?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
gas/
[binutils.git] / bfd / elf32-ppc.c
blob6287921fa0d874aa1c4ef0f92637ccfe746e9a5a
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
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 "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc.h"
34 #include "elf32-ppc.h"
35
36 /* RELA relocations are used here. */
37
38 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40 static bfd_reloc_status_type ppc_elf_unhandled_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42
43 /* Branch prediction bit for branch taken relocs. */
44 #define BRANCH_PREDICT_BIT 0x200000
45 /* Mask to set RA in memory instructions. */
46 #define RA_REGISTER_MASK 0x001f0000
47 /* Value to shift register by to insert RA. */
48 #define RA_REGISTER_SHIFT 16
49
50 /* The name of the dynamic interpreter. This is put in the .interp
51 section. */
52 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
53
54 /* The size in bytes of an entry in the procedure linkage table. */
55 #define PLT_ENTRY_SIZE 12
56 /* The initial size of the plt reserved for the dynamic linker. */
57 #define PLT_INITIAL_ENTRY_SIZE 72
58 /* The size of the gap between entries in the PLT. */
59 #define PLT_SLOT_SIZE 8
60 /* The number of single-slot PLT entries (the rest use two slots). */
61 #define PLT_NUM_SINGLE_ENTRIES 8192
62
63 /* Some nop instructions. */
64 #define NOP 0x60000000
65 #define CROR_151515 0x4def7b82
66 #define CROR_313131 0x4ffffb82
67
68 /* Offset of tp and dtp pointers from start of TLS block. */
69 #define TP_OFFSET 0x7000
70 #define DTP_OFFSET 0x8000
71 \f
72 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
73
74 static reloc_howto_type ppc_elf_howto_raw[] = {
75 /* This reloc does nothing. */
76 HOWTO (R_PPC_NONE, /* type */
77 0, /* rightshift */
78 2, /* size (0 = byte, 1 = short, 2 = long) */
79 32, /* bitsize */
80 FALSE, /* pc_relative */
81 0, /* bitpos */
82 complain_overflow_bitfield, /* complain_on_overflow */
83 bfd_elf_generic_reloc, /* special_function */
84 "R_PPC_NONE", /* name */
85 FALSE, /* partial_inplace */
86 0, /* src_mask */
87 0, /* dst_mask */
88 FALSE), /* pcrel_offset */
89
90 /* A standard 32 bit relocation. */
91 HOWTO (R_PPC_ADDR32, /* type */
92 0, /* rightshift */
93 2, /* size (0 = byte, 1 = short, 2 = long) */
94 32, /* bitsize */
95 FALSE, /* pc_relative */
96 0, /* bitpos */
97 complain_overflow_bitfield, /* complain_on_overflow */
98 bfd_elf_generic_reloc, /* special_function */
99 "R_PPC_ADDR32", /* name */
100 FALSE, /* partial_inplace */
101 0, /* src_mask */
102 0xffffffff, /* dst_mask */
103 FALSE), /* pcrel_offset */
104
105 /* An absolute 26 bit branch; the lower two bits must be zero.
106 FIXME: we don't check that, we just clear them. */
107 HOWTO (R_PPC_ADDR24, /* type */
108 0, /* rightshift */
109 2, /* size (0 = byte, 1 = short, 2 = long) */
110 26, /* bitsize */
111 FALSE, /* pc_relative */
112 0, /* bitpos */
113 complain_overflow_bitfield, /* complain_on_overflow */
114 bfd_elf_generic_reloc, /* special_function */
115 "R_PPC_ADDR24", /* name */
116 FALSE, /* partial_inplace */
117 0, /* src_mask */
118 0x3fffffc, /* dst_mask */
119 FALSE), /* pcrel_offset */
120
121 /* A standard 16 bit relocation. */
122 HOWTO (R_PPC_ADDR16, /* type */
123 0, /* rightshift */
124 1, /* size (0 = byte, 1 = short, 2 = long) */
125 16, /* bitsize */
126 FALSE, /* pc_relative */
127 0, /* bitpos */
128 complain_overflow_bitfield, /* complain_on_overflow */
129 bfd_elf_generic_reloc, /* special_function */
130 "R_PPC_ADDR16", /* name */
131 FALSE, /* partial_inplace */
132 0, /* src_mask */
133 0xffff, /* dst_mask */
134 FALSE), /* pcrel_offset */
135
136 /* A 16 bit relocation without overflow. */
137 HOWTO (R_PPC_ADDR16_LO, /* type */
138 0, /* rightshift */
139 1, /* size (0 = byte, 1 = short, 2 = long) */
140 16, /* bitsize */
141 FALSE, /* pc_relative */
142 0, /* bitpos */
143 complain_overflow_dont,/* complain_on_overflow */
144 bfd_elf_generic_reloc, /* special_function */
145 "R_PPC_ADDR16_LO", /* name */
146 FALSE, /* partial_inplace */
147 0, /* src_mask */
148 0xffff, /* dst_mask */
149 FALSE), /* pcrel_offset */
150
151 /* The high order 16 bits of an address. */
152 HOWTO (R_PPC_ADDR16_HI, /* type */
153 16, /* rightshift */
154 1, /* size (0 = byte, 1 = short, 2 = long) */
155 16, /* bitsize */
156 FALSE, /* pc_relative */
157 0, /* bitpos */
158 complain_overflow_dont, /* complain_on_overflow */
159 bfd_elf_generic_reloc, /* special_function */
160 "R_PPC_ADDR16_HI", /* name */
161 FALSE, /* partial_inplace */
162 0, /* src_mask */
163 0xffff, /* dst_mask */
164 FALSE), /* pcrel_offset */
165
166 /* The high order 16 bits of an address, plus 1 if the contents of
167 the low 16 bits, treated as a signed number, is negative. */
168 HOWTO (R_PPC_ADDR16_HA, /* type */
169 16, /* rightshift */
170 1, /* size (0 = byte, 1 = short, 2 = long) */
171 16, /* bitsize */
172 FALSE, /* pc_relative */
173 0, /* bitpos */
174 complain_overflow_dont, /* complain_on_overflow */
175 ppc_elf_addr16_ha_reloc, /* special_function */
176 "R_PPC_ADDR16_HA", /* name */
177 FALSE, /* partial_inplace */
178 0, /* src_mask */
179 0xffff, /* dst_mask */
180 FALSE), /* pcrel_offset */
181
182 /* An absolute 16 bit branch; the lower two bits must be zero.
183 FIXME: we don't check that, we just clear them. */
184 HOWTO (R_PPC_ADDR14, /* type */
185 0, /* rightshift */
186 2, /* size (0 = byte, 1 = short, 2 = long) */
187 16, /* bitsize */
188 FALSE, /* pc_relative */
189 0, /* bitpos */
190 complain_overflow_bitfield, /* complain_on_overflow */
191 bfd_elf_generic_reloc, /* special_function */
192 "R_PPC_ADDR14", /* name */
193 FALSE, /* partial_inplace */
194 0, /* src_mask */
195 0xfffc, /* dst_mask */
196 FALSE), /* pcrel_offset */
197
198 /* An absolute 16 bit branch, for which bit 10 should be set to
199 indicate that the branch is expected to be taken. The lower two
200 bits must be zero. */
201 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
202 0, /* rightshift */
203 2, /* size (0 = byte, 1 = short, 2 = long) */
204 16, /* bitsize */
205 FALSE, /* pc_relative */
206 0, /* bitpos */
207 complain_overflow_bitfield, /* complain_on_overflow */
208 bfd_elf_generic_reloc, /* special_function */
209 "R_PPC_ADDR14_BRTAKEN",/* name */
210 FALSE, /* partial_inplace */
211 0, /* src_mask */
212 0xfffc, /* dst_mask */
213 FALSE), /* pcrel_offset */
214
215 /* An absolute 16 bit branch, for which bit 10 should be set to
216 indicate that the branch is not expected to be taken. The lower
217 two bits must be zero. */
218 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
219 0, /* rightshift */
220 2, /* size (0 = byte, 1 = short, 2 = long) */
221 16, /* bitsize */
222 FALSE, /* pc_relative */
223 0, /* bitpos */
224 complain_overflow_bitfield, /* complain_on_overflow */
225 bfd_elf_generic_reloc, /* special_function */
226 "R_PPC_ADDR14_BRNTAKEN",/* name */
227 FALSE, /* partial_inplace */
228 0, /* src_mask */
229 0xfffc, /* dst_mask */
230 FALSE), /* pcrel_offset */
231
232 /* A relative 26 bit branch; the lower two bits must be zero. */
233 HOWTO (R_PPC_REL24, /* type */
234 0, /* rightshift */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
236 26, /* bitsize */
237 TRUE, /* pc_relative */
238 0, /* bitpos */
239 complain_overflow_signed, /* complain_on_overflow */
240 bfd_elf_generic_reloc, /* special_function */
241 "R_PPC_REL24", /* name */
242 FALSE, /* partial_inplace */
243 0, /* src_mask */
244 0x3fffffc, /* dst_mask */
245 TRUE), /* pcrel_offset */
246
247 /* A relative 16 bit branch; the lower two bits must be zero. */
248 HOWTO (R_PPC_REL14, /* type */
249 0, /* rightshift */
250 2, /* size (0 = byte, 1 = short, 2 = long) */
251 16, /* bitsize */
252 TRUE, /* pc_relative */
253 0, /* bitpos */
254 complain_overflow_signed, /* complain_on_overflow */
255 bfd_elf_generic_reloc, /* special_function */
256 "R_PPC_REL14", /* name */
257 FALSE, /* partial_inplace */
258 0, /* src_mask */
259 0xfffc, /* dst_mask */
260 TRUE), /* pcrel_offset */
261
262 /* A relative 16 bit branch. Bit 10 should be set to indicate that
263 the branch is expected to be taken. The lower two bits must be
264 zero. */
265 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
266 0, /* rightshift */
267 2, /* size (0 = byte, 1 = short, 2 = long) */
268 16, /* bitsize */
269 TRUE, /* pc_relative */
270 0, /* bitpos */
271 complain_overflow_signed, /* complain_on_overflow */
272 bfd_elf_generic_reloc, /* special_function */
273 "R_PPC_REL14_BRTAKEN", /* name */
274 FALSE, /* partial_inplace */
275 0, /* src_mask */
276 0xfffc, /* dst_mask */
277 TRUE), /* pcrel_offset */
278
279 /* A relative 16 bit branch. Bit 10 should be set to indicate that
280 the branch is not expected to be taken. The lower two bits must
281 be zero. */
282 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
283 0, /* rightshift */
284 2, /* size (0 = byte, 1 = short, 2 = long) */
285 16, /* bitsize */
286 TRUE, /* pc_relative */
287 0, /* bitpos */
288 complain_overflow_signed, /* complain_on_overflow */
289 bfd_elf_generic_reloc, /* special_function */
290 "R_PPC_REL14_BRNTAKEN",/* name */
291 FALSE, /* partial_inplace */
292 0, /* src_mask */
293 0xfffc, /* dst_mask */
294 TRUE), /* pcrel_offset */
295
296 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
297 symbol. */
298 HOWTO (R_PPC_GOT16, /* type */
299 0, /* rightshift */
300 1, /* size (0 = byte, 1 = short, 2 = long) */
301 16, /* bitsize */
302 FALSE, /* pc_relative */
303 0, /* bitpos */
304 complain_overflow_signed, /* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_PPC_GOT16", /* name */
307 FALSE, /* partial_inplace */
308 0, /* src_mask */
309 0xffff, /* dst_mask */
310 FALSE), /* pcrel_offset */
311
312 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
313 the symbol. */
314 HOWTO (R_PPC_GOT16_LO, /* type */
315 0, /* rightshift */
316 1, /* size (0 = byte, 1 = short, 2 = long) */
317 16, /* bitsize */
318 FALSE, /* pc_relative */
319 0, /* bitpos */
320 complain_overflow_dont, /* complain_on_overflow */
321 bfd_elf_generic_reloc, /* special_function */
322 "R_PPC_GOT16_LO", /* name */
323 FALSE, /* partial_inplace */
324 0, /* src_mask */
325 0xffff, /* dst_mask */
326 FALSE), /* pcrel_offset */
327
328 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
329 the symbol. */
330 HOWTO (R_PPC_GOT16_HI, /* type */
331 16, /* rightshift */
332 1, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_GOT16_HI", /* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xffff, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
345 the symbol. */
346 HOWTO (R_PPC_GOT16_HA, /* type */
347 16, /* rightshift */
348 1, /* size (0 = byte, 1 = short, 2 = long) */
349 16, /* bitsize */
350 FALSE, /* pc_relative */
351 0, /* bitpos */
352 complain_overflow_bitfield, /* complain_on_overflow */
353 ppc_elf_addr16_ha_reloc, /* special_function */
354 "R_PPC_GOT16_HA", /* name */
355 FALSE, /* partial_inplace */
356 0, /* src_mask */
357 0xffff, /* dst_mask */
358 FALSE), /* pcrel_offset */
359
360 /* Like R_PPC_REL24, but referring to the procedure linkage table
361 entry for the symbol. */
362 HOWTO (R_PPC_PLTREL24, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 26, /* bitsize */
366 TRUE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_signed, /* complain_on_overflow */
369 bfd_elf_generic_reloc, /* special_function */
370 "R_PPC_PLTREL24", /* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 0x3fffffc, /* dst_mask */
374 TRUE), /* pcrel_offset */
375
376 /* This is used only by the dynamic linker. The symbol should exist
377 both in the object being run and in some shared library. The
378 dynamic linker copies the data addressed by the symbol from the
379 shared library into the object, because the object being
380 run has to have the data at some particular address. */
381 HOWTO (R_PPC_COPY, /* type */
382 0, /* rightshift */
383 2, /* size (0 = byte, 1 = short, 2 = long) */
384 32, /* bitsize */
385 FALSE, /* pc_relative */
386 0, /* bitpos */
387 complain_overflow_bitfield, /* complain_on_overflow */
388 bfd_elf_generic_reloc, /* special_function */
389 "R_PPC_COPY", /* name */
390 FALSE, /* partial_inplace */
391 0, /* src_mask */
392 0, /* dst_mask */
393 FALSE), /* pcrel_offset */
394
395 /* Like R_PPC_ADDR32, but used when setting global offset table
396 entries. */
397 HOWTO (R_PPC_GLOB_DAT, /* type */
398 0, /* rightshift */
399 2, /* size (0 = byte, 1 = short, 2 = long) */
400 32, /* bitsize */
401 FALSE, /* pc_relative */
402 0, /* bitpos */
403 complain_overflow_bitfield, /* complain_on_overflow */
404 bfd_elf_generic_reloc, /* special_function */
405 "R_PPC_GLOB_DAT", /* name */
406 FALSE, /* partial_inplace */
407 0, /* src_mask */
408 0xffffffff, /* dst_mask */
409 FALSE), /* pcrel_offset */
410
411 /* Marks a procedure linkage table entry for a symbol. */
412 HOWTO (R_PPC_JMP_SLOT, /* type */
413 0, /* rightshift */
414 2, /* size (0 = byte, 1 = short, 2 = long) */
415 32, /* bitsize */
416 FALSE, /* pc_relative */
417 0, /* bitpos */
418 complain_overflow_bitfield, /* complain_on_overflow */
419 bfd_elf_generic_reloc, /* special_function */
420 "R_PPC_JMP_SLOT", /* name */
421 FALSE, /* partial_inplace */
422 0, /* src_mask */
423 0, /* dst_mask */
424 FALSE), /* pcrel_offset */
425
426 /* Used only by the dynamic linker. When the object is run, this
427 longword is set to the load address of the object, plus the
428 addend. */
429 HOWTO (R_PPC_RELATIVE, /* type */
430 0, /* rightshift */
431 2, /* size (0 = byte, 1 = short, 2 = long) */
432 32, /* bitsize */
433 FALSE, /* pc_relative */
434 0, /* bitpos */
435 complain_overflow_bitfield, /* complain_on_overflow */
436 bfd_elf_generic_reloc, /* special_function */
437 "R_PPC_RELATIVE", /* name */
438 FALSE, /* partial_inplace */
439 0, /* src_mask */
440 0xffffffff, /* dst_mask */
441 FALSE), /* pcrel_offset */
442
443 /* Like R_PPC_REL24, but uses the value of the symbol within the
444 object rather than the final value. Normally used for
445 _GLOBAL_OFFSET_TABLE_. */
446 HOWTO (R_PPC_LOCAL24PC, /* type */
447 0, /* rightshift */
448 2, /* size (0 = byte, 1 = short, 2 = long) */
449 26, /* bitsize */
450 TRUE, /* pc_relative */
451 0, /* bitpos */
452 complain_overflow_signed, /* complain_on_overflow */
453 bfd_elf_generic_reloc, /* special_function */
454 "R_PPC_LOCAL24PC", /* name */
455 FALSE, /* partial_inplace */
456 0, /* src_mask */
457 0x3fffffc, /* dst_mask */
458 TRUE), /* pcrel_offset */
459
460 /* Like R_PPC_ADDR32, but may be unaligned. */
461 HOWTO (R_PPC_UADDR32, /* type */
462 0, /* rightshift */
463 2, /* size (0 = byte, 1 = short, 2 = long) */
464 32, /* bitsize */
465 FALSE, /* pc_relative */
466 0, /* bitpos */
467 complain_overflow_bitfield, /* complain_on_overflow */
468 bfd_elf_generic_reloc, /* special_function */
469 "R_PPC_UADDR32", /* name */
470 FALSE, /* partial_inplace */
471 0, /* src_mask */
472 0xffffffff, /* dst_mask */
473 FALSE), /* pcrel_offset */
474
475 /* Like R_PPC_ADDR16, but may be unaligned. */
476 HOWTO (R_PPC_UADDR16, /* type */
477 0, /* rightshift */
478 1, /* size (0 = byte, 1 = short, 2 = long) */
479 16, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_bitfield, /* complain_on_overflow */
483 bfd_elf_generic_reloc, /* special_function */
484 "R_PPC_UADDR16", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0xffff, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* 32-bit PC relative */
491 HOWTO (R_PPC_REL32, /* type */
492 0, /* rightshift */
493 2, /* size (0 = byte, 1 = short, 2 = long) */
494 32, /* bitsize */
495 TRUE, /* pc_relative */
496 0, /* bitpos */
497 complain_overflow_bitfield, /* complain_on_overflow */
498 bfd_elf_generic_reloc, /* special_function */
499 "R_PPC_REL32", /* name */
500 FALSE, /* partial_inplace */
501 0, /* src_mask */
502 0xffffffff, /* dst_mask */
503 TRUE), /* pcrel_offset */
504
505 /* 32-bit relocation to the symbol's procedure linkage table.
506 FIXME: not supported. */
507 HOWTO (R_PPC_PLT32, /* type */
508 0, /* rightshift */
509 2, /* size (0 = byte, 1 = short, 2 = long) */
510 32, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_bitfield, /* complain_on_overflow */
514 bfd_elf_generic_reloc, /* special_function */
515 "R_PPC_PLT32", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
522 FIXME: not supported. */
523 HOWTO (R_PPC_PLTREL32, /* type */
524 0, /* rightshift */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
526 32, /* bitsize */
527 TRUE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_bitfield, /* complain_on_overflow */
530 bfd_elf_generic_reloc, /* special_function */
531 "R_PPC_PLTREL32", /* name */
532 FALSE, /* partial_inplace */
533 0, /* src_mask */
534 0, /* dst_mask */
535 TRUE), /* pcrel_offset */
536
537 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
538 the symbol. */
539 HOWTO (R_PPC_PLT16_LO, /* type */
540 0, /* rightshift */
541 1, /* size (0 = byte, 1 = short, 2 = long) */
542 16, /* bitsize */
543 FALSE, /* pc_relative */
544 0, /* bitpos */
545 complain_overflow_dont, /* complain_on_overflow */
546 bfd_elf_generic_reloc, /* special_function */
547 "R_PPC_PLT16_LO", /* name */
548 FALSE, /* partial_inplace */
549 0, /* src_mask */
550 0xffff, /* dst_mask */
551 FALSE), /* pcrel_offset */
552
553 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
554 the symbol. */
555 HOWTO (R_PPC_PLT16_HI, /* type */
556 16, /* rightshift */
557 1, /* size (0 = byte, 1 = short, 2 = long) */
558 16, /* bitsize */
559 FALSE, /* pc_relative */
560 0, /* bitpos */
561 complain_overflow_bitfield, /* complain_on_overflow */
562 bfd_elf_generic_reloc, /* special_function */
563 "R_PPC_PLT16_HI", /* name */
564 FALSE, /* partial_inplace */
565 0, /* src_mask */
566 0xffff, /* dst_mask */
567 FALSE), /* pcrel_offset */
568
569 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
570 the symbol. */
571 HOWTO (R_PPC_PLT16_HA, /* type */
572 16, /* rightshift */
573 1, /* size (0 = byte, 1 = short, 2 = long) */
574 16, /* bitsize */
575 FALSE, /* pc_relative */
576 0, /* bitpos */
577 complain_overflow_bitfield, /* complain_on_overflow */
578 ppc_elf_addr16_ha_reloc, /* special_function */
579 "R_PPC_PLT16_HA", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
584
585 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
586 small data items. */
587 HOWTO (R_PPC_SDAREL16, /* 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_signed, /* complain_on_overflow */
594 bfd_elf_generic_reloc, /* special_function */
595 "R_PPC_SDAREL16", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 0xffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* 16-bit section relative relocation. */
602 HOWTO (R_PPC_SECTOFF, /* type */
603 0, /* rightshift */
604 1, /* size (0 = byte, 1 = short, 2 = long) */
605 16, /* bitsize */
606 FALSE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_bitfield, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC_SECTOFF", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0xffff, /* dst_mask */
614 FALSE), /* pcrel_offset */
615
616 /* 16-bit lower half section relative relocation. */
617 HOWTO (R_PPC_SECTOFF_LO, /* type */
618 0, /* rightshift */
619 1, /* size (0 = byte, 1 = short, 2 = long) */
620 16, /* bitsize */
621 FALSE, /* pc_relative */
622 0, /* bitpos */
623 complain_overflow_dont, /* complain_on_overflow */
624 bfd_elf_generic_reloc, /* special_function */
625 "R_PPC_SECTOFF_LO", /* name */
626 FALSE, /* partial_inplace */
627 0, /* src_mask */
628 0xffff, /* dst_mask */
629 FALSE), /* pcrel_offset */
630
631 /* 16-bit upper half section relative relocation. */
632 HOWTO (R_PPC_SECTOFF_HI, /* type */
633 16, /* rightshift */
634 1, /* size (0 = byte, 1 = short, 2 = long) */
635 16, /* bitsize */
636 FALSE, /* pc_relative */
637 0, /* bitpos */
638 complain_overflow_bitfield, /* complain_on_overflow */
639 bfd_elf_generic_reloc, /* special_function */
640 "R_PPC_SECTOFF_HI", /* name */
641 FALSE, /* partial_inplace */
642 0, /* src_mask */
643 0xffff, /* dst_mask */
644 FALSE), /* pcrel_offset */
645
646 /* 16-bit upper half adjusted section relative relocation. */
647 HOWTO (R_PPC_SECTOFF_HA, /* type */
648 16, /* rightshift */
649 1, /* size (0 = byte, 1 = short, 2 = long) */
650 16, /* bitsize */
651 FALSE, /* pc_relative */
652 0, /* bitpos */
653 complain_overflow_bitfield, /* complain_on_overflow */
654 ppc_elf_addr16_ha_reloc, /* special_function */
655 "R_PPC_SECTOFF_HA", /* name */
656 FALSE, /* partial_inplace */
657 0, /* src_mask */
658 0xffff, /* dst_mask */
659 FALSE), /* pcrel_offset */
660
661 /* Marker reloc for TLS. */
662 HOWTO (R_PPC_TLS,
663 0, /* rightshift */
664 2, /* size (0 = byte, 1 = short, 2 = long) */
665 32, /* bitsize */
666 FALSE, /* pc_relative */
667 0, /* bitpos */
668 complain_overflow_dont, /* complain_on_overflow */
669 bfd_elf_generic_reloc, /* special_function */
670 "R_PPC_TLS", /* name */
671 FALSE, /* partial_inplace */
672 0, /* src_mask */
673 0, /* dst_mask */
674 FALSE), /* pcrel_offset */
675
676 /* Computes the load module index of the load module that contains the
677 definition of its TLS sym. */
678 HOWTO (R_PPC_DTPMOD32,
679 0, /* rightshift */
680 2, /* size (0 = byte, 1 = short, 2 = long) */
681 32, /* bitsize */
682 FALSE, /* pc_relative */
683 0, /* bitpos */
684 complain_overflow_dont, /* complain_on_overflow */
685 ppc_elf_unhandled_reloc, /* special_function */
686 "R_PPC_DTPMOD32", /* name */
687 FALSE, /* partial_inplace */
688 0, /* src_mask */
689 0xffffffff, /* dst_mask */
690 FALSE), /* pcrel_offset */
691
692 /* Computes a dtv-relative displacement, the difference between the value
693 of sym+add and the base address of the thread-local storage block that
694 contains the definition of sym, minus 0x8000. */
695 HOWTO (R_PPC_DTPREL32,
696 0, /* rightshift */
697 2, /* size (0 = byte, 1 = short, 2 = long) */
698 32, /* bitsize */
699 FALSE, /* pc_relative */
700 0, /* bitpos */
701 complain_overflow_dont, /* complain_on_overflow */
702 ppc_elf_unhandled_reloc, /* special_function */
703 "R_PPC_DTPREL32", /* name */
704 FALSE, /* partial_inplace */
705 0, /* src_mask */
706 0xffffffff, /* dst_mask */
707 FALSE), /* pcrel_offset */
708
709 /* A 16 bit dtprel reloc. */
710 HOWTO (R_PPC_DTPREL16,
711 0, /* rightshift */
712 1, /* size (0 = byte, 1 = short, 2 = long) */
713 16, /* bitsize */
714 FALSE, /* pc_relative */
715 0, /* bitpos */
716 complain_overflow_signed, /* complain_on_overflow */
717 ppc_elf_unhandled_reloc, /* special_function */
718 "R_PPC_DTPREL16", /* name */
719 FALSE, /* partial_inplace */
720 0, /* src_mask */
721 0xffff, /* dst_mask */
722 FALSE), /* pcrel_offset */
723
724 /* Like DTPREL16, but no overflow. */
725 HOWTO (R_PPC_DTPREL16_LO,
726 0, /* rightshift */
727 1, /* size (0 = byte, 1 = short, 2 = long) */
728 16, /* bitsize */
729 FALSE, /* pc_relative */
730 0, /* bitpos */
731 complain_overflow_dont, /* complain_on_overflow */
732 ppc_elf_unhandled_reloc, /* special_function */
733 "R_PPC_DTPREL16_LO", /* name */
734 FALSE, /* partial_inplace */
735 0, /* src_mask */
736 0xffff, /* dst_mask */
737 FALSE), /* pcrel_offset */
738
739 /* Like DTPREL16_LO, but next higher group of 16 bits. */
740 HOWTO (R_PPC_DTPREL16_HI,
741 16, /* rightshift */
742 1, /* size (0 = byte, 1 = short, 2 = long) */
743 16, /* bitsize */
744 FALSE, /* pc_relative */
745 0, /* bitpos */
746 complain_overflow_dont, /* complain_on_overflow */
747 ppc_elf_unhandled_reloc, /* special_function */
748 "R_PPC_DTPREL16_HI", /* name */
749 FALSE, /* partial_inplace */
750 0, /* src_mask */
751 0xffff, /* dst_mask */
752 FALSE), /* pcrel_offset */
753
754 /* Like DTPREL16_HI, but adjust for low 16 bits. */
755 HOWTO (R_PPC_DTPREL16_HA,
756 16, /* rightshift */
757 1, /* size (0 = byte, 1 = short, 2 = long) */
758 16, /* bitsize */
759 FALSE, /* pc_relative */
760 0, /* bitpos */
761 complain_overflow_dont, /* complain_on_overflow */
762 ppc_elf_unhandled_reloc, /* special_function */
763 "R_PPC_DTPREL16_HA", /* name */
764 FALSE, /* partial_inplace */
765 0, /* src_mask */
766 0xffff, /* dst_mask */
767 FALSE), /* pcrel_offset */
768
769 /* Computes a tp-relative displacement, the difference between the value of
770 sym+add and the value of the thread pointer (r13). */
771 HOWTO (R_PPC_TPREL32,
772 0, /* rightshift */
773 2, /* size (0 = byte, 1 = short, 2 = long) */
774 32, /* bitsize */
775 FALSE, /* pc_relative */
776 0, /* bitpos */
777 complain_overflow_dont, /* complain_on_overflow */
778 ppc_elf_unhandled_reloc, /* special_function */
779 "R_PPC_TPREL32", /* name */
780 FALSE, /* partial_inplace */
781 0, /* src_mask */
782 0xffffffff, /* dst_mask */
783 FALSE), /* pcrel_offset */
784
785 /* A 16 bit tprel reloc. */
786 HOWTO (R_PPC_TPREL16,
787 0, /* rightshift */
788 1, /* size (0 = byte, 1 = short, 2 = long) */
789 16, /* bitsize */
790 FALSE, /* pc_relative */
791 0, /* bitpos */
792 complain_overflow_signed, /* complain_on_overflow */
793 ppc_elf_unhandled_reloc, /* special_function */
794 "R_PPC_TPREL16", /* name */
795 FALSE, /* partial_inplace */
796 0, /* src_mask */
797 0xffff, /* dst_mask */
798 FALSE), /* pcrel_offset */
799
800 /* Like TPREL16, but no overflow. */
801 HOWTO (R_PPC_TPREL16_LO,
802 0, /* rightshift */
803 1, /* size (0 = byte, 1 = short, 2 = long) */
804 16, /* bitsize */
805 FALSE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_dont, /* complain_on_overflow */
808 ppc_elf_unhandled_reloc, /* special_function */
809 "R_PPC_TPREL16_LO", /* name */
810 FALSE, /* partial_inplace */
811 0, /* src_mask */
812 0xffff, /* dst_mask */
813 FALSE), /* pcrel_offset */
814
815 /* Like TPREL16_LO, but next higher group of 16 bits. */
816 HOWTO (R_PPC_TPREL16_HI,
817 16, /* rightshift */
818 1, /* size (0 = byte, 1 = short, 2 = long) */
819 16, /* bitsize */
820 FALSE, /* pc_relative */
821 0, /* bitpos */
822 complain_overflow_dont, /* complain_on_overflow */
823 ppc_elf_unhandled_reloc, /* special_function */
824 "R_PPC_TPREL16_HI", /* name */
825 FALSE, /* partial_inplace */
826 0, /* src_mask */
827 0xffff, /* dst_mask */
828 FALSE), /* pcrel_offset */
829
830 /* Like TPREL16_HI, but adjust for low 16 bits. */
831 HOWTO (R_PPC_TPREL16_HA,
832 16, /* rightshift */
833 1, /* size (0 = byte, 1 = short, 2 = long) */
834 16, /* bitsize */
835 FALSE, /* pc_relative */
836 0, /* bitpos */
837 complain_overflow_dont, /* complain_on_overflow */
838 ppc_elf_unhandled_reloc, /* special_function */
839 "R_PPC_TPREL16_HA", /* name */
840 FALSE, /* partial_inplace */
841 0, /* src_mask */
842 0xffff, /* dst_mask */
843 FALSE), /* pcrel_offset */
844
845 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
846 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
847 to the first entry. */
848 HOWTO (R_PPC_GOT_TLSGD16,
849 0, /* rightshift */
850 1, /* size (0 = byte, 1 = short, 2 = long) */
851 16, /* bitsize */
852 FALSE, /* pc_relative */
853 0, /* bitpos */
854 complain_overflow_signed, /* complain_on_overflow */
855 ppc_elf_unhandled_reloc, /* special_function */
856 "R_PPC_GOT_TLSGD16", /* name */
857 FALSE, /* partial_inplace */
858 0, /* src_mask */
859 0xffff, /* dst_mask */
860 FALSE), /* pcrel_offset */
861
862 /* Like GOT_TLSGD16, but no overflow. */
863 HOWTO (R_PPC_GOT_TLSGD16_LO,
864 0, /* rightshift */
865 1, /* size (0 = byte, 1 = short, 2 = long) */
866 16, /* bitsize */
867 FALSE, /* pc_relative */
868 0, /* bitpos */
869 complain_overflow_dont, /* complain_on_overflow */
870 ppc_elf_unhandled_reloc, /* special_function */
871 "R_PPC_GOT_TLSGD16_LO", /* name */
872 FALSE, /* partial_inplace */
873 0, /* src_mask */
874 0xffff, /* dst_mask */
875 FALSE), /* pcrel_offset */
876
877 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
878 HOWTO (R_PPC_GOT_TLSGD16_HI,
879 16, /* rightshift */
880 1, /* size (0 = byte, 1 = short, 2 = long) */
881 16, /* bitsize */
882 FALSE, /* pc_relative */
883 0, /* bitpos */
884 complain_overflow_dont, /* complain_on_overflow */
885 ppc_elf_unhandled_reloc, /* special_function */
886 "R_PPC_GOT_TLSGD16_HI", /* name */
887 FALSE, /* partial_inplace */
888 0, /* src_mask */
889 0xffff, /* dst_mask */
890 FALSE), /* pcrel_offset */
891
892 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
893 HOWTO (R_PPC_GOT_TLSGD16_HA,
894 16, /* rightshift */
895 1, /* size (0 = byte, 1 = short, 2 = long) */
896 16, /* bitsize */
897 FALSE, /* pc_relative */
898 0, /* bitpos */
899 complain_overflow_dont, /* complain_on_overflow */
900 ppc_elf_unhandled_reloc, /* special_function */
901 "R_PPC_GOT_TLSGD16_HA", /* name */
902 FALSE, /* partial_inplace */
903 0, /* src_mask */
904 0xffff, /* dst_mask */
905 FALSE), /* pcrel_offset */
906
907 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
908 with values (sym+add)@dtpmod and zero, and computes the offset to the
909 first entry. */
910 HOWTO (R_PPC_GOT_TLSLD16,
911 0, /* rightshift */
912 1, /* size (0 = byte, 1 = short, 2 = long) */
913 16, /* bitsize */
914 FALSE, /* pc_relative */
915 0, /* bitpos */
916 complain_overflow_signed, /* complain_on_overflow */
917 ppc_elf_unhandled_reloc, /* special_function */
918 "R_PPC_GOT_TLSLD16", /* name */
919 FALSE, /* partial_inplace */
920 0, /* src_mask */
921 0xffff, /* dst_mask */
922 FALSE), /* pcrel_offset */
923
924 /* Like GOT_TLSLD16, but no overflow. */
925 HOWTO (R_PPC_GOT_TLSLD16_LO,
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_dont, /* complain_on_overflow */
932 ppc_elf_unhandled_reloc, /* special_function */
933 "R_PPC_GOT_TLSLD16_LO", /* name */
934 FALSE, /* partial_inplace */
935 0, /* src_mask */
936 0xffff, /* dst_mask */
937 FALSE), /* pcrel_offset */
938
939 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
940 HOWTO (R_PPC_GOT_TLSLD16_HI,
941 16, /* 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_GOT_TLSLD16_HI", /* name */
949 FALSE, /* partial_inplace */
950 0, /* src_mask */
951 0xffff, /* dst_mask */
952 FALSE), /* pcrel_offset */
953
954 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
955 HOWTO (R_PPC_GOT_TLSLD16_HA,
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_GOT_TLSLD16_HA", /* name */
964 FALSE, /* partial_inplace */
965 0, /* src_mask */
966 0xffff, /* dst_mask */
967 FALSE), /* pcrel_offset */
968
969 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
970 the offset to the entry. */
971 HOWTO (R_PPC_GOT_DTPREL16,
972 0, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_signed, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_GOT_DTPREL16", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Like GOT_DTPREL16, but no overflow. */
986 HOWTO (R_PPC_GOT_DTPREL16_LO,
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc_elf_unhandled_reloc, /* special_function */
994 "R_PPC_GOT_DTPREL16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1001 HOWTO (R_PPC_GOT_DTPREL16_HI,
1002 16, /* rightshift */
1003 1, /* size (0 = byte, 1 = short, 2 = long) */
1004 16, /* bitsize */
1005 FALSE, /* pc_relative */
1006 0, /* bitpos */
1007 complain_overflow_dont, /* complain_on_overflow */
1008 ppc_elf_unhandled_reloc, /* special_function */
1009 "R_PPC_GOT_DTPREL16_HI", /* name */
1010 FALSE, /* partial_inplace */
1011 0, /* src_mask */
1012 0xffff, /* dst_mask */
1013 FALSE), /* pcrel_offset */
1014
1015 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1016 HOWTO (R_PPC_GOT_DTPREL16_HA,
1017 16, /* rightshift */
1018 1, /* size (0 = byte, 1 = short, 2 = long) */
1019 16, /* bitsize */
1020 FALSE, /* pc_relative */
1021 0, /* bitpos */
1022 complain_overflow_dont, /* complain_on_overflow */
1023 ppc_elf_unhandled_reloc, /* special_function */
1024 "R_PPC_GOT_DTPREL16_HA", /* name */
1025 FALSE, /* partial_inplace */
1026 0, /* src_mask */
1027 0xffff, /* dst_mask */
1028 FALSE), /* pcrel_offset */
1029
1030 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1031 offset to the entry. */
1032 HOWTO (R_PPC_GOT_TPREL16,
1033 0, /* rightshift */
1034 1, /* size (0 = byte, 1 = short, 2 = long) */
1035 16, /* bitsize */
1036 FALSE, /* pc_relative */
1037 0, /* bitpos */
1038 complain_overflow_signed, /* complain_on_overflow */
1039 ppc_elf_unhandled_reloc, /* special_function */
1040 "R_PPC_GOT_TPREL16", /* name */
1041 FALSE, /* partial_inplace */
1042 0, /* src_mask */
1043 0xffff, /* dst_mask */
1044 FALSE), /* pcrel_offset */
1045
1046 /* Like GOT_TPREL16, but no overflow. */
1047 HOWTO (R_PPC_GOT_TPREL16_LO,
1048 0, /* rightshift */
1049 1, /* size (0 = byte, 1 = short, 2 = long) */
1050 16, /* bitsize */
1051 FALSE, /* pc_relative */
1052 0, /* bitpos */
1053 complain_overflow_dont, /* complain_on_overflow */
1054 ppc_elf_unhandled_reloc, /* special_function */
1055 "R_PPC_GOT_TPREL16_LO", /* name */
1056 FALSE, /* partial_inplace */
1057 0, /* src_mask */
1058 0xffff, /* dst_mask */
1059 FALSE), /* pcrel_offset */
1060
1061 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1062 HOWTO (R_PPC_GOT_TPREL16_HI,
1063 16, /* rightshift */
1064 1, /* size (0 = byte, 1 = short, 2 = long) */
1065 16, /* bitsize */
1066 FALSE, /* pc_relative */
1067 0, /* bitpos */
1068 complain_overflow_dont, /* complain_on_overflow */
1069 ppc_elf_unhandled_reloc, /* special_function */
1070 "R_PPC_GOT_TPREL16_HI", /* name */
1071 FALSE, /* partial_inplace */
1072 0, /* src_mask */
1073 0xffff, /* dst_mask */
1074 FALSE), /* pcrel_offset */
1075
1076 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1077 HOWTO (R_PPC_GOT_TPREL16_HA,
1078 16, /* rightshift */
1079 1, /* size (0 = byte, 1 = short, 2 = long) */
1080 16, /* bitsize */
1081 FALSE, /* pc_relative */
1082 0, /* bitpos */
1083 complain_overflow_dont, /* complain_on_overflow */
1084 ppc_elf_unhandled_reloc, /* special_function */
1085 "R_PPC_GOT_TPREL16_HA", /* name */
1086 FALSE, /* partial_inplace */
1087 0, /* src_mask */
1088 0xffff, /* dst_mask */
1089 FALSE), /* pcrel_offset */
1090
1091 /* The remaining relocs are from the Embedded ELF ABI, and are not
1092 in the SVR4 ELF ABI. */
1093
1094 /* 32 bit value resulting from the addend minus the symbol. */
1095 HOWTO (R_PPC_EMB_NADDR32, /* type */
1096 0, /* rightshift */
1097 2, /* size (0 = byte, 1 = short, 2 = long) */
1098 32, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_bitfield, /* complain_on_overflow */
1102 bfd_elf_generic_reloc, /* special_function */
1103 "R_PPC_EMB_NADDR32", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffffffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* 16 bit value resulting from the addend minus the symbol. */
1110 HOWTO (R_PPC_EMB_NADDR16, /* type */
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_bitfield, /* complain_on_overflow */
1117 bfd_elf_generic_reloc, /* special_function */
1118 "R_PPC_EMB_NADDR16", /* name */
1119 FALSE, /* partial_inplace */
1120 0, /* src_mask */
1121 0xffff, /* dst_mask */
1122 FALSE), /* pcrel_offset */
1123
1124 /* 16 bit value resulting from the addend minus the symbol. */
1125 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
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 bfd_elf_generic_reloc, /* special_function */
1133 "R_PPC_EMB_ADDR16_LO", /* name */
1134 FALSE, /* partial_inplace */
1135 0, /* src_mask */
1136 0xffff, /* dst_mask */
1137 FALSE), /* pcrel_offset */
1138
1139 /* The high order 16 bits of the addend minus the symbol. */
1140 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
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 bfd_elf_generic_reloc, /* special_function */
1148 "R_PPC_EMB_NADDR16_HI", /* name */
1149 FALSE, /* partial_inplace */
1150 0, /* src_mask */
1151 0xffff, /* dst_mask */
1152 FALSE), /* pcrel_offset */
1153
1154 /* The high order 16 bits of the result of the addend minus the address,
1155 plus 1 if the contents of the low 16 bits, treated as a signed number,
1156 is negative. */
1157 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1158 16, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_dont, /* complain_on_overflow */
1164 ppc_elf_addr16_ha_reloc, /* special_function */
1165 "R_PPC_EMB_NADDR16_HA", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xffff, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* 16 bit value resulting from allocating a 4 byte word to hold an
1172 address in the .sdata section, and returning the offset from
1173 _SDA_BASE_ for that relocation. */
1174 HOWTO (R_PPC_EMB_SDAI16, /* type */
1175 0, /* rightshift */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1177 16, /* bitsize */
1178 FALSE, /* pc_relative */
1179 0, /* bitpos */
1180 complain_overflow_bitfield, /* complain_on_overflow */
1181 bfd_elf_generic_reloc, /* special_function */
1182 "R_PPC_EMB_SDAI16", /* name */
1183 FALSE, /* partial_inplace */
1184 0, /* src_mask */
1185 0xffff, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1187
1188 /* 16 bit value resulting from allocating a 4 byte word to hold an
1189 address in the .sdata2 section, and returning the offset from
1190 _SDA2_BASE_ for that relocation. */
1191 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1192 0, /* rightshift */
1193 1, /* size (0 = byte, 1 = short, 2 = long) */
1194 16, /* bitsize */
1195 FALSE, /* pc_relative */
1196 0, /* bitpos */
1197 complain_overflow_bitfield, /* complain_on_overflow */
1198 bfd_elf_generic_reloc, /* special_function */
1199 "R_PPC_EMB_SDA2I16", /* name */
1200 FALSE, /* partial_inplace */
1201 0, /* src_mask */
1202 0xffff, /* dst_mask */
1203 FALSE), /* pcrel_offset */
1204
1205 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1206 small data items. */
1207 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1208 0, /* rightshift */
1209 1, /* size (0 = byte, 1 = short, 2 = long) */
1210 16, /* bitsize */
1211 FALSE, /* pc_relative */
1212 0, /* bitpos */
1213 complain_overflow_signed, /* complain_on_overflow */
1214 bfd_elf_generic_reloc, /* special_function */
1215 "R_PPC_EMB_SDA2REL", /* name */
1216 FALSE, /* partial_inplace */
1217 0, /* src_mask */
1218 0xffff, /* dst_mask */
1219 FALSE), /* pcrel_offset */
1220
1221 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1222 signed offset from the appropriate base, and filling in the register
1223 field with the appropriate register (0, 2, or 13). */
1224 HOWTO (R_PPC_EMB_SDA21, /* type */
1225 0, /* rightshift */
1226 2, /* size (0 = byte, 1 = short, 2 = long) */
1227 16, /* bitsize */
1228 FALSE, /* pc_relative */
1229 0, /* bitpos */
1230 complain_overflow_signed, /* complain_on_overflow */
1231 bfd_elf_generic_reloc, /* special_function */
1232 "R_PPC_EMB_SDA21", /* name */
1233 FALSE, /* partial_inplace */
1234 0, /* src_mask */
1235 0xffff, /* dst_mask */
1236 FALSE), /* pcrel_offset */
1237
1238 /* Relocation not handled: R_PPC_EMB_MRKREF */
1239 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1240 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1241 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1242 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1243 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1244
1245 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1246 in the 16 bit signed offset from the appropriate base, and filling in the
1247 register field with the appropriate register (0, 2, or 13). */
1248 HOWTO (R_PPC_EMB_RELSDA, /* type */
1249 0, /* rightshift */
1250 1, /* size (0 = byte, 1 = short, 2 = long) */
1251 16, /* bitsize */
1252 TRUE, /* pc_relative */
1253 0, /* bitpos */
1254 complain_overflow_signed, /* complain_on_overflow */
1255 bfd_elf_generic_reloc, /* special_function */
1256 "R_PPC_EMB_RELSDA", /* name */
1257 FALSE, /* partial_inplace */
1258 0, /* src_mask */
1259 0xffff, /* dst_mask */
1260 FALSE), /* pcrel_offset */
1261
1262 /* GNU extension to record C++ vtable hierarchy. */
1263 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1264 0, /* rightshift */
1265 0, /* size (0 = byte, 1 = short, 2 = long) */
1266 0, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_dont, /* complain_on_overflow */
1270 NULL, /* special_function */
1271 "R_PPC_GNU_VTINHERIT", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* GNU extension to record C++ vtable member usage. */
1278 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1279 0, /* rightshift */
1280 0, /* size (0 = byte, 1 = short, 2 = long) */
1281 0, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_dont, /* complain_on_overflow */
1285 NULL, /* special_function */
1286 "R_PPC_GNU_VTENTRY", /* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 /* Phony reloc to handle AIX style TOC entries. */
1293 HOWTO (R_PPC_TOC16, /* type */
1294 0, /* rightshift */
1295 1, /* size (0 = byte, 1 = short, 2 = long) */
1296 16, /* bitsize */
1297 FALSE, /* pc_relative */
1298 0, /* bitpos */
1299 complain_overflow_signed, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 "R_PPC_TOC16", /* name */
1302 FALSE, /* partial_inplace */
1303 0, /* src_mask */
1304 0xffff, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1306 };
1307 \f
1308 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1309
1310 static void
1311 ppc_elf_howto_init (void)
1312 {
1313 unsigned int i, type;
1314
1315 for (i = 0;
1316 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1317 i++)
1318 {
1319 type = ppc_elf_howto_raw[i].type;
1320 if (type >= (sizeof (ppc_elf_howto_table)
1321 / sizeof (ppc_elf_howto_table[0])))
1322 abort ();
1323 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1324 }
1325 }
1326
1327 static reloc_howto_type *
1328 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1329 bfd_reloc_code_real_type code)
1330 {
1331 enum elf_ppc_reloc_type r;
1332
1333 /* Initialize howto table if not already done. */
1334 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1335 ppc_elf_howto_init ();
1336
1337 switch (code)
1338 {
1339 default:
1340 return NULL;
1341
1342 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1343 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1344 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1345 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1346 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1347 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1348 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1349 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1350 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1351 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1352 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1353 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1354 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1355 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1356 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1357 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1358 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1359 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1360 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1361 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1362 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1363 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1364 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1365 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1366 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1367 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1368 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1369 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1370 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1371 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1372 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1373 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1374 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1375 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1376 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1377 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1378 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1379 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1380 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1381 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1382 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1383 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1384 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1385 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1386 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1387 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1388 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1389 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1390 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1391 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1392 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1393 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1394 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1395 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1396 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1397 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1398 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1399 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1400 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1401 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1402 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1403 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1404 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1405 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1406 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1407 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1408 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1409 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1410 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1411 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1412 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1413 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1414 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1415 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1416 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1417 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1418 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1419 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1420 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1421 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1422 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1423 }
1424
1425 return ppc_elf_howto_table[r];
1426 };
1427
1428 /* Set the howto pointer for a PowerPC ELF reloc. */
1429
1430 static void
1431 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1432 arelent *cache_ptr,
1433 Elf_Internal_Rela *dst)
1434 {
1435 /* Initialize howto table if not already done. */
1436 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1437 ppc_elf_howto_init ();
1438
1439 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1440 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1441 }
1442
1443 /* Handle the R_PPC_ADDR16_HA reloc. */
1444
1445 static bfd_reloc_status_type
1446 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1447 arelent *reloc_entry,
1448 asymbol *symbol,
1449 void *data ATTRIBUTE_UNUSED,
1450 asection *input_section,
1451 bfd *output_bfd,
1452 char **error_message ATTRIBUTE_UNUSED)
1453 {
1454 bfd_vma relocation;
1455
1456 if (output_bfd != NULL)
1457 {
1458 reloc_entry->address += input_section->output_offset;
1459 return bfd_reloc_ok;
1460 }
1461
1462 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1463 return bfd_reloc_outofrange;
1464
1465 if (bfd_is_com_section (symbol->section))
1466 relocation = 0;
1467 else
1468 relocation = symbol->value;
1469
1470 relocation += symbol->section->output_section->vma;
1471 relocation += symbol->section->output_offset;
1472 relocation += reloc_entry->addend;
1473
1474 reloc_entry->addend += (relocation & 0x8000) << 1;
1475
1476 return bfd_reloc_continue;
1477 }
1478
1479 static bfd_reloc_status_type
1480 ppc_elf_unhandled_reloc (bfd *abfd,
1481 arelent *reloc_entry,
1482 asymbol *symbol,
1483 void *data,
1484 asection *input_section,
1485 bfd *output_bfd,
1486 char **error_message)
1487 {
1488 /* If this is a relocatable link (output_bfd test tells us), just
1489 call the generic function. Any adjustment will be done at final
1490 link time. */
1491 if (output_bfd != NULL)
1492 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1493 input_section, output_bfd, error_message);
1494
1495 if (error_message != NULL)
1496 {
1497 static char buf[60];
1498 sprintf (buf, _("generic linker can't handle %s"),
1499 reloc_entry->howto->name);
1500 *error_message = buf;
1501 }
1502 return bfd_reloc_dangerous;
1503 }
1504 \f
1505 /* Sections created by the linker. */
1506
1507 typedef struct elf_linker_section
1508 {
1509 /* Pointer to the bfd section. */
1510 asection *section;
1511 /* Section name. */
1512 const char *name;
1513 /* Associated bss section name. */
1514 const char *bss_name;
1515 /* Associated symbol name. */
1516 const char *sym_name;
1517 /* Value of symbol. */
1518 bfd_vma sym_val;
1519 } elf_linker_section_t;
1520
1521 /* Linked list of allocated pointer entries. This hangs off of the
1522 symbol lists, and provides allows us to return different pointers,
1523 based on different addend's. */
1524
1525 typedef struct elf_linker_section_pointers
1526 {
1527 /* next allocated pointer for this symbol */
1528 struct elf_linker_section_pointers *next;
1529 /* offset of pointer from beginning of section */
1530 bfd_vma offset;
1531 /* addend used */
1532 bfd_vma addend;
1533 /* which linker section this is */
1534 elf_linker_section_t *lsect;
1535 } elf_linker_section_pointers_t;
1536
1537 struct ppc_elf_obj_tdata
1538 {
1539 struct elf_obj_tdata elf;
1540
1541 /* A mapping from local symbols to offsets into the various linker
1542 sections added. This is index by the symbol index. */
1543 elf_linker_section_pointers_t **linker_section_pointers;
1544 };
1545
1546 #define ppc_elf_tdata(bfd) \
1547 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1548
1549 #define elf_local_ptr_offsets(bfd) \
1550 (ppc_elf_tdata (bfd)->linker_section_pointers)
1551
1552 /* Override the generic function because we store some extras. */
1553
1554 static bfd_boolean
1555 ppc_elf_mkobject (bfd *abfd)
1556 {
1557 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1558 abfd->tdata.any = bfd_zalloc (abfd, amt);
1559 if (abfd->tdata.any == NULL)
1560 return FALSE;
1561 return TRUE;
1562 }
1563
1564 /* Fix bad default arch selected for a 32 bit input bfd when the
1565 default is 64 bit. */
1566
1567 static bfd_boolean
1568 ppc_elf_object_p (bfd *abfd)
1569 {
1570 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1571 {
1572 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1573
1574 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1575 {
1576 /* Relies on arch after 64 bit default being 32 bit default. */
1577 abfd->arch_info = abfd->arch_info->next;
1578 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1579 }
1580 }
1581 return TRUE;
1582 }
1583
1584 /* Function to set whether a module needs the -mrelocatable bit set. */
1585
1586 static bfd_boolean
1587 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1588 {
1589 BFD_ASSERT (!elf_flags_init (abfd)
1590 || elf_elfheader (abfd)->e_flags == flags);
1591
1592 elf_elfheader (abfd)->e_flags = flags;
1593 elf_flags_init (abfd) = TRUE;
1594 return TRUE;
1595 }
1596
1597 /* Support for core dump NOTE sections. */
1598
1599 static bfd_boolean
1600 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1601 {
1602 int offset;
1603 unsigned int size;
1604
1605 switch (note->descsz)
1606 {
1607 default:
1608 return FALSE;
1609
1610 case 268: /* Linux/PPC. */
1611 /* pr_cursig */
1612 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1613
1614 /* pr_pid */
1615 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1616
1617 /* pr_reg */
1618 offset = 72;
1619 size = 192;
1620
1621 break;
1622 }
1623
1624 /* Make a ".reg/999" section. */
1625 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1626 size, note->descpos + offset);
1627 }
1628
1629 static bfd_boolean
1630 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1631 {
1632 switch (note->descsz)
1633 {
1634 default:
1635 return FALSE;
1636
1637 case 128: /* Linux/PPC elf_prpsinfo. */
1638 elf_tdata (abfd)->core_program
1639 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1640 elf_tdata (abfd)->core_command
1641 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1642 }
1643
1644 /* Note that for some reason, a spurious space is tacked
1645 onto the end of the args in some (at least one anyway)
1646 implementations, so strip it off if it exists. */
1647
1648 {
1649 char *command = elf_tdata (abfd)->core_command;
1650 int n = strlen (command);
1651
1652 if (0 < n && command[n - 1] == ' ')
1653 command[n - 1] = '\0';
1654 }
1655
1656 return TRUE;
1657 }
1658
1659 /* Return address for Ith PLT stub in section PLT, for relocation REL
1660 or (bfd_vma) -1 if it should not be included. */
1661
1662 static bfd_vma
1663 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1664 const asection *plt ATTRIBUTE_UNUSED,
1665 const arelent *rel)
1666 {
1667 return rel->address;
1668 }
1669
1670 /* Handle a PowerPC specific section when reading an object file. This
1671 is called when bfd_section_from_shdr finds a section with an unknown
1672 type. */
1673
1674 static bfd_boolean
1675 ppc_elf_section_from_shdr (bfd *abfd,
1676 Elf_Internal_Shdr *hdr,
1677 const char *name,
1678 int shindex)
1679 {
1680 asection *newsect;
1681 flagword flags;
1682
1683 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1684 return FALSE;
1685
1686 newsect = hdr->bfd_section;
1687 flags = bfd_get_section_flags (abfd, newsect);
1688 if (hdr->sh_flags & SHF_EXCLUDE)
1689 flags |= SEC_EXCLUDE;
1690
1691 if (hdr->sh_type == SHT_ORDERED)
1692 flags |= SEC_SORT_ENTRIES;
1693
1694 bfd_set_section_flags (abfd, newsect, flags);
1695 return TRUE;
1696 }
1697
1698 /* Set up any other section flags and such that may be necessary. */
1699
1700 static bfd_boolean
1701 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1702 Elf_Internal_Shdr *shdr,
1703 asection *asect)
1704 {
1705 if ((asect->flags & SEC_EXCLUDE) != 0)
1706 shdr->sh_flags |= SHF_EXCLUDE;
1707
1708 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1709 shdr->sh_type = SHT_ORDERED;
1710
1711 return TRUE;
1712 }
1713
1714 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1715 need to bump up the number of section headers. */
1716
1717 static int
1718 ppc_elf_additional_program_headers (bfd *abfd)
1719 {
1720 asection *s;
1721 int ret = 0;
1722
1723 s = bfd_get_section_by_name (abfd, ".sbss2");
1724 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1725 ++ret;
1726
1727 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1728 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1729 ++ret;
1730
1731 return ret;
1732 }
1733
1734 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1735 .PPC.EMB.sbss0 a normal section, and not a bss section so
1736 that the linker doesn't crater when trying to make more than
1737 2 sections. */
1738
1739 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
1740 {
1741 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1742 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1743 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1744 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1745 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1746 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1747 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1748 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1749 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1750 { NULL, 0, 0, 0, 0 }
1751 };
1752 \f
1753 /* Very simple linked list structure for recording apuinfo values. */
1754 typedef struct apuinfo_list
1755 {
1756 struct apuinfo_list *next;
1757 unsigned long value;
1758 }
1759 apuinfo_list;
1760
1761 static apuinfo_list *head;
1762
1763
1764 static void
1765 apuinfo_list_init (void)
1766 {
1767 head = NULL;
1768 }
1769
1770 static void
1771 apuinfo_list_add (unsigned long value)
1772 {
1773 apuinfo_list *entry = head;
1774
1775 while (entry != NULL)
1776 {
1777 if (entry->value == value)
1778 return;
1779 entry = entry->next;
1780 }
1781
1782 entry = bfd_malloc (sizeof (* entry));
1783 if (entry == NULL)
1784 return;
1785
1786 entry->value = value;
1787 entry->next = head;
1788 head = entry;
1789 }
1790
1791 static unsigned
1792 apuinfo_list_length (void)
1793 {
1794 apuinfo_list *entry;
1795 unsigned long count;
1796
1797 for (entry = head, count = 0;
1798 entry;
1799 entry = entry->next)
1800 ++ count;
1801
1802 return count;
1803 }
1804
1805 static inline unsigned long
1806 apuinfo_list_element (unsigned long number)
1807 {
1808 apuinfo_list * entry;
1809
1810 for (entry = head;
1811 entry && number --;
1812 entry = entry->next)
1813 ;
1814
1815 return entry ? entry->value : 0;
1816 }
1817
1818 static void
1819 apuinfo_list_finish (void)
1820 {
1821 apuinfo_list *entry;
1822
1823 for (entry = head; entry;)
1824 {
1825 apuinfo_list *next = entry->next;
1826 free (entry);
1827 entry = next;
1828 }
1829
1830 head = NULL;
1831 }
1832
1833 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
1834 #define APUINFO_LABEL "APUinfo"
1835
1836 /* Scan the input BFDs and create a linked list of
1837 the APUinfo values that will need to be emitted. */
1838
1839 static void
1840 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
1841 {
1842 bfd *ibfd;
1843 asection *asec;
1844 char *buffer;
1845 unsigned num_input_sections;
1846 bfd_size_type output_section_size;
1847 unsigned i;
1848 unsigned num_entries;
1849 unsigned long offset;
1850 unsigned long length;
1851 const char *error_message = NULL;
1852
1853 if (link_info == NULL)
1854 return;
1855
1856 /* Scan the input bfds, looking for apuinfo sections. */
1857 num_input_sections = 0;
1858 output_section_size = 0;
1859
1860 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
1861 {
1862 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
1863 if (asec)
1864 {
1865 ++ num_input_sections;
1866 output_section_size += asec->size;
1867 }
1868 }
1869
1870 /* We need at least one input sections
1871 in order to make merging worthwhile. */
1872 if (num_input_sections < 1)
1873 return;
1874
1875 /* Just make sure that the output section exists as well. */
1876 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1877 if (asec == NULL)
1878 return;
1879
1880 /* Allocate a buffer for the contents of the input sections. */
1881 buffer = bfd_malloc (output_section_size);
1882 if (buffer == NULL)
1883 return;
1884
1885 offset = 0;
1886 apuinfo_list_init ();
1887
1888 /* Read in the input sections contents. */
1889 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
1890 {
1891 unsigned long datum;
1892 char *ptr;
1893
1894 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
1895 if (asec == NULL)
1896 continue;
1897
1898 length = asec->size;
1899 if (length < 24)
1900 {
1901 error_message = _("corrupt or empty %s section in %B");
1902 goto fail;
1903 }
1904
1905 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
1906 || (bfd_bread (buffer + offset, length, ibfd) != length))
1907 {
1908 error_message = _("unable to read in %s section from %B");
1909 goto fail;
1910 }
1911
1912 /* Process the contents of the section. */
1913 ptr = buffer + offset;
1914 error_message = _("corrupt %s section in %B");
1915
1916 /* Verify the contents of the header. Note - we have to
1917 extract the values this way in order to allow for a
1918 host whose endian-ness is different from the target. */
1919 datum = bfd_get_32 (ibfd, ptr);
1920 if (datum != sizeof APUINFO_LABEL)
1921 goto fail;
1922
1923 datum = bfd_get_32 (ibfd, ptr + 8);
1924 if (datum != 0x2)
1925 goto fail;
1926
1927 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
1928 goto fail;
1929
1930 /* Get the number of bytes used for apuinfo entries. */
1931 datum = bfd_get_32 (ibfd, ptr + 4);
1932 if (datum + 20 != length)
1933 goto fail;
1934
1935 /* Make sure that we do not run off the end of the section. */
1936 if (offset + length > output_section_size)
1937 goto fail;
1938
1939 /* Scan the apuinfo section, building a list of apuinfo numbers. */
1940 for (i = 0; i < datum; i += 4)
1941 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
1942
1943 /* Update the offset. */
1944 offset += length;
1945 }
1946
1947 error_message = NULL;
1948
1949 /* Compute the size of the output section. */
1950 num_entries = apuinfo_list_length ();
1951 output_section_size = 20 + num_entries * 4;
1952
1953 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1954
1955 if (! bfd_set_section_size (abfd, asec, output_section_size))
1956 ibfd = abfd,
1957 error_message = _("warning: unable to set size of %s section in %B");
1958
1959 fail:
1960 free (buffer);
1961
1962 if (error_message)
1963 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
1964 }
1965
1966 /* Prevent the output section from accumulating the input sections'
1967 contents. We have already stored this in our linked list structure. */
1968
1969 static bfd_boolean
1970 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
1971 asection *asec,
1972 bfd_byte *contents ATTRIBUTE_UNUSED)
1973 {
1974 return (apuinfo_list_length ()
1975 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
1976 }
1977
1978 /* Finally we can generate the output section. */
1979
1980 static void
1981 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
1982 {
1983 bfd_byte *buffer;
1984 asection *asec;
1985 unsigned i;
1986 unsigned num_entries;
1987 bfd_size_type length;
1988
1989 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1990 if (asec == NULL)
1991 return;
1992
1993 if (apuinfo_list_length () == 0)
1994 return;
1995
1996 length = asec->size;
1997 if (length < 20)
1998 return;
1999
2000 buffer = bfd_malloc (length);
2001 if (buffer == NULL)
2002 {
2003 (*_bfd_error_handler)
2004 (_("failed to allocate space for new APUinfo section."));
2005 return;
2006 }
2007
2008 /* Create the apuinfo header. */
2009 num_entries = apuinfo_list_length ();
2010 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2011 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2012 bfd_put_32 (abfd, 0x2, buffer + 8);
2013 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2014
2015 length = 20;
2016 for (i = 0; i < num_entries; i++)
2017 {
2018 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2019 length += 4;
2020 }
2021
2022 if (length != asec->size)
2023 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2024
2025 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2026 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2027
2028 free (buffer);
2029
2030 apuinfo_list_finish ();
2031 }
2032 \f
2033 /* The following functions are specific to the ELF linker, while
2034 functions above are used generally. They appear in this file more
2035 or less in the order in which they are called. eg.
2036 ppc_elf_check_relocs is called early in the link process,
2037 ppc_elf_finish_dynamic_sections is one of the last functions
2038 called. */
2039
2040 /* The PPC linker needs to keep track of the number of relocs that it
2041 decides to copy as dynamic relocs in check_relocs for each symbol.
2042 This is so that it can later discard them if they are found to be
2043 unnecessary. We store the information in a field extending the
2044 regular ELF linker hash table. */
2045
2046 struct ppc_elf_dyn_relocs
2047 {
2048 struct ppc_elf_dyn_relocs *next;
2049
2050 /* The input section of the reloc. */
2051 asection *sec;
2052
2053 /* Total number of relocs copied for the input section. */
2054 bfd_size_type count;
2055
2056 /* Number of pc-relative relocs copied for the input section. */
2057 bfd_size_type pc_count;
2058 };
2059
2060 /* Of those relocs that might be copied as dynamic relocs, this macro
2061 selects those that must be copied when linking a shared library,
2062 even when the symbol is local. */
2063
2064 #define MUST_BE_DYN_RELOC(RTYPE) \
2065 ((RTYPE) != R_PPC_REL24 \
2066 && (RTYPE) != R_PPC_REL14 \
2067 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2068 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2069 && (RTYPE) != R_PPC_REL32)
2070
2071 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2072 copying dynamic variables from a shared lib into an app's dynbss
2073 section, and instead use a dynamic relocation to point into the
2074 shared lib. */
2075 #define ELIMINATE_COPY_RELOCS 1
2076
2077 /* PPC ELF linker hash entry. */
2078
2079 struct ppc_elf_link_hash_entry
2080 {
2081 struct elf_link_hash_entry elf;
2082
2083 /* If this symbol is used in the linker created sections, the processor
2084 specific backend uses this field to map the field into the offset
2085 from the beginning of the section. */
2086 elf_linker_section_pointers_t *linker_section_pointer;
2087
2088 /* Track dynamic relocs copied for this symbol. */
2089 struct ppc_elf_dyn_relocs *dyn_relocs;
2090
2091 /* Contexts in which symbol is used in the GOT (or TOC).
2092 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2093 corresponding relocs are encountered during check_relocs.
2094 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2095 indicate the corresponding GOT entry type is not needed. */
2096 #define TLS_GD 1 /* GD reloc. */
2097 #define TLS_LD 2 /* LD reloc. */
2098 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2099 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2100 #define TLS_TLS 16 /* Any TLS reloc. */
2101 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2102 char tls_mask;
2103 };
2104
2105 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2106
2107 /* PPC ELF linker hash table. */
2108
2109 struct ppc_elf_link_hash_table
2110 {
2111 struct elf_link_hash_table elf;
2112
2113 /* Short-cuts to get to dynamic linker sections. */
2114 asection *got;
2115 asection *relgot;
2116 asection *plt;
2117 asection *relplt;
2118 asection *dynbss;
2119 asection *relbss;
2120 asection *dynsbss;
2121 asection *relsbss;
2122 elf_linker_section_t sdata[2];
2123 asection *sbss;
2124
2125 /* Shortcut to .__tls_get_addr. */
2126 struct elf_link_hash_entry *tls_get_addr;
2127
2128 /* TLS local dynamic got entry handling. */
2129 union {
2130 bfd_signed_vma refcount;
2131 bfd_vma offset;
2132 } tlsld_got;
2133
2134 /* Small local sym to section mapping cache. */
2135 struct sym_sec_cache sym_sec;
2136 };
2137
2138 /* Get the PPC ELF linker hash table from a link_info structure. */
2139
2140 #define ppc_elf_hash_table(p) \
2141 ((struct ppc_elf_link_hash_table *) (p)->hash)
2142
2143 /* Create an entry in a PPC ELF linker hash table. */
2144
2145 static struct bfd_hash_entry *
2146 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2147 struct bfd_hash_table *table,
2148 const char *string)
2149 {
2150 /* Allocate the structure if it has not already been allocated by a
2151 subclass. */
2152 if (entry == NULL)
2153 {
2154 entry = bfd_hash_allocate (table,
2155 sizeof (struct ppc_elf_link_hash_entry));
2156 if (entry == NULL)
2157 return entry;
2158 }
2159
2160 /* Call the allocation method of the superclass. */
2161 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2162 if (entry != NULL)
2163 {
2164 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2165 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2166 ppc_elf_hash_entry (entry)->tls_mask = 0;
2167 }
2168
2169 return entry;
2170 }
2171
2172 /* Create a PPC ELF linker hash table. */
2173
2174 static struct bfd_link_hash_table *
2175 ppc_elf_link_hash_table_create (bfd *abfd)
2176 {
2177 struct ppc_elf_link_hash_table *ret;
2178
2179 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2180 if (ret == NULL)
2181 return NULL;
2182
2183 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
2184 ppc_elf_link_hash_newfunc))
2185 {
2186 free (ret);
2187 return NULL;
2188 }
2189
2190 ret->sdata[0].name = ".sdata";
2191 ret->sdata[0].sym_name = "_SDA_BASE_";
2192 ret->sdata[0].bss_name = ".sbss";
2193
2194 ret->sdata[1].name = ".sdata2";
2195 ret->sdata[1].sym_name = "_SDA2_BASE_";
2196 ret->sdata[1].bss_name = ".sbss2";
2197
2198 return &ret->elf.root;
2199 }
2200
2201 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2202
2203 static bfd_boolean
2204 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2205 {
2206 struct ppc_elf_link_hash_table *htab;
2207 asection *s;
2208 flagword flags;
2209
2210 if (!_bfd_elf_create_got_section (abfd, info))
2211 return FALSE;
2212
2213 htab = ppc_elf_hash_table (info);
2214 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2215 if (s == NULL)
2216 abort ();
2217
2218 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2219 | SEC_LINKER_CREATED);
2220 if (!bfd_set_section_flags (abfd, s, flags))
2221 return FALSE;
2222
2223 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got",
2224 SEC_ALLOC | SEC_LOAD
2225 | SEC_HAS_CONTENTS
2226 | SEC_IN_MEMORY
2227 | SEC_LINKER_CREATED
2228 | SEC_READONLY);
2229 if (!htab->relgot
2230 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2231 return FALSE;
2232
2233 return TRUE;
2234 }
2235
2236 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2237 to output sections (just like _bfd_elf_create_dynamic_sections has
2238 to create .dynbss and .rela.bss). */
2239
2240 static bfd_boolean
2241 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2242 {
2243 struct ppc_elf_link_hash_table *htab;
2244 asection *s;
2245 flagword flags;
2246
2247 htab = ppc_elf_hash_table (info);
2248
2249 if (htab->got == NULL
2250 && !ppc_elf_create_got (abfd, info))
2251 return FALSE;
2252
2253 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2254 return FALSE;
2255
2256 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2257 | SEC_LINKER_CREATED);
2258
2259 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2260 htab->dynsbss = s = bfd_make_section_with_flags (abfd, ".dynsbss",
2261 SEC_ALLOC
2262 | SEC_LINKER_CREATED);
2263 if (s == NULL)
2264 return FALSE;
2265
2266 if (! info->shared)
2267 {
2268 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2269 htab->relsbss = s = bfd_make_section_with_flags (abfd,
2270 ".rela.sbss",
2271 flags | SEC_READONLY);
2272 if (s == NULL
2273 || ! bfd_set_section_alignment (abfd, s, 2))
2274 return FALSE;
2275 }
2276
2277 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2278 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2279 if (s == NULL)
2280 abort ();
2281
2282 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2283 return bfd_set_section_flags (abfd, s, flags);
2284 }
2285
2286 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2287
2288 static void
2289 ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed,
2290 struct elf_link_hash_entry *dir,
2291 struct elf_link_hash_entry *ind)
2292 {
2293 struct ppc_elf_link_hash_entry *edir, *eind;
2294
2295 edir = (struct ppc_elf_link_hash_entry *) dir;
2296 eind = (struct ppc_elf_link_hash_entry *) ind;
2297
2298 if (eind->dyn_relocs != NULL)
2299 {
2300 if (edir->dyn_relocs != NULL)
2301 {
2302 struct ppc_elf_dyn_relocs **pp;
2303 struct ppc_elf_dyn_relocs *p;
2304
2305 if (ind->root.type == bfd_link_hash_indirect)
2306 abort ();
2307
2308 /* Add reloc counts against the weak sym to the strong sym
2309 list. Merge any entries against the same section. */
2310 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2311 {
2312 struct ppc_elf_dyn_relocs *q;
2313
2314 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2315 if (q->sec == p->sec)
2316 {
2317 q->pc_count += p->pc_count;
2318 q->count += p->count;
2319 *pp = p->next;
2320 break;
2321 }
2322 if (q == NULL)
2323 pp = &p->next;
2324 }
2325 *pp = edir->dyn_relocs;
2326 }
2327
2328 edir->dyn_relocs = eind->dyn_relocs;
2329 eind->dyn_relocs = NULL;
2330 }
2331
2332 edir->tls_mask |= eind->tls_mask;
2333
2334 if (ELIMINATE_COPY_RELOCS
2335 && ind->root.type != bfd_link_hash_indirect
2336 && dir->dynamic_adjusted)
2337 {
2338 /* If called to transfer flags for a weakdef during processing
2339 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2340 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2341 dir->ref_dynamic |= ind->ref_dynamic;
2342 dir->ref_regular |= ind->ref_regular;
2343 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
2344 dir->needs_plt |= ind->needs_plt;
2345 }
2346 else
2347 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
2348 }
2349
2350 /* Return 1 if target is one of ours. */
2351
2352 static bfd_boolean
2353 is_ppc_elf_target (const struct bfd_target *targ)
2354 {
2355 extern const bfd_target bfd_elf32_powerpc_vec;
2356 extern const bfd_target bfd_elf32_powerpcle_vec;
2357
2358 return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec;
2359 }
2360
2361 /* Hook called by the linker routine which adds symbols from an object
2362 file. We use it to put .comm items in .sbss, and not .bss. */
2363
2364 static bfd_boolean
2365 ppc_elf_add_symbol_hook (bfd *abfd,
2366 struct bfd_link_info *info,
2367 Elf_Internal_Sym *sym,
2368 const char **namep ATTRIBUTE_UNUSED,
2369 flagword *flagsp ATTRIBUTE_UNUSED,
2370 asection **secp,
2371 bfd_vma *valp)
2372 {
2373 if (sym->st_shndx == SHN_COMMON
2374 && !info->relocatable
2375 && sym->st_size <= elf_gp_size (abfd)
2376 && is_ppc_elf_target (info->hash->creator))
2377 {
2378 /* Common symbols less than or equal to -G nn bytes are automatically
2379 put into .sbss. */
2380 struct ppc_elf_link_hash_table *htab;
2381
2382 htab = ppc_elf_hash_table (info);
2383 if (htab->sbss == NULL)
2384 {
2385 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2386
2387 if (!htab->elf.dynobj)
2388 htab->elf.dynobj = abfd;
2389
2390 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2391 ".sbss",
2392 flags);
2393 if (htab->sbss == NULL)
2394 return FALSE;
2395 }
2396
2397 *secp = htab->sbss;
2398 *valp = sym->st_size;
2399 }
2400
2401 return TRUE;
2402 }
2403 \f
2404 /* Create a special linker section. */
2405
2406 static bfd_boolean
2407 ppc_elf_create_linker_section (bfd *abfd,
2408 struct bfd_link_info *info,
2409 flagword flags,
2410 elf_linker_section_t *lsect)
2411 {
2412 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2413 asection *s;
2414
2415 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2416 | SEC_LINKER_CREATED);
2417
2418 /* Record the first bfd that needs the special sections. */
2419 if (!htab->elf.dynobj)
2420 htab->elf.dynobj = abfd;
2421
2422 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2423 lsect->name,
2424 flags);
2425 if (s == NULL
2426 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2427 return FALSE;
2428 lsect->section = s;
2429
2430 return TRUE;
2431 }
2432
2433 /* Find a linker generated pointer with a given addend and type. */
2434
2435 static elf_linker_section_pointers_t *
2436 elf_find_pointer_linker_section
2437 (elf_linker_section_pointers_t *linker_pointers,
2438 bfd_vma addend,
2439 elf_linker_section_t *lsect)
2440 {
2441 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2442 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2443 return linker_pointers;
2444
2445 return NULL;
2446 }
2447
2448 /* Allocate a pointer to live in a linker created section. */
2449
2450 static bfd_boolean
2451 elf_create_pointer_linker_section (bfd *abfd,
2452 elf_linker_section_t *lsect,
2453 struct elf_link_hash_entry *h,
2454 const Elf_Internal_Rela *rel)
2455 {
2456 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2457 elf_linker_section_pointers_t *linker_section_ptr;
2458 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2459 bfd_size_type amt;
2460
2461 BFD_ASSERT (lsect != NULL);
2462
2463 /* Is this a global symbol? */
2464 if (h != NULL)
2465 {
2466 struct ppc_elf_link_hash_entry *eh;
2467
2468 /* Has this symbol already been allocated? If so, our work is done. */
2469 eh = (struct ppc_elf_link_hash_entry *) h;
2470 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2471 rel->r_addend,
2472 lsect))
2473 return TRUE;
2474
2475 ptr_linker_section_ptr = &eh->linker_section_pointer;
2476 }
2477 else
2478 {
2479 /* Allocation of a pointer to a local symbol. */
2480 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2481
2482 /* Allocate a table to hold the local symbols if first time. */
2483 if (!ptr)
2484 {
2485 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2486
2487 amt = num_symbols;
2488 amt *= sizeof (elf_linker_section_pointers_t *);
2489 ptr = bfd_zalloc (abfd, amt);
2490
2491 if (!ptr)
2492 return FALSE;
2493
2494 elf_local_ptr_offsets (abfd) = ptr;
2495 }
2496
2497 /* Has this symbol already been allocated? If so, our work is done. */
2498 if (elf_find_pointer_linker_section (ptr[r_symndx],
2499 rel->r_addend,
2500 lsect))
2501 return TRUE;
2502
2503 ptr_linker_section_ptr = &ptr[r_symndx];
2504 }
2505
2506 /* Allocate space for a pointer in the linker section, and allocate
2507 a new pointer record from internal memory. */
2508 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2509 amt = sizeof (elf_linker_section_pointers_t);
2510 linker_section_ptr = bfd_alloc (abfd, amt);
2511
2512 if (!linker_section_ptr)
2513 return FALSE;
2514
2515 linker_section_ptr->next = *ptr_linker_section_ptr;
2516 linker_section_ptr->addend = rel->r_addend;
2517 linker_section_ptr->lsect = lsect;
2518 *ptr_linker_section_ptr = linker_section_ptr;
2519
2520 linker_section_ptr->offset = lsect->section->size;
2521 lsect->section->size += 4;
2522
2523 #ifdef DEBUG
2524 fprintf (stderr,
2525 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2526 lsect->name, (long) linker_section_ptr->offset,
2527 (long) lsect->section->size);
2528 #endif
2529
2530 return TRUE;
2531 }
2532
2533 static bfd_boolean
2534 update_local_sym_info (bfd *abfd,
2535 Elf_Internal_Shdr *symtab_hdr,
2536 unsigned long r_symndx,
2537 int tls_type)
2538 {
2539 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2540 char *local_got_tls_masks;
2541
2542 if (local_got_refcounts == NULL)
2543 {
2544 bfd_size_type size = symtab_hdr->sh_info;
2545
2546 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2547 local_got_refcounts = bfd_zalloc (abfd, size);
2548 if (local_got_refcounts == NULL)
2549 return FALSE;
2550 elf_local_got_refcounts (abfd) = local_got_refcounts;
2551 }
2552
2553 local_got_refcounts[r_symndx] += 1;
2554 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2555 local_got_tls_masks[r_symndx] |= tls_type;
2556 return TRUE;
2557 }
2558
2559 static void
2560 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2561 {
2562 (*_bfd_error_handler)
2563 (_("%B: relocation %s cannot be used when making a shared object"),
2564 abfd,
2565 ppc_elf_howto_table[r_type]->name);
2566 bfd_set_error (bfd_error_bad_value);
2567 }
2568
2569 /* Look through the relocs for a section during the first phase, and
2570 allocate space in the global offset table or procedure linkage
2571 table. */
2572
2573 static bfd_boolean
2574 ppc_elf_check_relocs (bfd *abfd,
2575 struct bfd_link_info *info,
2576 asection *sec,
2577 const Elf_Internal_Rela *relocs)
2578 {
2579 struct ppc_elf_link_hash_table *htab;
2580 Elf_Internal_Shdr *symtab_hdr;
2581 struct elf_link_hash_entry **sym_hashes;
2582 const Elf_Internal_Rela *rel;
2583 const Elf_Internal_Rela *rel_end;
2584 asection *sreloc;
2585
2586 if (info->relocatable)
2587 return TRUE;
2588
2589 /* Don't do anything special with non-loaded, non-alloced sections.
2590 In particular, any relocs in such sections should not affect GOT
2591 and PLT reference counting (ie. we don't allow them to create GOT
2592 or PLT entries), there's no possibility or desire to optimize TLS
2593 relocs, and there's not much point in propagating relocs to shared
2594 libs that the dynamic linker won't relocate. */
2595 if ((sec->flags & SEC_ALLOC) == 0)
2596 return TRUE;
2597
2598 #ifdef DEBUG
2599 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2600 sec, abfd);
2601 #endif
2602
2603 /* Initialize howto table if not already done. */
2604 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2605 ppc_elf_howto_init ();
2606
2607 htab = ppc_elf_hash_table (info);
2608 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2609 sym_hashes = elf_sym_hashes (abfd);
2610 sreloc = NULL;
2611
2612 rel_end = relocs + sec->reloc_count;
2613 for (rel = relocs; rel < rel_end; rel++)
2614 {
2615 unsigned long r_symndx;
2616 enum elf_ppc_reloc_type r_type;
2617 struct elf_link_hash_entry *h;
2618 int tls_type = 0;
2619
2620 r_symndx = ELF32_R_SYM (rel->r_info);
2621 if (r_symndx < symtab_hdr->sh_info)
2622 h = NULL;
2623 else
2624 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2625
2626 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
2627 This shows up in particular in an R_PPC_ADDR32 in the eabi
2628 startup code. */
2629 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2630 {
2631 if (htab->got == NULL)
2632 {
2633 if (htab->elf.dynobj == NULL)
2634 htab->elf.dynobj = abfd;
2635 if (!ppc_elf_create_got (htab->elf.dynobj, info))
2636 return FALSE;
2637 }
2638 }
2639
2640 r_type = ELF32_R_TYPE (rel->r_info);
2641 switch (r_type)
2642 {
2643 case R_PPC_GOT_TLSLD16:
2644 case R_PPC_GOT_TLSLD16_LO:
2645 case R_PPC_GOT_TLSLD16_HI:
2646 case R_PPC_GOT_TLSLD16_HA:
2647 htab->tlsld_got.refcount += 1;
2648 tls_type = TLS_TLS | TLS_LD;
2649 goto dogottls;
2650
2651 case R_PPC_GOT_TLSGD16:
2652 case R_PPC_GOT_TLSGD16_LO:
2653 case R_PPC_GOT_TLSGD16_HI:
2654 case R_PPC_GOT_TLSGD16_HA:
2655 tls_type = TLS_TLS | TLS_GD;
2656 goto dogottls;
2657
2658 case R_PPC_GOT_TPREL16:
2659 case R_PPC_GOT_TPREL16_LO:
2660 case R_PPC_GOT_TPREL16_HI:
2661 case R_PPC_GOT_TPREL16_HA:
2662 if (info->shared)
2663 info->flags |= DF_STATIC_TLS;
2664 tls_type = TLS_TLS | TLS_TPREL;
2665 goto dogottls;
2666
2667 case R_PPC_GOT_DTPREL16:
2668 case R_PPC_GOT_DTPREL16_LO:
2669 case R_PPC_GOT_DTPREL16_HI:
2670 case R_PPC_GOT_DTPREL16_HA:
2671 tls_type = TLS_TLS | TLS_DTPREL;
2672 dogottls:
2673 sec->has_tls_reloc = 1;
2674 /* Fall thru */
2675
2676 /* GOT16 relocations */
2677 case R_PPC_GOT16:
2678 case R_PPC_GOT16_LO:
2679 case R_PPC_GOT16_HI:
2680 case R_PPC_GOT16_HA:
2681 /* This symbol requires a global offset table entry. */
2682 if (htab->got == NULL)
2683 {
2684 if (htab->elf.dynobj == NULL)
2685 htab->elf.dynobj = abfd;
2686 if (!ppc_elf_create_got (htab->elf.dynobj, info))
2687 return FALSE;
2688 }
2689 if (h != NULL)
2690 {
2691 h->got.refcount += 1;
2692 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
2693 }
2694 else
2695 /* This is a global offset table entry for a local symbol. */
2696 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
2697 return FALSE;
2698 break;
2699
2700 /* Indirect .sdata relocation. */
2701 case R_PPC_EMB_SDAI16:
2702 if (info->shared)
2703 {
2704 bad_shared_reloc (abfd, r_type);
2705 return FALSE;
2706 }
2707 if (htab->sdata[0].section == NULL
2708 && !ppc_elf_create_linker_section (abfd, info, 0,
2709 &htab->sdata[0]))
2710 return FALSE;
2711 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
2712 h, rel))
2713 return FALSE;
2714 break;
2715
2716 /* Indirect .sdata2 relocation. */
2717 case R_PPC_EMB_SDA2I16:
2718 if (info->shared)
2719 {
2720 bad_shared_reloc (abfd, r_type);
2721 return FALSE;
2722 }
2723 if (htab->sdata[1].section == NULL
2724 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
2725 &htab->sdata[1]))
2726 return FALSE;
2727 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
2728 h, rel))
2729 return FALSE;
2730 break;
2731
2732 case R_PPC_SDAREL16:
2733 case R_PPC_EMB_SDA2REL:
2734 case R_PPC_EMB_SDA21:
2735 case R_PPC_EMB_RELSDA:
2736 case R_PPC_EMB_NADDR32:
2737 case R_PPC_EMB_NADDR16:
2738 case R_PPC_EMB_NADDR16_LO:
2739 case R_PPC_EMB_NADDR16_HI:
2740 case R_PPC_EMB_NADDR16_HA:
2741 if (info->shared)
2742 {
2743 bad_shared_reloc (abfd, r_type);
2744 return FALSE;
2745 }
2746 break;
2747
2748 case R_PPC_PLT32:
2749 case R_PPC_PLTREL24:
2750 case R_PPC_PLTREL32:
2751 case R_PPC_PLT16_LO:
2752 case R_PPC_PLT16_HI:
2753 case R_PPC_PLT16_HA:
2754 #ifdef DEBUG
2755 fprintf (stderr, "Reloc requires a PLT entry\n");
2756 #endif
2757 /* This symbol requires a procedure linkage table entry. We
2758 actually build the entry in finish_dynamic_symbol,
2759 because this might be a case of linking PIC code without
2760 linking in any dynamic objects, in which case we don't
2761 need to generate a procedure linkage table after all. */
2762
2763 if (h == NULL)
2764 {
2765 /* It does not make sense to have a procedure linkage
2766 table entry for a local symbol. */
2767 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
2768 "local symbol"),
2769 abfd,
2770 sec,
2771 (long) rel->r_offset,
2772 ppc_elf_howto_table[r_type]->name);
2773 bfd_set_error (bfd_error_bad_value);
2774 return FALSE;
2775 }
2776
2777 h->needs_plt = 1;
2778 h->plt.refcount++;
2779 break;
2780
2781 /* The following relocations don't need to propagate the
2782 relocation if linking a shared object since they are
2783 section relative. */
2784 case R_PPC_SECTOFF:
2785 case R_PPC_SECTOFF_LO:
2786 case R_PPC_SECTOFF_HI:
2787 case R_PPC_SECTOFF_HA:
2788 case R_PPC_DTPREL16:
2789 case R_PPC_DTPREL16_LO:
2790 case R_PPC_DTPREL16_HI:
2791 case R_PPC_DTPREL16_HA:
2792 case R_PPC_TOC16:
2793 break;
2794
2795 /* This are just markers. */
2796 case R_PPC_TLS:
2797 case R_PPC_EMB_MRKREF:
2798 case R_PPC_NONE:
2799 case R_PPC_max:
2800 break;
2801
2802 /* These should only appear in dynamic objects. */
2803 case R_PPC_COPY:
2804 case R_PPC_GLOB_DAT:
2805 case R_PPC_JMP_SLOT:
2806 case R_PPC_RELATIVE:
2807 break;
2808
2809 /* These aren't handled yet. We'll report an error later. */
2810 case R_PPC_ADDR30:
2811 case R_PPC_EMB_RELSEC16:
2812 case R_PPC_EMB_RELST_LO:
2813 case R_PPC_EMB_RELST_HI:
2814 case R_PPC_EMB_RELST_HA:
2815 case R_PPC_EMB_BIT_FLD:
2816 break;
2817
2818 /* This refers only to functions defined in the shared library. */
2819 case R_PPC_LOCAL24PC:
2820 break;
2821
2822 /* This relocation describes the C++ object vtable hierarchy.
2823 Reconstruct it for later use during GC. */
2824 case R_PPC_GNU_VTINHERIT:
2825 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2826 return FALSE;
2827 break;
2828
2829 /* This relocation describes which C++ vtable entries are actually
2830 used. Record for later use during GC. */
2831 case R_PPC_GNU_VTENTRY:
2832 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2833 return FALSE;
2834 break;
2835
2836 /* We shouldn't really be seeing these. */
2837 case R_PPC_TPREL32:
2838 if (info->shared)
2839 info->flags |= DF_STATIC_TLS;
2840 goto dodyn;
2841
2842 /* Nor these. */
2843 case R_PPC_DTPMOD32:
2844 case R_PPC_DTPREL32:
2845 goto dodyn;
2846
2847 case R_PPC_TPREL16:
2848 case R_PPC_TPREL16_LO:
2849 case R_PPC_TPREL16_HI:
2850 case R_PPC_TPREL16_HA:
2851 if (info->shared)
2852 info->flags |= DF_STATIC_TLS;
2853 goto dodyn;
2854
2855 /* When creating a shared object, we must copy these
2856 relocs into the output file. We create a reloc
2857 section in dynobj and make room for the reloc. */
2858 case R_PPC_REL24:
2859 case R_PPC_REL14:
2860 case R_PPC_REL14_BRTAKEN:
2861 case R_PPC_REL14_BRNTAKEN:
2862 case R_PPC_REL32:
2863 if (h == NULL
2864 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2865 break;
2866 /* fall through */
2867
2868 case R_PPC_ADDR32:
2869 case R_PPC_ADDR24:
2870 case R_PPC_ADDR16:
2871 case R_PPC_ADDR16_LO:
2872 case R_PPC_ADDR16_HI:
2873 case R_PPC_ADDR16_HA:
2874 case R_PPC_ADDR14:
2875 case R_PPC_ADDR14_BRTAKEN:
2876 case R_PPC_ADDR14_BRNTAKEN:
2877 case R_PPC_UADDR32:
2878 case R_PPC_UADDR16:
2879 if (h != NULL && !info->shared)
2880 {
2881 /* We may need a plt entry if the symbol turns out to be
2882 a function defined in a dynamic object. */
2883 h->plt.refcount++;
2884
2885 /* We may need a copy reloc too. */
2886 h->non_got_ref = 1;
2887 }
2888
2889 dodyn:
2890 /* If we are creating a shared library, and this is a reloc
2891 against a global symbol, or a non PC relative reloc
2892 against a local symbol, then we need to copy the reloc
2893 into the shared library. However, if we are linking with
2894 -Bsymbolic, we do not need to copy a reloc against a
2895 global symbol which is defined in an object we are
2896 including in the link (i.e., DEF_REGULAR is set). At
2897 this point we have not seen all the input files, so it is
2898 possible that DEF_REGULAR is not set now but will be set
2899 later (it is never cleared). In case of a weak definition,
2900 DEF_REGULAR may be cleared later by a strong definition in
2901 a shared library. We account for that possibility below by
2902 storing information in the dyn_relocs field of the hash
2903 table entry. A similar situation occurs when creating
2904 shared libraries and symbol visibility changes render the
2905 symbol local.
2906
2907 If on the other hand, we are creating an executable, we
2908 may need to keep relocations for symbols satisfied by a
2909 dynamic library if we manage to avoid copy relocs for the
2910 symbol. */
2911 if ((info->shared
2912 && (MUST_BE_DYN_RELOC (r_type)
2913 || (h != NULL
2914 && (! info->symbolic
2915 || h->root.type == bfd_link_hash_defweak
2916 || !h->def_regular))))
2917 || (ELIMINATE_COPY_RELOCS
2918 && !info->shared
2919 && h != NULL
2920 && (h->root.type == bfd_link_hash_defweak
2921 || !h->def_regular)))
2922 {
2923 struct ppc_elf_dyn_relocs *p;
2924 struct ppc_elf_dyn_relocs **head;
2925
2926 #ifdef DEBUG
2927 fprintf (stderr,
2928 "ppc_elf_check_relocs needs to "
2929 "create relocation for %s\n",
2930 (h && h->root.root.string
2931 ? h->root.root.string : "<unknown>"));
2932 #endif
2933 if (sreloc == NULL)
2934 {
2935 const char *name;
2936
2937 name = (bfd_elf_string_from_elf_section
2938 (abfd,
2939 elf_elfheader (abfd)->e_shstrndx,
2940 elf_section_data (sec)->rel_hdr.sh_name));
2941 if (name == NULL)
2942 return FALSE;
2943
2944 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2945 && strcmp (bfd_get_section_name (abfd, sec),
2946 name + 5) == 0);
2947
2948 if (htab->elf.dynobj == NULL)
2949 htab->elf.dynobj = abfd;
2950 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
2951 if (sreloc == NULL)
2952 {
2953 flagword flags;
2954
2955 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2956 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2957 | SEC_ALLOC | SEC_LOAD);
2958 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
2959 name,
2960 flags);
2961 if (sreloc == NULL
2962 || ! bfd_set_section_alignment (htab->elf.dynobj,
2963 sreloc, 2))
2964 return FALSE;
2965 }
2966 elf_section_data (sec)->sreloc = sreloc;
2967 }
2968
2969 /* If this is a global symbol, we count the number of
2970 relocations we need for this symbol. */
2971 if (h != NULL)
2972 {
2973 head = &ppc_elf_hash_entry (h)->dyn_relocs;
2974 }
2975 else
2976 {
2977 /* Track dynamic relocs needed for local syms too.
2978 We really need local syms available to do this
2979 easily. Oh well. */
2980
2981 asection *s;
2982 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
2983 sec, r_symndx);
2984 if (s == NULL)
2985 return FALSE;
2986
2987 head = ((struct ppc_elf_dyn_relocs **)
2988 &elf_section_data (s)->local_dynrel);
2989 }
2990
2991 p = *head;
2992 if (p == NULL || p->sec != sec)
2993 {
2994 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
2995 if (p == NULL)
2996 return FALSE;
2997 p->next = *head;
2998 *head = p;
2999 p->sec = sec;
3000 p->count = 0;
3001 p->pc_count = 0;
3002 }
3003
3004 p->count += 1;
3005 if (!MUST_BE_DYN_RELOC (r_type))
3006 p->pc_count += 1;
3007 }
3008
3009 break;
3010 }
3011 }
3012
3013 return TRUE;
3014 }
3015 \f
3016 /* Merge backend specific data from an object file to the output
3017 object file when linking. */
3018
3019 static bfd_boolean
3020 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3021 {
3022 flagword old_flags;
3023 flagword new_flags;
3024 bfd_boolean error;
3025
3026 if (!is_ppc_elf_target (ibfd->xvec)
3027 || !is_ppc_elf_target (obfd->xvec))
3028 return TRUE;
3029
3030 /* Check if we have the same endianess. */
3031 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3032 return FALSE;
3033
3034 new_flags = elf_elfheader (ibfd)->e_flags;
3035 old_flags = elf_elfheader (obfd)->e_flags;
3036 if (!elf_flags_init (obfd))
3037 {
3038 /* First call, no flags set. */
3039 elf_flags_init (obfd) = TRUE;
3040 elf_elfheader (obfd)->e_flags = new_flags;
3041 }
3042
3043 /* Compatible flags are ok. */
3044 else if (new_flags == old_flags)
3045 ;
3046
3047 /* Incompatible flags. */
3048 else
3049 {
3050 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3051 to be linked with either. */
3052 error = FALSE;
3053 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3054 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3055 {
3056 error = TRUE;
3057 (*_bfd_error_handler)
3058 (_("%B: compiled with -mrelocatable and linked with "
3059 "modules compiled normally"), ibfd);
3060 }
3061 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3062 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3063 {
3064 error = TRUE;
3065 (*_bfd_error_handler)
3066 (_("%B: compiled normally and linked with "
3067 "modules compiled with -mrelocatable"), ibfd);
3068 }
3069
3070 /* The output is -mrelocatable-lib iff both the input files are. */
3071 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3072 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3073
3074 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3075 but each input file is either -mrelocatable or -mrelocatable-lib. */
3076 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3077 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3078 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3079 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3080
3081 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3082 any module uses it. */
3083 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3084
3085 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3086 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3087
3088 /* Warn about any other mismatches. */
3089 if (new_flags != old_flags)
3090 {
3091 error = TRUE;
3092 (*_bfd_error_handler)
3093 (_("%B: uses different e_flags (0x%lx) fields "
3094 "than previous modules (0x%lx)"),
3095 ibfd, (long) new_flags, (long) old_flags);
3096 }
3097
3098 if (error)
3099 {
3100 bfd_set_error (bfd_error_bad_value);
3101 return FALSE;
3102 }
3103 }
3104
3105 return TRUE;
3106 }
3107 \f
3108 /* Return the section that should be marked against GC for a given
3109 relocation. */
3110
3111 static asection *
3112 ppc_elf_gc_mark_hook (asection *sec,
3113 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3114 Elf_Internal_Rela *rel,
3115 struct elf_link_hash_entry *h,
3116 Elf_Internal_Sym *sym)
3117 {
3118 if (h != NULL)
3119 {
3120 switch (ELF32_R_TYPE (rel->r_info))
3121 {
3122 case R_PPC_GNU_VTINHERIT:
3123 case R_PPC_GNU_VTENTRY:
3124 break;
3125
3126 default:
3127 switch (h->root.type)
3128 {
3129 case bfd_link_hash_defined:
3130 case bfd_link_hash_defweak:
3131 return h->root.u.def.section;
3132
3133 case bfd_link_hash_common:
3134 return h->root.u.c.p->section;
3135
3136 default:
3137 break;
3138 }
3139 }
3140 }
3141 else
3142 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3143
3144 return NULL;
3145 }
3146
3147 /* Update the got, plt and dynamic reloc reference counts for the
3148 section being removed. */
3149
3150 static bfd_boolean
3151 ppc_elf_gc_sweep_hook (bfd *abfd,
3152 struct bfd_link_info *info,
3153 asection *sec,
3154 const Elf_Internal_Rela *relocs)
3155 {
3156 struct ppc_elf_link_hash_table *htab;
3157 Elf_Internal_Shdr *symtab_hdr;
3158 struct elf_link_hash_entry **sym_hashes;
3159 bfd_signed_vma *local_got_refcounts;
3160 const Elf_Internal_Rela *rel, *relend;
3161
3162 if ((sec->flags & SEC_ALLOC) == 0)
3163 return TRUE;
3164
3165 elf_section_data (sec)->local_dynrel = NULL;
3166
3167 htab = ppc_elf_hash_table (info);
3168 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3169 sym_hashes = elf_sym_hashes (abfd);
3170 local_got_refcounts = elf_local_got_refcounts (abfd);
3171
3172 relend = relocs + sec->reloc_count;
3173 for (rel = relocs; rel < relend; rel++)
3174 {
3175 unsigned long r_symndx;
3176 enum elf_ppc_reloc_type r_type;
3177 struct elf_link_hash_entry *h = NULL;
3178
3179 r_symndx = ELF32_R_SYM (rel->r_info);
3180 if (r_symndx >= symtab_hdr->sh_info)
3181 {
3182 struct ppc_elf_dyn_relocs **pp, *p;
3183 struct ppc_elf_link_hash_entry *eh;
3184
3185 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3186 while (h->root.type == bfd_link_hash_indirect
3187 || h->root.type == bfd_link_hash_warning)
3188 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3189 eh = (struct ppc_elf_link_hash_entry *) h;
3190
3191 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3192 if (p->sec == sec)
3193 {
3194 /* Everything must go for SEC. */
3195 *pp = p->next;
3196 break;
3197 }
3198 }
3199
3200 r_type = ELF32_R_TYPE (rel->r_info);
3201 switch (r_type)
3202 {
3203 case R_PPC_GOT_TLSLD16:
3204 case R_PPC_GOT_TLSLD16_LO:
3205 case R_PPC_GOT_TLSLD16_HI:
3206 case R_PPC_GOT_TLSLD16_HA:
3207 htab->tlsld_got.refcount -= 1;
3208 /* Fall thru */
3209
3210 case R_PPC_GOT_TLSGD16:
3211 case R_PPC_GOT_TLSGD16_LO:
3212 case R_PPC_GOT_TLSGD16_HI:
3213 case R_PPC_GOT_TLSGD16_HA:
3214 case R_PPC_GOT_TPREL16:
3215 case R_PPC_GOT_TPREL16_LO:
3216 case R_PPC_GOT_TPREL16_HI:
3217 case R_PPC_GOT_TPREL16_HA:
3218 case R_PPC_GOT_DTPREL16:
3219 case R_PPC_GOT_DTPREL16_LO:
3220 case R_PPC_GOT_DTPREL16_HI:
3221 case R_PPC_GOT_DTPREL16_HA:
3222 case R_PPC_GOT16:
3223 case R_PPC_GOT16_LO:
3224 case R_PPC_GOT16_HI:
3225 case R_PPC_GOT16_HA:
3226 if (h != NULL)
3227 {
3228 if (h->got.refcount > 0)
3229 h->got.refcount--;
3230 }
3231 else if (local_got_refcounts != NULL)
3232 {
3233 if (local_got_refcounts[r_symndx] > 0)
3234 local_got_refcounts[r_symndx]--;
3235 }
3236 break;
3237
3238 case R_PPC_REL24:
3239 case R_PPC_REL14:
3240 case R_PPC_REL14_BRTAKEN:
3241 case R_PPC_REL14_BRNTAKEN:
3242 case R_PPC_REL32:
3243 if (h == NULL
3244 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3245 break;
3246 /* Fall thru */
3247
3248 case R_PPC_ADDR32:
3249 case R_PPC_ADDR24:
3250 case R_PPC_ADDR16:
3251 case R_PPC_ADDR16_LO:
3252 case R_PPC_ADDR16_HI:
3253 case R_PPC_ADDR16_HA:
3254 case R_PPC_ADDR14:
3255 case R_PPC_ADDR14_BRTAKEN:
3256 case R_PPC_ADDR14_BRNTAKEN:
3257 case R_PPC_UADDR32:
3258 case R_PPC_UADDR16:
3259 case R_PPC_PLT32:
3260 case R_PPC_PLTREL24:
3261 case R_PPC_PLT16_LO:
3262 case R_PPC_PLT16_HI:
3263 case R_PPC_PLT16_HA:
3264 if (h != NULL)
3265 {
3266 if (h->plt.refcount > 0)
3267 h->plt.refcount--;
3268 }
3269 break;
3270
3271 default:
3272 break;
3273 }
3274 }
3275 return TRUE;
3276 }
3277 \f
3278 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3279
3280 asection *
3281 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3282 {
3283 struct ppc_elf_link_hash_table *htab;
3284
3285 htab = ppc_elf_hash_table (info);
3286 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3287 FALSE, FALSE, TRUE);
3288
3289 return _bfd_elf_tls_setup (obfd, info);
3290 }
3291
3292 /* Run through all the TLS relocs looking for optimization
3293 opportunities. */
3294
3295 bfd_boolean
3296 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3297 struct bfd_link_info *info)
3298 {
3299 bfd *ibfd;
3300 asection *sec;
3301 struct ppc_elf_link_hash_table *htab;
3302
3303 if (info->relocatable || info->shared)
3304 return TRUE;
3305
3306 htab = ppc_elf_hash_table (info);
3307 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3308 {
3309 Elf_Internal_Sym *locsyms = NULL;
3310 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3311
3312 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3313 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3314 {
3315 Elf_Internal_Rela *relstart, *rel, *relend;
3316 int expecting_tls_get_addr;
3317
3318 /* Read the relocations. */
3319 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3320 info->keep_memory);
3321 if (relstart == NULL)
3322 return FALSE;
3323
3324 expecting_tls_get_addr = 0;
3325 relend = relstart + sec->reloc_count;
3326 for (rel = relstart; rel < relend; rel++)
3327 {
3328 enum elf_ppc_reloc_type r_type;
3329 unsigned long r_symndx;
3330 struct elf_link_hash_entry *h = NULL;
3331 char *tls_mask;
3332 char tls_set, tls_clear;
3333 bfd_boolean is_local;
3334
3335 r_symndx = ELF32_R_SYM (rel->r_info);
3336 if (r_symndx >= symtab_hdr->sh_info)
3337 {
3338 struct elf_link_hash_entry **sym_hashes;
3339
3340 sym_hashes = elf_sym_hashes (ibfd);
3341 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3342 while (h->root.type == bfd_link_hash_indirect
3343 || h->root.type == bfd_link_hash_warning)
3344 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3345 }
3346
3347 is_local = FALSE;
3348 if (h == NULL
3349 || !h->def_dynamic)
3350 is_local = TRUE;
3351
3352 r_type = ELF32_R_TYPE (rel->r_info);
3353 switch (r_type)
3354 {
3355 case R_PPC_GOT_TLSLD16:
3356 case R_PPC_GOT_TLSLD16_LO:
3357 case R_PPC_GOT_TLSLD16_HI:
3358 case R_PPC_GOT_TLSLD16_HA:
3359 /* These relocs should never be against a symbol
3360 defined in a shared lib. Leave them alone if
3361 that turns out to be the case. */
3362 expecting_tls_get_addr = 0;
3363 htab->tlsld_got.refcount -= 1;
3364 if (!is_local)
3365 continue;
3366
3367 /* LD -> LE */
3368 tls_set = 0;
3369 tls_clear = TLS_LD;
3370 expecting_tls_get_addr = 1;
3371 break;
3372
3373 case R_PPC_GOT_TLSGD16:
3374 case R_PPC_GOT_TLSGD16_LO:
3375 case R_PPC_GOT_TLSGD16_HI:
3376 case R_PPC_GOT_TLSGD16_HA:
3377 if (is_local)
3378 /* GD -> LE */
3379 tls_set = 0;
3380 else
3381 /* GD -> IE */
3382 tls_set = TLS_TLS | TLS_TPRELGD;
3383 tls_clear = TLS_GD;
3384 expecting_tls_get_addr = 1;
3385 break;
3386
3387 case R_PPC_GOT_TPREL16:
3388 case R_PPC_GOT_TPREL16_LO:
3389 case R_PPC_GOT_TPREL16_HI:
3390 case R_PPC_GOT_TPREL16_HA:
3391 expecting_tls_get_addr = 0;
3392 if (is_local)
3393 {
3394 /* IE -> LE */
3395 tls_set = 0;
3396 tls_clear = TLS_TPREL;
3397 break;
3398 }
3399 else
3400 continue;
3401
3402 case R_PPC_REL14:
3403 case R_PPC_REL14_BRTAKEN:
3404 case R_PPC_REL14_BRNTAKEN:
3405 case R_PPC_REL24:
3406 if (expecting_tls_get_addr
3407 && h != NULL
3408 && h == htab->tls_get_addr)
3409 {
3410 if (h->plt.refcount > 0)
3411 h->plt.refcount -= 1;
3412 }
3413 expecting_tls_get_addr = 0;
3414 continue;
3415
3416 default:
3417 expecting_tls_get_addr = 0;
3418 continue;
3419 }
3420
3421 if (h != NULL)
3422 {
3423 if (tls_set == 0)
3424 {
3425 /* We managed to get rid of a got entry. */
3426 if (h->got.refcount > 0)
3427 h->got.refcount -= 1;
3428 }
3429 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3430 }
3431 else
3432 {
3433 Elf_Internal_Sym *sym;
3434 bfd_signed_vma *lgot_refs;
3435 char *lgot_masks;
3436
3437 if (locsyms == NULL)
3438 {
3439 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3440 if (locsyms == NULL)
3441 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3442 symtab_hdr->sh_info,
3443 0, NULL, NULL, NULL);
3444 if (locsyms == NULL)
3445 {
3446 if (elf_section_data (sec)->relocs != relstart)
3447 free (relstart);
3448 return FALSE;
3449 }
3450 }
3451 sym = locsyms + r_symndx;
3452 lgot_refs = elf_local_got_refcounts (ibfd);
3453 if (lgot_refs == NULL)
3454 abort ();
3455 if (tls_set == 0)
3456 {
3457 /* We managed to get rid of a got entry. */
3458 if (lgot_refs[r_symndx] > 0)
3459 lgot_refs[r_symndx] -= 1;
3460 }
3461 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
3462 tls_mask = &lgot_masks[r_symndx];
3463 }
3464
3465 *tls_mask |= tls_set;
3466 *tls_mask &= ~tls_clear;
3467 }
3468
3469 if (elf_section_data (sec)->relocs != relstart)
3470 free (relstart);
3471 }
3472
3473 if (locsyms != NULL
3474 && (symtab_hdr->contents != (unsigned char *) locsyms))
3475 {
3476 if (!info->keep_memory)
3477 free (locsyms);
3478 else
3479 symtab_hdr->contents = (unsigned char *) locsyms;
3480 }
3481 }
3482 return TRUE;
3483 }
3484 \f
3485 /* Adjust a symbol defined by a dynamic object and referenced by a
3486 regular object. The current definition is in some section of the
3487 dynamic object, but we're not including those sections. We have to
3488 change the definition to something the rest of the link can
3489 understand. */
3490
3491 static bfd_boolean
3492 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
3493 struct elf_link_hash_entry *h)
3494 {
3495 struct ppc_elf_link_hash_table *htab;
3496 asection *s;
3497 unsigned int power_of_two;
3498
3499 #ifdef DEBUG
3500 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
3501 h->root.root.string);
3502 #endif
3503
3504 /* Make sure we know what is going on here. */
3505 htab = ppc_elf_hash_table (info);
3506 BFD_ASSERT (htab->elf.dynobj != NULL
3507 && (h->needs_plt
3508 || h->u.weakdef != NULL
3509 || (h->def_dynamic
3510 && h->ref_regular
3511 && !h->def_regular)));
3512
3513 /* Deal with function syms. */
3514 if (h->type == STT_FUNC
3515 || h->needs_plt)
3516 {
3517 /* Clear procedure linkage table information for any symbol that
3518 won't need a .plt entry. */
3519 if (h->plt.refcount <= 0
3520 || SYMBOL_CALLS_LOCAL (info, h)
3521 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3522 && h->root.type == bfd_link_hash_undefweak))
3523 {
3524 /* A PLT entry is not required/allowed when:
3525
3526 1. We are not using ld.so; because then the PLT entry
3527 can't be set up, so we can't use one. In this case,
3528 ppc_elf_adjust_dynamic_symbol won't even be called.
3529
3530 2. GC has rendered the entry unused.
3531
3532 3. We know for certain that a call to this symbol
3533 will go to this object, or will remain undefined. */
3534 h->plt.offset = (bfd_vma) -1;
3535 h->needs_plt = 0;
3536 }
3537 return TRUE;
3538 }
3539 else
3540 h->plt.offset = (bfd_vma) -1;
3541
3542 /* If this is a weak symbol, and there is a real definition, the
3543 processor independent code will have arranged for us to see the
3544 real definition first, and we can just use the same value. */
3545 if (h->u.weakdef != NULL)
3546 {
3547 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3548 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3549 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3550 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3551 if (ELIMINATE_COPY_RELOCS)
3552 h->non_got_ref = h->u.weakdef->non_got_ref;
3553 return TRUE;
3554 }
3555
3556 /* This is a reference to a symbol defined by a dynamic object which
3557 is not a function. */
3558
3559 /* If we are creating a shared library, we must presume that the
3560 only references to the symbol are via the global offset table.
3561 For such cases we need not do anything here; the relocations will
3562 be handled correctly by relocate_section. */
3563 if (info->shared)
3564 return TRUE;
3565
3566 /* If there are no references to this symbol that do not use the
3567 GOT, we don't need to generate a copy reloc. */
3568 if (!h->non_got_ref)
3569 return TRUE;
3570
3571 if (ELIMINATE_COPY_RELOCS)
3572 {
3573 struct ppc_elf_dyn_relocs *p;
3574 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3575 {
3576 s = p->sec->output_section;
3577 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3578 break;
3579 }
3580
3581 /* If we didn't find any dynamic relocs in read-only sections, then
3582 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3583 if (p == NULL)
3584 {
3585 h->non_got_ref = 0;
3586 return TRUE;
3587 }
3588 }
3589
3590 /* We must allocate the symbol in our .dynbss section, which will
3591 become part of the .bss section of the executable. There will be
3592 an entry for this symbol in the .dynsym section. The dynamic
3593 object will contain position independent code, so all references
3594 from the dynamic object to this symbol will go through the global
3595 offset table. The dynamic linker will use the .dynsym entry to
3596 determine the address it must put in the global offset table, so
3597 both the dynamic object and the regular object will refer to the
3598 same memory location for the variable.
3599
3600 Of course, if the symbol is sufficiently small, we must instead
3601 allocate it in .sbss. FIXME: It would be better to do this if and
3602 only if there were actually SDAREL relocs for that symbol. */
3603
3604 if (h->size <= elf_gp_size (htab->elf.dynobj))
3605 s = htab->dynsbss;
3606 else
3607 s = htab->dynbss;
3608 BFD_ASSERT (s != NULL);
3609
3610 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
3611 copy the initial value out of the dynamic object and into the
3612 runtime process image. We need to remember the offset into the
3613 .rela.bss section we are going to use. */
3614 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3615 {
3616 asection *srel;
3617
3618 if (h->size <= elf_gp_size (htab->elf.dynobj))
3619 srel = htab->relsbss;
3620 else
3621 srel = htab->relbss;
3622 BFD_ASSERT (srel != NULL);
3623 srel->size += sizeof (Elf32_External_Rela);
3624 h->needs_copy = 1;
3625 }
3626
3627 /* We need to figure out the alignment required for this symbol. I
3628 have no idea how ELF linkers handle this. */
3629 power_of_two = bfd_log2 (h->size);
3630 if (power_of_two > 4)
3631 power_of_two = 4;
3632
3633 /* Apply the required alignment. */
3634 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
3635 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
3636 {
3637 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
3638 return FALSE;
3639 }
3640
3641 /* Define the symbol as being at this point in the section. */
3642 h->root.u.def.section = s;
3643 h->root.u.def.value = s->size;
3644
3645 /* Increment the section size to make room for the symbol. */
3646 s->size += h->size;
3647
3648 return TRUE;
3649 }
3650 \f
3651 /* Allocate space in associated reloc sections for dynamic relocs. */
3652
3653 static bfd_boolean
3654 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3655 {
3656 struct bfd_link_info *info = inf;
3657 struct ppc_elf_link_hash_entry *eh;
3658 struct ppc_elf_link_hash_table *htab;
3659 struct ppc_elf_dyn_relocs *p;
3660
3661 if (h->root.type == bfd_link_hash_indirect)
3662 return TRUE;
3663
3664 if (h->root.type == bfd_link_hash_warning)
3665 /* When warning symbols are created, they **replace** the "real"
3666 entry in the hash table, thus we never get to see the real
3667 symbol in a hash traversal. So look at it now. */
3668 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3669
3670 htab = ppc_elf_hash_table (info);
3671 if (htab->elf.dynamic_sections_created
3672 && h->plt.refcount > 0)
3673 {
3674 /* Make sure this symbol is output as a dynamic symbol. */
3675 if (h->dynindx == -1
3676 && !h->forced_local)
3677 {
3678 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3679 return FALSE;
3680 }
3681
3682 if (info->shared
3683 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3684 {
3685 asection *s = htab->plt;
3686
3687 /* If this is the first .plt entry, make room for the special
3688 first entry. */
3689 if (s->size == 0)
3690 s->size += PLT_INITIAL_ENTRY_SIZE;
3691
3692 /* The PowerPC PLT is actually composed of two parts, the
3693 first part is 2 words (for a load and a jump), and then
3694 there is a remaining word available at the end. */
3695 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
3696 + (PLT_SLOT_SIZE
3697 * ((s->size - PLT_INITIAL_ENTRY_SIZE)
3698 / PLT_ENTRY_SIZE)));
3699
3700 /* If this symbol is not defined in a regular file, and we
3701 are not generating a shared library, then set the symbol
3702 to this location in the .plt. This is required to make
3703 function pointers compare as equal between the normal
3704 executable and the shared library. */
3705 if (! info->shared
3706 && !h->def_regular)
3707 {
3708 h->root.u.def.section = s;
3709 h->root.u.def.value = h->plt.offset;
3710 }
3711
3712 /* Make room for this entry. After the 8192nd entry, room
3713 for two entries is allocated. */
3714 s->size += PLT_ENTRY_SIZE;
3715 if ((s->size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
3716 > PLT_NUM_SINGLE_ENTRIES)
3717 s->size += PLT_ENTRY_SIZE;
3718
3719 /* We also need to make an entry in the .rela.plt section. */
3720 htab->relplt->size += sizeof (Elf32_External_Rela);
3721 }
3722 else
3723 {
3724 h->plt.offset = (bfd_vma) -1;
3725 h->needs_plt = 0;
3726 }
3727 }
3728 else
3729 {
3730 h->plt.offset = (bfd_vma) -1;
3731 h->needs_plt = 0;
3732 }
3733
3734 eh = (struct ppc_elf_link_hash_entry *) h;
3735 if (eh->elf.got.refcount > 0)
3736 {
3737 /* Make sure this symbol is output as a dynamic symbol. */
3738 if (eh->elf.dynindx == -1
3739 && !eh->elf.forced_local)
3740 {
3741 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
3742 return FALSE;
3743 }
3744
3745 if (eh->tls_mask == (TLS_TLS | TLS_LD)
3746 && !eh->elf.def_dynamic)
3747 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
3748 eh->elf.got.offset = (bfd_vma) -1;
3749 else
3750 {
3751 bfd_boolean dyn;
3752 eh->elf.got.offset = htab->got->size;
3753 if ((eh->tls_mask & TLS_TLS) != 0)
3754 {
3755 if ((eh->tls_mask & TLS_LD) != 0)
3756 htab->got->size += 8;
3757 if ((eh->tls_mask & TLS_GD) != 0)
3758 htab->got->size += 8;
3759 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3760 htab->got->size += 4;
3761 if ((eh->tls_mask & TLS_DTPREL) != 0)
3762 htab->got->size += 4;
3763 }
3764 else
3765 htab->got->size += 4;
3766 dyn = htab->elf.dynamic_sections_created;
3767 if ((info->shared
3768 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3769 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3770 || eh->elf.root.type != bfd_link_hash_undefweak))
3771 {
3772 /* All the entries we allocated need relocs. */
3773 htab->relgot->size
3774 += ((htab->got->size - eh->elf.got.offset) / 4
3775 * sizeof (Elf32_External_Rela));
3776 /* Except LD only needs one. */
3777 if ((eh->tls_mask & TLS_LD) != 0)
3778 htab->relgot->size -= sizeof (Elf32_External_Rela);
3779 }
3780 }
3781 }
3782 else
3783 eh->elf.got.offset = (bfd_vma) -1;
3784
3785 if (eh->dyn_relocs == NULL)
3786 return TRUE;
3787
3788 /* In the shared -Bsymbolic case, discard space allocated for
3789 dynamic pc-relative relocs against symbols which turn out to be
3790 defined in regular objects. For the normal shared case, discard
3791 space for relocs that have become local due to symbol visibility
3792 changes. */
3793
3794 if (info->shared)
3795 {
3796 /* Relocs that use pc_count are those that appear on a call insn,
3797 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3798 generated via assembly. We want calls to protected symbols to
3799 resolve directly to the function rather than going via the plt.
3800 If people want function pointer comparisons to work as expected
3801 then they should avoid writing weird assembly. */
3802 if (SYMBOL_CALLS_LOCAL (info, h))
3803 {
3804 struct ppc_elf_dyn_relocs **pp;
3805
3806 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3807 {
3808 p->count -= p->pc_count;
3809 p->pc_count = 0;
3810 if (p->count == 0)
3811 *pp = p->next;
3812 else
3813 pp = &p->next;
3814 }
3815 }
3816
3817 /* Also discard relocs on undefined weak syms with non-default
3818 visibility. */
3819 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3820 && h->root.type == bfd_link_hash_undefweak)
3821 eh->dyn_relocs = NULL;
3822
3823 /* Make sure undefined weak symbols are output as a dynamic symbol
3824 in PIEs. */
3825 if (info->pie
3826 && eh->dyn_relocs != NULL
3827 && h->dynindx == -1
3828 && h->root.type == bfd_link_hash_undefweak
3829 && !h->forced_local)
3830 {
3831 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3832 return FALSE;
3833 }
3834 }
3835 else if (ELIMINATE_COPY_RELOCS)
3836 {
3837 /* For the non-shared case, discard space for relocs against
3838 symbols which turn out to need copy relocs or are not
3839 dynamic. */
3840
3841 if (!h->non_got_ref
3842 && h->def_dynamic
3843 && !h->def_regular)
3844 {
3845 /* Make sure this symbol is output as a dynamic symbol.
3846 Undefined weak syms won't yet be marked as dynamic. */
3847 if (h->dynindx == -1
3848 && !h->forced_local)
3849 {
3850 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3851 return FALSE;
3852 }
3853
3854 /* If that succeeded, we know we'll be keeping all the
3855 relocs. */
3856 if (h->dynindx != -1)
3857 goto keep;
3858 }
3859
3860 eh->dyn_relocs = NULL;
3861
3862 keep: ;
3863 }
3864
3865 /* Finally, allocate space. */
3866 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3867 {
3868 asection *sreloc = elf_section_data (p->sec)->sreloc;
3869 sreloc->size += p->count * sizeof (Elf32_External_Rela);
3870 }
3871
3872 return TRUE;
3873 }
3874
3875 /* Find any dynamic relocs that apply to read-only sections. */
3876
3877 static bfd_boolean
3878 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3879 {
3880 struct ppc_elf_dyn_relocs *p;
3881
3882 if (h->root.type == bfd_link_hash_indirect)
3883 return TRUE;
3884
3885 if (h->root.type == bfd_link_hash_warning)
3886 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3887
3888 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3889 {
3890 asection *s = p->sec->output_section;
3891
3892 if (s != NULL
3893 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3894 == (SEC_READONLY | SEC_ALLOC)))
3895 {
3896 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3897
3898 /* Not an error, just cut short the traversal. */
3899 return FALSE;
3900 }
3901 }
3902 return TRUE;
3903 }
3904
3905 /* Set the sizes of the dynamic sections. */
3906
3907 static bfd_boolean
3908 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3909 struct bfd_link_info *info)
3910 {
3911 struct ppc_elf_link_hash_table *htab;
3912 asection *s;
3913 bfd_boolean relocs;
3914 bfd *ibfd;
3915
3916 #ifdef DEBUG
3917 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3918 #endif
3919
3920 htab = ppc_elf_hash_table (info);
3921 BFD_ASSERT (htab->elf.dynobj != NULL);
3922
3923 if (elf_hash_table (info)->dynamic_sections_created)
3924 {
3925 /* Set the contents of the .interp section to the interpreter. */
3926 if (info->executable)
3927 {
3928 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3929 BFD_ASSERT (s != NULL);
3930 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3931 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3932 }
3933 }
3934
3935 if (htab->tlsld_got.refcount > 0)
3936 {
3937 htab->tlsld_got.offset = htab->got->size;
3938 htab->got->size += 8;
3939 if (info->shared)
3940 htab->relgot->size += sizeof (Elf32_External_Rela);
3941 }
3942 else
3943 htab->tlsld_got.offset = (bfd_vma) -1;
3944
3945 /* Set up .got offsets for local syms, and space for local dynamic
3946 relocs. */
3947 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3948 {
3949 bfd_signed_vma *local_got;
3950 bfd_signed_vma *end_local_got;
3951 char *lgot_masks;
3952 bfd_size_type locsymcount;
3953 Elf_Internal_Shdr *symtab_hdr;
3954 asection *srel;
3955
3956 if (!is_ppc_elf_target (ibfd->xvec))
3957 continue;
3958
3959 for (s = ibfd->sections; s != NULL; s = s->next)
3960 {
3961 struct ppc_elf_dyn_relocs *p;
3962
3963 for (p = ((struct ppc_elf_dyn_relocs *)
3964 elf_section_data (s)->local_dynrel);
3965 p != NULL;
3966 p = p->next)
3967 {
3968 if (!bfd_is_abs_section (p->sec)
3969 && bfd_is_abs_section (p->sec->output_section))
3970 {
3971 /* Input section has been discarded, either because
3972 it is a copy of a linkonce section or due to
3973 linker script /DISCARD/, so we'll be discarding
3974 the relocs too. */
3975 }
3976 else if (p->count != 0)
3977 {
3978 elf_section_data (p->sec)->sreloc->size
3979 += p->count * sizeof (Elf32_External_Rela);
3980 if ((p->sec->output_section->flags
3981 & (SEC_READONLY | SEC_ALLOC))
3982 == (SEC_READONLY | SEC_ALLOC))
3983 info->flags |= DF_TEXTREL;
3984 }
3985 }
3986 }
3987
3988 local_got = elf_local_got_refcounts (ibfd);
3989 if (!local_got)
3990 continue;
3991
3992 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3993 locsymcount = symtab_hdr->sh_info;
3994 end_local_got = local_got + locsymcount;
3995 lgot_masks = (char *) end_local_got;
3996 s = htab->got;
3997 srel = htab->relgot;
3998 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3999 if (*local_got > 0)
4000 {
4001 if (*lgot_masks == (TLS_TLS | TLS_LD))
4002 {
4003 /* If just an LD reloc, we'll just use
4004 htab->tlsld_got.offset. */
4005 if (htab->tlsld_got.offset == (bfd_vma) -1)
4006 {
4007 htab->tlsld_got.offset = s->size;
4008 s->size += 8;
4009 if (info->shared)
4010 srel->size += sizeof (Elf32_External_Rela);
4011 }
4012 *local_got = (bfd_vma) -1;
4013 }
4014 else
4015 {
4016 *local_got = s->size;
4017 if ((*lgot_masks & TLS_TLS) != 0)
4018 {
4019 if ((*lgot_masks & TLS_GD) != 0)
4020 s->size += 8;
4021 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4022 s->size += 4;
4023 if ((*lgot_masks & TLS_DTPREL) != 0)
4024 s->size += 4;
4025 }
4026 else
4027 s->size += 4;
4028 if (info->shared)
4029 srel->size += ((s->size - *local_got) / 4
4030 * sizeof (Elf32_External_Rela));
4031 }
4032 }
4033 else
4034 *local_got = (bfd_vma) -1;
4035 }
4036
4037 /* Allocate space for global sym dynamic relocs. */
4038 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4039
4040 /* We've now determined the sizes of the various dynamic sections.
4041 Allocate memory for them. */
4042 relocs = FALSE;
4043 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4044 {
4045 if ((s->flags & SEC_LINKER_CREATED) == 0)
4046 continue;
4047
4048 if (s == htab->plt
4049 || s == htab->got
4050 || s == htab->sbss)
4051 {
4052 /* Strip this section if we don't need it; see the
4053 comment below. */
4054 }
4055 else if (s == htab->sdata[0].section
4056 || s == htab->sdata[1].section)
4057 {
4058 /* Strip these too. */
4059 }
4060 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4061 {
4062 if (s->size == 0)
4063 {
4064 /* If we don't need this section, strip it from the
4065 output file. This is mostly to handle .rela.bss and
4066 .rela.plt. We must create both sections in
4067 create_dynamic_sections, because they must be created
4068 before the linker maps input sections to output
4069 sections. The linker does that before
4070 adjust_dynamic_symbol is called, and it is that
4071 function which decides whether anything needs to go
4072 into these sections. */
4073 }
4074 else
4075 {
4076 /* Remember whether there are any relocation sections. */
4077 relocs = TRUE;
4078
4079 /* We use the reloc_count field as a counter if we need
4080 to copy relocs into the output file. */
4081 s->reloc_count = 0;
4082 }
4083 }
4084 else
4085 {
4086 /* It's not one of our sections, so don't allocate space. */
4087 continue;
4088 }
4089
4090 if (s->size == 0)
4091 {
4092 s->flags |= SEC_EXCLUDE;
4093 continue;
4094 }
4095
4096 if (s == htab->sbss)
4097 continue;
4098
4099 /* Allocate memory for the section contents. */
4100 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4101 if (s->contents == NULL)
4102 return FALSE;
4103 }
4104
4105 if (htab->elf.dynamic_sections_created)
4106 {
4107 /* Add some entries to the .dynamic section. We fill in the
4108 values later, in ppc_elf_finish_dynamic_sections, but we
4109 must add the entries now so that we get the correct size for
4110 the .dynamic section. The DT_DEBUG entry is filled in by the
4111 dynamic linker and used by the debugger. */
4112 #define add_dynamic_entry(TAG, VAL) \
4113 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4114
4115 if (info->executable)
4116 {
4117 if (!add_dynamic_entry (DT_DEBUG, 0))
4118 return FALSE;
4119 }
4120
4121 if (htab->plt != NULL && htab->plt->size != 0)
4122 {
4123 if (!add_dynamic_entry (DT_PLTGOT, 0)
4124 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4125 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4126 || !add_dynamic_entry (DT_JMPREL, 0))
4127 return FALSE;
4128 }
4129
4130 if (relocs)
4131 {
4132 if (!add_dynamic_entry (DT_RELA, 0)
4133 || !add_dynamic_entry (DT_RELASZ, 0)
4134 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4135 return FALSE;
4136 }
4137
4138 /* If any dynamic relocs apply to a read-only section, then we
4139 need a DT_TEXTREL entry. */
4140 if ((info->flags & DF_TEXTREL) == 0)
4141 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4142 info);
4143
4144 if ((info->flags & DF_TEXTREL) != 0)
4145 {
4146 if (!add_dynamic_entry (DT_TEXTREL, 0))
4147 return FALSE;
4148 }
4149 }
4150 #undef add_dynamic_entry
4151
4152 return TRUE;
4153 }
4154 \f
4155 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4156
4157 static const int shared_stub_entry[] =
4158 {
4159 0x7c0802a6, /* mflr 0 */
4160 0x429f0005, /* bcl 20, 31, .Lxxx */
4161 0x7d6802a6, /* mflr 11 */
4162 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4163 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4164 0x7c0803a6, /* mtlr 0 */
4165 0x7d6903a6, /* mtctr 11 */
4166 0x4e800420, /* bctr */
4167 };
4168
4169 static const int stub_entry[] =
4170 {
4171 0x3d600000, /* lis 11,xxx@ha */
4172 0x396b0000, /* addi 11,11,xxx@l */
4173 0x7d6903a6, /* mtctr 11 */
4174 0x4e800420, /* bctr */
4175 };
4176
4177 static bfd_boolean
4178 ppc_elf_relax_section (bfd *abfd,
4179 asection *isec,
4180 struct bfd_link_info *link_info,
4181 bfd_boolean *again)
4182 {
4183 struct one_fixup
4184 {
4185 struct one_fixup *next;
4186 asection *tsec;
4187 bfd_vma toff;
4188 bfd_vma trampoff;
4189 };
4190
4191 Elf_Internal_Shdr *symtab_hdr;
4192 bfd_byte *contents = NULL;
4193 Elf_Internal_Sym *isymbuf = NULL;
4194 Elf_Internal_Rela *internal_relocs = NULL;
4195 Elf_Internal_Rela *irel, *irelend;
4196 struct one_fixup *fixups = NULL;
4197 bfd_boolean changed;
4198 struct ppc_elf_link_hash_table *ppc_info;
4199 bfd_size_type trampoff;
4200
4201 *again = FALSE;
4202
4203 /* Nothing to do if there are no relocations, and no need to do
4204 anything with non-alloc sections. */
4205 if ((isec->flags & SEC_ALLOC) == 0
4206 || (isec->flags & SEC_RELOC) == 0
4207 || isec->reloc_count == 0)
4208 return TRUE;
4209
4210 trampoff = (isec->size + 3) & (bfd_vma) -4;
4211 /* Space for a branch around any trampolines. */
4212 trampoff += 4;
4213
4214 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4215
4216 /* Get a copy of the native relocations. */
4217 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
4218 link_info->keep_memory);
4219 if (internal_relocs == NULL)
4220 goto error_return;
4221
4222 ppc_info = ppc_elf_hash_table (link_info);
4223 irelend = internal_relocs + isec->reloc_count;
4224
4225 for (irel = internal_relocs; irel < irelend; irel++)
4226 {
4227 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
4228 bfd_vma symaddr, reladdr, toff, roff;
4229 asection *tsec;
4230 struct one_fixup *f;
4231 size_t insn_offset = 0;
4232 bfd_vma max_branch_offset, val;
4233 bfd_byte *hit_addr;
4234 unsigned long t0;
4235 unsigned char sym_type;
4236
4237 switch (r_type)
4238 {
4239 case R_PPC_REL24:
4240 case R_PPC_LOCAL24PC:
4241 case R_PPC_PLTREL24:
4242 max_branch_offset = 1 << 25;
4243 break;
4244
4245 case R_PPC_REL14:
4246 case R_PPC_REL14_BRTAKEN:
4247 case R_PPC_REL14_BRNTAKEN:
4248 max_branch_offset = 1 << 15;
4249 break;
4250
4251 default:
4252 continue;
4253 }
4254
4255 /* Get the value of the symbol referred to by the reloc. */
4256 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4257 {
4258 /* A local symbol. */
4259 Elf_Internal_Sym *isym;
4260
4261 /* Read this BFD's local symbols. */
4262 if (isymbuf == NULL)
4263 {
4264 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4265 if (isymbuf == NULL)
4266 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
4267 symtab_hdr->sh_info, 0,
4268 NULL, NULL, NULL);
4269 if (isymbuf == 0)
4270 goto error_return;
4271 }
4272 isym = isymbuf + ELF32_R_SYM (irel->r_info);
4273 if (isym->st_shndx == SHN_UNDEF)
4274 continue; /* We can't do anything with undefined symbols. */
4275 else if (isym->st_shndx == SHN_ABS)
4276 tsec = bfd_abs_section_ptr;
4277 else if (isym->st_shndx == SHN_COMMON)
4278 tsec = bfd_com_section_ptr;
4279 else
4280 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4281
4282 toff = isym->st_value;
4283 sym_type = ELF_ST_TYPE (isym->st_info);
4284 }
4285 else
4286 {
4287 /* Global symbol handling. */
4288 unsigned long indx;
4289 struct elf_link_hash_entry *h;
4290
4291 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
4292 h = elf_sym_hashes (abfd)[indx];
4293
4294 while (h->root.type == bfd_link_hash_indirect
4295 || h->root.type == bfd_link_hash_warning)
4296 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4297
4298 if (r_type == R_PPC_PLTREL24
4299 && ppc_info->plt != NULL
4300 && h->plt.offset != (bfd_vma) -1)
4301 {
4302 tsec = ppc_info->plt;
4303 toff = h->plt.offset;
4304 }
4305 else if (h->root.type == bfd_link_hash_defined
4306 || h->root.type == bfd_link_hash_defweak)
4307 {
4308 tsec = h->root.u.def.section;
4309 toff = h->root.u.def.value;
4310 }
4311 else
4312 continue;
4313
4314 sym_type = h->type;
4315 }
4316
4317 /* If the branch and target are in the same section, you have
4318 no hope of adding stubs. We'll error out later should the
4319 branch overflow. */
4320 if (tsec == isec)
4321 continue;
4322
4323 /* There probably isn't any reason to handle symbols in
4324 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
4325 attribute for a code section, and we are only looking at
4326 branches. However, implement it correctly here as a
4327 reference for other target relax_section functions. */
4328 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
4329 {
4330 /* At this stage in linking, no SEC_MERGE symbol has been
4331 adjusted, so all references to such symbols need to be
4332 passed through _bfd_merged_section_offset. (Later, in
4333 relocate_section, all SEC_MERGE symbols *except* for
4334 section symbols have been adjusted.)
4335
4336 gas may reduce relocations against symbols in SEC_MERGE
4337 sections to a relocation against the section symbol when
4338 the original addend was zero. When the reloc is against
4339 a section symbol we should include the addend in the
4340 offset passed to _bfd_merged_section_offset, since the
4341 location of interest is the original symbol. On the
4342 other hand, an access to "sym+addend" where "sym" is not
4343 a section symbol should not include the addend; Such an
4344 access is presumed to be an offset from "sym"; The
4345 location of interest is just "sym". */
4346 if (sym_type == STT_SECTION)
4347 toff += irel->r_addend;
4348
4349 toff = _bfd_merged_section_offset (abfd, &tsec,
4350 elf_section_data (tsec)->sec_info,
4351 toff);
4352
4353 if (sym_type != STT_SECTION)
4354 toff += irel->r_addend;
4355 }
4356 else
4357 toff += irel->r_addend;
4358
4359 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
4360
4361 roff = irel->r_offset;
4362 reladdr = isec->output_section->vma + isec->output_offset + roff;
4363
4364 /* If the branch is in range, no need to do anything. */
4365 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
4366 continue;
4367
4368 /* Look for an existing fixup to this address. */
4369 for (f = fixups; f ; f = f->next)
4370 if (f->tsec == tsec && f->toff == toff)
4371 break;
4372
4373 if (f == NULL)
4374 {
4375 size_t size;
4376 unsigned long stub_rtype;
4377
4378 val = trampoff - roff;
4379 if (val >= max_branch_offset)
4380 /* Oh dear, we can't reach a trampoline. Don't try to add
4381 one. We'll report an error later. */
4382 continue;
4383
4384 if (link_info->shared)
4385 {
4386 size = 4 * ARRAY_SIZE (shared_stub_entry);
4387 insn_offset = 12;
4388 stub_rtype = R_PPC_RELAX32PC;
4389 }
4390 else
4391 {
4392 size = 4 * ARRAY_SIZE (stub_entry);
4393 insn_offset = 0;
4394 stub_rtype = R_PPC_RELAX32;
4395 }
4396
4397 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
4398 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
4399 abort ();
4400 if (tsec == ppc_info->plt)
4401 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
4402
4403 /* Hijack the old relocation. Since we need two
4404 relocations for this use a "composite" reloc. */
4405 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
4406 stub_rtype);
4407 irel->r_offset = trampoff + insn_offset;
4408
4409 /* Record the fixup so we don't do it again this section. */
4410 f = bfd_malloc (sizeof (*f));
4411 f->next = fixups;
4412 f->tsec = tsec;
4413 f->toff = toff;
4414 f->trampoff = trampoff;
4415 fixups = f;
4416
4417 trampoff += size;
4418 }
4419 else
4420 {
4421 val = f->trampoff - roff;
4422 if (val >= max_branch_offset)
4423 continue;
4424
4425 /* Nop out the reloc, since we're finalizing things here. */
4426 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
4427 }
4428
4429 /* Get the section contents. */
4430 if (contents == NULL)
4431 {
4432 /* Get cached copy if it exists. */
4433 if (elf_section_data (isec)->this_hdr.contents != NULL)
4434 contents = elf_section_data (isec)->this_hdr.contents;
4435 else
4436 {
4437 /* Go get them off disk. */
4438 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
4439 goto error_return;
4440 }
4441 }
4442
4443 /* Fix up the existing branch to hit the trampoline. */
4444 hit_addr = contents + roff;
4445 switch (r_type)
4446 {
4447 case R_PPC_REL24:
4448 case R_PPC_LOCAL24PC:
4449 case R_PPC_PLTREL24:
4450 t0 = bfd_get_32 (abfd, hit_addr);
4451 t0 &= ~0x3fffffc;
4452 t0 |= val & 0x3fffffc;
4453 bfd_put_32 (abfd, t0, hit_addr);
4454 break;
4455
4456 case R_PPC_REL14:
4457 case R_PPC_REL14_BRTAKEN:
4458 case R_PPC_REL14_BRNTAKEN:
4459 t0 = bfd_get_32 (abfd, hit_addr);
4460 t0 &= ~0xfffc;
4461 t0 |= val & 0xfffc;
4462 bfd_put_32 (abfd, t0, hit_addr);
4463 break;
4464 }
4465 }
4466
4467 /* Write out the trampolines. */
4468 changed = fixups != NULL;
4469 if (fixups != NULL)
4470 {
4471 const int *stub;
4472 bfd_byte *dest;
4473 bfd_vma val;
4474 int i, size;
4475
4476 do
4477 {
4478 struct one_fixup *f = fixups;
4479 fixups = fixups->next;
4480 free (f);
4481 }
4482 while (fixups);
4483
4484 contents = bfd_realloc (contents, trampoff);
4485 if (contents == NULL)
4486 goto error_return;
4487
4488 isec->size = (isec->size + 3) & (bfd_vma) -4;
4489 /* Branch around the trampolines. */
4490 val = trampoff - isec->size + 0x48000000;
4491 dest = contents + isec->size;
4492 isec->size = trampoff;
4493 bfd_put_32 (abfd, val, dest);
4494 dest += 4;
4495
4496 if (link_info->shared)
4497 {
4498 stub = shared_stub_entry;
4499 size = ARRAY_SIZE (shared_stub_entry);
4500 }
4501 else
4502 {
4503 stub = stub_entry;
4504 size = ARRAY_SIZE (stub_entry);
4505 }
4506
4507 i = 0;
4508 while (dest < contents + trampoff)
4509 {
4510 bfd_put_32 (abfd, stub[i], dest);
4511 i++;
4512 if (i == size)
4513 i = 0;
4514 dest += 4;
4515 }
4516 BFD_ASSERT (i == 0);
4517 }
4518
4519 if (isymbuf != NULL
4520 && symtab_hdr->contents != (unsigned char *) isymbuf)
4521 {
4522 if (! link_info->keep_memory)
4523 free (isymbuf);
4524 else
4525 {
4526 /* Cache the symbols for elf_link_input_bfd. */
4527 symtab_hdr->contents = (unsigned char *) isymbuf;
4528 }
4529 }
4530
4531 if (contents != NULL
4532 && elf_section_data (isec)->this_hdr.contents != contents)
4533 {
4534 if (!changed && !link_info->keep_memory)
4535 free (contents);
4536 else
4537 {
4538 /* Cache the section contents for elf_link_input_bfd. */
4539 elf_section_data (isec)->this_hdr.contents = contents;
4540 }
4541 }
4542
4543 if (elf_section_data (isec)->relocs != internal_relocs)
4544 {
4545 if (!changed)
4546 free (internal_relocs);
4547 else
4548 elf_section_data (isec)->relocs = internal_relocs;
4549 }
4550
4551 *again = changed;
4552 return TRUE;
4553
4554 error_return:
4555 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
4556 free (isymbuf);
4557 if (contents != NULL
4558 && elf_section_data (isec)->this_hdr.contents != contents)
4559 free (contents);
4560 if (internal_relocs != NULL
4561 && elf_section_data (isec)->relocs != internal_relocs)
4562 free (internal_relocs);
4563 return FALSE;
4564 }
4565 \f
4566 /* Set _SDA_BASE_, _SDA2_BASE, and sbss start and end syms. They are
4567 set here rather than via PROVIDE in the default linker script,
4568 because using PROVIDE inside an output section statement results in
4569 unnecessary output sections. Using PROVIDE outside an output section
4570 statement runs the risk of section alignment affecting where the
4571 section starts. */
4572
4573 bfd_boolean
4574 ppc_elf_set_sdata_syms (bfd *obfd, struct bfd_link_info *info)
4575 {
4576 struct ppc_elf_link_hash_table *htab;
4577 unsigned i;
4578 asection *s;
4579 bfd_vma val;
4580
4581 htab = ppc_elf_hash_table (info);
4582
4583 for (i = 0; i < 2; i++)
4584 {
4585 elf_linker_section_t *lsect = &htab->sdata[i];
4586
4587 s = lsect->section;
4588 if (s != NULL)
4589 s = s->output_section;
4590 if (s == NULL)
4591 s = bfd_get_section_by_name (obfd, lsect->name);
4592 if (s == NULL)
4593 s = bfd_get_section_by_name (obfd, lsect->bss_name);
4594
4595 val = 0;
4596 if (s != NULL)
4597 val = s->vma + 32768;
4598 lsect->sym_val = val;
4599
4600 _bfd_elf_provide_symbol (info, lsect->sym_name, val);
4601 }
4602
4603 s = bfd_get_section_by_name (obfd, ".sbss");
4604 val = 0;
4605 if (s != NULL)
4606 val = s->vma;
4607 _bfd_elf_provide_symbol (info, "__sbss_start", val);
4608 _bfd_elf_provide_symbol (info, "___sbss_start", val);
4609 if (s != NULL)
4610 val += s->size;
4611 _bfd_elf_provide_symbol (info, "__sbss_end", val);
4612 _bfd_elf_provide_symbol (info, "___sbss_end", val);
4613 return TRUE;
4614 }
4615 \f
4616 /* Fill in the address for a pointer generated in a linker section. */
4617
4618 static bfd_vma
4619 elf_finish_pointer_linker_section (bfd *input_bfd,
4620 elf_linker_section_t *lsect,
4621 struct elf_link_hash_entry *h,
4622 bfd_vma relocation,
4623 const Elf_Internal_Rela *rel)
4624 {
4625 elf_linker_section_pointers_t *linker_section_ptr;
4626
4627 BFD_ASSERT (lsect != NULL);
4628
4629 if (h != NULL)
4630 {
4631 /* Handle global symbol. */
4632 struct ppc_elf_link_hash_entry *eh;
4633
4634 eh = (struct ppc_elf_link_hash_entry *) h;
4635 BFD_ASSERT (eh->elf.def_regular);
4636 linker_section_ptr = eh->linker_section_pointer;
4637 }
4638 else
4639 {
4640 /* Handle local symbol. */
4641 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
4642
4643 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
4644 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
4645 }
4646
4647 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
4648 rel->r_addend,
4649 lsect);
4650 BFD_ASSERT (linker_section_ptr != NULL);
4651
4652 /* Offset will always be a multiple of four, so use the bottom bit
4653 as a "written" flag. */
4654 if ((linker_section_ptr->offset & 1) == 0)
4655 {
4656 bfd_put_32 (lsect->section->owner,
4657 relocation + linker_section_ptr->addend,
4658 lsect->section->contents + linker_section_ptr->offset);
4659 linker_section_ptr->offset += 1;
4660 }
4661
4662 relocation = (lsect->section->output_offset
4663 + linker_section_ptr->offset - 1
4664 - 0x8000);
4665
4666 #ifdef DEBUG
4667 fprintf (stderr,
4668 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
4669 lsect->name, (long) relocation, (long) relocation);
4670 #endif
4671
4672 /* Subtract out the addend, because it will get added back in by the normal
4673 processing. */
4674 return relocation - linker_section_ptr->addend;
4675 }
4676
4677 /* The RELOCATE_SECTION function is called by the ELF backend linker
4678 to handle the relocations for a section.
4679
4680 The relocs are always passed as Rela structures; if the section
4681 actually uses Rel structures, the r_addend field will always be
4682 zero.
4683
4684 This function is responsible for adjust the section contents as
4685 necessary, and (if using Rela relocs and generating a
4686 relocatable output file) adjusting the reloc addend as
4687 necessary.
4688
4689 This function does not have to worry about setting the reloc
4690 address or the reloc symbol index.
4691
4692 LOCAL_SYMS is a pointer to the swapped in local symbols.
4693
4694 LOCAL_SECTIONS is an array giving the section in the input file
4695 corresponding to the st_shndx field of each local symbol.
4696
4697 The global hash table entry for the global symbols can be found
4698 via elf_sym_hashes (input_bfd).
4699
4700 When generating relocatable output, this function must handle
4701 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4702 going to be the section symbol corresponding to the output
4703 section, which means that the addend must be adjusted
4704 accordingly. */
4705
4706 static bfd_boolean
4707 ppc_elf_relocate_section (bfd *output_bfd,
4708 struct bfd_link_info *info,
4709 bfd *input_bfd,
4710 asection *input_section,
4711 bfd_byte *contents,
4712 Elf_Internal_Rela *relocs,
4713 Elf_Internal_Sym *local_syms,
4714 asection **local_sections)
4715 {
4716 Elf_Internal_Shdr *symtab_hdr;
4717 struct elf_link_hash_entry **sym_hashes;
4718 struct ppc_elf_link_hash_table *htab;
4719 Elf_Internal_Rela *rel;
4720 Elf_Internal_Rela *relend;
4721 Elf_Internal_Rela outrel;
4722 bfd_byte *loc;
4723 asection *sreloc = NULL;
4724 bfd_vma *local_got_offsets;
4725 bfd_boolean ret = TRUE;
4726
4727 #ifdef DEBUG
4728 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
4729 "%ld relocations%s",
4730 input_bfd, input_section,
4731 (long) input_section->reloc_count,
4732 (info->relocatable) ? " (relocatable)" : "");
4733 #endif
4734
4735 if (info->relocatable)
4736 return TRUE;
4737
4738 /* Initialize howto table if not already done. */
4739 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4740 ppc_elf_howto_init ();
4741
4742 htab = ppc_elf_hash_table (info);
4743 local_got_offsets = elf_local_got_offsets (input_bfd);
4744 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4745 sym_hashes = elf_sym_hashes (input_bfd);
4746 rel = relocs;
4747 relend = relocs + input_section->reloc_count;
4748 for (; rel < relend; rel++)
4749 {
4750 enum elf_ppc_reloc_type r_type;
4751 bfd_vma addend;
4752 bfd_reloc_status_type r;
4753 Elf_Internal_Sym *sym;
4754 asection *sec;
4755 struct elf_link_hash_entry *h;
4756 const char *sym_name;
4757 reloc_howto_type *howto;
4758 unsigned long r_symndx;
4759 bfd_vma relocation;
4760 bfd_vma branch_bit, insn, from;
4761 bfd_boolean unresolved_reloc;
4762 bfd_boolean warned;
4763 unsigned int tls_type, tls_mask, tls_gd;
4764
4765 r_type = ELF32_R_TYPE (rel->r_info);
4766 sym = NULL;
4767 sec = NULL;
4768 h = NULL;
4769 unresolved_reloc = FALSE;
4770 warned = FALSE;
4771 r_symndx = ELF32_R_SYM (rel->r_info);
4772
4773 if (r_symndx < symtab_hdr->sh_info)
4774 {
4775 sym = local_syms + r_symndx;
4776 sec = local_sections[r_symndx];
4777 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
4778
4779 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4780 }
4781 else
4782 {
4783 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4784 r_symndx, symtab_hdr, sym_hashes,
4785 h, sec, relocation,
4786 unresolved_reloc, warned);
4787
4788 sym_name = h->root.root.string;
4789 }
4790
4791 /* TLS optimizations. Replace instruction sequences and relocs
4792 based on information we collected in tls_optimize. We edit
4793 RELOCS so that --emit-relocs will output something sensible
4794 for the final instruction stream. */
4795 tls_mask = 0;
4796 tls_gd = 0;
4797 if (IS_PPC_TLS_RELOC (r_type))
4798 {
4799 if (h != NULL)
4800 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4801 else if (local_got_offsets != NULL)
4802 {
4803 char *lgot_masks;
4804 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4805 tls_mask = lgot_masks[r_symndx];
4806 }
4807 }
4808
4809 /* Ensure reloc mapping code below stays sane. */
4810 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4811 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4812 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4813 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4814 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4815 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4816 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4817 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4818 abort ();
4819 switch (r_type)
4820 {
4821 default:
4822 break;
4823
4824 case R_PPC_GOT_TPREL16:
4825 case R_PPC_GOT_TPREL16_LO:
4826 if (tls_mask != 0
4827 && (tls_mask & TLS_TPREL) == 0)
4828 {
4829 bfd_vma insn;
4830 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4831 insn &= 31 << 21;
4832 insn |= 0x3c020000; /* addis 0,2,0 */
4833 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4834 r_type = R_PPC_TPREL16_HA;
4835 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4836 }
4837 break;
4838
4839 case R_PPC_TLS:
4840 if (tls_mask != 0
4841 && (tls_mask & TLS_TPREL) == 0)
4842 {
4843 bfd_vma insn, rtra;
4844 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4845 if ((insn & ((31 << 26) | (31 << 11)))
4846 == ((31 << 26) | (2 << 11)))
4847 rtra = insn & ((1 << 26) - (1 << 16));
4848 else if ((insn & ((31 << 26) | (31 << 16)))
4849 == ((31 << 26) | (2 << 16)))
4850 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4851 else
4852 abort ();
4853 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4854 /* add -> addi. */
4855 insn = 14 << 26;
4856 else if ((insn & (31 << 1)) == 23 << 1
4857 && ((insn & (31 << 6)) < 14 << 6
4858 || ((insn & (31 << 6)) >= 16 << 6
4859 && (insn & (31 << 6)) < 24 << 6)))
4860 /* load and store indexed -> dform. */
4861 insn = (32 | ((insn >> 6) & 31)) << 26;
4862 else if ((insn & (31 << 1)) == 21 << 1
4863 && (insn & (0x1a << 6)) == 0)
4864 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4865 insn = (((58 | ((insn >> 6) & 4)) << 26)
4866 | ((insn >> 6) & 1));
4867 else if ((insn & (31 << 1)) == 21 << 1
4868 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4869 /* lwax -> lwa. */
4870 insn = (58 << 26) | 2;
4871 else
4872 abort ();
4873 insn |= rtra;
4874 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4875 r_type = R_PPC_TPREL16_LO;
4876 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4877 /* Was PPC_TLS which sits on insn boundary, now
4878 PPC_TPREL16_LO which is at insn+2. */
4879 rel->r_offset += 2;
4880 }
4881 break;
4882
4883 case R_PPC_GOT_TLSGD16_HI:
4884 case R_PPC_GOT_TLSGD16_HA:
4885 tls_gd = TLS_TPRELGD;
4886 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4887 goto tls_gdld_hi;
4888 break;
4889
4890 case R_PPC_GOT_TLSLD16_HI:
4891 case R_PPC_GOT_TLSLD16_HA:
4892 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4893 {
4894 tls_gdld_hi:
4895 if ((tls_mask & tls_gd) != 0)
4896 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4897 + R_PPC_GOT_TPREL16);
4898 else
4899 {
4900 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4901 rel->r_offset -= 2;
4902 r_type = R_PPC_NONE;
4903 }
4904 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4905 }
4906 break;
4907
4908 case R_PPC_GOT_TLSGD16:
4909 case R_PPC_GOT_TLSGD16_LO:
4910 tls_gd = TLS_TPRELGD;
4911 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4912 goto tls_get_addr_check;
4913 break;
4914
4915 case R_PPC_GOT_TLSLD16:
4916 case R_PPC_GOT_TLSLD16_LO:
4917 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4918 {
4919 tls_get_addr_check:
4920 if (rel + 1 < relend)
4921 {
4922 enum elf_ppc_reloc_type r_type2;
4923 unsigned long r_symndx2;
4924 struct elf_link_hash_entry *h2;
4925 bfd_vma insn1, insn2;
4926 bfd_vma offset;
4927
4928 /* The next instruction should be a call to
4929 __tls_get_addr. Peek at the reloc to be sure. */
4930 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4931 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4932 if (r_symndx2 < symtab_hdr->sh_info
4933 || (r_type2 != R_PPC_REL14
4934 && r_type2 != R_PPC_REL14_BRTAKEN
4935 && r_type2 != R_PPC_REL14_BRNTAKEN
4936 && r_type2 != R_PPC_REL24
4937 && r_type2 != R_PPC_PLTREL24))
4938 break;
4939
4940 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4941 while (h2->root.type == bfd_link_hash_indirect
4942 || h2->root.type == bfd_link_hash_warning)
4943 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4944 if (h2 == NULL || h2 != htab->tls_get_addr)
4945 break;
4946
4947 /* OK, it checks out. Replace the call. */
4948 offset = rel[1].r_offset;
4949 insn1 = bfd_get_32 (output_bfd,
4950 contents + rel->r_offset - 2);
4951 if ((tls_mask & tls_gd) != 0)
4952 {
4953 /* IE */
4954 insn1 &= (1 << 26) - 1;
4955 insn1 |= 32 << 26; /* lwz */
4956 insn2 = 0x7c631214; /* add 3,3,2 */
4957 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4958 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4959 + R_PPC_GOT_TPREL16);
4960 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4961 }
4962 else
4963 {
4964 /* LE */
4965 insn1 = 0x3c620000; /* addis 3,2,0 */
4966 insn2 = 0x38630000; /* addi 3,3,0 */
4967 if (tls_gd == 0)
4968 {
4969 /* Was an LD reloc. */
4970 r_symndx = 0;
4971 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4972 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4973 }
4974 r_type = R_PPC_TPREL16_HA;
4975 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4976 rel[1].r_info = ELF32_R_INFO (r_symndx,
4977 R_PPC_TPREL16_LO);
4978 rel[1].r_offset += 2;
4979 }
4980 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4981 bfd_put_32 (output_bfd, insn2, contents + offset);
4982 if (tls_gd == 0)
4983 {
4984 /* We changed the symbol on an LD reloc. Start over
4985 in order to get h, sym, sec etc. right. */
4986 rel--;
4987 continue;
4988 }
4989 }
4990 }
4991 break;
4992 }
4993
4994 /* Handle other relocations that tweak non-addend part of insn. */
4995 branch_bit = 0;
4996 switch (r_type)
4997 {
4998 default:
4999 break;
5000
5001 /* Branch taken prediction relocations. */
5002 case R_PPC_ADDR14_BRTAKEN:
5003 case R_PPC_REL14_BRTAKEN:
5004 branch_bit = BRANCH_PREDICT_BIT;
5005 /* Fall thru */
5006
5007 /* Branch not taken prediction relocations. */
5008 case R_PPC_ADDR14_BRNTAKEN:
5009 case R_PPC_REL14_BRNTAKEN:
5010 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5011 insn &= ~BRANCH_PREDICT_BIT;
5012 insn |= branch_bit;
5013
5014 from = (rel->r_offset
5015 + input_section->output_offset
5016 + input_section->output_section->vma);
5017
5018 /* Invert 'y' bit if not the default. */
5019 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5020 insn ^= BRANCH_PREDICT_BIT;
5021
5022 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5023 break;
5024 }
5025
5026 addend = rel->r_addend;
5027 tls_type = 0;
5028 howto = NULL;
5029 if (r_type < R_PPC_max)
5030 howto = ppc_elf_howto_table[r_type];
5031 switch (r_type)
5032 {
5033 default:
5034 (*_bfd_error_handler)
5035 (_("%B: unknown relocation type %d for symbol %s"),
5036 input_bfd, (int) r_type, sym_name);
5037
5038 bfd_set_error (bfd_error_bad_value);
5039 ret = FALSE;
5040 continue;
5041
5042 case R_PPC_NONE:
5043 case R_PPC_TLS:
5044 case R_PPC_EMB_MRKREF:
5045 case R_PPC_GNU_VTINHERIT:
5046 case R_PPC_GNU_VTENTRY:
5047 continue;
5048
5049 /* GOT16 relocations. Like an ADDR16 using the symbol's
5050 address in the GOT as relocation value instead of the
5051 symbol's value itself. Also, create a GOT entry for the
5052 symbol and put the symbol value there. */
5053 case R_PPC_GOT_TLSGD16:
5054 case R_PPC_GOT_TLSGD16_LO:
5055 case R_PPC_GOT_TLSGD16_HI:
5056 case R_PPC_GOT_TLSGD16_HA:
5057 tls_type = TLS_TLS | TLS_GD;
5058 goto dogot;
5059
5060 case R_PPC_GOT_TLSLD16:
5061 case R_PPC_GOT_TLSLD16_LO:
5062 case R_PPC_GOT_TLSLD16_HI:
5063 case R_PPC_GOT_TLSLD16_HA:
5064 tls_type = TLS_TLS | TLS_LD;
5065 goto dogot;
5066
5067 case R_PPC_GOT_TPREL16:
5068 case R_PPC_GOT_TPREL16_LO:
5069 case R_PPC_GOT_TPREL16_HI:
5070 case R_PPC_GOT_TPREL16_HA:
5071 tls_type = TLS_TLS | TLS_TPREL;
5072 goto dogot;
5073
5074 case R_PPC_GOT_DTPREL16:
5075 case R_PPC_GOT_DTPREL16_LO:
5076 case R_PPC_GOT_DTPREL16_HI:
5077 case R_PPC_GOT_DTPREL16_HA:
5078 tls_type = TLS_TLS | TLS_DTPREL;
5079 goto dogot;
5080
5081 case R_PPC_GOT16:
5082 case R_PPC_GOT16_LO:
5083 case R_PPC_GOT16_HI:
5084 case R_PPC_GOT16_HA:
5085 dogot:
5086 {
5087 /* Relocation is to the entry for this symbol in the global
5088 offset table. */
5089 bfd_vma off;
5090 bfd_vma *offp;
5091 unsigned long indx;
5092
5093 if (htab->got == NULL)
5094 abort ();
5095
5096 indx = 0;
5097 if (tls_type == (TLS_TLS | TLS_LD)
5098 && (h == NULL
5099 || !h->def_dynamic))
5100 offp = &htab->tlsld_got.offset;
5101 else if (h != NULL)
5102 {
5103 bfd_boolean dyn;
5104 dyn = htab->elf.dynamic_sections_created;
5105 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5106 || (info->shared
5107 && SYMBOL_REFERENCES_LOCAL (info, h)))
5108 /* This is actually a static link, or it is a
5109 -Bsymbolic link and the symbol is defined
5110 locally, or the symbol was forced to be local
5111 because of a version file. */
5112 ;
5113 else
5114 {
5115 indx = h->dynindx;
5116 unresolved_reloc = FALSE;
5117 }
5118 offp = &h->got.offset;
5119 }
5120 else
5121 {
5122 if (local_got_offsets == NULL)
5123 abort ();
5124 offp = &local_got_offsets[r_symndx];
5125 }
5126
5127 /* The offset must always be a multiple of 4. We use the
5128 least significant bit to record whether we have already
5129 processed this entry. */
5130 off = *offp;
5131 if ((off & 1) != 0)
5132 off &= ~1;
5133 else
5134 {
5135 unsigned int tls_m = (tls_mask
5136 & (TLS_LD | TLS_GD | TLS_DTPREL
5137 | TLS_TPREL | TLS_TPRELGD));
5138
5139 if (offp == &htab->tlsld_got.offset)
5140 tls_m = TLS_LD;
5141 else if (h == NULL
5142 || !h->def_dynamic)
5143 tls_m &= ~TLS_LD;
5144
5145 /* We might have multiple got entries for this sym.
5146 Initialize them all. */
5147 do
5148 {
5149 int tls_ty = 0;
5150
5151 if ((tls_m & TLS_LD) != 0)
5152 {
5153 tls_ty = TLS_TLS | TLS_LD;
5154 tls_m &= ~TLS_LD;
5155 }
5156 else if ((tls_m & TLS_GD) != 0)
5157 {
5158 tls_ty = TLS_TLS | TLS_GD;
5159 tls_m &= ~TLS_GD;
5160 }
5161 else if ((tls_m & TLS_DTPREL) != 0)
5162 {
5163 tls_ty = TLS_TLS | TLS_DTPREL;
5164 tls_m &= ~TLS_DTPREL;
5165 }
5166 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5167 {
5168 tls_ty = TLS_TLS | TLS_TPREL;
5169 tls_m = 0;
5170 }
5171
5172 /* Generate relocs for the dynamic linker. */
5173 if ((info->shared || indx != 0)
5174 && (h == NULL
5175 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5176 || h->root.type != bfd_link_hash_undefweak))
5177 {
5178 outrel.r_offset = (htab->got->output_section->vma
5179 + htab->got->output_offset
5180 + off);
5181 outrel.r_addend = 0;
5182 if (tls_ty & (TLS_LD | TLS_GD))
5183 {
5184 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5185 if (tls_ty == (TLS_TLS | TLS_GD))
5186 {
5187 loc = htab->relgot->contents;
5188 loc += (htab->relgot->reloc_count++
5189 * sizeof (Elf32_External_Rela));
5190 bfd_elf32_swap_reloca_out (output_bfd,
5191 &outrel, loc);
5192 outrel.r_offset += 4;
5193 outrel.r_info
5194 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5195 }
5196 }
5197 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5198 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5199 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5200 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5201 else if (indx == 0)
5202 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5203 else
5204 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5205 if (indx == 0)
5206 {
5207 outrel.r_addend += relocation;
5208 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5209 outrel.r_addend -= htab->elf.tls_sec->vma;
5210 }
5211 loc = htab->relgot->contents;
5212 loc += (htab->relgot->reloc_count++
5213 * sizeof (Elf32_External_Rela));
5214 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5215 }
5216
5217 /* Init the .got section contents if we're not
5218 emitting a reloc. */
5219 else
5220 {
5221 bfd_vma value = relocation;
5222
5223 if (tls_ty == (TLS_TLS | TLS_LD))
5224 value = 1;
5225 else if (tls_ty != 0)
5226 {
5227 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5228 if (tls_ty == (TLS_TLS | TLS_TPREL))
5229 value += DTP_OFFSET - TP_OFFSET;
5230
5231 if (tls_ty == (TLS_TLS | TLS_GD))
5232 {
5233 bfd_put_32 (output_bfd, value,
5234 htab->got->contents + off + 4);
5235 value = 1;
5236 }
5237 }
5238 bfd_put_32 (output_bfd, value,
5239 htab->got->contents + off);
5240 }
5241
5242 off += 4;
5243 if (tls_ty & (TLS_LD | TLS_GD))
5244 off += 4;
5245 }
5246 while (tls_m != 0);
5247
5248 off = *offp;
5249 *offp = off | 1;
5250 }
5251
5252 if (off >= (bfd_vma) -2)
5253 abort ();
5254
5255 if ((tls_type & TLS_TLS) != 0)
5256 {
5257 if (tls_type != (TLS_TLS | TLS_LD))
5258 {
5259 if ((tls_mask & TLS_LD) != 0
5260 && !(h == NULL
5261 || !h->def_dynamic))
5262 off += 8;
5263 if (tls_type != (TLS_TLS | TLS_GD))
5264 {
5265 if ((tls_mask & TLS_GD) != 0)
5266 off += 8;
5267 if (tls_type != (TLS_TLS | TLS_DTPREL))
5268 {
5269 if ((tls_mask & TLS_DTPREL) != 0)
5270 off += 4;
5271 }
5272 }
5273 }
5274 }
5275
5276 relocation = htab->got->output_offset + off - 4;
5277
5278 /* Addends on got relocations don't make much sense.
5279 x+off@got is actually x@got+off, and since the got is
5280 generated by a hash table traversal, the value in the
5281 got at entry m+n bears little relation to the entry m. */
5282 if (addend != 0)
5283 (*_bfd_error_handler)
5284 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
5285 input_bfd,
5286 input_section,
5287 (long) rel->r_offset,
5288 howto->name,
5289 sym_name);
5290 }
5291 break;
5292
5293 /* Relocations that need no special processing. */
5294 case R_PPC_LOCAL24PC:
5295 /* It makes no sense to point a local relocation
5296 at a symbol not in this object. */
5297 if (unresolved_reloc)
5298 {
5299 if (! (*info->callbacks->undefined_symbol) (info,
5300 h->root.root.string,
5301 input_bfd,
5302 input_section,
5303 rel->r_offset,
5304 TRUE))
5305 return FALSE;
5306 continue;
5307 }
5308 break;
5309
5310 case R_PPC_DTPREL16:
5311 case R_PPC_DTPREL16_LO:
5312 case R_PPC_DTPREL16_HI:
5313 case R_PPC_DTPREL16_HA:
5314 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5315 break;
5316
5317 /* Relocations that may need to be propagated if this is a shared
5318 object. */
5319 case R_PPC_TPREL16:
5320 case R_PPC_TPREL16_LO:
5321 case R_PPC_TPREL16_HI:
5322 case R_PPC_TPREL16_HA:
5323 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5324 /* The TPREL16 relocs shouldn't really be used in shared
5325 libs as they will result in DT_TEXTREL being set, but
5326 support them anyway. */
5327 goto dodyn;
5328
5329 case R_PPC_TPREL32:
5330 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5331 goto dodyn;
5332
5333 case R_PPC_DTPREL32:
5334 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5335 goto dodyn;
5336
5337 case R_PPC_DTPMOD32:
5338 relocation = 1;
5339 addend = 0;
5340 goto dodyn;
5341
5342 case R_PPC_REL24:
5343 case R_PPC_REL32:
5344 case R_PPC_REL14:
5345 case R_PPC_REL14_BRTAKEN:
5346 case R_PPC_REL14_BRNTAKEN:
5347 /* If these relocations are not to a named symbol, they can be
5348 handled right here, no need to bother the dynamic linker. */
5349 if (SYMBOL_REFERENCES_LOCAL (info, h)
5350 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5351 break;
5352 /* fall through */
5353
5354 /* Relocations that always need to be propagated if this is a shared
5355 object. */
5356 case R_PPC_ADDR32:
5357 case R_PPC_ADDR24:
5358 case R_PPC_ADDR16:
5359 case R_PPC_ADDR16_LO:
5360 case R_PPC_ADDR16_HI:
5361 case R_PPC_ADDR16_HA:
5362 case R_PPC_ADDR14:
5363 case R_PPC_ADDR14_BRTAKEN:
5364 case R_PPC_ADDR14_BRNTAKEN:
5365 case R_PPC_UADDR32:
5366 case R_PPC_UADDR16:
5367 /* r_symndx will be zero only for relocs against symbols
5368 from removed linkonce sections, or sections discarded by
5369 a linker script. */
5370 dodyn:
5371 if (r_symndx == 0)
5372 break;
5373 /* Fall thru. */
5374
5375 if ((input_section->flags & SEC_ALLOC) == 0)
5376 break;
5377 /* Fall thru. */
5378
5379 if ((info->shared
5380 && (h == NULL
5381 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5382 || h->root.type != bfd_link_hash_undefweak)
5383 && (MUST_BE_DYN_RELOC (r_type)
5384 || !SYMBOL_CALLS_LOCAL (info, h)))
5385 || (ELIMINATE_COPY_RELOCS
5386 && !info->shared
5387 && h != NULL
5388 && h->dynindx != -1
5389 && !h->non_got_ref
5390 && h->def_dynamic
5391 && !h->def_regular))
5392 {
5393 int skip;
5394
5395 #ifdef DEBUG
5396 fprintf (stderr, "ppc_elf_relocate_section needs to "
5397 "create relocation for %s\n",
5398 (h && h->root.root.string
5399 ? h->root.root.string : "<unknown>"));
5400 #endif
5401
5402 /* When generating a shared object, these relocations
5403 are copied into the output file to be resolved at run
5404 time. */
5405 if (sreloc == NULL)
5406 {
5407 const char *name;
5408
5409 name = (bfd_elf_string_from_elf_section
5410 (input_bfd,
5411 elf_elfheader (input_bfd)->e_shstrndx,
5412 elf_section_data (input_section)->rel_hdr.sh_name));
5413 if (name == NULL)
5414 return FALSE;
5415
5416 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5417 && strcmp (bfd_get_section_name (input_bfd,
5418 input_section),
5419 name + 5) == 0);
5420
5421 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5422 BFD_ASSERT (sreloc != NULL);
5423 }
5424
5425 skip = 0;
5426
5427 outrel.r_offset =
5428 _bfd_elf_section_offset (output_bfd, info, input_section,
5429 rel->r_offset);
5430 if (outrel.r_offset == (bfd_vma) -1
5431 || outrel.r_offset == (bfd_vma) -2)
5432 skip = (int) outrel.r_offset;
5433 outrel.r_offset += (input_section->output_section->vma
5434 + input_section->output_offset);
5435
5436 if (skip)
5437 memset (&outrel, 0, sizeof outrel);
5438 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5439 {
5440 unresolved_reloc = FALSE;
5441 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5442 outrel.r_addend = rel->r_addend;
5443 }
5444 else
5445 {
5446 outrel.r_addend = relocation + rel->r_addend;
5447
5448 if (r_type == R_PPC_ADDR32)
5449 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5450 else
5451 {
5452 long indx;
5453
5454 if (bfd_is_abs_section (sec))
5455 indx = 0;
5456 else if (sec == NULL || sec->owner == NULL)
5457 {
5458 bfd_set_error (bfd_error_bad_value);
5459 return FALSE;
5460 }
5461 else
5462 {
5463 asection *osec;
5464
5465 /* We are turning this relocation into one
5466 against a section symbol. It would be
5467 proper to subtract the symbol's value,
5468 osec->vma, from the emitted reloc addend,
5469 but ld.so expects buggy relocs. */
5470 osec = sec->output_section;
5471 indx = elf_section_data (osec)->dynindx;
5472 BFD_ASSERT (indx > 0);
5473 #ifdef DEBUG
5474 if (indx <= 0)
5475 printf ("indx=%d section=%s flags=%08x name=%s\n",
5476 indx, osec->name, osec->flags,
5477 h->root.root.string);
5478 #endif
5479 }
5480
5481 outrel.r_info = ELF32_R_INFO (indx, r_type);
5482 }
5483 }
5484
5485 loc = sreloc->contents;
5486 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5487 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5488
5489 if (skip == -1)
5490 continue;
5491
5492 /* This reloc will be computed at runtime. We clear the memory
5493 so that it contains predictable value. */
5494 if (! skip
5495 && ((input_section->flags & SEC_ALLOC) != 0
5496 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5497 {
5498 relocation = howto->pc_relative ? outrel.r_offset : 0;
5499 addend = 0;
5500 break;
5501 }
5502 }
5503 break;
5504
5505 case R_PPC_RELAX32PC_PLT:
5506 case R_PPC_RELAX32_PLT:
5507 BFD_ASSERT (h != NULL
5508 && h->plt.offset != (bfd_vma) -1
5509 && htab->plt != NULL);
5510
5511 relocation = (htab->plt->output_section->vma
5512 + htab->plt->output_offset
5513 + h->plt.offset);
5514 if (r_type == R_PPC_RELAX32_PLT)
5515 goto relax32;
5516 /* Fall thru */
5517
5518 case R_PPC_RELAX32PC:
5519 relocation -= (input_section->output_section->vma
5520 + input_section->output_offset
5521 + rel->r_offset - 4);
5522 /* Fall thru */
5523
5524 case R_PPC_RELAX32:
5525 relax32:
5526 {
5527 unsigned long t0;
5528 unsigned long t1;
5529
5530 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
5531 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
5532
5533 /* We're clearing the bits for R_PPC_ADDR16_HA
5534 and R_PPC_ADDR16_LO here. */
5535 t0 &= ~0xffff;
5536 t1 &= ~0xffff;
5537
5538 /* t0 is HA, t1 is LO */
5539 relocation += addend;
5540 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
5541 t1 |= relocation & 0xffff;
5542
5543 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
5544 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
5545 }
5546 continue;
5547
5548 /* Indirect .sdata relocation. */
5549 case R_PPC_EMB_SDAI16:
5550 BFD_ASSERT (htab->sdata[0].section != NULL);
5551 relocation
5552 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
5553 h, relocation, rel);
5554 break;
5555
5556 /* Indirect .sdata2 relocation. */
5557 case R_PPC_EMB_SDA2I16:
5558 BFD_ASSERT (htab->sdata[1].section != NULL);
5559 relocation
5560 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
5561 h, relocation, rel);
5562 break;
5563
5564 /* Handle the TOC16 reloc. We want to use the offset within the .got
5565 section, not the actual VMA. This is appropriate when generating
5566 an embedded ELF object, for which the .got section acts like the
5567 AIX .toc section. */
5568 case R_PPC_TOC16: /* phony GOT16 relocations */
5569 BFD_ASSERT (sec != NULL);
5570 BFD_ASSERT (bfd_is_und_section (sec)
5571 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5572 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
5573
5574 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5575 break;
5576
5577 case R_PPC_PLTREL24:
5578 /* Relocation is to the entry for this symbol in the
5579 procedure linkage table. */
5580 BFD_ASSERT (h != NULL);
5581
5582 if (h->plt.offset == (bfd_vma) -1
5583 || htab->plt == NULL)
5584 {
5585 /* We didn't make a PLT entry for this symbol. This
5586 happens when statically linking PIC code, or when
5587 using -Bsymbolic. */
5588 break;
5589 }
5590
5591 unresolved_reloc = FALSE;
5592 relocation = (htab->plt->output_section->vma
5593 + htab->plt->output_offset
5594 + h->plt.offset);
5595 break;
5596
5597 /* Relocate against _SDA_BASE_. */
5598 case R_PPC_SDAREL16:
5599 {
5600 const char *name;
5601
5602 BFD_ASSERT (sec != NULL);
5603 name = bfd_get_section_name (abfd, sec->output_section);
5604 if (! ((strncmp (name, ".sdata", 6) == 0
5605 && (name[6] == 0 || name[6] == '.'))
5606 || (strncmp (name, ".sbss", 5) == 0
5607 && (name[5] == 0 || name[5] == '.'))))
5608 {
5609 (*_bfd_error_handler)
5610 (_("%B: the target (%s) of a %s relocation is "
5611 "in the wrong output section (%s)"),
5612 input_bfd,
5613 sym_name,
5614 howto->name,
5615 name);
5616 }
5617 addend -= htab->sdata[0].sym_val;
5618 }
5619 break;
5620
5621 /* Relocate against _SDA2_BASE_. */
5622 case R_PPC_EMB_SDA2REL:
5623 {
5624 const char *name;
5625
5626 BFD_ASSERT (sec != NULL);
5627 name = bfd_get_section_name (abfd, sec->output_section);
5628 if (! (strncmp (name, ".sdata2", 7) == 0
5629 || strncmp (name, ".sbss2", 6) == 0))
5630 {
5631 (*_bfd_error_handler)
5632 (_("%B: the target (%s) of a %s relocation is "
5633 "in the wrong output section (%s)"),
5634 input_bfd,
5635 sym_name,
5636 howto->name,
5637 name);
5638
5639 bfd_set_error (bfd_error_bad_value);
5640 ret = FALSE;
5641 continue;
5642 }
5643 addend -= htab->sdata[1].sym_val;
5644 }
5645 break;
5646
5647 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5648 case R_PPC_EMB_SDA21:
5649 case R_PPC_EMB_RELSDA:
5650 {
5651 const char *name;
5652 int reg;
5653
5654 BFD_ASSERT (sec != NULL);
5655 name = bfd_get_section_name (abfd, sec->output_section);
5656 if (((strncmp (name, ".sdata", 6) == 0
5657 && (name[6] == 0 || name[6] == '.'))
5658 || (strncmp (name, ".sbss", 5) == 0
5659 && (name[5] == 0 || name[5] == '.'))))
5660 {
5661 reg = 13;
5662 addend -= htab->sdata[0].sym_val;
5663 }
5664
5665 else if (strncmp (name, ".sdata2", 7) == 0
5666 || strncmp (name, ".sbss2", 6) == 0)
5667 {
5668 reg = 2;
5669 addend -= htab->sdata[1].sym_val;
5670 }
5671
5672 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5673 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5674 {
5675 reg = 0;
5676 }
5677
5678 else
5679 {
5680 (*_bfd_error_handler)
5681 (_("%B: the target (%s) of a %s relocation is "
5682 "in the wrong output section (%s)"),
5683 input_bfd,
5684 sym_name,
5685 howto->name,
5686 name);
5687
5688 bfd_set_error (bfd_error_bad_value);
5689 ret = FALSE;
5690 continue;
5691 }
5692
5693 if (r_type == R_PPC_EMB_SDA21)
5694 { /* fill in register field */
5695 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5696 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5697 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5698 }
5699 }
5700 break;
5701
5702 /* Relocate against the beginning of the section. */
5703 case R_PPC_SECTOFF:
5704 case R_PPC_SECTOFF_LO:
5705 case R_PPC_SECTOFF_HI:
5706 case R_PPC_SECTOFF_HA:
5707 BFD_ASSERT (sec != NULL);
5708 addend -= sec->output_section->vma;
5709 break;
5710
5711 /* Negative relocations. */
5712 case R_PPC_EMB_NADDR32:
5713 case R_PPC_EMB_NADDR16:
5714 case R_PPC_EMB_NADDR16_LO:
5715 case R_PPC_EMB_NADDR16_HI:
5716 case R_PPC_EMB_NADDR16_HA:
5717 addend -= 2 * relocation;
5718 break;
5719
5720 case R_PPC_COPY:
5721 case R_PPC_GLOB_DAT:
5722 case R_PPC_JMP_SLOT:
5723 case R_PPC_RELATIVE:
5724 case R_PPC_PLT32:
5725 case R_PPC_PLTREL32:
5726 case R_PPC_PLT16_LO:
5727 case R_PPC_PLT16_HI:
5728 case R_PPC_PLT16_HA:
5729 case R_PPC_ADDR30:
5730 case R_PPC_EMB_RELSEC16:
5731 case R_PPC_EMB_RELST_LO:
5732 case R_PPC_EMB_RELST_HI:
5733 case R_PPC_EMB_RELST_HA:
5734 case R_PPC_EMB_BIT_FLD:
5735 (*_bfd_error_handler)
5736 (_("%B: relocation %s is not yet supported for symbol %s."),
5737 input_bfd,
5738 howto->name,
5739 sym_name);
5740
5741 bfd_set_error (bfd_error_invalid_operation);
5742 ret = FALSE;
5743 continue;
5744 }
5745
5746 /* Do any further special processing. */
5747 switch (r_type)
5748 {
5749 default:
5750 break;
5751
5752 case R_PPC_ADDR16_HA:
5753 case R_PPC_GOT16_HA:
5754 case R_PPC_PLT16_HA:
5755 case R_PPC_SECTOFF_HA:
5756 case R_PPC_TPREL16_HA:
5757 case R_PPC_DTPREL16_HA:
5758 case R_PPC_GOT_TLSGD16_HA:
5759 case R_PPC_GOT_TLSLD16_HA:
5760 case R_PPC_GOT_TPREL16_HA:
5761 case R_PPC_GOT_DTPREL16_HA:
5762 case R_PPC_EMB_NADDR16_HA:
5763 case R_PPC_EMB_RELST_HA:
5764 /* It's just possible that this symbol is a weak symbol
5765 that's not actually defined anywhere. In that case,
5766 'sec' would be NULL, and we should leave the symbol
5767 alone (it will be set to zero elsewhere in the link). */
5768 if (sec != NULL)
5769 /* Add 0x10000 if sign bit in 0:15 is set.
5770 Bits 0:15 are not used. */
5771 addend += 0x8000;
5772 break;
5773 }
5774
5775 #ifdef DEBUG
5776 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5777 "offset = %ld, addend = %ld\n",
5778 howto->name,
5779 (int) r_type,
5780 sym_name,
5781 r_symndx,
5782 (long) rel->r_offset,
5783 (long) addend);
5784 #endif
5785
5786 if (unresolved_reloc
5787 && !((input_section->flags & SEC_DEBUGGING) != 0
5788 && h->def_dynamic))
5789 {
5790 (*_bfd_error_handler)
5791 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5792 input_bfd,
5793 input_section,
5794 (long) rel->r_offset,
5795 howto->name,
5796 sym_name);
5797 ret = FALSE;
5798 }
5799
5800 r = _bfd_final_link_relocate (howto,
5801 input_bfd,
5802 input_section,
5803 contents,
5804 rel->r_offset,
5805 relocation,
5806 addend);
5807
5808 if (r != bfd_reloc_ok)
5809 {
5810 if (r == bfd_reloc_overflow)
5811 {
5812 if (warned)
5813 continue;
5814 if (h != NULL
5815 && h->root.type == bfd_link_hash_undefweak
5816 && howto->pc_relative)
5817 {
5818 /* Assume this is a call protected by other code that
5819 detect the symbol is undefined. If this is the case,
5820 we can safely ignore the overflow. If not, the
5821 program is hosed anyway, and a little warning isn't
5822 going to help. */
5823
5824 continue;
5825 }
5826
5827 if (! (*info->callbacks->reloc_overflow) (info,
5828 (h ? &h->root : NULL),
5829 sym_name,
5830 howto->name,
5831 rel->r_addend,
5832 input_bfd,
5833 input_section,
5834 rel->r_offset))
5835 return FALSE;
5836 }
5837 else
5838 {
5839 (*_bfd_error_handler)
5840 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
5841 input_bfd, input_section,
5842 (long) rel->r_offset, howto->name, sym_name, (int) r);
5843 ret = FALSE;
5844 }
5845 }
5846 }
5847
5848 #ifdef DEBUG
5849 fprintf (stderr, "\n");
5850 #endif
5851
5852 return ret;
5853 }
5854 \f
5855 /* Finish up dynamic symbol handling. We set the contents of various
5856 dynamic sections here. */
5857
5858 static bfd_boolean
5859 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
5860 struct bfd_link_info *info,
5861 struct elf_link_hash_entry *h,
5862 Elf_Internal_Sym *sym)
5863 {
5864 struct ppc_elf_link_hash_table *htab;
5865
5866 #ifdef DEBUG
5867 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
5868 h->root.root.string);
5869 #endif
5870
5871 htab = ppc_elf_hash_table (info);
5872 BFD_ASSERT (htab->elf.dynobj != NULL);
5873
5874 if (h->plt.offset != (bfd_vma) -1)
5875 {
5876 Elf_Internal_Rela rela;
5877 bfd_byte *loc;
5878 bfd_vma reloc_index;
5879
5880 #ifdef DEBUG
5881 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
5882 #endif
5883
5884 /* This symbol has an entry in the procedure linkage table. Set
5885 it up. */
5886
5887 BFD_ASSERT (h->dynindx != -1);
5888 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
5889
5890 /* We don't need to fill in the .plt. The ppc dynamic linker
5891 will fill it in. */
5892
5893 /* Fill in the entry in the .rela.plt section. */
5894 rela.r_offset = (htab->plt->output_section->vma
5895 + htab->plt->output_offset
5896 + h->plt.offset);
5897 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
5898 rela.r_addend = 0;
5899
5900 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
5901 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
5902 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
5903 loc = (htab->relplt->contents
5904 + reloc_index * sizeof (Elf32_External_Rela));
5905 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5906
5907 if (!h->def_regular)
5908 {
5909 /* Mark the symbol as undefined, rather than as defined in
5910 the .plt section. Leave the value alone. */
5911 sym->st_shndx = SHN_UNDEF;
5912 /* If the symbol is weak, we do need to clear the value.
5913 Otherwise, the PLT entry would provide a definition for
5914 the symbol even if the symbol wasn't defined anywhere,
5915 and so the symbol would never be NULL. */
5916 if (!h->ref_regular_nonweak)
5917 sym->st_value = 0;
5918 }
5919 }
5920
5921 if (h->needs_copy)
5922 {
5923 asection *s;
5924 Elf_Internal_Rela rela;
5925 bfd_byte *loc;
5926
5927 /* This symbols needs a copy reloc. Set it up. */
5928
5929 #ifdef DEBUG
5930 fprintf (stderr, ", copy");
5931 #endif
5932
5933 BFD_ASSERT (h->dynindx != -1);
5934
5935 if (h->size <= elf_gp_size (htab->elf.dynobj))
5936 s = htab->relsbss;
5937 else
5938 s = htab->relbss;
5939 BFD_ASSERT (s != NULL);
5940
5941 rela.r_offset = (h->root.u.def.value
5942 + h->root.u.def.section->output_section->vma
5943 + h->root.u.def.section->output_offset);
5944 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
5945 rela.r_addend = 0;
5946 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
5947 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5948 }
5949
5950 #ifdef DEBUG
5951 fprintf (stderr, "\n");
5952 #endif
5953
5954 /* Mark some specially defined symbols as absolute. */
5955 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5956 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
5957 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
5958 sym->st_shndx = SHN_ABS;
5959
5960 return TRUE;
5961 }
5962 \f
5963 static enum elf_reloc_type_class
5964 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5965 {
5966 switch (ELF32_R_TYPE (rela->r_info))
5967 {
5968 case R_PPC_RELATIVE:
5969 return reloc_class_relative;
5970 case R_PPC_REL24:
5971 case R_PPC_ADDR24:
5972 case R_PPC_JMP_SLOT:
5973 return reloc_class_plt;
5974 case R_PPC_COPY:
5975 return reloc_class_copy;
5976 default:
5977 return reloc_class_normal;
5978 }
5979 }
5980 \f
5981 /* Finish up the dynamic sections. */
5982
5983 static bfd_boolean
5984 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
5985 struct bfd_link_info *info)
5986 {
5987 asection *sdyn;
5988 struct ppc_elf_link_hash_table *htab;
5989
5990 #ifdef DEBUG
5991 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
5992 #endif
5993
5994 htab = ppc_elf_hash_table (info);
5995 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
5996
5997 if (htab->elf.dynamic_sections_created)
5998 {
5999 Elf32_External_Dyn *dyncon, *dynconend;
6000
6001 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
6002
6003 dyncon = (Elf32_External_Dyn *) sdyn->contents;
6004 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
6005 for (; dyncon < dynconend; dyncon++)
6006 {
6007 Elf_Internal_Dyn dyn;
6008 asection *s;
6009
6010 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
6011
6012 switch (dyn.d_tag)
6013 {
6014 case DT_PLTGOT:
6015 s = htab->plt;
6016 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6017 break;
6018
6019 case DT_PLTRELSZ:
6020 dyn.d_un.d_val = htab->relplt->size;
6021 break;
6022
6023 case DT_JMPREL:
6024 s = htab->relplt;
6025 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6026 break;
6027
6028 default:
6029 continue;
6030 }
6031
6032 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6033 }
6034 }
6035
6036 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
6037 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
6038 if (htab->got)
6039 {
6040 unsigned char *contents = htab->got->contents;
6041 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
6042
6043 if (sdyn == NULL)
6044 bfd_put_32 (output_bfd, 0, contents + 4);
6045 else
6046 bfd_put_32 (output_bfd,
6047 sdyn->output_section->vma + sdyn->output_offset,
6048 contents + 4);
6049
6050 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
6051 }
6052
6053 return TRUE;
6054 }
6055 \f
6056 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6057 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6058 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6059 #define TARGET_BIG_NAME "elf32-powerpc"
6060 #define ELF_ARCH bfd_arch_powerpc
6061 #define ELF_MACHINE_CODE EM_PPC
6062 #ifdef __QNXTARGET__
6063 #define ELF_MAXPAGESIZE 0x1000
6064 #else
6065 #define ELF_MAXPAGESIZE 0x10000
6066 #endif
6067 #define ELF_MINPAGESIZE 0x1000
6068 #define elf_info_to_howto ppc_elf_info_to_howto
6069
6070 #ifdef EM_CYGNUS_POWERPC
6071 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6072 #endif
6073
6074 #ifdef EM_PPC_OLD
6075 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6076 #endif
6077
6078 #define elf_backend_plt_not_loaded 1
6079 #define elf_backend_got_symbol_offset 4
6080 #define elf_backend_can_gc_sections 1
6081 #define elf_backend_can_refcount 1
6082 #define elf_backend_got_header_size 12
6083 #define elf_backend_rela_normal 1
6084
6085 #define bfd_elf32_mkobject ppc_elf_mkobject
6086 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6087 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6088 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6089 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6090 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6091
6092 #define elf_backend_object_p ppc_elf_object_p
6093 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6094 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6095 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6096 #define elf_backend_relocate_section ppc_elf_relocate_section
6097 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6098 #define elf_backend_check_relocs ppc_elf_check_relocs
6099 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6100 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6101 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6102 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6103 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6104 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6105 #define elf_backend_fake_sections ppc_elf_fake_sections
6106 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6107 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6108 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6109 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6110 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6111 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6112 #define elf_backend_write_section ppc_elf_write_section
6113 #define elf_backend_special_sections ppc_elf_special_sections
6114 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
6115
6116 #include "elf32-target.h"
git-cvsimport of binutils cvsroot