458 case R_PPC_GOT_TPREL16_HA:
8459 tls_type = TLS_TLS | TLS_TPREL;
8460 goto dogot;
8461
8462 case R_PPC_GOT_DTPREL16:
8463 case R_PPC_GOT_DTPREL16_LO:
8464 case R_PPC_GOT_DTPREL16_HI:
8465 case R_PPC_GOT_DTPREL16_HA:
8466 tls_type = TLS_TLS | TLS_DTPREL;
8467 goto dogot;
8468
8469 case R_PPC_GOT16:
8470 case R_PPC_GOT16_LO:
8471 case R_PPC_GOT16_HI:
8472 case R_PPC_GOT16_HA:
8473 tls_mask = 0;
8474 dogot:
8475 {
8476 /* Relocation is to the entry for this symbol in the global
8477 offset table. */
8478 bfd_vma off;
8479 bfd_vma *offp;
8480 unsigned long indx;
8481
8482 if (htab->got == NULL)
8483 abort ();
8484
8485 indx = 0;
8486 if (tls_type == (TLS_TLS | TLS_LD)
8487 && (h == NULL
8488 || !h->def_dynamic))
8489 offp = &htab->tlsld_got.offset;
8490 else if (h != NULL)
8491 {
8492 bfd_boolean dyn;
8493 dyn = htab->elf.dynamic_sections_created;
8494 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
8495 || (bfd_link_pic (info)
8496 && SYMBOL_REFERENCES_LOCAL (info, h)))
8497 /* This is actually a static link, or it is a
8498 -Bsymbolic link and the symbol is defined
8499 locally, or the symbol was forced to be local
8500 because of a version file. */
8501 ;
8502 else
8503 {
8504 BFD_ASSERT (h->dynindx != -1);
8505 indx = h->dynindx;
8506 unresolved_reloc = FALSE;
8507 }
8508 offp = &h->got.offset;
8509 }
8510 else
8511 {
8512 if (local_got_offsets == NULL)
8513 abort ();
8514 offp = &local_got_offsets[r_symndx];
8515 }
8516
8517 /* The offset must always be a multiple of 4. We use the
8518 least significant bit to record whether we have already
8519 processed this entry. */
8520 off = *offp;
8521 if ((off & 1) != 0)
8522 off &= ~1;
8523 else
8524 {
8525 unsigned int tls_m = (tls_mask
8526 & (TLS_LD | TLS_GD | TLS_DTPREL
8527 | TLS_TPREL | TLS_TPRELGD));
8528
8529 if (offp == &htab->tlsld_got.offset)
8530 tls_m = TLS_LD;
8531 else if (h == NULL
8532 || !h->def_dynamic)
8533 tls_m &= ~TLS_LD;
8534
8535 /* We might have multiple got entries for this sym.
8536 Initialize them all. */
8537 do
8538 {
8539 int tls_ty = 0;
8540
8541 if ((tls_m & TLS_LD) != 0)
8542 {
8543 tls_ty = TLS_TLS | TLS_LD;
8544 tls_m &= ~TLS_LD;
8545 }
8546 else if ((tls_m & TLS_GD) != 0)
8547 {
8548 tls_ty = TLS_TLS | TLS_GD;
8549 tls_m &= ~TLS_GD;
8550 }
8551 else if ((tls_m & TLS_DTPREL) != 0)
8552 {
8553 tls_ty = TLS_TLS | TLS_DTPREL;
8554 tls_m &= ~TLS_DTPREL;
8555 }
8556 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8557 {
8558 tls_ty = TLS_TLS | TLS_TPREL;
8559 tls_m = 0;
8560 }
8561
8562 /* Generate relocs for the dynamic linker. */
8563 if ((bfd_link_pic (info) || indx != 0)
8564 && (offp == &htab->tlsld_got.offset
8565 || h == NULL
8566 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8567 || h->root.type != bfd_link_hash_undefweak))
8568 {
8569 asection *rsec = htab->relgot;
8570 bfd_byte * loc;
8571
8572 if (ifunc != NULL)
8573 rsec = htab->reliplt;
8574 outrel.r_offset = (htab->got->output_section->vma
8575 + htab->got->output_offset
8576 + off);
8577 outrel.r_addend = 0;
8578 if (tls_ty & (TLS_LD | TLS_GD))
8579 {
8580 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8581 if (tls_ty == (TLS_TLS | TLS_GD))
8582 {
8583 loc = rsec->contents;
8584 loc += (rsec->reloc_count++
8585 * sizeof (Elf32_External_Rela));
8586 bfd_elf32_swap_reloca_out (output_bfd,
8587 &outrel, loc);
8588 outrel.r_offset += 4;
8589 outrel.r_info
8590 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8591 }
8592 }
8593 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8594 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8595 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8596 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8597 else if (indx != 0)
8598 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8599 else if (ifunc != NULL)
8600 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8601 else
8602 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8603 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8604 {
8605 outrel.r_addend += relocation;
8606 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8607 {
8608 if (htab->elf.tls_sec == NULL)
8609 outrel.r_addend = 0;
8610 else
8611 outrel.r_addend -= htab->elf.tls_sec->vma;
8612 }
8613 }
8614 loc = rsec->contents;
8615 loc += (rsec->reloc_count++
8616 * sizeof (Elf32_External_Rela));
8617 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8618 }
8619
8620 /* Init the .got section contents if we're not
8621 emitting a reloc. */
8622 else
8623 {
8624 bfd_vma value = relocation;
8625
8626 if (tls_ty == (TLS_TLS | TLS_LD))
8627 value = 1;
8628 else if (tls_ty != 0)
8629 {
8630 if (htab->elf.tls_sec == NULL)
8631 value = 0;
8632 else
8633 {
8634 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8635 if (tls_ty == (TLS_TLS | TLS_TPREL))
8636 value += DTP_OFFSET - TP_OFFSET;
8637 }
8638
8639 if (tls_ty == (TLS_TLS | TLS_GD))
8640 {
8641 bfd_put_32 (output_bfd, value,
8642 htab->got->contents + off + 4);
8643 value = 1;
8644 }
8645 }
8646 bfd_put_32 (output_bfd, value,
8647 htab->got->contents + off);
8648 }
8649
8650 off += 4;
8651 if (tls_ty & (TLS_LD | TLS_GD))
8652 off += 4;
8653 }
8654 while (tls_m != 0);
8655
8656 off = *offp;
8657 *offp = off | 1;
8658 }
8659
8660 if (off >= (bfd_vma) -2)
8661 abort ();
8662
8663 if ((tls_type & TLS_TLS) != 0)
8664 {
8665 if (tls_type != (TLS_TLS | TLS_LD))
8666 {
8667 if ((tls_mask & TLS_LD) != 0
8668 && !(h == NULL
8669 || !h->def_dynamic))
8670 off += 8;
8671 if (tls_type != (TLS_TLS | TLS_GD))
8672 {
8673 if ((tls_mask & TLS_GD) != 0)
8674 off += 8;
8675 if (tls_type != (TLS_TLS | TLS_DTPREL))
8676 {
8677 if ((tls_mask & TLS_DTPREL) != 0)
8678 off += 4;
8679 }
8680 }
8681 }
8682 }
8683
8684 /* If here for a picfixup, we're done. */
8685 if (r_type != ELF32_R_TYPE (rel->r_info))
8686 goto copy_reloc;
8687
8688 relocation = (htab->got->output_section->vma
8689 + htab->got->output_offset
8690 + off
8691 - SYM_VAL (htab->elf.hgot));
8692
8693 /* Addends on got relocations don't make much sense.
8694 x+off@got is actually x@got+off, and since the got is
8695 generated by a hash table traversal, the value in the
8696 got at entry m+n bears little relation to the entry m. */
8697 if (addend != 0)
8698 info->callbacks->einfo
8699 /* xgettext:c-format */
8700 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8701 input_bfd, input_section, rel->r_offset,
8702 howto->name,
8703 sym_name);
8704 }
8705 break;
8706
8707 /* Relocations that need no special processing. */
8708 case R_PPC_LOCAL24PC:
8709 /* It makes no sense to point a local relocation
8710 at a symbol not in this object. */
8711 if (unresolved_reloc)
8712 {
8713 (*info->callbacks->undefined_symbol) (info,
8714 h->root.root.string,
8715 input_bfd,
8716 input_section,
8717 rel->r_offset,
8718 TRUE);
8719 goto copy_reloc;
8720 }
8721 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8722 {
8723 /* @local on an ifunc does not really make sense since
8724 the ifunc resolver can take you anywhere. More
8725 seriously, calls to ifuncs must go through a plt call
8726 stub, and for pic the plt call stubs uses r30 to
8727 access the PLT. The problem is that a call that is
8728 local won't have the +32k reloc addend trick marking
8729 -fPIC code, so the linker won't know whether r30 is
8730 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8731 /* xgettext:c-format */
8732 info->callbacks->einfo (_("%X%P: %H: @local call to ifunc %s\n"),
8733 input_bfd, input_section, rel->r_offset,
8734 h->root.root.string);
8735 }
8736 break;
8737
8738 case R_PPC_DTPREL16:
8739 case R_PPC_DTPREL16_LO:
8740 case R_PPC_DTPREL16_HI:
8741 case R_PPC_DTPREL16_HA:
8742 if (htab->elf.tls_sec != NULL)
8743 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8744 break;
8745
8746 /* Relocations that may need to be propagated if this is a shared
8747 object. */
8748 case R_PPC_TPREL16:
8749 case R_PPC_TPREL16_LO:
8750 case R_PPC_TPREL16_HI:
8751 case R_PPC_TPREL16_HA:
8752 if (h != NULL
8753 && h->root.type == bfd_link_hash_undefweak
8754 && h->dynindx == -1)
8755 {
8756 /* Make this relocation against an undefined weak symbol
8757 resolve to zero. This is really just a tweak, since
8758 code using weak externs ought to check that they are
8759 defined before using them. */
8760 bfd_byte *p = contents + rel->r_offset - d_offset;
8761 unsigned int insn = bfd_get_32 (output_bfd, p);
8762 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8763 if (insn != 0)
8764 bfd_put_32 (output_bfd, insn, p);
8765 break;
8766 }
8767 if (htab->elf.tls_sec != NULL)
8768 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8769 /* The TPREL16 relocs shouldn't really be used in shared
8770 libs as they will result in DT_TEXTREL being set, but
8771 support them anyway. */
8772 goto dodyn;
8773
8774 case R_PPC_TPREL32:
8775 if (htab->elf.tls_sec != NULL)
8776 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8777 goto dodyn;
8778
8779 case R_PPC_DTPREL32:
8780 if (htab->elf.tls_sec != NULL)
8781 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8782 goto dodyn;
8783
8784 case R_PPC_DTPMOD32:
8785 relocation = 1;
8786 addend = 0;
8787 goto dodyn;
8788
8789 case R_PPC_REL16:
8790 case R_PPC_REL16_LO:
8791 case R_PPC_REL16_HI:
8792 case R_PPC_REL16_HA:
8793 case R_PPC_REL16DX_HA:
8794 break;
8795
8796 case R_PPC_REL32:
8797 if (h == NULL || h == htab->elf.hgot)
8798 break;
8799 /* fall through */
8800
8801 case R_PPC_ADDR32:
8802 case R_PPC_ADDR16:
8803 case R_PPC_ADDR16_LO:
8804 case R_PPC_ADDR16_HI:
8805 case R_PPC_ADDR16_HA:
8806 case R_PPC_UADDR32:
8807 case R_PPC_UADDR16:
8808 goto dodyn;
8809
8810 case R_PPC_VLE_REL8:
8811 case R_PPC_VLE_REL15:
8812 case R_PPC_VLE_REL24:
8813 case R_PPC_REL24:
8814 case R_PPC_REL14:
8815 case R_PPC_REL14_BRTAKEN:
8816 case R_PPC_REL14_BRNTAKEN:
8817 /* If these relocations are not to a named symbol, they can be
8818 handled right here, no need to bother the dynamic linker. */
8819 if (SYMBOL_CALLS_LOCAL (info, h)
8820 || h == htab->elf.hgot)
8821 break;
8822 /* fall through */
8823
8824 case R_PPC_ADDR24:
8825 case R_PPC_ADDR14:
8826 case R_PPC_ADDR14_BRTAKEN:
8827 case R_PPC_ADDR14_BRNTAKEN:
8828 if (h != NULL && !bfd_link_pic (info))
8829 break;
8830 /* fall through */
8831
8832 dodyn:
8833 if ((input_section->flags & SEC_ALLOC) == 0
8834 || is_vxworks_tls)
8835 break;
8836
8837 if ((bfd_link_pic (info)
8838 && !(h != NULL
8839 && ((h->root.type == bfd_link_hash_undefined
8840 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8841 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8842 || (h->root.type == bfd_link_hash_undefweak
8843 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8844 && (must_be_dyn_reloc (info, r_type)
8845 || !SYMBOL_CALLS_LOCAL (info, h)))
8846 || (ELIMINATE_COPY_RELOCS
8847 && !bfd_link_pic (info)
8848 && h != NULL
8849 && h->dynindx != -1
8850 && !h->non_got_ref
8851 && !h->def_regular
8852 && !(h->protected_def
8853 && ppc_elf_hash_entry (h)->has_addr16_ha
8854 && ppc_elf_hash_entry (h)->has_addr16_lo
8855 && htab->params->pic_fixup > 0)))
8856 {
8857 int skip;
8858 bfd_byte *loc;
8859 asection *sreloc;
8860 #ifdef DEBUG
8861 fprintf (stderr, "ppc_elf_relocate_section needs to "
8862 "create relocation for %s\n",
8863 (h && h->root.root.string
8864 ? h->root.root.string : "<unknown>"));
8865 #endif
8866
8867 /* When generating a shared object, these relocations
8868 are copied into the output file to be resolved at run
8869 time. */
8870 sreloc = elf_section_data (input_section)->sreloc;
8871 if (ifunc)
8872 sreloc = htab->reliplt;
8873 if (sreloc == NULL)
8874 return FALSE;
8875
8876 skip = 0;
8877 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8878 input_section,
8879 rel->r_offset);
8880 if (outrel.r_offset == (bfd_vma) -1
8881 || outrel.r_offset == (bfd_vma) -2)
8882 skip = (int) outrel.r_offset;
8883 outrel.r_offset += (input_section->output_section->vma
8884 + input_section->output_offset);
8885
8886 if (skip)
8887 memset (&outrel, 0, sizeof outrel);
8888 else if ((h != NULL
8889 && (h->root.type == bfd_link_hash_undefined
8890 || h->root.type == bfd_link_hash_undefweak))
8891 || !SYMBOL_REFERENCES_LOCAL (info, h))
8892 {
8893 BFD_ASSERT (h->dynindx != -1);
8894 unresolved_reloc = FALSE;
8895 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8896 outrel.r_addend = rel->r_addend;
8897 }
8898 else
8899 {
8900 outrel.r_addend = relocation + rel->r_addend;
8901
8902 if (r_type != R_PPC_ADDR32)
8903 {
8904 long indx = 0;
8905
8906 if (ifunc != NULL)
8907 {
8908 /* If we get here when building a static
8909 executable, then the libc startup function
8910 responsible for applying indirect function
8911 relocations is going to complain about
8912 the reloc type.
8913 If we get here when building a dynamic
8914 executable, it will be because we have
8915 a text relocation. The dynamic loader
8916 will set the text segment writable and
8917 non-executable to apply text relocations.
8918 So we'll segfault when trying to run the
8919 indirection function to resolve the reloc. */
8920 info->callbacks->einfo
8921 /* xgettext:c-format */
8922 (_("%P: %H: relocation %s for indirect "
8923 "function %s unsupported\n"),
8924 input_bfd, input_section, rel->r_offset,
8925 howto->name,
8926 sym_name);
8927 ret = FALSE;
8928 }
8929 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8930 ;
8931 else if (sec == NULL || sec->owner == NULL)
8932 {
8933 bfd_set_error (bfd_error_bad_value);
8934 ret = FALSE;
8935 }
8936 else
8937 {
8938 asection *osec;
8939
8940 /* We are turning this relocation into one
8941 against a section symbol. It would be
8942 proper to subtract the symbol's value,
8943 osec->vma, from the emitted reloc addend,
8944 but ld.so expects buggy relocs.
8945 FIXME: Why not always use a zero index? */
8946 osec = sec->output_section;
8947 indx = elf_section_data (osec)->dynindx;
8948 if (indx == 0)
8949 {
8950 osec = htab->elf.text_index_section;
8951 indx = elf_section_data (osec)->dynindx;
8952 }
8953 BFD_ASSERT (indx != 0);
8954 #ifdef DEBUG
8955 if (indx == 0)
8956 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8957 indx, osec->name, osec->flags,
8958 h->root.root.string);
8959 #endif
8960 }
8961
8962 outrel.r_info = ELF32_R_INFO (indx, r_type);
8963 }
8964 else if (ifunc != NULL)
8965 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8966 else
8967 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8968 }
8969
8970 loc = sreloc->contents;
8971 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8972 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8973
8974 if (skip == -1)
8975 goto copy_reloc;
8976
8977 /* This reloc will be computed at runtime. We clear the memory
8978 so that it contains predictable value. */
8979 if (! skip
8980 && ((input_section->flags & SEC_ALLOC) != 0
8981 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8982 {
8983 relocation = howto->pc_relative ? outrel.r_offset : 0;
8984 addend = 0;
8985 break;
8986 }
8987 }
8988 break;
8989
8990 case R_PPC_RELAX_PLT:
8991 case R_PPC_RELAX_PLTREL24:
8992 if (h != NULL)
8993 {
8994 struct plt_entry *ent;
8995 bfd_vma got2_addend = 0;
8996
8997 if (r_type == R_PPC_RELAX_PLTREL24)
8998 {
8999 if (bfd_link_pic (info))
9000 got2_addend = addend;
9001 addend = 0;
9002 }
9003 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9004 if (htab->plt_type == PLT_NEW)
9005 relocation = (htab->glink->output_section->vma
9006 + htab->glink->output_offset
9007 + ent->glink_offset);
9008 else
9009 relocation = (htab->plt->output_section->vma
9010 + htab->plt->output_offset
9011 + ent->plt.offset);
9012 }
9013 /* Fall through. */
9014
9015 case R_PPC_RELAX:
9016 {
9017 const int *stub;
9018 size_t size;
9019 size_t insn_offset = rel->r_offset;
9020 unsigned int insn;
9021
9022 if (bfd_link_pic (info))
9023 {
9024 relocation -= (input_section->output_section->vma
9025 + input_section->output_offset
9026 + rel->r_offset - 4);
9027 stub = shared_stub_entry;
9028 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
9029 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
9030 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
9031 stub += 3;
9032 size = ARRAY_SIZE (shared_stub_entry) - 3;
9033 }
9034 else
9035 {
9036 stub = stub_entry;
9037 size = ARRAY_SIZE (stub_entry);
9038 }
9039
9040 relocation += addend;
9041 if (bfd_link_relocatable (info))
9042 relocation = 0;
9043
9044 /* First insn is HA, second is LO. */
9045 insn = *stub++;
9046 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9047 bfd_put_32 (output_bfd, insn, contents + insn_offset);
9048 insn_offset += 4;
9049
9050 insn = *stub++;
9051 insn |= relocation & 0xffff;
9052 bfd_put_32 (output_bfd, insn, contents + insn_offset);
9053 insn_offset += 4;
9054 size -= 2;
9055
9056 while (size != 0)
9057 {
9058 insn = *stub++;
9059 --size;
9060 bfd_put_32 (output_bfd, insn, contents + insn_offset);
9061 insn_offset += 4;
9062 }
9063
9064 /* Rewrite the reloc and convert one of the trailing nop
9065 relocs to describe this relocation. */
9066 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9067 /* The relocs are at the bottom 2 bytes */
9068 wrel->r_offset = rel->r_offset + d_offset;
9069 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9070 wrel->r_addend = rel->r_addend;
9071 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9072 wrel++, rel++;
9073 wrel->r_offset += 4;
9074 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9075 }
9076 continue;
9077
9078 /* Indirect .sdata relocation. */
9079 case R_PPC_EMB_SDAI16:
9080 BFD_ASSERT (htab->sdata[0].section != NULL);
9081 if (!is_static_defined (htab->sdata[0].sym))
9082 {
9083 unresolved_reloc = TRUE;
9084 break;
9085 }
9086 relocation
9087 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9088 h, relocation, rel);
9089 addend = 0;
9090 break;
9091
9092 /* Indirect .sdata2 relocation. */
9093 case R_PPC_EMB_SDA2I16:
9094 BFD_ASSERT (htab->sdata[1].section != NULL);
9095 if (!is_static_defined (htab->sdata[1].sym))
9096 {
9097 unresolved_reloc = TRUE;
9098 break;
9099 }
9100 relocation
9101 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9102 h, relocation, rel);
9103 addend = 0;
9104 break;
9105
9106 /* Handle the TOC16 reloc. We want to use the offset within the .got
9107 section, not the actual VMA. This is appropriate when generating
9108 an embedded ELF object, for which the .got section acts like the
9109 AIX .toc section. */
9110 case R_PPC_TOC16: /* phony GOT16 relocations */
9111 if (sec == NULL || sec->output_section == NULL)
9112 {
9113 unresolved_reloc = TRUE;
9114 break;
9115 }
9116 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9117 ".got") == 0
9118 || strcmp (bfd_get_section_name (sec->owner, sec),
9119 ".cgot") == 0);
9120
9121 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9122 break;
9123
9124 case R_PPC_PLTREL24:
9125 if (h != NULL && ifunc == NULL)
9126 {
9127 struct plt_entry *ent;
9128
9129 ent = find_plt_ent (&h->plt.plist, got2,
9130 bfd_link_pic (info) ? addend : 0);
9131 if (ent == NULL
9132 || htab->plt == NULL)
9133 {
9134 /* We didn't make a PLT entry for this symbol. This
9135 happens when statically linking PIC code, or when
9136 using -Bsymbolic. */
9137 }
9138 else
9139 {
9140 /* Relocation is to the entry for this symbol in the
9141 procedure linkage table. */
9142 unresolved_reloc = FALSE;
9143 if (htab->plt_type == PLT_NEW)
9144 relocation = (htab->glink->output_section->vma
9145 + htab->glink->output_offset
9146 + ent->glink_offset);
9147 else
9148 relocation = (htab->plt->output_section->vma
9149 + htab->plt->output_offset
9150 + ent->plt.offset);
9151 }
9152 }
9153
9154 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9155 addend specifies the GOT pointer offset within .got2.
9156 Don't apply it to the relocation field. */
9157 addend = 0;
9158 break;
9159
9160 /* Relocate against _SDA_BASE_. */
9161 case R_PPC_SDAREL16:
9162 {
9163 const char *name;
9164 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9165
9166 if (sec == NULL
9167 || sec->output_section == NULL
9168 || !is_static_defined (sda))
9169 {
9170 unresolved_reloc = TRUE;
9171 break;
9172 }
9173 addend -= SYM_VAL (sda);
9174
9175 name = bfd_get_section_name (output_bfd, sec->output_section);
9176 if (!(strcmp (name, ".sdata") == 0
9177 || strcmp (name, ".sbss") == 0))
9178 {
9179 info->callbacks->einfo
9180 /* xgettext:c-format */
9181 (_("%P: %B: the target (%s) of a %s relocation is "
9182 "in the wrong output section (%s)\n"),
9183 input_bfd,
9184 sym_name,
9185 howto->name,
9186 name);
9187 }
9188 }
9189 break;
9190
9191 /* Relocate against _SDA2_BASE_. */
9192 case R_PPC_EMB_SDA2REL:
9193 {
9194 const char *name;
9195 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9196
9197 if (sec == NULL
9198 || sec->output_section == NULL
9199 || !is_static_defined (sda))
9200 {
9201 unresolved_reloc = TRUE;
9202 break;
9203 }
9204 addend -= SYM_VAL (sda);
9205
9206 name = bfd_get_section_name (output_bfd, sec->output_section);
9207 if (!(strcmp (name, ".sdata2") == 0
9208 || strcmp (name, ".sbss2") == 0))
9209 {
9210 info->callbacks->einfo
9211 /* xgettext:c-format */
9212 (_("%P: %B: the target (%s) of a %s relocation is "
9213 "in the wrong output section (%s)\n"),
9214 input_bfd,
9215 sym_name,
9216 howto->name,
9217 name);
9218 }
9219 }
9220 break;
9221
9222 case R_PPC_VLE_LO16A:
9223 relocation = relocation + addend;
9224 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9225 relocation, split16a_type);
9226 goto copy_reloc;
9227
9228 case R_PPC_VLE_LO16D:
9229 relocation = relocation + addend;
9230 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9231 relocation, split16d_type);
9232 goto copy_reloc;
9233
9234 case R_PPC_VLE_HI16A:
9235 relocation = (relocation + addend) >> 16;
9236 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9237 relocation, split16a_type);
9238 goto copy_reloc;
9239
9240 case R_PPC_VLE_HI16D:
9241 relocation = (relocation + addend) >> 16;
9242 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9243 relocation, split16d_type);
9244 goto copy_reloc;
9245
9246 case R_PPC_VLE_HA16A:
9247 relocation = (relocation + addend + 0x8000) >> 16;
9248 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9249 relocation, split16a_type);
9250 goto copy_reloc;
9251
9252 case R_PPC_VLE_HA16D:
9253 relocation = (relocation + addend + 0x8000) >> 16;
9254 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9255 relocation, split16d_type);
9256 goto copy_reloc;
9257
9258 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9259 case R_PPC_EMB_SDA21:
9260 case R_PPC_VLE_SDA21:
9261 case R_PPC_EMB_RELSDA:
9262 case R_PPC_VLE_SDA21_LO:
9263 {
9264 const char *name;
9265 int reg;
9266 unsigned int insn;
9267 struct elf_link_hash_entry *sda = NULL;
9268
9269 if (sec == NULL || sec->output_section == NULL)
9270 {
9271 unresolved_reloc = TRUE;
9272 break;
9273 }
9274
9275 name = bfd_get_section_name (output_bfd, sec->output_section);
9276 if (strcmp (name, ".sdata") == 0
9277 || strcmp (name, ".sbss") == 0)
9278 {
9279 reg = 13;
9280 sda = htab->sdata[0].sym;
9281 }
9282 else if (strcmp (name, ".sdata2") == 0
9283 || strcmp (name, ".sbss2") == 0)
9284 {
9285 reg = 2;
9286 sda = htab->sdata[1].sym;
9287 }
9288 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9289 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9290 {
9291 reg = 0;
9292 }
9293 else
9294 {
9295 info->callbacks->einfo
9296 /* xgettext:c-format */
9297 (_("%P: %B: the target (%s) of a %s relocation is "
9298 "in the wrong output section (%s)\n"),
9299 input_bfd,
9300 sym_name,
9301 howto->name,
9302 name);
9303
9304 bfd_set_error (bfd_error_bad_value);
9305 ret = FALSE;
9306 goto copy_reloc;
9307 }
9308
9309 if (sda != NULL)
9310 {
9311 if (!is_static_defined (sda))
9312 {
9313 unresolved_reloc = TRUE;
9314 break;
9315 }
9316 addend -= SYM_VAL (sda);
9317 }
9318
9319 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
9320 if (reg == 0
9321 && (r_type == R_PPC_VLE_SDA21
9322 || r_type == R_PPC_VLE_SDA21_LO))
9323 {
9324 relocation = relocation + addend;
9325 addend = 0;
9326
9327 /* Force e_li insn, keeping RT from original insn. */
9328 insn &= 0x1f << 21;
9329 insn |= 28u << 26;
9330
9331 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9332 /* Top 4 bits of value to 17..20. */
9333 insn |= (relocation & 0xf0000) >> 5;
9334 /* Next 5 bits of the value to 11..15. */
9335 insn |= (relocation & 0xf800) << 5;
9336 /* And the final 11 bits of the value to bits 21 to 31. */
9337 insn |= relocation & 0x7ff;
9338
9339 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9340
9341 if (r_type == R_PPC_VLE_SDA21
9342 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9343 goto overflow;
9344 goto copy_reloc;
9345 }
9346 else if (r_type == R_PPC_EMB_SDA21
9347 || r_type == R_PPC_VLE_SDA21
9348 || r_type == R_PPC_VLE_SDA21_LO)
9349 {
9350 /* Fill in register field. */
9351 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9352 }
9353 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
9354 }
9355 break;
9356
9357 case R_PPC_VLE_SDAREL_LO16A:
9358 case R_PPC_VLE_SDAREL_LO16D:
9359 case R_PPC_VLE_SDAREL_HI16A:
9360 case R_PPC_VLE_SDAREL_HI16D:
9361 case R_PPC_VLE_SDAREL_HA16A:
9362 case R_PPC_VLE_SDAREL_HA16D:
9363 {
9364 bfd_vma value;
9365 const char *name;
9366 //int reg;
9367 struct elf_link_hash_entry *sda = NULL;
9368
9369 if (sec == NULL || sec->output_section == NULL)
9370 {
9371 unresolved_reloc = TRUE;
9372 break;
9373 }
9374
9375 name = bfd_get_section_name (output_bfd, sec->output_section);
9376 if (strcmp (name, ".sdata") == 0
9377 || strcmp (name, ".sbss") == 0)
9378 {
9379 //reg = 13;
9380 sda = htab->sdata[0].sym;
9381 }
9382 else if (strcmp (name, ".sdata2") == 0
9383 || strcmp (name, ".sbss2") == 0)
9384 {
9385 //reg = 2;
9386 sda = htab->sdata[1].sym;
9387 }
9388 else
9389 {
9390 _bfd_error_handler
9391 /* xgettext:c-format */
9392 (_("%B: the target (%s) of a %s relocation is "
9393 "in the wrong output section (%s)"),
9394 input_bfd,
9395 sym_name,
9396 howto->name,
9397 name);
9398
9399 bfd_set_error (bfd_error_bad_value);
9400 ret = FALSE;
9401 goto copy_reloc;
9402 }
9403
9404 if (sda != NULL)
9405 {
9406 if (!is_static_defined (sda))
9407 {
9408 unresolved_reloc = TRUE;
9409 break;
9410 }
9411 }
9412
9413 value = (sda->root.u.def.section->output_section->vma
9414 + sda->root.u.def.section->output_offset
9415 + addend);
9416
9417 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9418 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9419 value, split16a_type);
9420 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9421 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9422 value, split16d_type);
9423 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9424 {
9425 value = value >> 16;
9426 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9427 value, split16a_type);
9428 }
9429 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9430 {
9431 value = value >> 16;
9432 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9433 value, split16d_type);
9434 }
9435 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9436 {
9437 value = (value + 0x8000) >> 16;
9438 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9439 value, split16a_type);
9440 }
9441 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9442 {
9443 value = (value + 0x8000) >> 16;
9444 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9445 value, split16d_type);
9446 }
9447 }
9448 goto copy_reloc;
9449
9450 /* Relocate against the beginning of the section. */
9451 case R_PPC_SECTOFF:
9452 case R_PPC_SECTOFF_LO:
9453 case R_PPC_SECTOFF_HI:
9454 case R_PPC_SECTOFF_HA:
9455 if (sec == NULL || sec->output_section == NULL)
9456 {
9457 unresolved_reloc = TRUE;
9458 break;
9459 }
9460 addend -= sec->output_section->vma;
9461 break;
9462
9463 /* Negative relocations. */
9464 case R_PPC_EMB_NADDR32:
9465 case R_PPC_EMB_NADDR16:
9466 case R_PPC_EMB_NADDR16_LO:
9467 case R_PPC_EMB_NADDR16_HI:
9468 case R_PPC_EMB_NADDR16_HA:
9469 addend -= 2 * relocation;
9470 break;
9471
9472 case R_PPC_COPY:
9473 case R_PPC_GLOB_DAT:
9474 case R_PPC_JMP_SLOT:
9475 case R_PPC_RELATIVE:
9476 case R_PPC_IRELATIVE:
9477 case R_PPC_PLT32:
9478 case R_PPC_PLTREL32:
9479 case R_PPC_PLT16_LO:
9480 case R_PPC_PLT16_HI:
9481 case R_PPC_PLT16_HA:
9482 case R_PPC_ADDR30:
9483 case R_PPC_EMB_RELSEC16:
9484 case R_PPC_EMB_RELST_LO:
9485 case R_PPC_EMB_RELST_HI:
9486 case R_PPC_EMB_RELST_HA:
9487 case R_PPC_EMB_BIT_FLD:
9488 info->callbacks->einfo
9489 /* xgettext:c-format */
9490 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9491 input_bfd,
9492 howto->name,
9493 sym_name);
9494
9495 bfd_set_error (bfd_error_invalid_operation);
9496 ret = FALSE;
9497 goto copy_reloc;
9498 }
9499
9500 /* Do any further special processing. */
9501 switch (r_type)
9502 {
9503 default:
9504 break;
9505
9506 case R_PPC_ADDR16_HA:
9507 case R_PPC_REL16_HA:
9508 case R_PPC_REL16DX_HA:
9509 case R_PPC_SECTOFF_HA:
9510 case R_PPC_TPREL16_HA:
9511 case R_PPC_DTPREL16_HA:
9512 case R_PPC_EMB_NADDR16_HA:
9513 case R_PPC_EMB_RELST_HA:
9514 /* It's just possible that this symbol is a weak symbol
9515 that's not actually defined anywhere. In that case,
9516 'sec' would be NULL, and we should leave the symbol
9517 alone (it will be set to zero elsewhere in the link). */
9518 if (sec == NULL)
9519 break;
9520 /* Fall through. */
9521
9522 case R_PPC_PLT16_HA:
9523 case R_PPC_GOT16_HA:
9524 case R_PPC_GOT_TLSGD16_HA:
9525 case R_PPC_GOT_TLSLD16_HA:
9526 case R_PPC_GOT_TPREL16_HA:
9527 case R_PPC_GOT_DTPREL16_HA:
9528 /* Add 0x10000 if sign bit in 0:15 is set.
9529 Bits 0:15 are not used. */
9530 addend += 0x8000;
9531 break;
9532
9533 case R_PPC_ADDR16:
9534 case R_PPC_ADDR16_LO:
9535 case R_PPC_GOT16:
9536 case R_PPC_GOT16_LO:
9537 case R_PPC_SDAREL16:
9538 case R_PPC_SECTOFF:
9539 case R_PPC_SECTOFF_LO:
9540 case R_PPC_DTPREL16:
9541 case R_PPC_DTPREL16_LO:
9542 case R_PPC_TPREL16:
9543 case R_PPC_TPREL16_LO:
9544 case R_PPC_GOT_TLSGD16:
9545 case R_PPC_GOT_TLSGD16_LO:
9546 case R_PPC_GOT_TLSLD16:
9547 case R_PPC_GOT_TLSLD16_LO:
9548 case R_PPC_GOT_DTPREL16:
9549 case R_PPC_GOT_DTPREL16_LO:
9550 case R_PPC_GOT_TPREL16:
9551 case R_PPC_GOT_TPREL16_LO:
9552 {
9553 /* The 32-bit ABI lacks proper relocations to deal with
9554 certain 64-bit instructions. Prevent damage to bits
9555 that make up part of the insn opcode. */
9556 unsigned int insn, mask, lobit;
9557
9558 insn = bfd_get_32 (output_bfd,
9559 contents + rel->r_offset - d_offset);
9560 mask = 0;
9561 if (is_insn_ds_form (insn))
9562 mask = 3;
9563 else if (is_insn_dq_form (insn))
9564 mask = 15;
9565 else
9566 break;
9567 relocation += addend;
9568 addend = insn & mask;
9569 lobit = mask & relocation;
9570 if (lobit != 0)
9571 {
9572 relocation ^= lobit;
9573 info->callbacks->einfo
9574 /* xgettext:c-format */
9575 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9576 input_bfd, input_section, rel->r_offset,
9577 howto->name, sym_name, mask + 1);
9578 bfd_set_error (bfd_error_bad_value);
9579 ret = FALSE;
9580 }
9581 }
9582 break;
9583 }
9584
9585 #ifdef DEBUG
9586 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9587 "offset = %ld, addend = %ld\n",
9588 howto->name,
9589 (int) r_type,
9590 sym_name,
9591 r_symndx,
9592 (long) rel->r_offset,
9593 (long) addend);
9594 #endif
9595
9596 if (unresolved_reloc
9597 && !((input_section->flags & SEC_DEBUGGING) != 0
9598 && h->def_dynamic)
9599 && _bfd_elf_section_offset (output_bfd, info, input_section,
9600 rel->r_offset) != (bfd_vma) -1)
9601 {
9602 info->callbacks->einfo
9603 /* xgettext:c-format */
9604 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9605 input_bfd, input_section, rel->r_offset,
9606 howto->name,
9607 sym_name);
9608 ret = FALSE;
9609 }
9610
9611 /* 16-bit fields in insns mostly have signed values, but a
9612 few insns have 16-bit unsigned values. Really, we should
9613 have different reloc types. */
9614 if (howto->complain_on_overflow != complain_overflow_dont
9615 && howto->dst_mask == 0xffff
9616 && (input_section->flags & SEC_CODE) != 0)
9617 {
9618 enum complain_overflow complain = complain_overflow_signed;
9619
9620 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9621 {
9622 unsigned int insn;
9623
9624 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9625 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9626 complain = complain_overflow_bitfield;
9627 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9628 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9629 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9630 complain = complain_overflow_unsigned;
9631 }
9632 if (howto->complain_on_overflow != complain)
9633 {
9634 alt_howto = *howto;
9635 alt_howto.complain_on_overflow = complain;
9636 howto = &alt_howto;
9637 }
9638 }
9639
9640 if (r_type == R_PPC_REL16DX_HA)
9641 {
9642 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9643 if (rel->r_offset + 4 > input_section->size)
9644 r = bfd_reloc_outofrange;
9645 else
9646 {
9647 unsigned int insn;
9648
9649 relocation += addend;
9650 relocation -= (rel->r_offset
9651 + input_section->output_offset
9652 + input_section->output_section->vma);
9653 relocation >>= 16;
9654 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9655 insn &= ~0x1fffc1;
9656 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9657 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9658 r = bfd_reloc_ok;
9659 }
9660 }
9661 else
9662 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9663 rel->r_offset, relocation, addend);
9664
9665 if (r != bfd_reloc_ok)
9666 {
9667 if (r == bfd_reloc_overflow)
9668 {
9669 overflow:
9670 /* On code like "if (foo) foo();" don't report overflow
9671 on a branch to zero when foo is undefined. */
9672 if (!warned
9673 && !(h != NULL
9674 && (h->root.type == bfd_link_hash_undefweak
9675 || h->root.type == bfd_link_hash_undefined)
9676 && is_branch_reloc (r_type)))
9677 info->callbacks->reloc_overflow
9678 (info, (h ? &h->root : NULL), sym_name, howto->name,
9679 rel->r_addend, input_bfd, input_section, rel->r_offset);
9680 }
9681 else
9682 {
9683 info->callbacks->einfo
9684 /* xgettext:c-format */
9685 (_("%P: %H: %s reloc against `%s': error %d\n"),
9686 input_bfd, input_section, rel->r_offset,
9687 howto->name, sym_name, (int) r);
9688 ret = FALSE;
9689 }
9690 }
9691 copy_reloc:
9692 if (wrel != rel)
9693 *wrel = *rel;
9694 }
9695
9696 if (wrel != rel)
9697 {
9698 Elf_Internal_Shdr *rel_hdr;
9699 size_t deleted = rel - wrel;
9700
9701 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9702 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9703 if (rel_hdr->sh_size == 0)
9704 {
9705 /* It is too late to remove an empty reloc section. Leave
9706 one NONE reloc.
9707 ??? What is wrong with an empty section??? */
9708 rel_hdr->sh_size = rel_hdr->sh_entsize;
9709 deleted -= 1;
9710 wrel++;
9711 }
9712 relend = wrel;
9713 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9714 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9715 input_section->reloc_count -= deleted;
9716 }
9717
9718 #ifdef DEBUG
9719 fprintf (stderr, "\n");
9720 #endif
9721
9722 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9723 && input_section->size != input_section->rawsize
9724 && (strcmp (input_section->output_section->name, ".init") == 0
9725 || strcmp (input_section->output_section->name, ".fini") == 0))
9726 {
9727 /* Branch around the trampolines. */
9728 unsigned int insn = B + input_section->size - input_section->rawsize;
9729 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9730 }
9731
9732 if (htab->params->ppc476_workaround
9733 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9734 && (!bfd_link_relocatable (info)
9735 || (input_section->output_section->alignment_power
9736 >= htab->params->pagesize_p2)))
9737 {
9738 bfd_vma start_addr, end_addr, addr;
9739 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9740
9741 if (relax_info->workaround_size != 0)
9742 {
9743 bfd_byte *p;
9744 unsigned int n;
9745 bfd_byte fill[4];
9746
9747 bfd_put_32 (input_bfd, BA, fill);
9748 p = contents + input_section->size - relax_info->workaround_size;
9749 n = relax_info->workaround_size >> 2;
9750 while (n--)
9751 {
9752 memcpy (p, fill, 4);
9753 p += 4;
9754 }
9755 }
9756
9757 /* The idea is: Replace the last instruction on a page with a
9758 branch to a patch area. Put the insn there followed by a
9759 branch back to the next page. Complicated a little by
9760 needing to handle moved conditional branches, and by not
9761 wanting to touch data-in-text. */
9762
9763 start_addr = (input_section->output_section->vma
9764 + input_section->output_offset);
9765 end_addr = (start_addr + input_section->size
9766 - relax_info->workaround_size);
9767 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9768 addr < end_addr;
9769 addr += pagesize)
9770 {
9771 bfd_vma offset = addr - start_addr;
9772 Elf_Internal_Rela *lo, *hi;
9773 bfd_boolean is_data;
9774 bfd_vma patch_off, patch_addr;
9775 unsigned int insn;
9776
9777 /* Do we have a data reloc at this offset? If so, leave
9778 the word alone. */
9779 is_data = FALSE;
9780 lo = relocs;
9781 hi = relend;
9782 rel = NULL;
9783 while (lo < hi)
9784 {
9785 rel = lo + (hi - lo) / 2;
9786 if (rel->r_offset < offset)
9787 lo = rel + 1;
9788 else if (rel->r_offset > offset + 3)
9789 hi = rel;
9790 else
9791 {
9792 switch (ELF32_R_TYPE (rel->r_info))
9793 {
9794 case R_PPC_ADDR32:
9795 case R_PPC_UADDR32:
9796 case R_PPC_REL32:
9797 case R_PPC_ADDR30:
9798 is_data = TRUE;
9799 break;
9800 default:
9801 break;
9802 }
9803 break;
9804 }
9805 }
9806 if (is_data)
9807 continue;
9808
9809 /* Some instructions can be left alone too. Unconditional
9810 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9811 avoid the icache failure.
9812
9813 The problem occurs due to prefetch across a page boundary
9814 where stale instructions can be fetched from the next
9815 page, and the mechanism for flushing these bad
9816 instructions fails under certain circumstances. The
9817 unconditional branches:
9818 1) Branch: b, bl, ba, bla,
9819 2) Branch Conditional: bc, bca, bcl, bcla,
9820 3) Branch Conditional to Link Register: bclr, bclrl,
9821 where (2) and (3) have BO=0x14 making them unconditional,
9822 prevent the bad prefetch because the prefetch itself is
9823 affected by these instructions. This happens even if the
9824 instruction is not executed.
9825
9826 A bctr example:
9827 .
9828 . lis 9,new_page@ha
9829 . addi 9,9,new_page@l
9830 . mtctr 9
9831 . bctr
9832 . nop
9833 . nop
9834 . new_page:
9835 .
9836 The bctr is not predicted taken due to ctr not being
9837 ready, so prefetch continues on past the bctr into the
9838 new page which might have stale instructions. If they
9839 fail to be flushed, then they will be executed after the
9840 bctr executes. Either of the following modifications
9841 prevent the bad prefetch from happening in the first
9842 place:
9843 .
9844 . lis 9,new_page@ha lis 9,new_page@ha
9845 . addi 9,9,new_page@l addi 9,9,new_page@l
9846 . mtctr 9 mtctr 9
9847 . bctr bctr
9848 . nop b somewhere_else
9849 . b somewhere_else nop
9850 . new_page: new_page:
9851 . */
9852 insn = bfd_get_32 (input_bfd, contents + offset);
9853 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9854 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9855 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9856 || ((insn & (0x3f << 26)) == (19u << 26)
9857 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9858 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9859 continue;
9860
9861 patch_addr = (start_addr + input_section->size
9862 - relax_info->workaround_size);
9863 patch_addr = (patch_addr + 15) & -16;
9864 patch_off = patch_addr - start_addr;
9865 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9866
9867 if (rel != NULL
9868 && rel->r_offset >= offset
9869 && rel->r_offset < offset + 4)
9870 {
9871 asection *sreloc;
9872
9873 /* If the insn we are patching had a reloc, adjust the
9874 reloc r_offset so that the reloc applies to the moved
9875 location. This matters for -r and --emit-relocs. */
9876 if (rel + 1 != relend)
9877 {
9878 Elf_Internal_Rela tmp = *rel;
9879
9880 /* Keep the relocs sorted by r_offset. */
9881 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9882 relend[-1] = tmp;
9883 }
9884 relend[-1].r_offset += patch_off - offset;
9885
9886 /* Adjust REL16 addends too. */
9887 switch (ELF32_R_TYPE (relend[-1].r_info))
9888 {
9889 case R_PPC_REL16:
9890 case R_PPC_REL16_LO:
9891 case R_PPC_REL16_HI:
9892 case R_PPC_REL16_HA:
9893 relend[-1].r_addend += patch_off - offset;
9894 break;
9895 default:
9896 break;
9897 }
9898
9899 /* If we are building a PIE or shared library with
9900 non-PIC objects, perhaps we had a dynamic reloc too?
9901 If so, the dynamic reloc must move with the insn. */
9902 sreloc = elf_section_data (input_section)->sreloc;
9903 if (sreloc != NULL)
9904 {
9905 Elf32_External_Rela *slo, *shi, *srelend;
9906 bfd_vma soffset;
9907
9908 slo = (Elf32_External_Rela *) sreloc->contents;
9909 shi = srelend = slo + sreloc->reloc_count;
9910 soffset = (offset + input_section->output_section->vma
9911 + input_section->output_offset);
9912 while (slo < shi)
9913 {
9914 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9915 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9916 &outrel);
9917 if (outrel.r_offset < soffset)
9918 slo = srel + 1;
9919 else if (outrel.r_offset > soffset + 3)
9920 shi = srel;
9921 else
9922 {
9923 if (srel + 1 != srelend)
9924 {
9925 memmove (srel, srel + 1,
9926 (srelend - (srel + 1)) * sizeof (*srel));
9927 srel = srelend - 1;
9928 }
9929 outrel.r_offset += patch_off - offset;
9930 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9931 (bfd_byte *) srel);
9932 break;
9933 }
9934 }
9935 }
9936 }
9937 else
9938 rel = NULL;
9939
9940 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9941 && (insn & 2) == 0 /* relative */)
9942 {
9943 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9944
9945 delta += offset - patch_off;
9946 if (bfd_link_relocatable (info) && rel != NULL)
9947 delta = 0;
9948 if (!bfd_link_relocatable (info) && rel != NULL)
9949 {
9950 enum elf_ppc_reloc_type r_type;
9951
9952 r_type = ELF32_R_TYPE (relend[-1].r_info);
9953 if (r_type == R_PPC_REL14_BRTAKEN)
9954 insn |= BRANCH_PREDICT_BIT;
9955 else if (r_type == R_PPC_REL14_BRNTAKEN)
9956 insn &= ~BRANCH_PREDICT_BIT;
9957 else
9958 BFD_ASSERT (r_type == R_PPC_REL14);
9959
9960 if ((r_type == R_PPC_REL14_BRTAKEN
9961 || r_type == R_PPC_REL14_BRNTAKEN)
9962 && delta + 0x8000 < 0x10000
9963 && (bfd_signed_vma) delta < 0)
9964 insn ^= BRANCH_PREDICT_BIT;
9965 }
9966 if (delta + 0x8000 < 0x10000)
9967 {
9968 bfd_put_32 (input_bfd,
9969 (insn & ~0xfffc) | (delta & 0xfffc),
9970 contents + patch_off);
9971 patch_off += 4;
9972 bfd_put_32 (input_bfd,
9973 B | ((offset + 4 - patch_off) & 0x3fffffc),
9974 contents + patch_off);
9975 patch_off += 4;
9976 }
9977 else
9978 {
9979 if (rel != NULL)
9980 {
9981 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9982
9983 relend[-1].r_offset += 8;
9984 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9985 }
9986 bfd_put_32 (input_bfd,
9987 (insn & ~0xfffc) | 8,
9988 contents + patch_off);
9989 patch_off += 4;
9990 bfd_put_32 (input_bfd,
9991 B | ((offset + 4 - patch_off) & 0x3fffffc),
9992 contents + patch_off);
9993 patch_off += 4;
9994 bfd_put_32 (input_bfd,
9995 B | ((delta - 8) & 0x3fffffc),
9996 contents + patch_off);
9997 patch_off += 4;
9998 }
9999 }
10000 else
10001 {
10002 bfd_put_32 (input_bfd, insn, contents + patch_off);
10003 patch_off += 4;
10004 bfd_put_32 (input_bfd,
10005 B | ((offset + 4 - patch_off) & 0x3fffffc),
10006 contents + patch_off);
10007 patch_off += 4;
10008 }
10009 BFD_ASSERT (patch_off <= input_section->size);
10010 relax_info->workaround_size = input_section->size - patch_off;
10011 }
10012 }
10013
10014 return ret;
10015 }
10016 \f
10017 /* Finish up dynamic symbol handling. We set the contents of various
10018 dynamic sections here. */
10019
10020 static bfd_boolean
10021 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10022 struct bfd_link_info *info,
10023 struct elf_link_hash_entry *h,
10024 Elf_Internal_Sym *sym)
10025 {
10026 struct ppc_elf_link_hash_table *htab;
10027 struct plt_entry *ent;
10028 bfd_boolean doneone;
10029
10030 #ifdef DEBUG
10031 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10032 h->root.root.string);
10033 #endif
10034
10035 htab = ppc_elf_hash_table (info);
10036 BFD_ASSERT (htab->elf.dynobj != NULL);
10037
10038 doneone = FALSE;
10039 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10040 if (ent->plt.offset != (bfd_vma) -1)
10041 {
10042 if (!doneone)
10043 {
10044 Elf_Internal_Rela rela;
10045 bfd_byte *loc;
10046 bfd_vma reloc_index;
10047
10048 if (htab->plt_type == PLT_NEW
10049 || !htab->elf.dynamic_sections_created
10050 || h->dynindx == -1)
10051 reloc_index = ent->plt.offset / 4;
10052 else
10053 {
10054 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10055 / htab->plt_slot_size);
10056 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10057 && htab->plt_type == PLT_OLD)
10058 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10059 }
10060
10061 /* This symbol has an entry in the procedure linkage table.
10062 Set it up. */
10063 if (htab->plt_type == PLT_VXWORKS
10064 && htab->elf.dynamic_sections_created
10065 && h->dynindx != -1)
10066 {
10067 bfd_vma got_offset;
10068 const bfd_vma *plt_entry;
10069
10070 /* The first three entries in .got.plt are reserved. */
10071 got_offset = (reloc_index + 3) * 4;
10072
10073 /* Use the right PLT. */
10074 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10075 : ppc_elf_vxworks_plt_entry;
10076
10077 /* Fill in the .plt on VxWorks. */
10078 if (bfd_link_pic (info))
10079 {
10080 bfd_put_32 (output_bfd,
10081 plt_entry[0] | PPC_HA (got_offset),
10082 htab->plt->contents + ent->plt.offset + 0);
10083 bfd_put_32 (output_bfd,
10084 plt_entry[1] | PPC_LO (got_offset),
10085 htab->plt->contents + ent->plt.offset + 4);
10086 }
10087 else
10088 {
10089 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10090
10091 bfd_put_32 (output_bfd,
10092 plt_entry[0] | PPC_HA (got_loc),
10093 htab->plt->contents + ent->plt.offset + 0);
10094 bfd_put_32 (output_bfd,
10095 plt_entry[1] | PPC_LO (got_loc),
10096 htab->plt->contents + ent->plt.offset + 4);
10097 }
10098
10099 bfd_put_32 (output_bfd, plt_entry[2],
10100 htab->plt->contents + ent->plt.offset + 8);
10101 bfd_put_32 (output_bfd, plt_entry[3],
10102 htab->plt->contents + ent->plt.offset + 12);
10103
10104 /* This instruction is an immediate load. The value loaded is
10105 the byte offset of the R_PPC_JMP_SLOT relocation from the
10106 start of the .rela.plt section. The value is stored in the
10107 low-order 16 bits of the load instruction. */
10108 /* NOTE: It appears that this is now an index rather than a
10109 prescaled offset. */
10110 bfd_put_32 (output_bfd,
10111 plt_entry[4] | reloc_index,
10112 htab->plt->contents + ent->plt.offset + 16);
10113 /* This instruction is a PC-relative branch whose target is
10114 the start of the PLT section. The address of this branch
10115 instruction is 20 bytes beyond the start of this PLT entry.
10116 The address is encoded in bits 6-29, inclusive. The value
10117 stored is right-shifted by two bits, permitting a 26-bit
10118 offset. */
10119 bfd_put_32 (output_bfd,
10120 (plt_entry[5]
10121 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10122 htab->plt->contents + ent->plt.offset + 20);
10123 bfd_put_32 (output_bfd, plt_entry[6],
10124 htab->plt->contents + ent->plt.offset + 24);
10125 bfd_put_32 (output_bfd, plt_entry[7],
10126 htab->plt->contents + ent->plt.offset + 28);
10127
10128 /* Fill in the GOT entry corresponding to this PLT slot with
10129 the address immediately after the "bctr" instruction
10130 in this PLT entry. */
10131 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
10132 + htab->plt->output_offset
10133 + ent->plt.offset + 16),
10134 htab->sgotplt->contents + got_offset);
10135
10136 if (!bfd_link_pic (info))
10137 {
10138 /* Fill in a couple of entries in .rela.plt.unloaded. */
10139 loc = htab->srelplt2->contents
10140 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10141 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10142 * sizeof (Elf32_External_Rela));
10143
10144 /* Provide the @ha relocation for the first instruction. */
10145 rela.r_offset = (htab->plt->output_section->vma
10146 + htab->plt->output_offset
10147 + ent->plt.offset + 2);
10148 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10149 R_PPC_ADDR16_HA);
10150 rela.r_addend = got_offset;
10151 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10152 loc += sizeof (Elf32_External_Rela);
10153
10154 /* Provide the @l relocation for the second instruction. */
10155 rela.r_offset = (htab->plt->output_section->vma
10156 + htab->plt->output_offset
10157 + ent->plt.offset + 6);
10158 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10159 R_PPC_ADDR16_LO);
10160 rela.r_addend = got_offset;
10161 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10162 loc += sizeof (Elf32_External_Rela);
10163
10164 /* Provide a relocation for the GOT entry corresponding to this
10165 PLT slot. Point it at the middle of the .plt entry. */
10166 rela.r_offset = (htab->sgotplt->output_section->vma
10167 + htab->sgotplt->output_offset
10168 + got_offset);
10169 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10170 R_PPC_ADDR32);
10171 rela.r_addend = ent->plt.offset + 16;
10172 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10173 }
10174
10175 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10176 In particular, the offset for the relocation is not the
10177 address of the PLT entry for this function, as specified
10178 by the ABI. Instead, the offset is set to the address of
10179 the GOT slot for this function. See EABI 4.4.4.1. */
10180 rela.r_offset = (htab->sgotplt->output_section->vma
10181 + htab->sgotplt->output_offset
10182 + got_offset);
10183
10184 }
10185 else
10186 {
10187 asection *splt = htab->plt;
10188 if (!htab->elf.dynamic_sections_created
10189 || h->dynindx == -1)
10190 splt = htab->iplt;
10191
10192 rela.r_offset = (splt->output_section->vma
10193 + splt->output_offset
10194 + ent->plt.offset);
10195 if (htab->plt_type == PLT_OLD
10196 || !htab->elf.dynamic_sections_created
10197 || h->dynindx == -1)
10198 {
10199 /* We don't need to fill in the .plt. The ppc dynamic
10200 linker will fill it in. */
10201 }
10202 else
10203 {
10204 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10205 + htab->glink->output_section->vma
10206 + htab->glink->output_offset);
10207 bfd_put_32 (output_bfd, val,
10208 splt->contents + ent->plt.offset);
10209 }
10210 }
10211
10212 /* Fill in the entry in the .rela.plt section. */
10213 rela.r_addend = 0;
10214 if (!htab->elf.dynamic_sections_created
10215 || h->dynindx == -1)
10216 {
10217 BFD_ASSERT (h->type == STT_GNU_IFUNC
10218 && h->def_regular
10219 && (h->root.type == bfd_link_hash_defined
10220 || h->root.type == bfd_link_hash_defweak));
10221 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10222 rela.r_addend = SYM_VAL (h);
10223 }
10224 else
10225 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10226
10227 if (!htab->elf.dynamic_sections_created
10228 || h->dynindx == -1)
10229 loc = (htab->reliplt->contents
10230 + (htab->reliplt->reloc_count++
10231 * sizeof (Elf32_External_Rela)));
10232 else
10233 loc = (htab->relplt->contents
10234 + reloc_index * sizeof (Elf32_External_Rela));
10235 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10236
10237 if (!h->def_regular)
10238 {
10239 /* Mark the symbol as undefined, rather than as
10240 defined in the .plt section. Leave the value if
10241 there were any relocations where pointer equality
10242 matters (this is a clue for the dynamic linker, to
10243 make function pointer comparisons work between an
10244 application and shared library), otherwise set it
10245 to zero. */
10246 sym->st_shndx = SHN_UNDEF;
10247 if (!h->pointer_equality_needed)
10248 sym->st_value = 0;
10249 else if (!h->ref_regular_nonweak)
10250 {
10251 /* This breaks function pointer comparisons, but
10252 that is better than breaking tests for a NULL
10253 function pointer. */
10254 sym->st_value = 0;
10255 }
10256 }
10257 else if (h->type == STT_GNU_IFUNC
10258 && !bfd_link_pic (info))
10259 {
10260 /* Set the value of ifunc symbols in a non-pie
10261 executable to the glink entry. This is to avoid
10262 text relocations. We can't do this for ifunc in
10263 allocate_dynrelocs, as we do for normal dynamic
10264 function symbols with plt entries, because we need
10265 to keep the original value around for the ifunc
10266 relocation. */
10267 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10268 (output_bfd, htab->glink->output_section));
10269 sym->st_value = (ent->glink_offset
10270 + htab->glink->output_offset
10271 + htab->glink->output_section->vma);
10272 }
10273 doneone = TRUE;
10274 }
10275
10276 if (htab->plt_type == PLT_NEW
10277 || !htab->elf.dynamic_sections_created
10278 || h->dynindx == -1)
10279 {
10280 unsigned char *p;
10281 asection *splt = htab->plt;
10282 if (!htab->elf.dynamic_sections_created
10283 || h->dynindx == -1)
10284 splt = htab->iplt;
10285
10286 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10287
10288 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10289 {
10290 bfd_put_32 (output_bfd, LWZ_11_3, p);
10291 p += 4;
10292 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10293 p += 4;
10294 bfd_put_32 (output_bfd, MR_0_3, p);
10295 p += 4;
10296 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10297 p += 4;
10298 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10299 p += 4;
10300 bfd_put_32 (output_bfd, BEQLR, p);
10301 p += 4;
10302 bfd_put_32 (output_bfd, MR_3_0, p);
10303 p += 4;
10304 bfd_put_32 (output_bfd, NOP, p);
10305 p += 4;
10306 }
10307
10308 write_glink_stub (ent, splt, p, info);
10309
10310 if (!bfd_link_pic (info))
10311 /* We only need one non-PIC glink stub. */
10312 break;
10313 }
10314 else
10315 break;
10316 }
10317
10318 if (h->needs_copy)
10319 {
10320 asection *s;
10321 Elf_Internal_Rela rela;
10322 bfd_byte *loc;
10323
10324 /* This symbols needs a copy reloc. Set it up. */
10325
10326 #ifdef DEBUG
10327 fprintf (stderr, ", copy");
10328 #endif
10329
10330 BFD_ASSERT (h->dynindx != -1);
10331
10332 if (ppc_elf_hash_entry (h)->has_sda_refs)
10333 s = htab->relsbss;
10334 else
10335 s = htab->relbss;
10336 BFD_ASSERT (s != NULL);
10337
10338 rela.r_offset = SYM_VAL (h);
10339 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10340 rela.r_addend = 0;
10341 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10342 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10343 }
10344
10345 #ifdef DEBUG
10346 fprintf (stderr, "\n");
10347 #endif
10348
10349 return TRUE;
10350 }
10351 \f
10352 static enum elf_reloc_type_class
10353 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10354 const asection *rel_sec,
10355 const Elf_Internal_Rela *rela)
10356 {
10357 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10358
10359 if (rel_sec == htab->reliplt)
10360 return reloc_class_ifunc;
10361
10362 switch (ELF32_R_TYPE (rela->r_info))
10363 {
10364 case R_PPC_RELATIVE:
10365 return reloc_class_relative;
10366 case R_PPC_JMP_SLOT:
10367 return reloc_class_plt;
10368 case R_PPC_COPY:
10369 return reloc_class_copy;
10370 default:
10371 return reloc_class_normal;
10372 }
10373 }
10374 \f
10375 /* Finish up the dynamic sections. */
10376
10377 static bfd_boolean
10378 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10379 struct bfd_link_info *info)
10380 {
10381 asection *sdyn;
10382 asection *splt;
10383 struct ppc_elf_link_hash_table *htab;
10384 bfd_vma got;
10385 bfd *dynobj;
10386 bfd_boolean ret = TRUE;
10387
10388 #ifdef DEBUG
10389 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10390 #endif
10391
10392 htab = ppc_elf_hash_table (info);
10393 dynobj = elf_hash_table (info)->dynobj;
10394 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10395 if (htab->is_vxworks)
10396 splt = bfd_get_linker_section (dynobj, ".plt");
10397 else
10398 splt = NULL;
10399
10400 got = 0;
10401 if (htab->elf.hgot != NULL)
10402 got = SYM_VAL (htab->elf.hgot);
10403
10404 if (htab->elf.dynamic_sections_created)
10405 {
10406 Elf32_External_Dyn *dyncon, *dynconend;
10407
10408 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
10409
10410 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10411 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10412 for (; dyncon < dynconend; dyncon++)
10413 {
10414 Elf_Internal_Dyn dyn;
10415 asection *s;
10416
10417 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10418
10419 switch (dyn.d_tag)
10420 {
10421 case DT_PLTGOT:
10422 if (htab->is_vxworks)
10423 s = htab->sgotplt;
10424 else
10425 s = htab->plt;
10426 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10427 break;
10428
10429 case DT_PLTRELSZ:
10430 dyn.d_un.d_val = htab->relplt->size;
10431 break;
10432
10433 case DT_JMPREL:
10434 s = htab->relplt;
10435 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10436 break;
10437
10438 case DT_PPC_GOT:
10439 dyn.d_un.d_ptr = got;
10440 break;
10441
10442 case DT_RELASZ:
10443 if (htab->is_vxworks)
10444 {
10445 if (htab->relplt)
10446 dyn.d_un.d_ptr -= htab->relplt->size;
10447 break;
10448 }
10449 continue;
10450
10451 default:
10452 if (htab->is_vxworks
10453 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10454 break;
10455 continue;
10456 }
10457
10458 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10459 }
10460 }
10461
10462 if (htab->got != NULL)
10463 {
10464 if (htab->elf.hgot->root.u.def.section == htab->got
10465 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
10466 {
10467 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10468
10469 p += htab->elf.hgot->root.u.def.value;
10470 if (htab->plt_type == PLT_OLD)
10471 {
10472 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10473 so that a function can easily find the address of
10474 _GLOBAL_OFFSET_TABLE_. */
10475 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10476 < htab->elf.hgot->root.u.def.section->size);
10477 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10478 }
10479
10480 if (sdyn != NULL)
10481 {
10482 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10483 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10484 < htab->elf.hgot->root.u.def.section->size);
10485 bfd_put_32 (output_bfd, val, p);
10486 }
10487 }
10488 else
10489 {
10490 /* xgettext:c-format */
10491 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10492 htab->elf.hgot->root.root.string,
10493 (htab->sgotplt != NULL
10494 ? htab->sgotplt->name : htab->got->name));
10495 bfd_set_error (bfd_error_bad_value);
10496 ret = FALSE;
10497 }
10498
10499 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
10500 }
10501
10502 /* Fill in the first entry in the VxWorks procedure linkage table. */
10503 if (splt && splt->size > 0)
10504 {
10505 /* Use the right PLT. */
10506 const bfd_vma *plt_entry = (bfd_link_pic (info)
10507 ? ppc_elf_vxworks_pic_plt0_entry
10508 : ppc_elf_vxworks_plt0_entry);
10509
10510 if (!bfd_link_pic (info))
10511 {
10512 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10513
10514 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10515 splt->contents + 0);
10516 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10517 splt->contents + 4);
10518 }
10519 else
10520 {
10521 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10522 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10523 }
10524 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10525 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10526 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10527 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10528 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10529 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10530
10531 if (! bfd_link_pic (info))
10532 {
10533 Elf_Internal_Rela rela;
10534 bfd_byte *loc;
10535
10536 loc = htab->srelplt2->contents;
10537
10538 /* Output the @ha relocation for the first instruction. */
10539 rela.r_offset = (htab->plt->output_section->vma
10540 + htab->plt->output_offset
10541 + 2);
10542 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10543 rela.r_addend = 0;
10544 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10545 loc += sizeof (Elf32_External_Rela);
10546
10547 /* Output the @l relocation for the second instruction. */
10548 rela.r_offset = (htab->plt->output_section->vma
10549 + htab->plt->output_offset
10550 + 6);
10551 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10552 rela.r_addend = 0;
10553 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10554 loc += sizeof (Elf32_External_Rela);
10555
10556 /* Fix up the remaining relocations. They may have the wrong
10557 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10558 in which symbols were output. */
10559 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10560 {
10561 Elf_Internal_Rela rel;
10562
10563 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10564 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10565 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10566 loc += sizeof (Elf32_External_Rela);
10567
10568 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10569 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10570 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10571 loc += sizeof (Elf32_External_Rela);
10572
10573 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10574 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10575 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10576 loc += sizeof (Elf32_External_Rela);
10577 }
10578 }
10579 }
10580
10581 if (htab->glink != NULL
10582 && htab->glink->contents != NULL
10583 && htab->elf.dynamic_sections_created)
10584 {
10585 unsigned char *p;
10586 unsigned char *endp;
10587 bfd_vma res0;
10588 unsigned int i;
10589
10590 /*
10591 * PIC glink code is the following:
10592 *
10593 * # ith PLT code stub.
10594 * addis 11,30,(plt+(i-1)*4-got)@ha
10595 * lwz 11,(plt+(i-1)*4-got)@l(11)
10596 * mtctr 11
10597 * bctr
10598 *
10599 * # A table of branches, one for each plt entry.
10600 * # The idea is that the plt call stub loads ctr and r11 with these
10601 * # addresses, so (r11 - res_0) gives the plt index * 4.
10602 * res_0: b PLTresolve
10603 * res_1: b PLTresolve
10604 * .
10605 * # Some number of entries towards the end can be nops
10606 * res_n_m3: nop
10607 * res_n_m2: nop
10608 * res_n_m1:
10609 *
10610 * PLTresolve:
10611 * addis 11,11,(1f-res_0)@ha
10612 * mflr 0
10613 * bcl 20,31,1f
10614 * 1: addi 11,11,(1b-res_0)@l
10615 * mflr 12
10616 * mtlr 0
10617 * sub 11,11,12 # r11 = index * 4
10618 * addis 12,12,(got+4-1b)@ha
10619 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10620 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10621 * mtctr 0
10622 * add 0,11,11
10623 * add 11,0,11 # r11 = index * 12 = reloc offset.
10624 * bctr
10625 */
10626 static const unsigned int pic_plt_resolve[] =
10627 {
10628 ADDIS_11_11,
10629 MFLR_0,
10630 BCL_20_31,
10631 ADDI_11_11,
10632 MFLR_12,
10633 MTLR_0,
10634 SUB_11_11_12,
10635 ADDIS_12_12,
10636 LWZ_0_12,
10637 LWZ_12_12,
10638 MTCTR_0,
10639 ADD_0_11_11,
10640 ADD_11_0_11,
10641 BCTR,
10642 NOP,
10643 NOP
10644 };
10645
10646 /*
10647 * Non-PIC glink code is a little simpler.
10648 *
10649 * # ith PLT code stub.
10650 * lis 11,(plt+(i-1)*4)@ha
10651 * lwz 11,(plt+(i-1)*4)@l(11)
10652 * mtctr 11
10653 * bctr
10654 *
10655 * The branch table is the same, then comes
10656 *
10657 * PLTresolve:
10658 * lis 12,(got+4)@ha
10659 * addis 11,11,(-res_0)@ha
10660 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10661 * addi 11,11,(-res_0)@l # r11 = index * 4
10662 * mtctr 0
10663 * add 0,11,11
10664 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10665 * add 11,0,11 # r11 = index * 12 = reloc offset.
10666 * bctr
10667 */
10668 static const unsigned int plt_resolve[] =
10669 {
10670 LIS_12,
10671 ADDIS_11_11,
10672 LWZ_0_12,
10673 ADDI_11_11,
10674 MTCTR_0,
10675 ADD_0_11_11,
10676 LWZ_12_12,
10677 ADD_11_0_11,
10678 BCTR,
10679 NOP,
10680 NOP,
10681 NOP,
10682 NOP,
10683 NOP,
10684 NOP,
10685 NOP
10686 };
10687
10688 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10689 abort ();
10690 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10691 abort ();
10692
10693 /* Build the branch table, one for each plt entry (less one),
10694 and perhaps some padding. */
10695 p = htab->glink->contents;
10696 p += htab->glink_pltresolve;
10697 endp = htab->glink->contents;
10698 endp += htab->glink->size - GLINK_PLTRESOLVE;
10699 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10700 {
10701 bfd_put_32 (output_bfd, B + endp - p, p);
10702 p += 4;
10703 }
10704 while (p < endp)
10705 {
10706 bfd_put_32 (output_bfd, NOP, p);
10707 p += 4;
10708 }
10709
10710 res0 = (htab->glink_pltresolve
10711 + htab->glink->output_section->vma
10712 + htab->glink->output_offset);
10713
10714 if (htab->params->ppc476_workaround)
10715 {
10716 /* Ensure that a call stub at the end of a page doesn't
10717 result in prefetch over the end of the page into the
10718 glink branch table. */
10719 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10720 bfd_vma page_addr;
10721 bfd_vma glink_start = (htab->glink->output_section->vma
10722 + htab->glink->output_offset);
10723
10724 for (page_addr = res0 & -pagesize;
10725 page_addr > glink_start;
10726 page_addr -= pagesize)
10727 {
10728 /* We have a plt call stub that may need fixing. */
10729 bfd_byte *loc;
10730 unsigned int insn;
10731
10732 loc = htab->glink->contents + page_addr - 4 - glink_start;
10733 insn = bfd_get_32 (output_bfd, loc);
10734 if (insn == BCTR)
10735 {
10736 /* By alignment, we know that there must be at least
10737 one other call stub before this one. */
10738 insn = bfd_get_32 (output_bfd, loc - 16);
10739 if (insn == BCTR)
10740 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10741 else
10742 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10743 }
10744 }
10745 }
10746
10747 /* Last comes the PLTresolve stub. */
10748 if (bfd_link_pic (info))
10749 {
10750 bfd_vma bcl;
10751
10752 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10753 {
10754 unsigned int insn = pic_plt_resolve[i];
10755
10756 if (htab->params->ppc476_workaround && insn == NOP)
10757 insn = BA + 0;
10758 bfd_put_32 (output_bfd, insn, p);
10759 p += 4;
10760 }
10761 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10762
10763 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10764 + htab->glink->output_section->vma
10765 + htab->glink->output_offset);
10766
10767 bfd_put_32 (output_bfd,
10768 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10769 bfd_put_32 (output_bfd,
10770 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10771 bfd_put_32 (output_bfd,
10772 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10773 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10774 {
10775 bfd_put_32 (output_bfd,
10776 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10777 bfd_put_32 (output_bfd,
10778 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10779 }
10780 else
10781 {
10782 bfd_put_32 (output_bfd,
10783 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10784 bfd_put_32 (output_bfd,
10785 LWZ_12_12 + 4, p + 9*4);
10786 }
10787 }
10788 else
10789 {
10790 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10791 {
10792 unsigned int insn = plt_resolve[i];
10793
10794 if (htab->params->ppc476_workaround && insn == NOP)
10795 insn = BA + 0;
10796 bfd_put_32 (output_bfd, insn, p);
10797 p += 4;
10798 }
10799 p -= 4 * ARRAY_SIZE (plt_resolve);
10800
10801 bfd_put_32 (output_bfd,
10802 LIS_12 + PPC_HA (got + 4), p + 0*4);
10803 bfd_put_32 (output_bfd,
10804 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10805 bfd_put_32 (output_bfd,
10806 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10807 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10808 {
10809 bfd_put_32 (output_bfd,
10810 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10811 bfd_put_32 (output_bfd,
10812 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10813 }
10814 else
10815 {
10816 bfd_put_32 (output_bfd,
10817 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10818 bfd_put_32 (output_bfd,
10819 LWZ_12_12 + 4, p + 6*4);
10820 }
10821 }
10822 }
10823
10824 if (htab->glink_eh_frame != NULL
10825 && htab->glink_eh_frame->contents != NULL)
10826 {
10827 unsigned char *p = htab->glink_eh_frame->contents;
10828 bfd_vma val;
10829
10830 p += sizeof (glink_eh_frame_cie);
10831 /* FDE length. */
10832 p += 4;
10833 /* CIE pointer. */
10834 p += 4;
10835 /* Offset to .glink. */
10836 val = (htab->glink->output_section->vma
10837 + htab->glink->output_offset);
10838 val -= (htab->glink_eh_frame->output_section->vma
10839 + htab->glink_eh_frame->output_offset);
10840 val -= p - htab->glink_eh_frame->contents;
10841 bfd_put_32 (htab->elf.dynobj, val, p);
10842
10843 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10844 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10845 htab->glink_eh_frame,
10846 htab->glink_eh_frame->contents))
10847 return FALSE;
10848 }
10849
10850 return ret;
10851 }
10852 \f
10853 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10854 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10855 #define TARGET_BIG_SYM powerpc_elf32_vec
10856 #define TARGET_BIG_NAME "elf32-powerpc"
10857 #define ELF_ARCH bfd_arch_powerpc
10858 #define ELF_TARGET_ID PPC32_ELF_DATA
10859 #define ELF_MACHINE_CODE EM_PPC
10860 #ifdef __QNXTARGET__
10861 #define ELF_MAXPAGESIZE 0x1000
10862 #define ELF_COMMONPAGESIZE 0x1000
10863 #else
10864 #define ELF_MAXPAGESIZE 0x10000
10865 #define ELF_COMMONPAGESIZE 0x10000
10866 #endif
10867 #define ELF_MINPAGESIZE 0x1000
10868 #define elf_info_to_howto ppc_elf_info_to_howto
10869
10870 #ifdef EM_CYGNUS_POWERPC
10871 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10872 #endif
10873
10874 #ifdef EM_PPC_OLD
10875 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10876 #endif
10877
10878 #define elf_backend_plt_not_loaded 1
10879 #define elf_backend_can_gc_sections 1
10880 #define elf_backend_can_refcount 1
10881 #define elf_backend_rela_normal 1
10882 #define elf_backend_caches_rawsize 1
10883
10884 #define bfd_elf32_mkobject ppc_elf_mkobject
10885 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10886 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10887 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10888 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10889 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10890 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10891 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10892
10893 #define elf_backend_object_p ppc_elf_object_p
10894 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10895 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10896 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10897 #define elf_backend_relocate_section ppc_elf_relocate_section
10898 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10899 #define elf_backend_check_relocs ppc_elf_check_relocs
10900 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10901 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10902 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10903 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10904 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10905 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10906 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10907 #define elf_backend_fake_sections ppc_elf_fake_sections
10908 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10909 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10910 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10911 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10912 #define elf_backend_write_core_note ppc_elf_write_core_note
10913 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10914 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10915 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10916 #define elf_backend_write_section ppc_elf_write_section
10917 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10918 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10919 #define elf_backend_action_discarded ppc_elf_action_discarded
10920 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10921 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10922
10923 #include "elf32-target.h"
10924
10925 /* FreeBSD Target */
10926
10927 #undef TARGET_LITTLE_SYM
10928 #undef TARGET_LITTLE_NAME
10929
10930 #undef TARGET_BIG_SYM
10931 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10932 #undef TARGET_BIG_NAME
10933 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10934
10935 #undef ELF_OSABI
10936 #define ELF_OSABI ELFOSABI_FREEBSD
10937
10938 #undef elf32_bed
10939 #define elf32_bed elf32_powerpc_fbsd_bed
10940
10941 #include "elf32-target.h"
10942
10943 /* VxWorks Target */
10944
10945 #undef TARGET_LITTLE_SYM
10946 #undef TARGET_LITTLE_NAME
10947
10948 #undef TARGET_BIG_SYM
10949 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10950 #undef TARGET_BIG_NAME
10951 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10952
10953 #undef ELF_OSABI
10954
10955 /* VxWorks uses the elf default section flags for .plt. */
10956 static const struct bfd_elf_special_section *
10957 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10958 {
10959 if (sec->name == NULL)
10960 return NULL;
10961
10962 if (strcmp (sec->name, ".plt") == 0)
10963 return _bfd_elf_get_sec_type_attr (abfd, sec);
10964
10965 return ppc_elf_get_sec_type_attr (abfd, sec);
10966 }
10967
10968 /* Like ppc_elf_link_hash_table_create, but overrides
10969 appropriately for VxWorks. */
10970 static struct bfd_link_hash_table *
10971 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10972 {
10973 struct bfd_link_hash_table *ret;
10974
10975 ret = ppc_elf_link_hash_table_create (abfd);
10976 if (ret)
10977 {
10978 struct ppc_elf_link_hash_table *htab
10979 = (struct ppc_elf_link_hash_table *)ret;
10980 htab->is_vxworks = 1;
10981 htab->plt_type = PLT_VXWORKS;
10982 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10983 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10984 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10985 }
10986 return ret;
10987 }
10988
10989 /* Tweak magic VxWorks symbols as they are loaded. */
10990 static bfd_boolean
10991 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10992 struct bfd_link_info *info,
10993 Elf_Internal_Sym *sym,
10994 const char **namep ATTRIBUTE_UNUSED,
10995 flagword *flagsp ATTRIBUTE_UNUSED,
10996 asection **secp,
10997 bfd_vma *valp)
10998 {
10999 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
11000 valp))
11001 return FALSE;
11002
11003 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
11004 }
11005
11006 static void
11007 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11008 {
11009 ppc_elf_final_write_processing(abfd, linker);
11010 elf_vxworks_final_write_processing(abfd, linker);
11011 }
11012
11013 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11014 define it. */
11015 #undef elf_backend_want_plt_sym
11016 #define elf_backend_want_plt_sym 1
11017 #undef elf_backend_want_got_plt
11018 #define elf_backend_want_got_plt 1
11019 #undef elf_backend_got_symbol_offset
11020 #define elf_backend_got_symbol_offset 0
11021 #undef elf_backend_plt_not_loaded
11022 #define elf_backend_plt_not_loaded 0
11023 #undef elf_backend_plt_readonly
11024 #define elf_backend_plt_readonly 1
11025 #undef elf_backend_got_header_size
11026 #define elf_backend_got_header_size 12
11027
11028 #undef bfd_elf32_get_synthetic_symtab
11029
11030 #undef bfd_elf32_bfd_link_hash_table_create
11031 #define bfd_elf32_bfd_link_hash_table_create \
11032 ppc_elf_vxworks_link_hash_table_create
11033 #undef elf_backend_add_symbol_hook
11034 #define elf_backend_add_symbol_hook \
11035 ppc_elf_vxworks_add_symbol_hook
11036 #undef elf_backend_link_output_symbol_hook
11037 #define elf_backend_link_output_symbol_hook \
11038 elf_vxworks_link_output_symbol_hook
11039 #undef elf_backend_final_write_processing
11040 #define elf_backend_final_write_processing \
11041 ppc_elf_vxworks_final_write_processing
11042 #undef elf_backend_get_sec_type_attr
11043 #define elf_backend_get_sec_type_attr \
11044 ppc_elf_vxworks_get_sec_type_attr
11045 #undef elf_backend_emit_relocs
11046 #define elf_backend_emit_relocs \
11047 elf_vxworks_emit_relocs
11048
11049 #undef elf32_bed
11050 #define elf32_bed ppc_elf_vxworks_bed
11051 #undef elf_backend_post_process_headers
11052
11053 #include "elf32-target.h"
GDB Binutils - Deliverables
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